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:
Jul. 20, 2010
Filed:
Mar. 24, 2004
Richard J Harrison, Godmanchester, GB;
Bruce C Gilbert, Helsington, GB;
Andrew F Parsons, Helsington, GB;
Derek J Irvine, Yarm, GB;
Richard J Harrison, Godmanchester, GB;
Bruce C Gilbert, Helsington, GB;
Andrew F Parsons, Helsington, GB;
Derek J Irvine, Yarm, GB;
Croda International, Inc., Goole, East Yorkshire, GB;
Abstract
Ethylenically unsaturated, particularly acrylic, monomers are polymerized using a catalyst system including a manganese carbonyl initiator, an organic halogen reactive substrate and an allylic halide chain termination agent. Desirably the manganese carbonyl initiator is a dimanganese compound, particularly dimanganese decacarbonyl (Mn(CO)). The catalysis mechanism appears to involve initiator homolysis, abstraction of halogen from the reactive substrate forming an organic free radical which acts as a chain initiator for polymerization and eventual reaction of the propagating chain radical with the chain terminating agent. The speed or extent of reaction may be modified by the inclusion of Lewis acids in the reaction mixture. The resulting polymers are telechelic and may have different end groups. The polymers can be reacted further to functionalize them and/or to form block copolymers.