Cleaning compositions containing lamellar structured surfactant systems and their use

Abstract

The present invention discloses a cleaning composition containing a layered structured surfactant system and its application, and relates to the technical field of cleaning compositions. The present invention uses alkanoyl taurate or / and methyl alkanoyl taurate, and is used in combination with a certain proportion of fatty acids. In a water-based environment, a structured layered structure can be formed under neutral to acidic conditions, and on the basis of using a small amount of surfactant, a higher viscosity can be achieved at high and normal temperatures, with excellent viscosity stability, and no additional addition of structurants such as thickeners or a large amount of surfactants are required to achieve stability requirements at room temperature to high temperatures. The viscosity of the cleaning composition at 0.6s-1 at 25°C is ≥1000mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥0.3, and it is stable at least 2 weeks at 25°C and 50°C, and no visually observable separation occurs.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning compositions, and in particular relates to a cleaning composition containing a layered structured surfactant system and application thereof. Background Art

[0002] Daily personal care cleaning products often need to have a certain high viscosity (usually > 1000mPa.s), because only when the viscosity reaches a certain level will it not be too easy to flow and inconvenient to use. At the same time, higher viscosity will also make the product reflect texture and beauty, so that consumers will have a higher evaluation of product quality and concentration. In addition, high viscosity can make the product stable due to greater steric hindrance, without stratification, and has better stability.

[0003] The rheological properties (viscosity) of all surfactant solutions (including liquid cleaning solutions) are very dependent on their microstructure, i.e., the shape and concentration of micelles or other self-assembled structures in the solution. When there is enough surfactant to form micelles (concentration above the critical micelle concentration or CMC), spherical or cylindrical (rod-shaped) micelles can be formed. As the surfactant concentration increases, an ordered liquid crystal phase can be formed, such as a lamellar phase, a hexagonal phase, or a cubic phase. Among them, the lamellar phase is composed of alternating surfactant bilayers and water layers, and these layers are usually not flat but folded, thereby forming submicron spheres, onion-like structures, called bubbles or liposomes. The hexagonal phase is composed of long cylindrical micelles arranged in a hexagonal lattice. Typically, the microstructure of personal care products is composed of spherical micelles, rod-shaped micelles, or lamellar dispersions.

[0004] As mentioned above, micelles can be spherical or rod-shaped. Formulations with spherical micelles tend to have low viscosity and show Newtonian fluid shear properties, i.e., the viscosity is constant as a function of shear rate; therefore, if an easy pouring product is required, the solution is less viscous and, at the same time, does not have suspending ability. In these systems, viscosity increases linearly with surfactant concentration.

[0005] Rod-shaped micelle solutions are more viscous because the movement of longer micelles is restricted. At a critical shear rate, the micelles align and the solution becomes shear-thinning. Adding salt increases the size of its rod-shaped micelles and thus increases the zero shear viscosity (i.e., the viscosity when placed in a bottle), which helps to suspend particles but also increases the critical shear rate (the point at which the product becomes shear-thin, and a higher critical shear rate means that the product is more difficult to pour).

[0006] Lamellar dispersions differ from both spherical and rod-shaped micelles in that they have high zero-shear viscosity due to the close-packed arrangement of the constituent lamellar droplets, and are also very shear-thinning (easy to disperse when poured). That is, the solution can become more dilute than a rod-shaped micelle solution at moderate shear rates.

[0007] Thus, when formulating a liquid cleaning composition, one has the choice of using a rod-like micellar solution (which has a zero shear viscosity, e.g., suspending ability is not very good and / or does not shear thin very easily) or using a lamellar dispersion (which has a higher zero shear viscosity, e.g., better suspension, and is very shear thinning).

[0008] However, in order to form such lamellar compositions, certain trade-offs must be made. First, higher amounts of surfactant are required to form the lamellar phase, but this often requires the addition of co-surfactants and / or salts, which are neither ideal nor desirable. Second, additional thickeners are added to increase viscosity, but this can result in a loss in performance or cost.

[0009] In short, lamellar compositions are often more desirable, especially in terms of suspending emollients and providing aesthetics to the consumer, but they generally require more surfactant, are more expensive, and have limitations on the surfactants that can be used.

[0010] At the same time, as the temperature changes, the micelle morphology of the surfactant will change. The layered structure that can be maintained at low and normal temperatures is usually transformed into rod-shaped or spherical micelles at higher temperatures, causing a sharp drop in apparent viscosity. For unstable liquid detergents, it exhibits a very thick consistency at low temperatures, but a very thin consistency at elevated temperatures. At low temperatures, the liquid composition becomes a semi-solid gel that is difficult to use. At elevated temperatures, the liquid composition becomes a thin liquid like water, which causes phase separation and instability of the product.

