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

US8071700B2 · kind B2 · utility

Assignees

• MICHELIN RECHERCHE ET TECHNIQUE S.A. · CH
• TOTAL PETROCHEMICALS FRANCE · FR
• CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE · FR
• ECOLE SUPERIEURE DE CHIMIE PHYSIQUE ELECTRONIQUE DE LYON · FR

Inventors

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

Key dates

• Filing date: Oct 31, 2006
• Grant date: Dec 6, 2011
• Expiry date: Jun 1, 2027

Classification

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

Abstract

A borohydride metallocene complex of a lanthanide, its process of preparation, a catalytic system incorporating a borohydride metallocene complex and a process for the copolymerization of olefins employing this catalytic system. Such a complex corresponds to one or other of the following formulae A and B:where, in the formula A, two ligands Cp1 and Cp2, each composed of a cyclopentadienyl group, are connected to the lanthanide Ln, such as Nd, and where, in the formula B, a ligand molecule, composed of two cyclopentadienyl groups Cp1 and Cp2 which are connected to one another via a bridge P of formula MR1R2, where M is an element from group IVa, such as Si, and where 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, where L represents an alkali metal, such as Li, where N represents a molecule of a complexing solvent, such as THF, where x is an integral or non-integral number greater than 0, where p is an integer equal to or greater than 1 and where y is an integer which is equal to or greater than 0.