Solid powder ultraviolet-protective agent, method for producing same, and cosmetic

Abstract

[Problem] To provide a solid powder ultraviolet-protective agent having improved cohesiveness and sensation upon use. [Solution] A solid powder ultraviolet-protective agent containing: (A) an ultraviolet absorber, (B) a non-ionic surfactant having an HLB value of 10 or more, and (C) a dispersibility enhancer. The component (C) is one or both of a water-soluble polymer having an acrylic acid site and a polysaccharide having a hydrophobic group with 12 or more carbon atoms.

Description

Solid powder UV protection agent, its manufacturing method, and cosmetic

[0001] The present invention relates to a solid powder ultraviolet protection agent and a method for producing the same. The present invention also relates to a cosmetic composition containing the ultraviolet protection agent.

[0002]

[0003] Solid powder cosmetics, such as powder foundations and sunscreen powders, which are prepared by solidifying powder cosmetics, have been known for some time. Such solid powder cosmetics are generally applied to the skin by taking a portion of the cosmetic from the surface using a puff or the like. However, it is extremely important that the cosmetic has an ultraviolet protection effect to protect the wearer from ultraviolet rays. Therefore, it is necessary to effectively incorporate ultraviolet scattering agents and ultraviolet absorbers into solid powder cosmetics.

[0003] For example, Patent Document 1 discloses a solid powder cosmetic that contains a pigment having an ultraviolet ray scattering effect, such as titanium oxide or zinc oxide, and an ultraviolet ray absorber, such as 2-hydroxy-4-methoxybenzophenone.

[0004] JP 2022-075058 A JP 2018-115098 A JP 2022-182858 A JP 2016-124839 A JP 2023-079365 A

[0005] In order for solid powder cosmetics to exert their UV protection effect, they must be effectively formulated with UV absorbers and UV scattering agents, but there are various challenges in effectively formulating these ingredients.

[0006] For example, because liquid UV absorbers have a stickiness that is unique to absorbers, when a liquid UV absorber is blended into a solid powder cosmetic, a phenomenon called caking occurs, in which the powder particles form clumps or the entire cake surface of the solid cosmetic becomes hard to remove. For this reason, blending a liquid UV absorber into a solid powder cosmetic may deteriorate the quality of the cosmetic, deteriorate usability by making it difficult to apply evenly to the skin, and cause a poor feel when used, such as a strong sticking sensation to the skin.

[0007] On the other hand, various techniques have been proposed to date in an attempt to solve the problem of agglomeration and caking caused by the incorporation of oils into solid powder cosmetics, such as a powder surface treatment technique, a dispersion technique using a surfactant, and a caking suppression technique using silica with a high oil absorption capacity (for example, Patent Documents 1 to 5).

[0008] However, the surface treatment techniques, dispersion techniques, and caking prevention techniques discovered to date have not been effective enough in improving the aggregation and caking phenomena in formulations in which an ultraviolet absorber is blended into a solid powder cosmetic.

[0009] Furthermore, it has been confirmed that aggregation and caking prevention technologies that use silica, which has a high oil absorption capacity, endow cosmetics with the rolling properties characteristic of silica, resulting in a smooth feel in use, reduced adhesion of the cosmetics to the skin, and worsened uniformity of the cosmetic film. In other words, when using silica to prevent aggregation and caking, it is also important to achieve both an improvement in aggregation and adhesion to the skin / uniformity of the film.

[0010] On the other hand, there are various challenges when effectively incorporating UV scattering agents into solid powder cosmetics. For example, because powdery UV scattering agents have high cohesion, incorporating them into cosmetics not only reduces the quality of the cosmetics, but also creates a squelchy feeling characteristic of scattering agents when applied to the skin, worsening the feel of the cosmetics in use. The squelchy feeling is an unpleasant sensation felt when the cosmetics are applied to the skin, impeding smooth movement over the skin surface. Therefore, in an attempt to solve the problems of cohesion and squelchy feeling of powder cosmetics, various techniques have been developed to date, including surface treatment techniques for modifying the surface condition of powders and powder dispersion techniques that combine surfactants and water-soluble polymers (e.g., Patent Documents 2 and 3). However, the powder surface modification and dispersion techniques discovered so far have not been effective enough in improving the cohesion and feel of powders in solid powder cosmetics.

[0011] Therefore, a main object of the present invention is to provide a solid powdery ultraviolet protection agent that has improved cohesiveness and feeling when used.

[0012] [1. UV Protection Agent Containing a UV Absorber] The inventors of the present invention have intensively investigated means for solving the problems of the prior art related to UV absorbers. As a result, they have found that by forming a bulk containing a UV absorber, a nonionic surfactant with an HLB of 10 or more, and a dispersibility promoter such as a specific water-soluble polymer into a solid powder, it is possible to achieve both the effect of suppressing aggregation and caking, and adhesion to the skin / uniformity of the coating film. They have also found that this compatibility can be further improved by further incorporating silica, polysaccharides, and / or a UV scattering agent (especially a particulate UV scattering agent) with high oil absorption into the UV protection agent. They have also found that solidifying the UV protection agent by freeze-drying is particularly suitable. Based on these findings, the inventors have conceived the solution to the problems of the prior art and have completed the present invention. The present invention, which relates to a UV protection agent containing a UV absorber, is described in detail below.

[0013] A first aspect of the present invention is a solid powder ultraviolet protection agent. The ultraviolet protection agent contains (A) an ultraviolet absorber, (B) a nonionic surfactant having an HLB value of 10 or more, and (C) a dispersibility promoter. Component (C) the dispersibility promoter is both or either a water-soluble polymer having an acrylic acid moiety and a polysaccharide having a hydrophobic group having 12 or more carbon atoms. As mentioned above, when an ultraviolet absorber is blended with an ultraviolet protection agent, the stickiness inherent to the absorber causes aggregation and caking. In contrast, by blending a highly hydrophilic nonionic surfactant with an HLB value of 10 or more, the hydrophobic group acts to improve the dispersibility of the ultraviolet absorber in water in the water-containing bulk before solidification. The HLB (Hydrophilic-Lipophilic Balance) value is an index representing the balance between hydrophilicity and hydrophobicity of a nonionic surfactant. An HLB value of 10 or greater indicates that the nonionic surfactant is a highly hydrophilic surfactant (typically used in O / W emulsification, etc.). In addition, the present invention further incorporates, as a dispersibility promoter (component (C)), either or both of a water-soluble polymer having an acrylic acid moiety and a polysaccharide having a hydrophobic group with 12 or more carbon atoms. This component (C) further promotes the dispersibility of the UV absorber in water in the water-containing bulk before solidification. Therefore, even in UV protection agents formulated with UV absorbers, the occurrence of aggregates and caking can be sufficiently suppressed. Furthermore, because water-soluble polymers having acrylic acid moieties have excellent film-forming ability, incorporating them into UV protection agents facilitates the formation of a uniform thin film on the skin. Furthermore, the properties of the water-soluble polymer improve the adhesion of the UV protection agent to the skin. Furthermore, the water-soluble polymer having an acrylic acid moiety has the effect of stabilizing the dispersion of other components (especially UV absorbers), and the presence of this water-soluble polymer between powder particles can prevent the particles from agglomerating and suppress the caking phenomenon. In other words, by blending components (A) to (C), a solid powder UV protection agent can be obtained in which the UV absorber is effectively dispersed. This can improve the cohesiveness and usability of the UV protection agent.

[0014] The UV protection agent according to the present invention is preferably solidified by lyophilization (so-called freeze-drying). Lyophilization is a technique in which a substance is frozen and then dried by sublimating the water (ice) under vacuum. Since the UV absorber is effectively dispersed in a bulk containing water before solidification, solidifying this bulk by lyophilization allows the UV absorber to maintain an effective dispersion state even after solidification. This can further improve the cohesiveness and usability of the UV protection agent.

[0015] The UV protection agent according to the present invention preferably further contains silica having an oil absorption of 30 ml / 100 g or more as component (F). The use of silica with a high oil absorption thus prevents the formation of aggregates and caking in the UV protection agent. This effect is thought to be due to the fact that silica also has a certain degree of oil and water absorption, and its addition to the bulk increases the slurry viscosity. This extends the duration of the dispersion state of the UV absorber (component (A)) by components (B) and (C), thereby improving the dispersibility of the UV absorber. The inclusion of silica imparts unique rolling properties to the cosmetic, which may reduce the adhesive strength of the cosmetic to the skin and impair the uniformity of the cosmetic coating. In response to this, the UV protection agent may be blended with a water-soluble polymer having an acrylic acid moiety and / or a polysaccharide having a hydrophobic group with 12 or more carbon atoms as a dispersibility promoter for component (C) together with silica, thereby preventing the reduction in adhesive strength and the deterioration of the coating uniformity.

[0016] A second aspect of the present invention is a cosmetic, particularly a solid powder cosmetic, containing the UV protection agent according to the first aspect. Examples of the cosmetic according to the present invention include powder foundation, skin tone control powder, and sunscreen powder.

[0017] The third aspect of the present invention relates to a method for producing a solid powder UV protection agent. First, a mixture is obtained by mixing (A) an UV absorber, (B) a nonionic surfactant with an HLB value of 10 or more, and (C) a dispersibility enhancer with water (mixing step). Component (C), the dispersibility enhancer, is a water-soluble polymer having an acrylic acid moiety and / or a polysaccharide having a hydrophobic group having 12 or more carbon atoms. Next, this mixture is filled into a mold and frozen to obtain a frozen product (freezing step). Next, the frozen product is dried in a vacuum dryer (drying step). In this drying step, the water (ice) in the frozen product is sublimated to obtain a solid product.

[0018] [2. UV Protection Agent Containing UV Scattering Agent] The inventors of the present invention have conducted extensive research into means for solving the problems of the prior art related to UV scattering agents, and have discovered that by blending a hydrophobically treated UV scattering agent with a polysaccharide and a highly hydrophilic nonionic surfactant, a solid powder UV protection agent with improved cohesiveness and usability can be obtained. In particular, they have found that it is preferable to solidify the UV protection agent by freeze-drying. Based on this finding, the inventors have conceived that the problems of the prior art can be solved and have completed the present invention. The present invention, which relates to a UV protection agent containing a UV scattering agent, will now be described in detail.

[0019] A first aspect of the present invention is a solid powder UV protection agent. The UV protection agent contains (a) a hydrophobized UV scattering agent, (B) a nonionic surfactant having an HLB value of 10 or more, and (D) a polysaccharide as a dispersibility maintaining agent. The hydrophobized UV scattering agent is an agent in which a hydrophobic group is introduced onto the surface of an inorganic substance that basically has a UV scattering effect. The HLB (Hydrophilic-Lipophilic Balance) value is an index representing the balance between hydrophilicity and hydrophobicity of a nonionic surfactant, and an HLB value of 10 or more means that the nonionic surfactant is a highly hydrophilic surfactant (generally an agent used in O / W emulsification, etc.). The hydrophilic polysaccharide improves the viscosity of the water-containing bulk before solidification and improves the stability of the solid powder after solidification. Furthermore, when a hydrophilic nonionic surfactant with an HLB value of 10 or more is added, the dispersibility of the hydrophobized UV scattering agent in the moisture-containing bulk before solidification is improved due to the action of the hydrophobic group. Furthermore, when a hydrophobized UV scattering agent is combined with a hydrophilic nonionic surfactant with an HLB value of 10 or more and a hydrophilic polysaccharide, it is thought that an association is formed through hydrophobic interactions and hydrogen bonds, and thus the addition of these compounds further improves the viscosity of the bulk and the stability of the solid powder after solidifying this bulk. In other words, the addition of components (a) to (D) results in a solid powder UV protection agent in which the UV scattering agent is effectively dispersed. Therefore, the cohesiveness and usability of the UV protection agent can be improved.

[0020] The UV protection agent according to the present invention is preferably solidified by lyophilization (so-called freeze-drying). Lyophilization is a technique in which a substance is frozen and then dried by sublimating the water (ice) under vacuum. The hydrophobized UV scattering agent is effectively dispersed in a bulk containing water before solidification. Therefore, by solidifying this bulk by lyophilization, the effective dispersion state of the hydrophobized UV scattering agent can be maintained even after solidification. This can further improve the cohesiveness and usability of the UV protection agent.

[0021] The ultraviolet protection agent according to the present invention has a density of 0.3 to 1.5 g / cm ３The ultraviolet protection agent solidified by freeze-drying thus has a relatively low density.

[0022] A second aspect of the present invention is a cosmetic, particularly a solid powder cosmetic, containing the UV protection agent according to the first aspect. Examples of the cosmetic according to the present invention include powder foundation, skin tone control powder, and sunscreen powder.

[0023] The third aspect of the present invention relates to a method for producing a solid powder UV protection agent. First, a mixture is obtained by mixing (a) a powdered hydrophobized UV scattering agent, (B) a nonionic surfactant having an HLB value of 10 or more, and (D) a polysaccharide as a dispersibility maintaining agent with water (mixing step). Next, this mixture is filled into a mold and frozen to obtain a frozen product (freezing step). Next, this frozen product is dried in a vacuum dryer (drying step). In this drying step, the water (ice) in the frozen product is sublimated to obtain a solid product.

[0024] According to the present invention, it is possible to provide a solid powdery ultraviolet protection agent having improved cohesiveness and improved usability.

[0025] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and includes appropriate modifications of the embodiments described below within the scope obvious to those skilled in the art.

[0026] In the present specification, the numerical range "A to B" means "A or more and B or less."

[0027] ■ 1. UV Protection Agent Containing UV Absorber ■ [1. UV Protection Agent] The UV protection agent of the present invention is a solid powder agent obtained by solidifying powdered ingredients. The UV protection agent of the present invention contains at least the following components (A) to (C): (A) UV absorber (B) nonionic surfactant with an HLB value of 10 or more (C) dispersibility enhancer, water-soluble polymer having an acrylic acid moiety and / or polysaccharide having a hydrophobic group having 12 or more carbon atoms. In addition, in a preferred embodiment, the UV protection agent of the present invention may contain the following components (D), (E), and / or (F): (D) polysaccharide (E) UV scattering agent (F) silica

[0028] The present invention may be a solid powder UV protection agent consisting solely of components (A) to (C) or components (A) to (F), but it is of course possible to add other ingredients separately as long as the UV protection effect and usability of the active ingredients are not lost and the UV protection agent is in solid powder form. The present invention may also be a solid powder cosmetic containing the above-mentioned UV protection agent. Examples of solid powder cosmetic products include, but are not limited to, powder foundations, skin tone control powders, and sunscreen powders. Each of the above components (A) to (F) will be described below.