[0011] The applicant's prior patent CN116098821A describes that by controlling the mass ratio of alkanoyl taurate and methyl alkanoyl taurate, the shortcomings of the two raw materials are overcome and their respective advantages are brought into play, so that the obtained cleaning products are easier to thicken, have high transparency and good stability. However, in order to achieve the ideal viscosity, an additional thickener needs to be added in this solution (for example, PEG-150 stearate is used in the embodiment). Although the thickening (viscosity) problem at room temperature is solved, there is still the problem that the viscosity drops rapidly as the temperature rises, and the high-temperature stability of the product is poor. This patent does not conduct further research on the stability (viscosity) at high temperature.

[0012] Based on this, the present invention further optimizes the high temperature stability of the cleaning composition, and unexpectedly finds that the use of taurine surfactant and fatty acid in combination can induce the formation of a lamellar phase. On the basis of using a small amount of surfactant, a composition can be obtained that has an ideal viscosity not only at room temperature but also at a higher temperature. Summary of the invention

[0013] The present invention aims at the problems existing in the prior art and provides a cleaning composition containing a layered structured surfactant system and its application. The present invention uses alkanoyl taurate or / and methyl alkanoyl taurate and a certain proportion of fatty acids in combination. In a water-based environment, on the basis of using a small amount of surfactant, a structured layered structure can be formed under neutral to acidic conditions, and a high viscosity can be achieved at both high and normal temperatures, with excellent viscosity stability. No additional thickener or other structuring agent is required or a large amount of surfactant is required, and stability requirements at room temperature to high temperature can be achieved. The present invention is both economical and environmentally friendly, and the performance of the cleaning composition will not be degraded.

[0014] To achieve the above objectives, in a first aspect, the present invention provides a cleaning composition containing a layered structured surfactant system, comprising the following raw materials:

[0015] A) a taurate surfactant; the taurate surfactant is selected from alkanoyl taurate and / or methyl alkanoyl taurate;

[0016] The alkanoyl taurate includes at least one of sodium lauroyl taurate, sodium myristoyl taurate, and sodium cocoyl taurate; the methyl alkanoyl taurate includes at least one of sodium methyl lauroyl taurate, sodium methyl myristoyl taurate, and sodium methyl cocoyl taurate;

[0017] B) fatty acid; the fatty acid is a saturated or unsaturated fatty acid of C8-C20;

[0018] C) Water.

[0019] In a preferred embodiment, the total amount of the taurate surfactant is 1-15 wt %, preferably 3-15 wt %, more preferably 3-10 wt %.

[0020] In a preferred embodiment, the fatty acid includes at least one of oleic acid, coconut acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid.

[0021] In a preferred embodiment, the fatty acid is used in an amount of 0.5-20 wt %, more preferably 0.5-15 wt %, most preferably 0.5-10 wt %.

[0022] In a preferred embodiment, the viscosity of the cleaning composition at 0.6 s-1 at 25°C is ≥ 1000 mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥ 0.3.

[0023] In a preferred embodiment, the cleaning composition is stable at 25°C and 50°C for at least 2 weeks without visually observable separation.

[0024] In a preferred embodiment, the cleaning composition further comprises an acid-base regulator, and the acid-base regulator comprises at least one of citric acid, lactic acid, salicylic acid, glycolic acid, fruit acid, hydrochloric acid, and phosphoric acid, preferably citric acid or salicylic acid.

[0025] In a preferred embodiment, the acid-base regulator is used in an amount of 0.01-5% by weight.

[0026] In a preferred embodiment, the cleaning composition has a pH of 2.5-5.9, preferably 3.0-5.0, more preferably 3.5-5.0.

[0027] In a preferred embodiment, the cleaning composition further comprises a surfactant B other than the taurate surfactant A, and the amount of the surfactant B is 0-15 wt %; the surfactant B is selected from one or more of anionic surfactants, cationic surfactants, nonionic surfactants and zwitterionic surfactants.

[0028] In a second aspect, the present invention provides the use of the cleaning composition containing the lamellar structured surfactant system in a personal care detergent.

[0029] In a preferred embodiment, the personal care detergent also includes a hydrophobic skin or hair benefit agent in an amount of 0 to 30% by weight, preferably 0.1 to 10% by weight, and more preferably 0.1 to 5% by weight; the hydrophobic skin or hair benefit agent includes at least one of silicone oil, grease, wax, hydrophobic plant extract, hydrocarbon, higher alcohol, ester, and essential oil.

[0030] In a preferred embodiment, the personal care detergent also includes a water-soluble skin or hair benefit agent in an amount of 0 to 50% by weight, preferably 3 to 30% by weight; the water-soluble skin or hair benefit agent includes at least one of allantoin, urea, pyrrolidone carboxylic acid, pyrrolidone carboxylate, hyaluronic acid, hyaluronic acid salt, sorbic acid, sorbate, amino acid, polyol, and sugar.

