Sunscreen foundation and method of making the same

Abstract

The present application provides a sunscreen foundation liquid and a preparation method thereof. The sunscreen foundation liquid comprises the following components in parts by weight: 2 parts of filler powder vinyl dimethicone / methicone silsesquioxane crosspolymer; and, based on 2 parts of the filler powder vinyl dimethicone / methicone silsesquioxane crosspolymer, 0.2-1 parts of physical sunscreen powder; 2-6 parts of a chemical sunscreen composition; 5-15 parts of a biological sunscreen composition; the biological sunscreen composition comprises extracts from mixed fermentation of white bark dogwood, high mountain fireweed and dunaliella salina; and 22-47 parts of other ingredients. The sunscreen foundation liquid has a sunscreen effect, is easy to apply, and is mild to the skin.

Description

Technical Field

[0001] This application belongs to the field of cosmetic technology, specifically relating to a sunscreen foundation and its preparation method. Background Technology

[0002] With increasing health awareness, consumers' demand for sun protection is no longer limited to traditional sunscreens, but has gradually expanded to more everyday cosmetics, such as foundation. Sun protection is no longer just a summer necessity, but a year-round concern, further driving market demand for sunscreen foundation. Sunscreen foundation is a cosmetic product that adds sunscreen agents to a foundation base. It can beautify the skin while providing a protective barrier, effectively blocking or absorbing ultraviolet rays and reducing their damage to the skin.

[0003] Common sunscreens can be categorized into physical and chemical sunscreens based on their ingredients. Physical sunscreens, such as nano titanium dioxide and nano zinc oxide, primarily work by reflecting and scattering ultraviolet (UV) rays. However, physical sunscreens are typically thicker, harder to apply evenly, have poor breathability, and are difficult to rinse off with water, requiring makeup remover for thorough removal. Chemical sunscreens work by absorbing UV rays, but their protection is limited, requiring frequent reapplication for long-lasting protection. Some chemical sunscreen ingredients may irritate the skin or trigger allergic reactions. Summary of the Invention

[0004] This application provides a sunscreen foundation and its preparation method, which aims to improve the sun protection effect of the sunscreen foundation while being easy to apply and gentle on the skin.

[0005] The first aspect of this application provides a sunscreen foundation liquid, which comprises the following components in parts by weight:

[0006] Two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer; and two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, respectively.

[0007] Physical sunscreen powder, 0.2–1 part; chemical sunscreen composition, 2–6 parts;

[0008] Biological sunscreen composition, 5-15 parts; the biological sunscreen composition includes an extract of white peony, alpine edelweiss and Haematococcus pluvialis fermented together; other ingredients, 22-47 parts.

[0009] In a feasible embodiment of the first aspect of this application, the biological sunscreen composition includes an extract of a mixture of fermented white peony, edelweiss and haematococcus pluvialis in a mass ratio of 1:(0.6-15):(1-20), with an optional mass ratio of 1:(2-12):(2-8).

[0010] In a feasible embodiment of the first aspect of this application, the mass ratio of physical sunscreen powder, chemical sunscreen composition and biological sunscreen composition in the sunscreen foundation is 1:(7.5-17):(20-50).

[0011] In a feasible embodiment of the first aspect of this application, the sum of the mass of the physical sunscreen powder, the chemical sunscreen composition, and the biological sunscreen composition accounts for 5% to 18% of the total mass of the sunscreen foundation.

[0012] In a feasible embodiment of the first aspect of this application, the bio-sunscreen composition accounts for 5% to 12% of the mass percentage of the sunscreen foundation.

[0013] In a feasible embodiment of the first aspect of this application, the mass ratio of the filler powder vinyl polydimethylsiloxane / polymethylsiloxane sesquioxane crosslinked polymer to the total mass of the physical sunscreen powder, the chemical sunscreen composition, and the biological sunscreen composition is 1:(4.5 to 8.7).

[0014] In a feasible embodiment of the first aspect of this application, the sunscreen foundation liquid satisfies at least one of the following conditions:

[0015] a. Physical sunscreen powders include one or more of nano-titanium dioxide and zinc oxide;

[0016] b. The chemical sunscreen composition includes one or more of the following: ethylhexyl methoxycinnamate, ethylhexyl diethylamino hydroxybenzoyl benzoate, ethylhexyl salicylate, bis-ethylhexyloxyphenol methoxyphenyl triazine, and phenylbenzimidazole sulfonic acid;

[0017] c. Other ingredients include one or more of the following: emulsifiers, oils, film-forming agents, polyols, colorants, and preservatives.

[0018] In a feasible embodiment of the first aspect of this application, the sunscreen foundation comprises the following components in parts by weight:

[0019] Two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer; and two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, respectively.

[0020] Physical sunscreen powder, 0.2–0.4 parts; chemical sunscreen composition, 3–5 parts; biological sunscreen composition, 8–12 parts; the biological sunscreen composition includes extracts of a mixture of fermented white peony, edelweiss and Haematococcus pluvialis; other ingredients, 24–43 parts.

[0021] In a feasible embodiment of the first aspect of this application, the sunscreen foundation comprises the following components in parts by weight:

[0022] Two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer; and two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, respectively.

[0023] Physical sunscreen powder, 0.2-1 part; chemical sunscreen composition, 2-6 parts; biological sunscreen composition, 5-15 parts; the biological sunscreen composition includes extracts of mixed fermentation of Cynanchum paniculatum, Edelweiss and Haematococcus pluvialis; emulsifier, 1-6 parts; oil, 15-25 parts; film-forming agent, 3-8 parts; polyol, 3-8 parts.

[0024] In a feasible embodiment of the first aspect of this application, the sunscreen foundation liquid satisfies at least one of the following conditions:

[0025] d. The emulsifier includes one or more of polyglycerol-3 diisostearate, PEG-30 dihydroxystearate, and lauryl PEG-9 polydimethylsiloxane;

[0026] e. Fats and oils include one or more of dioctyl carbonate, diisopropyl sebacate, and isododecane;

[0027] f. Film-forming agents include one or a combination of trimethylsilyloxysilicate and polymethylsilsesquioxane;

[0028] g. Polyols include one or more of glycerol, 1,2-pentanediol and 1,2-hexanediol;

[0029] h. The colorant includes one or more of CI 77891, CI 77499, CI 77492 and CI 77491;

[0030] i. Preservatives include one or more of phenoxyethanol, p-hydroxyacetophenone, octyl glycol and ethylhexylglycerin.

