A gel-like makeup remover and a method for preparing the same

Abstract

The application discloses jelly-like makeup remover and a preparation method thereof, and relates to the technical field of cosmetic preparation. The jelly-like makeup remover comprises the following components in percentage by mass of the makeup remover: 25-30% of a rubbing agent, 16-20% of a moisturizing agent, 4-4.5% of a thickening agent, 3-7% of an anionic surfactant, 1.2-1.8% of a preservative, 0.04-0.06% of a chelating agent and appropriate water; wherein the rubbing agent comprises sea salt; the thickening agent comprises a konjac gum and NaCl in a mass ratio of (1.15-1.25):(2.85-3.25); and the anionic surfactant comprises rhamnolipid. The application improves the cleaning capacity of the makeup remover by using rhamnolipid in combination with sea salt, improves the stability of the system by using the thickening agent composed of konjac gum and NaCl, and improves the stability and cleaning capacity of the makeup remover by using the moisturizing agent and other components.

Description

Technical Field

[0001] This invention relates to the field of cosmetic preparation technology, and in particular to a gel-like makeup remover and its preparation method. Background Technology

[0002] In makeup remover systems, salt components can provide gentle physical friction during wiping, helping to remove stubborn makeup residue adhering to the skin's surface. However, industry professionals generally believe that a high-salt environment can damage the micellar structure of surfactants, leading to micellar disintegration, surfactant precipitation, and a "fragmented" state, resulting in a loss of emulsifying and cleansing ability. Simultaneously, a high-salt environment may also cause incompatibility with thickeners, disrupting the three-dimensional network structure formed by the thickener, leading to product stratification, sedimentation, and instability. Therefore, limited by these technical challenges, existing technologies have consistently failed to overcome the bottleneck of salt concentration, resulting in insufficient cleansing power in makeup removers.

[0003] Therefore, traditional techniques need to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide a gel-like makeup remover and its preparation method, which overcomes the defects of product stratification, sedimentation and poor stability caused by the above-mentioned high-salt environment.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a gel-like makeup remover, comprising, by weight percentage: 25%~30% abrasive, 16%~20% moisturizer, 4%~4.5% thickener, 3%~7% anionic surfactant, 1.2%~1.8% preservative, 0.04%~0.06% chelating agent, and an appropriate amount of water; wherein the abrasive includes sea salt; the thickener includes gellan gum and NaCl in a weight ratio of (1.15~1.25):(2.85~3.25); and the anionic surfactant includes rhamnolipid.

[0006] Compared with the prior art, the present invention creatively increases the concentration of sea salt in the gel-like makeup remover to a high concentration of 25%~30%. At this point, the friction of the high concentration of sea salt forms submicron cracks on the surface of the makeup film, disrupting the continuity of the waterproof ingredients and facilitating the removal of waterproof makeup. Building on this, the inventors accidentally discovered that when rhamnolipids are chosen as the surfactant, the hypertonic environment created by high-concentration sea salt not only does not damage the micelle structure of rhamnolipids, but also compresses the micelle double layer of rhamnolipids. On the one hand, the compressed micelle double layer presents an integral gel-like structure, improving the stability of the system. On the other hand, the compressed micelle double layer can instantly penetrate submicron fissures, rapidly emulsifying hydrophobic substances within the fissures and further expanding the fissure size, forming a positive cycle of physical destruction → chemical removal → physical re-destruction, ultimately improving the removal rate of waterproof makeup. Moreover, rhamnolipids themselves have an extremely low critical micelle concentration, which can play a cleaning role at low concentrations, and their biocompatibility is much higher than that of sulfates. Unlike traditional surfactants, they do not need to be in contact with the skin at high concentrations for a long time to remove oil and dirt. Therefore, the combination of rhamnolipids and high-concentration sea salt has a built-in barrier repair function, reducing the potential irritation of the overall formula without the need to add additional soothing ingredients. Meanwhile, considering that high concentrations of sea salt may cause moisture loss in the stratum corneum of the skin and damage to the activity of active ingredients by metal ions, the inventors also added moisturizers and chelating agents to further improve the stability of the formula system and its moisturizing and soothing effects.

[0007] Furthermore, this invention uses gellan gum and NaCl as thickeners because the inventors unexpectedly discovered that gellan gum requires cations to activate it in order to form a three-dimensional network gel structure. NaCl and high concentrations of sea salt provide an excess of cations, significantly strengthening and stabilizing the three-dimensional network structure of gellan gum. At this point, the nano-sized micelles formed by rhamnolipids compressed by the high concentration of sea salt can smoothly embed themselves in the three-dimensional network structure, co-suspending the sea salt microcrystals, greatly improving the stability of the system and preventing stratification and sedimentation.

[0008] Therefore, this invention, based on high-concentration sea salt, combines it with rhamnolipid to enhance its cleaning ability, uses a thickener composed of gellan gum and NaCl to improve the stability of the system, and supplements it with the moisturizing effect of a humectant, the chelating effect of a chelating agent, and the preservative effect of a preservative, all of which together improve the stability, soothing effect, and cleaning power of the makeup remover.

[0009] Furthermore, the moisturizer comprises erythritol, glycerin and butylene glycol in a mass ratio of (4~5):(7~9):(5~6).

[0010] Compared with the prior art, the present invention selects the above-mentioned specific proportions of components as moisturizers, which not only offsets the dehydration disadvantages of high-salt environments, but also enhances the soothing effect of the product.

[0011] Furthermore, the anionic surfactant also includes at least one of disodium lauroyl glutamate and sodium cocoyl glutamate.

[0012] Compared with the prior art, the present invention adds the above-mentioned components as surfactants to the basis of rhamnolipid. The anionic surfactants of the above-mentioned specific composition can further enhance the emulsifying and cleaning power of waterproof makeup by combining with high concentration of sea salt, and improve the stability of the system.

[0013] Furthermore, the preservative comprises 1,2-hexanediol and p-hydroxyacetophenone in a mass ratio of (0.8~1.2):(0.4~0.6).

