Production of water-expandable styrene polymers

US6555638B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Achim Datko · Leimen, DE
• Peter Dodel · Edenkoben, DE
• Klaus Hahn · Lampertheim, DE

Key dates

• Filing date: Dec 28, 2001
• Grant date: Apr 29, 2003
• Expiry date: Dec 28, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2325/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for the preparation of styrene polymers containing water as the sole expanding agent by polymerization of styrene in aqueous suspension in the presence of an amphiphilic organic emulsifier which carries both hydrophilic and hydrophobic groups, or a polar group-containing, water-miscible polymer.