JP7779508B2 - Eyelash cosmetics - Google Patents

Description

The present invention relates to an oily mascara composition and a cosmetic for eyelashes.

To make your eyelashes stand out more, you can use mascara, a cosmetic product for your eyelashes. Mascara comes in colored mascara, such as black, brown, or blue, as well as clear mascara, which adds volume without coloring.

Special Publication No. 2021-509888 Patent No. 6153275 specification

Recently, lipsticks and the like that are called tint types and that change color after application have been developed (Patent Documents 1 and 2). However, there have been no mascara products that offer the enjoyment of changing color after application.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cosmetic for eyelashes that allows the enjoyment of changing colors.

The present inventors have conducted extensive research into eyelash cosmetics that allow the enjoyment of changing colors, and have surprisingly found that by using an oil-based mascara composition containing a water-soluble dye and a hydrophilic polymer, the color of the mascara can be changed after application.
The present invention is based on this finding.
Therefore, the present invention provides
[1] An oil-based mascara composition comprising: (A) 0.0005 to 12% by mass of a water-soluble dye; (B) 0.05 to 25% by mass of a hydrophilic polymer; and (C) an oily component;
[2] The oil-based mascara composition according to [1], further comprising (D) a powder component.
[3] The water-soluble dye is selected from the group consisting of Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1, Blue No. 2, Red No. 213, Red No. 214, Red No. 227, Red No. 230 (1), Red No. 230 (2), Red No. 231, Red No. 232, Orange No. 205, Orange No. 207, Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 203, and Green No. 20 the oil-based mascara composition according to [1] or [2], which is at least one selected from the group consisting of No. 1, Green 204, Green 205, Blue 202, Blue 203, Blue 205, Brown 201, Red 401, Red 503, Red 503, Red 504, Red 506, Orange 402, Yellow 402, Yellow 403 (1), Yellow 406, Yellow 407, Green 401, Green 402, Purple 401, and Black 401;
[4] The oil-based mascara composition according to any one of [1] to [3], wherein the hydrophilic polymer is selected from the group consisting of polyvinyl alcohol, polyvinylpyrrolidone, hydroxypropyl cellulose, hydroxyethyl cellulose, highly polymerized polyethylene glycol, cellulose, gelatin, high-methoxyl pectin, low-methoxyl pectin, tamarind gelatin seed polysaccharide, roasted bean gum, pullulan, gum arabic, xanthan gum, guar gum, gellan gum, cellulose gum, rice starch, tapioca starch, agar, alginic acid, carrageenan, or starch-sodium acrylate graft copolymer.
[5] A cosmetic for eyelashes, comprising the oily mascara composition according to any one of [1] to [4].
[6] A cosmetic for eyelashes, comprising the oily mascara composition according to any one of [1] to [4] as a first liquid, and an aqueous composition containing 20% by mass or more of water as a second liquid.
[7] The eyelash cosmetic according to [6], wherein the aqueous composition is an aqueous mascara, emulsion, serum, cream, or lotion.
[8] A method for applying makeup to eyelashes, comprising a step of topically applying the oily mascara composition according to any one of [1] to [4] to the eyelashes, and a step of topically applying an aqueous composition containing 20% by mass or more of water to the eyelashes; and [9] the method for applying makeup to eyelashes according to [8], wherein the aqueous composition is an aqueous mascara, emulsion, cream, serum, or lotion.
Regarding.

According to the oil-based mascara composition of the present invention, the color of the eyelashes can be changed by applying the oil-based mascara composition and then further applying an aqueous composition.

The photographs show the state of eyelashes to which the first liquid has been applied (1st liquid), and the state of eyelashes to which the second liquid has been applied and which have changed color to red (1st liquid + 2nd liquid). Photographs showing the state in which eyelashes have turned blue (A) or yellow (B) after application of the first and second liquids.

[1] Oil-based mascara composition The oil-based mascara composition of the present invention comprises (A) 0.0005 to 12% by mass of a water-soluble dye, (B) 0.05 to 25% by mass of a hydrophilic polymer, and (C) an oil component.

