CN115154337B

CN115154337B - Transparent sun-proof powder and its preparation method

Info

Publication number: CN115154337B
Application number: CN202210816635.3A
Authority: CN
Inventors: 马永强; 刘军; 王学迪; 陈彬; 赵毅; 徐婷; 杨儒雅; 吴旭
Original assignee: Bloomage Biotech Co Ltd
Current assignee: Bloomage Biotech Co Ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2023-07-25
Anticipated expiration: 2042-07-12
Also published as: CN115154337A

Abstract

The application discloses a clear sun-proof powder and a preparation method thereof. The sun-proof powder adopts a mode of combining a physical sun-proof agent and a chemical sun-proof agent, has excellent sun-proof effect, and can prevent the chemical sun-proof agent from agglomerating and reach a preset SPF value by adding the sun-proof agent dispersing agent into the sun-proof powder, and the sun-proof powder can increase the adding amount of the chemical sun-proof agent by more than 50 percent and can be uniformly dispersed in powder under the condition of dispersing without using other grease compared with the traditional formula, so that the sun-proof powder is easier to use in a formula system with less oil content such as powder cake and powder dispersion.

Description

Transparent sun-proof powder and its preparation method

Technical Field

The application relates to the technical field of cosmetics, in particular to a clear sun-proof powder and a preparation method thereof.

Background

Today, where the cosmetic field is mature, sun protection is an indispensable step in life, and sun protection products can not only prevent the problem of sunburn when exposed to sunlight, but also effectively prevent photoaging of skin, and from market manifestations, consumers demand sun protection products more and more.

The powder is a makeup product used by people in the last step of makeup, has the advantages of high sun-proof value, non-greasiness, easiness in makeup supplementing and the like, but in the prior technical scheme, the applicant finds that the current commercial sun-proof powder has fewer varieties and a large part of heavy skin feel, and the makeup feel can be whitened and shiny under the irradiation of outdoor light, and is unnatural.

The traditional sun-screening powder mainly selects sun-screening agents such as physical sun-screening agents, such as titanium dioxide, zinc oxide and the like, however, the powder has high refractive index, and when the powder is added into a formula, the powder is pseudo-white after being applied to the face, and is unnatural. In order to ensure a certain sun protection value, a chemical sun protection agent can be added into the powder product to reduce the dosage of the physical sun protection agent, thereby solving the problem of false white of the powder after the powder is applied to the face. The traditional sun-proof powder cake, sun-proof powder and other powder products are usually added with about 3% of chemical sun-proof agent to improve the SPF value of the whole formula, if more chemical sun-proof agents are added in the formula system, the problem that the sun-proof agent and the powder are combined to form clusters is found, and the chemical sun-proof agent cannot exert all effects because the chemical sun-proof agent is not completely dispersed.

Therefore, the problem that the chemical sun-screening agent is added more and can be agglomerated is solved, so that the problem of false white caused by excessive addition of physical sun-screening agents such as titanium dioxide and zinc oxide is reduced, a combination mode of chemical sun-screening and physical sun-screening is found, and the sun-screening powder which is clear and has a high SPF value is manufactured, so that the problem to be solved is urgent.

Disclosure of Invention

Based on the problem that more sun-screening agent is used in the prior art, the sun-screening agent and powder are combined to form clusters, the application provides sun-screening powder, the problem that the chemical sun-screening agent is excessively added to the sun-screening powder to form clusters in the prior art can be solved under the condition that the dosage of the chemical sun-screening agent is not reduced, and the sun-screening powder is clear and has a high SPF value.

The specific technical scheme of the application is as follows:

1. a sun powder comprising a physical sun agent, a chemical sun agent, a sun agent dispersant.

2. The sun-screening powder according to item 1, wherein the physical sun-screening agent is 1-35%, preferably 10-35%, the chemical sun-screening agent is 1-10%, preferably 3-8%, the sun-screening agent dispersant is 10-40%, preferably 20-40% by mass of the sun-screening powder; the sun protection powder also comprises a skin feel conditioner, wherein the skin feel conditioner accounts for 1-70%, preferably 20-50%.

