A method for producing a branched conjugated diene polymer, a method for producing a rubber composition, a method for producing a tire, a branched conjugated diene polymer, and a branched conjugated diene polymer composition.

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a branched conjugated diene polymer having excellent fuel efficiency, abrasion resistance, wet skid resistance and breaking strength. A conjugated diene having an active terminal is obtained by polymerizing or copolymerizing a conjugated diene compound or a conjugated diene compound and an aromatic vinyl compound using an alkali metal compound or an alkaline earth metal compound as a polymerization initiator. A branched conjugated diene polymer having a polymerization step of obtaining a system polymer and a branching step of reacting a styrene derivative as a branching agent with the active terminal of the conjugated diene polymer to introduce a branched structure. Production method. [Selection diagram] None