Liquid crystal aligning agent for retardation film, liquid crystal alignment film for retardation film, and retardation film and process for production thereof

A technology of retardation film and liquid crystal aligning agent, which is applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems that the thermal stability of the photosensitive polymer layer cannot fully meet the requirements, large irradiation dose, etc., and achieve excellent liquid crystal Excellent effects of orientation and thermal stability, high productivity, and excellent liquid crystal orientation and thermal stability

Active Publication Date: 2012-02-01
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polarized light irradiation requires a large amount of irradiation, and the thermal stability of the photosensitive polymer layer is not sufficient

Method used

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  • Liquid crystal aligning agent for retardation film, liquid crystal alignment film for retardation film, and retardation film and process for production thereof
  • Liquid crystal aligning agent for retardation film, liquid crystal alignment film for retardation film, and retardation film and process for production thereof
  • Liquid crystal aligning agent for retardation film, liquid crystal alignment film for retardation film, and retardation film and process for production thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0362]

[0363] As described above, the liquid crystal aligning agent for phase difference films of the present invention contains [A] photo-alignment polyorganosiloxane as an essential component, and may contain suitable components and other optional components as needed. The [D] solvent and / or [E] solvent of the component is prepared as a solution-like composition. As a solvent used at the time of preparation of this liquid crystal aligning agent, the above-mentioned other solvent can also be used suitably.

[0364] The solvent used in the preparation of this liquid crystal aligning agent does not precipitate each component contained in the liquid crystal aligning agent at the following preferred solid content concentration, and the surface tension of the liquid crystal aligning agent is in the range of 25mN / m to 40mN / m.

[0365] The solid content concentration of the liquid crystal aligning agent of the present invention, that is, the ratio of the mass of all components o...

Synthetic example 1

[0400] 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 (ECETS), 500 g of methyl iso Butyl ketone and 10.0 g of triethylamine were mixed at room temperature. Next, after adding 100 g of deionized water dropwise from the dropping funnel over 30 minutes, it was reacted at 80° C. for 6 hours while mixing under reflux. After the reaction, the organic layer was taken out, washed with 0.2% by mass 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, as Viscous transparent liquid.

[0401] The polyorganosiloxane with epoxy group is carried out 1 In 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 occurred in the epoxy group during ...

Synthetic example 2

[0405] In a 500 mL three-necked flask with a condenser, mix 20 g of 4-bromodiphenyl ether, 0.18 g of palladium acetate, 0.98 g of tris(2-tolyl)phosphine, 32.4 g of triethylamine, and 135 mL of dimethylacetamide . Next, 7 g of acrylic acid was added to the mixed solution through a syringe and stirred. This mixed solution was further heated and stirred at 120° C. for 3 hours. After confirming the completion of the reaction by TLC (thin layer chromatography), the reaction solution was cooled to room temperature. After the precipitate was filtered, the filtrate was poured into 300 mL of 1N hydrochloric acid aqueous solution, and the precipitate was recovered. These precipitates were recrystallized from a 1:1 (mass ratio) solution of ethyl acetate and hexane to obtain 8.4 g of a compound represented by the following formula (K-1) (specific cinnamic acid derivative (K-1)).

[0406]

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Abstract

The invention relates to a liquid crystal aligning agent for a retardation film, a liquid crystal alignment film for a retardation film, and a retardation film and a process for production thereof. The invention aims at providing a liquid crystal aligning agent capable of forming a liquid crystal alignment film for a retardation film, a retardation film provided with a liquid crystal alignment film for the retardation film and excellent liquid crystal alignment performance and thermal stability, and a manufacture method for the retardation film, the liquid crystal aligning agent can be in light alignment even few radioactive rays illuminate, and no heating procedure is needed during and after illumination. The invention is a liquid crystal aligning agent for a retardation film comprising [A] polysiloxane provided with a light alignment group. The light alignment group is preferably a group provided with a cinnamic acid structure.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent for a retardation film, a liquid crystal aligning film for a retardation film, a retardation film and a manufacturing method thereof. Background technique [0002] Liquid crystal displays (LCDs) are widely used in televisions and various monitors. As display elements of LCDs, for example, STN (Super Twisted Nematic) type, TN (Twisted Nematic) type, IPS (In-Plane Switching) type, VA (Vertical Alignment) type, PSA (Polymer Sustained Alignment) type, etc. are known. (Refer to Patent Documents 1 and 2). Various optical materials are used in this liquid crystal display element. Among them, retardation films are used for the purpose of eliminating coloring of the display and the viewing angle dependence of changing the display color and contrast depending on the viewing angle (see Patent Document 3 and 4). [0003] Currently, retardation films are manufactured by stretching plastic films, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56G02F1/1337G02F1/1335G02B5/30
CPCC08J5/18C08L83/06C08L83/08G02B5/30
Inventor 永尾隆安田博幸
Owner JSR CORPORATIOON
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