Flameproofed chlorine-and bromine-free molding composition

US5276256A · kind A · utility

Assignee

• BASF SE

Inventors

• Norbert Niessner · Friedelsheim, DE
• Rainer Neumann · Krefeld, DE
• Karl Ruppmich · Ludwigshafen, DE
• Friedrich Seitz · Friedelsheim, DE
• Doris Zeltner · Wasserburg am Inn, DE

Key dates

• Filing date: Sep 25, 1992
• Grant date: Jan 4, 1994
• Expiry date: Sep 25, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/902
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A molding composition containing, based on the total weight of the composition: PA1 A) at least 40% by weight of at least one halogen-free polycarbonate; PA1 B) 5-40% by weight of at least one halogen-free graft copolymer composed of; PA1 1) 40-80% by weight of an elastomer with a glass transition temperature below 0.degree. C., which elastomer is composed of, at least 50% by weight of a diene or of an at least C.sub.4 -alkyl acrylate, 1-40% by weight of a halogen-free phosphorus compound of the formula ##STR1## 2) 20-60% by weight of a shell composed of, 40-98% by weight of styrene, .alpha.-alkylstyrene, nuclear-substituted styrene and/or C.sub.1 -C.sub.8 -alkyl (meth)acrylate, and 2-60% by weight of (meth)acrylonitrile and/or maleic anhydride; PA1 C) 5-40% by weight of a halogen-free thermoplastic copolymer composed of, 50-95% by weight of styrene, .alpha.-alkylstyrene, nuclear-substituted styrene and/or C.sub.1 -C.sub.8 -alkyl (meth)acrylates, and 5-50% by weight of (meth)acrylonitrile and/or maleic anhydride; PA1 D) 1-50% by weight of a halogen-free phosphorus compound of the formula ##STR2## E) up to 5% by weight of a polytetrafluoroethylene with a median particle size of 50-2…