Amino acid cleansing product and preparation method thereof

Abstract

The invention discloses an amino acid cleansing product and a preparation method thereof. The amino acid face cleaning product is prepared from the following raw material components in percentage by mass: 10 to 30 percent of surfactant composition, 1 to 10 percent of amphoteric or nonionic surfactant, 0.05 to 0.5 percent of citric acid, 1 to 5 percent of humectant, 0.5 to 2 percent of isostearyl alcohol, 0.1 to 0.5 percent of phytosterol dimer linoleate, 0.5 to 5 percent of sodium chloride, 0.3 to 1 percent of inulin lauryl carbamate and the balance of water, the surfactant composition comprises a long-chain fatty acyl glycol acid salt. The amino acid face cleansing product keeps uniform appearance under the conditions of high temperature, low temperature and repeated freezing and thawing, has good physical and chemical stability and compatibility, has small damage to a cuticle structure under the condition of realizing sufficient cleaning, and shows good cleaning and mild effects.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, and in particular to an amino acid facial cleanser and its preparation method. Background Technology

[0002] Currently, facial cleansers on the market can be mainly categorized into emulsified cleansers, surfactant-based cleansers, soap-based cleansers, and amino acid-based cleansers, based on their main ingredients and cleansing mechanisms. Amino acid-based cleansers use amino acid surfactants as their primary cleansing ingredient. Their molecular structure is typically weakly anionic (such as N-acyl amino acid salts), or a combination with zwitterionic amino acid surfactants (such as cocamidopropyl betaine). Together, they form a gentle cleansing system that can maintain the lipid barrier of the stratum corneum and the skin's moisture balance to a certain extent. These products can appear as transparent liquids, pearlescent liquids, or slightly emulsified systems with fine foam, suitable for all skin types, especially sensitive or dry skin.

[0003] However, existing amino acid-based facial cleansers still have several shortcomings: Firstly, although amino acid surfactants are mild, their detergency is relatively weak, and they may still be insufficient in removing sebum, makeup, or environmental pollutants. To balance fluidity, skin feel, and foam texture, existing formulations typically add polymeric thickeners (such as polyacrylic acid compounds, hydroxypropyl methylcellulose, etc.) to adjust the system viscosity. However, polymeric thickeners have significant drawbacks in amino acid-based systems: their molecular chains are long, their hydration dependence is strong, and they are easily affected by temperature, pH, and ionic strength. Under low temperature or thermal cycling conditions, they are prone to forming gels, flocs, or precipitates, leading to product turbidity, layering, or decreased fluidity, affecting appearance and user experience. In addition, polymeric thickeners may compete with amino acid surfactants for water, reducing foam fineness and resulting in incomplete rinsing or a sticky, heavy feel, affecting consumer satisfaction. At the same time, polymeric thickeners have strict requirements for dissolution, hydration, and stirring processes, increasing formulation complexity and production costs.

[0004] In summary, amino acid-based facial cleansers still have limitations in terms of cleansing power, gentleness on the skin, and system stability. There is an urgent need for an improved amino acid facial cleanser that can balance gentle cleansing, good foam feel, and low-temperature stability. Summary of the Invention

[0005] To address the problems of low-temperature gelation, poor fluidity, and difficulty in balancing cleansing power and gentleness in existing amino acid facial cleansing products, this invention proposes an amino acid facial cleansing product and its preparation method.

[0006] This invention provides an amino acid facial cleanser, comprising the following raw material components in percentage by weight: The composition includes 10-30% surfactant, 1-10% amphoteric or nonionic surfactant, 0.05-0.5% citric acid, 1-5% humectant, 0.5-2% isostearyl alcohol, 0.1-0.5% phytosterol dimer linoleate, 0.5-5% sodium chloride, 0.3-1% inulin lauryl carbamate, and the balance being water. The surfactant composition includes long-chain fatty acyl glycolate.

