An amino acid composition for selective cleaning, its products and preparation methods

Abstract

This application relates to the technical field of surfactants, and specifically relates to an amino acid composition for selective cleaning, its products and preparation methods. The amino acid composition of this application, by weight parts, comprises 20 to 40 parts of a first surfactant and 15 to 25 parts of a second surfactant; the first surfactant includes potassium cocoyl glycinate powder, and optionally also includes sodium cocoyl glycinate powder, and the potassium cocoyl glycinate powder accounts for at least 85% of the total weight of the first surfactant; the second surfactant includes potassium cocoyl glycinate solution, sodium cocoyl aminopropionate, sulfonate surfactant and zwitterionic surfactant in a weight ratio of 10:(5 to 10):(1 to 5):(5 to 10). The amino acid composition for selective cleaning of this application pays more attention to the selective cleaning effect on the skin, and does not fail when acting simultaneously with other functional cleaning ingredients, and has the effect of multiple synergistic moisturization.

Description

Technical Field

[0001] This application relates to the technical field of surfactants, and specifically relates to an amino acid composition for selective cleaning, its products and preparation methods. The amino acid composition products for selective cleaning include an amino acid composition for skin cleaning and a skin cleanser. Background Art

[0002] With the improvement of consumers' requirements for personal care products, facial cleansing products are no longer limited to basic cleaning functions, but are developing towards a more diversified and personalized direction. Modern consumers expect facial cleansing products to not only ensure cleaning power, but also take into account the gentle care of the skin and provide a more comfortable and pleasant user experience. In such a market trend, dual-tube facial cleansers have become an ideal choice to meet these needs with their unique design and formulation advantages.

[0003] A dual-tube facial cleanser is an innovative skincare product that separately packages two facial cleansing ingredients with different functions in two independent tubes, allowing users to choose different facial cleansing formulas according to their skin conditions and needs. This design not only improves the flexibility and personalization of the product, but also helps to maintain the stability and effectiveness of each formula.

[0004] In the design of dual-tube facial cleansers, usually one tube focuses on gentle cleaning, while the other tube focuses on special functions such as moisturizing, oil control or deep cleaning. Such a design enables the product to better meet the needs of different skin types and different usage scenarios. However, in actual applications, this design does not necessarily achieve the ideal "double enhancement" effect, but may instead lead to "double failure". This may be because the formulas in different tubes are stable within their respective systems, but once mixed, they may lose their functional keys and at the same time affect the stability of their respective components.

[0005] For example, the gentle cleaning tube may contain a relatively high proportion of amino acid surfactants. These ingredients are favored for their mildness and low irritation, and can effectively remove dirt and excess oil on the skin surface while maintaining the skin's natural water-oil balance. The moisturizing or oil control tube may contain specific moisturizing ingredients or ingredients that regulate sebum secretion, such as polysaccharides, cationic conditioners or ester components. These ingredients help to supplement the moisture and nutrients required by the skin during facial cleansing, or control the excessive secretion of sebum, keeping the skin fresh and comfortable. However, when the two are mixed, the high-concentration moisturizing ingredients may be emulsified or encapsulated by excessive surfactants, thus reducing their efficacy. Summary of the Invention

[0006] Based on this, one or more embodiments of the present application provide an amino acid composition for selective cleansing, a product thereof, and a preparation method thereof. The amino acid composition for selective cleansing of the present application focuses more on the selective cleansing effect on the skin and the overall compatibility with other functional ingredients, such as highly moisturizing active ingredients, to impart multiple benefits to the skin after cleansing, including a less tight feeling, high moisturizing of the skin, and selective removal of skin oil.

[0007] The technical solution of this application includes the following:

[0008] An amino acid composition comprising, by weight, 20 to 40 parts of a first surfactant and 15 to 25 parts of a second surfactant;

[0009] The first surfactant includes potassium cocoyl glycinate powder, and optionally also includes sodium cocoyl glycinate powder, and the potassium cocoyl glycinate powder accounts for at least 85% of the total weight of the first surfactant;

[0010] The second surfactant comprises potassium cocoyl glycinate, sodium cocoylaminopropionate, sulfonate surfactant and zwitterionic surfactant in a weight ratio of 10:(5-10):(1-8):(5-10).

[0011] An amino acid composition for skin cleansing, characterized by comprising the amino acid composition for selective cleansing according to any one of claims 1 to 5 and a highly moisturizing amino acid composition;

[0012] The highly moisturizing amino acid composition comprises, by weight, 20 to 40 parts of a third surfactant and 15 to 25 parts of a fourth surfactant;

[0013] The third surfactant comprises powdered cocoyl glycinate and liquid cocoyl glycinate in a weight ratio of (0.8-1): (1-1.2); preferably, the mass concentration of the liquid cocoyl glycinate is 20%-40%;

[0014] The fourth surfactant is an auxiliary surfactant, including at least one of anionic surfactants, cationic conditioning agents, amphoteric surfactants and nonionic surfactants.

[0015] A skin cleanser comprising a first agent and a second agent that exist independently;

[0016] The first agent includes: a first polyol, a first thickener, a first surfactant, a second surfactant, a first pH adjuster, a first preservative, a second thickener, a fifth surfactant, a first moisturizer, and optionally a first fragrance additive;

[0017] The second agent comprises: a second polyol, a third thickening agent, a third surfactant, a fourth surfactant, a sixth surfactant, a second pH regulator, a second preservative, a fourth thickening agent, and optionally at least one of minerals, active ingredients, and a second fragrance additive;

[0018] Wherein, the definitions of the first surfactant and the second surfactant are the same as the relevant definitions in any of the above technical solutions; the definitions of the third surfactant and the fourth surfactant are the same as the relevant definitions in any of the above technical solutions; the fifth surfactant and the sixth surfactant are each independently selected from at least one of polyquaternium-7, polyquaternium-39, and polyquaternium-43.

