Hydrable concentrated composition containing a surfactant and containing a low or non of a palman number oil-

Abstract

The present invention relates to a hydratable concentrated surfactant composition. The compositions are pourable, readily diluted, substantially free of sulfates and oils, comprise small or no palm kernel oil-derived structuring agents, comprise anionic surfactants and amphoteric surfactants, zwitterionic surfactants, or both. The composition is in a layered phase, and when diluted, thickens and transitions to an isotropic phase. The composition may be used in small amounts as a concentrate and diluted according to use and need, or may be diluted with water in a refill package to ensure a reduction in plastic waste.

Description

Technical Field

[0001] The present invention relates to a hydratable and lamellar concentrated composition comprising a surfactant and a structuring agent derived from palm kernel oil in small amounts or not at all. The composition is pourable, substantially free of at least one of sulfate, paraben, hydantoin, isothiazolone, dioxane and oil, and comprises C 12 -C 20 -lactate, an anionic surfactant and an amphoteric surfactant, an amphoteric ion surfactant or both. The concentrated composition is in a lamellar phase and thickens and transforms into an isotropic washing composition upon dilution. The composition can be used as a small amount of concentrate and diluted as needed, or can be diluted with water in a refill pack to ensure reduction of plastic waste. Background Art

[0002] Liquid-based cleaning compositions, such as shampoos and shower gels, are common and beloved by many consumers. Such compositions typically have water as a major component and are usually sold in plastic bottles or tubes. The compositions are conventionally formulated to have a viscosity that is convenient for consumer usage habits and easy to dispense from the packaging in which they are sold.

[0003] It is generally well known that the world's oceans will soon have more plastic than marine life. Considering environmental concerns and the desire of consumers and conscious companies to do more for the planet, there is a strong desire to use less plastic in the sale of products, including consumer goods. In addition to reducing plastic, reducing the use of palm kernel oil is also desirable, as less use of palm kernel oil always results in a reduction in global deforestation.

[0004] There is increasing interest in developing a concentrate that is easy to pour and hydrates and produces a ready-to-use consumer product with desired properties such as viscosity. It is also desirable to produce a washing composition from the concentrate that is substantially free of at least one of sulfate, paraben, hydantoin, isothiazolone, dioxane and oil, and in particular does not highly rely on a structuring agent derived from palm kernel oil. Accordingly, the present invention relates to a concentrated composition comprising C 12 -C 20 -lactate, an anionic surfactant and an amphoteric surfactant, an amphoteric ion surfactant or both. The composition is hydratable, in a lamellar phase and thickens and transforms into an isotropic end-use washing composition upon dilution. An isotropic composition means that its properties are uniform in all directions. An isotropic composition is usually clear. The composition can be used as a concentrate and diluted as needed, or can be diluted with water in a refill pack to ensure reduction of plastic waste, while not highly relying on a structuring agent derived from palm kernel oil.

[0005] Additional Information

[0006] Efforts for preparing detergent compositions have been disclosed. In U.S. Patent Application Publication 2019 / 031258 A1, a rheofluidifying concentrated foaming composition is described.

[0007] Other efforts for preparing detergent compositions have even been disclosed. In U.S. Patent Application Publication 2018 / 098923 A1, a personal care composition substantially free of sulfated surfactants is described.

[0008] In U.S. Patent No. 6,737,394 B2, an aqueous isotropic liquid cleaning and moisturizing composition having a surfactant, a thickener, and organic gel particles is disclosed.

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

[0010] Other efforts for preparing detergent compositions have been disclosed. In WO 2019 / 000407 A1, a sulfate-free detergent composition having a cationic cyclopolymer is described.

[0011] None of the additional information describes the concentrates and detergent compositions as described and claimed herein. SUMMARY OF THE INVENTION

[0012] In a first aspect, the present invention relates to a hydratable layered concentrated surfactant composition having a viscosity of 20 to 11,000 mPa·s (cps), preferably 25 to 8,000 mPa·s (cps), and most preferably 200 to 3,750 mPa·s (cps) (or 250 to 3,500 mPa·s (cps) or 275 to 3,350 mPa·s (cps)), wherein when diluted with water at a weight ratio of the composition to water of 1:1 to 1:10, and preferably 1:1.8 to 1:7, and most preferably 1:2 to 1:6 (or 1:2.5 to 1:5 or 1:2.9 to 1:4.5 or 1:2.95 to 1:4.45), the composition thickens and the viscosity increases to produce an isotropic end-use composition having a viscosity of 1,000 to 20,000 mPa·s (cps), and preferably 2,000 to 15,000 mPa·s (cps), and most preferably 3,000 to 12,000 mPa·s (cps) (or 3,200 to 10,000 mPa·s (cps) or 3,450 to 9,250 mPa·s (cps)), and the hydratable concentrated surfactant composition contains C 12-C 20 a lactate and having a pH of from 5.75 to 7.75, preferably from 6.2 to 7.5, and most preferably from 6.25 to 7.35 (or from 6.3 to 7.3 or from 6.4 to 7.2).

[0013] In a second aspect, the present invention relates to a hydratable lamellar concentrated surfactant composition of the first aspect of the present invention, wherein the C 12 -C 20 lactate has from 40 to 100%, preferably from 50 to 95%, and most preferably from 60 to 90% (or from 65 to 85% or from 70 to 80%) of the C 14 -C 20 (or C 16 -C 20 or C 16 -C 18 ) groups (i.e., acyl moieties).

[0014] In a third aspect, the present invention relates to a hydratable concentrated lamellar surfactant composition having a viscosity of from 20 to 11,000 mPa·s (cps), preferably from 25 to 8,000 mPa·s (cps), and most preferably from 200 to 3,750 mPa·s (cps) (or from 250 to 3,500 mPa·s (cps) or from 275 to 3,350 mPa·s (cps)), wherein when diluted with water at a weight ratio of the composition to water of from 1:1 to 1:10, preferably from 1:1.8 to 1:7, and most preferably from 1:2 to 1:6 (or from 1:2.5 to 1:5 or from 1:2.9 to 1:4.5 or from 1:2.95 to 1:4.45), the composition thickens and the viscosity increases to produce an isotropic end-use washing composition having a viscosity of from 1,000 to 20,000 mPa·s (cps), preferably from 2,000 to 15,000 mPa·s (cps), and most preferably from 3,000 to 12,000 mPa·s (cps) (or from 3,200 to 10,000 mPa·s (cps) or from 3,450 to 9,250 mPa·s (cps)),

[0015] wherein the hydratable lamellar concentrated surfactant composition comprises:

[0016] a) an anionic surfactant substantially free of sulfates;

[0017] b) an amphoteric and / or zwitterionic surfactant,

[0018] c) C 12 -C 20 lactate, and

[0019] d) from 30 to 85% by weight of water,

[0020] The viscosity of the isotropic end-use composition is greater than the viscosity of the hydratable lamellar concentrated surfactant composition, and the pH of the concentrate and the end-use composition is from 6 to 7.75, preferably from 6.2 to 7.5, and most preferably from 6.25 to 7.35 (or from 6.3 to 7.3 or from 6.4 to 7.2).

