Patent ID: 7868103
Filing Date: 2011-01-11
Classification: C08C,C08F

Abstract:
1. A method for producing a polybutadiene, which comprises firstly subjecting 1,3-butadiene to cis-1,4 polymerization, and subsequently subjecting a resultant in resulting polymerization system to syndiotactic-1,2 polymerization, the method being characterized in that there is added, to terminate the polymerization , a halogen acid or a halogen acid salt, both represented by the following general formula (I): (wherein M′ is a metal atom or a hydrogen atom; X′ is a halogen atom selected from chlorine, bromine and iodine; O is an oxygen atom; q is an integer of 1 to 4; Z′ is an anion capable of bonding to M′; r is an integer of 1 or more; and r+s is the oxidation number of M′).