New use of starch, sunscreen composition and application thereof, and sunscreen product

Abstract

The present invention belongs to the field of new daily chemical materials and discloses the use of starch as a sunscreen synergist in preparing a sunscreen product. The sunscreen product contains a chemical sunscreen agent. The starch is unhydrolyzed or unmodified. After the starch is dispersed in an aqueous phase, the solution remains in a suspension state for at least 1 hour. The starch is dispersed in an oil phase and the solution remains in a suspension state for at least 1 hour. The starch used in the present invention is untreated starch that can remain suspended in the oil phase or the aqueous phase for a certain period of time, and can effectively enhance the sunscreen performance of the sunscreen. The present invention also discloses a sunscreen composition, its application, and a sunscreen product.

Description

Technical Field

[0001] The invention belongs to the field of daily chemicals, and in particular relates to a new use of starch, a sunscreen composition and its application, and a sunscreen product. Background Art

[0002] CN116270261A discloses a composite wall material sunscreen microparticle coated with a sunscreen agent, as well as its preparation method and application. The wall material is obtained by self-assembly of porous microparticles adsorbing the sunscreen agent and a protein as a blocking agent, followed by crosslinking or curing. The porous microparticles can be enzyme-modified porous corn starch.

[0003] CN115919667A discloses a pure physical sunscreen powder and a preparation method thereof, wherein modified corn starch is used as a skin feel regulator, and a physical sunscreen is also added to the formula.

[0004] CN109908004B discloses a multiple emulsion sunscreen cosmetic and a preparation method thereof, wherein the cosmetic uses modified corn starch as a thickener.

[0005] CN107087396B discloses a personal care product containing a highly cationic substituted starch. The product contains cationic starch and, among the optional functional ingredients, a sunscreen agent.

[0006] CN1802144A discloses a fragranced solid cosmetic composition based on a modified starch delivery system, which is a water-soluble solid carrier containing modified starch.

[0007] In the above schemes, the starch used is mostly starch that has been hydrolyzed, modified or modified, and more importantly, its solubility, rheological properties, thickening properties and other properties after treatment are utilized.

[0008] KR102458096B1, a cosmetic sebum regulator and a cosmetic sunscreen composition containing the sebum regulator, discloses the use of a cosmetic sebum regulator containing diatomaceous earth and starch in a sunscreen. The patent's Examples and Comparative Examples 1 to 4, which do not use starch, show no difference in UV protection compared to the Examples. The sunscreens used are inorganic sunscreens, specifically titanium dioxide and zinc oxide. In other words, the patent does not suggest that starch contributes to the sunscreen product's sunscreen performance.

[0009] The applicant discovered some peculiar phenomena during the relevant experiments and subsequently filed this application.

[0010] The technical problem to be solved by this solution is: how to improve the sun protection effect of the sunscreen agent in sunscreen products. Summary of the Invention

[0011] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a new use of starch. The starch used in the present invention is starch that has not undergone any treatment and can remain in a suspension state in pure water or liquid oil for a certain period of time, which can effectively improve the sun protection performance of sunscreen.

[0012] At the same time, the invention also discloses a sunscreen composition, application thereof and a sunscreen product.

[0013] To achieve the above-mentioned object, the present invention provides the following technical solutions: starch is used as a sunscreen synergist to prepare sunscreen products;

[0014] The sunscreen product contains chemical sunscreens;

[0015] The starch is starch that has not been hydrolyzed or modified;

[0016] The starch is dispersed in pure water, and the solution remains in a suspension state for at least 1 hour;

[0017] The starch is dispersed in the liquid oil, and the solution remains in a suspension state for at least 1 hour.

[0018] The present invention combines the untreated starch with a chemical sunscreen agent to make the absorption wavelength of the sunscreen product cover 280 to 400 nm, and can absorb UVB and UVA ultraviolet rays. The untreated starch enhances the sunscreen effect of traditional sunscreen agents, and can reduce the amount of traditional sunscreen agents used, thereby improving the shortcomings of traditional sunscreen agents such as a heavy, greasy or irritating feeling on the skin, making the sunscreen cosmetics feel more refreshing, gentle and safer to use.

