Method of making free-standing polyimide film

Details Method of making free-standing polyimide film Method of making free-standing polyimide film

1995-11-14

1997-02-18

Lusignan, Michael

Stock material or miscellaneous articles

Composite

Of polyimide

427154, 427155, 427156, 427240, 427358, 528322, B32B 2700, B32B 2706

Patent

active

056040415

ABSTRACT:
Disclosed is a method of making a free-standing polyimide film. A solution is prepared of a polyamic acid 20 to 98% imidized in an organic solvent and a coating of the solution is applied to a non-stick substrate. The coating is heated to a temperature high enough to evaporate all but 1 to 20 wt % of the solvent and form a film. The film is removed from the substrate and is heated to evaporate the solvent to less than 1000 ppm.

REFERENCES:
patent: 3759913 (1973-09-01), Blackley
patent: 4543295 (1985-09-01), St. Clair et al.

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