Process for foaming thermoplastic

Details Process for foaming thermoplastic Process for foaming thermoplastic

1986-05-14

1988-06-14

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521134, 521138, 521139, 521180, 521182, C08J 910

Patent

active

047512504

ABSTRACT:
The present invention relates to an improvement in preparing foamed thermoplastic articles. It was found that a chemical blowing agent concentrate which contains a blowing agent which produces primary amines upon decomposition and additionally contains an anhydride compound which contains at least one cyclic anhydride in its structure, offers surprising advantages over the prior art process in terms of improved impact strength and process flexibility.

REFERENCES:
patent: 3888801 (1975-06-01), Hunter et al.
patent: 4207402 (1980-06-01), Sprenkle, Jr.
patent: 4420584 (1983-12-01), Rawlings

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