Process for producing foamed elastomeric compositions

Details Process for producing foamed elastomeric compositions Process for producing foamed elastomeric compositions

1986-12-31

1988-10-11

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 79, 521 94, 521909, C08J 910

Patent

active

047771887

ABSTRACT:
Foamed elastomeric compositions are produced by a process comprising the steps of (A) forming a blend comprised of (1) a foamable, curable elastomer; (2) a curative; and (3) a blowing agent composition consisting essentially of (i) azodicarbonamide and (ii) at least one member selected from the group consisting of zinc salt of C.sub.1 -C.sub.6 organic acids and C.sub.1 -C.sub.6 carboxamides; and (B) heating such blend to between about 130.degree. C. and about 170.degree. C. for a period of time sufficient to foam and cure such blend.

REFERENCES:
patent: 3846350 (1974-11-01), Schentger
patent: 4312776 (1982-01-01), Puri et al.
patent: 4438223 (1984-03-01), Hunter
patent: 4444679 (1984-04-01), Rowland et al.
patent: 4472536 (1984-09-01), Rowland et al.
patent: 4482650 (1984-11-01), Rowland et al.
patent: 4554294 (1985-11-01), Hunter et al.
"Celogen-AZ" by Barnhart, Compounding Research Report #38, Naugatuck Chemical, U.S. Rubber Co, pp. 1-13.
Dollimore et al, J. of Inorganic Nuclear Chemistry, 29, 621-627 (1967).
Djega-Mariadassou et al, Bull. Soc. Chim, France, 9, pp. 3166-3173 (1971).

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