Cosmetic product

Abstract

The objective of this invention is to provide a silicone-free cosmetic that is free not only from the surface treatment agent of the powder but also from silicone compounds in the cosmetic itself, wherein the powder of the silicone-free cosmetic has excellent dispersibility, a stable and clear appearance, and a pleasant feel when used. This invention relates to a cosmetic, characterized by comprising: (A) a powder that has been surface-treated with a surface treatment agent comprising at least two treatment agents, one of which is an N-acyl amino acid or a salt thereof; and (B) a surfactant selected from at least one of fatty acid polyglycerol esters, wherein the cosmetic does not contain silicone compounds.

Description

Technical Field

[0001] This invention relates to cosmetics that do not contain silicone compounds. More specifically, it relates to cosmetics, particularly color cosmetics, that do not contain silicone compounds, exhibit excellent stability, and provide a pleasant user experience. Background Technology

[0002] Silicone compounds, such as silicone oils, are not only suitable for hair-related cosmetics like shampoos, but also commonly used in skin-related cosmetics like foundations. Silicone compounds possess the following characteristics: high water repellency, non-stickiness, a lightweight feel, and good spreadability on hair and skin. Silicone compounds improve the water resistance, feel, and dispersibility of other ingredients in cosmetics containing them. Furthermore, silicone compounds are also widely used as surface treatment agents for powder components.

[0003] Silicone compounds offer the advantages mentioned above, but their high water repellency makes them difficult to remove with water and can burden the skin when used for cleansing. Furthermore, since silicone compounds are typically non-biodegradable, there are concerns about their long-term accumulation in the environment, potentially polluting it and disrupting ecosystems. Therefore, in recent years, cosmetics that do not contain silicone compounds and are marketed as "silicone-free" or "silicone-additive-free" have gained attention.

[0004] However, removing silicone compounds, which traditionally improve the dispersibility of powders and other ingredients in cosmetics, can lead to problems such as difficulty in maintaining the stability of the cosmetic. Furthermore, regarding powder surface treatment agents, solutions have been proposed that improve cleansing properties by using N-acyl amino acids instead of silicone compounds. Patent Document 1 describes an oil-in-water emulsion cosmetic formulated by combining powders surface-treated with N-acyl amino acids or their salts with a specific surfactant, which also exhibits excellent makeup longevity and cleansing properties.

[0005] However, although the cosmetic described in Patent Document 1 does not contain silicone compounds as surface treatment agents, it does contain silicone oil as a medium for cosmetics, and therefore is not considered a silicone-free cosmetic. When silicone oil is removed from the cosmetic described in Patent Document 1 to form a silicone-free cosmetic, the cosmetic tends to re-aggregate during storage, thus failing to achieve excellent powder dispersibility, a stable and clear appearance, and a pleasant feel when used.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent No. 6574613 Summary of the Invention

[0009] The problem the invention aims to solve

[0010] The objective of this invention is to provide silicone-free cosmetics that are not only surface treatment agents for powders but also cosmetics themselves, and that the silicone-free cosmetics have excellent powder dispersibility, do not re-aggregate over time, have a stable and clear appearance, and have a good tactile feel.

[0011] Solution for solving the problem

[0012] In order to solve the above-mentioned problems, the inventors have repeatedly conducted in-depth research and found that by combining powders (especially pigments) treated with specific surface treatment agents with surfactants of specific structures, stable cosmetics with excellent powder dispersibility, pigment color development and cosmetic feel (smoothness) can be obtained even without the use of silicone compounds. Thus, the present invention was completed.

[0013] This invention provides a cosmetic product, characterized in that it comprises:

[0014] (A) A powder having been surface-treated with a surface treatment agent comprising at least two treatment agents, one of which is an N-acyl amino acid or a salt thereof; and

[0015] (B) A surfactant selected from at least one of fatty acid polyglycerol esters.

[0016] The cosmetic does not contain silicone compounds.

