Patent ID: 8278395

Claim:
A process for manufacturing a modified conjugated diene-based polymer having a modifying group in a molecule thereof, the process comprising: a step of obtaining a conjugated diene-based polymer by polymerizing a conjugated diene compound, or a conjugated diene compound and an aromatic vinyl compound, by using an alkaline metal-based initiator or an alkaline earth metal-based initiator in a hydrocarbon solvent; and a step of reacting active terminals of the polymer with a glycidylamino group-containing organic compound having a molecular weight of 1,000 or lower and having two or more tertiary amino groups and three or more glycidyl groups bonded to the amino groups in a molecule of the compound, and an oligomer of a dimer or more of the organic compound as modifying agents, wherein the reaction is performed using 75 to 95% by mass of the organic compound and 25 to 5% by mass of the oligomer based on the total amount of the modifying agents.