Physical sunscreen composite powder, powdery sunscreen cosmetic and preparation method
By using oil and fat cosmetic raw materials to coat physical sunscreens in powder sunscreen cosmetics, the problem of physical sunscreens being difficult to disperse evenly in powder sunscreen cosmetics is solved, and the sunscreen effect and safety are significantly improved.
Patent Information
- Application Number
- CN202411840362.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-03-11
AI Technical Summary
Among existing powder sunscreen cosmetics, physical sunscreens are difficult to disperse evenly, resulting in lower sunscreen effects.
The physical sunscreen is coated with oil and fat cosmetic raw materials. The melting point range of oil and fat cosmetic raw materials is 35~37℃, and melted on the skin surface to form a film to assist the dispersed coating of physical sunscreen.
Improve the dispersion uniformity and sun protection effect of physical sunscreen agents such as nano titanium dioxide in powder sunscreen cosmetics, providing better safety and sun protection performance.
Smart Images
Figure CN119587392A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of sunscreen technology, and in particular relates to a physical sunscreen composite powder and powder-based sunscreen cosmetics and a preparation method thereof. Background Art
[0002] As consumers' awareness of sun protection gradually increases, the safety of sunscreen cosmetics has received more and more attention; the sunscreen functional ingredients in sunscreen cosmetics are mainly divided into chemical sunscreens and physical sunscreens. Physical sunscreens are mainly nanoparticles such as nano-titanium dioxide and nano-zinc oxide. Nanoparticles such as nano-titanium dioxide and nano-zinc oxide reflect and scatter ultraviolet rays, thereby physically shielding them and exerting a physical sunscreen effect. At the same time, physical sunscreens remain on the skin surface and will not be absorbed by the skin. Physical sunscreens are relatively safe.
[0003] In addition to the safety of sunscreen cosmetics, the sunscreen effect of sunscreen cosmetics is also highly valued; physical sunscreens such as nano titanium dioxide and nano zinc oxide are added to sunscreen cosmetics such as sunscreen lotions. After makeup is applied, the dispersion medium in sunscreen cosmetics such as sunscreen lotions will fully disperse physical sunscreens such as nano titanium dioxide and nano zinc oxide on the face. Physical sunscreens can fully reflect and scatter ultraviolet rays and play a physical shielding role. Therefore, the sunscreen value of sunscreen products such as sunscreen lotions containing physical sunscreens is generally higher; unlike sunscreen cosmetics such as sunscreen lotions, powder sunscreen cosmetics such as sunscreen powder and sunscreen loose powder are particulate matter and require makeup tools such as powder puffs to apply better. Moreover, after makeup is applied, due to the absence of a dispersion medium, the physical sunscreen in the sunscreen powder and sunscreen loose powder cannot form a uniform protective layer. Therefore, the sunscreen value of powder sunscreen cosmetics is generally low after relative testing.
[0004] By improving the uniformity of dispersion of physical sunscreens such as nano titanium dioxide and nano zinc oxide in sunscreen pressed powder and loose powder after application, and applying them more evenly on the face and other skin surfaces, it is expected to provide powder sunscreen cosmetics with better safety and sunscreen effects, thus meeting consumers' sunscreen needs. Summary of the invention
[0005] In view of this, the present application provides a physical sunscreen composite powder and powder sunscreen cosmetics and a preparation method, which are used to solve the technical problems in the prior art that physical sunscreen agents are difficult to disperse evenly and have low sunscreen effects.
[0006] The first aspect of the present application provides a physical sunscreen composite powder, the composition of the physical sunscreen composite powder includes: a physical sunscreen agent and oil-based cosmetic raw materials;
[0007] The oil-based cosmetic raw material encapsulates the physical sunscreen;
[0008] The melting point range of the oil-based cosmetic raw material is 35-37°C.
[0009] Preferably, the oil-based cosmetic raw material is selected from at least one of mineral oils, synthetic oils and natural oils.
