Polymer foam, thermoformed shapes thereof and methods of forming

Details Polymer foam, thermoformed shapes thereof and methods of forming Polymer foam, thermoformed shapes thereof and methods of forming

1985-07-29

1986-07-01

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 53, 264DIG5, 521 79, 521 98, 521139, C08J 914

Patent

active

045981019

ABSTRACT:
A polyphenylene oxide/polystyrene polymer blend foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming said foam comprising combining the polymer blend with a blowing agent member selected from the group consisting of methylene chloride, chloroform, 1,1,2-trichloroethane and mixtures thereof in molten form under pressure and extruding the same into a lower pressure region to form the foam.

REFERENCES:
patent: 4097425 (1978-06-01), Niznik
patent: 4280950 (1981-07-01), Nagata et al.
patent: 4334030 (1982-06-01), Kochanowski
patent: 4360486 (1982-11-01), DiBiasi et al.

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