Iron oxide pigment for cosmetic composition and cosmetic composition containing iron oxide pigment

Abstract

To provide an iron oxide pigment to be blended in a cosmetic composition, the iron oxide pigment exhibiting a large "a" value and / or "b" value and a high chroma even in areas of low luminance, and having high coloring power.SOLUTION: An iron oxide pigment for a cosmetic composition comprises a spinel structure or a combination of a spinel structure and a corundum structure and has an elemental Fe content of 680-702 g / kg inclusive, an FeO content of 30 g / kg or less, and an Fe2O3 content of 939 g / kg or more, with a total content of FeO and Fe2O3 being 968 g / kg or more.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an iron oxide pigment for cosmetic compositions and to a cosmetic composition containing the iron oxide pigment. The iron oxide pigment of the present invention is particularly suitable for use in cosmetic compositions mainly for the skin, which are matched to dark colors. [Background technology]

[0002] Currently, the environment surrounding cosmetics is undergoing major changes. In the past, there were only a limited number of countries and regions with people who had the economic power to purchase industrially produced cosmetics, and cosmetics that matched the physical characteristics and values ​​of the main members of those countries and regions were what the market wanted. However, in recent years, due to changes in the global economy and the demographic structure of each country, the number of countries and regions with economically powerful people has expanded more than ever before, and there is a demand for a variety of cosmetics that has never been seen before. In the field of skin cosmetics, there is a great need for cosmetics that match skin with low brightness, or so-called dark skin, which was not considered important until now.

[0003] Pigments mainly composed of iron oxide can be produced in various colors such as red, yellow, and black by oxidation and reduction, have excellent coloring power, and are less harmful to the human body, so they are widely used as pigments for cosmetics, including in the field of skin cosmetics. In the examples of JP 2014-101298 A (Patent Document 1), it is described that an aqueous dispersion for brown cosmetics is produced by appropriately combining red iron oxide or yellow iron oxide with carbon black, etc., and that a pen-type eyeliner is produced using the dispersion. Patent Document 1 describes that by using a specific fine particle iron oxide as the iron oxide, separation or sedimentation of the pigment is not observed over time, and clogging does not occur in a pen-type container. However, when brown is reproduced by mixing pigments of various shades as in Patent Document 1, the components usually separate during storage due to the difference in the physical properties of each pigment (hereinafter, this phenomenon will be referred to as "color separation"), making it difficult to use as a cosmetic. In addition, Patent Document 1 does not describe the coloring power of the pigment.

[0004] Japanese Patent Laid-Open Publication No. 2-145506 (Patent Document 2) describes a brown-colored liquid cosmetic composition that is composed of at least black iron oxide oxidized by an oxidizing agent and water, and describes that by oxidizing black iron oxide to the desired brown color and using it as a coloring agent for the liquid cosmetic composition, color separation does not occur. Patent Document 2 also describes that this brown-colored liquid cosmetic composition can be used for eyeliner and the like.

[0005] On the other hand, when used as a skin cosmetic, strict adjustment of the color is required compared to when used as an eyeliner, etc. Although skin cosmetics need to produce a vivid and healthy appearance, when there is a large difference in color from the surrounding skin, the reflection of light may give an unnatural impression. In conventional cosmetics, subtle color adjustments have been made by blending a color tone adjuster. When the desired color is in a high brightness area, it is possible to adjust the color by blending a color tone adjuster. However, in areas with low brightness such as dark skin, the saturation is also low, so it is difficult to adjust subtle colors by blending a color tone adjuster, and it is also difficult to produce vividness.

[0006] In addition, since skin cosmetics are applied over a wide area, there is a strong demand for a good feel and ease of use. If the tinting power of the iron oxide pigment is low, the pigment must be blended in a large amount in the cosmetic composition, which causes the customer to feel a powdery feel when using the cosmetic, and also makes it difficult to spread the cosmetic over a wide area.

[0007] Skin cosmetics that match dark colors should have high chroma even in low lightness areas, and it is desirable that the pigments they contain have high coloring power. The brown liquid cosmetic in Reference 2 does not mention chroma or coloring power of pigments in low lightness areas. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2014-101298 A [Patent Document 2] Japanese Patent Application Publication No. 2-145506 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention provides an iron oxide pigment for cosmetic compositions that exhibits high chroma even in the low lightness range and has high pigment tinting power. The iron oxide pigment having the above characteristics is particularly suitable for use in cosmetic compositions for skin that are matched to dark colors. [Means for solving the problem]

[0010] The inventors focused on the composition of iron oxide pigments to be blended into cosmetics, and as a result of extensive investigation, they discovered that an iron oxide pigment having a spinel structure or a spinel structure and a corundum structure, in which the Fe content is 680 g / kg or more and 702 g / kg or less, the FeO content is 30 g / kg or less, the Fe2O3 content is 939 g / kg or more, and the total content of FeO and Fe2O3 is 968 g / kg or more, exhibits high chroma even in a low lightness range and further has high tinting power when blended into a cosmetic composition.

[0011] Iron oxide pigments for use in the cosmetic compositions of the present invention and cosmetic compositions include, but are not limited to: [1] An iron oxide pigment for a cosmetic composition, which has a spinel structure or a spinel structure and a corundum structure, and has an Fe element 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 content of FeO and Fe2O3 of 968 g / kg or more. [2] The iron oxide pigment according to [1], having a Pb content of 10 mg / kg or less, an As content of 3 mg / kg or less, an Hg content of 1 mg / kg or less, a Cd content of 1 mg / kg or less, a Zn content of 100 mg / kg or less, a Ba content of 50 mg / kg or less, a Cr content of 100 mg / kg or less, a Cu content of 50 mg / kg or less, and a Ni content of 200 mg / kg or less. [3] The iron oxide pigment according to [1] or [2], in which, in X-ray diffraction measurement, the integrated intensity of the diffraction line from the (104) plane of the corundum structure iron oxide, which appears at a diffraction angle of 32.60° to 33.60°, is 10.0 or less, when the integrated intensity of the diffraction line from the (311) plane of the spinel structure iron oxide, which appears at a diffraction angle of 35.10° to 36.10°, is taken as 100.00. [4] The iron oxide pigment according to any one of [1] to [3], wherein the average minor axis length of the primary particles is 50 nm or more and 500 nm or less. [5] BET specific surface area is 2.0m 2 / g or more 25.0m 2 1. The iron oxide pigment according to any one of [1] to [4], having a molecular weight of 1.0 g / kg or less, a bulk density of 70 g / mL or less, and a residue when passed through a sieve having an opening of 45 μm or less. [6] The iron oxide pigment according to any one of [1] to [5], having an oil absorption of 20 g / 100 g or more and 50 g / 100 g or less. [7] A cosmetic composition comprising the iron oxide pigment according to any one of [1] to [6]. [8] The cosmetic composition according to [7], which is a skin cosmetic. [9] The cosmetic composition according to [7] or [8], which is a liquid cosmetic.

[10] The cosmetic composition according to [7] or [8], which is a solid cosmetic composition.

[11] The cosmetic composition according to [7] or [8], which is a gel-type cosmetic composition.

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

[11] , which is used for the purpose of reproducing dark colors. Effect of the Invention

[0012] When the iron oxide pigment of the present invention is blended in a cosmetic composition, it exhibits a large a value and / or b value, and chroma, even in the region of low lightness. It also has a large tinting power. Due to these characteristics, it can be said that it is particularly suitable for use as a colorant in skin cosmetics that match dark skin tones. Furthermore, when blended in a cosmetic composition, the iron oxide pigment of the present invention has a smooth feel and is easy to apply over a wide area.

[0013] In addition, the cosmetic composition obtained by blending the iron oxide pigment of the present invention has properties such as being easy to produce and posing little risk to the health of users. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 shows the results of X-ray diffraction measurement of the iron oxide pigment for use in the cosmetic composition of the present invention. [Diagram 2] FIG. 2 shows the relationship between the brightness and the a value of the cosmetic composition obtained according to the present invention. [Diagram 3] FIG. 3 shows the relationship between the brightness and the b value of the cosmetic composition obtained according to the present invention. [Figure 4] FIG. 4 shows the relationship between lightness and chroma of the cosmetic composition obtained according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The iron oxide pigment to be blended in the cosmetic composition of the present invention must have an Fe element content of 680 g / kg or more and 702 g / kg or less. Furthermore, the FeO content is 30 g / kg or less, the Fe2O3 content is 939 g / kg or more, and the total content of FeO and Fe2O3 is 968 g / kg or more. In the present invention, in order to exhibit a brownish color with high chroma, the contents of Fe element, FeO, and Fe2O3 must be within the above ranges. If the FeO content is more than 30 g / kg or the element Fe content is more than 702 g / kg, the cosmetic composition containing the pigment will have a dark color with low chroma. If the Fe element content in the pigment is less than 680 g / kg, if the Fe2O3 content is less than 939 g / kg, or if the total content of FeO and Fe2O3 is less than 962 g / kg, the resulting cosmetic composition will have a dull color and low chroma. More preferably, the Fe element 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 sum of the FeO and Fe2O3 contents is 970 g / kg or more.

