CN115154337A

CN115154337A - Clear sun-screening powder and preparation method thereof

Info

Publication number: CN115154337A
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: 2022-10-11
Anticipated expiration: 2042-07-12
Also published as: CN115154337B

Abstract

The application discloses clear sunscreen loose powder and a preparation method thereof. The sun-screening loose powder has an excellent sun-screening effect by adopting a mode of combining a physical sun-screening agent and a chemical sun-screening agent, can prevent the chemical sun-screening agent from agglomerating by adding a sun-screening agent dispersing agent into the sun-screening loose powder, can reach a preset SPF value, can increase the addition amount of the chemical sun-screening agent by more than 50% compared with the addition amount of a traditional formula under the condition of not using other grease for dispersion, can be uniformly dispersed in the powder, and is easier to use in formula systems with less oil content, such as pressed powder and loose powder.

Description

Clear sun-screening powder and preparation method thereof

Technical Field

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

Background

Nowadays, the field of cosmetics is mature day by day, sun protection is an essential step in life, sun protection products can not only prevent the problems of sunburn and suntan when being exposed to sunlight, but also effectively prevent photoaging of skin, and the market shows that the demand of consumers on sun protection products is higher and higher.

The loose powder is a color cosmetic product used in the last step of makeup, and the sun-proof loose powder has the advantages of high sun-proof value, no greasiness, easiness in makeup and the like, but in the realization of the existing technical scheme, the applicant finds that the currently marketed sun-proof loose powder is few in types and thick and heavy in most skin feelings, and under the irradiation of outdoor light, the makeup feeling is whitish and shiny, and is unnatural.

The main sunscreen agents of choice for traditional sun protection loose powder are physical sunscreen agents, such as titanium dioxide, zinc oxide, etc., however, these powders have very high refractive index, and when added to the formulation, the powder is pseudo-white and unnatural after the face. In order to ensure a certain sun protection value, a chemical sun protection agent can be added into the loose powder product to reduce the dosage of a physical sun protection agent, so that the problem that the powder is false white after the face is put on the powder is solved. The traditional powder products such as sun-screening pressed powder, sun-screening loose powder and the like are usually added with about 3 percent of chemical sun-screening agent to improve the SPF value of the whole formula, if more chemical sun-screening agent is added into the formula system, the problem of agglomeration caused by combination of the sun-screening agent and powder is found, and the chemical sun-screening agent cannot exert all effects because the chemical sun-screening agent is not completely dispersed.

Therefore, the problem that the addition of a chemical sunscreen agent is more and the caking is caused is solved, so that the false white problem caused by the excessive addition of physical sunscreen agents such as titanium dioxide and zinc oxide is reduced, a way of combining chemical sunscreen and physical sunscreen is found, and the sunscreen loose powder which is clearer and has a high SPF value is prepared, so that the problem that the sunscreen loose powder needs to be solved urgently is solved.

Disclosure of Invention

Based on the problem that the combination of the sunscreen agent and the powder is agglomerated when more sunscreen agents are used in the prior art, the invention provides the sunscreen loose powder, which can solve the problem that the addition amount of the chemical sunscreen agent in the sunscreen loose powder is too much and the sunscreen loose powder is caked in the prior art under the condition of not reducing the dosage of the chemical sunscreen agent, and the sunscreen loose powder is clearer and has a high SPF value.

The specific technical scheme of the application is as follows:

1. a sunscreen loose powder comprising a physical sunscreen, a chemical sunscreen, a sunscreen dispersant.

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

3. The sun-screening loose powder according to item 1 or 2, wherein the physical sun-screening agent is titanium dioxide and/or zinc oxide, preferably, the titanium dioxide is surface-modified nano titanium dioxide, preferably organic silicon-treated titanium dioxide, and further preferably organic silicon rubber and organic silicon 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 more preferably nano zinc oxide subjected to triethoxy octyl silane coating treatment.

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

5. The sun-protecting loose powder according to any one of items 1 to 4, wherein the sun-protecting agent dispersant is silicone resin, silicone composite powder or porous silica, preferably silicone composite powder;

preferably, the organic silicon resin is polymethylsilsesquioxane, and the organic silicon composite powder is polydimethylsiloxane/vinyl polydimethylsiloxane crosslinked polymer (and) silica and/or vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosslinked polymer, preferably vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosslinked polymer.

