Patent ID: 6313230
Filing Date: 2001-11-06
Classification: C08C,C08F

Abstract:
A process for hydrogenation of conjugated diene polymers comprising hydrogenating said polymer in the presence of hydrogen and a hydrogenation catalyst composition comprising:(a) at least one titanium compound represented by the following formula (a): ##STR14##wherein R.sup.1 and R.sup.2, which may be the same or different, represent a halogen atom, an alkyl group, an aryl group, an arakyl group, a cycloalkyl group, an aryloxy group, an alkoxy group or a carbonyl group, and Cp* represents a cyclopentadienyl group or a derivative having the formula of C.sub.5 R.sub.5, and R.sub.5, which may be the same or different, represents a hydrogen atom, an alky group, an araikyl group and an aryl group;(b) at least one silyl hydride selected from the group consisting of(i) a monomeric silyl hydride represented by the following formula (i): ##STR15##wherein X.sub.1, X.sub.2 and X.sub.3, which may be the same or different, represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an aralkyl group, a cycloalkyl group, an aryloxy group, an alkoxy group, an acyloxy group or a carboxylate group,(ii) a polymeric silyl hydride represented by the following formula (ii): ##STR16##wherein each R can be the same or different and is selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an aralkyl group, a cycloalkyl group, an aryloxy group and an alkoxy group and n.gtoreq.(),(iii) a cyclic silyl hydride represented by the following formula (iii): ##STR17##wherein R represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an aralkyl group, a cycloalkyl group, an aryloxy group or an alkoxy group and n=2, 3, 4 or 5, and(iv) a silazan represented by the following formula (iv): ##STR18##wherein, R.sup.a, R.sup.b, R.sup.c, which may be The same or different, represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an aralkyl group, a cycloalkyl group, an aryloxy group or an alkoxy group; and optionally(c) at least one metallic compound selected from the group consisting of an organoaluminum compound, an organomagnesium compound, an organolithium compound, an organozinc compound, a lithium hydride and LiOR.sup.3, wherein R.sup.3 represents an alkyl group, an aryl group, an aralkyl group or a cycloalkyl group.