Iron oxide pigments for cosmetic compositions and cosmetic compositions containing iron oxide pigments

Abstract

Provided: An iron oxide pigment for use in cosmetic compositions, exhibiting large a and / or b values ​​and chromaticity even in areas of low brightness, and possessing high tinting strength. An iron oxide pigment for use in cosmetic compositions, formed of a spinel structure or a combination of spinel and corundum structures, wherein the iron oxide pigment has an Fe content of 680 g / kg or more and 702 g / kg or less, an FeO content of 30 g / kg or less, an Fe2O3 content of 939 g / kg or more, and the total content of FeO and Fe2O3 is 968 g / kg or more.

Description

Technical Field

[0001] This invention relates to iron oxide pigments for use in cosmetic compositions, and cosmetic compositions containing iron oxide pigments. The iron oxide pigments of this invention are particularly suitable for use in cosmetic compositions formulated for darker skin tones. Background Technology

[0002] The current environment surrounding the pursuit of cosmetics has undergone significant changes. Previously, the purchasing power of economically capable individuals for industrially produced cosmetics was limited by nationality or region; cosmetics that aligned with the physical characteristics and values ​​of the majority of those individuals were the market's demand. However, in recent years, due to changes in the global economy and population structures, the range of economically capable individuals has narrowed considerably, leading to a greater demand for cosmetics that were previously unavailable. Within the field of skincare cosmetics, there has been a surge in demand for products that cater to previously undervalued skin tones, particularly those with darker complexions.

[0003] Pigments with iron oxide as the main component can be oxidized and reduced to produce various colors such as red, yellow, and black. They have excellent tinting strength and are relatively harmless to the human body. Therefore, they are widely used as pigments in cosmetics, including skin cosmetics. Japanese Patent Application Publication No. 2014-101298 (Patent Document 1) describes an example of manufacturing an aqueous dispersion of a brown cosmetic by appropriately combining carbon black or the like with iron oxide red or iron oxide yellow. Furthermore, the same dispersion is used to make a pen-shaped eyeliner. Patent Document 1 describes that by using specific micro-particle iron oxide as the iron oxide, pigment separation and sedimentation over time are not observed, and blockage in the pen-shaped container is not caused. However, as in Patent Document 1, when reproducing a brown color by mixing various colored pigments, the components usually separate during storage due to differences in the physical properties of each pigment (hereinafter referred to as "color separation"), making it difficult to use in cosmetics. Furthermore, Patent Document 1 does not describe the tinting strength of the pigment.

[0004] Japanese Patent Application Publication No. 2-145506 (Patent Document 2) discloses a brown-based liquid cosmetic comprising at least iron oxide black oxidized by an oxidizing agent and water. It describes the use of iron oxide black oxidized to form the target brown color as a colorant in the liquid cosmetic, thereby preventing color separation. Patent Document 2 also describes the use of this brown-based liquid cosmetic in eyeliner, etc.

[0005] On the other hand, when used as a skin cosmetic, stricter color adjustments are required compared to applications such as eyeliner. Skin cosmetics need to achieve a bright and healthy look; conversely, a large color difference with the surrounding skin tone can sometimes create an unnatural impression due to light reflection. In existing cosmetics, subtle color adjustments can be made by mixing color modifiers. For the desired color in a bright area, color adjustments based on the mixing of color modifiers can be made. However, in areas with low brightness, such as dark skin, the chromaticity is also low; therefore, it is difficult to adjust subtle colors and achieve a bright look by mixing color modifiers.

[0006] Furthermore, in order to achieve wide application of skin cosmetics, a good feel and ease of use are crucial. However, when iron oxide pigments have low tinting strength, they must be mixed in large quantities into the cosmetic composition, resulting in a powdery feel when the customer uses the cosmetic. Additionally, it becomes difficult to apply the cosmetic over a wide area.

[0007] Cosmetics designed for dark skin should ideally have high chroma in areas of low brightness, and consequently, high tinting strength of the pigments. Reference 2, however, does not address the chroma and tinting strength of the pigments in areas of low brightness in its brown-toned liquid cosmetics.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: Japanese Patent Application Publication No. 2014-101298

[0011] Patent Document 2: Japanese Patent Application Publication No. 2-145506 Summary of the Invention

[0012] The problem the invention aims to solve

[0013] This invention provides an iron oxide pigment for use in cosmetic compositions that exhibits high chromaticity even in areas of low brightness and has high tinting strength. Iron oxide pigments possessing the aforementioned characteristics are particularly suitable for use in cosmetic compositions formulated for darker skin tones.

[0014] Solution for solving the problem

[0015] The inventors conducted in-depth research on the composition of iron oxide pigments used in cosmetics and found that when iron oxide pigments with an Fe content of 680 g / kg or more and 702 g / kg or less, an FeO content of 30 g / kg or less, an Fe2O3 content of 939 g / kg or more, and a total FeO and Fe2O3 content of 968 g / kg or more, and with a spinel structure or a combination of spinel and corundum structure, are mixed into cosmetic compositions, they exhibit high chromaticity even in areas with low brightness, thus resulting in high pigment strength.

[0016] The iron oxide pigments and cosmetic compositions used in the cosmetic compositions of the present invention are not limited, but include the following. [1]

[0018] An iron oxide pigment for use in cosmetic compositions, having a spinel structure or a combination of spinel and corundum structure, wherein the iron oxide pigment has an Fe content of 680 g / kg or more and 702 g / kg or less, an FeO content of 30 g / kg or less, an Fe2O3 content of 939 g / kg or more, and the total content of FeO and Fe2O3 is 968 g / kg or more. [2]

[0020] According to the iron oxide pigment described in [1], Pb is less than 10 mg / kg, As is less than 3 mg / kg, Hg is less than 1 mg / kg, Cd is less than 1 mg / kg, Zn is less than 100 mg / kg, Ba is less than 50 mg / kg, Cr is less than 100 mg / kg, Cu is less than 50 mg / kg, and Ni is less than 200 mg / kg. [3]

[0022] According to the iron oxide pigment described in [1] or [2], in X-ray diffraction measurements, when the integrated intensity of the diffraction lines of the spinel structure iron oxide (311) plane appearing with a diffraction angle of 35.10° or more and 36.10° or less is set to 100.00, the integrated intensity of the diffraction lines of the corundum structure iron oxide (104) plane appearing with a diffraction angle of 32.60° or more and 33.60° or less is 10.0 or less. [4]

[0024] According to any one of [1] to [3], the iron oxide pigment has an average minor axis length of 50 nm or more and 500 nm or less for its primary particles. [5]

[0026] The iron oxide pigment according to any one of [1] to [4] has a BET specific surface area of ​​2.0 m². 2 / g or more and 25.0m 2The volume density is below 70 g / mL, and the residue when passing through a sieve with an opening of 45 μm is below 1.0 g / kg. [6]

[0028] The iron oxide pigment according to any one of [1] to [5] has an oil absorption of 20g / 100g or more and 50g / 100g or less. [7]

[0030] A cosmetic composition comprising any one of the following: [1] to [6] an iron oxide pigment. [8]

[0032] The cosmetic composition described in [7] is a skin cosmetic. [9]

[0034] The cosmetic composition according to [7] or [8] is a liquid cosmetic.

[10]

[0036] The cosmetic composition according to [7] or [8] is a solid cosmetic.

[11]

[0038] The cosmetic composition according to [7] or [8] is a gel cosmetic.

[12]

[0040] The cosmetic composition according to any one of [7] to

[11] is used for the purpose of reproducing dark colors.

[0041] The effects of the invention

[0042] When the iron oxide pigment of the present invention is incorporated into a cosmetic composition, it exhibits large a and / or b values, as well as chromaticity, even in areas of low brightness. Furthermore, it possesses high tinting strength. Due to these characteristics, it is particularly suitable for use as a colorant in skin-care cosmetics formulated for darker skin tones. Additionally, when the iron oxide pigment of the present invention is incorporated into a cosmetic composition, it provides a smooth feel and is easy to apply over a wide range of areas.

[0043] In addition, the cosmetic composition obtained by mixing the iron oxide pigment of the present invention has the characteristics of being easy to manufacture and having low health risks to users. Attached Figure Description

[0044] Figure 1 The results of X-ray diffraction analysis of the iron oxide pigment used in the cosmetic compositions of the present invention are shown.

[0045] Figure 2 The relationship between the brightness of the cosmetic composition obtained according to the present invention and the a value is shown.

[0046] Figure 3 The relationship between the brightness and b-value of the cosmetic composition obtained according to the present invention is shown.

[0047] Figure 4 The relationship between brightness and chromaticity of the cosmetic composition obtained according to the present invention is shown. Detailed Implementation

[0048] The Fe content of the iron oxide pigment used in the cosmetic composition of the present invention must be 680 g / kg or more and 702 g / kg or less. Furthermore, the FeO content must be 30 g / kg or less, the Fe2O3 content must be 939 g / kg or more, and the total content of FeO and Fe2O3 must be 968 g / kg or more. In the present invention, in order to present a saturated brown hue, the contents of Fe, FeO, and Fe2O3 must be within the above-mentioned ranges. When the FeO content is greater than 30 g / kg or the Fe content is greater than 702 g / kg, the cosmetic composition containing the pigment becomes a dark, low-saturation hue. Furthermore, when the Fe content in the pigment is less than 680 g / kg, the Fe2O3 content is less than 939 g / kg, or the total content of FeO and Fe2O3 is less than 962 g / kg, the resulting cosmetic composition becomes a dull color, and the saturation remains low. More preferably, the Fe content is 680 g / kg or more and 701 g / kg or less, the FeO content is 20 g / kg or less, the Fe2O3 content is 950 g / kg or more, and the total content of FeO and Fe2O3 is 970 g / kg or more.

