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Liquid crystal alignment 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, which can solve the problems of dust generation, static electricity generation, and uniform rubbing of liquid crystal alignment films.

Active Publication Date: 2021-02-19
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 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 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
Comparison scheme
Effect test

preparation example Construction

[0258] [Preparation of polymer composition]

[0259]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 a photosensitive side chain type polymer capable of expressing liquid crystallinity as already described. 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.

[0260] In the polymer composition of this embodiment, all of the above-mentioned resin components may be the above-mentioned photosensitive side chain type polymers capable of expressing liquid crystallin...

Embodiment

[0329] Abbreviations used in Examples are as follows.

[0330]

[0331]

[0332]

[0333]

[0334] MA1 was synthesized with reference to Macromolecules 2007, 40, 6355-6360.

[0335] PLC1 used a commercially available product.

[0336] As PLC2, commercially available LC242 (BASF Corporation) was used.

[0337] PLC4 was synthesized by the synthesis method described in the patent document (Japanese Patent Application Laid-Open No. 9-118717).

[0338] PLC5 is a novel compound that has not been disclosed in literature or the like. PLC5 was synthesized using PLC4 and PLC5-1, and will be described in detail in "" below. It should be noted that PLC5-1 was synthesized by the synthesis method described in literature (LiquidCrystals (2005), 32(8), 1031-1044.).

[0339] As PLC6, commercially available M6BC (manufactured by Midori Chemical Co., Ltd.) was used.

[0340]

[0341] Add compound PLC4 (20.00g, 65.3mmol), compound PLC5-1 (14.09g, 71.8mmol), EDC (15.02g, 78.4mmol)...

Embodiment 2

[0363]To 10.0 g of the liquid crystal aligning agent B1 obtained in Synthesis Example 1, 0.10 g (25% by mass relative to the solid content) of the liquid crystal compound PLC1 obtained in Synthesis Example 1 was added, stirred and dissolved at room temperature for 3 hours, and a liquid crystal was prepared. Alignment agent B3.

[0364] The obtained liquid crystal aligning agent B3 was stored in a freezer for one day, and no precipitate was confirmed after thawing.

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Abstract

The present invention relates to a polymer composition comprising: (A) a photosensitive side chain type polymer exhibiting liquid crystallinity in a predetermined temperature range; (B) a reactive mesogenic compound; and (C) an organic solvent . ADVANTAGE OF THE INVENTION According to this invention, the liquid crystal aligning film which is provided with highly efficient orientation control ability and excellent in image sticking characteristics, the polymer composition which obtains this liquid crystal aligning film, and the transverse electric field drive type liquid crystal display element are provided.

Description

technical field [0001] 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 [0002] Liquid crystal display devices are known as light, thin and low power consumption display devices, and in recent years they have been used in large televisions and the like, 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. And, in a liquid crystal display element, an organic film formed of an organic material is used as a liquid crystal aligning film so that liquid crystal can exhibit a desired orientation state between substrates. [0003] That is, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L101/12C08K5/10G02F1/1337
CPCC08K5/10C08L101/12G02F1/1337C09K19/56G02F1/133711
Inventor 名木达哉
Owner NISSAN CHEM IND LTD
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