[0016] The iron oxide pigment to be blended in the cosmetic composition of the present invention preferably has a spinel structure or a spinel structure and a corundum structure. When the iron oxide pigment has a spinel structure and a corundum structure, it is preferable that the intensity of the diffraction line derived from the corundum structure obtained by X-ray diffraction measurement is small. Specifically, when the integrated intensity of the diffraction line of the (311) plane of the spinel structure iron oxide appearing at a diffraction angle of 35.10° to 36.10° is taken as 100.00, it is preferable that the integrated intensity of the diffraction line of the (104) plane of the corundum structure iron oxide appearing at a diffraction angle of 32.60° to 33.60° is 10.0 or less. When the diffraction line intensity of the corundum structure is large, the brightness of the obtained cosmetic composition becomes large, making it difficult to realize the desired color. More preferably, the integrated intensity of the diffraction line derived from the corundum structure is 7.0 or less, and even more preferably 5.0 or less.

[0017] The iron oxide pigment to be blended in the cosmetic composition of the present invention preferably has a small heavy metal content. Specifically, it is preferable that the pigment contains 10 mg / kg or less of Pb, 3 mg / kg or less of As, 1 mg / kg or less of Hg, 1 mg / kg or less of Cd, 100 mg / kg or less of Zn, 50 mg / kg or less of Ba, 100 mg / kg or less of Cr, 50 mg / kg or less of Cu, and 200 mg / kg or less of Ni. By reducing the content of oxides and salts of heavy metals, it is possible to suppress the scattering and absorption of light caused by oxides and salts, and to suppress the decrease in saturation. In addition, from the viewpoint of use as a cosmetic, it is preferable that the content of heavy metals is small. In particular, in recent years, consumers have become strict about the safety of cosmetics, and regulations on the content of heavy metals are being strengthened in many countries. By reducing the content of heavy metals, it is possible to avoid risks such as review of sales plans due to strengthened regulations and the occurrence of complaints from consumers. The heavy metal contents are more preferably 2 mg / kg or less for Pb, 2 mg / kg or less for As, 1 mg / kg or less for Hg, 1 mg / kg or less for Cd, 20 mg / kg or less for Zn, 5 mg / kg or less for Ba, 20 mg / kg or less for Cr, 10 mg / kg or less for Cu, and 5 mg / kg or less for Ni.

[0018] The iron oxide pigment to be blended in the cosmetic composition of the present invention desirably has an average minor axis length of primary particles of 50 nm or more and 500 nm or less. If the average minor axis length is 50 nm or more, the chroma tends to be high, and if the average minor axis length is 500 nm or less, the coloring power tends to be high. More preferably, the average minor axis length is 100 nm or more and 350 nm or less, and even more preferably, the average minor axis length is 100 nm or more and 300 nm or less. 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, but a ratio of about 1 to 200 is generally used.

[0019] The average minor axis length and average major axis length of the primary particles of the iron oxide pigment can be determined, for example, by observing about 100 to 500 primary particles of the pigment using a transmission electron microscope and calculating the average value.

[0020] The iron oxide pigment to be blended in the cosmetic composition of the present invention has a specific surface area measured by the BET method (hereinafter referred to as "BET specific surface area") of 2.0 m 2 / g or more 25.0m 2 / g or less. BET specific surface area is 2.0m 2 If the BET specific surface area is 25.0 m / g or more, the coloring power tends to be large. 2 When the BET specific surface area is 3.0 m / g or less, the generation of aggregates is suppressed and a uniform feel is easily obtained. 2 / g or more 20.0m 2 / g or less, more preferably 4.0m 2 / g or more 15.0m 2 / g or less, more preferably 5.0m 2 / g or more 14.0m 2 / g or less.

[0021] The bulk density of the iron oxide pigment to be blended in the cosmetic composition of the present invention is desirably 70 g / mL or less. If the bulk density is 70 g / mL or less, the chroma tends to be high. The bulk density is preferably 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.

[0022] The bulk density can be measured by a method in accordance with JIS K5101-12-1, for example, as described in the Examples section. The iron oxide pigment to be blended in the cosmetic composition of the present invention desirably has a residue of 1.0 g / kg or less when passed through a sieve with an opening of 45 μm. If the sieve residue is 1.0 g / kg or less, there will be few pigment clumps, which will tend to reduce the unpleasant tingling sensation when the cosmetic composition is used. More preferably, the sieve residue is 0.5 g / kg or less, and even more preferably 0.3 g / kg or less.

[0023] The sieve residue can be measured by a method in accordance with JIS K5101-14-1, for example, as described in the Examples section. The iron oxide pigment to be blended in the cosmetic composition of the present invention desirably has an oil absorption of 20 g / 100 g or more and 50 g / 100 g or less. When the oil absorption is 50 g / 100 g or less, the oiliness of the cosmetic composition is reduced, and the unpleasant feeling caused by the oiliness when using the cosmetic composition is easily reduced. In addition, when the oil absorption is 20 g / 100 g or more, the cosmetic composition can be prevented from being ruined by sebum. More preferably, the oil absorption is 25 g / 100 g or more and 45 g / 100 g or less.

[0024] The oil absorption can be measured by a method in accordance with JIS K5101-13-2, for example, as described in the Examples section. The method for producing the iron oxide pigment to be blended in the cosmetic composition of the present invention is not particularly limited. In general, the iron oxide pigment can be produced by a method in which yellow iron oxide is dehydrated, reduced, and then oxidized, or by a method in which black iron oxide is oxidized.

[0025] Here, yellow iron oxide is generally made of an iron oxide called goethite, which is represented by the chemical formula α-FeOOH. Although there are differences depending on the observer and the environment, it generally appears yellow, or close to yellow, as specified by the JIS common name. Black iron oxide is generally made of an iron oxide called magnetite, which is represented by the chemical formula Fe3O4. Although there are differences depending on the observer and the environment, it generally appears to be close to black, as specified by the JIS common name.

[0026] Yellow iron oxide and black iron oxide can be synthesized using known techniques. For example, yellow iron oxide can be produced by neutralizing an aqueous solution of a divalent iron salt with an alkali while keeping the temperature at a constant range of 20°C to 65°C, oxidizing with an oxygen-containing gas, stirring and aging, mixing the resulting solution with an aqueous solution of a divalent iron salt, neutralizing the solution by adding an alkali, oxidizing with an oxygen-containing gas, filtering and drying. Black iron oxide can be produced by neutralizing an aqueous solution of a divalent iron salt with an alkali hydroxide to generate a ferrous hydroxide precipitate, and oxidizing the solution by blowing air into the solution while controlling the pH and temperature of the solution. In these production methods, the composition and particle size of the obtained iron oxide particles can be controlled by controlling the pH of the solution and the oxidation time.

[0027] When obtaining an iron oxide pigment to be blended in the cosmetic composition of the present invention from yellow iron oxide, it can be obtained by dehydrating, reducing, and further oxidizing. One example is a method in which yellow iron oxide is dehydrated, the product is reduced, and then oxidized. For example, but not limited to, an iron oxide pigment suitable for the present invention can be obtained by calcining yellow iron oxide in air at 200°C, calcining the product in a hydrogen atmosphere at 300°C, and further calcining in air at 200°C. A kiln is generally used for both calcinations, and it is preferable to perform the calcination while rotating the kiln. The reduction is not limited to a hydrogen atmosphere, and an organic substance or other reducing gas may be used.

[0028] When obtaining an iron oxide pigment to be blended in the cosmetic composition of the present invention from black iron oxide, the iron oxide pigment can be obtained by oxidizing black iron oxide. Specifically, the iron oxide pigment suitable for the present invention can be obtained by calcining black iron oxide in air. There are no limitations on the number of times or time of calcination, and calcination may be carried out in multiple steps. In addition, the temperature may be changed during the calcination.

[0029] The oxidation of black iron oxide may be carried out in water. Specifically, black iron oxide particles are dispersed in water, and then brought into contact with air or an oxidizing agent is added to obtain black iron oxide. There is no particular limitation on the method of bringing the particles into contact with air, but a method of blowing air into a reaction tank is common. There is no particular limitation on the oxidizing agent, and hydrogen peroxide, for example, can be suitably used. There is no limitation on the liquid temperature, but a temperature of 60°C or higher is generally preferred from an industrial perspective since the oxidation rate is high, and a temperature of 90°C or lower is also preferred from the standpoint of safety since boiling does not occur.

