A skin cleansing composition, its preparation method and application

Abstract

The present disclosure provides a skin cleansing composition, a preparation method thereof and an application thereof, belonging to the technical field of washing and care products. The skin cleansing composition of the present disclosure uses preservative 9010 as a preservative and combines it with a specific surfactant, methyl monoethanolamide cocoate. The two interact with each other, improving the foaming performance and detergency of the skin cleansing composition while reducing the irritation of the skin cleansing composition, achieving the effect of deep cleansing. The skin cleansing composition of the present disclosure combines preservative 9010, surfactant methyl monoethanolamide cocoate and suspending agent Carbopol U21. The three act together to ensure the mildness and detergency of the skin cleansing composition while improving the moisturizing performance of the skin cleansing composition, ensuring that the skin remains moisturized after cleansing.

Description

Technical Field

[0001] The present disclosure relates to the technical field of cosmetics, and particularly to a skin cleansing composition, a preparation method thereof, and an application thereof. Background Art

[0002] Cleaning products are one of the daily chemical products that people come into contact with the most in their daily lives. Their main components include water, humectants, surfactants, thickeners, preservatives, etc. With the improvement of people's living standards, people pay more and more attention to the formulation, irritation, and cleaning degree of various cleaning products that come into contact with the human body. Therefore, streamlining the formulation, reducing irritation and toxic side effects, and improving cleaning ability are the current and future development trends of washing and care products. Currently, personal washing and care products have strong cleaning power but poor moisturizing and soothing effects, low mildness, and are prone to causing skin allergies or stinging; mild washing and care products have weak cleaning power and cannot achieve the effect of deep cleaning.

[0003] Therefore, there is an urgent need to develop a skin cleansing composition with high cleaning power, low irritation, and a moisturizing effect to solve the above problems. Summary of the Invention

[0004] The purpose of the present disclosure is to overcome the deficiencies of the prior art and provide a skin cleansing composition, a preparation method thereof, and an application thereof. The skin cleansing composition has the advantages of high cleaning power, high foaming property, low irritation, and a moisturizing effect on the skin.

[0005] To achieve the above purpose, the technical solution adopted by the present disclosure is: In the first aspect, a skin cleansing composition is provided, which includes the following components in parts by weight: 3 - 4 parts of methyl monoethanolamide cocoate, 0.4 - 1.1 parts of preservative 9010, 0.01 - 0.10 parts of carbomer, 0.11 - 0.53 parts of octadecyl trimethyl ammonium chloride, 3.98 - 4.32 parts of cocoamidopropyl betaine, 16.7 - 17.4 parts of sodium laureth sulfate, 1.8 - 2.2 parts of sodium dodecyl sulfate, 3.97 - 8.02 parts of fatty alcohol polyoxyethylene ether, 0.96 - 1.44 parts of emulsifying silicone oil, 2.21 - 2.65 parts of dimethicone alcohol.

[0006] In some embodiments, the mass ratio of methyl monoethanolamide cocoate to preservative 9010 is 3.2 - 3.7:0.4 - 0.9.

[0007] In some embodiments, the total mass ratio of methyl monoethanolamide cocoate and preservative 9010 to carbomer is 3.9 - 4.5:0.03 - 0.07.

[0008] In some embodiments, the skin cleansing composition further comprises the following components in parts by weight: 0.32 - 0.78 parts of a thickener, 1.35 - 1.72 parts of a humectant, 0.32 - 0.65 parts of a sunscreen, 0.11 - 0.53 parts of a fragrance, and 0.1 - 1 part of a pH regulator.

[0009] In some embodiments, the thickener is at least one of cationic guar gum, sodium chloride, gelatin, and sodium alginate.

[0010] In some embodiments, the humectant is at least one of glycerol, urea, D-panthenol, erythritol, and trehalose.

[0011] In some embodiments, the pH regulator is at least one of citric acid, sodium citrate, arginine, sodium hydroxide, potassium hydroxide, and tromethamine.

[0012] In some embodiments, the sunscreen is at least one of titanium dioxide, zinc oxide, ethylhexyl methoxycinnamate, and a copolymer of styrene / acrylic acid emulsion (OP301).