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

7. The sun-protection loose powder according to any one of items 1 to 6, wherein the sun-protection loose powder further comprises a cooling agent, a preservative and a skin conditioner, and preferably, the cooling agent is 0.1 to 2%, the preservative is 0.1 to 1% and the skin conditioner is 0.01 to 5% by mass percentage in the sun-protection loose powder.

8. The sun protection loose powder according to claim 7, wherein the cooling agent is menthoxypropanediol.

9. The sun-protecting loose powder according to item 7 or 8, wherein the preservative is glyceryl caprylate and/or 1,2 hexanediol.

10. The sun-protecting loose powder according to any one of claims 7 to 9, wherein the skin conditioner is one or more selected from sodium hyaluronate, ectoine, pearl powder, citrus fruit extract and artemia extract.

11. A method of making a sun protection loose powder comprising:

mixing a chemical sunscreen agent to obtain a solution A;

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

mixing the skin feel conditioner and the filter residue to obtain second powder;

mixing and dispersing the first powder and the second powder, and then adding a cooling agent, a preservative and a skin conditioner to obtain a mixture;

mixing the mixture with physical sun-screening agent to obtain sunscreen loose powder.

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

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

10-40% of the sunscreen dispersant, preferably 20-40%;

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

0.1-2% of cooling agent, 0.1-1% of preservative and 0.01-5% of skin conditioner.

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 organosilicon-treated titanium dioxide, and further preferably organosilicon rubber and organosilicon resin cross-linked coated nano titanium dioxide;

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

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

preferably, the organic silicon resin is polymethylsilsesquioxane, and the organic silicon composite powder is polydimethylsiloxane/vinyl polydimethylsiloxane crosspolymer (and) silica and/or vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosspolymer, preferably vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosspolymer.

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 glyceryl caprylate and/or 1,2 hexanediol;

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

ADVANTAGEOUS EFFECTS OF INVENTION

The sun-screening loose powder has an excellent sun-screening effect by adopting a mode of combining a physical sun-screening agent and a chemical sun-screening agent, and the sun-screening agent dispersing agent is added into the sun-screening loose powder, so that the chemical sun-screening agent can not agglomerate, and a preset SPF value can be reached.

The sunscreen loose powder can increase the addition amount of a chemical sunscreen agent by more than 50% compared with the addition amount of the traditional formula under the condition of not using other oil for dispersion, can be uniformly dispersed in the powder, and is easier to use in formula systems with low oil content, such as pressed powder and loose powder.

Detailed Description

The embodiments described below explain the present application in detail. While specific embodiments of the present application have been illustrated, it should be understood that the present application may be embodied in various forms and should not be limited by 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. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description that follows is a preferred embodiment of the present application, but is made merely for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.

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

The physical sun-screening agent can be titanium dioxide and/or zinc oxide, preferably, the titanium dioxide is surface-modified nano titanium dioxide, and the surface-modified nano titanium dioxide comprises but is not limited to alkyl silicon treated titanium dioxide, amino acid treated titanium dioxide, isopropyl titanium triisostearate treated titanium dioxide, dimethyl silicon oil or methyl silicon oil treated titanium dioxide, organic silicon treated titanium dioxide, preferably organic silicon treated titanium dioxide, and further preferably organic silicon rubber and organic silicon resin cross-linked coated nano titanium dioxide;

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

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

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

The organic silicon resin is a general name of a polymer with a skeleton formed by alternately connecting silicon atoms and oxygen atoms, and comprises polymethylsilsesquioxane.

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

The porous silica is a novel one-dimensional nano photonic crystal material, has a quantum sponge-shaped 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 selected from one or more of silica, aluminum starch octenyl succinate, polymethyl methacrylate (PMMA), and nylon-12, for example.

The polydimethylsiloxane/vinylpolydimethylsiloxane crosspolymer (and) silica refers to a composite of polydimethylsiloxane/vinylpolydimethylsiloxane crosspolymer 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 dispersing agent is 10-40%, preferably 20-40%, and the skin-feel conditioning agent is 1-70%, preferably 20-50%, by mass percentage in the sunscreen loose powder.

For example, the physical sunscreen agent may be 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, etc. in mass percentage of the sunscreen loose powder;

the chemical sunscreen 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 the chemical sunscreen agent uses ethylhexyl methoxycinnamate and ethylhexyl salicylate, the present application does not impose any limitation on the ratio by mass of ethylhexyl methoxycinnamate and ethylhexyl salicylate, which can be selected according to techniques conventional in the art, for example, the ratio by mass of ethylhexyl methoxycinnamate and ethylhexyl salicylate can be from 2 to 8.

