BODY CARE COMPOUNDS

Description

BACKGROUND

[0001] In recent years, foaming emulsions, particularly for shower gel products, facial washes and shampoos have become increasingly popular in various areas of the world. These compositions can provide skin or hair cleansing and caring in one application. In order for such compositions to be effective, one should have a physically stable composition with high foaming characteristics but which remains mild to the skin and provide an appropriate skin feel and conditioning effect during and after use. To meet the various demands and requirements for such compositions, many of the available products include one or more thickening agents to achieve the desired viscosities.

[0002] Thickening of surfactant solutions is typically achieved with sodium chloride or known thickening agents that provide the singular thickening benefit. Due to many factors such as cost and the desire for more simple formulations, it is advantageous to utilize multi-functional ingredients that can provide multiple benefits. Personal care compositions comprising glyceryl oleate are described in US 2013 / 253057 A1, US 2015 / 315123 A1, US 2014 / 349902 A1, WO 2007 / 127987 A2, EP 1 932 512 A1, US 2014 / 023606 A1 and EP 1 250 906 A2.BRIEF SUMMARY

[0003] The present disclosure provides personal care compositions as defined in the claims, including shampoos, shower gels and face washes, that comprise a viscosity adjusting system that includes glyceryl oleate and at least one additional thickening agent. The at least one additional thickening agent includes Glucamate LT.

[0004] It has been discovered that glyceryl oleate, which is a known emollient and emulsifier, can also act as a thickening or viscosity adjusting agent, and enhance the thickening effects of other thickening agents, for example and not limitation inorganic salts and modified sugar thickeners. The use of glyceryl oleate as a thickening agent, in particular in combination with another thickening agent, can achieve viscosity levels that would otherwise not be possible by either agent alone, or be predicted by their individual contribution to the viscosity increase. Thus, the addition of glyceryl oleate as a thickener allows for higher maximum viscosity levels while at the same time providing an emolliency to the formulation.DETAILED DESCRIPTION

[0005] Unless otherwise specified, all percentages and amounts expressed herein and elsewhere in the specification should be understood to refer to percentages by weight. The weight percentages as expressed herein are understood to refer to the percentage by weight of active components based on the total weight of a personal care composition as described herein. For example, for if 11.7 wt % of a 70% surfactant solution is employed in a given formulation as described herein, the % surfactant would be 8.19 wt % of the composition (i.e., the % of the active).

[0006] The term "about," when used in reference to a range of values, should be understood to refer to either value in the range, or to both values in the range. As used throughout, ranges are used as shorthand for describing each and every value that is within the range. Any value within the range can be selected as the terminus of the range.

[0007] The present disclosure provides personal care compositions as defined in the claims comprising a viscosity adjusting system that comprises glyceryl oleate and at least one additional viscosity adjusting agent, wherein the at least one additional viscosity adjusting agent includes Glucamate LT. Preferably, the composition comprises water as a carrier. The compositions further comprises a surfactant system having an anionic surfactant and a zwitterionic surfactant, and optionally a nonionic surfactant. The composition further comprises a preservative, a pH modifier, and optionally a moisturizer or a skin conditioner, or both a moisturizer and a skin conditioner.

[0008] Specifically, the present disclosure provides personal care composition (Composition 1) comprises: a surfactant system consisting of: an anionic surfactant; a zwitterionic or amphoteric surfactant; and optionally a non-ionic surfactant; a preservative system; a pH modifier; optionally a moisturizer or a skin conditioner or both a moisturizer and a skin conditioner; and a viscosity adjusting system, wherein the viscosity adjusting system comprises glyceryl oleate and at least one additional viscosity adjusting agent, wherein the at least one additional viscosity adjusting agent includes Glucamate LT.

[0009] The present disclosure provides additional exemplary embodiments, including: 1.1 Composition 1, wherein the viscosity adjusting system consists essentially of glyceryl oleate and the at least one additional viscosity adjusting agent. The at least one additional viscosity adjusting agent includes Glucamate ™< LT. Further viscosity adjusting agents may be selected from lipid thickeners such as cetyl alcohol, stearyl alcohol, isopropyl palmitate, isopropyl myristate, a polymer, carnauba wax, and stearic acid; natural thickeners such as hydroxyethylcellulose, guar gum, locust bean gum, xanthan gum, and gelatin; mineral thickeners such as silica, bentonite, and magnesium aluminum silicate; and synthetic thickeners such as carbomer thickeners; and inorganic salts and other electrolytes such as sodium chloride and other mono-, di- and trivalent salts, and a hydrotrope. 1.2 Composition 1 or 1.1-1.2, wherein the viscosity adjusting system consists essentially of glyceryl oleate and Glucamate ™< LT. 1.3 Composition 1 or 1.1-1.2, wherein the viscosity adjusting system consists essentially of glyceryl oleate and Glucamate ™< LT; wherein the glyceryl oleate is present in an amount of from 0.2-0.8% by weight of the composition; and the Glucamate ™< LT is present in an amount of from 0.1-2.5% by weight of the composition. 1.4 Composition 1 or 1.1-1.3, wherein the surfactant system consists essentially of an anionic surfactant and an amphoteric surfactant, and is free of other surfactants. 1.5 Composition 1 or 1.1-1.4, wherein the weight ratio of anionic surfactant to amphoteric surfactant is from 1:1 to 4:1, 1.5:1 to 3.5:1, 2:1 to 3:1, or 2.5:1 by weight, based on the active weight of the surfactant. 1.6 Composition 1 or 1.1-1.5, wherein the anionic surfactant is an alkyl ether sulfate, for example a linear C 8 -C 18 alkyl ether sulfate, for example selected from sodium laureth sulfate, sodium lauryl sulfate, and ammonium lauryl sulfate, for example sodium laureth sulfate. 1.7 Composition 1 or 1.1-1.6, wherein the amphoteric surfactant is a N,N-disubstituted glycine derivative; for example a N-(2-aminoethyl)-N-(2-hydroxyethyl) glycine derivative; for example a cocoamphoacetate salt, for example sodium cocoamphoacetate. 1.8 Composition 1 or 1.1-1.7, wherein the surfactant system comprises 5 wt % to 15 wt %, 7 wt % to 13 wt %, 8 wt % to 12 wt %, 9-11 wt %, or 10-11 wt %, or 10 wt % of the composition, or 11 wt % of the composition. 1.9 Composition 1 or 1.1-1.8, wherein the pH modifier is selected from lactic acid, sodium lactate, citric acid, hydrochloric acid, glycolic acid, sodium hydroxide, potassium chloride, monosodium citrate, disodium citrate, monosodium malate, sodium carbonate, bicarbonates, sesquicarbonates, borates, silicates, monosodium phosphate, trisodium phosphate, pyrophosphate salts, imidazole, and a combination of two or more thereof. 1.10 Composition 1 or 1.1-1.9, wherein the preservative system comprises one or more preservatives selected from sodium benzoate, sodium salicylate, benzalkonium chloride, benzethonium chloride, 5-bromo-5-nitro-1,3-dioxane, 2-bromo-2-nitropropane-1,3-diol, alkyl trimethyl ammonium bromide, N-(hydroxymethyl)-N-(1,3-dihydroxy methyl-2,5-dioxo-4-imidaxolidinyl-N-(hydroxy methyl)urea, 1-3-dimethyol-5,5-dimethyl hydantoin, iodopropynyl butyl carbamate, butyl paraben, ethyl paraben, methyl paraben, propyl paraben, methyl isothiazolinone, methyl-chloroisothiazoline, phenoxyethanol, tris-hydroxyethyl-hexahydrotriazine, methylisothiazolinone, 5-chloro-2-methyl-4-isothiazolin-3-one, 1,2-dibromo-2,4-dicyanobutane, 1-(3-chloroalkyl)-3,5,7-triaza-azoniaadamantane chloride, organic acids, or combinations thereof. 1.11 Composition 1 or 1.1-1.10, wherein the preservative system comprises at least two preservatives. 1.12 Composition 1 or 1.1-1.11, wherein the preservative system comprises phenoxyethanol and sodium benzoate in a weight ratio of from 0.8:1 to 1.2:1. 1.13 Composition 1 or 1.1-1.12, wherein the composition comprises a moisturizer and a conditioner. 1.14 Composition 1.13, wherein the moisturizer and conditioner are selected from long chain fatty acids; liquid water-soluble polyols; glycerin; propylene glycol; sorbitol; polyethylene glycol; ethoxylated / propoxylated ethers of methyl glucose (eg., methyl gluceth-20) and ethoxylated / -propoxylated ethers of lanolin alcohol (e.g., Solulan-75); coco and tallow fatty acids; nonoclusive liquid water soluble polyols; essential amino acids; sodium pyrrolidone carboxylic acid (or sodium dl-pyrrolidone carboxylate); urea; L-proline; guanidine; pyrrolidone; hexadecyl, myristyl, isodecyl or isopropyl esters of adipic, lactic, oleic, stearic, isostearic, myristic or linoleic acids and corresponding alcohol esters such as sodium isostearoyl-2 lactylate, sodium capryl lactylate; aloe vera gel and acetamide MEA; and film forming and conditioning polymers such as polyquaternium polymers; for example Polyquaternium 7 and Polyquaternium 10. 1.15 Composition 1 or 1.1-1.14, wherein the personal care composition is a shampoo composition. 1.16 Composition 1.15, further comprising an anti-dandruff active; for example selected from piroctone olamine, zinc omadine, climbazole, pyridinethione salts, azoles, selenium sulfide, particulate sulfur, keratolytic agents, and mixtures thereof. 1.17 Composition 1.15 or 1.16, further comprising one or more optional ingredients selected from fragrances, vitamins, extracts, proteins, antioxidants, pearlizers, opacifiers and a combination of two or more thereof. 1.18 Any of Compositions 1.15-1.17, comprising added water in an amount of from 65% to 75% by weight of the composition, for example from 68% to 72% by weight of the composition. 1.19 Any of Compositions 1 or 1.1-1.18, wherein the pH of the composition is from 4-5, for example, from 4.2-4.8.

