An acidic cleaner composition

Abstract

The application relates to the field of daily chemicals, and discloses an acidic cleaning agent composition which comprises: 0.15-4% of a rheological modifier, 0.01-0.2% of a viscosity stabilizer and water; the rheological modifier at least comprises tallow-based dihydroxyethyl amine oxide and sodium xylene sulfonate and selectively comprises oleylamine polyoxyethylene (2) ether; and the viscosity stabilizer is PEG-150 disodium stearate and / or PEG-120 methyl glucose dioleate. The acidic cleaning agent composition has excellent initial viscosity, can prolong the contact time with a surface to be cleaned, and achieves a better cleaning effect; the acidic cleaning agent composition has excellent viscosity retention in a long shelf period; the acidic cleaning agent composition has a shear thinning property, the viscosity is reduced under high shear conditions, is beneficial to the operation such as tanking in the production process and is easy to squeeze and apply in use.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products, and more particularly to an acidic cleaning agent composition with stable viscosity and shear thinning. Background Technology

[0002] Toilet cleaners are everyday cleaning agents used to clean the surfaces of toilet bowls, toilets, and urinals. Currently, toilet cleaners on the market can be broadly divided into three categories: acidic products, neutral products, and alkaline products. Since the dirt on the surfaces of toilet bowls, toilets, and urinals is mainly stubborn stains such as limescale and urine stains, acidic products are most effective. The surfaces of toilet bowls, toilets, and urinals often have vertical, sloping, or irregular shapes. When low-viscosity liquid cleaners are applied to these surfaces, the cleaner will quickly drip or run off, without sufficient time to interact effectively with the surface dirt, resulting in incomplete cleaning.

[0003] To address the problem of insufficient cleaning caused by the easy loss of liquid detergents, it is necessary to increase the viscosity of the detergent and prolong its residence time on the surfaces of toilet bowls, toilets, and urinals, thereby enhancing the cleaning effect and reducing waste. Currently, the more commonly used solutions are: (1) adding rheology modifiers such as xanthan gum, colloidal silica, and cellulose derivatives to acidic detergents to increase the viscosity of the system; (2) adding surfactant complex systems with synergistic thickening effects to acidic detergents to increase the viscosity of the system, such as amphoteric surfactant systems such as amine oxides, cationic surfactants such as quaternary ammonium salts, and nonionic systems such as fatty amine polyoxyethylene ethers.

[0004] For example, Liang Shuijiao et al. studied the thickening properties of the water-soluble growth promoter sodium octyl sulfonate in organic acid systems. Using citric acid, acidic thickener L-70, and sodium octyl sulfonate as raw materials, they obtained a high-viscosity acidic cleaner by optimizing the formulation. Patent CN 110184140 B discloses a cleaner for bathrooms and sanitary ware. The cleaner's components, by weight, consist of water, acidic thickener, brightener, glycolic acid, oxalic acid, sodium xylenesulfonate, fragrance, sodium chloride, EDTA-2Na, and surfactant. This cleaner improves its stability during storage through the acidic thickener ARLYPON VPC; and enhances its cleaning effect through glycolic acid, oxalic acid, and sodium xylenesulfonate.

[0005] While existing technologies offer several methods to successfully increase the viscosity of acidic cleaning agents, the viscosity of these liquids gradually decreases over their shelf life, affecting their final performance even after prolonged storage. To maintain stable viscosity over the long term, the amount of polymeric or surfactant-based thickeners can be increased to compensate for the viscosity reduction. However, this approach not only significantly increases production costs but also substantially raises the initial viscosity, hindering mixing, filling, and other production operations.

[0006] In summary, if the viscosity stability of existing acidic cleaning agents can be improved during their shelf life without increasing the amount of thickener, it will not only reduce costs but also benefit product manufacturing. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides an acidic cleaning agent composition with stable viscosity and shear-thinning properties. The acidic cleaning agent composition of this invention exhibits excellent initial viscosity, which helps to prolong the contact time between the product and the surface to be cleaned, thereby achieving better cleaning results. The acidic cleaning agent composition of this invention also exhibits excellent viscosity retention over a long shelf life. Furthermore, the acidic cleaning agent composition of this invention possesses shear-thinning characteristics, which allows it to display higher viscosity under static or low-shear conditions, while the viscosity decreases under high-shear conditions. This facilitates filling and other operations during production and makes it easy to extrude and apply during use.