[0007] This invention creates a system with multiple synergistic effects. Sterol esters and isostearyl alcohol synergistically form a layered liquid crystal structure, which can effectively stabilize surfactant micelles and reduce interfacial tension, thereby improving the stability and mildness of the system. Simultaneously, inulin lauryl carbamate plays a role in flexible thickening and foam stabilization by forming a weak three-dimensional hydrogen bond network within this layered liquid crystal structure. Unlike traditional methods that rely on rigid gel structures for thickening, this invention gives the system both fluidity and structural stability.

[0008] In this invention, isostearyl alcohol can weaken the excessive association between surfactant molecules, thereby significantly inhibiting low-temperature gelation and maintaining the fluidity of the formulation; one end of phytosterol dimer linoleate can undergo van der Waals interaction with the hydrophobic segment of fatty acyl amino acid salt, while the linoleic acid double bond at the other end provides fluidity and sebum similarity, forming a "flexible interface film"; inulin lauryl carbamate has mild rheological regulation ability in the hydrosol phase, which can improve the viscoelastic stability of the system and prevent gelation, while forming a "saccharide moisturizing film" on the skin surface, improving the smoothness and lasting moisturizing effect of the skin after use.

[0009] In some embodiments, the mass ratio of isostearyl alcohol to phytosterol dimer linoleate is 1:(0.1~0.3), which can achieve an optimal balance between inhibiting gelation, improving system stability and improving skin feel.

[0010] In some embodiments, the long-chain fatty acyl glycolate is any one of lauroyl glycolate, myristoyl glycolate, or cocoyl glycolate; preferably sodium cocoyl glycolate.

[0011] In some embodiments, the surfactant composition further includes an amino acid surfactant.

[0012] In some embodiments, the amino acid surfactant is any one or more of sodium lauroyl aspartate, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium cocoyl glycinate, potassium cocoyl glycinate, sodium lauroyl glutamate, disodium lauroyl glutamate, sodium cocoyl glutamate, or disodium cocoyl glutamate.

[0013] In some embodiments, the humectant is any one or more of glycerin or hydroxyethyl urea; preferably glycerin.

[0014] In some embodiments, the amphoteric or nonionic surfactant is any one or more of lauryl glucoside, sodium cocoamphoacetate, octanoylaminopropyl betaine, or decanoylaminopropyl betaine; preferably lauryl glucoside.

[0015] In some embodiments, the pH of the amino acid facial cleanser is 4.6 to 6.0. This invention controls the pH within the range of 4.5 to 6.0 to ensure stability while also facilitating film formation.

[0016] In some embodiments, the viscosity of the amino acid facial cleanser is 3000 ~ 30000 mPa·s.

[0017] In some embodiments, the amino acid facial cleanser is a facial cleanser milk or facial cleanser cream.

[0018] This invention also provides a method for preparing the aforementioned amino acid facial cleanser, comprising the following steps: (1) Weigh out the surfactant composition, amphoteric or nonionic surfactant, humectant, and citric acid according to their mass percentages to obtain solution 1; (2) Weigh isostearyl alcohol and phytosterol dimer linoleate according to their mass percentages, and heat them at 70~80℃ to dissolve them, to obtain solution 2; (3) Add the solution 2 to the solution 1 under stirring conditions, maintain the system temperature at 50~60℃, and continue stirring until a uniform emulsion system is formed; (4) When the system temperature drops to 35~45℃, add inulin lauryl carbamate and continue stirring for 10~20min to obtain the amino acid facial cleanser.

[0019] In some embodiments, the alkaline solution is a sodium hydroxide solution or a potassium hydroxide solution with a mass fraction of 8% to 12%.

[0020] In some embodiments, the reaction steps are carried out under nitrogen protection, and the nanofiltration membrane has a pore size of 0.1 to 0.5 μm.

