Process for producing highly branched polyisoolefins

US6156859A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerhard Langstein · Kürten, DE
• Werner Obrecht · Moers, DE
• Judit E. Puskas · Akron, US
• Oskar Nuyken · Munich, DE
• Karin Weiss · Bayreuth, DE

Key dates

• Filing date: Jul 7, 1997
• Grant date: Dec 5, 2000
• Expiry date: Jul 7, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F236/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Highly branched polyisoolefines are produced according to the invention by the polymerization of isoolefines in a single-stage process, in solution, suspension or in the gas phase in the presence of bifunctional monomers which contain at least one group capable of cationic polymerization and at least one group which serves as an initiator for the cationic polymerization of isoolefines (inimer), at temperatures from +20 to -100.degree. C., optionally in the presence of inert, organic solvents, and in the presence of alkylalumoxanes (coinitiator).