Cosmetics for keratin fibers

Abstract

The present invention addresses the problem of providing a cosmetic for keratin fibers that excels in separation effect, persistence of cosmetic effect, and curl maintenance effect, and achieves light lengthening without stickiness, which is a level of quality that is desired from cosmetics for keratin fibers, while also being easily removed with hot water. A cosmetic for keratin fibers according to the present invention, which has solved this problem, is characterized by including: (A) a dispersion of (A2) an alkyl acrylate / vinyl acetate copolymer, with (A1) a nonaqueous solvent serving as the dispersion medium; (B) a wax ester; (C) an organic modified clay mineral; and (D) a volatile oil.

Description

Technical Field

[0001] The present invention relates to a cosmetic for keratin fibers.

Background Art

[0002] The main effects required of a cosmetic for keratin fibers are to make the eyelashes appear thick and dense, thereby enhancing the beauty of the eye area. In particular, a separating effect that neatly finishes each eyelash, a curling effect that maintains the state of curling the eyelashes upward, and a beautiful finish with a light elongation without stickiness are important. In recent years, there has been a demand for a cosmetic effect that maintains the cosmetic film without the cosmetic coming off due to sweat or rain in bad weather. On the other hand, when removing a cosmetic with high persistence of these cosmetic effects, it is common to use a cleansing agent. However, cleansing agents are strongly irritating to the skin and remove the cosmetic while rubbing with the hand, which may impose a burden on the eyelashes and the surrounding skin. Therefore, there has been a demand for a cosmetic for keratin fibers that has high persistence of the cosmetic effect against sweat and rain and can be easily removed with hot water during bathing without using a cleansing agent. For example, as in Patent Document 1, there is a technology for an eyelash cosmetic containing an alkyl acrylate / vinyl acetate copolymer and a triester phosphate, which is excellent in the persistence of the cosmetic effect, water resistance, and cleansing property with hot water. Also, as in Patent Document 2, there is a technology for a keratin eyelash cosmetic containing an alkyl acrylate / vinyl acetate copolymer emulsion, an alkyl acrylate copolymer emulsion, carbon black, a polyhydric alcohol, and polyvinylpyrrolidone, which is excellent in cleansing property against warm water and gloss and blackness that impress the eye area. Further, as in Patent Document 3, there is a technology for an eyelash cosmetic that combines an oil-soluble film-forming agent, a nonionic surfactant with an HLB value of 7 to 10, a volatile oil agent, and a non-volatile oil agent, and is excellent in volume effect, curling effect, persistence of the curling effect, persistence of the cosmetic effect (at room temperature), and removability with warm water (40°C).

Prior Art Documents

Patent Documents

[0003] Patent Document 1 Japanese Unexamined Patent Application Publication No. 2013-139397 Patent Document 2 Japanese Unexamined Patent Application Publication No. 2010-77042 Patent Document 3 Japanese Unexamined Patent Application Publication No. 2017-125000 Summary of the Invention Problems to be Solved by the Invention

[0004] However, in the eyelash cosmetic containing an alkyl acrylate / vinyl acetate copolymer obtained in Patent Document 1 or 2, although it is excellent in water resistance, cleansing property (40°C water), and durability of the makeup effect, when using an alkyl acrylate / vinyl acetate copolymer in the form of an emulsion containing the exemplified water, stickiness may easily occur. Attention has not been paid to the non-sticky light spreading, curl maintaining effect, and separating effect, which are important for the finished quality of the eyelash cosmetic. Also, in the eyelash cosmetic of Patent Document 3, attention has not been paid to the separating effect and the non-sticky light spreading.

[0005] An object of the present invention is to provide a cosmetic for keratin fibers that is excellent in separating effect, durability of the makeup effect, curl maintaining effect, has a non-sticky light spreading, and is easily removable with hot water. Means for Solving the Problems

[0006] Under such circumstances, as a result of intensive research, the present inventor has found that by combining an acrylic acid alkyl / vinyl acetate copolymer dispersion using a non-aqueous solvent as a dispersion medium, a wax ester, an organically modified clay mineral, and a volatile oil, a flexible cosmetic film that easily adheres to the eyelashes can be formed. This cosmetic film not only has excellent separation effect, but also can impart a long-lasting curling effect. Furthermore, it is non-greasy, smoothly spreads under a small shear stress, is easily removed with hot water, and has excellent persistence of the cosmetic effect. Based on these findings, the present invention has been completed.

[0007] That is, the present invention includes the following. [1] The following components (A) to (D); (A) (A1) A dispersion of an acrylic acid alkyl / vinyl acetate copolymer using a non-aqueous solvent as a dispersion medium (A2) (B) Wax ester (C) Organically modified clay mineral (D) Volatile oil A cosmetic for keratin fibers containing the same. [2] The cosmetic for keratin fibers according to [1] above, wherein the acrylic acid alkyl / vinyl acetate copolymer as component (A2) is a copolymer obtained by copolymerizing an alkyl (meth)acrylate and vinyl acetate in a mass ratio range of 30:70 to 95:5. [3] The cosmetic for keratin fibers according to [1] or [2] above, wherein the content of the component (A) is 0.4 to 15% by mass in terms of solid content. [4] The cosmetic for keratin fibers according to any one of [1] to [3] above, wherein the mass ratio of the contents of the component (A2) and (B) is (A2) / (B)=0.02 to 1.5. [5] The cosmetic for keratin fibers according to any one of [1] to [4] above, wherein the Tg of the polymer of the alkyl (meth)acrylate constituting the acrylic acid alkyl / vinyl acetate copolymer as component (A2) is 20 to 50°C. [6] The cosmetic for keratin fibers according to any one of [1] to [5] above, wherein the number average molecular weight of the acrylic acid alkyl / vinyl acetate copolymer as component (A2) is 50,000 to 500,000. [7] The cosmetic for keratin fibers according to any one of [1] to [6] above, wherein the component (B) contains a wax ester (B1) having a melting point of 40°C or higher and less than 70°C and a wax ester (B2) having a melting point of 70 to 90°C. [8] The cosmetic for keratin fibers according to any one of [1] to [7] above, wherein the non-aqueous solvent of the component (A1) is a volatile hydrocarbon oil.

