Method for the production of block copolymers by retarded anionic polymerization

US6353056B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Konrad Knoll · Mannheim, DE
• Hermann Gausepohl · Mutterstadt, DE
• Volker Warzelhan · Bad Dürkheim, DE
• Christian Schade · Ludwigshafen, DE
• Wolfgang Fischer · Meerbusch, DE

Key dates

• Filing date: Aug 14, 2000
• Grant date: Mar 5, 2002
• Expiry date: Aug 14, 2020

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 preparation of block copolymers from vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl or alkali metal alkoxide and at least one magnesium, aluminum or zinc organyl.