[0008] The specific technical solution of the present invention is as follows: an acidic cleaning agent composition with stable viscosity and shear thinning, comprising the following components by mass percentage: rheology modifier 0.15-4%, viscosity stabilizer 0.01-0.2%, and water.

[0009] The rheology modifier includes at least tallow-based dihydroxyethylamine oxide and sodium xylenesulfonate, and optionally includes oleylamine polyoxyethylene (2) ether; the viscosity stabilizer is one or both of PEG-150 distearate and PEG-120 methyl glucoside dioleate.

[0010] In this invention, acid is used as the main cleaning component, which breaks down and removes dirt through a chemical reaction, thereby giving the acidic detergent excellent cleaning effect. Based on this, the combination of tallow-based dihydroxyethylamine oxide, oleylamine polyoxyethylene (2) ether, and sodium xylenesulfonate is mainly used to adjust viscosity, giving the acidic detergent composition a better initial viscosity and imparting shear-thinning properties. In the prior art, tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether are usually used as acidic thickeners. Although they can adjust viscosity when used alone or in combination, the dosage is high and the system does not have shear-thinning properties. Sodium xylenesulfonate is usually used as a water-soluble growth promoter in detergents to increase the solubility of nonionic surfactants and is generally not used alone. This invention discovers that by compounding tallow-based dihydroxyethylamine oxide, oleylamine polyoxyethylene (2) ether, and sodium xylenesulfonate in a certain proportion, not only can the initial viscosity of the system of this invention be increased with a lower amount of tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether, but it can also impart shear-thinning properties to the acidic cleaning agent composition. This property allows the acidic cleaning agent composition to exhibit very high viscosity under static or low shear conditions, thus providing effective surface adhesion and runoff resistance when used as a sanitary ware cleaner, prolonging the contact time with the surface to be cleaned, thereby achieving a better cleaning effect; under high shear conditions, the viscosity of the acidic cleaning agent composition decreases, making it easier to fill and other operations during production and easier to extrude and apply during use.

[0011] On the other hand, PEG-150 distearate and PEG-120 methylglucose dioleate, as high-molecular-weight nonionic surfactants, are currently mainly used as thickeners or emulsifiers in cosmetics. This invention has accidentally discovered that specific amounts of PEG-150 distearate and PEG-120 methylglucose dioleate further stabilize the viscosity of the rheology modifier of this invention, allowing the acidic detergent composition to maintain satisfactory viscosity retention over a longer shelf life. The mechanism is likely that PEG-150 distearate and PEG-120 methylglucose dioleate can form hydrogen bonds with water, encapsulating a large amount of water within the molecule, reducing the content of free water in the solution, thereby hindering the interaction between micelles formed by the rheology modifier of this invention, thus stabilizing the system viscosity.

[0012] Preferably, the rheology modifier is composed of 0.1-3% tallow-based dihydroxyethyl amine oxide, 0-0.5% oleylamine polyoxyethylene (2) ether, and 0.05-1% sodium xylenesulfonate, and the ratio of the total mass of tallow-based dihydroxyethyl amine oxide and oleylamine polyoxyethylene (2) ether to sodium xylenesulfonate is 2-15:1.

[0013] In the system of this invention, the amount of each substance and the proportion between them need to be strictly controlled, specifically:

[0014] The rheology modifier used in this invention utilizes sodium xylenesulfonate to alter the micelle morphology formed by tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether, causing the surfactant micelles to change from spherical to rod-shaped, thereby generating viscosity. Changes in micelle morphology significantly affect the viscosity of the system. PEG-150 distearate and PEG-120 methyl glucoside dioleate are high-molecular-weight nonionic surfactants that can form hydrogen bonds with water, thereby encapsulating a large amount of water and reducing free water in the solution. This increases the resistance to movement between polymers and, on the other hand, the long hydrophilic chains extend and insert into the micelles, hindering the movement of surfactant micelles and stabilizing viscosity. However, if the amount of high-molecular-weight nonionic surfactant in this system is too high, the large amount of free water being captured will cause a sharp decrease in the solubility of other surfactants, resulting in precipitation and turbidity. Because tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether are cationic under acidic conditions, and sodium xylenesulfonate has a large anionic group, sodium xylenesulfonate promotes the formation of rod-shaped micelles of tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether through electrostatic interaction. In a certain amount of tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether solution, the more sodium xylenesulfonate is added, the stronger the electrostatic interaction between them, and the easier it is to form rod-shaped micelles and increase viscosity. If the amount of sodium xylenesulfonate reaches a certain level, it will compress the double layer thickness on the surface of the micelles, resulting in a decrease in viscosity. Further increases will cause phase separation due to the decrease in micelle solubility, forming a turbid system. It can be further understood that after tallow-based dihydroxyethylamine oxide, oleylamine polyoxyethylene (2) ether, and sodium xylenesulfonate form rod-shaped micelles, reducing the water content of the system, i.e. increasing the amount of tallow-based dihydroxyethylamine oxide, oleylamine polyoxyethylene (2) ether, and sodium xylenesulfonate, may lead to insufficient solubility and phase separation, resulting in turbidity.