[0010] The present disclosure provides additional exemplary embodiments, including: 3.1 Composition 3, wherein the viscosity adjusting system consists of glyceryl oleate, sodium chloride and Glucamate ™< LT. 3.2 Composition 3.1, wherein: the glyceryl oleate is present in an amount of from 0.1-0.8% by weight of the composition, for example from 0.1-0.4% by weight of the composition, for example from 0.2-0.3% by weight of the composition; the sodium chloride is present in an amount of from 0.1-1.25% by weight of the composition, for example from 0.3-0.8% by weight of the composition, for example from 0.7-0.8% by weight of the composition, or from 0.3-0.45% by weight of the composition; and the Glucamate ™< LT is present in an amount of from 0.1-0.8%, for example from 0.2-0.6%, for example 0.3-0.5%, for example 0.4% by weight of the composition. 3.3 Composition 3.2, wherein: the glyceryl oleate is present in an amount of from 0.2-0.3% by weight of the composition; the sodium chloride is present in an amount of from 0.7-0.8% by weight of the composition, or from 0.3-0.45% by weight of the composition; and the Glucamate ™< LT is present in an amount of from 0.1-0.8%, for example from 0.3-0.5% by weight of the composition. 3.4 Composition 3 or 3.1-3.3, wherein the surfactant system consists essentially of an anionic surfactant, a zwitterionic surfactant, and a nonionic surfactant. 3.5 Composition 3.4, wherein the weight ratio of anionic surfactant to zwitterionic surfactant to non-ionic surfactant is from (4.5-7):(1-3):(0.8-1.2); for example (5.5-6.5):(1-2):(0.9-1.1); for example (5.6-6):(1.4-1.9):(1) by weight, based on the active weight of the surfactant. 3.6 Composition 3 or 3.1-3.5, wherein the anionic surfactant is an alkyl ether sulfate, for example a linear C 8 -C 18 alkyl ether sulfate, for example selected from sodium laureth sulfate, sodium lauryl sulfate, and ammonium lauryl sulfate, for example sodium laureth sulfate. 3.7 Composition 3 or 3.1-3.6, wherein the zwitterionic surfactant is a quaternary ammonium carboxylate betaine; for example cocoamidopropyl betaine. 3.8 Composition 3 or 3.1-3.7, wherein the non-ionic surfactant is selected from ethoxylated aliphatic alcohols, alkyl glucosides such as coco glucoside, polyoxyethylene surfactants, carboxylic esters, polyethylene glycol esters, anhydrosorbitol ester and it's ethoxylated derivatives, glycol esters of fatty acids, carboxylic amides, monoalkanolamine condensates and polyoxyethylene fatty acid amides; for example coco-glucoside. 3.9 Composition 3 or 3.1-3.8, wherein the surfactant system comprises 5 wt % to 15 wt %, 7 wt % to 13 wt %, 8 wt % to 12 wt %, 9-11 wt %, or 10-11 wt %, or 10 wt % of the composition, or 11 wt % of the composition. 3.10 Composition 3 or 3.1-3.9, wherein the pH modifier is selected from lactic acid, sodium lactate, citric acid, hydrochloric acid, glycolic acid, sodium hydroxide, potassium chloride, monosodium citrate, disodium citrate, monosodium malate, sodium carbonate, bicarbonates, sesquicarbonates, borates, silicates, monosodium phosphate, trisodium phosphate, pyrophosphate salts, imidazole, and a combination of two or more thereof; for example lactic acid and sodium lactate. 3.11 Composition 3 or 3.1-3.10, wherein the preservative system comprises one or more preservatives selected from sodium benzoate, sodium salicylate, benzalkonium chloride, benzethonium chloride, 5-bromo-5-nitro-1,3-dioxane, 2-bromo-2-nitropropane-1,3-diol, alkyl trimethyl ammonium bromide, N-(hydroxymethyl)-N-(1,3-dihydroxy methyl-2,5-dioxo-4-imidaxolidinyl-N-(hydroxy methyl)urea, 1-3-dimethyol-5,5-dimethyl hydantoin, iodopropynyl butyl carbamate, butyl paraben, ethyl paraben, methyl paraben, propyl paraben, methyl isothiazolinone, methyl-chloroisothiazoline, phenoxyethanol, tris-hydroxyethyl-hexahydrotriazine, methylisothiazolinone, 5-chloro-2-methyl-4-isothiazolin-3-one, 1,2-dibromo-2,4-dicyanobutane, 1-(3-chloroalkyl)-3,5,7-triaza-azoniaadamantane chloride, organic acids, or combinations thereof. 3.12 Composition 3 or 3.1-3.11, wherein the preservative system comprises at least two preservatives. 3.13 Composition 3 or 3.1-3.12, wherein the preservative system comprises sodium benzoate and sodium salicylate in a weight ratio of from 1:1 to 2:1, for example from 1:1 to 1.5:1; for example from 1.3:1 to 1.4:1. 3.14 Composition 3 or 3.1-3.13, wherein the personal care composition is a face wash composition. 3.15 Composition 3.14, further comprising a zinc salt skin flora regulator active; for example selected from zinc sulfate, zinc oxide, or zinc lactate, preferably zinc sulfate, and mixtures thereof. 3.16 Composition 3 or 3.1-3.15, further comprising a humectant selected from glycerin, lactic acid, propylene glycol, sodium PCA, sorbitol, and mixtures thereof, preferably glycerin and / or lactic acid; for example in an amount of from 1-10% by weight of the composition, for example from 5-10%, for example from 6%-8% by weight of the composition, or for example from 1-3% by weight of the composition. 3.17 Composition 3 or 3.1-3.16, further comprising a conditioner. 3.18 Composition 3.17, wherein the conditioner is selected from long chain fatty acids; liquid water-soluble polyols; glycerin; propylene glycol; sorbitol; polyethylene glycol; ethoxylated / propoxylated ethers of methyl glucose (eg., methyl gluceth-20) and ethoxylated / - propoxylated ethers of lanolin alcohol (e.g., Solulan-75); coco and tallow fatty acids; nonoclusive liquid water soluble polyols; essential amino acids; sodium pyrrolidone carboxylic acid (or sodium dl-pyrrolidone carboxylate); urea; L-proline; guanidine; pyrrolidone; hexadecyl, myristyl, isodecyl or isopropyl esters of adipic, lactic, oleic, stearic, isostearic, myristic or linoleic acids and corresponding alcohol esters such as sodium isostearoyl-2 lactylate, sodium capryl lactylate; aloe vera gel and acetamide MEA; and film forming and conditioning polymers such as polyquaternium polymers; for example Polyquaternium 7 and Polyquaternium 10, for example Polyquaternium 7. 3.19 Composition 3 or 3.1-3.18, further comprising caprylyl glycol; for example in an amount of from 0.01-0.25%, for example 0.05-0.15%, for example 0.1% by weight of the shower gel composition. 3.20 Composition 3 or 3.1-3.19, further comprising one or more optional ingredients selected from fragrances, vitamins, extracts, proteins, antioxidants, pearlizers, opacifiers and a combination of two or more thereof. 3.21 Composition 3 or 3.1-3.20, comprising added water in an amount of from 65% to 75% by weight of the composition, for example from 68% to 72% by weight of the composition.

