| abstract |
PROBLEM TO BE SOLVED: To provide a novel catalyst system of a Group IIIB metal compound of the periodic table and a method for producing a controlled conjugated diene polymer with high activity using the polymerization catalyst. Aim. (A) A compound of a metal of Group IIIB of the periodic table, (B) an ionic compound of a non-coordinating anion and a cation, and (C) a catalyst obtained from an organometallic compound of an element of Groups I to III of the periodic table, and a conjugated diene compound using the catalyst. And a method for producing a conjugated diene polymer. |