Thermoplastic foamable blends

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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521 95, 521139, 521143, 521145, 521146, 521180, 521184, 521189, C08J 908, C08J 910

Patent

active

043340300

ABSTRACT:
Foamable blends are provided of high performance thermoplastic polymers such as polyphenylene oxides, polystyrenes, etc., and an effective amount of a first blowing agent which is an amide derivative of azodicarboxylic acid and a second blowing agent which is a dihydrooxadiazinone.

REFERENCES:
patent: 3278466 (1966-10-01), Cram et al.
patent: 3888801 (1975-06-01), Hunter et al.
patent: 4097425 (1978-06-01), Niznik
patent: 4174432 (1979-11-01), Niznik

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