Multi-effect color-changing sunscreen makeup base and preparation method thereof

Abstract

The invention particularly relates to a multi-effect color-changing sunscreen makeup base and a preparation method thereof. Raw materials for preparing the sun-screening cream comprise a phase A and a phase H, wherein the phase A comprises a chemical sun-screening agent and an emollient; the phase B contains an emollient; the phase C contains an emulsifier, a film-forming agent and a coloring agent; the phase D contains an oil phase thickener and a functional raw material; the phase E contains a chemical sun-screening agent, a chelating agent, a humectant and the like; the phase F contains a neutralizer; the phase G contains a skin protective agent; and the phase H contains color-changing powder. The sum of the mass percentages of all the raw materials is 100%. The preparation method comprises the following steps: S1, pretreating and homogenizing the phase B; s2, dissolving and cooling the phase A, adding the phase B, the phase C and the phase D, and homogenizing; s3, dissolving the phase E, adding the phase F, adjusting the pH value, homogenizing, and mixing into an emulsifying pot; and S4, adding the G phase and the H phase into the emulsifying pot, and stirring and homogenizing. The sunscreen cream integrates the functions of skin care, isolation, sunscreen and the like, has a color changing effect, meets the multifunctional requirements, improves the sunscreen performance and the makeup effect through a fine formula and process, improves the skin state, provides comprehensive protection and keeps the makeup fine and smooth, and the base makeup is smeared well.

Description

Technical Field

[0001] This application relates to the technical field of cosmetics, and further belongs to the field of color cosmetics. Specifically, it is a multi-functional color-changing sunscreen primer and its preparation method. Background Art

[0002] In the current cosmetics market, primer, sunscreen, and skin care cream are usually supplied to consumers as independent products. The traditional usage process is quite cumbersome. Consumers need to follow a specific order: first apply skin care products with functions such as moisturizing and repair (such as essence, lotion), then apply sunscreen to protect against ultraviolet damage, and finally use color cosmetics such as primer or foundation to adjust skin tone and cover blemishes. This multi-step process not only takes a long time but may also affect the makeup effect due to the interaction between products. Specifically, multiple products in the traditional process need to be applied one by one, and each product needs time to absorb and dry after application, which undoubtedly increases the time cost of daily skin care and makeup. In addition, if the sunscreen is not fully absorbed before applying primer or foundation, it may lead to uneven sunscreen effect or even weaken the protection. The compatibility problem between products cannot be ignored either. Some sunscreen ingredients may react with primer or foundation ingredients, causing caking, pilling, or uneven makeup. The texture of the sunscreen may also affect the adhesion of subsequent color cosmetics, making the makeup difficult to last.

[0003] From a functional perspective, traditional sunscreens focus on ultraviolet protection, while primers and foundations pay more attention to skin tone modification and concealer. However, the whitening phenomenon that may occur after applying sunscreen will affect the skin tone uniformity, and the sun protection index of primers and foundations is usually low, making it difficult to provide sufficient protection, which forces consumers to make a choice between sun protection and modification effects.

[0004] Furthermore, conventional primers and sunscreens are difficult to meet consumers' needs for skin tone modification. There is no significant color difference between the application and appearance. At the same time, the whitening phenomenon of sunscreen, especially high-SPF products, not only affects the appearance but may also lead to uneven skin tone. High-SPF sunscreens often have a thick and greasy texture and are not easy to apply evenly; while lightweight products have a better user experience but a lower sun protection index and insufficient protection. Summary of the Invention

[0005] Therefore, to solve the above technical problems, this application hereby provides a multi-functional color-changing sunscreen primer and its preparation method, aiming to combine the functions of skin care, primer, and sunscreen. It not only has the special feature that the application color is different from the appearance color, but also significantly shortens the makeup time, making the product more convenient to use. At the same time, it solves the adverse effects such as whitening, skin damage, and caking and pilling of subsequent base makeup after applying high-SPF sunscreen products.

