Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
  • C09B67/0033—Blends of pigments; Mixtured crystals; Solid solutions
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B5/00—Optical elements other than lenses
  • G02B5/30—Polarising elements
• • G—PHYSICS
  • G02—OPTICS
  • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
  • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
  • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
  • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
  • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
  • G02F1/1333—Constructional arrangements; Manufacturing methods
  • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B33/00—Electroluminescent light sources
  • H05B33/02—Details
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
  • H10K59/80—Constructional details
  • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light

Definitions

• Dye-based polarizing plates have high heat resistance, high humidity and heat durability, and high stability, and are characterized by high color selectivity due to the blending of dyes, while iodine-based polarizing plates having the same degree of polarization. There was a problem that the transmittance and the contrast were low as compared with the plate. Therefore, a polarizing element having high transmittance, high transmittance, and high polarization characteristics in addition to maintaining high durability and various color selectivity is desired.
• the present invention relates to the following [Invention 1] to [Invention 20], but is not limited thereto.
• [Invention 1] A polarizing element containing an azo compound represented by the following formula (1) or a salt thereof and an azo compound represented by the following formula (2) or a salt thereof.
• Ay 1 or Ay 2 each independently represents a naphthyl group which may have a substituent or a phenyl group which may have a substituent, and m or n are independently 0 or 1 respectively.
• C1-4 aliphatic hydrocarbon group examples include linear alkyl groups such as methyl group, ethyl group, n-propyl group and n-butyl group, sec-butyl group and tert-butyl group. Examples thereof include unsaturated hydrocarbon groups such as a branched alkyl group and a vinyl group.
• substituents are more preferably a sulfo group, a hydrogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, a carboxy group, a sulfoethoxy group, a sulfopropoxy group, a sulfobutoxy group, a chloro group, a nitro group, and the like.
• it is an amino group, and particularly preferably a sulfo group, a carboxy group, a hydrogen atom, a methyl group, or a methoxy group. It is preferable that at least one of Ay 1 and Ay 2 in the formula (1) is a phenyl group which may have the substituent.
• anilines having a substituent as represented by the following formula (H) are reacted with the acid chloride represented by the following formula (I), and then a reduction reaction is carried out, and the amino represented by the following formula (J) is carried out.
• the azo compound of the formula (1) is obtained by reacting the disazoamino compound (G) and the monoazoamino compound (N) with 4-nitrophenyl chloroformic acid, which is a ureidating agent.
• the diazotization step is carried out by the normal method of mixing a mineral acid aqueous solution such as hydrochloric acid or sulfuric acid of the diazo component or a nitrite such as sodium nitrite with a turbid solution, or a neutral or weak alkaline diazo component. This is done by the reverse method of adding nitrite to the aqueous solution and mixing it with mineral acid.
• the temperature of diazotization is preferably ⁇ 10 to 40 ° C.
• the coupling step with anilines is carried out by mixing an acidic aqueous solution such as hydrochloric acid or acetic acid with each of the above diazo solutions at a temperature of ⁇ 10 to 40 ° C. and acidic conditions of pH 2 to 7.
• substitution position of the phenyl group in which Rc 11 to Rc 14 are substituted when the substitution position of the azo group on the ureido skeleton side is set to the 1st position, preferably only the 2nd position of the phenyl group, only the 5th position, the 2nd position and the 6th position are used. It is a combination of positions, a combination of 2nd and 5th positions, a combination of 3rd and 5th positions, and particularly preferably a combination of 2nd and 5th positions and 2nd and 5th positions.
• the phenyl group has two or more substituents
• at least one of those substituents is a sulfo group or a carboxy group
• the other substituents are a sulfo group, a carboxy group, an alkyl group of C1-4, C1. It is preferably an alkoxy group of 4 to 4, an alkoxy group of C1 to 4 having a sulfo group, a hydroxy group, a nitro group, an amino group, or a substituted amino group (particularly, an acetylamino group or an alkylamino group of C1 to 4).
