KR20190125990A - Optical stack - Google Patents

Abstract

This invention effectively suppresses the transition to the conductive layer of the dichroic dye contained in a polarizing film, and provides the optical laminated body which can prevent deterioration of a conductive layer.
The said optical laminated body is the 1st hardened | cured material layer comprised from the hardened | cured material of the curable composition containing a polymeric compound in one surface of the polarizing film containing a dichroic dye in polyvinyl alcohol-type resin, an adhesive layer, The optical laminated body in which the conductive layer was laminated | stacked in this order, The said 1st hardened | cured material layer is an optical laminated body whose absorbance increase rate represented by following formula (1) is 30% or less.
Absorbance ascent rate (%) = (Abs after dipping (360 nm)-Abs before dipping (360 nm)) / Abs before dipping (360 nm) × 100 (1)

Description

Optical stack

This invention relates to the optical laminated body used for an image display panel.

Conventionally, the optical laminated body by which the protective film was laminated | stacked through the adhesive agent on one surface of the polarizing film which adsorbed and oriented dichroic dyes, such as iodine, to the polyvinyl alcohol-type resin film is known. As an adhesive used in order to constitute such an optical laminated body, Patent Document 1 describes, for example, a photocationic curable adhesive (curable composition) containing an aliphatic epoxy, an alicyclic epoxy, and / or an oxetane, and a photopolymerization initiator. The cured cured product functions as an adhesive.

In recent years, transparent conductive films such as indium tin oxide (ITO) thin films have been widely used in display devices. For example, the transparent conductive film is formed on the opposite side to the contacting side of the liquid crystal layer of the transparent substrate constituting the liquid crystal cell of a liquid crystal display device using a liquid crystal cell such as an IPS (In-Plane Switching) method, to form an antistatic layer. It is known. In addition, the transparent conductive film in which the said transparent conductive film was formed on the transparent resin film is used for the electrode substrate of a touch panel, and is used combining the touch panel with a liquid crystal display device, an image display device, etc. used for a mobile telephone, a portable music player, etc., for example. Input devices are widespread.

Patent Document 1: Japanese Patent Publication No. 2008-063397

However, when laminating conductive layers, such as an ITO layer, on the polarizing film side of the optical laminated body of patent document 1 via an adhesive layer, the dichroic dye contained in a polarizing film is easy to permeate an adhesive layer comparatively, and to a conductive layer It may move, and may cause malfunction, such as a detection failure. Since the movement of the dichroic dye from such a polarizing film becomes remarkable especially in a high temperature, high humidity environment, the conductive layer by which the dichroic dye contained in a polarizing film transfers to a conductive layer through an adhesive layer even in a high temperature, high humidity environment. The optical laminated body which can prevent deterioration of is needed.

Therefore, the objective of this invention is providing the optical laminated body which can suppress the transition to the conductive layer of the dichroic dye contained in a polarizing film effectively, and can prevent deterioration of a conductive layer.

This invention provides the following suitable aspects [1]-[6].

[1] On one side of a polarizing film containing a dichroic dye in a polyvinyl alcohol-based resin, a first cured product layer composed of a cured product of a curable composition containing a polymerizable compound, an adhesive layer, and a conductive layer are As an optical laminated body laminated in order,

The optical laminated body whose said 1st hardened | cured material layer is 30% or less in absorbance increase rate represented by following formula (1):

Absorbance ascent rate (%) = (Abs after dipping (360 nm)-Abs before dipping (360 nm)) / Abs before dipping (360 nm) × 100 (1)

[In formula, Abs (360 nm) after immersion shows the absorbance in 360 nm after immersing hardened | cured material in 50% potassium iodide aqueous solution for 100 hours in the atmosphere of temperature 23 degreeC, 60% of a relative humidity, and Abs before immersion. (360 nm) shows the absorbance at 360 nm before immersion of the cured product in 50% aqueous potassium iodide solution.]

[2] On one side of the polarizing film containing a dichroic dye in polyvinyl alcohol-based resin, the first cured product layer composed of a cured product of the curable composition containing a polymerizable compound, the adhesive layer, and the conductive layer are As an optical laminated body laminated in order,

The said polymeric compound contains the oxetane compound which has two or more oxetanyl groups, and content of the said oxetane compound is 40 mass parts or more with respect to 100 mass parts of total amounts of all the polymeric compounds contained in a curable composition. .

[3] The optical laminate according to [1] or [2], wherein the thickness of the first cured product layer is 0.1 to 15 µm.

[4] The optical laminate according to any one of [1] to [3], wherein the cured product constituting the first cured product layer is a photocured product of the curable composition containing the polymerizable compound.

[5] The optical laminate according to any one of [1] to [4], wherein a second cured product layer and a protective film are laminated on a surface of the polarizing film opposite to the first cured product layer.

[6] The optical laminate according to [5], wherein the moisture permeability of the protective film is 1200 g / 24 hours or less at a temperature of 23 ° C. and a relative humidity of 55%.

The optical laminated body of this invention can suppress the movement to the conductive layer of the dichroic dye contained in a polarizing film, and can effectively suppress corrosion of a conductive layer.

BRIEF DESCRIPTION OF THE DRAWINGS The sectional drawing which shows the structure which is one aspect of the optical laminated body of this invention is shown.
2 is a cross-sectional view showing a configuration that is one embodiment of an optical laminate of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail. In addition, the scope of the present invention is not limited to embodiment described here, A various change is possible in the range which does not impair the meaning of this invention.

When the structure in one Embodiment of the optical laminated body of this invention is demonstrated based on FIG. 1, the optical laminated body 10 of this invention is the 1st hardened | cured material layer on one surface of the polarizing film 1 (2), the adhesion layer 3, and the conductive layer 4 have the structure laminated | stacked in this order. As needed, the protective film 6 may be provided in the surface on the opposite side to the 1st hardened | cured material layer of the polarizing film 1 via the 2nd hardened | cured material layer 5. In addition, in the embodiment of FIG. 1, the conductive layer 4 of the optical laminated body 10 is laminated | stacked on the board | substrate X. FIG.

In addition, the optical laminated body of this invention may have the 1st protective film 7 between the 1st hardened | cured material layer 2 and the adhesion layer 3. This embodiment is shown in FIG. 2. In the optical laminated body 10, as needed, on the surface opposite to the 1st hardened | cured material layer 2 of the polarizing film 1, through the 2nd hardened | cured material layer 5, the 2nd protective film 6 May be provided. 2, the conductive layer 4 of the optical laminated body 10 is laminated | stacked on the board | substrate X. As shown in FIG.

Hereinafter, each structural component of the optical laminated body of this invention is demonstrated in detail.

[First Cured Product Layer]

The optical laminated body of this invention may be called curable composition (Hereinafter, curable composition (1)) which contains a polymeric compound in one surface of the polarizing film containing a dichroic dye in polyvinyl alcohol-type resin. It has a 1st hardened | cured material layer comprised from the hardened | cured material of ().

As for the 1st hardened | cured material layer, the absorbance increase rate represented by following formula (1) is 30% or less.

Absorbance ascent rate (%) = (Abs after dipping (360 nm)-Abs before dipping (360 nm)) / Abs before dipping (360 nm) × 100 (1)

[In formula, Abs (360 nm) after immersion shows the absorbance in 360 nm after immersing hardened | cured material in 50% potassium iodide aqueous solution for 100 hours in the atmosphere of temperature 23 degreeC, 60% of a relative humidity, and Abs before immersion. (360 nm) shows the absorbance at 360 nm before immersion of the cured product in 50% aqueous potassium iodide solution.]

Even if the 1st hardened | cured material layer is immersed in 50% potassium iodide aqueous solution for 100 hours, the absorbance increase rate represented by said Formula (1) is 30% or less. This shows that the water absorption with respect to iodine (dichroic dye) of a 1st hardened | cured material layer is comparatively low. For this reason, the optical laminated body of this invention can suppress the movement to the 1st hardened | cured material layer of iodine (dichroic dye) contained in a polarizing film effectively, and the conductive layer by iodine (dichroic dye) ( For example, corrosion of the ITO layer) can be prevented. Moreover, the optical performance of an optical laminated body can be maintained.

The absorbance increase rate represented by the above formula (1) is preferably 25% or less, more preferably 20% or less, still more preferably 15% or less, and particularly preferably 10% or less. When the absorbance increase rate is equal to or less than the above value, the movement of the iodine (dichroic dye) contained in the polarizing film to the first cured product layer can be more effectively suppressed, and the corrosion of the conductive layer and the optical laminate The fall of optical performance can be prevented more effectively.

The polymeric compound contained in curable composition (1) will not be specifically limited if hardened | cured material which comprises a 1st hardened | cured material layer can be formed. Examples of the polymerizable compound include an active energy ray-curable resin composition, a water-soluble resin composition, a water-dispersible resin composition, and the like. Among these, an active energy ray-curable resin composition is preferable from the viewpoint of simplification of the process, and particularly, epoxy acrylate. (Meth) acrylate compound, an acrylamide compound, an oxetane compound, an epoxy compound containing urethane acrylate etc. are preferable.

In a preferable embodiment, the cured product constituting the first cured product layer is a photocured product of the curable composition containing a polymerizable compound. For this reason, as for the said polymeric compound, a photocurable compound is preferable.

It is preferable that a polymeric compound contains the oxetane compound (Hereinafter, it may be called "oxetane compound (A)") which has two or more oxetanyl group (oxetane ring) in a molecule | numerator.

An oxetane compound (A) is a compound which has two or more oxetanyl groups in a molecule | numerator, and may be an aliphatic compound, an alicyclic compound, or an aromatic compound. Specific examples of the oxetane compound (A) include 1,4-bis [{(3-ethyloxetan-3-yl) methoxy} methyl] benzene (also called xylenebisoxetane) and bis (3-ethyl- 3-oxetanylmethyl) ether, etc. are mentioned. These oxetane compounds (A) may be used individually, respectively, and may be used in combination of different multiple types. By containing an oxetane compound (A), a crosslinked density is high and a compact hardened | cured material can be obtained. By forming the hardened | cured material layer with a high crosslinking density in one surface of a polarizing film, it becomes possible to suppress the movement of a dichroic dye from a polarizing film effectively.

Content of an oxetane compound (A) is 40 mass parts or more with respect to 100 mass parts of total amounts of all the polymeric compounds contained in curable composition (1), Preferably it is 45 mass parts or more, More preferably, 50 It is more than a mass part. The content of the oxetane compound (A) is preferably 90 parts by mass or less, more preferably 80 parts by mass or less, more preferably 100 parts by mass of the total amount of all the polymerizable compounds contained in the curable composition (1). Preferably it is 70 mass parts or less, Especially preferably, it is 65 mass parts or less. The content of the oxetane compound (A) may be a combination of these lower limits and upper limits, and is preferably 40 parts by mass to 100 parts by mass of the total amount of all the polymerizable compounds included in the curable composition (1). 65 mass parts, More preferably, it may be 45 mass parts-60 mass parts.

In addition, content of an oxetane compound (A) is 35 mass parts or more with respect to 100 mass parts of total amounts of the said curable composition (1), Preferably it is 40 mass parts or more, More preferably, it is 45 mass parts or more. . When content of the said oxetane compound (A) is more than the said value, the movement to the 1st hardened | cured material layer of the dichroic dye contained in a polarizing film can be suppressed more effectively, and corrosion of a conductive layer and optical of an optical laminated body The fall of performance can be prevented more effectively.

It is preferable that a polymeric compound contains an epoxy compound (B) further. The epoxy compound is preferably an aliphatic epoxy compound (hereinafter sometimes referred to as "aliphatic epoxy compound (B1)") having two or more epoxy groups (B1), and an alicyclic epoxy compound having two or more epoxy groups (B2). (Hereinafter, it may be referred to as "alicyclic epoxy compound (B2)") and (B3) aromatic epoxy compound having one or more aromatic rings (hereinafter referred to as "aromatic epoxy compound (B3)"). It is at least one kind.

The aliphatic epoxy compound (B1) is a compound having at least two or more oxirane rings in the molecule bonded to aliphatic carbon atoms. As an aliphatic epoxy compound (B1), it is 1, 4- butanediol diglycidyl ether, 1, 6- hexanediol diglycidyl ether, cyclohexane dimethanol diglycidyl ether, neopentyl glycol diglycidyl ether, for example. Epoxy compounds such as bifunctional; Three or more functional epoxy compounds, such as a trimethylol propane triglycidyl ether and pentaerythritol tetraglycidyl ether, etc. are mentioned.

In the case of containing an aliphatic epoxy compound (B1), from the viewpoint of adhesion between the polarizing film and the protective film or the adhesive layer, a bifunctional epoxy compound having two oxirane rings bonded to aliphatic carbon atoms in the molecule (aliphatic di Also called an epoxy compound), and the aliphatic diepoxy compound represented by following formula (I) is more preferable. When a curable composition contains the aliphatic diepoxy compound represented by following formula (I) as an aliphatic epoxy compound (B1), the curable composition which is low in viscosity and easy to apply can be obtained.

In formula (I), Z is represented by a C1-C9 alkylene group, a C3-C4 alkylidene group, a bivalent alicyclic hydrocarbon group, or a formula -C _m H _2m -Z ¹ -C _n H _2n- Divalent group to be represented. -Z ¹ -represents -O-, -CO-O-, -O-CO-, -SO _2- , -SO- or CO-, and m and n each independently represent an integer of 1 or more. However, the sum of m and n is 9 or less.

The divalent alicyclic hydrocarbon group may be, for example, a divalent alicyclic hydrocarbon group having 4 to 8 carbon atoms, and examples thereof include divalent residues represented by the following formula (I-1).

Specific examples of the compound represented by formula (I) include diglycidyl ether of alkanediol; Diglycidyl ether of oligoalkylene glycol up to a repeating number of about 4; And diglycidyl ethers of alicyclic diols.

