Aqueous dispersion of inorganic powder subjected to surface hydrophobization treatment and cosmetic containing same

Abstract

A dispersion obtained by dispersing an inorganic powder, which has been subjected to a surface hydrophobization treatment, in water is obtained. The dispersion medium of the dispersion is water, so that the dispersion is easy to handle. When used in a cosmetic or the like, the composition can be suitably used in a water-based cosmetic in which an inorganic powder that has been subjected to a surface hydrophobization treatment has been blended. Provided are: a dispersion which is obtained by uniformly dispersing a surface-hydrophobized inorganic powder in water, and which is capable of stably dispersing a surface-hydrophobized inorganic powder in water by using a dialkylsulfosuccinate or an alkylsulfoacetate as a dispersant; also provided is a cosmetic which, by using the aqueous inorganic powder dispersion, has high water resistance and feels moist when used.

Description

Technical Field

[0001] The present invention relates to an aqueous dispersion of an inorganic powder subjected to surface hydrophobization treatment and a cosmetic containing the aqueous dispersion. Background Art

[0002] Conventionally, in the case of stably dispersing an inorganic powder in water or an aqueous medium, a hydrophilic powder or a powder subjected to hydrophilization treatment is used. On the other hand, in the case of blending a hydrophobized powder in water or an aqueous medium, a large amount of an ionic surfactant such as alkyl phosphate, polyoxyethylene-added alkyl ether phosphate, or lecithin, or a surfactant derived from a natural product (see Patent Document 1) is used as a dispersant to disperse it in water. Moreover, as a method for improving the dispersibility of the powder in water, a method of hydrophilizing the powder can be cited. For example, the techniques disclosed in Patent Documents 2 to 4 can be cited. Patent Documents 2 and 3 disclose a technique related to a coating treatment using a water-soluble cationic polymer and a low-molecular-weight organosilicon derivative, and Patent Document 4 discloses a technique of surface-treating a polyether-modified silane. In the case of using such a hydrophilic powder, it can be easily added to an aqueous composition, and the blending amount can also be increased, so it has the advantage of easily exhibiting the characteristics of the powder.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2013-116864

[0006] Patent Document 2: Japanese Patent No. 4250551

[0007] Patent Document 3: Japanese Patent No. 4475970

[0008] Patent Document 4: Japanese Patent Application Laid-Open No. 2003-26958 Summary of the Invention

[0009] However, since the powder itself is hydrophilic, there is a problem that it is difficult to obtain a coating film having sufficient water resistance in the form of an aqueous dispersion of an inorganic powder. In addition, if a large amount of the above-described dispersant is blended as a method for blending a hydrophobized powder in water or an aqueous medium, it is also difficult to obtain a coating film having sufficient water resistance.

[0010] The present invention has been made in view of the above circumstances, and an object thereof is to provide an aqueous dispersion of an inorganic powder having high dispersibility of an inorganic powder subjected to surface hydrophobization treatment and high water resistance during use, and a cosmetic using the aqueous dispersion and having excellent usability and water resistance.

[0011] In order to achieve the foregoing object, the present inventors conducted in-depth research and found that: when dialkyl sulfosuccinate and / or alkyl sulfoacetate are used, the surface-hydrophobized inorganic powder is stably dispersed in water; when using the aqueous dispersion of the inorganic powder, a cosmetic having high water resistance and good usability (such as a moist feeling) can be obtained, and the present invention was completed.

[0012] That is, the aqueous dispersion of the surface-hydrophobized inorganic powder of the present invention is characterized by containing the following components (A), (B) and (C).

[0013] (A) Surface-hydrophobized inorganic powder

[0014] (B) Dialkyl sulfosuccinate or alkyl sulfoacetate

[0015] (C) Water

[0016] Moreover, the cosmetic of the present invention is characterized by containing the aqueous dispersion of the surface-hydrophobized inorganic powder of the present invention. Detailed Description

[0017] Next, the detailed embodiments of the aqueous dispersion of the surface-hydrophobized inorganic powder of the present invention and the cosmetic containing the aqueous dispersion will be described. It should be noted that in this specification, "X to Y" representing a range means "X or more and Y or less". In addition, unless otherwise specified, the operations are carried out under the conditions of room temperature (20°C to 30°C) / relative humidity 45 to 55% RH. Furthermore, it should be understood that the combinations of all embodiments have been disclosed in the present application.

[0018] For the aqueous dispersion of the surface-hydrophobized inorganic powder of the present invention, the surface-hydrophobized inorganic powder has high dispersibility, and this dispersibility can be maintained over time, and furthermore, it has high water resistance. In addition, the cosmetic containing this aqueous dispersion has high water resistance and excellent moist usability. In addition, the cosmetic containing the aqueous dispersion of the surface-hydrophobized inorganic powder of the present invention can be a cosmetic that is refreshing, has no or almost no sticky feeling and dry feeling, and has no or almost no powdery feeling.

[0019] <Aqueous Dispersion>

[0020] (Component (A): Surface-hydrophobized inorganic powder)

[0021] The inorganic powder (hydrophobized master powder) used in component (A) is not particularly limited, and examples thereof include: commonly used zinc oxide, titanium dioxide, cerium oxide, iron oxides, barium sulfate, calcium carbonate, silica, aluminum hydroxide, alumina, boron nitride, talc, mica, kaolin, etc. As the above inorganic powder, it is preferably at least one selected from the group consisting of titanium dioxide, zinc oxide, iron oxides, cerium oxide, and their composites, and particularly preferably an inorganic powder having ultraviolet absorption / scattering ability (ultraviolet shielding effect) (hereinafter also referred to as ultraviolet shielding particles). As the inorganic powder having ultraviolet shielding effect, it is particularly preferably at least one selected from the group consisting of zinc oxide, titanium dioxide, and cerium oxide. The inorganic powder having ultraviolet shielding effect is conventionally used in cosmetic applications, and thus is also preferred from the viewpoint of being easily incorporated into aqueous cosmetics. Moreover, when using these inorganic powders, it is possible to easily form an inorganic film having ultraviolet shielding effect, and thus is also preferred from this viewpoint. Among them, as the inorganic powder, zinc oxide and / or titanium dioxide are particularly preferred. Two or more kinds of these inorganic powders can also be used simultaneously.

[0022] The inorganic powder used in the aqueous dispersion of the present invention can also be a composite powder in which the surface of the inorganic powder is covered with other inorganic materials. The inorganic material in this case can be a known inorganic surface treatment material, and examples thereof include: zinc oxide, titanium dioxide, cerium oxide, iron oxides, barium sulfate, hydrous silicic acid, silica, aluminum hydroxide, alumina, etc. The covering amount of the inorganic material is preferably 1 to 25% by mass based on the whole inorganic powder.

[0023] The average particle size of the above inorganic powder (hereinafter, when only the particle size is described in this specification, it refers to the average particle size) is preferably 1 to 200 nm, more preferably 10 to 200 nm, and can also be 1 to 100 nm. Especially in the case of ultraviolet shielding particles, the above average particle size is preferred. From the viewpoint of high visible light transparency and appropriate ultraviolet shielding ability, ultraviolet shielding particles having such a particle size are particularly preferred. In addition, when the above inorganic powder is not an ultraviolet shielding particle and there is no need for ultraviolet shielding ability, the particle size is the size most suitable for using the particle. It should be noted that the particle size of the above inorganic powder is measured by the following method: 200 particles are randomly selected in an electron microscope and their particle sizes are measured, and the average of the primary particle sizes is calculated.

