Copolymerization of conjugated dienes with non-conjugated olefins by means of rare earth catalysts

US6706830B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Heike Windisch · Leverkusen, DE
• Gerd Sylvester · Leverkusen, DE
• Rudolf Taube · Freising, DE
• Steffen Maiwald · Merseburg, DE
• Jurgen Giesemann · Bodenwerder, DE
• Thomas Rosenstock · Munich, DE

Key dates

• Filing date: Apr 21, 2003
• Grant date: Mar 16, 2004
• Expiry date: Apr 21, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F236/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the copolymerization of conjugated diolefins with non-conjugated olefins in the presence of rare earth metal catalysts. The advantages of the process according to the invention are in particular the high selectivity, good space-time yield and the possibility of being able to vary the reaction conditions within a wide range.