Process for foaming polymeric compositions with organic azo comp

Details Process for foaming polymeric compositions with organic azo comp Process for foaming polymeric compositions with organic azo comp

1987-08-12

1988-05-10

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521145, 521146, 521178, 521180, C08J 910

Patent

active

047436239

ABSTRACT:
Azo compounds such as 2-ethyl-6-methyl-phenylazo-t-butane which contain an aromatic moiety bridged to one or more alkyl moieties by azo groups are useful blowing agents in a novel process for foaming compositions of polymers such as polycarbonates.

REFERENCES:
patent: 3993609 (1976-11-01), Kamens et al.
patent: 4029615 (1977-06-01), Kamens et al.
Curtin et al, "Reaction of Organometallic Compounds with Diazonium Salts" 21 J. Org. Chem. 1221 (1956).
"Polar Factors in w/Radical Dissociations, Kinetics of Decomposition of meta-substituted Phenylazotriphenylmethanes" 79 J. Am. Chem. Soc. 4104/1957.
"Kerber, Nuyken & Pasupathy" 170 Makromol Chemie 155, 158 (1972) Table I.

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