JP7739263B2 - Eyeliner cosmetics - Google Patents

Description

The present invention relates to an eyeliner cosmetic.

Eyeliner cosmetics are cosmetics that emphasize the eyes and make them appear larger by drawing a line around the eye. Because they are used to draw the eye line, they must be easy to apply, allowing for a smooth line without smudging, have film-forming properties that dry instantly to form a film, are durable enough to withstand smudging caused by tears or sebum, and provide a flexible cosmetic film that does not crack with continuous eyelid movement. Furthermore, because the eye line is a very delicate area, it is also important that the cosmetic film can be easily removed without rubbing too hard (ease of removal).

Eyeliner cosmetics are available in oil-based and water-based types. Here, oil-based refers to non-aqueous or water-in-oil eyeliner cosmetics, while water-in-oil refers to eyeliners composed solely of oil-in-water or water-soluble ingredients. Generally, oil-based types have the advantage of excellent makeup wear, while water-based types have the advantage of being easy to remove with warm water. Technologies have been developed to further improve the quality of both oil-based and water-based eyeliners while leveraging their respective advantages. For example, one technology uses a makeup cosmetic containing a non-aqueous polymer dispersion in which a polymer is dispersed in volatile silicone, providing a makeup-wearing effect that prevents makeup from smearing due to sweat, tears, sebum, etc. (see Patent Document 1). Another technology uses a makeup cosmetic containing a core-shell polymer emulsion, a water-containing oil-to-microcrystalline wax in a mass ratio of 1:1 to 1:5, and polyoxyethylene sorbitan beeswax, allowing the makeup to be washed off with warm water despite being waterproof (see Patent Document 2). Furthermore, a formulation has been developed that provides excellent makeup staying power by including an eye cosmetic composition that contains 10.01 to 30% by mass of a silicone film-based coating agent and 25 to 70% by mass of a volatile oil relative to the total amount of the eye cosmetic composition, with the volatile silicone oil content being 25% by mass or more relative to the total amount of volatile oils, and with a hardness of 30 or more and 100 or less (see Patent Document 3).

Japanese Patent Application Publication No. 10-087435 Japanese Patent Application Laid-Open No. 2010-265225 Japanese Patent Application Laid-Open No. 2017-218413

The objective of the present invention is to develop an eyeliner cosmetic that has excellent makeup durability, is easy to remove with hot water, and also has excellent film flexibility, film-forming properties, and does not smudge when applied.

After extensive research, the inventors have developed an eyeliner cosmetic that combines an alkyl acrylate/vinyl acetate copolymer dispersion with a dextrin fatty acid ester, a hydrophobic surface-treated powder, and a volatile oil, which has excellent makeup staying power while being easy to remove with warm water, and which also has excellent film flexibility, film-forming properties, and the ability to prevent smudging when applied.

That is, the present invention provides a composition comprising the following components (A) to (D):
The present invention relates to an eyeliner cosmetic containing (A) (A-1) a non-aqueous solvent as a dispersion medium, (A-2) an alkyl acrylate/vinyl acetate copolymer dispersion, (B) a dextrin fatty acid ester, (C) a hydrophobic surface-treated powder, and (D) a volatile oil.

The present invention makes it possible to provide an eyeliner cosmetic that has excellent makeup retention while being easy to remove with warm water, and that also has excellent film flexibility, film-forming properties, and the ability to prevent smearing when applied.

The details of the present invention are explained below. In this specification, "to" means a range including the numerical values before and after it, and "%" means mass % unless otherwise specified. Furthermore, the "average particle size" in this specification refers to the median diameter D50 value determined by measurement using an image analyzer (Luzex AP, manufactured by Nireco Corporation). In the case of asymmetric shapes, the median diameter D50 determined from the distribution of the largest particle diameter is used as the average particle size in this specification.

Component (A) used in the present invention is a dispersion in which alkyl acrylate/vinyl acetate copolymer (A-2) is dispersed in non-aqueous solvent (A-1).

Alkyl acrylate/vinyl acetate copolymer (A-2) corresponds to the component listed under the INCI (International Nomenclature Cosmetic Ingredient Labeling Names) as ACRYLATES/VA COPOLYMER. Component (A) is obtained by copolymerizing alkyl (meth)acrylate and vinyl acetate, and the alkyl (meth)acrylate is one or more alkyl (meth)acrylates having an alkyl group containing 1 to 4, 8, or 12 carbon atoms. The mass ratio of alkyl (meth)acrylate to vinyl acetate constituting component (A) is not particularly limited, but is preferably 30:70 to 95:5 (alkyl (meth)acrylate:vinyl acetate), and more preferably 40:60 to 70:30. This range is more preferable because it provides excellent makeup durability, ease of removal with hot water, film flexibility, film-forming properties, and no smearing when using a brush-type application tool.

The number average molecular weight of component (A-2) is not particularly limited, but from the viewpoint of cosmetic durability, 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 measured by gel permeation chromatography. Furthermore, from the viewpoint of ease of removal with hot water, the Tg of a polymer obtained by polymerizing only alkyl (meth)acrylate, among the monomers constituting component (A), is preferably 10°C or higher as a lower limit, more preferably 15°C or higher, and even more preferably 20°C or higher. Furthermore, the upper limit is preferably 50°C or lower, and more preferably 40°C or lower.