[0010] Preferably, the oil-based cosmetic raw material is at least one selected from hydrogenated coconut glyceride, hydrogenated palm kernel oil, cocoa butter, and C20-24 alkyl polydimethylsiloxane.
[0011] Preferably, the physical sunscreen is selected from at least one of nano titanium oxide and nano zinc oxide.
[0012] Preferably, in the physical sunscreen composite powder, the mass ratio of the physical sunscreen agent to the oil-based cosmetic raw material is 12:5-10.
[0013] The second aspect of the present application provides a method for preparing a physical sunscreen composite powder, which can be used to prepare the physical sunscreen composite powder described in the first aspect. The preparation method comprises the steps of:
[0014] Step A1, adding a physical sunscreen and a fat-based cosmetic raw material into a volatile organic solvent and mixing them evenly to obtain a physical sunscreen solution;
[0015] Step A2, drying the volatile organic solvent in the physical sunscreen solution, and cooling to room temperature to obtain a physical sunscreen composite powder block;
[0016] Step A3, crushing the physical sunscreen composite powder block to obtain a physical sunscreen composite powder.
[0017] Preferably, the volatile organic solvent is selected from at least one of ethanol, isopropanol and isododecane.
[0018] Preferably, the drying temperature is 35-60°C.
[0019] The third aspect of the present application provides a powder sunscreen cosmetic, which comprises: the physical sunscreen composite powder described in the first aspect or the second aspect, a chemical sunscreen, a colorant, a preservative, a methyl methacrylate cross-linked polymer, silica, boron nitride and mica.
[0020] Preferably, the chemical sunscreen is selected from at least one of octocrylene, ethylhexyl methoxycinnamate, ethylhexyl salicylate, and bis-ethylhexyloxyphenol methoxyphenyl triazine;
[0021] The colorant is selected from at least one of CI77491, CI77492, and CI77499;
[0022] The preservative is selected from at least one of phenoxyethanol and ethylhexylglycerin.
[0023] Preferably, calculated in parts by mass, the composition of the powder sunscreen cosmetic includes: 12 parts by mass of physical sunscreen composite powder, 2 to 7 parts by mass of octocrylene, 5 to 15 parts by mass of ethylhexyl methoxycinnamate, 2 to 7 parts by mass of ethylhexyl salicylate, 2 to 7 parts by mass of bis-ethylhexyloxyphenol methoxyphenyl triazine, 0.05 to 0.2 parts by mass of CI77491, 0.05 to 0.2 parts by mass of CI77492, 0.05 to 0.2 parts by mass of CI77499, 0.2 to 1 parts by mass of phenoxyethanol, 0.5 to 2 parts by mass of ethylhexylglycerin, 2 to 6 parts by mass of methyl methacrylate crosslinked polymer, 13 to 31 parts by mass of silica, 4 to 5 parts by mass of boron nitride and 16 to 40 parts by mass of mica.
[0024] The fourth aspect of the present application provides a method for preparing a powder sunscreen cosmetic, which can be used to prepare the powder sunscreen cosmetic described in the third aspect. The preparation method comprises the steps of:
[0025] Step B1, stirring and evenly dispersing methyl methacrylate cross-linked polymer, silica, boron nitride and mica to obtain a phase A dispersed component;
[0026] Step B2, adding a colorant and a preservative to the dispersed component of phase A and stirring and dispersing the mixture uniformly to obtain a mixed dispersed component of phase AB;
[0027] Step B3, adding the physical sunscreen composite powder and chemical sunscreen described in the first aspect or the second aspect to the AB phase mixed and dispersed components, stirring and dispersing them evenly, and freeze-drying to obtain a loose powder sunscreen cosmetic.
[0028] Preferably, after step B3, the method further comprises step B4 of pressing the powder sunscreen cosmetic into a shape to obtain a powder sunscreen cosmetic in the form of a pressed powder.
