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

A liquid crystal alignment agent and liquid crystal alignment technology, applied in liquid crystal materials, instruments, optics, etc., can solve the problems of lower yield and poor sealant leveling, and achieve improved yield and better sealant leveling. Effect

Inactive Publication Date: 2016-04-13
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid crystal alignment film has the problem of poor flattening of the frame glue, which reduces the yield of subsequent processing.
[0004] Therefore, how to solve the problem of poor flatness of the frame glue in the liquid crystal alignment film is one of the active research goals of those skilled in the art.

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

[0171]

[0172] The preparation method of the liquid crystal alignment agent of the present invention is not particularly limited, and can be prepared by a general mixing method. For example, first add the solvent (B) to the polymer (A) prepared in the above manner at a temperature of 0°C to 200°C, and optionally add the additive (C), and finally continue with the stirring device Stir until dissolved. In addition, it is more preferable to add the solvent (B) at a temperature of 20°C to 60°C.

[0173]

[0174] The method for forming a liquid crystal alignment film of the present invention includes the following steps: first, the liquid crystal alignment agent prepared above is coated by a roll coating method, a spin coating method, a printing method, an ink-jet method, etc. A pre-coating layer is formed on the surface of the substrate; then, the pre-coating layer is subjected to pre-bake treatment, post-bake treatment, and alignment treatment.

[0175] The purpose of the pre-bakin...

Synthetic example

[0196] The following describes the synthesis example A-1-1 to the synthesis example A-1-5 of the polymer (A), the synthesis example A-2-1 to the synthesis example A-2-10 and the comparative synthesis example A-3-1 to the comparison Synthesis Example A-3-6:

Synthetic example A-1-1

[0198] A nitrogen inlet, a stirrer, a condenser, and a thermometer were set on a four-necked flask with a volume of 500 ml, and nitrogen was introduced. Then, in a four-necked flask, 1.41 g (0.005 mol) of the diamine compound represented by formula (2-2) (abbreviated as b-1-1), 8.92 g (0.045 mol) of 4,4'- Diaminodiphenylmethane (abbreviated as b-2-1) and 80 grams of N-methyl-2-pyrrolidone (abbreviated as NMP) were stirred at room temperature until dissolved. Then, 41.03 grams (0.01 moles) of ethylene glycol bis(trimellitic anhydride) (abbreviated as a-1-1) and 8.96 grams (0.04 moles) of 2,3,5-tricarboxycyclopentylacetic dianhydride (abbreviated as It is a-2-1) and 20 grams of NMP, and reacted at room temperature for 2 hours. After the completion of the reaction, the reaction solution was poured into 1500 ml of water to precipitate the polymer. Then, the obtained polymer was filtered, washed with methanol and filtered three times, placed in a vacuum oven, and dried at a temper...

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PUM

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Abstract

The invention provides a liquid crystal alignment agent, liquid crystal alignment film and liquid crystal display element, wherein the liquid crystal alignment agent can form the liquid crystal alignment film with good frame glue flattening performance. The liquid crystal alignment agent includes a polymer (A) and a solvent (B), wherein the polymer (A) is obtained by reaction of a mixture including a tetracarboxylic dianhydride component (a) and a diamine component (b). The tetracarboxylic dianhydride component (a) includes at least one tetracarboxylic dianhydride compound (a-1) represented by Formula (1). The diamine component (b) includes at least one diamine compound (b-1) represented by Formula (2).

Description

Technical field [0001] The invention relates to a liquid crystal alignment agent, a liquid crystal alignment film and a liquid crystal display element, in particular to a liquid crystal alignment agent, a liquid crystal alignment film and a liquid crystal display element that can form a liquid crystal alignment film with good sealant flatness. Background technique [0002] In recent years, due to the increasing requirements for the display quality of liquid crystal displays, the quality and characteristics of liquid crystal alignment agents, such as liquid crystal alignment and ion density, have become more stringent than ever. Among them, when the ion density is too high, problems such as image sticking are likely to occur, and the display quality is seriously degraded. [0003] Japanese Patent Laid-Open No. 2009-175684 discloses a low ion density liquid crystal alignment film and a piperazine structure-containing diamine compound used to prepare the liquid crystal alignment film....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56G02F1/1337C08G73/10
Inventor 梁育豪张维伦许立道
Owner CHI MEI CORP
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