[0021] In a fourth aspect, the present invention relates to an end-use composition prepared by diluting one of the hydratable lamellar concentrated surfactant compositions of the first two aspects of the present invention.

[0022] In a fifth aspect, the present invention relates to the use of the end-use compositions of the third and fourth aspects of the present invention for cosmetic treatment and washing of the skin or hair or washing of inanimate objects.

[0023] As used herein, "composition" without a qualifier means the hydratable composition and the end-use composition of the present invention. For the avoidance of doubt, and again, as used herein, a (lamellar) structuring agent is a component added to a composition (such as a washing composition) to help induce the surfactant to arrange into micellar plates or layers. Thus, they produce a translucent or opaque lamellar composition, such as a washing composition.

[0024] A structuring agent that is not highly dependent on palm kernel oil means less than 100% by weight, or less than 90% by weight, or less than 80% by weight, or less than 70% by weight, or less than 60% by weight, or from 3 to less than 60% by weight, or from 8 to 55% by weight, or from 10 to 45% by weight, or from 15 to 40% by weight, based on the total weight of the structuring agent, is derived from palm kernel oil. In another embodiment, not being highly dependent on palm kernel oil means that at least 5 to 100% by weight, or at least 10 to 70% by weight, or at least 45 to 80% by weight, or at least 60 to 75% by weight, or at least 60 to 100% by weight of the total weight of the structuring agent has C 14 -C 20 (or preferably C 16 -C 20 or most preferably C 16 -C 18) group (i.e., the acyl moiety is not derived from palm kernel oil). In yet another embodiment, none (0.0 wt%) of the total weight of the structuring agent is derived from palm kernel oil. In yet another embodiment, 60 to 100 wt% of the structuring agent used is not derived from palm kernel oil. As used herein, "hydratable" means adding water (i.e., diluting) to a layered concentrated composition containing water to produce a ready-to-use end-use composition. As used herein, "skin" means including the skin on the arms (including underarms), face, feet, neck, chest, hands, lower legs, buttocks, and scalp (including hair). A hydratable and layered concentrated surfactant composition ("hydratable composition") means a layered composition that increases in viscosity when water is added to the composition to produce an isotropic end-use composition suitable for topical application, where layered means that more than 85% of all micelles in the composition are arranged in plates or layers to produce a translucent or opaque hydratable composition. The hydratable composition is a composition suitable with a viscosity of 20 to 11,000 mPa·s (cps). Such an end-use composition is suitable for wiping or washing off, preferably with water. The end-use composition can be a household care cleaning composition, but is preferably a shampoo, lotion, facial cleanser, hand sanitizer, or personal care and liquid body wash. In one embodiment of the present invention, the end-use composition can have a viscosity of 1,000 to 20,000 mPa·s (cps) when it is a body wash or shampoo, and can have a viscosity of 1,800 to 7,000 mPa·s (cps) or 1,900 to 6,500 mPa·s (cps) or 2,000 to 6,000 mPa·s (cps) (or 2,200 to 5,575 mPa·s (cps)) when it is a hand sanitizer. The end-use composition may optionally contain a medical or therapeutic agent, but preferably, it is a cosmetic and non-therapeutic washing liquid for removing dirt, oil, etc. from surfaces including the skin and hair. In one embodiment of the present invention, the end-use composition is a household care composition, such as a glass, tabletop, 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 wash composition and is thus a liquid body wash. As described below, the end-use composition of the present invention may optionally contain skin-beneficial ingredients added thereto, such as emollients, vitamins and / or their derivatives, resorcinols, retinoic acid precursors, colorants, humectants, sunscreens, antibacterial agents, and mixtures thereof, etc. Skin-beneficial ingredients (or agents) can be water-soluble or oil-soluble. If used, the oil-soluble skin-beneficial agent generally accounts for 2.5 wt% of the hydratable composition, while the water-soluble skin-beneficial agent generally accounts for 15 wt% of the hydratable composition of the present invention when used. The hydratable composition and the end-use composition generally have a pH of 5.75 to 7.75.Unless otherwise stated, viscosity was measured using a Discovery HR-2 rheometer with a blasted plate having a 1000 micron gap at 4 - 15 s. -1 Shear rate was measured at 25 °C. An increase in viscosity means that the hydratable composition of the present invention has an initial viscosity lower than the final viscosity after adding water and preparing the resulting end-use composition. The end-use composition is prepared by combining and mixing water and the hydratable composition (with medium shear such as stirring, preferably by hand shaking) to produce an end-use composition having a higher viscosity than the hydratable concentrate from which it is prepared. In another embodiment, the hydratable composition can be applied directly to, for example, a consumer, and when water and shear are applied (e.g., shearing with the hand and water from a sink or shower), the desired end-use composition can be prepared. As used herein, when referring to sulfates, "substantially free" means less than 6.0% by weight of the end-use composition, preferably less than 3%, most preferably less than 2%, and even more preferably less than 1% (or less than 0.5%). In one embodiment of the present invention, "substantially free of sulfates" includes compositions that are free (0.0% by weight) of sulfates. Regarding non-sulfate-based components (i.e., components that are not anionic sulfate-containing surfactants, such as hydantoin), substantially free means less than 0.5% by weight of the end-use composition, preferably less than 0.3%, most preferably less than 0.2% (or less than 0.1% (or less than 0.05%)). Regarding non-sulfate-based components, substantially free also includes being free (0.0% by weight of the components in the end-use composition). Regarding all components from which the compositions of the present invention can be substantially free, the inclusion of 0.001 to 0.045% by weight of such components is within the scope of the present invention. In yet another preferred embodiment, the compositions of the present invention contain less than 35 ppm, preferably less than 25 ppm, and most preferably less than 15 ppm of dioxane or less than 2 ppm or less than 1 ppm of dioxane. In another embodiment, the composition contains 0.00001 to 0.00005% by weight of dioxane, such as 1,4-dioxane.

[0025] Regarding C 12 -C 20 lactates (i.e., used as structuring agents), which can be mono-lactyl or multi-lactyl or mixtures thereof, since lactic acid can, for example, undergo self-esterification. Thus, C 12 -C 20 lactates include lactic acid esters of fatty acids represented by the following formula:

[0026]

[0027] where R a is C 11 to C 19 hydrocarbon, each R bIndependently hydrogen or C 1-3 alkyl, u is an integer from 0 to 3, and Y + is a counterion that may include K + , Na + or NH4 + or a mixture thereof, whereby when the two R b groups are optionally hydrogen, the structuring agent represented is glycolic acid.

