Pre-makeup with sunscreen function and preparation method of pre-makeup

Abstract

The invention relates to the technical field of cosmetics, in particular to pre-makeup with a sunscreen function and a preparation method of the pre-makeup. The invention discloses makeup pre-emulsion. Comprising the following preparation raw materials in parts by weight: 2.5 to 3 parts of PEG-8 (Polyethylene Glycol) polydimethylsiloxane, 0.7 to 1 part of polydimethylsiloxane PEG-7 phosphate, 0.25 to 0.35 part of sodium stearoyl glutamate, 0.0005 to 0.0008 part of polysorbate-20, 0.08 to 0.1 part of aluminum hydroxide, 0.7 to 0.9 part of mica, 18 to 20 parts of a sun-screening agent, 7.5 to 8.5 parts of a humectant, 0.008 to 0.01 part of an antioxidant, 0.08 to 0.1 part of a preservative, 0.8 to 1 part of a thickening agent, 1.5 to 1.6 parts of a coloring agent and 0.1 to 0.2 part of a plant extract. And 63 to 67 parts of deionized water. By optimizing the formula and adding specific components, the prepared makeup pre-emulsion with the sunscreen function realizes an excellent sunscreen effect and skin feeling improvement, has multiple effects of moisturizing, resisting oxidation, protecting skin and the like, and is a mild and effective sunscreen product.

Description

Technical Field

[0001] The present application relates to the technical field of cosmetics, and in particular to a primer with sun protection function and a preparation method thereof. Background Art

[0002] In the cosmetics industry, primer is a commonly used makeup product. Its primary function is to condition the skin and provide better adhesion and finish for subsequent base makeup products. Modern consumers seek makeup products that "integrate color and skincare" and desire primers that combine various skincare benefits. However, traditional primers often offer only single moisturizing or oil-control effects, failing to meet the diverse needs of modern consumers.

[0003] As people become more aware of skin health, sun protection and skincare have become part of daily life. While existing makeup primers offer some sun protection, they often suffer from issues like low SPF, poor moisturizing, and easy fading. Currently, most sunscreen primers on the market utilize physical or chemical sunscreen ingredients, such as titanium dioxide, zinc oxide, and salicylate compounds, but their effectiveness, comfort, and durability still need improvement. The sun protection offered by existing primers is limited by their formula design, often failing to balance high SPF with a good skin feel. Furthermore, their protective properties gradually weaken with prolonged exposure to UV rays, increasing the risk of skin damage. Summary of the Invention

[0004] In response to the shortcomings of the prior art, the present application provides a primer with sunscreen function and a preparation method thereof. The primer with sunscreen function prepared in the present application has excellent sunscreen efficacy and can gently and effectively protect the skin from UV damage. It also significantly improves the skin feel of the product, achieving a perfect balance between lightness, breathability and long-lasting fit. By adding a synergist, when used in a primer product, the primer can be more evenly covered on all parts of the skin, improving the utilization efficiency of the primer and thus enhancing the sunscreen effect. In addition, the synergist can prevent the sunscreen from penetrating the skin and firmly adhere the sunscreen to the skin, thereby improving the sunscreen effect and the durability of the sunscreen.

[0005] In a first aspect, the present application provides a primer with sun protection function, which adopts the following technical solution: A makeup base with sunscreen function comprises the following raw materials, calculated by weight: 2.5-3 parts of PEG-8 polydimethicone, 0.7-1 part of polydimethicone PEG-7 phosphate, 0.25-0.35 parts of sodium stearoyl glutamate, 0.0005-0.0008 parts of polysorbate 20, 0.08-0.1 parts of aluminum hydroxide, 0.7-0.9 parts of mica, 18-20 parts of sunscreen, 7.5-8.5 parts of moisturizer, 0.008-0.01 parts of antioxidant, 0.08-0.1 parts of preservative, 0.8-1 parts of thickener, 1.5-1.6 parts of colorant, 0.1-0.2 parts of plant extract, and 63-67 parts of deionized water.

