PROBLEM TO BE SOLVED: To provide an O/W/O Pickering emulsion which can be prepared even by only one-stage emulsification step without using a surfactant, is produced in a high yield, and is excellent in long-term stability.SOLUTION: The O/W/O Pickering emulsion is in a state where aqueous phase particles having confined oil phase particles in the inner part thereof are dispersed in an oil phase. Organic silicone particulates containing specific hollow hemispherical organic silicone particulates are localized in the interfaces between the aqueous phase and the oil phases on the both sides thereof. The emulsion contains 10-35 mass% of the aqueous phase, 55-80 mass% of the oil phases, and 1-10 mass% of the organic silicone particulates (a total of 100 mass%).COPYRIGHT: (C)2011,JPO&INPIT【課題】界面活性剤を使用するまでもなく、1段階の乳化工程のみでも調製することができ、しかも生成率が高く、同時に長期間の安定性にも優れたO/W/O型ピッケリングエマルションを提供する。【解決手段】内部に油相の粒子を閉じ込めた水相の粒子が油相中に分散した状態のO/W/O型ピッケリングエマルションにおいて、水相とその両側の油相との界面に特定の中空半球状有機シリコーン微粒子を含有する有機シリコーン微粒子を局在させ、且つ水相を10~35質量%、油相を55~80質量%及び有機シリコーン微粒子を1~10質量%(合計100質量%)の割合で含有して成るものとした。【選択図】図2
