An oil-in-water high-fold pure physical sunscreen cream and a preparation method thereof

Abstract

The application relates to the cosmetic technical field, and particularly provides an oil-in-water high-multiple pure physical sunscreen cream, which is characterized in that, according to the total weight of 100 parts, the components of the oil-in-water high-multiple pure physical sunscreen cream include: physical sunscreen powder 10-30 parts, thickening agent 1-8 parts, main emulsifier 1-10 parts, auxiliary emulsifier 0-5 parts, moisturizing agent 0.5-20 parts, film forming agent 1-7 parts, emollient 3-30 parts, suspending agent 0.1-5 parts, and deionized water supplementing the rest amount. The sunscreen cream contains a large amount of physical sunscreen agents in an oil-in-water system, has a refreshing texture, and has a strong sunscreen effect.

Description

Technical Field

[0001] This invention relates to the field of cosmetics technology, A61Q17 / 04, and particularly to a water-in-oil type high-SPF pure physical sunscreen and its preparation method. Background Technology

[0002] Sunscreen is a crucial step in skincare. Good sun protection can effectively prevent photoaging-induced age spots and wrinkles. Currently, emulsified sunscreens mainly include oil-in-water and water-in-oil types. Oil-in-water sunscreens contain a high content of oil and a large amount of emulsifiers, which usually results in a heavy, sticky feel on the skin. Water-in-oil sunscreens have a better feel, but their water resistance is poor. In hot summers, users sweat more and swim more often, which will cause the water-in-oil sunscreen to be washed away, significantly reducing its sun protection effect.

[0003] Sunscreen primarily relies on reflecting or replacing the absorption of ultraviolet light in the 280-400nm wavelength range. Effective sunscreen ingredients include physical sunscreen powders such as titanium dioxide and zinc oxide, and chemical sunscreens such as PEG-25 para-aminobenzoic acid, dimethyl PABA ethylhexyl ester, ethylhexyl salicylate, and ethylhexyl methoxycinnamate. Compared to chemical sunscreens, physical sunscreen powders are generally safer for the skin, but offer less protection against ultraviolet light. To achieve high protection against both UVA and UVB rays, a higher concentration of physical sunscreen powder is required, but this can lead to instability in the system, especially in water-in-oil systems, and result in poor spreadability, texture, and overall skin feel.

[0004] Chinese patent CN117159398A discloses a superfluid composite sunscreen agent and an oil-in-water-in-oil triple sunscreen emulsion, which mainly contains the following components in the following mass percentages: sunscreen composition 0.1-60%, polyglycerol-10 diisostearate 0.1-5%, and cholesterol polyether-24 0.1-5%. The sunscreen composition is a mixture of ethylhexyl salicylate, ethylhexyl triazine ketone, diethylamino hydroxybenzoyl hexyl benzoate, and octocrylene. Although it has good system storage stability, it still uses a large amount of chemical sunscreen agents, and cannot avoid the potential harm of chemical sunscreen agents to the skin and human body. Chinese patent CN105934232B discloses an aqueous dispersion of particulate inorganic powder treated with hydrophobic organic surface and a cosmetic containing the aqueous dispersion. The aqueous dispersion contains particulate inorganic powder treated with hydrophobic organic surface, polyol, water and nonionic surfactant. Although it has good sweat resistance, water resistance and feel, there is still much room for improvement in its UV shielding effect.

[0005] Therefore, it is of great significance to develop a water-in-oil type pure physical sunscreen with high SPF and PA values, excellent system stability, refreshing feel on the skin, light and non-greasy texture, and easy spreadability. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention first provides a water-in-oil type high-SPF pure physical sunscreen lotion; based on a total weight of 100 parts, the water-in-oil type high-SPF pure physical sunscreen lotion comprises: 10-30 parts physical sunscreen powder, 1-8 parts thickener, 1-10 parts main emulsifier, 0.1-5 parts co-emulsifier, 0.5-20 parts moisturizer, 1-7 parts film-forming agent, 3-30 parts skin moisturizer, 0.1-5 parts suspending agent, and deionized water to make up the balance.

[0007] Furthermore, based on a total weight of 100 parts, the ingredients of the water-in-oil type high-SPF pure physical sunscreen emulsion include: 15-20 parts physical sunscreen powder, 1.5-4 parts thickener, 3-9.5 parts main emulsifier, 0.5-3 parts co-emulsifier, 3-10 parts moisturizer, 2-5 parts film-forming agent, 5-25 parts skin moisturizer, 0.5-2 parts suspending agent, and deionized water to make up the balance.

