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:
Jul. 23, 2013
Filed:
Nov. 03, 2011
Julien Thuilliez, Clermont-Ferrand, FR;
Christophe Boisson, Tramoyes, FR;
Roger Spitz, Lyons, FR;
Michelin Recherche et Technique S.A., Puteaux, FR;
Total Petrochemicals France, Paris-Cedex, FR;
Centre National de la Recherche Scientifique Ecole Superieure de Chimie-Physique-Electronique, Villeurbanne Cedex, FR;
Abstract
Borohydride metallocene complex of lanthanide, preparation process, catalytic system incorporating borohydride metallocene complex, process for copolymerization of olefins employing catalytic system. The complex corresponds to one or other of formulae A and B: where, in A, two ligands Cp, Cp, each composed of a cyclopentadienyl group, are connected to the lanthanide Ln, such as Nd, and where, in B, a ligand molecule, composed of two cyclopentadienyl groups Cp, Cpconnected to one another via a bridge P of formula MRR, M is an element from group IVa, and Rand R, which are identical or different, represent an alkyl group comprising from 1 to 20 carbon atoms, is connected to the lanthanide Ln, L is alkali metal, N is molecule of a complexing solvent, x is integral or non-integral number≧0, p is integer≧than 1 and y is integer≧0.