Aqueous liquid cosmetic

Abstract

To provide an aqueous liquid cosmetic that can be preferably built in an applicator such as a direct-liquid-type eye liner, an eye shadow and an eyebrow liner for drawing a line on an eyebrow, which is equipped with a coating part having a cosmetic brush, by suppressing sedimentation of tabular pigment exerting brightness, and is capable of writing a drawing line with constant hue and brilliant feel also with time.SOLUTION: An aqueous liquid cosmetic contains at least: (a) 0.01 to 10 mass% of tabular pigment on the surface of which a compound selected from the following group A is coated; (b) at least one kind of chromatic color pigment having an average particle diameter measured by dynamic light scattering method of 0.01 to 1 μm; (c) 1 to 20 mass% of acrylic copolymer at a solid content amount; and (d) water, where the cosmetic is built in an applicator having a coating part composed of a cosmetic brush. Group A: cellulose, hemicellulose, lignin, chitin, and chitosan.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an aqueous liquid cosmetic preparation containing a plate-like pigment that exhibits glittering properties, and more specifically, to an aqueous liquid cosmetic preparation that can be suitably used in applicators such as direct-dispensing eyeliner, eyeshadow, and eyebrow liners for drawing eyebrow lines, by suppressing sedimentation of the plate-like pigment. [Background technology]

[0002] Conventionally, aqueous liquid cosmetics intended to form a glittering coating on the surface to which they are applied, such as the skin or eyebrows, have generally contained a plate-like pigment (glaring pigment) that exhibits glittering properties. However, this plate-like pigment is prone to settling, and once it settles and forms a layered hard cake, the layered structure is difficult to peel off again, and it is difficult to redisperse in liquid. As a result, the luster pigment overlaps even when drawing lines, and it is not possible to achieve a sense of brilliance commensurate with the amount blended.

[0003] In order to solve the above problems, for example, a method of increasing the viscosity of the vehicle to prevent the formation of a hard cake of the layered plate-like pigment is known. However, this method has problems such as limitations on the ejection means and its structure.

[0004] On the other hand, when looking at the patent documents of water-based liquid cosmetics containing plate-like pigments and applicators thereof, for example, 1) In order to provide an aqueous cosmetic composition that has high brightness and can be used as a brush-type eyeliner, the aqueous cosmetic composition comprises: (a) a glittering pigment having an average particle size of 10 to 100 μm; (b) an acrylic resin emulsion; and (c) a thickener selected from the group consisting of silica, clay minerals, palmitoyl dipeptide, cellulose, cellulose nanofiber, and xanthan gum, wherein the content of component (c) in the aqueous cosmetic composition is 0.1 to 0.35% by mass and the aqueous cosmetic composition has a viscosity at 25° C. of 5 to 30 mPa s (see, for example, Patent Document 1).

[0005] 2) A water-based eyeliner composition which combines and formulates a glittering pigment, carbon black, a polysaccharide derived from a microorganism, a volatile alcohol, and an alkyl acrylate copolymer emulsion in order to provide a water-based eyeliner composition which has excellent abrasion resistance, vivid coloring, a smooth writing feel, and good storage stability (see, for example, Patent Document 2).

[0006] 3) In order to provide an aqueous makeup cosmetic which spreads smoothly, has excellent color development and glossiness, has a high cosmetic effect, adheres well to the skin, has excellent cosmetic durability, and also has excellent storage stability, the aqueous makeup cosmetic contains (A) an aqueous alkali-thickening polymer emulsion, (B) a pigment, (C) a glittering powder, (D) an ethanol-soluble film-forming agent, and (E) an alkali, and contains at least carbon black as component (B) (see, for example, Patent Document 3).

[0007] 4) In order to provide a liquid cosmetic composition that contains a small amount of a plate-like pigment having glittering properties and can be easily applied to a surface to be treated such as the skin without overlapping the plate-like pigment, a liquid cosmetic composition (see, for example, Patent Document 4) is known that contains 0.01 to 10 mass % of a plate-like pigment whose surface is coated with at least a compound selected from the group consisting of cellulose, hemicellulose, lignin, chitin, and chitosan, 0.05 to 5 mass % of layered clay mineral particles, 1 to 20 mass % of an acrylic copolymer in terms of solid content, and water, and is filled into an applicator equipped with an application part having a brush.