[0014] Compared with the prior art, the present invention selects the above-mentioned components in a specific mass ratio as preservatives, which can effectively inhibit the growth of microorganisms and ensure the safety of makeup remover during storage and use; and 1,2-hexanediol and p-hydroxyacetophenone have excellent mildness, which can further avoid the irritation of makeup remover.

[0015] Furthermore, the chelating agent includes at least one of EDTA-2Na and EDTA-4Na.

[0016] Compared with the prior art, the present invention selects EDTA-2Na or EDTA-4Na as a chelating agent, which can effectively chelate metal ions such as calcium and magnesium in the system, avoid them from reacting with anionic surfactants, thickeners and other components to form precipitates, and ensure the stability of the system.

[0017] Secondly, the present invention provides a method for preparing a gel-like makeup remover, which includes the following steps: Weigh each component according to the composition and proportions of the described gel-like makeup remover; The water, the chelating agent, and the humectant in the first part are mixed, stirred and dissolved, and then heated to 80°C~85°C to obtain phase A; Mix a portion of the thickener and the second portion of the humectant, disperse them, add them to phase A, and stir to obtain phase B; Add the remaining thickener and the third part of the humectant to phase B, stir, and cool to 60°C~65°C to obtain phase C; The anionic surfactant and the preservative are added to phase C, stirred, and cooled to 50°C~55°C to obtain phase D; At 2℃-5℃, the abrasive is added to phase D under stirring until a gel-like consistency is formed. Stirring is then stopped, and the mixture is allowed to stand to obtain the target gel-like makeup remover. It should be understood that the abrasive should be added to phase D rapidly, at a rate of 1.5g~2g / s.

[0018] Compared with the prior art, in the preparation of gel-like makeup remover, the present invention first mixes water, chelating agent and first part moisturizer, stirs and dissolves and then heats to 80℃~85℃. At this time, the high temperature environment promotes the full dissolution of chelating agent and quickly chelates metal ions in water, avoiding the reaction of subsequent raw materials with metal ions to generate impurities, and at the same time allows the first part moisturizer to be evenly dispersed. Next, a portion of the thickener is mixed and dispersed with the second portion of the humectant before being added. This process allows some of the thickener to be pre-dispersed with the humectant, laying the groundwork for the formation of the subsequent three-dimensional gel network structure and improving thickening efficiency. Subsequently, the remaining thickener and the third portion of the humectant are added, gradually forming a stable gel network structure with the pre-added thickener. Then, anionic surfactants and preservatives are added, and the temperature is lowered to 50℃~55℃ to ensure that the anionic surfactants are fully dissolved and form uniform micelles, avoiding the destruction of the preservative activity by high temperature. Finally, at a low temperature of 2℃~5℃, under stirring, the abrasive is quickly added until a gel is formed, stirring is stopped, and the mixture is allowed to stand. At this low temperature, the dissolution of sea salt is inhibited, the microcrystal morphology of sea salt is maintained, and the three-dimensional gel network structure of the thickener is strengthened and stabilized. This facilitates the smooth embedding of rhamnolipid nanomicelles into this three-dimensional gel network structure, jointly suspending the sea salt microcrystals, thus improving the stability and cleaning power of the system. It is worth noting that the present invention adds a thickener first and then an abrasive. This is because the NaCl in the thickener can first optimize the gellan gum network, improve the salt resistance of the gellan gum network, and make the whole system hard first and then soft, but not collapse. Then, when a high concentration of sea salt is added, the gel system does not collapse, thus improving the stability of the gel system.

[0019] Furthermore, the moisturizer in the first part is erythritol, and the stirring speed for mixing and dissolving the water, the chelating agent, and the moisturizer in the first part is 400 rpm to 500 rpm.

[0020] Compared with the prior art, the present invention selects erythritol as the first part of the moisturizer and uses the above-mentioned stirring speed to mix and dissolve water, chelating agent and the first part of the moisturizer. This can ensure that erythritol dissolves quickly and chelating agent is fully dispersed, avoiding raw material agglomeration that affects subsequent mixing. It can also be combined with high temperature to allow the chelating agent to efficiently chelate metal ions in water, laying a solid foundation for the stability of the subsequent system. At the same time, the early incorporation of erythritol can initially adjust the solvent environment, which is conducive to the compatibility of subsequent components.

[0021] Furthermore, part of the thickener is gellan gum; the second part of the humectant is glycerin; the stirring speed for adding the mixed and dispersed thickener and the second part of the humectant to phase A is 400 rpm to 500 rpm.

[0022] Compared with the prior art, the present invention selects gellan gum as one part of the thickener and glycerin as the second part of the humectant, and uses the above-mentioned stirring speed to mix and disperse the thickener and the second part of the humectant. This allows the gellan gum to be fully pre-dispersed in glycerin, avoiding direct aggregation upon water addition. At the same time, it ensures that the gellan gum is uniformly integrated with water and erythritol in phase A, laying a good foundation for the formation of the subsequent three-dimensional network structure. The early addition of glycerin can also help adjust the polarity of the system and improve the swelling efficiency of the gellan gum.

[0023] Furthermore, the remaining thickener includes NaCl; the third part of the humectant includes butanediol; and the stirring speed after adding the remaining thickener and the third part of the humectant to phase B is 400 rpm to 500 rpm.

[0024] Compared with the prior art, the present invention adds NaCl and butanediol simultaneously, and mixes and stirs NaCl and butanediol at the above-mentioned stirring speed to ensure uniform dispersion of NaCl and avoid localized Na+ dispersion. + Excessive concentration disrupts the initial swelling structure of gellan gum, while allowing butanediol to fully integrate with the system, laying the foundation for subsequent system stability.

[0025] Furthermore, the stirring speed for adding the anionic surfactant and the preservative to the C phase is 400 rpm to 500 rpm.

