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

A technology of liquid crystal aligning agent and liquid crystal aligning film, applied in the directions of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of good enough performance and achieve the effect of excellent printing characteristics

Inactive Publication Date: 2008-01-30
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, low-voltage drive type liquid crystal display elements for the purpose of reducing power consumption have become more stringent in printing characteristics, and the performance of conventional liquid crystal display elements cannot be said to be good enough.
In the liquid crystal aligning film made of the polyamic acid as the polyimide precursor and the imide polymer having the structure obtained by dehydrating and ring-closing it, when the liquid crystal aligning film is used For liquid crystal display elements, although the liquid crystal alignment ability is excellent and a sufficiently high voltage retention rate is obtained, most of them have problems in printing characteristics.

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

[0150] 112g (0.50 mole) of 2,3,5-tricarboxycyclopentylacetic dianhydride as tetracarboxylic dianhydride and 1,3,3a,4,5,9b-hexahydro-8-methyl-5- (Tetrahydro-2,5-dioxo-3-furyl)naphthalene[1,2-c]furan-1,3-dione 157g (0.50 mol), p-phenylenediamine as diamine compound 96g (0.89 mol), 25 g (0.10 mol) of diaminopropyltetramethyldisiloxane, and 13 g (0.020 mol) of 3,6-bis(4-aminobenzoyloxy)cholestane, as monoamine 8.1 g (0.030 mol) of n-octadecylamine was dissolved in 960 g of N-methyl-2-pyrrolidone and reacted at 60° C. for 6 hours. A small amount of the obtained polyamic acid solution was separated, and NMP was added to measure the viscosity of the solution with a solid content concentration of 10%, which was 60 mPa·S. Then, 2700 g of N-methyl-2-pyrrolidone was further added to the obtained polyamic acid solution, and 396 g of pyridine and 409 g of acetic anhydride were added, followed by dehydration and ring closure at 110° C. for 4 hours. After the imidization reaction, replace ...

Synthetic example 2

[0152] 196 g (1.0 mol) of 1,2,3,4-cyclobutanetetracarboxylic dianhydride as tetracarboxylic dianhydride, 2,2'-dimethyl-4,4'-diamine as diamine compound 212 g (1.0 mol) of aminobiphenyl was dissolved in 370 g of N-methyl-2-pyrrolidone and 3300 g of γ-butyrolactone, and reacted at 40° C. for 3 hours. About 3700 g of a solution of polyamic acid (this is referred to as "polyamic acid (B-1)") having a solution viscosity of 160 mPa·S was obtained.

Synthetic example 3

[0154] 10 g (0.051 mol) of 2,7-diaminofluorene, 3.8 g (0.041 mol) of epichlorohydrin, 100 ml of tetrahydrofuran, and 4.5 ml of water were mixed, and heated and stirred at 80° C. for 4 hours. After lowering the reaction temperature to 60° C., 10 g of a 50% NaOH aqueous solution was added dropwise. After heating and stirring for 4 hours, unreacted epichlorohydrin was distilled off under reduced pressure. The residue was separated and washed with toluene / water, and the solvent was distilled off to obtain 13.9 g of the target epoxy substrate (C-1).

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Abstract

The present invention relates to a liquid crystal aligning agent, a liquid crystal aligning film and a liquid crystal display device. The invention provides a liquid crystal aligning agent for forming the liquid crystal aligning film which can represent high pressure-retaining ratio and the print character of the liquid crystal film is excellent. The liquid crystal aligning agent includes the polyamic acid or its imine polymer and the diamine-compounds of diaminocarbazole, diaminofluorene, etc.

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 aligning agent having good printing characteristics regardless of the type of electrodes constituting a liquid crystal display element, a liquid crystal aligning film obtained from the liquid crystal aligning agent, and a liquid crystal display element having the film. Background technique [0002] In the past, a TN-type liquid crystal display element having a TN (Twisted Nematic) type liquid crystal cell is known, which forms a positive dielectric anisotropy between two substrates with a liquid crystal alignment film formed on the surface through a transparent conductive film. The nematic liquid crystal layer constitutes a cell with a sandwich structure, and the long axes of the above-mentioned liquid crystal molecules are continuously twisted by 90 degrees from one substrate t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C09K19/38
CPCC08K5/18C08K5/3417C08L79/08C09K19/56G02F1/1337
Inventor 安田博幸林英治西川通则
Owner JSR CORPORATIOON
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