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

A technology of liquid crystal alignment agent and coating film, which is applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of insufficient control of liquid crystal molecular orientation, and achieve the effect of excellent balance and low price

Inactive Publication Date: 2015-10-07
JSR CORPORATIOON +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the liquid crystal alignment film in the liquid crystal display element of the above-mentioned transverse electric field method is generally formed by a rubbing method, so there is the above-mentioned problem, and the application of the photo-alignment method is being studied.
But, when forming the liquid crystal aligning film that is applicable to the liquid crystal display element of this transverse electric field mode by photo-alignment method, it has been pointed out that the alignment control force of liquid crystal molecules is insufficient, so it is necessary to improve

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0253] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples.

[0254] The weight-average molecular weights Mw in the following synthesis examples are polystyrene-equivalent values ​​measured by gel permeation chromatography under the following conditions, respectively.

[0255] Column: manufactured by Tosoh Corporation, TSKgel GRCXLII

[0256] Solvent: THF

[0257] Temperature: 40°C

[0258] Pressure: 68kgf / cm 2

[0259]

Synthetic example ES-1

[0261] In a reaction vessel with a stirrer, a thermometer, a dropping funnel, and a reflux condenser, add 100.0 g of 2-(3,4-epoxycyclohexyl) ethyltrimethoxysilane as a raw material silane compound, 500 g of methyl isobutyl ketone and 10.0 g of triethylamine as a catalyst were mixed at room temperature.

[0262] Next, 100 g of deionized water was dropped from the dropping funnel over 30 minutes, mixed under reflux, and reacted at 80° C. for 6 hours. After the reaction is over, take out the organic layer, use 0.2% by weight of ammonium nitrate aqueous solution to wash it until the water after washing is neutral, then distill off the solvent and water under reduced pressure to obtain a viscous transparent liquid having epoxy groups polyorganosiloxane (ES-1).

[0263] The polyorganosiloxane with epoxy group is carried out 1 As a result of H-NMR analysis, an epoxy group-based peak with the same theoretical intensity was obtained around chemical shift (δ) = 3.2 ppm, thereby confir...

Synthetic example ES-2

[0265] Synthesis Example ES-2 and ES-3

[0266] Except that the added raw materials were as shown in Table 1, polyorganosiloxanes (ES-2) and (ES-3) having epoxy groups were obtained as viscous transparent liquids in the same manner as in Synthesis Example ES-1. .

[0267] Table 1 shows the Mw and epoxy equivalent of these epoxy group-containing polyorganosiloxanes.

[0268] In addition, in Table 1, the abbreviations of the raw material silane compounds have the following meanings, respectively.

[0269] ECETS: 2-(3,4-Epoxycyclohexyl)ethyltrimethoxysilane

[0270] MTMS: Methyltrimethoxysilane

[0271] PTMS: Phenyltrimethoxysilane

[0272] Table 1. Synthesis of polyorganosiloxanes with epoxy groups

[0273]

[0274]

[0275] According to the following synthetic route 1, the compound represented by the above-mentioned formula (A-1) (hereinafter referred to as "compound (A-1)") and the compound represented by the above-mentioned formula (A-2) (hereinafter referred to as ...

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Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal aligning agent that gives a liquid crystal alignment layer, to which alignment regulation force on liquid crystal molecules can be imparted by a photo-aligning method, and which shows an excellent balance in vertical alignment regulation force and coating properties when the agent is applied to a vertical alignment type liquid crystal display element, and which shows excellent alignment regulation force when applied to a TN (twisted nematic) type, STN (super twisted nematic) type or in-plane switching system liquid crystal display element. SOLUTION: The liquid crystal aligning agent contains a radiation-sensitive polymer having a structure expressed by formula (A'). COPYRIGHT: (C)2012,JPO&INPIT

Description

technical field [0001] The invention relates to a liquid crystal alignment agent, a method for forming a liquid crystal alignment film and a liquid crystal display element. More specifically, it is related with the liquid crystal aligning agent which can provide the excellent liquid crystal aligning film of the orientation control force of a liquid crystal molecule, and the liquid crystal display element with excellent display quality. Background technique [0002] In a liquid crystal display element, in order to align liquid crystal molecules in a certain direction with respect to the surface of the substrate, a liquid crystal alignment film is provided on the surface of the substrate. The liquid crystal aligning film is generally formed by rubbing in the same direction the surface of the organic film formed on the surface of the substrate with cloth such as rayon (rubbing method). However, the formation of the liquid crystal alignment film by rubbing is easy to generate d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56C08J5/18G02F1/1337G02F1/1333
CPCC08G77/14C08G77/38C08L79/08C08L83/04C09K19/56G02F1/133723
Inventor 德久博昭西川通则阿部翼永尾隆杉山文隆坂本昌巳
Owner JSR CORPORATIOON
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