Sunscreen synergistic composition, sunscreen cosmetics and application thereof

Abstract

The present application belongs to the field of cosmetic technology, and specifically relates to a sunscreen synergistic composition, sunscreen cosmetics and applications. The present application provides a new type of sunscreen synergistic composition by selecting four components, namely RonaFlair®LDP White, silk powder, ergothioneine and acrylic acid (ester) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer, and scientifically proportioning them. The sunscreen synergistic composition can be applied to sunscreen cosmetics to synergistically enhance the sunscreen effect of sunscreen agents, reduce the types and amounts of sunscreen agents in sunscreen cosmetics, have broad market value and application prospects, and have unexpected technical effects. The present application also selects dipentaerythritol pentaisostearate as the fifth component of the sunscreen synergistic composition. This component can be matched with the above four raw materials, and by controlling its addition amount, the comprehensive sunscreen effect of the product can be significantly improved.

Description

Technical Field

[0001] The present application belongs to the technical field of cosmetics, and specifically relates to a sunscreen synergistic composition, sunscreen cosmetics and applications. Background Art

[0002] Although ultraviolet (UV) radiation in solar radiation only accounts for 5% of the total radiation, its impact on human skin is profound and complex. Ultraviolet rays are divided into three types according to their wavelengths: UV-A, UV-B and UV-C. Among them, UV-C is almost completely absorbed by the ozone layer in the atmosphere, so it has less impact on the skin. In contrast, UV-B radiation can penetrate the epidermis, causing skin redness, swelling and pain, and is the main factor causing skin sunburn. UV-A radiation can reach the dermis and accelerate the formation of wrinkles and pigmentation. Therefore, given the harmful effects of UV radiation on the skin, it is crucial to take effective sun protection measures.

[0003] As an important means of ultraviolet protection, the sun protection factor (SPF) and protection factor (UVAPF, Ultraviolet A Protection Factor) of sunscreen cosmetics will reflect their protection against UV-B and UV-A respectively, and determine the overall sun protection effect of sunscreen cosmetics. Specifically, SPF is a protection index to evaluate the ability of sunscreen cosmetics to protect the skin from sunburn / sunburn. The SPF value is equal to the ratio of the time required for the skin to reach the erythema formation threshold after applying sunscreen cosmetics to the time required for the skin to reach the erythema formation threshold after not applying sunscreen cosmetics. Therefore, the higher the SPF value, it means that sunscreen cosmetics can provide longer-term protection to prevent the occurrence of sunburn. UVAPF is used to indicate the sunscreen efficacy of sunscreen cosmetics against UV-A. The higher the UVAPF value, the better the protection effect of sunscreen cosmetics against UV-A.

[0004] Studies have shown that the amount of sunscreen added to sunscreen cosmetics is directly proportional to the SPF and UVAPF values. Theoretically, increasing the amount of sunscreen added is a direct way to make sunscreen cosmetics obtain better sun protection effects. However, in practical applications, it is necessary to balance the amount added with factors such as cosmetic safety and user experience. Therefore, how to obtain higher SPF and UVAPF values ​​under limited sunscreen addition conditions is a topic of great research value in the industry. At present, the more common research directions focus on the synergistic enhancement of multiple sunscreens, such as the synergy of organic UV absorbers and inorganic UV shielding agents, and the synergy of oil-soluble / oil-dispersible and water-soluble / water-dispersible sunscreens. Of course, another part of the research focuses on the design of sunscreen synergistic products. For example, the sunscreen synergistic composition disclosed in patent CN 108014060 B is composed of four active ingredients: tocopherol acetate, ascorbyl tetraisopalmitate, ginger root extract and bisabolol. It is not a sunscreen itself, but adding it to sunscreen cosmetics can enhance the sunscreen effect of the sunscreen and improve the safety, effectiveness and use experience of the product. The sunscreen synergist disclosed in patent CN 116549349 A is composed of four ingredients: flavonoid compounds, plant extracts, copolymers and cellulose. By adding the sunscreen synergist to sunscreen cosmetics, the sunscreen synergist can work together with other substances in the sunscreen to increase the SPF value. Summary of the invention

[0005] The first purpose of the present application is to provide a sunscreen synergistic composition that can improve the sunscreen effect of sunscreen cosmetics by selecting raw materials and scientifically proportioning the components, which is specifically achieved through the following technical solutions:

[0006] A sunscreen synergistic composition, calculated by weight, comprises the following components: 0.5-3 parts of RonaFlair® LDPWhite, 0.1-1.5 parts of silk powder, 0.001-1 parts of ergothioneine and 0.1-1 parts of acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer.