[0019] A method for preparing the skin cleanser described above, comprising the following steps:

[0020] S100: Prepare the raw materials for preparing the first agent and the second agent according to the formula of the skin cleanser, and perform phase classification, wherein:

[0021] The phases for preparing the first agent include:

[0022] Phase A1: containing the first polyol, the first thickening agent, and the first surfactant;

[0023] Phase B1: containing the second surfactant;

[0024] Phase C1: containing the first pH regulator;

[0025] Phase D1: containing the first preservative;

[0026] Phase E1: containing the second thickening agent;

[0027] Phase F1: containing the fifth surfactant;

[0028] Phase G1: containing the first humectant;

[0029] The phases for preparing the second agent include:

[0030] Phase A2: containing the second polyol and the third thickening agent;

[0031] Phase B2: containing the third surfactant and the fourth surfactant;

[0032] Phase C2: containing the sixth surfactant;

[0033] Phase D2: containing the second pH regulator;

[0034] Phase E2: containing the second preservative;

[0035] F2 phase: containing the fourth thickening agent;

[0036] S200: To prepare the first agent, including:

[0037] Provide stirring force to mix the components of the A1 phase evenly, then add the B1 phase and mix, then raise the temperature to 85°C - 90°C, add the C1 phase and the D1 phase and mix, then adjust the stirring speed to 3000 rpm - 20000 rpm, and add the E1 phase, the F1 phase, and the G1 phase and mix;

[0038] S300: To prepare the second agent, including:

[0039] Provide stirring force to mix the components of the A2 phase evenly, then add the B2 phase and mix, then raise the temperature to 85°C - 90°C, add the C2 phase, the D2 phase, and the E2 phase and mix, then adjust the stirring speed to 3000 rpm - 20000 rpm, and add the F2 phase and mix.

[0040] In this application, by reasonably matching cocoyl glycinate with a specific carbon chain ratio, other different types of amino acid salts, and co-surfactants, an amino acid composition with selective cleaning effect is formed, which has a selective cleaning effect on sebum on the skin surface, can remove oxidized squalene on the skin surface while retaining the beneficial substance cholesterol on the skin. Therefore, the product has good cleaning effect and good nourishing and moisturizing effect at the same time.

[0041] The amino acid composition for skin cleaning in this application includes an amino acid composition for selective cleaning and a high-moisture amino acid composition, so that selective cleaning can be carried out without affecting the moisturizing effect. Moreover, the two compositions do not react with each other, have good compatibility, and can play an additive moisturizing and synergistic effect when used together, with better stability and flexibility; and the ratio between the surfactants endows the skin surface with denser foam particles during cleaning, and can better achieve selective cleaning.

[0042] The skin cleanser in this application uses the above amino acid composition as the main surfactant, and also combines some necessary components required for the cleanser and optional flexible added functional ingredients. These components and the surfactant of the amino acid composition and their mutual compatibility are very good, and they do not react with each other or hinder the overall selective cleaning and moisturizing effects. When used, the bubbles are dense, with a very good skin feel, and after cleaning, the oil is selectively removed, the skin is not tight, and it has a moisturizing effect, achieving mild cleaning and good cleaning effect. At the same time, the synergistic effect between the components in the formula plays a role of multiple moisturizing, and better maintains the moist state of the skin. Description of the Drawings

[0043] Figure 1 The comparative results of the foaming tests for Examples 1-5 and Comparative Examples 1-5 of the present application.

[0044] Figure 2 The particle size distribution diagrams obtained from the foam particle size tests for Examples 1 and 3 and Comparative Examples 1 and 3 of the present application. Detailed implementation manners

[0045] The present application will be further described below in conjunction with the implementation manners and examples. It should be understood that these examples are only used to illustrate the present application and not to limit the scope of the present application. In addition, it should be understood that after reading the content taught in the present application, those skilled in the art can make various changes or modifications to the present application, and these equivalent forms also fall within the protection scope of the appended claims of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0047] Terms:

[0048] Unless otherwise stated or there is a contradiction, the terms or phrases used herein have the following meanings:

[0049] The selection range of the terms "and / or", "or / and", and "and / or" used herein includes any one of two or more related listed items, and also includes any and all combinations of the related listed items. The said any and all combinations include combinations of any two related listed items, any more related listed items, or all related listed items. It should be noted that when connecting at least three items with at least two conjunctions selected from "and / or", "or / and", and "and / or", it should be understood that in the present application, this technical solution undoubtedly includes the technical solution connected by "logical AND", and also undoubtedly includes the technical solution connected by "logical OR". For example, "A and / or B" includes three parallel solutions: A, B, and A + B.

[0050] In the present application, both "or any combination thereof" and "at least one" refer to including one or more of the components listed above. For example, when described as "the mineral is selected from: mineral mud, volcanic mud or any combination thereof", it means that the mineral can be mineral mud, volcanic mud, or a mixture of mineral mud and volcanic mud. Another example, when described as "the mineral is selected from: at least one of mineral mud and volcanic mud", it means that the mineral can be mineral mud, volcanic mud, or a mixture of mineral mud and volcanic mud.

[0051] In this application, terms such as "further", "even further", "especially", etc. are used for descriptive purposes to indicate differences in content, but should not be construed as limiting the scope of protection of this application.

[0052] In this application, among the technical features described in an open-ended manner, it includes a closed technical solution composed of the listed features, as well as an open technical solution containing the listed features.

[0053] In this application, regarding numerical intervals (i.e., numerical ranges), unless otherwise specified, the optional numerical values are considered continuous within the above numerical intervals, and include the two numerical endpoints of this numerical range (i.e., the minimum value and the maximum value), as well as each numerical value between these two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to integers within the numerical interval, it includes the two endpoint integers of this numerical range, as well as each integer between the two endpoints. In addition, when multiple ranges are provided to describe features or characteristics, these ranges can be combined. In other words, unless otherwise specified, the ranges disclosed herein should be understood to include any and all sub-ranges subsumed therein.

[0054] In this application, weight can be mass units well-known in the chemical industry such as μg, mg, g, kg, etc.

[0055] In this text, cocoyl glycinate salts (such as potassium cocoyl glycinate and sodium cocoyl glycinate, etc.) are mixed amino acid surfactants. Cocoyl amino acid salts are prepared from natural amino acids and coconut fatty acids as raw materials. Therefore, depending on the preparation process or the purity of the raw materials, they can be mixtures with different carbon chain compositions. Cocoyl glycinate salts mainly contain components such as octanoyl amino acid / salt, decanoyl amino acid / salt, lauroyl amino acid / salt, myristoyl amino acid / salt, palmitoyl amino acid / salt, stearoyl amino acid / salt, etc., among which the lauroyl amino acid / salt has the highest content. Different carbon chain compositions will significantly affect their surface activity.