[0013] On the other hand, a method for preparing the skin cleansing composition is provided, comprising the following steps:

[0014] (1) After heating and dissolving the thickener, carbomer, sodium laureth sulfate, and sodium dodecyl sulfate are added, and the mixture is heated and stirred evenly to obtain Solution A;

[0015] (2) After mixing dimethicone alcohol and emulsifying silicone oil evenly, Solution A, cocamidopropyl betaine, and methyl cocoyl monoethanolamide are added, and the mixture is heated and stirred evenly to obtain Solution B;

[0016] (3) Octadecyl trimethyl ammonium chloride and fatty alcohol polyoxyethylene ether are added to Solution B, and the mixture is heated and stirred evenly, and then cooled to obtain Solution C;

[0017] (4) A preservative 9010, a fragrance, a sunscreen, and a humectant are added to Solution C, and the mixture is stirred evenly, and then a pH regulator is added and stirred evenly to obtain the skin cleansing composition.

[0018] On yet another aspect, an application of the skin cleansing composition in preparing washing and care products is provided.

[0019] Compared with the prior art, the beneficial effects of the present disclosure are as follows: The present disclosure uses preservative 9010 as the preservative and combines it with the specific surfactant methyl cocoyl monoethanolamide. The two interact with each other, improving the foaming performance and detergency of the skin cleansing composition while reducing the irritation of the skin cleansing composition, achieving the effect of deep cleansing. Secondly, the skin cleansing composition of the present disclosure combines preservative 9010, surfactant methyl cocoyl monoethanolamide, and carbomer. The three act together to ensure the mildness and detergency of the skin cleansing composition while improving the moisturizing performance of the skin cleansing composition, ensuring that the skin remains moisturized and non-tight after cleansing. Description of the Drawings

[0020] Figure 1 It is the external view of the cleansing gel obtained in Example 1. Detailed Description of the Embodiments

[0021] For the convenience of understanding the present disclosure, the present disclosure will be described more comprehensively below. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosed content of the present disclosure more thorough and comprehensive.

[0022] For simplicity, the present disclosure only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form a range not explicitly recited; and any lower limit can be combined with other lower limits to form a range not explicitly recited, and similarly any upper limit can be combined with any other upper limit to form a range not explicitly recited. In addition, although not explicitly recited, each point or single value between the range endpoints is included in the range. Thus, each point or single value can be used as its own lower or upper limit and combined with any other point or single value or combined with other lower or upper limits to form a range not explicitly recited.

[0023] 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 disclosure belongs. The terms used in the specification of the present disclosure herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. It should be noted that unless otherwise stated, the term "and / or" used herein includes any and all combinations of one or more of the related listed items, "above" and "below" include the recited number, and "one or more" means two or more in "one or more".

[0024] The foregoing application content of the present disclosure does not intend to describe every disclosed embodiment or every implementation mode in the present disclosure. The following description more specifically illustrates exemplary embodiments. Throughout the application, guidance is provided through a series of embodiments, which can be used in various combinations. In each instance, the listings are only representative groups and should not be construed as exhaustive.

[0025] To solve the problem that the cleaning performance and mild performance of cleaning products in the prior art cannot be both achieved.

[0026] In a first aspect of the present disclosure, there is provided a skin cleansing composition, comprising the following components in parts by weight: 3 - 4 parts of methyl monoethanolamide cocoate, 0.4 - 1.1 parts of preservative 9010, 0.01 - 0.10 parts of carbomer, 0.11 - 0.53 parts of octadecyl trimethyl ammonium chloride, 3.98 - 4.32 parts of cocoamidopropyl betaine, 16.7 - 17.4 parts of sodium laureth sulfate, 1.8 - 2.2 parts of sodium dodecyl sulfate, 3.97 - 8.02 parts of fatty alcohol polyoxyethylene ether, 0.96 - 1.44 parts of emulsifying silicone oil, 2.21 - 2.65 parts of dimethyl siloxanol.

