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:
Apr. 15, 2014
Filed:
Aug. 07, 2012
Hannah Maria Koenig, Mannheim, DE;
Klaus Muehlbach, Gruenstadt, DE;
Thomas Wettling, Limburgerhof, DE;
Ulrich Eichenauer, Boehl-Iggelheim, DE;
Herbert Mayr, Starnberg, DE;
Hannah Maria Koenig, Mannheim, DE;
Klaus Muehlbach, Gruenstadt, DE;
Thomas Wettling, Limburgerhof, DE;
Ulrich Eichenauer, Boehl-Iggelheim, DE;
Herbert Mayr, Starnberg, DE;
BASF SE, Ludwigshafen, DE;
Abstract
Preparation of high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 50 mol % by polymerization of isobutene or isobutene-comprising monomer mixtures in the presence of Lewis acids suitable as polymerization catalysts or of complexes which are effective as polymerization catalysts and are formed from Lewis acids and donors, and in the presence of initiators, wherein the initiators used are organic sulfonic acids Z—SOH in which the variable Z denotes an alkyl radical, haloalkyl radical, cycloalkyl radical, aryl radical or arylalkyl radical.