Water-based liquid cosmetic

Abstract

The present invention provides a novel aqueous liquid cosmetic that contains plant-derived carbon particles at a low concentration while exhibiting good color development, water resistance, sebum resistance, storage stability, and non-drying properties when the tip of the applicator is exposed. [Solution] The aqueous liquid cosmetic composition of the present invention is It contains at least an aqueous solvent, plant-derived carbon particles, resin particles, and a surfactant. The content of the plant-derived carbon particles is less than 22% by mass of the aqueous liquid cosmetic composition. The ratio of the mass of the plant-derived carbon particles to the mass of the surfactant is 10 to 200, and Temperature 25℃, shear rate 191.5s -1 The viscosity measured is 10 mPa·s or less.

Description

Technical Field

[0001] The present invention relates to an aqueous liquid cosmetic.

Background Art

[0002] In cosmetics, particularly makeup cosmetics, the color possessed by the cosmetic is of great significance, and various coloring materials are used therefor. Among these, cosmetics using various pigments as black coloring materials have been proposed.

[0003] Patent Document 1 discloses an aqueous dispersion characterized by containing water, at least 22 to 40 mass% of a black pigment, a dispersant which is a polymer or a surfactant having an HLB of 10 or more at a mass% ratio of 30:1 to 3:1 relative to the black pigment, and a polyhydric alcohol at a mass% ratio of 3:1 to 5:3 relative to the black pigment, and having an average particle diameter (cumulative average diameter / median diameter) of 340 to 392 nm and a lightness L value of less than 24, as well as a cosmetic containing the same.

[0004] Patent Document 2 discloses an aqueous dispersion containing at least fine iron oxide particles having a major axis of primary particles of 400 nm or less as a pigment, an anionic polymer, a nonionic surfactant having an HLB of 12 or more, and water, wherein the content of the fine iron oxide particles is 10 to 60 mass% in the total composition, the aqueous dispersion being produced by a fine iron oxide dispersion step of subjecting only the fine iron oxide particles, the anionic polymer and water to dispersion treatment, then adding the nonionic surfactant and further performing dispersion treatment.

[0005] Patent Document 3 discloses a liquid cosmetic composition characterized by containing 50 to 90 mass% of water and 1 to 10 mass% of charcoal.

[0006] Patent Document 4 discloses fine plant charcoal powder having a carbon content of 96 mass% or more, which is controlled to have an average particle diameter of 0.15 to 0.7 μm and a minimum particle diameter of 0.1 μm or more by pulverization, and a cosmetic containing the same.

Prior Art Documents

[0007] [Patent Document 1] Japanese Patent Publication No. 2023-13339 [Patent Document 2] Japanese Patent Publication No. 2014-101298 [Patent Document 3] Japanese Patent Publication No. 2006-22008 [Patent Document 4] Japanese Patent Publication No. 2022-27367 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The cosmetic composition described in Patent Document 1 had good color development, water resistance, and sebum resistance. However, when the applicator filled with the cosmetic composition was left standing upright, especially at high temperatures, a uniform line could not be obtained, indicating room for improvement in storage stability. In addition, a non-drying problem sometimes occurred, such as streaking when the tip of the applicator was left exposed.

[0009] The present invention provides a novel aqueous liquid cosmetic that contains plant-derived carbon particles at a low concentration while exhibiting good color development, water resistance, sebum resistance, storage stability, and non-drying properties when the tip of the applicator is exposed. [Means for solving the problem]

[0010] The inventors, after diligent research, discovered that the above problems could be solved by the following means, and thus completed the present invention. That is, the present invention is as follows: <Aspect 1> An aqueous liquid cosmetic composition, It contains at least water, plant-derived carbon particles, a film-forming agent, and a surfactant. The content of the plant-derived carbon particles is less than 22% by mass of the aqueous liquid cosmetic composition. The ratio of the mass of the plant-derived carbon particles to the mass of the surfactant is 10 to 200, and 25℃, shear rate 191.5s -1 The viscosity measured is 10 mPa·s or less. Water-based liquid cosmetic. <Aspect 2> The aqueous liquid cosmetic composition according to Aspect 1, wherein the HLB value of the surfactant is 8.0 or higher. <Aspect 3> An applicator having the aqueous liquid cosmetic composition described in Aspect 1 or 2. <Aspect 4> The applicator according to aspect 3, having a brush-type or fiber bundle core-type applicator. [Effects of the Invention]

[0011] The present invention provides a novel aqueous liquid cosmetic that contains plant-derived carbon particles at a low concentration while exhibiting good color development, water resistance, sebum resistance, storage stability, and non-drying properties when the tip of the applicator is exposed. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a partial cross-sectional view showing a first embodiment of a liquid cosmetic applicator for containing an aqueous liquid cosmetic according to the present invention. The mechanism in Figure 1 is an example of a rotary dispensing type. [Figure 2] Figure 2 is a partial cross-sectional view showing a second embodiment of the liquid cosmetic applicator for containing the aqueous liquid cosmetic of the present invention. The mechanism in Figure 2 is an example of a cosmetic-integrated applicator type. [Figure 3] Figure 3(a) is a perspective view showing a third embodiment of a liquid cosmetic applicator for containing an aqueous liquid cosmetic of the present invention, and Figure 3(b) is a partial cross-sectional view of the same liquid cosmetic applicator as in Figure 3(a). The mechanism of the liquid cosmetic applicator in Figures 3(a) and (b) is an example of a collector-type applicator. [Modes for carrying out the invention]