[0008] Furthermore, the physical sunscreen powder includes zinc oxide and titanium dioxide.

[0009] Furthermore, the weight ratio of zinc oxide to titanium dioxide in the physical sunscreen powder is 1:1-4, preferably 1:1.6-2.6.

[0010] Furthermore, the zinc oxide is selected from zinc oxide that has undergone surface treatment with at least one of silicon, stearic acid, and amino acids.

[0011] Furthermore, the titanium dioxide is selected from titanium dioxide that has undergone surface treatment with at least one of silicon, stearic acid, and amino acids.

[0012] Furthermore, the thickener includes, but is not limited to, at least one of bentonite, ammonium acryloyl dimethyl taurate / VP copolymer, xanthan gum, acrylate / C10-30 alkyl acrylate crosspolymer, quaternary ammonium salt-90 montmorillonite, and quaternary ammonium salt-18 montmorillonite.

[0013] Preferably, the thickener comprises bentonite and ammonium acryloyldimethyl taurate / VP copolymer.

[0014] Furthermore, the thickener further includes at least two of the following: hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (and) water (and) squalane; hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate; polyacrylamide (and) C13-14 isoparaffin (and) lauryl ether-7 (and) water; and polyacrylate-13 (and) polyisobutylene (and) polysorbate 20.

[0015] Furthermore, the thickener also includes hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (and) water (and) squalane, hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate.

[0016] Preferably, based on a total weight of 100 parts of the physical sunscreen lotion, the thickener comprises: 1.5-2 parts bentonite, 0.1-0.2 parts ammonium acryloyldimethyl taurate / VP copolymer, 0.3-1.5 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (and) water (and) squalane, and 0-0.2 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate.

[0017] Furthermore, the primary emulsifier includes, but is not limited to, at least one of polysorbate-60, polysorbate-80, polyglycerol-10 stearate, glyceryl stearate (and) PEG-100 stearate, cetearyl alcohol (and) cetearyl glucoside, polyglycerol-3 distearate (and) glyceryl stearate citrate.

[0018] Further, based on a total weight of 100 parts for the physical sunscreen lotion, the main emulsifier includes 0.1-2 parts of polysorbate-80, 0-1.5 parts of polyglycerol-10 stearate, 1-2 parts of glyceryl stearate (and) PEG-100 stearate, 1-2 parts of cetearyl alcohol (and) cetearyl glucoside, and 0-1 parts of polyglycerol-3 distearate (and) glyceryl stearate citrate.

[0019] Furthermore, the co-emulsifier includes polyglycerol-2 triisostearate.

[0020] Furthermore, based on a total weight of 100 parts of the physical sunscreen lotion, the co-emulsifier includes 0.55-1.0 parts of polyglycerol-2 triisostearate.

[0021] Furthermore, the moisturizer includes, but is not limited to, at least one of butylene glycol, pentanediol, glycerin, glyceryl polyether-26, and ethylhexylglycerin.

[0022] Furthermore, the moisturizer includes butylene glycol, pentanediol, glycerin, glyceryl polyether-26, and ethylhexylglycerin.

[0023] Further, based on a total weight of 100 parts of the physical sunscreen lotion, the moisturizer includes 1-3 parts butylene glycol, 1-2 parts pentanediol, 0.5-2 parts glycerin, 0.5-2 parts glycerin polyether-26, and 0.01-0.05 parts ethylhexylglycerin.

[0024] Furthermore, the film-forming agent includes, but is not limited to, at least one of styrene / acrylate copolymer, VP / eicosene copolymer, triacontyl PVP, and VP / eicosene copolymer. It forms a film on the skin surface, improving the uniformity of the sunscreen film and enhancing its water resistance and durability.

[0025] Furthermore, the film-forming agent includes styrene / acrylate copolymer and VP / eicosene copolymer.

[0026] Preferably, based on a total weight of 100 parts of the physical sunscreen emulsion, the film-forming agent comprises 1.5-3.0 parts of styrene / acrylate copolymer and 0.5-2 parts of VP / eicosene copolymer.

[0027] Furthermore, the emollient includes, but is not limited to, at least one of neopentyl glycol dioctanoate / didecanoate, polydimethylsiloxane, octyl polymethylsiloxane, polyhydroxystearic acid, and butyl octyl salicylate.

