Biphasic wash composition

Abstract

A biphasic composition comprising: I. an aqueous phase comprising: a. anionic surfactant having; j) a first anionic surfactant comprising an anionic saccharide-based surfactant or an anionic saccharide-based surfactant, and a C10-C20 lactylate, a C10-C20 glycolate or both and with the proviso that when the lactylate, glycolate or both and saccharide-based surfactants are present, the first anionic surfactant is at least 40% by weight anionic saccharride-based surfactant based on total weight of the first anionic surfactant; ii) a second anionic surfactant comprising a furan-based anionic sulphate free surfactant; which comprises: A) a head group comprising Ai) a furan ring Aii) a sulphonate group directly attached to the furan ring; wherein the furan-based anionic sulphate free surfactant has the structure of Formula (I): Formula (I) where R is a hydrophobic alkyl tail group having a carbon chain length of 8 to 18, 18:1 and 18:2 where R groups of different chain lengths can be used in combination as a blend, preferably a blend of chain lengths of C12 and C14 and X is a counterion, selected from organic and inorganic counterions; B) an amide containing linker group; and C) a hydrophobic alkyl tail group having a carbon chain length of 8 to 18; viii) amphoteric surfactant, zwitterionic surfactant or both; ix) 5 to 17%, and preferably, 7 to 16%, and most preferably, 7.5 to 15% (or from 8 to 15% or from 9 to 14.5% or from 9.5 to 13.5%) by weight of solvent comprising from 83 to 100% by weight C3 to C10 diol based on total weight of the solvent; x) optionally a thickener; and xi) 8 to 40%, and preferably, from 10 to 35%, and most preferably, from 11 to 32% (or 12 to 31% or 12 to 30% or 12 to 29%) by weight water; and xii) from 0.0 to 8% by weight of a C8 to C18, and preferably, C10 to C16, and most preferably, C12 to C14 fatty acid, fatty alcohol, fatty amide or mixture thereof; and II. an oil phase comprising: at least 92.5%, and preferably, 93 to 100% and most preferably, from 94 to 100% by weight oil or from 94 to 99% or from 95 to 98% by weight oil or 100% by weight oil that is clear at a temperature from -21°C to 35°C, and preferably, from -20°C to 35°C, and most preferably, from -18°C to 35°C or from -17°C to 35°C or from -17 to 30°C or from -16 to 28°C wherein the aqueous phase has a pH greater than 5.7 to 8, and the biphasic composition comprises at least 3.3 to 9.5% by weight of the first anionic surfactant, and from 7.5 to 18.5%, and preferably, from 7.7 to 18%, and most preferably, from 8 to 18% or from 8.2 to 18% or from 11 to 18% or from 12 to 18% or from 13 to 18% total surfactant based on total weight of the biphasic composition and further wherein the aqueous phase and the oil phase each, independently, make up from 30 to 70% by weight of the biphasic composition. The biphasic wash composition with agitation yields a transient emulsion which is a wash composition that delivers lather and moisturization benefits even when comprising at least 30% by weight oil.

Description

[0001] BIPHASIC WASH COMPOSITION

[0002] Field of the Invention

[0003] The present invention is directed to a biphasic wash composition. More particularly, the biphasic wash composition has an aqueous phase and an oil phase where each phase, independently, makes up from 30 to 70% by weight of the total weight of the biphasic wash composition. The aqueous and oil phases are substantially transparent, and surprisingly, yield an opaque and transient emulsion after being mixed. The resulting transient emulsion, which comprises at least 30% by weight oil, unexpectedly produces excellent lather characteristics when used for washing while simultaneously delivering consumer desired moisturizing benefits.

[0004] Background of the Invention

[0005] Liquid based cleansing compositions, such as shampoos and body washes, are common and enjoyed by many consumers. Such compositions typically have water as the predominant ingredient, and they are often sold in plastic bottles, sachets or tubes. The compositions are conventionally formulated to have components and characteristics that are not only customary but also required by consumers purchasing the cleansing compositions.

[0006] Traditional cleansing wash compositions are water continuous emulsions, typically having materials of uniform physical properties in every direction (isotropic washes) or composed of fine alternating layers of different components in the form of lamellae (lamellar washes). Formulating wash compositions with multiple actives, including both water and oil soluble actives, in a continuous emulsion can be difficult due to many factors such as the compatibility of the actives used, temperature fluctuations, pH of the carrier liquid, water activity and viscosity requirements. Further, consumers find it difficult to differentiate between traditional products that are continuous emulsions and such products, devoid of visual cues, do not offer consumers a brand experience often needed and enjoyed for customer loyalty.

[0007] In addition, traditional water continuous wash products with oil (i.e. , even having oil as low as 10% by weight of the wash), often do not lather well, and are therefore, not desired by consumers that want wash compositions with moisturizing benefits and customary lathering characteristics.

[0008] It is of increasing interest to develop a biphasic wash composition with stable phases that are easy to mix and that can result in a transient emulsion that delivers not only excellent moisturizing benefits but also excellent lather characteristics when used in washing applications.

[0009] The present invention, therefore, is directed to a biphasic wash composition that has an aqueous phase and an oil phase where each phase, independently, makes up from 30 to 70% by weight of the total weight of the biphasic wash composition. The aqueous and oil phases are substantially transparent, and surprisingly, yield an opaque and transient emulsion after being mixed. The resulting transient emulsion, which comprises at least 30% by weight oil, unexpectedly produces excellent lather characteristics when used for washing. Each of the phases and the resulting transient emulsion are suitable to be formulated substantially free of at least one of sulfate-based surfactants.

[0010] Efforts have been disclosed for making wash compositions. In U.S. Patent No. 6,627,209, compositions with polydextrose in combination with sucrose for biphasic liquid formation are described.

[0011] Further efforts have been disclosed for making wash compositions. In U.S. Patent No. 7,220,713, wash compositions with low amounts of high molecular weight polymers for enhancing viscosity of aqueous biphasic liquids are described.

[0012] Additional efforts have been disclosed for making biphasic compositions. In U.S. Patent No. 9,433,564, a biphasic non-emulsion cosmetic composition with a hydrophobic liquid phase and a hydrophilic liquid phase is described.

[0013] D1 (US2022023160 A1) discloses an oil-water separating composition with a water phase and an oil phase which separates from the water phase in a stationary state. The oil-water separating composition contains 0.05-5 mass percent of a polyol derivative relative to the mass of the composition. The polyol derivative is at least one of a glycerin derivative and a glycol derivative. WO2020229158 A1 discloses a furan-based surfactant comprising a beta sulphonate head group, a furan and a C10-20 hydrophobic group which is either attached directly to the furan or by way of a linker.

[0014] D3 (WO2022228806) discloses a biphasic cosmetic composition, comprising fatty alcohol polyoxyalkylene ether, wherein two separate phases are present as an emulsion phase and a clear aqueous phase, and preferably the fatty alcohol polyoxyalkylene ether is present in an amount of from 0.001 to 1.0 wt percent, based on the total weight of the biphasic cosmetic composition.

[0015] D4 (Mintel_Fresh Bamboo Bodywash_XP93231809A) discloses a body wash comprising disodium coco-glucoside citrate and sodium lauroyl lactylate, CAPB, carbomer, water and oils.

[0016] None of the additional information describes a biphasic wash composition as described and claimed herein.

[0017] Summary of the Invention

[0018] In a first aspect, the present invention is directed to a biphasic composition comprising:

[0019] I. an aqueous phase comprising: a. anionic surfactant having; i) a first anionic surfactant comprising an anionic saccharide-based surfactant or an anionic saccharide-based surfactant, and a C10-C20 lactylate, a C10-C20 glycolate or both and with the proviso that when the lactylate, glycolate or both and saccharide-based surfactants are present, the first anionic surfactant is at least 40% by weight anionic saccharide-based surfactant based on total weight of the first anionic surfactant; ii) a second anionic surfactant, which is a furan-based anionic sulphate free surfactant; wherein the furan-based anionic sulphate free surfactant comprises:

[0020] A) a head group comprising i) a furan ring ii) a sulphonate group directly attached to the furan ring; wherein the furan-based anionic sulphate free surfactant has the structure of Formula (I):

[0021] Formula (I) where R is a hydrophobic alkyl tail group having a carbon chain length of 8 to 18, 18:1 and 18:2 where R groups of different chain lengths can be used in combination as a blend, preferably a blend of chain lengths of C12 and C14 and X is a counterion, selected from organic and inorganic counterions;

[0022] B) an amide containing linker group; and

[0023] C) a hydrophobic alkyl tail group having a carbon chain length of 8 to 18; iii) a co-surfactant selected from an amphoteric surfactant a zwitterionic surfactant and mixtures thereof; iv) 5 to 17%, and preferably, 7 to 16%, and most preferably, 7.5 to 15% (or from 8 to 15% or from 9 to 14.5% or from 9.5 to 13.5%) by weight of solvent comprising from 83 to 100% by weight C3 to C10 diol based on total weight of the solvent; v) optionally a thickener; and vi) 8 to 40%, and preferably, from 10 to 35%, and most preferably, from 11 to 32% (or 12 to 31 % or 12 to 30% or 12 to 29%) by weight water; and vii) from 0.0 to 8% by weight of a Cs to Cis, and preferably, C10 to C16, and most preferably, C12 to C14 fatty acid, fatty alcohol, fatty amide or mixture thereof; and

[0024] II. an oil phase comprising: at least 92.5%, and preferably, 93 to 100% and most preferably, from 94 to 100% by weight oil or from 94 to 99% or from 95 to 98% by weight oil or 100% by weight oil that is clear at a temperature from -21 °C to 35°C, and preferably, from -20°C to 35°C, and most preferably, from -18°C to 35°C or from -17°C to 35°C or from -17 to 30°C or from -16 to 28°C wherein the aqueous phase has a pH greater than 5.7 to 8, and the biphasic composition comprises at least 3.3 to 9.5% by weight of the first anionic surfactant, and from 7.5 to 18.5%, and preferably, from 7.7 to 18%, and most preferably, from 8 to 18% or from 8.2 to 18% or from 11 to 18% or from 12 to 18% or from 13 to 18% total surfactant based on total weight of the biphasic composition and further wherein the aqueous phase and the oil phase each, independently, make up from 30 to 70% by weight of the biphasic composition. In a second aspect, the present invention is directed to a biphasic composition comprising:

[0025] I. an aqueous phase comprising: a) anionic surfactant having: i) a first anionic surfactant comprising an anionic saccharide-based surfactant, or an anionic saccharide-based surfactant, and a C10-C20 lactylate, a C10-C20 glycolate or a mixture thereof with the proviso that when lactylate, glycolate or both and saccharide-based surfactants are present, the first anionic surfactant is at least 40% by weight anionic sacharride-based surfactant based on total weight of the first anionic surfactant; ii) 1 to 6.75% by weight of a second anionic surfactant, which a furan-based anionic sulphate free surfactant as defined in the first aspect; iii) amphoteric surfactant, zwitterionic surfactant or both; iv) 5 to 17%, and preferably, 7 to 16%, and most preferably, 7.5 to 15% (or from 8 to 15% or from 9 to 14.5% or from 9.5 to 13.5%) by weight of solvent comprising from 83 to 100% by weight C3 to C10 diol based on total weight of the solvent; v) optionally a thickener; vi) 8 to 40%, and preferably, from 10 to 35%, and most preferably, from 11 to 32% (or 12 to 31 % or 12 to 30% or 12 to 29%) by weight water; vii) from 0.0 to 8% by weight of a Cs to Cis, and preferably, C10 to C16, and most preferably, C12 to C14 fatty acid, fatty alcohol, fatty amide or mixture thereof; and

[0026] II. an oil phase comprising: at least 92.5%, and preferably, 93 to 100% and most preferably, from 94 to 100% by weight oil or from 94 to 99% or from 95 to 98% by weight oil or 100% by weight oil that is clear at a temperature from -21°C to 35°C, and preferably, from -20°C to 35°C, and most preferably, from -18°C to 35°C or from -17°C to 35°C or from -17 to 30°C or from -16 to 28°C wherein the aqueous phase has a pH greater than 5.7 to 8, and the biphasic composition comprises at least 3.3 to 9.5% by weight of the first anionic surfactant, and from 7.5 to 18.5%, and preferably, from 7.7 to 18%, and most preferably, from 8 to 18% or from 8.2 to 18% or from 11 to 18% or from 12 to 18% or from 13 to 18% total surfactant based on total weight of the biphasic composition and further wherein the aqueous phase and the oil phase each, independently, make up from 30 to 70% by weight of the biphasic composition. The biphasic composition comprises from 0 to less than 2% by weight of a sulfate based surfactant and comprises less than 75 ppm of a dioxane. In a third aspect, the invention is directed to a method for making an end use wash composition comprising the steps of: a) combining the aqueous phase and oil phase of the biphasic composition according to the first or second aspect of the invention; and b) generating a translucent or opaque transient emulsion, transient emulsion being an end use wash composition that returns to a biphasic composition when at rest for a period from 3 minutes to 1 day, or from 4 minutes to 5 hours or from 5 minutes to 2 hours or from 5 minutes to 1 hour, or from 5 to 30 minutes, or from 7 to 25 minutes or in 8 to 20 minutes (or 8.5 to 18 minutes or 9.5 to 17 minutes).

[0027] In a fourth aspect, the invention is directed to the use of an oil phase and an aqueous phase comprising a furan-based anionic sulphate free surfactant, and a betaine, and an anionic saccharide-based surfactant, or anionic saccharide-based surfactant and C10-C20 lactylate to produce a biphasic composition that is suitable to agitate to produce a wash composition which is a transient emulsion.

[0028] Biphasic, as used herein to describe the composition of the present invention, means a composition having two phases or sub-compositions, and particularly, a distinct aqueous and an oil phase. Transient emulsion means a temporary emulsion made by moderately (including by hand) mixing, agitating, shearing, shaking or swirling (or the like) the described aqueous and oil phases (i.e., the biphasic composition for 5 seconds to 3.5 minutes, and preferably, from 10 seconds to 2.5 minutes, and most preferably, from 20 seconds to 1.5 minutes or from 30 seconds to 1 minute where moderately means not requiring a mechanical device) whereby the transient emulsion is water continuous and opaque and reverts to a biphasic composition in 1 day or less. Substantially transparent, as used herein, means at least 80%, or at least 85% or at least 90% or 90 to 99% or 90 to 97% or 90 to 95% of the light in contact with a phase (e.g., the aqueous and oil phases of the invention) passes through. In an embodiment of the invention, 98 to 100% or 100% of light passes through the aqueous phase and / or oil phase of the invention. Therefore, the phases can be clear.

[0029] Aqueous phase means a phase having at least 8% by weight to 40% by weight water based on total weight of the aqueous phase where such phase is not miscible with an oil phase. Oil phase as used herein means a phase having at least 92.5% by weight oil and not miscible with a water phase. Skin, as used herein, is meant to include skin on the arms (including underarms), face, feet, neck, chest, hands, legs, buttocks, nails and scalp (including hair). Polyol means 3 or more hydroxy groups such as a triol, tetraol or hexol and not a diol used as solvent. The transient emulsion is an end use wash composition that is creamy, not sticky or draggy, and typically mimics a lotion in consistency. Such an end use wash composition surprisingly provides excellent lather and moisturizing attributes when used. The end use composition of the invention is translucent or opaque, meaning less than 50% (or less than 30% or less than 25% or less than 20% or from 0 to 15% or 0.0%) of light passes through the end use composition (i.e., transient emulsion). The end use composition is homogeneous prior to the phases it is made from starting to separate, free of syneresis and precipitate / particle formation that can lead to a grainy sensation while using. Typically, the aqueous phase and oil phase of the present invention each independently have a viscosity from 25 to 7,000 cps (or from 50 to 5,000 cps or from 60 to 4,000 cps, or from 70 to 3,000 cps, where 1 Pa-s is equal to 1000 cps). The aqueous phase may optionally comprise a thickener, as later defined, including those classified as a polymer with a cellulosic backbone. Thickener is desired to control and increase the time it takes for the transient emulsion to revert to being biphasic. The end use composition is one suitable to be wiped or washed off, and preferably, washed off with water. The end use composition can be a home care cleaning composition but is preferably a shampoo, make-up remover, facial wash, hand wash or personal care liquid body wash. In an embodiment of the invention, the end use composition can have a viscosity from at least 50 to 235,000 cps, and preferably, from 100 to 225,000 cps, and most preferably, from 200 to 210,000 cps (or from 500 to 205,000 cps, or from 2,000 to 200,000 cps, or from 4,000 to 180,000 cps or from 10,000 to 165,000 cps). The end use composition may optionally comprise medicinal or therapeutic agents, but preferably, is a wash which is cosmetic and non-therapeutic such that the wash removes water soluble and water insoluble soils. In one embodiment of the invention, the end use composition is a home care composition like a table-top or toilet cleaning composition. In another embodiment, the end use composition is a shampoo composition. In still another embodiment, the end use composition is a personal wash composition, and therefore, a liquid body wash. As hereinafter described, the end use composition of the present invention may optionally comprise skin benefit ingredients added thereto such as emollients, vitamins and / or derivatives thereof, resorcinols, retinoic acid precursors, colorants, moisturizers, sunscreens, mixtures thereof or the like. The skin benefit ingredients (or agents) may be water or oil soluble. If used, oil soluble skin benefit agents typically make up to 3.5% by weight of the oil phase whereby water-soluble skin benefit agents, when used, typically make up to 10% by weight of the aqueous phase of the present invention. The aqueous phase and end use composition typically have a pH greater than 5.75 to 8.5, preferably over 5.85 to 7.5, and most preferably, from 6 to 7 or from 6.1 to 6.9 or from 6.2 to 6.8. Viscosity, unless noted otherwise, is taken with a Discovery HR-2 Rheometer using sand blasted plates with a 1000-micron gap and having a shear rate of 0.1-15 s'1. Viscosity is measured at 25°C. Stable, as used herein, means not displaying precipitate, flocculation or visible color change for at least 2 months, and preferably, 3 to 4 months when stored at 25°C. As used herein, “substantially free of means less than 2.0% by weight of the end use composition, and preferably, less than 1.5% by weight, and most preferably, less than 1.0% by weight or less than 0.85% or less than 0.5% or less than 0.25% or less than 0.15% or less than 0.1% or less than 0.05% or 0.0% (none) based on total weight of the of the end use composition. In the case of dioxanes, like 1 ,4-dioxanes, substantially free of means less than 75 ppm, and preferably, less than 50 ppm, and most preferably, less than 25 ppm or less than 5 ppm or from 0.00001 to 2 ppm or less than 1 ppm or 0.0 (no) ppm dioxane based on total weight of dioxane in the end use composition. For the avoidance of doubt, transient emulsion, end use composition, end use wash composition and liquid personal wash composition are meant to be the same.

[0030] The term comprising is meant to encompass the terms consisting essentially of and consisting of. For the avoidance of doubt, and for illustration, the end use composition of this invention comprising surfactant, water and active is meant to include a composition consisting essentially of the same and a composition consisting of the same. All ranges defined are meant to include all ranges subsumed therein. Except in the operating comparative examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts or ratios of materials or conditions and / or physical properties of materials and / or use are to be understood as modified by the word “about”. The disclosure, as found herein, is to be considered to cover all embodiments as found in the claims as being multiply dependent upon each other irrespective of the fact that claims may be found without multiple dependency or redundancy. Detailed Description

[0031] As to the anionic saccharide-based surfactant suitable for use, the same is typically a mono-, di- or oligosaccharide (sugar) esterified with a moiety having a carboxylic acid group. In an embodiment of the invention, the anionic saccharide-based surfactant used has the formula:

[0032] I where: R is a C10-C20 alkyl, and preferably, a C12-C18 alkyl, and most preferably, a C14-C16 alkyl; m is 0 or 1 and n is 1 , 2, or 3; each R1and R2is independently a C1-C3 alkyl, H, or OH wherein both R1groups are not simultaneously OH and both R2groups are not simultaneously OH and further wherein when m is zero preferably one R1group and one R2group is OH; and X+is a counter ion that can include K+, Na+, NH4+or a mixture thereof.

[0033] In an embodiment of the invention, the anionic saccharide-based surfactant used is disodium cocoglucoside citrate, disodium cocoglucoside tartrate or a mixture thereof. The same are commercially available from suppliers like Lamberti Eucarol® brand name. As to the C10 -C20 lactylate (i.e., used optionally as a portion of the first anionic surfactant), the same can be a mono- or polylactyl or mixture thereof as lactic acid can, for example, undergo self-esterification. Therefore, C10-C20 lactylate suitable for use includes lactylic esters of fatty acids represented by the formula: where Rais a C9to C19hydrocarbon, each Rbis independently hydrogen or a C1-3 alkyl, u is an integer from 0 to 3 and Y+ is a counter ion that can include K+, Na+, NHY or a mixture thereof.

