Polimeri Europa S.p.a.

Eni S.p.a.

Maria Rivellini, Legal Representative

Laura Santi, Legal Representative

Stefano Santi, Legal Representative

Francesco Masi

Anna Sommazzi

Antonio Alfonso Proto

Andrea Vallieri

Paolo Biagini

Giovanni Ricci

Marco Ricci

Stefano Ramello

Mario Polesello

Stefanio Bonsignore

Roberto Provera

Sefano Santi, Legal Representative

Gian Paolo Ravanetti

Marco Battistella

Promoters are described for vanadium-based catalysts used in the (co)polymerization of olefins and, in particular, in the production of ethylene/propylene (EPR) or ethylene/propylene/diene (EPDM) elastomeric copolymers. The promoters of the present invention belong to the group of compounds having general formula I: wherein:

Chlorinated promoters for vanadium-based polymerization catalysts

The present invention relates to a supported catalyst containing titanium, its preparation and it use in the homo-, co-, and ter-polymerization of olefin-unsaturated compounds. The present invention also relates to a catalytic system comprising a supported catalyst based on titanium and a co-catalyst selected from organo-derivatives of aluminum. More specifically, the present invention relates to catalyst supported on silica, obtained by reacting a titanium halocarboxylate and a magnesium halocarboxylate with an aluminum chloroakylderivative, in the presence of a carrier consisting of high porosity silica. The above reaction essentially takes place in the pores of the silica itself.

Supported catalyst containing active titanium in the homo, co-, and ter-polymerization of olefin-unsaturated compounds

A process is described for the preparation of ethylene copolymers having a wide molecular weight distribution, characterized in that it is carried out in the presence of meso- and rac-stereoisomeric mixtures of metallocene compounds having general formula (I), wherein A' and A&#x2033;, the same or different, are a radical of the &#x3b7;?5-tetrahydroindenyl type (Ia) 

Process for the preparation of ethylene copolymers

A description follows of random butadiene-isoprene copolymers with a trans-1,4 structure, having a butadiene/isoprene molar composition ranging from 98/2 to 32/68, the above copolymers being crystalline or amorphous depending on the isoprene content. The process for the preparation of the above copolymers is also described, in the present of a catalytic system which comprises: (a) a first component consisting of a vanadium compound selected from: (a1) compounds having general formula (Ia) VO(L)(X)wherein n is an integer from 1 to 3 and m ranges from zero to 2, n+m being equal to 2 or 3; (a2) compounds having general formula (Ib) V(L)(X)wherein p is an integer from 1 to 4, q ranges from zero to 3, the sum of p+q being equal to 3 or 4; wherein L is a bidentate ligand and X is a halogen, preferably Chlorine; (b) a second component selected from aluminoxanes and relative derivatives.

Random butadiene-isoprene copolymers with a trans-1, 4 structure

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Novara, Italy

Maria Rivellini, Legal Representative