PROBLEM TO BE SOLVED: To provide a high-density vesicle water dispersion which is at a low viscosity notwithstanding the nonuse of a special viscosity-reducing agent.SOLUTION: This vesicle water dispersion contains a vesicle composed of a mixture of 10 to 50 mass% mono-long-chain cationic surfactant, 30 to 70 mass% di-long-chain cationic surfactant and 0 to 30 mass% tri-long-chain cationic surfactant as a membrane forming component. In addition, the vesicle water dispersion is characterized in that the vesicle is of a multi-lamellar structure with 0.3 to 10 &mum average particle diameter, the density of the gross amount of the membrane forming component is 20 to 40 mass% for the total amount of the vesicle water dispersion as a reference, and the viscosity at 25 °C of the vesicle water dispersion is not more than 3,000 mPa s.COPYRIGHT: (C)2008,JPO&INPIT【課題】特別な減粘剤を使用していないのにも関わらず、低粘度である高濃度ベシクル水分散液を提供すること。【解決手段】10~50質量%のモノ長鎖型カチオン性界面活性剤と、30~70質量%のジ長鎖型カチオン性界面活性剤と、0~30質量%のトリ長鎖型カチオン性界面活性剤との混合物を膜形成成分とするベシクルを含むベシクル水分散液であって、該ベシクルは平均粒子径が0.3~10μmのマルチラメラ構造を有し、ベシクル水分散液の全量を基準にして膜形成成分の総量の濃度が20~40質量%であり、ベシクル水分散液の25℃における粘度が3000mPa・s以下であるベシクル水分散液。【選択図】なし