[0006] In a first aspect, a multi-functional color-changing sunscreen primer provided by the present application adopts the following technical solution: A multi-functional color-changing sunscreen primer, the preparation raw materials of which, calculated by mass percentage, include: Phase A: 1-25% of chemical sunscreen agent; 5-15% of emollient; Phase B: 10-25% of emollient; Phase C: 1-5% of emulsifier; 0.5-8% of film-forming agent; 2-15% of colorant; Phase D: 0.1-2% of oil-phase thickener; 1-10% of functional raw material; Phase E: 1-5% of chemical sunscreen agent; 0-0.1% of chelating agent; 2-10% of humectant; 0-0.1% of skin protectant; 0.1-1% of preservative; 0-5% of emulsion stabilizer; the balance is deionized water; Phase F: 0.01-0.5% of neutralizer; Phase G: 0.01-5% of skin protectant; Phase H: 0.1-10% of color-changing powder; Among them, the sum of the mass percentages of all the preparation raw materials in the above Phase A - Phase H is 100%.

[0007] Further, the chemical sunscreen agent is selected from at least one of bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl methoxycinnamate, ethylhexyl triazone, 4-methylbenzylidene camphor, phenylbenzimidazole sulfonic acid, octocrylene, diethylamino hydroxybenzoyl hexyl benzoate, ethyl acetate salicylate, methylene bis-benzotriazolyl tetramethylbutylphenol, polysiloxane-15, and homosalate.

[0008] Further, the emollient is selected from at least one of cetyl dimethicone, cyclopentasiloxane, C12-15 alkyl benzoate, butanediol dicaprylate / dicaprate, isododecane, octyl polymethylsiloxane, methyl polytrimethylsiloxane, polydimethylsiloxane, diphenylsilanoxy phenyl polytrimethylsiloxane, diisopropyl sebacate, cetyl ethylhexanoate, and tridecyl trimellitate.

[0009] Further, the emulsifier is selected from at least one of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, sorbitan sesquioleate, lauryl PEG-9 polydimethylsiloxyethyl polydimethylsiloxane, PEG / PPG-18 / 18 polydimethylsiloxane, and PEG-10 polydimethylsiloxane.

[0010] Further, the film-forming agent is selected from at least one of acrylic (ester) / polydimethylsiloxane copolymer, trimethylsiloxysilicate, acrylic (ester) / polymethyltrimethoxysilane methacrylate copolymer, and polymethylsilsesquioxane; the functional raw material is selected from at least one of silicone elastomer, silica, and silicone powder.

[0011] Further, the humectant is selected from at least one of glycerol, butanediol, propylene glycol, pentylene glycol, and hexylene glycol; the emulsification stabilizer is selected from at least one of sodium chloride and magnesium sulfate; the preservative is selected from at least one of phenoxyethanol, caprylyl glycol, and ethylhexylglycerin.

[0012] Further, the oil-phase thickener is selected from at least one of fumed silica and lithium magnesium sodium silicate; the chelating agent is disodium EDTA.

[0013] Further, the neutralizing agent is selected from at least one of aminomethylpropanol, sodium hydroxide, arginine, and triethanolamine; the skin protectant is selected from at least one of dipotassium glycyrrhizate, ginger root extract, sodium hyaluronate, centella asiatica extract, bisabolol, aloe extract, and tocopherol.

[0014] Preferably, for the multi-functional color-changing sunscreen primer, the preparation raw materials are as follows by mass percentage: Phase A: ethylhexyl salicylate 1-4%; ethylhexyl triazone 1-5%; homosalate 1-5%; bis-ethylhexyloxyphenol methoxyphenyl triazine 1-5%; diethylamino hydroxybenzoyl hexyl benzoate 1-5%; C12-15 alkyl benzoate 5-15%; Phase B: cyclopentasiloxane 8-20%; octyl polymethylsiloxane 3%; Phase C: lauryl PEG-9 polydimethylsiloxyethyl polydimethylsiloxane 1-3%; cetyl PEG / PPG-10 / 1 polydimethylsiloxane 1-3%; acrylic (ester) / polydimethylsiloxane copolymer 1-5%; titanium dioxide 6-15%; Phase D: lithium magnesium sodium silicate 0.9%; silica 1-5%; Phase E: phenylbenzimidazole sulfonic acid 1-5%; disodium EDTA 0.1%; butanediol 3%; glycerol 4%; ethylhexylglycerin 0.5%; 1,2-hexanediol 0.5%; dipotassium glycyrrhizate 0.1%; caprylyl glycol 0.15%; sodium chloride 0.5%; the balance is deionized water; Phase F: aminomethylpropanol 0.02%; Phase G: aloe extract 0.01-2%; bisabolol 0.01-1%; ginger root extract 0.01-1%; tocopherol 0.01-1%; Phase H: color-changing powder 0.1-10%; Among them, the sum of the mass percentages of all the preparation raw materials in the above-mentioned Phase A - Phase H is 100%.

