Patent ID: 7214717

Claim:
A fractionatable stable double emulsion, having a polydispersity greater than 30%, of the water-in-oil-in-water type, consisting of 50 to 95% by weight, with respect to the total weight of the double emulsion, of droplets of a monodisperse inverse emulsion Ei dispersed in a continuous aqueous phase; the monodisperse inverse emulsion Ei having a polydispersity of up to and including 30%; the continuous aqueous phase comprising an alginate thickening agent at 1 to 10% by weight with respect to the total weight of the continuous aqueous phase; a water-soluble sequenced copolymer of ethylene oxide and propylene oxide as surfactant; and an osmotic pressure balancing agent; the emulsion Ei having a viscosity up to and including the viscosity of the continuous aqueous phase and consisting of 50 to 95% by weight, with respect to the total weight of Ei, of droplets of an internal aqueous phase dispersed in an oily phase; the internal aqueous phase comprising at least one hydrophilic active substance; the oily phase comprising polyglycerol polyricinoleate as surfactant; the concentration of balancing agent being sufficient to ensure osmotic balance between the aqueous phase of the emulsion Ei and the continuous aqueous phase.