Solid cosmetic for lips

Abstract

The present invention addresses the problem of providing a solid cosmetic for lips having further improved transfer resistance (the effect of reducing secondary adhesion). The present invention relates to a solid cosmetic for lips, which is characterized by containing: (A) a coloring material that has been surface-treated with a treatment agent comprising an amino acid or a metal soap; (B) 15-50 mass% of at least one member selected from the group consisting of (b1) a copolymer containing a dimer acid ester and (b2) a dimer acid ester; (C) 20-70 mass% of a non-volatile hydrocarbon oil (c1) that separates when mixed with (B) at 25 DEG C or (c2) a phenyl-modified silicone that separates when mixed with (B) at 25 DEG C; and (D) a wax.

Description

Technical Field

[0001] The present invention relates to solid lip cosmetics. More specifically, it particularly relates to solid lip cosmetics having extremely excellent transfer resistance (effect of reducing secondary adhesion). Background Art

[0002] When makeup cosmetics such as lipsticks come into contact with tableware or clothing, the color sometimes transfers (secondary adhesion) to the contact object. Secondary adhesion not only causes the makeup color to adhere to the contact object, but also becomes a cause of makeup smudging. In particular, since the lips have a relatively high chance of coming into contact with tableware, lipsticks are prone to secondary adhesion. Therefore, cosmetics having a so-called effect of reducing secondary adhesion that suppresses color transfer caused by secondary adhesion have been developed (for example, refer to Patent Document 1).

[0003] The solid lip cosmetics described in Patent Document 1 contain: (a) 35 to 50% by mass of hydrogenated polyisobutene, (b) 20 to 60% by mass of one or more methylphenyl silicone oils that separate when mixed with component (a) at 25°C, (c) 1 to 20% by mass of neopentyl glycol dicaprate as a compatibility regulator for adjusting the compatibility of components (a) and (b), and (d) 3 to 12% by mass of wax (Claim 1). The solid lip cosmetics may further contain (e) a coloring material (Claim 2).

[0004] The solid lip cosmetics described in Patent Document 1 are prepared in a homogeneous single-phase state. However, when this cosmetic is applied to the lips, due to the shear force and / or pressure during application and when the lips rub against each other, (a) hydrogenated polyisobutene (sealing oil) and (b) methylphenyl silicone oil (exuding oil or coating oil) separate. While the sealing oil adheres to the skin (lips), the coating oil coats the sealing oil. The coloring material incorporated in the cosmetics is mainly incorporated in the sealing oil, so its upper part is coated with a colorless and transparent coating oil, thereby suppressing the secondary adhesion (color transfer) of the coloring material.

[0005] The solid lip cosmetics described in Patent Documents 2 and 3 use a copolymer containing a dimer acid ester and / or a dimer acid ester as the sealing oil, so there is no need to incorporate the (c) compatibility regulator (also called "compatibilizer" or "connecting oil") in Patent Document 1, and in addition to the effect of reducing secondary adhesion, the glossiness is also excellent.

[0006] However, since the sealing oil comes into contact with the coating oil, it is inevitable that a part of the coloring material transfers from the sealing oil to the coating oil. Therefore, it is impossible to completely suppress the transfer (secondary adhesion) of the coloring material transferred to the coating oil to the contact object.

[0007] Prior Art Documents

[0008] Patent Document

[0009] Patent Document 1: Japanese Patent No. 6242958 Gazette

[0010] Patent Document 2: Japanese Unexamined Patent Application Publication No. 2022-115395

[0011] Patent Document 3: Japanese Unexamined Patent Application Publication No. 2022-115396 Summary of the Invention

[0012] Problems to be Solved by the Invention

[0013] In view of the current state of the above technology, the subject of the present invention is to provide a solid lip cosmetic with further improved transfer resistance (effect of reducing secondary adhesion).

[0014] Solutions to the Problems

[0015] The inventors of the present invention conducted in-depth research to solve the above problems and found that: by treating the surface of the coloring material incorporated in the cosmetic with a specific surface treatment agent, it is possible to suppress the transfer of the coloring material from the sealing oil to the coating oil, and it is possible to further improve the transfer resistance (effect of reducing secondary adhesion), thus completing the present invention.