[0015] By adopting the above technical solution, the multi - effect color - changing sunscreen primer realizes multiple technical effects such as versatility, special color - changing effect, improved user experience, and solving common problems. It significantly shortens the makeup application time, making it more convenient to use, and has high practical value and market prospects. It effectively combines the functions of skin care, isolation, and sunscreen, meeting the needs of modern consumers for the versatility of cosmetics. At the same time, by adding color - changing powder, the product has a special effect with a large difference between the appearance and the applied color, increasing the fun and personalization of use. Moreover, the product formula design is optimized, so that both the sunscreen performance, makeup effect, and skin repair performance reach a high level. The makeup application is fresh and not greasy, the makeup is delicate, and it has strong smoothness and fineness for the subsequent external base makeup.

[0016] In the second aspect, a preparation method of a multi - effect color - changing sunscreen primer provided by this application adopts the following technical solution: A preparation method of a multi - effect color - changing sunscreen primer, comprising the following steps: S1. Pretreatment: Mix the Phase B and homogenize it at a high speed of 3000 - 10000 rpm for 10 min until there are no obvious agglomerated particles, then soak it for 1 - 2 h and homogenize it again under the same conditions. Apply the homogenized slurry on a black - and - white card. If there are no white spots, the pretreated Phase B is obtained. S2. Place the Phase A in an emulsifying pot, heat it to 80 - 85 °C, stir it slowly until it is completely dissolved, and then cool it to room temperature. Subsequently, add the pretreated Phase B in S1 to the emulsifying pot and homogenize it at 3000 - 10000 rpm for 5 - 10 min until it is completely dispersed. Then continue to add the Phase C to the emulsifying pot and homogenize it at 3000 - 10000 rpm for 3 - 10 min to fully activate and expand the Phase C. Then continue to add the Phase D and homogenize it at 3000 - 5000 rpm for 3 min until it is completely dispersed without particles. S3. Add the Phase E to the water - phase pot and stir it at a rate of 300 - 1000 rpm until it is dissolved into a transparent solution. Then slowly add the Phase F to the water - phase pot while stirring until the solution is transparent and the pH of the solution is between 7.2 - 7.5. Start stirring at 20 - 50 rpm, then homogenize it at 2000 - 2500 rpm. Subsequently, slowly pour the solution in the water - phase pot into the emulsifying pot while increasing the stirring rate to 50 - 100 rpm and increasing the homogenization speed to 3000 - 10000 rpm for 10 min. S4. Continuously add the G-phase raw materials into the emulsifying pot obtained in S3 after mixing, with the stirring and homogenizing rates being 50 - 100 rpm and 3000 - 10000 rpm respectively, and continue for 3 - 5 min; finally, slowly add the H-phase raw materials into the emulsifying pot while stirring, and control the stirring speed at 100 - 300 rpm until it is evenly stirred without particles, thus obtaining the product.

[0017] By adopting the above technical solution, this method ensures the uniform dispersion and mixing of the raw materials, forms a stable emulsifying system, stabilizes the pH value of the product at the same time, integrates multiple skin care, isolation and sunscreen functions, and finally improves the uniformity, stability and multifunctionality of the product, providing consumers with a high-quality, delicate and stable sunscreen and isolation cream product.

[0018] In summary, the present application has the following beneficial effects: 1. The multi-effect color-changing sunscreen and isolation cream provided by the present application successfully integrates multiple functions such as skin care, isolation and sunscreen into one. It not only meets the needs of modern consumers for the multifunctionality of cosmetics, but also significantly improves the sunscreen performance, makeup effect of the product and improves the skin condition itself through fine formulation design and preparation process, enabling the product to provide comprehensive protection during use while maintaining the delicacy of the makeup and the smoothness of the subsequent base makeup. 2. By adding color-changing powder, the multi-effect color-changing sunscreen and isolation cream provided by the present application can present a special effect different from the appearance color after application, increasing the fun and personalization of use. This color-changing characteristic not only enhances the attractiveness of the product, but also brings a novel use experience to consumers. 3. The preparation method provided by the present application adopts fine dispersion and homogenization technologies, ensuring the uniform dispersion and mixing of the raw materials, forming a stable emulsifying system. At the same time, by strictly controlling various parameters in the preparation process, such as temperature, stirring rate, homogenization speed, etc., it effectively improves the uniformity, stability and multifunctionality of the product. These optimization measures provide consumers with a high-quality, delicate and stable sunscreen and isolation cream product, further enhancing the market competitiveness of the product.

