Catalytic system for obtaining conjugated diene/monoolefin...

Details Catalytic system for obtaining conjugated diene/monoolefin... Catalytic system for obtaining conjugated diene/monoolefin...

2006-02-10

2009-06-16

Lu, Caixia (Department: 1796)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

C502S103000, C502S157000, C526S160000, C526S164000

Reexamination Certificate

active

07547654

ABSTRACT:
A catalytic system usable for the copolymerization of at least one conjugated diene and at least one monoolefin, a process for preparing this catalytic system, a process for preparing a copolymer of a conjugated diene and at least one monoolefin using said catalytic system, and said copolymer are described. This catalytic system includes:(i) an organometallic complex represented by the following formula:in-line-formulae description="In-line Formulae" end="lead"?{[P(Cp)(Fl)Ln(X)(Lx)}p  (1)in-line-formulae description="In-line Formulae" end="tail"?where Ln represents a lanthanide atom to which is attached a ligand molecule comprising cyclopentadienyl Cp and fluorenyl Fl groups linked to one another by a bridge P of the formula MR1R2, M is an element from column IVa of Mendeleev's periodic table and R1and R2each represent alkyl groups of 1 to 20 carbon atoms or cycloalkyl or phenyl groups of 6 to 20 carbon atoms, X represents a halogen atom, L represents an optional complexing molecule, such as an ether, and optionally a substantially less complexing molecule, such as toluene, p is a natural integer greater than or equal to 1 and x is greater than or equal to 0, and(ii) a co-catalyst selected from alkylmagnesiums, alkyllithiums, alkylaluminums, Grignard reagents and mixtures of these constituents.

REFERENCES:
patent: 6348555 (2002-02-01), Lai et al.
patent: 6569799 (2003-05-01), Barbotin et al.
patent: 0 891 993 (1999-01-01), None

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