An emulsified amino acid cleaning product and preparation method thereof

Abstract

The invention discloses an emulsified amino acid cleaning product and a preparation method thereof, and belongs to the technical field of cosmetics. The emulsified amino acid cleaning product provided by the invention has good compounding effect between components by selecting components with appropriate mass percentages, and the obtained emulsified amino acid cleaning product has good foaming performance, rich, delicate and stable foam, and the obtained emulsified amino acid cleaning product has a delicate paste and excellent stability. After use, the transepidermal water loss of the skin can be effectively reduced, and the water retention of the skin can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics, and in particular relates to an emulsified amino acid cleaning product and a preparation method thereof. Background Art

[0002] Currently common emulsified cleansing products such as facial cleansers generally use non-ionic emulsifiers (polysorbates, Span types) or amphiphilic emulsifiers (glycerides, fatty acid glycerides, fatty alcohols) with a small amount of anionic surfactants such as sodium laureth sulfate. This type of emulsified cleanser has the characteristics of being basically foam-free during use and having a poor cleaning effect.

[0003] Currently common amino acid cleaning products are generally crystalline or thickening types. The crystalline type usually uses amino acid surfactants as the main ingredient. Through acidification and cooling processes, the amino acid surfactants are crystallized to achieve self-crystallization thickening; however, this type of product has low compatibility with added oils and fats, so the user experience is not good and the skin feels dry after use. The thickening type usually uses thickeners, such as high molecular polymers, to increase the viscosity of the system, so that the system maintains a uniform and stable suspension or emulsion state, or forms a gel. However, the thickening system thickened by the thickener is prone to gel-like phenomena at low temperatures, and discoloration at high temperatures, and the stability is poor; at the same time, the foaming properties of this type of product are poor, and the skin feel is affected by the high molecular raw materials during cleaning, showing stickiness, incomplete cleaning, and a strong sense of residue. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide an emulsified amino acid cleaning product with excellent foam performance, good cleaning effect and stability, and excellent user experience, and a preparation method thereof.

[0005] To achieve the above object, the technical solution adopted by the present invention is: an emulsified amino acid cleaning product, the emulsified amino acid cleaning product comprises the following components in percentage by mass:

[0006] 0-2% sunscreen, 2-8% modified corn starch, 1-4% acrylate copolymer, 13-30% fatty acyl amino acid surfactant, 1-10% amphoteric surfactant, 0.5-12% oil, 0.5-3% C12-C18 acid, 0.05-0.4% antioxidant, 11-25% sodium coconut oil acyl amino acid substances, 1-25% liquid crystal thickener, balance water.

[0007] The emulsified amino acid cleaning product provided by the present invention has a good compounding effect between the components by selecting components with appropriate mass percentages, and the obtained emulsified amino acid cleaning product has good foam performance, rich, delicate and stable foam, and the obtained emulsified amino acid cleaning product has a delicate paste and excellent storage stability; and after evaluation by volunteers, it was found that the emulsified amino acid cleaning product prepared by the present invention has a high cleaning degree and good moisturizing effect after washing.

[0008] Specifically, the emulsified amino acid cleaning product provided by the present invention can significantly improve the consistency of the cleaning product by selecting and adding a suitable mass percentage of sodium cocoyl amino acid substances and liquid crystal thickeners, and the two cooperate with each other, so as to effectively improve the foaming performance and foam stability of the cleaning product, and the fine foam produced can effectively enter the pores, thereby improving the cleaning effect of the cleaning product; at the same time, a layer of oil film can be formed on the facial skin after use, so as to effectively improve the moisture after use and reduce the loss of transepidermal water of the skin; in addition, the emulsified amino acid cleaning product provided by the present invention can make the system more compatible with grease by adding a suitable mass percentage of sodium cocoyl amino acid substances and liquid crystal thickeners, so as to appropriately increase the amount of grease added without affecting the emulsification effect, enhance the protective effect on the skin barrier, reduce transepidermal water loss of the skin, and thus improve the skin moisture after cleaning. At the same time, the emulsified amino acid cleaning product provided by the present invention selects modified corn starch and acrylate copolymers, and modified corn starch and acrylate copolymers can be compounded with other components to achieve excellent product stability and good moisture after use.

