Bead-like expandable molding materials having high heat distorti

Details Bead-like expandable molding materials having high heat distorti Bead-like expandable molding materials having high heat distorti

1990-01-31

1992-03-03

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

050933752

ABSTRACT:
Bead-like expandable molding materials having high heat distortion resistance contain from 80 to 99% by weight of a styrene polymer, from 1 to 20% by weight of poly-(2,6-dimethyl)-1,4-diphenylene ether and from 3 to 10% by weight of a C.sub.3 -C.sub.6 -hydrocarbon as a blowing agent and may contain conventional additives. They are obtained by suspension polymerization of a solution of the polyphenylene ether in styrene.

REFERENCES:
patent: 4727093 (1988-02-01), Allen et al.
patent: 4874796 (1989-10-01), Allen et al.
patent: 4927858 (1990-05-01), Joyce et al.
patent: 4927859 (1990-05-01), Weber et al.
Patent Abstracts of Japan, JP-A-52 101-268, Aug. 25, 1977, "Heat Resistant Foams Obtained Using Controlled Amounts of Foaming Agent From Styrene (Co)Polymer and Polyphenylene Ether Resin Mixture".

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