[0011] In a further exemplary embodiment, the invention includes a method (Method 1) of cleansing hair comprising the steps of providing a shampoo composition as described above (e.g., any of Composition 1 or 1.1-1.19); and applying the composition to the hair to provide a cleansing effect

[0012] A personal care cleansing composition as described above (e.g., any of Composition 3, or 3.1-3.21) can be used in a method (Method 2) of cleansing skin comprising the steps of providing such a personal care cleansing composition; and applying the composition to the skin to provide a cleansing effect.

[0013] A method (Method 3) for preparing a personal care cleansing composition can comprise combining an effective amount of a preservative, a pH modifier, and a viscosity adjusting system comprising glyceryl oleate and at least one additional viscosity adjusting agent, with a surfactant system comprising an anionic surfactant and a zwitterionic surfactant.

[0014] A method (Method 4) of increasing viscosity of a shampoo composition can comprise combining a shampoo formulation comprising one or more surfactants, a preservative, a pH modifier and a moisturizer, with a viscosity adjusting system comprising glyceryl oleate and at least one additional viscosity adjusting agent.

[0015] A method (Method 5) of increasing viscosity of a shower gel composition can comprise combining a shower gel formulation comprising one or more surfactants, a preservative, a pH modifier and optionally a moisturizer, with a viscosity adjusting system comprising glyceryl oleate and at least one additional viscosity adjusting agent.

[0016] A method (Method 6) of increasing viscosity of a face wash composition can comprise combining a face wash formulation comprising one or more surfactants, a preservative, a pH modifier and optionally a conditioner, with a viscosity adjusting system comprising glyceryl oleate and at least one additional viscosity adjusting agent.

[0017] In preferred embodiments, the personal care compositions are shampoos, shower gels, or face washes.

[0018] The personal care compositions of the present disclosure also include a surfactant system that is preferably comprised of an anionic surfactant and, for the shampoo compositions of the present disclosure (i.e., Compositions 1 or 1.1-1.19), an amphoteric surfactant. The surfactant systems of the face washes (i.e., Compositions 3 or 3.1-1.21) of the present disclosure are preferably comprised of an anionic surfactant, a zwitterionic surfactant, and a nonionic surfactant.

[0019] In some embodiments of the shampoo, shower gel and face wash compositions of the disclosure, the surfactant system comprises 5 wt % to 15 wt %, 7 wt % to 13 wt %, 8 wt % to 12 wt %, 9-11 wt %, or 10-11 wt %, or 10 wt % of the composition, or 11 wt % of the composition.

[0020] Suitable anionic surfactants for both the personal care and shampoo compositions of the present disclosure include, but are not limited to, those surface-active or detergent compounds that contain an organic hydrophobic group containing generally 8 to 26 carbon atoms or generally 10 to 18 carbon atoms in their molecular structure and at least one water-solubilizing group selected from sulfonate, sulfate, and carboxylate so as to form a water-soluble detergent. Usually, the hydrophobic group will comprise a C 8 -C 22 alkyl, or acyl group. Such surfactants are employed in the form of water-soluble salts and the salt-forming cation usually is selected from sodium, potassium, ammonium, magnesium and mono-, di- or tri-C 2 -C 3 alkanolammonium, with the sodium, magnesium and ammonium cations again being the usual ones chosen.

[0021] Some examples of suitable anionic surfactants include, but are not limited to alkyl ether sulfates, for example linear C 8 -C 18 alkyl ether sulfates, and salts thereof, preferably the sodium, potassium, ammonium, and ethanolammonium salts thereof.

[0022] Suitable anionic ether sulfates have the formula R(OC 2 H 4 ) n OSO 3 M wherein n is 1 to 12, or 1 to 5, and R is an alkyl, alkylaryl, acyl, or alkenyl group having 8 to 18 carbon atoms, for example, an alkyl group of C 12 -C 14 or C 12 -C 16 , and M is a solubilizing cation selected from sodium, potassium, ammonium, magnesium and mono-, di- and triethanol ammonium ions. Exemplary alkyl ether sulfates contain 12 to 15 carbon atoms in the alkyl groups thereof, e.g., sodium laureth (2 EO) sulfate. Some preferred exemplary anionic surfactants that may be used in the compositions of the present disclosure include sodium laurel ether sulfate (sodium laureth sulfate; SLES), sodium lauryl sulfate, and ammonium lauryl sulfate.