[0008] However, in the aqueous liquid cosmetics containing the plate-like pigments described in Patent Documents 1 to 4, At present, when pigments or layered clay minerals are blended to improve color, etc., there are still problems such as impairing the brilliance of plate-shaped pigments. In addition, when plate-shaped pigments are present on a line while overlapping each other, there are problems such as reducing the brilliance, and further, when they form a structure with other blended pigments and become a layered hard cake, it may be difficult to redisperse in the liquid. This causes problems such as preventing the pigment from being discharged, and not being able to achieve color development or brilliance commensurate with the blended amount. Furthermore, when the aqueous liquid cosmetics of Patent Documents 1 to 3 are loaded (filled) into a direct-liquid type eyeliner, eyeshadow, etc. equipped with an application part having a brush tip, there are still problems such as insufficient discharge and poor writing (application) properties. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2022-131500 A (Claims, Examples, etc.) [Patent Document 2] JP 2007-153744 A (Claims, Examples, etc.) [Patent Document 3] JP 2017-114803 A (Claims, Examples, etc.) [Patent Document 4] JP 2021-14412 A (Claims, Examples, etc.) Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been made in view of the above-mentioned conventional problems and the current situation, and aims to solve these problems, and to provide an aqueous liquid cosmetic which, by suppressing settling of plate-like pigments that exhibit brilliance, can be suitably mounted on applicators such as direct-flow eyeliners, eyeshadows, and eyebrow applicators that are equipped with an applicator part having a brush tip, and which enables the drawing of lines that remain constant in hue and brilliance even over time. [Means for solving the problem]

[0011] As a result of extensive investigation into the above-mentioned problems in the prior art, the inventors have discovered that the above-mentioned intended aqueous liquid cosmetic preparation can be obtained by incorporating at least a predetermined amount of a plate-like pigment having a surface coated with a compound with specific physical properties, a chromatic pigment with a particle size within a specific range, and predetermined amounts of an acrylic copolymer and water, and by mounting the components on an applicator equipped with an applicator part composed of a brush, thereby completing the present invention.

[0012] That is, the aqueous liquid cosmetic of the present invention is characterized in that it contains at least (a) 0.01 to 10 mass % of a plate-like pigment having a surface coated with a compound selected from Group A below, (b) at least one chromatic pigment having an average particle size of 0.01 to 1 μm as measured by dynamic light scattering, (c) 1 to 20 mass % in terms of solid content of an acrylic copolymer, and (d) water, and is mounted on an applicator having an application part composed of a brush. Group A: Cellulose, hemicellulose, lignin, chitin, chitosan The aqueous liquid cosmetic preferably further contains a thickener. The thickener is preferably a dextrin and / or a thickening polysaccharide. The aqueous liquid cosmetic composition was applied at 25° C. and a shear rate of 191.5 s -1 It is preferable that the viscosity measured by is 15.0 mPa·s or less. Effect of the Invention

[0013] According to the present invention, by suppressing the settling of plate-like pigments that exhibit brilliance, an aqueous liquid cosmetic is provided which can be suitably mounted on applicators such as direct-flow eyeliners, eyeshadows, and eyebrow applicators that draw lines on eyebrows and which are equipped with an applicator part having a brush tip, and which enables the drawing of lines that maintain a constant hue and brilliance over time. The objects and advantages of the invention will be realized and obtained by means of the elements and combinations particularly pointed out in the claims. Both the foregoing general description and the following detailed description are exemplary and explanatory but are not restrictive of the invention as claimed. [Brief description of the drawings]

[0014] [Figure 1] 1(a) and 1(b) are a perspective view and a longitudinal sectional view of an applicator having an applicator part composed of a brush tip, showing one embodiment of an applicator filled with an aqueous liquid cosmetic preparation of the present invention. [Diagram 2] 1(a) and (b) are drawings showing an example of a pen-type applicator part used in a comparative example, where (a) is a front view and (b) is a cross-sectional view taken along line XX in (a). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The following describes in detail the embodiments of the present invention. However, it should be noted that the technical scope of the present invention is not limited to the embodiments described in detail below, but extends to the inventions described in the claims and their equivalents. The present invention can be implemented based on the contents disclosed in this specification and common technical knowledge in the relevant field (including design matters and obvious matters). The aqueous liquid cosmetic of the present invention contains at least (a) 0.01 to 10 mass % of a plate-like pigment having a surface coated with a compound selected from Group A below, (b) at least one chromatic pigment having an average particle size of 0.01 to 1 μm as measured by dynamic light scattering, (c) 1 to 20 mass % in terms of solid content of an acrylic copolymer, and (d) water, and is characterized in that it is mounted on an applicator having an application part composed of a brush. Group A: Cellulose, hemicellulose, lignin, chitin, chitosan

[0016] The plate-like pigment used in the present invention is a plate-like pigment having luster and having a surface coated with at least a compound selected from the above Group A, and examples of the plate-like pigment include pearl pigments, aluminum flake pigments (aluminum powder pigments), metal or metal oxide coated glass flakes, and aluminum coated polyester films, which are coated with at least a compound selected from the above Group A.