[0026] Compared with the prior art, the present invention, when using the above-mentioned stirring speed, can fully dissolve the anionic surfactant and form uniform micelles, while ensuring the uniform dispersion of the preservative, guaranteeing the preservative effect, and avoiding skin irritation caused by excessively high local concentrations of the preservative.

[0027] Furthermore, the stirring speed for adding the friction agent to the D phase under stirring conditions is 500 rpm to 700 rpm.

[0028] Compared with the prior art, when the present invention adopts the above-mentioned stirring speed, it can avoid the agglomeration or local accumulation of friction agent, which leads to system stratification and sedimentation, and finally forms a stable gel-like product. Attached Figure Description

[0029] Appendix Figure 1 This is a photograph of the gel-like makeup remover prepared in Example 5. Detailed Implementation

[0030] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0031] High-salt environments can disrupt the micellar structure of surfactants, leading to micelle disintegration and surfactant precipitation, resulting in a "fragmented" system and loss of emulsifying and cleaning capabilities. Simultaneously, high-salt environments may also cause incompatibility with thickeners, disrupting the three-dimensional network structure formed by the thickener, leading to product stratification, sedimentation, and instability. Therefore, limited by these technical challenges, current technologies have consistently failed to overcome the bottleneck of salt concentration, resulting in insufficient cleansing power in makeup removers.

[0032] To overcome the above-mentioned defects, in a first aspect, embodiments of the present invention provide a gel-like makeup remover, comprising, by weight percentage: 25%~30% abrasive, 16%~20% moisturizer, 4%~4.5% thickener, 3%~5% anionic surfactant, 1.4%~1.6% preservative, 0.04%~0.06% chelating agent, and an appropriate amount of water; wherein, the abrasive includes sea salt; the thickener includes gellan gum and NaCl in a weight ratio of (1.15~1.25):(2.85~3.25); and the anionic surfactant includes rhamnolipid.

[0033] For example, a gel-like makeup remover comprises, by weight percentage: 27% sea salt, 16% moisturizer, 4.5% thickener, 3% rhamnolipid, 1.6% preservative, 0.04% chelating agent, and 47.86% water; wherein the thickener comprises gellan gum and NaCl in a weight ratio of 1.25:3.25.

[0034] For example, a gel-like makeup remover comprises, by weight percentage: 26% sea salt, 20% moisturizer, 4% thickener, 5% rhamnolipid, 1.4% preservative, 0.06% chelating agent, and 43.54% water; wherein the thickener comprises gellan gum and NaCl in a weight ratio of 1.15:2.85.

[0035] For example, a gel-like makeup remover comprises, by weight percentage: 25% sea salt, 18% moisturizer, 4.2% thickener, 4% rhamnolipid, 1.5% preservative, 0.05% chelating agent, and 47.25% water; wherein the thickener comprises gellan gum and NaCl in a weight ratio of 1.2:3.

[0036] For example, a gel-like makeup remover comprises, by weight percentage: 30% sea salt, 18% moisturizer, 4.2% thickener, 4% rhamnolipid, 1.5% preservative, 0.05% chelating agent, and 42.25% water; wherein the thickener comprises gellan gum and NaCl in a weight ratio of 1.2:3.

[0037] When using the above technical solution, the frictional effect of high-concentration sea salt forms submicron cracks on the surface of the makeup film, disrupting the continuity of the waterproof ingredients and thus removing waterproof makeup. Simultaneously, the high-permeability environment created by the high-concentration sea salt compresses the micellar double layer of rhamnolipin, enhancing the system's stability. Furthermore, the compressed micellar double layer instantly penetrates the submicron cracks, rapidly emulsifying the hydrophobic substances within the cracks and further expanding the crack size, forming a positive cycle of physical destruction → chemical removal → further physical destruction, ultimately improving the removal rate of waterproof makeup. In addition, the combination of rhamnolipin and high-concentration sea salt has a built-in barrier repair function, reducing the potential irritation of the overall formula. NaCl and high-concentration sea salt provide excess cations, greatly strengthening and stabilizing the three-dimensional network structure of gellan gum. At this point, the nano-sized micelles formed by rhamnolipin are smoothly embedded in the three-dimensional network structure, jointly suspending the sea salt microcrystals, greatly improving the system's stability and preventing stratification and sedimentation. Therefore, this invention uses high-concentration sea salt and rhamnolipid to enhance cleansing ability, uses gellan gum and NaCl as thickeners to improve system stability, and supplements the moisturizing effect of humectants and the chelating effect of chelating agents to jointly improve the stability, soothing and cleansing power of the makeup remover.

[0038] In some embodiments, the humectant comprises erythritol, glycerin and butylene glycol in a mass ratio of (4~5):(7~9):(5~6).

[0039] For example, the mass ratio of erythritol, glycerol and butylene glycol can be specifically selected as 4:7:5, 5:9:6, 5:8:5, 4.5:8:5.5 or any range of values, preferably 5:8:5.

[0040] When the above technical solution is adopted, the dehydration drawbacks of a high-salt environment are offset, and the soothing effect of the product is enhanced.

[0041] In some embodiments, the anionic surfactant further includes at least one of disodium lauroyl glutamate and sodium cocoyl glutamate.

[0042] For example, the anionic surfactant comprises rhamnolipid and disodium lauroyl glutamate in a mass ratio of (3~5):(1~2).

[0043] As a further example, the mass ratio of rhamnolipid to disodium lauroyl glutamate can be specifically chosen as 3:1, 4:2, or 5:1.5.

[0044] For example, the anionic surfactant comprises rhamnolipid and sodium cocoyl glutamate in a mass ratio of (3~5):(1~2).

[0045] As a further example, the mass ratio of rhamnolipid to sodium cocoyl glutamate can be specifically chosen as 3:1, 4:2, or 5:1.5.

[0046] When using the above technical solution, the anionic surfactant is further combined with high-concentration sea salt to enhance the emulsification and cleaning power of waterproof makeup and improve the stability of the system.

[0047] In some embodiments, the preservative comprises 1,2-hexanediol and p-hydroxyacetophenone in a mass ratio of (0.8~1.2):(0.4~0.6).