[0029] [Component (A): UV Absorber] UV absorbers are substances that can protect the skin and other surfaces from UV rays by absorbing UV rays and converting them into heat energy. These substances are generally organic compounds. UV absorbers with a melting point of 110°C or lower are preferably used. In particular, UV absorbers that can absorb long-wavelength UV rays (UVA) in the wavelength range of 320 to 400 nm and / or medium-wavelength UV rays (UVB) in the wavelength range of 290 to 320 nm are used. Preferred examples of UV absorbers include ethylhexyl methoxycinnamate, polysilicone-15, bisethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoyl hexyl benzoate, and ethylhexyl triazone. These substances may also be used in combination or at different concentrations as UV absorbers. Considering the high ultraviolet absorption effect and stability, it is preferable to use one or both of ethylhexyl methoxycinnamate and bisethylhexyloxyphenol methoxyphenyl triazine as the ultraviolet absorber, and among these, ethylhexyl methoxycinnamate is particularly preferred.

[0030] Other examples of ultraviolet absorbers include t-butyl methoxydibenzoylmethane, ethylhexyl triazone, oxybenzone, oxybenzone-3, oxybenzone-4, oxybenzonesulfonic acid, octocrylene, ethylhexyl salicylate, 2-ethylhexyl salicylate, octyl salicylate, homomenthyl salicylate, terephthalylidene dicamphorsulfonic acid, drometrizole trisiloxane, phenylbenzimidazole sulfonic acid, ferulic acid, homosalate, homomenthyl salicylate, methylenebisbenzotriazolyltetramethylbutylphenol, and paramethoxycinnamic acid. 2-ethylhexyl para-methoxycinnamate, 2-ethoxyethyl para-methoxycinnamate, octyl para-methoxycinnamate, glyceryl di-para-methoxycinnamate mono-2-ethylhexanoate, hydroxymethoxybenzophenone sulfonic acid, amyl para-dimethylbenzoate, 2-ethylhexyl para-dimethylaminobenzoate, ethyl 4-[N,N-di(2-hydroxypropyl)amino]benzoate, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, 4-t-butyl-4'-methoxydibenzoylmethane, dimethicodiethyl benzalmalonate, and the like.

[0031] In addition, an auxiliary agent for the UV absorber may be added. When added together with the UV absorber, the auxiliary agent has the effect of increasing its stability and improving the feeling of application to the skin. In addition, as an oil-soluble component, the auxiliary agent also has the effect of uniformly dispersing the UV absorber. Examples of auxiliary agents for the UV absorber include cetyl 2-ethylhexanoate, caprylyl methicone, isotridecyl isononanoate, glyceryl tri-2-ethylhexanoate, and alkyl benzoate (C12-15).

[0032] The blending amount of the ultraviolet absorber is preferably 1 to 40 mass %, more preferably 3 to 30 mass %, and particularly preferably 5 to 15 mass %, based on the total amount of the ultraviolet protection agent.

[0033] [Component (B) Nonionic Surfactant with an HLB Value of 10 or More] The nonionic surfactant is blended primarily for the purpose of dispersing components such as an ultraviolet absorber in a bulk containing moisture before solidification and improving cohesion after solidification. The nonionic surfactant used is one that has an HLB value of 10 or more and exhibits hydrophilicity. The HLB value of the surfactant is sufficient as long as it is 10 or more, and there is no particular upper limit, but for example, the HLB value of the surfactant is preferably 10 to 16. Examples of nonionic surfactants include polyglycerin fatty acid esters, sorbitan fatty acid esters, glycerin fatty acid esters, propylene glycol fatty acid esters, polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene alkylphenols, polyoxyethylene sorbit fatty acid esters, polyoxyethylene alkylphenyl formaldehyde condensates, polyoxyethylene sterol and derivatives thereof, polyoxyethylene cholesterol ether, polyoxyethylene cholestanol ether, polyoxyethylene phytosterol ether and polyoxyethylene phytostanol ether, polyoxyethylene lanolin and derivatives thereof, polyoxyethylene beeswax derivatives, sugar esters, polyoxyethylene hydrogenated castor oil, and polyoxyethylene castor oil. In the examples described below, polyglyceryl-10 laurate, polyglyceryl-10 oleate, olive oil glycereth-8 esters, polysorbate 80, PEG-20 methyl glucose sesquistearate, polysorbate 60, polyoxyethylene (80) hydrogenated castor oil, polyoxyethylene (60) hydrogenated castor oil, and polyoxyethylene (20) hydrogenated castor oil are used as nonionic surfactants having an HLB value of 10 or more.

[0034] The HLB value of a nonionic surfactant is an actually measured value. The HLB value is a numerical value devised by W. C. Griffin and assigned to nonionic surfactants, and represents the balance in strength between the lipophilic group (alkyl group) and the hydrophilic group (ethylene oxide chain) of the nonionic surfactant. The HLB value is measured in accordance with the measurement of the HLB value by the emulsification method described in "Handbook - Cosmetics and Pharmaceutical Ingredients - Revised Edition," published by Nikko Chemicals Co., Ltd. on February 1, 1977, pages 854-855. Specifically, to determine the HLB value of a nonionic surfactant, the nonionic surfactant is combined with sorbitan monostearate (NIKKOL SS-10, HLB 4.7) as a standard emulsifier, and the total amounts of these two emulsifiers are kept constant while only the ratio is varied to emulsify liquid paraffin (required HLB 10.1), which is the substance to be emulsified. After leaving the mixture overnight, the optimal ratio of emulsifiers that provides stability is determined from the amount of creaming, turbidity, and water separation from the lower layer, and the HLB value x of the nonionic surfactant is calculated using the following formula (1): [Equation (1)] y = (x × amount used (mass %) + z × amount used (mass %)) / 100 In equation (1), "x" represents the HLB value of the nonionic surfactant, "y" represents the required HLB value of liquid paraffin, and "z" represents the HLB value of sorbitan monostearate (NIKKOL SS-10). The HLB value of liquid paraffin can be determined in a similar manner using a combination of sorbitan monostearate (NIKKOL SS-10, HLB 4.7) and POE sorbitan monostearate (NIKKOL TS-10, HLB 14.9).

[0035] Furthermore, it is preferable to select nonionic surfactants having a polyglycerin backbone or a sugar backbone. A polyglycerin backbone is a structure formed by the bonding of multiple glycerin molecules. Glycerin is a simple alcohol with three carbon atoms and three hydroxyl groups (-OH). In polyglycerin, these glycerin units are repeatedly bonded to form a highly hydrophilic backbone with many hydroxyl groups. A sugar backbone is a backbone based on sugar molecules such as monosaccharides and disaccharides. These sugar molecules have many hydroxyl groups and exhibit high hydrophilicity. Examples of nonionic surfactants having a polyglycerin backbone include polyglyceryl-10 laurate, polyglyceryl-10 oleate, olive oil glycereth-8 esters, and polyglyceryl-10 tristearate. Examples of nonionic surfactants having a sugar backbone include PEG-20 methylglucose sesquistearate, sorbitan sesquioleate, polysorbate 80, and polysorbate 60.

[0036] The blending amount of the nonionic surfactant is preferably 0.05 to 20 mass %, more preferably 0.1 to 10 mass %, and particularly preferably 0.5 to 5 mass %, based on the total amount of the UV protection agent.

[0037] [Component (C): Dispersibility Enhancer] The dispersibility enhancer is incorporated primarily for the purpose of dispersing components such as UV absorbers in the water-containing bulk before solidification and improving aggregation after solidification. The nonionic surfactant, component (B), is expected to have a similar effect to this dispersibility enhancer, but the combined use of a nonionic surfactant and a dispersibility enhancer can enhance the effect of improving aggregation and caking caused by the stickiness of the UV absorber. In particular, in the present invention, a water-soluble polymer having an acrylic acid moiety and / or a polysaccharide having a hydrophobic group with 12 or more carbon atoms is used as the dispersibility enhancer.

[0038] [Water-soluble polymer having acrylic acid moieties] A water-soluble polymer having acrylic acid moieties is a polymer containing an acrylic acid structure and has the property of being soluble in water. A polymer having acrylic acid moieties is a compound formed by polymerizing molecules having an acrylic acid skeleton, and includes polymers of acrylic acid, methacrylic acid, and their derivatives (acrylic acid esters, methacrylic acid esters, acrylates, methacrylates, etc.).

[0039] Examples of water-soluble polymers having acrylic acid moieties include (acrylates / beheneth-25 methacrylate) copolymer, (acrylates / steareth-20 methacrylate) copolymer, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, acrylates copolymer, and carbomer. The (acrylates / beheneth-25 methacrylate) copolymer is a copolymer composed of one or more monomers selected from acrylic acid, methacrylic acid, or simple esters thereof, and beheneth-25 methacrylate (an ester of methacrylic acid and beheneth-25). The (acrylates / steareth-20 methacrylate) copolymer is a copolymer composed of one or more monomers selected from acrylic acid, methacrylic acid, or simple esters thereof, and steareth-20 methacrylate (an ester of methacrylic acid and beheneth-20). (Sodium acrylate / sodium acryloyldimethyltaurate) copolymer is a copolymer of sodium acrylate and sodium acryloyldimethyltaurate. Acrylates copolymer is a copolymer composed of two or more monomers selected from alkyl acrylate (C1-C4), alkyl methacrylate (C1-C4), acrylic acid, and methacrylic acid. Carbomer is a polymer of acrylic acid with an acrylic acid backbone crosslinked with pentaerythritol allyl ether, sucrose allyl ether, or propylene allyl ether.

[0040] Other examples of water-soluble polymers having an acrylic acid moiety include (acrylates / C10-30 alkyl acrylate) crosspolymer and (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer.

[0041] [Polysaccharides Having Hydrophobic Groups with 12 or More Carbons] Polysaccharides having hydrophobic groups with 12 or more carbon atoms are polysaccharides in which hydrocarbon chains with 12 or more carbon atoms are bonded as hydrophobic groups. For example, when the hydrophobic group of a fatty acid such as stearic acid (18 carbon atoms) or lauric acid (12 carbon atoms) is bonded to a polysaccharide, the polysaccharide becomes a polysaccharide having hydrophobic groups with 12 or more carbon atoms. By having hydrophobic groups with 12 or more carbon atoms, hydrophilic and hydrophobic portions coexist in polysaccharides, resulting in amphiphilic properties. Therefore, by incorporating such polysaccharides into a bulk containing water before solidification, the hydrophobic groups bind to the oil and the hydrophilic portions bind to the water, stabilizing the mixture of oil and water. This improves the dispersibility of ingredients such as UV absorbers in the bulk.

[0042] An example of a polysaccharide having a hydrophobic group having 12 or more carbon atoms is stearoxyhydroxypropylmethylcellulose (18 carbon atoms). Stearoxyhydroxypropylmethylcellulose is a cellulose-based derivative in which a hydrophobic group derived from stearic acid is bonded to the cellulose. In the cosmetic field, it is used as an emulsion stabilizer and thickener to improve the texture of creams and lotions and to give a smooth feel to the skin.

[0043] Other examples of polysaccharides having a hydrophobic group having 12 or more carbon atoms include lauroyl hydroxypropyl cellulose (hydrophobic group: lauric acid, carbon number 12), stearoyl methyl glucamide (hydrophobic group: stearic acid, carbon number 18), hexadecyl benzyl modified hyaluronic acid (hydrophobic group: hexadecyl group, carbon number 16), cetearyl hydroxyethyl cellulose (hydrophobic group: cetearyl group, carbon number 16-18), myristoyl methyl glucamide (hydrophobic group: myristic acid, carbon number 14), and dodecyl glucoside (hydrophobic group: dodecane, carbon number 12).

[0044] The blending amount of the dispersibility promoter is preferably 0.005 to 10 mass %, more preferably 0.01 to 5 mass %, and particularly preferably 0.1 to 2 mass %, based on the total amount of the ultraviolet protection agent.

[0045] [Component (D): Polysaccharides] The polysaccharides are incorporated primarily for the purpose of imparting viscosity to the bulk before solidification and improving the stability of the UV protection agent before and after solidification. In particular, adding polysaccharides to the bulk can extend the duration for which components (A), (B), and (C) remain dispersed in water, thereby further improving the dispersibility of each component in the bulk. The polysaccharides are not particularly limited as long as they are water-soluble polysaccharides commonly used in cosmetics. Examples of polysaccharides include water-soluble cellulose derivatives and their salts, starch, and other natural polysaccharides. Examples of water-soluble cellulose derivatives and their salts include cellulose gum (sodium carboxymethylcellulose), hydroxypropyl methylcellulose, and carboxymethylcellulose. Examples of starches include seed starches such as rice starch, wheat starch, and corn starch, and root starches such as tapioca starch and potato starch. The starch may also be a mixture of compounds containing starch, such as a mixture of glycosyl trehalose, hydrogenated starch hydrolysate, and water. Examples of natural polysaccharides include xanthan gum and sodium hyaluronate. In particular, since the UV protection agent containing the polysaccharide is in the form of a solid powder, it is preferable to use a polysaccharide that is solid at 25°C. Specifically, examples of polysaccharides that are solid at 25°C include cellulose gum (sodium carboxymethylcellulose), hydroxypropyl methylcellulose, xanthan gum, and sodium hyaluronate. One or more of these polysaccharides may be blended.

[0046] The polysaccharide used as component (D) is preferably different from the polysaccharide having a hydrophobic group having 12 or more carbon atoms used as the dispersibility promoter for component (C). Specifically, it is preferable to use a polysaccharide other than a polysaccharide having a hydrophobic group having 12 or more carbon atoms as the polysaccharide for component (D). More specifically, it is preferable that the polysaccharide for component (D) is a hydrophilic polysaccharide having no hydrophobic group.

[0047] The blending amount of the polysaccharide is preferably 0.01 to 10% by mass, more preferably 0.03 to 5% by mass, and particularly preferably 0.05 to 1% by mass, based on the total amount of the UV protection agent.

[0048] [Component (E): UV Scattering Agent] UV scattering agents refer to particulate materials that can reflect or scatter UV rays to protect the skin and other surfaces from UV rays. These particulate materials are generally inorganic. Examples of UV scattering agents include titanium oxide, zinc oxide, cerium oxide, and iron oxide. These materials may also be microparticulated or composited to form UV scattering agents. Considering the high UV scattering effect, it is preferable to use one or both of titanium oxide and zinc oxide as the UV scattering agent. The UV protection effect can be improved by using a UV absorber and a UV scattering agent in combination. Furthermore, because UV scattering agents have certain oil and water absorption properties, adding them to the bulk increases the viscosity of the slurry. This extends the duration of the dispersion of components (A), (B), and (C) in water, further improving the dispersibility of each component in the bulk.