For example, the mass ratio (m) of the two _{Ethylhexyl methoxycinnamate} :m _{Ethyl hexyl salicylate} ) Can be 2.

In some embodiments, when the physical sunscreen agent uses titanium dioxide and zinc oxide, the present application does not put any limitation on the mass ratio of titanium dioxide and zinc oxide, and the skilled person may make routine selections, for example, the mass ratio of titanium dioxide and zinc oxide may be 1 to 20.

For example, the mass ratio (m) of the two _{Titanium dioxide} :m _{Zinc oxide} ) 1, 2.

The sunscreen dispersing agent in the sunscreen loose powder can prevent the chemical sunscreen from agglomerating, so that the chemical sunscreen is uniformly dispersed in the powder.

In some embodiments, the sun-protection loose powder further comprises a cooling agent, a preservative and a skin conditioner, and preferably, the cooling agent is 0.1-2%, the preservative is 0.1-1%, and the skin conditioner is 0.01-5% by mass of the sun-protection loose 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. in terms of mass% in 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 effects, and can prolong the service life of the sunscreen loose powder.

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

For example, the mass ratio (m) of the two _{Glycerol caprylate} :m _{1, 2-hexanediol} ) Can be 2.

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 present invention is not limited in any way as to the molecular weight of sodium hyaluronate, which can be chosen conventionally, for example, the molecular weight of sodium hyaluronate can be between 5k and 1000kDa.

When the skin conditioner is sodium hyaluronate, ectoin, pearl powder, an orange fruit extract and an artemia extract, the sodium hyaluronate is 0.01-0.2 percent, the ectoin is 0.01-0.2 percent, the pearl powder is 0-5 percent, the orange fruit extract is 0.1-1 percent and the artemia extract is 0.1-1 percent by mass percentage in the sun-screening loose powder.

In some embodiments, the sunscreen loose 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 dispersing agent is 10-40%, preferably 20-40%, and the skin-feel conditioning agent is 1-70%, preferably 20-50%, by mass percentage in the sunscreen loose powder.

In some embodiments, the sunscreen loose 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 dispersing agent is 10-40%, preferably 20-40%, and the skin-feel conditioning agent is 1-70%, preferably 20-50%, by mass percentage of the sunscreen loose powder. In some embodiments, the physical sunscreen agent is titanium dioxide and/or zinc oxide, preferably, the titanium dioxide is surface-modified nano titanium dioxide, preferably, organic silicon-treated titanium dioxide, and further preferably, organic silicon rubber and organic silicon 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 more preferably nano zinc oxide subjected to triethoxy octyl silane coating treatment. In some embodiments, the chemical sunscreen agent is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone, and bis-ethylhexyloxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate. In some embodiments, the sunscreen dispersant is a silicone resin, a silicone composite powder, or a porous silica, preferably a silicone composite powder; preferably, the organic silicon resin is polymethylsilsesquioxane, and the organic silicon composite powder is polydimethylsiloxane/vinyl polydimethylsiloxane crosspolymer (and) silica and/or vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosspolymer, preferably vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosspolymer.

preferably, the zinc oxide is nano zinc oxide subjected to surface coating treatment, preferably zinc oxide subjected to alkyl silicon treatment, and more preferably nano zinc oxide subjected to triethoxy octyl silane coating treatment. In some embodiments, the chemical sunscreen agent is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone, and bis-ethylhexyloxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate. In some embodiments, the sunscreen dispersant is a silicone resin, a silicone composite powder, or a porous silica, preferably a silicone composite powder; preferably, the organic silicon resin is polymethylsilsesquioxane, and the organic silicon composite powder is polydimethylsiloxane/vinyl polydimethylsiloxane crosslinked polymer (and) silica and/or vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosslinked polymer, preferably vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosslinked 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 sunscreen loose 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 dispersing agent is 10-40%, preferably 20-40%, and the skin-feel conditioning agent is 1-70%, preferably 20-50%, by mass percentage in the sunscreen loose powder. In some embodiments, the physical sunscreen agent is titanium dioxide and/or zinc oxide, preferably, the titanium dioxide is surface-modified nano titanium dioxide, preferably, organic silicon-treated titanium dioxide, and further preferably, organic silicon rubber and organic silicon 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 more preferably nano zinc oxide subjected to triethoxy octyl silane coating treatment. In some embodiments, the chemical sunscreen agent is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone, and bis-ethylhexyloxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate. In some embodiments, the sunscreen dispersant is a silicone resin, a silicone composite powder, or a porous silica, preferably a silicone composite powder; preferably, the organic silicon resin is polymethylsilsesquioxane, and the organic silicon composite powder is polydimethylsiloxane/vinyl polydimethylsiloxane crosspolymer (and) silica and/or vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosspolymer, preferably vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosspolymer. 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-protection loose powder further comprises a cooling agent, a preservative and a skin conditioner, and preferably, the cooling agent is 0.1-2%, the preservative is 0.1-1%, and the skin conditioner is 0.01-5% by mass of the sun-protection loose 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.