[0019] Reference numerals Figure 1 It is a color sample comparison diagram of the sample prepared in Example 1 of the present application; Figure 2 It is a makeup effect comparison diagram of the sample prepared in Example 1 of the present application; Figure 3 It is the SPF machine-side test results of the samples prepared in Example 1 and Comparative Example 1 of the present application. Detailed implementation manners

[0020] The following further elaborates the present application with reference to examples. Unless otherwise specified, the raw materials used in the present application are all common commercially available materials.

[0021] Example 1 A multi-functional color-changing sunscreen primer, the raw materials for its preparation are composed of the following components by mass percentage: Phase A: Ethylhexyl salicylate 3%; Ethylhexyl triazone 5%; Homosalate 4%; Bis-ethylhexyloxyphenol methoxyphenyl triazine 4%; Diethylamino hydroxybenzoyl hexyl benzoate 5%; C12-15 alkyl benzoate 12%; Phase B: Cyclopentasiloxane 15%; Octyl polymethylsiloxane 3%; Phase C: Laureth-9 polydimethylsiloxyethyl dimethicone 1%; Cetyl PEG / PPG-10 / 1 dimethicone 2%; Acrylate / polydimethylsiloxane copolymer 5%; Titanium dioxide 13%; Phase D: Dimethyldistearylammonium lithium montmorillonite 0.9%; Silica 2%; Phase E: Phenylbenzimidazole sulfonic acid 4%; Disodium EDTA 0.1%; Butylene glycol 3%; Glycerin 4%; Ethylhexylglycerin 0.5%; 1,2-Hexanediol 0.5%; Dipotassium glycyrrhizate 0.1%; Caprylyl glycol 0.15%; Sodium chloride 0.5%; The balance is deionized water; Phase F: Aminomethylpropanol 0.02%; Phase G: Aloe vera extract 0.15%; Bisabolol 0.05%; Ginger root extract 0.20%; Tocopherol 0.55%; Phase H: Color-changing powder 2.5%; Wherein the colorant is a powder treated with triethoxysilane octane, purchased from Shanghai Koufeng Biotechnology Co., Ltd., including titanium dioxide, iron oxide red, iron oxide yellow, iron oxide black, ultramarine blue, manganese violet, chromium green, and in Example 1 of this application, it is titanium dioxide; the color-changing powder is a powder treated by fluidized bed technology, which can achieve distinct color differences in appearance and applied color, purchased from Hualiang Chemical Industry, and contains titanium dioxide, iron oxide red, iron oxide yellow, iron oxide black, ultramarine blue, manganese violet, chromium green, hydrogenated glyceryl cocoate, ethyl cellulose, polyvinyl alcohol, etc.; The above-mentioned multi-functional color-changing sunscreen primer is prepared by the following preparation method: S1. Pretreatment: Mix Phase B and homogenize it at a high speed of 7000 rpm for 10 min until there are no obvious agglomerated particles, then soak it for 1-2 h and homogenize it again under the same conditions. Apply the homogenized slurry on a black and white card. If there are no white spots, the pretreated Phase B is obtained; S2. Heat phase A in an emulsifying pan to 85°C, stir slowly until completely dissolved, cool to room temperature, then add the pretreated phase B from S1 to the emulsifying pan and homogenize at 8000 rpm for 7 min until completely dispersed; then continue to add phase C to the emulsifying pan and homogenize at 6500 rpm for 5 min to fully activate and expand phase C, and then continue to add phase D and homogenize at 4000 rpm for 3 min until completely dispersed without particles. S3. Add phase E to the aqueous phase pan and stir to dissolve it into a transparent solution at a rate of 550 rpm, then slowly add phase F to the aqueous phase pan while stirring until the solution is transparent and the pH of the solution is between 7.2 and 7.5; start stirring at 30 rpm, then homogenize at 2500 rpm, and then slowly pour the solution in the aqueous phase pan into the emulsifying pan while increasing the stirring rate to 60 rpm and increasing the homogenization speed to 4500 rpm for 10 min. S4. Continue to add the raw material of phase G to the emulsifying pan obtained after mixing in S3, and the stirring and homogenization rates are 50 rpm and 7000 rpm respectively for 4 min; finally, continue to slowly add the raw material of phase H to the emulsifying pan while stirring, and control the stirring speed at 100 rpm until it is stirred evenly without particles, and then it is obtained.

