Mild washing and unloading two-in-one composition as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of cosmetics, and discloses a mild washing and unloading two-in-one composition as well as a preparation method and application thereof. The composition disclosed by the invention is prepared from the following components in parts by mass: 0.5 to 20 parts of sodium diethylhexyl sulfosuccinate, 0.1 to 8 parts of polyglycerol-10 stearate, 0.5 to 40 parts of disodium cocoyl glutamate and 0.5 to 45 parts of sodium methyl cocoyl taurate. According to the formula of the composition, the sodium diethylhexyl sulfosuccinate, the polyglycerol-10 stearate, the disodium cocoyl glutamate and the sodium methyl cocoyl taurate are combined according to the unique formula and are scientifically proportioned, so that a good synergistic interaction effect is generated among all the components, foam is richer and more stable, and the skin care effect is better. The sunscreen cream has excellent cleaning power, can effectively remove sunscreen product residues, avoids irritation to skin, and maintains natural barrier and acid-base balance of the skin.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, and specifically relates to a gentle two-in-one cleansing and makeup removal composition, its preparation method, and its application. Background Technology

[0002] With the improvement of people's living standards and the pursuit of beauty, skincare has become an indispensable part of daily life. However, in the field of skincare, sun protection is a key line of defense against ultraviolet rays and for protecting skin health; applying sunscreen has become an important step in skincare. But the problem of cleaning after sun protection also arises, leading to the development of facial cleansers to remove sunscreen. Ordinary facial cleansers often fall short when dealing with sunscreen, especially waterproof or high-SPF sunscreens, whose complex film-forming agents and chemical sunscreens easily leave residue on the skin's surface. If not thoroughly cleansed, these residues can clog pores over time, causing skin problems such as acne and blackheads, and may also lead to dullness and roughness of the skin.

[0003] Traditional makeup removers, while powerful in their cleansing properties, are also highly irritating. Frequent use can damage the skin barrier, making the skin fragile and sensitive, leading to symptoms such as redness, dryness, and itching. Therefore, effectively removing sunscreen residue while avoiding skin irritation and maintaining the skin's natural barrier and pH balance remains a pressing technical challenge in this field. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the object of the present invention is to provide a gentle two-in-one cleansing and makeup removal composition, its preparation method, and its application. The composition of the present invention is gentle and non-irritating, provides rich, dense, and stable foam, and has excellent cleansing power, effectively removing sunscreen residue while avoiding skin irritation and maintaining the skin's natural barrier and pH balance.

[0005] In a first aspect, the present invention provides a composition comprising, by weight parts: 0.5-20 parts of sodium diethylhexyl sulfosuccinate, 0.1-8 parts of polyglycerol-10 stearate, 0.5-40 parts of disodium cocoyl glutamate, and 0.5-45 parts of sodium methyl cocoyl taurate.

[0006] In some embodiments of the present invention, the composition comprises, by weight parts, the following components: 0.5-12 parts of sodium diethylhexyl sulfosuccinate, 0.1-6 parts of polyglycerol-10 stearate, 0.5-30 parts of disodium cocoyl glutamate, and 0.5-40 parts of sodium methyl cocoyl taurate.

[0007] In some embodiments of the present invention, the composition comprises, by weight parts, the following components: 3-8 parts of sodium diethylhexyl sulfosuccinate, 1-3 parts of polyglycerol-10 stearate, 9-18 parts of disodium cocoyl glutamate, and 15-30 parts of sodium methyl cocoyl taurate.

[0008] Specifically, the sodium diethylhexyl sulfosuccinate described in this invention, as an anionic surfactant, can insert its lipophilic groups into the gaps or pores of a solid surface through its molecular structure, thereby driving the liquid to penetrate into the solid and achieving a good penetration effect; while the hydrophilic groups combine with water molecules, which can reduce the interfacial tension between the liquid and the solid surface, allowing the film-forming agents and chemicals that originally adhered to the skin to be dispersed into tiny oil droplets by water, avoiding the clumping of oil residue during makeup removal, thereby peeling oil and dirt from the skin surface and dispersing them in water, achieving a two-in-one cleansing and makeup removal effect.