According to the sunscreen loose powder, under the condition that more chemical sunscreen agents are added, the sunscreen agent dispersing agent can effectively help to reduce the caking problem of powder, and when the sunscreen agent dispersing agent reaches more than 30% of the formula, the dispersing effect is good.

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

The application sun-proof loose powder, use before sweating and can reduce the skin sultry problem, reduce the stimulation, enable the face after the use and keep dry and comfortable characteristic, and do not have the burden to skin, also can let skin become salubrious when mend sun-proof process through using loose powder after sweating, the product is used more portably.

The present application provides a method of preparing a sun protection loose powder comprising:

mixing a chemical sunscreen agent 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 adding a cooling agent, a preservative and a skin conditioner to obtain a mixture;

mixing the mixture with a physical sunscreen agent to obtain the clear sunscreen powder.

In some embodiments, the method for preparing the solution a with the chemical sunscreen agent is not limited in this application, and may be selected according to the requirements, i.e. the solution a may be prepared according to the properties of the chemical sunscreen agent, for example, the chemical sunscreen agent may be dissolved by heating to obtain the solution a, and preferably heated to 85 ℃ to obtain the solution a. In some embodiments, when two or more substances are used as the chemical solvent, the chemical sunscreen agent is mixed and dissolved to obtain a solution a.

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

The chemical sunscreen, physical sunscreen, sunscreen dispersant, skin conditioning agent, cooling agent, preservative, and skin conditioning agent are as described above.

Examples

The materials used in the tests and the test methods are generally and/or specifically described herein, and in the examples below,% means wt%, i.e. percent by weight, unless otherwise specified. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products commercially available, wherein the raw material sources used in the examples and comparative examples are shown in Table 1.

Table 1 source of raw materials table

Raw materials	Type/purity	Manufacturer(s) of
			Organic silicon rubber and organic silicon resin cross-linked coated nano titanium dioxide	BT 9118	Guangzhou Batai tea
Triethoxyoctylsilane-coated zinc oxide	Z COTE HP 1	BASF
			Vinyl dimethicone/methicone silsesquioxane crosspolymer	BT 9102	Guangzhou Ba Tai
Aluminum starch octenylsuccinate	DRY FLO PC	Akzo Nobel Surface Chemistry AB

Example 1

(1) Mixing ethylhexyl methoxycinnamate and ethylhexyl salicylate together, and heating to 85 deg.C to obtain solution A;

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

(3) Mixing silica and filter residue to obtain a second powder material;

(4) Putting the first powder and the second powder into a dispersion machine, and spraying menthoxypropanediol, glyceryl caprylate, hexanediol, 50kDa sodium hyaluronate, ectoin, pearl powder, a citrus fruit extract and an artemia extract to obtain the sun-proof loose powder, wherein the content of each component is shown in Table 2, namely the weight percentage of ethylhexyl methoxycinnamate in the sun-proof loose powder is 5%, the weight percentage of ethylhexyl salicylate is 2%, the weight percentage of nano titanium dioxide coated by an organic silicon polymer is 25%, the weight percentage of zinc oxide coated by triethoxyoctylsilane is 2%, the weight percentage of vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer is 27%, the weight percentage of silica is 37.1%, the weight percentage of menthoxypropanediol is 0.4%, the content of glyceryl caprylate is 0.3%, the content of 1,2 hexanediol is 0.5%, the content of sodium hyaluronate is 0.1%, the weight percentage of ectoin is 0.1%, the content of pearl powder is 0.1%, the content of the citrus fruit extract is 0.2%, and the artemia extract is 0.2%.

Example 2

Example 2 was prepared according to the same procedure as in example 1, except that the vinyl dimethicone/methicone silsesquioxane crosspolymer was 19% and the silica content was 45.1%.

Example 3

Example 3 was prepared according to the same procedure as in example 1, except that the vinyl dimethicone/methicone silsesquioxane crosspolymer was 35% and the silica content was 29.1%.

