Oily cosmetics with finishing layer

Abstract

The object of the present invention is to provide a novel transparent oily cosmetic, which can be decorated with various designs using cosmetic ingredients when decorating the transparent oily cosmetic, and can be decorated simply using printing technology, etc. The present invention relates to an oily solid cosmetic, characterized in that it has (A) a transparent oily base and (B) at least one decorative layer, the (A) transparent oily base contains (a1) a thickening component and (a2) a liquid oil component, the (B) decorative layer contains (b1) a powder component, and the (b1) powder component contains at least one powder having a refractive index higher than the refractive index of the (a2) liquid oil component.

Description

Technical Field

[0001] The present invention relates to a decorated oily cosmetic, and more particularly to a transparent oily cosmetic having an externally visible decorative layer formed as a transparent oily base capable of self-constituting cosmetics and having excellent aesthetics. Background Art

[0002] The industry has proposed various solutions for decorating the surface of solid powder cosmetics such as pressed powder to make the appearance beautiful. For example, Patent Document 1 discloses a decorative powder composition for drawing text or patterns on the surface of cosmetics using printing technology, and the powder surface-treated with a silane compound or a silazane compound can print fine and clear glossy patterns or text.

[0003] On the other hand, transparent oil-based cosmetics have been improving their usability such as good spreading and reduced stickiness while maintaining their transparency. For example, Patent Document 2 solves the usability problems such as slow spreading during application and decreased transparency over time by combining 12-hydroxystearic acid and dextrin fatty acid ester. However, attempts to decorate transparent cosmetics are limited. Although Patent Document 2 describes transparent lipsticks with pigments dispersed throughout the entire transparent cosmetic, no substantial decoration is performed.

[0004] As an example of decoration of transparent cosmetics, Patent Document 3 discloses a multi-color cosmetic in which a transparent cosmetic layer having a mortar-shaped concave portion is formed on the upper surface of a transparent container, and cosmetics colored in different colors are layered thereon, thereby forming a gradient pattern when viewed from the outside of the transparent container. Patent Document 4 discloses a stick-shaped oily solid cosmetic having a transparent outer layer portion provided around a colored inner layer portion. Furthermore, a transparent lipstick with an imitation flower or gold powder enclosed inside (trade name: KAILIJUMEI Flower Tint Lip) is also recently commercially available.

[0005] However, in the above-mentioned prior art, only ordinary designs can be used for decoration. In particular, the above-mentioned commercial products are decorations containing imitation products made of ingredients other than cosmetic ingredients, and their production is time-consuming.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: WO2017 / 073263

[0009] Patent Document 2: Japanese Patent No. 3657148

[0010] Patent Document 3: Japanese Patent No. 4926515

[0011] Patent Document 4: Japanese Patent Application Publication No. 2017-95452 Summary of the invention

[0012] Problem that the invention aims to solve

[0013] Therefore, an object of the present invention is to provide a novel transparent oil-based cosmetic which can be decorated with various designs using cosmetic ingredients when decorating the transparent oil-based cosmetic and can be decorated easily using printing technology or the like.

[0014] Solutions for solving problems

[0015] The present inventors have discovered that by including a powder having a higher refractive index than the liquid oil contained in the oily cosmetics in the powder component used for decorating the transparent oily cosmetics, the above-mentioned problems can be solved, and a decorative layer with a variety of designs can be easily formed, and the decorative layer can be clearly seen from the outside of the cosmetics and has excellent aesthetics, thereby completing the present invention.

[0016] That is, the present invention provides an oily solid cosmetic, characterized in that it comprises (A) a transparent oily base and (B) at least one decorative layer.

[0017] The above-mentioned (A) transparent oily base contains (a1) a thickening component and (a2) a liquid oil component.

[0018] The above-mentioned (B) decorative layer contains (b1) powder component,

[0019] The powder component (b1) includes at least one powder having a refractive index higher than that of the liquid oil component (a2).