[0031] A second aspect of this application provides a method for preparing a sunscreen foundation, comprising:

[0032] Mix the filler powder vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, physical sunscreen powder, chemical sunscreen composition and other ingredients, add the biological sunscreen composition, stir and homogenize to obtain a sunscreen foundation.

[0033] In a feasible embodiment of the second aspect of this application, the preparation of the bio-sunscreen composition includes:

[0034] The herbs *Cynanchum paniculatum*, *Leontopodium alpineum*, and *Haematococcus pluvialis* were dried and pulverized to obtain a powder mixture of the herbs.

[0035] Bifidobacterium animalis subsp. lactis was dissolved in Sabouraud dextrose liquid medium to obtain a bacterial suspension; the bacterial suspension was inoculated into a culture medium for activation to obtain lactic acid bacteria fermentation seed culture.

[0036] Rhodotorula glutinis was dissolved in Sabouraud dextrose liquid medium to obtain a bacterial suspension; the bacterial suspension was inoculated into a culture medium for activation to obtain yeast fermentation seed culture.

[0037] A mixture of powdered white peony, alpine edelweiss, and haematococcus pluvialis was placed in a fermenter, and lactic acid bacteria fermentation seed culture and enzyme powder (a compound enzyme powder of cellulase and pectinase) were added to fermentation to obtain the first fermentation liquid.

[0038] Yeast seed culture is introduced into the first fermentation broth for fermentation to obtain a second fermentation broth; the second fermentation broth is then post-treated to obtain a biological sunscreen composition.

[0039] This sunscreen foundation includes a filler powder of vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane cross-linked polymer, and sunscreen active ingredients in combination with physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition. The biological sunscreen composition includes an extract from a mixture of fermented white peony root, edelweiss, and Haematococcus pluvialis. The inventors discovered that, compared to ordinary non-fermented plant extracts, such as those obtained by soaking in water, this application, through fermentation, can open the cell walls of white peony root, edelweiss, and Haematococcus pluvialis, releasing more active substances. This results in a low-viscosity, low-molecular-weight fermented extract of the mixture, for example, with a viscosity of 40 cP.s to 50 cP.s. This extract is more active and gentler, better promoting the connection and synergistic effect between different sunscreen mechanisms, blocking the free radical chain reaction caused by ultraviolet rays, indirectly enhancing the skin's resistance to ultraviolet rays, and promoting a comprehensive upgrade in sunscreen efficacy. It can block UVA / UVB across the entire spectrum, and is environmentally friendly, biocompatible, and gentle and non-irritating.

[0040] Furthermore, this application uses physical sunscreen powders and chemical sunscreen compositions in combination with the aforementioned biological sunscreen agents to improve the problem of reduced sun protection effect after makeup application, requiring multiple touch-ups, and comprehensively enhance the sun protection effect.

[0041] Furthermore, this sunscreen foundation, while possessing high sun protection efficacy, is still easy to apply, effectively conceals pores, and provides a natural and long-lasting makeup look, making it a sunscreen foundation with excellent overall performance. Attached Figure Description

[0042] Figure 1 This is a graph showing the UV absorption capacity test of the biological sunscreen composition in Example 2;

[0043] Figure 2These are application diagrams of samples of biological sunscreen compositions with different mass percentages.

[0044] Figure 3 This is a graph showing the test results of subject 1's ultraviolet absorption capacity.

[0045] Figure 4 This is a graph showing the test results of subject 2's ultraviolet absorption capacity.

[0046] Figure 5 This is a graph showing the test results of subject 3's ultraviolet absorption capacity test;

[0047] Figure 6 This is a diagram illustrating the biological sunscreen composition of Example 1. Detailed Implementation

[0048] To make the inventive objectives, technical solutions, and beneficial technical effects of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the embodiments described in this specification are merely illustrative and not intended to limit the scope of this application.

[0049] For simplicity, this paper only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form an undefined range; and any lower limit can be combined with other lower limits to form an undefined range, just as any upper limit can be combined with any other upper limit to form an undefined range. Furthermore, although not explicitly stated, every point or individual value between the endpoints of a range is included within that range. Therefore, each point or individual value can serve as its own lower or upper limit and be combined with any other point or individual value, or with other lower or upper limits, to form an undefined range.

[0050] In the description herein, when a composition is described as containing, comprising, or including a specific component, or when a process is described as containing, comprising, or including a specific process step, it is anticipated that the composition of this application is also primarily composed of or consisting of the said component, and that the process of this application is also primarily composed of or consisting of the said process step.

[0051] Unless otherwise expressly stated, the use of the terms “including,” “contains,” “comprising,” “containing,” and “having” should generally be interpreted as open-ended and non-restrictive.

[0052] In this description, it should be noted that, unless otherwise stated, "above" and "below" include the stated number, and "multiple" in "one or more" means two or more.

[0053] The foregoing description of this invention is not intended to describe every disclosed embodiment or implementation. Instead, the following description provides more specific examples of exemplary embodiments. Throughout the application, guidance is provided through a series of embodiments that can be used in various combinations. The examples listed are merely representative and should not be construed as exhaustive.

[0054] Ethylhexyl methoxycinnamate and nano-titanium dioxide are common sunscreen ingredients. However, ethylhexyl methoxycinnamate has limited sun protection and is prone to causing skin sensitivity, redness, stinging, and itching. Its dosage must be strictly controlled. Some sunscreens improve photostability by adding stabilizers or antioxidants, but as part of a foundation, its sun protection effect after makeup application is difficult to assess, and due to the large number of added chemicals, its safety is questionable.

[0055] In view of this, after extensive experimental research and demonstration, the inventors have provided a sunscreen foundation and its preparation method in this application, which aims to improve the sun protection effect of the sunscreen foundation while being gentle and non-irritating.