[0016] That is, the present invention provides a solid lip cosmetic, characterized by containing:

[0017] (A) A coloring material surface-treated with a treatment agent containing an amino acid or a metal soap;

[0018] (B) At least one selected from (b1) a copolymer containing a dimer acid ester and (b2) a dimer acid ester, 15 to 50% by mass;

[0019] (C) (c1) A non-volatile hydrocarbon oil that separates when mixed with (B) at 25°C or (c2) a phenyl-modified silicone that separates when mixed with (B) at 25°C, 20 to 70% by mass; and,

[0020] (D) Wax.

[0021] Effects of the Invention

[0022] The solid lip cosmetic of the present invention has excellent adhesion and glossiness by incorporating a copolymer containing a dimer acid ester and / or a dimer acid ester as the sealing oil. On this basis, by incorporating a coloring material subjected to a specific surface treatment, the transfer of the coloring material to the coating oil is suppressed, so it becomes a cosmetic with extremely excellent effect of reducing secondary adhesion (transfer resistance). Detailed Description of the Invention

[0023] The lip solid cosmetic of the present invention (hereinafter, also simply referred to as "cosmetic") contains: (A) a colorant surface-treated with an amino acid or a metal soap; (B) at least one selected from (b1) a copolymer containing a dimer acid ester and (b2) a dimer acid ester; (C) a (c1) non-volatile hydrocarbon oil or (c2) a phenyl-modified silicone that separates when mixed with (B) at 25°C; and (D) wax as an essential ingredient.

[0024] (A) Colorant

[0025] The "colorant" (also referred to as "Component A") incorporated in the cosmetic of the present invention includes a colorant surface-treated with a treating agent containing an amino acid or a metal soap.

[0026] The treating agent containing an amino acid is a surface-treating agent containing at least one amino acid or its derivative.

[0027] The "amino acid" is not particularly limited, and is preferably selected from aspartic acid, glutamic acid, lysine, proline, and sarcosine, and particularly preferably glutamic acid.

[0028] The "derivative of an amino acid" is preferably an N-acyl amino acid or its salt. The "N-acyl amino acid or its salt" refers to a compound or its salt in which an acyl group, preferably a saturated fatty acid having 12 to 20 carbon atoms, is condensed on the amino group of an amino acid. Examples of the "acyl group" include stearoyl, lauroyl, palmitoyl, and coconut oil acyl. The "salt" can be selected from alkali metal salts such as sodium and potassium, alkaline earth metal salts, etc., but preferably a sodium salt. Specific examples of the N-acyl amino acid salt include disodium N-stearoyl glutamate, sodium N-lauroyl glutamate, sodium lauroyl aspartate, sodium palmitoyl sarcosine, magnesium palmitoyl glutamate, etc., but are not limited thereto.

[0029] The treating agent containing an amino acid may also be a treating agent containing at least one other treating agent in addition to the "amino acid or its derivative". As the "other treating agent", it is preferably selected from "metal hydroxides", "lipids", and "esters". Examples of the "metal hydroxide" include aluminum hydroxide, etc., and examples of the "lipid" include higher fatty acids such as "palmitic acid". Examples of the "ester" include esters of a monovalent or divalent fatty acid having 8 to 12 carbon atoms and a saturated aliphatic alcohol having 12 to 20 carbon atoms. The alkyl chains of the aforementioned fatty acid and aliphatic alcohol may be linear or branched. As the "ester", isostearyl sebacate is particularly preferably used.

