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:
May. 10, 2016
Filed:
Nov. 18, 2010
Francesco Masi, Sant'Angelo Lodigiano, IT;
Mario Polesello, Ferrara, IT;
Roberto Fusco, Novara, IT;
Anna Sommazzi, Novara, IT;
Antonio Alfonso Proto, Novara, IT;
Laura Meda, Galliate, IT;
Tiziano Pennati, Curtatone, IT;
Elena Maria Frigerio, Curtatone, IT;
Alessandro Pennati, Curtatone, IT;
Giuseppe Conti, Padenghe Sul Garda, IT;
Francesco Menconi, Massa Macinaia, IT;
Francesco Masi, Sant'Angelo Lodigiano, IT;
Mario Polesello, Ferrara, IT;
Roberto Fusco, Novara, IT;
Anna Sommazzi, Novara, IT;
Antonio Alfonso Proto, Novara, IT;
Laura Meda, Galliate, IT;
Tiziano Pennati, Curtatone, IT;
Giuseppe Conti, Padenghe Sul Garda, IT;
Francesco Menconi, Massa Macinaia, IT;
Versalis S.p.A., San Donato Milanese, IT;
Abstract
Solid catalyst with a high thermal stability for the (co)polymerization of α-olefins, comprising titanium, magnesium, at least one metal selected from hafnium and zirconium, aluminum and chlorine, wherein at least 60% of the titanium is in oxidation state +3, and, when examined by means of XPS spectroscopy, has an absorption band characteristic of a binding energy ranging from 455 to 458 eV. Said catalyst, used in combination with a suitable co-catalyst in (co)polymerization processes of α-olefins at a high temperature, shows an improved productivity, a high incorporation of co-monomers in the copolymerization of ethylene and an increased thermal stability with respect to the systems so far in use.