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Liquid crystal alignment agent, method for forming liquid crystal alignment film, and liquid crystal display element

A liquid crystal alignment agent, a technology for liquid crystal alignment, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problem of not having UV resistance, and achieve good pretilt angle performance, display quality is not deteriorated, and high UV resistance sexual effect

Active Publication Date: 2015-08-05
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the existing known liquid crystal alignment film materials, there is no ultraviolet resistance that can adapt to the current use situation, and the improvement of the ultraviolet resistance of the liquid crystal alignment film is desired.

Method used

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  • Liquid crystal alignment agent, method for forming liquid crystal alignment film, and liquid crystal display element
  • Liquid crystal alignment agent, method for forming liquid crystal alignment film, and liquid crystal display element
  • Liquid crystal alignment agent, method for forming liquid crystal alignment film, and liquid crystal display element

Examples

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example

[0199] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited by these examples.

[0200] Hereinafter, the weight average molecular weight of polyorganosiloxane and the solution viscosity of polyamic acid were measured by the following method.

[0201] [Weight average molecular weight]

[0202] The weight-average molecular weight of polyorganosiloxane was determined based on the results of gel permeation chromatography under the following conditions using the following apparatus, and obtained a polystyrene-equivalent value using monodisperse polystyrene as a standard substance.

[0203] Measuring device: manufactured by Tosoh Corporation, model "8120-GPC"

[0204] Column: manufactured by Tosoh Corporation, "TSKgelGRCXLII"

[0205] Solvent: THF

[0206] Sample concentration: 5% by weight

[0207] Sample injection volume: 100μL

[0208] Column temperature: 40°C

[0209] Column pressure: 68kgf / cm ...

Synthetic example A-1

[0214] 13.9 g of oxalic acid and 19.5 g of ethanol were put into a reaction container equipped with a stirrer, a thermometer, a dropping funnel, and a reflux condenser, and stirred to prepare an ethanol solution of oxalic acid. Next, this solution was heated to 70 degreeC in nitrogen atmosphere, and the mixture containing 15.1 g of tetraethoxysilanes and 1.6 g of vinyltriethoxysilanes was dripped at this as a raw material silane compound. After completion|finish of dripping, the temperature of 70 degreeC was maintained for 6 hours, and polycondensation reaction was performed. After completion of the reaction, it was cooled to 25° C., and 40.0 g of butyl cellosolve was added to obtain a solution containing polyorganosiloxane (A-1) as polyorganosiloxane (I).

[0215] The weight average molecular weight Mw of the polyorganosiloxane (A-1) contained in this solution was 12,000.

[0216] Synthesis Example A-2 to Synthesis Example A-10

[0217] In the above-mentioned synthesis exam...

Synthetic example G-1

[0245] 99 g of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane as a raw material silane compound and 99 g of methylisomethoxysilane as a solvent were charged into a reaction vessel equipped with a stirrer, a thermometer, a dropping funnel, and a reflux condenser. 500 g of butyl ketone and 10 g of triethylamine as a catalyst were mixed at room temperature. Next, after 100 g of deionized water was dripped there over 30 minutes using the dropping funnel, reaction was performed for 6 hours while stirring under reflux at 80°C. After the reaction, the organic layer was taken out, washed with a 0.2% by weight aqueous solution of ammonium nitrate until the washed water became neutral, and then the solvent and water were distilled off under reduced pressure to obtain a viscous transparent liquid. Polyorganosiloxane containing epoxy groups.

[0246] For the epoxy-containing polyorganosiloxane 1 As a result of the H-NMR analysis, a peak based on the epoxy group was obtained at around chem...

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Abstract

The present invention provides a liquid crystal alignment agent, a forming method for a liquid crystal alignment film, and a liquid crystal display device. The liquid crystal alignment film manufactured by the liquid crystal alignment agent may be irradiated with polarized or non-polarized ultraviolet light, exhibits a good pretilt angle, and is high in UV resistance. The liquid crystal alignment agent is characterized by comprising (I) polyorganosiloxane containing a group of a polymerizable double bond and (II) polyorganosiloxane containing a group of a cinnamic acid structure, or comprising (III) polyorganosiloxane containing the group of the polymerizable double bond and the group of the cinnamic acid structure.

Description

technical field [0001] The invention relates to a liquid crystal alignment agent. In particular, it relates to a liquid crystal alignment agent capable of producing a liquid crystal alignment film capable of exhibiting a favorable pretilt angle by irradiation of polarized or non-polarized ultraviolet rays and having high ultraviolet resistance. Background technique [0002] As a liquid crystal display element, in addition to using Twisted Nematic (Twisted Nematic, TN) type, Super Twisted Nematic (Super Twisted Nematic, STN) type, In Plane Switching (In Plane Switching, IPS) type, etc. In addition to liquid crystal display elements in the horizontal alignment mode of nematic liquid crystals with negative dielectric anisotropy, vertical alignment (Vertical Alignment) in homeotropic alignment mode using nematic liquid crystals with negative dielectric anisotropy is also known. Alignment, VA) type liquid crystal display element. [0003] Such a liquid crystal display element i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56G02F1/1337C08G77/38
CPCC08G77/04C08G77/20C08L83/04C08L2201/10C09K19/56G02F1/1337
Inventor 马场美智子中田正一铃木敬一秋池利之片桐宽徳久博昭
Owner JSR CORPORATIOON
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