[0049] The iron oxide pigment used in the cosmetic composition of the present invention is preferably of a spinel structure, or a combination of spinel and corundum structures. In the case of a spinel and corundum structure, it is desirable that the intensity of the diffraction lines derived from the corundum structure, as determined by X-ray diffraction, is low. Specifically, when the integrated intensity of the diffraction lines from the (311) plane of the spinel-structured iron oxide, which appears at a diffraction angle of 35.10° or higher and 36.10° or lower, is set to 100.00, the integrated intensity of the diffraction lines from the (104) plane of the corundum-structured iron oxide, which appears at a diffraction angle of 32.60° or higher and 33.60° or lower, is preferably 10.0 or lower. When the intensity of the diffraction lines from the corundum structure is high, the brightness of the resulting cosmetic composition increases, making it difficult to achieve the desired hue. More preferably, the integrated intensity of the diffraction lines derived from the corundum structure is 7.0 or lower, and even more preferably 5.0 or lower.

[0050] The iron oxide pigments used in the cosmetic compositions of the present invention are expected to have low heavy metal content. Specifically, it is desirable that the pigments contain less than 10 mg / kg of Pb, less than 3 mg / kg of As, less than 1 mg / kg of Hg, less than 1 mg / kg of Cd, less than 100 mg / kg of Zn, less than 50 mg / kg of Ba, less than 100 mg / kg of Cr, less than 100 mg / kg of Cu, and less than 200 mg / kg of Ni. By reducing the content of heavy metal oxides and salts, the scattering and absorption of light based on oxides and salts can be suppressed, thereby suppressing the reduction of color. In addition, from the viewpoint of cosmetic use, a low heavy metal content is desirable. In particular, in recent years, consumers have become increasingly demanding regarding the safety of cosmetics, and restrictions on heavy metal content have been gradually strengthened in many countries. By reducing the heavy metal content, risks such as the re-evaluation of sales plans accompanied by strengthened restrictions and the occurrence of consumer claims can be avoided. The content of heavy metals is further optimized to be less than 2 mg / kg for Pb, less than 2 mg / kg for As, less than 1 mg / kg for Hg, less than 1 mg / kg for Cd, less than 20 mg / kg for Zn, less than 5 mg / kg for Ba, less than 20 mg / kg for Cr, less than 10 mg / kg for Cu, and less than 5 mg / kg for Ni.

[0051] The iron oxide pigment used in the cosmetic compositions of the present invention preferably has an average minor axis length of 50 nm or more and 500 nm or less for the primary particles. If the average minor axis length is 50 nm or more, the chromaticity tends to increase; conversely, if the average minor axis length is 500 nm or less, the tinting strength tends to increase. More preferably, the average minor axis length is 100 nm or more and 350 nm or less, and even more preferably 100 nm or more and 300 nm or less. It should be noted that the major axis length is not limited. The ratio of the average major axis length to the average minor axis length is not particularly limited, and is typically used to be around 1 to 200.

[0052] The average minor axis length and average major axis length of primary particles of iron oxide pigment can be calculated, for example, by observing approximately 100 to 500 primary particles of the pigment using a transmission electron microscope and calculating their average values.

[0053] The iron oxide pigment used in the cosmetic compositions of the present invention is expected to have a specific surface area (hereinafter referred to as "BET specific surface area") of 2.0 m², as measured by the BET method. 2 / g or more and 25.0m 2 / g or less. If the BET specific surface area is 2.0m²... 2 If the amount exceeds / g, the tinting strength is prone to change. Additionally, if the BET specific surface area is 25.0m²... 2Below a certain value (e.g., g / g), aggregate formation is suppressed, making it easier to obtain a uniform tactile feel. A more preferred BET specific surface area is 3.0 m² / g. 2 / g or more and 20.0m 2 / g or less, further preferred 4.0m 2 / g or more and 15.0m 2 / g or less, and preferably 5.0m 2 / g or more and 14.0m 2 / g or less.

[0054] The iron oxide pigment used in the cosmetic compositions of the present invention is preferably of a bulk density of 70 g / mL or less. If the bulk density is 70 g / mL or less, the chroma tends to increase. Preferably, the bulk density is 10 g / mL or more and 67 g / mL or less, more preferably 10 g / mL or more and 65 g / mL or less, and even more preferably 15 g / mL or more and 45 g / mL or less.

[0055] Bulk density, as described in the Examples section, can be determined by method according to JISK5101-12-1.

[0056] The iron oxide pigment used in the cosmetic compositions of the present invention is expected to have a residue of less than 1.0 g / kg when passing through a sieve with an opening of 45 μm. If the sieve residue is less than 1.0 g / kg, there are fewer pigment clumps, making it easier to reduce the unpleasant prickling sensation when using the cosmetic composition. More preferably, the sieve residue is less than 0.5 g / kg, and even more preferably less than 0.3 g / kg.

[0057] The residues on the sieve described above, for example, as described in the Examples section, can be determined by the method according to JISK5101-14-1.

[0058] The iron oxide pigment used in the cosmetic composition of the present invention is expected to have an oil absorption capacity of 20g / 100g or more and 50g / 100g or less. If the oil absorption capacity is 50g / 100g or less, the greasiness of the cosmetic composition is reduced, making it easier to reduce the unpleasant feel caused by greasiness when using the cosmetic composition. Furthermore, if the oil absorption capacity is 20g / 100g or more, the cosmetic composition can be prevented from fading due to sebum. More preferably, it is 25g / 100g or more and 45g / 100g or less.

[0059] The amount of oil absorbed, as described in the Examples section, can be determined by the method according to JISK5101-13-2.

[0060] There are no particular limitations on the method for manufacturing the iron oxide pigment used in the cosmetic compositions of the present invention. Generally, it can be manufactured by dehydrating, reducing, and then oxidizing iron oxide yellow, or by oxidizing iron oxide black.

[0061] Here, yellow iron oxide is typically formed from an iron oxide called goethite, represented by the chemical formula α-FeOOH. Although there are differences based on observers and environments, it usually presents a yellow color, or a color close to yellow, as commonly used in JIS. Black iron oxide is typically formed from an iron oxide called magnetite, represented by the chemical formula Fe3O4. Although there are differences based on observers and environments, it usually presents a color close to black, as commonly used in JIS.

[0062] Iron oxide yellow and iron oxide black can be synthesized using known techniques. For example, iron oxide yellow can be manufactured as follows: A divalent iron salt aqueous solution is maintained at a constant temperature ranging from 20°C to 65°C, neutralized with an alkali, oxidized with oxygen-containing gas, stirred and matured, mixed with a divalent iron salt aqueous solution, neutralized again with an alkali, oxidized with oxygen-containing gas, filtered, and dried. Iron oxide black can be manufactured as follows: Ferrous hydroxide precipitate is formed by the neutralization reaction of a divalent iron salt aqueous solution with an alkali hydroxide, and oxidation is carried out by blowing air while controlling the pH and temperature of the aqueous solution. In these manufacturing methods, the composition and particle size of the resulting iron oxide particles can be controlled by controlling the pH of the aqueous solution and the oxidation time.

[0063] When obtaining iron oxide pigments for use in the cosmetic compositions of the present invention from iron oxide yellow, it is possible to obtain them by dehydration, reduction, and then oxidation. As an example, a method can be described as follows: dehydrating iron oxide yellow, reducing the product, and then oxidizing it. For example, not limited to this, by calcining iron oxide yellow in air at 200°C, calcining the product in a hydrogen atmosphere at 300°C, and then calcining it in air at 200°C, the iron oxide pigment suitable for the present invention can be obtained. Calcination is generally performed using a kiln, preferably while the kiln is rotating. Furthermore, reduction is not limited to a hydrogen atmosphere; organic materials or other reducing gases can be used.

[0064] When obtaining an iron oxide pigment for use in the cosmetic composition of the present invention from iron oxide black, it can be obtained by oxidizing the iron oxide black. Specifically, iron oxide black is fired in air to obtain an iron oxide pigment suitable for the present invention. There are no limitations on the number of firings or the time, and firing can be performed in multiple stages. In addition, the temperature can be varied at this time.

[0065] Alternatively, the oxidation of iron oxide black can also be carried out in water. Specifically, iron oxide black particles are dispersed in water and then contacted with air, or an oxidizing agent is added, to obtain the product. There are no particular limitations on the method of contacting with air; typically, air is blown into the reaction tank. There are no particular limitations on the oxidizing agent; for example, hydrogen peroxide can be used. There are no limitations on the liquid temperature; generally, the oxidation rate increases above 60°C, which is preferred industrially. Temperatures below 90°C do not cause boiling, and are therefore preferred from a safety perspective.

[0066] The iron oxide pigment used in the cosmetic compositions of the present invention can also be obtained by methods other than those described above. For example, the iron oxide pigment for the cosmetic compositions of the present invention can be manufactured by the method described in Japanese Patent Application Publication No. 11-092148, in which iron is heated and oxidized, and then the iron oxide is stripped from the iron, thereby separating and recovering maghemite (γ-Fe2O3). Alternatively, the iron oxide pigment for the cosmetic compositions of the present invention can be manufactured by the method described in Japanese Patent Application Publication No. 2000-336496, in which a voltage is applied to an electrolyte containing iron ions, the precipitated substance is oxidized, and then heated to obtain maghemite ultrafine particles. However, manufacturing methods other than those using iron oxide yellow or iron oxide black generally require special equipment and environments, tending to increase costs.

