PROBLEM TO BE SOLVED: To provide an external preparation for skin which has a sufficient ultraviolet light-preventing effect and a good feeling of use in an external preparation for skin containing an ultraviolet light absorbent, and to provide a particulate metal oxide which is contained in such an external preparation for skin.SOLUTION: A particulate metal oxide is obtained by treating the surface of the particulate metal oxide with (a) organopolysiloxane containing at least one SiH in one molecule, and (b) organopolysiloxane having at least one phenyl group. Further, the external preparation for skin having a sufficient ultraviolet light-preventing effect and having a good feeling of use is obtained by containing the particulate metal oxide in an external preparation for skin.COPYRIGHT: (C)2015,JPO&INPIT【課題】紫外線吸収剤を配合させた皮膚外用剤において、十分な紫外線防御効果を有し、かつ良好な使用感を有する皮膚外用剤を提供する。また、このような皮膚外用剤に含有させる微粒子金属酸化物を提供する。【解決手段】(a)1分子中に少なくとも1つのSiHを含むオルガノポリシロキサン、及び(b)少なくとも1つのフェニル基を有するオルガノポリシロキサンで微粒子金属酸化物の表面を処理することで、微粒子金属酸化物を得る。また、該微粒子金属酸化物を皮膚外用剤に配合することで、十分な紫外線防御効果を有し、かつ良好な使用感を有する皮膚外用剤を得る。【選択図】なし