[0030] The iron oxide pigment to be incorporated in the cosmetic composition of the present invention may be obtained by a method other than the above-mentioned method. For example, the iron oxide pigment for the cosmetic composition of the present invention can be produced by referring to a method described in JP-A-11-092148, in which an iron material is heated and oxidized, and then the iron oxide is peeled off from the iron material to separate and recover maghemite (γ-Fe2O3). In addition, the iron oxide pigment for the cosmetic composition of the present invention can be produced by referring to a method described in JP-A-2000-336496, in which a voltage is applied to an electrolyte containing iron ions, the precipitated substance is oxidized, and further heated to obtain ultrafine maghemite particles. However, a production method that does not involve yellow iron oxide or black iron oxide generally requires special equipment and environment, and tends to be expensive.

[0031] The iron oxide pigment to be blended in the cosmetic composition of the present invention may have an inorganic coating layer such as a hydrous oxide or oxide of metals such as aluminum, silicon, zinc, titanium, zirconium, iron, cerium, and tin on at least a part of the surface of the pigment particles, for example, for the purpose of improving the dispersion stability and durability in a dispersion medium when producing the cosmetic composition. Metal salts other than those mentioned above may also be used as the inorganic coating. Furthermore, an organic coating layer may be applied to at least a part of the particle surface in order to perform surface modification, typically hydrophobic treatment. Examples of organic coatings include treatments with silicone compounds such as dimethylpolysiloxane and methylhydrogenpolysiloxane, coupling agents such as silane-based, aluminum-based, titanium-based, and zirconium-based, fluorine compounds such as perfluoroalkyl phosphate compounds, hydrocarbons, lecithin, amino acids, polyethylene, wax, and metal soaps. A combination of these treatments may be performed, and the order of treatments is not particularly limited.

[0032] The iron oxide pigment to be blended in the cosmetic composition of the present invention is preferably washed and purified after production within the scope of common sense of a manufacturer of materials to be blended in the cosmetic composition. If impurities remain in the iron oxide pigment, it may affect its function as a cosmetic.

[0033] The cosmetic composition of the present invention can be produced by combining the iron oxide pigment having the above characteristics with other materials necessary for the cosmetic composition. There are no particular limitations on the method for producing the cosmetic composition. For example, the cosmetic composition can be produced by mixing the iron oxide pigment with other components and forming it into a desired formulation such as a liquid, solid, or gel as described below. For example, when a solid cosmetic composition is to be produced, the components can be mixed and then dried, molded, etc., as necessary. There are no particular limitations on the apparatus used for mixing, drying, molding, etc.

[0034] The cosmetic composition of the present invention preferably contains 0.1 g / kg or more and 500 g / kg or less of the iron oxide pigment of the present invention having the above-mentioned characteristics. When the amount of the iron oxide pigment is 500 g / kg or less, the cosmetic composition is prevented from having a powdery feel and is easily spreadable over a wide area. The amount is 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.

[0035] The cosmetic composition of the present invention may use only the iron oxide pigment of the present invention as a colorant, or may add other pigments to adjust the color within a quantitative and qualitative range that does not impair the effects of the present invention. Examples of inorganic pigments that can be used in combination include titanium oxide, zinc oxide, red iron oxide, yellow iron oxide, black iron oxide, ultramarine, Prussian blue, red iron oxide, cerium oxide, talc, muscovite, synthetic mica, phlogopite, biotite, synthetic fluorine phlogopite, titanium mica, micaceous iron oxide, sericite, zeolite, kaolin, bentonite, clay, silicic acid, silicic anhydride, magnesium silicate, aluminum magnesium silicate, calcium silicate, barium sulfate, magnesium sulfate, calcium sulfate, calcium carbonate, magnesium carbonate, boron nitride, bismuth oxychloride, alumina, zirconium oxide, magnesium oxide, chromium oxide, calamine, hydroxyapatite, and complexes thereof. Organic pigments that can also be used in combination include silicone powder, silicone elastic powder, polyurethane powder, cellulose powder, nylon powder, urethane powder, silk powder, PMMA powder, starch, polyethylene powder, polystyrene powder, carbon black, tar dyes, natural dyes, metal soaps such as zinc stearate, 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, the pigment to be added is preferably red iron oxide, yellow iron oxide, and / or black iron oxide from the viewpoint of preventing color separation.

[0036] Red iron oxide is generally made of an iron oxide called hematite, which is expressed by the chemical formula α-Fe2O3. Although there are differences depending on the observer and the environment, it generally presents a color close to the JIS common name red or red.

[0037] Cosmetic compositions containing the iron oxide pigment of the present invention may contain other components besides the pigment within quantitative and qualitative ranges that do not impair the effects of the present invention, depending on the purpose. For example, one or more of oil components, colorants, pH adjusters, moisturizers, thickeners, surfactants, dispersants, stabilizers, preservatives, antioxidants, sequestering agents, astringents, anti-inflammatory agents, UV absorbers, fragrances, abrasives, etc. may be appropriately blended. In particular, it is desirable to blend a plate-like compound such as mica, since this improves the slipperiness of the cosmetic composition.

[0038] (Cosmetic Uses) The cosmetic composition containing the iron oxide pigment of the present invention exhibits a large a value and / or b value and chroma even in a low lightness range, and furthermore, the pigment has a large coloring power, so that it is particularly suitable for use as a skin cosmetic that matches dark colors. Even when used as a skin cosmetic that matches dark colors, the cosmetic composition of the present invention can give a natural impression while producing a healthy appearance with vivid colors. In this specification, "bright" is the same as "high chroma." In addition, it is possible to reproduce dark colors with a single pigment, which could not be reproduced without mixing two or more iron oxide pigments in the past, and in that case, it can be used as a skin cosmetic that does not split into colors. In addition, even when reproducing dark colors by mixing other pigments in addition to the pigment of the present invention, the type of other pigments to be mixed can be reduced because the pigment of the present invention has the characteristic of exhibiting a color with high chroma even in a low lightness range, and in that case, it is possible to obtain a cosmetic composition that is less likely to split into colors.

[0039] In addition, since the iron oxide pigment of the present invention has a high tinting power, a cosmetic composition exhibiting a desired color can be obtained with a smaller content than conventionally, and the degree of freedom in formulation is increased. The iron oxide pigment of the present invention can be blended with a color tone adjuster to adjust subtle colors even in dark colors, and a wide range of colors can be expressed. The cosmetic composition of the present invention can also be used as a skin cosmetic that matches a color that is not a dark color. By using the iron oxide pigment of the present invention, the cosmetic composition can be given a smooth feel and usability that makes it easy to apply over a wide range.

[0040] Note that dark skin generally refers to skin with a dark or deep hue. The impression given by a person's skin color is greatly influenced by the observer, the environment, psychological effects, and the like. However, in this specification, for the sole purpose of defining the term to clarify the scope of a preferred embodiment of the present invention, "dark skin" is defined as skin that exhibits a color tone with a lightness L value of 30 or less in the Lab color space when the reflected light is evaluated with a colorimeter. Note that the above numerical range has no social meaning. Whether or not an individual's skin is dark skin can never be a basis for making any judgment about that individual.

[0041] The cosmetic composition of the present invention can be used as a cosmetic other than a skin cosmetic. The cosmetic composition of the present invention can be used as a substitute for the brown-colored cosmetic composition that has been used conventionally.

[0042] (Cosmetic formulation) A liquid cosmetic is one embodiment of the cosmetic composition of the present invention. The cosmetic composition may be in any form, such as an aqueous dispersion, an oily dispersion, or a lotion, and may be, for example, a makeup base, a control color, a sunscreen cosmetic, an eye shadow, an eye liner, a mascara, a cheek color, a nail polish, or other makeup cosmetic, a skin care cosmetic, a hair care cosmetic, a permanent hair dye, a semi-permanent hair dye, a primary hair dye, or a nail cosmetic.

[0043] A solid cosmetic is one embodiment of the cosmetic composition of the present invention. The formulation may be in any form, such as a powder, powder solid, paste, or oily solid, and may be, for example, a makeup cosmetic, skin care cosmetic, or hair care cosmetic, such as a makeup base, foundation, loose powder, blusher, concealer, eyebrow, face powder, control color, mascara, cheek color, body powder, pressed powder, perfume powder, or baby powder. It may also be used as a cosmetic that does not necessarily need to be colored, such as a face wash powder, soap, or powdered bath additive.

