Patent ID: 6465609
Filing Date: 2002-10-15
Classification: C08C,C08F

Abstract:
A method of removing metal catalyst from hydrogenated polymer obtained by selective hydrogenation method of olefinic double bonds in a polymer of a conjugated diene monomer or a copolymer of a conjugated diene monomer and an aromatic vinyl monomer in the presence of a catalyst comprising an organotitanium compound alone or in combination with a reducing agent,wherein the method of removing metal catalyst comprises (1) removing with or without removing an alcohol layer through separation after adding alcohol containing 1 to 10 v/v % of HCl an amount of 1/2 to 1/20 in volume ratio with respect to the hydrogenated polymer, (2) removing with a water layer through separation after adding water an amount of 1/2 to 1/20 in volume ratio with respect to the hydrogenated polymer.