[0009] Specifically, the polyglycerol-10 stearate of this invention is obtained by polymerization of plant-derived glycerol and stearic acid. Glycerol can be obtained from the hydrolysis of natural oils, while stearic acid is mainly derived from plant oils such as palm oil. Polyglycerol-10 stearate is a nonionic surfactant with multiple hydrophilic hydroxyl groups and one lipophilic stearic acid group in its molecular structure. This structure allows it to oriented at the oil-water interface, with the lipophilic group facing the oil phase and the hydrophilic group facing the water phase, reducing the tension at the oil-water interface. The lipophilic group (stearic acid chain) in its molecule can combine and dissolve with sunscreen film-forming agents and chemical sunscreens, while the hydrophilic group (polyglycerol chain) can connect to water molecules, helping to evenly disperse the dissolved oil particles. This ensures that solid particles are evenly dispersed in the liquid medium, preventing oil from re-adhering to the skin surface, thus allowing oil droplets to be evenly dispersed in the aqueous phase. The polyglycerol portion in polyglycerol-10 stearate has strong hydrophilicity, enabling it to absorb moisture from the air and form a moisturizing film on the skin surface, preventing moisture loss and providing a moisturizing effect.

[0010] Specifically, the disodium cocoyl glutamate of this invention is based on a naturally occurring amino acid (L-glutamic acid) and serves as an amino acid-type anionic surfactant. Its molecule contains a hydrophilic carboxylate group (-COO). - Na +It contains both lipophilic cocoyl groups (derived from coconut oil fatty acids) and hydrophilic groups. The lipophilic groups adsorb oil and dirt from the skin / hair surface, while the hydrophilic groups bind to water molecules. By reducing the surface tension of water, it removes and disperses dirt in the water, achieving cleaning. In aqueous solution, its molecules can oriented at the gas-liquid interface, reducing interfacial tension and allowing air to easily integrate and form bubbles. Simultaneously, the molecules form a protective film on the bubble surface, maintaining foam stability and producing fine foam. Its structure is similar to the natural amino acids in human skin, resulting in low irritation to the skin barrier. Furthermore, its molecules can form a weakly acidic protective film on the skin surface, helping to maintain the skin's normal pH value and reducing damage to the skin during cleansing.

[0011] Specifically, the sodium methyl cocoyl taurate of this invention is prepared by acylation reaction of natural coconut oil fatty acids with sodium methyl taurate under alkaline conditions. It is a bio-based surfactant with a biodegradability exceeding 98%, making it natural and safe. Its molecular structure contains a hydrophilic structure composed of hydrophilic sulfonic acid groups and carboxyl groups, as well as lipophilic cocoyl groups. The lipophilic groups can adsorb oil and dirt from the skin or hair surface, while the hydrophilic groups bind with water molecules, reducing the surface tension of water, thus removing and dispersing dirt in the water for cleaning. Simultaneously, the combination of the amide bond and sulfonic acid group in its molecule gives it both gentleness and cleaning power, resulting in low skin irritation. It can form a moisturizing film on the skin surface, helping the skin absorb and retain moisture, preventing moisture loss, and increasing skin softness and smoothness. It can improve the permeability of other active ingredients in skincare products, making them easier for the skin to absorb and enhancing the effects and efficacy of skincare products.

[0012] Specifically, the sodium diethylhexyl sulfosuccinate and polyglycerol-10 stearate in the composition of this invention exhibit excellent cleansing effects, particularly against complex film-forming agents and chemical sunscreens. They can be combined with disodium cocoyl glutamate and sodium methyl cocoyl taurate for a synergistic effect on foam, providing richer, denser, and more stable foam, while also exhibiting excellent gentleness, preventing excessive cleansing and protecting the skin barrier. Furthermore, polyglycerol-10 stearate and sodium diethylhexyl sulfosuccinate possess good thickening properties, achieving the desired product formulation viscosity with reduced amounts of sodium chloride or emulsifying thickeners. For example, some facial cleansing product systems that use sodium chloride for thickening can achieve the desired viscosity without sodium chloride, or even achieve a higher viscosity than with sodium chloride thickening, thereby reducing costs while maintaining product gentleness. Disodium cocoyl glutamate and sodium methyl cocoyl taurate are amino acid surfactants with good skin affinity and moisturizing, antibacterial, and antioxidant properties, leaving the skin feeling soft and refreshing. This invention combines four specific surfactants—sodium diethylhexyl sulfosuccinate, polyglycerol-10 stearate, disodium cocoyl glutamate, and sodium methyl cocoyl taurate—in a scientifically formulated ratio. This combination exhibits a synergistic effect, resulting in a milder, more stable composition with richer foam, lower irritation, and effective removal of sunscreen residue.

[0013] A second aspect of the present invention provides a method for preparing the composition described in the first aspect of the present invention, comprising the following steps: The components are mixed to obtain the composition.

