Hydrable concentrated and layered surfactant compositions

Abstract

The present invention relates to a hydratable concentrated surfactant composition. The composition is pourable, easy to dilute, substantially free of sulfates and oils, and comprises C 6 ‑C 14 Acid, alcohol or both, anionic surfactant containing acyl isethionate and amphoteric surfactant, zwitterionic surfactant or both. The composition is in a lamellar phase and thickens and transforms to an isotropic phase upon dilution. The composition can be used as a small volume concentrate and diluted at the time of use and as needed or can be diluted with water in a refill package to ensure reduction of plastic waste.

Description

Field of the Invention

[0001] The present invention relates to a hydratable concentrated surfactant composition. The composition is pourable, substantially free of sulfates and oils, and comprises C6-C 14 Acid, alcohol or both, anionic surfactant and amphoteric surfactant, zwitterionic surfactant or both. The composition is in a lamellar phase and unexpectedly thickens and transforms to an isotropic phase upon dilution. The composition can be used as a small volume concentrate and diluted at the time of use and as needed or can be diluted with water in a refill package to ensure reduction of plastic waste. Background of the Invention

[0003] Liquid-based cleaning compositions, such as shampoos and body washes, are common and popular with many consumers. Such compositions usually have water as the main ingredient, and they are usually sold in plastic bottles or plastic tubes. The compositions are usually formulated to have a viscosity that consumers are accustomed to using and to be easily emptied from the packaging in which they are sold.

[0004] It is often publicized that there will soon be more plastic in the world's oceans than fish. In light of environmental concerns and the desire of consumers and conscious companies to do more for the planet, there is a strong desire to reduce the use of plastic when marketing products, including consumer products. In light of this, attempts have been made to market products in concentrated form and, therefore, to ship products that contain less water. The difficulty with concentrates is that consumers generally do not like the addition of additional water to the concentrate and the further work, such as stirring, to convert the concentrate into a final, usable product. For hydrated products, common complaints include uneven product and / or unsatisfactory viscosity after the addition of water.

[0005] There is growing interest in developing a concentrate that is easy to pour and hydrate, thereby producing a consumer product that is ready to use within five (5) minutes and has highly desirable properties, including viscosity. It is also desirable to develop a concentrate that is substantially free of sulfates and that is easy to use with refill packaging to reduce plastic waste. Accordingly, the present invention relates to a concentrate comprising C6-C 14 A composition of an acid, an alcohol or both, an anionic surfactant and an amphoteric surfactant, a zwitterionic surfactant or both. The composition is in a lamellar phase and unexpectedly thickens and transforms to an isotropic phase upon dilution. The composition can be used as a concentrate and diluted as needed, or can be diluted with water in a refill package to ensure reduction of plastic waste.

[0006] Additional Information

[0007] Efforts to prepare cleaning compositions have been disclosed. In U.S. Patent Application Publication No. 2019 / 031258A1, a concentrated foaming composition rheologically fluidized is described.

[0008] Even other efforts to prepare cleaning compositions have been disclosed. In U.S. Patent Application Publication No. 2018 / 098923A1, personal care compositions substantially free of sulfated surfactants are described.

[0009] Other efforts to prepare cleaning compositions have also been disclosed. In U.S. Patent Application 2019 / 282480A1, a self-thickening cleaning composition having an N-acyl acidic amino acid or a salt thereof and an amphoteric surfactant is described.

[0010] There is no additional information describing the surfactant-containing compositions described and claimed in this application. SUMMARY OF THE INVENTION

[0012] In a first aspect, the present invention is directed to a hydratable concentrated surfactant composition having a viscosity of 25 to 10,000 cps (preferably 25 to 7,500 cps, more preferably 250 to 3,500 cps), wherein when diluted with water at a composition to water weight ratio of 1:1 to 1:10 (preferably 1:2 to 1:7, more preferably 1:3 to 1:6), the composition thickens and increases in viscosity to produce an end-use composition having a viscosity of 1,000 to 20,000 cps (preferably 2,000 to 15,000 cps, most preferably 3,000 to 12,000 cps).

[0013] In a second aspect, the present invention relates to a hydratable concentrated surfactant composition according to the first aspect of the invention, wherein the composition transforms from a lamellar form to an isotropic form (ie a microstructure) upon dilution.

[0014] In a third aspect, the present invention is directed to a hydratable concentrated surfactant composition having a viscosity of 25 to 10,000 cps, wherein the composition is suitable for dilution with water at a composition to water weight ratio of 1:1 to 1:10 to produce an end use composition having a viscosity of 1,000 to 20,000 cps, and further wherein the hydratable composition comprises:

[0015] a) anionic surfactants comprising acyl isethionates;

[0016] b) amphoteric and / or zwitterionic surfactants;

[0017] c) C6-C 14 an acid or alcohol structurant; and

[0018] d) 30 to 85% by weight of water,

[0019] The viscosity of the end use composition is greater than that of the hydratable concentrated surfactant composition.

[0020] In a fourth aspect, the present invention is directed to an end-use composition prepared by diluting at least one of the hydratable concentrate surfactant compositions of the first three aspects of the present invention.

[0021] In a fifth aspect, the present invention relates to the use of the end-use composition of the fourth aspect of the present invention for cosmetically treating the skin.

