Composition and method for producing composition

A method for producing a composition, comprising:

• a first step of mixing an aqueous latex containing fine polymer particles (A) with an organic solvent that exhibits partial solubility in water to obtain a resulting mixture, and then bringing the resulting mixture into contact with water to generate an agglutinate of the fine polymer particles (A) in an aqueous phase, wherein the agglutinate contains the organic solvent;
• a second step of separating and collecting the agglutinate from the aqueous phase, and then mixing the agglutinate with the organic solvent to obtain a first organic solvent dispersion slurry containing the fine polymer particles (A);
• a third step of mixing:
• the first organic solvent dispersion slurry,
• a low molecular weight compound (B) that has at least one polymerizable unsaturated bond in a molecule of the low molecular weight compound (B) and has a molecular weight of less than 1,000, and
• a radical scavenger (C) of hindered phenol base
• to obtain a second organic solvent dispersion slurry containing the fine polymer particles (A), the low molecular weight compound (B), and the radical scavenger (C);
• and
• a fourth step of distilling off the organic solvent from the second organic solvent dispersion slurry,
• wherein the first step, the second step, the third step, and the fourth step are carried out in an order of the first step, the second step, the third step, and the fourth step,
• the fine polymer particles (A) contain a rubber-containing graft copolymer including an elastic body and a graft part grafted to the elastic body,
• the elastic body contains at least one selected from the group consisting of diene-based rubbers, (meth)acrylate-based rubbers, and organosiloxane-based rubbers, and
• in the third step, the fine polymer particles (A) and the low molecular weight compound (B) is mixed at a blending ratio in which an amount of the fine polymer particles (A) is 1% by weight to 50% by weight and an amount of the low molecular weight compound (B) is 50% by weight to 99% by weight, where 100% by weight represents a total amount of the fine polymer particles (A) and the low molecular weight compound (B).