[0009] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the emulsified amino acid cleaning product includes the following components in mass percentage: 0.04-0.1% sunscreen, 4-6% modified corn starch, 1.5-3% acrylate copolymer, 15-26% fatty acyl amino acid surfactant, 2-8% amphoteric surfactant, 1-9% oil, 1-2% C12-C18 acid, 0.1-0.3% antioxidant, 13-20% sodium coconut oil acyl amino acid substances, 10-20% liquid crystal thickener, and the balance water.

[0010] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the emulsified amino acid cleaning product includes the following components in mass percentage: 0.06% sunscreen, 5% modified corn starch, 1.6% acrylate copolymer, 25% fatty acyl amino acid surfactant, 3% amphoteric surfactant, 6% oil, 1.5% C12-C18 acid, 0.15% antioxidant, 15% sodium coconut oil acyl amino acid substance, 12% liquid crystal thickener, and the balance water.

[0011] The present invention has been found through research that the mass percentage of the components in the emulsified amino acid cleaning product provided by the present invention will affect the performance of the product. When the mass percentage of the components is further selected to be within the above range, the overall effect of the obtained product is more excellent.

[0012] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the mass ratio of the sum of the mass of the sodium coconut oil acyl amino acid substance and the liquid crystal thickener to the mass of the fatty acyl amino acid surfactant is (1-1.6):1.

[0013] Illustratively, the mass ratio of the sum of the masses of the sodium coconut oil acyl amino acid substance and the liquid crystal thickener to the mass ratio of the fatty acyl amino acid surfactant can be any point value or any two point range values ​​between (1-1.6):1, for example, 1:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1, 1.6:1, etc.

[0014] The present invention finds that the mass ratio of the sum of the masses of the sodium cocoyl amino acid substance and the liquid crystal thickener to the mass ratio of the fatty acyl amino acid surfactant will affect the foaming property and stability of the product to a certain extent. When the mass ratio of the two is further selected to be within the above range, the foam of the obtained product is richer, more delicate and more durable. At the same time, the storage stability of the obtained product is also better, and the moisturizing degree after use is also better.

[0015] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, in the emulsified amino acid cleaning product, the sum of the mass percentages of the sodium cocoyl amino acid substance and the liquid crystal thickener is ≥25%.

[0016] Preferably, in the emulsified amino acid cleaning product, the sum of the mass percentages of the sodium coconut oil acyl amino acid substance and the liquid crystal thickener is 25-35%.

[0017] Exemplarily, in the emulsified amino acid cleaning product, the sum of the mass percentages of the sodium cocoyl amino acid substance and the liquid crystal thickener can be any point value or any two point range values ​​between 25-35%, for example, it can be 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, etc.

[0018] The present invention finds that the sum of the mass percentages of the sodium cocoyl amino acid substance and the liquid crystal thickener in the emulsified amino acid cleaning product affects the consistency of the cleaning product, thereby not only affecting the foaming property of the product, but also affecting its compatibility with oil and other components, and further affecting the moisturizing degree after use and the stability of the product; when the sum of the mass percentages of the sodium cocoyl amino acid substance and the liquid crystal thickener is further selected to be within the above range, the comprehensive performance of the obtained product is better.

[0019] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the mass ratio of the modified corn starch to the oil is 1:(1-1.4).

[0020] Exemplarily, the mass ratio of the modified corn starch to the oil can be any point value or any range of two points between 1:(1-1.4), such as 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4, etc.

[0021] The present invention has found that there is a certain synergistic effect between the mass of modified corn starch and oil. When the two are compounded in a mass ratio within the above range, they can better achieve excellent moisturizing effect after cleansing, reduce transepidermal water loss of the skin, and improve the water retention of the skin.

[0022] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the sodium cocoyl amino acid substance includes at least one of sodium cocoyl amino acid, sodium methyl taurate, sodium sarcosinate, sodium citrate and sodium cocoyl amino acid.

[0023] Exemplarily, the sodium cocoyl amino acid, sodium methyl taurate, sodium sarcosinate and sodium citrate may be Amilip ® ACL50.

[0024] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the liquid crystal thickener includes sodium laurate taurate, modified corn starch, lauric acid and myristic acid.

[0025] Exemplarily, the sodium laurate taurate, modified corn starch, lauric acid and myristic acid may be BAFEORII ® T40.

