Polimeri Europa S.r.l.

Alberto Zanellato

Francesco Menconi

Giuseppe Conti

Angelo Moalli

Bimetal catalyst for the (co)polymerization of &agr;-olefins comprising a co-catalyst consisting of a hydride or an organometallic compound of an element of groups 1, 2 or 13 of the periodic table, and a solid component consisting of at least 95% by weight of titanium, magnesium, hafnium, aluminum, chlorine and R&mdash;COO carboxylate groups, wherein R is an aliphatic, cycloaliphatic or aromatic hydrocarbon, containing from 1 to 30 carbon atoms, wherein at least 80% of the titanium is in oxidation state &plus;3, and at least 1% of said titanium in oxidation state &plus;3 has a tetrahedral coordination geometry. Said catalyst allows the production of olefinic polymers, particular polyethylene, with a high molecular weight by means of solution polymerization processes at temperatures exceeding 200&deg; C.

Growing community of inventors

San Giuliano Milanese-Milan, Italy

Alberto Zanellato