Expandable styrene polymers

US5525636A · kind A · utility

Assignee

• BASF SE

Inventors

• Rolf Henn · Ketsch, DE
• Klaus Hahn · Lampertheim, DE
• Wolfgang Loth · Bad Dürkheim, DE
• Walter Heckmann · Weinheim, DE
• Uwe Blumenstein · Ludwigshafen, DE
• Hans-Dieter Schwaben · Freisbach, DE
• Karl-Heinz Wassmer · Mutterstadt, DE
• Hermann Tatzel

Key dates

• Filing date: May 12, 1995
• Grant date: Jun 11, 1996
• Expiry date: May 12, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2351/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to expandable styrene polymers for elastic polystyrene foams, comprising PA1 a) from 75 to 98% by weight of polystyrene and/or a styrene copolymer containing at least 50% by weight of copolymerized styrene, PA1 b) from 2 to 25% by weight of at least one styrene-soluble elastomer, PA1 c) from 1 to 15% by weight, based on the sum of a) and b), of a low-boiling blowing agent, and, if desired, PA1 d) conventional additives in effective amounts, where the unfoamed beads have a structure in which the elastomer phase is dispersed in the polystyrene phase in the form of cell particles, and to foams and foam moldings produced therefrom.