[0015] Rod-shaped micelles, also known as worm-like, linear, or rod-shaped macromolecules, can intertwine to form a flexible three-dimensional network structure, similar to the state of polymers in aqueous solutions, exhibiting a certain degree of viscoelasticity. At low shear rates, the viscosity of the system remains essentially constant. When the shear rate reaches a certain value, the interlocking between the scattered worm-shaped micelles decreases, causing them to roll and rotate, shrinking into clusters, and the viscosity begins to decrease, i.e., shear thinning occurs. Tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether form spherical micelles in aqueous solution, exhibiting low viscosity. Upon addition of sodium xylenesulfonate, due to the strong electrostatic interaction, the spherical micelles rapidly transform into worm-shaped micelles, thus exhibiting shear thinning properties. Sodium xylenesulfonate can theoretically react with any positively charged surfactant to form worm-like micelles. However, since the properties of each positively charged surfactant are different, the amount of sodium xylenesulfonate added needs to be controlled for a specific content of positively charged surfactant to ensure an appropriate electrostatic force between them. In other words, if the ratio of positively charged surfactant to sodium xylenesulfonate is too high or too low, worm-like micelle aggregates with shear-thinning properties cannot be formed. This invention has found that when tallow-based dihydroxyethylamine oxide, oleylamine polyoxyethylene (2) ether, and sodium xylenesulfonate form worm-like micelles, the amounts of all three are relatively low, resulting in good economic efficiency.

[0016] Preferably, the pH of the acidic cleaning agent composition is 0.5-3.5.

[0017] The cleaning agent composition of this invention is an acidic product. Since the dirt on the surface of toilet bowls, toilets, urinals, etc. is mainly stubborn stains such as limescale and urine stains, acidic products have the best cleaning effect.

[0018] Preferably, the acidic cleaning agent composition further includes one or more of the following: acid, antioxidant, bactericide, corrosion inhibitor, chelating agent, solubilizer, fragrance, fragrance solubilizer, and pigment.

[0019] Preferably, the acid is one or more selected from hydrochloric acid, methanesulfonic acid, aminosulfonic acid, oxalic acid, citric acid, and tartaric acid. The content is 0.1-40%, preferably 0.5-10%. The preferred range of the acid depends on the final pH of the acidic cleaning agent composition; the amount of acid added typically results in a final pH of 0.5-3.5 for the acidic cleaning agent composition.

[0020] Preferably, the antioxidant is one or more of 2,6-di-tert-butyl-4-methylphenol (BHT), tert-butyl-4-hydroxyanisole (BHA), tert-butylhydroquinone (TBHQ), and tea polyphenols; the content is 0.001-1%.

[0021] Antioxidants can prevent the oxidation of acidic detergent components by reducing the oxygen content in the acidic detergent composition system, which helps to improve the stability of the acidic detergent composition.

[0022] Preferably, the bactericide is one or more of hexadecyltrimethylammonium chloride, dodecyldimethylbenzylammonium chloride, and disedecyldimethylammonium chloride; the content is 0.1-5%.

[0023] Bactericides can impart bactericidal properties to acidic cleaning agent compositions.

[0024] Preferably, the corrosion inhibitor is one or more of thiourea, hexamethylenetetramine, and benzotriazole, with a content of 0.01-0.5%.

[0025] Corrosion inhibitors can reduce the corrosion of ceramic and metal surfaces by acidic cleaning agent compositions, which helps protect hard surfaces such as toilet bowls, urinals, and toilets, and extends their service life.

