Aqueous liquid cosmetic

Abstract

The water-based liquid cosmetic according to the present invention is a cosmetic housed in a pen-type application tool, and contains a titanium oxide pigment, a polyorganic acid or a polyorganic acid salt, emulsion particles containing an acrylic acid (ester)-based copolymer, and a water-based solvent, and the ratio of the mass of the titanium oxide pigment to the mass of the polyorganic acid or the polyorganic acid salt is more than 5.

Description

Technical Field

[0001] This invention relates to water-based liquid cosmetics. Background Technology

[0002] In the past, inorganic pigments have been used as coloring materials in cosmetics such as eyeshadow, eyeliner, eyebrow pencil, and mascara. Research has been conducted on issues such as inhibiting the aggregation and sedimentation of inorganic pigments in cosmetics, and / or increasing the density of pigment lines.

[0003] Patent Document 1 discloses an aqueous liquid cosmetic containing sodium diethylhexyl sulfosuccinate, inorganic coloring pigments, a water-soluble dispersant, and a film-forming polymer emulsion. In this aqueous liquid cosmetic, the content of sodium diethylhexyl sulfosuccinate is 0.01–1% by mass based on the total cosmetic content, and the content of the inorganic coloring pigment is 3–20% by mass based on the total cosmetic content, wherein the inorganic coloring pigment includes carbon black.

[0004] Patent document 2 discloses an aqueous liquid cosmetic containing sodium polyaspartate, at least one glossy powder, a water-soluble dispersant, and at least one given metal oxide.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2020-70259

[0008] Patent Document 2: Japanese Patent Application Publication No. 2020-132619 Summary of the Invention

[0009] The problem the invention aims to solve

[0010] This invention provides a water-based liquid cosmetic that maintains good liquid flowability, anti-drying properties upon opening, adhesion, sebum resistance, and water-based sebum resistance, and also provides good color development even after prolonged storage.

[0011] Solution for solving the problem

[0012] The inventors conducted in-depth research and discovered that the above-mentioned problems could be solved by the following means, thus completing the present invention. That is, the present invention is as follows:

[0013] <Method 1> A water-based liquid cosmetic, which is a cosmetic contained in a pen-shaped application tool.

[0014] The aqueous liquid cosmetic contains: titanium dioxide pigment, polyorganic acid or polyorganic acid salt, emulsion particles containing acrylic (ester) copolymers, and an aqueous solvent.

[0015] The mass ratio of the aforementioned titanium dioxide pigment to the aforementioned polyorganic acid or polyorganic acid salt exceeds 5.

[0016] <Method 2> The water-based liquid cosmetic according to Method 1, wherein the content of the aforementioned titanium dioxide pigment is 10% or more by mass relative to the overall water-based liquid cosmetic.

[0017] <Method 3> The water-based liquid cosmetic according to Method 1 or 2, wherein the aforementioned polyorganic acid or the aforementioned polyorganic acid salt is at least one of the group consisting of polyaspartic acid, polylactic acid, polyphosphate and polyacrylic acid or a salt thereof.

[0018] <Method 4> Aqueous liquid cosmetic according to any one of Methods 1 to 3, wherein the emulsion particles containing acrylic (ester) copolymers are core-shell type emulsion particles.

[0019] <Method 5> Aqueous liquid cosmetic according to any one of Methods 1 to 4, wherein the aforementioned aqueous solvent contains water and at least one alcohol selected from the group consisting of lower alcohols having 5 or fewer carbon atoms and polyols having 10 or fewer carbon atoms.

[0020] <Method 6> The water-based liquid cosmetic according to any one of Methods 1 to 5 further contains pigments other than the aforementioned titanium dioxide pigments.

[0021] <Method 7> The water-based liquid cosmetic according to Method 6, wherein the content of the aforementioned titanium dioxide pigment is 45% by mass or more relative to the total mass of the aforementioned titanium dioxide pigment and pigments other than the aforementioned titanium dioxide pigment.

[0022] <Method 8> A pen-shaped application tool that holds any of the water-based liquid cosmetics described in any of Methods 1 to 7.

[0023] The effects of the invention

[0024] According to the present invention, an aqueous liquid cosmetic product can be provided that maintains good liquid flowability, anti-drying properties upon opening, adhesion, sebum resistance, and water-sebum resistance, and can also provide good color development even after prolonged storage. Attached Figure Description

[0025] Figure 1 This is a partial cross-sectional view showing a first embodiment of a liquid cosmetic application tool for housing the water-based liquid cosmetic of the present invention. Figure 1 The mechanism is an example of a rotary extraction type mechanism.

[0026] Figure 2This is a partial cross-sectional view showing a second embodiment of a liquid cosmetic application tool that houses the water-based liquid cosmetic of the present invention. Figure 2 This organization is an example of a cosmetic in-house application tool type organization.

[0027] Figure 3 middle, Figure 3 (a) is a third-party perspective view showing a liquid cosmetic application tool that houses the water-based liquid cosmetic of the present invention. Figure 3 (b) is with Figure 3 (a) A partial cross-sectional view of the same liquid cosmetic application tool. Figure 3 (a) and Figure 3 The mechanism of the liquid cosmetic application tool in (b) is an example of a collector-type application tool mechanism. Detailed Implementation

[0028] Water-based liquid cosmetics

[0029] The water-based liquid cosmetic of the present invention is a cosmetic contained in a pen-shaped application tool. The water-based liquid cosmetic contains: titanium dioxide pigment, polyorganic acid or polyorganic acid salt, emulsion particles containing acrylic (ester) copolymers, and a water-based solvent, wherein the mass ratio of the aforementioned titanium dioxide pigment to the aforementioned polyorganic acid or polyorganic acid salt is greater than 5.

[0030] In existing water-based liquid cosmetics containing titanium dioxide pigments, the pigments tend to settle and aggregate, so they are usually used in relatively small amounts. It is assumed that in the case of large-scale use, the viscosity needs to be increased to a level unsuitable for use as a liquid cosmetic.

[0031] In contrast, the inventors have discovered that in the aqueous liquid cosmetic of the present invention, by containing a small amount of polyorganic acid or polyorganic acid salt relative to the titanium dioxide pigment—that is, by making the mass ratio of the titanium dioxide pigment to the aforementioned polyorganic acid or polyorganic acid salt greater than 5—good liquid flowability is maintained, and redispersion within the application tool can be easily achieved, for example, by means of the stirring body of the application tool. Therefore, sedimentation and aggregation of the titanium dioxide pigment (after dispersion) in the aqueous liquid cosmetic can be suppressed. As a result, an aqueous liquid cosmetic suitable for application tools such as eyeliner pens with a brush-shaped application portion can be obtained.

[0032] The mass ratio of titanium dioxide pigment to polyorganic acid or polyorganic acid salt can be greater than 5.0 and less than 100.0. From the viewpoint of achieving good viscosity in aqueous liquid cosmetics, this ratio is preferably greater than 5.0, 5.5 or more, 6.0 or more, 6.5 or more, 7.0 or more, 7.5 or more, 8.0 or more, 8.5 or more, or 9.0 or more. From the viewpoint of achieving good dispersion stability of titanium dioxide pigment, this ratio is preferably less than 100.0, less than 90.0, less than 80.0, less than 70.0, less than 60.0, less than 50.0, less than 45.0, less than 40.0, less than 35.0, less than 30.0, less than 25.0, less than 20.0, less than 15.0, less than 14.0, less than 13.5, or less than 13.0.

[0033] The water-based liquid cosmetic of the present invention may contain any nonionic surfactant, or may not contain any. When the water-based liquid cosmetic of the present invention does not contain a nonionic surfactant, it tends to exhibit improved color development and resistance to drying after opening.

[0034] The aqueous liquid cosmetic of the present invention may contain any other ingredients. These other ingredients may include, for example, preservatives, antioxidants, neutralizing agents, ultraviolet absorbers, chelating agents, pH adjusters, moisturizers, cosmetic ingredients, food flavorings, viscosity modifiers, polyethylene glycol alkyl ethers, and other dispersants, water-soluble dyes, resin particles, pigments, and other coloring materials. The content of these other ingredients may be appropriately determined without impairing the effects of the present invention.

[0035] The viscosity of the aqueous liquid cosmetic of the present invention can be 2 mPa·s or higher and 15 mPa·s or lower. From the viewpoint of ensuring good flowability of the aqueous liquid cosmetic, the viscosity is preferably 15 mPa·s or lower, 12 mPa·s or lower, 10 mPa·s or lower, 9 mPa·s or lower, 8 mPa·s or lower, or 7 mPa·s or lower. The viscosity can be 2 mPa·s or higher, 3 mPa·s or higher, or 4 mPa·s or higher.

[0036] The viscosity range mentioned above can be adjusted by adjusting the average particle size of the pigment used, the type and content of each component, and the dispersion method.

[0037] It should be noted that, in this invention, the viscosity is measured at a shear rate of 50 rpm (shear rate: 192 s). -1 The viscosity is measured at 25°C. This viscosity can be determined, for example, using an ELD type viscometer (Toki Sangyo Co., Ltd.).

[0038] Furthermore, considering improvements in solubility and inhibition of skin irritation, the pH of the water-based liquid cosmetic of the present invention is preferably in the range of 6 or higher and 9 or lower when measured using a glass electrode (at 25°C). pH can be adjusted using the aforementioned pH adjuster or the like.

[0039] The aqueous liquid cosmetic of the present invention can be made by dispersing titanium dioxide pigment, polyorganic acid or polyorganic acid salt, emulsion particles containing acrylic (ester) copolymers, aqueous solvent and any other ingredients under known dispersion conditions.

[0040] As a dispersion method, dispersers such as homogenizers, sand mills, ultrasonic homogenizers, and high-pressure homogenizers can be used. In particular, according to these dispersion methods, the average particle size of titanium dioxide pigments (after dispersion) in cosmetics can be adjusted to below 300 nm. Here, in this invention, "average particle size" refers to the value of the histogram average particle size (D50) calculated from the scattering intensity distribution measured by dynamic light scattering method using a volume reference.

[0041] For example, when using an ultrasonic homogenizer as a disperser, dispersion conditions with a frequency of 20–30 kHz can be adopted. Alternatively, when using a high-pressure homogenizer as a disperser, dispersion conditions with a pressure of 150–245 MPa can be adopted. These dispersion conditions allow the average particle size of (dispersed) titanium dioxide pigments in cosmetics to be adjusted to below 300 nm.

[0042] The water-based liquid cosmetic of the present invention can be used as cosmetics such as eyeshadow, eyeliner, eyebrow pencil, and mascara.

[0043] The constituent elements of the water-based liquid cosmetic of the present invention will be described below.

[0044] Titanium oxide pigments

[0045] As titanium dioxide pigments, not only pigments containing more than half titanium dioxide can be used, but also pigments with titanium dioxide coating on the surface, pigments with titanium dioxide as the base particles and coated with resin and / or coloring materials other than titanium dioxide, etc.

[0046] Commercially available titanium dioxide pigments, as well as titanium black, mica titanium, titanium dioxide-coated mica, titanium dioxide-coated synthetic phlogopite, titanium dioxide-coated bismuth oxychloride, iron oxide-coated mica titanium, Prussian blue-treated mica titanium, carmine-treated mica titanium, and titanium dioxide-coated glass powder, can be used. These titanium dioxide pigments can be used alone or in combination.

