A high-stability thickening agent, a preparation method thereof and application thereof in a detergent

Abstract

The application relates to the technical field of daily chemical industry, and discloses a high-stability thickening agent, a preparation method thereof and application of the thickening agent in detergents. The thickening agent comprises the following components in mass percentage: polyethylene glycol double fatty acid ester 30-40%, AES 30-40%, fatty alcohol polyoxyethylene ether with an EO number of 2-5 10-20%, preservative 0-1%, and the balance of water. In the application, the thickening agent is prepared by compounding specific components and controlling the component proportion, and the components are synergistic with each other, so that the thickening agent composition presents a state with good flowability at room temperature, and is long-term stable and does not separate and deposit. Meanwhile, the thickening agent has higher thickening efficiency in the detergent, the viscosity after thickening is relatively stable, and the thickening agent can also be used in difficult thickening detergent formulations such as sulfonic acid-free, full nonionic and low active matter.

Description

Technical Field

[0001] This invention relates to the technical field of daily chemical products, and in particular to a highly stable thickener, its preparation method, and its application in detergents. Background Technology

[0002] The appearance of liquid detergents, personal care products, and daily chemical products is one of the important indicators of product quality control. To ensure ease of use for consumers and meet aesthetic requirements, these products typically need a certain viscosity—good flowability without excessively rapid runoff. Therefore, thickeners are an indispensable key component in liquid detergent formulations.

[0003] The following are some of the most common thickening methods currently available on the market: 1. Refined salt; Refined salt (sodium chloride) has a significant and low-cost thickening effect on laundry detergents containing anionic surfactants. For example, patent CN121046156A discloses a color-protecting and color-blocking laundry detergent that uses sodium chloride as a thickener. However, refined salt has certain requirements for detergent formulations. When the anionic surfactant content in the formulation is relatively low or in a sulfonic acid-free system, the thickening efficiency is extremely low or it cannot thicken at all. Moreover, when the refined salt content is high, it may cause the system to turn white and easily precipitate. 2. Amine oxide surfactants; Most formulas also add amine oxide surfactants to thicken the product, but amine oxides are not commonly used in laundry detergents because these surfactants have excellent foam stability, and for machine washing, too much foam during the washing process will make the rinsing process more difficult. 3. Natural modified polymers; common natural polymer thickeners include cellulose, xanthan gum, etc., but the disadvantages of this type of thickener are that the thickening efficiency is relatively low, and it is easily degraded by microbial contamination, resulting in a decrease in viscosity; some products have poor transparency, which affects the appearance of the formula. 4. Synthetic polymers; the most common synthetic polymer thickeners are carbomer, polyacrylate polymers, etc., which have the advantages of extremely high thickening efficiency (0.1%-1% is sufficient) and good transparency. However, these polymers are extremely sensitive to electrolytes and are prone to flocculation; and the pH value needs to be precisely controlled, making the operation complicated.

[0004] Therefore, developing a thickener composition that can effectively thicken, is easy to operate, and maintains system stability has important practical application value. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a highly stable thickener, its preparation method, and its application in detergents. The thickener is a compound of fatty alcohol polyoxyethylene ether with an EO number of 2-5, polyethylene glycol difatty acid ester, and AES. The three components work synergistically to ensure the thickener composition exhibits good fluidity at room temperature. The thickener composition remains stable over a long period without stratification or precipitation. Simultaneously, the viscosity of detergents using this thickener remains relatively stable. Thickening can also be achieved in all-nonionic and low-reactive-content detergent formulations.

[0006] The objective of this invention is achieved through the following technical solution: In a first aspect, the present invention provides a highly stable thickener, the thickener comprising the following components by mass percentage: (1) Polyethylene glycol difatty acid ester 30~40%; (2) AES 30~40%; (3) 10-20% of fatty alcohol polyoxyethylene ethers with an EO number of 2-5; (4) Preservatives 0-1%; (5) Water balance.

[0007] When polyethylene glycol difatty acid esters are added to detergent compositions as thickeners, their thickening efficiency is not high, especially in detergents with low anionic content (no sulfonic acid or low sulfonic acid). Furthermore, polyethylene glycol difatty acid esters are waxy solids with a melting point of around 60°C, requiring heating to dissolve them during use, which consumes energy and complicates the production process.

