Mild moisturizing facial cleanser and preparation method thereof

Abstract

The invention provides a mild moisturizing facial cleanser and a preparation method thereof. According to the facial cleanser disclosed by the invention, the sodium cocoyl glutamate, the sodium methyl cocoyl taurate and the cocamidopropyl betaine which are compounded in a specific appropriate proportion are mainly used as surfactants; the herba portulacae extract and the herba centellae extract are used as active matters with a relieving effect; polydimethylsiloxane is used as an emollient; in addition, a proper amount of humectants, emulsifiers, antioxidants, preservatives, thickeners and pH regulators are also added, so that the performance of the product is further regulated. The facial cleanser can effectively clean the skin, can gently care the skin, and has good moisturizing and soothing effects.

Description

Technical Field

[0001] The invention relates to the field of daily cosmetics, and in particular to a mild and moisturizing facial cleanser and a preparation method thereof. Background Art

[0002] Cleansing is the process of removing sebum, stratum corneum flakes, sweat and other skin physiological metabolites as well as dust, microorganisms, cosmetic residues, etc. attached to the surface of facial skin by washing. It makes the skin refreshed and helps maintain the skin's normal physiological state. It is the first step in skin care. Wrong choice of cleansing products is the root cause of skin problems for many people.

[0003] There are many types of facial cleansing products available on the market. According to the formula of facial cleansers, several commonly used types include emulsified facial cleansers, surfactant facial cleansers, soap-based facial cleansers, MAP facial cleansers, SCI facial cleansers, alkyl glycoside facial cleansers and amino acid facial cleansers. Among them, emulsified facial cleansers use an emulsification system, and the product appearance is similar to ordinary cream lotions. There is basically no foam when used, and the cleaning effect is poor. However, due to the use of an emulsification system, it has a certain cleansing and moisturizing effect. After washing, the skin is smooth, moisturized and has excellent skin care functions. Surfactant facial cleansers use ordinary surfactants as the main ingredients, and can be made into a transparent or pearlescent system. The appearance is a flowable emulsion or paste, the cleaning effect is moderate, and the foam richness is average, but it may give consumers a feeling of incomplete washing. Soap-based facial cleansers use fatty acid soap as the main ingredient. The product has a thick paste appearance, generally has a strong pearlescent effect, rich foam, strong cleaning power, and is suitable for oily skin. The disadvantage is that it may cause tightness or dry skin after use. Amino acid-based facial cleansers are the most gentle products. This type of product has the characteristics of rich foam and good cleaning effect of soap-based products, but without the tightness and dryness of soap-based products. It feels comfortable when used, but the moisturizing effect is insufficient, which can easily cause dry and flaky skin. Summary of the invention

[0004] The present invention provides a mild moisturizing facial cleanser and a preparation method thereof. The product selects a mild surfactant, and adds natural plant extracts and emollient polydimethylsiloxane as skin conditioners and emollients, and adds a moisturizer to achieve a mild moisturizing cleansing effect, which is achieved by adopting the following technical scheme.

[0005] Specifically, the facial cleanser contains the following components by weight:

[0006] 2.0-30.0 parts of moisturizer, 7.0-40.0 parts of surfactant, 0.2-10.0 parts of plant extract, 0.1-1.0 parts of emollient, 0.1-5.0 parts of hydroxyethyl cellulose, 0.01-1.0 parts of vitamin E, 0.01-5.0 parts of polyglyceryl-10 laurate, 0.1-5.0 parts of sodium chloride, 0.01-1.0 parts of potassium sorbate, and 0.01-1.0 parts of citric acid.

[0007] Specifically, the moisturizing agent is a mixture of glycerin and propylene glycol.

[0008] Preferably, the mass ratio of glycerol to propylene glycol is (1.0-15.0):(1.0-15.0) for example, 1:15.0, 1:13, 1:12, 1:10, 1:8, 1:6, 1:5, 1:4, 1:3, 1:2, 1:1, 10:8, 10:7, 12:7, 2:1, 3:1, 4:1, 5:1, 6:1, 8:1, 10:1, 12:1, 13:1, 14:1 or 15:1, etc.