[0048] For example, the mass ratio of 1,2-hexanediol and p-hydroxyacetophenone can be specifically selected as a range of values ​​consisting of 0.8:0.4, 0.9:0.6, 0.9:0.5, 1.2:0.4, 1:0.5, or any point values, preferably 1:0.5.

[0049] When the above technical solution is adopted, the growth of microorganisms is effectively inhibited, ensuring the safety of the makeup remover during storage and use, and avoiding the irritation of the makeup remover.

[0050] In some embodiments, the chelating agent includes at least one of EDTA-2Na and EDTA-4Na.

[0051] When the above technical solution is adopted, the calcium, magnesium and other metal ions in the system are effectively chelated, ensuring the stability of the system.

[0052] Secondly, embodiments of the present invention provide a method for preparing a gel-like makeup remover, comprising the following steps: Weigh each component according to the ingredients and proportions of the gel-type makeup remover; Water, chelating agent, and first-part humectant are mixed, stirred to dissolve, and then heated to 80℃~85℃ to obtain phase A; Mix a portion of the thickener and the second portion of the humectant, disperse them, add them to phase A, and stir to obtain phase B; Add the remaining thickener and the third part of the humectant to phase B, stir, and cool to 60℃~65℃ to obtain phase C; Anionic surfactant and preservative were added to phase C, stirred, and cooled to 50℃~55℃ to obtain phase D; At 2℃-5℃, an abrasive is added to phase D while stirring until a gel-like consistency is formed. Stirring is then stopped, and the mixture is allowed to stand to obtain the target gel-like makeup remover.

[0053] It should be understood that when adding friction agent to the D phase, it should be added quickly at a rate of 1.5 g to 2 g / s.

[0054] For example, the temperature at which the water, chelating agent, and first-part humectant are mixed, stirred, and dissolved, can be selected as a range of values ​​including 80°C, 82°C, 85°C, or any combination of these values, with 82°C to 85°C being the preferred range.

[0055] For example, the remaining thickener and the third part of the humectant are added to phase B. The temperature after stirring and cooling can be selected as a range of values ​​consisting of 60°C, 62°C, 65°C or any point value, preferably 60°C~62°C.

[0056] For example, anionic surfactants and preservatives are added to phase C. The temperature after stirring and cooling can be selected as a range of values, such as 50°C, 52°C, 55°C, or any combination of these values, preferably 50°C to 52°C.

[0057] For example, the temperature at which the friction agent is added to the D phase under stirring can be selected as a range of values ​​consisting of 2°C, 4°C, 5°C, or any point value, preferably 4°C to 5°C.

[0058] For example, the addition rate of the friction agent to the D phase can be specifically selected as a range of values ​​consisting of 1.5g, 1.8g / s, 2g / s, or any point value, preferably 1.8g / s to 2g / s.

[0059] When using the above technical solution, water, chelating agent and first part of moisturizer are first mixed, stirred and dissolved, and then heated to 80℃~85℃. The high temperature environment promotes the full dissolution of chelating agent and rapid chelation of metal ions in water, avoiding the reaction of subsequent raw materials with metal ions to generate impurities, while allowing the first part of moisturizer to be evenly dispersed. Next, a portion of the thickener and the second portion of the humectant are mixed and dispersed before being added, allowing for pre-dispersion of the thickener and humectant. This lays the groundwork for the formation of the subsequent three-dimensional gel network structure and improves thickening efficiency. Subsequently, the remaining thickener and the third portion of the humectant are added, gradually forming a stable gel network structure with the pre-added thickener. Then, anionic surfactants and preservatives are added, and the temperature is lowered to 50℃~55℃ to ensure that the anionic surfactants are fully dissolved and form uniform micelles, avoiding damage to the preservative activity of the preservatives due to high temperatures. Finally, at a low temperature of 2℃~5℃, under stirring, the abrasive is quickly added until a gel is formed, then stirring is stopped and the mixture is allowed to stand. This low-temperature environment inhibits the dissolution of sea salt, maintains the microcrystalline morphology of sea salt, and thus strengthens and stabilizes the three-dimensional gel network structure of the thickener. This facilitates the smooth embedding of rhamnolipid nanoparticles into this three-dimensional gel network structure, jointly suspending the sea salt microcrystals, thereby improving the stability and cleaning power of the system. It is worth noting that in the above technical solution, a thickener is added first, followed by an abrasive. The NaCl in the thickener can first optimize the gellan gum network, improve the salt resistance of the gellan gum network, and make the whole system hard first and then soft, but it will not collapse. Then, when a high concentration of sea salt is added, the gel system does not collapse, thus improving the stability of the gel system.

[0060] In some embodiments, the mass ratio of the first part moisturizer, the second part moisturizer, and the third part moisturizer is (4-5):(7~9):(5-6).

[0061] In some embodiments, the first humectant is erythritol, and the stirring speed for mixing and dissolving water, chelating agent, and the first humectant is 400 rpm to 500 rpm.

[0062] For example, the stirring speed for mixing and dissolving water, chelating agent, and first-part humectant can be specifically selected as a range of values ​​consisting of 400 rpm, 450 rpm, 500 rpm, or any point value, preferably 450 rpm to 500 rpm.

[0063] When the above technical solution is adopted, it not only ensures the rapid dissolution of erythritol and the full dispersion of the chelating agent, thus avoiding the agglomeration of raw materials, but also allows the chelating agent to efficiently chelate metal ions in water at high temperature, laying a solid foundation for the stability of the subsequent system; the early incorporation of erythritol preliminarily adjusts the solvent environment, which is conducive to the compatibility of subsequent components.

[0064] In some embodiments, a portion of the thickener is gellan gum; a second portion of the humectant is glycerin; and the stirring speed for adding the mixed and dispersed thickener and humectant to phase A is 400 rpm to 500 rpm.

