Water-based liquid cosmetics and pen-type cosmetics

Abstract

To provide an aqueous liquid cosmetic which has sufficient discharge properties even when an auto-pen type applicator is used and hardly causes color separation at an application part while containing iron blue and a natural pigment lake and to provide a pen-type cosmetic containing the same.SOLUTION: There is provided an aqueous liquid cosmetic which contains (A) a pigment and (B) a dispersant and has a viscosity at 25°C of 1 to 50 mPa s, where the component (A) contains at least one selected from the group consisting of (A1) iron blue and a natural pigment lake and the aqueous liquid cosmetic contains (C1) at least one inorganic salt selected from the group consisting of a chloride, a sulfate, a nitrate, a carbonate and a phosphate.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an aqueous liquid cosmetic and a pen-type cosmetic. [Background technology]

[0002] Autopen-type applicators are widely used as a product form for aqueous liquid cosmetics due to their ease of use. In these applicators, the cosmetic is transported from a reservoir filled with the cosmetic to the pen tip by capillary action. The cosmetics used here are often low-viscosity to facilitate transport, and pigments tend to settle over time. Pigment settling can lead to problems such as clogging of the cosmetic reservoir or flow path and blurred lines. To address these issues, attempts have been made to improve the dispersibility and ejection properties of aqueous liquid cosmetics by incorporating anionic dispersants such as sodium polyaspartate (see, for example, Patent Documents 1 and 2 listed below). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-231614 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-164912 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, liquid eyeliners and eyebrow cosmetics have increasingly come in a variety of colors, such as blue, green, and milky colors, in addition to black and brown. In addition to the traditional black pigments such as black iron oxide and carbon black, inorganic pigments such as red ochre, yellow iron oxide, titanium oxide, and Prussian blue, synthetic organic pigments such as tar dyes, and natural color lakes such as carmine may be mixed in these products.

[0005] However, the inventors have found that aqueous liquid cosmetics containing Prussian blue or lakes of natural pigments cause color separation on the tip of the applicator. This color separation at the application area leads to differences in the shade (or hue) of the drawn line, which is undesirable for the product, and they have also found that this cannot be sufficiently suppressed even by adding an anionic dispersant.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide an aqueous liquid cosmetic that has sufficient ejection properties even when used with an auto-pen type applicator, and that is resistant to color separation at the application site even when containing Prussian blue or a lake of natural pigment, and a pen-type cosmetic containing the same. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides an aqueous liquid cosmetic preparation comprising (A) a pigment and (B) a dispersant, and having a viscosity of 1 to 50 mPa s at 25°C, wherein component (A) comprises (A1) at least one selected from the group consisting of Prussian blue and lakes of natural pigments, and the aqueous liquid cosmetic preparation comprises (C1) at least one inorganic salt selected from the group consisting of chlorides, sulfates, nitrates, carbonates, and phosphates.

[0008] The aqueous liquid cosmetic of the present invention, having the above-described configuration, allows for sufficient discharge even when used with an auto-pen type applicator, and also makes it possible to suppress color separation at the application part.

[0009] The aqueous liquid cosmetic may contain a chloride as component (C1) from the viewpoints of suppressing color separation at the application site and improving dischargeability, and the content of the chloride may be 0.05 to 1 mass % based on the total amount of the cosmetic.

[0010] From the viewpoints of suppressing color separation at the application site and improving dischargeability, the aqueous liquid cosmetic may contain a polyphosphate as component (C1), and the content of the polyphosphate may be 0.005 to 0.1% by mass based on the total amount of the cosmetic.

[0011] Furthermore, the component (B) may contain an anionic dispersant (B1).

[0012] The present invention also provides a pen-type cosmetic comprising an auto-pen type applicator and the above-mentioned aqueous liquid cosmetic filled in the applicator. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide an aqueous liquid cosmetic that has sufficient ejection properties even when used with an auto-pen type applicator, and that is resistant to color separation at the application area even when containing Prussian blue or a lake of natural pigment, and a pen-type cosmetic containing the same. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic cross-sectional view for explaining a pen-type cosmetic product. DETAILED DESCRIPTION OF THE INVENTION

[0015] The aqueous liquid cosmetic preparation of the present embodiment comprises (A) a pigment (hereinafter sometimes referred to as component (A)), (B) a dispersant (hereinafter sometimes referred to as component (B)), and (C1) at least one inorganic salt selected from the group consisting of chlorides, sulfates, nitrates, carbonates, and phosphates (hereinafter sometimes referred to as component (C1)).

