Skin cleaning composition as well as preparation method and application thereof

Abstract

The invention provides a skin cleaning composition as well as a preparation method and application thereof, and belongs to the technical field of wash supplies. According to the skin cleaning composition disclosed by the invention, the preservative 9010 is used as a preservative and is combined with the specific surfactant coco fatty acid methyl monoethanolamide, and the preservative 9010 and the specific surfactant coco fatty acid methyl monoethanolamide interact with each other, so that the foaming performance and the cleaning power of the skin cleaning composition are improved, the irritation of the skin cleaning composition is reduced, and the deep cleaning effect is achieved. According to the skin cleaning composition disclosed by the invention, the preservative 9010, the surfactant methyl monoethanolamide cocoate and the suspending aid carbomer U21 are combined and act together, so that the tenderness and the cleaning power of the skin cleaning composition are ensured, the moisturizing performance of the skin cleaning composition is improved, and the skin can be kept in a moist state after being cleaned.

Description

Technical Field

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

[0002] Cleaning products are one of the most common daily chemical products in people's daily life. Their main ingredients include water, moisturizers, surfactants, thickeners, preservatives, etc. With the improvement of human living standards, people are paying more and more attention to the formula, irritation and cleanliness of various cleaning products that come into contact with the human body. Therefore, streamlining the formula, reducing irritation and toxic side effects, and improving cleaning ability are the current and future development trends of cleaning products. Today's personal cleaning products have strong cleaning power, but poor moisturizing and soothing effects, low mildness, and are prone to cause skin allergies or tingling; mild cleaning products have weak cleaning power and cannot achieve the effect of deep decontamination.

[0003] Therefore, there is an urgent need to develop a skin cleaning composition with high cleaning power, low irritation and 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 and a preparation method and application thereof, wherein the skin cleansing composition has the advantages of high cleaning power and foaming property and low irritation and has a moisturizing effect on the skin.

[0005] To achieve the above-mentioned objectives, the technical scheme adopted by the present invention is as follows: in the first aspect, a skin cleansing composition is provided, comprising the following components in parts by weight: 3-4 parts of cocoyl 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 dimethicone.

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

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

[0008] In some embodiments, 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 adjuster.

[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 glycerin, urea, D-panthenol, erythritol, and trehalose.

[0011] In some embodiments, the pH adjuster 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 liquid styrene / acrylic emulsion (OP301).

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

[0014] In another aspect, provided is the use of the skin cleansing composition in preparing toiletries.

[0015] Compared with the prior art, the beneficial effects of the present disclosure are as follows: the present disclosure uses preservative 9010 as a preservative, and combines it with a specific surfactant, cocoyl methyl monoethanolamide, and the two interact with each other, while improving the foaming performance and cleaning power of the skin cleaning composition, reducing the irritation of the skin cleaning composition, and achieving a deep cleaning effect. Secondly, the skin cleaning composition of the present disclosure combines preservative 9010, the surfactant cocoyl methyl monoethanolamide and carbomer, and the three work together to ensure the mildness and cleaning power of the skin cleaning composition, while improving the moisturizing performance of the skin cleaning composition, ensuring that the skin can remain moisturized and not tight after cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the appearance of the cleansing gel obtained in Example 1. DETAILED DESCRIPTION

[0017] In order to facilitate understanding of the present disclosure, the present disclosure will be described more fully below. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present disclosure more thorough and comprehensive.

[0018] For simplicity, the present disclosure only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form an unclearly recorded range; and any lower limit can be combined with other lower limits to form an unclearly recorded range, and any upper limit can be combined with any other upper limit to form an unclearly recorded range. In addition, although not clearly recorded, each point or single value between the range endpoints is included in the range. Thus, each point or single value can be combined with any other point or single value as its own lower limit or upper limit or with other lower limits or upper limits to form an unclearly recorded range.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure 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 related listed items, and "above" and "below" include the number, and the meaning of "multiple" in "one or more" is more than two.

