Method for manufacturing polymer latex

A method for producing a polymer latex, comprising:

• an emulsification step of mixing a polymer solution obtained by dissolution of synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer in an organic solvent, with an aqueous solution comprising 0.1 to 15 parts by weight of a rosinate based on 100 parts by weight in total of the synthetic polyisoprene and the styrene-isoprene-styrene block copolymer, and emulsifying the resultant in water to thereby obtain an emulsified liquid;
• a solvent removal step of removing the organic solvent in the emulsified liquid;
• and
• a concentration step of concentrating the emulsified liquid from which the organic solvent is removed, and also adjusting a content rate of the rosinate in the emulsified liquid in the range of 0.1 to 3 parts by weight based on 100 parts by weight in total of the synthetic polyisoprene and the styrene-isoprene-styrene block copolymer in the emulsified liquid,
• wherein an amount of water for use in the emulsification step is 50 to 100 parts by weight based on 100 parts by weight of the polymer solution of the synthetic polyisoprene and the styrene-isoprene-styrene block copolymer.