[0017] The effects of the invention

[0018] The cosmetic of the present invention exhibits good and stable dispersibility of the powder even without the addition of silicone compounds. Furthermore, the powder (pigment) demonstrates excellent color rendering, and a smooth feel can be achieved even without the addition of organic polymer spherical powders. Detailed Implementation

[0019] (A)Powder

[0020] The powder (also referred to as "Component A") incorporated in the cosmetics of the present invention can be suitablely selected from powder components incorporated in cosmetics, provided that its surface has been treated with the surface treatment agent described below, and there are no particular limitations. The powder (A) in the present invention is preferably selected from white pigments containing titanium dioxide and zinc oxide, coloring pigments containing iron oxides such as Bengara, iron oxide yellow, and iron oxide black, talc, mica, sericite, synthetic phlogopite, and extender pigments containing barium sulfate, and ultraviolet scattering agents containing particulate titanium dioxide and particulate zinc oxide, etc.

[0021] The powder (A) in the cosmetic of the present invention is a powder obtained by surface treatment with a surface treatment agent containing at least two treatment agents, one of which is an N-acyl amino acid or a salt thereof. By using this powder that has been surface treated with a specific treatment agent, a cosmetic with excellent powder dispersibility, color development, and usability is obtained.

[0022] The "N-acyl amino acid or its salt" included in the surface treatment agent of this invention refers to a compound or its salt containing an acyl group condensed on the amino group of an amino acid, preferably a saturated fatty acid with 12 to 20 carbon atoms. The "amino acid" is preferably glutamic acid or aspartic acid. Examples of the "N-acyl group" include stearoyl and lauroyl. The "salt" can be selected from alkali metal salts such as sodium and potassium, alkaline earth metal salts, etc., with sodium salts being preferred. Specific examples include disodium stearoyl glutamate, sodium N-lauroyl glutamate, and sodium lauroyl aspartate.

[0023] In addition to the aforementioned "N-acyl amino acids or their salts", the surface treatment agent in this invention includes at least one other treatment agent. The "other treatment agent" is preferably selected from "amino acids", "esters", and "metal complexes of esters". "Amino acids" are not particularly limited, but are preferably selected from aspartic acid, glutamic acid, and lysine, with lysine being particularly preferred. "Ester" is a compound formed by the ester bond of a mono- or di-carboxylic fatty acid having 8 to 12 carbon atoms and a saturated fatty alcohol having 12 to 20 carbon atoms, wherein the alkyl chains of the aforementioned fatty acid and fatty alcohol can be straight or branched. Isostearyl sebacate monoester is particularly preferred. "Metal complexes of esters" refers to compounds in which an ester is coordinated to a metal atom; for example, triisostearic acid isopropoxytitanium salt is a preferred example.

[0024] As the powder (A) used in this invention, it is preferable to use a powder that has been surface-treated with a surface treatment agent comprising disodium stearoyl glutamate and isostearyl sebacate (NHS treatment agent), a surface treatment agent comprising sodium N-lauroyl glutamate and lysine (ASL treatment agent), or a surface treatment agent comprising sodium lauroyl aspartate and triisostearate isopropoxytitanium salt (ASI treatment agent). Among these, powders surface-treated with an NHS treatment agent or an ASL treatment agent are particularly preferred.

[0025] (A) Commercially available powders can also be used. Preferred commercially available powders include, for example, NHS-Chant CR-50, NHS-Red R516PS, NHS-Eero LL-100P, NHS-Black BL-100P, NHS-Micah M-102, NHS-Talc JA-46R, etc. (all manufactured by Miyoshi Chemical Industry Co., Ltd.), ASL-1TiO2CR-50, ASL-Red R516P, ASL-Eero LL-100P, ASL-Black BL-100P, etc., ASL-treated powders, ASI... TiO2CR-50, ASI-Red R516P, ASI-Eero LL-100P, ASI-Black BL-100P, ASI-Talc JA46R and other ASI-treated powders (all manufactured by Daito Kasei Corporation).

