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Liquid crystal aligning agent, liquid crystal display device and method for forming the same

A technology of liquid crystal alignment agent and polyorganosiloxane, which is applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve problems such as ODF unevenness and display unevenness, and achieve favorable product pass rate and excellent vertical orientation , the effect of excellent vertical orientation binding force

Active Publication Date: 2012-01-11
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, if the ODF method is used in the manufacture of conventionally known VA-type liquid crystal display elements with a liquid crystal alignment film, there may be a problem of display unevenness called "ODF unevenness".

Method used

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  • Liquid crystal aligning agent, liquid crystal display device and method for forming the same
  • Liquid crystal aligning agent, liquid crystal display device and method for forming the same
  • Liquid crystal aligning agent, liquid crystal display device and method for forming the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0496] The present invention will be further specifically described below through examples, wherein the present invention is not limited by these examples. In the following, the weight average molecular weight of the polyorganosiloxane polymer was evaluated by the following method.

[0497] [Weight average molecular weight]

[0498] The weight-average molecular weight of the polyorganosiloxane polymer was obtained from the results of gel permeation chromatography measurement under the following conditions using the following apparatus, and is a polystyrene-equivalent value using monodisperse polystyrene as a standard substance.

[0499] Measuring device: manufactured by Tosoh Corporation, model "8120-GPC"

[0500] Column: manufactured by Tosoh Corporation, "TSKgelGRCXLII"

[0501] Solvent: THF

[0502] Sample concentration: 5% by weight

[0503] Sample injection volume: 100μL

[0504] Column temperature: 40°C

[0505] Column pressure: 68kgf / cm 2

[0506]

Synthetic example A-1

[0508] In a reaction vessel equipped with a stirrer, a thermometer, a dropping funnel, and a reflux condenser, 13.9 g of oxalic acid and 19.5 g of ethanol were added and stirred to prepare an ethanol solution of oxalic acid. Then, the solution was heated to 70° C. under a nitrogen atmosphere, and a mixture of 15.1 g of tetraethoxysilane and 1.6 g of vinyltriethoxysilane as raw material silane compounds was added dropwise thereto. After the dropwise addition was completed, it was kept at a temperature of 70° C. for 6 hours, then cooled to 25° C., and then 40.0 g of butyl cellosolve was added to obtain a polyorganosiloxane (A) containing polyorganosiloxane ( A-1) solution.

[0509] The polyorganosiloxane (A-1) contained in this solution had a weight average molecular weight Mw of 12,000.

Synthetic example A-2～A-10

[0511] In the above-mentioned Synthesis Example A-1, the type and amount of the silane compound used as a raw material, and the amounts of oxalic acid and ethanol used are respectively set as described in 1 of Table 1, and the above-mentioned synthesis method is followed in addition. Solutions containing polyorganosiloxanes (A-2) to (A-10) as polyorganosiloxanes (A) were prepared in the same manner as in Example A-1.

[0512] In synthesis examples A-7 and A-8, two kinds of silane compounds (a2-3) were used.

[0513] The weight-average molecular weight Mw of each polyorganosiloxane contained in each solution is shown together in Table 1-1, and synthesis examples A-9 and A-10 are reference synthesis examples.

[0514]

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PUM

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Abstract

The invention relates to a liquid crystal aligning agent, a liquid crystal display device and a method for forming the same. The invention provides a liquid crystal aligning agent which can provide liquid crystal aligning films having excellent vertical alignment and meanwhile high ultraviolet ray preventing performances. The liquid crystal aligning agent is characterized by comprising polysiloxane. The polysiloxane comprises groups having polymer type carbon-to-carbon double bonds. The groups having polymer type carbon-to-carbon double bonds is represented by the groups in the formula (A). In formula (A), R is a hydrogen atom or a methyl, XI and XII are respectively 1, 4-phenylene, methylene, 1, 2-ethylidene, 1, 2-propylidene or 1, 3-propylidene. a, b, c and d are respectively 0 or 1. When c is 0 and d is 1, XII is 1, 4-phenylene. When b is 0, then d is 0.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent, a liquid crystal display element, and a method for manufacturing a liquid crystal display element. In more detail, it is related with the liquid crystal aligning agent which can provide the liquid crystal aligning film which has high ultraviolet-ray resistance excellent in vertical alignment property. Background technique [0002] As a liquid crystal display element, in addition to using a horizontal alignment mode liquid crystal display element of a nematic liquid crystal having a positive dielectric anisotropy represented by a TN (twisted nematic) type, an STN (super twisted nematic) type, etc., There is also known a VA (Vertical Alignment) type liquid crystal display element in a homeotropic (Vertical Alignment) alignment mode using a nematic liquid crystal having negative dielectric anisotropy. [0003] Such a liquid crystal display element includes a liquid crystal aligning film ha...

Claims

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Application Information

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IPC IPC(8): C09K19/56G02F1/1337
CPCC08G77/20C08K5/09C09K19/56G02F1/1337
Inventor 吉泽纯司角谷宪一清水成夫谏山纯片桐宽秋池利之
Owner JSR CORPORATIOON
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