[0067] For example, to improve the dispersion stability and durability in the dispersion medium during the manufacture of the cosmetic composition, an inorganic coating layer, such as a hydroxide or oxide of a metal like aluminum, silicon, zinc, titanium, zirconium, iron, cerium, or tin, can be applied to at least a portion of the surface of the iron oxide pigment used in the cosmetic composition. Alternatively, metal salts other than those mentioned above can be used as the inorganic coating layer. Furthermore, an organic coating layer can be applied to at least a portion of the particle surface to perform surface modification, such as hydrophobic treatment. Examples of organic coatings include treatments with organosilicon compounds such as polydimethylsiloxane and polymethylhydrosiloxane, coupling agents such as silanes, aluminum-based, titanium-based, and zirconium-based compounds, fluorinated compounds such as perfluoroalkyl phosphates, hydrocarbons, lecithin, amino acids, polyethylene, waxes, and metal soaps. Multiple treatments can be combined, and the order of treatment is not particularly limited.

[0068] The iron oxide pigment used in the cosmetic compositions of the present invention is preferably washed and purified after manufacturing, within the scope of common knowledge of those who manufacture materials for use in cosmetic compositions. Residual impurities in the iron oxide pigment may affect its function as a cosmetic.

[0069] The cosmetic composition of the present invention can be manufactured by combining other materials required in the cosmetic composition with an iron oxide pigment having the above-described characteristics. There are no particular limitations on the method of manufacturing the cosmetic composition. For example, it can be manufactured by mixing the iron oxide pigment with other ingredients to form a desired dosage form such as a liquid, solid, or gel, as described later. For example, in the case of forming a solid cosmetic composition, the ingredients can be dried, shaped, etc., as needed after mixing. There are no particular limitations on the apparatus used for mixing, drying, shaping, etc.

[0070] The cosmetic composition of the present invention is expected to contain 0.1 g / kg or more and 500 g / kg or less of the iron oxide pigment of the present invention having the above-described characteristics. If the amount of iron oxide pigment is 500 g / kg or less, the cosmetic composition is prevented from having a powdery texture and becomes easier to spread and apply over a wide range. More preferably, 0.1 g / kg or more and 450 g / kg or less, even more preferably, 0.1 g / kg or more and 400 g / kg or less, and even more preferably, 0.1 g / kg or more and 300.0 g / kg or less.

[0071] The cosmetic composition of the present invention may use only the iron oxide pigment of the present invention as a colorant. Alternatively, other pigments may be added within a quantitative and qualitative range without impairing the effect of the present invention to adjust the hue. Commonly used inorganic pigments include: titanium dioxide, zinc oxide, iron oxide red, iron oxide yellow, iron oxide black, ultramarine, dark blue, Indian red, cerium oxide, talc, muscovite, synthetic mica, phlogopite, biotite, synthetic fluorophlogopite, mica titanium, mica-like iron oxide, sericite, zeolite, kaolin, bentonite, clay, silicic acid, silicic anhydride, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium sulfate, magnesium sulfate, calcium sulfate, calcium carbonate, magnesium carbonate, boron fluoride, bismuth oxychloride, aluminum oxide, zirconium oxide, magnesium oxide, chromium oxide, chalcanthite, hydroxyapatite, and their complexes. Among the organic pigments that can be used in combination are: organosilicon powder, organosilicon elastic powder, polyurethane powder, cellulose powder, nylon powder, urethane powder, silk powder, PMMA powder, starch, polyethylene powder, polystyrene powder, carbon black, tar pigment, natural pigment, zinc stearate and other metal soaps, and complexes thereof. When a pigment other than the iron oxide pigment of the present invention is added to the cosmetic composition of the present invention, from the viewpoint of preventing color separation, iron oxide red, iron oxide yellow, and / or iron oxide black are preferred among the above-mentioned pigments to be added.

[0072] It should be noted that iron oxide red is usually formed from an iron oxide called hematite, represented by the chemical formula α-Fe₂O₃. Although there are differences based on the observer and environment, it usually presents a red, close to red color as commonly referred to in JIS.

[0073] In cosmetic compositions containing the iron oxide pigment of the present invention, other components besides the pigment may be blended in a quantitative and qualitative range, depending on the purpose, without impairing the effects of the present invention. For example, one or more of the following may be suitable blends: oily components, pigments, pH adjusters, humectants, thickeners, surfactants, dispersants, stabilizers, preservatives, antioxidants, masking agents, astringents, anti-inflammatory agents, ultraviolet absorbers, fragrances, abrasives, etc. In particular, if a plate-like compound, such as mica, is blended, the smoothness of the cosmetic composition improves, which is therefore desirable.

[0074] (Uses of cosmetics)

[0075] Cosmetic compositions containing the iron oxide pigments of the present invention exhibit high a and / or b values ​​and chromaticity even in areas of low brightness, resulting in high pigment tinting strength. Therefore, they are particularly suitable for use as cosmetics for dark skin tones. When used as cosmetics for dark skin tones, the cosmetic compositions of the present invention can also create a healthy appearance with vibrant hues and a natural impression. It should be noted that "vibrant" and "high chromaticity" have the same meaning in this specification. Furthermore, a single pigment can reproduce dark colors that were previously impossible to reproduce without mixing two or more iron oxide pigments. In this case, it can be used as a skin cosmetic without color separation. In addition, when other pigments besides the pigments of the present invention are mixed to reproduce dark colors, the characteristic of the pigments of the present invention, which exhibit high chromaticity even in areas of low brightness, allows for a reduction in the types of other pigments mixed. In this case, a cosmetic composition that is less prone to color separation can be formed.

[0076] Furthermore, the iron oxide pigment of the present invention has high tinting strength, thus allowing cosmetic compositions to achieve the desired hue with less content than in the past, increasing the flexibility of formulation. By blending the iron oxide pigment of the present invention with a hue adjuster, subtle hues can be adjusted even in dark colors, enabling the expression of a wide range of colors. Additionally, the cosmetic compositions of the present invention can also be used as cosmetics for skin that is not dark in color. By using the iron oxide pigment of the present invention, cosmetic compositions can achieve a smooth feel and easy application over a wide range of areas.

[0077] It should be noted that "dark skin" generally refers to dark or deep-colored skin. The impression of a person's skin color is greatly influenced by the observer, environment, and psychological effects. However, in this specification, the terminology is defined solely for the purpose of clarifying the scope of a preferred embodiment of the invention. When evaluating reflected light using a colorimeter, skin with a luminance L value of 30 or less in the Lab color space is defined as "dark skin." It should be emphasized that falling within the above numerical range has no social significance. Whether an individual's skin is dark or not should not be used as the basis for any judgment regarding that individual.

[0078] The cosmetic composition of the present invention can also be used as a cosmetic other than a skin cosmetic. The cosmetic composition of the present invention can be used as a substitute for conventionally used brown-toned cosmetic compositions.

[0079] (Cosmetic dosage forms)

[0080] Liquid cosmetics are one of the cosmetic compositions of the present invention. As a dosage form, it can be any state such as an aqueous dispersion, an oily dispersion, or an emulsion, and can form, for example, color-controlling isolation creams, sunscreens, eyeshadows, eyeliners, mascaras, blushes, nail polishes and other color cosmetics, skin care cosmetics, hair care cosmetics, permanent hair dyes, semi-permanent hair dyes, one-time hair dyes, nail art cosmetics, etc.

[0081] Solid cosmetics are one type of cosmetic composition according to the present invention. As a dosage form, it can be in any state, such as powder, powdered solid, paste, or oily solid, and can be used to form makeup products such as sunscreen, foundation, pressed powder, blush, concealer, eyebrow pencil, loose powder, color-controlling sunscreen, mascara, blush, talcum powder, pressed powder, perfume powder, and baby powder, as well as skincare and haircare products. Additionally, it can be used as a colorless cosmetic, such as cleansing powder, soap, or powdered bath salt.

[0082] Gel-like cosmetics are one type of cosmetic composition according to the present invention. As a dosage form, it can be in any state such as cream, lotion, oily liquid, or paste, and can be used to form makeup products such as sunscreens, color-controlling creams, sunscreens, lipsticks, eyeshadows, eyeliners, mascaras, lip balms, lipsticks, lip glosses, and nail polish, as well as skincare and haircare products. Additionally, it can be used in cosmetics that do not require color, such as shampoos, conditioners, shower gels, foaming cleansers, peel-off masks, and toothpaste.

[0083] Example

[0084] The present invention will now be specifically described with reference to embodiments, but the embodiments described below are merely examples and the scope of protection of the invention is not limited thereto.

[0085] It should be noted that in the mixing operations described in the examples and comparative examples, the rotation speed was appropriately adjusted to ensure uniform mixing and prevent droplets from scattering, taking into account factors such as the amount of mixture, viscosity, and volume of the apparatus used, which affect the behavior during mixing. Furthermore, if the product is a commonly available commercially available product such as sodium hexametaphosphate, and the same effect is obtained using a product from any manufacturer, the names of the manufacturer and distributor are omitted.

[0086] [Example 1]

[0087] Iron oxide yellow (LL-100HP, manufactured by Titanium Industry), synthesized by a known method, was calcined in air at 380°C for 1 hour. The product was then calcined in a hydrogen atmosphere at 320°C for 4.5 hours, followed by calcination in air at 250°C for 8 hours. After air cooling, iron oxide pigment A was obtained.

[0088] [Example 2]

[0089] Iron oxide black ABL-209HP (made by Titanium Industry), synthesized by a known method, was first calcined in air at 80°C for 4 hours, then at 120°C for 4 hours, then at 160°C for 4 hours, and finally at 200°C for 4 hours, followed by air cooling to obtain iron oxide pigment B.

[0090] [Example 3]

[0091] Iron oxide black BL-100HP (made by Titanium Industry), synthesized by a known method, was subjected to the same operation as in Example 2 to obtain iron oxide pigment C.