[0013] Water-based liquid cosmetics The aqueous liquid cosmetic composition of the present invention is It contains at least an aqueous solvent, plant-derived carbon particles, a film-forming agent, and a surfactant. The content of the plant-derived carbon particles is less than 22% by mass relative to the mass of the aqueous liquid cosmetic, The ratio of the mass of the plant-derived carbon particles to the mass of the surfactant is 10 to 200, and The viscosity measured at a temperature of 25°C and a shear rate of 191.5s -1 is 10 mPa·s or less.

[0014] Charcoal (plant-derived carbon particles) generally has lower color development properties compared to carbon black and the like, and therefore, conventionally, as in Patent Document 1, use at a relatively high concentration has been studied in order to maintain high color development properties.

[0015] In contrast, the present inventors have found that by intentionally using charcoal at a low concentration and lowering the viscosity of the entire aqueous liquid cosmetic, the dispersibility of charcoal can be improved and the outflow amount of the aqueous liquid cosmetic can be increased, whereby good color development properties can be maintained even when the charcoal concentration is low.

[0016] Furthermore, the present inventors have found that, unexpectedly, by lowering the charcoal concentration, the stability of the concentration distribution across the top and bottom of the cosmetic, particularly the stability of the concentration distribution across the top and bottom during high-temperature storage, and the non-drying property can also be further improved.

[0017] The viscosity of the cosmetic of the present invention measured at a temperature of 25°C and a shear rate of 191.5s -1 is 10 mPa·s or less. This viscosity may be 1 mPa·s or more, 2 mPa·s or more, 3 mPa·s or more, 4 mPa·s or more, or 5 mPa·s or more, and may be 10 mPa·s or less, 9 mPa·s or less, 8 mPa·s or less, or 7 mPa·s or less.

[0018] Hereinafter, each constituent element of the present invention will be described.

[0019] <Aqueous Solvent> The aqueous solvent is a solvent containing at least water. The aqueous solvent may further contain an organic solvent, particularly a water-soluble organic solvent.

[0020] Herein, in this specification, "aqueous solvent" means a solvent that contains water in the highest mass ratio among the liquid media constituting the solvent. In particular, an aqueous solvent may contain water in a majority proportion, or may consist solely of water. When an aqueous solvent contains an organic solvent, the water content in the aqueous solvent may be 50% by mass or more and 99% by mass or less relative to the mass of the aqueous solvent. This content may be 50% by mass or more, 55% by mass or more, or 60% by mass or more, and may also be 99% by mass or less, 95% by mass or less, 90% by mass or less, 85% by mass or less, 80% by mass or less, or 75% by mass or less.

[0021] Furthermore, the content of the aqueous solvent may be 50% by mass or more and 90% by mass or less, relative to the mass of the aqueous liquid cosmetic composition of the present invention. This content may be 50% by mass or more, 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, or 75% by mass or more, and may also be 90% by mass or less, 85% by mass or less, or 80% by mass or less.

[0022] For example, ion-exchanged water or distilled water can be used as the water source.

[0023] Examples of water-soluble organic solvents that can be used include glycerin, diglycerin, ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, polyhydric alcohols such as 1,3-butylene glycol, 1,2-hexanediol, pentylene glycol, and caprylyl glycol, and glycol ethers such as propylene glycol monomethyl ether and 3-methoxy-3-methyl-1-butanol.

[0024] <Plant-derived carbon particles> As plant-derived carbon particles, for example, black pigments obtained by firing or processing plant materials such as wood and grass or processed products thereof can be used. Examples of such plant-derived carbon particles include at least one type of plant-derived charcoal (each individually or in mixtures of two or more types; the same applies hereinafter), such as bamboo charcoal, hemp charcoal, oak charcoal, sawtooth oak charcoal, chestnut charcoal, ubame oak charcoal (binchotan charcoal), larch charcoal, pine charcoal, cedar charcoal, plum charcoal, cypress charcoal, eucalyptus charcoal, mangrove charcoal, camellia charcoal, olive charcoal, acacia charcoal, peach black (peach pit charcoal), vine black (grape black), activated charcoal, and vegetable carbon (plant-derived carbon black).

[0025] The particle shape of these plant-derived pigments is not particularly limited and can be spherical, granular, rod-shaped, needle-shaped, plate-shaped, or irregular in shape; any shape can be used.

[0026] The content of plant-derived carbon particles is less than 22% by mass relative to the mass of the aqueous liquid cosmetic. This content may be less than 22% by mass, 20% by mass or less, 17% by mass or less, 15% by mass or less, or 14% by mass or less, and may also be 1% by mass or more, 3% by mass or more, 5% by mass or more, 7% by mass or more, 10% by mass or more, or 12% by mass or more.

