Thickening composition based on betaine and alkylglycoside and use thereof

Abstract

Disclosed are thickening compositions based on betaine and alkyl glycoside and their use, the thickening compositions comprising (a) a salt of an N-long chain acyl amino acid, (b) a free N-long chain acyl amino acid, (c) a betaine amphoteric surfactant, (d) an alkyl glycoside surfactant, the related thickening compositions being able to be used for the preparation of personal care products, household cleaning products, industrial cleaning products.

Description

Technical Field

[0001] This invention relates to the field of thickening technology, and particularly to the thickening of cleaning compositions containing amino acid surfactants, and their application in various cleaning products. Background Technology

[0002] Conventionally, anionic surfactants such as alkyl sulfates and polyoxyethylene alkyl sulfates have been widely used as surfactants in hair / body cleansing bases. However, with the increasing frequency of shampooing / showering in recent years, they can sometimes cause dryness and irritation, thus requiring cleaners with less irritation. Furthermore, these are petroleum-derived surfactants, which contradicts the current trend towards sustainability and environmental protection.

[0003] The cosmetics and personal care industry has recognized the growing popularity and importance of sulfate-free and dioxane-free personal care cleaning products containing environmentally friendly, sustainable, and gentle surfactants. Amino acid-based surfactants are considered "greener," gentler, and more sustainable than traditional petroleum-based surfactants.

[0004] Developing high-quality, environmentally friendly surfactants has become a major direction for the surfactant industry, and the replacement of traditional petroleum-based surfactants with amino acid surfactants is an industry trend. Unilever announced that it will halve its use of petroleum-based products by 2025 and reduce it to zero by 2030. L'Oréal announced that it will replace 95% of its petroleum-based products by 2030. Therefore, it is essential to study the formulation systems related to amino acid surfactants.

[0005] Currently, amino acid surfactants are difficult to thicken. The main methods for thickening amino acid surfactants include: 1) using polymer thickeners, such as acrylate copolymers and cellulose compounds; 2) compounding nonionic (e.g., fatty alcohols, fatty acids, alkanolamides, alkyl glycosides), cationic, and amphoteric surfactants (e.g., betaines); 3) adding natural gums and their modifiers, such as carrageenan, guar gum, and xanthan gum. Each of these thickening methods has its own problems. Using polymer thickeners can lead to discoloration at high temperatures, a jelly-like phenomenon at low temperatures, reduced foaming effect and user experience, and a slippery feel after rinsing. Furthermore, high-molecular-weight polymers typically require very high dosages to achieve the desired thickening effect. Compounding with other surfactants for thickening currently focuses on conventional alkanolamides, alkyl glycosides, and betaines, but the thickening effect is limited, resulting in a cloudy, opaque (foggy) appearance, and viscosity decreases over long-term storage. Not only are gelatinous substances difficult to dissolve, but excessive amounts can also cause problems such as jelly-like texture, stringiness, and poor rheological properties.

[0006] In previous research, our team discovered that in the presence of free N-long-chain acyl amino acids, combined with hydrophilic nonionic surfactants and amphoteric surfactants, the three work synergistically to significantly improve the viscosity of the formulation.

[0007] Among hydrophilic nonionic surfactants, PEG-120 methylglucose difatty acid ester, PEG-120 methylglucose trifatty acid ester, PEG-150 pentaerythritol tetrafatty acid ester, and PEG-160 sorbitan trifatty acid ester contain long PEG segments, posing a potential risk of dioxane (1,4-dioxane). Currently, the cosmetics and personal care industry is moving towards greater safety, and some downstream cosmetic brands require products to be completely free of dioxane risk, which limits the use of hydrophilic nonionic surfactants with long PEG segments.

[0008] In addition, although hydrophilic nonionic surfactants such as polyglycerol-3-methylglucose dicarboxylic acid ester and polyglycerol-10 fatty acid ester can be selected, these substances are significantly more expensive than surfactants such as betaine and alkyl glycosides. Therefore, from a cost perspective, we hope to find a cheaper alternative thickening solution. Summary of the Invention

[0009] This invention discovers that, without using hydrophilic nonionic surfactants such as PEG150 and polyglycerol, thickening of an amino acid surfactant formulation system can be achieved by combining a specific amount of free N-long-chain acyl amino acids with betaine and alkyl glycosides.

[0010] Specifically, the present invention provides the following solution.