[0022] As used herein, "composition" without qualifiers refers to the hydratable composition and the final use composition of the present invention. As used herein, hydratable means adding and / or adding and absorbing water (i.e., diluting) to even obtain a composition with water, such as a composition initially 30 to 85% by weight of water. As used herein, skin means skin including arms (including underarms), face, feet, neck, chest, hands, legs, buttocks and scalp (including hair). A hydratable concentrated surfactant composition ("hydratable composition") refers to a lamellar composition whose viscosity increases when water is added to the composition to produce an isotropic final use composition suitable for topical application. A hydratable composition is a composition even suitable for having a viscosity of 500 to 1,500 cps (1 Pa-s equals 1000 cps). This final use composition is a composition suitable for wiping or washing off (and preferably, washing off with water). The final use composition can be a household care cleaning composition, but is preferably a shampoo, lotion, facial cleanser, hand soap or personal care liquid body wash. In one embodiment of the present invention, the end-use composition may have a viscosity of 6,000 to 12,000 cps when bathing and a viscosity of 2,000 to 5,000 cps when washing hands. The end-use composition may optionally contain a medicament or therapeutic agent, but preferably, it is a cosmetic and non-therapeutic lotion. In one embodiment of the present invention, the end-use composition is a home care composition, such as a desktop or toilet cleaning composition. In another embodiment, the end-use composition is a shampoo composition. In yet another embodiment, the end-use composition is a personal washing composition, and therefore a liquid shower gel. As described below, the end-use composition of the present invention may optionally contain skin benefit ingredients added thereto, such as emollients, vitamins and / or derivatives thereof, resorcinols, retinoic acid precursors, colorants, moisturizers, sunscreens, mixtures thereof, etc. The skin benefit ingredients (or agents) may be water-soluble or oil-soluble. If used, oil-soluble skin benefit agents typically account for 1.5% by weight of the hydratable composition, while water-soluble skin benefit agents typically account for 10% by weight of the hydratable composition of the present invention when used. The hydratable compositions and end use compositions typically have a pH of 4.5 to 10. Unless otherwise stated, viscosities are measured using a Discovery HR-2 Rheometer using a sandblasted plate with a 100 micron gap and 4-15 s -1The viscosity is measured at 25°C. The viscosity increase means that the initial viscosity of the hydratable composition of the present invention will be lower than the final viscosity after adding water and preparing the resulting final use composition. The final use composition is prepared by combining water and a hydratable composition and mixing them (with medium shear such as stirring, preferably shaking) to produce a final use composition having a higher viscosity than the hydratable concentrate from which it is made. In another embodiment, the hydratable composition can be directly applied to, for example, a consumer, and when water and shear forces (such as shearing by hand and water from a sink or shower) are applied, the desired final use composition can be made. As used herein, "substantially free of sulfate" means less than 6.0% by weight of the final use composition, and "substantially free of oil" means less than 0.3% by weight of the final use composition. The term "comprising" is intended to encompass the terms "consisting essentially of" and "consisting of". To avoid doubt and for illustration, the final use composition of the present invention comprising surfactants, water and active substances is intended to include compositions consisting essentially of them and compositions consisting of them. All ranges defined are intended to include all ranges contained therein. Except in the operating comparative examples, or where otherwise expressly indicated, all numbers in this description indicating amounts or ratios of materials or conditions of materials and / or use and / or physical properties are to be understood as modified by the word "about".

[0023] Preferred Embodiments

[0024] For anionic surfactants, they generally comprise 0.05 to 30% by weight of the hydratable composition, including all ranges contained therein. In one embodiment of the invention, the anionic surfactant comprises 0.5 to 25% by weight of the hydratable composition, preferably 0.8 to 20% by weight, including all ranges contained therein. In still another embodiment, the anionic surfactant comprises 12 to 18% by weight of the hydratable composition, including all ranges contained therein. In another embodiment, 15 to 100% by weight, preferably 30 to 85% by weight, and most preferably 35 to 80% by weight of the anionic surfactant, based on the total weight of the anionic surfactant, is acyl isethionate, and including all ranges contained therein. In yet another embodiment, the acyl isethionate is used together with another anionic surfactant, which preferably comprises acyl taurates (defined as comprising acyl C 1-4When an anionic surfactant other than isethionate is used, in a generally preferred embodiment the additional anionic surfactant is an acyl taurate, which may generally comprise from 40 to 85 wt %, preferably from 50 to 82 wt %, and most preferably from 60 to 80 wt %, based on the weight of the total anionic surfactant in the hydratable composition.

[0025] For use in the hydratable composition, amphoteric and / or zwitterionic surfactants generally comprise from 0.1 to 45 weight percent, preferably from 0.5 to 35 weight percent, most preferably from 12 to 25 weight percent of the hydratable composition, including all ranges subsumed therein.

[0026] For example, to aid in the structuring and hydration of the hydratable composition, it may be preferred to use a structuring agent such as C6-C 14 The structuring agent is preferably a structuring agent selected from the group consisting of C6-C 14 Fatty acids, C6-C 14 Fatty alcohol, C6-C 14 Fatty amides and mixtures thereof, and may comprise from 0.1 to 16 weight percent, preferably from 1.8 to 12 weight percent, and most preferably from 3 to 8 weight percent of the hydratable composition, including all ranges subsumed therein.

[0027] Inorganic salts are optional but often required ingredients that aid in thickening the composition. Typical salts such as NaCl, KCl, MgCl2, CaCl2, mixtures thereof, etc. can be used. Typically, the inorganic salt comprises 0 to 15 wt %, preferably 1 to 12 wt %, and most preferably 0.75 to 4.5 wt %, of the hydratable composition, including all ranges subsumed therein.