[0056] In this text, potassium cocoyl glycinate powder and sodium cocoyl glycinate powder are respectively independently high-purity powdered amino acids purified by three-step salting-out recrystallization. Their carbon chain distribution is mainly 12 - 14 carbons. Among them, by mole number, 12-carbon atoms account for 3% - 28%, 14-carbon atoms account for 70% - 95%, and 16 - 18 carbon atoms are 0.1% - 2%. Potassium cocoyl glycinate solution and sodium cocoyl glycinate solution are respectively independently liquid amino acids prepared by green synthesis of natural oil soap base. Their carbon chain distribution is that the content of 8 - 10 carbons is 1% - 20%, the distribution of 12 - 14 carbons is 70% - 90%, and the distribution of 16 - 18 carbons is 2% - 10%.

[0057] Facial cleansers with amino acid surfactants as the main surfactants (also known as amino acid facial cleansers) usually have the advantages of being mild and non-irritating, protecting the skin barrier, and being suitable for all skin types. However, due to the mild nature of amino acid facial cleansers, their cleaning power may not be as strong as that of some traditional facial cleansers. Moreover, amino acid facial cleansers may have the problem of slow foaming, which affects the user experience.

[0058] To address the above problems, we studied the composition of traditional crystalline amino acid facial cleansers and found the following issues: Since N-acylglycine needs to be hydrochlorinated to form N-acylglycine and then cooled to form crystals, under weakly acidic conditions, the surfactant cannot exert its maximum efficacy, resulting in poor foaming power of amino acids. Also, in order to better form crystals, sodium cocoyl glycinate is usually used as the main surfactant, but the foam of sodium N-acylglycinate is relatively fluffy and coarse, and it is difficult to prepare a facial cleansing product with delicate and rich foam, which seriously affects the user experience. Potassium N-acylglycinate is difficult to thicken, and preparing a paste-like product requires excessive acidification. Therefore, under weakly acidic conditions, its foaming power is still limited. It was also found that in most facial cleansing products, when maintaining good foam texture and excellent cleaning power, due to the cleaning effect of high-concentration surfactants, through penetration and emulsification, etc., the sebum is over-cleaned and the skin barrier is disturbed, resulting in skin irritation. At the same time, most moisturizing raw materials have good effects in retention-type products, but often have unsatisfactory effects in products with better cleaning power, and the good cleaning power will wash away the moisturizer together. In summary, it is difficult for traditional amino acid facial cleansers to balance the cleaning power, mildness, and moisturizing properties of the skin.

[0059] In this application, by reasonably combining potassium cocoyl glycinate with a specific carbon chain ratio, different types of amino acid salts, and co-surfactants to form an amino acid composition, it has a selective cleaning effect on the sebum on the skin surface. It can remove oxidized squalene on the skin surface while retaining the beneficial substance cholesterol in the skin. Therefore, the product has good cleaning effects and good nourishing and moisturizing effects at the same time.

[0060] The amino acid composition of an embodiment of this application, by weight, includes 20-40 parts of a first surfactant and 15-25 parts of a second surfactant;

[0061] The first surfactant includes potassium cocoyl glycinate powder, and optionally also includes sodium cocoyl glycinate powder, and the proportion of potassium cocoyl glycinate powder in the total weight of the first surfactant is ≥85%;

[0062] The second surfactant includes potassium cocoyl glycinate solution, sodium cocoyl aminopropionate, sulfonate surfactants, and zwitterionic surfactants with a weight ratio of 10:(5-10):(1-8):(5-10).

[0063] High-ratio amino acid surfactants (the weight ratio of amino acid surfactants to all surfactants) and high-concentration amino acid surfactants are crystallized together to form a unique flaky crystalline appearance, which has the excellent effects of easy foaming, easy rinsing, refreshing after flushing, and no false slipperiness.

[0064] Preferably, the first surfactant comprises potassium cocoyl glycinate powder and sodium cocoyl glycinate powder in a weight ratio of (20-28): (1-5). The specific ratio of potassium cocoyl glycinate and sodium cocoyl glycinate compounding maintains a good paste shape, a milky and delicate pearlescent texture, and a soft and easy-to-spread texture. Furthermore, the compounding of multiple amino acids and mild surfactants creates dense and delicate ultra-micron bubbles, reducing the concentration of surfactants in contact with the skin, reducing the penetration of free surfactants into the skin, and reducing the risk of penetration into the eyes during cleansing, making the product more gentle and low-irritation.

[0065] In one embodiment, the sulfonate surfactant includes at least one of disodium lauryl sulfosuccinate, sodium methyl cocoyl taurate, sodium methyl cocoyl taurate, sodium methyl lauroyl taurate, and sodium methyl lauroyl taurate.

[0066] In one embodiment, the sulfonate surfactant includes disodium lauryl sulfosuccinate and sodium methyl cocoyl taurate in a weight ratio of (0.5-5):(1-8).

[0067] In one embodiment, the zwitterionic surfactant includes at least one of sodium cocoamphoacetate, disodium cocoamphodiacetate, and sodium lauroamphoacetate.

[0068] The present application also provides an amino acid composition for skin cleansing, comprising the amino acid composition for selective cleansing and the highly moisturizing amino acid composition described in any of the above technical solutions;

[0069] A highly moisturizing amino acid composition comprising, by weight, 20 to 40 parts of a third surfactant and 15 to 25 parts of a fourth surfactant;

[0070] The third surfactant comprises powdered cocoyl glycinate and liquid cocoyl glycinate in a weight ratio of (0.8-1): (1-1.2); preferably, the mass concentration of the liquid cocoyl glycinate is 20%-40%;

[0071] The fourth surfactant is an auxiliary surfactant, including at least one of an anionic surfactant, a cationic conditioner, an amphoteric surfactant, and a nonionic surfactant. In this text, the cationic conditioner is a type of polymer with cationic properties, such as polyquaternium, cationic cellulose, cetyltrimethylammonium chloride, etc., and preferably polyquaternium.

[0072] In one embodiment, in the third surfactant:

[0073] The powdered cocoyl glycinate includes at least one of potassium cocoyl glycinate powder and sodium cocoyl glycinate powder; preferably, the potassium cocoyl glycinate powder accounts for ≥85% of the total weight of the powdered cocoyl glycinate;

[0074] The liquid cocoyl glycinate includes at least one of potassium cocoyl glycinate liquid and sodium cocoyl glycinate liquid; preferably, the potassium cocoyl glycinate liquid accounts for ≥85% of the total weight of the liquid cocoyl glycinate.