[0019] During further verification, the present invention found that untreated starch also has a synergistic effect on inorganic sunscreens, but the synergistic effect on inorganic sunscreens is far less than that of chemical sunscreens.

[0020] The possible reason is that corn starch has the characteristics of insoluble or high whiteness particles similar to physical sunscreen powders, and has a certain covering, reflection or scattering effect on ultraviolet light. Therefore, it has a relatively larger room for sun protection enhancement for chemical sunscreen systems, and the degree of enhancement for pure physical sunscreen systems will be relatively slight.

[0021] In the above-mentioned use, the starch is dispersed in pure water and the solution remains in a suspension state for at least 2 hours;

[0022] The starch is dispersed in the oil phase, and the solution remains in a suspension state for at least 2 hours.

[0023] In the above-mentioned use, the starch is corn starch.

[0024] At the same time, the present invention also provides a sunscreen composition, which is composed of starch and a sunscreen agent, wherein the sunscreen agent includes a chemical sunscreen agent, the starch is starch that has not been hydrolyzed or modified, and the weight ratio of the starch to the chemical sunscreen agent is 1-6:5-28;

[0025] After the starch is dispersed in pure water and in liquid oil, the starch is kept in a suspension state for at least 1 hour.

[0026] In the above-mentioned sunscreen composition, the starch is dispersed in pure water, and the solution remains in a suspension state for at least 1 hour;

[0027] The starch is dispersed in the liquid oil, and the solution remains in a suspension state for at least 1 hour.

[0028] In the above-mentioned sunscreen composition, the starch is corn starch.

[0029] In the above-mentioned sunscreen composition, the chemical sunscreen agent is selected from one or more combinations of diethylaminohydroxybenzoyl hexyl benzoate (DHHB), ethylhexyl triazone (EHT), bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), ethylhexyl salicylate (EHS), ethylhexyl methoxycinnamate (EHMC), diethylhexyl butamido triazone (DBT), methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT), and phenylbenzimidazole sulfonic acid (PBSA).

[0030] In addition, the present invention also discloses the use of any of the above compositions in preparing sunscreen products.

[0031] Finally, the present invention also discloses a sunscreen product containing any one of the above compositions.

[0032] In the above-mentioned sunscreen product, the content of the composition in the sunscreen product is 6 to 34 wt%;

[0033] The sunscreen product is in the form of a spray, lotion, gel, cream, stick, air cushion or pressed powder.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] On the one hand, the present invention adopts starch that has not been hydrolyzed, modified or modified, preferably untreated corn starch, which is a powder material of natural plant origin and has easy availability and good safety. On the other hand, the present invention combines the above-mentioned untreated starch with a chemical sunscreen agent, so that the absorption wavelength of the sunscreen product covers 280 to 400 nm, and can absorb UVB and UVA ultraviolet rays. The untreated starch enhances the sunscreen effect of traditional sunscreen agents, and the amount of traditional sunscreen agents used can be reduced, thereby improving the shortcomings of traditional sunscreen agents such as thick, greasy or irritating skin feeling, making the sunscreen cosmetics feel more refreshing, gentle and safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Diagram of the state of hydrolyzed corn starch in water and oil;

[0037] Figure 2 This is a diagram of the state of modified corn starch in water and oil;

[0038] Figure 3 The diagram shows the state of untreated cassava starch in water and oil;

[0039] Figure 4 This is a diagram showing the state of starch treated with partial lipophilicity in water and oil;

[0040] Figure 5 Diagram of the state of untreated corn starch in water and oil. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] Description of the sources of raw materials used in the test of the present invention

[0043] SIMULGEL EG is a blend of sodium acrylate / sodium acryloyldimethyl taurate copolymer / water / isohexadecane / polysorbate 80 / sorbitan oleate.

[0044] Methylene bis-benzotriazolyl tetramethylbutylphenol is the trade name M or PARSOL MAX are water-dispersible samples containing 50% methylene bis-benzotriazolyl tetramethylbutylphenol. The addition amounts in the following test examples refer to the content of methylene bis-benzotriazolyl tetramethylbutylphenol after conversion based on the selected raw materials.

