Sunscreen composition and use thereof

Abstract

The application discloses a sunscreen composition and application thereof, and relates to a sunscreen composition containing a sophora fruit extract, a scutellaria extract, a tagetes extract and a rosemary extract, wherein the mass ratio of the sophora fruit extract, the scutellaria extract, the tagetes extract and the rosemary extract is 1:0.2-0.4:1.5-2.5:0.3-0.5; the above-mentioned extract composition has achieved a prominent synergistic effect in sunscreen; in the case of the same content, the sunscreen effect of the composition is better, the sunscreen effect can be realized with a relatively low addition amount, the disadvantages caused by too much addition amount can be reduced or even avoided, and the composition can be used in sunscreen cosmetics.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products, specifically to a sunscreen composition and its application. Background Technology

[0002] In recent years, with the continuous destruction of the ozone layer, ultraviolet radiation has been increasing. When the human body is exposed to sunlight for a long time, ultraviolet radiation poses a great threat to human health. UVB (280~320nm) ultraviolet radiation has an erythema effect on the human body and can promote the metabolism of minerals and the formation of vitamin D in the body; however, it can also cause immediate skin damage. Mild cases may cause redness and swelling of the skin, while severe cases may cause erythema and blisters, leading to sunburn, peeling, and tanning. It is the main cause of skin redness, inflammation, and sunburn. In addition, UVB can also cause cellular DNA damage, skin tumors, immunosuppression, and even skin cancer. UVA (320~400nm) wavelengths have strong penetrating power, capable of passing through most transparent glass and plastics. Over 95% of the long-wave UVA in sunlight can penetrate the ozone layer and clouds to reach the Earth's surface. UVA can refract into indoor spaces, also known as indoor ultraviolet radiation. It can penetrate the skin's surface and reach deep into the dermis, damaging the skin's fine structures such as collagen and elastin fibers, leading to sagging skin and wrinkles. Furthermore, UVA oxidizes melanin in the epidermis, directly tanning the skin, and over time, this can cause photoaging, resulting in sagging skin and fine lines. Current research suggests that plant-based active ingredients are gentle on the skin, have low irritation, and are highly safe, making them safer, more reliable, and more readily available than traditional organic sunscreens. Studies also indicate that some plant-based active ingredients have anti-inflammatory and antioxidant effects, but their practical application is not significant, requiring large-scale addition. This presents cost and technological challenges for large-scale application, potentially leading to decreased stability and a poorer skin feel. Even with significantly increased dosage, the efficacy is unlikely to increase substantially. Summary of the Invention

[0003] The purpose of this invention is to overcome one or more shortcomings of the prior art and provide a new sunscreen composition.

[0004] The present invention also provides the application of the above-mentioned new sunscreen composition in the preparation of sunscreen cosmetics.

[0005] To achieve the above objectives, the present invention employs the following technical solution: A sunscreen composition comprising Sophora japonica flower extract, Scutellaria baicalensis extract, Marigold extract and Rosemary extract, wherein the mass ratio of the Sophora japonica flower extract, the Scutellaria baicalensis extract, the Marigold extract and the Rosemary extract is 1:0.2-0.4:1.5-2.5:0.3-0.5.

[0006] In some embodiments of the present invention, the mass ratio of the Sophora japonica extract, the Scutellaria baicalensis extract, the marigold extract and the rosemary extract is 1:0.25-0.35:1.7-2.2:0.35-0.45.

[0007] According to certain specific aspects of the present invention, the numerical range "0.2-0.4" in "feed mass ratio of 1:0.2-0.4:1.5-2.5:0.3-0.5" can be 0.2, 0.22, 0.23, 0.25, 0.26, 0.28, 0.29, 0.30, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.38, 0.40, etc.; the numerical range "1.5-2.5" can be 1.5, 1.6, 1.7, 1. 8, 1.85, 1.88, 1.9, 1.92, 1.95, 1.98, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, etc.; the numerical range "0.3-0.5" can be 0.30, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.38, 0.39, 0.395, 0.40, 0.405, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.48, 0.5, etc.

[0008] In some embodiments of the present invention, the Sophora japonica flower extract, the Scutellaria baicalensis extract, and the rosemary extract are each independently an extract obtained by solvent extraction of the raw materials, wherein the raw materials are the corresponding Sophora japonica flower, Scutellaria baicalensis, or rosemary.

