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:
Dec. 25, 2012
Filed:
Jul. 20, 2011
Ezat Khosravi, Durham, GB;
Alan M. Kenwright, Durham, GB;
Zhanru Yu, Oxford, GB;
David M. Haigh, Oxfordshire, GB;
Lois Hobson, Teesside, GB;
Ezat Khosravi, Durham, GB;
Alan M. Kenwright, Durham, GB;
Zhanru Yu, Oxford, GB;
David M. Haigh, Oxfordshire, GB;
Lois Hobson, Teesside, GB;
Henkel AG & Co. KGaA, Duesseldorf, DE;
Abstract
A ring-opening metathesis polymerization (ROMP) reaction is disclosed in which a cyclic alkene compound is subjected to ROMP using a ruthenium ROMP catalyst having heterocyclic ligands in the presence of a compound from which such ligands may be derived. The process includes the step of adding sufficient of an acyclic alkene having a carbon-carbon double bond capable of reacting with the catalytic metal moieties attached to the living end of each of the polymer chains generated in the ROMP reaction to end cap the polymer chains and to generate a olefin metathesis catalyst. The process includes reiterating the polymerization steps by adding further amounts of a cyclic alkene compound. The catalyst may be generated in situ from a precursor compound by the addition of a compound from which heterocyclic ligands may be derived by interaction with the precursor compound.