Pigment dispersion for aqueous cosmetic composition, and aqueous cosmetic composition prepared using the same

Abstract

To provide a pigment dispersion for aqueous cosmetic compositions that exhibits superior dispersibility of aluminum lakes as pigments, including Red No. 40, and an aqueous cosmetic composition prepared using the pigment dispersion, which is suitable for, for example, an eyeliner composition.SOLUTION: A pigment dispersion for aqueous cosmetics and an aqueous cosmetic composition, characterized by comprising at least water and a water-soluble organic solvent, a pigment of an aluminum lake, such as Red No. 40, and a dispersant selected from polyorganic acids and salts thereof or nonionic surfactants.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a pigment dispersion for aqueous cosmetic compositions that exhibits excellent dispersibility and stability over time for aluminum lake pigments such as Red No. 40, and to aqueous cosmetic compositions using the same. [Background technology]

[0002] Conventionally, many makeup cosmetics, such as eyeliners and eyebrow cosmetics, containing dyes or pigments have been used as coloring materials for application to keratinous surfaces such as skin. Among these, dyes are avoided and not widely used due to the possibility that the color may remain on the keratinous surface of skin after application. The applicant of the present application prepared iron oxide pigments such as red iron oxide into extremely fine particles of 30 nm to 100 nm, and used an anionic polymer dispersant and an acid with a molecular weight of 300 or less to disperse the pigments at a shear rate of 192 s -1 In this way, they have achieved makeup cosmetics such as eyeliners and eyebrow cosmetics with low viscosities of 15 mPa·s or less (Patent Document 1). However, since it is a pigment, there are limitations to the color development, and there are currently issues such as color matching and color reproducibility.

[0003] On the other hand, liquid cosmetics containing dyes have good color development and no problems with toning or hue reproduction, but as mentioned above, there are problems with dye adhesion to keratin surfaces and problems with lightfastness, etc. Therefore, lake pigments such as Red No. 40, which are made by reacting these dyes with metals such as aluminum to form salts that are insoluble in water, are used (Patent Document 2). However, this document prefers large particles of up to 500 μm for the pigment, and discloses an emulsion-type cosmetic with extremely high viscosity (27,000 cPa to 434,000 cPa) as the cosmetic material. Such a cosmetic material would be extremely difficult to incorporate into so-called pen-type cosmetics for use as an eyeliner for fine lines, and would also be difficult to handle during production.

[0004] Similarly, organic pigments such as aluminum lakes are preferably mixed at a shear rate of 100 s -1 In Patent Document 3, a cosmetic material containing a high viscosity composition of 1.5 Pa·s or more and 3.0 Pa·s or less is disclosed. Although the cosmetic composition disclosed in this document has a lower viscosity than the cosmetic composition disclosed in Patent Document 2, it still has a very high viscosity, making it difficult to apply evenly and smoothly.

[0005] Furthermore, it has been disclosed that organic pigments such as aluminum lakes can be added to cosmetics in the form of sticks, pressed powders, or loose powders (Patent Document 4). Even in this form, although the performance is good in terms of vivid color development and color reproducibility, it can be said that it is difficult to apply sharp lines uniformly and smoothly. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2015-164912 A (claims, examples, abstract) [Patent Document 2] Patent Publication No. 2012-504570 (Claims, paragraphs

[0050] ,

[0251] , etc.) [Patent Document 3] JP 2023-88285 A (claims, paragraphs

[0037] ,

[0038] ,

[0039] , etc.) [Patent Document 4] Patent No. 7287458 (Claims,

[0045] ,

[0055] , Examples, etc.) Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention is intended to solve the above-mentioned problems of the prior art, and aims to provide a pigment dispersion for aqueous cosmetic compositions that exhibits excellent color development, color reproducibility, and application properties for pigments such as Red No. 40, and that exhibits excellent dispersibility of aluminum lake pigments and stability over time, and an aqueous cosmetic composition that uses the same and is suitable for use in eyeliners, eyebrow cosmetics, and the like. [Means for solving the problem]

[0008] As a result of extensive research into the above-mentioned conventional problems, the present inventors have completed the present invention by providing a pigment dispersion for aqueous cosmetic compositions, characterized by containing at least aluminum lake, a dispersant, and water, and further preparing the pigment dispersion into an aqueous cosmetic composition. Furthermore, the present inventors have discovered that the above-mentioned pigment dispersion for aqueous cosmetic compositions, and aqueous cosmetic compositions suitable for eyeliner compositions or eyebrow cosmetics using the same, can be obtained by preparing a composition containing at least aluminum lake in a proportion of 0.00025 to 30.00 mass%, 0.05 to 15.00 mass% of a dispersant, and at least 2.50 to 30.00 mass% of a film-forming agent, thereby completing the present invention. The dispersant is preferably selected from polyorganic acids and salts thereof, and nonionic surfactants. The aqueous cosmetic composition was prepared at 25°C and a shear rate of 192 s -1 It is preferable that the viscosity at 20.0 mPa·s is 1.5 mPa·s to 20.0 mPa·s. [Effects of the Invention]

