Development of Silicone W/O Emulsions and Application to Cosmetic Foundations

W/O emulsions are suitable for cosmetic foundations, as they are excellent in water repellency. In particular when silicone oils are used for the oil a feeling of W/O emulsions is good. In order to obtain the structure condition as W/O type surfactants to prepare stable W/O silicone emulsions, glycerylether derivatives with silicone chains were focused on. And stable low-viscosity W/O emulsions were prepared by using the most suitable glycerylether modified silicone. And the addition of ethanol to W/O silicone emulsion gives good feeling but makes emulsion stability worse seriously. In this report, I introduced that the W/O silicone emulsion which contained ethanol was stabilized by the amphiphilic polymer (OXP-SI). The emulsion obtained from the region of the particular silicone / ethanol ratio in which the polymer was dissolved extending was stable and had elastic properties. In this paper stabilization mechanisms and the application example for cosmetic foundations are discribed.