[0017] The compound selected from Group A in the present invention can be at least one selected from the polymers cellulose (oxidized cellulose, fermented cellulose, etc.), hemicellulose, lignin, chitin, and chitosan (either alone or in combination of two or more, the same applies below). Methods for coating the surface of the plate-like pigment with this compound include, for example, 1) a method in which at least one compound selected from Group A is mixed with the plate-like pigment to produce an aqueous slurry, which is then spray-dried using a spray dryer to adhere the compound selected from Group A to the surface of the plate-like pigment (hereinafter referred to as "Production Method 1"); and 2) a method in which a substance that is soluble in an acidic or basic aqueous solution is dissolved in water by adjusting the pH, and the pH is changed to the direction of insolubilization with an acid or a base, thereby precipitating at least one compound selected from Group A on the surface of the plate-like pigment (hereinafter referred to as "Production Method 2"). If the surface coating amount of the compound selected from the above group A is too small, the effect of redispersibility due to hard cake suppression cannot be obtained, while if it is too large, not only does the pearly feeling (luster) decrease, but the pearl surface becomes surface contact instead of point contact, and the effect of redispersibility cannot be obtained. Therefore, it is desirable that the surface coating amount of the compound selected from the above group A is 0.1 to 10%, preferably 0.5 to 8%, and more preferably 1 to 7%, as the surface coating rate of the plate-like pigment (calculated from the mass % at the time of surface treatment).

[0018] Specific examples of the plate-like pigments that can be used include commercially available aluminum flake pigments, metal oxide-coated glass flakes (product name "Metashine", etc.), and metal oxide-coated mica (product name "Lumina", etc.) that have been surface-coated with a compound selected from Group A above, and also commercially available plate-like pigments with a surface coated with a compound selected from Group A above can be used. Regarding the particle size of the smooth surface of the coated plate-like pigment used, the larger the particle size, the higher the sense of brilliance, but in order to optimally exert the effects of the present invention, it is preferable that the particle size is about 5 μm to 100 μm. In the present invention (including the examples), the "particle size" or the "average particle size" described later refers to a value measured and calculated by a dynamic light scattering method (Particle Size Analyzer FPAR-1000, manufactured by Otsuka Electronics Co., Ltd.) or a D50 value calculated on a volume basis using a particle size distribution analyzer HR9320-X100 (manufactured by Nikkiso Co., Ltd.). When the plate-like pigment coated with the compound selected from Group A obtained above for use in the present invention is observed under an electron microscope (×35,000), crystals of the compound can be confirmed on the surface. In the present invention, a method for distinguishing between a plate-like pigment whose surface is coated with a compound selected from Group A above and an uncoated plate-like pigment is that a system containing an uncoated plate-like pigment does not provide redispersibility, whereas a system in which a compound selected from Group A above is used to coat the surface of the plate-like particles provides good redispersibility.

[0019] In the present invention, the content of the plate-like pigment coated with a compound selected from Group A above is preferably 0.01 to 10% by mass (hereinafter, "% by mass" will be simply referred to as "%") relative to the total amount of the aqueous liquid cosmetic in order to obtain sufficient brilliance and hiding power when the product is used, and more preferably 0.5 to 5%. If the content of the coated plate-like pigment is less than 0.01%, the luster is poor, while if it exceeds 10%, the high concentration of the plate-like pigment inevitably increases the luster and becomes expensive, which makes the purpose of the present invention weaker, and is also undesirable because the coating process tends to deteriorate the coating properties or cause coating defects. Note that the formation of hard cakes is promoted in the case of untreated plate-like pigments.

[0020] The component (b) used in the present invention is at least one chromatic pigment having an average particle size of 0.01 to 1 μm, preferably 0.05 to 0.8 μm, as measured by dynamic light scattering. If the average particle size of the chromatic pigment is less than 0.01 μm, a hard cake is formed, resulting in poor redispersibility, whereas if it exceeds 1 μm, the chromatic pigment settles, resulting in poorer upper and lower hue differences. As the chromatic pigment that can be used, both inorganic and organic color pigments can be used. The shape and particle structure of the color pigment that provides these chromatic colors are not particularly limited as long as they are generally used in the field of cosmetics.