[0056] Bio-sunscreens are ingredients obtained through biological methods that offer some protection against ultraviolet (UV) radiation. They primarily protect the skin from UV damage indirectly. Specifically, bio-sunscreens do not directly absorb or reflect UV rays; instead, they reduce UV damage to the skin through other mechanisms. Bio-sunscreens are typically derived from plant extracts, bio-fermentation products, or bioengineering technologies. As consumers increasingly demand higher standards for sunscreen products, prioritizing safety and effectiveness, the development of a bio-sunscreen foundation is a market necessity.

[0057] The foundation in this application, through the addition of biological sunscreens, physical sunscreens, and chemical sunscreens, can not only absorb ultraviolet rays in the 200-400nm range and effectively alleviate problems such as sunburn and sun damage, but also the addition of biological sunscreens can effectively reduce the skin irritation caused by physical and chemical sunscreens in the formula.

[0058] The first aspect of this application provides a sunscreen foundation liquid, which comprises the following components in parts by weight:

[0059] Two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer; and two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, respectively.

[0060] Physical sunscreen powder, 0.2-1 part; chemical sunscreen composition, 2-6 parts; biological sunscreen composition, 5-15 parts; the biological sunscreen composition includes extracts of a mixture of fermented white peony, edelweiss and Haematococcus pluvialis; other ingredients, 22-47 parts.

[0061] This sunscreen foundation includes a filler powder of vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane cross-linked polymer, and sunscreen active ingredients in combination with physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition. The biological sunscreen composition includes an extract from a mixture of fermented white peony root, edelweiss, and Haematococcus pluvialis. The inventors discovered that, compared to ordinary non-fermented plant extracts, such as those obtained by soaking in water, this application, through fermentation, can open the cell walls of white peony root, edelweiss, and Haematococcus pluvialis, releasing more active substances. This results in a low-viscosity, low-molecular-weight fermented extract of the mixture, for example, with a viscosity of 40 cP.s to 50 cP.s. This extract is more active and gentler, better promoting the connection and synergistic effect between different sunscreen mechanisms, blocking the free radical chain reaction caused by ultraviolet rays, indirectly enhancing the skin's resistance to ultraviolet rays, and promoting a comprehensive upgrade in sunscreen efficacy. It can block UVA / UVB across the entire spectrum, and is environmentally friendly, biocompatible, and gentle and non-irritating.

[0062] Furthermore, this application uses physical sunscreen powders and chemical sunscreen compositions in combination with the aforementioned biological sunscreen agents to improve the problem of reduced sun protection effect after makeup application, requiring multiple touch-ups, and comprehensively enhance the sun protection effect.

[0063] Furthermore, this sunscreen foundation, while possessing high sun protection efficacy, is still easy to apply, effectively conceals pores, and provides a natural and long-lasting makeup look, making it a sunscreen foundation with excellent overall performance.

[0064] The extract of Cynanchum atratum mainly contains polysaccharides, flavonoids, saponins, alkaloids and other components, and has good antioxidant, antibacterial and anti-inflammatory effects (see: Yang Feifei, Isolation, Purification, Structural Analysis and Bioactivity Study of Cynanchum atratum Polysaccharides [D], Shanghai University of Traditional Chinese Medicine).

[0065] Leontopodium alpinum extract contains a variety of chemical components. To date, compounds isolated and obtained from it include flavonoids, volatile oils, sesquiterpenes, phenylpropanoids, and steroids. These compounds together constitute the rich pharmacological effects of leontopodium alpinum, such as anti-inflammatory, antioxidant, skin-soothing, and treatment of various kidney diseases. Leontopodium alpinum also has a strong inhibitory effect on Staphylococcus aureus (see: Wu Yanwen, Research progress on chemical components and pharmacological activities of plants in the genus Leontopodium [J], China Journal of Traditional Chinese Medicine).

[0066] Haematococcus pluvialis is high in astaxanthin, which has strong antioxidant capabilities, can scavenge free radicals, and delay aging. Literature indicates that ultraviolet radiation intensity affects the astaxanthin content in Haematococcus pluvialis; appropriately increasing ultraviolet radiation intensity can promote its synthesis, suggesting that Haematococcus pluvialis has good UV protection capabilities.

[0067] In some embodiments, the mass ratio of physical sunscreen powder, chemical sunscreen composition and biological sunscreen composition in the sunscreen foundation is 1:(7.5-17):(20-50).

[0068] The inventors discovered that by further adjusting the mass ratio of physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition within the above-mentioned range, the solid sunscreen powder particles and liquid sunscreen powder can be mixed more evenly, resulting in a suitable viscosity that is easy to apply. Furthermore, the mixture can form a fine and uniform sunscreen coating during application, enhancing the sunscreen effect while maintaining high safety.

[0069] In some embodiments, the bio-sunscreen composition includes an extract of *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* fermented in a mass ratio of 1:(0.6–15):(1–20), optionally in a mass ratio of 1:(2–12):(2–8). The *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* fermented in a mass ratio of 1:(0.6–15):(1–20) refers to the raw materials used in preparing the extract, in which the mass ratio of *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* is 1:(0.6–15):(1–20). Optionally, the raw materials used in preparing the extract are 1:(2–12):(2–8).

[0070] When the mass ratio of *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* in the biological sunscreen composition is within the above-mentioned range, it can better remove or reduce intermediate products of oxygen-active groups, block free radical chain reactions caused by ultraviolet rays, slow down tissue damage, enhance the activity of skin cells, regulate skin immune function, and indirectly improve the skin's resistance to ultraviolet rays. The synergistic effect with physical sunscreen powder, chemical sunscreen composition, and filler powder vinyl polydimethylsiloxane / polymethylsiloxane sesquioxane cross-linked polymer is better.

[0071] Through experimental research, the inventors discovered that when the mass percentage of sunscreen active ingredients or biological sunscreen compositions in sunscreen foundation is controlled within a certain range, it helps to improve the sunscreen effect.

[0072] In some embodiments, the sum of the masses of physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition accounts for 5% to 18% of the total mass of the sunscreen foundation.

