Liquid cosmetic and applicator

Abstract

To provide a liquid cosmetic that effectively suppresses the sedimentation of a brilliant pigment and guarantees its re-dispersion, and ensures that the brilliance of drawn lines is not impaired, and to provide an applicator.SOLUTION: A liquid cosmetic comprises a brilliant pigment, clay mineral particles, a copolymer comprising at least one selected from acrylic acid, methacrylic acid, acrylate, and methacrylate 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] 2. Description of the Related Art Liquid cosmetics (such as eyeliners) are used for forming glittering lines on the surface of the skin or the like by application 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 intended to obtain a clear, lustrous coating film without the plate-like pigment overlapping even 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 components in the aqueous liquid cosmetic, it is possible to obtain a liquid cosmetic in which the glittering powder is less likely to settle, has excellent storage stability, and has excellent redispersibility of the settled glittering powder, and can be sufficiently ejected even in a pen-type form. [Prior art documents] [Patent documents]

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

[0006] For example, conventional liquid cosmetics containing glittering pigments, such as those disclosed in Patent Documents 1 and 2, have 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 the glittering pigment contained in the coating film is likely to peel off together with the liquid components when the coating film is touched by a finger or other object while drying, and the glittering feel of the lines formed on the surface of the skin is relatively easily 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 a glittering pigment and that are less likely to impair the glittering feel 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 copolymer including, as a monomer unit, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester; Hexylene glycol, Water, Contains:

[0009] In addition, the applicator according to at least one embodiment of the present invention includes: An application unit; A liquid storage section that stores the above-mentioned liquid cosmetic material, The liquid cosmetic is configured to be supplied from the liquid storage section to the application section. Effect of the Invention

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

[0011] [Figure 1] FIG. 2 is a longitudinal cross-sectional view of the applicator according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, some 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 the 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 cosmetic preparation) The liquid cosmetic composition according to some embodiments is a liquid cosmetic composition 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 preparation according to some embodiments contains a glittering pigment, clay mineral particles, a copolymer including, as a monomer unit, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester, hexylene glycol, and water.

[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 then 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 glittering pigment is a hydrophobic particle having a plate-like shape that imparts glittering to the liquid cosmetic. If there is nothing between the glittering pigment particles, the particles will adhere to each other surface-to-surface and tend to be in a hard, difficult-to-dissolve state. When the glittering pigment is dispersed in water, the particles will adhere to each other more firmly due to hydrophobic interactions between the glittering pigment particles.

[0017] In this regard, since the liquid cosmetic according to the above-mentioned embodiment contains clay mineral particles, a three-dimensional house-of-cards structure of the clay mineral particles is formed in the liquid cosmetic, and the glittering pigment is captured in this house-of-cards structure, which inhibits settling of the glittering pigment and inhibits adhesion and aggregation between the 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-mentioned embodiment contains a copolymer (i.e., an acrylic copolymer; hereinafter, simply referred to as a copolymer) containing at least one monomer unit selected from acrylic acid, methacrylic acid, acrylic acid esters, and methacrylic acid esters, and the three-dimensional structure of the copolymer can effectively suppress adhesion and aggregation caused by hydrophobic interactions between the glittering pigments, thereby improving the suppression of sedimentation and redispersibility of the glittering pigment.

[0019] Furthermore, since the liquid cosmetic according to the above-mentioned embodiment contains the above-mentioned copolymer and hexylene glycol, a three-dimensional structure is formed in the liquid cosmetic by hydrogen bonds between the carboxyl group or carbonyl group of the copolymer and the hydroxyl group of the hexylene glycol. This three-dimensional structure can effectively suppress adhesion and aggregation caused by hydrophobic interactions between the glittering pigments. This leads to better suppression of sedimentation and redispersibility of the glittering pigment.

[0020] In addition, since the liquid cosmetic according to the above embodiment contains the copolymer, the card house structure formed by the clay mineral particles is reinforced by the charge of the alkyl group, carboxy group, carbonyl group, etc. of the copolymer. That is, even if the card house structure of the clay mineral particles is about to collapse, the card house structure of the clay mineral particles is likely to be maintained by the interaction between the charge of the functional group of the copolymer and the charge on the surface of the clay mineral particles. Therefore, the sedimentation of the luster pigment is effectively suppressed, and the redispersibility of the luster pigment is improved.

[0021] Furthermore, since the liquid cosmetic according to the above-mentioned embodiment contains hexylene glycol, it is possible to impart excellent drying properties to the liquid cosmetic. As a result, the lines drawn by application of the liquid cosmetic can be dried in a short time, and peeling of the glittering pigment during drying can be suppressed. As a result, the glittering of the lines drawn by the liquid cosmetic is less likely to be impaired.

[0022] Furthermore, since the liquid cosmetic according to the above-mentioned embodiment contains hexylene glycol, as described above, hexylene glycol contributes to suppression of settling of the glittering pigment in the liquid cosmetic. This allows the content of thickeners such as polysaccharides used for the purpose of suppressing settling of the glittering pigment to be reduced, and the viscosity of the liquid cosmetic can be reduced accordingly. This allows the coating thickness of the liquid cosmetic to be reduced, which improves the quick-drying property of the coating and makes it difficult for the glittering feeling of the lines drawn by the liquid cosmetic to be impaired.

[0023] As described above, according to the above-described embodiment, it is possible to obtain a liquid cosmetic preparation which is excellent in suppressing sedimentation of the glitter pigment and in redispersibility, and which is less likely to impair the glitter of drawn lines.