[0021] Examples of inorganic coloring pigments include inorganic white pigments such as titanium oxide and zinc oxide; inorganic red pigments such as iron oxide, iron hydroxide, and iron titanate; inorganic brown pigments such as γ-iron oxide; inorganic yellow pigments such as yellow iron oxide and ocher; inorganic black pigments such as black iron oxide and carbon black; inorganic purple pigments such as manganese violet and cobalt violet; inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide, and cobalt titanate; and inorganic blue pigments such as iron blue and ultramarine. Examples of organic color pigments include Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 228, Red No. 405, Orange No. 203, Yellow No. 205, Yellow No. 4, Yellow No. 5, Blue No. 1, Blue No. 404, etc.; water-soluble dye lakes such as Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3, and Blue No. 1 (zirconium lake, barium lake, aluminum lake, etc.); natural dyes such as chlorophyll and β-carotene and their lakes.

[0022] These chromatic pigments having a given particle size may be used alone or in combination of two or more kinds. The total content of these chromatic pigments having a specific particle size can be appropriately selected depending on the application of the aqueous liquid cosmetic, and is preferably 0.01 to 15% by mass, and more preferably 0.05 to 10% by mass, based on the total amount of the aqueous liquid cosmetic. If the content of these chromatic pigments is excessively high, exceeding 15% by mass, it becomes difficult to eject the liquid, whereas if it is less than 0.01% by mass, the effect of the coloring material may be insufficient.

[0023] The acrylic copolymer of component (d) used in the present invention is used from the viewpoint of further improving adhesion and dispersion stability, and examples thereof include those containing at least one of alkyl acrylate copolymers, acrylates copolymers, ammonium acrylates copolymers, acrylic resin alkanolamine liquids, alkyl acrylate-vinyl acetate copolymers, (alkyl acrylate / octylacrylamide) copolymers, silicone modified acrylic copolymers, and octylamide acrylate-acrylic acid copolymers. In particular, the acrylic copolymer used in the present invention is preferably an acryl alkyl copolymer or an acrylate copolymer, etc., from the viewpoint of further exerting the effects of the present invention and improving the fixing property.

[0024] Examples of alkyl acrylate copolymers that can be used include commercially available products such as DAITOSOL 5000STY, DAITOSOL 5000AD, DAITOSOL 5000SJ, DAITOSOL 4000SJT, DAITOSOL 5500GM, and DAITOSOL 5000PO (all manufactured by Daito Chemical Industry Co., Ltd.), Yodosol GH34F and Yodosol GH800F (all manufactured by Nouryon Japan Co., Ltd.), Vinisol 1086DB, Vinisol 1087FT, Vinisol 1089HT, Vinisol 1012JC, Vinisol 1013JH, Vinisol 2140L, Vinisol 2140LH, Vinisol 1086WP, Vinisol 1087FT, and Vinisol 1089HT (all manufactured by Daido Chemical Industry Co., Ltd.), Luvimer Examples of suitable polyolefin resins include 100P (manufactured by BASF Japan Ltd.), AMPHOMER HC (manufactured by Nouryon Japan Ltd.), SYNTRAN EX149PE, and SYNTRAN 5402 (manufactured by Interpolymer Corporation).

[0025] The content of these acrylic copolymers is preferably 1 to 20% in terms of solid content relative to the total amount of the aqueous liquid cosmetic, and more preferably 3 to 19%. If the content of this acrylic copolymer is less than 1%, the adhesion decreases and the difference in concentration between the top and bottom worsens due to low viscosity, while if it is too high, exceeding 20%, the viscosity becomes too high and it becomes difficult to eject the liquid.

[0026] The aqueous liquid cosmetic composition of the present invention preferably contains a thickener from the standpoints of application property, storage stability, and further suppression of settling of the plate-like pigment described above. As for the thickening agents that can be used, as described below, those that are preferably used in order to make the viscosity of the aqueous liquid cosmetic suitable and to achieve the above-mentioned effects of inclusion are preferably dextrins and / or thickening polysaccharides.

[0027] The dextrins that can be used are generally carbohydrates obtained by hydrolyzing starch or glycogen to lower molecular weight. The dextrins can have a molecular structure in which α-glucose is polymerized through α-(1→4) or α-(1→6) glycosidic bonds. In the present invention, "dextrins" means dextrins selected from the group consisting of acyclic dextrins in which α-glucose units are bonded in a linear or branched chain, cyclic dextrins in which α-glucose units are bonded in a ring, and mixtures thereof.

