Liquid cosmetic and applicator

Abstract

To provide a liquid cosmetic and an applicator which have excellent sedimentation suppression and redispersibility of a luster pigment, and is hard to lose luster feel of a drawing line.SOLUTION: A liquid cosmetic contains: a luster pigment; clay mineral particles; a first copolymer which contains at least one kind selected from acrylic acid, methacrylic acid, acrylic acid ester and methacrylic acid ester as a monomer unit; a second copolymer which contains at least one kind selected from maleic acid, maleic acid anhydride, maleic acid ester and a derivative thereof, and at least one kind selected from alkyl vinyl ether, vinyl alcohol, α-olefin, styrene and styrene derivative as a monomer unit; hexylene glycol; and water.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to liquid cosmetics and applicators. [Background technology]

[0002] BACKGROUND ART Liquid cosmetics (such as eyeliners) are used to form lustrous lines on the surface of the skin or the like by applying them with an applicator or the like.

[0003] Patent Document 1 discloses a liquid cosmetic composition containing a plate-like pigment coated with a compound such as cellulose, layered clay mineral particles, an acrylic copolymer, and water. By including these components in the liquid cosmetic composition, it is possible to obtain a clear, lustrous coating film without the plate-like pigment overlapping when applied to a surface such as the skin.

[0004] Patent Document 2 discloses an aqueous liquid cosmetic containing sodium polyaspartate, glittering powder, a water-soluble dispersant, and a metal oxide. By including these ingredients in the aqueous liquid cosmetic, it is possible to obtain a liquid cosmetic that is excellent in storage stability, with the glittering powder being less likely to settle, and that has excellent re-dispersibility of settled glittering powder, and that can be sufficiently dispensed even in a pen-type form. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-14412 [Patent Document 2] Japanese Patent Publication No. 2020-132619 Summary of the Invention [Problem to be solved by the invention]

[0006] Conventional liquid cosmetics containing glittering pigments, such as those disclosed in Patent Documents 1 and 2, leave room for improvement in terms of preventing settling of the glittering pigment during storage and redispersing the glittering pigment when reused. Furthermore, conventional liquid cosmetics containing glittering pigments require a relatively long time for the coating film to dry after application, and so if the coating film is touched by a finger or other object while drying, the glittering pigment contained in the coating film is likely to peel off along with the liquid components, and the glittering feel of the lines formed on the skin surface is likely to be impaired.

[0007] In view of the above circumstances, at least one embodiment of the present invention aims to provide a liquid cosmetic and an applicator that are excellent in suppressing sedimentation and redispersibility of glitter pigments, and that are less likely to impair the glitter of drawn lines. [Means for solving the problem]

[0008] The liquid cosmetic according to at least one embodiment of the present invention comprises: A photoluminescent pigment; Clay mineral particles; a first copolymer containing, as a monomer unit, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester; a second copolymer containing, as monomer units, at least one selected from maleic acid, maleic anhydride, maleic esters, and derivatives thereof, and at least one selected from alkyl vinyl ethers, vinyl alcohol, α-olefins, styrene, and styrene derivatives; hexylene glycol, Water and Contains:

[0009] Moreover, an applicator according to at least one embodiment of the present invention comprises: An application unit; a liquid storage section that stores the liquid cosmetic material, The liquid cosmetic is configured to be supplied from the liquid storage section to the application section. [Effects of the Invention]

[0010] According to at least one embodiment of the present invention, a liquid cosmetic and an applicator are provided that are excellent in suppressing sedimentation and redispersibility of the glitter pigment, and that are less likely to impair the glitter of the drawn lines. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a longitudinal cross-sectional view of an applicator according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, several embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present invention.

[0013] (Composition of liquid cosmetics) The liquid cosmetic according to some embodiments is a liquid cosmetic that can be used as, for example, eyeliner, eyebrow cream, concealer, foundation, nail enamel, lip color, etc., and can be applied to human skin, etc., using, for example, an applicator described below.

[0014] A liquid cosmetic according to some embodiments contains a luster pigment, clay mineral particles, a first copolymer, a second copolymer, hexylene glycol, and water. The first copolymer contains, as a monomer unit, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester. The second copolymer contains, as a monomer unit, at least one selected from maleic acid, maleic anhydride, a maleic acid ester, and derivatives thereof, and at least one selected from alkyl vinyl ether, vinyl alcohol, α-olefin, styrene, and styrene derivatives.

[0015] The clay mineral particles are layered (plate-like) particles, and include silicate minerals such as bentonite or smectite. When these clay mineral particles are dispersed in water and allowed to stand, the negatively charged layer faces and the positively charged end faces attract each other, forming a house-of-cards structure, which is a three-dimensional association structure of layer face-end face bonds.

[0016] The above-mentioned glittering pigment is a hydrophobic particle having a plate-like shape that imparts glittering to a liquid cosmetic. If there is nothing between the glittering pigment particles, these particles tend to adhere to each other face-to-face, becoming hard and difficult to dissolve. Furthermore, when the glittering pigment is dispersed in water, the particles tend to adhere to each other more firmly due to the hydrophobic interaction between the glittering pigment particles.

[0017] In this regard, because the liquid cosmetic according to the above-described embodiment contains clay mineral particles, a three-dimensional house-of-cards structure of the clay mineral particles is formed within the liquid cosmetic, and the glittering pigment is trapped within this house-of-cards structure, which inhibits settling of the glittering pigment and inhibits adhesion and aggregation between glittering pigments due to hydrophobic interactions, resulting in good redispersibility of the glittering pigment in the liquid cosmetic.

[0018] Furthermore, the liquid cosmetic preparation according to the above-described embodiment includes a first copolymer (acrylic copolymer) containing, as monomer units, at least one selected from acrylic acid, methacrylic acid, acrylic esters, and methacrylic esters, and a second copolymer (maleic acid copolymer) containing, as monomer units, at least one selected from maleic acid, maleic anhydride, maleic esters, and derivatives thereof, and at least one selected from alkyl vinyl ethers, vinyl alcohol, α-olefins, styrene, and styrene derivatives. Therefore, the three-dimensional structure of the first and second copolymers effectively inhibits adhesion and aggregation between the bright pigments due to hydrophobic interactions. This further inhibits settling and improves redispersibility of the bright pigments.

[0019] Furthermore, because the liquid cosmetic preparation according to the above-described embodiment contains the above-described first copolymer, second copolymer, and hexylene glycol, a three-dimensional structure is formed by hydrogen bonds between the carboxyl groups or carbonyl groups of the first copolymer and the second copolymer and the hydroxyl groups of the hexylene glycol. This three-dimensional structure effectively prevents adhesion and aggregation between the bright pigments due to hydrophobic interactions. This further improves the prevention of sedimentation and redispersibility of the bright pigment.

[0020] Furthermore, since the liquid cosmetic preparation according to the above-described embodiment contains the above-described first copolymer, second copolymer, and hexylene glycol, a complex of these components is formed in water due to the interaction (hydrophobic bond) between the hydrophobic groups of the first copolymer, second copolymer, and hexylene glycol. This complex penetrates between the bright pigments, effectively suppressing adhesion and aggregation due to hydrophobic interactions between the bright pigments. This results in better suppression of sedimentation and redispersibility of the bright pigments.

[0021] Furthermore, because the liquid cosmetic preparation according to the above-described embodiment contains the above-described first copolymer, second copolymer, and hexylene glycol, the hydrophobic groups of the first copolymer, second copolymer, and hexylene glycol in water are easily adsorbed to the bright pigment due to hydrophobic interactions with the bright pigment, thereby effectively suppressing adhesion and aggregation between bright pigments due to hydrophobic interactions, thereby further suppressing sedimentation and improving redispersibility of the bright pigment.

[0022] Furthermore, because the liquid cosmetic preparation according to the above-described embodiment contains the first and second copolymers described above, the house-of-cards structure formed by the clay mineral particles is reinforced by the charges of the alkyl, carboxy, or carbonyl groups of the first and second copolymers. That is, even if the house-of-cards structure of the clay mineral particles attempts to collapse, the charges of the functional groups described above of the first and second copolymers (positive charges of the alkyl groups and negative charges of the carboxy or carbonyl groups) interact with the surface charges (negative charges) of the clay mineral particles, thereby tending to maintain the house-of-cards structure of the clay mineral particles. This effectively inhibits settling of the luster pigment and improves the redispersibility of the luster pigment.

[0023] Furthermore, since the liquid cosmetic according to the above embodiment contains the second copolymer, the maleic acid portion of the second copolymer is soluble in a divalent cation (Ca 2+ The chelating and stabilizing effect of the acrylate acrylate on the cations present between the layers of the clay mineral particles and the positive charges at the ends of the clay mineral particles acts on the cations present between the layers of the clay mineral particles and the positive charges at the ends of the clay mineral particles, making it easier for the glittering pigment to bond with the clay mineral particles and more firmly maintaining the house-of-card structure of the clay mineral particles that have incorporated the glittering pigment.As a result, sedimentation of the glittering pigment is more effectively suppressed, and adhesion and aggregation due to hydrophobic interactions between the glittering pigments is more effectively suppressed, resulting in better redispersibility of the glittering pigment in liquid cosmetics.

[0024] Furthermore, since the liquid cosmetic according to the above-described embodiment contains hexylene glycol, it is possible to impart excellent drying properties to the liquid cosmetic. As a result, the lines drawn by applying the liquid cosmetic can be dried in a short time, and peeling of the pigment during drying can be suppressed. As a result, the brilliance of the lines drawn by the liquid cosmetic is less likely to be impaired.

[0025] Furthermore, the liquid cosmetic according to the above-described embodiment contains hexylene glycol, which, as described above, contributes to inhibiting the settling of the glitter pigment in the liquid cosmetic. This allows for a reduction in the content of thickeners, such as polysaccharides, used to inhibit the settling of the glitter pigment, and accordingly reduces the viscosity of the liquid cosmetic. This allows for a thinner coating thickness of the liquid cosmetic, which improves the quick-drying properties of the coating and prevents the glitter of the lines drawn by the liquid cosmetic from being lost.