[0020] Effects of the Invention

[0021] The oily solid cosmetic (hereinafter also referred to as "oily cosmetic") of the present invention has a refractive index of the powder contained in the decorative layer set higher than the refractive index of the liquid oil in the transparent oily base, so the decorative layer can be clearly seen when the cosmetic is observed from the outside, and the aesthetics are excellent. In addition, the transparent oily base and the decorative layer can be composed of only cosmetic ingredients, and the entire cosmetic including the decorative layer can be used as it is. Furthermore, it can be easily manufactured using conventional equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 (A) is a plan view showing an example of the oil-based cosmetic of the present invention. Figure 1 (B) is a cross-sectional view along the line segment XX' of the above-mentioned top view.

[0023] Figure 2 This is a photograph showing the appearance of another example of the oil-based cosmetic of the present invention.

[0024] Figure 3 This is a photograph showing the appearance of Comparative Example 1. DETAILED DESCRIPTION

[0025] Hereinafter, the oil-based cosmetic of the present invention will be described in detail.

[0026] Figure 1 This is a schematic diagram showing an example of the oil-based cosmetic of the present invention. Figure 1 (A) is a top view, and (B) is a cross-sectional view.

[0027] Figure 1 The cosmetic shown is filled in a flat dish container 1 and has a transparent oily base 10 , a first decorative layer 11 , and a second decorative layer 12 .

[0028] The first decorative layer 11 includes a plurality of ( Figure 1 The plurality of layers are formed into heart-shaped layers, and the plurality of layers are arranged on the same surface (the bottom surface of the container).

[0029] The second decorative layer 12 includes a plurality of ( Figure 1 The plurality of layers are formed into star-shaped layers, and the plurality of layers are provided on the same surface (the surface that does not contact the bottom surface of the container and the surface of the cosmetic).

[0030] Figure 1 In the oil-based cosmetic of the example shown, the first decorative layer and the second decorative layer are formed in different colors.

[0031] Figure 1 The portion other than the first and second decorative layers in the oil-based cosmetic is composed of a transparent oil-based base 10.

[0032] It should be noted that Figure 1 The above is an example of the oil-based cosmetic of the present invention, and does not limit the scope of the present invention in any way. Various modifications can be made in the present invention.

[0033] For example, the number of decorative layers can be set to one or more on the same surface or on multiple different surfaces, and their shapes, colors, sizes and thicknesses can be the same or different. Figure 1 The first decorative layer in the embodiment of the present invention can be arranged on the bottom surface of the container, or on the surface of the transparent base, or as Figure 1 It is arranged inside the transparent oily base agent like the second decorative layer in the film.

[0034] The oily cosmetic of the present invention has a refractive index of the powder contained in the decorative layer set higher than the refractive index of the liquid oil in the transparent oily base, so the outer edge of the decorative layer can be clearly seen from the outside of the cosmetic, and the aesthetics are excellent. Figure 1 When the decorative layer is provided inside the transparent oily base as in the example, or when it is provided on the surface of the transparent oily base, part of the light irradiated from above the cosmetics is absorbed by the decorative layer, so that the decorative layer is projected onto the bottom surface of the container, and its shadow can also be seen from the outside of the cosmetics. Therefore, it becomes a cosmetic that demonstrates beauty not only through the shape or color of the decorative layer itself, but also through the beauty of light or shadow.

[0035] (A) Transparent oily base

[0036] The transparent oily base constituting the oily cosmetic of the present invention comprises (a1) a thickening component and (a2) a liquid oil component.

[0037] The thickening component (or gelling component) (a1) is not particularly limited as long as it is a cosmetic component that has the function of thickening the liquid oil by dissolving in the liquid oil or swelling with the liquid oil. For example, dextrin fatty acid esters, sucrose fatty acid esters, glycerol fatty acid esters, amino acid gelling agents, fatty acids such as 12-hydroxystearic acid or their salts, and organic modified clay minerals can be mentioned. In the present invention, dextrin fatty acid esters can be preferably used, and dextrin palmitate can be particularly preferably used.

[0038] The dextrin fatty acid ester is preferably represented by the following formula (1).

[0039] A-(-O-CO-R) n (1)

[0040] In the formula (1), A is a residue obtained by removing n hydroxyl groups from dextrin, R is a linear or branched alkyl group having 3 to 30 carbon atoms, and n is an integer of 1 or more.