[0009] Specifically, the surfactant is selected from: one or more of sodium cocoyl glutamate, sodium methyl cocoyl taurate, and cocamidopropyl betaine.

[0010] The facial cleanser comprises sodium cocoyl glutamate, sodium methyl cocoyl taurate and cocamidopropyl betaine compounded in a specific suitable ratio as surfactants.

[0011] Sodium cocoyl glutamate, sodium methyl cocoyl taurate and cocamidopropyl betaine construct the core cleansing system. As surfactants, their gentle and efficient cleansing power can penetrate deep into the pores to remove dirt and oil without damaging the skin's epidermal barrier.

[0012] Preferably, the surfactant is a combination of sodium cocoyl glutamate, sodium methyl cocoyl taurate and cocamidopropyl betaine, wherein the mass ratio of sodium cocoyl glutamate, sodium methyl cocoyl taurate and cocamidopropyl betaine is (8-15):(3-9):(3-8), for example, 8:9:8, 8:9:6, 8:7:6, 8:6:6, 10:6:6, 12:6:6, 13:6:6, 12:6:5, 13:6:5, 12:5:5, 13:5:5, 14:5:4, 15:5:4, 8:8:8, 15:4:3 or 15:3:3, etc.

[0013] Specifically, the plant extracts are Centella asiatica extract and Portulaca oleracea extract.

[0014] Purslane extract is rich in a variety of skin-soothing nutrients that can quickly soothe skin's sensitivity and discomfort. Centella asiatica extract, with its powerful repair ability, promotes skin self-repair and effectively relieves irritation that the skin may experience during the cleansing process. The two complement each other, keeping the skin in a soothing and peaceful state at all times.

[0015] The purslane extract and the centella asiatica extract are both extracted by alcohol extraction method.

[0016] Preferably, the mass ratio of the Centella asiatica extract to the Portulaca oleracea extract is (0.1-5.0):(0.1-5.0), for example, 0.1:5.0, 0.2:2.5, 1:10, 3:20, 0.5:2, 3:10, 2:5, 1:2, 1.5:2, 1:1.5, 4:5, 1:1, 2.5:2, 2:1.5, 3:2, 2:1, 2.5:1 , 3:1, 5:1, 7:1, 8:1, 1:0.1, 1.2:0.1, 1.3:0.1, 1.5:0.1, 1.8:0.1, 2.0:0.1, 2.5:0.1, 3.0:0.1, 3.5:0.1, 4.0:0.1, 4.5:0.1 or 5.0:0.1, etc., and more preferably (0.1-4.0):(0.1-4.0).

[0017] Specifically, the emollient is polydimethylsiloxane.

[0018] Polydimethylsiloxane can form a thin, breathable protective film on the skin surface, locking in skin moisture and giving the skin an unparalleled moist texture.

[0019] Specifically, the facial cleanser contains the following components by weight:

[0020] 1.0-15.0 parts of glycerin, 1.0-15.0 parts of propylene glycol, 5.0-20.0 parts of sodium cocoyl glutamate, 1.0-10.0 parts of sodium methyl cocoyl taurate, 1.0-10.0 parts of cocamidopropyl betaine, 0.1-5.0 parts of hydroxyethyl cellulose, 0.1-5.0 parts of purslane extract, 0.1-5.0 parts of Centella asiatica extract, 0.1-1.0 parts of polydimethylsiloxane, 0.01-1.0 parts of vitamin E, 0.01-5.0 parts of polyglyceryl-10 laurate, 0.1-5.0 parts of sodium chloride, 0.01-1.0 parts of potassium sorbate, and 0.01-1.0 parts of citric acid.