[0026] Preferably, the chelating agent is tetrasodium glutamate diacetate. N,N One or more of the following: trisodium di(carboxymethyl)alanine and tetrasodium ethylenediaminetetraacetate; the content is 0.1-1%.

[0027] Chelating agents have the function of chelating calcium and magnesium ions. After the acidic cleaning agent composition breaks down the dirt, the addition of chelating agents can prevent dirt from depositing.

[0028] Preferably, the fragrance and pigment are general ingredients and the types are not limited; the content of fragrance is 0.01-1%; and the content of pigment is 0.001-0.1%.

[0029] Preferably, the fragrance solubilizer is one of fatty alcohol polyoxyethylene (9) ether, Tween 20, or hydrogenated castor oil EO40; its content is 1-5 times that of the fragrance.

[0030] Fragrance solubilizers have the function of solubilizing fragrances.

[0031] Compared with the prior art, the present invention has the following technical effects:

[0032] (1) In this invention, after compounding tallow-based dihydroxyethylamine oxide, oleylamine polyoxyethylene (2) ether and sodium xylenesulfonate in a certain proportion, not only can the initial viscosity of the system of this invention be increased with a lower amount of tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether, but also can give the acidic cleaning agent composition shear-thinning characteristics. This makes the acidic cleaning agent composition exhibit higher viscosity under static or low shear conditions, which is beneficial to increase the contact time between the product and the surface to be cleaned during use, thereby achieving a better cleaning effect. Under high shear conditions, the viscosity of the acidic cleaning agent composition is reduced, which makes it easier to fill and other operations during production and easier to extrude and apply during use.

[0033] (2) The system of the present invention contains a specific amount of PEG-150 distearate and PEG-120 methyl glucoside, which can further stabilize the viscosity, so that the acidic cleaning agent composition still has satisfactory viscosity retention over a long shelf life. Detailed Implementation

[0034] The present invention will be further described below with reference to embodiments.

[0035] General Implementation Examples

[0036] A viscosity-stable and shear-thinning acidic cleaning agent composition with a pH of 0.5-3.5 comprises the following components by mass percentage: 0.15-4% rheology modifier, 0.01-0.2% viscosity stabilizer, and water.

[0037] The rheology modifier consists of 0.1-3% tallow-based dihydroxyethyl amine oxide, 0-0.5% oleylamine polyoxyethylene (2) ether, and 0.05-1% sodium xylenesulfonate, with the total mass of tallow-based dihydroxyethyl amine oxide and oleylamine polyoxyethylene (2) ether in a ratio of 2-15:1 to sodium xylenesulfonate.

[0038] The viscosity stabilizer is one or both of PEG-150 distearate and PEG-120 methyl glucoside.

[0039] Preferably, the acidic cleaning agent composition may also selectively include one or more of the following: acid, antioxidant, bactericide, corrosion inhibitor, chelating agent, solubilizer, fragrance, fragrance solubilizer, and pigment.

[0040] The acid is one or more selected from hydrochloric acid, methanesulfonic acid, aminosulfonic acid, oxalic acid, citric acid, and tartaric acid. Its content is 0.1-40%, preferably 0.5-10%.

[0041] The antioxidant is one or more of 2,6-di-tert-butyl-4-methylphenol (BHT), tert-butyl-4-hydroxyanisole (BHA), tert-butylhydroquinone (TBHQ), and tea polyphenols; the content is 0.001-1%.

[0042] The bactericide is one or more of hexadecyltrimethylammonium chloride, dodecyldimethylbenzylammonium chloride, and disedecyldimethylammonium chloride; the content is 0.1-5%.

[0043] The corrosion inhibitor is one or more of thiourea, hexamethylenetetramine, and benzotriazole; the content is 0.01-0.5%.

[0044] The chelating agent is tetrasodium glutamate diacetate. N,N One or more of the following: trisodium di(carboxymethyl)alanine and tetrasodium ethylenediaminetetraacetate; the content is 0.1-1%.

[0045] Fragrance and color are common ingredients, and the types are not limited; the content of fragrance is 0.01-1%; the content of color is 0.001-0.1%.

