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

A technology of liquid crystal aligning agent and liquid crystal aligning film, applied in the directions of liquid crystal materials, instruments, optics, etc., can solve the problems of unknown materials, and achieve the effect of excellent long-term reliability and less degradation of display quality

Active Publication Date: 2017-03-01
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] As such, in the prior art, there is a trade-off relationship between good liquid crystal orientation and high rubbing resistance, and materials that combine these properties at a level suitable for practical use are not yet known.

Method used

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  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0178] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples.

[0179] The imidation rate of the imidation polymer of the polyamic acid in the synthesis example described below was measured as follows.

[0180] [Imidation rate of imidized polymer]

[0181] The imidized polymer solution obtained in each synthesis example was poured into pure water, and the obtained precipitate was fully dried under reduced pressure at room temperature, dissolved in deuterated dimethyl sulfoxide, and tetramethylsilane was used as Standard substance, measured at room temperature 1 H-nuclear magnetic resonance (Nuclear Magnetic Resonance, NMR). according to income 1 In the H-NMR spectrum, the imidization rate [%] was obtained from the following formula (1).

[0182] Imidization rate[%]=(1-A 1 / A 2 ×α)×100 (1)

[0183] (In formula (1), A 1 is the peak area of ​​protons derived from NH groups that appear near the chemica...

Synthetic example 1

[0185] Synthesis Example 1 (Synthesis of Polyamic Acid)

[0186] 196 g of 1,2,3,4-cyclobutanetetracarboxylic dianhydride as tetracarboxylic dianhydride and 200 g of 4,4-oxydiphenylamine as diamine were dissolved in N-methyl-2-pyrrolidone ( NMP) 2,244 g, reacted at room temperature for 6 hours. Then, the reaction mixture was poured into a large excess of methanol to precipitate the reaction product. After the recovered deposit was washed with methanol, it was dried at 40° C. for 15 hours under reduced pressure to obtain 336 g of polyamic acid (PA-1).

Synthetic example 2

[0187] Synthesis Example 2 (Synthesis of imidized polymer of polyamic acid)

[0188] 224 g of 2,3,5-tricarboxycyclopentylacetic dianhydride as tetracarboxylic dianhydride and 108 g of p-phenylenediamine as diamine were dissolved in 2,988 g of NMP, and reacted at 60° C. for 4 hours to obtain Polyamic acid solution. Then, 320 g of NMP3 was added to the obtained polyamic-acid solution, and 395 g of pyridine and 305 g of acetic anhydride were added, and dehydration ring-closure reaction was performed at 110 degreeC for 4 hours. After the dehydration ring closure reaction, the solvent in the system was replaced with fresh NMP to obtain a solution containing 15% by weight of the imidized polymer (PI-1) having an imidization rate of 88%.

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Abstract

The present invention relates to a liquid crystal orientating agent, a liquid crystal orientating film and a liquid crystal display device. The present invention provides a liquid crystal orientating agent which can provide a liquid crystal orientating film having high level, heat resistance and liquid orientation. The liquid crystal orientating agent of the present invention is characterized by containing a polymer (A) and a compound (B) represented by the following formula (B). In the formula (B), two X1s respectively represent a monovalent organic group containing the group selected from a group having an epoxy ethyl structure, a group having an oxa-cyclobutyl structure and a group having a (methyl)acryloyloxy; and X2 represents a divalent organic group containing alkylene.

Description

technical field [0001] The invention relates to a liquid crystal aligning agent. Specifically, this invention relates to the liquid crystal aligning agent which forms the liquid crystal aligning film which has favorable liquid-crystal orientation and high rubbing resistance at a high level. Background technique [0002] In liquid crystal display elements, various driving methods with different electrode structures, physical properties of liquid crystal molecules used, and manufacturing processes have been developed, such as known twisted nematic (Twisted Nematic, TN) type, super twisted nematic (Super twisted nematic) -Twisted Nematic (STN) type, Vertical Alignment (VA) type, Multi-domain Vertical Alignment (MVA) type, In-Plane Switching (IPS) type, fringe field switching ( Fringe Field Switching (FFS) type, Polymer-Sustained Alignment (PSA) type and other liquid crystal display elements. [0003] These liquid crystal display elements are equipped with a liquid crystal ali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56G02F1/1337G02F1/1333
CPCC08G73/10C09K19/56G02F1/133711
Inventor 角谷宪一秋池利之黑田美彦樫下幸志
Owner JSR CORPORATIOON
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