The non-aqueous solvent (A-1), which serves as the dispersion medium for component (A), includes organic solvents and silicone-based solvents that can be incorporated into cosmetics. Among these, volatile hydrocarbon oils, fatty acid esters, fatty acids, silicone oils, etc. are preferred in terms of film-forming properties and the lack of smearing when using a brush-type applicator, with volatile hydrocarbon oils being more preferred. Volatile hydrocarbon oils are hydrocarbons with a boiling point of 260°C or less at normal pressure. Examples include hydrocarbons with side chains such as isooctane, isododecane, isohexadecane, and isoeicosaene; isoparaffin; and mixtures thereof; and products obtained by polymerizing or copolymerizing isobutene, n-butene, etc. (with a degree of polymerization of 4 to 6 being preferred) and then hydrogenating the polymer. One or more of these can be used in combination as needed. Of these, isododecane is preferred.

There are no particular restrictions on the fatty acid ester, but from the perspective of preventing smearing when using a brush-type applicator, it is preferable for the alkyl group of the constituent fatty acid to be 2 to 18, more preferably 4 to 16, and particularly preferably 8 to 12. Suitable fatty acid esters include, for example, neopentyl glycol di-2-ethylhexanoate, diethylhexyl succinate, ethylhexyl palmitate, isopropyl myristate, dimer dilinoleyl hydrogenated rosin condensate, tri(caprylic/capric)glyceryl, cetyl 2-ethylhexanoate, neopentyl glycol dicaprate, propylene glycol dicaprate, isotridecyl isononanoate, glyceryl tri-2-ethylhexanoate, diisostearyl malate, 2-ethylhexyl paramethoxycinnamate, ethylhexyl salicylate, pentaerythritol tetra-2-ethylhexanoate, polyglyceryl-10 decaethylhexanoate, ethylhexyl hydroxystearate, tritridecyl trimellitate, dipentaerythrityl hexaisononanoate, and diglyceryl triisostearate, and one or more of these may be used. Of these, neopentyl glycol di-2-ethylhexanoate, diethylhexyl succinate, ethylhexyl palmitate, isopropyl myristate, dimer dilinoleyl hydrogenated rosin condensate, tri(caprylic/capric acid)glyceryl, cetyl 2-ethylhexanoate, neopentyl glycol dicaprate, propylene glycol dicaprate, isotridecyl isononanoate, glyceryl tri-2-ethylhexanoate, diisostearyl malate, 2-ethylhexyl paramethoxycinnamate, and ethylhexyl salicylate are more preferred.

Examples of fatty acids include isostearic acid, stearic acid, oleic acid, lauric acid, and palmitic acid. Examples of silicone oils include volatile silicone oils such as diphenylsiloxyphenyl trimethicone, diphenyldimethicone, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane, methyltrimethicone, caprylyl trimethicone, dimethylpolysiloxane, decamethylcyclopentasiloxane, and decamethyltetrasiloxane.

In component (A), the alkyl acrylate/vinyl acetate copolymer (A-2) is dispersed in the non-aqueous solvent (A-1) as resin particles. The average particle size is preferably 0.1 to 2 μm from the viewpoints of makeup durability, ease of removal with hot water, film flexibility, and lack of smearing when using a brush-type application tool. The average particle size of the resin particles is determined using the laser diffraction method as follows: 5 mL of component (A) is placed in a glass cell measuring 5 mm in length, 65 mm in width, and 80 mm in height using a Pasteur pipette, and the cell is placed in a laser diffraction/scattering particle size distribution analyzer (LA-910A, manufactured by Horiba, Ltd.). The concentration of component (A) is adjusted so that the laser light (red) transmittance is 80% to 90%, and the results are measured at a temperature of 25°C ± 1°C. The average particle size of the resin particles in the non-aqueous dispersion is determined by computer processing, and the volume average (D50) value is defined as the average particle size.

Component (A) can be obtained by known methods, such as by polymerizing alkyl (meth)acrylate and vinyl acetate in a non-aqueous solvent, or by dispersing a prepared alkyl acrylate/vinyl acetate copolymer in a non-aqueous solvent. From the standpoint of film-forming properties and the lack of blurring when using a brush-type applicator, the mass ratio ((A-2)/(A-1)) of the non-aqueous solvent (A-1) to the alkyl acrylate/vinyl acetate copolymer (A-2) in component (A) is preferably 1 or less. Examples of commercially available products of component (A) include Nissetsu U-3712A (manufactured by Nippon Carbide Industries Co., Ltd.), and the number average molecular weight and average particle size of the alkyl acrylate/vinyl acetate copolymer (A-2) contained therein fall within the above-mentioned ranges.

The content of component (A-2) in the eyeliner cosmetic of the present invention is not particularly limited, but the lower limit is preferably 0.8% or more, more preferably 1% or more, even more preferably 2% or more, and particularly preferably 3% or more. The upper limit is preferably 20% or less, more preferably 15% or less, even more preferably 10% or less, particularly preferably 8% or less, and most preferably 6% or less. This range is more preferable because it provides superior makeup durability, ease of removal with hot water, film flexibility, and film-forming properties.