[0011] [1] A thickening composition comprising (a) a salt of an N-long-chain acyl amino acid, (b) a free N-long-chain acyl amino acid, (c) a betaine-type amphoteric surfactant, and (d) an alkyl glycoside surfactant; Alternatively, the composition comprises (a') an N-long-chain acyl amino acid neutralized with a base, with a degree of neutralization of less than 100%, such that it contains unneutralized free N-long-chain acyl amino acids, (c) a betaine-type amphoteric surfactant, and (d) an alkyl glycoside surfactant. Alternatively, the composition comprises (a'') a base and an N-long-chain acyl amino acid, wherein the molar number of the base is less than that of the N-long-chain acyl amino acid, such that the neutralization degree of the N-long-chain acyl amino acid is less than 100%, thereby containing free N-long-chain acyl amino acids, (c) a betaine amphoteric surfactant, and (d) an alkyl glycoside surfactant. Furthermore, the weight percentage of free N-long-chain acyl amino acids in the thickening composition is 2 wt%, preferably 2.4 wt% or more.

[0012] [2] According to the thickening composition of [1], the N-long chain acyl group in the N-long chain acyl amino acid is derived from saturated or unsaturated straight-chain or branched fatty acids with 8 to 22 carbon atoms.

[0013] [3] According to the thickening composition of [1] or [2], the amino acid in the N-long chain acyl amino acid is derived from one or more of alanine, glycine, glutamic acid, sarcosine, arginine, lysine, and (methyl)taurine.

[0014] [4] The thickening composition according to any one of [1]-[3], wherein the salt of the N-long chain acyl amino acid is one or more of the inorganic base salt, organic amine salt, and basic amino acid salt of the N-long chain acyl amino acid.

[0015] [5] The thickening composition according to any one of [1]-[4], wherein the base is selected from one or more inorganic bases, organic amines, and basic amino acids.

[0016] [6] In any one of the thickening compositions according to [1]-[5], the N-long chain acyl amino acid in (a), (a'), (a''), and (b) is lauroyl alanine.

[0017] [7] In any one of [1]-[6], the salt of (a) the N-long chain acyl amino acid is the arginine salt of the N-long chain acyl amino acid, and the base in (a') and (a'') is arginine.

[0018] [8] In any one of [1]-[7], the thickening composition, (c) is a betaine-type amphoteric surfactant, which is alkyl hydroxysulfonate betaine.

[0019] [9] The thickening composition according to any one of [1]-[8], wherein (d) the alkyl glycoside surfactant is selected from one or more of octyl glucoside, decyl glucoside, cocoyl glucoside, lauryl glucoside, stearyl glucoside, palmityl glucoside, APG0810, APG0814, APG1214, APG1618, APG1216, APG0816, and APG2022.

[0020]

[10] The thickening composition according to any one of [1]-[9], for (a') and (a''), the degree of neutralization is 70% or more, preferably 75% or more; and the degree of neutralization is less than 90%, preferably 85% or less.

[0021]

[11] In any one of [1]-

[10] , the thickening composition contains 10 wt% or more of component (a), (a') or (a'') in the thickening composition, preferably 12 wt% or more.

[0022]

[12] In any one of [1]-

[11] , the component (c) betaine-type amphoteric surfactant has a weight percentage of 2 wt% or more, preferably 3 wt% or more, in the thickening composition.

[0023]

[13] In any one of [1]-

[12] , the component (d) alkyl glycoside surfactant has a weight percentage of 3 wt% or more, preferably 5 wt% or more, in the thickening composition.

[0024]

[14] The thickening composition according to any one of [1]-

[13] has an N-long chain acyl amino acid and / or salt as the main surfactant, wherein the main surfactant is the surfactant that has the highest content among all surfactants in terms of weight percentage, preferably more than 50 wt% of all surfactants, and more preferably more than 65 wt%.

[0025]

[15] The use of a thickening composition as described in any one of [1]-

[14] in the preparation of personal care products, household cleaning products, and industrial cleaning products.

[0026]

[16] According to the application described in

[15] , the personal care products are shower gel, shampoo, facial cleanser, makeup remover, shaving products or hand soap; the household cleaning products are laundry detergent, dish soap, furniture and floor cleaner, fabric cleaner or kitchen cleaner.

[0027]

[17] A cosmetic product containing any one of the thickening compositions described in [1]-

[14] .

[0028]

[18] A cleaning product comprising any one of the thickening compositions described in [1]-

[14] .

