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

US5096973A · 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: Oct 1, 1990
• Grant date: Mar 17, 1992
• Expiry date: Oct 1, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/931
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An unsaturated, elastomeric ABC block copolymer comprised of the monomer units of 40 to 80% of 1,3-butadiene, 5 to 40% of isoprene and 2 to 30% of styrene, said copolymer comprising i) 40 to 75% of block A which contains styrene and butadiene units or isoprene and butadiene units with a content of distributed vinyl or isopropenyl groups of less than 15%, iia) up to 25% of a block B which contains styrene and butadiene units or isoprene and butadiene units with a vinyl or isopropenyl content of more than 70%, or iib) up to 25% of a block B' which contains styrene, isoprene and optionally butadiene units with a content of homogeneously distributed isopropenyl or vinyl groups of less than 15%, and iii) 20 to 55% of a block C which contains styrene and isoprene units and optionally butadiene units with an isopropenyl or vinyl content of more than 70%.