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Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element

A technology of liquid crystal alignment agent and solvent, which is applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems of reducing the display quality of display components, and achieve the effect of excellent afterimage characteristics and high yield

Active Publication Date: 2019-06-28
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In this brushing treatment, it is known that dust generated due to scratching the liquid crystal alignment film, scratches attached to the liquid crystal alignment film will reduce Indicates the representation quality of the component

Method used

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  • Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element

Examples

Experimental program
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Effect test

Embodiment

[0150] Examples are given below to describe the present invention more specifically, but the present invention is not limited to these Examples. The abbreviations of the following compounds and the measurement methods of each characteristic are as follows.

[0151] NMP: N-methyl-2-pyrrolidone, GBL: γ-butyrolactone,

[0152] BCS: butyl cellosolve,

[0153] DA-1: bis(4-aminophenoxy)methane,

[0154] DA-2: 1,2-bis(4-aminophenoxy)ethane,

[0155] DA-3: N-tert-butoxycarbonyl-N-(2-(4-aminophenyl)ethyl)-N-(4-aminobenzyl)amine,

[0156] DA-4: See the following formula (DA-4),

[0157] DA-5: 2-tert-butoxycarbonylaminomethyl-p-phenylenediamine (wherein, Boc represents tert-butoxycarbonyl),

[0158] DA-6: See the following formula (DA-6),

[0159] CA-1: See the following formula (CA-1), CA-2: See the following formula (CA-2),

[0160] CA-3: See the following formula (CA-3), AD-1: See the following formula (AD-1)

[0161]

[0162]

[0163] [viscosity]

[0164] The viscosity...

Synthetic example 1

[0186] Measure DA-1 1.75g ​​(7.60mmol), DA-2 4.64g (19.0mmol) and DA-3 3.89g (11.4mmol) in a 100mL four-neck flask with a stirring device and a nitrogen inlet tube, add 46.9 g of NMP was stirred and dissolved while feeding nitrogen gas. While stirring the diamine solution, 7.93 g (35.3 mmol) of CA-1 was added, and 36.1 g of NMP was further added to make the solid content concentration 18% by mass, and stirred at 40° C. for 24 hours to obtain a polyamic acid solution (A) (Viscosity: 800mPa·s). Mn=10800 and Mw=23600 of polyamic acid.

[0187] 30 g of the obtained polyamic-acid solution was weighed in the 100-ml four-necked flask equipped with the stirring device and the nitrogen introduction pipe, NMP 37.5g was added, and it stirred for 30 minutes. 3.39 g of acetic anhydride and 0.88 g of pyridine were added to the obtained polyamic acid solution, and it heated at 55 degreeC for 3 hours, and chemically imidized it. The resulting reaction solution was poured into 270 ml of met...

Synthetic example 2

[0190] Measure DA-1 3.50g (15.2mmol), DA-2 2.78g (11.4mmol), DA-3 3.89g (11.4mmol) in a 100mL four-neck flask with a stirring device and a nitrogen inlet tube, add 46.36 g of NMP was stirred and dissolved while feeding nitrogen gas. While stirring this diamine solution, 7.92 g (35.3 mmol) of CA-1 was added, and 36.1 g of NMP was added to make the solid content concentration 18% by mass, and stirred at 40° C. for 24 hours to obtain a polyamic acid solution (C ) (viscosity: 820mPa·s). Mn=11000 and Mw=25200 of polyamic acid.

[0191] 30 g of the obtained polyamic-acid solution was weighed in the 100 mL four-necked flask equipped with the stirring device and the nitrogen introduction tube, 37.5 g of NMP was added, and it stirred for 30 minutes. 3.40 g of acetic anhydride and 0.88 g of pyridine were added to the obtained polyamic acid solution, and it heated at 55 degreeC for 3 hours, and chemically imidized it. The resulting reaction solution was poured into 270 ml of methanol ...

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Abstract

The present invention provides a liquid crystal aligning agent which enables the achievement of a liquid crystal alignment film that has high film hardness, good afterimage characteristics and the like. A liquid crystal aligning agent which contains the component (A) and the component (B) described below, and an organic solvent. Component (A): A polyimide which is an imidized product of a polyimide precursor that is a reaction product of a tetracarboxylic acid derivative component and a diamine component containing a diamine having a structure of formula (1), and which has an imidization rateof from 20% to 80%. (In the formula, * represents a bond with another atom or group.) Component (B): A compound which has two or more crosslinkable functional groups.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent, a liquid crystal aligning film obtained from the liquid crystal aligning agent, and a liquid crystal display element using the liquid crystal aligning film. Background technique [0002] The liquid crystal aligning film is a film for controlling the alignment of liquid crystal molecules in a constant direction in liquid crystal display elements and retardation plates using polymerizable liquid crystals. For example, a liquid crystal display element has a structure in which liquid crystal molecules constituting a liquid crystal layer are sandwiched between liquid crystal aligning films formed on the respective surfaces of a pair of substrates. Then, the liquid crystal molecules are aligned in a constant direction at a pretilt angle by the liquid crystal alignment film, and respond by applying a voltage to electrodes disposed between the substrate and the liquid crystal alignment film. As...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C08G73/10C08J5/18C08K5/20C08L79/08
CPCC08G73/10C08J5/18C08K5/20C08L79/08G02F1/1337C08G73/1046C08G73/1042C08G73/1032
Inventor 国见奈穗杉山崇明
Owner NISSAN CHEM IND LTD
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