[0029]

[19] A personal care product, household cleaning product or industrial cleaning product containing any one of the thickening compositions described in [1]-

[14] .

[0030] Compared with the prior art, the present invention has the following beneficial technical effects: This invention is the first to discover that, without using hydrophilic nonionic surfactants such as PEG150 and polyglycerol, thickening of an amino acid surfactant formulation system can be achieved by combining a specific amount of free N-long-chain acyl amino acids with betaine and alkyl glycosides. Detailed Implementation

[0031] The present invention provides a thickening composition comprising (a) a salt of N-long-chain acyl amino acids, (b) free N-long-chain acyl amino acids, (c) a betaine-based amphoteric surfactant, and (d) an alkyl glycoside surfactant.

[0032] Alternatively, the thickening composition comprises (a') an N-long-chain acyl amino acid partially neutralized with an alkali, (c) a betaine-based amphoteric surfactant, and (d) an alkyl glycoside surfactant. Wherein, (a') the N-long-chain acyl amino acid partially neutralized with an alkali refers to the product of the partial neutralization of the N-long-chain acyl amino acid with an alkali, the final product present in the composition being the salt of the N-long-chain acyl amino acid and the unneutralized free N-long-chain acyl amino acid.

[0033] Alternatively, the thickening composition may contain (a'') a base and an N-long-chain acyl amino acid, wherein the molar number of the base is less than that of the N-long-chain acyl amino acid, resulting in a neutralization degree of less than 100% for the N-long-chain acyl amino acid; (c) a betaine-type amphoteric surfactant; and (d) an alkyl glycoside surfactant. Although the base and the N-long-chain acyl amino acid are added to the formulation separately, they will inevitably react. Due to the neutralization degree being less than 100%, what ultimately exists in the composition are the salts of the N-long-chain acyl amino acid and unneutralized free N-long-chain acyl amino acids.

[0034] The free N-long-chain acyl amino acids in the thickening composition have a weight percentage of 2 wt%, preferably 2.4 wt% or more. Too little free N-long-chain acyl amino acids is detrimental to thickening the formulation. For example, the content of free N-long-chain acyl amino acids can be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, or 5.0 wt%.

[0035] The thickening composition may also include, as needed, carriers, additives, active ingredients, water, etc., acceptable in the fields of personal care products, household cleaning products, and industrial cleaning products.

[0036] For N-long-chain acyl amino acids, the N-long-chain acyl group is derived from a saturated or unsaturated straight-chain or branched fatty acid with 8 to 22 carbon atoms. Further, the N-long-chain acyl group in the N-long-chain acyl amino acid is selected from one or more of octanoyl, decanoyl, undecanoyl, lauroyl, myristoyl, pentadecanoyl, palmitoyl, stearoyl, oleoyl, linoleoyl, isostearoyl, coconut oil fatty acyl, and palm oil fatty acyl, preferably coconut oil fatty acyl or lauroyl, and most preferably lauroyl.

[0037] The amino acids in the N-long-chain acyl amino acids are derived from one or more of glycine, alanine, glutamic acid, sarcosine, aspartic acid, leucine, isoleucine, valine, threonine, proline, phenylalanine, arginine, lysine, and (methyl)taurine. Further, the amino acids in the N-long-chain acyl amino acids are derived from one or more of alanine, glycine, glutamic acid, sarcosine, arginine, lysine, and (methyl)taurine, preferably alanine, and most preferably L-alanine. The N-long-chain acyl (methyl)taurine described in this invention refers to N-long-chain acylmethyl taurine or N-long-chain acyl taurine.

[0038] As an example, N-long-chain acyl amino acids can be selected from cocoyl alanine, lauroyl alanine, cocoyl sarcosine, lauroyl sarcosine, lauroyl glutamic acid, cocoyl glutamic acid, oleyl glutamic acid, cocoyl glycine, lauroyl glycine, stearoyl glutamic acid, etc.

[0039] This invention reveals that N-long-chain acyl amino acids with different structures exhibit varying thickening abilities. Under the same formulation conditions, lauroyl alanine demonstrates a significantly greater thickening ability than other long-chain acyl amino acids.

[0040] (a) A salt of an N-long-chain acyl amino acid is a salt formed by an N-long-chain acyl amino acid and a base. The base is selected from one or more of inorganic bases, organic amines, and basic amino acids. The inorganic base is selected from one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate, preferably sodium hydroxide or potassium hydroxide. The organic amine is selected from amines, alkanolamines, etc. For basic amino acids, it is selected from one or more of arginine, lysine, citrulline, ornithine, creatine, histidine, diaminobutyric acid, and diaminopropionic acid, preferably arginine and / or lysine, and most preferably L-arginine. The bases described in (a') and (a'') also have the same definition.

