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:
Sep. 27, 2016
Filed:
Jun. 05, 2012
Applicants:
Sohel K. Shaikh, Dhahran, SA;
Rex Lawson, Pearland, TX (US);
Inventors:
Sohel K. Shaikh, Dhahran, SA;
Rex Lawson, Pearland, TX (US);
Assignee:
TPC GROUP LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F 110/10 (2006.01); C07C 2/20 (2006.01);
U.S. Cl.
CPC ...
C08F 110/10 (2013.01); C07C 2/20 (2013.01); C07C 2527/1213 (2013.01);
Abstract
In one preferred embodiment, the present invention provides a process for the liquid phase polymerization of isobutylene to manufacture highly reactive PIB oligomers having Mn under 1000, using a catalyst composition comprising a Friedel-Crafts catalyst a complexing agent, a chain transfer agent and a polymerization-retarding agent. A chain transfer agent may be selected from: α-DIB and β-DIB and mixtures thereof. A polymerization-retarding agent may be selected from: