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Polyamic acid component and alignment film produced by the same

A technology of polyamic acid and composition, which is applied in the field of polyamic acid composition and the alignment film made from it, and can solve the problems of general products without structure, inconvenience, liquid crystal alignment property testing, etc.

Active Publication Date: 2008-06-11
DAILY POLYMER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although the alignment film of the above-mentioned previous proposal can make the liquid crystal have an appropriate pretilt angle, the voltage maintenance ratio can only reach 98.4% at the highest, and the alignment property of the liquid crystal has not been tested, and according to the requirements of the current industry, the voltage maintenance ratio is relatively low. The optimal requirement is more than 99%, and the liquid crystal must have better alignment properties. It can be seen that the polyamic acid composition of the above-mentioned prior art still needs to be improved.
[0011] It can be seen that the above-mentioned existing polyamic acid composition and alignment film obviously still have inconvenience and defects in structure and use, and need to be further improved urgently.
In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general products do not have a suitable structure to solve the above-mentioned problems. This is obviously related The problem that the industry is eager to solve

Method used

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  • Polyamic acid component and alignment film produced by the same
  • Polyamic acid component and alignment film produced by the same
  • Polyamic acid component and alignment film produced by the same

Examples

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Embodiment 1

[0080] [Common production method of Example 1 and Comparative Examples 1-8]

[0081] 1. Preparation of polyamic acid A1~A4 and B1:

[0082] A1: Add 21.17 grams of HDAM and 19.01 grams of BDA to 206 grams of NMP, stir at 20°C for 24 hours, and then add an appropriate amount of the above solvent for dilution to obtain a polyamide with a solid content concentration of 8wt% Acid A1.

[0083] A2: Add 8.75 grams of HDAM, 8.02 grams of BDA, 14.90 grams of BAPB and 8.48 grams of PMDA to 161 grams of NMP, then stir at 20°C for 24 hours, and then add an appropriate amount of the above solvent for dilution to A polyamic acid A2 having a solid content concentration of 8 wt% was obtained.

[0084] A3: Add 4.05 grams of HDAM, 3.71 grams of BDA, 20.70 grams of BAPB and 11.94 grams of PMDA to 162 grams of NMP, then stir at 20°C for 24 hours, and then add an appropriate amount of the above solvent to dilute. A polyamic acid A3 having a solid content concentration of 8 wt% was obtained.

[0085] A...

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Abstract

The invention relates to polyamic acid composition and an alignment film produced by the polyamic acid composition. The polyamic acid composition comprises polyamic acid A made by a first reaction mixture through reaction, and polyamic acid B made by a second reaction mixture through reaction, the first reaction mixture includes aromatic tetracarboxylic diamine and aromatic diamine, and the second reaction mixture includes aliphatic tetracarboxylic diamine, aromatic diamine with side chains, and non-aromatic diamine. The invention also provides an alignment film produced through the solidification of the polyamic acid composition, and the alignment film can ensure the display device to have higher voltage maintenance proportion, proper pretilt angle and better alignment property during the practical application process.

Description

Technical field [0001] The present invention relates to a polyamic acid composition and an alignment film prepared therefrom, in particular to a polyamic acid composition with a specific combination and a higher voltage holding ratio in practical application. , VHR), proper pre-tilt angle (pre-tilt angle) and better alignment properties (orienting properties) alignment film. Background technique [0002] With the current vigorous development of the personal information product market, coupled with the advantages of liquid crystal display devices, such as light weight and low power consumption, most of the current industry is moving towards the development of various miniaturized portable information products with liquid crystal display devices. . However, since general miniaturized products cannot provide a large driving voltage, how to reduce the voltage required by the liquid crystal display device and improve the performance and properties of the liquid crystal display device ...

Claims

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Application Information

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IPC IPC(8): C08L79/04C08J5/18
Inventor 颜传特黄志雄黄昭敬高进旺洪亭慧
Owner DAILY POLYMER CORP
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