[0041] Specific examples of R in the above formula (1) include straight-chain alkyl groups such as propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, and octadecyl; and branched-chain alkyl groups such as 2-ethylhexyl, 2-hexyldecyl, 2-decyltetradecyl, isostearyl, and 2,7-dimethylhexadecyl.

[0042] The molecular weight of the dextrin fatty acid ester used in the present invention is not particularly limited, but is preferably 1,000 to 300,000, and more preferably 1,000 to 100,000.

[0043] Specific compound names included in the dextrin fatty acid ester represented by the general formula (1) include dextrin caprylate, dextrin caprate, dextrin laurate, dextrin myristate, dextrin stearate, dextrin behenate, dextrin coconut oil fatty acid ester, dextrin palmitate, dextrin 2-ethylhexanoate, and dextrin myristic acid / palmitate.

[0044] Sucrose fatty acid esters are preferably those in which the fatty acid is linear or branched, saturated or unsaturated, and has 12 to 22 carbon atoms. Specific examples include sucrose caprylate, sucrose caprate, sucrose laurate, sucrose myristate, sucrose palmitate, sucrose stearate, sucrose oleate, and sucrose erucate.

[0045] Glyceryl fatty acid ester is an esterification reaction product obtained by reacting glycerol, a dibasic acid having 18 to 28 carbon atoms, and a fatty acid having 8 to 28 carbon atoms (except the dibasic acid), and any ester generally used in cosmetics can be used without particular limitation. Specifically, glyceryl (behenic acid / isostearic acid / eicosanedioic acid) ester, glyceryl (behenic acid / eicosanedioic acid) ester, polyglyceryl-10 (behenic acid / eicosanedioic acid) ester, etc. can be mentioned.

[0046] Examples of the amino acid-based gelling agent include dibutyl lauroyl glutamide, dibutyl ethylhexanoyl glutamide, polyamide-8, and polyamide-3.

[0047] Examples of fatty acids (solid at room temperature) include myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, etc. Examples of fatty acid salts include calcium salts, magnesium salts, and aluminum salts thereof.

[0048] Representative examples of organic modified clay minerals include dimethyl distearyl ammonium hectorite, dimethyl alkyl ammonium hectorite, benzyl dimethyl stearyl ammonium hectorite, magnesium aluminum silicate treated with distearyl dimethyl ammonium chloride, etc. Commercially available products include BENTONE 27 (hectorite treated with benzyl dimethyl stearyl ammonium chloride: manufactured by Elementis Japan) and BENTONE 38 (hectorite treated with distearyl dimethyl ammonium chloride: manufactured by Elementis Japan).

[0049] The amount of the thickening component (a1) in the cosmetic of the present invention is usually 0.1 to 30% by mass, preferably 1 to 25% by mass, and more preferably 5 to 20% by mass relative to the total amount of the transparent oily base. If the amount is less than 0.1% by mass, the hardness of the transparent oily base becomes extremely low, making it difficult to support the decorative layer, and if it exceeds 30% by mass, it becomes difficult to uniformly fill the container.

[0050] (a2) Liquid oil

[0051] The liquid oil used in the present invention is not particularly limited as long as it can be thickened (gelled) by the above-mentioned thickening component to form a transparent oily base, and can be selected from oils that are liquid at room temperature (25° C.) and are usually formulated in cosmetics. As a representative example, a liquid oil selected from hydrocarbon oils, ester oils, silicone oils, and liquid fats can be preferably used. Specific examples are shown below, but are not limited to these.

[0052] Examples of the hydrocarbon oil include liquid paraffin, hydrogenated polydecene, squalane, pristane, paraffin, squalene, triisooctanoin, α-olefin oligomers, isododecane, isohexadecane, and light isomerized paraffin.