[0028] As the acyclic dextrin, a dextrose equivalent (DE value) of more than 0, 1 or more, 3 or more, 5 or more, 7 or more, or 10 or more and less than 100, 80 or less, 60 or less, 40 or less, 30 or less, 20 or less, 17 or less, or 15 or less can be used. As the cyclic dextrin, a cyclic dextrin having 5 or more, 6 or more, or 7 or more glucose units in the molecule and 20 or less, 15 or less, or 10 or less glucose units can be used. Examples of such cyclic dextrins that can be used include unsubstituted cyclic dextrins such as α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin, and substituted cyclic dextrins such as hydroxypropylated β-cyclodextrin and maltosylcyclodextrin. Examples of dextrins that can be used include commercially available products such as 103 Dextrin (manufactured by Tokai Dextrin Co., Ltd.) and Celldex SL-20 (manufactured by Nihon Shokuhin Kako Co., Ltd.).

[0029] Examples of usable thickening polysaccharides include xanthan gum, succinoglycan, guar gum, casein, gum arabic, gelatin, amylose, agarose, agaropectin, arabinan, curdlan, callose, carboxymethyl starch, chitin, chitosan, quince seed, glucomannan, gellan gum, tamarind seed gum, diutan gum, dextran, nigeran, hyaluronic acid, pustulan, funoran, pectin, porphyran, laminaran, lichenan, carrageenan, alginic acid, tragacanth gum, alkaloid gum, and locust bean gum. Of these, xanthan gum, succinoglycan, and diutan gum are preferred. Commercially available products include, for example, xanthan gum (KELZAN AR; manufactured by Sansho Co., Ltd.), succinoglycan (Rheozan SH; manufactured by Solvay Co., Ltd.), and diutan gum (KELCO-VIS DG-F; manufactured by Sansho Co., Ltd.). The thickening polysaccharides may be used alone or in combination of two or more kinds.

[0030] The content of each of the above-mentioned thickeners in the present invention may be any content that can achieve the effects of the present invention by adjusting the viscosity of the aqueous liquid cosmetic to a suitable range, as described below, and is adjusted to a suitable amount relative to the total amount of the aqueous liquid cosmetic.

[0031] The aqueous liquid cosmetic preparation of the present invention is prepared by adding the above-mentioned components and the remainder being water (purified water, ion-exchanged water, distilled water, pure water, etc.) as a solvent. Furthermore, the aqueous liquid cosmetic preparation of the present invention may contain, as appropriate, moisturizing agents, antibacterial agents, antifoaming agents, inorganic or organic pigments, crystalline cellulose, clay minerals, surfactants, water-soluble organic solvents, and the like, as long as they do not interfere with the dispersion system and do not impair the effects of the present invention. Examples of usable moisturizers include water-soluble glycols such as 1,3-butylene glycol, 1,4-butylene glycol, pentylene glycol, ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, and glycerin. The content of these moisturizing agents is preferably within a range of 1 to 30%, and more preferably 5 to 20%, based on the total amount of the composition.

[0032] Examples of antibacterial agents that can be used include parabens, sodium dehydroacetate, phenoxyethanol, etc. The antibacterial agent of the present invention contains a preservative, and examples of the parabens that are preservatives include methyl paraoxybenzoate, ethyl paraoxybenzoate, propyl paraoxybenzoate, butyl paraoxybenzoate, isopropyl paraoxybenzoate, etc. that can be used in appropriate amounts. In addition, examples of antifoaming agents that can be used include polydimethylsiloxane (simethicone). This polydimethylsiloxane is a silicone oil consisting of a mixture of linear siloxane polymers whose ends are blocked and methylated with trimethylsiloxy units, and a suitable amount of a commercially available product such as KS-66 (manufactured by Shin-Etsu Silicone Co., Ltd.) can be used.

[0033] In the present invention, in order to obtain even more vivid color development, in addition to the above-mentioned coated plate-like pigment and chromatic pigment having a specified particle size, a dye can be blended to an extent that does not impair the effects of the present invention, thereby making the color tone even more vivid. In addition, in the present invention, from the viewpoint of suppressing skin irritation, the pH of the aqueous liquid cosmetic is preferably in the range of 6 to 9. The pH can be adjusted using a pH adjuster such as 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, triethanolamine, L-arginine, aqueous ammonia, or sodium hydroxide, and it is particularly preferable to adjust the pH with 2-amino-2-methyl-1-propanol.

[0034] In addition, if the viscosity of the aqueous liquid cosmetic composition of the present invention is too high, it will not be discharged from the brush tip, and if it is too low, the lines drawn will bleed, making it difficult to use. -1 It is desirable that the viscosity at this time is 15 mPa·s or less, and preferably in the range of 2 to 10 mPa·s. By ensuring that each viscosity falls within the above ranges, the flow rate is ensured, lines are easily drawn without bleeding, and the composition is easy to apply. The viscosity range can be adjusted by combining the coated plate-like pigment, the chromatic pigment, water, and the acrylic copolymer in suitable amounts, and by adjusting suitable stirring and dispersion conditions.