[0029] The fifth aspect of the present application provides the use of the physical sunscreen composite powder described in the first aspect or the second aspect in the preparation of powder sunscreen cosmetics.
[0030] Preferably, the application is specifically: application of the physical sunscreen composite powder in the preparation of sunscreen pressed powder or sunscreen loose powder. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0032] Figure 1These are the SPF sun protection factor test results of the sunscreen loose powder provided in Example 1 and Comparative Example 1 of the present application.
[0033] Figure 2 This is a graph showing the SPF sun protection factor test results of the sunscreen powder provided in Example 2 and Comparative Examples 2-6 of the present application. DETAILED DESCRIPTION
[0034] The present application provides a physical sunscreen composite powder and powder sunscreen cosmetics and a preparation method, which are used to solve the technical problems in the prior art that physical sunscreen agents are difficult to disperse evenly and have low sunscreen effects.
[0035] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.
[0036] In view of the fact that physical sunscreen agents such as nano titanium dioxide and nano zinc oxide are currently added to powder sunscreen cosmetics such as sunscreen powder cakes and sunscreen loose powders, it is difficult to disperse them evenly after applying them, and they cannot be well applied to the skin surface such as the face, resulting in a low sunscreen effect; the present application provides a physical sunscreen composite powder; the physical sunscreen composite powder comprises a physical sunscreen agent and a fat cosmetic raw material, the fat cosmetic raw material coating the physical sunscreen agent; the fat cosmetic raw material has a melting point range of 35-37°C, is solid at room temperature, and after applying makeup to the skin surface such as the face, the temperature of the skin surface such as the face The melting point of the oil-based cosmetic raw materials is just within the melting point range of the oil-based cosmetic raw materials, which allows the oil-based cosmetic raw materials to melt into a film, assisting the physical sunscreen agent in dispersing and coating on the skin surface, and promoting the physical sunscreen agent to be evenly and continuously dispersed on the face and other skin surfaces. By using oil-based cosmetic raw materials with a melting point range of 35~37°C to encapsulate the physical sunscreen agent, the sunscreen effect of physical sunscreen agents such as nano titanium dioxide and nano zinc oxide after being added to powder sunscreen cosmetics is improved, thereby overcoming the current defects of physical sunscreen agents that are difficult to disperse evenly after applying makeup, cannot be well coated on the face and other skin surfaces, and have a low sunscreen effect.
[0037] As a preferred technical solution, for the types of oily cosmetic raw materials, in a physical sunscreen composite powder provided in the present application, the oily cosmetic raw materials can be selected from mineral oils, synthetic oils or natural oils; for example, oily cosmetic raw materials such as hydrogenated coconut oil glyceride.
[0038] Correspondingly, the present application provides a corresponding preparation method for a physical sunscreen composite powder, the preparation method comprising: adding a physical sunscreen agent and oil-based cosmetic raw materials into an organic solvent, mixing them evenly and then drying them, cooling them to room temperature to obtain a block-shaped physical sunscreen composite powder block, and then crushing them to obtain a physical sunscreen composite powder.
[0039] As a preferred technical solution, in the process of drying volatile organic solvents, in order to speed up the drying speed, the drying temperature can be slightly higher than the melting point of the oily cosmetic raw materials, but should not exceed the boiling point of the oily cosmetic raw materials. The drying temperature range in this application is 37~80℃.
[0040] Correspondingly, the present application also provides powder sunscreen cosmetics, which are obtained by compounding the aforementioned physical sunscreen composite powder, chemical sunscreen, colorant, preservative, methyl methacrylate cross-linked polymer, silica, boron nitride and mica; the powder sunscreen cosmetics can be sunscreen loose powder or sunscreen pressed powder.
[0041] The present application also provides a method for preparing powder-based sunscreen makeup such as loose powder and pressed powder, which comprises first uniformly mixing ingredients such as physical sunscreen composite powder, chemical sunscreen agent, colorant, preservative, methyl methacrylate cross-linked polymer, silica, boron nitride and mica, and then freeze-drying to obtain loose sunscreen powder, which is then pressed to obtain pressed powder.