[0053] Examples of the ester oil include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, acetylated lanolin, isocetyl stearate, isocetyl isostearate, cholesterol 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid esters, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearate malate, di-2-heptylundecanoic acid glyceryl, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate , tri-2-ethylhexanoin, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, trimyristin, tri-2-heptylundecanoic acid glyceryl, castor oil fatty acid methyl ester, oleic acid oil, acetic acid glyceryl, 2-heptylundecanoic acid, diisobutyl adipate, 2-octyldodecyl N-lauroyl-L-glutamate, di-2-heptylundecanoic acid, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristic acid, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, isodecyl neopentanoate, 2-ethylhexyl succinate, ethyl acetate, butyl acetate, triethyl citrate, tri(caprylic / capric)glyceryl, etc.

[0054] Examples of the silicone oil include chain polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and diphenylsiloxyphenyltrimethylsiloxane; and cyclic polysiloxanes such as decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, and hexamethylcyclotrisiloxane.

[0055] Examples of the liquid oil include avocado oil, camellia oil, turtle oil, macadamia oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, peach kernel oil, wheat germ oil, camellia kissi seed oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, ginkgo oil, rice bran oil, paulownia oil, tung oil, jojoba oil, germ oil, triglycerol, tricaprylin, triisopalmitin, and the like.

[0056] (a2) The liquid oil component may be used alone or in combination of two or more. It is preferred that the liquid oil components be formulated so that the weighted average value of the refractive index of each formulated liquid oil component (this value is defined as the "refractive index of the liquid oil component" in the present invention) is within the range of 1.4 to 1.6, and more preferably so that the refractive index of the liquid oil component is 1.42 to 1.52.

[0057] It should be noted that, as the refractive index of the oil in the present invention, for example, a value obtained by taking 2 g of the oil and placing it on a glass plate, mixing it with a spatula until it becomes a uniform slurry, and measuring the resultant at 20°C using a precision Abbe refractometer (type: 3T manufactured by ATAGO Corporation).

[0058] The amount of the liquid oil (a2) is not particularly limited, but is usually in the range of 20 to 99.5% by mass, preferably 50 to 90% by mass, based on the total amount of the transparent oil base, and is appropriately determined depending on the form and hardness of the intended cosmetic.

[0059] In the transparent oily base of the present invention, in addition to the thickening component (a1) and the liquid oil component (a2), other arbitrary components may be added within the range that does not hinder the effect of the present invention. The other arbitrary components are not limited, and examples thereof include: solid or semisolid oil components, moisturizers, aqueous components, preservatives, antioxidants, ultraviolet absorbers, polymers, surfactants, pigments, dyes, pigments, defoamers (such as dimethyl silicone oil), various drugs (such as vitamin E), lower alcohols (with a carbon number of less than 6), solvents, fragrances, etc.

[0060] The solid or semi-solid oil component is not particularly limited as long as it can be incorporated into cosmetics, and examples thereof include solid fats and oils, waxes, hydrocarbon oils, and higher alcohols.

[0061] Examples of the solid fats and oils include cocoa butter, coconut oil, horse oil, hydrogenated coconut oil, palm oil, beef tallow, sheep tallow, hydrogenated beef tallow, palm kernel oil, lard, beef bone fat, wood wax kernel oil, hydrogenated oil, beef saddle fat, wood wax, and hydrogenated castor oil.

[0062] Examples of the wax include beeswax, candelilla wax, cotton wax, carnauba wax, bay wax, insect wax, spermaceti wax, montan wax, rice bran wax, lanolin, kapok wax, lanolin oil, sugarcane wax, isopropyl lanolinate, hydrogenated lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesteryl ether, polyethylene glycol lanolin acid ester, and POE hydrogenated lanolin alcohol ether.

[0063] Examples of the hydrocarbon oil (solid or semisolid) include ozokerite, ceresin, vaseline, and microcrystalline wax.

[0064] Examples of the higher alcohol include straight-chain alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, and cetearyl alcohol; and branched-chain alcohols such as monostearyl glyceryl ether (batyl alcohol), 2-decyltetradecynyl alcohol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, and octyldodecanol.

[0065] Examples of the moisturizer include polyhydric alcohols and sugar alcohols. Specific examples include glycols such as dipropylene glycol and 1,3-butylene glycol; glycerin; mannitol; and sorbitol.

