Patent ID: 7060770
Filing Date: 2006-06-13
Classification: C08G

Abstract:
1. A composition capable of undergoing a metathesis reaction upon mixing its components, the components comprising: an olefin-containing substrate comprising at least one oligomer or polymer having a backbone of >50% linear siloxane units, the oligomer or polymer functionalized with olefin groups capable of undergoing a metathesis reaction, wherein the at least one oligomer or polymer is selected from the group consisting of: a telechelic oligomer or polymer end-capped with the olefin groups, an oligomer or polymer tethered and end-capped with the olefin groups, a tri-functional oligomer or polymer end-capped with the olefin groups, and a quadri-functional oligomer or polymer end-capped with the olefin groups, and combinations thereof; and a metal carbene complex catalyst capable of initiating the metathesis reaction in the composition, wherein the catalyst has the structure: wherein: M is ruthenium or osmium, X is an alkylidene ligand with basicity higher than that of tricyclohexylphosphine (PCy X1 is a neutral electron donor ligand with a basicity lower than that of tricyclohexylphosphine, X R a reaction control agent for slowing the progress of the metathesis reaction after mixing the composition components and having the structure: wherein: G is selected from the group consisting of: L L is a hydrocarbon fragment containing a double or triple bond, L A is a Group 14 atom, n=0–20, and m=0–20.