Effects of the Invention

[0008] The cosmetic for keratin fibers of the present invention is excellent in separation effect, persistence of cosmetic effect, curl retention effect, has a light and non-greasy spread, and is further excellent in ease of removal with hot water.

Modes for Carrying Out the Invention

[0009] Hereinafter, the present invention will be described in detail. In this specification, "~" means a range including the numerical values before and after it, and "%", unless otherwise specified, refers to mass%.

[0010] The component (A) used in the present invention is a dispersion in which an alkyl acrylate / vinyl acetate copolymer (A2) is dispersed in a non-aqueous solvent (A1).

[0011] The alkyl acrylate / vinyl acetate copolymer (A2) corresponds to the ingredient listed as ACRYLATES / VA COPOLYMER in the INCI name (International Nomenclature Cosmetic Ingredient labeling names). Component (A) is obtained by copolymerizing an alkyl (meth)acrylate and vinyl acetate. As the alkyl (meth)acrylate, one or more alkyl (meth)acrylates having 1 to 4, 8, or 12 carbon atoms in the alkyl group are used. In the present invention, although not particularly limited, from the viewpoints of ease of removal with hot water and persistence of the cosmetic effect, the mass ratio of alkyl (meth)acrylate to vinyl acetate that constitutes component (A2), i.e., alkyl (meth)acrylate / vinyl acetate, has a lower limit value that is preferably 0.4 or more, more preferably 0.6 or more, still more preferably 0.8, and an upper limit value that is preferably 20 or less, more preferably 2.5 or less, still more preferably 1.5 or less. Alternatively, the mass ratio of alkyl (meth)acrylate to vinyl acetate is preferably 30:70 to 95:5 (alkyl (meth)acrylate:vinyl acetate), and more preferably in the range of 40:60 to 70:30. When the proportion of alkyl (meth)acrylate is within the above range, it is easily dispersed in the non-aqueous solvent (A1), the persistence of the cosmetic film, etc. are high, and it is excellent in ease of removal with hot water.

[0012] The number average molecular weight of component (A2) is not particularly limited, but from the viewpoints of the separating effect and the curl maintaining effect, it is preferably 50,000 to 500,000, and more preferably 50,000 to 300,000. The number average molecular weight is a polystyrene equivalent value determined by gel permeation chromatography. Among the monomers that constitute component (A2), the Tg of the polymer obtained by polymerizing only alkyl (meth)acrylate is not particularly limited, but from the viewpoints of ease of removal with hot water and the curl persistence effect, the lower limit is preferably 10°C or more, more preferably 15°C or more, still more preferably 20°C or more, and the upper limit is preferably 50°C or less, more preferably 40°C or less. When it is within this range, in addition to the ease of removal with hot water and the curl persistence effect, it is excellent in the separating effect and the persistence of the cosmetic effect, and can enhance the light spreading effect without stickiness.

[0013] Examples of the non-aqueous solvent (A1) that is the dispersion medium of the component (A) include organic solvents and silicone-based solvents that can be contained in cosmetics. Among these, from the viewpoints of the separation effect and a light spreading property without stickiness, volatile hydrocarbon oils, fatty acid esters, fatty acids, silicone oils, etc. are preferable, and volatile hydrocarbon oils are more preferable. The volatile hydrocarbon oil is a hydrocarbon having a boiling point of 260°C or lower at normal pressure. For example, isooctane (2,2,4-trimethylpentane, 2,3-dimethylhexane, etc.), isododecane (2,2,4,6,6-pentamethylheptane, etc.), isohexadecane, hydrocarbons having side chains such as isoeicosene, isoparaffin, or mixtures thereof, isobutene, n-butene, etc. after polymerization or copolymerization (the degree of polymerization is preferably 4 to 6) and then hydrogenated, etc. can be mentioned, and one kind or a combination of two or more kinds can be used as necessary. Among these, isododecane is preferable from the viewpoints of the separation effect and a light spreading property without stickiness.

