Process for the production of polyisoolefins

US5668232A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerhard Langstein · Kürten, DE
• Dieter Freitag · Krefeld, DE
• Michael Lanzendorfer · Pegnitz, DE
• Karin Weiss · Bayreuth, DE

Key dates

• Filing date: Jul 8, 1996
• Grant date: Sep 16, 1997
• Expiry date: Jul 8, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F110/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyisoolefins are obtained using the process according to the invention by polymerising isoolefins, optionally with conjugated or unconjugated dienes and/or cationically polymerisable, mono- or polyunsaturated compounds at temperatures of -100.degree. C. to +100.degree. C. and pressures of 0.1 to 100 bar in solution, in suspension or in the gas phase in the presence of initiator systems consisting of certain hydrocarbons and open-chain and/or cyclic aluminoxane compounds.