Thermoplastic molding materials

US4442263A · kind A · utility

Assignee

• BASF SE

Inventors

• Franz Brandstetter · Neustadt, DE
• Juergen Hambrecht · Heidelberg, DE
• Rudolf Stephan · Ludwigshafen, DE
• Heinz-Juergen Overhoff · Bischofswerda, DE
• Josef Schwaab · Maikammer, DE
• Claus Bernhard · Eisenberg, DE
• Johann Swoboda · Ludwigshafen, DE
• Adolf Echte · Ludwigshafen, DE

Key dates

• Filing date: Jul 16, 1982
• Grant date: Apr 10, 1984
• Expiry date: Jul 16, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L51/003
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermoplastic molding materials contain a copolymer A and a graft copolymer B. The copolymer A is a hard component comprising one or more copolymers of styrene and/or .alpha.-methylstyrene with from 20 to 40% by weight of acrylonitrile. The graft copolymer B comprises one or more crosslinked acrylate polymer with a mean particle size of 0.5-0.8 .mu.m (d.sub.50 value of the cumulative mass distribution), a particle distribution, expressed by the ratio ##EQU1## in the range Q.gtoreq.0.6, and a glass transition temperature Tg below 0.degree. C. A mixture of styrene and acrylonitrile in a weight ratio from 88:12 to 65:35 is grafted onto this rubber.