[0049] Furthermore, a hydrophobized UV scattering agent may be used as component (E). A hydrophobized UV scattering agent is an agent that has been treated to introduce hydrophobic groups into the surface of an inorganic substance that basically has UV scattering properties. Preferred examples of hydrophobization treatments include dimethicone treatment, hydrogen dimethicone treatment, stearic acid treatment, triethoxycaprylylsilane treatment, triisostearoyl titanate treatment, lecithin treatment, and N-acylamino acid treatment. Dimethicone treatment is a treatment in which methylpolysiloxane is introduced into the surface of an inorganic substance, imparting hydrophobicity derived from the siloxane skeleton to the inorganic substance. Hydrogen dimethicone treatment is a treatment in which a linear monomethylsiloxane polymer, in which some of the methyl groups of dimethicone are replaced with hydrogen, is introduced into the surface of an inorganic substance, imparting hydrophobicity derived from the siloxane chain to the inorganic substance. Stearic acid treatment is a process in which stearic acid (a C18 saturated fatty acid) is immobilized on the surface of an inorganic substance, imparting hydrophobicity derived from the alkyl chain to the inorganic substance. Triethoxycaprylylsilane treatment is a process in which a silane coupling agent (triethoxycaprylylsilane) having a capryl group (a C8 alkyl group) and an ethoxy group is introduced to the surface of the inorganic substance to hydrophobize the inorganic substance. Triisostearoyl titanate treatment is a process in which an isostearoyl group (a branched C18 alkyl group) is immobilized on the surface of the inorganic substance, imparting hydrophobicity derived from the isostearoyl group to the inorganic substance. Lecithin treatment is a process in which lecithin, a natural hydrophilic phospholipid, is adsorbed onto an inorganic substance, and the fatty acid residue (hydrophobic portion) faces outward, thereby making the inorganic substance hydrophobic. N-acylamino acid treatment is a treatment to hydrophobize an inorganic substance by immobilizing a hydrophobic amino acid derivative, in which an acyl group (such as a fatty acid residue) is introduced into an amino acid, on the surface of the inorganic substance. The hydrophobization treatment performed on such an ultraviolet scattering agent is not limited to one type, and two or more types may be performed in combination. In addition to the above-mentioned examples, the hydrophobization treatment may also be known treatments such as isostearic acid treatment, aluminum stearate treatment, magnesium stearate treatment, simethicone treatment, octyltriethoxysilane treatment, and methylhydrogenpolysiloxane treatment.

[0050] The UV scattering agent (including hydrophobized UV scattering agents; the same applies hereinafter) preferably has an average particle size of 100 nm or less. There is no particular lower limit on the average particle size, but it is sufficient as long as it is 5 nm or more, and more preferably 10 nm or more. In this specification, "average particle size" refers to the average particle size value at 50% of the cumulative volume measured using a laser diffraction / scattering particle size distribution analyzer. The UV protection effect of the UV protection agent can be enhanced by using a UV scattering agent with a relatively small average particle size of 1 to 100 nm. In addition, UV scattering agents with relatively small particle sizes have a larger surface area per weight, which increases their oil absorption effect and water absorption effect, and adding them to the bulk further increases the slurry viscosity. This allows the duration of the dispersion state of components (A), (B), and (C) in water to be further extended.

[0051] Furthermore, in the present invention, inorganic substances with UV scattering effects, such as titanium oxide and zinc oxide, are used as UV scattering agents rather than as pigments. Therefore, the UV scattering agent is blended at an appropriate particle size and content so that the UV protection agent or cosmetic containing the same can exhibit a high UV scattering effect. As mentioned above, the average particle size of the UV scattering agent is preferably 5 nm to 100 nm, and the UV scattering agent is preferably contained in the UV protection agent or cosmetic at a content of 3% by mass or more. Specifically, the total amount of the UV scattering agent is preferably 1 to 50% by mass, and particularly preferably 3 to 30% by mass.

[0052] The blending amount of the ultraviolet scattering agent is preferably 1 to 60 mass %, more preferably 2 to 50 mass %, and particularly preferably 5 to 40 mass %, based on the total amount of the ultraviolet protection agent.

[0053] [Component (F): Silica] Silica is added mainly for the purpose of suppressing the occurrence of agglomerates and caking and improving the dispersibility of each component in the bulk. Silica is silicon dioxide (SiO ２). Silica is a relatively fine powder and has a high oil absorption capacity. Therefore, when incorporated into solid powder cosmetics, it has the effect of absorbing excess sebum from the skin and reducing shine and oiliness. In the present invention, it is preferable to use silica with a high oil absorption capacity. For example, the oil absorption capacity of silica is preferably 20 ml / 100 g or more or 30 ml / 100 g or more, more preferably 100 ml / 100 g or more or 150 ml / 100 g or more, and particularly preferably 200 ml / 100 g or more or 250 ml / 100 g or more. The oil absorption capacity of silica can be measured by a measurement method in accordance with JIS K 5101.

[0054] The amount of silica blended is preferably 0.5 to 20 mass %, more preferably 1 to 15 mass %, and particularly preferably 3 to 10 mass %, based on the total amount of the ultraviolet protection agent.

[0055] [Optional Components] In addition to the components described above, the UV protection agent according to the present invention may contain one or more optional components commonly used in the field of cosmetics. Examples of the optional components include moisturizers, surfactants, water-soluble polymers, liquid oils, oil-soluble gelling agents, clay minerals, resins, film-forming agents, UV absorbers, powders, pigments, dyes, coloring materials, preservatives, antibacterial agents, antioxidants, salts, pH adjusters, chelating agents, fragrances, cooling agents, antiperspirants, anti-inflammatory agents, skin activators, skin-beautifying components, and various extracts.

[0056] [Density] As described below, the UV protection agent according to the present invention is preferably freeze-dried to form a solid powder. In freeze-drying, moisture is almost completely removed by sublimation during the process, and therefore the UV protection agent solidified by freeze-drying has a characteristic that its density is low. Specifically, the density of the freeze-dried UV protection agent is 0.3 to 1.5 g / cm ３ is preferably 0.5 to 1.4 g / cm ３ More preferably, it is 0.7 to 1.2 g / cm ３ It is particularly preferred that:

[0057] [Content Ratio] The content ratio of component (A) ultraviolet absorber to component (B) nonionic surfactant is preferably component (A) / component (B) = 0.10 to 100. In particular, component (A) / component (B) is preferably 0.5 to 30, and more preferably 1.5 to 15. If the component (A) / component (B) ratio is smaller than the preferred range, the stickiness of component (B) makes the powder more likely to aggregate and caking occur. Furthermore, if the component (A) / component (B) ratio is larger than the preferred range, the dispersion state of component (A) becomes worse than desired, making aggregation and caking more likely to occur. Therefore, it is preferable to blend them within the above range.

[0058] Furthermore, the ratio of the content of component (A) UV absorber to component (C) dispersibility enhancer is preferably component (A) / component (C) = 0.50 to 1000. In particular, component (A) / component (C) is preferably 1 to 300, and more preferably 5 to 150. If the component (A) / component (C) ratio is smaller than the preferred range, the dispersion stabilization effect of component (C) can be obtained, but the amount of treatable particles may decrease due to the presence of a large amount of component (C) between powder particles, which may cause caking. Furthermore, if the component (A) / component (C) ratio is larger than the preferred range, the dispersion state of component (A) becomes worse than desired, making aggregation and caking more likely to occur. Therefore, it is preferable to blend them within the above range.

[0059] Furthermore, the ratio of the content of component (A) UV absorber to component (E) UV scattering agent is preferably component (A) / component (E) = 0.01 to 10. In particular, component (A) / component (E) is preferably 0.05 to 5, and more preferably 0.1 to 1. If the component (A) / component (E) ratio is smaller than the preferred range, the coagulation tendency of component (E) may increase, resulting in the formation of aggregates. The amount of torr may also decrease, which may cause caking. If the component (A) / component (E) ratio is larger than the preferred range, the increase in the viscosity of the slurry due to the addition of component (E) may decrease, resulting in a worse dispersion state of component (A) than is desirable, making aggregation and caking more likely to occur. Therefore, it is preferable to blend them within the above range.

[0060] Furthermore, the ratio of the content of component (A) UV absorber to component (E1) UV scattering agent having an average particle size of 100 nm or less is preferably component (A) / component (E1) = 0.02 to 10. In particular, component (A) / component (E1) is preferably 0.1 to 5, and more preferably 0.2 to 2. If the component (A) / component (E1) ratio is smaller than the preferred range, the coagulation tendency of component (E1) increases, which may result in the formation of aggregates. The amount of torr may also decrease, which may cause caking. If the component (A) / component (E1) ratio is larger than the preferred range, the increase in the viscosity of the slurry due to the addition of component (E1) decreases, the dispersion state of component (A) becomes worse than desired, and aggregation and caking may become more likely to occur. Therefore, it is preferable to blend them within the above range.

[0061] [2. Manufacturing Method of UV Protection Agent] Next, a manufacturing method of a solid powder UV protection agent will be described. The manufacturing method of the UV protection agent is mainly divided into a mixing step of obtaining a mixture of main components and a freeze-drying step of freeze-drying the obtained mixture.

[0062] In the mixing step, the aforementioned components (A) to (F) are mixed to prepare a slurry bulk before freeze-drying. In the mixing step, the components (A) to (F) may be mixed all at once, but it is preferable to mix them in the following steps:

[0063] First, in the mixing step, a portion of the purified water and component (D) polysaccharide are mixed and stirred, and then heated at a predetermined temperature (approximately 50 to 100°C) to obtain a first mixture. Meanwhile, a neutralizer such as triethanolamine is added to the remainder of the purified water, if necessary, and stirred. Then, component (C) dispersibility promoter is added and stirred to obtain a second mixture. Then, the first mixture, the second mixture, and component (B) a nonionic surfactant with an HLB value of 10 or more are mixed and stirred to obtain a third mixture (approximately 50 to 100°C). Component (A) UV absorber is added to the third mixture obtained here and stirred to obtain a fourth mixture, which is then emulsified. This fourth mixture is then cooled (approximately 20 to 40°C). Meanwhile, component (E) UV scattering agent, component (F) silica, optionally mica, and optionally iron oxide are mixed and pulverized to obtain a fifth mixture. The fourth and fifth mixtures are then stirred to obtain a sixth mixture. This produces a bulk UV protection agent.

[0064] Here, the case where component (A) UV absorber is added to a mixture (third mixture) of component (D) polysaccharide, component (C) dispersibility enhancer, and component (B) nonionic surfactant has been described. However, this is not limiting. For example, component (A) UV absorber may not be added to the third mixture, but may instead be added to a mixture (fifth mixture) of component (E) UV scattering agent and component (F) silica, mica, and iron oxide.

[0065] Next, the freeze-drying process will be described. The freeze-drying process is a process in which the bulk obtained in the mixing process is freeze-dried to form a solid powder. In the freeze-drying process, the slurry bulk is first filled into a mold (form) and frozen to obtain a frozen product. The temperature during freezing is preferably −20°C or lower, and particularly preferably, for example, −50 to −20°C or −40 to −30°C. The obtained frozen product is then dried at a low temperature in a reduced pressure environment using a vacuum dryer. The atmospheric pressure condition for drying the frozen product may be, for example, 100 Pa or lower, and is preferably maintained at 1 to 100 Pa or 10 to 80 Pa. The temperature condition for drying the frozen product may be −10°C or lower, at which point the water becomes solid (ice), and is preferably maintained at, for example, −50 to −20°C. In this way, in a low-temperature environment where the water in the bulk becomes solid, by lowering the air pressure so that the boiling point is −50 to 30°C, more preferably −50 to −20°C, the water does not become liquid but changes from a solid to a gas (sublimes). In this way, the freeze-drying process can remove water from the bulk, resulting in a solid powder UV protection agent. Note that the freeze-drying process is publicly known, and other details may be determined according to publicly known conditions.

[0066] ■ 2. UV Protection Agent Containing UV Scattering Agent ■ [3. UV Protection Agent] The UV protection agent of the present invention is a solid powder agent obtained by solidifying powdered components. The UV protection agent of the present invention contains at least the following components (a) to (D): (a) a hydrophobized UV scattering agent, (B) a nonionic surfactant having an HLB value of 10 or more, and (D) a polysaccharide as a dispersibility maintaining agent.

[0067] The present invention may be, for example, a solid powder UV protection agent consisting of components (a), (B), and (D). However, as long as the UV protection effect and usability of the active ingredients are not lost and the UV protection agent is in solid powder form, it is naturally possible to add other ingredients separately. The present invention may also be a solid powder cosmetic containing the above-mentioned UV protection agent. Examples of solid powder cosmetic products include, but are not limited to, powder foundations, skin color control powders, and sunscreen powders. The explanations for each of the above components (a), (B), and (D) refer to the explanations for (E) UV scattering agent, (B) nonionic surfactant with an HLB value of 10 or more, (D) polysaccharide, etc. in [1. UV Protection Agent] above. The explanation for the method for producing a solid powder UV protection agent consisting of components (a), (B), and (D) refer to the explanations in [2. Method for producing UV protection agent] above.

[0068] [Density] As described below, the UV protection agent according to the present invention is preferably freeze-dried to form a solid powder. In freeze-drying, moisture is almost completely removed by sublimation during the process, and therefore the UV protection agent solidified by freeze-drying has a characteristic that its density is low. Specifically, the density of the freeze-dried UV protection agent is 0.3 to 1.5 g / cm ３ is preferably 0.5 to 1.4 g / cm ３ It is more preferable that the ratio is 0.7 to 1.2, and particularly preferable that the ratio is 0.7 to 1.2.

[0069] [1. UV Protection Agent (UV Absorber)] Tables 1 to 9 show the blending ratios of each component blended in Examples and Comparative Examples of the UV protection agent according to the present invention. The blending ratios are in mass %.

[0070]

[0071]

[0072]

[0073]

[0074]

[0075]

[0076]

[0077]

[0078]

[0079] In the above table, the numerical values ​​for the ultraviolet scattering agent shown in parentheses, such as "(10 nm)", are the average particle size of the scattering material. In the above table, the * marks are footnote numbers indicating the brand or product name of each component, and the details are as follows.(Footnotes) *1 NIKKOL Decaglyn 1-L (Nikko Chemicals Co., Ltd.) *2 NIKKOL Decaglyn 1-OV (Nikko Chemicals Co., Ltd.) *3 RESPLANTA OLIVE MB (SHARON PERSONAL CARE S.R.L.) *4 Nonion OT-221R (NOF Corporation) *5 NIKKOL TS-10V (Nikko Chemicals Co., Ltd.) *6 NIKKOL HCO-80 (Nikko Chemicals Co., Ltd.) *7 NIKKOL HCO-60 (Nikko Chemicals Co., Ltd.) *8 NIKKOL HCO-20 (Nikko Chemicals Co., Ltd.) *9 Novethix L-10 Polymer (manufactured by Lubrizol Co., Ltd.), polymer purity: 30% * 10 Accurin (registered trademark) 22 (manufactured by Dow Chemical Japan Co., Ltd.), polymer purity: 30% * 11 Sangelose 60L (manufactured by Daido Chemical Industry Co., Ltd.), polymer purity: 100% * 12 SIMULGEL EG QD (manufactured by SEPPIC Corporation), polymer purity: 37.5% * 13 SALCARE SC81UP (manufactured by BASF Corporation), polymer purity: 30% * 14 CARBOPOL 980 (manufactured by Lubrizol Co., Ltd.), polymer purity: 100% * 15 CMC Daicel 1170 (manufactured by Daicel Miraize Co., Ltd.) * 16 Metrose 65SH4000 (manufactured by Shin-Etsu Chemical Co., Ltd.) * 17 TORNARE (manufactured by Hayashibara Co., Ltd.) * 18 MZ-500 (manufactured by Teika Co., Ltd.) * 19 MZY-505M (manufactured by Teika Co., Ltd.) * 20 MT-500SA (manufactured by Teika Co., Ltd.) * 21 MT-01 (manufactured by Teika Co., Ltd.) * 22 MTY-500SAM (manufactured by Teika Co., Ltd.) * 23 ASL-1 TiO2 MP-1133 (manufactured by Daito Chemical Industry Co., Ltd.) * 24 CR-50 (manufactured by Ishihara Sangyo Kaisha, Ltd.) * 25 XZ-300F-LP (manufactured by Sakai Chemical Industry Co., Ltd.) * 26 XZ-300F (manufactured by Sakai Chemical Industry Co., Ltd.) * 27 Cosme Silica CQ4 (manufactured by Fuji Silysia Chemical Ltd.) * 28 Sunsphere H-121 (manufactured by AGC Si-Tech Co., Ltd.) * 29 Sunsphere NP-30 (manufactured by AGC Si-Tech Co., Ltd.).