[0016] In this specification, the term "aqueous" means that at least water is contained. In addition to water, the aqueous cosmetic preparation may further contain a lower alcohol having 1 to 5 carbon atoms, such as ethanol.

[0017] The water content in the aqueous liquid cosmetic of this embodiment may be 30 to 85 mass %, 40 to 80 mass %, or 50 to 70 mass % based on the total mass of the cosmetic.

[0018] Furthermore, in this specification, the term "liquid" refers to a material that exhibits fluidity at 25° C. The viscosity of the aqueous liquid cosmetic preparation of this embodiment at 25° C. can be set to 1 to 50 mPa·s.

[0019] From the viewpoint of achieving good dischargeability in an auto-pen type, the viscosity of the aqueous liquid cosmetic composition of this embodiment at 25° C. is preferably 40 mPa·s or less, more preferably 35 mPa·s or less, even more preferably 30 mPa·s or less, and even more preferably 25 mPa·s or less. Furthermore, from the viewpoint of usability, the viscosity of the aqueous liquid cosmetic composition of this embodiment at 25° C. is preferably 4 mPa·s or more, and more preferably 6 mPa·s or more.

[0020] The viscosity mentioned above means a value measured on a sample at 25° C. using a Brookfield viscometer (BM type) under the following conditions. 1 to 50 mPa·s: BL adapter, rotation speed 12 rpm

[0021] [(A) Pigment] The pigments that can be used are not particularly limited as long as they are those that are normally used in cosmetics. For example, inorganic pigments such as red iron oxide, yellow iron oxide, black iron oxide, cobalt oxide, chromium oxide, ultramarine, Prussian blue, titanium oxide, fine particle titanium oxide, zinc oxide, titanium black (sintered titanium-titanium oxide), carbon black, barium sulfate, pearl pigments (titanium mica, iron oxide-coated titanium mica, fine particle titanium oxide-coated mica titanium, barium sulfate-coated mica titanium, fish scale foil, bismuth oxychloride, aluminum flakes, etc.), Red No. 201, Red No. 202, Red Examples of suitable pigments include organic pigments such as zirconium, barium, or aluminum lakes, such as Red No. 205, Red No. 226, Red No. 228, Orange No. 203, Orange No. 204, Blue No. 404, Yellow No. 401, 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, as well as lakes of natural pigments such as carminic acid, laccaic acid, carthamine, brazilin, and crocin (hereinafter referred to as "natural pigment lakes"). These pigments may be surface-treated to improve usability and dispersibility. Examples of suitable surface treatments include metal soaps, silicone compounds, fluorine compounds, surfactants, and amino acid compounds.

[0022] The component (A) can be used alone or in combination of two or more.

[0023] In order to provide a wide range of colors, the aqueous liquid cosmetic of this embodiment can contain, as component (A1), at least one selected from the group consisting of Prussian blue and lakes of natural pigments (hereinafter, sometimes referred to as component (A1)).

[0024] From the viewpoints of ejection properties and color development of drawn lines, the content of the component (A1) may be 1 to 99% by mass, 5 to 95% by mass, 10 to 90% by mass, or 20 to 85% by mass based on the total amount of the component (A).

[0025] In order to enable the aqueous liquid cosmetic preparation of this embodiment to be available in a variety of colors, it may further contain, as component (A), at least one metal oxide selected from the group consisting of titanium oxide, red iron oxide, yellow iron oxide, black iron oxide, and titanium black (sintered titanium-titanium oxide) (hereinafter, sometimes referred to as component (A2)).

[0026] The aqueous liquid cosmetic composition of this embodiment can suppress color separation in the application area, even when it contains components (A1) and (A2). When the aqueous liquid cosmetic composition contains a white pigment, such as when titanium oxide is blended as component (A2), color differences due to color separation in the application area tend to become more noticeable. However, the aqueous liquid cosmetic composition of this embodiment can sufficiently suppress color separation in the application area.

[0027] The content of component (A) in the aqueous liquid cosmetic of this embodiment may be 0.1 to 30 mass %, 1 to 25 mass %, or 2 to 20 mass %, based on the total mass of the cosmetic.

[0028] [(B) Dispersant] The component (B) is not particularly limited as long as it is one that is normally used in cosmetics, and can be an anionic dispersant (hereinafter sometimes referred to as component (B1)), a nonionic dispersant, a water-soluble polymer other than these, etc. Furthermore, the component (B) can be water-soluble.

[0029] Examples of the (B1) component include anionic polymers such as polyaspartates, polycarboxylates such as polyacrylates and polymethacrylates. The (B1) component can be water-soluble. The (B1) component can be used alone or in combination of two or more.

[0030] Polyaspartates are polymers containing aspartic acid as a structural unit. Polycarboxylates are homopolymers or copolymers containing structural units derived from ethylenically unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, and itaconic acid. Polyacrylates are homopolymers containing acrylic acid as a structural unit, and polymethacrylates are homopolymers containing methacrylic acid as a structural unit.

[0031] As the salt of the above polymer, alkali metal salts such as sodium salts and potassium salts, organic amine salts such as diethanolamine salts and triethanolamine salts, or basic amino acid salts can be used, with sodium salts and potassium salts being preferred.

[0032] From the viewpoint of achieving both ejection properties and suppressing color separation and differences in line density in the applied area, the average molecular weight (Mw) of the anionic polymer may be 1,000 to 30,000, 1,000 to 15,000, or 2,000 to 10,000. The average molecular weight (Mw) of the water-soluble polymer can be measured by gel permeation chromatography (GPC) using polyethylene glycol of known molecular weight as a standard substance.

[0033] Commercially available products can be used for component (B1). Examples of polyaspartates include Aquadew SPA-30 (manufactured by Ajinomoto Co., Inc., average molecular weight (Mw) 4000) and Baypure DS100 (manufactured by Lanxess AG, average molecular weight (Mw) 2500). Examples of polyacrylates include Aron T-50 (manufactured by Toagosei Co., Ltd., average molecular weight (Mw) 6000) and Aron A-30SL (manufactured by Toagosei Co., Ltd., average molecular weight (Mw) 6000). Examples of polycarboxylates include Aron A-6330 (manufactured by Toagosei Co., Ltd., average molecular weight (Mw) 10000) and Aron A-6001 (manufactured by Toagosei Co., Ltd., average molecular weight (Mw) 8000).

[0034] From the viewpoint of achieving a high level of both dischargeability and suppression of color separation at the application site, the content of the component (B1) may be 0.05 to 5 mass%, 0.1 to 3 mass%, 0.12 to 1 mass%, or 0.15 to 0.5 mass% based on the total amount of the cosmetic.

[0035] From the viewpoint of achieving both ejection properties and suppressing color separation and differences in line shading at the application site, the aqueous liquid cosmetic preparation of this embodiment may contain, as component (B1), an anionic polymer (B1-L) having an average molecular weight (Mw) of 1,000 to 30,000 and an anionic polymer (B1-H) having an average molecular weight (Mw) of 50,000 to 1,000,000, and the mass ratio thereof, (B1-L) / (B1-H), may be 0.1 / 1 to 5 / 1, 1 / 5 to 3 / 1, or 1 / 3 to 5 / 3.

[0036] Examples of nonionic dispersants include polyoxyalkylene alkyl ethers, glycerin alkyl ethers, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, and alkylene glycol adducts thereof, polyalkylene glycol fatty acid esters, polyglycerin-modified silicones, and polyether-modified silicones.

[0037] Examples of water-soluble polymers other than the above dispersants include polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), and vinylpyrrolidone / vinyl acetate copolymer (VP / VA copolymer).

[0038] The content of component (B) in the aqueous liquid cosmetic of this embodiment may be 0.1 to 5 mass %, 0.2 to 4 mass %, or 0.3 to 3 mass %, based on the total mass of the cosmetic.

[0039] [(C1) component] Component (C1) is at least one inorganic salt selected from the group consisting of chlorides, sulfates, nitrates, carbonates, and phosphates. Examples of component (C1) include chlorides such as sodium chloride, potassium chloride, magnesium chloride, calcium chloride, aluminum chloride, zinc chloride, and ammonium chloride; sulfates such as sodium sulfate, potassium sulfate, magnesium sulfate, aluminum sulfate, zinc sulfate, and ammonium sulfate; nitrates such as sodium nitrate, potassium nitrate, magnesium nitrate, calcium nitrate, aluminum nitrate, zinc nitrate, and ammonium nitrate; carbonates such as sodium carbonate, potassium carbonate, magnesium carbonate, and calcium carbonate; and phosphates such as polyphosphates such as sodium phosphate, potassium phosphate, and sodium metaphosphate and potassium metaphosphate. Of these, sodium chloride and magnesium chloride can be used to prevent color separation at the application site.

[0040] From the viewpoint of achieving a high level of both dischargeability and suppression of color separation at the application site, the content of component (C1) in the aqueous liquid cosmetic of this embodiment may be 0.005 to 1 mass%, 0.01 to 0.8 mass%, 0.05 to 1 mass%, 0.06 to 0.8 mass%, 0.02 to 0.5 mass%, or 0.07 to 0.5 mass%, based on the total mass of the cosmetic.

[0041] When the aqueous liquid cosmetic preparation of this embodiment contains a chloride as component (C1), the chloride content may be 0.05% by mass or more, or 0.1% by mass or more, from the viewpoint of suppressing color separation at the application site, or 1% by mass or less, or 0.5% by mass or less, from the viewpoint of ejection performance, or 0.05 to 1% by mass, or 0.1 to 0.5% by mass, from the viewpoints of suppressing color separation at the application site and ejection performance.

[0042] When the aqueous liquid cosmetic preparation of this embodiment contains a polyphosphate as component (C1), the content of the polyphosphate may be 0.005% by mass or more, or may be 0.01% by mass or more, from the viewpoint of suppressing color separation at the application site, or 0.1% by mass or less, or may be 0.05% by mass or less, from the viewpoint of ejection properties, or 0.005 to 0.1% by mass, or 0.01 to 0.05% by mass, from the viewpoints of suppressing color separation at the application site and ejection properties.

[0043] Furthermore, from the viewpoint of suppressing color separation in the application area, the mass ratio of component (C1) to component (A1) [(C1) / (A1)] may be 1 / 2000 to 1 / 4, 1 / 200 to 1 / 4, 1 / 1000 to 1 / 5, 1 / 150 to 1 / 5, 1 / 900 to 1 / 6, 1 / 100 to 1 / 6, 1 / 800 to 1 / 7, or 1 / 70 to 1 / 7.

[0044] When the aqueous liquid cosmetic preparation of this embodiment contains a chloride as component (C1), the mass ratio of the chloride to component (A1) [(chloride) / (A1)] may be 1 / 1000 or more, or 1 / 200 or more, from the viewpoint of suppressing color separation in the application area; may be 1 / 4 or less, or 1 / 10 or less, from the viewpoint of ejection ability; and may be 1 / 1000 to 1 / 4, or 1 / 200 to 1 / 10, from the viewpoints of suppressing color separation in the application area and ejection ability.

[0045] When the aqueous liquid cosmetic preparation of this embodiment contains a polyphosphate as component (C1), the mass ratio of the polyphosphate to component (A1) [(polyphosphate) / (A1)] may be 1 / 2000 or more, or 1 / 1000 or more, from the viewpoint of suppressing color separation in the application area; may be 1 / 50 or less, or 1 / 150 or less, from the viewpoint of ejection ability; and may be 1 / 2000 to 1 / 50, or 1 / 1000 to 1 / 150, from the viewpoints of suppressing color separation in the application area and ejection ability.

[0046] From the viewpoint of achieving a high level of both ejection performance and suppression of color separation at the application site, the aqueous liquid cosmetic preparation of this embodiment contains the component (C1) and the above-mentioned component (B1-L), and the mass ratio thereof [(C1) / (B1-L)] may be 0.3 / 5 to 3 / 1, 0.4 / 5 to 2 / 1, or 0.1 / 1 to 1 / 1.

[0047] In addition to the above-mentioned components, the aqueous liquid cosmetic according to this embodiment may contain other components commonly used in cosmetics, such as powders other than component (A), surfactants, film-forming agents, moisturizers, viscosity adjusters, preservatives, pH adjusters, chelating agents, UV absorbers, vitamins, cosmetic ingredients, antioxidants, fragrances, etc., as needed, within a range that does not impair the effects of the present invention.