3. The sun protection powder according to item 1 or 2, wherein the physical sun protection agent is titanium dioxide and/or zinc oxide, preferably the titanium dioxide is surface-modified nano titanium dioxide, preferably silicone-treated titanium dioxide, further preferably silicone rubber and silicone resin cross-linked coated nano titanium dioxide;

preferably, the zinc oxide is nano zinc oxide subjected to surface coating treatment, preferably zinc oxide subjected to alkyl silicon treatment, and further preferably nano zinc oxide subjected to triethoxy octyl silane coating treatment.

4. The sun protection powder according to any one of claims 1 to 3, wherein the chemical sun protection agent is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone and bis-ethylhexyl oxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate.

5. The sun protection powder according to any one of claims 1 to 4, wherein the sun protection agent dispersant is a silicone resin, a silicone composite powder or porous silica, preferably a silicone composite powder;

preferably, the silicone resin is polymethylsilsesquioxane and the silicone composite powder is polydimethylsiloxane/vinylpolydimethylsiloxane cross-linked polymer (and) silica and/or vinylpolydimethylsiloxane/polymethylsilsesquioxane cross-linked polymer, preferably vinylpolydimethylsiloxane/polymethylsilsesquioxane cross-linked polymer.

6. The sun powder according to any one of claims 1 to 5, wherein the skin feel conditioning agent is selected from one or two or more of silica, aluminum starch octenyl succinate, PMMA and nylon-12.

7. The sun-protection powder according to any one of claims 1 to 6, wherein the sun-protection powder further comprises a cooling agent, a preservative and a skin conditioning agent, preferably, the cooling agent is 0.1 to 2%, the preservative is 0.1 to 1%, and the skin conditioning agent is 0.01 to 5% based on the mass percentage of the sun-protection powder.

8. The sun powder of claim 7, wherein the cooling agent is menthoxypropanediol.

9. The sun powder of item 7 or 8, wherein the preservative is glycerol octanoate and/or 1,2 hexanediol.

10. The sun protection powder according to any one of claims 7 to 9, wherein the skin conditioning agent is selected from one or more of sodium hyaluronate, ectoin, pearl powder, citrus fruit extract, and artemia extract.

11. A method of preparing a sunscreen powder comprising:

mixing chemical sunscreens to obtain a solution A;

dispersing the solution A and a sunscreen agent dispersing agent, filtering, and removing filter residues to obtain first powder;

mixing the skin-feel conditioning agent with filter residues to obtain second powder;

mixing and dispersing the first powder and the second powder, and then adding a cool feeling agent, a preservative and a skin conditioning agent to obtain a mixture;

and mixing the mixture with a physical sun-screening agent to obtain sun-screening powder.

12. The method according to item 11, wherein the physical sunscreen agent is 1-35%, preferably 10-35%, by mass of the sunscreen powder;

the chemical sun-screening agent is 1-10%, preferably 3-8%;

the dispersant of the sun-screening agent is 10-40%, preferably 20-40%;

the skin feel conditioning agent is 1-70%, preferably 20-50%;

the cool feeling agent is 0.1-2%, the preservative is 0.1-1%, and the skin conditioner is 0.01-5%.

13. The method according to item 11 or 12, wherein the physical sunscreen agent is titanium dioxide and/or zinc oxide, preferably the titanium dioxide is surface-modified nano titanium dioxide, preferably silicone-treated titanium dioxide, further preferably silicone rubber and silicone resin cross-linked coated nano titanium dioxide;

14. The method according to any one of claims 11-13, wherein the chemical sunscreen is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone and bis-ethylhexyl oxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate.

15. The method according to any one of claims 11-14, wherein the sunscreen dispersant is a silicone resin, a silicone composite powder or porous silica, preferably a silicone composite powder;

16. The method of any of claims 11-15, wherein the skin feel conditioning agent is selected from one or more of silica, aluminum starch octenyl succinate, PMMA, and nylon-12.

17. The method of any of claims 11-16, wherein the cooling agent is menthoxypropanediol;

preferably, the preservative is glycerol octanoate and/or 1,2 hexanediol;

preferably, the skin conditioner is selected from one or more of sodium hyaluronate, ectoin, pearl powder, citrus fruit extract and artemia extract.