[0020] The above application contents of the present disclosure are not intended to describe each disclosed embodiment or each implementation in the present disclosure. The following description more specifically illustrates exemplary embodiments. In many places throughout the application, guidance is provided by a series of embodiments, which can be used in various combinations. In each example, enumeration is only used as a representative group and should not be interpreted as exhaustive.

[0021] In order to solve the problem that cleaning products in the prior art cannot have both cleaning performance and mild performance.

[0022] In a first aspect of the present disclosure, a skin cleansing composition is provided, comprising the following components in parts by weight: 3-4 parts of cocoyl 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 dimethicone.

[0023] The present disclosure uses preservative 9010 as a preservative in a skin cleaning composition, and combines a specific surfactant, coconut oil methyl monoethanolamide, and the two interact with each other, while improving the foaming performance and cleaning power of the skin cleaning composition, reducing the irritation of the skin cleaning composition, achieving the effect of deep cleaning and not irritating the skin. Preservative 9010 is a liquid preservative for cosmetics compounded with phenoxyethanol and ethylhexylglycerol. Ethylhexylglycerol affects the surface tension on the microbial cell membrane, thereby improving the antiseptic ability of phenoxyethanol, and has a broad-spectrum balanced inhibitory effect on bacteria, yeasts, and molds, and is not easy to hydrolyze, has good tolerance to temperature and pH value, and has good solubility, and can be well dispersed in various systems even at low temperatures; and the surfactant coconut oil methyl monoethanolamide belongs to a new type of liquid nonionic surfactant, has good chemical stability, and due to the presence of amide bonds in its molecules, it has excellent dispersion and solubilization performance in a wider pH range. In the cleaning process, the main function of the surfactant coconut oil methyl monoethanolamide is to reduce the surface tension of the liquid, so that skin dirt is easier to disperse and remove. They can form micelle structures between water and oil, thereby agglomerating grease stains and washing them away with water. The combination of cocoyl methyl monoethanolamide and preservative 9010 can improve the efficiency of the hydrophobic groups in the molecular structure of non-ionic surfactants to interact with grease to form micelles, making it easier for grease particles to be suspended in the solution; at the same time, it accelerates the speed at which the hydrophilic groups of the surfactants form hydrogen bonds with water molecules, improves the stability of the solution, enhances the detergency and dirt dispersibility of cleaning products, promotes foam stability, and further improves the cleaning effect of the product, thereby improving the cleaning power of the product; in addition, the surfactant cocoyl methyl monoethanolamide specifically combines with preservative 9010, and the synergistic effect of the two can reduce the irritation of cleaning products to the skin, with high safety, and achieve the effect of mild and non-irritating ingredients in cleaning products. Secondly, carbomer can interact with ions in water to form a stable complex, thereby preventing the influence of ions on other ingredients. The formation of this complex also helps to maintain the texture and performance of the skin cleansing composition, and improve the cleaning effect and stability of the skin cleansing composition. The addition of carbomer to the skin cleansing composition can reduce the irritation and damage to the skin and mucous membranes caused by irritating substances in the skin cleansing composition, and can also work together with coconut oil methyl monoethanolamide and preservative 9010 to help the skin lock in moisture, maintain moisture, and improve moisturizing properties.

[0024] Specifically, the weight proportion of the coconut acid methyl monoethanolamide can be, but is not limited to, 3 parts, 3.2 parts, 3.4 parts, 3.6 parts, 3.8 parts, or 4 parts.

[0025] Specifically, the weight proportion of the preservative 9010 may be, but is not limited to, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts, or 1.1 parts.

[0026] Specifically, the weight portion 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, or 0.10 part.

[0027] Specifically, the weight portion of the octadecyltrimethylammonium chloride may be, but is not limited to, 0.11 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, or 0.53 parts.

[0028] Specifically, the weight parts of the cocamidopropyl betaine can be but 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, and 4.32 parts.

[0029] Specifically, the weight proportion of the sodium fatty alcohol polyether sulfate may be, but is not limited to, 16.7 parts, 16.8 parts, 16.9 parts, 17 parts, 17.1 parts, 17.2 parts, 17.3 parts, or 17.4 parts.