[0027] The present disclosure uses preservative 9010 as a preservative in a skin cleansing composition, and combines it with a specific surfactant, methyl monoethanolamide cocoate. The two interact with each other, improving the foaming performance and detergency of the skin cleansing composition while reducing the irritation of the skin cleansing composition, achieving the effect of deep cleansing without irritating the skin. Preservative 9010 is a liquid cosmetic preservative composed of phenoxyethanol and ethylhexylglycerin. Ethylhexylglycerin affects the surface tension on the microbial cell membrane, thereby enhancing the preservative ability of phenoxyethanol. It has a broad-spectrum and balanced inhibitory effect on bacteria, yeasts, and molds, is not easily hydrolyzed, has good tolerance to temperature and pH value, and has good solubility. It can be well dispersed in various systems even at low temperatures. The surfactant methyl monoethanolamide cocoate belongs to a new type of liquid non-ionic surfactant and has good chemical stability. Due to the presence of amide bonds in its molecules, it has excellent dispersion and solubilization properties within a wide pH range. During the cleaning process, the main function of the surfactant methyl monoethanolamide cocoate is to reduce the surface tension of the liquid, making it easier for skin dirt to be dispersed and removed. It can form micelle structures between water and oil, thereby aggregating oil stains and rinsing them away with water. The combination of methyl monoethanolamide cocoate and preservative 9010 can improve the efficiency of the hydrophobic groups in the molecular structure of the non-ionic surfactant interacting with oil to form micelles, making it easier for oil particles to be suspended in the solution. At the same time, it speeds up the rate of the hydrophilic groups of the surfactant forming hydrogen bonds with water molecules, improves the stability of the solution, enhances the detergency and dirt dispersibility of the cleaning product, promotes foam stability, further improves the cleaning effect of the product, and thus improves the detergency of the product. In addition, the surfactant methyl monoethanolamide cocoate specifically binds to preservative 9010, and the synergistic effect of the two can reduce the irritation of the cleaning product to the skin, with high safety, achieving the effect of mild and non-irritating ingredients in the cleaning product. Secondly, carbomer can interact with ions in water to form stable complexes, thereby preventing the influence of ions on other components. The formation of this complex also helps to maintain the texture and performance of the skin cleansing composition, improving the cleaning effect and stability of the skin cleansing composition; adding carbomer to the skin cleansing composition can reduce the irritation and damage of irritating substances in the skin cleansing composition to the skin and mucous membranes, and can also work together with methyl monoethanolamide cocoate and preservative 9010 to help the skin lock in moisture, keep it moisturized, and improve the moisturizing property.

[0028] Specifically, the weight parts of the methyl monoethanolamide cocoate can be, but are not limited to, 3 parts, 3.2 parts, 3.4 parts, 3.6 parts, 3.8 parts, 4 parts.

[0029] Specifically, the weight parts of the preservative 9010 can be, but are not limited to, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, 1.1 parts.

[0030] Specifically, the parts by weight of the carbomer can be 0.01 part, 0.02 part, 0.03 part, 0.04 part, 0.05 part, 0.06 part, 0.07 part, 0.08 part, 0.09 part, 0.10 part.

[0031] Specifically, the parts by weight of the octadecyl trimethyl ammonium chloride can be, but are not limited to, 0.11 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.53 part.

[0032] Specifically, the parts by weight of the cocamidopropyl betaine can be, but are not limited to, 3.98 parts, 4 parts, 4.05 parts, 4.1 parts, 4.15 parts, 4.2 parts, 4.25 parts, 4.3 parts, 4.32 parts.

[0033] Specifically, the parts by weight of the sodium lauryl polyether sulfate can be, but are not limited to, 16.7 parts, 16.8 parts, 16.9 parts, 17 parts, 17.1 parts, 17.2 parts, 17.3 parts, 17.4 parts.

[0034] Specifically, the parts by weight of the sodium dodecyl sulfate can be, but are not limited to, 1.8 parts, 1.85 parts, 1.9 parts, 1.95 parts, 2 parts, 2.05 parts, 2.1 parts, 2.15 parts, 2.2 parts.

[0035] Specifically, the parts by weight of the fatty alcohol polyoxyethylene ether can be, but are not limited to, 3.97 parts, 4.2 parts, 4.5 parts, 4.7 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.2 parts, 7.5 parts, 7.8 parts, 8 parts.

[0036] Specifically, the parts by weight of the emulsifying silicone oil can be, but are not limited to, 0.96 part, 1 part, 1.05 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.35 parts, 1.4 parts, 1.44 parts.

[0037] Specifically, the parts by weight of the dimethyl siloxane alcohol can be, but are not limited to, 2.21 parts, 2.25 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.55 parts, 2.61 parts.

[0038] As an example of the carbomer, U21 can be cited.

[0039] In some embodiments, the mass ratio of the methyl monoethanol amide of coconut fatty acid to the preservative 9010 is 3.2 - 3.7:0.4 - 0.9; for example, it can be, but is not limited to, 3.2:0.9, 3.3:0.8, 3.4:0.7, 3.5:0.6, 3.6:0.5, 3.7:0.4.

[0040] In the present disclosure, the mass ratio of coconut fatty acid methyl monoethanolamide to preservative 9010 affects the foaming property, detergency, and irritation of the skin cleansing composition. If the content of coconut fatty acid methyl monoethanolamide is relatively high or the content of preservative 9010 is relatively low, the foaming property and detergency of the skin cleansing composition decrease, and the irritation increases. If the content of coconut fatty acid methyl monoethanolamide is relatively low or the content of preservative 9010 is relatively high, the foaming property and detergency of the skin cleansing composition decrease, and the irritation increases.

