CATALYST FOR USE IN POLYMERIZATION OF CONJUGATED DIENE CONJUGATED DIENE POLYMER AND MODIFIED CONJUGATED DIENE POLYMER EACH PRODUCED USING SAID CATALYST METHODS RESPECTIVELY FOR PRODUCING SAID POLYMERS RUBBER COMPOSITION FOR TIRES AND RUBBER COMPOSITION FOR RUBBER BELTS

摘要

A conjugated diene polymerization catalyst capable of producing a highly active conjugated diene polymer having a high cis-1,4 structure content, and a conjugated diene polymer using the same, a modified conjugated diene polymer, a method for producing them, a rubber composition for tires, and Provided is a rubber composition for a rubber belt. Nonmetallocene type gadolinium compound (A) represented by the general formula (1), an ionic compound (B) composed of non-coordinating anions and cations, and elements selected from Groups 2, 12, and 13 of the periodic table It is a conjugated diene polymerized catalyst comprising the organometallic compound (C), a conjugated diene polymer using the same, a modified conjugated diene polymer, a method for producing them, a rubber composition for tires, and a rubber composition for rubber belts.