[0030] Specifically, the weight proportion of the sodium lauryl sulfate may be, but is not limited to, 1.8, 1.85, 1.9, 1.95, 2, 2.05, 2.1, 2.15, or 2.2 parts.

[0031] Specifically, the weight parts of the fatty alcohol polyoxyethylene ether can be but 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, and 8 parts.

[0032] Specifically, the weight proportion of the emulsified silicone oil may be, but is not limited to, 0.96 parts, 1 parts, 1.05 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.35 parts, 1.4 parts, or 1.44 parts.

[0033] Specifically, the weight portion of the dimethylsiloxane alcohol may be, but is not limited to, 2.21 parts, 2.25 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.55 parts, or 2.61 parts.

[0034] As an example of carbomer, U21 may be cited.

[0035] In some embodiments, the mass ratio of the cocoyl methyl monoethanolamide and the preservative 9010 is 3.2-3.7:0.4-0.9; for example, it can be but 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.

[0036] The mass ratio of coconut acid methyl monoethanolamide and preservative 9010 in the present disclosure affects the foaming property, cleaning power and irritation of the skin cleansing composition. If the content of coconut acid methyl monoethanolamide is high or the content of preservative 9010 is low, the foaming property and cleaning power of the skin cleansing composition are reduced, and the irritation is increased; if the content of coconut acid methyl monoethanolamide is low or the content of preservative 9010 is high, the foaming property and cleaning power of the skin cleansing composition are reduced, and the irritation is increased.

[0037] In some embodiments, the mass ratio of the total mass of the cocoyl methyl monoethanolamide and the preservative 9010 to carbomer is 3.9-4.5:0.03-0.07; for example, it can be but not limited to 3.9:0.07, 4:0.06, 4.1:0.05, 4.2:0.04, 4.5:0.03.

[0038] Within the above range, the skin cleansing composition has better cleaning power, mildness and moisturizing properties.

[0039] In the present disclosure, the skin cleansing composition may further optionally contain ingredients commonly used in cosmetics, including any ingredients known in the art such as vehicles, active ingredients, film formers and excipients, which are known to those skilled in the art, and their types and amounts can be specifically selected as needed.

[0040] The vehicle can be a diluent, a dispersant or a carrier, etc. All vehicles are known in the art, and those skilled in the art can select their type and amount as needed. The vehicle includes, for example, water, ethanol, dipropylene glycol, polyhydroxystearic acid, etc. In the skin cleaning composition of the present invention, the vehicle usually accounts for about 50-70% of the total weight of the common ingredients.

[0041] Such active ingredients include, for example, emollients, moisturizers, skin conditioners, and the like.

[0042] The skin conditioning agent can be any type known in the art, and has the effects of moisturizing, anti-wrinkle, freckle removal, acne removal, oil control, etc.

[0043] In some embodiments, 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 adjuster.

[0044] Specifically, the weight portion of the thickener may be, but is 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, or 0.78 parts.

[0045] Specifically, the weight proportion of the moisturizer may be, but is 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, or 1.72 parts.

[0046] Specifically, the weight portion of the sunscreen may be, but is not limited to, 0.32 parts, 0.35 parts, 0.4 parts, 0.5 parts, 0.55 parts, 0.6 parts, 0.63 parts, or 0.65 parts.

[0047] Specifically, the weight portion of the flavor can be, but is 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, and 0.53 parts.

[0048] Specifically, the weight portion of the pH adjuster may be, but is not limited to, 0.1 part, 0.3 part, 0.5 part, 0.7 part, 0.9 part, or 1 part.

[0049] In some embodiments, the thickener is at least one of cationic guar gum, sodium chloride, gelatin, and sodium alginate.

[0050] In some embodiments, the humectant is at least one of glycerin, urea, D-panthenol, erythritol, and trehalose.

[0051] In some embodiments, the pH regulator can be any type of pH regulator commonly used in cosmetics, examples of which 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 the type and amount thereof as needed.

[0052] In some embodiments, the sunscreen is at least one of titanium dioxide, zinc oxide, ethylhexyl methoxycinnamate, and a copolymer of liquid styrene / acrylic emulsion (OP301).