[0030] As the "treatment agent containing amino acids", examples thereof include a surface treatment agent containing sodium N-stearoylglutamate and aluminum hydroxide, a surface treatment agent containing sodium N-stearoylglutamate, isostearyl sebacate monoester and aluminum hydroxide, a surface treatment agent containing sodium lauroylglutamate lysine and magnesium chloride, a surface treatment agent containing palmitoylproline, sodium palmitoylsarcosinate, magnesium palmitoylglutamate and palmitic acid, etc. Among them, it is preferable to use a coloring material surface-treated with a treatment agent containing sodium N-stearoylglutamate and aluminum hydroxide or a treatment agent containing sodium N-stearoylglutamate, isostearyl sebacate monoester and aluminum hydroxide.

[0031] The treatment agent containing a metal soap is a surface treatment agent containing at least one metal soap.

[0032] "Metal soap" is a salt of a metal (excluding alkali metals) of a saturated or unsaturated higher fatty acid. Without particular limitation, as the higher fatty acid constituting the metal soap, saturated and / or unsaturated higher fatty acids having 8 to 24 carbon atoms, particularly 12 to 18 carbon atoms, such as stearic acid, isostearic acid, myristic acid, lauric acid, etc. can be cited. As the metal constituting the metal soap, salts such as aluminum, calcium, magnesium or zinc are preferable.

[0033] Specific examples of the metal soap which is suitably used as the surface treatment agent for the coloring material (component A) in the present invention include magnesium stearate, calcium stearate, zinc stearate, calcium laurate, zinc laurate, calcium ricinoleate, zinc ricinoleate, zinc octoate and aluminum myristate, etc.

[0034] The surface treatment based on the metal soap can be carried out by a method of surface-treating with a pre-generated metal soap. For example, it can be carried out by dissolving the metal soap in a volatile solvent such as isoparaffin or isopropyl alcohol, mixing with the base material powder (coloring material), and then volatilizing the volatile solvent. The surface treatment can also be carried out only by mixing the base material powder (coloring material) and the metal soap. Alternatively, the surface treatment can also be carried out by a method of complex treatment with a higher fatty acid (for example, stearic acid) constituting the metal soap and a hydroxide of a metal (for example, aluminum). As the surface treatment method, a wet method using a solvent, a gas phase method, a mechanochemical method, etc. can be used, without particular limitation.

[0035] The substance serving as the base material of the "coloring material" (Component A) is not particularly limited as long as it is a powdery coloring material. For example, inorganic white pigments (titanium dioxide, zinc oxide), inorganic red pigments (iron oxides (iron red), iron titanate), inorganic brown pigments (γ-iron oxide), inorganic yellow pigments (iron oxide yellow, yellow ocher), inorganic black pigments (iron oxide black, carbon black, low-valent titanium dioxide), inorganic purple pigments (manganese violet, cobalt violet), inorganic green pigments (chrome oxide green, chromium hydroxide green, cobalt titanate), inorganic blue pigments (ultramarine, Prussian blue), pearl powder pigments (mica coated with titanium dioxide, bismuth oxychloride coated with titanium dioxide, talc coated with titanium dioxide, mica coated with colored titanium dioxide, bismuth oxychloride, fish scale foil), metal powder pigments (aluminum powder, copper powder), organic pigments (Red No. 202, Red No. 205, Red No. 220, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 40, Blue No. 404), lake pigments of zirconium, barium, and aluminum (Red No. 3, Red No. 104, Red No. 227, Red No. 401, Orange No. 205, Yellow No. 4, Yellow No. 20, Green No. 3, Blue No. 1), natural pigments (chlorophyll, carotenoid series (β-carotene), carthamin, carminic acid, chalcone, curcumin, betanin, flavonol, flavone, proanthocyanidin, anthraquinone, naphthoquinone), functional pigments (boron nitride, photochromic pigment, synthetic fluorophlogopite, synthetic fluorophlogopite containing iron, fine particle composite powder (mixed fine powder)), etc. can be mentioned.

[0036] The coloring material (Component A) of the cosmetic of the present invention may be composed of one or more kinds of coloring materials surface-treated with a treating agent containing an amino acid, or may be composed of one or more kinds of coloring materials surface-treated with a treating agent containing a metal soap. Alternatively, a coloring material surface-treated with a treating agent containing an amino acid may be combined and blended with a coloring material surface-treated with a treating agent containing a metal soap. In addition, a coloring material surface-treated with a treating agent not containing an amino acid or a metal soap and an untreated coloring material may be further contained.

