Borohydride metallocene complex of a lanthanide, catalytic system including said complex, polymerization method using same and ethylene/butadiene copolymer obtained using said method

US8492573B2 · kind B2 · utility

Assignees

• MICHELIN RECHERCHE ET TECHNIQUE S.A. · CH
• TOTAL PETROCHEMICALS FRANCE · FR
• Centre National de la Recherche Scientifique Ecole Superieure de Chimie-Physique-Electronique · FR

Inventors

• Julien Thuilliez · Clermont-Ferrand, FR
• Christophe Boisson · Les Balmes, FR
• Roger Spitz · New York, US

Key dates

• Filing date: Nov 3, 2011
• Grant date: Jul 23, 2013
• Expiry date: Nov 3, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/943
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

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 Cp1, Cp2, 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 Cp1, Cp2 connected to one another via a bridge P of formula MR1R2, M is an element from group IVa, and R1 and R2, 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.