《Water-soluble dye (A)》
The oil-based mascara composition of the present invention contains 0.0005 to 12% by mass of a water-soluble dye (hereinafter, sometimes referred to as component A). In oil-based mascara, the water-soluble dye basically does not develop color.

The water-soluble dyes are not particularly limited as long as they are water-soluble, but examples include Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1, Blue No. 2, Red No. 213, Red No. 214, Red No. 227, Red No. 230 (1), Red No. 230 (2), Red No. 231, Red No. 232, Orange No. 205, Orange No. 207, and Yellow Examples include No. 202 (1), Yellow No. 202 (2), Yellow No. 203, Green No. 201, Green No. 204, Green No. 205, Blue No. 202, Blue No. 203, Blue No. 205, Brown No. 201, Red No. 401, Red No. 503, Red No. 503, Red No. 504, Red No. 506, Orange No. 402, Yellow No. 402, Yellow No. 403 (1), Yellow No. 406, Yellow No. 407, Green No. 401, Green No. 402, Purple No. 401, and Black No. 401.

The content of the water-soluble dye in the oil-based mascara composition of the present invention is not particularly limited as long as the effects of the present invention are obtained, but the lower limit is 0.0005% by mass or more, preferably 0.001% by mass or more, more preferably 0.005% by mass or more, and even more preferably 0.01% by mass or more. The upper limit is 12% by mass or less, preferably 11% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less. The lower and upper limits can be combined in any manner, for example, between 0.001 and 10% by mass.
The effects of the present invention can also be obtained in the eyelash cosmetic (first liquid) described below by containing the same amount of water-soluble dye.

<Hydrophilic Polymer (B)>
The oil-based mascara composition contains 0.05 to 25% by mass of a hydrophilic polymer (hereinafter, sometimes referred to as component B). By including the hydrophilic polymer, the water-soluble dye can be caused to develop color and the color of the eyelashes can be changed by further applying an aqueous composition to the dried oil-based mascara composition.

The hydrophilic polymer is not particularly limited as long as it is hydrophilic, but examples include polyvinyl alcohol, polyvinylpyrrolidone, hydroxypropyl cellulose, hydroxyethyl cellulose, highly polymerized polyethylene glycol, cellulose, gelatin, high-methoxyl pectin, low-methoxyl pectin, tamarind gelatin seed polysaccharide, roasted bean gum, pullulan, gum arabic, xanthan gum, guar gum, gellan gum, cellulose gum, rice starch, tapioca starch, agar, alginic acid, carrageenan, and starch-sodium acrylate graft copolymer.

The content of the hydrophilic polymer in the oil-based mascara composition of the present invention is not particularly limited as long as the effects of the present invention are obtained, but the lower limit is 0.05% by mass or more, preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 0.1% by mass or more. The upper limit is 25% by mass or less, preferably 22% by mass or less, more preferably 20% by mass or less, and even more preferably 15% by mass or less. The lower and upper limits can be combined in any manner, for example, between 0.1 and 20% by mass.
The effects of the present invention can also be obtained in the eyelash cosmetic (first liquid) described below by including the same amount of hydrophilic polymer.