[0073] In some embodiments, the bio-sunscreen composition constitutes 5% to 12% of the mass of the sunscreen foundation.

[0074] In addition to achieving good sun protection performance, other formulations were carefully formulated to optimize the visual effect on the skin and the long-lasting makeup effect. In some embodiments, the mass ratio of the filler powder vinyl polydimethylsiloxane / polymethylsiloxane sesquioxane crosspolymer to the total mass of the physical sunscreen powder, chemical sunscreen composition and biological sunscreen composition is 1:(4.5 to 8.7).

[0075] Not intending to be limited by any theory or explanation, the inventors discovered that when the mass ratio of the filler powder vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer to the total mass of physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition is controlled within the above-mentioned range, not only is the sun protection efficacy improved, but also the sunscreen coating forms in a shorter time, has better water resistance, and can effectively fill in minor imperfections on the skin surface, such as enlarged pores, making them visually concealed. It can also greatly enhance the durability and stability of the makeup, ensuring a fresh and natural makeup look all day long.

[0076] The inventors discovered that, through the aforementioned further customized combinations, the foundation of this application not only meets the practical need for high-efficiency sun protection, but also takes into account the cosmetic effect of concealing pores and maintaining the integrity and longevity of makeup.

[0077] In some embodiments, the physical sunscreen powder in the sunscreen foundation includes one or more of nano-titanium dioxide and zinc oxide.

[0078] In some embodiments, the chemical sunscreen composition in the sunscreen foundation includes one or more of ethylhexyl methoxycinnamate, diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl salicylate, bis-ethylhexyloxyphenol methoxyphenyl triazine, and phenylbenzimidazole sulfonic acid.

[0079] In some embodiments, other ingredients in the sunscreen foundation include one or more of emulsifiers, oils, film-forming agents, polyols, colorants, and preservatives.

[0080] In some embodiments, the sunscreen foundation comprises the following components in parts by weight:

[0081] Two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer; and two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, respectively.

[0082] Physical sunscreen powder, 0.2-0.4 parts; chemical sunscreen composition, 3-5 parts; biological sunscreen composition, 8-12 parts; the biological sunscreen composition includes an extract of a mixture of fermented white peony, edelweiss and Haematococcus pluvialis.

[0083] Other ingredients, 24-43 parts.

[0084] In some embodiments, the sunscreen foundation comprises the following components in parts by weight:

[0085] Two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer; and two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, respectively.

[0086] Physical sunscreen powder, 0.2-1 part; chemical sunscreen composition, 2-6 parts; biological sunscreen composition, 5-15 parts; the biological sunscreen composition includes extracts of mixed fermentation of Cynanchum paniculatum, Edelweiss and Haematococcus pluvialis; emulsifier, 1-6 parts; oil, 15-25 parts; film-forming agent, 3-8 parts; polyol, 3-8 parts.

[0087] In some embodiments, the sunscreen foundation comprises the following components in parts by weight:

[0088] Two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer; and two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, respectively.

[0089] Physical sunscreen powder, 0.2-0.4 parts; chemical sunscreen composition, 3-5 parts; biological sunscreen composition, 8-12 parts; the biological sunscreen composition includes extracts of mixed fermentation of Cynanchum paniculatum, Edelweiss and Haematococcus pluvialis; emulsifier, 1-6 parts; oil, 15-25 parts; film-forming agent, 3-8 parts; polyol, 3-8 parts.

[0090] In some embodiments, the emulsifier in the sunscreen foundation includes one or more of polyglycerol-3 diisostearate, PEG-30 dihydroxystearate, and lauryl PEG-9 polydimethylsiloxane.

[0091] In some embodiments, the oils in the sunscreen foundation include one or more of dioctyl carbonate, diisopropyl sebacate, and isododecane.

[0092] In some embodiments, the film-forming agent in the sunscreen foundation includes one or a combination of trimethylsiloxysilicate and polymethylsilsesquioxane.

[0093] In some embodiments, the polyols in the sunscreen foundation include one or more of glycerin, 1,2-pentanediol, and 1,2-hexanediol.

[0094] In some embodiments, the colorant in the sunscreen foundation includes one or more of CI 77891, CI 77499, CI 77492 and CI 77491.

[0095] In some embodiments, the preservatives in the sunscreen foundation include one or more of phenoxyethanol, p-hydroxyacetophenone, caprylyl glycol, and ethylhexylglycerin.

[0096] The second aspect of this application provides a method for preparing a sunscreen foundation, comprising:

[0097] Mix the filler powder vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, physical sunscreen powder, chemical sunscreen composition and other ingredients, add the biological sunscreen composition, stir and homogenize to obtain a sunscreen foundation.

[0098] In some embodiments, the method for preparing sunscreen foundation includes:

[0099] Raw materials provided: Phase A: emulsifiers, oils, physical sunscreen powders, chemical sunscreen compositions, and film-forming agents; Phase B includes powders such as coloring powders; Phase C includes polyols and preservatives, with phenoxyethanol as an optional preservative, added at 0.8% of the total mass of the sunscreen foundation; Phase D includes a biological sunscreen composition: a mixed fermented extract of Cynanchum paniculatum, Edelweiss, and Haematococcus pluvialis.

[0100] Add phase A and phase B together into an emulsifying pot, mix evenly, heat to 85°C, and stir homogenize at 5000 rpm for 7 minutes to obtain the first mixture.

[0101] Add phase C to the emulsification pot and mix it evenly with the first mixture. Stir at 5000 rpm for 5 minutes to homogenize. Cool down to 50°C. Cool the material to room temperature and add phase D. Stir at 500 rpm for 5 minutes to homogenize. Degas under vacuum and discharge at room temperature to obtain sunscreen foundation.

[0102] In some embodiments, the preparation of the bio-sunscreen composition includes:

[0103] The herbs *Cynanchum paniculatum*, *Leontopodium alpineum*, and *Haematococcus pluvialis* were dried and pulverized to obtain a powder mixture of the herbs.

[0104] Bifidobacterium animalis subsp. lactis was dissolved in Sabouraud dextrose liquid medium to obtain a bacterial suspension; the bacterial suspension was inoculated into a culture medium for activation to obtain lactic acid bacteria fermentation seed culture.

