Pen-type liquid eyeliner applicator

Abstract

To provide a pen-type liquid eyeliner applicator that does not cause a tight feeling and does not cause an unpleasant feeling as a cosmetic, can give good discharge of liquid cosmetics from a pen-type eyeliner applicator container that uses a brush tip or a pen core, is highly resistant to moisture such as tears and sweat, and does not smudge or run even when wet with moisture.SOLUTION: In preparing liquid cosmetics using rubber latex, we investigated various changes in the type of rubber latex and other component compositions. As a result, we used a composition obtained by adding cis-polyisoprene latex or natural rubber latex to a liquid in which a pigment was dispersed in water using a polymer dispersant or surfactant, and mixing it, and used the resulting composition as the liquid cosmetic.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a colorant dispersion for use as an eyeliner, a liquid cosmetic composition using the same, and a pen-type liquid eyeliner applicator using the composition. In particular, the present invention relates to a pen-type liquid eyeliner applicator that uses an application member such as a brush tip or a pen core as the applicator. [Background technology]

[0002] 2. Description of the Related Art Conventionally, in liquid cosmetic compositions of the type that use an applicator, dyes, pigments, and the like as colorants have been dispersed in water with a surfactant or a water-soluble resin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2003-277232 [Patent Document 2] JP 2010-168323 A Summary of the Invention [Problem to be solved by the invention]

[0004] When conventional liquid cosmetic compositions are used as cosmetics for use around the eyes, such as in pen-type liquid eyeliner applicators, if the coloring agent, such as a dye or pigment, is left in the form of a dispersion in water dispersed with a surfactant or water-soluble resin, the composition has low durability against moisture such as tears and sweat, and tends to bleed or run when wet with moisture.

[0005] (JP 2003-277232 A) Japanese Patent Application Laid-Open Publication No. 2003-277232 describes a technology for skin paints as a technology related to preparations containing natural rubber latex, a type of latex rubber-like substance. That is, the skin paints described in the publication are made by blending rubber latex, which is applied to human skin to form a peelable rubber film on the skin surface, with a thickener that thickens the rubber latex to a degree that prevents dripping when applied to the skin, and a pigment for coloring the skin.

[0006] However, as described in JP 2003-277232 A, in a liquid cosmetic composition in which the viscosity is increased by blending a thickener in order to prevent dripping, good discharge from a pen-type application container using a brush tip or pen core cannot be obtained.

[0007] (JP 2010-168323 A) A pen-type liquid eyeliner composition containing natural rubber latex is described in JP 2010-168323 A. This invention describes a cosmetic with an eyelash straightening effect obtained by using natural rubber latex together with a synthetic resin emulsion, and states that by blending a component with a coloring effect, an eyeliner with an eyelash straightening effect can be obtained.

[0008] However, JP2010-168323A focuses on mixing natural rubber latex with a synthetic resin emulsion in a specific ratio, utilizing the shrinkage of the resulting film on the skin that causes a tightness feeling, which is uncomfortable for cosmetics. In addition, the publication does not describe the properties of the composition, the application method, the application container, or the application device for comfortably using the composition of the invention as an eyeliner, nor does it describe the combination of the composition with a pen-type application device that uses a brush tip or a pen core, which are preferred because of their comfortable use. Furthermore, when attempting to create a liquid cosmetic composition suitable for a pen-type applicator as an eyeliner using a brush tip or pen core, simply using the natural rubber latex described in JP 2010-168323 A does not result in sufficient ejection of the liquid cosmetic from the application container, and a pen-type liquid eyeliner applicator that is comfortable to use cannot be realized. [Means for solving the problem]

[0009] The present inventors have conducted extensive research to solve the above problems, and have investigated the use of rubber latex in the preparation of liquid eyeliner compositions using the rubber latex, with various changes in the type of rubber latex and other component compositions. As a result, they have found that a composition obtained by adding cis-polyisoprene latex or natural rubber latex to a liquid in which a pigment is dispersed in water using a polymeric dispersant or a surfactant, and mixing the resulting composition produces good results when discharged from a pen-type liquid eyeliner application container with a brush tip, leading to the invention.