[0024] In this specification, the redispersibility of the glittering pigment 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 left to sit 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.

[0025] The above-mentioned luster pigment is a plate-like 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.

[0026] Examples of commercially available products that can be used as the above-mentioned brilliant pigment 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 Chemical Industry 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.).

[0027] Average particle size of glitter pigment r Pmay be 10 μm or more and 150 μm or less. If the average particle size of the luster pigment is 10 μm or more, the size of the luster pigment is somewhat larger than that of clay mineral particles and the like. Therefore, the luster pigment is less likely to settle out of the card house structure of the clay mineral particles and the three-dimensional structure of the copolymer and hexylene glycol, and the luster of the luster pigment is easily obtained. If 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 easily incorporated into the card house structure of the clay mineral particles and the three-dimensional structure of the copolymer and hexylene glycol. Therefore, the sedimentation of the luster pigment in the liquid cosmetic is easily suppressed, and the luster pigment is easily redispersed.

[0028] 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 property of the liquid cosmetic tends to be sufficient. 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 tends to have good applicability.

[0029] 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.

[0030] 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.).

[0031] Average particle size of clay mineral particles r Cmay be 0.250 μm or more and 0.550 μm or less. If the average particle size of the clay mineral particles is 0.250 μm or more and 0.550 μm or less, the glittering 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 glittering pigment particles are more likely to be incorporated into the house-of-cards structure of the clay mineral particles. Therefore, the glittering pigment is more likely to be prevented from settling in the liquid cosmetic, and the glittering pigment is more likely to be redispersed well.

[0032] 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 card house structure formed by the clay mineral particles, which makes it easier to suppress the settling of the glittering pigment in the liquid cosmetic. If the content of clay mineral particles is 1.0% by mass or less, the glittering feel of the liquid cosmetic due to the glittering pigment is less likely to be impaired by the clay mineral particles.

[0033] The average particle size of the above-mentioned glittering pigment is r P Average particle size of clay mineral particles r C Ratio of C / r P may be 0.0016 or more and 0.055 or less.

[0034] 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 luster pigment. Therefore, the luster pigment is less likely to settle by avoiding the house-of-cards structure of the clay mineral particles. C / r P If the weight per particle of the glittering pigment is 0.055 or less, the weight per particle of the glittering pigment is not too large relative to the clay mineral particles. Therefore, the glittering pigment particles are easily incorporated into the three-dimensional structure of the house-of-cards structure of the clay mineral particles. Therefore, the precipitation of the glittering pigment in the liquid cosmetic is easily suppressed, and the glittering pigment is easily redispersed.

[0035] The average particle size of the photoluminescent pigment in this specification is a value measured by a method in which the photoluminescent pigment is photographed using a digital microscope VHX7100 (manufactured by Keyence Corporation), the major axis (the distance between the two most distant points on the pigment's contour line) of 200 randomly selected particles is measured, and the average of the major axes is calculated. The average particle size of the clay mineral particles in this specification is a value measured by a scanning electron microscope JSM-6510LA (manufactured by JEOL Ltd.) of the clay mineral particles, the major axis (the distance between the two most distant points on the pigment's contour line) of 200 randomly selected particles is measured, and the average of the major axes is calculated.

[0036] The above-mentioned 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.

[0037] The above-mentioned copolymers are available, for example, in the form of an emulsion containing emulsion particles of the copolymer.

[0038] The content of the copolymer in the liquid cosmetic (content as solid content) may be 2% by mass or more and 30% by mass or less.

[0039] If the copolymer content is 2% by weight or more, the three-dimensional structure of the copolymer is likely to have the effect of suppressing adhesion and aggregation between glittering pigments due to hydrophobic interactions. Also, if the copolymer content is 2% by weight or more, the viscosity of the liquid cosmetic is not too low, and excessive ejection of the liquid cosmetic is suppressed, for example, when using an applicator described below. If the copolymer content is 30% by weight or less, the viscosity of the liquid cosmetic is not too high, and the liquid cosmetic is likely to be appropriately ejected, for example, when using an applicator described below.

[0040] The above-mentioned copolymer may be a copolymer containing, as monomer units, two or more types selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester.

[0041] Alternatively, the 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.

[0042] In this case, since the liquid cosmetic contains a styrene-acrylic copolymer, the three-dimensional structure of the copolymer containing a styrene group can more effectively suppress adhesion and aggregation due to hydrophobic interactions between the glittering pigments. This makes it possible to better suppress sedimentation and redisperse the glittering pigment. In addition to the alkyl group, carboxy group, or carbonyl group of the copolymer, the charge of the styrene group more effectively reinforces the card house structure formed by the clay mineral particles. This makes it possible to more effectively suppress sedimentation of the glittering pigment and to better redisperse the glittering pigment.

[0043] Examples of commercially available products that can be used as the above-mentioned copolymer include styrene / acrylates copolymers such as DAITOSOL 5000STY (manufactured by Daito Chemical Industry Co., Ltd.) and Yodozole GH41F (manufactured by Nouryon Japan 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, and DAITOSOL 3000VP3 (all manufactured by Daito Chemical Industry Co., Ltd.), Yodozole GH34F, Yodozole GH800F, Yodozole GH800PE, Yodozole GH810F, Yodozole GH256F, DERMACRYL Examples include acrylate copolymers such as AQF (all manufactured by Nouryon Japan Co., Ltd.).

[0044] The above-mentioned hexylene glycol (also known as 2-methylpentane-2,4-diol) is a diol having six carbon atoms.

