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

A liquid crystal alignment film, a technology for liquid crystal alignment, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve problems such as poor representation and reduced contrast

Active Publication Date: 2017-08-01
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, with the increase in the definition of liquid crystal display elements, it is required to suppress the decrease in the contrast of liquid crystal display elements and the poor display associated with long-term use.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0302] Although an Example is given below and this invention is demonstrated more concretely, it is not limited to them.

[0303] Abbreviations used in Synthesis Examples, Examples, and Comparative Examples are as follows.

[0304] (specific compound)

[0305] S1: Phosphotungstic acid (manufactured by Nippon Shinkoku Co., Ltd.)

[0306] S2: Phosphomolybdic acid (12 molybdenum (IV) phosphoric acid n-hydrate) (manufactured by Kanto Chemical Co., Ltd.)

[0307] (Specific diamine compound (1))

[0308]A1: a diamine compound represented by the following formula [A1]

[0309] A2: Diamine compound represented by the following formula [A2]

[0310]

[0311] (Specific diamine compound (2))

[0312] B1: 1,3-diamino-4-[4-(trans-4-n-heptylcyclohexyl)phenoxy]benzene

[0313] B2: 1,3-diamino-5-[4-(trans-4-n-heptylcyclohexyl)phenoxymethyl]benzene

[0314] B3: 1,3-Diamino-4-{4-[trans-4-(trans-4-n-pentylcyclohexyl)cyclohexyl]phenoxy}benzene

[0315] B4: Diamine compound represented ...

Synthetic example 1

[0355] Mix D4 (9.65g, 32.1mmol), B5 (1.36g, 3.61mmol) and C1 (3.52g, 32.6mmol) in NMP (30.5g), react at 40°C for 6 hours, add D1 (0.70g, 3.57mmol) and NMP (15.2g) were reacted at 40 degreeC for 6 hours, and the polyamic-acid solution whose resin solid content concentration was 25 mass % was obtained.

[0356] After adding NMP to the obtained polyamic-acid solution (30.0g) and diluting to 6 mass %, acetic anhydride (3.90g) and pyridine (2.40g) were added as an imidization catalyst, and it was made to react at 70 degreeC for 4 hours. This reaction solution was poured into methanol (460 ml), and the obtained precipitate was collected by filtration. This deposit was wash|cleaned with methanol, and it dried under reduced pressure at 100 degreeC, and obtained the polyimide powder (1). The imidization rate of this polyimide was 85%, the number average molecular weight was 19,800, and the weight average molecular weight was 51,800.

Synthetic example 2

[0358] D2 (5.95g, 23.8mmol), B3 (4.47g, 10.3mmol), C1 (1.49g, 13.8mmol) and C3 (2.10g, 10.3mmol) were mixed in NEP (32.0g) and reacted at 80°C for 5 After one hour, D1 (2.00g, 10.2mmol) and NEP (16.0g) were added, it was made to react at 40 degreeC for 6 hours, and the polyamic-acid solution (2) whose resin solid content concentration was 25 mass % was obtained. The number average molecular weight of this polyamic acid was 20,200, and the weight average molecular weight was 68,300.

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Abstract

Disclosed is a liquid crystal alignment treatment agent comprising the following components (A) and (B), wherein the component (A) is a heteropoly acid, and the component (B) is a polymer.

Description

technical field [0001] This invention relates to the liquid crystal aligning agent used for manufacture of a liquid crystal display element, the liquid crystal aligning film obtained from this liquid crystal aligning agent, and the liquid crystal display element using this liquid crystal aligning film. Background technique [0002] Liquid crystal display elements are widely used today as display devices that realize thinness and light weight. Usually, this liquid crystal display element uses a liquid crystal aligning film in order to determine the orientation state of a liquid crystal. [0003] Along with the high-definition of liquid crystal display elements, it is required that the voltage retention rate of the liquid crystal aligning film used therein is also high from the viewpoint of suppressing a decrease in contrast of liquid crystal display elements and reducing the afterimage phenomenon. In this regard, a liquid crystal aligning agent containing a very small amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C08G73/10
CPCC08G73/10G02F1/1337C09K19/56
Inventor 桥本淳若林晓子三木德俊保坂和義中家直树
Owner NISSAN CHEM IND LTD
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