Patent ID: 11873364
Assignee: SUMITOMO CHEMICAL COMPANY LIMITED
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 5:
6. The method for producing the conjugated diene rubber according to claim 1, wherein
the first step comprises:
a step of polymerizing a monomer (a) containing isoprene using the polymerization initiator in the inert solvent to form a polymer block (A) having an active end; and
a step of mixing the polymer block (A) having the active end and a monomer (b) containing 1,3-butadiene to continue polymerization reaction, so as to obtain the conjugated diene polymer chain that has an active end and comprises the polymer block (A) and the polymer block (B), and

the vinyl compound having the functional group interactive with the silica is contained in at least one of the monomer (a) and the monomer (b).