EP4719322A1 - Sulfate free personal care rinse off formulation - Google Patents

Abstract

An aqueous personal care rinse off formulation is provided, comprising: dermatologically acceptable aqueous vehicle; dermatologically acceptable cleaning surfactant, wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant; and an alkyl polysaccharide thickener; wherein the alkyl polysaccharide thickener comprises 50-100 wt%, based on weight of the alkyl polysaccharide thickener, of linear alkyl polysaccharide of formula (A) R-O-(S)nH (A) wherein R is a linear C9-15 alkyl group; wherein n is an average of 1-2.5; wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, xylose, lyxose and mixtures thereof; and wherein 70-100 wt% of the monosaccharide S, based on weight of monosaccharide S in the linear alkyl polysaccharide of formula (A), is xylose; wherein with the aqueous personal care rinse off formulation comprises <0.01 wt%, based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant and alkyl ether sulfate surfactant.

Description

^{Attorney Docket No. 85429-WO-PCT} SULFATE FREE PERSONAL CARE RINSE OFF FORMULATION [0001] The present invention relates to a sulfate free aqueous personal care rinse off formulation. In particular, the present invention relates to an aqueous personal care rinse off formulation, comprising: a dermatologically acceptable aqueous vehicle; a dermatologically acceptable cleaning surfactant, wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant; and an alkyl polysaccharide thickener, wherein the alkyl polysaccharide thickener comprises 50 to 100 wt%, based on weight of the alkyl polysaccharide thickener, of a linear alkyl polysaccharide of formula A R-O-(S)nH (A) wherein R is a linear C_9-15 alkyl group; wherein n is an average of 1 to 2.5 and wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, xylose, lyxose and mixtures thereof; and wherein 70 to 100 wt% of the monosaccharide S, based on weight of monosaccharide S in the linear alkyl polysaccharide of formula A, is xylose; with the proviso that the alkyl polysaccharide thickener comprises < 15 wt%, based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula I (I) wherein R¹ is a linear or alkyl group; wherein G¹ is a monosaccharide with 4 to 6 carbon atoms and wherein x is 1.1 to 4; with the proviso that the alkyl polysaccharide thickener comprises < 1.5 wt%, based on weight of the alkyl polysaccharide thickener, of branched alkylpolysaccharide of formula II R³-(OG²)y (II) wherein R³ is an alkyl or alkenyl moiety containing 7 to 30 carbon atoms with branching at the 2 or higher carbon position on R³, wherein the branching is selected from the group consisting of methyl, ethyl, isopropyl, n-propyl, butyl, pentyl, hexyl and mixtures thereof; wherein G² is a saccharide moiety selected from the group consisting of glucose, fructose, mannose, galactose, talose, gulose, allose, altrose, idose, arabinose, xylose, lyxose, ribose and mixtures thereof and wherein y is an average of ≥ 2; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt%, based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant; and with the proviso that the ^{Attorney Docket No. 85429-WO-PCT} aqueous personal care rinse off formulation comprises < 0.01 wt%, based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant. [0002] Consumer trends in rinse off personal care products are moving away from the use of sodium laureth sulfate (SLES) based formulations and towards sulfate free surfactant systems where amino acid surfactants and other anionic surfactants such as isethionates are replacing SLES. Thickening is a key challenge in such SLES free formulations because the replacement surfactants generally do not form worm like micelles under practical formulation conditions. This problem is typically addressed through the use of polymeric rheology modifiers. [0003] However, conventional polymer rheology modifiers tend to exhibit poor biodegradability, are typically derived from petroleum and as such are not considered to be environmentally acceptable or renewable materials. [0004] Alkyl polyglucosides have been proposed as an alternative for use as thickeners in mixed surfactant personal care systems. However, such alkyl polyglucosides show limited efficacy for thickening sulfate free surfactant systems to desirable viscosity with low use levels. [0005] Accordingly, there remains a need for alternative thickeners that are effective at thickening a variety of sulfate free surfactant based personal care rinse off formulations, but also are naturally derived and biodegradable with an improved sustainability profile. [0006] The present invention provides an aqueous personal care rinse off formulation comprising: a dermatologically acceptable aqueous vehicle; a dermatologically acceptable cleaning surfactant, wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant; and an alkyl polysaccharide thickener; wherein the alkyl polysaccharide thickener comprises 50 to 100 wt%, based on weight of the alkyl polysaccharide thickener, of a linear alkyl polysaccharide of formula A R-O-(S)nH (A) wherein R is a linear C9-15 alkyl group; wherein n is an average of 1 to 2.5; wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, xylose, lyxose and mixtures thereof; and wherein 70 to 100 wt% of the monosaccharide S, based on weight of monosaccharide S in the linear alkyl polysaccharide of formula A, is xylose; with the proviso that the alkyl polysaccharide thickener comprises < 15 wt%, based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula I ^{Attorney Docket No. 85429-WO-PCT} (I) wherein R¹ is a linear or alkyl group; wherein G¹ is a to 4; with the proviso that the alkyl polysaccharide thickener comprises < 1.5 wt%, based on weight of the alkyl polysaccharide thickener, of branched alkylpolysaccharide of formula II R³-(OG²)_y (II) wherein R³ is an alkyl or alkenyl moiety containing 7 to 30 carbon atoms with branching at the 2 or higher carbon position on R³, wherein the branching is selected from the group consisting of methyl, ethyl, isopropyl, n-propyl, butyl, pentyl, hexyl and mixtures thereof; wherein G² is a saccharide moiety selected from the group consisting of glucose, fructose, mannose, galactose, talose, gulose, allose, altrose, idose, arabinose, xylose, lyxose, ribose and mixtures thereof and wherein y is an average of ≥ 2; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt%, based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant; and with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt%, based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant. [0007] The present invention provides an aqueous personal care rinse off formulation comprising: a dermatologically acceptable aqueous vehicle; a dermatologically acceptable cleaning surfactant, wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant; and an alkyl polysaccharide thickener; wherein the alkyl polysaccharide thickener comprises 50 to 100 wt%, based on weight of the alkyl polysaccharide thickener, of a linear alkyl polysaccharide of formula A R-O-(S)_nH (A) wherein R is a linear C9-15 alkyl group; wherein n is an average of 1 to 2.5; wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, xylose, lyxose and mixtures thereof; and wherein 70 to 100 wt% of the monosaccharide S, based on weight of monosaccharide S in the linear alkyl polysaccharide of formula A, is xylose; with the proviso that the alkyl polysaccharide thickener comprises < 15 wt%, based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula I ^{Attorney Docket No. 85429-WO-PCT} (I) wherein R¹ is a linear or alkyl group; wherein G¹ is a to 4; with the proviso that the alkyl polysaccharide thickener comprises < 1.5 wt%, based on weight of the alkyl polysaccharide thickener, of branched alkylpolysaccharide of formula II R³-(OG²)_y (II) wherein R³ is an alkyl or alkenyl moiety containing 7 to 30 carbon atoms with branching at the 2 or higher carbon position on R³, wherein the branching is selected from the group consisting of methyl, ethyl, isopropyl, n-propyl, butyl, pentyl, hexyl and mixtures thereof; wherein G² is a saccharide moiety selected from the group consisting of glucose, fructose, mannose, galactose, talose, gulose, allose, altrose, idose, arabinose, xylose, lyxose, ribose and mixtures thereof and wherein y is an average of ≥ 2; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt%, based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt%, based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant; and wherein the aqueous personal care rinse off formulation has a viscosity > 1,500 cP at 21 °C. [0008] The present invention provides a method of cleaning at least one of mammalian skin and hair, comprising: applying an aqueous personal care rinse off formulation of the present invention to the skin or hair of a mammal; and rinsing the aqueous personal care rinse off formulation from the skin or hair with a rinse water. D^ETAILED D^ESCRIPTION [0009] We have surprisingly found that aqueous personal care rinse off formulations comprising sulfate free surfactants may be effectively thickened using an alkyl polysaccharide thickener; wherein the alkyl polysaccharide thickener comprises 50 to 100 wt%, based on weight of the alkyl polysaccharide thickener, of a linear alkyl polysaccharide of formula A R-O-(S)_nH (A) wherein R is a linear C9-15 alkyl group; wherein n is an average of 1 to 2.5; wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, ^{Attorney Docket No. 85429-WO-PCT} xylose, lyxose and mixtures thereof; and wherein 70 to 100 wt% of the monosaccharide S, based on weight of monosaccharide S in the linear alkyl polysaccharide of formula A, is xylose; and that the linear alkyl polysaccharide of formula A of the present invention provide dramatically improved thickening performance over linear alkyl polyglucosides in such formulations. [0010] Unless otherwise indicated, ratios, percentages, parts, and the like are by weight. [0011] As used herein, unless otherwise indicated, the phrase "molecular weight" or MW refers to the weight average molecular weight as measured in a conventional manner with gel permeation chromatography (GPC) and conventional standards, such as polystyrene molecular weight standards. GPC techniques are discussed in detail in Modern Size Exclusion Liquid Chromatography – Practice of Gel Permeation and Gel Filtration Chromatography, Second Edition, A.M. Striegel, W. W. Yau, J. J. Kirkland, D. D. Bly; John Wiley & Sons, Inc.2009. Molecular weights are reported herein in units of Daltons, or equivalently, g/mol. [0012] The term "dermatologically acceptable" as used herein and in the appended refers to ingredients that are typically used for topical application to the skin, and is intended to underscore that materials that are toxic when present in the amounts typically found in skin care compositions are not contemplated as part of the present invention. [0013] Preferably, the aqueous personal care rinse off formulation of the present invention is selected from the group consisting of a shampoo, a conditioning shampoo, a body wash, an exfoliating body wash, a facial wash, an exfoliating facial wash and a liquid hand soap. More preferably, the aqueous personal care rinse off formulation of the present invention is selected from the group consisting of a shampoo, a conditioning shampoo, body wash, a facial wash and a liquid hand soap. Most preferably, the aqueous personal care rinse off formulation of the present invention is selected from the group consisting of a shampoo and a conditioning shampoo. [0014] Preferably, the aqueous personal care rinse off formulation of the present invention, comprises: a dermatologically acceptable aqueous vehicle (preferably, wherein the aqueous personal care rinse off formulation comprises 25 to 98.9 wt% (preferably, 30 to 97.6 wt%; more preferably, 40 to 94.5 wt%; most preferably, 50 to 91.9 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable aqueous vehicle); a dermatologically acceptable cleaning surfactant (preferably, wherein the aqueous personal care rinse off formulation comprises 1 to 50 wt% (preferably, 2 to 40 wt%; more preferably, 5 to 30 wt%; most preferably, 7.5 to 25 wt%), based on weight of the aqueous ^{Attorney Docket No. 85429-WO-PCT} personal care rinse off formulation, of a dermatologically acceptable cleaning surfactant), wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant; and an alkyl polysaccharide thickener (preferably, wherein the aqueous personal care rinse off formulation comprises 0.1 to 30 wt% (preferably, 0.4 to 20 wt%; more preferably, 0.5 to 20 wt%; most preferably, 0.6 to 5 wt%), based on weight of the aqueous personal care rinse off formulation, of an alkyl polysaccharide thickener), wherein the alkyl polysaccharide thickener comprises 50 to 100 wt% (preferably, 75 to 100 wt%; more preferably, 80 to 100 wt%; still more preferably, 90 to 100 wt%; still more preferably, 95 to 100 wt%; still yet more preferably, 98 to 100 wt%; yet still more preferably, 99 to 100 wt%; most preferably, 100 wt%), based on weight of the alkyl polysaccharide thickener, of a linear alkyl polysaccharide of formula A R-O-(S)nH (A) wherein R is a linear C9-15 alkyl group (preferably, a C9-14 alkyl group; more preferably, a C9- 13 alkyl group; most preferably, a C10-12 alkyl group); wherein n is an average of 1 to 2.5 (preferably, 1.1 to 2; more preferably, 1.1 to 1.75; most preferably, 1.15 to 1.5) and wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, xylose, lyxose and mixtures thereof (preferably, arabinose, xylose and mixtures thereof; most preferably, xylose); and wherein 70 to 100 wt% of the monosaccharide S (preferably, 80 to 100 wt%; more preferably, 85 to 100 wt%; still more preferably, 90 to 100 wt%; yet more preferably, 95 to 100 wt%; still yet more preferably, 98 to 100 wt%; most preferably, 99 to 100 wt%), based on weight of monosaccharide S in the linear alkyl polysaccharide of formula A, is xylose; with the proviso that the alkyl polysaccharide thickener comprises < 15 wt% (preferably, < 10 wt%; more preferably, < 1 wt%; still more preferably, < 0.1 wt%; yet more preferably, 0.01 wt%; still yet more preferably, 0.001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula I (I) wherein R¹ is a linear or alkyl group; wherein G¹ is a monosaccharide with 4 to 6 carbon atoms and wherein x is 1.1 to 4; with the proviso that the alkyl polysaccharide thickener comprises < 1.5 wt% (preferably, ^{Attorney Docket No. 85429-WO-PCT} < 1 wt%; more preferably, < 0.5 wt%; still more preferably, < 0.1 wt%; yet more preferably, < 0.01 wt%; still yet more preferably, < 0.001 wt%; yet still more preferably, < 0.0001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkylpolysaccharide of formula II R³-(OG²)y (II) wherein R³ is an alkyl or alkenyl moiety containing 7 to 30 carbon atoms with branching at the 2 or higher carbon position on R³, wherein the branching is selected from the group consisting of methyl, ethyl, isopropyl, n-propyl, butyl, pentyl, hexyl and mixtures thereof; wherein G² is a saccharide moiety selected from the group consisting of glucose, fructose, mannose, galactose, talose, gulose, allose, altrose, idose, arabinose, xylose, lyxose, ribose and mixtures thereof and wherein y is an average of ≥ 2 (preferably, 2 to 10); with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant (e.g., sodium dodecyl sulfate, sodium lauryl sulfate); and with the proviso that the aqueous personal care rinse off formulation comprises (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant (e.g. sodium laureth sulfate, ammonium laureth sulfate). [0015] More