Oil-based solid cosmetic

Abstract

The present invention provides an oil-based solid cosmetic that allows users to feel a new tactile sensation of elasticity upon contact with the solid cosmetic, and that enables users to apply an appropriate amount of the oil-based cosmetic to their fingers or applicator. [Solution] The oil-based solid cosmetic composition comprises a wax having a melting point of 60°C to 120°C, a liquid oil containing an ester oil, a triblock copolymer comprising two or more blocks, wherein the monomer constituting each block is at least one selected from the group of monomers consisting of isoprene, butadiene, and styrene, and a powder. The blending ratio of the wax is 2.0% by mass to 10.0% by mass, the blending ratio of the liquid oil is 20% by mass to 80% by mass, the blending ratio of the triblock copolymer is 0.5% by mass to 10.0% by mass, and the blending ratio of the powder is 1% by mass to 60% by mass.

Description

Technical Field

[0001] The present disclosure relates to an oily solid cosmetic.

Background Art

[0002] An example of an oily solid cosmetic contains powder such as a pigment, an oily component, and a wax. Oily solid cosmetics containing wax can prevent scattering of powder and liquid, and thus are used in various cosmetics such as foundations, blushes, and lipsticks that require portability and usability. An example of an oily lipstick cosmetic that is an oily solid cosmetic contains, in addition to powder, an oily component, and a wax, a (styrene-isoprene) diblock copolymer having a number average molecular weight of 100,000 or more and 3,000,000 or less (see, for example, Patent Document 1).

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] There is a demand for oily solid cosmetics that allow a user to perceive a new tactile sensation when touching the cosmetic, and at the same time, allow an appropriate amount of the oily solid cosmetic to be picked up by the user's finger or an applicator when the cosmetic is applied to the skin.

Means for Solving the Problem

[0005] The oil-based solid cosmetic composition for solving the above problems comprises a wax having a melting point of 60°C to 120°C, a liquid oil containing an ester oil, a triblock copolymer comprising two or more blocks, wherein the monomer constituting each block is at least one selected from the group of monomers consisting of isoprene, butadiene, and styrene, and a powder. The blending ratio of the wax is 2.0% by mass to 10.0% by mass. The blending ratio of the liquid oil is 20% by mass to 80% by mass. The blending ratio of the triblock copolymer is 0.5% by mass to 10.0% by mass. The blending ratio of the powder is 1% by mass to 60% by mass.

[0006] According to the above configuration, by adding a triblock copolymer to an oily solid cosmetic composition containing wax, ester oil, and hydrocarbon oil, it is possible to impart a new tactile quality, namely elasticity, to the oily solid cosmetic composition.

[0007] In order for a cosmetic product to solidify, it is necessary to incorporate a certain amount or more of wax into the cosmetic product. Furthermore, the triblock copolymer suppresses excessive solidification of the wax-containing cosmetic product. On the other hand, if the amount of wax incorporated exceeds the certain amount, the properties of the wax become dominant in the cosmetic product, which impairs the elasticity provided by the triblock copolymer and makes it difficult for the cosmetic product to adhere to the skin when touched with fingers or applicators.

[0008] For a composition containing wax and liquid oil to function as a cosmetic, it is necessary to incorporate a certain amount or more of liquid oil into the cosmetic. On the other hand, if the amount of liquid oil exceeds the predetermined amount, the elasticity of the cosmetic will be lost, and the cosmetic will not adhere well when touched with fingers or applicators.

[0009] In this regard, according to the above configuration, since the oil-based solid cosmetic composition contains 2.0% to 10.0% by mass of wax, 20% to 80% by mass of liquid oil, and 0.5% to 10.0% by mass of triblock copolymer, both elasticity and adhesion to fingers and applicators are achieved in the oil-based solid cosmetic composition.

[0010] In the above-described oily solid cosmetic composition, the liquid oil may contain a hydrocarbon oil, and the blending ratio of the hydrocarbon oil may be 90% by mass or less relative to the total amount of the liquid oil. According to the above configuration, compared to the case where the liquid oil contains only ester oil, the elasticity of the oil-based solid cosmetic is increased, and the oil-based solid cosmetic can be made to adhere more easily to fingers or applicators.

[0011] In the above-mentioned oil-based solid cosmetic composition, the blending ratio of the liquid oil may be 70% by mass or less. According to the above configuration, by having a liquid oil content of 70% by mass or less, the oil-based solid cosmetic can be made to adhere more easily to fingers and applicators, and the elasticity of the oil-based solid cosmetic can be increased.

[0012] In the above-described oil-based solid cosmetic composition, the sum of the blending ratio of the wax and the blending ratio of the triblock copolymer is 2.5% by mass or more and 20% by mass or less, the value obtained by dividing the blending ratio of the triblock copolymer by the blending ratio of the wax is 0.12 or more and 3.4 or less, and the blending ratio of the liquid oil may be 50% by mass or less. [Effects of the Invention]

[0013] According to the oil-based solid cosmetic composition of this disclosure, a user who comes into contact with the oil-based solid cosmetic composition can feel elasticity, which is a new tactile sensation, and the user can apply an appropriate amount of the oil-based cosmetic composition to their fingers or applicator. [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 is a table showing the evaluation results for the oil-based solid cosmetic compositions of Examples 1 to 5. [Figure 2] Fig. 2 is a table showing the evaluation results of the oily solid cosmetics of Examples 6 to 10. [Figure 3] Fig. 3 is a table showing the evaluation results of the oily solid cosmetics of Examples 11 to 15. [Figure 4] Fig. 4 is a table showing the evaluation results of the oily solid cosmetics of Examples 16 to 20. [Figure 5] Fig. 5 is a table showing the evaluation results of the oily solid cosmetics of Comparative Examples 1 to 5. MODE FOR CARRYING OUT THE INVENTION

[0015] One embodiment of an oily solid cosmetic will be described with reference to FIGS. 1 to 5. Hereinafter, each component of the oily solid cosmetic will be described first, followed by examples, evaluation methods, and evaluation results of the oily solid cosmetic; however, the present invention is not limited thereto.

[0016] [Oily Solid Cosmetic] The oily solid cosmetic comprises a wax having a melting point of 60°C or higher and 120°C or lower, a liquid oil comprising an ester oil, a triblock copolymer containing two or more blocks, and a powder. In the triblock copolymer, the monomer constituting each block is at least one selected from the monomer group consisting of isoprene, butadiene, and styrene. Further, in the oily solid cosmetic, when the total amount of the oily solid cosmetic is 100% by mass, each component satisfies the following conditions.

[0017] (Condition 1-1) The blending ratio of the wax is 2.0% by mass or more and 10.0% by mass or less. (Condition 1-2) The blending ratio of the liquid oil is 20% by mass or more and 80% by mass or less. (Condition 1-3) The blending ratio of the triblock copolymer is 0.5% by mass or more and 10.0% by mass or less. (Condition 1-4) The blending ratio of the powder is 1% by mass or more and 60% by mass or less.

[0018] In the oily solid cosmetic of the present disclosure, adding a triblock copolymer to an oily solid cosmetic formulated with a wax and a liquid oil including an ester oil makes it possible to impart elasticity, which is a novel tactile property, to the oily solid cosmetic.

[0019] In order to solidify a cosmetic, it is necessary to incorporate a predetermined amount or more of a wax into the cosmetic. Furthermore, the triblock copolymer suppresses excessive solidification of the wax-containing cosmetic. On the other hand, when the blending amount of the wax exceeds a predetermined amount, the properties inherent to the wax become dominant in the cosmetic, which impairs the elasticity provided by the triblock copolymer and also makes the cosmetic less likely to adhere even when the cosmetic is touched with a finger or an applicator.

[0020] For allowing a composition containing a wax and a liquid oil to function as a cosmetic, it is necessary to incorporate a predetermined amount or more of the liquid oil into the cosmetic. On the other hand, when the blending amount of the liquid oil exceeds a predetermined amount, elasticity can no longer be perceived in the cosmetic, and the cosmetic becomes less likely to adhere even when the cosmetic is touched with a finger or an applicator.

[0021] In this regard, according to the oily solid cosmetic of the present disclosure, since each component contained in the oily solid cosmetic satisfies conditions (1-1) to (1-4), both elasticity and satisfactory adhesion to fingers or applicators are achieved in the oily solid cosmetic. Herein, high adhesion of the oily solid cosmetic to fingers or applicators means that when a user of the oily solid cosmetic touches the oily solid cosmetic with a finger or an applicator to apply the oily solid cosmetic to the skin, an amount of the oily cosmetic suitable for application to the skin can be picked up on the finger or applicator.

[0022] The oil-based solid cosmetic of this embodiment is less prone to creasing when applied to the skin and less prone to secondary adhesion. Furthermore, the oil-based solid cosmetic has good stability. The phrase "less prone to creasing" means that after a predetermined amount of time has passed since applying the oil-based solid cosmetic to the skin, wrinkles on the skin are less noticeable. Secondary adhesion refers to the transfer of color from the oil-based solid cosmetic applied to the skin to clothing or tableware that comes into contact with the skin, resulting in color transfer to the clothing or tableware. The phrase "good stability of the oil-based solid cosmetic" means that there is little change in state when the oil-based solid cosmetic is stored under specific conditions.

