Expandable polymers in particle form

US4927859A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinz Weber · Uerdingen, DE
• Eckhard Nintz · Ludwigshafen, DE
• Manfred Walter · Nuremberg, DE
• Dieter Ballweber
• Bertram Ostermayer · Bad Dürkheim, DE

Key dates

• Filing date: May 19, 1989
• Grant date: May 22, 1990
• Expiry date: May 19, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/91
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Expandable polymers in particle form for the preparation of foams having high heat distortion resistance contain from 20 to 94.9% by weight of a styrene polymer, from 0.1 to 75% by weight of a polyphenylene ether and from 5 to 20% by weight of a blowing agent mixture of aliphatic or cycloaliphatic hydrocarbons on the one hand and aromatic hydrocarbons, alcohols, ketones, ethers, esters and/or chlorohydrocarbons on the other hand.