[0014] The fatty acid ester of component (A1) is not particularly limited, but from the viewpoints of the separation effect and a light spreading property without stickiness, those in which the alkyl group of the fatty acid constituting them has 4 to 24 carbon atoms are preferable, and those having 6 to 20 carbon atoms are more preferable. As suitable fatty acid esters, for example, neopentyl glycol di(2-ethylhexanoate), diethylhexyl succinate, ethylhexyl palmitate, isopropyl myristate, dimer dilinoleyl hydrogenated rosin condensate, glyceryl tri(caprylate / caprate), cetyl 2-ethylhexanoate, neopentyl glycol dicaprate, propylene glycol dicaprate, isotridecyl isononanoate, glyceryl tri(2-ethylhexanoate), diisostearyl malate, pentaerythritol tetra(2-ethylhexanoate), polyglyceryl-10 deca(2-ethylhexanoate), ethylhexyl hydroxystearate, tritridecyl trimellitate, dipentaerythrityl hexaisononanoate, diglyceryl triisostearate and the like can be exemplified, and one or more of these can be used. Among these, neopentyl glycol di(2-ethylhexanoate), diethylhexyl succinate, ethylhexyl palmitate, isopropyl myristate, dimer dilinoleyl hydrogenated rosin condensate, glyceryl tri(caprylate / caprate), cetyl 2-ethylhexanoate, neopentyl glycol dicaprate, propylene glycol dicaprate, isotridecyl isononanoate, glyceryl tri(2-ethylhexanoate), diisostearyl malate are more preferable.

[0015] As the fatty acid of component (A1), branched fatty acids or fatty acids with low crystallinity such as unsaturated fatty acids are preferable, and isostearic acid, isopalmitic acid, oleic acid and the like can be exemplified.

[0016] Examples of the silicone oil of component (A1) include phenyl-modified silicones such as diphenylsiloxyphenyltrimethicone and diphenyldimethylsilicone, and non-volatile oils such as dimethylpolysiloxane. In addition, examples of the volatile silicone oil include dimethylpolysiloxane, methyltrimethicone, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc. Examples of commercially available products include DC345 FLUID, SH245 FLUID (manufactured by Toray Dow Corning Co., Ltd.), KF-995, TMF1.5, silicone KF-96L-1.5CS, KF-96L-2CS (all manufactured by Shin-Etsu Chemical Co., Ltd.), BELSIL DM 1 PLUS (manufactured by Wacker Chemical Corporation), etc. As the volatile silicone oil, those with a boiling point of less than 250°C are preferable from the viewpoint of drying rate. For example, methyltrimethicone and dimethicone are preferably used.

[0017] Since component (A2) is in a dispersion state in component (A1), it is preferable to use a component in which (A2) is in a particulate state. In this state, (A2) does not adhere to the surface and is likely to adhere at points in the cosmetic film, being excellent in the separating effect, the persistence of the cosmetic effect, and the curl maintaining effect, while enhancing flexibility and imparting a light stretch without stickiness, which is preferable. The average particle diameter of the particles is not particularly limited, but is preferably 0.1 to 2 μm particularly from the viewpoints of the separating effect and the light stretch without stickiness. The average particle diameter of the dispersion is determined by the following method using the laser diffraction method. Collect 5 mL of component (A) into a glass cell with a length of 5 mm, a width of 65 mm, and a height of 80 mm using a Pasteur pipette, and set it in a laser diffraction / scattering type particle size distribution measuring device [LA-910A manufactured by Horiba, Ltd.]. After adjusting the concentration of component (A) so that the transmittance of the laser light (red) is 80% to 90%, the average particle diameter of the resin particles in the non-aqueous dispersion is determined by subjecting the measurement results under the condition of a measurement temperature of 25°C ± 1°C to computer processing, and the value of the volume average (D50) is taken as the average particle diameter.

[0018] Component (A) can be obtained by a known method. For example, in addition to the method of polymerizing an alkyl (meth)acrylate and vinyl acetate in a non-aqueous solvent, it can also be produced by dispersing a prepared alkyl acrylate-vinyl acetate copolymer in a non-aqueous solvent. The mass ratio of the non-aqueous solvent (A1) to the alkyl acrylate-vinyl acetate copolymer (A2) in component (A) ((A2) / (A1)) is preferably 1.5 or less, more preferably 1.0 or less, from the viewpoints of the separation effect and a light spreading without stickiness. Examples of commercially available products of component (A) include Nisseki U-3712A (manufactured by Nippon Carbide Industries Co., Ltd.), etc. The number average molecular weight and average particle size of the alkyl acrylate-vinyl acetate copolymer (A2) contained therein are within the ranges of the above number average molecular weight and average particle size.

[0019] The content of component (A) in the cosmetic for keratin fibers of the present invention is not particularly limited. However, from the viewpoints of the separation effect, curl retention effect, a light spreading without stickiness, the persistence of the cosmetic effect, and the ease of falling off in hot water, the lower limit in the cosmetic in terms of solid content conversion (content of (A2)) is preferably 0.4% or more, more preferably 1.5% or more, still more preferably 3% or more. The upper limit is preferably 15% or less, more preferably 9% or less, still more preferably 7% or less.

[0020] The wax ester of component (B) of the present invention has polarity as a solid content. In order to impart appropriate adhesion to the eyelashes, by combining with components (A), (C), and (E), it can impart hardness and viscosity without hindering the ease of falling off in hot water, and can impart a high separation effect and curl retention effect to the eyelashes.

[0021] The wax ester of component (B) of the present invention is not particularly limited as long as it is a solid oil derived from animal oils, vegetable oils, synthetic oils, etc. usually contained in cosmetics. For example, hard lanolin, beeswax, stearyl stearate, montan wax, carnauba wax, hydrogenated jojoba oil, behenyl behenate, candelilla wax, sunflower seed wax, rice bran wax, etc. can be used alone or in combination of two or more as needed.