[0014] In some embodiments of the present invention, the method for preparing the composition includes the following steps: Polyglycerol-10 stearate and disodium cocoyl glutamate were mixed, stirred, and heated to 60-65°C. Then, sodium methyl cocoyl taurate and sodium diethylhexyl sulfosuccinate were added and stirred homogenously to obtain the composition.

[0015] A third aspect of the invention provides the use of the composition described in the first aspect of the invention in the preparation of skin cleansing products.

[0016] A fourth aspect of the present invention provides a skin cleansing product comprising the composition described in the first aspect of the present invention.

[0017] In some embodiments of the present invention, the composition has a mass content of 1%-80% in the skin cleansing product.

[0018] Specifically, the mass content of the composition in the skin cleansing product can be any point value or any two points within the range of 1% to 80%, such as 1%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, etc. Preferably, it is 10%-70%; more preferably, it is 20%-50%.

[0019] In some embodiments of the present invention, the skin cleansing product further includes at least one of a thickener, a moisturizer, an emulsifier, a preservative, and a fragrance.

[0020] In some embodiments of the present invention, the skin cleansing product is used to remove residue from sunscreen products. The sunscreen products include sunscreen cream.

[0021] In some embodiments of the present invention, the pH of the skin cleansing product is 5-10.

[0022] In some embodiments of the present invention, the pH of the skin cleansing product is 8-10.

[0023] In some embodiments of the present invention, the types of skin cleansing products include facial cleansers, cleansing lotions, cleansing creams, cleansing gels, or cleansing mousses.

[0024] In some embodiments of the present invention, the type of skin cleansing product is a facial cleanser, which includes the composition described in the first aspect of the present invention, glycerin, glyceryl oleate, acrylic (ester) copolymer, citric acid, p-hydroxyacetophenone, 1,2-hexanediol, fragrance and water.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The formulation of the composition of the present invention contains sodium diethylhexyl sulfosuccinate, polyglycerol-10 stearate, disodium cocoyl glutamate and sodium methyl cocoyl taurate. Through such a unique formulation and scientific ratio, the components have a good synergistic effect. Compared with soap-based cleaning products, the composition of the present invention is mild and non-irritating and suitable for sensitive skin. Compared with pure amino acid surfactant products, which are difficult to thicken and have insufficient cleaning power, the composition of the present invention has richer and more stable foam, excellent cleaning power, and has its own thickening effect. Compared with other general surfactant products, the composition of the present invention has good affinity to the skin, moisturizes, and brings a soft and refreshing skin feel.

[0026] (2) The composition of the present invention can penetrate deep into the pores, completely dissolve and remove stubborn sunscreen residue, while avoiding skin irritation and maintaining the skin's natural barrier and acid-base balance.

[0027] (3) When disodium cocoyl glutamate and sodium methyl cocoyl taurate are added directly to the product, particulate matter is easily precipitated at low temperature (< -5℃) or pH ≥ 8.0, which greatly limits their addition amount in the product. However, the present invention combines them with sodium diethylhexyl sulfosuccinate and polyglycerol-10 stearate, which can solve this problem well. The composition of the present invention did not precipitate particles in high and low temperature tests and tests at different pH ranges, which broadens the application range of disodium cocoyl glutamate and sodium methyl cocoyl taurate. They can be added to products with different pH values ​​and their usage amount can be increased.

[0028] (4) The composition of the present invention has strong universality and is suitable for different skin groups, such as: clean products for people with fragile skin, children's clean products, and clean products for pregnant and postpartum women.

[0029] (5) The preparation method of the composition of the present invention is simple to operate, the process is stable, and it can be widely promoted and applied. Detailed Implementation

[0030] The present invention will be further described in detail below through specific embodiments. Unless otherwise specified, the raw materials, reagents, or apparatus used in the embodiments can be obtained from conventional commercial sources or by existing technical methods. Unless otherwise specified, the experimental or testing methods are conventional methods in the art.

[0031] Example 1 A composition comprising the following components in parts by weight: 6 parts sodium diethylhexyl sulfosuccinate, 1 part polyglycerol-10 stearate, 13 parts disodium cocoyl glutamate and 20 parts sodium methyl cocoyl taurate.

[0032] The preparation method of the composition in this embodiment is as follows: polyglycerol-10 stearate and disodium cocoyl glutamate are mixed, stirred, heated to 60°C, and then sodium methyl cocoyl taurate and sodium diethylhexyl sulfosuccinate are added and stirred evenly.