[0010] In other words, by using a liquid cosmetic composition prepared using polyisoprene latex, a pen-type liquid eyeliner applicator that can be smoothly discharged from a pen-type liquid eyeliner application container that uses a brush tip or a pen core, and that can apply sufficient makeup with ease of use and a comfortable application feel has been realized.

[0011] The present invention relates to a pen-type liquid eyeliner applicator that combines a liquid composition containing rubber latex with an application container using a brush tip or a pen core. By using cis-polyisoprene latex or natural rubber latex as the rubber latex, it is possible to obtain a liquid cosmetic composition that can be sufficiently discharged from a pen-type liquid eyeliner application container using a brush tip or a pen core.

[0012] That is, the present invention provides the following inventions.

[0013] (1) A liquid cosmetic composition is a liquid eyeliner composition filled in an application container using a brush tip or a pen core, The liquid cosmetic composition contains cis-polyisoprene and a colorant, The cis-polyisoprene is blended in the liquid cosmetic composition in the form of a latex. To provide a pen-type liquid eyeliner applicator.

[0014] (2) The cis-polyisoprene is artificially synthesized by polymerization of isoprene. The present invention provides a pen-type liquid eyeliner applicator as described above in (1).

[0015] (3) The pen-type liquid eyeliner applicator according to (1) above, wherein the cis-polyisoprene is natural rubber, and the natural rubber is blended in the liquid cosmetic composition in the form of a latex.

[0016] (4) Provided is a pen-type liquid eyeliner applicator according to any one of (1) to (3) above, in which the cis-polyisoprene is contained in the liquid cosmetic composition in an amount of 1 to 30% by mass.

[0017] (5) The mass ratio of the cis-polyisoprene to the colorant in the liquid cosmetic composition is 1 / 10 to 30 / 1. The present invention provides a pen-type liquid eyeliner applicator according to any one of (1) to (3) above.

[0018] (6) The pen-type liquid eyeliner application container is provided with a pressure fluctuation buffer mechanism, the pressure fluctuation buffering mechanism has a buffer space connected to a tank that holds the liquid cosmetic composition, and buffers pressure fluctuations in the tank by allowing the liquid cosmetic composition and air to flow between the tank and the buffer space. The present invention provides a pen-type liquid eyeliner applicator according to any one of (1) to (3) above. Effect of the Invention

[0019] The pen-type liquid eyeliner applicator obtained by the present invention can be used by filling a pen-type liquid eyeliner container with a liquid cosmetic composition containing rubber latex, allowing the user to apply makeup comfortably and enjoy the excellent texture of a soft rubber film. Furthermore, the pen-type liquid eyeliner applicator obtained by the present invention exhibits a smooth writing feel, is not tight during the drying process, and the dried lines have a beautiful color. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The present inventors conceived of a pen-type liquid eyeliner applicator that combines a liquid composition that utilizes rubber latex with an application container that uses a brush tip or a pen core, and have realized a pen-type liquid eyeliner applicator that is capable of sufficient discharge from the pen-type liquid eyeliner application container that uses a brush tip or a pen core. To address this issue, a film-forming agent is added. As the film-forming agent, a resin emulsion or latex in which a polymeric compound is dispersed in water is used. Among these resin emulsions and latexes, latex, which is a rubber-like substance, is preferable in that it does not cause hardness or a tight feeling in the coating film. In addition, because of its comfort as a pen-type liquid eyeliner applicator, it can be loaded into a pen-type applicator container that uses a brush tip or a pen core, and good discharge can be achieved. That is, the liquid cosmetic composition according to the present invention is suitable for use in makeup by filling it into a container of an applicator for makeup cosmetics. An applicator using the liquid cosmetic composition of the present invention can smoothly apply cosmetics to application areas such as eyelids, and the coating film exhibits beautiful color development, provides sufficient cosmetic effects, and has excellent adhesion to the skin. The pen-type liquid eyeliner applicator of the present invention will be described in detail below. In this specification, the term "applicator" refers to a container filled with a liquid composition, whereas a container that is not filled with a liquid composition is called an "applicator container." This allows the two to be distinguished from one another. The same applies to the following explanations.