[0027] <Film-forming agent> The film-forming agent is contained in the aqueous liquid cosmetic composition of the present invention. By using the film-forming agent, it is possible to impart durability to lines applied to the skin against water, sweat, and sebum.

[0028] Examples of film-forming agents include acrylates copolymer, ammonium acrylates copolymer, (styrene / acrylates) copolymer, and (acrylates / ethylhexyl acrylate) copolymer.

[0029] Examples of such film-forming agents include commercially available products such as DAITOSOL 5000STY, DAITOSOL 5000AD, DAITOSOL 5000SJ, DAITOSOL 4000SJT, DAITOSOL 5500GM, and DAI TOSOL 5000PO (manufactured by Daito Chemical Industries Co., Ltd.), Yodozol GH34F, Yodozo GH800F (manufactured by Nurion Japan Co., Ltd.), Vinizol 1086DB, Vinizol Zol 1087FT, Vinizol 1089HT, Vinizol 1012JC, Vinizol 1 013JH, Vinysol 2140L, Vinysol 2140LH, Vinysol 1086WP Examples include Vinysol 1087FT, Vinysol 1089HT (both manufactured by Daido Chemical Industries Co., Ltd.), and Emapoly CE-119N (manufactured by Gifu Cerac Co., Ltd.).

[0030] The solid content of the film-forming agent may be 1% by mass or more and 20% by mass or less, relative to the mass of the aqueous liquid cosmetic. This content may be 1% by mass or more, 3% by mass or more, 5% by mass or more, 7% by mass or more, or 8% by mass or more, and may also be 20% by mass or less, 17% by mass or less, 15% by mass or less, 12% by mass or less, 10% by mass or less, or 9% by mass or less.

[0031] <Surfactants> The surfactant is contained in the aqueous liquid cosmetic composition of the present invention. Suitable surfactants include polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyalkylene sterols, polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyethylene glycol fatty acid esters, and the like. Among these, the use of polyglycerin fatty acid esters is preferred from the viewpoint of controlling the concentration difference between upper and lower parts of the solution.

[0032] The HLB value (hydrophilic-lipophilic balance value) of the surfactant is preferably between 8.0 and 20.0 from the viewpoint of ensuring good concentration differences between upper and lower concentrations under high-temperature conditions. This HLB value may be 8.0 or higher, 10.0 or higher, 12.0 or higher, or 14.0 or higher, and may also be 20.0 or lower, 19.0 or lower, 17.0 or lower, or 16.0 or lower. This HLB value is obtained by oil-in-water (O / W) emulsification testing. When using commercially available surfactants, catalog values ​​may be adopted.

[0033] Examples of polyglycerin fatty acid esters include glyceryl stearate, polyglyceryl-10 isostearate, polyglyceryl-10 laurate, polyglyceryl-10 myristate, polyglyceryl-10 oleate, polyglyceryl-10 stearate, polyglyceryl-10 diisostearate, polyglyceryl-10 distearate, polyglyceryl-6 laurate, polyglyceryl-6 myristate, polyglyceryl-6 stearate, polyglyceryl-3 laurate, and polyglyceryl-10 palmitate.

[0034] Examples of polyoxyethylene glycerol fatty acid esters include PEG-7 glyceryl coconut oil fatty acid, PEG-5 glyceryl stearate, and PEG-15 glyceryl stearate.

[0035] Examples of polyoxyethylene sorbitan fatty acid esters include sorbitan laurate, PEG-20 sorbitan isostearate, polysorbate 20, polysorbate 80, PEG-5 sorbitan oleate, polysorbate 85, polysorbate 60, polysorbate 65, and PEG-6 sorbitan stearate.

[0036] Examples of polyoxyethylene sorbitol fatty acid esters include sorbeth-6 laurate, sorbeth-6 tetraoleate, sorbeth-40 tetraoleate, and sorbeth-60 tetraoleate.

[0037] Examples of hydrogenated polyoxyethylene castor oil include PEG-20 hydrogenated castor oil, PEG-30 hydrogenated castor oil, PEG-40 hydrogenated castor oil, PEG-50 hydrogenated castor oil, PEG-60 hydrogenated castor oil, PEG-80 hydrogenated castor oil, and PEG-100 hydrogenated castor oil.

[0038] Examples of polyoxyalkylene sterols include PEG-5 phytosterol, PEG-10 phytosterol, PEG-20 phytosterol, PEG-30 phytosterol, and PEG-25 phytostanol.

[0039] Examples of polyoxyethylene alkyl ethers include beheneth-10, beheneth-20, beheneth-30, ceteth-2, ceteth-6, ceteth-7, ceteth-10, ceteth-15, ceteth-20, ceteth-23, ceteth-25, ceteth-30, ceteth-40, laureth-4, laureth-9, laureth-21, laureth-25, oleth-7, oleth-10, oleth-15, oleth-20, oleth-50, steareth-2, steareth-4, steareth-20, (C12-C14)pareth-5, (C12-C14)pareth-7, (C12-C14)pareth-9, and (C12-C14)pareth-12.