[0035] The aqueous liquid cosmetic preparation of the present invention is prepared by mixing and dispersing the above-mentioned components in the above-mentioned content ranges using a mixer / disperser such as a bead mill, homomixer, disperser, attritor, ball mill, sand grinder or the like.

[0036] The aqueous liquid cosmetic preparation of the present invention thus constituted can be suitably used by being contained in an applicator having an application part constituted by a brush tip (tip). In addition, in applicators that have an applicator section made of fibers solidified with resin or the like, or a so-called pen core type applicator section made of fibers fused together, the plate-shaped pigment can be slid onto the application surface by application, but the application liquid is scraped off, resulting in a reduced effect of increasing the sense of brilliance and inferior applicability. An example of an applicator that can be used is the applicator shown in FIG. 1, which contains the aqueous liquid cosmetic composition having the above-mentioned composition. An example of a liquid cosmetic applicator loaded with the aqueous liquid cosmetic of the present invention is a collector-type applicator having a front barrel 210 and a barrel body 214 into which a barrel main body 212 at the rear side of the front barrel 210 fits, as shown in FIG. 1(a), and a comb-like collector 216 having a plurality of leaf portions arranged in the axial direction is disposed at the front of the barrel 214, as shown in FIG. 1(b), and the above-mentioned liquid cosmetic composition is stored in storage space 214a at the rear of the barrel 214.

[0037] Shaft body 212 at the rear of shaft body 214 is formed like a pipe whose interior is connected and which is open to the front and rear. A tail plug 214b is fitted into the rear part of shaft body 212, which is also the rear part of the shaft body, to close the rear part of shaft body 212, and the space within shaft body 214 (which is also the space within shaft body 212) sandwiched between the front end of tail plug 214b and the rear end of collector 216 forms accommodation space 214a. In the accommodation space 214a, no impregnated body such as padding is placed, but the coating liquid is directly accommodated, and an agitator (ball or the like) 214c for agitating the coating liquid is also placed.

[0038] Lead barrel 210, barrel body 212, collector 216, cap, etc. may be resin molded products. Stirrer 214c may be a ball material made of metal, resin, or the like. The collector 216 is a structure that is covered and held by the front barrel 210 and the barrel body 212 . And, from the opening at the front end of tip barrel 210, application part 218 consisting of a tapered brush body protrudes, and a cap covering application part 218 is removably fitted onto tip barrel 210. Tip barrel 210 is tapered to have an approximately conical side shape, and it is desirable to form the tip angle of tip barrel 210 at approximately the same angle as the tip angle of application part 218. It is nice.

[0039] Application part 218 is a tapered brush body (tip brush) composed of resin fibers, natural fiber bundles, and a resin porous body. Application part 218 has a rear end portion with an expanded diameter like a flange, and this expanded portion engages with front barrel 210 to prevent it from coming off.

[0040] Inside tip barrel 210, which is formed hollow and tapered, a bellows-shaped collector 216 is disposed behind application portion 218, and core 222 is disposed penetrating through the hollow portion of collector 216. Core 222 can be composed of a capillary member such as a resin fiber bundle, a natural fiber bundle, or a resin porous body. In the case of the central core 222, the central core 222 does not protrude from the rear end of the collector 216 into the accommodation space 214a of the shaft body 214 (see FIG. 1(b)). The rear end face of the central core 222 is almost aligned with the rear end face of the collector 216. By aligning the central core 222, the rear end of the central core 222 does not protrude into the accommodation space 214a, and the volume of the accommodation space 214a can be secured. In addition, since the rear end of the central core 222 does not protrude into the accommodation space 214a, when the agitator 214c is provided in the accommodation space 214a, even if the agitator 214c moves within the accommodation space 214a, it does not collide with the central core 222 and does not deform the central core 222, so that the coating liquid can be sufficiently penetrated.

[0041] The liquid cosmetic applicator of the above form has been described as being an example of a liquid cosmetic applicator for applying a liquid eyeliner or liquid eyeshadow, which is an aqueous liquid cosmetic of the present invention, but the present invention is not limited to this and can also be used as an eyebrow applicator for drawing lines on eyebrows and for drawing lines on the skin. Furthermore, as the liquid pressing mechanism of the liquid cosmetic applicator of the above-described form, a rotary-type dispensing applicator as shown in FIG. 1 was used, but a knock-type dispensing liquid cosmetic applicator may also be used.

