Process for the manufacture of flame retardant polystyrene foams

US4298702A · kind A · utility

Assignee

• BASF SE

Inventors

• Klaus Hahn · Lampertheim, DE
• Klaus Hinselmann · Mutterstadt, DE
• Klaus Halbritter · Heidelberg, DE
• Walter Rebafka · Eppelheim, DE
• Heinz Weber · Uerdingen, DE

Key dates

• Filing date: Aug 4, 1980
• Grant date: Nov 3, 1981
• Expiry date: Aug 4, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/907
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

This invention relates to a process of making flame-retardant polystyrene foams by an extrusion process in which a stabilizer of a dialkyl-tin carboxylate or a mixture of a dialkyl tin carboxylate and a barium and/or cadmium carboxylate is added to the extrusion melt.