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. 08, 2019
Filed:
Jan. 25, 2018
University of Massachusetts, Boston, MA (US);
Infineum International Limited, Abingdon, Oxfordshire, GB;
Rudolf Faust, Lexington, MA (US);
Jacob Emert, Brooklyn, NY (US);
Philip Dimitrov, Linden, MA (US);
Peter Hobin, Abingdon, GB;
Kyle Nesti, Abingdon, GB;
University of Massachusetts, Boston, MA (US);
Infineum International Limited, Abingdon, Oxfordshire, GB;
Abstract
An improved process for the preparation of polybutene having an exo-olefin content of at least 50 mol. % by the polymerization of iso-butene, or a Cfeed containing iso-butene and other Colefins using (i) a Lewis acid.Lewis base catalyst complex and an alkyl halide initiator, in a substantially or completely apolar polymerization medium, in the presence of a hindered alcohol or alkoxyaluminum dichloride. In the above polymerization reaction, it has been found that a hindered alcohol or hindered alkoxyaluminum dichloride will function as an 'exo enhancer' resulting in high isobutene conversion and the production of a polybutene product having a high terminal vinylidene content, while maintaining a target molecular weight.