ADVANTAGEOUS EFFECTS OF INVENTION

The sun-screening powder has excellent sun-screening effect by combining the physical sun-screening agent and the chemical sun-screening agent, and the addition of the sun-screening agent dispersing agent in the sun-screening powder can prevent the chemical sun-screening agent from agglomerating, so that the preset SPF value can be achieved.

The sunscreen powder disclosed by the application can increase the addition amount of the chemical sunscreen agent by more than 50% under the condition that other grease is not used for dispersion, and the chemical sunscreen agent can be uniformly dispersed in the powder, so that the chemical sunscreen agent is easier to use in a formula system with less oil content, such as a powder cake and powder.

Detailed Description

The embodiments described below are described in detail for the present application. While specific embodiments of the present application are shown, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It should be noted that certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will understand that a person may refer to the same component by different names. The specification and claims do not identify differences in terms of components, but rather differences in terms of the functionality of the components. As referred to throughout the specification and claims, the terms "include" or "comprising" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description hereinafter sets forth the preferred embodiment for carrying out the present application, but is not intended to limit the scope of the present application in general, as the description proceeds. The scope of the present application is defined by the appended claims.

The present application provides a sunscreen powder comprising a physical sunscreen, a chemical sunscreen, a sunscreen dispersant, and a skin feel conditioner.

The physical sunscreens may be, for example, titanium dioxide and/or zinc oxide, preferably, the titanium dioxide is a surface-modified nano titanium dioxide including, but not limited to, alkyl silicon-treated titanium dioxide, amino acid-treated titanium dioxide, isopropyl titanium triisostearate-treated titanium dioxide, dimethyl silicone oil or methyl silicone oil-treated titanium dioxide, silicone-treated titanium dioxide, preferably silicone-treated titanium dioxide, further preferably silicone rubber and silicone resin cross-linked coated nano titanium dioxide;

preferably, the zinc oxide is a surface-coated nano zinc oxide, and the surface-coated nano zinc oxide includes, but is not limited to, alkyl silicon-treated zinc oxide, titanium isopropoxide triisostearate-treated zinc oxide, and amino acid-treated zinc oxide, preferably alkyl silicon-treated zinc oxide, and more preferably triethoxy octyl silane-coated nano zinc oxide.

The chemical sunscreens may be selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone and bis-ethylhexyl oxyphenol methoxyphenyl triazine, for example, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate.

The sunscreen dispersant may be, for example, a silicone resin, a silicone composite powder, or porous silica, preferably a silicone composite powder.

The organic silicon resin refers to a generic term of a polymer with a framework formed by alternately connecting silicon atoms and oxygen atoms, and comprises polymethyl silsesquioxane.

The organic silicon composite powder refers to a powder prepared by grafting and coating organic silicon resin on the surface of organic silicon rubber, wherein the powder is polydimethylsiloxane/vinyl polydimethylsiloxane cross-linked polymer (and) silica and/or vinyl polydimethylsiloxane/polymethyl siloxane silsesquioxane cross-linked polymer, and preferably vinyl polydimethylsiloxane/polymethyl siloxane silsesquioxane cross-linked polymer.

The porous silica is a novel one-dimensional nano photon crystal material, has a quantum sponge-like microstructure with nano silicon atom clusters as a framework, and can be formed by electrochemical anodic corrosion or chemical corrosion of monocrystalline silicon.

The skin feel conditioning agent may be, for example, one or two or more selected from silica, aluminum starch octenyl succinate, polymethyl methacrylate (PMMA), and nylon-12.

The polydimethylsiloxane/vinyl polydimethylsiloxane cross-linked polymer (and) silica refers to a composite of polydimethylsiloxane/vinyl polydimethylsiloxane cross-linked polymer and silica.

In some embodiments, the physical sunscreen agent is 1-35%, preferably 10-35%, the chemical sunscreen agent is 1-10%, preferably 3-8%, the sunscreen agent dispersant is 10-40%, preferably 20-40%, the skin feel conditioning agent is 1-70%, preferably 20-50% by mass of the sunscreen powder.

For example, the physical sunscreens may be 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, etc. by mass percent of the sunscreens powder;

the chemical sunscreens may be 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, etc.;

the sunscreen dispersant may be 10%, 15%, 20%, 25%, 30%, 35%, 40%, etc.;

the skin feel conditioning agent may be 1%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 50%, 60%, 70%, etc.