[0009] In some embodiments of the present invention, the solvent is a diol ether or an aqueous solution thereof.

[0010] Furthermore, the diol ether is R1CH2CH(R2)CH2-O-CH2CH(R3)CH2R4; wherein R1, R2, R3, and R4 are independently selected from H and C. 1-3 Alkyl or hydroxyl, and two of R1, R2, R3, and R4 are selected from hydroxyl groups.

[0011] According to certain aspects of the present invention, R1 and R4 are independently selected from H and methyl, and R2 and R3 are both selected from hydroxyl groups.

[0012] In some embodiments of the present invention, the solvent is an aqueous solution of diol ether. Further, the mass concentration of the diol ether in the aqueous solution of diol ether is 10%-50%, for example, it can be 10%, 20%, 25%, 30%, 35%, 40%, 45%, etc.

[0013] In some embodiments of the present invention, the ratio of raw material to solvent is controlled to be 1:15-25, for example, it can be 1:15, 1:16, 1:18, 1:20, 1:22, 1:23, 1:25, etc.

[0014] In some embodiments of the present invention, the extraction temperature is controlled to be 60-80°C, for example, 60°C, 62°C, 65°C, 66°C, 68°C, 70°C, 72°C, 75°C, 78°C, 80°C, etc.

[0015] In some embodiments of the present invention, the Sophora japonica extract, the Scutellaria baicalensis extract, and the rosemary extract are all added in the form of extract solutions.

[0016] According to some specific aspects of the present invention, the Sophora japonica extract is added in the form of a Sophora japonica extract solution, which is prepared by the following method: Sophora japonica is washed, extracted with a diol ether aqueous solution, and then filtered through filter paper to obtain the Sophora japonica extract solution.

[0017] According to some specific aspects of the present invention, the Scutellaria baicalensis extract is added in the form of a Scutellaria baicalensis extract solution, which is prepared by the following method: Scutellaria baicalensis is washed, extracted with a diol ether aqueous solution, and then filtered through filter paper to obtain the Scutellaria baicalensis extract solution.

[0018] According to some specific aspects of the present invention, the rosemary extract is added in the form of a rosemary extract solution, which is prepared by the following method: rosemary is washed, extracted with an aqueous diol ether solution, and then filtered through filter paper to obtain the rosemary extract solution.

[0019] In some embodiments of the present invention, the marigold extract is obtained by extracting marigolds with an aqueous monohydric alcohol solution.

[0020] Furthermore, the marigold extract is added in the form of a marigold extract solution, which is prepared by the following method: mixing marigold with a monohydric alcohol aqueous solution, extracting under heating conditions, filtering, evaporating to obtain a paste intermediate, and dispersing the paste intermediate in oil to obtain the marigold extract solution.

[0021] Furthermore, the heating conditions are controlled so that the extraction is carried out at a temperature of 50-70°C, for example, at temperatures of 50°C, 52°C, 55°C, 58°C, 60°C, 62°C, 65°C, 68°C or 70°C.

[0022] Furthermore, the mass ratio of marigold to monohydric alcohol aqueous solution is controlled to be 1:15-25, for example, it can be 1:15, 1:16, 1:18, 1:20, 1:22, 1:23, 1:25, etc.

[0023] Furthermore, the fats include caprylic / capric triglycerides.

[0024] Furthermore, the monohydric alcohol in the aqueous monohydric alcohol solution includes ethanol.

[0025] Another technical solution provided by the present invention: a method for preparing a sunscreen composition, the method comprising: mixing and homogenizing the various extract components.

[0026] Another technical solution provided by the present invention: a sunscreen cosmetic, wherein the sunscreen cosmetic comprises a sunscreen agent, and the sunscreen agent comprises the sunscreen composition described above.

[0027] In some embodiments of the present invention, the sunscreen composition accounts for 0.1%-10% of the sunscreen cosmetic by weight percentage, and more particularly 0.3%-5%.

[0028] According to certain aspects of the present invention, the sunscreen composition in the sunscreen cosmetic comprises, by weight percentage, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.5%, 1.8%, 2.0%, 2.2%, 2.3%, 2.5%, 2.6%, 2.8%, 3.0%, 3.2%, 3.5%, 3.8%, 4.0%, 4.2%, 4.5%, 4.8%, 5.0%, 5.2%, 5.5%, 5.8%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, etc.