[0026] The present invention has found that when sodium cocoyl amino acid substances and liquid crystal thickeners are further selected as the above substances, especially the substances of the above brands, the comprehensive effect of the obtained product is more excellent.

[0027] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the sunscreen comprises at least one of titanium dioxide, bamboo charcoal powder and kaolin.

[0028] Preferably, the sunscreen is titanium dioxide.

[0029] The present invention has found that when the sunscreen is further selected as the above substances, especially titanium dioxide, the compounding effect of the sunscreen with other components is better, which can help to achieve a product with a fine paste and excellent stability.

[0030] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the acrylate copolymer includes at least one of acrylic acid-acrylate copolymer, acrylate and stearyl ether 20-methacrylate copolymer, acrylate and polyoxyethylene-20 stearyl alcohol ether methacrylate copolymer.

[0031] Preferably, the acrylic acid ester copolymer is an acrylic acid-acrylic acid ester copolymer.

[0032] For example, the acrylic copolymer may be SF-1.

[0033] The present invention has found that the type of acrylic copolymer will also affect the consistency of the paste. When the acrylic copolymer is further selected as the above-mentioned substance, especially SF-1, the comprehensive performance of the obtained product is better.

[0034] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the fatty acyl amino acid surfactant includes at least one of potassium cocoyl glycinate and glycine, sodium cocoyl glycinate, potassium cocoyl glycinate, sodium cocoyl glutamate, and sodium lauroyl glutamate.

[0035] Preferably, the fatty acyl amino acid surfactant is potassium cocoyl glycinate and glycine.

[0036] Exemplarily, the potassium cocoyl glycinate and glycine may be BAFEORII ® EUK 35 P0.

[0037] The present invention has found that fatty acyl amino acid surfactants affect the foaming performance, stability and user experience of the product. When the fatty acyl amino acid surfactants are further selected as the above-mentioned substances, especially BAFEORII ® When EUK 35 P0 is used, the foam of the obtained product is richer and more stable, and the use experience is excellent, and the moisturizing degree after use is high.

[0038] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the amphoteric surfactant includes at least one of sodium lauroamphoacetate, cocamidopropyl betaine and lauroamidopropyl betaine.

[0039] Preferably, the amphoteric surfactant comprises sodium lauroamphoacetate.

[0040] Exemplarily, the sodium lauroamphoacetate may be imidazoline ML.

[0041] The present invention has found that the type of amphoteric surfactant affects the foaming performance of the product and also affects the stability of the product. When the amphoteric surfactant is further selected as the above substances, especially sodium lauroylamphoacetate, the comprehensive performance of the obtained product is better.

[0042] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the oil includes at least one of sunflower oil, grape seed oil, shea butter, refined olive oil, meadowfoam seed oil, and wild soybean oil.

[0043] Preferably, the oil is sunflower oil.

[0044] The present invention has been found in the research that more oil can be added to the system of the present invention. When the type of oil is further selected as the above-mentioned type, especially sunflower oil, it has good compatibility with modified corn starch and the like in the system, thereby ensuring good foaming performance and stability of the product, and the experience after use is also more excellent.

[0045] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the antioxidant includes at least one of 2,6-di-tert-butyl-p-cresol and butylated hydroxyanisole.

[0046] Preferably, the antioxidant is 2,6-di-tert-butyl-p-cresol.

[0047] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the amino acid cleaning product further comprises 0.05-1% pigment, 0.01-0.05% preservative, and 0.01-0.1% flavor.

[0048] The present invention has no particular restrictions on the selection of pigments, preservatives and flavors, and any pigments, preservatives and flavors conventionally added in the art can be added.

[0049] As a preferred embodiment of the emulsified amino acid cleaning product of the present invention, the cleaning product includes any one of a facial cleanser and a shower gel.

[0050] In a second aspect of the present invention, the present invention provides a method for preparing the emulsified amino acid cleaning product, the preparation method comprising the following steps:

[0051] Sunscreen, modified corn starch and acrylate copolymer are added into water in sequence and dispersed evenly, then fatty acyl amino acid surfactant, sodium coconut oil acyl amino acid substance, amphoteric surfactant, part of oil, C12-C18 acid and antioxidant are added in sequence and dispersed evenly, then the temperature is raised and stirred and liquid crystal thickener is added, and finally the remaining part of oil is added and stirred after cooling to obtain an emulsified amino acid cleaning product.

