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Conjugated diene polymerization catalyst, conjugated diene polymer, modified conjugated diene polymer using the same, production method thereof, rubber composition for tire, and rubber composition for rubber belt
Conjugated diene polymerization catalyst, conjugated diene polymer, modified conjugated diene polymer using the same, production method thereof, rubber composition for tire, and rubber composition for rubber belt
Provided are a catalyst for a conjugated diene polymerization capable of producing a conjugated diene polymer having a high content of cis-1,4-structures with a high activity, a conjugated diene polymer and a modified conjugated diene polymer using the same, production methods thereof, a rubber composition for a tire, and a rubber composition for a rubber belt. Described are a catalyst for a conjugated diene polymerization including: a non-metallocene type gadolinium compound (A) represented by the general formula (1); an ionic compound (B) formed of a non-coordinating anion and a cation; and an organic metal compound (C) of an element selected from the group consisting of a group 2, a group 12, and a group 13 of the periodic table, a conjugated diene polymer and a modified conjugated diene polymer obtained using the same, production methods thereof, a rubber composition for a tire, and a rubber composition for a rubber belt.
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