[0006] Using this technology, PEG-8 dimethicone, dimethicone PEG-7 phosphate, sodium stearoyl glutamate, and polysorbate 20 act as emulsifiers, helping to form a stable emulsion system and providing a lightweight texture and good spreadability. Aluminum hydroxide and mica act as fillers, also providing a lustrous effect and UV reflection. Sunscreens such as ethylhexyl methoxycinnamate, ethylhexyl salicylate, diethylamino hydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine provide broad-spectrum UV protection. Humectants retain moisture and provide moisturizing effects. Antioxidants and preservatives protect the product from oxidation and microbial contamination. Thickeners adjust the product's texture and viscosity. Colorants provide color and aesthetic appeal. Plant extracts such as opuntia cactus stem extract, chordate extract, and hyaluronic acid leaf extract provide additional bioactive ingredients and enhance sun protection. Deionized water: Serves as a solvent and diluent, ensuring product uniformity and stability. These ingredients work together to form a comprehensive sunscreen system. Overall, these ingredients interact to provide a highly effective, mild, and long-lasting sunscreen protection system, while ensuring a lightweight, breathable, and long-lasting feel.

[0007] Preferably, the sunscreen is prepared by mixing ethylhexyl methoxycinnamate, ethylhexyl salicylate, diethylamino hydroxybenzoyl hexyl benzoate and bis-ethylhexyloxyphenol methoxyphenyl triazine in a mass ratio of 10:4:3:1.6.

[0008] By adopting the above technical solution, ethylhexyl methoxycinnamate effectively absorbs UV rays between 280 and 310 nm, with the greatest protection at 310 nm. This not only protects the product's appearance but also provides effective sun protection. Furthermore, ethylhexyl methoxycinnamate is less irritating to the skin and offers a relatively good safety profile. Ethylhexyl salicylate is a lipid compound primarily derived from natural tree bark extracts. It can reduce pigmentation, minimize pores, eliminate fine wrinkles, and improve sun-induced aging. Diethylaminohydroxybenzoyl hexyl benzoate effectively absorbs and blocks UVA rays, protecting the skin from UV damage. It also exhibits excellent stability and safety. Bis-ethylhexyloxyphenol methoxyphenyl triazine provides broad-spectrum UV protection, reducing UV damage to the skin and preventing sunburn, tanning, and photoaging, wrinkles, and dark spots caused by long-term exposure. The synergistic effect of these four ingredients enhances sun protection while reducing skin irritation and side effects. They work together to form a protective layer on the skin's surface, effectively shielding the skin from UV damage. Additionally, these ingredients offer some moisturizing and antioxidant benefits, helping to improve skin texture and slow the aging process.

[0009] Preferably, the plant extract is at least one of an opuntia cactus stem extract, a chordate extract and a scutellaria baicalensis leaf extract.

[0010] Preferably, the plant extract consists of Opuntia fasciata stem extract, Herba Lycopodii flavescentis extract and Herba Coleopterae leaf extract in a mass ratio of 7:4:3.

[0011] By adopting the above technical solution, the Xiantao cactus stem extract, whose main components are polysaccharides, fatty acids, and amino acids, has skin-relieving effects such as reducing skin irritation, anti-inflammatory and antibacterial, promoting wound healing, alleviating itching, and providing antioxidant benefits. The elm extract has anti-inflammatory and skin-soothing properties, relieving redness, itching, and other discomforts caused by external irritants. It also enhances the skin's immunity and resistance, effectively combating damage caused by free radicals and environmental pollution. The snakewort leaf extract is rich in flavonoids and polyphenols, exhibiting antioxidant and anti-inflammatory properties, alleviating skin inflammation and promoting skin repair. When these three plant extracts are combined in a mass ratio of 7:4:3, they complement each other and work synergistically. Specific benefits include: 1. Enhanced sun protection: The antioxidants in these plant extracts effectively absorb ultraviolet rays, reducing UV damage to the skin and protecting it from sunburn and photoaging. 2. Strengthen the skin barrier function: The anti-inflammatory ingredients in these plant extracts can relieve skin inflammation and promote skin repair, thereby strengthening the skin's barrier function. 3. Boost the skin's immunity: Collard extract can enhance the skin's immunity and improve its resistance. Overall, the synergistic effect of these three plant extracts can significantly enhance the sun protection efficacy of the sunscreen primer, while also protecting the skin from various external stimuli.