[0028] In the hydratable compositions of the present invention, polymeric viscosity aids are optional but generally desired ingredients. Preferred polymers are those generally classified as high molecular weight ethoxylated fatty acid esters. Illustrative examples include PEG 120 methyl glucose dioleate, PEG 18 glyceryl oleate / cocoate, PEG 150 pentaerythritol tetrastearate, mixtures thereof, and the like. A generally preferred polymeric viscosity aid is PEG 150 pentaerythritol tetrastearate, which is sold by Croda under the name Versathix. When used, such aids comprise 0.01 to 0.8 weight percent, preferably 0.1 to 0.5 weight percent, and most preferably 0.15 to 0.3 weight percent, based on the weight of the hydratable composition, including all ranges subsumed therein.

[0029] In another embodiment of the present invention, less than 3.0 wt% sulfate is present in the end-use composition of the present invention, preferably less than 1.0 wt%, and most preferably no sulfate is present (0.0 wt%). In the present invention, the hydratable composition should be formulated so that upon dilution, the desired component / ingredient level (e.g., sulfate level) is achieved in the end-use composition.

[0030] For anionic surfactants suitable for use in the hydratable compositions and end-use compositions of the present invention, the anionic surfactants used may include fatty sulfonates, such as primary alkanes (e.g., C8-C 22 ) sulfonates, primary alkanes (e.g., C8-C 22 ) disulfonate, C8-C 22 Olefin sulfonates, C8-C 22 Hydroxyalkane sulfonate or alkyl glyceryl ether sulfonate (AGS); or aromatic sulfonate, such as alkylbenzene sulfonate. The anion can also be an alkyl sulfate (such as C 12 -C 18 Alkyl sulfates) or alkyl ether sulfates (including alkyl glyceryl ether sulfates). Alkyl ether sulfates include those having the formula:

[0031] RO(CH2CH2O) n SO3M

[0032] wherein R is an alkyl or alkenyl group having 8 to 18 carbons, preferably 12 to 18 carbons, n has an average value of at least 1.0, preferably less than 5, most preferably 1 to 4, and M is a solubilizing cation such as sodium, potassium, ammonium or substituted ammonium.

[0033] Anions may also include alkyl sulfosuccinates (including monoalkyl and dialkyl, such as C6-C 22 sulfosuccinates); alkyl and acyl taurates (usually methyl taurate), alkyl and acyl sarcosinates, sulfoacetates, C8-C 22 Alkyl phosphates and phosphonates, alkyl phosphate esters and alkoxyalkyl phosphate esters, acyl lactylates, C8-C 22 Monoalkyl succinates and maleates, sulfoacetates, alkyl glucosides and acyl isethionates, etc.

[0034] The sulfosuccinate may be a monoalkyl sulfosuccinate having the formula:

[0035] R 1 O2CCH2CH(SO3M)CO2M;

[0036] and the amide-MEA sulfosuccinate of the formula:

[0037] R1 CONHCH2CH2O2CCH2CH(SO3M)CO2M, where R 1 The range is C8-C 22 alkyl.

[0038] Sarcosinate is generally represented by the following formula:

[0039] R 2 CON(CH3)CH2CO2M, where R 2 Range: C8-C 20 alkyl.

[0040] Taurate is generally determined by the following formula:

[0041] R 3 CONR 4 CH2CH2SO3M,

[0042] Where R 3 It is C8-C 20 Alkyl, R 4 It is a C1-C4 alkyl group.

[0043] M is a solubilizing cation as previously described.

[0044] Isethionates that can be used include C8-C 18 Acyl isethionates (including those having substituted head groups such as C 1-4 These esters are prepared by the reaction of an alkali metal isethionate with mixed aliphatic fatty acids having from 6 to 18 carbon atoms and an iodine value of less than 20. Typically at least 75% of the mixed fatty acids have from 12 to 18 carbon atoms and up to 25% have from 6 to 10 carbon atoms.

[0045] The acyl isethionate used may be an alkoxylated isethionate, such as described in Ilardi et al., U.S. Patent No. 5,393,466, entitled "Fatty Acid Esters of Polyalkoxylated isethonic acid"; issued February 28, 1995; incorporated herein by reference. The compound has the following general formula:

[0046] R 5 CO(O)-C(X)HC(Y)H-(OCH2-CH2) m -SO3M,

[0047] Where R 5is an alkyl group having 8 to 18 carbons, m is an integer from 1 to 4, X and Y are each independently hydrogen or an alkyl group having 1 to 4 carbons, and M is a solubilizing cation as described above.

[0048] In one embodiment of the present invention, the anionic surfactant used is sodium lauroyl glycinate, sodium cocoyl glycinate, sodium lauroyl glutamate, sodium cocoyl glutamate, sodium lauroyl isethionate, sodium cocoyl isethionate, sodium methyl lauroyl taurate, sodium methyl cocoyl taurate, or mixtures thereof. Such anionic surfactants are commercially available from suppliers such as Galaxy Surfactants, Clariant, Sino Lion, and Innospec. Sodium cocoyl isethionate, sodium methyl lauroyl taurate, sodium lauroyl gluconate, sodium methyl lauroyl isethionate, or mixtures thereof are preferred anionic surfactants suitable for use.

