Patent ID: 6107420
Filing Date: 2000-08-22
Classification: C08G,Y10S

Abstract:
A method for controlling the initiation of metathesis polymerization comprising:contacting a metathesis catalyst with an olefin in a reaction mixture at a first temperature andheating the reaction mixture to a second temperaturewherein the metathesis catalyst is of the formula: ##STR7## wherein: M is ruthenium or osmium;X and X.sup.1 are each independently any anionic ligand;L and L.sup.1 are each independently any neutral electron donor ligand; and,R and R.sup.1 are each independently hydrogen or substituent selected from the group consisting of C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.20 alkenyl, C.sub.2 -C.sub.20 alkynyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.1 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, C.sub.2 -C.sub.20 alkynyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbonyl, C.sub.1 -C.sub.20 alkylthio, C.sub.1 -C.sub.20 alkylsulfonyl and C.sub.1 -C.sub.20 alkylsulfinyl, the substituent optionally substituted with one or moieties selected from the group consisting of C.sub.1 -C.sub.10 alkyl, C.sub.1 -C.sub.10 alkoxy, and aryl.