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:
Sep. 18, 2012
Filed:
Nov. 07, 2011
Julien Thuilliez, Clermont-Ferrand, FR;
Christophe Boisson, Tramoyes, FR;
Roger Spitz, Lyons, FR;
Michelin Recherche et Technique S.A., Granges-Paccot, CH;
Total Petrochemicals France, Puteaux, FR;
Centre National de la Recherche Scientifique, Paris, FR;
Ecole Superieure de Chimie-Physique-Electronique de Lyon, Cedex, FR;
Abstract
Borohydride metallocene complex of lanthanide, preparation process, catalytic system incorporating it, copolymerization of olefins employing catalytic system and ethylene/butadiene copolymer, the butadiene units comprise 1,2-cyclohexane or 1,2- and 1,4-cyclohexane links. The complex corresponds to of formulae A and/or B: where, in A two ligands Cpand Cp, each of a fluorenyl group, are connected to the lanthanide Ln, where, in B, a ligand molecule, composed of two fluorenyl groups Cpand Cpare connected via bridge P of formula MRR, is an element from group IVa, Rand R, which are identical or different, represent an alkyl group comprising from 1 to 20 carbon atoms, connected to lanthanide Ln, L is alkali metal, N is molecule of a complexing solvent, x is integral or non-integral number ≧0 and p is integer ≧1.