[0041] In some embodiments, the mass ratio of the total mass of coconut fatty acid methyl monoethanolamide and preservative 9010 to the mass of carbomer is 3.9 - 4.5:0.03 - 0.07; for example, it can be but is not limited to 3.9:0.07, 4:0.06, 4.1:0.05, 4.2:0.04, 4.5:0.03.

[0042] Within the above range, the skin cleansing composition has better detergency, mildness, and moisturizing property.

[0043] In the present disclosure, the skin cleansing composition further optionally contains components commonly used in cosmetics, including, for example, any components known in the art such as vehicles, active ingredients, film formers, and excipients, etc. These are known to those skilled in the art, and the types and amounts thereof can be specifically selected according to needs.

[0044] The vehicle can be a diluent, dispersant, or carrier, etc. All vehicles are known in the art, and those skilled in the art can select the types and amounts thereof according to needs. The vehicle includes, for example, water, ethanol, dipropylene glycol, polyhydroxystearic acid, and the like. In the skin cleansing composition of the present invention, the vehicle generally accounts for about 50 - 70% of the total weight of the commonly used components.

[0045] The active ingredients include, for example, emollients, humectants, skin conditioners, etc.

[0046] The skin conditioner can be any type known in the art, and it has effects such as moisturizing, anti-wrinkle, freckle removal, acne treatment, oil control, etc.

[0047] In some embodiments, the skin cleansing composition further includes the following components in parts by weight: 0.32 - 0.78 parts of thickener, 1.35 - 1.72 parts of humectant, 0.32 - 0.65 parts of sunscreen agent, 0.11 - 0.53 parts of essence, 0.1 - 1 part of pH regulator.

[0048] Specifically, the parts by weight of the thickener can be but are not limited to 0.32 parts, 0.35 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.72 parts, 0.75 parts, 0.78 parts.

[0049] Specifically, the weight parts of the moisturizer can be, but are not limited to, 1.35 parts, 1.38 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.62 parts, 1.65 parts, 1.67 parts, 1.72 parts.

[0050] Specifically, the weight parts of the sunscreen can be, but are not limited to, 0.32 parts, 0.35 parts, 0.4 parts, 0.5 parts, 0.55 parts, 0.6 parts, 0.63 parts, 0.65 parts.

[0051] Specifically, the weight parts of the fragrance can be, but are not limited to, 0.11 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, 0.53 parts.

[0052] Specifically, the weight parts of the pH regulator can be, but are not limited to, 0.1 parts, 0.3 parts, 0.5 parts, 0.7 parts, 0.9 parts, 1 part.

[0053] In some embodiments, the thickener is at least one of cationic guar gum, sodium chloride, gelatin, and sodium alginate.

[0054] In some embodiments, the moisturizer is at least one of glycerol, urea, D-panthenol, erythritol, and trehalose.

[0055] In some embodiments, the pH regulator can be any type of pH regulator commonly used in cosmetics, and examples thereof include, but are not limited to, citric acid, sodium citrate, arginine, sodium hydroxide, potassium hydroxide, tromethamine, etc. Those skilled in the art can specifically select its type and dosage according to needs.

[0056] In some embodiments, the sunscreen is at least one of titanium dioxide, zinc oxide, ethylhexyl methoxycinnamate, and copolymer of styrene / acrylic acid emulsion (OP301).

[0057] In some embodiments, the pH of the skin cleansing composition is 6.5 - 7.5, and for example, it can be, but is not limited to, 6.5, 6.7, 7.0, 7.2, 7.5.

[0058] The skin cleansing composition of the present invention can be prepared by any suitable method known in the art. For example, equipment such as dissolution tanks, emulsifying kettles, dispersers, and transfer pumps commonly used in the cosmetics field can be used to prepare it according to the processes known in the art. For example, water-soluble substances can be first put into the water-phase dissolution kettle, and oil-soluble substances (such as oils and fats) can be put into the oil-phase dissolution kettle. The temperatures of the two kettles are heated to about 80°C respectively. For raw materials that are prone to caking, they can be pre-dispersed with a disperser first; they can be dispersed with a suitable solvent and dispersant and then homogenized for 5-10 minutes, and then the oil phase is added and homogenized again for 5-10 minutes; after the homogenization is completed, the oil phase and the water phase are delivered to the emulsifying kettle for homogenization and emulsification for about 5-15 minutes; after the emulsification is completed, the temperature of the material is lowered to room temperature. Optionally, essence, preservatives, etc. are added, and the pH of the product is adjusted as needed; after the relevant test indicators are qualified, it can be filled and discharged.