[0045] Hexylene glycol has two hydroxyl groups for a carbon number of six, so the number of hydroxyl groups relative to the carbon number is not too large. This results in good drying properties for liquid cosmetics. On the other hand, hexylene glycol has six carbon atoms, so the carbon chain is not too long. This results in good solubility in water, and phase separation is unlikely to occur in liquid cosmetics. Hexylene glycol also has a three-dimensional structure with a side chain (methyl group). This three-dimensional structure can incorporate a glittering pigment, so that the precipitation of the glittering pigment can be suppressed. Hexylene glycol also has hydroxyl groups near the center of the structure (the second and fourth carbons). This results in less water retention due to hydrogen bonding compared to other diols with the same carbon number (such as 1,2-hexanediol), and therefore can impart excellent drying properties to liquid cosmetics.

[0046] The content of hexylene glycol in the liquid cosmetic preparation may be 1.0% by mass or more and 4.0% by mass or less.

[0047] If the content of hexylene glycol in the liquid cosmetic is 1.0% by mass or more, the above-mentioned good effect of hexylene glycol in suppressing sedimentation and redispersing the glittering pigment can be obtained, and the drying property of the liquid cosmetic can be made good. Also, if 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, and the coating thickness of the liquid cosmetic can be made thin. Therefore, the quick-drying property of the coating film is easily improved, and the glittering feeling of the drawn lines of the liquid cosmetic is less likely to be impaired. 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, it is easy to obtain a liquid cosmetic that is excellent in suppressing sedimentation and redispersing the glittering pigment, and is less likely to be impaired in the glittering feeling of the drawn lines.

[0048] The water contained in the liquid cosmetic composition described above is the main component and main solvent of the liquid cosmetic composition. As the water, ion-exchanged water, purified water, pure water, or ultrapure water may be used.

[0049] In some embodiments, the liquid cosmetic may further contain a polysaccharide. By containing the polysaccharide in the liquid cosmetic, the glittering pigment can be captured in the network structure of the polysaccharide formed in the liquid cosmetic. Therefore, even if the viscosity of the liquid cosmetic is reduced due to the shear applied to the liquid cosmetic, which causes the card-house structure of the clay mineral particles to collapse, the sedimentation of the glittering pigment can be suppressed.

[0050] The content of the polysaccharide in the liquid cosmetic preparation may be 0.05% by mass or more and 0.30% by mass or less.

[0051] If the content of polysaccharides in the liquid cosmetic is 0.05% by mass or more, the luster pigment is easily captured in the network structure of the polysaccharides, which is resistant to shear, in the liquid cosmetic. Therefore, even if the card house structure of the clay mineral particles is broken by the action of shear and the viscosity of the liquid cosmetic is reduced, the luster pigment can be prevented from settling. Furthermore, if the content of polysaccharides in the liquid cosmetic is 0.30% by mass or less, the viscosity of the liquid cosmetic does not become too high, and the coating thickness of the liquid cosmetic can be easily reduced. This makes it easier to improve the quick-drying property of the coating film and makes it difficult to impair the luster of the lines drawn by the liquid cosmetic. Therefore, by containing 0.05% by mass or more and 0.30% by mass or less of polysaccharides in the liquid cosmetic, it is easy to obtain a liquid cosmetic that is excellent in preventing the luster pigment from settling and redispersing, and is difficult to impair the luster of the lines drawn.

[0052] Specific examples of polysaccharides include xanthan gum, succinoglycan, welan gum, alkasilan, alkasee gum, zeta sea gum, and gellan gum, which are derived from microorganisms, guar gum, psyllium seed gum, tamarind seed gum, tragacanth gum, galactomannan, carrageenan, which is derived from seaweed, and ghatti gum and karaya gum, which are derived from plant resins.

[0053] Xanthan gum is a polysaccharide containing glucose, mannose, and glucuronic acid, which is separated 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, Ketorol CG, Kelzan CG-T, 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, Bistop D-3000-DF, and Bistop D-3000-DF-C (all manufactured by San-Ei Gen F.S.I. Co., Ltd.).

[0054] In some embodiments, the liquid cosmetic may further contain a pigment for coloring the liquid cosmetic.

[0055] As the above-mentioned 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.

[0056] The content of the pigment 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 content of the pigment is 3% by weight or more or 5% by weight or more, the color of the liquid cosmetic is relatively dark, and the function as a cosmetic is good. If the content of the pigment is 30% by weight or less or 20% by weight or less, the dispersibility of the pigment in the liquid cosmetic is good, and color unevenness of the liquid cosmetic is easily suppressed.

[0057] The liquid cosmetic according to some embodiments may contain other ingredients (such as preservatives and pH adjusters) in addition to the above-mentioned components.

