WO2017135391A1 - 偏光素子並びにそれを用いた偏光板及び表示装置 - Google Patents
偏光素子並びにそれを用いた偏光板及び表示装置 Download PDFInfo
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- WO2017135391A1 WO2017135391A1 PCT/JP2017/003874 JP2017003874W WO2017135391A1 WO 2017135391 A1 WO2017135391 A1 WO 2017135391A1 JP 2017003874 W JP2017003874 W JP 2017003874W WO 2017135391 A1 WO2017135391 A1 WO 2017135391A1
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- Prior art keywords
- group
- carbon atoms
- general formula
- azo compound
- represented
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- 0 Cc(c(O)c(ccc(NC(c1ccc(*)cc1)=O)c1)c1c1)c1S(O)(=O)=O Chemical compound Cc(c(O)c(ccc(NC(c1ccc(*)cc1)=O)c1)c1c1)c1S(O)(=O)=O 0.000 description 3
- GQXYLUQSUFDBRP-YAKSHHSUSA-N C/N=N/C(CC1)=CC=C1/N=N/c(cc1)ccc1/N=N\c(c(S(O)(=O)=O)cc1c2ccc(Nc3ccccc3)c1)c2O Chemical compound C/N=N/C(CC1)=CC=C1/N=N/c(cc1)ccc1/N=N\c(c(S(O)(=O)=O)cc1c2ccc(Nc3ccccc3)c1)c2O GQXYLUQSUFDBRP-YAKSHHSUSA-N 0.000 description 1
- FTBAYGZMLZFOMM-KEGFQUEQSA-N C/N=N/c(c(OC)c1)cc(OC)c1/N=N\c(c(OC)c1)cc(OC)c1/N=N\c(c(O)c(ccc(Nc1ccccc1)c1)c1c1)c1S(O)(=O)=O Chemical compound C/N=N/c(c(OC)c1)cc(OC)c1/N=N\c(c(OC)c1)cc(OC)c1/N=N\c(c(O)c(ccc(Nc1ccccc1)c1)c1c1)c1S(O)(=O)=O FTBAYGZMLZFOMM-KEGFQUEQSA-N 0.000 description 1
- LCOGFQYGOAZIMC-GSQMTXJWSA-N C/N=N\C(CC1)=CC=C1/N=N\C(CC1)=CC=C1N=N Chemical compound C/N=N\C(CC1)=CC=C1/N=N\C(CC1)=CC=C1N=N LCOGFQYGOAZIMC-GSQMTXJWSA-N 0.000 description 1
- SAXRFQXBBHOLAW-UHFFFAOYSA-N CCC(C)(C)C(CC1)=CC=C1N=N Chemical compound CCC(C)(C)C(CC1)=CC=C1N=N SAXRFQXBBHOLAW-UHFFFAOYSA-N 0.000 description 1
- MEOHMIQMICDJTQ-MSUUIHNZSA-N COc(c(N)c1)cc(/N=N\c(cc2)ccc2S(O)(=O)=O)c1OC Chemical compound COc(c(N)c1)cc(/N=N\c(cc2)ccc2S(O)(=O)=O)c1OC MEOHMIQMICDJTQ-MSUUIHNZSA-N 0.000 description 1
- OXFHRPLLNNXTHW-OFJJBNKGSA-N Cc(c(/N=N\c(cc1)ccc1S(O)(=O)=O)c1)cc(/N=N\c(c(C)c2)cc(OC)c2/N=N\c(c(O)c(ccc(Nc2ccccc2)c2)c2c2)c2S(O)(=O)=O)c1OC Chemical compound Cc(c(/N=N\c(cc1)ccc1S(O)(=O)=O)c1)cc(/N=N\c(c(C)c2)cc(OC)c2/N=N\c(c(O)c(ccc(Nc2ccccc2)c2)c2c2)c2S(O)(=O)=O)c1OC OXFHRPLLNNXTHW-OFJJBNKGSA-N 0.000 description 1
- WGTWXISEZKVZDQ-RIXDPRHCSA-N Cc(cc(cc1)N)c1/N=N\c(cc1)cc(C)c1/N=N\c(ccc(S(O)(=O)=O)c1)c1S(O)(=O)=O Chemical compound Cc(cc(cc1)N)c1/N=N\c(cc1)cc(C)c1/N=N\c(ccc(S(O)(=O)=O)c1)c1S(O)(=O)=O WGTWXISEZKVZDQ-RIXDPRHCSA-N 0.000 description 1
- WAMBAYIAHJYLHC-SMUBOAJYSA-N Cc1cc(/N=N/c(cc2)cc(C)c2/N=N\c(cc2)cc(C)c2/N=N/c(ccc(S(O)(=O)=O)c2)c2S(O)(=O)=O)c(C)cc1N Chemical compound Cc1cc(/N=N/c(cc2)cc(C)c2/N=N\c(cc2)cc(C)c2/N=N/c(ccc(S(O)(=O)=O)c2)c2S(O)(=O)=O)c(C)cc1N WAMBAYIAHJYLHC-SMUBOAJYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0033—Blends of pigments; Mixtured crystals; Solid solutions
- C09B67/0046—Mixtures of two or more azo dyes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/16—Trisazo dyes
- C09B31/18—Trisazo dyes from a coupling component "D" containing a directive amine group
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/30—Other polyazo dyes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/24—Disazo or polyazo compounds
- C09B45/28—Disazo or polyazo compounds containing copper
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
Definitions
- the present invention relates to a dye-based polarizing element, and a polarizing plate and a display using the same.
- the polarizing element is generally manufactured by adsorbing and orienting iodine or a dichroic dye, which is a dichroic dye, to a polyvinyl alcohol resin film.
- a protective film made of triacetyl cellulose or the like is bonded to at least one surface of the polarizing element through an adhesive layer to form a polarizing plate.
- the polarizing plate is used for a display device or the like.
- a polarizing plate using iodine as a dichroic dye is called an iodine-based polarizing plate, while a polarizing plate using a dichroic dye as a dichroic dye is called a dye-based polarizing plate.
- the dye-based polarizing plate is characterized by having high heat resistance, high humidity heat durability, high stability, and high color selectivity by the incorporation of a dichroic dye.
- Patent Documents 1 to 4 and Non-Patent Documents 1 and 2 disclose dye-based polarizing elements containing an azo compound.
- polarizing elements comprising conventional azo compounds described in Patent Documents 1 to 4 and Non-patent Documents 1 and 2 have poor polarization performance and contrast, and are sufficiently required for high-definition displays in recent years. It was not answered.
- An object of the present invention is to provide a polarizing element and a polarizing plate having excellent optical properties (polarization performance, contrast, etc.) and durability (humidity resistance, heat resistance, etc.).
- a polarizing plate having a high transmittance with a touch panel, an organic EL display, etc. and having no change in polarization degree even under heat, high temperature and high humidity environments is required, and the object of the present invention is To develop a polarizing plate that meets the
- the present inventors have improved the optical characteristics of the polarizing element and the durability against heat and humidity by using an azo compound having a specific structure as a result of earnest studies to solve the above problems. It has been found that it is possible to complete the present invention.
- the substrate and the form of the free acid have the following general formula (1) (Wherein, A represents a phenyl group having a substituent or a naphthyl group having a substituent, R 1 To R 6 Each independently represents a hydrogen atom, a hydroxy group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, and X represents a substituent M represents an amino group which may have, a benzoyl group which may have a substituent, a phenylazo group which may have a substituent, or a naphthotriazole group which may have a substituent, m And n each independently represent 0 or 1.
- the polarizing element may be one in which the copper atom is bonded to an oxygen atom in the polarizing element, and any one of the following i) to vi) is satisfied, i) an azo compound in which the form of the free acid is represented by the above general formula (1), 1 To R 6
- An amino group which may have a substituent selected from the group
- azo compound represented by the general formula (1) in the form of a free acid wherein at least n is 1; 1 To R 6
- An alkyl group, a phenylamino group which may have a substituent selected from the group consisting of an alkyl group, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group and a substituted amino group, an alkyl group having 1 to 4 carbon atoms ,
- An optionally substituted phenylazo group selected from the group consisting of an alkoxy group having 1 to 4 carbon atoms, a hydroxy group, a sulfo group, an amino group, and a substituted amino group, or an alky
- X is a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group.
- azo compound which is a substituent represented by iv) an azo compound in which the form of a free acid is represented by the above general formula (1), wherein R 1 To R 6 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, and X represents a group represented by the following general formula (2) (In the formula, X 1 Represents a hydrogen atom or an amino group, and when m and n are 0, X is 1 Represents an amino group.
- R 6 Is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group
- X is an amino which may have a substituent Azo compound which is a group, a benzoyl group which may have a substituent, or a phenylazo group which may have a substituent
- v) an azo compound in which the form of a free acid is represented by the above general formula (1), 1 To R 4 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group
- 5 And R 6 Each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- X represents a group represented by the following general formula (1)
- azo compound represented by the general formula (1) or the metal complex thereof wherein n is 1 and R is an azo compound which is a substituent represented by 1 , R 2 , And R 4 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, 3 , R 5 , And R 6 Is a methoxy group, and X is a substituent selected from the group consisting of a hydroxy group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group A substituent selected from the group consisting of benzoyl group which may have, hydroxy group, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, sulfo group,
- R is a substituent represented by 5 And R 6
- R is a substituent represented by 5 And R 6
- the form of the free acid is the following general formula (8): azo compound wherein each of H.sup.2 is independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group; (In the formula, A, R 1 To R 6 , And X have the same meaning as described in the general formula (1).
- Azo compound represented by or a metal complex thereof wherein m is 0, R 3 , R 4 , And R 6 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, 5 Is a methoxy group, and X is a group of the following general formula (9) (Wherein, h represents an integer of 1 to 3) And an azo compound which is a substituent represented by (2)
- the polarizing element according to (1), wherein the form of the free acid is the following general formula (1-1): (Wherein, Ar 11 Represents a substituted phenyl group or a substituted naphthyl group, and Rr 11 To Rr 16 And each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to
- the form of the azo compound represented by and the free acid is represented by the following general formula (1-2) (Wherein, Ab 11 Represents a substituted phenyl group or a substituted naphthyl group, and Rb 11 ⁇ Rb 15 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, Xb 11 Is an amino group which may have a substituent, a phenylazo group which may have a substituent, a benzoyl group which may have a substituent, or a naphthotriazole group which may have a substituent Represents ) And an azo compound represented by the formula: (3) The polarizing element according to the item (2), wherein the azo compound in which the form of the free acid is represented by the general formula (1-2) is a form in which the form of the free acid is the
- the polarizing element according to item (1), wherein the form of the free acid is the following general formula (2-1) (Wherein, Ar 21
- the form of the azo compound represented by and the free acid is represented by the following general formula (2-2) (Wherein, Ab 21 Represents a substituted phenyl group or a substituted naphthyl group, and Rb 21 ⁇ Rb 26 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, Xb 21 Is a phenylamino group optionally having a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group, carbon A phenylazo group which may have a substituent selected from the group consisting of an alkyl group of 1 to 4, an alkoxy group of 1 to 4 carbon atoms, a hydroxy group,
- the form of the azo compound represented by and the free acid is represented by the following general formula (2-3) (Wherein, Ag 21 Represents a nitro group or an amino group, and Rg 21 And Rg 22 Each independently represents a hydrogen atom, a hydroxy group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group; 21 Is a benzoyl group which may have a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group, the carbon number A benzoylamino group optionally having a substituent selected from the group consisting of an alkyl group of 1 to 4, an alkoxy group of 1 to 4 carbon atoms, a sulfo group, an amino group, and a
- a polarizing element comprising: an azo compound represented by: or a metal complex thereof (8)
- a polarizing element characterized in that it is an azo compound represented by (10) The polarizing element according to any one of the items (7) to (9), wherein Xg in the general formula (2-3) or (2-4) 21 Is a phenylamino group which may have a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group
- a polarizing element characterized by (11) The polarizing element according to any one of the items (7) to (10), wherein Xr in the general formula (1) 21 Is an amino group, and (12) The polarizing element according to item (1), wherein the form of the free acid is the following general formula (3-1) (Wherein, Ab 31 Represents a substituted phenyl group or a substituted naphthyl group, and Xb 31 And Xb 32 Each independently represents a hydrogen atom, an alkyl
- a polarizer comprising at least one azo compound represented by the formula: (13)
- the polarizing element according to (12) wherein the azo compound of which the form of the free acid is represented by the general formula (3-1) or the copper compound thereof has a form of the free acid of the following general formula (3) -2) (Wherein, Ab 31 , Xb 31 , And Xb 32 Has the same meaning as described in (12).
- the polarizing element according to any one of (12) to (14), wherein the form of the free acid is the following general formula (3-3) (Wherein, Ar 31 Represents a substituted phenyl group or a substituted naphthyl group, and Rr 31 To Rr 36 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms; 31 Represents a hydrogen atom or an amino group, and m3 and n3 each independently represent 0 or 1.
- a polarizing element further comprising an azo compound represented by (16) A polarizing element described in the item (15), wherein Xr in the general formula (3-3) 31 Is an amino group, and (17) A polarizing element according to item (1), which is represented by the following general formula (2-1): (Wherein, Ar 21 Represents a substituted phenyl group or a substituted naphthyl group, and Rr 21 To Rr 26 And each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, Xr 21 Represents a hydrogen atom or an amino group, m2 and n2 each independently represent 0 or 1, and when m2 and n2 are 0, Xr 21 Represents an amino group.
- Ar 21 represents a substituted phenyl group or a substituted naphthyl group
- azo compound represented by the general formula (4-2) (Wherein, Ab 41 Represents a substituted phenyl group or a substituted naphthyl group, and Rb 41 Represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, Xb 41 Represents an amino group which may have a substituent, a benzoyl group which may have a substituent, or a phenylazo group which may have a substituent. ) And an azo compound represented by the formula: or a salt thereof.
- (22) A polarizing element described in the item (1), wherein the form of the free acid is the following general formula (5-1) (Wherein, Ar 51 Represents a substituted phenyl group or a substituted naphthyl group, and Rr 51 To Rr 54 And each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, Rr 55 And Rr 56 Each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and Xr 51 Represents a hydrogen atom or an amino group, and m5 and n5 each independently represent 0 or 1.
- the form of the azo compound represented by and the free acid is represented by the following general formula (5-2) (Wherein, Ab 51 Represents a substituted phenyl group or a substituted naphthyl group, and Rb 51 ⁇ Rb 53 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, Xb 51 Is a benzoyl group optionally having a substituent selected from the group consisting of a hydroxy group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group Group, hydroxy group, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, sulfo group, amino group, and benzoyl group optional
- the form of the azo compound represented by and the free acid is represented by the following general formula (6-2) (Wherein, Ag 61 Represents a substituted phenyl group or a substituted naphthyl group, and Rg 61 ⁇ Rg 63 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group; h6 is an integer of 1 to 3 Show.
- a polarizing element comprising: an azo compound represented by: or a metal complex thereof (26)
- the polarizing element according to item (25), wherein the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (6-2) is a compound represented by the following general formula (6-4) (Wherein, Ag 61 , Rg 61 ⁇ Rg 63 , And h6 have the same meaning as described in the general formula (6-2).
- Ay 1 R represents a sulfo group, a carboxy group, a hydroxy group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
- Ry 1 ⁇ Ry 4 Each independently represents a hydrogen atom, a sulfo group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
- p1 represents an integer of 1 to 3.
- a polarizing element further comprising an azo compound represented by (31)
- a polarizing element it is possible to provide a polarizing element, a polarizing plate, and a display device excellent in optical properties and durability.
- the polarizing element of the present invention comprises a substrate, an azo compound of which the form of the free acid is represented by the above general formula (1), and its copper compound and metal complex (excluding copper compound), and R 5 has carbon number
- the copper compound of the azo compound in the case of an alkoxy group of 1 to 4, the alkyl group in the alkoxy group is replaced by a copper atom, and oxygen in the hydroxy group on the naphthalene ring in the general formula (1)
- the copper atom may be bonded to the atom, and any of the following requirements i) to vi) is satisfied.
- R 1 to R 6 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms Or an alkoxy group having 1 to 4 carbon atoms having a sulfo group
- X is an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group
- an azo compound in which the form of the free acid is represented by the above general formula (1), wherein R 1 to R 6 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms An azo compound which is an alkoxy group of 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, and X is a substituent represented by the general formula (2), An azo compound represented by the general formula (1) in the form of a free acid, wherein at least n is 1 and R 1 to R 6 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; An alkoxy group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, X is an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an
- an azo compound in which the form of a free acid is represented by the above general formula (1), wherein R 1 to R 6 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms An azo compound which is an alkoxy group of 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, and X is a substituent represented by the general formula (2),
- the form of the free acid is a copper compound of the azo compound represented by the general formula (1), wherein the form of the free acid is represented by the general formula (5), m and n are 0, and R 6 is A hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, and X is an amino group which may have a substituent
- an azo compound in which the form of a free acid is represented by the above general formula (1), wherein R 1 to R 4 are each independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms Or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, and R 5 and R 6 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; An azo compound which is a substituent represented by 6),
- the free acid is an azo compound represented by the above general formula (1) or a metal complex thereof, wherein n is 1 and R 1 , R 2 and R 4 are each independently a hydrogen atom or a carbon number A C 1-4 alkoxy group having a 1-4 alkyl group, an alkoxy group having 1-4 carbon atoms, or a sulfo group, R 3 , R 5 and R 6 each represents a methoxy group, and X represents A benzoyl group optionally having a
- An azo compound in which the form of a free acid is represented by the above general formula (1), wherein R 1 to R 6 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms Or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, X is a substituent represented by the general formula (7), and when m and n are 1, R 5 and An azo compound in which each R 6 independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group;
- the azo compound or the metal complex thereof, wherein the form of the free acid is represented by the above general formula (8), wherein m is 0, and R 3 , R 4 and R 6 are each independently a hydrogen atom or a carbon number A C 1-4 alkoxy group having a 1-4 alkyl group, an alkoxy group having 1-4 carbon atom
- Embodiments satisfying the requirements of the above i) to vi) in the polarizing element of the present invention will be described below as the first to sixth embodiments.
- the polarizing element according to the first embodiment of the present invention comprises a substrate, an azo compound of which the form of free acid is represented by the above general formula (1-1), and a form of the free acid of the above general formula (1- And the azo compound represented by 2).
- the azo compound in which the form of the free acid is represented by the general formula (1-1) is an azo compound in which the form of the free acid is represented by the general formula (1-3), it has a higher degree of polarization A polarization element can be realized.
- the form of the free acid is the above general formula (10) It is more preferable to further include the azo compound represented. Thereby, a polarization element having a still higher degree of polarization can be realized. It is preferable that the azo compound in which the form of the free acid is represented by each of the general formulas (1-1), (1-2), and (10) is adsorbed to the substrate.
- the azo compounds in which the form of the free acid is represented by the general formulas (1-1), (1-2), and (10) can be represented by the general formulas (1-1), (1-2), and (10). It may be contained in the polarizing element in the form of the free acid represented, and may be contained in the form of the salt of the azo compound represented by the general formulas (1-1), (1-2) and (10). It may be included.
- the salts include alkali metal salts such as lithium salts, sodium salts and potassium salts; alkaline earth metal salts; ammonium salts; organic salts such as alkylamine salts and alkanolamine salts.
- the salt is preferably a lithium salt, a sodium salt, a potassium salt or an ammonium salt, more preferably a lithium salt or a sodium salt, and still more preferably a sodium salt.
- the azo compound used as a dye in the polarizing element of the present embodiment is generally a known diazotized compound in accordance with a synthesis method (for example, page 626 of Non-patent Document 1) known in the art. It can be synthesized by coupling.
- the azo compound can be dissolved in a solution, and the substrate can be impregnated in the dyeing step to produce a polarizing element.
- Ar 11 represents a phenyl group having a substituent or a naphthyl group having a substituent
- Rr 11 to Rr 16 each independently represent a hydrogen atom or an alkyl having 1 to 4 carbon atoms Group, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group
- Xr 11 represents an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group
- benzoyl group which may have a substituent selected from the group consisting of and substituted amino group, alkoxy group having 1
- Ar 11 represents a phenyl group having a substituent or a naphthyl group having a substituent, but when Ar 11 is a phenyl group having a substituent, the phenyl group is at least one sulfo group or carboxy group as a substituent It is preferable that when the phenyl group has two or more substituents, at least one of the substituents is a sulfo group or a carboxy group, and the other substituent is a sulfo group, a carboxy group, the carbon number 1 to 4 alkyl group, alkoxy group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms having sulfo group, hydroxyl group, nitro group, amino group, or substituted amino group (in particular, acetylamino group or carbon It is preferable that it is an alkylamino group of 1 to 4), and the other substituent is a sulfo group, a carboxy group,
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the number of substituents on the phenyl group is preferably 1 or 2, and the position of the substituent on the phenyl group is not particularly limited, but may be only 4-position or a combination of 2-position and 4-position Preferably, it is a combination of 3-position and 5-position.
- Ar 11 is a substituted naphthyl group
- the naphthyl group have at least one sulfo group as a substituent, and when the naphthyl group has two or more substituents, these substituents
- at least one of the groups is a sulfo group
- the other substituent is a sulfo group, a hydroxy group, a carboxy group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group.
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the substitution position of the sulfo group is preferably a combination of 4- and 8-positions or a combination of 6- and 8-positions, and 6- and Particularly preferred is a combination with the 8-position.
- the substitution position of the sulfo group is particularly preferably a combination of 1-position, 3-position and 6-position.
- Xr 11 is an amino group which may have a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group
- a benzoyl group which may have a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group, 1 carbon atom
- a phenylamino group which may have a substituent selected from the group consisting of an alkoxy group, a sulfo group, an amino group and a substituted amino group, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group
- a benzoylamino group which may have a substituent selected from the group consisting of: substituted amino group, an al
- Xr 11 is a phenylamino group which may have a substituent selected from the group consisting of an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group, an alkoxy having 1 to 4 carbon atoms Group which may have a substituent selected from the group consisting of sulfo group, amino group and substituted amino group, or alkoxy group having 1 to 4 carbon atoms, sulfo group, amino group and substituted amino group It is preferable that it is a benzoylamino group which may have a substituent selected from the group which consists of groups, and it is especially preferable that it is a phenylamino group which may have a substituent.
- Xr 11 has a substituent selected from the group consisting of an amino group and a substituted amino group, or a benzoyl group optionally having a substituent selected from the group consisting of an amino group and a substituted amino group It is further preferred that it is a good benzoylamino group.
- Xr 11 is an alkyl group having 1 to 4 carbon atoms, a benzoyl group, 1 to 4 carbon atoms which has a substituent selected from the group consisting of alkoxy group, a sulfo group, an amino group and substituted amino group, having 1 to 4 carbon atoms
- the substituent is a phenylazo group having a substituent and the number of substitu
- R r 11 to R r 16 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group; It is preferably an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably a hydrogen atom, a methyl group or a methoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group is preferably a linear alkoxy group, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- n1 may be each independently 0 or 1, but in order to obtain good polarization performance in the polarizing element of this embodiment, when one of m1 and n1 is 0, the other is 1 preferable.
- Rr 15 and Rr 16 are each a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or It is necessary that the alkoxy group has 1 to 4 carbon atoms having a sulfo group, and is preferably a hydrogen atom or a methyl group.
- an alkyl group having 1 to 4 carbon atoms an alkoxy group having 1 to 4 carbon atoms, and an alkoxy group having 1 to 4 carbon atoms having a sulfo group
- an alkyl group having 1 to 3 carbon atoms an alkoxy having 1 to 3 carbon atoms
- an alkoxy group having 3 or 4 carbon atoms having a sulfo group is preferable.
- the substituted amino group is not particularly limited, and examples thereof include an amino group substituted with an alkyl group having 1 to 4 carbon atoms, and an amino group substituted with an acyl group.
- Examples of the method for synthesizing the azo compound in which the form of the free acid is represented by the general formula (1-1) include, for example, JP-A-9-302250, JP-A-26222748, JP-A-4662853 and International Publication 2012 Examples thereof include, but are not limited to, the methods described in JP-A-108169 and WO 2012/108173.
- Examples of the azo compound in which the form of the free acid is represented by General Formula (1-1) include C.I. I. Direct Red 117, C.I. I. Direct Red 127, the azo compound described in Patent No. 2622748, the azo compound described in Japanese Patent No. 4662853, the azo compound described in International Publication WO 2012/108169, and the like.
- Ab 11 represents a phenyl group having a substituent or a naphthyl group having a substituent
- Rb 11 to Rb 15 each independently represent a hydrogen atom or an alkyl having 1 to 4 carbon atoms.
- Xb 11 is an amino group which may have a substituent (a substitution other than a phenyl group and a benzoyl group An amino group which may have a group, a phenylamino group which may have a substituent, or a benzoylamino group which may have a substituent), a phenylazo group which may have a substituent Benzoyl group which may have a substituent (benzoyl group which may have a substituent other than amino group, or aminobenzoyl group which may have a substituent), or which has a substituent Even if There representing the naphthotriazole group.
- the azo compound of which the form of the free acid is represented by the above general formula (1-2) has the form of the free acid of the following general formula (1-3)
- the polarization performance of the polarizing element is further improved.
- Ab 11 , Rb 11 to Rb 15 and Xb 11 have the same meanings as described in the general formula (1-2).
- Ab 11 represents a phenyl group having a substituent or a naphthyl group having a substituent, and when Ab 11 is a phenyl group having a substituent, Preferably, the phenyl group has at least one sulfo group or carboxy group as a substituent, and when the phenyl group has two or more substituents, at least one of the substituents is a sulfo group or a carboxy group.
- the other substituent is a sulfo group, a carboxy group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms having a sulfo group, a nitro group, a hydroxyl group It is preferably an amino group or a substituted amino group (in particular, an acetylamino group or an alkylamino group having 1 to 4 carbon atoms).
- the other substituent is more preferably a sulfo group, a carboxy group, a methyl group, an ethyl group, a methoxy group, an ethoxy group, a nitro group, a hydroxyl group or an amino group, and a sulfo group, a carboxy group, a methyl group or an ethyl group. It is more preferably a group, a methoxy group, an ethoxy group, a nitro group or an amino group, particularly preferably a sulfo group, a carboxy group, a methyl group, a methoxy group or an ethoxy group.
- the other substituent is preferably a sulfo group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the number of substituents on the phenyl group is preferably 1 or 2, and more preferably 2.
- the position of the substituent on the phenyl group is not particularly limited, but is preferably 4-position only, or a combination of 2-position and 4-position, or a combination of 3-position and 5-position Particularly preferred is a combination of 2- and 4-positions.
- the naphthyl group has at least one sulfo group as a substituted group
- R 2 has two or more substituents, at least one of the substituents is a sulfo group, and the other substituents have a sulfo group, a hydroxy group, a carboxy group, or a sulfo group-containing 1 to 4 carbon atoms
- it is preferable that it is an alkoxy group of
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the substitution position of the sulfo group is preferably a combination of 4- and 8-positions or a combination of 6- and 8-positions, and 6- and Particularly preferred is a combination with the 8-position.
- the substitution position of the sulfo group is particularly preferably a combination of 1-position, 3-position and 6-position.
- Xb 11 has an amino group which may have a substituent, a phenylazo group which may have a substituent, and a substituent. Or benzoyl group which may be substituted or naphthotriazole group which may be substituted.
- Xb 11 has a benzoylamino group which may have a substituent, a phenylamino group which may have a substituent, a phenylazo group which may have a substituent, or a substituent It is preferable that it is also a naphthotriazole group, and it may be a benzoylamino group which may have a substituent, a phenylamino group which may have a substituent, or a phenylazo group which may have a substituent. It is more preferable that it is a phenylamino group which may have a substituent.
- Xb 11 is an amino group which may have one or two substituents selected from the group consisting of a methyl group, a methoxy group, a sulfo group, an amino group, and an alkylamino group having 1 to 4 carbon atoms, A phenylamino group optionally having one or two substituents selected from the group consisting of a methyl group, a methoxy group, a sulfo group, an amino group, and an alkylamino group having 1 to 4 carbon atoms, an amino group, And benzoyl group optionally having one substituent selected from the group consisting of and carboxyethylamino group, and even having one substituent selected from the group consisting of an amino group and a carboxyethylamino group Selected from the group consisting of good benzoylamino group, or hydroxy group, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, amino group, and carboxyethyla
- Xb 11 is a benzoyl group having a substituent, a benzoylamino group having a substituent, a phenylamino group having a substituent, a phenylazo group having a substituent, or a benzoyl group having a substituent, and a substituent on the phenyl group
- the position of the substituent on the phenyl group is not particularly limited, but is preferably the p-position relative to the substitution position of the nitrogen atom on the phenyl group.
- Xb 11 is a benzoyl group having a substituent, a benzoylamino group having a substituent, a phenylamino group having a substituent, or a phenylazo group having a substituent
- the substituent is an alkyl group having 1 to 4 carbon atoms And an alkoxy group having 1 to 4 carbon atoms, a hydroxy group, a carboxy group, a sulfo group, an amino group or a substituted amino group.
- Xb 11 is a benzoyl group having a substituent or a benzoylamino group having a substituent
- the substituent is preferably an amino group, a substituted amino group or a hydroxy group, and particularly preferably an amino group.
- the position of the substituent on the benzoylamino group is not particularly limited, but is preferably the p-position relative to the carbonyl group in the benzoylamino group.
- the substituent is preferably a methyl group, a methoxy group, an amino group, a substituted amino group, or a sulfo group, and a methoxy group or an amino group Particularly preferred.
- the substitution position on the phenylamino group is not particularly limited, but is preferably the p-position relative to the substitution position of the nitrogen atom.
- the substituent is preferably a hydroxy group, an amino group, a methyl group, a methoxy group, or a carboxy group, and particularly preferably a hydroxy group.
- the substituent is preferably a sulfo group.
- each Rb 11 ⁇ Rb 15 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms or a sulfo group, Preferably represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and a hydrogen atom, a methyl group or a methoxy group It is more preferable that Further, as the alkoxy group having 1 to 4 carbon atoms having a sulfo group, a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- Rb 15 is a methoxy group, the polarization performance of the polarizing element is particularly improved, which is particularly preferable.
- the free acid is an azo compound represented by the above general formula (1-2) or (1-3) and Rb 15 is a methoxy group.
- the azo compounds the following general formula (1-5) (Wherein, Ab 11 , Rb 12 , Rb 14 and Xb 11 have the same meaning as described in the general formula (1-2).)
- the azo compound represented by is preferable.
- each Rb 12 and Rb 14 independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or 1 carbon atoms having a sulfo group; 4 represents an alkoxy group, preferably a hydrogen atom, a methyl group or a methoxy group, more preferably a hydrogen atom or a methyl group.
- the azo compound in which the form of the free acid is represented by the general formula (1-2) or (1-3) has a structure as represented by the general formula (1-5), in particular It is preferable from the viewpoint of improvement.
- the azo compound in which the form of the free acid is represented by the general formula (1-2), (1-3), or (1-5) has, for example, a synthesis method as described in Non-Patent Document 1 or The compound can be easily synthesized by performing the diazotization and coupling described in Publication No. 2012/108169, WO 2012/108173 and the like.
- the synthesis method of the azo compound in which the form of the free acid is represented by the general formula (1-2), (1-3) or (1-5) is not limited to the methods described in the above-mentioned documents .
- the azo compound whose form of a free acid is represented by General formula (1-2), (1-3), or (1-5) can also be processed by copper sulfate etc., and can be made into a copper complex salt compound. .
- the content of the azo compound in which the form of the free acid is represented by the general formula (1-2) is the content of the azo compound in which the form of the free acid is represented by the general formula (1-1)
- the content is preferably in the range of 10 to 5000 parts by weight, and more preferably in the range of 20 to 3000 parts by weight with respect to 100 parts by weight of the content.
- Ay 1 represents a sulfo group, a carboxy group, a hydroxy group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
- Ry 1 to Ry 4 are each independently And a hydrogen atom, a sulfo group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
- p1 represents an integer of 1 to 3. It is preferable that Ay 1 is a carboxy group or a sulfo group.