[0059] The above preparation process is only illustrative, and those skilled in the art can increase, decrease, or adjust according to the dosage form requirements to prepare various dosage forms such as sprays, emulsions, gels / gels, creams, etc.

[0060] Specifically, the preparation method of the skin cleansing composition of the present disclosure includes the following steps:

[0061] (1) After heating and dissolving the thickener, carbomer, sodium laureth sulfate, and sodium dodecyl sulfate are added, and heated and stirred evenly to obtain Solution A;

[0062] (2) After mixing dimethicone alcohol and emulsifying silicone oil evenly, Solution A, cocamidopropyl betaine, and methyl monoethanolamide cocoate are added, and heated and stirred evenly to obtain Solution B;

[0063] (3) Octadecyl trimethyl ammonium chloride and fatty alcohol polyoxyethylene ether are added to Solution B, heated and stirred evenly, and then cooled to obtain Solution C;

[0064] (4) Preservative 9010, essence, sunscreen agent, and moisturizer are added to Solution C, stirred evenly, and a pH regulator is added and stirred evenly to obtain the skin cleansing composition.

[0065] In some embodiments, the heating temperature is 80-85°C, for example, it can be but not limited to 80, 81°C, 82°C, 83°C, 84°C, 85°C.

[0066] In some embodiments, the stirring speed is 100-500 r / min, for example, it can be but not limited to 100 r / min, 150 r / min, 200 r / min, 300 r / min, 400 r / min, 450 r / min, 500 r / min.

[0067] To further understand the present application, the skin cleansing composition of the present application, its preparation method and effects will be further described in detail below with reference to specific embodiments. All raw materials involved in the present application can be obtained through commercial purchase.

[0068] Examples 1-14 and Comparative Examples 1-10

[0069] The components and mass percentages of the cleansing gels of Examples 1-14 and Comparative Examples 1-10 are shown in Tables 1-3. The preparation methods of the cleansing gels of Examples 1-14 and Comparative Examples 1-10 are as follows:

[0070] (1) The mixture of the thickener and deionized water was stirred at a speed of 300 r / min until dissolved, then heated to 80 °C. During the heating process, it was continuously stirred with a blender until there was no agglomeration phenomenon. After holding for 5 min, the mixed solution A was obtained;

[0071] (2) The suspending agent Carbopol U21 was added to the mixed solution A obtained in step (1), and stirred at a speed of 300 r / min for 10 min. Then sodium lauryl ether sulfate and sodium dodecyl sulfate were added, and the temperature was heated to 82 °C. After holding for 5 min, the holding was stopped, and it was stirred at a speed of 300 r / min for 30 min to obtain the mixed solution B;

[0072] (3) The dimethicone alcohol and emulsifying silicone oil were mixed evenly, and added to the mixed solution B obtained in step (2). After stirring at a speed of 300 r / min for 30 min, cocamidopropyl betaine and methyl coconut monoethanolamide were added, and the temperature was heated to 82 °C. After holding for 5 min, the holding was stopped, and it was stirred evenly at a speed of 300 r / min to obtain the mixed solution C;

[0073] (4) Octadecyl trimethyl ammonium chloride was added to the mixed solution C obtained in step (3), and stirred at a speed of 300 r / min for 20 min. Then alcohol polyoxyethylene ether AEO9 and alcohol polyoxyethylene AEO6 were added, and stirred at a speed of 300 r / min for 35 min to obtain the mixed solution D;

[0074] (5) After the mixed solution D was stirred and cooled to 45 °C, the preservative 9010, essence, sunscreen agent and moisturizer were added, and stirred at a speed of 300 r / min for 30 min. Then citric acid was added to adjust the pH to 7 to obtain the cleansing gel.

[0075] Table 1

[0076]

[0077] Table 2

[0078]

[0079] Table 3

[0080]

[0081] Comparative Example 11

[0082] This comparative example provides a cleansing gel, which is different from the cleansing gel of Example 1 only in that: the net detergent 6501 is used to replace coconut fatty acid methyl monoethanolamide, and the other components and their dosages are the same;

[0083] The preparation method of the cleansing gel in this comparative example is the same as that of Example 1.