[0031] In a preferred embodiment, the personal care detergent further includes additives, and the additives are selected from one or more of preservatives, chelating agents, antimicrobial agents, fillers, penetrants, sunscreens, fragrances, dispersants, and film-forming agents; the additives are all conventional components in the art and are not limited here.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention uses alkanoyl taurate and / or methyl alkanoyl taurate in combination with a certain proportion of fatty acids. In a water-based environment, it can form a structured layered structure under neutral to acidic conditions, can achieve a high viscosity at both high and normal temperatures, and has excellent viscosity stability. It does not require the addition of additional structuring agents such as thickeners or the use of a large amount of surfactants to achieve stability requirements at room temperature to high temperatures. It is both economical and environmentally friendly, and will not deteriorate the performance of the cleaning composition.

[0034] 2. The cleaning composition of the present invention containing a lamellar structured surfactant system has a viscosity at 25°C of ≥1000 mPa.s at 0.6s-1, and a ratio of the viscosity at 50°C to the viscosity at 25°C of ≥0.3, and is stable at 25°C and 50°C for at least 2 weeks without visually observable separation.

[0035] 3. The cleaning composition containing the layered structured surfactant system of the present invention does not need to use a large amount of surfactants, which can effectively save costs and avoid the degradation of performance caused by a large amount of surfactants. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with examples, but these examples do not constitute any limitation to the present invention.

[0037] Surfactant B

[0038] In a preferred embodiment, the cleaning composition further comprises a surfactant B other than the taurate surfactant A, and the amount of the surfactant B is 0-15 wt %; the surfactant B is selected from one or more of anionic surfactants, cationic surfactants, nonionic surfactants and zwitterionic surfactants.

[0039] Anionic surfactants can be any anionic surfactants known or previously used in the field of aqueous surfactant compositions. Suitable anionic surfactants include, but are not limited to, alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, alkyl aryl sulfonates, α-olefin sulfonates, alkylamide sulfonates, alkyl aryl polyether sulfates, alkyl amido ether sulfates, alkyl monoglyceryl ether sulfates, alkyl monoglyceride sulfates, alkyl monoglyceride sulfonates, alkyl succinates, alkyl sulfosuccinates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkyl amido sulfosuccinates, alkyl thioacetates, alkyl phosphates, alkyl ether phosphates, alkyl ether carboxylates, alkyl amido ether carboxylates, N-alkyl amino acids, N-acyl amino acids, alkyl peptides, alkyl hydroxypropyl sulfonates, alkyl isethionates, carboxylates. The cations of the salts in the aforementioned anionic surfactants are selected from the salts of sodium, potassium, magnesium, ammonium, ethanolamine, diethanolamine, triethanolamine, isopropylamine, diisopropylamine and triisopropylamine. The alkyl and acyl groups of the aforementioned surfactants contain 6-24 carbon atoms, preferably 8-22 carbon atoms, more preferably 12-18 carbon atoms, and may be unsaturated; the aryl group in the surfactant is selected from phenyl or benzyl. The ether-containing surfactant contains 1-10 ethylene oxide and / or propylene oxide, more preferably 1-3 ethylene oxide.

[0040] Examples of suitable anionic surfactants include: lauryl alcohol polyethoxylate sulfate, tridecyl alcohol polyeth sulfate, myristyl alcohol polyeth sulfate, C 12 -C 13 Palm alcohol polyether sulfate, C 12 -C 14 Palm alcohol polyether sulfate, and C 12 -C 15 Sodium, potassium, lithium, magnesium, and ammonium salts of palmityl polyether sulfate, the above anionic surfactants can be modified by 1-3 moles of ethylene oxide to achieve ethoxylation; and sodium, potassium, lithium, magnesium, ammonium and triethanolamine salts of lauryl sulfate, coconut sulfate, tridecyl sulfate, myristyl sulfate, cetyl sulfate, cetearyl sulfate, stearyl sulfate, oleyl sulfate, tallow sulfate; and disodium lauryl sulfosuccinate, disodium lauryl polyethoxy ether sulfosuccinate, sodium cocoyl isethionate, C 12 -C 14 Sodium olefin sulfonate, sodium laureth-6 carboxylate, sodium cocoyl glycerate, sodium myristyl sarcosine, sodium dodecylbenzene sulfonate, sodium cocoyl sarcosinate, sodium cocoyl glutamate, potassium myristoyl glutamate, triethanolamine monolauryl phosphate and fatty acid soap, wherein the fatty acid soap is a sodium, potassium, ammonium or triethanolamine salt of a saturated or unsaturated fatty acid having 8 to 22 carbon atoms.