Examples of the diol (glycol) capable of forming the compound represented by the formula (I) include ethylene glycol, propylene glycol, 1,3-propanediol, 2-methyl-1,3-propanediol, and 2-butyl-2- Ethyl-1,3-propanediol, 1,4-butanediol, neopentylglycol, 3-methyl-2,4-pentanediol, 2,4-pentanediol, 1,5-pentanediol, 3-methyl-1, 5-pentanediol, 2-methyl-2,4-pentanediol, 2,4-diethyl-1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, 3,5-heptanediol Alkanediols, such as 1,8-octanediol, 2-methyl-1,8-octanediol, and 1,9-nonanediol;

Oligoalkylene glycols such as diethylene glycol, triethylene glycol, tetraethylene glycol and dipropylene glycol;

Alicyclic diols, such as cyclohexanediol and cyclohexane dimethanol, etc. are mentioned.

In this invention, as an aliphatic epoxy compound (B1), 1, 4- butanediol diglycidyl ether and 1, 6- hexanediol diglycidyl from a viewpoint of making it the curable composition which is low in viscosity and easy to apply | coat Ether and neopentyl glycol diglycidyl ether are preferable. 1,6-hexanediol diglycidyl ether and pentaerythritol polyglycidyl ether are preferable at the point which can maintain optical performance. As an aliphatic epoxy compound (B1), 1 type of aliphatic epoxy compounds may be used individually, or may be used in combination of other multiple types.

When curable composition (1) contains an aliphatic epoxy compound (B1), content of an aliphatic epoxy compound (B1) becomes like this. Preferably it is 1-40 with respect to 100 mass parts of total amounts of all the polymeric compounds contained in a curable composition. It is 3 mass parts, More preferably, it is 3-30 mass parts, More preferably, it is 5-20 mass parts, Especially 7-15 mass parts. When content of an aliphatic epoxy compound (B1) exists in the said range, the viscosity of curable composition (1) is low and it can be set as the composition which is easy to apply | coat.

The alicyclic epoxy compound (B2) is a compound having two or more epoxy groups bonded to an alicyclic ring in a molecule. An "epoxy group bonded to an alicyclic ring" is the following formula (a):

The oxygen atom -O- of bridging in the structure represented by this is meant. In said formula (a), m is an integer of 2-5.

In the formula (a), a compound in which one or more groups in the form in which one or more hydrogen atoms are removed from (CH ₂ ) _m is bonded to another chemical structure may be an alicyclic epoxy compound (B2). have. One or a plurality of hydrogen atoms in (CH ₂ ) _m may be appropriately substituted with a linear alkyl group such as a methyl group or an ethyl group.

Especially, the epoxycyclopentane structure [m = 3 in said Formula (a)] and epoxycyclohexane from a viewpoint that the glass transition temperature of hardened | cured material is high and is excellent in the adhesiveness between a polarizing film and a protective film. The alicyclic epoxy compound which has a structure [what is m = 4 in said Formula (a)] is preferable, and the alicyclic diepoxy compound represented by following formula (II) is more preferable. When the curable composition (1) contains an alicyclic diepoxy compound represented by the following formula (II) as the compound (B2), the cured product layer after the curable composition is cured has high elasticity, and cracks due to heat shrinkage of the polarizing film Can be suppressed.

In formula (II), R <^1> and R <^2> respectively independently represents a hydrogen atom or a C1-C6 alkyl group, and when the said alkyl group is C3 or more, you may have alicyclic structure. The alkyl group having 1 to 6 carbon atoms may be a linear or branched alkyl group, and examples of the alkyl group having an alicyclic structure include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, and the like.

In formula (II), X is an oxygen atom, a C1-C6 alkanediyl group, or following formula (IIa)-formula (IId):

The divalent group represented by either of

Examples of the alkanediyl group having 1 to 6 carbon atoms include methylene group, ethylene group, propane-1,2-diyl group and the like.

In the case where X in Formula (II) is a divalent group represented by any of Formulas (IIa) to (IId), Y ¹ to Y ⁴ in each formula are each independently an alkanediyl group having 1 to 20 carbon atoms. And when said alkanediyl group has 3 or more carbon atoms, it may have an alicyclic structure.

a and b respectively independently represent the integer of 0-20.

As a compound represented by Formula (II), the following compounds of A-G are mentioned, for example. In addition, the chemical formulas A to G shown thereafter correspond to the compounds A to G, respectively.

A: 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate

B: 3,4-epoxy-6-methylcyclohexylmethyl 3,4-epoxy-6-methylcyclohexanecarboxylate

C: ethylenebis (3,4-epoxycyclohexanecarboxylate)

D: bis (3,4-epoxycyclohexylmethyl) adipate

E: bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate

F: diethylene glycol bis (3,4-epoxycyclohexylmethyl ether)

G: ethylene glycol bis (3,4-epoxycyclohexylmethyl ether)

In the present invention, the alicyclic epoxy compound (B2) is more preferably 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate from the viewpoint of availability. In addition, 1,2-epoxy-4- (2-oxyranyl) cyclohexane adducts of 2,2-bis (hydroxymethyl) -1-butanol may be used from the viewpoint of effectively suppressing corrosion of the conductive layer. desirable. Specifically 1,2-epoxy-4- (2-oxyranyl) cyclo of 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate and 2,2-bis (hydroxymethyl) -1-butanol When a hexane adduct is combined and used as an alicyclic epoxy compound (B2), corrosion of a conductive layer can be suppressed more effectively. As an alicyclic epoxy compound (B2), 1 type of alicyclic epoxy compounds may be used individually, or may be used in combination of other multiple types.

When curable composition (1) contains an alicyclic epoxy compound (B2), content of an alicyclic epoxy compound (B2) is preferable with respect to 100 mass parts of total amounts of all the polymeric compounds contained in curable composition (1). Preferably it is 3-70 mass parts, More preferably, it is 10-60 mass parts, More preferably, it is 20-55 mass parts, Especially preferably, it is 25-50 mass parts. When content of an alicyclic epoxy compound (B2) exists in the said range, hardening by irradiation of active energy rays, such as an ultraviolet-ray, advances rapidly and can form the hardened | cured material layer of sufficient hardness easily.

The aromatic epoxy compound (B3) is a compound having one or more aromatic rings in the molecule, and specific examples thereof include the following.

Mono / polyglycidyl ethers of monohydric phenols or their alkylene oxide adducts having at least one aromatic ring such as phenol, cresol, butylphenol or the like, such as bisphenol A, bisphenol F or an alkylene oxide added thereto Glycidyl ether compounds and epoxy novolac resins of one compound;

Glycidyl ethers of aromatic compounds having two or more phenolic hydroxyl groups such as resorcinol, hydroquinone and catechol;

Mono / polyglycidyl ether compounds of aromatic compounds having two or more alcoholic hydroxyl groups such as benzenedimethanol, benzenediethanol and benzenedibutanol;

Glycidyl esters of polybasic acid aromatic compounds having two or more carboxylic acids such as phthalic acid, terephthalic acid and trimellitic acid;

Glycidyl esters of benzoic acids such as benzoic acid, toluic acid and naphthoic acid;

Epoxides of styrene oxide or divinylbenzene;

In the case of containing an aromatic epoxy compound (B3), glycidyl ethers of phenols, glycidyl ethers of aromatic compounds having two or more alcoholic hydroxyl groups, and glycidyl ethers of polyhydric phenols from the viewpoint of low viscosity of the curable composition It is preferable to contain at least 1 sort (s) chosen from the group of the cargo, the glycidyl ester of benzoic acid, the glycidyl ester of polybasic acid, the styrene oxide, or the epoxide of divinylbenzene.

Moreover, since the curability of a curable composition is improved, it is preferable that an epoxy equivalent is 80-500 as an aromatic epoxy compound (B3).

As an aromatic epoxy compound (B3), 1 type of aromatic epoxy compounds may be used individually, or may be used in combination of other multiple types.

A commercially available product can be used as an aromatic epoxy compound (B3), For example, Denacol EX-121, Denacol EX-141, Denacol EX-142, Denacol EX-145, Denacol EX-146, Denacol EX-147 , Denacol EX-201, Denacol EX-203, Denacol EX-711, Denacol EX-721, Oncoat EX-1020, Oncoat EX-1030, Oncoat EX-1040, Oncoat EX-1050, On Coat EX-1051, oncoat EX-1010, oncoat EX-1011, oncoat 1012 (above, manufactured by Nagase Chemtex); Ogsol PG-100, Ogsol EG-200, Ogsol EG-210, Ogsol EG-250 (above, manufactured by Osaka Gas Chemical Co., Ltd.); HP4032, HP4032D, HP4700 (above, manufactured by DIC Corporation); ESN-475V (manufactured by Shinnitetsu Chemical Co., Ltd.); Epicoat YX8800, jER828EL (manufactured by Mitsubishi Chemical Corporation); Mapruf G-0105SA, mapruf G-0130SP (manufactured by Nichi Oil Co., Ltd.); Epiclone N-665, Epiclone HP-7200 (above, manufactured by DIC Corporation); EOCN-1020, EOCN-102S, EOCN-103S, EOCN-104S, XD-1000, NC-3000, EPPN-501H, EPPN-501HY, EPPN-502H, NC-7000L (above, manufactured by Nippon Kayaku Co., Ltd.); Adecaglycile ED-501, adecaglycile ED-502, adecaglycile ED-509, adecaglycile ED-529, adecarazine EP-4000, adeca resin EP-4005, Adecarazine EP-4100, adecarazine EP-4901 (above, manufactured by ADEKA Corporation); TECHMORE VG-3101L, EPOX-MKR710, EPOX-MKR151 (above, Purintech Co., Ltd.), etc. are mentioned.

By containing an aromatic epoxy compound (B3), the said curable composition turns a curable composition into hydrophobic resin, and the hardened | cured material layer obtained by this also becomes hydrophobic. For this reason, the invasion of moisture from the outside under high temperature, high humidity can be prevented, and the movement of the dichroic dye (iodine) contained in a polarizing film can be suppressed effectively.

When an aromatic epoxy compound (B3) is included in curable composition (1), content of an aromatic epoxy compound (B3) becomes like this with respect to 100 mass parts of total amounts of all the polymeric compounds contained in the said curable composition (1) preferably. Is 1-70 mass parts, More preferably, it is 5-60 mass parts, More preferably, it is 7-55 mass parts, Especially preferably, it is 10-50 mass parts. When content of an aromatic epoxy compound (B3) exists in the said range, hydrophobicity of a hardened | cured material layer can be improved and the permeability of the dichroic dye (iodine) with respect to a hardened | cured material layer can be reduced.

Content of alicyclic epoxy compound (B2) with respect to content (WA) of oxetane compound (A), when curable composition (1) contains an oxetane compound (A) and an alicyclic epoxy compound (B2) (WB2) It is preferable that mass ratio (WB2 / WA) of () is 0.05-1.5.

When curable composition (1) contains an oxetane compound (A) and an aliphatic epoxy compound (B1), of content (WB1) of an aliphatic epoxy compound (B1) with respect to content (WA) of an oxetane compound (A) It is preferable that mass ratio (WB1 / WA) is 0.1-0.5.

When the curable composition (1) contains an oxetane compound (A) and an aromatic epoxy compound (B3), the content (WB3) of the aromatic epoxy compound (B1) to the content (WA) of the oxetane compound (A) It is preferable that mass ratio (WB3 / WA) is 0.1-1.5.

Curable composition (1) may contain polymeric compounds other than an oxetane compound (A) and an epoxy compound (B). Specifically, an aliphatic monoepoxy compound, an alicyclic monoepoxy compound, etc. are mentioned.

The content of the polymerizable compound included in the curable composition (1) is preferably 80 to 100 parts by mass, more preferably 90 to 99.5 parts by mass, further preferably 100 parts by mass of the total mass of the curable composition (1). Preferably it is 95-99 mass parts. When content of a polymeric compound exists in the said range, the movement to the 1st hardened | cured material layer of the dichroic dye contained in a polarizing film can be suppressed more effectively.

The curable composition usually contains a polymerization initiator for starting the polymerization. A polymerization initiator may be a photoinitiator (for example, a photocationic polymerization initiator, an optical radical polymerization initiator), or a thermal polymerization initiator. For example, when a curable composition contains the said oxetane compound (A), an epoxy compound (B), etc. as a polymeric compound, it is preferable to use a photocationic polymerization initiator as a polymerization initiator.

The photocationic polymerization initiator generates cationic species or Lewis acids by irradiation of active energy rays such as visible rays, ultraviolet rays, X-rays, or electron beams to start the polymerization reaction of the cationic polymerizable compound. Since a photocationic polymerization initiator acts catalytically with light, even if it mixes with a polymeric compound, it is excellent in storage stability and workability. As a compound which produces | generates a cationic species or Lewis acid by irradiation of an active energy ray, Onium salt, such as an aromatic iodonium salt and an aromatic sulfonium salt, an aromatic diazonium salt, an iron-arene complex, etc. are mentioned, for example.

An aromatic iodonium salt is a compound which has a diaryl iodonium cation, As this cation, a diphenyl iodonium cation is mentioned typically. The aromatic sulfonium salt is a compound having a triarylsulfonium cation, and examples of the cation include a triphenylsulfonium cation and a 4,4'-bis (diphenylsulfonio) diphenylsulphide cation. . An aromatic diazonium salt is a compound which has a diazonium cation, As this cation, a benzenediazonium cation is mentioned typically. In addition, the iron-arene complex is typically a cyclopentadienyl iron (II) arene cation complex salt.

The cation shown above is paired with an anion (anion) to constitute a photocationic polymerization initiator. Examples of the anion constituting the cationic polymerization initiator, a special take over the anion _{[(Rf) n PF 6-} n] -, hexafluorophosphate anion PF ₆ ^-, antimonate anion SbF ₆ ^{hexafluoro-in,} pentafluoro-hydroxy antimonate anion SbF ₅ (OH) ^-, hexafluorophosphate acetoxy anion AsF ₆ ^-, anion BF ₄ ^{tetrafluoro-tetrakis} (pentafluorophenyl) borate anion _{B (C 6 F 5) 4} - , etc. Can be mentioned. In the curing and the point of view of safety of the cured product obtained layer Among these, the polymerizable compound, turned over the cationic polymerization initiator special anion _{[(Rf) n PF 6-} n] -, a phosphate anion PF ₆ ^{hexafluoro-in} is preferably Do.

A photocationic polymerization initiator may be used individually by 1 type, or may be used in combination of other multiple types. Especially, since an aromatic sulfonium salt has ultraviolet absorption characteristic also in the wavelength range of 300 nm vicinity, since it is excellent in sclerosis | hardenability and can bring the hardened | cured material which has favorable mechanical strength and adhesive strength, it is preferable.