[0028] Furthermore, based on a total weight of 100 parts for the physical sunscreen lotion, the emollient comprises 2-6 parts neopentyl glycol dicaprylate / didecanoate, 2-4 parts polydimethylsiloxane, 1-3 parts octyl polymethylsiloxane, 0.2-0.5 parts polyhydroxystearic acid, and 0-10 parts butyl octyl salicylate. The use of emollients in this application can improve the product's feel on the skin; however, the emollient is specified to include 2-4 parts polydimethylsiloxane and 2-6 parts neopentyl glycol dicaprylate / didecanoate. Both of these can also regulate intermolecular interactions within the system, improving the product's spreadability and reducing greasiness.

[0029] Furthermore, the suspending agent includes, but is not limited to, at least one of polymethylsilsesquioxane, vinyl polydimethylsiloxane / polymethylsilsesquioxane cross-linked polymer, silica, methyl methacrylate cross-linked polymer, mica, and lauroyl lysine.

[0030] Furthermore, the suspending agent comprises polymethylsilsesquioxane.

[0031] Furthermore, physical sunscreens also contain 0.1-2 parts of antioxidants.

[0032] Furthermore, the antioxidants include, but are not limited to, at least one of p-hydroxyacetophenone, vitamin E, and vitamin C.

[0033] Furthermore, the physical sunscreen also contains 0.001-1 part of a chelating agent.

[0034] Furthermore, the chelating agent.

[0035] Furthermore, the chelating agent is ethylenediaminetetraacetic acid salt.

[0036] The physical sunscreen agent of this application requires the combined use of titanium dioxide and zinc oxide. Titanium dioxide is more effective in protecting against UVB, while zinc oxide is more effective in protecting against UVA. Using them together achieves better simultaneous protection against both UVA and UVB. To ensure stable use of the powder, this application first optimizes the emulsifier, including the main emulsifier comprising 0.1-2 parts polysorbate-80, 0-1.5 parts polyglycerol-10 stearate, 1-2 parts glyceryl stearate (and) PEG-100 stearate, 1-2 parts cetearyl alcohol (and) cetearyl glucoside, and 0-1 part polyglycerol-3 distearate (and) glyceryl stearate citrate. These, along with a co-emulsifier, form a structurally stable oil-in-water system. Combined with the powder grinding process, this better wets and disperses the powder, reducing powder aggregation. Furthermore, the combination of these emulsifiers also improves the product's water resistance, further enhancing the maintenance of the sunscreen effect. The use of the thickeners described above, along with the emulsifiers and co-emulsifiers, generates suitable intermolecular forces and cross-linking states, ensuring that the physical sunscreens remain in a uniform and stable suspension state, thereby improving the stability of the formulation and the sun protection effect.

[0037] Secondly, this application also provides a method for preparing the water-in-oil type high-SPF pure physical sunscreen lotion, wherein the preparation method is as follows: after mixing the emulsifier, polyhydroxystearic acid, butyl octyl salicylate and physical sunscreen powder, the mixture is passed through a three-roll mill and then mixed with other ingredients.

[0038] Preferably, the preparation method of the water-in-oil type high-SPF pure physical sunscreen emulsion includes the following steps:

[0039] S1. Homogenize bentonite, ammonium acryloyl dimethyl taurate / VP copolymer and an appropriate amount of deionized water to obtain mixed liquid A1; then use deionized water to prepare styrene / acrylate copolymer into aqueous solution A2; mix A1, A2, chelating agent, pentylene glycol, glycerol and glycerol polyether-26 evenly at 80-85℃ to obtain liquid A3.

[0040] S2. Mix physical sunscreen powder, suspending agent, polyglycerol-2 triisostearate, polyhydroxystearic acid, and an appropriate amount of butyloctyl salicylate, pass through a three-roll mill to obtain C1, and add C1 to B1 for homogenization.

[0041] S3. Mix the main emulsifier, VP / eicosene copolymer, octyl polymethylsiloxane, neopentyl glycol dioctyl ester / didecanoate, octyl acid / decanoic acid triglyceride, the balance butyl octyl salicylate, and ethylhexyl glycerol, stir and heat to obtain liquid B1.

[0042] S4. Homogenize A3 at 80-85℃, slowly add the homogenized solutions of C1 and B1, and continue homogenizing.