[0023] Preferably, the present personal care compositions comprise a single anionic surfactant. In some embodiments, the anionic surfactant is present in an amount of 0.01 wt % to 20 wt %, 0.1 wt % to 10 wt %, 3 wt % to 10 wt %, 5 wt % to 10 wt %, 6 wt % to 10 wt %, 7 wt % to 9 wt %, or 7 wt %, 8 wt %, or 9 wt % of the composition.

[0024] In some embodiments, the personal care compositions of the present disclosure include a zwitterionic surfactant. Suitable zwitterionic surfactants include betaines and sultaines. In some embodiments, the zwitterionic surfactant comprises a betaine having a quaternary ammonium or phosphonium ion as the cationic group and a carboxylate group as the anionic group; for comprises a betaine having a quaternary ammonium ion as the cationic group and a carboxylate group as the anionic group (i.e., a quaternary ammonium carboxylate betaine). Typical alkyldimethyl betaines include, but are not limited to, decyl dimethyl betaine or 2-(N-decyl-N, N-dimethylammonia)acetate, coco dimethyl betaine or 2-(N-coco N, N-dimethylammonia)acetate, myristyl dimethyl betaine, palmityl dimethyl betaine, lauryl dimethyl betaine, cetyl dimethyl betaine, and stearyl dimethyl betaine. The amidobetaines similarly include, but are not limited to, cocoamidoethylbetaine, and cocoamidopropyl betaine. In one embodiment, the betaine is coco (C 8 -C 18 ) amidopropyl dimethyl betaine. Two examples of betaine surfactants that can be used are EMPIGEN ™< BS / CA from Huntsman, and Tegobetaine F50 from BASF. One preferred zwitterionic surfactant is cocamidopropyl betaine. Other suitable zwitterionic surfactants include amine oxides.

[0025] In some embodiments, the shower gel and face wash compositions of the present disclosure preferably comprise a single zwitterionic surfactant. In some embodiments, the zwitterionic surfactant is present in an amount of 0.01 wt % to 10 wt %, 0.5 wt % to 5 wt %, 1 wt % to 3 wt %, 1 wt % to 2 wt %, or 2 wt % to 3 wt %, by weight of the composition.

[0026] In some embodiments, the shampoo compositions of the present disclosure include an amphoteric surfactant. As used herein, the term amphoteric surfactant is intended to mean a zwitterionic surfactant other than a quaternary ammonium surfactant. Suitable amphoteric surfactants include amine carboxylates, for example tertiary amine carboxylates, including N,N-disubstituted glycine derivatives, for example N-(2-aminoethyl)-N-(2-hydroxyethyl) glycine derivatives such as cocoamphoacetate salts, for example sodium cocoamphoacetate.

[0027] The shampoo compositions of the present disclosure preferably comprise a single amphoteric surfactant. In some embodiments, the amphoteric surfactant is present in an amount of 0.5 wt % to 5 wt %, 1 wt % to 4 wt %, 2 wt % to 3 wt %, or 2.5 wt % to 3 wt % of the composition.

[0028] In some embodiments of the shampoo compositions of the present disclosure, the surfactant system comprises an anionic surfactant and an amphoteric surfactant in a weight ratio of anionic surfactant to amphoteric surfactant of from 1:1 to 4:1, 1.5:1 to 3.5:1, 2:1 to 3:1, or 2.5:1 by weight, based on the active weight of the surfactant.

[0029] The shampoo compositions of the present disclosure include a thickening system that includes glyceryl oleate. Glyceryl oleate (CAS Reg. No. 25496-72-4; glyceryl monooleate) is a known emollient and emulsifier. However, it has been discovered in accordance with the present disclosure that glyceryl oleate is also a viscosity adjusting (thickening) agent, and acts synergistically with other thickeners to afford viscosities that would otherwise not be possible. Thus, the thickening system includes glyceryl oleate and an additional viscosity adjusting agent. The additional viscosity adjusting agent includes Glucamate LT. Further viscosity adjusting or thickening agents known to be useful in shampoo formulations can be used. Although these thickening agents can include inorganic salts such a sodium chloride, which are routinely used to enhance viscosities in personal care compositions, the use of such inorganic salts is disadvantageous in that the salt imparts corrosive properties to the formulation, making their contact with metals, such as metal springs, problematic. One benefit afforded by the use of glyceryl oleate in accordance with the present disclosure is that high viscosities are achieved using glyceryl oleate and a viscosity adjusting agent including Glucamate LT (that is not an inorganic salt). If an inorganic salt such as sodium chloride is used, significantly less salt is required to achieve high viscosities, resulting in less corrosive formulations. Suitable viscosity adjusting (or thickening) agents for use in the thickening systems disclosed herein with glyceryl oleate include lipid thickeners such as cetyl alcohol, stearyl alcohol, carnauba wax, and stearic acid; natural thickeners such as hydroxyethylcellulose, guar gum, locust bean gum, xanthan gum, and gelatin; mineral thickeners such as silica, bentonite, and magnesium aluminum silicate; and synthetic thickeners such as carbomer thickeners. The thickener system of the invention comprises, and preferably is, glyceryl oleate and Glucamate ™< LT, which is a mixture of PEG-120 methyl glucose trioleate, propylene glycol and water sold by Lubrizol Corp., Wickliffe, Ohio. In some preferred embodiments of the shampoo compositions of the present disclosure, the glyceryl oleate is present in an amount of from 0.1-1% by weight of the composition, for example from 0.2-0.8% by weight of the composition, for example from 0.3-0.7% by weight of the composition, for example 0.5% by weight of the composition; and the Glucamate ™< LT is present in an amount of from 0.1-2.5% by weight of the composition; for example 0.5-2% by weight of the composition, for example 0.75-1.5% by weight of the composition, for example 0.8-1.2% by weight of the composition, for example 1% by weight of the composition.

[0030] In some embodiments, preservatives are included in the present personal care and shampoo compositions, preferably at a concentration of 0.01 wt % to 10 wt %, 0.01 wt % to 3 wt %, or 0.01 wt % to 2.5 wt %. Examples of preservatives include, but are not limited to, benzalkonium chloride; sodium benzoate, sodium salicylate; benzethonium chloride, 5-bromo-5-nitro-1,3dioxane; 2-bromo-2-nitropropane-1,3-diol; alkyl trimethyl ammonium bromide; N-(hydroxymethyl)-N-(1,3-dihydroxy methyl-2,5-dioxo-4-imidaxolidinyl-N-(hydroxy methyl)urea; 1-3-dimethyol-5,5-dimethyl hydantoin; formaldehyde; iodopropynl butyl carbamate, butyl paraben; ethyl paraben; methyl paraben; propyl paraben, mixture of methyl isothiazolinone / methyl-chloroisothiazoline in a 1:3 wt. ratio; mixture of phenoxyethanol / butyl paraben / methyl paraben / propylparaben; 2-phenoxyethanol; tris-hydroxyethyl-hexahydrotriazine; methylisothiazolinone; 5-chloro-2-methyl-4-isothiazolin-3-one; 1,2-dibromo-2,4-dicyanobutane; 1-(3-chloroalkyl)-3,5,7-triaza-azoniaadamantane chloride; organic acids, lactic acid, or citric acid and combinations thereof.