[0084] Comparative Example 12

[0085] This comparative example provides a cleansing gel, which is different from the cleansing gel of Example 1 only in that: the soap-based surfactant sodium myristate is used to replace coconut fatty acid methyl monoethanolamide, and the other components and their dosages are the same;

[0086] The preparation method of the cleansing gel in this comparative example is the same as that of Example 1.

[0087] Comparative Example 13

[0088] This comparative example provides a cleansing gel, which is different from the cleansing gel of Example 1 only in that: the organic amine ester TPP is used to replace coconut fatty acid methyl monoethanolamide, and the other components and their dosages are the same;

[0089] The preparation method of the cleansing gel in this comparative example is the same as that of Example 1.

[0090] Comparative Example 14

[0091] This comparative example provides a cleansing gel, which is different from the cleansing gel of Example 1 only in that: methylisothiazolinone (Kathon) is used to replace the preservative 9010, and the other components and their dosages are the same;

[0092] The preparation method of the cleansing gel in this comparative example is the same as that of Example 1.

[0093] Comparative Example 15

[0094] This comparative example provides a cleansing gel, which is different from the cleansing gel of Example 1 only in that: imidazolidinyl urea is used to replace the preservative 9010, and the other components and their dosages are the same;

[0095] The preparation method of the cleansing gel in this comparative example is the same as that of Example 1.

[0096] Comparative Example 16

[0097] This comparative example provides a cleansing gel, which is different from the cleansing gel of Example 1 only in that: butylparaben is used to replace the preservative 9010, and the other components and their dosages are the same;

[0098] The preparation method of the cleansing gel of this comparative example is the same as that of Example 1.

[0099] Comparative Example 17

[0100] This comparative example provides a cleansing gel, the difference between it and the cleansing gel of Example 1 is only that: arabic gum is used to replace carbomer U21, and the other components and their dosages are the same;

[0101] The preparation method of the cleansing gel of this comparative example is the same as that of Example 1.

[0102] Comparative Example 18

[0103] This comparative example provides a cleansing gel, the difference between it and the cleansing gel of Example 1 is only that: sodium alginate is used to replace carbomer U21, and the other components and their dosages are the same;

[0104] The preparation method of the cleansing gel of this comparative example is the same as that of Example 1.

[0105] Comparative Example 19

[0106] This comparative example provides a cleansing gel, the difference between it and the cleansing gel of Example 1 is only that: sodium carboxymethyl cellulose is used to replace carbomer U21, and the other components and their dosages are the same;

[0107] The preparation method of the cleansing gel of this comparative example is the same as that of Example 1.

[0108] Performance Test

[0109] Using the cleansing gels obtained in Examples 1-14 and Comparative Examples 1-19 as test samples, test their foaming property, detergency, irritation, and moisturizing property.

[0110] (1) Foaming property: Select 25 volunteers as judges to subjectively evaluate and score the test samples. Evaluate and score the foam of the samples from 5 points for the best foam to 1 point for the worst foam. First, each judge wets their hands at a water temperature of 37°C. The experimenter weighs 1 g of the test sample into the judge's hand. The judge rubs their hands for 1 minute to evaluate the foam. After the evaluation and scoring, wash the hands thoroughly, and repeat the previous steps for the next sample until all the test samples have been evaluated by the judges.

[0111] (2)Gentleness: Take 10 g of the test sample and place it in a transparent beaker. Add 30 ml of deionized water for dilution, then add 3 g of zein. Stir with a magnetic stirrer at a constant stirring speed of 250 rpm for 1 hour. If the zein completely dissolves during stirring, add more zein until there is undissolved zein in the solution. Then let it stand for 10 minutes, and filter the solution under normal pressure. First, measure the weight of a round filter paper with a diameter of 9 cm, then use it to collect the undissolved zein. Place the filter paper in an oven at 70 °C and dry it for 12 hours. Measure the weight of the dried filter paper and zein, and calculate the dissolved amount of zein. The less the dissolved amount of zein, the lower the irritation of the test sample to the skin, and the higher the gentleness.

[0112] Dissolved amount of zein (g) = Total amount of zein added to each test sample (g) - Weight of the filter paper (g) - Weight of the dried filter paper and zein (g).

[0113] (3)Cleansing power: Prepare a standard grease cloth of 5 cm * 5 cm, and measure its whiteness value with a whiteness meter. Take 2 soiled cloths and put them into 1 L of tap water, add 20 g of the test sample, and stir at 30 °C and a rotation speed of 120 r / min for 30 minutes. Take them out and let them dry, then measure the whiteness value again. The greater the difference in whiteness, the lower the grease content of the grease soiled cloth, and the better the oil removal ability, that is, the stronger the cleansing power.

