Aligning agent for liquid crystal and liquid crystal display element

A technology of liquid crystal aligning agent and polymer, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve problems such as damage to liquid crystal orientation, and achieve the effect of good coating and excellent film thickness uniformity

Active Publication Date: 2009-08-26
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, although the liquid crystal aligning agent that has added silane coupling agent can improve the film thickness uniformity that forms coating film, but easily produces bubble w

Method used

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  • Aligning agent for liquid crystal and liquid crystal display element
  • Aligning agent for liquid crystal and liquid crystal display element
  • Aligning agent for liquid crystal and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0138] Synthesis example 1

[0139] 109 g (0.50 mol) of pyromellitic dianhydride as tetracarboxylic dianhydride, 98 g (0.50 mol) of 1,2,3,4-cyclobutane tetracarboxylic dianhydride, and 4 as a diamine compound 200g (1.0 mol) of 4-diaminodiphenyl ether was dissolved in a mixed solvent made of 244g of N-methyl-2-pyrrolidone and 2200g of γ-butyrolactone. After reacting at 40°C for 3 hours, an additional 1220g of γ- Butyrolactone, about 4070 g of a solution containing 10% by weight of polyamic acid (A-1) was obtained. The solution viscosity of this solution was 200 mPa·s.

Example Embodiment

[0140] Synthesis Example 2

[0141] Combine 98 g (0.50 mol) of 1,2,3,4-cyclobutane tetracarboxylic dianhydride as tetracarboxylic dianhydride, 109 g (0.50 mol) of pyromellitic dianhydride, and 4, as a diamine compound, 198g (1.0 mol) of 4'-diaminodiphenylmethane was dissolved in a mixed solvent made of 243g N-methyl-2-pyrrolidone and 2190g γ-butyrolactone. After reacting at 40°C for 3 hours, an additional 1210g was added γ-butyrolactone, about 4050 g of a solution containing 10% by weight of polyamic acid (A-2) was obtained. The solution viscosity of this solution was 125 mPa·s.

Example Embodiment

[0142] Synthesis Example 3

[0143] 196 g (1.0 mol) of 1,2,3,4-cyclobutane tetracarboxylic dianhydride as tetracarboxylic dianhydride and 200 g (1.0 mol) of 4,4'-diaminodiphenyl ether as a diamine compound ) Was dissolved in a mixed solvent made of 238g N-methyl-2-pyrrolidone and 2130g γ-butyrolactone, and after reacting at 40°C for 4 hours, 1190g γ-butyrolactone was added to obtain about 3960g containing 10% by weight poly A solution of amic acid (A-3). The solution viscosity of this solution was 210 mPa·s.

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Abstract

The present invention provides an aligning agent for liquid crystal that can forming LCD aligning film with excellent LCD aligning and electrology and will not generate bubbles when coating substrate, good screening characteristics and excellent filmuniformity of coated film. The aligning agent includes (A) 100 weight parts at least one polymer chosen from substance groups of polyamic acid reacted by dianhydride and diamine, and acid imide polymers of the same, and (B) 0.01-100 weight parts specific epoxy radicals compounds represented by the following formula.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent and a liquid crystal display element. More specifically, it is related with the liquid crystal aligning agent excellent in printability, and the liquid crystal display element made from it. 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, and a nematic liquid crystal layer with positive dielectric anisotropy is formed in the gap to form a sandwich structure cell. The long axis of the liquid crystal molecules is continuously twisted 90 from one substrate to the other. Spend. In addition, the STN (Super Twiste...

Claims

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Application Information

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IPC IPC(8): G02F1/1337
CPCC09K19/56G02F1/1337
Inventor 吉尾浩平林英治
Owner JSR CORPORATIOON
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