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

A liquid crystal alignment agent and solvent technology, applied in liquid crystal materials, instruments, optics, etc., can solve problems such as printability decline, printing plate swelling, and APR resin swelling.

Active Publication Date: 2014-03-12
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, butyl cellosolve, which is commonly used to improve the applicability of liquid crystal alignment agents, tends to swell APR resins.
Therefore, when the liquid crystal alignment agent containing butyl cellosolve is applied on the substrate by lithography, the printing plate may swell by repeatedly applying the liquid crystal alignment agent to the printing plate, which may degrade the printability. decline

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0160] Hereinafter, the present invention will be further specifically described using examples, but the present invention is not limited by these examples.

[0161] The solution viscosity of each polymer solution in a synthesis example, the imidization rate of a polyimide, a weight average molecular weight, and epoxy equivalent were measured by the following methods.

[0162] [Solution Viscosity of Polymer Solution]

[0163] The solution viscosity (mPa·s) of the polymer solution was measured at 25°C for a solution adjusted to a polymer concentration of 10% by weight using a predetermined solvent using an E-type rotational viscometer.

[0164] [Imidation rate of polyimide]

[0165] Put the polyimide solution into pure water, dry the obtained precipitate under reduced pressure at room temperature, dissolve it in deuterated dimethyl sulfoxide, use tetramethylsilane as a reference substance, and determination 1 H-NMR ( 1 H-Nuclear Magnetic Resonance, 1 H-NMR). according to ...

Synthetic example 1

[0177][Synthesis Example 1: Synthesis of Polyimide (PI-1)]

[0178] 22.4 g (0.1 mol) of 2,3,5-tricarboxycyclopentylacetic dianhydride as tetracarboxylic dianhydride, 8.6 g (0.08 mol) of p-phenylenediamine as diamine, and 3,5-diamino 10.5 g (0.02 mol) of cholestyl benzoate was dissolved in 166 g of N-methyl-2-pyrrolidone (NMP), and reacted at 60° C. for 6 hours to obtain a solution containing 20% ​​by weight of polyamic acid. A small amount of the obtained polyamic acid solution was fractionated, NMP was added to obtain a solution having a polyamic acid concentration of 10% by weight, and the solution viscosity measured for this solution was 90 mPa·s.

[0179] Next, NMP was added to the obtained polyamic acid solution to obtain a solution having a polyamic acid concentration of 7% by weight, 11.9 g of pyridine and 15.3 g of acetic anhydride were added, and a dehydration ring-closure reaction was performed at 110° C. for 4 hours. After the dehydration ring-closure reaction, the...

Synthetic example 2

[0180] [Synthesis Example 2: Synthesis of Polyimide (PI-2)]

[0181] 22.5 g (0.1 mol) of 2,3,5-tricarboxycyclopentylacetic dianhydride as tetracarboxylic dianhydride, 7.6 g (0.07 mol) of p-phenylenediamine as diamine, 3,5-diamino Cholesteryl benzoate 5.2g (0.01 mol) and 4,4'-diaminodiphenylmethane 4.0g (0.02 mol) were dissolved in 157g of NMP, and reacted for 6 hours at 60°C to obtain poly Amic acid 20% by weight solution. A small amount of the obtained polyamic acid solution was fractionated, NMP was added to obtain a solution having a polyamic acid concentration of 10% by weight, and the solution viscosity measured for this solution was 110 mPa·s.

[0182] Next, NMP was added to the obtained polyamic acid solution to obtain a solution having a polyamic acid concentration of 7% by weight, 16.6 g of pyridine and 21.4 g of acetic anhydride were added, and a dehydration ring-closure reaction was performed at 110° C. for 4 hours. After the dehydration ring-closure reaction, the...

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Abstract

The present invention relates to a liquid crystal alignment agent, liquid crystal alignment film and liquid crystal display element. The present invention provides a liquid crystal alignment agent that not only is a good coating property on the substrate, but is difficult to swelling the printing plate and is excellent in continuous printing. The liquid crystal alignment agent of the present invention comprises: at least one polymer (A) that selected from a group that comprises a polyamic acid, a polyimide, a polyamic acid ester and a polyorganosiloxane. In addition, the liquid crystal alignment agent comprises a solvent of compound (p1) that represented in the following formula (1) (Formula (1), R1 and R3 are respectively a straight-chain or a branched 1-alkyl having a carbon number from 1 to 3, and R2 is a straight-chain or branched 2-alkyl having a carbon number from 2 to 5.).

Description

technical field [0001] The invention relates to a liquid crystal alignment agent, a liquid crystal alignment film and a liquid crystal display element, in particular to a liquid crystal alignment agent with good printability, and a liquid crystal alignment film and a liquid crystal display element produced by using the liquid crystal alignment agent. Background technique [0002] In the past, liquid crystal display elements have developed liquid crystal display elements with different driving methods such as electrode structure or the physical properties of liquid crystal molecules used, such as known twisted nematic (Twisted Nematic, TN) type or super twisted nematic ( Super Twisted Nematic, STN) type, vertical alignment (Vertical Alignment, VA) type, in-plane switching (In Plane Switching, IPS) type, fringe field switching (Fringe Field Switching, FFS) type, optically compensated bending (Optically Compensated Bend, OCB) type and other liquid crystal display elements. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56G02F1/1337G02F1/1333C08L79/08C08L83/04C08G73/10C08K5/3415C08K5/103
CPCC08K5/10C08L79/08C08L83/04C09K19/56G02F1/133711
Inventor 植阪裕介加藤孝人野口峻一
Owner JSR CORPORATIOON
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