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Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display device

A technology of liquid crystal alignment agent and repeating unit, which is applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve problems such as improvement, no envisioned burn-in performance, and no consideration of long-term durability, so as to improve burn-in performance and durability Excellent burn-in performance and high reliability

Active Publication Date: 2013-10-02
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of the previous use of liquid crystal display elements, such long-term durability has not been considered. Even the technologies described in the above-mentioned patent documents 1 and 2 have not envisioned improving the burn-in performance after long-term thermal stress is applied to achieve Level required for TV use

Method used

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  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display device
  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display device
  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0244] Synthesis Example 1 (Synthesis of Compound (4'))

[0245] Dissolve 800g of β-cholesterol in 8000ml of dehydrated tetrahydrofuran (THF), add 270g of triethylamine, slowly add 360g 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 then 4000 ml of chloroform was added. The obtained solution was washed with water, and the organic layer was dried over magnesium sulfate, and then chloroform was removed by distillation under reduced pressure. Then, recrystallization was performed with ethanol to obtain 540 g of cholestanyl methacrylate as a white solid (yield: 57.4%).

Synthetic example 2

[0246] Synthesis Example 2 (Synthesis (1) of Polymer (1))

[0247] In a four-necked flask equipped with a stirring bar, a three-way valve and a thermometer, add 10.0 g (0.0595 moles) of 2,2,2-trifluoroethyl methacrylate as a monomer, the compound obtained in the above Synthesis Example 1 Cholesteryl methacrylate 30.0g (0.0657 mol), glycidyl methacrylate 25.0g (0.176 mol), methacrylic acid 10.0g (0.116 mol), styrene 2.50g (0.0240 mol), N-ring Hexylmaleimide 2.50g (0.0139 mole) and 2-hydroxyethyl methacrylate 20.0g (0.154 mole), add the diethylene glycol ethyl methyl ether 200g as solvent again, as polymerization initiator 2 , 4.50 g of 2'-azobis(2,4-dimethylvaleronitrile) and 2.00 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 33.2% by weight of the polymer (1-1). The ...

Synthetic example 3

[0248] Synthesis Example 3 (Synthesis (2) of Polymer (1))

[0249] In a four-necked flask equipped with a stirring bar, a three-way valve and a thermometer, add 5.00 g (0.00940 moles) of 2-(perfluorooctyl) ethyl methacrylate as a monomer, the methacrylic acid prepared in Synthesis Example 1 above. Cholesteryl methacrylate 30.0g (0.0657 mol), glycidyl methacrylate 25.0g (0.176 mol), methacrylic acid 10.0g (0.116 mol), styrene 2.50g (0.0240 mol), N-ring Hexylmaleimide 2.50g (0.0139 mole) and 2-hydroxyethyl methacrylate 25.0g (0.192 mole), add the diethylene glycol ethyl methyl ether 200g as solvent again, as polymerization initiator 2 , 4.50 g of 2'-azobis(2,4-dimethylvaleronitrile) and 2.00 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 33.5% by weight of the polymer (1...

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Abstract

PURPOSE: A liquid crystal aligning agent, a liquid crystal aligning layer, and a liquid crystal display device including thereof are provided to improve the liquid crystal orientation-regulating force, and improve the reliability of the liquid crystal aligning layer. CONSTITUTION: A liquid crystal aligning agent contains a polymer with a recurring unit marked as chemical formula 1, and a polymer selected from the group consisting of tetracarboxylic dianhydride, polyamic acid, and an imidized polymer of the polyamic acid. In the chemical formula 1, R1 refers to a hydrogen atom or a methyl group. B1 refers to a fluoroalkyl group with the carbon number of 1~10 if A1 refers to a single bond methylene group or an alkylene group with the carbon number of 2~10.

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 alignment film that can form a liquid crystal alignment film that exhibits excellent liquid crystal alignment control (pretilt angle expression), has high voltage retention and reliability, and can suppress burn-in after long-term application of thermal stress agent, and a liquid crystal aligning film formed from the liquid crystal aligning agent, and a liquid crystal display element having the liquid crystal aligning 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, etc. are widely used, and act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56G02F1/1337
Inventor 小山贵由
Owner JSR CORPORATIOON
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