[0024] The shape of the above inorganic powder is not particularly limited, and any shape such as spherical, rod-shaped, needle-shaped, spindle-shaped, plate-shaped, etc. can be used. It should be noted that in the case of rod-shaped, needle-shaped, and spindle-shaped particles, the above average particle size is defined by the average of the lengths on the short axis side, and in the case of plate-shaped particles, it is defined by the average of the diagonal lengths of the surface.

[0025] As the method for surface hydrophobization treatment of the above inorganic powder, there is no particular limitation, and known methods can be used. The surface hydrophobization treatment is a treatment that reduces the affinity between the surface of the inorganic powder and water. The surface treatment using a material that is easily soluble in water or dispersible in water after the treatment does not belong to the "surface hydrophobization treatment" of the present invention.

[0026] As the above surface hydrophobization treatment, more specifically, for example, treatments using surface treatment agents such as silicone oil, fatty acid, alkoxysilane (such as alkylalkoxysilane, etc.) can be cited. These surface treatments can be carried out alone or in combination. In a preferred embodiment of the present invention, the inorganic powder subjected to surface hydrophobization treatment is an inorganic powder obtained by treatment with at least one selected from the group consisting of silicone oil, fatty acid, and alkoxysilane.

[0027] It should be noted that as the silicone oil, so-called linear silicone oils such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane (hydrogenated polydimethylsiloxane), etc. can be cited; so-called branched silicone oils such as triethoxysilylethylpolydimethylsiloxylethylpolydimethylsiloxane, etc. can be cited. As the fatty acid, stearic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, etc. can be cited. As the alkoxysilane, alkylalkoxysilane, arylalkoxysilane, etc. can be cited, and methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, hexyltrimethoxysilane, hexyltriethoxysilane, octyltriethoxysilane, decyltrimethoxysilane, etc. can be cited.

[0028] Moreover, among these, from the viewpoint of being able to make the dispersibility in water better, as the surface treatment agent, it is preferable to use at least one selected from the group consisting of dimethylpolysiloxane, methylhydrogenpolysiloxane, stearic acid, isostearic acid, and octyltriethoxysilane, and among them, octyltriethoxysilane is further preferably used.

[0029] In the above surface hydrophobization treatment of the inorganic powder, it is preferable to carry out the above surface hydrophobization treatment at a ratio of 1 to 12% by mass, 2 to 12% by mass based on the total amount of the treated inorganic powder. If it is above the above lower limit, the hydrophobicity can be sufficiently ensured, and if it is below the above upper limit, the cost benefit brought by the saturation of the hydrophobic effect can be enjoyed.

[0030] As the treatment method for obtaining the above inorganic powder subjected to surface hydrophobization treatment, the surface treatment agent can be dissolved or dispersed in an appropriate organic solvent, and after stirring and mixing the mixed solution with the required powder, the organic solvent is removed to obtain the inorganic powder subjected to surface hydrophobization treatment.

[0031] Examples of the organic solvent used herein include alcohols such as ethanol, isopropanol, and isobutanol; hydrocarbon-based organic solvents such as toluene, n-hexane, and cyclohexane; and polar organic solvents such as acetone, ethyl acetate, and butyl acetate.

[0032] The aqueous dispersion of the present invention preferably contains component (A) in a proportion of 10 to 60% by mass, 15 to 55% by mass, or 20 to 50% by mass relative to the total amount of the aqueous dispersion. By setting the proportion of component (A) within the above range, the dispersibility of the aqueous dispersion becomes further improved.

[0033] (Component (B): Dialkyl sulfosuccinate and / or alkyl sulfacetate)

[0034] The dialkyl sulfosuccinate as component (B) is obtained, for example, by reacting an alcohol with maleic anhydride to form a diester and then sulfating it. As the alcohol used, a linear or branched alcohol having 6 to 22 carbon atoms is preferred, and a linear or branched alcohol having 6 to 12 carbon atoms is more preferred. In addition, the alcohol may be a saturated alcohol or an unsaturated alcohol, but a saturated alcohol is preferred. Examples of the alcohol used include hexanol, octanol, decanol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, 2-ethylhexanol, 2-methyldodecanol, etc. Among them, as the alcohol used, 2-ethylhexanol, hexanol, octanol, decanol, or lauryl alcohol is preferred. In addition, examples of the salt of the dialkyl sulfosuccinate include alkali metals such as sodium and potassium; lower alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine; ammonia, etc. Among them, alkali metal salts such as sodium and potassium are preferably used; sodium salts are more preferably used. In addition, commercially available products of dialkyl sulfosuccinate can be used.

[0035] The two alkyl groups constituting the dialkyl sulfosuccinate are preferably each independently a linear or branched alkyl group having 6 to 22 carbon atoms, more preferably a linear or branched alkyl group having 6 to 12 carbon atoms. Specific examples of the alkyl group include n-hexyl, n-octyl, 2-ethylhexyl, n-decyl, lauryl, myristyl, stearyl, etc.

[0036] Specific examples of the dialkyl sulfosuccinate include sodium dihexyl sulfosuccinate, sodium diethylhexyl sulfosuccinate, sodium lauryl sulfosuccinate, etc.; sodium diethylhexyl sulfosuccinate is particularly preferred.

[0037] Furthermore, the alkylsulfonacetate as component (B) is an ester salt of an alcohol (ROH) and sulfonacetic acid (C2H4O5S). Examples of the alkylsulfonacetate include salts of alkylsulfonacetic acid in which the carbon number of the alkyl group (R of the above alcohol) is 8 to 20 (preferably 10 to 20, 10 to 18, or 10 to 16). In addition, examples of the salt of the alkylsulfonacetate include alkali metals such as sodium and potassium; lower alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine; ammonia, etc. Among them, alkali metal salts such as sodium and potassium are preferably used; sodium salts are more preferably used. In addition, commercially available products can be used as the alkylsulfonacetate. Preferred examples of the alkylsulfonacetate include sodium octylsulfonacetate, sodium laurylsulfonacetate, and sodium myristylsulfonacetate; sodium laurylsulfonacetate is more preferred.

[0038] From the viewpoint of improving dispersibility, component (B) is particularly preferably sodium diethylhexyl sulfosuccinate and / or sodium laurylsulfonacetate.

[0039] Component (B) can be used alone as one kind, or two or more kinds can be used simultaneously.

[0040] The content of component (B) in the aqueous dispersion of the present invention can be appropriately set. In the aqueous dispersion, for example, it is 1% by mass or more and 10% by mass or less, can also be 3% by mass or more and 8% by mass or less, can also be 4% by mass or more and 7% by mass or less, and can also be 5% by mass or more and 6% by mass or less. When it is 1% by mass or more, the dispersibility of the surface-hydrophobized inorganic powder in water becomes further good. When it is 10% by mass or less, when the aqueous dispersion is incorporated into cosmetics, the usability of the cosmetics becomes better.

[0041] (Component (C): Water)

[0042] Component (C) in the aqueous dispersion of the present invention is water. Specifically, as water, purified water is preferred. For example, deionized water (ion-exchanged water), pure water, ultrapure water, distilled water, etc. are preferably used.

[0043] The content of component (C) in the aqueous dispersion of the present invention can be appropriately set. In the dispersion, for example, it is 30 to 85% by mass, and can also be 35 to 80% by mass.