[0012] Preferably, the invention further comprises 0.1-0.2 parts of a synergist, wherein the synergist is composed of diisostearyl polyglycerol-3 dimer linoleate, tara gum and pullulan in a mass ratio of 5:3:8.

[0013] By adopting the above technical solution, diisostearoyl polyglyceryl-3 dimer linoleate is a natural film-forming polymer with excellent water-resistance. It can reduce the stickiness of products and make them more refreshing. Taraxacum officinale gum is a naturally derived rheology modifier with advantages such as efficient thickening, no stringiness, and a pleasant skin feel. Pullulan is a natural polysaccharide produced by natural yeast fermentation, with certain film-forming and thickening properties. The synergistic effect of these three ingredients in the synergist is mainly reflected in the following aspects: 1. Film-forming property: Diisostearoyl polyglyceryl-3 dimer linoleate and pullulan both have certain film-forming properties, forming a protective film on the skin surface to protect against direct UV radiation. Pullulan's film-forming properties also enhance the adhesion of sunscreens to the skin and prevent loss of sunscreen. 2. Thickening effect: Taraxacum officinale gum and pullulan both have thickening effects, which can make the product texture more delicate and uniform while also providing a pleasant skin feel. The thickening effect of tara gum can also prevent the product from stringing during application. 3. Synergistic effect: The synergistic effect between diisostearoyl polyglyceryl-3 dimer linoleate, tara gum and pullulan is mainly reflected in that they jointly improve the utilization efficiency and sun protection durability of the sunscreen. The film-forming properties of diisostearoyl polyglyceryl-3 dimer linoleate and the film-forming properties of pullulan work together to make the sunscreen more evenly covered all over the skin. At the same time, the thickening effect of tara gum and the thickening effect of pullulan work together to prevent the sunscreen from penetrating into the skin and firmly fix the sunscreen on the skin. In summary, the synergistic effect of these ingredients in the synergist is mainly reflected in improving the utilization efficiency and sun protection durability of the sunscreen, while also improving the texture and skin feel of the product.

[0014] Preferably, the moisturizing agent is prepared by mixing glycerin, propylene glycol, panthenol, tocopheryl acetate, butylene glycol and 1,2-hexanediol in a mass ratio of 5.25:2.5:0.3:0.05:0.01:0.006.

[0015] Preferably, the antioxidant is butylated hydroxytoluene; and the preservative is prepared by mixing phenoxyethanol and ethylhexylglycerin in a mass ratio of 9:1.

[0016] Preferably, the thickener is prepared by mixing ammonium acryloyldimethyltaurate / VP copolymer, hydroxyethyl acrylate sodium acryloyldimethyltaurate copolymer and stearic acid in a mass ratio of 20:20:3.

[0017] Preferably, the colorant is prepared by mixing tin oxide, CI77891, CI77491 and CI77492 in a mass ratio of 0.0045:1.5:0.06-0.09:0.05-0.008.

[0018] In a second aspect, the present application provides a method for preparing a primer with sunscreen function, using the following technical solution: As a general technical concept, the present application also provides a method for preparing the above-mentioned primer with sunscreen function, comprising the following steps: S101. Mix one-half of deionized water and a thickener according to their weight ratios, heat to 65-70°C, and stir evenly to obtain Liquid A. S102. Add aluminum hydroxide, mica, sunscreen, moisturizer, antioxidant, preservative, and plant extract to Solution A in order of parts by mass, heat to 70° C., and stir evenly to obtain Solution B; S103. Mix PEG-8 polydimethicone, polydimethicone PEG-7 phosphate, sodium stearoyl glutamate, polysorbate 20 and the remaining deionized water in order according to their mass fractions, heat to 70°C, and stir evenly to obtain liquid C; S104. Emulsify liquid B and liquid C in order according to their mass fractions at a high-speed shear speed of 8000 rpm for 5-10 minutes, then cool to 40-50°C, add the remaining raw materials and homogenize at a homogenization rate of 2000-3000 rpm and a homogenization time of 8-12 minutes to obtain a primer with sun protection function.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. Significant sun protection effect: By adding sunscreen, plant extracts and synergists, the utilization efficiency and sun protection effect of sunscreen are improved, while preventing sunscreen from penetrating into the skin, firmly fixing the sunscreen on the skin, and improving the sun protection effect and durability.