[0065] For example, the stirring speed after mixing and dispersing part of the thickener and the second part of the humectant can be specifically selected as a range of values ​​consisting of 400 rpm, 450 rpm, 500 rpm, or any point value, preferably 450 rpm to 500 rpm.

[0066] When the above technical solution is adopted, gellan gum is fully pre-dispersed in glycerol to avoid direct aggregation upon water introduction. At the same time, it ensures that gellan gum is uniformly integrated with water and erythritol in phase A, laying a good foundation for the subsequent formation of the three-dimensional network structure. The early addition of glycerol can also help adjust the polarity of the system and improve the swelling efficiency of gellan gum.

[0067] In some embodiments, the remaining thickener includes NaCl; the third humectant includes butanediol; and the stirring speed after adding the remaining thickener and the third humectant to phase B is 400 rpm to 500 rpm.

[0068] For example, the stirring speed after adding the remaining thickener and the third part of the humectant to phase B can be specifically selected as a range of values ​​consisting of 400 rpm, 450 rpm, 500 rpm, or any point value, preferably 450 rpm to 500 rpm.

[0069] The above technical solution ensures uniform dispersion of NaCl and avoids localized Na+ contamination. + Excessive concentration disrupts the initial swelling structure of the gellan gum, laying the foundation for the stability of the subsequent system.

[0070] In some embodiments, the stirring speed for adding anionic surfactants and preservatives to the C phase is 400 rpm to 500 rpm.

[0071] For example, the stirring speed when adding anionic surfactants and preservatives to the C phase can be specifically selected as a range of values ​​consisting of 400 rpm, 450 rpm, 500 rpm, or any point value, preferably 450 rpm to 500 rpm.

[0072] When the above technical solution is adopted, the anionic surfactant is fully dissolved and forms uniform micelles, while the preservative is uniformly dispersed, ensuring the anti-corrosion effect.

[0073] In some embodiments, the stirring speed for adding the friction agent to the D phase under stirring conditions is 500 rpm to 700 rpm.

[0074] For example, the stirring speed when adding the friction agent to the D phase under stirring conditions can be specifically selected as a range of values ​​consisting of 500 rpm, 600 rpm, 700 rpm, or any point value, preferably 600 rpm to 700 rpm.

[0075] When the above technical solution is adopted, the agglomeration or local accumulation of friction agent is avoided, which leads to system stratification and sedimentation, and finally a stable gel-like product is formed.

[0076] To better illustrate the technical solution of the present invention, the following specific embodiments are also provided. It should be understood that, unless otherwise specified, all raw materials used in the following embodiments are commercially available.

[0077] Example 1 A gel-like makeup remover, comprising, by weight percentage: 27% sea salt, 4% erythritol, 7% glycerin, 5% butylene glycol, 1.25% gellan gum, 3.25% NaCl, 3% rhamnolipid, 1.2% 1,2-hexanediol, 0.4% p-hydroxyacetophenone, 0.04% EDTA-2Na, and 47.86% water.

[0078] The preparation process of the above-mentioned gel-like makeup remover includes the following steps: Weigh each component according to the above proportions; Water, EDTA-2Na, and erythritol were mixed and stirred at 400 rpm until dissolved, then heated to 80°C to obtain phase A. After mixing and dispersing gellan gum and glycerin, the mixture was added to phase A and stirred at a stirring speed of 400 rpm to obtain phase B. NaCl and butanediol were added to phase B, and the mixture was stirred at a speed of 400 rpm and then cooled to 60°C to obtain phase C. Rhamnolipid, 1,2-hexanediol, and p-hydroxyacetophenone were added to phase C, stirred at 400 rpm, and cooled to 50°C to obtain phase D. Sea salt was added to phase D at 2°C and 500 rpm until a gel-like consistency was formed. Stirring was then stopped, and the mixture was allowed to stand to obtain the target gel-like makeup remover.

[0079] Example 2 A gel-like makeup remover, comprising, by weight percentage: 26% sea salt, 5% erythritol, 9% glycerin, 6% butylene glycol, 1.15% gellan gum, 2.85% NaCl, 5% rhamnolipid, 0.9% 1,2-hexanediol, 0.5% p-hydroxyacetophenone, 0.06% EDTA-4Na, and 43.54% water.

[0080] The preparation process of the above-mentioned gel-like makeup remover includes the following steps: Weigh each component according to the above proportions; Water, EDTA-4Na, and erythritol were mixed and stirred at 500 rpm until dissolved, then heated to 85°C to obtain phase A. After mixing and dispersing gellan gum and glycerin, the mixture was added to phase A and stirred at a stirring speed of 500 rpm to obtain phase B. NaCl and butanediol were added to phase B, and the mixture was stirred at a speed of 500 rpm and then cooled to 65°C to obtain phase C. Rhamnolipid, 1,2-hexanediol, and p-hydroxyacetophenone were added to phase C, stirred at 500 rpm, and cooled to 55°C to obtain phase D. Sea salt was added to phase D at 5°C and 700 rpm until a gel-like consistency was formed. Stirring was then stopped, and the mixture was allowed to stand to obtain the target gel-like makeup remover.

[0081] Example 3 A gel-like makeup remover, comprising, by weight percentage: 25% sea salt, 5% erythritol, 8% glycerin, 5% butylene glycol, 1.2% gellan gum, 3% NaCl, 4% rhamnolipid, 1,2-hexanediol, 0.5% p-hydroxyacetophenone, 0.05% EDTA-2Na, and the balance being water.

[0082] The preparation process of the above-mentioned gel-like makeup remover includes the following steps: Weigh each component according to the above proportions; Water, EDTA-2Na, and erythritol were mixed and stirred at 450 rpm until dissolved, then heated to 82°C to obtain phase A. After mixing and dispersing gellan gum and glycerin, the mixture was added to phase A and stirred at a stirring speed of 450 rpm to obtain phase B. NaCl and butanediol were added to phase B, and the mixture was stirred at a stirring speed of 450 rpm and cooled to 62 °C to obtain phase C. Rhamnolipid, 1,2-hexanediol, and p-hydroxyacetophenone were added to phase C, stirred at 450 rpm, and cooled to 52°C to obtain phase D. Sea salt was added to phase D at 4°C and 600 rpm until a gel-like consistency was formed. Stirring was then stopped, and the mixture was allowed to stand to obtain the target gel-like makeup remover.

