Patent ID: 6951906

Claim:
Process for hydrogenating a conjugated diene polymer, wherein it comprises: polymerizing at least one conjugated diene monomer or copolymerizing said monomer with a vinyl aromatic monomer using an organo alkali metal as an initiator thereby forming a living polymer; deactivating the terminal of said living polymer using a terminating agent in an equimolar amount; and hydrogenating the unsaturated double bonds in the conjugated diene units of the polymer by the addition of lithium hydride (LiH) and monocyclopentadienyl titanium compound represented by the following formula I, together with hydrogen, to the polymer having an inactivated terminal; Where, Cp is a cyclopentadienyl group(C 5 H 5 ); R 1 and R 2 are the same or different and are selected from halogen atom; R 3 and R 4 are the same or different and are selected from hydrogen atoms, alkyl or alkoxy group containinig 1 to 12 carbon atoms, aryl or aryloxy groups containing 6 to 20 carbon atoms and cycloalkyl groups containing 6 to 20 carbon atoms.