[0042] Example 1
[0043] Embodiment 1 of the present application provides a method for preparing a sunscreen loose powder, the preparation method comprising:
[0044] The weighing step includes: weighing 40g of methyl methacrylate cross-linked polymer, 310g of silica, 50g of boron nitride and 160g of mica as phase A components, weighing 1g of CI 77491, 1g of CI 77492 and 1g of CI 77499 as phase B components, weighing 6g of phenoxyethanol, 10g of ethylhexylglycerin, 50g of octocrylene, 100g of ethylhexyl methoxycinnamate, 50g of ethylhexyl salicylate and 50g of bis-ethylhexyloxyphenol methoxyphenyl triazine as phase C components, and weighing an appropriate amount of isopropyl alcohol, 120g of nano titanium oxide physical sunscreen and 70g of hydrogenated coconut oil glyceride as phase D components.
[0045] The preparation steps of the physical sunscreen composite powder include: adding 120g of nano titanium oxide physical sunscreen agent (particle size 35-40nm) and 70g of hydrogenated coconut oil glyceride to 350g of isopropyl alcohol and mixing evenly, then putting it into a 37°C oven to dry the isopropyl alcohol, cooling it to room temperature to obtain a physical sunscreen composite powder block, and then crushing the physical sunscreen composite powder block to obtain a physical sunscreen composite powder, and controlling the particle size distribution of the physical sunscreen composite powder to be around D50=0.619μm.
[0046] The steps of preparing loose powder sunscreen cosmetics (sunscreen loose powder) include: first adding phase A component into a stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, then adding the pre-dispersed phase B component into the stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, adding the physical sunscreen composite powder and phase C component into the stirring pot, stirring at a speed of 1Krpm for 3 minutes, and then unloading, freeze-drying, sampling and inspection, discharging, canning and packaging.
[0047] Comparative Example 1
[0048] Comparative Example 1 of the present application provides a method for preparing a sunscreen loose powder, the preparation method comprising:
[0049] The weighing step includes: weighing 40g of methyl methacrylate cross-linked polymer, 310g of silica, 50g of boron nitride and 160g of mica as phase A components, weighing 1g of CI77491, 1g of CI77492 and 1g of CI77499 as phase B components, weighing 6g of phenoxyethanol, 10g of ethylhexylglycerin, 50g of octocrylene, 100g of ethylhexyl methoxycinnamate, 50g of ethylhexyl salicylate and 50g of bis-ethylhexyloxyphenol methoxyphenyl triazine as phase C components, and weighing 120g of nano titanium oxide physical sunscreen and 70g of hydrogenated coconut oil glyceride as phase D components.
[0050] The steps of preparing loose powder sunscreen cosmetics (loose sunscreen powder) include: first adding phase A component into a stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, then adding the pre-dispersed phase B component into the stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, then adding phase C component into the stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, then adding phase D component into the stirring pot, stirring at a speed of 1Krpm for 3 minutes, and then unloading, freeze-drying, sampling and inspection, discharge canning and packaging.
[0051] Example 2
[0052] Example 2 of the present application provides a method for preparing a sunscreen powder cake, the preparation method comprising:
[0053] The weighing step includes: weighing 40g of methyl methacrylate cross-linked polymer, 130g of silica, 40g of boron nitride and 400g of mica as phase A components, weighing 1g of CI77491, 1g of CI77492 and 1g of CI77499 as phase B components, weighing 6g of phenoxyethanol, 10g of ethylhexylglycerin, 50g of octocrylene, 100g of ethylhexyl methoxycinnamate, 50g of ethylhexyl salicylate and 50g of bis-ethylhexyloxyphenol methoxyphenyl triazine as phase C components, and weighing an appropriate amount of isopropyl alcohol, 120g of nano titanium oxide physical sunscreen and 70g of hydrogenated coconut oil glyceride as phase D components.
