Powder solid cosmetic

Abstract

Provided is a powder solid cosmetic having excellent usability and moldability. This powder solid cosmetic contains (A) a metallic soap-treated plate-like powder, (B) an amino acid-treated plate-like powder, and (C) an inelastic spherical powder. The composition can further comprise oil content and content.

Description

Technical Field

[0001] The present invention relates to solid cosmetics. More specifically, it relates to powdery solid cosmetics having excellent moldability and usability. Background Art

[0002] Conventionally, powdery solid cosmetics such as foundation usually contain talc and fine resin powders. This is because talc is effective in improving the moldability of solid cosmetics, and fine resin powders are effective in imparting excellent usability to cosmetics. However, since talc has an uneven shape, although it can improve the moldability and impact resistance of powdery solid cosmetics, there is room for improvement in the following aspects for powdery solid cosmetics containing talc. From the viewpoint of usability, there is room for improvement in the smoothness of the touch, and from the viewpoint of the finished state, there is room for improvement in that the appearance sometimes becomes powdery when applied to the skin. Therefore, there is a desire to develop cosmetics that do not contain talc, resin powders, etc.

[0003] From such a viewpoint, a method of using mica instead of talc has been studied, but it is difficult to achieve sufficient performance from the viewpoint of improving moldability. In addition, for fine resin powders, a method of using silica as a substitute has been studied, but in most cases, the usability becomes insufficient or the moldability becomes insufficient.

[0004] Based on the above background, there is a need for cosmetics that achieve excellent moldability and usability and do not contain talc or the like.

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-177640 Summary of the Invention

[0008] An object of the present invention is to provide: powdery solid cosmetics capable of achieving excellent usability and moldability.

[0009] According to the present invention, the following inventions are provided. [1]

[0011] A powdery solid cosmetics, comprising:

[0012] (A) Metal soap-treated plate-like powder,

[0013] (B) Amino acid-treated plate-like powder, and

[0014] (C) Non-elastic spherical powder. [2]

[0016] The cosmetic according to [1], wherein the component (A) is mica treated with a metal soap. [3]

[0018] The cosmetic according to [1] or [2], wherein the component (B) is mica treated with an amino acid. [4]

[0020] The cosmetic according to any one of [1] to [3], wherein the component (C) is an inorganic spherical powder or an organic spherical powder having a crushing strength of 30 MPa or more per particle on average. [5]

[0022] The cosmetic according to any one of [1] to [4], wherein the component (C) is a powder selected from the group consisting of spherical silica, spherical starch powder, spherical calcium carbonate, spherical glass, and spherical cellulose. [6]

[0024] The cosmetic according to any one of [1] to [5], which further contains a component (D) of an oil. [7]

[0026] The cosmetic according to any one of [1] to [6], which further contains a component (E) of a coloring material. [8]

[0028] The cosmetic according to [7], wherein the component (E) is (E1) a pigment treated with an amino acid or a pigment treated with a metal soap. [9]

[0030] The cosmetic according to any one of [1] to [8], wherein

[0031] Based on the total mass of the aforementioned cosmetic,

[0032] the content rate of the component (A) is 20 to 50% by mass,

[0033] the content rate of the component (B) is 10 to 40% by mass, and

[0034] the content rate of the component (C) is 2 to 20% by mass.

[10]

[0036] The cosmetic according to any one of [1] to

[89] , wherein the ratio B / A of the content of the component (B) to the content of the component (A) is 0.2 to 2.

[11]

[0038] The cosmetic according to any one of [1] to

[10] , wherein, based on the total mass of the aforementioned cosmetic, the total content of the content of the component (A) and the content of the component (B) is 30 to 70% by mass.

[12]

[0040] The cosmetic according to any one of [1] to

[11] , wherein, based on the total mass of the cosmetic, the content rates of untreated talc and surface-treated talc are 0 to 5% by mass.

[13]

[0042] The cosmetic according to any one of [1] to

[12] , wherein, based on the total mass of the cosmetic, the content rate of the resin powder is 0 to 5% by mass.

[0043] According to the present invention, there is provided a powdery solid cosmetic having excellent usability and moldability. Detailed Description

[0044] [Powdery Solid Cosmetic]

[0045] The powdery solid cosmetic of the present invention comprises:

[0046] (A) Metal soap-treated plate-like powder,

[0047] (B) Amino acid-treated plate-like powder, and

[0048] (C) Non-elastic spherical powder.

[0049] Regarding each component contained in the cosmetic of the present invention, the description is as follows.

[0050] [(A) Metal soap-treated plate-like powder]

[0051] The powdery solid cosmetic of the present invention contains metal soap-treated plate-like powder (hereinafter, sometimes referred to as component (A)). The metal soap-treated plate-like powder refers to that obtained by subjecting plate-like powder to metal soap treatment.

