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AssigneeBP Chemicals Limited
InventorsGrant Jacobsen, Brian Kimberley, Sergio Mastroianni, Michael Taylor
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A method for the preparation of a supported transition metal catalyst system which includes the steps of: (i) mixing together in a suitable solvent (a) an aluminoxane and (b) an ionic activator containing a cation and an anion, wherein the anion has at least one substituent containing a moiety having an active hydrogen, (ii) addition of the mixture from step (i) to a support material, and (iii) addition of a transition metal compound in a suitable solvent. The use of tetraisobutylaluminoxane as the aluminoxane results in a more stable activity profile and improved polymer properties in particular melt strength.
A method for the preparation of a supported transition metal catalyst system, the method comprising the steps of:
A process for the polymerisation of olefin monomers, comprising polymerising an olefin monomer selected from the group consisting of (a) ethylene, (b) propylene (c) mixtures of ethylene and propylene and (d) mixtures of (a), (b) or (c) with one or more other alpha-olefins under polymerisation conditions and in the presence of a supported transition metal catalyst system prepared by:
A process for the (co-)polymerization of ethylene, comprising polymerising ethylene or copolymerising ethylene and α-olefins having from 3 to 10 carbon atoms, under polymerisation conditions and in the presence of a supported catalyst system prepared by:
A catalyst component comprising the reaction product of
Dependencies are inferred from the claim text.