[0026] Furthermore, because the liquid cosmetic according to the above-described embodiment contains the second copolymer, the liquid cosmetic film has good affinity to the skin, and the second copolymer is adsorbed to the glittering pigment through hydrophobic interactions, improving the affinity of the glittering pigment to the skin. As a result, the liquid cosmetic film and the glittering pigment are quickly adsorbed to and fixed on the skin, making them less likely to peel off, and as a result, the glittering of the lines drawn with the liquid cosmetic is less likely to be impaired.

[0027] As described above, according to the above-described embodiment, it is possible to obtain a liquid cosmetic that is excellent in suppressing sedimentation and redispersibility of the glitter pigment, and that is less likely to impair the glitter of the drawn lines.

[0028] Here, the redispersibility of the glittering pigment in this specification refers to the degree of dispersion of the glittering pigment when it is redispersed. After the glittering pigment is dispersed in a liquid by using a liquid cosmetic or the like, the glittering pigment settles when the liquid cosmetic is left to stand during storage, and when the liquid cosmetic is reused, the glittering pigment is redispersed in the liquid by shaking the container containing the liquid cosmetic, for example.

[0029] The above-mentioned luster pigment is a plate-shaped pigment having luster, and may include, for example, an aluminum pigment, a glass flake pigment, a pearl pigment, a glass powder coated with a metal or metal oxide, or a resin film powder coated with a metal.

[0030] Examples of commercially available products that can be used as the above-mentioned brilliant pigments include aluminum pigments such as Cosmicolor Celeste Rose Pink, Cosmicolor Celeste Iris Blue, Cosmicolor Celeste Morpho Blue, Cosmicolor Celeste Tecla Green, Cosmicolor Celeste Aqua Green, Cosmicolor Celeste Meadow Gold, Cosmicolor Celeste Ivy Orange, Cosmicolor Celeste Cherry Pink, Cosmicolor Celeste Maple Red, Cosmicolor Stratone Honey Pink, Cosmicolor Stratone Pale Gold, Cosmicolor Stratone Solar Gold, Cosmicolor Flourish Yellow DC, Cosmicolor Flourish Orange SP, Cosmicolor Metallics Velvet Silver, Cosmicolor Metallics Frost Silver, and Cosmicolor Metallics Crystal Silver (all manufactured by Toyo Aluminum Co., Ltd.); Examples of suitable pigments include glass flake pigments such as PEARL-GFIF VIOLET, DK PEARL-GFIF BLUE, and DK PEARL-GFIF GREEN (all manufactured by Daito Kasei Kogyo Co., Ltd.), and pearl pigments such as FANTASPEARL 0015SR, FANTASPEARL 0525SR, FANTASPEARL 1060SR, FANTASPEARL 1060YR, FANTASPEARL 1060RYR, FANTASPEARL 1060RBR, FANTASPEARL 1060BR, and FANTASPEARL 1060GR (all manufactured by Nihon Koken Kogyo Co., Ltd.).

[0031] Average particle size of the glitter pigment r Pmay be 10 μm or more and 150 μm or less. When the average particle size of the luster pigment is 10 μm or more, the luster pigment is somewhat larger than the clay mineral particles, etc. Therefore, the luster pigment is less likely to settle out of the house-of-card structure of the clay mineral particles or the three-dimensional structure of the first copolymer, second copolymer, and hexylene glycol, and the luster pigment is more likely to achieve a sense of brilliance. When the average particle size of the luster pigment is 150 μm or less, the weight per particle of the luster pigment is not too large. Therefore, the luster pigment particles are more likely to be incorporated into the house-of-card structure of the clay mineral particles and the three-dimensional structure of the first copolymer, second copolymer, and hexylene glycol. Therefore, sedimentation of the luster pigment in the liquid cosmetic is more likely to be suppressed, and the luster pigment is more likely to be redispersed well.

[0032] The content of the glittering pigment in the liquid cosmetic may be 0.5% by mass or more and 10.0% by mass or less. If the content of the glittering pigment is 0.5% by mass or more, the glittering pigment of the liquid cosmetic is likely to have sufficient glittering. If the content of the glittering pigment is 10.0% by mass or less, the glittering pigment is unlikely to form a hard cake in the liquid cosmetic, and the liquid cosmetic is likely to have good application properties.

[0033] In some embodiments, the bright pigment may be an aluminum pigment containing aluminum. The aluminum-containing bright pigment may have a surface that has been subjected to a hydrophobic treatment to make it less soluble in water.

[0034] When the liquid cosmetic contains an aluminum pigment (aluminum-containing luster pigment), the interaction between the hydrophobic surface of the aluminum pigment and the maleic acid constituting the second copolymer facilitates the incorporation of the aluminum pigment into the three-dimensional structure of the second copolymer. This effectively inhibits adhesion and aggregation between aluminum pigments due to hydrophobic interactions. Furthermore, the maleic acid portion of the second copolymer surrounds the aluminum through a chelating action, more effectively inhibiting adhesion and aggregation between aluminum-containing luster pigments. This results in better sedimentation inhibition and redispersibility of the luster pigment.

[0035] The clay mineral particles are particles having a layered (plate-like) shape, and include silicate minerals such as bentonite, smectite, montmorillonite, beidellite, saponite, stevensite, and hectorite.

[0036] Examples of commercially available products that can be used as the above-mentioned clay mineral particles include bentonites such as Kunipia-F, Kunipia-G, Kunipia-G4, Kunipia-G10, and Moistnite-S (all manufactured by Kunimine Kogyo Co., Ltd.), and synthetic smectites such as Sumecton-SA, Sumecton-SWN, and Sumecton-SWF (all manufactured by Kunimine Kogyo Co., Ltd.).

[0037] Average particle size of clay mineral particles r C may be 0.250 μm or more and 0.550 μm or less. When the average particle size of the clay mineral particles is 0.250 μm or more and 0.550 μm or less, the luster pigment is less likely to settle out of the three-dimensional structure of the house-of-cards structure of the clay mineral particles, and the luster pigment particles are more likely to be incorporated into the house-of-cards structure of the clay mineral particles. Therefore, sedimentation of the luster pigment in the liquid cosmetic is more likely to be suppressed, and the luster pigment is more likely to be redispersed well.

[0038] The content of clay mineral particles in the liquid cosmetic may be 0.1% by mass or more and 1.0% by mass or less. If the content of clay mineral particles is 0.1% by mass or more, a relatively large number of glittering pigment particles can be incorporated into the house-of-card structure formed by the clay mineral particles, making it easier to prevent the glittering pigment from settling in the liquid cosmetic. If the content of clay mineral particles is 1.0% by mass or less, the glittering effect of the liquid cosmetic due to the glittering pigment is less likely to be impaired by the clay mineral particles.

[0039] The average particle diameter r of the above-mentioned bright pigment P Average particle size r of clay mineral particles C The ratio of r C / r P However, it may be 0.0016 or more and 0.055 or less.

[0040] The above ratio r C / r P If the ratio r is 0.0016 or more, the size of the clay mineral particles is somewhat larger than that of the bright pigment. Therefore, the bright pigment is less likely to settle out of the house-of-cards structure of the clay mineral particles. C / r P If the weight per particle of the luster pigment is 0.055 or less, the weight per particle of the luster pigment is not too large relative to the clay mineral particles. This allows the luster pigment particles to be easily incorporated into the three-dimensional structure of the house-of-cards structure of the clay mineral particles. This makes it easier to prevent the luster pigment from settling in the liquid cosmetic and also makes it easier to redisperse the luster pigment.

[0041] The average particle size of the bright pigment in this specification is a value measured by photographing the bright pigment using a digital microscope VHX7100 (manufactured by Keyence Corporation), measuring the long diameters (the distance between the two most distant points on the outline of the pigment) of 200 randomly selected particles, and calculating the average of the long diameters. The average particle size of the clay mineral particles in this specification is a value measured by photographing the clay mineral particles using a scanning electron microscope JSM-6510LA (manufactured by JEOL Ltd.), measuring the long diameters of 200 randomly selected particles, and calculating the average of the long diameters.

[0042] The first copolymer is a copolymer (acrylic copolymer) containing at least one monomer unit selected from acrylic acid, methacrylic acid, acrylic acid esters, and methacrylic acid esters.

[0043] The above-mentioned first copolymer is available, for example, in the form of an emulsion containing emulsion particles of the first copolymer.

[0044] The content of the first copolymer in the liquid cosmetic (content as solid content) may be 2% by mass or more and 30% by mass or less.

[0045] If the content of the first copolymer is 2% by weight or more, the three-dimensional structure of the first copolymer is likely to have the effect of suppressing adhesion and aggregation of the glittering pigments due to hydrophobic interactions between them. Furthermore, if the content of the first copolymer is 2% by weight or more, the viscosity of the liquid cosmetic does not become too low, and excessive ejection of the liquid cosmetic is suppressed, for example, when using an applicator described below. If the content of the first copolymer is 30% by weight or less, the viscosity of the liquid cosmetic does not become too high, and the liquid cosmetic is likely to be ejected appropriately, for example, when using an applicator described below.

[0046] The first copolymer may be a copolymer containing, as monomer units, two or more selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester.

[0047] Alternatively, the first copolymer may be a styrene-acrylic copolymer containing, as monomer units, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester, and styrene.

[0048] In this case, since the liquid cosmetic contains a first copolymer that is a styrene-acrylic copolymer, the three-dimensional structure of the first copolymer containing styrene groups can more effectively suppress adhesion and aggregation due to hydrophobic interactions between the glitter pigments. This improves the prevention of sedimentation and redispersion of the glitter pigment. Furthermore, the alkyl, carboxy, or carbonyl groups of the first copolymer, as well as the charge of the styrene groups, more effectively reinforce the house-of-card structure formed by the clay mineral particles. This improves the prevention of sedimentation of the glitter pigment and improves redispersion of the glitter pigment.