[0054] The preparation steps of the physical sunscreen composite powder include: adding 120g of nano titanium oxide physical sunscreen agent (particle size 35-40nm) and 70g of hydrogenated coconut oil glyceride to 350g of isopropyl alcohol and mixing evenly, then putting it into a 37°C oven to dry the isopropyl alcohol, cooling it to room temperature to obtain a physical sunscreen composite powder block, and then crushing the physical sunscreen composite powder block to obtain a physical sunscreen composite powder, and controlling the particle size distribution of the physical sunscreen composite powder to be around D50=0.619μm.
[0055] The steps of preparing powdered sunscreen cosmetics (sunscreen powder) in the form of a powder cake include: first adding the phase A component into a stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, then adding the pre-dispersed phase B component into the stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, adding the physical sunscreen composite powder and the phase C component into the stirring pot, stirring at a speed of 1Krpm for 3 minutes, and then unloading, freeze-drying and pressing three times at a pressure of 80KG for 4 seconds to form a molding, followed by sampling, inspection, unloading, canning and packaging.
[0056] Comparative Example 2
[0057] Comparative Example 2 of the present application provides a method for preparing a sunscreen powder cake, the preparation method comprising:
[0058] The weighing steps include: weighing 40g of methyl methacrylate cross-linked polymer, 130g of silica, 40g of boron nitride and 400g of mica as phase A components, weighing 1g of CI77491, 1g of CI77492 and 1g of CI77499 as phase B components, weighing 6g of phenoxyethanol, 10g of ethylhexylglycerin, 50g of octocrylene, 100g of ethylhexyl methoxycinnamate, 50g of ethylhexyl salicylate and 50g of bis-ethylhexyloxyphenol methoxyphenyl triazine as phase C components, and weighing 120g of nano titanium oxide physical sunscreen as phase D components.
[0059] The steps of preparing powdered sunscreen cosmetics (sunscreen powder) in the form of a powder cake include: firstly, adding the phase A component into a stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, then adding the pre-dispersed phase B component into the stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, adding the phase D component and the phase C component into the stirring pot, stirring at a speed of 1Krpm for 3 minutes, and then unloading, freeze-drying and pressing three times at a pressure of 80KG for 4 seconds to form a molding, and then sampling, inspection, unloading, canning and packaging.
[0060] Comparative Example 3
[0061] Comparative Example 3 of the present application provides a method for preparing a sunscreen powder cake, the preparation method comprising:
[0062] The weighing step includes: weighing 40g of methyl methacrylate cross-linked polymer, 130g of silica, 40g of boron nitride and 400g of mica as phase A components, weighing 1g of CI77491, 1g of CI77492, and 1g of CI77499 as phase B components, weighing 6g of phenoxyethanol, 10g of ethylhexylglycerin, 50g of octocrylene, 100g of ethylhexyl methoxycinnamate, 50g of ethylhexyl salicylate, and 50g of bis-ethylhexyloxyphenol methoxyphenyl triazine as phase C components, and weighing 70g of hydrogenated coconut oil glyceride as phase D component.
[0063] The steps of preparing powdered sunscreen cosmetics (sunscreen powder) in the form of a powder cake include: firstly, adding the phase A component into a stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, then adding the pre-dispersed phase B component into the stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, adding the phase D component and the phase C component into the stirring pot, stirring at a speed of 1Krpm for 3 minutes, and then unloading, freeze-drying and pressing three times at a pressure of 80KG for 4 seconds to form a molding, and then sampling, inspection, unloading, canning and packaging.