In some embodiments, when ethylhexyl methoxycinnamate and ethylhexyl salicylate are used as chemical sunscreens, the ratio of the mass of ethylhexyl methoxycinnamate to the mass of ethylhexyl salicylate herein is not subject to any limitation, and may be selected according to techniques conventional in the art, for example, the ratio of the mass of ethylhexyl methoxycinnamate to the mass of ethylhexyl salicylate may be 2-8:1.

For example, the mass ratio (m _{Ethylhexyl methoxycinnamate} :m _{Ethylhexyl salicylate} ) May be 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, etc.

In some embodiments, when titanium dioxide and zinc oxide are used as physical sunscreens, the ratio of the mass of titanium dioxide to zinc oxide is not subject to any limitation, and one skilled in the art may make routine selections, for example, the ratio of the mass of titanium dioxide to zinc oxide may be 1-20:1.

For example, the mass ratio (m _{Titanium dioxide} :m _{Zinc oxide} ) May be 1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 11:1, 12:1, 13:1, 14:1, 15:1, 16:1, 17:1, 18:1, 19:1, 20:1, etc.

The chemical sun-screening agent can be prevented from agglomerating by the sun-screening agent dispersing agent in the sun-screening powder, so that the chemical sun-screening agent is uniformly dispersed in the powder.

In some embodiments, the sun powder further comprises a cooling agent, a preservative and a skin conditioning agent, preferably, the cooling agent is 0.1-2%, the preservative is 0.1-1%, and the skin conditioning agent is 0.01-5% based on the mass percentage of the sun powder.

For example, the cooling agent may be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 2%, etc. by mass percent of the sun protection powder;

the skin conditioning agent may be 0.01%, 0.05%, 0.1%, 0.5%, 1%, 2%, 3%, 4%, 5%, etc.

In some embodiments, the cooling agent is menthoxypropanediol.

In some embodiments, the preservative is a preservative commonly used in cosmetics, for example, may be glyceryl caprylate and/or 1, 2-hexanediol, preferably glyceryl caprylate and 1, 2-hexanediol.

The glyceryl caprylate and the 1, 2-hexanediol have antibacterial effect, and can prolong the service life of the sun-proof powder.

The present invention is not limited in any way with respect to the mass ratio of glyceryl caprylate to 1, 2-hexanediol, and may be conventionally selected, for example, the mass ratio of glyceryl caprylate to 1, 2-hexanediol may be 2-5:1.

For example, the mass ratio (m _{Glycerol octanoate} :m _{1, 2-hexanediol} ) May be 2:1, 3:1, 4:1, 5:1, etc.

In some embodiments, the skin conditioning agent is selected from one or more of sodium hyaluronate, ectoin, pearl powder, citrus fruit extract, and artemia extract, preferably sodium hyaluronate, ectoin, pearl powder, citrus fruit extract, and artemia extract.

The molecular weight of sodium hyaluronate is not limited in any way, and the present invention may be conventionally selected, for example, the molecular weight of sodium hyaluronate may be 5k-1000kDa.

When the skin conditioner is sodium hyaluronate, ectoine, pearl powder, citrus fruit extract and artemia salina extract, the sodium hyaluronate is 0.01-0.2% by mass percent of the sun protection powder, the ectoine is 0.01-0.2% by mass percent of the sun protection powder, the pearl powder is 0-5% by mass percent of the citrus fruit extract is 0.1-1% by mass percent of the artemia salina extract is 0.1-1% by mass percent of the sun protection powder.

In some embodiments, the sunscreen powder comprises a physical sunscreen, a chemical sunscreen, a sunscreen dispersant, and a skin feel conditioner. In some embodiments, the physical sunscreen agent is 1-35%, preferably 10-35%, the chemical sunscreen agent is 1-10%, preferably 3-8%, the sunscreen agent dispersant is 10-40%, preferably 20-40%, the skin feel conditioning agent is 1-70%, preferably 20-50% by mass of the sunscreen powder.