[0049] Examples of commercially available products that can be used as the first copolymer include styrene / acrylate copolymers such as DAITOSOL 5000STY (manufactured by Daito Chemical Industry Co., Ltd.), Yodozol GH41F, Yodozol GH952 (all manufactured by Nouryon Japan Co., Ltd.), Vinisol 1012JC, Vinisol 1013JH, and Vinisol 1019CT (all manufactured by Daido Chemical Industry Co., Ltd.), acrylates / alkyl acrylate copolymers such as DAITOSO 5000SJ, DAITOSO 4000SJT, DAITOSOL 5500GM, and DAITOSOL 5000PO (all manufactured by Daito Chemical Industry Co., Ltd.), and DAITOSOL 5000AD, DAITOSOL 3000SLPN-PE1, DAITOSOL Examples of suitable acrylate copolymers include 3000VP3 (manufactured by Daito Kasei Kogyo Co., Ltd.), Yodozole GH34F, Yodozole GH800F, Yodozole GH800PE, Yodozole GH810F, Yodozole GH256F, and DERMACRYL AQF (manufactured by Nouryon Japan Co., Ltd.).

[0050] The second copolymer described above is a copolymer (maleic acid-based copolymer) containing, as monomer units, at least one selected from maleic acid, maleic anhydride, maleic esters and derivatives thereof, and at least one selected from alkyl vinyl ethers, vinyl alcohol, α-olefins, styrene and styrene derivatives.

[0051] The second copolymer described above is available, for example, in the form of an emulsion containing emulsion particles of the second copolymer, or in the form of a powder.

[0052] The content of the second copolymer in the liquid cosmetic (content as solid content) may be 0.03% by mass or more and 2.0% by mass or less.

[0053] When the content of the second copolymer in the liquid cosmetic is 0.03% by mass or more, the effects of inhibiting sedimentation of the glittering pigment and improving redispersibility due to the three-dimensional structure, hydrogen bonds, hydrophobic bonds, charge action, and chelating action formed by the second copolymer are likely to be obtained, and the effects of improving the adhesion of the liquid cosmetic coating film and glittering particles to the skin are likely to be obtained.Furthermore, when the content of the second copolymer in the liquid cosmetic is 2.0% by mass or less, the effect of hexylene glycol in improving quick-drying properties is unlikely to be inhibited.

[0054] The second copolymer may be a copolymer containing, as monomer units, at least one selected from maleic acid, maleic anhydride, and maleic acid ester, and methyl vinyl ether.

[0055] In this case, the second copolymer (maleic acid-based copolymer) is formed from methyl vinyl ether, which is relatively easy to obtain, so the liquid cosmetic according to the embodiment can be obtained relatively easily.

[0056] Examples of the second copolymer include (C30-38 olefin / isopropyl maleate / maleic acid) copolymer, (isobutylene / sodium maleate) copolymer, (isobutylene / ethyl maleate / hydroxyethyl maleate) copolymer, (ethylene / maleic acid) copolymer, (ethylene / maleic anhydride / propylene) copolymer, (vinyl buteth-25 / sodium maleate) copolymer, (vinyl methyl ether / ethyl maleate) copolymer, (vinyl methyl ether / butyl maleate) copolymer, (maleic acid / diisobutylene) sodium copolymer, (maleic acid / vinyl alcohol) sodium copolymer, (methyl vinyl ether / maleic acid) crosspolymer, (methyl vinyl ether / maleic acid) copolymer, methoxy PEG-16 sodium maleate / styrene sulfonic acid) copolymer, or (Lanes-40 sodium maleate / styrene sulfonic acid) copolymer.

[0057] Examples of the second copolymer containing at least one selected from the above-mentioned maleic acid, maleic anhydride, and maleic ester, and methyl vinyl ether as monomer units include (methyl vinyl ether / maleic anhydride) copolymers (formula (A) below) such as GANTREZ AN-119, GANTREZ AN-139, and GANTREZ AN-169 (all manufactured by Ashland Japan Co., Ltd.); GANTREZ S-96 BF SOLUTION ST POLYMER; Examples of the copolymer include methyl vinyl ether / maleic acid copolymers (formula (B) below) such as GANTREZ S-97 and GANTREZ S-97 BF POLYMER (all manufactured by Ashland Japan Co., Ltd.); methyl vinyl ether / alkyl maleate copolymers (formula (C) below; where R is an alkyl group such as an ethyl group, an isopropyl group, or a butyl group) such as GANTREZ A-425, GANTREZ ES-225, GANTREZ ES-335, GANTREZ ES-425, GANTREZ ES-435, and GANTREZ SP-215 (all manufactured by Ashland Japan Co., Ltd.); and methyl vinyl ether / maleate copolymers such as GANTREZ MS-955 POLYMER (formula (D) below) (all manufactured by Ashland Japan Co., Ltd.).

[0058] [ka] [ka] [ka] [ka]

[0059] The above-mentioned hexylene glycol (also known as 2-methylpentane-2,4-diol) is a diol having six carbon atoms.

[0060] Hexylene glycol has two hydroxyl groups relative to its six carbon atoms, meaning the ratio of hydroxyl groups to the carbon atoms is not too high. This results in good drying properties for liquid cosmetics. On the other hand, hexylene glycol has six carbon atoms, so its carbon chain is not too long. This results in good solubility in water and less phase separation in liquid cosmetics. Hexylene glycol also has a three-dimensional structure with side chains (methyl groups). This three-dimensional structure allows the incorporation of a photoluminescent pigment, thereby preventing the sedimentation of the photoluminescent pigment. Furthermore, hexylene glycol has hydroxyl groups near the center of its structure (the second and fourth carbons). Therefore, compared to other diols with the same number of carbon atoms (e.g., 1,2-hexanediol), it is less likely to retain water through hydrogen bonding, which allows it to impart good drying properties to liquid cosmetics.

[0061] The content of hexylene glycol in the liquid cosmetic may be 1.0% by mass or more and 4.0% by mass or less.

[0062] When the content of hexylene glycol in the liquid cosmetic is 1.0% by mass or more, the above-mentioned effects of hexylene glycol in inhibiting sedimentation and redispersing the glitter pigment can be achieved, and the drying properties of the liquid cosmetic can be improved. Furthermore, when the content of hexylene glycol in the liquid cosmetic is 4.0% by mass or less, the viscosity of the liquid cosmetic is not too high, allowing the coating thickness of the liquid cosmetic to be thin. This tends to improve the quick-drying properties of the coating film, and the glitter of the lines drawn by the liquid cosmetic is less likely to be lost. Therefore, by setting the content of hexylene glycol in the liquid cosmetic to 1.0% by mass or more and 4.0% by mass or less, a liquid cosmetic that is excellent in inhibiting sedimentation and redispersing the glitter pigment and that is less likely to lose the glitter of the lines drawn can be obtained.

[0063] The water contained in the liquid cosmetic preparation is the main component and main solvent of the liquid cosmetic preparation. The water may be ion-exchanged water, purified water, pure water, or ultrapure water.

[0064] In some embodiments, the liquid cosmetic may further contain a polysaccharide. By containing a polysaccharide in the liquid cosmetic, the luster pigment can be trapped in a network structure of the polysaccharide formed in the liquid cosmetic. Therefore, even if shear is applied to the liquid cosmetic, causing the house-of-card structure of the clay mineral particles to collapse and reducing the viscosity of the liquid cosmetic, sedimentation of the luster pigment can be suppressed.

[0065] The content of the polysaccharide in the liquid cosmetic may be 0.01% by mass or more and 0.30% by mass or less.

[0066] When the polysaccharide content in the liquid cosmetic is 0.01% by mass or more, the luster pigment is easily trapped in the shear-resistant network structure of the polysaccharide in the liquid cosmetic. Therefore, even if the card-house structure of the clay mineral particles is broken down by shear and the viscosity of the liquid cosmetic decreases, sedimentation of the luster pigment can be suppressed. Furthermore, when the polysaccharide content in the liquid cosmetic is 0.30% by mass or less, the viscosity of the liquid cosmetic does not become too high, making it easier to reduce the thickness of the liquid cosmetic coating. This tends to improve the quick-drying properties of the coating and makes it less likely that the luster of the lines drawn by the liquid cosmetic will be lost. Therefore, by including 0.01% by mass or more and 0.30% by mass or less of polysaccharide in the liquid cosmetic, it becomes easier to obtain a liquid cosmetic that is excellent at suppressing sedimentation and redispersing the luster pigment and that is less likely to lose the luster of the lines drawn.

[0067] Specific examples of polysaccharides include xanthan gum, succinoglycan, welan gum, alcasealan, alcasee gum, zeta sea gum, and gellan gum, which are derived from microorganisms; guar gum, psyllium seed gum, tamarind seed gum, tragacanth gum, and galactomannan, which are derived from seaweed; and ghatti gum and karaya gum, which are derived from plant resins.

[0068] Xanthan gum is a polysaccharide containing glucose, mannose, and glucuronic acid that is isolated and purified from the culture medium of Xanthomonas. Specific examples of xanthan gum include Kelzan, Kelzan S, Kelzan T, Kelzan ST, Kelzan ASX, Kelzan ASXT, Kelzan AR, Kelzan HP, Kelzan G, Ketolol CG, Kelzan CG-T, and Kelzan CG-SFT (all manufactured by Sansho Co., Ltd.), San-Ace, San-Ace S, San-Ace C, San-Ace CS, San-Ace BS, San-Ace NF, San-Ace G, San-Ace ES, San-Ace NXG-S, San-Ace NXG-C, and Bistop D-3000-DF and D-3000-DF-C (all manufactured by San-Ei Gen F.S.I. Co., Ltd.).

[0069] In some embodiments, the liquid cosmetic may further contain a pigment for coloring the liquid cosmetic.

