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

A monomer and composition technology, applied in the field of liquid crystal display elements, can solve the problems of low solubility and difficult application of liquid crystal alignment agents, etc., and achieve the effect of excellent tilt angle characteristics

Active Publication Date: 2021-10-15
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solubility of this copolymer is low, and when forming a varnish, it is necessary to use a solvent such as chloroform, which cannot be used industrially, and it is difficult to apply it as a liquid crystal aligning agent.

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

[0152] [Preparation of liquid crystal aligning agent]

[0153] It is preferable to prepare the liquid crystal aligning agent used for this invention as a coating liquid so that it may become suitable for formation of a liquid crystal aligning film. That is, it is preferable to prepare the liquid crystal aligning agent used by this invention as the solution which melt|dissolved the resin component for forming a resin film in an organic solvent. Here, the resin component refers to a resin component containing the side chain type polymer as the (A) component explained above. 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.

[0154] In the liquid crystal aligning agent of this invention, all the said resin components may be side chain type polymers which are (A) component, and other polymers other than these may be mixed in the range which does no...

Embodiment

[0226] Abbreviations used in Examples are as follows.

[0227]

[0228]

[0229] MA-1 was synthesized by the synthesis method described in the non-patent literature (Macromolecules 2002, 35, 706-713).

[0230] MA-2 was synthesized using the synthesis method described in British Patent GB2306470B.

[0231] MA-3 was synthesized by the synthesis method described in the non-patent literature (Macromolecules 2007, 40, 6355-6360).

[0232] MA-4 was synthesized by the synthesis method described in the pamphlet of International Patent Application Publication WO2014 / 054785.

[0233] MA-5 was synthesized by the synthesis method described in the patent document (Japanese Patent Application Laid-Open No. 9-118717).

[0234] MA-6 was purchased and used by Tokyo Chemical Industry Co., Ltd.

[0235] MA-7 was purchased and used by Tokyo Chemical Industry Co., Ltd.

[0236] MA-8 was purchased and used by Tokyo Chemical Industry Co., Ltd.

[0237] MA-9 was purchased and used by Sigma ...

Synthetic example 1

[0249]

[0250] After dissolving MA-1 (21 g: 40 mmol) and MA-2 (26 g: 60 mmol) in THF (270 g) and degassing with a diaphragm pump, AIBN (0.5 g: 3 mmol) was added and degassed again. Then, it was made to react at 60 degreeC for 6 hours, and the polymer solution of the methacrylate was obtained. This polymer solution was added dropwise to methanol (2000 ml), and the resulting precipitate was filtered. This precipitate was washed with methanol, and dried under reduced pressure to obtain methacrylate polymer powder P1.

[0251] Under the conditions shown in Table 1, methacrylate polymer powders P2 and P3 were produced by the method similar to the synthesis example 1 also about the synthesis examples 2 and 3.

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Abstract

The present invention relates to a polymer composition comprising (A) a copolymer obtained from a monomer mixture comprising the following monomer (A-1) and monomer (A-2). Here, the monomer (A-1) refers to a monomer having one cinnamoyl moiety and 2 to 4 benzene rings not constituting the cinnamoyl moiety, and having a polymerizable group, and the monomer (A-2) It refers to a monomer having one cinnamoyl moiety and one benzene ring not constituting the cinnamoyl moiety and having a polymerizable group (the cinnamoyl moiety and the benzene ring may have substituents). Further the present invention relates to a method for manufacturing a substrate with a liquid crystal alignment film, which comprises the steps of: coating the composition on a substrate with a conductive film driven by a transverse electric field to form a coating film; a step of irradiating polarized ultraviolet rays; and a step of heating the obtained coating film. The liquid crystal aligning agent using the polymer composition of this invention can provide orientation control ability efficiently, it is excellent in afterimage characteristics, and can provide a transverse electric field drive type liquid crystal display element.

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. Furthermore, it is related with the novel method for manufacturing the liquid crystal display element excellent in tilt-angle characteristic. 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. Also, in the liquid crystal display element, an organic film formed of an organic material is used as a liquid crystal alignment film so that the liquid crystal exhibits a desired alignment state between substrates. [0003] That i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L101/06C08F220/30C08L33/04G02F1/1337
CPCC08L33/04C08L101/06G02F1/1337C08F220/303C08L33/06C08F220/302G02F1/133711
Inventor 永井健太郎铃木加名子名木达哉藤枝司
Owner NISSAN CHEM IND LTD
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