[0033] Example 2 A composition comprising the following components in parts by weight: 5 parts sodium diethylhexyl sulfosuccinate, 2 parts polyglycerol-10 stearate, 15 parts disodium cocoyl glutamate and 15 parts sodium methyl cocoyl taurate.

[0034] The preparation method of the composition in this embodiment is as follows: polyglycerol-10 stearate and disodium cocoyl glutamate are mixed, stirred, heated to 65°C, and then sodium methyl cocoyl taurate and sodium diethylhexyl sulfosuccinate are added and stirred evenly.

[0035] Example 3 A composition comprising the following components in parts by weight: 3 parts sodium diethylhexyl sulfosuccinate, 3 parts polyglycerol-10 stearate, 10 parts disodium cocoyl glutamate, and 20 parts sodium methyl cocoyl taurate.

[0036] The preparation method of the composition in this embodiment is the same as that in Example 1.

[0037] Example 4 A composition comprising the following components in parts by weight: 3 parts sodium diethylhexyl sulfosuccinate, 1 part polyglycerol-10 stearate, 9 parts disodium cocoyl glutamate, and 15 parts sodium methyl cocoyl taurate.

[0038] The preparation method of the composition in this embodiment is the same as that in Example 1.

[0039] Example 5 A composition comprising the following components in parts by weight: 8 parts sodium diethylhexyl sulfosuccinate, 3 parts polyglycerol-10 stearate, 18 parts disodium cocoyl glutamate, and 30 parts sodium methyl cocoyl taurate.

[0040] The preparation method of the composition in this embodiment is the same as that in Example 1.

[0041] Comparative Examples 1-4 The difference from Example 1 is that Comparative Examples 1-4 all use the same component, as shown in Table 1.

[0042] Table 1

[0043] Comparative Example 5 Compared with Example 1, the difference is that the composition of this comparative example does not include sodium diethylhexyl sulfosuccinate, while the other components, dosages and preparation methods are the same as in Example 1.

[0044] Comparative Example 6 Compared with Example 1, the difference is that the composition of this comparative example does not include polyglycerol-10 stearate, while the other components, amounts and preparation methods are the same as in Example 1.

[0045] Comparative Example 7 Compared with Example 1, the difference is that the composition of this comparative example does not include disodium cocoyl glutamate, while the other components, dosages and preparation methods are the same as in Example 1.

[0046] Comparative Example 8 Compared with Example 1, the difference is that the composition of this comparative example does not include sodium methylcocoyl taurate, while the other components, dosages and preparation methods are the same as in Example 1.

[0047] Comparative Example 9 Compared with Example 1, the difference is that sodium diethylhexyl sulfosuccinate was replaced in equal amounts with sodium dodecylbenzenesulfonate, which is also an anionic surfactant. Other components, amounts added, and preparation methods are the same as in Example 1.

[0048] Comparative Example 10 Compared with Example 1, the difference is that in Comparative Example 10, polyglycerol-10 stearate is replaced in equal amounts with cocamide MEA, which is also a nonionic surfactant. The other components, amounts added, and preparation methods are the same as in Example 1.

[0049] Comparative Example 11 Compared with Example 1, the difference is that in Comparative Example 11, disodium cocoyl glutamate is replaced by sodium lauroyl glutamate, which is also an amino acid surfactant, in equal amounts. Other components, amounts added, and preparation methods are the same as in Example 1.

[0050] Compared with Example 1, Comparative Example 12 differs in that sodium methyl cocoyl taurate is replaced in equal amounts with sodium cocoyl aminopropionate, which is also an amino acid surfactant. Other components, amounts added, and preparation methods are the same as in Example 1.

[0051] Comparative Example 13 Compared with Example 1, the difference is that Comparative Example 13 only contains sodium diethylhexyl sulfosuccinate and polyglycerol-10 stearate, and the amount added and the preparation method are the same as those in Example 1.

[0052] Comparative Example 14 Compared with Example 1, the difference is that Comparative Example 14 only contains sodium diethylhexyl sulfosuccinate and disodium cocoyl glutamate, and the amount added and the preparation method are the same as those in Example 1.

[0053] Comparative Example 15 Compared with Example 1, the difference is that Comparative Example 15 only contains sodium diethylhexyl sulfosuccinate and sodium methyl cocoyl taurate, and the amount added and the preparation method are the same as those in Example 1.

[0054] Comparative Example 16 Compared with Example 1, the difference is that Comparative Example 16 only contains polyglycerol-10 stearate and disodium cocoyl glutamate, and the amount added and the preparation method are the same as those in Example 1.