[0044] A gel-type cosmetic is one embodiment of the cosmetic composition of the present invention. The formulation may be in any form, such as a cream, emulsion, oily liquid, or paste, and may be, for example, a makeup base, control color, sunscreen cosmetic, lipstick, eye shadow, eyeliner, mascara, lip balm, lip color, lip gloss, nail polish, or other makeup cosmetic, skin care cosmetic, or hair care cosmetic. The cosmetic composition may also be used in cosmetics where coloring is not essential, such as shampoo, conditioner, body shampoo, facial cleanser, peel-off pack, toothpaste, etc. EXAMPLES

[0045] The present invention will be described in detail below with reference to examples. However, the following examples are presented merely for illustrative purposes and are not intended to limit the scope of the invention in any way. In the mixing operations described in the Examples and Comparative Examples, the rotation speed is appropriately adjusted to ensure uniform mixing throughout and to prevent droplets from scattering around, taking into consideration properties related to the behavior during mixing, such as the amount and viscosity of the mixture and the volume of the device used. In addition, when the same effect can be obtained by using any company's product as long as it is a general commercially available product, such as sodium hexametaphosphate, the names of the manufacturer and distributor are omitted.

[0046] [Example 1] Yellow iron oxide (LL-100HP, Titan Kogyo Co., Ltd.) synthesized by a known method was calcined in air at 380°C for 1 hour, and the product was calcined in a hydrogen atmosphere at 320°C for 4.5 hours, and further calcined in air at 250°C for 8 hours, and then air-cooled to obtain iron oxide pigment A.

[0047] [Example 2] Black iron oxide ABL-209HP (manufactured by Titan Kogyo Co., Ltd.), synthesized by a known method, was first calcined in air at 80°C for 4 hours, then calcined at 120°C for 4 hours, then calcined at 160°C for 4 hours, and finally calcined at 200°C for 4 hours, and then air-cooled to obtain iron oxide pigment B.

[0048] [Example 3] The same procedure as in Example 2 was carried out on black iron oxide BL-100HP (manufactured by Titan Kogyo Co., Ltd.) synthesized by a known method, to obtain iron oxide pigment C.

[0049] [Comparative Example 1] 500g / kg of commercially available yellow iron oxide LL-100HP (manufactured by Titan Kogyo, elemental Fe content 622g / kg, FeO content 0g / kg, Fe2O3 content 887g / kg) and 500g / kg of red iron oxide R-516HP (manufactured by Titan Kogyo, elemental Fe content 695g / kg, FeO content 0g / kg, Fe2O3 content 994g / kg) were uniformly mixed to obtain mixed pigment 1. The elemental Fe content of the obtained mixed pigment 1 was 659g / kg, the FeO content was 0g / kg, and the Fe2O3 content was 941g / kg.

[0050] [Comparative Example 2] Commercially available yellow iron oxide LL-100HP 750g / kg, red iron oxide R-516HP 150g / kg, and black iron oxide BL-100HP (manufactured by Titanium Industries, elemental Fe content 707g / kg, FeO content 220g / kg, Fe2O3 content 780g / kg) 100g / kg were uniformly mixed to prepare mixed pigment 2. The elemental Fe content of the obtained mixed pigment 2 was 641g / kg, the FeO content was 22g / kg, the Fe2O3 content was 892g / kg, and the total content of FeO, Fe2O3, and FeO was 914g / kg.

[0051] [Evaluation items and evaluation methods] The iron oxide pigments of Examples 1 to 3 and the mixed pigment of the Comparative Example were evaluated for the following items. [Fe content in iron oxide pigments] The evaluation was performed according to the method compliant with JIS K5109. 15 mL of hydrochloric acid was added to 0.3 g of well-dried iron oxide pigment sample, and the mixture was heated and concentrated to about 5 mL. Stannous chloride solution was gently dropped while heating, and when the liquid became colorless, two more drops were added and quenched with running water. 10 mL of mercuric chloride saturated solution was added, left for 5 minutes, 20 mL of mixed acid was added, and pure water was added to make the liquid volume 50 mL. Five drops of diphenylamine 4 sodium sulfonate solution with a concentration of 2 g / kg were added, and titration was performed with 0.05 mol / L potassium dichromate solution, and the end point was the point at which the color changed from green to purple. If the amount of 0.05 mol / L potassium dichromate solution used is c (mL), the content of element Fe in the pigment (g / kg) is 18.62 x c. The results are shown in Table 1.

[0052] [FeO content, Fe2O3 content] The evaluation was performed according to a method conforming to JIS K5109. 1)FeO content 35mL of distilled water and 15mL of concentrated sulfuric acid were added to 0.4g of a well-dried iron oxide pigment sample, which was then heated to dissolve and cooled to room temperature under running water. 150mL of pure water, 10mL of phosphoric acid, and 5 drops of a 2g / kg aqueous solution of sodium diphenylamine 4-sulfonate were added, and titration was performed with 0.05mol / L potassium dichromate solution, with the end point being the point at which the color changed from pale green to purple. If the amount of 0.05mol / L potassium dichromate solution used is a (mL), then the FeO content (g / kg) in the pigment is 17.96×a. 2)Fe2O3 content 15mL of hydrochloric acid was added to 0.4g of well-dried iron oxide pigment sample, and the mixture was heated and concentrated to about 5mL. Stannous chloride solution was gently added dropwise while heating, and when the liquid became colorless, two more drops were added and quenched with running water. 10mL of saturated mercuric chloride solution was added, left for 5 minutes, 20mL of mixed acid was added, and pure water was added to make the liquid volume 120mL. Five drops of a 2g / kg diphenylamine 4 sodium sulfonate solution were added, and titration with 0.05mol / L potassium dichromate solution was performed. The end point was when the color changed from green to purple. If the amount of 0.05mol / L potassium dichromate solution used is b(mL), the Fe2O3 content (g / kg) is 19.96×(ba). The results are shown in Table 1.

[0053] Pb, As, Hg, and Cd were analyzed by ICP-MS after dissolving the iron oxide pigment sample in sulfuric acid. Zn, Ba, Cr, Cu, and Ni were analyzed by ICP after dissolving the sample in hydrochloric acid. The results are shown in Table 2.

[0054] [X-ray diffraction intensity ratio between corundum and spinel structures] X-ray diffraction measurements were performed using the powder method with a Rigaku X-ray diffractometer RINT-TTR III. The iron oxide pigment sample was ground in a mortar and packed in a cell at approximately 0.7 g ± 0.2 g. The start angle was 5.0000°, the end angle was 70.0000°, the sampling width was 0.0100°, the scan speed was 5.0000° / min, the divergence slit was 0.5°, the scattering slit was 0.5°, the receiving slit width was 0.15 mm, and the characteristic X-rays were generated using a copper cathode with a wavelength of 0.15418 nm. The obtained X-ray diffraction pattern was smoothed, background processed, and peaks were detected using analysis software MDI JADE7 manufactured by Material Data. The results of the X-ray diffraction measurements are shown in Figure 1. The ratio of the integrated intensity of the diffraction line of the corundum structure appearing in the range of 32.60° to 33.60° was calculated, assuming that the integrated intensity of the diffraction line of the spinel structure appearing in the range of 35.10° to 36.10° was 100.00 (in this specification, this ratio is also called the "X-ray diffraction line intensity ratio of the corundum structure to the spinel structure"). In addition, when no peak was detected in the range of 32.60° to 33.60°, it was set to 0.00. The results are shown in Table 3.

[0055] [Average minor axis length of primary particles of iron oxide pigment particles] Measurements were performed using a JEOL transmission electron microscope JEM-1400plus. The observation magnification was 30,000x (transmission electron microscope observation magnification 10,000x x print 3x). The short axis length of approximately 300 primary particles within the observation field was evaluated using image analysis software ImageJ. The average short axis length of the approximately 300 particles was calculated, and this was taken as the average short axis length. The results are shown in Table 3.

[0056] [BET specific surface area] Measurements were performed using a single-point BET method using a Gemini VII 2390 manufactured by MICROMETORITICS, Inc. The results are shown in Table 3.

[0057] [Bulk density] The evaluation was performed according to the method compliant with JIS K5101-12-1. A funnel and a sieve with 45 μm openings were placed on the funnel stand attached to a powder tester manufactured by Hosokawa Micron, and a tablespoonful of iron oxide pigment sample with a volume of 15 mL was placed on the sieve. The entire surface of the sieve was lightly and evenly swept with a stiff-bristle brush to disperse the sample and allow it to fall into a receiver below the funnel stand. This operation was repeated until the receiver was heaped with the sample. Next, the heaped portion was scraped off with a spatula, and the mass of the contents of the receiver was measured. If the mass of the contents is d (g), the bulk density (g / mL) is d / 30. The results are shown in Table 3.

[0058] [Sieve residue] The evaluation was performed according to a method compliant with JIS K5101-14-1. 1.00 g of an iron oxide pigment sample was dispersed in a 0.5 g / kg aqueous solution of sodium hexametaphosphate, and then passed through a sieve with 45 μm mesh. The sieve was washed with a small amount of running water, then washed with a small amount of ethanol, and dried at 105°C for 1 hour. The mass of the sample remaining on the sieve was measured, and the proportion of the sample remaining on the sieve was calculated. The results are shown in Table 3.