[0049] Suitable amphoteric surfactants for use in the present invention (which may be zwitterionic, depending on the pH) include sodium acylamidoacetate, sodium acylamidopropionate, disodium acylamidodiacetate and disodium acylamidodipropionate, wherein the acyl group (i.e., the alkanoyl group) may contain C7 to C 18 Alkyl moiety. Illustrative examples of suitable amphoteric surfactants include sodium lauryl amphoacetate, sodium cocoamphoacetate, sodium lauryl amphoacetate, sodium cocoamphoacetate, and mixtures thereof.

[0050] For zwitterionic surfactants useful in the present invention, such surfactants include at least one acid group. This acid group can be a carboxylic acid or a sulfonic acid group. They typically include quaternary nitrogen and can therefore be quaternary amino acids. They typically should contain alkyl or alkenyl groups of 7 to 18 carbon atoms, typically conforming to the following overall structural formula:

[0051] R 6 -[-C(O)-NH(CH2) q -] r -N + -(R 7 -)(R 8 )AB, where R 7 is an alkyl or alkenyl group of 7 to 18 carbon atoms; R 7 and R 8 Each is independently an alkyl group of 1 to 3 carbon atoms, a hydroxyalkyl group or a carboxyalkyl group; q is 2 to 4; r is 0 to 1; A is an alkylene group of 1 to 3 carbon atoms optionally substituted by a hydroxy group, and B is -CO2- or -SO3-.

[0052] Suitable zwitterionic surfactants for use herein and within the above formula include simple betaines of the formula:

[0053] R6 -N + -(R 7 )(R 8 )CH2CO2 -

[0054] and amide betaines of the formula:

[0055] R 6 -CONH(CH2) t -N + -(R 7 )(R 8 )CH2CO2 - , where t is 2 or 3.

[0056] In both formulas, R 6 , R 7 and R 8 is defined as above. 6 In particular, C derived from coconut oil may be 12 and C 14 mixture of alkyl groups such that at least half, preferably at least three quarters, of the groups R 6 Has 10 to 14 carbon atoms. 7 and R 8 Preferred is methyl.

[0057] Another possibility is that the zwitterionic surfactant is a sulfobetaine of the formula:

[0058] R 6 -N + -(R 7 )(R 8 )(CH2)3SO3 - ,

[0059] or

[0060] R 6 -CONH(CH2) u -N + -(R 7 )(R 8 )(CH2)3SO3 - ,

[0061] Where u is 2 or 3, or where -(CH2)3SO3 - -CH2C(OH)(H)CH2SO3 - Alternative variants thereof.

[0062] In these formulas, R 6 , R 7 and R 8 As defined above.

[0063] Illustrative examples of zwitterionic surfactants suitable for use include betaines, such as cocodimethyl carboxymethyl betaine, cocamidopropyl betaine and lauryl amidopropyl betaine. Suitable additional zwitterionic surfactants include cocamidopropyl sulfobetaine. Such surfactants are commercially available from suppliers such as Stepan Company, and mixtures of the above surfactants are also within the scope of the present invention. In a preferred embodiment, the zwitterionic surfactant used in the present invention is cocamidopropyl betaine.

[0064] Nonionic surfactants may optionally be used in the hydratable compositions and end-use compositions of the present invention. When used, nonionic surfactants are typically used in amounts as low as 0.5, 1, 1.5, or 2 weight percent, and as high as 6, 8, 10, or 12 weight percent of the end-use composition. Nonionic surfactants that may be used include, among others, the reaction products of compounds having a hydrophobic group and an active hydrogen atom (e.g., a fatty alcohol, an acid, an amide, or an alkylphenol) and an alkylene oxide (especially ethylene oxide alone or with propylene oxide). Specific nonionic surfactant compounds are alkyl (C6-C 22 )phenol ethylene oxide condensation products, aliphatic (C8-C 18 ) condensation products of primary or secondary straight or branched chain alcohols with ethylene oxide and products prepared 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 sulfoxides, etc.

[0065] In one embodiment of the present invention, the optional nonionic surfactant may include a fatty acid / alcohol ethoxylate having the following structure: a) HOCH2(CH2) s (CH2CH2O) v H or b) HOOC(CH2) c (CH2CH2O) d H; wherein s and v are each independently an integer of up to 18; c and d are each independently an integer of 1 or greater. In one embodiment of the present 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) z H, wherein i, k are each independently 5 to 15; and z is 5 to 50. In another embodiment of the present invention, i and k are each independently 6 to 12; and z is 15 to 35.

[0066] Nonionic surfactants can also include sugar amides, such as polysaccharide amides. Specifically, the surfactant can be one of the lactobionamides described in U.S. Patent No. 5,389,279, titled "Compositions Comprising Nonionic Glycolipid Surfactants", issued to Au et al. on February 14, 1995, which is incorporated herein by reference, or one of the sugar amides described in U.S. Patent No. 5,009,814, titled "Use of N-Poly Hydroxyalkyl Fatty Acid Amides as Thickening Agents for Liquid Aqueous Surfactant Systems", issued to Kelkenberg on April 23, 1991; the application is incorporated herein by reference at this point.

[0067] In one embodiment of the present invention, cationic surfactants may optionally be used in the hydratable compositions and end-use compositions of the present invention.

[0068] One class of optional cationic surfactants includes heterocyclic ammonium salts such as cetyl or stearyl pyridinium chloride, alkylamidoethylpyrroline methyl sulfate and lapidium chloride.

[0069] Tetraalkylammonium 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 trimethyl ammonium halides; behenyl trimethyl ammonium halides or methyl ammonium sulfate; decyl isononyl dimethyl ammonium halides; ditallow (or distearyl) dimethyl ammonium halides and behenyl dimethyl ammonium chloride.