[0055] Comparative Example 17 Compared with Example 1, the difference is that Comparative Example 17 only contains polyglycerol-10 stearate and sodium methyl cocoyl taurate, and the amount added and the preparation method are the same as those in Example 1.

[0056] Comparative Example 18 Compared with Example 1, the difference is that Comparative Example 18 only contains disodium cocoyl glutamate and sodium methyl cocoyl taurate, and the amount added and the preparation method are the same as those in Example 1.

[0057] Application Example 1 A facial cleanser comprising the composition of the present invention has the formulation shown in Table 2.

[0058] Table 2

[0059] The preparation method of the facial cleanser in Application Example 1 is as follows: Preheat phase B to 60°C, stir homogenously until dissolved, and set aside. Add phase A to the reaction vessel, and heat it to 80°C while stirring. After stirring until it is completely dissolved, start cooling. When the temperature drops to 65℃, add the reserved phase B and stir well; Continue cooling to 55℃, then add phases C, D, and E, and stir until homogeneous for 30 minutes. Continue cooling to 40℃, add phase F, and stir until the paste is uniform; Continue cooling to 38℃, then degas and discharge the material.

[0060] Application Example 2 The difference from Application Example 1 is that the mass percentage of the composition in Example 1 is adjusted to 20%, while the other components, amounts and preparation methods are the same as in Application Example 1.

[0061] Application Example 3 The difference from Application Example 1 is that the mass percentage of the composition in Example 1 is adjusted to 50%, while the other components, amounts and preparation methods are the same as in Application Example 1.

[0062] Application Example 4 The difference between Application Example 4 and Application Example 1 is that in Application Example 4, the composition of Example 1 is replaced with the composition of Example 4 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Application Example 1.

[0063] Application Example 5 The difference between Application Example 5 and Application Example 1 is that in Application Example 5, the composition of Example 1 is replaced with the composition of Example 5 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Application Example 1.

[0064] Application Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 replaces the composition of Example 1 with the composition of Comparative Example 1 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0065] Application Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that Comparative Example 2 replaces the composition of Example 1 with the composition of Comparative Example 2 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0066] Application Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that Comparative Example 3 replaces the composition of Example 1 with the composition of Comparative Example 3 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0067] Application Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that Comparative Example 4 replaces the composition of Example 1 with the composition of Comparative Example 4 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0068] Application Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that Comparative Example 5 replaces the composition of Example 1 with the composition of Comparative Example 5 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0069] Application Comparative Example 6 The difference between Comparative Example 6 and Example 1 is that Comparative Example 6 replaces the composition of Example 1 with the composition of Comparative Example 6 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0070] Application Comparative Example 7 The difference between Comparative Example 7 and Example 1 is that Comparative Example 7 replaces the composition of Example 1 with the composition of Comparative Example 7 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0071] Application Comparative Example 8 The difference between Comparative Example 8 and Example 1 is that Comparative Example 8 replaces the composition of Example 1 with the composition of Comparative Example 8 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0072] Application Comparison Example 9 The difference between Comparative Example 9 and Example 1 is that Comparative Example 9 replaces the composition of Example 1 with the composition of Comparative Example 9 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0073] Application Comparison Example 10 The difference between Comparative Example 10 and Example 1 is that Comparative Example 10 replaces the composition of Example 1 in equal amounts with the composition of Comparative Example 10, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0074] Application Comparative Example 11 The difference between Comparative Example 11 and Example 1 is that Comparative Example 11 replaces the composition of Example 1 in equal amounts with the composition of Comparative Example 11, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0075] Application Comparative Example 12 The difference between Comparative Example 12 and Example 1 is that Comparative Example 12 replaces the composition of Example 1 in equal amounts with the composition of Comparative Example 12, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0076] Application Comparative Example 13 The difference between Comparative Example 13 and Example 1 is that Comparative Example 13 replaces the composition of Example 1 in equal amounts with the composition of Comparative Example 13, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0077] Application Comparative Example 14 The difference between Comparative Example 14 and Example 1 is that Comparative Example 14 replaces the composition of Example 1 in equal amounts with the composition of Comparative Example 14, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0078] Application Comparative Example 15 The difference between Comparative Example 15 and Example 1 is that Comparative Example 15 replaces the composition of Example 1 in equal amounts with the composition of Comparative Example 15, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0079] Application Comparative Example 16 The difference between Comparative Example 16 and Example 1 is that Comparative Example 16 replaces the composition of Example 1 with the composition of Comparative Example 16 in equal amounts, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0080] Application Comparative Example 17 The difference between Comparative Example 17 and Example 1 is that Comparative Example 17 replaces the composition of Example 1 in equal amounts with the composition of Comparative Example 17, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0081] Application Comparison Example 18 The difference between Comparative Example 18 and Example 1 is that Comparative Example 18 replaces the composition of Example 1 in equal amounts with the composition of Comparative Example 18, while the other components, amounts added, and preparation methods are the same as in Example 1.