[0092] [Comparative Example 1]

[0093] 500 g / kg of commercially available iron oxide yellow LL-100HP (made in the titanium industry, elemental Fe content 622 g / kg, FeO content 0 g / kg, Fe2O3 content 887 g / kg) and 500 g / kg of iron oxide red R-516HP (made in the titanium industry, elemental Fe content 695 g / kg, FeO content 0 g / kg, Fe2O3 content 994 g / kg) were uniformly mixed to form mixed pigment 1. The mixed pigment 1 obtained has an elemental Fe content of 659 g / kg, an FeO content of 0 g / kg, and an Fe2O3 content of 941 g / kg.

[0094] [Comparative Example 2]

[0095] Commercially available iron oxide yellow LL-100HP (750 g / kg), iron oxide red R-516HP (150 g / kg), and iron oxide black BL-100HP (made by titanium industry, with elemental Fe content of 707 g / kg, FeO content of 220 g / kg, and Fe2O3 content of 780 g / kg) (100 g / kg) were uniformly mixed to form mixed pigment 2. The resulting mixed pigment 2 had an elemental Fe content of 641 g / kg, an FeO content of 22 g / kg, an Fe2O3 content of 892 g / kg, and a total FeO, Fe2O3, and FeO content of 914 g / kg.

[0096] [Evaluation Items and Evaluation Methods]

[0097] The following items were evaluated for the iron oxide pigments of Examples 1 to 3 and the mixed pigments of the comparative examples.

[0098] [The Fe content in iron oxide pigments]

[0099] Evaluation was performed according to JIS K 5109. 15 mL of hydrochloric acid was added to 0.3 g of a thoroughly dried iron oxide pigment sample, and the mixture was heated and concentrated to approximately 5 mL. While heating, stannous chloride solution was quietly added dropwise, starting at the point where the liquid became colorless, followed by 2 drops. The mixture was then quenched with running water. 10 mL of saturated mercuric chloride solution was added, and the mixture was allowed to stand for 5 minutes. 20 mL of mixed acid was added, and pure water was added to bring the volume to 50 mL. Five drops of a 2 g / kg sodium diphenylamine-4-sulfonate aqueous solution were added, and titration was performed with 0.05 mol / L potassium dichromate solution, with the endpoint being the point where the color changed from green to purple. When the volume of the 0.05 mol / L potassium dichromate solution used was set as c (mL), the elemental Fe content (g / kg) in the pigment was 18.62 × c. The results are shown in Table 1.

[0100] [FeO content, Fe2O3 content]

[0101] The evaluation was conducted according to the method of JISK 5109.

[0102] 1) FeO content

[0103] Add 35 mL of distilled water and 15 mL of concentrated sulfuric acid to 0.4 g of thoroughly dried iron oxide pigment sample, heat to dissolve, and cool to room temperature with running water. Add 150 mL of pure water, 10 mL of phosphoric acid, and 5 drops of a 2 g / kg sodium diphenylamine-4-sulfonate aqueous solution. Titrate with 0.05 mol / L potassium dichromate solution, and take the point where the color changes from green to purple as the endpoint. When the volume of 0.05 mol / L potassium dichromate solution used is denoted as a (mL), the FeO content (g / kg) in the pigment becomes 17.96 × a.

[0104] 2) Fe2O3 content

[0105] Add 15 mL of hydrochloric acid to 0.4 g of thoroughly dried iron oxide pigment sample, heat and concentrate until approximately 5 mL remains. While heating, quietly add stannous chloride solution dropwise, adding 2 drops after the liquid becomes colorless, and then quench with running water. Add 10 mL of saturated mercuric chloride solution, let stand for 5 minutes, add 20 mL of mixed acid, and add pure water to make a volume of 120 mL. Add 5 drops of 2 g / kg sodium diphenylamine-4-sulfonate aqueous solution, and titrate with 0.05 mol / L potassium dichromate solution, taking the change from green to purple as the endpoint. When the volume of 0.05 mol / L potassium dichromate solution used is set as b (mL), the Fe2O3 content (g / kg) becomes 19.96 × (ba). The results are shown in Table 1.

[0106] Pb, As, Hg, and Cd were analyzed as follows: the iron oxide pigment samples were dissolved in sulfuric acid and then analyzed by ICP-MS. Zn, Ba, Cr, Cu, and Ni were analyzed as follows: the samples were dissolved in hydrochloric acid and then analyzed by ICP. The results are shown in Table 2.

[0107] [X-ray diffraction intensity ratio between corundum and spinel structures]

[0108] X-ray diffraction (XRD) measurements based on the powder method were performed using a Rigaku Corporation RINT-TTR III XRD apparatus. The iron oxide pigment sample was crushed in a mortar and then piled into a cuvette at a rate of approximately 0.7 g ± 0.2 g. The starting angle was set to 5.0000°, the ending angle to 70.0000°, the sampling width to 0.0100°, the scanning speed to 5.0000° / min, the divergence slit to 0.5°, the scattering slit to 0.5°, the light receiving slit width to 0.15 mm, copper to be used as the cathode for characteristic X-rays, and the wavelength to be 0.15418 nm. The obtained XRD patterns were smoothed, background processed, and peak detected using MaterialData's MDI JADE7 analysis software. The XRD results are shown below. Figure 1 The integral intensity ratio of the diffraction lines of the spinel-type structure appearing above 35.10° and below 36.10° to the integral intensity ratio of the diffraction lines of the corundum structure appearing in the range of 32.60° and below 33.60° was calculated when the integral intensity of the spinel-type structure diffraction lines appearing above 35.10° and below 36.10° was set to 100.00. (In this specification, this ratio is also referred to as the "X-ray diffraction line intensity ratio of corundum structure to spinel structure"). It should be noted that if no peak is detected in the range of 32.60° and below 33.60°, it is recorded as 0.00. The results are shown in Table 3.

[0109] [Average minor axis length of primary iron oxide pigment particles]

[0110] Measurements were performed using a JEM-1400plus transmission electron microscope manufactured by JEOL Ltd. The magnification was set to 30,000x (10,000x magnification for the transmission electron microscope × 3x magnification for printing). The minor axis lengths of approximately 300 primary particles within the field of view were evaluated using ImageJ image analysis software. The average minor axis length of these approximately 300 particles was calculated as the mean minor axis length. The results are shown in Table 3.

[0111] [BET specific surface area]

[0112] The determination was performed using a GEMINI VII2390 (MICROMETORITICS) via the BET single-point method. The results are shown in Table 3.

[0113] [Bulk Density]

[0114] Evaluation was performed according to JIS K 5101-12-1. A funnel and a sieve with a 45 μm opening were placed on the funnel stage of a powder analyzer manufactured by Hosokawa Micron Corporation. A cup-sized amount of iron oxide pigment sample (15 mL capacity) was placed on the sieve. The entire surface of the sieve was evenly and lightly brushed with a stiff brush to disperse the sample, which was then collected by a receiver under the funnel stage. This operation was repeated until the sample formed a mound shape in the receiver. Then, the mound was removed with a scraper, and the mass of the contents in the receiver was measured. When the mass of the contents is d (g), the bulk density (g / mL) is d / 30. The results are shown in Table 3.

[0115] [Sieve residue]

[0116] Evaluation was performed according to JIS K 5101-14-1. 1.00 g of the iron oxide pigment sample was dispersed in a 0.5 g / kg sodium hexametaphosphate aqueous solution and then passed through a sieve with a 45 μm opening. The sieve was washed with a small amount of running water, followed by a small amount of ethanol. The sample was dried at 105 °C for 1 hour, and the mass of the sample remaining on the sieve was measured. The proportion of sample remaining on the sieve was calculated. The results are shown in Table 3.

[0117] Oil absorption capacity

[0118] Spread 2g of iron oxide pigment sample onto a glass plate. Add cooked linseed oil dropwise to the center of the sample, mixing the entire sample with a spatula each time to ensure thorough mixing. The endpoint is defined as the point at which the sample becomes a uniform paste. When the amount of cooked linseed oil used is e (mL), the oil absorption (g / 100g) is 46.75 × e. The results are shown in Table 3.

[0119] [a value, b value, and chromaticity]

[0120] Prepare iron oxide pigments A to C, and powders for which 250 g / kg of each pigment in Mixed Pigment 1 is replaced with iron oxide black BL-100HP to reduce brightness. Mix 834 g / kg of ALUKIDIR (registered trademark) 4250 (manufactured by DIC Corporation), 156 g / kg of xylene, and 10 g / kg of 2-butanone oxime as solvent 1. Place 0.5 g of each powder on the lower plate of a Hoover muller (manufactured by Toyo Seiki Co., Ltd.), add 1 mL of solvent 1, apply a load of 667 N, and knead until a uniform paste is formed. Then add 12 mL of solvent and mix. The obtained slurry was coated onto test paper, allowed to stand for 30 minutes, and then baked in air at 130°C for 30 minutes. The L, a, and b values ​​of the baked coating were measured using an SM-7 colorimeter (hereinafter referred to as the "colorimeter") manufactured by Suga Test Instruments Co., Ltd. The L, a, and b values ​​were also measured similarly for pigments in which 500 g / kg and 750 g / kg of each pigment were replaced with iron oxide black. The results are shown below. Figure 2 and Figure 3 When the obtained values ​​of a and b are set as a1 and b1 respectively, the chromaticity C is calculated by the following formula:

[0121] C=(a1 2 +b1 2 ) 1 / 2

[0122] The results are shown in Figure 4 .