[0028] The term "comprising" is intended to cover the terms "consisting essentially of" and "consisting of". For the avoidance of doubt, and for illustration, the end-use compositions of the present invention comprising a surfactant, water and an active substance are intended to include compositions consisting essentially of and consisting of the same. All ranges defined herein are intended to include all sub-ranges subsumed therein. Except in the operating comparative examples, or where otherwise expressly indicated, all numbers expressing amounts or ratios or conditions and / or physical properties and / or uses of materials in this specification are to be understood as modified by the word "about". As found herein, the present disclosure is considered to cover all embodiments present in claims that are multiply dependent on one another, regardless of the fact that the claims may exist without multiple dependence or redundancy. Detailed Description

[0029] Regarding the anionic surfactant, it generally accounts for 0.05 to 30% by weight of the hydratable composition. In one embodiment of the present invention, the anionic surfactant accounts for 0.5 to 25% by weight of the hydratable composition, and preferably 0.8 to 20% by weight. In yet another embodiment, the anionic surfactant accounts for 12 to 18% by weight of the hydratable composition. In yet another embodiment, based on the total weight of the anionic surfactant, the anionic surfactant is 15 to 100% by weight, and preferably 30 to 85% by weight, and most preferably 35 to 80% by weight of acyl hydroxyethyl sulfonate. In yet another embodiment, acyl hydroxyethyl sulfonate is used together with another anionic surfactant, and the other anionic surfactant preferably includes acyl taurate (defined to include acyl C 1-4 alkyl taurate, preferably acyl methyl taurate), glutamate and / or glycinate. When using an anionic surfactant other than hydroxyethyl sulfonate, in a generally preferred embodiment, the other anionic surfactant is acyl methyl taurate, which generally may account for 40 to 85% by weight, and preferably 50 to 82% by weight, and most preferably 60 to 80% by weight of the total anionic surfactant weight in the hydratable composition.

[0030] Regarding the zwitterionic and / or amphoteric surfactants used in the hydratable composition, they generally account for 0.1 to 45% by weight of the hydratable composition, preferably 0.5 to 35% by weight, and most preferably 12 to 25% by weight.

[0031] For example, in order to contribute to the structuring and hydration of the hydratable composition, C 12 -C 20 lactate is used. In one embodiment of the present invention, this C 12 -C 20 lactate has 40 to 100%, and preferably 50 to 95%, and most preferably 60 to 90% (or 65 to 85% or 70 to 80%) of C 14 -C 20 (or C 16 -C 20 or C 16 -C 18 ) groups (i.e., acyl moieties). A structuring agent (or structuring reagent) such as a C6-C 14 acid and / or alcohol (i.e., derivatives of its acid) may optionally be included, and when used in the composition, it accounts for less than 25% by weight of the total structuring agent, preferably less than 20% by weight, and most preferably 0.01 to 12% by weight (or 0.01 to 7% by weight). Generally, the total structuring agent used accounts for 0.1 to 16% by weight of the hydratable composition, preferably 1.8 to 12% by weight, and most preferably 3 to 9% by weight (or 3.5 to 8% by weight or 4 to 7.2% by weight). The preferred lactate used as a structuring agent is C 14 -C 20 lactate, and more preferably C 16 -C 18 lactate, such as palmitoyl-1-lactate, stearoyl-1-lactate or a mixture thereof. Poly-lactyl groups (usually numbered from 2 to 3 lactyl groups) are also applicable, such as palmitoyl-2-lactate, stearoyl-2-lactate or a mixture thereof. In one embodiment of the present invention, palmitoyl-2-lactate, stearoyl-2-lactate or a mixture thereof is preferred. The fatty acid source is usually vegetable oil, soybean oil, coconut oil and palm oil, and in a preferred embodiment of the present invention, less than 60%, and preferably less than 45%, and most preferably less than 30% by weight of the structuring agent used is derived from palm kernel oil. In one embodiment of the present invention, 0.001 to 39% by weight, and preferably 0.01 to 35% by weight, and most preferably 1 to 26% by weight of the total structuring agent used in the composition is derived from palm kernel oil.

[0032] Another anionic surfactant suitable for optional use is the glycolate represented by formula (III) when the R b group is hydrogen.

[0033] In yet another embodiment, the structuring agent (including optional structuring agents) for the present invention may comprise from 1 to 20 wt%, or 1 to 15 wt%, or 2 to 11 wt% of carbon recovered from carbon capture (e.g., purple carbon), based on the total weight of carbon in the structuring agent.

[0034] Inorganic salts are optional but are generally desirable components for helping to thicken the composition. Typical salts such as NaCl, KCl, MgCl2, CaCl2, mixtures thereof, etc. may be used. Generally, the inorganic salts are present in the hydratable composition in an amount of from 0 to 15 wt%, preferably from 1 to 12 wt%, and most preferably from 0.75 to 4.5 wt%.

[0035] In the hydratable composition of the present invention, polymer viscosity aids are optional but are generally desired components. Preferred polymers are those generally classified as high molecular weight ethoxylated fatty acid esters. Illustrative examples include PEG 120 methyl glucose dioleate, PEG 18 glycerol oleate / cocoate, PEG 150 pentaerythritol tetrastearate, mixtures thereof, etc. The generally preferred polymer viscosity aid is PEG 150 pentaerythritol tetrastearate, which is sold by Croda under the name Versathix. When used, these aids are present in the hydratable composition in an amount of from 0.01 to 0.9 wt%, preferably from 0.15 to 0.7 wt%, and most preferably from 0.15 to 0.5 wt% (or from 0.1 to 0.4 wt% or from 0.12 to 0.3 wt%).

[0036] While sulfate-based surfactants may optionally be used, in another embodiment of the present invention, there is less than 3.0 wt%, and preferably less than 1.0 wt%, and most preferably no (0.0 wt%) sulfate-based surfactant present in the end-use composition of the present invention. In the present invention, the hydratable composition should be formulated such that upon dilution, the desired component / ingredient content (such as sulfate content) is achieved in the end-use composition.