[0022] Although the content of component (B) in the present invention is not particularly limited, from the viewpoints of the persistence of the makeup effect, the separating effect, the curl persistence effect, ease of removal with hot water, and excellent light spreading without stickiness, the lower limit is preferably 4% or more, more preferably 6% or more, and still more preferably 8% or more. As the upper limit, 25% or less is preferable, 20% or less is more preferable, and 15% or less is still more preferable.

[0023] Among these, for the wax ester of component (B), from the viewpoint of obtaining a product that is even more excellent in terms of ease of removal with hot water, the separating effect, and the curl persistence effect, it is preferable to use a wax ester (B1) having a melting point of 40°C or higher and lower than 70°C and a wax ester (B2) having a melting point of 70 to 90°C in combination. Examples of (B1) include hard lanolin, beeswax, stearyl stearate, etc., and examples of (B2) include montan wax, carnauba wax, hydrogenated jojoba oil, behenyl behenate, candelilla wax, sunflower seed wax, rice bran wax, etc. From the viewpoint of obtaining a product that is even more excellent in achieving both the curl persistence effect and ease of removal with hot water, preferably both (B1) and (B2) are waxes derived from animal or vegetable oils. Among them, (B1) is preferably beeswax, and (B2) is preferably carnauba wax.

[0024] Also, in component (B), from the viewpoints of the persistence of the makeup effect, the separating effect, the curl persistence effect, light spreading without stickiness, and ease of removal with hot water, the lower limit of the mass ratio (B1) / (B2) of these contents is preferably 0.2 or more, more preferably 0.5 or more, and still more preferably 0.75 or more. The upper limit is preferably 5 or less, more preferably 2 or less, and still more preferably 1.25 or less.

[0025] In the present invention, the content mass ratio of component (B) and component (A2) is not particularly limited. However, from the viewpoints of curl persistence effect, ease of removal with hot water, and non-sticky and light spreading, the lower limit of the content mass ratio (A2) / (B) in the cosmetic is preferably 0.02 or more, more preferably 0.1 or more, and still more preferably 0.25 or more. The upper limit is preferably 1.5 or less, more preferably 1.2 or less, and still more preferably 0.8 or less.

[0026] By combining the organically modified clay mineral used as component (C) of the present invention with components (A), (B), and (D), the liquid components are gelled, separation and waste liquid are suppressed, the components are made uniform and the usability is stabilized, and at the same time, appropriate viscosity is imparted, and effects such as a separating effect and non-sticky and light spreading are obtained.

[0027] The organically modified clay mineral used as this component (C) is not particularly limited as long as it is generally used in cosmetics, and any of them can be used. Specifically, it is obtained by ion-exchanging a water-swellable clay mineral with a cationic surfactant such as an alkyl quaternary ammonium salt. In the present invention, those exchanged with benzyl dimethyl stearyl ammonium ions and those exchanged with dimethyl distearyl ammonium ions are particularly preferable in terms of improving the stability over time and contributing to non-sticky and light spreading. The water-swellable clay mineral is a kind of colloidal hydrous aluminum silicate having a three-layer structure, and generally has the following general formula (1) (X,Y) 23 (Si,Al) 4 O 10 (OH) 2 Z·nH 2 O···(1) In the formula, X = Al, Fe, Mn, Cr Y = Mg, Fe, Ni, Zn, Li Z = K, Na, Ca It is represented by [the formula], and specifically includes montmorillonite groups such as natural or synthetic (in this case, those in which (OH) in the above general formula is substituted with fluorine) montmorillonite, laponite, and hectorite, and synthetic mica known as sodium silicic mica, sodium or lithium teniolite, etc. Among them, montmorillonite and hectorite are particularly preferable in terms of non-sticky and light spreading elongation. Examples of commercially available products of such organically modified clay minerals include BENTONE 27 BC, BENTONE 38 BC, BENTONE 27V BC, BENTONE 38V BC (all manufactured by Elementis), LUCENTITE SAN, LUCENTITE SAN-P (all manufactured by Coop Chemical). In addition, other water-swellable clay minerals, for example, vermiculite treated with a cationic compound and then used in the present invention as an organically modified clay mineral with an arbitrary modification rate may also be used. Furthermore, it is also possible to separately contain these water-swellable clay minerals and cationic compounds and make them into organically modified clay minerals within the system of the water-in-oil emulsion cosmetic of the present invention. These component (C) organically modified clay minerals can also be used alone or in combination of two or more.

[0028] The content of the component (C) organically modified clay mineral contained in the present invention is not particularly limited. However, from the viewpoints of non-sticky and light spreading elongation due to high thixotropy, separation effect, and curl persistence effect, the lower limit is preferably 1% or more, more preferably 3% or more, and still more preferably 4% or more. As the upper limit, 9% or less is preferable, 7% or less is more preferable, and 6% or less is still more preferable. It is preferable to set a content that is not easily wasted according to the contents of component (A1) and component (D).

[0029] The volatile oil used as component (D) of the present invention, when combined with components (A) to (C), imparts a non-greasy, light spreading property, and by accelerating volatilization after application, strengthens the cosmetic film, thereby improving the durability of the cosmetic effect, the curl retention effect, etc. The volatile oil as component (D) is not particularly limited as long as it is usually used in cosmetics, and examples include the volatile hydrocarbon oil and volatile silicone oil described in component (A1). Particularly from the perspective of the dispersibility of component (A) with respect to (A2), it is preferable to use a hydrocarbon-based volatile oil. Examples of these commercial products include ISODODECANE (manufactured by IMCD), IP Solvent 1620MU, IP Solvent 2028MU (all manufactured by Idemitsu Kosan Co., Ltd.), etc., and one or more of these can be used.