[0020] 2. Improved skin feel: By adjusting the mass ratio of each raw material, a perfect balance between lightness, breathability and long-lasting fit is achieved, greatly improving the skin feel of the product.

[0021] 3. Skin Protection: The antioxidants in the added plant extracts effectively absorb UV rays, reducing UV damage to the skin and protecting it from sunburn and photoaging. At the same time, the anti-inflammatory ingredients can relieve skin inflammation, promote skin repair, and enhance the skin's barrier function.

[0022] 4. Moisturizing and Antioxidant: The ingredients in sunscreen also have certain moisturizing and antioxidant effects, which help improve skin texture and delay the aging process.

[0023] 5. Gentle and effective: The primer of the present application has a mild and effective sun protection effect, which can protect the skin from the damage of ultraviolet rays while reducing irritation and side effects to the skin. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below with reference to the examples, but those skilled in the art will understand that the following examples are only used to illustrate the present application and should not be considered to limit the scope of the present application. If the specific conditions are not specified in the examples, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used that do not indicate the manufacturer are all conventional products that can be purchased commercially. The Xiantao cactus stem extract is purchased from Bionap, Italy; the snake lady leaf extract is purchased from Ningxia Vanilla Biotechnology Co., Ltd., water extraction, extraction ratio 10: 1; the feather grass extract is purchased from DSM Nutritional Products Ltd.; the colorants CI77891, CI77491 and CI77492 are all purchased from Sanhao Cosmetics Lin Material (Suzhou) Co., Ltd.

[0025] In the following examples, 1 portion means 100 g.

[0026] Example 1 A makeup base with sunscreen function, comprising the following raw materials, calculated by weight: 2.5 parts of PEG-8 polydimethicone, 0.7 parts of polydimethicone PEG-7 phosphate, 0.25 parts of sodium stearoyl glutamate, 0.0005 parts of polysorbate 20, 0.08 parts of aluminum hydroxide, 0.7 parts of mica, 18 parts of sunscreen, 7.5 parts of moisturizer, 0.008 parts of butylated hydroxytoluene, 0.08 parts of preservative, 0.8 parts of thickener, 1.5 parts of colorant, 0.1 parts of plant extract, and 63 parts of deionized water. The sunscreen is a mixture of ethylhexyl methoxycinnamate, ethylhexyl salicylate, diethylaminohydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine in a weight ratio of 10:4:3:1.6. The invention relates to a novel herbal tea plant comprising a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract, a herbal tea plant extract,

[0027] The method for preparing the above-mentioned primer with sunscreen function comprises the following steps: S101. Mix one-half of deionized water and a thickener according to their weight ratios, heat to 65° C., and stir evenly to obtain Liquid A. S102. Add aluminum hydroxide, mica, sunscreen, moisturizer, butylated hydroxytoluene, preservative, and plant extract to Solution A in order of parts by mass, heat to 70° C., and stir evenly to obtain Solution B; S103. Mix PEG-8 polydimethicone, polydimethicone PEG-7 phosphate, sodium stearoyl glutamate, polysorbate 20 and the remaining deionized water in order according to their mass fractions, heat to 70°C, and stir evenly to obtain liquid C; S104. Emulsify liquid B and liquid C in order according to their mass fractions at a high-speed shear speed of 8000 rpm for 5 minutes, then cool to 50°C, add the remaining raw materials and homogenize at a homogenization rate of 2000 rpm and a homogenization time of 12 minutes to obtain a primer with sun protection function.