[0037] The blending amount of the coloring material (Component A) in the cosmetic of the present invention is preferably 0.1 to 15% by mass, more preferably 1 to 12% by mass, and still more preferably 4 to 10% by mass with respect to the total amount of the cosmetic. It should be noted that the coloring material surface-treated with a treating agent containing an amino acid or a metal soap preferably accounts for 50% by mass (mass ratio) or more, more preferably 60% by mass or more, and still more preferably 70% by mass or more with respect to the total amount of the coloring material (Component A) blended in the cosmetic.

[0038] The "Component B" (also referred to as "sealing oil") of the cosmetic of the present invention is at least one selected from (b1) a copolymer containing a dimer acid ester and (b2) a dimer acid ester.

[0039] (b1) A copolymer containing a dimer acid ester

[0040] The "copolymer containing a dimer acid ester" (hereinafter, also referred to as "Component b1") is a high-viscosity non-volatile ester oil. The copolymer containing a dimer acid ester (Component b1) is preferably selected to be compatible with the following (c1) non-volatile hydrocarbon oil at 90 °C and separated at 25 °C, and compatible with the following (c2) phenyl-modified silicone at 100 °C and separated at 25 °C.

[0041] Examples of the copolymer containing a dimer acid ester (Component b1) include polyglyceryl-2 isostearate / dilinoeate copolymer, and commercially available products such as HAILUCENT ISDA (manufactured by Advanced Alcohol Co., Ltd.).

[0042] (b2) A dimer acid ester

[0043] The dimer acid ester (hereinafter, also referred to as "Component b2") is an ester of a liquid fatty acid mainly composed of a dibasic acid of C36 dicarboxylic acid formed by dimerization of C18 unsaturated fatty acids using vegetable oils as a raw material, and containing a monobasic acid and a tribasic acid.

[0044] Examples of the dimer acid ester (Component b2) include hydrogenated castor oil dilinoleate, dilinol dilinoleate, etc. Examples of commercially available products include RISOCAST DA-L (manufactured by KOKYU ALCOHOL KOGYO CO., LTD.), LUSPLAN DD-DA (manufactured by Nippon Fine Chemical Co., Ltd.), etc.

[0045] The "Component B" (sealing oil) in the cosmetic of the present invention may be only either (b1) or (b2), or may contain both (b1) and (b2).

[0046] In the present invention, it is preferable to contain: (b1) a copolymer containing a dimer acid ester, and the blending amount of the copolymer containing a dimer acid ester (b1) is 50% by mass or more of the total amount of the "Component B" (sealing oil).

[0047] The blending amount of the "Component B" in the cosmetic of the present invention (the total blending amount of Component b1 and Component b2) is 15 to 50% by mass based on the total amount of the cosmetic. From the viewpoints of adhesion to the lips and persistence of the makeup effect, it is preferably 20 to 40% by mass, and more preferably 25 to 35% by mass.

[0048] The "C component" (also referred to as "coating oil") of the cosmetic of the present invention is (c1) a non-volatile hydrocarbon oil that separates when mixed with the "B component" at 25°C, or (c2) a phenyl-modified silicone that separates when mixed with the "B component" at 25°C.

[0049] (c1) A non-volatile hydrocarbon oil that separates when mixed with the "B component" at 25°C

[0050] The non-volatile hydrocarbon oil that separates when mixed with the "B component" at 25°C (hereinafter, also referred to as "non-volatile hydrocarbon oil" or "c1 component") is a non-volatile hydrocarbon oil that is liquid at room temperature and can be incorporated into cosmetics.

[0051] The "c1 component" of the present invention is a component that separates when mixed with a copolymer containing a dimer acid ester and a dimer acid ester (B) at 25°C and is compatible at 90°C.

[0052] "Separation" and "compatibility" in this specification are defined as follows.