[0009] The present invention provides a pigment dispersion for aqueous cosmetic compositions that exhibits excellent dispersibility and stability over time for aluminum lake pigments such as Red No. 40, and an aqueous cosmetic composition using the same that exhibits excellent color development, color reproducibility, and application properties and is suitable for cosmetics such as eyeliners and eyebrow cosmetics. [Brief explanation of the drawings]

[0010] [Figure 1]1 is a longitudinal cross-sectional view showing an example of an embodiment of a rotary-type dispensing liquid cosmetic applicator A of the present invention, showing the state before use. [Figure 2] FIG. 1 is a partial cross-sectional view showing an example of an embodiment of a collector-type direct-dispensing liquid cosmetic applicator B of the present invention. [Figure 3] FIG. 1 is a partial cross-sectional view showing an example of an embodiment of a padded-type liquid cosmetic applicator C of the present invention. [Figure 4] 1A and 1B show an example of an embodiment of a knock-type liquid cosmetic applicator D of the present invention, showing the state before use, with (a) being a front view and (b) being a cross-sectional view. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described in detail. The pigment dispersion for an aqueous cosmetic composition of the present invention is characterized by containing at least an aluminum lake, a dispersant selected from a polyorganic acid and a salt thereof, and a nonionic surfactant, and water. Furthermore, the aqueous cosmetic composition of the present invention, which is suitable for use in eyeliner compositions or eyebrow cosmetics, is characterized by containing at least aluminum lake in an amount of 0.00025 to 30.00 mass%, 0.05 to 15.00 mass% of a dispersant selected from polyorganic acids and salts thereof, and nonionic surfactants, and at least 2.50 to 30.00 mass% of a film-forming agent.

[0012] As mentioned above, the aluminum lake pigments used in the present invention are coloring materials commonly used in cosmetics, such as Red No. 40, Blue No. 1, and Yellow No. 4. For example, an aqueous dispersion of Red No. 40 requires a long dispersion time, and production of the dispersion has problems such as low productivity and low stability over time. However, if the dispersion has the blending characteristics of the present invention, these problems can be solved.

[0013] From the viewpoints of stability after dispersion and convenience in cosmetic production, the content of Red No. 40, Blue No. 1, and Yellow No. 4 used is preferably 1 to 32 mass %, and more preferably 2 to 25 mass %, relative to the total amount of the pigment dispersion for aqueous cosmetic compositions. By setting the content of Red No. 40, Blue No. 1, and Yellow No. 4 to 1% by mass or more, excellent productivity and excellent coloring properties when added to cosmetics are achieved, while by setting the content to 32% by mass or less, dispersibility and stability over time are further improved.

[0014] In the present invention, water is primarily used as the dispersion medium and solvent, but water-soluble organic solvents can also be used. The water-soluble organic solvents that can be used here are those used as dispersion media for pigment dispersions for aqueous cosmetic compositions and solvents for cosmetics, and include lower alcohols having 5 or less carbon atoms. Specific examples include at least one of methyl alcohol (methanol), ethyl alcohol (ethanol), n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, isobutyl alcohol, pentyl alcohol, ethylene glycol, propylene glycol, butylene glycol, and the like (each alone or a mixture of two or more). In particular, from the standpoint of safety and ease of handling, it is desirable to use ethyl alcohol (ethanol).

[0015] The content of the water-soluble organic solvent used is preferably 1.0 to 15.0% by mass, more preferably 50.0 to 90.0% by mass, and even more preferably 60.0 to 80.0% by mass, based on the total amount of the pigment dispersion for aqueous cosmetic compositions, from the viewpoints of the dissolution stability of the dispersant described below, and further the stability of the pigment dispersion, particularly at low temperatures. By adding this water-soluble organic solvent in an amount of 1.0% by mass or more, it is possible to effectively prevent the solvent from freezing at low temperatures and also to exert a slight antiseptic effect, while by adding it in an amount of 15.0% by mass or less, it is possible to avoid adverse effects on the film-forming agent described below and to avoid irritation to the skin during use.By adding water and water-soluble organic solvent in an amount of 50.0% by mass or more, it is possible to achieve low viscosity and also to exert a slight antiseptic effect, while by adding it in an amount of 90.0% by mass or less, it is possible to further improve the solution stability of the dispersant described below.

[0016] The dispersant used in the present invention is a component that improves the dispersibility of aluminum lakes such as Red No. 40 and the stability over time when made into a dispersion. Dispersants are polyorganic acids and their salts, nonionic water-soluble polymers, and nonionic surfactants, and they contain hydrophilic groups in their molecules that allow them to dissolve in water and water-soluble solvents. Aluminum lake particles, such as pigment Red No. 40, are laked by mixing water-soluble tar dyes with aluminum salts, so they readily hydrogen bond with the hydrophilic groups of the dispersants listed here, and are thought to exist in water and water-soluble solvents, wrapping around the aluminum lake particles. In the present invention, the dispersion process is carried out in water or a water-soluble solvent in the presence of a polyorganic acid and its salt, a nonionic water-soluble polymer, and a nonionic surfactant, thereby improving the dispersibility of aluminum lakes such as Red No. 40 and the stability over time when the resulting dispersion is prepared.