[0022] Comparative Example 1 A multi-effect color-changing sunscreen primer, its preparation method is basically the same as that of Example 1, and the only difference is that the color-changing powder is not included in phase H, that is, no color-changing powder is added to the whole preparation raw materials.

[0023] Example 2 A multi-effect color-changing sunscreen primer, its preparation method is basically the same as that of Example 1, and the only difference is that tridecyl trimellitate is used to replace C12-15 benzoate in phase A in equal amount.

[0024] Example 3 A multi-effect color-changing sunscreen primer, its preparation method is basically the same as that of Example 1, and the only difference is that cetyl polydimethylsiloxane is used to replace C12-15 benzoate in phase A in equal amount.

[0025] Example 4 A multi-effect color-changing sunscreen primer, its preparation method is basically the same as that of Example 1, and the only difference is that diisopropyl sebacate is used to replace C12-15 benzoate in phase A in equal amount.

[0026] Comparative Example 2 A multi-effect color-changing sunscreen primer, its preparation method is basically the same as that of Example 1, and the only difference is that the film-forming agent is not included in phase C.

[0027] Comparative Example 3 A multi-effect color-changing sunscreen primer, its preparation method is basically the same as that of Example 1, and the only difference is that the C phase does not contain coloring agents.

[0028] Example 5 A multi-effect color-changing sunscreen primer, its preparation method is basically the same as that of Example 1, and the only difference is that the color-changing powder in the H phase is selected from the color-changing particles of Liankai powder.

[0029] Comparative Example 4 A multi-effect color-changing sunscreen primer, its preparation raw materials are basically the same as those of Example 1, and the only difference is that the step of S1 pretreatment is omitted during the preparation process.

[0030] Performance detection test (1) Appearance evaluation Using the multi-effect color-changing sunscreen primer prepared by the above-mentioned examples or comparative examples as the test sample, use a sampler to apply 10 mg / cm 2 of the sample dots on the color sample comparison card (black and white card), and observe the color samples before and after spreading respectively. The test results are as follows.

[0031] Table 1: Color sample detection results of Examples 1-5 and Comparative Examples 1-3 Group Color sample states before and after smearing and spreading Example 1 Light purple before smearing and spreading, skin color after smearing and spreading, delicate and particle-free Example 2 Light purple before smearing and spreading, skin color after smearing and spreading, slightly greasy Example 3 Light purple before smearing and spreading, skin color after smearing and spreading, greasy and thick Example 4 Light purple before smearing and spreading, skin color after smearing and spreading, slightly thick and contains some particles Example 5 Light purple before smearing and spreading, skin-like color after smearing and spreading, thick Comparative Example 1 Skin-like color before smearing and spreading, skin-like color after smearing and spreading, slightly thick Comparative Example 2 Light purple before smearing and spreading, skin color after smearing and spreading, slightly thick Comparative Example 3 Light purple before smearing and spreading, skin color after smearing and spreading, slightly thick Comparative Example 4 Light purple before smearing and spreading, skin color after smearing and spreading, thick and contains granular (2) Sensory evaluation For the makeup effect test, 5 subjects with different skin properties were selected, specifically: Subject 1, age: 25, gender: female, skin property: combination oily; Subject 2, age: 22, gender: male, skin property: dry skin; Subject 3, age: 31, gender: male, skin property: combination oily; Subject 4, age: 30, gender: female, skin property: combination dry; Subject 5, age: 26, gender: male, skin property: oily skin; Evenly apply the test sample on one side of the cheek of the same subject, and the other side is the blank group. Visually observe the skin condition on both sides of the cheek before and after application; Evenly apply the test sample on one side of the cheek of the same subject, and the other side is the blank group. Then continue to apply the cushion foundation. Visually observe the makeup effect. The test results are as follows, and the results are all taken as the average value.

