Patent ID: 6538085
Filing Date: 2003-03-25
Classification: C08F

Abstract:
A process for preparing a polymer composition comprising repeat units of the formula:[A]Sâ€” and â€”[B]T which comprises contacting norbornene or a subsituted norbornene of formula I with one or more functional norbornene monomers selected from wherein,R7a-b is independently selected from H, hydrocarbyl, subsituted hydrocarbyl, fluoroalkyl, R8a-b is independently selected from H, hydrocarbyl, substituted hydrocarbyl, fluoroalkyl, C(O)â€”R9 where R9 is hydrocarbyl or substituted hydrocarbyl; R5a-b and R6a-z are each independently selected from H, hydrocarbyl, halogen, halohydrocarbyl, R5a-b and R6a-b may be taken together to form a ring, and S and T represent the mole fraction of the respective monomer unit and sum to one with the proviso that T>0, in the presence of a transition metal complex of formula II: wherein:M is nickel; D1, D23, and G collectively comprise therefor a monoanionic bidentate ligand; D1 and D2 are monodentate donors linked by a bridging group G, wherein at least one of D1 and D2 is ligated to the metal M by a nitrogen atom substituted by a 1-pyrrolyl or a substituted 1-pyrrolyl group; T is H, hydrocarbyl, substituted hydrocarbyl, or other group capable of inserting an olefin; and L is an olefin or a neutral donor group capable of being displaced by an olefin; in addition, T and L may be taken together to form a &pgr;-allyl or &pgr;-benzyl group or other bidentate group.