- Examples of the method for synthesizing the azo compound in which the form of the free acid is represented by the general formula (10) include the synthesis method described in Non-Patent Document 1 and the method described in WO 2007/138980. However, it is not limited to these.
- Examples of the azo compound in which the form of the free acid is represented by the general formula (10) include C.I. I. Direct yellow 12, C.I. I. Direct Yellow 72, C.I. I. Direct Orange 39 (CAS No. 1325-54-8), azo compounds described in WO 2007/138980, and the like, but not limited thereto.
- the content of the azo compound in which the form of the free acid is represented by the general formula (10) is the content of the azo compound in which the form of the free acid is represented by the general formula (1-1)
- the amount is preferably in the range of 1 to 1000 parts by weight, and more preferably in the range of 5 to 800 parts by weight with respect to 100 parts by weight.
- the azo compound having the form of a free acid represented by the general formula (1-1) as the azo compound and the free acid By using the azo compound represented by the general formula (1-2), the optical properties and the durability are improved.
- a polarizing element according to a second embodiment of the present invention comprises a substrate, an azo compound of which the form of free acid is represented by the general formula (2-1), and a form of the free acid of the general formula (2-
- the azo compound represented by 2) and the azo compound represented by the above general formula (2-3) or the metal complex thereof are included.
- the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (2-3) is the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (2-4)
- a polarization element having a higher degree of polarization can be realized.
- the azo compound in which the form of the free acid is represented by the general formula (2-2) is an azo compound in which the form of the free acid is represented by the general formula (2-5), it has a higher degree of polarization A polarization element can be realized.
- the azo compounds in which the form of the free acid is represented by the general formulas (2-1) and (2-2), respectively, and the form of the free acid are represented in the table by the general formula (2-3).
- the form of a free acid contains the azo compound represented by the said General formula (10) in addition to the azo compound or its metal complex which is made, the polarizing element which has still higher polarization degree is realizable.
- the azo compounds in which the form of the free acid is represented by the general formulas (2-1), (2-2) and (10), and the form of the free acid are represented by the general formula (2-3)
- the azo compound or the metal complex thereof is preferably adsorbed to the substrate.
- the azo compounds in which the form of the free acid is represented by the general formulas (2-1), (2-2) and (10) can be obtained by the general formulas (2-1), (2-2) and (10) It may be contained in the polarizing element in the form of the free acid represented, and in the form of a salt of the azo compound represented by the general formulas (2-1), (2-2), (10) It may be included.
- the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (2-3) is contained in the polarizing element in the form of the free acid represented by the general formula (2-3) It may be contained in the polarizing element in the form of the azo compound represented by the general formula (2-3) or a salt of the metal complex thereof.
- the salts include alkali metal salts such as lithium salts, sodium salts and potassium salts; alkaline earth metal salts; ammonium salts; organic salts such as alkylamine salts and alkanolamine salts.
- the salt is preferably a lithium salt, a sodium salt, a potassium salt or an ammonium salt, more preferably a lithium salt or a sodium salt, and still more preferably a sodium salt.
- the azo compound used as a dye in the polarizing element of the present embodiment is generally a known diazotized compound in accordance with a synthesis method (for example, page 626 of Non-patent Document 1) known in the art. It can be synthesized by coupling.
- the azo compound can be dissolved in a solution, and the substrate can be impregnated in the dyeing step to produce a polarizing element.
- each of Rr 21 to Rr 26 independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a carbon number of 1 to 4 having a sulfo group.
- the alkoxy group of 4 is represented, preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and more preferably a hydrogen atom or a methyl group.
- Xr 21 represents a hydrogen atom or an amino group, but when m2 and n2 are 0, Xr 21 is an amino group, and at least one of m2 and n2 is 1 In such a case, Xr 21 is preferably an amino group in order to improve the polarization characteristics of the polarizing element.
- Ar 21 represents a phenyl group having a substituent or a naphthyl group having a substituent.
- the substituent on the phenyl group is sulfo group, carboxy group, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, hydroxy group, alkoxy group having 1 to 4 carbon atoms having sulfo group, sulfo substitution
- the naphthotriazole group, the nitro group, the amino group or the substituted amino group is preferred.
- the substituent on the naphthyl group is preferably a sulfo group, a hydroxy group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group.
- Ar 21 is preferably a phenyl group or a naphthyl group having one or more sulfo groups or carboxy groups, and in order to improve the durability of the polarizing element, a phenyl group having two or more sulfo groups or carboxy groups or It is more preferable that it is a naphthyl group.
- Ar 21 is more preferably a phenyl group having a sulfo group or a carboxy group in order to further improve the polarization characteristics of the polarization element and to produce a neutral-color polarization element.
- m2 and n2 each independently represent 0 or 1, but in order to obtain good polarization performance, it is preferable that at least one of m2 and n2 be 1, m2 and n2 More preferably, both are 1.
- the substituted amino group is not particularly limited, and includes, for example, an alkyl group having 1 to 4 carbon atoms or an amino group substituted with an acyl group.
- Examples of the method for synthesizing the azo compound in which the form of the free acid is represented by the general formula (2-1) include, for example, JP-A-9-302250, JP-A-4626285, JP-A-4162334, and International Publication No. Examples thereof include, but are not limited to, the methods described in 2012/108169 and WO 2012/108173.
- Examples of the azo compound in which the form of the free acid is represented by the above general formula (2-1) include C.I. I. Direct Red 117, C.I. I. Direct Red 127, a dye described in International Publication No. 2005/075572 (Japanese Patent No. 4662853), a dye described in Japanese Patent No. 4162334, an azo compound described in Japanese Patent No. 4452237 And azo compounds such as specific examples (14), (21) and (47) of WO 2012/108169, and dyes described in WO 2013/008735.
- Ab 21 represents a phenyl group having a substituent or a naphthyl group having a substituent
- Rb 21 to Rb 26 each independently represent a hydrogen atom or an alkyl having 1 to 4 carbon atoms Group, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group
- Xb 21 represents an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group
- An amino group, and a phenylamino group which may have a substituent selected from the group consisting of a substituted amino group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a hydroxy group, sulfo
- a phenylazo group which may have a substituent selected from the group consisting of an amino group and a substituted amino group
- the azo compound of which the form of the free acid is represented by the above general formula (2-2) has the form of the free acid of the following general formula (2-5)
- the polarization performance of the polarizing element is further improved.
- Ab 21 , Rb 21 to Rb 26 and t 2 have the same meaning as described in the general formula (2-2)
- Xb 22 and Xb 23 are each independently And a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group or a substituted amino group.
- the phenyl group when Ab 21 is a phenyl group having a substituent, the phenyl group may have at least one sulfo group or a carbonyl group as a substituent
- the phenyl group has two or more substituents, at least one of the substituents is a sulfo group, and the other substituent is a hydrogen atom, a sulfo group, or an alkyl group having 1 to 4 carbon atoms.
- an alkoxy group having 1 to 4 carbon atoms an alkoxy group having 1 to 4 carbon atoms having a sulfo group, a carboxy group, a nitro group, an amino group or a substituted amino group, and a methoxy group, an ethoxy group or a carboxy group More preferably, it is a nitro group or an amino group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the number of substituents of the substituted phenyl group is preferably 2.
- the phenyl group having one substituent is preferably, but not limited to, a phenyl group having a substituent at 4-position (p-position), and as a phenyl group having two substituents, 2-position (o More preferred is a phenyl group having a substituent at the -position) and the 4-position (p-position).
- the naphthyl group having a substituent when Ab 21 is a naphthyl group having a substituent, it is preferable that the naphthyl group has at least one sulfo group, and the naphthyl group is preferably When it has two or more substituents, it is preferable that at least one of those substituents is a sulfo group.
- a naphthyl group having at least one sulfo group a naphthyl group having two or three sulfo groups is preferable.
- the substituent other than the sulfo group is a hydroxy group, a carboxy group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group. Is preferred.
- Xb 21 is composed of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group
- a phenylamino group which may be substituted, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a hydroxy group, a sulfo group, an amino group, and a substituted amino group selected from the group consisting of A phenylazo group which may have a substituent selected from the group consisting of, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group
- Xb 21 is a phenylamino group having a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group
- the substituent is preferably a methyl group, a methoxy group, an amino group, a substituted amino group, or a sulfo group.
- the position of the substituent is not particularly limited, but the p-position relative to the amino group is particularly preferable.
- Xb 21 is a phenylazo group having a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a hydroxy group, a sulfo group, an amino group, and a substituted amino group
- a hydroxy group, an amino group, a methyl group or a methoxy group is preferable, and a hydroxy group is particularly preferable.
- each of Xb 22 and Xb 23 is preferably a hydrogen atom, a methyl group, a methoxy group, an amino group, a substituted amino group or a sulfo group.
- the positions of Xb 22 and Xb 23 are not particularly limited, but in the case where both are not hydrogen atoms, it is particularly preferable that they are 2-position (o-position) and 4-position (p-position) with respect to amino group Preferably, when one is a hydrogen atom, the other is in the 4-position (p-position).
- each of Rb 21 to Rb 26 independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a sulfo group And C 1 -C 4 alkoxy having one or more carbon atoms.
- a hydrogen atom, methyl, ethyl, methoxy, ethoxy, 3-sulfopropoxy or 4-sulfo is preferable. It is preferably a butoxy group, particularly preferably a hydrogen atom, a methyl group, a methoxy group or a 3-sulfopropoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- Rb 21 and Rb 22 pair, Rb 23 and Rb 24 pair, and Rb 25 and Rb 26 pair is not a hydrogen atom, it is possible to form a benzene ring.
- At least one position which is not a hydrogen atom is 2-position only, 5-position only, a combination of 2-position and 6-position, a combination of 2-position and 5-position, or 3-position and 5-position It is preferable that it is a combination of only 2-position, only 5-position, or a combination of 2-position and 5-position.
- the azo compound in which the form of the free acid is represented by the general formula (2-2) or (2-5) for example, JP-A-3-12606, JP-A-5-295281, and International Publication Examples thereof include, but are not limited to, the methods described in, for example, WO 2012/108169 and WO 2012/108173.
- Examples of the azo compound in which the form of the free acid is represented by the general formula (2-2) or (2-5) include: JP-A-3-12606 (Patent No. 2622748), JP-A-5-295281
- Examples are the azo compounds described in the publication, WO 2012/108169, WO 2012/108173, WO 2007/148757 and the like.
- the content of the azo compound in which the form of the free acid is represented by the general formula (2-2) is the content of the azo compound in which the form of the free acid is represented by the general formula (2-1)
- the content is preferably in the range of 10 to 5000 parts by weight, and more preferably in the range of 30 to 3000 parts by weight with respect to 100 parts by weight of the content.
- Ag 21 represents a nitro group or an amino group
- Rg 21 and Rg 22 each independently represent a hydrogen atom, a hydroxy group, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms
- Xg 21 represents an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted alkoxy group having 4 or an sulfo group.
- benzoyl group which may have a substituent selected from the group consisting of amino group, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, sulfo group, amino group and substituted amino group
- the azo compound or the metal complex thereof in which the form of the free acid is represented by the above general formula (2-3) has the following form (2-4):
- optical characteristics such as polarization performance of a polarizing element, further improve.
- Ag 21 , Rg 22 and Xg 21 have the same meanings as described in the general formula (2-3).
- Ag 21 represents a nitro group or an amino group, but when Ag 21 is a nitro group, it is preferable because the performance of the polarizing element is further improved.
- Xg 21 is a group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group Selected from the group consisting of benzoyl group optionally having substituent (s), alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, sulfo group, amino group, and substituted amino group Selected from the group consisting of a benzoylamino group which may have one or more substituents, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group It is selected from the group consisting of a phenylamino group which may have a group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 1 to 4 carbon atoms, an amino group
- a naphthotriazole group is represented, but it may have a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group Most preferred is a good phenylamino group.
- Xg 21 is a naphthotriazole group having a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group
- the substituent is preferably a sulfo group.
- Xg 21 is an alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and may have a substituent group selected from the group consisting of substituted amino group phenylamino group
- the substituent is a methyl group, a methoxy group, an amino group, a substituted amino group, or a phenylamino group having a sulfo group
- the position of the substituent is not particularly limited. Particularly preferred is the p-position to.
- Xg 21 may have a substituent selected from the group consisting of benzoyl group, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, sulfo group, amino group, and substituted amino group Benzoyl group or benzoyl amino group optionally having a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group
- the substituent is preferably an amino group or a substituted amino group, and particularly preferably an amino group.
- the position of the substituent is not particularly limited, but is preferably the p-position to the benzoyl group or the carbonyl group in the benzoylamino group.
- Xg 21 is a phenylazo group which may have a substituent selected from the group consisting of a hydroxy group, a sulfo group, an amino group, and a substituted amino group
- the substituent is a hydroxy group, an amino group, methyl It is preferably a group or a methoxy group.
- Rg 21 in the general formula (2-3) and Rg 22 in the general formula (2-3) or (2-4) are each independently a hydrogen atom, a hydroxy group, an alkyl group having 1 to 4 carbon atoms, carbon And represents an alkoxy group having 1-4 groups or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, but a hydrogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, a 3-sulfopropoxy group, or 4-sulfo group. It is preferably a butoxy group, particularly preferably a hydrogen atom, a methyl group, a methoxy group or a 3-sulfopropoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the metal complex of the azo compound in which the form of the free acid is represented by the general formula (2-3) or (2-4) is, for example, the following general formula (Wherein, Ag 21 , Rg 22 and Xg 21 have the same meaning as described in the general formula (2-3), and M is selected from the group consisting of copper, nickel, zinc and iron) Represents a transition metal) ,as well as (Wherein, Ag 21 , Rg 22 and Xg 21 have the same meaning as described in the general formula (2-3), and M is selected from the group consisting of copper, nickel, zinc and iron) Represents a transition metal) Each is represented by M is preferably copper.
- azo compound in which the form of a free acid is represented by General formula (2-3) or (2-4)
- its metal complex, or its synthesis method For example, Japanese Patent Publication No.2-6, 1988, Unexamined-Japanese-Patent No. 2013-57909 And the like, but the invention is not limited thereto.
- an azo compound or a metal complex thereof in which the form of a free acid is represented by the general formula (2-3) or (2-4)
- the content of the azo compound in which the form of the free acid is represented by the general formula (2-3) or the metal complex thereof is represented by the form of the free acid in the general formula (2-1)
- the amount is preferably in the range of 10 to 2500 parts by weight, and more preferably in the range of 20 to 1500 parts by weight with respect to 100 parts by weight of the azo compound content.
- An azo compound in which the form of the free acid as described above is represented by the general formula (2-1), and an azo compound in which the form of the free acid is represented by the general formula (2-2) or (2-5)
- a polarizing element containing an azo compound of which the form of the free acid is represented by the general formula (2-3) or (2-4) or a metal complex thereof has good polarization characteristics, but the form of the free acid is the above-mentioned general It is more preferable to further include the azo compound represented by the formula (10). This further improves the polarization characteristics of the polarizing element.
- the form of the free acid is the general formula (10)
- the azo compound represented by is as described above.
- the content of the azo compound in which the form of the free acid is represented by the general formula (10) is the content of the azo compound in which the form of the free acid is represented by the general formula (2-1)
- the amount is preferably in the range of 1 to 1000 parts by weight, and more preferably in the range of 5 to 800 parts by weight with respect to 100 parts by weight.
- the azo compound in which the form of free acid is represented by the general formula (2-1);
- the azo compound in which the form of the free acid is represented by General Formula (2-2) and the azo compound in which the form of the free acid is represented by General Formula (2-3) or a metal complex thereof .
- Optical properties and durability are improved.
- a polarizing element according to a third embodiment of the present invention is characterized by including a substrate, and an azo compound of which the form of the free acid is represented by the above general formula (3-1) or a cupric compound thereof.
- the polarizing element of the present embodiment may further include other types of azo compounds, and further includes other types of azo compounds, the polarization performance is improved not only at a specific wavelength but also when converted to visual sensitivity. It can be done.
- the other type of azo compound preferably includes an azo compound in which the form of the free acid is represented by the general formula (3-3).
- an azo compound in which the form of the free acid is represented by the general formula (3-3) is added to the azo compound in which the form of the free acid is represented by the above general formula (3-3), and the azo compound in which the form of the free acid is represented by the above general formula (10) It is preferable to include.
- the azo compound or its copper compound represented by the general formula (3-1) in the form of the free acid, and the azo compound represented by the general formulas (3-3) and (10) in the form of the free acid Most preferably, it is adsorbed to the substrate.
- the azo compound of which the form of the free acid is represented by the above general formula (3-1) or its copper compound is contained in the polarizing element in the form of the free acid which is represented by the above general formula (3-1) It may be contained in the polarizing element in the form of the azo compound represented by the above general formula (3-1) or a salt of its copper compound.
- the azo compounds in which the form of the free acid is represented by the general formulas (3-3) and (10) are contained in the polarizing element in the form of the free acid represented by the general formulas (3-3) and (10) It may be contained in the polarizing element in the form of a salt of the azo compound represented by the general formulas (3-3) and (10).
- the salts include alkali metal salts such as lithium salts, sodium salts and potassium salts; alkaline earth metal salts; ammonium salts; organic salts such as alkylamine salts and alkanolamine salts.
- the salt is preferably a lithium salt, a sodium salt, a potassium salt or an ammonium salt, more preferably a lithium salt or a sodium salt, and still more preferably a sodium salt.
- the azo compound used as a dye in the polarizing element of the present embodiment is generally a known diazotized compound according to a synthesis method (for example, page 626 of Non-patent Document 1) known in the art. It can be manufactured by coupling. The azo compound can be dissolved in a solution, and the substrate can be impregnated in the dyeing step to produce a polarizing element.
- the form of the free acid is represented by the general formula (3-1)
- the azo compound represented by or the cupric compound thereof will be described. Explain.
- Ab 31 represents a substituted phenyl group or a substituted naphthyl group
- Xb 31 and Xb 32 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
- the azo compound of which the form of the free acid is represented by the above general formula (3-1) or its copper compound is the form of the free acid of the following general formula (3-2)
- the polarization performance of the polarizing element is further improved.
- Ab 31 , Xb 31 and Xb 32 have the same meaning as described in the general formula (3-1).
- the form of the free acid is azo compound represented by the general formula (3-1) or (3-2), or the form of the free acid as the cupric compound thereof. It is more preferable to include an azo compound represented by (3-2) and not containing a copper atom.
- the phenyl group has at least one sulfo group or carboxy group as a substituent, and phenyl
- the group has two or more substituents, at least one of the substituents is a sulfo group or a carboxy group, and the other substituent is a sulfo group, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms.
- the alkoxy group is preferably an alkoxy group of 4, an alkoxy group having 1 to 4 carbon atoms having a sulfo group, a carboxy group, a nitro group, an amino group or a substituted amino group, and the substituent on the phenyl group is a sulfo group or a methyl group.
- An ethyl group, a methoxy group, an ethoxy group, a carboxy group, a nitro group or an amino group is more preferable, and a sulfo group, a carboxy group or a methoxy group is more preferable More preferable.
- the C 1-4 alkoxy group having a sulfo group is preferably a C 1-4 linear alkoxy group having a sulfo group, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the C 1-4 alkoxy group having a sulfo group is more preferably a 3-sulfopropoxy group or a 4-sulfobutoxy group, and particularly preferably a 3-sulfopropoxy group.
- the number of substituents on the phenyl or naphthyl group is preferably 2. When the number of substituents on the phenyl group is 2, the substitution position on the phenyl group is not particularly limited, but is preferably a combination of 2-position and 4-position.
- the naphthyl group when Ab 31 is a naphthyl group having a substituent, the naphthyl group preferably has at least one sulfo group as a substituent, and the phenyl group is substituted When it has two or more groups, at least one of the substituents is a sulfo group, and the other substituent is a sulfo group, a hydroxy group, a carboxy group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group. Is preferred.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the C 1-4 alkoxy group having a sulfo group is more preferably a 3-sulfopropoxy group or a 4-sulfobutoxy group, and particularly preferably a 3-sulfopropoxy group.
- the substitution position of the sulfo group is preferably a combination of 4-position and 8-position or a combination of 6-position and 8-position, Particularly preferred is a combination of the 6- and 8-positions.
- the substitution position of the sulfo group is particularly preferably a combination of the 1-position, the 3-position and the 6-position.
- Xb 31 and Xb 32 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a hydroxy group, Represents a carboxy group, a sulfo group, an amino group or a substituted amino group, preferably a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group or an amino group, More preferably, it is a hydrogen atom or a methoxy group.
- substitution position of Xb 31 and Xb 32 is not particularly limited, but when one of Xb 31 and Xb 32 is a hydrogen atom and the other is not a hydrogen atom, the other substitution position which is not a hydrogen atom is p-to the amino group Particular preference is given to
- the process for producing the azo compound of which the form of the free acid is represented by the general formula (3-1) or (3-2) or its cupric compound is described below.
- the azo compound represented by the general formula (3-1) or (3-2) or a copper compound thereof can be produced by the same production method as a known production method.
- the method for producing the azo compound represented by (3-2) or (3-2) or the copper compound thereof is not limited to the method described herein.
- the compound is represented by the above general formula (3-1) or (3-2) by performing known diazotization and coupling according to a conventional method for producing an azo dye as described in Non-Patent Document 1.
- the azo compound or its copper compound can be easily produced.
- the azo compound of which the form of the free acid is represented by the general formula (3-1) or (3-2) or its cupric compound can be produced as follows. First, the following general formula (21) (Wherein, Ab 31 represents the same meaning as described in the general formulas (3-1) and (3-2).) The monoazo amino compound represented by these is obtained.
- the monoazoamino compound represented by the general formula (21) is a compound represented by the following general formula (22) when Ab 31 is a phenyl group having at least one sulfo group or carboxy group.
- one of Rb 31 and Rb 32 represents a sulfo group or a carboxy group, and the other has a sulfo group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a sulfo group
- the sulfoalkoxyaniline acids obtained by sulfoalkylating the aromatic amines represented by the following formula by a known method are diazotized to give the following general formula (23) Obtained by primary coupling with an aniline represented by
- the combinations of substitution positions of two methoxy groups are each independently a combination of 2-position and 6-position, a combination of 2-position and 5-position, or a combination of 3-position and 5-position It is particularly preferable that it is a combination of 2-position and 5-position as in formula (3-2).
- the disazoamino compound represented by the general formula (26) is diazotized by a known method to obtain the following general formula (27) (Wherein, Xb 31 and Xb 32 have the same meanings as described in formulas (3-1) and (3-2).)
- the tertiary coupling with the naphthols represented by the formula (III) gives an azo compound having a free acid form represented by the general formula (3-1) or (3-2) or a cupric compound thereof.
- the diazotization step is carried out according to a conventional method of mixing a nitrite such as sodium nitrite or the like in an aqueous solution or suspension of a mineral acid such as hydrochloric acid or sulfuric acid of the diazo component, or It is carried out by the reverse method of adding nitrite to an alkaline aqueous solution and mixing it with a mineral acid.
- the temperature for diazotization is preferably -10 to 40.degree.
- an acidic aqueous solution such as hydrochloric acid or acetic acid is mixed with each of the above diazo liquids (the aqueous solution or suspension of the diazotized product), and the temperature is ⁇ 10 to 40 ° C. It is carried out under the acid condition of ⁇ 7.
- the monoazo compound, disazo compound, and trisazo compound obtained by the coupling are precipitated as they are or after acid precipitation or salting out, and then they are taken out by filtration or the solution or suspension is carried on to the next step. It can also be done. If the diazonium salt is poorly soluble and in suspension, it can be filtered and used as a presscake in the next coupling step.
- the tertiary coupling reaction of the diazotized disazo amino compound represented by the general formula (26) with the naphthols represented by the general formula (27) is carried out at a temperature of -10 to 40.degree. C. and a pH of 7 to 10. It is carried out under the conditions of nature to alkaline. After completion of the reaction, it is precipitated by salting out and filtered out. In addition, if purification is required, salting out may be repeated or precipitation may be performed from water using an organic solvent. Examples of the organic solvent used for purification include water-soluble organic solvents such as alcohols such as methanol and ethanol, and ketones such as acetone.
- the form of the free acid is azo compound represented by the general formula (3-1) or a starting material (raw material compound) for synthesizing a copper compound thereof
- Rb 31 and Rb 32 of the aromatic amines represented by the formula (22) hydrogen atom, sulfo group, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, carbon having sulfo group
- the alkoxy group includes, but is not limited to, an alkoxy group having 1 to 4 carbon atoms, a carboxy group, a nitro group, an amino group, an acetylamino group, a hydrogen atom, a sulfo group, a carboxy group, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group is preferably a linear alkoxy group having 1 to 4 carbon atoms having a sulfo group, and the substitution position of the sulfo group on the alkoxy group having 1 to 4 carbon atoms is And an alkoxy group terminal is preferable. It is particularly preferable that the alkoxy group having 1 to 4 carbon atoms having a sulfo group is a 3-sulfopropoxy group or a 4-sulfobutoxy group.
- Examples of the aromatic amines represented by the above general formula (22) include 4-aminobenzenesulfonic acid, 3-aminobenzenesulfonic acid, 2-aminobenzenesulfonic acid, 4-aminobenzoic acid, 2-amino- 5-methylbenzenesulfonic acid, 2-amino-5-methoxybenzenesulfonic acid, 4-amino-2-methylbenzenesulfonic acid, 3-amino-4-methoxybenzenesulfonic acid, 2-amino-4-sulfobenzoic acid, 2-amino-5-sulfobenzoic acid, etc., 5-aminoisophthalic acid, 2-amino-5-nitrobenzenesulfonic acid, 5-acetamido-2-aminobenzenesulfonic acid, 2-amino-5- (3-sulfopropoxy) Benzenesulfonic acid, 4-aminobenzene-1,3-disulfonic acid, 2-
- the aromatic amines represented by the general formula (23) may have a naphthotriazole group as a substituent on the phenyl group.
- naphthotriazole groups include 6,8-disulfonaphthotriazole group, 7,9-disulfonaphthotriazole group, 7-sulfonaphthotriazole group, and 5-sulfonaphthotriazole group.
- the substitution position of the naphthotriazole group on the benzene ring is particularly preferably the p-position relative to the amino group.
- Rb 33 of the naphthylamine sulfonic acids represented by the general formula (24) is a hydrogen atom, a sulfo group, a carboxy group, a hydroxy group, a tosylated hydroxy group, an amino group, a substituted amino group, a nitro group, a substituted amido group, Or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, preferably a hydrogen atom, a sulfo group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group is a linear alkoxy group having 1 to 4 carbon atoms having a sulfo group.
- the substitution position of the sulfo group on the alkoxy group having 1 to 4 carbon atoms is preferably at the end of the alkoxy group. It is particularly preferable that the alkoxy group having 1 to 4 carbon atoms having a sulfo group is a 3-sulfopropoxy group or a 4-sulfobutoxy group.
- the substitution position of the sulfo group in the naphthylamine sulfonic acids represented by the general formula (24) may be on any benzene nucleus of the naphthalene ring, but when the number p of sulfo groups is 1, the sulfo group is Is preferably one of the 1-, 3- and 6-positions, and in the case where the number p of sulfo groups is 2 or 3, the combination of the sulfo-group substitution positions is 1- It is preferable that it is a combination of 2 or 3 selected from the group consisting of position, 3-position, 6-position and 7-position.
- naphthylamine sulfonic acids represented by the above general formula (24) include 2-aminonaphthalene-1-sulfonic acid, 8-aminonaphthalene-1-sulfonic acid, 5-aminonaphthalene-1-sulfonic acid, and the like.
- anilines having a methoxy group represented by the general formula (23) or the general formula (25), which are a primary coupling component or a secondary coupling component include, for example, 2,5-dimethoxyaniline, 3,5 -Dimethoxyaniline, 2,6-dimethoxyaniline, but 2,5-dimethoxyaniline is preferred.
- Xb 31 and Xb 32 of the naphthols represented by the general formula (27), which are tertiary coupling components, are each independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy having 1 to 4 carbon atoms
- Group represents a group, a hydroxy group, a carboxy group, a sulfo group, an amino group, or a substituted amino group, preferably a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms; More preferably, it is an atom or a methoxy group.
- substitution position of Xb 31 and Xb 32 is not particularly limited, but when one of Xb 31 and Xb 32 is a hydrogen atom and the other is not a hydrogen atom, the other substitution position which is not a hydrogen atom is p-to the amino group Particular preference is given to
- an azo compound such as an azo compound of which the form of the free acid is represented by the general formula (3-1) or a copper compound thereof is obtained by a coupling reaction
- the azo compound is liberated by the addition of a mineral acid after the coupling reaction. It can be isolated in the form of acid and the inorganic salts can be removed from the isolate by washing with water or acidified water.
- the azo compounds in the form of free acids, such as azo compounds in the form of free acids having a low salt content (acid type azo compounds) etc. obtained in this way are then obtained in aqueous medium as the desired inorganic or organic compounds.
- the corresponding salts can be made into solutions by neutralization with a base of Alternatively, during salting-out after the coupling reaction, for example, sodium chloride or the like can be used to form a sodium salt, for example, potassium chloride can be used to form a potassium salt, and thus the desired salt is formed.
- the copper compound (copper complex compound) of the azo compound in which the form of the free acid is represented by the general formula (3-1) is, for example, copper sulfate with the azo compound in which the form of the free acid is represented by the general formula (3-1) Can be obtained by treating with
- azo compound of which the form of the free acid is represented by the general formula (3-1) or (3-2) or a cupric compound thereof are given below.
- the sulfo group and the carboxy group are represented in the form of a free acid, but the sulfo group and the carboxy group may be in the form of a salt.
- each of Rr 31 to Rr 36 independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, but a hydrogen atom or carbon atoms It is preferably an alkyl group of 1 to 4, and more preferably a hydrogen atom or a methyl group.
- Xr 31 represents a hydrogen atom or an amino group, but is preferably an amino group in order to improve the polarization characteristics of the polarizing element.
- Ar 31 represents a phenyl group having a substituent or a naphthyl group having a substituent.
- the substituent on the phenyl group is sulfo group, carboxy group, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, hydroxy group, alkoxy group having 1 to 4 carbon atoms having sulfo group, sulfo substitution
- the naphthotriazole group, the nitro group, the amino group or the substituted amino group is preferred.
- the substituent on the naphthyl group is preferably a sulfo group, a hydroxy group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group.
- Ar 31 is preferably a phenyl group or a naphthyl group having one or more sulfo groups or carboxy groups, and in order to improve the durability of the polarizing element, a phenyl group having two or more sulfo groups or carboxy groups or It is more preferable that it is a naphthyl group.
- Ar 31 is more preferably a phenyl group having a sulfo group or a carboxy group in order to further improve the polarization characteristics of the polarization element and to produce a neutral-color polarization element.
- m3 and n3 each independently represent 0 or 1, but in order to obtain good polarization performance, it is preferable that at least one of m3 and n3 be 1, and m3 and n3 Preferably both are one.
- the substituted amino group is not particularly limited, and includes, for example, an alkyl group having 1 to 4 carbon atoms or an amino group substituted with an acyl group.
- Examples of the method for synthesizing the azo compound in which the form of the free acid is represented by the general formula (3-3) include, for example, JP-A-9-302250, JP-A-46262853 and JP-A-4162334, and International Publication 2012 Examples thereof include, but are not limited to, the methods described in JP-A-108169 and WO 2012/108173.
- Examples of the azo compound in which the form of the free acid is represented by General Formula (3-3) include C.I. I. Direct Red 81, C.I. I. Direct Red 117, C.I. I. Direct Red 127, dyes described in Japanese Patent No. 4662853, dyes described in Japanese Patent No. 4162334, dyes described in International Publication No. WO 2013/008735, and the like can be used. It is not limited to these.
- specific examples of the azo compound in which the form of the free acid is represented by the general formula (3-3) include the aforementioned compound examples 1 to 34, and the following compound examples.
- the sulfo group and the hydroxy group are represented in the form of free acid, but the sulfo group and the hydroxy group may be in the form of a salt.
- the content of the azo compound in which the form of the free acid is represented by General Formula (3-3) is the azo compound in which the form of the free acid is represented by General Formula (3-1) or
- the content is preferably in the range of 10 to 6000 parts by weight, and more preferably in the range of 20 to 5000 parts by weight with respect to 100 parts by weight of the content of the copper compound.