preferably, the aqueous personal care rinse off formulation of the present invention, comprises: a dermatologically acceptable aqueous vehicle (preferably, wherein the aqueous personal care rinse off formulation comprises 25 to 98.9 wt% (preferably, 30 to 97.6 wt%; more preferably, 40 to 94.5 wt%; most preferably, 50 to 91.9 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable aqueous vehicle); a dermatologically acceptable cleaning surfactant (preferably, wherein the aqueous personal care rinse off formulation comprises 1 to 50 wt% (preferably, 2 to 40 wt%; more preferably, 5 to 30 wt%; most preferably, 7.5 to 25 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable cleaning surfactant), wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant; and an alkyl polysaccharide thickener (preferably, wherein the aqueous personal care rinse off formulation comprises 0.1 to 30 wt% (preferably, 0.4 to 20 wt%; more preferably, 0.5 to 20 wt%; most preferably, 0.6 to 5 wt%), based on weight of the aqueous personal care rinse off formulation, of an alkyl polysaccharide thickener), wherein the alkyl polysaccharide ^{Attorney Docket No. 85429-WO-PCT} thickener comprises 50 to 100 wt% (preferably, 75 to 100 wt%; more preferably, 80 to 100 wt%; still more preferably, 90 to 100 wt%; still more preferably, 95 to 100 wt%; still yet more preferably, 98 to 100 wt%; yet still more preferably, 99 to 100 wt%; most preferably, 100 wt%), based on weight of the alkyl polysaccharide thickener, of a linear alkyl polysaccharide of formula A R-O-(S)_nH (A) wherein R is a linear C9-15 alkyl group (preferably, a C9-14 alkyl group; more preferably, a C9- ₁₃ alkyl group; most preferably, a C_10-12 alkyl group); wherein n is an average of 1 to 2.5 (preferably, 1.1 to 2; more preferably, 1.1 to 1.75; most preferably, 1.15 to 1.5); wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, xylose, lyxose and mixtures thereof (preferably, arabinose, xylose and mixtures thereof; most preferably, xylose); and wherein 70 to 100 wt% of the monosaccharide S (preferably, 80 to 100 wt%; more preferably, 85 to 100 wt%; still more preferably, 90 to 100 wt%; yet more preferably, 95 to 100 wt%; still yet more preferably, 98 to 100 wt%; most preferably, 99 to 100 wt%), based on weight of monosaccharide S in the linear alkyl polysaccharide of formula A, is xylose; wherein the linear alkyl polysaccharide of formula A comprises 0.1 to 39 wt% (preferably, 1 to 25 wt%) of a combined weight of the linear alkyl polysaccharide of formula A and the dermatologically acceptable cleaning surfactant in the aqueous personal care rinse off composition; with the proviso that the alkyl polysaccharide thickener comprises < 15 wt% (preferably, < 10 wt%; more preferably, < 1 wt%; still more preferably, < 0.1 wt%; yet more preferably, 0.01 wt%; still yet more preferably, 0.001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula I (I) wherein R¹ is a linear or alkyl group; wherein G¹ is a monosaccharide with 4 to 6 carbon atoms and wherein x is 1.1 to 4; with the proviso that the alkyl polysaccharide thickener comprises < 1.5 wt% (preferably, < 1 wt%; more preferably, < 0.5 wt%; still more preferably, < 0.1 wt%; yet more preferably, < 0.01 wt%; still yet more preferably, < 0.001 wt%; yet still more preferably, < 0.0001 wt%; ^{Attorney Docket No. 85429-WO-PCT} most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkylpolysaccharide of formula II R³-(OG²)y (II) wherein R³ is an alkyl or alkenyl moiety containing 7 to 30 carbon atoms with branching at the 2 or higher carbon position on R³, wherein the branching is selected from the group consisting of methyl, ethyl, isopropyl, n-propyl, butyl, pentyl, hexyl and mixtures thereof; wherein G² is a saccharide moiety selected from the group consisting of glucose, fructose, mannose, galactose, talose, gulose, allose, altrose, idose, arabinose, xylose, lyxose, ribose and mixtures thereof and wherein y is an average of ≥ 2 (preferably, 2 to 10); with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant (e.g., sodium dodecyl sulfate, sodium lauryl sulfate); and with the proviso that the aqueous personal care rinse off formulation comprises (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant (e.g. sodium laureth sulfate, ammonium laureth sulfate). [0016] Preferably, the aqueous personal care rinse off formulation of the present invention, comprises a dermatologically acceptable aqueous vehicle. More preferably, the aqueous personal care rinse off formulation of the present invention, comprises: 25 to 98.9 wt% (preferably, 30 to 97.6 wt%; more preferably, 40 to 94.5 wt%; most preferably, 50 to 91.9 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable aqueous vehicle. Still more preferably, the aqueous personal care rinse off formulation of the present invention, comprises: 25 to 98.9 wt% (preferably, 30 to 97.6 wt%; more preferably, 40 to 94.5 wt%; most preferably, 50 to 91.9 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable aqueous vehicle; wherein the dermatologically acceptable aqueous vehicle comprises water. Yet more preferably, the aqueous personal care rinse off formulation of the present invention, comprises: 25 to 98.9 wt% (preferably, 30 to 97.6 wt%; more preferably, 40 to 94.5 wt%; most preferably, 50 to 91.9 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable aqueous vehicle; wherein the dermatologically acceptable aqueous vehicle is selected from the group consisting of water and an aqueous C1-4 alcohol mixture. Most preferably, the aqueous personal care rinse off formulation of the ^{Attorney Docket No. 85429-WO-PCT} present invention, comprises: 25 to 98.9 wt% (preferably, 30 to 97.6 wt%; more preferably, 40 to 94.5 wt%; most preferably, 50 to 91.9 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable aqueous vehicle, wherein the dermatologically acceptable aqueous vehicle is water. [0017] Preferably, the water used in the aqueous personal care rinse off formulation of the present invention is at least one of distilled water and deionized water. More preferably, the water used in the aqueous personal care rinse off formulation of the present invention is distilled and deionized. [0018] Preferably, the aqueous personal care rinse off formulation of the present invention comprises 1 to 50 wt% (preferably, 2 to 40 wt%; more preferably, 5 to 30 wt%; most preferably, 7.5 to 25 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable cleaning surfactant; wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant; and with the proviso that the aqueous personal care rinse off formulation comprises (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant. More preferably, the aqueous personal care rinse off formulation of the present invention comprises 1 to 50 wt% (preferably, 2 to 40 wt%; more preferably, 5 to 30 wt%; most preferably, 7.5 to 25 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable cleaning surfactant; wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant selected from the group consisting of glycinates (e.g., sodium cocoyl glycinate), taurates (e.g., sodium methyl cocoyl taurate), glutamates (e.g., sodium cocoyl glutamate), sarcosinates (e.g., sodium lauroyl sarcosinate), isethionates (e.g., sodium cocoyl isethionate, sodium lauroyl methyl isethionate), sulfoacetates (e.g., sodium lauryl sulfoacetate), alaninates (e.g., sodium cocoyl alaninate), sulfonates (e.g., sodium C_14-16 olefin sulfonate), succinates (e.g., disodium lauryl sulfosuccinate), carboxylates (e.g., sodium lauryl glucose carboxylate) and mixtures thereof; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal ^{Attorney Docket No. 85429-WO-PCT} care rinse off formulation, of alkyl sulfate surfactant; and with the proviso that the aqueous personal care rinse off formulation comprises (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant. Most preferably, the aqueous personal care rinse off formulation of the present invention comprises 1 to 50 wt% (preferably, 2 to 40 wt%; more preferably, 5 to 30 wt%; most preferably, 7.5 to 25 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable cleaning surfactant; wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant selected from the group consisting of glycinates (e.g., sodium cocoyl glycinate), sarcosinates (e.g., sodium lauroyl sarcosinate), isethionates (e.g., sodium cocoyl isethionate, sodium lauroyl methyl isethionate), alaninates (e.g., sodium cocoyl alaninate), sulfonates (e.g., sodium C14-16 olefin sulfonate) and mixtures thereof; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant; and with the proviso that the aqueous personal care rinse off formulation comprises (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant. [0019] Preferably, the aqueous personal care rinse off formulation of the present invention comprises 1 to 50 wt% (preferably, 2 to 40 wt%; more preferably, 5 to 30 wt%; most preferably, 7.5 to 25 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable cleaning surfactant; wherein the dermatologically acceptable cleaning surfactant comprises a mixture of an anionic surfactant and a amphoteric surfactant with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant; and with the proviso that the aqueous personal care rinse off formulation comprises (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant. More preferably, the aqueous personal care rinse off formulation of the present invention comprises 1 to 50 wt% ^{Attorney Docket No. 85429-WO-PCT} (preferably, 2 to 40 wt%; more preferably, 5 to 30 wt%; most preferably, 7.5 to 25 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable cleaning surfactant; wherein the dermatologically acceptable cleaning surfactant comprises a mixture of an anionic surfactant and a amphoteric surfactant; wherein the anionic surfactant is selected from the group consisting of glycinates (e.g., sodium cocoyl glycinate), taurates (e.g., sodium methyl cocoyl taurate), glutamates (e.g., sodium cocoyl glutamate), sarcosinates (e.g., sodium lauroyl sarcosinate), isethionates (e.g., sodium cocoyl isethionate, sodium lauroyl methyl isethionate), sulfoacetates (e.g., sodium lauryl sulfoacetate), alaninates (e.g., sodium cocoyl alaninate), sulfonates (e.g., sodium C14-16 olefin sulfonate), succinates (e.g., disodium lauryl sulfosuccinate), carboxylates (e.g., sodium lauryl glucose carboxylate) and mixtures thereof; and wherein the amphoteric surfactant is selected from the group consisting of betaines (e.g., alkyl betaines such as trimethylglycine and cetyl betaine; and amido betaines such as cocamidopropyl betaine); amphoacetates (e.g., sodium cocoamphoacetate); sultaines (e.g., cocamidopropyl hydroxysultaine) and mixtures thereof; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant; and with the proviso that the aqueous personal care rinse off formulation comprises (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant. Most preferably, the aqueous personal care rinse off formulation of the present invention comprises 1 to 50 wt% (preferably, 2 to 40 wt%; more preferably, 5 to 30 wt%; most preferably, 7.5 to 25 wt%), based on weight of the aqueous personal care rinse off formulation, of a dermatologically acceptable cleaning surfactant; wherein the dermatologically acceptable cleaning surfactant comprises a mixture of cocamidopropyl betaine with an anionic surfactant selected from the group consisting of glycinates (e.g., sodium cocoyl glycinate), sarcosinates (e.g., sodium lauroyl sarcosinate), isethionates (e.g., sodium cocoyl isethionate, sodium lauroyl methyl isethionate), alaninates (e.g., sodium cocoyl alaninate), sulfonates (e.g., sodium C_14-16 olefin sulfonate) and mixtures thereof; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant; and with the proviso that the aqueous ^{Attorney Docket No. 85429-WO-PCT} personal care rinse off formulation comprises (preferably, < 0.001 wt%; more preferably, < 0.0001 wt%; still more preferably, < 0.00001 wt%; most preferably, less than the detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant. [0020] The dermatologically acceptable cleaning surfactant optionally further comprises a cationic surfactant. Cationic surfactants include quaternary ammonia compounds (e.g., behentrimonium chloride, cetrimonium chloride) or amine-based surfactants (e.g., stearamidopropyl dimethylamine). [0021] The dermatologically acceptable cleaning surfactant optionally further comprises a nonionic surfactant with the proviso that when the dermatologically acceptable cleaning surfactant comprises a nonionic surfactant other than the alkyl polysaccharide thickener, the weight ratio of the anionic surfactant to the nonionic surfactant in the aqueous personal care rinse off formulation is greater than 1:1 (preferably, >2:1; more preferably >2.5:1) (i.e., the dermatologically acceptable anionic cleaning surfactant predominates over any nonionic surfactant present, excluding the alkyl polysaccharide thickener) (i.e., the alkyl polysaccharide thickener is not considered a nonionic surfactant for purposes of the anionic to nonionic cleaning surfactant weight ratio). Nonionic surfactants include fatty alcohols (e.g., cetearyl alcohol, stearyl alcohol, cetyl alcohol, lauryl alcohol) and fatty alkanolamides (e.g., cocamide monoethanolamine, cocamide, diethanolamine, soyamide diethanolamine, lauramide diethanolamine, oleamide monoisopropanolamine, stearamide monoethanolamine, myristamide monoethanolamine, lauramide monoethanolamine, capramide diethanolamine, ricinoleamide diethanolamine, myristamide diethanolamine, stearamide diethanolamine, oleylamide diethanolamine, tallowamide diethanolamine, lauramide monoisopropanolamine, tallowamide monoethanolamine, isostearamide diethanolamine, isostearamide diethanolamine, isostearamide monoethanolamine). [0022] Preferably, the aqueous personal care rinse off formulation of the present invention comprises 0.1 to 30 wt% (preferably, 0.4 to 20 wt%; more preferably, 0.5 to 20 wt%; most preferably, 0.6 to 5 wt%), based on weight of the aqueous personal care rinse off formulation, of an alkyl polysaccharide thickener, wherein the alkyl polysaccharide thickener comprises 50 to 100 wt% (preferably, 75 to 100 wt%; more preferably, 80 to 100 wt%; still more preferably, 90 to 100 wt%; still more preferably, 95 to 100 wt%; still yet more preferably, 98 to 100 wt%; yet still more preferably, 99 to 100 wt%; most preferably, 100 wt%), based on weight of the alkyl polysaccharide thickener, of a linear alkyl polysaccharide of formula A R-O-(S)_nH (A) ^{Attorney Docket No. 85429-WO-PCT} wherein R is a linear C_9-15 alkyl group (preferably, a C_9-14 alkyl group; more preferably, a C_{9- 13} alkyl group; most preferably, a C_10-12 alkyl group); wherein n is an average of 1 to 2.5 (preferably, 1.1 to 2; more preferably, 1.1 to 1.75; most preferably, 1.15 to 1.5); wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, xylose, lyxose and mixtures thereof (preferably, arabinose, xylose and mixtures thereof; most preferably, xylose); and wherein 70 to 100 wt% of the monosaccharide S (preferably, 80 to 100 wt%; more preferably, 85 to 100 wt%; still more preferably, 90 to 100 wt%; yet more preferably, 95 to 100 wt%; still yet more preferably, 98 to 100 wt%; most preferably, 99 to 100 wt%), based on weight of monosaccharide S in the linear alkyl polysaccharide of formula A, is xylose; with the proviso that the alkyl polysaccharide thickener comprises < 15 wt% (preferably, < 10 wt%; more preferably, < 1 wt%; still more preferably, < 0.1 wt%; yet more preferably, 0.01 wt%; still yet more preferably, 0.001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula I (I) wherein