[0048] Examples of powders other than component (A) include white body powders such as talc, muscovite, phlogopite, lepidolite, biotite, synthetic mica, sericite, synthetic sericite, kaolin, silicon carbide, bentonite, smectite, diatomaceous earth, aluminum silicate, magnesium aluminum metasilicate, calcium silicate, barium silicate, magnesium silicate, calcium carbonate, magnesium carbonate, hydroxyapatite, and boron nitride; synthetic resin powders such as polyamide resins, polyethylene resins, polyacrylic resins, polyester resins, fluorine-containing resins, cellulose resins, polystyrene resins, and styrene-acrylic copolymer resins; organic polymer resin powders such as polypropylene resins and urethane resins; organic low-molecular-weight powders such as zinc stearate and N-acyl lysine; and natural organic powders such as silk powder and cellulose powder.

[0049] As the surfactant, a hydrophilic nonionic surfactant, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, or the like can be used.

[0050] Examples of hydrophilic nonionic surfactants include polyoxyalkylene alkyl ethers, glycerin alkyl ethers, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters and their alkylene glycol adducts, polyalkylene glycol fatty acid esters, polyglycerin-modified silicones, polyether-modified silicones, etc. Examples of anionic surfactants include alkyl phosphates, polyoxyalkylene alkyl ether phosphates, sulfonates, alkyl sulfates, etc. Examples of cationic surfactants include alkylamine salts, alkyltrimethylammonium salts, etc. Examples of amphoteric surfactants include lecithin, carbobetaine-type amphoteric surfactants, sulfobetaine-type amphoteric surfactants, amino acid-type amphoteric surfactants, etc.

[0051] Film-forming agents include film-forming polymer emulsions, PVP, PVA, VP / VA copolymers, and the like.

[0052] The polymer contained in the film-forming polymer emulsion includes a water-insoluble polymer or copolymer containing alkyl (meth)acrylate monomers as structural units. Examples of structural units of copolymers include vinyl acetate monomers and styrene monomers. The copolymers may be random copolymers, graft copolymers, block copolymers, or core-shell copolymers.

[0053] Specific examples of film-forming polymer emulsions include alkyl acrylate copolymer emulsions, alkyl acrylate-styrene copolymer emulsions, and alkyl acrylate-vinyl acetate copolymer emulsions. The term "alkyl acrylate" as used herein also encompasses alkyl methacrylate. Film-forming polymer emulsions can be used with water as the medium and a solids concentration of 30 to 60% by mass.

[0054] Commercially available film-forming polymer emulsions can be used. Examples of alkyl acrylate copolymer emulsions include Yodozole GH800F (Akzo Nobel, product name, solid content 45% by mass), Yodozole GH810F (Akzo Nobel, product name, solid content 46% by mass), Yodozole GH34F (Akzo Nobel, product name, solid content 42% by mass), and Daitosol 5000SJ (Daito Kasei Kogyo Co., Ltd., product name, solid content 50% by mass). Examples of alkyl acrylate-styrene copolymer emulsions include Yodozole GH41F (Akzo Nobel, product name, solid content 45% by mass), Daitosol 5000STY (Daito Kasei Kogyo Co., Ltd., product name, solid content 50% by mass), and Emmapoly CE-119N (Nikko Chemicals Co., Ltd., product name). Examples of alkyl acrylate-vinyl acetate copolymer emulsions include Vinizol 2140L (product name, manufactured by Daido Chemical Industry Co., Ltd., solid content concentration 45% by mass).

[0055] The film-forming polymer emulsions can be used alone or in combination of two or more.

[0056] The content of the film-forming agent in the aqueous liquid cosmetic of this embodiment may be 2 to 20 mass %, 4 to 16 mass %, 6 to 12 mass %, or 7 to 10 mass % in terms of solid content concentration, based on the total amount of the cosmetic.

[0057] The aqueous liquid cosmetic preparation according to this embodiment can be produced by dissolving or dispersing the above-mentioned components (A), (B), and (C1) in water, as well as other components as necessary, and stirring and mixing them uniformly.

[0058] The aqueous liquid cosmetic composition according to this embodiment can be used as a makeup cosmetic composition such as eyeliner, eyebrow pencil, eyeshadow, and mascara.