[0042] The aqueous liquid cosmetic of the present invention thus constituted is a liquid cosmetic composition containing a small amount of a plate-like pigment having lustrous properties, and even when it is mounted on an applicator having an application part, such as a brush, and applied to a surface to be applied, such as the skin, it becomes an aqueous liquid cosmetic that enables the drawing, etc. of lines with a consistent hue and brightness over time. This is presumably due to the following action and effects. According to the present invention, by preparing an aqueous liquid cosmetic composition containing at least (a) 0.01 to 10 mass % of a plate-like pigment having a surface coated with a compound selected from Group A above, (b) at least one chromatic pigment having an average particle size of 0.01 to 1 μm as measured by dynamic light scattering, (c) 1 to 20 mass % in terms of solids content of an acrylic copolymer, and (d) water, which is to be mounted on an applicator having an application part composed of a brush, it is possible to prevent the chromatic pigment particles having an average particle size of 0.01 to 1 μm from getting into between the plate-like pigments when they settle, thereby preventing the formation of a hard cake. Furthermore, it is presumed that by suppressing the settling of the plate-like pigment, which exhibits brilliance, it is possible to suppress the decrease in hue difference and brilliance that occurs over time, and thus obtain an aqueous liquid cosmetic composition that is suitable for applicators such as direct-liquid eyeliners, eyeshadows, and eyebrow liner for drawing eyebrow lines, which allows the user to write lines that have a constant hue and brilliance over time. Therefore, since the aqueous liquid cosmetic preparation of the present invention has the above-mentioned functions and effects, it can be suitably used for eye make-up such as eyeliner. EXAMPLES

[0043] The present invention will be described in more detail below with reference to examples and comparative examples. However, the present invention is not limited to the following examples.

[0044] [Examples 1 to 8, Comparative Examples 1 to 8] Each aqueous liquid cosmetic was prepared by mixing and dispersing the ingredients according to the formulations shown in Tables 1 and 2 below using a homomixer or disperser. The aqueous liquid cosmetics obtained above in Examples 1 to 8 and Comparative Examples 1 to 8 were evaluated for viscosity, brilliance, brilliance difference, hue difference, hiding power, and adhesion at 25° C. using the following measurement and evaluation methods. The pH of each of these aqueous liquid cosmetics was in the range of 6.5 to 8.5. The results are shown in Table 1 below.

[0045] [Method of measuring viscosity] Each of the obtained aqueous liquid cosmetic compositions was measured at a temperature of 25°C using a cone-plate type viscometer (a TV-30 type viscometer, ELD type viscometer, standard cone plate, manufactured by Tokimec Co., Ltd.) at a predetermined shear rate (191.5 S -1 ) was measured.

[0046] [Evaluation methods for brightness, brightness difference, hue difference, hiding power, and adhesion] Each applicator was prepared by combining the aqueous liquid cosmetic compositions shown in Table 1 below with each applicator having the pen tip and pen core shown in Figures 1 and 2, respectively, and evaluated for brilliance, brilliance difference, hue difference, hiding power, and adhesion. The brush head used in each of the examples in FIG. 1 is a tapered brush body (brush head) made of a bundle of polybutylene terephthalate resin fibers having a diameter of 0.05 to 0.3 mm. The pen core used in the comparative example in FIG. 2 is obtained through a process such as extrusion molding of polyacetal resin (POM). As shown in FIGS. 2(a) and (b), this pen core 10 is made of POM with an outer diameter of 3.0 mm and has an ink passage 11 of an internal groove with a radial cross section formed continuously in the axial direction, and the application part 12 at the tip is formed by cutting into a roughly bullet shape as a whole with a jet cone shape. Furthermore, the water-based liquid cosmetic of each formulation in Table 1 below is attached to an applicator body (not shown) having a valve mechanism, and holes (not shown) for introducing the cosmetic passage in the applicator body are formed in the pen core rear end 10a and the pen core side part 10b, so that the liquid cosmetic is applied from the application part by application operation. Using each applicator filled with the aqueous liquid cosmetic composition of each Example and Comparative Example having these brush heads and pen cores, a sensory evaluation was performed on the brilliance, brilliance difference, hue difference, hiding power, and adhesion power using the evaluation methods described below.

[0047] [Method of evaluating brightness] Each application tool was used to apply the composition to the skin, and the composition was visually observed and sensory evaluated for brightness according to the following evaluation criteria. Evaluation criteria: ◎: High brightness. ○: Brightness is felt. △: Low brightness. ×: Almost no brightness.

[0048] [Luminance Difference Evaluation Method] Each applicator was used and left to stand for a certain period of time (24 hours) facing up or down, after which it was applied to the skin and visually observed and subjected to a sensory evaluation of the brightness difference according to the following evaluation criteria. Evaluation criteria: ◎: The brightness is consistent. ◯: The brightness is almost constant. △: The brightness is decreased. ×: The brightness is lost.