- the form of the free acid is the general formula (10)
- the azo compound represented by is as described above.
- the content of the azo compound in which the form of the free acid is represented by the general formula (10) is the azo compound in which the form of the free acid is represented by the general formula (3-1) or copper thereof
- the amount is preferably in the range of 10 to 1000 parts by weight, and more preferably in the range of 20 to 500 parts by weight with respect to 100 parts by weight of the fluoride content.
- the azo compound in which the form of the free acid is represented by the general formula (3-1) as the azo compound or copper thereof
- the optical properties and the durability are improved.
- a polarizing element according to a fourth embodiment of the present invention comprises a substrate, an azo compound represented by the general formula (2-1) or a salt thereof, and an azo represented by the general formula (4-2). And the compound or a salt thereof.
- the polarizing element of the present embodiment is an azo compound represented by the general formula (10) or It is preferred to include a salt. Thereby, a polarization element having a still higher degree of polarization can be realized.
- the azo compounds represented by the general formulas (2-1), (4-2) and (10) or salts thereof are preferably adsorbed to the substrate.
- the azo compounds represented by the general formulas (2-1), (4-2) and (10) or the salts thereof are freed represented by the general formulas (2-1), (4-2) and (10) It may be contained in the polarizing element in the form of an acid, and it may be contained in the polarizing element in the form of a salt of the azo compound represented by the general formulas (2-1), (4-2), (10) Good.
- the salts may be alkali metal salts such as lithium salts, sodium salts and potassium salts, and may be organic salts such as ammonium salts and alkylamine salts.
- the salt is preferably a lithium salt or a sodium salt, more preferably a sodium salt.
- the azo compound used as a dye in the polarizing element of the present embodiment is generally a known diazotized compound according to a synthesis method (for example, page 626 of Non-patent Document 1) known in the art. It can be manufactured by coupling. The azo compound can be dissolved in a solution, and the substrate can be impregnated in the dyeing step to produce a polarizing element.
- Ab 41 represents a phenyl group having a substituent or a naphthyl group having a substituent
- R b 41 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms Or an alkoxy group having 1 to 4 carbon atoms having a sulfo group
- Xb 41 represents an amino group which may have a substituent, a benzoyl group which may have a substituent, or a substituent
- a phenylazo group which may have
- the azo compound represented by the above general formula (4-2) or a salt thereof is a compound represented by the following general formula (4-3)
- the polarization performance of a polarizing element can further be improved.
- Ab 41 , Rb 41 and Xb 41 have the same meanings as described in the general formula (4-2).
- the phenyl group has at least one sulfo group or carbonyl group as a substituent.
- the substituents is a sulfo group or a carbonyl group
- the other substituents are a sulfo group, an alkyl group having 1 to 4 carbon atoms, and a carbon number
- It is preferably an alkoxy group of 1 to 4, an alkoxy group having 1 to 4 carbon atoms having a sulfo group, a carboxy group, a nitro group, an amino group or a substituted amino group
- the substituent on the phenyl group is a sulfo group, More preferably a methyl group, an ethyl group, a methoxy group, an ethoxy group, a carboxy group, a nitro group or
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the C 1-4 alkoxy group having a sulfo group is more preferably a 3-sulfopropoxy group or a 4-sulfobutoxy group, and particularly preferably a 3-sulfopropoxy group.
- the number of substituents on the phenyl group or the naphthyl group is preferably 2, and the substitution position on the phenyl group is not particularly limited, but is preferably a combination of 2-position and 4-position.
- Xb 41 may have a substituted amino group (may have a substituent other than a phenyl group and a benzoyl group)
- Xb 41 is an amino group having a substituent other than a phenyl group and a benzoyl group, a phenylamino group having a substituent, a benzoyl group having a substituent, a benzoylamino group having a substituent, or a phenylazo group having a substituent
- the substituent is preferably an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a hydroxy group, a carboxy group, a sulfo group, an amino group or a substituted amino group.
- Xb 41 is an amino group having a substituent other than a phenyl group and a benzoyl group, the substituent is preferably a methyl group, a methoxy group, an amino group, a substituted amino group or a sulfo group.
- Xb 41 is a phenylamino group which may have a substituent, it has a substituent selected from the group consisting of a methyl group, a methoxy group, an amino group, a substituted amino group, and a sulfo group.
- Xb 41 is a benzoyl group or a benzoylamino group which may have a substituent
- benzoyl group which may have a substituent selected from the group consisting of an amino group, a substituted amino group, and a hydroxy group
- it is a benzoylamino group which may have a substituent selected from the group consisting of an amino group, a substituted amino group and a hydroxy group
- Particularly preferred is an amino group, and the position of the substituent is not particularly limited, but is particularly preferably p-position to a carbonyl group.
- Xb 41 is a phenylazo group which may have a substituent, it may have a substituent selected from the group consisting of a hydroxy group, an amino group, a methyl group, a methoxy group and a carboxy group It is preferably a phenylazo group, and particularly preferably a phenylazo group having a hydroxy group.
- Rb 41 is a methoxy group Is preferred.
- the azo compound represented by the above general formula (4-2) or (4-3) or a salt thereof can be produced, for example, by a method of producing a common azo dye as described in Non-Patent Document 1, JP-B-64-5623. It can manufacture easily by the manufacturing method which performs well-known diazotization, coupling, and copper complex chlorination using copper sulfate which are described in the patent publication etc.
- the process for producing the azo compound represented by the general formula (4-2) or a salt thereof can be realized by many other known methods, and is not limited to the above-mentioned method.
- azo compound represented by the general formula (4-2) or (4-3) or a salt thereof are given below.
- the sulfo group and the hydroxyl group are represented in the form of free acid, but the sulfo group and the hydroxyl group may be in the form of a salt.
- the content of the azo compound represented by the general formula (4-2) or the salt thereof is the content of the azo compound represented by the general formula (2-1) or the salt thereof 100
- the amount is preferably in the range of 1 to 3000 parts by weight, and more preferably in the range of 10 to 2000 parts by weight with respect to the parts by weight.
- the form of the free acid is the general formula (10)
- the azo compound represented by is as described above.
- the content of the azo compound represented by the general formula (10) or a salt thereof is 100 parts by weight of the content of the azo compound represented by the general formula (2-1) or a salt thereof Preferably, it is in the range of 1 to 1000 parts by weight, and more preferably in the range of 10 to 500 parts by weight.
- the azo compound represented by the general formula (2-1) or the salt thereof as the azo compound and the general formula improves optical properties and durability.
- a polarizing element according to a fifth embodiment of the present invention comprises a substrate, an azo compound of which the form of free acid is represented by the above general formula (5-1), and a form of the free acid of the above general formula (5-). It contains an azo compound represented by 2) or a metal complex thereof.
- the azo compound in which the form of the free acid is represented by the general formula (5-1) and the azo compound in which the form of the free acid is represented by the general formula (5-2) or a metal complex thereof In addition to the above, it is preferable that the form of the free acid contains an azo compound represented by the above general formula (10).
- An azo compound in which the form of the free acid is represented by the above general formulas (5-1) and (10), and an azo compound in which the form of the free acid is represented by the above general formula (5-2)
- it is adsorbed to the substrate.
- the azo compounds in which the form of the free acid is represented by the general formulas (5-1) and (10) are contained in the polarizing element in the form of the free acid represented by the general formulas (5-1) and (10). It may be contained in the polarizing element in the form of a salt of the azo compound represented by the general formulas (5-1) and (10).
- the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (5-2) is contained in the polarizing element in the form of the free acid represented by the general formula (5-2) It may be contained in the polarizing element in the form of the azo compound represented by the general formula (5-2) or a salt of the metal complex thereof.
- the salts include alkali metal salts such as lithium salts, sodium salts and potassium salts; alkaline earth metal salts; ammonium salts; organic salts such as alkylamine salts and alkanolamine salts.
- the salt is preferably a lithium salt, a sodium salt, a potassium salt or an ammonium salt, more preferably a lithium salt or a sodium salt, and still more preferably a sodium salt.
- the azo compound used as a dye in the polarizing element of the present embodiment is generally a known diazotized compound according to a synthesis method (for example, page 626 of Non-patent Document 1) known in the art. It can be manufactured by coupling. The azo compound can be dissolved in a solution, and the substrate can be impregnated in the dyeing step to produce a polarizing element.
- each of Rr 51 to Rr 54 independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a carbon number 1 to 4 having a sulfo group.
- R r 55 and R r 56 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
- Each of R r 51 to R r 54 independently is preferably a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a methoxy group, more preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, hydrogen Particularly preferred is an atom or a methyl group.
- Each of R r 55 and R r 56 is preferably independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and particularly preferably a hydrogen atom or a methyl group. Further, m5 and n5 each independently represent 0 or 1.
- Xr 51 represents a hydrogen atom or an amino group, but when m5 and n5 are 0, it is preferable that Xr 51 is an amino group, and when at least one of m5 and n5 is 1, the polarizing property is Preferably, Xr 51 is an amino group for the purpose of improvement. On the other hand, it may be preferable that Xr 51 be a hydrogen atom in color adjustment of intermediate colors and the like.
- Ar 51 represents a substituted phenyl group or a substituted naphthyl group.
- the substituent on the phenyl group is sulfo group, carboxy group, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, hydroxy group, alkoxy group having 1 to 4 carbon atoms having sulfo group, sulfo substitution
- the naphthotriazole group, the nitro group, the amino group or the substituted amino group is preferred.
- the substituent on the naphthyl group is preferably a sulfo group, a hydroxy group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group.
- Ar 51 is preferably a phenyl group or a naphthyl group having one or more sulfo groups or carboxy groups, and is a phenyl group or a naphthyl group having two or more sulfo groups or carboxy groups in order to improve the durability. Is more preferred. Ar 51 is more preferably a phenyl group having a sulfo group or a carboxy group in order to improve polarization characteristics and to produce a neutral-polarizing element.
- M5 and n5 in the general formula (5-1) may independently be 0 or 1, but at least one of m5 and n5 is 1 in order to obtain good polarization performance in the polarizing element of this embodiment. Is preferred, and it is more preferred that both m5 and n5 be 1.
- the substituted amino group is not particularly limited, and includes, for example, an alkyl group having 1 to 4 carbon atoms or an amino group substituted with an acyl group.
- the azo compound in which the form of the free acid is represented by the general formula (5-1) for example, JP-A-9-302250, Patent No. 4662853, International Publication No. 2012/108169, International Publication Although the method described in 2012/108173 etc. is mentioned, it is not limited to these.
- Examples of the azo compound in which the form of the free acid is represented by General Formula (5-1) include C.I. I. Direct Red 117, C.I. I. Direct Red 127, azo compounds described in formulas (2) to (7) of patent No. 4662853; formulas (2) and formulas (4) to (8) of patent No. 4452237
- Examples include azo compounds and azo compounds described in Formula (14), Formula (21), Formula (47) and the like of WO 2012/108169.
- specific examples of the azo compound in which the form of the free acid is represented by the general formula (5-1) include the aforementioned compound examples 3 to 6 and compound examples 8 to 34, and the following compound examples. .
- a sulfo group, a carboxy group and a hydroxy group are represented in the form of free acid, but the sulfo group, the carboxy group and the hydroxy group may be in the form of a salt.
- Ab 51 represents a phenyl group having a substituent or a naphthyl group having a substituent
- Rb 51 to Rb 53 each independently represent a hydrogen atom or an alkyl having 1 to 4 carbon atoms.
- Xb 51 represents a hydroxy group, an alkyl group having 1 to 4 carbon atoms, or an alkoxy having 1 to 4 carbon atoms Group optionally having a substituent selected from the group consisting of a group, a sulfo group, an amino group, and a substituted amino group, a benzoyl group, a hydroxy group, an alkyl group having 1 to 4 carbon atoms, an alkoxy having 1 to 4 carbon atoms Group having one or more substituents selected from the group consisting of a sulfo group, an amino group, and a substituted amino group, or a hydroxy group, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms Alkoxy group, a sulfo group, an amino group, and may have a substituent group selected from the group consisting
- the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (5-2) has the form of the free acid represented by the following general formula (5-4)
- optical characteristics such as polarization performance of a polarizing element, further improve.
- Ab 51 , Rb 51 to Rb 53 , Xb 51 , and t5 in the general formula (5-4) have the same meaning as in the formula (5-2).
- each of R b 51 to R b 53 is independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or 1 to 4 carbon atoms, as in the general formula (5-2) Or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, preferably a hydrogen atom, a methyl group, an ethyl group, a methoxy group or an ethoxy group. Further, as the alkoxy group having 1 to 4 carbon atoms having a sulfo group, a linear alkoxy group having 1 to 4 carbon atoms having a sulfo group is preferable.
- the substitution position of the sulfo group on the alkoxy group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable.
- R b 51 to R b 53 each independently represent a hydrogen atom, a methyl group, a methoxy group or a 3-sulfopropoxy group.
- the form of the free acid is represented by the general formula (5-2) or (5-4)
- the form of the free acid is represented by the general formula (5-2) or (5-4)
- -O-MO- where M is copper, nickel, zinc And a transition metal selected from the group consisting of iron
- the metal complexes of the azo compounds in which the form of the free acid is represented by the general formulas (5-2) and (5-4) respectively have the following general formulas (Wherein, Ab 51 , Rb 51 to Rb 53 , Xb 51 , and t 5 have the same meaning as described in the general formula (5-2), and M is composed of copper, nickel, zinc, and iron) Represents a transition metal selected from the group) ,as well as (Wherein, Ab 51 , Rb 51 to Rb 53 , Xb 51 , and t 5 have the same meaning as described in the general formula (5-2), and M is composed of copper, nickel, zinc, and iron) Represents a transition metal selected from the group) Is represented by M is preferably copper.
- Examples of the azo compound of which the form of the free acid is represented by the general formula (5-2) or (5-4) or a metal complex thereof or a synthesis method thereof include, for example, JP-A-10-259311 and JP-A-3361238. Examples thereof include compounds and synthesis methods described in JP-A-2007-314616, but the present invention is not limited to the compounds and synthesis methods described therein.
- a sulfo group, a carboxy group and a hydroxy group are represented in the form of free acid, but the sulfo group, the carboxy group and the hydroxy group may be in the form of a salt.
- the content of the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (5-2) is such that the form of the free acid is represented by the general formula (5-1)
- the amount is preferably in the range of 10 to 5000 parts by weight, and more preferably in the range of 30 to 4000 parts by weight with respect to 100 parts by weight of the azo compound.
- the form of the free acid is the general formula (10)
- the azo compound represented by is as described above.
- the content of the azo compound in which the form of the free acid is represented by the general formula (10) is the content of the azo compound in which the form of the free acid is represented by the general formula (5-1) It is preferably in the range of 10 to 2000 parts by weight with respect to 100 parts by weight, and more preferably in the range of 30 to 1000 parts by weight.
- the azo compound having the form of a free acid as the azo compound represented by the general formula (5-1) and the free acid Optical properties and durability are improved by using the azo compound represented by the general formula (5-2) or the metal complex thereof.
- a polarizing element according to a sixth embodiment of the present invention comprises a substrate, an azo compound of which the form of free acid is represented by the general formula (6-1), and a form of the free acid of the general formula (6- It contains an azo compound represented by 2) or a metal complex thereof.
- the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (6-2) is the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (6-4)
- a polarization element having a higher degree of polarization can be realized.
- the azo compound in which the form of the free acid is represented by the general formula (6-1) and the azo compound in which the form of the free acid is represented by the general formula (6-2) or a metal thereof
- the form of the free acid contains the azo compound represented by the general formula (10)
- a polarizing element having a still higher degree of polarization can be realized.
- the azo compound in which the form of the free acid is represented by the general formula (6-1) and the azo compound in which the form of the free acid is represented by the general formula (6-2)
- the form of the free acid includes the azo compound represented by the general formula (10) in addition to the metal complex, particularly the form of the free acid is represented by the general formulas (10) and (6-5)
- both of the azo compounds are contained, it is possible to realize a polarizing element having a higher degree of polarization.
- the azo compound in which the form of the free acid is represented by the general formula (6-5) is an azo compound represented by the general formula (6-6)
- polarized light having a higher degree of polarization A device can be realized.
- the azo compounds in which the form of the free acid is represented by the general formulas (6-1), (10) and (6-5) can be obtained by the general formulas (6-1), (10) and (6-5) It may be contained in the polarizing element in the form of the free acid represented, and may be contained in the form of a salt of the azo compound represented by the general formulas (6-1), (10), (6-5). It may be included.
- the azo compound or the metal complex thereof in which the form of the free acid is represented by the general formula (6-2) is contained in the polarizing element in the form of the free acid represented by the general formula (6-2) It may be contained in the polarizing element in the form of the azo compound represented by the above general formula (6-2) or a salt of the metal complex thereof.
- the salts include alkali metal salts such as lithium salts, sodium salts and potassium salts; alkaline earth metal salts; ammonium salts; organic salts such as alkylamine salts and alkanolamine salts.
- the salt is preferably a lithium salt, a sodium salt, a potassium salt or an ammonium salt, more preferably a lithium salt or a sodium salt, and still more preferably a sodium salt.
- the azo compound used as a dye in the polarizing element of the present embodiment is generally a known diazotized compound in accordance with a synthesis method (for example, page 626 of Non-patent Document 1) known in the art. It can be synthesized by coupling.
- the azo compound can be dissolved in a solution, and the substrate can be impregnated in the dyeing step to produce a polarizing element.
- Ar 61 represents a phenyl group having a substituent or a naphthyl group having a substituent
- R r 61 to R r 66 each independently represent a hydrogen atom or an alkyl having 1 to 4 carbon atoms Group, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group
- Xr 61 represents a hydrogen atom, an amino group, or a substituted amino group
- m6 and n6 are each independently And when m6 and n6 are 1, each of R r 65 and R r 66 independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a sulfo group having 1 to 4 carbon atoms. Represents an alkoxy group.
- Ar 61 represents a phenyl group having a substituent or a naphthyl group having a substituent, but when Ar 61 is a phenyl group having a substituent, the phenyl group is at least a sulfo group or a carboxy group as a substituent It is preferable to have one, and when the phenyl group has two or more substituents, at least one of the substituents is a sulfo group or a carboxy group, and the other substituent is a sulfo group, a carboxy group, An alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms having a sulfo group, a nitro group, an amino group, or a substituted amino group (in particular, an acetylamino group or carbon number 1 to 4 alkylamino group) is preferable, and the other substituent is preferably
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the number of substituents on the phenyl group is preferably 1 or 2, and the position of the substituent on the phenyl group is not particularly limited, but may be only 4-position or a combination of 2-position and 4-position Preferably, it is a combination of 3-position and 5-position.
- Ar 61 is a substituted naphthyl group
- the naphthyl group have at least one sulfo group as a substituent, and when the naphthyl group has two or more substituents, these substituents
- at least one of the groups is a sulfo group
- the other substituent is a sulfo group, a hydroxy group, a carboxy group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group.
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the position of the sulfo group is preferably a combination of 4-position and 8-position or a combination of 6-position and 8-position, and the 6-position Particularly preferred is a combination of the and 8-positions.
- the position of those sulfo groups is particularly preferably a combination of 1-position, 3-position and 6-position.
- Xr 61 represents a hydrogen atom, an amino group or a substituted amino group, preferably a hydrogen atom or an amino group, and particularly preferably an amino group in order to improve the polarization performance of the polarizing element.
- R r 61 to R r 66 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group; It is preferably an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably a hydrogen atom, a methyl group or a methoxy group. Further, as the alkoxy group having 1 to 4 carbon atoms having a sulfo group, a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- m6 and n6 may be each independently 0 or 1, but in order to obtain good polarization performance in the polarizing element of this embodiment, when one of m6 and n6 is 0, the other is 1 preferable.
- Rr 65 and Rr 66 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkyl group having 1 to 4 carbon atoms, in order to exhibit the desired performance of the polarizing element of the present invention. It is necessary that the alkoxy group has 1 to 4 carbon atoms having a sulfo group, and is preferably a hydrogen atom or a methyl group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group is preferably an alkoxy group having 3 to 4 carbon atoms having a sulfo group, and particularly preferably an alkoxy group having 3 carbon atoms having a sulfo group.
- the substituted amino group is not particularly limited, and examples thereof include an amino group substituted with an alkyl group having 1 to 4 carbon atoms, and an amino group substituted with an acyl group.
- Examples of the method for synthesizing the azo compound in which the form of the free acid is represented by the general formula (6-1) include, for example, JP-A-09-302250, JP-A-4452237, JP-A-4662853 and International Publication 2012 Examples include, but are not limited to, the methods described in JP-A-108169.
- Examples of the azo compound in which the form of the free acid is represented by General Formula (6-1) include C.I. I. Direct Red 117, C.I. I. Direct Red 127, an azo compound described in Japanese Patent No. 4662853, an azo compound described in Japanese Patent No. 4452237, compound examples (14), (21), (a compound of WO 2012-108169) 47) and the like.
- Ag 61 represents a phenyl group having a substituent or a naphthyl group having a substituent
- Rg 61 to Rg 63 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- h 6 represents an integer of 1 to 3.
- h6 may be an integer of 1 to 3, it is preferably 2 to improve the polarization performance.
- Ag 61 represents a phenyl group having a substituent or a naphthyl group having a substituent, but when Ag 61 is a phenyl group having a substituent, the phenyl group is at least a sulfo group or a carboxy group as a substituent It is preferable to have one, and when the phenyl group has two or more substituents, at least one of the substituents is a sulfo group or a carboxy group, and the other substituent is a sulfo group, a carboxy group, An alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms having a sulfo group, a nitro group, an amino group, or a substituted amino group (in particular, an acetylamino group or carbon number 1 to 4 alkylamino group) is preferable, and the other substituent is preferably
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the number of substituents on the phenyl group is preferably 1 or 2, and the position of the substituent on the phenyl group is not particularly limited, but may be only 4-position or a combination of 2-position and 4-position Preferably, it is a combination of 3-position and 5-position.
- the naphthyl group has at least one sulfo group as a substituent, and when the naphthyl group has two or more substituents, the substituents thereof
- at least one of the groups is a sulfo group
- the other substituent is a sulfo group, a hydroxy group, a carboxy group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group.
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the position of the sulfo group is preferably a combination of 4-position and 8-position or a combination of 6-position and 8-position, and the 6-position Particularly preferred is a combination of the and 8-positions.
- the position of those sulfo groups is particularly preferably a combination of 1-position, 3-position and 6-position.
- Rg 61 to Rg 63 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group; It is preferably an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably a hydrogen atom, a methyl group or a methoxy group. Further, as the alkoxy group having 1 to 4 carbon atoms having a sulfo group, a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the metal complex of the azo compound in which the form of the free acid is represented by General Formula (6-2) has a hydroxy group bonded to the naphthalene ring in the azo compound in which the form of the free acid is represented by General Formula (6-2) Together with the methoxy group bound to the benzene ring closest to the naphthalene ring, the bond of -O-MO- (M represents a transition metal such as copper, cobalt, nickel, zinc, iron, etc.)
- M represents a transition metal such as copper, cobalt, nickel, zinc, iron, etc.
- the compound that formed That is, the metal complex of the azo compound in which the form of the free acid is represented by the general formula (6-2) has the following general formula (Wherein, Ab 61 , Rb 61 to Rb 63 , Xb 61 and t have the same meaning as described in the general formula (6-2), and M is copper, cobalt, nickel, zinc, iron, etc. Represents the transition metal of Is
- the azo compound or the metal complex thereof in which the form of the free acid is represented by the above general formula (6-2) is a compound represented by the following general formula (6-4)
- the polarization performance of the polarizing element is further improved.
- Ag 61 , Rg 61 to Rg 63 and h6 have the same meaning as described in the general formula (6-2).
- the amount is preferably in the range of 10 to 3000 parts by weight, and more preferably in the range of 20 to 2000 parts by weight with respect to 100 parts by weight of the azo compound content.
- a book comprising an azo compound in which the form of the free acid as described above is represented by General Formula (6-1), and an azo compound in which the form of the free acid is represented by General Formula (6-2) or a metal complex thereof
- the polarizing element of the embodiment has good polarization properties, but it is preferable if the form of the free acid further includes the compound represented by the general formula (10), because the polarization properties are improved.
- the form of the free acid is the general formula (10)
- the azo compound represented by is as described above.
- the content of the azo compound in which the form of the free acid is represented by the general formula (10) is the content of the azo compound in which the form of the free acid is represented by the general formula (6-1)
- the amount is preferably in the range of 1 to 1000 parts by weight, and more preferably in the range of 10 to 700 parts by weight with respect to 100 parts by weight.
- An azo compound in which the form of the free acid as described above is represented by the general formula (6-1), and an azo compound in which the form of the free acid is represented by the general formula (6-2) or (6-4)
- a modified element containing a metal complex, in particular, a polarizing element further containing an azo compound in which the form of the free acid is represented by the general formula (10) in addition to them, has good polarization characteristics but the form of the free acid
- the case where the compound represented by General Formula (6-5) is further contained is further preferable because the polarization properties of the polarizing element are improved.
- Ab 61 represents a substituted phenyl group or a substituted naphthyl group
- Rb 61 to Rb 66 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- Xb 61 represents an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group
- a phenylazo group which may have a substituent selected from the group consisting of and hydroxy group
- t represents 0 or 1.
- Ab 61 represents a phenyl group having a substituent or a naphthyl group having a substituent, but when Ab 61 is a phenyl group having a substituent, the phenyl group is at least a sulfo group or a carboxy group as a substituent It is preferable to have one, and when the phenyl group has two or more substituents, at least one of the substituents is a sulfo group or a carboxy group, and the other substituent is a sulfo group, a carboxy group, An alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms having a sulfo group, a nitro group, an amino group, or a substituted amino group (in particular, an acetylamino group or carbon number 1 to 4 alkylamino group) is preferable, and the other substituent is preferably
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the number of substituents on the phenyl group is preferably 1 or 2, and the position of the substituent on the phenyl group is not particularly limited, but may be only 4-position or a combination of 2-position and 4-position Preferably, it is a combination of 3-position and 5-position.
- the naphthyl group have at least one sulfo group as a substituent, and when the naphthyl group has two or more substituents, these substituents
- at least one of the groups is a sulfo group
- the other substituent is a sulfo group, a hydroxy group, a carboxy group, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group.
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- the alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the position of the sulfo group is preferably a combination of 4-position and 8-position or a combination of 6-position and 8-position, and the 6-position Particularly preferred is a combination of the and 8-positions.
- the position of those sulfo groups is particularly preferably a combination of 1-position, 3-position and 6-position.
- Xb 61 is a phenylamino group optionally having a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, an amino group, and a substituted amino group Or a phenylazo group which may have a substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfo group, and a hydroxy group.
- the substituent is particularly preferably a methyl group, a methoxy group, a sulfo group or an amino group.
- the position of the substituent is not particularly limited, but it is particularly preferable that one of them is p-position to an amino group or an azo group.
- R b 61 to R b 66 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms having a sulfo group, It is preferably an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably a hydrogen atom, a methyl group or a methoxy group. Further, as the alkoxy group having 1 to 4 carbon atoms having a sulfo group, a straight chain alkoxy group is preferable, and the substitution position of the sulfo group is preferably at the end of the alkoxy group.
- alkoxy group having 1 to 4 carbon atoms having a sulfo group a 3-sulfopropoxy group or a 4-sulfobutoxy group is more preferable, and a 3-sulfopropoxy group is particularly preferable.
- the azo compound in which the form of the free acid is represented by the general formula (6-5) is a compound represented by the following general formula (6-6)
- the polarization performance of the polarizing element is improved.
- Ab 61 , Rb 61 to Rb 66 and t have the same meanings as described in the general formula (6-5)
- Xb 62 and Xb 63 are each independently.
- Each of Xb 62 and Xb 63 is preferably independently a hydrogen atom, a methyl group, a methoxy group, an amino group or a sulfo group.
- the substitution position of at least one of them is not particularly limited, but it is particularly preferable that at least one is at the p-position relative to the amino group.
- Examples of the method for synthesizing the azo compound in which the form of the free acid is represented by the general formula (6-5) include, for example, JP-A-3-12606, JP-A-5-295281 and WO 2012/108169. Although it can produce by the method described in WO 2012/108173 etc., it is not limited to these. As such azo, for example, azo compounds described in JP-A-3-12606, JP-A-5-295281, WO 2012/108169, WO 2012/108173, etc. are exemplified. Be done.
- azo compound in which the form of the free acid is represented by the general formula (6-5) or (6-6) include the compound examples 67 to 73, 75, 77 to 92, 94, 96 described above. 110 to 113 and 115 to 120 can be mentioned.
- the content of the azo compound in which the form of the free acid is represented by the general formula (6-5) is the content of the azo compound in which the form of the free acid is represented by the general formula (6-1)
- the content is preferably in the range of 1 to 3000 parts by weight, and more preferably in the range of 5 to 2000 parts by weight with respect to 100 parts by weight of the content.
- an azo compound in which the form of free acid is represented by the general formula (6-1);
- the use of the azo compound in which the form of the free acid is represented by the general formula (6-2) or the metal complex thereof improves the optical properties and the durability.
- an azo compound of which the form of the free acid is represented by the general formulas (1), (10) or the like according to color adjustment etc. and its organic compounds other than copper and metal complexes Azo compounds for example, one or more of the azo compounds described in Non-Patent Document 2, etc. may be used in combination with the azo compound of which the form of the free acid is represented by the general formula (1) and its copper compound and metal complex.
- organic dyes to be used in combination are, but not limited to, dyes for dyeing hydrophilic polymers, and absorption of the azo compound whose free acid form is represented by the general formula (1) and its copper compound and metal complex A dye having absorption characteristics in a wavelength range different from the wavelength range and having high dichroism is preferable.
- organic dyes for example, azo compounds described in Non-Patent Document 2 (for example, CI Direct Yellow 28), C.I. I. Direct Red 2, C.I. I. Direct red 31, C.I. I. Direct Red 79, C.I. I. Direct Red 247, C.I. I. Direct green 80, C.I. I. Direct green 59, C.I. I. Direct Blue 202, C.I. I.
- Azo compounds such as Direct Violet 9 may be mentioned. These azo compounds are used in the form of free acid or in the form of salts such as alkali metal salts (eg, sodium salt, potassium salt, lithium salt), ammonium salts, salts of amines.
- alkali metal salts eg, sodium salt, potassium salt, lithium salt
- ammonium salts salts of amines.
- the target polarizing element is a more neutral polarizing element, a polarizing element having a distinctive color, a color polarizing element for liquid crystal projector, and other color polarizing elements
- the type of other organic dyes to be blended differs depending on which of There are no particular limitations on the blending amounts of the other organic dyes (in the case of two or more, their combined blending amounts), but in general, the form of the free acid is represented by the general formulas (1) and (10 It is preferably in the range of 0.01 to 1000 parts by weight, and more preferably in the range of 0.1 to 1000 parts by weight, based on 100 parts by weight of the azo compound represented by Is more preferable, and the range of 0.01 to 10 parts by weight is more preferable, and the range of 0.1 to 10 parts by weight is even more preferable.
- hydrophilic polymer As a base material which comprises the polarizing element of this invention, hydrophilic polymer is preferable.
- the hydrophilic polymer is not particularly limited, and examples thereof include polyvinyl alcohol or a derivative thereof, an amylose resin, a starch resin, a cellulose resin, and a polyacrylate resin.
- polyvinyl alcohol or a derivative thereof As a base material containing the azo compound of the present invention, polyvinyl alcohol or a derivative thereof (hereinafter referred to as "polyvinyl alcohol resin”) is most preferable in view of dyeability and crosslinkability.
- the polarizing element of the present invention can be produced by adsorbing the azo compound of the present invention and other compounds of the present invention to a film-shaped substrate and applying an orientation treatment such as stretching, with the substrate having a film shape.
- polyvinyl alcohol-type resin A well-known manufacturing method is employable.
- a manufacturing method of polyvinyl alcohol-type resin it can obtain by saponifying polyvinyl acetate type-resin (homopolymer or copolymer of vinyl acetate), for example.