[0021] In some embodiments, the preparation method of the long-chain fatty acyl glycolate includes the following steps: (1) In a reaction vessel equipped with a stirring device and an acid gas absorption device, long-chain fatty acyl chloride and glycolic acid are added, wherein the molar ratio of long-chain fatty acyl chloride to glycolic acid is (0.8~1.2):1; (2) Heat to 60-75°C in an oil bath and react with stirring for 1-3 h until the long-chain fatty acyl chlorides are completely reacted; (3) After cooling the reaction solution to room temperature, dilute it with deionized water and adjust the pH to 8.0~9.5 with alkali solution; (4) Continue to add deionized water to adjust the solid content to 15%~25%, and filter to remove insoluble matter; (5) The filtrate is subjected to nanofiltration or dialysis to remove inorganic salts and unreacted raw materials to obtain the long-chain fatty acyl glycolate.

[0022] In summary, compared with the prior art, the present invention achieves the following technical effects: 1. The amino acid facial cleanser of the present invention maintains a uniform appearance under high temperature, low temperature and repeated freeze-thaw conditions, and has good physicochemical stability and compatibility.

[0023] 2. The amino acid facial cleanser of this invention allows the skin barrier to recover quickly after cleansing, with no obvious irritation. Long-term use by volunteers has verified that no discomfort such as erythema, dryness, or tightness was observed, making it suitable for people with sensitive skin.

[0024] 3. The amino acid facial cleanser of this invention produces rich, fine, and stable foam that is easy to rinse off without leaving any residue. After cleansing, the skin surface is smooth and delicate, with improved hydration and an overall refreshing, non-greasy feel.

[0025] 4. The amino acid facial cleanser of the present invention can effectively remove sebum, makeup and external dirt, while achieving thorough cleansing with minimal damage to the stratum corneum structure, exhibiting a good balance between cleansing and gentleness. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] Unless otherwise specified, the experimental methods used in the following examples are conventional methods. Unless otherwise specified, all materials and reagents used are commercially available.

[0028] Raw material source: Cocoyl chloride: Lifan Chemical.

[0029] Lauryl glucoside: Weilen Chemicals.

[0030] Sodium lauroyl sarcosinate: Guangzhou Baifurun Chemical Co., Ltd.

[0031] Citric acid: Jinan Chuangshi Chemical Co., Ltd.

[0032] Moisturizer: Glycerin, commercially available.

[0033] Isostearyl alcohol: CAS No.: 27458-93-1, Rongsheng New Materials.

[0034] Phytosterol dilinoleate: B30231, Shanghai Yuanye Biotechnology.

[0035] Sodium chloride: Commercially available.

[0036] Inulin lauryl carbamate: Wuhan Lanabai.

[0037] Phenoxyethanol: Hubei Weideli.

[0038] Hydroxypropyl methylcellulose: Shanghai Kanglang Biotechnology.

[0039] Lavender fragrance: Commercially available.

[0040] The method for preparing sodium cocoyl glycolate used in this invention is as follows: Add 958.8 g of cocoyl chloride (4.38 mol) and 400 g of glycolic acid (5.26 mol) to a four-necked flask, connect an acidic gas absorption device, and heat the system to 65-70°C in an oil bath while stirring. React for 2 hours until the cocoyl chloride reacts completely. After the reaction is complete, transfer the solution to room temperature, add 2500 g of deionized water, stir to mix, add 2787 g of 10% sodium hydroxide solution (mass fraction) to adjust the pH to between 8.5 and 9.0, then add 660 g of deionized water to adjust the solid content of the solution to 16%-18%. Filter the solution through a 0.45-micron filter to remove the precipitate, and finally pass the solution through a nanofiltration membrane to remove inorganic salts and sodium glycolate. Adjust the solid content of the solution to 25% to obtain sodium cocoyl glycolate.