[0075] In one embodiment, the third surfactant includes potassium cocoyl glycinate powder, sodium cocoyl glycinate powder, potassium cocoyl glycinate liquid, and sodium cocoyl glycinate liquid in a weight ratio of (15 - 25):(0.1 - 2):(15 - 25):(0.1 - 5).

[0076] In one embodiment, the fourth surfactant includes at least one of PPG - 24 - glycerylether - 24, sodium cocoyl aminopropionate, sodium cocoyl amphoacetate, sodium tauryl cocoyl methyltaurate, sodium lauryl methyltaurate, sodium lauroyl glycinate, sodium lauroyl amphoacetate, sodium lauryl glucose carboxylate, and lauryl glucoside.

[0077] In one embodiment, the fourth surfactant includes PPG - 24 - glycerylether - 24, sodium cocoyl aminopropionate, sodium tauryl cocoyl methyltaurate, sodium lauryl glycinate, sodium lauroyl amphoacetate, and lauryl glucose - type surfactants in a weight ratio of (0.1 - 3):(1 - 3):(1 - 5):(1 - 3):(0.1 - 5):(1 - 5); the lauryl glucose - type surfactants described in this text include at least one of sodium lauryl glucose carboxylate and lauryl glucoside, and preferably the two are mixed in a mass ratio of 1:1.

[0078] This application also provides a skin cleanser, including a first agent and a second agent that exist independently of each other;

[0079] The first agent includes: a first polyol, a first thickener, a first surfactant, a second surfactant, a first pH regulator, a first preservative, a second thickener, a fifth surfactant, a first humectant, and optionally a first fragrance additive;

[0080] The second dosage form comprises: a second polyol, a third thickening agent, a third surfactant, a fourth surfactant, a sixth surfactant, a second pH regulator, a second preservative, a fourth thickening agent, and optionally at least one of minerals, active ingredients, and a second fragrance additive;

[0081] Wherein, the definitions of the first surfactant, the second surfactant, the third surfactant, and the fourth surfactant are the same as the relevant definitions in any of the above technical solutions;

[0082] The fifth surfactant and the sixth surfactant are each independently selected from at least one of polyquaternium-7, polyquaternium-39, and polyquaternium-43.

[0083] The skin cleanser of the present application, through the selection and combination of high-concentration and multiple moisturizing agents, namely polysaccharides, cationic conditioners - with good deposition and adsorption, esters - to supplement epidermal lipids, reduces the sense of friction and dryness, forms a biomimetic sebum film structure with good adhesion to the skin, and maintains the stability of the skin barrier.

[0084] In one embodiment, the first dosage form and the second dosage form are separately provided in the same container and can be extruded simultaneously during use, which can avoid the high-concentration moisturizing agent being emulsified and wrapped by excessive surfactants, resulting in ineffectiveness or reduced effectiveness. Moreover, through the supplementation of the moisturizing agent and the selective cleaning effect, while achieving moisturization, it also has a good oil control effect.

[0085] In one embodiment, based on parts by weight, the first dosage form comprises: 15 to 40 parts of a first polyol, 0.1 to 1 part of a first thickening agent, 20 to 40 parts of a first surfactant, 15 to 25 parts of a second surfactant, 0.5 to 5 parts of a first pH regulator, 0.1 to 2 parts of a first preservative, 1 to 10 parts of a second thickening agent, 1 to 10 parts of a fifth surfactant, and 0.1 to 3 parts of a first moisturizing agent;

[0086] Based on parts by weight, the second dosage form comprises: 15 to 30 parts of a second polyol, 0.1 to 5 parts of a third thickening agent, 30 to 45 parts of a third surfactant, 5 to 20 parts of a fourth surfactant, 0.5 to 2 parts of a sixth surfactant, 0.5 to 5 parts of a second pH regulator, 0.1 to 2 parts of a second preservative, and 1 to 10 parts of a fourth thickening agent.

[0087] In one embodiment, based on 100% of the total weight of the first agent, the first agent comprises: 15% to 40% of a first polyol, 0.1% to 1% of a first thickener, 20% to 40% of a first surfactant, 15% to 25% of a second surfactant, 0.5% to 5% of a first pH regulator, 0.1% to 2% of a first preservative, 1% to 10% of a second thickener, 1% to 10% of a fifth surfactant, and 0.1% to 3% of a first humectant;

[0088] Based on 100% of the total weight of the second agent, the second agent comprises: 15% to 30% of a second polyol, 0.1% to 5% of a third thickener, 30% to 45% of a third surfactant, 5% to 20% of a fourth surfactant, 0.5% to 2% of a sixth surfactant, 0.5% to 5% of a second pH regulator, 0.1% to 2% of a second preservative, and 1% to 10% of a fourth thickener.

[0089] By adjusting the appropriate acid value, the maximization of the foam richness of the amino acid surfactant is maintained. And through the compounding of multiple amino acids and mild surfactants, super-micron bubbles that are dense and delicate are achieved, reducing the concentration of the surfactant in contact with the skin, reducing the penetration of free surfactant into the skin, and reducing the risk of penetration into the eyes during cleaning, making the product more mild and less irritating.

[0090] In one embodiment, the first polyol and the second polyol are each independently selected from: glycerol, 1,3 - butanediol, polyethylene glycol - 32, polyethylene glycol - 8, polyethylene glycol - 14M, or any combination thereof; preferably, the first polyol comprises glycerol, 1,3 - butanediol, and polyethylene glycol - 32 in a weight ratio of (15 - 25):(1 - 5):(1 - 5); the second polyol comprises glycerol, polyethylene glycol - 8, and polyethylene glycol - 14M in a weight ratio of (15 - 25):(1 - 5):(0.01 - 0.1);

[0091] The first humectant is selected from: hydrolyzed hydrogenated starch, ethyl PCA - cocoyl arginine salt, dipotassium glycyrrhizinate, or any combination thereof;

[0092] The first thickener and the third thickener are each independently selected from: hydroxypropyl starch phosphate, the group of corn starch and disodium lauryl sulfosuccinate, hydroxypropyl starch phosphate, or any combination thereof;

[0093] The second thickener and the fourth thickener are each independently selected from: copolymers of acrylic acid or its esters, stearyl alcohol ether 20 - methacrylate copolymer, or any combination thereof;

[0094] The first pH regulator and the second pH regulator are citric acid;

[0095] The first preservative and the second preservative are each independently selected from: p-hydroxyacetophenone, 1,2-hexanediol, octyldecanol, or any combination thereof;

[0096] The minerals are selected from: mineral mud, volcanic mud or any combination thereof;

[0097] The active ingredients are selected from: bifida ferment lysate, hydrogenated starch hydrolysate, phytosterols, PPG-13 decyltetradeceth-24, maleic acid modified castor oil, trehalose, or any combination thereof.