[0123] [Coloring power]

[0124] Iron oxide pigments A through C, and for mixed pigment 2, 0.125 g of each pigment and 0.375 g of titanium dioxide were mixed to prepare a mixed powder. Meanwhile, 834 g / kg of ALUKIDIR (registered trademark) 4250 manufactured by DIC Corporation, 156 g / kg of xylene, and 10 g / kg of 2-butanone oxime were mixed as solvent 1. 0.5 g of each powder was placed on the lower plate of a Hoovermuller mold manufactured by Toyo Seiki Co., Ltd., and 11 mL of solvent 1 was added dropwise. A load of 667 N was applied, and the mixture was kneaded until a uniform paste was formed. Then, 12 mL of solvent 1 was added and mixed. The resulting paste was coated onto test paper, allowed to stand for 30 minutes, and then baked in air at 130°C for 30 minutes. The L, a, and b values ​​of the baked coating were measured using a colorimeter. The color difference ΔE between the measured values ​​of L, a, and b and white (L = 100, a = 0, b = 0) is taken as the tinting strength. When the measured values ​​of L, a, and b are set as L², a², and b² respectively, the tinting strength ΔE is calculated using the following formula:

[0125] ΔE={(L2-100) 2 +(a2-0) 2 +(b2-0) 2} 1 / 2

[0126] The results are shown in Table 4.

[0127] [Table 1]

[0128]

[0129] [Table 2]

[0130]

[0131] [Table 3]

[0132]

[0133] [Table 4]

[0134] Coloring force ΔE Iron oxide pigment A 55.50 Iron oxide pigment B 55.99 Iron oxide pigment C 53.03 Mixed Pigment 2 51.66

[0135] according to Figure 1 It is known that the iron oxide pigments of Examples 1 to 3 have a spinel structure, or a combination of spinel and corundum structures. Furthermore, according to... Figure 2 and Figure 3It is known that, when comparing the iron oxide pigment A of Example 1 with the same brightness (L value), its b value is greater than that of the mixed pigment 1 of Comparative Example 1. This iron oxide pigment has the advantage of easily producing yellow hues in areas of low brightness. Furthermore, it is known that the a and b values ​​of iron oxide pigments B and C of Examples 2 and 3 are both greater than those of mixed pigment 1. This iron oxide pigment has the advantage of easily producing a wide range of colors in areas of low brightness. Furthermore, according to... Figure 4 It can be seen that, when the iron oxide pigment used in any embodiment is compared with the same brightness (L value), it shows a large chromaticity compared with mixed pigment 1.

[0136] Based on the above results, it can be seen that the iron oxide pigment of the present invention has high a and / or b values ​​in the low brightness region, as well as high chromaticity, and also high tinting strength. Therefore, cosmetic compositions formulated with the iron oxide pigment of the present invention are suitable for use as cosmetics for dark skin tones.

[0137] Skin cosmetics are one of the main methods of this invention. Examples of formulations are shown below.

[0138] [Formula Example]

[0139] Formula 1: Light beige powder foundation

[0140] Composition and mixing ratio (g / kg)

[0141] (1) Iron oxide pigment A 9.4

[0142] (2) Iron oxide black pigment (BL-100HP manufactured by Titanium Industry; BL-100HP is also used for iron oxide black in the following formulation examples) 0.6

[0143] (3) Mica (PDM-1000 manufactured by Topy Industries Limited) 490

[0144] (4) Talc (Asada Flour Co., Ltd., JA-46R) 300

[0145] (5) Titanium oxide (Ishihara Sangyo Co., Ltd., C-50R) 100

[0146] (6) Oils {a mixture of CRODALAN SWL (manufactured by Croda International Plc), PHYTOSQUALAN (manufactured by Iwase Cosfa Co., Ltd.), ODO (manufactured by Nisshin OilliO Group, Ltd.), TIO (manufactured by Nisshin OilliO Group, Ltd.), and KF-56 (manufactured by Shin-Etsu Chemical Co., Ltd.) in a ratio of 4:4:3:3:6} 100

[0147] (Preparation method)

[0148] (1) and (2) were pre-mixed manually. The mixed pigments were then uniformly mixed with (3) through (6) using a Mitsui Miike Chemical Machinery FM-10B (hereinafter referred to as a "Henschel mixer"). The mixture was then pulverized using a hammer mill, filled into a mold, and compressed to obtain the target light beige powder foundation. The resulting light beige powder foundation has a smooth feel. Importantly, it provides a healthy look with a vibrant hue and a natural finish.

[0149] Formula 2: Beige-brown powder foundation

[0150] Composition and mixing ratio (g / kg)

[0151] (1) Iron oxide pigment B 248

[0152] (2) Iron Oxide Black 16

[0153] (3) Mica (PDM-1000 manufactured by Topy Industries Limited) 264

[0154] (4) Sericite 352

[0155] (5) Polydimethylsiloxane 120

[0156] (Preparation method)

[0157] Mix (1) and (2) manually beforehand, and then mix the mixed pigments with (3) through (5) using a Henschel mixer. Crush the mixture using a hammer mill, fill it into a mold, and compress it to obtain the target beige-toned powder foundation. The resulting beige-toned powder foundation has a smooth feel. Importantly, it provides a healthy look with a vibrant hue and a natural finish.

[0158] Formula 3: Dark brown powder foundation

[0159] Composition and mixing ratio (g / kg)

[0160] (1) Iron oxide pigment C 300

[0161] (2) Iron oxide black 300

[0162] (3) Mica (PDM-1000 manufactured by Topy Industries Limited) 300

[0163] (4) Oils {a mixture of CRODALAN SWL (manufactured by Croda International Plc), PHYTOSQUALAN (manufactured by Iwase Cosfa Co., Ltd.), ODO (manufactured by Nisshin OilliO Group, Ltd.), TIO (manufactured by Nisshin OilliO Group, Ltd.), and KF-56 (manufactured by Shin-Etsu Chemical Co., Ltd.) in a ratio of 4:4:3:3:6} 100

[0164] (Preparation method)

[0165] Mix (1) and (2) manually beforehand, then mix the pigments with (3) and (4) using a Henschel mixer. Crush the mixture using a hammer mill, fill it into a mold, and compress it to obtain the desired dark brown powder foundation. The resulting dark brown powder foundation has a smooth feel. Importantly, it provides a healthy look with a vibrant hue and a natural finish.

[0166] Formula 4 Stick Foundation

[0167] Composition and mixing ratio (g / kg)

[0168] (1) Cyclopentasiloxane 300

[0169] (2) Ethylhexyl methoxycinnamate 50

[0170] (3) Diisostearyl malate 40

[0171] (4) Candelilla wax 60

[0172] (5) Hydrogenated jojoba ester 40

[0173] (6) Hexadecyl dimethylsiloxane copolymer 20

[0174] (7) Sorbitan sesquiisostearate 5

[0175] (8) Hydrogenated polydimethylsiloxane treatment of iron oxide pigment A 25

[0176] (9) Hydrogenated polydimethylsiloxane-treated titanium dioxide 83

[0177] (10) Hydrogenated polydimethylsiloxane treated talc 60

[0178] (11) Methyl methacrylate crosspolymer (Matsumoto Yushi-Seiyaku Co., Ltd.) M-305) 40

[0179] (12) Purified water balance

[0180] (13) Sodium citrate 3

[0181] (14) Propylene glycol 30

[0182] (15) Glycerol 20

[0183] (Preparation method)

[0184] Powder components (8) to (11) were pre-mixed using a Henschel mixer. Oil phase components (1) to (7) were weighed in a container and heated to dissolve. Aqueous phase components (12) to (15) were weighed in another container and heated to dissolve. Powder components were added to the oil phase and evenly dispersed. Aqueous phase components were added and emulsified. After degassing, the mixture was poured into a mold and slowly cooled to room temperature to obtain the target stick foundation. The resulting stick foundation exhibited excellent adhesion and a dry feel. Importantly, it provided the user with a healthy appearance with vibrant colors and a natural finish.

[0185] Formula 5 W / O emulsified foundation

[0186] Composition and mixing ratio (g / kg)

[0187] (1) PEG-10 polydimethylsiloxane 20

[0188] (2) Polyglycerol ricinoleate-10 5

[0189] (3) Neopentyl glycol didecanoate 30

[0190] (4) Squalane 10

[0191] (5) Pentaerythritol tetraoctanoate 20

[0192] (6) Stearoyl inulin 10

[0193] (7) Ethylhexyl methoxycinnamate 40

[0194] (8) Balance of cyclopentasiloxane

[0195] (9) Hydrogenated polydimethylsiloxane-treated titanium dioxide 77

[0196] (10) Hydrogenated polydimethylsiloxane treated talc 57

[0197] (11) Hydrogenated polydimethylsiloxane-treated iron oxide pigment C 27

[0198] (12) Purified water 380

[0199] (13) 1,3-Butanediol 60

[0200] (14) Glycerol 10

[0201] (15) Sodium chloride 10

[0202] (16) Phenoxyethanol 5

[0203] (Preparation method)

[0204] In the oil phases (1) to (8), the powder phases (9) to (11), which have been pre-mixed using a Henschel mixer, are added and dispersed evenly in the mixer. In another container, the aqueous phases (12) to (16) are heated and dissolved. The aqueous phase is added to the oil phase containing the dispersed powder, emulsified, and then cooled to room temperature to obtain the target W / O emulsified foundation. The resulting W / O emulsified foundation spreads well and provides a dry feel. Importantly, it provides the user with a healthy look with vibrant colors and a natural finish.

