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

US8268949B2 · 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: Nov 7, 2011
• Grant date: Sep 18, 2012
• Expiry date: Nov 7, 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 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 Cp1 and Cp2, each of a fluorenyl group, are connected to the lanthanide Ln, where, in B, a ligand molecule, composed of two fluorenyl groups Cp1 and Cp2 are connected via bridge P of formula MR1R2, is an element from group IVa, R1 and R2, 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.