[0045] The trade name Sunhancer Eco SPF Booster is carnauba (COPERNICIA CERIFERA) wax / rice (ORYZA SATIVA) bran wax.

[0046] The standard Chinese name of corn starch that has not been processed is corn (ZEA MAYS) starch.

[0047] The standard Chinese name of hydrolyzed corn starch is hydrolyzed corn starch.

[0048] The standard Chinese name of modified corn starch is modified corn starch.

[0049] The standard Chinese name of untreated cassava starch is cassava starch.

[0050] The others are single-ingredient raw materials and can be purchased commercially.

[0051] Part 1: Testing of Suspension Stability of Different Starches

[0052] In this section, the suspension stability of different starches was tested. The specific test methods are as follows:

[0053] 1.1 Test in pure water

[0054] At room temperature, 3% by weight of starch of different test objects was added to 97% by weight of pure water. After stirring at a low speed for about 1 minute, the dispersion of starch in pure water was observed after standing for different times.

[0055] 1.2 Tests in liquid oil phase

[0056] At room temperature, 3% by weight of the starches from the various test subjects were added to a 97% by weight oil-soluble liquid sunscreen solution containing ethylhexyl methoxycinnamate (EHMC). After low-speed stirring for approximately 1 minute, the mixture was allowed to stand for varying periods of time and the dispersion of the starch in the liquid oil phase was observed.

[0057] The test subjects include: hydrolyzed corn starch, modified corn starch, untreated tapioca starch, aluminum starch octenylsuccinate (lipophilic modified starch), and untreated corn starch;

[0058] The "corn starch" and "tapioca starch" that appear below refer to starch that has not undergone any processing.

[0059] 1.3 Phenomenon Record

[0060] hydrolyzed corn starch

[0061] Hydrolyzed corn starch appears as a uniform, colorless, transparent solution in water; it is dispersed in the oil-soluble liquid sunscreen in the form of fine crystal particles. After standing at room temperature for about 0.5 to 1 hour, most of the crystal particles sink to the bottom, and the overall appearance is relatively transparent (see Figure 1 ).

[0062] Modified corn starch

[0063] Modified corn starch first forms a white suspension in water. After standing at room temperature for about 0.5 to 1 hour, the powder obviously sinks to the bottom, the solution is obviously separated into layers, and most of the upper solution becomes colorless and transparent. In oil-soluble liquid sunscreens, it first forms a white suspension. After standing at room temperature for about 2 to 4 hours, the powder obviously sinks to the bottom, the solution is obviously separated into layers, and part of the upper solution becomes colorless and transparent (see Figure 2 ).

[0064] Unprocessed tapioca starch

[0065] It also forms a white suspension in water. After standing at room temperature for about 0.5 to 1 hour, the powder obviously sinks to the bottom, the solution is obviously separated into layers, and most of the upper solution becomes colorless and transparent. It also forms a white suspension in oil-soluble liquid sunscreen. After standing at room temperature for about 1 to 2 hours, the powder obviously settles to the bottom, the solution is obviously separated into layers, and most of the upper solution becomes colorless and transparent (see Figure 3 ).

[0066] Aluminum starch octenylsuccinate

[0067] After adding it to water, most of the powder will float directly on the water surface, a small part of the powder will sink to the bottom, unable to disperse and mix evenly, and most of the lower solution will become colorless and transparent; it will first form the appearance of a white suspension in oil-soluble liquid sunscreens. After standing at room temperature for about 2 to 4 hours, the powder will obviously sink to the bottom, the solution will obviously separate into layers, and a small part of the upper solution will obviously become colorless and transparent (see Figure 4 ).

[0068] Unprocessed corn starch

[0069] It appears as a white suspension in water, and after standing at room temperature for about 1 to 4 hours, only a small amount of powder sinks to the bottom, and no powder floats on the liquid surface, and it still has the appearance of a white and relatively uniform suspension. It first forms the appearance of a white suspension in oil-soluble liquid sunscreens, and after standing at room temperature for about 2 to 6 hours, the powder does not obviously sink to the bottom, and the solution does not have obvious stratification, and it still has the appearance of a white and uniform suspension (see Figure 5 ).

[0070] Combined with subsequent related tests, we speculate that corn starch is one of the main reasons for the synergistic effect of sun protection due to its unique suspension properties in water and oil phases.