[0034] In an embodiment of the invention, the C10-C20 lactylate comprises 40 to 100%, and preferably, 50 to 95%, and most preferably, 60 to 90% (or 65 to 85% or 70 to 80%) by weight of a Ci2-C2o (orCi4-C2o orCi6-C2o or C16-C18) group (i.e., acyl portion) based on total weight of lactylate in the compositions. The preferred lactylates, when used, are C14-C20 lactylates, and more preferably, C16-C18 lactylates like palmitoyl-1-lactylate, stearoyl-1-lactylate or mixtures thereof. Polylactyls (typically numbering from two to three lactyl groups) are also suitable for use, like palmitoyl-2-lactylate, stearoyl-2-lactylate or mixtures thereof. In yet another embodiment of the invention, sodium lauroyl lactylate, sodium stearoyl lactylate or mixtures thereof are preferred. Fatty acid sources are typically vegetable, soy, coconut, and palm oil. In an embodiment of the invention, less than 75%, and preferably, less than 45%, and most preferably, less than 30% by weight of the lactylate used based on total weight of lactylate is derived from palm kernel oil. In another embodiment of the invention, from 0.001 to 40%, and preferably, from 0.01 to 35%, and most preferably, from 1 to 30% by weight of total lactylate used in the compositions is derived from palm kernel oil. In even another embodiment, the lactylate used is sodium stearoyl lactylate where less than 5% by weight (or 0.0% by weight) of the lactylate used is derived from palm kernel oil. In still another embodiment of the invention, anionic suitable for optional use is one where the Rbgroups are hydrogen and the anionic represented by formula (II) is a C10-C20 glycolate.

[0035] As described, when both the lactylate, glycolate or both, and anionic saccharide-based surfactants are present, the first anionic surfactant is at least 40% by weight anionic saccharide-based surfactant, and preferably, at least 45% by weight, and most preferably, from 45 to 99.5% (or from 45 to 95%, or from 48 to 80%, or from 48 to 70%) by weight anionic saccharide-based surfactant based on total weight of the first anionic surfactant in the aqueous phase. For the avoidance of doubt, the first anionic surfactant in the aqueous phase and end use composition can be 100% by weight anionic saccharide-based surfactant.

[0036] In an embodiment of the invention, the total amount of first anionic surfactant used in the aqueous phase is at least 1.5% by weight of the end use composition, and often from 2 to 12%, and preferably, from 2.2 to 11 % or from 2.2 to 10% (or from 2.4 to 10.5% or from 2.3 to 9% or from 4 to 9% or from 4.25 to 8.5%, or from 4.5 to 8.5% or from 4.7 to 8%) by weight of the biphasic composition.

[0037] As to the to the second anionic surfactant suitable for use, the same is limited only to the extent that it is one suitable for use in a consumer product. Illustrative example inlcudes a furan-based anionic sulphate free surfactant.

[0038] The furan-based anionic sulphate free surfactant

[0039] The head group

[0040] The head group comprises: i) a furan ring; and ii) a sulphonate group, directly attached to the furan ring; wherein the furan-based anionic sulphate free surfactant has the structure of Formula (I):

[0041] Formula (I) where R is a hydrophobic alkyl tail group having a carbon chain length of 8 to 18, 18:1 and 18:2 where R groups of different chain lengths can be used in combination as a blend, preferably a blend of chain lengths of C12 and C14 and X is a counterion, selected from organic and inorganic counterions.

[0042] The sulphonate group is directly attached to the furan ring.

[0043] There is no chemical unit (group or moiety), for example a methylene group (CH2), between the sulphonate group and the furan ring.

[0044] The furan-based anionic sulphate free surfactant can be readily derived from bio-mass.

[0045] The amide linker group

[0046] The linker group comprises an amide and a saturated hydrocarbon chain. The saturated hydrocarbon chain is preferably selected from an ethylene group and a methylene group, most preferably a methylene group (CH2).

[0047] The hydrophobic alkyl tail

[0048] The hydrophobic alkyl tail is an alkyl chain comprising a carbon chain length of 6 to 18, preferably from 8 to 16 carbon chains, most preferably from 10 to 14.

[0049] The hydrophobic alkyl chain can be linear or branched, preferably linear.

[0050] The hydrophobic alkyl chain can be saturated or unsaturated, preferably saturated. Preferred unsaturated chain include C18: 1 , C18:2 and C18:3, most preferred C18:1.

[0051] Blends of chain lengths may also be used, for example a blend of C12 and C14, preferably in a wt:wt ratio of 2: 1.

[0052] The anionic sulphate free surfactant has a structure as defined in Formula (I):

[0053] Formula (I) where R is a hydrophobic alkyl tail group having a carbon chain length of from 8 to 18, preferably from 8 to 16 carbon chains, most preferably from 10 to 14; and where X is a counterion, suitably selected from organic and inorganic counterions. The counterion may be a proton.

[0054] Preferred counterions include alkali metals, especially sodium and potassium, and ammonium and triethanolammonium cations.

[0055] Method of making furan-based sulphate free anionic surfactant

[0056] The furan-based sulphate free anionic surfactant of the present invention may be made by any suitable process. Examples of a suitable process is as follows.

[0057] Amidation reaction: Furfurylamine (1 eq) and triethylamine (1.1 eq) were mixed in ethyl acetate (6 g / 100 ml) at 0 °C. The acyl chloride (1.05 eq) was then added dropwise. After complete addition, the mixture was heated to 70 °C and stirred for 16h. TLC (EtOAc:PE 2:1 , PM DA stain) showed a new spot with Rf = 0.5 and consumption of starting furfurylamine. Water was added to quench, the crude was filtered hot and the solid precipitate was washed with further hot ethyl acetate. The filtrate was evaporated to dryness, affording the corresponding furfurylamide as an off-white solid (82-99%). N-(furan-2-ylmethyl)dodecanamide. Using furfurylamine (15 g), dodecanoyl chloride (38.5 ml) and triethylamine (4.0 ml). Pale yellow solid, 99% yield.1H NMR (MeOD), 5 (ppm): 7.40, dd, 1 H, J = 0.8 and 1.8 Hz; 6.33-6.32, m, 1 H; 6.22, dd, 1 H, J = 0.8 and 3.1 Hz;

[0058] 4.33, s, 2 H; 2.19, t, 2 H, J = 7.0 Hz; 1.61-1.58, m, 2 H; 1.31-1.28, m, 16 H; 0.90, t, 1 H, J = 6.7 Hz.

[0059] Sulfonation reaction: Furfurylamide (1 eq) was dissolved in acetonitrile (20 g / 100 ml) at 0 °C. Chlorosulfonic acid (3 eq) was then added dropwise. After complete addition, the reaction was warmed up to RT and stirred for 3h.1H NMR (MeOD) showed disappearance of the proton at 7.4 ppm, corresponding to C4-H in the furan ring, confirming substitution at this position. Water was carefully added, followed by NaOH (50% in water) until pH 8. Most of the solvent was removed in vacuo and the residue was resuspended in acetone. The solid precipitate was collected, washed with hot acetone, dried and subjected to soxhlet extraction in methanol for 48h. This solution was then treated with activated carbon at reflux for 3h. The filtrate was evaporated to dryness, affording the corresponding sulphonated product as a pale-yellow solid (62-76%). 5-(dodecanamidomethyl)furan-2-sulfonate. Using / V-(furan-2-ylmethyl)dodecanamide (40 g) and chlorosulfonic acid (24 ml). Off-white solid, 65% yield.1H NMR (DMSO-de), 5 (ppm): 8.28, t, 1 H, J = 5.6 Hz; 6.28, d, 1 H, J = 3.2 Hz; 6.08, d, 1 H, J = 3.2 Hz; 4.20, d, 2 H, J = 5.6 Hz; 2.09, t, 2 H, J = 7.2 Hz; 1.52-1.45, m, 2 H; 1.27-1.24, m, 16 H; 0.85, t, 1 H, J = 6.7 Hz.

[0060] Preferably, the cleansing composition comprises an amount of furan-based anionic sulphate free surfactant of from 0.5 to 20 wt %, preferably from 1 to 15 wt %, more preferably from 2 to 12, even more preferably from 6 to 10, most preferably 3 to 8 wt %, by weight of total composition.

[0061] As to other anionic surfactants suitable to be selected for use, include C6-C20 acyl isethionates, C6-C20 acyl taurates, C6-C20 acyl glycinates, C6-C20 acyl glutamates. As to still other anionic surfactants suitable to be selected for use, these include alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, alpha-olefin sulfonates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, acyl sarcosinates or a mixture thereof (including any salts thereof).

[0062] As noted herein, compositions of the present invention are optionally, and preferably, substantially free of sulfate-based surfactants. In an embodiment of the invention sulfate- based surfactant may be used at an amount of less than 2% by weight of the total weight of the end use composition. If optionally included, the sulfate-based surfactants can include C8-C20 alkyl sulfates and / or C8-C20 alkyl ether sulfates. When selected, sodium lauryl sulfate, sodium lauryl ether sulfate, ammonium lauryl sulfate, ammonium lauryl ether sulfate, sodium pareth sulfate or a mixture thereof may be selected for use. As to those sulfate- based surfactants classified as alkyl ether sulfates, the ethoxy portion is typically from 1 to 3 ethoxy units in length, and often, from 2 to 3 ethoxy units in length.

[0063] As to the anionic sulfonates and their salts that may be selected for use (in addition to the anionic saccharide-based surfactant described herein), the same can include alkyl sulfonates, alkyl glyceryl ether sulfonates, alkyl alpha olefin sulfonates (hydrocarbons being an alkene, CxH2x, with a double bond in the alpha position) or a mixture thereof. Typically, the alkyl portion is from C8-C24, and preferably, from C10-C20, and more preferably, from C12 to G or from C12 to Cw or from C14 to Cw wherein the hydrophobic tail can be linear, unsaturated or branched.

[0064] Suitable succinates (including their salts) that may optionally be included in the compositions are those with a Cw to C20 hydrophobic portion. Illustrative examples include disodium oleamido MIPA sulfosuccinate, disodium oleamido MEA sulfosuccinate, disodium lauryl sulfosuccinate, disodium laureth sulfosuccinate, diammonium lauryl sulfosuccinate, diammonium laureth sulfosuccinate, dioctyl sodium sulfosuccinate, disodium oleamide MEA sulfosuccinate, sodium dialkyl sulfosuccinate, or a mixture thereof. For the avoidance of doubt, MIPA and MEA refer to monoisopropanolamine and monoethanolamine, respectively.

