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Liquid crystal display element composition, liquid crystal alignment layer, liquid crystal display element and manufacturing method thereof

A technology for a liquid crystal display element and a manufacturing method, applied in the directions of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of increasing the voltage holding ratio, and achieve the suppression of the voltage holding ratio. high speed effect

Active Publication Date: 2014-08-27
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In addition, it has been found that liquid crystal display elements using alkenyl liquid crystals can increase the response speed, but on the other hand, compared with liquid crystal cells that do not contain alkenyl liquid crystals in the liquid crystal layer, due to the presence of photopolymerizable monomers, The decrease in voltage retention due to light irradiation during polymerization becomes larger

Method used

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  • Liquid crystal display element composition, liquid crystal alignment layer, liquid crystal display element and manufacturing method thereof
  • Liquid crystal display element composition, liquid crystal alignment layer, liquid crystal display element and manufacturing method thereof
  • Liquid crystal display element composition, liquid crystal alignment layer, liquid crystal display element and manufacturing method thereof

Examples

Experimental program
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Embodiment

[0171] Hereafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples.

[0172] The weight average molecular weight of each polymer in each synthesis example, the epoxy equivalent, the solution viscosity of each polymer solution, and the imidation rate of polyimide were measured by the following method.

[0173] [Weight average molecular weight of polymer]

[0174] The weight-average molecular weight Mw of the polymer is a polystyrene-equivalent value measured by gel permeation chromatography under the following conditions.

[0175] Column: Tosoh (Tosoh) Co., Ltd., TSKgelGRCXLII

[0176] Solvent: THF

[0177] Temperature: 40°C

[0178] Pressure: 68kgf / cm 2

[0179] [epoxy equivalent]

[0180] The epoxy equivalent is a value measured in accordance with the "hydrochloric acid-methyl ethyl ketone method" of JIS C2105.

[0181] [Solution Viscosity of Polymer Solution]

[0182] The solution viscosity [mPa·s] of th...

Synthetic example P1

[0188] [Synthesis Example P1: Synthesis of Polyamic Acid (P-1)]

[0189] 11.3 g (0.05 mol) of 2,3,5-tricarboxycyclopentylacetic dianhydride as tetracarboxylic dianhydride, and bicyclo[3.3.0]octane-2,4,6,8-tetracarboxylic acid -2:4,6:8-dianhydride 12.6g (0.05mol), and as diamine cholestalkoxy-2,4-diaminobenzene 5.02g (0.01mol), N-(2,4- Diaminophenyl)-4-(4-heptylcyclohexyl)benzamide 4.13g (0.01 mol), 3,5-diaminobenzoic acid 6.17g (0.04 mol), 1-(4-aminophenyl) -2,3-one hydrogen-1,3,3-trimethyl-1H-inden-6-amine 8.1g (0.03 mol) and 4,4'-dithiodiphenylamine 2.52g (0.01 mol) were dissolved in In 200 g of N-methyl-2-pyrrolidone (NMP), the reaction was carried out at 60° C. for 6 hours. Then, the reaction mixture was poured into very excess methanol to precipitate the reaction product. The polyamic acid (P-1) which is a compound (A) was obtained by washing|cleaning the collect|recovered deposit with methanol, and drying at 40 degreeC for 15 hours under reduced pressure. When the ob...

Synthetic example P2

[0190] [Synthesis Example P2: Synthesis of Polyimide (P-2)]

[0191] Polyamic acid (P-1) was obtained by carrying out the operation similar to synthesis example P1. After adjusting the obtained polyamic acid (P-1) so that it might become 10 wt% by NMP, 12.03 g of pyridine and 15.53 g of acetic anhydride were added, and dehydration ring-closure reaction was performed at 100 degreeC for 8 hours. Then, the reaction mixture was poured into very excess methanol to precipitate the reaction product. After washing the recovered precipitate with methanol, it was dried under reduced pressure at 40° C. for 15 hours to obtain a polyimide (P -2). When the obtained polyamic acid (P-2) was adjusted so that it might become 10 wt% by NMP, and the viscosity of this solution was measured, it was 530 mPa*s.

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PUM

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Abstract

The invention provides a liquid crystal display element composition, a liquid crystal alignment layer, a liquid crystal display element and a manufacturing method thereof. The invention obtain a liquid crystal display element with high response and excellent voltage maintaining characteristics. In the liquid crystal display element composition on at least one layer out of a liquid layer forming liquid crystal display elements and a liquid crystal alignment layer, a structural composition (A) capable of realizing chain transfer is included.

Description

technical field [0001] The present invention relates to a composition for a liquid crystal display element, a liquid crystal display element and a manufacturing method thereof. Background technique [0002] Generally, a liquid crystal display element has a liquid crystal layer containing liquid crystal molecules and a liquid crystal alignment layer (liquid crystal alignment layer) that sandwiches the liquid crystal layer and controls the liquid crystal molecules into a desired alignment state between a pair of opposing substrates. membrane). In addition, as a liquid crystal display device, various driving methods having different electrode structures and physical properties of liquid crystal molecules used have been developed. For example, the Multi-Domain Vertical Alignment (MVA) type panel, known as the vertical alignment mode, uses protrusions formed in the liquid crystal panel to define the tilt direction of the liquid crystal molecules, thereby expanding the viewing an...

Claims

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Application Information

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IPC IPC(8): C09K19/56G02F1/1333G02F1/1337
CPCC08G73/10C08L79/08C08L83/04C09K19/56G02F1/1337
Inventor 樫下幸志
Owner JSR CORPORATIOON
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