Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display

A liquid crystal alignment agent and a technology for liquid crystal alignment, which are applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of liquid crystal displays such as uneven dot-like hue, uneven alignment of drip marks, and inability to uniformly disperse monomers. , to achieve good display quality, avoid uneven diffusion, and fast response.

Inactive Publication Date: 2017-03-22
DAXIN MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the liquid crystal drop method (One Drop Fill, ODF) that is commonly used to fill the liquid crystal layer today, the monomers are usually not uniformly dispersed on the alignment film, resulting in uneven alignment of the so-called drop marks, which will cause the liquid crystal The monitor produces drop mura

Method used

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  • Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display
  • Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display
  • Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0069] The synthesis method of the compound represented by the aforementioned formula 6 is as follows.

[0070] 1-fluoro-2,4-dinitrobenzene (1-fluoro-2,4-dinitrobenzene, DNFB) (102.36g) and tetrahydrofuran (tetrahydrofuran, THF) (500ml) were mixed in a 1000ml round bottom bottle, at this time Appears as a yellow clear liquid. Next, under continuous stirring with a magnet, slowly add 1-phenylpiperazine (1-phenylpiperazine, PP) (81.12 g) using an addition funnel, at this time, the yellow clear liquid gradually turns into an orange-red liquid and is accompanied by the precipitation of an orange-yellow solid . After the feeding was completed, the external temperature was raised to 80° C. using an oil bath, and the internal temperature was 65° C. and reflux was carried out for 6 hours while stirring continuously. After returning to temperature, the orange liquid was slowly dropped into isopropanol (IPA) (1500ml) to precipitate and wash off excess starting material and impurities....

Synthetic example 2

[0075] The synthesis method of the compound represented by the aforementioned formula 7 is as follows.

[0076]

[0077] Synthesis of compound (b):

[0078] Methyl 3,5-dinitrobenzoate (MDNBA) (1.1eq, 248.75g) and compound (a) (1.0eq, 244.38g) were put into a 3L reactor. Next, under a nitrogen atmosphere, THF (1038.02 g) was added to dissolve MDNBA and compound (a), and then mechanically stirred for 10 minutes at a stirring speed of 200 rpm. After that, N,N'-dicyclohexylcarbodiimide (N,N'-Dicyclohexylcarbodiimide, DCC, CAS=538-75-0) (1.1eq, 226.96g) was added, and the reaction kettle was washed with THF (129.75g) wall. At this point, the solution gradually turned from a clear state to a white turbid state. Next, stirring was carried out for 10 minutes, so that the solution was uniformly white and turbid. After the uniform white turbidity appeared, 4-dimethylaminopyridine (4-dimethylaminopyridine, DMAP, CAS=1122-58-3) (0.1eq, 12.22g) was dissolved in THF (129.75g), and th...

Synthetic example 3

[0083] The synthesis method of the compound represented by the aforementioned formula 8 is as follows.

[0084]

[0085] Synthesis of compound (d):

[0086] Compound (d) was synthesized in the same steps as compound (b), and compound (c) was used instead of compound (a) as a synthetic raw material to obtain white compound (d) (yield: 96%).

[0087] The synthesis of the compound shown in formula 8:

[0088] In a 3L reactor, compound (d) (259.51g) was dissolved in THF (1341.14g), and 5% palladium-carbon catalyst (Pd / C) (12.98g) was added. Next, under the continuous stirring of the obtained mixture by a mechanical stirrer (stirring speed is 200rpm), hydrazine (hydrazine, N 2 h 4 ) (259.51g) was slowly dripped at a rate of about 0.05g / s, and the temperature was raised to about 60 degrees. After the dropwise addition of hydrazine was completed, the stirring reaction was continued for 8 hours. At this point, the solution will turn from a light yellow clear solution to a colo...

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Abstract

A liquid crystal aligning agent includes a polymer and a solvent. The polymer is obtained by reacting a diamine component with a tetracarboxylic dianhydride component, wherein the diamine component comprises a compound represented by Formula 1 and the tetracarboxylic dianhydride component comprises a compound represented by Formula 2: X is a single bond, -O-, -COO- or -OCO-, A and B are each independently phenylene, cyclohexylene or piperazinyl, R is -H or -CH and R is -H or C -C alkyl.

Description

technical field [0001] The present invention relates to a liquid crystal alignment agent, a liquid crystal alignment film and a liquid crystal display element, and in particular to a liquid crystal alignment agent suitable for a polymer stable alignment type liquid crystal display element, made of the liquid crystal alignment agent A liquid crystal alignment film and a liquid crystal display element having the liquid crystal alignment film. Background technique [0002] Liquid crystal displays have the advantages of small size, light weight, low power consumption, and good display quality, and have become the mainstream of flat-panel displays in recent years. As the display specifications of liquid crystal displays continue to develop towards larger sizes, the market's requirements for high contrast ratio (High Contrast Ratio), fast response, and wide viewing angle of liquid crystal displays are gradually increasing. In order to overcome the problem of the viewing angle of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56G02F1/1337C08G73/10
CPCG02F1/133723C09K19/56C08G73/1078
Inventor 王柏扬王耀群蔡明睿
Owner DAXIN MATERIALS
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