[0053] "Separation": When the "B component" and the "c1 component" are heated to 90°C and stirred and mixed at (B):(c1)=1:1 (mass ratio), and then allowed to stand, when the mixture reaches 25°C, the case where the boundary is uniformly separated into two layers is recorded as "separation", and the case of a transparent state without a boundary is recorded as "not separated".

[0054] "Compatibility": When the "B component" and the "c1 component" are heated to 90°C and stirred and mixed at (B):(c1)=1:1 (mass ratio), the case where it becomes a transparent state where the boundary cannot be visually confirmed, that is, the "not separated state", is recorded as "compatible".

[0055] The non-volatile hydrocarbon oil (c1 component) has a viscosity of 100 mPa·s or less, preferably 50 mPa·s. When the viscosity exceeds 100 mPa·s, problems such as inability to form and aggregation of coloring materials may occur. It should be noted that the viscosity in the present invention is a value measured at 25°C using a B-type viscometer TVB-10M (manufactured by Toki Sangyo Co., Ltd.) with a rotor name M1 at 30 rpm.

[0056] Specific examples of the non-volatile hydrocarbon oil (c1 component) preferably include squalane, hydrogenated polyisobutene, hydrogenated polydecene, liquid paraffin, light isoparaffin, and heavy liquid paraffin. As commercially available products, for example, NOMCORTHP100 (manufactured by Nisshin OilliO Group, Ltd.), squalane (manufactured by KURARAY CO., LTD.), etc. can be cited.

[0057] (c2) A phenyl-modified silicone that separates when mixed with the "B component" at 25°C

[0058] A phenyl-modified silicone (hereinafter also referred to as "phenyl-modified silicone" or "c2 component") that separates when mixed with "Component B" at 25°C is a phenyl-modified silicone oil (liquid at normal temperature (25°C)) that can be incorporated into cosmetics. The phenyl-modified silicone (c2 component) in the present invention is a component that is compatible when mixed with the above-mentioned "Component B" at 100°C and separates at 25°C. For the definitions of "separation" and "compatibility", the measurement of "compatibility" is carried out at 100°C instead of 90°C, and the rest is as described above.

[0059] As the phenyl-modified silicone (c2 component) in the present invention, those having a viscosity of 300 mPa·s or less are preferred. When the viscosity exceeds 300 mPa·s, it is incompatible with the sealing oil at high temperatures, and sometimes the (D) wax described later cannot be uniformly dissolved and cannot be molded.

[0060] Specific examples of the phenyl-modified silicone (c2 component) include trimethylpentaphenyltrisiloxane, diphenylpolydimethylsiloxane, diphenylsilanoxyphenylpolymethyltrisiloxane, phenylpolymethyltrisiloxane, etc. Among these, trimethylpentaphenyltrisiloxane and diphenylsilanoxyphenylpolymethyltrisiloxane are preferred.

[0061] In the cosmetics of the present invention, it is preferred to use either (c1) non-volatile hydrocarbon oil or (c2) phenyl-modified silicone as the "C component" (coating oil). When using both (c1) non-volatile hydrocarbon oil and (c2) phenyl-modified silicone, from the viewpoint of the stability of the preparation, it is preferred to set the blending amount of (c2) phenyl-modified silicone to less than 5% by mass of the total amount of the cosmetics.

[0062] The blending amount of the "C component" (coating oil) in the cosmetics of the present invention is 20 to 70% by mass relative to the total amount of the cosmetics, preferably 30 to 55% by mass, and more preferably 35 to 50% by mass. When the blending amount of the "C component" is less than 20% by mass, it becomes difficult to separate during application, and when it exceeds 70% by mass, the blending amount of other components becomes too small, and it is difficult to obtain the effect of reducing secondary adhesion.

[0063] When using a non-volatile hydrocarbon oil (c1 component) as the "C component" (coating oil), it is preferred to set the blending ratio of "Component B" to "c1 component" (B:c1) to 1:0.5 to 1:4, more preferably 1:0.8 to 1:3.5, and further preferably 1:1 to 1:2. If within this range, "Component B" and "c1 component" are suitably compatible at 90°C and separate at 25°C.