[0059] [Oil absorption amount] 2g of the iron oxide pigment sample was spread on a glass plate, and a small amount of boiled linseed oil was dropped into the center of the sample. Each time, the entire sample was mixed with a spatula to knead the sample and boiled linseed oil together. The end point was when the entire sample became a uniform putty-like mass. If the amount of boiled linseed oil used is e (mL), the oil absorption (g / 100g) is 46.75 x e. The results are shown in Table 3.

[0060] [a value, b value and saturation] For iron oxide pigments A to C and mixed pigment 1, 250 g / kg of each pigment was replaced with black iron oxide BL-100HP to prepare powders with reduced brightness. 834 g / kg of Alkidia (registered trademark) 4250 manufactured by DIC Corporation, 156 g / kg of xylene, and 10 g / kg of butan-2-one oxime were mixed and used as solvent 1. 0.5 g of each powder was placed on the lower plate of a Huber Muller manufactured by Toyo Seiki Seisakusho Co., Ltd., 1 mL of solvent 1 was dropped, and the mixture was kneaded under a load of 667 N until the whole mixture became a uniform paste, and 2 mL of solvent 1 was further added and mixed. The obtained slurry was applied to a test paper, left to stand for 30 minutes, and then baked in air at 130° C. for 30 minutes. The L value, a value, and b value of the baked coating film were measured using a SM-7 type color tester manufactured by Suga Test Instruments (hereinafter referred to as "color tester"). The L, a, and b values ​​were also measured in the same manner for pigments in which 500 g / kg and 750 g / kg of each pigment were replaced with black iron oxide. The results are shown in Figures 2 and 3. If the obtained a and b values ​​are a1 and b1, respectively, the chroma C can be calculated by the following formula: C=(a1 2 +b1 2 ) 1 / 2 The results obtained are shown in FIG.

[0061] [Coloring power] For iron oxide pigments A to C and mixed pigment 2, 0.125 g of each pigment was mixed with 0.375 g of titanium oxide to prepare a mixed powder. On the other hand, 834 g / kg of Alkidia (registered trademark) 4250 manufactured by DIC Corporation, 156 g / kg of xylene, and 10 g / kg of butan-2-one oxime were mixed and used as solvent 1. 0.5 g of each powder was placed on the lower plate of a Huber Muller manufactured by Toyo Seiki Seisakusho Co., Ltd., 1 mL of solvent 1 was dropped, and the mixture was kneaded under a load of 667 N until the whole mixture became a uniform paste, and 2 mL of solvent 1 was further added and mixed. The obtained slurry was applied to a test paper, left to stand for 30 minutes, and then baked in air at 130 ° C for 30 minutes, and the L value, a value, and b value of the baked coating film were measured using a color tester. The color difference ΔE between the measured values ​​of L, a, and b and white (L=100, a=0, b=0) was defined as color strength. If the measured values ​​of L, a, and b are L2, a2, and b2, respectively, the color strength ΔE is calculated by the following formula: ΔE={(L2-100) 2 +(a2-0) 2 +(b2-0) 2} 1 / 2 The results are shown in Table 4.

[0062] [Table 1]

[0063] [Table 2]

[0064] [Table 3]

[0065] [Table 4]

[0066] From FIG. 1, it can be seen that the iron oxide pigments of Examples 1 to 3 have a spinel structure or a spinel structure and a corundum structure. Also, from FIG. 2 and FIG. 3, it can be seen that the iron oxide pigment A of Example 1 has a larger b value than the mixed pigment 1 of Comparative Example 1 when compared at the same lightness (L value). Such iron oxide pigments have the advantage that it is easy to mix yellow colors, especially in the low lightness range. Also, it can be seen that the iron oxide pigments B and C of Examples 2 and 3 have larger a and b values ​​than the mixed pigment 1. Such iron oxide pigments have the advantage that it is easy to mix a wide range of colors in the low lightness range. Furthermore, from FIG. 4, it can be seen that the iron oxide pigments used in all Examples show a higher chroma than the mixed pigment 1 when compared at the same lightness (L value).

[0067] The above results show that the iron oxide pigment of the present invention has a large a value and / or b value in the low lightness range, a large saturation, and a large tinting power. It can be said that a cosmetic composition containing the iron oxide pigment of the present invention is suitable for use as a skin cosmetic that matches dark colors.

[0068] A skin cosmetic is one of the main aspects of the present invention. Formulation examples are shown below. [Prescription example] Formulation 1: Light beige powder foundation Ingredients Mixing ratio (g / kg) (1) Iron oxide pigment A 9.4 (2) Black iron oxide pigment (BL-100HP manufactured by Titanium Industries; the following formulation examples also use BL-100HP for black iron oxide) 0.6 (3) Mica (Topy Industries PDM-1000) 490 (4) Talc (JA-46R manufactured by Asada Flour Milling Co., Ltd.) 300 (5) Titanium oxide (Ishihara Sangyo Kaisha, Ltd. C-50R) 100 (6) Oil solution {a mixture of Crodalan SWL (manufactured by Croda Co., Ltd.), Phytosqualane (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 (Production method) (1) and (2) were mixed by hand in advance, and the mixed pigment was mixed with (3) to (6) uniformly using a Mitsui Miike Chemical Engineering FM-10B (hereinafter referred to as "Henschel Mixer"). The mixture was ground in a hammer mill, filled into a mold, and compression molded to obtain the desired light beige powder foundation. The resulting light beige powder foundation had a smooth feel to the touch, and importantly, it had a natural finish while still providing a vibrant color and a healthy appearance.

[0069] Formulation 2 Beige-brown powder foundation Ingredients Mixing ratio (g / kg) (1) Iron oxide pigment B 248 (2) Black iron oxide 16 (3) Mica (Topy Industries PDM-1000) 264 (4) Sericite 352 (5) Dimethicone 120 (Production method) (1) and (2) were mixed by hand in advance, and the mixed pigment was mixed with (3) to (5) uniformly using a Henschel mixer. The mixture was ground in a hammer mill, filled into a mold, and compression molded to obtain the desired beige-brown powder foundation. The resulting beige-brown powder foundation had a smooth feel to the touch, and most importantly, a natural finish with vibrant colors and a healthy appearance.

[0070] Formula 3: Dark brown powder foundation Ingredients Mixing ratio (g / kg) (1) Iron oxide pigment C 300 (2) Black iron oxide 300 (3) Mica (Topy Industries PDM-1000) 300 (4) Oil solution {a mixture of Crodalan SWL (manufactured by Croda Co., Ltd.), Phytosqualane (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 (Production method) (1) and (2) were mixed by hand in advance, and the mixed pigment was mixed with (3) and (4) uniformly using a Henschel mixer. The mixture was ground in a hammer mill, filled into a mold, and compression molded to obtain the desired dark brown powder foundation. The resulting dark brown powder foundation had a smooth feel to the touch, and most importantly, a natural finish while still providing a vibrant color and a healthy appearance.

[0071] Formulation 4: Stick foundation Ingredients Mixing ratio (g / kg) (1) Cyclopentasiloxane 300 (2) Ethylhexyl methoxycinnamate 50 (3) Diisostearyl malate 40 (4) Candelilla Wax 60 (5) Hydrogenated Jojoba Esters 40 (6) Cetyl dimethicone copolyol 20 (7) Sorbitan sesquiisostearate 5 (8) Hydrogen dimethicone treated iron oxide pigment A 25 (9) Hydrogen dimethicone treated titanium dioxide 83 (10) Hydrogen dimethicone-treated talc 60 (11) Methyl methacrylate crosspolymer (M-305, manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) 40 (12) Purified water remainder (13) Sodium citrate 3 (14) Propanediol 30 (15) Glycerin 20 (Production method) Powder parts (8) to (11) were mixed in advance in a Henschel mixer. Oil phase parts (1) to (7) were weighed into a container that could hold the entire amount and dissolved by heating. Water phase parts (12) to (15) were weighed into a separate container and dissolved by heating. The powder part was added to the oil phase and uniformly dispersed, the water phase was added and emulsified, and after degassing, the bulk was poured into a mold and slowly cooled to room temperature to obtain the desired stick-type foundation. The obtained stick-type foundation had excellent adhesion and a smooth feel when used. And importantly, it gave the user a healthy appearance with vivid colors and a natural finish.

