Composition of styrene-acrylonitrile copolymer matrix with particles of graft copolymer and crosslinked copolymer

US5631323A · kind A · utility

Assignee

• BASF SE

Inventors

• Norbert Güntherberg · Speyer, DE
• Ekkehard Jahns · Weinheim, DE
• Wolfgang Fischer · Meerbusch, DE
• Graham E. McKee · Ludwigshafen, DE
• Bernhard Rosenau · Neustadt, DE

Key dates

• Filing date: Dec 4, 1995
• Grant date: May 20, 1997
• Expiry date: Dec 4, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L51/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermoplastic molding materials prepared A) from 35 to 99.5% by weight of a matrix copolymer (A) of PA1 a.sub.1) from 50 to 95% by weight of styrene and/or .alpha.-methylstyrene, PA1 a.sub.2) from 5 to 50% by weight of acrylonitrile and PA1 a.sub.3) from 0 to 20% by weight of further comonomers B) from 0 to 50% by weight of a particulate graft copolymer (B) which is insoluble in (A), has a median particle diameter of from 0.03 to 1 .mu.m and prepared PA1 b.sub.1) from 30 to 80% by weight of a core comprising an elastomeric polymer having a glass transition temperature of less than -10.degree. C. and PA1 b.sub.2) from 20 to 70% by weight of a graft shell comprising a polymer which is compatible or partly compatible with (A) and C) from 0.5 to 30% by weight of a particulate crosslinked copolymer (C) which is insoluble in (A), has a median particle diameter of from 0.5 to 50 .mu.m and comprises PA1 c.sub.1) from 50 to 89.95% by weight of styrene and/or .alpha.-methylstyrene, PA1 c.sub.2) from 10 to 50% by weight of acrylonitrile, PA1 c.sub.3) from 0.05 to 5% by weight of a polyfunctional, crosslinking monomer, PA1 c.sub.4) from 0 to 10% by weight of a monomer which contains acidic or …