[0040] Examples of polyoxyethylene polyoxypropylene alkyl ethers include PPG-4 ceteth-1, PPG-4 ceteth-10, PPG-4 ceteth-20, PPG-8 decyltetradeceth-20, PPG-8 ceteth-20, PPG-4 ceteth-20, PPG-6 decyltetradeceth-20, and PPG-6 decyltetradeceth-30.

[0041] Examples of polyethylene glycol fatty acid esters include PEG-10 stearate, PEG-25 stearate, PEG-40 stearate, PEG-45 stearate, and PEG-55 stearate.

[0042] <Other ingredients> The aqueous liquid cosmetic composition of the present invention may contain other optional components. Examples of other components include dispersants, preservatives, active ingredients, antioxidants, neutralizing agents, UV absorbers, chelating agents, pH adjusters, fragrances, viscosity modifiers, water-soluble dyes, resin particle pigments, and other colorants. These other components may be used individually or in combination. The content of these other components may be determined appropriately within a range that does not impair the effects of the present invention.

[0043] Any dispersant can be used as a dispersant. In particular, using an acrylic dispersant provides not only improved dispersion stability for plant-derived carbon particles but also durability against water, sweat, and sebum for lines applied to the skin.

[0044] Examples of acrylic dispersants include acrylic polymers with a mass-average molecular weight of 1,000 to 80,000, specifically acrylates copolymers, (styrene / acrylates) copolymers, and (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate)acrylates copolymers having a mass-average molecular weight within the above range.

[0045] Examples of such acrylic dispersants include commercially available products such as Luvimer 100P (manufactured by BASF Japan), AMPHOMER HC (manufactured by Nurion Japan), SYNTRAN EX149PE, and SYNTRAN 5402 (manufactured by Interpolymer). Acrylates copolymer ammonium is particularly preferred from the viewpoint of adhesion.

[0046] Examples of preservatives include benzoic acid, ammonium benzoate, ethyl benzoate, isobutyl benzoate, methyl benzoate, potassium benzoate, sodium benzoate, aluminum benzoate, chlorcresol, chlorobutanol, salicylic acid, sodium salicylate, titanium salicylate, magnesium salicylate, triethanolamine salicylate, sorbic acid, potassium sorbate, calcium sorbate, propionic acid, sodium propionate, calcium propionate, dehydroacetic acid, sodium dehydroacetate, undecylenic acid, potassium undecylenate, triclosan, methylparaben, ethylparaben, propylparaben, butylparaben, and methylparaben. Sodium, isobutylparaben, isopropylparaben, benzylparaben, phenoxyethanol, benzyl alcohol, phenol, sodium lauryl diaminoglycinate, resorcinol, pantothenyl ethyl benzoate, o-cymen-5-ol, cetylpyridium chloride, benzalkonium chloride, chlorhexidine dihydrochloride (2HCl), phenylphenol, chlorhexidine gluconate, chloroxylenol, chlorhexidine, laurylisoquinolinium bromide, thymol, triclocarban, chlorflucarban, hinokitiol, zinc pyrithione, iodide propynyl butylcarbamate, polyaminopropyl biguanide, etc. can be used.

[0047] As active ingredients, known substances such as moisturizers and / or cosmetic ingredients can be used. For example, plant extracts, sodium hyaluronate, panthenol, oligopeptides, sage leaf extract, aloe ferox leaf extract, succinoyl atelocollagen, deep sea water, Mimasaka hot spring water, marine cholesterol, hydrolyzed silk, etc., can be used.

[0048] Examples of plant extracts include shikonin extract, grape leaf extract, catechu extract, marshmallow extract, aloe extract, ginkgo extract, nettle extract, Artemisia capillaris extract, fennel extract, mallow extract, rosehip extract, scutellaria baicalensis extract, Phellodendron amurense extract, Coptis japonica extract, St. John's wort extract, seaweed extract, mugwort extract, chamomile extract, cinchona extract, cucumber extract, honeysuckle extract, Sophora flavescens extract, bamboo grass extract, gentian extract, Geranium thunbergii extract, burdock extract, comfrey extract, hawthorn extract, shiitake mushroom extract, Rehmannia glutinosa extract, perilla extract, linden extract, Houttuynia cordata extract, Sanguisorba officinalis extract, birch extract, horsetail extract, ivy extract, and yarrow. Extracts such as mulberry extract, jujube extract, thyme extract, tea extract, clove extract, calendula extract, angelica extract, spruce extract, tomato extract, elderberry extract, witch hazel extract, loquat leaf extract, coltsfoot extract, horse chestnut extract, meadowsweet extract, peach leaf extract, saxifrage extract, lavender extract, lemon extract, royal jelly extract, chestnut extract, rose extract (Centifolia rose flower extract), apple extract (apple fruit cell culture extract), Swertia japonica extract, Scots pine cone extract, chamomile flower extract, tea leaf extract, sachalinensis flower extract, ginseng root extract, brown algae extract, rosehip fruit extract, peach leaf extract, olive leaf extract, and rosemary extract can be used. These plant extracts may be used individually or in combination of two or more.

