To provide a process for preparing a W/O (Water-in-Oil) emulsion, having a wide tolerable range of conditions.
The process for preparing the W/O emulsion includes a step of adding water, which forms an aqueous phase of the emulsion, to oil that contains a substance to be emulsified and forms an oil phase of the emulsion, and mixing the oil and the water, wherein the water contains closed vesicles formed from an amphiphilic substance that forms closed vesicles spontaneously, and/or particles of a hydroxyl-containing condensation polymer. It is preferable to perform mixing by initiating agitation before the addition of the water to the oil is completed. It is further preferable to add the water in an amount of at most 50 mass% to the amount of the oil-containing object to which the water is added.
IMAI YOKO
MAEDA CONSTRUCTION
TSUKISHIMA KIKAI CO
| JPH116615A | 1999-01-12 | |||
| JP2010104946A | 2010-05-13 | |||
| JP2006241424A | 2006-09-14 |
正林 真之