[0007] The silk powder is obtained by directional enzymatic hydrolysis and air flow milling of silk. It is an elongated crystalline powder with a fineness of 5-10 μm, and its main component is silk fibroin. RonaFlair® LDP White is a spherical composite composed of 64-80% aluminum potassium sodium silicate and 10-18% silica as the inner core, and 10-18% titanium dioxide is coated on its surface. It can scatter ultraviolet light.

[0008] The sunscreen effect depends largely on the uniformity and persistence of the distribution of sunscreen active ingredients on the skin surface. The four components in the sunscreen synergistic composition of this application can work synergistically to jointly promote the protective efficacy of sunscreen cosmetics, and have unexpected technical effects. Specifically, during use, silk vermiculin protein can construct a unique fence structure composed of slender needle-like particles on the skin surface based on its spreadability and affinity for the stratum corneum; further, this application utilizes the good dispersibility of acrylic acid (ester) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer for RonaFlair® LDP White, which can well anchor RonaFlair® LDP White in the silk powder fence structure, reduce the migration and shedding of RonaFlair® LDP White on the skin, and ensure that RonaFlair® LDP White can scatter ultraviolet light on the skin surface for a long time. In order to solve the technical problem of excessive light load of organic sunscreen caused by the scattering effect of RonaFlair® LDP White, the present application utilizes the hygroscopic properties of silk powder to cooperate with ergothioneine, an antioxidant ingredient, to promote the uniform distribution of ergothioneine on the skin surface, and then utilizes the antioxidant properties of the evenly distributed ergothioneine to alleviate the light load of RonaFlair® LDP White organic sunscreen, effectively respond to the generation of free radicals, and improve the overall effectiveness of sunscreen products.

[0009] Preferably, the sunscreen synergistic composition comprises the following components, calculated by mass: 2.2 to 3 parts of RonaFlair® LDP White, 0.16 to 1.5 parts of silk powder, 0.006 to 1 parts of ergothioneine and 0.5 to 1 parts of acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer.

[0010] Preferably, the sunscreen synergistic composition comprises the following components, calculated by mass: 2.5 to 3 parts of RonaFlair® LDP White, 0.7 to 1.5 parts of silk powder, 0.1 to 0.7 parts of ergothioneine and 0.8 to 1 parts of acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer.

[0011] Preferably, the sunscreen synergistic composition further comprises 0.1 to 1 parts of dipentaerythritol pentaisostearate by weight. This technical solution, by adding dipentaerythritol pentaisostearate, can strengthen the fence structure formed by silk powder after the volatile oil evaporates, so that RonaFlair® LDP White can be better fixed in the silk powder fence structure, further improving the sunscreen effect.

[0012] Preferably, the sunscreen synergistic composition comprises the following components, calculated by mass: 1.8 to 3 parts of RonaFlair® LDP White, 0.15 to 1.5 parts of silk powder, 0.1 to 0.7 parts of ergothioneine, 0.6 to 1 parts of acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer, and 0.6 to 1 parts of dipentaerythritol pentaisostearate.

[0013] Preferably, the sunscreen synergistic composition comprises the following components, calculated by mass: 3 parts of RonaFlair®LDP White, 1.2 parts of silk powder, 0.3 parts of ergothioneine, 1 part of acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer, and 1 part of dipentaerythritol pentaisostearate.

[0014] Use of any of the above-mentioned sunscreen synergistic compositions in sunscreen cosmetics.

[0015] A sunscreen cosmetic comprising any one of the above-mentioned sunscreen synergistic compositions, including sunscreen primers, sunscreen creams, sunscreen sticks, sunscreen milks, sunscreen liquid foundations, sunscreen powder creams, sunscreen powder creams, sunscreen air cushion foundations, etc.