[0030] The total content of the volatile oil in component (A1) and the volatile oil of component (D) contained in the present invention (hereinafter referred to as [(volatile oil in (A1) + (D))]) is not particularly limited, but from the perspectives of non-greasy, light spreading property, durability of the cosmetic effect, and curl retention effect, the lower limit is preferably 45% or more, more preferably 48% or more, and still more preferably 50% or more. As the upper limit, 66% or less is preferable, 64% or less is more preferable, and 62% or less is still more preferable.

[0031] In the present invention, the content mass ratio of [(volatile oil in (A1) + (D))] and component (C) is not particularly limited, but from the perspectives of the separation effect, non-greasy, light spreading property, and curl retention effect, the lower limit of the content mass ratio [(volatile oil in (A1) + (D))] / (C) in the cosmetic is preferably 5.8 or more, more preferably 7.8 or more, and still more preferably 9 or more. The upper limit is preferably 13.2 or less, more preferably 12.8 or less, and still more preferably 12.2 or less.

[0032] In the keratin cosmetic of the present invention, by further containing dextrin fatty acid ester as component (E), it is easy to conform to component (B), brings an effect of controlling crystallization, is excellent in the effect of hardening component (A1) and component (D), and can obtain a high effect regarding ease of removal with hot water and a light spreading without stickiness. The dextrin fatty acid ester as component (E) used in the present invention is an ester of dextrin and preferably a higher fatty acid having 8 to 22 carbon atoms. Specifically, dextrin octanoate, dextrin laurate, dextrin palmitate, dextrin myristate, dextrin stearate, dextrin behenate, palm oil fatty acid dextrin, (palmitic acid / octanoic acid) dextrin, isostearic acid dextrin, etc. can be mentioned. Among these, those containing a large amount of linear saturated fatty acid in the acyl group are preferable, and dextrin palmitate is more preferable from the viewpoints of shape stability and usability, and can be more excellent in light spreading without stickiness, persistence of cosmetic effect, curl maintaining effect, etc. Commercially available products of these dextrin fatty acid esters include, for example, "Leopal KL2", "Leopal TT2", "Leopal TL2" (above, manufactured by Chiba Flour Milling Co., Ltd.), etc.

[0033] The content of the dextrin fatty acid ester as component (E) contained in the present invention is not particularly limited, but from the viewpoints of separation effect and light spreading without stickiness, the lower limit is preferably 2% or more, more preferably 3% or more, and still more preferably 4% or more. As the upper limit, 10% or less is preferable, 8% or less is more preferable, and 6% or less is still more preferable.

[0034] In addition to the above components (A) to (E), the keratin fiber cosmetic of the present invention can contain oily components, inorganic pigments, organic pigments, powders such as dyes, surfactants, fibers, polyhydric alcohols, water-soluble polymers, water-soluble film-forming resins, aqueous components such as humectants, saccharides, ultraviolet absorbers, anti-fading agents, antioxidants, defoaming agents, beauty components, preservatives, fragrances, etc. within a range that does not interfere with the effects of the present invention.

[0035] The oily components are those other than component (A), component (B) and component (D), and any oil commonly used in cosmetics can be used without particular limitation. Regardless of the properties of solid oils, semi-solid oils, and liquid oils of animal, vegetable, synthetic oil, etc. origins, hydrocarbons, fats and oils, ester oils, fatty acids, higher alcohols, fluorine-based oils, etc. can be used. Among them, when hydrocarbon waxes are contained, the effect of component (B) can be supplemented, and the curl retention effect and the light spreading effect without stickiness can be enhanced.

[0036] As the powder component, any powder used as a powder commonly used in cosmetics can be used, and it is not particularly limited by the shape such as spherical, plate-like, needle-like, the particle size such as fine particles, pigment grade, the particle structure such as porous, non-porous, etc., and examples include inorganic powders, brightening powders, organic powders, pigment powders, metal powders, composite powders, etc.

[0037] As the surfactant, any surfactant generally used in cosmetics can be used, and examples include nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, etc. Although not particularly limited, from the point that the effects of the present invention can be significantly exhibited, it is preferable to use an amphoteric surfactant, and among them, it is particularly preferable to use lecithin.

[0038] As the aqueous component, any component soluble in water can be used. In addition to water, for example, plant extracts such as propylene glycol, 1,3-butylene glycol, dipropylene glycol, glycerin, diglycerin, polyglycerin, aloe vera, witch hazel, hamamelis, cucumber, lemon, lavender, rose water, etc. can be mentioned.

[0039] Examples of ultraviolet absorbers include benzophenone-based, PABA-based, cinnamic acid-based, salicylic acid-based, etc. Specifically, 4-tert-butyl-4'-methoxydibenzoylmethane, oxybenzone, 2-ethylhexyl paramethoxycinnamate, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, hexyl diethylaminohydroxybenzoyl benzoate, bis(ethylhexyl)oxyphenol methoxyphenyl triazine, etc. can be mentioned.