Content of the polymerization initiator in curable composition (1) is 0.5-10 mass parts normally with respect to 100 mass parts of polymeric compounds, Preferably it is 6 mass parts or less, More preferably, it is 3 mass parts or less. When content of a polymerization initiator exists in the said range, a polymeric compound can fully be hardened | cured and high mechanical strength and adhesive strength can be provided to the hardened | cured material layer comprised from the hardened | cured material obtained. On the other hand, when the quantity becomes excessively large, there exists a possibility that the product from a photocationic polymerization initiator may react with the hydroxyl group of the polyvinyl alcohol which comprises a polarizing film, and may reduce the optical performance of a polarizing film.

In the present invention, the curable composition (1) may include an additive generally used in the curable composition as necessary. Such additives include, for example, ion trapping agents, antioxidants, chain transfer agents, polymerization accelerators (polyols, etc.), sensitizers, sensitizers, light stabilizers, tackifiers, thermoplastic resins, fillers, flow regulators, plasticizers, defoamers, leveling agents. A silane coupling agent, a pigment | dye, an antistatic agent, a ultraviolet absorber, etc. are mentioned.

As a sensitizer, a photosensitizer is mentioned, for example. A photosensitizer is a compound which shows maximum absorption in the wavelength longer than the maximum absorption wavelength which a photocationic polymerization initiator shows, and promotes the polymerization start reaction by a photocationic polymerization initiator. In addition, photosensitizers are compounds that further promote the action of photosensitizers. Depending on the kind of protective film, it is preferable to mix | blend such a photosensitizer and also a photosensitizer. By mix | blending these photosensitizers and photosensitizers, the hardened | cured material which has a desired performance can be formed also when the film with low UV permeability is used.

It is preferable that a photosensitizer is a compound which shows maximum absorption in the light of wavelength longer than 380 nm, for example. Examples of such photosensitizers include anthracene-based compounds described below.

9,10-dimethoxyanthracene,

9,10-diethoxyanthracene,

9,10-dipropoxyanthracene,

9,10-diisopropoxyanthracene,

9,10-dibutoxyanthracene,

9,10-dipentyloxyanthracene,

9,10-dihexyloxyanthracene,

9,10-bis (2-methoxyethoxy) anthracene,

9,10-bis (2-ethoxyethoxy) anthracene,

9,10-bis (2-butoxyethoxy) anthracene,

9,10-bis (3-butoxypropoxy) anthracene,

2-methyl- or 2-ethyl-9,10-dimethoxyanthracene,

2-methyl- or 2-ethyl-9,10-diethoxyanthracene,

2-methyl- or 2-ethyl-9,10-dipropoxycanthracene,

2-methyl- or 2-ethyl-9,10-diisopropoxycanthracene,

2-methyl- or 2-ethyl-9,10-dibutoxyanthracene,

2-methyl- or 2-ethyl-9,10-dipentyloxyanthracene,

2-methyl- or 2-ethyl-9,10-dihexyloxyanthracene.

Curable composition (1) is obtained by mixing a polymeric compound, a polymerization initiator, and an additive as needed. The 1st hardened | cured material layer apply | coated the curable composition 1 by apply | coating on a polarizing film or this 1st protective film when using a 1st protective film, and irradiating active energy rays, such as an ultraviolet-ray and an electron beam, The curable composition can be cured and formed.

Various coating methods, such as a doctor blade, a wire bar, a die coater, a comma coater, a gravure coater, can be used for coating of the curable composition 1, for example. The light source of an active energy ray is mentioned as a light source at the time of hardening curable composition (1). The light source of an active energy ray should just generate | occur | produce ultraviolet-ray, an electron beam, X-rays, etc., for example. In particular, a light source having a luminescence distribution at a wavelength of 400 nm or less is preferable, and a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultra high pressure mercury lamp, a chemical lamp, a black light lamp, a microwave excited mercury lamp, a metal halide lamp, and the like can be given.

Although the light irradiation intensity | strength at the time of hardening curable composition 1 differs for every composition, it is preferable that the light irradiation intensity | strength of the wavelength range effective for activation of a polymerization initiator is 0.1-1000 mW / cm <2>. When the light irradiation intensity at the time of hardening of the curable composition 1 is too small, the time taken until reaction fully advances becomes long, On the contrary, when light irradiation intensity is too large, the superposition | polymerization of the heat and curable composition 1 radiated | emitted from a lamp | ramp There is a possibility of causing deterioration of the film to be adhered due to heat generation at the time. Although the light irradiation time at the time of hardening of curable composition (1) is controlled for every composition, it does not specifically limit, It is set so that accumulated light quantity expressed as a product of light irradiation intensity and light irradiation time may be 10-5000 mJ / cm <2>. desirable. When accumulated light amount is too small, generation | occurrence | production of the active species derived from a polymerization initiator may not be enough, and the hardening obtained may become inadequate. Moreover, when accumulated light amount is too big | large, irradiation time becomes very long and it becomes disadvantageous for productivity improvement.

Moreover, when hardening a curable composition by irradiation of an active energy ray, all functions of an optical laminated body, such as the polarization degree, a transmittance | permeability and a color of a polarizing film, and the transparency of the various films which comprise a protective film and an optical layer, fall, for example. It is preferable to harden on the conditions which do not.

In the optical laminated body of this invention, although the thickness of a 1st hardened | cured material layer does not have a restriction | limiting in particular, Preferably it is 0.1-15 micrometers, More preferably, it is 0.5-10 micrometers, More preferably, it is 0.5-7 micrometers to be. If the thickness of a 1st hardened | cured material layer is more than a lower limit, the movement of a dichroic dye can be suppressed effectively, and if it is below the said upper limit, a curable composition can fully be hardened.

In the optical laminated body of this invention, the said absorbance increase rate of a 1st hardened | cured material layer is 30%, and the water absorption with respect to a dichroic dye is comparatively low. Usually, in a high temperature, high humidity environment, although the movement of a dichroic dye can be accelerated by the invasion of moisture from the outside, in the optical laminated body of this invention, it is the 1st hardened | cured material layer of the dichroic dye contained in a polarizing film. It is possible to effectively suppress the movement of. For this reason, even if it puts in a high temperature, high humidity environment, corrosion of a conductive layer can be prevented effectively and optical performance can be maintained. In addition, when the adhesion layer which comprises an optical laminated body contains an ionic compound as an antistatic agent etc., the ionic compound which exists in an adhesion layer passes through the protective film which comprises an optical laminated body, and is made into a polarizing film. It may move, causing interaction with the dichroic dye in a polarizing film, and may reduce the optical performance of an optical laminated body. In the optical laminated body of this invention, since the said 1st hardened | cured material layer exists between a polarizing film and an adhesion layer, the movement of an ionic compound from an adhesion layer can be suppressed effectively, and, thereby, the optical performance of an optical laminated body. Can be prevented from deteriorating.

Moreover, a 1st hardened | cured material layer also plays a role as an adhesive bond layer which adhere | attaches a polarizing film, a protective film, or an adhesion layer. In that case, especially in the protective film which an ionic compound etc. are easy to permeate | transmit, the optical performance fall of an optical laminated body can be prevented.

[Adhesive layer]

As an adhesive which comprises an adhesion layer, a conventionally well-known adhesive can be used without a restriction | limiting especially, For example, the adhesive which has acrylic resin, rubber resin, urethane resin, silicone resin, polyvinyl ether resin, etc. as a base polymer can be used. In addition, an energy radiation curable adhesive, a thermosetting adhesive, etc. may be sufficient. Among these, the adhesive which used acrylic resin which is excellent in transparency, adhesive force, rework property, weather resistance, heat resistance, etc. as a base polymer is suitable.

In this invention, when an adhesion layer contains acrylic resin, it is not specifically limited as this acrylic resin, A conventionally well-known thing can be used. Especially, it is preferable that the adhesion layer contained in the optical laminated body of this invention contains the following acrylic resin (P) from a viewpoint of adhesiveness and rework property.

Acrylic resin (P) is a following formula (III):

[In formula, R <a> represents _a hydrogen atom or a methyl group, R <_b> represents the C1-C14 alkyl group which may be substituted by the C1-C10 alkoxy group.]

It originates in the unsaturated monomer (P2) (henceforth a "polar functional group containing monomer") which has a structural unit derived from the (meth) acrylic-acid alkylester (P1) represented by the main component as a main component, and has a polar functional group. It is an acrylic resin containing a structural unit.

Here, in this specification, (meth) acrylic acid means that any of acrylic acid or methacrylic acid may be good, and "(meth)" when it is called (meth) acrylate etc. is also the same meaning.

As (meth) acrylic-acid alkylester (P1) represented by Formula (III), linear alkyl acrylates, such as methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, n-octyl acrylate, and lauryl acrylate; Branched alkyl acrylates such as isobutyl acrylate, 2-ethylhexyl acrylate and isooctyl acrylate; Linear alkyl methacrylates such as methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, n-octyl methacrylate and lauryl methacrylate; Branched methacrylic acid alkyl esters such as isobutyl methacrylate, 2-ethylhexyl methacrylate and isooctyl methacrylate; 2-methoxyethyl acrylate, ethoxymethyl acrylate, 2-methoxyethyl methacrylate, ethoxymethyl methacrylate, etc. are mentioned.

Among these, n-butyl acrylate is preferable, and it is preferable that n-butyl acrylate is 50 mass% or more with respect to the total amount of all the monomers which comprise an acrylic resin (P) specifically. These (meth) acrylic-acid alkylesters (P1) may be used individually, respectively, and may be used in combination of different multiple types.

In the polar functional group-containing monomer (P2), examples of the polar functional group include heterocyclic groups including free carboxyl groups, hydroxyl groups, amino groups, and epoxy groups. The polar functional group-containing monomer (P2) is preferably a (meth) acrylic acid compound having a polar functional group. As an example, Unsaturated monomer which has free carboxyl groups, such as acrylic acid, methacrylic acid, and (beta) -carboxyethyl acrylate; Hydroxyl groups such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2- or 3-chloro-2-hydroxypropyl (meth) acrylate, and diethylene glycol mono (meth) acrylate Unsaturated monomers; Acryloylmorpholine, vinyl caprolactam, N-vinyl-2-pyrrolidone, tetrahydrofurfuryl (meth) acrylate, caprolactone modified tetrahydrofurfuryl acrylate, 3,4-epoxycyclohexylmethyl (meth Unsaturated monomers having heterocyclic groups such as) acrylate, glycidyl (meth) acrylate and 2,5-dihydrofuran; And unsaturated monomers having an amino group different from heterocycles such as N, N-dimethylaminoethyl (meth) acrylate. These polar functional group containing monomers may be used independently, respectively and may use different multiple types.

It is preferable that a polar functional group containing monomer (P2) is an unsaturated monomer which has a hydroxyl group. Moreover, in addition to the unsaturated monomer which has a hydroxyl group, it is also effective to use together the unsaturated monomer which has another polar functional group, for example, the unsaturated monomer which has a free carboxyl group.

In acrylic resin (P), the structural unit derived from the (meth) acrylic-acid alkylester (P1) represented by said Formula (III) is with respect to 100 mass parts of total amounts of all the structural units which comprise acrylic resin (P). For example, it is 50-100 mass parts. The structural unit derived from a polar functional group containing monomer (P2) is 0.1-20 mass parts with respect to 100 mass parts of total amounts of all the structural units which comprise acrylic resin (P), for example.

Acrylic resin (P) may contain the structural unit derived from the monomer different from the (meth) acrylic-acid alkylester (P1) and polar functional group containing monomer (P2) represented by said Formula (III). Examples of these include a structural unit derived from an unsaturated monomer (P3) (hereinafter sometimes referred to as an "aromatic ring-containing monomer") having one olefinic double bond and at least one aromatic ring in a molecule, and an alicyclic type in a molecule. Structural unit derived from the structural unit derived from the (meth) acrylic acid ester which has a structure, the structural unit derived from a styrene-type monomer, the structural unit derived from a vinylic monomer, and the monomer which has several (meth) acryloyl groups in a molecule | numerator. Etc. can be mentioned.

It is preferable that the unsaturated monomer (aromatic ring containing monomer) (P3) which has one olefinic double bond and at least 1 aromatic ring in a molecule | numerator has a (meth) acryloyl group as group containing an olefinic double bond. As the example, benzyl (meth) acrylate, neopentyl glycol benzoate (meth) acrylate, etc. are mentioned, Especially, a formula (IV):

[Wherein, R ₃ represents a hydrogen atom or a methyl group, n is an integer of 1 to 8, R ₄ is a hydrogen atom, an alkyl group having 1 to 9 carbon atoms, an aralkyl group having 7 to 11 carbon atoms or an aryl having 6 to 10 carbon atoms; Represents a group]

The aromatic ring-containing (meth) acrylic compound represented by the above is preferable.

Examples of the alkyl group having 1 to 9 carbon atoms include methyl, butyl and nonyl. Examples of the aralkyl group having 7 to 11 carbon atoms include benzyl, phenethyl, naphthylmethyl and the like. Examples of the aryl group having 6 to 10 carbon atoms include phenyl, tolyl and naphthyl.

Examples of the aromatic ring-containing (meth) acrylic compound represented by formula (IV) include (meth) acrylic acid 2-phenoxyethyl, (meth) acrylic acid 2- (2-phenoxyethoxy) ethyl, and ethylene oxide-modified nonylphenol ( Meth) acrylic acid ester, (meth) acrylic acid 2- (o-phenylphenoxy) ethyl, etc. are mentioned. These aromatic ring containing monomers may be used independently, respectively and may be used in combination of different multiple types. Among these, 2-phenoxyethyl (meth) acrylate [compound of R < ₄ > H, n = 1 in said Formula (IV)], (meth) acrylic-acid 2- (o-phenylphenoxy) ethyl [the said formula ( R ₄ = o-phenyl, compound of n = 1 in IV)], or 2- (2-phenoxyethoxy) ethyl (meth) acrylic acid [R ₄ = H in formula (IV), n = 2 Compound] is suitable as one of the aromatic ring-containing monomers (P3) constituting the acrylic resin (P).