[0070] As the pigment, any known pigment that is blended in ordinary cosmetics can be used without any particular limitation. Examples of pigments include inorganic powders such as aluminum oxide, magnesium oxide, zirconium oxide, magnesium carbonate, calcium carbonate, talc, kaolin, silica, and silicon carbide; organic powders such as magnesium stearate, zinc stearate, N-acylysine, and nylon; white inorganic pigments such as titanium oxide, zinc oxide, cerium oxide, and barium sulfate; colored inorganic pigments such as black iron oxide, red iron oxide, red iron oxide (a mixture of black iron oxide and red iron oxide), yellow iron oxide, carbon black, chromium oxide, chromium hydroxide, Prussian blue, ultramarine, and red iron oxide; organic pigments 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; and organic pigments 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.

[0071] The pigment content in the liquid cosmetic may be 3% by weight or more and 30% by weight or less, or 5% by weight or more and 20% by weight or less. If the pigment content is 3% by weight or more or 5% by weight or more, the color of the liquid cosmetic will be relatively deep, and the functionality as a cosmetic will be good. Furthermore, if the pigment content is 30% by weight or less or 20% by weight or less, the dispersibility of the pigment in the liquid cosmetic will be good, and color unevenness of the liquid cosmetic will be easily suppressed.

[0072] The liquid cosmetic according to some embodiments may contain other ingredients (such as preservatives and pH adjusters) in addition to the above-mentioned ingredients.

[0073] Preservatives are substances that have antiseptic, antiseptic enhancement, preservative, antibacterial, antifungal, and antioxidant functions. Examples of preservatives include phenoxyethanol, pentylene glycol, ethanol, parahydroxybenzoic acid esters, 1,2-pentanediol, pryl glycol, hexylene glycol, dehydroacetic acid, sodium dehydroacetate, ethylhexylglycerin, ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, 2-methyl-1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,2-pentanediol, and 1,2-hexanediol. and 1,2-heptanediol, methylparaben and its salts, ethylparaben and its salts, butylparaben and its salts, propylparaben and its salts, isobutylparaben and its salts, isopropylparaben, benzylparaben, isopropylmethylphenol, chlorhexidine gluconate solution, trichlorocarbanilide, carbolic acid, hexachlorophene, benzoic acid and its salts, undecylenic acid, salicylic acid, sorbic acid and its salts, photosensitizer No. 101, photosensitizer No. 201, photosensitizer No. 401, hinokitiol, benzyl Alcohol, piroctone olamine, iodopropynyl butylcarbamate, methyldibromoglutaronitrile, DMDM hydantoin, cetyltrimethylammonium chloride, cetylpyridinium chloride, benzethonium chloride, diisobutylethoxyethyldimethylbenzylammonium chloride, sodium N-lauryl sarcosinate, sodium N-palmethyl sarcosinate, lauroyl sarcosine, N-myristoyl glycine, potassium N-lauryl sarcosine, trimethylammonium chloride, aluminum chlorohydroxylactate Thorium, triethyl citrate, tricetylmethylammonium chloride, 2,4,4'-trichloro-2'-hydroxydiphenyl ether (triclosan), 1,5-pentanediol, 1,6-hexanediol, 3,4,4'-trichlorocarbanilide (triclocarban), diaminoalkylamide, L-lysine hexadecylamide, citrate heavy metal salts, salicylate, piroctose, zinc salts, pyrithione and its heavy metal salts, zinc pyrithione, zinc phenol sulfate, farnesol, ketoconazole,Oxiconazole, bifonazole, butoconazole, cloconazole, clotrimazole, econazole, enilconazole, fenticonazole, isoconazole, miconazole, sulconazole, tioconazole, fluconazole, itraconazole, terconazole, naftifine, terbinafine, selenium disulfide, methylchloroisothiazolinone, methylisothiazolinone, silver chloride, diazolidinyl urea, imidazolidinyl urea, undecylenic acid, chlorphenesin, propionic acid and its salts, salicylic acid, magnesium salicylate, salicylic acid Sodium citrate, titanium salicylate, chloroxylenol, sodium salt of diethylhexyl sulfosuccinate, sodium benzoate, (RS)-1-(4-chlorophenoxy)-1-imidazol-1-yl-3,3-dimethylbutan-2-one (climbazole), benzyl alcohol, phenoxyisopropanol, 2-bromo-2-nitropropane-1,3-diol, polyaminopropyl biguanide, iodopropynyl butylcarbamate, benzalkonium chloride, benzethonium chloride, pentanediol, 1,2-octanediol, sorbic acid, benzoic acid, lactic acid, imidazolidinyl urea, diazolidinyl urea, dimethyloldimethylhydantoin (DMDMH), chlorhexidine, sodium salt of hydroxymethylglycinate, hydroxyethylglycine of sorbic acid, N-oleylhydroxyhexanamide, phenylphenol and its salts, o-phenylphenol and its salts, p-chloro-m-cresol, p-chlorophenol, imidazolidinyl urea, copper usnate, oligopeptide-10, oligopeptide-76, formic acid, sodium formate , Silver Citrate, Quaternium-14, Quaternium-15, Glyoxal, Grapefruit Extract, Grapefruit Fruit Extract, Grapefruit Seed Extract, Cresol, Chloramine T, Chloroxylenol, Chlorcresol, Chlorobutanol, Silica Acid (Ammonium / Silver / Zinc / Al), Glycerin, Alpinia Alpinia Flower / Leaf / Seed / Stem Extract, Alpinia Alpinia Leaf / Stem Fermented Extract, Euonymus Rubra Extract, Coriander Leaf Extract, Pomegranate Peel Extract, Santalum Paniculatum Wood Water, Hexamidine Diisethionate, 1,2-Ethanediol, Sodium CitronellateSiberian larch wood extract, tocopherol, trimonium bromide, thyme leaf oil, thianthol, tea tree oil, basil, thiamine bislauryl sulfate, sodium hydroxymethylglycine, phenethyl alcohol, phenol, sodium phenolsulfonate, ferulic acid, ethyl ferulate, benzethonium chloride, silver borosilicate, Boesenbergia pansulata rhizome extract, macelignan, soapberry extract, methylpropanediol , Murayakoenji Leaf Oil, Rosemary Extract, Spiraea Spiraea Leaf Extract, Dimethylaminostyrylheptylmethylthiazolium Iodide, Bisethylquinolinium Ethylquinolinidenepentadiene Iodide, Lauryldiaminoethylglycine Sodium, Lauroylarginine Ethyl HCl, Ammonium Benzoate, Isobutyl Benzoate, Ethyl Benzoate, Pantothenyl Ethyl Benzoate, Phenyl Benzoate, Methyl Benzoate, Domiphen Bromide, Glyceryl Caprylate (Glycerin fatty acid esters), bisabolol, anisic acid, sorbitan caprylate, caprylyl glycol, glyceryl caprate, octanediol, alidimorph, tridemorph, dodemorph, dimethomorph; flusilazole, azaconazole, cyproconazole, epoxiconazole, fluconazole, propiconazole, tebuconazole, etc.; imazalil, thiophanate, benomyl, carbendazim, chlorothialonil, dicloran, trifoliate Roxystrobin, Floxystrobin, Dimoxystrobin, Azoxystrobin, Flucaranil, Prochloraz, Flusulfamide, Famoxadone, Captan, Maneb, Mancozeb, Dodisin, Dodine and Metalaxyl, Butylated Hydroxytoluene (BHT), Butylated Hydroxyanisole (BHA), Propyl Gallate, Octyl Gallate, Carotenoids, β-Carotene, Lycopene, Canthaxanthin, Ubiquinone, Pentaerythrityl Tetra(Dibutyl-hydroxy-cinnamate), Vitamin E, Trolox, Vitamin C and its Derivatives, α-Tocopherol, δ-Tocopherol, Ascorbic Acid, Ginkgo Biloba Extract, Aspalathus Linealis Extract, Disodium Isostearyl Ascorbyl Phosphate, Oolong Tea Extract, Hypericum Perforatum Extract, Coffee Extract, Coffee Seed Extract, Hypericum Perforatum Flower / Leaf / Stem Extract, Yarrow ExtractSericin, Thyme flower / leaf / stem extract, thyme extract, tea extract, tea leaf extract, clove extract, ascorbyl tetra-2-hexyldecanoate, ascorbyl tetrahexyldecanoate, calendula officinalis extract, ascorbyl palmitate phosphate trisodium, Haematococcus pluvialis extract, Haematococcus pluvialis oil, evening primrose seed extract, evening primrose extract, melissa extract, melissa leaf extract, magnesium ascorbyl L-phosphate, magnesium ascorbyl phosphate, etc., among which 1,2-hexanediol The following preservatives are known to have excellent long-term storage properties and are therefore preferred: caprylyl glycol, pentylene glycol, 1,3-butylene glycol, dipropylene glycol, hexylene glycol, phenoxyethanol, ethanol, glyceryl caprate, ethylhexylglycerin, sodium dehydroacetate, sodium benzoate, methylparaben and its salts, ethylparaben and its salts, butylparaben and its salts, propylparaben and its salts, isobutylparaben and its salts, isopropylparaben, and benzylparaben. These preservatives may be used alone or in combination of two or more.

[0074] The content of these preservatives in the liquid cosmetic may be 1.0 wt% or more and 27.0 wt% or less, or 3.0 wt% or more and 22.0 wt% or less, or 6.0 wt% or more and 17.0 wt% or less, based on the total weight of the cosmetic. When the content of these preservatives is 0.1 wt% or more, 3.0 wt% or more, or 6.0 wt% or more, the preservative performance is sufficiently exhibited. When the content is 27.0 wt% or less, 22.0 wt% or less, or 17.0 wt% or less, the skin irritation is tolerable.