[0064] When phenyl-modified silicone (C2 component) is used as the "C component" (coating oil component), it is preferable to set the mixing ratio of the "B component" to the "C2 component" (B:C2) to 1:0.5 to 1:4, and more preferably 1:0.8 to 1:3.5. If within this range, the "B component" and the "C2 component" are suitably compatible at 100°C and separated at 25°C.

[0065] (D) Wax

[0066] The wax (hereinafter also referred to as "D component") incorporated into the cosmetic of the present invention is not particularly limited as long as it is usually incorporated into cosmetics. The wax (D component) in the present invention is preferably a wax that is compatible with the "B component" and the "C component" at high temperature (90°C to 100°C) and separates at normal temperature (25°C).

[0067] Examples of the wax used in the present invention include carnauba wax, candelilla wax, polyethylene wax, sunflower seed wax, beeswax (Japanese: ビースワックス), ozokerite, microcrystalline wax, paraffin wax, sumac wax, beeswax (Japanese: ミツロウ), etc.

[0068] The mixing amount of the wax (D component) is preferably 5 to 15% by mass, and more preferably 7 to 12% by mass, based on the total amount of the cosmetic. When the mixing amount of the wax (D component) is 5% by mass or less, it may be difficult to solidify, and when it exceeds 15% by mass, the extensibility of the cosmetic deteriorates and it may become dull.

[0069] In addition to the above A to D components, other optional components commonly used in solid cosmetics can be incorporated into the lip solid cosmetic of the present invention within the range that does not impair the effects of the present invention. As the other optional components, there is no particular limitation, and examples include oil agents (excluding B to D components), powders (excluding A component), high molecular compounds, moisturizers, food flavors, antioxidants, preservatives, beauty components, etc.

[0070] Since the lip solid cosmetic of the present invention uses dimer acid esters as the adhesion oil component, it can be manufactured without incorporating a "compatibilizer" (or "linking oil component"). However, a compatibilizer can be incorporated as long as it does not hinder the effects of the present invention. Specific examples of the compatibilizer include diisostearyl malate, neopentyl glycol dicaprate, glyceryl tri(ethylhexanoate), pentaerythritol tetra(ethylhexanoate), caprylic / capric triglyceride, etc. When incorporating a compatibilizer, the mixing amount is preferably 20% by mass or less based on the total amount of the cosmetic.

[0071] The powders (excluding A component) include spherical powders and plate-like powders, etc.

[0072] Examples of spherical powders include spherical resin powders such as polymethyl methacrylate, organopolysiloxane elastomer, polystyrene, polyamide resin (nylon), polyethylene, copolymer of styrene and acrylic acid, benzoguanamine resin, polytetrafluoroethylene, and silicone resin.

[0073] Examples of plate-like powders include inorganic powders such as mica, synthetic mica, talc, sericite, alumina, magnesia, zirconia, magnesium carbonate, calcium carbonate, calcium sulfate, chromium oxide green, chromium hydroxide green, aluminum silicate, magnesium silicate, aluminum magnesium silicate, kaolin, silicon carbide, barium sulfate, bentonite, montmorillonite, boron nitride, etc., organic powders such as N-acyl lysine, and composite powders such as mica titanium coated with fine titanium dioxide, mica titanium coated with fine zinc oxide, and mica titanium coated with barium sulfate.

[0074] The blending amount of the powder (excluding component A) in the cosmetic of the present invention is preferably 30% by mass or less, more preferably 20% by mass or less, based on the total amount of the cosmetic.

[0075] The cosmetic of the present invention is manufactured by a method common to oil-based solid cosmetics. For example, each blending component is heated and stirred and mixed as needed, and then filled into a mold and slowly cooled, whereby it can be manufactured.

[0076] The cosmetic of the present invention is preferably provided in the form of a cosmetic for makeup, particularly a lip solid cosmetic having extremely excellent transfer resistance (effect of reducing secondary adhesion). Specifically, it is preferably provided in the form of lipstick, lip gloss, lip base for makeup, lip overcoat, lip cream, etc.