[0052] As a preferred embodiment of the preparation method of the present invention, the temperature of heating and stirring is 90-95° C., and the stirring speed is 160-180 rpm.

[0053] As a preferred embodiment of the preparation method of the present invention, the temperature after cooling is 70-80°C.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] The emulsified amino acid cleaning product provided by the present invention has a good compounding effect between the components by selecting components with appropriate mass percentages, and the obtained emulsified amino acid cleaning product has good foaming performance, rich, delicate and stable foam, and the obtained emulsified amino acid cleaning product has a delicate paste and excellent stability; after use, it can effectively reduce the transepidermal water loss of the skin and improve the water retention of the skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 This is a photograph of the emulsified amino acid cleanser prepared in Example 1;

[0057] Figure 2 Take a picture of the paste of commercially available facial cleansing milk;

[0058] Figure 3 This is a microscopic observation result of the emulsified amino acid cleanser prepared in Example 1;

[0059] Figure 4 This is a test result diagram of the emulsified amino acid cleanser prepared in Example 1 and a commercially available product in Effect Example 1;

[0060] Figure 5 This is a state diagram of the emulsified amino acid cleanser prepared in Example 1 after the cycle test in the stability test;

[0061] Figure 6 This is a schematic diagram of the foam generated during the use of the emulsified amino acid cleanser prepared in Example 1;

[0062] Figure 7 Schematic diagram of the foam produced during the use of commercially available facial cleansers. DETAILED DESCRIPTION

[0063] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0064] Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the art.

[0065] The INCI names of some components used in the examples and comparative examples of the present invention and the trade names of raw materials are shown in Table 1;

[0066] Table 1

[0067]

[0068] Examples 1-8

[0069] The embodiment of the present invention provides an emulsified amino acid facial cleanser, the components (mass percentage) of the emulsified amino acid facial cleanser are shown in Table 2;

[0070] Table 2

[0071]

[0072] The preparation method of the emulsified amino acid cleanser provided in Example 1 comprises the following steps:

[0073] (1) Weigh the sunscreen agent into a beaker, add an appropriate amount of water, stir for 2 minutes, and add the modified corn starch to mix evenly for 2 minutes. After the mixture is evenly dispersed, add the acrylic copolymer and stir for 2 minutes to mix evenly.

[0074] (2) Adding the amphoteric surfactant, sodium coconut amino acid and fatty acyl amino acid surfactant to the system dispersed uniformly in step (1) in sequence while stirring (at a speed of 50 rpm), adding 30% oil, antioxidant and C12-C18 acid after stirring evenly, and then placing the beaker in a 93°C water bath and stirring at 170 rpm;

[0075] (3) After stirring for 20 minutes, add liquid crystal thickener to the system and continue stirring for 50 minutes. Then stop heating, add 0.1% pigment aqueous solution, and stir at 90 rpm;

[0076] (4) When the system temperature drops to 75°C, add the remaining oil and stir at a speed of 90 rpm until the system temperature reaches 50°C. Finally, add preservatives and fragrances, continue stirring until the system temperature reaches 45°C, and discharge the material to obtain an emulsified amino acid cleanser.

[0077] The photograph of the emulsified amino acid cleanser prepared in Example 1 is as follows: Figure 1 As shown, the photographs of commercially available products are shown in Figure 2 As shown, from Figure 1-2 It can be seen that the cream of the cleansing milk prepared by the technical solution of the present invention is fine; the emulsified amino acid cleansing milk prepared in Example 1 is further observed under a microscope, and the results are as follows Figure 3 As shown, from Figure 3It can be seen that the emulsified structure of the cleanser is uniform and small, and the particle size range of the uniformly emulsified oil droplets is 2-10 microns.

[0078] The preparation methods of the emulsified amino acid facial cleansers provided in Examples 2-8 are consistent with those in Example 1.

[0079] Example 9

[0080] The embodiment of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and embodiment 1 is that sunscreen agent 2 is used instead of sunscreen agent 1.

[0081] Example 10

[0082] The embodiment of the present invention provides an emulsified amino acid facial cleanser. The only difference between the emulsified amino acid facial cleanser and the embodiment 1 is that the acrylic acid ester copolymer 2 is used to replace the acrylic acid ester copolymer 1.