[0021] (Pen-type liquid eyeliner applicator) The pen-type liquid eyeliner applicator of the present invention comprises a liquid cosmetic composition in which a colorant is dispersed or dissolved in a medium mainly composed of water, and a pen-type liquid eyeliner application container using an application member. The liquid cosmetic of the present invention can be prepared by a conventional method, and can be filled into a pen-type liquid eyeliner application container using a brush tip or pen core as application means for use. The pen-type liquid eyeliner applicator of the present invention allows makeup to be applied comfortably, and allows the user to enjoy the good texture of the soft rubber film.

[0022] (Liquid composition) The viscosity of the liquid composition of the present invention, as measured with a Brookfield viscometer (rotor No. 12, 30 rpm), is preferably 30 mPa·s or less, more preferably 20 mPa·s or less, and particularly preferably 15 mPa·s or less. The pH of the liquid composition is preferably 5 to 9, and more preferably 5.5 to 8.5.

[0023] (Container for applying liquid eyeliner pen using brush tip or pen core) The pen-type liquid eyeliner application container using the brush tip or pen core used in the present invention is a pen-type liquid eyeliner application container that supplies a liquid cosmetic composition to the brush tip or pen core and applies it to the eyes or eyebrows. The pen-type liquid eyeliner application container using the brush tip or pen core used in the present invention may be one that can supply the liquid composition constituting the present invention to the brush tip or pen core, and the shape of the pen-type liquid eyeliner application container is not limited. For example, it is a container that can be used for eye shadow, eyeliner, mascara, lipstick, lip gloss, etc. Preferred examples include a pen-type liquid eyeliner application container that has a brush tip (brush pen) or pen core for eyeliner or eyebrow as application means, as well as an application member that serves as application means composed of rubber, elastomer, or closed cell having restorability, and has a container filled with the liquid cosmetic composition. Preferred examples include pen-type containers described in, for example, JP 2010-213869 A, JP 2008-513175 A, JP 2015-080856 A, JP 2015-100981 A, and JP 2021-112692 A. That is, these pen-type liquid eyeliner application containers are ones that use a relay core or a liquid cosmetic feeder to relay the liquid cosmetic composition from the tank to the tip of the brush or pen core by capillary action. The pen-type liquid eyeliner application container using the brush tip or pen core used in the present invention is preferably a pen-type liquid eyeliner application container that uses a liquid cosmetic feeder and distributes the cosmetic composition by capillary action. More preferably, a pen-type liquid eyeliner application container is used in which an extremely fine flow path is formed in the liquid cosmetic feeder or intermediate core, and the liquid cosmetic composition flows through the flow path by capillary force.

[0024] (Pressure fluctuation damping mechanism)

[0025] The pen-type liquid eyeliner application container according to an embodiment of the present invention is, for example, a rod-shaped pen-type liquid eyeliner application container that guides a liquid cosmetic composition from the rear end side to the front end side in the longitudinal direction and ejects it from the front end side. In the embodiment of the present invention, a hole is formed on the front end side, but the hole does not necessarily have to be formed. In addition, in an embodiment of the present invention, preferably, an application member that ejects the liquid cosmetic composition, a liquid cosmetic feeder that is rod-shaped extending in the longitudinal direction and inserted into the hole from the rear end side, and a liquid cosmetic tank that contains the liquid cosmetic composition are formed.

[0026] The pressure fluctuation buffer member is tubular and extends in the longitudinal direction, and is disposed on the outer periphery of the liquid cosmetic feeder. In this embodiment, the liquid cosmetic feeder employs a plastic intermediate core in which a flow path for the liquid cosmetic is formed, but an intermediate core body formed by bundling fibers may also be used.

[0027] The pressure fluctuation buffering member forms a buffer space therein that is connected to the liquid cosmetic tank, and forms a pressure fluctuation buffering mechanism that buffers pressure fluctuations in the liquid cosmetic tank by allowing the liquid cosmetic composition and air to circulate between the liquid cosmetic tank and the buffer space. In this embodiment, the liquid cosmetic feeder may be inserted into the pressure fluctuation buffer member with a loose fit or may be pressed into the pressure fluctuation buffer member. In addition, a gap is formed at the boundary between the inner peripheral surface of the pressure fluctuation buffering member and the outer peripheral surface of the liquid cosmetic feeder, and a liquid cosmetic distribution space is formed that communicates with the hole and the liquid cosmetic tank and can guide the liquid cosmetic composition in the liquid cosmetic tank to the hole. This liquid cosmetic distribution space also forms a pressure fluctuation buffering mechanism that buffers pressure fluctuations in the liquid cosmetic tank.