[0053] In some embodiments, the pH of the skin cleansing composition is 6.5-7.5, for example, but not limited to 6.5, 6.7, 7.0, 7.2, 7.5.

[0054] The skin cleansing composition of the present invention can be prepared by any suitable method known in the art. For example, the commonly used dissolving tank, emulsifying pot, disperser, delivery pump and other equipment in the field of cosmetics can be used to prepare according to the process known in the art. For example, the water-soluble substance can be first put into the water phase dissolving pot, and the oil-soluble substance (such as grease) can be put into the oil phase dissolving pot, and the temperature of the two pots can be heated to about 80°C respectively. For raw materials that are easy to agglomerate, they can be pre-dispersed with a disperser first; after dispersing with a suitable solvent and dispersant, homogenize for 5-10 minutes, add the oil phase, and homogenize again for 5-10 minutes; after homogenization is completed, the oil phase and the water phase are delivered to the emulsifying pot for homogenization and emulsification for about 5-15 minutes; after emulsification is completed, the temperature of the material body is reduced to room temperature, and optionally, flavors, preservatives, etc. are added, and the pH of the product is adjusted as needed; after the relevant test indicators are qualified, the material can be filled and discharged.

[0055] The above preparation process is merely exemplary, and those skilled in the art can increase, decrease or adjust it according to the dosage form requirements to prepare various dosage forms such as sprays, emulsions, gels / jelly, creams, etc.

[0056] Specifically, the preparation method of the skin cleaning composition disclosed herein comprises the following steps: (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.

[0057] In some embodiments, the heating temperature is 80-85°C, for example, but not limited to 80, 81°C, 82°C, 83°C, 84°C, 85°C.

[0058] 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.

[0059] In order to further understand the present application, the skin cleansing composition of the present application, its preparation method and its effect are further described in detail below in conjunction with specific examples. All raw materials involved in the present application can be obtained through commercial purchase.

[0060] Examples 1-14 and Comparative Examples 1-10 The components and mass percentages of the cleaning gels of Examples 1-14 and Comparative Examples 1-10 are shown in Table 1-3. The preparation methods of the cleaning gels of Examples 1-14 and Comparative Examples 1-10 are as follows: (1) Stir the mixture of thickener and deionized water at a speed of 300 r / min until dissolved, heat to 80°C, and stir with a stirrer until no clumps appear during the heating period. Keep the mixture warm for 5 minutes to obtain a mixed solution A; (2) Adding the suspending agent Carbomer U21 to the mixed solution A obtained in step (1), stirring at a speed of 300 r / min for 10 min, then adding sodium fatty alcohol ether sulfate and sodium dodecyl sulfate, heating to 82° C., keeping the temperature for 5 min, stopping the heat preservation, and stirring at a speed of 300 r / min for 30 min to obtain a mixed solution B; (3) Dimethiconol and emulsified silicone oil are mixed evenly, added to the mixed solution B obtained in step (2), stirred at a speed of 300 r / min for 30 min, and then cocamidopropyl betaine and cocoyl methyl monoethanolamide are added. The mixture is heated to 82° C. and kept warm for 5 min. Then, the heat preservation is stopped and stirred evenly at a speed of 300 r / min to obtain a mixed solution C. (4) Add octadecyltrimethylammonium chloride to the mixed solution C obtained in step (3), stir at a speed of 300 r / min for 20 min, add fatty alcohol polyoxyethylene ether AEO9 and fatty alcohol polyoxyethylene AEO6, stir at a speed of 300 r / min for 35 min, and obtain a mixed solution D; (5) After the mixture D is stirred and cooled to 45°C, preservative 9010, fragrance, sunscreen and moisturizer are added. After stirring at 300 r / min for 30 min, citric acid is added to adjust the pH to 7 to obtain a cleansing gel.

[0061] Table 1 Table 2 Table 3 Comparative Example 11 This comparative example provides a cleaning gel, which differs from the cleaning gel of Example 1 only in that: detergent 6501 is used to replace coconut oil methyl monoethanolamide, and the other components and amounts are the same; The preparation method of the cleaning gel in this comparative example is the same as that in Example 1.