[0065] The acyl sarcosinates suitable for use include those having a C8-C20 or Cw-Cw or C12-C18 acyl group. Illustrative examples of the sarcosinates that may optional be used include sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, or a mixture thereof.

[0066] In an embodiment of the invention, at least one anionic surfactant that may be used is selected from sodium lauryl sulfosuccinate, sodium myristoyl sulfosuccinate, sodium cocoyl sulfosuccinate, sodium stearoyl sulfosuccinate, sodium laureth sulfosuccinate, sodium pareth sulfosuccinate, disodium laureth sulfosuccinate, disodium lauryl sulfosuccinate, diethylhexyl sodium sulfosuccinate or a mixture thereof.

[0067] In yet another embodiment, the anionic surfactant used in the composition can include sodium methyl 2-sulfolaurate or disodium 2-sulfolaurate or both.

[0068] Mixtures of any of the described anionic surfactants may be used with the anionic saccharide-based surfactant described herein, and the cation portion of their salts can include sodium, potassium and ammonium ions or mixtures thereof.

[0069] In an embodiment of the invention, the second anionic surfactant in the aqueous phase is preferably from 40 to 100%, and preferably, from 45 to 100%, and most preferably, from 47.5 to 100% (or from 45 to 75% or from 45 to 65%) by weight of a furan-based anionic sulphate free surfactant based on total weight of the second anionic surfactant in the aqueous phase.

[0070] In another embodiment, the second anionic surfactant will typically make up from 1 to 6.75%, and preferably, from 1.5 to 6.25% and most preferably, from 2 to 6% (or from 3 to 5.8% or from 3 to 5.5% by weight of the biphasic composition. Amphoteric surfactants may be included in the compositions. Illustrative examples include cocoyl amine oxide, lauramine oxide, myristamine oxide, palmitamine oxide, stearamine oxide, oleamine oxide, cocam idopropyl amine oxide, lauryl amidopropyl amine oxide, myristyl amidopropyl amine oxide, palmityl amidopropyl amine oxide, stearyl amidopropyl amine oxide, oleamidopropyl amine oxide or a mixture thereof.

[0071] Additional amphoteric surfactants suitable for optional use include imidazolines, sodium acyl amphoacetates, sodium acyl amphopropionates, disodium acyl amphodiacetates and disodium acyl amphodipropionates where the acyl (i.e. , alkanoyl group) can comprise a C7-C18 alkyl portion. Illustrative examples of the amphoteric surfactants suitable for use include sodium lauroamphoacetate, sodium cocoamphoacetate, sodium lauroamphoacetate, sodium cocoamphoacetate, cocamphodipropionate or a mixture thereof.

[0072] In an embodiment of the invention, when used, the amphoteric selected can optionally be at least 80%, and preferably, at least 85%, and most preferably, at least 90% (or 90 to 100% or 94 to 100% or 94 to 98% or 100%) by weight amine oxide whereby such amine oxide can have the formula: Rx-N+(Ry)2-O- where Rxis a C8-20 alkyl, and preferably, a C10-18 alkyl, and most preferably, a C12-18 alkyl (or C12-16 alkyl) and Ryis H or a C1-6 alkyl or CM alkyl or 'C1-3 alkyl or C1-2 alkyl or -CH3. In another embodiment of the invention, the preferred amine oxide selected is cocoyl amine oxide, lauramine oxide, myristamine oxide, palmitamine oxide, stearamine oxide, oleamine oxide or a mixture thereof.

[0073] The zwitterionic surfactants suitable for inclusion in the compositions of the present invention include those with at least one acid group. The acid group may be a carboxylic or a sulphonic acid group. They often include quaternary nitrogen, and therefore, can be quaternary amino acids. Such surfactants should generally include an alkyl or alkenyl group of 6 to 18 carbon atoms and generally comply with the overall structural formula:

[0074] R6-[-C(O)-NH(CH2)q-]r-N+-(R7-)(R8)A— B (IV) where R6is alkyl or alkenyl of 5 to 19 carbon atoms; R4and R5are each independently alkyl, hydroxyalkyl or carboxyalkyl of 1 to 3 carbon atoms; q is 2 to 4; r is 0 or 1 ; A is an alkylene of 1 to 3 carbon atoms optionally substituted with hydroxyl, whereby B is --CO2-- or -SO3-. Suitable zwitterionic surfactants that may be used in the present invention and within the above general formula include simple betaines of formula:

[0075] R3-N+-(R7)(R8)CH2CO2‘ (V) and amido betaines of formula:

[0076] R6— CONH(CH2)t— N+-(R7)(R8)CH2CO2- (VI) where t is 2 or 3.

[0077] In both formulae R6, R7and R8are as previously defined. R6would, in particular, include a mixture of C? to C17 alkyl groups and R7and R8are preferably methyl or ethyl groups, most preferably methyl groups. R3’ is Ce to C18.

[0078] A further option is that the zwitterionic surfactant is a sulphobetaine of the formula:

[0079] R3’ -N+-(R7)(R8)(CH2)3SO3- (VII) or

[0080] R6-CONH(CH2)U-N+-(R7)(R8)(CH2)3SO3- (VIII) where u is 2 or 3, or variants of these in which --(CH2)3SO3‘ is replaced by - CH2C(OH)(H)CH2SO3-.

[0081] In these formulae (VII and VIII), R3’, R6, R7and R8are as previously defined.

[0082] Illustrative examples of the zwitterionic surfactants suitable for use include betaines like lauryl betaine, laurylhydroxy sulfobetaine, lauryldimethyl betaine, coco betaine, cocoamidopropylhydroxylsulfo betaine, cocodimethyl carboxymethyl betaine, cocamidopropyl betaine, laurylamidopropyl betaine, cocodimethyl carboxymethyl betaine, mixtures thereof or the like.

[0083] Additional zwitterionic surfactants suitable for use include lauryl hydroxysultaine, cocamidopropyl hydroxy sultaine or mixtures thereof. Such surfactants are made commercially available, and it is within the scope of the invention to employ mixtures of the aforementioned surfactants. Even other zwitterionic surfactants that may be used in the present are C16-20 amidopropyl hydroxysultaines where the C16-20 amidopropyl hydroxysultaine is preferably palmityl, stearyl and / or oleyl amidopropyl hydroxysultaine, and most preferably, palmityl amidopropyl hydroxysultaine. Other suitable zwitterionic surfactants suitable for optional use include behenyl betaine, capryl / capramidopropyl betaine, stearyl betaine, myristyl hydroxysultaine, palmityl hrdroxysultaine, or a mixture thereof. In a preferred embodiment, the zwitterionic surfactant used in the compositions of this invention is cocam idopropyl betaine.

[0084] Zwitterionic surfactant or amphoteric surfactant or both (i.e., total weight of zwitterionic surfactant and amphoteric surfactant when both are used) typically makes up from 1.5 to 12%, and preferably, from 2 to 11%, and most preferably, from 2.2 to 10% (or from 2.4 to 9% or from 2.5 to 8.5% or from 4.5 to 8.5%) by weight of the biphasic composition.

[0085] In an embodiment of the invention, the total weight of zwitterionic surfactant and / or amphoteric surfactant the biphasic composition is at least 20%, and preferably, from 21 to 38%, and most preferably, from 22 to 35% or from 23 to 33% or from 24 to 33% or from 25 to 33% by weight of the total weight of surfactant in the biphasic composition.

[0086] In another embodiment of the invention, less than 95%, and preferably, less than 90%, and most preferably, less than 85% (or less than 80% or from 5 to 22% or from 6 to 20% or from 10 to 15%) by weight of the hydrophobic portion of the surfactants used in the present invention are recovered from petroleum, palm oil, palm kernel oil and / or coconut oil. In another embodiment, from 90 to 100% by weight of the hydrophobic portion of at least one surfactant used herein is not recovered from petroleum, palm oil, palm kernel oil and / or coconut oil.

[0087] In even another embodiment of the invention, from 0.0 to 15% or from 0.05 to 12% or from 0.5 to 10% by weight of any of the surfactants used in the compositions of the invention may have hydrophobic portion with carbon recovered from purple carbon, and that is, carbon recovered from carbon dioxide waste gas via biotechnology that utilizes microbial gas fermentation.

[0088] In yet another embodiment, at least 10% or at least 20%, and preferably, at least 30%, and most preferably, from 40 to 100%, or from 50 to 100% (or from 15 to 35% or 10 to 20%) by weight of the surfactants have hydrophobic chain recovered from triglycerides such as those recovered from jojoba, avocado, olive, and nuts, as well as from seed oil (e.g., sunflower, linseed, rapeseed), and especially, from soy bean oil. The solvent suitable for use in the compositions of the present invention are limited only to the extent such solvent may be included in topical wash compositions. Such a solvent comprises from 83 to 100% by weight C3 to C10 diol (or glycol), and preferably, from 85 to 100%, and most preferably, from 90 to 100% (or from 93 to 97% or from 93 to 98% or from 94 to 99.5% or 100%) by weight C3 to C10 diol whereby the biphasic composition comprises from 6.5 to 16%, and preferably, 7 to 16%, and most preferably, 7 to 14.5% (or from 8 to 14% or from 8.5 to 13.5% or from 9 to 13%) by weight of the solvent. Illustrative examples of the solvents suitable for use include propylene glycol, dipropylene glycol, polypropylene glycol (e.g., PPG-9), polyethylene glycol, butylene glycol, pentylene glycol, hexylene glycol, octylene glycol, 1 ,2-propanediol, 1 ,2-butanediol, 1 ,2-pentanediol, 1 ,2-hexanediol, 1 ,2- heptanediol, 1 ,2-octandiol or mixtures thereof. In an embodiment of the invention, the solvent used can be a mixture of propylene glycol and hexylene glycol at a weight ratio from 1 :6 to 6:1 or from 1 :5 to 5:1 or from 1 :4 to 4:1 or from 1 :3 to 3:1 or from 1 :2 to 2:1. In another embodiment, the solvent used is at least 80% or at least 90% or from 90 to 100% by weight hexylene glycol.