《Oily component (C)》
The mascara composition of the present invention is an oil-based mascara composition containing an oil component (hereinafter, sometimes referred to as component C). The inclusion of the oil component provides a smooth feel when used. It should be noted that, as long as the effects of the present invention are achieved, any oil component typically used in eyelash cosmetics can be used. The oil component may be of any origin (animal oil, vegetable oil, synthetic oil, etc.) or of any nature (solid oil, semi-solid oil, liquid oil, etc.), and examples thereof include hydrocarbons, oils and fats, waxes, hydrogenated oils, ester oils, fatty acids, higher alcohols, silicone oils, fluorine-based oils, and oily gelling agents. Specific examples of such waxes include hydrocarbons such as ethylene-propylene copolymer, polyethylene wax, ceresin, synthetic wax, paraffin wax, microcrystalline wax, hydrogenated microcrystalline wax, liquid paraffin, squalane, petrolatum, and polybutene; oils and fats such as olive oil, castor oil, jojoba oil, and macadamia nut oil; waxes such as beeswax, carnauba wax, candelilla wax, and Japan wax; isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, glyceryl trioctanoate, octyldodecyl isostearate, polyglyceryl diisostearate, diglyceryl triisostearate, glyceryl tribehenate, pentaerythrityl rosinate, neopentyl glycol dioctanoate, cholesterol fatty acid esters, and di(cholesteryl-behenyl-octyldodecyl)-N-lauroyl-L-glutamate. Examples of the suitable esters include esters such as oleic acid, palmitic acid, myristic acid, stearic acid, and isostearic acid; fatty acids such as oleic acid, palmitic acid, myristic acid, stearic acid, and isostearic acid; higher alcohols such as stearyl alcohol, cetyl alcohol, lauryl alcohol, oleyl alcohol, isostearyl alcohol, and behenyl alcohol; silicones such as low-polymerization dimethylpolysiloxane, high-polymerization dimethylpolysiloxane, methylphenylpolysiloxane, polyether-modified polysiloxane, polyoxyalkylene-alkylmethylpolysiloxane-methylpolysiloxane copolymer, crosslinked organopolysiloxane, and fluorine-modified polysiloxane; fluorine-based oils such as perfluorodecane, perfluorooctane, and perfluoropolyether; and oil-based gelling agents such as dextrin fatty acid esters, sucrose fatty acid esters, starch fatty acid esters, aluminum isostearate, and calcium stearate. These may be used alone or in combination of two or more.

The content of the oily component in the oil-based mascara composition of the present invention is not particularly limited as long as the effects of the present invention are obtained, but it is preferably 5 to 60% by mass, and more preferably 10 to 40% by mass. The same content of oily component can also be contained in the eyelash cosmetic (first liquid) described below.

《Powder component (D)》
The oil-based mascara composition of the present invention may contain a powder component (hereinafter, sometimes referred to as component D). Examples of powder components include coloring pigments that impart color to the oil-based mascara composition, and extender pigments that maintain the product's formulation and contribute to usability (e.g., spreadability or adhesion). However, in the case of clear mascara, an oil-based mascara composition can be prepared without containing a powder component.
The color pigment may be a colored pigment or a white pigment, and may be an inorganic or organic pigment. The average particle size of the color pigment has a lower limit of 50 nm or more, preferably 100 nm or more, and more preferably more than 100 nm, and an upper limit of, for example, 50 μm or less, preferably 30 μm or less, more preferably 20 μm or less, and even more preferably 15 μm or less.
The extender pigment is not particularly limited as long as it is one that is normally used in mascara, but examples thereof include titanium dioxide, talc, silica, kaolin, mica, synthetic mica, sericite, magnesium carbonate, calcium carbonate, barium sulfate, and a talc/silica/titanium oxide complex. The particle size of the extender pigment is also not particularly limited, but the average particle size is preferably 1 to 100 μm, and more preferably 5 to 80 μm.

