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Eepoxy group-containing compound, liquid crystal aligning agent and preparation method and application thereof

A technology of epoxy-based compounds and liquid crystal alignment agents, applied in chemical instruments and methods, liquid crystal materials, organic chemistry, etc., can solve problems such as insufficient reliability and low voltage retention rate, and achieve good stability and high voltage retention rate , the effect of high hardness

Active Publication Date: 2022-02-08
POME TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the requirements of current liquid crystal display elements, how to improve the rubbing twill, insufficient reliability, and low voltage retention of liquid crystal alignment films has become one of the goals to be solved urgently by those skilled in the art.

Method used

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  • Eepoxy group-containing compound, liquid crystal aligning agent and preparation method and application thereof
  • Eepoxy group-containing compound, liquid crystal aligning agent and preparation method and application thereof
  • Eepoxy group-containing compound, liquid crystal aligning agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example

[0114] Preparation of Polymer A

[0115] The molecular weight of gained polyamic acid in the following synthesis examples all obtains according to GPC method measurement (Shimadzu Corporation, gel permeation chromatography), and mobile phase is N-methylpyrrolidone, and gained molecular weight is weight-average molecular weight (M w )

Synthetic example 1

[0117] Put 21.72g (0.05mol) of diamine b-1-11 and 5.41g (0.05mol) of p-PDA into a three-necked flask with nitrogen protection, add NMP 208g and mix, and then add TDA 15.01g (0.05mol) ), CBDA 9.81g (0.05mol). React at room temperature for 24 hours. After the reaction is completed, NMP and BC are added to form a solution of 5% by weight, 55% by weight of NMP, and 40% by weight of BC to obtain polyamic acid solution A-1, and the molecular weight of GPC is M w It is 67098g / mol.

Synthetic example 2

[0119] Put 21.72g (0.05mol) of diamine b-1-11 and 5.41g (0.05mol) of p-PDA into a three-necked flask with nitrogen protection, add NMP 191g and mix, and then add CBDA 9.81g (0.05mol) ), PMDA 10.91 g (0.05 mol). React at room temperature for 24 hours. After the reaction is completed, NMP and BC are added to prepare a solution of 5% by weight, 55% by weight of NMP and 40% by weight of BC, to obtain polyamic acid solution A-2, and the molecular weight of M is determined by GPC. w It is 65455g / mol.

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Abstract

The invention relates to the technical field of liquid crystal alignment materials, and particularly discloses an epoxy group-containing compound, a liquid crystal aligning agent and a preparation method and application thereof. The liquid crystal aligning agent comprises a polymer A, an epoxy group-containing compound and a solvent C, wherein the polymer A is obtained by reacting a tetracarboxylic dianhydride compound a and a diamine compound b, and the tetracarboxylic dianhydride compound a comprises at least one tetracarboxylic dianhydride compound; the epoxy group-containing compound has a structure represented by general formula (1): in the general formula (1), R1 represents an alkylene group having 1 to 6 carbon atoms; R2, R3 and R4 are respectively and independently hydrogen atoms, methyl, ethyl, propyl, butyl, amyl and phenyl. The liquid crystal aligning film prepared from the liquid crystal aligning agent is good in friction resistance. The liquid crystal display device prepared from the liquid crystal aligning agent has high voltage holding ratio, good pre-tilt angle stability and high reliability.

Description

technical field [0001] The present application relates to the technical field of liquid crystal alignment materials, more specifically, it relates to an epoxy group-containing compound, a liquid crystal alignment agent and a preparation method and application thereof. Background technique [0002] In recent years, since people's requirements for wide viewing angle characteristics of liquid crystal displays have increased year by year, the requirements for electrical characteristics or display characteristics of wide viewing angle liquid crystal display elements have become increasingly stringent. Among all kinds of wide viewing angle liquid crystal display elements, the vertical alignment type (Vertical Alignment) liquid crystal display element with liquid crystal alignment film is commonly used, and in order to have better electrical properties and display characteristics, the liquid crystal alignment film has also become a vertical alignment type One of the important resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D405/14C09K19/56G02F1/1337C08J5/18C08L79/08
CPCC07D405/14C09K19/56G02F1/133723C08J5/18C08J2379/08Y02P20/55
Inventor 张翠红李铭新王华森苏永兵
Owner POME TECH CO LTD
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