PROCESS FOR HYDROGENATING A CONJUGATED DIENE POLYMER

摘要

This invention relates to a process for selectively hydrogenating unsaturat ed double bonds in conjugated diene units of a homopolymer or copolymer. By usi ng a highly active novel homogeneous organo titanium catalyst represented by formula (I) (see formula I) wherein, Cp is a cyclopentadienyl group (C5H5); R1 and R2 are the same or different and are a halogen atom; R3 and R4 are the same or different and are selected fro m hydrogen atoms, alkyl or alkoxy group containing 1 to 12 carbon atoms, aryl or arylox y groups containing 6 to 20 carbon atoms and cycloalkyl groups containing 6 to 20 carbon atoms.