[0062] Comparative Example 12 This comparative example provides a cleansing gel, which differs from the cleansing gel of Example 1 only in that the soap-based surfactant sodium myristate is used to replace coconut oil methyl monoethanolamide, and the other components and amounts are the same; The preparation method of the cleaning gel in this comparative example is the same as that in Example 1.

[0063] Comparative Example 13 This comparative example provides a cleaning gel, which differs from the cleaning gel of Example 1 only in that organic amine ester TPP is used to replace coconut oil methyl monoethanolamide, and the other components and amounts are the same; The preparation method of the cleaning gel in this comparative example is the same as that in Example 1.

[0064] Comparative Example 14 The comparative example provides a cleaning gel, which differs from the cleaning gel of Example 1 only in that methylisothiazolinone (Kasson) is used to replace the preservative 9010, and the other components and amounts are the same; The preparation method of the cleaning gel in this comparative example is the same as that in Example 1.

[0065] Comparative Example 15 This comparative example provides a cleaning gel, which differs from the cleaning gel of Example 1 only in that imidazolidinyl urea is used to replace the preservative 9010, and the other components and amounts are the same; The preparation method of the cleaning gel in this comparative example is the same as that in Example 1.

[0066] Comparative Example 16 This comparative example provides a cleansing gel, which differs from the cleansing gel of Example 1 only in that butyl hydroxybenzoate is used to replace the preservative 9010, and the other components and amounts are the same; The preparation method of the cleaning gel in this comparative example is the same as that in Example 1.

[0067] Comparative Example 17 This comparative example provides a cleansing gel, which differs from the cleansing gel of Example 1 only in that gum arabic is used to replace Carbomer U21, and the other components and amounts are the same; The preparation method of the cleaning gel in this comparative example is the same as that in Example 1.

[0068] Comparative Example 18 This comparative example provides a cleansing gel, which differs from the cleansing gel of Example 1 only in that sodium alginate is used to replace carbomer U21, and the other components and amounts are the same; The preparation method of the cleaning gel in this comparative example is the same as that in Example 1.

[0069] Comparative Example 19 This comparative example provides a cleansing gel, which differs from the cleansing gel of Example 1 only in that sodium carboxymethyl cellulose is used to replace carbomer U21, and the other components and amounts are the same; The preparation method of the cleaning gel in this comparative example is the same as that in Example 1.

[0070] Performance Testing The cleansing gels obtained in Examples 1-14 and Comparative Examples 1-19 were used as test samples to test their foaming properties, cleansing power, irritation, and moisturizing properties.

[0071] (1) Foaming property: 25 volunteers were selected as judges to subjectively evaluate and score the test samples, with the foam of the samples evaluated and scored from 5 points for the best foam to 1 point for the worst foam. First, each judge wet his hands at 37°C. The experimenter weighed 1g of the test sample into the judge's hands. The judge rubbed his hands for 1 minute to evaluate the foam. After the evaluation and scoring, he washed his hands thoroughly and repeated the previous steps for the next sample until the judges completed the evaluation scores for all the test samples.

[0072] (2) Mildness: Take 10g of the test sample and put it into a transparent beaker, add 30ml of deionized water for dilution, then add 3g of zein, and stir with a magnetic stirrer at a constant stirring speed of 250rpm for 1 hour. If the zein is completely dissolved during the stirring process, add more zein until there is undissolved zein in the solution, then let it stand for 10 minutes, filter the solution under normal pressure, first measure the weight of a circular filter paper with a diameter of 9cm, then use it to collect the undissolved zein, place the filter paper in an oven at 70℃ and dry it for 12 hours, measure the weight of the filter paper and zein after drying, and calculate the amount of zein dissolved. The less the amount of zein dissolved, the less irritating the test sample is to the skin, and the milder it is.

[0073] The amount of zein dissolved (g) = the total amount of zein added to each test sample (g) - the weight of filter paper (g) - the weight of filter paper and zein after drying (g).