[0021] Preferably, the facial cleanser contains the following components in parts by mass:

[0022] 5.0-15.0 parts of glycerin, 1.0-12.0 parts of propylene glycol, 8.0-15.0 parts of sodium cocoyl glutamate, 3.0-9.0 parts of sodium methyl cocoyl taurate, 3.0-8.0 parts of cocamidopropyl betaine, 0.1-3.0 parts of hydroxyethyl cellulose, 0.1-4.0 parts of purslane extract, 0.1-4.0 parts of Centella asiatica extract, 0.1-1.0 parts of polydimethylsiloxane, 0.01-1.0 parts of vitamin E, 0.5-3.0 parts of polyglyceryl-10 laurate, 0.5-4.0 parts of sodium chloride, 0.01-1.0 parts of potassium sorbate, and 0.01-0.8 parts of citric acid.

[0023] Further preferably, the facial cleanser contains the following components in parts by mass:

[0024] Glycerin 8.0-12.0 parts, propylene glycol 5.0-8.0 parts, sodium cocoyl glutamate 10.0-14.0 parts, sodium methyl cocoyl taurate 4.0-8.0 parts, cocamidopropyl betaine 3.0-8.0 parts, hydroxyethyl cellulose 0.1-2.0 parts, purslane extract 0.1-4.0 parts, Centella asiatica extract 0.1-4.0 parts, polydimethylsiloxane 0.1-0.8 parts, vitamin E 0.05-1.0 parts, polyglyceryl-10 laurate 0.5-2.0 parts, sodium chloride 0.5-1.5 parts, potassium sorbate 0.01-0.8 parts, citric acid 0.01-0.5 parts.

[0025] In an embodiment of the present invention, the facial cleanser contains the following components in parts by mass:

[0026] 10.0 parts of glycerin, 5.0 parts of propylene glycol, 12.0 parts of sodium cocoyl glutamate, 6.0 parts of sodium methyl cocoyl taurate, 5.0 parts of cocamidopropyl betaine, 0.5 parts of hydroxyethyl cellulose, 2.0 parts of purslane extract, 0.5 parts of Centella asiatica extract, 0.5 parts of polydimethylsiloxane, 0.1 parts of vitamin E, 1.0 parts of polyglyceryl-10 laurate, 0.8 parts of sodium chloride, 0.5 parts of potassium sorbate, and 0.03 parts of citric acid.

[0027] In an embodiment of the present invention, the facial cleanser contains the following components in parts by mass:

[0028] 10.0 parts of glycerin, 7.0 parts of propylene glycol, 12.0 parts of sodium cocoyl glutamate, 6.0 parts of sodium methyl cocoyl taurate, 6.0 parts of cocamidopropyl betaine, 0.5 parts of hydroxyethyl cellulose, 2.0 parts of purslane extract, 0.5 parts of Centella asiatica extract, 0.4 parts of dimethicone, 0.1 parts of vitamin E, 1.0 parts of polyglyceryl-10 laurate, 0.8 parts of sodium chloride, 0.5 parts of potassium sorbate, and 0.02 parts of citric acid.

[0029] In an embodiment of the present invention, the facial cleanser contains the following components in parts by mass:

[0030] 12.0 parts of glycerin, 7.0 parts of propylene glycol, 13.0 parts of sodium cocoyl glutamate, 5.0 parts of sodium methyl cocoyl taurate, 5.0 parts of cocamidopropyl betaine, 0.5 parts of hydroxyethyl cellulose, 2.0 parts of purslane extract, 0.5 parts of Centella asiatica extract, 0.3 parts of dimethicone, 0.1 parts of vitamin E, 1.0 parts of polyglyceryl-10 laurate, 0.8 parts of sodium chloride, 0.5 parts of potassium sorbate, and 0.02 parts of citric acid.

[0031] In an embodiment of the present invention, the facial cleanser contains the following components in parts by mass:

[0032] 8.0 parts of glycerin, 8.0 parts of propylene glycol, 13.0 parts of sodium cocoyl glutamate, 6.0 parts of sodium methyl cocoyl taurate, 5.0 parts of cocamidopropyl betaine, 0.5 parts of hydroxyethyl cellulose, 2.5 parts of purslane extract, 1.0 parts of Centella asiatica extract, 0.3 parts of dimethicone, 0.1 parts of vitamin E, 1.0 parts of polyglyceryl-10 laurate, 0.8 parts of sodium chloride, 0.5 parts of potassium sorbate, and 0.02 parts of citric acid.