[0083] Example 4 A gel-like makeup remover, comprising, by weight percentage: 30% sea salt, 4.5% erythritol, 8% glycerin, 5.5% butylene glycol, 1.2% gellan gum, 3% NaCl, 4% rhamnolipid, 0.9% 1,2-hexanediol, 0.6% p-hydroxyacetophenone, 0.05% EDTA-2Na, and 42.25% water.

[0084] The preparation process of the above-mentioned gel-like makeup remover includes the following steps: Weigh each component according to the above proportions; Water, EDTA-2Na, and erythritol were mixed and stirred at 450 rpm until dissolved, then heated to 82°C to obtain phase A. After mixing and dispersing gellan gum and glycerin, the mixture was added to phase A and stirred at a stirring speed of 450 rpm to obtain phase B. NaCl and butanediol were added to phase B, and the mixture was stirred at a stirring speed of 450 rpm and cooled to 62 °C to obtain phase C. Rhamnolipid, 1,2-hexanediol, and p-hydroxyacetophenone were added to phase C, stirred at 450 rpm, and cooled to 52°C to obtain phase D. Sea salt was added to phase D at 4°C and 600 rpm until a gel-like consistency was formed. Stirring was then stopped, and the mixture was allowed to stand to obtain the target gel-like makeup remover.

[0085] Example 5 A gel-like makeup remover, comprising, by weight percentage: 25% sea salt, 5% erythritol, 8% glycerin, 5% butylene glycol, 1.2% gellan gum, 3% NaCl, 4% rhamnolipid, 2% disodium lauroyl glutamate, 1%, 0.5% p-hydroxyacetophenone, 0.05% EDTA-2Na, and 42.25% water.

[0086] The preparation process of the above-mentioned gel-like makeup remover includes the following steps: Weigh each component according to the above proportions; Water, EDTA-2Na, and erythritol were mixed and stirred at 450 rpm until dissolved, then heated to 82°C to obtain phase A. After mixing and dispersing gellan gum and glycerin, the mixture was added to phase A and stirred at a stirring speed of 450 rpm to obtain phase B. NaCl and butanediol were added to phase B, and the mixture was stirred at a stirring speed of 450 rpm and cooled to 62 °C to obtain phase C. Rhamnol, disodium lauroyl glutamate, 1,2-hexanediol, and p-hydroxyacetophenone were added to phase C and stirred at 450 rpm. The mixture was then cooled to 52 °C to obtain phase D. Sea salt was added to phase D at 4℃ and 600 rpm until a gel-like consistency was formed. Stirring was then stopped, and the mixture was allowed to stand to obtain the desired gel-like makeup remover. (See image for actual product). Figure 1 .

[0087] Example 6 A gel-like makeup remover, comprising, by weight percentage: 25% sea salt, 5% erythritol, 8% glycerin, 5% butylene glycol, 1.2% gellan gum, 3% NaCl, 5% rhamnolipid, 1.5% sodium cocoyl glutamate, 1%, 1,2-hexanediol, 0.5% p-hydroxyacetophenone, 0.05% EDTA-2Na, and 41.75% water.

[0088] The preparation process of the above-mentioned gel-like makeup remover includes the following steps: Weigh each component according to the above proportions; Water, EDTA-2Na, and erythritol were mixed and stirred at 450 rpm until dissolved, then heated to 82°C to obtain phase A. After mixing and dispersing gellan gum and glycerin, the mixture was added to phase A and stirred at a stirring speed of 450 rpm to obtain phase B. NaCl and butanediol were added to phase B, and the mixture was stirred at a stirring speed of 450 rpm and cooled to 62 °C to obtain phase C. Rhamnolipid, sodium cocoyl glutamate, 1,2-hexanediol, and p-hydroxyacetophenone were added to phase C and stirred at 450 rpm. The mixture was then cooled to 52 °C to obtain phase D. Sea salt was added to phase D at 4°C and 600 rpm until a gel-like consistency was formed. Stirring was then stopped, and the mixture was allowed to stand to obtain the target gel-like makeup remover.

[0089] Comparative Example 1 In Comparative Example 1, the difference from Example 1 is that rhamnolipid was replaced with an equal amount of disodium lauroylglutamate, while the other components and preparation process remained unchanged.

[0090] Comparative Example 2 In Comparative Example 2, the difference from Example 3 is that the sea salt concentration was reduced to 20%, and the water content was adjusted accordingly so that the content of the remaining components remained unchanged, and the preparation process remained the same.

[0091] Comparative Example 3 In Comparative Example 3, the difference from Example 3 is that gellan gum was used to replace NaCl in an equal amount, while the other components and preparation process remained unchanged.

[0092] Comparative Example 4 In Comparative Example 4, the difference from Example 4 is that gellan gum was replaced with an equal amount of conventional thickener U21, while the other components and preparation process remained unchanged.

[0093] Comparative Example 5 In Comparative Example 5, the difference from Example 5 is that only butanediol was added to phase B, while NaCl and sea salt were added to phase D at the same time, and the other components and preparation process remained unchanged.

[0094] Performance Evaluation I. Stability Evaluation Take 50ml of the gel-like makeup remover prepared in Examples 1 to 6 and Comparative Examples 1 to 5 respectively, and let them stand at high temperature (45℃), low temperature (4℃), hot and cold cycling (-15℃, 0℃, 25℃ and 40℃ for 6 hours at each temperature, and then cycle sequentially) and at room temperature (25℃) for 7 days, 14 days, 1 month and 3 months respectively. Observe whether each sample precipitates and separates into layers. The results are shown in Table 1. Note: If there is no stratification and no sedimentation, the result is recorded as "1"; if there is stratification and no sedimentation, the result is recorded as "2"; if there is no stratification and sedimentation, the result is recorded as "3"; if there is stratification and sedimentation, the result is recorded as "4".