[0098] In one embodiment, by adding a short-rheology thickening stabilizer, a large amount of antifreeze polyol, and a high-purity amino acid surfactant, the material is prevented from hardening due to low-temperature supersaturation, a large amount of crystal precipitation, concentration, overly dense crystallization, and overly strong thickening. Therefore, even under the condition of high active substances in the product, good extrudability can still be maintained at a low temperature of 3-5°C.

[0099] A preparation method of a skin cleanser according to any one of the above technical solutions includes the following steps:

[0100] S100: Prepare the raw materials for preparing the first agent and the second agent according to the formula of the skin cleanser according to any one of the above technical solutions, and perform phase classification, where:

[0101] The phases for preparing the first agent include:

[0102] Phase A1: containing a first polyol, a first thickener, and a first surfactant;

[0103] Phase B1: containing a second surfactant;

[0104] Phase C1: containing a first pH regulator;

[0105] Phase D1: containing a first preservative;

[0106] Phase E1: containing a second thickener;

[0107] Phase F1: containing a fifth surfactant;

[0108] Phase G1: containing a first humectant;

[0109] The phases for preparing the second agent include:

[0110] Phase A2: containing a second polyol and a third thickener;

[0111] Phase B2: containing a third surfactant and a fourth surfactant;

[0112] Phase C2: containing a sixth surfactant;

[0113] Phase D2: containing a second pH regulator;

[0114] Phase E2: containing a second preservative;

[0115] Phase F2: containing a fourth thickener;

[0116] S200: To prepare the first agent, including:

[0117] Provide stirring force to mix the components of Phase A1 evenly, then add Phase B1 and mix, then raise the temperature to 85°C - 90°C, add Phase C1 and Phase D1 and mix, then adjust the stirring speed to 3000 rpm - 20000 rpm, and add Phase E1, Phase F1, and Phase G1 and mix;

[0118] S300: To prepare the second agent, including:

[0119] Provide stirring force to mix the components of Phase A2 evenly, then add Phase B2 and mix, then raise the temperature to 85°C - 90°C, add Phase C2, Phase D2, and Phase E2 and mix, then adjust the stirring speed to 3000 rpm - 20000 rpm, and add Phase F2 and mix.

[0120] The following are some specific embodiments.

[0121] For the experimental parameters not specified in the following specific embodiments, preferably refer to the guidance given in this application document, and you can also refer to the experimental manuals in this field or other experimental methods known in this field, or refer to the experimental conditions recommended by the manufacturers.

[0122] In the following embodiments, each raw material and reagent can be obtained commercially, or those skilled in the art can prepare them according to known means.

[0123] I. Preparation of facial wash products

[0124] 1. Preparation of the facial wash product in the embodiment

[0125] 1.1 Preparation of the facial washes of Embodiments 1 - 5

[0126] This part provides a preparation method for a dual - tube facial wash. The raw materials and their dosages are shown in Tables 1 - 2, and the preparation steps are as follows:

[0127] (1) Preparation of the first agent, which is the content in the outer tube

[0128] Provide stirring force to mix the components of Phase A1 evenly, then successively add the components of Phase B1 and mix, then raise the temperature to 85°C - 90°C, add Phase C1 (pre - prepared as a solvent) and Phase D1 and mix, then adjust the stirring speed to 3000 rpm - 20000 rpm, add Phase E1 and mix, then successively add the components of Phase F1 and mix, and then add the components of Phase G1 and mix;

[0129] (2) Preparation of the second agent, which is the content in the inner tube

[0130] Provide stirring force to mix the components of the A2 phase evenly, then successively add the components of the B2 phase and mix, then raise the temperature to 85°C to 90°C, add the components of the C2 phase, D2 phase and E2 phase successively and mix, then adjust the stirring speed to 3000 rpm to 20000 rpm, add the F2 phase (pre-prepared as a solvent) and mix, and then successively add the components of the G2 phase and H2 phase and mix.

[0131] Table 1 Formula of the outer tube

[0132]

[0133]

[0134] Table 2 Formula of the inner tube

[0135]

[0136]

[0137] The above Examples 1 to 5 are composed of Examples 1 to 5' and Examples 1 to 5" in one-to-one correspondence, that is, (Example 1 is a double-tube facial cleanser, the inner tube is Example 1', and the outer tube is Example 1". The same applies to other examples).

[0138] 1.2 Preparation of facial cleansers of Examples 6 to 12

[0139] Example 6

[0140] Provide the outer tube raw materials according to the same ratio as in Example 1" in Table 1. The difference from Example 1" is that sodium lauroamphoacetate is replaced with sodium lauroyl glutamate in equal proportion; provide the inner tube raw materials according to the same ratio as in Example 1' in Table 2.

[0141] Example 7

[0142] Provide the outer tube raw materials according to the same ratio as in Example 1" in Table 1. The difference from Example 1" is that sodium lauroamphoacetate is replaced with sodium cocoyl glutamate in equal proportion; provide the inner tube raw materials according to the same ratio as in Example 1' in Table 2.

[0143] Example 8

[0144] Provide the outer tube raw materials according to the same ratio as in Example 1" in Table 1. The difference from Example 1" is that sodium lauroamphoacetate is replaced with lauryl hydroxysulfobetaine in equal proportion; provide the inner tube raw materials according to the same ratio as in Example 1' in Table 2.

[0145] Example �

[0146] Provide the outer tube raw materials in the same ratio as in Example 1 of Table 1. The difference from Example 1 is that sodium lauroamphoacetate is replaced in equal proportion with a group composed of sodium lauroamphoacetate and sodium cocoyl glutamate, and the weight ratio of sodium lauroamphoacetate to sodium cocoyl glutamate is 2:6; provide the inner tube raw materials in the same ratio as in Example 1' of Table 2.