[0043] S5. Cool to 70-75℃, add the remaining thickeners to S4, and homogenize.

[0044] S6. Cool to 55-60℃, add antioxidant, butanediol, and remaining water and stir, then add polydimethylsiloxane and homogenize.

[0045] S7, cooling, defoaming, and discharging.

[0046] Beneficial effects

[0047] 1. The sunscreen lotion of this application is a water-in-oil system containing a large amount of physical sunscreen agents, which not only has a refreshing texture, but also has a strong sun protection effect;

[0048] 2. This application optimizes the dosage of components such as main emulsifier, co-emulsifier, thickener, and film-forming agent, so that the physical sunscreen powder is more evenly dispersed in the system, further improving the sun protection effect and enhancing the product's water resistance;

[0049] 3. The product ingredients in this application are safe, have good sun protection effect, and take effect immediately after application without waiting, which is very convenient. Attached Figure Description

[0050] Appendix Figure 1 Example 2: SPF and PA value test report of the product. Detailed Implementation

[0051] Example

[0052] Example 1

[0053] This embodiment provides a water-in-oil type high-SPF pure physical sunscreen emulsion; based on a total weight of 100 parts, the components of the water-in-oil type high-SPF pure physical sunscreen emulsion include: 18 parts physical sunscreen powder, 3 parts thickener, 5 parts main emulsifier, 0.9 parts co-emulsifier, 5.05 parts moisturizer, 4 parts film-forming agent, 18.3 parts skin moisturizer, 1 part suspending agent, 0.5 parts antioxidant, 0.05 parts chelating agent, and deionized water to make up the balance.

[0054] The physical sunscreen powder is a mixture of zinc oxide and titanium dioxide in a weight ratio of 1:2. The zinc oxide and titanium dioxide are inorganic silicon-surface-treated mixed powders purchased from Tayca Corporation.

[0055] The thickener is: 1.5 parts bentonite, 0.1 parts ammonium acryloyl dimethyl taurate / VP copolymer, 1.4 parts hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (and) water (and) squalane (brand name: SIMULGE NS).

[0056] The main emulsifier is: 2 parts polysorbate-80, 2 parts glyceryl stearate (and) PEG-100 stearate, and 1 part cetearyl alcohol (and) cetearyl glucoside.

[0057] The co-emulsifier is 0.9 parts of polyglycerol-2 triisostearate.

[0058] The moisturizer consists of: 2 parts butylene glycol, 1 part pentylene glycol, 1 part glycerin, 1 part glycerin polyether-26, and 0.05 parts ethylhexylglycerin.

[0059] The film-forming agent is: 3.0 parts styrene / acrylate copolymer and 1 part VP / eicosene copolymer.

[0060] The emollient comprises 5 parts neopentyl glycol dioctyl ester / didecanoate, 4 parts polydimethylsiloxane, 2 parts octyl polymethylsiloxane, 0.3 parts polyhydroxystearic acid, and 7 parts butyl octyl salicylate.

[0061] The suspending agent is polymethylsilsesquioxane.

[0062] The antioxidant is p-hydroxyacetophenone.

[0063] The chelating agent is sodium ethylenediaminetetraacetate.

[0064] The preparation method of the water-in-oil type high-SPF pure physical sunscreen is as follows:

[0065] S1. Bentonite, ammonium acryloyl dimethyl taurate / VP copolymer and 15 parts of deionized water were homogenized at 5000 r / min for 10 min to obtain mixed liquid A1; styrene / acrylate copolymer was prepared into aqueous solution A2 using deionized water at 55℃; A1, A2, chelating agent, pentylene glycol, glycerol and glycerol polyether-26 were mixed evenly at 83℃ to obtain liquid A3;

[0066] S2. Mix the physical sunscreen powder, suspending agent, polyglycerol-2 triisostearate, polyhydroxystearic acid, and an appropriate amount of butyloctyl salicylate, and pass the mixture through a three-roll mill three times to obtain C1; add C1 to B1 at 83°C and homogenize at 5000 r / min for 5 min; the appropriate amount is the minimum amount that can just wet all the powders.

[0067] S3. Mix the main emulsifier, VP / eicosene copolymer, octyl polymethylsiloxane, neopentyl glycol dioctyl ester / didecanoate, octyl acid / decanoic acid triglyceride, balance butyl octyl salicylate, and ethylhexyl glycerol, stir and heat to 83°C to obtain liquid B1.