R¹ is a linear or alkyl group; wherein G¹ is a monosaccharide with 4 to 6 carbon atoms and wherein x is 1.1 to 4; and with the proviso that the alkyl polysaccharide thickener comprises < 1.5 wt% (preferably, < 1 wt%; more preferably, < 0.5 wt%; still more preferably, < 0.1 wt%; yet more preferably, < 0.01 wt%; still yet more preferably, < 0.001 wt%; yet still more preferably, < 0.0001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkylpolysaccharide of formula II R³-(OG²)_y (II) wherein R³ is an alkyl or alkenyl moiety containing 7 to 30 carbon atoms with branching at the 2 or higher carbon position on R³, wherein the branching is selected from the group consisting of methyl, ethyl, isopropyl, n-propyl, butyl, pentyl, hexyl and mixtures thereof; wherein G² is a saccharide moiety selected from the group consisting of glucose, fructose, mannose, galactose, talose, gulose, allose, altrose, idose, arabinose, xylose, lyxose, ribose and mixtures thereof and wherein y is an average of ≥ 2 (preferably, 2 to 10). ^{Attorney Docket No. 85429-WO-PCT} [0023] Preferably, the aqueous personal care rinse off formulation of the present invention comprises 0.1 to 30 wt% (preferably, 0.4 to 20 wt%; more preferably, 0.5 to 20 wt%; most preferably, 0.6 to 5 wt%), based on weight of the aqueous personal care rinse off formulation, of an alkyl polysaccharide thickener, wherein the alkyl polysaccharide thickener comprises 50 to 100 wt% (preferably, 75 to 100 wt%; more preferably, 80 to 100 wt%; still more preferably, 90 to 100 wt%; still more preferably, 95 to 100 wt%; still yet more preferably, 98 to 100 wt%; yet still more preferably, 99 to 100 wt%; most preferably, 100 wt%), based on weight of the alkyl polysaccharide thickener, of a linear alkyl polysaccharide of formula A R-O-(S)nH (A) wherein R is a linear C_9-15 alkyl group (preferably, a C_9-14 alkyl group; more preferably, a C_9- 13 alkyl group; most preferably, a C10-12 alkyl group); wherein n is an average of 1 to 2.5 (preferably, 1.1 to 2; more preferably, 1.1 to 1.75; most preferably, 1.15 to 1.5); wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, xylose, lyxose and mixtures thereof (preferably, arabinose, xylose and mixtures thereof; most preferably, xylose); and wherein 70 to 100 wt% of the monosaccharide S (preferably, 80 to 100 wt%; more preferably, 85 to 100 wt%; still more preferably, 90 to 100 wt%; yet more preferably, 95 to 100 wt%; still yet more preferably, 98 to 100 wt%; most preferably, 99 to 100 wt%), based on weight of monosaccharide S in the linear alkyl polysaccharide of formula A, is xylose; with the proviso that the alkyl polysaccharide thickener comprises < 15 wt% (preferably, < 10 wt%; more preferably, < 1 wt%; still more preferably, < 0.1 wt%; yet more preferably, 0.01 wt%; still yet more preferably, 0.001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula I (I) wherein R¹ is a linear or alkyl group; wherein G¹ is a monosaccharide with 4 to 6 carbon atoms and wherein x is 1.1 to 4; with the proviso that the alkyl polysaccharide thickener comprises < 1.5 wt% (preferably, < 1 wt%; more preferably, < 0.5 wt%; still more preferably, < 0.1 wt%; yet more preferably, < 0.01 wt%; still yet more preferably, < 0.001 wt%; yet still more preferably, < 0.0001 wt%; ^{Attorney Docket No. 85429-WO-PCT} most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkylpolysaccharide of formula II R³-(OG²)y (II) wherein R³ is an alkyl or alkenyl moiety containing 7 to 30 carbon atoms with branching at the 2 or higher carbon position on R³, wherein the branching is selected from the group consisting of methyl, ethyl, isopropyl, n-propyl, butyl, pentyl, hexyl and mixtures thereof; wherein G² is a saccharide moiety selected from the group consisting of glucose, fructose, mannose, galactose, talose, gulose, allose, altrose, idose, arabinose, xylose, lyxose, ribose and mixtures thereof and wherein y is an average of ≥ 2 (preferably, 2 to 10); and with any one or more of the following additional provisos (i)-(x), namely: (i) with the proviso that the alkyl polysaccharide thickener comprises < 1 wt% (preferably, < 0.5 wt%; more preferably, < 0.1 wt%; still more preferably, < 0.01 wt%; yet more preferably, < 0.001 wt%; still yet more preferably, < 0.0001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula III R⁴-O-(G³)pH (III) wherein R⁴ is a branched C8-15 alkyl group; wherein G³ is a monosaccharide with 5 or 6 carbon atoms and wherein p is an average of 1 to 10; (ii) with the proviso that the alkyl polysaccharide thickener comprises < 10 wt% (preferably, < 1 wt%; more preferably, < 0.1 wt%; still more preferably, < 0.01 wt%; yet more preferably, < 0.001 wt%; still yet more preferably, < 0.0001 wt%; yet still more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula IV wherein R⁵ is –(CH2)rCH(CH3)2; with 4 to 6 carbon atoms; wherein m is 1.1 to 4 and wherein r is 0 to 3; (iii) with the proviso that the alkyl polysaccharide thickener comprises < 1.5 wt% (preferably, < 1 wt%; more preferably, < 0.1 wt%; still more preferably, < 0.01 wt%; yet more preferably, < 0.001 wt%; still yet more preferably, < 0.0001 wt%; yet still more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula V ^{Attorney Docket No. 85429-WO-PCT} wherein R⁷ is –(CH₂)_bCH(CH₃)₂; monosaccharide with 4 to 6 with the proviso that the alkyl polysaccharide thickener comprises < 0.5 wt% (preferably, < 0.1 wt%; more preferably, < 0.05 wt%; still more preferably, < 0.01 wt%; yet more preferably, < 0.001 wt%; still yet more preferably, < 0.0001 wt%; yet still more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula VI wherein R⁹ is –(CH₂)_d+1CH₃; with 4 to 6 carbon atoms; wherein d is 0 to 3 and wherein c is 1.1 to 4; (v) with the proviso that the alkyl polysaccharide thickener comprises < 0.05 wt% (preferably, < 0.01 wt%; more preferably, < 0.005 wt%; still more preferably, < 0.001 wt%; yet more preferably, < 0.0001 wt%; still yet more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of compound of formula VII wherein R¹¹ is a hydrogen or a a -CH2CH2R¹¹ group; wherein G⁷ is glucose or xylose, wherein an amount of glucose ranges from 70 to 95 mol% and an amount of xylose ranges from 5 to 30 mol% and wherein f is 1.1 to 4; (vi) with the proviso that the alkyl polysaccharide thickener comprises < 5 wt% (preferably, < 1 wt%; more preferably, < 0.5 wt%; still more preferably, < 0.1 wt%; yet more preferably, < 0.01 wt%; still yet more preferably, < 0.001 wt%; yet still more preferably, < ^{Attorney Docket No. 85429-WO-PCT} 0.0001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula VIII wherein R¹³ is –(CH₂)_kCH₃; with 4 to 6 carbon atoms; that the alkyl polysaccharide thickener comprises < 1 wt% (preferably, < 0.5 wt%; more preferably, < 0.1 wt%; still more preferably, < 0.05 wt%; yet more preferably, < 0.01 wt%; still yet more preferably, < 0.001 wt%; yet still more preferably, < 0.0001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula IX wherein R¹⁵ is –(CH₂)_tCH₃; monosaccharide with 4 to 6 carbon atoms; wherein s is 1.1 to 10 and wherein t is 1 to 4; (viii) with the proviso that the alkyl polysaccharide thickener comprises < 0.2 wt% (preferably, < 0.1 wt%; more preferably, < 0.05 wt%; still more preferably, < 0.01 wt%; yet more preferably, < 0.001 wt%; still yet more preferably, < 0.0001 wt%; yet still more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula X wherein R¹⁷ is –(CH2)v+1CH monosaccharide with 4 to 6 carbon atoms; wherein u is 1.1 to 10 and wherein v is 1 to 4; (ix) with the proviso that when the alkyl polysaccharide thickener comprises both fatty acid ester C_12-23 alkyl-(O)O- moieties and fatty acid ester C_6-10 alkyl-(O)O- moieties, the mole ratio of ^{Attorney Docket No. 85429-WO-PCT} the C_12-23 alkyl-(O)O- moieties to the C_6-10 alkyl-(O)O- moieties is > 1.1:1 (preferably, > 