Liquid crystal aligning agent and lateral field style liquid crystal display element

A technology of liquid crystal display element and liquid crystal aligning agent, which is applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve problems such as insufficiency, and achieve the effects of high reliability, high display quality, and excellent electrical characteristics

Active Publication Date: 2006-05-31
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But now, with the larger screen of liquid crystal display elements and the high precision in order to further improve the display quality, the existing technology is not enough to solve the problem, and it is necessary to improve the material of the liquid crystal alignment film

Method used

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  • Liquid crystal aligning agent and lateral field style liquid crystal display element
  • Liquid crystal aligning agent and lateral field style liquid crystal display element
  • Liquid crystal aligning agent and lateral field style liquid crystal display element

Examples

Experimental program
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Effect test

preparation example Construction

[0033]As the tetracarboxylic dianhydride used in the preparation of the polyamic acid polymer, the cyclobutane tetracarboxylic dianhydride represented by the above formula (III') preferably includes, for example, 1,2,3,4-cyclobutane tetracarboxylic acid dianhydride. Carboxylic acid dianhydride, 1,2-dimethyl-1,2,3,4-cyclobutane tetracarboxylic acid dianhydride, 1,2-diethyl-1,2,3,4-cyclobutane tetra Carboxylic dianhydride, 1,3-dimethyl-1,2,3,4-cyclobutane tetracarboxylic dianhydride, 1,3-diethyl-1,2,3,4-cyclobutane tetra Carboxylic acid dianhydride, 1,2,3,4-tetramethyl-1,2,3,4-cyclobutane tetracarboxylic acid dianhydride. In addition, examples of tetracarboxylic dianhydrides other than the above-mentioned cyclobutane tetracarboxylic dianhydride include butane tetracarboxylic dianhydride, 1,3-dichloro-1,2,3,4-cyclobutane Tetracarboxylic dianhydride, 1,2,3,4-cyclopentane tetracarboxylic dianhydride, 1,2,4,5-cyclohexane tetracarboxylic dianhydride, 3,3',4,4'- Dicyclohexyltetracarboxyli...

Synthetic example 1

[0110] Synthesis example 1 (synthesis of polyimide polymer)

[0111] Combine 22.1 g (0.1 mol) of 2,3,5-tricarboxycyclopentylacetic dianhydride as tetracarboxylic dianhydride and 19.8 g (0.1 mol) of 4,4'-diaminodiphenylmethane as a diamine compound Dissolved in 168g of N-methyl-2-pyrrolidone and reacted for 4 hours at 60°C. Then, the reaction solution was poured into a large excess of methanol to precipitate the reaction product, and then washed with methanol and passed under reduced pressure. After drying at 40°C for 15 hours, 29.3 g of polyamic acid with a logarithmic viscosity of 0.42dl / g was obtained. The obtained polyamic acid was dissolved in 550 g of N-methyl-2-pyrrolidone, and 39.5 g of pyridine and 30.6g of acetic anhydride was dehydrated and closed at 110°C for 4 hours. Precipitation, washing, and pressure reduction were carried out in the same manner as above, to obtain 21.5g of polyamide with a logarithmic viscosity of 0.64dl / g and an imidization rate of 92%. Imide (A-1...

Synthetic example 2

[0112] Synthesis Example 2 (Synthesis of Polyimide Polymer)

[0113] In Synthesis Example 1, except for using 10.8 g (0.1 mol) of p-phenylenediamine as the diamine compound, the same procedure as in Synthesis Example 1 was carried out to obtain polyamic acid. Then, using this, the imidization reaction was performed in the same manner as in Synthesis Example 1, and 24.9 g of polyimide (A-2) having a logarithmic viscosity of 0.77 dl / g and an imidization ratio of 93% was obtained.

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Abstract

This invention provides a liquid crystal orientation agent which can inhibit the decrease of the charge storage and voltage holding ratio and render high quality of liquid crystal display element in the form of horizontal electric field without imprint and afterimage. The liquid crystal orientation agent comprises polyimide polymers and polyamic acid polymers consisted of diamines and tetracarboxylic acid dianhydride, in which more than 50 mol% total diamines are p-phenyldiamines and more than 30 mol% total tetracarboxylic acid dianhydride are cyclobutanetetracarboxylic acids.

Description

Technical field [0001] The present invention relates to a liquid crystal aligning agent for a horizontal electric field type and a horizontal electric field type liquid crystal display element. More specifically, it relates to a liquid crystal aligning agent for a transverse electric field type capable of producing a liquid crystal aligning film for a transverse electric field type having a small charge accumulation, a high voltage retention rate and excellent abrasion resistance, and a liquid crystal aligning film for a transverse electric field type having the same The horizontal electric field type liquid crystal display element. Background technique [0002] Currently, known as a liquid crystal display element is a TN type liquid crystal display element having a so-called TN type (twisted nematic) liquid crystal cell, which is formed on the surface of a substrate provided with a transparent conductive film such as polyamic acid, polyimide, etc. The liquid crystal alignment fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C08G73/10
CPCC08G73/10C08L79/08C09K19/56G02F1/133723
Inventor 熊谷勉栗山敬祐西川通则高桥敦也
Owner JSR CORPORATIOON
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