Expandable styrene polymers

US5880166A · kind A · utility

Assignee

• BASF SE

Inventors

• Guiscard Glück · Mainz, DE
• Klaus Hahn · Lampertheim, DE
• Rolf Henn · Ketsch, DE
• Karl-Heinz Wassmer · Mutterstadt, DE
• Hermann Gausepohl · Mutterstadt, DE
• Konrad Knoll · Mannheim, DE
• Karl-Heinz Batscheider · Mutterstadt, DE

Key dates

• Filing date: Apr 13, 1998
• Grant date: Mar 9, 1999
• Expiry date: Apr 13, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2351/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Expandable, rubber-modified styrene polymers for elastic polystyrene foams comprise PA1 a) a continuous phase comprising polystyrene or a styrene copolymer containing at most 50% of copolymerized comonomers and PA1 b) from 5 to 30% by weight of a butadiene-styrene block copolymer dispersed therein, and also a low-boiling blowing agent. The rubber particles have a compact lamellar structure without polystyrene inclusions. The expandable styrene polymers are prepared by polymerization of styrene in the presence of the block copolymer and impregnation with the blowing agent.