[0037] Regarding the anionic surfactants suitable for use in the hydratable and end-use compositions of the present invention, the anionic surfactants used may include aliphatic sulfonates such as primary alkane (e.g., C8-C 22 ) sulfonates, primary alkane (e.g., C8-C 22 ) disulfonates, C8-C 22 olefin sulfonates, C8-C 22 hydroxyalkane sulfonates or alkyl glycerol ether sulfonates (AGS); or aromatic sulfonates such as alkylbenzene sulfonates. The anionic surfactant may also be an alkyl sulfate (e.g., C 12 -C 18alkyl sulfates) or alkyl ether sulfates (including alkyl glyceryl ether sulfates). Among them, the alkyl ether sulfates are those having the following formula:

[0038] RO(CH2CH2O) n SO3M

[0039] wherein R is an alkyl or alkenyl group having 8 to 18 carbon atoms, preferably 12 to 18 carbon atoms, n is at least 1.0, preferably less than 5, and most preferably an average value of 1 to 4, and M is a solubilizing cation such as sodium, potassium, ammonium or substituted ammonium.

[0040] The anionic surfactant may also include alkyl sulfosuccinates (including monoalkyl and dialkyl, such as C6-C 22 sulfosuccinates); alkyl and acyl taurates (usually and preferably methyl taurates), alkyl and acyl sarcosinates, sulfacetates, C8-C 22 alkyl phosphates and phosphonates, alkyl phosphates and alkoxyalkyl phosphates, acyl lactates, C8-C 22 monoalkyl succinates and maleates, sulfacetates, alkyl glucosides and acyl isethionates, etc.

[0041] The sulfosuccinate may be a monoalkyl sulfosuccinate having the following formula:

[0042] R 1 O2CCH2CH(SO3M)CO2M;

[0043] and the amide-MEA sulfosuccinate having the following formula:

[0044] R 1 CONHCH2CH2O2CCH2CH(SO3M)CO2M, where R 1 ranges from C8-C 22 alkyl.

[0045] Sarcosinates are usually represented by the following formula:

[0046] R 2 CON(CH3)CH2CO2M, where R 2 ranges from C8-C 20 alkyl.

[0047] Taurates are usually represented by the following formula:

[0048] R 3 CONR 4 CH2CH2SO3M

[0049] where R 3 is C8-C 20 alkyl, R 4is a C1-C4 alkyl group.

[0050] M is a solubilizing cation as described above.

[0051] The hydroxyethyl sulfonates that can be used include C8-C 18 acyl hydroxyethyl sulfonates (including those having substituted head groups such as C 1-4 alkyl substitution, preferably methyl substitution). These esters are prepared by the reaction between an alkali metal hydroxyethyl sulfonate and a mixed aliphatic fatty acid having 6 to 18 carbon atoms and an iodine value of less than 20. Generally, at least 75% of the mixed fatty acids have 12 to 18 carbon atoms, and at most 25% have 6 to 10 carbon atoms.

[0052] The acyl hydroxyethyl sulfonates used can be alkoxylated hydroxyethyl sulfonates, as described in U.S. Patent No. 5,393,466 to Ilardi et al. entitled "Fatty Acid Esters of Polyalkoxylated Isethonic Acid", issued on February 28, 1995; incorporated herein by reference. Such compounds have the following general formula:

[0053] R 5 C-(O)-O-C(X)H-C(Y)H-(OCH2-CH2) m -SO3M,

[0054] where R 5 is 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.

[0055] 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 hydroxyethyl sulfonate, sodium cocoyl hydroxyethyl sulfonate, sodium methyl lauroyl taurate, sodium methyl cocoyl taurate, or a mixture thereof. Such anionic surfactants are commercially available from commonly used suppliers. Sodium cocoyl hydroxyethyl sulfonate, sodium methyl lauroyl taurate, sodium lauroyl glycinate, sodium methyl lauroyl hydroxyethyl sulfonate, or a mixture thereof are preferred anionic surfactants suitable for use.

[0056] Other applicable anionic surfactants include alaninates, aspartates, and mixtures thereof. Optionally desired to use are sodium cocoyl alaninate, sodium cocoyl aspartate, or a mixture thereof.

[0057] The zwitterionic surfactants (which can be zwitterionic depending on the pH) suitable for use in the present invention include sodium acyl amphoacetate, sodium acyl amphopropionate, disodium acyl amphodiacetate, and disodium acyl amphodipropionate, where the acyl group (i.e., alkanoyl group) can contain C7-C 18 alkyl moiety. Illustrative examples of suitable zwitterionic surfactants include sodium lauroamphoacetate, sodium cocoamphoacetate, lauroamphoacetate, cocoamphoacetate, and mixtures thereof.

[0058] Regarding the zwitterionic surfactants that can be used in the present invention, such surfactants include at least one acidic group. Such acidic groups can be carboxylic acid or sulfonic acid groups. They generally include a quaternary nitrogen and can thus be quaternary amino acids. They generally should include an alkyl or alkenyl group having 7 to 18 carbon atoms and generally conform to the general structural formula:

[0059] R 6 -[-C(O)-NH(CH2) q -] r -N + -(R 7 -)(R 8 )A-B, where R 6 is an alkyl or alkenyl group having 7 to 18 carbon atoms; where R 7 and R 8 are each independently an alkyl, hydroxyalkyl, or carboxyalkyl group having 1 to 3 carbon atoms; q is 2 to 4; r is 0 to 1; A is an alkylene group having 1 to 3 carbon atoms optionally substituted with a hydroxy group, and B is -CO2- or -SO3-.

[0060] Suitable zwitterionic surfactants for use in the present invention and within the above general formula include simple betaines of the formula:

[0061] R 6 -N + -(R 7 )(R 8 )CH2CO2 -

[0062] and amido betaines of the formula:

[0063] R 6 -CONH(CH2) t -N + -(R 7 )(R 8 )CH2CO2 - , where t is 2 or 3.

[0064] In both formulas, R 6 、R 7 and R 8As previously defined, R 6 can in particular be a mixture of C 12 and C 14 alkyls derived from coconut oil, such that at least half, preferably at least three quarters of the groups R 6 have 10 to 14 carbon atoms. R 7 and R 8 are preferably methyl.

[0065] In another embodiment, the zwitterionic surfactant is a sulfobetaine of the following formula:

[0066] R 6 -N + -(R 7 )(R 8 )(CH2)3SO3 -

[0067] or

[0068] R 6 -CONH(CH2) u -N + -(R 7 )(R 8 )(CH2)3SO3 -

[0069] where u is 2 or 3, or variants of these where -(CH2)3SO3 - is replaced by -CH2C(OH)(H)CH2SO3 - In these formulas, R

[0070] 6 , R 7 and R 8 are as previously defined.

[0071] Illustrative examples of suitable zwitterionic surfactants include betaines such as coco dimethyl carboxymethyl betaine, cocoamidopropyl betaine and lauramidopropyl betaine. Further suitable zwitterionic surfactants include cocoamidopropyl sulfobetaine. Such surfactants are commercially available from suppliers such as Stepan Company, and the use of mixtures of the above surfactants is within the scope of the present invention. In a preferred embodiment, the zwitterionic surfactant used in the present invention is cocoamidopropyl betaine.