[0082] Product effectiveness test Test Example 1: Product Stability Test 1.1: High and Low Temperature Stability Test The facial cleansers prepared using Examples 1-5 and Comparative Examples 1-18 were used as test samples. The heat resistance and cold resistance of the samples were tested using the high and low temperature cycling test method according to GB / T29680. The cold resistance temperatures were (-15±2)℃ and (-8±2)℃, the heat resistance temperatures were (48±1)℃ and (40±1)℃, and the room temperature was (25±2)℃. The stability of the products was observed at 24h, 3 days, 7 days, 14 days, 28 days, 45 days, 60 days, 90 days, 120 days, and 160 days. The specific stability test results are shown in Table 3 below.

[0083] Table 3. Results of sample stability tests at different temperatures

[0084] Table 3 shows that the facial cleansers prepared using Examples 1-5, Comparative Examples 1, 2, and 13 remained relatively stable for 160 days under both high and low temperatures. However, the facial cleansers prepared using other comparative examples exhibited varying degrees of solid or flocculent precipitation at different times under low temperatures. Without the combination of sodium diethylhexyl sulfosuccinate and polyglycerol-10 stearate, the addition of sodium methylcocoyl taurate or disodium cocoyl glutamate makes the system unstable and prone to precipitation. Comparative Examples 1, 2, and 13 passed the high and low temperature stability tests because their formulations did not contain disodium cocoyl glutamate or sodium methylcocoyl taurate, thus having no impact on product stability. Therefore, this invention, by combining sodium diethylhexyl sulfosuccinate and polyglycerol-10 stearate, can make disodium cocoyl glutamate and sodium methylcocoyl taurate more stable in the system.

[0085] 1.2: Stability test at different pH values The facial cleansers prepared using Examples 1-5 and Comparative Examples 1-18 were used as test samples to observe their stability at different pH values. The specific stability test results are shown in Table 4 below.

[0086] Table 4. Results of sample stability tests at different pH values

[0087] Table 4 shows that Application Examples 1-5 were stable with no precipitation in the pH range of 5-10. Comparative Examples 1, 2, and 13 did not exhibit precipitation issues because they did not contain disodium cocoyl glutamate or sodium methyl cocoyl taurate. The cleansing milks prepared in other comparative examples, due to the addition of different amounts of disodium cocoyl glutamate or sodium methyl cocoyl taurate and the absence of sodium diethylhexyl sulfosuccinate and polyglycerol-10 stearate, showed varying degrees of precipitation at different pH levels, leading to system instability. Therefore, this invention, by combining sodium diethylhexyl sulfosuccinate and polyglycerol-10 stearate, makes disodium cocoyl glutamate and sodium methyl cocoyl taurate more stable in the system, broadening their application range in different systems.

[0088] Experimental Example 2: Patch Test Test substance: Cleansing milks prepared using Examples 1-5 and Comparative Examples 1-18.

[0089] Subjects: A total of 230 healthy volunteers aged 20-50 (male and female) were divided into 23 groups of 10 people each.

[0090] Test Method: Using a syringe, dispense 0.3 mL of sample into the drug chamber of the test strip. Immediately apply the test strip containing the sample longitudinally to the normal skin of the left forearm, starting from the bottom. Simultaneously, gently press each drug chamber to expel air and ensure even distribution of the test sample. Mark the test sites for observation. The blank control group consists of subjects who do not use the product.

[0091] Results Analysis: After 24 hours, the adhesive tape was removed, and skin reactions were observed at 30 minutes, 24 hours, and 48 hours. The results were recorded and analyzed according to the CTFA guidelines. The severity of adverse skin reactions is shown in Table 5, and the test results are shown in Table 6.