[0080] Example 1 contains (A) 7% ethylhexyl methoxycinnamate as an ultraviolet absorber, and (B) polyglyceryl-10 laurate (HLB value: (15.5) at 2%, (C) 0.1% of (acrylates / beheneth-25 methacrylate) copolymer as a dispersibility promoter, and 0.1% of triethanolamine as a neutralizer, (D) 0.1% of cellulose gum (sodium carboxymethylcellulose) as a polysaccharide, (E) 10% of zinc oxide (25 nm) and 20% of titanium oxide (250 nm) treated with dilauroyl glutamine sodium, lysine, magnesium chloride, and aluminum hydroxide as an ultraviolet scattering agent, (F) 3% of silica having an oil absorption of 290 ml / 100 g, 54.2% of mica, and 3.5% of an iron oxide mixture (red iron oxide / yellow iron oxide / black iron oxide). The density of the finally obtained ultraviolet protection agent was 0.93 g / cm. ３ The ultraviolet protection agent of Example 1 was produced by the production process I described below.

[0081] In Example 2, an ultraviolet protection agent having the same formulation as in Example 1 was produced by a production process II different from that in Example 1. Production process II will be described later.

[0082] In Example 3, the content of ethylhexyl methoxycinnamate in Example 1 was changed to 10%, and the other main components were the same as in Example 1. The density of the finally obtained UV protection agent was 1.02 g / cm ３ It was.

[0083] Example 4 contained 10% polysilicone-15 instead of ethylhexyl methoxycinnamate in Example 1, and the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 1.02 g / cm ３ It was.

[0084] Example 5 contained 3% bisethylhexyloxyphenol methoxyphenyl triazine instead of the ethylhexyl methoxycinnamate of Example 1, and contained 7% 2-ethylhexanoate as an auxiliary, with the other main components being the same as those of Example 1. The density of the finally obtained UV protection agent was 1.02 g / cm３ It was.

[0085] Example 6 contained 3% diethylaminohydroxybenzoylhexyl benzoate instead of ethylhexyl methoxycinnamate in Example 1, and contained 7% 2-ethylhexanoate as an auxiliary, with the other main components being the same as those in Example 1. The density of the finally obtained UV protection agent was 1.03 g / cm ３ It was.

[0086] Example 7 contained 3% ethylhexyl triazone instead of ethylhexyl methoxycinnamate in Example 1, and contained 7% cetyl 2-ethylhexanoate as an auxiliary, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 1.02 g / cm ３ It was.

[0087] In Example 8, the content of ethylhexyl methoxycinnamate in Example 1 was changed to 6%, and in addition, bisethylhexyloxyphenol methoxyphenyl triazine was contained at 2% and diethylaminohydroxybenzoyl hexyl benzoate was contained at 2%, and the other main components were the same as in Example 1. The density of the finally obtained UV protection agent was 1.07 g / cm ３ It was.

[0088] Example 9 contained 2% polyglyceryl-10 oleate instead of polyglyceryl-10 laurate in Example 1, and the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 0.94 g / cm ３ It was.

[0089] Example 10 contained 2% olive oil glycereth-8 esters instead of polyglyceryl-10 laurate in Example 1, and the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 0.94 g / cm ３ It was.

[0090] Example 11 contained 2% polysorbate 80 instead of polyglyceryl-10 laurate in Example 1, and the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 0.90 g / cm ３ It was.

[0091] Example 12 contained 2% PEG-20 methyl glucose sesquistearate instead of polyglyceryl-10 laurate in Example 1, and the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 0.93 g / cm ３ It was.

[0092] Example 13 contained 2% polysorbate 60 instead of polyglyceryl-10 laurate in Example 1, and the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 0.94 g / cm ３ It was.

[0093] Example 14 contained 2% polyoxyethylene (80) hydrogenated castor oil instead of polyglyceryl-10 laurate in Example 1, and the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 1.00 g / cm ３ It was.

[0094] Example 15 contained 2% polyoxyethylene (60) hydrogenated castor oil instead of polyglyceryl-10 laurate in Example 1, and the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 1.02 g / cm ３ It was.

[0095] Example 16 contained 2% polyoxyethylene (20) hydrogenated castor oil instead of polyglyceryl-10 laurate in Example 1, and the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 1.04 g / cm ３ It was.

[0096] Example 17 contained 0.1% of acrylates / steareth-20 methacrylate copolymer instead of the acrylates / beheneth-25 methacrylate copolymer of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.91 g / cm ３ It was.

[0097] Example 18 contained 0.1% stearoxyhydroxypropylmethylcellulose instead of the (acrylates / beheneth-25 methacrylate) copolymer of Example 1, did not contain triethanolamine (neutralizer), and other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.93 g / cm ３ It was.

[0098] Example 19 contained 0.1% of (sodium acrylate / sodium acryloyldimethyltaurate) copolymer instead of the (acrylates / beheneth-25 methacrylate) copolymer of Example 1, did not contain triethanolamine (neutralizer), and other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.94 g / cm ３ It was.

[0099] Example 20 contained 0.1% of an acrylates copolymer instead of the (acrylates / beheneth-25 methacrylate) copolymer of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.91 g / cm ３ It was.

[0100] Example 21 contained 0.1% carbomer instead of the (acrylates / beheneth-25 methacrylate) copolymer of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.93 g / cm ３ It was.

[0101] Example 22 contained 0.1% hydroxypropyl methylcellulose instead of the cellulose gum of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.92 g / cm ３ It was.

[0102] In Example 23, xanthan gum was used at 0.1% instead of the cellulose gum of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.90 g / cm ３ It was.

[0103] Example 24 contained 0.1% sodium hyaluronate instead of the cellulose gum of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.91 g / cm ３ It was.

[0104] In Example 25, a mixture of glycosyltrehalose, hydrogenated starch hydrolysate, and water was contained at 0.1% instead of the cellulose gum of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.89 g / cm ３ It was.

[0105] In Example 26, the cellulose gum of Example 1 was not blended, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.92 g / cm ３ It was.

[0106] Example 27 contained 10% dimethicone-treated zinc oxide (25 nm) instead of the zinc oxide (25 nm) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.83 g / cm ３ It was.

[0107] Example 28 contained 10% triethoxycaprylylsilane / dimethicone-treated zinc oxide (25 nm) instead of the zinc oxide (25 nm) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.85 g / cm３ It was.

[0108] Example 29 contained 10% aluminum hydroxide / hydrated silica-treated titanium oxide (35 nm) instead of the zinc oxide (25 nm) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.92 g / cm ３ It was.

[0109] Example 30 contained 10% stearic acid / Al hydroxide treated titanium oxide (10 nm) instead of the zinc oxide (25 nm) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.88 g / cm ３ It was.

[0110] Example 31 contained 10% dimethicone, aluminum hydroxide, and hydrous silica-treated titanium oxide (35 nm) instead of the zinc oxide (25 nm) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.87 g / cm ３ It was.

[0111] In Example 32, the content of zinc oxide (25 nm) in Example 1 was changed to 30%, and instead, sodium dilauroyl glutamate, lysine, magnesium chloride, and titanium oxide (250 nm) treated with aluminum hydroxide were not blended, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 1.01 g / cm ３ It was.

[0112] Example 33 contained 20% aluminum hydroxide-treated titanium oxide (250 nm) instead of the sodium dilauroyl glutamate, lysine, magnesium chloride, and aluminum hydroxide-treated titanium oxide (250 nm) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained ultraviolet protection agent was 0.99 g / cm ３ It was.

[0113] Example 34 contained 20% hydrogen dimethicone-treated zinc oxide (300 nm) instead of the sodium dilauroyl glutamate, lysine, magnesium chloride, and aluminum hydroxide-treated titanium oxide (250 nm) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.86 g / cm ３ It was.

[0114] Example 35 contained 20% zinc oxide (300 nm) instead of the sodium dilauroyl glutamate, lysine, magnesium chloride, and aluminum hydroxide-treated titanium oxide (250 nm) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.98 g / cm ３ It was.

[0115] In Example 36, the content of the sodium dilauroyl glutamate, lysine, magnesium chloride, and aluminum hydroxide-treated titanium oxide (250 nm) in Example 1 was changed to 30%, and instead zinc oxide (25 nm) was not blended, but the other main components were the same as those in Example 1. The density of the finally obtained UV protection agent was 0.86 g / cm ３ It was.

[0116] In Example 37, the zinc oxide (25 nm) and the titanium oxide (250 nm) treated with sodium dilauroyl glutamate, lysine, magnesium chloride, and aluminum hydroxide of Example 1 were not blended, and the other main components were the same as those of Example 1. Note that the amount of mica was increased instead of blending the ultraviolet scattering agent. The density of the finally obtained ultraviolet protection agent was 0.88 g / cm ３ It was.

[0117] Example 38 contained 3% silica (oil absorption: 150 ml / 100 g) instead of the silica (oil absorption: 290 ml / 100 g) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.93 g / cm ３ It was.

[0118] Example 39 contained 3% silica (oil absorption: 30 ml / 100 g) instead of the silica (oil absorption: 290 ml / 100 g) of Example 1, and the other main components were the same as those of Example 1. The density of the finally obtained UV protection agent was 0.86 g / cm ３ It was.

[0119] In Example 40, the silica (oil absorption: 290 ml / 100 g) of Example 1 was not blended, and the other main components were the same as those of Example 1. The density of the finally obtained ultraviolet protection agent was 0.83 g / cm ３ It was.

[0120] In Example 41, the content of ethylhexyl methoxycinnamate in Example 1 was changed to 0.5%, and instead 6.5% of cetyl 2-ethylhexanoate was contained as an auxiliary agent, and the content of polyglyceryl-10 laurate was changed to 5%, with the other main components being the same as in Example 1. The density of the finally obtained UV protection agent was 1.02 g / cm ３ It was.

[0121] In Example 42, the content of ethylhexyl methoxycinnamate in Example 1 was changed to 10%, the content of polyglyceryl-10 laurate was changed to 0.1%, and the other main components were the same as in Example 1. The density of the finally obtained UV protection agent was 1.02 g / cm ３ It was.

[0122] In Example 43, the content of ethylhexyl methoxycinnamate in Example 1 was changed to 0.5%, and instead 6.5% of cetyl 2-ethylhexanoate was contained as an auxiliary agent, and further the content of (acrylates / beheneth-25 methacrylate) copolymer was changed to 1%, and the content of triethanolamine (neutralizer) was changed to 1%, with the other main components being the same as in Example 1. The density of the finally obtained UV protection agent was 1.12 g / cm ３ It was.

[0123] In Example 44, the content of ethylhexyl methoxycinnamate in Example 1 was changed to 10%, the content of (acrylates / beheneth-25 methacrylate) copolymer was changed to 0.01%, and the content of triethanolamine (neutralizer) was changed to 0.01%, and the other main components were the same as in Example 1. The density of the finally obtained UV protection agent was 0.98 g / cm ３ It was.

[0124] In Example 45, the content of ethylhexyl methoxycinnamate in Example 1 was changed to 0.5%, and instead 6.5% of cetyl 2-ethylhexanoate was contained as an auxiliary agent, and further the content of zinc oxide (25 nm) was changed to 25%, and the content of sodium dilauroyl glutamate, lysine, magnesium chloride, and titanium oxide (250 nm) treated with aluminum hydroxide was changed to 25%, with the other main components being the same as in Example 1. The density of the finally obtained UV protection agent was 1.06 g / cm ３ It was.

[0125] In Example 46, the content of ethylhexyl methoxycinnamate in Example 1 was changed to 10%, the content of zinc oxide (25 nm) was changed to 2.5%, and the content of sodium dilauroyl glutamate, lysine, magnesium chloride, and aluminum hydroxide-treated titanium oxide (250 nm) was changed to 5%, with the other main components being the same as in Example 1. The density of the finally obtained UV protection agent was 0.88 g / cm ３ It was.

[0126] In Example 47, the content of ethylhexyl methoxycinnamate in Example 1 was changed to 10%, and polysilicone-15 was further added at 10%, but instead the content of zinc oxide (25 nm) was changed to 2%, and sodium dilauroyl glutamate, lysine, magnesium chloride, and aluminum hydroxide-treated titanium oxide (250 nm) were not added, with the other main components being the same as in Example 1. The density of the finally obtained UV protection agent was 0.76 g / cm ３ It was.

[0127] As described above, Examples 1 to 47, except for Examples 26, 37, and 40, contained component (A) an ultraviolet absorber, component (B) a nonionic surfactant with an HLB of 10 or more, component (C) a dispersibility enhancer, component (D) a polysaccharide, component (E) an ultraviolet scattering agent, and component (F) silica. Example 26 did not contain component (D) a polysaccharide, but contained the other components (A) to (C), (E), and (F). Example 37 did not contain component (E) an ultraviolet scattering agent, but contained the other components (A) to (D), and (F). Example 40 did not contain component (F) silica, but contained the other components (A) to (E).

[0128] Comparative Example 1 did not contain (A) the ultraviolet absorber, specifically ethylhexyl methoxycinnamate, and the other main components were the same as those of Example 1.

[0129] Comparative Example 2 did not contain (A) the ultraviolet absorber, specifically ethylhexyl methoxycinnamate, but contained 7% of the auxiliary agent cetyl 2-ethylhexanoate, and the other main components were the same as those of Example 1.

[0130] Comparative Example 3 did not contain (B) the nonionic surfactant, specifically polyglyceryl-10 laurate, and the other main components were the same as those of Example 1.

[0131] Comparative Example 4 did not contain (B) a nonionic surfactant with an HLB of 10 or more, specifically polyglyceryl-10 laurate, but instead contained polyglyceryl-10 tristearate with an HLB of 7.5, and the other main components were the same as those of Example 1.