[0075] Examples of pH adjusters include triethanolamine, ethanolamine, sodium hydroxide, calcium hydroxide, potassium hydroxide, magnesium hydroxide, ascorbic acid, glycolic acid, citric acid and its salts, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, diethanolamine, diisopropanolamine, hydrochloric acid, p-anisic acid, anisic acid, aspartic acid and its salts, triisopropanolamine, adipic acid, azelaic acid, anisic acid and its salts, aminoethylpropanediol, and arginine. Ingredients: L-arginine, ammonia, isopropanolamine, formic acid, glyoxylic acid, glycolic acid and its salts, glucuronic acid, zinc glycine, glutaric acid, clay minerals, chloroacetic acid, sodium silicate, ketoglutaric acid, succinic acid and its salts, dioleyl phosphate, cysteine hydrochloride, dimethyl MEA, oxalic acid, trisodium sulfosuccinate, sulfonated (styrene / DVB) crosspolymer, sodium sesquicarbonate, sebacic acid, tripeptide-51, tromethamine, basilite, bishydroxyethyl tromethamine, disodium pyrophosphate Sodium, tetrapotassium pyrophosphate, tetrasodium pyrophosphate, fumaric acid, sodium fumarate, propionic acid, benzilic acid, sodium borate, maltobionic acid, maleic acid, malonic acid, methylglucamine, methoxy PEG-114 / poly ε-caprolactone, morpholine, lactobionic acid, malic acid, phosphoric acid, potassium phosphate, ammonium phosphate, dipotassium phosphate, disodium phosphate, trisodium phosphate, pentasodium triphosphate, lactic acid, synthetic DNA aptamer-1, basic magnesium carbonate, basic zinc carbonate, benzoic acid, potassium carbonate , magnesium carbonate, sodium carbonate, ammonium carbonate, guanidine carbonate, potassium bicarbonate, sodium bicarbonate, ammonium bicarbonate, potassium nitrate, nitric acid, sodium binitrate, tartaric acid, disodium tartrate, potassium tartrate, acetic acid, calcium oxide, magnesium oxide, sodium oxide, etc., and among these, citric acid, sodium citrate, arginine, L-arginine, potassium hydroxide, sodium hydroxide, phosphoric acid, calcium phosphate, triethanolamine, etc. are known to be resistant to long-term changes in pH and are therefore preferred.These pH adjusters may be used alone or in combination of two or more.

[0076] The content of these pH adjusters in the liquid cosmetic may be from 0.01% to 3.5% by weight, or from 0.015% to 2.5% by weight, or from 0.02% to 1.8% by weight, based on the total weight of the cosmetic. Furthermore, the pH of the liquid cosmetic adjusted with the pH adjuster is preferably from 6 to 9. Within the desired range, the pH is close to that of human skin, so there is little change in pH even after application to the skin, and a good film can be formed.

[0077] (Method of manufacturing liquid cosmetics) The liquid cosmetic preparation according to some embodiments can be produced by various conventionally known methods.

[0078] Liquid cosmetic preparations according to some embodiments can be produced, for example, by the following procedure. First, clay mineral particles are added to a portion of the water, and the mixture is processed using a stirrer such as a propeller, homogenizer, or homodisper to produce a clay mineral dispersion. Next, the clay mineral dispersion, hexylene glycol, the first copolymer, the second copolymer, and the luster pigment are added to the remaining water, and the mixture is processed using a stirrer such as a propeller, homogenizer, or homodisper. In this manner, a liquid cosmetic preparation is obtained. Furthermore, during these preparation steps, the liquid cosmetic preparation can be stirred and dispersed by applying heat using a heater or by cooling, or by stirring and dispersing the liquid cosmetic. Removal of bubbles using a defoamer or filtration of coarse particles using a filter may be performed as needed. These various mixing, stirring and dispersing, filtering, heating, and cooling steps may each be performed independently, or two or more steps may be performed in parallel.

[0079] (Configuration of applicator)

[0080] The liquid cosmetic of the present invention can be suitably used by filling it into an applicator. The applicator may be an applicator for cosmetics such as eyeliner, eyebrow pencil, etc. However, the application of the liquid cosmetic of the present invention is not limited to applicators. The applicator may be of a type equipped with a temporary ink reservoir member having a comb-like cross section that directly stores ink in the liquid cosmetic storage chamber without using an ink absorbing body such as a fiber bundle, or may be of a type equipped with a valve mechanism that automatically opens and closes in response to operation or changes in internal pressure. When the liquid cosmetic used contains titanium oxide or a large-diameter plate-shaped luster pigment, it is preferable to store the liquid cosmetic directly in a fiber bundle called batting so that the ink contained in the liquid cosmetic storage chamber is used up, without absorbing it, and the ink supply mechanism to the application point is preferably one that uses a valve mechanism that can ensure a relatively large ink passage rather than one that passes through fine holes in a fiber bundle or a temporary ink reservoir member with a comb-like cross section, or one that is a ballpoint pen that controls the ink discharge with a valve formed in the pen tip or has a tip valve mechanism. Furthermore, by using a brush-type application tip that can freely form wide application marks as desired, it is possible to form wide application marks that make the most of the luster of the ink.

[0081] An example of the structure of an applicator is shown in Figure 1. The applicator according to one embodiment includes an applicator part and a liquid storage part that stores the liquid cosmetic described above, and is configured so that the liquid cosmetic is supplied from the liquid storage part to the applicator part. The applicator shown in Figure 1 is a brush pen-type applicator that uses a relatively soft applicator tip (applicator part) such as a brush tip, has a valve mechanism located at the connection between the applicator tip and a liquid cosmetic storage chamber, and opens and closes the valve mechanism by knocking the rear end, controlling the supply of liquid cosmetic to the applicator tip.

[0082] The applicator shown in Figure 1 has an application tip 2 (application section) at the tip of a barrel 1, a push-in type operating section 3 at the rear end, and a cap 4 that protects the application tip 2 can be fitted to the tip of the barrel 1. The cap 4 can also have anti-rolling ribs on its side wall to prevent the applicator from rolling when attached. The barrel 1 has a front barrel 1a equipped with an application tip 2 and a rear barrel 1b to which an operating part 3 is connected.

[0083] The front barrel 1a has a small diameter at its front end, close to the tip of the pen tip, matching the diameter of the pen tip, and a large diameter at its rear end, where it connects to the rear barrel 1b. Vertical ribs 5, which support the pen tip, are evenly arranged around the inside wall of the small diameter portion. The application tip 2 passes through a tip opening 6 formed at the tip of the front barrel 1a, at least in the knocking state, so that at least a portion of the application tip 2 is located forward of the tip opening 6. The vertical ribs 5 can break down solidified matter (such as aggregates of particles contained in the liquid cosmetic) around the application tip 2 and crush air bubbles contained in the liquid cosmetic, preventing them from being discharged further forward than the tip opening 6. A valve seat member 7 of a valve mechanism that controls the flow of ink is located in the large diameter rear portion of the front barrel 1a. The valve seat member 7 has a central hole 7a, which serves as an ink passage, at its center, and its peripheral portion serves as a valve seat that can be circumferentially abutted against a valve rod, described below. Furthermore, a coil spring 9 is fixed to the rear end of the valve seat member 7, which urges the valve rod 8 rearward to keep it in close contact with the valve seat when not in operation.

[0084] The rear barrel 1b has a rear hole 10 at its rear end, in which the operating unit 3 is disposed. A connecting rod 11 that transmits the pushing operation of the operating unit 3 to the valve rod 8 protrudes from the rear hole 10 and is liquid-tight sealed by a packing member 12 made of a rubber-elastic material and having a soft hinge portion 12a. When the operating unit 3 is pushed toward the inside of the barrel, it abuts against the rear end of the packing member 12, and the packing member 12 receives the pushing force, causing the hinge portion 12a to deform and transmit the pushing force to the connecting rod 11. As the connecting rod 11 advances, the valve rod 8 advances against the elastic force of the coil spring 9, releasing the valve mechanism and allowing the liquid cosmetic to flow. The coil spring 9 abuts against the tip surface of the connecting rod 11, which is the connecting step between the connecting rod 11 and the valve rod 8, and urges the connecting rod 11 and the valve rod 8 backward.When the pressing operation is released, the connecting rod 11 and the valve rod 8 move backward, closing the valve mechanism.

[0085] An application tip connection tube 13 is attached to the front end of the valve rod 8, and a brush-shaped application tip 2 is connected to the front end of the application tip connection tube 13. Therefore, the application tip 2 also moves forward in conjunction with the pressing operation of the operating part 3, and when the pressing operation is released, the application tip 2 also moves backward due to the elastic force of the coil spring 9. In this way, external force is applied to the liquid cosmetic present in the space around the application tip 2 with each operation, which prevents it from drying out and solidifying, and also assists in dispensing the liquid cosmetic. This mechanism is particularly effective when using a liquid with a relatively high solid content.

[0086] The interior of the rear barrel 1b is primarily a liquid cosmetic storage chamber (liquid storage section), and a plate-shaped stainless steel agitator 14 with protrusions for agitating the liquid cosmetic is located inside the rear barrel 1b as an internal component. Shaking the applicator causes the agitator 14 to move within the rear barrel 1b, agitating the liquid cosmetic stored therein. The agitator may be made of any suitable material, including stainless steel, polypropylene, talc-containing polypropylene, or other resins. The shape of the agitator may be rod-shaped or cylindrical, and may be plate-shaped or cylindrical. Using a transparent or translucent material for the rear barrel makes it easier to see the color of the liquid cosmetic contained therein. By narrowing at least a portion of the gap, the color and remaining amount of the liquid cosmetic can be more easily seen. The color of the agitator 14 can be made even more visible by selecting a color such as black, white, or milky white.

[0087] When the rear barrel 1b is pressed to eject the liquid cosmetic, the rear barrel 1b can be made of a flexible material such as a polyolefin resin such as low-density polyethylene, high-density polyethylene, or polypropylene, a polyester resin such as polyethylene terephthalate, polybutylene terephthalate, or polyethylene naphthalate, polyamide, polyacrylonitrile, polycarbonate, polyvinyl chloride, polystyrene, polyoxymethylene, or various elastomers. [Example]

[0088] The present invention will be described in detail below with reference to examples.

