Leave-on hair care composition
OwnerStuart Pratley, Aart Van Vuureinventors
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Abstract
A leave on hair care composition comprising an oil in water emulsion wherein the oil phase comprises: (i) one or more non-volatile oils, where the dynamic viscosity of any single non-volatile oil or the dynamic viscosity of a blend of non-volatile oils is less than 1000 mPa.s at 25° C. and 5 s−1; (ii) an oil dispersible structurant such that the dynamic viscosity of the structured oil phase at 25° C. prior to formation of the emulsion is at least 50,000 mPa.s at a shear rate of 0.5 s−1 and is less than 6,000 mPa.s at a shear rate of 500 s−1.
Claims18
A leave on hair care composition comprising an oil in water emulsion wherein the oil phase comprises:
- i) one or more non-volatile oils, where the dynamic viscosity of any single non-volatile oil or the dynamic viscosity of a blend of non-volatile oils is less than 1000 mpa.s at 25° C. and 5 s−1;
- ii) an oil dispersible structurant such that the dynamic viscosity of the oil phase at 25° C. prior to formation of the emulsion is at least 50,000 mPa.s at a shear rate of 0.5 s−1 and is less than 6,000 mPa.s at a shear rate of 500 s−1.
A hair care composition according to any preceding claim in which the oil phase prior to formation of the emulsion when sheared to a point past its yield point has a recovery ratio of at least 5%.
A hair care composition according to any preceding claim wherein the residue of the composition after application on hair, when part of the composition evaporates or absorbs into the hair, has rheological properties at 25° C. which are within a factor of 2 of the rheological properties of the oil phase prior to formation of the emulsion.
A hair care composition according to any preceding claim in which the oil phase is a liquid.
A hair care composition according to any preceding claim in which the non-volatile oil is selected from the group consisting of triheptanoin, tricaprylin, tricaprin, triundecanoin, trilinolein, triolein, almond oil, coconut oil, olive oil, palm kernel oil, peanut oil, sunflower oil, isopropylmyristate, isopropylpalmitate, isocetyl stearate, ethyl oleate, octyl isostearate, butyl myristate, butyl stearate, octyl palmitate, ethylhexyl cocoate, octyl dodecanol, oleyl alcohol, isostearyl alcohol, isostearic acid, mineral oil, paraffin oil, dicaprylate/dicaprate propylene glycol, C12-15 alkyl benzoate or mixtures thereof.
A hair care composition according to any preceding claim in which the oil structurant is selected from the group consisting of dextrin palmitate, trihydroxystearin, hydroxy stearic acid, hydrophilic hydrophobic silica, hydrophobically modified clay or mixtures thereof.
A hair care composition according to any preceding claim in which the emulsion further comprises a nonionic surfactant.
A hair care composition according to any preceding claim in which the level i) dispersible structurant ii) within the oil phase is from 0.5 to 20 wt % of the total oil content in the formulation.
A hair care composition according to any preceding claim which comprises an aqueous phase structured with an aqueous phase thickener.
A hair care composition according to any preceding claim further comprising a styling polymer.
A method of treating hair with a hair care composition comprising an oil-in-water emulsion containing a structured oil phase such that after application part of the composition evaporates or absorbs into the hair to leave a residue on the hair, where the residue has a dynamic viscosity at 25° C. of at least 50,000 mPa.s at a shear rate of 0.5 s−1, and less than 6,000 mpa.s at a shear rate of 500 s−1.
Dependencies are inferred from the claim text.