Borealis Ag

Wilfried Toeltsch

Luigi Resconi

Alexander Z Voskoboynikov

Vyatcheslav V Izmer

Dmitry S Kononovich

Kalle Kallio

Noureddine Ajellal

Ville Virkkunen

Alexander Reznichenko

Simon Schwarzenberger

Ismo Lehtiniemi

Luigi Maria Cristoforo Resconi

Soile Lustig

Dimitry S Kononovich

A specific class of metallocene complexes in combination with a boron containing cocatalyst and an aluminoxane cocatalyst, its use for producing propylene homopolymers, propylene copolymers, especially with ethylene, as well as heterophasic propylene copolymers, preferably in a multistep process including a gas phase polymerization step.

Catalyst system

Claimed are metallocene-complexes of formula (I) [formula (I')] wherein M is Hf or Zr, L is a bridge comprising 1-2 C- or Si-atoms, The other variables are as defined in the claims.

Catalysts

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Linz, Austria

Wilfried Toeltsch