[0066] Here, the term "transparent" in the present invention includes the range of "transparent" to "semi-transparent" in the sense generally used in the field of cosmetics as long as the decorative layer can be seen from the outside of the cosmetics. For example, the following can also be defined as the "transparent oily base" in the present invention: the oily base is filled in a sample cell with an optical path length of 10 mm and cooled and solidified, and the resultant is left at 25° C. for 1 hour, and the transmittance of light at 900 nm measured by a spectrophotometer is at least 50%.

[0067] The transparent oily base (A) in the present invention may be in a form consisting of only oily components, or in an emulsified form such as a water-in-oil type or an oil-in-water-in-oil type containing an aqueous component, as long as it satisfies the above-mentioned requirement of "transparency". In addition, it may be colorless or colored within a range that ensures transparency. These oily bases can be manufactured using a method common to cosmetics of various forms.

[0068] The (A) transparent oily base of the present invention is preferably a solid. The so-called "solid" in the present invention refers to a composition that has no fluidity at room temperature (25°C) and normal pressure. In addition, a composition having a hardness of 50 to 300 measured at 25°C using a rheometer (3mmφ, 1.0mm needle penetration, 2K range, 2cm / min) can also be defined as a "solid" in the present invention. If the above hardness is less than 50, it becomes more difficult to support a decorative layer. If it exceeds 300, it becomes impossible to spread evenly when filling in a container, and it is more difficult to form a decorative layer on its surface.

[0069] (B) Decorative layer

[0070] The decorative layer (B) in the oil-based cosmetic of the present invention contains a powder component (b1). The powder component (b1) contains at least one powder having a higher refractive index than the refractive index of the liquid oil component (a2).

[0071] The powder component (b1) is a component necessary for achieving the decorative effect of the decorative layer, and is preferably a powder selected from inorganic pigments such as white pigments, coloring pigments, and pearlescent agents, and organic powders that can be added to cosmetics.

[0072] Specific examples of powders that can be blended include, but are not limited to, talc, kaolin, mica, sericite, muscovite, biotite, phlogopite, synthetic mica, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, metal tungstate, magnesium, silicon dioxide, zeolite, cerium oxide, zirconium oxide, tin oxide, aluminum oxide, magnesium oxide, barium sulfate, barium titanate, calcined calcium sulfate, calcined gypsum, calcium phosphate, fluoroapatite, hydroxyapatite, ceramic powder, inorganic powder of metal soap (zinc myristate, calcium palmitate, aluminum stearate, etc.); polyamide resin powder (nylon powder, etc.), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, PMMA (Polymethyl Organic powders such as polymethyl methacrylate) powder, styrene-acrylic copolymer resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, etc.; inorganic white pigments such as titanium oxide and zinc oxide; inorganic red pigments such as iron oxide (red iron) and iron titanate; inorganic brown pigments such as γ-iron oxide; inorganic yellow pigments such as iron oxide yellow and loess; inorganic black pigments such as iron oxide black, carbon, and low-valent titanium oxide; inorganic purple pigments such as mango purple and cobalt purple; inorganic green pigments such as chromium oxide, chromium hydroxide, and cobalt titanate; inorganic blue pigments such as ultramarine and Prussian blue; mica covered with titanium oxide, Pearlescent agents such as bismuth oxychloride covering titanium oxide, talc covering titanium oxide, mica covering colored titanium oxide, bismuth oxychloride, fish scale foil, etc.; metal powder pigments such as aluminum powder and copper powder; organic pigments such as Red No. 202, Red No. 205, Red No. 220, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, Blue No. 404; organic pigments such as zirconium, barium, aluminum lakes such as Red No. 3, Red No. 104, Red No. 227, Red No. 401, Orange No. 205, Yellow No. 4, Yellow No. 202, Green No. 3, Blue No. 1, etc.; natural pigments such as chlorophyll and β-carotene.

[0073] The powder may be used alone or in combination of two or more. The (b1) powder component contains at least one powder having a refractive index higher than that of the (a2) liquid oil contained in the (A) transparent oily base (hereinafter also referred to as "high refractive index powder").

