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:
Feb. 03, 2009
Filed:
Sep. 18, 2003
Hans Peter Rath, Gruenstadt, DE;
Stephan Hueffer, Ludwigshafen, DE;
Gabriele Lang, Mannheim, DE;
Arno Lange, Bad Duerkheim, DE;
Eckard Schauss, Heuchelheim, DE;
Hans Peter Rath, Gruenstadt, DE;
Stephan Hueffer, Ludwigshafen, DE;
Gabriele Lang, Mannheim, DE;
Arno Lange, Bad Duerkheim, DE;
Eckard Schauss, Heuchelheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for the preparation of polyisobutene containing at least 75 mol % of terminal vinylidene groups, in which isobutene or an isobutene-containing hydrocarbon mixture is polymerized in the liquid phase in the presence of a boron trifluoride complex catalyst having the compositiona(BF):b(Co1):c(Co2)where Co1 is at least one tertiary alcohol, Co2 is at least one compound selected from water, primary alcohols, secondary alcohols, dialkyl ethers, alkanecarboxylic acids and phenols, the ratio c:b is from 0.9 to 1.8 and the ratio (b+c):a is from 0.9 to 3.0, is described.