Living polymer hydrogenation catalyst and process for hydrogenating polymers with the catalyst

摘要

This invention is to provide a process for the hydrogenation of conjugated diene polymer in an inert organic solvent, said polymer being obtained by polymerization or copolymerization of a conjugated diene, which comprise effecting selective hydrogenation of unsaturated double bonds in the conjugated diene units of said conjugated diene polymer in the presence of catalyst represented by the following formula (I) wherein Cp is cyclopentadienyl (C5H-); X1 and X2 are each independently a hologen atom, such as, chlorine or bromine; Y is carbon or nitrogen atom; and R1, R2 and R3 are each independently hydrogen atom or C1-C4 lower alkyls.