Preparation of foams having a high compressive strength

Details Preparation of foams having a high compressive strength Preparation of foams having a high compressive strength

1988-12-02

1991-04-09

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 51, 264 53, 521 81, 521 97, C08J 908

Patent

active

050065661

ABSTRACT:
Foams having high compressive strength are obtained by extrusion of a mixture of a styrene polymer and from 3 to 9% by weight of a blowing agent consisting of from 80 to 100% by weight of CO.sub.2 and from 0 to 20% by weight of one or more halohydrocarbons or hydrocarbons which are gaseous at room temperature, the mixture being extruded into a zone under from 0.1 to 2 bar gage pressure and the foam being allowed to stabilize under this pressure.

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patent: 4298702 (1981-11-01), Hahn et al.
patent: 4306036 (1981-12-01), Corbett
patent: 4312910 (1982-01-01), Suh et al.
patent: 4446253 (1984-05-01), Hahn et al.
patent: 4469651 (1984-09-01), Hahn et al.
patent: 4470938 (1984-09-01), Johnson
patent: 4473665 (1984-09-01), Martini-Vuedensky et al.
patent: 4636527 (1987-01-01), Suh et al.

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