[0008] Therefore, the present invention uses fatty alcohol polyoxyethylene ether with an EO number of 2-5 to synergistically thicken it, which can improve the thickening effect of polyethylene glycol difatty acid ester. It can also achieve thickening in all nonionic detergents, and the thickener is flowable at room temperature.

[0009] However, to achieve a good thickening effect in detergents, a relatively high amount of polyethylene glycol difatty acid ester is still required in the thickener composition of this invention. However, high concentrations of polyethylene glycol difatty acid ester can lead to precipitation and stratification during long-term storage. This invention discovers that in a high-concentration AES system, the high concentration promotes the formation of worm-like micelles that intertwine to form a three-dimensional network, thereby imparting a suspension effect and preventing the precipitation and sedimentation of high-concentration polyethylene glycol difatty acid ester.

[0010] Meanwhile, high concentrations of AES (30-60%) can cause gelation. However, this invention found that this phenomenon does not occur when polyethylene glycol difatty acid ester is added and the ratio is controlled. This may be because polyethylene glycol difatty acid ester is itself a nonionic surfactant, which means that it can insert into the micelles formed by AES and become part of the micelles. Its insertion dilutes the charge density on the surface of the micelles and weakens the electrostatic forces of the micelle structure. At the same time, its large molecular structure also changes the geometric stacking parameters of the surfactant, making it more inclined to form spherical and other structures with better flowability.

[0011] Therefore, this invention uses a compound of fatty alcohol polyoxyethylene ether with an EO number of 2-5, high content polyethylene glycol difatty acid ester, and high content AES as a thickener. The high content of AES possesses the ability to construct a suspension network, which can suspend and stabilize the high content of polyethylene glycol difatty acid ester in the composition. Simultaneously, the long polyethylene glycol chains in the polyethylene glycol difatty acid ester can effectively insert into the spaces between AES micelles, reducing entanglement density and transforming the rigid gel formed by excessive micelle entanglement of high-content AES into a flexible rheological network with a yield value. The two substances complement each other. Furthermore, the addition of fatty alcohol polyoxyethylene ether with an EO number of 2-5 can improve the thickening efficiency of polyethylene glycol difatty acid ester. The final result is a thickener composition with stable appearance and high thickening efficiency. This composition can remain stable for a long time without stratification or precipitation, and the viscosity of detergents using this thickener also remains relatively stable.

[0012] Preferably, the polyethylene glycol difatty acid ester is prepared by esterification of polyethylene glycol and two natural fatty acids with ≥C16 carbon atoms.

[0013] Preferably, the polyethylene glycol is selected from one or more polyethylene glycols with an average molecular weight of 400 to 20,000. The polyethylene glycol is selected from PEG400, PEG800, PEG6000, PEG20000, etc.

[0014] Preferably, the natural fatty acids are selected from lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, etc.

[0015] Preferably, the polyethylene glycol difatty acid ester is selected from common commercially available polyethylene glycol difatty acid ester raw materials, such as polyethylene glycol 6000 distearate.

[0016] Preferably, the fatty alcohol polyoxyethylene ether has a carbon number of C8 to C12.

[0017] Preferably, the AES has a carbon number of C8 to C12.

[0018] Preferably, the preservative includes one or more of phenoxyethanol, sodium benzoate, methylisothiazolinone, and methylchloroisothiazolinone.

[0019] Secondly, the present invention provides a method for preparing a highly stable thickener, comprising the following steps: Step 1: Mix fatty alcohol polyoxyethylene ether, polyethylene glycol difatty acid ester and water, and heat and stir until the polyethylene glycol difatty acid ester is completely dissolved; Step 2: Add AES and mix well; Step 3: After cooling, add the preservative and stir well.

[0020] Preferably, the heating temperature is 60~70℃; the cooling temperature is 25~35℃.

[0021] Thirdly, the present invention provides an application of a highly stable thickener in detergents, comprising: adding an appropriate amount of thickener to the detergent to be thickened according to viscosity requirements, and stirring evenly.

[0022] Preferably, the surfactant in the detergent to be thickened does not contain sulfonic acid anionic surfactants.

[0023] Preferably, the surfactant in the detergent to be thickened does not contain anionic surfactants.