[0071] Part II Safety and Sunscreen Performance Test

[0072] 1. Patch test method (human body method): Select a suitable patch tester and use the closed patch test method. Apply approximately 0.03 ml of the test substance to the patch tester. Apply it to the subject's back with special adhesive tape. Remove the test substance after 24 hours. Observe the skin reaction 0.5, 24, and 48 hours after the patch test. Record the results according to the skin reaction grading standards in the "Technical Specifications for Safety of Cosmetics" (2015 edition).

[0073] Subsequent Examples 1 to 13 all passed the patch test without any adverse reactions, and the results showed that the product of the present invention is safe.

[0074] 2. Sunscreen efficacy testing and evaluation method (in vitro method):

[0075] Test method: According to the international sun protection index test method of the International Organization for Standardization (ISO) and the European Cosmetic Toiletries and Perfumery Association (COLIPA), a certain amount (0.75mg / cm 2 ) sunscreen products were applied to 50mm x 50mm polymethyl methacrylate (PMMA) diffuser panels. The SPF and UVAPF values ​​of the test samples were measured using a UV-2000S UV transmittance analyzer (Labsphere) to evaluate the sunscreen's effectiveness. Readings were taken at five locations on each panel, and three panels were tested in parallel for each protocol. The average of the three panels was used to determine the machine-measured SPF and UVAPF values ​​for that protocol.

[0076] Calculation of sun protection efficiency:

[0077] SPF / UVA PF increase efficiency = [(F n –F0) / F0]×100%

[0078] F n : The SPF / UVA PF value of the starch-added solution (sample group);

[0079] F0: Machine-measured SPF / UVA PF value without starch addition (control group).

[0080] Part 3 Performance Testing of Starch Applications in Sunscreen Products

[0081] 1. Fix the sunscreen and other components and test the sunscreen synergistic effect of each starch.

[0082] The test formula of this section can be referred to Table 1;

[0083] Table 1 Test formula

[0084]

[0085] The preparation method of the formula in Table 1 is:

[0086] Step 1: Heat water, phenoxyethanol and p-hydroxyacetophenone to about 85° C., keep warm and stir until they are completely dispersed to obtain an aqueous phase material;

[0087] Step 2: Heat sunscreen ingredients such as glyceryl stearate SE, diisopropyl sebacate, diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate, and ethylhexyl methoxycinnamate to about 85° C., and stir while maintaining the temperature until completely dissolved to obtain an oil phase material;

[0088] Step 3: Add the above-obtained oil phase material and SIMULGEL EG to the water phase material in sequence. After homogenization and emulsification at about 85°C, stir and cool to about 55°C, add methylene bis-benzotriazolyl tetramethylbutylphenol, stir well, and continue to cool to room temperature.

[0089] Step 4: At room temperature, butanediol and starch are mixed and stirred to be pre-dispersed evenly, and then added to the emulsified and cooled material, and stirred evenly to obtain the relevant sunscreen sample.

[0090] Specific examples and comparative examples are shown in Table 2; the starch in Table 2 is the starch in Table 1;

[0091] Table 2 Formulation Unit: wt%

[0092]

[0093] 2. Without adding sunscreen, test whether each starch has sunscreen performance. The specific formula is shown in Table 3;

[0094] Table 3 Test formula Unit: wt%

[0095]

[0096]

[0097] 3. Referring to the formula in Table 1, while fixing the amount of corn starch at 3 wt%, the amount and composition of the sunscreen were changed and formulated according to the following Table 4 to obtain samples.

[0098] Table 4 Formulation Unit: wt%

[0099]

[0100]

[0101] Note: In Table 4, Examples 6-10 are sample groups, and Comparative Examples 13-17 are corresponding blank groups; zinc oxide or titanium dioxide is added to the oil phase material that has been dissolved at high temperature, mixed, and then added to the aqueous phase for subsequent emulsification and homogenization operations.

[0102] 4. Referring to the formula in Table 1, corn starch was compounded with other sunscreen enhancers and prepared according to the following Table 5 to obtain samples.

