Borealis Ag

Timo Sciarone

Luigi Resconi

Alexander Z Voskoboynikov

Vyatcheslav V Izmer

Dmitry S Kononovich

Anna Fait

Noureddine Ajellal

Rafael Sablong

Oleg Vladimirovich Samsonov

Luigi Maria Cristoforo Resconi

Oleg Samsonov

Catalyst system for producing ethylene copolymers in a high temperature solution process, the catalyst system comprising (i) a metallocene complex of formula (I) 

Catalyst system for producing polyethylene copolymers in a high temperature solution polymerization process

Catalyst system for producing ethylene copolymers in a high temperature solution process, the catalyst system comprising (i) a metallocene complex of formula (I), M is Hf or a mixture with Zr, provided that more than 50% by moles of the complex of Formula I has M=Hf, X is a sigma ligand, R are the same or different from each other and can be saturated linear or branched C-Calkyl, C-Caryl, C-Calkylaryl or C-Carylalkyl groups, which can optionally contain up to 2 heteroatoms or silicon atoms, Ris a C-C-aryl, which can be unsubstituted or substituted by one or up to 5 linear or branched C-Calkyl group(s), Ris a saturated linear or cyclic C-Calkyl group or a branched CRRRgroup, wherein Ris hydrogen or an C-Calkyl group and Rand Rare the same or are different and can be an C-Calkyl group and (ii) a boron containing cocatalyst. 

Catalyst system, the catalyst system comprising (i) at least one metallocene complex of formula (I), (I) wherein Mt1 is Hf, X is a sigma-donor ligand, R, R, Rare the same or different from each other and can be hydrogen or a saturated linear or branched C-Calkyl, whereby the alkyl group can optionally contain up to 2 heteroatoms belonging to groups 14-16 of the periodic table, or Rand Ror Rand Rcan form a ring having 4 to 6 C-atoms and 1 to 3 double bonds, Rand Rare the same or different from each other and can be saturated linear or branched C-Calkyl, C-Caryl, C-Calkylaryl or C-Carylalkyl groups, which can optionally contain up to 2 heteroatoms belonging to groups 14-16 of the periodic table, n can be 1 to 5, Ar is a C-C-aryl or -heteroarylgroup, which can be unsubstituted or substituted by 1 to 5 linear or branched C-Calkyl group(s), and (ii) a boron containing cocatalyst. 

Borate-activated metallocene catalysts

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Eindoven, Netherlands

Timo Sciarone