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Liquid crystal aligning agent, liquid crystal alignment layer, liquid crystal display element, polyamide acids and polyimides

A technology of liquid crystal alignment agent and polyamic acid, which is applied in liquid crystal materials, instruments, optics, etc., can solve problems such as insufficient peelability, achieve excellent display quality, reduce the probability of bad coatings, and have excellent peelability

Active Publication Date: 2011-11-16
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the purpose of reducing the above-mentioned deterioration of water absorption, it is considered that a liquid crystal aligning film formed of a liquid crystal aligning agent mixed with a compound having an epoxy group has insufficient peelability at the time of rework.

Method used

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  • Liquid crystal aligning agent, liquid crystal alignment layer, liquid crystal display element, polyamide acids and polyimides
  • Liquid crystal aligning agent, liquid crystal alignment layer, liquid crystal display element, polyamide acids and polyimides
  • Liquid crystal aligning agent, liquid crystal alignment layer, liquid crystal display element, polyamide acids and polyimides

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example J-1

[0214] 220g (1.0mol) of 2,3,5-tricarboxycyclopentylacetic dianhydride as tetraacid dianhydride and 3-(2,4-diaminophenoxy) of 49g (0.1mol) as diamine Cholesterane, 53g (0.2mol) of 1-(4-aminophenyl)-2,3-dihydro-1,3,3-trimethyl-1H-inden-5-amine (the above formula (A1- 1) the compound shown), 54g (0.2mol) of the compound shown in the above formula (A2-2-1), and 99g (0.5mol) of 4,4'-diaminodiphenylmethane dissolved in 1,900g of N- In methyl-2-pyrrolidone (NMP), it was made to react at 60 degreeC for 6 hours, and the solution containing a polyamic acid was obtained. The obtained polyamic acid solution was fractionated in a small amount, and the measured solution viscosity was about 1,400 mPa·s.

[0215] Next, 2,400 g of NMP was added to the obtained polyamic acid solution, and 120 g of pyridine (corresponding to 1.5 mol with respect to the amic acid unit contained in 1 mol of the above-mentioned polyamic acid) and 153 g of acetic anhydride (with respect to the above-mentioned polya...

Synthetic example J-2～J-17

[0217] In addition to the above Synthesis Example J-1, the types and amounts of tetraacid dianhydride and diamine used as raw material monomers and the amount of pyridine and acetic anhydride in the dehydration ring-closure reaction (relative to the amide that each polyamic acid has Moles of the number of moles of the acid units) are as described in Table 1, respectively, and in the same manner as the above-mentioned Synthesis Example J-1, polyimides (I-2) to (I-10) and polyimides (I-2) to (I-10) and Solutions of (II-1) to (II-7).

[0218] Table 1 shows the viscosity of the polyamic acid solution during the synthesis of these polyimide solutions and the imidation rate of the obtained polyimide.

[0219] In addition, synthesis examples J-11 to J-17 are comparative synthesis examples.

[0220] 【Table 1】

[0221]

[0222] In Table 1, the abbreviations of the raw material monomers have the following meanings, respectively, and "-" indicates that the raw material monomer corr...

Synthetic example P-1

[0243] [Synthesis of Polyorganosiloxane Having Epoxy Group]

[0244] In a reaction vessel with a stirrer, a thermometer, a dropping funnel and a reflux condenser, add 99 g of 2-(3,4-epoxycyclohexyl) ethyl trimethoxysilane as a silane compound, 500 g of Methyl isobutyl ketone and 10 g of triethylamine as a catalyst were mixed at room temperature. Next, after adding 100 g of deionized water dropwise over 30 minutes from the dropping funnel, it was reacted at 80° C. for 6 hours while stirring under reflux. After the reaction was completed, the organic layer was taken out, washed with 0.2% by weight of ammonium nitrate aqueous solution until the washed water was neutral, and the solvent and water were distilled off under reduced pressure to obtain polyorganosiloxane with epoxy groups, as Viscous transparent liquid.

[0245] The hydrolyzed condensate 1In H-NMR analysis, a peak due to the epoxy group of theoretical intensity was obtained around chemical shift (δ) = 3.2 ppm, and i...

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Abstract

The invention relates to a liquid crystal aligning agent, a liquid crystal alignment layer, a liquid crystal display element, polyamide acids and polyimides. The liquid crystal aligning agent provided does not deteriorate due to film absorbing water after liquid crystal alignment layer is formed and exposed to air for a while, has excellent coating peeling property and excellent printing performance. The liquid crystal aligning agent contains at least one polymer selected from a group consisting of polyamide acids and polymides obtained by dewatering cyclization of the polyamide acids, and the polyamide acids are obtained through reaction between diamines and tetracaboxylic dianhydrides. The liquid crystal aligning agent is characterized in that the diamines are special diamines having a structure of phenyl - indane and diamines containing carboxyl.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent, a liquid crystal aligning film, a liquid crystal display element, a polyamic acid, and a polyimide. [0002] More specifically, it is related with the liquid crystal aligning agent which shows favorable reworkability in the manufacturing process of a liquid crystal aligning film, can form a liquid crystal aligning film excellent in water resistance, and is also excellent in printability. Background technique [0003] Currently, various liquid crystal display elements such as TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, VA (Vertical Alignment) type, IPS (In-Plane Switching) type, and OCB (Optically Compensatory Birefringence) type are known. . [0004] Among these liquid crystal display elements, known resin materials such as polyamic acid, polyimide and polyester are known as the material of the liquid crystal aligning film having the function of aligning liquid crystal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56G02F1/1337C08G73/10
CPCY02P20/582C08G73/10C08L79/08C08L83/04C09K19/56G02F1/1337G02F1/133723
Inventor 吉泽纯司米仓勇永岩秀树
Owner JSR CORPORATIOON
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