Component (B) in the present invention is an ester of a fatty acid and dextrin. Any dextrin fatty acid ester typically suitable for use in cosmetics can be used in the present invention. For example, the fatty acid used in the dextrin fatty acid ester of the present invention is not particularly limited. However, from the viewpoints of film-forming ability and film flexibility, the lower limit of the number of carbon atoms in the fatty acid is preferably 12 or more, more preferably 14 or more, and even more preferably 16 or more. The upper limit is preferably 22 or less, more preferably 20 or less, and even more preferably 18 or less. Specific examples of such fatty acids include ethylhexanoic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, and behenic acid. Furthermore, while any fatty acid, whether linear or branched, can be used in the dextrin fatty acid ester, linear fatty acids are preferred from the viewpoint of film-forming ability. While saturated or unsaturated fatty acids can be used, saturated fatty acids are preferred from the viewpoint of film-forming ability. Furthermore, the degree of substitution of fatty acids for hydroxyl groups of dextrin is not particularly limited, but the lower limit is preferably 1 or more, more preferably 1.7 or more, and the upper limit is preferably 3 or less, more preferably 2.5 or less.

Examples of such component (B) include dextrin laurate, dextrin myristate, dextrin palmitate, dextrin (palmitate/ethylhexanoate), dextrin stearate, dextrin isostearate, dextrin behenate, and coconut oil fatty acid dextrin. Among these, one or more selected from the group consisting of dextrin myristate, dextrin palmitate, dextrin (palmitate/ethylhexanoate), dextrin stearate, and dextrin isostearate are preferred, one or more selected from the group consisting of dextrin myristate, dextrin palmitate, and dextrin (palmitate/ethylhexanoate) are more preferred, and dextrin palmitate is even more preferred.

The combination of components (A) and (B) of the present invention, along with other components (C) and (D), improves ease of removal with hot water, film flexibility, and film-forming properties. Like component (A), component (B) has a hydrophilic and hydrophobic portion, and is thought to act as a film-forming aid in the process of component (A) fusing together, thereby improving film-forming properties. The interaction between components (A) and (B) is also thought to form a flexible film, which can be easily removed as a film when removed with hot water.

Commercially available dextrin fatty acid esters used in component (B) include "Leopearl KL2," "Leopearl ISL," "Leopearl TT," and "Leopearl TL2" (all manufactured by Chiba Flour Mills Co., Ltd.).

The content of component (B) in the present invention is not particularly limited, but the lower limit is preferably 1% or more, more preferably 2% or more, even more preferably 4% or more, and particularly preferably 6% or more. The upper limit is preferably 20% or less, more preferably 15% or less, even more preferably 14% or less, and particularly preferably 12% or less. This range is more preferable because it provides superior makeup durability, film flexibility, film-forming properties, and the absence of smearing when using a brush-type applicator.

In the present invention, the mass ratio of the components (A-2) and (B) is not particularly limited, but specifying the mass ratio is preferred because greater effects can be expected. The lower limit of the mass ratio (A-2)/(B) of the components (A-2) and (B) is preferably 0.08 or more, more preferably 0.1 or more, even more preferably 0.2 or more, and even more preferably 0.3 or more. The upper limit is preferably 2.5 or less, more preferably 2 or less, even more preferably 1.5 or less, particularly preferably 1 or less, and most preferably 0.5 or less. This range is more preferred because it provides superior makeup durability, ease of removal with hot water, film flexibility, film-forming properties, and lack of smearing when using a brush-type applicator.

Component (C) of the present invention is a hydrophobic surface-treated powder in which part or all of the powder surface has been coated with a hydrophobic surface treatment agent to impart hydrophobic properties to the powder. The hydrophobic surface-treated powder of the present invention can be any powder typically used in cosmetics, without any particular restrictions. Treating the powder weakens the adhesiveness of the powder surface and reduces aggregation between powder particles. Therefore, when combined with component (B), a more uniform cosmetic film is formed, resulting in effects such as longer cosmetic wear.

Examples of surface treatment agents used in component (C) of the present invention include fluorine compounds, silane compounds, organic titanates, silicone compounds, oils, gelling agents, emulsion polymers, etc. In the present invention, one or more of these may be used in combination. Of these, one or more selected from the group consisting of fluorine compounds, silane compounds, and silicone compounds are preferred in terms of excellent cosmetic durability, etc., with fluorine compounds or silane compounds being more preferred, and fluorine compounds being particularly preferred in terms of excellent cosmetic durability and film flexibility.

In the surface treatment agent of the present invention, examples of fluorine compounds include perfluoroalkyl phosphate ester diethanolamine salts, perfluorooctyltriethoxysilane, and perfluoropolyether. Of these, it is more preferable to use perfluorooctyltriethoxysilane.

