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Polymer composition and liquid crystal alignment film for in-plane-switching-type liquid crystal display element

A composition and polymer technology, applied in polyurea/polyurethane coatings, coatings, instruments, etc., can solve problems such as inability to achieve liquid crystal alignment, dust generation, and inability to evenly rub liquid crystal alignment films

Active Publication Date: 2016-04-20
NISSAN CHEM IND LTD +1
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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 impossible to rub the surface of the liquid crystal alignment film uniformly with a cloth, and it is impossible to achieve a uniform liquid crystal. orientation

Method used

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  • Polymer composition and liquid crystal alignment film for in-plane-switching-type liquid crystal display element
  • Polymer composition and liquid crystal alignment film for in-plane-switching-type liquid crystal display element
  • Polymer composition and liquid crystal alignment film for in-plane-switching-type liquid crystal display element

Examples

Experimental program
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Effect test

preparation example Construction

[0300] [Preparation of polymer composition]

[0301] It is preferable to prepare the polymer composition used for this invention in the form of a coating liquid, and to suitably form 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.

[0302] 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, and may be ...

Embodiment

[0435] Abbreviations used in Examples are as follows.

[0436]

[0437]

[0438] MA1 was synthesized by the synthesis method described in the patent document (WO2011-084546).

[0439] MA2 was synthesized by the synthesis method described in the patent document (Japanese Patent Laid-Open No. 9-118717).

[0440]

[0441] ISO1: Toluene-2,4-diisocyanate

[0442] ISO2: Isophorone diisocyanate

[0443]

[0444] Me-4APhA: N-methyl-2-(4-aminophenyl)ethylamine

[0445] DA-1MG: bis(4-aminophenoxy)methane

[0446] DA-2MG: 1,2-bis(4-aminophenoxy)ethane

[0447] DA-3MG: 1,3-bis(4-aminophenoxy)propane

[0448] BAPU: 1,3-bis[2-(4-aminophenyl)ethyl]urea

[0449] p-PDA: p-phenylenediamine

[0450] DDM: 4,4'-Diaminodiphenylmethane

[0451] 3AMPDA: 3,5-diamino-N-(pyridin-3-ylmethyl)benzamide

[0452] DADPA: 4,4’-Diaminodiphenylamine

[0453] Me-DADPA: 4,4'-Diaminodiphenyl(N-methyl)amine

[0454]

[0455]

[0456] CBDA: 1,2,3,...

Synthetic example 1

[0469]

[0470] MA1 (2.99 g, 9.0 mmol) and MA2 (1.83 g, 6.0 mmol) were dissolved in THF (44.57 g), and after degassing with a diaphragm pump, AIBN (0.12 g, 0.5 mmol) was added and degassed again. Then, it was made to react at 50 degreeC for 30 hours, and the polymer solution of the methacrylate was obtained. This polymer solution was added dropwise to diethyl ether (500 ml), and the resulting precipitate was filtered. This deposit was wash|cleaned with diethyl ether, and it dried under reduced pressure in the oven of 40 degreeC, and obtained the methacrylate polymer powder.

[0471] NMP36.0g was added to the obtained powder 4.0g, and it stirred at room temperature for 3 hours. A methacrylate polymer solution (M1) having a solid content concentration of 10.0% by weight was obtained. The polymer was completely dissolved at the end of stirring.

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Abstract

The present invention addresses the problem of providing a novel polymer composition for obtaining a liquid crystal alignment film for an in-plane-switching-type liquid crystal display element, the polymer composition having excellent image persistence characteristics and imparting alignment control performance with high efficiency, and a liquid crystal alignment film for an in-plane-switching-type liquid crystal display element that uses the polymer composition. The present invention solves the abovementioned problem by a polymer composition containing (A) a photosensitive side-chain macromolecule exhibiting liquid crystal properties in a predetermined temperature range, (B) polyurea, and (C) an organic solvent.

Description

technical field [0001] The present invention relates to a novel polymer composition, a liquid crystal alignment film for a transverse electric field-driven liquid crystal display element using the same, and a method for manufacturing a substrate having the alignment 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 material is used as a liquid crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C08J5/18C08L33/04C08L75/02
CPCC08G18/324C08G18/3243C08G18/755C08G18/7621C08L75/02C09D175/02G02F1/133711G02F1/133788G02F1/134363G02F1/133726
Inventor 金尔润后藤耕平根木隆之名木达哉川月喜弘近藤瑞穂
Owner NISSAN CHEM IND LTD
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