[0044] (Other components)

[0045] For the aqueous dispersion of the present invention, it is preferred that the aqueous dispersion contains components other than components (A), (B), and (C) in a proportion not exceeding 20% by mass. However, within the range not detrimental to the performance of the aqueous dispersion, other components may be contained in a proportion of 20% by mass or less, more preferably 10% by mass or less, and may also be 5% by mass or less, 3% by mass or less, 1% by mass or less, or 0% by mass. However, it is preferred not to add compounds or the like that may impair the stability of the aqueous dispersion.

[0046] As such components that can be added, there is no particular limitation, and examples thereof include polyhydric alcohols and preservatives. That is, the dispersion containing the above components may deteriorate due to storage conditions and storage period. To prevent such deterioration, polyhydric alcohols and preservatives can be added. There is no particular limitation on such polyhydric alcohols and preservatives. For example, as polyhydric alcohols, propylene glycol, 1,3-butanediol, dipropylene glycol, 1,2-pentanediol, hexylene glycol, 1,3-propanediol, 1,2-hexanediol, etc. can be cited. The polyhydric alcohols can be used alone or two or more thereof can be used simultaneously. As preservatives, methyl p-hydroxybenzoate and other p-benzoates, sodium benzoate, phenoxyethanol, sodium dehydroacetate, etc. can be cited. The preservatives can be used alone or two or more thereof can be used simultaneously. Each of these components can exhibit anti-corrosion performance and can be added within the range not adversely affecting the performance of the dispersant.

[0047] As the specific addition amount, the above polyhydric alcohols and preservatives can be set to, for example, 20% by mass or less or 15% by mass or less in total relative to the aqueous dispersion, more preferably 10% by mass or less, and may also be 5% by mass or less, 3% by mass or less, 1% by mass or less, 0.5% by mass or less. Among them, the aqueous dispersion particularly preferably contains polyhydric alcohols such as propylene glycol, 1,3-butanediol, dipropylene glycol, 1,2-pentanediol, hexylene glycol, 1,3-propanediol, 1,2-hexanediol, etc.; preferably contains at least one selected from the group consisting of 1,3-butanediol, dipropylene glycol, 1,2-pentanediol, and 1,2-hexanediol; particularly preferably contains at least one selected from the group consisting of 1,3-butanediol, 1,2-pentanediol, and 1,2-hexanediol. The above polyhydric alcohols are often used as humectants in cosmetics and also have the effect of a preservative due to their antibacterial properties.

[0048] Furthermore, as components that can be added to the aqueous dispersion, pH regulators can be cited. Examples of pH regulators include buffers such as lactic acid - sodium lactate, citric acid - sodium citrate, succinic acid - sodium succinate, etc. The pH regulator can be used alone as one kind, or two or more kinds can be used simultaneously. In addition, as components that can be added to the aqueous dispersion, masking agents can be cited. Examples of masking agents include: 1 - hydroxyethane - 1,1 - diphosphonic acid, tetrasodium 1 - hydroxyethane - 1,1 - diphosphonate, disodium edetate, trisodium edetate, tetrasodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, trisodium hydroxyethyl ethylenediaminetriacetate, etc. The masking agent can be used alone as one kind, or two or more kinds can be used simultaneously. As the specific addition amount, the above - mentioned pH regulator and masking agent can be set to, for example, 1% by mass or less or 0.5% by mass or less based on the total amount of the aqueous dispersion.

[0049] One preferred embodiment of the present invention is an aqueous dispersion of a surface - hydrophobized inorganic powder composed only of (A) a surface - hydrophobized inorganic powder, (B) a dialkyl sulfosuccinate and / or an alkyl sulfoacetate, and (C) water.

[0050] Another preferred embodiment of the present invention is an aqueous dispersion of a surface - hydrophobized inorganic powder composed only of (A) a surface - hydrophobized inorganic powder, (B) a dialkyl sulfosuccinate and / or an alkyl sulfoacetate, (C) water, and a polyol and / or a preservative. The aforementioned polyol is at least one selected from the group consisting of propylene glycol, 1,3 - butanediol, dipropylene glycol, 1,2 - pentanediol, hexylene glycol, 1,3 - propanediol, and 1,2 - hexanediol. In addition, the aforementioned polyol is at least one selected from the group consisting of 1,3 - butanediol, 1,2 - pentanediol, and 1,2 - hexanediol. The aforementioned preservative is at least one selected from the group consisting of p - benzoate, sodium benzoate, phenoxyethanol, ethanol, and sodium dehydroacetate. For the content of the polyol and / or the preservative in this embodiment, the total amount in the aqueous dispersion can be 0.1 - 20% by mass, 0.5 - 15% by mass, 1 - 15% by mass, or 2 - 10% by mass.

[0051] Another preferred embodiment of the present invention is an aqueous dispersion of an inorganic powder having a surface hydrophobized treatment, which is composed of only (A) an inorganic powder having a surface hydrophobized treatment, (B) a dialkyl sulfosuccinate and / or an alkyl sulfacetate, (C) water, and a polyol. The aforementioned polyol is at least one selected from the group consisting of propylene glycol, 1,3-butanediol, dipropylene glycol, 1,2-pentanediol, hexanediol, 1,3-propanediol, and 1,2-hexanediol. In addition, the aforementioned polyol is at least one selected from the group consisting of 1,3-butanediol, 1,2-pentanediol, and 1,2-hexanediol. For the content of the polyol in this embodiment, it can be 0.1 to 20% by mass, 0.5 to 15% by mass, 1 to 15% by mass, or 2 to 10% by mass in total in the aqueous dispersion.

[0052] Another preferred embodiment of the present invention is an aqueous dispersion of an inorganic powder having a surface hydrophobized treatment, which is composed of only (A) an inorganic powder having a surface hydrophobized treatment, (B) a dialkyl sulfosuccinate and / or an alkyl sulfacetate, (C) water, and at least one selected from the group consisting of a polyol, a preservative, a pH adjuster, and a masking agent. For the content of at least one selected from the group consisting of a polyol, a preservative, a pH adjuster, and a masking agent in this embodiment, it can be 0.1 to 20% by mass, 0.5 to 15% by mass, 1 to 15% by mass, or 2 to 10% by mass in total in the aqueous dispersion.

[0053] The aqueous dispersion of the present invention is usually in a liquid state. Specifically, for the viscosity of the aqueous dispersion, for example, the viscosity value measured with a B-type viscometer is 10 to 5000 mPa·s.

[0054] For the dispersion method for obtaining the aqueous dispersion of the present invention, as long as it is a known method capable of uniform dispersion, any method can be used. Various dispersers such as a wet bead mill, a homogenizer, a disperser, a kneader, a kneading extruder, and a roll mill can be used, and a wet bead mill is more preferred.

[0055] <Cosmetics>

[0056] Another embodiment of the present invention is a cosmetic containing the above aqueous dispersion.

[0057] The aqueous dispersion of the present invention can also be directly incorporated into cosmetics. In this case, by mixing the dispersion with various components used in cosmetics, a cosmetic (composition) can be obtained. The amount of the aqueous dispersion incorporated into the cosmetics is preferably 2% by mass to 80% by mass.

[0058] In the thus obtained cosmetic, the water dispersion of the surface-hydrophobized inorganic powder can be suitably dispersed in the aqueous composition. Thereby, an aqueous composition having stable ultraviolet ray-defending performance can be obtained. In addition, a state in which the hydrophobized powder is dispersed in the aqueous phase can also be formed in the emulsion. From the viewpoint of being able to obtain a different feel from conventional cosmetics in which powder is dispersed in the oil phase, this special-form cosmetic is preferred.