[0105] Rhodotorula glutinis was dissolved in Sabouraud dextrose liquid medium to obtain a bacterial suspension; the bacterial suspension was inoculated into a culture medium for activation to obtain yeast fermentation seed culture.

[0106] A mixture of powdered white peony, alpine edelweiss, and haematococcus pluvialis was placed in a fermentation tank, and lactic acid bacteria fermentation seed culture and enzyme powder (a composite enzyme powder of cellulase and pectinase) were added to fermentation to obtain the first fermentation liquid.

[0107] Yeast seed culture is introduced into the first fermentation broth for fermentation to obtain a second fermentation broth; the second fermentation broth is then post-treated to obtain a biological sunscreen composition.

[0108] In some embodiments, the step of drying and pulverizing *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* to obtain a mixture powder of *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* includes placing *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* at 100°C for 30 minutes to dry, pulverizing at 500 rpm for 6 minutes in a pulverizer, and passing through a 200-mesh sieve to remove large particles to obtain a mixture powder of *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis*.

[0109] In some embodiments, the steps of separately dissolving lactic acid bacteria and yeast in Sabouraud dextrose liquid medium to obtain bacterial suspensions, and then inoculating the bacterial suspensions into the culture medium for activation to obtain lactic acid bacteria fermentation seed culture and yeast fermentation seed culture, include the following steps: dissolving lactic acid bacteria in Sabouraud dextrose liquid medium, stirring at 250 rpm for 10-15 h at 37°C to obtain a bacterial suspension with an absorbance of 0.8-1.5 at a wavelength of 600 nm, inoculating the bacterial suspension again into the culture medium at an inoculation amount of 1% by mass, culturing according to the above culture method for a total of 2 times, activating the bacteria, and using the second generation bacterial suspension as the lactic acid bacteria fermentation seed culture.

[0110] In some embodiments, in the steps of separately dissolving lactic acid bacteria and yeast in Sabouraud dextrose liquid medium to obtain bacterial suspensions; inoculating the bacterial suspensions into the culture medium for activation to obtain lactic acid bacteria fermentation seed culture and yeast fermentation seed culture, the preparation of yeast fermentation seed culture includes dissolving yeast in Sabouraud dextrose liquid medium, stirring at 250 rpm at 28°C for 10-15 h to obtain a bacterial suspension with an absorbance of 0.8-1.5 at a wavelength of 600 nm, inoculating the bacterial suspension again into the culture medium at an inoculation amount of 1% by mass, culturing according to the above culture method for a total of 2 times, activating the cells, and using the second generation bacterial suspension as yeast fermentation seed culture.

[0111] In some embodiments, the step of placing a mixture of powdered *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* in a fermenter, inoculating with lactic acid bacteria fermentation seed culture and enzyme powder, and fermenting to obtain a first fermentation broth includes: adding the mixture of powdered *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* into a 5L fermenter; controlling the mass ratio of the mixture of powdered *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* to water at 1:10; sterilizing at 121°C for 15 minutes; cooling to room temperature; inoculating with 1-2% lactic acid bacteria fermentation seed culture and 0.5-1% enzyme powder (a composite enzyme powder of cellulase and pectinase at a mass ratio of 1:2); stirring at 37°C and 250 rpm for 24-48 hours; adding 1-2 drops of defoaming agent; and monitoring pH, dissolved oxygen, and viscosity changes during the fermentation process to obtain the first fermentation broth.

[0112] In some embodiments, yeast seed culture is inoculated into the first fermentation broth for fermentation to obtain a second fermentation broth; the second fermentation broth is then post-treated to obtain a bio-sunscreen composition. The preparation of the second fermentation broth includes inoculating the first fermentation broth with 1-2% yeast seed culture at an inoculation rate, simultaneously adding 1L of SDB medium, stirring at 250rpm for 24 hours at 28°C, and maintaining an oxygenation rate of 0.1-0.5m³ / h. 3 Add 1-2 drops of defoamer, and monitor pH, dissolved oxygen, and viscosity changes during fermentation to obtain a second fermentation broth; then post-process the second fermentation broth to obtain a biological sunscreen composition.

[0113] In some embodiments, during the preparation of the bio-sunscreen composition, yeast seed culture is introduced into the first fermentation broth for fermentation to obtain a second fermentation broth; the second fermentation broth is then post-treated to obtain the bio-sunscreen composition. The post-treatment of the second fermentation broth includes: filtration using 5C filter paper to remove filter residue and remove bacterial cells and fine particulate matter at 0.2 μm; pH adjustment using sodium hydroxide (1 mol / L) to adjust the pH of the filtrate to 6-7; decolorization and deodorization by adding 1 wt%–2 wt% activated carbon (based on the total mass of the filtrate) and stirring at 100 rpm for 10-20 min to remove the sour taste and the plant's natural color after fermentation, resulting in a colorless and odorless plant fermentation broth; and measuring conductivity and shading rate to control batch-to-batch stability of the product.

[0114] Example

[0115] The following embodiments describe the disclosure of this application in more detail. These embodiments are merely illustrative, as various modifications and variations will be apparent to those skilled in the art within the scope of the disclosure of this application. Unless otherwise stated, all parts, percentages, and ratios reported in the following embodiments are based on weight, and all reagents used in the embodiments are commercially available or synthesized by conventional methods and can be used directly without further processing, and the instruments used in the embodiments are commercially available.

[0116] Strain information: Bifidobacterium animalis subsp. lactis and Rhodotorula glutinis were purchased from Shanghai Zhizhen Zhichen Technology Co., Ltd.; Lactic acid bacteria and Galactomyces were purchased from Shanghai Fuxiang Biotechnology Co., Ltd.

[0117] Biological sunscreen composition

[0118] Example 1

[0119] Preparation of biological sunscreen composition:

[0120] Baiwei, Alpine Edelweiss, and Haematococcus pluvialis were dried at 100℃ for 30 minutes, pulverized at 500 rpm for 6 minutes, and passed through a 200-mesh sieve to remove large particles, so as to obtain a mixture powder of Baiwei, Alpine Edelweiss, and Haematococcus pluvialis; the mass ratio of Baiwei, Alpine Edelweiss, and Haematococcus pluvialis was 1:7:5.