Specifically, the powder component is not particularly limited by its shape such as spherical, plate-like, or needle-like, its particle size such as aerosol, fine particle, or pigment-grade, or its particle structure such as porous or non-porous, and examples thereof include inorganic powders, glittering powders, organic powders, pigment powders, metal powders, and composite powders. More specifically, examples thereof include white inorganic pigments such as titanium oxide, zinc oxide, and cerium oxide; colored inorganic pigments such as black iron oxide, yellow iron oxide, red iron oxide, chromium oxide, chromium hydroxide, Prussian blue, and ultramarine; muscovite, phlogopite, lepidolite, biotite, synthetic mica, sericite (sericite), synthetic sericite, kaolin, silicon carbide, bentonite, smectite, silicon oxide, 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, hydroxybenzoate ... White powders such as apatite and boron nitride, pearlescent agents such as titanium oxide coated mica, titanium oxide coated bismuth oxychloride, titanium oxide coated synthetic phlogopite, glass powder, titanium oxide coated glass powder, iron oxide coated glass powder, red iron oxide coated mica titanium, konjou coated mica titanium, carmine coated mica titanium, carmine and konjou coated mica titanium, chromium oxide coated mica titanium, bismuth oxychloride, fish scale foil, iron oxide coated mica, organic pigment coated mica titanium, multi-layer coated mica titanium, silicic acid and titanium oxide coated mica, red iron oxide coating, silicic anhydride, titanium oxide coated silicic anhydride, titanium oxide coated aluminum oxide, and other polyesters. glitter powders of glittering agents such as polyethylene terephthalate-aluminum-epoxy laminated powder, polyethylene terephthalate-polyolefin laminated film powder, polyethylene terephthalate-polymethyl methacrylate laminated film powder, polyamide resins, polyethylene resins, polyacrylic resins, polyester resins, fluorine resins, cellulose resins, polystyrene resins, copolymer resins such as styrene-acrylic copolymer resins, polypropylene resins, silicone resins, urethane resins, and other organic polymer resin powders, organic low molecular weight powders such as zinc stearate, starch, silk powder, cellulose powder, etc. Examples of suitable powders include natural organic powders, organic dye powders 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, and Yellow No. 401, organic pigment powders such as zirconium, barium, or aluminum lakes such as 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, and composite powders such as fine particle titanium oxide-coated mica titanium, fine particle zinc oxide-coated mica titanium, barium sulfate-coated mica titanium, titanium oxide-containing silicon dioxide, and zinc oxide-containing silicon dioxide. These powders can be used alone or in combination of two or more, and composites may also be used.
Furthermore, these powders may be surface-treated using one or more of fluorine-based compounds, silicone-based compounds, metal soaps, lecithin, hydrogenated lecithin, collagen, hydrocarbons, higher fatty acids, higher alcohols, esters, waxes, surfactants, and the like.

The amount of component D in the oil-based mascara composition is not particularly limited as long as the effects of the present invention are achieved, but it is preferably 0.001 to 40% by mass, and more preferably 0.01 to 30% by mass. The eyelash cosmetic (first liquid) described below can also contain the powder component in the same amount.

"solvent"
The oil-based mascara composition of the present invention may contain a solvent that dissolves and/or disperses the above-mentioned components A to D. Examples of the solvent include organic solvents, volatile oils, non-volatile oils, and mixtures thereof, with volatile oils being preferred.

The volatile oil agent is not particularly limited as long as it can be used in cosmetics. Examples include hydrocarbon oils such as light liquid isoparaffin and isododecane, and silicones such as decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, methyltrimethicone, and low-polymerization dimethylpolysiloxane. These can be used alone or in combination of two or more.
Of these, it is preferable to use isododecane or silicones, because isododecane or silicones volatilize quickly and can form a strong cosmetic film, thereby enabling excellent curl retention.
Examples of commercially available products include ISODODECANE (INEOS Oligomers), MARUKAZOL R (manufactured by Maruzen Petrochemical Co., Ltd.), KF995, and TMF-1.5 (both manufactured by Shin-Etsu Chemical Co., Ltd.).
The content of the volatile oil (solvent) in the oil-based mascara composition is not particularly limited as long as the effects of the present invention are obtained, but it is preferably 10 to 60% by mass, and more preferably 20 to 50% by mass. The eyelash cosmetic (first liquid) described below can also contain the oil component in the same content.

<Oil-soluble resin>
The mascara composition of the present invention may contain an oil-soluble resin. The oil-soluble resin can improve the durability of the makeup and maintain curl retention. This oil-soluble resin dissolves in a volatile oil at room temperature and has film-forming properties. There are no particular limitations on the oil-soluble resin, so long as it is usable in cosmetics. Examples include terpene-based resins such as candelilla resin, hydrogenated pentaerythrityl rosinate, and hydrogenated glyceryl abietate; silicone-based resins such as trimethylsiloxysilicate, polymethylsilsesquioxane, and acrylic-silicone graft copolymer; and hydrocarbon-based resins such as polyvinyl isobutyl ether and polyisobutylene.
Commercially available products include, for example, Candelilla Resin E-1 (manufactured by Nippon Natural Products Co., Ltd.), Pine Crystal KE-311 (manufactured by Arakawa Chemical Industries, Ltd.), KF-7312T, KF-7312J (both manufactured by Shin-Etsu Chemical Co., Ltd.), and the like.
Furthermore, from the viewpoint of maintaining excellent curl retention and cosmetic durability, the content of the oil-soluble resin in the entire oil-based mascara composition is preferably 1 to 30% by mass, and more preferably 5 to 20% by mass. The same content of oil-soluble resin can also be contained in the eyelash cosmetic (first liquid) described below.