[0033] Specifically, an appropriate amount of deionized water needs to be added to the facial cleanser.

[0034] Another aspect of the present invention provides a method for preparing a facial cleanser, the method comprising the following steps:

[0035] 1) adding ionized water, glycerin, propylene glycol, dimethicone, polyglyceryl-10 laurate, sodium chloride and tocopherol, heating and stirring to obtain a first mixture;

[0036] 2) adding sodium cocoyl glutamate, sodium methyl lauroyl taurate and cocamidopropyl betaine to the first mixture, heating and stirring to obtain a second mixture;

[0037] 3) adding the purslane extract and the Centella asiatica extract to the second mixture, stirring to obtain a third mixture;

[0038] 4) Add hydroxyethyl cellulose, citric acid and potassium sorbate to the third mixture, stir, let the sample stand, and fill it to obtain a facial cleanser sample.

[0039] Preferably, the stirring speed is 40rpm-600rpm (for example, 40rpm, 80rpm, 120rpm, 160rpm, 200rpm, 300rpm, 400rpm, 500rpm or 600rpm, etc.), and the stirring time is 10-30min (for example, 10min, 15min, 20min, 25min or 30min, etc.).

[0040] Preferably, the heating temperature in step 1) is 50-80°C (eg 50°C, 60°C, 70°C or 80°C, etc.), more preferably 70°C.

[0041] Preferably, the heating temperature in step 2) is 40-80°C (eg 40°C, 50°C, 60°C, 70°C or 80°C, etc.), more preferably 60°C.

[0042] Preferably, the standing time in step 3) is 16-36 h (e.g., 16 h, 18 h, 20 h, 22 h, 24 h, 26 h, 28 h, 30 h, 32 h, 34 h or 36 h, etc.).

[0043] Specifically, the heating method is water bath heating.

[0044] The beneficial effects of the present invention are:

[0045] The facial cleanser of the present invention mainly uses sodium cocoyl glutamate, sodium methyl cocoyl taurate and cocamidopropyl betaine compounded in a specific appropriate ratio as surfactants; uses purslane extract and Centella asiatica extract as soothing active ingredients; uses polydimethylsiloxane as an emollient; and further adds appropriate amounts of moisturizers, emulsifiers, antioxidants, preservatives, thickeners and pH regulators to further adjust product performance. The facial cleanser can effectively clean the skin, gently protect the skin, and has good moisturizing and soothing effects. DETAILED DESCRIPTION

[0046] Unless otherwise specified, the "cosmetics" mentioned in this application can be understood in a broad sense, including both makeup products and skin care products, such as facial masks, facial cleansers, shower gels, etc.

[0047] The main components of the present invention are described as follows:

[0048] Purslane, also known as longevity grass, contains a variety of nutrients such as protein, fat, carbohydrates, dietary fiber, calcium, phosphorus, iron, copper, carotene, vitamin B1, vitamin B2, niacin, vitamin C, etc., especially vitamins such as vitamin A, vitamin C, riboflavin and minerals such as calcium and iron. Its ω-3 fatty acid content ranks first among green leafy vegetables. According to modern research, purslane can inhibit the growth of Staphylococcus aureus, Salmonella typhi and other bacteria, improve lipid metabolism, inhibit sebaceous gland secretion, prevent and treat acne, and in terms of external use, it can treat skin sores and suppurative diseases, and has a very good effect on eczema, lacquer sores, dermatitis, skin itching and pain. The main effects of purslane extract are anti-allergic, anti-inflammatory and anti-inflammatory, and resistance to various external stimuli to the skin, as well as acne removal. In particular, it has a significant anti-allergic effect on skin allergies caused by long-term use of hormone cosmetics.

