Liquid crystal orientation agent, liquid crystal orientation film, manufacturing method of liquid crystal orientation film, and liquid crystal display element

A liquid crystal alignment agent and a technology of liquid crystal alignment, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of printing plate swelling, APR resin swelling, and printing decline

Inactive Publication Date: 2014-03-26
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 to substrates, tends to swell APR resins.
Therefore, when the liquid crystal alignment agent containing but

Method used

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  • Liquid crystal orientation agent, liquid crystal orientation film, manufacturing method of liquid crystal orientation film, and liquid crystal display element
  • Liquid crystal orientation agent, liquid crystal orientation film, manufacturing method of liquid crystal orientation film, and liquid crystal display element
  • Liquid crystal orientation agent, liquid crystal orientation film, manufacturing method of liquid crystal orientation film, and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0201] Hereinafter, the present invention will be further specifically described using examples, but the present invention is not limited by these examples.

[0202] 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.

[0203] [Solution Viscosity of Polymer Solution]

[0204] The solution viscosity (mPa·s) of the polymer solution was measured at 25° C. using an E-type rotational viscometer for a solution adjusted to a polymer concentration of 10% by weight using a predetermined solvent.

[0205] [Imidation rate of polyimide]

[0206] 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 t...

Synthetic example 1

[0218] [Synthesis Example 1: Synthesis of Polyimide (PI-1)]

[0219] 224g (0.1 mol) of 2,3,5-tricarboxycyclopentylacetic dianhydride (TCA) as tetracarboxylic dianhydride, p-phenylenediamine (p-phenylenediamine, PDA) 86g (0.08 mol) as diamine ) and 105 g (0.02 mol) of cholestanyl diaminobenzoate (HCDA), 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.

[0220]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...

Synthetic example 2

[0221] [Synthesis Example 2: Synthesis of Polyimide (PI-2)]

[0222] 22.5 g (0.1 mol) of TCA as tetracarboxylic dianhydride, 7.6 g (0.07 mol) of PDA as diamine, 52 g (0.01 mol) of HCDA, and 4.0 g of 4,4'-diaminodiphenylmethane (DDM) (0.02 mol), it melt|dissolved in NMP157g, it reacted at 60 degreeC for 6 hours, and obtained the solution containing 20 weight% of polyamic acids. 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.

[0223] 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-closing reaction, the solvent in the system was solvent-substituted w...

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Abstract

The invention relates to a liquid crystal orientation agent, a liquid crystal orientation film, a manufacturing method of the liquid crystal orientation film, and a liquid crystal display element. The liquid crystal orientation agent has good printing performance with respect to a substrate and good continuous printing performance and prevents swelling of printing plates. The liquid crystal orientation agent contains at last one polymer (A) selected from the group formed by polyamide acid, polyimide, polyamide acid ester and polysiloxane, a first solvent containing more than one of N-ethyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolone, 3-methoxy-N, N-dimethylpropionamide and so on, and a second solvent containing more than one of propylene glycol diacetate, diethylene glycol diethyl ether, diisoamyl ether diacetone alcohol and so on.

Description

technical field [0001] The present invention relates to a liquid crystal alignment agent, a liquid crystal alignment film, a method for manufacturing a liquid crystal alignment film, and a liquid crystal display element. Specifically, it relates to a liquid crystal alignment agent with good printability and a liquid crystal prepared using the liquid crystal alignment agent. Alignment film and liquid crystal display element. Background technique [0002] In the past, liquid crystal display elements have developed a variety of different driving methods such as electrode structure or the physical properties of the liquid crystal molecules used, such as known twisted nematic (Twisted Nematic, TN) type or super twisted nematic (Super Twisted Nematic, STN) type, Vertical Alignment (VA) type, In-Plane Switching (IPS) type, Fringe Field Switching (FFS) type, Optically Compensated Bend (OCB) type And other liquid crystal display components. These liquid crystal display elements hav...

Claims

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Application Information

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IPC IPC(8): C09K19/56G02F1/1337
CPCC08K5/16C08L79/08C08L83/04C09K19/56G02F1/133711
Inventor 植阪裕介野口峻一加藤孝人片桐宽清水成夫杉山文隆伊藤贤一
Owner JSR CORPORATIOON
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