[0092] Table 5

[0093] Table 6

[0094] As shown in Table 6, volunteers using the facial cleansers prepared in Application Examples 1-5 experienced no adverse reactions, while volunteers using the facial cleansers prepared in Comparative Examples 1-18 experienced varying degrees of skin reactions. This indicates that the surfactant combination in the formulations of this invention is gentler, less irritating, and has excellent safety. Therefore, it can be concluded that the surfactant combination of sodium diethylhexyl sulfosuccinate, polyglycerol-10 stearate, disodium cocoyl glutamate, and sodium methyl cocoyl taurate, scientifically formulated in this invention, has a synergistic effect and lower skin irritation.

[0095] Experimental Example 3: Foam Richness Test The facial cleansers prepared using Examples 1-5 and Comparative Examples 1-18 were used as test samples. The richness of the foam in the samples was tested using a SITA foam analyzer. The unique foam-generating blades of the SITA foam analyzer can control the amount of air drawn in, reproducing the foam formation process. Combined with the measurement system, the foam can be objectively evaluated. The sample was prepared into a 0.15wt% test solution using 150ppm hard water. The test liquid was then poured into the sample tank of the SITA foam analyzer. The rotation speed was set to 900rpm, the time to 1h, and the sample temperature to 40℃. The SITA foam analyzer was then started, and the foam analyzer automatically recorded the change in foam volume. The specific test results are shown in Table 7 below.

[0096] Table 7 Statistical results of foam volume in samples

[0097] Table 7 shows that the facial cleansers prepared in Application Examples 1-5, compared to those in Comparative Examples 1-18, exhibited higher foam production at various time intervals (30s, 3min, 5min, and 1h). This indicates that the facial cleansers prepared in the application examples produced faster foaming, richer foam, and maintained foam for a longer period. Therefore, this demonstrates that the combination of sodium diethylhexyl sulfosuccinate, polyglycerol-10 stearate, disodium cocoyl glutamate, and sodium methyl cocoyl taurate has a synergistic effect on foam production, providing richer and more stable foam.

[0098] Experiment 4: Sunscreen Removal Effect Test substances: facial cleansers prepared using Examples 1-5 and Comparative Examples 1-18.

[0099] Test Method: Twenty-three healthy volunteers aged 20-50 (male or female) were selected. A 5x5cm square was drawn on the inside of their arms, with marks made at the four corners. Sunscreen (commercially available product: Earth-Crust Waterproof Protective Physical Sunscreen W) was applied completely inside the square. After the sunscreen formed a film, it was washed off using the test substance (sunscreen, washing intensity and time were consistent). Photos were taken using a UV camera to observe the residue of the sunscreen, thus comparing the sunscreen removal performance. The sunscreen removal effect was evaluated as follows: Strong: Very clean, with no fluorescent reflection; Excellent: Multiple images from different angles revealed a slight fluorescence emission. Good: There is a slight fluorescent reflection; Generally: Fluorescence fades, but is still visible; Poor: Compared to not cleaning, there is basically no removal.

[0100] The test results are shown in Table 8.

[0101] Table 8 Sunscreen Removal Effect

[0102] Table 8 shows that, compared to Comparative Examples 1-18, the facial cleansers prepared in Examples 1-5 removed sunscreen more effectively, removing it very cleanly without any fluorescent reflection. Comparative Examples 7-8 and 11-13, when photographed from multiple angles, exhibited slight fluorescent emission due to the addition of sodium diethylhexyl sulfosuccinate and polyglycerol-10 stearate. Comparative Examples 5, 6, 9-10, and 14-17, although also containing sodium diethylhexyl sulfosuccinate or polyglycerol-10 stearate, still showed slight fluorescent reflection or reduced fluorescence, though still visible. Comparative Examples 1-2, although also containing sodium diethylhexyl sulfosuccinate or polyglycerol-10 stearate, used only a single surfactant, resulting in poor performance; compared to no rinsing, almost no sunscreen was removed. Comparative Examples 3-4 and 18, which did not contain sodium diethylhexyl sulfosuccinate or polyglycerol-10 stearate, showed very poor removal of sunscreen products, with virtually no removal compared to not rinsing. This indicates that the combination of sodium diethylhexyl sulfosuccinate, polyglycerol-10 stearate, disodium cocoyl glutamate, and sodium methyl cocoyl taurate results in a very strong effect in removing sunscreen products.

[0103] Experimental Example 5: Determination of Skin Stratum Corneum Moisture Content Test substances: facial cleansers prepared using Examples 1-5 and Comparative Examples 1-18.

[0104] Test method: 230 volunteers were selected from the patch test in Experiment Example 2 (10 volunteers used the same sample). The subjects used the product to wash their face once in the morning and once in the evening. Before use and on the 7th day of use, under the conditions of temperature 21±1℃ and humidity 60±10%, the subjects cleaned their face and waited for 20 minutes before measuring the facial moisture content. The overall effect of the product on human skin moisturizing efficacy was evaluated.