[0064] Comparative Example 4
[0065] Comparative Example 4 of the present application provides a method for preparing a sunscreen powder cake, the preparation method comprising:
[0066] The weighing step includes: weighing 40g of methyl methacrylate cross-linked polymer, 130g of silica, 40g of boron nitride and 400g of mica as phase A components, weighing 1g of CI77491, 1g of CI77492, and 1g of CI77499 as phase B components, weighing 6g of phenoxyethanol, 10g of ethylhexylglycerin, 50g of octocrylene, 100g of ethylhexyl methoxycinnamate, 50g of ethylhexyl salicylate, and 50g of bis-ethylhexyloxyphenol methoxyphenyl triazine as phase C components, and weighing an appropriate amount of isopropyl alcohol, 120g of titanium oxide and 70g of hydrogenated coconut oil glyceride as phase D components.
[0067] The preparation steps of the physical sunscreen composite powder include: adding 120g of nano titanium oxide physical sunscreen agent (particle size 35-40nm) and 70g of hydrogenated coconut oil glyceride to 350g of isopropyl alcohol and mixing evenly, then putting it into a 37°C oven to dry the isopropyl alcohol, cooling it to room temperature to obtain a physical sunscreen composite powder block, and then crushing the physical sunscreen composite powder block to obtain a physical sunscreen composite powder, and controlling the particle size distribution of the physical sunscreen composite powder to be around D50=0.619μm.
[0068] The steps of preparing powdered sunscreen cosmetics (sunscreen powder) in the form of a powder cake include: first adding the phase A component into a stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, then adding the pre-dispersed phase B component into the stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, adding the physical sunscreen composite powder and the phase C component into the stirring pot, stirring at a speed of 1Krpm for 3 minutes, and then unloading, freeze-drying and pressing three times at a pressure of 80KG for 4 seconds to form a molding, followed by sampling, inspection, unloading, canning and packaging.
[0069] Comparative Example 5
[0070] Comparative Example 5 of the present application provides a method for preparing a sunscreen powder cake, the preparation method comprising:
[0071] The weighing step includes: weighing 40g of methyl methacrylate cross-linked polymer, 130g of silica, 40g of boron nitride and 400g of mica as phase A components, weighing 1g of CI77491, 1g of CI77492 and 1g of CI77499 as phase B components, weighing 6g of phenoxyethanol, 10g of ethylhexylglycerin, 50g of octocrylene, 100g of ethylhexyl methoxycinnamate, 50g of ethylhexyl salicylate and 50g of bis-ethylhexyloxyphenol methoxyphenyl triazine as phase C components, and weighing 120g of nano titanium oxide physical sunscreen and 70g of hydrogenated coconut oil glyceride as phase D components.
[0072] The steps of preparing powder sunscreen cosmetics (sunscreen powder) of loose powder include: first adding phase A component to a stirring pot, stirring and dispersing it at a high speed of 3Krpm for 2 minutes, then adding the pre-dispersed phase B component to the stirring pot, stirring and dispersing it at a high speed of 3Krpm for 2 minutes, then adding phase C component to the stirring pot, stirring and dispersing it at a high speed of 3Krpm for 2 minutes, then adding phase D component to the stirring pot, stirring at a speed of 1Krpm for 3 minutes, and then unloading, freeze-drying and pressing three times at a pressure of 80KG for 4 seconds to form, followed by sampling, inspection, unloading, canning and packaging.
[0073] Example 3
[0074] Example 3 of the present application provides a method for preparing a sunscreen powder cake, the preparation method comprising:
[0075] The weighing step includes: weighing 40g of methyl methacrylate cross-linked polymer, 130g of silica, 40g of boron nitride and 400g of mica as phase A components, weighing 1g of CI77491, 1g of CI77492 and 1g of CI77499 as phase B components, weighing 6g of phenoxyethanol, 10g of ethylhexylglycerin, 50g of octocrylene, 100g of ethylhexyl methoxycinnamate, 50g of ethylhexyl salicylate and 50g of bis-ethylhexyloxyphenol methoxyphenyl triazine as phase C components, and weighing an appropriate amount of isopropyl alcohol, 120g of nano titanium oxide physical sunscreen and 70g of C20-24 alkyl polydimethylsiloxane as phase D components.