[0032] Table 2: Makeup effect test detection results of Examples 1-5 and Comparative Examples 1-3 (3) Sunscreen efficacy test The multi-effect color-changing sunscreen primer prepared by the above-mentioned examples or comparative examples was used as a test sample. Using a sampler, 1.5 mg / cm of the sample was dot-applied on a PMMA plate 2 and placed horizontally in a place without direct sunlight at room temperature to dry and equilibrate for 20 min. 12 points were randomly detected, and then the UV-2000S of LABSPHERE Company was used for SPF testing to obtain the corresponding light wavelength curve, and the test results of the sample were calculated. The results are all averages, and the test results are as follows.

[0033] Table 3: Detection results of SPF values (sun protection indices) of Examples 1-5 and Comparative Examples 1-3 Group SPF value Example 1 192.60 Example 2 188.41 Example 3 190.53 Example 4 192.27 Example 5 165.76 Comparative Example 1 130.44 Comparative Example 2 168.52 Comparative Example 3 159.35 Comparative Example 4 162.13 Judging from the detection situations in Tables 1-3 above, for the primer sample prepared in Example 1, all its performances are excellent. Combining Figure 1 it can be seen that there is a strong contrast effect between its appearance and the applied color. The appearance color is light purple, the applied color is skin color, the material body is delicate without particles, and it is easy to apply and make up; In addition, this treatment also has the effect of significantly improving the natural state of the skin. As Figure 2-1 shown, after the subjects applied it, the skin fineness of the tested area was visibly improved. This positive change is mainly due to dipotassium glycyrrhizate, bisabolol and ginger root extract in the formula. As key raw materials with anti-allergic, anti-inflammatory and skin-soothing effects, these ingredients can work together to greatly reduce the damage caused by external stimuli (especially ultraviolet rays) to the skin. At the same time, aloe extract and tocopherol are also incorporated into the formula, and their combined action can effectively relieve the skin oxidation problem caused by sun exposure and exert an excellent sedative and repair effect; And it can be seen from Figure 2-2 that after the subjects applied the primer sample, the smooth and delicate degree of subsequent other external base makeup products can be significantly improved; in addition, its machine-side value SPF also reached 192.60, indicating that this sample has excellent sun protection performance.

[0034] In the comparative tests of Examples 2 to 4, we replaced C12-15 benzoate in the A phase of the primer sample with an equal amount of other emollient types. The test results showed that although the SPF value (sun protection index) did not change significantly, other performances of the product declined to varying degrees. Specifically, the color sample showed a greasy and heavy feeling, and there were a small number of particles. In addition, when using this primer for makeup, the makeup effect was also greasy and heavy. When using an external base makeup product (such as a cushion) after applying the primer of the present application, even caking occurred; These test results indicate that C12-15 benzoate, as an important ingredient in Phase A, plays a crucial role in improving the physical properties of the primer. This may be because C12-15 benzoate is not only economical and practical but also has excellent dissolution and dispersion capabilities for chemical sunscreen agents in Phase A. This ability helps reduce the greasiness caused by excess oil in the product, thereby enhancing the overall user experience and makeup effect of the product.

[0035] In Example 5, the color-changing powder in Phase H was replaced with color-changing particles from Liankai Powder (the appearance color is light purple and the applied color is skin-like) of Huailiang Chemical Industry processed by fluidized bed technology in Example 1. We found that the application of the material was slightly thick, and caking occurred during overlapping application (using a cushion after applying the primer of this application). At the same time, the SPF value decreased significantly compared with Example 1.

