| abstract |
There is provided a method for producing a polymer latex, including a polymerization step of polymerizing a monomer in an organic solvent to thereby obtain a polymer solution of synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer, an antioxidant addition step of adding an antioxidant to the polymer solution of synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer at a proportion of 0.01 to 1.00 parts by weight per 100 parts by weight of the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer, and an emulsification step of emulsifying the polymer solution to which the antioxidant is added, in water in the presence of a surfactant, to thereby obtain a polymer latex, wherein the emulsification is performed in the emulsification step so that the ratio D75/D25 of the volume particle size D75 at a cumulative frequency of 75% to the volume particle size D25 at a cumulative frequency of 25% of a particle of the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer included in the polymer latex is 1.90 or more and 2.30 or less. |