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

Liquid crystal aligning agent, liquid crystal aligning film, and liquid crystal display element using the same

A liquid crystal alignment agent, liquid crystal technology, applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems that the liquid crystal cannot return to the initial state, the contrast is reduced, and the stability is small, and the contrast is suppressed, the contrast is high, and the liquid crystal is high. orientation effect

Active Publication Date: 2021-04-16
NISSAN CHEM CORP
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the alignment stability is small, when the liquid crystal is driven for a long time, the liquid crystal will not return to the initial state, and the contrast will decrease, resulting in afterimages.

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 aligning agent, liquid crystal aligning film, and liquid crystal display element using the same
  • Liquid crystal aligning agent, liquid crystal aligning film, and liquid crystal display element using the same
  • Liquid crystal aligning agent, liquid crystal aligning film, and liquid crystal display element using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0122] Hereinafter, the present invention will be specifically described with reference to examples and the like. In addition, this invention is not limited to these Examples. The abbreviations used below are as follows.

[0123] NMP: N-methyl-2-pyrrolidone

[0124] GBL: gamma-butyrolactone

[0125] BCS: Butyl Cellosolve

[0126] Acid dianhydride (A): Tetracarboxylic dianhydride of the following formula (A).

[0127] Acid dianhydride (B): Tetracarboxylic dianhydride of the following formula (B).

[0128] Acid dianhydride (C): Tetracarboxylic dianhydride of the following formula (C).

[0129] DA-1: Diamine of the following formula (DA-1)

[0130] DA-2: Diamine of the following formula (DA-2)

[0131] Specific compound A: the following compound (Primid XL552, manufactured by Emsky Chemical Co., Ltd.)

[0132]

[0133] The measurement methods of various characteristics are shown below.

[0134] [viscosity]

[0135] Using an E-type viscometer TVE-22H (manufactured by To...

Synthetic example 1

[0163] Make a 3L four-neck flask with a stirring device into a nitrogen atmosphere, measure 79.4g (0.33mol) of DA-1, and measure 64.8g (0.33mol) of DA-2, add 911g of NMP and 911g of GBL, and send nitrogen gas Stir to dissolve. While stirring this diamine solution, 65.0 g (0.33 mol) of acid dianhydride (C) was added, and after stirring at room temperature for 2 hours, 86.1 g (0.29 mol) of acid dianhydride (A) was added, and 390 g of NMP and GBL 390 g was stirred at 40 degreeC under nitrogen atmosphere for 30 hours, and the polyamic-acid solution (PAA-1) was obtained. The viscosity of the polyamic acid solution at a temperature of 25° C. was 215 mPa·s. Mn of this polyamic acid was 15,773, and Mw was 31,242.

Synthetic example 2

[0165] Make a 3L four-neck flask with a stirring device into a nitrogen atmosphere, measure 95.3g (0.39mol) of DA-1, and measure 51.8g (0.26mol) of DA-2, add 939g of NMP and 939g of GBL, and send nitrogen gas Stir to dissolve. While stirring this diamine solution, 65.0 g (0.33 mol) of acid dianhydride (C) was added, and after stirring at room temperature for 2 hours, 86.1 g (0.29 mol) of acid dianhydride (A) was added, and 402 g of NMP and GBL were added. 402 g was stirred at 40 degreeC under nitrogen atmosphere for 30 hours, and the polyamic-acid solution (PAA-2) was obtained. The viscosity of the polyamic acid solution at a temperature of 25° C. was 221 mPa·s. Mn of this polyamic acid was 14,773, and Mw was 32,212.

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
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

To provide a liquid crystal aligning agent, a liquid crystal aligning film, and a liquid crystal display element that have high liquid crystal orientation and voltage retention, and can achieve rapid relaxation of residual charges and high contrast. A liquid crystal aligning agent, which contains: at least one polymer selected from the group consisting of polyamic acid and its imidized polymer, the polyamic acid is composed of tetracarboxylic acid di obtained by the polycondensation reaction of the tetracarboxylic dianhydride component of an anhydride, and the diamine component containing the diamine of formula (B); and the compound represented by formula (C). (m is an integer from 1 to 5. X 1 It is an n-valent organic group containing an aliphatic hydrocarbon group or an aromatic hydrocarbon group with a carbon number of 1 to 20, n is an integer of 2 to 6, R 1 , R 2 It is a hydrogen atom or an alkyl group with 1 to 4 carbons, an alkenyl group with 2 to 4 carbons or an alkynyl group with 2 to 4 carbons optionally having a substituent, R 1 , R 2 At least one of them has a hydrocarbon group substituted with a hydroxyl group. )

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent, a liquid crystal aligning film, and a liquid crystal display element using the liquid crystal aligning agent used in a transverse electric field drive type liquid crystal display element driven by applying a parallel electric field to a substrate. Background technique [0002] Conventionally, liquid crystal devices have been widely used as display units of personal computers, mobile phones, television receivers, and the like. A liquid crystal device includes, for example, a liquid crystal layer sandwiched between an element substrate and a color filter substrate, a pixel electrode and a common electrode for applying an electric field to the liquid crystal layer, an alignment film for controlling the orientation of liquid crystal molecules in the liquid crystal layer, A thin film transistor (TFT) or the like for switching an electric signal supplied to a pixel electrode. As the driving m...

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): G02F1/1337C08K5/20C08L79/08
CPCC08K5/20C08L79/08G02F1/1337
Inventor 佐藤夏树铃木加名子坂本谦治石川和典巴幸司
Owner NISSAN CHEM CORP
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