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Liquid crystal alignment agent and preparation method thereof, liquid crystal alignment film and preparation method thereof, liquid crystal cell

A liquid crystal aligning agent and solvent technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of liquid crystal display charge accumulation and other problems, achieve low residual voltage, improve reliability and stability, and improve the ability to release residual charges effect of ability

Active Publication Date: 2021-09-28
SHENZHEN DALTON ELECTRONICS MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a liquid crystal alignment agent and its preparation method, a liquid crystal alignment film and its preparation method, and a liquid crystal cell to solve the charge accumulation problem of the liquid crystal display

Method used

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  • Liquid crystal alignment agent and preparation method thereof, liquid crystal alignment film and preparation method thereof, liquid crystal cell
  • Liquid crystal alignment agent and preparation method thereof, liquid crystal alignment film and preparation method thereof, liquid crystal cell
  • Liquid crystal alignment agent and preparation method thereof, liquid crystal alignment film and preparation method thereof, liquid crystal cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] (1) Preparation of polyamic acid liquid crystal alignment agent

[0084] At room temperature, under a nitrogen atmosphere, add 6.48 g (0.06 mol) of DN-1, 3.76 g (0.01 mol) of DN-2, 8.04 g (0.03 mol) of DN-4 and 88.4 g of NMP in sequence, stir at room temperature for 30 minutes, and confirm completely dissolved. Add 19.6 g (0.1 mol) of DA-1, and stir at room temperature for 3 hours to react, and the reaction solid content is 30%. After the reaction, dilute with 208.3 grams of NMP and 296.7 grams of BC to obtain a transparent viscous polyamic acid solution with a solid content of 6% and a solvent ratio of NMP / BC=50 / 50.

[0085] (2) Preparation of liquid crystal alignment film and liquid crystal cell

[0086] The polyamic acid liquid crystal alignment agent solution prepared by the above preparation method is evenly spin-coated on clean ITO glass, and then the ITO glass substrate is pre-baked at a temperature of 60-120°C for 10-20min, and then heated at a temperature of ...

Embodiment 2

[0088] (1) Preparation of polyamic acid liquid crystal alignment agent

[0089] At room temperature, under a nitrogen atmosphere, DN-1 9.72 g (0.09 mol), DN-2 3.76 (0.01 mol) and NMP 83.2 g were sequentially added, and stirred at room temperature for 30 minutes to confirm complete dissolution. Then 13.72 g (0.07 mol) of DA-1 and 8.46 g (0.03 mol) of DA-3 were added in sequence, stirred and reacted at room temperature for 3 hours, and the solid content of the reaction was 30%. After the reaction, dilute with 196.1 g of NMP and 279.3 g of BC to obtain a transparent viscous polyamic acid solution with a solid content of 6% and a solvent ratio of NMP / BC=50 / 50.

[0090] (2) Preparation of liquid crystal alignment film and liquid crystal cell

[0091] The polyamic acid liquid crystal alignment agent solution prepared by the above preparation method is evenly spin-coated on clean ITO glass, and then the ITO glass substrate is pre-baked at a temperature of 60-120°C for 10-20min, and ...

Embodiment 3

[0093] (1) Preparation of polyamic acid liquid crystal alignment agent

[0094] At room temperature, under a nitrogen atmosphere, add 5.4 g (0.05 mol) of DN-1, 10.44 g (0.02 mol) of DN-3, 8.04 g (0.03 mol) of DN-4 and 101.4 g of NMP, and stir at room temperature for 30 minutes to confirm completely dissolved. Add 19.6 g (0.1 mol) of DA-1, and stir at room temperature for 3 hours to react, and the reaction solid content is 30%. After the reaction, dilute with 39.1 grams of NMP2 and 340.6 grams of BC to obtain a transparent viscous polyamic acid solution with a solid content of 6% and a solvent ratio of NMP / BC=50 / 50.

[0095] (2) Preparation of liquid crystal alignment film and liquid crystal cell

[0096] The polyamic acid liquid crystal alignment agent solution prepared by the above preparation method is evenly spin-coated on clean ITO glass, and then the ITO glass substrate is pre-baked at a temperature of 60-120°C for 10-20min, and then heated at a temperature of 200-250°C...

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Abstract

The invention provides a liquid crystal alignment agent and a preparation method thereof, a liquid crystal alignment film and a preparation method thereof, and a liquid crystal cell, and relates to the field of liquid crystal alignment agents. In the present invention, by adding piperazine monomer to the liquid crystal alignment agent, the volume resistance and area resistance of the liquid crystal alignment agent material can be reduced, the ability of the alignment agent material to release residual charges can be effectively improved, and the reliability and stability of electronic products can be improved. . The liquid crystal cell using the liquid crystal aligning agent of the present invention has the advantages of high voltage retention rate, low residual voltage and the like.

Description

technical field [0001] The invention relates to the field of liquid crystal alignment agents, in particular to a liquid crystal alignment agent and a preparation method thereof, a liquid crystal alignment film and a preparation method thereof, and a liquid crystal cell. Background technique [0002] With the development of display technology, Liquid Crystal Display (LCD) is widely used in mobile phones, TVs, personal digital assistants, digital Various consumer electronic products such as cameras, notebook computers, and desktop computers have become the mainstream of display devices. [0003] However, most of the existing liquid crystal displays have the problem of charge accumulation, which leads to problems such as static electricity residue, electrostatic damage, signal transmission speed affected by charge accumulation, image persistence, afterimage, and poor reliability under high temperature and high humidity for a long time. Contents of the invention [0004] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10C09K19/56G02F1/1337
CPCC08G73/1078C08G73/1085C08G73/1042C08G73/1007C09K19/56G02F1/133723C08G2250/00C08G73/1032C08J5/18C08J2379/08C08J2300/12G02F1/133711G02F1/133784G02F1/1339G02F1/13392G02F2202/28
Inventor 王胜林黎厚明苏江华
Owner SHENZHEN DALTON ELECTRONICS MATERIAL CO LTD
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