[0023] The sum of the wax and triblock copolymer blending ratios may be 2.5% by mass or more and 20% by mass or less, preferably 4% by mass or more and 18% by mass or less, and more preferably 4.5% by mass or more and 9% by mass or less. Furthermore, the value obtained by dividing the triblock copolymer blending ratio by the wax blending ratio may be 0.12 or more and 3.4 or less, and preferably 0.3 or more and 1.4 or less.

[0024] Furthermore, an example of the combination of the wax blending ratio, the triblock copolymer blending ratio, the value obtained by dividing the triblock copolymer blending ratio by the wax blending ratio, and the hydrocarbon oil blending ratio in the liquid oil may be, for example, the combinations described below. That is, the oily solid cosmetic composition may satisfy all of the following conditions (2-1) to (2-3).

[0025] Condition (2-1) The sum of the wax blending ratio and the triblock copolymer blending ratio is 5% by mass or more and 8% by mass or less. Condition (2-2) The value obtained by dividing the ratio of triblock copolymer by the ratio of wax is 0.25 or more and 0.60 or less. Condition (2-3) The blending ratio of liquid oil is 50% by mass or less.

[0026] If all conditions (2-1) through (2-3) are met, the elasticity of the cosmetic or its adherence to fingers or applicators can be further improved. For example, an oil-based cosmetic may satisfy all of the following conditions (3-1) to (3-3).

[0027] Condition (3-1) The sum of the wax blending ratio and the triblock copolymer blending ratio is 6% by mass or more and 8% by mass or less. Condition (3-2) The value obtained by dividing the ratio of triblock copolymer by the ratio of wax is 0.50 or more and 0.60 or less. Condition (3-3) The blending ratio of hydrocarbon oil in the liquid oil is 60% by mass or less.

[0028] If all conditions (3-1) through (3-3) are met, the elasticity of the oil-based solid cosmetic can be further increased, and the oil-based solid cosmetic can be made to adhere more easily to fingers or applicators.

[0029] The following describes the individual components of the oil-based solid cosmetic. [wax] The melting point of wax is between 60°C and 120°C. Wax is an organic substance that is solid under standard conditions and becomes liquid upon heating. Standard conditions are defined as a temperature of 25°C and a pressure of 10°C. 5 The value is Pa. As mentioned above, the wax ratio satisfies condition (1-1). By keeping the wax ratio below the upper limit, the oily solid cosmetic does not become too hard, which prevents the oily cosmetic from becoming difficult to remove with fingers or applicators, and also prevents the elasticity of the oily solid cosmetic from being impaired. By keeping the wax ratio above the lower limit, the stability of the oily solid cosmetic is enhanced. Furthermore, by keeping the wax ratio above the lower limit, excessive adhesion of the oily cosmetic to fingers or applicators and secondary adhesion of the oily solid cosmetic applied to the skin are suppressed. Moreover, by keeping the wax ratio above the lower limit, the decrease in the elasticity of the oily solid cosmetic is suppressed.

[0030] The lower limit of the wax blending ratio may be 2.5% by mass or 3.0% by mass. The upper limit of the wax blending ratio may be 7.0% by mass or 5.0% by mass. The combination of the lower and upper limits of the wax blending ratio may be any combination of the lower limit and upper limit selected from the above values. The range of the wax blending ratio may be, for example, 2.5% by mass or more and 7.0% by mass or less, or 3.0% by mass or more and 5.0% by mass or less.

[0031] The wax may be any wax commonly used in cosmetics, and examples of waxes include microcrystalline wax, paraffin, ceresin, candelilla wax, sunflower seed wax, carnauba wax, rice wax, montan wax, rice bran wax, beeswax, privet wax, lanolin wax, hydrogenated jojoba seed oil, hydrogenated castor oil, palmitic acid, stearic acid, arachidic acid, behenic acid, behenyl alcohol, silicone wax, polyethylene, (ethylene / propylene) copolymer, and Fischer-Tropsch wax.

[0032] [Liquid oil] Liquid oil is an oily substance that is liquid under standard conditions. As described above, the mixing ratio of liquid oil satisfies conditions (1-2). By keeping the mixing ratio of liquid oil below the upper limit, a decrease in the elasticity of the oily solid cosmetic and a decrease in its adhesion to fingers and applicators are suppressed. Furthermore, by keeping the mixing ratio of liquid oil below the upper limit, a decrease in the stability of the oily solid cosmetic, creasing of the cosmetic applied to the skin, and secondary adhesion of the oily solid cosmetic applied to the skin are suppressed. Furthermore, by keeping the mixing ratio of liquid oil above the lower limit, a decrease in adhesion to fingers and applicators is suppressed.

[0033] The lower limit of the liquid oil blending ratio may be 30% by mass or 40% by mass. The upper limit of the liquid oil blending ratio may be 60% by mass or 50% by mass. The combination of the lower and upper limits of the liquid oil blending ratio may be any combination of the lower limit and upper limit selected from the above values. The range of the liquid oil blending ratio may be, for example, 30% by mass or more and 60% by mass or less, or 40% by mass or more and 50% by mass or less.

[0034] Liquid oils include ester oils. Examples of ester oils include isostearyl isostearate, isopropyl isostearate, ethyl isostearate, octyldodecyl oleate, isopropyl myristate, octyldodecyl myristate, polyglyceryl-10 myristate, (caprylic / capric acid) coconut alkyl, hexyl laurate, decyl oleate, isopropyl lanolinate, tri(caprylic / capric acid)glyceryl, isopropyl linoleate, isotridecyl isononanoate, triethylhexanoin, polyglyceryl-10 decaisostearate, polyglyceryl-2 triisostearate, 2-ethylhexyl paramethoxycinnamate, diisostearyl malate, propylene glycol dicaprylate, propylene glycol diisostearate, and neopentyl glycol diethylhexanoate.

[0035] The liquid oil may contain at least one of synthetic oils, vegetable oils, and animal oils in addition to ester oils. That is, the liquid oil may contain only one of synthetic oils, vegetable oils, and animal oils in addition to ester oils, or it may contain two or more of any selection. Furthermore, the liquid oil may contain two or more liquid oils that are included in one of the synthetic oils, vegetable oils, and animal oils. The liquid oil may also be a volatile oil. In addition, the liquid oil may be an ultraviolet absorber.

[0036] Examples of liquid oils include oleic acid, eicosenoic acid, linoleic acid, linolenic acid, liquid paraffin, 1-dodecanol, octyldodecanol, isostearyl alcohol, oleyl alcohol, diisononyl adipate, liquid lanolin, soybean oil, sesame oil, olive oil, corn oil, castor oil, camellia oil, sasanqua oil, argania spinosa kernel oil, macadamia nut oil, coconut oil, avocado oil, apricot kernel oil, dimethicone, phenyl trimethicone, diphenyl dimethicone, cyclotetrasiloxane, cyclopentasiloxane, cyclohexasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Examples of UV absorbers may include benzophenone-based, PABA-based, cinnamic acid-based, and salicylic acid-based agents. Examples of UV absorbers include, for example, 4-tert-butyl-4'-methoxydibenzoylmethane, oxybenzone, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, diethylaminohydroxybenzoylhexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine.

[0037] Liquid oil may contain hydrocarbon oil. Liquid oil containing hydrocarbon oil enhances the elasticity and adhesion of oil-based solid cosmetics. When liquid oil contains hydrocarbon oil, the proportion of hydrocarbon oil may be 90% by mass or less of the total amount of liquid oil. By keeping the proportion of hydrocarbon oil below the upper limit, the elasticity of the oil-based solid cosmetic is prevented from becoming excessively high, thereby preventing the oil-based solid cosmetic from becoming difficult to adhere to fingers or applicators. By keeping the proportion of hydrocarbon oil above the lower limit, the oil-based solid cosmetic retains its elasticity and can adhere to fingers or applicators.

[0038] The lower limit of the hydrocarbon oil blending ratio may be 5% by mass or 10% by mass relative to the total amount of liquid oil. The upper limit of the hydrocarbon oil blending ratio may be 70% by mass or 60% by mass. The combination of the lower and upper limits of the hydrocarbon oil blending ratio may be any combination of the lower limit and upper limit selected from the above values. The range of the hydrocarbon oil blending ratio may be, for example, 5% by mass or more and 70% by mass or less, or 10% by mass or more and 60% by mass or less.

[0039] Examples of hydrocarbon oils include alkanes and squalanes. A hydrocarbon oil may contain two or more hydrocarbon oils with different numbers of carbon atoms, or it may consist of only a single hydrocarbon oil.

