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Liquid crystal aligning agent, liquid crystal alignment film, and liquid crystal display element

A technology of liquid crystallinity and performance, applied in the field of new polymer compositions, can solve the problems of dust generation, static electricity generation, uniform rubbing of liquid crystal alignment films, etc., and achieve the effect of excellent tilt angle characteristics

Pending Publication Date: 2021-09-28
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the brushing method of rubbing the surface of a liquid crystal alignment film made of polyimide or the like has problems of generating dust and static electricity.
In addition, due to the high-definition of liquid crystal display elements in recent years, the unevenness caused by electrodes on the corresponding substrate or switching active elements for liquid crystal driving, it is sometimes impossible to rub the surface of the liquid crystal alignment film evenly with a cloth, and it is impossible to achieve uniformity. Liquid crystal orientation

Method used

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  • Liquid crystal aligning agent, liquid crystal alignment film, and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal alignment film, and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal alignment film, and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0293] [Preparation of polymer composition]

[0294] The polymer composition used in the present invention is preferably prepared in the form of a coating liquid so as to be suitable for forming a liquid crystal aligning film. That is, the polymer composition used in the present invention is preferably prepared in the form of a solution in which a resin component for forming a resin coating is dissolved in an organic solvent. Here, the resin component refers to a resin component containing the above-mentioned photosensitive side chain type polymer capable of expressing liquid crystallinity. In this case, the content of the resin component is preferably 1% by mass to 20% by mass, more preferably 3% by mass to 15% by mass, particularly preferably 3% by mass to 10% by mass.

[0295]In the polymer composition of this embodiment, the above-mentioned resin components may all be the above-mentioned photosensitive side chain polymers capable of exhibiting liquid crystallinity, but th...

Embodiment

[0355] Abbreviations used in Examples are as follows.

[0356]

[0357] (Photoreactive Side Chain Monomer / Liquid Crystalline Side Chain Monomer)

[0358]

[0359] (monomer having a vertical alignment group (a component that imparts a tilt angle))

[0360]

[0361]

[0362]

[0363]

[0364] 4-bromo-4'-hydroxybiphenyl [MA1-1] (150g, 0.60mol), tert-butyl acrylate [MA1-2] (162g, 1.3mol), palladium acetate (2.7g, 12mmol), three ( o-Tolyl)phosphine (7.3g, 24mmol), tributylamine (334g, 1.8mol), and N,N-dimethylacetamide (750g) were added to a 3L four-necked flask, and heated and stirred at 100°C. After the reaction was tracked by HPLC and the completion of the reaction was confirmed, the reaction solution was cooled to around room temperature, and then poured into 1.8 L of 1M hydrochloric acid aqueous solution. Ethyl acetate (1 L) was added thereto, and the aqueous layer was removed by liquid separation. The organic layer was washed twice with 1 L of 10% aqueous h...

Synthetic example 1

[0390]

[0391]MA1 (20.4g, 50.0mmol), MA2 (15.3g, 50.0mmol), Side1 (3.0g, 30.0mmol) were dissolved in NMP (277.0g), and after degassing and nitrogen replacement with a diaphragm pump, AIBN ( 0.82g, 5.0mmol) and degassed and replaced with nitrogen again. Then, it was made to react at 60 degreeC for 24 hours, and the polymer solution of the methacrylate was obtained. This polymer solution was added dropwise to methanol (5000 ml), and the resulting precipitate was filtered. This deposit was wash|cleaned with methanol, and it dried under reduced pressure in the oven of 40 degreeC, and obtained the methacrylate polymer powder P1. The number average molecular weight of the obtained methacrylate polymer was 25,000, and the weight average molecular weight was 300,000.

[0392] NMP (114.0g) was added to the obtained methacrylic polymer powder (A1) (6.0g), and it stirred and melt|dissolved at room temperature for 5 hours. BCS (30.0g) was added to this solution, and it stirred at ro...

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Abstract

The invention relates to a liquid crystal aligning agent, a liquid crystal alignment film and a liquid crystal display element. Specifically, the present invention relates to a polymer composition containing: (A) a photosensitive side-chain polymer exhibiting liquid crystallinity in a specific temperature range, the side-chain polymer having a repeating unit containing a vertical alignment group; and (B) an organic solvent. According to the present invention, the liquid crystal alignment film to which alignment control ability is imparted with high efficiency and which has excellent tilt angle characteristics is provided, and a polymer composition, a twisted nematic liquid crystal display element and a vertical electric field liquid crystal display element which incorporate the liquid crystal alignment film are provided.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of July 29, 2016, an application number of 201680044830.1, and an invention title of "liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display element". technical field [0002] The present invention relates to a novel polymer composition, a liquid crystal alignment film using the same, and a method for producing a substrate having the alignment film. The present invention also relates to a novel method for manufacturing a liquid crystal display element excellent in tilt characteristics. Background technique [0003] Liquid crystal display devices are known as display devices that are light in weight, thin in cross-section, and low in power consumption. In recent years, they have been used in large-scale television applications, etc., and have achieved remarkable development. The liquid crystal display element is constituted, for examp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/06C09K19/38C09K19/56C09K19/54G02F1/1337
CPCC08L101/06C09K19/3852C09K19/56C09K19/542G02F1/1337G02F1/133703G02F1/133711C09K2323/02C09K2019/548C08F20/30C09K19/0208C09K19/3833C08F216/36C08F220/34C08F232/08C08F238/00G02F1/133788C08L101/02C08L101/12C08F220/302C08F220/303C08F220/346C08F220/301C09K2323/00G02F1/133726G02F1/133746G02F1/133757C08F220/32G02F2201/12G02F2202/023C08F220/30G02F1/133753
Inventor 名木达哉
Owner NISSAN CHEM IND LTD
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