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

A liquid crystal and display technology, applied in the field of polymers, can solve problems such as dust generation, static electricity, and even rubbing of liquid crystal alignment films

Active Publication Date: 2019-03-01
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, liquid crystal display element, and novel monomer
  • Liquid crystal alignment agent, liquid crystal alignment film, liquid crystal display element, and novel monomer
  • Liquid crystal alignment agent, liquid crystal alignment film, liquid crystal display element, and novel monomer

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0377] [Preparation of polymer composition]

[0378] The polymer composition used in the present invention is preferably prepared as a coating liquid in a manner 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 the above-mentioned component (A) and the above-mentioned solvent for improving film thickness uniformity and surface smoothness, compounds, A compound etc. for improving the adhesiveness of a liquid crystal aligning film and a board|substrate. Here, content of (A) component 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 %.

[0379] In the polymer composition of this embodiment, other polymers other than the component (A) may be mixed within a range not impairing liquid crystal expressiveness and photosensitivity. In this case, content of othe...

Embodiment

[0439] Examples are given below to describe the present invention in more detail, but the present invention is not limited thereto.

[0440] The structure of the (meth)acrylate compound used in the Example is shown below.

[0441]

[0442]

[0443] MA-1 was synthesized by the synthesis method described in the patent document (WO2011-084546).

[0444] MA-2 was synthesized by the synthesis method described in the patent document (Japanese Patent Laid-Open No. 9-118717).

[0445] MA-3 was synthesized by the same synthesis method as MA-2.

[0446] MA-4 to MA-8 are novel compounds not disclosed in literature etc., and the synthesis method will be described in detail below.

[0447] MA-9 was synthesized by the synthesis method described in the patent document (Japanese Patent Laid-Open No. 2006-308878).

[0448] The products described in the following synthesis examples 1 to 5 were obtained by 1 H-NMR analysis and identification (analysis conditions are as follows).

[044...

Synthetic example 1MA-4

[0452]

[0453]

[0454]

[0455]In tetrahydrofuran (393.5g), put ethyl 4-bromobenzoate (78.7g, 344mmol), diethylamine (125.8g), 5-hexyn-1-ol (43.8g) and copper iodide (2.6g ), after forming a nitrogen atmosphere, bis(triphenylphosphine)palladium dichloride (4.8 g) was added, and the mixture was reacted at 60° C. for 7 hours. After the reaction was completed, 3.9 g of activated carbon (brand: JapanEnviroChemicals, Limited, specially made Bailu dry product) was added, stirred at room temperature for 1 hour, and then the activated carbon was removed by filtration. Next, tetrahydrofuran was removed by concentration under reduced pressure, diluted with ethyl acetate, and washed three times with pure water. Add 3.9 g of activated carbon (brand: Japan EnviroChemicals, Limited), a special dried egret product, to the resulting organic phase, stir at room temperature for 1 hour, filter, and concentrate under reduced pressure to obtain 103 g of MA-4A (crude yield: 122 %, traits:...

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Abstract

Provided are a novel polymer composition for obtaining a liquid crystal alignment film, a liquid crystal alignment film which uses the same, and a novel monomer. The present invention provides a polymer composition containing (A) a photosensitive-side-chain-type polymer exhibiting liquid crystal properties in a predetermined temperature range, and (B) an organic solvent, wherein the polymer composition is characterized in that a resin as component (A) contains a side chain represented by formula (a). (In formula (a): L is a C1-16 straight-chain or branched-chain alkylene; X represents CH2-CH2,CH=CH, or C C; Y1 each independently represents a phenylene group or the like; Y2 represents -COOH, -CR3=CR4-COOH, -CR5=CR6-CO-O-Y3, or -O-CO-CR5=CR6-Y3; R3, R4, R5, and R6 each independently represents a hydrogen atom or a methyl group, and Y3 represents a phenyl group or the like.)

Description

technical field [0001] The present invention relates to a novel polymer having a specific structural unit, a composition containing it (liquid crystal aligning agent), a liquid crystal aligning film for a transverse electric field-driven liquid crystal display element using the same, and manufacture of a substrate having the aligning film method. 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...

Claims

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Application Information

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IPC IPC(8): G02F1/1337C08F12/12C08F18/00C08F20/10C08F34/00
CPCC08F12/12C08F18/00C08F20/10C08F34/00G02F1/1337C08F16/38C08L101/02
Inventor 藤枝司森内正人
Owner NISSAN CHEM IND LTD
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