[0047] The content of titanium dioxide pigment relative to the mass of the water-based liquid cosmetic can be 1% or more and 25% or less by mass. From the viewpoint of achieving good color development and hiding power, this content is preferably 1% or more by mass, 2% or more by mass, 3% or more by mass, 4% or more by mass, 5% or more by mass, 6% or more by mass, 7% or more by mass, 8% or more by mass, 9% or more by mass, 10% or more by mass, 11% or more by mass, 12% or more by mass, 13% or more by mass, 14% or more by mass, 15% or more by mass, 16% or more by mass, or 17% or more by mass. From the viewpoint of not excessively increasing the viscosity of the water-based liquid cosmetic and obtaining good spreadability, this content is preferably 25% or less by mass, 24% or less by mass, 23% or less by mass, 22% or less by mass, 21% or less by mass, or 20% or less by mass.

[0048] Furthermore, in the case where the aqueous liquid cosmetic of the present invention contains pigments other than titanium dioxide pigment, the content of titanium dioxide pigment relative to the total mass of titanium dioxide pigment and pigments other than titanium dioxide pigment can be 5% by mass and less than 100% by mass. This content can be 5% by mass or more, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, 30% by mass or more, 35% by mass or more, 40% by mass or more, 45% by mass or more, 48% by mass or more, 50% by mass or more, 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, 75% by mass or more, 80% by mass or more, or 85% by mass or more. This content can also be less than 100% by mass, less than 99% by mass, less than 98% by mass, less than 97% by mass, or less than 96% by mass.

[0049] The average particle size of titanium oxide before dispersion can be 100 nm or more and 500 nm or less. For example, the average particle size can be 100 nm or more, 150 nm or more, 200 nm or more, 220 nm or more, 250 nm or more, or 270 nm or more. Alternatively, it can be 500 nm or less, 450 nm or less, 420 nm or less, 400 nm or less, 370 nm or less, 350 nm or less, or 320 nm or less.

[0050] <Polyorganic acids or polyorganic acid salts>

[0051] By using polyorganic acids and polyorganic acid salts, the dispersibility of titanium dioxide pigments used as coloring materials can be improved.

[0052] As a polyorganic acid, for example, at least one selected from the group consisting of polyaspartic acid, polylactic acid, polyphosphate, polyacrylic acid, and polyglutamic acid can be used.

[0053] As a polyorganic acid salt, at least one of the following can be used: polyorganic acids selected from the group consisting of salts of polyaspartic acid, polylactic acid, polyphosphate, polyacrylic acid, and polyglutamic acid. As types of these salts, alkali metal salts, alkaline earth metal salts, ammonium salts, alkanolamine salts, etc., can be used, with sodium salts, potassium salts, and lithium salts being particularly preferred.

[0054] Among these polyorganic acids or polyorganic acid salts, polyaspartic acid or its salts in particular can bring good dispersion stability to titanium dioxide pigments, with sodium polyaspartic acid being especially preferred.

[0055] The total content of these polyorganic acids and polyorganic acid salts relative to the mass of the aqueous liquid cosmetic can be 0.2% by mass or more and 4.0% by mass or less. This content can be 0.2% by mass or more, 0.4% by mass or more, 0.6% by mass or more, 0.8% by mass or more, 1.0% by mass or more, or less than 4.0% by mass, less than 3.8% by mass, less than 3.6% by mass, less than 3.4% by mass, less than 3.2% by mass, less than 3.0% by mass, less than 2.8% by mass, less than 2.6% by mass, less than 2.4% by mass, less than 2.2% by mass, or less than 2.0% by mass.

[0056] Furthermore, the total mass of these polyorganic acids and polyorganic acid salts can be 2 parts by mass or more and 20 parts by mass or less relative to 100 parts by mass of the pigment. From the viewpoint of ensuring good dispersion stability of the pigment, especially titanium dioxide pigment, this total mass is preferably 2 parts by mass or more, 3 parts by mass or more, 4 parts by mass or more, 5 parts by mass or more, 6 parts by mass or more, 7 parts by mass or more, or 8 parts by mass or more. From the viewpoint of achieving a good viscosity range for water-based liquid cosmetics, and from the viewpoint of suppressing pigment sedimentation when contained in a pen-shaped application tool having a pen tip or pen core, this total mass is preferably 20 parts by mass or less, 18 parts by mass or less, 15 parts by mass or less, 13 parts by mass or less, 12 parts by mass or less, or 11 parts by mass or less.

[0057] <Emulsion particles>

[0058] The emulsion particles used in this invention are emulsion particles comprising acrylic (ester) copolymers. Such emulsion particles are also known as film-forming polymer emulsion particles.

[0059] As such emulsion particles, water-insoluble polymeric emulsions can be used, such as styrene-alkyl acrylate copolymer emulsions, styrene-alkyl methacrylate copolymer emulsions, copolymer emulsions composed of acrylic acid, methacrylic acid, or their (C1-C4 and C8) alkyl esters, etc.

[0060] Alternatively, emulsion particles of composite polymers, such as core-shell polymer emulsions formed from copolymers of olefinic unsaturated carboxylic acid monomers and styrene monomers with other polymers and / or copolymers, can also be used as such emulsion particles.

[0061] As the styrene-alkyl acrylate copolymer emulsion mentioned above, styrene / acrylate (ester) copolymers can be used. Commercially available products of this polymer include Yodosol GH41F (Nouryon Japan KK Corporation) and Daitosol 5000S TY (Daito Kasei Corporation).

[0062] In addition, as a specific example of an emulsion of a core-shell polymer emulsion formed by copolymers of olefinic unsaturated carboxylic acid monomers and styrene monomers with other polymers and / or copolymers, EMAPOLYOL-CE-119N (GISHELLIGH CO., LTD.) is an emulsion of a core-shell copolymer of ethylhexyl acrylate / methacrylic acid copolymer [acrylate (ester) / methylstyrene / styrene copolymer ammonium].

[0063] From the viewpoint of film-forming properties and the adhesion of lines, it is preferable to include acrylic (ester) copolymers, and more preferably the above-mentioned core-shell polymer emulsions.

[0064] These emulsion particles are typically formed by finely dispersing the resin component, based on a concentration of 20-60% by mass (solids), within the aqueous component. The content of these particles, relative to the mass of the aqueous liquid cosmetic (converted from solids), can be 1% by mass or more and 30% by mass or less. From the viewpoint of achieving good adhesion and water resistance, this content is preferably 1% by mass or more, 2% by mass or more, 3% by mass or more, 4% by mass or more, or 5% by mass or more. From the viewpoint of avoiding excessive viscosity in the aqueous liquid cosmetic and thus achieving good spreadability, this content is preferably 30% by mass or less, 25% by mass or less, 20% by mass or less, 15% by mass or less, 12% by mass or less, 10% by mass or less, 9% by mass or less, 8% by mass or less, or 7% by mass or less.

[0065] <Aqueous Solvents>

[0066] The aqueous solvent used in this invention is a solvent in which water is the main component at a content of 50% to 100% by mass, for example, 50% to 60% by mass, 65% to 70% by mass, 75% to 80% by mass, or 82% by mass, relative to the mass of the aqueous solvent. The aqueous solvent may consist solely of water, or it may further contain organic solvents. When the aqueous solvent contains organic solvents, the water content relative to the mass of the aqueous solvent may be less than 100% by mass, 99% to 99% by mass, 95% to 90% by mass, or 87% to 87% by mass. Based on the above water content, good long-term stability and good dispersibility of the titanium dioxide pigment can be achieved.

[0067] In particular, the aqueous solvent used in this invention may contain water and at least one alcohol selected from the group consisting of lower alcohols with 10 or fewer carbon atoms and polyols with 10 or fewer carbon atoms.

[0068] As water, it can be distilled water, ion-exchange water, purified water, pure water, ultrapure water, etc.

[0069] As a lower alcohol with 5 or fewer carbon atoms, specifically, at least one of methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, isobutanol, pentanol, ethylene glycol, propylene glycol, etc. can be used.

[0070] In addition, polyols with fewer than 10 carbon atoms can be used, such as glycerol, erythritol, threitol, arabinitol, xylitol, ribitol, maltitol, lactitol, mannitol, propylene glycol, 1,3-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, ethylene glycol, diethylene glycol, dipropylene glycol, pentaerythritol, ethylhexylglycerol, etc.

[0071] Among these, 1,3-butanediol is preferred due to its safety and operability considerations.

[0072] The total content of the aqueous solvents used can be 45% by mass or more and 85% by mass or less relative to the mass of the aqueous liquid cosmetic. From the viewpoints of providing smooth application and moisturizing properties, and from the viewpoints of providing preservative effects even in trace amounts, this total content is preferably 45% by mass or more, 50% by mass or more, 55% by mass or more, 60% by mass or more, or 63% by mass. From the viewpoints of ensuring good dispersion stability of titanium dioxide pigments, especially good stability at low temperatures, this total content is preferably 85% by mass or less, 80% by mass or less, or 77% by mass or less.

[0073] Pigments other than titanium dioxide pigments

[0074] Besides titanium dioxide pigments, other types of pigments, such as inorganic coloring pigments, inorganic extender pigments, and inorganic gloss pigments, as well as organic pigments, can be used. These pigments can be used alone or in combination.

[0075] As inorganic coloring pigments, carbon black, iron oxides, titanium black, zinc oxide, talc, chromium oxide green, cobalt oxide, zinc oxide, mica titanium, bismuth oxychloride, ultramarine, ferric ammonium ferrocyanide, etc. can be used.

[0076] As inorganic pigments, such as talc, muscovite, phlogopite, ruby, biotite, synthetic mica, sericite, synthetic sericite, kaolin, silicon carbide, montmorillonite, alumina, magnesium oxide, zirconium oxide, antimony oxide, diatomaceous earth, aluminum silicate, magnesium aluminum metasilicate, calcium silicate, barium silicate, magnesium silicate, calcium carbonate, magnesium carbonate, hydroxyapatite, boron nitride, and silicon dioxide can be used.

[0077] As inorganic bright pigments, iron oxides can be used to coat mica, bismuth oxychloride, fish scale foil, aluminum powder, etc.

[0078] As organic pigments, for example, Red 202, Red 220, Red 226, Red 228, Yellow 401, Yellow 205, Yellow 4 Al Lake, Yellow 203 Al Lake, Red 104 Al Lake, etc. can be used.

[0079] In particular, the aforementioned inorganic and organic pigments can be used as coloring materials. For example, when using carbon black, it can be combined with the aforementioned titanium dioxide pigment to achieve a gray tone. Furthermore, commercially available pigment mixtures containing carbon black can be used without particular limitation, as long as they are pigment mixtures used in liquid cosmetics.

[0080] The average particle size of these pigments before dispersion can be greater than 100 nm and less than 20,000 nm. For example, the average particle size can be less than 20,000 nm, less than 15,000 nm, less than 10,000 nm, less than 8,000 nm, less than 5,000 nm, less than 3,000 nm, less than 2,000 nm, less than 1,800 nm, less than 1,500 nm, less than 1,300 nm, less than 1,200 nm, less than 1,100 nm, less than 1,000 nm, less than 900 nm, or less than 800 nm. Alternatively, it can be greater than 100 nm, greater than 200 nm, greater than 300 nm, greater than 400 nm, greater than 500 nm, or greater than 600 nm.