[0072] ​Nonionic surfactants can optionally be used in the hydratable compositions and end-use compositions of the present invention. When used, nonionic surfactants are typically used at levels as low as 0.5 wt%, 1 wt%, 1.5 wt% or 2 wt% of the end-use composition and as high as 6 wt%, 8 wt%, 10 wt% or 12 wt% of the end-use composition. Nonionic surfactants that can be used particularly include reaction products of compounds having a hydrophobic group and a reactive hydrogen atom (such as aliphatic alcohols, acids, amides or alkylphenols) with alkylene oxides (especially ethylene oxide alone or ethylene oxide and propylene oxide). Specific nonionic surfactant compounds are alkyl (C6-C 22 ) phenol ethylene oxide condensates, aliphatic (C8-C 18 ) straight-chain or branched primary or secondary alcohol condensates with ethylene oxide, and products prepared by condensation of reaction products of ethylene oxide with propylene oxide and ethylenediamine. Other nonionic surfactants include long-chain tertiary amine oxides, long-chain tertiary phosphine oxides, dialkyl sulfoxides, etc.

[0073] In one embodiment of the present invention, the optionally used nonionic surfactant may include fatty acid / alcohol ethoxylates having the following structures: a) HOCH2(CH2) s (CH2CH2O) v H or b) HOOC(CH2) c (CH2CH2O) d H; where s and v are each independently integers of up to 18; and c and d are each independently integers 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, where 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.

[0074] The nonionic surfactant may also include sugar amides, such as polysaccharide amides. Specifically, the surfactant may be one of the lactamide described in U.S. Patent No. 5,389,279, titled "Compositions Comprising Nonionic Glycolipid Surfactants" by Au et al., issued on February 14, 1995; which is incorporated herein by reference, or may be one of the sugar amides described in U.S. Patent No. 5,009,814, titled "Use of N-PolyHydroxyalkyl Fatty Acid Amides as Thickening Agents for Liquid Aqueous Surfactant Systems" by Kelkenberg, issued on April 23, 1991; which is incorporated herein by reference. In the generally desired embodiments, the nonionic surfactant used is coconut monoethanolamide (CMEA) and / or polysorbate 20, typically present in the end-use composition at 0.25 to 0.85 wt%.

[0075] In one embodiment of the present invention, a cationic surfactant may optionally be used in the hydratable compositions and end-use compositions of the present invention.

[0076] One class of optional cationic surfactants includes heterocyclic ammonium salts, such as cetyl or stearyl pyridinium chloride, alkylamide ethyl pyrrolinium methyl sulfate, and lapyrium chloride.

[0077] Tetraalkylammonium salts are another class of useful cationic surfactants suitable for optional use. Examples include cetyl or stearyl trimethyl ammonium chloride or bromide; hydrogenated palm or tallow trimethyl ammonium halide; behenyl trimethyl ammonium halide or methyl sulfate; decyl isononyl dimethyl ammonium halide; ditallow (or distearyl) dimethyl ammonium halide, and behenyl dimethyl ammonium chloride.

[0078] Other types of cationic surfactants that can be used include various ethoxylated quaternary amines and ester quaternary salts. Examples include ammonium PEG-5 stearyllactate (e.g., Genamin KSL manufactured by Clariant), ammonium PEG-2 cocoate chloride, ammonium PEG-15 hydrogenated tallowate chloride, ammonium PEG 15 stearate chloride, dipalmitoylethyl methyl ammonium chloride, dipalmitoylethyl methyl sulfate, and stearylamidopropyl dimethyl lactate amine.

[0079] Even other useful cationic surfactants suitable for optional use include quaternized hydrolyzates of silk protein, wheat protein, and keratin, and the use of mixtures of the above cationic surfactants is also within the scope of the present invention.

[0080] If used, the cationic surfactant is present in the hydratable composition in an amount of no more than 1.0 wt%. When present, they are typically present in the end-use composition in an amount of 0.01 to 0.7 wt%, and more typically 0.1 to 0.5 wt%.

[0081] In one embodiment of the present invention, the end-use composition of the present invention is substantially free of polymeric quaternary ammonium compounds (including their salts). In another embodiment, the end-use composition contains less than 0.1 wt% of polymeric quaternary ammonium compounds. In yet another embodiment, the end-use composition contains less than 0.01 wt% of polymeric quaternary ammonium compounds. In still another embodiment, the hydratable composition and the end-use composition are free of polymeric quaternary ammonium compounds (i.e., 0.0%).

[0082] Based on the total weight of the hydratable composition, water preferably accounts for 35 to 75 wt% of the hydratable composition, and most preferably 40 to 70 wt%.

[0083] Conventional palm kernel oil-derived structuring agents, such as capric acid, lauric acid, and / or myristic acid, can optionally be used in combination with the structuring agent of the present invention. However, in one embodiment of the present invention, less than 4 wt%, preferably less than 3 wt% or 0.01 wt% to 2 wt% or less than 1 wt% of the end-use composition contains such conventional palm kernel oil-derived structuring agents. In yet another embodiment, there is no (0.0%) palm kernel oil-derived structuring agent in the hydratable cleaning concentrate and the end-use composition.

[0084] The pH of the hydratable composition and the end-use composition is typically from 6 to 7.75, and preferably from 6.2 to 7.5, and most preferably from 6.25 to 7.35 (or 6.3 to 7.3 or 6.4 to 7.2). pH regulators suitable for adjusting / buffering the pH can be used. Such pH regulators include triethylamine, NaOH, KOH, H2SO4, HCl, C6H8O7 (i.e., citric acid), or mixtures thereof. The pH regulator is added in an amount to produce the desired final pH. The pH value can be evaluated using commercial instruments, such as a pH meter commercially available from Thermo Corporation.

[0085] Optional skin benefit agents suitable for use in the present invention are limited to the extent that they can be topically applied and are suitable for dissolving in the hydratable composition and the end-use composition at the desired pH.

[0086] Illustrative examples of beneficial agents suitable for inclusion in the aqueous portion of the composition are acids such as amino acids, such as arginine, valine or histidine. Additional water-soluble beneficial agents suitable for use include vitamin B2, niacinamide (vitamin B3), vitamin B6, vitamin C, mixtures thereof, etc. Water-soluble derivatives of these vitamins can also be used. For example, vitamin C derivatives such as ascorbyl tetraisopalmitate, magnesium ascorbyl phosphate and ascorbyl glucoside can be used alone or in combination with each other. Other water-soluble beneficial agents suitable for use include 4-ethylresorcinol, extracts such as sage, aloe vera, green tea, grape seed, thyme, chamomile, yarrow, cucumber, licorice, rosemary extract, or mixtures thereof. Water-soluble sunscreens such as ensulizole can also be used. When present, the total amount of optional water-soluble beneficial agents (including mixtures) in the present invention can range from 0.0 to 10 wt%, preferably 0.001 to 8 wt%, and most preferably 0.01 to 6 wt% based on the total weight of the end-use composition.