[0041] The cationic surfactant can be any cationic surfactant known or previously used in the field of aqueous surfactant compositions. Suitable classes of cationic surfactants include, but are not limited to, polyquaternium salts, alkylamines, alkylimidazolines. In addition, alkylamine oxides can function as cationic surfactants at low pH.

[0042] Exemplary polyquaternium salts include at least one of polyquaternium-10, polyquaternium-7, polyquaternium-6, and polyquaternium-67.

[0043] The alkylamine surfactants can be primary, secondary and tertiary substituted or unsubstituted fatty C 12 -C 22 Salts of alkylamines, and materials sometimes referred to as "amidoamines." Non-limiting examples of alkylamines and their salts include dimethyl cocoamine, dimethyl palmitylamine, dioctylamine, dimethyl stearylamine, dimethyl soyamine, soyamine, myristylamine, tridecylamine, ethyl stearylamine, N-tallowpropanediamine, ethoxylated stearylamine, dihydroxyethyl stearylamine, arachidylbehenamine, dimethyl laurylamine, stearylamine hydrochloride, soyamine chloride, stearylamine formate, N-tallowpropanediamine dichloride, and aminodimethicone (the INCI name for silicone polymers terminated with amino functional groups, such as aminoethylaminopropylsiloxane).

[0044] Non-limiting examples of amidoamines and their salts include stearamidopropyl dimethylamine, stearamidopropyl dimethylamine citrate, palmitamidopropyl diethylamine, and cocoamidopropyl dimethylamine lactate.

[0045] Non-limiting examples of alkyl imidazoline surfactants include alkyl hydroxyethyl imidazolines, such as stearyl hydroxyethyl imidazoline, coconut oil hydroxyethyl imidazoline, ethyl hydroxymethyl oleyl imidazoline, and the like.

[0046] Non-limiting examples of ethoxylated amines include PEG-cocopolyamine, PEG-15 tallowamine, quaternium-52, and the like.

[0047] Among the quaternary ammonium compounds that can be used as cationic surfactants, some correspond to the general formula: (R 5 R 6 R 7 R 8 N + )E - , where R 5 , R 6 , R 7 , and R 8 E is independently selected from aliphatic groups having 1 to 22 carbon atoms, aromatic groups, alkoxy groups, polyoxyalkylene groups, alkylamido groups, hydroxyalkyl groups, aryl groups or alkylaryl groups; -It is a salt that forms an anion, selected from halogen (e.g. chloride, bromide), acetate, citrate, lactate, glycerate, phosphate, nitrate, sulfate or alkyl sulfate. Aliphatic groups may contain ether bonds, ester bonds, amino groups, etc. in addition to carbon and hydrogen atoms. Long-chain aliphatic groups, especially aliphatic groups with more than 12 carbon atoms, may be saturated or unsaturated. Aryl groups are selected from phenyl and benzyl.

[0048] Exemplary quaternary ammonium surfactants include, but are not limited to, cetyltrimethylammonium chloride, cetylpyridinium chloride, dicetyldimethylammonium chloride, dihexadecyldimethylammonium chloride, stearyldimethylbenzylammonium chloride, dioctadecyldimethylammonium chloride, diicosyldimethylammonium chloride, dibehenyldimethylammonium chloride, dihexadecyldimethylammonium chloride, dihexadecyldimethylammonium acetate, behentrimethylammonium chloride, benzalkonium chloride, benzethonium chloride, di(coconut alkyl)dimethylammonium chloride, ditallowdimethylammonium chloride, di(hydrogenated tallow)dimethylammonium chloride, di(hydrogenated tallow)dimethylammonium acetate, ditallowdimethylammonium methylsulfate, ditallowdipropylammonium phosphate, and ditallowdimethylammonium nitrate.

[0049] At low pH, alkylamine oxides can be protonated and have properties similar to N-alkylamines. Examples include, but are not limited to, dimethyl-dodecylamine oxide, oleyl di(2-hydroxyethyl)amine oxide, dimethyltetradecylamine oxide, di(2-hydroxyethyl)-tetradecylamine oxide, dimethylhexadecylamine oxide, behenamine oxide, coconut amine oxide, decyltetradecylamine oxide, dihydroxyethyl C12-15 alkoxypropylamine oxide, dihydroxyethyl coconut amine oxide, dihydroxyethyl laurylamine oxide, dihydroxyethyl stearylamine oxide, dihydroxyethyl tallowamine oxide, hydrogenated palm kernel amine oxide, hydrogenated tallowamine oxide, hydroxyethyl hydroxypropyl C 12 -C 15 Alkoxypropylamine oxide, lauramine oxide, myristylamine oxide, cetylamine oxide, oleamidopropylamine oxide, oleylamine oxide, palmitylamine oxide, PEG-3 lauramine oxide, dimethyl lauramine oxide, potassium triphosphorylmethylamine oxide, soyaamidopropylamine oxide, cocoamidopropylamine oxide, stearylamine oxide, tallowamine oxide and mixtures thereof.

