Oil Repellency Mechanism of Oil Wax Gel Using a Novel Perfluoroalkylether Modified Silicone and Its Application to Cosmetics

Abstract

We have developed perfluoroalkyl modified silicone oil (FSO) which could improve the long-lasting performance of cosmetics. FSO is superior in usability but it lacks sufficient adhesion and sebum-resistant properties. Therefore, we tried to develop a novel perfluoroalkyl/alkyl (Rf/Rh) co-modified silicone wax (FSW) which would improve long-lasting performance dramatically with the use of FSO. The contact angle value (to squalane) of FSW/FSO oil wax gel scored remarkably high when the Rh/Rf ratio was specific. We concluded that the contact angle value became high when FSO was held in FSW fine crystals whose growth was mutually inhibited by Rh and Rf. The liquid foundation using FSW/FSO was highly valued on the point of persistence compared to one using only perfluoroalkyl modified silicone wax/FSO.