Supported olefin polymerization catalyst

A supported catalyst system for the polymerisation of olefins comprising

• (a) a metallocene represented by the general formula:
• wherein:
• R′ each occurrence is independently selected from 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 η4 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*2SiR*2, CR*2CR*2, CR*═CR*, CR*2SiR*2, or GeR*2, wherein:
• R* each occurrence is independently hydrogen, or a member selected from 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) a cocatalyst comprising an organometallic compound, and
• (c) a support material comprising an inorganic metal oxide, inorganic metal halide or polymeric material or mixtures thereof,
• wherein the support material has been pretreated with a transition metal salt selected from the group consisting of ferrous sulphate, cupric sulphate and ferrous D-gluconate before the support material is contacted with (a) and with (b).

A supported catalyst system suitable for the polymerisation of olefins comprising

• (a) a metallocene represented by the general formula:
• wherein:
• R′ each occurrence is independently selected from 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 η4 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*2SiR*2, CR*2CR*2, CR*═CR*, CR*2SiR*2, or GeR*2, wherein:
• R* each occurrence is independently hydrogen, or a member selected from 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) an activator comprising a fluorine containing Group IIIA metal or metalloid compound, and
• (c) a support material comprising an inorganic metal oxide, inorganic metal halide or polymeric material or mixtures thereof,
• wherein the support material has been pretreated with a source of a transition metal atom before the support material is contacted with (a) and with (b).

A supported catalyst system suitable for the polymerisation of olefins comprising

• (a) a metallocene represented by the general formula:
• wherein:
• R′ each occurrence is independently selected from 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 η4 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*2SiR*2, CR*2CR*2, CR*═CR*, CR*2SiR*2, or GeR*2, wherein:
• R* each occurrence is independently hydrogen, or a member selected from 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) an activator comprising a boron compound, and
• (c) a support material comprising an inorganic metal oxide, inorganic metal halide or polymeric material or mixtures thereof,
• wherein the support material has been pretreated with a source of a transition metal atom before the support material is contacted with (a) and with (b).