[0070] Other types of cationic surfactants that can be used are various ethoxylated quaternary amines and esterquats. 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 stearamidopropyl dimethylamine lactylate.

[0071] Even other useful cationic surfactants suitable for optional use include quaternized hydrolysates of silk, wheat and keratin, and it is within the scope of the present invention to use mixtures of the above cationic surfactants.

[0072] If used, cationic surfactants will comprise no more than 1.0 weight percent of the hydratable composition. When present, they typically comprise from 0.01 to 0.7 weight percent, more typically from 0.1 to 0.5 weight percent of the final use composition, including all ranges subsumed therein.

[0073] In one embodiment of the invention, the end-use compositions of the invention will be substantially free of polymeric quaternary ammonium compounds (including salts thereof). In another embodiment, the end-use compositions will contain less than 0.1 wt. % of polymeric quaternary ammonium compounds. In yet another embodiment, the end-use compositions contain less than 0.01 wt. % of polymeric quaternary ammonium compounds. In yet another embodiment, the hydratable compositions and end-use compositions contain no polymeric quaternary ammonium compounds (i.e., 0.0%).

[0074] Water preferably comprises 35 to 75 weight percent of the hydratable composition, most preferably 40 to 70 weight percent water, based on the total weight of the hydratable composition, including all ranges subsumed therein.

[0075] The pH of the hydratable composition and the final use composition is generally 4.5 to 10, preferably 5 to 9, and most preferably 5.2 to 7.5, including all ranges subsumed therein. Adjusters suitable for changing / buffering the pH value may be used. Such pH adjusters include triethylamine, NaOH, KOH, H2SO4, HCl, C6H8O7 (i.e., citric acid), or mixtures thereof. The pH adjuster is added in an amount to produce the desired final pH. The pH value can be assessed using commercial instruments, such as those available from Thermo A commercially available pH meter was obtained.

[0076] Optional skin benefit agents are suitable for use herein only to the extent that they are capable of being topically applied and are suitably soluble in the hydratable composition and the end use composition at the desired pH.

[0077] Illustrative examples of beneficial agents suitable for inclusion in the water portion of the composition are acids, such as amino acids, for example arginine, valine or histidine. Other water-soluble beneficial agents suitable include vitamin B2, niacinamide (vitamin B3), vitamin B6, vitamin C, mixtures thereof, etc. Water-soluble derivatives of these vitamins may also be used. For example, vitamin C derivatives such as ascorbyl tetraisopalmitate, magnesium ascorbyl phosphate and ascorbyl glycosides may be used alone or in combination with one another. Other water-soluble beneficial agents suitable include 4-ethylresorcinol, extracts such as sage, aloe, green tea, grape seed, thyme, chamomile, yarrow, cucumber, licorice, rosemary extracts or mixtures thereof. Water-soluble sunscreens may also be used, such as ensuliazole. When present in the present invention, the total amount of optional water-soluble beneficial agents (including mixtures) may be 0.0 to 10% by weight, preferably 0.001 to 8% by weight, and most preferably 0.01 to 6% by weight, based on the total weight of the end-use composition, including all ranges contained therein.

[0078] It is also within the scope of the present invention to optionally include oil (i.e., non-aqueous) soluble benefit agents. The end-use composition is substantially oil-free and preferably has less than 0.15% by weight of oil, most preferably oil-free (0.0%), wherein oil does not mean any oil from a fragrance. Thus, oil-soluble actives or benefit agents are dissolved in the surfactant used. The only limitation for such oil-soluble benefit agents is that they are suitable for providing a beneficial effect when applied topically. The composition preferably has less than 0.15% petrolatum (petrolatum), more preferably does not contain petrolatum.

[0079] Illustrative examples of the types of oil-soluble benefit agents that may be optionally used in the compositions of the present invention include components such as stearic acid, vitamins such as vitamins A, D, E and K (and their oil-soluble derivatives), sunscreens such as ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenol triazine, 2-ethylhexyl-2-cyano-3,3-diphenyl-2-propionic acid, drometrizole trisiloxane, 3,3,5-trimethylcyclohexyl 2-hydroxybenzoate, 2-ethylhexyl-2-hydroxybenzoate, or mixtures thereof.

[0080] Other optional oil-soluble benefit agents suitable for use include resorcinols such as 4-hexylresorcinol, 4-phenylethylresorcinol, 4-cyclopentylresorcinol, 4-cyclohexylresorcinol, 4-isopropylresorcinol or mixtures thereof. In addition, 5-substituted resorcinols such as 4-cyclohexyl-5-methylbenzene-1,3-diol, 4-isopropyl-5-methylbenzene-1,3-diol, mixtures thereof, etc. can be used. 5-substituted resorcinols and their synthesis are described in commonly assigned U.S. Published Patent Application No. 2016 / 0000669A1.

[0081] Even other suitable oil-soluble actives include omega-3 fatty acids, omega-6 fatty acids, climbazole, farnesol, ursolic acid, myristic acid, geranylgeraniol, oleyl betaine, cocoyl hydroxyethyl imidazoline, hexanoyl sphingosine, 12-hydroxystearic acid, petroselinic acid, conjugated linoleic acid, terpineol, thymol, mixtures thereof, and the like.