[0089] Conventional humectants may optionally be included as additives in the compositions of the present invention to assist in moisturizing skin when the resulting end use compositions (i.e. , transient emulsions) are made by combining the aqueous and oil phases. These materials are generally polyhydric alcohol type materials (polyols) that include glycerol (i.e., glycerine or glycerin), sorbitol, hydroxypropyl sorbitol, ethoxylated glycerol, propoxylated glycerol and mixtures thereof. Most preferred is glycerin, sorbitol or a mixture thereof. The amount of humectant employed may range anywhere from 0.0 to less than 7% by weight of the total weight of the aqueous phase. Often, and when used, humectant makes up from 0.1 to 6%, and preferably, from 0.2 to 5.25%, and most preferably, from 0.2 to 5% or from 0.3 to less than 5% or from 0.3 to 2.5% by weight (or from 0.2 to 1.5% by weight) of the total weight of the aqueous phase.

[0090] As to thickener or thickening agent suitable for optional use in the aqueous phase of the present invention, these materials are used particularly, as noted, to adjust the time it takes for the transient emulsion to revert back to an aqueous and oil phase. Typically useful are those thickeners generally classified as polysaccharides. Examples include fibers, starches, natural / synthetic gums and cellulosics. Representative of the starches are chemically modified starches such as sodium hydroxypropyl starch phosphate and aluminum starch octenylsuccinate. Tapioca starch may often be selected, as can maltodextrin. Suitable gums include xanthan, sclerotium, pectin, karaya, arabic, agar, guar (including Acacia Senegal guar), carrageenan, alginate and combinations thereof. Suitable cellulosics include hydroxypropyl cellulose, hydroxypropyl methylcellulose, ethylcellulose, sodium carboxy methylcellulose (cellulose gum / carboxymethyl cellulose) and cellulose (e.g. cellulose microfibrils, cellulose nanocrystals or microcrystalline cellulose). Sources of cellulose microfibrils include secondary cell wall materials (e.g. wood pulp, cotton), bacterial cellulose, and primary cell wall materials. Preferably and when used the source of primary cell wall material is selected from the parenchymal tissue of fruits, roots, bulbs, tubers, seeds, leaves and combinations thereof; and more preferably, is selected from citrus fruit, tomato fruit, peach fruit, pumpkin fruit, kiwi fruit, apple fruit, mango fruit, sugar beet, beet root, turnip, parsnip, maize, oat, wheat, peas or combinations thereof. Even more preferably when used, cell wall material is selected from citrus fruit, tomato fruit and combinations thereof. An often preferred source of primary cell wall material is parenchymal tissue from citrus fruit. Citrus fibers, such as those made available by Herbacel® as AQ Plus can also be used as a source for cellulose microfibrils. The cellulose sources can be surface modified by any of the known methods including those described in Colloidal Polymer Science, Kalia et al., “Nanofibrillated cellulose: surface modification and potential applications” (2014), Vol 292, Pages 5-31.

[0091] Still other thickening agents that may optionally be used include esters of polyalkoxylated polyols and fatty acids. Examples of such agents include PEG 18 glyceryloleate / cocoate, polyethylene glycol 6000 distearate, INCI name of PEG-150 distearate; PEG 120 methyl glucose dioleate and PEG 120 methylglucose trioleate (Glucomate™ DOE-120 and Glucomate™ VLT made available by Lubrizol); PEG-150 Pentaerythrityl Tetrastearate (Crothix™, Crothix™ Liquid, and Versathix™ made available by Croda); PEG-150 Polyglyceryl-2 Tristerate (Genapol® LT made available by Clariant); and PEG / PPG- 120 / 10-Trimethlolpropane Trioleate (Arlypon® TT made available by BASF). The number of hydrophilic polyalkoxylated arms are two for PEG- 150 distearate, three for Arlypon® TT, four for Genapol® LT and Crothix™, Crothix™ Liquid, and Versathix™, and five for Glucomate™ DOE- 120.

[0092] Another class of optional thickening agent suitable for use includes crosslinked polyacrylates such as the Carbomers, polyacrylamides such as Sepigel® 305 and taurate copolymers such as Simulgel® EG and Aristoflex® AVC, the copolymers being identified by respective INCI nomenclature as Sodium Acrylate / Sodium Acryloyldimethyl Taurate and Acryloyl Dimethyltaurate / Vinyl Pyrrolidone Copolymer. Another synthetic polymer suitable for optional thickening is an acrylate-based polymer made commercially available by Seppic and sold under the name Simulgel INS100. Calcium carbonate, fumed silica, and magnesium-aluminum-silicate may also be used.

[0093] In an embodiment of the invention and as noted, if thickener is used the compositions of the present invention are substantially free of thickener that is acrylate derived or based, and preferably, the compositions have less than 0.5% by weight, and most preferably, no (0.0%) by weight of acrylate-based thickener.

[0094] In another embodiment, the thickener used is a cationic polymer. Preferred cationic polymers are quaternary nitrogen-containing polysaccharides, preferably quaternary nitrogen-containing cellulose ethers, such as those described in U.S. Pat. Nos. 3,472,840; 3,962,418; 4,663,159, and U.S. Pat. No. 5,407,919. Particularly preferred are quaternary nitrogen-containing hydroxyethyl celluloses. Examples of such cationic polymers are salts of hydroxyethyl cellulose reacted with a trimethyl ammonium substituted epoxide such as Polyquaternium-10, made commercially available by Dow® as UCARE™ Polymer JR- 125, UCARE Polymer JR-400, UCARE Polymer KF, UCARE Polymer JR-30M, UCARE Polymer LR-400, UCARE Polymer LR-30M, UCARE Polymer LK mixtures thereof or the like.

[0095] Other preferred cationic polymers include those known as hydrophobically-modified cationic conditioning polymers such as those made commercially available also by Dow® under the names SoftCAT™ SL 5, SoftCATSL 30, SoftCATSL 60, SoftCATSL 100, SoftCAT SK-L, SoftCAT SK-M, and SoftCAT SK-H. Included for suitable use in the aqueous phase of the invention as thickening agent are those cationic polymers referred to as Polyquaternium-7, Polyquaternium-44, Polyquaternium 24 or mixtures thereof. In a preferred embodiment of the invention, the thickening agent used comprises at least 50%, and preferably, at least 75%, and most preferably, at least 85% (or from 90 to 100% or from 90 to 96% or from 92 to 98% or from 95 to 99.5% or 100%) by weight Polyquaternium-67 (2-hydroxyethyl cellulose ether, reacted with N,N,N-trimethyl-N- oxiranylmethylammonium chloride and N-dodecyl-N,N-dimethyl-N- oxiranylmethylammonium chloride) made commercially available by Dow® under the SoftCAT SK-M H name. The amount of thickening agent added when optionally desired in the aqueous phase ranges from 0 to 8%, and preferably, from 0.5 to 5%, and most preferably, from 1 to 5% (or from 1.5 to 4.5% or from 1.5 to 4% or from 1.5 to 3.5% or from 1.6 to 3.5% or from 1.7 to 2.4%) by weight of the of the biphasic composition. In still another embodiment of the invention, the thickener when used is a carrageenan (preferably, i-carrageenan), a nonionic polysaccharide (preferably, Solagum™ Tara from Seppic, Inc.) or a mixture thereof.

[0096] Nonionic surfactants may optionally be used in the aqueous phase of the present invention. If used, nonionic surfactants are typically used at levels from 0.2 to 6% (or from 0.2 to 5% or from 0.2 to 4% or from 0.6 to 3% or 0.6 to 1.5%) by weight of the biphasic composition. The nonionic surfactants which may be used include the reaction products of compounds having a hydrophobic group and a reactive hydrogen atom, for example aliphatic alcohols, acids, amides or alkylphenols with alkylene oxides, especially ethylene oxide either alone or with propylene oxide. Specific nonionic surfactant compounds are alkyl (C6-C22) phenol condensates with ethylene oxide, the condensation products of aliphatic (Cs-Cis) primary or secondary linear or branched alcohols with ethylene oxide, and products made by condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine. Other nonionic surfactants include long chain tertiary amine oxides, long chain tertiary phosphine oxides, dialkyl sulphoxides, or the like. In an embodiment of the invention, nonionic surfactants optionally used can include fatty acid / alcohol ethoxylates having the following structures a) HOCH2(CH2)S(CH2CH2O)VH or b) HOOC(CH2)c(CH2CH2O)d H; where s and v are each independently an integer up to18; and c and d are each independently an integer from 1 or greater. In an embodiment of the invention, s and v are each independently 6 to 18; c and d are each independently 1 to 30. Other options for nonionic surfactants include those having the formula HOOC(CH2)i- CH=CH--(CH2)k(CH2CH2O)zH, where i, k are each independently 5 to 15; and z is 5 to 50. In another embodiment of the invention, i and k are each independently 6 to 12; and z is 15 to 35.

[0097] The nonionic may also include a sugar amide, such as a polysaccharide amide. Specifically, the surfactant may be one of the lactobionamides described in U.S. Pat. No. 5,389,279 to Au et al., entitled "Compositions Comprising Nonionic Glycolipid Surfactants issued Feb. 14, 1995 or it may be one of the sugar amides described in U.S. Pat. No. 5,009,814 to Kelkenberg, entitled "Use of N-Poly Hydroxyalkyl Fatty Acid Amides as Thickening Agents for Liquid Aqueous Surfactant Systems" issued Apr. 23, 1991.

[0098] In an embodiment of the invention, the anionic surfactant used is glycerol monostearate, cocamide monoethanolamine, CMEA, or a mixture thereof which may optionally make up from 0.06 to 0.75% or from 0.1 to 0.65% or from 0.2 to 0.55% by weight of the biphasic composition made via the present invention. In another embodiment, the compositions of the present invention will have no (0.0% by weight) nonionic surfactant.

[0099] In another embodiment of the invention, cationic surfactants may optionally be used in the biphasic composition of the present invention.

[0100] One class of optional cationic surfactants includes heterocyclic ammonium salts such as cetyl or stearyl pyridinium chloride, alkyl amidoethyl pyrrylinodium methyl sulfate, and lapyrium chloride.

[0101] Tetra alkyl ammonium salts are another useful class of cationic surfactants suitable for optional use. Examples include cetyl or stearyl trimethyl ammonium chloride or bromide; hydrogenated palm or tallow trimethylammonium halides; behenyl trimethyl ammonium halides or methyl sulfates; decyl isononyl dimethyl ammonium halides; ditallow (or distearyl) dimethyl ammonium halides, and behenyl dimethyl ammonium chloride.

[0102] Still other types of cationic surfactants that may be used are the various ethoxylated quaternary amines and ester quats. Examples include PEG-5 stearyl ammonium lactate (e.g., Genamin KSL manufactured by Clariant), PEG-2 coco ammonium chloride, PEG-15 hydrogenated tallow ammonium chloride, PEG 15 stearyl ammonium chloride, dipalmitoyl ethyl methyl ammonium chloride, dipalmitoyl hydroxyethyl methyl sulfate, and strearyl amidopropyl dimethylamine lactate.

