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Liquid crystal aligning agent, liquid crystal alignment film, method for forming the liquid crystal alignment film, and liquid crystal display device

A technology of liquid crystal alignment agent and liquid crystal alignment film, which is applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of large cumulative exposure and insufficient sensitivity, achieve high radiation sensitivity, reduce manufacturing costs, and produce sex high effect

Inactive Publication Date: 2012-07-04
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that heating is necessary during radiation exposure, or a large cumulative exposure dose is required.
In addition, although the conventional liquid crystal alignment treatment method using polyimide resin does not require heating during radiation irradiation, there is a problem of insufficient sensitivity.

Method used

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  • Liquid crystal aligning agent, liquid crystal alignment film, method for forming the liquid crystal alignment film, and liquid crystal display device
  • Liquid crystal aligning agent, liquid crystal alignment film, method for forming the liquid crystal alignment film, and liquid crystal display device
  • Liquid crystal aligning agent, liquid crystal alignment film, method for forming the liquid crystal alignment film, and liquid crystal display device

Examples

Experimental program
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Effect test

preparation example Construction

[0103]

[0104] It is preferable that the liquid crystal aligning agent of this invention melt|dissolves and contains the said polyamic acid or polyimide, and other components arbitrarily mixed as needed in an organic solvent, and is comprised.

[0105] As the organic solvent used in the liquid crystal aligning agent of the present invention, for example, N-methyl-2-pyrrolidone, γ-butyrolactone, γ-butyrolactam, N,N-dimethylformamide, N, N-Dimethylacetamide, 4-Hydroxy-4-methyl-2-pentanone, Ethylene Glycol Monomethyl Ether, Butyl Lactate, Butyl Acetate, Methyl Methoxypropionate, Ethoxypropionate Ethyl ether, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol n-propyl ether, ethylene glycol isopropyl ether, ethylene glycol n-butyl ether (butyl cellosolve), ethylene glycol dimethyl ether, ethylene glycol ethyl ether Ester, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl eth...

Embodiment

[0139] Hereafter, although an Example demonstrates this invention concretely, this invention is not limited by these Examples.

[0140]

Synthetic example 1

[0142]Dissolve 0.1mol (24.82g) bicyclo[2.2.2]oct-7-one-2,3,5,6-tetracarboxylic dianhydride and 0.1mol (41.05g) in 373.26g N-methyl-2-pyrrolidone 2,2-bis[4-(4-aminophenoxy)phenyl]propane, reacted at room temperature for 6 hours. Next, the reaction mixture was mixed with a very large excess of methanol to precipitate the reaction product. Then, it wash|cleaned with methanol, it dried at 40 degreeC of reduced pressure for 15 hours, and obtained 65 g of polyamic-acid A-1 (yield rate 98.7%).

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Abstract

The invention relates to a liquid crystal aligning agent, a liquid crystal alignment film, a method for forming the liquid crystal alignment film, and a liquid crystal display device. The invention aims at providing a liquid crystal aligning agent capable of forming a liquid crystal alignment film featuring excellent radioactive ray sensitiveness and excellent liquid crystal alignment performance and electrical characteristics via the light alignment method of low exposure amount. Further provided are a method for forming a liquid crystal alignment film by using the liquid crystal agent, a liquid crystal film, and a liquid crystal display element having the liquid crystal alignment film. The liquid crystal alignment agent comprises polyamic acid and / or polyimide having a double-ring (2.2.2) octylene skeleton. The polyamic acid comprises a structural unit showed in formula (1) and the polyimide having a structural unit shown in formula (2).

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent suitable for photo-alignment, a liquid crystal aligning film, a method for forming a liquid crystal aligning film, and a liquid crystal display element. Background technique [0002] Liquid crystal displays (LCDs) are widely used in televisions, various monitors, and the like. As the display element of LCD, it is known to have TN (twisted nematic) type; STN (super twisted nematic) type; IPS (in-plane switching) type; change the electrode structure of IPS type, improve the aperture ratio of the display element part, thereby A display element of a liquid crystal cell such as an FFS (Fringe Field Switching) type that improves luminance (see Patent Documents 1 and 2). [0003] As a method for aligning the liquid crystal of the liquid crystal cell, it is known to form an organic film such as a liquid crystal alignment film on the surface of a substrate, and rub the surface of the organic film...

Claims

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Application Information

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IPC IPC(8): C09K19/56G02F1/1337C08G73/12
CPCC08G73/12C08L79/08C09K19/56G02F1/1337
Inventor 永尾隆阿部翼秋池利之镰田彩加德久博昭
Owner JSR CORPORATIOON
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