Molding compositions of a styrene polymer, a polyolefin and a triblock styrenic copolymer

US5278232A · kind A · utility

Assignee

• BaseN Corporation · FI

Inventors

• Stefan Seelert · Bischofswerda, DE
• Hans Hoenl · Grünstadt, DE
• Bertram Ostermayer · Bad Dürkheim, DE
• Andreas Jung · Regensburg, DE
• Peter Klaerner · Battenberg, DE

Key dates

• Filing date: Nov 30, 1992
• Grant date: Jan 11, 1994
• Expiry date: Nov 30, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L23/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A thermoplastic molding material contains, in each case based on the sum of the constituents A, B and C, PA1 A: 10 to about 90% by weight of a styrene polymer A, PA1 B: 10 to about 90% by weight of a polyolefin B, and PA1 C: 1 to 20% by weight of an unsymmetrical linear three-block copolymer C of the structure S.sub.1 -D-S.sub.2, prepared by anionic polymerization from styrene and butadiene and/or isoprene, S.sub.1 and S.sub.2 each denoting a polystyrene block and D denoting a polydiene block, wherein the three-block copolymer C has a styrene content, based on C, of from 50 to 85% by weight and the terminal blocks S.sub.1 and S.sub.2 built up from styrene differ by at least 50% in their molecular weight.