| abstract |
(57) [Summary] [PROBLEMS] To provide a method for easily selecting and producing fine particles capable of releasing a target component over a long period of time or fine particles capable of releasing a target component at a predetermined time. A method for producing a fine particle encapsulating a target component, in which a mixture containing a target component, the following monomer component, the following auxiliary polymer and an initiator is dispersed in an aqueous solution of a dispersion stabilizer, and suspension polymerization is performed. Monomer component: crosslinkable monomer, crosslinkable monomer and monofunctional monomer, or monofunctional monomer auxiliary polymer: low compatibility with polymer which is a polymer or copolymer of monomer component, and between water Polymer whose interfacial tension is higher than that of polymer |