[0205] Formula 6 O / W Emulsified Foundation

[0206] Composition and mixing ratio (g / kg)

[0207] (1) Stearic acid 10

[0208] (2) Isostearic acid 3

[0209] (3) Cetyl ethylhexanoate 40

[0210] (4) Liquid paraffin 70cs 110

[0211] (5) Stearyl alcohol polyether-10 20

[0212] (6) Cetyl alcohol 15

[0213] (7) Triethoxyoctylsilane treatment of talc 50

[0214] (8) Triethoxyoctylsilane treatment of iron oxide pigment A27

[0215] (9) Triethoxyoctylsilane treatment of titanium dioxide 75

[0216] (10) Triethanolamine 12

[0217] (11) Propylene glycol 50

[0218] (12) Xanthan Gum 2

[0219] (13) Purified water balance

[0220] (14) Phenoxyethanol 5

[0221] (Preparation method)

[0222] Add the mixed and pulverized (7) to (9) to the (1) to (6) mixtures, which have been heated and dissolved at 85°C, and disperse evenly. Slowly add this mixture to the (10) to (14) mixtures, which have been heated to 85°C, to emulsify. After stirring and cooling to room temperature, fill into a suitable container to obtain the target O / W emulsified foundation. The resulting O / W emulsified foundation has good spreadability and a dry feel. Importantly, it provides the user with a healthy look with vibrant colors and a natural finish.

[0223] Recipe 7 2-WAY Powder

[0224] Composition and mixing ratio (g / kg)

[0225] (1) Residual amount of polydimethylsiloxane treated talc

[0226] (2) Polydimethylsiloxane-treated titanium dioxide 100

[0227] (3) Polydimethylsiloxane treated mica 200

[0228] (4) Polydimethylsiloxane-treated sericite 360

[0229] (5) Nylon powder 100

[0230] (6) Polydimethylsiloxane-treated iron oxide red (R-516HP manufactured by titanium industry; R-516HP is also used for iron oxide red in the following formulations) 2

[0231] (7) Polydimethylsiloxane treatment of iron oxide pigment B 27

[0232] (8) Polydimethylsiloxane 1000cs 60

[0233] (9) Tridecyl isononanoate 30

[0234] (10) Squalane 30

[0235] (11) Tocopherol 1

[0236] (12) 1,3-Butanediol 10

[0237] (Preparation method)

[0238] Mix (1) to (7) using a Henschel mixer, then mix in (8) to (12) which have been heated and dissolved, pulverize using an atomizer, and press into shape on an aluminum dish to obtain the target 2-way foundation. The resulting 2-way foundation is smooth and has a refreshing feel. More importantly, it provides the user with a healthy look with vibrant colors and a natural finish.

[0239] Recipe 8 Oily Powder Compact

[0240] Composition and mixing ratio (g / kg)

[0241] (1) Residual amount of polydimethylsiloxane treated talc

[0242] (2) Polydimethylsiloxane-treated titanium dioxide 130

[0243] (3) Polydimethylsiloxane-treated sericite 280

[0244] (4) Polydimethylsiloxane treatment of iron oxide pigment A27

[0245] (5) Polydimethylsiloxane-treated iron oxide black 1

[0246] (6) Candelilla wax 10

[0247] (7) Carnauba wax 10

[0248] (8) Cerebrospinal fluid 15

[0249] (9) Cyclopentasiloxane 140

[0250] (10) Isononyl isononate 250

[0251] (11) Polyglycerol diisostearate 20

[0252] (12) Ethylhexyl methoxycinnamate 30

[0253] (Preparation method)

[0254] Powder components (1) to (5) are mixed using a Henschel mixer and pulverized evenly. Oil phase components (6) to (12) are heated and dissolved, then added to the powder components and stirred evenly. After degassing, the mixture is poured into the main body in a tray and slowly cooled to room temperature to obtain the target oily pressed powder. The resulting oily pressed powder has no greasy feel and provides a smooth application. More importantly, it provides users with a healthy look with vibrant colors and a natural finish.

[0255] Formula 9 Blush

[0256] Composition and mixing ratio (g / kg)

[0257] (1) Triethoxyoctylsilane treatment of talc 250

[0258] (2) Residual amount of sericite treated with triethoxyoctylsilane

[0259] (3) Stearic acid treated microparticle titanium dioxide (STV-455, manufactured in the titanium industry) 30

[0260] (4) Triethoxyoctylsilane treatment of titanium dioxide 18

[0261] (5) Triethoxyoctylsilane treatment of 0.5% iron oxide black

[0262] (6) Triethoxyoctylsilane treatment of iron oxide red 2

[0263] (7) Triethoxyoctylsilane treatment of iron oxide pigment B 8

[0264] (8) Ethylhexyl methoxycinnamate 30

[0265] (9) Ethylhexyl palmitate 50

[0266] (10) Appropriate amount of preservative

[0267] (11) Appropriate amount of antioxidants

[0268] (Preparation method)

[0269] Mix (1) to (7) using a Henschel mixer, in which (8) to (11) are mixed and dissolved by heating, and then pulverized using an atomizer. Press the mixture onto an aluminum dish to obtain the target blush. The resulting blush has excellent usability. More importantly, it provides the user with a healthy look with a vibrant tone and a natural finish.

[0270] Recipe 10: Pressed Powder

[0271] Composition and mixing ratio (g / kg)

[0272] (1) Talc balance

[0273] (2) Pigment-grade titanium dioxide 10

[0274] (3) AMIHOPE (registered trademark) LL 30

[0275] (4) PMMA (Matsumoto Microsphere S-100, 10 μm product manufactured by Matsumoto Yushi-Seiyaku Co., Ltd.) 80

[0276] (5) Appropriate amount of preservative

[0277] (6) Iron oxide pigment B 10

[0278] (7) Squalane 10

[0279] (8) Appropriate amount of preservative

[0280] (9) Appropriate amount of antioxidants

[0281] (10) Spices as needed

[0282] (Preparation method)

[0283] After mixing and pulverizing (1) to (7), the mixture is transferred to a HANIL Electric.Co.,Ltd. LAB.MIXER LM-110T, and (8) to (10) are added and stirred until homogeneous. The resulting mixture is then pulverized using a Tokyo Atomizer MFGCo.,Ltd. sample mill TASM-1 to fill the powder compact. The resulting powder compact provides the user with a healthy look with vibrant tones and a natural finish.

[0284] Cosmetics in liquid form are also one aspect of this invention. Examples of formulations are shown below.

[0285] Formula 11 Water-based eyeliner

[0286] Composition and mixing ratio (g / kg)

[0287] (1) Iron oxide black 50

[0288] (2) Iron oxide pigment C 25

[0289] (3) Purified water balance

[0290] (4) Decaglycerol lauryl ester 10

[0291] (5) Glycerol 60

[0292] (6) 100 g / kg carboxymethyl cellulose aqueous solution 180

[0293] (7) Phenoxyethanol 5

[0294] (8) Pentylene glycol 10

[0295] (9) Vinyl acetate resin emulsion (VINYBLAN (registered trademark) GV-5651 manufactured by Nissin Chemical Industry Co., Ltd.) 450

[0296] (Preparation method)

[0297] Weigh (1) to (3), and use a bead mill to finely disperse (1) and (2) in (3). In another container, weigh (4) to (8), add the pigment at 70°C and disperse evenly, cool to room temperature, and add (9) to obtain the target water-based eyeliner. The obtained water-based eyeliner has a bright brown hue and excellent feel.

[0298] Formula 12 Nail Polish

[0299] Composition and mixing ratio (g / kg)

[0300] (1) Nitrocellulose (viscosity 1 / 2 second) 100

[0301] (2) Modified alkyd resin 100

[0302] (3) Acetyl tributyl citrate 50

[0303] (4) Ethyl acetate 200

[0304] (5) 50 ml of ethanol

[0305] (6) Toluene balance

[0306] (7) Iron oxide pigment A 90

[0307] (8) Organically modified montmorillonite 30

[0308] (Preparation method)

[0309] Mix (7) with a portion of (2) and (3) and knead thoroughly. Add the remainder of (2) and (3), as well as (1), (4) through (6) and (8), and mix until homogeneous to obtain the target nail polish. The resulting nail polish has a vibrant color and excellent coverage.

[0310] Formula Example 13: One-time hair dye

[0311] Composition and mixing ratio (g / kg)

[0312] (1) Iron oxide particles A 50

[0313] (2) Red No. 202 10

[0314] (3) Polyvinyl alcohol 500 5

[0315] (4) Triethanolamine 6

[0316] (5) Ethyl acetate balance

[0317] (Preparation method)

[0318] Mix (3) to (5) using a Henschel mixer until the components are homogeneous. Then add (1) and (2) and continue mixing until the mixture is homogeneous to obtain the target primary hair dye. The resulting primary hair dye has a bright brown hue and no rough texture.

[0319] Cosmetics in solid form are also one aspect of this invention. Examples of formulations are shown below.

[0320] Formula Example 14: Imprinted Eyeshadow

[0321] Composition and mixing ratio (g / kg)

[0322] (1) Iron oxide pigment C 270

[0323] (2) Remaining amount of sericite

[0324] (3) Talc 149

[0325] (4) Mica Titanium (BASF: Flamenco Super Pearl 120C) 200

[0326] (5) Methylparaben 1

[0327] (6) Polydimethylsiloxane 1000cs 70

[0328] (7) Diisostearyl malate 30

[0329] (8) Isopropanol in appropriate amount

[0330] (Preparation method)

[0331] Mix and pulverize (1) through (5). Then, in another container, add the mixed (6) and (7) and stir to achieve a uniform consistency. Disperse the adjusted mixture in (8) to achieve a moderate viscosity, and compress and fill it into a suitable metal dish using a slurry filling machine. Dry at 40°C for 12 hours to obtain the target embossed eyeshadow. The resulting product exhibits a vibrant color, excellent adhesion, and a smooth feel.

