Patent ID: 8404762

Claim:
A method for producing a core-shell microparticle comprising: preparing a monomer mixture containing 15 to 99% by mass of a crosslinkable monomer having a plurality of vinyl groups and 1 to 85% by mass of an alkoxyamine group-containing monomer; producing a monodispersed organic seed particle by polymerizing an oil soluble monomer in an aqueous medium that does not dissolve both of the oil soluble monomer and the monodispersed organic seed particle; impregnating the monodispersed organic seed particle that is dispersed in the aqueous medium with the monomer mixture that contains the alkoxyamine group-containing monomer; adding a polymerization initiator to initiate polymerization of the monomer mixture that is absorbed in the monodispersed organic seed particle to produce a monodisperse crosslinked microparticle having an alkoxyamine group introduced thereto; and heating the monodisperse crosslinked microparticle and a monomer to perform graft polymerization.