Expandable styrene polymers and their preparation

Details Expandable styrene polymers and their preparation Expandable styrene polymers and their preparation

1990-02-28

1991-01-08

Foelak, Morton

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, 521139, C08J 918, C08J 920

Patent

active

049836390

ABSTRACT:
Expandable styrene polymers of from 95 to 99.5% by weight of polystyrene and from 0.15 to 5% by weight of a styrene-soluble styrene/acrylonitrile copolymer having a total content of not less than 0.15% by weight of acrylonitrile, which contain from 3 to 10% by weight of a C.sub.3 -C.sub.6 -hydrocarbon and may contain conventional additives, give foams which do not shrink. The said styrene polymers can be prepared by suspension polymerization of a solution of the styrene/acrylonitrile copolymer in styrene.

REFERENCES:
patent: 2700185 (1955-01-01), Lee
patent: 3361687 (1968-01-01), Stahnecker
patent: 4708968 (1987-11-01), Ingram
patent: 4937272 (1990-06-01), Sumitomo
Chemical Abstracts, vol. 90, No. 8, Feb. 1979, p. 40, Abstract No. 55835q.

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