[0040] Examples of antioxidants include tocopherol, ascorbic acid, etc. Examples of beauty components include vitamins, anti-inflammatory agents, crude drugs, etc. Examples of preservatives include paraoxybenzoic acid esters, phenoxyethanol, 1,2-pentanediol, etc.

[0041] The cosmetic for keratin fibers of the present invention is not limited to the form such as liquid, gel, cream, solid, etc., and the dosage form such as oily, oil-in-water type, water-in-oil type, etc. However, oily and oil-in-water type with oil as the continuous phase are preferable because the effects of the present invention can be obtained particularly significantly, and the water content is preferably 30% or less, more preferably 20% or less, still more preferably 10% or less, even more preferably 1% or less, and may not contain water at all. The viscosity or the hardness when in solid form is not particularly limited as long as there is no problem in usability.

[0042] The cosmetic for keratin fibers of the present invention refers to a cosmetic to be applied to hair, eyelashes, or eyebrows, preferably to be applied to eyelashes or eyebrows. More preferably, it is a cosmetic for eyelashes.

Examples

[0043] Hereinafter, examples and comparative examples of the cosmetic for keratin fibers of the present invention will be shown to specifically explain the present invention, but the present invention is not limited to the following examples.

[0044] Examples 1 to 30 and Comparative Examples 1 to 5: Cosmetics for keratin fibers Cosmetics for oily keratin fibers having the formulations shown in Tables 1 to 3 below were prepared, and the separation effect, persistence of the makeup effect, curl retention effect, light spread without stickiness, and ease of washing off with hot water were evaluated by the following methods. The results are also shown in Tables 1 to 3.

[0045]

Table 1

[0046] *1: Polymer of (meth)acrylic acid alkyl with Tg 30°C (Nissetsu U-3712A (manufactured by Nippon Carbide Industries Co., Ltd.)) *2, *3: Polymer of (meth)acrylic acid alkyl with Tg 30°C *4: Polymer of (meth)acrylic acid alkyl with Tg 15°C *7: WHITE BEESWAX (manufactured by Miki Chemical Industry Co., Ltd., melting point 63°C) *8: TOWAX―1F6 (manufactured by Toagosei Co., Ltd., melting point 83°C) *12: BENTONE 38V BC (manufactured by Elementis) *13: ISODODECANE (manufactured by IMCD) *14: Leopearl KL2 (manufactured by Chiba Flour Milling Co., Ltd.)

[0047]

Table 2

[0048] *9: EMALEX CC-18 (manufactured by Nippon Emulsion Co., Ltd., melting point 55°C) *10: Unister M-2222SL (manufactured by NOF Corporation, melting point 70°C) *15: Leopearl TT2 (manufactured by Chiba Flour Milling Co., Ltd.)

[0049]

Table 3

[0050] *5: Calculated Tg of copolymer -9°C *6: BELSIL TMS 803 (manufactured by Asahi Kasei Wacker Silicone Co., Ltd.) *11: LIPWAX A-4 (manufactured by Nippon Natural Products Co., Ltd., melting point 93°C)

[0051] (Production Method) A. Components (1) to (13), (15), and (16) are uniformly heated and melted at 110°C. B. To A, add component (14) and components (17) to (20) pre-dispersed, and mix uniformly. C. Fill B into a container with an applicator to obtain a cosmetic for keratin fibers.

[0052] (Evaluation Method) The following evaluation items were evaluated by the following methods respectively. (Evaluation Items): (Evaluation Perspectives) i. Persistence of Cosmetic Effect: After 6 hours of normal life after application, check if the cosmetic has not come off due to sweat, etc. ii. Separation Effect: Even after 3 layers of application, check if the eyelashes are not bundled and are separated one by one. iii. Ease of Removal with Hot Water: After 6 hours of application, remove the cosmetic with hot water (40°C) and check if there is color transfer around the eyes and if it can be removed without applying force. iv. Curl Persistence Effect: After 6 hours of application, check if the curl immediately after application is maintained. v. Light Spreading without Stickiness: It is the usability without stickiness during application, and check if there is a spreading feeling where the eyelashes get entangled one by one even when applying multiple layers.

[0053] Regarding items i to v, a usage test was conducted on each sample by 20 professional panel evaluators. All evaluators applied each sample to their eyelashes, and each evaluator evaluated items i to v according to the following absolute evaluation criteria on a 7-point scale from the evaluation perspectives, gave scores, calculated the average value from the total scores of all panel members, and made a determination according to the following determination criteria.

[0054] (Absolute Evaluation Criteria) (Score): (Evaluation) 6: Very Good 5: Good 4: Fairly good 3: Average 2: Fairly bad 1: Bad 0: Very bad

[0055] (Judgment criteria) (Judgment): (Average score) ◎: Exceeding 5 points ○: Exceeding 3.5 points and not exceeding 5 points △: Exceeding 2 points and not exceeding 3.5 points ×: 2 points or less