[0026] The cosmetic of the present invention can combine one or more of the powder (A) that has been treated with the aforementioned surface treatment agent, and the total amount of the powder is 0.5 to 40% by mass relative to the total amount of the cosmetic, preferably 5 to 30% by mass.

[0027] (B) Surfactants

[0028] The surfactant used in the cosmetic of the present invention (also referred to as "Component B") is selected from at least one type of fatty acid polyglycerol ester. The fatty acid constituting the fatty acid polyglycerol ester is preferably selected from monobasic (monohydroxy) fatty acids having 12 to 22 carbon atoms. For example, saturated monobasic fatty acids such as isostearic acid and unsaturated monobasic fatty acids such as ricinoleic acid are preferred, among which polymers of ricinoleic acid are particularly preferred.

[0029] As a fatty acid polyglycerol ester, it is preferable to select one with 3 to 8 repeating units of polyglycerol. In this invention, polyglycerol-6 polyricinoleate is particularly preferred as surfactant (B).

[0030] The amount of surfactant (B) in the cosmetic of the present invention can be appropriately determined according to the specific surface area, particle size and amount of the powder of component (A) mentioned above, and is usually 0.1 to 15% by mass relative to the total amount of cosmetic, preferably 0.5 to 10% by mass. If it is within the above range, a cosmetic with excellent powder dispersibility, no re-aggregation of powder over time, stable and clear appearance, and good touch can be obtained.

[0031] The cosmetics of the present invention are "silicone-free" cosmetics that do not contain silicone compounds.

[0032] In this specification, "silicone compounds" refers to compounds with an intramolecular siloxane structure (-Si-O-Si-) (e.g., silicones and siloxanes) and silanes (monosilanes, oligosilanes, polysilanes, and silane derivatives, such as alkylsilanes, alkoxysilanes, etc.), including silicone oils, organosilicon elastomers, organosilicon surfactants, and powders surface-treated with silicone compounds. It should be noted that silica (silicon dioxide) is not included in the "silicone compounds" of this invention.

[0033] The cosmetic of the present invention combines powder (A) treated with the above-mentioned specific surface treatment agent with the above-mentioned specific surfactant (B), and even when made into a silicone-free cosmetic, the powder has excellent dispersibility, a stable and clear appearance, and a good feel when used.

[0034] The cosmetic of the present invention can be formulated as an oil-in-water emulsion cosmetic, a water-in-oil emulsion cosmetic, or an oil-based liquid cosmetic, but the beneficial effects of the present invention are more easily exerted when formulated as an oil-in-water emulsion cosmetic, and therefore it is preferred.

[0035] Oil components that make up the oil phase include oils other than silicone oils, such as hydrocarbon oils, ester oils, higher alcohols with 12 to 22 carbon atoms, and fatty acids with 12 to 22 carbon atoms.

[0036] Examples of hydrocarbon oils include liquid paraffin, hydrogenated polyisobutylene and other liquid isoparaffins, heavy mobile isoparaffins, liquid ground paraffin, squalane, squalane, squalene, and volatile hydrocarbon oils (such as isododecane, isohexadecane, undecane, tridecane, etc.).

[0037] Examples of ester oils include isononyl isononanoate, isotriadecyl isononanoate, octyl dodecyl myristate, isopropyl myristate, isochetyl myristate, alkyl benzoate (C12-C15) esters, isopropyl palmitate, ethylhexyl palmitate, 2-hexyl decyl palmitate, di(2-ethylhexyl) sebacate, diisopropyl sebacate, diethylene glycol didecanoate, neopentyl glycol didecanoate, neopentyl glycol di(ethylhexanoate), diisostearate malate, triglyceride 2-ethylhexanoate, caprylic / capric triglyceride, etc.

[0038] Examples of higher alcohols with 12 to 22 carbon atoms include oleyl alcohol, 2-decyltetradecanool, dodecanool, isostearyl alcohol, and octyldodecanool. Examples of fatty acids with 12 to 22 carbon atoms include oleic acid, isostearic acid, linoleic acid, and linolenic acid.