Examples of silane compounds include silane coupling agents, specifically trialkoxyalkylsilanes. Trialkoxyalkylsilanes are compounds in which three alkoxy groups and one alkyl group are bonded to a silicon atom. The alkoxy groups react with hydroxyl groups and other groups on the powder surface, chemically modifying the powder surface. The alkoxy group in the trialkoxyalkylsilane is preferably an alkoxy group having 1 to 3 carbon atoms, such as methoxy, ethoxy, or propoxy. The alkyl group in the trialkoxyalkylsilane is preferably an alkyl group having 6 to 18 carbon atoms, such as hexyl, octyl, decyl, or octadecyl. Examples of such trialkoxyalkylsilanes include trimethoxyhexylsilane, trimethoxyoctylsilane, trimethoxydecylsilane, trimethoxyoctadecylsilane, triethoxyhexylsilane, triethoxyoctylsilane, triethoxydecylsilane, and triethoxyoctadecylsilane. Among these trialkoxyalkylsilanes, trimethoxyoctylsilane and triethoxyoctylsilane are preferred.

The amount of hydrophobic surface treatment agent in the hydrophobic surface-treated powder (component (C)) of the present invention is not particularly limited, but the lower limit is preferably 0.1% or more, more preferably 0.5% or more, and even more preferably 1% or more. The upper limit is preferably 10% or less, more preferably 5% or less, and even more preferably 3% or less. This range is more preferable because it provides excellent makeup staying power, is easy to remove with hot water, and does not smear when applied.

The powder used as component (C) in the present invention may be any powder commonly used in cosmetics, and is not particularly limited by its shape (e.g., spherical, plate-like, acicular, etc.), its average particle size (e.g., fine particles or pigment-grade), or its particle structure (e.g., porous or non-porous), etc. Examples include inorganic powders, glitter powders, pigment powders, metal powders, composite powders, etc. Specifically, white inorganic pigments such as titanium oxide, zinc oxide, cerium oxide, and barium sulfate; colored inorganic pigments such as iron oxide, carbon black, titanium and titanium oxide sintered product, chromium oxide, chromium hydroxide, iron blue, and ultramarine; white filler powders such as silica, talc, muscovite, phlogopite, lepidolite, biotite, synthetic mica, sericite, synthetic sericite, kaolin, silicon carbide, bentonite, smectite, aluminum oxide, magnesium oxide, zirconium oxide, antimony oxide, diatomaceous earth, aluminum silicate, magnesium aluminum metasilicate, calcium silicate, barium silicate, magnesium silicate, calcium carbonate, magnesium carbonate, hydroxyapatite, and boron nitride; titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, iron oxide titanium mica, iron blue-treated mica titanium, carmine-treated mica titanium, bismuth oxychloride, fish scale foil, polyethylene terephthalate-aluminum-epoxy Examples of suitable pigments include glitter powders such as zinc stearate, aluminum stearate, magnesium stearate, zinc laurate, aluminum laurate, and magnesium laurate; organic pigment powders such as zirconium, barium, or aluminum lakes, such as Red No. 201, Red No. 202, Red No. 205, Red No. 226, Red No. 228, Orange No. 203, Orange No. 204, Blue No. 404, Yellow No. 401, Red No. 3, Red No. 104, Red No. 106, Orange No. 205, Yellow No. 4, Yellow No. 5, Green No. 3, and Blue No. 1; and metal powders such as aluminum powder, gold powder, and silver powder. Examples of suitable pigments include titanium dioxide-coated mica titanium fine particle, zinc oxide-coated mica titanium fine particle, barium sulfate-coated mica titanium fine particle, titanium oxide-containing silicon dioxide, and zinc oxide-containing silicon dioxide.

The content of component (C) in the present invention is not particularly limited, but the lower limit is preferably 1% or more, more preferably 5% or more, and even more preferably 10% or more. The upper limit is preferably 50% or less, more preferably 30% or less, and even more preferably 20% or less. This range is more preferable because it provides superior makeup durability, film flexibility, and the absence of smearing when using a brush-type applicator.

In the present invention, the mass ratio of the components (B) and (C) is not particularly limited, but specifying the mass ratio is preferred because greater effects can be expected. The lower limit of the mass ratio (B)/(C) of the components (B) and (C) is preferably 0.1 or more, more preferably 0.2 or more, and even more preferably 0.3 or more. The upper limit is preferably 2 or less, more preferably 1.5 or less, even more preferably 1 or less, and particularly preferably 0.7 or less. This range is more preferred because it provides superior cosmetic durability, film flexibility, film-forming properties, and the absence of smearing when using a brush-type applicator.

Component (D) of the present invention is a volatile oil that is volatile at 25°C. Component (D) of the present invention is not particularly limited, but the same components as the non-aqueous solvent (A-1) of component (A) above can be suitably used. Any oil typically used in cosmetics can be used without particular limitations. Specific examples include volatile hydrocarbon oils and volatile silicone oils. More specific examples include isododecane, light liquid isoparaffin, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane, methyl trimethicone, caprylyl trimethicone, dimethylpolysiloxane, decamethylcyclopentasiloxane, and decamethyltetrasiloxane. One or more of these may be contained. Among these, from the standpoints of film-forming properties and the lack of smearing when using a brush-type applicator, volatile hydrocarbon oils are preferred, isododecane or light liquid isoparaffin are more preferred, and isododecane is even more preferred.

The content of component (D) in the present invention is not particularly limited, but the lower limit is preferably 20% or more, more preferably 30% or more, and even more preferably 40% or more. The upper limit is preferably 80% or less, more preferably 70% or less, and even more preferably 60% or less. This range is more preferable because it provides better film-forming properties.