[0056] As is clear from the results in Tables 1 to 3, the cosmetics for keratin fibers of Examples 1 to 30 of the present invention were superior to the cosmetics for keratin fibers of Comparative Examples 1 to 5 in terms of separation effect, persistence of makeup effect, curl persistence effect, light spread without stickiness, and ease of washing off with hot water. In Comparative Example 1 where Component (A) was not formulated and Component (B) was increased in amount, the persistence of the makeup effect and the curl persistence effect were good, but the makeup film was non-uniform, and satisfactory results were not obtained with regard to the light spreading without separation effect or stickiness, and it was also not easily removed with hot water. In Comparative Example 2 where an aqueous emulsion of an alkyl acrylate / vinyl acetate copolymer was used instead of Component (A), satisfactory results were obtained with regard to ease of removal with hot water, but satisfactory results were not obtained in terms of the persistence of the makeup effect, the separation effect, the curl persistence effect, and the light spreading without stickiness. Further, in Comparative Example 3 where trimethylsiloxysilicic acid was used instead of Component (A), it was excellent in terms of the makeup persistence effect, but satisfactory results were not obtained with regard to the separation effect, the curl persistence effect, and the light spreading without stickiness, and it was also difficult to remove with hot water. Also, in Comparative Example 4 where polyethylene wax was used instead of Component (B), although it was excellent in terms of the persistence of the makeup effect and the curl maintaining effect, satisfactory results were not obtained in terms of the separation effect, the light spreading without stickiness, and ease of removal with hot water. In Comparative Example 5 where Component (C) was not formulated, although the ease of removal with hot water was good, the viscosity was insufficient, so the persistence of the makeup effect, the separation effect, the curl persistence effect, and the light spreading without stickiness were insufficient.

[0057] Example 31: Oil-based Liquid Mascara (Type with Fibers) (Component) (%) (1) Light Liquid Isoparaffin *16 Balance (2) Polymethylsilsesquioxane *17 10 (3) Alkyl Acrylate / Vinyl Acetate Copolymer *1 7 (4) Candelilla Wax (Melting Point 72°C) *18 3 (5) Beeswax (Melting Point 63°C) *19 4 (6) Carnau Wax (Melting Point 83°C) *20 1 (7) (Ethylene / Propylene) Copolymer (Melting Point 95°C) 1 (8) Glyceryl Hydrogenated Abietic Acid *21 1 (9) Dextrin palmitate *22 4 (10) Polypropylene fiber (5T, 2mm) 0.5 (11) Phospholipid-treated rayon fiber (5T, 1mm) 1 (12) Nylon 66 fiber (17T, 2mm) 1 (13) PET fiber (6.3T, 2mm) 1 (14) Dimethicone-treated cellulose fiber (6T, 2mm) 1 (15) Iron black oxide 8 (16) Propylene carbonate 1 (17) Dimethyldistearylammonium hectorite *12 4 (18) Silica (average particle size 16nm) 1 (19) N-Lauroyl-L-lysine 3 (20) Talc 3 (21) Ethylhexylglycerin 0.2 (22) Chlorphenesin 0.1 (23) Lemon fruit extract 0.1 (24) Tocopherol 0.1 (25) Apricot kernel oil 0.1 (26) Olive fruit oil 0.1 (27) Squalane 0.5 (28) DPG 0.5 (29) PEG-1500 0.5 (30) Triethylhexanoin 0.2 (31) Sunflower seed oil 0.1 (32) Sesame seed oil 0.1 *16: IP Solvent 1620MU (manufactured by Idemitsu Kosan Co., Ltd.) *17: SILFORM FLEXIBLE RESIN (manufactured by Momentive) *18: Refined candelilla wax SR-3 (manufactured by Nippon Natural Products Co., Ltd.) *19: SUPER REFINED BEESWAX (manufactured by Croda Japan) *20: Carnauba wax (manufactured by Marchard Chemical) *21: Pink Crystal KE-311 (manufactured by Arakawa Chemical Industries, Ltd.) *22: Leopearl TL2 (manufactured by Chiba Flour Mills)

[0058] (Manufacturing method) A. Dissolve ingredients (1) to (9) at 100°C and disperse them uniformly. Add components (10) to (32) and mix uniformly. The CB is filled into a container with a brush to produce the product.

[0059] The oil-based liquid mascara (fiber-containing type) of Example 31 of the present invention had excellent separating effect, long-lasting cosmetic effect, and curl-lasting effect, spread lightly without stickiness, and was easy to remove with hot water.

[0060] Example 32: Water-in-oil mascara (cream type) (Component) (%) (1) Isododecane*13 remaining (2) Alkyl acrylate / vinyl acetate copolymer*1 10 (3) Trimethylsiloxysilicate*6 7 (4) Trifluoropropyl dimethyl trimethylsiloxysilicate *23 3 (5) Rice bran wax (melting point 79°C) *24 3 (6) Beeswax (melting point 63℃)*19 4 (7) Carnauba wax (melting point 83°C) *18 4 (8) Microcrystalline wax (melting point 90°C) *25 2 (9) Hydrogenated lecithin 0.3 (10) Dextrin isostearate*26 0.5 (11) Dextrin myristate *27 2 (12) PEG-30 dipolyhydroxystearate 2 (13) Dimethiconol (100,000 mPa s) 3 (14) Peach kernel oil 0.5 (15) Corn oil 0.1 (16) Almond oil 0.2 (17) BHT 0.1 (18) Aluminum chloride 0.2 (19) Paraffin 1 (20) Rosa canina fruit oil 0.1 (21) Quaternium-18 Hectorite 4 (22) Fumed silica 1 (23) Black iron oxide 5 (24) N-Lauroyl-L-lysine 0.5 (25) Spherical silicone powder 0.5 (26) Mica 2 (27) Boron nitride 1 (28) Spherical cellulose (average particle size 5 μm) 2 (29) Purified water 10 (30) Ethanol 5 (31) Acrylates copolymer 5 (32) Butylene glycol 1 (33) Caprylyl glycol 0.2 *23: XS66-B8226 (Momentive, 50% solids cyclomethicone solution) *24: Rice Wax SS-I (manufactured by BOSO Oils and Fat Co., Ltd.) *25: GS Wax S-45 (manufactured by Nippon Seiro Co., Ltd.) *26: Unifilma HVY (manufactured by Chiba Flour Mills) *27: Leopearl MKL2 (manufactured by Chiba Flour Mills)

