Liquid crystal orientation agent

A technology of liquid crystal aligning agent and organic group, applied in the field of liquid crystal aligning agent, can solve problems such as sintering, and achieve the effect of excellent sintering characteristics

Active Publication Date: 2008-06-25
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a liquid crystal display element with a reflective electrode uses the alignment film used in the existing ITO electrode, there will be a problem of sintering.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0120] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to these examples. Transparency, voltage retention, and sinterability of Examples and Comparative Examples were evaluated by the following methods.

[0121] [transparency]

[0122] As a measurement device, a HITACHI U-2010 spectrophotometer (manufactured by Hitachi, Ltd.) was used. On a quartz substrate with a thickness of 1.5mm, use a spinner to coat the liquid crystal alignment agent of the present invention prepared above, and dry it at 180°C for 1 hour to form a dry film thickness coating film. The measurement of the transmittance of the produced coating film was performed. For transmittance measurement, values ​​at wavelengths of 700nm, 600nm, 500nm, 450nm, 400nm, 350nm and 300nm were obtained. The transmittance at any measurement wavelength was judged to be good when it was not less than 90%, and the case was judged not to be good othe...

Synthetic example 1

[0128] 224.17g (0.5 moles) of 2,3,5-tricarboxycyclopentylacetic acid dianhydride and 157.14g (0.5 moles) of 1,3,3a,4,5,9b-hexahydro-8-methyl-5- (Tetrahydro-2,5-dioxo-3-furyl)-naphtho[1,2-c]-furan-1,3-dione as tetracarboxylic dianhydride, 94.62g (0.875mol) to Phenylenediamine, 32.02g (0.1 mole) 2,2'-bistrifluoromethyl-4,4'-diaminobiphenyl and 6.43g (0.01 mole) 3,6-bis(4-aminobenzoyloxy base) cholesterol as a diamine compound, 10.85 g (0.03 mol) of 4-aminophenyl octadecyl ether as a monoamine was dissolved in 4,500 g of N-methyl-2-pyrrolidone, and reacted at 60° C. for 6 hours.

[0129] Then, the reaction solution was poured into a large excess of methanol to precipitate the reaction product. Then, it wash|cleaned with methanol, and dried at 40 degreeC under reduced pressure for 15 hours, and obtained the polyamic acid 410g of logarithmic viscosity 0.87dl / g. 30 g of the obtained polyamic acid was dissolved in 570 g of N-methyl-2-pyrrolidone, 23.4 g of pyridine and 18.1 g of ac...

Synthetic example 2

[0131] 224.17g (0.5 moles) of 2,3,5-tricarboxycyclopentylacetic acid dianhydride and 157.14g (0.5 moles) of 1,3,3a,4,5,9b-hexahydro-8-methyl-5- (Tetrahydro-2,5-dioxo-3-furyl)-naphtho[1,2-c]-furan-1,3-dione as tetracarboxylic dianhydride, 94.62g (0.875mol) to Phenylenediamine, 24.85 g (0.1 mol) of bisaminopropyl tetramethyldisiloxane and 6.43 g (0.01 mol) of 3,6-bis(4-aminobenzoyloxy)cholesterol as diamine compounds, 10.85 g (0.03 mol) of 4-aminophenyl octadecyl ether was dissolved in 4,500 g of N-methyl-2-pyrrolidone as a monoamine, and reacted at 60° C. for 6 hours. Then, the reaction solution was poured into a large excess of methanol to precipitate the reaction product. Then, it wash|cleaned with methanol, and dried at 40 degreeC under reduced pressure for 15 hours, and obtained the polyamic acid 370g of logarithmic viscosity 0.82dl / g. Dissolve 30 g of the obtained polyamic acid in 570 g of N-methyl-2-pyrrolidone, add 23.4 g of pyridine and 18.1 g of acetic anhydride and ...

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Abstract

The invention is to provide a liquid crystal aligning agent for a liquid crystal display device to obtain a liquid crystal alignment layer having excellent burning characteristics even when not only an ITO but a reflective electrode is used, and to provide a liquid crystal display device having a liquid crystal alignment layer obtained from the agent. The liquid crystal aligning agent comprises 100 parts by weight of a polymer having an amic acid repeating unit and an imide repeating unit, with the proportion of the amic acid repeating unit by 40 to 60% by weight in the entire repeating units, and at least 5 parts by weight of a compound having at least two epoxy groups in the molecule.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent. More specifically, it is related with the favorable liquid crystal aligning agent of sintering characteristic regardless of the kind of electrode which comprises a liquid crystal display element. Background technique [0002] In the past, people have known a TN-type liquid crystal display element with a TN (Twisted Nematic) type liquid crystal cell. In the TN-type liquid crystal cell, two substrates with a transparent conductive film inserted and a liquid crystal alignment film formed on the surface are formed. An element having a nematic liquid crystal layer with a positive conductivity anisotropy to form a laminated structure, and the long axis of the above-mentioned liquid crystal molecules is continuously twisted by 90 degrees from one substrate to the other substrate. [0003] In addition, there is also an STN (Super Twisted Nematic) type liquid crystal display element in which the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133
CPCC09K19/56G02F1/133711G02F1/133723
Inventor 夏井亨黑田美彦西川通则
Owner JSR CORPORATIOON
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