[0059] The aqueous liquid cosmetic according to this embodiment can be used in any known product form used for cosmetics. Examples of product forms include pen types (pen-shaped), bottle types, etc. Examples of pen types include mechanical types that include a cosmetic storage section, such as a fiber bundle impregnated with the cosmetic or a storage section filled with the cosmetic, and an application section made of a brush or felt attached to the storage section, in which the cosmetic is forcibly dispensed by applying force to the storage section with a dial or knock, and auto-pen types that dispense the cosmetic by the action of the surface tension of the liquid cosmetic and capillary action.

[0060] From the viewpoints of ease of use and portability, the aqueous liquid cosmetic according to this embodiment is preferably used in an auto-pen type. Known auto-pen type containers can be used, such as the liquid cosmetic container disclosed in JP 2016-87094 A.

[0061] The pen-type cosmetic product of the present embodiment comprises an auto-pen type applicator and the aqueous liquid cosmetic composition according to the present embodiment described above, which is filled into the applicator.

[0062] FIG. 1 is a schematic cross-sectional view of a pen-shaped cosmetic product. The pen-shaped cosmetic product 100 shown in FIG. 1 has an overall shape resembling a long, thin rod resembling a writing implement. It generally comprises a cylindrical container body 1, a storage section 2 provided within the container body 1 and storing an aqueous liquid cosmetic preparation L according to this embodiment, a brush 3 attached to the tip of the container body 1 for applying the aqueous liquid cosmetic preparation L in the storage section 2, a shaft-shaped intermediate core 4 disposed within the container body 1 and connecting the storage section 2 to the brush 3, and a substantially cylindrical accordion member 5 attached around the intermediate core 4. Here, a cylindrical, bottomed grip tube 6 is detachably attached to the container body 1 by threading, so that the user can easily hold the container body 1 and apply the cosmetic. The container body 1 is not limited to a cylindrical shape and may be a rectangular tube, for example.

[0063] In the pen-type cosmetic product 100, the storage section 2, the writing brush 3, and the intermediate core 4 constitute an auto-pen type applicator, and the storage section 2 is filled with the aqueous liquid cosmetic material according to this embodiment.

[0064] The container body 1 is made of, for example, PP and is configured as a tapered cylinder with a flange. The rear end face of the flange provided on the outer circumferential surface of the container body 1 abuts against the front end face of a gripping tube 6 screwed into the container body 1, and the front end face of the flange abuts against the open end face of a cap 10 attached to the container body 1. The opening at the rear end of the container body 1 is closed by inserting and attaching a cylindrical tail plug 7 with a bottom.

[0065] The bellows member 5 is used to control the flow rate of the aqueous liquid cosmetic material L, has a groove (bellows) that contains the aqueous liquid cosmetic material L, and is attached to the container body 1 by fitting its cylindrical rear end into a recess in the inner peripheral surface of the container body 1. The container section 2 is formed inside the container body 1 between the rear end of the bellows member 5 and the tail plug 7, and this container section 2 is filled with the aqueous liquid cosmetic material L.

[0066] The relay core 4 is made of, for example, acrylic resin, and extends in the axial direction so as to pass through the cylindrical hole of the bellows member 5. Its tip end engages with the tip end of the bellows member 5, thereby attaching it to the bellows member 5. The rear end of the relay core 4 enters the storage portion 2, and the tip end enters the writing brush 3, thereby connecting the inside of the storage portion 2 with the writing brush 3. The relay core 4 then sucks up the aqueous liquid cosmetic L in the storage portion 2 by capillary action and supplies it to the writing brush 3.

[0067] In the pen-type cosmetic product 100 shown in FIG. 1, the applicator is a writing brush, but it may be changed to a felt tip or a urethane tip.

[0068] A cylindrical cap 10 with a bottom for protecting the writing brush 3 and the like is detachably attached to the tip end of the container body 1 by fitting.

[0069] In the pen-type cosmetic product 100, a stirring bar 20 that can move in the axial direction and a coil spring 21 that can expand and contract in the axial direction are contained in the container 2 together with the aqueous liquid cosmetic L. Here, the stirring bar 20 is particularly preferably a sphere, but it may also be a polyhedron, a cone, or the like.