[0050] Amphoteric or zwitterionic surfactants are molecules containing acidic and basic moieties and having the ability to act as either an acid or a base. Suitable surfactants may be any amphoteric surfactant known or previously used in the field of aqueous surfactant compositions. Exemplary amphoteric surfactant classes include, but are not limited to, amino acids (e.g., N-alkyl amino acids and N-acyl amino acids), betaines, sulfobetaines, and alkyl amphocarboxylates.

[0051] Amino acid-based surfactants suitable for use in the present invention include surfactants represented by formula (1):

[0052]

[0053] Among them, R 10 is selected from a saturated or unsaturated hydrocarbon group having 10 to 22 carbon atoms or an acyl group containing a saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms, Y is hydrogen or methyl, and Z is selected from hydrogen, -CH3, -CH(CH3)2, -CH2CH(CH3)2, -CH(CH3)CH2CH3, -CH2C6H5, -CH2C6H4OH, -CH2OH, -CH(OH)CH3, -(CH2)4NH2, -(CH2)3NHC(NH)NH2, -CH2C(O)O - M + 、-(CH2)2C(O)O - M + M is a salt that forms a cation. Preferably, R 10 Selected from linear or branched C 10 -C 22 Alkyl, linear or branched C 10 -C 22 Alkenyl, R 11 C(O)- represents an acyl group; R 11 Selected from linear or branched C9-C 22 Alkyl, linear or branched C9-C 22 Alkenyl; M + Selected from sodium, potassium, ammonium and triethanolamine (TEA).

[0054] Amino acid surfactants can be obtained from the alkylation and acylation of α-amino acids, the α-amino acids being selected from alanine, arginine, aspartic acid, glutamic acid, glycine, isoleucine, leucine, lysine, phenylalanine, serine, tyrosine and valine. Representative n-acyl amino acid surfactants include, but are not limited to: mono- and dicarboxylates (e.g., sodium, potassium, ammonium and TEA) of N-acryloyl glutamic acid, for example, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium myristoyl glutamate, sodium palmitoyl glutamate, sodium stearoyl glutamate, disodium cocoyl glutamate, disodium stearoyl glutamate, potassium cocoyl glutamate, potassium lauroyl glutamate and potassium myristoyl glutamate; carboxylates (e.g., sodium, The invention also provides surfactants such as sodium, potassium, ammonium and TEA (for example, sodium cocoyl alaninate and TEA lauroyl alaninate); carboxylates of N-acryloyl glycine (for example, sodium, potassium, ammonium and TEA), for example, sodium cocoyl glycerate and potassium cocoyl glycerate; N-acryloyl carboxylates of sarcosine (for example, sodium, potassium, ammonium and TEA), for example, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium myristoyl sarcosinate, sodium oleoyl sarcosinate and ammonium lauroyl sarcosinate; and mixtures of the foregoing surfactants.

[0055] Betaine and sulfobetaine that can be used in the present invention are selected from: alkyl betaine represented by formula (2), alkyl amino betaine represented by formula (3) and alkyl amido betaine represented by formula (4), and the corresponding sulfobetaine (sulfobetaine):

[0056]

[0057]

[0058] Where R 12 It is C7-C 22 Alkyl or alkenyl, each R 13 are independently C1-C4 alkyl, R 14 is a C1-C5 alkylene group or a hydroxy-substituted C1-C5 alkylene group, n is an integer of 2-6, A is a carboxylic acid group or a sulfonic acid group, and M is a salt that forms a cation. Preferably, R 12 It is C 11 -C 18 Alkyl or C 11 -C 18 Alkenyl; R 13 is methyl; R 14 is selected from methylene, ethylene or hydroxypropylene; n is 3; and M is selected from sodium, potassium, magnesium, ammonium and mono-, di- and triethanolamine cations.

[0059] Examples of suitable betaines include, but are not limited to, lauryl betaine, coco betaine, oleyl betaine, coco hexadecyl dimethyl betaine, lauryl amidopropyl betaine, cocoamidopropyl betaine, and cocoamidopropyl hydroxysultaine.

