Production of foam sheets of high compressive strength

US5182308A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinz Voelker · Schifferstadt, DE
• Gerhard Alicke · Worms, DE
• Horst Schuch · Heidelberg, DE
• Manfred Weilbacher · Bischofswerda, DE
• Reinhold Weber · Biberach an der Riß, DE

Key dates

• Filing date: Jul 1, 1991
• Grant date: Jan 26, 1993
• Expiry date: Jul 1, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S264/05
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Foam sheets of high compressive strength are produced by extruding a mixture of a styrene polymer and from 5 to 16% by weight of a blowing agent mixture containing PA1 a) from 3 to 70% by weight of an alcohol or ketone having a boiling point of from 56.degree. to 100.degree. C., PA1 b) from 5 to 50% by weight of carbon dioxide and PA1 c) from 0 to 90% by weight of a saturated C.sub.3 - to C.sub.5 -hydrocarbon and/or of a hydrogen-containing chlorofluorocarbon or fluorinated hydrocarbon boiling at from -30.degree. to +30.degree. C.