[0074] (3) Cleaning power: prepare a 5cm*5cm standard grease cloth, test its whiteness value with a whiteness meter, take two pieces of dirty cloth and put them into 1L of tap water, add 20g of the test sample, stir for 30 minutes at 30℃ and 120r / min, take out and dry, and test the whiteness value again. The larger the whiteness difference, the lower the grease content of the grease cloth, the better the grease removal ability, that is, the stronger the cleaning power.

[0075] (4) Moisturizing property: During the trial, a total of 75 subjects were enrolled. The subjects were aged 20 to 45 years old, in good general health and without major systemic diseases. Finally, 63 subjects met the protocol and were effective cases. 50 subjects were female and 13 were male. The youngest was 20 years old and the oldest was 45 years old. The average age was 30.34±8.45 years old. This study used this population for statistical analysis. The subjects were not allowed to use any products on the day of the test. Before the test, the subjects were required to clean their faces uniformly, dry them with dandruff-free facial tissues, and sit quietly in the human efficacy evaluation room (temperature: 20℃~22℃, humidity: 40%~60%) for 30 minutes. During this period, they were not allowed to drink water or beverages. The subjects were required to stay relaxed, expose their faces, and avoid touching them. Before the test, the subjects were given an explanation of the test and signed an informed consent form. The test area was the face. First, wet your face; squeeze an appropriate amount of cleansing gel on the forehead, nose tip, and cheeks, gently rub it, and massage the face in a circular motion from bottom to top and from inside to outside for 1 minute, paying attention to cleaning the nose and other places where dirt is easily hidden; rub it with clean water, gently massage for half a minute, and then wash it off. Use once a day. During the trial, subjects are prohibited from using repairing, soothing, and moisturizing preparations; subjects are prohibited from taking preparations that affect the repairing, soothing, and moisturizing tests by drip, injection, oral administration, or other forms.

[0076] 30 minutes after facial cleansing, use the skin moisture tester CorneometerCM825 to detect the moisture content of the skin stratum corneum at the test site (D1). The measured value before facial cleansing is used as the baseline value (D0). The test of the same subject is completed by the same instrument and the same tester. The test site should be kept consistent between the two test time points. The larger the value of the moisture content of the skin stratum corneum measured by CorneometerCM825, the higher the moisture content of the skin stratum corneum. By comparing the changes in the moisture 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 moisture content after using the cleaning product increases compared with the baseline value before use (D0), the higher the rate of increase in skin moisture content, indicating that the improvement effect of the surface moisture content in the test area is better, proving that the product has better moisturizing properties.

[0077] The results of the baseline value of the moisture content of the stratum corneum of the subjects before use (D0) and the moisture content of the stratum corneum of the subjects after use (D1) are shown in Table 4. The calculation formula for the moisture content increase rate is as follows: Skin moisture content increase rate = (moisture content after using the product - moisture content before using the product) / moisture content before using the product × 100%; the test results are shown in Table 4.

[0078] Table 4 From the experimental data in Table 4, it can be seen that the average foam score of the cleansing gel disclosed in the present invention is 3.98-4.29 points, the amount of corn alcohol-soluble protein dissolved is 1.14-1.51g, the whiteness difference is 50-58, and the skin moisture content increase rate is 34%-53%; This shows that the cleansing gel disclosed in the present invention has the advantages of high foaming, high cleaning power and low irritation, and at the same time has the advantages of moisturizing, and can achieve deep cleansing without damaging the skin.

[0079] By comparing Example 1 with Comparative Examples 1-4, it can be seen that the cleansing gel lacks at least one of coconut oil methyl monoethanolamide, preservative 9010 and carbomer, and the foaming property, cleaning power, irritation and moisturizing property of the cleansing gel decrease to varying degrees; it can be seen that only when coconut oil methyl monoethanolamide, preservative 9010 and carbomer work synergistically can a cleansing gel with high foaming property, high cleaning power, low irritation and good moisturizing effect be obtained.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 well, add pH adjuster and stir well 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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