[0068] S4. Homogenize A3 at 83℃ and 5000r / min, slowly add the homogenized liquid of C1 and B1 to it, and continue homogenizing for 6min.

[0069] S5. Cool down to 75℃, add the remaining thickeners to S4, and homogenize at 5800r / min for 4min.

[0070] S6. Cool down to 60℃, add antioxidant, butanediol and remaining water and stir, then add polydimethylsiloxane and homogenize at 5000r / min for 4min;

[0071] S7. Cool down to below 37℃, defoam, and discharge.

[0072] Example 2

[0073] This embodiment provides a water-in-oil type high-SPF pure physical sunscreen emulsion; based on a total weight of 100 parts, the components of the water-in-oil type high-SPF pure physical sunscreen emulsion include: 18 parts physical sunscreen powder, 2.1 parts thickener, 4.2 parts main emulsifier, 0.9 parts co-emulsifier, 5.05 parts moisturizer, 4 parts film-forming agent, 18.3 parts skin moisturizer, 1 part suspending agent, 0.5 parts antioxidant, 0.05 parts chelating agent, and deionized water to make up the balance.

[0074] The physical sunscreen powder is a mixture of zinc oxide and titanium dioxide in a weight ratio of 1:2. The zinc oxide and titanium dioxide are inorganic silicon-surface-treated mixed powders purchased from Tayca Corporation.

[0075] The thickener is: 1.5 parts bentonite, 0.1 parts ammonium acryloyldimethyl taurate / VP copolymer, 0.3 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (and) water (and) squalane (brand name: SIMULGE NS), and 0.2 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (brand name: EMT 10).

[0076] The main emulsifier is: 0.7 parts polysorbate-80, 1.8 parts glyceryl stearate (and) PEG-100 stearate, 0.7 parts polyglyceryl-10 stearate, and 1 part cetearyl alcohol (and) cetearyl glucoside.

[0077] The co-emulsifier is 0.9 parts of polyglycerol-2 triisostearate.

[0078] The moisturizer consists of: 2 parts butylene glycol, 1 part pentylene glycol, 1 part glycerin, 1 part glycerin polyether-26, and 0.05 parts ethylhexylglycerin.

[0079] The film-forming agent is: 3.0 parts styrene / acrylate copolymer and 1 part VP / eicosene copolymer.

[0080] The emollient comprises 5 parts neopentyl glycol dioctyl ester / didecanoate, 4 parts polydimethylsiloxane, 2 parts octyl polymethylsiloxane, 0.3 parts polyhydroxystearic acid, and 7 parts butyl octyl salicylate.

[0081] The suspending agent is polymethylsilsesquioxane.

[0082] The antioxidant is p-hydroxyacetophenone.

[0083] The chelating agent is sodium ethylenediaminetetraacetate.

[0084] The preparation method of the water-in-oil type high-SPF pure physical sunscreen is the same as in Example 1.

[0085] Example 3

[0086] This embodiment provides a water-in-oil type high-SPF pure physical sunscreen emulsion; based on a total weight of 100 parts, the components of the water-in-oil type high-SPF pure physical sunscreen emulsion include: 18 parts physical sunscreen powder, 2.1 parts thickener, 4.8 parts main emulsifier, 0.9 parts co-emulsifier, 5.05 parts moisturizer, 4 parts film-forming agent, 18.3 parts skin moisturizer, 1 part suspending agent, 0.5 parts antioxidant, 0.05 parts chelating agent, and deionized water to make up the balance.

[0087] The physical sunscreen powder is a mixture of zinc oxide and titanium dioxide in a weight ratio of 1:2. The zinc oxide and titanium dioxide are inorganic silicon-surface-treated mixed powders purchased from Tayca Corporation.

[0088] The thickener is: 1.5 parts bentonite, 0.1 parts ammonium acryloyldimethyl taurate / VP copolymer, 0.3 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (and) water (and) squalane (brand name: SIMULGE NS), and 0.2 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (brand name: EMT 10).

[0089] The main emulsifier is: 1.8 parts glyceryl stearate (and) PEG-100 stearate, 2 parts cetearyl alcohol (and) cetearyl glucoside, and 1 part polyglycerol-3 distearate (and) glyceryl stearate citrate.

[0090] The co-emulsifier is 0.9 parts of polyglycerol-2 triisostearate.

