The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2002
Filed:
Sep. 10, 1997
Mario Sacchetti, Ferrara, IT;
Stefano Pasquali, Fossanova San Marco, IT;
Gabriele Govoni, Renazzo, IT;
Basell Technology Company bv, Hoofddorp, NL;
Abstract
The present invention relates to components of catalysts for the polymerization of olefins comprising a metallocene compound and a magnesium halide which have particular values of porosity and surface area. Group 4 and vanadium metallocenes are useful metallocenes and the components typically include an electron donor such as an ether, ester or ketone. In particular the components of the invention have surface area (BET) greater than about 50 m /g, porosity (BET) greater than about 0.15 cm /g and porosity (Hg) greater than 0.3 cm /g, with the proviso that when the surface area is less than about 150 m g, the porosity (Hg) is less than about 1.5 cm /g. The magnesium halide is complexed by an ether, ester, or ketone electro donor. The components of the invention are particularly suitable for the preparation of catalysts for the gas-phase polymerization of &agr;-olefins.