Abstract: Provided is latex that is useful in a novel technique which (a) has a reduced environmental impact, (b) has excellent dispersibility of fine polymer particles, and (c) enables efficient collection of fine polymer particles from a latex. Specifically, provided is a latex including, by a specific amount, fine polymer particles (A) having a graft part which is constituted by a polymer that contains a specific structural unit, and a resin (B) having predetermined viscosity. The surfaces of the fine polymer particles (A) are covered with the resin (B).

Abstract: A resin composition is produced by a method including a step of rapidly freezing a latex containing fine polymer particles (A), a step of thawing the latex which has been frozen in the preceding step, a step of mixing, into the latex which has been subjected to the preceding step, a resin (B) having a specific viscosity, and after the preceding steps, a step of separating the latex into a resin composition and a water component. The resin composition is an agglutinate containing the fine polymer particles (A) and the resin (B).

Abstract: A resin composition is produced by a method including a washing step of washing a resin composition with water. The resin composition contains fine polymer particles (A) and a resin (B). The fine polymer particles (A) have a graft part that is constituted by a polymer containing, as one or more structural units, one or more structural units derived from at least one type of monomer selected from the group consisting of aromatic vinyl monomers, vinyl cyanide monomers, and (meth)acrylate monomers. The resin (B) has a given viscosity, in a case where a total amount of the fine polymer particles (A) and the resin (B) is regarded as 100% by weight, an amount of the fine polymer particles (A) being 1% by weight to 70% by weight and an amount of the resin (B) being 30% by weight to 99% by weight.