Process for producing copolymer films

Details Process for producing copolymer films Process for producing copolymer films

B - Operations, Transporting

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B29C 39/14 (2006.01) B29D 7/01 (2006.01) C08J 3/09 (2006.01) C08J 5/18 (2006.01) H05K 1/03 (2006.01)

Patent

CA 1211264

- 42 - Abstract of the Disclosure A process for producing polyamide-polyimide block copolymer films or polyamide-polyimide copolymer films having excellent thermal resistance and mechanical strength, which comprises casting a solvent solution of a polyamide-polyamide acid block copolymer or a polyamide-polyamide acid copolymer on a substrate, converting the deposited thin layer of the solution into a self-supporting film, regulating the residual solvent content of the film by heating or other means, if necessary, and then heating the film at a temperature of 320° to 500°C for a specified period of time.

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