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US 2003/0190296 A1Published application
Wet-skin treatment compositions
AssigneesUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsMichael Paul Aronson, Liang Sheng Tsaur
Life of this patent
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Abstract
The invention provides wet skin treatment compositions for use during bathing. The compositions are activated by water and retained efficiently on skin. The compositions impart desirable benefits to skin, are perceived to absorb quickly on wet skin, and leave the skin feeling clean, but non-greasy.
Claims20
A wet-skin treatment composition comprising:
- a) an aqueous phase comprising water and a dispersion stabilizer;
- b) a structured oil phase comprising:
- i) a skin compatible oil,
- ii) a structurant that forms a stable network of finely divided solids in said liquid skin compatible oil at a temperature below 35° C. and wherein said structurant is present in an amount sufficient to cause said oil phase to have a viscosity of 100 to 5000 poise measured at 1 sec-1 at 25° C.;
- 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 droplet size of 10 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 a low irritation potential as measured by zein solubility below 0.3 as measured by the zein solubility test;
- and
- wherein said emulsion is low foaming as measured by a foam volume below 5 cc as measured in the solution shake test.
7 more elements
A process for moisturizing and protecting skin comprising the steps of:
- (A) washing and/or rinsing the skin to wet and remove dirt and debris;
- (B) thereafter applying to wet skin an effective amount of a water-activated wet skin treatment composition comprising:
- (i) an aqueous phase comprising water and dispersion stabilizer;
- (ii) a structured oil phase comprising:
- a) a skin compatible oil;
- b) a structurant that forms a stable network of finely divided solids in said liquid skin compatible oil at a temperature below 35° C. and wherein said structurant is present in an amount sufficient to cause said oil phase to have a viscosity of 100 to 5000 poise measured at 1 sec−1 at 25° C.;
- and
- c) 0.1 to 45% of dispersed phase based on structured oil phase,
- wherein said oil phase is dispersed in said aqueous phase to form an oil-in-water emulsion having a weight average droplet size of 10 to 1000 microns;
- wherein said structured oil phase is retained in kin as measured by a skin retention efficiency index of at least 0.15 as determined in the in-vitro skin retention test, and;
- wherein said oil-in-water emulsion has a low irritation potential as measured by a zein solubility below 0.3 as measured by the zein solubility test;
- and
- wherein said emulsion has low foaming as measured by a foam volume below 5 cc as measured in the solution shake test;
- C) optionally removing excess water-activated treatment composition by further rinsing the skin;
- and
- D) drying the skin.
13 more elements
Dependencies are inferred from the claim text.