[0083] Embodiment 11

[0084] The embodiment of the present invention provides an emulsified amino acid facial cleanser, wherein the only difference between the emulsified amino acid facial cleanser and the embodiment 1 is that the fatty acyl amino acid surfactant 2 is used to replace the fatty acyl amino acid surfactant 1.

[0085] Example 12

[0086] The embodiment of the present invention provides an emulsified amino acid facial cleanser, wherein the only difference between the emulsified amino acid facial cleanser and the embodiment 1 is that the amphoteric surfactant 2 is used to replace the amphoteric surfactant 1.

[0087] Embodiment 13

[0088] The embodiment of the present invention provides an emulsified amino acid facial cleanser, and the only difference between the emulsified amino acid facial cleanser and the embodiment 1 is that the oil 2 replaces the oil 1.

[0089] Comparative Example 1

[0090] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that no sodium coconut oil acyl amino acid substance is added, and the amount thereof is supplemented by a fatty acyl amino acid surfactant.

[0091] Comparative Example 2

[0092] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that no liquid crystal thickener is added, and the amount thereof is supplemented by an acrylic copolymer.

[0093] Comparative Example 3

[0094] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that no acrylic acid ester copolymer is added, and the amount thereof is supplemented by a liquid crystal thickener.

[0095] Comparative Example 4

[0096] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that cellulose is used instead of modified corn starch.

[0097] Comparative Example 5

[0098] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that the mass percentage of sodium coconut oil acyl amino acid substances is 30%.

[0099] Comparative Example 6

[0100] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that the mass percentage of sodium coconut oil acyl amino acid substances is 5%.

[0101] Comparative Example 7

[0102] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that the mass percentage of the liquid crystal thickener is 30%.

[0103] Comparative Example 8

[0104] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that the mass percentage of the liquid crystal thickener is 4%.

[0105] Comparative Example 9

[0106] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that the mass percentage of oil is 0.1%.

[0107] Comparative Example 10

[0108] The comparative example of the present invention provides an emulsified amino acid facial cleanser, the only difference between the emulsified amino acid facial cleanser and Example 1 is that the mass percentage of oil is 15%.

[0109] Effect Example 1

[0110] The effect example of the present invention verifies the foam performance of the emulsified amino acid facial cleanser prepared in Examples 1-13 and Comparative Examples 1-10. The prepared emulsified amino acid facial cleanser is prepared into a 3% aqueous solution, added to a Krueger foam instrument, and foam is generated by stirring. According to the light transmittance of the sample, the average particle size, number, height generated, and height attenuation of the foam are monitored by an optical sensor. The obtained image is analyzed with foam analysis software, and the average particle size distribution and maximum foam volume of the bubbles during the test are recorded, and the half-life is recorded at the same time. The test process time is 5 minutes (simulating the cleaning process, the cleaning process time varies from person to person, generally 2-3 minutes, not more than 5 minutes), where tBc1 / 2 refers to the time when the number of bubbles is reduced by 50%. Since the test time is 5 minutes, if the reduction is not achieved by 50% within 5 minutes, the half-life is recorded as "none";

[0111] By recording the average particle size of the bubbles in the product, it can be shown whether the foam of the product is fine and dense, and whether it can effectively penetrate into the pores. It is known that the smaller the average particle size of the bubbles, the easier it is to enter the skin through the pores, thereby achieving a deep cleansing effect; recording the half-life of the number of bubbles tBc1 / 2 can indicate whether the bubbles of the product can be continuously generated or maintained. The longer the half-life, the more bubbles are replenished, thereby extending the half-life, that is, the more stable the bubbles generated; recording the maximum foam volume can indicate the amount of foam generated, that is, whether a sufficient amount of foam can be generated;

[0112] The test results are shown in Table 3;

[0113] Table 3

[0114]

[0115] It can be seen from Table 3 that when the technical solution provided by the present invention is adopted, the obtained cleansing milk has excellent foam performance, which can not only produce abundant foam but also fine foam and long half-life; specifically, the average particle size of the foam of the obtained cleansing milk is between 90-135 μm, the maximum foam volume is above 102.0 mL, and the half-life is above 271.3 s; wherein, the test results of the emulsified amino acid cleansing milk prepared in Example 1 and the commercially available product are shown in the figure below. Figure 4 As shown, from Figure 4 It can also be clearly seen that the foam performance of the facial cleanser obtained by adopting the technical solution of the present invention is more excellent;

[0116] It can be seen from Example 1 and Comparative Examples 1-2 that when no sodium cocoyl amino acid substance or liquid crystal thickener is added, the foam performance of the obtained product is significantly reduced. Specifically, not only the foam particle size becomes larger, but also the stability and production amount of the foam are significantly deteriorated. It can be seen from Example 1 and Comparative Examples 6 and 8 that when the addition amount of sodium cocoyl amino acid substance or liquid crystal thickener is too low, the foam performance of the obtained product also shows a significant downward trend.