[0036] In Comparative Examples 1-3, certain components in the raw materials for preparing the primer samples were omitted. From the test results, it can be found that in Comparative Example 1, since the color-changing powder was not added, the appearance color and applied color of the sample were both skin-like, and the application feeling and makeup effect were relatively thick. At the same time, Figure 3 judging from the SPF value, it decreased significantly to 130.44, which indicates that the color-changing powder can effectively improve the sun protection ability of this primer and has good compatibility with the components of other phases, improving the fineness; During the preparation of the primer sample in Comparative Example 2, the film-forming agent in Phase C was omitted. The test results showed that the applied color sample of this sample appeared relatively thick, and caking occurred during overlapping application with subsequent other base makeup products. The occurrence of this problem may be closely related to the role of the film-forming agent in the formula. In the formula of this application, the film-forming agent and the water-in-oil emulsifier act synergistically to wet, homogenize or grind the color-changing powder and colorant. This process can not only improve the adherence and firmness of the powder but also significantly enhance the evenness of powder application. Therefore, the presence of the film-forming agent is of great significance for reducing the caking phenomenon during overlapping application of the product with subsequent base makeup. After omitting the film-forming agent, these beneficial effects weakened, resulting in the occurrence of the caking phenomenon; In the preparation process of the primer sample of Comparative Example 3, we omitted the colorant in Phase C. The test results showed that the application feel and makeup effect of this sample were slightly thicker compared to the complete formula. More importantly, its SPF value decreased significantly, with the specific value dropping to 159.35. This significant change may be closely related to the colorant we used - titanium dioxide. In the formula of this application, titanium dioxide not only acts as a colorant to give the product a specific color, but also has the function of a physical sunscreen, which can effectively reflect or scatter ultraviolet rays, thereby enhancing the sunscreen performance of the product. Therefore, after omitting the colorant (i.e., titanium dioxide), the sunscreen ability of the product is directly affected, resulting in a decrease in the SPF value; In Comparative Example 4, the pretreatment process of the primer sample preparation step was omitted. The test results showed that the application feel of this sample was slightly thicker and accompanied by particles. At the same time, pilling occurred during the subsequent application of base makeup, and the SPF value decreased significantly, with the specific value dropping to 162.13; The above results indicate that the pretreatment step is indispensable in the preparation process of the primer sample. This step can effectively break the aggregated particles in Phase B, ensuring the uniform distribution of various components. Through the primary homogenization treatment and the secondary homogenization after soaking, the stability of Phase B can be further consolidated, effectively preventing problems such as precipitation and stratification that may be caused by uneven component distribution. In addition, by applying the treated Phase B on a black and white card for inspection and confirming the absence of white spots, it can be ensured that Phase B has reached the necessary uniformity and dispersion standards before being mixed with other phases, which is crucial for the control of the final product quality.

[0037] The above are all modifications that those skilled in the art can make according to their needs after reading this specification without making creative contributions or obvious technical inspiration schemes, but as long as they are within the scope of the claims of this application, they should be protected by the patent law.

Claims

1. A multi-effect color-changing sunscreen isolation cream, characterized in that: The raw materials for preparation include, by weight percentage: Phase A: Chemical sunscreen 1-25%; Emollient 5-15%; Phase B: Emollient 10-25%; Phase C: emulsifier 1-5%; film former 0.5-8%; colorant 2-15%; Phase D: oil phase thickener 0.1-2%; functional raw materials 1-10%; Phase E: chemical sunscreen 1-5%; chelating agent 0-0.1%; moisturizer 2-10%; skin protectant 0-0.1%; preservative 0.1-1%; emulsion stabilizer 0-5%; the balance is deionized water; Phase F: neutralizer 0.01-0.5%; Phase G: skin protectant 0.01-5%; Phase H: color-changing powder 0.1-10%; The total mass percentage of all the raw materials in the above-mentioned phase A-phase H is 100%.

2. The multi-effect color-changing sunscreen isolation cream according to claim 1, characterized in that: The chemical sunscreen is selected from at least one of bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl methoxycinnamate, ethylhexyl triazone, 4-methylbenzylidene camphor, phenylbenzimidazole sulfonic acid, octocrylene, diethylaminohydroxybenzoyl hexyl benzoate, ethyl salicylate, methylene bis-benzotriazolyl tetramethylbutylphenol, polysilicone-15, and homosalate.

3. The multi-effect color-changing sunscreen isolation cream according to claim 1, characterized in that: The emollient is selected from at least one of cetyl dimethicone, cyclopentasiloxane, C12-15 alcohol benzoate, butylene glycol dicaprylate / dicaprate, isododecane, octyl polymethicone, methyl trimethicone, polydimethylsiloxane, diphenylsiloxy phenyl trimethicone, diisopropyl sebacate, cetyl ethylhexanoate, and tridecyl trimellitate.

4. The multi-effect color-changing sunscreen isolation cream according to claim 1, characterized in that: The emulsifier is selected from at least one of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, sorbitan sesquioleate, lauryl PEG-9 polydimethylsiloxyethyl polydimethylsiloxane, PEG / PPG-18 / 18 polydimethylsiloxane, and PEG-10 polydimethylsiloxane.

5. The multi-effect color-changing sunscreen isolation cream according to claim 1, characterized in that: The film-forming agent is selected from at least one of acrylic acid (ester) / polydimethylsiloxane copolymer, trimethylsiloxysilicate, acrylic acid (ester) / polytrimethylsiloxane methacrylic acid copolymer, and polymethylsilsesquioxane; the functional raw material is selected from at least one of silicone elastomer, silica, and organic silicon powder.