The alicyclic structure in the structural unit derived from the (meth) acrylic acid ester which has an alicyclic structure in a molecule | numerator is a cycloparaffin structure of carbon number 5 or more normally, Preferably it is 5-7. Specific examples of the acrylic acid ester having an alicyclic structure include isobornyl acrylate, cyclohexyl acrylate, dicyclopentanyl acrylate, cyclododecyl acrylate, methylcyclohexyl acrylate, trimethylcyclohexyl acrylate, tert-butylcyclohexyl acrylate, and α-E. Cyclohexyl oxyacrylate, cyclohexyl acrylate, etc. are mentioned, As a specific example of the methacrylic acid ester which has an alicyclic structure, isobornyl methacrylate, cyclohexyl methacrylate, dicyclopentanyl methacrylate, and methacrylic acid Cyclododecyl, methylcyclohexyl methacrylate, trimethylcyclohexyl methacrylate, tert-butylcyclohexyl methacrylate, cyclohexyl methacrylate, and the like.

Specific examples of the styrene monomers include alkylstyrenes such as methyl styrene, dimethyl styrene, trimethyl styrene, ethyl styrene, diethyl styrene, triethyl styrene, propyl styrene, butyl styrene, hexyl styrene, heptyl styrene and octyl styrene in addition to styrene; Halogenated styrenes such as fluorostyrene, chlorostyrene, bromostyrene, dibromostyrene and iodine styrene; Furthermore, nitro styrene, acetyl styrene, methoxy styrene, divinylbenzene, etc. are mentioned.

Specific examples of the vinyl monomers include fatty acid vinyl esters such as vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate and vinyl laurate; Vinyl halides such as vinyl chloride and vinyl bromide; Vinylidene halides such as vinylidene chloride; Nitrogen-containing aromatic vinyls such as vinylpyridine, vinylpyrrolidone and vinyl carbazole; Conjugated diene monomers such as butadiene, isoprene and chloroprene; Furthermore, acrylonitrile, methacrylonitrile, etc. are mentioned.

As a specific example of the monomer which has a some (meth) acryloyl group in a molecule | numerator, 1, 4- butanediol di (meth) acrylate, 1, 6- hexanediol di (meth) acrylate, and 1, 9- nonane diol di ( Two molecules in a molecule such as meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate and tripropylene glycol di (meth) acrylate Monomers having a meth) acryloyl group; The monomer etc. which have three (meth) acryloyl groups in molecules, such as a trimethylol propane tri (meth) acrylate, are mentioned.

Monomers different from the (meth) acrylic-acid alkylester (P1) and polar functional group containing monomer (P2) represented by Formula (III) can be used individually or in combination of 2 or more types, respectively. When contained in an adhesive, in the acrylic resin (P), the structural unit derived from monomers different from a (meth) acrylic-acid alkylester (P1) and a polar functional group containing monomer (P2) is the whole which comprises acrylic resin (P). It is 0-30 mass parts normally with respect to 100 mass parts of total amounts of a structural unit.

The resin component which comprises an adhesive composition contains two or more types of acrylic resin containing the structural unit derived from the (meth) acrylic-acid alkylester (P1) and polar functional group containing monomer (P2) represented by said Formula (III). It may be. Moreover, acrylic resin etc. which have a structural unit derived from the acrylic resin (P) different from it, for example, the (meth) acrylic-acid alkylester of Formula (III), and do not contain a polar functional group are mixed and used for acrylic resin (P), Also good. Acrylic resin (P) containing the structural unit derived from the (meth) acrylic-acid alkylester (P1) and polar functional group containing monomer (P2) represented by Formula (III) is 100 mass of the total amount of acrylic resin contained in an adhesion layer. For example, the amount may be 70 parts by mass or more.

Acrylic resin (P) which is a copolymer of the monomer mixture containing the (meth) acrylic-acid alkylester (P1) and polar functional group containing monomer (P2) represented by Formula (III) is standard polystyrene by gel permeation chromatography (GPC). It is preferable that the weight average molecular weight (Mw) of conversion is the range of 1 million-2 million. If the weight average molecular weight of standard polystyrene is in the said range, adhesiveness under high temperature, high humidity will improve, and there exists a tendency for the possibility of peeling and lifting to arise between a conductive layer and an adhesion layer, and also reworkability improves. There is a tendency. Moreover, even if the dimension of a polarizing film changes, an adhesion layer follows a change of the dimension, and it becomes easy to change, for example, when the optical laminated body is bonded to a liquid crystal cell, the difference between the brightness of the peripheral part of a liquid crystal cell, and the brightness of a center part is changed. There is a tendency that white spots and color unevenness are suppressed.

It is preferable that the molecular weight distribution represented by ratio (Mw / Mn) of a weight average molecular weight (Mw) and a number average molecular weight (Mn) is a range of 3-7. If the molecular weight distribution (Mw / Mn) is in the range of 3 to 7, the occurrence of problems such as a white spot can be suppressed even when the liquid crystal display panel or the liquid crystal display device is exposed to high temperature.

Moreover, it is preferable that the glass transition temperature of the said acrylic resin (P) exists in the range of -10-60 degreeC from a viewpoint of adhesive expression. The glass transition temperature of the resin can generally be measured by a differential scanning calorimeter.

Acrylic resin (P) can be manufactured by well-known various methods, such as a solution polymerization method, an emulsion polymerization method, a bulk polymerization method, suspension polymerization method, for example. In manufacture of acrylic resin (P), a polymerization initiator is used normally. It is preferable that content of a polymerization initiator is 0.001-5 mass parts with respect to a total of 100 mass parts of all the monomers used for manufacture of an acrylic resin.

As a polymerization initiator, a thermal polymerization initiator, a photoinitiator, etc. are used. As a photoinitiator, 4- (2-hydroxyethoxy) phenyl (2-hydroxy-2-propyl) ketone etc. are mentioned, for example. As the thermal polymerization initiator, for example, 2,2'-azobisisobutyronitrile, 2,2'-azobis (2-methylbutyronitrile), 1,1'-azobis (cyclohexane-1-carbonitrile) , 2,2'-azobis (2,4-dimethylvaleronitrile), 2,2'-azobis (2,4-dimethyl-4-methoxyvaleronitrile), dimethyl-2,2'-azo Azo compounds such as bis (2-methylpropionate) and 2,2'-azobis (2-hydroxymethylpropionitrile); Lauryl peroxide, tert-butylhydroperoxide, benzoyl peroxide, tert-butylperoxybenzoate, cumene hydroperoxide, diisopropylperoxydicarbonate, dipropylperoxydicarbonate, tert-butylperoxy neodecanoate organic peroxides such as tert-butylperoxy pivalate and (3,5,5-trimethylhexanoyl) peroxide; Inorganic peroxides such as potassium persulfate, ammonium persulfate and hydrogen peroxide; and the like. Moreover, the redox type initiator etc. which used a peroxide and a reducing agent together can also be used as a polymerization initiator.

As a manufacturing method of acrylic resin (P), the solution polymerization method is especially preferable. When the specific example of the solution polymerization method is given and demonstrated, the method of mixing a desired monomer and an organic solvent, adding a thermal-polymerization initiator in nitrogen atmosphere, and stirring at 40-90 degreeC, Preferably 50-80 degreeC for 3 to 10 hours Can be mentioned. In addition, in order to control reaction, you may add a monomer and a thermal-polymerization initiator continuously or intermittently during superposition | polymerization, or may add in the state dissolved in an organic solvent. Here, as an organic solvent, For example, aromatic hydrocarbons, such as toluene and xylene; Esters such as ethyl acetate and butyl acetate; Aliphatic alcohols such as propyl alcohol and isopropyl alcohol; Ketones, such as acetone, methyl ethyl ketone, and methyl isobutyl ketone, etc. can be used.

It is preferable that the adhesion layer contained in the optical laminated body of this invention is comprised using acrylic resin (P) and a crosslinking agent together. As a crosslinking agent, it is a compound which reacts with the structural unit derived from especially polar functional group containing monomer (P2) in acrylic resin (P), and crosslinks acrylic resin. Specifically, an isocyanate compound, an epoxy compound, an aziridine compound, a metal chelate compound, etc. are illustrated. Among these, an isocyanate type compound, an epoxy type compound, and an aziridine type compound have at least 2 functional groups in a molecule | numerator which can react with the polar functional group in acrylic resin (P).

An isocyanate type compound is a compound which has at least 2 isocyanato group (-NCO) in a molecule | numerator, For example, tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, di Phenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate, etc. are mentioned. Moreover, the adduct body which made these isocyanate type compounds react with polyols, such as glycerol and a trimethylol propane, and also made the isocyanate type compound into dimer, trimer, etc. can be a crosslinking agent used for an adhesive. You may use it in mixture of 2 or more types of isocyanate compounds.

An epoxy compound is a compound which has at least 2 epoxy groups in a molecule | numerator, for example, bisphenol-A epoxy resin, ethylene glycol diglycidyl ether, polyethyleneglycol diglycidyl ether, glycerin diglycidyl ether, and glycerin triglycis Dyl ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane triglycidyl ether, N, N- diglycidyl aniline, N, N, N ', N'- tetraglycidyl-m- Xylenediamine, 1, 3-bis (N, N'- diglycidyl aminomethyl) cyclohexane, etc. are mentioned. You may mix and use 2 or more types of epoxy compounds.

The aziridine-based compound is a compound having at least two skeletons of a three-membered ring composed of one nitrogen atom and two carbon atoms, also called ethyleneimine, in a molecule, for example diphenylmethane-4,4'-bis (1-aziridine Carboxamide), toluene-2,4-bis (1-aziridinecarboxamide), triethylenemelamine, isophthaloylbis-1- (2-methylaziridine), tris-1-aziridinylphosphine Oxide, hexamethylene-1,6-bis (1-aziridinecarboxamide), trimethylolpropane tris-β-aziridinylpropionate, tetramethylolmethane tris-β-aziridinylpropionate and the like Can be mentioned.

Examples of the metal chelate compound include compounds in which acetylacetone and ethyl acetoacetate are coordinated with polyvalent metals such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium and zirconium. have.

Among these crosslinking agents, an isocyanate compound, particularly an xylylene diisocyanate, tolylene diisocyanate or hexamethylene diisocyanate, or an adduct body obtained by reacting these isocyanate compounds with a polyol such as glycerol or trimethylolpropane, and these isocyanate compounds Dimers, trimers, and the like, and mixtures of these isocyanate compounds are preferably used. When a polar functional group containing monomer (P2) has a polar functional group chosen from a free carboxyl group, a hydroxyl group, an amino group, and an epoxy group, it is especially preferable to use at least 1 type of isocyanate type compound as a crosslinking agent. Among these, suitable isocyanate compounds include adducts obtained by reacting tolylene diisocyanate and tolylene diisocyanate with polyols, dimers of tolylene diisocyanate and trimers of tolylene diisocyanate, and also hexamethylene diisocyanate and hexamethylene diisocyanate. The adduct body reacted to the dimer, the dimer of hexamethylene diisocyanate, and the trimer of hexamethylene diisocyanate are mentioned.

In the adhesion layer which comprises the optical laminated body of this invention, a crosslinking agent may be 0.01-10 mass parts with respect to 100 mass parts of acrylic resin (P), for example. If the amount of the crosslinking agent is within the above range, the durability of the pressure-sensitive adhesive layer tends to be improved, and the white spot of the liquid crystal display panel tends to be less visible, which is preferable.

In this invention, it is preferable to contain a silane compound in the adhesive which comprises an adhesion layer, and it is especially preferable to contain a silane compound in the acrylic resin before mix | blending a crosslinking agent. A silane type compound can ensure high adhesive force with respect to a display panel by including a silane type compound in order to improve the adhesive force with respect to glass.

Examples of the silane compound include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, and N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- ( 3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-mercaptopropyl Trimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyldimethoxymethylsilane, 3-glycidoxypropylethoxydimethylsilane and the like Can be mentioned. These silane compounds may be used alone, or may be used in combination of two or more thereof.

The silane compound may be a silicone oligomer type. When a silicone oligomer is represented by the form of a (monomer)-(monomer) copolymer, the following are mentioned, for example.

3-mercaptopropyltrimethoxysilane-tetramethoxysilane copolymer, 3-mercaptopropyltrimethoxysilane-tetraethoxysilane copolymer, 3-mercaptopropyltriethoxysilane-tetramethoxysilane copolymer And mercaptopropyl group-containing copolymers such as 3-mercaptopropyltriethoxysilane-tetraethoxysilane copolymer;

Mercaptomethyltrimethoxysilane-tetramethoxysilane copolymer, mercaptomethyltrimethoxysilane-tetraethoxysilane copolymer, mercaptomethyltriethoxysilane-tetramethoxysilane copolymer and mercaptomethyltrier Copolymers containing a mercaptomethyl group such as a oxysilane-tetraethoxysilane copolymer;

3-methacryloyloxypropyltrimethoxysilane-tetramethoxysilane copolymer, 3-methacryloyloxypropyltrimethoxysilane-tetraethoxysilane copolymer, 3-methacryloyloxypropyltrier Methoxysilane-tetramethoxysilane copolymer, 3-methacryloyloxypropyltriethoxysilane-tetraethoxysilane copolymer, 3-methacryloyloxypropylmethyldimethoxysilane-tetramethoxysilane copolymer, 3-methacryloyloxypropylmethyldimethoxysilane-tetraethoxysilane copolymer, 3-methacryloyloxypropylmethyldiethoxysilane-tetramethoxysilane copolymer and 3-methacryloyloxypropylmethyldie Copolymers containing methacryloyloxypropyl groups such as oxysilane-tetraethoxysilane copolymers;

3-acryloyloxypropyltrimethoxysilane-tetramethoxysilane copolymer, 3-acryloyloxypropyltrimethoxysilane-tetraethoxysilane copolymer, 3-acryloyloxypropyltriethoxysilane- Tetramethoxysilane copolymer, 3-acryloyloxypropyltriethoxysilane-tetraethoxysilane copolymer, 3-acryloyloxypropylmethyldimethoxysilane-tetramethoxysilane copolymer, 3-acryloyl Oxypropylmethyldimethoxysilane-tetraethoxysilane copolymer, 3-acryloyloxypropylmethyldiethoxysilane-tetramethoxysilane copolymer and 3-acryloyloxypropylmethyldiethoxysilane-tetraethoxysilane co Copolymers containing acryloyloxypropyl groups such as polymers;

Vinyltrimethoxysilane-tetramethoxysilane copolymer, vinyltrimethoxysilane-tetraethoxysilane copolymer, vinyltriethoxysilane-tetramethoxysilane copolymer, vinyltriethoxysilane-tetraethoxysilane co Polymers, vinylmethyldimethoxysilane-tetramethoxysilane copolymers, vinylmethyldimethoxysilane-tetraethoxysilane copolymers, vinylmethyldiethoxysilane-tetramethoxysilane copolymers and vinylmethyldiethoxysilane-tetraethoxy Vinyl group-containing copolymers such as silane copolymers;

3-aminopropyltrimethoxysilane-tetramethoxysilane copolymer, 3-aminopropyltrimethoxysilane-tetraethoxysilane copolymer, 3-aminopropyltriethoxysilane-tetramethoxysilane copolymer, 3- Aminopropyltriethoxysilane-tetraethoxysilane copolymer, 3-aminopropylmethyldimethoxysilane-tetramethoxysilane copolymer, 3-aminopropylmethyldimethoxysilane-tetraethoxysilane copolymer, 3-aminopropyl Amino group-containing copolymers such as methyldiethoxysilane-tetramethoxysilane copolymer and 3-aminopropylmethyldiethoxysilane-tetraethoxysilane copolymer;

These silane compounds are in many cases liquid. The blending amount of the silane compound in the pressure-sensitive adhesive may be, for example, 0.01 to 10 parts by mass with respect to 100 parts by mass of the acrylic resin (P) (the total amount thereof when two or more kinds are used). When the amount of the silane compound with respect to 100 parts by mass of the acrylic resin (P) is within the above range, the adhesion between the pressure-sensitive adhesive layer and the substrate (or liquid crystal cell) is improved, and bleed-out of the silane-based compound from the pressure-sensitive adhesive layer is preferable. It is preferable because it tends to be suppressed.