[0072] Formula 5 W / O emulsion foundation Ingredients Mixing ratio (g / kg) (1) PEG-10 Dimethicone 20 (2) Polyglyceryl-10 Polyricinoleate 5 (3) Neopentyl glycol dicaprylate 30 (4) Squalane 10 (5) Pentaerythrityl tetraisopropyl ether 20 (6) Inulin stearate 10 (7) Ethylhexyl methoxycinnamate 40 (8) Cyclopentasiloxane Residuals (9) Hydrogen dimethicone treated titanium dioxide 77 (10) Hydrogen dimethicone treated talc 57 (11) Hydrogen dimethicone treated iron oxide pigment C 27 (12) Purified water 380 (13) 1,3-butylene glycol 60 (14) Glycerin 10 (15) Sodium chloride 10 (16) Phenoxyethanol 5 (Production method) The powder parts (9) to (11), which had been mixed in advance in a Henschel mixer, were added to the oil phase parts (1) to (8), and the mixture was uniformly dispersed using a stirrer. The aqueous phase parts (12) to (16) were dissolved by heating in a separate container. The aqueous phase part was added to the oil phase part in which the powder part had been dispersed, and after emulsification, the mixture was cooled to room temperature to obtain the desired W / O emulsion foundation. The obtained W / O emulsion foundation had good spreadability and a smooth feel when used. And, importantly, it gave the user a healthy appearance with vivid colors, while still providing a natural finish.

[0073] Formula 6 O / W emulsion foundation Ingredients Mixing ratio (g / kg) (1) Stearic acid 10 (2) Isostearic acid 3 (3) Cetyl ethylhexanoate 40 (4) Liquid Paraffin 70cs 110 (5) Steareth-10 20 (6) Cetyl alcohol 15 (7) Triethoxycaprylylsilane-treated talc 50 (8) Triethoxycaprylylsilane-treated iron oxide pigment A 27 (9) Triethoxycaprylylsilane-treated titanium dioxide 75 (10) Triethanolamine 12 (11) Propanediol 50 (12) Xanthan gum 2 (13) Purified water remainder (14) Phenoxyethanol 5 (Production method) The mixed and ground (7) to (9) were added to (1) to (6) which had been heated and dissolved at 85°C, and dispersed uniformly. The mixture of (10) to (14) which had been heated to 85°C was gradually added to this to emulsify, and after cooling with stirring to room temperature, the mixture was filled into a suitable container to obtain the desired O / W emulsion foundation. The obtained O / W emulsion foundation had good spreadability and a smooth feel when used. And, importantly, it gave the user a healthy appearance with vivid colors, while still providing a natural finish.

[0074] Formula 7 2WAY Cake Foundation Ingredients Mixing ratio (g / kg) (1) Dimethicone-treated talc residue (2) Dimethicone-treated titanium dioxide 100 (3) Dimethicone-treated mica 200 (4) Dimethicone-treated sericite 360 (5) Nylon powder 100 (6) Dimethicone-treated red iron oxide (R-516HP manufactured by Titanium Industries; the following recipe also uses R-516HP for red iron oxide) 2 (7) Dimethicone-treated iron oxide pigment B 27 (8) Dimethicone 1000cs 60 (9) Isotridecyl isononanoate 30 (10) Squalane 30 (11) Tocopherol 1 (12) 1,3-butylene glycol 10 (Production method) (1) to (7) were mixed in a Henschel mixer, and then (8) to (12) that had been heated and dissolved were mixed in, and the mixture was then pulverized in an atomizer and press molded into an aluminum dish to obtain the desired 2-way foundation. The resulting 2-way foundation was smooth and refreshing to use, and most importantly, it gave the user a natural finish while still providing a healthy appearance with vibrant colors.

[0075] Formula 8 Oil-based cake foundation Ingredients Mixing ratio (g / kg) (1) Dimethicone-treated talc residue (2) Dimethicone-treated titanium dioxide 130 (3) Dimethicone-treated sericite 280 (4) Dimethicone-treated iron oxide pigment A 27 (5) Dimethicone-treated black iron oxide 1 (6) Candelilla Row 10 (7) Carnauba wax 10 (8) Ceresin 15 (9) Cyclopentasiloxane 140 (10) Isononyl isononanoate 250 (11) Polyglyceryl diisostearate 20 (12) Ethylhexyl methoxycinnamate 30 (Production method) The powder parts (1) to (5) were mixed in a Henschel mixer and pulverized uniformly. The oil phase parts (6) to (12) were heated and dissolved, and the powder parts were added and stirred uniformly. After degassing, the bulk was poured into a tray and slowly cooled to room temperature to obtain the desired oil-based cake foundation. The obtained oil-based cake foundation was not oily and had a smooth feel when used. And, importantly, it gave the user a natural finish while still providing a healthy appearance with vibrant colors.

[0076] Formula 9 Blushing Ingredients Mixing ratio (g / kg) (1) Triethoxycaprylylsilane-treated talc 250 (2) Triethoxycaprylylsilane-treated sericite residue (3) Stearic acid-treated titanium dioxide microparticles (Titanium Industries STV-455) 30 (4) Triethoxycaprylylsilane-treated titanium dioxide 18 (5) Triethoxycaprylylsilane-treated black iron oxide 0.5 (6) Triethoxycaprylylsilane-treated red iron oxide 2 (7) Triethoxycaprylylsilane-treated iron oxide pigment B8 (8) Ethylhexyl methoxycinnamate 30 (9) Ethylhexyl palmitate 50 (10) Preservatives (appropriate amount) (11) Antioxidant (appropriate amount) (Production method) (1) to (7) were mixed in a Henschel mixer, and then (8) to (11) that had been heated and dissolved were mixed with this, and then pulverized in an atomizer. This was press-molded into an aluminum dish to obtain the desired blush. The resulting blush was easy to use, and most importantly, it gave the user a vibrant color and a healthy appearance, while still providing a natural finish.

[0077] Formulation 10 Loose Powder Ingredients Mixing ratio (g / kg) (1) Talc Residue (2) Pigment-grade titanium dioxide 10 (3) Amihope (registered trademark) LL 30 (4) PMMA (Matsumoto Microsphere S-100, 10 μm, manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.) 80 (5) Preservatives (appropriate amount) (6) Iron oxide pigment B 10 (7) Squalane 10 (8) Preservatives (appropriate amount) (9) Antioxidant (appropriate amount) (10) Flavoring (appropriate amount) (Production method) After mixing and grinding (1) to (7), the mixture was transferred to a LAB.MIXER LM-110T manufactured by HANIL Electric.Co.,Lid, and (8) to (10) were added and stirred until uniform. The resulting mixture was ground in a sample mill TASM-1 manufactured by Tokyo Atomizer Mfg. Co.,Ltd, and packed to obtain a loose powder. The resulting loose powder had a natural finish while giving the user a healthy appearance with vivid colors.

[0078] A cosmetic preparation in a liquid form is also one embodiment of the present invention. Formulation examples are shown below. Formula 11 Water-based eyeliner Ingredients Mixing ratio (g / kg) (1) Black iron oxide 50 (2) Iron oxide pigment C 25 (3) Purified water remainder (4) Decaglyceryl laurate 10 (5) Glycerin 60 (6) Carboxymethylcellulose 100g / kg aqueous solution 180 (7) Phenoxyethanol 5 (8) Pentylene glycol 10 (9) Vinyl acetate resin emulsion (Vinylblan (registered trademark) GV-5651, manufactured by Nissin Chemical Industry Co., Ltd.) 450 (Production method) (1) to (3) were weighed, and (1) and (2) were finely dispersed in (3) using a bead mill. (4) to (8) were weighed in a separate container, and the pigment portion was added at 70°C and uniformly dispersed. After cooling to room temperature, (9) was added to obtain the desired water-based eyeliner. The obtained water-based eyeliner had a vivid brownish color and was excellent in feel when used.

[0079] Formulation 12 Nail Enamel Ingredients Mixing ratio (g / kg) (1) Nitrocellulose (viscosity 1 / 2 second) 100 (2) Modified alkyd resin 100 (3) Acetyl tributyl citrate 50 (4) Ethyl acetate 200 (5) Ethanol 50 (6) Toluene Residual (7) Iron oxide pigment A 90 (8) Organically modified montmorillonite 30 (Production method) (7) was mixed with a portion of (2) and (3) and kneaded thoroughly. The remaining portions of (2) and (3) and (1), (4) to (6) and (8) were added to this and mixed until uniform, obtaining the desired nail enamel. The resulting nail enamel had a vivid color and excellent hiding power.

[0080] Formulation Example 13 Primary Hair Dye (1) Iron oxide particles A 50 (2) Red No. 202 10 (3) Polyvinyl alcohol 500 5 (4) Triethanolamine 6 (5) Ethyl acetate remainder (Production method) (3) to (5) were mixed in a Henschel mixer, and when the ingredients were homogenized, (1) and (2) were added and further mixed until the whole was homogenized to obtain the target primary hair dye. The obtained primary hair dye had a vivid brown color and was not squeaky to the touch.