[0016] Preferably, the sunscreen cosmetic comprises 1 to 15 parts of an organic ultraviolet absorber and 1 to 15 parts of an inorganic ultraviolet shielding agent.

[0017] Preferably, the sunscreen cosmetic comprises 10 to 40 parts of moisturizing oil, 2 to 8 parts of emulsifier, 1 to 10 parts of film former, 0.3 to 1.5 parts of thickener, 0 to 15 parts of colorant, 0.8 to 1.5 parts of emulsion stabilizer, 0.02 to 0.2 parts of chelating agent, 3 to 12 parts of polyol moisturizer, and 0.3 to 1 parts of preservative.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] The present application provides a novel sunscreen synergistic composition by selecting four components, namely RonaFlair® LDP White, silk powder, ergothioneine and acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer, and scientifically proportioning them. The sunscreen synergistic composition can be applied to sunscreen cosmetics to synergistically enhance the sunscreen effect of sunscreen agents, reduce the types and amounts of sunscreen agents in sunscreen cosmetics, and improve the safety, effectiveness and skin feel of sunscreen cosmetics, and has broad market value and application prospects. Specifically, performance experiments show that the above four components can not achieve the technical effect of improving the comprehensive sun protection performance of the present application under all ratios. Taking comparative examples 5 to 7 as examples, their sun protection index SPF is between 109 and 112, and the UVAPF index is between 9.14 and 9.37, which is very close to the blank control group; on the other hand, in embodiments 1 to 10 of the present application, the sun protection index SPF is between 115 and 153, and the UVAPF value is between 9.72 and 13.88. Especially under the preferred ratio conditions, the sun protection index SPF reaches up to 153, and the UVAPF value reaches 13.88, showing an unexpected comprehensive sun protection enhancement effect.

[0020] The present application also selects dipentaerythritol pentaisostearate as the fifth component of the sunscreen synergistic composition. This component can cooperate with the silk powder fence structure to further promote the long-lasting adhesion of the sunscreen synergistic active ingredients on the skin surface. Furthermore, by controlling its addition amount, the comprehensive sunscreen effect of the product can be significantly improved. The performance test results show that dipentaerythritol pentaisostearate can be effectively coordinated with the other four components to greatly improve the comprehensive sunscreen synergistic effect of the sunscreen synergistic combination. Specifically, the SPF values ​​of the sunscreen cosmetics of Comparative Examples 16 and 17 using the same raw materials but different proportions are between 112 and 115, and the UVAPF values ​​are between 9.13 and 9.23, which are not much different from the blank control group; on the other hand, the SPF values ​​of the sunscreen cosmetics of Examples 11 to 16 of the present application are between 140 and 171, and the UVAPF values ​​are between 10.76 and 14.95. Especially under the preferred ratio conditions, the sun protection index SPF reaches a maximum of 171, and the UVAPF value reaches 14.95, showing an unexpected comprehensive sunscreen synergistic effect. DETAILED DESCRIPTION

[0021] The present application will be further described below in the form of specific embodiments. Those of ordinary skill in the art will be able to implement the present application based on these descriptions. In addition, the embodiments of the present application involved in the following description are generally only embodiments of a part of the present application, rather than all embodiments. Therefore, based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work should fall within the scope of protection of the present application.

[0022] In the following embodiments, the preparation method of sunscreen cosmetics comprises the following steps: S1, stirring and dispersing the raw materials of phase A uniformly to obtain a phase A dispersion; the raw materials of phase A include emollient oil, organic ultraviolet absorber, emulsifier, film former, thickener, acrylic acid (ester) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer; S2, grinding or crushing phase B uniformly, adding it to the phase A dispersion, stirring and dispersing uniformly to obtain a first mixed solution; the phase B includes an inorganic ultraviolet shielding agent and a colorant; S3, adding phase C to the first mixed solution, stirring and dispersing uniformly to obtain a second mixed solution; the phase C includes RonaFlair® LDP White and silk powder; S4, stirring the raw materials of phase D uniformly to obtain a phase D dispersion, and then adding it to the second mixed solution for homogenization and emulsification, vacuum degassing, and obtaining a sunscreen cosmetic; the phase D includes ergothioneine, an emulsion stabilizer, a chelating agent, a polyol moisturizer, a preservative, and a solvent of water. In the following examples, when preparing cosmetics containing dipentaerythritol pentaisostearate, the above-mentioned sunscreen cosmetic phase A also includes dipentaerythritol pentaisostearate.

