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Liquid crystal aligning agent

A liquid crystal alignment agent and polymer technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of difficult ionic charge detachment, image afterimage, etc., and achieve the effect of improving performance and stabilizing the pretilt angle.

Active Publication Date: 2014-07-23
DAXIN MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, when a voltage is applied to the liquid crystal display, the generated ionic charges will be absorbed by the liquid crystal alignment film, and even after the applied voltage is released, it is difficult to detach the ionic charges from the liquid crystal alignment film, thus causing the screen Afterimage problem

Method used

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Embodiment Construction

[0035] The liquid crystal alignment agent of the present invention includes polymer (A) and polymer (B). The polymer (A) is a polyimide-polyamic acid having a side chain diamine represented by the following formula (1). Polymer (B) is the polyamic acid which also has a side chain diamine structure represented by following formula (2).

[0036] Formula 1)

[0037]

[0038] Formula 1)

[0039]

[0040] Formula (2)

[0041] In formula (1) and formula (2), T 1 , T 2 and T 3 Represented as tetravalent organic groups, m+n=1, n≤0.5, D 1 or D 2 At least a part of it is a divalent organic group selected from formula (3) or a diamine compound shown in formula (4), D 3 At least a part of it is a divalent organic group of a diamine compound represented by formula (4), and D 1 、D 2 and D 3 The remainder in is the divalent organic group of the diamine compound.

[0042]

[0043] Formula (3)

[0044] In formula (3), R 1 , R 2 , R 3 , R 5 and R 6 are independently r...

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Abstract

The invention discloses a liquid crystal aligning agent. The liquid crystal aligning agent comprises a polymer (A) and a polymer (B). The polymer (A) is polyimide-polyamid-acid with side-chain diamine. The polymer (B) is polyamid-acid with side-chain diamine. The liquid crystal aligning agent provided in the invention has the characteristics of tilt angle stability, excellent haptic performances and shadow problem alleviation.

Description

technical field [0001] The invention relates to a liquid crystal alignment agent, in particular to a liquid crystal alignment agent comprising polyimide-polyamic acid with side chain diamine and polyamic acid with side chain diamine. Background technique [0002] Liquid crystal display (liquid crystal display) is a display that utilizes the photoelectric changes of liquid crystals. It has attractive advantages such as small size, light weight, low power consumption, and good display quality. Therefore, it has become the mainstream of flat-panel displays in recent years. [0003] With the expansion of screen size, the requirements for high color saturation, high contrast and improved response speed, the development of liquid crystal displays has evolved from twisted nematic (TN) liquid crystal displays to super twisted nematic (STN) ) liquid crystal display, until now it has been developed to a TFT type liquid crystal display in which each pixel is equipped with a thin film t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56
Inventor 张立心林冠铭赖铭智
Owner DAXIN MATERIALS
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