[0029] In some embodiments of the present invention, the sunscreen cosmetic comprises, by weight percentage: 5%-15% of a moisturizer, 0.5%-4% of a skin feel modifier, 0.1%-0.6% of ammonium acryloyl dimethyl taurate / VP copolymer, 0.05%-0.30% of polyacrylate crosspolymer-6, 0.02%-0.25% of hydroxypropyl methylcellulose stearoxy ether, 0.1%-10% of the sunscreen composition, 1%-30% of a base sunscreen agent, 0.1%-10% of a moisturizer, and 40%-65% of water.

[0030] Further, by weight percentage, the sunscreen cosmetic comprises: 5%-12% moisturizer, 1%-3% skin feel modifier, 0.1%-0.6% ammonium acryloyl dimethyl taurate / VP copolymer, 0.05%-0.30% polyacrylate crosspolymer-6, 0.02%-0.25% hydroxypropyl methylcellulose stearyl ether, 0.3%-8% of the sunscreen composition, 5%-30% base sunscreen agent, 0.1%-10% emollient, and 46%-65% water.

[0031] In some embodiments of the present invention, the humectant may be glycerin, butylene glycol, etc.

[0032] In some embodiments of the present invention, the skin feel modifier may be polymethylsilsesquioxane, etc.

[0033] In some embodiments of the present invention, the basic sunscreen agent in the sunscreen cosmetic, by weight percentage, includes: 8%-13% of C12-15 benzoyl alcohol, 5%-9% of titanium dioxide, 0.5%-1.7% of aluminum stearate, 0.5%-1.5% of polyhydroxystearic acid, and 0.2%-0.6% of aluminum oxide.

[0034] In some embodiments of the present invention, the emollient may include octyl polymethylsiloxane, ethylhexylglycerin, glyceryl caprylate, etc.

[0035] In some embodiments of the present invention, the sunscreen cosmetic contains, by weight percentage, 1%-3% octyl polymethylsiloxane, 0.05%-0.2% ethylhexylglycerin, and 0.05%-0.2% glyceryl caprylate.

[0036] In some embodiments of the present invention, the sunscreen cosmetic further comprises 1%-3% of 1,2-hexanediol and 0.5%-1.5% of 1,2-pentanediol by weight percentage.

[0037] In some embodiments of the present invention, the extracts in the sunscreen composition can be mixed and added together to the sunscreen cosmetic, or they can be added independently; or they can be added in the manner of adding the water extract to the aqueous phase and the alcohol extract to the oil phase.

[0038] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: This invention provides a novel sunscreen composition based on traditional Chinese medicinal plants, combining four plant extracts: Sophora japonica flower extract, Scutellaria baicalensis extract, marigold extract, and rosemary extract. Practical experience has shown that when these four extracts are combined in a specific mass ratio, they exhibit a remarkable synergistic effect in sun protection. At the same dosage, this combination of ingredients demonstrates a better synergistic effect in sun protection, enabling the achievement of sun protection with relatively low dosages and reducing or even avoiding the drawbacks of excessive dosage. Attached Figure Description

[0039] Figure 1 These are photos of the appearance of the sunscreen cosmetics obtained in Application Example 7 of the present invention, as well as Comparative Examples 1-8 and the blank control group. Figure 2 The absorbance test graphs are for the sunscreen cosmetics obtained in Application Example 7 of the present invention, as well as Comparative Examples 1-8 and the blank control group. Detailed Implementation

