Thermoplastic elastomer

US6031053A · kind A · utility

Assignee

• BASF SE

Inventors

• Konrad Knoll · Mannheim, DE
• Hermann Gausepohl · Mutterstadt, DE
• Norbert Niessner · Friedelsheim, DE
• Dietmar Bender · Schifferstadt, DE
• Paul Naegele · Schifferstadt, DE

Key dates

• Filing date: Dec 17, 1996
• Grant date: Feb 29, 2000
• Expiry date: Dec 17, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2353/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An elastomeric block copolymer comprising at least one block A having polymerized units of a vinylaromatic monomer and forming a rigid phase and at least one elastomeric block B/A having polymerized units of both vinylaromatic monomers and of a diene and forming a flexible phase, and glass transition temperature Tg of the block A being above 25.degree. C. and that of the block B/A being below 25.degree. C. and the phase volume ratio of block A to block B/A being chosen so that the amount of the rigid phase in the total block copolymer is 1 to 40% by volume and the amount of the diene is less than 50% by weight.