Polyamic acid, polyamic acid resin, heat-resistant transparent polyimide and preparation method
A technology of polyamic acid resin and polyamic acid, which is applied in the direction of final product manufacturing, sustainable manufacturing/processing, climate sustainability, etc., can solve the problems of high yellowness of transparent polyimide and restricting the application in the field of flexible display. , to achieve the effect of enhancing heat resistance and dimensional stability
Active Publication Date: 2022-06-03
ZHUZHOU TIMES NEW MATERIALS TECH
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Problems solved by technology
However, studies have shown that transparent polyimides containing sulfone structures often have the defect of high yellowness, which limits their application in the field of flexible displays.
Method used
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Embodiment 2
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Embodiment 3
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Abstract
The invention discloses a polyamic acid, a polyamic acid resin, a heat-resistant transparent polyimide and a preparation method thereof. The polyamic acid consists of not less than one fluorine-containing diamine monomer and not less than one fluorine-containing diamine The anhydride monomer and the end-capping agent are obtained through polymerization reaction in an aprotic polar solvent; wherein the fluorine-containing dianhydride with the following structure accounts for 5-20% of the total molar weight of the fluorine-containing dianhydride. The glass transition temperature of the transparent polyimide prepared by the invention is higher than 370°C, the thermal expansion coefficient is lower than 17ppm / K, and the light transmittance at 500nm is higher than 90%, which is suitable for the manufacture of transparent substrates, cover plates and touch layers in the flexible display field.
Description
Polyamic acid, polyamic acid resin, heat-resistant transparent polyimide and preparation method thereof technical field The present invention relates to a kind of polyamic acid, polyamic acid resin, heat-resistant transparent polyimide and preparation method, this resin And polyimide materials can be used in the manufacture of display substrates, cover plates and touch layers in the field of flexible display. Background technique [0002] With the development of display panels towards flexibility and ultra-thinness, displays have put forward new requirements for the performance of materials. The traditional rigid glass is no longer suitable for the manufacture of flexible display panels. It is OK to use transparent organic material instead of rigid glass industry problems to be solved. The substrate, cover and touch layer not only have high requirements on the light transmittance and mechanical properties of the material, but also Due to the high temperature process ...
Claims
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IPC IPC(8): C08G73/10
CPCC08G73/1039C08G73/1042Y02P70/50
Inventor 江乾刘亦武刘杰彭军段瑨胡峰刘婷刘含茂王进许双喜
Owner ZHUZHOU TIMES NEW MATERIALS TECH