[0041] N-long-chain acyl amino acids can be directly mixed into commercially available long-chain acyl amino acid salts such as Puji's YB02-30 (sodium cocoylaminopropionate), AS02-30 (sodium lauroyl sarcosinate), Tianci's AMIN LS30 (sodium lauroyl sarcosinate), Suzhou Weimei's LA-Arg 30 (lauroyl alanine arginine salt), and LA-Na 30 (sodium lauroyl alanine), or N-long-chain acyl amino acids can be directly mixed into formulations containing (a) N-long-chain acyl amino acid salts to obtain (a) N-long-chain acyl amino acid salts and (b) free N-long-chain acyl amino acids.

[0042] Alternatively, N-long-chain acyl amino acids can be partially neutralized with a base to obtain (a') N-long-chain acyl amino acids partially neutralized with a base. Alternatively, a base and an N-long-chain acyl amino acid can be added to the formulation separately (corresponding to (a'')). Since the base is used for partial neutralization and the N-long-chain acyl amino acid is in excess, the system will contain both the neutralized N-long-chain acyl amino acid salt and the unneutralized free N-long-chain acyl amino acid, which is essentially equivalent to (a) the salt of the N-long-chain acyl amino acid + (b) the free N-long-chain acyl amino acid.

[0043] Increasing the amount of N-long-chain acyl amino acid salts and free N-long-chain acyl amino acids can improve the viscosity of the composition. However, excessive amounts will result in an overly viscous formulation, while insufficient amounts will lead to insufficient viscosity. Formulators can choose the appropriate amount based on the viscosity requirements of the actual product; alternatively, if the viscosity is too high, it can be reduced by diluting with water.

[0044] Furthermore, the weight percentage of (a), (a'), or (a'') in the thickening composition is 10 wt% or more, preferably 12 wt% or more. If the amount is too small, the formulation viscosity will be low. For example, it can be 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt%, 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, or 30 wt%. Appropriate amounts of N-long-chain acyl amino acids and / or salts allow the formulation to balance viscosity, cleaning power, and washing feel. Particularly preferred is that the N-long-chain acyl amino acids and / or salts are the main surfactants in the formulation; the main surfactant is defined as the surfactant with the highest content among all surfactants by weight percentage. Preferably, the main surfactant has a weight percentage of more than 50 wt% in all surfactants; for example, more than 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, or 80 wt%.

[0045] Furthermore, for (a') and (a''), the degree of neutralization is controlled to be above 70%, preferably above 75%; and the degree of neutralization is less than 90%, more preferably below 85%. For example, the degree of neutralization is 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, and 89%. If the neutralization is too low, the low-temperature stability is poor, and the formulation is prone to precipitation. If the neutralization is too high, there is insufficient free N-long-chain acyl amino acids, and the thickening effect is limited. The aforementioned degree of neutralization refers to the percentage of N-long-chain acyl amino acids that are neutralized. For example, 80% neutralization means that 80% of all N-long-chain acyl amino acids are neutralized by alkali to form salts, and the remaining 20% ​​are free N-long-chain acyl amino acids.

[0046] Accordingly, for (a), the molar ratio of the salt of (a) N-long-chain acyl amino acid to the free N-long-chain acyl amino acid is 8:1 to 2.5:1, preferably 5.5:1 to 3:1. For example, the molar ratio of the salt of (a) N-long-chain acyl amino acid to the free N-long-chain acyl amino acid can be 8:1, 7.5:1, 7:1, 6.5:1, 6:1, 5.5:1, 5:1, 4.5:1, 4:1, 3.5:1, or 3:1. Taking 4:1 as an example, this is equivalent to 80% of the N-long-chain acyl amino acid being neutralized, leaving 20% ​​of the free N-long-chain acyl amino acid.

[0047] The synthesis process of N-long-chain acyl amino acid surfactants can refer to the general synthesis methods of N-acyl amino acid type surfactants, and is divided into direct methods and indirect methods. Direct synthesis methods from fatty acid raw materials include enzyme-catalyzed synthesis and dehydration condensation. Indirect synthesis methods include acylation of fatty acid acyl chlorides, hydrolytic acylation of fatty acid nitriles, acylation of fatty acid anhydrides, and amide carbonylation reactions. A preferred method is preparation via the amino reaction of fatty acyl chlorides with amino acids (Shotten-Baumann condensation reaction or Shotten-Baumann reaction).