[0024] Preferably, the surfactant in the detergent to be thickened is only a nonionic surfactant; the mass content of the nonionic surfactant is ≥10%.

[0025] Fourthly, the present invention provides a detergent comprising a thickener and a surfactant; wherein the thickener is the aforementioned high-stability thickener.

[0026] Preferably, the surfactant in the detergent does not contain sulfonic acid anionic surfactants.

[0027] Preferably, the surfactant in the detergent does not contain anionic surfactants.

[0028] Preferably, the surfactant in the detergent is only a nonionic surfactant; the mass content of the nonionic surfactant is ≥10%.

[0029] Compared with the prior art, the present invention has the following beneficial effects: (1) Fatty alcohol polyoxyethylene ether with an EO number of 2-5, polyethylene glycol difatty acid ester and AES are compounded as thickeners. The suspension effect of high concentration of AES can stabilize the composition. Polyethylene glycol fatty acid ester can eliminate the gel formed by high concentration of AES, so that the composition has good fluidity at room temperature. Finally, a thickener with stable appearance and high thickening efficiency is obtained. (2) The preparation and use of this thickener composition are relatively convenient. At the same time, it is very stable in detergents and has a high content of active ingredients. Adding this thickener composition to detergents can also improve the content of active ingredients and the detergency of detergents. (3) Through testing, the thickener composition can also achieve thickening in all nonionic and low-activity detergent formulations. At the same time, the thickener composition remains stable for a long time without stratification or precipitation, and the viscosity of the detergent using the thickener also remains relatively stable. Detailed Implementation

[0030] The technical solution of the present invention will be illustrated below with specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0031] The high-stability thickener of this invention comprises the following components by mass percentage: (1) Polyethylene glycol difatty acid ester 30~40%; (2) AES 30~40%; (3) 10-20% of fatty alcohol polyoxyethylene ethers with an EO number of 2-5; (4) Preservatives 0-1%; (5) Water balance.

[0032] In a specific embodiment of the present invention, the polyethylene glycol difatty acid ester is prepared by esterification of polyethylene glycol and two natural fatty acids with ≥C16 carbon atoms. The polyethylene glycol is selected from one or more polyethylene glycols with an average molecular weight of 400-20000, specifically PEG400, PEG800, PEG6000, PEG20000, etc. The natural fatty acid is selected from lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, etc.

[0033] In a specific embodiment of the present invention, the fatty alcohol polyoxyethylene ether has a carbon number of C8 to C12.

[0034] In a specific embodiment of the present invention, the carbon number of AES is C8 to C12.

[0035] In a specific embodiment of the present invention, the preservative includes one or more of phenoxyethanol, sodium benzoate, methylisothiazolinone, and methylchloroisothiazolinone.

[0036] The preparation method of the highly stable thickener in this invention includes the following steps: Step 1: Mix fatty alcohol polyoxyethylene ether with an EO number of 2 to 5, polyethylene glycol difatty acid ester and water, heat to 60 to 70°C while stirring, until the polyethylene glycol difatty acid ester is completely dissolved. Step 2: Add AES and mix well; Step 3: After cooling to 25~35℃, add the preservative and stir well.

[0037] The application of the high-stability thickener in detergents according to this invention includes: adding an appropriate amount of thickener to the detergent to be thickened according to viscosity requirements, and stirring until homogeneous. The surfactant in the detergent to be thickened does not contain sulfonic acid anionic surfactants, or does not contain anionic surfactants, or is only a nonionic surfactant.

[0038] The detergent of this invention includes a highly stable thickener. The surfactant in the detergent is free of sulfonic acid anionic surfactants, or contains no anionic surfactants, or is only a nonionic surfactant.

[0039] In specific embodiments of the present invention, in addition to surfactants, the detergent to be thickened may also include other additives such as enzyme preparations, acid-base neutralizers, color protectants, antibacterial agents, softeners, anti-redeposition agents, chelating agents, and preservatives.

[0040] The reagents used in the examples and comparative examples are as follows: AES: Sodium fatty alcohol polyoxyethylene ether sulfate, with a raw material content of 70% by mass. AEO9: Fatty alcohol polyoxyethylene ether with an EO number of 9, and a raw material mass content of ≥99%; 638: Polyethylene glycol fatty acid ester, raw material mass content ≥99%; AEO3: Fatty alcohol polyoxyethylene ether with an EO number of 3, and a raw material mass content of ≥99%; APG: Alkyl glycoside, with a raw material content ≥99%.