[0132] Comparative Example 5 did not contain (B) a nonionic surfactant with an HLB of 10 or more, specifically polyglyceryl-10 laurate, but instead contained sorbitan sesquioleate with an HLB of 3.7, and the other main components were the same as those of Example 1.

[0133] Comparative Example 6 did not contain (B) a nonionic surfactant having an HLB of 10 or more, specifically polyglyceryl-10 laurate, but contained lecithin instead, and the other main components were the same as those of Example 1.

[0134] Comparative Example 7 did not contain (C) the dispersibility enhancer, specifically (acrylates / beheneth-25 methacrylate) copolymer, and did not contain triethanolamine (neutralizing agent) which was blended in conjunction with the blending of (C) the dispersibility enhancer, and the other main components were the same as those of Example 1.

[0135] Each example, except for Example 2, was produced according to the following production process I. <Production Process I> (1) Component (D) was added to a portion of purified water, stirred, and then heated to 80°C to obtain a mixture. (2) Triethanolamine (neutralizing agent) was added to the remaining purified water and stirred, and then component (C) was added and stirred to obtain a mixture. (3) The mixture (2) and component (B) were added to the mixture (1) and stirred to obtain a mixture (80°C). (4) Component (A) was slowly added to the mixture (3) while stirring to obtain an emulsion (80°C), which was then cooled (35°C). (5) Component (E), component (F), mica, and iron oxide were mixed and pulverized to obtain a mixture. (6) The mixture (5) was added to the emulsion (4) and stirred to obtain a bulk. (7) The bulk (6) was poured into a metal dish and flash-frozen. The temperature inside the flash freezer was set to -40°C, and the cooling time was 60 minutes. (8) The flash frozen sample obtained in (7) above was freeze-dried in a vacuum dryer while maintaining the frozen state, to obtain the final UV protection agent. The temperature inside the vacuum dryer was set to -40°C, and the air pressure was set to 50 Pa.

[0136] In addition, since Examples 18 and 19 did not contain triethanolamine (neutralizing agent), the addition of triethanolamine (neutralizing agent) was omitted in the above step (2). In Example 26, since component (D) was not contained, the above step (1) was omitted. In addition, in Example 37, since component (E) was not contained, the addition of component (E) was omitted in the above step (5). In addition, in Example 40, since component (F) was not contained, the addition of component (F) was omitted in the above step (5).

[0137] Each comparative example was basically produced using the same production process I as in Example 1 described above. However, since Comparative Example 1 did not contain component (A), step (4) was omitted, and the mixture (5) was added to the mixture (3) and stirred to obtain a bulk. Furthermore, Comparative Example 3 did not contain component (B), so addition of component (B) was omitted in step (3). Furthermore, Comparative Example 7 did not contain component (C) and triethanolamine (neutralizing agent), so in step (3), the remainder of the purified water and component (B) were added to the mixture (1) and stirred to obtain a mixture.

[0138] Example 2 was produced using the following production process II. <Production Process II> (1) Component (E), component (F), mica, and iron oxide were mixed to obtain a mixture. (2) Component (A) was added to the mixture (1), and the mixture was mixed and pulverized to obtain a mixture. (3) Component (D) was added to a portion of the purified water, stirred, and then heated to 80°C to obtain a mixture. (4) Triethanolamine (neutralizing agent) was added to the remainder of the purified water and stirred, and then component (C) was added and stirred to obtain a mixture. (5) The mixture (4) and component (B) were added to the mixture (3) and stirred to obtain a mixture (80°C). (6) The mixture (2) was added to the mixture (5) and stirred to obtain a bulk, which was then cooled as necessary (35°C). (7) The bulk obtained in (6) was poured into a metal dish and flash-frozen. The temperature inside the flash freezer was set to -40°C, and the cooling time was 60 minutes. (8) The quick-frozen sample obtained in (7) above was freeze-dried in a vacuum dryer while maintaining the frozen state, to obtain the final UV protection agent. The temperature inside the vacuum dryer was set to −40° C. and the pressure was set to 50 Pa.

[0139] As shown in the above tables, the caking suppression effect, aggregation suppression effect, adhesion to the skin, and coating uniformity on the skin were measured or evaluated for each example and comparative example. The methods for measuring or evaluating each effect or performance are as follows.

[0140] [Caking Inhibition Effect] A sample of the UV protection agent according to each Example and Comparative Example was rubbed against a mat, and the number of times until caking occurred was counted. The mat was made of NBR (Nitrile Butadiene Rubber). When the sample was rubbed with the mat, it was determined that caking had occurred when no bulk adhered to the rubbed mat. The caking inhibition effect was rated A to D according to the following criteria: (Judgment Criteria) A: No caking occurred even after rubbing 100 times or more B: Caking occurred after rubbing 60 to 99 times C: Caking occurred after rubbing 30 to 59 times D: Caking occurred after rubbing less than 30 times

[0141] [Agglomeration Inhibition Effect] A sample of the UV protection agent according to each Example and Comparative Example was rubbed against a mat, and the number of times it was rubbed until agglomerates (lumps of powder) were generated was counted. The mat was made of NBR material. The occurrence of agglomerates was judged to be the point at which agglomerates (lumps) of powder were generated. The aggregation inhibition effect was judged from A to D according to the following criteria: (Judgment Criteria) A: No powder lumps (lumps) were generated even after rubbing 100 times or more B: Powder lumps (lumps) were generated after rubbing 60 to 99 times C: Powder lumps (lumps) were generated after rubbing 30 to 59 times D: Powder lumps (lumps) were generated after rubbing less than 30 times

[0142] [Adhesion to skin] A use test was conducted on the samples of each Example and Comparative Example by a panel of 20 experts, who each evaluated the samples on a four-point scale using the absolute criteria below. The average score was calculated from the total scores of all the panelists, and the scores were evaluated from A to D according to the following criteria. Specifically, an appropriate amount of each sample was applied to the skin, and the level of adhesion of the cosmetic upon application was evaluated. (Absolute criteria) 3: Very noticeable 2: noticeable 1: Slightly noticeable 0: Not noticeable (Evaluation criteria) A: 2.5 points or more B: 2 points or more but less than 2.5 points C: 1 point or more but less than 2 points D: Less than 1 point

[0143] [Uniformity of coating film on skin] A test was conducted on the samples of each example and comparative example by a panel of 20 experts, who each evaluated them on a four-point scale using the absolute criteria below. The average score was calculated from the total scores of all the panelists, and the average score was evaluated using the criteria A to D below. Specifically, an appropriate amount of each sample was applied to the skin, and the uniformity of the coating film after application was evaluated. (Absolute criteria) 3: The coating film is uniform with no uneven areas at all 2: The coating film is uniform with slight uneven areas 1: The coating film is uniform with slight uneven areas 0: The coating film is uneven with many uneven areas (Evaluation criteria) A: 2.5 points or more B: 2 points or more but less than 2.5 points C: 1 point or more but less than 2 points D: Less than 1 point

[0144] In view of the above effect measurements and usability evaluations, it can be said that the influence of each of the components (A) to (F) on the caking suppression effect, aggregation suppression effect, adhesion, and coating uniformity generally tends to be as shown in Table 10. However, the extent of the influence varies depending on the compounded components.

[0145]

[0146] Specifically, while there is concern that the incorporation of component (A) UV absorber into UV protection agents may cause caking or aggregate formation upon application to the skin, it has been found that the incorporation of component (B) nonionic surfactant and component (C) dispersibility promoter into this UV protection agent can suppress the caking and aggregate formation. In particular, it has been found that component (B) nonionic surfactant has a stronger aggregation-suppressing effect, while component (C) dispersibility promoter has a stronger caking-suppressing effect. Therefore, it has been found that the incorporation of both component (B) and component (C) complements each other to effectively suppress the caking and aggregate formation. Furthermore, it has been found that component (D) polysaccharide, component (E) UV scattering agent, and component (F) silica also have caking and aggregation-suppressing effects. Therefore, it has been found that the incorporation of one or more of components (D) to (F) in addition to components (A) to (C) can further improve the caking and aggregation-suppressing effects.

[0147] Furthermore, there is concern that UV scattering agents containing silica (F) may reduce adhesion to the skin and coating uniformity. To address this issue, it has been found that by incorporating a nonionic surfactant (B) and a dispersibility promoter (C) into the UV protection agent, adhesion to the skin and coating uniformity can be improved.

[0148] [2. Solid Powder Cosmetic] Formulation examples for solid powder cosmetics containing the aforementioned UV protection agent are shown below. In the formulation examples below, the "remaining amount" in the blending amount (% by mass) means the amount that makes the total amount 100% by weight.

[0149] Formulation Example 1: Powder Foundation (Ingredients) (% by mass) 1. Ethylhexyl methoxycinnamate (ingredient A) 7.0% 2. Polysilicone-15 (ingredient A) 1.0% 3. Diethylamino hydroxybenzoyl hexyl benzoate (ingredient A) 0.5% 4. Bis-ethylhexyloxyphenol methoxyphenyl triazine (ingredient A) 0.5% 5. Ethylhexyl triazone (ingredient A) 0.5% 6. Glyceryl tri-2-ethylhexanoate 0.3% 7. Cetyl 2-ethylhexanoate 0.3% 8. Isotridecyl isononanoate 0.2% 9. Mineral oil 0.1% 10. Dimethicone 1.0% 11. Methyl trimethicone 0.1% 12. Phenyl trimethicone 0.5% 13. Diphenylsiloxyphenyl trimethicone 1.5% 14. Isohexadecane 0.1% 15. Isododecane 0.1% 16. Hydrogenated polyisobutene 0.1% 17. Dextrin isostearate 0.1% 18. Inulin stearate 0.1% 19. Dextrin palmitate 0.1% 20. Fragrance 0.3% 21. Mixture of lavender oil, almond oil, macadamia nut oil, camellia oil, refined jojoba oil, apricot kernel oil, corn oil, grape seed oil, sunflower oil, hazelnut oil, and rosehip oil (mixture of beauty ingredients) 0.1% 22. Polyglyceryl-10 laurate (ingredient B) (ingredient B1) (*1) 1.0%23. Polyglyceryl-10 Oleate (Component B) (Component B1) (*2) 0.5% 24. Olive Oil Glycereth-8 Esters (Component B) (Component B1) (*3) 0.25% 25. Polysorbate 80 (Component B) (Component B1) (*4) 0.5% 26. PEG-20 Methylglucose Sesquistearate (Component B) (Component B1) 0.5% 27. Polysorbate 60 (Component B) (Component B1) (*5) 0.25% 28. Sorbitan Sesquioleate 0.1% 29. Lecithin 0.1% 30. Sorbitan Oleate 0.1% 31. (Acrylates / Beheneth-25 Methacrylate) Copolymer (Component C) (Component C1) (*9) 0.2% 32. 31. Stearoxyhydroxypropylmethylcellulose (ingredient C) (ingredient C1) (* 11) 0.05% 32. (Sodium acrylate / sodium acryloyldimethyltaurate) copolymer) (ingredient C) 0.05% 33. Cellulose gum (ingredient D) (ingredient D1) 0.12% 34. Hydroxypropylmethylcellulose (ingredient D) (ingredient D1) 0.01% 36. Xanthan gum (ingredient D) (ingredient D1) 0.01% 37. Sodium hyaluronate (ingredient D) (ingredient D1) 0.01% 38. Zinc oxide (average particle size 25 nm) (ingredient E) (ingredient E1) (* 18) 4.0% 39. Dimethicone-treated zinc oxide (average particle size 25 nm) (ingredient E) (ingredient E1) (* 19) 0.5% 40. Triethoxycaprylylsilane / dimethicone-treated zinc oxide (average particle size 25 nm) (ingredient E) (ingredient E1) 0.5%41. Titanium dioxide treated with aluminum hydroxide and hydrous silica (average particle size 35 nm) (ingredient E) (ingredient E1) (* 20) 4.0% 42. Stearic acid and titanium dioxide treated with aluminum hydroxide (average particle size 10 nm) (ingredient E) (ingredient E1) (* 21) 0.5% 43. Dimethicone, aluminum hydroxide, and titanium dioxide treated with hydrous silica (average particle size 35 nm) (ingredient E) (ingredient E1) (* 22) 0.5% 44. Sodium dilauroyl glutamate, lysine, magnesium chloride, and titanium dioxide treated with aluminum hydroxide (average particle size 250 nm) (ingredient E) (* 23) 10.0% 45. Titanium dioxide treated with aluminum hydroxide (average particle size 250 nm) (ingredient E) (* 24) 3.5% 46. 47. Zinc oxide treated with hydrogen dimethicone (average particle size 300 nm) (ingredient E) (* 25) 0.5% 47. Zinc oxide (average particle size 300 nm) (ingredient E) (* 26) 5.0% 48. Dimethicone / aluminum hydroxide-treated titanium dioxide (average particle size 250 nm) (ingredient E) (* 30) 0.5% 49. Lecithin 0.5%-treated titanium dioxide (average particle size 250 nm) (ingredient E) 5.0% 50. Isopropyl titanium triisostearate / aluminum hydroxide-treated titanium dioxide (average particle size 250 nm) (ingredient E) (* 31) 0.5% 51. Silica (oil absorption: 290 ml / 100 g) (ingredient F) (ingredient F1) (* 27) 3.0% 52. 51. Silica (oil absorption: 150 ml / 100 g) (component F) (component F1) (* 32) 1.0% 52. Silica (oil absorption: 30 ml / 100 g) (component F) (* 29) 0.5% 53. Silica (oil absorption: 30 ml / 100 g) (component F) (* 29) 0.5% 54. Silica (oil absorption: 60 ml / 100 g) (component F) (* 33) 0.5% 55. Red iron oxide 0.3% 56. Yellow iron oxide 3.0%57. Black iron oxide 0.2% 58. Boron nitride (*34) 2.0% 59. Boron nitride (*35) 2.0% 60. Synthetic phlogopite (*36) 2.0% 61. Dimethicone-treated synthetic phlogopite (*37) 0.5% 62. Dimethiconol-aminopropyltriethoxysilane-treated mica (*38) 2.0% 63. Amodimethicone-treated mica (*39) 2.0% 64. Mica (*40) remaining amount 65. Triethoxycaprylylsilane 2%-treated mica 0.5% 66. Dimethicone-treated talc (*41) 1.0% 67. Dimethiconol-aminopropyltriethoxysilane-treated talc (*42) 2.0% 68. Talc (*43) 1.0% 69. (Fluoride / Hydroxylation / Oxidation) / (Mg / K / Silicon) (*44) 2.0% 70. Nylon-12 (*45) 0.5% 71. Polymethylmethacrylate (*46) 0.5% 72. (HDI / PPG / Polycaprolactone) Crosspolymer / Silica (*47) 0.5% 73. (Vinyl Dimethicone / Methicone Silsesquioxane) Crosspolymer (*48) 3.0% 74. Mixture of Glycine, Theanine, and Serine 0.1% 75. BHT 0.01% 76. Chlorphenesin 0.2% 77. Tripropylene Glycol 2.0% 78. Dipropylene glycol 1.0% 79.1,3-butylene glycol 1.0%80. PEG-6 0.1% 81. PEG-6 0.1% 82. PEG-8 0.1% 83. PEG-32 0.1% 84. PEG-400 0.1% 85. Diglycerin 0.1% 86. Glycerin 0.1% 87. Phenoxyethanol 0.3% 88. Phenylbenzimidazole sulfonic acid (ingredient A) 0.5% 89. Triethanolamine 1.0% 90. Mixture of Hitorishige extract, asparagus extract, artemia extract, guava extract, coffee extract, taiso extract, grape leaf extract, burnet extract, peppermint leaf extract, cherry blossom flower extract, elderberry flower extract, tea leaf extract, tangerine extract, jasmine flower extract, multiflora rose fruit extract, rosehip flower extract, rosa izayoi extract, royal jelly extract, angelica root extract, rosa centifolia flower extract, damask rose flower water, rosemary leaf extract, acerola fruit extract, iris root extract, sage leaf extract, and rosemary leaf extract (mixture of beauty ingredients) 0.5%91. Gentian Extract, Hydrolyzed Silk Liquid, Hydrolyzed Rice Extract, Seaweed Extract, Iris Iris Leaf Extract, Artemisia Capillaris Flower Extract, Alpinia Speciosa Leaf Extract, Saccharomyces Cerevisiae Extract, Pomegranate Fruit Extract, Pomegranate Peel Extract, Galium Thunbergii Fruit Extract, Eggplant Fruit Extract, Harpagophytum Root Extract, Parsley Extract, Royal Jelly Extract, Rosa Alba Flower Extract, Avocado Extract, Gynostemma Pentaphyllum Extract, Chamomilla Recutita (Matricaria) Water, Barberry Fruit Extract, Apple 91. Mixture of beauty ingredients: 0.5% 92. Extract, lemongrass extract, Hitoshi Shizu extract, asparagus extract, artemia extract, guava extract, coffee extract, taiso extract, grape leaf extract, burnet extract, artemisia capillaris extract, rosa robur extract, hanamasu extract, elderberry flower extract, tea leaf extract, angelica root extract, jasmine flower extract, angelica acutiloba root extract, rosa centifolia flower extract, damask rose flower water, rosemary leaf extract (mixture of beauty ingredients) 0.5% 93. Purified water (non-prescription) 75.0% 94. Ethanol (non-prescription) 0.5% (Footnote) (*30) SA-Titanium CR-50 (Miyoshi Chemicals Co., Ltd.) (*31) ITT-2 TiO2 CR-50 (Daito Chemicals Co., Ltd.) (*32) God Ball E-2C (Suzuki Oil & Fat Industries Co., Ltd.) (*33) Silica Microbead P-1505 (JGC Catalysts & Chemicals Co., Ltd.) (*34) SHP-3 (Mizushima Ferroalloy Co., Ltd.) (*35) CCS102-JA Boron Nitride Powder (Momentive Performance Materials Japan LLC) (*36) PDM-10L (Topy Industries Ltd.) (*37) SA-PDM-10L (Miyoshi Chemicals Co., Ltd.) (*38) SE-MA-23 (manufactured by Miyoshi Chemicals Co., Ltd.) (*39) Mica Y-2300WA3 (manufactured by Yamaguchi Mica Co., Ltd.) (*40) Mica Y-3000 (manufactured by Yamaguchi Mica Co., Ltd.) (*41) SA-Talc JA-46R (manufactured by Miyoshi Chemicals Co., Ltd.) (*42) SE-TA-13 (manufactured by Miyoshi Chemicals Co., Ltd.) (*43) Talc EX-15 (manufactured by Yamaguchi Mica Co., Ltd.) (*44) Micromica MK-200 (manufactured by Katakura Coop Agri Co., Ltd.) (*45) Toray Nylon SP-500 (manufactured by Toray Industries, Inc.)(*46) Matsumoto Microsphere M101 (manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.) (*47) CS-400 (manufactured by Toshiki Pigment Co., Ltd.) (*48) KSP-100 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0150] (Production Method) A. A portion of component 92 was stirred with component 77, component 32, and components 34-37, and the mixture was heated to 80°C to obtain a mixture. B. The remainder of component 92 was stirred with components 88-89, and then components 31 and 33 were added and stirred, and the mixture was heated to 80°C to obtain a mixture. C. The mixture obtained in A and B was stirred with components 22-30, and components 78-87 were added and stirred, and the mixture was heated to 80°C to obtain a mixture. D. Components 1-21 and component 75 were stirred and heated to 80°C to obtain a mixture. E. The mixture obtained in D was added to the mixture obtained in C and emulsified to obtain an emulsion. F. The emulsion obtained in E was cooled to 40°C to obtain an emulsion. G. Components 38-74 and component 76 were mixed and pulverized to obtain a pulverized powder. H. Components 90, 91, and 93 were added to the emulsion obtained in F and stirred, and then the pulverized powder obtained in G was added and stirred to obtain a mixture. I. The mixture obtained in H was poured into a mold combining a silicone mold and a metal dish and flash-frozen at -40°C. J. The silicone mold was removed from the flash-frozen sample obtained in I, and the sample was dried in a vacuum dryer while maintaining the frozen state to obtain a solid powder cosmetic.