[0048] A typical preparation process suitable for this invention is as follows: amino acids and sodium hydroxide are dissolved in water or a mixture of water and acetone to obtain an amino acid salt solution; then lauroyl chloride and sodium hydroxide solution are slowly added dropwise to the amino acid salt solution, controlling the pH of the reaction system; after the addition is complete, post-processing of the product is performed. Representative methods are disclosed in CN1798821A, US6703517B2, CN102875409B, JPH0570418A, etc.

[0049] For the post-processing of N-long-chain acyl amino acid products, conventional methods such as recrystallization, water washing, and drying can be used. A preferred post-processing step includes the following steps: mixing the crude N-long-chain acyl amino acid with a solvent, optionally stirring, and controlling the temperature T of the mixed system to be above the melting point of the long-chain fatty acid and below the melting point of the N-long-chain acyl amino acid. The solvent is water, an organic solvent, or a mixture of water and an organic solvent. After temperature control, solid-liquid separation is performed. Related methods are disclosed by the inventors in CN202210867760.7 and PCT / CN2022 / 107270, the contents of which are incorporated herein by reference.

[0050] For component (c), the betaine-based amphoteric surfactant, it is selected from one or more of alkyl betaine (Formula I), alkylamidopropyl betaine (Formula II), alkyl hydroxysulfonyl betaine (Formula III), and alkylamidopropyl hydroxysulfonyl betaine (Formula IV). Alkyl hydroxysulfonyl betaine is particularly preferred in this invention because it has the best thickening effect.

[0051] (I); (II); (III); (VI) Furthermore, the weight percentage of component (c) in the thickening composition is 2 wt% or more, preferably 3 wt% or more. For example, it can be 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, or 10 wt%. If the amount of component (c) is too small, the thickening effect will be limited.

[0052] For component (d) alkyl glycoside surfactants, classified according to "fatty alcohol carbon chain length", there are short carbon chains (C8-C10), medium carbon chains (C12-C14), long carbon chains (C16-C18), and combinations of different carbon chains, which are further selected from one or more of octyl glucoside, decyl glucoside, cocoyl glucoside, lauryl glucoside, stearyl glucoside, palmityl glucoside, APG0810, APG0814, APG1214, APG1618, APG1216, APG0816, and APG2022.

[0053] Furthermore, the weight percentage of component (d) in the thickening composition is 3 wt% or more, preferably 5 wt% or more. For example, it can be 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14, 14.5, or 15 wt%. If the amount of component (d) is too small, the thickening effect will be limited.

[0054] The thickening composition may further contain other ingredients such as preservatives, fragrances / flavors, conditioning agents, dyes, chelating agents, extracts, amino acids, nucleic acids, vitamins, enzymes, anti-inflammatory agents, bactericides, antioxidants, UV absorbers, antiperspirants, pH adjusters, pearlescent agents, etc.

[0055] The thickening composition of the present invention can be used to prepare personal care products, household cleaning products, industrial cleaning products, etc. The personal care products include shower gel, shampoo, facial cleanser, makeup remover, shaving products, or hand soap; the household cleaning products include laundry detergent, dish soap, furniture and floor cleaner, fabric cleaner, or kitchen cleaner.

[0056] In each implementation, details such as the selection of types and dosages not discussed can be referred to the relevant guidance of other implementations if there is no conflict in the content. For the sake of brevity, each implementation has not been described in detail.

[0057] Unless otherwise specified, "above", "below", and "A~B" in this invention all include the stated number.

[0058] The present invention will be further illustrated below with reference to embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalents also fall within the scope defined by the appended claims.

[0059] Example 1. Description of test materials LA stands for lauroyl alanine (from Suzhou Weimei), and Arg stands for arginine (from Suzhou Weimei).

[0060] 2. Test instruments Viscometer: Lichen rotational viscometer, model LC-NDJ-55.

[0061] 3. Experimental Procedure Unless otherwise specified, weigh each component according to the formula, heat to 70-85℃ and keep stirring until homogeneous. After the prepared sample has stabilized, take it out, select a suitable rotor and speed, and use a viscometer to test the viscosity of the sample.

[0062] Table 1. Effect of betaine dosage (wt% is the content after 100% conversion) The results showed that the formulation system could not achieve effective thickening when betaine was lacking or insufficient.

