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Liquid crystal orientation agent, liquid crystal orientation film and liquid crystal display element

A technology of liquid crystal aligning agent and repeating unit, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problem of insufficient improvement of afterimage performance, and achieve the effects of excellent afterimage resistance and coating.

Active Publication Date: 2009-07-22
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even with this technique, the improvement in performance in terms of image retention when thermal stress is applied is not good enough

Method used

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  • Liquid crystal orientation agent, liquid crystal orientation film and liquid crystal display element
  • Liquid crystal orientation agent, liquid crystal orientation film and liquid crystal display element
  • Liquid crystal orientation agent, liquid crystal orientation film and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0225] Synthesis Example 1 (Synthesis of Compound (1'))

[0226] Cholesteryl methacrylate is synthesized according to the following reaction scheme 1.

[0227]

[0228] Reaction scheme 1

[0229] Dissolve 80g of β-cholesterol in 800ml of dehydrated tetrahydrofuran (THF), add 27g of triethylamine, slowly add 36g of methacryloyl chloride dropwise, and stir at room temperature for 3 hours to react. After completion of the reaction, triethylamine hydrochloride was removed by filtration, THF was distilled off under reduced pressure, and 400 ml of chloroform was added. This solution was washed with water, and the organic layer was dried over magnesium sulfate, and then chloroform was distilled off under reduced pressure. Then, recrystallization was performed with ethanol to obtain 54 g of cholestanyl methacrylate as a white solid (yield: 57%).

[0230] In addition, in this Synthesis Example 1, the above operation was repeated according to the above synthesis route as needed, s...

Synthetic example 2

[0231] Synthesis Example 2 (Synthesis (1) of Polymer (1))

[0232] In a four-necked flask equipped with a stirring rod, a three-way valve and a thermometer, 15 g (0.033 moles) of cholestanyl methacrylate prepared in the above-mentioned Synthesis Example 1, glycidyl methacrylate 13g (0.090 mole) of ester, 7.2g (0.084 mole) of methacrylic acid, 7.2g (0.069 mole) of styrene and 7.2g (0.044 mole) of N-cyclohexylmaleimide, then add diethylene glycol as solvent 53 g of ethyl methyl ether, 2.2 g of 2,2'-azobis(2,4-dimethylvaleronitrile) as a polymerization initiator, and 0.96 g of α-methylstyrene dimer as a molecular weight modifier . This was bubbled with a nitrogen stream for about 10 minutes to ventilate the system with nitrogen, and then reacted at 70° C. for 5 hours under a nitrogen atmosphere to obtain a solution containing 48% by weight of the polymer (1-1). The molecular weight of the polymer (1-1) was measured by GPC, Mw=96000, Mw / Mn=7.9, and no peak due to residual monome...

Synthetic example 3

[0233] Synthesis Example 3 (Synthesis (2) of Polymer (1))

[0234] In the above Synthesis Example 2, except that 7.2 g (0.042 moles) of N-phenylmaleimide was used instead of N-cyclohexylmaleimide, the same procedure was carried out as in Synthesis Example 2 to obtain a polymer compound containing 48% by weight. solution of compound (1-2). The molecular weight of the polymer (1-2) was measured by GPC, Mw=108000, Mw / Mn=6.5, and no peak due to residual monomer was identified.

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PUM

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Abstract

The invention provides a liquid crystal oriented agent that can form liquid crystal oriented control force (tilt angle expression power of liquid crystal) having excellent display and can inhibit liquid crystal oriented film accumulated by remaining DC when heat stress considered to be one of main reasons of liquid crystal panel image retention is applied. The liquid crystal oriented agent contains polymers having specific repeated unit represented by the following formula and at least one polymer selected from the following group, the group being composed of polyamic acid and imide polymer obtained by the reaction of tetracarboxylic dianhydride and diamine.

Description

technical field [0001] The invention relates to a liquid crystal aligning agent, a liquid crystal aligning film and a liquid crystal display element. More specifically, it relates to a liquid crystal aligning agent that can form a liquid crystal aligning film that exhibits excellent liquid crystal alignment control ability (pretilt angle expression) and can suppress the accumulation of residual DC when thermal stress is applied, and a liquid crystal aligning agent formed from the liquid crystal aligning agent. A liquid crystal alignment film, and a liquid crystal display element having the liquid crystal alignment film. Background technique [0002] Since liquid crystal calculators began to be mass-produced, liquid crystal display elements have been used in clocks, portable game machines, word processors, notebook personal computers, car navigators, video cameras, portable Information terminals, digital cameras, mobile phones, various monitors, LCD TVs, etc. are widely used...

Claims

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Application Information

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IPC IPC(8): G02F1/1337
CPCC09K19/56G02F1/1337
Inventor 宫本佳和阿部翼林英治西川通则
Owner JSR CORPORATIOON
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