[0151] (Evaluation) It was confirmed that the foundation of Formulation Example 1 had excellent caking suppression effect, aggregation suppression effect, adhesion, and coating uniformity. In addition, the density was 0.98 g / cm ３The total amount of component (A) was 10.0%. The total amount of component (B) was 3.0%, and the total amount of component (B1) was 3.0%. The total amount of component (C) was 0.30%, and the total amount of component (C1) was 0.25%. The total amount of component (D) was 0.15%, and the total amount of component (D1) was 0.15%. The total amount of component (E) was 35.0%, and the total amount of component (E1) was 10.0%. The total amount of component (F) was 5.0%, and the total amount of component (F1) was 3.0%. Therefore, the weight ratio relationships were as follows: (A) / (B) was 3.33. (A) / (C) was 33.33. (A) / (E) was 0.29. (A) / (E1) was 1.00.

[0152] Formulation Example 2: Powder Foundation (Ingredients) (% by mass) 1. Ethylhexyl methoxycinnamate (ingredient A) 1.0% 2. Bis-ethylhexyloxyphenol methoxyphenyl triazine (ingredient A) 1.0% 3. Glyceryl tri-2-ethylhexanoate 2.0% 4. Cetyl 2-ethylhexanoate 2.0% 5. Isotridecyl isononanoate 1.2% 6. Diphenylsiloxyphenyl trimethicone 2.0% 7. Petrolatum 0.1% 8. Dipentaerythrityl hexa(hydroxystearate / stearic acid / rosinate) 0.1% 9. Beeswax 0.1% 10. Polyethylene 0.1% 11. Paraffin 0.09% 12. Microcrystalline wax 0.03% 13. Fragrance 0.2% 14. Mixture of lavender oil, almond oil, macadamia nut oil, camellia oil, refined jojoba oil, apricot kernel oil, corn oil, grape seed oil, sunflower oil, hazelnut oil, and rosehip oil (mixture of beauty ingredients) 0.1% 15. Polyglyceryl-10 laurate (ingredient B) (ingredient B1) (* 1) 1.5% 16. Olive oil glycereth-8 esters (ingredient B) (ingredient B1) (* 3) 0.5% 17. Polyoxyethylene (80) hydrogenated castor oil (ingredient B) (* 6) 0.2% 18. Polyoxyethylene (60) hydrogenated castor oil (ingredient B) (* 7) 0.2% 19. Polyoxyethylene (20) hydrogenated castor oil (ingredient B) (* 8)0.1% 20. Sorbitan Isostearate 0.1% 21. (Acrylates / Beheneth-25 Methacrylate) Copolymer (Component C) (Component C1) (* 9) 0.25% 22. (Acrylates / Steareth-20 Methacrylate) Copolymer (Component C) (Component C1) (* 10) 0.05% 23. Acrylates Copolymer (Component C) 0.01% 24. Carbomer (Component C) 0.01% 25. Cellulose Gum (Component D) (Component D1) 0.05% 26. Hydroxypropyl Methylcellulose (Component D) (Component D1) 0.05% 27. Zinc Oxide (Average Particle Size 25 nm) (Component E) (Component E1) (* 18) 2.5% 28. 29. Titanium dioxide treated with aluminum hydroxide and hydrated silica (average particle size 35 nm) (ingredient E) (ingredient E1) (* 20) 2.0% 29. Titanium dioxide treated with hydrogen dimethicone (average particle size 80 nm) (ingredient E) (ingredient E1) (* 49) 0.5% 30. Titanium dioxide treated with sodium dilauroyl glutamate, lysine, magnesium chloride, and aluminum hydroxide (average particle size 250 nm) (ingredient E) (* 23) 5.0% 31. Titanium dioxide treated with 0.5% lecithin (average particle size 250 nm) (ingredient E) 5.0% 32. Silica (oil absorption: 290 ml / 100 g) (ingredient F) (ingredient F1) (* 27) 0.5% 33. 33. Silica (oil absorption: 150 ml / 100 g) (component F) (component F1) (* 28) 0.5% 34. Silica (oil absorption: 150 ml / 100 g) (component F) (component F1) (* 32) 3.0% 35. Red iron oxide 0.15% 36. Yellow iron oxide 1.5%37. Black Iron Oxide 0.1% 38. Dimethiconol / Aminopropyltriethoxysilane Treated Mica (*38) 15.0% 39. Dimethicone Treated Mica 5.0% 40. Mica (*40) Remaining Amount 41. (Fluoride / Hydroxylate / Oxide) / (Mg / K / Silicon) (*44) 5.0% 42. (Vinyl Dimethicone / Methicone Silsesquioxane) Crosspolymer (*48) 5.0% 43. Mixture of Glycine, Theanine, and Serine 0.1% 44. BHT 0.01% 45. Chlorphenesin 0.15% 46. Tripropylene Glycol 1.0% 47. 1,3-Butylene Glycol 2.0% 48. Phenoxyethanol 0.2% 49. Triethanolamine 0.35% 50. Mixture of Hitotsujizu extract, asparagus extract, artemia extract, guava extract, coffee extract, taiso extract, grape leaf extract, burnet extract, peppermint leaf extract, cherry blossom flower extract, elderberry flower extract, tea leaf extract, tangerine extract, jasmine flower extract, multiflora rose fruit extract, rugosa rose flower extract, rosa izayoi extract, royal jelly extract, angelica root extract, rosa centifolia flower extract, damask rose flower water, rosemary leaf extract, acerola fruit extract, iris root extract, sage leaf extract, and rosemary leaf extract (mixture of beauty ingredients) 0.2% 51. Purified water (non-prescription) 75.0% (Footnote) (*49) MTY-700BS (Teika Corporation)

[0153] (Production Method) A. A portion of component 51 was stirred with component 47 and components 24 to 26, and the mixture was heated to 80°C to obtain a mixture. B. The remainder of component 51 was stirred with component 49, and components 21 to 23 were added and stirred, and the mixture was heated to 80°C to obtain a mixture. C. The mixture obtained in A and B was stirred with components 15 to 20, and components 46 and 48 were added and stirred, and the mixture was heated to 80°C to obtain a mixture. D. Components 1 to 14 and component 44 were stirred and heated to 80°C to obtain a mixture. E. The mixture obtained in D was added to the mixture obtained in C and emulsified to obtain an emulsion. F. The emulsion obtained in E was cooled to 40°C to obtain an emulsion. G. Components 27 to 43 and component 45 were mixed and pulverized to obtain a pulverized powder. H. Component 50 was added to the emulsion obtained in F and stirred, and then the pulverized powder obtained in G was added and stirred to obtain a mixture. I. The mixture obtained in H was poured into a mold combining a silicone mold and a metal dish and flash-frozen at -40°C. J. The silicone mold was removed from the flash-frozen sample obtained in I, and the sample was dried in a vacuum dryer while maintaining its frozen state to obtain a solid powder cosmetic.

[0154] (Evaluation) It was confirmed that the foundation of Formulation Example 2 had excellent caking suppression effect, aggregation suppression effect, adhesion, and coating uniformity. In addition, the density was 0.93 g / cm ３ The total amount of component (A) was 2.0%. The total amount of component (B) was 2.5%, and the total amount of component (B1) was 2.0%. The total amount of component (C) was 0.32%, and the total amount of component (C1) was 0.30%. The total amount of component (D) was 0.10%, and the total amount of component (D1) was 0.10%. The total amount of component (E) was 15.0%, and the total amount of component (E1) was 5.0%. The total amount of component (F) was 4.0%, and the total amount of component (F1) was 4.0%. Therefore, the weight ratio relationships were as follows: (A) / (B) was 0.80. (A) / (C) was 6.25. (A) / (E) was 0.13. (A) / (E1) was 0.40.