[0046] The fragrance solubilizer is one of fatty alcohol polyoxyethylene (9) ether, Tween 20, or hydrogenated castor oil EO40; its content is 1-5 times that of the fragrance. Specific Implementation

[0048] Without further detailed explanation, it is believed that those skilled in the art can fully utilize the present invention based on the above description. The following embodiments are intended to further illustrate and demonstrate specific implementations within the scope of the present invention. Therefore, the embodiments should be understood as being used only to illustrate the present invention in more detail, and not to limit the scope of the present invention in any way. Unless otherwise specified, the raw materials used in the embodiments can be obtained from conventional commercial sources. In the embodiments, all contents are weight percentages, and the contents of all components are based on the content of the active substance.

[0049] Test methods

[0050] (1) Stability test

[0051] High temperature stability: After being placed at 50±2℃ for 30 days, the liquid should be observed immediately upon removal. It should appear as a uniform and transparent liquid with no layering or sedimentation, and the odor should not change significantly.

[0052] Low temperature stability: After being placed at 0±2℃ for 30 days, it returns to room temperature and becomes a uniform and transparent liquid without layering or precipitation, and the odor does not change significantly.

[0053] Freeze-thaw stability: After 5 freezing cycles at -18℃ / room temperature, the liquid returns to room temperature and is a uniform, transparent liquid with no layering or sedimentation, and no significant change in odor.

[0054] Passing the stability test indicates that the composition formulation has good appearance stability.

[0055] (2) Viscosity test

[0056] According to the method specified in GB / T 15357-2014 "Surfactants and Detergents - Determination of Viscosity and Flow Properties of Liquid Products by Rotation Viscometer", the viscosity of acidic detergent at 25℃ was measured using an NDJ-1 viscometer and a No. 2 rotor at rotation speeds of 30 rpm and 60 rpm, respectively.

[0057] The viscosity of the high-temperature stable sample and the low-temperature stable sample were measured simultaneously during the stability test.

[0058] (3) pH test

[0059] The pH of a 1% aqueous solution of an acidic cleaning agent at 25°C was tested according to the method specified in GB / T 6368-2008 "Determination of pH of Aqueous Solutions of Surfactants - Potentiometric Method".

[0060] The pH of the high-temperature stable sample and the low-temperature stable sample were measured simultaneously during the stability test.

[0061] Examples 1-6

[0062] The raw material composition ratios of the acidic cleaning agent compositions in Examples 1-6 are shown in Table 1.

[0063] Table 1

[0064]

[0065] The test results of stability, viscosity and pH of the compositions in Examples 1-6 are shown in Table 2.

[0066] Table 2

[0067]

[0068] As can be seen from the data in Table 2, the compositions of Examples 1-6 have good appearance stability, and all systems exhibit shear thinning. After high and low temperature tests, the viscosity and pH of the systems are well maintained.

[0069] Examples 7-8, Comparative Examples 1-4

[0070] The raw material composition ratios of the acidic cleaning agent compositions in Examples 7-8 and Comparative Examples 1-4 are shown in Table 3.

[0071] Table 3

[0072]

[0073] The test results of stability, viscosity and pH of Examples 7-8 and Comparative Examples 1-4 are shown in Table 4.

[0074] Table 4

[0075]

[0076] As can be seen from the data in Table 4, the compositions of Examples 7 and 8 exhibit good appearance stability and shear thinning. After high and low temperature testing, the viscosity and pH of the system remained good. Comparative Examples 1 and 3, compared to Examples 7 and 8 respectively, differ in that they do not contain sodium xylenesulfonate, and the amounts of tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether added are much higher than in Examples 7 and 8. The comparison shows that using tallow-based dihydroxyethylamine oxide alone or in combination with oleylamine polyoxyethylene (2) ether, at higher dosages, the system did not achieve satisfactory viscosity. Although the stability was good, shear thinning was not observed. Comparative Examples 2 and 4, compared to Examples 7 and 8 respectively, differ in that they do not contain tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether. The viscosity of the system is lower, failing to achieve satisfactory results; and they also do not exhibit shear thinning characteristics.

[0077] Examples 9-14

[0078] The raw material composition ratios of the acidic cleaning agent compositions in Examples 9-14 are shown in Table 5.

[0079] Table 5

[0080]

[0081] The test results for stability, viscosity and pH of Examples 9-14 are shown in Table 6.