[0023]

Group 1

[0024] In order to briefly and clearly demonstrate the beneficial effects of adjusting the proportions of each group of the present application, this group discloses 10 groups of embodiments, corresponding comparative examples 1 to 7, and a blank group. On this basis, this group also simultaneously conducted performance tests on the prepared sunscreen cosmetics. The objects of the performance tests were SPF and UVAPF. The test standard adopted COLIPA 2011 and the test instrument was UV-2000S. Specifically, the formulas of the sunscreen cosmetics of the embodiments, blank groups and comparative examples are detailed in the following table:

[0025] Table 1. Sunscreen cosmetic formula

[0026]

[0027] Note: The total mass fraction of each component of sunscreen cosmetic raw materials in the above table is 100 parts.

[0028] Table 2. Sunscreen synergistic composition formula and performance test results

[0029]

[0030] By observing the performance test results of Example 2 and the blank control group in the above table, it can be seen that the present application can effectively improve the comprehensive sunscreen effect of sunscreen cosmetics by selecting four raw materials, RonaFlair® LDP White, silk powder, ergothioneine and acrylic acid (ester) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer, as a sunscreen synergistic composition. Further, in order to verify the coordination relationship between the four components, comparative examples 1 to 4 are set up with a single component missing test design based on the addition amount of the components in Example 2. The performance test results show that when no component is added to the sunscreen synergistic composition, compared with the performance test results of Example 2, the sun protection index SPF of comparative examples 1 to 4 is reduced by 10 to 15, and the UVAPF value is reduced by 0.82 to 1.18, which reversely confirms that there is a synergistic effect between the above four components.

[0031] It can be seen from the performance test results of Examples 1 to 10 and Comparative Examples 5 to 7 in the above table that the present application further improves the sunscreen effect of sunscreen cosmetics by setting the addition amount of four raw materials, namely, RonaFlair® LDP White, silk powder, ergothioneine, and acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer. Specifically, the sunscreen index SPF of Examples 1 to 10 is between 115 and 153, and the UVAPF value is between 9.72 and 13.88; while the sunscreen index SPF of Comparative Examples 5 to 7 is between 109 and 112, and the UVAPF index is between 9.14 and 9.37, which is very close to the blank control group; it can be seen that the addition of RonaFlair® LDP White, silk powder, ergothioneine, and acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer in any proportion can achieve the sunscreen synergistic effect of the present application.

[0032] By observing the performance test results of Examples 1 to 5 and Examples 6 to 10 in the above table, it can be seen that the present application can further enhance the sunscreen effect of sunscreen cosmetics by adjusting the addition amount of each component. Specifically, the SPF value in Examples 1 to 5 is between 115 and 135, and the UVAPF value is between 9.72 and 10.51, which is 7 to 27 higher than the blank control group SPF value, and 0.67 to 1.46 higher UVAPF value; while in Examples 6 to 10, the SPF value is between 141 and 153, and the UVAPF value is between 10.73 and 13.88, which is 33 to 45 higher than the blank control group SPF value, and 1.68 to 4.83 higher UVAPF value, showing a good sunscreen synergistic effect. Furthermore, by further adjusting the addition range of the mass fractions of each component, Examples 7 to 9 have an SPF value of up to about 150, and the UVAPF value exceeds 13, showing a good comprehensive sunscreen effect, with unexpected technical effects.

[0033]

Group 2

[0034] This group discloses 6 groups of embodiments, corresponding comparative examples 8 to 17, and a blank group. On this basis, this group also simultaneously conducted performance tests on the prepared sunscreen cosmetics. The objects of the performance tests were SPF and UVAPF. The test standard adopted COLIPA 2011 and the test instrument was UV-2000S. Specifically, the formulas of the sunscreen cosmetics of the embodiments, blank groups and comparative examples are detailed in the following table:

[0035] Table 3. Sunscreen cosmetic formula

[0036]

[0037] Note: The total mass fraction of each component of sunscreen cosmetic raw materials is 100 parts.