[0332] Formula 15 Eyebrow Pencil

[0333] Composition and mixing ratio (g / kg)

[0334] (1) Iron oxide black 160

[0335] (2) Iron oxide pigment C 25

[0336] (3) Titanium oxide 45

[0337] (4) Talc balance

[0338] (5) Kaolin 150

[0339] (6) Japanese wax 200

[0340] (7) Stearic acid 100

[0341] (8) Beeswax 50

[0342] (9) Hydrogenated castor oil 50

[0343] (10) Vaseline 30

[0344] (11) Lanolin 30

[0345] (12) Squalane 30

[0346] (13) Appropriate amount of preservative

[0347] (14) Appropriate amount of antioxidants

[0348] (Preparation method)

[0349] Add the mixed and pulverized (1) to (5) to the heated and melted (6) to (14), mix and knead evenly with a three-roll mill, shape into a core, insert into wood to form a pencil shape, and obtain the target eyebrow pencil. The obtained eyebrow pencil has a bright color and a smooth feel.

[0350] Formula 16 Imprint Eyebrow Pencil

[0351] Composition and mixing ratio (g / kg)

[0352] (1) Titanium oxide 140

[0353] (2) Iron oxide black 140

[0354] (3) Iron oxide pigment C 25

[0355] (4) Ultramarine 5

[0356] (5) Mica balance

[0357] (6) Talc 100

[0358] (7) Lanolin wax 100

[0359] (8) Liquid paraffin 40

[0360] (9) Glycerol stearate 10

[0361] (10) Appropriate amount of preservative

[0362] (11) Appropriate amount of antioxidants

[0363] (Preparation method)

[0364] Add the mixed and pulverized (1) to (6) to the heated and melted (7) to (11) mixture, mix until homogeneous, compress and mold to obtain the target embossed eyebrow pencil. The obtained embossed eyebrow pencil has a bright color and excellent colorfastness.

[0365] Recipe 17: Pressed Powder

[0366] Composition and mixing ratio (g / kg)

[0367] (1) Hydrogenated polydimethylsiloxane treatment of talc residue

[0368] (2) Methyl methacrylate crosspolymer (Matsumoto Yushi-Seiyaku Co., Ltd.) M-305) 100

[0369] (3) Hydrogenated polydimethylsiloxane treated 500g of sericite

[0370] (4) Silicon dioxide (AGC Si-Tech Co., Ltd. manufactured SUNSPHERE (registered trademark) NP-30) 60

[0371] (5) Hydrogenated polydimethylsiloxane-treated titanium dioxide 55

[0372] (6) 0.5g of hydrogenated polydimethylsiloxane-treated iron oxide black.

[0373] (7) 0.5g of iron oxide red treated with hydrogenated polydimethylsiloxane.

[0374] (8) Hydrogenated polydimethylsiloxane treatment of iron oxide pigment B10

[0375] (9) Ethylhexyl methoxycinnamate 30

[0376] (10) Squalane 20

[0377] (11) Appropriate amount of preservative

[0378] (12) Antioxidant in appropriate amount

[0379] (Preparation method)

[0380] Powder components (1) to (8) are mixed and pulverized, then transferred to a Henschel mixer. Oil phase components (9) to (12) are added and stirred to achieve a uniform mixture. The mixture is then pulverized using an atomizer. It is pressed into shape on an aluminum dish to obtain the target powder compact. The resulting powder compact exhibits a vibrant color, excellent adhesion, and a dry feel.

[0381] Cosmetics in gel form are also one aspect of this invention. Examples of formulations are shown below.

[0382] Formula 18 Eyeshadow Cream

[0383] Composition and mixing ratio (g / kg)

[0384] (1) Talc 100

[0385] (2) Kaolin 50

[0386] (3) Iron oxide pigment C 45

[0387] (4) Stearic acid 30

[0388] (5) Isopropyl myristate 80

[0389] (6) Liquid paraffin 70cs 50

[0390] (7) Propylene glycol laurate 30

[0391] (8) Tocopherol 0.5

[0392] (9) Purified water balance

[0393] (10) Concentrated glycerol 50

[0394] (11) 1,3-Butanediol 10

[0395] (12) Methylparaben 2

[0396] (13) Triethanolamine 12

[0397] (14) EDTA-3Na 0.5

[0398] (Preparation method)

[0399] Add the mixed and pulverized (1) to (3) to (9) to (15) and stir to mix. Add (4) to (8) which have been heated and dissolved at 70°C to 80°C, emulsify, stir and cool to obtain the target eyeshadow cream. The obtained eyeshadow cream has a bright color, smooth application, and excellent adhesion.

[0400] Formula 19 Oily Eyeliner

[0401] Composition and mixing ratio (g / kg)

[0402] (1) Isostearyl dextrin (manufactured by Chiba Flour Milling Co., Ltd., UNIFILMA (registered trademark) HVY) 50

[0403] (2) Microcrystalline wax 50

[0404] (3) Dextrin palmitate 100

[0405] (4) Diisostearyl malate 100

[0406] (5) Balance of isododecane

[0407] (6) Polydimethylsiloxane-treated iron oxide black 245

[0408] (7) Polydimethylsiloxane treatment of iron oxide pigment B 25

[0409] (8) Mica 200

[0410] (Preparation method)

[0411] Weigh (1) to (5) and heat and mix until homogeneous. Then add (6) to (8) which have been mixed and pulverized, heat and mix until homogeneous, cool to 40°C, fill into a suitable container, and cool to room temperature to obtain the target oily eyeliner. The obtained oily eyeliner has a bright color and excellent stretch.

[0412] Formula 20 Emulsified Mascara

[0413] Composition and mixing ratio (g / kg)

[0414] (1) Purified water balance

[0415] (2) Polyvinylpyrrolidone 20

[0416] (3) Propylene glycol 20

[0417] (4) 1% aqueous solution of cationic cellulose 100

[0418] (5) Bentonite 5

[0419] (6) Triethanolamine 17

[0420] (7) Methylparaben 2

[0421] (8) Talc 40

[0422] (9) Iron oxide black 90

[0423] (10) Iron oxide pigment C 25

[0424] (11) Carnauba wax 55

[0425] (12) Beeswax 90

[0426] (13) Stearic acid 20

[0427] (14) Self-emulsifying glyceryl stearate 20

[0428] (15) Propylene glycol stearate 20

[0429] (16) Hydrogenated polyisobutylene 20

[0430] (17) Cyclopentasiloxane 40

[0431] (18) Acrylic resin emulsion (DAITOSOL (registered trademark) 5000AD manufactured by Daito Chemical Industry) 200

[0432] (Preparation method)

[0433] Add (8) to (10), which have been pre-mixed using a Henschel mixer, to (1) to (7), and disperse evenly using a mixer. Add (11) to (17), which have been dissolved by heating, and emulsify. Cool to 40°C, add (18), and cool to room temperature to obtain the target emulsified mascara. The resulting emulsified mascara has a vibrant color and excellent feel.

[0434] Formula 21 Oil-based mascara

[0435] Composition and mixing ratio (g / kg)

[0436] (1) Hydrogenated polyisobutylene 20

[0437] (2) Balance of isododecane

[0438] (3) 50g of isostearic acid dextrin

[0439] (4) Dextrin palmitate 150

[0440] (5) Microcrystalline wax 20

[0441] (6) Polyethylene wax 30

[0442] (7) Propylparaben

[0443] (8) Talc 60

[0444] (9) Iron oxide black 55

[0445] (10) Iron oxide pigment B10

[0446] (11) Dimethylsilylated silica 5

[0447] (12) Nylon fiber (cosmaterials 5D-8MM) 10

[0448] (Preparation method)

[0449] In the heated and dissolved (1) to (7), the pre-mixed and pulverized (8) to (10) and (11) are mixed. After cooling, (12) is evenly dispersed to obtain an oily mascara. The resulting oily mascara has a bright color and excellent adhesion and usability.

[0450] Formula 22 Lipstick

[0451] Composition and mixing ratio (g / kg)

[0452] (1) Cerebrolysin 100

[0453] (2) Microcrystalline wax 32

[0454] (3) Paraffin 50

[0455] (4) Pentaerythritol tetraisostearate 200

[0456] (5) Diisostearyl malate 150

[0457] (6) Hydrogenated polydecene 100

[0458] (7) Vaseline 100

[0459] (8) Balance of polyglycerol-2-triisostearate

[0460] (9) Dimethyl silicone oil 1

[0461] (10) Propylparaben

[0462] (11) Red No. 202 4

[0463] (12) Iron oxide pigment A 18

[0464] (13) Titanium oxide 3

[0465] (14) Silicon dioxide 10

[0466] (Preparation method)

[0467] Weigh (1) to (14) and heat to mix. After uniform dispersion using a three-roll mill, heat and stir evenly. After degassing, pour the heated mixture into a mold and cool rapidly. Install in a suitable container to obtain the target lipstick. The obtained lipstick exhibits a unique hue with a bright red color.

[0468] Formula 23 Lipstick

[0469] Composition and mixing ratio (g / kg)

[0470] (1) (palmitic acid / ethylhexanoic acid) dextrin 50

[0471] (2) Pentaerythritol tetraisostearate 120

[0472] (3) Hydrogenated polydecene 100

[0473] (4) Balance of polyglycerol-2-triisostearate

[0474] (5) Pentaerythritol hydrogenated rosin ester 100

[0475] (6) Octyl dodecyl isostearate 100

[0476] (7) Glyceryl behenate / eicosanoate 20

[0477] (8) Dimethylsilylated silica 10

[0478] (9) Propylparaben

[0479] (10) Hydrogenated polyisobutylene 350

[0480] (11) Organosilicon-treated iron oxide pigment B10

[0481] (12) Red No. 202 4

[0482] (Preparation method)

[0483] Heat and mix (1) through (12) until homogeneous. After degassing, fill into a suitable container and slowly cool to room temperature to obtain the target lipstick. The resulting lipstick has a unique, vibrant red hue.