[0017] Examples of polyorganic acids and salts thereof that can be used include polylactic acid and salts thereof, polyphosphoric acid and salts thereof, polyacrylic acid and salts thereof, and polyaspartic acid and salts thereof. The polyorganic acid salts used include the salts of polylactic acid, polyphosphoric acid, polyacrylic acid, and polyaspartic acid described above, and the polyorganic acid salts may contain at least one of these salts. Examples of these salts include alkali metal salts, alkaline earth metal salts, ammonium salts, and alkanolamine salts, with sodium salts, potassium salts, and lithium salts being particularly preferred. Among these polyorganic acids or polyorganic acid salts, polyacrylic acid and salts thereof, and polyaspartic acid and salts thereof, have particularly excellent dispersion stability, with sodium polyacrylate and sodium polyaspartate being particularly preferred. Commercially available polyacrylic acids include Polyacrylic Acid 5,000 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) and Aqualic H (manufactured by Nippon Shokubai Co., Ltd.).

[0018] Examples of nonionic water-soluble polymers and acrylate copolymers that can be used include AMPHOMER HC (manufactured by Nouryon Japan Co., Ltd.), Luvimer 100P (an alkyl acrylate copolymer, manufactured by BASF), and ACULYN 33A Rheology Modifier (Dow Chemical Japan Co., Ltd. / Dow Toray Co., Ltd.).

[0019] Examples of nonionic surfactants that can be used include NIKKOL BB30 (behenyl polyoxyethylene 30 mol adduct) and NIKKOL BC-20 (cetyl polyoxyethylene 20 mol adduct) (both manufactured by Nikko Chemicals Co., Ltd.).

[0020] The content of these dispersants used is preferably 0.05 to 17.00 mass% in terms of solid content relative to the total amount of the pigment dispersion for aqueous cosmetic compositions, from the viewpoint of improving the dispersibility of aluminum lakes such as Red No. 40 and the stability over time when the dispersion is prepared. By setting the content of this dispersant to 0.05% by mass or more, the dispersion state of aluminum lakes such as Red No. 40 becomes stable, and also, when blended into cosmetics, the fixation of pigments and the like becomes good. On the other hand, by setting the content to 17.00% by mass or less, 16.50% by mass or less, 16.00% by mass or less, 15.50% by mass or less, or 15.00% by mass or less, the increase in viscosity is suppressed, thereby further improving the convenience of cosmetic production.

[0021] In the present invention, it is more preferable that the blending ratio of the aluminum lake such as Red No. 40 to the dispersant used is aluminum lake such as Red No. 40:dispersant=2:1 to 100:1 by mass. By adjusting this ratio to 2:1 to 100:1, a pigment dispersion for aqueous cosmetic compositions can be obtained that can achieve both high levels of dispersibility and stability over time for aluminum lakes such as Red No. 40.

[0022] The water used as the solvent in the present invention may be distilled water, ion-exchanged water, purified water, pure water, or ultrapure water. The ratio of water to the total solvent (water + water-soluble organic solvent) is 30 to 90%. It is necessary to make it 5 mass % (0.30 to 0.95), and preferably, it is 60 to 95 mass %. % is preferable. If the ratio of water to the total solvent is less than 30% by mass (0.30), the stability over time will be poor. It becomes stable and pigment dispersion becomes impossible, while it exceeds 95% by mass (0.95). In this case, it is impossible to manufacture due to the solvents other than water that are originally contained in each component.

[0023] The pigment dispersion for aqueous cosmetic compositions of the present invention, which is configured in this manner, can resolve issues such as the long dispersion time and poor stability over time of dispersions of aluminum lake pigments such as Red No. 40, and it is possible to obtain a pigment dispersion for aqueous cosmetic compositions that is excellent in dispersibility of aluminum lakes such as Red No. 40 and also has excellent stability over time. The resulting pigment dispersion for aqueous cosmetic compositions is suitable for use in cosmetics that use aluminum lakes such as Red No. 40, and preferred examples include skin care cosmetics, hair cosmetics, antiperspirant cosmetics, makeup cosmetics, UV protection cosmetics, and nail cosmetics, including emulsions, creams, lotions, sunscreens, tanning agents, anti-acne cosmetics, and basic cosmetics such as essences, foundations, eye shadows, eyeliners, eyebrow cosmetics, mascara, blush, nail colors, treatment nails, various gel nails, and makeup cosmetics such as lipsticks, rinses, conditioners, hair colors, setting agents, hair growth agents, deodorants, and perfumes. The product form is also not particularly limited, but since it is a dispersion (aqueous), it can be used in aqueous forms such as liquids, emulsions, creams, pastes, gels, mousses, and sprays. In particular, due to the dispersibility of the pigment dispersion for aqueous cosmetic compositions of the present invention, it is preferably used in aqueous cosmetic compositions such as eyeliner, eyebrow pencil, mascara, and aqueous nail color.

[0024] The pigment dispersion for aqueous cosmetic compositions of the present invention is prepared by preparing the aluminum lake pigment such as Red No. 40, a dispersant, a film-forming agent, water, a water-soluble organic solvent, and other ingredients under suitable dispersion conditions using a dispersing machine such as a homomixer, a sand mill, an ultrasonic homogenizer, or a high-pressure homogenizer, and the like, so that the average particle size of the aluminum lake pigment such as Red No. 40 in the cosmetic (after dispersion) can be adjusted to 150 nm or more and 350 nm or less. An average particle size of more than 350 nm is also acceptable if a stable dispersion system can be obtained.

