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US Patent 7820580 Nickel-based catalysts for preparing high cis 1,4-polydienes

Patent 7820580 was granted and assigned to Bridgestone on October, 2010 by the United States Patent and Trademark Office.

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Patent 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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