Production of foam boards of high compressive strength using a blowing agent mixture

US5334337A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Nov 13, 1992
• Grant date: Aug 2, 1994
• Expiry date: Nov 13, 2012

Classification

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

Abstract

Foam boards 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 which contains PA0 a) from 3 to 70% by weight of an alcohol or ketone having a boiling point of from 56.degree. to 100.degree. C., PA0 b) from 0 to 50% by weight of carbon dioxide, PA0 c) from 0 to 88% by weight of a saturated C.sub.3 - to C.sub.5 -hydrocarbon, PA0 d) from 2 to 90% by weight of at least one fluorinated hydrocarbon which has a boiling point of from -30 .degree. to +30.degree. C.