[0121] Bifidobacterium animalis subsp. lactis was dissolved in Sabouraud dextrose liquid medium and stirred at 250 rpm for 12 h at 37 °C to obtain a bacterial suspension with an absorbance of 1.0 at 600 nm. The bacterial suspension was then inoculated into the medium again at a mass percentage of 1% and cultured twice according to the above culture method to activate the bacteria. The second generation bacterial suspension was used as the seed culture for lactic acid bacteria fermentation.

[0122] Dissolve Rhodotorula glutinis in Sabouraud dextrose liquid medium and stir at 250 rpm for 12 h at 28 °C to obtain a bacterial suspension with an absorbance of 1.0 at 600 nm. Inoculate the bacterial suspension again into the medium at a mass percentage of 1% and culture it according to the above culture method for a total of 2 times to activate the cells. Use the second generation bacterial suspension as the yeast fermentation seed.

[0123] A mixture of powdered *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* was added to a 5L fermenter. The mass ratio of the plant powder to water was controlled at 1:10. The mixture was sterilized at 121℃ for 15 minutes, cooled, and placed at room temperature. Lactic acid bacteria fermentation seed culture was inoculated at 1.5% of the total mass of plant powder and water, along with 0.5% enzyme powder (a composite enzyme powder of cellulase and pectinase in a mass ratio of 1:2). The mixture was stirred at 37℃ and 250 rpm for 32 hours. One drop of defoamer was added. The pH, dissolved oxygen, and viscosity changes were monitored during the fermentation process to obtain the first fermentation broth.

[0124] Yeast seed culture was inoculated into the first fermentation broth at an inoculum rate of 1.5%, along with 1 liter of LSDB medium. The mixture was stirred at 250 rpm for 24 hours at 28°C with an oxygenation rate of 0.2 mg / L. 3 Add 1 drop of defoamer, and monitor pH, dissolved oxygen, and viscosity changes during the fermentation process to obtain the second fermentation broth;

[0125] The second fermentation broth underwent post-treatment including: filtration, using 5C filter paper to remove filter residue and 0.2µm of bacterial cells and fine particles; pH adjustment, using sodium hydroxide (1mol / L) to adjust the pH of the filtrate to 6-7; decolorization and deodorization, adding 1wt% activated carbon of the total filtrate mass and stirring at 100rpm for 11min to remove the sour taste and plant color from the fermentation process, resulting in a colorless and odorless plant fermentation broth; and measuring conductivity and shading rate to control batch-to-batch stability of the product to obtain the biological sunscreen composition.

[0126] Preparing a sunscreen foundation:

[0127] The above-prepared biological sunscreen composition is further used to prepare a sunscreen foundation, which comprises the following components in parts by weight:

[0128] The following components are included: 2 parts of a vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer filler; 0.4 parts of physical sunscreen powder (including 0.2 parts each of nano titanium dioxide and zinc oxide); 3 parts of a chemical sunscreen composition (including 1 part each of ethylhexyl salicylate, bis-ethylhexyloxyphenol methoxyphenyl triazine, and phenylbenzimidazole sulfonic acid); 8 parts of a biological sunscreen composition; 8 parts by weight of trimethylsiloxysilicate as a film-forming agent; 3 parts by weight of glycerin as a polyol; 15 parts by weight of dioctyl carbonate, diisopropyl sebacate, and isododecane as oils, in a ratio of 1:1:1; 2 parts by weight of lauryl PEG-9 polydimethylsiloxane ethyl polydimethylsiloxane, PEG-30 dihydroxystearate, and polyglycerol-3 diisostearate, in a ratio of 2:1:1; and water to make up to 100 parts.

[0129] The mass ratio of physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition in the sunscreen foundation is 1:7.5:20, and the mass ratio of the filler powder vinyl polydimethylsiloxane / polymethylsiloxane sesquioxane crosslinked polymer to the total mass of physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition is 1:5.7.

[0130] Example 2

[0131] The only difference between Example 2 and Example 1 is that, in the step of preparing the biological sunscreen composition, the mass ratio of *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* is 1:2:8.

[0132] Example 3

[0133] The only difference between Example 3 and Example 1 is that, in the step of preparing the biological sunscreen composition, the mass ratio of *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* is 1:12:2.

[0134] Example 4

[0135] The only difference between Example 4 and Example 1 is that, in the step of preparing the biological sunscreen composition, the mass ratio of *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* is 1:0.6:1.

[0136] Example 5

[0137] The only difference between Example 5 and Example 1 is that, in the step of preparing the biological sunscreen composition, the mass ratio of *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* is 1:15:20.

[0138] Example 6

[0139] Example 6 differs from Example 1 only in that the sunscreen foundation contains 0.2 parts of physical sunscreen powder (0.05 parts of nano titanium dioxide and 0.15 parts of zinc oxide), 3.4 parts of chemical sunscreen composition (1 part of phenylbenzimidazole sulfonic acid, 1 part of ethylhexyl methoxycinnamate, and 1.4 parts of diethylamino hydroxybenzoyl hexyl benzoate), and 10 parts of biological sunscreen composition. The mass ratio of the physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition in the sunscreen foundation is 1:17:50.

[0140] Example 7

[0141] Example 7 differs from Example 1 only in that the amount of vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer added to the sunscreen foundation was changed. The total mass ratio of the filler powder to the physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition was 1:4.5.

[0142] Example 8

[0143] Example 8 differs from Example 1 only in that the amount of vinyl polydimethylsiloxane / polymethylsiloxane sesquioxane crosslinked polymer added to the sunscreen foundation was changed. The ratio of the filler powder to the total mass of the physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition was 1:8.7.

[0144] Comparative Example 1

[0145] The only difference between Comparative Example 1 and Example 1 is that the steps of preparing yeast fermentation seed culture and using yeast fermentation seed culture for secondary fermentation are omitted, and only lactic acid bacteria fermentation seed culture combined with enzymatic hydrolysis is used to prepare the biological sunscreen composition.

