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Alignment film and composition for alignment film

A technology of alignment film and composition, applied in the direction of instruments, polarizing elements, optics, etc., can solve the problem of low heat resistance of dyes, achieve the effect of improving alignment characteristics and enhancing alignment binding force

Active Publication Date: 2021-03-23
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the heat resistance of the dye is low, it is necessary to lower the temperature of the process after the production of the color filter to 180° C. or lower than conventionally used temperatures (Patent Document 6)

Method used

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  • Alignment film and composition for alignment film
  • Alignment film and composition for alignment film
  • Alignment film and composition for alignment film

Examples

Experimental program
Comparison scheme
Effect test

manufacture example

[0439] As one of specific production examples of compound A, a method for derivation of compound A (exemplary compound A3) containing a phthalimide structure as a partial structure (P) will be described. In addition, Compound E can also be produced by the same method.

[0440] It is known that the imide skeleton is generally derived from the condensation of an acid anhydride or dicarboxylic acid with an amine, the alkylation of a hydrogenated imide, or the reaction with an amino group. Here, after constructing a phthalimide structure having a hydroxyl group by reacting a primary amine having a hydroxyl group as a functional group capable of introducing an epoxy group, and phthalic anhydride, glycidylation of the hydroxyl group or olefination of the hydroxyl group is performed. Propylation. Further, by subsequent oxidation of an allyl group using a known oxidizing agent, an epoxy group can be introduced, and compound A3(1 3 =m 3 = 1).

[0441] [chem 38]

[0442]

[0443...

Embodiment 1

[0607] Weigh the compound and curing agent shown in Example 1 of Table 1 with a sample bottle, dissolve it in the solvent described in Example 1 of Table 1 so that the solid content concentration becomes 7 wt%, and then filter to obtain the combination for alignment film. Object 1.

[0608] The composition 1 for an alignment film was coated on a glass substrate by a spin coating method, heated at 80° C. for 1 minute, and cured at the curing time described in Table 1 to obtain an alignment film 1 . This alignment film 1 was rubbed in one direction using a rayon cloth.

[0609] (Production of anisotropic pigment film)

[0610] 20 parts of the azo compound represented by the formula (21) and 1 part of the compound represented by the formula (22) were added to 79 parts of water, stirred to dissolve them, and the insoluble components were removed by filtration to obtain a combination for anisotropic membranes. thing.

[0611] [Chemical 53]

[0612]

[0613] (Coating of compo...

Embodiment 2～10

[0616] Compositions 2-10 for alignment films, alignment films 2-10, and anisotropic dye films 2-10 were obtained by the method similar to Example 1.

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Abstract

The object of the present application is to provide an alignment film having a high alignment binding force and a composition capable of producing an alignment film having a high alignment binding force to an anisotropic dye film composition and the like even at low temperature. The invention relates to an epoxy resin cured alignment film, which is an epoxy resin cured alignment film containing at least one of a partial structure (P1) and a partial structure (P2), and the partial structure (P1) in the epoxy resin cured alignment film ) and the partial structure (P2) have a ratio of at least one of 0.5% by mass or more. Wherein, the partial structure (P1) is an aromatic ring containing a heteroatom, and the partial structure (P2) is a substance represented by the following formula (1) (in the formula (1), R 1 Represents a divalent group containing heteroatoms and unsaturated bonds, and R 1 The bonded ring is a single ring).

Description

technical field [0001] The present invention relates to a composition for an alignment film used when forming an anisotropic dye film formed by a wet film-forming method, an alignment film obtained using the composition for an alignment film, and an optical element. Background technique [0002] In a liquid crystal display (LCD), a linear polarizing film or a circular polarizing film is used in order to control the optical rotation and birefringence of a display. Circular polarizing films are also used in light-emitting display devices such as organic light-emitting diodes (OLEDs) and input-output devices such as touch panels to prevent reflection of external light. [0003] Conventionally, among these polarizing films (anisotropic dye films), iodine-based polarizing films produced by dyeing polyvinyl alcohol (PVA) with iodine, stretching, and crosslinking have been widely used. However, iodine, which has been used as a dichroic substance in this film, has a high sublimatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30C08G59/18G02F1/1335
CPCC08G59/18G02F1/1335G02B5/30G02F1/133711
Inventor 住谷直子矢部晃子藤森尚美西村政昭青叶充哉大泽辉恒
Owner MITSUBISHI CHEM CORP
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