"fiber"
The mascara composition of the present invention may contain fibers. The fibers are not particularly limited as long as they are those commonly used in cosmetics, and examples thereof include synthetic fibers such as nylon, polyester, and polypropylene, man-made fibers such as rayon, natural fibers such as cellulose, semi-synthetic fibers such as acetate rayon, and fibers made from composites of these.
The length of the fibers used is not particularly limited, but is preferably 0.1 to 10 mm, more preferably 0.5 to 5 mm. The linear density is preferably 0.1 to 20 denier (hereinafter simply referred to as "D"), more preferably 1 to 15 D. One or more of these fibers with different materials, lengths, and linear densities can be used.
The cross-sectional shape of the fiber is not particularly limited, and fibers having a circular, elliptical, polygonal, square, T-shaped, Y-shaped, or other cross-sectional shape can be used. Furthermore, these fibers may be colored with a colorant as needed, or may be surface-treated. Examples of the surface treatment agent include fluorine compounds, silicone oils, powders, oils, gelling agents, emulsion polymers, and surfactants.
The content of fibers in the oil-based mascara composition as a whole is preferably 0.001 to 10% by mass, and more preferably 0.01 to 5% by mass. The eyelash cosmetic (first liquid) described below can also contain the oil-soluble resin in the same content.

Other ingredients
The mascara compositions of the present invention may contain other ingredients commonly found in eyelash cosmetics, such as preservatives, dispersants, antioxidants (e.g., pentaerythrityl tetradi-t-butylhydroxyhydrocinnamate), fragrances, thickeners or texturizers, liquid lipids/oils, viscosity modifiers, film formers, sunscreens, clays, humectants and moisturizers, emulsifiers (e.g., sorbitan oleate), structurants and fillers, surfactants, gloss agents, conditioning agents, cosmetic, dermatological, and pharmaceutical bioactives, vitamins, botanical extracts, coalescing agents/plasticizers, or stabilizers.

Eyelash cosmetics
A first aspect of the eyelash cosmetic of the present invention is a cosmetic for eyelashes containing the oily mascara composition. The oily mascara composition contained in the cosmetic for eyelashes can be the oily mascara composition described in "(1) Oily mascara composition" above. The cosmetic for eyelashes of the present invention may contain the oily mascara composition or may consist of the oily mascara composition.

The eyelash cosmetic composition of the present invention is used by applying it to the eyelashes using, for example, an applicator.

A second embodiment of the eyelash cosmetic of the present invention is an eyelash cosmetic that contains the oily mascara composition as a first liquid and an aqueous composition containing 20% by mass or more of water as a second liquid.

《First liquid》
The first liquid contains the oily mascara composition. The first liquid of the second embodiment of the eyelash cosmetic is the same as the "eyelash cosmetic containing an oily mascara composition" of the first embodiment. The first liquid may contain the oily mascara composition, or may consist of the oily mascara composition.

《Second liquid》
The second liquid is an aqueous composition containing 20% by mass or more of water. The aqueous composition is not particularly limited as long as it contains 20% by mass or more of water, but the water content is preferably 30% by mass or more, more preferably 40% by mass, even more preferably 50% by mass, even more preferably 60% by mass or more, even more preferably 70% by mass or more, and even more preferably 80% by mass or more. In this specification, an emulsion containing oil can be used as the aqueous composition as long as it contains 20% by mass or more of water.

The aqueous composition preferably contains a film-forming agent. By including a film-forming agent, the color of the eyelashes that has changed due to the application of the second liquid can be maintained. In other words, the water-soluble dye dissolved in water is covered with the film-forming agent, protecting the color of the water-soluble dye. The film-forming agent is not particularly limited as long as it is one that is commonly used in the field of cosmetics, but examples include hydrophilic film-forming agents (nonionic polymers, cationic polymers, anionic polymers, or amphoteric polymers), and lipophilic film-forming agents (silicone-based film-forming agents, isobutene-based film-forming agents, and hydrophobic organic polymers).