[0089] (Preparation of liquid cosmetics) Liquid cosmetics of Examples 1 to 13 and Comparative Examples 1 to 8 were prepared with the compositions shown in Tables 1 to 3 below. The specific materials used for each liquid cosmetic shown in Tables 1 to 3 were as follows: The numerical value for the content of each component in Tables 1 to 3 indicates the ratio (% by mass) to the mass of the liquid cosmetic.

[0090] <Brilliant pigments> Brilliant pigment A: Aluminum pigment (product name: Cosmicolor Metallics Frost Silver, manufactured by Toyo Aluminum Co., Ltd., average particle size: 20 μm) Brilliant pigment B: pearl pigment (product name: FANTASPEARL 0015SR, manufactured by Nihon Koken Kogyo Co., Ltd., average particle size: 9 μm) Brilliant pigment C: Glass flake pigment (product name: DK PEARL-GFIF GREEN, manufactured by Daito Kasei Kogyo Co., Ltd., average particle size: 100 μm) Brilliant pigment D: Glass flake pigment (product name: Metashine RC MT1200RS, manufactured by Nippon Sheet Glass Co., Ltd., average particle size: 200 μm)

[0091] <Coloring pigments> Carbon black (product name: DK Black) No. 2, manufactured by Daito Kasei Kogyo Co., Ltd.) Bengala (product name: SunCROMA C33-128, manufactured by DIC Corporation)

[0092] <Clay mineral particles> Clay mineral particles E: Bentonite (product name: Kunipia-F, manufactured by Kunimine Industries Co., Ltd., average particle size: 0.300 to 0.500 μm, thickness: approximately 1 nm) Clay mineral particles F: synthetic smectite (product name: Sumecton-SA, manufactured by Kunimine Industries Co., Ltd., average particle size: 0.080 to 0.100 μm, thickness: approximately 4 nm)

[0093] <First copolymer> Copolymer G: (styrene / acrylates) copolymer (emulsion, solids concentration: 50% water dispersion, product name: DAITOSOL 5000STY, manufactured by Daito Chemical Industry Co., Ltd.) Copolymer H...(Acrylates / ethylhexyl acrylate) copolymer (emulsion, solids concentration: 50% water dispersion, product name: DAITOSOL 5000SJ, manufactured by Daito Chemical Industry Co., Ltd.) Copolymer I...Acrylates copolymer (emulsion, solids concentration: 50% aqueous dispersion, product name: DAITOSOL 5000AD, manufactured by Daito Chemical Industry Co., Ltd.) The content (mass %) of the first copolymer in Tables 1 to 3 is the content as solid content in the liquid cosmetic preparation.

[0094] <Comparative polymer> PVP (Polyvinylpyrrolidone) (powder (solid content 100%), product name: Luvimer 100P, manufactured by BASF Japan Ltd.)

[0095] <Second copolymer> Copolymer J: (Methyl vinyl ether / maleic acid) copolymer (powder (solids 100%), product name: GANTREZ S-97 BF POLYMER, manufactured by Ashland Japan Co., Ltd.)

[0096] <Solvent> Hexylene glycol (trade name: HEXYLENEGLYCOL, manufactured by Arkema Co., Ltd.) 1,3-Butylene glycol (product name: High Sugarcane BG, manufactured by Kokyu Alcohol Kogyo Co., Ltd.) 1,2-Hexanediol (trade name: OPTIPHEN HD, manufactured by Ashland Japan Co., Ltd.)

[0097] <Polysaccharide> Xanthan gum (product name: KELTROL CG-T, manufactured by Sansho Co., Ltd.)

[0098] The liquid cosmetics of each Example and Comparative Example were prepared according to the following procedure. First, clay mineral particles were added to a portion of the water and processed using a stirrer to prepare a clay mineral dispersion. Next, the clay mineral dispersion, solvent (hexylene glycol, etc.), polymer (first copolymer, second copolymer, or comparative polymer), and luster pigment were added to the remaining water and stirred using a stirrer. In this way, the liquid cosmetics of each Example and Comparative Example were obtained.

[0099] The viscosity measurement results for the obtained liquid cosmetic preparations are shown in Tables 1 to 3. The viscosity of each liquid cosmetic preparation was determined by measuring the flow curve using a rheometer MCR302 (manufactured by Anton Paar Japan Co., Ltd.). The jig used was a φ50 mm cone plate, and the shear viscosity was measured at a shear rate of 19.2 (1 / s) and a temperature of 25°C.

[0100] (Evaluation method) The liquid cosmetics of each Example and Comparative Example were evaluated for sedimentation state, redispersibility, dryness, and radiance. The evaluation methods and evaluation criteria for each evaluation item are as follows. The evaluation results are shown in Tables 1 and 2.

[0101] <Subsidence state> A sample of each liquid cosmetic was placed in a glass tube and left to stand in an environment of 40°C for 2 months, after which the state of settling of the luster pigment was visually checked and evaluated according to the following evaluation criteria. [Evaluation criteria] AA: The glittering powder can be seen up to the top of the liquid. A: The glittering powder can be visually confirmed from the middle to about 3 / 4 of the liquid. B: The glittering powder can be visually confirmed up to the middle of the liquid. C: Shiny powder can be visually confirmed at the bottom of the liquid. D: The glittering powder can only be visually confirmed at the bottom of the liquid.

[0102] <Redispersibility> A sample of each liquid cosmetic was placed in a glass tube and left to stand in an environment of 40°C for 2 months, after which it was shaken by hand 1 to 5 times (redispersion 1) and 20 to 30 times (redispersion 2), and the redispersibility was visually confirmed. [Evaluation criteria] A: After shaking it 1 to 5 times, all the clumps of glitter powder at the bottom will immediately break up and the glitter powder can be visually confirmed throughout. B: After shaking 20 to 30 times, all the clumps of glitter powder at the bottom break up and the glitter powder can be visually confirmed throughout. C: After shaking 20 to 30 times, the clumps of glitter powder at the bottom break up, but the clumps do not disappear completely. D: Even after shaking 20 to 30 times, the lump of glitter powder at the bottom did not break up and most of it remained, with no significant change from before shaking.

[0103] <Drying> Each liquid cosmetic composition filled in the applicator shown in Figure 1 was applied to the back of the hand in three lines, each 2 mm wide and 4 cm long, using the applicator. The time until the glittering pigment no longer left on the fingers when touched was measured, and the drying properties were evaluated according to the following evaluation criteria. [Evaluation criteria] A: Within 25 seconds B: 26 seconds ~ 55 seconds C: 56 seconds ~ 90 seconds D: 91 seconds or more

[0104] <Shining feeling> Each liquid cosmetic filled in the applicator shown in Figure 1 was applied to the back of the hand using the applicator in three lines 2 mm wide and 4 cm long, and the sense of brilliance was visually confirmed and evaluated according to the following evaluation criteria. [Evaluation criteria] A: It has a very high shine. B: High brightness. C: Low brightness. D: Almost no brilliance.

[0105] [Table 1]

[0106] [Table 2]

[0107] [Table 3]

[0108] (Evaluation results) For the liquid cosmetics of Examples 1 to 13, the evaluation results for sedimentation state, re-dispersion 1 and re-dispersion 2 were AA, A or B, and the evaluation results for at least one of dryness and radiance were A or B. In contrast, the liquid cosmetics of Comparative Examples 1 to 8, which do not contain at least any of clay mineral particles, the first copolymer (a copolymer containing, as a monomer unit, at least one selected from acrylic acid, methacrylic acid, acrylic esters, and methacrylic esters), the second copolymer (a copolymer containing, as a monomer unit, at least one selected from maleic acid, maleic anhydride, maleic esters, and derivatives thereof, and at least one selected from alkyl vinyl ethers, vinyl alcohol, α-olefins, styrene, and styrene derivatives), or hexylene glycol, received evaluation results of C or D for the sedimentation state, redispersion 1, and redispersion 2. Furthermore, the liquid cosmetics of Comparative Examples 1, 2, 6, and 7, which do not contain hexylene glycol, received evaluation results of C or D for dryness and radiance. From this, it was found that the liquid cosmetic according to the embodiment of the present invention has excellent sedimentation suppression and redispersibility of the glitter pigment, and also has excellent drying properties and is less likely to impair the glitter of drawn lines.

[0109] Furthermore, when the liquid cosmetic of Example 2 was compared with the liquid cosmetic of Comparative Example 8, which had the same composition as Example 2 except that it did not contain the second copolymer (maleic acid-based copolymer), the liquid cosmetic of Example 2 provided better results, particularly in the sedimentation state, redispersion 1, and redispersion 2. This demonstrates that by including the second copolymer in the liquid cosmetic, sedimentation of the glitter pigment can be more effectively suppressed, or the redispersibility of the glitter pigment can be improved.

[0110] Furthermore, when comparing Examples 1 and 2, which contain a styrene-acrylic copolymer (i.e., a first copolymer containing styrene as monomer units and at least one selected from acrylic acid, methacrylic acid, acrylic acid esters, and methacrylic acid esters), with Example 3, which contains an acrylic copolymer that does not contain styrene (i.e., a first copolymer containing, as monomer units, two or more selected from acrylic acid, methacrylic acid, acrylic acid esters, and methacrylic acid esters), the liquid cosmetics of Examples 1 and 2 obtained better results in terms of sedimentation state and re-dispersion 1. This shows that the styrene-acrylic copolymer can effectively prevent the settling of the bright pigment, or improves the redispersibility of the bright pigment.

[0111] Furthermore, when comparing Examples 1 and 2, in which the hexylene glycol content is in the range of 1.0% by mass or more and 4.0% by mass or less, with Examples 7 and 8, in which the hexylene glycol content is outside this range, the liquid cosmetics of Examples 1 and 2 obtained better results in terms of sedimentation state and re-dispersion 1. This shows that by setting the content of hexylene glycol in the liquid cosmetic to a range of 1.0% by mass or more and 4.0% by mass or less, it is possible to effectively prevent the settling of the glitter pigment, or to improve the redispersibility of the glitter pigment.