[0146] Comparative Example 2

[0147] The only difference between Comparative Example 2 and Example 1 is that the steps of preparing lactic acid bacteria fermentation seed culture and fermenting with lactic acid bacteria fermentation seed culture are omitted, and only yeast fermentation seed culture is used for one-step fermentation combined with enzymatic hydrolysis to prepare the biological sunscreen composition.

[0148] Comparative Example 3

[0149] The only difference between Comparative Example 3 and Example 1 is that no compound enzyme powder containing cellulase and pectinase was added in the secondary fermentation step using lactic acid bacteria to ferment the seed culture.

[0150] Comparative Example 4

[0151] The only difference between Comparative Example 4 and Example 1 is that, in the preparation of the biological sunscreen composition, lactic acid bacteria were used instead of Bifidobacterium animalis subsp. lactis, and galactosomal yeast was used instead of Rhodotorula glutinis.

[0152] Comparative Example 5

[0153] The only difference between Comparative Example 5 and Example 1 is that, in the preparation of the biological sunscreen composition, instead of using *Bifidobacterium animalis* subsp. *lactam* and *Rhodotorula glutinis* to ferment and extract the mixture of *Baiwei*, *Edelweiss*, and *Haematococcus pluvialis*, a water extraction method was used, as follows:

[0154] Baiwei, Alpine Edelweiss and Haematococcus pluvialis were dried at 100℃ for 30 minutes, pulverized at 500 rpm for 6 minutes, and passed through a 200-mesh sieve to remove large particles to obtain a powder mixture of Baiwei, Alpine Edelweiss and Haematococcus pluvialis.

[0155] A mixture of powdered *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* was added to a 5L fermenter. The mass ratio of the plant powder to water was controlled at 1:10. The mixture was sterilized at 121°C for 15 minutes, stirred at 37°C at 250 rpm for 32 hours, and then stirred at 28°C at 250 rpm for 24 hours. Post-treatment included filtration using 5C filter paper to remove filter residue, decolorization, deodorization, and the addition of 1.5 wt% activated carbon (based on the total mass of the filtrate). The mixture was stirred at 100 rpm for 11 minutes to obtain a biological sunscreen composition.

[0156] Comparative Example 6

[0157] The only difference between Comparative Example 6 and Example 1 is that the content of the biological sunscreen composition in the sunscreen foundation is reduced to 0.2 parts. Therefore, the mass ratio of physical sunscreen powder, chemical sunscreen composition, and biological sunscreen composition in the sunscreen foundation is 1:7.5:0.5.

[0158] Some technical parameters of Examples 1-8 and Comparative Examples 1-6 are shown in Table 1.

[0159] Test section

[0160] The biological sunscreen compositions and sunscreen foundations prepared in Examples 1-8 and Comparative Examples 1-6 were tested respectively, and the test results are recorded in Table 1.

[0161] I. Testing Section of Bio-Sunscreen Compositions

[0162] 1. Test on the UV absorption capacity of biological sunscreen compositions

[0163] Experimental method: The bio-sunscreen composition of Example 1 was subjected to a full wavelength scan from 200-800 nm to analyze whether there were characteristic absorption peaks in the 200-400 nm ultraviolet region. The test results are shown in [the table below]. Figure 1 .

[0164] from Figure 1 As can be seen from the full wavelength scan spectrum of the product, there are 3 characteristic absorption peaks in the 200-400nm range, indicating that the product has the ability to absorb ultraviolet rays and has a certain chemical sun protection effect.

[0165] 2. Clinical sun protection efficacy test of biological sunscreen composition

[0166] UV erythema test method: Test samples: Take the biological sunscreen composition of Example 1 and prepare test samples with a mass percentage of 1%, 5%, and 7% respectively using sterile water as a solvent according to the weight ratio.

[0167] Operating procedures: Preheat the instrument for 15 minutes in advance, take samples and take pictures in the same photographing environment in sequence, weigh 50uL of sample to apply; irradiate an area of ​​1.5cm*1.5cm, let stand for 15 minutes after application to allow the sample to be fully absorbed.

[0168] Different UVB irradiation doses were administered in the clinical laboratory. In this experiment, the irradiation dose for males was 600 mJ / cm². 2 400mJ / cm for females 2 The test results are as follows: Figures 2-5 As shown.

[0169] As can be seen from the test results shown in the figure, taking the above three subjects as examples, the experimental results show that the 7% biological sunscreen composition is relatively effective in preventing redness and sunburn.

[0170] 3. Erythema Value Evaluation of Biological Sunscreen Compositions

[0171] The biological sunscreen composition was tested. The erythema index was 0-1 (no redness or slight redness, no significant difference compared to the positive control group), 2-3 (slight redness or light redness), and 4-5 (redness, no significant difference compared to the control group). The specific testing method was the same as above.

[0172] 4. Viscosity evaluation of biological sunscreen compositions

[0173] Viscosity testing method: BROOKFIELD / DV1MLV TJ0 viscometer, the test sample was kept at a constant temperature of 25℃ for 2 hours in an incubator with a No. 61 rotor, 50 RPM.

[0174] II. Testing of Sunscreen Foundation

[0175] 1. Clinical evaluation of post-sun itch in foundation

[0176] Using a public opinion survey method, 30 female volunteers aged 20-50 were selected. They tried out various examples and comparative examples of foundation liquids by applying the liquid to their faces with a damp powder puff or beauty sponge. They then applied the foundation as usual, and the participants rated it based on their own feelings.

[0177] Evaluation index 1-5 points: 1-2 points: weak itching sensation, almost imperceptible; 3 points: mild itching sensation, but not obvious; 4-5 points: obvious itching sensation.

[0178] 2. Foundation Sun Protection Factor (SPF) Test

[0179] The sample was prepared at 2 mg / cm³ 2Apply the appropriate amount of solution evenly to the film. For each sample, at least three parallel test samples should be coated. After coating, allow the film to stand in the dark for 20 minutes (drying time varies depending on the formulation; this may be extended to 30 minutes). Place the coated film in a UVA / UVB irradiation chamber and irradiate with UV lamps for 10 minutes. Then, allow it to stand, scan, and calculate the sun protection value (SPF) of each sample. The test results are shown in Table 4 below.

