Thermoplastic polyester molding materials having low temperature impact strength

US4912163A · kind A · utility

Assignee

• BASF SE

Inventors

• Dietrich Lausberg · Ludwigshafen, DE
• Juergen Vietmeier · Monsheim, DE
• Graham E. McKee · Ludwigshafen, DE
• Hans-Georg Braun · Havelsee, DE
• Peter Hildenbrand · Karlsruhe, DE

Key dates

• Filing date: Aug 7, 1989
• Grant date: Mar 27, 1990
• Expiry date: Aug 7, 2009

Classification

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

Abstract

Thermoplastic polyester molding materials essentially contain PA1 (A) from 20 to 89% by weight of one or more aliphatic polyesters of an aromatic dicarboxylic acid, PA1 (B) from 10 to 79% by weight of one or more aromatic polycarbonates and PA1 (C) from 1 to 40% by weight of an elastomer or of a mixture of elastomers consisting of PA2 CA from 5 to 100% by weight of an elastomeric graft polymer composed of PA3 CA1 not less than 50% by weight of a grafting base having a glass transition temperature T.sub.g of less than -20.degree. C., PA3 CA2 from 5 to 20% by weight of a first graft shell consisting of a mixture of a C.sub.1 -C.sub.8 -alkyl ester of acrylic acid and a vinylaromatic in a weight ratio of from 5:95 to 70:30 and PA3 CA3 from 10 to 30% by weight of a second graft shell consisting of one or more polymers having a glass transition temperature T.sub.g above 20.degree. C. and PA2 CB from 0 to 95% by weight of an ethylene copolymer composed of CB1 from 40 to 99% by weight of ethylene and CB2 from 1 to 60% by weight of one or more comonomers containing carboxyl groups and/or carboxyl group derivatives, the sum of A to C, CA and CB, CA1 to CA3 and of CB1 and CB2 being 100% by we…