Patent ID: 6284698
Filing Date: 2001-09-04
Classification: C07F,C08F

Abstract:
A composition comprising:1) one or more bimetallic complexes corresponding to the formula: ##STR37##wherein:M and M' are independently Group 3, 4, 5, 6, or Lanthanide metals;L is a divalent group (or trivalent group if bound to Q) having up to 50 nonhydrogen atoms and containing an aromatic .pi.-system through which the group is bound to M, said L also being bound to Z;L' is a monovalent group or a divalent group (if bound to L"" or Q), or a trivalent group (if bound to both L"" and Q) having up to 50 nonhydrogen atoms and containing an aromatic .pi.-system through which the group is bound to M';L"" is a monovalent group or a divalent group (if bound to L' or Q), or a trivalent group (if bound to both L' and Q) having up to 50 nonhydrogen atoms and containing an aromatic .pi.-system through which the group is bound to M', or L"" is a moiety comprising boron or a member of Group 14 of the Periodic Table of the Elements, and optionally also comprising nitrogen, phosphorus, sulfur or oxygen, said L"" having up to 20 non-hydrogen atoms;Z is a moiety comprising boron or a member of Group 14 of the Periodic Table of the Elements, and also comprising nitrogen, phosphorus, sulfur or oxygen, said Z having up to 20 non-hydrogen atoms;X and X' independently each occurrence are anionic ligand groups having up to 40 atoms exclusive of ligands containing an aromatic or conjugated dienyl .pi.-system through which the group is bound to M and M', respectively, or optionally two X groups or two X' groups together form a divalent, C.sub.4-40 conjugated or nonconjugated dienyl ligand, optionally substituted with one or more hydrocarbyl, silyl, halocarbyl, or halohydrocarbyl groups, that together with M and M', respectively, form a metallocyclopentene moiety; or further optionally, two X groups or two X' groups together form a neutral, C.sub.4-40 conjugated or nonconjugated diene ligand, optionally substituted with one or more hydrocarbyl, silyl, halocarbyl, or halohydrocarbyl groups, that is .pi.-bonded to M and M', respectively;X"" independently each occurrence is a neutral ligating compound having up to 20 atoms, exclusive of neutral dienes;Q is a divalent anionic ligand group bound at one terminus to either Z or L and bound at the remaining terminus to either L' or L"", said Q having up to 20 nonhydrogen atoms; andx, x', and x"" are independently integers from 0 to 3; and2) one or more activating cocatalysts;wherein activating cocatalyst component 2) causes both metal centers, M and M', of the one or more bimetallic metal complexes 1) to be catalytically active for the polymerization of addition polymerizable monomers.