[0087] Optionally including oil-soluble (i.e., non-water-soluble) beneficial agents is also within the scope of the present invention. The end-use composition is substantially free of oil and preferably has less than 0.15 wt% oil, and most preferably is oil-free (0.0%), where the oil is not intended to include any oil from fragrances. Thus, the oil-soluble active substances or beneficial agents are dissolved in the surfactants used. The only limitation regarding such oil-soluble beneficial agents is that when topically applied, they are suitable for providing a beneficial effect.

[0088] Illustrative examples of types of oil-soluble beneficial agents that can 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-propanoic acid, homosalate, 3,3,5-trimethylcyclohexyl 2-hydroxybenzoate, 2-ethylhexyl 2-hydroxybenzoate or mixtures thereof.

[0089] Other optional oil-soluble beneficial agents suitable for use include resorcinols such as 4-hexylresorcinol, 4-phenethylresorcinol, 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 co-owned U.S. Published Patent Application No. 2016 / 0000669A1. Resorcinols such as phenolamidobenzoic acid (isobutyramidothiazolyl resorcinol) are also suitable.

[0090] Other suitable and even other oil-soluble active substances include ω-3 fatty acids, ω-6 fatty acids, clotrimazole, 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, etc.

[0091] 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 mixtures thereof are generally preferred.

[0092] Another suitable retinoic acid precursor is the hydroxyanisole retinoate commercially available under the name provided by Molecular Design International. It can be used in combination with the oil-soluble active substances described herein.

[0093] When the optional oil-soluble active substance is used in the composition of the present invention, it generally accounts for 0.0 to 1.5% by weight of the end-use composition, preferably 0.001 to 1.5% by weight, and most preferably 0.05 to 1.2% by weight. In yet another embodiment, the oil accounts for 0.1 to 0.5% by weight of the total weight of the end-use composition. A combination of amidomeprox and niacinamide, 4-hexylresorcinol, 4-ethylresorcinol, isopropylresorcinol, 12-hydroxystearic acid or a mixture thereof is generally preferred, wherein amidomeprox accounts for 10 to 96% by weight of the total weight of the combination, preferably 15 to 85% by weight, and most preferably 25 to 65% by weight.

[0094] Preservatives are desirably incorporated into 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 conventional preservatives for use include hydantoin derivatives and propionates. Particularly preferred preservatives are iodopropynyl butylcarbamate, phenoxyethanol (containing the common emollient 1,2-octanediol), hydroxyacetophenone, ethylhexylglycerin, hexylene glycol, imidazolidinyl urea, sodium dehydroacetate, and benzyl alcohol, and mixtures thereof. Other preservatives suitable for use include sodium dehydroacetate, chlorphenesin, and decylene glycol. The choice of preservative should take into account the use of the composition and possible incompatibilities between the preservative and other components in the emulsion. The preservative is preferably used in an amount in the range of 0.01% to 2.0% by weight of the total weight of the end-use composition (up to 7% by weight of the total hydratable composition). Also preferred is a preservative system having hydroxyacetophenone alone or in combination with other preservatives. Parabens, DMDM hydantoin, and / or isothiazolinones may be used but are not preferred as described above, and the compositions of the present invention are likewise preferably substantially free of parabens, DMDM hydantoin, and / or isothiazolinones.

[0095] Thickeners are optionally applicable to the compositions of the present invention. Particularly useful are polysaccharides. Examples include fibers, starches, natural / synthetic gums, and cellulosic products. Representative starches are chemically modified starches such as sodium starch propionate and starch aluminum octenyl succinate. Cassava starch is generally preferred, and maltodextrin is also preferred. Suitable gums include xanthan gum, sclerotium, pectin, karaya gum, gum arabic, agar, guar gum (including gum acacia), carrageenan, alginates, and combinations thereof. Suitable cellulosic products include hydroxypropyl cellulose, hydroxypropyl methyl cellulose, ethyl cellulose, sodium carboxymethyl cellulose (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, the source of the primary cell wall material is selected from parenchyma from fruits, roots, bulbs, tubers, seeds, leaves, and combinations thereof; more preferably selected from citrus fruits, tomato fruits, peach fruits, pumpkin fruits, kiwi fruits, apple fruits, mango fruits, beets, beet roots, turnips, parsnips, corn, oats, wheat, peas, and combinations thereof; and even more preferably selected from citrus fruits, tomato fruits, and combinations thereof. The most preferred source of the primary cell wall material is parenchyma from citrus fruits. Citrus fibers, such as those available from Those obtained by the company with AQ Plus can also be used as a source of cellulose microfibrils. 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), Volume 292, pages 5 - 31.

[0096] In addition to polymer viscosity aids, synthetic polymers are another class of effective thickeners that can be optionally used. This class includes cross-linked polyacrylates such as carbomers, polyacrylamides such as 305 and taurate copolymers such as EG and AVC, the copolymers being identified by the corresponding INCI nomenclature as sodium acrylate / sodium acryloyldimethyl taurate and acryloyldimethyl taurate / vinylpyrrolidone copolymers. Another preferred synthetic polymer suitable for thickening is an acrylate-based polymer commercially available from Seppic and sold under the name Simulgel INS100. Calcium carbonate, pyrogenic silica, and magnesium aluminum silicate can also be used.

[0097] When used, the amount of the optional thickener can range from 0.001 to 5% by weight of the composition. Maltodextrin, xanthan gum, and carboxymethyl cellulose are generally preferred optional thickeners. In one embodiment of the present invention, based on the total weight of the end-use composition, less than 0.4% by weight or less than 0.2% by weight of an acrylate-based thickener is used. In another embodiment, 0.001 to 0.1% of the weight of the end-use composition comprises an acrylate-based thickener. In yet another embodiment, no acrylate-based thickener is used (0.0% by weight of the end-use composition).

[0098] Fragrances, fixatives, chelating agents (such as EDTA), and exfoliants may optionally be included in the compositions of the present invention. Each of these substances may be in the range of about 0.03 to about 5 wt%, preferably 0.1 to 3 wt%, based on the total weight of the end-use composition. In the case of using an exfoliant, those selected should have a particle size small enough such that they do not interfere with the performance of any packaging used to dispense the compositions of the present invention. In another embodiment of the present invention, 0.01 to 1.35 wt% or 0.1 to 1.15 wt% or 0.2 to 0.95 wt% of a fragrance is used in the end-use composition. Conventional emulsifiers having an HLB greater than 8 may optionally be used. Illustrative examples include Tween 40, Tween 60, Tween 80, polysorbate 20, and mixtures thereof. Generally, the emulsifier for a water-continuous system is 0.3 to 2.5 wt% of the end-use composition.

