EFFECTIVE HYDROGENATION METHOD OF CONJUGATED DIENE POLYMER

摘要

PROBLEM TO BE SOLVED: To provide a hydrogenation method of a conjugated diene polymer capable of obtaining a high rate of the hydrogenation with less amount of a catalyst for a short time. ;SOLUTION: The improved hydrogenation method of the conjugated diene polymer polymerized using an organic alkali metal compound as a polymerization initiator is provided, in which a metalocene hydrogenation catalyst is divided and added at least two times and addition time of an additional catalyst is determined from a hydrogen absorption rate for obtaining the hydrogenated polymer with hydrogenation ratio being ≥98%.;COPYRIGHT: (C)2001,JPO