1.2:1; more preferably, > 1.3:1; still more preferably, > 1.5:1; most preferably, > 2:1); and/or (x) with the proviso that the alkyl polysaccharide thickener comprises < 0.1 wt% (preferably, < 0.05 wt%; more preferably, < 0.01 wt%; still more preferably, < 0.001 wt%; yet more preferably, < 0.0001 wt%; still yet more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based on weight of the alkyl polysaccharide thickener, of linear alkyl polyglucoside of formula XIII R²³-O-(G¹²)_iH (XIII) wherein R²³ is a linear C1-8 alkyl group; wherein G¹² is a monosaccharide with 5 or 6 carbon atoms and wherein i is an average of 1 to 10. [0024] Preferably, the aqueous personal care rinse off formulation of the present invention, further comprises at least one ingredient selected from the group consisting of an absorbent; an aesthetic enhancer (e.g., starch); an alpha hydroxy acid; an antiaging agent; an antidandruff agent; an antifungal; an antimicrobial agent; an antioxidant (e.g., butylated hydroxytoluene); an antiseptic; an antistatic agent; a bioactive agent; a bleaching agent; a chelating agent; a colorant; a conditioning agent (e.g., silicone, polyquaternium, cationic guar); a dye; an emollient; an emulsifying agent; a film former (e.g., water proofing agent); a fixative polymer; a foaming agent; a fragrance; a hard particle; a humectant (e.g., glycerin, sorbitol, monoglycerides, lecithins, glycolipids, fatty alcohols, fatty acids, polysaccharides, sorbitan esters, polysorbates (e.g., Polysorbate 20, Polysorbate 40, Polysorbate 60, and Polysorbate 80), diols (e.g., propylene glycol), diol analogs, triols, triol analogs, cationic polymeric polyols); a lubricating agent; an opacifier; a pearlizing agent; a penetrant; a pH adjusting agent; a pigment; a plant extract; a preservative (e.g., benzoic acid, sorbic acid, phenoxyethanol); a protein/amino acid; a rheology modifier; a salt (e.g., NaCl); a sensory modifier; a slip agent; a soap; a soft particle; a sunscreen additive; a suspending agent; a UV light inhibitor; a vitamin and mixtures thereof. [0025] Preferably, the aqueous personal care rinse off formulation of the present invention, further comprises 0 to 10 wt% (preferably, 0 to 3 wt%), based on weight of the aqueous personal care rinse off formulation, of a salt (e.g., NaCl). [0026] Preferably, the aqueous personal care rinse off formulation of the present invention, further comprises an antimicrobial agent. More preferably, the aqueous personal care rinse off formulation of the present invention, further comprises an antimicrobial agent; wherein the antimicrobial agent is selected from the group consisting of phenoxyethanol, benzoic acid, benzyl alcohol, sodium benzoate, DMDM hydantoin, 2-ethylhexyl glyceryl ether and ^{Attorney Docket No. 85429-WO-PCT} isothiazolinone (e.g., methylchloroisothiazolinone, methylisothiazolinone). Still more preferably, the aqueous personal care rinse off formulation of the present invention, further comprises an antimicrobial agent; wherein the antimicrobial agent is an isothiazolinone (more preferably, wherein the antimicrobial is selected from the group consisting of methylisothiazolinone, methylchloroisothiazolinone and mixtures thereof; most preferably, wherein the biocide is methylisothiazolinone). [0027] Preferably, the aqueous personal care rinse off formulation of the present invention, further comprises a pH adjusting agent. More preferably, the aqueous personal care rinse off formulation of the present invention, further comprises a pH adjusting agent; wherein the aqueous personal care rinse off formulation has a pH of 4.5 to 9 (preferably, 5 to 8; most preferably, 5 to 7). [0028] Preferably, the pH adjusting agent is selected from the group consisting of at least one of citric acid, lactic acid, hydrochloric acid, aminoethyl propanediol, triethanolamine, monoethanolamine, sodium hydroxide, potassium hydroxide, amino-2-methyl-1-propanol. More preferably, the pH adjusting agent is selected from the group consisting of at least one of citric acid, lactic acid, sodium hydroxide, potassium hydroxide, triethanolamine, amino-2-methyl-1-propanol. Still more preferably, the pH adjusting agent includes is triethanolamine. Most preferably, the pH adjusting agent is triethanolamine. [0029] Preferably, the aqueous personal care rinse off formulation has a viscosity > 1,500 cP at 21 °C (preferably, 2,000 to 50,000 cP at 21 °C; more preferably, 2,500 to 30,000 cP at 21 °C; still more preferably, 3,000 to 25,000 cP at 21 °C; yet more preferably, 4,000 to 20,000 cP at 21 °C; most preferably, 5,000 to 15,000 cP at 21 °C) (preferably, measured after 24 hours in a temperature-controlled room (21±3° C.), using a Brookfield Viscosimeter Model DV-II+ at 30 RPM, with a RV spindle 31. The viscosity value can be taken after a stabilization time of 1 min). [0030] Preferably, the aqueous personal care rinse off formulation comprises < 0.05 wt% (preferably, < 0.01 wt%; more preferably, < 0.005 wt%; still more preferably, < 0.001 wt%; yet more preferably, < 0.0005 wt%; still yet more preferably, < 0.0001 wt%; yet still more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based on weight of the aqueous personal care rinse off formulation, of branched alkyl polysaccharide of formula IV ^{Attorney Docket No. 85429-WO-PCT} wherein R⁵ is –(CH₂)_rCH(CH₃)₂; with 4 to 6 carbon atoms; [0031] Preferably, the aqueous personal care rinse off formulation comprises < 0.1 wt% (preferably, < 0.01 wt%; more preferably, < 0.001 wt%; still more preferably, < 0.0001 wt%; yet more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based on weight of the aqueous personal care rinse off formulation, of branched alkyl polysaccharide according to formula XI wherein R¹⁹ is a C_2-4 alkyl group; carbon atoms in R¹⁹ and R²⁰ is 7 to 11; wherein G¹¹ is a monosaccharide (i.e., glucose, mannose, galactose, talose, allose, altrose, idose, arabinose, xylose, ribose, lyxose and mixtures thereof) and wherein w is 1 to 4. [0032] Preferably, the aqueous personal care rinse off formulation comprises < 0.05 wt% (preferably, < 0.01; more preferably, < 0.005; still more preferably, < 0.001; yet more preferably, < 0.0005; still yet more preferably, < 0.0001 wt%; most preferably, less than detectable limit), based on weight of the aqueous personal care rinse off formulation, of a fatty acid alkyl ester alkoxylate of formula XII R²¹CO₂-(AO)_e-R²² (XII) wherein R²¹ is a linear or branched, saturated or unsaturated, alkyl group containing 5 to 21 carbon atoms; wherein AO is a C_2-4 alkylene oxide group; wherein e is 1 to 30 and wherein R²² is a linear or branched alkyl group containing 1 to 6 carbon atoms. [0033] Preferably, the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.005 wt%; more preferably, < 0.001 wt%; still more preferably, < 0.0001 wt%; yet more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based ^{Attorney Docket No. 85429-WO-PCT} on weight of the aqueous personal care rinse off formulation, of alkyl polyglucoside (e.g., a C_1-30 alkyl polyglucoside). [0034] Preferably, the aqueous personal care rinse off formulation comprises < 0.1 wt% (preferably, < 0.05 wt%; more preferably, < 0.01 wt%; still more preferably, < 0.001 wt%; yet more preferably, < 0.0001 wt%; most preferably, less than detectable limit), based on weight of the aqueous personal care rinse off formulation, of C_6-24 alkyl polyglucoside (e.g., polyglucoside). [0035] Preferably, the aqueous personal care rinse off formulation comprises < 0.01 wt% (preferably, < 0.005 wt%; more preferably, < 0.001 wt%; still more preferably, < 0.0001 wt%; yet more preferably, < 0.00001 wt%; most preferably, less than detectable limit), based on weight of the aqueous personal care rinse off formulation, of alkyl polysaccharide thickener comprising fatty acid ester C12-23 