ABS molding materials having a bimodal rubber particle size distribution

US5434218A · kind A · utility

Assignee

• BASF SE

Inventors

• Ehrenfried Baumgartner · Bad Dürkheim, DE
• Juergen Hofmann · Salzwedel, DE
• Rudolf H. Jung · Worms, DE
• Rainer Moors · Schifferstadt, DE
• Hansjoerg Schaech · Ludwigshafen, DE

Key dates

• Filing date: Apr 11, 1994
• Grant date: Jul 18, 1995
• Expiry date: Apr 11, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Rubber-modified, impact-resistant molding materials contain, based on the sum of A, B1 and B2, PA0 A: from 70 to 98% by weight of a polymer matrix A formed by free radical polymerization of a mixture of from 60 to 90% by weight of styrene and from 10 to 40% by weight of acrylonitrile, PA0 B1: from 1 to 29% by weight of a particulate, first graft copolymer B1 which is distributed in the matrix A and consists of a grafting base of polybutadiene and grafts of a copolymer of styrene and acrylonitrile having a mean particle size of about 100-500 nm, and PA0 B2: from 1 to 29% by weight of a particulate, second graft copolymer B2 distributed in the matrix A and consisting of a grafting base of polybutadiene and grafts of a copolymer of styrene and acrylonitrile having a mean particle size of from 600 to 10,000 nm, as obtained if both graft copolymers have been prepared by solution and/or mass polymerization and have been incorporated in the polymer matrix in a conventional manner.