[0147] Example 10

[0148] Provide the outer tube raw materials in the same ratio as in Example 1 of Table 1. The difference from Example 1 is that sodium lauroamphoacetate is replaced in equal proportion with a group composed of sodium lauroamphoacetate and sodium lauroyl glutamate, and the weight ratio of sodium lauroamphoacetate to sodium lauroyl glutamate after replacement is 3:5; provide the inner tube raw materials in the same ratio as in Example 1' of Table 2.

[0149] Example 11

[0150] Provide the outer tube raw materials in the same ratio as in Example 1 of Table 1. The difference from Example 1 is that sodium lauroamphoacetate is replaced in equal proportion with a group composed of sodium lauroamphoacetate and sodium cocoyl glutamate, and the weight ratio of sodium lauroamphoacetate to sodium cocoyl glutamate after replacement is 4:4; provide the inner tube raw materials in the same ratio as in Example 1' of Table 2.

[0151] Example 12

[0152] Provide the outer tube raw materials in the same ratio as in Example 1 of Table 1. The difference from Example 1 is that sodium lauroamphoacetate is replaced in equal proportion with a group composed of sodium lauroamphoacetate and sodium lauroyl glutamate, and the weight ratio of sodium lauroamphoacetate to sodium lauroyl glutamate after replacement is 5:3; provide the inner tube raw materials in the same ratio as in Example 1' of Table 2.

[0153] 2. Prepare the comparative facial cleanser product

[0154] This part provides a preparation method for a double-tube facial cleanser for comparison. The raw materials and their dosages are shown in Tables 3 - 4, and the preparation steps are the same as in Example 1.

[0155] Table 3 Formula of the outer tube

[0156]

[0157]

[0158] Table 4 Formula of the inner tube

[0159]

[0160]

[0161] II. Product Performance Testing

[0162] Take the materials of the above Examples 1” to 12’ and Examples 1” to 12” in a ratio of 1:1 and load them into two separate tubes for standby. Take the materials of Comparative Examples 1’ to 5’ and Comparative Examples 1’ to 5” in a ratio of 1:1 and load them into two separate tubes for standby. Then conduct the following tests respectively:

[0163] 1. Selective Cleaning Test

[0164] Prepare a 1wt% concentration sample from the Examples and Comparative Examples (where the inner tube and the outer tube are approximately 1:1). Quantitatively apply the sebum formula solutions of cholesterol and squalene oxide to the pigskin respectively and let it dry. Fix the pigskin coated with the sebum formula on the stirring paddle and place it in 1L of the sample solution for stirring (150r / 10min). After stirring, rinse the surfactant on the pigskin with tap water, and conduct Soxhlet extraction on the pigskin. Test and record the ratio of squalene oxide and cholesterol in the sebum before and after cleaning, and calculate the difference between the two ratios. If the difference is positive, it indicates selective cleaning; if the difference is negative, it indicates no selective cleaning effect.

[0165] Table 5 Selective Cleaning Test Results

[0166]

[0167] According to Table 5, for Examples 1 to 5 and Comparative Example 5, the difference in the ratio (squalene oxide / cholesterol) before and after cleaning is positive, indicating good selective cleaning effect. For Comparative Examples 1 to 4, the difference in the ratio (squalene oxide / cholesterol) before and after cleaning is negative, indicating no selective cleaning effect.

[0168] 2. Immediate Moisture Content Test after Washing

[0169] Prepare 15%wt concentration samples from the Examples and Comparative Examples (where the inner tube and the outer tube are approximately 1:1) and commercial products 1 to 5. Then quickly foam them with a foaming device until the foam is dense and thick. Scoop up enough foam and apply it to the test area, gently rub in circles for 30s. In the control area, use a dropper to suck deionized water and apply it and rub in circles for 30s. Then rinse with clean water for 30s, and gently dry the moisture on the skin surface with a lint-free tissue. Test the skin moisture 5 minutes after washing. Use the skin testing instrument Croneometer CM825 and the moisture probe for testing.

[0170] Table 6 Immediate Moisture Content Test Results after Washing

[0171]

[0172] According to Table 6, within five minutes after washing, the skin moisture increased compared to before washing, that is, it had a moisturizing effect at 5 minutes and consumers would not feel dry before further using skin care products. For Comparative Examples 1-5, the skin moisture decreased at 5 minutes compared to before washing, that is, it had no moisturizing effect at 5 minutes.

[0173] For the Examples compared with Commercial Products 1-5, Commercial Product 2 was comparable to Examples 1-5, while Commercial Products 1, 3-5 were inferior to the Examples.

[0174] 3. Influence on skin barrier after washing

[0175] Samples with a concentration of 15% wt were prepared from the Examples, Comparative Examples (where the inner tube and outer tube were approximately 1:1), and Commercial Products 1-2. Then, a foaming agent was used to quickly foam until the foam was dense and thick. An adequate amount of foam was scooped and applied to the test area, and gently circled for 30 s. The blank control area was smeared and circled with deionized water using a dropper for 30 s. The test areas were rinsed with clean water for 30 s and gently dried with a lint-free tissue. The transepidermal water loss rate was measured 5 minutes later.

[0176] Table 7 Test results of transepidermal water loss rate 5 minutes after washing

[0177]

[0178]

[0179] According to Table 7, for the Examples 1-5, Comparative Examples 1-5, and Commercial Products, the transepidermal water loss rate measured at 5 minutes increased compared to before washing. For Comparative Examples 3, 5 and Commercial Products 1, 2, the transepidermal water loss rate was higher than that of other products, indicating that the influence on the skin barrier might be greater and accelerating the loss of skin moisture. While other Examples and Comparative Examples were comparable, indicating a relatively smaller influence.

[0180] 4. Appearance evaluation

[0181] After loading Examples 1-5 and Comparative Examples 1-5 into a double-tube packaging material, the outer tube and extrusion performance of the products were tested.

[0182] Table 8 Outer tube evaluation results

[0183]

[0184]

[0185] 5. Oil control test

[0186] Samples with a concentration of 15% were prepared from Examples 1, 3, 5, Comparative Examples 1, 3, 5. A foaming agent was used to quickly foam for 30 s, and an adequate amount of foam was scooped and applied to the test area on the foreheads of volunteers.

[0187] Circle the foam in the test areas on the left and right sides for 30 s respectively, and then rinse with clear water for 30 s. Suck dry with lint-free absorbent paper towels, sit quietly in a standard test environment with the forehead exposed, keep relaxed, and avoid touching the forehead. Wait for 30 min for the tested area to dry naturally, and then measure the sebum amount on the skin surface after applying and cleaning the samples on both sides of the test area. The test time points are 30 min, 60 min, and 120 min. Calculate the percentage change in oil compared to before the test at the test time points. The results are shown in Table 9.