- polyvinyl acetate resins include polyvinyl acetate, which is a homopolymer of vinyl acetate, and copolymers of vinyl acetate and other monomers copolymerizable therewith.
- unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids etc. are mentioned, for example.
- the polyvinyl alcohol or a derivative thereof may be further modified, and may be, for example, polyvinyl formal or polyvinyl acetal modified with aldehydes.
- the degree of saponification of the polyvinyl alcohol resin is preferably 85% or more, more preferably 95% by mol or more, still more preferably 99% by mol or more, and particularly preferably 99.5% by mol or more.
- the degree of saponification is less than the above lower limit, the polyvinyl alcohol-based resin is easily eluted, causing in-plane unevenness of optical properties, decrease in dyeability in the dyeing step, and breakage in the drawing step, and productivity significantly It is not preferable because there is a risk of reduction.
- the polymerization degree of the polyvinyl alcohol resin is preferably 1000 to 10000, more preferably 2000 to 10000, and 3500 to 10000. More preferably, it is particularly preferably 5000 to 10000.
- the degree of polymerization exceeds 10000, the polyvinyl alcohol-based resin becomes hard, the film forming property and the stretchability decrease, and the productivity decreases, so the degree of polymerization is preferably 10000 or less from an industrial viewpoint.
- the degree of polymerization of the polyvinyl alcohol-based resin means the viscosity average degree of polymerization, and can be determined by a method known in the art.
- a polyvinyl alcohol resin is formed into a film to obtain a film original film made of a polyvinyl alcohol resin.
- a film forming method of polyvinyl alcohol resin in addition to a method of melt-extruding a water-containing polyvinyl alcohol resin, a cast film forming method, a wet film forming method (a method of forming a film by discharge into a poor solvent), gelation Film method (a method of cooling gelation of an aqueous solution of polyvinyl alcohol resin once and then extracting the solvent and removing it), cast film formation method (a method of flowing an aqueous solution of polyvinyl alcohol resin onto a substrate and drying it)
- combinations of methods may be employed, the present invention is not limited to these methods.
- the solvent is not particularly limited, and examples thereof include dimethylsulfoxide, dimethylformamide, dimethylacetamide, N-methylpyrrolidone, ethylene glycol, glycerin, propylene glycol, diethylene glycol, Triethylene glycol, tetraethylene glycol, trimethylolpropane, ethylenediamine, diethylenetriamine, water and the like can be mentioned.
- the solvent may be used alone or in combination of two or more.
- the amount of solvent used in film formation is preferably 70 to 95% by weight with respect to the whole film formation solution (a mixed solution containing a polyvinyl alcohol resin and a solvent used for film formation), but is not limited.
- the amount of the solvent is less than 70% by weight, the viscosity of the film forming solution becomes high, and filtration and degassing during preparation become difficult, and it becomes difficult to obtain a film having no foreign matter or defects.
- the amount of solvent exceeds 95% by weight, the viscosity of the film forming solution becomes too low, which makes it difficult to control the intended thickness, the influence of the surface fluctuation by the wind during drying becomes large, and the drying time is long Productivity is reduced.
- a plasticizer may be used in producing the film stock.
- the plasticizer include glycerin, diglycerin, ethylene glycol, propylene glycol, low molecular weight polyethylene glycol and the like, but are not limited thereto.
- the amount of the plasticizer to be used is also not particularly limited, but usually 5 to 15 parts by weight is preferable with respect to 100 parts by weight of the polyvinyl alcohol resin.
- Examples of the method for drying the film stock after film formation include, but are not limited to, drying with hot air, contact drying using a heat roll, drying with an infrared heater, and the like. One of these drying methods may be used alone, or two or more thereof may be used in combination.
- the drying temperature is also not particularly limited, but is preferably in the range of 50 to 70 ° C.
- the heat treatment method of the film stock after film formation may be, for example, a method using hot air, a method of bringing the film stock into contact with a heat roll, etc., and it is not particularly limited as long as it can be treated by heat. One of these methods may be used alone, or two or more of them may be used in combination.
- the heat treatment temperature is not particularly limited, but is preferably in the range of 110 to 140.degree.
- the heat treatment time is preferably about 1 to 10 minutes, but is not particularly limited.
- the thickness of the raw film material thus obtained is preferably 20 to 100 ⁇ m, more preferably 20 to 80 ⁇ m, and still more preferably 20 to 60 ⁇ m.
- the thickness is less than 20 ⁇ m, breakage of the film tends to occur.
- the thickness exceeds 100 ⁇ m, the stress applied to the film at the time of stretching becomes large, the mechanical load in the stretching process becomes large, and a large-scale device for supporting the load is required.
- the swelling step is performed by immersing a raw film made of a polyvinyl alcohol resin in a solution at 20 to 50 ° C. for 30 seconds to 10 minutes.
- the solution is preferably an aqueous solution. Since swelling of the film also occurs during the dyeing process of the azo compound, the swelling step can be omitted if it is intended to shorten the time for producing the polarizing element.
- the swelling degree F of the raw film is preferably 180 to 260%, more preferably 200 to 240%, and still more preferably 210 to 230%.
- the swelling degree F is less than 200%, the elongation at the time of stretching is small, and the possibility of breakage at a low magnification is high. If it is less than 180%, the elongation at the time of stretching is significantly reduced, the possibility of breakage is high, and it becomes difficult to perform sufficient stretching.
- the degree of swelling F exceeds 240%, the swelling becomes excessive, wrinkles and slack occur, and it is becoming a cause of cutting at the time of stretching. If the degree of swelling F exceeds 260%, it may cause remarkable wrinkles and sags, which is not preferable.
- a suitable degree of swelling F can be achieved by temperature and time when heat-treating the film stock after film formation.
- the degree of swelling F of the film stock can be measured by a method known in the art, and for example, it is measured by the following method.
- the immersed film is taken out from distilled water, sandwiched by two sheets of filter paper, and the water droplets on the film surface are absorbed by the filter paper, and then the weight [ ⁇ (g)] of the film immersed in water is measured.
- the film which has been dipped and absorbed water droplets is dried in a dryer at 105 ° C. for 20 hours, cooled in a desiccator for 30 minutes, and then the weight of the film after drying [ ⁇ (g)] is measured.
- a dyeing step is performed.
- the azo compound in which the form of the free acid is represented by the general formula (1) is optionally added with other azo compounds (such as the azo compound in which the form of the free acid is represented by the general formula (10)) And polyvinyl alcohol resin films.
- staining process will not be specifically limited if it is the method of adsorbing an azo compound to a polyvinyl alcohol-type resin film,
- it is carried out by immersing a polyvinyl alcohol-type resin film in the solution containing an azo compound.
- the solution temperature in this dyeing step is preferably 5 to 60 ° C., more preferably 20 to 50 ° C., particularly preferably 35 to 50 ° C.
- the immersion time in the solution can be adjusted appropriately, but is preferably adjusted to 30 seconds to 20 minutes, and more preferably 1 to 10 minutes.
- coating this solution to a polyvinyl alcohol-type resin film may be used.
- the solution containing the azo compound which is a dichroic dye can contain sodium carbonate, sodium hydrogencarbonate, sodium chloride, sodium sulfate, anhydrous sodium sulfate, sodium tripolyphosphate and the like as a dyeing assistant.
- the content of these dyeing assistants can be adjusted to any concentration depending on the time and temperature of dyeing due to the dyeability of the azo compound, but it is preferably 0 to 5% by weight and more preferably 0.1 to 2% by weight.
- the washing process is a step of washing the dye solvent adhering to the surface of the polyvinyl alcohol resin film in the dyeing step with a washing solution.
- the washing step 1 is a step of washing the dye solvent adhering to the surface of the polyvinyl alcohol resin film in the dyeing step with a washing solution.
- water is used as a washing solution.
- the cleaning method a method of immersing in a cleaning solution is preferable, but a method of applying the cleaning solution to a polyvinyl alcohol resin film can also be used.
- the washing time is not particularly limited, but preferably 1 to 300 seconds, more preferably 1 to 60 seconds.
- the temperature of the washing solution in the washing step 1 needs to be a temperature at which the hydrophilic polymer does not dissolve, and is generally 5 to 40.degree.
- a step of incorporating a crosslinking agent and / or a water resistant agent into the polyvinyl alcohol resin film can be carried out.
- the crosslinking agent include boric acid, boron compounds such as borax or ammonium borate, polyaldehydes such as glyoxal or glutaraldehyde, polyisocyanate compounds such as biuret type, isocyanurate type or block type, titanium Titanium compounds such as oxysulfate can be used, and ethylene glycol glycidyl ether, polyamide epichlorohydrin, etc. can also be used, but boric acid is preferable.
- water resistant agent examples include succinic acid peroxy, ammonium persulfate, calcium perchlorate, benzoin ethyl ether, ethylene glycol diglycidyl ether, glycerin diglycidyl ether, ammonium chloride and magnesium chloride.
- the step of containing the crosslinking agent and / or the water resistant agent in the polyvinyl alcohol resin film is performed using at least one of the crosslinking agent and / or the water resistant agent shown above.
- the crosslinking agent and / or the water resistant agent are usually used in the form of a solution dissolved in a solvent. Water is preferable as the solvent, but is not limited.
- the concentration of the crosslinking agent and / or the water resistance agent in the solvent in the step of containing the crosslinking agent and / or the water resistance agent is 0.1 to 6 with respect to the solvent, as exemplified by boric acid. 0% by weight is preferable, and 1.0 to 4.0% by weight is more preferable.
- the temperature of the solvent in this step is preferably 5 to 70 ° C., more preferably 5 to 50 ° C.
- the polyvinyl alcohol-based resin film preferably contains a crosslinking agent and / or a water-resistant agent by immersing the polyvinyl alcohol-based resin film in a solution of the crosslinking agent and / or the water-resistant agent. It may be a method of coating or coating on a resin film.
- the treatment time in this step is preferably 30 seconds to 6 minutes, and more preferably 1 to 5 minutes.
- the stretching step is carried out after the washing step 1 or after the step of incorporating a crosslinking agent and / or a water resistant agent.
- the stretching step is a step of uniaxially stretching the polyvinyl alcohol resin film.
- the stretching method may be either a wet stretching method or a dry stretching method. Although the present invention can be achieved if the stretching ratio is 3 times or more, it is preferably 5 to 7 times.
- the stretching heating medium is an air medium
- the temperature of the air medium at the time of stretching is preferably from normal temperature to 180 ° C.
- the stretching treatment is preferably performed in an atmosphere of humidity 20 to 95% RH.
- the stretching method include an inter-roll zone stretching method, a roll heating stretching method, a pressure stretching method, an infrared heating stretching method, and the like, but the stretching method is not limited.
- the stretching process can be performed by one-stage stretching, but can also be performed by two or more multistage stretching.
- the polyvinyl alcohol-based resin film is stretched in water, a water-soluble organic solvent, or a mixed solution thereof. It is preferable to perform the stretching treatment while immersing the polyvinyl alcohol-based resin film in a solution containing the crosslinking agent and / or the water resistant agent.
- crosslinking agent examples include boric acid, boron compounds such as borax or ammonium borate, polyaldehydes such as glyoxal or glutaraldehyde, polyisocyanate compounds such as biuret type, isocyanurate type or block type, titanium Titanium-based compounds such as oxysulfate can be used, but ethylene glycol glycidyl ether, polyamide epichlorohydrin, etc. can also be used.
- water resistant agent examples include succinic acid peroxy, ammonium persulfate, calcium perchlorate, benzoin ethyl ether, ethylene glycol diglycidyl ether, glycerin diglycidyl ether, ammonium chloride and magnesium chloride.
- the step of containing the crosslinking agent and / or the water resistant agent in the polyvinyl alcohol resin film is performed using at least one of the crosslinking agent and / or the water resistant agent shown above.
- the crosslinking agent and / or the water resistant agent are usually used in the form of a solution dissolved in a solvent. Water is preferable as the solvent, but is not limited. Containing the crosslinker and / or water resistant
- the polyvinyl alcohol-based resin film is stretched in a solution containing at least one or more crosslinking agents and / or a water resistant agent shown above.
- the crosslinking agent boric acid is preferred.
- the concentration of the crosslinking agent and / or the water resistance agent in the stretching step is, for example, preferably 0.5 to 15% by weight, and more preferably 2.0 to 8.0% by weight.
- the stretching ratio is preferably 2 to 8 times, more preferably 5 to 7 times.
- the stretching temperature is preferably 40 to 60 ° C., and more preferably 45 to 58 ° C.
- the stretching time is usually 30 seconds to 20 minutes, preferably 2 to 5 minutes.
- the wet drawing process can be performed by one-stage drawing, but can also be performed by two or more multistage drawing.
- cleaning step 2 After performing the stretching step, since a deposition of a crosslinking agent and / or a water resistance agent may occur on the film surface, or foreign matter may adhere, a cleaning step (hereinafter referred to as “cleaning step 2”) for cleaning the film surface is used. It can be carried out.
- the washing time is preferably 1 second to 5 minutes.
- a cleaning method a method of immersing in a cleaning solution is preferable, but a method of applying or coating the cleaning solution on a polyvinyl alcohol resin film can also be used.
- the cleaning process may be performed in one stage or may be performed in two or more stages.
- the temperature of the washing solution in the washing step is not particularly limited, but is usually 5 to 50 ° C., preferably 10 to 40 ° C.
- a solvent used in the processing steps up to here for example, water; dimethyl sulfoxide; N-methyl pyrrolidone; methanol, ethanol, propanol, isopropyl alcohol, glycerin, ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, tri
- solvents such as alcohols such as methylol propane; amines such as ethylene diamine or diethylene triamine. It is also possible to use mixtures of one or more of these solvents.
- the most preferred solvent is water.
- a drying step of the polyvinyl alcohol-based resin film is performed.
- the drying process can be carried out by natural drying, but in order to further enhance the drying efficiency, surface moisture removal can be performed by compression with a roll, an air knife, a water absorption roll or the like, and along with such moisture removal. Alternatively, instead of such water removal, air-drying can be performed.
- the temperature of the drying treatment is preferably 20 to 100 ° C., and more preferably 60 to 100 ° C.
- the drying time may be in the range of 30 seconds to 20 minutes, but is preferably 5 to 10 minutes.
- a dichroic dye in order to further improve the polarization performance, is used, for example, by causing iodine to be contained in a substrate using a staining solution containing iodine and adsorbing it within a range that can maintain desired durability.
- a certain iodine may be included in the polarizing element.
- the staining solution contains iodine and iodide.
- potassium iodide, ammonium iodide, cobalt iodide, zinc iodide etc. can be used, for example, it is not limited to the iodide shown here.
- the concentration of iodine is preferably 0.0001 to 0.5% by weight, and more preferably 0.001 to 0.4% by weight.
- the iodide concentration is preferably 0.0001 to 8% by weight.
- the treatment process in this case, for example, any one of a dyeing process, a washing process 1, an extending process, and a washing process 2 or plural processes thereof can be used.
- the treatment temperature is preferably 5 to 60 ° C., more preferably 5 to 50 ° C., and particularly preferably 10 to 40 ° C.
- the treatment time can be properly adjusted, but is preferably adjusted to 30 seconds to 20 minutes, more preferably 1 to 5 minutes.
- the polarizing plate of the present invention includes the polarizing element of the present invention and a transparent protective layer provided on at least one surface of the polarizing element.
- the transparent protective layer can be provided as a coating layer of a transparent polymer or as a laminate layer of a transparent film.
- a transparent polymer or transparent film forming the transparent protective layer a transparent polymer or transparent film having high mechanical strength and good thermal stability is preferable.
- a transparent polymer or transparent film used for the transparent protective layer for example, cellulose acetate resin or film thereof such as triacetyl cellulose or diacetyl cellulose, acrylic resin or film thereof, polyvinyl chloride resin or film thereof, nylon resin or film thereof, Polyester resin or film thereof, polyarylate resin or film thereof, cyclic polyolefin resin or film thereof using cyclic olefin such as norbornene as monomer, polyethylene, polypropylene, polyolefin having cyclo or norbornene skeleton or copolymer thereof, main chain Or polymers (or resins) of imide and / or amide side chains or films thereof.
- cellulose acetate resin or film thereof such as triacetyl cellulose or diacetyl cellulose, acrylic resin or film thereof, polyvinyl chloride resin or film thereof, nylon resin or film thereof, Polyester resin or film thereof, polyarylate resin or film thereof, cyclic polyolefin resin or film thereof using cyclic ole
- a resin having liquid crystallinity or a film thereof can be provided as the transparent protective layer.
- the thickness of the protective film is, for example, about 0.5 to 200 ⁇ m.
- One layer of resin or film may be provided on one side of the polarizing element, two or more layers of the same or different resins or films may be provided on one side of the polarizing element, and the same or different resins or films on both sides of the polarizing element One or more layers may be provided.
- An adhesive can be used to bond the transparent protective layer to the polarizing element.
- the adhesive is not particularly limited, but a polyvinyl alcohol adhesive is preferable.
- the polyvinyl alcohol adhesive include GOOSENOL (registered trademark) NH-26 (manufactured by Japan Synthetic Chemical Industry Co., Ltd.), EXEVAL (registered trademark) RS-2117 (manufactured by Kuraray Co., Ltd.), etc. It is not something to be done.
- a crosslinker and / or a water resistant agent can be added to the adhesive.
- the polyvinyl alcohol adhesive may be mixed with a maleic anhydride-isobutylene copolymer, in which case, if necessary, a crosslinking agent may be mixed.
- maleic anhydride-isobutylene copolymer examples include Isoban (registered trademark) # 18 (manufactured by Kuraray Co., Ltd.), Isovan (registered trademark) # 04 (manufactured by Kuraray Co., Ltd.), and ammonia-modified isoban (registered trademark) # 104. (Made by Kuraray Co., Ltd.), ammonia modified isoban (registered trademark) # 110 (made by Kuraray Co., Ltd.), imidized isoban (registered trademark) # 304 (made by Kuraray Co., Ltd.), imidated isoban (registered trademark) # 310 (stock) Company Kuraray) and the like.
- a water-soluble polyvalent epoxy compound can be used as the crosslinking agent to be mixed with the maleic anhydride-isobutylene copolymer if necessary.
- the water soluble polyvalent epoxy compound include Denacol EX-521 (manufactured by Nagase ChemteX Co., Ltd.) and TETRAD (registered trademark) -C (manufactured by Mitsubishi Gas Chemical Co., Ltd.).
- well-known adhesives other than polyvinyl alcohol adhesives such as a urethane type adhesive agent, an acryl type adhesive agent, and an epoxy type adhesive agent, can also be used.
- additives such as zinc compounds, chlorides and iodides may be contained in the adhesive at a concentration of about 0.1 to 10% by weight for the purpose of improving the adhesive strength of the adhesive or improving the water resistance. it can.
- the additives are also not limited. After laminating a transparent protective layer on at least one surface of the polarizing element with an adhesive, the polarizing plate is obtained by drying or heat treatment at a suitable temperature.
- the polarizing plate when the polarizing plate is attached to a display device such as a liquid crystal display device or an organic electroluminescence display device, the viewing angle improvement and / or the contrast on the surface of the transparent protective layer which becomes an unexposed surface after being attached It is also possible to provide various functional layers for improvement, a layer or film having brightness improvement. In order to bond the polarizing plate to these layers or films or a display device, it is preferable to use an adhesive.
- the polarizing plate may be provided with various known functional layers such as an antireflection layer, an antiglare layer, a hard coat layer, and the like on the other surface of the transparent protective layer, that is, the exposed surface.
- a coating method is preferable for producing the various functional layers, but a method of laminating a film having the function via an adhesive or a pressure sensitive adhesive can also be used.
- the functional layer can be a layer or film that controls retardation.
- the polarizing plate of the present invention comprising the polarizing element according to the first embodiment of the present invention comprises a polarizing element comprising a substrate and an azo compound, and a transparent protective layer provided on at least one side of the polarizing element.
- a polarizing element comprising a substrate and an azo compound
- a transparent protective layer provided on at least one side of the polarizing element.
- the azo compound an azo compound in which the form of the free acid is represented by the general formula (1-1) and an azo compound in which the form of the free acid is represented by the general formula (1-2) are used.
- the optical properties are improved, and the resistance to light, heat, and humidity is improved.
- a polarizing element comprising a base material and an azo compound
- a transparent protective layer provided on at least one side of the polarizing element.
- the azo compound an azo compound in which the form of a free acid is represented by General Formula (2-1), an azo compound in which a form of a free acid is represented by General Formula (2-2), and a free acid
- the optical properties are improved, and the durability to light, heat, and humidity is improved.
- the optical characteristics are improved by using at least one azo compound or a cupric compound thereof in which the form of a free acid is represented by the general formula (3-1) as the azo compound, and , Durability to humidity is improved.
- the azo compound the azo compound represented by the general formula (4-1) or a salt thereof and the azo compound represented by the general formula (4-2) or a salt thereof.
- the optical properties are improved, and the resistance to light, heat and humidity is improved.
- the polarizing plate of the present invention comprising the polarizing element according to the fifth embodiment of the present invention comprises a polarizing element comprising a base material and an azo compound, and a transparent protective layer provided on at least one side of the polarizing element.
- a polarizing element comprising a base material and an azo compound
- a transparent protective layer provided on at least one side of the polarizing element.
- the azo compound an azo compound in which the form of the free acid is represented by the general formula (5-1) and an azo compound in which the form of the free acid is represented by the general formula (5-2) or a metal complex thereof
- the polarizing plate of the present invention comprising the polarizing element according to the fifth embodiment of the present invention comprises a polarizing element comprising a base material and an azo compound, and a transparent protective layer provided on at least one side of the polarizing element.
- a polarizing element comprising a base material and an azo compound
- a transparent protective layer provided on at least one side of the polarizing element.
- the azo compound an azo compound in which the form of free acid is represented by the general formula (6-1) and an azo compound in which the form of free acid is represented by the formula (2) or a metal complex thereof
- the polarizing element and the polarizing plate of the present invention can be used in a display device such as a liquid crystal display device.
- a display device using the polarizing element or polarizing plate of the present invention is a display device having high durability and high contrast in the long run.
- the polarizing element and the polarizing plate of the present invention may each be provided with a protective layer or a functional layer, a support, etc. as necessary, and a liquid crystal projector, a calculator, a watch, a notebook computer, a word processor, a liquid crystal television, a polarizing lens, polarizing glasses It is used for car navigation, organic electroluminescence display, and indoor / outdoor measuring instruments and displays.
- the polarizing plate of the present invention may be attached to a support and used as a polarizing plate with a support.
- a support since a polarizing plate is stuck, what has a plane part is preferred.
- a glass molded article is preferable. Examples of the glass molded product include a glass plate, a lens, a prism (for example, a triangular prism, a cubic prism, etc.) and the like. What attached the polarizing plate to the lens can be used as a condenser lens with a polarizing plate in a liquid crystal projector.
- the polarizing plate to the prism can be used as a polarizing beam splitter with a polarizing plate or a dichroic prism with a polarizing plate in a liquid crystal projector.
- the polarizing plate may be attached to the liquid crystal cell.
- the material of the glass molded product include inorganic glass such as soda glass, borosilicate glass, quartz crystal, sapphire, and organic plastic such as acrylic resin and polycarbonate, but inorganic glass is preferable.
- the thickness and size of the glass plate may be any desired size.
- an antireflection layer is provided on one or both of the glass surface and the polarizing plate surface.
- a transparent adhesive (adhesive) agent is applied to the surface of such a support, for example, to the surface of the flat portion of the support, and then the polarizing plate of the present invention is attached to the coated surface.
- a transparent adhesive (adhesive) agent may be applied to the polarizing plate, and then a support may be attached to the applied surface.
- the adhesive (adhesive) agent used here is preferably, for example, an acrylic ester type.
- this polarizing plate When this polarizing plate is used as an elliptically polarizing plate in combination with a retardation plate, the retardation plate side of the elliptically polarizing plate is usually attached to a support, but the polarizing plate side of the elliptically polarizing plate is supported You may stick to the body.
- the display device of the present invention comprises the polarizing element of the present invention or the polarizing plate of the present invention.
- the display device of the present invention may be, for example, a liquid crystal cell, a polarizing element of the present invention disposed on one side or both sides of the liquid crystal cell, or a reflection type, transmission type, or both transmission and reflection types.
- a liquid crystal display device such as a mold can be obtained.
- the above-mentioned liquid crystal cell is arbitrary, for example, an appropriate type of liquid crystal cell of active matrix drive type represented by thin film transistor type, liquid crystal cell of simple matrix drive type represented by twist nematic type or super twist nematic type A liquid crystal cell may be used.
- one or more appropriate other optical members such as, for example, a prism array sheet, a lens array sheet, a light diffusion plate, and a backlight can be disposed at appropriate positions.
- the polarizing element of the present invention or the polarizing plate of the present invention or the other optical member may be the same on both sides or may be different on both sides.
- the display device of the present invention may also have an adhesive layer for adhering to another member such as a liquid crystal cell on one side or both sides of the polarizing element of the present invention or the polarizing plate of the present invention.
- An appropriate adhesive substance or adhesive can be used to form the adhesive layer, and there is no particular limitation.
- the constituent material of the adhesive layer those having an appropriate polymer such as an acrylic resin, silicone resin, polyester, polyurethane, polyamide, polyether, fluorocarbon resin, rubber, etc. as a base polymer can be mentioned.
- the display device of the present invention is a liquid crystal display device in general such as a twisted nematic system (TN), a super twisted nematic system (STN), a thin film transistor system (TFT), a vertical alignment system (VA), an in-plane switching system (IPS), It can be used in other displays such as organic electroluminescent (commonly known as "OLED”) displays, projection displays, reflective displays, 3D displays, as well as polarized lenses.
- TN twisted nematic system
- STN super twisted nematic system
- TFT thin film transistor system
- VA vertical alignment system
- IPS in-plane switching system
- OLED organic electroluminescent
- the transmittance at each wavelength of one polarizing plate is single transmittance Ts, and the transmittance at each wavelength when two polarizing plates are stacked so that their absorption axis directions are the same is parallel transmittance Tp,
- the transmittance at each wavelength when two polarizing plates are stacked so that their absorption axes are orthogonal to each other is shown as the orthogonal position transmittance Tc, C light source 2 ° field of view, single transmittance corrected for visibility by chromaticity function Ys, C light source 2 ° field of view, parallel transmittance corrected by the chromaticity function YP, C light source 2 ° field of view, orthogonal transmittance corrected by the chromaticity function Yc.
- Visibility correction was performed based on JIS Z 8722: 2009.
- the respective transmittances Ts, Tp, Tc, Ys, Yp, and Yc were measured at each wavelength of 5 nm using a spectrophotometer (“U-4100” manufactured by Hitachi High-Technologies Corporation).
- the degree of polarization y y (%) of the polarizing plate was determined by the following equation (13) from the parallel transmittance Xp corrected for visual sensitivity and the orthogonal transmittance Yc corrected for visual sensitivity.
- ⁇ y ⁇ (Yp ⁇ Yc) / (Yp + Yc) ⁇ 1/2 ⁇ 100 (13)
- the contrast value CR was calculated by the following equation (14) from the parallel transmittance Xp corrected for visual sensitivity and the orthogonal transmittance Yc corrected for visual sensitivity.
- CR Yp / Yc (14)
- Example 1 [Synthesis of Azo Compound of Compound Example 38] 25.3 parts by weight of 4-aminobenzene-1,3-disulfonic acid is added to 500 parts by weight of water, cooled, 31.3 parts by weight of 35% by weight aqueous solution of hydrochloric acid is added at 10 ° C. or less, and sodium nitrite 6 Then, 9 parts by weight was added, and the mixture was stirred at 5 to 10 ° C. for 1 hour for diazotization.
- the monoazoamino compound of the structural formula (15) thus obtained is added to 400 parts by weight of water, dissolved with sodium hydroxide, and 25.0 parts by weight of a 35% by weight aqueous solution of hydrochloric acid at 10 to 30 ° C. .5 parts by weight was added and stirred for 1 hour at 20 to 30.degree. C. to diazotize.
- 8.6 parts by weight of 3-methylaniline dissolved in dilute aqueous hydrochloric acid is added as a secondary coupler, sodium carbonate is added to a pH of 3 while stirring at 20-30 ° C., and the mixture is further stirred to perform a coupling reaction.
- the resulting disazoamino compound of the structural formula (16) is added to 250 parts by weight of water, dissolved with sodium hydroxide, and 20.0 parts by weight of a 35% by weight aqueous solution of hydrochloric acid at 20 to 30 ° C. .4 parts by weight were added, and the mixture was stirred at 20 to 30 ° C for 1 hour to diazotize.
- 8.8 parts by weight of 2-methoxy-5-methylaniline dissolved in dilute hydrochloric acid aqueous solution is added as a third coupler, sodium carbonate is added while stirring at 20 to 30 ° C. to adjust to pH 3.5, and further stirring
- the coupling reaction is completed, and filtered to give the structural formula (17) 32.6 parts by weight of the trisazoamino compound represented by
- the obtained trisazoamino compound of the structural formula (17) is added to 200 parts by weight of water, dissolved with sodium hydroxide, 16.0 parts by weight of a 35% by weight aqueous solution of hydrochloric acid at 20 to 30 ° C., and then sodium nitrite 3.5 parts by weight was added, and the mixture was stirred at 20 to 30 ° C. for 1 hour to be diazotized to obtain a diazotized trisazoamino compound.
- 16.1 parts by weight of 6-phenylamino-1-naphthol-3-sulfonic acid was added to 50 parts by weight of water as a fourth-order coupler, and it was dissolved as sodium carbonate to obtain a solution.
- the film on which the azo compound was adsorbed was washed with water, and was then treated with boric acid for 1 minute with a 30 ° C. aqueous solution containing 2% by weight of boric acid.
- the film obtained by the boric acid treatment was subjected to boric acid treatment for 5 minutes in a 58 ° C. aqueous solution containing 3.0% by weight of boric acid while being stretched 5.0 times.
- the film was washed with normal temperature water for 20 seconds while maintaining the tension of the film obtained by the boric acid treatment.
- the film obtained by the washing treatment was immediately dried at 60 ° C. for 5 minutes to obtain a polarizing element having a single transmittance of about 41% and a film thickness of 15 ⁇ m.
- polarizing plate An alkaline-treated triacetylcellulose film (“TD-80U” manufactured by Fuji Photo Film Co., Ltd .; hereinafter abbreviated as “TAC”) treated with polyvinyl alcohol is adhered to both surfaces of the obtained polarizing element. By bonding using an agent, it laminated
- TAC triacetylcellulose film
- Example 2 [Synthesis of Azo Compound of Compound Example 56] The following structural formula (18) is substituted for 16.1 parts by weight of 6-phenylamino-1-naphthol-3-sulfonic acid as a fourth-order coupler.
- the form of a free acid is represented by the general formula (1-2)
- the azo compound of Compound Example 56 was synthesized as an azo compound.
- the form of the free acid was represented by the general formulas (1-1), (1-2), and ( A polarizing element was produced using a polyvinyl alcohol film containing an azo compound represented by 10) and having a single transmittance of about 41% using a polyvinyl alcohol film, and a polarizing plate was produced as a measurement sample.
- Example 5 As the azo compound represented by the general formula (1-1), the form of C.I. I. Example 3 is the same as Example 3 except that the sodium salt of the azo compound of Compound Example 22 (the azo compound of the formula (10) synthesized in Example 2 of Patent No. 4662853) is used instead of Direct Red 117. Similarly, the single transmittance of the polyvinyl alcohol film containing an azo compound represented by the general formulas (1-1), (1-2), and (10), respectively, is approximately 41%. While manufacturing the polarizing element of the above, a polarizing plate was manufactured and used as a measurement sample.