[0117] Effect Example 2

[0118] The effect example of the present invention verifies the stability of the emulsified amino acid cleansing milk prepared by Examples 1-13 and Comparative Examples 3-5, Comparative Example 7, and Comparative Examples 9-10 (the foam performance of the cleansing milks of Comparative Examples 1-2, Comparative Example 6, and Comparative Example 8 is too poor, and no further stability exploration is performed). The samples are placed at room temperature for 90 days, at 48°C for 30 days, at -15°C for 30 days, under direct sunlight for 30 days, and at -15°C-room temperature-48°C for 7 cycles (placed at each temperature system for 24 hours), and whether the samples are stratified or discolored is recorded. The recorded results are shown in Table 4;

[0119] If there is no change, it is indicated by " / ";

[0120] Table 4

[0121]

[0122] It can be seen from Table 4 that the emulsified amino acid cleanser prepared by the technical solution provided by the present invention has good storage stability, and no stratification or discoloration will occur when placed under normal temperature, high temperature, low temperature and direct sunlight for a number of days; wherein, the state diagram of the emulsified amino acid cleanser prepared in Example 1 after the cycle test in the stability test is as follows Figure 5 As shown, from Figure 5 It can be seen that the facial cleanser prepared by the technical solution of the present invention has excellent stability;

[0123] It can be seen from Example 1 and Comparative Example 3 that when no acrylic copolymer is added, the stability of the obtained cleansing milk decreases significantly; it can be seen from Example 1 and Comparative Example 4 that when cellulose is used instead of modified corn starch, the stability of the obtained cleansing milk also decreases significantly; it can be seen from Example 1 and Comparative Example 10 that when too much oil is added, the stability of the obtained cleansing milk also shows a certain downward trend.

[0124] Effect Example 3

[0125] The effect example of the present invention verifies the safety of the emulsified amino acid facial cleansing milk prepared by Examples 1-13 and Comparative Examples 5, 7 and 9, and specifically comprises the following steps:

[0126] 28 volunteers aged between 20 and 50 were selected, the wells of the spot tester were numbered, and the test samples were placed in the wells of the corresponding numbered spot tester, with a dosage of 0.02 mL per well; the spot tester with the test substance was applied to the back of the subject with a low-allergenic tape, and the palm of the hand was gently pressed to make it evenly applied to the skin for 24 hours. Afterwards, the spot tester was removed and the skin condition of the wound site was observed. The identification criteria are shown in Table 5;

[0127] Table 5

[0128]

[0129] Through tests, it was found that the facial cleansing milk obtained by adopting the technical solution of the present invention has a skin irritation level of 0, that is, it is non-irritating.

[0130] Effect Example 4

[0131] The effect example of the present invention verifies the moisturizing degree of the emulsified amino acid cleansing milk prepared in Examples 1-13 and Comparative Examples 5, 7 and 9 after use. 85 healthy volunteers aged 18-25 were selected and divided into 17 groups, with 5 people in each group. After sitting in an air-conditioned room with a temperature of 21±1°C and a humidity of 50±10% for 20 minutes, the volunteers in each group used the corresponding emulsified amino acid cleansing milk to clean their faces (the amount of cleansing milk used and the washing time were kept consistent). The end of cleaning was recorded as 0min, and then the volunteers continued to sit in an air-conditioned room with a temperature of 21±1°C and a humidity of 50±10% for 30min; the TEWL value of the facial skin of the volunteers after cleaning and sitting for 30min was tested using a skin transepidermal water loss probe TewaMeter®TMHex (Courage + Khazaka) and the average value was taken, and then the TEWL value retention rate was calculated, TEWL value retention rate=(30minTEWL value-0minTEWL value) / 0min TEWL value × 100%, the results are shown in Table 6;