[0103] Table 5 Formulation Unit: wt%

[0104]

[0105] Note: In Table 5, Comparative Example 1 corresponds to the blank group; Sunhancer Eco SPF Booster was mixed with corn starch and butanediol and then added.

[0106] 5. The sunscreen performance test results of the above examples and comparative examples are shown in Table 6;

[0107] Table 6 Sunscreen performance test results of Examples 1-13 and Comparative Examples 1-17

[0108]

[0109]

[0110] Result analysis:

[0111] 1. Compared with the control group, Comparative Example 1, the test results of Examples 1-5 show that the addition of 1-6wt% corn starch has a significant sunscreen synergistic effect. When the corn starch is 1-5wt%, the sunscreen enhancement efficiency gradually increases, and the improvement rate basically stabilizes at 6wt%. However, the test results of Comparative Examples 1-5 show that the addition of 3wt% of other treated starches such as hydrolyzed corn starch, modified corn starch, tapioca starch and aluminum starch octenylsuccinate, respectively, has no significant sunscreen synergistic effect.

[0112] The test results of Comparative Examples 6-13 showed that without the addition of sunscreen, the matrix group, corn starch sample group and other starch sample groups had no obvious sunscreen effect.

[0113] The above analysis shows that starch (whether modified or unmodified) does not have a significant sunscreen effect. However, when combined with sunscreens, it can exhibit a sunscreen synergistic effect. This may be due to its unique water-insolubility, good dispersibility in oil, and high whiteness. When used in combination with sunscreens, it can have a certain shielding, reflection, or scattering effect on ultraviolet light, thereby giving it good sunscreen synergistic performance.

[0114] 2. When the amount of corn starch was fixed at 3 wt % and the amount and composition of the sunscreen agent were varied, Examples 6-9 and Comparative Examples 13-16 all exhibited significant sunscreen synergistic effects. The data from Examples 6-8 and Comparative Examples 13-15 show that corn starch significantly enhances the sunscreen effect for the formulation with a slightly lower sunscreen value. This may be because the formulation with a higher sunscreen value has less room for synergistic enhancement through other ingredients, resulting in a relatively smaller synergistic effect. Furthermore, the data from Examples 6-10 and Comparative Examples 13-17 show that corn starch has a more pronounced sunscreen synergistic effect on chemical sunscreen systems than on purely physical sunscreen systems, and also has a significant sunscreen synergistic effect on combined physical and chemical sunscreen systems. This may be because corn starch, similar to the insolubility or high whiteness of physical sunscreen powders, has a certain degree of UV shielding, reflection, or scattering effect, resulting in a relatively greater room for sunscreen synergy with chemical sunscreen systems.

[0115] 3. When the corn starch dosage was fixed at 2 wt % and other sunscreen boosters such as Sunhancer Eco SPF Booster were compounded, Examples 11-13 all showed significant sunscreen synergistic effects compared with Comparative Example 1, and all showed stronger sunscreen synergistic effects compared with Example 2, indicating that the combination of corn starch and Sunhancer Eco SPF Booster has a good synergistic sunscreen effect.

[0116] 6. Application formula examples

[0117] Table 7 Application formula example 1

[0118]

[0119] Table 7 Application formula example 2

[0120]

[0121]

[0122] Table 7 Application formula example 3

[0123]

[0124]

[0125] Result analysis:

[0126] 1. Skin safety: The test results of Examples 1 to 13 showed no adverse reactions.

[0127] 2. In terms of sunscreen product performance, experiments have shown that untreated corn starch has a significant synergistic effect on the sunscreen performance of sunscreens.

[0128] This suggests that the sun protection performance of untreated corn starch-based synergistic sunscreen may not only be due to its opacity, but may also be closely related to certain physical or chemical properties of the corn starch itself. Specifically:

[0129] After hydrolysis, most of the corn starch turns into smaller molecular weight sugar components. Analysis shows that this may be due to its small molecular weight and strong water solubility, which can form a colorless and transparent solution in water, that is, it is highly hydrophilic; its dispersibility in oil-soluble liquid sunscreens is also poor, that is, it has very poor lipophilicity.