- the disazoamino compound represented by the above structural formula (16) is added to 250 parts by weight of water, dissolved with sodium hydroxide, and 20.0 parts by weight of a 35% by weight aqueous solution of hydrochloric acid at 20 to 30 ° C. 4.4 parts by weight of sodium nitrite was added, and the mixture was stirred at 20 to 30 ° C. for 1 hour for diazotization. Thereto, 7.7 parts by weight of 2,5-dimethylaniline dissolved in dilute hydrochloric acid aqueous solution is added, and while stirring at 20-30 ° C., sodium carbonate is added to adjust to pH 3.5, and the stirring is further completed to complete the coupling reaction. Filter, and the following structural formula (19) 31.8 parts by weight of the trisazoamino compound represented by
- the obtained trisazoamino compound of the structural formula (19) is added to 200 parts by weight of water, dissolved with sodium hydroxide, 16.0 parts by weight of a 35% by weight aqueous solution of hydrochloric acid at 20 to 30 ° C., and then sodium nitrite 3.5 parts by weight was added, and the mixture was stirred at 20 to 30 ° C. for 1 hour to be diazotized to obtain a diazotized trisazoamino compound.
- 18.3 parts by weight of 6- (4'-aminobenzoylamino) -1-naphthol-3-sulfonic acid was added to 50 parts by weight of water and dissolved as sodium carbonate to obtain a solution.
- Example 2 aqueous solution.
- the form of the free acid was represented by the general formula (1-1)
- (1- A polarizing element was produced using a polyvinyl alcohol film containing an azo compound represented by 2) and (10), respectively, using a polyvinyl alcohol film, and a polarizing plate was produced as a measurement sample.
- Example 1 [Fabrication of Polarizing Element and Polarizing Plate] The procedure of Example 1 is repeated except that the azo compound of Compound Example 61 is used instead of the azo compound of Compound Example 38 as the azo compound of which the form of the free acid is represented by General Formula (1-2).
- Example 8 Synthesis of Azo Compound of Compound Example 62
- 6-phenylamino-1-naphthol-3-sulfonic acid instead of 16.1 parts by weight of 6-phenylamino-1-naphthol-3-sulfonic acid as a fourth-order coupler, 17.7 parts by weight of 6- (4'-methoxyphenylamino) -1-naphthol-3-sulfonic acid
- the azo compound of Compound Example 62 is used as an azo compound in which the form of the free acid is represented by General Formula (1-2) in the same manner as in the synthesis of the azo compound of Compound Example 41 in Example 3 except that used. Synthesized.
- Example 1 [Fabrication of Polarizing Element and Polarizing Plate] The procedure of Example 1 is repeated except that the azo compound of Compound Example 62 is used instead of the azo compound of Compound Example 38 as the azo compound of which the form of the free acid is represented by General Formula (1-2).
- Example 9 It is the same as that of Example 7 except that the following iodine, iodide treatment, stretching treatment, and iodide treatment are performed after the dyeing step (step of adsorbing the azo compound to the film) of Example 7 to produce a polarizing element.
- a free acid each of which has an azo compound represented by each of the general formulas (1-1), (1-2), and (10)
- the single transmittance using a polyvinyl alcohol film is about 41%.
- a polarizing plate was manufactured and it was set as the measurement sample.
- the iodine, iodide treatment, stretching treatment and iodide treatment after the dyeing step were carried out as follows. That is, first, 28.6 g / l boric acid (manufactured by Societa Chimica Larderello spa), 28.6 g / l, iodine (manufactured by Junsei Chemical Co., Ltd.) 0.25 g / l, in which azo compound is adsorbed. The film was immersed in an aqueous solution at 30 ° C.
- Example 11 As the azo compound represented by the general formula (1-1), the form of C.I. I. Example 3 is the same as Example 3 except that the azo compound of Compound Example 35 (disazo compound of Compound No. 1 synthesized in Synthesis Example 1 of JP-A-2003-215338) is used instead of Direct Red 117. Similarly, the single transmittance of the polyvinyl alcohol film containing an azo compound represented by the general formulas (1-1), (1-2), and (10), respectively, is approximately 41%. While manufacturing the polarizing element of the above, a polarizing plate was manufactured and used as a measurement sample.
- Example 12 As the azo compound represented by the general formula (1-1), the form of C.I. I.
- the following structural formula (20) (the formula (2) in Japanese Patent No. 2622748), which is synthesized in Example 1 of Japanese Patent No. 2622748, instead of the direct red 117
- the trisazo dye represented by is used, and the azo acid represented by the general formulas (1-1), (1-2), and (10) as the form of the free acid
- a polarizing element was produced using a polyvinyl alcohol film containing a compound and having a single transmittance of about 41% using a polyvinyl alcohol film, and a polarizing plate was produced as a measurement sample.
- Comparative Example 1 A polarizing element is produced in the same manner as in Example 1 except that the composition of the azo compound in Example 1 is changed to the composition of the azo compound described in Example 2 of JP-A-11-218611, and the polarizing plate is The produced and produced polarizing plate was used as a measurement sample.
- Comparative Example 2 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 1 except that the composition of the azo compound in Example 1 is changed to the composition of the azo compound described in Example 3 of Patent No. 4162334. The produced polarizing plate was used as a measurement sample.
- Example 3 As the azo compound represented by the general formula (1-1), the form of C.I. I. Example 6 is the same as Example 3 except that the dye (azo compound) described in Example 1 of JP-B-64-5623, which is an azo compound exhibiting the same blue color in a polarizing element, instead of the direct red 117 is used.
- Comparative Example 4 instead of the azo compound of Compound Example 30 as the azo compound in which the form of the free acid is represented by General Formula (1-2), it is an azo compound in which the form of the free acid is represented by General Formula (1-1)
- the form of the free acid is a compound represented by the general formula (1-1)
- a polarizing element was produced using a polyvinyl alcohol film containing an azo compound represented by each of (1) and (10) and having a single transmittance of about 41%, and a polarizing plate was produced as a measurement sample.
- Comparative Example 6 A polarizing element was produced in the same manner as in Comparative Example 3 of JP-A-2006-276236 except that the time of the dyeing process was adjusted so that the polarizing element having a single transmittance of about 40.5% was obtained.
- a polarizing plate was produced as a measurement sample in the same manner as in Example 1 except that the polarizing element obtained in the present comparative example was used instead of the polarizing element obtained in Example 1.
- Table 1 shows measurement results of single transmittance Ys, parallel transmittance Yp, orthogonal transmittance Yc, polarization degree yy, and contrast value CR in the polarizing plates of Examples 1 to 12 and Comparative Examples 1 to 5.
- the polarizing plates of Examples 1 to 12 according to the first embodiment of the present invention were polarizing plates having improved polarization performance and contrast as compared to the conventional polarizing plate using an azo compound. .
- the polarizing plate of Example 3 according to the first embodiment of the present invention has a high temperature and high humidity (temperature 85 ° C. and humidity 85) as compared with the polarizing plates of Comparative Example 1 and Comparative Example 2. %) It was a highly durable polarizing plate with little change in transmittance under environment.
- the polarizing plates of Example 8 and Example 9 according to the first embodiment of the present invention are higher in temperature and humidity (temperature 65 ° C. and humidity 95) as compared with the polarizing plate of Comparative Example 6. %) It was a highly durable polarizing plate with little change in the transmittance and the degree of polarization under the environment.
- the polarizing element and the polarizing plate according to the first embodiment of the present invention have improved optical characteristics and durability. I understand. Therefore, by using this polarizing element or polarizing plate, it is possible to obtain a display device and a polarizing lens which are excellent in polarization characteristics and high in durability.
- 2-61988 and the form of a free acid are represented by the general formula (10)
- Example 2 In the same manner as in Example 1 except that this aqueous solution at 40 ° C. was used instead of the aqueous solution at 40 ° C. used in Example 1, a polarizing element having a single transmittance of about 40% and a film thickness of 15 ⁇ m was produced. At the same time, a polarizing plate was produced and used as a measurement sample.
- the azo compounds represented by the general formulas (2-1), (2-2) and (10) and the forms of the free acids are represented by the general formula (2-3).
- the polarizing element and polarizing plate which used the polyvinyl alcohol film containing the azo compound or its metal complex to be produced were produced.
- Example 14 As an azo compound represented by the general formula (2-1), the form of C.I. I. Example 13 is the same as Example 13 except that the azo compound of Compound Example 21 (the trisazo compound represented by the formula (2) described in Example 1 of WO 2005/075572) in place of Direct Red 117 is used.
- the azo compound represented by the general formulas (2-1), (2-2), and (10) and the form of the free acid are represented by the general formula (2-3).
- a polarizing element was produced using a polyvinyl alcohol film containing an azo compound or a metal complex thereof, and a polarizing plate was produced as a measurement sample.
- Example 16 The azo compound of Compound Example 70 (used in Example 17 of WO 2007/148757) as the azo compound in which the form of the free acid is represented by General Formula (2-2), instead of the azo compound of Compound Example 120
- the form of the free acid is represented by the general formulas (2-1), (2-2), and (10
- a polarizing element using a polyvinyl alcohol film which comprises an azo compound represented by each of the azo compound and an azo compound represented by the general formula (2-3) or a metal complex thereof, in which the form of the free acid is It produced and used as a measurement sample.
- Example 17 The azo compound of Compound Example 111 (used in Example 19 of WO 2012/108169) is used as the azo compound of which the form of the free acid is represented by General Formula (2-2), instead of the azo compound of Compound Example 120
- the form of the free acid is represented by each of the general formulas (2-1), (2-2) and (10) Producing a polarizing element using a polyvinyl alcohol film comprising the azo compound represented and the azo compound represented by the general formula (2-3) or the metal complex thereof, and a polarizing plate fabricated It was a measurement sample.
- Example 18 As an azo compound represented by the general formula (2-1), the form of C.I. I. Example 17 and Example 17 are used except that the azo compound of Compound Example 21 (the trisazo compound represented by the formula (2) described in Example 1 of WO 2005/075572) of Compound Example 21 is used instead of Direct Red 117. Similarly, the azo compounds represented by the general formulas (2-1), (2-2) and (10) and the forms of the free acid are represented by the general formula (2-3), respectively. A polarizing element using a polyvinyl alcohol film containing an azo compound or a metal complex thereof and a polarizing plate were produced and used as a measurement sample.
- Example 19 As an azo compound represented by the general formula (2-1), the form of C.I. I. In the same manner as in Example 17 except that the azo compound of Compound Example 34 synthesized in Example 15 was used instead of Direct Red 117, the form of the free acid was a compound represented by the general formula (2-1), (2 Polarizing element using a polyvinyl alcohol film comprising an azo compound represented by-2) and (10) and an azo compound represented by the general formula (2-3) or a metal complex thereof: And a polarizing plate were prepared as a measurement sample.
- Example 20 The azo compound of Compound Example 94 (used in Example 40 of WO 2012/108173 as the azo compound of which the form of the free acid is represented by General Formula (2-2), instead of the azo compound of Compound Example 120
- the form of the free acid is represented by the general formulas (2-1), (2-2), and (10)
- a polarizing element is produced using a polyvinyl alcohol film, which comprises an azo compound represented respectively and an azo compound represented by the general formula (2-3) or a metal complex thereof and the form of a free acid is produced. , And the measurement sample.
- a polarizing element using a polyvinyl alcohol film containing an azo compound represented by the general formula (2-3) or a metal complex thereof and a polarizing plate were produced and used as a measurement sample.
- Example 14 is the same as Example 13 except that the following iodine, iodide treatment, drawing treatment, and iodide treatment are performed after the dyeing step (step of causing the azo compound to be adsorbed to the film) of Example 13 to produce a polarizing element.
- the azo compound represented by the general formulas (2-1), (2-2), and (10) and the form of the free acid are represented by the general formula (2-3).
- a polarizing element was produced using a polyvinyl alcohol film containing an azo compound or a metal complex thereof, and a polarizing plate was produced as a measurement sample.
- the iodine, iodide treatment, stretching treatment and iodide treatment after the dyeing step were carried out as follows. That is, first, 28.6 g / l boric acid (manufactured by Societa Chimica Larderello spa), 28.6 g / l, iodine (manufactured by Junsei Chemical Co., Ltd.) 0.25 g / l, in which azo compound is adsorbed. The film was immersed in an aqueous solution at 30 ° C.
- Comparative Example 7 A polarizing element is produced in the same manner as in Example 13 except that the composition of the azo compound in Example 13 is changed to the composition of the azo compound described in Example 2 of JP-A No. 11-218611, and a polarizing plate is prepared. The produced and produced polarizing plate was used as a measurement sample.
- Comparative Example 8 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 13 except that the composition of the azo compound in Example 13 is changed to the composition of the azo compound described in Example 3 of Japanese Patent No. 4162334. The produced polarizing plate was used as a measurement sample.
- Comparative Example 9 As the azo compound represented by the general formula (2-1), the form of C.I. I. In place of the direct red 117, representative example No. 1 described in JP-A-2003-215338 is disclosed. A polarizing element and a polarizing plate were produced in the same manner as in Example 13 except that the water-soluble dye (azo compound) of 1 was used, and the produced polarizing plate was used as a measurement sample.
- Comparative Example 10 As the azo compound represented by the general formula (2-1), the form of C.I. I. A polarizing element is fabricated and a polarizing plate is produced in the same manner as in Example 13 except that the dye (azo compound) described in Example 1 of JP-A-1-172907 is used instead of the direct red 117. The produced polarizing plate was used as a measurement sample.
- Comparative Example 11 An example of JP-B-64-5623, in which the wavelength of the highest degree of polarization is the same instead of the azo compound of Compound Example 120 as the azo compound in which the form of the free acid is represented by General Formula (2-2)
- a polarizing plate was produced in the same manner as in Example 13 except that a polarizing element having a single transmittance of about 40% was produced, and a polarizing plate was produced, except that the copperated dye (trisazo compound) described in 1 was used. As a measurement sample.
- Comparative Example 12 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 13 except that the composition of the azo compound in Example 13 is changed to the composition of the azo compound described in Example 1 of Japanese Patent No. 4360100. The produced polarizing plate was used as a measurement sample.
- Comparative Example 13 A polarizing element was produced in the same manner as in Comparative Example 3 of JP-A-2006-276236 except that the time of the dyeing process was adjusted so that the polarizing element having a single transmittance of about 41% could be obtained.
- a polarizing plate was produced in the same manner as in Example 13 except that the polarizing element obtained in the present comparative example was used instead of the polarizing element obtained in Example 13, and used as a measurement sample.
- Table 4 shows measurement results of the single transmittance Ys, the single transmittance Yp, the single transmittance Yc, the polarization degree yy, and the contrast value CR in the polarizing plates of Examples 13 to 23 and Comparative Examples 7 to 12.
- the polarizing plates of Examples 13 to 23 according to the second embodiment of the present invention were polarizing plates having improved polarization performance and contrast as compared to the conventional polarizing plate using an azo compound. .
- Table 5 shows initial single-piece transmittance Ys and polarization degree yy when the polarizing plates of Example 13, Example 23, and Comparative Example 13 are held for 1000 hours in an environment of a temperature of 65 ° C. and a humidity of 95%.
- the single transmittance Ys and the degree of polarization yy after 1000 hours are shown.
- the polarizing plates of Example 13 and Example 23 according to the second embodiment of the present invention have high temperature and high humidity (temperature 65 ° C. and humidity 95) as compared with the polarizing plate of Comparative Example 13. %) It was a highly durable polarizing plate with little change in the transmittance and the degree of polarization under the environment.
- the polarizing element and the polarizing plate according to the second embodiment of the present invention have improved optical characteristics and durability. I understand. Therefore, by using this polarizing element or polarizing plate, it is possible to obtain a display device and a polarizing lens which are excellent in polarization characteristics and high in durability.
- the monoazoamino compound of the structural formula (28) thus obtained is added to 400 parts by weight of water, dissolved with sodium hydroxide, and 25.0 parts by weight of a 35% by weight aqueous solution of hydrochloric acid at 10 to 30 ° C. .5 parts by weight was added and stirred for 1 hour at 20 to 30.degree. C. to diazotize.
- the resulting disazoamino compound of the structural formula (29) is added to 200 parts by weight of water, dissolved with sodium hydroxide, and 16.0 parts by weight of a 35% by weight aqueous solution of hydrochloric acid at 20 to 30 ° C. .5 parts by weight was added, and the mixture was stirred at 20 to 30 ° C for 1 hour to be diazotized to obtain a diazotized product of a trisazoamino compound.
- 16.1 parts by weight of 6- (4'-phenylamino) -1-naphthol-3-sulfonic acid was added to 50 parts by weight of water and dissolved as sodium carbonate to obtain a solution.
- Example 2 In the same manner as in Example 1 except that this aqueous solution at 40 ° C. was used instead of the aqueous solution at 40 ° C. used in Example 1, a polarizing element having a single transmittance of about 40% and a film thickness of 15 ⁇ m was produced. At the same time, a polarizing plate was produced and used as a measurement sample.
- the azo compound in which the form of the free acid contains the azo compound represented by the general formula (3-1) or its cupric compound, and further represented by the general formulas (3-3) and (10) A polarizing element and a polarizing plate using a polyvinyl alcohol film containing the above were produced.
- Example 25 As the azo compound in which the form of the free acid is represented by the general formula (3-3), C.I. I. In place of 0.64 parts by weight of Direct Red 81 (azo compound of Compound Example 1), C.I. I. A polarizing element is produced in the same manner as in Example 24 except that 0.50 parts by weight of Direct Red 117 (azo compound of Compound Example 2) is used, and the polarizing plate according to the third embodiment of the present invention.
- Example 26 As the azo compound in which the form of the free acid is represented by the general formula (3-3), C.I. I.
- the azo compound of Compound Example 22 (the azo compound described in Example 2 of Patent No. 4662853) in place of 0.64 parts by weight of Direct Red 81 (azo compound of Compound Example 1) 0.88 parts by weight
- a polarizing element was produced in the same manner as in Example 24 except that a polarizer was produced, and the produced polarizing plate was used as a measurement sample.
- Example 24 As the azo compound in which the form of the free acid is represented by the general formula (3-3), C.I. I. Example 24 was carried out in the same manner as Example 24 except that 1.3 parts by weight of the azo compound of Compound Example 34 obtained by synthesis was used instead of 0.64 parts by weight of Direct Red 81 (the azo compound of Compound Example 1). As a result, a polarizing element was produced and a polarizing plate was produced, and the produced polarizing plate was used as a measurement sample.
- the azo compound represented by the general formula (3-1) or the copper thereof in the form of a free acid A polarizing element having a single transmittance of about 40% using a polyvinyl alcohol film containing an azo compound in which the form of the free acid and the free acid are respectively represented by the general formulas (3-3) and (10) is produced and polarized A plate was produced and used as a measurement sample.
- the azo compound of the form of the free acid represented by the general formula (3-1) or the form of the cupric compound thereof and the free acid is represented by the general formula
- a polarizing element having a single transmittance of about 40% using a polyvinyl alcohol film containing an azo compound represented by 3-3) was produced, and a polarizing plate was produced as a measurement sample.
- Example 27 is the same as Example 27 except that the following iodine, iodide treatment, drawing treatment, and iodide treatment are performed after the dyeing step (step of causing the azo compound to be adsorbed to the film) of Example 27 to prepare a polarizing element.
- a polarizing element having a unitary transmittance of about 40% using a polyvinyl alcohol film and a polarizing plate was produced as a measurement sample.
- the iodine, iodide treatment, stretching treatment and iodide treatment after the dyeing step were carried out as follows. That is, first, 28.6 g / l boric acid (manufactured by Societa Chimica Larderello spa), 28.6 g / l, iodine (manufactured by Junsei Chemical Co., Ltd.) 0.25 g / l, in which azo compound is adsorbed. The film was immersed in an aqueous solution at 30 ° C.
- Example 31 The azo compound of Compound Example 151 is substituted for the azo compound of Compound Example 143 used in Example 26 as the azo compound of which the form of the free acid is represented by General Formula (3-1) or a copper compound thereof
- a polarizing element and a polarizing plate were produced in the same manner as in Example 26 except that 1.43 parts by weight of the compound was used, and the produced polarizing plate was used as a measurement sample.
- Example 32 The C.I. used as the azo compound represented by the general formula (3-3) is a form of the free acid.
- the following structural formula In the same manner as in Example 24, except that the azo compound represented by (Disazo compound of compound No. 1 described in Synthesis Example 1 of JP-A-2003-215338) was used, the form of the free acid A polarizing element is produced using a polyvinyl alcohol film containing an azo compound represented by the general formula (3-1) or a copper compound thereof and having a single transmittance of about 40% using a polyvinyl alcohol film, and a polarizing plate is produced. did.
- Example 33 The C.I. used as the azo compound represented by the general formula (3-3) is a form of the free acid.
- I. instead of 0.64 parts by weight of Direct Red 81 (azo compound of Compound Example 1), the following structural formula In the same manner as in Example 24 except that 1.35 parts by weight of the azo compound represented by the formula (disazo compound of the formula (24) described in WO 2007/145210) was used.
- a polarizing element is produced using a polyvinyl alcohol film containing an azo compound represented by the general formula (3-1) or a copper compound thereof and having a single transmittance of about 40% using a polyvinyl alcohol film, and a polarizing plate is produced.
- Comparative Example 14 A polarizing element is produced in the same manner as in Example 24 except that the composition of the azo compound in Example 24 is changed to the composition of the azo compound described in Example 2 of JP-A No. 11-218611, and the polarizing plate is The produced and produced polarizing plate was used as a measurement sample.
- Comparative Example 15 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 24 except that the composition of the azo compound in Example 24 is changed to the composition of the azo compound described in Example 3 of Japanese Patent No. 4162334. The produced polarizing plate was used as a measurement sample.
- Comparative Example 16 As the azo compound represented by the general formula (3-3), the form of C.I. I. In place of the direct red 81, the compound No. 1 described in Synthesis Example 1 of JP-A-2003-215338 is used. Using the disazo compound of 1, and replacing the azo compound of Example 143 as Compound azo compound of which the form of the free acid is represented by the general formula (3-1) or its copper compound with Structural formula (30) In the same manner as in Example 24 except that 1.0 part by weight of the azo compound represented by was used, a polarizing element having an individual transmittance of about 40% using a polyvinyl alcohol film was produced and a polarizing plate was produced. The produced polarizing plate was used as a measurement sample.
- Comparative Example 17 As the azo compound represented by the general formula (3-3), the form of C.I. I. Instead of the direct red 81, the azo compound described in Example 1 of JP-A-1-172907 is used, and the azo compound in which the form of the free acid is represented by the general formula (3-1) Or in the same manner as in Example 24 except that 0.95 parts by weight of the azo compound represented by the above structural formula (30) was used instead of 1.3 parts by weight of Compound Example 143 as the copperated product thereof. Then, a polarizing element having a single transmittance of about 40% was produced and a polarizing plate was produced, and the produced polarizing plate was used as a measurement sample.
- Comparative Example 18 As the azo compound represented by the general formula (3-3), the form of C.I. I. Instead of the direct red 81, the trisazo dye of the formula (2) described in Example 1 of Japanese Patent No. 2622748 is used, and the form of the free acid is represented by the general formula (3-1) Example 24 except that 0.88 parts by weight of the azo compound represented by the structural formula (30) is used instead of 1.3 parts by weight of the azo compound of Compound Example 143 as the azo compound or its copper compound Similarly to the above, a polarizing element having a single transmittance of about 40% was produced, and a polarizing plate was produced, and the produced polarizing plate was used as a measurement sample.
- Comparative Example 19 The formula described in Example 1 of Japanese Patent No. 262748 is substituted for the azo compound of the compound example 143 as the azo compound represented by the general formula (3-1) or its copper compound as the form of the free acid
- a polarizing element having a single transmittance of about 40% was produced in the same manner as in Example 24 except that the trisazo dye of 2) was used, and a polarizing plate was produced, and the produced polarizing plate was used as a measurement sample.
- Comparative Example 20 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 24 except that the composition of the azo compound in Example 24 is changed to the composition of the azo compound described in Example 1 of Patent No. 4360100. The produced polarizing plate was used as a measurement sample.
- Comparative Example 21 A polarizing element was produced in the same manner as in Comparative Example 3 of JP-A-2006-276236 except that the time of the dyeing process was adjusted so that a polarizing element having a single transmittance of about 40.5% was obtained.
- a polarizing plate was produced as a measurement sample in the same manner as in Example 24 except that the polarizing element obtained in the present comparative example was used instead of the polarizing element obtained in Example 24.
- Table 6 shows the transmissivity correction single transmittance Ys, the visibility correction parallel transmittance Yp, the visibility correction orthogonal transmittance Yc, the polarization degree) y (%) of the polarizing plates of Examples 24 to 33 and Comparative Examples 14 to 20. And the measurement result of contrast value CR is shown.
- the polarizing plates of Examples 24 to 33 according to the third embodiment of the present invention were polarizing plates having improved polarization performance and contrast.
- the polarizing plate of Example 24 according to the third embodiment of the present invention has a high temperature and high humidity (temperature 85 ° C. and humidity 85) as compared with the polarizing plates of Comparative Example 14 and Comparative Example 15. %) It was a highly durable polarizing plate with little change in transmittance under the environment.
- Table 8 shows initial single-piece transmittance Ys and polarization degree yy when the polarizing plates of Example 28, Example 30, and Comparative Example 21 are held for 1000 hours in an environment of a temperature of 65 ° C. and a humidity of 95%.
- the single transmittance Ys and the degree of polarization yy after 1000 hours are shown.
- the polarizing plates of Example 28 and Example 30 according to the third embodiment of the present invention have high temperature and high humidity (temperature 65 ° C. and humidity 95) as compared with the polarizing plate of comparative example 21. %) It was a highly durable polarizing plate with little change in the transmittance and the degree of polarization under the environment.
- the polarizing element and the polarizing plate according to the third embodiment of the present invention have improved optical characteristics and durability. I understand. Therefore, a display device or a polarizing lens using this polarizing element or polarizing plate can have good polarization characteristics and durability.
- the resulting azo compound of the structural formula (31) is added to 200 parts by weight of water, dissolved with sodium hydroxide, and 16.0 parts by weight of a 35% by weight aqueous solution of hydrochloric acid is added at 20 to 30 ° C., and then sodium nitrite is added The mixture was stirred at 20-30 ° C. for 1 hour and diazotized to obtain a diazotized monoazoamino compound.
- 6- (4'-aminobenzoylamino) -1-naphthol-3-sulfonic acid is added to 50 parts by weight of water so as to be equimolar to the azo compound of the structural formula (31), and sodium carbonate weakly alkaline Dissolve as to give a solution.
- Example 2 In the same manner as in Example 1 except that this aqueous solution at 40 ° C. was used instead of the aqueous solution at 40 ° C. used in Example 1, a polarizing element having a single transmittance of about 40% and a film thickness of 15 ⁇ m was produced. At the same time, a polarizing plate was produced and used as a measurement sample. A polarizing element using a polyvinyl alcohol film containing the azo compound represented by each of the general formula (2-1), the general formula (4-2) and the general formula (10) or a salt thereof by the above method A polarizing plate was produced.
- Example 35 [Synthesis of Azo Compound of Compound Example 159]
- Example 156 in Example 34 except using 6-phenylamino-1-naphthol-3-sulfonic acid in place of 6- (4′-aminobenzoylamino) -1-naphthol-3-sulfonic acid
- the azo compound of Compound Example 159 was synthesized as the azo compound represented by General Formula (4-2) or a salt thereof in the same manner as in the synthesis of the azo compound.
- Example 36 [Synthesis of Azo Compound of Compound Example 158] Example except using 6- (4'-hydroxyphenylazo) -1-naphthol-3-sulfonic acid instead of 6- (4'-aminobenzoylamino) -1-naphthol-3-sulfonic acid In the same manner as in the synthesis of the azo compound of Compound Example 156 in 34, the azo compound of Compound Example 158 was synthesized as the azo compound represented by General Formula (4-2) or a salt thereof.
- the azo compound represented by the general formula (4-2) or a salt thereof is used using the azo compound of the compound example 158 in place of the azo compound of the compound example 156
- a polarizer containing azo compound represented by each of the general formula (10) or a salt thereof and using a polyvinyl alcohol film and having a single transmittance of about 40% and a polarizing plate are manufactured and measured. It was a sample.
- a compound represented by the general formula (Example 34) is the same as Example 34 except using the azo compound of Compound Example 161 in place of the azo compound of Compound Example 156 as the azo compound represented by General Formula (4-2) or a salt thereof.
- Example 38 [Synthesis of Azo Compound of Compound Example 166] A compound of the general formula (A) was prepared in the same manner as in the synthesis of the azo compound of compound example 161 in Example 37, except that 7-aminonaphthalene-1,3-disulfonic acid was used instead of 4-aminobenzene-1-sulfonic acid.
- the azo compound of Compound Example 166 was synthesized as the azo compound represented by 4-2) or a salt thereof.
- a compound represented by the general formula (Example 34) is the same as Example 34, except using the azo compound of Compound Example 166 in place of the azo compound of Compound Example 156 as the azo compound represented by General Formula (4-2) or a salt thereof.
- Example 39 As the azo compound represented by the general formula (2-1) or a salt thereof, the azo compound of Compound Example 22 is replaced with the sodium salt of the azo compound of Compound Example 22 (described in Example 2 of Japanese Patent No. 4662853)
- the azo compound represented by each of the general formula (2-1), the general formula (4-2) and the general formula (10) or the same as in Example 37 except that the azo compound is used A polarizing element containing a salt and having a single transmittance of about 40% using a polyvinyl alcohol film was produced, and a polarizing plate was produced as a measurement sample.
- Example 40 As the azo compound represented by the general formula (2-1) or a salt thereof, the following structural formula is used instead of the azo compound of Compound Example 34 C. represented by I.
- Example 41 As the azo compound represented by the general formula (2-1) or a salt thereof, the following structural formula is used instead of the azo compound of Compound Example 34 In the same manner as in Example 37 except that the azo compound represented by (water-soluble dye of the trisazo compound of compound No. 2 described in Synthesis Example 2 of Japanese Patent No. 4162334) was used. -1), a polarizing element having a unit transmittance of about 40% using a polyvinyl alcohol film, containing an azo compound or a salt thereof represented by each of the general formula (4-2) and the general formula (10) While producing it, a polarizing plate was produced and used as a measurement sample.
- Comparative Example 22 A polarizing element is produced in the same manner as in Example 34 except that the composition of the azo compound in Example 34 is changed to the composition of the azo compound described in Example 2 of JP-A No. 11-218611, and a polarizing plate is prepared. It produced and used as a measurement sample.
- Comparative Example 23 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 34 except that the composition of the azo compound in Example 34 is changed to the composition of the azo compound described in Example 3 of Japanese Patent No. 4162334. , And the measurement sample.
- Comparative Example 24 In place of the azo compound of Compound Example 34 as the azo compound represented by General Formula (2-1) or a salt thereof, Compound No. 4 described in Synthesis Example 1 of JP-A No. 2003-215338 is disclosed. In the same manner as in Example 34 except that the disazo compound of 1 is used, the azo compound represented by each of the general formula (4-2) and the general formula (10) or a salt thereof and another organic dye A polarizing element having a unitary transmittance of about 40% using a polyvinyl alcohol film to be contained was produced, and a polarizing plate was produced as a measurement sample.
- Comparative Example 25 Using the azo compound described in Example 1 of JP-A No. 1-172907 instead of the azo compound of Compound Example 34 as the azo compound represented by the general formula (2-1) or a salt thereof A polyvinyl alcohol film containing an azo compound represented by each of the general formula (4-2) and the general formula (10) or a salt thereof and another organic dye is used in the same manner as in Example 34 except for the following. A polarizing element having a single transmittance of about 40% was produced, and a polarizing plate was produced as a measurement sample.
- Comparative Example 26 A trisazo dye of the formula (2) described in Example 1 of Japanese Patent No. 2622748 in place of the azo compound of Compound Example 34 as the azo compound represented by the general formula (2-1) or a salt thereof
- Polyvinyl alcohol containing an azo compound represented by the general formula (4-2) and the general formula (10) or a salt thereof and another organic dye in the same manner as in Example 34 except for using A polarizing element having a single transmittance of about 40% using a film was produced, and a polarizing plate was produced as a measurement sample.
- Comparative Example 27 In place of the azo compound of Compound Example 156 as the azo compound represented by the general formula (4-2) or a salt thereof, the trisazo dye of the formula (2) described in Example 1 of Japanese Patent No. 2622748 A polyvinyl alcohol containing an azo compound represented by the general formula (2-1) and the general formula (10) or a salt thereof and another organic dye in the same manner as in Example 36 except for using A polarizing element having a single transmittance of about 40% using a film was produced, and a polarizing plate was produced as a measurement sample.