When component (A-1) used in the present invention is a volatile oil, the total content of volatile oil (A-1) and component (D), [(A-1) + (D)], is not particularly limited, but the lower limit is preferably 20% or more, more preferably 30% or more, and even more preferably 40% or more. The upper limit is preferably 80% or less, more preferably 75% or less, and even more preferably 70% or less. This range is more preferable as it provides better film-forming properties.

The present invention may further contain component (E), a nonionic surfactant. The inclusion of component (E) in the present invention is more preferable because it enhances the dispersibility of component (C) in the eyeliner cosmetic, providing excellent makeup staying power while also making the cosmetic easier to remove with hot water.

Component (E) in the present invention is not particularly limited, but the lower limit of the HLB is preferably 1 or higher, more preferably 2 or higher, and even more preferably 3 or higher. The upper limit is preferably 18 or lower, more preferably 8 or lower, and even more preferably 5 or lower. The HLB (hydrophile-lipophile balance) value used in the present invention is the value obtained by the Griffin method.

By specifying the HLB, component (E) of the present invention achieves excellent makeup durability while also being easily removable with hot water. Furthermore, by specifying the structure, it is also preferable for it to have excellent smoothness. For example, an ester of a fatty acid and an alcohol is preferable. The fatty acid used in such an ester preferably has a lower carbon number of 12 or more, more preferably 14 or more, and even more preferably 16 or more. The upper carbon number is preferably 22 or less, more preferably 20 or less, and even more preferably 18 or less. Furthermore, it is preferable for the carbon chain of the fatty acid to be branched. The alcohol is preferably a polyhydric alcohol, more specifically, dihydric or higher alcohols, glycols, sugars, sugar alcohols, etc. Among these, one or more selected from the group consisting of glycols, sugars, and sugar alcohols are preferable, with sugars or sugar alcohols being more preferable. Examples of such sugars or sugar alcohols include glucose, sucrose, maltose, sorbitol, etc., and one or more selected from these are preferable, with sucrose or sorbitol being more preferable, and sorbitol being particularly preferable.

In the present invention, examples of component (E) include polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene cholesteryl ethers, polyoxyethylene cholestanol ethers, polyoxyethylene phytosterol ethers, polyethylene glycol fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, sorbitan fatty acid esters, sorbitan sesquioleate, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, ethylene oxide derivatives of propylene glycol fatty acid esters, ethylene oxide derivatives of polyglycerin fatty acid esters, sucrose fatty acid esters, alkyl polyglucosides, polyoxyethylene fatty acid alkanolamides, fatty acid alkanolamides, polyoxyalkylene-modified organopolysiloxanes, and alkyl-containing polyoxyalkylene-modified organopolysiloxanes. Among these, one or more selected from the group consisting of sorbitan fatty acid esters and sucrose fatty acid esters are preferred.Specific examples include sorbitan monoisostearate, sorbitan sesquiisostearate, sorbitan monopalmitate, sorbitan oleate, sorbitan sesquioleate, sorbitan tristearate, sucrose stearate, sucrose tetraisostearate, sucrose pentahydroxystearate, and sucrose polystearate.Of these, sorbitan sesquiisostearate (HLB4), sorbitan monopalmitate (HLB6.7), sorbitan sesquioleate (HLB4), and sucrose polystearate (HLB1) are preferred, and sorbitan sesquiisostearate, sorbitan sesquioleate, and sucrose polystearate are more preferred.

The content of component (E) in the present invention is not particularly limited, but the lower limit is preferably 0.01% or more, more preferably 0.05% or more, and even more preferably 0.1% or more. The upper limit is preferably 5% or less, more preferably 3% or less, and even more preferably 1% or less. This range is more preferable because it provides excellent makeup durability and prevents smearing when using a brush-type applicator.

The present invention may further contain component (F), an organic powder. The organic powder used in the present invention is not particularly limited in terms of shape (e.g., spherical or plate-like), particle size, particle structure (e.g., porous or non-porous), etc., as long as it is an organic powder typically used in cosmetics. In the present invention, a spherical shape is preferred, as it provides superior results in preventing smearing when using a brush-type applicator.

Examples of component (F) include organic powders such as nylon powder, polymethyl methacrylate powder, acrylonitrile-methacrylic acid copolymer powder, vinylidene chloride-methacrylic acid copolymer powder, PET resin powder, polyethylene powder, polystyrene powder, organopolysiloxane elastomer powder, polymethylsilsesquioxane powder, polyurethane powder, wool powder, silk powder, crystalline cellulose, and N-acyl lysine. Among these, one or more selected from the group consisting of organopolysiloxane elastomer powder, polymethylsilsesquioxane powder, polyurethane powder, and crystalline cellulose are preferred, one or more selected from the group consisting of organopolysiloxane elastomer powder, polymethylsilsesquioxane powder, and crystalline cellulose are more preferred, and one or more selected from the group consisting of organopolysiloxane elastomer powder and crystalline cellulose are even more preferred. Examples of commercially available organopolysiloxane elastomer powders include KSP-100, KSP-101, and KSP-102 (all manufactured by Shin-Etsu Chemical Co., Ltd., (vinyl dimethicone/methicone silsesquioxane) crosspolymer).