[0040] Existing research has at least partially confirmed that medicinal plants contain many active ingredients, such as anti-inflammatory and antioxidant properties. For example, Sophora japonica buds are rich in flavonoids, which are its main active ingredients, accounting for approximately 25%–35% of its dry weight. Rutin, quercetin, sennain, narcissin, kaempferol, and isorhamnetin are among its main flavonoid components, with rutin and quercetin accounting for 60%–70% of the total flavonoid content, making them the most abundant flavonoids in Sophora japonica buds. Furthermore, the content of sennain, narcissin, kaempferol, and isorhamnetin in Sophora japonica buds is lower than that of rutin and quercetin, with sennain and narcissin reaching up to 15.02 mg / g. -1 and 25.61 mg·g -1 From a chemical structure perspective, kaempferol is the C-7 deglycosylated product of kaempferol; isorhamnetin is the C-3 deglycosylated product of narcissin. When the temperature exceeds 160℃, kaempferol and narcissin rapidly degrade into kaempferol and isorhamnetin, respectively. Studies have found that these major flavonoids in Sophora japonica buds also possess good pharmacological activities and are the main components responsible for the antitumor, anti-inflammatory, anticancer, and hemostatic biological activities of Sophora japonica buds. In addition, Sophora japonica buds also contain various flavonoids such as genistein, isoquercitrin, hyperoside, and sennain. Scutellaria baicalensis is a perennial herb belonging to the genus Scutellaria in the family Lamiaceae. It is a traditional Chinese medicine, also known as Golden Tea, Mountain Tea Root, Rotten Heart Grass, and Scutellaria baicalensis Strips. It is a wild species unique to East Asia and was first recorded in the "Shennong's Classic of Materia Medica". Its dried root is the medicinal part. The most important medicinal active ingredient in Scutellaria baicalensis is flavonoids, which have a wide range of pharmacological activities. Currently, over 100 flavonoid aglycones and their glycosides, including baicalin, baicalein, wogonin, and baicalein, have been successfully isolated and identified from various Scutellaria baicalensis species. These compounds exhibit significant differences in chemical structure and biological activity. Among them, baicalin, baicalein, wogonin, and baicalein are particularly representative, constituting the four most pharmacologically significant flavonoid components in Scutellaria baicalensis. Their effects on anti-inflammation, anti-oxidation, anti-tumor, antiviral, and immunomodulatory properties have been extensively studied, providing an important chemical basis for the widespread application of Scutellaria baicalensis in traditional Chinese medicine. Marigolds are annual herbaceous plants belonging to the Asteraceae family and the Marigold genus. They are also known as honeycomb chrysanthemum, stinky hibiscus, and golden marigold. There are many varieties of marigolds, characterized by their vibrant colors, diverse flower shapes, strong adaptability, and long flowering period, making them highly valuable for both ornamental and practical purposes. Marigolds are cool in nature, bitter and slightly pungent in taste, and non-toxic. Their flowers, leaves, and roots can all be used medicinally, possessing properties such as clearing heat and detoxifying, resolving phlegm and relieving cough, and nourishing blood and regulating menstruation. They are used to treat dizziness, eye pain due to wind-heat, upper respiratory tract infections, whooping cough, conjunctivitis, stomatitis, toothache, pharyngitis, infantile convulsions, and amenorrhea. Marigolds are used to treat various ailments, including abdominal pain due to blood stasis, carbuncles, and boils. Traditional medicine abroad has long utilized different parts of the marigold to treat various diseases. Its leaves are used to treat hemorrhoids, muscle pain, wound swelling, and kidney disease; the flowers are used to treat fever, epilepsy, stomach pain, earache, scabies, liver disease, and eye diseases; the roots are used to make laxatives; and a decoction of the branches and leaves is used as an antimalarial and antipyretic. Traditionally, Kenyans also use it to repel mosquitoes, as it has a strong insecticidal effect. The medicinal value of marigolds is recognized in traditional medicine. Rosemary contains a variety of bioactive components, the main ones of which include phenolic acids (such as rosmarinic acid and carrageenan), diterpenoids (such as carrageenan), triterpenoids (such as oleanolic acid and ursolic acid), and flavonoids. These active components have different functions due to their different structural characteristics. Among them, phenolic acids usually have an ortho-dihydroxy structure, which can effectively scavenge free radicals and inhibit lipid oxidation; diterpenoids have strong lipid solubility, which makes them easy to intercalate into biological membranes and exert anti-inflammatory, antibacterial and mitochondrial protective effects; triterpenoids show unique physiological activities in immune regulation, cell proliferation and anti-tumor.

[0041] However, there is currently little research on its use in cosmetics, especially in sun protection. During the experimental research, the inventors of this invention unexpectedly confirmed that the combination of four plant extracts—Sophora japonica flower extract, Scutellaria baicalensis extract, Marigold extract, and Rosemary extract—in a specific ratio has an unexpected synergistic effect on sun protection. Based on this, the inventors of this invention propose a sun protection composition comprising Sophora japonica flower extract, Scutellaria baicalensis extract, Marigold extract, and Rosemary extract, wherein the mass ratio of Sophora japonica flower extract, Scutellaria baicalensis extract, Marigold extract, and Rosemary extract is 1:0.2-0.4:1.5-2.5:0.3-0.5.

