Method for carrying out the anionic polymerization of vinylaromatic monomers

US6686423B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Philippe Desbois · Maikammer, DE
• Volker Warzelhan · Bad Dürkheim, DE
• Christian Schade · Ludwigshafen, DE
• Michel Fontanille · Montmorency, FR
• Alain Deffieux · Talence, FR
• Stephane Menoret · Bordeaux, FR

Key dates

• Filing date: May 6, 2002
• Grant date: Feb 3, 2004
• Expiry date: May 6, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F297/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for the anionic polymerization of vinylaromatic monomers or dienes in the presence of a lithium organyl or lithium alcoholate and a magnesium and/or an aluminum compound, a sterically hindered phenol or amine is added.