[0081] The content of these pigments, excluding titanium dioxide pigments, relative to the mass of the water-based liquid cosmetic can be 0% or more and 18% or less by mass. This content can be 0% or more by mass or 1% or more by mass, or it can be 18% or less by mass, 15% or less by mass, 12% or less by mass, 10% or less by mass, or 9% or less by mass.

[0082] <Nonionic surfactants>

[0083] As nonionic surfactants, surfactants such as those formed by ether bonding of polyoxyethylene (POE) with organic acids, glycerol, and higher alcohols can be used. Among these, polyoxyethylene (POE) alkyl ethers such as lauryl alcohol polyether (polyoxyethylene lauryl ether), cetyl alcohol polyether (polyoxyethylene cetyl ether), stearyl alcohol polyether (polyoxyethylene stearyl ether), and behenyl alcohol polyether (polyoxyethylene behenyl ether) are preferred. These nonionic surfactants can be used alone or in combination.

[0084] From the perspective of their molecular structure and hydrophilicity, POE(20) cetyl ether (cetyl alcohol polyether-20), POE(30) behenyl ether (behenyl alcohol polyether-30), POE(20) stearyl ether, and POE(10) oil ether are preferred.

[0085] From the perspective of inhibiting excessive penetration into the skin (the so-called cobweb effect) and the dispersion stability of titanium dioxide pigments, the content of the nonionic surfactant used can be 0.01% by mass or more and 1.00% by mass or less relative to the mass of the aqueous liquid cosmetic. This content is preferably 0.01% by mass or more, 0.03% by mass or more, 0.05% by mass or more, 0.07% by mass or more, or 0.09% by mass or more, and more preferably 1.00% by mass or less, 0.90% by mass or less, 0.80% by mass or less, 0.70% by mass or less, 0.60% by mass or less, 0.50% by mass or less, 0.40% by mass or less, 0.35% by mass or less, or 0.30% by mass or less.

[0086] Smearing Tool

[0087] The application tool of the present invention is a pen-shaped application tool that contains the above-mentioned water-based liquid cosmetic.

[0088] In particular, the application tool of the present invention may have a front shaft with an application section and a cylindrical section with a storage section. The aforementioned water-based liquid cosmetic is stored (filled) in the storage section.

[0089] The application tool of the present invention is not particularly limited to any cosmetic application tool. In particular, the specific method of application tool described with reference to the accompanying drawings can be used as an eyeliner or eyebrow pencil. Furthermore, the application tool of the present invention can also be used for eyeshadow, mascara, etc. It can also be an application tool for other purposes.

[0090] The application tool of the present invention may be, for example, a rotary extraction type (…). Figure 1 ), push-button type (not shown), cosmetic built-in type ( Figure 2 ) or collector type ( Figure 3 (This is a smearing tool.)

[0091] The components of the application tool of the present invention will be described below.

[0092] Front axle section

[0093] The front axle section has a coating section. The front axle section can be formed with a removable cover.

[0094] In addition, to facilitate the supply of aqueous liquid cosmetics from the shaft section to the application section, the front shaft section may also have a core. This core may be composed of capillary components such as synthetic resin fiber bundles, natural fiber bundles, or resin porous bodies.

[0095] (Apply to the area)

[0096] The application part can be in the shape of a pen tip, a pen core, or other application bodies. In particular, when the application part is in the shape of a pen tip, the application tool of the present invention is useful as an eyeliner or eyebrow pencil.

[0097] When the coating part is in the form of other coating bodies, the coating part may be composed of rubber, elastomer or independent air bubbles with resilience.

[0098] When the coating part is pen-shaped, the coating part can be obtained, for example, by making the tip tip thinner, aligning (sharpening) multiple resin fiber bundles to form a pen shape, and integrating the rear end by heating and welding and expanding it into a flange shape.

[0099] When the application part is in the shape of a pen core, the application part can be composed of fiber bundles or a porous body made of resin.

[0100] The fibers constituting the coating can be synthetic fibers or natural fibers. Synthetic fibers can be, for example, polybutylene terephthalate (PBT). The fiber thickness can be 0.10 mm or more and 0.15 mm or less. It can be 0.10 mm or more, or 0.11 mm or more, or 0.15 mm or less, or 0.14 mm or less.

[0101] <Shaft section>

[0102] The shaft section has a storage compartment. The aforementioned water-based liquid cosmetic is stored in this storage compartment.

[0103] (Storage Department)

[0104] The storage compartment can be a hollow shape capable of being filled with water-based liquid cosmetics, or it can be a cotton wick shape capable of being soaked in water-based liquid cosmetics. When the storage compartment is hollow, the application tool is sometimes called a "direct liquid application tool." When the storage compartment is a cotton wick shape, the application tool is sometimes called a "cotton wick application tool."

[0105] Furthermore, if the storage compartment is hollow, a stirring element can be stored within it. The stirring element can be in the form of a ball, rod, or similar material. Additionally, the stirring element can be made of metal or resin.

[0106] <cover>

[0107] A cap is a component used to cover the application area when not in use. The cap may have an inner cap and a spring. The inner cap is a cup-shaped component that is movable back and forth to improve the airtightness of the application area. The spring is a component used to apply a rearward force to the inner cap.

[0108] <Other Components>

[0109] For any other configurations constituting the application tool of the present invention, please refer to the following detailed description. These configurations may be resin molded articles.

[0110] The specific method of applying the applicator will now be described with reference to the accompanying drawings. Any configuration of the applicator according to the present invention can be referred to the following description as appropriate.

[0111] The first method of application tools: rotary pull-out type ( Figure 1 )

[0112] like Figure 1 As shown, the rotary-type applicator 100 sprays the water-based liquid cosmetic of the present invention onto the pen-shaped applicator section 111 via a liquid pressing mechanism 130. This method can be used as a direct-liquid eyeliner. A storage section 121 for storing the water-based liquid cosmetic is located in front of the liquid pressing mechanism 130, and the applicator section 111 is positioned in front of it.

[0113] The liquid pressing mechanism 130 extracts the water-based liquid cosmetic from the storage section 121 and supplies it to the application section 111 by rotating the extraction member 131 disposed at the rear end of the shaft section 120 relative to the shaft section 120 in a circumferential direction.

[0114] The liquid pressing mechanism 130 of the application tool 100 includes an extraction member 131, a screw 132, a drive cylinder 133, a threaded body 134, and a piston body 135. The extraction member 131 is rotatably fitted into the rear end of the shaft cylinder portion 120. The drive cylinder 133 transmits the rotational force generated by the user on the extraction member 131 to the screw 132. The threaded body 134 is fixed to the shaft cylinder portion 120 and screwed into the screw 132. The piston body 135 is rotatably engaged at the top end of the screw 132. The piston body slides within the receiving portion 121 of the shaft cylinder portion 120. The rotation of the extraction member 131 is transmitted to the screw 132 via the drive cylinder 133. Through the rotation of the screw 132, the screw 132 and the piston body 135 are pushed forward via the internal thread of the nut-shaped threaded body 134, thereby spraying the water-based liquid cosmetic from the receiving portion 121 into the application portion 111.

[0115] like Figure 1 As shown, the extraction member 131 is exposed in a state where it is rotatably embedded in the rear end of the shaft cylinder portion 120. A crown portion 131a is embedded at its rear end, thereby giving the extraction member 131 an operable closed cylindrical shape. A drive cylinder 133 is embedded in the extraction member 131 and fixed in the rotational direction. A threaded body 134 is installed in the drive cylinder 133, which is fixed in the rotational direction relative to the drive cylinder 133 and is capable of axial movement relative to it. A spring member 131b can apply a rearward force to the extraction member 131, which is a rotating body.

[0116] It should be noted that "fixed in the direction of rotation" means that when a component is installed on other components, the component is fixed in a way that does not rotate relative to the other components.

[0117] In this application tool, a sealing part 113, a connector member 114, a front shaft part 110, and an application part 111 are embedded in the top end 120a of the shaft cylinder part 120. Aqueous liquid cosmetics are stored in the storage part 121 of the shaft body 120. Aqueous liquid cosmetics drawn from the storage part 121 are sprayed onto the application part 111 through the flow path within the connector member 114 for application. After use, a cap 40 can be attached to the front shaft part 110 to cover both the application part 111 and the front shaft part 110.

[0118] In addition, such as Figure 1 As shown, the shaft cylinder 120 may have a stirring ball 122 inside the storage section 121, thereby enabling the reciprocating motion of water-based liquid cosmetics. In addition, the cover 140 may have an inner cover 141 disposed inside it, and a spring 142 capable of applying a rearward force to the inner cover 141.

[0119] Furthermore, when not in use (during circulation), in order to seal the flow path of the water-based liquid cosmetic toward the application part 111, the application tool of the first type may have a stop 150 and a sealing ball 112.

[0120] The stop member 150 has an annular portion that, when not in use, is positioned between the rear end of the front axle portion 110 and the front surface of the stepped portion 120a of the top end portion of the shaft sleeve portion 120. The stop member 150 fixes the positions of the sealing portion 113, the connector member 114, the front axle portion 110, and the application portion 111, and is capable of blocking the flow path of water-based liquid cosmetics toward the application portion 111.

[0121] A portion of the annular portion of the stop 150 is cut off, and a pinch piece can be integrally formed on the opposite side of the cut portion. When the pinch piece is pulled, the annular portion expands in diameter from the separation portion, and can be removed from between the rear end of the front axle portion 110 and the top end portion 120a of the shaft body 120.

[0122] When not in use, the sealing ball 112 is embedded in the inner diameter of the sealing part 113, thereby preventing water-based liquid cosmetics from flowing into the application part 111.

[0123] In use, the user pulls the stop 150 out of the shaft sleeve 120 and presses the front shaft 110 towards the rear end. This causes the narrower rear end of the connector member 114 to abut against the sealing ball 112, disengaging the sealing ball 112 from the inner diameter of the sealing portion 113 and pressing it into the storage portion 121. This allows the water-based cosmetic product within the storage portion 121 to flow from the inner diameter of the connector member 114 into the liquid flow path of the application portion 111, supplying it from within and enabling application to the target area.

[0124] The second method of application tools: the type of cosmetic built-in application tool ( Figure 2 )

[0125] like Figure 2 As shown, the cosmetic-in-place application tool 200 has a structure that supplies a water-based liquid cosmetic product from inside the shaft portion 220 to the application portion 211. This application tool 200 includes a shaft portion 220, a front shaft portion 210, an application portion 211, and a retaining member 212. The shaft portion 220 stores the water-based liquid cosmetic product in a cotton-wick-like storage portion 221 by soaking. The application portion 211 is provided on the front shaft portion 210 and can apply the water-based liquid cosmetic product to an object. The retaining member 212 is a member that retains the top end 211a of the application portion 211 and covers the outer periphery of the shaft portion 220 side (base side) of the application portion 211. This application tool 200 may have a cap 240 detachably formed on the front shaft portion 210, thereby covering the application portion 211 and the retaining member 212.

[0126] The cotton core-shaped storage part 221 is stored from the central part inside the shaft cylinder 220 to the front shaft part 210, and is sealed and supported by the tail bolt 222 inserted from the rear end of the shaft cylinder 220.

[0127] A core 213 is disposed in the opening of the front shaft portion 210. This core may be composed of a continuous air bubble. The tail end of the core 213 is embedded in the top end of the receiving portion 221. On the other hand, the top end of the core 213 is embedded in the tail end of the application portion 211, thereby guiding the ink stored in the receiving portion 211 to the application portion 211. In addition, the diameter of the front shaft portion 210 is slightly smaller than that of the shaft cylinder portion 220 (the small diameter corresponding to the thickness of the cap 240), thereby creating a height difference between the two portions. The core 213 is mounted inside the front shaft portion 210 via a generally cylindrical support 214. The cylindrical rear end of the retaining member 212 is embedded between the outer periphery of the support 214 and the inner periphery of the front shaft portion 210.

[0128] The top end of the retaining member 212 is positioned further forward than the front axle portion 210 and covers the outer peripheral surface 211b of the coating portion 211. The outer peripheral surface 212a of the retaining member 212 has a conical side profile or tapers to a tapered tip.

[0129] Third-Party Smearing Tools: Collector-Style Smearing Tools Figure 3 )

[0130] like Figure 3 As shown in (b), the collector-type applicator 300 has a collector 312 disposed at the front of the cylindrical portion 320 and a storage portion 321 housed within the cylindrical portion 320. The collector 312 has multiple individual pieces arranged axially in a comb-like manner. Figure 3 As shown in (a), the front axle portion 310 is fitted with the shaft sleeve portion 320 on the rear side of the front axle portion 310.

[0131] The shaft sleeve portion 320 is formed as a tube with internal communication and openings at both ends. A tail plug 323 is fitted into the rear of the shaft sleeve portion 320, thereby closing the rear of the shaft sleeve portion 320. Thus, the shaft sleeve portion 320, held by the top end of the tail plug 323 and the rear end of the collector 312, becomes the storage portion 321.

[0132] The storage section 321 does not contain a cotton core or other impregnating material, but directly contains water-based liquid cosmetics, and is equipped with a stirring body (ball, etc.) 322 for stirring the water-based liquid cosmetics.

[0133] The collector 312 has a structure that is covered and held by the front shaft portion 310 and the shaft sleeve portion 320.

[0134] A pointed, cone-shaped applicator 311 protrudes from the opening at the top of the front axle portion 310. The front axle portion 310 has a generally conical side profile and is formed to be pointed, and the top angle of the front axle portion 310 can be formed to be approximately the same as the top angle of the applicator 311.

[0135] The cover can be detachably fitted onto the front axle portion 310, thereby covering the coating portion 311.

[0136] Inside the hollow, tapered front axle portion 310, a corrugated collector 312 is disposed behind the coating portion 311, and a core 313 is disposed through the hollow portion of the collector 312.

[0137] The core 313 does not protrude from the rear end of the collector 312 into the receiving portion 321 of the shaft cylinder portion 320 (see reference). Figure 3 (b) The rear end face of the collector 312 and the rear end face of the core 313 are approximately on the same plane, so that the rear end of the core 313 does not protrude into the receiving portion 321. This ensures sufficient volume within the receiving portion 321. Furthermore, when the stirring body 322 is placed within the receiving portion 321, it will not collide with the core 313 even if it moves within the receiving portion 321. This suppresses deformation of the core 313, resulting in sufficient penetration of the coating liquid.

[0138] Example

[0139] The present invention will be specifically described through examples and comparative examples, but the present invention is not limited thereto.

[0140] The Production of Water-Based Liquid Cosmetics

[0141] Titanium oxide pigment and polyorganic acid or polyorganic acid salt were added to purified water in the amounts shown in Table 1 and dispersed using a disperser (LABSTAR, Ashizawa Finetech). After confirming that the average particle size of the titanium oxide pigment was 300 nm, the other ingredients listed in Table 1 were added and mixed to produce a water-based liquid cosmetic.

[0142] The details of the materials mentioned in *1 to *9 of Table 1 are as follows.

[0143] *1: CR-50, Ishihara Sangyo Co., Ltd.

[0144] *2: TALOX ABL-412HP / R-516P, Titan Kogyo, Ltd.

[0145] *3: The above CR-50 and TALOX ABL-412HP contain...

[0146] *4: DK BLACK No.2, Daito Chemical Industry Co., Ltd.

[0147] *5: Ethylhexyl acrylate / methyl methacrylate copolymer [acrylates / methylstyrene / styrene copolymer ammonium] (Emapoly CE-119N, Gifu Shellac Manufacturing Co., Ltd., solids content 47%)

[0148] *6: DERMACRYL AQF, Nouryon Japan KK

[0149] *7: AQUADEW SPA-30B, AJINOMOTO HEALTHY SUPPLY CO., INC.

[0150] *8: Jurimer AC-10SL, Dong-A Synthetic Co., Ltd.

[0151] *9: DDP-10, Nikko Chemicals Co., Ltd.

[0152] The pH of the prepared water-based liquid cosmetic was measured using a glass electrode pH meter at 25°C. Additionally, a viscometer (ELD type, Toki Sangyo Co., Ltd.) was used at 25°C and a rotation speed of 50 rpm (shear rate 192 [s]). -1 The viscosity of the prepared water-based liquid cosmetic was determined under the following conditions.

[0153] "evaluate"

[0154] Fill the prepared water-based liquid cosmetic into such Figure 1 The application tools shown are used to create a direct liquid eyeliner.

[0155] <Color development (freshly made)>

[0156] Apply the water-based liquid cosmetic to the skin and visually confirm the appearance of the outline. The evaluation criteria are as follows.

[0157] A: The color rendering is excellent.

[0158] B: Good color rendering.

[0159] C: The color rendering is not very good.

[0160] D: Color rendering difference.

[0161] <Color development (after 1 week of storage)>

[0162] After storing the application tool with the cap facing up for one week, apply the water-based liquid cosmetic to the skin and visually confirm its appearance.

[0163] A: The color rendering is excellent.

[0164] B: Good color rendering.

[0165] C: Becomes observable transparent, but color rendering is poor.

[0166] D: Transparency and color difference can be observed.

