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Liquid crystal aligning agent and liquid crystal display element

A technology of liquid crystal aligning agent and compound, which is applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problem of not being able to improve the charge leakage of liquid crystal panels, and achieve the effect of excellent charge leakage

Active Publication Date: 2009-12-23
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with these means and materials, the purpose of improving the charge leakage in the liquid crystal panel cannot be achieved.

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

[0144] Synthesis Example 1 (Synthesis Example 1 of Imidized Polymer)

[0145] 224g (1.0 mol) of 2,3,5-tricarboxycyclopentyl acetic dianhydride as tetracarboxylic dianhydride, 96.1g (0.89 mol) of p-phenylenediamine as diamine, 3,6-bis(4 -aminobenzoyloxy)cholestane 2.6g (0.010 mole) and N,N'-bis(4-aminophenyl)piperazine 27g (0.10 mole) were dissolved in 3100g N-methyl-2-pyrrolidone , and reacted at room temperature for 6 hours to obtain a solution containing 10% by weight of polyamic acid. The solution viscosity of this polyamic acid solution was 90 mPa·s.

[0146] Then, 600 g of N-methyl-2-pyrrolidone was added to the obtained polyamic acid solution, 136 g of pyridine and 105 g of acetic anhydride were added, and a dehydration ring-closure reaction was performed at 110° C. for 4 hours. After the dehydration ring-closing reaction, the solvent in the system is replaced by new γ-butyrolactone (through this solvent replacement, the pyridine and acetic anhydride used in the dehydrat...

Synthetic example 2

[0147] Synthesis Example 2 (Synthesis Example 2 of Imidized Polymer)

[0148] 112g (0.50 mol) of 2,3,5-tricarboxycyclopentyl acetic dianhydride as tetracarboxylic dianhydride, 38.0g (0.35 mol) of p-phenylenediamine as diamine, 3-(3,5- Diaminobenzoyloxy) cholestane 53.0g (0.10 mol) and N, N'-bis (4-aminophenyl) piperazine 13.4g (0.050 mol) dissolved in 1900g N-methyl-2-pyrrolidone , reacted at room temperature for 6 hours to obtain a solution containing 10% by weight of polyamic acid. The solution viscosity of this polyamic acid solution was 58 mPa·s.

[0149] Then, 600 g of N-methyl-2-pyrrolidone was added to the obtained polyamic acid solution, 116 g of pyridine and 90 g of acetic anhydride were added, and a dehydration ring-closure reaction was performed at 110° C. for 4 hours. After the dehydration ring-closing reaction, the solvent in the system was replaced with a new N-methyl-2-pyrrolidone, and then concentrated to obtain about 1430 g of imidization compound containing...

Synthetic example 3

[0150] Synthesis Example 3 (Synthesis Example 3 of Imidized Polymer)

[0151] 110 g (0.50 mol) of 2,3,5-tricarboxycyclopentyl acetic dianhydride as tetracarboxylic dianhydride, 49 g (0.45 mol) of p-phenylenediamine as diamine, N, N'-bis(4 -Aminophenyl) piperazine 13.4g (0.050 moles) and 3-(3,5-diaminobenzoyloxy) cholestane 26g (0.050 moles) were dissolved in 1800g N-methyl-2-pyrrolidone, It reacted at 60 degreeC for 6 hours, and obtained the solution containing 10 weight% of polyamic acids. The solution viscosity of this polyamic acid solution was 60 mPa·s.

[0152] Then, 1800 g of NMP was added to the obtained polyamic acid solution, and 40 g of pyridine and 51 g of acetic anhydride were added, and a dehydration ring-closure reaction was performed at 110° C. for 4 hours. After the dehydration ring-closing reaction, the solvent in the system is replaced with new N-methyl-2-pyrrolidone to obtain about 1200g of imidized polymer containing 15% by weight of imidization rate of a...

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Abstract

The present invention relates to a liquid crystal aligning agent and a liquid crystal display element. Provided is the liquid crystal aligning agent for forming a liquid crystal aligning film with excellent thermotolerance and charge leakage performance. the liquid crystal aligning agent includes an acid imide polymer with an acid imide rate more than 30% obtained by dewatering a polyamic acid in a closed loop, wherein the polyamic acid is made by the reaction of tetra carboxylic acid dianhydride and a diamine containing a compound with a structure represented by formula (A) and two amido groups, in the formula (A), * represents connection key separately.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent and a liquid crystal display element. More specifically, it relates to a liquid crystal aligning agent capable of forming a liquid crystal aligning film exhibiting excellent heat resistance and excellent charge leakage performance, and a liquid crystal aligning agent capable of suppressing abnormal brightness of a panel caused by static electricity generated during a manufacturing process of a display element panel. Lamps for liquid crystal display elements. Background technique [0002] At present, as a liquid crystal display element, a TN type liquid crystal display element having a so-called TN type (twisted nematic) liquid crystal cell is widely known, and a liquid crystal alignment film is formed on the surface of a substrate on which a transparent conductive film is provided as a substrate for a liquid crystal display element. , the two substrates are placed opposite each other, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56G02F1/1337C08L79/08
CPCC09K19/56G02F1/133703
Inventor 泉谦一川口贵之林英治
Owner JSR CORPORATIOON
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