[0049] Centella asiatica has the effects of clearing away heat and detoxifying, removing dampness and swelling, nourishing, anti-inflammatory and calming. The asiatica glycoside contained in Centella asiatica can stimulate the replacement of deep skin cells, tighten the connection between the epidermis and the dermis, soften the skin, help solve the problem of skin sagging, and make the skin smooth and elastic; promote the formation of collagen in the dermis, regenerate fibrin, reconnect, and make the skin firm and smooth. It can also help wound tissue healing and tighten the skin. It can not only promote the close connection between the epidermis and the dermis, but also inhibit the increase of fat cells, prevent skin edema and obesity. Centella asiatica is suitable for all skin types. Centella asiatica contains a variety of a-amyrin type triterpenoid components, which have a calming and stabilizing effect. Adding it to cosmetics can help calm the skin and relieve sensitivity.

[0050] Glycerin is a sweet, odorless, transparent, colorless viscous liquid, and its chemical name is propylene glycol. Glycerin is widely present in the form of esters in animal and plant oils and fats. Glycerin has a significant moisturizing effect on human hair and skin, and has good moisturizing and hygroscopic effects. Adding glycerin to cosmetics can increase the solubility of components. Using glycerin in various cosmetics can improve the feel of use, maintain skin health, regulate the physiological functions of the skin, and replenish the required moisture to the stratum corneum of the skin.

[0051] Sodium cocoyl glutamate (scG), a colorless to light yellow liquid or white solid, is an anionic surfactant with high safety, low irritation, appropriate foam and strong cleaning ability.

[0052] Sodium Cocoyl Methyl Taurate is a mild surfactant of the distaurine type, which is made by introducing taurine into sodium cocoyl methyl taurate. This distaurine type surfactant not only retains the excellent foaming properties of the monotaurine type, but also has good mildness, rich foam, and hard water resistance. It has moderate cleaning power for sebum and will not cause excessive elution of sebum. It is suitable for the development of mild rinse-off products.

[0053] Cocamidopropyl betaine (CAPB) is not only odorless, light in color, low in salt content, and mild to the skin, but also has excellent wetting, dispersing, cleaning, penetration, antistatic, sterilizing, conditioning, thickening, calcium soap dispersing and biodegradable properties. It is fully compatible with anionic, cationic and nonionic surfactants, and has good solubilizing properties. CAPB can produce abundant foam in both soft water and hard water, and also shows good washing effect in cold water. It also has excellent cleaning and foaming ability in electrolytes or seawater. It is particularly characterized by fast foaming, rich and delicate foam, and very stable. In shampoo formulas, CAPB produces a synergistic effect with other surfactants, showing obvious thickening and conditioning effects.

[0054] Polydimethylsiloxane is a high molecular weight organic silicon compound with optical properties, inertness, non-toxicity and non-flammability. In cosmetics, it has low surface tension and high permeability, can quickly penetrate into the skin surface and form a protective film to prevent moisture loss. It can also prevent oxidation of other ingredients in cosmetics and extend the shelf life of the product. Adding polydimethylsiloxane to skin care products can smooth the skin feel, improve stickiness, avoid whitening after applying skin care products, fill fine lines, form a matte finish, and improve appearance.

[0055] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] Preparation method

[0057] Step 1): stir and mix appropriate amounts of deionized water, glycerin, propylene glycol, polydimethylsiloxane, polyglyceryl-10 laurate, sodium chloride and tocopherol, heat in a 70° C. water bath, stir until the solid phase is completely dissolved, and cool to 60° C. to obtain a first mixture.

[0058] Step 2): Sodium cocoyl glutamate, sodium methyl lauroyl taurate and cocamidopropyl betaine are added to the first mixture, and the balance of deionized water is added, heated in a water bath at 60° C., stirred for 20 min, and cooled to 40° C. to obtain a second mixture.

[0059] Step 3): Add the Portulaca oleracea extract and the Centella asiatica extract to the second mixture and stir for 20 minutes to obtain a third mixture.

[0060] Step 4): Hydroxyethyl cellulose, citric acid and potassium sorbate are added to the third mixture, and stirred for 20 minutes, cooled to room temperature and allowed to stand for 24 hours, and then filled to obtain a facial cleanser sample.