[0188] Table 9 Percentage change in oil compared to before the test at the test time points

[0189] Test Items 30 min 60 min 120 min Example 1 -75.5％ -52.6％ -11.9％ Example 3 -71.1％ -53.0％ -22.4％ Example 5 -71.3％ -50.9％ -16.0％ Comparative Example 1 -55.32％ -32.15％ -5.60％ Comparative Example 3 -65.41％ -20.35％ -10.20％ Comparative Example 5 -72.15 -51.25％ -15.32％

[0190] According to Table 9, for Examples 1, 3, 5 and Comparative Examples 1, 3, 5, the skin oil decreased compared to before washing, and did not return to the original oil amount within 120 minutes, that is, they all had oil control effects.

[0191] 6. Consumer evaluation test

[0192] Give Examples 1-5 and Comparative Examples 1-5 to consumers for use respectively. Each group (for example: Example 1 and Comparative Example 1 as a group) of samples is distributed to 5 consumers for use. The usage frequency is once in the morning and once in the evening. After using for one week, evaluate and score the products. The higher the score, the better the effect and the higher the satisfaction. The scores are from 1 to 5. 1 point represents very dissatisfied, 2 points represents relatively dissatisfied, 3 points represents average effect, 4 points represents relatively satisfied, and 5 points represents very satisfied.

[0193] Richness of foam: That is, when rubbing and washing the face, whether you feel that the foam is very rich and dense. A high score represents rich foam, and a low score indicates less foam and easy to disappear.

[0194] Ease of rinsing: That is, when rinsing the face with water after using the facial cleanser, whether you feel that it is very easy to rinse clean and has a refreshing sense of cleanliness. The higher the score, the better the rinsing property, and the lower the score indicates that the product has a greasy feeling.

[0195] Eye and skin mildness: That is, when using the facial cleanser, whether there are irritating sensations such as stinging and itching in the eyes and on the skin. If not, it means it is very mild. If there is irritation, the lower the score.

[0196] Moisturizing property: That is, whether you feel that the skin is moisturized within 5 minutes after drying the washed skin. A high score indicates better moisturization, and a low score indicates very dry.

[0197] Table 10 Evaluation results after consumer use

[0198] Item Example 1 Example 2 Example 3 Example 4 Example 5 Richness of Foam 4.5 4.2 4.2 4.5 4.2 Ease of Rinsing 4.5 4.3 4.2 4.3 4.5 Eye and Skin Mildness 4.4 4.4 4.2 4.0 4.3 Moisturizing Property 4.6 4.2 4.3 4.5 4.5 Item Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Richness of Foam 3.0 3.5 3.5 4.0 4.2 Ease of Rinsing 4.5 4.2 3.8 4.5 4.5 Eye and Skin Mildness 4.0 4.2 3.0 3.5 3.5 Moisturizing Property 3.5 3.8 3.2 3.5 3.0

[0199] 7. Foam Performance Test

[0200] For Example 1, 3, 5, Comparative Example 1, 3, 5, and commercially available product 1 and commercially available double-tube product 2, take 1 g of the sample respectively, add an appropriate amount of water, knead for 20 seconds, and then take a photo to record the state of the foam.

[0201] Take photos of the foam kneaded on the hand for the examples and comparative examples. The photo results are as Figure 1 . According to Figure 1 , compared with Comparative Example 1-5, the foam of Example 1-5 has a better sense of density and thickness.

[0202] 8. Foam Particle Size Test

[0203] Prepare 10% aqueous solutions for Example 1, 3 and Comparative Example 1, 3. Weigh 10 g of the aqueous solution to be tested, use a foaming bottle to foam 100 times, and immediately take a small amount of the foam and place it under a microscope for observation after the foam is prepared. Observe and photograph using the 4x objective lens of the microscope. At least 3 groups can be repeated. Select pictures, count the foam size and number in this area, organize and analyze the experimental data. The statistical results are shown in Table 11, and the foam particle size distribution diagram is as Figure 2 .

[0204] Table 11 Foam Particle Size Distribution Diagram

[0205]

[0206] The technical features of the above-described embodiments and examples can be combined in any suitable manner. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments and examples are described. However, as long as these combinations of technical features do not conflict, they should all be considered to be within the scope described in this specification.

[0207] The above-described examples only represent several embodiments of the present application, but should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. In addition, it should be understood that after reading the above teachings of the present application, those skilled in the art can make various changes or modifications to the present application, and the equivalent forms obtained also fall within the protection scope of the present application. It should also be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments based on the technical solutions provided in the present application are all within the protection scope of the appended claims of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims, and the specification can be used to explain the content of the claims.

Claims

1. A skin cleanser, characterized in that, Comprising a first agent and a second agent that exist independently of each other; The first agent includes: a first polyol, a first thickener, a first surfactant, a second surfactant, a first pH regulator, a first preservative, a second thickener, a fifth surfactant, a first humectant, and optionally a first fragrance additive; The second agent includes: a second polyol, a third thickener, a third surfactant, a fourth surfactant, a sixth surfactant, a second pH regulator, a second preservative, a fourth thickener, and optionally at least one of a mineral, an active ingredient, and a second fragrance additive; Among them, in terms of parts by weight, the first agent includes 20 - 40 parts of the first surfactant and 15 - 25 parts of the second surfactant; the first surfactant includes potassium cocoyl glycinate powder and sodium cocoyl glycinate powder with a weight ratio of (20 - 28):(1 - 5), and the potassium cocoyl glycinate powder accounts for ≥85% of the total weight of the first surfactant; the second surfactant includes potassium cocoyl glycinate solution, sodium cocoyl aminopropionate, a sulfonate surfactant, and an amphoteric surfactant with a weight ratio of 10:(5 - 10):(1 - 8):(5 - 10); the sulfonate surfactant is sodium methyl lauroyl taurate; the amphoteric surfactant is sodium lauroamphoacetate; In terms of parts by weight, the second agent includes 30 - 45 parts of the third surfactant and 5 - 20 parts of the fourth surfactant; the third surfactant includes a powdery cocoyl glycinate and a liquid cocoyl glycinate with a weight ratio of (0.8 - 1):(1 - 1.2); the mass concentration of the liquid cocoyl glycinate is 20% - 40%; The fourth surfactant is an auxiliary surfactant, including at least one of an anionic surfactant, a cationic conditioner, an amphoteric surfactant, and a nonionic surfactant; the fifth surfactant and the sixth surfactant are each independently selected from at least one of polyquaternium - 7, polyquaternium - 39, and polyquaternium - 43.