[0105] Moisture content change rate: This refers to the rate of change in skin moisture content after product use compared to before use. A positive value indicates an increase in moisture content and improved skin hydration, while a negative value indicates a decrease in moisture content and reduced skin hydration.

[0106] The test results are shown in Table 9.

[0107] Table 9. Results of Moisture Content Analysis

[0108] As shown in Table 9, when subjects used the facial cleansers prepared in Examples 1-5 without applying other skincare products, the moisture content significantly increased after 7 days of use, all showing positive values. However, in Comparative Examples 1-18, where no composition of the present invention was added, or where a single ingredient, two or three of the ingredients of the present invention were added, or where other similar raw materials were used as substitutes, the moisture content significantly decreased after 7 days of use, all showing negative values. This indicates that the scientific combination of sodium diethylhexyl sulfosuccinate, polyglycerol-10 stearate, disodium cocoyl glutamate, and sodium methyl cocoyl taurate has excellent affinity and significantly improves the moisturizing effect.

[0109] Experimental Example 6: Consumer Evaluation Test substances: facial cleansers prepared using Examples 1-5 and Comparative Examples 1-18.

[0110] Subjects: 230 volunteers in the patch test of Case 2.

[0111] Test method: Subjects used the product to wash their face once on the spot. One hour later, they evaluated their skin condition after using the product through a questionnaire. The questionnaire included six aspects of evaluation: no tightness after washing, skin became more moisturized, improvement in skin irritation, reduction in facial sebum secretion and deposition, richness of foam, and personal preference. A full score of 10 was used for the evaluation standard. Volunteers scored according to their own experimental experience. The higher the score, the stronger the characteristic of the item. The average value of the obtained data was used as the result for analysis.

[0112] The results of the survey questionnaire are shown in Table 10 below.

[0113] Table 10 Summary of Survey Questionnaire Results

[0114] The results in Table 10 show that the facial cleansers prepared in Examples 1-5 scored higher than those in Comparative Examples 1-18 in all evaluation items, indicating that their effects on skin moisturizing, soothing, and foaming were recognized by the volunteers. Combined with other test results, the composition of this invention has a strong effect in removing sunscreen, has moisturizing effects, is very compatible with the skin, is gentle and non-irritating, and brings a soft and refreshing feeling to the skin, and is more stable.

[0115] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A composition, characterized in that, The composition comprises, by weight parts, the following components: 0.5-20 parts of sodium diethylhexyl sulfosuccinate, 0.1-8 parts of polyglycerol-10 stearate, 0.5-40 parts of disodium cocoyl glutamate, and 0.5-45 parts of sodium methyl cocoyl taurate.

2. The composition according to claim 1, characterized in that, The composition comprises, by weight parts, the following components: 0.5-12 parts of sodium diethylhexyl sulfosuccinate, 0.1-6 parts of polyglycerol-10 stearate, 0.5-30 parts of disodium cocoyl glutamate, and 0.5-40 parts of sodium methyl cocoyl taurate.

3. The composition according to claim 2, characterized in that, The composition comprises, by weight parts, the following components: 3-8 parts sodium diethylhexyl sulfosuccinate, 1-3 parts polyglycerol-10 stearate, 9-18 parts disodium cocoyl glutamate, and 15-30 parts sodium methyl cocoyl taurate.

4. A method for preparing the composition according to any one of claims 1-3, characterized in that, Includes the following steps: The components are mixed to obtain the composition.

5. The preparation method according to claim 4, characterized in that, Includes the following steps: Polyglycerol-10 stearate and disodium cocoyl glutamate were mixed, stirred, and heated to 60-65°C. Then, sodium methyl cocoyl taurate and sodium diethylhexyl sulfosuccinate were added and stirred homogenously to obtain the composition.

6. The use of the composition according to any one of claims 1-3 in the preparation of skin cleansing products.

7. A skin cleansing product, characterized in that, The skin cleansing product includes the composition according to any one of claims 1-3.

8. The skin cleansing product according to claim 7, characterized in that, The composition is present in the skin cleansing product at a mass content of 1%-80%.

9. The skin cleansing product according to claim 7, characterized in that, The pH of the skin cleansing product is 5-10.

10. The skin cleansing product according to claim 7, characterized in that, The skin cleansing products include facial cleansers, cleansing creams, cleansing gels, or cleansing mousses.

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