[0031] In some preferred embodiments of the shampoo compositions of the present disclosure, the compositions contain a preservative system that includes at least two preservatives, for example phenoxyethanol and sodium benzoate in a weight ratio of from 0.8:1 to 1.2:1, for example 1:1, and preferably a combined amount of the preservatives of from 0.1 to 1.5%, for example from 0.4-1.2%, for example from 0.6-1%, for example 0.8% by weight of the composition.

[0032] In some preferred embodiments of the shower gel and face wash compositions of the present disclosure, the compositions contain a preservative system that includes at least two preservatives, for example sodium benzoate and sodium salicylate in a weight ratio of from 1:1 to 2:1, for example from 1:1 to 1.5:1; for example from 1.3:1 to 1.4:1 by weight of the composition. In some embodiments, the at least two preservatives are present in a combined amount of from 0.1 to 1.5%, for example from 0.4-1.2%, for example from 0.5-1%, for example 0.7% by weight of the composition.

[0033] pH modifying agents include acidifying agents to lower pH, basifying agents to raise pH and buffering agents to control pH within a desired range. For example, one or more compounds selected from acidifying, basifying and buffering agents can be included to provide a pH of 2 to 10, or in various illustrative embodiments 2 to 8, 3 to 9, 4 to 8, 5 to 7, 6 to 10, or 7 to 9. In preferred embodiments, the pH is between 1 to 5, 2 to 5, 4 to 5, or 4.2-4.8. Examples of pH modifying agent include HCl, phosphoric and sulfonic acids and carboxylic acids such as lactic acid and citric acid, acid salts (e.g., monosodium citrate, disodium citrate, sodium lactate, and monosodium malate), alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, carbonates such as sodium carbonate, bicarbonates, sesquicarbonates, borates, silicates, phosphates (e.g., monosodium phosphate, trisodium phosphate, and pyrophosphate salts), and imidazole. One or more pH modifying agents are optionally present in a total amount effective to maintain the composition in an acceptable pH range. Preferably, only one or two pH modifying agents are employed. In some preferred embodiments of the shampoo, shower gel and face wash compositions of the present disclosure, the pH modifier is lactic acid, sodium lactate, or a combination of both lactic acid and sodium lactate.

[0034] In certain embodiments, the personal care composition is in the form of a cleansing liquid.

[0035] In some embodiments, shampoo, shower gel and face wash compositions of the present disclosure can optionally include an emollient or moisturizer component. Illustrative examples of such emollient components include glycerine, glyceryl oleate, caprylyl glycol, triglycerides (e.g., caprylic / capric triglyceride), silicone oils (e.g., cyclomethicone), ester oils (e.g., butyl myristate, isopropyl myristate, cetyl myristate, isopropyl palmitate, isopropyl stearate, octyl stearate, isocearyl stearate), organic fatty alcohols (e.g., oleic alcohol, linolenic alcohol, linoleic alcohol, isostearyl alcohol, octyl dodecanol), long chain fatty acids, liquid water-soluble polyols, propylene glycol, sorbitol, polyethylene glycol, ethoxylated / propoxylated ethers of methyl glucose (eg., methyl gluceth-20) and ethoxylated / -propoxylated ethers of lanolin alcohol (e.g., Solulan-75), coco and tallow fatty acids, nonoclusive liquid water soluble polyols, essential amino acids, and sodium pyrrolidone carboxylic acid (or sodium dl-pyrrolidone carboxylate), urea, L-proline, guanidine and pyrrolidone; hexadecyl, myristyl, isodecyl or isopropyl esters of adipic, lactic, oleic, stearic, isostearic, myristic or linoleic acids and corresponding alcohol esters such as sodium isostearoyl-2 lactylate, sodium capryl lactylate, aloe vera gel and acetamide MEA. The shampoo compositions of the present disclosure can also include an emollient or moisturizer component in addition to the glyceryl oleate, which can be any of the foregoing emollients or moisturizers.

[0036] In some embodiments, the shampoo compositions of the present disclosure further include an anti-dandruff active. Suitable non-limiting examples of anti-dandruff actives include active substances such as piroctone olamine, zinc omadine, and climbazole, pyridinethione salts, azoles, selenium sulfide, particulate sulfur, keratolytic agents, and mixtures thereof. Such anti-dandruff actives should be physically and chemically compatible with the essential components of the composition, and should not otherwise unduly impair product stability, aesthetics or performance. When present in the composition, the anti-dandruff active is included in an amount from 0.01% to 3%, preferably from 0.1% to 2%, and more preferably from 0.3% to 0.8%, or 0.5% by weight of the composition.

[0037] In some embodiments, the shampoo compositions of the present disclosure further include a film forming and / or conditioner polymer. Suitable polymers include polyquaternium polymers, for example polyquaternium 10, for example in an amount of from 0.1-0.8%, or from 0.2%-0.6%, or 0.4% by weight of the composition.

[0038] In some embodiments, the shower gel, face wash and shampoo compositions of the present disclosure further include one or more optional ingredients selected from coloring agents, fragrances, moisturizing agents, and amino acids, vitamins, extracts, proteins, antioxidants, pearlizers, opacifiers, and a combination of two or more thereof.

[0039] Further optional ingredients can also be present in the personal care compositions described herein. Non-limiting examples of further optional ingredients include skin conditioning agents, moisturizing agents, fragrance, dyes and pigments, titanium dioxide, chelating agents such as EDTA, sunscreen active ingredients such as butyl methoxy benzoylmethane; antiaging compounds such as alpha hydroxy acids, beta hydroxy acids; antioxidants such as butylated hydroxytoluene (BHT); vitamins such as A, E, K and C; essential oils and extracts thereof such as rosewood and jojoba, free fatty acids to provide enhanced skin feel benefits such as softer or smoother feeling skin, for example free fatty acids include those derived from tallow, coconut oil, palm oil and palm kernel oil, and mixtures of any of the foregoing components.

[0040] In some embodiments, the personal care compositions optionally include fragrance in an amount of 0.01 wt % to 4 wt % by weight of the composition, preferably 0.1 wt % to 2 wt %, more preferably 0.2 wt % to 1.5 wt %.

[0041] In some embodiments, the shampoo or personal care compositions optionally include pearlizers, such as Styrene / Acrylates Copolymer or glycol distearate, in an amount of 0.01 wt % to 3 wt % by weight.

[0042] The shampoo or personal care compositions of the present disclosure preferably include water as a carrier; i.e., added water (i.e., water separately added, not including water added consequent to addition of a solution of another component), e.g., in an amount of 5-95%, 50%-95%, 60%-80%, 60%-85%, 65%-75%, 68%-72%, or 70% by weight of the composition.

[0043] The personal care compositions of the present disclosure may be prepared by any ordinary methods known in the art. For example, the composition may be prepared by mixing the anionic surfactant into a suitable aqueous carrier. The components are mixed for a period of time sufficient for complete incorporation. Once mixture is complete, the zwitterionic surfactant is added to the mixture, and the components are again mixed for a suitable period of time. Following addition of the surfactants, a preservative is added with an accompanying appropriate mixing process. A pH modifier is added to the mixture until desired pH level is achieved. A rheology modifier is added to achieve a desired viscosity, and the final mixture is mixed for an appropriate amount of time until the ingredients are homogenously dispersed.