[0028] Example 2 A makeup base with sunscreen function comprises the following raw materials, calculated by weight: 3 parts of PEG-8 polydimethicone, 1 part of polydimethicone PEG-7 phosphate, 0.35 parts of sodium stearoyl glutamate, 0.0008 parts of polysorbate 20, 0.1 part of aluminum hydroxide, 0.9 part of mica, 20 parts of sunscreen, 8.5 parts of moisturizer, 0.01 part of butylated hydroxytoluene, 0.1 part of preservative, 1 part of thickener, 1.6 parts of colorant, 0.2 parts of plant extract, and 67 parts of deionized water. The sunscreen is prepared by mixing ethylhexyl methoxycinnamate, ethylhexyl salicylate, diethylaminohydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine in a weight ratio of 10:4:3:1.6. The plant extract is an extract of the stem of the angelica cactus. The moisturizer is prepared by mixing glycerin, propylene glycol, panthenol, tocopheryl acetate, butylene glycol and 1,2-hexanediol in a mass ratio of 5.25:2.5:0.3:0.05:0.01:0.006. The preservative is prepared by mixing phenoxyethanol and ethylhexylglycerin in a mass ratio of 9:1. The thickener is prepared by mixing ammonium acryloyldimethyltaurate / VP copolymer, hydroxyethyl acrylate sodium acryloyldimethyltaurate copolymer and stearic acid in a mass ratio of 20:20:3. The colorant is prepared by mixing tin oxide, CI77891, CI77491 and CI77492 in a mass ratio of 0.0045:1.5:0.09:0.008.

[0029] The method for preparing the above-mentioned primer with sunscreen function comprises the following steps: S101. Mix one-half of deionized water and a thickener according to their weight ratios, heat to 70° C., and stir evenly to obtain Liquid A. S102. Add aluminum hydroxide, mica, sunscreen, moisturizer, butylated hydroxytoluene, preservative, and plant extract to Solution A in order of parts by mass, heat to 70° C., and stir evenly to obtain Solution B; S103. Mix PEG-8 polydimethicone, polydimethicone PEG-7 phosphate, sodium stearoyl glutamate, polysorbate 20 and the remaining deionized water in order according to their mass fractions, heat to 70°C, and stir evenly to obtain liquid C; S104. Emulsify liquid B and liquid C in order according to their mass fractions at a high-speed shear speed of 8000 rpm for 10 minutes, then cool to 50°C, add the remaining raw materials and homogenize at a homogenization rate of 3000 rpm and a homogenization time of 8 minutes to obtain a primer with sun protection function.

[0030] Example 3 A makeup base with sunscreen function, comprising the following raw materials, calculated by mass: 2.8 parts of PEG-8 polydimethicone, 0.9 parts of polydimethicone PEG-7 phosphate, 0.3 parts of sodium stearoyl glutamate, 0.0007 parts of polysorbate 20, 0.09 parts of aluminum hydroxide, 0.8 parts of mica, 19 parts of sunscreen, 8 parts of moisturizer, 0.009 parts of butylated hydroxytoluene, 0.09 parts of preservative, 0.9 parts of thickener, 1.52 parts of colorant, 0.15 parts of plant extract, and 65 parts of deionized water. The sunscreen is prepared by mixing ethylhexyl methoxycinnamate, ethylhexyl salicylate, diethylaminohydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine in a mass ratio of 10:4:3:1.6. The plant extract is an extract of the stem of the xiantao cactus, the moisturizer is prepared by mixing glycerin, propylene glycol, panthenol, tocopheryl acetate, butylene glycol and 1,2-hexanediol in a mass ratio of 5.25:2.5:0.3:0.05:0.01:0.006, the preservative is prepared by mixing phenoxyethanol and ethylhexylglycerin in a mass ratio of 9:1, the thickener is prepared by mixing ammonium acryloyldimethyltaurate / VP copolymer, hydroxyethyl acrylate sodium acryloyldimethyltaurate copolymer and stearic acid in a mass ratio of 20:20:3, and the colorant is prepared by mixing tin oxide, CI77891, CI77491 and CI77492 in a mass ratio of 0.0045:1.5:0.07:0.06.

[0031] The method for preparing the above-mentioned primer with sunscreen function comprises the following steps: S101. Mix one-half of deionized water and a thickener according to their weight ratios, heat to 68° C., and stir evenly to obtain Liquid A. S102. Add aluminum hydroxide, mica, sunscreen, moisturizer, butylated hydroxytoluene, preservative, and plant extract to Solution A in order of parts by mass, heat to 70° C., and stir evenly to obtain Solution B; S103. Mix PEG-8 polydimethicone, polydimethicone PEG-7 phosphate, sodium stearoyl glutamate, polysorbate 20 and the remaining deionized water in order according to their mass fractions, heat to 70°C, and stir evenly to obtain liquid C; S104. Emulsify liquid B and liquid C in order according to their mass fractions at a high-speed shear speed of 8000 rpm for 8 minutes, then cool to 45°C, add the remaining raw materials and homogenize at a homogenization rate of 2500 rpm and a homogenization time of 10 minutes to obtain a primer with sun protection function.

