PROBLEM TO BE SOLVED: To provide novel composite fine particles having novel superior properties and being suitable for cosmetics and light diffusion members.SOLUTION: The composite fine particles are synthesized by a step including steps of: preparing a reaction liquid by mixing spherical silicon fine particles, a solvent, a polymerizable monomer having one unsaturated group, a polymerizable monomer having two or more unsaturated groups, a polymerization initiator, and a dispersion stabilizer together turning the reaction liquid into droplets and polymerizing the droplets. A spherical silicon fine particle dispersion may be used as the spherical silicon fine particles and the solvent.COPYRIGHT: (C)2013,JPO&INPIT【課題】従来にはない優れた特性が得られ、化粧料または光拡散部材に適した新規複合微粒子を提供する。【解決手段】球状シリコン微粒子、溶媒、不飽和基を1個有する重合性単量体および不飽和基を2個以上有する重合性単量体、重合開始剤、分散安定剤を混合して反応液を調整する工程と、前記反応液を液滴化する工程と、前記液滴を重合する工程、を含む工程によって合成されることを特徴とする複合微粒子。前記球状シリコン微粒子および前記溶媒として、球状シリコン微粒子分散液を用いてもよい。【選択図】図4