[0059] In addition, the cosmetic containing the above dispersion has particularly high water resistance in systems where the aqueous phase is the outer phase, such as aqueous cosmetics and oil-in-water type cosmetics. In aqueous cosmetics and oil-in-water type cosmetics, the water dispersion can uniformly exist in the outer phase, so the hydrophobized powder uniformly exists in the outer phase. Therefore, when applied to the skin, a film with uniform hydrophobicity brought by the hydrophobized powder is easily formed. Therefore, it is considered that the water resistance becomes high. Furthermore, for compositions having an aqueous outer phase such as aqueous cosmetics and oil-in-water type cosmetics, by adding the dispersion to the aqueous phase of the outer phase after obtaining the composition other than the dispersion, a cosmetic can be easily obtained.

[0060] The above cosmetic is not particularly limited, and by mixing cosmetic raw materials in the aqueous dispersion of the present invention as needed, cosmetics for ultraviolet ray defense such as sunscreen agents, base makeup cosmetics such as foundations, and key makeup cosmetics such as lipsticks can be obtained. Among them, it is particularly suitable for sunscreen agents.

[0061] The above cosmetic can be made into any form of aqueous cosmetics, oil-in-water type cosmetics, or water-in-oil type cosmetics.

[0062] In the cosmetic, it is preferable to further contain component (D) a water-soluble polymer and / or an inorganic thickener on the basis of the above aqueous dispersion. In this mode, aqueous cosmetics and oil-in-water type cosmetics are preferred. Oil-in-water type cosmetics and aqueous-based cosmetics have an aqueous component as the main component, so it is easy to obtain a light feeling in use. However, when a water-soluble polymer and an inorganic thickener are blended, their compatibility with the inorganic powder is poor, and aggregation and sedimentation of the powder are likely to occur. By using the above dispersion simultaneously in a system containing a water-soluble polymer and / or an inorganic thickener, a cosmetic having no or almost no powder aggregation and sedimentation and excellent storage stability over time can be obtained.

[0063] Regarding the water-soluble polymer and / or inorganic thickener as the component (D) of the present invention, known water-soluble polymers and / or inorganic thickeners that can be used in cosmetics can be incorporated. As the water-soluble polymer, for example, the following can be mentioned: natural polymers such as gum arabic, tragacanth gum, galactan, guar gum, locust bean gum, karaya gum, carrageenan, pectin, agar, quince seed, algae colloid (brown algae extract), starch (rice, corn starch, potato, wheat), licorice, xanthan gum, dextran, succinoglycan, pullulan, gellan gum, Kelco gum, mannan, thermogel polysaccharide, locust bean gum, scleroglucan; animal polymers such as collagen, casein, albumin, gelatin; starch polymers such as carboxymethyl starch, methyl hydroxypropyl starch; cellulose polymers such as methyl cellulose, nitrocellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxycellulose, hydroxyethyl cellulose, carboxymethyl cellulose, carboxymethyl cellulose sodium, cellulose sulfate, microcrystalline cellulose, cellulose gum, cationic cellulose, hydroxypropyl methyl cellulose stearoxy ether; alginic acid polymers such as alginic acid, sodium alginate, propylene glycol alginate; vinyl polymers such as polyvinyl alcohol, polyvinyl acetate, copolymer of vinyl pyrrolidone and vinyl acetate, polyvinyl methyl ether, polyvinyl pyrrolidone, alkyl-modified carboxyvinyl polymer, carboxyvinyl polymer (carbomer); polyoxyethylene or polyoxypropylene copolymer polymers such as polyethylene glycol, polyethyleneimine, PEG-240 / HDI copolymer bis-decyltetradecyl polyether-20 ether; acrylic polymers such as sodium polyacrylate, polyacrylamide, alkanolamine polyacrylate, copolymer of alkyl methacrylate and dimethylaminoethyl methacrylate, poly-2-acrylamido-2-methylpropanesulfonic acid, polyacryloyloxytrimethylammonium, acryloyldimethyltaurine ammonium / VP copolymer, cross-linked polymer of dimethylacrylamide / sodium acryloyldimethyltaurate, cross-linked polymer of dimethylacrylamide / sodium acryloyldimethyltaurate, copolymer of sodium acrylate / sodium acryloyldimethyltaurate, acrylate / stearyl alcohol polyether-20 methacrylate copolymer, acrylate / C10-30 alkanol acrylate cross-linked polymer, hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer, copolymer of sodium acrylate / sodium acryloyldimethyltaurate, acryloyldimethyltaurine ammonium / behenyl alcohol polyether-25 methacrylate cross-linked polymer, ethyl polyacrylate, polyalkylacrylamide / polyacrylamide copolymer, acryloyldimethyltaurine ammonium / carboxyethyl acrylate cross-linked polymer, acryloyldimethyltaurine ammonium / VP copolymer, polyacrylate cross-linked polymer-6, etc.

[0064] Furthermore, examples of the inorganic thickener as component (D) of the present invention include silicic acid anhydride, aluminum silicate, sodium silicate, magnesium aluminum silicate, sodium magnesium silicate, sodium magnesium fluosilicate, lithium magnesium silicate (Laponite), hectorite, montmorillonite, bentonite, etc.

[0065] Component (D) is preferably at least one selected from the group consisting of xanthan gum, hydroxyethyl cellulose, carboxyvinyl polymer (carbomer), acrylate / sodium acryloyldimethyltaurate copolymer, polyacrylate cross-polymer-6, and sodium magnesium fluosilicate.

[0066] The content of component (D) in the cosmetic of the present invention is preferably 0.02 to 2% by mass. Within this range, the cosmetic becomes stable, and in addition, the viscosity is also easily made appropriate.

[0067] The above cosmetic may also simultaneously use any aqueous component and oily component that can be used in the cosmetic field. The above aqueous component and oily component are not particularly limited. For example, it may contain: oil agents, surfactants, humectants, higher alcohols, masking agents, oil-soluble polymers, ultraviolet screening agents, other pharmaceutical components, various extracts, coloring agents such as organic dyes, preservatives, antioxidants, pigments, thickeners, pH regulators, edible flavors, cooling agents, antiperspirants, bactericides, skin activators, various powders, etc.

[0068] The above oil agents are not particularly limited. For example, it can be exemplified: natural animal and plant oils and fats (for example, olive fruit oil, mink oil, castor seed oil, palm oil, beef tallow, evening primrose oil, coconut oil, castor seed oil, cocoa butter, macadamia integrifolia oil, etc.); waxes (for example, jojoba seed oil, beeswax, lanolin, carnauba wax, candelilla wax, etc.); higher alcohols (for example, lauryl alcohol, stearyl alcohol, cetyl alcohol, oleyl alcohol, etc.); higher fatty acids (for example, lauric acid, palmitic acid, stearic acid, oleic acid, behenic acid, lanolin fatty acid, etc.); higher aliphatic hydrocarbons (for example, liquid paraffin, solid paraffin, squalane, petrolatum, pure ozokerite, microcrystalline wax, etc.); synthetic ester oils (for example, butyl stearate, hexyl laurate, diisopropyl adipate, diisopropyl sebacate, octyldodecyl myristate, isopropyl myristate, isopropyl palmitate, isopropyl myristate, cetyl alcohol isooctanoate, neopentyl glycol dicaprate); silicone derivatives (for example, silicone oils such as methyl silicone oil, methylphenyl silicone oil, etc.). It is also possible to further incorporate oil-soluble vitamins, preservatives, whitening agents, etc.

[0069] Examples of the surfactant described above include lipophilic nonionic surfactants, hydrophilic nonionic surfactants, etc. There is no particular limitation on the lipophilic nonionic surfactant described above, and examples thereof include sorbitan fatty acid esters such as sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, diglycerol dehydrosorbitol penta-2-ethylhexanoate, and diglycerol dehydrosorbitol tetra-2-ethylhexanoate; glycerol polyglycerol fatty acid esters such as glycerol monocottonseed fatty acid ester, glycerol monoeicosanoate, glycerol sesquioleate, glycerol monostearate, glycerol α,α’-oleoyl pyroglutamate, and glycerol monostearate / malic acid ester; propylene glycol fatty acid esters such as propylene glycol monostearate; hydrogenated castor oil derivatives, glycerol alkyl ethers, etc.

[0070] There is no particular limitation on the hydrophilic nonionic surfactant described above, and examples thereof include POE sorbitan fatty acid esters such as POE sorbitan monooleate, POE sorbitan monostearate, and POE sorbitan tetraoleate; POE sorbitol fatty acid esters such as POE sorbitol monolaurate, POE sorbitol monooleate, POE sorbitol pentaoleate, and POE sorbitol monostearate; POE glycerol fatty acid esters such as POE glycerol monostearate, POE glycerol monoisostearate, and POE triglycerol isostearate; POE fatty acid esters such as POE monooleate, POE distearate, POE mono-dioleate, and ethylene glycol distearate; POE alkyl ethers such as POE lauryl ether, POE oleyl ether, POE stearyl ether, POE behenyl ether, POE 2-octyldodecyl ether, and POE cholesteryl ether; POE alkylphenyl ethers such as POE octylphenyl ether, POE nonylphenyl ether, and POE dinonylphenyl ether; Pluronic type such as Pluronic; POE / POP alkyl ethers such as POE / POP cetyl ether, POE / POP 2-decyltetradecyl ether, POE / POP monobutyl ether, POE / POP hydrogenated lanolin, and POE / POP glycerol ether; tetraPOE / tetraPOP ethylenediamine condensates such as Tetronic; POE castor oil, POE hydrogenated castor oil, POE hydrogenated castor oil monoisostearate, POE hydrogenated castor oil triisostearate, POE hydrogenated castor oil monopyroglutamate monoisostearate diester, and POE hydrogenated castor oil maleic acid and other POE castor oil hydrogenated castor oil derivatives; POE sorbitol beeswax and other POE beeswax / lanolin derivatives; alkanolamides such as coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, and fatty acid isopropanolamide; POE propylene glycol fatty acid esters, POE alkylamines, POE fatty acid amides, sucrose fatty acid esters, POE nonylphenyl formaldehyde condensates, alkyl ethoxydimethylamine oxides, and trioleyl phosphate, etc.

[0071] As other surfactants, for example, anionic surfactants such as fatty acid soaps, higher alkyl sulfates, triethanolamine POE lauryl sulfate, alkyl ether sulfates, etc. can be formulated within the range where there are no problems with stability and skin irritation; cationic surfactants such as alkyltrimethylammonium salts, alkylpyridinium salts, alkyl quaternary ammonium salts, alkyl dimethylbenzylammonium salts, POE alkylamines, alkylamine salts, polyamine fatty acid derivatives, etc.; and amphoteric surfactants such as imidazoline-based amphoteric surfactants and betaine-based surfactants.

[0072] As the above-mentioned humectants, there is no particular limitation. For example, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, sulfated mucopolysaccharide, caronin acid, telopeptide-deficient collagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerol (EO)PO adduct, Rosa roxburghii fruit extract, Achillea millefolium extract, Melilotus officinalis extract, etc. can be cited.

[0073] As the above-mentioned higher alcohols, there is no particular limitation. For example, straight-chain alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetearyl alcohol, etc.; branched-chain alcohols such as monostearyl glycerol ether (batyl alcohol), 2-decyltetradecanol, lanolin alcohol, cholesterol, phytosterol, hexyl dodecanol, isostearyl alcohol, octyldodecanol, etc. can be cited.

[0074] As the masking agent, there is no particular limitation. For example, 1-hydroxyethane-1,1-diphosphonic acid, tetrasodium 1-hydroxyethane-1,1-diphosphonate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, ethylenediaminetetraacetic acid, etc. can be cited.

[0075] As the ultraviolet ray shielding agent, there is no particular limitation. For example, it may include: benzoic acid-based ultraviolet ray shielding agents such as p-aminobenzoic acid (hereinafter simply referred to as PABA), PABA monoglyceride, N,N-dipropoxyethyl p-aminobenzoate, N,N-diethoxyethyl p-aminobenzoate, N,N-dimethylethyl p-aminobenzoate, N,N-dimethylbutyl p-aminobenzoate, etc.; anthranilic acid-based ultraviolet ray shielding agents such as homomenthol N-acetylanthranilate, etc.; salicylic acid-based ultraviolet ray shielding agents such as amyl salicylate, menthyl salicylate, homomenthol salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, phenyl salicylate of isopropyl alcohol, etc.; cinnamic acid-based ultraviolet ray shielding agents such as ethylhexyl methoxycinnamate, octyl cinnamate, ethyl 4-isopropylcinnamate, methyl 2,5-diisopropylcinnamate, ethyl 2,4-diisopropylcinnamate, methyl 2,4-diisopropylcinnamate, propyl p-methoxycinnamate, isopropyl p-methoxycinnamate, isoamyl p-methoxycinnamate, 2-ethoxyethyl p-methoxycinnamate, cyclohexyl p-methoxycinnamate, ethyl α-cyano-β-phenylcinnamate, 2-ethylhexyl α-cyano-β-phenylcinnamate, glycerol 2-ethylhexanoyl di(p-methoxycinnamate), etc.; benzophenone-based ultraviolet ray shielding agents such as 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl 4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octyloxybenzophenone, 4-hydroxy-3-carboxybenzophenone, etc.; 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor, urocanic acid, ethyl urocanate, 2-phenyl-5-methylbenzoxazole, 2,2'-dihydroxy-5-methylphenylbenzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, dibenzylazine, dianisoylmethane, 4-methoxy-4'-tert-butyldibenzoylmethane, 5-(3,3-dimethyl-2-norbornenylidene)-3-pentan-2-one, etc.

[0076] As other pharmaceutical ingredients, there is no particular limitation, and for example, the following can be listed: vitamin A oil, retinol, retinol palmitate, inositol, pyridoxine hydrochloride, benzyl nicotinate, nicotinamide, DL-α-tocopherol nicotinate, magnesium ascorbyl phosphate, 2-O-α-D-glucopyranosyl-L-ascorbic acid, vitamin D2 (ergocalciferol), dl-α-tocopherol, dl-α-tocopherol acetate, pantothenic acid, biotin and other vitamins; estradiol, ethinyl estradiol and other hormones; arginine, aspartic acid, cystine, cysteine, methionine, serine, leucine, tryptophan and other amino acids; allantoin, azulene and other anti-inflammatory agents; arbutin and other whitening agents; tannic acid and other astringents; L-menthol, camphor and other cooling agents, sulfur, lysozyme, pyridoxine hydrochloride, etc.

[0077] As various extracts, there is no particular limitation, and for example, the following can be listed: Houttuynia cordata extract, Phellodendron amurense bark extract, Melilotus officinalis extract, Lamium album extract, Glycyrrhiza glabra extract, Paeonia lactiflora extract, Saponaria officinalis leaf / root extract, Luffa cylindrica extract, Cinchona ledgeriana bark extract, Saxifraga stolonifera extract, Sophora flavescens extract, Nuphar japonicum root extract, Foeniculum vulgare fruit extract, Primula vulgaris extract, Rosa multiflora extract, Rehmannia glutinosa extract, Citrus limon extract, Lithospermum erythrorhizon extract, Aloe vera extract, Acorus calamus root extract, Eucalyptus globulus leaf extract, Equisetum arvense extract, Salvia officinalis extract, Thymus vulgaris extract, Camellia sinensis extract, Sargassum extract, Scutellaria baicalensis extract, Syringa vulgaris extract, Rubus idaeus extract, Melissa officinalis extract, Daucus carota extract, Aesculus hippocastanum extract, Prunus persica extract, Prunus persica leaf extract, Morus alba extract, Centaurea cyanus extract, Hamamelis mollis extract, (animal) placental protein, thymus extract, silk extract, Glycyrrhiza glabra extract, etc.

[0078] As the above various powders, the following can be listed: brightening coloring pigments such as iron oxide red, iron oxide yellow, iron oxide black, mica titanium, iron oxide-coated mica titanium, titanium dioxide-coated glass flakes; inorganic powders such as mica, talc, kaolin, sericite; organic powders such as polyethylene powder, nylon powder, crosslinked polystyrene, cellulose powder, silicone powder, etc. Preferably, in order to improve the sensory characteristics and the durability of makeup, a part or all of the powder components are hydrophobized with substances such as silicone-based materials, fluorine compounds, metal soaps, oil agents, acyl glutamates, etc. by a known method and used. In addition, composite powders that do not belong to the above-mentioned surface-hydrophobized inorganic powders can also be mixed and used.

[0079] Examples

[0080] The present invention will be described in more detail based on the examples, but the present invention is not limited to these examples. It should be noted that in the examples and comparative examples, "%" means mass % unless otherwise specified.

[0081] (Examples 1-2, Comparative Examples 1-12)

[0082] Add 75 g of water (purified water) and 5 g of component (B) in Table 1 (or component (B') corresponding to component (B)) to a mayonnaise bottle. Further add 20 g of a powder obtained by surface-treating fine particle titanium dioxide (MT-05: particle size 10 nm, manufactured by TAYCA Corporation) with octyltriethoxysilane (5 mass%) and 100 g of glass beads. Disperse using a paint stirrer. After separating the beads, obtain the aqueous dispersions of Examples 1-2 and Comparative Examples 1-12 as shown in Table 1 and Table 2.

[0083] (Example 3)

[0084] Add 75 g of water (purified water) and 5 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.) to a mayonnaise bottle. Further add 20 g of a powder obtained by surface-treating fine particle titanium dioxide (MT-100SA: particle size 15 nm, manufactured by TAYCA Corporation) with methylhydrogenpolysiloxane (5 mass%) and 100 g of glass beads. Disperse using a paint stirrer. After separating the beads, obtain a uniform aqueous dispersion.

[0085] (Example 4)

[0086] Add 75 g of water (purified water) and 5 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.) to a mayonnaise bottle. Further add 20 g of a powder obtained by surface-treating fine particle titanium dioxide (MT-05: particle size 10 nm, manufactured by TAYCA Corporation) with stearic acid (5 mass%) and 100 g of glass beads. Disperse using a paint stirrer. After separating the beads, obtain a uniform aqueous dispersion.

[0087] (Example 5)

[0088] Add 75 g of water (purified water) and 5 g of sodium lauryl sulfoacetate (NIKKOL LSA-F, manufactured by Nikko Chemicals Co., Ltd.) to a mayonnaise bottle. Further add 20 g of a powder obtained by surface-treating fine particle titanium dioxide (MT-100SA: particle size 15 nm, manufactured by TAYCA Corporation) with isostearic acid (5 mass%) and 100 g of glass beads. Disperse using a paint stirrer. After separating the beads, obtain a uniform aqueous dispersion.

[0089] (Example 6)

[0090] Add 41 g of water (purified water), 5 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.), and 4 g of 1,3-butanediol to a mayonnaise bottle. Further add 50 g of a powder obtained by surface-treating fine zinc oxide (MZ-500: particle size 25 nm, manufactured by TAYCA Corporation) with octyltriethoxysilane (8 mass%) and 100 g of glass beads. Disperse using a paint stirrer, and after separating the beads, a uniform aqueous dispersion is obtained.

[0091] (Example 7)

[0092] Add 51 g of water (purified water), 6 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.), and 3 g of dipropylene glycol to a mayonnaise bottle. Further add 40 g of a powder obtained by surface-treating fine titanium dioxide (MT-05: particle size 10 nm, manufactured by TAYCA Corporation) with octyltriethoxysilane (5 mass%) and 100 g of glass beads. Disperse using a paint stirrer, and after separating the beads, a uniform aqueous dispersion is obtained.

[0093] (Example 8)

[0094] Add 51 g of water (purified water), 6 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.), and 3 g of 1,2-pentanediol to a mayonnaise bottle. Further add 40 g of iron oxide yellow (OTS-2YELLOW LL-100P, manufactured by Daito Kasei Kogyo Co., Ltd.) surface-treated with octyltriethoxysilane (2 mass%) and 100 g of glass beads. Disperse using a paint stirrer, and after separating the beads, a uniform aqueous dispersion is obtained.

[0095] (Example 9)

[0096] Add 75 g of water (purified water) and 5 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.) to a mayonnaise bottle. Further add 20 g of fine cerium oxide (SI01-5 CERIGUARD SC6832: particle size 35 nm, manufactured by Daito Kasei Kogyo Co., Ltd.) surface-treated with methylhydrogenpolysiloxane (5 mass%) and 100 g of glass beads. Disperse using a paint stirrer, and after separating the beads, a uniform aqueous dispersion is obtained.

[0097] Visually observe the dispersion states of the aqueous dispersions obtained in Examples 1 to 9 and Comparative Examples 1 to 12 immediately after production and after storage at 45°C for 1 month.

[0098] Mark those that are evenly dispersed as 〇, those that are foamy and have many lumps although they are water-soluble as △, and those in which water is separated from most of the powder as ×. The results are shown in Tables 1 and 2.

[0099] [Table 1]

[0100]

[0101] It should be noted that NIKKOL in the table is manufactured by Nikko Chemicals Co., Ltd.

[0102] [Table 2]

[0103]

[0104] It should be noted that NIKKOL in the table is manufactured by Nikko Chemicals Co., Ltd., Pellicer L-30 is manufactured by Asahi Kasei Fine Chemicals Corporation, and KF-6043 is manufactured by Shin-Etsu Chemical Co., Ltd.

[0105] From the results shown in Tables 1 and 2, it can be seen that the dispersion state of the aqueous dispersion of the present invention is good and it can be applied to cosmetics. In addition, in the water repellency test described later, the contact angles of the aqueous dispersions of Examples 1 to 9 were 90° to 95°, and the water resistance was excellent.

[0106] (Example 10: Oil-in-water sunscreen)

[0107] (Ingredients)

[0108]

[0109] (Note 1): Polyacrylic acid emulsifier; SIMULGEL EG (manufactured by SEPPIC)

[0110] (Sodium acrylate / sodium acryloyldimethyl taurate copolymer, isocetane, polysorbate-80, water; containing 35 to 40% by mass of sodium acrylate / sodium acryloyldimethyl taurate copolymer)

[0111] (Manufacturing method)

[0112] A: Mix Components 1 to 4 and make them uniform.

[0113] B: Mix Components 5 and 6 and heat to make them uniform.

[0114] C: Mix Components 7 and 8 and make them uniform.

[0115] D: Add B and C to A and emulsify.

[0116] E: Add Components 9 and 10 to D to obtain an oil-in-water sunscreen.

[0117] The water-in-oil sunscreen obtained as described above has good extensibility, provides a moist and refreshing feel upon application, has high water resistance (contact angle in the water repellency test described below is 85°), has good makeup retention, shows no change over time, and has excellent stability.

[0118] It should be noted that for usability (moist feel), 10 professional evaluators aged 25 to 40 who have received training evaluated the usability (moist feel) according to the following criteria, and the result was ○.

[0119] ○: More than 7 out of 10 monitors judged it to be good.

[0120] △: 4 to 6 out of 10 monitors judged it to be good.

[0121] ×: 0 to 3 out of 10 monitors judged it to be good.

[0122] (Example 11: Oil-in-water sunscreen)

[0123] (Ingredients)

[0124]

[0125] (Note 1) Alkyl / polyether copolymer-modified silicone; KF-6038 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0126] (Manufacturing method)

[0127] A: Mix Components 1 to 5 and make them uniform.

[0128] B: Mix Components 6 to 11 and dissolve them uniformly.

[0129] C: Add B to A and emulsify to obtain an oil-in-water sunscreen.

[0130] The oil-in-water sunscreen obtained as described above has a delicate texture, good extensibility, no sticky or greasy feeling, and has a moist feeling, provides a moist and refreshing feel upon application, has very good makeup retention, and in addition has high water resistance (contact angle in the water repellency test described below is 110°), shows no change over time, and has excellent stability.

[0131] (Example 12: Water-in-oil emulsified foundation)

[0132] (Ingredients)

[0133]

[0134] (Note 1) Hydroxypropyl methylcellulose stearoxy ether; Sangelose 90L (manufactured by Daido Kasei Kogyo Co., Ltd.)

[0135] (Manufacturing method)

[0136] A: Mix components 8 - 11 and heat to dissolve.

[0137] B: Mix components 1 - 3, add components 4 - 7 thereto, and disperse and mix using a disperser.

[0138] C: Add B to A and emulsify, then add component 12 to obtain an oil-in-water type emulsified foundation.

[0139] The oil-in-water type emulsified foundation obtained as described above is excellent in terms of application feel such as good extensibility, no greasiness, and a moist feeling during use (evaluation ○ above). At the same time, the makeup retention property is very good. In addition, the water resistance is high (the contact angle in the water repellency test described later is 90°), and the storage stability is good.

[0140] (Example 13: Water-in-oil type emulsified foundation)

[0141] (Components)

[0142]

[0143]

[0144] (Note 1) Polyether-modified silicone; ES-5612 (manufactured by Dow Toray Co., Ltd.)

[0145] (Manufacturing method)

[0146] A: Mix components 1 - 5 and make them uniform.

[0147] B: Add 6 - 9 to components 10 and 11 and disperse using a roller.

[0148] C: Mix B and components 12 - 17 and make them uniform.

[0149] D: Add C to A and emulsify to obtain a water-in-oil type emulsified foundation.

[0150] The water-in-oil type emulsified foundation obtained as described above is excellent in terms of application feel such as good extensibility, no greasiness, and a moist feeling during use (evaluation ○ above). At the same time, the makeup retention property is very good. In addition, the water resistance is high (the contact angle in the water repellency test described later is 105°), and the storage stability is good.

[0151] (Example 14)

[0152] Add 45 g of purified water and 5 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.) to a mayonnaise bottle, and further add 50 g of a powder obtained by surface-treating fine particle titanium dioxide (MT-05: particle size 10 nm, manufactured by Tayca Corporation) with octyltriethoxysilane (5% by mass) and 100 g of glass beads. Disperse using a paint stirrer, separate the beads, and obtain a uniform aqueous dispersion with a powder concentration of 50%.

[0153] (Example 15)

[0154] Add 41 g of purified water, 5 g of sodium lauryl sulfoacetate (NIKKOL LSA-F, manufactured by Nikko Chemicals Co., Ltd.), and 4 g of 1,3-butanediol to a mayonnaise bottle. Further add 50 g of powder obtained by surface-treating fine zinc oxide particles (MZ-500: particle size 25 nm, manufactured by TAYCA Corporation) with octyltriethoxysilane (8% by mass) and 100 g of glass beads. Disperse using a paint stirrer, separate the beads, and obtain a uniform aqueous dispersion with a powder concentration of 50%.

[0155] (Example 16)

[0156] Add 45 g of purified water, 5 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.), and 3 g of 1,2-pentanediol to a mayonnaise bottle. Further add 50 g of pigment-grade titanium dioxide (OTS-2CR-50: particle size 0.25 μm, manufactured by Daito Kasei Kogyo Co., Ltd.) surface-treated with octyltriethoxysilane (2% by mass) and 100 g of glass beads. Disperse using a paint stirrer, separate the beads, and obtain a uniform aqueous dispersion with a powder concentration of 50%.

[0157] (Example 17)

[0158] Add 45 g of purified water, 5 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.), and 3 g of 1,2-pentanediol to a mayonnaise bottle. Further add 50 g of iron oxide red (OTS-2R-516P: particle size 0.5 μm, manufactured by Daito Kasei Kogyo Co., Ltd.) surface-treated with octyltriethoxysilane (2% by mass) and 100 g of glass beads. Disperse using a paint stirrer, separate the beads, and obtain a uniform aqueous dispersion with a powder concentration of 50%.

[0159] (Example 18)

[0160] Add 45 g of purified water, 5 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.), and 3 g of 1,2-pentanediol to a mayonnaise bottle. Further add 50 g of iron oxide yellow (OTS-2YELLOW LL-100P: particle size 0.7 μm, manufactured by Daito Kasei Kogyo Co., Ltd.) surface-treated with octyltriethoxysilane (2% by mass) and 100 g of glass beads. They were dispersed using a paint stirrer, and after separating the beads, a uniform aqueous dispersion with a powder concentration of 50% was obtained.

[0161] (Example 19)

[0162] To a mayonnaise bottle, 45 g of purified water, 5 g of sodium diethylhexyl sulfosuccinate (NIKKOL OTP-100, manufactured by Nikko Chemicals Co., Ltd.), and 3 g of 1,2-pentanediol were added. Further, 50 g of iron oxide black (OTS-2BL-100P, particle size 0.2 μm, manufactured by Daito Kasei Kogyo Co., Ltd.) surface-treated with octyltriethoxysilane (2% by mass) and 100 g of glass beads. They were dispersed using a paint stirrer, and after separating the beads, a uniform aqueous dispersion with a powder concentration of 50% was obtained.

[0163] (Comparative Production Example 13)

[0164] To a mayonnaise bottle, 26 g of purified water, 12 g of PEG-10 polydimethylsiloxane (KF-6043, manufactured by Shin-Etsu Chemical Co., Ltd.), and 12 g of 1,3-butanediol were added. Further, 50 g of fine particle titanium dioxide (MTY-100SAS: particle size 15 nm, manufactured by TAYCA Corporation) surface-treated with hydrogenated polydimethylsiloxane and 100 g of glass beads. They were dispersed using a paint stirrer, and after separating the beads, an aqueous dispersion with a powder concentration of 50% was obtained.

[0165] (Comparative Production Example 14)

[0166] To a mayonnaise bottle, 40 g of purified water and 10 g of 1,3-butanediol were added. Further, 50 g of fine particle titanium dioxide (MT-100SA: particle size 15 nm, manufactured by TAYCA Corporation) surface-treated with silica (hydrophilic) and 100 g of glass beads. They were dispersed using a paint stirrer, and after separating the beads, a uniform aqueous dispersion with a powder concentration of 50% was obtained.

[0167] (Examples 20 - 25, Comparative Examples 15 - 26: Oil-in-water sunscreen)

[0168] The compositions in Tables 3 and 4 were used to obtain the oil-in-water sunscreens of Examples 20 - 25 and Comparative Examples 15 - 26 through the following production method. It should be noted that the units of the values in the table are mass%.

[0169] (Production method)

[0170] 1. Heat A and B to 80°C respectively.

[0171] 2. Add A while stirring B and mix them evenly.

[0172] 3. Cool A+B to below 40℃.

[0173] 4. Add C into A+B and mix them evenly.

[0174] 5. Add D into A+B+C and mix them evenly.

[0175] <Evaluation method: Appearance (dispersion state)>

[0176] The oil-in-water sunscreens obtained in Examples 20 to 25 and Comparative Examples 15 to 26 were visually observed in their dispersion state immediately after production and in their state after storage at 45° C. for 2 weeks. The uniform dispersion was recorded as 0, the powder aggregation was slightly recorded as △, and the powder aggregation was clearly recorded as ×. The results are shown in Tables 3 and 4.

[0177] <Evaluation method: Water repellency>

[0178] The oil-in-water sunscreen obtained in Examples 20 to 25 and Comparative Examples 15 to 26 was applied to artificial leather using an applicator (gap 500 μm) and dried at 40° C. for 30 minutes to obtain a coating film. 5 μl of water was dropped onto the coating film, and the contact angle was measured using an automatic contact angle meter DM-501 manufactured by Kyowa Interface Science Co., Ltd. The results are shown in Tables 3 and 4.

[0179] [Table 3]

[0180]

[0181] [Table 4]

[0182]

[0183] (Note 1): ECHO GUM T (manufactured by CP Kelco US)

[0184] (Note 2): HEC Daicel SE900 (manufactured by Daicel Miraizu Corporation)

[0185] (Note 3): SEPIMAX ZEN (manufactured by SEPPIC)

[0186] (Note 4): Sangelose 90L (manufactured by Daido Chemical Industry Co., Ltd.)

[0187] (Note 5): Laponite-XL21 XR (manufactured by BYK Japan)

[0188] (Note 6): NTC-CARBOMER 381 (manufactured by Guangzhou Tinc silicone technology Co., Ltd.)

[0189] From the results shown in Tables 3 and 4, it can be seen that the cosmetics of the present invention have a good dispersion state and high water repellency (high water resistance) immediately after manufacture and after being stored at 45°C for 2 weeks. In addition, the cosmetics of the examples are excellent in terms of the use feel such as a moist feeling. It should be noted that the moist feeling is ○ in the above evaluation method.

[0190] (Example 26: Gel sunscreen)

[0191]

[0192] (Note 7): Sangelose 90L (manufactured by Daido Kasei Kogyo Co., Ltd.)

[0193] (Note 8): SUNSPHERE NP-30 (manufactured by AGC SI-TECH Co., Ltd.)

[0194] (Manufacturing method)

[0195] A: Mix Components 1 and 2 and make them uniform.

[0196] B: Add Component 3 to A, mix and make it uniform.

[0197] C: Add Component 4 to B, mix and make it uniform.

[0198] D: Uniformly mix Components 5 and 6 and then add them to C, mix and make it uniform to obtain a gel sunscreen.

[0199] The gel sunscreen obtained as described above has good extensibility, gives a moist and refreshing use feeling, has good makeup retention, has high water resistance, no powder aggregation / sedimentation caused by time, and excellent stability.

[0200] (Example 27: Gel sunscreen)

[0201]

[0202] (Note 9): Sangelose 90L (manufactured by Daido Kasei Kogyo Co., Ltd.)

[0203] (Note 10): SUNSPHERE NP-30 (manufactured by AGC SI-TECH Co., Ltd.)

[0204] (Manufacturing method)

[0205] A gel sunscreen is obtained using the same manufacturing method as in Example 26.

[0206] The gel-like sunscreen obtained as described above has good extensibility, provides a moist and refreshing feeling during use, has good makeup retention, has high water resistance, has no powder aggregation / sedimentation caused by time, and has excellent stability.

[0207] (Example 28: Gel-like sunscreen)

[0208]

[0209] (Note 11): SEPIMAX ZEN (manufactured by SEPPIC)

[0210] (Manufacturing method)

[0211] Mix all the ingredients and make them uniform.

[0212] The gel-like sunscreen obtained as described above has good extensibility, provides a moist and refreshing feeling during use, has good makeup retention, has high water resistance, has no powder aggregation / sedimentation caused by time, and has excellent stability.

[0213] (Example 29: Oil-in-water primer)

[0214]

[0215] (Note 12) SEPIMAX ZEN (manufactured by SEPPIC)

[0216] (Manufacturing method)

[0217] A: Heat ingredients 1 to 5 to 80°C, mix and make them uniform.

[0218] B: Heat ingredients 6 and 7 to 80°C, mix and make them uniform.

[0219] C: While stirring B, add A to B, mix and make them uniform.

[0220] D: Add ingredient 8 to C, mix and make them uniform.

[0221] E: Add ingredients 9 to 12 to D, mix and make them uniform to obtain an oil-in-water primer.

[0222] The oil-in-water primer obtained as described above has a delicate texture and good extensibility, has no sticky or greasy feeling, has a moist feeling, provides a moist and refreshing feeling during use, has very good makeup retention, has high water resistance, has no powder aggregation / sedimentation caused by time, and has excellent stability.

[0223] This application is based on Japanese Patent Application No. 2022-182769 filed on November 15, 2022, and Japanese Patent Application No. 2023-149732 filed on September 15, 2023, and incorporates their entire disclosures by reference.

Claims

1. An aqueous dispersion of an inorganic powder subjected to surface hydrophobization treatment, which contains the following components (A), (B) and (C) as essential components, (A) An inorganic powder subjected to surface hydrophobization treatment, (B) Dialkyl sulfosuccinate and / or alkyl sulfoacetate, (C) Water.

2. The aqueous dispersion of an inorganic powder subjected to surface hydrophobization treatment according to claim 1, wherein Component (A) is an inorganic powder surface-hydrophobized with at least one compound selected from the group consisting of silicone oil, alkoxysilane, and fatty acid.

3. A cosmetic product, which contains the aqueous dispersion of an inorganic powder subjected to surface hydrophobization treatment according to claim 1 or claim 2.

4. The cosmetic product according to claim 3, which further contains component (D) a water-soluble polymer and / or an inorganic thickener.

5. The cosmetic product according to claim 4, wherein The content of the component (D) is 0.02% by mass to 2% by mass.

6. A method for manufacturing a cosmetic product, which has a step of mixing the aqueous dispersion of an inorganic powder subjected to surface hydrophobization treatment according to claim 1 or claim 2 with cosmetic ingredients.

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