Foamable thermoplastic polymers and a method for foaming

Details Foamable thermoplastic polymers and a method for foaming Foamable thermoplastic polymers and a method for foaming

1987-05-04

1989-08-01

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 53, 521 55, 521 74, 264 41, 264 451, 264 452, 264 454, 264 465, 264 50, 264 51, C08J 900

Patent

active

048534200

ABSTRACT:
Foamed products are prepared by subjecting a crosslinked polymer such as an ethylene-carbon monoxide copolymer susceptible to heating by high frequency electromagnetic radiation such as microwave or radio frequency which has been imbibed or impregnated with a suitable mechanical or physical blowing agent such as a halogenated hydrocarbon to sufficient high frequency electromagnetic radiation to cause foaming of the polymer.

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patent: 4716062 (1987-12-01), Klein

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