Patent ID: 7612148

Claim:
A catalyst composition for hydrogenating a polymer having a conjugated diene, comprising: (a) a first composition having one of a titanium compound of a formula (I): wherein: R 1 and R 2 are ones selected from the group consisting of hydrogen, halogen, C 1 ˜C 8 alkyl, C 1 ˜C 8 alkoxy, C 6 ˜C 12 cycloalkyl, phenyl, phenoxy, C 7 ˜C 10 arylalkoxy, C 7 ˜C 10 arylalkyl, carboxy, —CH 2 P(phenyl) 2 , —CH 2 Si(C 1 ˜C 5 alkyl) 3 and —P(phenyl) 2 ; and Cp* is one selected from the group consisting of cyclopendienyl, fluorenyl, indenyl and derivatives thereof, (b) a second composition having one of a first compound of a formula (II) and a second compound of a formula (III): wherein R is one selected from the group consisting of C 1 ˜C 12 alkyl, C 3 ˜C 12 cycloalkyl, aryl, and alkyl aryl, M is one selected from the group consisting of C 1 ˜C 12 alkyl, C 1 ˜C 12 alkoxy, aryl, alkyl aryl, phenoxy and hydroxyl and n=1 to 3; and (c) a third composition having an alkylaluminum compound of a formula (IV): wherein the R 4 , R 5 and R 6 are ones selected from the group consisting of C 1 ˜C 12 alkyl, C 6 ˜C 12 aryl, hydrogen and halogen.