[0099] Conventional humectants may optionally be used as additives in the present invention to assist in moisturizing the skin upon topical application of such emulsions. These are generally polyol-type materials. Typical polyols include glycerol (i.e., propanetriol or glycerin), propylene glycol, dipropylene glycol, polypropylene glycol (e.g., PPG-9), polyethylene glycol, sorbitol, hydroxypropyl sorbitol, hexylene glycol, 1,3-butanediol, isopentylene glycol, 1,2,6-hexanetriol, ethoxylated glycerol, propoxylated glycerol, and mixtures thereof. Most preferably, glycerol, propylene glycol, or mixtures thereof are used. The amount of humectant used may be in any range from 0.0 to 35 wt% of the total weight of the composition. Generally, the humectant is 0.0 to 20 wt%, and preferably 0.001 to 15 wt% (most preferably 2 to 12 wt%) of the total weight of the end-use composition.

[0100] Regarding the hydratable and layered concentrate composition, it generally contains 10 to 30% by weight, preferably 13 to 25% by weight, and most preferably 15 to 22% by weight (or 16 to 20% by weight) of zwitterionic (and / or amphoteric) surfactants based on the total weight of the concentrate. The anionic surfactant generally accounts for 7.5 to 21% by weight of the concentrate, preferably 8.5 to 20% by weight, and most preferably 9.5 to 18% by weight (or 10 to 16% by weight). In one embodiment of the present invention, the anionic surfactant contains both taurate and isethionate, and the weight ratio of taurate to isethionate is from 4.6:1 to 1:4.6, or 4.2:1 to 1:4.2 or 4.2:1 to 1:4.2. In another embodiment, the weight ratio of taurate to isethionate is from 3.65:1 to 3.35:1 or 3.3:1 to 3:1 or 2.95:1 to 2.35:1. In yet another embodiment, the weight ratio of the zwitterionic surfactant (and / or amphoteric surfactant) to the anionic surfactant is from 1:1.65 to 1.65:1 or 1:1.45 to 1.45:1 or 1:1.35 to 1.35:1. In even another embodiment, the weight ratio of the zwitterionic surfactant to the anionic surfactant is from 1.5:1 to 1.32:1, or 1.3:1 to 1.18:1, or 1.25:1 to 1.15:1.

[0101] Regarding the end - use composition of the present invention, it generally has 1 to 35% by weight, preferably 2 to 30% by weight, and most preferably 4 to 18% by weight of total surfactants based on the total weight of the end - use composition. In one embodiment of the present invention, the end - use composition contains 7 to 16% by weight (or 8 to 15% by weight or 9 to 14% by weight or 10 to 13% by weight) of total surfactants based on the total weight of the end - use composition.

[0102] The present invention relates to a hydratable concentrated surfactant composition which thickens and thus shows an increase in viscosity when mixed and diluted with water. In one embodiment of the present invention, when the weight percentage of the zwitterionic surfactant in the composition exceeds the weight percentage of the anionic surfactant by more than 3:1, the structurant should be present in more than 15% by weight of the total weight of the surfactants in the composition. Additionally, in another embodiment of the present invention, when the weight ratio of the zwitterionic surfactant to the anionic surfactant is less than 1.5, the structurant accounts for no more than 27% by weight of the total weight of the surfactants in the composition.

[0103] When preparing the hydratable composition of the present invention, the required ingredients can be mixed with conventional equipment under medium shear and ambient conditions at a temperature of 35°C to 80°C. Water is added to the hydratable composition to produce the end-use composition. Moderate shear in a container such as shaking (or stirring) produces the end-use composition in less than 5 minutes, preferably in less than 3 minutes, and most preferably in less than 2 minutes. In one embodiment of the present invention, the end-use composition is prepared in less than 1 minute, and even more preferably in less than 30 seconds.

[0104] The packaging for the composition is generally not restricted as long as the hydratable composition can be hydrated and the end-use composition can be prepared upon addition of water. In one embodiment of the present invention, the hydratable composition is sold in a sachet or cartridge associated with and inserted into a bottle or can. The bottle or can is one that is filled with water and allows the hydratable composition to be released therein to mix with the water. Generally, the bottle or can has a lid with a pump that opens the sachet or cartridge to release the hydratable composition into the water to prepare the end-use composition. Such a hydratable composition unexpectedly produces an end-use composition having the desired properties appreciated by consumers, such as a shower gel. This packaging allows for unlimited refilling to consistently reduce plastic waste in the environment and is preferably 50 to 100 weight % post-consumer resin.

[0105] The examples provided are for facilitating understanding of the present invention. They are not intended to limit the scope of the claims.

[0106] Examples

[0107] In each of the examples represented in the table provided, all compositions were prepared in a conventional manner and thus by mixing the ingredients under medium shear at a temperature of about 35°C to 75°C under ambient conditions. The end-use composition (i.e., the end-use / diluted washing composition) was made to optionally contain a fragrance and contain a preservative to dilute the hydratable composition in the indicated weight ratio (water: composition). For the avoidance of doubt, "concentrate viscosity" means the viscosity of the hydratable composition and "dilute viscosity" means the viscosity of the end-use washing composition prepared, both in centipoise (cps) and measured at 25°C as described. Versathix TM is a PEG-150 pentaerythritol tetrastearate provided by Croda, Inc. Water and the hydratable composition were combined in a container and stirred with gentle shaking. With respect to the hydratable composition of the present invention, within less than one (1) minute after dilution and stirring, the desired uniform and isotropic washing composition was unexpectedly obtained.

[0108] Example I

[0109] Table I

[0110] Ingredients (wt%) Sodium Hydroxide 0.9 Cocamidopropyl Betaine 18.7 Lauric Acid 6.0 Sodium Cocoyl Isethionate 3.6 Sodium Methyl Cocoyl Taurate 10.8 Glycerin 0.95 EDTA Tetrasodium 0.05 Phenoxyethanol 2.96 Versathix* 2.0 Water Balance

[0111] *Pentaerythrityl tetrastearate PEG 150

[0112] The hydratable and lamellar concentrated composition shown in Table I is prepared with a conventional lamellar structuring agent, lauric acid, and a hydrocarbon derived from palm kernel oil. The concentrated composition has a pH of 6.2, is pourable, and has a viscosity of about 4,200 mPa·s (cps) at 4 seconds (25 °C). When 3 parts of water are diluted with 1 part of the concentrate and moderately stirred for about 1 minute, the resulting composition is a homogeneous and stable isotropic washing composition having a viscosity of about 11,000 mPa·s (cps) at 4 seconds.