[0114] (4)Moisturizing property: During the experiment, a total of 75 subjects were enrolled. The subjects were aged 20 - 45 years old, in good general health and without important systemic diseases. Finally, 63 subjects met the protocol and were valid cases. 50 subjects were female and 13 subjects were male, with the youngest age of 20 years old and the oldest age of 45 years old, and the average age was 30.34 ± 8.45 years old. This population was used for statistical analysis in this study. The test area of the subjects should not use any products on the day of the experiment. Before the experiment, the subjects need to clean their faces uniformly, dry them with a lint-free tissue, and sit quietly in the human efficacy evaluation room (temperature: 20 °C - 22 °C, humidity: 40% - 60%) for 30 minutes. During this period, they cannot drink water or beverages. The subjects should remain relaxed, with their faces exposed and avoid touching. Before the experiment, the subjects should be explained about the experiment and sign the informed consent form. The test area is the face. First, wet the face; squeeze an appropriate amount of cleansing gel on the forehead, the tip of the nose, and both cheeks, gently rub it open, and massage the face in a circular motion from bottom to top and from inside to outside for 1 minute, paying attention to cleaning areas such as the nose tip where dirt is likely to hide; rub it open with clean water, gently massage for half a minute, and then wash it clean. Use it once a day. During the experiment, the subjects are prohibited from using repair, soothing, and moisturizing preparations; the subjects are prohibited from taking preparations that affect the repair, soothing, and moisturizing tests by dripping, injection, oral administration, or other forms of ingestion.

[0115] After 30 minutes of facial cleansing, use the skin moisture tester Corneometer CM825 to measure the water content of the stratum corneum (D1) at the test site. The measured value before facial cleansing is used as the baseline value (D0). The tests for the same subject are completed using the same instrument and the same tester. The test site should be kept consistent before and after the two test time points. The larger the value of the water content of the stratum corneum measured by the Corneometer CM825, the higher the water content of the stratum corneum. By comparing the changes in the water content of the stratum corneum in a specific area before and after use, the effect of the product on the moisture of the stratum corneum can be reflected. The more the water content increases after using the cleansing product compared to the baseline value (D0) before use, the higher the skin water content increase rate, indicating a better improvement effect on the surface water content in the test area and proving that the product has better moisturizing properties.

[0116] The baseline value (D0) of the skin stratum corneum water content before the subject's use and the value (D1) of the skin stratum corneum water content after use are shown in Table 4. The calculation formula for the water content increase rate is as follows:

[0117] Skin water content increase rate = (Water content after using the product - Water content before using the product) / Water content before using the product × 100%; The test results are shown in Table 4.

[0118] Table 4

[0119]

[0120] From the experimental data in Table 4, it can be seen that the average foam fraction of the cleansing gel disclosed in the present application is 3.98 - 4.29 points, the zein dissolution amount is 1.14 - 1.51 g, the whiteness difference is 50 - 58, and the skin water content increase rate is 34% - 53%; indicating that the cleansing gel disclosed in the present application has the advantages of high foaming property, high cleaning power, low irritation, and moisturizing property, and can achieve the effect of deep cleansing without damaging the skin.

[0121] By comparing Example 1 with Comparative Examples 1 - 4, it can be seen that when at least one of methyl monoethanolamide cocoate, preservative 9010, and carbomer is missing in the cleansing gel, the foaming property, cleaning power, irritation, and moisturizing property of the cleansing gel decrease to varying degrees; indicating that only when methyl monoethanolamide cocoate, preservative 9010, and carbomer act synergistically can a cleansing gel with high foaming property, high cleaning power, low irritation, and good moisturizing effect be obtained.

[0122] By comparing Example 1, Examples 4-6 and Comparative Examples 5-6, it can be seen that when the mass ratio of coconut oil methyl monoethanolamide and preservative 9010 is 3.2-3.7:0.4-0.9, the foaming property and cleaning power of the obtained cleansing gel are higher, and the irritation is lower.

[0123] By comparing Example 1 with Examples 7-10 and Comparative Examples 7-10, it can be seen that when the amount of cocoyl methyl monoethanolamide or preservative 9010 is not within the scope of the present disclosure, the foaming property, cleaning power and irritation of the obtained cleansing gel cannot be achieved at the same time.

