Process for production of high-isoprene butyl rubber

US7256244B2 · kind B2 · utility

Assignee

• LANXESS Corporation · CA

Inventors

• R. Resendes · Sarnia, CA
• William E. App · Alvinston, CA
• Gerhard Langstein · Kürten, DE
• Martin Bohnenpoll · Cologne, DE
• Gabor Kaszas · London, CA
• Stephan Glander · Wettswil, CH
• Rudolf Casper · Leverkusen, DE

Key dates

• Filing date: Dec 3, 2003
• Grant date: Aug 14, 2007
• Expiry date: Aug 20, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F210/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for producing polymers comprising repeating units derived from at least one isoolefin monomer, at least one multiolefin monomer and optionally further copolymerization monomers in the presence of at least one organic nitro compound and AlCl3/water wherein the process is conducted in the absence of compounds selected from the group consisting of vanadium compounds, zirconium halogenid, and hafnium hallogenides.