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Liquid crystal aligning agent, liquid crystal display device, and polyorganosiloxane

A technology of polyorganosiloxane and liquid crystal alignment agent, which is applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of insufficient electrical properties such as voltage retention rate and afterimage performance, and achieve excellent and excellent liquid crystal alignment performance The effect of excellent electrical performance, voltage retention rate and afterimage performance

Active Publication Date: 2010-06-09
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is known that if the conventionally known liquid crystal aligning film is applied to a high-speed responsive liquid crystal, there are insufficient electrical properties such as voltage retention and afterimage performance, which is a serious problem.

Method used

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  • Liquid crystal aligning agent, liquid crystal display device, and polyorganosiloxane
  • Liquid crystal aligning agent, liquid crystal display device, and polyorganosiloxane
  • Liquid crystal aligning agent, liquid crystal display device, and polyorganosiloxane

Examples

Experimental program
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Effect test

preparation example Construction

[0132] When the above-mentioned poor solvent is used in conjunction with the organic solvent during the preparation of polyamic acid, its use ratio can be set appropriately within the range where the polyamic acid produced does not precipitate, and is preferably 50% by weight of all solvents. % or less, more preferably 20% by weight or less.

[0133] As mentioned above, the reaction solution which melt|dissolved polyamic acid can be obtained. This reaction solution may be directly supplied to the preparation of a liquid crystal aligning agent, or the polyamic acid contained in the reaction solution may be separated and then supplied to the preparation of a liquid crystal aligning agent, or the separated polyamic acid may be purified and then Preparation of liquid crystal aligning agent is provided. The separation of polyamic acid can be carried out by pouring the above-mentioned reaction solution into a large amount of poor solvent to obtain a precipitate, and then drying the...

Synthetic example 1

[0252] In the reaction vessel equipped with stirrer, thermometer, dropping funnel and reflux condenser, add 3-acryloyloxypropyltrimethoxysilane 50g, 2-(3,4-epoxycyclohexyl)ethyl 50 g of trimethoxysilane, 500 g of methyl isobutyl ketone, and 10 g of triethylamine were mixed at room temperature. Then, after adding 100 g of deionized water dropwise through the dropping funnel over 30 minutes, the reaction was carried out at 80° C. for 6 hours while stirring under reflux. After the reaction, the organic layer was taken, washed with 0.2% by weight of ammonium nitrate aqueous solution until the washed water was neutral, and the solvent and water were distilled off under reduced pressure to obtain polyorganosiloxane (APS- 1) Viscous transparent liquid.

[0253] The weight average molecular weight Mw of this acryloyl group-containing polyorganosiloxane (APS-1) was 2,000.

Synthetic example 2

[0255] Except that the raw material silane compound was 80 g of 3-acryloyloxypropyltrimethoxysilane and 20 g of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, the same procedure was carried out as in Synthesis Example 1 above, A viscous transparent liquid of polyorganosiloxane (APS-2) having acryloyl groups was obtained.

[0256] The weight average molecular weight Mw of this acryloyl group-containing polyorganosiloxane (APS-2) was 1900.

[0257]

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Abstract

The invention relates to a liquid crystal aligning agent, a liquid crystal display device, and a polyorganosiloxane. A liquid crystal aligning agent capable of forming a liquid crystal aligning film with great liquid crystal aligning performance, exhibiting great electrical performance, and especially great voltage holding rate and afterimage characteristic. The liquid crystal aligning agent contains a special polysiloxane containing a group having steroid skeleton and a group represented by the following formula (1A): -(AII)a-X-R. In the formula (1A), R is an alkyl group optionally substituted by fluorine having 4-20 carbon atoms, AII is a cyclohexylene group or a phenylene group, X is a single bond, an oxygen atom, a sulphur atom, -COO- or -OCO-, a is an integer from 0 to 3. When a plurality of AII exist, they can be identical to each other, or different from each other.

Description

technical field [0001] The invention relates to a liquid crystal alignment agent, a liquid crystal display element, a polyorganosiloxane liquid crystal alignment agent and a liquid crystal display element. More specifically, it relates to a liquid crystal aligning agent capable of forming a liquid crystal aligning film excellent in liquid crystal orientation and electrical properties, and excellent printability, and a liquid crystal display element excellent in display quality. Background technique [0002] As a liquid crystal display element, so far, a TN type liquid crystal display element with a TN type (twisted nematic) liquid crystal cell is known, and a liquid crystal alignment film is formed on a substrate surface provided with a transparent conductive film, as a substrate for a liquid crystal display element, The two substrates are arranged opposite to each other, and a nematic liquid crystal layer with positive dielectric anisotropy is formed in the gap to form a ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56G02F1/1337C08G77/16C08G77/18C08G77/392
CPCC08G77/38C08L79/08C08L83/04C09K19/56G02F1/1337
Inventor 秋池利之
Owner JSR CORPORATIOON
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