PROBLEM TO BE SOLVED: To provide a surface-treated powder which can be treated safely and conveniently and has excellent dispersibility to various dispersion media and an excellent use feeling such as good extensibility or skin compatibility when blended in a cosmetic.SOLUTION: There is provided a surface-treated powder which comprises (a) inorganic fine particles having an average particle diameter of 5 to 100 nm, as measured using a transmission electron microscope and (b) one or more carboxylic acid-modified silicones, wherein a part or the whole of the surface of the inorganic fine particles is treated with the carboxylic acid-modified silicones.COPYRIGHT: (C)2015,JPO&INPIT【課題】安全且つ簡便に処理することができるとともに、様々な分散媒に対して優れた分散性を有し、且つ、化粧料に配合した際にのびや肌なじみが良いといった優れた使用感を有する表面処理粉体を提供すること。【解決手段】(a)透過電子顕微鏡を用いて測定した平均粒子径が5~100nmの無機微粒子と、(b)1種類以上のカルボン酸変性シリコーンとを含み、前記無機微粒子の表面の一部又は全部が、前記カルボン酸変性シリコーンで処理されている、表面処理粉体。【選択図】図1
