Manufacture of styrene suspension polymers

US4129706A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Aug 17, 1977
• Grant date: Dec 12, 1978
• Expiry date: Aug 17, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2325/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for the manufacture of styrene polymers optionally containing blowing agent by polymerization in aqueous suspension using as the suspension stabilizer a calcium phosphate which after its manufacture by precipitation has been heated in aqueous dispersion for at least 2 hours at from 70.degree. to 130.degree. C. The styrene polymers may be used for the manufacture of foams.