[0041] This invention provides an amino acid facial cleanser, the components (mass percentage) of which are shown in Table 1. Table 1. Components (%) of the amino acid facial cleansing products in Examples 1-6

[0042] The preparation methods of the amino acid facial cleansing products in Examples 1-6 include the following steps: (1) Weigh out sodium cocoyl glycolate, lauryl glucoside, glycerol, citric acid (and sodium lauroyl sarcosinate) according to their mass percentages to obtain solution 1; (2) Weigh isostearyl alcohol and phytosterol dimer linoleate according to their mass percentages, and heat them at 70~80℃ to dissolve them, to obtain solution 2; (3) Under the condition of stirring speed of 600 rpm, add the solution 2 to the solution 1, maintain the system temperature at 50±2℃, adjust the pH to 5.5, and continue stirring until a uniform emulsion system is formed; (4) When the system temperature drops to 40°C, add inulin lauryl carbamate and continue stirring for 10-20 min to obtain the amino acid facial cleanser.

[0043] Example 7 Based on Example 1, 0.5% phenoxyethanol and 0.001% lavender fragrance were added.

[0044] Comparative Example 1 The difference between this comparative example and Example 1 is that the amount of sodium cocoyl glycolate is reduced to 5%.

[0045] Comparative Example 2 The difference between this comparative example and Example 1 is that the amount of sodium cocoyl glycolate is increased to 40%.

[0046] Comparative Example 3 The difference between this comparative example and Example 1 is that isostearyl alcohol is not added.

[0047] Comparative Example 4 The difference between this comparative example and Example 1 is that the amount of isostearyl alcohol is increased to 5%.

[0048] Comparative Example 5 The difference between this comparative example and Example 1 is that no phytosterol dimer linoleate was added.

[0049] Comparative Example 6 The difference between this comparative example and Example 1 is that the amount of phytosterol dimer linoleate is increased to 1%.

[0050] Comparative Example 7 The difference between this comparative example and Example 1 is that inulin lauryl carbamate is not added.

[0051] Comparative Example 8 The difference between this comparative example and Example 1 is that inulin lauryl carbamate is replaced with hydroxypropyl methylcellulose.

[0052] Test Example 1: System Stability and Low-Temperature Anti-Gelification Test This test case verifies the gelation, separation, or turbidity of Examples 1-7 and Comparative Examples 1-8 under low temperature, freeze-thaw cycles, and accelerated aging (high temperature).

[0053] (1) Observation during low-temperature storage (4℃) Each sample was aliquoted into transparent test tubes (50 mL) and stored at 4±2℃ for 7, 14, and 30 days. The appearance was observed at 7, 14, and 30 days, and the presence of layering, turbidity, crystallization, or gelation was recorded. Simultaneously, the transmittance at 500 nm was measured using a spectrophotometer at 25℃ to quantitatively evaluate the transparency.

[0054] Acceptance criteria: If the transmittance of the sample remains above 70% after 30 days of storage, the system is considered stable.

[0055] Transmittance was measured using a spectrophotometer at 25°C at a wavelength of 500 nm.

[0056] Table 2. Observation results of low-temperature storage (n=3)

[0057] The samples in Examples 1-7 all maintained a stable milky white appearance and high transmittance (above 70%), demonstrating good low-temperature stability. Comparative Example 1 showed slight turbidity but still maintained stability, with transmittance remaining above 74%, meeting the acceptance criteria for low-temperature storage. The samples in Comparative Examples 2, 3, 4, 5, 7, and 8 exhibited significant turbidity, gelation, stratification, or precipitation during low-temperature storage, failing to meet stability requirements, indicating that these formulations have significant stability issues in practical applications.

[0058] (2) Freeze-thaw cycle (-5°C, 25°C) The sample was placed at -5℃ for 24 hours, then transferred to 25℃ and placed for another 24 hours, which was considered one cycle. A total of 3 cycles were performed. Changes in the appearance and viscosity of the sample were recorded during the test.

[0059] Viscosity was measured using a Brookfield rotational viscometer at 25°C.

[0060] The acceptance criteria were: after freeze-thaw cycles, the samples showed no irreversible gelation, stratification, or precipitation, and the viscosity change did not exceed ±25%. The results are shown in Table 3.