[0091] The moisturizer consists of: 2 parts butylene glycol, 1 part pentylene glycol, 1 part glycerin, 1 part glycerin polyether-26, and 0.05 parts ethylhexylglycerin.

[0092] The film-forming agent is: 3.0 parts styrene / acrylate copolymer and 1 part VP / eicosene copolymer.

[0093] The emollient comprises 5 parts neopentyl glycol dioctyl ester / didecanoate, 4 parts polydimethylsiloxane, 2 parts octyl polymethylsiloxane, 0.3 parts polyhydroxystearic acid, and 7 parts butyl octyl salicylate.

[0094] The suspending agent is polymethylsilsesquioxane.

[0095] The antioxidant is p-hydroxyacetophenone.

[0096] The chelating agent is sodium ethylenediaminetetraacetate.

[0097] The preparation method of the water-in-oil type high-SPF pure physical sunscreen is the same as in Example 1.

[0098] Example 4

[0099] This embodiment provides a water-in-oil type high-SPF pure physical sunscreen emulsion; based on a total weight of 100 parts, the components of the water-in-oil type high-SPF pure physical sunscreen emulsion include: 18 parts physical sunscreen powder, 3.5 parts thickener, 4.2 parts main emulsifier, 0.9 parts co-emulsifier, 5.05 parts moisturizer, 4 parts film-forming agent, 18.3 parts skin moisturizer, 1 part suspending agent, 0.5 parts antioxidant, 0.05 parts chelating agent, and deionized water to make up the balance.

[0100] The physical sunscreen powder is a mixture of zinc oxide and titanium dioxide in a weight ratio of 1:2. The zinc oxide and titanium dioxide are a mixture of zinc oxide and titanium dioxide powders that have undergone amino acid surface treatment and were purchased from Tayca Corporation.

[0101] The thickener is: 2 parts bentonite, 0.1 parts ammonium acryloyl dimethyl taurate / VP copolymer, 1.4 parts hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (and) water (and) squalane (brand name: SIMULGE NS).

[0102] The main emulsifier is: 0.7 parts polysorbate-80, 1.8 parts glyceryl stearate (and) PEG-100 stearate, 0.7 parts polyglyceryl-10 stearate, and 1 part cetearyl alcohol (and) cetearyl glucoside.

[0103] The co-emulsifier is 0.9 parts of polyglycerol-2 triisostearate.

[0104] The moisturizer consists of: 2 parts butylene glycol, 1 part pentylene glycol, 1 part glycerin, 1 part glycerin polyether-26, and 0.05 parts ethylhexylglycerin.

[0105] The film-forming agent is: 3.0 parts styrene / acrylate copolymer and 1 part VP / eicosene copolymer.

[0106] The emollient comprises 5 parts neopentyl glycol dioctyl ester / didecanoate, 4 parts polydimethylsiloxane, 2 parts octyl polymethylsiloxane, 0.3 parts polyhydroxystearic acid, and 7 parts butyl octyl salicylate.

[0107] The suspending agent is polymethylsilsesquioxane.

[0108] The antioxidant is p-hydroxyacetophenone.

[0109] The chelating agent is sodium ethylenediaminetetraacetate.

[0110] The preparation method of the water-in-oil type high-SPF pure physical sunscreen is the same as in Example 1.

[0111] Example 5

[0112] This embodiment provides a water-in-oil type high-SPF pure physical sunscreen emulsion; based on a total weight of 100 parts, the components of the water-in-oil type high-SPF pure physical sunscreen emulsion include: 18 parts physical sunscreen powder, 2.1 parts thickener, 4.2 parts main emulsifier, 0.9 parts co-emulsifier, 5.05 parts moisturizer, 4 parts film-forming agent, 18.3 parts skin moisturizer, 1 part suspending agent, 0.5 parts antioxidant, 0.05 parts chelating agent, and deionized water to make up the balance.

[0113] The physical sunscreen powder is a mixture of zinc oxide and titanium dioxide in a weight ratio of 1:2. The zinc oxide and titanium dioxide are a mixture of zinc oxide and titanium dioxide powders that have undergone amino acid surface treatment and were purchased from Tayca Corporation.

[0114] The thickener is: 1.5 parts bentonite, 0.1 parts ammonium acryloyldimethyl taurate / VP copolymer, 0.3 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (and) water (and) squalane (brand name: SIMULGE NS), and 0.2 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (brand name: EMT 10).