[0112] Furthermore, when comparing Examples 1 and 2, in which the polysaccharide (xanthan gum) content is in the range of 0.01% by mass or more and 0.30% by mass or less, with Examples 4 to 6, in which the polysaccharide (xanthan gum) content is outside this range, the liquid cosmetics of Examples 1 and 2 obtained better results in terms of sedimentation state and re-dispersion 1. This shows that by setting the polysaccharide content in the liquid cosmetic to a range of 0.01% by mass or more and 0.30% by mass or less, it is possible to effectively prevent the settling of the glitter pigment, or to improve the redispersibility of the glitter pigment.

[0113] In addition, the average particle diameter r of the bright pigment Pis 10 μm or more and 150 μm or less, and the average particle diameter r of the clay mineral particles C Examples 1 and 2 in which the average particle diameter r of the bright pigment is 0.250 μm or more and 0.550 μm or less, P When compared with Examples 9 and 10, which are outside the range, the liquid cosmetics of Examples 1 and 2 provide better results in terms of sedimentation state and re-dispersion 1. From this, the average particle diameter r of the glitter pigment in the liquid cosmetic P is 10 μm or more and 150 μm or less, and the average particle diameter r of the clay mineral particles C It can be seen that by making the particle size 0.250 μm or more and 0.550 μm or less, sedimentation of the bright pigment can be effectively suppressed, or the redispersibility of the bright pigment can be improved.

[0114] As described above, it is clear that the liquid cosmetic compositions according to the examples of the present invention are excellent in suppressing sedimentation and redispersibility of the glitter pigment, and are also able to provide liquid cosmetics that are less likely to impair the glitter of drawn lines.

[0115] The contents described in each of the above embodiments can be understood, for example, as follows.

[0116] [1] The liquid cosmetic according to at least one embodiment of the present invention comprises: A photoluminescent pigment; Clay mineral particles; a first copolymer containing, as a monomer unit, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester; a second copolymer containing, as monomer units, at least one selected from maleic acid, maleic anhydride, maleic esters, and derivatives thereof, and at least one selected from alkyl vinyl ethers, vinyl alcohol, α-olefins, styrene, and styrene derivatives; hexylene glycol, Water and Contains:

[0117] In the above configuration [1], the liquid cosmetic contains clay mineral particles, so that a three-dimensional house-of-cards structure of the clay mineral particles is formed in the liquid cosmetic, and the glittering pigment is trapped in this house-of-cards structure, which prevents the glittering pigment from settling and also prevents adhesion and aggregation between glittering pigments due to hydrophobic interactions, resulting in good redispersibility of the glittering pigment in the liquid cosmetic.

[0118] Furthermore, in the above-mentioned configuration [1], the liquid cosmetic contains a first copolymer (acrylic copolymer) containing, as monomer units, at least one selected from acrylic acid, methacrylic acid, acrylic esters, and methacrylic esters, and a second copolymer (maleic acid copolymer) containing, as monomer units, at least one selected from maleic acid, maleic anhydride, maleic esters, and their derivatives, and at least one selected from alkyl vinyl ethers, vinyl alcohol, α-olefins, styrene, and styrene derivatives. Therefore, the three-dimensional structure of the first and second copolymers effectively suppresses adhesion and aggregation due to hydrophobic interactions between the bright pigments, thereby further suppressing sedimentation and improving redispersibility of the bright pigments.

[0119] Furthermore, in the above-mentioned configuration [1], since the liquid cosmetic contains the above-mentioned first copolymer, second copolymer, and hexylene glycol, a three-dimensional structure is formed by hydrogen bonds between the carboxyl groups or carbonyl groups of the first copolymer and the second copolymer and the hydroxyl groups of the hexylene glycol. This three-dimensional structure effectively suppresses adhesion and aggregation due to hydrophobic interactions between the bright pigments. This further improves the suppression of sedimentation and redispersibility of the bright pigment.

[0120] Furthermore, in the above-mentioned configuration [1], since the liquid cosmetic contains the above-mentioned first copolymer, second copolymer, and hexylene glycol, a complex of these components is formed in water due to the interaction (hydrophobic bond) between the hydrophobic groups of the first copolymer, second copolymer, and hexylene glycol. This complex penetrates between the bright pigments, effectively suppressing adhesion and aggregation due to hydrophobic interactions between the bright pigments. This results in better suppression of sedimentation and redispersibility of the bright pigments.

[0121] Furthermore, in the above-mentioned configuration [1], since the liquid cosmetic contains the above-mentioned first copolymer, second copolymer, and hexylene glycol, the hydrophobic groups of the first copolymer, second copolymer, and hexylene glycol in water are easily adsorbed to the bright pigment due to hydrophobic interactions with the bright pigment, and adhesion and aggregation due to hydrophobic interactions between bright pigments can be effectively suppressed, thereby further suppressing sedimentation of the bright pigment and improving redispersibility.

[0122] Furthermore, in the above-mentioned configuration [1], since the liquid cosmetic contains the first and second copolymers described above, the house-of-cards structure formed by the clay mineral particles is reinforced by the charges of the alkyl groups, carboxyl groups, or carbonyl groups of the first and second copolymers. That is, even if the house-of-cards structure of the clay mineral particles attempts to collapse, the charges of the functional groups described above of the first and second copolymers (positive charges of the alkyl groups and negative charges of the carboxyl groups or carbonyl groups) interact with the surface charges (negative charges) of the clay mineral particles, thereby tending to maintain the house-of-cards structure of the clay mineral particles. This effectively inhibits settling of the luster pigment and improves the redispersibility of the luster pigment.

[0123] In addition, in the above-mentioned configuration [1], since the liquid cosmetic contains the second copolymer, the maleic acid portion of the second copolymer is soluble in a divalent cation (Ca 2+The chelating and stabilizing effect of the acrylate acrylate on the cations present between the layers of the clay mineral particles and the positive charges at the ends of the clay mineral particles acts on the cations present between the layers of the clay mineral particles and the positive charges at the ends of the clay mineral particles, making it easier for the glittering pigment to bond with the clay mineral particles and more firmly maintaining the house-of-card structure of the clay mineral particles that have incorporated the glittering pigment.As a result, sedimentation of the glittering pigment is more effectively suppressed, and adhesion and aggregation due to hydrophobic interactions between the glittering pigments is more effectively suppressed, resulting in better redispersibility of the glittering pigment in liquid cosmetics.

[0124] Furthermore, in the above-mentioned configuration [1], the liquid cosmetic contains hexylene glycol, which provides the liquid cosmetic with excellent drying properties. This allows the drawn lines formed by application of the liquid cosmetic to dry in a short time, and prevents the pigment from peeling off during drying. This makes it difficult for the brilliance of the drawn lines of the liquid cosmetic to be impaired.

[0125] Furthermore, in the above-mentioned configuration [1], the liquid cosmetic contains hexylene glycol, which, as described above, contributes to inhibiting the settling of the glitter pigment in the liquid cosmetic. This allows for a reduction in the content of thickeners, such as polysaccharides, used to inhibit the settling of the glitter pigment, and accordingly reduces the viscosity of the liquid cosmetic. This allows for a thinner coating thickness of the liquid cosmetic, which improves the quick-drying properties of the coating and prevents the glitter of the lines drawn by the liquid cosmetic from being lost.

[0126] Furthermore, in the above-mentioned configuration [1], since the liquid cosmetic contains the second copolymer, the coating film of the liquid cosmetic has good affinity to the skin, and the second copolymer is adsorbed to the glittering pigment through hydrophobic interactions, which improves the affinity of the glittering pigment to the skin. As a result, the coating film of the liquid cosmetic and the glittering pigment are quickly adsorbed to the skin and fixed, making them less likely to peel off, and as a result, the glittering feel of the lines drawn by the liquid cosmetic is less likely to be lost.

[0127] As described above, the above-mentioned configuration [1] makes it possible to obtain a liquid cosmetic that is excellent in suppressing sedimentation of the glitter pigment and in redispersibility, and that is less likely to impair the glitter of the drawn lines.

[0128] [2] In some embodiments, in the configuration of [1] above, The first copolymer contains, as monomer units, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester, and styrene.

[0129] In the above-mentioned configuration [2], the first copolymer (acrylic copolymer) is a styrene-acrylic copolymer containing styrene as a monomer unit. Therefore, the three-dimensional structure of the first copolymer containing styrene groups can more effectively suppress adhesion and aggregation due to hydrophobic interactions between the bright pigments. This improves the sedimentation suppression and redispersibility of the bright pigment. Furthermore, the alkyl, carboxy, or carbonyl groups of the first copolymer, as well as the charge of the styrene groups, more effectively reinforce the house-of-card structure formed by the clay mineral particles. This effectively suppresses the sedimentation of the bright pigment and improves the redispersibility of the bright pigment. Therefore, the above-mentioned configuration [2] can improve the sedimentation suppression and redispersibility of the bright pigment.

[0130] [3] In some embodiments, in the configuration of [1] or [2] above, The second copolymer contains, as monomer units, at least one selected from maleic acid, maleic anhydride, and maleic acid ester, and methyl vinyl ether.

[0131] According to the above-mentioned configuration [3], the second copolymer (maleic acid-based copolymer) is formed from methyl vinyl ether, which is relatively easily available, so that the above-mentioned liquid cosmetic preparation [1] can be obtained relatively easily.

[0132] [4] In some embodiments, in any of the configurations [1] to [3] above, The content of the second copolymer in the liquid cosmetic is 0.03% by mass or more and 2.0% by mass or less.