[0060] Alkyl amphocarboxylates such as alkyl amphoacetates and alkyl amphopropionates (mono- and di-substituted carboxylates) can be represented by formula (5):

[0061]

[0062] Among them, R 15 It is -CH2C(O)O - M + 、-CH2CH2C(O)O - M + or -CH2CH(OH)CH2SO3 - M + , R 16 is hydrogen or -CH2C(O)O - M + , R 17 It is C7-C 22 Alkyl or alkenyl, M is a cation selected from sodium, potassium, magnesium, ammonium and mono-, di- and triethanolamine.

[0063] Exemplary alkyl amphocarboxylates include, but are not limited to, sodium cocoamphoacetate, sodium lauroamphoacetate, sodium caprylamphoacetate, disodium cocoamphoacetate, disodium lauroamphodiacetate, disodium caprylamphodiacetate, disodium caprylamphodiacetate, disodium cocoamphodipropionate, disodium lauroamphodipropionate, disodium caprylamphodipropionate, and disodium caprylamphodipropionate.

[0064] The nonionic surfactant can be any nonionic surfactant known or previously used in the field of aqueous surfactant compositions. Suitable nonionic surfactants include, but are not limited to, aliphatic (C6-C 18) primary or secondary straight or branched chain acids, alcohols or phenols; alkyl ethoxylates; alkylphenol alkoxylates (especially ethoxylates and mixed ethoxy / propoxy moieties); block oxyalkylene condensates of alkylphenols; oxyalkylene condensates of alkanols; and ethylene oxide / propylene oxide block copolymers. Other suitable nonionic surfactants include mono- or di-alkyl alkanolamides; alkyl polyglucosides (APGs); sorbitan fatty acid esters; polyoxyethylene sorbitan fatty acid esters; polyoxyethylene sorbitan esters; polyoxyethylene acids, and polyoxyethylene ethanols. Other examples of suitable nonionic surfactants include coco mono- or diethanolamide, coco glucoside, decyl diglucoside, lauryl diglucoside, coco diglucoside, polysorbate 20, polysorbate 40, polysorbate 60, polysorbate 80, glyceryl stearate, PEG-100 stearate, laureth 7, oleth 20, as well as ethoxylated linear alcohols, cetearyl alcohol, lanolin alcohol, stearic acid.

[0065] In a preferred embodiment, nonionic surfactants include, but are not limited to, alkoxylated methyl glucosides, such as methyl gluceth-10, methyl gluceth-20, PPG-10 methyl glucosides, and PPG-20 methyl glucosides; hydrophobically modified alkoxylated methyl glucosides, such as PEG 120 methyl glucose glycol ester, PEG-120 methyl glucose trioleate, and PEG-20 methyl glucose sesquistearyl ester are also suitable. Other exemplary hydrophobically modified alkoxylated methyl glucosides are disclosed in U.S. Pat. Nos. 6,573,375 and 6,727,357, the disclosures of which are hereby incorporated by reference in their entirety.

[0066] Other surfactants that can be used in the present invention are given in detail in WO99 / 21530, U.S. Pat. No. 3,929,678, U.S. Pat. No. 4,565,647, U.S. Pat. No. 5,720,964 and U.S. Pat. No. 5,858,948. In addition, suitable surfactants are also described in McCutcheon's Emulsifiers and Detergents (North American and International Editions, by Schwartz, Perry and Berch), all of which are incorporated by reference.

[0067] Hydrophobic skin or hair benefit agents

[0068] In a preferred embodiment, the cleaning composition further comprises a hydrophobic skin or hair benefit agent in an amount of 0 to 30 wt %, preferably 0.1 to 10 wt %, more preferably 0.1 to 5 wt %.

[0069] Hydrophobic skin or hair benefit agents include, but are not limited to:

[0070] (a) Silicone oils and modifications thereof, such as linear and cyclic polydimethylsiloxanes; amino silicone oils, alkyl silicone oils, alkylaryl silicone oils and aryl silicone oils;

[0071] (b) oils and fats, including natural oils and fats (triglycerides), such as jojoba oil, soybean oil, sunflower oil, rice bran oil, avocado oil, almond oil, olive oil, sesame oil, almond oil, castor oil, coconut oil, mink oil; cocoa butter; tallow, lard; hardened oils obtained by hydrogenating the above oils; and synthetic mono-, di- and triglycerides such as myristic acid glyceryl and 2-ethylhexanoic acid glyceryl;

[0072] (c) waxes, such as carnauba wax, spermaceti, beeswax, lanolin, and their derivatives;

[0073] (d) hydrophobic plant extracts;

[0074] (e) hydrocarbons, for example petrolatum, polybutene, liquid paraffin, microcrystalline wax, ozokerite, squalene, pristan and mineral oil;

[0075] (f) higher alcohols, such as lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, behenyl alcohol, cholesterol and 2-hexyldecanol;

[0076] (g) Esters such as cetyl octanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, glyceryl monostearate, glyceryl distearate, glyceryl tristearate, alkyl lactates, alkyl citrates and alkyl tartarates;

