POLYDISPERSE DOUBLE EMULSION, CORRESPONDING MONODISPERSE DOUBLE EMULSION AND METHOD FOR PREPARING THE MONODISPERSE EMULSION

摘要

The invention concerns a fractionable polydisperse stable double oil-in-water emulsion, consisting of 50 to 95 wt.%, relative to the total weight of the double emulsion, droplets of an invert monodisperse emulsion Ei dispersed in a continuous aqueous phase; the continuous aqueous phase comprising a polysaccharide thickening agent in a proportion of 1 to 10 wt.% relative to the total weight of the continuous aqueous phase; a water-soluble ethylene oxide and propylene oxide block copolymer as surfactant; and an osmotic pressure balancing agent; the emulsion Ei having a viscosity not higher than the viscosity of the continuous aqueous phase and consisting of 50 to 95 wt.%, relative to the total weight of Ei, droplets of an internal aqueous phase dispersed in an oily phase; the internal aqueous phase comprising at least an active hydrophilic substance; the oily phase comprising polyglycerol polyricinoleate as surfactant. The invention further concerns the corresponding monodisperse double emulsion of the same formulation and the method for preparing it starting from the claimed polydisperse double emulsion.