[0061] Formula of embodiment 1-14 facial cleanser

[0062] Comparative Example 1 and Examples 1-14 of the facial cleanser are all obtained by the above-mentioned preparation method, and are composed of the following components and their mass percentages. The specific formula is shown in the following table.

[0063] Table 1 Formula table of comparative example 1 and embodiments 1-4

[0064] Ingredients Comparative Example 1 Example 1 Example 2 Example 3 Example 4 glycerin 9 10 10 12 8 Propylene glycol 5 5 7 7 8 Sodium Cocoyl Glutamate 12 12 12 13 13 Sodium Methyl Cocoyl Taurate 5 6 6 5 6 Cocamidopropyl Betaine 5 5 6 5 5 Hydroxyethyl Cellulose 0.5 0.5 0.5 0.5 0.5 Purslane Extract 0.05 2 2 2 2.5 Centella Asiatica Extract 0.05 0.5 0.5 0.5 1 Dimethicone 0.1 0.5 0.4 0.3 0.3 Tocopherol (Vitamin E) 0.1 0.1 0.1 0.1 0.1 Polyglyceryl-10 Laurate 1 1 1 1 1 Sodium chloride 0.8 0.8 0.8 0.8 0.8 Potassium Sorbate 0.5 0.5 0.5 0.5 0.5 Citric acid 0.03 0.03 0.02 0.02 0.02 Deionized water 60.87 56.07 53.18 52.28 53.28

[0065] Table 2 Formulations of Examples 5-14

[0066]

[0067]

[0068] Test Example 1: Evaluation of Usage Effect

[0069] 25 volunteers with sensitive and oily facial skin were screened, aged 20-35 years old, with an average age of 27 years old, and the facial cleansers prepared in Comparative Example 1 and Examples 1-4 were used for test evaluation, 5 in each test group, and the face was washed once a day with warm water at 25-35°C before going to bed, and the amount of facial cleanser used each time was 10g. The face was fully massaged after washing the face, and the facial cleanser stayed on the face for 1 minute, and the above operation was repeated each time. During the test period, no other irritating or soothing products were used on the face. After continuous use for one month, the scores of the following indicators of the facial cleanser were counted: whether there was irritation, cleaning effect, moisturizing effect, and moisturizing degree. The score was based on a 10-point system, with 10 points for obvious effect, 9 points for second, and 1 point for the worst effect. The results are shown in Table 3 below.

[0070] Table 3 Evaluation table of use effect

[0071] Group Is there any stimulation? Cleaning effect Moisturizing effect Moisture Comparative Example 1 0 8 7 7 Example 1 0 9 8 10 Example 2 0 10 9 9 Example 3 0 8 10 8 Example 4 0 9 8 8

[0072] According to the evaluation results in Table 3, it is not difficult to see that the facial cleanser of the present invention has good mildness and moisturizing properties. In-depth analysis shows that the specific plant extracts, specific emollients and moisturizers in the facial cleanser work together to cleverly balance the irritation caused by the surfactants in the formula, and effectively improve the moisturizing ability of the facial cleanser. These three surfactants construct a core cleaning system, and their gentle and efficient cleaning power can penetrate deep into the pores to remove dirt and grease without damaging the barrier of the skin epidermis. This enables the facial cleanser prepared by the present invention to effectively avoid the feeling of tightness on the face after use while achieving good cleaning effects, prevent irritation to the skin, and successfully achieve the effect of gentle cleansing. In addition, the facial cleanser also has good moisturizing, cleaning and moisturizing effects, and the overall use effect score is significantly better than the facial cleanser prepared in Comparative Example 1.

[0073] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0074] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A mild moisturizing facial cleanser, characterized in that: By mass, it contains the following components: 2.0-30.0 parts of moisturizer, 7.0-40.0 parts of surfactant, 0.2-10.0 parts of plant extract, 0.1-1.0 parts of emollient, 0.1-5.0 parts of hydroxyethyl cellulose, 0.01-1.0 parts of vitamin E, 0.01-5.0 parts of polyglyceryl-10 laurate, 0.1-5.0 parts of sodium chloride, 0.01-1.0 parts of potassium sorbate, and 0.01-1.0 parts of citric acid.