[0077] (h) essential oils and extracts thereof, for example, mint oil, jasmine oil, camphor oil, white fir oil, bitter orange peel oil, ryu, turpentine oil, cinnamon oil, bergamot oil, mandarin oil, calamus oil, pine oil, lavender oil, bay, clove oil, hiba, eucalyptus oil, lemon oil, borage oil, thyme oil, peppermint oil, rose oil, sage oil, sesame oil, ginger oil, basil oil, juniper oil, citronella oil, rosemary oil, mahogany oil, avocado oil, grape oil, grape seed oil, myrrh oil, cucumber oil, watercress oil, calendula oil, elderflower oil, geranium oil, linden flower oil, amaranth oil, algae oil, ginkgo oil, ginseng oil, carrot oil, guarana oil, tea tree oil, jojoba oil, comfrey oil, oat oil, cocoa butter, neroli oil, vanilla oil, green tea oil, pennyroyal oil, royal, aloe oil, menthol oil, eucalyptus oil, eugenol oil, citral oil, citronelle oil, borneol oil, linalool oil, geraniol oil, evening primrose oil, camphor oil, thymol oil, spirantol, penene, limonene oil and terpenoid oils;

[0078] (i) Mixtures of any of the above components, etc.

[0079] Water-soluble skin or hair benefit agents

[0080] In a preferred embodiment, the cleaning composition further comprises a water-soluble skin or hair benefit agent in an amount of 0 to 50% by weight, preferably 3 to 30% by weight.

[0081] Water-soluble skin or hair benefit agents include, but are not limited to, allantoin, urea, pyrrolidone carboxylic acid and its salts, hyaluronic acid and its salts, sorbic acid and its salts, amino acids (eg, lysine, arginine, cystine, guanidine), polyols, sugars.

[0082] In a preferred embodiment, the cleaning composition further comprises an additive selected from at least one of a preservative, a chelating agent, an antimicrobial agent, a filler (such as clay, talc), a penetrant, a sunscreen, a fragrance, a dispersant, and a film-forming agent.

[0083] Although the above mentioned optional components are given as examples, other optional components compatible with cosmetic applications known in the art may be used.

[0084] The following sources of raw materials are provided for illustrative purposes:

[0085] Purchase methods and models of reagents used in the examples

[0086]

[0087] Test Case

[0088] Viscosity at 25°C and 50°C: Brookfield DV-II+Pro viscometer, shear rate 0.6s -1 ; When the cleaning composition is stable at 25°C for at least 2 weeks without visually observable separation, the stability at room temperature (25°C) is judged to be OK and is indicated by "O"; when the cleaning composition is stable at 50°C for at least 2 weeks without visually observable separation, the high temperature (50°C) stability is judged to be OK and is indicated by "O"; when the requirement of "stable at 25°C for at least 2 weeks without visually observable separation" is not met, it is indicated by "X".

[0089] illustrate:

[0090] Unless otherwise specified, the following examples are calculated by weight percentage;

[0091] Unless otherwise specified, the total weight percentage of all ingredients in the composition is 100%.

[0092] All examples are water-based compositions, ie, the remainder is made up to 100% with water.

[0093] Effect of surfactants in Examples A1-A8

[0094] The formulas of Examples A1-A8 are shown in Table 1, and the preparation methods are as follows:

[0095] The raw materials were weighed according to the formula, and the surfactant and fatty acid were added into deionized water, and heated to 50° C. and stirred to dissolve to obtain the cleaning composition. The viscosity at 25° C. and the viscosity at 50° C. of the cleaning compositions of Examples A1-A8 were tested, and the results are shown in Table 1.

[0096] Table 1

[0097]

[0098] As can be seen from Table 1, Examples A1-A8 use the defined sodium taurine salt and lauric acid in combination to prepare cleaning compositions at a shear rate of 0.6 s -1 The viscosity at 25°C is greater than 1000 mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥ 0.3. It is stable at 25°C and 50°C for at least 2 weeks without visually observable separation, and has good room temperature (25°C) stability and high temperature (50°C) stability.

[0099] Effect of fatty acid type in Examples B1-B8

[0100] The formulas of Examples B1-B8 are shown in Table 2, and the preparation methods are as follows:

[0101] The raw materials were weighed according to the formula, and the surfactant and fatty acid were added into deionized water, and heated to 50° C. and stirred to dissolve to obtain the cleaning composition. The viscosity at 25° C. and the viscosity at 50° C. of the cleaning compositions of Examples B1-B8 were tested, and the results are shown in Table 2.