[0042] The above-mentioned solution will be further described below with reference to specific embodiments; it should be understood that these embodiments are used to illustrate the basic principles, main features and advantages of the present invention, and the present invention is not limited to the scope of the following embodiments; the implementation conditions used in the embodiments can be further adjusted according to specific requirements, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0043] Unless otherwise specified in the following examples, all raw materials are commercially available or prepared by conventional methods in the art.

[0044] In the following examples, the Sophora japonica flower extract and the Sophora japonica flower extract solution were prepared by the following method: Sophora japonica flowers were washed and extracted with a 30% dipropylene glycol aqueous solution at 70°C for 3 hours at a material-to-liquid ratio of 1:20. The extract was then filtered through 15-20 μm pore size filter paper to obtain the Sophora japonica flower extract solution. The mass concentration of Sophora japonica flower extract in the solution was measured to be 1.68%. Scutellaria baicalensis extract and Scutellaria baicalensis extract solution were prepared by the following method: Scutellaria baicalensis was washed and extracted with a 30% dipropylene glycol aqueous solution at 70℃ for 3 hours at a material-to-liquid ratio of 1:20. The extract was then filtered through 15-20 μm pore size filter paper to obtain the Scutellaria baicalensis extract solution. The mass concentration of Scutellaria baicalensis extract in the extract solution was measured to be 1.59%. Marigold extract and marigold extract solution were prepared by the following method: Marigolds were washed and extracted with 95% ethanol at 60℃ for 3 hours at a material-to-liquid ratio of 1:20. The extract was then filtered through 15-20 μm pore size filter paper, rotary evaporated to a paste state, and then miscible with GTCC (caprylic / capric glyceride) to obtain the marigold extract solution. The mass concentration of marigold extract in the solution was measured to be 1.96%. Rosemary extract and rosemary extract solution were prepared by the following method: Rosemary was washed and extracted with a 30% dipropylene glycol aqueous solution at 70℃ for 3 hours at a material-to-liquid ratio of 1:20. The extract was then filtered through 15-20 μm pore size filter paper to obtain the rosemary extract solution. The mass concentration of rosemary extract in the solution was measured to be 2.02%. Green tea extract and green tea extract solution were prepared by the following method: Green tea leaves were washed and extracted with a 30% dipropylene glycol aqueous solution at 70℃ for 3 hours at a material-to-liquid ratio of 1:20. The extract was then filtered through 15-20 μm pore size filter paper to obtain a green tea extract solution. The mass concentration of green tea extract in the green tea extract solution was set to 2.02%. Astragalus extract and astragalus extract solution were prepared by the following method: Astragalus was washed and extracted with a 30% dipropylene glycol aqueous solution at 70℃ for 3 hours at a material-to-liquid ratio of 1:20. The extract was then filtered with 15-20 μm pore size filter paper to obtain astragalus extract solution. The mass concentration of astragalus extract in the astragalus extract solution was set to 1.59%.

[0045] Example 1: This example provides a sunscreen composition and its preparation method. The formulation of the sunscreen composition is shown in Table 1.

[0046] Table 1 The preparation method of this sunscreen composition includes: mixing and blending the ingredients listed in the table.

[0047] Example 2: This example provides a sunscreen composition and its preparation method. The formulation of the sunscreen composition is shown in Table 2.

[0048] Table 2 The preparation method of this sunscreen composition includes: mixing and blending the ingredients listed in the table.

[0049] Example 3: This example provides a sunscreen composition and its preparation method. The formulation of the sunscreen composition is shown in Table 3.

[0050] Table 3 The preparation method of this sunscreen composition includes: mixing and blending the ingredients listed in the table.

[0051] Comparative Examples 1-6: These examples provide a sunscreen composition and its preparation method, the formulation of which is shown in Table 4.

[0052] Table 4 The preparation method of this sunscreen composition is the same as in Example 1.

[0053] Comparative Example 7: These examples provide a sunscreen composition and its preparation method, the formulation of which is shown in Table 5.

[0054] Table 5 The preparation method of this sunscreen composition is the same as in Example 1.

