Transparent, impact-resistant polystyrene on a styrene-butadiene block copolymer basis

US6593430B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Konrad Knoll · Mannheim, DE
• Wolfgang Fischer · Meerbusch, DE
• Hermann Gausepohl · Mutterstadt, DE
• Jurgen Koch · Refrath, DE
• Josef Wunsch · Schifferstadt, DE
• Paul Naegele · Schifferstadt, DE

Key dates

• Filing date: Sep 18, 2001
• Grant date: Jul 15, 2003
• Expiry date: Sep 18, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L53/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Block copolymers comprise at least two hard blocks S1 and S2 made from vinylaromatic monomers and, between these, at least one random soft block B/S made from vinylaromatic monomers and from dienes, where the proportion of the hard blocks is above 40% by weight, based on the total block copolymer.