[0130] The modified corn starch first forms a white suspension in water. Analysis shows that this may be because it has a certain hydrophilicity after the modification. However, after standing at room temperature for about 0.5 to 1 hour, the powder obviously sinks to the bottom, the solution is obviously stratified, and most of the upper solution becomes colorless and transparent, indicating that its hydrophilicity is relatively weak. It first forms a white suspension in oil-soluble liquid sunscreens. Analysis shows that this may be because it also has a certain lipophilicity after the modification. However, after standing at room temperature for about 2 to 4 hours, the powder obviously precipitates, the solution is obviously stratified, and part of the upper solution becomes colorless and transparent, indicating that its lipophilicity is also relatively weak.

[0131] Other untreated starches, such as tapioca starch, also first form the appearance of a white suspension in water. Analysis shows that this may be because they also have a certain degree of hydrophilicity. However, after standing at room temperature for about 0.5 to 1 hour, the powder obviously sinks to the bottom, the solution is obviously stratified, and most of the upper solution becomes obviously colorless and transparent, indicating that their hydrophilicity is also weak. In oil-soluble liquid sunscreens, they first form the appearance of a white suspension. Analysis shows that this may be because they also have a certain degree of lipophilicity. However, after standing at room temperature for about 1 to 2 hours, the powder obviously settles, the solution is obviously stratified, and most of the upper solution becomes obviously colorless and transparent, indicating that their lipophilicity is also weak.

[0132] In addition, other modified starches that have been treated to be lipophilic, such as aluminum starch octenylsuccinate, when added to water, most of the powder will float directly above the water surface, and a small amount of powder will sink to the bottom and cannot be dispersed and mixed evenly. Most of the lower solution becomes colorless and transparent. Analysis shows that this may be due to its very poor hydrophilicity; it first forms the appearance of a white suspension in oil-soluble liquid sunscreens. After standing at room temperature for about 2 to 4 hours, the powder will obviously sink to the bottom, the solution will obviously be separated into layers, and a small part of the upper solution will obviously become colorless and transparent. Analysis shows that this may be due to its strong lipophilicity.

[0133] The corn starch in this case, which has not undergone any treatment, may have moderate hydrophilicity and lipophilicity, which allows it to form a white uniform suspension slurry in both water and oil-soluble liquid sunscreens, and can still maintain the appearance of a white uniform suspension after being left at room temperature for a long time.

[0134] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A sunscreen product, characterized in that: It is composed of the following components in weight percentage: Butanediol 5%; Phenoxyethanol 0.4%; p-Hydroxyacetophenone 0.3%; SIMULGEL EG 1.5%; Glyceryl Stearate SE 1%; Diisopropyl sebacate 2%; Diethylaminohydroxybenzoyl hexyl benzoate 4%; Ethylhexyl triazone 1%; Bis-ethylhexyloxyphenol methoxyphenyl triazine 1%; Ethylhexyl salicylate 4%; Ethylhexyl methoxycinnamate 8%; Methylene bis-benzotriazolyl tetramethylbutylphenol 2%; Corn starch 2%; Sunhancer Eco SPF Booster; and water added to 100%; The amount of the Sunhancer Eco SPF Booster is 0.5wt%, 1wt% or 3wt%; The corn starch is corn starch that has not been hydrolyzed or modified; the starch is dispersed in pure water and the solution remains in a suspension state for at least 1 hour, or the starch is dispersed in liquid oil and the solution remains in a suspension state for at least 1 hour; Its preparation method is: Step 1: Heat water, phenoxyethanol and p-hydroxyacetophenone to 85° C., and stir until they are completely dispersed to obtain an aqueous phase material; Step 2: Heat glyceryl stearate SE, diisopropyl sebacate, diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate, and ethylhexyl methoxycinnamate to 85° C., and stir while maintaining the temperature until completely dissolved to obtain an oil phase material; Step 3: Add the oil phase material and SIMULGEL EG to the water phase material in sequence. After homogenization and emulsification at 85°C, stir and cool to 55°C, add methylene bis-benzotriazolyl tetramethylbutylphenol, stir well, and continue to cool to room temperature. Step 4: At room temperature, mix butanediol, starch, and Sunhancer Eco SPF Booster and stir until pre-dispersed evenly. Then add the mixture to the material in step 3 and stir evenly.

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