[0061] (3) Accelerated aging test (high temperature) The samples were stored in a 45°C incubator for 14 days. Samples were taken at 0, 7, and 14 days to measure changes in appearance, pH value, and viscosity. pH value was measured using a pH meter, and viscosity was measured using a Brookfield rotational viscometer (at 25°C).

[0062] The acceptance criteria were: after 14 days, the sample pH drift should not exceed 0.3, the viscosity change should not exceed ±30%, and there should be no obvious stratification or precipitation in the system; otherwise, it was considered acceptable. The results are shown in Table 3.

[0063] Table 3 Results of freeze-thaw cycle and accelerated aging tests (n=3)

[0064] As shown in the table above, the samples of Examples 1-7 of this invention did not exhibit irreversible gelation or phase separation during freeze-thaw cycles, maintained a milky white or milky appearance, and had viscosity changes within ±25%, meeting the freeze-thaw stability requirements. This indicates that the amino acid facial cleanser of this invention can maintain excellent stability under freeze-thaw conditions, meeting the temperature fluctuation requirements of daily use. However, the formulations of Comparative Examples 2, 3, 4, 5, 7, and 8 showed varying degrees of stability problems after freeze-thaw cycles, such as gelation, turbidity, or stratification, and viscosity changes exceeded ±25%, failing to meet the freeze-thaw stability requirements. This indicates that excessive sodium cocoyl glycolate or inappropriate proportions of auxiliary ingredients can affect the freeze-thaw stability of the product, leading to a decline in formulation performance.

[0065] In accelerated aging tests, Examples 1-7 showed no significant changes in appearance after being stored at 45°C for 14 days, with pH drift less than 0.3 and viscosity changes within ±30%, indicating good stability in the accelerated aging tests. Comparative Examples 2, 3, 4, 5, 7, and 8 failed to meet the accelerated aging stability requirements, particularly in terms of pH drift and viscosity changes. This suggests that improper ingredient ratios or the absence of certain stability-enhancing components can lead to decreased product stability at high temperatures.

[0066] Test Example 2: Foam Performance and Foam Fineness This test case is used to evaluate the foam formation, foam fineness, and foam stability of the samples from Examples 1-7 and Comparative Examples 1-8.

[0067] The sample was prepared into a 3% (w / w) hard water solution (hard water conductivity 208 μS / cm). A certain amount of the sample was placed in a Klürer foam apparatus, and foam was generated by stirring. The average particle size, quantity, height, and height decay of the foam were monitored in real time using optical sensors, and the obtained images were quantitatively analyzed using foam analysis software. The initial particle size (measured immediately after generation), final particle size (after 5 min of stirring), maximum foam volume, and half-life (tBc1 / 2) were recorded.

[0068] The total test duration was 5 minutes, designed to simulate the foaming and cleansing process during actual facial cleansing (typically lasting 2-3 minutes, not exceeding 5 minutes). If the number of bubbles did not decrease by 50% within 5 minutes, the half-life was recorded as "none". The results are shown in the table below. Table 4. Test results of foam performance and foam fineness (n=3)

[0069] Examples 1 through 7 all exhibited high maximum foam volume, with similar initial and final particle sizes, indicating fine and persistent foam. All samples did not decrease the number of bubbles by more than 50% within 5 minutes, demonstrating relatively stable foam suitable for long-term use in cleaning processes.

[0070] Comparative Examples 1 and 6 exhibited relatively poor foam performance. Although their maximum foam volume remained at a high level, their foam particle size was slightly larger, and their half-life was longer, indicating that the foam was relatively coarse and had poor durability. Comparative Examples 2 and 3 showed smaller maximum foam volumes and larger foam particle sizes in the foam performance test, with initial particle sizes exceeding 55 μm and subsequent increases in final particle size. Their short half-life indicated rapid foam decay, resulting in poor cleaning effectiveness and user experience. Comparative Examples 4 and 5 showed poor foam stability, with larger initial foam particle sizes and smaller maximum foam volumes, indicating poor foam quality and durability, and an inability to effectively maintain foam fineness and stability. Comparative Examples 7 and 8 showed poor foam performance, with the lowest maximum foam volume, larger foam particle sizes, and shorter half-lives. Their final foam disappeared quickly, indicating unstable foam performance and affecting cleaning effectiveness.