[0025] The aqueous cosmetic composition of the present invention contains the above-mentioned water-soluble organic solvent, aluminum lake such as Red No. 40, a dispersant, water, and a water-soluble organic solvent. However, in order to further improve dispersibility and the dissolution stability of each component, a pH adjuster, a surfactant, a viscosity adjuster, a chelating agent, etc. may be appropriately used as needed. The pigment dispersion for an aqueous cosmetic composition of the present invention can be prepared by blending the above-mentioned water-soluble organic solvent, aluminum lake such as Red No. 40, dispersant, water, and other components in the above-mentioned content ranges, stirring and mixing the mixture uniformly, and dispersing the mixture using a homomixer or the like. For example, an aqueous cosmetic composition can be prepared by stirring and mixing aluminum lake such as Red No. 40, the various additives described above, and a solvent such as water until uniform using a general-purpose disperser or the like, and then further mixing until uniform using a disperser or the like.

[0026] As a specific embodiment of the aqueous cosmetic composition of the present invention, its use as an eyeliner will be described below. The eyeliner composition may contain at least a pigment dispersion for aqueous cosmetic compositions containing the above-mentioned aluminum lake such as Red No. 40, and general-purpose eyeliner components such as a film-forming agent, and optionally a thickener, a pH adjuster, and a water-soluble organic solvent such as water or a lower alcohol. Furthermore, the eyeliner composition may contain colorants other than the above-mentioned aluminum lake such as Red No. 40, as necessary, depending on the color variations of the eyeliner composition. The content of the pigment dispersion for an aqueous cosmetic composition containing aluminum lake such as Red No. 40 is preferably 0.5 to 30.0% by mass, and more preferably 1.0 to 25.0% by mass, based on the total amount of the eyeliner composition, from the viewpoints of efficacy, solubility, storage stability, etc.

[0027] As colorants other than aluminum lakes such as Red No. 40 that can be used, pigments generally used in eyeliners can be used. For example, inorganic pigments include carbon black, black titanium oxide, yellow iron oxide, black iron oxide, red ochre, ultramarine, ferric iron oxide, chromium oxide, chromium hydroxide, carmine, and shikonin. Organic pigments include Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Red No. 227, Red No. 230 (1), Red No. 230 (2), Red No. 231, Red No. 232, Yellow No. 5, Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 203, Green No. 3, Green No. 201, Green No. 204, Green No. 205, Blue No. 2, Blue No. 202, Blue No. 205, and orange. Barium lake pigments, calcium lake pigments or zirconium lake pigments of water-soluble dyes such as Red No. 205, Orange No. 207, Brown No. 201, Red No. 201, Red No. 202, Red No. 203, Red No. 204, Red No. 205, Red No. 206, Red No. 207, Red No. 208, Red No. 215, Red No. 218, Red No. 219, Red No. 220, Red No. 221, Red No. 223, Red Examples of suitable dyes include No. 225, Red No. 226, Yellow No. 201, Yellow No. 204, Yellow No. 205, Green No. 202, Blue No. 201, Blue No. 204, Blue No. 404, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 206, Orange No. 401, Orange No. 402, Orange No. 403, and Purple No. 201, and at least one of these may be used. When these colorants are used, the content thereof is 0.1 to 25.0% by mass relative to the total amount of the eyeliner composition, in view of line density, ease of toning, storage stability, and the like.

[0028] Specifically, a preferred film-forming agent that can be used is an aqueous emulsion of an acrylic acid-based polymer. Examples of aqueous emulsions of acrylic acid-based polymers include alkyl acrylate copolymer emulsions such as Yodozole GH800F (manufactured by Nouryon Japan, product name, solid content 45% by mass), Yodozole GH810F (manufactured by Nouryon Japan, product name, solid content 46% by mass), Yodozole GH34F (manufactured by Nouryon Japan, product name, solid content 42% by mass), and Daitosol 5000SJ (manufactured by Daito Kasei Kogyo Co., Ltd., product name, solid content 50% by mass).Alkyl acrylate copolymer emulsions such as COVACRYL MS11 (manufactured by Sensient, solid content 57%) can also be used. Examples of alkyl acrylate-styrene copolymer emulsions include Yodosol GH41F (manufactured by Nouryon Japan, product name, solids concentration 45% by mass), Daitosol 5000STY (manufactured by Daito Chemical Industry Co., Ltd., product name, solids concentration 50% by mass), and Emmapoly CE-119N (sold by Nikko Chemicals Co., Ltd., product name). Examples of alkyl acrylate-vinyl acetate copolymer emulsions include Vinizol 2140L (manufactured by Daido Chemical Industry Co., Ltd., product name, solids concentration 45% by mass). The content of these resins is desirably 3.0 to 20.0 mass %, preferably 5.0 to 15.0 mass %, in terms of solid content relative to the total amount of the eyeliner composition, from the viewpoints of water resistance, line adhesion, and application properties.

