Method for producing halogen-free reactive polyisobutene

US6441110B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Christoph Sigwart · Schriesheim, DE
• Thomas Narbeshuber · Ludwigshafen, DE
• Karsten Eller · Stockach, DE
• Manfred Barl · Otterstadt, DE
• Rolf Fischer · Heidelberg, DE
• Eugen Gehrer · Stockach, DE

Key dates

• Filing date: Aug 6, 1999
• Grant date: Aug 27, 2002
• Expiry date: Aug 6, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing halogen-free, reactive polyisobutene having a terminal double bond content of more than 50 mol % and an average molecular weight Mn of 280-10000 dalton by the cationic polymerization in the liquid phase of isobutene or hydrocarbon mixtures comprising isobutene comprises polymerizing at from −30° C. to +40° C. in the presence of a heterogeneous polymerisation catalyst comprising one or more oxides of the elements of transition groups V and VI of the Periodic Table of the Elements or in the presence of a heterogeneous polymerization catalyst comprising one or more oxidic compounds of one or more elements of transition groups V and VI of the Periodic Table of the Elements supported on a non-zeolitic oxidic support material which is not an oxygen-containing zirconium compound, the catalyst not containing a technically effective amount of halogen.