[0039] In addition to the above, other ingredients commonly used in cosmetics may be incorporated into the cosmetics of the present invention, without hindering the effects of the present invention. Examples of other arbitrary ingredients include, for example, powders other than those mentioned in (A), surfactants other than those mentioned in (B), polymers, ultraviolet absorbers, antioxidants, fragrances, pigments, preservatives, bactericides, various pharmaceuticals, moisturizers, etc.

[0040] The powder other than that described in (A) is not particularly limited, but from the perspective of environmental protection in recent years, it is preferred to be free of plastic microbeads (MPB). "Plastic microbeads (MPB)" is narrowly defined as "synthetic, non-water-soluble solid plastic particles smaller than 5 mm that are intentionally incorporated into personal care products for the purpose of exfoliation and cleansing." However, in this specification, "MPB" refers to: including MPB in the narrow sense described above, as well as organic polymer spherical particles conventionally incorporated to improve the usability of cosmetics, and powders treated with polymerized surface treatment agents. The cosmetic of the present invention achieves a smooth feel when used by combining the aforementioned ingredients (A) and (B).

[0041] The cosmetics of the present invention can be manufactured according to conventional methods and can be formulated into dosage forms such as liquid, emulsion, paste, cream, gel, and solid.

[0042] The cosmetics of this invention can be provided as makeup base, foundation, concealer, blush, eyeshadow, mascara, eyeliner, eyebrow pencil, topical coating, lipstick and other color cosmetics; and skin care cosmetics such as sunscreen, but are suitable for color cosmetics, especially foundation.

[0043] Example

[0044] The present invention will be further described in detail below with reference to specific embodiments, but the present invention is not limited to these embodiments. Unless otherwise specified, the amount of a compound is expressed as a percentage by mass.

[0045] Prepare water-in-oil emulsion cosmetics using conventional methods according to Formula 1 or Formula 2 shown in Table 1 below.

[0046] [Table 1]

[0047] Volatile hydrocarbon oils 25 20 Isopropyl myristate - 3 Ethylhexyl methoxycinnamate - 2 Isostearic acid 1 - Diisostearin, lithium dimethylammonium montmorillonite 1 - Polyglycerol-2-diisostearate 4 4 Polyglycerol-6 polyricinoleate 0.7 0.7 Tocopherol 0.02 0.02 White pigment (*) 10 10 Yellow pigment (*) 1 1 Red pigment (*) 0.25 0.25 Black pigment (*) 0.1 0.1 micronized titanium dioxide 2 2 glycerin 1 1 1,3-BG 3 3 Sodium chloride 1 1 Phenoxyethanol 0.5 0.5 water margin margin total 100 100

[0048] As “pigments” (*) in Table 1, pigments treated with the surface treatment agents shown in Table 2 below were used to evaluate the powder dispersibility, color development, and usability (smoothness) of each cosmetic product. The evaluation results are shown in Table 2.

[0049] A: Good

[0050] B: Ordinary

[0051] C: Slightly worse

[0052] D: Poor

[0053] [Table 2]

[0054]

[0055] *1: NHS treated pigments (manufactured by Miyoshi Chemical Industry Co., Ltd.)

[0056] *2: ASL treated pigments (manufactured by Daito Kasei Corporation)

[0057] *3: ASI treated pigments (manufactured by Daito Kasei Corporation)

[0058] *4: LL-treated pigments (manufactured by Daito Kasei Corporation)

[0059] *5: NAI-treated pigments (manufactured by Miyoshi Chemical Industry Co., Ltd.)

[0060] As shown in Table 2, cosmetics containing pigments treated with a surface treatment agent comprising disodium stearoyl glutamate and isostearyl sebacate (NHS treatment), a surface treatment agent comprising sodium lauroyl glutamate and lysine (ASL treatment), or a surface treatment agent comprising sodium lauroyl aspartate and triisostearic acid isopropoxytitanium salt (ASI treatment), i.e., pigments treated with a surface treatment agent containing two or more treatment agents comprising N-acyl amino acids or their salts, exhibited excellent performance across all evaluated properties. Among these, cosmetics containing pigments treated with a surface treatment agent comprising disodium stearoyl glutamate and isostearyl sebacate (NHS treatment) or a surface treatment agent comprising sodium lauroyl glutamate and lysine (ASL treatment) possess particularly superior properties.

