Manufacture of crosslinked foamable moldings from olefin polymers

US4166890A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Fried · Heidelberg, DE
• Ludwig Zuern
• Erhard Stahnecker · Heidelberg, DE

Key dates

• Filing date: Mar 13, 1978
• Grant date: Sep 4, 1979
• Expiry date: Mar 13, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/909
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the manufacture of cross-linked foamable moldings from olefin polymers, wherein the olefin polymer is mixed with PA1 (a) a solid organic blowing agent which eliminates gases when heated, PA1 (b) an organic peroxide, PA1 (c) conventional additives and PA1 (d) an activating organic compound which lowers the decomposition temperature of the peroxide, And the mixture is molded thermoplastically and is crosslinked below the decomposition temperature of the blowing agent but above the decomposition temperature of the activated peroxide. The organic activator is preferably a transition metal salt of a long-chain fatty acid. The moldings may be used for the manufacture of foams, for example for insulating purposes.