[0052] The plate-like powder is a powder having an aspect ratio (average particle diameter / average thickness) greater than 1, for example, at least 5 or more. The aspect ratio is preferably 20 or more, more preferably in the range of 20 to 80, and further preferably in the range of 25 to 60.

[0053] In addition, the powder can be selected from various inorganic materials. Specifically, it can be selected from mica, synthetic mica, synthetic phlogopite mica, sericite, kaolin, alumina, barium sulfate, boron nitride, zinc oxide, silica, fish scale foil, bismuth oxychloride, etc. It should be noted that if the influence on the human body is considered, talc is preferably not selected.

[0054] In the present invention, metal soap-treated plate-like powders obtained by treating these powders with metal soaps are used. A metal soap refers to a salt formed by a carboxyl group-containing compound such as a fatty acid and a metal having a valence of 2 or more. Here, the carboxyl group-containing compound constituting the metal soap includes, for example, fatty acids having a linear or branched alkyl group, carboxyl-modified organosilicons, etc. Among them, higher fatty acids, that is, linear or branched carboxylic acids having 8 to 24 carbon atoms, preferably 12 to 18 carbon atoms, are preferred. Specific preferred examples of the higher fatty acids include stearic acid, isostearic acid, myristic acid, lauric acid, etc.

[0055] As the metal having a valence of 2 or more constituting the metal soap, there is no limitation, and preferred examples include alkaline earth metals such as calcium, magnesium, zinc, and trivalent metals such as aluminum.

[0056] That is, as examples of the metal soap preferably used as the surface treatment agent, there can be mentioned magnesium myristate, zinc myristate, aluminum myristate, magnesium stearate, zinc stearate, aluminum stearate, aluminum distearate, aluminum oleate, aluminum palmitate, aluminum laurate, aluminum myristate, dialuminum myristate, organosilicon metal soap (divalent or trivalent metal salt of an organosiloxane derivative having a terminal carboxyl group), etc.

[0057] In the present invention, as the component (A), those obtained by treating any plate-like powder with any metal soap can be used, and among these, metal soap-treated mica is preferred.

[0058] In the present invention, the content rate of the component (A) is not particularly limited, and based on the total mass of the cosmetic, the content rate of the component (A) is preferably 20 to 50% by mass, more preferably 25 to 45% by mass.

[0059] [(B) Amino acid-treated plate-like powder]

[0060] The solid cosmetic of the present invention simultaneously contains the component (A) and amino acid-treated plate-like powders (hereinafter sometimes referred to as the component (B)). The amino acid-treated plate-like powder refers to one obtained by treating a plate-like powder with an amino acid.

[0061] Regarding the plate-like powder, the plate-like powder exemplified as the component (A) can be used. In the present invention, amino acid-treated plate-like powders obtained by treating these powders with amino acids are used, and amino acid-treated mica is preferred.

[0062] The amino acid used in the amino acid treatment can be arbitrarily selected according to the purpose. It is considered that in the powder treated with an amino acid, the organic group of the amino acid is bonded to the powder surface via a nitrogen atom.

[0063] In the present invention, the amino acid preferably has an aliphatic group with a long chain. Specifically, N-monolauryl acyl basic amino acids or their salts are preferred. More specifically, N-lauroyl lysine, N-myristoyl lysine, N-stearoyl lysine, N-capryloyl lysine, N-behenoyl lysine, N-palmitoyl lysine, and their salts can be cited. From the aspect of ease of operation, N-lauroyl lysine or its salt is preferred. As salts, metal salts such as aluminum, zinc, magnesium, calcium, germanium, titanium, and zirconium are preferred.

[0064] When treating the plate-like powder, based on the mass of the plate-like powder, the mixing ratio of the amino acid or its salt is preferably 0.1 to 10% by mass. When it is less than 0.1% by mass, the water-repellent effect based on surface treatment is insufficient. In addition, even if it exceeds 10% by mass, the effect based on surface treatment will reach saturation, and it is likely to be economically disadvantageous.

[0065] Next, as the method for treating the powder, it can be either a dry method or a wet method, but the water-repellent effect based on surface treatment of the wet method is high. For the dry method, it is obtained by stirring and mixing or co-grinding the powder of the amino acid or its salt with an average particle size of 0.1 to 5 μm and the plate-like powder. The wet method is obtained as follows: after bringing the plate-like powder into contact with a solution in which the amino acid or its salt is dissolved in strongly acidic or strongly alkaline water, neutralization is carried out until near neutrality, and while causing the amino acid or its salt to precipitate on the powder surface, adhesion is carried out, and the salt generated by the neutralization process is removed by washing with water, and drying is carried out to obtain it.