[0076] The preparation steps of the physical sunscreen composite powder include: adding 120g of nano titanium oxide physical sunscreen agent (particle size 35~40nm) and 70g of C20-24 alkyl polydimethylsiloxane to 350g of isopropyl alcohol and mixing evenly, then putting it into a 37°C oven to dry the isopropyl alcohol, cooling it to room temperature to obtain a physical sunscreen composite powder block, then crushing the physical sunscreen composite powder block to obtain a physical sunscreen composite powder, and controlling the particle size distribution of the physical sunscreen composite powder to be around D50=0.619μm.
[0077] The steps of preparing powdered sunscreen cosmetics (sunscreen powder) in the form of a powder cake include: first adding the phase A component into a stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, then adding the pre-dispersed phase B component into the stirring pot, stirring and dispersing it evenly at a speed of 3Krpm for 2 minutes, adding the physical sunscreen composite powder and the phase C component into the stirring pot, stirring at a speed of 1Krpm for 3 minutes, and then unloading, freeze-drying and pressing three times at a pressure of 80KG for 4 seconds to form a molding, followed by sampling, inspection, unloading, canning and packaging.
[0078] Experimental Example 1
[0079] The present application performs performance tests on the sunscreen loose powder provided in Example 1 and Comparative Example 1, and the sunscreen pressed powder provided in Example 2 and Comparative Examples 2-5. The instrument used in the performance test process is a sun protection factor SPF tester, and the number of tests is 10. For each test, the sunscreen loose powder or sunscreen pressed powder coating plate needs to be kept at a constant temperature of 37° C. for 2 hours to promote the sunscreen loose powder or sunscreen pressed powder containing nano titanium oxide to be dispersed and coated on the surface of the coating plate; wherein, the performance test results of the sunscreen loose powder provided in Example 1 and Comparative Example 1 are shown in Table 1, and the performance test results of the sunscreen pressed powder provided in Example 2 and Comparative Examples 2-5 are shown in Table 2.
[0080] Table 1: 10 SPF test results of sunscreen loose powder provided in Example 1 and Comparative Example 1
[0081]
[0082] Table 2: 10 SPF test results of sunscreen powder provided by Examples 2-3 and Comparative Examples 2-5
[0083]
[0084] Combining Example 2, Comparative Examples 2-5 and Table 2, it can be known that although the sunscreen powder provided in Comparative Example 2 contains the same amount of nano titanium oxide physical sunscreen as Example 2, the sunscreen is significantly lower than that in Example 2. This is because the sunscreen powder provided in Comparative Example 2 does not use hydrogenated coconut oil glyceride to coat the modified nano titanium oxide, so that the nano titanium oxide cannot be fully dispersed and coated on the skin surface such as the face after makeup, and it is difficult to exert the sunscreen effect; while in Example 3, hydrogenated coconut oil glyceride is replaced with C20-24 alkyl polydimethylsiloxane, and the melting point of C20-24 alkyl polydimethylsiloxane is close to that of hydrogenated coconut oil glyceride, which is solid at room temperature and can melt at about 35-37°C, so that C20-24 alkyl polydimethylsiloxane can also coat the modified nano titanium oxide, which promotes the nano titanium oxide to be fully dispersed and coated on the skin surface such as the face after makeup.