[0095] Table 1 Stability Test Results As shown in Table 1, the gel-like makeup remover prepared in Examples 1 to 6 of this invention did not exhibit stratification or precipitation after being left to stand at high temperature (45°C), low temperature (4°C), hot and cold cycles, and room temperature (25°C) for 7 days, 14 days, 1 month, and 3 months, respectively, demonstrating good stability.

[0096] Comparative Example 1 replaced rhamnolipid with an equal amount of disodium lauroyl glutamate. Since disodium lauroyl glutamate cannot form micelle structures in high-salt systems, the stability of the system decreased significantly after being compressed by the hypertonic environment. This also shows that only rhamnolipid as a surfactant can improve the stability of high-salt systems.

[0097] Comparative Example 2 reduced the sea salt concentration to 20%. At this point, the sea salt concentration was reduced, and a hypertonic environment could not be formed, which prevented the rhamnose glycolipid micelles from being compressed into a single gel-like structure, thus affecting long-term stability.

[0098] In Comparative Example 3, when gellan gum was replaced with an equal amount of NaCl, the overall system exhibited stratification and precipitation within a short period. This is likely because gellan gum requires cations for activation to form a three-dimensional network gel structure. Removing NaCl prevented the provision of cations, thus hindering the stabilization of the gellan gum's three-dimensional network structure. Consequently, the nano-sized micelles formed by rhamnolipids compressed by the high concentration of sea salt struggled to embed smoothly into the three-dimensional network structure, leading to stratification and sedimentation.

[0099] In Comparative Example 4, when gellan gum was replaced with an equal amount of the conventional thickener U21, the overall system exhibited stratification and precipitation within a short period. This is likely because U21 cannot form a stable three-dimensional network structure with NaCl. At this point, the nano-sized micelles formed by rhamnolipids compressed by the high concentration of sea salt could not be embedded, leading to stratification and sedimentation of the system.

[0100] In Comparative Example 5, only butanediol was added to phase B, while NaCl and sea salt were added to phase D simultaneously. The stability decreased, which may be because the gellan gum network was not optimized with NaCl beforehand, resulting in a decrease in the salt resistance of the gellan gum network. Therefore, after adding a high concentration of sea salt, the gel system collapsed and the stability decreased.

[0101] II. Stimulating Evaluation The gel-like makeup removers provided in Examples 1 to 6 and Comparative Examples 1 to 5 were tested. Twenty-two volunteers, aged between 20 and 40 years old, including 11 males and 11 females, were selected and randomly divided into 11 groups, with one male and one female in each group.

[0102] Test method: A qualified patch tester was selected, and a closed patch test method was used. 0.05 ml of the gel-like makeup remover provided in Examples 1 to 6 and Comparative Examples 1 to 5 was applied to the inside of the patch tester, and then applied to the flexor side of the subject's forearm with special adhesive tape. The test substance was removed after 24 hours. 30 minutes after removing the patch tester, the skin reaction was observed after the indentation disappeared. The results were recorded according to the skin reaction grading standard in the "Cosmetic Hygiene Standard" (2007 edition), and the score level of each group was calculated. The higher the score level (i.e., the larger the score number) of each group, the higher the final score level. The greater the degree of reaction, the greater the final degree of reaction.

[0103] Results evaluation: Record the reaction results according to Table 2 (grading criteria for adverse skin reactions), and the results are shown in Table 3.

[0104] Table 2. Grading Standards for Adverse Skin Reactions Table 3. Results of Stimulation Evaluation As shown in Table 3, the gel-like makeup removers prepared in Examples 1 to 6 of this invention are non-irritating or only slightly irritating to the skin, and are suitable for people with sensitive skin.

[0105] Comparative Example 1 replaced rhamnolipid with an equal amount of disodium lauroyl glutamate. Since disodium lauroyl glutamate is irritating to the skin, it could not provide barrier repair function when combined with high concentration of sea salt. This also shows that only rhamnolipid as a surfactant can reduce the potential irritation of the overall formula in a high-salt system.

[0106] In Comparative Example 2, the sea salt concentration was reduced to 20%. At this point, the sea salt concentration was reduced, and a hypertonic environment could not be formed. As a result, the rhamnolipin micelles could not be compressed into a single gel-like structure, and could not form a synergistic barrier repair effect with rhamnolipin. Only by adding soothing ingredients could the irritation be reduced.

[0107] Comparative Example 3 replaced NaCl with an equal amount of gellan gum. After removing NaCl, no cations were available, causing the three-dimensional network structure of the gellan gum to become unstable. In this case, the gellan gum particles would rub against the skin, causing erythema and papules.

[0108] In Comparative Example 4, gellan gum was replaced with an equal amount of the conventional thickener U21. U21 failed to form a stable three-dimensional network structure with NaCl. In this case, the nano-sized micelles formed by rhamnolipids compressed by high concentrations of sea salt could not be embedded, resulting in poor system stability and strong irritation.

[0109] In Comparative Example 5, only butylene glycol was added to phase B, while NaCl and sea salt were added to phase D simultaneously. The gellan gum network was not optimized with NaCl beforehand, which reduced the salt tolerance of the gellan gum network. Therefore, after adding a high concentration of sea salt, the gel system collapsed, and the free salt ions and surfactants directly irritated the skin, resulting in a strong positive reaction.