[0082] Table 6

[0083]

[0084] As shown in Table 6, Examples 10-14 exhibited good appearance stability, with all systems showing shear thinning. After high and low temperature testing, the systems maintained good viscosity and pH. In Example 9, the ratio of tallow-based dihydroxyethylamine oxide to sodium xylenesulfonate was less than the critical point of 2:1, resulting in lower initial viscosity and poorer appearance stability. In Example 14, the ratio of tallow-based dihydroxyethylamine oxide to sodium xylenesulfonate was greater than the critical point of 15:1, resulting in lower initial viscosity. Although it exhibited good appearance stability, it lacked shear thinning properties and failed to achieve satisfactory wall adhesion.

[0085] Examples 15-19, Comparative Examples 5-6

[0086] The raw material composition ratios of the acidic cleaning agent compositions in Examples 15-19 and Comparative Examples 5-6 are shown in Table 7.

[0087] Table 7

[0088]

[0089] The test results of stability, viscosity and pH of Examples 15-19 and Comparative Examples 5-6 are shown in Table 8.

[0090] Table 8

[0091]

[0092] As can be seen from the data in Table 8, Examples 15-19 exhibited good appearance stability, with all systems showing shear thinning. After high and low temperature testing, the viscosity and pH of the systems remained relatively stable. Comparative Example 5, which did not contain a viscosity stabilizer, still exhibited shear thinning, but the viscosity of the sample decreased significantly under high temperature conditions, and the shear thinning phenomenon ceased after the viscosity decreased. Comparative Example 6 had a viscosity stabilizer content of 0.3%, indicating that the appearance stability of the sample was poor when it exceeded the preferred range of this invention.

[0093] Unless otherwise specified, the raw materials and equipment used in this invention are all commonly used in the field; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0094] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An acidic cleaning agent composition, characterized in that: The components include the following components by mass percentage: rheology modifier 0.15-4%, viscosity stabilizer 0.01-0.2%, and water; The rheology modifier consists of 0.1-3% tallow-based dihydroxyethylamine oxide by mass of the composition, 0-0.5% oleylamine polyoxyethylene (2) ether by mass of the composition, and 0.05-1% sodium xylenesulfonate by mass of the composition; The ratio of the total mass of tallow-based dihydroxyethylamine oxide and oleylamine polyoxyethylene (2) ether to sodium xylenesulfonate is 2-15:1; The viscosity stabilizer is one or both of PEG-150 distearate and PEG-120 methyl glucoside.

2. The acidic cleaning agent composition according to claim 1, characterized in that: The pH of the acidic cleaning agent composition is 0.5-3.

5.

3. The acidic cleaning agent composition according to claim 1, characterized in that: The acidic cleaning agent composition further includes one or more of the following: acid, antioxidant, bactericide, corrosion inhibitor, chelating agent, solubilizer, fragrance, fragrance solubilizer, and pigment.

4. The acidic cleaning agent composition according to claim 3, characterized in that: The acid is one or more of hydrochloric acid, methanesulfonic acid, aminosulfonic acid, oxalic acid, citric acid, and tartaric acid.

5. The acidic cleaning agent composition according to claim 3, characterized in that: The antioxidant is one or more of 2,6-di-tert-butyl-4-methylphenol, tert-butyl-4-hydroxyanisole, tert-butylhydroquinone, and tea polyphenols. The bactericide is one or more of hexadecyltrimethylammonium chloride, dodecyldimethylbenzylammonium chloride, and decyldimethylammonium chloride; The corrosion inhibitor is one or more of thiourea, hexamethylenetetramine, and benzotriazole; The chelating agent is tetrasodium glutamate diacetate. N, N One or more of the following: trisodium di(carboxymethyl)alanine and tetrasodium ethylenediaminetetraacetate.

6. The acidic cleaning agent composition according to claim 3 or 5, characterized in that: The antioxidant content is 0.001-1%; The content of the bactericide is 0.1-5%; The content of the corrosion inhibitor is 0.01-0.5%; The content of the chelating agent is 0.1-1%.

7. The acidic cleaning agent composition according to claim 3, characterized in that: The content of the fragrance is 0.01-1%.

8. The acidic cleaning agent composition according to claim 3, characterized in that: The content of the pigment is 0.001-0.1%.

9. The acidic cleaning agent composition according to claim 3, characterized in that: The content of the fragrance solubilizer is 1-5 times that of the fragrance.

10. The acidic cleaning agent composition according to claim 3 or 9, characterized in that: The fragrance solubilizer is one of fatty alcohol polyoxyethylene (9) ether and Tween 20.

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