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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, used in liquid crystal materials, chemical instruments and methods, optics, etc.

Active Publication Date: 2012-01-25
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

[0226] Synthesis Example 1 (Synthesis of Compound (1'))

[0227] Cholesteryl methacrylate was synthesized according to the following reaction scheme 1.

[0228]

[0229] Reaction route 1

[0230] 80 g of β-cholesterol was dissolved in 800 ml of dehydrated tetrahydrofuran (THF), after 27 g of triethylamine was added, 36 g of methacryloyl chloride was slowly added dropwise, and the reaction was carried out by stirring at room temperature for 3 hours. After completion of the reaction, triethylamine hydrochloride was removed by filtration, THF was removed by distillation under reduced pressure, and 400 ml of chloroform was added. The solution was washed with water, and the organic layer was dried with magnesium sulfate, and then the chloroform was distilled off under reduced pressure. Then, it was recrystallized with ethanol to obtain 54 g of white solid cholesteryl methacrylate (yield: 57%).

[0231] In addition, this synthesis example 1 repeats the above operation according to the abo...

Synthetic example 2

[0232] Synthesis Example 2 (Synthesis (1) of Polymer (1))

[0233] Into a four-necked flask equipped with a stirring rod, a three-way valve and a thermometer, 15 g (0.033 mol) of cholesteryl methacrylate prepared in Synthesis Example 1 above, and glycidyl methacrylate were added as monomers. 13g (0.090mol) of ester, 7.2g (0.084mol) of methacrylic acid, 7.2g (0.069mol) of styrene, 7.2g (0.044mol) of N-cyclohexylmaleimide, and diethylene glycol as a 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 regulator . This was bubbled with a nitrogen stream for about 10 minutes, the system was ventilated with nitrogen, and then reacted at 70°C for 5 hours under a nitrogen atmosphere to obtain a solution containing 48% by weight of polymer (1-1). The molecular weight of the polymer (1-1) was measured by GPC, Mw=96000, Mw / Mn=7.9, and no peaks due to residual monomers w...

Synthetic example 3

[0234] Synthesis Example 3 (Synthesis of Polymer (1) (2))

[0235] In Synthesis Example 2 above, except that 7.2 g (0.042 mol) of N-phenylmaleimide was used instead of N-cyclohexylmaleimide, the same procedure as in Synthesis Example 2 was carried out to obtain a polymer containing 48% by weight. 物(1-2) solution. 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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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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Patent Type & Authority Patents(China)
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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