abstract |
PROBLEM TO BE SOLVED: To provide a method for producing a conjugated diene polymer having a high 1,4-cis structure content with an yttrium compound as a catalyst with high efficiency. SOLUTION: (A) an yttrium compound, (B) an ionic compound composed of a non-coordinating anion and a cation, and (C) an organometallic compound of an element selected from Groups 2, 12, and 13 of the periodic table And (D) a method for producing a conjugated diene polymer, wherein a conjugated diene compound is polymerized using a catalyst obtained from an ether compound or a thioether compound. [Selection figure] None |