[0028] In the pen-type liquid eyeliner application container, the liquid cosmetic feeder is disposed in the liquid cosmetic tank at its rear end and has a contact area that contacts the liquid cosmetic composition.

[0029] (Coloring agent) The colorants to be blended in the liquid composition of the present invention include organic synthetic dyes, inorganic pigments, and natural dyes. Organic synthetic dyes are broadly classified into three types: dyes, lakes, and organic pigments. Inorganic pigments include titanium oxide and zinc oxide. Natural dyes include carotenoids and anthocyanins. Specifically, for example, red plant pigments, blue plant pigments, Blue No. 1, Red No. 227, Yellow No. 4, Yellow No. 5, carbon black, iron oxide (black, red, yellow), konjou, ultramarine, titanium oxide, carmine, cochineal, mica, kaolin, astaxanthin, cacao pigments, carotene, gardenia pigments, chlorophyll, zinc oxide, aluminum oxide, zirconium oxide, chromium oxide, chromium hydroxide, manganese violet, silica, talc, mica, fish scale foil, water-soluble dyes, oil-soluble dyes, etc. can be used. These colorants can be used alone or in combination. The blending ratio of the colorants is preferably 0.3 to 30 mass% in total if they are water-insoluble, more preferably 0.5 to 25 mass%, and particularly preferably 1 to 20 mass%, and if they are water-soluble, is preferably 0.01 to 2 mass%, and more preferably 0.03 to 1 mass% in total.

[0030] (Surfactants, solubilizers, dispersants) The liquid composition of the present invention may contain a surfactant, solubilizer, or dispersant for solubilizing or dispersing colorants, etc. Such surfactants, solubilizers, or dispersants are not particularly limited, but examples thereof include sulfonates such as sodium dioctyl sulfosuccinate and sodium olefin (C14-16) sulfonate, sulfates such as sodium lauryl sulfate and sodium laureth sulfate, polyethers such as polyoxyethyleneoxypropylene and polyethylene glycol stearate, polyglycerides such as polyglyceryl isostearate, polymers such as acrylates copolymers and polyvinylpyrrolidone, and polysaccharides such as carboxymethylcellulose, xanthan gum, and pullulan.

[0031] (latex) In this specification, the term "latex state" means a state in which a polymer is stably dispersed in water. In this specification, "cis-polyisoprene" includes synthetic cis-polyisoprene and natural rubber, both of which refer to the polymer itself. Both the dispersoid (cis-polyisoprene) and the dispersion medium (water) are collectively referred to as cis-polyisoprene latex.

[0032] (cis-polyisoprene, rubber) In contrast, the rubber component refers to the dispersoid portion. As the rubber component used in the present invention, cis-polyisoprene is preferable from the viewpoint of flexibility. The cis-polyisoprene may be obtained by artificially polymerizing isoprene, or may be natural rubber. The method artificially used for polymerizing isoprene is not particularly limited, and may be ionic polymerization or radical polymerization. Isoprene may be derived from petroleum or may be naturally derived from fermentation products or the like. Furthermore, the mass ratio of cis-polyisoprene to colorant in the liquid cosmetic composition is preferably 1 / 10 to 30 / 1. The proportion of cis-polyisoprene blended in the liquid composition in the present invention is preferably 1 to 30 mass %, more preferably 2 to 20 mass %, and particularly preferably 3 to 15 mass %, calculated as rubber content.

[0033] (natural rubber latex) The natural rubber latex blended in the liquid composition of the present invention can be any natural rubber latex available on the market. There are several types of natural rubber latex, including (1) a high ammonia type containing about 0.7% by mass of ammonia, (2) a low ammonia type containing less ammonia than the high ammonia type, and (3) a protein reduction type which has been treated to reduce the protein content. When ammonia reduction or neutralization is performed, a surfactant may be added to maintain emulsion stability as an emulsion, and a preservative may be added to ensure antiseptic properties. Centrifugation and aluminum chloride treatment are known methods for reducing protein. The natural rubber latex used in the present invention may be one that has been subjected to any of these treatments or additions.