[0167] <Liquid effusion>

[0168] Apply water-based liquid cosmetics to the skin and visually inspect the flow of the outline. The evaluation criteria are as follows.

[0169] A: The flow rate is fine, it's moisturizing, and the application is good.

[0170] B: Although a decrease in flow was observed, there were no problems with application, and the application area was not damaged.

[0171] C: There was a decrease in flow rate, and slight defects were observed in the application area.

[0172] <Prevents drying when the lid is open>

[0173] After leaving the skin with the cap removed for 10 minutes, apply the water-based liquid cosmetic to the skin and evaluate the appearance of the outline. The evaluation criteria are as follows.

[0174] A: No dry whitening, good application.

[0175] B: A small amount of white residue was observed, and slight defects were observed in the applied area.

[0176] C: White spots appeared, and large defects were observed in the applied area.

[0177] D: Significant whitening, application area not identifiable.

[0178] <Fixation>

[0179] Apply water-based liquid cosmetics to the skin, trace lines with your fingertips, and evaluate adhesion. The evaluation criteria are as follows.

[0180] A: There are no changes in the outline caused by rubbing with the fingertip.

[0181] B: By rubbing with the fingertip, a slight change was observed in the tracing lines.

[0182] C: Significant changes were observed in the tracing lines by rubbing with the fingertips.

[0183] <Water resistance>

[0184] Apply water-based liquid cosmetics to the skin, then run water over the lines and rub the lines with your fingertips to evaluate water resistance and adhesion. The evaluation criteria are as follows.

[0185] A: There are no changes in the outline caused by rubbing with the fingertip.

[0186] B: By rubbing with the fingertip, a slight change was observed in the tracing lines.

[0187] C: Significant changes were observed in the tracing lines by rubbing with the fingertips.

[0188] <Sebum Resistance>

[0189] A water-based liquid cosmetic was applied to the skin to allow artificial sebum to adhere to the liner. The liner was then wiped away with a fingertip to evaluate its sebum resistance. The evaluation criteria are as follows.

[0190] A: No changes in the tracing caused by rubbing with the fingertip were observed.

[0191] B: No slight changes were observed in the tracing lines when rubbing with the fingertip.

[0192] C: Significant changes were observed in the tracing lines by rubbing with the fingertips.

[0193] The configuration and evaluation results of the embodiments and comparative examples are shown in Tables 1 and 2.

[0194] [Table 1]

[0195]

[0196] [Table 2]

[0197]

[0198] As can be understood from Table 1, the cosmetics of Examples 1-9 exhibited extremely good color development after one week compared to the cosmetics of Comparative Examples 1-4. Furthermore, regarding color development, liquid flowability, anti-drying properties after opening, adhesion, sebum resistance, and water resistance, it can be understood that the cosmetics of Examples 1-9 achieved results equivalent to or better than those of Comparative Examples 1-4.

[0199] Explanation of reference numerals in the attached figures

[0200] 100, 200, 300 Smearing Tools

[0201] 110, 210, 310 Front axle section

[0202] 111, 211, 311 Application area

[0203] 112 Sealed Ball

[0204] 113 Sealing section

[0205] 114 Joint components

[0206] 120, 220, 320 shaft cylinder section

[0207] The top end of the 120a shaft section

[0208] Storage Departments 121, 221, and 321

[0209] 122 Mixing Ball

[0210] 130 Liquid Press Mechanism

[0211] 131 Extraction Component

[0212] 131a Crown

[0213] 131b Spring component

[0214] 132 screw

[0215] 133 Drive Cylinder

[0216] 134 Threaded body

[0217] 135 Piston Body

[0218] 140, 240 caps

[0219] 141 Inner Cover

[0220] 142 Spring

[0221] 150 stop component

[0222] 211a Top of the application section

[0223] 211b Outer peripheral surface of the coating section

[0224] 212 Retaining component

[0225] 212a Retain the outer periphery of the component

[0226] 213 SMIC

[0227] 214 Support body

[0228] 222 tail bolt

[0229] 312 Collector

[0230] 313 SMIC

[0231] 322 Mixing Component

[0232] 323 Tail bolt.

Claims

1. A water-based liquid cosmetic product, contained in a pen-shaped application tool. The aqueous liquid cosmetic contains: titanium dioxide pigment, polyorganic acid or polyorganic acid salt, emulsion particles containing acrylic (ester) copolymers, and an aqueous solvent. The mass ratio of the titanium dioxide pigment to the mass of the polyorganic acid or polyorganic acid salt exceeds 5.

2. The water-based liquid cosmetic according to claim 1, wherein, The content of the titanium dioxide pigment is more than 10% by mass relative to the total content of the water-based liquid cosmetic.

3. The water-based liquid cosmetic according to claim 1 or 2, wherein, The polyorganic acid or the polyorganic acid salt is at least one selected from the group consisting of polyaspartic acid, polylactic acid, polyphosphate and polyacrylic acid, or a salt thereof.

4. The water-based liquid cosmetic according to claim 1 or 2, wherein, The emulsion particles containing acrylic (ester) copolymers are core-shell type emulsion particles.

5. The water-based liquid cosmetic according to claim 1 or 2, wherein, The aqueous solvent contains water and at least one alcohol selected from the group consisting of lower alcohols with 5 or fewer carbon atoms and polyols with 10 or fewer carbon atoms.

6. The water-based liquid cosmetic according to claim 1 or 2, further comprising pigments other than the titanium dioxide pigment.

7. The water-based liquid cosmetic according to claim 6, wherein, The content of the titanium dioxide pigment is 45% by mass or more relative to the total mass of the titanium dioxide pigment and pigments other than the titanium dioxide pigment.

8. A pen-shaped applicator containing the water-based liquid cosmetic as described in claim 1 or 2.

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