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:
Mar. 01, 2016
Filed:
Jan. 17, 2011
Adam Gronowski, Sarnia, CA;
Carsten Kreuder, Sarnia, CA;
John Lovegrove, Sarnia, CA;
Paul Nguyen, London, CA;
David Thompson, London, CA;
Hanns-ingolf Paul, Leverkusen, DE;
Rolf Feller, Mettmann, DE;
Udo Weisner, Bornheim, DE;
Adam Gronowski, Sarnia, CA;
Carsten Kreuder, Sarnia, CA;
John Lovegrove, Sarnia, CA;
Paul Nguyen, London, CA;
David Thompson, London, CA;
Hanns-Ingolf Paul, Leverkusen, DE;
Rolf Feller, Mettmann, DE;
Udo Weisner, Bornheim, DE;
LANXESS INTERNATIONAL SA, Granges-Paccot, CH;
Abstract
The invention relates to an energy efficient, environmentally favorable process for the preparation of brominated rubbers, in particular bromobutyl rubber, that uses a common medium for both solution polymerization and subsequent bromination of the rubber and which further exhibits an enhanced bromine usage due to the use of a oxidizing agent. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and bromination of rubber in the presence of a brominating agent and an oxidizing agent with intermediate removal of un-reacted monomers.