AB block copolymers based on butadiene, isoprene and styrene, process for their preparation and their use

US4981911A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

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

Key dates

• Filing date: Jul 8, 1988
• Grant date: Jan 1, 1991
• Expiry date: Jul 8, 2008

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60C1/0016
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An unsaturated elastomeric AB block copolymer, comprising: PA1 (i) 45-85 wt. % 1,3-butadiene, PA1 (ii) 5-40 wt. % isoprene, and PA1 (iii) up to 30 wt. % styrene, wherein said AB block copolymer comprising: PA1 40-80 wt. % of a block A, said block A comprising butadiene monomer units and having a content of uniformly distributed vinyl groups of 8-60 wt. %, and PA1 60-20 wt. % of a block B, said block B comprising 0-60 wt. % 1,3-butadiene, at least 10 wt. % isoprene and up to 45 wt. % styrene monomer units, wherein the butadiene and isoprene monomer units have a vinyl group content of 75-90 wt. %.