[0113] Examples II - VI

[0114] Table II

[0115]

[0116]

[0117] The hydratable and lamellar concentrated composition shown in Table II is prepared with a lamellar structuring agent according to the present invention, namely a lactate. The concentrated compositions in Examples II - VI have a pH of 6.2, are pourable and have the viscosities shown. When 3 parts of water are diluted with 1 part of the concentrate and moderately stirred for about 1 minute, the resulting compositions described in the examples are homogeneous and stable isotropic washing compositions having the viscosities shown at 4 seconds and 6 seconds (25 °C). The lactate used contains 60 to 100% by weight of a hydrocarbon not derived from palm kernel oil.

[0118] The resulting isotropic washing compositions are surprisingly stable, do not synerese and maintain viscosities comparable to those of compositions prepared with 100% conventional structuring agents that are dependent on and derived from palm kernel.

[0119] Furthermore, those skilled in the art unexpectedly conclude that the washing compositions prepared according to the present invention have sensory feel, rinse feel and foaming characteristics comparable to those of compositions prepared similar to Example I and with conventional structuring agents having hydrocarbons derived from palm kernel oil.

Claims

1. A method for preparing an isotropic detergent composition, the composition having a viscosity of 1,000 to 20,000 mPa·s (cps), preferably 2,000 to 15,000 mPa·s (cps), and most preferably 3,000 to 12,000 mPa·s (cps) or 3,200 to 10,000 mPa·s (cps) or 3,450 to 9,250 mPa·s (cps), the method comprising the steps of: a) Combining water with a hydratable layered concentrated surfactant composition in a weight ratio of composition to water of 1:1 to 1:10, preferably 1:1.8 to 1:7, and most preferably 1:2 to 1:6 or 1:2.5 to 1:5 or 1:2.9 to 1:4.5 or 1:2.95 to 1:4.45, wherein the concentrated surfactant composition has a viscosity of 20 to 11,000 mPa·s (cps), preferably 25 to 8,000 mPa·s (cps), and most preferably 200 to 3,750 mPa·s (cps) or 250 to 3,500 mPa·s (cps) or 275 to 3,350 mPa·s (cps); and wherein the hydratable concentrated surfactant composition comprises C 12 -C 20 lactate and has a pH of from 5.75 to 7.75, preferably from 6.2 to 7.5, and most preferably from 6.25 to 7.35 or from 6.3 to 7.3 or from 6.4 to 7.2 b) After combining with water, thickening the layered concentrated surfactant composition and increasing the viscosity of the resulting isotropic detergent composition, c) Recovering the isotropic detergent composition, wherein the viscosity is measured at 25 °C using a Discovery HR-2 rheometer with a sandblasted plate having a 1000-μm gap at a shear rate of 4 - 15 s -1 -1.

2. The method according to claim 1, wherein less than 100% by weight, or less than 90% by weight, or less than 80% by weight, or less than 70% by weight, or less than 60% by weight, or from 3 to less than 60% by weight, or from 8 to 55% by weight, or from 10 to 45% by weight, or from 15 to 40% by weight of the total weight of the structuring agent is said C 12 -C 20 The lactate is derived from palm kernel oil.

3. The method according to claim 1 or 2, wherein said C 12 -C 20 -lactate comprises an acyl group, wherein at least 5 to 100% by weight or at least 10 to 70% by weight or at least 45 to 80% by weight or at least 60 to 75% by weight or at least 60 to 100% by weight of the acyl group is not derived from palm kernel oil, and said acyl group is a C 14 -C 20 - group, or preferably a C 16 -C 20 - group, or most preferably a C 16 -C 18 - acyl group.

4. The method according to any one of the preceding claims, wherein said C 12 -C 20 -lactate does not contain acyl groups derived from palm kernel oil.

5. The method according to any one of the preceding claims, wherein the hydratable layered concentrated surfactant composition comprises: a) An anionic surfactant substantially free of sulfates; b) Amphoteric and / or zwitterionic surfactants; c)C 12 -C 20 lactate; and d) 30 to 85% by weight of water, wherein the pH of the isotropic end-use composition is 6 to 7.75, preferably 6.2 to 7.5, and most preferably 6.25 to 7.35 or 6.3 to 7.3 or 6.4 to 7.

2.

6. The method according to any one of the preceding claims, wherein the hydratable layered concentrated surfactant composition comprises less than 3% by weight or less than 1% by weight of an anionic surfactant having sulfates.

7. The method according to claim 5, wherein the anionic surfactant comprises acyl hydroxyethyl sulfonate.

8. The method according to claim 7, wherein there is an additional anionic surfactant, and it comprises taurate, glycinate, glutamate, aspartate, alaninate or a mixture thereof.

9. The method according to claim 5, wherein there is a zwitterionic surfactant, which is coco dimethyl carboxymethyl betaine, cocoamidopropyl betaine, lauramidopropyl betaine, cocoamidopropyl sulfobetaine or a mixture thereof.

10. The method according to any one of claims 1 to 9, wherein said C 12 -C 20 -lactate is lauroyl-1-lactate, palmitoyl-1-lactate, stearoyl-1-lactate or a mixture thereof.

11. The method according to any one of claims 1 to 10, wherein based on the total weight of carbon in the structuring agent, the C 12 -C 20 lactate contains 1 to 20% by weight of carbon from carbon capture.

12. The method according to any one of claims 1 to 11, wherein the layered concentrated surfactant composition further comprises niacinamide, 12-hydroxy stearic acid, 4-ethyl resorcinol, 4-hexyl resorcinol, papainamide, terpineol, thymol or a mixture thereof.

13. An isotropic end-use washing composition obtained by the method according to any one of the preceding claims, wherein the washing composition has a viscosity of from 1,000 to 20,000 mPa·s (cps), and a pH of from 6 to 7.75, and preferably from 6.2 to 7.5, and most preferably from 6.25 to 7.35, where the viscosity is measured at 25 °C using a Discovery HR-2 rheometer with a blasted plate having a 1000 micron gap at a shear rate of 4 - 15 s -1 -1. 14.C 12 -C 20 Use of lactate for constructing a layered composition, said C 12 -C 20 The lactate contains at least 5 to 100% by weight or at least 10 to 70% by weight or at least 45 to 80% by weight or at least 60 to 75% by weight or at least 60 to 100% by weight of C not derived from palm kernel oil 14 -C 20 Or preferably C 16 -C 20 Or most preferably C8-C 18 acyl group.

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