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Preparation method of thin electronic polyimide film

A polyimide film, electronic grade technology, applied in the field of polyimide film preparation and production, can solve the problems of water vapor sensitivity, unstable polyamic acid solution, etc., and achieve the effect of structural stability

Inactive Publication Date: 2017-09-08
刘庆祝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the polyamic acid solution is unstable and sensitive to water vapor, and often decomposes during storage.

Method used

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Embodiment Construction

[0022] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] The invention provides a technical solution: a method for preparing a thin electronic-grade polyimide film, comprising the following steps:

[0024] 1) Methyl esterification of 3,4'-BPDA and 4-PEPA to obtain white and light yellow esterified powders (PDE and PEPE). Then add BPDE, PEPE and diamine into the solvent according to a certain proportion, heat and reflux and stir for 2 hours to obtain a brown-red synthetic polyamic acid solution;

[0025] 2) Synthetic polyamic acid solution undergoes filtration, vacuum defoaming, fi...

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PUM

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Abstract

The invention discloses a preparation method of a thin electronic polyimide film. The method comprises the following specific steps of 1) performing methyl esterification on 3,4'-BPDA and 4-PEPA to prepare white and yellowish esterification powder (PDE and PEPE), adding BPDE, PEPE and diamine to a solvent at a certain ratio, and performing heating and reflux stirring for 2h to obtain a red-brown synthetic polyamide acid solution, 2) performing filtration, vacuum defoamation, cast film forming, two-way stretch, high-temperature thermoforming treatment, corona treatment and reeling on the synthetic polyamide acid solution to prepare the electronic polyimide film with excellent physical and mechanical properties, and 3) allowing a surface organification modified superfine inorganic crystal whisker and / or a nano particle material and multi-polyamide acid to form in-situ micro-nano compounding to imidize the polyimide film by virtue of crushing and cavitation of high-energy density ultrasonic.

Description

technical field [0001] The invention relates to the technical field of polyimide film preparation and production, in particular to a method for preparing a thin electronic-grade polyimide film. Background technique [0002] Polyimide film is a new type of high temperature resistant organic polymer film. It is formed by polycondensation and salivation into a film, and then imidized. It is the best film insulating material in the world at present, with excellent mechanical properties, electrical properties, chemical stability and high radiation resistance. High and low temperature resistance (-269°C to +400°C). [0003] In 1959, DuPont Company of the United States first synthesized aromatic polyimide. In 1962, it tried to make polyimide film (PI film), and began production in 1965. The brand name is KAPTON. [0004] At the end of the 1960s, my country could produce polyimide films in small batches, and now it has been widely used in various fields such as aviation, navigatio...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08J5/18C08L79/08C08K7/08C08K7/10B29D7/01
CPCC08G73/1007B29D7/01C08G73/1089C08J5/18C08K7/08C08K7/10C08K2201/014C08L79/08C08L2203/16
Inventor 商建华孙大山李树青刘冰海
Owner 刘庆祝
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