Liquid crystal orientational agent and liquid crystal display component

A technology of liquid crystal alignment agent and tetracarboxylic dianhydride, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problem that the improvement effect of voltage retention rate cannot be said to be good enough, and achieve excellent coating properties and high voltage The effect of retention

Active Publication Date: 2007-11-21
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to these reports, the effect of improving the voltage retention rate cannot be said to be good enough, and at the same time, studies have not been conducted from the viewpoint of improving the applicability when forming an alignment film.

Method used

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  • Liquid crystal orientational agent and liquid crystal display component
  • Liquid crystal orientational agent and liquid crystal display component
  • Liquid crystal orientational agent and liquid crystal display component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0108] Hereinafter, the present invention will be described in more detail through examples, but the present invention is not limited to these examples. The imidization ratio, voltage retention ratio, and printability in the examples and comparative examples were evaluated by the following methods.

[0109] [Imidation rate]

[0110] After the polymer was dried under reduced pressure at room temperature, a superconducting nuclear magnetic resonance absorption device (NMR, manufactured by JEOL Co., Ltd., trade name: EX-90A) was used in deuterated dimethyl sulfoxide (DMSO-d 6 In ), use tetramethylsilane as the reference substance to determine 1 H-NMR. In the data obtained, the imidization rate was calculated by the ratio of the peak area (near 10 ppm) derived from the NH proton in the polymer to the peak area derived from other protons.

[0111] [Voltage retention rate]

[0112] In a time span of 167 milliseconds, a voltage of 5V was applied to the liquid crystal display element, and...

Synthetic example 1

[0115] Synthesis Example 1 (Synthesis of polyamic acid P-1)

[0116] 38.3162 g (0.1709 mol) of 2,3,5-tricarboxycyclopentylacetic dianhydride as tetracarboxylic dianhydride, and pyromellitic dianhydride (0.0570 mol) as diamine compound p-phenylenediamine 18.8610 g (0.1744 mol) and 30.3955 g (0.0581 mol) of the diamine represented by the above formula (14) were dissolved in 400 g of N-methyl-2-pyrrolidone and reacted at 60°C for 4 hours. Next, the reaction solution was poured into a large excess of methanol to precipitate the reaction product. Then, it was washed with methanol, and dried under reduced pressure at 40°C for 24 hours to obtain 88 g of polyamic acid having a logarithmic viscosity of 0.70 dl / g (which is referred to as "Polymer P-1").

Synthetic example 2

[0117] Synthesis Example 2 (Synthesis of imidized polymer P-2)

[0118] 20.8381 g (0.0930 mol) of 2,3,5-tricarboxycyclopentylacetic dianhydride as tetracarboxylic dianhydride, 9.2129 g (0.0852 mol) of p-phenylenediamine as a diamine compound, and the above formula (14 4.9490 g (0.0095 mol) of the diamine represented by) was dissolved in 140 g of N-methyl-2-pyrrolidone, and reacted at 60°C for 5 hours. Next, the reaction solution was poured into a large excess of methanol to precipitate the reaction product. Then, it was washed with methanol, and dried at 40° C. for 24 hours under reduced pressure to obtain 31 g of polyamic acid having a logarithmic viscosity of 0.70 dl / g. 30 g of the obtained polyamic acid was dissolved in 400 g of N-methyl-2-pyrrolidone, 6.3 g of pyridine and 8.1 g of acetic anhydride were added, dehydration and ring closure were carried out at 110°C for 4 hours, and the same precipitation, washing and depressurization were performed as above. 26 g of an imidized...

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Abstract

The invention provides a liquid crystal orientational agent which has high voltage conservation rate and epitaxial film with good coating characteristic and a liquid crystal display component having good image and the epitaxial film. A liquid crystal orientational agent contains aminimide polymer aminated by daiamid acid and / or daiamid acid obtained by addition polymerization at least one of diamine compound and tetrabasic carboxylic acid anhydride in the group consisting of aliphatic tetrabasic carboxylic acid anhydride and alicyclic tetrabasic carboxylic acid anhydride; and free radical reaction compound whose molecule has at least one acrylic acid radical and / or methacrylic acid radical.

Description

Technical field [0001] The present invention relates to a novel liquid crystal alignment agent and a liquid crystal display element. More specifically, it relates to a new type of liquid crystal aligning agent that exhibits a high voltage holding ratio and is excellent in applicability when forming an alignment film, and a liquid crystal display element having a beautiful image. Background technique [0002] From the viewpoint of space saving and low power consumption, liquid crystal display elements represented by liquid crystal displays have been used in watches, portable game consoles, word processors, notebook computers, and car navigation devices since the mass production of liquid crystal calculators , Camcorders, PDAs, digital cameras, mobile phones, various monitors, LCD TVs and other fields, and are still actively developed. As the liquid crystal display element, a nematic liquid crystal with positive dielectric anisotropy is used. The long axis of the liquid crystal mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C09K19/38
CPCC09K19/56G02F1/1337
Inventor 宫本佳和松本贵博西川通则
Owner JSR CORPORATIOON
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