[0070] Coil spring 21 is an integrally molded spring in which multiple spring portions of different diameters (here, two spring portions of different diameters) are connected together in the axial direction, and here, is molded from, for example, SUS etc. This coil spring 21 has a small-diameter spring portion in its rear half that is smaller in diameter than stirring bar 20, and also has a large-diameter spring portion connected in a row axially adjacent to the small-diameter spring portion in front of it.

[0071] Here, when the user shakes the pen-shaped cosmetic 100, the stirrer 20 is movable in the axial direction within the large diameter spring portion that constitutes the coil spring 21, so the stirrer 20 moves in the axial direction, and this movement of the stirrer 20 stirs the aqueous liquid cosmetic L.

[0072] In the pen-type cosmetic product 100 configured in this manner, the aqueous liquid cosmetic material L in the storage section 2 flows out through the intermediate core 4 toward the writing brush 3 at the tip side, and is applied by the user using the writing brush 3. Note that, in the pen-type cosmetic product 100 according to this embodiment, by providing the stirring bar 20 and coil spring 21 described above, the aqueous liquid cosmetic material L can be efficiently flowed out to the writing brush 3, but the configuration may be changed to one that does not include the stirring bar 20 and coil spring 21.

[0073] While the above describes the pen-shaped cosmetic product according to this embodiment as an example of a cosmetic product having a container with a so-called direct liquid type configuration, the cosmetic container is not particularly limited to one with this type of configuration, and any known container can be used. For example, a container with a so-called batting type configuration may be used in which the bellows member 5, stirring bar 20, and coil spring 21 of the pen-shaped cosmetic product 100 are omitted, and the storage section 2 contains a batting member filled with the aqueous liquid cosmetic material L by impregnation, and the relay core 4, the rear end of which is inserted into the batting member, sucks up the aqueous liquid cosmetic material L and supplies it to the writing brush 3. [Example]

[0074] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to the following examples.

[0075] <Production of aqueous liquid cosmetics> (Examples 1 to 15, Comparative Examples 1 to 3) Each aqueous liquid cosmetic preparation was obtained by mixing the components shown in Tables 1 to 4 in the proportions (% by mass) shown in the tables using a disperser. Note that the values ​​for polymer emulsion, anionic dispersant, and nonionic dispersant in the tables indicate the amount of solid content.

[0076] The components shown in Tables 1 to 4 were as follows: Sodium polyaspartate: Sodium polyaspartate (manufactured by Ajinomoto Co., Inc., product name "Aquadew SPA-30B", average molecular weight (Mw) 4000) Sodium polyacrylate: Sodium polyacrylate (manufactured by Toagosei Co., Ltd., product name "Aron T-50", average molecular weight (Mw) 6000) Sodium polycarboxylate: sodium polyacrylate (manufactured by Toagosei Co., Ltd., product name "Aron A-6330", average molecular weight (Mw) 10,000) Alkyl acrylate copolymer: Alkyl acrylate copolymer (manufactured by BASF, product name "Luvimer 100P", average molecular weight (Mw) 70,000) Nonionic dispersant-1: Beheneth-30 (polyoxyethylene behenyl ether, manufactured by Nikko Chemicals Co., Ltd., product name "NIKKOL BB-30") Film-forming agent-1: (Acrylates / ethylhexyl acrylate) copolymer (manufactured by Daito Chemical Industry Co., Ltd., product name "Daitosol 5000SJ") Film-forming agent-2: PVP K-90 (Polyvinylpyrrolidone, manufactured by Ashland Specialty Ingredients, product name "PVP K-90")

[0077] <Viscosity of aqueous liquid cosmetics> The viscosity of the sample at 25° C. was measured using a Brookfield viscometer (BM type) and a BL adapter at a rotation speed of 12 rpm for one minute.

[0078] <Evaluation of aqueous liquid cosmetics> The aqueous liquid cosmetic compositions obtained above were evaluated for ejection properties, color separation at the applied area, and difference in shade of drawn lines according to the following evaluation methods.

[0079] (Dischargeability) The aqueous liquid cosmetic obtained above was filled into the storage portion of an auto-pen type liquid eyeliner container (applicator body: nylon tip, intermediate core: acrylic resin) having a structure similar to that of the container shown in Figure 1 to prepare a filled product.

