Patent ID: 6582707
Filing Date: 2003-06-24
Classification: A61K,A61Q,B82Y,Y10S

Abstract:
Pickering emulsions, which are finely disperse water-in-oil or oil-in-water systems, comprising(1) an oil phase which comprises at least 0.5% by weight, based on the weight of the oil phase, of at least one oil component chosen from the group of oils having a viscosity which is less than 30 mPaÂ·s (measured at a shear gradient of 500/s and a temperature of 25Â° C.), (2) a water phase, (3) at least one type of microfine particles which a) have an average particle size of less than 200 nm, which b) display both bydrophilic and lipophilic properties, (amphiphilic character), and are dispersible both in water and in oil and which are 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; (4) at most 0.5% by weight of one or more emulsifiers.