Process for preparing polyamide-imide foam

Details Process for preparing polyamide-imide foam Process for preparing polyamide-imide foam

1988-05-23

1990-10-02

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 461, 264 48, 264 53, 264 54, 264148, 26421123, B29B 1110

Patent

active

049605496

ABSTRACT:
This invention relates to preparation of polyamide-imide foam by extruding foamable composition comprising polyamide-imide and volatiles into a confined expansion zone, expanding the composition therein and cooling the result. The resulting foams are essentially open-celled and exhibit good strength, insulating properties and other desirable features.

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