[0029] Further, examples of water-soluble organic solvents that can be added include lower alcohols. The lower alcohols that can be used are preferred in terms of low-temperature stability, drying properties, and low irritation. Specific examples include at least one of methyl alcohol (methanol), ethyl alcohol (ethanol), n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, isobutyl alcohol, pentyl alcohol, ethylene glycol, propylene glycol, butylene glycol, and the like (each alone or a mixture of two or more). In particular, from the standpoint of safety and ease of handling, it is desirable to use ethyl alcohol (ethanol). The content of these lower alcohols is preferably 1 to 80% by mass, more preferably 1 to 40% by mass, and particularly preferably 5 to 20% by mass, based on the total amount of the eyeliner composition.

[0030] The pH can be suitably adjusted with a pH adjuster or the like until the alkali-soluble acrylic resin dissolves. Examples of the pH adjuster that can be used include 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, triethanolamine, L-arginine, aqueous ammonia, and sodium hydroxide, with aqueous ammonia and 2-amino-2-methyl-1-propanol being particularly preferred.

[0031] The remainder of the eyeliner composition is made up of water (purified water, distilled water, ion-exchanged water, pure water, tap water, etc.). The content of water is preferably 30 to 95% by mass (0.30 to 0.95) relative to the total solvent (water + water-soluble organic solvent), and more preferably 30 to 80% by mass. If the ratio of water to the total solvent is less than 30% by mass (0.30), the stability over time will be poor, and the solution stability will be poor when a water-soluble component is added.On the other hand, if the ratio exceeds 95% by mass (0.95), there is a high possibility that the antibacterial properties will be poor.

[0032] The eyeliner composition thus constructed contains at least the pigment dispersion for aqueous cosmetic compositions containing Red No. 40, a film-forming agent, water and a water-soluble organic solvent, a pH adjuster, and the like. However, the composition may contain other raw materials, such as thickeners, various surfactants, preservatives, ultraviolet absorbers, antioxidants, anti-reducing agents, chelating agents, oily components, fragrances, and animal and plant extracts, as appropriate, provided that the effects of the present invention are not impaired.

[0033] Examples of antibacterial agents that can be used include parabens, sodium dehydroacetate, phenoxyethanol, 1,2-hexanediol, etc. The antibacterial agent of the present invention contains a preservative, and examples of the parabens that serve as preservatives include methyl parahydroxybenzoate, ethyl parahydroxybenzoate, propyl parahydroxybenzoate, butyl parahydroxybenzoate, isopropyl parahydroxybenzoate, etc. that can be used in appropriate amounts.

[0034] Examples of usable thickeners, from the viewpoints of application property, storage stability, and inhibition of pigment sedimentation, include cellulose-based thickeners such as hydroxyethyl cellulose, hydroxypropyl methyl cellulose, stearoxyhydroxypropyl methyl cellulose, hydroxypropyl guar hydroxypropyltrimonium chloride, and cationized cellulose in which a cationic functional group is added to cellulose; resin-based thickeners such as polyvinyl alcohol and acrylic acid; clay-based thickeners such as bentonite; and polysaccharide-based thickeners such as xanthan gum.

[0035] The viscosity of the eyeliner composition is set to 100% at 25°C (cone-plate viscometer: 50 rpm; shear rate 192 s) from the viewpoints of proper viscosity and improved adhesion, including water resistance, improved usability and application when used with an applicator, dischargeability when used with an auto-pen type applicator, and application to the eye area. ‐1 ) is preferably 1.0 to 200 mPa·s, more preferably 1.5 to 40 mPa·s, and even more preferably 1.5 to 15.0 mPa·s. The viscosity range (1.0 to 200 mPa·s) can be adjusted by appropriately adjusting the amount of each of the components used, the type and amount of the thickener preferably used, and the like. By setting the viscosity of this eyeliner composition to 1.0 mPa·s or more, leakage from the container is less likely to occur and the stability of the drawn line after application is increased. On the other hand, by setting the viscosity to 200 mPa·s or less, the composition can be dispensed in an appropriate amount in response to user operation.

[0036] The eyeliner composition of the present embodiment can be prepared by a conventional method. The pigment dispersion for aqueous cosmetic compositions containing the above-mentioned Red No. 40, the film-forming agent, water and a water-soluble organic solvent, the antibacterial agent, and other ingredients are blended in the above-mentioned content ranges, and then the mixture is stirred and mixed uniformly using a suitable kneader or the like, thereby producing an eyeliner composition having the above-mentioned preferred viscosity and pH ranges.

[0037] When using the eyeliner composition of the present embodiment configured as described above, a general-purpose cosmetic applicator can be used, and the shape, structure, etc. of the cosmetic applicator to be used are not particularly limited, and examples include applicators equipped with a collector, applicators equipped with a knock-type valve device, hair mascara-type applicators, tube-type applicators, and applicators equipped with a piston pressing mechanism.

[0038] The obtained aqueous cosmetic composition can be contained in a pen-type applicator having a brush tip as an application part, and can be used by being contained (filled) in, for example, a pen-type liquid cosmetic applicator (container) having a brush tip or pen core as an application part. The liquid cosmetic applicator that can be used is not particularly limited, as long as it is a liquid cosmetic applicator equipped with a brush tip or pen core for use in eyeliner or eyebrows, for example. Preferred examples of the application means include a brush tip (brush pen) or pen core for eyeliner or eyebrow pencil, as well as an applicator having an application body that serves as the application means and is made of rubber, elastomer, or a closed-cell foam having resilience, and having a container for filling with a liquid cosmetic.

