Composition

US4931503A · kind A · utility

Assignee

• General Electric Company · US

Inventors

• Omar M. Boutni · Greenwood, US
• Linda H. Nelson · Evansville, US
• Dwight J. Patterson · Murfreesboro, US
• Charles F. Pratt · Bergen op Zoom, NL
• Herman B. Savenije · Bergen op Zoom, NL

Key dates

• Filing date: Dec 28, 1988
• Grant date: Jun 5, 1990
• Expiry date: Dec 28, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L69/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A composition comprising an admixture of PA0 (a) an aromatic polycarbonate of intrinsic viscosity of from about 0.35 to about 0.41 dl/g, measured in methylene chloride at about 25.degree. C., said aromatic polycarbonate chain terminated with an endcapping agent which provides the polycarbonate with improved ductility and higher Tg when compared to a paratertiary butyl phenol encapped polycarbonate of the same intrinsic viscosity; PA0 (b) a core/shell copolymer comprising a conjugated diene with a Tg of less than or equal to -10.degree. C. as the core, said core being about 50 to 90 wt. percent of the core/shell polymer, and grafted thereon a shell comprised of an alkylalkacrylate and a styrenic, the core/shell copolymer present in such quantities to render the said composition ductile in the room temperature 1/8 inch thickness Notched Izod test system under ASTM D-256, and PA0 (c) a flame retardant combination comprising a flame retardant salt, said combination in quantities sufficient to achieve a UL-94 V-0 or V-1 rating in a molded part 90 mils thick.