[0081] A cosmetic preparation in a solid form is also one embodiment of the present invention. Formulation examples are shown below. Formulation example 14: Press type eye shadow Ingredients Mixing ratio (g / kg) (1) Iron oxide pigment C 270 (2) Sericite residue (3) Talc 149 (4) Titanium mica (BASF: Flamenco Super Pearl 120C) 200 (5) Methylparaben 1 (6) Dimethicone 1000cs 70 (7) Diisostearyl malate 30 (8) Isopropyl alcohol (as needed) (Production method) (1) to (5) were mixed and ground. Next, (6) and (7) mixed in a separate container were added and stirred until homogeneous. The adjusted mixture was dispersed in (8) to a suitable viscosity, and this was compressed and filled into an appropriate metal dish using a slurry filling machine. The mixture was dried at 40°C for 12 hours to obtain the desired press-type eye shadow. The product obtained had a vivid color, excellent adhesion, and was smooth to use.

[0082] Formula 15 Eyebrow Pencil Ingredients Mixing ratio (g / kg) (1) Black iron oxide 160 (2) Iron oxide pigment C 25 (3) Titanium dioxide 45 (4) Talc Residue (5) Kaolin 150 (6) Rowlet 200 (7) Stearic acid 100 (8) Beeswax 50 (9) Hydrogenated castor oil 50 (10) Vaseline 30 (11) Lanolin 30 (12) Squalane 30 (13) Preservatives (appropriate amount) (14) Antioxidant (appropriate amount) (Production method) The mixed and ground (1) to (5) were added to the heated and melted (6) to (14), and the mixture was uniformly kneaded in a three-roll mill, molded into a pencil-like core, and sandwiched between pieces of wood to obtain the desired eyebrow pencil. The obtained eyebrow pencil had a vivid color and a smooth feel when used.

[0083] Formula 16 Pressed Eyebrow Ingredients Mixing ratio (g / kg) (1) Titanium dioxide 140 (2) Black iron oxide 140 (3) Iron oxide pigment C 25 (4) Ultramarine 5 (5) Mica Residual (6) Talc 100 (7) Lanolin wax 100 (8) Liquid Paraffin 40 (9) Glyceryl stearate 10 (10) Preservatives (appropriate amount) (11) Antioxidant (appropriate amount) (Production method) The mixed and ground (1) to (6) were added to the heated and melted (7) to (11), mixed until uniform, and compression molded to obtain the desired pressed eyebrow. The obtained pressed eyebrow had a vivid color and excellent colorability.

[0084] Formulation 17 Pressed Powder Ingredients Mixing ratio (g / kg) (1) Hydrogen dimethicone treated talc residue (2) Methyl methacrylate crosspolymer (M-305, manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) 100 (3) Hydrogen dimethicone treated sericite 500 (4) Silica (Sunsphere (registered trademark) NP-30, manufactured by AGC Si-Tech) 60 (5) Hydrogen dimethicone treated titanium dioxide 55 (6) Hydrogen dimethicone treated black iron oxide 0.5 (7) Hydrogen dimethicone treated red iron oxide 0.5 (8) Hydrogen dimethicone treated iron oxide pigment B 10 (9) Ethylhexyl methoxycinnamate 30 (10) Squalane 20 (11) Preservatives (appropriate amount) (12) Antioxidant (appropriate amount) (Production method) The powder parts (1) to (8) were mixed and ground, then transferred to a Henschel mixer, and the oil phase parts (9) to (12) were added and stirred until homogeneous. Then, the mixture was ground using an atomizer. The mixture was press molded into an aluminum dish to obtain the desired pressed powder. The obtained pressed powder had a vivid color, excellent adhesion, and a smooth feel when used.

[0085] A cosmetic preparation in the form of a gel is also one embodiment of the present invention. Formulation examples are shown below. Formula 18 Cream eyeshadow Ingredients Mixing ratio (g / kg) (1) Talc 100 (2) Kaolin 50 (3) Iron oxide pigment C 45 (4) Stearic acid 30 (5) Isopropyl myristate 80 (6) Liquid Paraffin 70cs 50 (7) Propylene glycol laurate 30 (8) Tocopherol 0.5 (9) Purified water remainder (10) Concentrated glycerin 50 (11) 1,3-butylene glycol 10 (12) Methylparaben 2 (13) Triethanolamine 12 (14) EDTA-3Na 0.5 (Production method) The mixed and ground ingredients (1) to (3) were added to ingredients (9) to (15) and mixed by stirring. To this, ingredients (4) to (8) which had been dissolved by heating at 70 to 80°C were added and emulsified, and the mixture was cooled by stirring to obtain the desired cream eye shadow. The obtained cream eye shadow had a vivid color, was smooth to use, and had excellent adhesion.

[0086] Formula 19 Oil-based eyeliner Ingredients Mixing ratio (g / kg) (1) Dextrin isostearate (Unifilma (registered trademark) HVY, manufactured by Chiba Flour Mills) 50 (2) Microcrystalline wax 50 (3) Dextrin palmitate 100 (4) Diisostearyl malate 100 (5) Isododecane Residual (6) Dimethicone-treated black iron oxide 245 (7) Dimethicone-treated iron oxide pigment B 25 (8) Mica 200 (Production method) (1) to (5) were weighed and mixed by heating until uniform. Mixed and ground (6) to (8) were added and mixed by heating until uniform. The mixture was cooled to 40°C, poured into a suitable container and cooled to room temperature to obtain the desired oil-based eyeliner. The obtained oil-based eyeliner had a vivid color and excellent spreadability.

[0087] Formula 20 Emulsion Mascara Ingredients Mixing ratio (g / kg) (1) Purified water remainder (2) Polyvinylpyrrolidone 20 (3) Propanediol 20 (4) Cationic cellulose 1% aqueous solution 100 (5) Bentonite 5 (6) Triethanolamine 17 (7) Methylparaben 2 (8) Talc 40 (9) Black iron oxide 90 (10) Iron oxide pigment C 25 (11) Carnauba Wax 55 (12) Beeswax 90 (13) Stearic acid 20 (14) Self-emulsifying glyceryl stearate 20 (15) Propylene glycol stearate 20 (16) Hydrogenated polyisobutene 20 (17) Cyclopentasiloxane 40 (18) Acrylic acid resin emulsion (Daitozoru (registered trademark) 5000AD, manufactured by Daito Chemical Industry Co., Ltd.) 200 (Production method) (8) to (10), which had been mixed in advance using a Henschel mixer, were added to (1) to (7), and the mixture was uniformly dispersed using a stirrer. (11) to (17), which had been heated and dissolved, were added to the mixture to emulsify, and the mixture was cooled to 40°C, (18) was added, and the mixture was cooled to room temperature to obtain the desired emulsion mascara. The resulting emulsion mascara exhibited vivid colors and was excellent in feel when used.

[0088] Formula 21 Oil-based mascara Ingredients Mixing ratio (g / kg) (1) Hydrogenated polyisobutene 20 (2) Isododecane remainder (3) Dextrin isostearate 50 (4) Dextrin palmitate 150 (5) Microcrystalline wax 20 (6) Polyethylene wax 30 (7) Propylparaben 1 (8) Talc 60 (9) Black iron oxide 55 (10) Iron oxide pigment B10 (11) Dimethylsilylated silica 5 (12) Nylon fiber (Cosmetics 5D-8MM) 10 (Production method) (1) to (7) were heated and melted, and then mixed with (8) to (10) and (11) which had been previously mixed and ground. After cooling, (12) was uniformly dispersed to obtain an oil-based mascara. The oil-based mascara obtained had a vivid color and was excellent in adhesion and usability.

[0089] Formula 22 Lipstick Ingredients Mixing ratio (g / kg) (1) Ceresin 100 (2) Microcrystalline wax 32 (3) Paraffin 50 (4) Pentaerythrityl tetraisostearate 200 (5) Diisostearyl malate 150 (6) Hydrogenated polydecene 100 (7) Vaseline 100 (8) Polyglyceryl-2 triisostearate residues (9) Simethicone 1 (10) Propylparaben 1 (11) Red No. 202 4 (12) Iron oxide pigment A 18 (13) Titanium dioxide 3 (14) Silica 10 (Production method) (1) to (14) were weighed and mixed under heating. After uniformly dispersing using a three-roll mill, the mixture was further heated and mixed uniformly. After degassing, the heated mixture was poured into a mold and rapidly cooled. The mixture was placed in a suitable container to obtain the desired lipstick. The resulting lipstick had a unique, vivid reddish color.

[0090] Formula 23 Lip Color Ingredients Mixing ratio (g / kg) (1) Dextrin (palmitic acid / ethylhexanoic acid) 50 (2) Pentaerythrityl tetraisostearate 120 (3) Hydrogenated polydecene 100 (4) Polyglyceryl-2 triisostearate residues (5) Hydrogenated rosin acid, pentaerythrityl 100 (6) Octyldodecyl isostearate 100 (7) Glyceryl behenate / eicosanedioate 20 (8) Dimethylsilylated silica 10 (9) Propylparaben 1 (10) Hydrogenated polyisobutene 350 (11) Silicone-treated iron oxide pigment B 10 (12) Red No. 202 4 (Production method) (1) to (12) were mixed together under heat until uniform. After degassing, the mixture was poured into a suitable container and cooled slowly to room temperature to obtain the desired lip color. The resulting lip color had a unique, vivid reddish hue.

