Provided is a method for coating the surfaces of inorganic particles with a silicone compound wherein the method makes it possible to readily produce a more uniform coating, to reduce residual Si-H groups in the coating even when methyl hydrogen polysiloxane or another such silicone compound having Si-H groups is used, and to reduce the amount of hydrogen gas generated. A solution containing a silicone compound modified by the addition of an alkali, and an inorganic particle slurry are mixed in a wet grinding machine or a wet mixing machine, or a solution containing a silicone compound to which an alkali has been added, and an inorganic particle powder are mixed in a dry grinding machine or a dry mixing machine, and the surfaces of the inorganic particles are coated with the silicone compound. Dimethyl polysiloxane, methyl hydrogen polysiloxane, or the like is used as the silicone compound. Microparticulate titanium oxide, microparticulate zinc oxide, titanium dioxide, and zinc oxide are best as the inorganic particles.本發明係提供一種於無機粒子之表面被覆聚矽氧化合物之方法,其係可簡便地製作更均勻被覆,而且即使使用甲基氫聚矽氧烷等之具有Si-H基之聚矽氧化合物,其被覆中之Si-H基殘留亦少,可減低氫氣產生量之方法。本發明之方法係以濕式粉碎機或濕式混合機混合含有添加鹼而改質之聚矽氧化合物之液體與無機粒子漿液,或者以乾式粉碎機或乾式混合機混合含有添加鹼之聚矽氧化合物之液體與無機粒子粉體,而於無機粒子表面被覆聚矽氧化合物。至於聚矽氧化合物係使用二甲基聚矽氧烷、甲基氫聚矽氧烷等。至於無機粒子以微粒子氧化鈦、微粒子氧化鋅、二氧化鈦、氧化鋅最適宜。