[0063] Table 2. Effect of alkyl glycoside dosage (wt% is the content after conversion to 100%) The results showed that the formulation system could not achieve effective thickening when alkyl glycosides were lacking or insufficient in amount.

[0064] Table 3. Effect of LA and free LA content (wt% is the content after conversion to 100%) The results showed that the viscosity gradually increased with the increase of LA and free LA content.

[0065] Table 4. Effect of LA neutralization degree (wt% is the content after conversion to 100%) The results showed that LA was 100% neutralized, and the system lacked unneutralized free LA, resulting in no thickening. As the degree of neutralization decreased, the free LA content increased, and when the free LA content exceeded 2%, the formulation system began to have a certain viscosity.

[0066] Table 5. Effect of Alkyl Glycoside Type (wt% is content after conversion to 100%) The results showed that the type of alkyl glycoside had little impact, and all of them could effectively thicken the formulation system.

[0067] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention and form different embodiments.

Claims

1. A thickening composition, characterized in that, The composition comprises (a) a salt of an N-long-chain acyl amino acid, (b) a free N-long-chain acyl amino acid, (c) a betaine-type amphoteric surfactant, and (d) an alkyl glycoside surfactant. Alternatively, the composition comprises (a') an N-long-chain acyl amino acid neutralized with a base, with a degree of neutralization of less than 100%, such that it contains unneutralized free N-long-chain acyl amino acids, (c) a betaine-type amphoteric surfactant, and (d) an alkyl glycoside surfactant. Alternatively, the composition comprises (a'') a base and an N-long-chain acyl amino acid, wherein the molar number of the base is less than that of the N-long-chain acyl amino acid, such that the neutralization degree of the N-long-chain acyl amino acid is less than 100%, thereby containing free N-long-chain acyl amino acids, (c) a betaine-type amphoteric surfactant, and (d) an alkyl glycoside surfactant. Furthermore, the weight percentage of free N-long-chain acyl amino acids in the thickening composition is 2 wt% or more, preferably 2.4 wt% or more.

2. The thickening composition according to claim 1, characterized in that, The N-long chain acyl group in the N-long chain acyl amino acid is derived from saturated or unsaturated straight-chain or branched fatty acids with 8 to 22 carbon atoms. And / or, the amino acids in the N-long-chain acyl amino acids are derived from one or more of alanine, glycine, glutamic acid, sarcosine, arginine, lysine, and (methyl)taurine; And / or, the salt of the N-long-chain acyl amino acid is one or more of the following: inorganic base salt, organic amine salt, and basic amino acid salt of N-long-chain acyl amino acid; And / or, the base is selected from one or more of inorganic bases, organic amines, and basic amino acids.

3. The thickening composition according to claim 1, characterized in that, The N-long-chain acyl amino acid mentioned in (a), (a'), (a''), and (b) is lauroyl alanine.

4. The thickening composition according to claim 1, characterized in that, (a) The salt of N-long chain acyl amino acid is the arginine salt of N-long chain acyl amino acid, and the base mentioned in (a') and (a'') is arginine.

5. The thickening composition according to claim 1, characterized in that, (c) The betaine-type amphoteric surfactant is alkyl hydroxysulfonate betaine.

6. The thickening composition according to claim 1, characterized in that, (d) Alkyl glycoside surfactants are selected from one or more of octyl glucoside, decyl glucoside, cocoyl glucoside, lauryl glucoside, stearyl glucoside, palmyl glucoside, APG0810, APG0814, APG1214, APG1618, APG1216, APG0816, and APG2022.

7. The thickening composition according to claim 1, characterized in that, For (a') and (a''), the degree of neutralization is above 70%, preferably above 75%; and the degree of neutralization is less than 90%, preferably below 85%.

8. The thickening composition according to claim 1, characterized in that, The weight percentage of component (a), (a') or (a'') in the thickening composition is 10 wt% or more, preferably 12 wt% or more; And / or, the component (c) betaine-based amphoteric surfactant has a weight percentage of 2 wt% or more, preferably 3 wt% or more, in the thickening composition; And / or, the component (d) alkyl glycoside surfactant has a weight percentage of 3 wt% or more, preferably 5 wt% or more, in the thickening composition.

9. The use of a thickening composition according to any one of claims 1-8 in the preparation of personal care products, household cleaning products, and industrial cleaning products.

10. A cleaning product comprising the thickening composition according to any one of claims 1-8.

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