[0115] The main emulsifier is: 0.7 parts polysorbate-80, 1.8 parts glyceryl stearate (and) PEG-100 stearate, 0.7 parts polyglyceryl-10 stearate, and 1 part cetearyl alcohol (and) cetearyl glucoside.

[0116] The co-emulsifier is 0.9 parts of polyglycerol-2 triisostearate.

[0117] The moisturizer consists of: 2 parts butylene glycol, 1 part pentylene glycol, 1 part glycerin, 1 part glycerin polyether-26, and 0.05 parts ethylhexylglycerin.

[0118] The film-forming agent is: 3.0 parts styrene / acrylate copolymer and 1 part VP / eicosene copolymer.

[0119] The emollient comprises 5 parts caprylic / capric triglyceride, 4 parts polydimethylsiloxane, 2 parts octyl polymethylsiloxane, 0.3 parts polyhydroxystearic acid, and 7 parts butyl octyl salicylate.

[0120] The suspending agent is polymethylsilsesquioxane.

[0121] The antioxidant is p-hydroxyacetophenone.

[0122] The chelating agent is sodium ethylenediaminetetraacetate.

[0123] The preparation method of the water-in-oil type high-SPF pure physical sunscreen is basically the same as that in Example 1, except that the neopentyl glycol dioctanoate / didecanoate is replaced with caprylic acid / decanoic acid triglyceride.

[0124] Example 6

[0125] This embodiment provides a water-in-oil type high-SPF pure physical sunscreen emulsion; based on a total weight of 100 parts, the components of the water-in-oil type high-SPF pure physical sunscreen emulsion include: 18 parts physical sunscreen powder, 2.1 parts thickener, 4.2 parts main emulsifier, 0.9 parts co-emulsifier, 5.05 parts moisturizer, 4 parts film-forming agent, 14.3 parts skin moisturizer, 1 part suspending agent, 0.5 parts antioxidant, 0.05 parts chelating agent, and deionized water to make up the balance.

[0126] The physical sunscreen powder is a mixture of zinc oxide and titanium dioxide in a weight ratio of 1:2. The zinc oxide and titanium dioxide are a mixture of zinc oxide and titanium dioxide powders that have undergone amino acid surface treatment and were purchased from Tayca Corporation.

[0127] The thickener is: 1.5 parts bentonite, 0.1 parts ammonium acryloyldimethyl taurate / VP copolymer, 0.3 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (and) water (and) squalane (brand name: SIMULGE NS), and 0.2 parts hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer (and) polysorbate-60 (and) sorbitan isostearate (brand name: EMT 10).

[0128] The main emulsifier is: 0.7 parts polysorbate-80, 1.8 parts glyceryl stearate (and) PEG-100 stearate, 0.7 parts polyglyceryl-10 stearate, and 1 part cetearyl alcohol (and) cetearyl glucoside.

[0129] The co-emulsifier is 0.9 parts of polyglycerol-2 triisostearate.

[0130] The moisturizer consists of: 2 parts butylene glycol, 1 part pentylene glycol, 1 part glycerin, 1 part glycerin polyether-26, and 0.05 parts ethylhexylglycerin.

[0131] The film-forming agent is: 3.0 parts styrene / acrylate copolymer and 1 part VP / eicosene copolymer.

[0132] The emollient comprises 5 parts neopentyl glycol dioctanoate / didecanoate, 2 parts octyl polymethylsiloxane, 0.3 parts polyhydroxystearic acid, and 7 parts butyl octyl salicylate.

[0133] The suspending agent is polymethylsilsesquioxane.

[0134] The antioxidant is p-hydroxyacetophenone.

[0135] The chelating agent is sodium ethylenediaminetetraacetate.

[0136] The preparation method of the water-in-oil type high-SPF pure physical sunscreen is the same as in Example 1.

[0137] Performance testing methods:

[0138] 1. Stability Test: The products of Example 2 above were stored for one month at high temperature (48℃), low temperature (-18℃), and high-low temperature cycling (48℃, 25℃, 4℃, -18℃, 24 hours at each temperature); and for three months at room temperature (25℃), near-low temperature (4℃), and near-high temperature (40℃). After storage, the products were cooled to room temperature, and the presence of any adverse phenomena such as stratification, aggregation into particles, precipitation, or discoloration was observed. If no adverse phenomena were observed, the stability test was considered passed; otherwise, it was considered failed. The results are shown in Table 1.