The pressure-sensitive adhesive layer may contain an ionic compound. The ionic compound can function as an antistatic agent. Especially when acrylic resin (P) contains the aromatic ring containing (meth) acrylic compound represented by said Formula (IV), and n in Formula (IV) is 2 or more, it is effective for suppression of a white spot, and this monomer is By mix | blending an ionic compound in the adhesive containing the copolymerized acrylic resin, while providing the inhibitory effect of a white spot, favorable antistatic property can also be provided. The ionic compound referred to herein is a compound that exists in a combination of cations and anions, and the cations and anions may be inorganic or organic, respectively, but at least one of the cation and the anion from the viewpoint of compatibility with the acrylic resin (P) It is preferable that it is an ionic compound containing this organic group.

Examples of the inorganic cation constituting the ionic compound include alkali metal ions such as lithium cation [Li ⁺ ], sodium cation [Na ⁺ ], potassium cation [K ⁺ ] and cesium cation [Cs ⁺ ]; Alkaline earth metal ions such as beryllium cation [Be ²⁺ ], magnesium cation [Mg ²⁺ ], calcium cation [Ca ²⁺ ] and the like. Among them, it is preferable to use lithium cation [Li ⁺ ], potassium cation [K ⁺ ] or sodium cation [Na ⁺ ] from the viewpoint of metal corrosion resistance, and to use potassium cation [K ⁺ ] from the viewpoint of durability. More preferred.

As an example of the organic cation which comprises an ionic compound, the pyridinium-type cation represented by following formula (V), the quaternary ammonium cation represented by following formula (VI), etc. are mentioned.

In formula (V), R <_5> -R <_9> respectively independently represents a hydrogen atom or a C1-C6 alkyl group, and R <_10> represents a C1-C16 alkyl group. In formula (VI), R ₁₁ represents an alkyl group having 1 to 12 carbon atoms, and R ₁₂ , R ₁₃ and R ₁₄ each independently represent an alkyl group having 6 to 12 carbon atoms.

It is preferable from the viewpoint of compatibility with acrylic resin (P) that the pyridinium-based cation represented by said formula (V) has 8 or more, especially 10 or more total carbon numbers. Moreover, it is preferable that the total carbon number is 36 or less, Furthermore, it is 30 or less. Among the pyridinium-based cations represented by the formula (V), R ₇ bonded to a 4-position carbon atom of the pyridine ring is an alkyl group, and R ₅ , R ₆ , R ₈ and R ₉ bonded to other carbon atoms of the pyridine ring are It is one of preferable cations that are each a hydrogen atom.

Specific examples of the pyridinium-based cation represented by formula (V) include N-methyl-4-hexylpyridinium cation, N-butyl-4-methylpyridinium cation and N-butyl-2,4-diethylpyridinium Cation, N-butyl-2-hexylpyridinium cation, N-hexyl-2-butylpyridinium cation, N-hexyl-4-methylpyridinium cation, N-hexyl-4-ethylpyridinium cation, N-hexyl The 4-butylpyridinium cation, the N-octyl-4-methylpyridinium cation, the N-octyl-4-ethylpyridinium cation, the N-octylpyridinium cation, etc. are mentioned.

It is preferable that the ammonium cation represented by said Formula (VI) is 20 or more in total, and also 22 or more from a viewpoint of compatibility with acrylic resin (P). Moreover, it is preferable that the total carbon number is 36 or less, Furthermore, it is 30 or less.

Specific examples of the tetraalkylammonium cation represented by formula (VI) include tetrahexyl ammonium cation, tetraoctyl ammonium cation, tributylmethylammonium cation, trihexylmethylammonium cation, trioctylmethylammonium cation, tridecylmethylammonium cation and tri Hexyl ethyl ammonium cation, a trioctyl ethyl ammonium cation, etc. are mentioned.

On the other hand, examples of the anion constituting the ionic compound include chloride anion [Cl ⁻ ], bromide anion [Br ⁻ ], iodide anion [I ⁻ ], tetrachloroaluminate anion [AlCl ^{4 −} ], heptachlorodialumi anion [Al ₂ Cl ₇ ^-], anion as tetrafluoroborate [BF ₄ ^-], phosphate anion hexafluorophosphate [PF ₆ ^-], perchlorate anion [ClO ₄ ^-], nitrate anions [NO ₃ ^-], acetate Anion [CH ₃ COO ⁻ ], trifluoroacetate anion [CF ₃ COO ⁻ ], methanesulfonate anion [CH ₃ SO ₃ ⁻ ], trifluoromethanesulfonate anion [CF ₃ SO ₃ ⁻ ], bis (tri methanesulfonyl fluorophenyl) imide anion _{[(CF 3 SO 2) 2 N} - ], methanesulfonyl as tris (trifluoromethyl) bumetanide anion _{[(CF 3 SO 2) 3 C} - ], hexafluoro-acetoxy carbonate anion [AsF ₆ ^-], hexafluoro Timothy anion [SbF ₆ ^-], hexafluoro niobate anions [NbF ₆ ^-], tantalum anion hexafluorophosphate [TaF ₆ ^-], (poly) fluoride anion as hydro-fluoro [F (HF) _n ^-] (n is 1 to 3 degrees), thiocyanate anion SCN ^[-], DC [Ana imide anion (CN) ₂ N ^-], perfluoro butane sulfonate anion [C ₄ F ₉ SO ₃ ^-], bis (penta fluoro-ethane sulfonyl) imide anion _{[(C 2 F 5 SO 2)} 2 N - ], perfluoro butanoate anion [C ₃ F ₇ COO ^-], (methanesulfonyl-trifluoromethyl sulfonyl) (trifluoro Romethanecarbonyl) imide anion [(CF ₃ SO ₂ ) (CF ₃ CO) N ⁻ ] and the like.

Specific examples of the ionic compound can be appropriately selected from combinations of the cations and anions described above. Specific ionic compounds which are combinations of cations and anions include lithium bis (trifluoromethanesulfonyl) imide, lithium hexafluorophosphate, lithium iodide (lithium iodide), and lithium bis (pentafluoroethanesulfonyl) Imide, lithium tris (trifluoromethanesulfonyl) methanide, sodium bis (trifluoromethanesulfonyl) imide, sodium bis (pentafluoroethanesulfonyl) imide, sodium tris (trifluoromethanesulphate) Ponyl) methanide, potassium bis (trifluoromethanesulfonyl) imide, potassium bis (pentafluoroethanesulfonyl) imide, potassium tris (trifluoromethanesulfonyl) methide, N-methyl-4- Hexylpyridinium bis (trifluoromethanesulfonyl) imide, N-butyl-2-methylpyridinium bis (trifluoromethanesulfonyl) imide, N-hexyl-4-methylpyridinium bis (trifluoro Romethanesulfonyl) imide, N-octyl-4-methylpyridinium S (trifluoromethanesulfonyl) imide, N-methyl-4-hexylpyridinium hexafluorophosphate, N-butyl-2-methylpyridinium hexafluorophosphate, N-hexyl-4-methylpyridinium Hexafluorophosphate, N-octyl-4-methylpyridinium hexafluorophosphate, N-methyl-4-hexylpyridinium perchlorate, N-butyl-2-methylpyridinium perchlorate, N-hexyl-4-methylpyridine Dinium perchlorate, N-octyl-4-methylpyridinium perchlorate, tetrahexyl ammonium bis (trifluoromethanesulfonyl) imide, tributylmethylammonium bis (trifluoromethanesulfonyl) imide, trihexylmethylammonium bis (Trifluoromethanesulfonyl) imide, trioctylmethylammonium bis (trifluoromethanesulfonyl) imide, tetrahexylammonium hexafluorophosphate, tributylmethylammonium hexafluorophosphate, trihexylmethylammonium hexafluoro Lofo Sulfate, trioctyl there may be mentioned a methyl ammonium hexafluorophosphate, tetrahexylammonium perchlorate, tributyl methyl ammonium perchlorate, tri-methyl-hexyl ammonium perchlorate, trioctyl methyl ammonium perchlorate and the like.

These ionic compounds can be used individually or in combination of 2 or more types, respectively. When it contains an ionic compound, the quantity may be 0.1-10 mass parts with respect to 100 mass parts of acrylic resin (P), for example.

In the present invention, the pressure-sensitive adhesive layer may further contain a crosslinking catalyst, a weather stabilizer, a tackifier, a plasticizer, a softener, a dye, a pigment, an inorganic filler, a resin other than an acrylic resin, and the like. It is also useful to make a harder adhesion layer by mix | blending an ultraviolet curable compound, such as a polyfunctional acrylate, and a photoinitiator with an adhesive, and irradiating and hardening an ultraviolet-ray after formation of an adhesion layer. This serves to implement the second crosslinked structure in the pressure-sensitive adhesive, and to improve durability, such as during the heat test. Moreover, when a crosslinking catalyst is used together with a crosslinking agent for an adhesive, an adhesion layer can be prepared by aging of a short time, and the optical laminated body obtained WHEREIN: Lifting and peeling between an adhesion layer and a 1st hardened | cured material layer, or a 1st protective film. This may occur or foaming may be suppressed in the adhesive layer, and reworkability may be satisfactory.

Examples of the crosslinking catalyst include amine compounds such as hexamethylenediamine, ethylenediamine, polyethyleneimine, hexamethylenetetraamine, diethylenetriamine, triethylenetetraamine, isophoronediamine, trimethylenediamine, polyamino resin and melamine resin, and the like. Can be mentioned. When mix | blending an amine compound as a crosslinking catalyst with an adhesive, an isocyanate type compound is suitable as a crosslinking agent.

Moreover, it can also be set as the adhesion layer which shows light scattering property by containing microparticles | fine-particles. Moreover, antioxidant, a ultraviolet absorber, etc. may be mix | blended with the adhesion layer. Examples of the ultraviolet absorber include salicylic acid ester compounds, benzophenone compounds, benzotriazole compounds, cyanoacrylate compounds, nickel complex salt compounds and the like.

The pressure-sensitive adhesive layer may be formed by, for example, a pressure-sensitive adhesive as described above as an organic solvent solution, applied by a die coater, a gravure coater, or the like on a film or layer (for example, a polarizing film) to be laminated and dried. Can be. Moreover, the sheet-like adhesive formed on the plastic film (it is called a separate film) to which the mold release process was performed can also be formed by the method of transferring to the film or layer to be laminated | stacked. Although there is no restriction | limiting in particular about the thickness of an adhesion layer, It is preferable to exist in the range of 2-40 micrometers, It is more preferable to exist in the range of 5-35 micrometers, It is still more preferable to exist in the range of 10-30 micrometers.

It is preferable that it is 0.10-5.0 MPa, and, as for the adhesion layer, the storage elastic modulus is 23-80 degreeC, and it is more preferable that it is 0.15-1.0 MPa. It is preferable that the storage elastic modulus at 23-80 degreeC is 0.10 Mpa or more, since the white spot by the shrinkage of the optical laminated body when the liquid crystal display panel containing an optical laminated body is exposed to high temperature etc. can be suppressed. Moreover, since it is hard to produce the fall of durability by the fall of adhesive force, it is preferable that it is 5 Mpa or less. Here, "showing the storage modulus of 0.10 to 5.0 MPa in 23-80 degreeC" means that the storage modulus takes the value of the said range in any temperature of this range. Since storage elastic modulus normally decreases with temperature rise, when both the storage elastic modulus in 23 degreeC and 80 degreeC are in the said range, it can be said that an adhesive layer shows the storage elastic modulus of the said range in this range of temperature. In addition, the storage elastic modulus of an adhesion layer can be measured with a commercially available viscoelasticity measuring apparatus, for example, the viscoelasticity measuring apparatus "DYNAMIC ANALYZER RDA II" made by REOMETRIC.

[Conductive Floor]

The conductive layer included in the optical laminate of the present invention may be, for example, a conductive transparent metal oxide layer or a metal wiring layer. Such conductive layers are, for example, at least selected from aluminum, copper, silver, iron, tin, zinc, platinum, nickel, molybdenum, chromium, tungsten, lead, titanium, palladium, indium and alloys containing two or more metals thereof. The layer containing 1 type of metal elements may be sufficient. Of these, the conductive layer may be a layer containing at least one metal element selected from the viewpoint of conductivity, preferably aluminum, copper, silver and gold, and more preferably from the viewpoint of conductivity and cost. The layer containing an element may be sufficient. Moreover, in the case of the layer containing copper, you may perform blackening process from a viewpoint of preventing reflection of light. The blackening treatment is to oxidize the surface of the conductive layer to precipitate Cu ₂ O or CuO. The conductive layer may be a layer containing, for example, ITO (tin doped indium oxide), graphene, zinc oxide, or AZO (aluminum doped zinc oxide).