[0055] Comparative Example 8: These examples provide a sunscreen composition and its preparation method, the formulation of which is shown in Table 6.

[0056] Table 6 The preparation method of this sunscreen composition is the same as in Example 1.

[0057] Application Examples 1-7: These examples provide a sunscreen cosmetic and its preparation method. The formula of the sunscreen cosmetic is shown in Table 7.

[0058] Table 7 The preparation method of this sunscreen cosmetic includes: After phase A is weighed out, phase B is added to phase A and stirred. Then phase C is added while stirring. After heating to 90°C, phase D is added while stirring. After cooling to room temperature, the aqueous phase is obtained. First, weigh out phase E and phase F separately. Heat phase F to 50°C to dissolve it, then cool it to room temperature. E phase and F phase were added to the aqueous phase and emulsified at room temperature and 6000 rpm. Then add other phases, mix well, and you will get the sunscreen cosmetic.

[0059] Application Comparative Example 1: This example provides a sunscreen cosmetic and its preparation method, which is basically the same as in Example 7, except that the sunscreen composition of Comparative Example 1 is used instead of the sunscreen composition of Example 1.

[0060] Application Comparative Example 2: This example provides a sunscreen cosmetic and its preparation method, which is basically the same as in Example 7, except that the sunscreen composition of Comparative Example 2 is used instead of the sunscreen composition of Example 1.

[0061] Application Comparative Example 3: This example provides a sunscreen cosmetic and its preparation method, which is basically the same as in Example 7, except that the sunscreen composition of Comparative Example 3 is used instead of the sunscreen composition of Example 1.

[0062] Application Comparative Example 4: This example provides a sunscreen cosmetic and its preparation method, which is basically the same as in Example 7, except that the sunscreen composition of Comparative Example 4 is used instead of the sunscreen composition of Example 1.

[0063] Application Comparative Example 5: This example provides a sunscreen cosmetic and its preparation method, which is basically the same as in Example 7, except that the sunscreen composition of Comparative Example 5 is used instead of the sunscreen composition of Example 1.

[0064] Application Comparative Example 6: This example provides a sunscreen cosmetic and its preparation method, which is basically the same as in Example 7, except that the sunscreen composition of Comparative Example 6 is used instead of the sunscreen composition of Example 1.

[0065] Application Comparative Example 7: This example provides a sunscreen cosmetic and its preparation method, which is basically the same as that in Example 7, except that the sunscreen composition of Comparative Example 7 is used instead of the sunscreen composition of Example 1.

[0066] Application Comparative Example 8: This example provides a sunscreen cosmetic and its preparation method, which is basically the same as in Example 7, except that the sunscreen composition of Comparative Example 8 is used instead of the sunscreen composition of Example 1.

[0067] See Figure 1 The image shows the appearance of the sunscreen products obtained in Application Example 7, Comparative Examples 1-8, and the blank control group. The viscosity of the sunscreen product obtained in the blank control group was measured using an LV4*6 rotor, and the result was 41500 mPa·s.

[0068] Performance testing: (1) Absorbance test The absorbance of the sunscreen cosmetics obtained from Application Example 7, Comparative Examples 1-8, and the blank control group was tested. 1. Test method: A 1.2 cm × 4.0 cm piece of medical tape (simulating the micropores of human skin) was attached to the transparent side of a clean quartz cuvette. The sunscreen cosmetic was accurately weighed (10.0 ± 0.2) mg. After wearing medical latex gloves and applying the product evenly, it was left to stand for 30 min. The absorbance in the range of 190 to 550 nm was measured. The arithmetic mean of the measured values ​​was calculated. The results were then used to comprehensively evaluate the sun protection effect in the UVA, UVB, UVC and blue light regions.

[0069] 2. Testing instrument: UV-1900 spectrophotometer.

[0070] 3. Test results are shown in Tables 8 and 9. Figure 2 As shown.

[0071] Table 8 Table 9 As shown in Tables 8-9, the average absorbance of Application Example 7 is the highest in both the UV and blue light regions, indicating the best synergistic effect on sun protection.

[0072] (2) In vitro SPF value test 1. Testing Methods 1) Mix the material at a concentration of 2 mg / cm³ 2 On the standard application value measurement plate, the total application amount was 32 ± 0.2 mg.

[0073] 2) The SPF value of sunscreen cosmetics was determined using a UV2000 UV protection index analyzer.