In some embodiments, the sunscreen powder comprises a physical sunscreen, a chemical sunscreen, a sunscreen dispersant, and a skin feel conditioner. In some embodiments, the physical sunscreen agent is 1-35%, preferably 10-35%, the chemical sunscreen agent is 1-10%, preferably 3-8%, the sunscreen agent dispersant is 10-40%, preferably 20-40%, the skin feel conditioning agent is 1-70%, preferably 20-50% by mass of the sunscreen powder. In some embodiments, the physical sunscreens are titanium dioxide and/or zinc oxide, preferably the titanium dioxide is a surface modified nano titanium dioxide, preferably a silicone treated titanium dioxide, further preferably a silicone rubber and silicone resin cross-linked coated nano titanium dioxide;

preferably, the zinc oxide is nano zinc oxide subjected to surface coating treatment, preferably zinc oxide subjected to alkyl silicon treatment, and further preferably nano zinc oxide subjected to triethoxy octyl silane coating treatment. In some embodiments, the chemical sunscreen is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone, and bis-ethylhexyl oxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate. In some embodiments, the sunscreen dispersant is a silicone resin, a silicone composite powder, or porous silica, preferably a silicone composite powder; preferably, the silicone resin is polymethylsilsesquioxane and the silicone composite powder is polydimethylsiloxane/vinylpolydimethylsiloxane cross-linked polymer (and) silica and/or vinylpolydimethylsiloxane/polymethylsilsesquioxane cross-linked polymer, preferably vinylpolydimethylsiloxane/polymethylsilsesquioxane cross-linked polymer.

preferably, the zinc oxide is nano zinc oxide subjected to surface coating treatment, preferably zinc oxide subjected to alkyl silicon treatment, and further preferably nano zinc oxide subjected to triethoxy octyl silane coating treatment. In some embodiments, the chemical sunscreen is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone, and bis-ethylhexyl oxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate. In some embodiments, the sunscreen dispersant is a silicone resin, a silicone composite powder, or porous silica, preferably a silicone composite powder; preferably, the silicone resin is polymethylsilsesquioxane and the silicone composite powder is polydimethylsiloxane/vinylpolydimethylsiloxane cross-linked polymer (and) silica and/or vinylpolydimethylsiloxane/polymethylsilsesquioxane cross-linked polymer, preferably vinylpolydimethylsiloxane/polymethylsilsesquioxane cross-linked polymer. In some embodiments, the skin feel conditioning agent is selected from one or more of silica, aluminum starch octenyl succinate, PMMA, and nylon-12.

preferably, the zinc oxide is nano zinc oxide subjected to surface coating treatment, preferably zinc oxide subjected to alkyl silicon treatment, and further preferably nano zinc oxide subjected to triethoxy octyl silane coating treatment. In some embodiments, the chemical sunscreen is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone, and bis-ethylhexyl oxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate. In some embodiments, the sunscreen dispersant is a silicone resin, a silicone composite powder, or porous silica, preferably a silicone composite powder; preferably, the silicone resin is polymethylsilsesquioxane and the silicone composite powder is polydimethylsiloxane/vinylpolydimethylsiloxane cross-linked polymer (and) silica and/or vinylpolydimethylsiloxane/polymethylsilsesquioxane cross-linked polymer, preferably vinylpolydimethylsiloxane/polymethylsilsesquioxane cross-linked polymer. In some embodiments, the skin feel conditioning agent is selected from one or more of silica, aluminum starch octenyl succinate, PMMA, and nylon-12. In some embodiments, the sun powder further comprises a cooling agent, a preservative and a skin conditioning agent, preferably, the cooling agent is 0.1-2%, the preservative is 0.1-1%, and the skin conditioning agent is 0.01-5% based on the mass percentage of the sun powder. In some embodiments, the cooling agent is menthoxypropanediol. In some embodiments, the preservative is glyceryl caprylate and/or 1,2 hexanediol. In some embodiments, the skin conditioning agent is selected from one or more of sodium hyaluronate, ectoin, pearl powder, citrus fruit extract, and artemia extract.

Under the condition that more chemical sun-screening agents are added, the sun-screening agent dispersing agent can effectively help to reduce the caking problem of powder, and the dispersing effect of the sun-screening agent dispersing agent is better when the proportion of the sun-screening agent dispersing agent reaches more than 30%.