[0058] Preservatives refer to substances that have the functions of preservation, preservation enhancement, preservation, antibacterial, antifungal, and antioxidant. Preservatives include phenoxyethanol, pentylene glycol, ethanol, paraoxybenzoic acid ester, 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, 1,2-hexane ... 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), diaminoalkylamides, L-lysine hexadecylamide, citrate heavy metal salts, salicylates, 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, Dimethylol dimethylhydantoin (DMDMH), Chlorhexidine, Sodium salt of hydroxymethyl glycinate, Hydroxyethylglycine of sorbic acid, N-Oleyl hydroxyhexanamide, Phenylphenol and its salts, o-Phenylphenol and its salts, p-Chloro-m-cresol, p-Chlorophenol, Imidazolidinyl urea, Copper usnicate, 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 Speciosa Flower / Leaf / Seed / Stem Extract, Alpinia Speciosa Leaf / Stem Fermentation Product, Elodea Elata Extract, Coriander Leaf Extract, Pomegranate Peel Extract, Santalum Paniculatum Wood Water, Hexamidine Diisethionate, 1,2-Ethanediol, Sodium Citronellate,Siberian 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, Bis-Ethylquinolinium Ethylquinolinidenepentadiene Iodide, Sodium Lauryldiaminoethylglycine, Ethyl Lauroylarginine 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, aridimorph, 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, Dodizin, 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, Alpha-Tocopherol, Delta-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, Achillea Millefolium Extract,Sericin, Thymus vulgaris flower / leaf / stem extract, Thyme extract, Tea extract, Tea leaf extract, Clove extract, Ascorbyl tetrahexyldecanoate, Ascorbyl tetrahexyldecanoate, Calendula officinalis extract, Ascorbyl palmitate phosphate trisodium, Haematococcus pluvialis extract, Haematococcus pluvialis oil, Oenothera biennis seed extract, Oenothera biennis extract, Melissa officinalis extract, Melissa officinalis leaf extract, Magnesium ascorbyl phosphate, Magnesium ascorbyl phosphate, etc., among which 1,2-hexanediol It has been found that the following preservatives 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.

[0059] The content of these preservatives in the liquid cosmetic may be 1.0% by weight or more and 27.0% by weight or less, or 3.0% by weight or more and 22.0% by weight or less, or 6.0% by weight or more and 17.0% by weight or less, based on the total weight of the cosmetic. If the content of the preservatives is 0.1% by weight or more, 3.0% by weight or more, or 6.0% by weight or more, the preservative performance is sufficiently exhibited. If the content is 27.0% by weight or less, 22.0% by weight or less, or 17.0% by weight or less, the skin irritation is tolerable.

[0060] 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, arginine, Ingredients: L-arginine, ammonia, isopropanolamine, formic acid, glyoxylic acid, glycolic acid and its salts, glucuronic acid, zinc glycine, glutaric acid, clay minerals, chloroacid, 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 hydrogen nitrate, tartaric acid, disodium tartrate, potassium tartrate, acetic acid, calcium oxide, magnesium oxide, sodium oxide, etc., of which citric acid, sodium citrate, arginine, L-arginine, potassium hydroxide, sodium hydroxide, phosphoric acid, calcium phosphate, triethanolamine, etc. are known to be less susceptible to changes in pH over the long term and are therefore preferred.These pH adjusters may be used alone or in combination of two or more.

[0061] The content of these pH adjusters in the liquid cosmetic may be 0.01% by weight or more and 3.5% by weight or less, or 0.015% by weight or more and 2.5% by weight or less, or 0.02% by weight or more and 1.8% by weight or less, based on the total amount of the cosmetic. Furthermore, the pH of the liquid cosmetic adjusted by the pH adjuster is preferably 6 to 9. If the pH is within the desired range, the pH becomes 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.

[0062] (Method of manufacturing liquid cosmetics) The liquid cosmetic preparation according to some embodiments can be produced by various conventionally known methods.

[0063] The liquid cosmetic according to some embodiments can be produced, for example, by the following procedure. First, clay mineral particles are added to a part of the water, and the clay mineral dispersion is prepared by processing using a stirrer such as a propeller, homogenizer, or homodisper. Next, the clay mineral dispersion, hexylene glycol, acrylic acid, methacrylic acid, acrylic acid ester, and a copolymer containing at least one selected from methacrylic acid ester as a monomer unit, and a luster pigment are added to the remaining water, and processing is performed using a stirrer such as a propeller, homogenizer, or homodisper. In this way, the liquid cosmetic is obtained. In addition, in these preparation steps, the liquid cosmetic can be stirred and dispersed by applying heat to the liquid cosmetic by using the generated stirring and dispersion heat or a heater, or stirred and dispersed by cooling. Removal of bubbles by a defoamer, filtration of coarse matter by a filter, etc. may be performed as necessary. These various mixing steps, stirring and dispersion steps, filtration steps, heating steps, and cooling steps may each be performed alone, or two or more steps may be performed in parallel.

[0064] (Configuration of applicator)

[0065] The liquid cosmetic of the present invention can be suitably used by being filled in an applicator. The applicator may be an applicator for cosmetics such as eyeliner, eyebrow, 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 uses titanium oxide or a large-diameter plate-shaped glittering pigment, it is preferable to directly store the liquid cosmetic in a fiber bundle called batting, without absorbing it, so that the ink stored in the liquid cosmetic storage chamber is used up, and the ink supply mechanism to the application destination 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 at 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, wide application marks that demonstrate the glitter of the ink can be formed.

[0066] An example of the structure of an applicator is shown in Figure 1. The applicator according to one embodiment includes an applicator section and a liquid storage section that stores the above-mentioned liquid cosmetic, and is configured so that the liquid cosmetic is supplied from the liquid storage section to the applicator section. The applicator shown in FIG. 1 is a brush-type applicator that uses a relatively soft object such as a brush tip as the application tip (application part), has a valve mechanism disposed at the connection between the application tip and a liquid cosmetic storage chamber, and opens and closes the valve mechanism by knocking the rear end, thereby controlling the supply of liquid cosmetic to the application tip. It is a so-called rear-end knock type valve mechanism applicator.

[0067] The applicator shown in Fig. 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.