[0071] Test Example 3: Cleaning Power and Gentleness (1) Sebum removal test and transepidermal water loss (TEWL) recovery test Forty-five healthy volunteers (half male and half female) were selected for testing on the inner forearm skin. First, an equal amount of artificial sebum (formulation containing mineral oil, fatty acid esters, and cholesterol) was evenly applied to the test area. After drying, the area was cleaned for 30 seconds each with the example sample and the comparative sample, and then rinsed thoroughly with warm water. Sebum content was measured before and after washing using a sebum analyzer (Sebumeter SM815), and the sebum removal rate was calculated. Subsequently, the area was cleaned for 1 minute each with the example sample and the comparative sample, and then rinsed thoroughly. Transepidermal water loss (TEWL) was measured using a Tewameter TM300 instrument before cleaning, immediately after cleaning, and 1 hour after cleaning.

[0072] The results are shown in Table 5.

[0073] Table 5 Results of sebum removal rate and TEWL changes

[0074] Table 5 shows that Examples 1-7 exhibited high sebum removal efficiency in the sebum removal test, with removal rates between 85% and 90%, indicating strong cleaning power in removing sebum. In comparison, Comparative Example 1 showed a removal rate of 78%, slightly lower than Example 1, but still achieved a moderate cleaning effect. Comparative Example 2 performed well in sebum removal, achieving a removal rate of 93%, exceeding other samples and demonstrating strong cleaning power. Comparative Examples 3 and 4 had removal rates of 80% and 83%, respectively, representing moderate and gentle cleaning power, but not reaching the cleaning power of the Examples. Comparative Example 5 showed slightly insufficient removal efficiency, with a removal rate of 75%, indicating relatively weak cleaning power. Comparative Examples 7 and 8 had removal rates of 70% and 68%, respectively, the lowest among all samples, indicating weak cleaning power and difficulty in completely removing sebum and dirt from the skin.

[0075] The results of the TEWL (Teaser-to-Waste Water) recovery test showed that the samples of Examples 1-7 effectively protected the skin's moisture barrier, with short TEWL recovery times after cleansing, demonstrating the excellent performance of the formulations of this invention in terms of gentleness and skin hydration protection. Comparative Examples 2 and 3 showed slower recovery times. Comparative Examples 1, 5, and 7 also showed weak hydration and longer recovery times, indicating that these formulations had poor skin barrier protection effects. Comparative Example 8 performed the worst, with poor skin hydration and a long recovery time after cleansing, suggesting that this formulation may not be suitable for daily use requiring skin hydration protection. In summary, the samples of Examples 1-7 effectively protected the skin barrier and reduced moisture loss while cleansing, demonstrating a good balance between gentleness and cleansing power. The comparative samples, especially those with high concentrations of cleansing ingredients, performed poorly in terms of hydration, which may lead to skin dryness and discomfort.

[0076] (3) Subjective sensations of the skin Thirty volunteers were recruited to rate the skin feel of the facial cleanser on a scale of 0 to 5, based on the product's appearance before and after use. The evaluation criteria were as follows: ① Size of skin residue after washing (0 points for no residue, 5 points for severe residue); ②Is it irritating? ③ Does the skin feel tight and dry after washing? ④ Moisturizing effect after washing; ⑤ Willingness to use daily.

