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

1989-07-19

1990-02-20

Kight, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 60, 521119, 522 80, 522112, 522178, C08J 900

Patent

active

049027212

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.

REFERENCES:
patent: 4600614 (1986-07-01), Lancaster et al.
patent: 4601948 (1986-07-01), Lancaster et al.
patent: 4671992 (1987-06-01), Lancaster et al.
patent: 4678713 (1987-07-01), Lancaster et al.
patent: 4728566 (1988-03-01), Lancaster et al.
CA 109(6):38945u, "Preparation of Rigid Foams in the Presence of Microwaves or High-Frequency Fields".

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