[0155] Formulation Example 3: Skin Color Control Powder (Ingredients) (% by mass) 1. Ethylhexyl methoxycinnamate (ingredient A) 5.0% 2. Glyceryl tri-2-ethylhexanoate 0.35% 3. Fragrance 0.15% 4. Mixture of lavender oil, almond oil, macadamia nut oil, camellia oil, refined jojoba oil, apricot kernel oil, corn oil, grape seed oil, sunflower oil, hazelnut oil, and rosehip oil (mixture of beauty ingredients) 0.1% 5. Polyglyceryl-10 laurate (ingredient B) (ingredient B1) (*1) 0.5% 6. Sorbitan sesquioleate 0.1% 7. Lecithin 0.1% 8. Sorbitan oleate 0.1% 9. Sorbitan isostearate 0.1% 10. 11. Cellulose Gum (Component D) (Component D1) 0.3% 12. Zinc Oxide (Average Particle Size: 25 nm) (Component E) (Component E1) (* 18) 1.0% 13. Silica (Oil Absorption: 290 ml / 100 g) (Component F) (Component F1) (* 27) 1.5% 14. Red Iron Oxide 0.11% 15. Red 202 0.02% 16. Red 226 0.02% 17. Boron Nitride (* 34) 5.0% 18. Synthetic Phlogopite (* 36) 10.0% 19. Dimethicone-Treated Synthetic Phlogopite (* 37) 5.0% 20. Dimethiconol / aminopropyltriethoxysilane treated mica (*38) 10.0%21. Mica (*40) remaining 22. Dimethiconol / aminopropyltriethoxysilane-treated talc (*42) 5.0% 23. (Fluoride / hydroxylation / oxide) / (Mg / K / silicon) (*44) 10.0% 24. Nylon-12 (*45) 5.0% 25. Polymethyl methacrylate (*46) 5.0% 26. BHT 0.01% 27. Chlorphenesin 0.1% 28. Dipropylene glycol 2.0% 29. Phenoxyethanol 0.15% 30. Triethanolamine 0.3% 31. Gentian extract, hydrolyzed silk liquid, hydrolyzed rice extract, seaweed extract, Iris officinalis leaf extract, Artemisia capillaris flower extract, Alpinia speciosa leaf extract, Saccharomyces cerevisiae extract, Pomegranate fruit extract, Pomegranate peel extract, Galium ginseng fruit extract, Eggplant fruit extract, Harpagophytum root extract, Parsley extract, Royal jelly extract, Rosa alba flower extract, Avocado extract, Gynostemma pentaphyllum extract, Chamomilla recutita (matricaria) water, Barberry fruit extract, Apple Extract, lemongrass extract, Hitoshi Shizu extract, asparagus extract, artemia extract, guava extract, coffee extract, taiso extract, grape leaf extract, burnet extract, artemisia capillaris extract, rosa robur extract, hanamasu extract, elderberry flower extract, tea leaf extract, angelica root extract, jasmine flower extract, angelica acutiloba root extract, rosa centifolia flower extract, damask rose flower water, rosemary leaf extract (mixture of beauty ingredients 0.2%) 32. Purified water (non-prescription) 75.0%

[0156] (Production Method) A. A portion of component 32 was stirred with component 28 and component 11, and the mixture was heated to 80°C to obtain a mixture. B. The remainder of component 32 was stirred with component 30, and component 10 was added and stirred, and the mixture was heated to 80°C to obtain a mixture. C. The mixture obtained in A and B was stirred with components 5 to 9, and component 29 was added and stirred, and the mixture was heated to 80°C to obtain a mixture. D. Components 1 to 4 and component 26 were stirred and heated to 80°C to obtain a mixture. E. The mixture obtained in D was added to the mixture obtained in C and emulsified to obtain an emulsion. F. The emulsion obtained in E was cooled to 40°C to obtain an emulsion. G. Components 12 to 25 and component 27 were mixed and pulverized to obtain a pulverized powder product. H. Component 31 was added to the emulsion obtained in F and stirred, and then the pulverized powder product obtained in G was added and stirred to obtain a mixture. I. The mixture obtained in H was poured into a silicone mold and quickly frozen at −40° C. J. The quickly frozen sample obtained in I was removed from the silicone mold and dried in a vacuum dryer while maintaining the frozen state, thereby obtaining a solid powder cosmetic.

[0157] (Evaluation) It was confirmed that the skin color control powder of Formulation Example 3 had excellent caking suppression effect, aggregation suppression effect, adhesion, and coating uniformity. In addition, the density was 0.85 g / cm ３ The total amount of component (A) was 5.0%. The total amount of component (B) was 0.5%, and the total amount of component (B1) was 0.5%. The total amount of component (C) was 0.30%, and the total amount of component (C1) was 0.30%. The total amount of component (D) was 0.30%, and the total amount of component (D1) was 0.30%. The total amount of component (E) was 1.0%, and the total amount of component (E1) was 1.0%. The total amount of component (F) was 1.5%, and the total amount of component (F1) was 1.5%. Therefore, the weight ratio relationships were as follows: (A) / (B) was 10.0. (A) / (C) was 16.67. (A) / (E) was 5.0. (A) / (E1) was 5.0.

[0158] Formulation Example 4: Sunscreen Powder (Ingredients) (% by mass) 1. Ethylhexyl methoxycinnamate (ingredient A) 7.0% 2. Polysilicone-15 (ingredient A) 2.0% 3. Diethylamino hydroxybenzoyl hexyl benzoate (ingredient A) 1.5% 4. Bis-ethylhexyloxyphenol methoxyphenyl triazine (ingredient A) 2.5% 5. Ethylhexyl triazone (ingredient A) 1.0% 6. Isotridecyl isononanoate 2.0% 7. Alkyl benzoate (C12-15) 3.0% 8. Propylene glycol di(caprylate / caprate) 3.0% 9. Propylene glycol dicaprate 2.0% 10. Diphenylsiloxyphenyl trimethicone 0.5% 11. Dextrin isostearate 0.1% 12. Fragrance 0.3% 13. Mixture of lavender oil, almond oil, macadamia nut oil, camellia oil, refined jojoba oil, apricot kernel oil, corn oil, grape seed oil, sunflower oil, hazelnut oil, and rosehip oil (mixture of beauty ingredients) 0.1% 14. Polyglyceryl-10 laurate (ingredient B) (ingredient B1) (* 1) 2.0% 15. Polyglyceryl-10 oleate (ingredient B) (ingredient B1) (* 2) 0.5% 16. PEG-20 methyl glucose sesquistearate (ingredient B) (ingredient B1) 0.5% 17. (Acrylates / beheneth-25 methacrylate) copolymer (ingredient C) (ingredient C1) (* 9) 0.10% 18. Stearoxyhydroxypropyl methylcellulose (ingredient C) (ingredient C1) (* 11) 0.05%19. Cellulose gum (ingredient D) (ingredient D1) 0.05% 20. Hydroxypropyl methylcellulose (ingredient D) (ingredient D1) 0.05% 21. Sodium hyaluronate (ingredient D) (ingredient D1) 0.01% 22. Zinc oxide (average particle size 25 nm) (ingredient E) (ingredient E1) (* 18) 25.0% 21. Aluminum hydroxide / hydrated silica-treated titanium dioxide (average particle size 35 nm) (ingredient E) (ingredient E1) (* 20) 10.0% 22. Silica (oil absorption: 290 ml / 100 g) (ingredient F) (ingredient F1) (* 27) 1.0% 23. Silica (oil absorption: 150 ml / 100 g) (ingredient F) (ingredient F1) (* 32) 1.0% 24. Mica (*40) remaining 25. (Vinyl dimethicone / methicone silsesquioxane) crosspolymer (*48) 5.0% 26. Mixture of glycine, theanine, and serine 0.1% 27. BHT 0.01% 28. Chlorphenesin 0.2% 29. Tripropylene glycol 0.5% 30. Dipropylene glycol 0.5% 31. 1,3-butylene glycol 0.5% 32. Glycerin 0.5% 33. Phenoxyethanol 0.2% 34. Phenylbenzimidazole sulfonic acid 0.5% 35. Triethanolamine 0.6%36. Mixture of Hitorishige Extract, Asparagus Extract, Artemia Extract, Guava Extract, Coffee Extract, Tahistoia Extract, Grape Leaf Extract, Burnt Extract, Peppermint Leaf Extract, Prunus Sinensis Flower Extract, Sambucus Nigra Flower Extract, Tea Leaf Extract, Angelica Extract, Jasminum Sambac Flower Extract, Rosa Multiflora Fruit Extract, Rugosa Rose Flower Extract, Rosa Izayoi Extract, Royal Jelly Extract, Angelica Root Extract, Rosa Centifolia Flower Extract, Rosa Damascena Flower Water, Rosemary Leaf Extract, Acerola Fruit Extract, Iris Root Extract, Sage Leaf Extract, and Rosemary Leaf Extract (Mixture of Cosmetic Ingredients) 0.5% Gentian extract, hydrolyzed silk liquid, hydrolyzed rice extract, seaweed extract, Iris officinalis leaf extract, Artemisia capillaris flower extract, Alpinia speciosa leaf extract, Saccharomyces cerevisiae extract, Pomegranate fruit extract, Pomegranate peel extract, Galium ginseng fruit extract, Eggplant fruit extract, Harpagophytum root extract, Parsley extract, Royal jelly extract, Rosa alba flower extract, Avocado extract, Gynostemma pentaphyllum extract, Chamomilla recutita (matricaria) water, Barberry fruit extract, Apple Extract, lemongrass extract, Hitoshi Shizu extract, asparagus extract, artemia extract, guava extract, coffee extract, taiso extract, grape leaf extract, burnet extract, artemisia capillaris extract, Rosa rosa extract, flower extract, elderberry extract, tea leaf extract, angelica root extract, jasmine flower extract, angelica acutiloba root extract, rosa centifolia flower extract, damask rose flower water, rosemary leaf extract (mixture of beauty ingredients) 0.5% 38. Purified water (non-prescription) 75.0%

[0159] (Production Method) A. A portion of component 38 was stirred with component 29 and components 18 to 21, and the mixture was heated to 80°C to obtain a mixture. B. The remainder of component 38 was stirred with component 35, and then components 17 and 34 were added and stirred, and the mixture was heated to 80°C to obtain a mixture. C. The mixture obtained in A and B was stirred with components 14 to 16, and components 30 to 33 were added and stirred, and the mixture was heated to 80°C to obtain a mixture. D. Components 1 to 13 and component 27 were stirred and heated to 80°C to obtain a mixture. E. The mixture obtained in D was added to the mixture obtained in C and emulsified to obtain an emulsion. F. The emulsion obtained in E was cooled to 40°C to obtain an emulsion. G. Components 22 to 26 and component 28 were mixed and pulverized to obtain a pulverized powder. H. Components 36 and 37 were added to the emulsion obtained in F and stirred, and then the pulverized powder obtained in G was added and stirred to obtain a mixture. I. The mixture obtained in H was poured into a silicone mold and flash-frozen at -40°C. J. The flash-frozen sample obtained in I was removed from the silicone mold and dried in a vacuum dryer while maintaining its frozen state to obtain a solid powder cosmetic.

[0160] (Evaluation) It was confirmed that the sunscreen powder of Formulation Example 4 had excellent caking suppression effect, aggregation suppression effect, adhesion, and coating uniformity. In addition, the density was 1.04 g / cm ３ The total amount of component (A) was 14.5%. The total amount of component (B) was 3.0%, and the total amount of component (B1) was 3.0%. The total amount of component (C) was 0.15%, and the total amount of component (C1) was 0.15%. The total amount of component (D) was 0.11%, and the total amount of component (D1) was 0.11%. The total amount of component (E) was 35.0%, and the total amount of component (E1) was 35.0%. The total amount of component (F) was 2.0%, and the total amount of component (F1) was 2.0%. Therefore, the weight ratio relationships were as follows: (A) / (B) was 4.83. (A) / (C) was 96.67. (A) / (E) was 0.41. (A) / (E1) was 0.41.

[0161] Formulation Example 5: Body Sunscreen Powder (Ingredients) (% by mass) 1. Ethylhexyl methoxycinnamate (ingredient A) 7.0% 2. Polysilicone-15 (ingredient A) 3.0% 3. Diethylamino hydroxybenzoyl hexyl benzoate (ingredient A) 1.0% 4. Bis-ethylhexyloxyphenol methoxyphenyl triazine (ingredient A) 1.0% 5. Ethylhexyl triazone (ingredient A) 1.0% 6. Cetyl 2-ethylhexanoate 2.0% 7. Isotridecyl isononanoate 0.7% 8. Alkyl benzoate (C12-15) 2.0% 9. Isohexadecane 0.1% 10. Fragrance 0.2% 11. Polyglyceryl-10 laurate (ingredient B) (ingredient B1) (*1) 0.2% 12. 13. Polysorbate 80 (ingredient B) (ingredient B1) (* 4) 0.05% 13. (Acrylates / Beheneth-25 Methacrylate) Copolymer (ingredient C) (ingredient C1) (* 9) 0.15% 14. (Sodium Acrylate / Sodium Acryloyldimethyl Taurate) Copolymer (ingredient C) (* 12) 0.1% 15. Cellulose Gum (ingredient D) (ingredient D1) 0.15% 16. Glycosyl Trehalose, Hydrogenated Starch Hydrolysate, Water Mixture (ingredient D) 0.01% 17. Zinc Oxide (average particle size 25 nm) (ingredient E) (ingredient E1) (* 18) 5.0% 18. Dimethicone-treated Zinc Oxide (average particle size 25 nm) (ingredient E) (ingredient E1) (* 19) 0.5%19. Triethoxycaprylylsilane / Dimethicone-treated Zinc Oxide (Average Particle Size: 25 nm) (Ingredient E) (Ingredient E1) 0.5% 20. Aluminum Hydroxide / Hydrated Silica-treated Titanium Oxide (Average Particle Size: 35 nm) (Ingredient E) (Ingredient E1) (* 20) 0.5% 21. Stearic Acid / Aluminum Hydroxide-treated Titanium Oxide (Average Particle Size: 10 nm) (Ingredient E) (Ingredient E1) (* 21) 0.5% 22. Dimethicone / Aluminum Hydroxide / Hydrated Silica-treated Titanium Oxide (Average Particle Size: 35 nm) (Ingredient E) (Ingredient E1) (* 22) 0.5% 23. Zinc Oxide (Average Particle Size: 300 nm) (Ingredient E) (* 26) 5.0% 24. 25. Silica (oil absorption: 290 ml / 100 g) (component F) (component F1) (* 27) 4.0% 25. Silica (oil absorption: 150 ml / 100 g) (component F) (component F1) (* 32) 2.0% 26. Silica (oil absorption: 30 ml / 100 g) (component F) (* 29) 1.0% 27. Silica (oil absorption: 60 ml / 100 g) (component F) (* 33) 2.0% 28. Mica (* 40) balance 29. Talc (* 43) 10.0% 30. (Fluoride / Hydroxylate / Oxide) / (Mg / K / Silicon) (* 44) 20.0% 31. BHT 0.01% 32. Chlorphenesin 0.2% 33. 33. Tripropylene glycol 1.0% 34. Phenoxyethanol 0.3% 35. Triethanolamine 0.15%36. Mixture of Hitorishige extract, asparagus extract, artemia extract, guava extract, coffee extract, taiso extract, grape leaf extract, burnet extract, peppermint leaf extract, cherry blossom flower extract, elderberry flower extract, tea leaf extract, tangerine extract, jasmine flower extract, multiflora rose fruit extract, rosehip flower extract, rosa izayoi extract, royal jelly extract, angelica root extract, rosa centifolia flower extract, damask rose flower water, rosemary leaf extract, acerola fruit extract, iris root extract, sage leaf extract, and rosemary leaf extract (mixture of beauty ingredients) 0.2% 37. Purified water (non-prescription) 75.0%

[0162] (Production Method) A. A portion of component 37 was stirred with component 33 and component 15, and the mixture was heated to 80°C to obtain a mixture. B. The remainder of component 37 was stirred with component 35, and then components 13-14 and 16 were added and stirred, and the mixture was heated to 80°C to obtain a mixture. C. The mixture obtained in A and B was stirred with components 11-12, component 34 was added and stirred, and the mixture was heated to 80°C to obtain a mixture. D. Components 1-10 and component 31 were stirred and heated to 80°C to obtain a mixture. E. The mixture obtained in D was added to the mixture obtained in C and emulsified to obtain an emulsion. F. The emulsion obtained in E was cooled to 40°C to obtain an emulsion. G. Components 17-30 and component 32 were mixed and pulverized to obtain a pulverized powder product. H. Component 36 was added to the emulsion obtained in F and stirred, and then the pulverized powder product obtained in G was added and stirred to obtain a mixture. I. The mixture obtained in H was poured into a mold combining a silicone mold and a metal dish, and then flash-frozen at −40° C. J. The silicone mold was removed from the flash-frozen sample obtained in I, and the sample was dried in a vacuum dryer while maintaining the frozen state, thereby obtaining a solid powder cosmetic preparation.