[0068] The front part of the front barrel 1a is small in diameter to match the diameter of the pen tip, and the rear part is large in diameter to connect with the rear barrel 1b. The inner wall of the small diameter part has vertical ribs 5 evenly arranged around the circumference to support the pen tip. The application tip 2 is designed to pass through a tip opening 6 formed at the tip of the front barrel 1a at least in the knocking state, and at least a part of the application tip 2 is located forward of the tip opening 6. The vertical ribs 5 can break down solidified matter (agglomerates of particles contained in the liquid cosmetic) around the application tip 2 and crush air bubbles contained in the liquid cosmetic, preventing the air bubbles from being discharged toward the tip side of the tip opening 6. In addition, the rear large diameter part of the front barrel 1a has a valve seat member 7 of a valve mechanism that controls the flow of ink. The valve seat member 7 has a central hole 7a that serves as an ink passage at its center, and its peripheral part serves as a valve seat portion that can be circumferentially abutted against a valve rod described later. 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 at all times when the valve rod is not in operation.

[0069] The rear barrel 1b has a rear hole 10 at its rear end, in which the operating part 3 is disposed. A connecting rod 11 that transmits the pushing operation of the operating part 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 material with rubber elasticity and having a soft hinge part 12a. When the operating part 3 is pushed toward the inside of the barrel, it comes into contact with the rear end of the packing member 12, and the packing member 12 receives a pushing force, causing the hinge part 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 to close the valve mechanism.

[0070] An application target connection tube 13 is attached to the front end of the valve rod 8, and a brush-shaped application target 2 is connected to the front end of the application target connection tube 13. Thus, the application target 2 also moves forward in conjunction with the pushing operation of the operating part 3, and when the pushing operation is released, the application target 2 also moves backward due to the elastic force of the coil spring 9. In this way, it is possible to prevent the liquid cosmetic present in the space around the application target 2 from drying and solidifying due to the application of an external force with each operation, and it also assists in discharging the liquid cosmetic. Such a mechanism is particularly effective when using a liquid with a relatively high solid content.

[0071] The inside of the rear shaft 1b is mainly a liquid cosmetic storage chamber (liquid storage section), and a plate-shaped stainless steel stirrer 14 having protrusions for stirring the liquid cosmetic is disposed inside the rear shaft 1b as an internal member. By shaking the applicator, the stirrer 14 moves inside the rear shaft 1b, and the liquid cosmetic stored inside the rear shaft 1b can be stirred. The material of the stirrer is not limited to stainless steel, and resins such as polypropylene and polypropylene containing talc can also be used. The shape of the stirrer is not limited to a plate-like shape with protrusions, and may be rod-like or cylindrical. In addition, by using a transparent or semi-transparent material for the rear shaft, the color of the liquid cosmetic contained therein can be easily visually recognized, and at least a portion of the gap can be narrowed to make it easier to visually recognize the color of the liquid cosmetic and the remaining amount of the liquid cosmetic. In addition, the color of the stirrer 14 can be made black, white, milky white, etc., to make the color of the liquid cosmetic even easier to visually recognize.

[0072] 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. EXAMPLES

[0073] The present invention will now be described in detail with reference to examples.

[0074] (Preparation of liquid cosmetics) Liquid cosmetics of Examples 1 to 10 and Comparative Examples 1 to 7 were prepared, having the compositions shown in the following Tables 1 and 2. Specifically, the following materials were used for each liquid cosmetic shown in Tables 1 and 2. The numerical values ​​for the content of each component in Tables 1 and 2 indicate the ratio (mass %) to the mass of the liquid cosmetic.

[0075] <Brilliant pigments> Luster pigment A: Aluminum pigment (product name: Cosmicolor Metallics Frost Silver, manufactured by Toyo Aluminum Co., Ltd., average particle size: 20 μm) Luminescent pigment B: pearl pigment (product name: FANTASPEARL 0015SR, manufactured by Nihon Koken Kogyo Co., Ltd., average particle size: 9 μm) Luminescent pigment C: Glass flake pigment (product name: DK PEARL-GFIF GREEN, manufactured by Daito Kasei Kogyo Co., Ltd., average particle size: 100 μm) Luminescent pigment D: Glass flake pigment (product name: Metashine RC MT1200RS, manufactured by Nippon Sheet Glass Co., Ltd., average particle size: 200 μm)

[0076] <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)

[0077] <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 Kogyo Co., Ltd., average particle size: 0.080 to 0.100 μm, thickness: approximately 4 nm)

[0078] <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, aqueous dispersion with solid content of 50%, product name: DAITOSOL 5000AD, manufactured by Daito Chemical Industry Co., Ltd.) The copolymer contents (mass %) in Tables 1 and 2 are the contents as solid contents in the liquid cosmetic preparation.

[0079] <Solvent> PVP (Polyvinylpyrrolidone) (Product name: Luvimer 100P, manufactured by BASF Japan Ltd.) Hexylene glycol (product name: HEXYLENEGLYCOL, manufactured by Arkema Co., Ltd.) 1,3-Butylene glycol (product name: High Sugar Cane BG, manufactured by Kokyu Alcohol Kogyo Co., Ltd.) 1,2-Hexanediol (product name: OPTIPHEN HD, manufactured by Ashland Japan Co., Ltd.)

[0080] <Polysaccharides> Xanthan gum (product name: KELTROL CG-T, manufactured by Sansho Co., Ltd.)

[0081] The liquid cosmetics of each Example and Comparative Example were prepared as follows. First, clay mineral particles were added to a portion of the water, and the mixture was processed using a stirrer to prepare a clay mineral dispersion. Next, the clay mineral dispersion, hexylene glycol, copolymer, and luster pigment were added to the remaining water, and the mixture was stirred using a stirrer. In this manner, the liquid cosmetics of each Example and Comparative Example were obtained.