[0044] Exemplary embodiments of the present disclosure will be illustrated by reference to the following examples, which are included to exemplify, but not to limit the scope of the present invention.EXAMPLES Example 1

[0045] Tables 1 and 2 describes generic and specific formulas of exemplary shampoo compositions according to the present disclosure containing the present glyceryl oleate viscosity adjusting system. Table 1Function Ingredient Composition A (wt %) N / AWater65-75SurfactantSodium Laureth Sulfate (70%)5-10SurfactantSodium Cocoamphoacetate (32%)1-4Pearlizer / OpacifierPearlizer / Opacifier2-6pH modifierLactic Acid (50%)0.1-2MoisturizerSodium dl-Pyrrolidone Carboxylate (50%)0.01-0.8PreservativeSodium Benzoate0.1-0.8Viscosity adjuster / emollientGlyceryl Oleate0.1-1Vitamins / Extracts / Protein / Fragrance0.5-1.5Anti-oxidantTocopheryl Acetate0.01-2.5Thickener / Viscosity Adjusting AgentGlucamate LT0.1-2.5Active (anti-dandruff)Piroctone Olamine (Octopirox)0.2-1PreservativePhenoxy Ethanol0.1-1Film Former / ConditionerPolymer JR 400 (Polyquaternium 10)0.1-1 Table 2 Function Ingredient Composition B (wt % active) N / AWater69.7SurfactantSodium Laureth Sulfate (70%)7.14SurfactantSodium Cocoamphoacetate (32%)2.88Pearlizer / OpacifierPearlizer / Opacifier4pH modifierLactic Acid (50%)1.11MoisturizerSodium dl-Pyrrolidone Carboxylate (50%)0.25PreservativeSodium Benzoate0.4Viscosity adjuster / emollientGlyceryl Oleate0.5Vitamins / Extracts / Protein / Fragrance1.067Anti-oxidantTocopheryl Acetate0.1Thickener / Viscosity Adjusting AgentGlucamate LT1.0Active (anti-dandruff)Piroctone Olamine (Octopirox)0.5PreservativePhenoxy Ethanol0.4Film Former / ConditionerPolymer JR 400 (Polyquaternium 10)0.4

[0046] The exemplary compositions described in Tables 1 and 2 above may be prepared according to conventional methods known to those skilled in the art. In particular, the exemplary composition of the present invention is prepared to ensure that the surfactant system provides the anionic and amphoteric surfactants at certain weight ratios. The sodium laureth sulfate is provided in the form of a diluted solution containing 70% by weight of sodium laureth sulfate; and the sodium cocoamphoacetate is provided in the form of a diluted solution containing 32 % by weight of sodium cocoamphoacetate; and the lactic acid is provided in the form of a diluted solution containing 50% by weight of lactic acid.

[0047] The formulation of Table 1 has a white, perarlized appearance, a pH of from 4.4-4.9, and a viscosity (Brookfield DV-II+ Viscometer, 24 hours, Sp #4, 20 RPM, 25°C) of 3,000-6,000 mPa.s (cp).

[0048] The surfactant system includes sodium laureth sulfate as the anionic surfactant and sodium cocoamphoacetate as the zwitterionic surfactant, and the thickening system includes glyceryl oleate and Glucamate ™< LT thickener, which is a mixture of PEG-120 methyl glucose trioleate; propylene glycol and water sold by Lubrizol.Example 2

[0049] Viscosities were determined for a commercial antidandruff shampoo alone; the same shampoo with 1% Glucamate ™< LT; the same shampoo with 0.5% glyceryl oleate; and the same shampoo with both 1% Glucamate ™< LT and 0.5% glyceryl oleate. The results are shown below in Table 3: Table 3Shampoo Viscosity (cp) Commercial antidandruff shampoo alone1780Commercial antidandruff shampoo with 1% Glucamate ™< LT2740Commercial antidandruff shampoo with 0.5% glyceryl oleate2780Commercial antidandruff shampoo with 1% Glucamate ™< LT and 0.5% glyceryl oleate4880

[0050] It can be seen that the combination of 1% Glucamate ™< LT and 0.5% glyceryl oleate (increase of 3100 mPa.s (cp)) provides an increase in viscosity that is greater than the sum of the increases in viscosity caused by both individually (increase of 960 mPa.s (cp) and 1000 mPa.s (cp) for 1% Glucamate ™< LT and 0.5% glyceryl oleate, respectively).

[0051] Further studies were undertaken wherein the effect of increasing weight percent of Glucamate ™< LT was determined on the viscosities of the same commercial antidandruff shampoo alone and with 0.5% glyceryl oleate. The viscosities were determined on a Brookfield DV-II+ Viscometer , at 24 hours, Sp #4, 20 RPM, 25°C. The results are shown below in Table 4: Table 4Weight % Glucamate ™< LT Commercial antidandruff shampoo alone Commercial antidandruff shampoo with 0.5% glyceryl oleate 0178027800.2210034500.4231038400.5244040800.8259043801274048801.230505460

[0052] It can be seen that over the range of 0%-1.2% Glucamate ™< LT, the viscosity of the commercial antidandruff shampoo alone increased by 1270 mPa.s (cp) whereas the viscosity of the commercial antidandruff shampoo containing 0.5% glyceryl oleate increased by 2680 mPa.s (cp). The addition of the glyceryl oleate allowed to reach viscosity levels that was not possible with Glucamate LT, a known thickener, alone.Example 3

[0053] Tables 5 and 6 describes generic and specific formulas of exemplary shower gel and face wash compositions according to the present disclosure containing the present glyceryl oleate viscosity adjusting system (Comp. E, F, I and J) and comparative compositions (Comp. C, D, G and H). Table 5Exemplary Shower Gel and Face Wash CompositionsFunction Ingredient Comp. C (Dermo Comfort Dry Shower Gel) (wt %) Comp. D (Dermo Protect Normal Face Wash) (wt %) Comp. E (Dermo Sensitive (Sensitive) Face Wash) (wt %) Comp. F (Zero % Face Wash) (wt %) N / AWater60-8060-8060-8060-80SurfactantSodium Laureth Sulfate (70%)7-96.5-8.56.5-8.56.5-9SurfactantCocamidopropyl Betaine (30%)0.5-2.51-41-40.5-2.5SurfactantCoco-Glucoside0.5-30.5-30.5-30.5-3HumectantGlycerin5-90.5-45-95-9Skin ConditionerPolyquaternium 700.001-300Opacifier / Fragrance0.1-3000EmollientCaprylyl glycol0.01-0.300.01-0.30Viscosity adjuster / emollientGlyceryl Oleate0.1-10.01-0.50.01-0.50.01-0.5Skin flora regulatorZinc sulfate (50%)0.01-0.300.01-0.30Viscosity adjusterSodium Chloride (Q.S.)0.1-10.1-10.1-10.1-1Thickener / Viscosity Adjusting AgentGlucamate LT000.1-10.1-1PreservativeSodium Benzoate powder 100%0.1-10.1-10.1-10.1-1PreservativeSodium salicylate powder 100%0.1-10.1-10.1-10.1-1pH modifierLactic Acid (50%)0.5-30.5-30.5-30.5-2pH modifierSodium lactate0.5-30.5-30.5-30.5-3 Table 6 Exemplary Shower Gel and Face Wash CompositionsFunction Ingredient Comp. G (Dermo Comfort Dry Shower Gel) (wt %) Comp. H (Dermo Protect Normal Face Wash) (wt %) Comp. I (Dermo Sensitive (Sensitive) Face Wash) (wt %) Comp. J (Zero % Face Wash) (wt %) N / AWater68.0671.867.57570.15SurfactantSodium Laureth Sulfate (70%)8.197.357.357.00SurfactantCocamidopropyl Betaine (30%)1.382.312.311.74SurfactantCoco-Glucoside (50%)1.251.251.251.25HumectantGlycerin7.252.007.007.00Skin ConditionerPolyquaternium 700.008900OpacifierOpacifier1.20000Fragrance0.50.4500.4500.350EmollientCaprylyl glycol0.1000.100Viscosity adjuster / emollientGlyceryl Oleate0.500.250.250.25Skin flora regulatorZinc sulfate (50%)0.0500.050Viscosity adjusterSodium Chloride (Q.S.)0.4400.7500.3750.750Thickener / Viscosity Adjusting AgentGlucamate LT000.4000.400PreservativeSodium Benzoate powder 100%0.40.40.40.4PreservativeSodium salicylate powder 100%0.30.30.30.3pH modifierLactic Acid (50%)0.5750.5750.5750.45pH modifierSodium lactate0.720.720.720.72pH4.2-4.64.2-4.64.2-4.64.2-4.8CP Viscosity (25 °C, SP #4, 20 RPM)4000-700015,000-25,00015,000-25,00015,000-25,000

