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

US4814386A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

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

Key dates

• Filing date: Aug 14, 1987
• Grant date: Mar 21, 1989
• Expiry date: Aug 14, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/914
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

ABC block copolymers on the basis of butadiene, isoprene and optionally styrene, are provided by a polymerization process wherein the resultant block copolymer comprises: PA1 about 40 to 75 wt % of a block A based on butadiene (uniformly distributed vinyl group content less than about 15 wt %), PA1 up to about 25 wt % of a block B based on butadiene and isoprene (vinyl content less than about 15 wt %) or based on butadiene (vinyl content more than about 75 wt %) PA1 about 20 to 55 wt % of a block C based on butadiene and isoprene (vinyl content more than about 75 wt %). The ABC block copolymers are useful for the production of tire treads.