[0110] III. Evaluation of Cleaning Effectiveness The gel-like makeup removers provided in Examples 1-6 and Comparative Examples 1-5 were tested to evaluate their makeup removal capabilities by assessing their ability to remove five commercially available makeup products (sunscreen, lipstick, mascara, eyeliner, and foundation) from Perfect Diary counters. The specific results are as follows: One hundred and ten female volunteers, aged 20 to 30, were selected. All volunteers underwent facial makeup application, including applying foundation to one side of the face, sunscreen to the other side, lipstick to the lips, mascara to the eyelashes, and eyeliner. They waited at room temperature for four hours. The 110 volunteers were then randomly divided into 11 groups of ten each, designated as Example 1 to Example 6 and Comparative Example 1 to Comparative Example 5. Each group received 3 ml of the gel-like makeup remover provided in Examples 1 to 6 and Comparative Example 1 to Comparative Example 5. The remover was applied to both sides of the volunteer's face without water, and the face, lips, and eyes were rubbed with constant pressure for 15 seconds, followed by rinsing with water for 1 minute.

[0111] The results of the study on 110 people were recorded as follows: whether their makeup was completely removed after rinsing, whether there was any residue of makeup and cleansing balm, and whether they felt oily. The results are shown in Table 4.

[0112] Table 4 As shown in Table 4, the gel-like makeup removers prepared in Examples 1 to 6 of this invention have good cleaning effects.

[0113] Comparative Example 1 replaced rhamnolipid with an equal amount of disodium lauroyl glutamate. Since disodium lauroyl glutamate cannot form micelle structures in high-salt systems, it cannot penetrate submicron cracks instantly after being compressed by the hypertonic environment, and thus cannot emulsify quickly, resulting in reduced cleaning effect.

[0114] Comparative Example 2 reduced the sea salt concentration to 20%. At this point, the reduced sea salt concentration prevented the formation of a hypertonic environment, causing the rhamnolipin micelles to be unable to be compressed into a single gel-like structure and unable to penetrate submicron fissures instantly, thus hindering rapid emulsification and reducing the cleaning effect.

[0115] In Comparative Example 3, NaCl was replaced with an equal amount of gellan gum. After removing NaCl, no cations could be provided, which made it impossible to stabilize the three-dimensional network structure of gellan gum. The overall system experienced stratification and precipitation in a short period of time. After stratification, the cleaning components were unevenly distributed, the emulsification effect was reduced, and thus the cleaning effect was greatly reduced.

[0116] In Comparative Example 4, gellan gum was replaced with an equal amount of the conventional thickener U21. U21 failed to form a stable three-dimensional network structure with NaCl. In this case, the nano-sized micelles formed by rhamnolipids compressed by high-concentration sea salt could not be embedded, resulting in reduced emulsification and poor cleaning performance.

[0117] In Comparative Example 5, only butanediol was added to phase B, while NaCl and sea salt were added to phase D simultaneously. NaCl was not used to optimize the gellan gum network beforehand, which resulted in a decrease in the salt resistance of the gellan gum network. The cleaning components micelles and sea salt were released during the stratification process, making it impossible to effectively clean the network.

[0118] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A gel-like makeup remover, characterized in that, The makeup remover comprises, by weight percentage: 25%~30% abrasive, 16%~20% moisturizer, 4%~4.5% thickener, 3%~7% anionic surfactant, 1.2%~1.8% preservative, 0.04%~0.06% chelating agent, and an appropriate amount of water; The abrasive includes sea salt; the thickener includes gellan gum and NaCl in a mass ratio of (1.15~1.25):(2.85~3.25); and the anionic surfactant includes rhamnolipid.

2. The gel-like makeup remover according to claim 1, characterized in that, The moisturizer comprises erythritol, glycerin and butylene glycol in a mass ratio of (4-5):(7-9):(5-6).

3. The gel-like makeup remover according to claim 1, characterized in that, The anionic surfactant also includes at least one of disodium lauroyl glutamate and sodium cocoyl glutamate.

4. The gel-like makeup remover according to claim 1, characterized in that, The preservative comprises 1,2-hexanediol and p-hydroxyacetophenone in a mass ratio of (0.8~1.2):(0.4~0.6).

5. The gel-like makeup remover according to any one of claims 1 to 4, characterized in that, The chelating agent includes at least one of EDTA-2Na and EDTA-4Na.

6. A method for preparing a gel-like makeup remover, used to prepare the gel-like makeup remover according to any one of claims 1 to 5, characterized in that, Includes the following steps: Weigh each component according to the composition and proportion of the gel-like makeup remover as described in any one of claims 1 to 5; The water, the chelating agent, and the humectant in the first part are mixed, stirred and dissolved, and then heated to 80°C~85°C to obtain phase A; Mix a portion of the thickener and the second portion of the humectant, disperse them, add them to phase A, and stir to obtain phase B; Add the remaining thickener and the third part of the humectant to phase B, stir, and cool to 60°C~65°C to obtain phase C; The anionic surfactant and the preservative are added to phase C, stirred, and cooled to 50°C~55°C to obtain phase D; At 2℃-5℃, the abrasive is added to the D phase while stirring until a gel-like consistency is formed. Stirring is then stopped, and the mixture is allowed to stand to obtain the target gel-like makeup remover.

7. The method for preparing the gel-like makeup remover according to claim 6, characterized in that, The moisturizer described in the first part is erythritol; and / or, The stirring speed for mixing and dissolving the water, the chelating agent, and the humectant in the first part is 400 rpm to 500 rpm.

8. The method for preparing the gel-like makeup remover according to claim 6, characterized in that, The thickener described in this part is gellan gum; and / or, The moisturizer described in the second part is glycerin; and / or, The thickener and the humectant described in the second part are mixed and dispersed, and then added to phase A at a stirring speed of 400 rpm to 500 rpm; and / or, The remaining thickeners include NaCl; and / or, The moisturizers described in Part Three include butylene glycol; and / or, After adding the remaining thickener and the third part of the humectant to phase B, the stirring speed is 400 rpm to 500 rpm.

9. The method for preparing the gel-like makeup remover according to claim 6, characterized in that, The stirring speed for adding the anionic surfactant and the preservative to the C phase is 400 rpm to 500 rpm.

10. The method for preparing the gel-like makeup remover according to any one of claims 6 to 9, characterized in that, The stirring speed for adding the friction agent to the D phase under stirring conditions is 500 rpm to 700 rpm.

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