[0038] Table 4. Components of sunscreen synergistic composition and performance test results

[0039]

[0040] By observing the performance test results of Example 11 and the blank control group in the above table, it can be seen that the present application can effectively improve the sunscreen effect of sunscreen cosmetics by selecting five raw materials, namely RonaFlair® LDP White, silk powder, ergothioneine, acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer and dipentaerythritol pentaisostearate, as the sunscreen synergistic composition. Compared with the blank control group, the SPF value of the sunscreen cosmetics in Example 11 increased by 40, and the UVAPF value increased by 4.06, showing a good sunscreen synergistic effect.

[0041] By observing the performance test results of the sunscreen cosmetics prepared in Example 11 and Example 2 in the above table, it can be seen that under the same parameter ratio, the present application can significantly improve the sunscreen effect of sunscreen cosmetics by further introducing dipentaerythritol pentaisostearate on the basis of four raw materials: RonaFlair® LDP White, silk powder, ergothioneine, acrylic acid (ester) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer. Specifically, compared with Example 2, the SPF value of the sunscreen cosmetics disclosed in Example 11 is increased by 24, while the UVAPF value is increased by 2.88, which shows that the addition of dipentaerythritol pentaisostearate can optimize the synergistic effect between the components and promote the effective coordination between the ingredients, thereby achieving a synergistic improvement in overall performance.

[0042] By observing Examples 11 to 16 in the above table, as well as Comparative Examples 16 and 17, it can be found that the addition of RonaFlair® LDP White, silk powder, ergothioneine, acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer and dipentaerythritol pentaisostearate in any proportion can achieve the above-mentioned sunscreen synergistic effect. Specifically, the SPF value of the sunscreen cosmetics of Examples 11 to 16 within the composition ratio range of the present application is between 140 and 171, and the UVAPF value is between 10.76 and 14.95; while the SPF value of the sunscreen cosmetics of Comparative Examples 16 and 17 is between 112 and 115, and the UVAPF value is between 9.13 and 9.23, which is not much different from the blank control group. Further, in Examples 12 to 14, by further adjusting the ratio range between the components, compared with Examples 11, 15 and 16, the SPF value exceeded 150, and the UVAPF value reached about 14, reflecting a good comprehensive sunscreen effect. In particular, in Example 13, 3 parts of RonaFlair® LDP White, 1.2 parts of silk powder, 0.3 parts of ergothioneine, 1 part of acrylic acid (ester) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer and 1 part of dipentaerythritol pentaisostearate were used as sunscreen synergistic compositions, and the SPF value of the sunscreen cosmetics exceeded 170, and the UVAPF value was close to 15, far exceeding the blank control group and even other examples, reflecting an excellent comprehensive sunscreen effect.

[0043] In order to prove the creativity of the raw material selection of the present application, the present performance test also sets comparative examples 12 to 15 by adjusting the components on the basis of Example 12. By comparing the performance test results, it can be found that not all components with similar functions can produce the above-mentioned technical effects of the present application by cooperating with the other four components. Specifically, in Comparative Example 12, on the basis of Example 12, the silk powder is adjusted to corn starch, and the SPF value is reduced by 23 and the UVAPF value is reduced by 3.54 compared with Example 12; in Comparative Example 13, on the basis of Example 12, RonaFlair® LDP White is adjusted to SOLESPHERETML-51 (silica), and the SPF value is reduced by 34 and the UVAPF value is reduced by 4.01 compared with Example 12; in Comparative Example 14, ergothioneine is adjusted to tocopherol (vitamin E), on the basis of Example 12, the SPF value is reduced by 23 and the UVAPF value is reduced by 3.56 compared with Example 12; in Comparative Example 15, acrylic acid (esters) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer is adjusted to sorbitan sesquiisostearate, and the SPF value is reduced by 26 and the UVAPF value is reduced by 3.7 compared with Example 12; it can be seen that the five components of this embodiment can be effectively coordinated to jointly increase the comprehensive sunscreen effect of sunscreen cosmetics.