Hydrophilic film-forming agents include nonionic polymers, cationic polymers, anionic polymers, and amphoteric polymers. Examples of nonionic polymers include polyvinylpyrrolidone (Ruviscol K, manufactured by BASF), vinylpyrrolidone/vinyl acetate copolymer (Ruviscol VA, manufactured by BASF), vinylpyrrolidone/dimethylaminoethyl methacrylate copolymer (Copolymer 937, manufactured by ISP), vinylcaprolactam/vinylpyrrolidone/dimethylaminoethyl methacrylate copolymer (Copolymer VC713, manufactured by ISP), polyvinyl alcohol, polyoxypropylene butyl ether, and styrene/acrylate copolymer (Epitex-66, manufactured by Dow Chemical). Examples of the cationic polymer include cationic polymer compounds such as quaternized vinylpyrrolidone/dimethylaminoethyl methacrylate (GAFQUAT, manufactured by ISP), methylvinylimidazolium chloride/vinylpyrrolidone copolymer (Rubycoat, manufactured by BASF), cationized cellulose, cationized starch, cationized guar gum, vinylpyrrolidone-N,N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate, and diallyl quaternary ammonium salt polymer. Examples of anionic polymers include acrylic acid ester/methacrylic acid ester copolymer (Plussize, manufactured by GOO Chemical Co., Ltd.), vinyl acetate/crotonic acid copolymer (Resin 28-1310, manufactured by NSC Corporation), vinyl acetate/crotonic acid/vinyl neodecanoate copolymer (28-2930, manufactured by NSC Corporation), methyl vinyl ether maleic acid half ester (Gantrez ES, manufactured by ISP Corporation), t-butyl acrylate/ethyl acrylate/methacrylic acid copolymer (Lubimer, manufactured by BASF Corporation), carboxyvinyl polymer (Carbopol 980), Polymer, manufactured by Lubrizol Japan Co., Ltd.), vinylpyrrolidone/vinyl acetate/vinyl propionate copolymer (Ruviskol VAP, manufactured by BASF), vinyl acetate/crotonic acid copolymer (Rubyset CA, manufactured by BASF), vinyl acetate/crotonic acid/vinylpyrrolidone copolymer (Rubyset CAP, manufactured by BASF), vinylpyrrolidone/acrylate copolymer (Rubyflex, manufactured by BASF), acrylate/acrylamide copolymer (Ultrahold, manufactured by BASF), vinyl acetate/butyl maleate/isobornyl acrylate copolymer (Advantage, manufactured by ISP), acrylic resin alkanolamine, and anionic polymer compounds such as urethane-modified acrylic polymers disclosed in WO2005/054341 and WO2008/004502. Examples of emulsion-type film-forming agents include acrylate copolymer (Yodozol GH800F, manufactured by Nouryon Japan), ammonium acrylate copolymer (Daidor 9402S-1, manufactured by Daido Chemical Industry Co., Ltd.), (styrene/acrylates) copolymer (Daidor 5000ST, manufactured by Daito Chemical Industry Co., Ltd.), and polyvinyl acetate (Viniblan GV-5651, manufactured by Nissin Chemical Industry Co., Ltd.). Examples of amphoteric polymers include acetic acid amphoteric dialkylaminoethyl methacrylate polymer (Yukaformer, manufactured by Mitsubishi Chemical Corporation), octylacrylamide acrylate/hydroxypropyl acrylate/butylaminoethyl methacrylate copolymer (AMPHOMER, manufactured by NSC Corporation), and amphoteric polymer compounds such as octylacrylamide-butylaminoethyl methacrylate-hydroxypropyl methacrylate-acrylate copolymer.

Examples of lipophilic film-forming agents include rosin acid resins such as pentaerythritol rosinate and glyceryl rosinate, candelilla resin, polyvinyl isobutyl ether, and polyisobutylene.
The content of the film-forming agent in the second liquid is not particularly limited, but is, for example, 0.0001 to 50% by mass, and preferably 0.001 to 40% by mass.