[0163] (Evaluation) It was confirmed that the sunscreen powder for body of Example 4 had excellent caking suppression effect, aggregation suppression effect, adhesion, and coating uniformity. In addition, the density was 0.95 g / cm ３The total amount of component (A) was 13.0%. The total amount of component (B) was 0.25%, and the total amount of component (B1) was 0.25%. The total amount of component (C) was 0.25%, and the total amount of component (C1) was 0.15%. The total amount of component (D) was 0.16%, and the total amount of component (D1) was 0.15%. The total amount of component (E) was 12.5%, and the total amount of component (E1) was 7.5%. The total amount of component (F) was 9.0%, and the total amount of component (F1) was 6.0%. Therefore, the weight ratio relationships were as follows: (A) / (B) was 52.0. (A) / (C) was 52.0. (A) / (E) was 1.04. (A) / (E1) was 1.73.

[0164] [2. UV Protection Agent (UV Scattering Agent)] Tables 11 to 15 show the blending ratios of each component blended in Examples and Comparative Examples of the UV protection agent according to the present invention. The blending ratios are in mass %.

[0165]

[0166]

[0167]

[0168]

[0169]

[0170]

[0171]

[0172]

[0173]

[0174]

[0175] In the above table, the numbers in parentheses, such as "(10 nm)", are the average particle size of the scattering material. In the above table, the * marks are footnote numbers that indicate the brand or product name of each component, and the details are as follows: (Footnotes) *51 MTY-110M3S (manufactured by Teika Corporation) *52 MT-01 (manufactured by Teika Corporation) *53 MTY-500SAM (manufactured by Teika Corporation) *54 MTY-700BS (manufactured by Teika Corporation) *55 MZY-505M (manufactured by Teika Corporation) *56 ASL-1 TiO ２ MP-1133 (manufactured by Daito Chemical Industry Co., Ltd.) *57 SA-Titanium CR-50 (manufactured by Miyoshi Chemical Industry Co., Ltd.) *58 ITT-2 TiO2 CR-50 (manufactured by Daito Chemical Industry Co., Ltd.) *59 XZ-300F-LP (manufactured by Sakai Chemical Industry Co., Ltd.) *60 MT-500SA (manufactured by Teika Co., Ltd.) *61 MZ-500 (manufactured by Teika Co., Ltd.) *62 CR-50 (manufactured by Ishihara Sangyo Kaisha, Ltd.) *63 XZ-300F (manufactured by Sakai Chemical Industry Co., Ltd.) *64 Metrose 65SH4000 (manufactured by Shin-Etsu Chemical Co., Ltd.) *65 TORNARE (manufactured by Hayashibara Co., Ltd.) *66 NIKKOL Decaglyn 1-L (manufactured by Nikko Chemicals Co., Ltd.) *67 NIKKOL Decaglyn 1-OV (manufactured by Nikko Chemicals Co., Ltd.) *68 RESPLANTA OLIVE MB (manufactured by SHARON PERSONAL CARE S.R.L.) *69 NONION OT-221R (manufactured by NOF Corporation) *70 NIKKOL TS-10V (manufactured by Nikko Chemicals Co., Ltd.) *71 NIKKOL HCO-80 (manufactured by Nikko Chemicals Co., Ltd.) *72 NIKKOL HCO-60 (manufactured by Nikko Chemicals Co., Ltd.) *73 NIKKOL HCO-20 (manufactured by Nikko Chemicals Co., Ltd.)

[0176] As shown in Tables 11 to 20 above, Examples 48 to 84 all contained component (a) a hydrophobic scattering agent, component (D) a polysaccharide, component (B) a nonionic surfactant, component (G) a polyhydric alcohol, and component (H) an oil. Furthermore, as shown in Table 18, Example 85 did not contain component (G) a polyhydric alcohol, but contained the other components (a), (B), (D), and (H). Furthermore, Example 86 did not contain component (H) an oil, but contained the other components (a), (B), (D), and (G). Furthermore, each Example contained mica in addition to the above components.

[0177] Each example was produced using the following steps: (1) Component (a) and mica were mixed to obtain a mixture. (2) Component H was added to the mixture (1) and mixed to obtain a mixture. (3) The mixture (2) was pulverized to obtain a powdered first mixture. (4) Component D, a portion of Component G, and a portion of purified water were mixed to obtain a swollen product. (5) The remaining portion of Component G, Component B, and the remaining portion of purified water were added to the swollen product (4) and mixed to obtain a second mixture. (6) The powdered first mixture (3) was added to the second mixture (5) and mixed to obtain a bulk. (7) The bulk (6) was poured into a silicone mold and flash-frozen in a flash freezer to obtain a frozen sample. The temperature inside the flash freezer was set to -40°C, and the cooling time was 60 minutes. (8) The frozen sample (7) was freeze-dried in a vacuum dryer while maintaining the frozen state, to obtain the final UV protection agent. The temperature inside the vacuum dryer was set to -40°C and the pressure was set to 50Pa.

[0178] In Example 85, the component (G) was not contained, and therefore the addition of the component (G) was omitted in the above steps (4) and (5). In Example 86, the component (H) was not contained, and therefore the above step (2) was omitted. In Examples 85 and 86, the UV protection agents were produced according to the above steps.

[0179] As shown in Table 19 above, Comparative Example 8 did not contain component (a) the hydrophobic scattering agent, but contained the other components (B), (D), (G), and (H). Comparative Examples 9 to 12 did not contain component (a) the hydrophobic scattering agent, but instead contained a hydrophilic scattering agent, and also contained the other components (B), (D), (G), and (H). As shown in Table 20 above, Comparative Example 13 did not contain component (D) the polysaccharide, but contained the other components (a), (B), (G), and (H). Comparative Examples 14 to 17 did not contain component (B) the nonionic surfactant with an HLB value of 10 or more, but contained the other components (a), (D), (G), and (H). Each Comparative Example, like each Example, contained mica in addition to the above components.

[0180] Each comparative example was basically produced using the same steps as the above-mentioned examples. However, since comparative example 8 did not contain component (a), step (1) was omitted, and mica and component (H) were mixed in step (2) to obtain a mixture. Furthermore, comparative examples 9 to 12 contained a hydrophilic scattering agent instead of component (a), so the hydrophilic scattering agent and mica were mixed in step (1). Furthermore, comparative example 13 did not contain component (D), so the addition of component (D) was omitted in step (4). Furthermore, comparative examples 14 to 17 did not contain component (B), so component (B) was omitted in step (5). In all other comparative examples, ultraviolet protection agents were produced according to the above-mentioned steps.

[0181] As shown in Tables 11 to 20, the UV protection improvement effect, the appropriate amount of bleed, the adhesion to the skin, and the smooth feel when used were measured or evaluated for each Example and Comparative Example. The methods for measuring or evaluating each effect or performance are as follows.

[0182] [UV Protection Improvement Effect] For each Example and Comparative Example, a sample of the UV protection agent was prepared by freeze-drying (steps (7) and (8) above) and a sample of the UV protection agent was prepared by conventional drying. Furthermore, 0.35 g of each sample was applied with a finger to a 5 cm x 5 cm PMMA plate, and the SPF value was measured using a UV-2000S SPF Analyzer (manufactured by Labshere, USA). The obtained measured value was applied to the following equation to confirm the UV protection improvement effect of freeze-drying. (Equation) (Measured value of freeze-dried sample / Measured value of conventionally dried sample). In the conventional drying, the bulk obtained in step (6) above was filled into a metal dish and press-molded (water that seeped out during pressing was removed by press suction, if necessary), and then dried for 12 hours in a constant temperature bath at 40°C. The value calculated by the above equation was evaluated according to the following criteria, A to D. (Evaluation Criteria) A: 1.25 or more B: 1.15 times or more and less than 1.25 times C: 1.05 times or more and less than 1.15 times D: Less than 1.05 times

[0183] [Appropriate amount of training] A use test was conducted on the samples of each Example and Comparative Example by a panel of 20 experts, and each panelist evaluated them on a four-point scale using the absolute criteria below. The average score was calculated from the total score of all the panelists, and the average score was evaluated from A to D according to the criteria below. Specifically, the amount of training of powder on the mat when each sample was rubbed against the mat was evaluated. (Absolute criteria) 3: The amount of training is appropriate 2: The amount of training is slightly insufficient or slightly excessive 1: The amount of training is slightly insufficient or slightly excessive 0: The amount of training is insufficient or excessive (Evaluation criteria) A: 2.5 points or more B: 2 points or more but less than 2.5 points C: 1 point or more but less than 2 points D: Less than 1 point

[0184] [Adhesion to Skin] Adhesion to skin was evaluated in the same manner as in [1. UV protection agent].

[0185] [Smooth feel when used] A use test was conducted on the samples of each Example and Comparative Example by 20 expert panelists, who each evaluated them on a four-point scale using the absolute criteria below. The average score was calculated from the total scores of all panelists, and the results were evaluated from A to D according to the following criteria. Specifically, an appropriate amount of each sample was applied to the skin, and the smoothness upon application (absence of squeaky or sticky feeling) was evaluated. (Absolute criteria) 3: Very smooth with no squeaky or sticky feeling 2: Smooth with no squeaky or sticky feeling 1: Slight squeaky or sticky feeling, but smooth 0: Slight squeaky or sticky feeling, not smooth (Evaluation criteria) A: 2.5 points or more B: 2 points or more but less than 2.5 points C: 1 point or more but less than 2 points D: Less than 1 point

[0186] In view of the above-mentioned effect measurements and evaluation of the feeling of use, it can be said that the influence of each of the components (a), (B), (D), (G), and (H) on the UV protection effect and feeling of use generally tends to be as shown in Table 21 below. However, the degree of influence varies depending on the compounded components.

[0187]

[0188] Specifically, it was found that when UV protection agents were prepared by freeze-drying, particularly by blending components (a), (B), (D), (G), and (H), the UV protection effect was significantly improved compared to when UV protection agents were prepared by conventional drying. This is evident, for example, from a comparison of all Examples and all Comparative Examples. However, since the rate of increase in UV protection improvement effect tends to decrease depending on the nonionic surfactant of component (B), it can be said that component (B) is preferably selected from the group of component (B1) shown in each table, i.e., polyglyceryl-10 laurate, polyglyceryl-10 oleate, olive oil glycereth-8 esters, polysorbate 80, PEG-20 methyl glucose sesquistearate, and polysorbate 60.

[0189] Furthermore, it was found that the incorporation of components (a), (B), (D), and (G), especially components (a), (B), and (D), improved the aggregation of the hydrophobic scattering agent, which is a particularly particulate component in the UV protection agent, resulting in a moderate amount of torrential rain. This is evident, for example, from a comparison of all the Examples with all the Comparative Examples. It was also found that the incorporation of the hydrophobized UV scattering agent of component (a) significantly contributed to improved adhesion to the skin and a smooth feel in use. For example, as is clear from a comparison of Examples 48 to 57 with Comparative Examples 9 to 12, even when the same UV scattering agent, such as zinc oxide or titanium oxide, was incorporated, the UV protection agents containing the hydrophobized UV scattering agent of Examples 48 to 57 exhibited significantly improved adhesion to the skin and a smooth feel in use (improved squeaky feeling, etc.) compared to the UV protection agents containing the hydrophilic UV scattering agent of Comparative Examples 9 to 12 that had not been hydrophobized.

[0190] In the above, the present specification has described the embodiments and examples of the present invention in order to express the contents of the present invention. However, the present invention is not limited to the above embodiments and examples, and includes modifications and improvements that are obvious to those skilled in the art based on the matters described in the present specification.

[0191] The present invention relates to a solid powder ultraviolet protection agent, a method for producing the same, and a cosmetic composition. Accordingly, the present invention can be suitably used in the cosmetics manufacturing industry.

Claims

1. A solid powder ultraviolet protection agent comprising (A) an ultraviolet absorber, (B) a nonionic surfactant with an HLB value of 10 or more, and (C) a dispersibility promoter, wherein component (C) is a water-soluble polymer having an acrylic acid moiety and / or a polysaccharide having a hydrophobic group with 12 or more carbon atoms.

2. The ultraviolet protection agent according to claim 1, which has been solidified by freeze-drying.

3. The ultraviolet protection agent according to claim 1, wherein in component (C), the water-soluble polymer having an acrylic acid moiety is an acrylic acid-based water-soluble polymer having a hydrophobic group moiety with 16 to 24 carbon atoms, and the polysaccharide having a hydrophobic group with 12 or more carbon atoms is stearoxyhydroxypropylmethylcellulose.

4. The ultraviolet protection agent according to claim 1, further comprising (D) a polysaccharide.

5. The ultraviolet protection agent according to claim 1, wherein component (D) is a polysaccharide that is solid at 25°C.

6. The ultraviolet protection agent according to claim 1, further comprising (E) at least one ultraviolet scattering agent selected from titanium oxide and zinc oxide.

7. The ultraviolet protection agent according to claim 6, wherein component (E) contains, as component (E1), at least one selected from titanium oxide and zinc oxide having an average particle size of 100 nm or less.

8. The ultraviolet protection agent according to claim 1, wherein component (A) contains at least ethylhexyl methoxycinnamate.

9. The ultraviolet protection agent according to claim 1, wherein component (B) is a nonionic surfactant having an HLB value of 10 or more and includes one having a polyglycerin skeleton or a sugar skeleton.

10. The ultraviolet protection agent according to claim 1, wherein the ratio of the content of component (A) to the content of component (B) is component (A) / component (B)=0.10 to 100.

11. The ultraviolet protection agent according to claim 1, wherein the ratio of the content of component (A) to the content of component (C) is component (A) / component (C)=0.50 to 1000.

12. The ultraviolet protection agent according to claim 7, wherein the ratio of the content of component (A) to the content of component (E1) is component (A) / component (E1)=0.02 to 10.

13. The ultraviolet protection agent according to claim 1, further comprising (F) silica having an oil absorption of 30 ml / 100 g or more.

14. The ultraviolet protection agent according to claim 13, wherein component (F) is silica having an oil absorption of 100 ml / 100 g or more.

15. The UV protection agent according to claim 1, wherein component (D) contains at least cellulose gum (sodium carboxymethylcellulose) or hydroxypropyl methylcellulose.

16. Density is 0.3 to 1.5 g / cm ３ 2. The ultraviolet protection agent according to claim 1, wherein 17. A cosmetic containing the ultraviolet protection agent according to claim 1.

18. A method for producing a solid powdered ultraviolet protection agent, comprising the steps of: obtaining a mixture by mixing (A) an ultraviolet absorber, (B) a nonionic surfactant having an HLB value of 10 or more, and (C) a dispersibility enhancer with water, wherein component (C) is both or either a water-soluble polymer having an acrylic acid moiety and a polysaccharide having a hydrophobic group having 12 or more carbon atoms; filling the mixture into a mold and freezing it to obtain a frozen product; and drying the frozen product in a vacuum dryer.

Images