The Dow Chemical Company

Edwin J Wilson

Richard A Wolf

Samuel A Ogoe

Oliver C Ainsworth

James R Bethea

John W Muskopf

Philip J Brondsema

David W Liou

Craig L Werling

John W Cocup

Susan Wollowitz

Michael J Fazio

Joseph L Allison

Stephen R Ellebracht

David R Flores

A blend of polycarbonate and chlorinated polyethylene which has a desirable balance of impact and ignition resistance properties.

Blends of polycarbonate and chlorinated polyethylene

Hydrazone compounds having two organic moieties joined by a hydrazone group, such as phenylacetone t-butyl hydrazone, are useful blowing agents for foaming polymers, such as bisphenol A/phosgene polycarbonate at temperatures above about 280.degree. C., and particularly at about 300.degree. C. to about 310.degree. C. Polycarbonate polymers formed using the hydrazones as foaming agents show a high impact strength.

Process for foaming polymer compositions with hydrazone compounds and

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.

Process for foaming polymeric compositions with organic azo compounds

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Midland, MI, United States of America

Edwin J Wilson