[0049] Applicator The applicator of the present invention is a pen-type applicator that contains the above-mentioned cosmetic.

[0050] In particular, the applicator of the present invention may have a tip section having an applicator and a shaft section having a storage section. The above-mentioned cosmetic is stored (filled) in this storage section.

[0051] The applicator of the present invention is not particularly limited as long as it is an applicator for cosmetics. In particular, the specific embodiment of the applicator described with reference to the drawings can be used as an eyeliner or eyebrow pencil. The applicator of the present invention may also be an eyeshadow, mascara, or the like.

[0052] The applicator of the present invention may be, for example, a rotary retractable type (Figure 1), a push-button retractable type (not shown), a cosmetic-containing type (Figure 2), or a collector type (Figure 3).

[0053] The following describes the various components of the applicator of the present invention.

[0054] 〈Tip section〉 The tip of the barrel has an application section. The tip of the barrel may be formed so that the cap can be attached and detached.

[0055] Furthermore, the tip section may have a core to assist in the supply of cosmetic material from the barrel section to the application section. This core may be composed of a capillary material such as a bundle of synthetic resin fibers, a bundle of natural fibers, or a porous resin body.

[0056] (Coated area) The applicator part may be in the form of a brush, a fiber bundle core, or other applicator body. In particular, when the applicator part is in the form of a brush or a fiber bundle core, the applicator of the present invention is useful as an eyeliner or eyebrow product.

[0057] If the coated portion is in the form of another coating body, the coated portion may be composed of, for example, rubber, elastomer, or a resilient closed-cell body.

[0058] If the application part is brush-shaped, it can be obtained by, for example, aligning (sharpening) multiple bundles of resin fibers to form a brush shape with a tapered tip, and then integrating the rear end by heat welding and expanding the diameter to form a flange.

[0059] If the coating portion is of the fiber bundle core type, the coating portion may be composed of fiber bundles or of a porous resin body.

[0060] The fibers constituting the coated portion may be synthetic fibers or natural fibers. The material of the synthetic fibers may be, for example, polybutylene terephthalate (PBT). The thickness of the fibers may be 0.10 mm or more, or 0.11 mm or more, and may be 0.15 mm or less, or 0.14 mm or less.

[0061] <Shaft cylinder part> The barrel section has a storage compartment. The above-mentioned cosmetic material is stored in this storage compartment.

[0062] (Detention area) The container may be hollow in shape, allowing for the filling of cosmetic, or it may be cotton in shape, allowing for the impregnation of cosmetic. When the container is hollow, the applicator may be referred to as a "direct liquid applicator." When the container is cotton in shape, the applicator may be referred to as a "cotton-filled applicator."

[0063] Furthermore, if the housing is hollow, an agitator may be housed within it. The agitator may be in the form of a ball, a rod, or the like. The agitator may also be made of metal or resin.

[0064] <cap> The cap is a component that covers the application area when not in use. The cap may have an inner cap and a spring. The inner cap is a cup-shaped component that is arranged to move back and forth in order to improve the airtightness of the application area. The spring is a component that biases the inner cap backward.

[0065] <Other configurations> For other optional components constituting the applicator of the present invention, refer to the following specific embodiment description. These components may be resin molded products.

[0066] The specific embodiments of the applicator will be described below with reference to the drawings. For optional configurations of the applicator of the present invention, please refer to the following description as appropriate.

[0067] Applicator of the first embodiment: Rotary dispensing type (Figure 1) As shown in Figure 1, the rotary-type dispenser 100 dispenses the cosmetic product of the present invention onto a brush-type applicator 111 by means of a liquid pressing mechanism 130. This configuration can be used as a direct-liquid eyeliner. In front of the liquid pressing mechanism 130 is a storage section 121 containing the cosmetic product, and the applicator 111 is positioned in front of it.

[0068] The liquid pressing mechanism 130 dispenses the cosmetic from the storage section 121 and supplies it to the application section 111 by rotating the dispensing member 131, which is disposed at the rear end of the shaft section 120, relative to the shaft section 120 in the circumferential direction.

[0069] The liquid pressing mechanism 130 of this applicator 100 includes a dispensing member 131, a threaded rod 132, a drive cylinder 133, a threaded body 134, and a piston body 135. The dispensing member 131 is rotatably fitted to the rear end of the shaft cylinder portion 120. The drive cylinder 133 can transmit the rotational force of the dispensing member 131 by the user to the threaded rod 132. The threaded body 134 is fixed to the shaft cylinder portion 120 and the threaded rod 132 is screwed into it. The tip of the threaded rod 132 is rotatably engaged with the piston body 135. The piston body slides within the housing portion 121 of the shaft cylinder portion 120. The rotation of the dispensing member 131 is transmitted to the threaded rod 132 via the drive cylinder 133. The rotation of the threaded rod 132 causes the threaded rod 132 and the piston body 135 to advance through the female thread of the nut-shaped threaded body 134, thereby discharging the cosmetic from the storage section 121 to the application section 111.

