Impact-resistant, thermoplastic polyester molding materials

US4666973A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerhard Heinz · Bad Dürkheim, DE
• Graham E. McKee · Ludwigshafen, DE
• Georg N. Simon · Altstätten, CH
• Friedrich Kleber · Worms, DE
• Manfred Knoll · Monsheim, DE

Key dates

• Filing date: Dec 2, 1985
• Grant date: May 19, 1987
• Expiry date: Dec 2, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L67/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Impact-resistant thermoplastic polyester molding materials are prepared by thoroughly mixing PA0 A. from 52 to 99 parts by weight of a melt of one or more polyalkylene terephthalates with PA0 B. from 1 to 48 parts by weight of one or more elastomeric graft polymers prepared by emulsion polymerization and composed of PA1 1. from 70 to 90% by weight of a grafting base consisting of elastomeric polymers having a gel content of not less than 80% and a glass transition temperature Tg of less than -20.degree. C. and PA1 2. from 10 to 30% by weight of a grafted shell consisting of one or more polymers having a glass transition temperature Tg greater than 40.degree. C., in the form of an aqueous dispersion in which not less than 80% of the particles of graft polymer B have a size of from 0.05 to 0.15 .mu.m, with simultaneous removal of the water which vaporizes.