The average particle size of component (F) is preferably 0.1 μm or more in terms of achieving excellent makeup durability and preventing smearing when using a brush-type application tool, with a lower limit of 0.1 μm or more, more preferably 1 μm or more, even more preferably 3 μm or more, and particularly preferably 7 μm or more. The upper limit is preferably 30 μm or less, more preferably 20 μm or less, and even more preferably 15 μm or less.

The content of component (F) in the present invention is not particularly limited, but the lower limit is preferably 1% or more, more preferably 3% or more, and even more preferably 5% or more. The upper limit is preferably 20% or less, more preferably 17% or less, and even more preferably 15% or less. This range is more preferable because it results in excellent smoothness when applied.

The eyeliner cosmetic of the present invention may further contain water. Tap water may be used, or purified water purified by distillation or other methods, hot spring water, deep sea water, etc. may also be used. Plant extracts such as aloe vera, witch hazel, hamamelis, cucumber, lemon, lavender, and rose water may also be used.

The water content in the present invention is not particularly limited, but the lower limit is preferably 0.0001% or more, more preferably 0.001% or more, and even more preferably 0.01% or more. The upper limit is preferably 30% or less, more preferably 25% or less, and even more preferably 20% or less.

The eyeliner cosmetic of the present invention can be produced by conventional methods.

The eyeliner cosmetic of the present invention is not particularly limited, but can take on properties such as powder, solid, liquid, or gel form. Liquid or gel form is preferred from the viewpoint of preventing smearing when using a brush-shaped applicator. The eyeliner cosmetic of the present invention may be either oil-based or water-based, with oil-based being preferred. Oil-based types include non-aqueous types and W/O types. In this specification, non-aqueous types refer to those with a water content of 5% or less, preferably 3% or less, and more preferably 1% or less. The oil-based eyeliner cosmetic of the present invention, while being oil-based, combines the advantage of water-based types, such as ease of removal with hot water.

The eyeliner cosmetic of the present invention is not particularly limited and can have a variety of viscosities. For example, the lower limit is preferably 250 mPa·s or more at 25°C, more preferably 500 mPa·s or more, and even more preferably 1000 mPa·s or more. The upper limit is preferably 20,000 mPa·s or less at 25°C, more preferably 18,000 mPa·s or less, and even more preferably 15,000 mPa·s or less. In the present invention, the viscosity at 25°C can be measured in accordance with Method 2 of the Viscosity Measurement Methods for Cosmetic Raw Materials using a Brookfield viscometer. For example, the eyeliner cosmetic can be left to stand at 25°C for one day, and then measured using a Brookfield viscometer (manufactured by Eiko Seiki Co., Ltd.) with a rotor No. 4 at 25°C, a measurement time of 6 rpm, and a measurement time of 1 minute.

The present invention will be explained in more detail below with reference to the following examples. However, these examples are not intended to limit the scope of the present invention in any way.

Example 1 (Products 1 to 27 of the Invention) and Comparative Examples (Comparative Products 1 to 6): Eyeliners The eyeliners shown in Tables 1 to 4 were prepared and evaluated and judged using the following evaluation methods for a. makeup durability, b. ease of removal with hot water, c. film flexibility, d. film-forming properties, and e. absence of smearing upon application. The results are also shown in Tables 1 to 4.

*1: Nissetsu U-3712A (manufactured by Nippon Carbide Industries Co., Ltd., solid content 45%, isododecane solvent)
Alkyl (meth)acrylate (Tg 30°C): vinyl acetate 50:50
*2: The copolymer components are the same as *1 (solid content 45% isododecane solvent)
Alkyl (meth)acrylate (Tg 30°C):vinyl acetate=70:30
*3: The copolymer components are the same as *1 (solid content 45% isododecane solvent)
Alkyl (meth)acrylate (Tg 30°C):vinyl acetate=30:70
*4: Leopard KL2 (manufactured by Chiba Flour Mills): Substitution degree 2
*5: Leopard TL2 (manufactured by Chiba Flour Mills): Substitution degree 1.5
*6: Leopearl MKL2 (manufactured by Chiba Flour Mills): Substitution degree: 2
*7: Leopard TT2 (manufactured by Chiba Flour Mills): Substitution degree 1.5
*8: KF-96L-2CS (Shin-Etsu Chemical Co., Ltd.)
*9: KSP-100 (Shin-Etsu Chemical Co., Ltd.)
*10: KSP-101 (Shin-Etsu Chemical Co., Ltd.)
*11: KSP-102 (Shin-Etsu Chemical Co., Ltd.)
*12: CELLULOBEADS D-10 (manufactured by Daido Kasei Co., Ltd.)

(Manufacturing method)
A. Heat ingredients (1) to (22) and (27) to 80°C and mix uniformly.
B. Process A with a roller.
C. Components (23) to (26) were added to B and mixed, and then the mixture was poured into a container equipped with a brush-type applicator to obtain an eyeliner.