[0103] Even other useful cationic surfactants suitable for optional use include quaternized hydrolysates of silk, wheat, and keratin proteins, and it is within the scope of the invention to use mixtures of the aforementioned cationic surfactants.

[0104] If used, cationic surfactants will make up no more than 2% by weight of the biphasic composition. If present, cationic surfactants will typically make up from 0.01 to 0.5%, and more typically, from 0.1 to 0.3% by weight of the composition. In another embodiment, the biphasic composition of the present invention have no (0.0% by weight) cationic surfactant.

[0105] Water makes up from 8 to 40%, and preferably, from 10 to 35%, and most preferably, from 9 to 32% (or 9 to 30% or 10 to 28% or 11 to 27%) by weight of the biphasic composition.

[0106] As to the oil phase, in general, suitable oils that may be included are any of those which may be topically applied like silicone oils and / or mineral oil, but preferably oils that are naturally sourced and sustainable, and mono-, di-, and especially, triglycerides.

[0107] Illustrative examples of oils that may be included for use are arachis oil, castor oil, coconut oil, corn oil, cotton seed oil, olive oil, rapeseed oil, canola oil, safflower seed oil, sesame seed oil, soybean oil, hydrogenated soybean oil, sunflower oil, high oleic sunflower oil (i.e. , at least 75%, preferably at least 80% oleic acid), avocado oil, macadamia nut oil, argan oil, pomegranate oil, argan Moroccan oil, moringa oil, blueberry oil, raspberry oil, walnut oil, pecan oil, peanut oil, bayberry oil, mango seed oil, jojoba oil, hydrolyzed jojoba oil, sucrose distearate, sucrose tristearate, sucrose tertastearate, walnut oil, cranberry oil, isododecane, isohexadecane, liquid paraffins and / or alkanes including C9-C15 paraffins and / or alkanes, preferably C11-C13 paraffins and / or alkanes, liquid isoparaffins and / or isoalkanes like C9-C15 isoparaffins and / or isoalkanes, preferably C11-C13 isoparaffins and / or isoalkanes, mixtures thereof or the like. While the biphasic composition of the present invention is preferably substantially free of silicone oil, if optionally used the same can include, for example, PEG-3 dimethicone, PEG-8 dimethicone, PEG-9 dimethicone, PEG-10 dimethicone, PEG-11 methyl ether dimethicone, PEG-12 dimethicone, PEG-14 dimethicone, PEG-17 dimethicone, PEG-32 dimethicone mixtures thereof or the like.

[0108] In an embodiment of the invention, the oil comprises sunflower oil, moringa oil, soybean oil or a mixture thereof. In another embodiment of the invention, the oil used is from 55 to 100%, or from 70 to 100% or from 85 to 100% (or 85 to 98% or 90 to 98%) by weight of plant derived triglyceride. In still another embodiment, the oil used is at least 40% by weight, and preferably, at least 45%, and most preferably, 48% to 68% by weight monounsaturated and / or from 10% to 30%, or 12% to 28%, or from 15% to 25% by weight polyunsaturated.

[0109] In even another embodiment of the invention, the oil selected for use comprises a mixture of oils where at least 50% by weight, and preferably, at least 75% to 99.9% by weight (or from 80 to 95% or from 85 to 92% or from 82 to 90% by weight of the oil used is soybean or sunflower oil or s mixture thereof (liquids at 25°C) based on total weight of the oil in the oil phase. In another embodiment, less than 5% by weight of the total oil used, and preferably, less than 2.5%, and most preferably, none of the oil used is D5 cyclic siloxane (decamethylcyclopentasiloxane). In still another embodiment, the oil used is all (100% by weight based on total weight of the oil) soybean oil or sunflower oil or moringa oil.

[0110] In an embodiment of the invention, the oil selected for use is isododecane, isohexadecane or a mixture thereof.

[0111] Typically, the oil used will be evenly or homogenously dispersed in the aqueous phase within the transient emulsion (in view of the surfactants used) and / or will not be solubilized, having a droplet size from 1 to 500 microns, and preferably, from 2 to 200 microns, and most preferably, from 2 to 60 microns (or from 2 to 30 microns or from 2 to 20 microns or from 2 to 10 microns) in the transient emulsion where droplet size may be taken with a particle size analyzer, like a commercially available Malvern MS3000 Analyzer or visually by viewing and measuring droplets with a commercially available optical microscope.

[0112] In still another embodiment of the invention, the oil phase can optionally have added thereto occlusive that is a semi-solid at 22°C, like petroleum jelly, CAS No. 8009-03-08, whereby such occlusive is a combination of hydrocarbons mainly having carbon chains longer than 25. Petroleum jelly, therefore, is characterized as a composition made predominately of the paraffin series that can be obtained by, for example, dewaxing lubricating oil stock (or crude oil refining) whereby the same melts at temperatures from 35 to 72°C (more often 40 to 70°C) and boils at a temperature of 285°C or higher and often at a temperature between 295 and 325°C. Such occlusive is characterized as a semi-solid that spreads well topically at skin’s natural temperature of 33 to 37°C. Free of polycyclic aromatics, the most well-known and best produced petroleum jelly is sold under the brand name Vaseline®. In the present invention, petroleum jelly and petrolatum are meant to be the same. Semi-solid, as used herein, means soft like Vaseline®, not pourable at room temperature but spreadable on skin at room temperature.

[0113] Other materials suitable as semi-solid occlusive for optional addition include those made to mimic petroleum jelly (“petroleum jelly substitute” or “substitute”) but are not derived from petroleum or any biproduct or residue recovered from the processing of the same such as processing for gas production. They are, therefore, preferably plant-based, sustainable, soft solids that melt at temperatures similar to those described for petroleum jelly (more often from 29 to 65°C).

[0114] Such a petroleum jelly substitute suitable for use can be a vegetable-based substitute comprising, for example, triglycerides, castor oil, glycerin, caprylic / capric triglyceride, polyglyceryl ricinoleate, coconut oil, sunflower seed oil, safflower oil, cottonseed oil, olive oil, mixtures thereof or the like. Other options include the occlusives described in WO 22150812 A1 , WO 22150813 A1 , WO 22150814 A1, WO 221150815 A1, U.S. Patent No. 8,524,211.

[0115] Additional occlusive suitable for use is sold under the name BOTANIJELLY™ and made commercially available by Cargill (INCI hydrogenated vegetable glycerides). Other available occlusives that may be used as occlusive include those sold commercially by Sonneborn under the SonneNatural™ name and including the J-207, NXG, and PF-1 varieties.

[0116] When used, occlusive of the soft-solid type makes up from 0.5 to 10% or from 1 to 8% or from 2 to 7% or from 3 to 7% by weight of the total weight of the oil phase used in the biphasic composition. In an embodiment of the invention, when occlusive of the soft-solid type is used, the same will, in the compositions of the invention, have a droplet size consistent with the droplet sizes defined herein for the oils used that are liquid at 25°C. In yet another embodiment, the occlusive may be solubilized.

[0117] In an alternative, occlusive of the soft-solid type may be added to the aqueous phase in a nanoemulsion, thus delivering occlusive of the soft-solid type with an oil droplet size from 2 nm to 600 nm, and preferably, from 4 to 200 nm or from 5 to 100 nm or from 8 to 25 nm. When used oil present in the aqueous phase as nano-droplets ranges from 1.5 to 8.5% by weight of the aqueous phase, and preferably, from 2 to 7.5%, or from 2 to 7%, and most preferably, from 3 to 6.5% or from 3.5 to 6% or from 3.8 to 5.7% or from 3.8 to 5.5% by weight of the aqueous phase.

[0118] When making the end use composition (i.e. , transient emulsion), the aqueous phase and oil phase are combined at a weight ratio (aqueous phase : oil phase) of 2: 1 to 1 :2, or from 1.9:1.1 to 1:1 to 1.9, or from 1.75:1 to 1 :1.75 or from 1.5:1 to 1:1.5 or from 1.35:1 to 1:1.35 or from 1.25: 1 to 1 : 1.25 or from 1.15: 1 to 1 : 1.15 or from 1:1. When combining as herein described with, for example, moderate shearing or agitation, a homogeneous end use wash composition is obtained where the same is the transient emulsion. For consumer brand experience, the biphasic composition is typically provided in a transparent of translucent package, preferably transparent bottles, including those which are glass or plastic (e.g., those comprising polyethylene terephthalate as well as such with post-consumer resin and bottles which are bispenol-A free).

[0119] As noted above the transient emulsion is homogeneous after applying shear and reverts back to being biphasic in a time period from 3 minutes to 1 day, or from 4 minutes to 5 hours or from 5 minutes to 2 hours or from 5 minutes to 1 hour or from 5 to 30 minutes, or from 7 to 25 minutes or in 8 to 20 minutes (or 8.5 to 18 minutes or 9.5 to 17 minutes). In an embodiment of the invention, the transient emulsion begins to separate in 4.5 minutes and reverts back to 2 phases within 1 day from the time the composition begins to separate. In still yet another embodiment of the invention, the amount of aqueous phase and oil phase used (in terms of weight percent of each) in the biphasic composition ais where the weight percent of both phases are within 15% or within 10% or within 5% or within 2% of each other, or equal to each other. For the avoidance of doubt, if a water-soluble ingredient ‘WS” makes up 5% by weight of the biphasic composition and the biphasic composition is a 50 / 50 ratio of the aqueous and oil phases, then WS is present in the aqueous phase at 10% by weight.

[0120] Preservatives can desirably be incorporated into the aqueous phase used in the invention to protect against the growth of potentially harmful microorganisms. Cosmetic chemists are familiar with appropriate preservatives and routinely choose them to satisfy the preservative challenge test and to provide product stability. Suitable traditional preservatives for use include propionate salts. Suitable preservatives are iodopropynyl butyl carbamate, phenoxyethanol, sodium benzoate, hydroxyacetophenone, ethylhexylglycerine, hexylene glycol, methyl paraben, propyl paraben, imidazolidinyl urea, sodium dehydroacetate, dimethyl-dimethyl (DMDM) hydantoin, benzyl alcohol and mixtures thereof. Other preservatives suitable for use include sodium dehydroacetate, chlorophenesin and decylene glycol. Preservatives are preferably employed in amounts ranging from 0.08 to 2.6% by weight of the total weight of the aqueous phase. Also preferred is a preservative system with hydroxyacetophenone alone or in a mixture with other preservatives. Standard emollients, like vicinal diols (e.g., 1 ,2-hexane diol and / or 1 ,2-octane diol), may be used with the preservatives. In an embodiment of the invention, the preservative used is sodium benzoate. In another embodiment, the preservative used is Galguard® (phenoxyethanol, benzoic acid, capryloyl glycine, undecylenoyl glycine) made available from Galaxy. In even another embodiment, the preservative used comprises collectively in total less than 25% by weight, and preferably, less than 15% by weight methylchloroisothiazolinone and methylisothiazolinone based on total weight of the preservative used. In still another embodiment, no methylchloroisothiazolinone and methylisothiazolinone are used in the compositions of the present invention. As noted herein, the preservative used is preferably substantially free of parabens and hydantoins, and most preferably, the preservative has no paraben and no hydantoin. In another preferred embodiment, the preservative used is sodium benzoate.