[0044] In addition, for the core ingredient silk powder in the sunscreen synergistic composition of the present application, comparative examples 8 to 12 are based on Example 11, by adjusting the silk powder to corn starch, and further based on the enlightenment of the preferred addition of each component in Example 12, the proportion of other components is adjusted to verify the substitutability of silk powder and the synergistic upper limit of the sunscreen synergistic composition containing corn starch. The test results show that by increasing the addition amount of RonaFlair® LDP White, ergothioneine, dipentaerythritol pentaisostearate, and acrylic acid (ester) / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer, the comprehensive sunscreen effect of the corn starch sunscreen synergistic composition can only be slightly improved, and its maximum SPF increase is 9, and the UVAPF increase is 0.34. It can be seen that corn starch cannot be effectively combined with the other four raw materials to greatly improve the sunscreen effect of sunscreen cosmetics, and it is impossible to compensate for the lack of silk powder by adjusting the amount of component addition. The problem of insufficient sunscreen effect caused by the lack of silk powder.

Claims

1. A sunscreen synergistic composition, characterized in that: In parts by mass, it is composed of the following components: RonaFlair® LDP White 0.5~3 parts; 0.1~1.5 parts of silk powder; Ergothioneine 0.001~1 part; Acrylates / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer 0.1~1 part.

2. A sunscreen synergistic composition according to claim 1, characterized in that: In parts by mass, it is composed of the following components: RonaFlair® LDP White 2.2~3 parts; 0.16~1.5 parts of silk powder; Ergothioneine 0.006~1 part; Acrylates / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer 0.5~1 part.

3. A sunscreen synergistic composition according to claim 2, characterized in that: In parts by mass, it is composed of the following components: RonaFlair® LDP White 2.5~3 parts; 0.7~1.5 parts of silk powder; Ergothioneine 0.1-0.7 parts; Acrylates / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer 0.8~1 part.

4. A sunscreen synergistic composition, characterized in that: In parts by mass, the sunscreen synergistic composition comprises: RonaFlair® LDP White 0.5~3 parts; 0.1~1.5 parts of silk powder; Ergothioneine 0.001~1 part; 0.1~1 part of dipentaerythritol pentaisostearate Acrylates / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer 0.1~1 part.

5. A sunscreen synergistic composition according to claim 4, characterized in that: In parts by mass, it includes the following components: RonaFlair® LDP White 1.8~3 parts; 0.15~1.5 parts of silk powder; Ergothioneine 0.01-0.7 parts; 0.6-1 part of dipentaerythritol pentaisostearate; Acrylates / ethylhexyl acrylate / polydimethylsiloxane methacrylate copolymer 0.6~1 part.

6. A sunscreen synergistic composition according to claim 5, characterized in that: In parts by mass, it includes the following components: RonaFlair® LDP White 3 parts; 1.2 parts of silk powder; 0.3 parts of ergothioneine; 1 part of dipentaerythritol pentaisostearate; 1 part of Acrylates / Ethylhexyl Acrylate / Dimethicone Methacrylate Copolymer.

7. Use of the sunscreen synergistic composition according to any one of claims 1 to 6 in sunscreen cosmetics.

8. A sunscreen cosmetic, characterized in that: The invention comprises the sunscreen synergistic composition according to any one of claims 1 to 6.

9. A sunscreen cosmetic according to claim 8, characterized in that: The sunscreen cosmetic comprises 1 to 15 parts of an organic ultraviolet absorber and 1 to 15 parts of an inorganic ultraviolet shielding agent.

10. A sunscreen cosmetic according to claim 9, characterized in that: The sunscreen cosmetic comprises 10 to 40 parts of moisturizing oil, 2 to 8 parts of emulsifier, 1 to 10 parts of film former, 0.3 to 1.5 parts of thickener, 0 to 15 parts of colorant, 0.8 to 1.5 parts of emulsion stabilizer, 0.02 to 0.2 parts of chelating agent, 3 to 12 parts of polyol moisturizer and 0.3 to 1 parts of preservative.

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