Vertical liquid crystal orientating agent and vertical liquid crystal display element

A technology for liquid crystal display elements and liquid crystal orientation, which is applied to liquid crystal materials, static indicators, instruments, etc., and can solve the problems of reducing the number of liquid crystal display elements and the small size of the parent substrate.

Active Publication Date: 2005-12-21
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] On the other hand, due to the limitation of manufacturing and transportation, the size of the mother substrate is limited, and the number of liquid crystal display elements that can be obtained from a pair of mother substrates is also smaller than before. There is a decrease

Method used

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  • Vertical liquid crystal orientating agent and vertical liquid crystal display element
  • Vertical liquid crystal orientating agent and vertical liquid crystal display element
  • Vertical liquid crystal orientating agent and vertical liquid crystal display element

Examples

Experimental program
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Effect test

Synthetic example 1

[0115] With 2,3,5-tricarboxycyclopentyl acetic acid dianhydride 224.17g (1.0 mole) as tetracarboxylic dianhydride, p-phenylenediamine 68.13g (0.63 mole) as diamine compound, above-mentioned formula (16 ) represented by 193.44 g (0.37 moles) of the diamine compound was dissolved in 4500 g of N-methyl-2-pyrrolidone and reacted at 60° C. for 6 hours. Next, the reaction solution was injected into a large excess of methanol to precipitate the reaction product, and then washed with methanol and dried at 40° C. under reduced pressure for 15 hours to obtain 520 g of polyamic acid with a logarithmic viscosity of 0.57 dl / g . Dissolve 30 g of the obtained polyamic acid in 570 g of N-methyl-2-pyrrolidone, add 5.7 g of pyridine and 7.4 g of acetic anhydride, dehydrate and close the ring at 110 ° C for 4 hours, carry out the same precipitation, washing, and decompression as above to obtain 19.0 g of a polyimide having a logarithmic viscosity of 0.50 dl / g (which is referred to as "polyimide...

Synthetic example 2

[0117] In Synthesis Example 1, except that 77.86 g (0.72 mol) of p-phenylenediamine and 146.38 g (0.28 mol) of the diamine compound represented by the above-mentioned formula (16) were used as the diamine compound, the same procedure as in Synthesis Example 1 was used to obtain 390 g of polyamic acid with a logarithmic viscosity of 0.45 dl / g. Except for using 30 g of the obtained polyamic acid, imidization was carried out in the same manner as in Synthesis Example 1 to obtain 18.9 g of polyimide (called "polyimide (PI- 2)").

Synthetic example 3

[0119]In Synthesis Example 2, except that 95.16 g (0.88 mol) of p-phenylenediamine and 62.74 g (0.12 mol) of the diamine compound represented by the above-mentioned formula (16) were used as the diamine compound, the same operation as in Synthesis Example 2 was performed to obtain 450 g of polyamic acid with a logarithmic viscosity of 0.38 dl / g. Then, except that 4.8 g of pyridine and 6.1 g of acetic anhydride were used, the same operation was performed as in Synthesis Example 2 to obtain 20.3 g of polyimide (which is called "polyimide (PI)" with a logarithmic viscosity of 0.40 dl / g. -3)").

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Abstract

The present invention provides a vertical liquid crystal alignment agent which may stably give a liquid crystal alignment film having excellent coating property and no defects such as coating unevenness and the like. The vertical liquid crystal alignment agent comprises a mixed solvent consisting of a first organic solvent having a surface tension of 39 dyne / cm or more and containing nitrogen atom within molecules, a second organic solvent having a surface tension of 39 dyne / cm or more and containing no nitrogen atom within molecules, and a third organic solvent having a surface tension of 32 dyne / cm or less, and a partially imidated polymer of polyamic acid and / or a polyimide dissolved in the mixed solvent.

Description

technical field [0001] The invention relates to a vertical liquid crystal alignment agent and a vertical liquid crystal display element. More specifically, it relates to a vertical liquid crystal aligning agent capable of stably forming a vertical liquid crystal aligning film free from defects such as coating unevenness and pinholes for a liquid crystal display element made of a large substrate, and a vertical liquid crystal aligning film having a vertical liquid crystal aligning film made of the liquid crystal aligning agent. Liquid crystal display element of liquid crystal alignment film. Background technique [0002] At present, as a liquid crystal display element, there is known a TN type liquid crystal display element having a so-called TN type (twisted nematic) liquid crystal cell, which is formed by forming polyamic acid, polyimide, etc. The liquid crystal alignment film is used as the substrate of the liquid crystal display element, and the two substrates are arrang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133
CPCC09K19/56G02F1/133711G02F1/133723
Inventor 六鹿泰显丸谷英三栗山敬祐西川通则
Owner JSR CORPORATIOON
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