[0091] Formula 24 Lip Gloss Ingredients Mixing ratio (g / kg) (1) Dextrin palmitate 100 (2) Diisostearyl malate 450 (3) Liquid paraffin residue (4) Preservatives 1 (5) Antioxidants 1 (6) Iron oxide pigment A 5 (7) Red No. 202 1 (Production method) (1) to (5) were heated to 85°C and uniformly dissolved, and (6) to (7) were added and uniformly dispersed. The mixture was poured into a container at high temperature and then rapidly cooled to room temperature to obtain the desired lip gloss. The resulting lip gloss had a unique bright red color.

[0092] Use of the cosmetic composition of the present invention for washing the face or removing dirt from the body, or for brushing teeth, is also one aspect of the use of the cosmetic composition of the present invention. Prescription 25 Body Shampoo Ingredients Mixing ratio (g / kg) (1) Lauric acid 115 (2) Myristic acid 77 (3) Palmitic acid 48 (4) Potassium hydroxide (purity 480g / kg) 122 (5) Lauryl hydroxysulfobetaine 100 (6) Cocamide monoethanolamide 10 (7) Ethylene glycol distearate 20 (8) Purified water remainder (9) EDTA-4Na 1 (10) Iron oxide pigment B10 (11) Talc 4 (Production method) (1) to (3) were heated to 70 to 80°C and dissolved. Next, (4) was gradually added and saponification was carried out. When saponification was completed, the remaining (5) to (9) were added and stirred until uniform. The mixture was cooled to 40°C, and mixed and ground (10) and (11) were added, and the mixture was cooled to room temperature while stirring to obtain the desired body shampoo. The obtained body shampoo had a bright brown color.

[0093] Prescription 26 Facial cleanser Ingredients Mixing ratio (g / kg) (1) Stearic acid 170 (2) Myristic acid 70 (3) Lauric acid 30 (4) Potassium hydroxide (purity 480g / kg) 120 (5) PEG-60 glyceryl diisostearate 30 (6) Glyceryl stearate 20 (7) Sorbitol 80 (8) PEG1500 100 (9) Cocamidopropyl Betaine 50 (10) Glycerin 180 (11)EDTA-4Na 1 (12) Purified water remainder (13) Pentylene glycol 15 (14) Iron oxide pigment C3 (15) Talc 6 (Production method) (1) to (3) were heated to 70°C to 80°C and dissolved. Next, (4) was gradually added and saponification was carried out. When saponification was completed, the remaining (5) to (13) were added and stirred until uniform. The mixture was cooled to 40°C, and mixed and ground (14) and (15) were added, and the mixture was cooled to room temperature while stirring to obtain the desired facial cleansing foam. The obtained facial cleansing foam had a vivid brownish color.

[0094] Prescription 27 Facial cleansing powder Ingredients Mixing ratio (g / kg) (1) Iron oxide pigment A3 (2) Talc 200 (3) Lauric acid 50 (4) Mannitol Residual (5) Potassium myristate 300 (6) Glucose 100 (7) Potassium myristoyl glutamate 20 (8) Sodium methyl cocoyl taurate 30 (9) Betaine 10 (10) TANAKURA CLAY (registered trademark) 50 (11) Guar Hydroxypropyltrimonium Chloride 5 (12) Pentylene glycol 10 (Production method) (1) to (12) were mixed uniformly in a Henschel mixer to obtain the desired face wash powder, which had a vivid brown color.

[0095] Prescription 28 Solid soap (1) Fatty acid alkali metal salts 945 (Lauric acid 380g / kg, myristic acid 370g / kg, palmitic acid 150 g / kg, stearic acid 100g / kg) (Potassium:Sodium=1:5) (2) Cocamidopropyl Betaine 30 (3) Glycerin 20 (4) Iron oxide pigment A 5 (Production method) (1) was heated and dissolved, and (2) to (4) were added and mixed, and further homogenized using a three-roll mill. The resulting mixture was then kneaded and compressed in an extruder to extrude into a rod shape, which was then molded in a molder to obtain the desired solid soap. The resulting solid soap had a vivid brownish color.

[0096] Prescription 29 Powdered bath additive Ingredients Mixing ratio (g / kg) (1) Sodium sulfate 860 (2) Sodium bicarbonate remainder (3) Monosodium glutamate 20 (4) Silica (AGC Si-Tech, Sunsphere (registered trademark) H-52) 10 (5) Iron oxide pigment A 5 (6) Vanillyl butyl ether 2 (7) Capsicum extract 1 (Production method) (1) to (7) were mixed uniformly in a Henschel mixer to obtain the desired powdered bath additive. When the powdered bath additive was used, the bath water took on a vivid brown color.

[0097] Formula 30 Peel-off Pack Ingredients Mixing ratio (g / kg) (1) PEG1500 80 (2) PEG / PPG-25 / 30 copolymer 60 (3) Xanthan gum 2 (4) Sodium citrate 3 (5) Citric acid 1 (6) Purified water remainder (7) Polyvinyl alcohol 100 (8) Polysorbate-80 2 (9) Silica (AGC Si-Tech, Sunsphere (registered trademark) H-51) 40 (10) Talc 80 (11) Iron oxide pigment C10 (12) Alkyl acrylate copolymer emulsion 50 (13) Methylparaben 2 (14) Ethanol 80 (Production method) The mixed and ground (9) to (11) were added to the heated and dissolved (1) to (8), and after uniform dispersion, the mixture was cooled to 40°C. Next, (12) to (14) were added, and the mixture was stirred and cooled to room temperature to prepare the desired peel-off pack. The obtained peel-off pack had a unique and vivid color.

[0098] Formulation 31 Toothpaste (1) Calcium carbonate 290 (2) Iron oxide pigment A5 (3) Red No. 202 5 (4) Sorbitol solution 35 (5) Glycerin 35 (6) Guar gum 30 (7) Distilled water 600 (Production method) (1) to (3) were weighed and added to (7), and the mixture was stirred for 5 minutes using a specially manufactured ROBOMICS fMODEL. (4) to (6) were added while stirring, and the stirring was stopped when the mixture became viscous. The resulting toothpaste had a vivid color and was viscous enough to be filled into a tube, yet fluid enough to allow the abrasive to penetrate into the gaps between teeth.

Claims

1. The content of Fe element is 680 g / kg or more and 702 g / kg or less, the content of FeO is 30 g / kg or less, and Fe ２ O ３ The content is 939 g / kg or more, and FeO and Fe ２ O ３ 1. An iron oxide pigment for a cosmetic composition, which has a spinel structure or a spinel structure and a corundum structure, and in which the total content of

2. 2. The iron oxide pigment of claim 1, having Pb equal to or less than 10 mg / kg, As equal to or less than 3 mg / kg, Hg equal to or less than 1 mg / kg, Cd equal to or less than 1 mg / kg, Zn equal to or less than 100 mg / kg, Ba equal to or less than 50 mg / kg, Cr equal to or less than 100 mg / kg, Cu equal to or less than 50 mg / kg, and Ni equal to or less than 200 mg / kg.

3. 3. The iron oxide pigment according to claim 1, wherein, in an X-ray diffraction measurement, when the integrated intensity of the diffraction line of the (311) plane of the spinel structure iron oxide, which appears at a diffraction angle of 35.10° to 36.10°, is taken as 100.00, the integrated intensity of the diffraction line of the (104) plane of the corundum structure iron oxide, which appears at a diffraction angle of 32.60° to 33.60°, is 10.0 or less.

4. 4. The iron oxide pigment according to claim 1, wherein the average minor axis length of the primary particles is from 50 nm to 500 nm.

5. BET specific surface area is 2.0m ２ / g or more 25.0m ２ 5. The iron oxide pigment according to claim 1, having a molecular weight of 1.0 g / kg or less, a bulk density of 70 g / mL or less, and a residue when passed through a sieve having an opening of 45 μm or less.

6. 6. The iron oxide pigment according to claim 1, which has an oil absorption of 20 g / 100 g or more and 50 g / 100 g or less.

7. A cosmetic composition comprising the iron oxide pigment according to any one of claims 1 to 6.

8. The cosmetic composition according to claim 7, which is a skin cosmetic.

9. The cosmetic composition according to claim 7 or 8, which is a liquid cosmetic composition.

10. The cosmetic composition according to claim 7 or 8, which is a solid cosmetic composition.

11. The cosmetic composition according to claim 7 or 8, which is a gel cosmetic composition.

12. The cosmetic composition according to claim 7 , which is used for the purpose of reproducing a dark color.

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