METHOD FOR MANUFACTURING CHLOROPRENE-BASED POLYMER COMPOSITION, CHLOROPRENE-BASED POLYMER COMPOSITION, DIP-MOLDED BODY AND METHOD FOR MANUFACTURING DIP-MOLDED BODY

A method for producing a chloroprene-based polymer composition, by which a polymerization solution that has a sufficiently high polymer concentration in the resulting polymerization can be obtained and a target solid content concentration can be reached in a short time; the formation of aggregates during polymerization can be to suppressed; and a chloroprene-based polymer composition having high stability after polymerization and hardly generating aggregates can be obtained, at the same time, is provided.According to the present invention, a method for producing a chloroprene-based polymer composition containing chloroprene-based polymer, comprising a polymerization step, wherein: in the polymerization step, chloroprene, or chloroprene and a monomer copolymerizable with chloroprene, are polymerized until reaching polymerization completion conversion; the polymerization step includes a monomer addition step and an emulsifier addition step, when a total amount of monomer used in the polymerization step is 100%, an initial addition amount of monomer at start of polymerization is X%; in the monomer addition step, when the initial addition amount of the monomer is 100%, a remaining monomer is added to the polymerization system from time when polymerization progresses and Y% of the monomer initially added converts, by reaching the polymerization completion conversion; in the emulsifier addition step, when the total amount of monomer used in the polymerization step is 100%, emulsifier is added from time when polymerization progresses and Z% of the monomer converts by reaching the polymerization completion conversion; and X, Y and Z satisfy following relationship. 1≤XY/100≤4020≤Z≤75−65≤Y−Z≤50