Polimeri Europa S.p.a.

Vincenzo Passarelli

Francesco Masi

Anna Sommazzi

Giampietro Borsotti

Roberto Santi

Guido Pampaloni

Fausto Calderazzo

An organometallic composition which can be used as activating component in a metallocene catalyst for the (co)polymerization of &#x3b1;-olefins, comprises: (A) a fluorinated di-unsaturated cyclic compound, having a relatively acid hydrogen atom, (B) an organometallic compound sufficiently basic to react with the acid hydrogen of the above compound (A), and (C) a polar aprotic organic compound, not containing metallic atoms, having a dielectric constant, in the pure state, equal to or greater than 2, and a weak coordinating capacity. Said composition allows a metallocene catalytic system of the ionic type to be obtained, with a high activity in the (co)polymerization of olefins and a reduced content of metallic residue in the polymeric product thus obtained.

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Pisa, Italy

Vincenzo Passarelli