[0133] In the above-mentioned configuration [4], the content of the second copolymer in the liquid cosmetic is 0.03% by mass or more, which makes it easier to achieve the effects of inhibiting sedimentation and improving redispersibility of the glitter pigment, as described in the above-mentioned [1], due to the three-dimensional structure, hydrogen bonds, hydrophobic bonds, charge action, and chelating action formed by the second copolymer, and also makes it easier to achieve the effect of improving the adhesion of the liquid cosmetic coating and glitter particles to the skin. In the above-mentioned configuration [4], the content of the second copolymer in the liquid cosmetic is 2.0% by mass or less, which makes it less likely to impair the quick-drying effect of hexylene glycol. Therefore, the above-mentioned configuration [4] makes it easier to obtain a liquid cosmetic that has excellent sedimentation inhibition and redispersibility of the glitter pigment and is less likely to lose the brilliance of the drawn lines.

[0134] [5] In some embodiments, in any of the configurations [1] to [4] above, Further containing polysaccharides, The content of the polysaccharide in the liquid cosmetic is 0.01% by mass or more and 0.30% by mass or less.

[0135] In the above-mentioned configuration [5], the polysaccharide content in the liquid cosmetic is 0.01% by mass or more, so that the luster pigment is easily trapped in the shear-resistant network structure of the polysaccharide in the liquid cosmetic. Therefore, even if the card-house structure of the clay mineral particles is broken down by shear and the viscosity of the liquid cosmetic decreases, sedimentation of the luster pigment can be suppressed. Furthermore, in the above-mentioned configuration [5], the polysaccharide content in the liquid cosmetic is 0.30% by mass or less, so that the liquid cosmetic coating thickness can be easily reduced. This facilitates improving the quick-drying properties of the coating film and preventing the loss of the luster of the lines drawn by the liquid cosmetic. Therefore, the above-mentioned configuration [5] facilitates the production of a liquid cosmetic that exhibits excellent luster pigment sedimentation suppression and redispersibility, and that is less likely to lose the luster of the lines drawn.

[0136] [6] In some embodiments, in any of the configurations [1] to [5] above, The content of hexylene glycol in the liquid cosmetic is 1.0% by mass or more and 4.0% by mass or less.

[0137] In the above-mentioned configuration [6], the content of hexylene glycol in the liquid cosmetic is 1.0% by mass or more, thereby achieving the above-mentioned effects of hexylene glycol in inhibiting sedimentation of the glitter pigment and improving redispersibility, and also improving the drying properties of the liquid cosmetic. Furthermore, in the above-mentioned configuration [6], the content of hexylene glycol in the liquid cosmetic is 4.0% by mass or less, so the viscosity of the liquid cosmetic is not too high, allowing the coating thickness of the liquid cosmetic to be thin. This tends to improve the quick-drying properties of the coating film, and also tends to prevent the loss of the glitter of the lines drawn by the liquid cosmetic. Therefore, the above-mentioned configuration [6] makes it easier to obtain a liquid cosmetic that exhibits excellent inhibition of sedimentation and redispersibility of the glitter pigment, and that is less likely to reduce the glitter of the lines drawn.

[0138] [7] In some embodiments, in any of the configurations [1] to [6] above, The average particle diameter r of the bright pigment P The average particle diameter r of the clay mineral particles C The ratio of r C / r P is greater than or equal to 0.0016 and less than or equal to 0.055.

[0139] According to the above-mentioned configuration [7], the average particle diameter r P Average particle size r of clay mineral particles C The ratio of r C / r P Since the average particle size r of the bright pigment is 0.0016 or more, the size of the clay mineral particles is somewhat larger than that of the bright pigment. Therefore, the bright pigment is less likely to settle out of the house-of-cards structure of the clay mineral particles. Furthermore, according to the configuration [7] above, the average particle size r of the bright pigment P Average particle size r of clay mineral particles C The ratio of r C / r Pis 0.055 or less, the weight per particle of the glitter pigment is not too large relative to the clay mineral particles. Therefore, the glitter pigment particles are easily incorporated into the three-dimensional structure of the house-of-cards structure of the clay mineral particles. This makes it easy to suppress sedimentation of the glitter pigment in the liquid cosmetic, and also makes it easy to improve the redispersibility of the glitter pigment. Therefore, the above-mentioned configuration [7] makes it easy to obtain a liquid cosmetic that is excellent in suppressing sedimentation and redispersibility of the glitter pigment, and that is less likely to impair the glitter of drawn lines.

[0140] [8] In some embodiments, in any of the configurations [1] to [7] above, The average particle diameter r of the bright pigment P is 10 μm or more and 150 μm or less, The clay mineral particles have an average particle diameter r C is 0.250 μm or more and 0.550 μm or less.

[0141] In the above configuration [8], the average particle diameter r of the bright pigment P is 10 μm or more, and the average particle diameter r of the clay mineral particles C is 0.250 μm or more and 0.550 μm or less, the size of the luster pigment is somewhat larger than that of the clay mineral particles. Therefore, the luster pigment is less likely to settle out of the house-of-card structure of the clay mineral particles and the three-dimensional structure of the first copolymer, second copolymer, and hexylene glycol, and the luster of the luster pigment is more easily obtained. Furthermore, in the above-mentioned configuration [8], the average particle diameter r of the luster pigment is P Since the diameter of the luster pigment is 150 μm or less, the weight per particle of the luster pigment is not too large. Therefore, the luster pigment particles are easily incorporated into the house-of-card structure of the clay mineral particles and the three-dimensional structure of the first copolymer, second copolymer, and hexylene glycol. This makes it easy to suppress sedimentation of the luster pigment in the liquid cosmetic, and also makes it easy to improve the redispersibility of the luster pigment. Therefore, the above-mentioned configuration [8] makes it easy to obtain a liquid cosmetic that is excellent in suppressing sedimentation and redispersibility of the luster pigment, and that is less likely to impair the brilliance of the drawn lines.

[0142] [9] In some embodiments, in any of the configurations [1] to [8] above, The bright pigment contains aluminum.

[0143] The surface of aluminum-containing bright pigments is often hydrophobized to prevent them from dissolving in aqueous solvents. According to the configuration [9] above, the liquid cosmetic containing the aluminum-containing bright pigment includes a second copolymer (maleic acid-based copolymer), and the interaction between the hydrophobic surface of the bright pigment and maleic acid facilitates the incorporation of the bright pigment into the three-dimensional structure of the second copolymer. This effectively inhibits adhesion and aggregation between bright pigments due to hydrophobic interactions. Furthermore, the maleic acid portion of the second copolymer surrounds the aluminum through a chelating action, more effectively inhibiting adhesion and aggregation between aluminum-containing bright pigments. This improves the inhibition of sedimentation and redispersibility of the bright pigment.

[0144]

[10] At least one embodiment of the applicator of the present invention comprises: an application part (e.g., application destination 2); a liquid storage section (for example, a liquid cosmetic storage chamber inside the rear body 1b) that stores the liquid cosmetic material described in any one of [1] to [9] above, The liquid cosmetic is configured to be supplied from the liquid storage section to the application section.

[0145] In the configuration

[10] above, the applicator has an applicator part to which the liquid cosmetic described in any one of the above [1] to [9] is supplied. Therefore, the configuration

[10] above provides an applicator that is excellent in suppressing sedimentation and redispersibility of the glitter pigment, and is capable of discharging a liquid cosmetic that is less likely to impair the glitter of the drawn lines.

[0146] The above describes an embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and also includes forms in which the above-described embodiment is modified, or forms in which these forms are appropriately combined.

[0147] In this specification, expressions expressing relative or absolute arrangement such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" not only express such an arrangement strictly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions such as "identical," "equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. Furthermore, in this specification, expressions representing shapes such as a rectangular shape or a cylindrical shape not only represent rectangular shapes or cylindrical shapes in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained. Furthermore, in this specification, the expressions "comprise," "include," or "have" a component are not exclusive expressions that exclude the presence of other components. [Explanation of symbols]

[0148] 1 shaft cylinder 1a front axle 1b rear axle 2 Application destination 3 Control section 4 Cap 5 Vertical ribs 6 Tip opening 7 Valve seat material 7a Center hole 8 Bento 9 coil springs 10 Posterior foramen 11 Connecting rod 12 Packing material 12a Hinge part 13 Application destination connection pipe 14 Stirring body

Claims

1. A photoluminescent pigment; Clay mineral particles; a first copolymer containing, as a monomer unit, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester; a second copolymer containing, as monomer units, at least one selected from maleic acid, maleic anhydride, maleic esters, and derivatives thereof, and at least one selected from alkyl vinyl ethers, vinyl alcohol, α-olefins, styrene, and styrene derivatives; hexylene glycol, Water and A liquid cosmetic comprising:

2. The first copolymer contains, as monomer units, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester, and styrene. The liquid cosmetic according to claim 1.

3. The second copolymer contains, as monomer units, at least one selected from maleic acid, maleic anhydride, and maleic acid ester, and methyl vinyl ether. The liquid cosmetic according to claim 1 or 2.

4. The content of the second copolymer in the liquid cosmetic is 0.03% by mass or more and 2.0% by mass or less. The liquid cosmetic according to claim 1 or 2.

5. Further containing polysaccharides, The content of the polysaccharide in the liquid cosmetic is 0.01% by mass or more and 0.30% by mass or less. The liquid cosmetic according to claim 1 or 2.

6. The content of hexylene glycol in the liquid cosmetic is 1.0% by mass or more and 4.0% by mass or less. The liquid cosmetic according to claim 1 or 2.

7. The average particle diameter r of the bright pigment Ｐ The average particle diameter r of the clay mineral particles Ｃ The ratio r Ｃ / r Ｐ is equal to or greater than 0.0016 and equal to or less than 0.055 The liquid cosmetic according to claim 1 or 2.

8. The average particle diameter r of the bright pigment Ｐ is 10 μm or more and 150 μm or less, The average particle diameter r of the clay mineral particles Ｃ is 0.250 μm or more and 0.550 μm or less The liquid cosmetic according to claim 1 or 2.

9. The bright pigment contains aluminum. The liquid cosmetic according to claim 1 or 2.

10. An application unit; a liquid storage section that stores the liquid cosmetic according to claim 1 or 2; The liquid cosmetic is supplied from the liquid storage section to the application section. Applicator.

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