[0180] The results show that the SPF of the sunscreen foundation in the example is higher than that in the comparative example. This indicates that the sunscreen foundation of this application includes a combination of sunscreen active ingredients, such as vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane cross-linked polymer, physical sunscreen powder, chemical sunscreen composition and biological sunscreen composition, which can synergistically enhance the SPF value of the foundation.

[0181] The main technical parameters of Examples 1-8 and Comparative Examples 1-7, and the test results of the prepared biological sunscreen compositions and sunscreen foundations are shown in Table 1.

[0182]

[0183]

[0184] As can be seen from the data in the table, the sunscreen foundation in the example not only has a good sun protection effect, but also causes very little itching, which is almost imperceptible. It is gentle and non-irritating. This indicates that when only physical or chemical sunscreens are added to the formula, some subjects experience more obvious itching. Adding a biological sunscreen composition can effectively alleviate the itching caused by sun exposure in some subjects with sensitive skin, making up for the deficiencies of physical and chemical sunscreens. At the same time, the biological sunscreen composition enhances the activity of skin cells, regulates the skin's immune function, and indirectly improves the skin's resistance to ultraviolet rays. The synergistic effect of the three in the combined use will be the future trend of sunscreen products.

[0185] The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A sunscreen foundation, characterized in that, The sunscreen foundation comprises the following components in parts by weight: Two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer; and two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, respectively. Physical sunscreen powder, 0.2~1 part; Chemical sunscreen composition, 2-6 parts; A biological sunscreen composition, 5-15 parts; the biological sunscreen composition comprises an extract obtained by mixing Baiwei, Alpine Edelweiss and Haematococcus pluvialis in a mass ratio of 1:(2-12):(2-8) and then fermenting them sequentially with Bifidobacterium animalis subsp. lactis and Rhodotorula glutinis. Other ingredients, 22-47 parts; The mass ratio of the physical sunscreen powder, the chemical sunscreen composition, and the biological sunscreen composition in the sunscreen foundation is 1:(7.5~17):(20~50). The mass ratio of the filler powder vinyl polydimethylsiloxane / polymethylsiloxane sesquioxane crosslinked polymer to the total mass of the physical sunscreen powder, the chemical sunscreen composition, and the biological sunscreen composition is 1:(4.5~8.7). The biological sunscreen composition is prepared by the following method: The herbs *Cynanchum paniculatum*, *Edelweiss*, and *Haematococcus pluvialis* were dried and pulverized to obtain a mixed powder of the herbs. Bifidobacterium animalis subsp. lactis was dissolved in Sabouraud dextrose liquid medium to obtain a bacterial suspension; the bacterial suspension was inoculated into a culture medium for activation to obtain lactic acid bacteria fermentation seed culture. Rhodotorula glutinis was dissolved in Sabouraud dextrose liquid medium to obtain a bacterial suspension; The bacterial suspension was inoculated into a culture medium for activation to obtain yeast fermentation seed culture; A mixture of powdered white peony root, alpine edelweiss, and haematococcus pluvialis was placed in a fermentation tank, and lactic acid bacteria fermentation seed bacteria and enzyme powder were added. The enzyme powder was a compound enzyme powder of cellulase and pectinase. Fermentation was carried out to obtain the first fermentation liquid. The yeast seed culture is introduced into the first fermentation broth for fermentation to obtain the second fermentation broth; The second fermentation broth is post-processed to obtain the biological sunscreen composition.

2. The sunscreen foundation according to claim 1, characterized in that, The sum of the mass of the physical sunscreen powder, the chemical sunscreen composition, and the biological sunscreen composition accounts for 5% to 18% of the total mass of the sunscreen foundation; and / or; The bio-sunscreen composition is 5% to 12% by mass in the sunscreen foundation.

3. The sunscreen foundation according to claim 1, characterized in that, The sunscreen foundation must meet at least one of the following characteristics: a. The physical sunscreen powder includes one or more of nano titanium dioxide and zinc oxide; b. The chemical sunscreen composition comprises one or more of the following: ethylhexyl methoxycinnamate, diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl salicylate, bis-ethylhexyloxyphenol methoxyphenyl triazine, and phenylbenzimidazole sulfonic acid; c. The other components include one or more of the following: emulsifiers, oils, film-forming agents, polyols, colorants, and preservatives.

4. The sunscreen foundation according to claim 3, characterized in that, The sunscreen foundation comprises the following components in parts by weight: Two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer; and two parts of the filler-powdered vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, respectively. Physical sunscreen powder, 0.2~1 part; Chemical sunscreen composition, 2-6 parts; A biological sunscreen composition, 5-15 parts; the biological sunscreen composition includes an extract of a mixture of fermented white peony, edelweiss and Haematococcus pluvialis; Emulsifier, 1-6 parts; Oils, 15-25 parts; Film-forming agent, 3-8 parts; 3-8 parts of polyol.

5. The sunscreen foundation according to claim 3, characterized in that, The sunscreen foundation must meet at least one of the following conditions: d. The emulsifier comprises one or more of polyglycerol-3 diisostearate, PEG-30 dihydroxystearate, and lauryl PEG-9 polydimethylsiloxane; e. The oil comprises one or more of dioctyl carbonate, diisopropyl sebacate, and isododecane; f. The film-forming agent comprises one or a combination of trimethylsilyloxysilicate and polymethylsilsesquioxane; g. The polyol includes one or more of glycerol, 1,2-pentanediol and 1,2-hexanediol; h. The colorant includes one or more of CI 77891, CI 77499, CI 77492 and CI 77491; i. The preservatives include one or more of phenoxyethanol, p-hydroxyacetophenone, octyl glycol and ethylhexylglycerin.

6. A method for preparing a sunscreen foundation as described in any one of claims 1 to 5, characterized in that, include: The filler powder, vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, physical sunscreen powder, pigment, chemical sunscreen composition, oil, emulsifier, and film-forming agent are homogenized, and then a biological sunscreen composition, polyol, and preservative are added and homogenized again to obtain the sunscreen foundation liquid.

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