Unsaturated, elastomeric, asymmetrically coupled block copolymer, a single batch process for its manufacture and its use for the production of tire components

US5147939A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Walter Hellermann · Dorsten, DE
• Christoph Herrmann · Aachen, DE
• Karl-Heinz Nordsiek
• Jurgen Wolpers · Bochum, DE
• Hans-Bernd Fuchs · Marl, DE

Key dates

• Filing date: Oct 4, 1989
• Grant date: Sep 15, 1992
• Expiry date: Oct 4, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S152/905
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An unsaturated, elastomeric, asymmetrically coupled block copolymer of the formula: EQU (A--B).sub.n --X--(B).sub.m, wherein block A is a block of polybutadiene having an 8 to 60% content of uniformly distributed vinyl groups and block B is a homopolymer of isoprene or a copolymer of at leat 10% isoprene units with 0 to 60% butadiene units and up to 45% styrene units and X is a radical of a coupling agent, and (m-n).gtoreq.0 while (m+n) ranges from 3 to 25.