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Liquid crystal aligning agent and liquid crystal display element

A technology of liquid crystal aligning agent and carboxylic acid, which is applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of more and more severe harshness, and achieve good storage stability, less reduction in voltage retention, and liquid crystals. Excellent orientation effect

Active Publication Date: 2014-11-26
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, it has been found that the harshness of the above-mentioned use environment tends to become more and more severe, so it is required to further improve the heat resistance of the liquid crystal aligning film in particular.

Method used

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  • Liquid crystal aligning agent and liquid crystal display element
  • Liquid crystal aligning agent and liquid crystal display element
  • Liquid crystal aligning agent and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0375] In a reaction vessel with a stirrer, thermometer, dropping funnel and reflux condenser, add 100.0 g of 2-(3,4-epoxycyclohexyl) ethyl trimethoxysilane, 500 g of methyl isobutyl ketone and 10.0 g of triethylamine, mixed at room temperature. Next, after adding 100 g of deionized water dropwise over 30 minutes from the dropping funnel, it was reacted at 80° C. for 6 hours while mixing under reflux. After the reaction, the organic layer was taken out, washed with 0.2% by weight of ammonium nitrate aqueous solution until the washed water was neutral, and the solvent and water were distilled off under reduced pressure to obtain polyorganosiloxane EPS-1, which was viscous Transparent liquid.

[0376] The polyorganosiloxane EPS-1 is carried out 1 In the H-NMR analysis, a peak based on the oxiranyl group was obtained at a chemical shift (δ)=3.2ppm near the theoretical intensity, and it was confirmed that no side reaction occurred in the epoxy group during the reaction.

[0377...

Synthetic example 2

[0382] 1.80 g of monomethyl terephthalate, 3.27 g of di-tert-butyl dicarbonate, and 25 ml of THF were mixed and stirred at room temperature for 10 minutes. After adding 0.37 g of 4-dimethylaminopyridine, the reaction was stirred at 25° C. for 6 hours. After mixing with ethyl acetate, it was washed with saturated aqueous sodium bicarbonate and distilled water. Concentration and drying yielded 1.54 g of the target intermediate. 1.16g of the above intermediate, 0.42g of lithium hydroxide monohydrate, 6ml of methanol, and 2ml of distilled water were mixed, and stirred and reacted at 25°C for 1 hour. After mixing with 50 ml of ethyl acetate, it was washed with dilute hydrochloric acid and distilled water, and concentrated. The resulting powder was mixed with chloroform, and the insoluble components were removed by filtration. The filtrate was concentrated and dried to obtain 0.80 g of compound b (B-1-1) as a white powder.

Synthetic example 3

[0384] According to the following routes, 45 g of compounds represented by compound b (B-1-2) were obtained respectively.

[0385]

[0386] 5.0 g of (1,1-dimethylethyl)methyl 1,3-benzoate, 16.35 g of di-tert-butyl dicarbonate, and 50 ml of THF were mixed, and stirred at room temperature for 10 minutes. After adding 1.85 g of 4-dimethylaminopyridine, the reaction was stirred at 25° C. for 6 hours. After mixing with ethyl acetate, it was washed with saturated aqueous sodium bicarbonate and distilled water. Concentration and drying yielded 7.70 g of the target intermediate. 5.80 g of the above intermediate, 2.10 g of lithium hydroxide monohydrate, 20 ml of methanol, and 4 ml of distilled water were mixed, and stirred and reacted at 25° C. for 1 hour.

[0387] After mixing with 50 ml of ethyl acetate, it was washed with dilute hydrochloric acid and distilled water, and concentrated. The resulting powder was mixed with chloroform, and the insoluble components were removed by ...

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Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal aligning agent that has excellent liquid crystal aligning property and high light resistance, suppresses a lowering of a voltage holding ratio even when the layer is irradiated with light of high intensity, can form a liquid crystal aligned layer having excellent electric characteristics, and has good storage stability.SOLUTION: A liquid crystal aligning agent of the present invention includes a polyorganosiloxane having at least one kind of structure selected from the group consisting of an acetal ester structure of a carboxylic acid, a ketal ester structure of a carboxylic acid, a 1-alkyl cycloalkyl ester structure of a carboxylic acid and a tertiary alkyl ester structure of a carboxylic acid.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent and a liquid crystal display element. Background technique [0002] At present, as a liquid crystal display element, a TN type liquid crystal display element having a so-called TN (Twisted Nematic: twisted nematic) liquid crystal cell is known, which forms a liquid crystal orientation composed of an organic resin or the like on the surface of a substrate provided with a transparent conductive film. As a substrate for liquid crystal display elements, these two pieces are arranged opposite to each other, and a nematic liquid crystal layer with positive dielectric anisotropy is formed in the gap to form a box with a sandwich structure. The long axis of the liquid crystal molecules changes from one piece to the other. The substrate is continuously twisted 90° towards the other substrate. In addition, we have also developed STN (Super Twisted Nematic) type liquid crystal display elements that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56G02F1/1337
CPCC08G77/04C08L79/08C08L83/06C09K19/56G02F1/133723
Inventor 铃木敬一中田正一秋池利之杉山文隆马场美智子
Owner JSR CORPORATIOON
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