[0054] The exemplary compositions described in Tables 5 and 6 above may be prepared according to conventional methods known to those skilled in the art. In particular, the exemplary composition of the present invention is prepared to ensure that the surfactant system provides the anionic and zwitterionic surfactants at certain weight ratios. The sodium laureth sulfate is provided in the form of a diluted solution containing 70% by weight of sodium laureth sulfate; the cocamidopropyl betaine is provided in the form of a diluted solution containing 30% by weight of cocamidopropyl betaine; the coco-glucoside is provided in the form of a diluted solution containing 50% by weight of coco-glucoside; and the lactic acid is provided in the form of a diluted solution containing 50% by weight of lactic acid.

[0055] The surfactant system includes sodium laureth sulfate as the anionic surfactant, cocamidopropyl betaine as the zwitterionic surfactant, and coco-glucoside as the nonionic surfactant. The viscosity adjusting (thickening) system includes glyceryl oleate and sodium chloride, and in two face wash formulations (Compositions I and J) Glucamate ™< LT thickener.

[0056] The compositions have high viscosities and excellent rheological properties.Comparative Example 4

[0057] Viscosities were determined for the shower gel of Composition G above with and without 0.5% glyceryl oleate at various Table Salt concentrations. The results are shown below in Table 7: Table 7% Table Salt Solution Composition G Shower Gel without Glyceryl Oleate Composition G Shower Gel with 0.5% Glyceryl Oleate 0.002030180200.503080260800.753810286001.004570296001.255060296001.506020262801.756760254802.007800175002.25891015340 % Table Salt Solution Composition G Shower Gel without Glyceryl Oleate Composition G Shower Gel with 0.5% Glyceryl Oleate 2.508340135602.75924087603.00978087603.501276048404.001272025504.501292016405.001160021605.5010020950

[0058] The viscosities were determined as described above (Brookfield DV-II+ Viscometer, 24 hours, Sp #4, 20 RPM, 25°C). It can be seen that the presence of 0.5% glyceryl oleate provides a significant increase in viscosity at relatively low salt concentrations.Example 5

[0059] Viscosities were determined for the Face Wash of Composition I above with and without 0.5% glyceryl oleate at various Table Salt concentrations. The results are shown below in Table 8A: Table 8A% Table Salt Solution Composition I Face Wash without Glyceryl Oleate Composition G Face Wash with 0.5% Glyceryl Oleate 0.002930118200.504000119400.754650116401.005300108401.25545099801.50594089001.75678082202.00687072202.25687066602.50787054802.75760045403.00804040603.50806035204.00781035604.50730025805.006280-5.505660-

[0060] The viscosities were determined as described above (Brookfield DV-II+ Viscometer, 24 hours, Sp #4, 20 RPM, 25°C). It can be seen that the presence of 0.5% glyceryl oleate provides a significant increase in viscosity at relatively low salt concentrations.Example 6

[0061] Viscosities were determined for the Face Wash of Composition I above at various brine concentrations with 0%, 0.25%, 0.4% and 0.5% glyceryl oleate (Table 7), and with 0% glyceryl oleate / 0% Glucamate; 0% glyceryl oleate / 0.25% Glucamate; and 0.25% glyceryl oleate / 0.25% Glucamate (Table 8B). The viscosities were determined under the same conditions as described above. Table 8BComposition I Men's Face Wash - Glyceryl Oleate and Brine wt% Brine (25% sol) Men's FW 0% Glyceryl Oleate Men's FW 0.25% Glyceryl Oleate Men's FW 0.4% Glyceryl Oleate Men's FW 0.5% Glyceryl Oleate 030703078451091101533053607810904027860786011440323039590125601870411040107205100807840679404360 It can be seen in Table 8B that the increase presence of glyceryl oleate provides a significant increase in viscosity at relatively low salt concentrations and that by increasing the level of glyceryl oleate one is able to decrease the level of sodium chloride required to thicken. Table 8C Composition I Men's Face Wash - Glyceryl Oleate and Glucamate wt% Brine (25% sol) Men's FW 0% Glyceryl Oleate / 0% Glucamate Men's FW 0% Glyceryl Oleate / 0.25% Glucamate Men's FW 0.25% Glyceryl Oleate / 0.25% Glucamate 030709320131801533011800152002786013300164603123401416041688011680

[0062] It can be seen in Table 8C that the increase presence of glyceryl oleate provides a significant increase in viscosity of Glucamate LT alone.Comparative Example 7

[0063] Viscosities were determined for the Face Wash of Composition H above at various brine concentrations with 0% and 0.25% glyceryl oleate. The results are shown in Table 9 below. The viscosities were determined under the same conditions as described above. Table 9Composition H Face Wash - Glyceryl Oleate and Brine wt% Brine (25% sol) Men's FW 0% Glyceryl Oleate Men's FW 0.25% Glyceryl Oleate 031201634029120371201478048940176805116001800061364019040

[0064] It can be seen in Table 9 that the increase presence of glyceryl oleate provides a significant increase in viscosity at relatively lower salt concentrations and allows one to achieve higher viscosities that are not possible without glyceryl oleate.Example 8

[0065] Viscosities were determined for the Face Wash of Composition J above at various brine concentrations with 0%, 0.25% and 0.5% glyceryl oleate. The results are shown in Table 10 below. The viscosities were determined under the same conditions as described above. Table 10Composition J Face Wash - Glyceryl Oleate and Brine wt% Brine (25% sol) Men's FW 0% Glyceryl Oleate Men's FW 0.25% Glyceryl Oleate Men's FW 0.5% Glyceryl Oleate 05505504170224329700435605050139006525077007180

[0066] It can be seen in Table 10 that the increase presence of glyceryl oleate provides a significant increase in viscosity at relatively low salt concentrations and that by increasing the level of glyceryl oleate one is able to decrease the level of sodium chloride required to thicken.

