Impact modified carbonate polymer composition having improved resistance to degradation and improved thermal stability
AssigneeGeneral Electric Company
InventorsJames L. DeRudder, Robert R. Gallucci
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Abstract
An aromatic carbonate polymer composition having improved thermal stability consisting of an aromatic carbonate polymer such as a polycarbonate or polycarbonate/polyester blend and an impact modifier which is free of alkali materials which catalytically degrade a polycarbonate. Also an impact modifier which is preferably of a shell-core structure prepared by the emulsion polymerization process and has a pH of about 3 to about 8. A preferred emulsifier is an alkyl sulfonate having an alkyl group of C6-C18 carbons.
Claims22
An impact resistant carbonate polymer composition having improved thermal stability and improved resistance to polymer degradation comprising in admixture an aromatic polycarbonate and an impact modifier prepared by an emulsion polymerization process wherein the impact modifier is essentially free of polymerization aids that catalytically degrade the aromatic polycarbonate.
A shell-core impact modifier prepared by an emulsion polymerization process comprising a rubbery core and a thermoplastic polymer shell, said shell-core impact modifier being essentially free of residual emulsion polymerization emulsifiers which catalytically degrade an aromatic polycarbonate.
Dependencies are inferred from the claim text.