Method for preparing (co) polymers by metal-free anionic polymerization in the presence of a phosphonium cation containing at least one annellated aromatic ring

US6143847A · kind A · utility

Assignee

• BASF SE

Inventors

• Thieo E. Hogen-Esch · South Pasadena, US
• Dimo K. Dimov · Los Angeles, US
• Stephan Jungling · Mannheim, DE
• Volker Warzelhan · Bad Dürkheim, DE
• Hermann Gausepohl · Mutterstadt, DE

Key dates

• Filing date: Apr 7, 1997
• Grant date: Nov 7, 2000
• Expiry date: Apr 7, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation containing at least one annellated aromatic ring as substituent on the phosphorous atom.