Patent ID: 6825295
Filing Date: 2004-11-30
Classification: C07C,C07F,C08F

Abstract:
A process for polymerizing ethylene, optionally at least one diene, and further optionally a C3-12 &agr;-olefin by contactina a mixture thereof with a metal complex and an activating cocatalyst under addition polymerization conditions and covering the resulting polymer product, characterized in that the metal complex is a metal complex corresponding to the formula: where M is a Group 4 metal that is in the +2, +3 or +4 formal oxidation state; RA independently each occurrence is hydrogen, or a hydrocarbyl, balohydrocarbyl, hydrocarbyloxyhydrocarbyl, dihydrocarbylaminohydrocarbyl, dihydrocarbylamino, hydrocarbyloxy, hydrocarbylsilyl, or trihydrocarbylsilyihydrocarbyl group of from 1 to 80 atoms, not counting hydrogen, or optionally, two or more RA groups may be covalently linked together; and is a 2-alkyl-4-arylinden-1-yl group of up to 30 total carbon toms; Z is (RD)2Si&boxH;, wherein RD independently each occurrence is C1-10 alkyl substituted phenyl or two RD groups together are alkyl- or polyalkyl-substituted arylene of up to 40 carbons; and Y is bonded to M and Z and is selected from the group consisting of â€”Oâ€”, â€”Sâ€”, â€”NREâ€”, and â€”PREâ€”; wherein, RE independently each occurrence is hydrogen, or a member selected from hydrocarbyl, hydrocarbyloxy, silyl, halogenated alkyl, halogenated aryl, and combinations thereof, said RE having up to 20 nonhydrogen atoms X is an anionic or dianionic ligand group having up to 60 atoms exclusive of the class of ligands that are cyclic, delocalized, &pgr;-bound ligand groups; Xâ€² independently each occurrence is a neutral ligand having up to 40 atoms p is zero or 2, and is two less than the formal oxidation state of M when X is an anionic ligand, and when X is a dianionic ligand group, p is 1; and q is zero, 1 or 2.