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Liquid crystal oriented agent and method for manufacturing liquid crystal oriented film formed by same

A technology of liquid crystal orientation and orientation agent, which is applied in nonlinear optics, instruments, optics, etc.

Inactive Publication Date: 2009-12-30
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no record in the above-mentioned patents regarding the use of maleamic acid-based compounds as liquid crystal aligning agents, as well as the improvement of the coating properties of aligning agents, the control of pretilt angles, etc.

Method used

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  • Liquid crystal oriented agent and method for manufacturing liquid crystal oriented film formed by same
  • Liquid crystal oriented agent and method for manufacturing liquid crystal oriented film formed by same
  • Liquid crystal oriented agent and method for manufacturing liquid crystal oriented film formed by same

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example

[0126]

Synthetic example 1

[0128] A nitrogen inlet, stirrer, heater, condenser and thermometer are arranged on a four-necked conical flask with a volume of 500 milliliters, and nitrogen is introduced and the feed composition is added in the amount shown in Table 1. The above feed composition includes: 1 - Octadecyloxy-2,4-diaminobenzene (hereinafter referred to as C18DA) 3.76g (0.01mole), and solvent tetrahydrofuran (hereinafter referred to as THF) 50g, stirred at room temperature until dissolved. Then add 2.45 g (0.025 mole) of maleic anhydride (hereinafter referred to as MAn) and react at room temperature for 3 hours. After the reaction, the reaction solution is filtered, and the filtered solid is repeatedly washed and filtered with THF three times, and placed in a vacuum After drying in an oven at a temperature of 60° C., the compound (A-1-1) containing two maleamic acid groups can be obtained.

Synthetic example 2～4

[0130] The operation method is the same as in Synthesis Example 1, except that the type of polyamine-based compound and the amount of maleic anhydride are changed. The detailed information is shown in Table 1.

[0131]

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PUM

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Abstract

The invention relates to a liquid crystal oriented agent and a manufacturing method, in particular to a free radical polymerized liquid crystal oriented agent with excellent coatability, a manufacturing method of a liquid crystal oriented film which has excellent reliability and voltage conservation rate and easily controlled pretilt angle and can be obtained by a dewatering closed-loop and free radical polymerization reaction after coating the liquid crystal orientation agent on a substrate, and a liquid crystal display element with the liquid crystal oriented film. The free radical polymerization liquid crystal orientation agent contains a compound (A) with a molecule containing two or more polymerized maleamic acid radicals, a polymer (B) and an organic solvent (C), wherein the polymer (B) is selected from at least one of polyester, polyurethane, polyamide imide acid, polyamide imide, polyamic ester, polyamide and polyimide polymer which are obtained by a polymerization reaction. The manufacturing method of the liquid crystal oriented film comprises the step that after the liquid crystal oriented agent is coated on the substrate, the dewatering closed-loop and free radical polymerized reaction are carried out.

Description

technical field [0001] The invention relates to a novel liquid crystal aligning agent, a liquid crystal aligning film formed therefrom, a manufacturing method, and a liquid crystal display element having the liquid crystal aligning film. In particular, to provide a free radical polymerizable liquid crystal aligning agent with good applicability, and after coating the liquid crystal aligning agent on the substrate, dehydration ring closure and free radical polymerization can be performed to obtain a good reliability and voltage retention The invention discloses a method for manufacturing a liquid crystal aligning film with the advantage of being easy to control the pretilt angle, and a liquid crystal display element having the liquid crystal aligning film. Background technique [0002] Generally, liquid crystal display elements are formed by using polyamic acid, polyimide and other polymers as liquid crystal aligning agents on the surface of a substrate with a transparent con...

Claims

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Application Information

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IPC IPC(8): G02F1/1337
Inventor 薛怀斌
Owner CHI MEI CORP
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