[0102] Table 2

[0103]

[0104]

[0105] As can be seen from Table 2, Examples B1-B8 use the defined sodium taurine salt and fatty acid in combination to prepare cleaning compositions at a shear rate of 0.6 s -1 The viscosity at 25°C is greater than 1000 mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥ 0.3. It is stable at 25°C and 50°C for at least 2 weeks without visually observable separation, and has good room temperature (25°C) stability and high temperature (50°C) stability.

[0106] Application Examples

[0107] The formulas of Application Examples F1-1 to F3-3, Comparative Examples 1-3, and Comparative Examples 1B-3B are shown in Table 3-4, and the preparation methods are as follows:

[0108] Weigh the raw materials according to the formula, add the surfactant and fatty acid into deionized water, heat to 50°C and stir to dissolve, add the remaining raw materials, continue to stir until uniform, and obtain the target product. The viscosity at 25°C and the viscosity at 50°C of the corresponding examples F1-1 to F3-3, comparative examples 1-3, and comparative examples 1B-3B were tested, and the results are shown in Table 3-4.

[0109] Table 3

[0110]

[0111]

[0112] Table 4

[0113]

[0114] It can be seen from Table 3 that the cleaning compositions prepared in Application Examples F1-1 to F3-3 have a shear rate of 0.6 s -1The viscosity at 25°C is greater than 1000mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥0.3. It is stable at 25°C and 50°C for at least 2 weeks, and no visually observable separation occurs, and it has good low-temperature and high-temperature stability. However, no fatty acid structurant is added to Comparative Examples 1-3, and the viscosity of the composition is very small and difficult to meet the requirements, and it is not stable. Comparative Examples 1B-3B do not use a fatty acid structurant but a thickener (PEG-150 stearate), which cannot simultaneously meet the conditions of a viscosity greater than 1000mPa.s at 25°C and a ratio of the viscosity at 50°C to the viscosity at 25°C of ≥0.3. The viscosity at room temperature (25°C) meets the requirements and is stable, but the viscosity at high temperature (50°C) drops sharply, so that the product is unstable.

[0115] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A cleaning composition comprising a layered structured surfactant system, characterized in that It is composed of the following raw materials: A) a taurate surfactant; the taurate surfactant is selected from alkanoyl taurate and / or methyl alkanoyl taurate; The alkanoyl taurate is at least one of sodium lauroyl taurate, sodium myristoyl taurate, and sodium cocoyl taurate; the methyl alkanoyl taurate is at least one of sodium methyl lauroyl taurate, sodium methyl myristoyl taurate, and sodium methyl cocoyl taurate; B) fatty acid; the fatty acid is a saturated or unsaturated fatty acid of C8-C20; C) Water; Acid-base regulator, wherein the acid-base regulator is at least one of citric acid, lactic acid, salicylic acid, glycolic acid, fruit acid, hydrochloric acid, and phosphoric acid; The fatty acid comprises at least one of oleic acid, coconut acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid; the total amount of the taurate surfactant is 1-15% by weight, and the amount of the fatty acid is 0.5-20% by weight; The viscosity of the cleaning composition at 25° C. at 0.6 s-1 is ≥1000 mPa.s, and the ratio of the viscosity at 50° C. to the viscosity at 25° C. is ≥0.

3.

2. The cleaning composition according to claim 1, characterized in that The total amount of the taurate surfactant is 3-15% by weight, and the amount of the fatty acid is 0.5-15% by weight.

3. The cleaning composition according to claim 1, characterized in that The cleaning composition has a pH of 2.5-5.

9.

4. The cleaning composition according to claim 1, characterized in that The cleaning composition further comprises a surfactant B other than the taurate surfactant A, wherein the amount of the surfactant B is 0-15% by weight; the surfactant B is selected from one or more of anionic surfactants, cationic surfactants, nonionic surfactants and zwitterionic surfactants.

5. Use of the cleaning composition containing the lamellar structured surfactant system according to any one of claims 1 to 4 in the preparation of a personal care detergent.

6. The use according to claim 5, characterized in that The personal care detergent also includes a hydrophobic skin or hair benefit agent; the hydrophobic skin or hair benefit agent includes at least one of silicone oil, hydrophobic plant extracts, hydrocarbons, higher alcohols, and esters.

7. The use according to claim 5, characterized in that The personal care detergent also includes a water-soluble skin or hair benefit agent; the water-soluble skin or hair benefit agent includes at least one of allantoin, urea, pyrrolidone carboxylic acid, pyrrolidone carboxylate, hyaluronic acid, hyaluronic acid salt, sorbic acid, sorbate, amino acid, polyol, and sugar.

8. The use according to claim 5, characterized in that The personal care detergent also includes additives, and the additives are selected from one or more of preservatives, chelating agents, fillers, penetrants, sunscreens, fragrances, dispersants, and film-forming agents.

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