[0041] The performance tests of the thickeners prepared in the examples and comparative examples are as follows: Long-term stability assessment: The prepared thickener was placed at room temperature and in an oven at 45°C for one month to observe whether precipitation or stratification occurred in the liquid.

[0042] Examples 1-2 and Comparative Examples 1-5 (Thickeners) The preparation of thickeners includes the following steps: Step 1: Mix fatty alcohol polyoxyethylene ether with an EO number of 2 to 5, polyethylene glycol difatty acid ester and water, heat to 65°C while stirring, until the polyethylene glycol difatty acid ester is completely dissolved. Step 2: Add AES and mix well; Step 3: After cooling to 30℃, add the preservative and stir well.

[0043] Table 1. Component formulations of the thickeners in Example 1 and Comparative Examples 1-2

[0044] Table 1 shows that AES (sodium fatty alcohol polyoxyethylene ether sulfate), as the core skeleton component of the system, is crucial to the storage stability of the thickener composition. A comparison of the results from Comparative Examples 1 and 2 with Example 1 verifies that when the mass percentage of AES in the formulation reaches 30% or more, the resulting three-dimensional network structure possesses sufficient structural strength and yield stress to stabilize the polyethylene glycol difatty acid ester component in the suspension system, achieving the effect of long-term storage of the thickener composition without stratification or precipitation.

[0045] From a microscopic perspective, high-concentration AES molecules spontaneously assemble into long-term entangled worm-like micelles or even layered liquid crystal structures. These micelles form a continuous spatial network through electrostatic repulsion and hydrophobic interactions, giving the system a certain yield value and structural viscosity. This allows for physical anchoring and spatial confinement of hydrophobic components such as polyethylene glycol difatty acid esters, which have differences in density and polarity. When the AES content is below 30%, the system cannot form a complete and continuous micelle network, and the structural viscosity and yield stress are insufficient to resist the upward or aggregation tendency of polyethylene glycol difatty acid esters due to density differences. During standing, phase separation gradually occurs, leading to instability phenomena such as stratification and precipitation. When the AES content increases to 30% or higher, the density and mechanical strength of the micelle network significantly improve, sufficient to withstand the gravitational sedimentation and phase migration driving forces of the dispersed phase, ensuring the uniformity of the composition's appearance and storage stability.

[0046] Table 2. Component formulations of the thickeners in Examples 2 and Comparative Examples 3-5

[0047] As shown in Table 2, comparing Example 2 and Comparative Example 3, the amount of AES added in Comparative Example 3 was excessive, or its mass ratio relative to polyethylene glycol dicarboxylate was too high. In this case, even if the formulation contained polyethylene glycol dicarboxylate, it could not completely dissolve the dense gel formed by the high concentration of AES, directly leading to a significant decrease in the fluidity of the thickener composition at room temperature, even resulting in a paste-like state that was difficult to pour. Simultaneously, excessive AES would significantly deviate from the hydrophilic-hydrophobic balance of the system. When subsequently diluted and applied to detergent formulations, the excessively high proportion of anionic surfactants would interfere with the formation of worm-like micelles, thus reducing thickening efficiency and failing to achieve the desired thickening effect in low-activity formulations.

[0048] Comparing Example 2 and Comparative Example 4, Comparative Example 4 did not add AEO3 (fatty alcohol polyoxyethylene ether with EO number of 2 to 5). Although the resulting thickener still had good room temperature fluidity and long-term stability, its thickening efficiency was low, especially in nonionic detergent formulations where it could not achieve thickening and viscosity adjustment.

[0049] Comparing Example 2 and Comparative Example 5, Comparative Example 5 added AEO9 instead of AEO3 to the thickener formulation. Since AEOs with different EO numbers differ significantly in their hydrophilic-lipophilic balance and intermolecular interaction mechanisms, this directly affects the final composition's state and performance. Replacing the specified AEO3 with AEO9 in the formulation resulted in a significant deterioration in the thickener's physical state. The freezing point of AEO increases with the EO number. AEO9's natural freezing point is much higher than room temperature, and it is in a paste to semi-solid state at room temperature. Simultaneously, its long polyoxyethylene chains can form numerous intermolecular hydrogen bonds. When combined with high concentrations of AES and 638, this further intensifies molecular aggregation and crystallization, causing the overall composition to transition from a liquid to a solid state, ultimately solidifying and losing its fluidity at room temperature.