The sun-proof powder has a higher SPF value, and the SPF value is more than 10.

The sun-proof powder can reduce the problem of skin stuffiness when being used before sweating, reduce stimulation, enable the face to keep dry and comfortable characteristics after being used, and have no burden on the skin, and can make the skin fresh and cool and simultaneously carry out the sun-proof supplementing process after sweating, so that the product is more portable to use.

The application provides a method for preparing sun protection powder, which comprises the following steps:

mixing chemical sunscreens to obtain a solution A;

dispersing and filtering the solution A and the sun-screening agent dispersing agent, and removing filter residues to obtain first powder;

mixing the first powder and the second powder, and then adding a cool feeling agent, a preservative and a skin conditioning agent to obtain a mixture;

mixing the mixture with physical sunscreen agent to obtain the transparent sunscreen powder.

In some embodiments, the method for preparing the solution a of the chemical sunscreen agent is not limited, and may be selected according to the need, i.e., the solution a may be prepared according to the properties of the chemical sunscreen agent, for example, the solution a may be obtained by heating and dissolving the chemical sunscreen agent, preferably to 85 ℃. In some embodiments, when more than two substances are used as the chemical solvent, the chemical sunscreens are mixed and dissolved to obtain solution a.

In some embodiments, the filtration is a screen filtration, preferably a 60mesh screen filtration.

The chemical sunscreens, physical sunscreens, sunscreens dispersants, skin conditioning agents, cooling agents, preservatives and skin conditioning agents are as described above.

Examples

The materials used in the test and the test methods are generally and/or specifically described herein, and in the examples which follow,% represents wt%, i.e., weight percent, unless otherwise specified. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge, and the sources of the raw materials used in the examples and comparative examples are shown in Table 1.

TABLE 1 raw materials Source list

Raw materials	Model/purity	Manufacturer' s
			Organosilicon rubber and organosilicon resin cross-linked coated nano titanium dioxide	BT 9118	Guangzhou Batai medicine
Zinc oxide coated with triethoxy octyl silane	Z COTE HP 1	BASF
			Vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer	BT 9102	Guangzhou Batai medicine
Starch octenyl succinic acid aluminum	DRY FLO PC	Akzo Nobel Surface Chemistry AB

Example 1

(1) Mixing ethylhexyl methoxycinnamate and ethylhexyl salicylate together, and heating to 85 ℃ to obtain a solution A;

(2) Dispersing the solution A and vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer, then carrying out 60mesh filtration, and removing filter residues to obtain first powder;

(3) Mixing silica with filter residues to obtain second powder;

(4) The first powder and the second powder were put into a disperser, and then menthoxypropane, glycerol caprylate, hexylene glycol, 50kDa sodium hyaluronate, ectoin, pearl powder, citrus fruit extract and artemia extract were sprayed to obtain a sun-proof powder, wherein the content of each component was as shown in table 2, i.e., ethylhexyl methoxycinnamate was 5% by mass in the sun-proof powder, ethylhexyl salicylate was 2%, silicone polymer-coated nano titanium dioxide was 25%, triethoxyoctylsilane-coated zinc oxide was 2%, vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer was 27%, silica was 37.1%, menthoxypropane was 0.4%, glycerol caprylate was 0.3%,1,2 hexylene glycol was 0.5%, sodium hyaluronate was 0.1%, ectoin was 0.1%, pearl powder was 0.1%, citrus fruit extract was 0.2%, and artemia extract was 0.2%.

Example 2

Example 2 was identical to the preparation of example 1, except that the vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer content was 19% and the silica content was 45.1%.

Example 3

Example 3 was identical to the preparation of example 1, except that the vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer was 35% and the silica content was 29.1%.

Example 4

Example 4 was prepared in the same manner as example 1, except that the sunscreen dispersant of example 4 was aluminum starch octenyl succinate.

Example 5

Example 5 the same process as in example 1 was used except that ethylhexyl salicylate and bis-ethylhexyloxyphenol methoxyphenyl triazine were used as physical sunscreens in example 5.

Example 6

Example 6 was identical to the preparation of example 1, except that the vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer was 10% and the silica content was 54.1%.

Example 7

Example 7 was identical to the preparation of example 1, except that the vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer was 40% and the silica content was 24.1%.

