Abstract: Catalytic compositions comprising permethylpentalene based metallocene complexes supported on solid methylaluminoxane are disclosed. The compositions are effective catalysts/initiators in the polymerisation of olefins. Also disclosed are uses of the compositions in olefin polymerisation.

Abstract: Bimetallic catalytic compounds and compositions comprising permethylpentalene ligands, as well as their methods of preparation, are described. The catalytic compounds and compositions are promising catalysts in olefin (e.g. ethylene) polymerisation reactions.

Abstract: The present invention provides a process for the preparation of a multimodal polyethylene, said multimodal polyethylene preferably having a bimodal or trimodal M.W. distribution, comprising: (i) polymerizing ethylene and optionally an ?-olefin comonomer in a first polymerization stage to produce a first ethylene polymer; and (ii) polymerizing ethylene and optionally an ?-olefin comonomer, in the presence of said first ethylene polymer, in a second polymerization stage, wherein said first and second polymerization stages are carried out in the presence of an unsupported metallocene catalyst, which is a complex of a group 4-10 metal having at least two ligands, wherein at least one of the ligands is persubstituted and comprises a delocalized pi system of electrons, each polymerization stage produces at least 5% wt of said multimodal polyethylene, and said multimodal polyethylene has a multimodal M.W. distribution, a M.W. of at least 50,000 g/mol and a bulk density of at least 250 g/dm3.

Abstract: Catalytic compositions comprising permethylpentalene based metallocene complexes supported on solid methylaluminoxane are disclosed. The compositions are effective catalysts/initiators in the polymerisation of olefins. Also disclosed are uses of the compositions in olefin polymerisation.

Abstract: Permethylpentalene based metallocene complexes are disclosed. The complexes are effective catalysts/initiators in the polymerisation of olefins. Also disclosed are compositions comprising the metallocene complexes, as well as uses of the complexes and compositions in olefin polymerisation.

Abstract: The present invention relates to a compound having the formula LaM(OR1)bR2cXd wherein M is a metal selected from Ti, Zr and Hf; L is a ligand selected from permethylpentalene, (hydro)permethyl-pentalene, (hydro)pentalene, cyclopentadiene, indene and ethylene- or silane-bridged indene, preferably (bis)indene; R1 is a 1-6C alkyl, substituted or unsubstituted phenyl, or a substituted or unsubstituted phenylalkylene group; R2 is Me or Et; X is halogen; a=1 to 3, b=1 to 3, c=0 or 1 and d=0, 1, 2 or 3; and dimers thereof, the use of the compound as an initiator in the polymerization of lactide monomer and a process for producing a polylactide performed by contacting a lactide monomer with the compound.

Abstract: The present invention relates to a process for the oligomerisation of ethylene which comprises contacting ethylene with a transition metal-permethylpentalene complex, and a transition metal compound utilized therein.

Abstract: The present invention relates to a synergistic dual olefin copolymerization catalyst system comprising a solid support material having, on its surface, two or more catalytic metal complexes wherein the two or more catalytic metal complexes comprise at least one first transition metal complex and a second transition metal complex different from the first transition metal complex; use of such a system as a catalyst; a process for producing a polymer of an olefin utilizing the catalyst system.

Abstract: The present invention relates to a process for the oligomerisation of ethylene which comprises contacting ethylene with a transition metal-permethylpentalene complex, and a transition metal compound utilized therein.

Abstract: The present invention relates to a synergistic dual olefin copolymerization catalyst system comprising a solid support material having, on its surface, two or more catalytic metal complexes wherein the two or more catalytic metal complexes comprise at least one first transition metal complex and a second transition metal complex different from the first transition metal complex; use of such a system as a catalyst; a process for producing a polymer of an olefin utilizing the catalyst system.

Abstract: The present invention relates to a compound having the formula LaM(OR1)bR2cXd wherein M is a metal selected from Ti, Zr and Hf; L is a ligand selected from permethylpentalene, (hydro)permethyl-pentalene, (hydro)pentalene, cyclopentadiene, indene and ethylene- or silane-bridged indene, preferably (bis)indene; R1 is a 1-6C alkyl, substituted or unsubstituted phenyl, or a substituted or unsubstituted phenylalkylene group; R2 is Me or Et; X is halogen; a=1 to 3, b=1 to 3, c=0 or 1 and d=0, 1, 2 or 3; and dimers thereof, the use of the compound as an initiator in the polymerisation of lactide monomer and a process for producing a polylactide performed by contacting a lactide monomer with the compound.