Extrudable foamable composition comprising an olefin polymer, a

Details Extrudable foamable composition comprising an olefin polymer, a Extrudable foamable composition comprising an olefin polymer, a

1976-05-17

1977-04-26

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25E, 260 25HA, 260876B, 260880B, 264 53, 264DIG5, 264DIG18, C08J 914

Patent

active

040200256

ABSTRACT:
Foams of mixtures of polyolefins and styrene polymers are produced by mixing the polymers with low-boiling expanding agents in the presence of a hydrogenated styrene/butadiene block polymer or a graft polymer of styrene on a polyolefin at temperatures above the softening point of the polymer mixture and under a pressure which prevents foaming of the mixture, followed by extrusion of the foamable mixture into a zone of lower pressure. The resulting foams are resistant to organic solvents.

REFERENCES:
patent: 3250731 (1966-05-01), Buhl et al.
patent: 3810964 (1974-05-01), Ehrenfreund

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