The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2005
Filed:
Jul. 13, 2001
Thomas Wettling, Limburgerhof, DE;
Dirk Borchers, Kapellen, DE;
Wim Verrelst, Edegem, DE;
Hans Peter Rath, Gruenstadt, DE;
Thomas Wettling, Limburgerhof, DE;
Dirk Borchers, Kapellen, DE;
Wim Verrelst, Edegem, DE;
Hans Peter Rath, Gruenstadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Polyisobutenes are prepared by cationic polymerization of isobutene or isobutene-containing hydrocarbon streams in the liquid phase in the presence of boron trifluoride as a catalyst, the catalytic activity of the boron trifluoride being partially or completely eliminated at a desired time by means of a solid deactivator, by a process in which the solid deactivator has boron trifluoride-binding primary, secondary, tertiary and/or quaternary nitrogen atoms and is insoluble in the reaction mixture.