Unlock instant, AI-driven research and patent intelligence for your innovation.

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

A technology of liquid crystal aligning agent and liquid crystal aligning film, which is applied in the directions of instruments, coatings, optics, etc., can solve the problems of no covalent bond formation and insufficient substrate bonding, and achieves improved adhesion without reducing liquid crystal alignment. Effect

Active Publication Date: 2019-04-09
NISSAN CHEM CORP
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the panel becomes narrower, the coating position of the sealant used in the production of liquid crystal display elements will be the position in contact with the end of the liquid crystal alignment film, or it will be coated on the upper part of the liquid crystal alignment film. Polyimide There is no polar group or there are few polar groups, so there is a problem that the sealant does not form a covalent bond with the surface of the liquid crystal alignment film, and the adhesion between the substrates becomes insufficient.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0202] Examples are given below to further describe the present invention in detail. However, the present invention is not limitedly interpreted by these Examples. The abbreviations of the compounds used are shown below.

[0203] NMP: N-methyl-2-pyrrolidone GBL: γ-butyrolactone

[0204] BCS: Butyl Cellosolve IPA: 2-Propanol

[0205] NEP: N-ethyl-2-pyrrolidone PB: Propylene glycol monobutyl ether

[0206] DA-2: a compound represented by the following formula (DA-2)

[0207] DA-3: a compound represented by the following formula (DA-3)

[0208] DA-4: a compound represented by the following formula (DA-4)

[0209] DA-5: p-phenylenediamine

[0210] DA-6: 3,5-Diaminobenzoic acid

[0211] DA-7: 4,4’-Diaminodiphenylmethane

[0212] DA-8: 4,4’-Diaminodiphenylamine

[0213] DA-9: 1,3-bis(4-aminophenoxy)propane

[0214] DA-10: 1,5-bis(4-aminophenoxy)pentane

[0215] DA-11: a compound represented by the following formula (DA-11)

[0216] DA-12: a compound represented by the fo...

Synthetic example 1

[0262] Measure 2.92g (27.0mmol) of diamine DA-5 and 0.71g (3.0mmol) of diamine DA-2 into a 100mL four-necked flask equipped with a stirring device and a nitrogen gas inlet tube, add 81.76g of NMP, and stir while feeding nitrogen gas to dissolve it. While stirring this diamine solution, 6.46 g (28.8 mmol) of carboxylic dianhydride DC-1 was added, and further, NMP was added so that the solid content concentration became 10% by mass, and stirred at room temperature for 4 hours to obtain a polyamic acid solution (PAA-1). The viscosity of this polyamic acid solution at a temperature of 25° C. was 230 mPa·s. In addition, the molecular weight of this polyamic acid was Mn=11,131, Mw=30,009.

Synthetic example 2

[0264] Measure 2.27g (21.0mmol) of diamine DA-5 and 2.69g (9.0mmol) of diamine DA-4 into a 100mL four-neck flask equipped with a stirring device and a nitrogen gas inlet tube, add 61.87g of NMP, and stir while feeding nitrogen gas to dissolve it. While stirring this diamine solution, 5.59 g (28.5 mmol) of carboxylic dianhydride DC-2 was added, and further, NMP was added so that the solid content concentration became 12% by mass, and the polyamic acid was obtained by stirring at room temperature for 4 hours. solution (PAA-2). The viscosity of the polyamic acid solution at a temperature of 25° C. was 410 mPa·s. In addition, the molecular weight of this polyamic acid was Mn=9,042, Mw=19,958.

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
thicknessaaaaaaaaaa
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

This invention provides the liquid crystal aligning agent which can improve the adhesiveness of a sealing compound and a liquid crystal aligning film, and can suppress generation|occurrence|production of display unevenness in the vicinity of the frame of a liquid crystal display element under high-temperature, high-humidity conditions. A liquid crystal aligning agent containing (A) component, (B) component, and an organic solvent. (A) component: at least 1 sort(s) of polymer chosen from the group which consists of the polyimide precursor which has a structural unit represented by formula (1), and the imidation polymer of this polyimide precursor. (B) component: the compound which has a hydroxyalkylamide group. (X 1 is independently a 4-valent organic group; Y 1 is a divalent organic group; R 1 is a hydrogen atom or an alkyl group with 1 to 5 carbons; A 1 、A 2 are independently a hydrogen atom, an alkyl group having 1 to 10 carbons, an alkenyl group having 2 to 10 carbons, or an alkynyl group having 2 to 10 carbons, and these groups may have a substituent. )

Description

technical field [0001] This invention relates to the liquid crystal aligning agent used for manufacture of a liquid crystal display element, the liquid crystal aligning film obtained from this liquid crystal aligning agent, and the liquid crystal display element using this liquid crystal aligning film. Background technique [0002] Liquid crystal display elements are known as light-weight, thin-volume and low-power display devices. In recent years, high-definition liquid crystal display devices for mobile phones and tablet-type terminals, which are rapidly expanding in market share, have achieved remarkable development to the extent that high display quality is required. [0003] The liquid crystal display element is constituted by sandwiching a liquid crystal layer between a pair of transparent substrates equipped with electrodes. In a liquid crystal display element, an organic film formed of an organic material is used as a liquid crystal alignment film to form a desired ...

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): G02F1/1337C08L79/08
CPCG02F1/133723C09D179/08C08G73/1042C08G73/105C08G73/1078
Inventor 万代淳彦野口勇步
Owner NISSAN CHEM CORP