(Evaluation items)
A. Makeup durability C. Flexibility of the film E. No smudging when applied

(Evaluation method)
Twenty expert cosmetic evaluation panelists used Example 1 (products 1 to 27 of the present invention) and Comparative Examples (comparison products 1 to 6), and each panelist evaluated and scored the following four-point scale according to the following evaluation criteria: (a) whether the cosmetic film remained unchanged for 8 hours; (c) whether there was no feeling of burden when blinking (a cosmetic film was judged to have flexibility if it moved flexibly in response to blinking movements and no feeling of burden was felt); and (e) whether the application could be made without smearing when using a brush-type applicator. The average score of the scores of all panels was then judged according to the following evaluation criteria.

(Evaluation criteria)
(Score): (Evaluation)
4: Very good 3: Good 2: Bad 1: Very bad

(Judgment criteria)
(Judgment): (Average score)
◎: 3.5 points or more 〇: 3.0 points or more but less than 3.5 points △: 2.0 points or more but less than 3.0 points ×: Less than 2.0 points

(Evaluation items)
B. Ease of removal with hot water

(Evaluation method)
A panel of 20 experts in cosmetic evaluation used Example 1 (products 1 to 27 of the present invention) and Comparative Examples (comparison products 1 to 6). After evaluating the cosmetic durability, they scrubbed the samples five or more times with hot water at 40°C and evaluated the ease of removal with hot water. The results were judged according to the following criteria.

(Judgment criteria)
(Judgment): (When washed with hot water)
◎: Completely removed after scrubbing five times with 40°C water ○: Completely removed after scrubbing 6-10 times with 40°C water △: Completely removed after scrubbing 11-15 times with 40°C water ×: A makeup film remains after scrubbing 16 or more times with 40°C water

(Evaluation items)
2: Film forming property

(Evaluation method)
0.2 g of each of Example 1 (Products 1 to 27 of the present invention) and Comparative Examples (Comparative Products 1 to 6) was applied to a glass plate in an area of 3 cm x 3 cm and a thickness of 12.5 μm. To confirm that the coating film had dried and formed, the surface of the film was touched with a finger and the time required for the bulk to no longer stick to the finger was evaluated according to the following evaluation criteria.

(Judgment criteria)
(Judgment): (Time it takes for the coating to dry)
◎: The coating film dries in less than 1 minute 30 seconds after application. ○: The coating film dries in 1 minute 30 seconds or more but less than 2 minutes 30 seconds after application. △: The coating film dries in 2 minutes 30 seconds or more but less than 3 minutes 30 seconds after application. ×: The coating film dries in 3 minutes 30 seconds or more after application.

As is clear from the results in Tables 1 to 4, the eyeliners of Example 1 (Products 1 to 27 of the Invention) were superior to the comparative examples in all aspects, including makeup retention, ease of removal with hot water, film flexibility, film-forming ability, and lack of smearing when applied. On the other hand, Comparative Products 1 and 2, in which component (A) was replaced with other polymers or resins, lacked ease of removal with hot water, film flexibility, and film-forming ability. Furthermore, Comparative Products 3, 4, and 5, in which component (B) was replaced with other thickeners and adjusted to a viscosity similar to that of Inventive Product 3 (15,000 mPa·s at 25°C), lacked makeup retention, film flexibility, film-forming ability, and lack of smearing when using a brush-type applicator. Comparative Product 6, which used powder without a surface treatment, lacked makeup retention, film flexibility, and film-forming ability.

Example 2 Eyeliner Liquid (Component) (%)
1. (Alkyl acrylate/vinyl acetate) copolymer *1 10
2. Carnauba wax 2
3. Hydrogenated soybean phospholipid 0.5
4. Silica anhydride 0.1
5. Dextrin palmitate *5 10
6. Perfluorooctyltriethoxysilane 3% treated black iron oxide
10
7. Talc 5
8. Isododecane remaining amount 9. Sorbitan sesquiisostearate (HLB: 4.0) 0.3
10. Diisostearyl malate 1
11. Triethylhexanoin 1
12. Hydrogenated polyisobutene 1
13. Methylparaben 0.1
14. Gardenia extract 0.01
15. Rose extract 0.01
16. Fragrance 0.01
17 (Vinyl Dimethicone/Methicone Silsesquioxane)
Crosspolymer average particle size μm 10

(Manufacturing method)
A. Heat ingredients (1) to (15) to 80°C and mix uniformly.
B. Process A with a roller.
C. Components (16) and (17) were added to B and mixed, and then the mixture was filled into a container equipped with a brush-type applicator to obtain an eyeliner.

The liquid eyeliner obtained in this manner had excellent makeup retention, ease of removal with hot water, film flexibility, film-forming properties, and no smudging when used with a brush-type applicator.

Example 3 Eyeliner Gel (Component) (%)
1. (Alkyl acrylate/vinyl acetate) copolymer *1 10
2. Candelilla wax 3
3. Microcrystalline wax 1
4. Dextrin palmitate *4 15
5. Perfluorooctyltriethoxysilane 3% treated black iron oxide
30
6. Mica 5
7. Isododecane remaining amount 8. Sorbitan sesquiisostearate (HLB: 4.0) 0.3
9. Lecithin 0.01
10. Mineral oil 0.01
11. Kaeke extract 0.01
12. Macadamia nut oil 0.01
13. Methylparaben 0.1
14. (Vinyl Dimethicone/Methicone Silsesquioxane)
Crosspolymer Average particle size 12 μm 10

(Manufacturing method)
A. Heat ingredients (1) to (13) to 80°C and mix uniformly.
B. Process A with a roller.
C. Component (14) was added to B and mixed, and then the mixture was filled into a container equipped with a brush-type applicator to obtain an eyeliner.

