PROBLEM TO BE SOLVED: To provide surface-treated powder having excellent water repellency and oil repellency, smooth touch and good adhesion during application to the skin, to produce the surface-treated powder by inexpensive and simple operation, and to provide a cosmetic containing the surface-treated powder formulated therein.SOLUTION: There are provided the surface-treated powder including the surface of base powder treated with a silane compound having a perfluoropolyether chain represented by general formula (1) or (2) and further the surface-treated powder including the surface of the base powder treated with the silane compound having the perfluoropolyether chain and the existing surface-treating agent other than the silane compound, preferably a perfluoropolyether phosphate. In addition, there are provided a method for producing the surface-treated powder and the cosmetic containing the surface-treated powder formulated therein.COPYRIGHT: (C)2012,JPO&INPIT【課題】撥水性、撥油性に優れ、肌への塗布時の感触が滑らかで付着性も良好な表面処理粉体及びこの表面処理紛体を安価かつ簡単な操作で製造すること、並びにこの表面処理粉体を配合した化粧料を提供することにある。【解決手段】一般式(1)又は(2)のパーフルオロポリエーテル鎖を有するシラン化合物によって基材粉体の表面が処理されていることを特徴とする表面処理粉体、また、前記パーフルオロポリエーテル鎖を有するシラン化合物とそれ以外の既存の表面処理剤、好ましくはパーフルオロポリエーテルリン酸エステルによって基材粉体の表面が処理されていることを特徴とする表面処理粉体、更には上記表面処理粉体の製造方法、及びこの表面処理粉体を配合した化粧料。【選択図】なし