[0039] Specifically, as shown in Figures 1, 2, 3, 4(a) and 4(b), it is desirable to use liquid cosmetic applicators that have excellent usability, simplicity and applicability, such as a rotary dispensing type, a collector type applicator, a cosmetic-incorporated applicator type and a knock type applicator. As shown in FIG. 1, the rotary-type dispensing liquid cosmetic applicator A has an applicator section 23 formed from a brush tip (brush pen) provided in front of a cosmetic-containing container 11 that serves as a reservoir from which the liquid cosmetic of the present invention (hereinafter simply referred to as "liquid cosmetic") built in front of the liquid-pressing mechanism 30 is dispensed by the liquid-pressing mechanism 30. Liquid pressing mechanism 30 is configured to supply liquid cosmetic material to application section 23 by rotating delivery member 31, which is arranged at the rear end of barrel body 10, in the circumferential direction relative to barrel body 10, thereby delivering the liquid cosmetic material from container (storage section) 11.

[0040] Liquid pressing mechanism 30 of this applicator comprises: a delivery member 31 rotatably fitted to the rear end of barrel body 10; a drive cylinder that transmits the force of the user's rotation of delivery member 31 to the threaded rod; a threaded body fixed to barrel body 10 and into which the threaded rod screws; a threaded rod having a piston body 32 rotatably engaged at its tip; and piston body 32 that slides within reservoir 11 of barrel body 10. The rotation of delivery member 31 is transmitted to the threaded rod via the drive cylinder, and the rotation of the threaded rod causes the threaded rod and piston body 32 to advance via the female threads of a nut-shaped threaded body, thereby delivering the liquid cosmetic from reservoir 11 to applicator part 23.

[0041] Advancing member 31 has a cylindrical operating portion rotatably fitted into and exposed from the rear end of barrel body 10. A drive tube is fitted into advancing member 31 and fixed in the direction of rotation, and a threaded body is attached to the drive tube so as to be fixed in the direction of rotation and movable relative to the drive tube in the axial direction. The crown is a spring member that urges advancing member 31, which serves as a rotating body, rearward. In this applicator, a seal portion, joint member 22, front barrel 20, and applicator portion 23 are attached by fitting to the front end of barrel body 10. A liquid cosmetic is stored in reservoir 11 of barrel body 10, and the liquid cosmetic dispensed from reservoir 11 passes through a flow path within the joint member and is ejected into applicator portion 23, ready for application. In addition, the applicator is configured so that cap 40 can be attached to front barrel 20 so as to cover applicator portion 23 and front barrel 20 after use.

[0042] 1, reference numeral 15 denotes a stirring ball that stirs the liquid cosmetic in the storage portion 11 by reciprocating motion, and reference numeral 13 denotes a sealing ball. An inner cap is provided inside the cap 40, and the inner cap is biased backward by a rearward biasing spring. In the case of a liquid cosmetic having good dispersibility, such as that of the present invention, the stirring ball 15 may be omitted. Furthermore, reference numeral 14 in the drawings denotes a stopper having a ring-shaped portion attached between the rear end of front barrel 20 and the front surface of the stepped portion at front end 12 of barrel body 10, in order to position the sealing portion, coupling member 22, front barrel 20, and applicator portion 23 in a position that closes the flow path of the liquid cosmetic material heading toward applicator portion 23 when the pen is not in use. This stopper 14 has a portion of the ring-shaped portion that is cut away, and a tab is integrally formed on the opposite side of the cut-away portion; by pulling the tab, the ring-shaped portion expands in diameter from the cut-away portion, allowing it to be removed from between the rear end of front barrel 20 and front end 12 of barrel body 10.

[0043] As shown in Figure 1, when not in use, the seal ball 13 fits into the inner diameter of the seal portion, which serves as the seal ball receiver, creating a seal so that the liquid cosmetic does not flow into the applicator portion 23. On the other hand, when in use, the user pulls the stopper 14 out of the barrel body 10 and pushes the front barrel 20 toward the rear end, causing the narrow rear end portion of the coupling member 22 to abut against the seal ball 13, removing the seal ball 13 from the inner diameter of the seal portion and entering the reservoir 11, and the liquid cosmetic in the reservoir 11 flows from the inner diameter of the coupling member 22 into the liquid flow path of the applicator portion 23, and is supplied to the applicator portion 23 from its interior, making it possible to apply the liquid cosmetic to the target area.

[0044] FIG. 2 shows a collector-type, direct-flow liquid cosmetic applicator that contains the liquid cosmetic composition for eye makeup of the present invention. 2, an example of this liquid cosmetic applicator B is one in which the aqueous cosmetic composition 50 of the present invention is filled into a tank portion 51, which serves as a shaft body that directly stores the composition without being absorbed into a padding or the like. A sheet (ink reservoir, collector member) 52 is built into the front portion of this tank portion 51 to temporarily retain the aqueous cosmetic composition 50 that is forced out of the tank portion 51 when the air inside the tank portion 51 expands due to a temperature rise or the like, to prevent it from dripping from the pen tip or air hole, and a brush-shaped pen tip (brush tip) 53 that serves as the applicator is provided at the tip of the collector member 52. The brush-shaped pen tip (brush tip) 53 may be a brush tip with a circular cross section or an irregular cross section other than a square.

