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:
Oct. 26, 1999
Filed:
Mar. 26, 1998
Applicant:
Inventors:
Derek Alan Colman, Fleet, GB;
James Maxwell Kerr, Edinburgh, GB;
Assignee:
BP Chemicals Limited, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
585525 ; 585510 ; 526 86 ; 526209 ; 526210 ; 526237 ;
Abstract
A process for controlling the molecular weight distribution of polyisobutene formed during a liquid phase polymersiation reaction using a catalyst comprising boron trifluoride and taking place in a reactor having condensers associated with it which process involves introducing an electron donor above the level of liquid in the reactor to minimize the reaction of isobutene with free gaseous boron trifluoride in the condensers thereby minimizing the formation of unwanted polymers.