The conductive layer (conductive layer 4 in FIGS. 1 and 2) is formed on the substrate (substrate X in FIGS. 1 and 2), for example. As a method of forming a conductive layer on a board | substrate, sputtering method etc. are mentioned, for example. The substrate may be a transparent substrate constituting a liquid crystal cell included in the touch input element, or may be a glass substrate. The transparent substrate is formed of, for example, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, polyethylene naphthalate, polyether sulfone, cyclic olefin copolymer, triacetyl cellulose, polyvinyl alcohol, polyimide, polystyrene, biaxially stretched polystyrene, or the like. You may be. The glass substrate may be formed of, for example, soda-lime glass, low alkali glass, alkali free glass, or the like. The conductive layer may be formed on the entire surface of the substrate, or may be formed on a portion thereof.

As an electroconductive transparent metal oxide layer, transparent electrode layers, such as ITO (tin doped indium oxide) and AZO (aluminum doped zinc oxide), are mentioned, for example.

As a metal wiring layer, the layer which added the metal mesh which is a fine metal wiring layer, metal nanoparticle, and metal nanowire in a binder, etc. are mentioned, for example. Here, a metal mesh represents the two-dimensional mesh-like structure formed by the metal wiring. The shape of the opening of the metal mesh (the opening between the wirings or the eyes of the mesh) is not particularly limited, and may be, for example, polygonal (triangular, square, pentagonal, hexagonal, etc.), circular, elliptical, indefinite, and each opening. May be the same or different. In a preferred embodiment, the shapes of the openings of the metal mesh are the same shape, respectively, and are square or rectangular.

In the case where the conductive layer is a metal wiring layer (particularly a metal mesh), for example, the metal wirings may be arranged at predetermined intervals in the longitudinal and horizontal directions of the plane on the substrate X. At this time, the opening may be filled with a resin (adhesive or the like) or a metal wiring layer may be embedded in the resin (adhesive or the like). In the case of using a resin or the like, the conductive layer (conductive layer 4) is composed of both metal wiring and resin (adhesive).

The line width of the metal wiring (especially metal mesh) is usually 10 μm or less, preferably 5 μm or less, more preferably 3 μm or less, and usually 0.1 μm or more, preferably 0.5 μm or more, and more preferably 1 μm or more. to be. The line width of the metal wiring layer may be a combination of these upper and lower limits, preferably 0.5 to 5 µm, and more preferably 1 to 3 µm.

The thickness of the conductive layer (the conductive transparent metal oxide layer or the metal wiring layer) is not particularly limited, but is usually 10 μm or less, preferably 3 μm or less, more preferably 1 μm or less, particularly preferably 0.5 μm or less. It is 0.01 micrometer or more normally, Preferably it is 0.05 micrometer or more, More preferably, it is 0.1 micrometer or more. The thickness of the conductive layer may be a combination of these upper and lower limits, preferably 0.01 to 3 µm, more preferably 0.05 to 1 µm. In addition, when a conductive layer is a metal wiring layer and a metal wiring layer is comprised by both resin (adhesive etc.) and metal wiring, the thickness of a conductive layer is the thickness containing resin.

The method for preparing the conductive layer is not particularly limited, and may be lamination of metal foil, or may be formed by vacuum deposition, sputtering, wet coating, ion plating, inkjet printing, gravure printing, electrolytic plating, or electroless plating. It is preferably a conductive layer formed by a sputtering method, an inkjet printing method or a gravure printing method, and more preferably a conductive layer formed by sputtering.

The conductive layer (for example, a metal mesh) may have a function of generating a signal when the transparent substrate is touched, for example, and transmitting touch coordinates to an integrated circuit or the like.

The optical laminated body of this invention joins (or laminates) the laminated body by which the said 1st hardened | cured material layer and the said adhesion layer were laminated | stacked in this order to one surface of the said polarizing film to the conductive layer formed on the board | substrate, You can get it.

Although the optical laminated body provided with a conductive layer (for example, an electroconductive transparent metal oxide layer, a metal wiring layer, etc.) is useful because it can be used for a touch input type liquid crystal display device etc. which have a touch panel function, it is useful in the dichroism contained in a polarizing film. A pigment | dye (iodine) moves to a conductive layer, and a conductive layer tends to corrode. In particular, when a metal wiring layer such as a metal mesh is used, the conductive layer is more easily corroded because the line width is narrow. However, since the optical laminated body of this invention is equipped with the 1st hardened | cured material layer, the movement of a dichroic dye to the conductive layer can be suppressed effectively, and corrosion of a conductive layer can be prevented effectively.

[Polarizing film]

The polarizing film which comprises the optical laminated body of this invention is a film which has a function which takes out linearly polarized light from the incident natural light, and in this invention, a polyvinyl alcohol-type resin film is made to contain a dichroic dye, preferably iodine. It is the film which carried out the adsorption orientation. As polyvinyl alcohol-type resin which comprises a polyvinyl alcohol-type resin film, what saponified polyvinyl acetate type resin can be used. As polyvinyl acetate type resin, the copolymer (for example, ethylene-vinyl acetate copolymer etc.) of vinyl acetate and the other monomer copolymerizable with this besides the polyvinyl acetate which is a homopolymer of vinyl acetate is mentioned. As another monomer copolymerizable with vinyl acetate, unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, acrylamide which has an ammonium group, etc. are mentioned, for example.

Saponification degree of polyvinyl alcohol-type resin is 85-100 mol% normally, and 98 mol% or more is preferable. The polyvinyl alcohol-based resin may be modified. For example, polyvinyl formal, polyvinyl acetal, polyvinyl butyral and the like modified with aldehydes can be used. The polymerization degree of polyvinyl alcohol-type resin is 1000-10000 normally, and 1500-5000 are preferable.

The film which formed such polyvinyl alcohol-type resin into a film can be used as a raw film of a polarizing film. The method of forming a polyvinyl alcohol-type resin into a film is not specifically limited, It can form into a film by a conventionally well-known method. Although the film thickness of the raw film which consists of polyvinyl alcohol-type resin is not specifically limited, Considering easiness of extending | stretching, it is 10-150 micrometers, Preferably it is 15-100 micrometers, More preferably, it is 20-80 micrometers to be.

The polarizing film is usually a step of uniaxially stretching such a polyvinyl alcohol-based resin film, a step of adsorbing the dichroic dye by dyeing the polyvinyl alcohol-based resin film with a dichroic dye, and a polyvinyl alcohol-based resin on which the dichroic dye is adsorbed. It manufactures through the process of processing a film with aqueous solution of boric acid, and the process of washing with water after the process by aqueous solution of boric acid.

Uniaxial stretching of a polyvinyl alcohol-type resin film may be performed before dyeing a dichroic dye, may be performed simultaneously with dyeing, or may be performed after dyeing. When performing uniaxial stretching after dyeing, this uniaxial stretching may be performed before boric acid treatment, and may be performed during boric acid treatment. It is also possible to uniaxially stretch in these several steps. In uniaxial stretching, you may extend uniaxially between the rolls from which a circumferential speed differs, and may extend uniaxially using a thermal roll. In addition, uniaxial stretching may be dry stretching which extends | stretches in air | atmosphere, and wet extending | stretching may be performed in the state which swelled the polyvinyl alcohol-type resin film using a solvent. The draw ratio is preferably 8 times or less, more preferably 7.5 times or less, still more preferably 7 times or less from the viewpoint of suppressing deformation of the polarizing film. Moreover, it is preferable that a draw ratio is 4.5 times or more from a viewpoint of expressing a function as a polarizing film.

In this invention, the method of immersing and dyeing a polyvinyl alcohol-type resin film in the aqueous solution containing iodine and potassium iodide is employ | adopted normally. Content of iodine in the said aqueous solution is 0.01-1 mass part normally per 100 mass parts of water, and content of potassium iodide is 0.5-20 mass parts normally per 100 mass parts of water. The temperature of the aqueous solution used for dyeing is usually 20 to 40 ° C, and the immersion time (dyeing time) in the aqueous solution is usually 20 to 1800 seconds.

Boric acid treatment after dyeing with iodine can be performed by immersing the dyed polyvinyl alcohol-type resin film in boric acid containing aqueous solution. The amount of boric acid in boric-acid containing aqueous solution is 2-15 mass parts normally per 100 mass parts of water, Preferably it is 5-12 mass parts. In this invention, it is preferable that this boric-acid containing aqueous solution contains potassium iodide. The amount of potassium iodide in boric-acid containing aqueous solution is 0.1-15 mass parts normally per 100 mass parts of water, Preferably it is 5-12 mass parts. Immersion time in boric-acid containing aqueous solution is 60-1200 second normally, Preferably it is 150-600 second, More preferably, it is 200-400 second. The temperature of the boric acid containing aqueous solution is 50 degreeC or more normally, Preferably it is 50-85 degreeC, More preferably, it is 60-80 degreeC.

The polyvinyl alcohol-based resin film after boric acid treatment is usually washed with water. A water washing process can be performed by immersing the polyvinyl alcohol-type resin film processed by boric acid in water, for example. The temperature of the water in a water washing process is 5-40 degreeC normally, and immersion time is 1-120 second normally. After water washing, a drying process is performed and a polarizing film can be obtained. A drying process can be performed using a hot air dryer or a far infrared heater. The temperature of a drying process is 30-100 degreeC normally, Preferably it is 40-95 degreeC, More preferably, it is 50-90 degreeC. The time of the drying treatment is usually 60 to 600 seconds, preferably 120 to 600 seconds.

In this manner, the polyvinyl alcohol-based resin film is subjected to uniaxial stretching, dichroic dye, preferably iodine dyeing and boric acid treatment to obtain a polarizing film. The thickness of a polarizing film can be 5-40 micrometers, for example.

[2nd hardened | cured material layer]

The optical laminated body of this invention may be equipped with the 2nd hardened | cured material layer comprised from the hardened | cured material of a curable composition on the surface on the opposite side to the said 1st hardened | cured material layer of a polarizing film. The curable composition which comprises a 2nd hardened | cured material layer can be suitably selected according to adhesiveness with a polarizing film or a 2nd protective film, The composition contained in the range of the curable composition which comprises the 1st hardened | cured material layer mentioned above may be sufficient. Or a photocurable adhesive known in the art. When using the composition contained in the range of the curable composition which comprises the above-mentioned 1st hardened | cured material layer, the curable composition of the same composition as the curable composition of the 1st hardened | cured material layer which comprises an optical laminated body is used for a 2nd hardened | cured material layer. You may use it and you may use the curable composition of a different composition for a 2nd hardened | cured material layer.

Examples of the photocurable adhesive known in the art include a mixture of a photocurable epoxy resin and a photocationic polymerization initiator and a mixture of a photocurable acrylic resin and a photoradical polymerization initiator. As a curable composition which forms the hardened | cured material which comprises a 2nd hardened | cured material layer, the photocurable adhesive agent containing a photocurable component and a photocationic polymerization initiator as described in international publication 2014/129368 can be used, for example.

A 2nd hardened | cured material layer can be formed by apply | coating and hardening | curing the curable composition which comprises a 2nd hardened | cured material layer by the well-known method on the surface opposite to the surface where the 1st hardened | cured material layer of the optical laminated body was laminated | stacked. Can be. As a coating method of the curable composition which comprises a 2nd hardened | cured material layer, the coating method of the same formula as the coating of the curable composition 1 is mentioned, for example.

As a curable composition which comprises a 2nd hardened | cured material layer, when using a photocurable composition or a known photocurable adhesive agent, a curable composition or curable adhesive agent is hardened by irradiating an active energy ray. The light source of the active energy ray is not particularly limited, but an active energy ray having a luminescence distribution at a wavelength of 400 nm or less is preferable, and specifically, a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a chemical lamp, a black light lamp, a microwave excitation Mercury lamps, metal halide lamps and the like are preferred.

The light irradiation intensity to the curable composition which comprises a 2nd hardened | cured material layer can be suitably selected according to the composition of this curable composition, Although it does not specifically limit, The irradiation intensity of the wavelength range effective for activation of a polymerization initiator is preferably Is 0.1-1000 mW / cm 2. What is necessary is just to select the light irradiation time to the curable composition which comprises a 2nd hardened | cured material layer suitably according to the curable composition to harden, and the accumulated light quantity represented as a product of the said irradiation intensity and irradiation time becomes like this. Preferably it is 10-5000 mJ / cm 2 is set.

Moreover, when hardening a curable composition by irradiation of an active energy ray, all functions of an optical laminated body, such as the polarization degree, a transmittance | permeability and a color of a polarizing film, and the transparency of the various films which comprise a protective film and an optical layer, fall, for example. It is preferable to harden on the conditions which do not. Although the thickness of a 2nd hardened | cured material layer is not specifically limited, Usually, it is 0.1-10 micrometers.

[Protective film]

In one embodiment, the optical laminated body of this invention has the 1st protective film (7 shown in FIG. 2) laminated | stacked through the 1st hardened | cured material layer on one surface of the said polarizing film. Furthermore, in one embodiment, the optical laminated body of this invention is the agent laminated | stacked on the other surface (surface opposite to the 1st hardened | cured material layer 2) of the said polarizing film via the 2nd hardened | cured material layer. 2 protective film (6 shown in FIG. 1 and FIG. 2). From an viewpoint of contributing to preventing shrinkage and expansion of the polarizing film, and preventing deterioration of the polarizing film due to temperature, humidity, ultraviolet light, and the like, in one embodiment, the optical laminate of the present invention has the first protective film. On the other hand, from an aspect of thinning an optical laminated body, in one Embodiment, the optical laminated body of this invention does not contain the said 1st protective film. Since the 1st hardened | cured material layer in this invention contributes also to the prevention of deterioration of a polarizing film instead of a protective film, the optical laminated body of this invention is from a viewpoint of achieving the deterioration prevention of a polarizing film and thinning of an optical laminated body in a balanced manner. It is preferable not to include a 1st protective film.

