Process for holding and foaming thermoplastic polyphenylene sulp

Details Process for holding and foaming thermoplastic polyphenylene sulp Process for holding and foaming thermoplastic polyphenylene sulp

1987-06-29

1989-02-14

Anderson, Philip

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 467, 264 54, 264DIG5, 521121, 521180, 521189, C08J 906, C08G 7514, B29C 6722

Patent

active

048046892

ABSTRACT:
The present invention relates to a process for molding a foamed article comprising mixing a polyphenylene sulfide resin with about 0.1 to 10% of an oligomeric sulfone carbonate as a foaming agent and with 0.1 to 2% of a basic catalyst at a temperature of about 150.degree. to 180.degree. C. and then heating the resulting mixture at a temperature of 280.degree.-350.degree. C. to affect a reaction mixture and introducing the reaction mixture into a suitable mold for producing a foamed article.

REFERENCES:
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patent: 4032683 (1977-06-01), Coale
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patent: 4471247 (1984-09-01), Cotton
patent: 4500702 (1985-02-01), Ostlinning et al.
patent: 4595748 (1986-06-01), Ostlinning et al.
patent: 4663430 (1987-05-01), Ostlinning et al.
patent: 4695594 (1987-09-01), Pressman
patent: 4714576 (1987-12-01), Cotton et al.

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