The gel eyeliner obtained in this manner had excellent makeup retention, ease of removal with hot water, film flexibility, film-forming properties, and no smudging when applied with a brush-type applicator.

Example 4 Eyeliner Solid (Component) (%)
1. Polyethylene wax 10
2. (Alkyl acrylate/vinyl acetate) copolymer *1 10
3. Dextrin palmitate *5 10
4. Perfluorooctyltriethoxysilane 3% treated black iron oxide
10
5. Isododecane remaining amount 6. Sorbitan sesquiisostearate (HLB: 4.0) 0.3
7. Chlorphenesin 0.1
8. Oil-soluble rosemary extract 0.01
9. Almond oil 0.01
10. Refined olive oil 0.01
11. Refined jojoba oil 0.01
12. Safflower oil 0.01
13. Refined Shea Butter 0.01
14. Sesame oil 0.01
15. Squalane 0.01
16. (Vinyl Dimethicone/Methicone Silsesquioxane)
Crosspolymer Average particle size 12 μm 10

A. Dissolve ingredients (1) to (15) uniformly at 100°C.
B. Add ingredient (16) to A and mix evenly.
C. B was melted and poured into a metal dish at 90°C, and then cooled and solidified to obtain a solid eyeliner.

The gold-plated eyeliner obtained in this manner had excellent makeup retention, ease of removal with hot water, film flexibility, film-forming properties, and no smudging when applied with a brush-type applicator.

Example 5 Eyeliner Water-in-oil emulsion cosmetic (ingredients) (%)
1. (Alkyl acrylate/vinyl acetate) copolymer *1 10
2. Dextrin palmitate *4 10
3. Perfluorooctyltriethoxysilane 3% treated black iron oxide
10
4. Isododecane remaining amount 5. Glyceryl monostearate (HLB: 4.0) 0.3
6. Polyethylene glycol dipolyhydroxystearate
(HLB:5.0) 0.1
7. PEG-9 Polydimethylsiloxyethyl Dimethicone
(HLB:4.0) 0.1
8. Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone
(HLB:3.0) 0.1
9. Methylparaben 0.01
11. Phenoxyethanol 0.01
12. Ethanol 0.5
13. Lavender water 0.01
14. Peony flower extract 0.01
15. Damask rose extract 0.01
16. Madonna lily root extract 0.01
17. DPG 0.1
18. EDTA-2Na 0.01
19. (Vinyl Dimethicone/Methicone Silsesquioxane)
Crosspolymer Average particle size 30 μm 10

A. Dissolve ingredients (1) to (8) uniformly at 80°C.
B. Add ingredients (9) to (18) to A and emulsify uniformly.
C. Component (19) was added to B and mixed uniformly, and then the mixture was filled into a container equipped with a brush-type applicator to obtain an eyeliner.

The eyeliner obtained in this manner had excellent makeup retention, ease of removal with hot water, film flexibility, film-forming properties, and no smudging when applied with a brush-type applicator.

Claims (11)

The following components (A) to (E):
(A) An eyeliner cosmetic comprising: (A-1) a non-aqueous solvent as a dispersion medium; (A-2) an alkyl acrylate/vinyl acetate copolymer dispersion; (B) a dextrin fatty acid ester; (C) a hydrophobic surface-treated powder; (D) a volatile oil; and (E) sorbitan sesquiisostearate and/or sorbitan monopalmitate. The eyeliner cosmetic according to claim 1, wherein component (A-2) acrylic alkyl/vinyl acetate copolymer is a copolymer of alkyl (meth)acrylate and vinyl acetate in a mass ratio ranging from 30:70 to 95:5. 3. The eyeliner cosmetic according to claim 1, wherein the Tg of the alkyl (meth)acrylate polymer constituting the alkyl acrylate/vinyl acetate copolymer, component (A-2), is 10° C. or higher and 50° C. or lower. The eyeliner cosmetic according to any one of claims 1 to 3, wherein the number-average molecular weight of component (A-2) alkyl acrylate/vinyl acetate copolymer is 50,000 to 500,000. The eyeliner cosmetic according to any one of claims 1 to 4, wherein the content of component (A-2) is 0.8 to 20% by mass. The eyeliner cosmetic according to any one of claims 1 to 5, wherein component (B) is dextrin palmitate. The eyeliner cosmetic according to any one of claims 1 to 6, wherein component (C) is a powder surface-treated with a fluorine compound. The eyeliner cosmetic according to any one of claims 1 to 7, wherein the mass ratio (A-2)/(B) of the components (A-2) and (B) is 0.08 to 2.5. The eyeliner cosmetic according to any one of claims 1 to 8 further contains component (F) organic powder. The eyeliner cosmetic according to claim 9, wherein component (F) is an organic spherical powder. The eyeliner cosmetic according to claim 9 or 10, wherein the average particle size of component (F) is 5 to 15 μm.