[0070] As shown in Figure 1, the extension member 131 is exposed in a state in which it is rotatably fitted into the rear end of the shaft cylinder portion 120. The cap 131a is fitted into the rear end, thereby giving the extension member 131 an operable closed cylindrical shape. The drive cylinder 133 is fitted into the extension member 131 and fixed in the rotational direction. A screw body 134 is mounted inside the drive cylinder 133, and the screw body 134 is fixed to the drive cylinder 133 in the rotational direction and is movable relative to the drive cylinder 133 in the axial direction. The spring member 131b can bias the extension member 131, which is a rotating body, toward the rear.

[0071] Furthermore, "fixed in the direction of rotation" means that when one component is attached to another component, that component is fixed so that it does not rotate relative to the other component.

[0072] In this applicator, a seal portion 113, a coupling member 114, a tip shaft portion 110, and an applicator portion 111 are fitted onto the front end portion 120a of the shaft cylinder portion 120. The housing portion 121 of the shaft body 120 contains the cosmetic material. The cosmetic material dispensed from the housing portion 121 passes through the flow path in the coupling member 114 and is discharged to the applicator portion 111 for application. After use, the cap 40 can be attached to the tip shaft portion 110 to cover the applicator portion 111 and the tip shaft portion 110.

[0073] Furthermore, as shown in Figure 1, the shaft portion 120 may have a stirring ball 122 inside the housing portion 121, which allows the cosmetic to be stirred by reciprocating motion. The cap 140 may also have an inner cap 141 provided inside it, and a spring 142 that can bias the inner cap 141 backward.

[0074] Furthermore, in order to close the flow path of the cosmetic material toward the application section 111 when not in use (during distribution), the applicator of the first embodiment may have a stopper 150 and a sealing ball 112.

[0075] The stopper 150 has a ring-shaped portion, and when not in use, this ring-shaped portion is positioned between the rear end of the front shaft portion 110 and the front surface of the stepped portion of the front end 120a of the shaft cylinder portion 120. The stopper 150 fixes the positions of the seal portion 113, the joint member 114, the front shaft portion 110, and the coating portion 111, making it possible to close the flow passage of cosmetic material toward the coating portion 111.

[0076] The stopper 150 may have a ring-shaped portion that is partially separated, with a tab integrally formed on the opposite side of the separated portion. When the tab is pulled, the ring-shaped portion expands from the separated portion, allowing it to be removed from between the rear end of the tip shaft portion 110 and the front end portion 120a of the shaft body 120.

[0077] When not in use, the sealing ball 112 is fitted into the inner diameter of the sealing portion 113, thereby preventing cosmetic material from flowing into the application portion 111.

[0078] During use, the user pulls the stopper 150 out of the shaft portion 120 and pushes the front shaft portion 110 toward the rear end, causing the narrow rear end portion of the joint member 114 to abut against the seal ball 112, disengaging the seal ball 112 from the inner diameter portion of the seal portion 113 and pushing it into the housing portion 121. This allows the cosmetic material in the housing portion 121 to flow from the inner diameter portion of the joint member 114 into the liquid flow path of the application portion 111, supplying it to the application portion 111 from within, and enabling application to the target area.

[0079] 《Applicator of the second embodiment: Cosmetic-integrated applicator type (Figure 2)》 The cosmetic-containing applicator type applicator 200, as shown in Figure 2, has a structure that supplies the cosmetic from inside the shaft portion 220 to the applicator portion 211. This applicator 200 has a shaft portion 220, a tip portion 210, an applicator portion 211, and a holding member 212. The shaft portion 220 contains the cosmetic by impregnation into a cotton-like storage portion 221. The applicator portion 211 is provided on the tip portion 210 and can apply the cosmetic to an object. The holding member 212 is a member that covers the outer circumference of the applicator portion 211 on the shaft portion 220 side (base side), leaving the tip portion 211a of the applicator portion 211 exposed. This applicator 200 may have a cap 240 that is detachably configured on the tip portion 210, which can cover the applicator portion 211 and the holding member 212.

[0080] The padded housing portion 221 is housed from the central part of the shaft barrel portion 220 to the front shaft portion 210, and is sealed and supported by the tail plug 222 which is fitted from the rear end of the shaft barrel portion 220.

[0081] A core 213 is positioned in the opening of the front barrel portion 210. This core may be made of an open-cell material. The tail end of this core 213 is fitted into the tip of the housing portion 221. On the other hand, the tip of this core 213 is fitted into the tail end of the coating portion 211, thereby guiding the ink stored in the housing portion 221 to the coating portion 211. The front barrel portion 210 is slightly smaller in diameter than the barrel portion 220 (smaller by the thickness of the cap 240), creating a step between them. The core 213 is mounted inside the front barrel portion 210 via a roughly cylindrical support 214. The cylindrical rear end of the retaining member 212 is fitted between the outer circumference of the support 214 and the inner circumference of the front barrel portion 210.