2. The skin cleanser according to claim 1, characterized in that, In terms of parts by weight, the first agent includes: 15 - 40 parts of the first polyol, 0.1 - 1 part of the first thickener, 20 - 40 parts of the first surfactant, 15 - 25 parts of the second surfactant, 0.5 - 5 parts of the first pH regulator, 0.1 - 2 parts of the first preservative, 1 - 10 parts of the second thickener, 1 - 10 parts of the fifth surfactant, and 0.1 - 3 parts of the first humectant; In terms of parts by weight, the second agent includes: 15 - 30 parts of the second polyol, 0.1 - 5 parts of the third thickener, 30 - 45 parts of the third surfactant, 5 - 20 parts of the fourth surfactant, 0.5 - 2 parts of the sixth surfactant, 0.5 - 5 parts of the second pH regulator, 0.1 - 2 parts of the second preservative, 1 - 10 parts of the fourth thickener.

3. The skin cleanser according to claim 1 or 2, characterized in that, The first polyol and the second polyol are each independently selected from at least one of glycerol, 1,3 - butanediol, polyethylene glycol - 32, polyethylene glycol - 8, and polyethylene glycol - 14M; optionally, the first polyol comprises glycerol, 1,3 - butanediol, and polyethylene glycol - 32 in a weight ratio of (15 - 25):(1 - 5):(1 - 5); optionally, the second polyol comprises glycerol, polyethylene glycol - 8, and polyethylene glycol - 14M in a weight ratio of (15 - 25):(1 - 5):(0.01 - 0.1); The first humectant is selected from: hydrolyzed hydrogenated starch, ethyl PCA - cocoyl arginine salt, dipotassium glycyrrhizinate, or any combination thereof; The first thickener and the third thickener are each independently selected from hydroxypropyl starch phosphate, the group of corn starch and disodium lauryl sulfosuccinate, hydroxypropyl starch phosphate, or any combination thereof; The second thickener and the fourth thickener are each independently selected from copolymers of acrylic acid or its esters, stearyl alcohol ether 20 - methacrylate copolymer, or any combination thereof; The first pH regulator and the second pH regulator are citric acid; The first preservative and the second preservative are each independently selected from hydroxyacetophenone, 1,2 - hexanediol, caprylyl glycol, or any combination thereof; The mineral is selected from: mineral mud, volcanic mud, or any combination thereof; The efficacy ingredient is selected from: bifida ferment lysate, hydrolyzed hydrogenated starch, phytosterols, PPG - 13 decyltetradeceth - 24, maleic acid modified castor oil, trehalose, or any combination thereof.

4. The skin cleanser according to claim 1, characterized in that, In the third surfactant: The powdered cocoyl glycinate includes at least one of potassium cocoyl glycinate powder and sodium cocoyl glycinate powder; the potassium cocoyl glycinate powder accounts for ≥85% of the total weight of the powdered cocoyl glycinate; The liquid cocoyl glycinate includes at least one of potassium cocoyl glycinate liquid and sodium cocoyl glycinate liquid; the potassium cocoyl glycinate liquid accounts for ≥85% of the total weight of the liquid cocoyl glycinate; 5. The skin cleanser according to claim 4, wherein, The third surfactant comprises potassium cocoyl glycinate powder, sodium cocoyl glycinate powder, potassium cocoyl glycinate liquid, and sodium cocoyl glycinate liquid in a weight ratio of (15 - 25):(0.1 - 2):(15 - 25):(0.1 - 5); 6. The skin cleanser according to claim 1, wherein The fourth surfactant includes at least one of PPG - 24 - glycereth - 24, sodium cocoyl aminopropionate, sodium cocoyl amphoacetate, sodium cocoyl methyl taurate, sodium lauroyl methyl taurate, sodium lauryl glycol carboxylate, sodium lauryl amphoacetate, sodium lauryl glucose carboxylate, and lauryl glucoside; 7. The skin cleanser according to claim 6, wherein, In the fourth surfactant, it includes PPG - 24 - glycereth - 24, sodium cocoyl aminopropionate, sodium cocoyl methyl taurate, sodium lauryl glycol carboxylate, sodium lauryl amphoacetate, and sodium lauryl glucose carboxylate in a weight ratio of (0.1 - 3):(1 - 3):(1 - 5):(1 - 3):(0.1 - 5):(1 - 5); The lauryl glucoside surfactant refers to at least one of sodium lauryl glucoside carboxylate and lauryl glucoside.

8. The preparation method of the skin cleanser according to any one of claims 1 to 7, characterized in that, It includes the following steps: S100: Prepare the raw materials for preparing the first agent and the second agent according to the formula of the skin cleanser according to any one of claims 1 to 7, and conduct phase classification, where: The phases for preparing the first agent include: Phase A1: containing the first polyol, the first thickener, and the first surfactant; Phase B1: containing the second surfactant; Phase C1: containing the first pH regulator; Phase D1: containing the first preservative; Phase E1: containing the second thickener; Phase F1: containing the fifth surfactant; Phase G1: containing the first humectant; The phases for preparing the second agent include: Phase A2: containing the second polyol and the third thickener; Phase B2: containing the third surfactant and the fourth surfactant; Phase C2: containing the sixth surfactant; Phase D2: containing the second pH regulator; Phase E2: containing the second preservative; Phase F2: containing the fourth thickener; S200: Prepare the first agent, including: Provide stirring force, mix the components of Phase A1 evenly, then add Phase B1 and mix, then raise the temperature to 85°C - 90°C, add Phase C1 and Phase D1 and mix, then adjust the stirring speed to 3000 rpm - 20000 rpm, and add Phase E1, Phase F1, and Phase G1 and mix; S300: Prepare the second agent, including: Provide stirring force, mix the components of Phase A2 evenly, then add Phase B2 and mix, then raise the temperature to 85°C - 90°C, add Phase C2, Phase D2, and Phase E2 and mix, then adjust the stirring speed to 3000 rpm - 20000 rpm, and add Phase F2 and mix.

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