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Liquid crystal alignment agent and liquid crystal display element

A technology of liquid crystal display element and liquid crystal aligning agent, which is applied in the directions of liquid crystal materials, optics, instruments, etc., can solve the problems of deterioration, large light and heat tolerance, etc., and achieves reduction in manufacturing cost, excellent reliability, and voltage retention rate. The effect of falling less

Active Publication Date: 2018-06-15
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] On the other hand, in liquid crystal display elements for liquid crystal projectors that have been increasingly demanded as home theaters in recent years, light sources with very high irradiation intensity such as metal halide lamps are used, so the resistance to light and heat become a big problem
In addition, in order to improve the visibility under sunlight including strong ultraviolet rays, liquid crystal display elements for mobile devices such as mobile phones or for car navigation in vehicles must increase the brightness of the backlight, so there is further concern about premature deterioration

Method used

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  • Liquid crystal alignment agent and liquid crystal display element
  • Liquid crystal alignment agent and liquid crystal display element
  • Liquid crystal alignment agent and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0162]

[0163] In the following synthesis examples, the synthesis operation of each polymer was repeated as necessary on the scale described below, thereby securing the required amount of polymers in the subsequent synthesis examples.

Synthetic example 1

[0165] The inside of a 500mL three-necked flask equipped with a three-way cock (three-way cock) and a stirrer equipped with a nitrogen gas introduction tube was set as a nitrogen atmosphere, and 20.00g (0.125mol) of 2,6-dihydroxynaphthalene was added thereto. Di-μ-hydroxy-bis[(N,N,N',N'-tetramethylethylenediamine)copper(II)] 0.58g (0.125mmol) and 2-methoxyethanol 380mL and then started stirring. Then, after adding 13.7 g of 31 wt % hydrogen peroxide water over 2 hours, it reacted at 25 degreeC with stirring for 3 hours. After completion of the reaction, the reaction solution was poured into 1,000 mL of distilled water to precipitate the product. The obtained precipitate was collected by filtration and recovered, and the solvent was removed overnight at 80° C. under vacuum, thereby obtaining a gray powdery polymer (A-1) (having the following formula (A-1) polymer of the indicated repeat unit) (yield 18.76 g, 95% yield).

[0166] [chemical 8]

[0167]

[0168] The polystyr...

Synthetic example 2

[0173] According to Scheme 1 below, a polymer (polymer (A-4)) having a repeating unit represented by formula (A-4) was synthesized.

[0174] [chemical 9]

[0175]

[0176] In a 500 mL eggplant-shaped flask, after dissolving 3.80 g of sodium hydroxide in 250 g of distilled water, 6.00 g of the polymer (A-1) obtained in Synthesis Example 1 was added and dissolved, and heated at room temperature (about 25° C. ) under stirring to obtain the sodium salt of the polymer (A-1). A solution obtained by dissolving 13.8 g of allyl bromide in 30 mL of ethanol was added dropwise thereto over 30 minutes at room temperature. After completion of the dropwise addition, reaction was carried out for 12 hours at room temperature with stirring. After the reaction was completed, the suspension-like reaction solution was suction-filtered to recover a solid. After washing the obtained solid with distilled water, vacuum drying was carried out at 50° C. to obtain 7.6 g of a polymer (polymer (A-4))...

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Abstract

The invention provides a liquid crystal alignment agent and a liquid crystal display element. The liquid crystal aligning agent contains a polyarylene group. The polyarylene is preferably a polymer having a repeating unit represented by the following formula (P). The liquid crystal aligning agent of the present invention can form a liquid crystal aligning film with little drop in voltage retention over a long period of time, no afterimage even under severe use conditions, and excellent reliability, and has excellent coatability (printability) .

Description

technical field [0001] The invention relates to a liquid crystal alignment agent and a liquid crystal display element. Specifically, the present invention relates to a liquid crystal aligning film that can be formed with little drop in voltage retention over a long period of time, does not produce afterimages even under severe use conditions, and has excellent reliability, and has excellent coating properties (printing properties). properties) excellent liquid crystal aligning agent. Background technique [0002] Liquid crystal display elements can be classified into various modes according to the electrode structure and the physical properties of the liquid crystal molecules used. For example, liquid crystal display devices of the following types and the like are known: [0003] For example, the so-called twisted nematic (Twisted Nematic, TN) type, that is, a liquid crystal alignment film is formed on the surface of a substrate provided with a transparent conductive film ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56G02F1/1337
Inventor 宇野高明岩泽晴生远藤彩子杉山文隆秋池利之
Owner JSR CORPORATIOON
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