[0034] (Wetting agent) The liquid composition of the present invention may contain, as a wetting agent, 1,3-propanediol, propylene glycol, 1,3-butanediol, 2,3-butanediol, 1,2-pentanediol, 1,2-hexanediol, caprylyl glycol, 1,2-decanediol, and the like, but is not particularly limited thereto.

[0035] (Preservatives) The liquid composition of the present invention may contain a compound having an antiseptic effect, without any particular limitation. Examples of such compounds include parabens such as methylparaben, phenoxyethanol, phenylpropanol, sodium dehydroacetate, chlorophenesin, hydroxyacetophenone, raspberry ketone, silver oxide, etc. In addition, plant extracts and fermentation products having antibacterial properties may be contained.

[0036] (Liquid oil, oily wax components, dispersion stabilizers, viscosity modifiers, stabilizers such as antioxidants, fragrances, medicinal ingredients) In addition to the above, the liquid composition of the present invention may contain, as necessary, liquid oils, clouding agents, oily wax components, dispersion stabilizers, viscosity modifiers, stabilizers such as antioxidants, fragrances, medicinal ingredients, opacifying agents, and the like, within the scope that does not impair the effects of the present invention.

[0037] (Mixer) The liquid cosmetic composition of the present invention can be produced by a conventional device, and the production method is not particularly limited. When preparing the liquid composition, for example, a propeller mixer, an anchor mixer, a homomixer, a paddle mixer, a disper mixer, an Ajihomomixer, etc. can be used. EXAMPLES

[0038] The present invention will be described in more detail below with reference to examples, although the technical scope of the present invention is not limited to these examples in any way.

[0039] The blending ratios of the components used in the following examples are summarized in Tables 1 and 2.

[0040] In Tables 1 and 2, the natural rubber latex used was (1) a high ammonia type containing about 0.7% by mass of ammonia, (2) a low ammonia type with an even lower amount of ammonia, (3) a protein-reduced treated type (centrifugal separation) which had been treated to reduce the protein content inherently, and (4) a protein-reduced treated type (aluminum chloride treatment). Furthermore, liquid cosmetic compositions were prepared by mixing and dispersing the components in the ratios shown in Tables 1 and 2. The resulting compositions were filled into a pen-type liquid eyeliner applicator container equipped with a brush tip and left to stand for 14 hours to prepare pen-type liquid eyeliner applicators. The resulting liquid eyeliner pen was used to draw four 10 cm long lines on the back of a person's hand for evaluation. The results showed that all lines were smooth to write with, did not feel tight as they dried, and the dried lines had a beautiful color that did not run or smudge even when water was poured on them. [Table 1]

[0041] [Table 2] [Industrial Applicability]

[0042] The pen-type liquid eyeliner applicator of the present invention relates to an applicator for makeup cosmetics as a pen-type liquid eyeliner applicator that uses a brush tip or a pen core.

Claims

1. A pen-type liquid eyeliner applicator in which a liquid cosmetic composition is filled in an application container using a brush tip or a pen core, The liquid cosmetic composition contains cis-polyisoprene and a colorant, The cis-polyisoprene is blended in the liquid cosmetic composition in the form of a latex. A pen-type liquid eyeliner applicator.

2. The cis-polyisoprene is artificially synthesized by polymerization of isoprene.

2. The pen-type liquid eyeliner applicator according to claim 1.

3. the cis-polyisoprene is natural rubber; The natural rubber is blended in a latex state in the liquid cosmetic composition.

2. The pen-type liquid eyeliner applicator according to claim 1.

4. The pen-type liquid eyeliner applicator according to any one of claims 1 to 3, wherein the cis-polyisoprene is contained in the liquid cosmetic composition in an amount of 1 to 30% by mass.

5. The mass ratio of the cis-polyisoprene to the colorant in the liquid cosmetic composition is 1 / 10 to 30 / 1.

4. The pen-type liquid eyeliner applicator according to claim 1.

6. The pen-type liquid eyeliner applicator is provided with a pressure fluctuation buffer mechanism, the pressure fluctuation buffering mechanism has a buffer space connected to a tank that holds the liquid cosmetic composition, and buffers pressure fluctuations in the tank by allowing the liquid cosmetic composition and air to flow between the tank and the buffer space. The pen-type liquid eyeliner applicator according to any one of claims 1 to 3.

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