[0132] At the same time, the volunteers were asked to rate the rinsability of the cleansing milk on a scale of 1-5, with the higher the score, the easier it is to rinse. The average scores are shown in Table 6;

[0133] Table 6

[0134]

[0135] It can be seen from Table 6 that when the technical solution provided by the present invention is adopted, the obtained cleansing milk has a good ability to maintain the skin barrier, and the cleansing milk is easy to rinse; specifically, the rinseability score is above 4.2 points, and the TEWL value retention rate is above 89.0%;

[0136] It can be seen from Example 1 and Comparative Example 5 that when the mass percentage of sodium cocoyl amino acid is too high, the obtained product has too high a consistency and is not easy to clean; it can be seen from Example 1 and Comparative Example 7 that when the mass percentage of liquid crystal thickener is too high, the difficulty of cleaning the obtained product also increases; it can be seen from Example 1 and Comparative Example 9 that when the mass percentage of oil is too low, the ability of the obtained product to maintain the skin barrier shows a downward trend.

[0137] In addition, the foam produced by the facial cleanser prepared in Example 1 and the commercially available facial cleanser during use was recorded as follows: Figure 6-7 As shown, from Figure 6-7 It can be seen that compared with commercially available products, the facial cleanser prepared by the present invention can produce abundant foam.

[0138] Finally, it should be noted that the above embodiments are intended to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention 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 invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An emulsified amino acid cleaning product, characterized in that: The emulsified amino acid cleaning product comprises the following components in percentage by mass: 0.04-0.1% sunscreen, 4-6% modified corn starch, 1.5-3% acrylate copolymer, 15-26% fatty acyl amino acid surfactant, 2-8% amphoteric surfactant, 1-9% oil, 1-2% C12-C18 acid, 0.1-0.3% antioxidant, 13-20% sodium coconut oil acyl amino acid substances, 10-20% liquid crystal thickener, balance water; The fatty acyl amino acid surfactant is potassium cocoyl glycinate and glycine; The sodium cocoyl amino acid substances are sodium cocoyl amino acid, sodium methyl taurate, sodium sarcosinate and sodium citrate; The acrylic acid ester copolymer is an acrylic acid-acrylic acid ester copolymer; The grease is sunflower oil; The amphoteric surfactant is sodium lauroamphoacetate; The liquid crystal thickener is sodium laurate taurate, modified corn starch, lauric acid and myristic acid; The mass ratio of the modified corn starch to the oil is 1:(1-1.4); The mass ratio of the sum of the mass of the sodium coconut oil acyl amino acid substance and the liquid crystal thickener to the mass of the fatty acyl amino acid surfactant is (1-1.6): 1; In the emulsified amino acid cleaning product, the sum of the mass percentages of the sodium coconut oil acyl amino acid substance and the liquid crystal thickener is 25-35%.

2. The emulsified amino acid cleaning product according to claim 1, characterized in that: The emulsified amino acid cleaning product comprises the following components in percentage by mass: 0.06% sunscreen, 5% modified corn starch, 1.6% acrylate copolymer, 25% fatty acyl amino acid surfactant, 3% amphoteric surfactant, 6% oil, 1.5% C12-C18 acid, 0.15% antioxidant, 15% sodium coconut oil amino acid, 12% liquid crystal thickener, balance water.

3. The emulsified amino acid cleaning product according to claim 1, characterized in that: The sunscreen agent includes at least one of titanium dioxide, bamboo charcoal powder and kaolin; And / or, the antioxidant includes at least one of 2,6-di-tert-butyl-p-cresol and butylated hydroxyanisole.

4. The emulsified amino acid cleaning product according to claim 1, characterized in that: The cleaning product includes any one of a facial cleanser and a shower gel.

5. The method for preparing the emulsified amino acid cleaning product according to any one of claims 1 to 4, characterized in that: The preparation method comprises the following steps: Sunscreen, modified corn starch and acrylate copolymer are sequentially added into water and dispersed evenly, then fatty acyl amino acid surfactant, sodium coconut oil acyl amino acid substance, amphoteric surfactant, part of oil, C12-C18 acid and antioxidant are sequentially added and dispersed evenly, then the temperature is raised and stirred and liquid crystal thickener is added, finally the temperature is lowered and the remaining oil is added and stirred to obtain an emulsified amino acid cleaning product.

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