Patent ID: 6645511
Filing Date: 2003-11-11
Classification: A61K,A61Q,Y10S

Abstract:
A wet-skin treatment rinse-off composition comprising:a) On aqueous phase comprising water and a dispersion stabilizer, wherein said dispersion stabilizer is selected from the group consisting of inorganic dispersion stabilizers, polymeric dispersion stabilizers, organic dispersion stabilizers having a molecular weight lower than about 1000 Daltons and capable of forming a network in the aqueous phase that immobilizes a dispersed structured oil phase, and mixtures thereof; and; b) a structured oil phase comprising: i) a skin compatible oil, ii) a structurant that forms a stable network comprising particles having an average size below about 25 microns which particles are present in said liquid skin compatible oil at a temperature below 35Â° C. in an amount sufficient to have a viscosity of 100 to 500 poise measured at 1 secâˆ’1 at 25Â° C. and wherein said structurant is selected from the group consisting of organic structurants having MW less than 5000 Daltons, inorganic structurants or mixture of said organic and inorganic structurants that is capable of forming a 3-dimensional network to build up the viscosity of said skin compatible oil; iii) 0.01-45% of dispersed phase based on total structured oil phase; wherein said oil phase is dispersed in said aqueous phase to form an oil-in-water emulsion having a weight average oil droplet size of 5 to 1000 microns; wherein said structured oil phase is retained on the skin as measured by a skin retention efficiency index of at least 0.15 as determined in the in-vitro skin retention test; wherein said oil-in-water emulsion has an irritation potential measured below 0.3 on the zein solubility scale using a zein solubility test; and wherein said emulsion has a foam volume below 5 cc measured using a solution shake test.