[0121] Inorganic salt (i.e. , electrolyte) is an optional but often desired ingredient to aid in stabilization of the compositions. Typical salts may be used like NaCI, KCI, MgCh, CaCh, mixtures thereof or the like. Such inorganic salt makes up from 0.2 to 2.5%, and preferably, from 0.25 to 2%, and most preferably, from 0.3 to 1.75% (or from 0.3 to 1.5% or from 0.4 to 1.5%) by weight of the biphasic composition.

[0122] The pH of the compositions (aqueous phase and end use) is as herein defined from greater than 5.75 to 8.5. Adjusters for pH consistency are suitable for use. Such pH adjusters include amino methyl propanol, triethylamine, triethanolamine, ammonium, arginine, diisopropanolamine, triisopropanolamine, NaOH, KOH, H2SO4, HCI, Ce Hs O7 (i.e., citric acid) or mixtures thereof. The pH adjusters are added at amounts to yield the desired final pH. The pH values may be assessed with commercial instrumentation such as a pH meter made commercially available from Thermo Scientific®. Typically, such adjusters make up from 0.5 to 2.5%, and preferably, from 0.7 to 2%, and most preferably, from 0.9 to 1.7% (or from 1 to 1.5% or from 1 to 1.3%) by weight of the aqueous phase.

[0123] Structurants may optionally be used for aiding in structuring of the end use composition (transient emulsion). Illustrative examples of such components include Cs to C18, and preferably, C10 to C16, and most preferably, C12 to C14 fatty acids, fatty alcohols, fatty amides or mixtures thereof. In an embodiment of the invention, such a component is lauric acid, myristic acid, palmitic acid, stearic acid or a mixture thereof where the hydrophobic portion of such can be unsaturated but typically with no more than one double bond. Typically, structuring components, if used, make up from 0.001 to 8%, and preferably, from 0.5 to 4%, and most preferably, from 0.7 to 3.8% or from 0.8 to 3% or from 1 to 5% by weight of the aqueous phase (often from 2 to 3% by weight of the biphasic composition). In another embodiment, a fatty alcohol like lauryl alcohol, myristyl alcohol, palmityl alcohol or a mixture thereof may be used. In still another embodiment, a fatty alcohol may be used with a fatty acid like lauric acid where the mixture of fatty alcohol and fatty acid is from 45 to 80%, and preferably, from 50 to 75%, and most preferably, from 52 to 72% or from 62 to 72% or from 65 to 70% by weight fatty alcohol based on total weight of structurant (i.e. , fatty alcohol and fatty acid) in the aqueous phase. For the avoidance of doubt, the structurant, when used, can aid in the transient emulsion having lamellar wash composition characteristics where lamellar means the packing of molecules with polar heads and non-polar tails as bilayer sheets separated by a polar liquid like water.

[0124] Antioxidants are suitable for optional use. When used, they typically make up from 0.2 to 2% or from 0.3 to 1.6% or from 0.4 to 1.25% by weight of the biphasic composition. The antioxidants suitable for use can be water or oil soluble. Illustrative water-soluble antioxidants that may be used include Vitamin C, uric acid, glutathione, a mixture thereof or the like. Fat soluble antioxidants include Vitamin E (and its derivatives), lycopene, carotene, coenzyme Q10, mixtures thereof or the or the like. Other suitable options include, Tinogard® TL, Tinogard® TT or the like.

[0125] Optional skin benefit agents are suitable for use in this invention, and they are limited only to the extent that the agents are capable of being topically applied via a wash composition.

[0126] Illustrative examples of the water-soluble benefit agents suitable to include in the aqueous pase are vitamin B2, niacinamide (vitamin B3), vitamin Be, vitamin C, mixtures thereof or the like. Water soluble derivatives of such vitamins may also be employed. For instance, vitamin C derivatives such as ascorbyl tetraisopalmitate, magnesium ascorbyl phosphate and ascorbyl glycoside may be used alone or in combination with each other. Other water-soluble benefit agents suitable for use include 4-ethyl resorcinol, extracts like sage, aloe vera, green tea, grapeseed, thyme, chamomile, yarrow, cucumber, liquorice, rosemary extract or mixtures thereof. Water soluble sunscreens like ensulizole may also be used.

[0127] In another embodiment, water soluble active suitable for use includes at least one of S- adenosyl-L-methionine, a 1 -alkyl nicotinamide having structure X, and a methionine having structure XI:

[0128] wherein Rcis a CM alkyl, preferably, methyl (N-methyl nicotinamide) and X' is a negative counter ion, preferably, Cl- , Rdis methyl, ethyl, propyl, hydroxymethyl, 2-hydroxyethyl, preferably, methyl and Reis H, methyl, ethyl, isopropyl, preferably, H (N-acetyl methionine). Such components are described in WO / 2021 / 008824A1. If used, from 0.0001 to 10% or from 0.001 to 8%, and most preferably, from 0.01 to 5% or from 0.01 to 3% or from 0.01 to 2% or from 0.01 to 1% by weight of each of such ingredients, independently, may be used alone or in a combination thereof in the biphasic composition. In another embodiment, any of such ingredients may optionally be used with from 0.01 to 4%, or from 0.01 to 2% or from 0.01 to 1% or from 0.1 to 0.8% by weight niacinamide or 12-hydroxystearic acid or both, based on total weight of the biphasic composition. In even another embodiment, the biphasic composition may comprise acetyl cysteine at from 0.001 to 1.8% by weight of the biphasic composition.

[0129] As to the total amount of optional water-soluble benefit agents (including mixtures) that may be used in the present invention, the same may range from 0.001 to 10%, and preferably, from 0.001 to 8%, and most preferably, from 0.01 to 6% by weight, based on total weight of the biphasic composition.

[0130] It is also within the scope of the present invention to optionally include oil (i.e., non-water) soluble benefit agents. The oil soluble actives or benefit agents are solubilized or carried in the oil phase of the present invention.

[0131] Illustrative examples of the types of oil soluble benefit agents that may optionally be used in the compositions of this invention include components like stearic acid, vitamins like vitamin A, D, E and K (and their oil soluble derivatives), sunscreens like ethylhexylmethoxycinnamate, bis-ethyl hexyloxyphenol methoxyphenol triazine, 2- ethylhexyl-2-cyano-3,3-diphenyl-2-propanoic acid, drometrizole trisiloxane, 3,3,5-trimethyl cyclohexyl 2-hydroxybenzoate, 2-ethylhexyl-2-hydroxybenzoate or mixtures thereof. Other optional oil soluble benefit agents suitable for use include resorcinols like 4-hexyl resorcinol, 4-phenylethyl resorcinol, 4-cyclopentyl resorcinol, 4-cyclohexyl resorcinol 4- isopropyl resorcinol or a mixture thereof. Also, 5-substituted resorcinols like 4-cyclohexyl- 5-methylbenzene-1,3-diol, 4-isopropyl-5-methylbenzene-1 ,3-diol, mixtures thereof or the like may be used. The 5-substituted resorcinols and their synthesis are described in commonly assigned U.S. Published Patent Application No. 2016 / 0000669A1.

[0132] Even other oil soluble actives suitable for use include omega-3 fatty acids, omega-6 fatty acids, climbazole, farnesol, ursolic acid, myristic acid, geranyl geraniol, oleyl betaine, cocoyl hydroxyethyl imidazoline, hexanoyl sphingosine, 12-hydroxystearic acid, petroselinic acid, conjugated linoleic acid, terpineol, thymol mixtures thereof or the like.

[0133] In an embodiment of the invention, the optional oil soluble benefit agent used is a retinoic acid precursor. In one embodiment of the invention, the retinoic acid precursor is retinol, retinal, retinyl propionate, retinyl palmitate, retinyl acetate or a mixture thereof. Retinyl propionate, retinyl palmitate and mixtures thereof are typically preferred. Additionally, 12- hydroxystearic acid is often preferred for use.

[0134] When optional oil soluble active is used, collectively, the same or mixtures of actives typically makes up from 0.0 to 3.5%, and preferably, from 0.001 to 2.5%, and most preferably, from 0.05 to 2% (or from 0.5 to 1.6%) by weight of the end use composition (i.e. transient emulsion).

[0135] Fragrances, fixatives, chelators (like EDTA or tetrasodium glutamate diacetate) and exfoliants may optionally be included in the compositions of the present invention. Each of these substances may range from about 0.03 to about 5%, preferably between 0.1 and 3% by weight of the total weight of the end use composition. To the extent the exfoliants are used, those selected should be of small enough particle size so that they do not impede the performance of any packaging used to dispense the compositions of this invention.

[0136] Conventional emulsifiers having an HLB of greater than 8 may optionally be used. Illustrative examples include Tween, 40, 60, 80, polysorbate 20 and mixtures thereof. Typically, emulsifiers for water continuous systems make up from 0.3 to 2.5% by weight of the end use composition. In an embodiment of the invention, biphasic wash composition comprises from 0.01 to 4.5%, or from 0.02 to 4%, or from 0.03 to 3.5% by weight of at least one of glycerol, palmitic acid, 12-hydroxystearic acid, caffeine, stearic acid, mandelic acid, hyaluronic acid, salicylic acid, ceramides, sphingosine, thiamidol, honokiol, thymol, terpineol, conjugated linoleic acid, niacinamide, glycolic acid, lactic acid, benzalkonium chloride, cetrimonium chloride, benzoyl peroxide, vitamin E, benzyl alcohol, citric acid, aloe barbadensis leaf juice, or a mixture thereof. In another embodiment of the invention, the biphasic wash composition does comprise palmitic acid, glycerol, and at least one of stearic acid and 12 hydroxystearic acid. In even another embodiment, the biphasic wash composition comprises from 0.5 to 3% or from 0.8 to 2.8% or from 1to 2% by weight 12-hydroxystearic acid, whereby the aqueous phase and oil phase are transparent and when the two phases exist, surprisingly, at least 80% or at least 85% or from 90 to 100% or from 92 to 98% by weight of the total weight of 12-hydroxystearic acid used is present in the aqueous phase.