[0066] In the present invention, the content rate of component (B) is not particularly limited. Based on the total mass of the cosmetic, the content rate of component (B) is preferably 10 to 40% by mass, more preferably 10 to 35% by mass.

[0067] In addition, the cosmetic of the present invention contains two types of plate-like powders, namely component (A) and component (B), but the feeling in use and the moldability are affected according to their mixing ratios. Therefore, the ratio B / A of the content of component (B) to the content of component (A) is preferably 0.5 to 2, more preferably 0.6 to 1.2.

[0068] [(C) Non-elastic spherical powder]

[0069] The solid cosmetic of the present invention further contains non-elastic spherical powder (hereinafter sometimes referred to as component (C)). The shape of component (C) must be spherical, but it does not need to be strictly a perfect sphere. For example, it can also be a sphere with an elliptical cross-section. Specifically, the aspect ratio is preferably less than 5. In terms of obtaining a more smooth and preferred touch when using the cosmetic, a perfect sphere is preferred.

[0070] The (C) component is inelastic. Specifically, preferably, the crushing strength per average particle is preferably 30 MPa or more, more preferably 35 MPa or more, and still more preferably 40 MPa or more. Moreover, the (C) component can be either inorganic spherical powder or organic spherical powder. The crushing strength per average particle in the present invention is a value obtained as follows: using a micro compression tester MCT-211 manufactured by Shimadzu Corporation, applying a load force to one particle of the sample at a certain increasing ratio, and calculating the strength at which the particle breaks. If the crushing strength is less than 30 MPa, the flexibility is excessively high, it is difficult to have sufficient molding strength, and moreover, the dispersibility of the powder cannot be sufficiently improved.

[0071] The average particle size of the (C) component is preferably in the range of 1 to 30 μm, more preferably in the range of 3 to 20 μm, and still more preferably in the range of 5 to 15 μm. If the average particle size is less than 1 μm, the smoothness when applying the cosmetic is lost, and if it exceeds 30 μm, there is a tendency to generate a frictional feeling and a rolling foreign body feeling.

[0072] Examples of the (C) component include spherical silica, spherical starch powder, spherical calcium carbonate, spherical glass, spherical cellulose, etc. From the viewpoint of usability, spherical silica is particularly preferred, and porous silica particles are further preferred. In addition, spherical glass can also improve usability, and the "removability" when forming a powder solid cosmetic is improved, so it is preferably used.

[0073] The content rate of the (C) component in the present invention is not particularly limited. Based on the total mass of the cosmetic, the content rate of the (C) component is preferably 2 to 20% by mass, and preferably 5 to 15% by mass.

[0074] [(D) Oil component]

[0075] The cosmetic of the present invention preferably further contains an oil component (hereinafter sometimes referred to as the (D) component) in addition to the (A) to (C) components. The oil component has the effects of improving the moldability of the powder solid cosmetic and also improving the usability.

[0076] The oil component that can be used in the present invention is not particularly limited as long as it is a commonly used one. Specifically, examples include liquid oils and fats, solid oils and fats, waxes, hydrocarbons, higher fatty acids, higher alcohols, synthetic ester oils, silicone oils, etc.

[0077] The content rate of the (D) component in the present invention is not particularly limited. When the cosmetic of the present invention contains the (D) component, based on the total mass of the cosmetic, the content rate of the (D) component is preferably 1 to 30% by mass, and preferably 2 to 10% by mass.

[0078] [(E) Coloring material]

[0079] In addition to components (A) to (D), the cosmetic of the present invention preferably further contains a coloring material (hereinafter sometimes referred to as component (E)). The coloring material is useful for the purpose of coloring the skin or the like with the cosmetic.

[0080] As the coloring material, it can be arbitrarily selected from those commonly used in cosmetics, but pigments are preferred. As pigments, for example, the following substances can be exemplified.

[0081] Organic pigments (such as Red No. 104, Red No. 202, Red No. 226, Yellow No. 4, Yellow No. 5, Blue No. 1, Black No. 401, etc.);

[0082] Lake pigments (such as Aluminum Lake Yellow No. 4, Aluminum Lake Blue No. 1, etc.);

[0083] Inorganic coloring pigments (such as iron oxide yellow, iron oxide red, iron oxide black, chromium oxide green, chromium hydroxide green, carbon black, ultramarine, Prussian blue, manganese violet, etc.);

[0084] Inorganic white pigments (such as zinc oxide, titanium dioxide (pigment grade), etc.);

[0085] Extender pigments (such as mica, sericite, etc.);

[0086] Other inorganic pigments (such as barium sulfate, magnesium carbonate, aluminum silicate, magnesium silicate, etc., aluminum oxide, etc.)

[0087] These pigments can be directly incorporated into the cosmetic of the present invention, but amino acid-treated pigments or metal soap-treated pigments obtained by the above-described amino acid treatment or metal soap treatment are more preferred. This is because the pigments further significantly exhibit the effects of the present invention by undergoing the same treatment as the plate-like powder.