[0082] The results of measuring the viscosity of the obtained liquid cosmetic preparations are shown in Tables 1 and 2. The viscosity of each liquid cosmetic preparation was obtained by measuring the flow curve with a rheometer MCR302 (manufactured by Anton Paar Japan Co., Ltd.). The jig was a φ50 mm cone plate, and the shear viscosity was measured at a shear rate of 76.6 (1 / s) and a temperature of 25°C.

[0083] (Evaluation method) The liquid cosmetic compositions of each Example and Comparative Example were evaluated for sedimentation state, redispersibility, drying property, and glittering feeling. The evaluation methods and evaluation criteria for each evaluation item are as follows. The evaluation results are shown in Tables 1 and 2.

[0084] <Subsidence state> A sample of each liquid cosmetic was placed in a glass tube and left to stand for one month in an environment of 40°C. After that, the state of settling of the glittering pigment was visually confirmed and evaluated according to the following evaluation criteria. [Evaluation Criteria] A: The glittering powder can be visually confirmed throughout 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 seen at the bottom of the liquid.

[0085] <Redispersibility> A sample of each liquid cosmetic was placed in a glass tube and left to stand in an environment of 40°C for one month, after which the sample was shaken by hand for 3 seconds (redispersion 1) and 10 seconds (redispersion 2) and the redispersibility was visually confirmed. [Evaluation Criteria] A: When you shake it, all the lumps of glittering powder at the bottom break apart immediately and the glittering powder can be visually confirmed throughout. B: After shaking for 10 seconds, all the lumps of glittering powder at the bottom break up and the glittering powder can be visually confirmed throughout. C: The lustrous powder lumps at the bottom are slightly loosened, but the lumps are not completely eliminated. D: The lumps of glittering powder at the bottom did not break down at all, and there was no change from before shaking.

[0086] <Drying> Each liquid cosmetic 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 it took for the glittering pigment to no longer stick to the finger when touched was recorded, and the drying properties were evaluated according to the following evaluation criteria. [Evaluation Criteria] A: Within 30 seconds B:31 seconds~60 seconds C: 61 seconds ~ 90 seconds D: 91 seconds or more

[0087] <Shining feeling> Each liquid cosmetic filled in the applicator shown in FIG. 1 was applied to the back of the hand in three lines, each 2 mm wide and 4 cm long, using the applicator. The sense of brilliance when applied was visually confirmed and evaluated according to the following evaluation criteria. [Evaluation Criteria] A: Very high brightness. B: High brilliance. C: Low brilliance. D: Almost no shine.

[0088] [Table 1]

[0089] [Table 2]

[0090] (Evaluation Results) The liquid cosmetics of Examples 1 to 10 were rated A or B in all the evaluation items of sedimentation state, re-dispersion 1, re-dispersion 2, dryness and radiance. In contrast, the liquid cosmetics of Comparative Examples 1 to 7, which do not contain at least any one of clay mineral particles, the above-mentioned copolymer (a copolymer containing at least one type selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester as a monomer unit), 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 the dryness and radiance. From this, it was found that the liquid cosmetic preparation according to the embodiment of the present invention has excellent sedimentation suppression and redispersibility of the glittering pigment, and also has excellent drying properties and is less likely to impair the glittering feel of drawn lines.

[0091] Furthermore, when comparing Examples 1 and 2, which contain a styrene-acrylic copolymer (i.e., a copolymer containing at least one selected from acrylic acid, methacrylic acid, acrylic acid esters, and methacrylic acid esters, and styrene as monomer units), with Example 3, which contains an acrylic copolymer that does not contain styrene (i.e., a copolymer containing two or more selected from acrylic acid, methacrylic acid, acrylic acid esters, and methacrylic acid esters as monomer units), the liquid cosmetics of Examples 1 and 2 showed better results in the 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.

[0092] Furthermore, when comparing Examples 1 and 2, in which the hexylene glycol content is within the range of 1.0 mass% or more and 4.0 mass% or less, with Examples 7 and 8, in which the hexylene glycol content is outside that range, the liquid cosmetics of Examples 1 and 2 gave 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 be within the range of 1.0 mass % or more and 4.0 mass % or less, settling of the glittering pigment can be effectively suppressed, or the redispersibility of the glittering pigment can be improved.

[0093] Furthermore, when comparing Examples 1 and 2, in which the polysaccharide (xanthan gum) content is within the range of 0.05% 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 that range, the liquid cosmetics of Examples 1 and 2 gave better results in terms of sedimentation state and re-dispersion 1. This shows that by setting the polysaccharide content in the liquid cosmetic to be within the range of 0.05% by mass or more and 0.30% by mass or less, settling of the glittering pigment can be effectively suppressed, or the redispersibility of the glittering pigment can be improved.

[0094] In addition, the average particle diameter r of the glitter pigment P is 10 μm or more and 150 μm or less, and the average particle diameter r of the clay mineral particles is C The average particle diameter r of the bright pigment is 0.250 μm or more and 0.550 μm or less in Examples 1 and 2. P When compared with Examples 9 and 10, which are outside the range, the liquid cosmetics of Examples 1 and 2 obtained better results in terms of sedimentation state and re-dispersion 1. From this, the average particle diameter r P is 10 μm or more and 150 μm or less, and the average particle diameter r of the clay mineral particles is C It can be seen that by making the particle size 0.250 μm or more and 0.550 μm or less, settling of the bright pigment can be effectively suppressed, or the redispersibility of the bright pigment can be improved.

