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

A liquid crystal performance technology, applied in the field of new polymer compositions, can solve problems such as static electricity, dust generation, and inability to achieve liquid crystal orientation

Active Publication Date: 2017-08-29
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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 the electrodes on the corresponding substrate or the 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 alignment agent, liquid crystal alignment film, and liquid crystal display element
  • Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display element
  • Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display element

Examples

Experimental program
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Effect test

preparation example Construction

[0291] [Preparation of polymer composition]

[0292] The polymer composition used in the present invention is preferably prepared as 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 by using the above-mentioned (A) component, (B) component, and the above-mentioned solvent and / or compound for improving film thickness uniformity and surface smoothness, and for improving liquid crystal. A solution obtained by dissolving an adhesive compound for an alignment film and a substrate, etc., in an organic solvent. Here, the total content of (A) component and (B) becomes like this. Preferably it is 1 mass % - 20 mass %, More preferably, it is 3 mass % - 15 mass %, Especially preferably, it is 3 mass % - 10 mass %.

[0293] In the polymer composition of the present embodiment, in addition to the (A) component and the (B) component, other polymers may be mixed within a ra...

Embodiment

[0362] Abbreviations used in Examples are as follows.

[0363]

[0364]

[0365] MA1 was synthesized by the synthesis method described in the patent document (WO2011-084546).

[0366] MA2 was synthesized by the synthesis method described in the patent document (Japanese Patent Laid-Open No. 9-118717).

[0367] HBAGE was purchased from Nippon Chemical Corporation.

[0368] A1 was synthesized by the synthesis method described in the patent document (WO2014-054785).

[0369]

[0370] ISO: Isophorone diisocyanate

[0371] DI-1: Isophorone diisocyanate

[0372] DI-2: Diphenylmethane-4,4’-diisocyanate

[0373] DI-3: 1,4-phenylisocyanate

[0374] DI-4: Toluene-2,4-diisocyanate

[0375]

[0376] DDM: 4,4'-Diaminodiphenylmethane

[0377] Me-4APhA: N-methyl-2-(4-aminophenyl)ethylamine

[0378] Me-DADPA: 4,4'-Diaminodiphenyl(N-methyl)amine

[0379] DA-2MG: 1,3-bis(4-aminophenoxy)ethane

[0380] BAPU: 1,3-bis[2-(4-aminophenyl)ethyl]urea

[0381] p-PDA: p-phenylenediami...

Synthetic example 1

[0397] MA1 (5.3g) and MA2 (19.6g) were melt|dissolved in THF (101.3g), and after degassing using a diaphragm pump, AIBN (0.39g) was added and degassed again. Then, it was made to react at 60 degreeC for 8 hours, and the polymer solution of the methacrylate was obtained. This polymer solution was added dropwise to methanol (600 ml), and the resulting precipitate was collected by filtration. This deposit was wash|cleaned with methanol, and it dried under reduced pressure in 40 degreeC oven, and obtained the methacrylate polymer powder MP1.

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Abstract

The present invention provides a novel polymer composition whereby alignment control performance is imparted at high efficiency, and whereby a liquid crystal alignment film for an in-plane switching liquid crystal display element having excellent image persistence characteristics is provided, and a liquid crystal alignment film for an in-plane switching liquid crystal display element using the same. The present invention relates to a polymer composition containing (A) a photosensitive side-chain polymer expressing liquid crystal properties in a predetermined temperature range, (B) a polymer produced using two or more types of diamine compounds and at least one species selected from a diisocyanate component and a tetracarboxylic acid derivative, and (C) an organic solvent. The present invention also relates to a method for producing a substrate having a liquid crystal alignment film, the method having a step for applying the composition to a substrate having an electroconductive film for in-plane switching and forming a coating film, a step for irradiating the resultant coating film with polarized ultraviolet rays, and a step for heating the resultant coating film.

Description

technical field [0001] The present invention relates to a novel polymer composition (liquid crystal aligning agent), a liquid crystal aligning film for a transverse electric field-driven liquid crystal display element using the same, and a method for producing a substrate having the aligning film. More specifically, it relates to a new method for producing a liquid crystal display element excellent in image sticking characteristics. Background technique [0002] 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 example, by sandwiching a liquid crystal layer between a pair of transparent substrates provided with electrodes. Also, in a liquid crystal display element, an organic film containing an organic materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/02C08L101/12G02F1/1337
CPCC08L75/02C08L101/12G02F1/1337C08G73/1007C08G73/1035C09K19/56G02F1/133788G02F1/134363
Inventor 名木达哉别府功一朗根木隆之
Owner NISSAN CHEM IND LTD
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