[0032] Example 4 The same as Example 3, except that the plant extract is lycopodiella vulgaris extract.

[0033] Example 5 The same as Example 3, except that: the plant extract is the extract of Coptis chinensis leaves.

[0034] Example 6 The same as Example 3, except that: the plant extract consists of Opuntia chinensis stem extract, Herba Lycopodii extract and Herba Coleopterae leaf extract in a mass ratio of 7:4:3.

[0035] Example 7 The same as Example 6, except that: 0.15 parts of a synergist is further included, and the synergist is composed of diisostearyl polyglycerol-3 dimer linoleate, tara gum and pullulan in a mass ratio of 5:3:8.

[0036] Comparative Example 1 The same as Example 7, except that the synergist is diisostearyl polyglyceryl-3 dimer linoleate.

[0037] Comparative Example 2 The same as Example 7, except that the synergist is tara gum.

[0038] Comparative Example 3 The same as Example 7, except that the synergist is pullulan.

[0039] Comparative Example 4 The same as Example 7, except that the sunscreen is ethylhexyl methoxycinnamate.

[0040] Comparative Example 5 Same as Example 7, except that: the sunscreen is ethylhexyl salicylate.

[0041] Comparative Example 6 The same as Example 7, except that the sunscreen is diethylamino hydroxybenzoyl hexyl benzoate.

[0042] Comparative Example 7 The same as Example 7, except that the sunscreen is bis-ethylhexyloxyphenol methoxyphenyl triazine.

[0043] Performance testing The makeup primers with sunscreen function prepared in Examples 1 to 7 and Comparative Examples 1 to 7 were sampled and subjected to the following tests. The results are shown in Table 1.

[0044] A total of 140 volunteers, both male and female, aged 20-55 years, were selected. Inclusion criteria included dry skin, dull complexion, and makeup that easily caked and did not adhere properly. Exclusion criteria included no skin disease, no participation in other trials within 30 days, and no laser cosmetic procedures within 30 days. The volunteers were randomly divided into 14 groups of 10, each assigned a different primer.

[0045] Experiment 1: Take 1g of primer and apply it evenly on the inner 5cm of the forearm of the corresponding volunteers 2 After the experimental samples were completely absorbed in the area, the SPF value and UVAPF value of the corresponding primer were measured with the UV2000S sun protection factor analyzer. The average value of the measurement results was taken, see Table 1.

[0046] Experiment 2: Volunteers used primer once in the morning and once in the evening every day, with a dosage of 1g each time, for 28 consecutive days.

[0047] The skin surface stratum corneum moisture content on day 0 and day 28 was measured using a skin stratum corneum moisture content meter (CK, CM825, Germany), and the skin surface stratum corneum moisture content change rate (%) was calculated: skin surface stratum corneum moisture content change rate (%) = (skin surface stratum corneum moisture content on day 28 - skin surface stratum corneum moisture content on day 0) / skin surface stratum corneum moisture content on day 0 * 100%.

[0048] The skin glossiness was measured on day 0 and day 28 using a skin glossiness tester (CK, GL200, Germany). The skin glossiness change rate (%) = (skin glossiness on day 28 - skin glossiness on day 0) / skin glossiness on day 0 * 100%.

[0049] The above experimental results are averaged and shown in Table 1.

[0050] Table 1 Performance test Sensory evaluation test 1. Test on concealing pores and smoothing fine lines Samples of the sunscreen primers prepared in Examples 1-7 and Comparative Examples 1-7 were collected for testing. One hundred and forty female volunteers aged 28-35, meeting the test requirements, were selected as subjects. These volunteers were randomly divided into 14 groups of 10 participants each. Each group was assigned a different primer. Equal amounts of each test sample were applied to the left and right sides of the subjects' faces, and changes in pores and wrinkles on both sides were observed.

