Manufacture of expandable styrene polymers

US4036794A · kind A · utility

Assignee

• BASF SE

Inventors

• Hans G. Keppler
• Erhard Stahnecker · Heidelberg, DE
• Rolf Moeller · Ludwigshafen, DE

Key dates

• Filing date: Oct 8, 1976
• Grant date: Jul 19, 1977
• Expiry date: Oct 8, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2325/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the manufacture of expandable styrene polymers by suspension polymerization of the monomers in the presence of blowing agents and suspension stabilizers, the latter having been manufactured by polymerization of vinyl monomers in the presence of vinylpyrrolidone polymers. The expandable styrene polymers can be further processed to give foams.