alkyl-(O)O- moieties and/or fatty acid ester C6-10 alkyl-(O)O- moieties. [0036] Preferably, the method of cleaning at least one of mammalian skin and hair (preferably, at least one of human skin and hair) of the present invention, comprises: applying an aqueous personal care rinse off formulation of the present invention to the skin or hair of a mammal (preferably, skin or hair of a human); and rinsing the aqueous personal care rinse off formulation from the skin or hair with a rinse water. [0037] Some embodiments of the present invention will now be described in detail in the following Examples. Syntheses S1-S10: Alkyl polysaccharides [0038] A 500 mL round-bottomed reactor was placed in an aluminum heating block and fitted with a 25 mL Dean-Stark trap (containing 15 mL hexanes) and a magnetic stir bar. To the reactor was added sugar (A g, 200 mmol) and n-butanol (B mL, 1.2 mol, 6 equiv) as noted in TABLE 1. The reactor contents were then stirred vigorously under a nitrogen blanket (bubbler). To the stirring reactor contents was added para-toluenesulfonic acid monohydrate (C mg, 2.00 mmol, 1 mol%)(noted in TABLE 1) and the aluminum heating block set at temperature T¹ (noted in TABLE 1) and maintained at that temperature for 2 hours. The reactor contents were then allowed to cool to ambient temperature with continued stirring. Then alcohol (D, 600 mmol, 3 equiv) was added to the reactor contents. The type and amount of the alcohol added are reported in TABLE 1. The Dean-Stark trap was then replated with a still head and a condenser flask. The reactor contents were then vacuum distilled with the aluminum heating block set at temperature T² (noted in T^ABLE 1) and the condenser flask set in an ice-cooled bath. The vacuum was periodically adjusted to a flow rate of 1–2 ^{Attorney Docket No. 85429-WO-PCT} drops/second. The vacuum was maintained for 2 hours. The distillation was then stopped. The distillation apparatus was placed back under a nitrogen atmosphere and the stirred contents of the reactor were allowed to cool to ambient temperature. A solution of sodium hydroxide (120 µL, 50 wt% in water, 2.2 mmol) was added to the stirring reactor contents. After vigorous stirring, the pH was measured (pH paper) to ensure the reactor contents were basic. A 30 mL sample of the reactor contents was diluted with hexanes (30 mL) and purified via automated column chromatography (silica, 220 g). The alcohol eluted at 20/80 ethyl acetate/hexanes. The solvent mixture was then ramped over 2 column volumes to 100% ethyl acetate. The solvent system was then changed to ethyl acetate-methanol, and the solvent ratio was ramped over 6 column volumes to neat methanol – during which time the product eluted as a mixture of mono- and polysaccharides. The solvent was removed under reduced pressure to give the final product. T^ABLE 1 Sugar Alcohol Temp. (° C) Ex. Type A (g) B (mL) C (mg) Type D T¹ T² [0039] Aqueous surfactant formulations were prepared having composition according to Comparative Examples CF1-CF5 and Examples F1-F3 as noted in TABLE 2.

^{Attorney Docket No. 85429-WO-PCT} TABLE 2 Example (wt%) Ingredient CF1 CF2 CF3 CF4 CF5 F1 F2 F3 .0 5 5 [0040] The thickening performance of the aqueous surfactant thickening performance of the alkyl polysaccharides of Syntheses S2-S4 and S8-S10 was assessed by measuring the viscosity of the aqueous surfactant formulations prepared according to Comparative Examples CF1-CF5 and Examples F1-F3, respectively. The viscosities reported in T^ABLE 3 were measured by using the Total Aspiration and Dispense Monitoring (TADM) function on a Hamilton MicroLab Star liquid handling robot at 21 °C. The Hamilton aspirates and dispenses the samples at a set speed, and monitors the pressure changes (∆p). Calibration curves are generated using known viscosity standards. And viscosity is calculated by comparing the pressure curves of the samples against the pressure curves of viscosity standards. The data collected by TADM method was the ∆p value in pascals (Pa). The viscosity was calculated from the measured ∆p according to the formula: Viscosity = 0.3461 × ∆p - 115.44. T^ABLE 3 Aqueous surfactant formulation Alkyl polysaccharide Viscosity (cP) ^{Attorney Docket No. 85429-WO-PCT} Comparative Examples CF6-CF8 and Examples F4-F6: Aqueous formulations [0041] Aqueous surfactant formulations were prepared having composition according to Comparative Examples CF6-CF8 and Examples F4-F6 as noted in TABLE 4. TABLE 4 Example (wt%) Ingredient CF6 CF7 CF8 F4 F5 F6 5 5 [0042] Thickening performance of linear alkyl polyglucoside and linear alkyl polyxyloside compared in various aqueous sulfate free surfactant systems. The viscosities reported in TABLE 5 were measured by using the Total Aspiration and Dispense Monitoring (TADM) function on a Hamilton MicroLab Star liquid handling robot at 21 °C. The Hamilton aspirates and dispenses the samples at a set speed, and monitors the pressure changes (∆p). Calibration curves are generated using known viscosity standards. And viscosity is calculated by comparing the pressure curves of the samples against the pressure curves of viscosity standards. The data collected by TADM method was the ∆p value in pascals (Pa). The viscosity was calculated from the measured ∆p according to the formula: Viscosity = 0.3461 × ∆p - 115.44. T^ABLE 5 Aqueous surfactant formulation Alkyl polysaccharide Viscosity (cP) ^ns [0043] Aqueous surfactant formulations were prepared having composition according to Comparative Examples CF9-CF12 and Examples F7-8 as noted in TABLE 6. ^{Attorney Docket No. 85429-WO-PCT} TABLE 6 Example (wt%) Ingredient CF9 CF10 CF11 CF12 F7 F8 1 5 5 5 [0044] Thickening performance of linear alkyl polyglucoside and linear alkyl polyxyloside compared in various aqueous sulfate free surfactant systems. The viscosities reported in TABLE 7 were measured by using the Total Aspiration and Dispense Monitoring (TADM) function on a Hamilton MicroLab Star liquid handling robot at 21 °C. The Hamilton aspirates and dispenses the samples at a set speed, and monitors the pressure changes (∆p). Calibration curves are generated using known viscosity standards. And viscosity is calculated by comparing the pressure curves of the samples against the pressure curves of viscosity standards. The data collected by TADM method was the ∆p value in pascals (Pa). The viscosity was calculated from the measured ∆p according to the formula: Viscosity = 0.3461 × ∆p - 115.44. TABLE 7 Aqueous surfactant formulation Alkyl polysaccharide Viscosity (cP) E l F 12 ^ns [0045] Aqueous surfactant formulations were prepared having composition according to Comparative Examples CF13-CF14 and Examples F9-10 as noted in TABLE 8. ^{Attorney Docket No. 85429-WO-PCT} TABLE 8 Example (wt%) Ingredient CF13 CF14 F9 F10 1 [0046] Thickening performance of linear alkyl polyglucoside and linear alkyl polyxyloside compared in various aqueous sulfate free surfactant systems. The viscosities reported in TABLE 9 were measured by using the Total Aspiration and Dispense Monitoring (TADM) function on a Hamilton MicroLab Star liquid handling robot at 21 °C. The Hamilton aspirates and dispenses the samples at a set speed, and monitors the pressure changes (∆p). Calibration curves are generated using known viscosity standards. And viscosity is calculated by comparing the pressure curves of the samples against the pressure curves of viscosity standards. The data collected by TADM method was the ∆p value in pascals (Pa). The viscosity was calculated from the measured ∆p according to the formula: Viscosity = 0.3461 × ∆p - 115.44. T^ABLE 9 Aqueous surfactant formulation Alkyl polysaccharide Viscosity (cP) ns [0047] Aqueous surfactant formulations were prepared having composition according to Comparative Examples CF15-CF17 and Examples F11-13 as noted in T^ABLE 10.