Example 4

Example 4 is prepared identically to example 1 except that the sunscreen dispersant of example 4 employs aluminum starch octenyl succinate.

Example 5

Example 5 is prepared identically to example 1 except that example 5 uses ethylhexyl salicylate and bis-ethylhexyloxyphenol methoxyphenyl triazine as the physical sunscreen.

Example 6

Example 6 was prepared according to the same method as example 1 except that the vinyl dimethicone/methicone silsesquioxane crosspolymer was 10% and the silica content was 54.1%.

Example 7

Example 7 was prepared according to the same procedure as in example 1, except that the vinyl dimethicone/methicone silsesquioxane crosspolymer 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 the content of ethylhexyl methoxycinnamate was 5%, the content of ethylhexyl salicylate was 5%, and the content of silica was 34.1%.

Example 9

Example 9 was prepared according to the same procedure as example 1 except that talc was used as the sunscreen dispersant.

Example 10

Example 10 was prepared according to the same method as 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 Observation of agglomeration

500g of each of the sun protection powders of examples 1 to 9 and comparative example 1 was subjected to 60-mesh filtration and observed for blocking on the surface of the mesh, and the test table is shown in Table 3.

TABLE 3 caking in the examples and comparative examples

	Caking behavior
		Example 1	Without caking
Example 2	A small amount of caking
		Example 3	Without caking
Example 4	A small amount of caking
		Example 5	Without caking
Example 6	More caking
		Example 7	Without caking
Example 8	More junctionBlock
		Example 9	A small amount of caking
Example 10	Without caking
		Comparative example 1	More caking

From the above table, it can be seen that, when the amount of the chemical sunscreen agent is increased, the sunscreen agent dispersant can effectively help to reduce the problem of powder agglomeration, and when the amount of the sunscreen agent dispersant is more than 30% of the formula, the dispersing effect is better.

Experimental example 2: test for sunscreen Effect

Test materials and methods:

1. and (3) measuring an object to be measured: cosmetic end product raw material.

2. Comparison products: SPF value of 16.1 +/-2.4, and is prepared according to a P2 standard formula.

3. Subject: total 5 persons, require: (1) 18-60 years old, healthy male and female; (2) skin health on the back, uniform color, no pigmentation, acne, pox marks, moles, or other skin characteristics affecting the test; (3) no cosmetic allergy history or photosensitivity history; (4) during lactation and pregnancy; (5) no back sun protection test was done for approximately 2 months.

4. Light source: the solar simulator xenon arc lamp (model 601-300W) has various performance indexes meeting the requirement of the measurement specification.

5. The detection method comprises the following steps: the examination is carried out according to the specific requirements of the current effective technical specification. The subject was positioned in the anteversion position and irradiated on his back. The minimum amount of erythema (MED) of the skin of the subject irradiated with ultraviolet rays is predicted 24 hours before the test, and the ultraviolet irradiation dose is adjusted according to the prediction result to test the object. On the test day, first, a test sample of not less than 30c was selected on the back of the subjectm2 of normal skin area in terms 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 according to three conditions: (1) subject skin is not coated with test substance; (2) coating a reference substance; (3) coating the measured object. The results were observed after 24 hours and the MED was recorded for each of the three cases.

6, SPF value calculation method: the SPF value of the test or control to protect an individual subject is represented by the formula:

the individual SPF value is required to be accurate to one digit after a decimal point, the arithmetic mean of the SPF values of all tested testees protected by the tested object is calculated, and the integral part of the arithmetic mean is the SPF value of the tested sample. The sampling error of the estimated mean in the official test can calculate the standard deviation and standard error of the group of data. The 95% confidence interval (95% CI) of the mean was required to be no more than 17% of the mean, otherwise the number of subjects was increased (no more than 10) until the above requirements were met, and the test results are shown in Table 4.