[0139] Table 1

[0140] One month storage pass pass pass stability 25℃ 4℃ 40℃ Three months of storage pass pass pass

[0141] 2. Sunscreen efficacy test: The SPF and PA values ​​of the human body were tested. The test report for the product in Example 2 is attached. Figure 1 The data results are shown in Table 2.

[0142] Table 2

[0143] SPF 50 PA ≥9.19

[0144] 3. Skin feel:

[0145] Sensory evaluation method test:

[0146] (1) Firmness: Twenty volunteers were selected to assess the firmness (hardness) of the product before use; the lower the firmness, the softer the product feels to the skin. The scoring levels were: relatively firm - 10-15 points; slightly firm or no firmness - 7-9 points; 1-6 points - relatively soft; the average score was taken.

[0147] Results: Example 3 scored 13 points, Example 2 scored 10 points, and Example 1 scored 7 points.

[0148] (2) Refreshing feeling; 20 volunteers were selected to observe the degree of refreshing or oily feeling produced by the oil on the skin when the product was applied and after application. The scoring level was: relatively refreshing - 10-15 points; slightly refreshing or neither refreshing nor oily - 7-9 points; 1-6 points - relatively oily; the final score was the average.

[0149] Results: Example 4 scored 7 points, Example 2 scored 11 points, and Example 1 scored 3 points.

[0150] (3) Lightness: Twenty volunteers were selected to observe the breathability of the skin when the product was applied and after application. The scoring level was as follows: relatively light - 10-15 points; slightly light or neither light nor heavy - 7-9 points; relatively heavy - 1-6 points; and the average score was taken.

[0151] Results: Example 2 scored 11 points, and Example 5 scored 7 points.

[0152] (4) Spreadability: 20 volunteers were selected to experience how easy the composition was to spread on the skin on the first time. The scoring levels were: easy to spread - 10-15 points; slightly easy to spread or with a little resistance - 7-9 points; relatively difficult to spread - 1-6 points; the average score was taken.

[0153] Results: Example 2 scored 11 points, and Example 6 scored 5 points.

Claims

1. A water-in-oil type high-SPF pure physical sunscreen lotion, characterized in that, Based on a total weight of 100 parts, the ingredients of the water-in-oil type high-SPF pure physical sunscreen emulsion include: 18 parts physical sunscreen powder, 2.1 parts thickener, 4.2 parts main emulsifier, 0.9 parts co-emulsifier, 5.05 parts moisturizer, 4 parts film-forming agent, 18.3 parts skin moisturizer, 1 part suspending agent, 0.5 parts antioxidant, 0.05 parts chelating agent, and deionized water to make up the balance; The physical sunscreen powder is a mixture of zinc oxide and titanium dioxide in a weight ratio of 1:2, wherein the zinc oxide and titanium dioxide are a mixture of zinc oxide and titanium dioxide that have undergone inorganic silicon surface treatment. The thickener is: 1.5 parts bentonite; 0.1 parts ammonium acryloyl dimethyl taurate / VP copolymer; 0.3 parts hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, polysorbate-60, sorbitan isostearate, water, and squalane; 0.2 parts hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer, polysorbate-60, and sorbitan isostearate. The main emulsifier is: 0.7 parts polysorbate-80, 1.8 parts glyceryl stearate and PEG-100 stearate, 0.7 parts polyglyceryl-10 stearate, 1 part cetearyl alcohol and cetearyl glucoside; The co-emulsifier is: 0.9 parts of polyglycerol-2 triisostearate; The moisturizer is: 2 parts butylene glycol, 1 part pentanediol, 1 part glycerin, 1 part glycerin polyether-26, and 0.05 parts ethylhexylglycerin; The film-forming agent is: 3.0 parts styrene / acrylate copolymer and 1 part VP / eicosene copolymer; The emollient comprises 5 parts neopentyl glycol dioctyl ester / didecanoate, 4 parts polydimethylsiloxane, 2 parts octyl polymethylsiloxane, 0.3 parts polyhydroxystearic acid, and 7 parts butyl octyl salicylate. The suspending agent is polymethylsilsesquioxane; The antioxidant is p-hydroxyacetophenone; The chelating agent is sodium ethylenediaminetetraacetate; The preparation method of the pure physical sunscreen lotion is as follows: after mixing the emulsifier, polyhydroxystearic acid, butyl octyl salicylate and physical sunscreen powder, the mixture is passed through a three-roll mill and then mixed with other ingredients.

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