- Comparative Example 28 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 34 except that the composition of the azo compound in Example 34 is changed to the composition of the azo compound described in Example 1 of Japanese Patent No. 4360100. , And the measurement sample.
- Comparative Example 29 A polarizing element was produced in the same manner as in Comparative Example 3 of JP-A-2006-276236 except that the time of the dyeing process was adjusted so that a polarizing element having a single transmittance of about 40.5% was obtained.
- a polarizing plate was produced as a measurement sample in the same manner as in Example 34 except that the polarizing element obtained in the present comparative example was used instead of the polarizing element obtained in Example 34.
- Table 9 shows measurement results of single transmittance Ys, parallel transmittance Yp, orthogonal transmittance Yc, polarization degree ⁇ y, and contrast value CR in the polarizing plates of Examples 34 to 42 and Comparative Examples 22 to 28.
- the polarizing plates of Examples 34 to 42 according to the fourth embodiment of the present invention were polarizing plates having improved polarization performance.
- Table 10 shows initial optical characteristics and optical characteristics after 1000 hours when the polarizing plates of Example 37 and Comparative Example 29 are held for 1000 hours in an environment of a temperature of 65 ° C. and a humidity of 95%.
- the polarizing plate of Example 37 according to the fourth embodiment of the present invention has small changes in transmittance and polarization degree under high temperature and high humidity (temperature 65 ° C. and humidity 95%) environment It was a highly durable polarizing plate.
- the polarizing element and the polarizing plate according to the fourth embodiment of the present invention have improved optical characteristics and durability. I understand. Therefore, a display device or a polarizing lens using this polarizing element or polarizing plate can have good polarization characteristics and durability.
- Compound (0.70 parts by weight of the azo compound of formula (2) described in Example 1 of WO 2007/138980) 1.0 part by weight of sodium tripolyphosphate, and 1.0 part by weight of anhydrous sodium sulfate , Mixed with 2000 parts by weight of water Te, to prepare an aqueous solution of 40 ° C..
- Example 2 In the same manner as in Example 1 except that this aqueous solution at 40 ° C. was used instead of the aqueous solution at 40 ° C. used in Example 1, a polarizing element having a single transmittance of about 40% and a film thickness of 15 ⁇ m was produced. At the same time, a polarizing plate was produced and used as a measurement sample.
- the azo compound in which the form of the free acid is represented by the general formulas (5-1) and (10) and the azo compound in which the form of the free acid is represented by the general formula (5-2) The polarizing element and polarizing plate which used the polyvinyl alcohol film containing a complex were produced.
- Example 44 Sodium salt of the azo compound of Compound Example 194 in place of the sodium salt of the azo compound of Compound Example 174 as the azo compound of which the form of the free acid is represented by the general formula (5-2) or the metal complex thereof
- the form of the free acid is represented by the general formulas (5-1) and (10) Producing a polarizing element using a polyvinyl alcohol film comprising the azo compound represented and the azo compound represented by the general formula (5-2) or the metal complex thereof, and a polarizing plate fabricated It was a measurement sample.
- Example 45 Sodium salt of the azo compound of Compound Example 182 in place of the sodium salt of the azo compound of Compound Example 174 as the azo compound of which the form of the free acid is represented by the general formula (5-2) or a metal complex thereof (Patent No. 3661238 Azo compounds in which the form of the free acid is represented by the general formulas (5-1) and (10) in the same manner as in Example 43 except that the tetrakisazo compound described in Example 3 of the gazette is used. A polarizing element was produced using a polyvinyl alcohol film containing an azo compound or a metal complex thereof in which the form of free acid is represented by the general formula (5-2), and a polarizing plate was produced as a measurement sample.
- Example 46 The following structural formula is used instead of the sodium salt of the azo compound of Compound Example 22 as the azo compound in which the form of the free acid is represented by General Formula (5-1). C. represented by I.
- the azo compound in which the form of the free acid is represented by each of Formulas (5-1) and (10) and the form of the free acid are represented by A polarizing element was produced using a polyvinyl alcohol film containing the azo compound represented by (5-2) or a metal complex thereof, and a polarizing plate was produced as a measurement sample.
- Example 47 The azo compound of Compound Example 20 in place of the sodium salt of the azo compound of Compound Example 22 as the azo compound of which the form of the free acid is represented by General Formula (5-1) (3.
- the azo compound represented by) is used except that the form of the free acid is represented by the general formulas (5-1) and (10), respectively.
- a polarizing element was produced using a polyvinyl alcohol film containing an azo compound whose form is represented by the general formula (5-2) or a metal complex thereof, and a polarizing plate was produced as a measurement sample.
- Example 48 In an aqueous solution at 40 ° C. containing the three azo compounds prepared in Example 46, 0.4 weight by weight of the tetrakis azo compound represented by the formula (17) described in Example 1 of WO 2012/108169 is further added.
- the azo compound in which the form of the free acid was represented by each of Formulas (5-1) and (10) and the form of the free acid were represented by While producing the polarizing element using the polyvinyl alcohol film containing the azo compound or its metal complex represented by these, and producing a polarizing plate, it was set as the measurement sample.
- the tetrakisazo compound of Compound Example 34 is used in place of the sodium salt of the azo compound of Compound Example 22 as the azo compound of which the form of the free acid is represented by General Formula (5-1), and the form of the free acid is As the azo compound represented by the general formula (5-2) or the metal complex thereof, the azo compound of Compound Example 195 in place of the sodium salt of the azo compound of Compound Example 174 (No. 4 in Table 1 of Patent No.
- Example 50 Sodium salt of the azo compound of Compound Example 194 as the azo compound of which the form of the free acid is represented by the general formula (5-2) or the metal complex thereof, instead of the azo compound of Compound Example 195 (Japanese Patent Laid-Open No.
- Example 10-259311 In the same manner as in Example 49 except that the azo compound of the formula (10) described in Example 6 of Example 6 was used, the form of the free acid was represented by the general formulas (5-1) and (10) A polarizing element is produced using a polyvinyl alcohol film, and a polarizing plate produced using a polyvinyl alcohol film containing an azo compound and an azo compound of which the form of a free acid is represented by the general formula (5-2) or a metal complex thereof And
- a polarizing element is produced using a polyvinyl alcohol film containing an azo compound and an azo compound of which the form of a free acid is represented by the general formula (5-2) or a metal complex thereof, and a polarizing plate is produced. did.
- Example 52 The azo compound of Compound Example 196 in place of the sodium salt of the azo compound of Compound Example 194 as the azo compound of which the form of the free acid is represented by General Formula (5-2) or the metal complex thereof (WO 2012/108169 And the azo compound represented by the general formulas (5-1) and (10) in the same manner as in Example 51 except that the azo compound of the formula (50) described in (1) is used
- a polarizing element was produced using a polyvinyl alcohol film, which contains an azo compound of which the form of the free acid is represented by the general formula (5-2) or a metal complex thereof, and a polarizing plate was produced as a measurement sample.
- Example 46 is the same as Example 46 except that the following iodine, iodide treatment, stretching treatment, and iodide treatment are performed to produce a polarizing element after the dyeing step (step of causing the azo compound to be adsorbed to a film) of Example 46 And the azo compound in which the form of the free acid is represented by each of the general formulas (5-1) and (10) and the azo compound in which the form of the free acid is represented by the general formula (5-2) or a metal complex thereof A polarizing element having a unitary transmittance of about 40% using a polyvinyl alcohol film and a polarizing plate was produced as a measurement sample.
- the iodine, iodide treatment, stretching treatment and iodide treatment after the dyeing step were carried out as follows. That is, first, 28.6 g / l boric acid (manufactured by Societa Chimica Larderello spa), 28.6 g / l, iodine (manufactured by Junsei Chemical Co., Ltd.) 0.25 g / l, in which azo compound is adsorbed. The film was immersed in an aqueous solution at 30 ° C.
- Comparative Example 30 A polarizing element is produced in the same manner as in Example 43 except that the composition of the azo compound in Example 43 is changed to the composition of the azo compound described in Example 2 of JP-A No. 11-218611, and a polarizing plate is prepared. The produced and produced polarizing plate was used as a measurement sample.
- Comparative Example 31 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 43 except that the composition of the azo compound in Example 43 is changed to the composition of the azo compound described in Example 3 of Japanese Patent No. 4162334. The produced polarizing plate was used as a measurement sample.
- Comparative Example 32 Compound synthesized in Synthesis Example 1 of JP-A-2003-215338 in place of the sodium salt of the azo compound of Compound Example 22 as the azo compound in which the form of the free acid is represented by General Formula (5-1) No.
- a polarizing element was produced in the same manner as in Example 43 except that the disazo compound of 1 was used, and a polarizing plate was produced, and the produced polarizing plate was used as a measurement sample.
- Comparative Example 33 As the azo compound represented by the general formula (5-1), the form of C.I. I. A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 46 except for using the azo compound described in Example 1 of JP-A-1-172907 instead of the direct red 117. The produced polarizing plate was used as a measurement sample.
- a polarizing element and a polarizing plate were produced in the same manner as in Example 43 except that the dye (azo compound) described in Example 1 of the gazette was used, and the produced polarizing plate was used as a measurement sample.
- Comparative Example 35 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 43 except that the composition of the azo compound in Example 43 is changed to the composition of the azo compound described in Example 1 of Japanese Patent No. 4360100. The produced polarizing plate was used as a measurement sample.
- Comparative Example 36 instead of the azo compound of Compound Example 174 as the azo compound represented by the general formula (5-2), the form of the free acid is an azo compound showing an identical blue color in a polarizing element as described in WO2009 / 154055 A polarizing element and a polarizing plate were produced in the same manner as in Example 43 except that the dye (azo compound) described as the specific example (13) of the compound was used, and the produced polarizing plate was used as a measurement sample did.
- the dye (azo compound) described as the specific example (13) of the compound was used, and the produced polarizing plate was used as a measurement sample did.
- Comparative Example 37 A polarizing element was produced in the same manner as in Comparative Example 3 of JP-A-2006-276236 except that the time of the dyeing process was adjusted so that the polarizing element having a single transmittance of about 41% could be obtained.
- a polarizing plate was produced as a measurement sample in the same manner as in Example 43 except that the polarizing element obtained in the present comparative example was used instead of the polarizing element obtained in Example 43.
- Table 11 shows measurement results of single transmittance Ys, parallel transmittance Yp, orthogonal transmittance Yc, polarization degree yy, and contrast value CR in the polarizing plates of Examples 43 to 54 and Comparative Examples 30 to 36.
- the polarizing plates of Examples 43 to 54 according to the fifth embodiment of the present invention were polarizing plates having improved polarization performance.
- Table 12 shows initial single-piece transmittance Ys and polarization degree yy when the polarizing plates of Example 44, Example 54, and Comparative Example 37 are held for 1000 hours in an environment of a temperature of 65 ° C. and a humidity of 95%.
- the single transmittance Ys and the degree of polarization yy after 1000 hours are shown.
- the polarizing plates of Example 44 and Example 54 according to the fifth embodiment of the present invention have high temperature and high humidity (temperature 65 ° C. and humidity 95) as compared with the polarizing plate of Comparative Example 37. %) It was a highly durable polarizing plate with little change in the transmittance and the degree of polarization under the environment.
- the polarizing element and the polarizing plate according to the fifth embodiment of the present invention have improved optical characteristics and durability. I understand. Therefore, a display device or a polarizing lens using this polarizing element or polarizing plate can have good polarization characteristics and durability.
- Compound example 65 as an azo compound in which 1.5 parts by weight of the azo compound represented by the formula (10) described in Example 7 and the form of the free acid is represented by the general formula (10) 0.98 parts by weight of the azo compound (azo compound shown by the formula (2) described in Example 1 of WO 2007/138980) and the form of the free acid are represented by the general formula (6-5) 1.2 parts by weight of the azo compound of Compound Example 111 (the compound of the formula (17) synthesized in Example 1 of WO 2012/108169) as an azo compound to be added and 1.0 weight of sodium tripolyphosphate Parts and anhydrous sodium sulfate And arm 1.0 part by weight, were mixed with water 2000 parts by weight, to prepare an aqueous solution of 40 ° C..
- Example 2 In the same manner as in Example 1 except that this aqueous solution at 40 ° C. was used instead of the aqueous solution at 40 ° C. used in Example 1, a polarizing element having a single transmittance of about 40% and a film thickness of 15 ⁇ m was produced. At the same time, a polarizing plate was produced and used as a measurement sample.
- the azo compounds represented by the general formulas (6-1), (10), and (6-5) and the forms of the free acids are represented by the general formula (6-2).
- the polarizing element and polarizing plate which used the polyvinyl alcohol film containing the azo compound or its metal complex to be produced were produced.
- Example 56 As an azo compound in which the form of the free acid is represented by the general formula (6-1), C.I. I. Example 55 is the same as Example 55 except that the azo compound of Compound Example 21 (the trisazo compound represented by the formula (2) described in Example 1 of WO 2005/075572) of Compound Example 21 is used instead of Direct Red 117. Similarly, the azo compounds represented by the general formulas (6-1), (10) and (6-5) and the forms of the free acid are represented by the general formula (6-2), respectively. A polarizing element using a polyvinyl alcohol film containing an azo compound or a metal complex thereof and a polarizing plate were produced and used as a measurement sample.
- the form of the free acid is a compound represented by general formulas (6-1) and (10)
- a polarizing element is produced using a polyvinyl alcohol film, which comprises an azo compound represented respectively and an azo compound represented by the general formula (6-2) or a metal complex thereof and the form of the free acid is , And the measurement sample.
- Example 58 The azo compound of Compound Example 218 is substituted for 1.5 parts by weight of the azo compound of Compound Example 217 as an azo compound or a metal complex thereof in which the form of the free acid is represented by General Formula (6-2) (WO 2007/145210) Compound Example 111 as an azo compound in which the form of the free acid is represented by General Formula (6-5), using 1.5 parts by weight of the azo compound represented by the formula (12) described in Example 9 of Using 1.2 parts by weight of the azo compound of Compound Example 120 (trisazo dye represented by the formula (2) described in Example 1 of JP-A-3-12606) instead of 1.2 parts by weight of the azo compound of C.
- Example 59 As an azo compound in which the form of the free acid is represented by the general formula (6-1), C.I. I. Example 57 is the same as Example 57 except that the azo compound of Compound Example 21 (the trisazo compound represented by the formula (2) described in Example 1 of WO 2005/075572) of Compound Example 21 is used instead of Direct Red 117. Similarly, an azo compound in which the form of the free acid is represented by each of the general formulas (6-1) and (10) and an azo compound in which the form of the free acid is represented by the general formula (6-2) or a metal complex thereof As well as producing a polarizing element using a polyvinyl alcohol film and a polarizing plate as a measurement sample.
- Example 60 The azo compound of Compound Example 111 (synthesized in Example 1 of WO 2012/108169) is substituted for the azo compound of Compound Example 120 as the azo compound in which the form of the free acid is represented by General Formula (6-5)
- the form of the free acid is changed to any one of the general formulas (6-1), (10) and (6-5)
- Producing a polarizing element using a polyvinyl alcohol film comprising the azo compound represented and the azo compound in which the form of the free acid is represented by the general formula (6-2) or a metal complex thereof, and a polarizer It was a measurement sample.
- Example 61 As an azo compound in which the form of the free acid is represented by the general formula (6-1), C.I. I. Example 60 and Example 60 are used except that the azo compound of Compound Example 21 (the trisazo compound represented by the formula (2) described in Example 1 of WO 2005/075572) in place of Direct Red 117 is used. Similarly, the azo compounds represented by the general formulas (6-1), (10) and (6-5) and the forms of the free acid are represented by the general formula (6-2), respectively. A polarizing element using a polyvinyl alcohol film containing an azo compound or a metal complex thereof and a polarizing plate were produced and used as a measurement sample.
- Example 62 The azo compound of Compound Example 111 as an azo compound in which the form of the free acid is represented by General Formula (6-5) is not used, and the azo in which the form of the free acid is represented by General Formula (6-1) As a compound, C.I. I.
- the form of the free acid is a compound represented by general formulas (6-1) and (10)
- a polarizing element is produced using a polyvinyl alcohol film, which comprises an azo compound represented respectively and an azo compound represented by the general formula (6-2) or a metal complex thereof and the form of the free acid is , And the measurement sample.
- a polarizing element is produced using a polyvinyl alcohol film containing an azo compound and an azo compound of which the form of a free acid is represented by the general formula (6-2) or a metal complex thereof, and a polarizing plate is produced. did.
- Example 65 It is the same as that of Example 58 except that the following iodine, iodide treatment, drawing treatment, and iodide treatment are carried out after the dyeing step (step of adsorbing the azo compound to the film) of Example 58 to produce a polarizing element.
- the azo compound represented by the general formulas (6-1), (10), and (6-5) and the form of the free acid are represented by the general formula (6-2).
- a polarizing element was produced using a polyvinyl alcohol film containing an azo compound or a metal complex thereof, and a polarizing plate was produced as a measurement sample.
- the iodine, iodide treatment, stretching treatment and iodide treatment after the dyeing step were carried out as follows. That is, first, 28.6 g / l boric acid (manufactured by Societa Chimica Larderello spa), 28.6 g / l, iodine (manufactured by Junsei Chemical Co., Ltd.) 0.25 g / l, in which azo compound is adsorbed. The film was immersed in an aqueous solution at 30 ° C.
- Comparative Example 38 A polarizing element is produced in the same manner as in Example 55 except that the composition of the azo compound in Example 55 is changed to the composition of the azo compound described in Example 2 of JP-A No. 11-218611, and a polarizing plate is prepared. The produced and produced polarizing plate was used as a measurement sample.
- Comparative Example 39 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 55 except that the composition of the azo compound in Example 55 is changed to the composition of the azo compound described in Example 3 of Patent No. 4162334. The produced polarizing plate was used as a measurement sample.
- Comparative Example 40 As the azo compound represented by the general formula (6-1), the form of C.I. I. In place of the direct red 117, representative example No. 1 described in JP-A-2003-215338 is disclosed. Using the water-soluble dye (azo compound) of 1 and replacing the azo compound of Compound Example 111 with the azo compound of Compound Example 111 as the azo compound of which the form of the free acid is represented by A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 55 except that the trisazo dye represented by the formula (2) described in Example 1 of JP-A-3-12606 is used. The produced polarizing plate was used as a measurement sample.