[0050] Examples 3-5 and Comparative Examples 6-9 (Application of Thickeners in Detergents) The preparation of detergent includes the following steps: Add water and anionic surfactant to the container and stir until well mixed; Add nonionic surfactant and acid-base adjuster to the container, adjust the pH to 7-10, and stir well; (3) Add preservatives and enzyme preparations to the container and stir well to obtain detergent.

[0051] Depending on the viscosity requirements, add an appropriate amount of thickener and / or refined salt to the detergent to be thickened, and stir well.

[0052] Table 3. Component formulations and thickening effects of detergents in Examples 3-5 and Comparative Examples 6-7.

[0053] As is well known, the thickening system of traditional detergents highly relies on anionic surfactants, among which alkylbenzene sulfonic acid (LAS) is the most commonly used thickening skeleton component. Combined with electrolytes such as sodium chloride to induce the aggregation of anionic micelles to form rod-like structures, the viscosity of the system can be rapidly increased. As shown in Table 3, the detergent in Comparative Example 6 is a low-anionic surfactant system without sulfonic acid, and it is difficult to increase the viscosity by adding salt. However, in the same sulfonic acid-free detergent formulation as Comparative Example 6, adding 3% of the thickener composition from Example 1 in Example 3 achieves a significant thickening effect, adjusting the system viscosity to a usable range (>200 mPa·s).

[0054] Furthermore, Comparative Example 7 employed a completely nonionic system devoid of any anionic surfactants, further increasing the difficulty of thickening. Nonionic surfactants have a more loosely structured micelle structure and extremely low responsiveness to electrolytes, rendering conventional salt-based thickening methods almost entirely ineffective, making it difficult to increase detergent viscosity. However, in a completely nonionic detergent formulation identical to Comparative Example 7, Example 4, by adding 5% of the thickener composition from Example 1, could adjust the system viscosity to over 200 mPa·s, meeting the viscosity requirements for everyday detergent use.

[0055] This effect stems from the unique compound design of the thickener in this invention. The fatty alcohol polyoxyethylene ether with an EO number of 2 to 5 works synergistically with the high content of polyethylene glycol difatty acid ester to build a continuous micelle network in a sulfonic acid-free system, thereby improving the thickening efficiency of the single polyethylene glycol difatty acid ester. The high concentration of AES plays a suspending skeleton role due to its aggregation characteristics, providing basic structural support for the system. The polyethylene glycol difatty acid ester can eliminate the gel phase that is easily formed by high concentration of AES, avoid the formation of gel lumps in the system, and allow the composition to maintain good fluidity and compatibility at room temperature.

[0056] If the formulation requires higher viscosity, the scheme in Example 5 can be referred to, and synergistic thickening can be achieved by adding an appropriate amount of salt and thickener, or the amount of thickener added can be increased.

[0057] Table 4. Component formulations and thickening effects of detergents in Examples 6-9

[0058] As shown in Table 4, compared with Example 4, Comparative Example 8 used the thickener from Comparative Example 4 (without AEO3) for thickening to verify the negative impact of not adding AEO3 (fatty alcohol polyoxyethylene ether with EO number 2-5) on the system. Although the thickener in Comparative Example 4 had better flowability and stability, its thickening ability was weak. In this case, the system relied solely on polyethylene glycol difatty acid ester for thickening. The thickening efficiency of polyethylene glycol difatty acid ester as a single thickener added to detergents with low anionic content (no sulfonic acid or low sulfonic acid) was low, and it was even more difficult to adapt to all-nonionic detergent formulations. In all-nonionic systems, the surfactant micelles themselves have a loose structure and weak intermolecular forces, making it difficult to induce ordered aggregation of micelles using conventional thickening methods. In the thickener system lacking AEO3, it is difficult to construct a continuous three-dimensional network structure by relying solely on the combination of AES and polyethylene glycol difatty acid ester. The frictional resistance within the system cannot be effectively improved, ultimately resulting in thickening failure.