[0051] The test was scored on a 5-point scale: 5 - very effective; 4 - quite effective; 3 - somewhat effective; 2 - somewhat effective; 1 - not effective at all. Participants scored according to the above criteria, and all scores were tallied and averaged.

[0052] 2. Test the effect of primer before makeup Samples of the sunscreen primers prepared in Examples 1-7 and Comparative Examples 1-7 were collected for testing. One hundred and forty female volunteers aged 28-35, meeting the test requirements, were selected as subjects. These volunteers were randomly divided into 14 groups of 10 participants each. Each group was assigned a different primer. Equal amounts of each test sample were applied to the left and right sides of the subjects' cheeks. The makeup appearance was observed four hours later.

[0053] Scoring: 5-point scale based on ease of foundation application, foundation finish, and overall results after 4 hours: 5 - Very Satisfied; 4 - Satisfied; 3 - Average; 2 - Dissatisfied; 1 - Very Dissatisfied. Participants scored according to the above criteria, and all scores were averaged.

[0054] The results of the above-mentioned pore concealing and fine line smoothing tests, as well as the makeup primer effect are shown in Table 2.

[0055] Table 2 Sensory evaluation test Analyzing the data in Table 1 and Table 2, we can see that: 1) The sunscreen primers prepared in Examples 1-7 exhibit excellent sunscreen efficacy, gently and effectively protecting the skin from UV rays. They also significantly improve the skin feel, achieving a perfect balance between lightness, breathability, and long-lasting adherence. The addition of a synergist allows for more even coverage of the primer on the skin when used in a primer product, increasing its utilization efficiency and thus enhancing its sunscreen effectiveness. Furthermore, the synergist prevents sunscreen from penetrating the skin and firmly bonds it to the skin, enhancing both its effectiveness and durability.

[0056] 2) A comparative analysis of the performance of the makeup primer with sunscreen function prepared in Example 6 and Examples 3-5 shows that the plant extracts are composed of Opuntia fasciata stem extract, Feather Grass extract and Coptis chinensis leaf extract in a mass ratio of 7:4:3. The synergistic effect between them can significantly improve the sunscreen efficacy of the makeup primer with sunscreen function, while also protecting the skin from various external stimuli. The specific synergistic effects include: 1. Improving the sunscreen effect: The antioxidant ingredients in these plant extracts can effectively absorb ultraviolet rays, reduce the damage of ultraviolet rays to the skin, and protect the skin from sunburn and photoaging. 2. Enhancing the skin barrier function: The anti-inflammatory ingredients in these plant extracts can relieve skin inflammation, promote skin repair, and thus enhance the skin's barrier function. 3. Enhancing the skin's immunity: Feather Grass extract can enhance the skin's immunity and improve the skin's resistance.

[0057] 3) A comparative analysis of the performance of the sunscreen primers prepared in Example 7 and Example 6 demonstrates that the addition of a synergist allows for more even coverage of the primer on the skin, improving its utilization efficiency and thus enhancing its sunscreen effectiveness. Furthermore, the synergist prevents sunscreen from penetrating the skin and firmly bonds it to the skin, enhancing both its effectiveness and durability.

[0058] 4) A comparative analysis of the performance of the sunscreen primers prepared in Example 7 and Comparative Examples 1-3 shows that the synergist, composed of diisostearoyl polyglyceryl-3 dimer linoleate, tara gum, and pullulan in a mass ratio of 5:3:8, leverages the film-forming properties of diisostearoyl polyglyceryl-3 dimer linoleate and pullulan to more evenly coat the skin. Furthermore, the thickening effects of tara gum and pullulan work together to prevent the sunscreen from penetrating the skin and firmly adhere it to the skin, improving the sunscreen's utilization efficiency and long-lasting protection, while also improving the product's texture and feel.

[0059] 5) A comparative analysis of the performance of the sunscreen primers prepared in Example 7 and Comparative Examples 4-7 shows that the sunscreen, prepared by mixing ethylhexyl methoxycinnamate, ethylhexyl salicylate, diethylaminohydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine in a mass ratio of 10:4:3:1.6, leverages the synergistic effect of these four ingredients to enhance sunscreen effectiveness while reducing skin irritation and side effects. They work together to form a protective film on the skin surface, effectively shielding the skin from UV damage.