[0049] [Method of evaluating hue difference] The skin was applied with each applicator, and the skin was visually observed and subjected to a sensory evaluation for hue difference according to the following evaluation criteria. Evaluation criteria: ◎: No change in hue. ○: The hue is almost constant. △: There is a slight change in hue. ×: There is a change in hue.

[0050] [Method of evaluating hiding power] Each applicator was used to apply the composition to the skin, and the composition was visually observed to determine whether it concealed the skin color and subjected to a sensory evaluation according to the following evaluation criteria. Evaluation criteria: ◎: Completely conceals skin color. ○: The skin color is slightly visible. △: The skin color is visible through the material. ×: Skin color is not concealed at all.

[0051] [Method for evaluating adhesion] Using each applicator, the product was applied to the periphery of the eye, and after 4 hours, the product was visually observed and subjected to a sensory evaluation of adhesion according to the following evaluation criteria. Adhesion evaluation criteria: ◎: There is almost no change in the brightness and color of the lines compared to the initial state. ○: There is little change in the brightness and color of the lines compared to the initial state. △: Brightness and color are significantly reduced from the initial stage. ×: Almost no lines remain.

[0052] [Table 1]

[0053] *1 to *14 in Table 1 above are as follows. *1: (Production Example 1) MT1030PS (Nippon Sheet Glass Co., Ltd.) is surface-treated with crystalline cellulose (Ceolas RC-591, Asahi Kasei Corporation) by spray drying. Average particle size on smooth surface: 30 μm, surface coverage rate: 2% *2: (Production Example 2) MT1080PS (Nippon Sheet Glass) with crystalline cellulose (Ceolas RC-591, Asahi Kasei) spray-dried for surface treatment. Average particle size on smooth surface: 80 μm, surface coverage: 2% *3: MT1030PS (Nippon Sheet Glass: untreated surface), average particle size on smooth surface: 10-70μm *4: DK BLACK No.2, average particle size: 200nm, manufactured by Daito Kasei Kogyo Co., Ltd. *5: DK D&C RED N0.30, average particle size: 300nm, manufactured by Daito Kasei Kogyo Co., Ltd. *6: Bengala N0.216P, average particle size: 300 nm, manufactured by Daito Kasei Kogyo Co., Ltd. *7: Sericite FSE, average particle size: 10 μm, manufactured by Sanshin Mining & Engineering Co., Ltd. *8: ST-485SA15, average particle size: 8nm, manufactured by Titan Kogyo Co., Ltd. *9: Yodozol GH800F, manufactured by Nouryon Japan, solid content 45%, the values ​​in Table 1 are listed as solid content. *10:Beaute by Roquette CD102, manufactured by Roquette Freres *11: Keltrol, MP Gokyo Food & Chemical Co., Ltd. *12: Ceolas RC-N30, manufactured by Asahi Kasei Corporation *13: AMP, citric acid *14: Phenoxyethanol SP, manufactured by Yokkaichi Chemical Co., Ltd.

[0054] As is clear from the results in Table 1 above, it was confirmed that Examples 1 to 8, which support the present invention, are aqueous liquid cosmetics that are excellent in brilliance, brilliance difference, hue difference, hiding power, and adhesion, compared to Comparative Examples 1 to 8, which are outside the scope of the present invention. [Industrial Applicability]

[0055] The aqueous liquid cosmetic composition of the present invention can be suitably used for liquid eyeliner, liquid eyeshadow, eyebrow liner for drawing eyebrow lines, and the like.

Claims

1. The aqueous liquid cosmetic preparation comprises at least: (a) 0.01 to 10 mass % of a plate-like pigment having a surface coated with a compound selected from Group A below; (b) at least one chromatic pigment having an average particle size of 0.01 to 1 μm as measured by dynamic light scattering; (c) 1 to 20 mass % in terms of solid content of an acrylic copolymer; and (d) water, and is mounted on an applicator having an application part composed of a brush. Group A: cellulose, hemicellulose, lignin, chitin, chitosan

2. 2. The aqueous liquid cosmetic preparation according to claim 1, further comprising a thickener.

3. 3. The aqueous liquid cosmetic preparation according to claim 2, wherein the thickener is a dextrin and / or a thickening polysaccharide.

4. 25°C, shear rate 191.5s －１ 3. The aqueous liquid cosmetic preparation according to claim 1, wherein the viscosity of the aqueous liquid cosmetic preparation measured by a spectrophotometer is 15.0 mPa·s or less.

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