[0082] The tip of the holding member 212 is located further forward than the front shaft portion 210 and covers the outer circumferential surface 211b of the coating portion 211. The outer circumferential surface 212a of the holding member 212 is conical in shape or tapered.

[0083] 《Third embodiment of the applicator: Collector-type applicator (Figure 3)》 As shown in Figure 3(b), the collector-type applicator 300 has a collector 312 positioned at the front of the shaft portion 320, and a housing portion 321 housed within the shaft portion 320. The collector 312 has a shape in which multiple leaf portions are arranged axially in a comb-like manner. As shown in Figure 3(a), the front shaft portion 310 and the shaft portion 320 on the rear side of the front shaft portion 310 are fitted together.

[0084] The shaft section 320 is formed in a pipe shape with an internal connection and openings at the front and rear. A tail plug 323 is fitted to the rear of the shaft section 320, thereby closing the rear of the shaft section 320. As a result, the shaft section 320, sandwiched between the front end of the tail plug 323 and the rear end of the collector 312, forms the housing section 321.

[0085] No impregnating material such as cotton is placed inside this storage section 321; the cosmetic is directly contained within it, and a stirring element (such as a ball) 322 for stirring the cosmetic is also placed inside.

[0086] The collector 312 has a structure in which it is covered and held by the front shaft portion 310 and the barrel portion 320.

[0087] A brush-shaped applicator 311, which has a tapered shape, protrudes from the opening at the front end of the tip section 310. The tip section 310 is formed to be tapered with a roughly conical side shape, and the tip angle of the tip section 310 may be formed to be approximately the same angle as the tip angle of the applicator 311.

[0088] A cap can be detachably fitted onto the tip portion 310, thereby covering the application portion 311.

[0089] Inside the hollow, tapered tip section 310, a bellows-shaped collector 312 is positioned behind the coating section 311, and a core 313 is positioned through the hollow portion of this collector 312.

[0090] The core 313 does not protrude from the rear end of the collector 312 into the housing portion 321 of the shaft cylinder portion 320 (see Figure 3(b)). The rear end surface of the collector 312 and the rear end surface of the core 313 are on substantially the same plane, and as a result, the rear end of the core 313 does not protrude into the housing portion 321. This ensures that the volume within the housing portion 321 is maintained. Furthermore, when the stirring body 322 is placed in the housing portion 321, the stirring body 322 will not collide with the core 313 even if it moves within the housing portion 321. This suppresses deformation of the core 313, and as a result, sufficient penetration of the coating liquid is achieved. [Examples]

[0091] The present invention will be specifically described by examples and comparative examples, but the present invention is not limited thereto.

[0092] Preparation of water-based liquid cosmetics The materials shown in Table 1 were added in the amounts shown in Table 1 and stirred using a disperser. The mixture was then dispersed using zirconia beads (Φ0.3 mm) in a paint shaker for 30 minutes in a horizontal bead mill disperser to prepare the aqueous liquid cosmetic compositions of Examples 1-8 and Comparative Examples 1-3. Details of the components shown in Table 1 are as follows. Binchotan charcoal: CHARCOPOWDER, Daito Chemical Industries Co., Ltd. Bamboo charcoal: BCP Super, Chem-spec Activator A: Polyglyceryl myristate-10, NIKKOL Decaglyn 1-MVEX PN, Nikko Chemicals Co., Ltd., HLB: 14.5 Activator B: Polyglyceryl laurate-10, NIKKOL Decaglyn 1-LVEX, Nikko Chemicals Co., Ltd., HLB: 15.5 Activating agent C: Sorbitan laurate, NIKKOL SL-10, Nikko Chemicals Co., Ltd., HLB: 8.5 Activator D: Polyoxyethylene behenyl ether, NIKKOL BB-30, Nikko Chemicals Co., Ltd., HLB: 18 Activating agent E: Polysorbate 80 NIKKOL TO-10V, Nikko Chemicals Co., Ltd., HLB: 15 Activator F: Sorbitan sesquiisostearate, NIKKOL SI-15RV, Nikko Chemicals Co., Ltd., HLB: 4.5 Acrylic dispersant: Acrylates copolymer ammonium SYNTRAN 5402, Interpolymer, Active ingredient: 21.3% Film-forming agent: Acrylates copolymer, styrene-acrylates copolymer ammonium, active ingredient 42% Preservative: Sodium dehydroacetate Water: Purified water

[0093] "evaluation" <viscosity> For each of the obtained aqueous liquid cosmetic compositions, a shear rate of 191.5 s was measured at a temperature of 25°C using a cone-plate viscometer (TV-30 type viscometer, ELD type viscometer, standard cone plate, manufactured by Tokimec Co., Ltd.). -1 The viscosity was measured.