[0061] (Manufacturing method) A. Heat ingredients (1) to (28) to 100°C and mix uniformly. B. Mix ingredients (29) to (33) uniformly. Add B to CA, emulsify, and cool to room temperature. The DC is filled into containers to produce the product.

[0062] The water-in-oil mascara (cream type) of Example 32 of the present invention had excellent separating effect, long-lasting cosmetic effect, and curl-lasting effect, spread lightly without stickiness, and was easy to remove with hot water.

[0063] Example 33: Oil-based eyebrow cosmetic (solid form) (Ingredient) (%) (1) Beeswax (melting point 63°C) *74 (2) Sunflower seed wax (melting point 76°C) *28.6 (3) Carnauba wax (melting point 83°C) *18.3 (4) Alkyl acrylate / vinyl acetate copolymer *1.8 (5) Isododecane balance (6) Dextrin palmitate *14 1.5 (7) 2-Decyltetradecanol 5 (8) Phenyl glycol 1 (9) EDTA-2Na 0.01 (10) Mineral oil 0.5 (11) Di(phytosteryl / octyldodecyl) lauroyl glutamate 0.4 (12) Dimer dilinoleyl hydrogenated rosin condensate 0.3 (13) Hexa(hydroxystearic acid / stearic acid / rosin acid) Dipentaerythrityl 0.5 (14) Distearyldimonium hectorite *12 4 (15) Methyl methacrylate crosspolymer 2 (16) Carbon black 1 (17) 2% Silicone-treated red iron oxide 2 (18) 2% Silicone-treated yellow iron oxide 2 (19) Sericite 15 (20) Silylated anhydrous silicic acid 1 (21) Natural vitamin E 0.1 (22) Jojoba seed oil 0.1 (23) Shea butter 0.1 (24) Dimethicone 0.1 (25) Phytosteryl oleate 0.1 (26) Tritridecyl trimellitate 1 (27) (Eicosene / vinyl pyrrolidone) copolymer 0.5 (28) Orange peel oil 0.01 (29) Jojoba seed oil 0.01 (30) Vitamin B3 0.01 (31) Honey 0.01 *28 Refined Sunflower Wax (manufactured by Yokose Oil & Fat Industry Co., Ltd.)

[0064] (Manufacturing method) A. Heat and dissolve components (1) to (6) at 110°C. B. Add components (7) to (31) to A and mix uniformly. C. Melt and fill B into a container to obtain the product.

[0065] The oil-based eyebrow cosmetic (solid form) of Example 33 of the present invention was excellent in separation effect, persistence of the makeup effect, and curl persistence effect, had a light spread without stickiness, and was excellent in ease of falling off with hot water.

Claims

1. The following components (A) to (D); (A) (A1) A dispersion of an acrylic acid alkyl / vinyl acetate copolymer with a non-aqueous solvent as the dispersion medium (B) Wax ester (C) Organically modified clay mineral (D) Volatile oil A cosmetic for keratin fibers, containing the above components, wherein the component (A2) acrylic acid alkyl / vinyl acetate copolymer is obtained by copolymerizing an alkyl (meth)acrylate and vinyl acetate in a mass ratio range of 30:70 to 70:

30.

2. The cosmetic for keratin fibers according to Claim 1, wherein the content of the component (A) is 0.4 to 15% by mass in terms of solid content.

3. The cosmetic for keratin fibers according to Claim 1 or 2, wherein the mass ratio of the contents of the components (A2) and (B) is (A2) / (B)=0.02 to 1.

5.

4. The cosmetic for keratin fibers according to any one of Claims 1 to 3, wherein the Tg of the polymer of the alkyl (meth)acrylate constituting the component (A2) acrylic acid alkyl / vinyl acetate copolymer is 20 to 50°C.

5. The cosmetic for keratin fibers according to any one of Claims 1 to 4, wherein the number average molecular weight of the component (A2) acrylic acid alkyl / vinyl acetate copolymer is 50,000 to 500,000.

6. The cosmetic for keratin fibers according to any one of Claims 1 to 5, wherein the component (B) contains a wax ester (B1) having a melting point of 40°C or higher and lower than 70°C and a wax ester (B2) having a melting point of 70 to 90°C.

7. The cosmetic for keratin fibers according to any one of Claims 1 to 6, wherein the component (A1) non-aqueous solvent is a volatile hydrocarbon oil.

8. The following components (A) to (D); (A) (A1) A dispersion of an acrylic acid alkyl / vinyl acetate copolymer with a non-aqueous solvent as the dispersion medium (B) Wax ester (C) Organically modified clay mineral (D) Volatile oil A cosmetic for keratin fibers, containing the above components, wherein the component (B) contains a wax ester (B1) having a melting point of 40°C or higher and lower than 70°C and a wax ester (B2) having a melting point of 70 to 90°C.

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