[0082] In one embodiment of the present invention, the optional oil-soluble beneficial agent used is a retinoic acid precursor. In one embodiment of the present invention, the retinoic acid precursor is retinol, retinal, retinyl propionate, retinyl palmitate, retinyl acetate or a mixture thereof. Retinyl propionate, retinyl palmitate and a mixture thereof are generally preferred.

[0083] Yet another retinoic acid precursor suitable for use is supplied by Molecular Design International under the name Commercially available hydroxyanasatil retinoate. It can be used in combination with the oil-soluble active ingredients described herein.

[0084] When an optional oil-soluble active is used in the composition of the present invention, it generally comprises 0.0 to 1.5 weight percent of the final use composition, preferably 0.001 to 1.5 weight percent, and most preferably 0.05 to 1.2 weight percent. In yet another embodiment, the oil comprises 0.1 to 0.5 weight percent of the total weight of the final use composition, including all ranges subsumed therein.

[0085] Ideally, preservatives can be added to the hydratable concentrate and the end-use composition to prevent the growth of potentially harmful microorganisms. Cosmetic chemists are familiar with suitable preservatives and typically select them to meet preservative challenge tests and provide product stability. Suitable traditional preservatives include hydantoin derivatives and propionates. Particularly preferred preservatives are iodopropynyl butyl carbamate, phenoxyethanol, 1,2-octanediol, hydroxyacetophenone, ethylhexylglycerin, hexylene glycol, methylparaben, propylparaben, imidazolidinyl urea, sodium dehydroacetate, dimethyl-dimethyl (DMDM) hydantoin and benzyl alcohol, and mixtures thereof. Other suitable preservatives include sodium dehydroacetate, chlorphenesin and decanediol. The selection of preservatives should take into account the use of the composition and possible incompatibility between the preservative and other ingredients in the emulsion. The preservative is preferably used in an amount of 0.01% to 2.0% by weight of the total weight of the final use composition (up to 7% by weight of the total weight of the hydratable composition), including all ranges subsumed therein. Also preferred are preservative systems containing hydroxyacetophenone alone or in admixture with other preservatives.

[0086] Thickeners are optionally suitable for use in the compositions of the present invention. Particularly useful are polysaccharides. Examples include fibers, starches, natural / synthetic gums, and celluloses. Representative starches are chemically modified starches, such as hydroxypropyl starch sodium phosphate and aluminum starch octenyl succinate. Tapioca starch is generally preferred, as is maltodextrin. Suitable gums include xanthan gum, sclerotium, pectin, karaya gum, gum arabic, agar, guar gum (including Acacia senegal guar gum), carrageenan, alginate, and combinations thereof. Suitable celluloses include hydroxypropyl cellulose, hydroxypropyl methylcellulose, ethyl cellulose, sodium carboxymethyl cellulose (cellulose gum / carboxymethyl cellulose), and cellulose (e.g., cellulose microfibrils, cellulose nanocrystals, or microcrystalline cellulose). The sources of cellulose microfibrils include secondary cell wall materials (e.g., wood pulp, cotton), bacterial cellulose, and primary cell wall materials. Preferably, the source of primary cell wall material is selected from the group consisting of parenchymal tissue from fruits, roots, bulbs, tubers, seeds, leaves and combinations thereof; more preferably selected from the group consisting of citrus fruit, tomato fruit, peach fruit, pumpkin fruit, kiwi fruit, apple fruit, mango fruit, beet, beetroot, radish, parsnip, corn, oats, wheat, peas and combinations thereof; even more preferably selected from the group consisting of citrus fruit, tomato fruit and combinations thereof. The most preferred source of primary cell wall material is parenchymal tissue from citrus fruit. Citrus fiber, for example, Those manufactured with AQ Plus can also be used as a source of cellulose microfibers. The cellulose source can be surface modified by any known method, including those described in Colloidal Polymer Science, Kalia et al., "Nanofibrillated cellulose: surface modification and potential applications" (2014), Vol. 292, pp. 5-31.

[0087] In addition to polymeric viscosity building agents, synthetic polymers are another class of effective thickeners that may be optionally used. This class includes cross-linked polyacrylates (e.g., Carbomers), polyacrylamides (e.g., 305) and taurate copolymers (e.g., EG and AVC), identified by INCI nomenclature as copolymers of sodium acrylate / sodium acryloyldimethyl taurate and acryloyldimethyl taurate / vinyl pyrrolidone copolymer, respectively. Another preferred synthetic polymer suitable for thickening is an acrylate-based polymer manufactured by Seppic and sold under the name Simulgel INS 100. Calcium carbonate, fumed silica and magnesium aluminum silicate may also be used.

[0088] When used, the amount of optional thickeners may range from 0.001 to 5% by weight of the composition.Maltodextrin, xanthan gum and carboxymethylcellulose are generally preferred optional thickeners.

[0089] The compositions of the present invention may optionally include fragrances, fixatives, chelating agents (such as EDTA), and exfoliants. Each of these substances may range from about 0.03 to about 5% by weight of the total weight of the final use composition, preferably 0.1 to 3% by weight, including all ranges subsumed therein. With respect to the exfoliants used, those selected should have a sufficiently small particle size so that they do not interfere with the performance of any packaging used to dispense the compositions of the present invention.

[0090] Conventional emulsifiers having an HLB greater than 8 may optionally be used. Illustrative examples include Tween 40, 60, 80, polysorbate 20, and mixtures thereof. Typically, emulsifiers used in water continuous systems comprise 0.3 to 2.5 weight percent of the final use composition.