[0094] Each of the obtained aqueous liquid cosmetic compositions was filled into an applicator having a brush-type applicator, as shown in Figure 1, and evaluated as follows. The brush heads used in each of the examples in Figure 1 are tapered brush bodies (brush heads) made of bundles of polybutylene terephthalate resin fibers with a diameter of φ0.05 to 0.3 mm.

[0095] <Upper and lower density difference> Aqueous liquid cosmetic was applied to the skin, and the appearance of the drawn lines was recorded. The applicator was then fixed in an upward position and left to stand for one week at 25°C and 50°C. Subsequently, the aqueous liquid cosmetic was applied to the skin again, and the drawn lines were visually observed for sensory evaluation. The evaluation criteria were as follows: A: Compared to the state before being placed upright, the difference in shade remained unchanged. B: There was a slight difference in shade compared to the state before it was placed upright and still. C: There was a slight difference in shade compared to the state before it was placed upright and still. D: There was a significant difference in shade compared to the state before being placed upright and still.

[0096] <Water-resistant adhesion> The applicator was shaken five times, and the aqueous liquid cosmetic was applied once to the skin. The drawn lines were left at room temperature for 30 minutes. After that, the drawn lines were rinsed with water for 30 seconds, and then rubbed 10 times with the pad of the index finger. The drawn lines were then visually observed and evaluated. The evaluation criteria are as follows: A: Compared to the initial version, the line work was maintained. B: Compared to the initial version, the lines had peeled off slightly. C: Compared to the initial version, the lines were slightly peeling off. D: Compared to the initial version, the lines had peeled off and disappeared.

[0097] <Sebum adhesion resistance> The applicator was shaken five times, and the aqueous liquid cosmetic was applied once to the skin. The drawn lines were then left at room temperature for 30 minutes. After that, artificial sebum was dropped onto the drawn lines, and the lines were rubbed 10 times with the pad of the index finger. The drawn lines were then visually observed and evaluated. The evaluation criteria are as follows: A: Compared to the initial version, the line work was maintained. B: Compared to the initial version, the lines had peeled off slightly. C: Compared to the initial version, the lines were slightly peeling off. D: Compared to the initial version, the lines had peeled off and disappeared.

[0098] <Non-drying properties> The pen was left for 10 minutes with the cap removed. Afterward, straight lines were drawn on the skin, and any smudging at the start of the stroke was visually inspected. The evaluation criteria were as follows: A: The fresh lines were excellent. B: Although there was a slight decrease in ink flow, I was able to write without any smudging. C: A decrease in flow rate was observed, and friction was occurring. D: It was smudged and I couldn't write on it.

[0099] <Color development> After thoroughly stirring the contents, the mixture was applied to white coated paper (Catherine, Tokushu Tokai Paper Co., Ltd.) using a bar coater (No. 6). Next, the lightness L of the coating film was measured using a spectrophotometer (SC-P, Suga Test Instruments Co., Ltd.). * The value was measured.

[0100] Table 1 shows the configurations and evaluation results of the examples and comparative examples.

[0101] [Table 1]

[0102] Table 1 shows that the aqueous liquid cosmetic composition of the examples, while containing plant-derived carbon particles, exhibits good water adhesion resistance, sebum resistance, stability of vertical concentration over time, and non-drying properties when the pen tip is exposed.

[0103] Furthermore, regarding color development, the aqueous liquid cosmetic composition of the example was somewhat inferior to Comparative Example 3, which contained 25% by mass of plant-derived carbon particles, but it was still perfectly usable. [Explanation of Symbols]

[0104] 100, 200, 300 Applicator 110, 210, 310 Tip shaft part 111, 211, 311 Application area 112 Seal Ball 113 Seal part 114 Joint Members 120, 220, 320 Shaft cylinder part 120a Front end of the shaft section 121, 221, 321 storage units 122 Mixing ball 130 Liquid pressure mechanism 131. Dispensing member 131a Crown of Heaven 131b Spring member 132 Threaded rod 133 Drive cylinder 134 Screw body 135 Piston body 140, 240 caps 141 Inner Cap 142 Springs 150 Stopper 211a Tip of the coating section 211b Outer surface of the coated area 212 Retaining member 212a Outer peripheral surface of the retaining member 213 Core 214 Support 222 tail plug 312 Collectors 313 Core 322 Stirring body 323 tail plug

Claims

1. A water-based liquid cosmetic, It contains at least water, plant-derived carbon particles, a film-forming agent, and a surfactant. The content of the plant-derived carbon particles is less than 22% by mass relative to the mass of the aqueous liquid cosmetic composition. The ratio of the mass of the plant-derived carbon particles to the mass of the surfactant is 10 to 200, and 25℃, shear rate 191.5s －１ The viscosity measured is 10 mPa·s or less. Water-based liquid cosmetic.

2. The aqueous liquid cosmetic composition according to claim 1, wherein the HLB value of the surfactant is 8.0 or higher.

3. An applicator having the aqueous liquid cosmetic composition described in claim 1 or 2.

4. The applicator according to claim 3, having a brush-type or fiber bundle core-type applicator.

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