[0085] It can be further seen that the sunscreen powder provided in Comparative Example 3 does not contain nano titanium oxide physical sunscreen, and the sunscreen powder provided in Comparative Example 4 contains ordinary titanium oxide without physical sunscreen function, so the sunscreen effect of the sunscreen powder provided in Comparative Examples 3-4 is relatively low; and although the sunscreen powder provided in Comparative Example 5 contains nano titanium oxide physical sunscreen and hydrogenated coconut oil glyceride, the hydrogenated coconut oil glyceride does not pre-coat and modify the nano titanium oxide physical sunscreen, so that the effect of hydrogenated coconut oil glyceride dispersing the nano titanium oxide physical sunscreen into a film after makeup is poor, and the improvement of the sunscreen effect is poor; at the same time, in combination with the embodiment and Comparative Example 1 As can be seen from Table 1, in the sunscreen loose powder, hydrogenated coconut oil glycerides are not used to pre-coat and modify the nano titanium oxide physical sunscreen agent, and the effect of hydrogenated coconut oil glycerides in dispersing the nano titanium oxide physical sunscreen agent into a film after makeup is also poor. This shows that the melting point range of oil cosmetic raw materials such as hydrogenated coconut oil glycerides used in this application is 35~37°C, and they melt into a film after being applied to the face and other skin surfaces, assisting the nano titanium oxide physical sunscreen agent to be dispersed and coated on the skin surface, promoting the physical sunscreen agent to be evenly and continuously dispersed on the face and other skin surfaces, and improving the sunscreen effect of physical sunscreen agents such as nano titanium dioxide after being added to powder sunscreen cosmetics.
[0086] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A physical sunscreen composite powder, characterized in that: include: Physical sunscreens and oil-based cosmetic raw materials; The oil-based cosmetic raw material encapsulates the physical sunscreen; The melting point range of the oil-based cosmetic raw material is 35-37°C.
2. A physical sunscreen composite powder according to claim 1, characterized in that: The oil-based cosmetic raw material is selected from at least one of mineral oil, synthetic oil and natural oil.
3. A physical sunscreen composite powder according to claim 1, characterized in that: The oil-based cosmetic raw material is selected from at least one of hydrogenated coconut glyceride, hydrogenated palm kernel oil, cocoa butter, and C20-24 alkyl polydimethylsiloxane.
4. The physical sunscreen composite powder according to claim 1, characterized in that: The physical sunscreen is selected from at least one of nano titanium oxide and nano zinc oxide.
5. The method for preparing a physical sunscreen composite powder according to any one of claims 1 to 4, characterized in that: Includes steps: Step A1, adding a physical sunscreen and a fat-based cosmetic raw material into a volatile organic solvent and mixing them evenly to obtain a physical sunscreen solution; Step A2, drying the volatile organic solvent in the physical sunscreen solution, and cooling to room temperature to obtain a physical sunscreen composite powder block; Step A3, crushing the physical sunscreen composite powder block to obtain a physical sunscreen composite powder.
6. A powder sunscreen cosmetic, characterized in that: Composition includes: The physical sunscreen composite powder according to any one of claims 1 to 4, a chemical sunscreen, a colorant, a preservative, a methyl methacrylate cross-linked polymer, silica, boron nitride and mica.
7. The method for preparing a powder sunscreen cosmetic according to claim 6, characterized in that: Includes steps: Step B1, stirring and evenly dispersing methyl methacrylate cross-linked polymer, silica, boron nitride and mica to obtain a phase A dispersed component; Step B2, adding a colorant and a preservative to the phase A dispersed component and stirring and dispersing the mixture uniformly to obtain a phase AB mixed dispersed component; Step B3, adding the physical sunscreen composite powder according to any one of claims 1 to 4 and the chemical sunscreen agent to the AB phase mixed and dispersed components, stirring and dispersing them evenly, and freeze-drying to obtain a loose powder sunscreen cosmetic.
8. The method for preparing a powder sunscreen cosmetic according to claim 7, characterized in that: After step B3, the method further includes step B4, compressing the powder sunscreen cosmetics to obtain powder sunscreen cosmetics in the form of pressed powder.
9. Use of the physical sunscreen composite powder according to any one of claims 1 to 4 in the preparation of powder sunscreen cosmetics.
10. The use according to claim 9, characterized in that: The application is specifically: application of physical sunscreen composite powder in the preparation of sunscreen pressed powder or sunscreen loose powder.