[0074] 2. Testing instrument: UV2000 UV protection index analyzer.

[0075] 3. The test results are shown in Tables 10, 11 and 12.

[0076] Table 10 Table 11 Table 12 It is evident that, with the same amount added, the effect of Example 7 is the best, indicating that the sunscreen composition prepared according to the formulation of Example 1 has the best synergistic effect on sun protection. At the same time, it can be seen that when the amount of the sunscreen composition of the present invention reaches 0.3%, the effectiveness of ultraviolet protection can be significantly increased.

[0077] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

[0078] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

Claims

1. A sunscreen composition, characterized in that, The sunscreen composition comprises Sophora japonica flower extract, Scutellaria baicalensis extract, Marigold extract and Rosemary extract, wherein the mass ratio of the Sophora japonica flower extract, the Scutellaria baicalensis extract, the Marigold extract and the Rosemary extract is 1:0.2-0.4:1.5-2.5:0.3-0.

5.

2. The sunscreen composition according to claim 1, characterized in that, The mass ratio of the Sophora japonica extract, the Scutellaria baicalensis extract, the marigold extract, and the rosemary extract is 1:0.25-0.35:1.7-2.2:0.35-0.

45.

3. The sunscreen composition according to claim 1, characterized in that, The Sophora japonica flower extract, the Scutellaria baicalensis extract, and the rosemary extract are each extracts obtained by solvent extraction of raw materials, wherein the raw materials are the corresponding Sophora japonica flower, Scutellaria baicalensis, or rosemary.

4. The sunscreen composition according to claim 3, characterized in that, The solvent is a diol ether or an aqueous solution thereof; further, the diol ether is R1CH2CH(R2)CH2-O-CH2CH(R3)CH2R4; Among them, R1, R2, R3, and R4 are independently selected from H and C. 1-3 Alkyl or hydroxyl, and two of R1, R2, R3, and R4 are selected from hydroxyl groups.

5. The sunscreen composition according to claim 4, characterized in that, R1 and R4 are independently selected from H and methyl, and R2 and R3 are both selected from hydroxyl groups; and / or, the solvent is an aqueous solution of diol ether, and further, the mass concentration of diol ether in the aqueous solution of diol ether is 10%-50%.

6. The sunscreen composition according to claim 3, characterized in that, The ratio of raw materials to solvent is controlled at 1:15-25; and / or the extraction temperature is controlled at 60-80℃; and / or the Sophora japonica extract, the Scutellaria baicalensis extract, and the rosemary extract are all added in the form of extract solutions.

7. The sunscreen composition according to claim 1, characterized in that, The marigold extract was obtained by extracting marigolds with a monohydric alcohol aqueous solution. Furthermore, the marigold extract is added in the form of a marigold extract solution, which is prepared by the following method: mixing marigold with a monohydric alcohol aqueous solution, extracting under heating conditions, filtering, evaporating to obtain a paste intermediate, dispersing the paste intermediate in oil to obtain a marigold extract solution. Furthermore, the heating conditions are controlled so that the extraction is carried out at a temperature of 50-70℃; Furthermore, the mass ratio of marigold to monohydric alcohol aqueous solution is controlled to be 1:15-25; Furthermore, the fats include caprylic / capric triglycerides; Furthermore, the monohydric alcohol in the aqueous monohydric alcohol solution includes ethanol.

8. A sunscreen cosmetic, wherein the sunscreen cosmetic comprises a sunscreen agent, characterized in that, The sunscreen agent comprises the sunscreen composition according to any one of claims 1-7.

9. The sunscreen cosmetic according to claim 8, characterized in that, In terms of mass percentage, the sunscreen composition accounts for 0.1%-10% of the sunscreen cosmetic, and more specifically 0.3%-5%.

10. The sunscreen cosmetic according to claim 8, characterized in that, By weight percentage, the sunscreen cosmetic comprises: 5%-15% moisturizer, 0.5%-4% skin feel modifier, 0.1%-0.6% ammonium acryloyl dimethyl taurate / VP copolymer, 0.05%-0.30% polyacrylate crosspolymer-6, 0.02%-0.25% hydroxypropyl methylcellulose stearyl ether, 0.1%-10% of the sunscreen composition, 1%-30% base sunscreen agent, 0.1%-10% emollient, and 40%-65% water.

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