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

A technology of liquid crystal alignment agent and carbon number, which is applied in the direction of instruments, optics, nonlinear optics, etc., and can solve the problem of large radiation dose

Active Publication Date: 2011-12-07
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the conventional photo-alignment film can obtain a large pretilt angle, there is a problem that the amount of radiation required is large.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0225] Synthesis Example 1 (Synthesis of Compound (A-1-2-1))

[0226] Compound (A-1-2-1) was synthesized according to the following Synthetic Scheme 1.

[0227]

[0228] Synthetic route 1

[0229] Add 82g of p-hydroxycinnamic acid, 304g of potassium carbonate and 400ml of N-methyl-2-pyrrolidone in a 1L eggplant-shaped flask. After stirring for 1 hour at room temperature, add 166g of 1-bromopentane and stir at 100°C for 5 Hour. Then, the solvent was distilled off under reduced pressure. Then add 48g of sodium hydroxide and 400ml of water therein, and reflux for 3 hours to carry out the hydrolysis reaction. After the reaction, the reaction system was neutralized with hydrochloric acid, and the resulting precipitate was recovered and recrystallized with ethanol to obtain 80 g of white crystals of a compound represented by the following formula (A-1-2-1).

Synthetic example 2

[0230] Synthesis Example 2 (Synthesis of Compound (A-1-2-2))

[0231] In the above synthesis example 1, except that 262 g of 1-iodo-4,4,4-trifluorobutane was used instead of 1-bromopentane, the same procedure was carried out as in synthesis example 2 to obtain 85 g of the following formula (A-1- 2-2) White powder of the compound (compound (A-1-2-2)).

[0232]

Synthetic example 3

[0233] Synthesis Example 3 (Synthesis of Compound (A-1-4-1))

[0234] Compound (A-1-4-1) was synthesized according to the following Synthetic Scheme 2.

[0235]

[0236] Synthetic route 2

[0237] (Synthesis of compound (A-1-4-1A))

[0238] Add 91.3g methyl 4-hydroxybenzoate, 182.4g potassium carbonate and 320ml N-methyl-2-pyrrolidone to a 1L eggplant-shaped flask, stir at room temperature for 1 hour, then add 99.7g 1-bromopentane , and stirred at 100° C. for 5 hours to react. After the reaction, reprecipitation was performed with water. Then, 48 g of sodium hydroxide and 400 ml of water were added to the precipitate, and the hydrolysis reaction was carried out by refluxing for 3 hours. After completion of the reaction, it was neutralized with hydrochloric acid, and the resulting precipitate was recrystallized with ethanol to obtain 102 g of white crystals of compound (A-1-4-1A).

[0239] (Synthesis of compound (A-1-4-1))

[0240] 52 g of this compound (A-1-4-1A) wa...

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Abstract

The present invention relates to a polymer containing (A) at least one polymer selected from the group consisting of polyamic acid and polyimide and (B) having a cross-linking reaction or isomerization reaction through light with a wavelength of 200-400 nm. A liquid crystal aligning agent that is a compound of photosensitive groups and epoxy groups. The said liquid crystal aligning agent can be used for formation of the liquid crystal aligning film which can produce liquid crystal aligning ability by irradiating polarized light or a non-polarized ray, without performing a grinding process.

Description

technical field [0001] The invention relates to a liquid crystal aligning agent, a liquid crystal aligning film, a forming method thereof, and a liquid crystal display element. More specifically, it relates to a liquid crystal aligning agent that can be used in the formation of a liquid crystal aligning film that can produce liquid crystal aligning ability by irradiating polarized or non-polarized rays without grinding treatment; A method for forming a liquid crystal alignment film, and a liquid crystal display element with excellent display quality. 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 ° made of TN (twisted nematic) type, STN (super twisted nematic) type, IPS (in-plane switching) t...

Claims

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Application Information

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IPC IPC(8): G02F1/1337C08G59/32C08G59/40C08L63/00C08L79/08
CPCC08L63/00G02F1/133788C08G73/10G02F1/133723
Inventor 秋池利之熊谷勉
Owner JSR CORPORATIOON
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