Catalyst based on rare earth metal compounds

US6492476B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Thomas Knauf · Dormagen, DE
• Wilfried Braubach · Solingen, DE

Key dates

• Filing date: Oct 26, 2000
• Grant date: Dec 10, 2002
• Expiry date: Oct 26, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/58
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention comprises a catalyst based on rare earth metal compounds which consists of a rare earth metal compound, an organic aluminum compound and a trihalosilane, of a process for the production thereof and of the use of the catalyst for polymerizing conjugated dienes to form high molecular weight polybutadienes.