[0060] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the above embodiments provide a detailed description of the present application, relevant technical personnel should understand that the specific implementation methods of the present application may still be modified or replaced by equivalents. Any modifications and equivalent replacements that do not depart from the spirit and scope of the present application should be included in the scope of protection of the present application.

Claims

1. A makeup base with sun protection function, characterized in that: The preparation comprises the following raw materials, calculated by mass: 2.5-3 parts of PEG-8 polydimethylsiloxane, 0.7-1 parts of polydimethylsiloxane PEG-7 phosphate, 0.25-0.35 parts of sodium stearoyl glutamate, 0.0005-0.0008 parts of polysorbate 20, 0.08-0.1 parts of aluminum hydroxide, 0.7-0.9 parts of mica, 18-20 parts of sunscreen, 7.5-8.5 parts of moisturizer, 0.008-0.01 parts of antioxidant, 0.08-0.1 parts of preservative, 0.8-1 parts of thickener, 1.5-1.6 parts of colorant, 0.1-0.2 parts of plant extract and 63-67 parts of deionized water.

2. The makeup base with sun protection function according to claim 1, characterized in that: The sunscreen is prepared by mixing ethylhexyl methoxycinnamate, ethylhexyl salicylate, diethylamino hydroxybenzoyl hexyl benzoate and bis-ethylhexyloxyphenol methoxyphenyl triazine in a mass ratio of 10:4:3:1.

6.

3. The makeup base with sun protection function according to claim 1, characterized in that: The plant extract is at least one of an opuntia cactus stem extract, a chordate extract and a scutellaria baicalensis leaf extract.

4. The makeup base with sun protection function according to claim 3, characterized in that: The plant extract consists of an opuntia cactus stem extract, a chordate extract and a scutellaria baicalensis leaf extract in a mass ratio of 7:4:

3.

5. The makeup base with sun protection function according to claim 1, characterized in that: The invention also includes 0.1-0.2 parts of a synergist, which is composed of diisostearyl polyglycerol-3 dimer linoleate, tara gum and pullulan in a mass ratio of 5:3:

8.

6. The makeup base with sun protection function according to claim 1, characterized in that: The moisturizing agent is prepared by mixing glycerin, propylene glycol, panthenol, tocopheryl acetate, butylene glycol and 1,2-hexanediol in a mass ratio of 5.25:2.5:0.3:0.05:0.01:0.

006.

7. The makeup base with sun protection function according to claim 1, characterized in that: The antioxidant is butylated hydroxytoluene; the preservative is prepared by mixing phenoxyethanol and ethylhexylglycerin in a mass ratio of 9:

1.

8. The makeup base with sun protection function according to claim 1, characterized in that: The thickener is prepared by mixing ammonium acryloyldimethyltaurate / VP copolymer, hydroxyethyl acrylate sodium acryloyldimethyltaurate copolymer and stearic acid in a mass ratio of 20:20:

3.

9. The makeup base with sun protection function according to claim 1, characterized in that: The colorant is prepared by mixing tin oxide, CI77891, CI77491 and CI77492 in a mass ratio of 0.0045:1.5:0.06-0.09:0.05-0.

008.

10. A method for preparing a makeup base with sunscreen function according to any one of claims 1 to 9, characterized in that: The following steps are involved: S101. Mix one-half of deionized water and a thickener according to their weight ratios, heat to 65-70°C, and stir evenly to obtain Liquid A. S102. Add aluminum hydroxide, mica, sunscreen, moisturizer, antioxidant, preservative, and plant extract to Solution A in order of parts by mass, heat to 70° C., and stir evenly to obtain Solution B; S103. Mix PEG-8 dimethicone, dimethicone PEG-7 phosphate, sodium stearoyl glutamate, polysorbate 20, and the remaining deionized water in order according to their weight ratios, heat to 70° C., and stir evenly to obtain Solution C. S104. Emulsify liquid B and liquid C according to their mass fractions at a high-speed shear rate of 8000 rpm for 5-10 minutes, then cool to 40-50° C., add the remaining raw materials and homogenize at a homogenization rate of 2000-3000 rpm for 8-12 minutes to obtain a primer with sunscreen function.

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