[0095] As described above, it is clear that the liquid cosmetic preparations according to the examples of the present invention are excellent in terms of suppressing sedimentation of the glitter pigment and redispersibility, and are also capable of preventing the glittering of drawn lines from being impaired.

[0096] The contents described in each of the above embodiments can be understood, for example, as follows.

[0097] (1) A liquid cosmetic preparation according to at least one embodiment of the present invention comprises: A photoluminescent pigment; Clay mineral particles; A copolymer including, as a monomer unit, at least one selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester; Hexylene glycol, Water, Contains:

[0098] In the above configuration (1), since the liquid cosmetic contains clay mineral particles, a three-dimensional house-of-cards structure of the clay mineral particles is formed in the liquid cosmetic, and the glittering pigment is captured in this house-of-cards structure, which inhibits the settling of the glittering pigment and inhibits adhesion and aggregation between the glittering pigments due to hydrophobic interactions, improving the redispersibility of the glittering pigment in the liquid cosmetic. In the above configuration (1), the liquid cosmetic contains a copolymer containing at least one monomer unit selected from acrylic acid, methacrylic acid, acrylic acid esters, and methacrylic acid esters (i.e., an acrylic copolymer; hereinafter, simply referred to as a copolymer), and the three-dimensional structure of the copolymer effectively prevents adhesion and aggregation between the glittering pigments due to hydrophobic interactions, thereby improving the prevention of sedimentation and redispersibility of the glittering pigments. In the above configuration (1), the liquid cosmetic contains the above-mentioned copolymer and hexylene glycol, so that a three-dimensional structure is formed by hydrogen bonds between the carboxyl group or carbonyl group of the copolymer and the hydroxyl group of the hexylene glycol. This three-dimensional structure effectively prevents adhesion and aggregation caused by hydrophobic interactions between the glittering pigments. This leads to better inhibition of sedimentation and redispersibility of the glittering pigment. In the above configuration (1), the liquid cosmetic contains the copolymer, and the charge of the alkyl group, carboxy group, carbonyl group, etc. of the copolymer reinforces the house-of-cards structure formed by the clay mineral particles. That is, even if the house-of-cards structure of the clay mineral particles tries to collapse, the charge of the functional group of the copolymer and the charge on the surface of the clay mineral particles interact with each other, so that the house-of-cards structure of the clay mineral particles is likely to be maintained. As a result, the settling of the luster pigment is effectively suppressed, and the redispersibility of the luster pigment is improved. In addition, in the above configuration (1), since the liquid cosmetic contains hexylene glycol, it is possible to impart excellent drying properties to the liquid cosmetic. As a result, the lines drawn by application of 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. In the above configuration (1), the liquid cosmetic contains hexylene glycol, which, as described above, contributes to suppression of settling of the glittering pigment in the liquid cosmetic. This allows the content of thickeners such as polysaccharides used for the purpose of suppressing settling of the glittering pigment to be reduced, and the viscosity of the liquid cosmetic can be reduced accordingly. This allows the coating thickness of the liquid cosmetic to be reduced, which improves the quick-drying property of the coating and makes it difficult for the glittering feeling of the lines drawn by the liquid cosmetic to be impaired. As described above, according to the above-mentioned (1), it is possible to obtain a liquid cosmetic preparation which is excellent in suppressing sedimentation of the glitter pigment and in redispersibility, and in which the glitter of the drawn lines is not easily impaired.

[0099] (2) In some embodiments, in the configuration of (1) above, The 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.

[0100] In the above-mentioned (2) configuration, the copolymer (acrylic copolymer) is a styrene-acrylic copolymer containing styrene as a monomer unit. Therefore, the three-dimensional structure of the copolymer containing a styrene group can more effectively suppress adhesion and aggregation due to hydrophobic interaction between the glittering pigments. Therefore, the glittering pigment can be more effectively inhibited from settling and redispersed. In addition to the alkyl group, carboxy group, or carbonyl group of the above-mentioned copolymer, the charge of the styrene group more effectively reinforces the card house structure formed by the clay mineral particles. Therefore, the glittering pigment can be more effectively inhibited from settling and the glittering pigment can be more effectively redispersed. Therefore, according to the above-mentioned (2) configuration, the glittering pigment can be more effectively inhibited from settling and redispersed.

[0101] (3) In some embodiments, in the configuration of (1) or (2), The liquid cosmetic is Further containing polysaccharides, The content of the polysaccharide in the liquid cosmetic is 0.05% by mass or more and 0.30% by mass or less.

[0102] In the above configuration (3), the polysaccharide content in the liquid cosmetic is 0.05% by mass or more, so that the luster pigment is easily captured in the network structure of the polysaccharide, which is resistant to shear, in the liquid cosmetic. Therefore, even if the card-house structure of the clay mineral particles is broken by the action of shear and the viscosity of the liquid cosmetic decreases, the luster pigment can be prevented from settling. In addition, in the above configuration (3), the polysaccharide content in the liquid cosmetic is 0.30% by mass or less, so that the coating thickness of the liquid cosmetic can be easily reduced. This makes it easier to improve the quick-drying property of the coating film, and makes it difficult for the luster of the drawn lines of the liquid cosmetic to be impaired. Therefore, according to the above configuration (3), it is easy to obtain a liquid cosmetic that is excellent in the inhibition of settling and redispersibility of the luster pigment, and is difficult for the luster of the drawn lines to be impaired.