Example 8

Example 8 was prepared in the same manner as in example 1 except that ethylhexyl methoxycinnamate was contained in an amount of 5%, ethylhexyl salicylate was contained in an amount of 5%, and silica was contained in an amount of 34.1%.

Example 9

Example 9 was prepared in the same manner as example 1, except that talc was used as the sunscreen dispersant.

Example 10

Example 10 was prepared in the same manner as in example 1, except that no cooling agent, preservative and skin conditioner were added, and the silica content was 39%.

Comparative example 1

Comparative example 1 differs from example 1 in that comparative example 1 does not use a sunscreen dispersant.

Table 2 table of contents of various components in examples and comparative examples

Experimental example 1 caking observation

500g of each of the sunscreen powders of examples 1 to 9 and comparative example 1 was subjected to 60mesh filtration and the caking condition on the screen surface was observed, and the test table is shown in Table 3.

Table 3 caking conditions for each of the examples and comparative examples

	Caking condition
		Example 1	No caking
Example 2	Small amount of caking
		Example 3	No caking
Example 4	Small amount of caking
		Example 5	No caking
Example 6	More caking
		Example 7	No caking
Example 8	More caking
		Example 9	Small amount of caking
Example 10	No caking
		Comparative example 1	More caking

From the table, under the condition that more chemical sun-screening agent is added, the sun-screening agent dispersing agent can effectively help to reduce the caking problem of powder, and the dispersing effect is better when the sun-screening agent dispersing agent reaches more than 30% of the formula.

Experimental example 2: sun protection Effect test

Test materials and methods:

1. the object to be measured: cosmetic end product originals.

2. Control: SPF value 16.1+ -2.4, formulated according to P2 standard formulation.

3. The subject: 5 people total, require: (1) 18-60 years old, healthy men and women; (2) skin health on the back, uniform color, no pigmentation, acne, blemish, nevi, or other skin characterization that affects the test; (3) no history of cosmetic allergy, no history of photosensitivity; (4) not during lactation or pregnancy; (5) the back sun protection test was not performed for nearly 2 months.

4. Light source: the xenon arc lamp (model 601-300W) of the sunlight simulator meets the requirements of measurement specifications.

5. The inspection method comprises the following steps: the test is performed according to the specific requirements of the current effective technical specifications. The subject was tilted forward and irradiated on the back. The minimum erythema dose (MED value) of the subject's skin to ultraviolet irradiation was predicted 24 hours before the test, and the ultraviolet irradiation dose was adjusted based on the prediction result, for testing the test object. On the day of examination, a normal skin area of not less than 30cm2 was first selected on the back of the subject at a rate of (2.00.+ -. 0.05) mg/cm ² Uniformly coating the object to be detected or the reference substance in the area, selecting the irradiation dose according to the standard requirement, and irradiating in three conditions: (1) the skin of the subject is not coated with the test object; (2) coating a reference substance; (3) coating the measured object. After 24 hours, the experimental results were observed and MED values were recorded for the three cases, respectively.

SPF value calculation method: the SPF value of the test object or the reference object for protecting the single subject is expressed by the following formula:

the SPF value of the individual is required to be accurate to one digit after the decimal point, the arithmetic mean of the SPF values of all the tested objects protected by the tested objects is calculated, and the integer part of the arithmetic mean is taken as the SPF value of the tested sample. The sampling error of the estimated mean in the formal test may calculate the standard deviation and standard error of the set of data. The 95% confidence interval (95% CI) for the mean is required to be no more than 17% of the mean, otherwise the number of subjects should be increased (no more than 10) until the above requirement is met, and the test results are shown in Table 4.

TABLE 4 SPF value

	SPF value
		Example 1	41
Example 2	35
		Example 3	42
Example 4	37
		Example 5	36
Example 6	30
		Example 7	43
Example 8	37
		Example 9	35
Example 10	40
		Comparative example 1	34

As can be seen from the table above, the sunscreen powder described in the present application has relatively high SPF values, especially the SPF values of example 1, example 3, example 7 and example 10 are all over 40, which indicates that the addition of more sunscreen agent and dispersant in the present application has better dispersing effect, so that the sunscreen powder has better sunscreen effect.