[0067] The invention has been described above with reference to illustrative Examples, but it is to be understood that the subject-matter of the present invention is defined in the appended claims.

Claims

1. A personal care composition comprising: a surfactant system consisting of: an anionic surfactant; a zwitterionic or amphoteric surfactant; and optionally a non-ionic surfactant; a preservative system; a pH modifier; optionally a moisturizer or a skin conditioner or both a moisturizer and a skin conditioner; and a viscosity adjusting system, wherein the viscosity adjusting system comprises glyceryl oleate and Glucamate LT which is a mixture of PEG-120 methyl glucose trioleate, propylene glycol and water.

2. The personal care composition of claim 1, wherein the viscosity adjusting system consists of glyceryl oleate and Glucamate LT which is a mixture of PEG-120 methyl glucose trioleate, propylene glycol and water.

3. The personal care composition of claim 2, wherein the glyceryl oleate is present in an amount of from 0.2-0.8% by weight of the composition and the Glucamate LT is present in an amount of from 0.1-2.5% by weight of the composition.

4. The personal care composition of claim 1, wherein the surfactant system consists of an anionic surfactant and an amphoteric surfactant, and is free of other surfactants; and wherein the weight ratio of anionic surfactant to amphoteric surfactant is from 1:1 to 4:1, 1.5:1 to 3.5:1, 2:1 to 3:1, or 2.5:1 by weight, based on the active weight of the surfactant.

5. The personal care composition of claim 4, wherein: the anionic surfactant is an alkyl ether sulfate, for example a linear C8-C18 alkyl ether sulfate, for example selected from sodium laureth sulfate, sodium lauryl sulfate, and ammonium lauryl sulfate, for example sodium laureth sulfate; and the amphoteric surfactant is a cocoamphoacetate salt, for example sodium cocoamphoacetate; and wherein the surfactant system comprises 5 to 15%, 7 to 13%, 8 to 12%, 9-11%, or 10-11%, or 10%, or 11% by weight of the personal care composition.

6. The personal care composition of claim 1, wherein the pH modifier is selected from lactic acid, sodium lactate, citric acid, hydrochloric acid, glycolic acid, sodium hydroxide, potassium chloride, monosodium citrate, disodium citrate, monosodium malate, sodium carbonate, bicarbonates, sesquicarbonates, borates, silicates, monosodium phosphate, trisodium phosphate, pyrophosphate salts, imidazole, and a combination of two or more thereof.

7. The personal care composition of claim 1, comprising a moisturizer and a conditioner, for example selected from long chain fatty acids; liquid water-soluble polyols; glycerin; propylene glycol; sorbitol; polyethylene glycol; ethoxylated / propoxylated ethers of methyl glucose (eg., methyl gluceth-20) and ethoxylated / -propoxylated ethers of lanolin alcohol (e.g., Solulan-75); coco and tallow fatty acids; nonoclusive liquid water soluble polyols; essential amino acids; sodium pyrrolidone carboxylic acid (or sodium dl-pyrrolidone carboxylate); urea; L-proline; guanidine; pyrrolidone; hexadecyl, myristyl, isodecyl or isopropyl esters of adipic, lactic, oleic, stearic, isostearic, myristic or linoleic acids and corresponding alcohol esters such as sodium isostearoyl-2 lactylate, sodium capryl lactylate; aloe vera gel and acetamide MEA; and film forming and conditioning polymers such as polyquaternium polymers; for example Polyquaternium 7 and Polyquaternium 10.

8. The personal care composition of claim 2, wherein the personal care composition is a shampoo composition and further comprises an anti-dandruff active; for example selected from piroctone olamine, zinc omadine, climbazole, pyridinethione salts, azoles, selenium sulfide, particulate sulfur, keratolytic agents, and mixtures thereof; and also further comprises one or more optional ingredients selected from fragrances, vitamins, extracts, proteins, antioxidants, pearlizers, opacifiers and a combination of two or more thereof.

9. The personal care composition of claim 1, wherein the viscosity adjusting system consists of glyceryl oleate, sodium chloride and Glucamate LT which is a mixture of PEG-120 methyl glucose trioleate, propylene glycol and water.

10. The personal care composition of claim 9, wherein the surfactant system consists of an anionic surfactant, a zwitterionic surfactant, and a nonionic surfactant; wherein: the weight ratio of anionic surfactant to zwitterionic surfactant to non-ionic surfactant is from (4.5-7):(1-3):(0.8-1.2); for example (5.5-6.5):(1-2):(0.9-1.1); for example (5.6-6):(1.4-1.9):(1) by weight, based on the active weight of the surfactant; the anionic surfactant is an alkyl ether sulfate, for example a linear C8-C18 alkyl ether sulfate, for example selected from sodium laureth sulfate, sodium lauryl sulfate, and ammonium lauryl sulfate, for example sodium laureth sulfate; the zwitterionic surfactant is a quaternary ammonium carboxylate betaine; for example cocoamidopropyl betaine; and the non-ionic surfactant is selected from ethoxylated aliphatic alcohols, alkyl glucosides such as coco glucoside, polyoxyethylene surfactants, carboxylic esters, polyethylene glycol esters, anhydrosorbitol ester, ethoxylated anhydrosorbitol ester, glycol esters of fatty acids, carboxylic amides, monoalkanolamine condensates and polyoxyethylene fatty acid amides; for example coco-glucoside; and wherein the surfactant system comprises 5 wt % to 15 wt %, 7 wt % to 13 wt %, 8 wt % to 12 wt %, 9-11 wt %, or 10-11 wt %, or 10 wt % of the composition, or 11 wt % of the composition.

11. The personal care composition of claim 9, wherein the personal care composition is a face wash composition, and optionally further comprises one or more of: a zinc salt skin flora regulator active; for example selected from zinc sulfate, zinc oxide, or zinc lactate, preferably zinc sulfate, and mixtures thereof; a humectant selected from glycerin, lactic acid, propylene glycol, sodium PCA, sorbitol, and mixtures thereof, preferably glycerin and / or lactic acid; for example in an amount of from 1-10% by weight of the composition, for example from 5-10%, for example from 6%-8% by weight of the composition, or for example from 1-3% by weight of the composition; and a conditioner, for example selected from long chain fatty acids; liquid water-soluble polyols; glycerin; propylene glycol; sorbitol; polyethylene glycol; ethoxylated / propoxylated ethers of methyl glucose (eg., methyl gluceth-20) and ethoxylated / -propoxylated ethers of lanolin alcohol (e.g., Solulan-75); coco and tallow fatty acids; nonoclusive liquid water soluble polyols; essential amino acids; sodium pyrrolidone carboxylic acid (or sodium dl-pyrrolidone carboxylate); urea; L-proline; guanidine; pyrrolidone; hexadecyl, myristyl, isodecyl or isopropyl esters of adipic, lactic, oleic, stearic, isostearic, myristic or linoleic acids and corresponding alcohol esters such as sodium isostearoyl-2 lactylate, sodium capryl lactylate; aloe vera gel and acetamide MEA; and film forming and conditioning polymers such as polyquaternium polymers; for example Polyquaternium 7 and Polyquaternium 10, for example Polyquaternium 7.

12. A method of cleansing hair comprising applying to the hair a composition according to claim 1.