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:
Aug. 08, 2000
Filed:
Jun. 01, 1998
Applicant:
Inventors:
Marvin D Rausch, Amherst, MA (US);
Emma J Thomas, Amherst, MA (US);
Serge Bettonville, Crisnee, BE;
Didier Grandfils, Brussels, BE;
Assignee:
Solvay Polyolefins Europe-Belgium (Societe Anonyme), Brussels, BE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ;
U.S. Cl.
CPC ...
556 53 ; 502103 ; 502117 ; 526160 ; 526943 ;
Abstract
Novel asymmetric ethylene-bridged metallocenes useful as catalysts in the polymerization of olefins and process for preparing said metallocenes. The novel metallocenes are represented by the general formula: ##STR1## wherein M represents a transition metal selected from titanium, zirconium and hafnium and X and X' represent a halogen atom. Preferably, the transition metal is Zr and the halogen atoms are both chlorine. Process for producing the novel metallocenes of general formula (I) comprising the steps of: