Powder material for cosmetic and method for producing the same, and cosmetic

Abstract

A powder material for a cosmetic, comprising a powder for a cosmetic, which is surface-treated with a surface treatment agent, the surface treatment agent containing component (a): a mannosylerythritol lipid represented by the following formula (1), and component (b): an ester compound of glycerin and a fatty acid having a carbon number of 8 to 20, the content of the component (a) being 0.5 to 3 mass%, and the content of the component (b) being 0.1 to 10 mass%.

Description

Technical Field

[0001] The present invention relates to a cosmetic powder material comprising a cosmetic powder having been surface-treated with a surface treatment agent, a method for manufacturing the cosmetic powder material, and a cosmetic containing the cosmetic powder material. Background Technology

[0002] In cosmetics, various cosmetic powders, such as inorganic powders and organic powders, are combined. Cosmetic powder materials have been proposed in which the surface of these cosmetic powders has been surface-treated (coated) with various surface treatment agents according to the purpose of the combination.

[0003] For example, a cosmetic powder material has been proposed that is coated with glycerol and an ester compound of a fatty acid having 8 to 20 carbon atoms (see Patent Document 1). This cosmetic powder material is said to possess high water resistance and exhibit good dispersibility in hydrocarbon-based oils, ester-based oils, and siloxane-based oils.

[0004] On the other hand, for example, to improve the texture of pigments, a cosmetic powder material has been proposed that uses a surface treatment agent containing mannoerythritol ester, which is derived from olive oil and other glycolipids, to coat the surface of hydrophobic powders such as cosmetic pigments (see Patent Documents 2 and 3). It is claimed that water-in-oil foundations formulated with these cosmetic powder materials have excellent skin barrier function and water retention properties, providing the skin with a moisturizing feel and hydration.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: International Publication No. 2022 / 030462

[0008] Patent Document 2: International Publication No. 2011 / 040357

[0009] Patent Document 3: Japanese Patent Application Publication No. 2017-81907 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] However, the cosmetic powder material in Patent Document 1, which uses an ester compound of glycerol and a fatty acid with 8 to 20 carbon atoms for surface treatment, may have poor water resistance and oil dispersibility. Furthermore, the cosmetic powder materials in Patent Documents 2 and 3, which use mannose erythritol ester for surface treatment, may have poor emulsification stability.

[0012] The present invention was made in view of the above circumstances, and its object is to provide a cosmetic powder material with excellent water resistance, dispersibility in oils, and emulsification stability, a method for manufacturing the cosmetic powder material, and a cosmetic containing the cosmetic powder material.

[0013] Methods for solving problems

[0014] The cosmetic powder material of the present invention, which is used to solve the above-mentioned problems, is characterized in that...

[0015] A cosmetic powder material comprising cosmetic powder that has been surface-treated with a surface-treatment agent.

[0016] The above surface treatment agent contains:

[0017] Component (a): mannose erythritol ester as shown in formula (1) below, and

[0018] Component (b): An ester compound of glycerol and fatty acids with 8 to 20 carbon atoms.

[0019] The content of the above component (a) is 0.5% to 3% by mass.

[0020] The content of the above component (b) is 0.1 to 10% by mass.

[0021] [Chemistry 1]

[0022]

[0023] (In the above formula (1), R) 1 and R 2 Each independently represents an aliphatic acyl group having 6 to 20 carbon atoms, R 3 and R 4 Each atom can be independently represented by a hydrogen atom or an acetyl group, where n represents an integer from 2 to 4.

[0024] According to the cosmetic powder material of this composition, the cosmetic powder is surface-treated using a surface treatment agent containing components (a) and (b), and the contents of components (a) and (b) are within the aforementioned appropriate range, thereby exhibiting excellent water resistance, dispersibility in oils, and emulsion stability. Furthermore, by setting the contents of components (a) and (b) within the aforementioned appropriate range, components (a) and (b) coat the surface of the cosmetic powder, giving the cosmetic powder material the overall properties of a powder. As a result, the obtained cosmetic powder can further improve water resistance, dispersibility in oils, and emulsion stability. In addition, a moisturizing feel can be achieved.

[0025] In the cosmetic powder material of the present invention

[0026] Preferably, the above-mentioned component (b) is selected from at least one of tetraisostearate diglyceride, triisostearate diglyceride, tri(caprylic / capric) glyceride, dilaurate glyceride, triisostearate glyceride, monoisostearate decaglyceride, and diisostearate decaglyceride.

[0027] By selecting the appropriate compounds mentioned above as component (b) in the cosmetic powder material according to this composition, the water resistance, dispersibility in oils, and emulsion stability can be further improved.

[0028] In the cosmetic powder material of the present invention

[0029] The above-mentioned R is preferred 1 and R 2 Each is an aliphatic acyl group with 10 to 14 carbon atoms.

[0030] According to the cosmetic powder material of this composition, by selecting the appropriate aliphatic acyl group as R... 1 and R 2 It can moderately improve hydrophobicity, thus further improving the water resistance, dispersibility in oils, and emulsification stability of cosmetic powder materials.

[0031] In the cosmetic powder material of the present invention

[0032] Preferably, the powder used in the cosmetics is selected from at least one of titanium dioxide, iron oxide yellow, iron oxide red, iron oxide black, talc, zinc oxide, silicon dioxide, pearlescent mica, mica, and sericite.

[0033] By selecting the appropriate powder as the cosmetic powder according to this composition, the water resistance, dispersibility in oils, and emulsification stability can be further improved.

[0034] Another method for manufacturing a cosmetic powder material according to the present invention for solving the above-mentioned problems is characterized by comprising:

[0035] In the mixing process, the mixture is mixed with cosmetic powder. The mixture is obtained by dispersing, suspending or dissolving component (a): mannose erythritol ester as shown in formula (1) below and component (b): glycerol and fatty acid ester compound with carbon number 8 to 20 in a solvent.

[0036] The heat treatment process involves heat-treating the mixture obtained in the above mixing process.

[0037] [Chemistry 2]

[0038]

[0039] (In the above formula (1), R) 1 and R 2 Each independently represents an aliphatic acyl group having 6 to 20 carbon atoms, R 3 and R 4 Each atom can be independently represented by a hydrogen atom or an acetyl group, where n represents an integer from 2 to 4.

[0040] According to the manufacturing method of the cosmetic powder material of this composition, by performing the above-described mixing process and the above-described heat treatment process, a cosmetic powder material with excellent water resistance, dispersibility in oil, and emulsification stability can be obtained.

[0041] In the method for manufacturing powder material for cosmetics of the present invention

[0042] In the above mixing process, it is preferable that the ratio of the solvent contained in the above mixture to the component (a) is adjusted to 10:1 or more by mass.

[0043] According to the manufacturing method of the cosmetic powder material of this composition, by adjusting the ratio of the solvent contained in the mixture to component (a) to the appropriate range described above, the dispersibility of component (a) in the solvent can be improved.

[0044] In the method for manufacturing powder material for cosmetics of the present invention

[0045] Preferably, in the above heat treatment process, the mixture is heat-treated at 70 to 150°C.

[0046] According to the manufacturing method of the cosmetic powder material of this composition, by heat-treating the mixture at an appropriate temperature, the hydrophilic groups of the ester compound of fatty acids with carbon numbers of 8 to 20 and glycerol (as component (b)) are oriented towards the cosmetic powder surface, thereby obtaining a cosmetic powder material with excellent water resistance. Furthermore, components (a) and (b) can be well adhered to the cosmetic powder.

[0047] In the method for manufacturing powder material for cosmetics of the present invention

[0048] Preferably, the solvent is an organic solvent and / or water.

[0049] According to the manufacturing method of the cosmetic powder material of this composition, by using organic solvent and / or water as solvent, no impurities remain in the cosmetic powder material after the heat treatment process, and a product with high purity can be obtained.

[0050] Another feature of the cosmetic material of the present invention for solving the above-mentioned problems is that...

[0051] It contains the powder material used in the above-mentioned cosmetics.

[0052] The cosmetic material of this composition has excellent water resistance, dispersibility in oils, and emulsification stability due to the presence of the aforementioned cosmetic powder material. Attached Figure Description

[0053] Figure 1 It is a graph representing the results of the oil dispersibility evaluation test. Detailed Implementation

[0054] The following describes in detail the cosmetic powder material, the method for manufacturing the cosmetic powder material, and the cosmetic containing the cosmetic powder material of the present invention. However, it is not intended to limit the present invention to the embodiments and examples described below.

[0055] [Powder material for cosmetics]

[0056] The cosmetic powder material of the present invention comprises cosmetic powder that has been surface-treated with a surface-treatment agent. The surface-treatment agent contains components (a) and (b) described below.

[0057] <Ingredient (a): Mannose erythritol ester>

[0058] Component (a) is mannose erythritol ester (hereinafter also referred to as "MEL") as shown in formula (1). MEL is a general term for glycolipids formed from mannose, sugar alcohol, and fatty acids. Specifically, it is a glycolipid formed by the dehydration condensation of the 1-position hydroxyl group of mannose with the sugar alcohol through a glycosidic bond, and the dehydration condensation of the 2-position and 3-position hydroxyl groups of mannose with the fatty acid through an ester bond. In the MEL of the present invention, the hydrogen atoms of the 4-position and 6-position hydroxyl groups of mannose are not substituted (R 3 and R 4 (either a hydrogen atom or at least one of them is replaced by an acetyl group (R) 3 and R 4 At least one of them is an acetyl group.

[0059] [Chemistry 3]

[0060]

[0061] In the above formula (1), R 1 and R 2 Each independently represents an aliphatic acyl group having 6 to 20 carbon atoms, R 3 and R 4 Each can be represented independently as a hydrogen atom or an acetyl group, where n represents an integer from 2 to 4.

[0062] The MEL shown in formula (1) above depends on whether there is a substituent R on the mannose residue. 3and R 4 The addition of an acetyl group (Ac), the type of sugar alcohol that forms a glycosidic bond with mannose, and the different isomers of that sugar alcohol can result in MELs with various structural formulas.

[0063] For example, preferred R 1 and R 2 Each is an aliphatic acyl group with 10 to 14 carbon atoms. By selecting appropriate aliphatic acyl groups as R... 1 and R 2 It can moderately improve hydrophobicity, thus further improving the water resistance, dispersibility in oils, and emulsification stability of cosmetic powder materials.

[0064] For example, as R 3 and R 4 The form can be exemplified by R. 3 and R 4 The form of the acetyl group (see MEL-A described later), R 3 It is a hydrogen atom and R 4 The form of acetyl (refer to MEL-B and trans-MEL-B described later), R 3 It is an acetyl group and R 4 The form of hydrogen atoms (refer to MEL-C described later), R 3 and R 4 It is in the form of hydrogen atoms (see MEL-D and inverse MEL-D described later). Regardless of which form is chosen, the water resistance, dispersibility in oils, and emulsion stability of cosmetic powder materials can be improved in the same way.

[0065] n is preferably an integer from 2 to 3, and more preferably 2. By selecting an appropriate integer as n, the hydrophilicity can be moderately reduced, thereby further improving the water resistance, dispersibility in oils, and emulsion stability of the cosmetic powder material.

[0066] Specifically, as MELs, examples include MEL-A having the structure shown in equation (2), MEL-B having the structure shown in equation (3) or equation (4), MEL-C having the structure shown in equation (5), and MEL-D having the structure shown in equation (6) or equation (7). MEL-B shown in equations (3) and (4) are optical isomers of each other. MEL-B having the structure shown in equation (4) as its optical isomer is called inverse MEL-B, relative to MEL-B having the structure shown in equation (3). MEL-D shown in equations (6) and (7) are optical isomers of each other. MEL-D having the structure shown in equation (7) as its optical isomer is called inverse MEL-D, relative to MEL-D having the structure shown in equation (6).

[0067] Among them, MELs with the structure shown in formula (2) produced by the microorganism *Pseudozyma antarctica* and MEL-B (reverse type) with the structure shown in formula (4) produced by the microorganism *Pseudozyma tsukubaensis* are preferred. By selecting MELs with the appropriate structures described above, the water resistance, dispersibility in oils, and emulsification stability of cosmetic powder materials can be further improved. One type of MEL can be used alone, or two or more can be used in combination.

[0068] It should be noted that the structures shown in formulas (2), (3), (5), and (6) below are 4-O-β-D-pyranomannosyl-(2S,3R)-erythritol structures. On the other hand, the term "inverse" used for the structures shown in formulas (4) and (7) below is used to distinguish them from MELs that have optical isomers. In this specification, the term is used to refer to compounds having the 4-O-β-D-pyranomannosyl-meta-(2R,3S)-erythritol structure as shown in formulas (4) and (7) below.

[0069] (MEL-A)

[0070] [Chemistry 4]

[0071]

[0072] (MEL-B)

[0073] [Chemistry 5]

[0074]

[0075] (Reversible Transformation MEL-B)

[0076] [Chemistry 6]

[0077]

[0078] (MEL-C)

[0079] [Chemistry 7]

[0080]

[0081] (MEL-D)

[0082] [Chemistry 8]

[0083]

[0084] (Reversible MEL-D)

[0085] [Chemistry 9]

[0086]

[0087] In equations (2) to (7) above, R 1 and R 2 Each group independently represents an aliphatic acyl group with 6 to 20 carbon atoms. Similarly, R is preferred. 1 and R 2 Each is an aliphatic acyl group with 10 to 14 carbon atoms.

[0088] The content of component (a) in the cosmetic powder material is 0.5 to 3% by mass. By setting the content of component (a) to the above-mentioned appropriate range, the water resistance, dispersibility in oils, and emulsion stability of the cosmetic powder material can be further improved.

[0089] <Component (b): Ester compounds of glycerol and fatty acids with 8 to 20 carbon atoms>

[0090] The ester compound of glycerol and fatty acids having 8 to 20 carbon atoms, which is component (b), can form a coating when the cosmetic powder is surface-treated together with component (a).

[0091] As component (b), preferred compounds include tetraisostearate, triisostearate, tri(caprylic / capric)glycerides, dilaurate, triisostearate, monoisostearate, and diisostearate. By selecting appropriate compounds as component (b), water resistance, dispersibility in oils, and emulsion stability can be further improved. Component (b) can be used alone or in combination with two or more.

[0092] The content of component (b) in the cosmetic powder material is 0.1 to 10% by mass. By setting the content of component (b) within the aforementioned appropriate range, the water resistance, dispersibility in oils, and emulsion stability of the cosmetic powder material can be further improved. Furthermore, by setting the content of component (a) in the cosmetic powder material to 0.5 to 3% by mass and setting the content of component (b) within the aforementioned appropriate range (0.1 to 10% by mass), components (a) and (b) coat the surface of the cosmetic powder, giving the cosmetic powder material the overall properties of a powder. As a result, the obtained cosmetic powder can further improve water resistance, dispersibility in oils, and emulsion stability. In addition, a moisturizing feel can be achieved.

[0093] <Cosmetic Powders>

[0094] Cosmetic powders are powders that have undergone surface treatment (coating) using surface treatment agents, and in this respect, they serve as the base material for cosmetic powder materials. As cosmetic powders, powders conventionally used in cosmetics can be used; furthermore, various powders can be used regardless of their shape, particle size, or particle structure. Examples of cosmetic powders include, for instance, inorganic powders, organic powders, surfactant metal salt powders, colored pigments, pearlescent pigments, and metallic powder pigments.

[0095] Examples of inorganic powders include titanium dioxide, zirconium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, talc, mica, kaolin, sericite, muscovite, synthetic mica, phlogopite, red mica, biotite, lepidolite, silicic acid, silicic anhydride, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, tungstate metal salts, hydroxyapatite, vermiculite, Higilite, bentonite, montmorillonite, lithium montmorillonite, zeolite, ceramic powder, dicalcium phosphate, alumina, aluminum hydroxide, boron nitride, boron nitrides, and silicon dioxide.

[0096] Examples of organic powders include polyamide powder, polyester powder, polyethylene powder, polypropylene powder, polystyrene powder, polyurethane powder, guanidineamine powder, polymethyl guanidineamine powder, polytetrafluoroethylene powder, polymethyl methacrylate powder, cellulose, silk powder, nylon powder, 12 nylon, 6 nylon, acrylic powder, acrylic elastomers, styrene-acrylic acid copolymer, divinylbenzene-styrene copolymer, vinyl resin, urea-formaldehyde resin, phenolic resin, fluororesin, silicone resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, microcrystalline fiber powder, starch powder, lauroyl lysine, etc.

[0097] Examples of metal salt powders (metal soaps) that can be used as surfactants include zinc stearate, aluminum stearate, calcium stearate, magnesium stearate, zinc myristate, magnesium myristate, zinc cetyl phosphate, calcium cetyl phosphate, and sodium cetyl phosphate.

[0098] Examples of colored pigments include inorganic red pigments such as iron oxide red (red iron oxide), iron hydroxide, and iron titanate; inorganic brown pigments such as γ-iron oxide; inorganic yellow pigments such as iron oxide yellow (yellow iron oxide) and loess; inorganic black pigments such as iron oxide black (black iron oxide) and carbon black; inorganic purple pigments such as manganese violet and cobalt violet; inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide, and cobalt titanate; inorganic blue pigments such as Prussian blue and ultramarine; microparticle powders such as microparticle titanium oxide, microparticle cerium oxide, and microparticle zinc oxide; pigments obtained by lake-forming tar-based pigments (lake-formed tar-based pigments); pigments obtained by lake-forming natural pigments (lake-formed natural pigments); and synthetic resin powders obtained by combining these powders.

[0099] Examples of pearlescent pigments include pearlescent mica coated with titanium dioxide, bismuth oxychloride, titanium dioxide coated with bismuth oxychloride, titanium dioxide coated with talc, fish scale foil, and titanium dioxide coated with colored mica.

[0100] Examples of metallic powder pigments include aluminum powder, copper powder, and stainless steel powder.

[0101] Among these, the preferred powders for cosmetics are titanium dioxide, iron oxide yellow, iron oxide red, iron oxide black, talc, zinc oxide, silicon dioxide, pearlescent mica, mica, and sericite. By selecting appropriate powders as cosmetic powders, water resistance, dispersibility in oils, and emulsification stability can be further improved. One type of cosmetic powder can be used alone, or two or more can be used in combination.

[0102] <Other Ingredients>

[0103] The cosmetic powder material of the present invention may also include other components besides cosmetic powder, component (a), and component (b). Examples of other components include antibacterial agents, antiviral agents, bactericides, deodorants, antioxidants, stabilizers, pH adjusters, etc.

[0104] <Method for Manufacturing Powder Materials for Cosmetics>

[0105] The cosmetic powder material of the present invention can be manufactured by performing the following mixing and heat treatment processes.

[0106] (Mixed process)

[0107] In the mixing process, a mixture containing components (a) and (b) dispersed, suspended, or dissolved in a solvent is mixed with cosmetic powder.

[0108] The solvent used in the mixing process is not particularly limited as long as it can disperse, suspend, or dissolve components (a) and (b), and is preferably an organic solvent and / or water. By using organic solvents and / or water as solvents, no impurities remain in the cosmetic powder material after the heat treatment process, and a product with high purity can be obtained.

[0109] Examples of organic solvents include alcohol-based organic solvents 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.

[0110] In the mixing process, it is preferable to adjust the ratio of solvent to component (a) in the mixture to be 10:1 or more by mass (the mass of the solvent is 10 times or more relative to the mass of component (a)). Specifically, for example, when water is used as the solvent, it is preferable to adjust the ratio of solvent to component (a) to be 15:1 or more by mass (the mass of the solvent is 15 times or more relative to the mass of component (a)). When an organic solvent is used as the solvent, it is preferable to adjust the ratio of solvent to component (a) to be 10:1 or more by mass (the mass of the solvent is 10 times or more relative to the mass of component (a)). By adjusting the ratio of solvent to component (a) in the mixture to the above-mentioned appropriate range, the dispersibility of component (a) in the solvent can be improved.

[0111] In the mixing process, when water is used as the solvent, it is preferable to disperse, suspend, or dissolve components (a) and (b) in water at 50–60°C. When an organic solvent is used as the solvent, it is preferable to disperse, suspend, or dissolve components (a) and (b) in the organic solvent at 40–60°C. By setting the mixing temperature to the appropriate range described above according to the type of solvent used, components (a) and (b) can be more uniformly dispersed, suspended, or dissolved in each solvent.

[0112] When mixing the liquid with cosmetic powder, an appropriate mixing device can be used depending on the concentration (amount added), viscosity, etc. of the solvent used. Examples of suitable mixing devices include dispersers, Henschel mixers, Loedige mixers, kneaders, V-type mixers, roller mills, bead mills, and twin-screw extruders. When using such a mixer, it is preferable to slowly add the liquid to the cosmetic powder while stirring. By mixing in this way, the liquid can be more evenly adhered to the surface of the cosmetic powder.

[0113] (Heat treatment process)

[0114] In the heat treatment process, the mixture obtained in the mixing process is heat-treated. By performing this heat treatment process, a cosmetic powder material in which the surface of the powder is surface-treated (coated) using a surface treatment agent containing component (a) and component (b) can be obtained.

[0115] In the heat treatment process, it is preferable to heat treat the above mixture at 70 to 150°C. By heat treating the mixture at the above-mentioned appropriate temperature, the hydrophilic groups of the ester compounds of fatty acids with carbon numbers of 8 to 20 and glycerol as component (b) are oriented toward the cosmetic powder side on the surface of the cosmetic powder, thereby obtaining a cosmetic powder material with excellent water resistance.

[0116] When heat-treating mixtures, electric furnaces, box furnaces, kilns, infrared heaters, etc., can be used. Heat treatment is usually carried out in the presence of air; however, when the mixture contains materials that are easily oxidized, it is preferable to carry it out under a vacuum or inert gas atmosphere.

[0117] After heat treatment, pulverization is preferred. When pulverizing after heat treatment, common pulverizers such as hammer mills, ball mills, sand mills, and jet mills can be used. Since the same quality of material can be obtained regardless of the type of pulverizer used, there are no particular limitations on the type of pulverizer employed.

[0118] <Cosmetic Materials>

[0119] The cosmetic material of the present invention contains the aforementioned cosmetic powder material. The amount of cosmetic powder material in the cosmetic material is not particularly limited, but is preferably, for example, 0.1% to 95% by mass. By setting the amount of cosmetic powder material within the appropriate range described above, the aforementioned effects of the cosmetic powder material can be fully realized.

[0120] The cosmetic material of the present invention can be either an oil-in-water (O / W) emulsion or an oil-in-water (W / O) emulsion, but is more suitable as an oil-in-water (W / O) emulsion.

[0121] In the cosmetics of the present invention, ingredients commonly used in cosmetics may be incorporated within a range that does not impair the effects of the present invention, such as powders other than powder materials for cosmetics, surfactants, oils, gelling agents, polymers, beauty ingredients, moisturizers, pigments, preservatives, fragrances, etc.

[0122] Example

[0123] The powder materials for cosmetics of the present invention (Examples 1-14) were prepared, and oil dispersibility evaluation tests, water resistance (water tolerance) tests, and emulsion stability evaluations were performed. In addition, for comparison, powder materials for cosmetics outside the scope of the present invention (Comparative Examples 1-12) were prepared, and the same tests and evaluations were performed.

[0124] [Example 1]

[0125] Add 1.0 g of mannose erythritol ester (MEL-A, R) as a surface treatment agent to 12.5 g of isopropanol at 40 °C. 1 and R 2 Aliphatic acyl groups with 10-14 carbon atoms, R 3 and R 4 A mixture was prepared by dispersing 0.5 g of acetyl diglyceride (DG4ISA) and tetraisostearate diglyceride. Then, while stirring 98.5 g of titanium dioxide (as a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dried powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 1. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 1 was 1.5% by mass.

[0126] [Example 2]

[0127] A mixture was prepared by adding 1.5 g of MEL-A and 0.5 g of DG4ISA as surface treatment agents to 25.0 g of isopropanol at 40°C and dispersing the mixture. Then, while stirring 98.0 g of iron oxide yellow (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 2. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 2 was 2.0% by mass.

[0128] [Example 3]

[0129] A mixture was prepared by adding 1.0 g of MEL-A and 0.5 g of DG4ISA as surface treatment agents to 25.0 g of isopropanol at 40°C and dispersing the mixture. Then, while stirring 98.5 g of iron oxide red (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 3. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 3 was 1.5% by mass.

[0130] [Example 4]

[0131] A mixture was prepared by adding 1.0 g of MEL-A and 0.5 g of DG4ISA as surface treatment agents to 12.5 g of isopropanol at 40°C and dispersing the mixture. Then, while stirring 98.5 g of iron oxide black (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 4. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 4 was 1.5% by mass.

[0132] [Example 5]

[0133] A mixture was prepared by adding 0.5 g of MEL-A and 0.1 g of DG4ISA as surface treatment agents to 12.5 g of isopropanol at 40°C and dispersing the mixture. Then, while stirring 99.4 g of titanium dioxide (as a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 5. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 5 was 0.6% by mass.

[0134] [Example 6]

[0135] A mixture was prepared by adding 3.0 g of MEL-A and 10.0 g of DG4ISA as surface treatment agents to 12.5 g of isopropanol at 40°C and dispersing the mixture. Then, while stirring 87.0 g of titanium dioxide (as a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 6. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 6 was 13.0% by mass.

[0136] [Example 7]

[0137] A mixture was prepared by adding 1.0 g of MEL-A and 0.5 g of DG4ISA as surface treatment agents to 15.0 g of water at 50°C and dispersing them. Then, while stirring 98.5 g of titanium dioxide (as a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 7. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 7 was 1.5% by mass.

[0138] [Example 8]

[0139] A mixture was prepared by adding 1.5 g of MEL-A and 0.5 g of DG4ISA as surface treatment agents to 25.0 g of water at 50°C and dispersing them. Then, while stirring 98.0 g of iron oxide yellow (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dried powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 8. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 8 was 2.0% by mass.

[0140] [Example 9]

[0141] A mixture was prepared by adding 1.0 g of MEL-A and 0.5 g of DG4ISA as surface treatment agents to 15.0 g of water at 50°C and dispersing them. Then, while stirring 98.5 g of iron oxide red (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 9. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 9 was 1.5% by mass.

[0142] [Example 10]

[0143] A mixture was prepared by adding 1.0 g of MEL-A and 0.5 g of DG4ISA as surface treatment agents to 15.0 g of water at 50°C and dispersing them. Then, while stirring 98.5 g of iron oxide black (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dried powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 10. The total content of MEL-A and DG4ISA in the cosmetic powder material of Example 10 was 1.5% by mass.

[0144] [Example 11]

[0145] Add 1.0g of the reaction agent MEL-B (R) to 15.0g of water at 50℃ as a surface treatment agent. 1 and R 2 Aliphatic acyl groups with 10-14 carbon atoms, R 3 Hydrogen atom, R 4 A mixture was prepared by dispersing 0.5 g of acetyl group and DG4ISA. Then, while stirring 98.5 g of titanium dioxide (as a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 11. The total content of the reverse-transfer MEL-B and DG4ISA in the cosmetic powder material of Example 11 was 1.5% by mass.

[0146] [Example 12]

[0147] A mixture was prepared by adding 1.5 g of reverse-transformer MEL-B and 0.5 g of DG4ISA as surface treatment agents to 15.0 g of water at 50°C and dispersing them. Then, while stirring 98.0 g of iron oxide yellow (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dried powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 12. The total content of reverse-transformer MEL-B and DG4ISA in the cosmetic powder material of Example 12 was 2.0% by mass.

[0148] [Example 13]

[0149] A mixture was prepared by adding 1.0 g of reverse-transformer MEL-B and 0.5 g of DG4ISA as surface treatment agents to 15.0 g of water at 50°C and dispersing them. Then, while stirring 98.5 g of iron oxide red (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 13. The total content of reverse-transformer MEL-B and DG4ISA in the cosmetic powder material of Example 13 was 1.5% by mass.

[0150] [Example 14]

[0151] A mixture was prepared by adding 1.0 g of reverse-transformer MEL-B and 0.5 g of DG4ISA as surface treatment agents to 15.0 g of water at 50°C and dispersing them. Then, while stirring 98.5 g of iron oxide black (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Example 14. The total content of reverse-transformer MEL-B and DG4ISA in the cosmetic powder material of Example 14 was 1.5% by mass.

[0152] [Comparative Example 1]

[0153] 1.0 g of MEL-A was used as a surface treatment agent, and 99.0 g of titanium dioxide was used as a cosmetic powder. Otherwise, the cosmetic powder material of Comparative Example 1 was obtained in the same manner as in Example 1. The content of MEL-A in the cosmetic powder material of Comparative Example 1 was 1.0% by mass.

[0154] [Comparative Example 2]

[0155] 2.0 g of MEL-A was used as a surface treatment agent, and 98.0 g of iron oxide yellow was used as a cosmetic powder. Otherwise, the cosmetic powder material of Comparative Example 2 was obtained in the same manner as in Example 2. The content of MEL-A in the cosmetic powder material of Comparative Example 2 was 2.0% by mass.

[0156] [Comparative Example 3]

[0157] 1.0 g of MEL-A was used as a surface treatment agent, and 99.0 g of iron oxide red was used as a cosmetic powder. Otherwise, the cosmetic powder material of Comparative Example 3 was obtained in the same manner as in Example 3. The content of MEL-A in the cosmetic powder material of Comparative Example 3 was 1.0% by mass.

[0158] [Comparative Example 4]

[0159] 1.0 g of MEL-A was used as a surface treatment agent, and 99.0 g of iron oxide black was used as a cosmetic powder. Otherwise, the cosmetic powder material of Comparative Example 4 was obtained in the same manner as in Example 4. The content of MEL-A in the cosmetic powder material of Comparative Example 4 was 1.0% by mass.

[0160] [Comparative Example 5]

[0161] 2.0 g of DG4ISA was used as a surface treatment agent, and 98.0 g of titanium dioxide was used as a cosmetic powder. Otherwise, the cosmetic powder material of Comparative Example 5 was obtained in the same manner as in Example 1. The DG4ISA content of the cosmetic powder material of Comparative Example 5 was 2.0% by mass.

[0162] [Comparative Example 6]

[0163] 2.0 g of DG4ISA was used as a surface treatment agent, and 98.0 g of iron oxide yellow was used as a cosmetic powder. Otherwise, the cosmetic powder material of Comparative Example 6 was obtained in the same manner as in Example 2. The DG4ISA content of the cosmetic powder material of Comparative Example 6 was 2.0% by mass.

[0164] [Comparative Example 7]

[0165] 2.0 g of DG4ISA was used as a surface treatment agent, and 98.0 g of iron oxide red was used as a cosmetic powder. Otherwise, the cosmetic powder material of Comparative Example 7 was obtained in the same manner as in Example 3. The DG4ISA content of the cosmetic powder material of Comparative Example 7 was 2.0% by mass.

[0166] [Comparative Example 8]

[0167] 2.0 g of DG4ISA was used as a surface treatment agent, and 98.0 g of iron oxide black was used as a cosmetic powder. Otherwise, the cosmetic powder material of Comparative Example 8 was obtained in the same manner as in Example 4. The DG4ISA content of the cosmetic powder material of Comparative Example 8 was 2.0% by mass.

[0168] [Comparative Example 9]

[0169] Titanium oxide powder was used as a cosmetic powder. This titanium oxide powder was used directly as the cosmetic powder material of Comparative Example 9 without surface treatment.

[0170] [Comparative Example 10]

[0171] A mixture was prepared by adding 0.3 g of MEL-A and 0.1 g of DG4ISA as surface treatment agents to 12.5 g of isopropanol at 40°C and dispersing the mixture. Then, while stirring 99.6 g of titanium dioxide (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Comparative Example 10. The total content of MEL-A and DG4ISA in the cosmetic powder material of Comparative Example 10 was 0.4% by mass.

[0172] [Comparative Example 11]

[0173] A mixture was prepared by adding 4.0 g of MEL-A and 10.0 g of DG4ISA as surface treatment agents to 12.5 g of isopropanol at 40°C and dispersing the mixture. Then, while stirring 86.0 g of titanium dioxide (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Comparative Example 11. The total content of MEL-A and DG4ISA in the cosmetic powder material of Comparative Example 11 was 14.0% by mass.

[0174] [Comparative Example 12]

[0175] A mixture was prepared by adding 3.0 g of MEL-A and 11.0 g of DG4ISA as surface treatment agents to 12.5 g of isopropanol at 40°C and dispersing the mixture. Then, while stirring 86.0 g of titanium dioxide (a cosmetic powder) with a stirrer, the mixture was added dropwise and mixed for 20 minutes to prepare a final mixture. This mixture was then heat-treated at 110°C for 6 hours, and the resulting dry powder was pulverized using a hammer mill to obtain the cosmetic powder material of Comparative Example 12. The total content of MEL-A and DG4ISA in the cosmetic powder material of Comparative Example 12 was 14.0% by mass.

[0176] [Water resistance test]

[0177] As a water resistance test, the contact angles of the cosmetic powder materials of Examples 1-4, Examples 7-14, and Comparative Examples 1-9 were measured as follows. First, an appropriate amount of cosmetic powder material was filled into a mold and compressed into a tablet at a pressure of 10 MPa to produce a tablet for contact angle measurement. The prepared tablet was placed in a contact angle measuring device (contact angle measuring instrument LSE-B100, manufactured by NIC Co., Ltd.), and water droplets were added to the tablet using a syringe. The contact angle (°) formed between the water droplet and the tablet was measured. The results are shown in Table 1.

[0178]

[0179] As shown in Table 1, in the untreated cosmetic powder material of Comparative Example 9, water droplets penetrated the cosmetic powder material, but no water droplets were present on its surface, thus no contact angle was generated. Comparing the cosmetic powder materials of Comparative Examples 1-4 with those of Comparative Examples 1-4, the cosmetic powder materials of Examples 1-4 showed a trend towards superior water resistance. Furthermore, comparing the cosmetic powder materials of Comparative Examples 11-14 with those of Comparative Examples 1-8, the cosmetic powder materials of Examples 11-14 showed a trend towards superior water resistance. Therefore, it can be said that by surface treatment after compounding MEL (component (a)) and DG4ISA (component (b)), the cosmetic powder material of the present invention can achieve higher water resistance compared to cosmetic powder materials that only coat either MEL or DG4ISA. In addition, the cosmetic powder materials of Examples 7-10 (and Examples 11-14 as described above) also showed superior water resistance compared to the cosmetic powder materials of Comparative Examples 1-4. Based on this result, it can be said that high water resistance can be obtained even when water is used instead of organic solvents in the preparation of the mixture.

[0180] [Evaluation Test of Oil Dispersibility]

[0181] It is known that the greater the dispersibility of cosmetic powder materials in oil, the lower the viscosity of the dispersion obtained by dispersing cosmetic powder materials in oil. Therefore, as an evaluation test of oil dispersibility, 60g of cosmetic powder materials from Examples 1, 7, and 11, and Comparative Examples 1 and 5, and 40g of oil were mixed with 1000rpm for 10 minutes, and the viscosity of the resulting dispersion was measured using a Type B viscometer. The oil used was triglyceride (octanoic / capric acid) as an ester-based oil, squalane as a hydrocarbon-based oil, and dimethicone as a siloxane-based oil. The results are presented as follows: Figure 1 middle.

[0182] Figure 1 This is a graph showing the results of the oil dispersibility evaluation test. Regarding the viscosity of the dispersions prepared using cosmetic powder materials coated (surface treated) with MEL and DG4ISA (Examples 1, 7, and 11), and Comparative Example 5 (surface treated only with DG4ISA), the viscosity values ​​are smaller compared to those of the dispersion prepared using only MEL. Furthermore, the viscosity of the dispersion prepared using Example 11 is smaller compared to that prepared using Comparative Example 5. Therefore, it can be said that by combining MEL (component (a)) and DG4ISA (component (b)) and then performing surface treatment, the cosmetic powder materials of the present invention maintain dispersibility at or above the level of DG4ISA, and exhibit superior dispersibility in oils compared to cosmetic powder materials coated only with MEL. Additionally, the cosmetic powder materials of Examples 1, 7, and 11 exhibit the same level of dispersibility in oils. Therefore, it can be said that when preparing a mixture, there is no significant difference in the dispersibility of cosmetic powder materials in an oil when using organic solvents or water.

[0183] [Emulsion Stability Evaluation]

[0184] It is known that pigments coated with MEL can exhibit high emulsion stability even without the use of surfactants by forming Pickering emulsions. To confirm that this property was not lost after combining MEL with ester compounds, the emulsion stability of cosmetic powder materials from Examples 1, 5-7, 11, 1 (Comparative Examples), 5, 10-12, was evaluated as follows. First, 5 g of alkane with 9-12 carbon atoms (C9-12 alkanes) and 0.5 g of cosmetic powder material were added to a 50 mL UM sample vial and mixed by hand shaking. Then, 5 g of deionized water was added and further shaken. The UM sample vial was allowed to stand, and the appearance of the dispersion inside the vial was observed after 1 minute, 30 minutes, and 1 hour. The samples were evaluated on a scale of 1 to 4 based on the following criteria. A higher score indicates a better evaluation, and a score of 4 indicates sufficient emulsion stability. The results are shown in Table 2.

[0185] (Judgment Criteria)

[0186] 4 points: It remained emulsified even after standing for 1 hour (good).

[0187] 3 points: Demulsification occurs within 1 hour after standing (normal).

[0188] 2 points: Demulsification occurred within 30 minutes after standing (poor).

[0189] 1 point: Demulsification occurs within 1 minute after standing (poor).

[0190]

[0191] As shown in Table 2, the emulsification stability of the cosmetic powder materials of Examples 1, 7, 11, 5, 6, and Comparative Example 1 was evaluated as 4 points, showing good emulsification stability. Therefore, it can be said that the cosmetic powder material of the present invention, like the cosmetic powder material coated only with MEL, has excellent emulsification stability. On the other hand, the emulsification stability of the cosmetic powder materials of Comparative Examples 5, 10-12 was evaluated as 3 points or less, and sufficient emulsification stability could not be obtained.

[0192] [Example 15, Comparative Example 13, and Comparative Example 14]

[0193] The cosmetic materials (W / O type liquid foundation) of Example 15, Comparative Example 13, and Comparative Example 14 were obtained using the methods described below according to the formulations shown in Table 3. It should be noted that the unit for the amount of each ingredient is % by mass.

[0194] (Preparation method of W / O type liquid foundation)

[0195] First, mix component A, which is an oily component, using a disperser until homogeneous. Then, slowly add component B, which is a powder component, to the mixture of component A under the same disperser, stirring until homogeneous. Next, mix component C, which is an aqueous component, and then slowly add the mixture of component C to the mixture of components A and B under the same disperser, thereby emulsifying the mixture.

[0196]

[0197] The W / O type foundation liquids obtained in Example 15, Comparative Example 13, and Comparative Example 14 were evaluated for dispersibility and tactile feel upon application to the skin using microscopic observation. The tactile feel was evaluated based on weight, adherence, and usability. Adhesion and usability were evaluated on a four-level scale according to the following criteria. The results are shown in Table 4.

[0198] (Judgment Criteria)

[0199] • Fit

[0200] A: It has good staying power.

[0201] B: Good makeup staying power

[0202] C: Poor makeup staying power

[0203] D: Poor makeup staying power

[0204] User experience

[0205] A: Good user experience

[0206] B: Good user experience

[0207] C: Poor user experience

[0208] D: Poor user experience

[0209]

[0210] The results of the dispersibility evaluation showed that the cosmetic material of Comparative Example 13 exhibited powder agglomeration. On the other hand, the cosmetic materials of Example 15 and Comparative Example 14 were uniformly dispersed. It was confirmed that the cosmetic material of the present invention possesses dispersibility as excellent as that of cosmetic materials that have undergone surface treatment using DG4ISA alone.

[0211] The results of the tactile evaluation showed that the cosmetic material of Comparative Example 14 was thin and had poor adhesion. On the other hand, the cosmetic materials of Comparative Example 13 and Example 15 showed excellent results in any evaluation item. It is confirmed that the cosmetic material of the present invention has an excellent tactile feel that cannot be obtained by using DG4ISA alone.

[0212] [Example 16, Comparative Example 15, and Comparative Example 16]

[0213] The cosmetic materials (W / O type liquid foundation) of Example 16, Comparative Example 15, and Comparative Example 16 were obtained using the methods described below according to the formulations shown in Table 5. It should be noted that the unit for the amount of each ingredient is % by mass.

[0214] (Preparation method of W / O type liquid foundation)

[0215] First, mix component A (components A1 and A2), which are oily components, using a disperser until homogeneous. Then, slowly add component B, which is a powder component, to the mixture of component A under the same disperser, stirring until homogeneous. Next, mix component C (components C1 and C2), which are aqueous components, and then slowly add the mixture of component C to the mixture of components A and B under the same disperser, thereby emulsifying the mixture.