[0484] Formula 24 Lip Gloss

[0485] Composition and mixing ratio (g / kg)

[0486] (1) Dextrin palmitate 100

[0487] (2) Diisostearyl malate 450

[0488] (3) Liquid paraffin balance

[0489] (4) Preservative 1

[0490] (5) Antioxidant 1

[0491] (6) Iron oxide pigment A 5

[0492] (7) Red 202 No. 1

[0493] (Preparation method)

[0494] Heat (1) to (5) to 85°C to dissolve them evenly, then add (6) to (7) and disperse them evenly. Fill the container at high temperature and cool rapidly to room temperature to obtain the target lip gloss. The resulting lip gloss has a unique shade of bright red.

[0495] The cosmetic composition of the present invention can also be used in applications such as washing the face and removing dirt from the body, and brushing teeth.

[0496] Formula 25 Shower Gel

[0497] Composition and mixing ratio (g / kg)

[0498] (1) Lauric acid 115

[0499] (2) Myristic acid 77

[0500] (3) Palmitic acid 48

[0501] (4) Potassium hydroxide (purity 480g / kg) 122

[0502] (5) Lauryl hydroxysulfonyl betaine 100

[0503] (6) Coconut oil monoethanolamide 10

[0504] (7) 20% ethylene distearate

[0505] (8) Purified water balance

[0506] (9) EDTA-4Na 1

[0507] (10) Iron oxide pigment B10

[0508] (11) Talc 4

[0509] (Preparation method)

[0510] Heat (1) to (3) from 70°C to 80°C to dissolve them. Then, slowly add (4) to saponify. At the end of saponification, add the remaining (5) to (9) and stir until homogeneous. Cool to 40°C, then add the mixed and crushed (10) and (11), stirring and cooling to room temperature to obtain the target shower gel. The resulting shower gel has a bright brown hue.

[0511] Formula 26 Foaming Cleanser

[0512] Composition and mixing ratio (g / kg)

[0513] (1) Stearic acid 170

[0514] (2) Myristic acid 70

[0515] (3) Lauric acid 30

[0516] (4) Potassium hydroxide (purity 480g / kg) 120

[0517] (5) PEG-60 glyceryl diisostearate 30

[0518] (6) Glyceryl stearate 20

[0519] (7) Sorbitol 80

[0520] (8) PEG1500 100

[0521] (9) Cocamidopropyl betaine 50

[0522] (10) Glycerol 180

[0523] (11) EDTA-4Na 1

[0524] (12) Purified water balance

[0525] (13) Pentylene glycol 15

[0526] (14) Iron oxide pigment C 3

[0527] (15) Talc 6

[0528] (Preparation method)

[0529] Heat (1) to (3) from 70°C to 80°C to dissolve them. Then, slowly add (4) to saponify. At the end of saponification, add the remaining (5) to (13) and stir until homogeneous. Cool to 40°C, then add the mixed and crushed (14) and (15) while stirring and cooling to room temperature to obtain the target foam cleanser. The resulting foam cleanser has a bright brown hue.

[0530] Formula 27 Cleansing Powder

[0531] Composition and mixing ratio (g / kg)

[0532] (1) Iron oxide pigment A 3

[0533] (2) Talc 200

[0534] (3) Lauric acid 50

[0535] (4) Mannitol balance

[0536] (5) Potassium myristate 300

[0537] (6) 100g of glucose

[0538] (7) Potassium myristoyl glutamate 20

[0539] (8) Sodium methyl cocoyl taurate 30

[0540] (9) Betaine 10

[0541] (10) TANAKURA CLAY (registered trademark) 50

[0542] (11) Guar gum hydroxypropyltrimethylammonium chloride 5

[0543] (12) Pentylene glycol 10

[0544] (Preparation method)

[0545] Mix (1) to (12) evenly using a Henschel mixer to obtain the target cleansing powder. The obtained cleansing powder has a bright brown hue.

[0546] Formula 28 Solid Soap

[0547] Composition and mixing ratio (g / kg)

[0548] (1) Alkali metal salts of fatty acids 945

[0549] (Lauryl acid 380g / kg, myristic acid 370g / kg, palmitic acid 150g / kg, stearic acid 100g / kg) (Potassium:Sodium = 1:5)

[0550] (2) Cocamidopropyl betaine 30

[0551] (3) Glycerol 20

[0552] (4) Iron oxide pigment A 5

[0553] (Preparation method)

[0554] (1) is heated to dissolve, and (2) through (4) are added and mixed. The mixture is then homogenized using a three-roll mill. Next, the resulting mixture is kneaded and compressed using an extruder, extruded into rods, and then shaped using a forging machine to obtain the target solid soap. The obtained solid soap exhibits a bright brown hue.

[0555] Formula 29 Bath Salt Powder

[0556] Composition and mixing ratio (g / kg)

[0557] (1) Sodium sulfate 860

[0558] (2) Remaining sodium bicarbonate

[0559] (3) Monosodium glutamate 20

[0560] (4) Silicon dioxide (manufactured by AGC Si-Tech Co., Ltd., SUNSPHERE (registered trademark) H-52) 10

[0561] (5) Iron oxide pigment A 5

[0562] (6) Vanillyl alcohol butyl ether 2

[0563] (7) Capsicum extract 1

[0564] (Preparation method)

[0565] (1) to (7) were mixed evenly using a Henschel mixer to obtain the target bath salt powder. When the obtained bath salt powder was used, the bath water exhibited a bright brown hue.

[0566] Formula 30 Peel-off Mask

[0567] Composition and mixing ratio (g / kg)

[0568] (1) PEG1500 80

[0569] (2) PEG / PPG-25 / 30 copolymer 60

[0570] (3) Xanthan Gum 2

[0571] (4) Sodium citrate 3

[0572] (5) Citric acid 1

[0573] (6) Purified water balance

[0574] (7) Polyvinyl alcohol 100

[0575] (8) Polysorbate-80 2

[0576] (9) Silicon dioxide (manufactured by AGC Si-Tech Co., Ltd., SUNSPHERE (registered trademark) H-51) 40

[0577] (10) Talc 80

[0578] (11) Iron oxide pigment C10

[0579] (12) Alkyl acrylate copolymer emulsion 50

[0580] (13) Methylparaben 2

[0581] (14) Ethanol 80

[0582] (Preparation method)

[0583] In the heated and dissolved (1) to (8), the mixed and pulverized (9) to (11) are added, and after being evenly dispersed, the mixture is cooled to 40°C. Then, (12) to (14) are added, and the mixture is stirred and cooled to room temperature to prepare the target peel-off mask. The resulting peel-off mask exhibits a unique and vibrant color.

[0584] Formula 31 Toothpaste

[0585] Composition and mixing ratio (g / kg)

[0586] (1) Calcium carbonate 290

[0587] (2) Iron oxide pigment A 5

[0588] (3) Red No. 202 5

[0589] (4) Sorbitol solution 35

[0590] (5) Glycerol 35

[0591] (6) Guar gum 30

[0592] (7) 600 ml of distilled water

[0593] (Preparation method)

[0594] Weigh (1) to (3) and add to (7), then stir for 5 minutes using Tokushu Kiki ROBOMICS fMODEL. Continue stirring while adding (4) to (6), and stop stirring if the viscosity of the mixture increases. The resulting toothpaste has a bright color and achieves both sufficient viscosity for placement in the tube and sufficient fluidity for the abrasive to penetrate the interdental spaces of the teeth.

Claims

1. An iron oxide pigment for use in cosmetic compositions, having a spinel structure, or a combination of spinel and corundum structure, wherein the iron oxide pigment has an Fe content of 680 g / kg or more and 702 g / kg or less, an FeO content of 20 g / kg or less, an Fe2O3 content of 939 g / kg or more and 991 g / kg or less, and the total content of FeO and Fe2O3 is 968 g / kg or more and 991 g / kg or less. The primary particles of the iron oxide pigment have an average minor axis length of ≥100nm and ≤300nm, and a BET specific surface area of ​​3.0m². 2 / g or more and 15.0m 2 The residue when passing through a sieve with an opening of 45 μm is less than 1.0 g / kg. In X-ray diffraction measurements, when the integrated intensity of the diffraction lines on the (311) plane of spinel-structured iron oxide, which appears at a diffraction angle of 35.10° or higher and 36.10° or lower, is set to 100.00, the integrated intensity of the diffraction lines on the (104) plane of corundum-structured iron oxide, which appears at a diffraction angle of 32.60° or higher and 33.60° or lower, is 5.0 or lower.

2. The iron oxide pigment according to claim 1, wherein, Pb is below 10 mg / kg, As is below 3 mg / kg, Hg is below 1 mg / kg, Cd is below 1 mg / kg, Zn is below 100 mg / kg, Ba is below 50 mg / kg, Cr is below 100 mg / kg, Cu is below 50 mg / kg, and Ni is below 200 mg / kg.

3. The iron oxide pigment according to claim 1 or 2, wherein the oil absorption is more than 20g / 100g and less than 50g / 100g.

4. A cosmetic composition comprising an iron oxide pigment according to any one of claims 1 to 3.

5. The cosmetic composition according to claim 4, wherein it is a skin cosmetic.

6. The cosmetic composition according to claim 4 or 5, wherein it is a liquid cosmetic.

7. The cosmetic composition according to claim 4 or 5, wherein it is a solid cosmetic.

8. The cosmetic composition according to claim 4 or 5, wherein it is a gel-like cosmetic.

9. The cosmetic composition according to claim 4 or 5, used for the purpose of reproducing a dark color.

Images