Specific examples of the second liquid include, but are not limited to, water-based mascara, emulsion, beauty serum, cream, and lotion, as long as it contains water.
In the second embodiment of the cosmetic for eyelashes of the present invention, the first liquid and the second liquid can be provided (sold) separately.

[2] Eyelash Makeup Method The eyelash make-up method of the present invention includes a step of topically applying the oily mascara composition to the eyelashes (hereinafter, may be referred to as step 1), and a step of topically applying an aqueous composition containing 20% by mass or more of water to the eyelashes (hereinafter, may be referred to as step 2).
The oil-based mascara composition can be the oil-based mascara composition described in "(1) Oil-based mascara composition" (the first liquid in the second embodiment of the eyelash cosmetic). The oil-based mascara composition is applied to the eyelashes with an applicator, and the amount applied can be increased or decreased as appropriate.

The aqueous composition can be the second liquid of the second embodiment of the eyelash cosmetic. By applying the second liquid to the eyelashes with a comb brush or the like, the water-soluble dye contained in the oil-based mascara composition is dissolved, allowing the dye color to develop. Furthermore, if the second liquid contains a film-forming agent, the water-soluble dye is protected by the film, allowing the color to be maintained.
The interval between steps 1 and 2 is not particularly limited, but preferably the second liquid is applied after the oil-based mascara composition applied in step 1 has dried to a certain extent. The interval is, for example, 1 minute or more, preferably 3 minutes or more, more preferably 5 minutes or more, even more preferably 10 minutes or more, and even more preferably 30 minutes or more.

As mentioned above, aqueous compositions include water-based mascara, emulsion, serum, cream, and lotion. For example, even if you do not use a dedicated water-based mascara, you can use cosmetics that contain water. Therefore, even if you do not have water-based mascara, you can easily change the color of your eyelashes by applying lotion, for example.

As shown in Figure 1 ("Liquid 1"), no color is observed when only Liquid 1 is applied, but by applying Liquid 2, a pink color is observed, as shown in Figure 1 ("Liquid 1 + Liquid 2"). Furthermore, by selecting the right water-soluble dye for Liquid 1, it is possible to obtain a blue color (Figure 2A) or a yellow color (Figure 2B), as shown in Figure 2.

《Action》
The mechanism by which the eyelash cosmetic of the present invention changes color when the second liquid is applied after the first liquid has not been analyzed in detail, but is presumed to be as follows, although the present invention is not limited to the presumption below.
When the first liquid of the eyelash cosmetic of the present invention is applied and the second liquid is applied to the dried coating, it is believed that the water in the second liquid dissolves the water-soluble dye contained in the first liquid, causing color development. Here, the oil-based mascara composition of the first liquid has an oily base and therefore has low compatibility with the water-based second liquid. It is presumed that in order to make the second liquid more compatible with the first liquid, a hydrophilic polymer is added to the first liquid, thereby improving compatibility between the water-soluble second liquid and the water-soluble dye in the first liquid, resulting in beautiful color development. Therefore, any hydrophilic polymer can be used in the present invention as long as it is hydrophilic to water. Furthermore, any water-soluble dye can be used as long as it is water-soluble.

The present invention will be explained in detail below using examples, but these are not intended to limit the scope of the present invention.

Examples 1 to 5
In this example, eyelash cosmetics containing the first and second liquids of the present invention were prepared using Red No. 227 as the water-soluble dye (component A) and a starch-sodium acrylate graft copolymer as the hydrophilic polymer (component B). Core materials were mixed according to the composition shown in Table 1 to prepare the first liquid. The content of component A was varied from 0.001 to 10% by mass. The second liquid was prepared by mixing 1% carboxyvinyl polymer, 2% pH adjuster, and the remainder water.
As shown in "1st Liquid" in Figure 1, the 1st liquid was applied to the eyelash model and allowed to dry. After about one hour, the 2nd liquid was applied to the eyelash model. As shown in "1st Liquid + 2nd Liquid" in Figure 1, red color development was observed. The color development of Examples 1 to 5 was evaluated according to the following criteria.
◎: Color develops immediately after application of the second liquid ○: Color develops within 5 minutes △: Color develops within 5 minutes to 1 hour ×: No reaction As shown in Table 1, color development was confirmed by applying the second liquid even when the content of component A was increased or decreased.