[0124] By comparing Example 1 with Examples 11-14, it can be seen that when the mass ratio of the total mass of cocoyl methyl monoethanolamide and preservative 9010 to carbomer is 3.9-4.5:0.03-0.07, the average foam score of the obtained cleansing gel is 3.98-4.29 points, the amount of zein dissolved is 1.14-1.45g, the whiteness difference is 50-58, and the skin moisture content increase rate is 29.98%-41.45%, indicating that when the mass ratio of the total mass of cocoyl methyl monoethanolamide and preservative 9010 to carbomer is within the range of 3.9-4.5:0.03-0.07, the cleaning power of the cleansing gel can be further improved and the irritation of the cleansing gel can be reduced.

[0125] By comparing Example 1 with Comparative Examples 11-19, it can be seen that the conventional surfactant or preservative compound, or the use of other substances to replace carbomer, cannot achieve the effect of the cleansing gel disclosed in the present invention. Only the compounding of coconut oil methyl monoethanolamide, preservative 9010 and carbomer can make the cleansing gel have the advantages of high foaming, high cleaning power, low irritation and good moisturizing effect.

[0126] Figure 1 This is an appearance picture of the cleansing gel obtained in Example 1. It can be seen from the picture that the cleansing gel obtained in the present invention is in a transparent gel state.

[0127] Finally, it should be noted that the above embodiments are used to illustrate the technical solution of the present disclosure rather than to limit the protection scope of the present disclosure. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present disclosure can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present disclosure.

Claims

1. A skin cleansing composition, characterized in that The invention comprises the following components in parts by weight: 3-4 parts of coconut oil methyl monoethanolamide, 0.4-1.1 parts of preservative 9010, 0.01-0.10 parts of carbomer, 0.11-0.53 parts of octadecyl trimethyl ammonium chloride, 3.98-4.32 parts of cocamidopropyl betaine, 16.7-17.4 parts of sodium fatty alcohol ether sulfate, 1.8-2.2 parts of sodium lauryl sulfate, 3.97-8.02 parts of fatty alcohol polyoxyethylene ether, 0.96-1.44 parts of emulsified silicone oil and 2.21-2.65 parts of dimethylsiloxane alcohol.

2. The skin cleansing composition according to claim 1, characterized in that The mass ratio of the coconut oil methyl monoethanolamide and the preservative 9010 is 3.2-3.7:0.4-0.

9.

3. The skin cleansing composition according to claim 1, characterized in that The mass ratio of the total mass of the coconut oil methyl monoethanolamide and the preservative 9010 to the mass of carbomer is 3.9-4.5:0.03-0.

07.

4. The skin cleansing composition according to any one of claims 1 to 3, characterized in that The skin cleaning composition further comprises the following components in parts by weight: 0.32-0.78 parts of a thickener, 1.35-1.72 parts of a moisturizer, 0.32-0.65 parts of a sunscreen, 0.11-0.53 parts of a fragrance, and 0.1-1 parts of a pH regulator.

5. The skin cleansing composition according to claim 4, characterized in that The thickener is at least one of cationic guar gum, sodium chloride, gelatin and sodium alginate.

6. The skin cleansing composition according to claim 4, characterized in that The moisturizing agent is at least one of glycerin, urea, D-panthenol, erythritol and trehalose.

7. The skin cleansing composition according to claim 4, characterized in that The pH regulator is at least one of citric acid, sodium citrate, arginine, sodium hydroxide, potassium hydroxide, and tromethamine.

8. The skin cleansing composition according to claim 4, characterized in that The sunscreen is at least one of titanium dioxide, zinc oxide, ethylhexyl methoxycinnamate, and a copolymer of liquid styrene / acrylic emulsion.

9. The method for preparing the skin cleansing composition according to any one of claims 4 to 8, characterized in that: The following steps are involved: (1) After the thickener is heated and dissolved, carbomer, sodium fatty alcohol ether sulfate, and sodium lauryl sulfate are added, and the mixture is heated and stirred to obtain solution A; (2) After the dimethiconol and the emulsified silicone oil are evenly mixed, solution A, cocamidopropyl betaine and cocoyl methyl monoethanolamide are added, and the mixture is heated and stirred evenly to obtain solution B; (3) Add octadecyltrimethylammonium chloride and fatty alcohol polyoxyethylene ether to solution B, heat and stir evenly, and cool to obtain solution C; (4) Add preservative 9010, fragrance, sunscreen and moisturizer to solution C, stir evenly, add pH adjuster and stir evenly to obtain a skin cleansing composition.

10. Use of the skin cleansing composition according to any one of claims 1 to 8 in the preparation of toiletries.

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