[0091] Conventional moisturizers can be optionally used as additives in the present invention to help moisturize the skin when such emulsions are topically applied. These are generally polyol materials. Typical polyols include glycerol (i.e., glycerol or 1,2,3-propanetriol), propylene glycol, dipropylene glycol, polypropylene glycol (e.g., PPG-9), polyethylene glycol, sorbitol, hydroxypropyl sorbitol, hexylene glycol, 1,3-butylene glycol, isopentyl glycol, 1,2,6-hexanetriol, ethoxylated glycerol, propoxylated glycerol, and mixtures thereof. Glycerol, propylene glycol, or mixtures thereof are most preferred. The amount of moisturizer used can be in any range of 0.0 to 35% by weight of the total weight of the composition. Typically, the moisturizer accounts for 0.0 to 20% by weight of the total weight of the end-use composition, preferably 0.001 to 15% by weight (most preferably 2 to 12% by weight).

[0092] For the end-use composition of the present invention, it generally has 1 to 35 wt %, preferably 2 to 30 wt %, most preferably 3 to 16 wt % total surfactant based on the total weight of the end-use composition, including all ranges subsumed therein. In one embodiment of the present invention, the end-use composition comprises 7 to 10 wt % total surfactant based on the total weight of the end-use composition, including all ranges subsumed therein.

[0093] The present invention relates to a hydratable concentrated surfactant composition that thickens and thus exhibits an increase in viscosity when mixed and diluted with water. In one embodiment of the present invention, when the weight percentage of zwitterionic surfactant to the weight percentage of anionic surfactant in the composition exceeds 3:1, the presence of a structuring agent (e.g., lauric acid) should exceed 15 weight percent of the total weight of surfactants in the composition. In addition, in another embodiment of the present invention, when the weight ratio of zwitterionic surfactant to anionic surfactant is less than 1.5, the structuring agent accounts for 27 weight percent or less of the total weight of surfactants in the composition. In another embodiment, when the weight percentage of zwitterionic surfactant to the weight percentage of anionic surfactant in the composition exceeds 3:1, the presence of a structuring agent (e.g., lauric acid) should exceed 15 weight percent of the total weight of surfactants in the composition, and when the weight ratio of zwitterionic surfactant to anionic surfactant is less than 1.5, the structuring agent accounts for 27 weight percent or less of the total weight of surfactants in the composition.

[0094] When preparing the hydratable composition of the present invention, the required ingredients can be mixed with conventional equipment under moderate shear and atmospheric conditions, and the temperature is 35 to 80°C. Water is added to the hydratable composition to produce the final use composition. Moderate shear, such as shaking (or stirring) in the container will produce the final use composition in less than 5 minutes, preferably less than 3 minutes, and most preferably less than 2 minutes. In one embodiment of the present invention, the final use composition is made in less than 1 minute, even preferably less than 30 seconds.

[0095] Thus, in another aspect, the present invention relates to a method of preparing an end-use composition, the method comprising the step of diluting a hydratable composition of the present invention with water. Preferably, the composition is diluted in a weight ratio of composition to water of 1:1 to 1:10. The viscosity of the hydratable concentrated surfactant composition is 25 to 10,000 cps and increases in viscosity upon dilution, resulting in an end-use composition having a viscosity of 1,000 to 20,000 cps. Viscosity is measured using a Discovery HR-2 rheometer using a sandblasting plate with a 100 micron gap and 4-15 s -1 The shear rate is measured at a temperature of 25°C. Preferred aspects of the end-use composition have been described above.

[0096] The packaging for the composition is generally not limited, as long as the hydratable composition can be hydrated and the end-use composition can be made when water is added. In one embodiment of the invention, the hydratable composition is sold in a pouch or box, which is associated with and inserted into a bottle or can. The bottle or can is filled with water and allows the hydratable composition to be released therein to mix with water. Typically, the bottle or can has a lid with a pump that opens the pouch or can to release the hydratable composition into the water to make the end-use composition. This hydratable composition unexpectedly produces an end-use composition, such as a shower gel, which has the desirable properties of a consumer's favorable review. Packaging allows an unlimited number of refills to consistently reduce plastic waste in the environment.

[0097] The hydratable concentrate composition is preferably packaged in a refill package.Preferably, the hydratable concentrate composition is used as a refill composition.

[0098] The examples provided are to facilitate the understanding of the present invention. It is not intended to limit the scope of the claims. Example

[0099] All compositions presented in each sample of the Examples as listed in the Tables were prepared by conventional means, thus by mixing the ingredients with moderate shear at a temperature of about 35 to 75°C under atmospheric conditions. The compositions (i.e., the end-use / dilution compositions) were made to contain about 0.6% by weight of fragrance and 0.8% by weight of preservative. The hydratable compositions were diluted (water was added to the composition) at a weight ratio of 3 to 1, except that the compositions of Samples 14 and 17 were diluted at a water to hydratable composition ratio of 2 to 1 and the composition of Sample 16 was diluted at a water to hydratable composition ratio of 3.5 to 1. For the avoidance of doubt, "concentrated viscosity" refers to the viscosity of the hydratable composition, and "diluted viscosity" refers to the viscosity of the finished end-use cleaning composition, both in centipoise (cps). The water and hydratable composition were mixed in a container and stirred with gentle agitation. In less than one (1) minute, the desired cleaning composition was unexpectedly obtained.