[0061] Next, oil-based liquid cosmetics were prepared using the formulations shown in Table 3 below according to conventional methods, and the powder dispersibility of each cosmetic was evaluated. The evaluation methods and property grades were the same as in Table 2. The evaluation results are shown in Table 3.

[0062] [Table 3]

[0063]

[0064] As shown in Table 3, when using either volatile hydrocarbon oils or non-volatile ester oils as the oil component in oil-based liquid cosmetics, good powder dispersibility can be obtained by combining a powder (A) with a specific surface treatment and a specific surfactant (B) (Examples 4 and 5). In contrast, in examples using surfactants other than the fatty acid polyglycerol esters of the present invention and in examples without added surfactants, dispersibility decreased (Comparative Examples 3-8). Furthermore, in examples where silicone compounds were used as the oil component, dispersibility was poor regardless of the type of surfactant (Comparative Examples 9-13).

[0065] Next, cosmetics were prepared using the formulations shown in Table 4 below, and the powder dispersibility, the feel (smoothness) upon application, and the stability of the emulsion over time (4 weeks) were evaluated. The evaluation method and grading of powder dispersibility were the same as in Tables 2 and 3. The feel (smoothness) upon application was evaluated by a panel of 5 professionals, and the number of "+" signs indicated the feel (smoothness). A higher number of "+" signs indicated a higher evaluation (where one "+" signifies a level that will not cause practical problems). The stability of the emulsion was assessed by visually observing any changes in appearance and by measuring any changes in viscosity using a Brookfield viscometer (BL type).

[0066] ○: No changes in appearance or viscosity were observed.

[0067] ×: Changes in appearance or viscosity were observed.

[0068] [Table 4]

[0069]

[0070] As shown in Table 4, Comparative Example 14, which used only polyglycerol-2 diisostearate as surfactant (B), was stable and usable without problems for several days immediately after preparation, but emulsification occurred after 4 weeks. Furthermore, Comparative Example 15, which used silicone oil, exhibited reduced powder dispersibility immediately after preparation, resulting in insufficient emulsification stability and an inability to obtain a cosmetic with a clear appearance. In contrast, Examples 6-9, which used polyglycerol-6 polyricinoleate, maintained excellent stability even after 4 weeks.

Claims

1. A cosmetic product, characterized in that, Include: (A) A powder that has been surface-treated by a surface treatment agent comprising at least two treatment agents, one of which is an N-acyl amino acid or a salt thereof; and (B) A surfactant selected from at least one of fatty acid polyglycerol esters. The powder (A) is a powder that has been surface-treated with a surface treatment agent containing disodium N-stearoyl glutamate and isostearyl sebacate, a powder that has been surface-treated with a surface treatment agent containing sodium N-lauroyl glutamate and lysine, or a powder that has been surface-treated with a surface treatment agent containing sodium lauroyl aspartate and triisostearate isopropoxytitanium salt. The surfactant (B) comprises polyglycerol-6 polyricinoleate, The cosmetics do not contain silicone compounds. The silicone compound is a compound with an intramolecular siloxane structure -Si-O-Si- and silanes, and does not contain silicon dioxide.

2. The cosmetic product according to claim 1, wherein, The powder (A) is a powder that has been surface-treated with a surface treatment agent containing disodium N-stearoyl glutamate and isostearyl sebacate, or a powder that has been surface-treated with a surface treatment agent containing sodium N-lauroyl glutamate and lysine.

3. The cosmetic product according to claim 1 or 2 is an oil-in-water emulsion cosmetic product.

4. The cosmetic product according to claim 1 or 2 is an oil-based liquid cosmetic product.

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