[0059] The unique structure of fatty alcohol polyoxyethylene ethers with EO numbers of 2-5 provides them with a perfect balance of hydrophilicity and lipophilicity. Their long-chain structures can be embedded in gel networks constructed from polyethylene glycol difatty acid esters, acting similarly to crosslinking agents or network fillers. They can more tightly connect different components in the network through intermolecular forces (such as hydrophobic interactions and hydrogen bonds), making the entire three-dimensional network structure more stable and larger, thereby binding more water and micelles and significantly increasing viscosity. In contrast, Comparative Example 9 uses the thickener from Comparative Example 5 (AEO9) for thickening. AEO9 has a longer EO chain, and its molecules are predominantly hydrophilic, resulting in a significantly weakened hydrophobic association ability. Therefore, it cannot form an effective synergistic thickening structure with polyethylene glycol difatty acid esters, and thus cannot exert a thickening effect on the all-nonionic detergent system.

[0060] Therefore, in the thickener compound system containing fatty alcohol polyoxyethylene ether in this invention, the EO addition number is the core parameter affecting the system's compatibility and thickening performance.

[0061] Compared with Example 4, Example 6 used thickener compositions with different component ratios for parallel verification. The results also showed that the thickener with adjusted component ratios could still achieve good thickening effects in detergents with a completely nonionic system. This experimental result fully demonstrates that within the component ratio range defined by the present invention, the thickener composition can maintain stable and reliable thickening performance regardless of how the ratio of each raw material is adjusted.

[0062] As can be seen from Example 7, in a nonionic detergent system with a total active ingredient content of only 10%, the viscosity of the system can still be adjusted to a high level after adding the thickener composition of the present invention, which fully meets the requirements of daily washing products for texture and dosage control.

[0063] Therefore, this further verifies that the mechanism of action of this thickening system has universal applicability. The thickener in this invention can be adapted to the formulation requirements of detergents of different categories and with different positioning, providing an efficient and stable thickening solution for the formulation development of difficult-to-thicken systems such as low-activity, non-ionic, and sulfonic acid-free systems.

[0064] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made using the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A highly stable thickener, characterized in that, The thickener comprises the following components by mass percentage: (1) Polyethylene glycol difatty acid ester 30~40%; (2) AES 30~40%; (3) 10-20% of fatty alcohol polyoxyethylene ethers with an EO number of 2-5; (4) Preservatives 0-1%; (5) Water balance.

2. The high-stability thickener according to claim 1, characterized in that, The polyethylene glycol difatty acid ester is prepared by esterification of polyethylene glycol and two natural fatty acids with ≥C16 carbon atoms.

3. The high-stability thickener according to claim 2, characterized in that, The polyethylene glycol is selected from one or more polyethylene glycols with an average molecular weight of 400 to 20,000.

4. The high-stability thickener according to claim 1, characterized in that, The fatty alcohol polyoxyethylene ether has a carbon number of C8 to C12.

5. The high-stability thickener according to claim 1, characterized in that, The AES has a carbon number of C8 to C12.

6. The high-stability thickener according to claim 1, 4, or 5, characterized in that, The preservatives include one or more of phenoxyethanol, sodium benzoate, methylisothiazolinone, and methylchloroisothiazolinone.

7. A method for preparing a highly stable thickener as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Mix fatty alcohol polyoxyethylene ether, polyethylene glycol difatty acid ester and water, and heat and stir until the polyethylene glycol difatty acid ester is completely dissolved; Step 2: Add AES and mix well; Step 3: After cooling, add the preservative and stir well.

8. The application of a highly stable thickener as described in any one of claims 1-6 or a highly stable thickener prepared by the preparation method of claim 7 in detergents, characterized in that, include: Depending on the viscosity requirements, add an appropriate amount of thickener to the detergent to be thickened and stir well.

9. The application according to claim 8, characterized in that, The surfactant in the detergent to be thickened does not contain sulfonic acid anionic surfactants.

10. A detergent, characterized in that, It contains a thickener and a surfactant; the thickener is a high-stability thickener as described in any one of claims 1-6 or a high-stability thickener prepared by the preparation method described in claim 7.

11. The detergent according to claim 10, characterized in that, The surfactant does not contain sulfonic acid anionic surfactants.

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