[0077] Examples

[0078] Hereinafter, examples are shown to explain the present invention in more detail, but the present invention is not limited to these examples. Regarding the blending amount, it means % by mass unless otherwise specified.

[0079] Lip solid cosmetics were prepared according to the formulations listed in Tables 1 to 3 below by a conventional method. Tables 1 and 2 are formulations using non-volatile hydrocarbon oil as the coating oil component, and Table 3 is a formulation using phenyl-modified silicone as the coating oil component.

[0080] The characteristics of the cosmetics of each example in Tables 1 to 3 were measured and evaluated by the following method.

[0081] (1) Moldability

[0082] For the cosmetics of each example, a panel of members evaluated the moldability when filled into a molding mold.

[0083] A: Can be well formed

[0084] B: Can be formed but insufficient in hardness

[0085] C: Cannot be formed due to non-hardening

[0086] (2) Aggregation of coloring material

[0087] For each example of the cosmetic, it was evaluated by the panel members through visual observation.

[0088] A: No aggregation of coloring material was observed

[0089] B: Aggregation of a part of the coloring material was observed

[0090] C: Aggregation of the coloring material occurred

[0091] (3) Appearance

[0092] For each example of the cosmetic, it was evaluated by the panel members through visual observation.

[0093] A: Has a uniform and transparent appearance

[0094] B: Some opaque parts were observed

[0095] C: Has a non-uniform appearance

[0096] (4) Effect of reducing secondary adhesion

[0097] The panel members actually used each example of the cosmetic and evaluated the presence (degree) of color transfer to the contact object through visual observation.

[0098] S: No secondary adhesion was observed at all

[0099] A: Almost no secondary adhesion

[0100] B: Slight secondary adhesion was observed

[0101] C: A lot of secondary adhesion was observed

[0102] -: Unable to measure

[0103] [Table 1]

[0104] Example 1 Example 2 Example 3 Comparative Example 1 Polyethylene wax / microcrystalline wax 10 10 10 10 Polyglycerol-2 isostearate / dimer dilinoleate copolymer 30 30 30 30 Squalane 55 55 55 55 Amino acid-treated iron oxide (*1) 5 - - - Amino acid-treated iron oxide (*2) - 5 - - Metal soap-treated iron oxide (*3) - - 5 - Silicone-treated iron oxide - - - 5 Red No. 202 - - - - Total 100 100 1o0 100 Moldability A A A A Aggregation of coloring material A A A A Appearance A A A A Effect of reducing secondary adhesion S S S A

[0105] (*1) Iron oxide treated with a treating agent containing disodium N-stearoylglutamate and aluminum hydroxide

[0106] (*2) Iron oxide treated with a treating agent containing disodium N-stearoylglutamate, isostearyl monosebacate and aluminum hydroxide

[0107] (*3) Iron oxide-based materials surface-treated with magnesium stearate

[0108] [Table 2]

[0109]

[0110] (*1) Iron oxide-based materials surface-treated with a treating agent containing disodium N-stearoylglutamate and aluminum hydroxide

[0111] (*2) Iron oxide-based materials surface-treated with a treating agent containing disodium N-stearoylglutamate, isostearyl monosebacate, and aluminum hydroxide

[0112] [Table 3]

[0113]

[0114] (*1) Iron oxide-based materials surface-treated with a treating agent containing disodium N-stearoylglutamate and aluminum hydroxide

[0115] Next, in order to quantify the improvement in the effect of reducing secondary adhesion, the following measurements were performed on the cosmetics of "Example 1" and "Comparative Example 1" in Table 1, and "Example 9" and "Comparative Example 2" in Table 3.

