Patent ID: 8536081

Claim:
A supported catalyst system for the polymerisation of olefins, said catalyst system comprising: (a) at least two different monocyclopentadienyl transition metal compounds, having the formula (i) (Cp)mM(PI)nLq wherein Cp is a ligand from the group consisting of cyclopentadienyl, substituted cyclopentadienyl, indenyl, substituted indenyl, fluorenyl and substituted fluorenyl, M is a Group 4 metal selected from hafnium, titanium or zirconium, PI is a phosphinimine ligand, L is an activatable ligand, m is 1 and n is 1 or 2, q is 1 or 2, and m+n+q equals the valence of said metal or (ii) wherein:— R′ each occurrence is independently selected from the group consisting of hydrogen, hydrocarbyl, silyl, germyl, halo, cyano, and combinations thereof, said R′ having up to 20 nonhydrogen atoms, and optionally, two R′ groups (where R′ is not hydrogen, halo or cyano) together form a divalent derivative thereof connected to adjacent positions of the cyclopentadienyl ring to form a fused ring structure; X is a neutral η 4 bonded diene group having up to 30 non-hydrogen atoms, which forms a π-complex with M; Y is —O—, —S—, —NR*—, —PR*—, M is titanium or zirconium in the +2 formal oxidation state; Z* is SiR* 2 , CR* 2 , SiR* 2 SiR* 2 , CR* 2 CR* 2 , CR*═CR*, CR* 2 SiR* 2 , or GeR* 2 , wherein: R* each occurrence is independently hydrogen, or a member selected from the group consisting of hydrocarbyl, silyl, halogenated alkyl, halogenated aryl, and combinations thereof, said R* having up to 10 non-hydrogen atoms, and optionally, two R* groups from Z* (when R* is not hydrogen), or an R* group from Z* and an R* group from Y form a ring system, (b) one or more activators comprising an ionic compound comprising (i) a cation and (ii) an anion having up to 100 non-hydrogen atoms and the anion containing at least one substituent comprising a moiety having an active hydrogen, and (c) one or more support materials.