[0088] [Other Components]

[0089] In the powdery solid cosmetic of the present invention, in addition to components (A) to (E), water, a surfactant, a pH adjuster, a humectant, a thickener, a dispersant, a stabilizer, a preservative, an antioxidant, a fragrance, a dye, etc. can be appropriately incorporated within the range of achieving the object of the present invention as needed. It should be noted that in the present invention, the content of untreated talc and surface-treated talc such as metal soap-treated talc is preferably low. Specifically, based on the total mass of the cosmetic, the content of untreated talc and surface-treated talc is preferably 0 to 5% by mass, and particularly preferably completely absent. Also, from the same viewpoint, the content of minute resin powders, so-called plastic microbeads, is preferably small. Specifically, based on the total mass of the cosmetic, the content of minute resin particles is preferably 0 to 5% by mass, and particularly preferably completely absent.

[0090] As the product form of the powder solid cosmetic of the present invention, all product forms within the category of powder cosmetics can be made. Specifically, it can be made into product forms such as foundation, eyeshadow, blush, talcum powder, aromatherapy powder, baby talcum powder, powder cake, deodorant powder, fragrant powder, etc.

[0091] Examples

[0092] Examples for further elaborating the present invention are listed below, but the present invention is not limited by any of these. The blending amount is expressed in mass% relative to the system in which the component is blended, unless otherwise specified.

[0093] [Examples 1 to 6, Reference Example 1, Comparative Examples 1 to 5]

[0094] Powder solid cosmetics with the compositions shown in Tables 1 and 2 below were manufactured, and the following items were evaluated. These results are also shown in Tables 1 and 2.

[0095] Usability and completion status

[0096] When 10 professional panel members applied the manufactured powder cosmetics to their faces, the usability during application (spreading on the skin, smoothness, no powdery texture) and the completed state (uniformity, no oiliness) were evaluated. The evaluation criteria are as described below.

[0097] A: More than 8 out of 10 panel members answered favorably.

[0098] B: More than 5 and less than 7 out of 10 panel members answered favorably.

[0099] C: Less than 4 out of 10 panel members answered favorably.

[0100] Moldability (impact resistance)

[0101] Each manufactured powder solid cosmetic was placed in a dedicated small housing and dropped from a certain height for evaluation. The evaluation was based on the number of times until the dropped formed object broke, and the evaluation criteria are as described below.

[0102] A: 7 times or more

[0103] B: More than 5 and less than 7 times

[0104] C: Less than 5 times

[0105] If the number of drops until breakage is 5 times or more, it is recorded as having good impact stability.

[0106] [Table 1]

[0107] Table 1

[0108]

[0109] [Table 2]

[0110] Table 2

[0111]

Claims

1. A powder solid cosmetic, comprising: (A) Metal soap-treated plate-like powder, (B) Amino acid-treated plate-like powder, and (C) Non-elastic spherical powder.

2. The cosmetic according to claim 1, wherein, (A) component is metal soap-treated mica.

3. The cosmetic according to claim 1 or 2, wherein (B) component is amino acid-treated mica.

4. The cosmetic according to claim 1 or 2, wherein (C) component is an inorganic spherical powder or an organic spherical powder with a crushing strength of 30 MPa or more per average particle.

5. The cosmetic according to claim 1 or 2, wherein (C) component is a powder selected from the group consisting of spherical silica, spherical starch powder, spherical calcium carbonate, spherical glass, and spherical cellulose.

6. The cosmetic according to claim 1 or 2, further comprising (D) an oil component.

7. The cosmetic according to claim 1 or 2, further comprising (E) a coloring material.

8. The cosmetic according to claim 7, wherein, (E) component is (E1) amino acid-treated pigment or metal soap-treated pigment.

9. The cosmetic according to claim 1 or 2, wherein taking the total mass of the cosmetic as a reference, the content rate of (A) component is 20 to 50% by mass, the content rate of (B) component is 10 to 40% by mass, and the content rate of (C) component is 2 to 20% by mass.

10. The cosmetic according to claim 1 or 2, wherein, The ratio B / A of the content of (B) component to the content of (A) component is 0.2 to 2.

11. The cosmetic according to claim 1 or 2, wherein, Taking the total mass of the cosmetic as a reference, the total content of the content of (A) component and the content of (B) component is 30 to 70% by mass.

12. The cosmetic according to claim 1 or 2, wherein Taking the total mass of the cosmetic as a reference, the content rate of untreated talc powder and surface-treated talc powder is 0 to 5% by mass.

13. The cosmetic according to claim 1 or 2, wherein, Taking the total mass of the cosmetic as a reference, the content rate of resin powder is 0 to 5% by mass.

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