• Xc 2 is a phenylamino group which may have at least one substituent
• the phenylamino group is unsubstituted or preferably a lower alkyl group, a lower alkoxy group, a sulfo group, and the like. It has one or two substituents selected from an amino group and a lower alkylamino group, more preferably one or two substituents selected from a methyl group, a methoxy group, a sulfo group and an amino group. ..
• the absolute values of chromaticity a * -s and b * -s required for one measurement sample are 1.0 or less (-1.0 ⁇ a * -s ⁇ 1.0,-, respectively. 1.0 ⁇ b * ⁇ s ⁇ 1.0) is preferable.
• a * -p is preferably -2.0 to 2.0 (-2.0 ⁇ a * -p ⁇ 2.0), and b * -p is -2.0 to 3.0 (-2.0 ⁇ a * -p ⁇ 2.0).
• -2.0 ⁇ b * -p ⁇ 3.0) is preferable.
• Such a polarizing element is a neutral color by itself, and can display high-quality white when displayed in white.
• Example 2 The film obtained by applying the swelling treatment was used as compound example 1-217 (WO2018 / 181470) as an azo compound of the formula (1) having 1500 parts by mass of water, 1.5 parts by mass of sodium tripolyphosphate, and 1.5 parts by mass of anhydrous brazing glass. 0.27 parts by mass of the azo compound of the formula (A-93), 0.22 parts by mass of the compound example 2-8 obtained in Synthesis Example 1 as the azo compound of the formula (2), of the formula (4).
• Compound Example 4-29 obtained as an azo compound by a method according to the production method of Non-Patent Document 1 was immersed in a dyeing solution at 45 ° C. containing 0.39 parts by mass for 8 minutes to contain the azo compound. Made a polarizing plate in the same manner as in Example 1.
• Example 10 In Example 1, only the aqueous solution (staining solution) containing the azo compound had the same composition as in Example 1 of Patent Document 3, and the respective staining times were set to 6 minutes, 5 minutes, and 3 minutes in the same manner. The time for immersing the swollen film in the aqueous solution was adjusted so that the single transmittance Ys after correction of the luminosity factor, which will be described later, was about 41% or about 44%, and the azo compound was added to the polarized light of Comparative Examples 10 to 12, respectively. A plate was made.
• the single transmittance Ys (%) after the visual sensitivity correction, the parallel position transmittance Yp (%) after the visual sensitivity correction, and the orthogonal position transmittance Yc (%) after the visual sensitivity correction are in the wavelength region of 380 to 780 nm. JIS Z 8722: 2009 for each of the single transmittance Ts of each wavelength, the parallel position transmittance Tp of each wavelength, and the orthogonal position transmittance Tc of each wavelength obtained at predetermined wavelength intervals d ⁇ (here, 5 nm). It is the transmittance corrected to the visual sensitivity according to.
• the polarizing element of the present invention can be designed so that it can sufficiently express achromatic colors in both parallel and orthogonal positions, that is, white and black, while having high transmittance and high degree of polarization. It was shown that the polarizing plate can be realized.
• the polarizing element or polarizing plate of the present invention is used for a liquid crystal display device, for example, a reflective liquid crystal display device, a transflective liquid crystal display device, and an organic electroluminescence other than the liquid crystal display device.
• the liquid crystal display device provided with the polarizing element or the polarizing plate of the present invention can express high-quality paper-like white and neutral black. Further, the liquid crystal display device can be used for a liquid crystal display device having high durability, high reliability, long-term high contrast, and high color reproducibility.

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• Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Nonlinear Science (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Mathematical Physics (AREA)
• Crystallography & Structural Chemistry (AREA)
• Polarising Elements (AREA)
• Liquid Crystal (AREA)

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Citations (5)

• 2021
  • 2021-09-27 JP JP2022553940A patent/JP7828896B2/ja active Active
  • 2021-09-27 WO PCT/JP2021/035308 patent/WO2022071201A1/ja not_active Ceased
  • 2021-09-27 CN CN202180065113.8A patent/CN116261924A/zh active Pending
  • 2021-09-28 TW TW110136042A patent/TWI886343B/zh active

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