6. The multi-effect color-changing sunscreen isolation cream according to claim 1, characterized in that: The moisturizer is selected from at least one of glycerin, butylene glycol, propylene glycol, pentylene glycol, and hexylene glycol; the emulsifier stabilizer is selected from at least one of sodium chloride and magnesium sulfate; and the preservative is selected from at least one of phenoxyethanol, caprylyl glycol, and ethylhexylglycerin.

7. The multi-effect color-changing sunscreen isolation cream according to claim 1, characterized in that: The oil phase thickener is selected from at least one of fumed silica and disteardimethylammonium hectorite; and the chelating agent is disodium EDTA.

8. The multi-effect color-changing sunscreen isolation cream according to claim 1, characterized in that: The neutralizer is selected from at least one of aminomethyl propanol, sodium hydroxide, arginine, and triethanolamine; the skin protectant is selected from at least one of dipotassium glycyrrhizinate, ginger root extract, sodium hyaluronate, Centella asiatica extract, bisabolol, aloe extract, and tocopherol.

9. The multi-effect color-changing sunscreen isolation cream according to claim 1, characterized in that: The raw materials for preparation include, by weight percentage: Phase A: 1-4% ethylhexyl salicylate; 1-5% ethylhexyl triazone; 1-5% homosalate; 1-5% bis-ethylhexyloxyphenol methoxyphenyl triazine; 1-5% diethylamino hydroxybenzoyl hexyl benzoate; 5-15% C12-15 alcohol benzoate; Phase B: Cyclopentasiloxane 8-20%; Octyl Methicone 3%; Phase C: Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone 1-3%; Cetyl PEG / PPG-10 / 1 Dimethicone 1-3%; Acrylates / Dimethicone Copolymer 1-5%; Titanium Dioxide 6-15%; Phase D: Disteardimethylammonium hectorite 0.9%; Silica 1-5%; Phase E: 1-5% phenylbenzimidazole sulfonic acid; 0.1% disodium EDTA; 3% butylene glycol; 4% glycerol; 0.5% ethylhexylglycerol; 0.5% 1,2-hexanediol; 0.1% dipotassium glycyrrhizinate; 0.15% caprylyl glycol; 0.5% sodium chloride; the balance is deionized water; Phase F: aminomethyl propanol 0.02%; Phase G: Aloe vera extract 0.01-2%; Bisabolol 0.01-1%; Ginger root extract 0.01-1%; Tocopherol 0.01-1%; Phase H: color-changing powder 0.1-10%; The total mass percentage of all the raw materials in the above-mentioned phase A-phase H is 100%.

10. The method for preparing the multi-effect color-changing sunscreen isolation cream according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, pretreatment: mix phase B and homogenize at high speed of 3000-10000 rpm for 10 min until there are no obvious agglomerated particles, then soak for 1-2 h and homogenize again under the same conditions, apply the homogenized slurry on a black and white card, and there is no white spot, thus obtaining the pretreated phase B; S2, place phase A in an emulsifying pot and heat to 80-85°C, slowly stir until completely dissolved, cool to room temperature, then add phase B after pretreatment in S1 to the emulsifying pot and homogenize at 3000-10000rpm for 5-10min until completely dispersed; then continue to add phase C to the emulsifying pot, homogenize at 3000-10000rpm for 3-10min to fully activate and expand phase C, then continue to add phase D, homogenize at 3000-5000rpm for 3min until completely dispersed without particles; S3, add phase E to the water phase pot, stir and dissolve at a rate of 300-1000rpm until a transparent solution is obtained, then slowly add phase F to the water phase pot, stirring while adding, until the solution is transparent and the pH of the solution is 7.2-7.5; start stirring at 20-50rpm, then homogenize at 2000-2500rpm, then slowly add the solution in the water phase pot to the emulsifying pot, while increasing the stirring rate to 50-100rpm, increase the homogenization speed to 3000-10000rpm, and continue for 10min; S4, continue to add the G phase raw material into S3 and mix it into the emulsifying pot, with the stirring and homogenizing rates being 50-100rpm and 3000-10000rpm respectively, for 3-5min; finally, continue to slowly add the H phase raw material into the emulsifying pot, stirring while adding, with the stirring speed controlled at 100-300rpm, until it is stirred evenly without particles.

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