As a material which forms a protective film, what is excellent in transparency, mechanical strength, thermal stability, moisture shielding, isotropy, etc. is preferable. For example, polyester-based polymers, such as polyethylene terephthalate and polyethylene naphthalate; Cellulose polymers such as diacetyl cellulose and triacetyl cellulose; Acrylic polymers such as polymethyl methacrylate; Styrene polymers such as polystyrene and acrylonitrile styrene copolymer (AS resin); And polycarbonate polymers. In addition, polyolefin having a polyethylene, polypropylene, cyclo-based or norbornene structure; Polyolefin-based polymers such as ethylene-propylene copolymers; Amide polymers such as vinyl chloride polymers and nylons and aromatic polyamides; Imide type polymer, sulfone type polymer, polyether sulfone type polymer, polyether ether ketone type polymer, polyphenylene sulfide type polymer, vinyl alcohol type polymer, vinylidene chloride type polymer, vinyl butyral type polymer, arylate type polymer, poly An oxymethylene type polymer, an epoxy type polymer, the blend of the said polymer, etc. are mentioned as an example of the polymer which forms a protective film. A protective film can also be formed as hardened | cured material layer by resin of thermosetting type | mold or ultraviolet curable types, such as an acryl type, urethane type, an acryl urethane type, an epoxy type, and a silicone type. Especially, what has a hydroxyl group which has reactivity with an isocyanate crosslinking agent is preferable, and a cellulose polymer is especially preferable.

In the optical laminated body of this invention, the 1st protective film and the 2nd protective film may be comprised from the same material, and may be comprised from the other material.

The water vapor transmission rate of the second protective film is preferably at most 1200 g / (m 2 · 24 hours) at a temperature of 23 ° C. and a relative humidity of 55%, more preferably at most 800 g / (m 2 · 24 hours), More preferably, it is 600 g / (m <2> * 24 hours) or less, Especially preferably, it is 400 g / (m <2> * 24 hours) or less, Most preferably, it is 200 g / (m <2> * 24 hours) or less. Since the moisture permeability of a 2nd protective film is below the said value, it can prevent the invasion of the moisture from the exterior under high temperature, high humidity, and can prevent the movement of the dichroic dye (iodine) contained in a polarizing film to be accelerated, Corrosion and deterioration of optical properties can be prevented more effectively. On the other hand, since the optical laminated body of this invention has a 1st hardened | cured material layer, even if a 2nd protective film does not satisfy | fill the said water vapor transmission rate, the movement of the dichroic dye (iodine) contained in a polarizing film is suppressed, Deterioration and deterioration of optical properties can be prevented.

Although the thickness of a protective film is not restrict | limited in particular, Both a 1st protective film and a 2nd protective film are 5-500 micrometers normally, Preferably it is 1-300 micrometers, More preferably, it is 5-200 micrometers, More preferably, 10-100 micrometers. In addition, the protective film may be comprised with the protective film etc. which added the optical compensation function.

In the optical laminated body of this invention, since a 1st hardened | cured material layer can effectively suppress the movement of the dichroic dye from a polarizing film to an adhesion layer, and the movement of an ionic compound from an adhesion layer to a polarizing film, optical lamination The selection range regarding the material of the 1st protective film which comprises a sieve becomes wider. That is, it is not necessary to use the protective film which is hard to permeate an ionic compound, and it becomes possible to comprise an optical laminated body using the protective film of a generally cheap structure which is easy to permeate an ionic compound. Thereby, the optical laminated body of this invention is advantageous also from an industrial viewpoint, such that production cost can be made low.

In the optical laminated body of this invention shown to FIG. 1 and FIG. 2, although the 1st hardened | cured material layer is laminated directly on a polarizing film, between a polarizing film and a 1st hardened | cured material layer, or a 1st hardened | cured material layer and an adhesive layer The primer layer may be provided in between. As a material which forms a primer layer, various polymers, such as a urethane oligomer, a sol of a metal oxide, a silica sol, etc. are mentioned, for example. The primer layer is thinner than the protective film, for example, 0.01 to 3 m, preferably 0.1 to 2 m, and more preferably 0.5 to 1 m.

Moreover, the optical laminated body of this invention may be equipped with the protective film between an polarizing film and a 1st hardened | cured material layer through an adhesive bond layer. As a protective film, the protective film like the 1st protective film or 2nd protective film which were illustrated above, for example is mentioned. The thickness of a protective film is also 5-500 micrometers normally like a 1st protective film or a 2nd protective film.

Even if the optical laminated body of this invention is not equipped with the protective film between a polarizing film and a 1st hardened | cured material layer, a 1st hardened | cured material layer can prevent the movement of a dichroic dye effectively. For this reason, the optical laminated body of this invention is an aspect in which the 1st hardened | cured material layer is laminated | stacked directly on a polarizing film, or the aspect in which the 1st hardened | cured material layer is laminated | stacked on a polarizing film via a primer layer, or a 1st hardened | cured material The aspect in which the adhesive layer is laminated | stacked through the primer layer to a layer is preferable.

In the optical laminated body of this invention, optical layers, such as a retardation film, a visual compensation film, and a brightness improving film, may be laminated | stacked further as needed. In the optical laminated body of this invention, an optical layer can be formed using the material already known in the said field | area.

The optical laminated body of this invention can be manufactured by a well-known method. For example, a curable composition is apply | coated to a 2nd protective film, a 2nd cured composition layer is formed, a polarizing film is bonded to the said 2nd cured composition layer, and a laminated body is produced. In the case of the optical laminated body which does not contain a 1st protective film, the curable composition 1 is apply | coated on a peelable film, a 1st cured composition layer is formed, and the polarizing film side of the said laminated body is bonded to the coating surface. . Next, active energy rays such as ultraviolet rays and electron beams are irradiated to cure the second cured composition layer and the first cured composition layer to form the second cured product layer and the first cured product layer. Then, a peelable film is peeled off and an adhesion layer is formed on a 1st hardened | cured material layer. Then, for example, the pressure-sensitive adhesive layer may be bonded to the conductive layer laminated on the substrate. On the other hand, in the case of the optical laminated body containing a 1st protective film, the curable composition 1 is apply | coated on a protective film, the 1st cured composition layer is formed, and the polarizing film side of the said laminated body was bonded to the coating surface. Thereafter, active energy rays such as ultraviolet rays and electron beams are irradiated to cure the first cured composition layer to form a first cured product layer, and then an adhesive layer is formed on the first protective film. Then, for example, the pressure-sensitive adhesive layer may be bonded to the conductive layer laminated on the substrate.

A laminated body can be formed using a separate film (peeling film) as mentioned above from the viewpoint of reducing thickness nonuniformity at the time of coating curable composition, and making thinning of an optical laminated body compatible. For example, the laminated body which consists of a polarizing film and a 1st hardened | cured material layer laminated | stacks a separate film (peeling film) on one surface of a polarizing film via a 1st hardened | cured material layer, and a 1st hardened | cured material by an active energy ray etc. After hardening a layer, it can form by peeling a separate film (peeling film).

The present invention is composed of a cured product of a curable composition containing a polymerizable compound on one surface of a polarizing film containing a dichroic dye in an optical laminate having the above-described configuration, that is, a polyvinyl alcohol-based resin. As an optical laminated body (optical laminated body shown by FIG. 1 and FIG. 2 in 1 embodiment) in which 1 hardened | cured material layer, the adhesion layer, and the conductive layer were laminated | stacked in this order, the said polymeric compound is two or more oxetas The oxetane compound which has a nil group is included, and content of this oxetane compound contains the optical laminated body which is 40 mass parts or more with respect to 100 mass parts of total amounts of all the polymeric compounds contained in a curable composition. When the oxetane compound having two or more oxetanyl groups is included in a predetermined amount or more, the first cured product layer having a high crosslinking density and a dense hardened material layer can be formed, so that the first diameter of the dichroic dye (iodine) contained in the polarizing film Movement to a cargo layer can be suppressed effectively, and it becomes possible to prevent the corrosion of the conductive layer by the dichroic dye (iodine), and the fall of optical performance effectively. In addition, about such an optical laminated body, the absorbance increase rate of a 1st hardened | cured material layer may not be 30% or less. In a preferred embodiment, the oxetane compound having two or more oxetanyl groups is the above-described oxetane compound (A), and is contained in a curable composition that forms a cured product of the first cured product layer. It also includes)). Moreover, the polarizing film, the adhesion layer, and the conductive layer contained in an optical laminated body are also the same as that mentioned above.

In this invention, the 1st hardened | cured material layer, the adhesion layer, and the conductive layer which consist of hardened | cured material of the curable composition containing a polymeric compound on one surface of the polarizing film containing a dichroic dye in polyvinyl alcohol-type resin. The optical laminated body laminated | stacked in this order WHEREIN: The optical laminated body whose water contact angle of a 1st hardened | cured material layer is 90 degrees or more has the remarkable movement of a dichroic dye (iodine) due to the outstanding hydrophobicity of a 1st hardened | cured material layer. Even under the high temperature and high humidity environment, the movement of the dichroic dye can be effectively suppressed, and the corrosion of the conductive layer and the deterioration of the optical performance can be effectively prevented.

In this invention, the water contact angle of a 1st hardened | cured material layer is 90 degrees or more, for example, Preferably it is 95 degrees or more, More preferably, it is 100 degrees or more. When water contact angle is more than the said value, even if it is high temperature, high humidity, the movement of a dichroic dye to a 1st hardened | cured material layer can be suppressed effectively, and corrosion of a conductive layer and fall of optical performance can be prevented effectively.

In this invention, the 1st hardened | cured material layer, the adhesion layer, and the conductive layer which consist of hardened | cured material of the curable composition containing a polymeric compound on one surface of the polarizing film containing a dichroic dye in polyvinyl alcohol-type resin. As an optical laminated body laminated | stacked in this order, the optical laminated body whose storage elastic modulus at 1 degreeC of 30 degreeC of a 1st hardened | cured material layer is 1500 Mpa or more is due to comparatively high crosslinking density, and with respect to a dichroic dye (iodine) The barrier property is high, and the corrosion of a conductive layer and the fall of optical performance can be prevented effectively by suppressing the movement of a dichroic dye (iodine) to a 1st hardened | cured material layer effectively.

The storage modulus at 30 ° C. of the first cured product layer is, for example, 1500 to 3500 MPa, preferably 1800 to 3500 MPa, more preferably 2000 to 3500 MPa, still more preferably 2500 to 3500 MPa. If elasticity modulus is more than the said lower limit, it can suppress more effectively the movement of a dichroic dye (iodine) to a 1st hardened | cured material layer, and the corrosion of a conductive layer and the fall of optical performance can be prevented more effectively.

In this invention, the 1st hardened | cured material layer and adhesion layer which consist of hardened | cured material of the curable composition (1) containing a polymeric compound on one surface of the polarizing film containing a dichroic dye in polyvinyl alcohol-type resin. And an optical layer in which the conductive layer is laminated in this order. The optical laminate having a glass transition temperature of 90 ° C. or higher in the first cured product layer is a barrier against dichroic dyes (iodine) due to the relatively high crosslinking density. The property is high, the movement of the dichroic dye (iodine) to the first cured product layer can be effectively suppressed, and the corrosion of the conductive layer and the deterioration of optical performance can be effectively prevented.

The glass transition temperature of a 1st hardened | cured material layer is 90-180 degreeC, Preferably it is 100-180 degreeC, More preferably, it is 120-180 degreeC, More preferably, it is 150-180 degreeC. If elasticity modulus is more than the said lower limit, the movement of a dichroic dye (iodine) to a 1st hardened | cured material layer can be suppressed more effectively, and corrosion of a conductive layer and fall of an optical performance can be prevented more effectively.

Example

EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited at all by these Examples. In addition, unless otherwise indicated, "%" and "part" in an Example and a comparative example respectively represent "mass%" and a "mass part."

Example 1

1. Preparation of curable composition (I) which comprises a 1st hardened | cured material layer

Each component was mixed according to the composition of the following Table 1, and the curable composition (I) of manufacture example 1-manufacture example 31 was prepared.

2. Evaluation of absorbance increase rate of the first cured product layer (iodine ion absorbency evaluation)

On one side of a 50-micrometer-thick cycloolefin-based film (trade name "ZEONOR", manufactured by Nippon Xeon Co., Ltd.), the film thickness after curing of the curable composition (I) of Production Example 1 using a bar coater was about 30 μm. Coated to be. A 50-micrometer-thick cycloolefin-type film (brand name "ZEONOR", Nippon Xeon Co., Ltd. product) was bonded to the coating surface, and the laminated body was produced. On the cycloolefin-based film side of the laminate, a cumulative light amount of 280 nm to 320 nm is 1000 mJ / cm 2 using an ultraviolet irradiation device (the lamp uses "D bulb" manufactured by Fusion UV Systems Co., Ltd.) with a belt conveyor. The ultraviolet-ray was irradiated to harden, and hardened | cured curable composition (I), and the laminated body which laminated | stacked the cycloolefin type film on both sides of the 1st hardened | cured material layer was obtained. The cycloolefin type films of both sides of the obtained laminated body were peeled off, the hardened | cured material (1st hardened | cured material layer) of curable composition (I) was isolated, and it was set as the sample for evaluation.

The absorbance at 360 nm was measured for the evaluation sample using the ultraviolet-visible spectrophotometer (The Shimadzu Corporation make, "UV2450"). This absorbance is taken as the absorbance before immersion.

Subsequently, the sample for evaluation was immersed in 50% potassium iodide aqueous solution for 100 hours in the atmosphere of the temperature of 23 degreeC, and 60% of a relative humidity. After taking out the sample for evaluation and wiping the surface with pure water, the absorbance in 360 nm was measured using the ultraviolet-visible spectrophotometer (The Shimadzu Corporation make, "UV2450"). This absorbance is referred to as absorbance after immersion.

Using the obtained absorbance, the absorbance increase rate (%) represented by the following formula was computed. The results are shown in Table 1. Moreover, the absorbance increase rate of each hardened layer formed from the curable composition (I) of manufacture examples 2-31 was calculated | required in the same way. The results are shown in Table 1.

% Absorbance ascent = (absorbance after immersion (360 nm)-absorbance before immersion (360 nm)) / absorbance before immersion (360 nm) × 100 (1)

Each component in Table 1 is shown below.

<Alicyclic epoxy compound (B2)>

B2-1: 3, 4- epoxycyclohexyl methyl 3, 4- epoxy cyclohexane carboxylate ("Celoxide 2021P" (brand name), manufactured by Daicel Kagaku Co., Ltd.)

B2-2: 1,2-epoxy-4- (2-oxyranyl) cyclohexane adduct of 2,2-bis (hydroxymethyl) -1-butanol ("EHPE3150" (brand name), Daicel Kagaku Co., Ltd.) ) Produce)

<Aliphatic epoxy compound (B1)>

B1-1: 1,4-butanediol diglycidyl ether ("EX-214" (brand name), manufactured by Nagase ChemteX Co., Ltd.)

B1-2: cyclohexane dimethanol diglycidyl ether ("EX-216" (brand name), manufactured by Nagase ChemteX Co., Ltd.)

B1-3: cyclohexane dimethanol diglycidyl ether ("EX-411" (brand name), Nagase ChemteX Co., Ltd. make)

<Aromatic Epoxy Compound (B3)>

B3-1: Resorcinol diglycidyl ether (`` EX-201 '' (trade name), manufactured by Nagase ChemteX Co., Ltd.)

B3-2: Bis-A type epoxy resin ("jER828EL" (brand name), Mitsubishi Chemical Co., Ltd. make)

B3-3: 2- [4- (2,3-epoxypropoxy) phenyl] -2- [4- [1,1-bis [4-([2,3-epoxypropoxy] phenyl] ethyl] phenyl Propane (`` TECHMORE VG3101L '' (brand name), Purintech Co., Ltd.)

<Oxetane compound (A)>

A1-1: bis (3-ethyl-3- oxetanylmethyl) ether ("OXT-221" (brand name), product made by Toagosei Co., Ltd.)

A1-2: xylene bis oxetane (`` OXT-121 '' (brand name), manufactured by Toagosei Co., Ltd.)

<Oxetane compound (a)>

a1-1: 2-ethylhexyl oxetane (a compound which has "OXT-212" (brand name), the product made by Toagosei Co., Ltd., one oxetanyl group)

a1-2: 3-ethyl-3-hydroxymethyl oxetane (a compound which has "OXT-101" (brand name), the product made by Toagosei Co., Ltd., one oxetanyl group)

<Acrylic compound>

P1-1: Tricyclodecane dimethanol diacrylate ("A-DCP" (brand name), the Shinnakamura Kagaku Corporation make)

P1-2: Diacrylate of an acetal compound of hydroxypivalaldehyde and trimethylolpropane ("A-DOG" (trade name), manufactured by Shinnakamura Kagaku Co., Ltd.)

<Polymerization initiator>

G1-1: Photocationic polymerization initiator: 50 solution of propylene carbonate of triarylsulfonium hexafluorophosphate ("CPI-100P" (brand name), manufactured by San Apro Co., Ltd.)

G1-2: radical photopolymerization initiator: 2-hydroxy-2-methyl-1-phenyl-propan-1-one ("Tarocure 1173" (brand name), BASF Japan Corporation make)

<Leveling agent>

S1-1: Silicone Leveling Agent (`` SH710 '' (trade name), manufactured by Toray Dou Corning Co., Ltd.)

3. Fabrication of Polarizing Film

Polyvinyl alcohol film of 20 micrometers in thickness (manufactured by Kuraray Co., Ltd., "Kurarefobal KL318" (brand name): carboxyl group-modified polyvinyl alcohol, average polymerization degree of about 2,400, saponification degree 99.9 mol% or more) by dry stretching After uniaxially stretching about 5 times and immersing in pure water at 60 degreeC for 1 minute, maintaining tension state, it immersed at 28 degreeC for 60 second in the aqueous solution whose mass ratio of iodine / potassium iodide / water is 0.05 / 5/100. Then, it was immersed at 72 degreeC for 300 second in the aqueous solution whose mass ratio of potassium iodide / boric acid / water is 8.5 / 8.5 / 100. Furthermore, after wash | cleaning for 20 second with the pure water of 26 degreeC, and drying at 65 degreeC, the polarizing film (1) with a thickness of 7 micrometers in which iodine was adsorbed-oriented on the polyvinyl alcohol film was obtained.

4. Preparation of Aqueous Adhesive

100 parts by mass of pure water, polyvinyl alcohol film (manufactured by Kuraray Co., Ltd., `` Kurarefobal KL318 '' (brand name): 3.0 parts by mass of a carboxyl group-modified polyvinyl alcohol) and a water-soluble polyamide epoxy resin (manufactured by Sumika Chemtech Co., Ltd.) 1.5 mass parts of "Sumirez resin 650" (brand name), the working liquid of solid content concentration 30%) were mixed, and the aqueous adhesive 1 was prepared. Here, the mass part of "Sumirez resin 650" has shown the mass of solid content.

5. Fabrication of Laminate 1

The triacetyl cellulose film (the 톳 plate TOMOEGAWA optical film make, "25KCHC-TC" (brand name), thickness) which apply | coated the water-based adhesive agent 1 to one surface of the polarizing film 1, and the surface was hard-coated. After the saponification process was carried out to 32 µm), the surface not subjected to the hard coat treatment was bonded to the polarizing film through the water-based adhesive 1. This was dried for 6 minutes at 60 degreeC, and the laminated body 1 which has a protective film on one side was produced.

6. Fabrication of Laminates (2)

The curable composition (I) was coated on one side of a 50-micrometer-thick cycloolefin-based film (trade name "ZEONOR", manufactured by Nippon Xeon Co., Ltd.) such that the film thickness after curing was about 3 μm using a bar coater. . The polarizing film side of the laminated body 1 was bonded to the coating surface, and the laminated body was produced. On the cycloolefin-based film side of the laminate, a cumulative light amount of 280 nm to 320 nm is 200 mJ / cm 2 using an ultraviolet irradiation device (the lamp uses "D bulb" manufactured by Fusion UV Systems Co., Ltd.) with a belt conveyor. The ultraviolet-ray was irradiated so that the curable composition (I) might be hardened, and the cycloolefin type film was peeled after that. The laminated body 2 which consists of hardened | cured material (1st hardened | cured material layer) of a protective film / water based adhesive / polarizer film / curable composition (I) was produced.

7. Fabrication of Laminate (3)

Polyethylene terephthalate film [Lintech Co., Ltd. product, "SP-PLR382050" (brand name), peeling of 38 micrometers in thickness which release-processed the organic solvent solution of acrylic adhesive and prepared this organic solvent solution of acrylic adhesive It is called a film], it coated by the die coater so that thickness after drying might be set to 20 micrometers, and it dried, and produced the sheet-like adhesive with a peeling film. Subsequently, after laminating the surface (adhesive surface) opposite to the peeling film of the obtained sheet-like adhesive to the 1st hardened | cured material layer side of the laminated body 2 with a laminator, on condition of temperature 23 degreeC and relative humidity 65%. It cured for 7 days and obtained the laminated body 3 which provided the adhesive layer. This laminate has a structure in which a release film is bonded onto an adhesive layer.

As an acrylic adhesive, the following are contained.

<Base polymer>

Copolymers of butyl acrylate, methyl acrylate, acrylic acid and hydroxyethyl acrylate

<Isocyanate type crosslinking agent>

Ethyl acetate solution (solid content concentration 75%) of the trimethylolpropane adduct of tolylene diisocyanate ("Colonate L" (brand name), manufactured by Tosoh Corporation)

<Silane coupling agent>

3-glycidoxypropyltrimethoxysilane, liquid ("KBM-403" (brand name), Shin-Etsukagaku Kogyo Co., Ltd. product)

<Antistatic agent>

1-hexylpyridinium hexafluorophosphate and a compound represented by following formula (III).

8. ITO Corrosion Evaluation

The ITO film | membrane was formed in one surface of the alkali free glass by the sputtering method, and the glass which has an ITO film | membrane was produced. The glass having this ITO thin film was cut into 25 mm x 25 mm, and the center portion on the ITO thin film was measured by using a low resistivity meter ("Lorresta AX MCP-T370", manufactured by Mitsubishi Chemical Co., Ltd.). Initial resistance ". Subsequently, the laminated body 3 was cut into 15 mm x 15 mm, and the adhesive layer of the laminated body 3 was bonded together so that an ITO thin film might contact, and then it was temperature 50 degreeC and the pressure of 5 kg / cm <2> (490.3 kPa). The autoclave process was performed for 1 hour, and it was left to stand for 24 hours in the environment of the temperature of 23 degreeC, and 55% of a relative humidity. This was made into the sample for evaluation. Then, this sample for evaluation was taken out after putting into an environment of 80 degreeC and 90% of a relative humidity for 72 hours, and it took out and the laminated body 3 was peeled off. Subsequently, the ITO thin film was wash | cleaned with tanol, and what was measured using the apparatus similar to the above was made into "after-durability value." From the "initial resistance value" and "after-durability resistance value" measured as mentioned above, ITO resistance value increase rate was computed by the following formula, and ITO corrosion property was evaluated by the following evaluation criteria. The results are shown in Table 2. The number in Table 2 shows the value of the rate of rise in a following formula.

Resistance increase rate (%) = (resistance-initial resistance after durability) / initial resistance * 100

◎: resistance increase rate is less than 20%

○: resistance increase rate is more than 20% and less than 30%

×: resistance increase rate is 30% or more

9. Evaluation of Durability of Laminates

After the laminated body 3 was cut out to the size of 30 mm x 30 mm, and the peeling film was peeled off, the adhesive layer side of the laminated body 3 was bonded to the alkali free glass [The Corning company make, "EAGLEXG"]. The sample was subjected to autoclave treatment at a temperature of 50 ° C. and a pressure of 5 kg / cm 2 (490.3 kPa) for 1 hour, and then left for 24 hours under an environment of a temperature of 23 ° C. and a relative humidity of 55%. Subsequently, "polarizing film holder with polarizing film" of an optional accessory was set to an ultraviolet visible spectrophotometer (manufactured by Shimadzu Corporation, "UV2450"), and the transmission axis of the laminate in the wavelength range of 380 to 700 nm. Direction and absorption axis directions were measured, and the polarization degree Py (unit:%) was calculated | required based on these. This polarization degree was made into initial stage Py. In addition, the polarization degree after standing for 24 hours in 80 degreeC environment of 90% of relative humidity was measured, and this polarization degree was made into Py after a test. Based on these, the polarization degree change (DELTA) Py was computed by the following formula. The results are shown in Table 1.

ΔPy = Py-initial Py after test

[Examples 2 to 22 and Comparative Examples 1 to 9]

Using the curable composition (I) of manufacture examples 2-31, it carried out similarly to Example 1, and obtained the 1st hardened | cured material layer and the laminated body (3). Using the obtained laminated body 3, the ITO resistance value increase rate and polarization degree change (DELTA) Py were computed by the method similar to Example 1. These results are shown in Table 2.

As shown in Table 2, Examples 1-22 show that the optical laminated body whose absorbance increase rate of a 1st hardened | cured material layer is 30% or less can suppress the corrosion of ITO effectively even if it lays for a long time under high temperature, high humidity. In particular, Examples 4-20 and Example 22 show that the optical laminated body whose absorbance increase rate of a 1st hardened | cured material layer is 20% or less can suppress corrosion of ITO more effectively. Further, Examples 1 to 22 show that an optical laminate having an absorbance increase rate of 30% or less is excellent in durability and can maintain optical performance even at high temperature and high humidity.

As shown in Table 2, Examples 1-22 contain 40 mass parts or more of the oxetane compound which a 1st hardened | cured material layer has two or more oxetanyl groups with respect to 100 mass parts of total amounts of all polymeric compounds. It shows that the optical laminated body which is a hardened | cured material layer can suppress the corrosion of ITO more effectively.

1: polarizing film
2: first cured product layer
3: adhesive layer
4: conductive layer
5: 2nd hardened | cured material layer
6: second protective film
7: first protective film
10: optical laminate
X: Substrate

Claims (6)

On one side of the polarizing film containing a dichroic dye in polyvinyl alcohol-type resin, the 1st hardened | cured material layer comprised by the hardened | cured material of the curable composition containing a polymeric compound, an adhesion layer, and a conductive layer are laminated | stacked in this order. Optical laminated body,
The said 1st hardened | cured material layer is an optical laminated body whose absorbance increase rate represented by following formula (1) is 30% or less:
Absorbance ascent rate (%) = (Abs (360 nm) after immersion – Abs (360 nm) before immersion) / Abs (360 nm) before immersion × 100 (1)
[In formula, Abs (360 nm) after immersion shows the absorbance at 360 nm after immersing hardened | cured material in 50% potassium iodide aqueous solution for 100 hours in the atmosphere of temperature 23 degreeC, 60% of a relative humidity, and Abs before immersion. (360 nm) shows the absorbance at 360 nm before immersion of the cured product in 50% aqueous potassium iodide solution.] On one surface of the polarizing film containing a dichroic dye in polyvinyl alcohol-type resin, the 1st hardened | cured material layer comprised by the hardened | cured material of the curable composition containing a polymeric compound, an adhesion layer, and a conductive layer are laminated | stacked in this order. Optical laminated body,
The said polymeric compound contains the oxetane compound which has two or more oxetanyl groups, and content of this oxetane compound is 40 mass parts or more with respect to 100 mass parts of total amounts of all the polymeric compounds contained in a curable composition. . The optical laminated body of Claim 1 or 2 whose thickness of a 1st hardened | cured material layer is 0.1-15 micrometers. The optical laminated body of any one of Claims 1-3 whose hardened | cured material which comprises a 1st hardened | cured material layer is a photocured material of the curable composition containing the said polymeric compound. The optical laminated body of any one of Claims 1-4 in which the 2nd hardened | cured material layer and the protective film were laminated | stacked on the surface on the opposite side to the 1st hardened | cured material layer of the said polarizing film. The optical laminated body of Claim 5 whose moisture permeability of the said protective film is 1200 g / 24 hours or less in the temperature of 23 degreeC, and 55% of a relative humidity.

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