PROBLEM TO BE SOLVED: To provide a W/O emulsion composition which contains plate-shaped particles of an organically modified clay mineral and which has a low viscosity and does not suffer from separation even at high temperature.SOLUTION: The W/O emulsion composition is characterized by including (A) plate-shaped particles of an organically modified clay mineral which have a mean thickness of 0.1 &mum or less and a mean major axis of 0.5 to 50 &mum and (B) a branched-chain silicone which is co-modified with both polyoxyalkylene and alkyl, and having a viscosity of 10,000 mPa s or less. Further, the viscosity stability of the W/O emulsion composition after the lapse of time can be improved by adding (C) a glycerol which is modified with a silicone at both terminals.COPYRIGHT: (C)2012,JPO&INPIT【課題】有機変性粘土鉱物板状粒子を用いたW/O乳化組成物において、低粘度でしかも高温での分離のないW/O乳化組成物を提供する。【解決手段】(A)平均厚さが0.1μm以下、平均長径が0.5~50μmの板状粒子である有機変性粘土鉱物と、(B)ポリオキシアルキレン・アルキル共変性分岐鎖シリコーンと、を含有し、粘度が10,000mPa・s以下であることを特徴とするW/O乳化組成物。さらに、(C)両末端シリコーン化グリセリンを配合することにより、経時での粘度安定性が改善される。【選択図】 なし