Examples 6 to 9
In this example, eyelash cosmetics containing a first liquid and a second liquid of the present invention were prepared using Red No. 227 as the water-soluble dye (component A) and a starch-sodium acrylate graft copolymer as the hydrophilic polymer (component B). Core materials were mixed to prepare the first liquid according to the composition shown in Table 1. The content of component B was varied from 0.1 to 20% by mass. The second liquid was prepared by mixing 1% carboxyvinyl polymer, 2% pH adjuster, and the remainder water.
The color development of Examples 6 to 9 was evaluated using the same criteria as in Example 1. As shown in Table 2, color development was confirmed by applying the second liquid, even when the content of Component B was increased or decreased.

Examples 10 to 12 and Comparative Example 1
In this example, the color development after application of the second liquid was investigated using oil (oil-based formulation), emulsion (W/O-based formulation), emulsion (O/W-based formulation), or lotion (aqueous formulation) as the second liquid. The procedure of Example 3 was repeated, except that the second liquid shown in Table 3 was used.

As shown in Table 3, no color development was observed in Comparative Example 1, which did not contain water, but color development was observed in Examples 10 to 12, which contained 20% or more water by mass.

The oil-based mascara composition of the present invention can be used as a cosmetic for eyelashes that allows you to enjoy changing colors.

Claims (8)

(A) 0.0005 to 12% by mass of a water-soluble dye,
An oil-based mascara composition comprising (B) 0.05 to 25% by mass of a hydrophilic polymer, and (C) an oily component ,
The oil-based mascara composition is used in eyelash cosmetics in which the color of eyelashes is changed by applying an aqueous composition containing 20% by mass or more of water after applying the oil-based mascara composition; and
An oil-based mascara composition, wherein the hydrophilic polymer is selected from the group consisting of polyvinyl alcohol, polyvinylpyrrolidone, hydroxypropyl cellulose, hydroxyethyl cellulose, highly polymerized polyethylene glycol, cellulose, gelatin, high-methoxyl pectin, low-methoxyl pectin, tamarind gum, locust bean gum, pullulan, gum arabic, xanthan gum, guar gum, gellan gum, cellulose gum, rice starch, tapioca starch, agar, alginic acid, carrageenan, and starch-sodium acrylate graft copolymer . The oil-based mascara composition according to claim 1, further comprising (D) a powder component. The water-soluble dyes are Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1, Blue No. 2, Red No. 213, Red No. 214, Red No. 227, Red No. 230 (1), Red No. 230 (2), Red No. 231, Red No. 232, Orange No. 205, Orange No. 207, Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 203, Green 3. The oil-based mascara composition according to claim 1, wherein the oil-based mascara composition is one or more selected from the group consisting of No. 201, Green No. 204, Green No. 205, Blue No. 202, Blue No. 203, Blue No. 205, Brown No. 201, Red No. 401, Red No. 503, Red No. 504, Red No. 506, Orange No. 402, Yellow No. 402, Yellow No. 403 (1), Yellow No. 406, Yellow No. 407, Green No. 401, Green No. 402, Purple No. 401, and Black No. 401. A cosmetic for eyelashes, comprising the oily mascara composition according to any one of claims 1 to 3 . A cosmetic for eyelashes comprising the oily mascara composition according to any one of claims 1 to 3 as a first liquid, and an aqueous composition containing 20% by mass or more of water as a second liquid. The eyelash cosmetic according to claim 5 , wherein the aqueous composition is an aqueous mascara, emulsion, serum, cream, or lotion. A method for applying makeup to eyelashes, comprising the steps of: topically applying the oily mascara composition according to any one of claims 1 to 3 to the eyelashes; and topically applying an aqueous composition further comprising 20% by mass or more of water to the eyelashes. The eyelash makeup method according to claim 7 , wherein the aqueous composition is a water-based mascara, emulsion, cream, serum, or lotion.