[0045] The aqueous cosmetic composition is discharged from the tank portion 51 to the pen tip 53 by being discharged from the tank portion 51 to the pen tip 53, which serves as the application portion of the aqueous cosmetic composition 50, via a relay core 55 having an application liquid flow path 54 attached to the central hole of the collector member 52. 2, reference numerals 56 and 57 denote holder members, 58 denotes a rear shaft body fixed to the rear of the tank portion 51, and 59 denotes a cap having an inner cap. Alternatively, the rear of the pen tip 53 may be placed directly inside the tank portion 51 without the intermediate core 55, thereby allowing the aqueous cosmetic composition to be dispensed. The liquid cosmetic applicator B of this form can be used in the same manner as the liquid cosmetic applicator A by removing the cap 59.

[0046] FIG. 3 shows the application of the aqueous eye makeup cosmetic composition of the present invention to a padded-type liquid cosmetic applicator C. 3, a liquid cosmetic applicator C of this type has an inner shaft 61 inside a cosmetic tool body 60, an impregnated body 62 made of a porous material impregnated with the liquid cosmetic composition of the present invention housed inside the inner shaft 61, an applicator body 63 made of a brush tip with an irregular cross section for applying the aqueous cosmetic composition provided at the tip side of the impregnated body 62, and a tail plug 64 fixed to the rear end of the inner shaft 61. Reference numeral 65 denotes a cap body having an inner cap portion 66. The liquid cosmetic applicator C of this type is ready for use by removing the cap 65.

[0047] FIG. 4 shows the application of the aqueous eye makeup cosmetic composition of the present invention to a direct-dispensing knock-type liquid cosmetic applicator D. 4(a) and (b), liquid cosmetic applicator D is a container that can dispense liquid cosmetic material from storage section 124 by pressing crown 112, which is disposed at the rear end of barrel body 110, forward in the axial direction. More specifically, it has knock mechanism K that converts the pressing force of crown 112, which is generated by a user's knocking operation, into a rotational force, screw body 128 fixed to barrel body 110, and threaded rod 130 that is threadedly engaged with threaded body 128, and the rotational force converted by knock mechanism K is used to rotate threaded rod 130, thereby moving threaded rod 130 forward via threaded body 128 and dispensing the content.

[0048] In cosmetic applicator D, joint 114, pipe joint 116, pipe 118, front barrel 120, and neck 122 are attached to front end 110a of barrel body 110, and the content (aqueous cosmetic composition) dispensed from storage section 124 within barrel body 110 is discharged through pipe 118 to neck 122. The applicator is also configured so that cap 126 can be attached after use.

[0049] Note that reference numeral 124a denotes a stirring ball that stirs the contents in storage section 124 by reciprocating motion, 126a denotes an inner cap, 126b denotes a spring that biases the inner cap rearward, and plug 127 denotes a plug that blocks the flow of the contents to pipe 118 and beyond when not in use. At the rear end of pipe 118, seal ball 124b fits tightly against the inner diameter of joint 114 to prevent the contents from flowing into pipe 118 when not in use, but when in use, by pulling plug 127 out of barrel body 110 and pushing front barrel 120 towards the rear end, seal ball 124b is removed from the inner diameter of joint 114, allowing the contents to flow into pipe 118 and be applied. [Example]

[0050] Next, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0051] [Production Examples 1 to 13 and Comparative Production Examples 1 to 10: Preparation of pigment dispersions for aqueous cosmetic compositions] A pigment dispersion for an aqueous cosmetic composition was prepared by dispersing aluminum lake such as Red No. 40, a dispersant selected from polyorganic acids and their salts, or nonionic surfactants in proportion to the formulation shown in Tables 1 and 2 below, water, and a water-soluble organic solvent using a bead mill.

[0052] [Examples 1 to 13 (Table 1) and Comparative Examples 1 to 10 (Table 2): Preparation of Eyeliner Compositions] A film-forming agent and the like were further added to the obtained pigment dispersions for aqueous cosmetic compositions of Production Examples 1 to 13 and Comparative Production Examples 1 to 10, and the mixture was mixed and stirred to obtain the formulations shown in Tables 1 and 2 below, to prepare eyeliner compositions. The evaluation results are shown in Tables 1 and 2 below.

[0053] [Measurement of Viscosity of Eyeliner Composition] The eyeliner compositions of Examples 1 to 13 and Comparative Examples 1 to 10 obtained by the above method were measured for viscosity at 25°C using a cone-plate viscometer (TVE-25, manufactured by Toki Sangyo Co., Ltd.). The viscosity was measured at a shear rate of 192 s-1 The viscosity was measured under the following conditions. (Measurement of particle size of eyeliner composition) The average particle size of each of the obtained pigment dispersions for aqueous cosmetic compositions was measured at 25°C using a particle size distribution measuring device (FPAR-1000 (manufactured by Otsuka Electronics Co., Ltd.)).