[0077] Table 6. Scores of Subjective Skin Feelings

[0078] Table 6 shows that Examples 1-7 all exhibited relatively mild subjective ratings. Particularly in the ratings for "post-wash moisturization" and "whether the skin feels tight or dry," the average scores were all 3 points or higher, indicating that these formulas performed well in terms of skin feel after cleansing, maintaining skin's moisture and comfort while cleansing. In other words, Examples 1-7 achieved a good balance between skin comfort, cleansing power, and gentleness, providing a more pleasant cleansing experience.

[0079] In comparison, Comparative Examples 1 and 5 showed lower scores in the "post-wash residue" and "tightness / dryness" categories, indicating that these two formulas may cause noticeable tightness or discomfort after cleansing, and have low moisturizing effects, resulting in lower willingness to use them daily. Comparative Example 2 showed low skin moisturizing effects, strong tightness, and relatively high post-wash residue, indicating that excessively strong cleansing effects may burden the skin and affect the user experience. Comparative Examples 3 and 4, while having low post-wash residue, had poor moisturizing effects, making their user experience inferior to the Example Group. Comparative Examples 7 and 8 had high post-wash residue and low moisturizing scores, along with slight irritation. This indicates that these two formulas are significantly lacking in post-cleansing comfort and moisturizing, resulting in a poor user experience. This suggests that the comparative examples experienced varying degrees of discomfort and are not suitable for long-term or frequent use.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An amino acid cleansing product, characterized by, The raw material components include the following by mass percentage: 10-30% of a surfactant composition, 1-10% of an amphoteric or nonionic surfactant, 0.05-0.5% of citric acid, 1-5% of a humectant, 0.5-2% of isostearyl alcohol, 0.1-0.5% of phytosteryl dimer dilinoleate, 0.5-5% of sodium chloride, 0.3-1% of inulin lauryl carbamate, and the balance of water; The surfactant composition includes a long-chain fatty acyl glycolate.

2. The amino acid cleanser product according to claim 1, characterized by, The mass ratio of the isostearyl alcohol to the phytosteryl dimer dilinoleate is 1: (0.1-0.3).

3. The amino acid cleanser product according to claim 1, wherein The long-chain fatty acyl glycolate is any one of lauroyl glycolate, myristoyl glycolate, or cocoyl glycolate.

4. The amino acid cleanser product of claim 1, wherein, The surfactant composition further includes an amino acid surfactant.

5. The amino acid cleanser product of claim 4, wherein, The amino acid surfactant is any one or more of sodium lauroyl aspartate, sodium lauroyl methylate, sodium cocoyl methylate, sodium cocoyl glycinate, potassium cocoyl glycinate, sodium lauroyl glutamate, disodium lauroyl glutamate, sodium cocoyl glutamate, or disodium cocoyl glutamate.

6. The amino acid cleanser product of claim 1, wherein, The humectant is any one or more of glycerin or hydroxyethyl urea.

7. The amino acid cleanser product of claim 1, wherein, The amphoteric or nonionic surfactant is any one or more of lauryl glucoside, sodium cocamphoacetate, capryl amido propyl betaine, or decanoyl amido propyl betaine.

8. The amino acid cleanser product of claim 1, wherein, The pH of the amino acid cleansing product is 4.6-6.

0.

9. The amino acid cleanser product of claim 1, wherein, The amino acid cleansing product is a cleansing milk or a cleansing paste.

10. The method of producing the amino acid cleansing product according to any one of claims 1 to 9, characterized by, The method includes the following steps: (1) weighing the surfactant composition, the amphoteric or nonionic surfactant, the humectant, and the citric acid by mass percentage to obtain solution 1; (2) weighing the isostearyl alcohol and the phytosteryl dimer dilinoleate by mass percentage, and heating and melting at 70-80°C to obtain solution 2; (3) adding the solution 2 to the solution 1 under stirring, maintaining the system temperature at 50-60°C, and continuing to stir until a uniform emulsion system is formed; (4) when the system temperature drops to 35-45°C, adding the inulin lauryl carbamate, and continuing to stir for 10-20 min to obtain the amino acid cleansing product.

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