TABLE 4 SPF values

	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 above table, the sun protection powder of the present application has a relatively high SPF value, especially, the SPF values of examples 1, 3, 7 and 10 exceed 40, which indicates that the sun protection powder of the present application has a good dispersing effect by adding more sun protection agent dispersing agent, so that the sun protection powder has a good sun protection 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 were selected to be subjected to trial investigation experiments, and the investigation subjects were 60 consumers who used sunscreen cream and loose powder daily, so that the sunscreen loose powder obtained in example 1, example 3 and example 7 were used respectively for feedback after 3 days, and the following items were scored respectively: (1) the product can prevent facial moisture when used before sweating, and is completely approved to beat for 0 point and 10 points for evaluation; (2) the product is used before sweating to prevent skin irritation, and the evaluation is carried out on 0 point which is completely different from the evaluation on 10 points which are very different from the evaluation on 0 point; (3) immediately after use, the product can make the face fresh and cool, and the rating is 0 in no approval and 10 in no approval; (4) immediately after use, the sticky feeling of the face is relieved, the rating of 0 is completely different, and the rating of 10 is very different; (5) after the facial mask is used for 4 hours, the face is kept fresh and cool for a long time, the rating is 0 when the facial mask is completely approved, and the rating is 10 when the facial mask is very approved for evaluation; (6) after 8 hours of use, the makeup is kept for a long time, the makeup is completely not approved for 0 point, and the makeup is approved for 10 points for evaluation; (7) after 3 days of use, the product is light, has no burden on the face, and is rated 0 by totally different approval and rated 10 by extraordinary approval; (8) after 3 days of use, the skin is more delicate, the score is 0 in no approval, and the score is 10 in no approval for evaluation; (9) after 3 days of use, the preference degree of the product is evaluated by not accepting the score 0 at all but accepting the score 10 at all. Statistics were then performed and the statistical table is 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 according to the preference degree of the product, the overall effect is high, the product is used before sweating to reduce the skin sultry problem and reduce the irritation, the face can keep dry and comfortable after the product is used, no burden is caused to the skin, the skin can be refreshed by using the loose powder after sweating, and the product is more portable when being used.

The foregoing is directed to preferred embodiments of the present application, other than the limiting examples of the present application, and variations of the present application may be made by those skilled in the art using the foregoing teachings. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belong to the protection scope of the technical solution of the present application.

Claims

1. A sunscreen loose powder, which comprises a physical sunscreen agent, a chemical sunscreen agent and a sunscreen dispersing agent.

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

3. The sun-screening loose powder according to claim 1 or 2, wherein the physical sun-screening agent is titanium dioxide and/or zinc oxide, preferably, the titanium dioxide is surface-modified nano titanium dioxide, preferably organic silicon-treated titanium dioxide, and further preferably organic silicon rubber and organic silicon 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;

preferably, the chemical sunscreen agent is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone and bis-ethylhexyloxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate;

preferably, the sunscreen dispersant is organic silicon resin, organic silicon composite powder or porous silica, preferably organic silicon composite powder;

preferably, the organic silicon resin is polymethylsilsesquioxane, and the organic silicon composite powder is polydimethylsiloxane/vinyl polydimethylsiloxane crosslinked polymer (and) silica and/or vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosslinked polymer, preferably vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosslinked polymer;

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

4. The sun protection loose powder according to any one of claims 1 to 3, wherein the sun protection loose powder further comprises a cooling agent, a preservative and a skin conditioner, preferably, the cooling agent is 0.1 to 2%, the preservative is 0.1 to 1%, and the skin conditioner is 0.01 to 5% by mass percentage in the sun protection loose powder;

preferably, the cooling agent is menthoxypropanediol;

preferably, the preservative is glyceryl caprylate and/or 1,2 hexanediol;

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

5. A method of making a sun protection loose powder comprising:

mixing a chemical sunscreen agent to obtain a solution A;

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

6. The method according to claim 5, wherein the physical sun-screening agent is 1-35%, preferably 10-35% by mass of the sun-screening loose powder;

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

10-40% of the sunscreen dispersant, preferably 20-40%;

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

7. The method according to claim 5 or 6, wherein the physical sunscreen agent is titanium dioxide and/or zinc oxide, preferably, the titanium dioxide is surface-modified nano titanium dioxide, preferably organic silicon-treated titanium dioxide, and further preferably organic silicon rubber and organic silicon resin cross-linked coated nano titanium dioxide;

preferably, the chemical sunscreen agent is selected from one or more of ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyl triazone and bis-ethylhexyloxyphenol methoxyphenyl triazine, preferably ethylhexyl methoxycinnamate and ethylhexyl salicylate.

8. The method according to any one of claims 5-7, wherein the sunscreen dispersant is a silicone resin, a silicone composite powder or porous silica, preferably a silicone composite powder;

9. The method of any of claims 5-8, wherein the skin feel conditioning agent is selected from one or more of silica, aluminum starch octenyl succinate, PMMA, and nylon-12.

10. The method of any of claims 5-9, wherein the cooling agent is menthoxypropanediol;

preferably, the preservative is glyceryl caprylate and/or 1,2 hexanediol;