METHOD FOR PRODUCING POLYMER

摘要

A method for producing a polymer, which comprises carrying out a polymerization step of polymerizing at least a conjugated diene monomer in a hydrocarbon solvent using an organic lithium compound as a polymerization initiator to produce a polymer and, subsequent to the polymerization step, carrying out steps (1) to (4) as mentioned below sequentially: (1) a step of mixing an acid and 20 to 300 parts by mass of water with 100 parts by mass of a solution containing the polymer; (2) a step of reducing the amount of water to 10 parts by mass or less relative to 100 parts by mass of the solution containing the polymer; (3) a step of adding a carbon dioxide gas and/or a compound capable of decarbonation to the solution containing the polymer; and (4) a step of desolvating the solution containing the polymer until the concentration of the polymer becomes 95 mass% or more.