[0080] The container-filled product was used to write on the back of the hand, and three lines 2 mm wide and 4 cm long were applied. The quality of the discharge when applied was visually confirmed, and the dischargeability was evaluated according to the following evaluation criteria. [Evaluation criteria] ⊚: A sufficient amount of liquid is dispensed and the drawn lines are uniform. ◯: The liquid was discharged in an acceptable amount, and the drawn lines were almost uniform. △: The amount of liquid dispensed is small, and the lines drawn are slightly uneven. ×: The amount of liquid dispensed is small, and the drawn lines are blurred.

[0081] (Color separation in the applied area and difference in shade (hue difference) of the drawn line) A container filled with the product was prepared in the same manner as above, and stored horizontally at room temperature for two weeks. The applied body (applied area) after storage was visually inspected, and color separation was evaluated according to the following evaluation criteria. [Evaluation criteria: Color separation at application area] ⊚: No change from before storage, the applied area is uniform, and no color separation is observed. ○: There was a slight change from before storage, but the applied area was almost uniform and almost no color separation was observed. △: There was a change from before storage, and the applied area was slightly separated in color. ×: There is a clear change from before storage, and the applied area is completely separated in color.

[0082] The containers were prepared in the same manner as above, and stored at room temperature for two weeks, with the pen tip (applicator) facing upward and with the pen tip facing downward. After storing the containers for two weeks, the pen was used to write on the back of the hand, and the difference in shading (hue difference) of the drawn lines was evaluated according to the following evaluation criteria. [Evaluation criteria: Difference in shading (hue difference)] ⊚: No difference in hue was observed between the products stored facing upward and those stored facing downward. ○: Almost no difference in hue was observed between the products stored facing upward and those stored facing downward. △: There is a slight difference in hue between the product stored facing upward and the product stored facing downward. ×: A significant difference in hue is observed between the product stored facing upward and the product stored facing downward.

[0083] [Table 1]

[0084] [Table 2]

[0085] [Table 3]

[0086] [Table 4] [Explanation of symbols]

[0087] 1...container body, 2...storage section, 3...brush (applicator), 20...stirrer, 21...coil spring (small diameter spring section and large diameter spring section), 100...pen-shaped cosmetic, L...aqueous liquid cosmetic.

Claims

1. An aqueous liquid cosmetic composition comprising (A) a pigment and (B) a dispersant, and having a viscosity of 1 to 50 mPa s at 25°C, The component (A) includes (A1) at least one selected from the group consisting of Prussian blue and lakes of natural pigments, The aqueous liquid cosmetic contains (C1) at least one inorganic salt selected from the group consisting of chlorides, sulfates, nitrates, carbonates, and phosphates, The component (C1) contains a chloride, The content of the chloride is 0.05 to 1% by mass based on the total amount of the cosmetic, The aqueous liquid cosmetic preparation has a mass ratio of the chloride to the component (A1) [(chloride) / (A1)] of 1 / 1000 to 1 / 4.

2. An aqueous liquid cosmetic composition comprising (A) a pigment and (B) a dispersant, and having a viscosity of 1 to 50 mPa s at 25°C, The component (A) includes (A1) at least one selected from the group consisting of Prussian blue and lakes of natural pigments, The aqueous liquid cosmetic contains (C1) at least one inorganic salt selected from the group consisting of chlorides, sulfates, nitrates, carbonates, and phosphates, The component (C1) contains a polyphosphate, the content of the polyphosphate is 0.005 to 0.1% by mass based on the total amount of the cosmetic; The aqueous liquid cosmetic preparation has a mass ratio of the polyphosphate to the component (A1) [(polyphosphate) / (A1)] of 1 / 2000 to 1 / 50.

3. An aqueous liquid cosmetic as described in claim 1, wherein the chloride is sodium chloride or magnesium chloride.

4. An aqueous liquid cosmetic as described in claim 2, wherein the polyphosphate is sodium metaphosphate or potassium metaphosphate.

5. 5. The aqueous liquid cosmetic preparation according to claim 1, wherein the component (B) comprises an anionic dispersant (B1).

6. A pen-type cosmetic comprising an auto-pen type applicator and the aqueous liquid cosmetic composition according to any one of claims 1 to 5 filled in the applicator.

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