Experimental example 3 trial investigation experiment

In order to test the experimental effect of the product, several example products with actual SPF exceeding 40 in the examples are selected for trial investigation, 60 persons of consumers using the sunscreen cream and the powder in daily life are investigated, the sunscreen powder obtained in the examples 1, 3 and 7 are fed back after 3 days, and scoring evaluation is carried out on the following items respectively: (1) when the product is used before sweating, the product can prevent the face from being wet, and is completely not approved to be classified into 0 score and is very approved to be classified into 10 score for evaluation; (2) when the composition is used before sweating, skin irritation is prevented, 0 score is completely not recognized, and 10 scores are completely recognized for evaluation; (3) immediately after use, the product can make the face fresh, and the face can be evaluated by completely identifying the face with 0 score and very identifying the face with 10 scores; (4) immediately after use, the sticky feeling of the face is relieved, the score of 0 is completely not recognized, and the score of 10 is very recognized for evaluation; (5) after the face mask is used for 4 hours, the face is kept fresh for a long time, the face mask is completely not recognized for 0 score, and the face mask is completely recognized for 10 score for evaluation; (6) after 8 hours of use, the dressing is durable, 0 points are not identified at all, and 10 points are identified at all for evaluation; (7) after 3 days of use, the product is light, has no burden on the face, does not agree with 0 score at all, and evaluates with 10 scores at all; (8) after 3 days of use, the skin is finer, the skin is completely not identified with 0 score, and the skin is very identified with 10 score for evaluation; (9) after 3 days of use, the preference degree of the product is completely not recognized and evaluated at 0 score and at 10 score. Statistics were then performed, with the statistics table shown in table 5.

TABLE 5 feedback results after consumer use

As can be seen from Table 5, most consumers score more than 7.5 points for the preference of the product, the overall effect of the product is high, the skin stuffiness problem can be reduced when the product is used before sweating, the irritation is reduced, the face can keep dry and comfortable after use, the skin is not burdened, the skin can be refreshed by using the loose powder, and the product is more portable when being used.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present application still fall within the protection scope of the technical solution of the present application.

Claims

1. The sun-screening powder comprises, by mass, 10-35% of a physical sun-screening agent, 3-8% of a chemical sun-screening agent, 20-40% of a sun-screening agent dispersing agent, and 20-50% of a skin-feel conditioning agent;

the physical sun-screening agent is titanium dioxide and/or zinc oxide, the titanium dioxide is nano titanium dioxide coated by organic silicon rubber and organic silicon resin in a crosslinking way, and the zinc dioxide is nano zinc oxide coated by triethoxy octyl silane;

the chemical sun-screening agent is one or more than two selected from ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone and bis-ethylhexyl oxyphenol methoxyphenyl triazine;

the sun-screening agent dispersing agent is vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer;

the skin-feel conditioning agent is one or more than two of silica, aluminum starch octenyl succinate, PMMA and nylon-12.

2. The sunscreen powder of claim 1, wherein the chemical sunscreens are ethylhexyl methoxycinnamate and ethylhexyl salicylate.

3. The sun protection powder according to any one of claims 1-2, wherein the sun protection powder further comprises a cooling agent, a preservative and a skin conditioning agent.

4. The sun protection powder according to claim 3, wherein the cool feeling agent is 0.1-2%, the preservative is 0.1-1%, and the skin conditioning agent is 0.01-5% by mass of the sun protection powder.

5. A sunscreen powder according to claim 3, wherein the cooling agent is menthoxypropanediol.

6. A sunscreen powder according to claim 3, wherein the preservative is glycerol octanoate and/or 1,2 hexanediol.

7. A sunscreen powder according to claim 3, wherein the skin conditioning agent is selected from one or more of sodium hyaluronate, ectoine, pearl powder, citrus fruit extract, and artemia extract.

8. A method of preparing the sunscreen powder of any of claims 1-7, comprising:

mixing chemical sunscreens to obtain a solution A;

mixing and dispersing the first powder and the second powder to obtain a mixture;

9. The method of claim 8, wherein the first powder and the second powder are mixed and dispersed and then added with a cooling agent, a preservative and a skin conditioner to obtain a mixture.