[0074] The high refractive index powder is selected to have a refractive index higher than that of the liquid oil (a2), preferably 0.01 or more, more preferably 0.05 or more, further preferably 0.1 or more, and most preferably 0.5 or more.

[0075] The high refractive index powder is not particularly limited, but is preferably selected from powders having a refractive index of 1.45 or more. Specific examples of powders having a refractive index of 1.45 or more include titanium oxide (rutile type, anatase type), barium titanate, cerium oxide, zirconium oxide, bismuth oxychloride, zinc oxide, tin oxide, aluminum oxide, magnesium oxide, barium sulfate, polystyrene, kaolin, mica, talc, nylon, PMMA, and silica.

[0076] The (b1) powder component only needs to contain at least one type of high refractive index powder. It is preferred that the ratio of the high refractive index powder in the (b1) powder component be set to 50% by mass or more, 70% by mass or more, or 80% by mass or more. The (b1) powder component may also be composed only of high refractive index powder.

[0077] In the present invention, it is preferred that the decorative layer is formed by preparing a dispersion in which the powder component (b1) is dispersed in a medium (b2) capable of dispersing the powder component (hereinafter also referred to as an "ink composition") and spraying the ink composition.

[0078] The (b2) dispersion medium in the ink composition is not particularly limited as long as it has fluidity that allows the (b1) powder component to be dispersed. In consideration of the drying speed when forming the decorative layer, a medium with a relatively low boiling point, such as a lower alcohol with a carbon number of 3 or less, such as ethanol, is preferably used. In addition, in consideration of the formation of a decorative layer on the surface of the above-mentioned (A) transparent oily base, in order to prevent the bleeding of the (B) decorative layer, it is preferred to select a medium with low compatibility with the oil component formulated in the (A) transparent oily base.

[0079] The ink composition preferably contains a binder component for bonding the powders together in the decorative layer in addition to the (b1) powder component and the (b2) dispersion medium. In addition, it may contain a humectant such as glycerin, a thickener such as dimethylacrylamide / sodium acryloyldimethyltaurate crosslinked polymer, etc.

[0080] The oily cosmetic of the present invention is manufactured by a step of forming a decorative layer on the bottom surface of a container or on the surface of a transparent oily base filled in the container. When forming the decorative layer, it is convenient and preferred to use the above-mentioned ink composition to apply the ink composition in a desired shape or pattern by coating, spraying, or printing.

[0081] In order to form a decorative layer using an ink composition, for example, the following methods can be used: a method using a stencil technique, wherein the stencil technique uses a template paper cut out with the intended shape / pattern, applies the ink composition from the template paper, and removes the template paper; a method using the same template paper and spraying (spraying) the ink composition; a method using screen printing technology; a method using an inkjet printer and drawing with the ink composition, etc.

[0082] Considering that the ink composition is used to form a decorative layer as described above and is applied via a nozzle of a spray or inkjet printer, the viscosity of the ink composition is preferably suppressed to 10000 mPa·s or less, preferably 8000 mPa·s or less, from the viewpoint of preventing nozzle clogging.

[0083] The amount of the powder component (b1) in the ink composition is not particularly limited, but is preferably 5 to 20% by mass, more preferably 7 to 15% by mass, relative to the total amount of the ink composition. Furthermore, from the viewpoint of preventing nozzle clogging, the average particle size of the powder contained in (b1) is preferably 200 μm or less, more preferably 100 μm or less.

[0084] The present invention provides a method for preparing the above-mentioned oily cosmetic of the present invention. The method comprises:

[0085] (1) forming a decorative layer (B) by drawing using an ink composition in which the powder component (b1) is dispersed in a dispersion medium (b2); and

[0086] (2) A step of filling the above-mentioned (A) transparent oily base into a container.

[0087] Below, refer to Figure 1 , a method for producing the oil-based cosmetic of the present invention using a technique of using a template when forming a decorative layer is described.