- Comparative Example 41 As the azo compound represented by the general formula (6-1), the form of C.I. I. A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 58 except that the dye (azo compound) described in Example 1 of JP-A-1-172907 is used instead of the direct red 117. The produced polarizing plate was used as a measurement sample.
- Example 55 in place of the azo compound of Compound Example 120 as the azo compound represented by the general formula (6-2) or the metal complex thereof in the form of the free acid, the wavelength with the highest degree of polarization is equivalent
- a polarizing element is produced in the same manner as in Example 55 except that the dye (trisazo compound) described in Example 1 of JP-B-64-5623 is used, and a produced polarizing plate is produced. It was a measurement sample.
- Comparative Example 43 A polarizing element is produced and a polarizing plate is produced in the same manner as in Example 55 except that the composition of the azo compound in Example 55 is changed to the composition of the azo compound described in Example 1 of Patent No. 4360100. The produced polarizing plate was used as a measurement sample.
- Comparative Example 44 A polarizing element was produced in the same manner as in Comparative Example 3 of JP-A-2006-276236 except that the time of the dyeing process was adjusted so that the polarizing element having a single transmittance of about 41% could be obtained.
- a polarizing plate was produced as a measurement sample in the same manner as in Example 55 except that the polarizing element obtained in this Comparative Example was used instead of the polarizing element obtained in Example 55.
- Table 13 shows the measurement results of the single transmittance Ys, the single transmittance Yp, the single transmittance Yc, the polarization degree ⁇ y, and the contrast value CR in the polarizing plates of Examples 55 to 65 and Comparative Examples 38 to 43.
- the polarizing plates of Examples 55 to 65 according to the sixth embodiment of the present invention are polarizing plates having improved polarization performance and contrast as compared with the conventional polarizing plate using an azo compound.
- Table 14 shows initial single-piece transmittance Ys and polarization degree yy when the polarizing plates of Example 55, Example 65, and Comparative Example 44 are held for 1000 hours in an environment of a temperature of 65 ° C. and a humidity of 95%.
- the single transmittance Ys and the degree of polarization yy after 1000 hours are shown.
- the polarizing plates of Example 55 and Example 65 according to the sixth embodiment of the present invention have high temperature and high humidity (temperature 65 ° C. and humidity) as compared with the polarizing plate of Comparative Example 44. 95%) It was a highly durable polarizing plate with few changes in transmittance and polarization degree under the environment.
- the polarizing element and the polarizing plate according to the sixth embodiment of the present invention have improved optical characteristics and durability. I understand. Therefore, by using this polarizing element or polarizing plate, it is possible to obtain a display device and a polarizing lens which are excellent in polarization characteristics and high in durability.
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Abstract
Description
(1)基材と、遊離酸の形が下記一般式(1)
で表されるアゾ化合物並びにその銅化物及び金属錯体(銅化物を除く)とを含み、R5が炭素数1~4のアルコキシ基である場合の前記アゾ化合物の前記銅化物は、そのアルコキシ基中のアルキル基が銅原子に置き換えられ、前記一般式(1)中のナフタレン環上のヒドロキシ基中の酸素原子に前記銅原子が結合したものであってもよく、下記i)~vi)のいずれかの要件を満たすことを特徴とする偏光素子、
i)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイルアミノ基、炭素数1~4のアルコキシ基、スルホ基、ヒドロキシ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基、又は炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいナフトトリアゾール基であり、m及びnが1の場合には、R5及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、又はスルホ基を有する炭素数1~4のアルコキシ基であるアゾ化合物と、遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R4及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R5がメトキシ基であるアゾ化合物とを含む、
ii)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが下記一般式(2)
で表される置換基であるアゾ化合物と、遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、少なくともnが1であり、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、ヒドロキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基、又は炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいナフトトリアゾール基であるアゾ化合物と、遊離酸の形が前記一般式(1)で表されるアゾ化合物又はその金属錯体であって、Aが下記一般式(3)
で表される置換基であり、Xが炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイル基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイルアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、ヒドロキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基、又は炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいナフトトリアゾール基であり、m及びnが0であるアゾ化合物とを含む、
iii)遊離酸の形が前記一般式(1)で表されるアゾ化合物又はその銅化物であって、mが0であり、R3~R6がメトキシ基であり、Xが下記一般式(4)
で表される置換基であるアゾ化合物を少なくとも一種含む、
iv)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが下記一般式(2)
で表される置換基であるアゾ化合物と、遊離酸の形が前記一般式(1)で表されるアゾ化合物の銅化物であって、遊離酸の形が下記一般式(5)
で表され、m及びnが0であり、R6が水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが置換基を有していてもよいアミノ基、置換基を有していてもよいベンゾイル基、又は置換基を有していてもよいフェニルアゾ基であるアゾ化合物とを含む、
v)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R4がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R5及びR6がそれぞれ独立に、水素原子又は炭素数1~4のアルキル基であり、Xが下記一般式(6)
で表される置換基であるアゾ化合物と、遊離酸の形が前記一般式(1)で表されるアゾ化合物又はその金属錯体であって、nが1であり、R1、R2、及びR4がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R3、R5、及びR6がメトキシ基であり、Xが、ヒドロキシ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイル基、ヒドロキシ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイルアミノ基、又はヒドロキシ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基であるアゾ化合物とを含む、
vi)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基を表し、Xが下記一般式(7)
で表される置換基であり、m及びnが1の場合には、R5及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、又はスルホ基を有する炭素数1~4のアルコキシ基であるアゾ化合物と、遊離酸の形が下記一般式(8)
で表されるアゾ化合物又はその金属錯体であって、mが0であり、R3、R4、及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R5がメトキシ基であり、Xが下記一般式(9)
で表される置換基であるアゾ化合物とを含む、
(2)(1)項に記載の偏光素子であって、遊離酸の形が下記一般式(1-1)
で表されるアゾ化合物と、遊離酸の形が下記一般式(1-2)
で表されるアゾ化合物とを含むことを特徴とする偏光素子、
(3)(2)項に記載の偏光素子であって、遊離酸の形が前記一般式(1-2)で表されるアゾ化合物が、遊離酸の形が下記一般式(1-3)
で表されるアゾ化合物であることを特徴とする偏光素子、
(4)(2)項又は(3)項に記載の偏光素子であって、前記一般式(1-2)又は(1-3)中のRb15が、メトキシ基であることを特徴とする偏光素子、
(5)(2)~(4)項のいずれか1項に記載の偏光素子であって、前記一般式(1-2)又は(1-3)中のXb11が、置換基を有していてもよいフェニルアミノ基であることを特徴とする偏光素子、
(6)(2)~(5)項のいずれか1項に記載の偏光素子であって、前記一般式(1-1)中のXr11が、アミノ基及び置換アミノ基からなる群より選択される置換基を有してもよいベンゾイル基、又はアミノ基及び置換アミノ基からなる群より選択される置換基を有してもよいベンゾイルアミノ基であることを特徴とする偏光素子、
(7)(1)項に記載の偏光素子であって、遊離酸の形が下記一般式(2-1)
で表されるアゾ化合物と、遊離酸の形が下記一般式(2-2)
で表されるアゾ化合物と、遊離酸の形が下記一般式(2-3)
で表されるアゾ化合物又はその金属錯体とを含むことを特徴とする偏光素子、
(8)(7)項に記載の偏光素子であって、遊離酸の形が前記一般式(2-3)で表されるアゾ化合物又はその金属錯体が、遊離酸の形が下記一般式(2-4)
で表されるアゾ化合物又はその金属錯体であることを特徴とする偏光素子、
(9)(7)項又は(8)項に記載の偏光素子であって、遊離酸の形が前記一般式(2-2)で表されるアゾ化合物が、遊離酸の形が下記一般式(2-5)
で表されるアゾ化合物であることを特徴とする偏光素子、
(10)(7)~(9)項のいずれか1項に記載の偏光素子であって、前記一般式(2-3)又は(2-4)中のXg21が、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基であることを特徴とする偏光素子、
(11)(7)~(10)項のいずれか1項に記載の偏光素子であって、前記一般式(1)中のXr21が、アミノ基であることを特徴とする偏光素子、
(12)(1)項に記載の偏光素子であって、遊離酸の形が下記一般式(3-1)
で表されるアゾ化合物又はその銅化物を少なくとも一種含むことを特徴とする偏光素子、
(13)(12)項に記載の偏光素子であって、遊離酸の形が一般式(3-1)で表されるアゾ化合物又はその銅化物が、遊離酸の形が下記一般式(3-2)
で表されるアゾ化合物又はその銅化物であることを特徴とする偏光素子、
(14)(12)項又は(13)項に記載の偏光素子であって、遊離酸の形が一般式(3-1)又は(3-2)で表されるアゾ化合物又はその銅化物として、遊離酸の形が一般式(3-1)又は(3-2)で表され銅原子を含まないアゾ化合物を含むことを特徴とする偏光素子、
(15)(12)~(14)項のいずれか1項に記載の偏光素子であって、遊離酸の形が下記一般式(3-3)
で表されるアゾ化合物をさらに含むことを特徴とする偏光素子、
(16)(15)項に記載の偏光素子であって、前記一般式(3-3)中のXr31が、アミノ基であることを特徴とする偏光素子、
(17)(1)項に記載の偏光素子であって、下記一般式(2-1)
で表されるアゾ化合物又はその塩と、下記一般式(4-2)
で表されるアゾ化合物又はその塩とを含むことを特徴とする偏光素子、
(18)(17)項に記載の偏光素子であって、前記一般式(4-2)で表されるアゾ化合物又はその塩が、下記一般式(4-3)
で表されるアゾ化合物又はその塩であることを特徴とする偏光素子、
(19)(17)項又は(18)項に記載の偏光素子であって、前記一般式(4-2)又は(4-3)中のRb41が、メトキシ基であることを特徴とする偏光素子、
(20)(17)~(19)項のいずれか1項に記載の偏光素子であって、前記一般式(4-2)又は(4-3)中のXb41が、置換基を有していてもよいフェニルアミノ基であることを特徴とする偏光素子、
(21)(17)~(20)項のいずれか1項に記載の偏光素子であって、前記一般式(4-1)中のXr41が、アミノ基であることを特徴とする偏光素子、
(22)(1)項に記載の偏光素子であって、遊離酸の形が下記一般式(5-1)
で表されるアゾ化合物と、遊離酸の形が下記一般式(5-2)
で表されるアゾ化合物又はその金属錯体とを含むことを特徴とする偏光素子、
(23)(22)項に記載の偏光素子であって、遊離酸の形が一般式(5-2)で表されるアゾ化合物が、遊離酸の形が下記一般式(5-4)
で表されるアゾ化合物であることを特徴とする偏光素子、
(24)(22)項又は(23)項に記載の偏光素子であって、前記一般式(5-1)中のXr51が、アミノ基であることを特徴とする偏光素子、
(25)(1)項に記載の偏光素子であって、遊離酸の形が下記一般式(6-1)
で表されるアゾ化合物と、遊離酸の形が下記一般式(6-2)
で表されるアゾ化合物又はその金属錯体とを含むことを特徴とする偏光素子、
(26)(25)項に記載の偏光素子であって遊離酸の形が前記一般式(6-2)で表されるアゾ化合物又はその金属錯体が、下記一般式(6-4)
で表されるアゾ化合物又はその金属錯体であることを特徴とする偏光素子、
(27)(25)項又は(26)項に記載の偏光素子であって、遊離酸の形が下記一般式(6-5)
で表されるアゾ化合物をさらに含むことを特徴とする偏光素子、
(28)(27)項に記載の偏光素子であって、遊離酸の形が前記一般式(6-5)で表される化合物が、下記一般式(6-6)
で表されることを特徴とする偏光素子、
(29)(25)~(28)項のいずれか1項に記載の偏光素子であって、前記一般式(6-1)中のXr61が、アミノ基であることを特徴とする偏光素子、
(30)(2)~(29)項のいずれか1項に記載の偏光素子であって、遊離酸の形が下記一般式(10)
で表されるアゾ化合物をさらに含むことを特徴とする偏光素子、
(31)(30)項に記載の偏光素子であって、前記一般式(10)中のAy1が、カルボキシ基又はスルホ基であることを特徴とする偏光素子、
(32)(1)~(31)項のいずれか1項に記載の偏光素子であって、ヨウ素をさらに含むことを特徴とする偏光素子、
(33)(1)~(32)項のいずれか1項に記載の偏光素子であって、前記基材がポリビニルアルコール系の樹脂からなるフィルムであることを特徴とする偏光素子、
(34)(1)~(33)項のいずれか1項に記載の偏光素子と、前記偏光素子の少なくとも片面に設けられた透明保護層とを備えることを特徴とする偏光板、
(35)(1)~(33)項のいずれか1項に記載の偏光素子、又は(34)項に記載の偏光板を備えることを特徴とする表示装置、
に関する。
本発明の偏光素子は、基材と、遊離酸の形が前記一般式(1)で表されるアゾ化合物並びにその銅化物及び金属錯体(銅化物を除く)とを含み、R5が炭素数1~4のアルコキシ基である場合の前記アゾ化合物の前記銅化物は、そのアルコキシ基中のアルキル基が銅原子に置き換えられ、前記一般式(1)中のナフタレン環上のヒドロキシ基中の酸素原子に前記銅原子が結合したものであってもよく、下記i)~vi)のいずれかの要件を満たすものである。
i)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイルアミノ基、炭素数1~4のアルコキシ基、スルホ基、ヒドロキシ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基、又は炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいナフトトリアゾール基であり、m及びnが1の場合には、R5及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、又はスルホ基を有する炭素数1~4のアルコキシ基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R4及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R5がメトキシ基であるアゾ化合物とを含む。
ii)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが前記一般式(2)で表される置換基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、少なくともnが1であり、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、ヒドロキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基、又は炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいナフトトリアゾール基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物又はその金属錯体であって、Aが前記一般式(3)で表される置換基であり、Xが炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイル基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイルアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、ヒドロキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基、又は炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいナフトトリアゾール基であり、m及びnが0であるアゾ化合物とを含む。
iii)遊離酸の形が前記一般式(1)で表されるアゾ化合物又はその銅化物であって、mが0であり、R3~R6がメトキシ基であり、Xが前記一般式(4)で表される置換基であるアゾ化合物を少なくとも一種含む。
iv)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが前記一般式(2)で表される置換基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物の銅化物であって、遊離酸の形が前記一般式(5)で表され、m及びnが0であり、R6が水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが置換基を有していてもよいアミノ基、置換基を有していてもよいベンゾイル基、又は置換基を有していてもよいフェニルアゾ基であるアゾ化合物とを含む。
v)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R4がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R5及びR6がそれぞれ独立に、水素原子又は炭素数1~4のアルキル基であり、Xが前記一般式(6)で表される置換基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物又はその金属錯体であって、nが1であり、R1、R2、及びR4がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R3、R5、及びR6がメトキシ基であり、Xが、ヒドロキシ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイル基、ヒドロキシ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイルアミノ基、又はヒドロキシ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基であるアゾ化合物とを含む。
vi)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基を表し、Xが前記一般式(7)で表される置換基であり、m及びnが1の場合には、R5及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、又はスルホ基を有する炭素数1~4のアルコキシ基であるアゾ化合物と、
遊離酸の形が前記一般式(8)で表されるアゾ化合物又はその金属錯体であって、mが0であり、R3、R4、及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R5がメトキシ基であり、Xが前記一般式(9)で表される置換基であるアゾ化合物とを含む。
本発明の第1の実施形態に係る偏光素子は、基材と、遊離酸の形が前記一般式(1-1)で表されるアゾ化合物と、遊離酸の形が前記一般式(1-2)で表されるアゾ化合物とを含んでいる。遊離酸の形が前記一般式(1-1)で表されるアゾ化合物が、遊離酸の形が前記一般式(1-3)で表されるアゾ化合物である場合、より高い偏光度を有する偏光素子を実現できる。本実施形態の偏光素子は、遊離酸の形が前記一般式(1-1)及び(1-2)でそれぞれ表されるアゾ化合物に加えて、遊離酸の形が前記一般式(10)で表されるアゾ化合物をさらに含むことがより好ましい。これにより、さらに高い偏光度を有する偏光素子を実現できる。遊離酸の形が前記一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物は、前記基材に吸着していることが好ましい。
で表されるアゾ化合物が好ましい。
本発明の第2の実施形態に係る偏光素子は、基材と、遊離酸の形が前記一般式(2-1)で表されるアゾ化合物と、遊離酸の形が前記一般式(2-2)で表されるアゾ化合物と、遊離酸の形が前記一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含んでいる。遊離酸の形が前記一般式(2-3)で表されるアゾ化合物又はその金属錯体が、遊離酸の形が前記一般式(2-4)で表されるアゾ化合物又はその金属錯体である場合、より高い偏光度を有する偏光素子を実現できる。遊離酸の形が前記一般式(2-2)で表されるアゾ化合物が、遊離酸の形が前記一般式(2-5)で表されるアゾ化合物である場合、より高い偏光度を有する偏光素子を実現できる。本実施形態の偏光素子は、遊離酸の形が前記一般式(2-1)及び(2-2)でそれぞれ表されるアゾ化合物並びに遊離酸の形が前記一般式(2-3)で表されるアゾ化合物又はその金属錯体に加えて、遊離酸の形が前記一般式(10)で表されるアゾ化合物を含む場合、さらに高い偏光度を有する偏光素子を実現できる。遊離酸の形が前記一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物、並びに遊離酸の形が前記一般式(2-3)で表されるアゾ化合物又はその金属錯体は、前記基材に吸着していることが好ましい。
、及び
でそれぞれ表される。Mは、銅であるのが好ましい。
本発明の第3の実施形態に係る偏光素子は、基材と、遊離酸の形が前記一般式(3-1)で表されるアゾ化合物又はその銅化物とを含むことが特徴であり、そのアゾ化合物を用いることで特定の波長での性能、特に600nm以上の波長において二色比又は偏光度を向上させることができる。また、本実施形態の偏光素子は、さらに他の種類のアゾ化合物を含んでもよく、さらに他の種類のアゾ化合物を含む場合、特定の波長だけでなく視感度に換算しても偏光性能を向上させることができる。前記他の種類のアゾ化合物は、遊離酸の形が前記一般式(3-3)で表されるアゾ化合物を含むことが好ましい。これにより、さらに視感度として高い偏光度を有する偏光素子を実現できる。前記他の種類のアゾ化合物は、遊離酸の形が前記一般式(3-3)で表されるアゾ化合物に加えて、遊離酸の形が前記一般式(10)で表されるアゾ化合物を含むことが好ましい。これにより、さらに視感度として高い偏光度を有する偏光素子を実現できる。遊離酸の形が前記一般式(3-1)で表されるアゾ化合物又はその銅化物、並びに遊離酸の形が前記一般式(3-3)及び(10)でそれぞれ表されるアゾ化合物は、前記基材に吸着していることが最も好ましい。
で表されるモノアゾアミノ化合物を得る。
で表される芳香族アミン類を公知の方法によりスルホアルキル化して得られるスルホアルコキシアニリン酸類をジアゾ化し、下記一般式(23)
で表されるナフチルアミンスルホン酸類、又はアミノナフトールスルホン酸類を公知の方法によりスルホアルキル化して得られるスルホアルコキシナフチルアミンスルホン酸類をジアゾ化し、前記一般式(23)で表されるアニリン類と一次カップリングさせることによって得られる。
で表されるジスアゾアミノ化合物を得る。
で表されるナフトール類と3次カップリングさせることにより、遊離酸の形が一般式(3-1)又は(3-2)で表されるアゾ化合物又はその銅化物が得られる。
本発明の第4の実施形態に係る偏光素子は、基材と、前記一般式(2-1)で表されるアゾ化合物又はその塩と、前記一般式(4-2)で表されるアゾ化合物又はその塩とを含んでいる。本実施形態の偏光素子は、前記一般式(2-1)及び(4-2)でそれぞれ表されるアゾ化合物又はその塩に加えて、前記一般式(10) で表されるアゾ化合物又はその塩を含むことが好ましい。これにより、さらに高い偏光度を有する偏光素子を実現できる。前記一般式(2-1)、(4-2)、(10)で表されるアゾ化合物又はその塩は、前記基材に吸着していることが好ましい。
で表されるアゾ化合物又はその塩は、遊離酸の形が一般式(2-1)で表されるアゾ化合物として先に説明した通りである。
本発明の第5の実施形態に係る偏光素子は、基材と、遊離酸の形が前記一般式(5-1)で表されるアゾ化合物と、遊離酸の形が前記一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含んでいる。本発明の偏光素子は、遊離酸の形が前記一般式(5-1)で表されるアゾ化合物及び遊離酸の形が前記一般式(5-2)で表されるアゾ化合物又はその金属錯体に加えて、遊離酸の形が前記一般式(10)で表されるアゾ化合物を含むことが好ましい。これにより、さらに高い偏光度を有する偏光素子を実現できる。遊離酸の形が前記一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物、並びに遊離酸の形が前記一般式(5-2)で表されるアゾ化合物又はその金属錯体は、前記基材に吸着していることが好ましい。
、及び
で表される。Mは、銅であるのが好ましい。
本発明の第6の実施形態に係る偏光素子は、基材と、遊離酸の形が前記一般式(6-1)で表されるアゾ化合物と、遊離酸の形が前記一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含んでいる。遊離酸の形が前記一般式(6-2)で表されるアゾ化合物又はその金属錯体が、遊離酸の形が前記一般式(6-4)で表されるアゾ化合物又はその金属錯体である場合、より高い偏光度を有する偏光素子を実現できる。本実施形態の偏光素子は、遊離酸の形が前記一般式(6-1)で表されるアゾ化合物及び遊離酸の形が前記一般式(6-2)で表されるアゾ化合物又はその金属錯体に加えて、遊離酸の形が前記一般式(10)で表されるアゾ化合物を含む場合、さらに高い偏光度を有する偏光素子を実現できる。また、本実施形態の偏光素子は、遊離酸の形が前記一般式(6-1)で表されるアゾ化合物及び遊離酸の形が前記一般式(6-2)で表されるアゾ化合物又はその金属錯体に加えて、遊離酸の形が前記一般式(10)で表されるアゾ化合物を含む場合、特に遊離酸の形が前記一般式(10)及び(6-5)でそれぞれ表されるアゾ化合物の両方を含む場合、さらに高い偏光度を有する偏光素子を実現できる。その場合において、遊離酸の形が前記一般式(6-5)で表されるアゾ化合物が、前記一般式(6-6)で表されるアゾ化合物であると、さらに高い偏光度を有する偏光素子を実現できる。
で表される。遊離酸の形が一般式(6-2)で表されるアゾ化合物の金属錯体は、銅化された金属錯体であること、すなわちMが銅であることが好ましい。
本発明の偏光素子において、色調整等に応じて、遊離酸の形が一般式(1)、(10)などで表されるアゾ化合物並びにその銅化物及び金属錯体以外の他の有機染料(特にアゾ化合物)、例えば非特許文献2に記載のアゾ化合物などを1種以上、遊離酸の形が一般式(1)で表されるアゾ化合物並びにその銅化物及び金属錯体と併用してもよい。併用する他の有機染料は、特に制限されないが、親水性高分子を染色するものであって、遊離酸の形が一般式(1)で表されるアゾ化合物並びにその銅化物及び金属錯体の吸収波長領域と異なる波長領域に吸収特性を有する染料であって、二色性の高いものが好ましい。他の有機染料としては、例えば、非特許文献2に記載のアゾ化合物(例えば、C.I.ダイレクト・イエロー28)や、C.I.ダイレクト・レッド2、C.I.ダイレクト・レッド31、C.I.ダイレクト・レッド79、C.I.ダイレクト・レッド247、C.I.ダイレクト・グリーン80、C.I.ダイレクト・グリーン59、C.I.ダイレクト・ブルー202、C.I.ダイレクト・バイオレット9などのアゾ化合物が挙げられる。これらのアゾ化合物は、遊離酸の形、あるいは、アルカリ金属塩(例えば、ナトリウム塩、カリウム塩、リチウム塩)、アンモニウム塩、アミン類の塩等の塩の形で用いられる。必要に応じて、他の有機染料を併用する場合、目的とする偏光素子が、より中性色な偏光素子、特徴ある色を有する偏光素子、液晶プロジェクター用カラー偏光素子、及びその他のカラー偏光素子の何れであるかにより、それぞれ配合する他の有機染料の種類は異なる。他の有機染料の配合量(2種以上の場合にはそれらの合計配合量)は、特に限定されるものではないが、一般的には、遊離酸の形が一般式(1)、(10)で表されるアゾ化合物並びにその銅化物及び金属錯体の合計量100重量部に対して、0.01~1000重量部の範囲であるのが好ましく、0.1~1000重量部の範囲であるのがより好ましく、また、0.01~10重量部の範囲であるのがより好ましく、0.1~10重量部の範囲であるのがさらに好ましい。
本発明の偏光素子を構成する基材としては、親水性高分子が好ましい。前記親水性高分子としては、特に限定されないが、例えば、ポリビニルアルコール又はその誘導体、アミロース系樹脂、デンプン系樹脂、セルロース系樹脂、ポリアクリル酸塩系樹脂などが挙げられる。本発明のアゾ化合物を含有させる基材として、染色性及び架橋性などから、ポリビニルアルコール又はその誘導体(以下、「ポリビニルアルコール系樹脂」と称する)が最も好ましい。基材をフィルム形状として、本発明のアゾ化合物及び他の配合物をフィルム形状の基材に吸着させ、延伸等の配向処理を適用することによって、本発明の偏光素子を作製できる。
以下、基材がポリビニルアルコール系樹脂からなるフィルムである場合を例にして、具体的な偏光素子の製造方法を説明する。
膨潤度 F=100×β/γ(%) ・・・(v)
本発明の偏光板は、本発明の偏光素子と、前記偏光素子の少なくとも片面に設けられた透明保護層とを備えている。
前記透明保護層は、透明ポリマーによる塗布層として、又は透明フィルムのラミネート層として設けることができる。透明保護層を形成する透明ポリマー又は透明フィルムとしては、機械的強度が高く、熱安定性が良好な透明ポリマー又は透明フィルムが好ましい。透明保護層に用いる透明ポリマー又は透明フィルムとして、例えば、トリアセチルセルロースやジアセチルセルロースのようなセルロースアセテート樹脂又はそのフィルム、アクリル樹脂又はそのフィルム、ポリ塩化ビニル樹脂又はそのフィルム、ナイロン樹脂又はそのフィルム、ポリエステル樹脂又はそのフィルム、ポリアリレート樹脂又はそのフィルム、ノルボルネンのような環状オレフィンをモノマーとする環状ポリオレフィン樹脂又はそのフィルム、ポリエチレン、ポリプロピレン、シクロ系ないしはノルボルネン骨格を有するポリオレフィン又はその共重合体、主鎖又は側鎖がイミド及び/又はアミドの重合体(又は樹脂)又はそのフィルムなどが挙げられる。また、前記透明保護層として、液晶性を有する樹脂又はそのフィルムを設けることもできる。前記保護フィルムの厚みは、例えば、0.5~200μm程度である。偏光素子の片面に樹脂又はフィルムを1層設けてもよく、偏光素子の片面に同種又は異種の樹脂又はフィルムを2層以上設けてもよく、偏光素子の両面に同種又は異種の樹脂又はフィルムを1層以上設けてもよい。
本発明の表示装置は、本発明の偏光素子、又は本発明の偏光板を備えるものである。また、本発明の表示装置は、例えば、液晶セルと、液晶セルの片側又は両側に配置されている本発明の偏光素子又は本発明の偏光板を備える反射型、透過型、又は透過・反射両用型等の液晶表示装置とすることができる。上記液晶セルは、任意であり、例えば、薄膜トランジスタ型に代表されるアクティブマトリクス駆動型の液晶セル、ツイストネマチック型やスーパーツイストネマチック型に代表される単純マトリクス駆動型の液晶セルなどの適宜なタイプの液晶セルを用いたものであって良い。
1枚の偏光板の各波長における透過率を単体透過率Ts、2枚の偏光板をそれらの吸収軸方向が同一となるように重ねた場合の各波長における透過率を平行位透過率Tp、2枚の偏光板をそれらの吸収軸が直交するように重ねた場合の各波長における透過率を直交位透過率Tc、C光源2°視野、色度関数により視感度補正された単体透過率をYs、C光源2°視野、色度関数により視感度補正された平行透過率をYp、C光源2°視野、色度関数により視感度補正された直交透過率をYcとした。視感度補正は、JIS Z 8722:2009に基づいて行った。それぞれの透過率Ts、Tp、Tc、Ys、Yp、及びYcは、分光光度計(株式会社日立ハイテクノロジーズ製の「U-4100」)を用いて、5nm間隔の各波長で測定した。
ρy={(Yp-Yc)/(Yp+Yc)}1/2×100 …(13)
CR=Yp/Yc …(14)
〔実施例1〕
[化合物例38のアゾ化合物の合成]
4-アミノベンゼン-1,3-ジスルホン酸25.3重量部を水500重量部に加え、冷却し10℃以下で、35重量%塩酸水溶液31.3重量部を加え、次に亜硝酸ナトリウム6.9重量部を加え、5~10℃で1時間攪拌し、ジアゾ化した。そこへ、1次カップラーとして、希塩酸水溶液に溶解した3-メチルアニリン10.7重量部を加え、10~30℃で攪拌しながら、炭酸ナトリウムを加えてpH3とし、さらに攪拌してカップリング反応を完結させ、濾過し、下記構造式(15)
基材としてのケン化度が99%以上で膜厚が40μmのポリビニルアルコールフィルム(株式会社クラレ製の「VF-PE♯4000」;以下、単に「フィルム」と称する)を35℃の温水に3分間浸漬し膨潤処理をした。遊離酸の形が一般式(1-1)で表されるアゾ化合物としての化合物例2のアゾ化合物であるC.I.ダイレクト・レッド117を0.2重量部と、遊離酸の形が一般式(1-2)で表されるアゾ化合物としての化合物例38のアゾ化合物1.5重量部と、遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物(国際公開第2007/138980号の実施例1に記載の式(2)のアゾ化合物)0.3重量部と、トリポリ燐酸ナトリウム1.0重量部と、水2000重量部とを混合して、40℃の水溶液を調製した。この40℃の水溶液に膨潤処理したフィルムを浸漬し、アゾ化合物をフィルムに吸着させた。
得られた偏光素子の両面に対して、アルカリ処理した膜厚80μmのトリアセチルセルロースフィルム(富士写真フイルム株式会社製の「TD-80U」;以下、「TAC」と略記する)を、ポリビニルアルコール接着剤を用いて接着することにより、TAC/接着層/偏光素子/接着層/TACという構成で積層(ラミネート)した。これにより、偏光板を得た。得られた偏光板を測定試料とした。
[化合物例56のアゾ化合物の合成]
4次カップラーとして、6-フェニルアミノ-1-ナフトール-3-スルホン酸16.1重量部に代えて、下記構造式(18)
[偏光素子及び偏光板の作製]
遊離酸の形が一般式(1-2)で表されるアゾ化合物として、化合物例38のアゾ化合物に代えて化合物例56のアゾ化合物を使用したこと以外は、実施例1と同様にして、遊離酸の形が一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例41のアゾ化合物の合成]
3次カップラーとして2-メトキシ-5-メチルアニリンに代えて2,5-ジメトキシアニリンを使用したこと以外は、実施例1における化合物例38のアゾ化合物の合成と同様にして、遊離酸の形が一般式(1-2)で表されるアゾ化合物として、化合物例41のアゾ化合物を合成した。
[偏光素子及び偏光板の作製]
遊離酸の形が一般式(1-2)で表されるアゾ化合物として、化合物例38のアゾ化合物に代えて化合物例41のアゾ化合物を使用したこと以外は、実施例1と同様にして、遊離酸の形が一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(10)で表されるアゾ化合物として、化合物例65(n=2)のアゾ化合物に代えてC.I.ダイレクト・オレンジ39(CAS番号:1325-54-8)を使用したこと以外は、実施例3と同様にして、遊離酸の形が一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(1-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて化合物例22のアゾ化合物のナトリウム塩(特許第4662853号公報の実施例2で合成されている式(10)のアゾ化合物)を使用したこと以外は、実施例3と同様にして、遊離酸の形が一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例34のアゾ化合物の合成]
まず、実施例1における化合物例38のアゾ化合物の合成と同様にして、前記構造式(16)で表されるジスアゾアミノ化合物31.3重量部を得た。
遊離酸の形が一般式(1-1)で表されるアゾ化合物としての化合物例34のアゾ化合物1.5重量部と、遊離酸の形が一般式(1-2)で表されるアゾ化合物としての実施例3で合成した化合物例41のアゾ化合物1.5重量部と、遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物(国際公開第2007/138980号の実施例1に記載の式(2)のアゾ化合物)0.3重量部と、トリポリ燐酸ナトリウム0.1重量部と、無水スルホン酸ナトリウム0.1重量部と、水2000重量部とを混合して、40℃の水溶液を調製した。この40℃の水溶液を、実施例1で使用した40℃の水溶液に代えて使用したこと以外は、実施例1と同様にして、遊離酸の形が一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例61のアゾ化合物の合成]
出発原料として、4-アミノベンゼン-1,3-ジスルホン酸25.3重量部に代えて7-アミノナフタレン-1,3,6-トリスルホン酸38.3重量部を使用したこと以外は、実施例3における化合物例41のアゾ化合物の合成と同様にして、遊離酸の形が一般式(1-2)で表されるアゾ化合物として、化合物例61のアゾ化合物を合成した。
[偏光素子及び偏光板の作製]
遊離酸の形が一般式(1-2)で表されるアゾ化合物として、化合物例38のアゾ化合物に代えて化合物例61のアゾ化合物を使用したこと以外は、実施例1と同様にして、遊離酸の形が一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例62のアゾ化合物の合成]
4次カップラーとして6-フェニルアミノ-1-ナフトール-3-スルホン酸16.1重量部に代えて6-(4’-メトキシフェニルアミノ)-1-ナフトール-3-スルホン酸17.7重量部を使用したこと以外は、実施例3における化合物例41のアゾ化合物の合成と同様にして、遊離酸の形が一般式(1-2)で表されるアゾ化合物として、化合物例62のアゾ化合物を合成した。
[偏光素子及び偏光板の作製]
遊離酸の形が一般式(1-2)で表されるアゾ化合物として、化合物例38のアゾ化合物に代えて化合物例62のアゾ化合物を使用したこと以外は、実施例1と同様にして、遊離酸の形が一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例7の染色工程(アゾ化合物をフィルムに吸着させる工程)の後に、以下のヨウ素、ヨウ化物処理、延伸処理、及びヨウ化物処理を行って偏光素子を作製したこと以外は実施例7と同様にして、遊離酸の形が一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物に代えて、非特許文献2に記載されているC.I.ダイレクト・イエロー28を使用したこと以外は、実施例3と同様にして、遊離酸の形が一般式(1-1)及び(1-2)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(1-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて、化合物例35のアゾ化合物(特開2003-215338号公報の合成例1で合成されている化合物No.1のジスアゾ化合物)を使用したこと以外は、実施例3と同様にして、遊離酸の形が一般式(1-1)、(1-2)、及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(1-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて、特許第2622748号公報の実施例1で合成されている下記構造式(20)(特許第2622748号公報の式(2))
実施例1におけるアゾ化合物の組成を特開平11-218611号公報の実施例2に記載のアゾ化合物の組成に変更したこと以外は、実施例1と同様にして偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例1におけるアゾ化合物の組成を特許第4162334号公報の実施例3に記載のアゾ化合物の組成に変更したこと以外は、実施例1と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(1-1)で表されるアゾ化合物としてのC.I.ダイレクト・レッド117に代えて、偏光素子において同じ青色を示すアゾ化合物である特公昭64-5623号公報の実施例1に記載の染料(アゾ化合物)を使用したこと以外、実施例3と同様にして、遊離酸の形が一般式(1-2)及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(1-2)で表されるアゾ化合物としての化合物例30のアゾ化合物に代えて、遊離酸の形が一般式(1-1)で表されるアゾ化合物である、特許第2622748号公報の実施例1で合成されている前記構造式(20)のトリスアゾ染料を使用したこと以外は、実施例3と同様にして、遊離酸の形が一般式(1-1)及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(1-2)で表されるアゾ化合物である化合物例38のアゾ化合物を、遊離酸の形が一般式(1-1)で表されるアゾ化合物である、国際公開第2012/108169号の実施例1に記載の式(17)で表されるテトラキスアゾ化合物を使用したこと以外は、実施例3と同様にして、遊離酸の形が一般式(1-1)及び(10)でそれぞれ表されるアゾ化合物を含む、ポリビニルアルコールフィルムを用いた単体透過率が約41%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
単体透過率が約40.5%の偏光素子が得られるように染色工程の時間を調整したこと以外は、特開2006-276236号公報の比較例3と同様にして、偏光素子を作製した。実施例1で得られた偏光素子に代えて本比較例で得られた偏光素子を用いたこと以外は、実施例1と同様にして偏光板を作製し、測定試料とした。
〔実施例13〕
遊離酸の形が一般式(2-1)で表されるアゾ化合物として化合物例2のアゾ化合物であるC.I.ダイレクト・レッド117を0.85重量部と、遊離酸の形が一般式(2-2)で表されるアゾ化合物としての化合物例120のアゾ化合物(特許第2622748号公報の実施例1に記載の式(2)で表されるトリスアゾ染料)0.55重量部と、遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体としての化合物例138のアゾ化合物(特公平2-61988号公報の実施例3に記載の銅錯塩化合物)2.0重量部と、遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物(国際公開第2007/138980号の実施例1に記載の式(2)で示されるアゾ化合物)0.45重量部と、トリポリ燐酸ナトリウム1.0重量部と、無水硫酸ナトリウム1.0重量部と、水2000重量部とを混合して、40℃の水溶液を調製した。
遊離酸の形が一般式(2-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて化合物例21のアゾ化合物(国際公開第2005/075572号の実施例1に記載の式(2)で示されるトリスアゾ化合物)を使用したこと以外は、実施例13と同様にして、遊離酸の形が一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例34の合成]
実施例6における化合物例34のアゾ化合物の合成と同様にして、遊離酸の形が一般式(2-1)で表されるアゾ化合物として、化合物例34のテトラキスアゾ化合物25.4重量部を得た。
