Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2008-11-13
2010-10-26
Lee, Rip A. (Department: 1796)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S128000, C502S114000, C502S117000, C502S230000, C526S169100, C526S172000, C526S161000, C526S133000, C526S157000, C526S137000, C526S144000, C526S153000
Reexamination Certificate
active
07820580
ABSTRACT:
A nickel-carbene polymerization catalyst system for preparing high cis polydienes is provided. The catalyst system comprises (a) a nickel N-heterocyclic carbene complex, (b) an organoaluminum compound, (c) a fluorine-containing compound, and (d) optionally, an alcohol. Also provided is a process for producing a polydiene comprising reacting a conjugated diene in the presence of a polymerization catalyst comprising (a) a nickel N-heterocyclic carbene complex, (b) an organoaluminum compound, (c) a fluorine-containing compound, and (d) optionally, an alcohol.
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Hayes Michael W.
Poulton Jason T.
Qin Zengquan
Bridgestone Corporation
Hooker Meredith E.
Lee Rip A.
Lewis Nathan
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