[0100] surface

[0101]

[0102]

[0103]

[0104]

[0105]

[0106]

[0107] surface

[0108]

[0109]

[0110]

[0111]

[0112]

[0113] CAPB-Cocamidopropyl Betaine

[0114] Isethionate-Sodium Cocoyl Isethionate; Methyl Isethionate-Sodium Methyl Lauroyl Isethionate

[0115] Taurate - Sodium Methyl Lauroyl Taurate

[0116] Versathix-PEG 150 Pentaerythrityl Tetrastearate

[0117] Comparative Examples - Comparative Examples

[0118] From the data provided, it can be seen that hydratable compositions made in accordance with the present invention are prepared in less than one (1) minute of stirring and they unexpectedly thicken (increase in viscosity) when mixed with water.

Claims

1. A hydratable concentrated and lamellar surfactant composition comprising: a) an anionic surfactant comprising acyl isethionate and further comprising acyl taurate, wherein the acyl taurate accounts for 40 to 85% by weight of the total anionic surfactant, wherein the acyl isethionate is selected from C8-C 18 Acyl isethionate, C8-C 18 Acyl isethionate is optionally composed of C 1-4 Alkyl substituted, and wherein the acyl taurate is selected from sodium methyl lauroyl taurate, sodium methyl cocoyl taurate, or a combination thereof; b) an amphoteric or zwitterionic surfactant, wherein the amphoteric or zwitterionic surfactant is a betaine surfactant; c) a structuring agent selected from myristic acid, lauric acid, or a combination thereof; and d) 30 to 85% by weight of water, When using the Discovery HR-2 rheometer with a 100 μm gap and a 4-15 s -1 The composition has a viscosity of 25 to 10,000 cps when measured at a shear rate of 25°C, and further in the weight ratio of the amphoteric or zwitterionic surfactant to the anionic surfactant is less than 1.5, and the structurant accounts for 27 weight % or less of the total weight of surfactants in the composition, or wherein the weight ratio of the amphoteric or zwitterionic surfactant to the anionic surfactant is not less than 1.

5.

2. The hydratable concentrate and lamellar surfactant composition of claim 1, wherein the hydratable concentrate and lamellar surfactant composition is substantially free of oil and sulfate, wherein "substantially free of oil" means less than 0.3 wt. % by weight of the end use composition and "substantially free of sulfate" means less than 6.0 wt. % by weight of the end use composition.

3. The hydratable concentrate and lamellar surfactant composition of claim 1, wherein the hydratable concentrate and lamellar surfactant composition is free of oil and sulfate.

4. The hydratable concentrated and lamellar surfactant composition according to any one of claims 1 to 3, wherein the anionic surfactant comprising acyl isethionates and acyl taurates further comprises acyl glycinates.

5. The hydratable concentrate and lamellar surfactant composition according to any one of claims 1 to 3, wherein the structurant is lauric acid.

6. The hydratable concentrate and lamellar surfactant composition according to any one of claims 1 to 3, wherein the composition is packaged in a refill package.

7. The hydratable concentrate and lamellar surfactant composition of any one of claims 1 to 3, wherein the viscosity of the composition increases when diluted with water in a weight ratio of composition to water of 1:1 to 1:

10.

8. The hydratable concentrated and lamellar surfactant composition according to any one of claims 1 to 3, wherein the C 1-4 The alkyl group is methyl.

9. The hydratable concentrated and lamellar surfactant composition according to any one of claims 1 to 3, wherein the acyl isethionate is selected from sodium cocoyl isethionate, sodium methyl lauroyl isethionate or a combination thereof.

10. The hydratable concentrated and lamellar surfactant composition according to any one of claims 1 to 3, wherein the acyl taurate is sodium methyl lauroyl taurate.

11. The hydratable concentrated and lamellar surfactant composition according to any one of claims 1 to 3, wherein the amphoteric or zwitterionic surfactant is selected from cocodimethylcarboxymethyl betaine, cocamidopropyl betaine, laurylamidopropyl betaine, cocamidopropyl sultaine or a combination thereof.

12. The hydratable concentrated and lamellar surfactant composition according to any one of claims 1 to 3, wherein the amphoteric or zwitterionic surfactant is cocamidopropyl betaine.

13. A method of preparing an end-use composition, wherein the method comprises the steps of: The hydratable concentrated and lamellar surfactant composition according to any one of claims 1 to 12 is hydrated at a weight ratio of composition to water of 1:1 to 1:10 to provide an end-use composition that is isotropic and has a higher viscosity than the viscosity of the hydratable concentrated and lamellar surfactant composition prior to hydration.

14. An end-use composition which is a personal wash composition or a home care composition prepared by the process of claim 13.

15. The end-use composition of claim 14, wherein the end-use composition is substantially free of oil, i.e., less than 0.3 wt. % by weight of the end-use composition, and substantially free of sulfate, i.e., less than 6.0 wt. % by weight of the end-use composition, has a pH of 4.5 to 10, and is prepared by mixing with water within 5 minutes.

16. The end-use composition according to claim 14 or 15, wherein the end-use composition is isotropic.

17. The end-use composition of claim 14 or 15, wherein the end-use composition transforms to an isotropic form upon hydration of the hydratable concentrated and lamellar surfactant composition according to any one of claims 1 to 12.

18. The end-use composition of claim 14 or 15, wherein when tested with a Discovery HR-2 rheometer using a sandblasting plate with a 100 micron gap and 4-15 s -1 The viscosity of the end-use composition is 1,000 to 20,000 cps when measured at a shear rate of 25°C.

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