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US 7,842,301 B2Granted
Process for making wet-skin treatment compositions
AssigneeUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsMichael Paul Aronson, Liang Sheng Tsaur
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Abstract
The invention provides process for making 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.
Claims13
Process for making a wet-skin treatment composition comprising the steps of:
- i) forming an aqueous phase comprising less than 1% anionic surfactant, water and dispersion stabilizer, wherein said dispersion stabilizer is selected from inorganic dispersion stabilizers selected from clays, silicas and mixtures thereof;
- organic 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 wherein said organic stabilizer is selected from the group consisting glycol mono-, di- and triesters having 14 to 22 atoms carbon alone and mixtures thereof;
- and polymeric stabilizers selected from carbohydrate gums, acrylate-containing homo and co-polymers and mixtures thereof,
- ii) forming a structured oil phase comprising a liquid oil selected from triglycerides, modified triglycerides, or their mixtures and a structurant present in an amount to yield viscosity of 100 to 5000 poise measured at 1 sec−1 at 25° C. and which structurant forms a stable 3-dimensional network comprising finely divided solid particles having a particle size below about 25 microns, wherein said particles are present in said liquid oil at a temperature below 35° C.;
- wherein said structurant is trihydroxystearin;
- iii) directly mixing said structured oil phase and said aqueous phase to form a structured oil-in-water predispersion having weight average droplet size of greater than about 100 microns;
- iv) passing said structured oil-in-water predispersion through a screen having an opening of up to about 2000 micrometers to make the wet skin treatment composition having oil drops of about 20 to 300 microns in size;
- wherein the wet-skin composition formed has foaming volume of less than 5 cc when measured by the Solution Shake Test.
5 more elements
Dependencies are inferred from the claim text.