遊離酸の形が一般式(2-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて化合物例34のテトラキスアゾ化合物を使用したこと以外は、実施例13と同様にして、遊離酸の形が一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(2-2)で表されるアゾ化合物として、化合物例120のアゾ化合物に代えて、化合物例70のアゾ化合物(国際公開第2007/148757号の実施例17で使用されている式(11)のアゾ化合物の塩)を使用したこと以外は、実施例15と同様にして、遊離酸の形が一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(2-2)で表されるアゾ化合物として、化合物例120のアゾ化合物に代えて、化合物例111のアゾ化合物(国際公開第2012/108169号の実施例19で使用されている式(17)の化合物)を使用したこと以外は、実施例13と同様にして、遊離酸の形が一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(2-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて、化合物例21のアゾ化合物(国際公開第2005/075572号の実施例1に記載の式(2)で示されるトリスアゾ化合物)を使用したこと以外は、実施例17と同様にして、遊離酸の形が一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(2-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて、実施例15で合成した化合物例34のアゾ化合物を使用したこと以外は、実施例17と同様にして、遊離酸の形が一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(2-2)で表されるアゾ化合物として、化合物例120のアゾ化合物に代えて、化合物例94のアゾ化合物(国際公開第2012/108173号の実施例40で使用されている式(27)のアゾ化合物)を使用したこと以外は、実施例15と同様にして、遊離酸の形が一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
一般式(10)で表されるアゾ化合物である化合物例65(n=2)のアゾ化合物に代えて、同様に一般式(10)で表されるアゾ化合物であるC.I.ダイレクト・オレンジ39(CAS番号:1325-54-8)を使用したこと以外は、実施例19と同様にして、遊離酸の形が一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物に代えて、他の有機染料としての非特許文献2に記載されているC.I.ダイレクト・イエロー28を使用したこと以外は、実施例19と同様にして、遊離酸の形が一般式(2-1)及び(2-2)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例13の染色工程(アゾ化合物をフィルムに吸着させる工程)の後に、以下のヨウ素、ヨウ化物処理、延伸処理、及びヨウ化物処理を行って偏光素子を作製したこと以外は実施例13と同様にして、遊離酸の形が一般式(2-1)、(2-2)、及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(2-3)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例13におけるアゾ化合物の組成を特開平11-218611号公報の実施例2に記載のアゾ化合物の組成に変更したこと以外は、実施例13と同様にして偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例13におけるアゾ化合物の組成を特許第4162334号公報の実施例3に記載のアゾ化合物の組成に変更したこと以外は、実施例13と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(2-1)で表されるアゾ化合物としてのC.I.ダイレクト・レッド117に代えて、特開2003-215338号公報に記載の代表例No.1の水溶性染料(アゾ化合物)を使用したこと以外は、実施例13と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(2-1)で表されるアゾ化合物としてのC.I.ダイレクト・レッド117に代えて、特開平1-172907号公報の実施例1に記載の染料(アゾ化合物)を使用したこと以外は、実施例13と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(2-2)で表されるアゾ化合物としての化合物例120のアゾ化合物に代えて、偏光度が最も高い波長が同等である特公昭64-5623号公報の実施例1に記載の銅化染料(トリスアゾ化合物)を使用したこと以外は、実施例13と同様にして、単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例13におけるアゾ化合物の組成を特許第4360100号公報の実施例1に記載のアゾ化合物の組成に変更したこと以外は実施例13と同様にして偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
単体透過率が約41%の偏光素子が得られるように染色工程の時間を調整したこと以外は、特開2006-276236号公報の比較例3と同様にして、偏光素子を作製した。実施例13で得られた偏光素子に代えて本比較例で得られた偏光素子を用いたこと以外は、実施例13と同様にして偏光板を作製し、測定試料とした。
〔実施例24〕
[化合物例143のアゾ化合物の合成]
4-アミノベンゼン-1-スルホン酸25.3重量部を水500重量部に加え、冷却し10℃以下で、35重量%塩酸水溶液31.3重量部を加え、次に亜硝酸ナトリウム6.9重量部を加え、5~10℃で1時間攪拌し、ジアゾ化した。そこへ、1次カップラーとして希塩酸水溶液に溶解した2,5-ジメトキシアニリン10.7重量部を加え、10~30℃で攪拌しながら、炭酸ナトリウムを加えてpH3とし、さらに攪拌してカップリング反応を完結させ、濾過し、下記構造式(28)
遊離酸の形が一般式(3-1)で表されるアゾ化合物又はその銅化物としての化合物例143のアゾ化合物1.3重量部と、遊離酸の形が一般式(3-3)で表されるアゾ化合物としてのC.I.ダイレクト・レッド81(化合物例1のアゾ化合物)0.64重量部と、遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物(国際公開第2007/138980号の実施例1に記載されているアゾ化合物)0.42重量部と、トリポリ燐酸ナトリウム2.0重量部と、無水硫酸ナトリウム2.0重量部と、水2000重量部とを混合して、40℃の水溶液を調製した。
遊離酸の形が一般式(3-3)で表されるアゾ化合物として、実施例24で用いたC.I.ダイレクト・レッド81(化合物例1のアゾ化合物)0.64重量部に代えて、C.I.ダイレクト・レッド117(化合物例2のアゾ化合物)0.50重量部を使用したこと以外は、実施例24と同様にして、偏光素子を作製し、本発明の第3の実施形態に係る偏光板とした。
遊離酸の形が一般式(3-3)で表されるアゾ化合物として、実施例24で用いたC.I.ダイレクト・レッド81(化合物例1のアゾ化合物)0.64重量部に代えて、化合物例22のアゾ化合物(特許第4662853号公報の実施例2に記載されているアゾ化合物)0.88重量部を使用したこと以外は、実施例24と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
[化合物例34のアゾ化合物の合成]
6-(4’-アミノベンゾイルアミノ)-1-ナフトール-3-スルホン酸の使用量を18.3重量部から16.1重量部に変更したこと以外は、実施例6における化合物例34の合成と同様にして、遊離酸の形が一般式(3-3)で表されるアゾ化合物としての、化合物例34のテトラキスアゾ化合物24.7重量部を得た。
遊離酸の形が一般式(3-3)で表されるアゾ化合物として、実施例24で用いたC.I.ダイレクト・レッド81(化合物例1のアゾ化合物)0.64重量部に代えて、合成によって得られた化合物例34のアゾ化合物1.3重量部を使用したこと以外は、実施例24と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(10)で表されるアゾ化合物として、化合物例65(n=2)のアゾ化合物に代えてC.I.ダイレクト・オレンジ39(CAS番号:1325-54-8)を使用したこと以外は、実施例27と同様にして、遊離酸の形が一般式(3-1)で表されるアゾ化合物又はその銅化物と遊離酸の形が一般式(3-3)及び(10)でそれぞれ表されるアゾ化合物とを含む、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物に代えて、他の有機染料としての次の構造式
実施例27の染色工程(アゾ化合物をフィルムに吸着させる工程)の後に、以下のヨウ素、ヨウ化物処理、延伸処理、及びヨウ化物処理を行って偏光素子を作製したこと以外は実施例27と同様にして、遊離酸の形が一般式(3-1)で表されるアゾ化合物又はその銅化物と遊離酸の形が一般式(3-3)及び(10)でそれぞれ表されるアゾ化合物とを含む、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(3-1)で表されるアゾ化合物又はその銅化物として、実施例26で用いた化合物例143のアゾ化合物1.3重量部に代えて、化合物例151のアゾ化合物1.43重量部を使用したこと以外は、実施例26と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(3-3)で表されるアゾ化合物として用いたC.I.ダイレクト・レッド81(化合物例1のアゾ化合物)0.64重量部に代えて、下記構造式
遊離酸の形が一般式(3-3)で表されるアゾ化合物として用いたC.I.ダイレクト・レッド81(化合物例1のアゾ化合物)0.64重量部に代えて、下記構造式
実施例24におけるアゾ化合物の組成を特開平11-218611号公報の実施例2に記載のアゾ化合物の組成に変更したこと以外は、実施例24と同様にして偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例24におけるアゾ化合物の組成を特許第4162334号公報の実施例3に記載のアゾ化合物の組成に変更したこと以外は、実施例24と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(3-3)で表されるアゾ化合物としてのC.I.ダイレクト・レッド81に代えて、特開2003-215338号公報の合成例1に記載されている化合物No.1のジスアゾ化合物を使用し、かつ、遊離酸の形が一般式(3-1)で表されるアゾ化合物又はその銅化物としての化合物例143のアゾ化合物1.3重量部に代えて、下記構造式(30)
遊離酸の形が一般式(3-3)で表されるアゾ化合物としてのC.I.ダイレクト・レッド81に代えて、特開平1-172907号公報の実施例1に記載されているアゾ化合物を使用し、かつ、遊離酸の形が一般式(3-1)で表されるアゾ化合物又はその銅化物としての化合物例143のアゾ化合物1.3重量部に代えて前記構造式(30)で表されるアゾ化合物0.95重量部を使用したこと以外は、実施例24と同様にして、単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(3-3)で表されるアゾ化合物としてのC.I.ダイレクト・レッド81に代えて、特許第2622748号公報の実施例1に記載されている式(2)のトリスアゾ染料を使用し、かつ、遊離酸の形が一般式(3-1)で表されるアゾ化合物又はその銅化物としての化合物例143のアゾ化合物1.3重量部に代えて前記構造式(30)で表されるアゾ化合物0.88重量部を使用したこと以外は、実施例24と同様にして、単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(3-1)で表されるアゾ化合物又はその銅化物としての化合物例143のアゾ化合物に代えて、特許第2622748号公報の実施例1に記載されている式(2)のトリスアゾ染料を使用したこと以外は、実施例24と同様にして、単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例24におけるアゾ化合物の組成を特許第4360100号公報の実施例1に記載のアゾ化合物の組成に変更したこと以外は、実施例24と同様にして偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
単体透過率が約40.5%の偏光素子が得られるように染色工程の時間を調整したこと以外は、特開2006-276236公報の比較例3と同様にして、偏光素子を作製した。実施例24で得られた偏光素子に代えて本比較例で得られた偏光素子を用いたこと以外は、実施例24と同様にして偏光板を作製し、測定試料とした。
〔実施例34〕
[化合物例34のアゾ化合物の合成]
実施例6における化合物例34のアゾ化合物の合成と同様にして、一般式(2-1)で表されるアゾ化合物又はその塩として、化合物例34のアゾ化合物(テトラキスアゾ化合物)25.4重量部を得た。
4-アミノベンゼン-1-スルホン酸25.3重量部を水500重量部に加え、冷却し10℃以下で、35重量%塩酸水溶液31.3重量部を加え、次に亜硝酸ナトリウム6.9重量部を加え、5~10℃で1時間攪拌し、ジアゾ化した。そこへ、希塩酸水溶液に溶解した2-メトキシアニリン10.7重量部を加え、10~30℃で攪拌しながら、炭酸ナトリウムを加えてpH3とし、さらに攪拌してカップリング反応を完結させ、濾過し、下記構造式(31)
一般式(2-1)で表されるアゾ化合物又はその塩としての化合物例34のアゾ化合物1.5重量部と、一般式(4-2)で表されるアゾ化合物又はその塩としての化合物例156のアゾ化合物0.65重量部と、一般式(10)で表されるアゾ化合物又はその塩としての化合物例65(n=2)のアゾ化合物(国際公開第2007/138980号の実施例1に記載されているアゾ化合物)0.2重量部と、トリポリ燐酸ナトリウム1.0重量部と、無水硫酸ナトリウム1.0重量部と、水2000重量部とを混合して、40℃の水溶液を調製した。
[化合物例159のアゾ化合物の合成]
6-(4’-アミノベンゾイルアミノ)-1-ナフトール-3-スルホン酸に代えて6-フェニルアミノ-1-ナフトール-3-スルホン酸を用いたこと以外は、実施例34における化合物例156のアゾ化合物の合成と同様にして、一般式(4-2)で表されるアゾ化合物又はその塩として、化合物例159のアゾ化合物を合成した。
一般式(4-2)で表されるアゾ化合物又はその塩として、化合物例156のアゾ化合物に代えて化合物例159のアゾ化合物を用いたこと以外は実施例34と同様にして、一般式(2-1)、一般式(4-2)、及び一般式(10)のそれぞれで表されるアゾ化合物又はその塩を含有する、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例158のアゾ化合物の合成]
6-(4’-アミノベンゾイルアミノ)-1-ナフトール-3-スルホン酸に代えて6-(4’-ヒドロキシフェニルアゾ)-1-ナフトール-3-スルホン酸を用いたこと以外は、実施例34における化合物例156のアゾ化合物の合成と同様にして、一般式(4-2)で表されるアゾ化合物又はその塩として、化合物例158のアゾ化合物を合成した。
一般式(4-2)で表されるアゾ化合物又はその塩として、化合物例156のアゾ化合物に代えて化合物例158のアゾ化合物を用い、一般式(10)で表されるアゾ化合物又はその塩として、化合物例65(n=2)のアゾ化合物に代えて化合物例64のアゾ化合物を用いたこと以外は実施例34と同様にして、一般式(2-1)、一般式(4-2)、及び一般式(10)のそれぞれで表されるアゾ化合物又はその塩を含有する、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例161のアゾ化合物の合成]
2-メトキシアニリンに代えて2,5-ジメトキシアニリンを用いたこと以外は、実施例35における化合物例159のアゾ化合物の合成と同様にして、一般式(4-2)で表されるアゾ化合物又はその塩として、化合物例161のアゾ化合物を合成した。
一般式(4-2)で表されるアゾ化合物又はその塩として、化合物例156のアゾ化合物に代えて化合物例161のアゾ化合物を用いたこと以外は実施例34と同様にして、一般式(2-1)、一般式(4-2)、及び一般式(10)のそれぞれで表されるアゾ化合物又はその塩を含有する、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例166のアゾ化合物の合成]
4-アミノベンゼン-1-スルホン酸に代えて7-アミノナフタレン-1,3-ジスルホン酸を用いたこと以外は、実施例37における化合物例161のアゾ化合物の合成と同様にして、一般式(4-2)で表されるアゾ化合物又はその塩として、化合物例166のアゾ化合物を合成した。
一般式(4-2)で表されるアゾ化合物又はその塩として、化合物例156のアゾ化合物に代えて化合物例166のアゾ化合物を用いたこと以外は実施例34と同様にして、一般式(2-1)、一般式(4-2)、及び一般式(10)のそれぞれで表されるアゾ化合物又はその塩を含有する、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
一般式(2-1)で表されるアゾ化合物又はその塩として、化合物例34のアゾ化合物に代えて、化合物例22のアゾ化合物のナトリウム塩(特許第4662853号公報の実施例2に記載のアゾ化合物)を用いたこと以外は、実施例37と同様にして、一般式(2-1)、一般式(4-2)、及び一般式(10)のそれぞれで表されるアゾ化合物又はその塩を含有する、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
一般式(2-1)で表されるアゾ化合物又はその塩として、化合物例34のアゾ化合物に代えて、下記構造式
一般式(2-1)で表されるアゾ化合物又はその塩として、化合物例34のアゾ化合物に代えて、下記構造式
一般式(10)で表されるアゾ化合物又はその塩としての化合物例65(n=2)のアゾ化合物に代えて、他の有機染料としての下記構造式
実施例34におけるアゾ化合物の組成を特開平11-218611号公報の実施例2に記載のアゾ化合物の組成に変更したこと以外は実施例34と同様にして、偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例34におけるアゾ化合物の組成を特許第4162334号公報の実施例3に記載のアゾ化合物の組成に変更したこと以外は実施例34と同様にして、偏光素子を作製すると共に偏光板を作製し、測定試料とした。
一般式(2-1)で表されるアゾ化合物又はその塩としての化合物例34のアゾ化合物に代えて、特開2003-215338号公報の合成例1に記載されている化合物No.1のジスアゾ化合物を用いたこと以外は、実施例34と同様にして、一般式(4-2)及び一般式(10)のそれぞれで表されるアゾ化合物又はその塩と他の有機染料とを含有する、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
一般式(2-1)で表されるアゾ化合物又はその塩としての化合物例34のアゾ化合物に代えて、特開平1-172907号公報の実施例1に記載されているアゾ化合物を用いたこと以外は、実施例34と同様にして、一般式(4-2)及び一般式(10)のそれぞれで表されるアゾ化合物又はその塩と他の有機染料とを含有する、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
一般式(2-1)で表されるアゾ化合物又はその塩としての化合物例34のアゾ化合物に代えて、特許第2622748号公報の実施例1に記載されている式(2)のトリスアゾ染料を用いたこと以外は、実施例34と同様にして、一般式(4-2)及び一般式(10)のそれぞれで表されるアゾ化合物又はその塩と他の有機染料とを含有する、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
一般式(4-2)で表されるアゾ化合物又はその塩としての化合物例156のアゾ化合物に代えて、特許第2622748号公報の実施例1に記載されている式(2)のトリスアゾ染料を用いたこと以外は、実施例36と同様にして、一般式(2-1)及び一般式(10)のそれぞれで表されるアゾ化合物又はその塩と他の有機染料とを含有する、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例34におけるアゾ化合物の組成を特許第4360100号公報の実施例1に記載のアゾ化合物の組成に変更したこと以外は実施例34と同様にして、偏光素子を作製すると共に偏光板を作製し、測定試料とした。
単体透過率が約40.5%の偏光素子が得られるように染色工程の時間を調整したこと以外は、特開2006-276236公報の比較例3と同様にして、偏光素子を作製した。実施例34で得られた偏光素子に代えて本比較例で得られた偏光素子を用いたこと以外は、実施例34と同様にして偏光板を作製し、測定試料とした。
〔実施例43〕
[偏光素子及び偏光板の作製]
遊離酸の形が一般式(5-1)で表されるアゾ化合物としての化合物例22のアゾ化合物のナトリウム塩(特許第4662853号公報の実施例2で合成されている式(4)のアゾ化合物)1.85重量部と、遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体としての化合物例174のアゾ化合物のナトリウム塩(特開平10-259311号公報の実施例5に記載の式(9)のアゾ化合物)1.0重量部と、遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物(国際公開第2007/138980号の実施例1に記載の式(2)のアゾ化合物)0.70重量部と、トリポリ燐酸ナトリウム1.0重量部と、無水硫酸ナトリウム1.0重量部と、水2000重量部とを混合して、40℃の水溶液を調製した。
遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体として、化合物例174のアゾ化合物のナトリウム塩に代えて化合物例194のアゾ化合物のナトリウム塩(特開平10-259311公報の実施例6に記載の式(10)のアゾ化合物)を使用したこと以外は、実施例43と同様にして、遊離酸の形が一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体として、化合物例174のアゾ化合物のナトリウム塩に代えて化合物例182のアゾ化合物のナトリウム塩(特許第3661238号公報の実施例3に記載のテトラキスアゾ化合物)を使用したこと以外は、実施例43と同様にして、遊離酸の形が一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(5-1)で表されるアゾ化合物として、化合物例22のアゾ化合物のナトリウム塩に代えて、下記構造式
遊離酸の形が一般式(5-1)で表されるアゾ化合物として、化合物例22のアゾ化合物のナトリウム塩に代えて化合物例20のアゾ化合物(特許第4662853号公報に記載の式(3)で表されるアゾ化合物)を使用したこと以外は、実施例45と同様にして、遊離酸の形が一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例46において調製された3種類のアゾ化合物を含む40℃の水溶液に、さらに国際公開第2012/108169号の実施例1に記載の式(17)で表されるテトラキスアゾ化合物0.4重量部を加えた以外は、実施例46と同様にして、遊離酸の形が一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例34のアゾ化合物の合成]
実施例6における化合物例34のアゾ化合物の合成と同様にして、遊離酸の形が一般式(5-1)で表されるアゾ化合物として、化合物例34のテトラキスアゾ化合物25.4重量部を得た。
遊離酸の形が一般式(5-1)で表されるアゾ化合物として、化合物例22のアゾ化合物のナトリウム塩に代えて化合物例34のテトラキスアゾ化合物を使用し、かつ、遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体として、化合物例174のアゾ化合物のナトリウム塩に代えて化合物例195のアゾ化合物(特許第3661238号の表1に記載の番号4のテトラキスアゾ化合物4)を使用したこと以外は、実施例43と同様にして、遊離酸の形が一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体として、化合物例195のアゾ化合物に代えて、化合物例194のアゾ化合物のナトリウム塩(特開平10-259311公報の実施例6に記載の式(10)のアゾ化合物)を使用したこと以外は、実施例49と同様にして、遊離酸の形が一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(10)で表されるアゾ化合物として、化合物例65(n=2)のアゾ化合物に代えてC.I.ダイレクト・オレンジ39(CAS番号:1325-54-8)を使用したこと以外は、実施例50と同様にして、遊離酸の形が一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体として、化合物例194のアゾ化合物のナトリウム塩に代えて化合物例196のアゾ化合物(国際公開第2012/108169号に記載の式(50)のアゾ化合物)を使用したこと以外は、実施例51と同様にして、遊離酸の形が一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物に代えて、非特許文献2に記載のC.I.ダイレクト・イエロー28を使用したこと以外は、実施例50と同様にして、遊離酸の形が一般式(5-1)で表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例46の染色工程(アゾ化合物をフィルムに吸着させる工程)の後に、以下のヨウ素、ヨウ化物処理、延伸処理、及びヨウ化物処理を行って偏光素子を作製したこと以外は実施例46と同様にして、遊離酸の形が一般式(5-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(5-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた単体透過率が約40%の偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例43におけるアゾ化合物の組成を特開平11-218611号公報の実施例2に記載のアゾ化合物の組成に変更したこと以外は、実施例43と同様にして偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例43におけるアゾ化合物の組成を特許第4162334号公報の実施例3に記載のアゾ化合物の組成に変更したこと以外は、実施例43と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(5-1)で表されるアゾ化合物としての化合物例22のアゾ化合物のナトリウム塩に代えて、特開2003-215338号公報の合成例1で合成されている化合物No.1のジスアゾ化合物を使用したこと以外は、実施例43と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(5-1)で表されるアゾ化合物としてのC.I.ダイレクト・レッド117に代えて、特開平1-172907号の実施例1に記載されているアゾ化合物を使用したこと以外は、実施例46と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(5-2)で表されるアゾ化合物としての化合物例174のアゾ化合物のナトリウム塩に代えて、偏光素子において同じ青色を示すアゾ化合物である特公昭64-5623号公報の実施例1に記載の染料(アゾ化合物)を使用したこと以外は、実施例43と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例43におけるアゾ化合物の組成を特許第4360100号公報の実施例1に記載のアゾ化合物の組成に変更したこと以外は、実施例43と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(5-2)で表されるアゾ化合物としての化合物例174のアゾ化合物に代えて、偏光素子において同じ青色を示すアゾ化合物である国際公開第2009/154055号にアゾ化合物の具体例(13)として記載の染料(アゾ化合物)を使用したこと以外は、実施例43と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
単体透過率が約41%の偏光素子が得られるように染色工程の時間を調整したこと以外は、特開2006-276236号公報の比較例3と同様にして、偏光素子を作製した。実施例43で得られた偏光素子に代えて本比較例で得られた偏光素子を用いたこと以外は、実施例43と同様にして偏光板を作製し、測定試料とした。
〔実施例55〕
遊離酸の形が一般式(6-1)で表されるアゾ化合物としての化合物例2のアゾ化合物であるC.I.ダイレクト・レッド117を0.90重量部と、遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体としての化合物例217のアゾ化合物(国際公開第2007/145210号の実施例7に記載の式(10)で表されるアゾ化合物)1.5重量部と、遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物(国際公開第2007/138980号の実施例1に記載の式(2)で示されるアゾ化合物)0.98重量部と、遊離酸の形が一般式(6-5)で表されるアゾ化合物としての化合物例111のアゾ化合物(国際公開第2012/108169号の実施例1で合成されている式(17)の化合物)1.2重量部と、トリポリ燐酸ナトリウム1.0重量部と、無水硫酸ナトリウム1.0重量部と、水2000重量部とを混合して、40℃の水溶液を調製した。
遊離酸の形が一般式(6-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて、化合物例21のアゾ化合物(国際公開第2005/075572号の実施例1に記載の式(2)で示されるトリスアゾ化合物)を使用したこと以外は、実施例55と同様にして、遊離酸の形が一般式(6-1)、(10)、及び(6-5)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
[化合物例34の合成]
実施例6における化合物例34のアゾ化合物の合成と同様にして、化合物例34のテトラキスアゾ化合物25.4重量部を得た。
遊離酸の形が一般式(6-5)で表されるアゾ化合物としての化合物例111のアゾ化合物を使用せず、かつ、遊離酸の形が一般式(6-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えてテトラキスアゾ化合物である化合物例34のアゾ化合物を使用したこと以外は、実施例55と同様にして、遊離酸の形が一般式(6-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体として化合物例217のアゾ化合物1.5重量部に代えて化合物例218のアゾ化合物(国際公開第2007/145210号の実施例9に記載の式(12)で表されるアゾ化合物)1.5重量部を使用し、遊離酸の形が一般式(6-5)で表されるアゾ化合物として化合物例111のアゾ化合物1.2重量部に代えて化合物例120のアゾ化合物(特開平3-12606号公報の実施例1に記載の式(2)で表されるトリスアゾ染料)1.2重量部を使用し、遊離酸の形が一般式(6-1)で表されるアゾ化合物としてのC.I.ダイレクト・レッド117の使用量を0.90重量部から1.1重量部に変更し、遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物の使用量を0.98重量部から1.1重量部に変更したこと以外は、実施例55と同様にして、遊離酸の形が一般式(6-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(6-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて、化合物例21のアゾ化合物(国際公開第2005/075572号の実施例1に記載の式(2)で示されるトリスアゾ化合物)を使用したこと以外は、実施例57と同様にして、遊離酸の形が一般式(6-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(6-5)で表されるアゾ化合物として、化合物例120のアゾ化合物に代えて、化合物例111のアゾ化合物(国際公開第2012/108169号の実施例1で合成されている式(17)の化合物)を使用したこと以外は、実施例58と同様にして、遊離酸の形が一般式(6-1)、(10)、及び(6-5)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(6-1)で表されるアゾ化合物として、C.I.ダイレクト・レッド117に代えて、化合物例21のアゾ化合物(国際公開第2005/075572号の実施例1に記載の式(2)で示されるトリスアゾ化合物)を使用したこと以外は、実施例60と同様にして、遊離酸の形が一般式(6-1)、(10)、及び(6-5)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(6-5)で表されるアゾ化合物としての化合物例111のアゾ化合物を使用せず、かつ、遊離酸の形が一般式(6-1)で表されるアゾ化合物としてC.I.ダイレクト・レッド117に代えてテトラキスアゾ化合物である化合物例34のアゾ化合物を使用したこと以外は、実施例60と同様にして、遊離酸の形が一般式(6-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(10)で表されるアゾ化合物として、化合物例65(n=2)のアゾ化合物に代えてC.I.ダイレクト・オレンジ39(CAS番号:1325-54-8)を使用したこと以外は、実施例62と同様にして、遊離酸の形が一般式(6-1)及び(10)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
遊離酸の形が一般式(10)で表されるアゾ化合物としての化合物例65(n=2)のアゾ化合物に代えて、非特許文献2に記載されているC.I.ダイレクト・イエロー28を使用したこと以外は、実施例62と同様にして、遊離酸の形が一般式(6-1)で表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例58の染色工程(アゾ化合物をフィルムに吸着させる工程)の後に、以下のヨウ素、ヨウ化物処理、延伸処理、及びヨウ化物処理を行って偏光素子を作製したこと以外は実施例58と同様にして、遊離酸の形が一般式(6-1)、(10)、及び(6-5)でそれぞれ表されるアゾ化合物と遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体とを含む、ポリビニルアルコールフィルムを用いた偏光素子を作製すると共に偏光板を作製し、測定試料とした。
実施例55におけるアゾ化合物の組成を特開平11-218611号公報の実施例2に記載のアゾ化合物の組成に変更したこと以外は、実施例55と同様にして偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例55におけるアゾ化合物の組成を特許第4162334号公報の実施例3に記載のアゾ化合物の組成に変更したこと以外は、実施例55と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(6-1)で表されるアゾ化合物としてのC.I.ダイレクト・レッド117に代えて、特開2003-215338号公報に記載の代表例No.1の水溶性染料(アゾ化合物)を使用し、かつ、遊離酸の形が一般式(6-5)で表されるアゾ化合物として化合物例111のアゾ化合物に代えて化合物例120のアゾ化合物(特開平3-12606号公報の実施例1に記載の式(2)で表されるトリスアゾ染料)を使用したこと以外は、実施例55と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
遊離酸の形が一般式(6-1)で表されるアゾ化合物としてのC.I.ダイレクト・レッド117に代えて、特開平1-172907号公報の実施例1に記載の染料(アゾ化合物)を使用したこと以外は、実施例58と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例55において、遊離酸の形が一般式(6-2)で表されるアゾ化合物又はその金属錯体としての化合物例120のアゾ化合物に代えて、偏光度が最も高い波長が同等である特公昭64-5623号公報の実施例1に記載の染料(トリスアゾ化合物)を使用したこと以外は、実施例55と同様にして、偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
実施例55におけるアゾ化合物の組成を特許第4360100号公報の実施例1に記載のアゾ化合物の組成に変更したこと以外は、実施例55と同様にして偏光素子を作製すると共に偏光板を作製し、作製した偏光板を測定試料とした。
単体透過率が約41%の偏光素子が得られるように染色工程の時間を調整したこと以外は、特開2006-276236号公報の比較例3と同様にして、偏光素子を作製した。実施例55で得られた偏光素子に代えて本比較例で得られた偏光素子を用いたこと以外は、実施例55と同様にして偏光板を作製し、測定試料とした。
Claims (35)
- 基材と、遊離酸の形が下記一般式(1)
で表されるアゾ化合物並びにその銅化物及び金属錯体(銅化物を除く)とを含み、
R5が炭素数1~4のアルコキシ基である場合の前記アゾ化合物の前記銅化物は、そのアルコキシ基中のアルキル基が銅原子に置き換えられ、前記一般式(1)中のナフタレン環上のヒドロキシ基中の酸素原子に前記銅原子が結合したものであってもよく、
下記i)~vi)のいずれかの要件を満たすことを特徴とする偏光素子。
i)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイルアミノ基、炭素数1~4のアルコキシ基、スルホ基、ヒドロキシ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基、又は炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいナフトトリアゾール基であり、m及びnが1の場合には、R5及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、又はスルホ基を有する炭素数1~4のアルコキシ基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R4及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R5がメトキシ基であるアゾ化合物とを含む。
ii)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが下記一般式(2)
で表される置換基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、少なくともnが1であり、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、ヒドロキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基、又は炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいナフトトリアゾール基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物又はその金属錯体であって、Aが下記一般式(3)
で表される置換基であり、Xが炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイル基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイルアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、ヒドロキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基、又は炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいナフトトリアゾール基であり、m及びnが0であるアゾ化合物とを含む。
iii)遊離酸の形が前記一般式(1)で表されるアゾ化合物又はその銅化物であって、mが0であり、R3~R6がメトキシ基であり、Xが下記一般式(4)
で表される置換基であるアゾ化合物を少なくとも一種含む。
iv)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが下記一般式(2)
で表される置換基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物の銅化物であって、遊離酸の形が下記一般式(5)
で表され、m及びnが0であり、R6が水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、Xが置換基を有していてもよいアミノ基、置換基を有していてもよいベンゾイル基、又は置換基を有していてもよいフェニルアゾ基であるアゾ化合物とを含む。
v)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R4がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R5及びR6がそれぞれ独立に、水素原子又は炭素数1~4のアルキル基であり、Xが下記一般式(6)
で表される置換基であるアゾ化合物と、
遊離酸の形が前記一般式(1)で表されるアゾ化合物又はその金属錯体であって、nが1であり、R1、R2、及びR4がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R3、R5、及びR6がメトキシ基であり、Xが、ヒドロキシ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイル基、ヒドロキシ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいベンゾイルアミノ基、又はヒドロキシ基、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアゾ基であるアゾ化合物とを含む。
vi)遊離酸の形が前記一般式(1)で表されるアゾ化合物であって、R1~R6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基を表し、Xが下記一般式(7)
で表される置換基であり、m及びnが1の場合には、R5及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、又はスルホ基を有する炭素数1~4のアルコキシ基であるアゾ化合物と、
遊離酸の形が下記一般式(8)
で表されるアゾ化合物又はその金属錯体であって、mが0であり、R3、R4、及びR6がそれぞれ独立に、水素原子、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、又はスルホ基を有する炭素数1~4のアルコキシ基であり、R5がメトキシ基であり、Xが下記一般式(9)
で表される置換基であるアゾ化合物とを含む。 - 請求項1に記載の偏光素子であって、
遊離酸の形が下記一般式(1-1)
で表されるアゾ化合物と、遊離酸の形が下記一般式(1-2)
で表されるアゾ化合物とを含むことを特徴とする偏光素子。 - 請求項2又は3に記載の偏光素子であって、
前記一般式(1-2)又は(1-3)中のRb15が、メトキシ基であることを特徴とする偏光素子。 - 請求項2~4のいずれか1項に記載の偏光素子であって、
前記一般式(1-2)又は(1-3)中のXb11が、置換基を有していてもよいフェニルアミノ基であることを特徴とする偏光素子。 - 請求項2~5のいずれか1項に記載の偏光素子であって、
前記一般式(1-1)中のXr11が、アミノ基及び置換アミノ基からなる群より選択される置換基を有してもよいベンゾイル基、又はアミノ基及び置換アミノ基からなる群より選択される置換基を有してもよいベンゾイルアミノ基であることを特徴とする偏光素子。 - 請求項1に記載の偏光素子であって、
遊離酸の形が下記一般式(2-1)
で表されるアゾ化合物と、遊離酸の形が下記一般式(2-2)
で表されるアゾ化合物と、遊離酸の形が下記一般式(2-3)
で表されるアゾ化合物又はその金属錯体とを含むことを特徴とする偏光素子。 - 請求項7~9のいずれか1項に記載の偏光素子であって、
前記一般式(2-3)又は(2-4)中のXg21が、炭素数1~4のアルキル基、炭素数1~4のアルコキシ基、スルホ基、アミノ基、及び置換アミノ基からなる群より選択される置換基を有していてもよいフェニルアミノ基であることを特徴とする偏光素子。 - 請求項7~10のいずれか1項に記載の偏光素子であって、
前記一般式(1)中のXr21が、アミノ基であることを特徴とする偏光素子。 - 請求項12又は13に記載の偏光素子であって、
遊離酸の形が一般式(3-1)又は(3-2)で表されるアゾ化合物又はその銅化物として、遊離酸の形が一般式(3-1)又は(3-2)で表され銅原子を含まないアゾ化合物を含むことを特徴とする偏光素子。 - 請求項15に記載の偏光素子であって、
前記一般式(3-3)中のXr31が、アミノ基であることを特徴とする偏光素子。 - 請求項1に記載の偏光素子であって、
下記一般式(2-1)
で表されるアゾ化合物又はその塩と、
下記一般式(4-2)
で表されるアゾ化合物又はその塩とを含むことを特徴とする偏光素子。 - 請求項17又は18に記載の偏光素子であって、
前記一般式(4-2)又は(4-3)中のRb41が、メトキシ基であることを特徴とする偏光素子。 - 請求項17~19のいずれか1項に記載の偏光素子であって、
前記一般式(4-2)又は(4-3)中のXb41が、置換基を有していてもよいフェニルアミノ基であることを特徴とする偏光素子。 - 請求項17~20のいずれか1項に記載の偏光素子であって、
前記一般式(4-1)中のXr41が、アミノ基であることを特徴とする偏光素子。 - 請求項1に記載の偏光素子であって、
遊離酸の形が下記一般式(5-1)
で表されるアゾ化合物と、遊離酸の形が下記一般式(5-2)
で表されるアゾ化合物又はその金属錯体とを含むことを特徴とする偏光素子。 - 請求項22又は23に記載の偏光素子であって、
前記一般式(5-1)中のXr51が、アミノ基であることを特徴とする偏光素子。 - 請求項1に記載の偏光素子であって、
遊離酸の形が下記一般式(6-1)
で表されるアゾ化合物と、遊離酸の形が下記一般式(6-2)
で表されるアゾ化合物又はその金属錯体とを含むことを特徴とする偏光素子。 - 請求項25又は26に記載の偏光素子であって、
遊離酸の形が下記一般式(6-5)
で表されるアゾ化合物をさらに含むことを特徴とする偏光素子。 - 請求項25~28のいずれか1項に記載の偏光素子であって、
前記一般式(6-1)中のXr61が、アミノ基であることを特徴とする偏光素子。 - 請求項30に記載の偏光素子であって、
前記一般式(10)中のAy1が、カルボキシ基又はスルホ基であることを特徴とする偏光素子。 - 請求項1~31のいずれか1項に記載の偏光素子であって、
ヨウ素をさらに含むことを特徴とする偏光素子。 - 請求項1~32のいずれか1項に記載の偏光素子であって、
前記基材がポリビニルアルコール系の樹脂からなるフィルムであることを特徴とする偏光素子。 - 請求項1~33のいずれか1項に記載の偏光素子と、
前記偏光素子の少なくとも片面に設けられた透明保護層とを備えることを特徴とする偏光板。 - 請求項1~33のいずれか1項に記載の偏光素子、又は請求項34に記載の偏光板を備えることを特徴とする表示装置。
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WO2020050190A1 (ja) * | 2018-09-07 | 2020-03-12 | 株式会社ポラテクノ | 偏光層を用いた表示装置 |
WO2022054786A1 (ja) * | 2020-09-08 | 2022-03-17 | 日本化薬株式会社 | アゾ化合物又はその塩を含有する偏光膜、偏光板並びに液晶表示装置 |
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JP7448477B2 (ja) | 2018-09-05 | 2024-03-12 | 日本化薬株式会社 | 偏光素子並びにそれを用いた偏光板及び光学部材等 |
WO2020050190A1 (ja) * | 2018-09-07 | 2020-03-12 | 株式会社ポラテクノ | 偏光層を用いた表示装置 |
JP2020042111A (ja) * | 2018-09-07 | 2020-03-19 | 株式会社ポラテクノ | 偏光層を用いた表示装置 |
CN112789552A (zh) * | 2018-09-07 | 2021-05-11 | 日本化药株式会社 | 使用偏振层的显示装置 |
JP7214412B2 (ja) | 2018-09-07 | 2023-01-30 | 日本化薬株式会社 | 偏光層を用いた表示装置 |
CN112789552B (zh) * | 2018-09-07 | 2024-05-28 | 日本化药株式会社 | 使用偏振层的显示装置 |
WO2022054786A1 (ja) * | 2020-09-08 | 2022-03-17 | 日本化薬株式会社 | アゾ化合物又はその塩を含有する偏光膜、偏光板並びに液晶表示装置 |
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KR20180107150A (ko) | 2018-10-01 |
JPWO2017135391A1 (ja) | 2018-11-29 |
CN108700692A (zh) | 2018-10-23 |
JP7246435B2 (ja) | 2023-03-27 |
JP2021103318A (ja) | 2021-07-15 |
JP7214789B2 (ja) | 2023-01-30 |
JP6898866B2 (ja) | 2021-07-07 |
JP2021152672A (ja) | 2021-09-30 |
TWI713689B (zh) | 2020-12-21 |
JP2021152673A (ja) | 2021-09-30 |
TW201734143A (zh) | 2017-10-01 |
CN108700692B (zh) | 2021-03-16 |
HK1251791A1 (zh) | 2019-03-15 |
JP2021002043A (ja) | 2021-01-07 |
JP7246434B2 (ja) | 2023-03-27 |
JP7246422B2 (ja) | 2023-03-27 |
JP2021152674A (ja) | 2021-09-30 |
JP7005711B2 (ja) | 2022-01-24 |
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