^{Attorney Docket No. 85429-WO-PCT} TABLE 10 Example (wt%) Ingredient CF9 CF10 CF11 CF12 F7 F8 1 25 0 5 [0048] Thickening performance of linear alkyl polyglucosides and linear alkyl polyxylosides compared in various aqueous sulfate free surfactant systems. The viscosities reported in T^ABLE 11 were measured by using the Total Aspiration and Dispense Monitoring (TADM) function on a Hamilton MicroLab Star liquid handling robot at 21 °C. The Hamilton aspirates and dispenses the samples at a set speed, and monitors the pressure changes (∆p). Calibration curves are generated using known viscosity standards. And viscosity is calculated by comparing the pressure curves of the samples against the pressure curves of viscosity standards. The data collected by TADM method was the ∆p value in pascals (Pa). The viscosity was calculated from the measured ∆p according to the formula: Viscosity = 0.3461 × ∆p - 115.44. TABLE 11 Aqueous surfactant formulation Alkyl polysaccharide Viscosity (cP) ns [0049] Aqueous surfactant formulations were prepared having composition according to Comparative Examples CF18-CF21 and Examples F14-15 as noted in T^ABLE 12. ^{Attorney Docket No. 85429-WO-PCT} TABLE 12 Example (wt%) Ingredient CF18 CF19 CF20 CF21 F14 F15 0 [0050 ] Thickening performance of linear alkyl polyglucosides and linear alkyl polyxylosides compared in various aqueous sulfate free surfactant systems. The viscosities reported in TABLE 13 were measured by using the Total Aspiration and Dispense Monitoring (TADM) function on a Hamilton MicroLab Star liquid handling robot at 21 °C. The Hamilton aspirates and dispenses the samples at a set speed, and monitors the pressure changes (∆p). Calibration curves are generated using known viscosity standards. And viscosity is calculated by comparing the pressure curves of the samples against the pressure curves of viscosity standards. The data collected by TADM method was the ∆p value in pascals (Pa). The viscosity was calculated from the measured ∆p according to the formula: Viscosity = 0.3461 × ∆p - 115.44. T^ABLE 13 Aqueous surfactant formulation Alkyl polysaccharide Viscosity (cP) C E l CF18 N 17

Claims

^{Attorney Docket No. 85429-WO-PCT} We claim: 1. An aqueous personal care rinse off formulation comprising: a dermatologically acceptable aqueous vehicle; a dermatologically acceptable cleaning surfactant, wherein the dermatologically acceptable cleaning surfactant comprises an anionic surfactant; and an alkyl polysaccharide thickener; wherein the alkyl polysaccharide thickener comprises 50 to 100 wt%, based on weight of the alkyl polysaccharide thickener, of a linear alkyl polysaccharide of formula A R-O-(S)nH (A) wherein R is a linear C_9-15 alkyl group; wherein n is an average of 1 to 2.5; wherein S is a monosaccharide selected from the group consisting of ribulose, xylulose, ribose, arabinose, xylose, lyxose and mixtures thereof; and wherein 70 to 100 wt% of the monosaccharide S, based on weight of monosaccharide S in the linear alkyl polysaccharide of formula A, is xylose; with the proviso that the alkyl polysaccharide thickener comprises < 15 wt%, based on weight of the alkyl polysaccharide thickener, of branched alkyl polysaccharide of formula I (I) wherein R¹ is a linear or alkyl group; wherein G¹ is a monosaccharide with 4 to 6 carbon atoms and wherein x is 1.1 to 4; with the proviso that the alkyl polysaccharide thickener comprises < 1.5 wt%, based on weight of the alkyl polysaccharide thickener, of branched alkylpolysaccharide of formula II R³-(OG²)_y (II) wherein R³ is an alkyl or alkenyl moiety containing 7 to 30 carbon atoms with branching at the 2 or higher carbon position on R³, wherein the branching is selected from the group consisting of methyl, ethyl, isopropyl, n-propyl, butyl, pentyl, hexyl and mixtures thereof; wherein G² is a saccharide moiety selected from the group consisting of glucose, fructose, ^{Attorney Docket No. 85429-WO-PCT} mannose, galactose, talose, gulose, allose, altrose, idose, arabinose, xylose, lyxose, ribose and mixtures thereof and wherein y is an average of ≥ 2; with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt%, based on weight of the aqueous personal care rinse off formulation, of alkyl sulfate surfactant; and with the proviso that the aqueous personal care rinse off formulation comprises < 0.01 wt%, based on weight of the aqueous personal care rinse off formulation, of alkyl ether sulfate surfactant. 2. The aqueous personal care rinse off formulation of claim 1, wherein the anionic surfactant is selected from the group consisting of glycinates, taurates, glutamates, sarcosinates, isethionates, sulfoacetates, alaninates, sulfonates, succinates, carboxylates and mixtures thereof. 3. The aqueous personal care rinse off formulation of claim 2, wherein the dermatologically acceptable cleaning surfactant further comprises a amphoteric surfactant. 4. The aqueous personal care rinse off formulation of claim 3, wherein the amphoteric surfactant is selected from the group consisting of betaines, amphoacetates, sultaines and mixtures thereof. 5. The aqueous personal care rinse off formulation of claim 4, wherein the anionic surfactant is selected from the group consisting of glycinates, sarcosinates, isethionates, alaninates, sulfonates and mixtures thereof; and wherein the amphoteric surfactant comprises cocamidopropyl betaine. 6. The aqueous personal care rinse off formulation of claim 5, wherein R is a linear C_10-12 alkyl group. 7. The aqueous personal care rinse off formulation of claim 1, wherein the aqueous personal care rinse off formulation has a viscosity > 1,500 cP at 21 °C. 8. The aqueous personal care rinse off formulation of claim 7, further comprising an ingredient selected from the group consisting of an absorbent, an aesthetic enhancer, an alpha hydroxy acid, an antiaging agent, an antidandruff agent, an antifungal, an antimicrobial agent, an antioxidant, an antiseptic, an antistatic agent, a bioactive agent, a bleaching agent, a chelating agent, a colorant, a conditioning agent, a dye, an emollient, an emulsifying agent, a film former, a fixative polymer, a foaming agent, a fragrance, a hard particle, a humectant, a lubricating agent, an opacifier, a pearlizing agent, a penetrant, a pH adjusting agent, a pigment, a plant extract, a preservative, a protein/amino acid, a rheology modifier, a salt, a ^{Attorney Docket No. 85429-WO-PCT} sensory modifier, a slip agent, a soap, a soft particle, a sunscreen additive, a suspending agent, a UV light inhibitor, a vitamin and mixtures thereof. 9. The aqueous personal care rinse off formulation of claim 8, wherein the aqueous personal care rinse off formulation is selected from the group consisting of a shampoo, a conditioning shampoo, a body wash formulation, an exfoliating body wash formulation, a facial wash formulation, an exfoliating facial wash formulation, a liquid hand soap formulation, a mild cleansing formulation. 10. A method of cleaning at least one of mammalian skin and hair, comprising: applying an aqueous personal care rinse off formulation according to claim 1 to the skin or hair of a mammal; and rinsing the aqueous personal care rinse off formulation from the skin or hair with a rinse water.