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Liquid crystal aligning agent, forming liquid crystal aligning film, and liquid crystal display unit

A technology of liquid crystal aligning agent and polyorganosiloxane, which is applied in liquid crystal materials, chemical instruments and methods, optics and other directions to achieve the effect of excellent performance

Active Publication Date: 2014-03-05
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology, when applied to a liquid crystal display element with a VA-type liquid crystal cell, is an excellent technology that can easily and inexpensively form a liquid crystal alignment film with expected performance. When using the liquid crystal display element of the type liquid crystal cell, the liquid crystal orientation may not be called good enough

Method used

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  • Liquid crystal aligning agent, forming liquid crystal aligning film, and liquid crystal display unit
  • Liquid crystal aligning agent, forming liquid crystal aligning film, and liquid crystal display unit
  • Liquid crystal aligning agent, forming liquid crystal aligning film, and liquid crystal display unit

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example ES1

[0260] In the reaction vessel equipped with stirrer, thermometer, dropping funnel and reflux condenser, add 2-(3,4-epoxycyclohexyl) ethyltrimethoxysilane 100.0g, methyl isobutyl ketone 500g and 10.0 g of triethylamine were mixed at room temperature.

[0261] Then, after adding 100 g of deionized water dropwise through the dropping funnel over 30 minutes, it was allowed to react at 80° C. for 6 hours while mixing under reflux. After the reaction, the organic layer was taken out, 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 with epoxy groups. Alkanes (ES-1) viscous transparent liquid.

[0262] The polyorganosiloxane with epoxy group is carried out 1 In the H-NMR analysis, a peak due to the epoxy group of theoretical intensity was obtained around chemical shift (δ) = 3.2 ppm, and it was confirmed that no side reaction of the epo...

Synthetic example ES2

[0264] Synthesis example ES2~3

[0265] Viscous transparent liquids of epoxy group-containing polyorganosiloxanes (ES-2) and (ES-3) were obtained in the same manner as in Synthesis Example 1, except that the raw materials charged were as shown in Table 1.

[0266] The Mw and epoxy equivalent weight of these polyorganosiloxanes having epoxy groups are listed in Table 1.

[0267] In addition, in Table 1, the abbreviations of the raw material silane compounds have the following meanings, respectively.

[0268] ECETS: 2-(3,4-Epoxycyclohexyl)ethyltrimethoxysilane

[0269] MTMS: Methyltrimethoxysilane

[0270] PTMS: Phenyltrimethoxysilane

[0271] Table 1

[0272]

[0273]

[0274] As described in the following synthesis examples A1-1 to A1-4, compounds represented by the following formulas (A1-1) to (A1-4) (hereinafter respectively referred to as "compound (A1-1)", "compound (A1-2)", "Compound (A1-3)", and "Compound (A1-4)").

[0275]

Synthetic example A1-1

[0277] In a 500ml three-necked flask equipped with a condenser, add 20g of 4-bromodiphenyl ether, 0.18g of palladium acetate, 0.98g of tris(2-tolyl)phosphine, 32.4g of triethylamine and 135ml of dimethylacetamide and mixed to form a solution. Then, 7 g of acrylic acid was added to the above solution with a syringe and stirred, and then stirred at 120° C. for 3 hours to perform a reaction. After confirming the completion of the reaction by thin layer chromatography (TLC), the reaction solution was cooled to room temperature. After filtering the insoluble matter, the filtrate was poured into 300 ml of 1N hydrochloric acid, and the precipitate was recovered. This precipitate was recrystallized in a mixed solvent of ethyl acetate and hexane (ethyl acetate:hexane=1:1 (volume ratio)), to obtain 8.4 g of compound (A1-1).

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Abstract

This invention relates to a liquid crystal aligning agent, a liquid crystal aligning film and liquid crystal display device. A liquid crystal aligning agent of said liquid crystal aligning film with excellent liquid crystal aligning property and electrical property, etcs. is formed by means of providing a light aligning method having less light exposure. Said liquid crystal aligning agent contains radiation sensitivity organopolysiloxane that is represented by specific groups indicated by followed formal, where asterisk indicates a chemical bond . The liquid crystal aligning agent of this invention is suit for a liquid crystal display unit with TN type,STN type or IPS type liquid crystal cell, especially a liquid crystal display unit with IPS type liquid crystal cell.

Description

technical field [0001] The invention relates to a liquid crystal aligning agent, a liquid crystal aligning film and a liquid crystal display element. Background technique [0002] So far, it is known that a nematic liquid crystal having positive dielectric anisotropy is sandwiched between substrates with transparent electrodes having a liquid crystal alignment film, and the long axes of liquid crystal molecules are continuously twisted between the substrates as required. 0~360° TN type (twisted nematic) and STN (super twisted nematic) type, IPS (in-plane switching) type in which electrodes are only formed on one side of the substrate and an electric field is applied in a direction parallel to the substrate, with a negative Liquid crystal display elements of various liquid crystal cells such as VA (vertical alignment) type of nematic liquid crystal with dielectric anisotropy (see Patent Documents 1 to 4). A liquid crystal display device having an IPS type liquid crystal cell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38C09K19/56G02F1/1337
CPCC08L83/04
Inventor 安田博幸永尾隆秋池利之角谷宪一
Owner JSR CORPORATIOON
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