[0103] (4) In some embodiments, in any one of the configurations (1) to (3) above, The content of hexylene glycol in the liquid cosmetic is 1.0% by mass or more and 4.0% by mass or less.

[0104] In the above configuration (4), the content of hexylene glycol in the liquid cosmetic is 1.0% by mass or more, so that the above-mentioned effects of hexylene glycol in inhibiting sedimentation of the glittering pigment and in improving redispersibility can be obtained, and the drying properties of the liquid cosmetic can be improved. In addition, in the above configuration (4), the content of hexylene glycol in the liquid cosmetic is 4.0% by mass or less, so that the viscosity of the liquid cosmetic is not too high, and the coating thickness of the liquid cosmetic can be made thin. This makes it easier to improve the quick-drying properties of the coating film, and makes it easier to prevent the glittering of the lines drawn by the liquid cosmetic from being impaired. Therefore, according to the above configuration (4), it is easier to obtain a liquid cosmetic that is excellent in inhibiting sedimentation of the glittering pigment and in improving redispersibility, and that is easier to prevent the glittering of the lines drawn.

[0105] (5) In some embodiments, in any one of the configurations (1) to (4) above, The average particle diameter r of the glitter pigment P The average particle diameter r of the clay mineral particles C Ratio of C / r P is greater than or equal to 0.0016 and less than or equal to 0.055.

[0106] According to the above configuration (5), the average particle diameter r P Average particle size of clay mineral particles r C Ratio of C / r P Since the average particle diameter r of the luster pigment is 0.0016 or more, the size of the clay mineral particles is somewhat larger than that of the luster pigment. Therefore, the luster pigment is less likely to settle by avoiding the house-of-cards structure of the clay mineral particles. In addition, according to the above configuration (5), the average particle diameter r of the luster pigment is P Average particle size of clay mineral particles r C Ratio of C / r Pis 0.055 or less, the weight per particle of the glittering pigment is not too large relative to the clay mineral particles. Therefore, the glittering 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 the settling of the glittering pigment in the liquid cosmetic, and also makes it easy to improve the redispersibility of the glittering pigment. Thus, according to the above configuration (6), it is easy to obtain a liquid cosmetic that is excellent in suppressing the settling of the glittering pigment and in redispersibility, and that is less likely to impair the glittering feel of the drawn lines.

[0107] (6) In some embodiments, in any of the configurations (1) to (5) above, The average particle diameter r of the glitter pigment P is 10 μm or more and 150 μm or less, The average particle diameter r of the clay mineral particles C is not less than 0.250 μm and not more than 0.550 μm.

[0108] In the above configuration (6), the average particle diameter r P is 10 μm or more, and the average particle diameter r of the clay mineral particles is 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-cards structure of the clay mineral particles and the three-dimensional structure of the copolymer and hexylene glycol, and the luster of the luster pigment is easily obtained. In addition, in the above configuration (6), the average particle diameter r P is 150 μm or less, the weight per particle of the glittering pigment is not too large. Therefore, the glittering pigment particles are easily incorporated into the house-of-cards structure of the clay mineral particles and the three-dimensional structure of the copolymer and hexylene glycol. Therefore, the glittering pigment is easily prevented from settling in the liquid cosmetic, and the glittering pigment is easily redispersible. Therefore, according to the above-mentioned (6), it is easy to obtain a liquid cosmetic that is excellent in preventing the glittering pigment from settling and in redispersibility, and that is less likely to impair the glittering feel of the drawn lines.

[0109] (7) 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 according to any one of (1) to (6) above, The liquid cosmetic is configured to be supplied from the liquid storage section to the application section.

[0110] In the above configuration (7), the applicator has an applicator section to which the liquid cosmetic material described in any one of the above configurations (1) to (6) is supplied. Thus, the above configuration (7) provides an applicator capable of discharging a liquid cosmetic material that is excellent in suppressing settling of the glittering pigment and in redispersibility, and that is unlikely to impair the glittering feel of the drawn lines.

[0111] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and also includes modifications to the above-described embodiments and appropriate combinations of these modifications.

[0112] In this specification, expressions expressing relative or absolute configuration, such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial," do not only strictly represent such a configuration, but also represent 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 indicating that things are in an equal state, such as "identical," "equal," and "homogeneous," 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 describing shapes such as a rectangular shape or a cylindrical shape do not only refer to shapes such as a rectangular shape or a cylindrical shape in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect is obtained. In addition, in this specification, the expressions "comprise," "include," or "have" a certain element are not exclusive expressions that exclude the presence of other elements. [Explanation of symbols]

[0113] 1 shaft cylinder 1a front axle 1b rear axle 2. Coating destination 3 Control section 4 Cap 5 Vertical ribs 6 Tip opening 7 Valve seat material 7a Center hole 8 Bento 9 Coil spring 10 Posterior foramen 11 Connecting rod 12 Packing material 12a Hinge part 13 Application destination connection pipe 14 Agitator

Claims

1. A photoluminescent pigment; Clay mineral particles; A copolymer including at least one monomer unit selected from acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester; Hexylene glycol, Water, A liquid cosmetic comprising:

2. The 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 preparation according to claim 1.

3. Further containing polysaccharides, The content of the polysaccharide in the liquid cosmetic is 0.05% by mass or more and 0.30% by mass or less. The liquid cosmetic preparation according to claim 1 or 2.

4. 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 preparation according to claim 1 or 2.

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

6. The average particle diameter r of the glitter 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 preparation according to claim 1 or 2.

7. An application unit; A liquid storage section that stores the liquid cosmetic material 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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