[0116] Apply 2.5 mg of each of the aforementioned cosmetics to artificial leather with an area of 4 cm 2 , bend the artificial leather with the coated surface on the inside, hold it with fingers and knead it 5 times, and let it stand for 5 minutes. Then, using an impact tester, gently tap the aforementioned coated area with filter paper 2 times, and measure the brightness (L value) of the filter paper with the cosmetics attached using a spectrophotometer CM-2600d (manufactured by KONICA MINOLTA, INC.). Based on the L values obtained for the cosmetics in each example, the difference in L values (ΔL) is obtained by subtracting the L value of the cosmetics containing an amino acid-treated coloring material (example) from the L value of the cosmetics containing a silicone-treated coloring material (comparative example), and this value is shown in Table 4.

[0117] The "L value" is a numerical value representing "brightness" in the Lab color space. The higher the "L value", the stronger the "whiteness", that is, it indicates that the cosmetics have not transferred to the filter paper.

[0118] [Table 4]

[0119]

[0120] As shown in Table 4, it was confirmed that in the case of using "(c1) non-volatile hydrocarbon oil" as the coating oil and in the case of using "(c2) phenyl-modified silicone", the examples in which the amino acid-treated coloring material was incorporated as (a) the coloring material suppressed color transfer compared to the comparative examples in which the silicone-treated coloring material was incorporated, and the difference value (ΔL) was significantly large. That is, it can be said that there is a significant difference between the "S" evaluation and the "A" evaluation in the evaluation results of Tables 1 to 3 above.

[0121] From the experimental results shown in Tables 1 to 3, it can be seen that by using an amino acid-treated coloring material or a metal soap-treated coloring material as the coloring material, even if the composition of the adhesion oil, the coating oil, the coloring material, or the wax is changed, secondary adhesion is significantly suppressed compared to the case where a silicone-treated coloring material is used.

[0122] It should be noted that when high-viscosity hydrogenated polyisobutene is used as the adhesion oil, the coloring material aggregates and cannot be molded (Comparative Example 3).

Claims

1. A solid lip cosmetic, characterized in that, Containing: (A) A coloring material surface-treated with a treating agent containing an amino acid or a metal soap; (B) At least one of 15 to 50% by mass selected from (b1) a copolymer containing a dimer acid ester and (b2) a dimer acid ester; (C) (c1) A non-volatile hydrocarbon oil that separates when mixed with (B) at 25°C or (c2) a phenyl-modified silicone that separates when mixed with (B) at 25°C, 20 to 70% by mass; and, (D) Wax.

2. The cosmetic according to claim 1, wherein, The coloring material (A) is a coloring material surface-treated with a treating agent containing an N-acyl amino acid.

3. The cosmetic according to claim 2, wherein, The N-acyl amino acid is N-stearoyl glutamate.

4. The cosmetic according to claim 1, wherein, The coloring material (A) is a coloring material surface-treated with a treating agent containing a metal soap.

5. The cosmetic according to claim 4, wherein, The metal soap is at least one selected from the group consisting of magnesium stearate, calcium stearate, zinc stearate, calcium laurate, zinc laurate, calcium ricinoleate, zinc ricinoleate, zinc octanoate, and aluminum myristate.

6. The cosmetic according to claim 1, wherein, The copolymer (b1) containing a dimer acid ester is a polyglycerol-2 isostearate / dimer dilinoleate copolymer.

7. The cosmetic according to claim 1, wherein, The dimer acid ester (b2) is selected from hydrogenated castor oil dimer dilinoleate and dilinoleyl dimer dilinoleate.

8. The cosmetic according to claim 1, wherein, The component (B) contains: (b1) a copolymer containing a dimer acid ester, and the blending amount of the copolymer (b1) containing a dimer acid ester is 50% by mass or more of the total amount of (B).

9. The cosmetic according to claim 1, wherein, The non-volatile hydrocarbon oil (c1) is selected from squalane, hydrogenated polyisobutene, hydrogenated polydecene, liquid paraffin, light isoparaffin, and heavy liquid paraffin.

10. The cosmetic according to claim 1, wherein, The phenyl-modified silicone (c2) is selected from trimethylpentaphenyltrisiloxane, diphenylpolydimethylsiloxane, and diphenylsilanoxy phenyl trimethylsiloxane.

Images