Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Liquid crystal alignment agent, liquid crystal alignment film and method for forming same, liquid crystal display element and compound used for liquid crystal alignment agent

A liquid crystal alignment agent and liquid crystal alignment technology, applied in liquid crystal materials, chemical instruments and methods, organic chemistry, etc., can solve the problems of large cumulative exposure, insufficient sensitivity, etc., achieve high radiation sensitivity, good production efficiency, and reduce production cost effect

Inactive Publication Date: 2015-08-05
JSR CORPORATIOON
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional photo-alignment method using polyimide resin, polyamic acid, etc. has the following disadvantages: the sensitivity is not sufficient, and a large cumulative exposure amount is required.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid crystal alignment agent, liquid crystal alignment film and method for forming same, liquid crystal display element and compound used for liquid crystal alignment agent
  • Liquid crystal alignment agent, liquid crystal alignment film and method for forming same, liquid crystal display element and compound used for liquid crystal alignment agent
  • Liquid crystal alignment agent, liquid crystal alignment film and method for forming same, liquid crystal display element and compound used for liquid crystal alignment agent

Examples

Experimental program
Comparison scheme
Effect test

example

[0198] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited by these examples.

[0199]

[0200] Compounds represented by the following formulas (B-1) to (B-3) were synthesized according to the following scheme.

[0201] [chemical 7]

[0202]

example 1

[0204] 16.4 g (0.10 mol) of 7-hydroxycoumarin and 200 mL of formic acid were mixed, and light irradiation was performed at 80 degreeC for 60 hours using the high pressure mercury lamp of 500 W. The reaction mixture was mixed with 1,000 mL of distilled water for reprecipitation, and a solid was obtained by suction filtration. The obtained solid was recrystallized from dimethylacetamide to obtain 9.9 g (0.031 mol) of the compound (B-1) represented by the above formula (B-1).

example 2

[0206] Mix 9.6 g (0.030 mol) of compound (B-1), 3.168 g (0.066 mol) of a 50% by weight oil suspension of sodium hydride, 54 mL of toluene, and 36 mL of N,N-dimethylformamide, and mix at 80° C. , The reaction was carried out under stirring for 1 hour. Next, after cooling the reaction mixture to 20° C., 10.5 g (0.063 mol) of 1,4-dinitrobenzene was added dropwise thereto in 18 mL of N,N-dimethylformamide over 1 hour. After completion of the dropwise addition, reaction was carried out at 110° C. under stirring for 64 hours. After cooling the reaction mixture to 5° C., 270 mL of distilled water was added thereto, and extraction was performed with 180 mL of dichloromethane. The dichloromethane layer was washed three times with 150 mL of distilled water, dried over magnesium sulfate, and the solvent was removed under reduced pressure. The obtained solid was recrystallized from ethanol to obtain 10.8 g (0.019 mol) of the compound (B-2) represented by the above formula (B-2).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
Login to View More

Abstract

PURPOSE: A liquid crystal alignment agent is provided to have excellent radiosensitivity and to obtain excellent liquid crystal alignment by radiation with low intensity. CONSTITUTION: A liquid crystal alignment agent contains a polymer which has a structure unit including a group represented by chemical formula 0. In chemical formula 0, each of R^1 and R^2 is a hydrogen atom or a monovalent organic group. The polymer is polyamic acid, polyimide, or polyester. A forming method of a liquid crystal alignment film comprises a process of forming a coating on a substrate by using the liquid crystal alignment agent; and a step of irradiating the coating with a polarized ultraviolet ray, to obtain liquid crystal alignment.

Description

technical field [0001] The invention relates to a liquid crystal alignment agent suitable for photo-alignment, a liquid crystal alignment film, a method for forming the liquid crystal alignment film, a liquid crystal display element and a compound. Background technique [0002] Liquid crystal displays (LCDs) are widely used in televisions or various displays. There are liquid crystal units such as twisted nematic (Twisted Nematic, TN) type, super twisted nematic (Super Twisted Nematic, STN) type, in-plane switching (In Plane Switching, IPS) type, etc. in the display elements of the LCD, and there are also known Change the electrode structure of the IPS type, etc., and increase the numerical aperture of the display element part to improve the fringe field switching (Fringe Field Switching, FFS) type, etc. -120528 Bulletin). [0003] The method for aligning the liquid crystals of this liquid crystal cell is known: the method of utilizing rubbing treatment, that is, forming a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/52G02F1/1337C07D493/04
CPCC07D493/04C08G61/12C08G73/10C08G2261/53C09K19/56
Inventor 秋池利之阿部翼宫本佳和永尾隆杉山文隆
Owner JSR CORPORATIOON
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com