Patent ID: 6379680
Filing Date: 2002-04-30
Classification: A61K,A61Q,B82Y,Y10S

Abstract:
An emulsifier-free cosmetic or dermatological preparation, which preparation is a finely dispersed water-in-oil system, said preparation comprisinga) an oil phase; b) an aqueous phase; and c) micronized, inorganic pigments particles positioned at an interface of said oil phase and said aqueous phase, said micronized, inorganic pigment particles: i) have an average particle size of less than 200 nm; ii) have both hydrophilic and lipophilic properties resulting in an amphiphilic character; and iii) selected from the group consisting of metal oxides, which are coated on the surface thereof with: (A) a dimethylpolysiloxane and/or silica gel; and (B) aluminium hydroxide and/or alumina and/or silicon dioxide; and d) optionally cosmetic or pharmaceutical auxiliaries, additives and/or active substances.