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. 13, 2021
Filed:
Feb. 13, 2017
Basf SE, Ludwigshafen am Rhein, DE;
Rosa Corberan Roc, Ludwigshafen, DE;
Klaus Muehlbach, Ludwigshafen, DE;
Thomas Wettling, Ludwigshafen, DE;
Sergei V. Kostjuk, Minsk, BY;
Irina Vasilenko, Minsk, BY;
Dmitryi Shiman, Minsk, BY;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for preparing high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 70 mol %, which comprises polymerizing isobutene or an isobutene-comprising monomer mixture in the presence of an aluminum trihalide-donor complex effective as a polymerization catalyst or an alkylaluminum halide-donor complex effective as a polymerization catalyst, wherein the aluminum trihalide or alkylaluminum halide is treated with at least one inorganic hydrate.