2. The facial cleanser according to claim 1, characterized in that: The moisturizing agent is a mixture of glycerin and propylene glycol, and the emollient is polydimethylsiloxane.

3. The facial cleanser according to claim 1, characterized in that: The plant extracts are Centella asiatica extract and Portulaca oleracea extract; The purslane extract and the Centella asiatica extract are both extracted by alcohol extraction; The mass ratio of the Centella asiatica extract to the Portulaca oleracea extract is (0.1-5.0):(0.1-5.0), preferably (0.1-4.0):(0.1-4.0).

4. The facial cleanser according to claim 1, characterized in that: The surfactant is selected from: one or more of sodium cocoyl glutamate, sodium methyl cocoyl taurate, and cocamidopropyl betaine; Preferably, the surfactant is a combination of sodium cocoyl glutamate, sodium methyl cocoyl taurate and cocamidopropyl betaine, wherein the mass ratio of sodium cocoyl glutamate, sodium methyl cocoyl taurate and cocamidopropyl betaine is (8-15):(3-9):(3-8).

5. The facial cleanser according to any one of claims 1 to 4, characterized in that: The invention contains the following components by mass: 1.0-15.0 parts of glycerin, 1.0-15.0 parts of propylene glycol, 5.0-20.0 parts of sodium cocoyl glutamate, 1.0-10.0 parts of sodium methyl cocoyl taurate, 1.0-10.0 parts of cocamidopropyl betaine, 0.1-5.0 parts of hydroxyethyl cellulose, 0.1-5.0 parts of purslane extract, 0.1-5.0 parts of Centella asiatica extract, 0.1-1.0 parts of polydimethylsiloxane, 0.01-1.0 parts of vitamin E, 0.01-5.0 parts of polyglyceryl-10 laurate, 0.1-5.0 parts of sodium chloride, 0.01-1.0 parts of potassium sorbate and 0.01-1.0 parts of citric acid.

6. The facial cleanser according to claim 5, characterized in that: The invention contains the following components by mass: 5.0-15.0 parts of glycerin, 1.0-12.0 parts of propylene glycol, 8.0-15.0 parts of sodium cocoyl glutamate, 3.0-9.0 parts of sodium methyl cocoyl taurate, 3.0-8.0 parts of cocamidopropyl betaine, 0.1-3.0 parts of hydroxyethyl cellulose, 0.1-4.0 parts of purslane extract, 0.1-4.0 parts of Centella asiatica extract, 0.1-1.0 parts of polydimethylsiloxane, 0.01-1.0 parts of vitamin E, 0.5-3.0 parts of polyglyceryl-10 laurate, 0.5-4.0 parts of sodium chloride, 0.01-1.0 parts of potassium sorbate and 0.01-0.8 parts of citric acid.

7. A method for preparing a facial cleanser, characterized in that: The preparation method comprises the following steps: 1) adding ionized water, glycerin, propylene glycol, dimethicone, polyglyceryl-10 laurate, sodium chloride and tocopherol, heating and stirring to obtain a first mixture; 2) adding sodium cocoyl glutamate, sodium methyl lauroyl taurate and cocamidopropyl betaine to the first mixture, heating and stirring to obtain a second mixture; 3) adding the purslane extract and the Centella asiatica extract to the second mixture, stirring to obtain a third mixture; 4) Add hydroxyethyl cellulose, citric acid and potassium sorbate to the third mixture, stir, let the product stand, and fill it to obtain a facial cleanser.

8. The preparation method according to claim 7, characterized in that: The stirring speed is 40 rpm-600 rpm, and the stirring time is 10-30 min.

9. The preparation method according to claim 7, characterized in that: The heating temperature in step 1) is 50-80°C, preferably 70°C; Preferably, the heating temperature in step 2) is 40-80°C, more preferably 60°C.

10. The preparation method according to claim 7, characterized in that: The time required for standing still in step 3) is 16-36 hours.

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