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Liquid crystal aligning agent and compound

A liquid crystal alignment agent and compound technology, applied in liquid crystal materials, organic chemistry, chemical instruments and methods, etc., can solve problems such as inhomogeneity of liquid crystal alignment ability, coating or printing properties, and inhomogeneity of mechanical properties. Achieve the effects of avoiding defects, excellent printability, and improved mechanical strength

Active Publication Date: 2014-02-12
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the film after crosslinking becomes an inhomogeneous film including a structural part derived from a polymer and a structural part derived from a linking part of a crosslinking agent, so that nonuniformity in liquid crystal alignment ability and mechanical properties (such as Defects such as unevenness in heat resistance, etc.)
Furthermore, since the liquid crystal alignment agent itself contains multiple components with different structures at the same time, the stability of the composition as a solution is impaired, and problems may arise in coating or printing properties.

Method used

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  • Liquid crystal aligning agent and compound
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  • Liquid crystal aligning agent and compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0239]

Synthetic example A-1

[0241] Compound (A-1) was synthesized according to Scheme 1 below.

[0242] [chemical 7]

[0243]

[0244] In a 2L three-necked flask equipped with a reflux tube, mix 218.12g of pyromellitic dianhydride, 266.2g of L-aspartic acid, and 1,000mL of pyridine, stir at 45°C for 2 hours, and then reflux for 4 hours. reaction. After the reaction, the solvent was removed by distillation under reduced pressure to obtain 448 g of compound (A-1).

Synthetic example A-2

[0246] Compound (A-2) was synthesized according to Scheme 2 below.

[0247] [chemical 8]

[0248]

[0249] In a 2L three-necked flask equipped with a reflux tube, 224.17 g of 2,3,5-tricarboxycyclopentylacetic dianhydride, 274.28 g of 4-carboxyaniline, and 1,000 mL of pyridine were mixed, stirred at 45° C. for 2 hours, and then The reaction was carried out under reflux for 4 hours. After the reaction, the solvent was removed by distillation under reduced pressure to obtain a solid, and the obtained solid was recrystallized with ethanol to obtain 431 g of a compound (A-2).

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Abstract

The invention provides a liquid crystal aligning agent and a compound, wherein the liquid crystal aligning agent can provide a crystal aligning film which can maintain the mixing effect of a cross-linking agent and have good uniform performance and have good stability and printing performance as a compound. The liquid crystal aligning agent is characterized in that the liquid crystal aligning agent has (A) at least one group of (Alpha1)free carboxyl, oxygen heterocyclic propyl, oxygen heterocyclic butyl, hydroxyl, thiol group, amino group and (meth) acrylic acid base, and (Alpha2) at least one imide ring, and a compound with below 1000 molecular weight; and (B) polymers.

Description

technical field [0001] The invention relates to a liquid crystal alignment agent and a compound. In detail, the present invention relates to a liquid crystal alignment agent containing a polymer and a cross-linking agent, which has properties beyond those of well-known liquid crystal alignment agents. Background technique [0002] The liquid crystal display element is provided with a liquid crystal alignment film which has a function of aligning liquid crystal molecules in a certain direction. The liquid crystal alignment film is usually formed by coating a liquid crystal alignment agent containing a polymer on a substrate. As the polymer contained in the liquid crystal alignment agent, polyamic acid, imidized polymer of polyamic acid, polyamide, polyester, polyorganosiloxane (polyorganosiloxane) etc. are known, especially polyamic acid, Since the partially imidized polymer and polyorganosiloxane have both solubility and electrical properties, they can be preferably used a...

Claims

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Application Information

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IPC IPC(8): C09K19/56C07D487/04C07D471/08G02F1/1337G02F1/1333C08G73/10
CPCC08G73/10C08L79/08C08L101/02C09K19/56G02F1/133711
Inventor 樫下幸志片桐宽加藤孝人
Owner JSR CORPORATIOON
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