Abstract
Water-in-oil (W/O) -type emulsification was studied using an inclusion compound consisting a nonionic surfactant and organophilic montmollironite (Or-Mon). This compound (S·Or-Mon) swelled in oils such as liquid paraffin, resulting in the formation of a gel. When water was added further to a rapidly stirred oil gel, a stable W/O-type emulsion was obtained. In this system, S. Or-Mon should function as a W/O-type emulsifier on the water/oil interface. The W/O-type emulsion containing 70 wt% water was quite stable and highly viscous without solid paraffin contained in the ordinary W/O-type emulsion to cause the system to be hard. The system containing considerable glycerol was easily emulsified by S. Or-Mon.