[0216]

[0217] The W / O type foundation creams obtained in Example 16, Comparative Example 15, and Comparative Example 16 were evaluated for dispersibility and skin feel by means of microscopic observation, as described above. The results are shown in Table 6.

[0218]

[0219] The results of the dispersibility evaluation showed that the cosmetic material of Comparative Example 15 exhibited powder agglomeration. On the other hand, the cosmetic materials of Example 16 and Comparative Example 16 were uniformly dispersed. It was confirmed that the cosmetic material of the present invention possesses dispersibility as excellent as that of cosmetic materials that have undergone surface treatment using DG4ISA alone.

[0220] The results of the tactile evaluation showed that the cosmetic material of Comparative Example 16 was heavy and had a poor user experience. On the other hand, the cosmetic material of Example 16 showed excellent results in all evaluation items. It is confirmed that the cosmetic material of the present invention has an excellent tactile feel that cannot be obtained by using MEL or DG4ISA alone.

[0221] [Example 17, Comparative Example 17, and Comparative Example 18]

[0222] The cosmetic materials (W / O type concealer) of Example 17, Comparative Example 17, and Comparative Example 18 were obtained using the methods described below according to the formulations shown in Table 7. It should be noted that the unit of measurement for the amount of each ingredient is % by mass.

[0223] (The method of making W / O type concealer)

[0224] First, mix component A, which is an oily component, using a disperser until homogeneous. Then, slowly add component B, which is a powder component, to the mixture of component A under the same disperser, stirring until homogeneous. Next, mix component C, which is an aqueous component, and then slowly add the mixture of component C to the mixture of components A and B under the same disperser, thereby emulsifying the mixture.

[0225]

[0226] The W / O type concealers obtained in Examples 17, 17, and 18 were evaluated for dispersibility using a microscope, as described above. Additionally, the feel upon application to the skin was evaluated. In the feel evaluation, weight, adherence, and usability were evaluated as described above, and spreadability was evaluated on a four-level scale according to the following criteria. The results are shown in Table 8.

[0227] (Judgment Criteria)

[0228] ·Easy to stretch

[0229] A: Easy to stretch

[0230] B: Easier to stretch

[0231] C: Difficult to extend

[0232] D: Difficult to extend

[0233]

[0234] The results of the dispersibility evaluation showed that the cosmetic material of Comparative Example 17 exhibited powder agglomeration. On the other hand, the cosmetic materials of Example 17 and Comparative Example 18 were uniformly dispersed. It was confirmed that the cosmetic material of the present invention possesses dispersibility as excellent as that of cosmetic materials that have undergone surface treatment using DG4ISA alone.

[0235] The results of the tactile evaluation showed that the cosmetic material of Comparative Example 17 was heavy, while the cosmetic material of Comparative Example 18 had poor adhesion, spreadability, and user experience. On the other hand, the cosmetic material of Example 17 showed excellent results in all evaluation items. It is confirmed that the cosmetic material of the present invention has an excellent tactile feel that cannot be obtained by using MEL or DG4ISA alone.

[0236] Industrial availability

[0237] The powder material for cosmetics of the present invention is suitable for cosmetics, and is particularly suitable for color cosmetics such as foundation, eyeshadow, eyebrow powder, and blush that contain pigments.

Claims

1. A cosmetic powder material comprising cosmetic powder that has been surface-treated with a surface-treatment agent. The surface treatment agent contains: Component a: mannose erythritol ester as shown in formula (1) below, and Component b: An ester compound of glycerol and fatty acids with 8 to 20 carbon atoms. The content of component a is 0.5% to 3% by mass. The content of component b is 0.1% to 10% by mass; In the above formula (1), R 1 and R 2 Each independently represents an aliphatic acyl group having 6 to 20 carbon atoms, R 3 and R 4 Each can be represented independently as a hydrogen atom or an acetyl group, where n represents an integer from 2 to 4.

2. The powder material for cosmetics according to claim 1, wherein, Component b is selected from at least one of tetraisostearate diglyceride, triisostearate diglyceride, tri(caprylic / capric) glyceride, dilaurate glyceride, triisostearate glyceride, monoisostearate decaglyceride, and diisostearate decaglyceride.

3. The powder material for cosmetics according to claim 1, wherein, The R 1 and R 2 Each is an aliphatic acyl group with 10 to 14 carbon atoms.

4. The powder material for cosmetics according to claim 1, wherein, The powder used in the cosmetic is selected from at least one of titanium dioxide, iron oxide yellow, iron oxide red, iron oxide black, talc, zinc oxide, silicon dioxide, pearlescent mica, mica, and sericite.

5. A method for manufacturing a powder material for cosmetics, comprising: The mixing process involves mixing the mixture with cosmetic powder, wherein the mixture is obtained by dispersing, suspending, or dissolving component a: mannose erythritol ester as shown in formula (1) below and component b: glycerol and an ester compound of fatty acids with carbon numbers of 8 to 20 in a solvent; and A heat treatment step is performed on the mixture obtained in the mixing step. In the above formula (1), R 1 and R 2 Each independently represents an aliphatic acyl group having 6 to 20 carbon atoms, R 3 and R 4 Each can be represented independently as a hydrogen atom or an acetyl group, where n represents an integer from 2 to 4.

6. The method for manufacturing powder material for cosmetics according to claim 5, wherein, In the mixing process, the ratio of the solvent in the mixture to component a is adjusted to 10:1 or more by mass.

7. The method for manufacturing a cosmetic powder material according to claim 5 or 6, wherein, In the heat treatment process, the mixture is heat-treated at 70°C to 150°C.

8. The method for manufacturing a cosmetic powder material according to claim 5 or 6, wherein, The solvent is an organic solvent and / or water.

9. A cosmetic material comprising any one of the powder materials for cosmetics according to claims 1 to 4.

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