[0137] When making the water and oil phases of the present invention, the desired ingredients may be mixed with conventional apparatus under moderate shear and atmospheric conditions, with temperature being from 30 to 80°C. Moderate shear such as shaking (or stirring) in a conventional mixer will yield the desired phases where shear stops when the phase being made is homogeneous.

[0138] Silicone

[0139] The compositions of the invention can contain emulsified droplets of a silicone conditioning agent, which is preferably not hydrophobically modified.

[0140] Suitable silicones include polydimethylsiloxanes which have the CTFA designation dimethicone. Also suitable for use compositions of the invention are polydimethyl siloxanes having hydroxyl end groups, which have the CTFA designation dimethiconol. Preferably, the silicone is selected from the group consisting of dimethicone, dimethiconol, amodimethicone and mixtures thereof. Also preferred are blends of amino-functionalised silicones with dimethicones.

[0141] The internal phase viscosity of the emulsified silicone itself (not the emulsion or the final hair conditioning composition) is typically at least 10,000 cst at 25 °C the viscosity of the silicone itself is preferably at least 60,000 cst, most preferably at least 500,000 cst, ideally at least 1,000,000 cst. Preferably the viscosity does not exceed 109cst for ease of formulation.

[0142] Emulsified silicones for use in the compositions of the invention will typically have a D90 silicone droplet size in the composition of less than 30, preferably less than 20, more preferably less than 10 micron, ideally from 0.01 to 1 micron. Silicone emulsions having an average silicone droplet size (D50) of 0.15 micron are generally termed microemulsions.

[0143] Silicone particle size may be measured by means of a laser light scattering technique, for example using a 2600D Particle Sizer from Malvern Instruments.

[0144] Examples of suitable pre-formed emulsions include Xiameter MEM 1785 and microemulsion DC2-1865 available from Dow Corning. These are emulsions / microemulsions of dimethiconol. Cross-linked silicone gums are also available in a preemulsified form, which is advantageous for ease of formulation.

[0145] A further preferred class of silicones for inclusion in compositions of the invention are amino functional silicones. By "amino functional silicone" is meant a silicone containing at least one primary, secondary or tertiary amine group, or a quaternary ammonium group. Examples of suitable amino functional silicones include: polysiloxanes having the CTFA designation "amodimethicone". A preferred amodimethicone is available from Dow Corning as DC 7134.

[0146] Specific examples of amino functional silicones suitable for use in the invention are the aminosilicone oils DC2-8220, DC2-8166 and DC2-8566 (all ex Dow Corning).

[0147] Suitable quaternary silicone polymers are described in EP-A-0 530 974. A preferred quaternary silicone polymer is K3474, ex Goldschmidt.

[0148] Also suitable are emulsions of amino functional silicone oils with non ionic and / or cationic surfactant.

[0149] Pre-formed emulsions of amino functional silicone are also available from suppliers of silicone oils such as Dow Corning and General Electric. Specific examples include DC939 Cationic Emulsion and the non-ionic emulsions DC2-7224, DC2-8467, DC2-8177 and DC2-8154 (all ex Dow Corning). The total amount of silicone is preferably from 0.1 wt % to 10 wt % of the total composition more preferably from 0.1 wt % to 5 wt %, most preferably 0.25 wt % to 3 wt % is a suitable level.

[0150] The compositions of the present invention may include an appearance modifier to improve visual appearance and / or consumer appeal of the product. Most preferably the appearance modifier is a pearlescer selected from mica, titanium dioxide, titanium dioxide coated mica, ethylene glycol distearate (INCI glycol distearate) and mixtures thereof.

[0151] The Examples provided are to facilitate an understanding of the invention. They are not intended to limit the scope of the claims.

[0152] Example I

[0153] Biphasic wash compositions consistent with this invention and controls were prepared and assessed. Sample 1 was prepared by combining the ingredients identified in Table 1 and all ingredients were mixed with moderate shear under atmospheric conditions at a temperature from about 35 to 75°C. The phases made consistent with the invention were stable, displayed no color change or syneresis. The phases were subsequently agitated by skilled panelists to mimic in home use and to mimic washing conditions with the resulting transient emulsions.

[0154] In these examples, the “furan sulfonate” was made according to the method given herein above, under the heading “Method of making furan-based sulphate free anionic surfactant”. The resulting furan sulfonate surfactant had a 2:1 blend of C12 and C14 tails.

[0155] Table 1 : Composition of sample 1, in accordance with the invention

[0156] Table 2: Composition of samples 2-5, illustrative of the invention (hypothetical examples)

[0157] AM P-Ami nomethyl Propanol 12- HSA- 12 Hydroxystearic Acid

[0158] CKD Betaine-Cocamidopropyl Betaine;

[0159] Solagum Tara-Natural Gum Polysaccharide, Seppic, Inc.

[0160] All samples were made according to the invention. The phases mixed well with less than 1.5 minutes of agitation. Skilled panelists concluded the resulting transient emulsions provided excellent sensory characteristics upon use. With 50% by weight oil in such emulsions unexpectedly delivered excellent lather characteristics, lather consistent with compositions having less than 10% by weight oil.

Claims

CLAIMS1. A biphasic composition comprising:I. an aqueous phase comprising: a. anionic surfactant having; i) a first anionic surfactant comprising an anionic saccharide-based surfactant or an anionic saccharide-based surfactant, and a C10-C20 lactylate, a C10-C20 glycolate or both and with the proviso that when the lactylate, glycolate or both and saccharide-based surfactants are present, the first anionic surfactant is at least 40% by weight anionic saccharide-based surfactant based on total weight of the first anionic surfactant; ii) a second anionic surfactant comprising a furan-based anionic sulphate free surfactant; which comprises:A) a head group comprisingAi) a furan ringAii) a sulphonate group; wherein the furan-based anionic sulphate free surfactant has the structure of Formula (I):Formula (I) where R is a hydrophobic alkyl tail group having a carbon chain length of 8 to 18, 18:1 and 18:2 where R groups of different chain lengths can be used in combination as a blend, preferably a blend of chain lengths of C12 and C14 and X is a counterion, selected from organic and inorganic counterions;B) an amide containing linker group; andC) a hydrophobic alkyl tail group having a carbon chain length of 8 to 18; iii) amphoteric surfactant, zwitterionic surfactant or both;iv) 5 to 17%, and preferably, 7 to 16%, and most preferably, 7.5 to 15% (or from 8 to 15% or from 9 to 14.5% or from 9.5 to 13.5%) by weight of solvent comprising from 83 to 100% by weight C3 to C10 diol based on total weight of the solvent; v) optionally a thickener; and vi) 8 to 40%, and preferably, from 10 to 35%, and most preferably, from 11 to 32% (or 12 to 31% or 12 to 30% or 12 to 29%) by weight water; and vii) from 0.0 to 8% by weight of a Cs to Cis, and preferably, C10 to C16, and most preferably, C12 to C14 fatty acid, fatty alcohol, fatty amide or mixture thereof; andII. an oil phase comprising: at least 92.5%, and preferably, 93 to 100% and most preferably, from 94 to 100% by weight oil or from 94 to 99% or from 95 to 98% by weight oil or 100% by weight oil that is clear at a temperature from -21°C to 35°C, and preferably, from -20°C to 35°C, and most preferably, from -18°C to 35°C or from -17°C to 35°C or from -17 to 30°C or from -16 to 28°C wherein the aqueous phase has a pH greater than 5.7 to 8, and the biphasic composition comprises at least 3.3 to 9.5% by weight of the first anionic surfactant, and from 7.5 to 18.5%, and preferably, from 7.7 to 18%, and most preferably, from 8 to 18% or from 8.2 to 18% or from 11 to 18% or from 12 to 18% or from 13 to 18% total surfactant based on total weight of the biphasic composition and further wherein the aqueous phase and the oil phase each, independently, make up from 30 to 70% by weight of the biphasic composition.

2. The biphasic composition according to claim 1 wherein the composition comprises from 0 to less than 2% by weight of a sulfate-based surfactant and less than 75 ppm of a dioxane.

3. The composition according to claim 1 or 2 wherein the composition comprises no sulfate based surfactant.

4. The composition according to any of the previous claims wherein the composition further comprises 12-hydroxystearic acid and at least 80% or at least 85% or from 90 to 100% or from 92 to 98% by weight of the total weight of 12-hydroxystearic acid used is present in the aqueous phase.

5. The composition according to any of the previous claims wherein the composition further comprises caffeine, stearic acid, mandelic acid, hyaluronic acid, salicylic acid, ceramide, sphingosine, thiamidol, honokiol, thymol, terpineol, conjugated linoleic acid, niacinamide, glycolic acid, lactic acid, benzalkonium chloride, cetrimonium chloride, benzoyl peroxide, vitamin E, benzyl alcohol, citric acid, aloe barbadensis leaf juice, or a mixture thereof.

6. The composition according to any of the previous claims wherein the first anionic surfactant is sodium stearoyl lactylate, disodium cocoglucoside citrate or a mixture thereof and the second anionic surfactant is a furan-based anionic sulphate free surfactant as defined in claim 1.

7. The composition according to any of the previous claims wherein the first anionic surfactant used in the aqueous phase is at least 1.5% by weight of the biphasic composition, or from 2 to 12%, and preferably, from 2.2 to 11%, or from 2.2 to 10% or from 2.4 to 10.5% or from 2.3 to 9% or from 4 to 9% or from 4.25 to 8.5%, or from 4.5 to 8.5% or from 4.7 to 8%) by weight of the biphasic composition.

8. The composition according to any of the previous claims wherein the composition comprises from 6.5 to 16%, and preferably, 7 to 16%, and most preferably, 7 to 14.5% or from 8 to 14% or from 8.5 to 13.5% or from 9 to 13% by weight of the solvent.

9. The composition according to any of the proceeding claims wherein the composition is transparent or translucent.

10. The transparent or translucent composition according to claim 9 wherein the composition begins to separate after being at rest for a period of 3 minutes to one day.

11. A method for making a transparent or translucent wash composition comprising the steps of: a. agitating the biphasic composition according to any of the previous claims; b. obtaining a transparent or translucent composition.

Images