[0054] (Method for evaluating coatability) The obtained eyeliner composition was filled into the above-mentioned applicator B (collector-type eyeliner container), and applied to the skin of a monitor, and the applicability was evaluated according to the following evaluation criteria. A: The cosmetic material was dispensed and applied without any problems. B: The product can be dispensed and applied to the skin, but there are some areas where the lines are faint. C: The cosmetic material is not properly discharged from the container and cannot be applied to the skin.

[0055] (Color development upon application) As in the evaluation of the application properties described above, each eyeliner composition was filled into applicator B and applied to the skin of 10 monitors, and the color development was evaluated according to the following evaluation criteria. A: All 10 monitors felt that the colors were very good. B: More than 7 out of 10 monitors felt that the colors were good. C: More than 3 out of 10 monitors felt that the colors were good. D: None of the monitors felt that the color was good.

[0056] (Line adhesion) As in the evaluation of application property described above, each eyeliner composition was filled into applicator B and applied to the skin of 10 monitors. After the drawn lines had dried, the applied surface was rubbed with the pad of a finger, and adhesion was evaluated according to the following evaluation criteria. A: The monitor who applied the product rubbed the paint with the pads of his or her own fingers 10 times, but there was no change in the drawn lines. B: After applying the product, the monitors rubbed the area with the pads of their own fingers 10 times, and three out of ten observed slight changes. C: After applying the product, the monitors rubbed the product 10 times with the pads of their own fingers, and 7 out of 10 observed a change in the drawn lines. D: After applying the product, the monitors rubbed the surface 10 times with the pads of their own fingers, and all of the monitors observed a change in the drawn lines or the drawn lines were erased.

[0057] (water resistance) As in the evaluation of the application property described above, each of the obtained eyeliner compositions was filled into applicator B and applied to the skin. After the drawn line had dried, the applied surface was subjected to the above-mentioned adhesion test in running water, and the water resistance was evaluated according to the following evaluation criteria. A: The monitor who applied the product rubbed the paint with the pads of his or her own fingers 10 times, but there was no change in the drawn lines. B: After applying the product, the monitors rubbed the area with the pads of their own fingers 10 times, and three out of ten observed slight changes. C: After applying the product, the monitors rubbed the product 10 times with the pads of their own fingers, and 7 out of 10 observed a change in the drawn lines. D: After applying the product, the monitors rubbed the surface 10 times with the pads of their own fingers, and all of the monitors observed a change in the drawn lines or the drawn lines were erased.

[0058] (Make-off (non-staining to skin)) As in the evaluation of the application property described above, each of the obtained eyeliner compositions was filled into applicator B and applied to the skin. After 8 hours or more had passed, makeup was removed from the applied surface using a commercially available makeup remover (Biore (registered trademark) makeup remover cotton; manufactured by Kao Corporation), and the makeup removal property (staining property) was evaluated according to the following evaluation criteria. A: The lines were not recognizable after the makeup was removed. B: Lines remained even after makeup was removed (pigmentation had occurred).

[0059] [Table 1]

[0060] [Table 2]

[0061] As is clear from the results in Tables 1 and 2 above, the eyeliner compositions of Examples 1 to 13 had good discharge and application performance when used with applicator B, which was a collector type with a relay core and an application tip, and were confirmed to be superior in all aspects of color development, adhesion, water resistance, and makeup removal ability compared to the eyeliner compositions of Comparative Examples 1 to 10. [Industrial Applicability]

[0062] The present invention provides a pigment dispersion for aqueous cosmetic compositions that has excellent dispersibility of aluminum lake pigments such as Red No. 40, and an aqueous cosmetic composition using the same that is suitable for eyeliner compositions and the like. [Explanation of symbols]

[0063] 10, 60, 110 shaft body 11 Storage section (accommodation section) 12 Front end of shaft body 13, 124b Seal Ball 14, 127 Stopper 15, 124a Stirring ball 20, 120 front axis 21 Front barrel body 23, 53, 63, 122 Brush tip (application part) 24, 54, 116 Relay core, pipe 51 Tank section 52 Collector member 61 Inner shaft 62 Impregnated body (batting) K Knock mechanism

Claims

1. A pigment dispersion for an aqueous cosmetic composition, comprising at least an aluminum lake, at least one dispersant selected from polyorganic acids and their salts, or nonionic surfactants, water, and a water-soluble organic solvent.

2. 2. The pigment dispersion for an aqueous cosmetic composition according to claim 1, wherein the content of the dispersant is 0.05 to 17.00 mass% in terms of solid content, relative to the total amount of the pigment dispersion for an aqueous cosmetic composition.

3. The aqueous cosmetic composition comprises at least aluminum lake in a proportion of 0.00025 to 30.00% by mass, 0.05 to 15.00% by mass of a dispersant selected from polyorganic acids and salts thereof, or nonionic surfactants, at least 2.50 to 30.00% by mass of a film-forming agent, water, and a water-soluble organic solvent.

4. 25°C, shear rate 192 s －１ 4. The aqueous cosmetic composition according to claim 3, wherein the viscosity at 1000 kJ / min is 1.5 mPa·s to 20.0 mPa·s.

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