Liquid crystal alignment agent for photoalignment, liquid crystal alignment film and manufacturing method thereof, liquid crystal display element, compound, and polymer

A liquid crystal alignment agent and liquid crystal alignment technology, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of easy drop in voltage retention rate, increase of impurity ions, poor electrical characteristics, etc., and achieve good sensitivity, burn-in Less, good liquid crystal alignment effect

Active Publication Date: 2016-08-10
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In addition, in the case of a photo-alignment method in which chemical changes are produced by irradiation of ultraviolet rays, etc., compared with the conventional liquid crystal alignment film using rubbing treatment, there is a tendency that the electrical characteristics are generally inferior, especially when accompanied by photo-decomposition of polymers. In the case of the liquid crystal cell, there is a problem that the impurity ions in the liquid crystal cell increase and the voltage retention rate tends to decrease.

Method used

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  • Liquid crystal alignment agent for photoalignment, liquid crystal alignment film and manufacturing method thereof, liquid crystal display element, compound, and polymer
  • Liquid crystal alignment agent for photoalignment, liquid crystal alignment film and manufacturing method thereof, liquid crystal display element, compound, and polymer
  • Liquid crystal alignment agent for photoalignment, liquid crystal alignment film and manufacturing method thereof, liquid crystal display element, compound, and polymer

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preparation example Construction

[0169] As the solvent used in the preparation of the photoalignment agent of the present invention, a solvent capable of dissolving the polymer contained in the photoalignment agent can be used. In addition, a poor solvent for the polymer may be used in combination within the range in which the polymer contained in the photoalignment agent does not precipitate. As the solvent used in the preparation of the photoalignment agent of the present invention, specifically, at least one of the first solvent shown in the following [A] and the second solvent shown in the following [B] is preferred , and more preferably contain both the first solvent and the second solvent.

[0170] [A] As at least one selected from the group consisting of a compound represented by the following formula (4), a compound represented by the following formula (5), and 1,3-dimethyl-2-imidazolidinone The first solvent of the species.

[0171]

[0172] (In formula (4), R 11 It is a monovalent hydrocarbon ...

Embodiment 1

[0252]In a 2000 mL three-necked flask equipped with a stirring bar, 93.3 g of trimellitic acid chloride was taken, and 450 g of tetrahydrofuran was added thereto, followed by stirring and dissolving. Thereafter, it was cooled to 0° C., 30.0 g of 1,4-benzenedithiol dissolved in 200 g of pyridine was slowly added dropwise thereto, and stirred at room temperature for 20 hours. The solid deposited at this time was removed by filtration, and the filtrate was poured into 500 g of hexane for reprecipitation, and the precipitate (white solid) was recovered by filtration. By recrystallizing this white solid with 200 g of acetic anhydride, 21.2 g of a compound (A-3) represented by the formula (a-3) was obtained.

Embodiment 2

[0254] The above synthesis was carried out except that 46.1 g of 4,4'-biphenyldithiol was used instead of 1,4-benzenedithiol, and the amount of hexane during reprecipitation was changed to 2,500 g. In the same manner as in Example 1, 26.3 g of the compound (A-4) represented by the formula (a-4) was thus obtained.

[0255]

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Abstract

The present invention provides a method for manufacturing a liquid crystal alignment film capable of producing a liquid crystal display device which shows excellent liquid crystal alignment properties by light irradiation on a coating layer, has low element causing burn-in and exhibits high voltage holding ratio. The method for manufacturing a liquid crystal alignment film comprises: a film formation process of spraying a liquid crystal aligning agent for photoalignment including polymers (c) having a structure (Y), which is represented by a formula 1 in a main chain and is at least one selected from the group consisting of polyamic acid, polyamic acid ester and polyimide, on a substrate and forming a coating layer; and a light irradiation process of forming a liquid alignment film by irradiating light on the coating layer. In the formula, X1 is a sulfur atom or an oxygen atom. * represents a bond. And at least one among two * is combined to a direction ring.

Description

technical field [0001] The present invention relates to a method for manufacturing a liquid crystal alignment film, a liquid crystal alignment agent for photo-alignment, a liquid crystal display element, a compound and a polymer, and in particular to a method for forming a liquid crystal alignment film of a liquid crystal display element in a transverse electric field mode by a photo-alignment method technology. Background technique [0002] Conventionally, as a liquid crystal display element, various driving methods having different electrode structures or the physical properties of liquid crystal molecules used have been developed. ) type, Vertical Alignment (Vertical Alignment, VA) type and other longitudinal electric field liquid crystal display elements, or in-plane switching (In-Plane Switching, IPS) method, fringe field switching (Fringe Field Switching, FFS) method and other transverse electric field methods Various liquid crystal display elements such as liquid cry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56C08G73/10G02F1/1333G02F1/1337C07D307/89
CPCC07D307/89C08G73/1025C08G73/1046C08J7/00C08L79/08C09K19/56G02F1/133723
Inventor 伊藤贤一秋池利之永尾隆
Owner JSR CORPORATIOON
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