[0088] First, a template paper (a template paper with three heart-shaped cutouts) is placed on the bottom of a flat dish container 1, and the ink composition (first ink composition) for forming the first decorative layer 11 is brushed on, thereby forming the first decorative layer 11. After appropriate drying, the transparent oil base 10 is filled to the height of the bottom of the second decorative layer 12. Next, the ink composition (second ink composition) for forming the second decorative layer 12 is brushed on using a template technique using a template paper with two star-shaped cutouts, thereby forming the second decorative layer 12. After appropriate drying, the transparent oil base 10 is filled from thereon until the container is filled.

[0089] As described above, a transparent oil-based cosmetic having a plurality of decorative layers can be produced. The thickness of the decorative layer is not particularly limited, but is generally about 0.01 to 1 mm.

[0090] It should be noted that Figure 1 In the embodiment, the first ink composition and the second ink composition contain powder components of different colors.

[0091] In addition, the manufacturing method using the above-mentioned stencil technology can be changed to an automated manufacturing method using a screen printing device, an inkjet printing device, or the like.

[0092] Figure 2 The photograph shows another example of the oil-based cosmetic of the present invention produced by the above method. The cosmetic of this example has a butterfly-shaped decorative layer three-dimensionally arranged in three colors.

[0093] Although Figure 2 Although not clearly shown in the photograph, the oily cosmetic has a special appearance of being transparent as a whole and having a layered (film-like) decorative layer of various colors inside, and has a visual effect such as forming a shadow under the decorative layer when light is irradiated from the surface of the cosmetic, making the decorative layer appear to emerge three-dimensionally.

[0094] The oily cosmetic of the present invention is suitable for providing as a makeup cosmetic that effectively utilizes the unique appearance (aesthetics) as described above, and is preferably provided as a lipstick, a base, an eye base (eye shadow base), etc., although not particularly limited.

[0095] Example

[0096] The present invention will be described in more detail below with reference to Examples, but the present invention is not limited to the Examples. It should be noted that the blending amount is expressed in mass % unless otherwise specified.

[0097] A transparent oil-based cosmetic having a decorative layer was produced using a transparent oil-based base having a composition shown in Table 1 below and an ink composition for forming a decorative layer having a composition described in Table 2.

[0098] [Table 1]

[0099]

[0100] [Table 2]

[0101]

[0102] In the transparent oil-based cosmetics (Examples 1 and 2, respectively) having a decorative layer formed using the ink compositions of Examples A and B described in Table 2, even if the powder components included were not subjected to surface hydrophobicization treatment, the bright red decorative layer was clearly visible from the outside of the cosmetics.

[0103] However, when the ink composition of Example C in Table 2 was used to draw on the bottom surface of the container to form a decorative layer, and the transparent oil base in Table 1 was filled thereon (Comparative Example 1), the decorative layer contained only powder (silicon dioxide) having a refractive index lower than that of the liquid oil, so the outline of the decorative layer was blurred and could not be clearly seen, and the aesthetics was poor (see Comparative Example 1). Figure 3 ).

Claims

1. An oily solid cosmetic, characterized in that: It has (A) a transparent oily base and (B) at least one decorative layer. The (A) transparent oily base contains 5 to 20% by weight of (a1) a thickening component and 50 to 90% by weight of (a2) a liquid oil component relative to the total amount of the transparent oily base. The (B) decorative layer contains (b1) a powder component, The thickening component (a1) is a dextrin fatty acid ester, The (a2) liquid oil is at least one selected from the group consisting of hydrocarbon oil, ester oil, silicone oil, and liquid grease. The (b1) powder component includes a powder having a refractive index higher than 2.3, and the amount of the powder having a refractive index higher than 2.3 in the amount of the (b1) powder component is 50% by mass or more. The (B) decorative layer is disposed in a layered manner on the bottom surface and / or inside of the (A) transparent oily base.

2. The oily solid cosmetic according to claim 1, wherein: The (a2) liquid oil component includes oil having a refractive index of 1.42 to 1.

52.

3. A method for producing the oily solid cosmetic according to claim 1, comprising: A step of forming (B) a decorative layer by drawing using an ink composition in which the (b1) powder component is dispersed in a (b2) dispersion medium; and The step of filling the (A) transparent oily base into a container, The ink composition contains 5 to 20% by mass of the powder component (b1) based on the total amount of the composition.

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