[0040] [Triblock copolymer] As described above, the mixing ratio of the triblock copolymer satisfies conditions (1-3). By keeping the mixing ratio of the triblock copolymer below the upper limit, it is prevented that the oil-based solid cosmetic becomes too hard, thereby impairing its elasticity, and that it does not adhere well to fingers or applicators. By keeping the mixing ratio of the triblock copolymer above the lower limit, it is prevented that the oil-based solid cosmetic becomes too soft, thereby impairing its elasticity.

[0041] The lower limit of the triblock copolymer's blending ratio may be 1.0% by mass or 1.5% by mass. The upper limit of the triblock copolymer's blending ratio may be 5.0% by mass or 4.0% by mass. The combination of the lower and upper limits of the triblock copolymer's blending ratio may be any combination of the lower limit and upper limit selected from the values ​​described above. The range of the triblock copolymer's blending ratio may be, for example, 1.0% by mass or more and 5.0% by mass or less, or 1.5% by mass or more and 4.0% by mass or less.

[0042] A triblock copolymer has three blocks. Each block is composed of at least one monomer selected from the group of monomers consisting of isoprene, butadiene, and styrene. That is, each block may be composed of one of isoprene, butadiene, and styrene, or two or more of any selection. A triblock copolymer may also be of the ABA type. That is, a triblock copolymer may contain block A and block B which is different from block A, and may have a structure in which block B is sandwiched between two blocks A in the direction of polymer elongation. Alternatively, a triblock copolymer may also be of the ABC type. That is, a triblock copolymer may contain block A, block B which is different from block A, and block C which is different from block A and block B, and may have a structure in which block A, block B, and block C are arranged in order in the direction of polymer elongation.

[0043] When the triblock copolymer has an ABA type, for example, block A may be a hard segment and block B may be a soft segment. The glass transition temperature of the hard segment is higher than that of the soft segment. Block A and block B may be incompatible with each other. Furthermore, block A may have cohesive force, while block B may be compatible with liquid oils with low polarity. This increases the compatibility of the triblock copolymer with ester oils. When an ABA-type triblock copolymer is dispersed in a liquid oil, the block A of each polymer aggregates with each other, thereby forming a three-dimensional network structure among the multiple polymers.

[0044] One example of the ABA-type triblock copolymers mentioned above is the hydrogenated (styrene / butadiene) copolymer. The hydrogenated (styrene / butadiene) copolymer contains a styrene block composed of styrene monomer as block A. The hydrogenated (styrene / butadiene) copolymer also contains a butadiene block composed of butadiene monomer as block B, which is saturated by hydrogenation. In block B, the carbon-carbon double bonds in butadiene are saturated by hydrogenation, and as a result, block B has a structure in which ethylene and butylene are mixed.

[0045] The triblock copolymer may, for example, be a polystyrene-polyisoprene-polystyrene triblock copolymer.

[0046] [powder] Powders are added to oil-based solid cosmetics to impart color development, gloss, conceal skin irregularities, protect the skin from ultraviolet rays, and improve usability when the oil-based solid cosmetic is applied to the skin. As described above, the powder blending ratio satisfies conditions (1-4). By keeping the powder blending ratio below the upper limit, a decrease in the elasticity of the oil-based solid cosmetic and difficulty in the oil-based solid cosmetic adhering to fingers and applicators are suppressed. By keeping the powder blending ratio above the lower limit, secondary adhesion of the oil-based solid cosmetic applied to the skin is suppressed, and creasing of the oil-based solid cosmetic applied to the skin is suppressed.

[0047] The lower limit of the powder blending ratio may be 5% by mass or 10% by mass. The upper limit of the powder blending ratio may be 55% by mass or 50% by mass. The combination of the lower and upper limits of the powder blending ratio may be any combination of the lower limit and upper limit selected from the above values. The range of the powder blending ratio may be, for example, 5.0% by mass or more and 55.0% by mass or less, or 10.0% by mass or more and 50.0% by mass or less.

[0048] The powder may be an ultraviolet scattering agent, a pearlescent agent, a texture improver, an extender pigment, a spherical powder, an organic dye, etc. The powder may contain only one of the ultraviolet scattering agent, pearlescent agent, texture improver, extender pigment, a spherical powder, or an organic dye, or it may contain two or more of any selection.

[0049] Examples of UV scattering agents include titanium dioxide and zinc oxide, which have an average particle size of 1 nm to 100 nm. Examples of pearlescent agents include titanium mica, titanium dioxide or iron oxide-coated borosilicate (Ca / Al), titanium dioxide or iron oxide-coated alumina, and (PET / polymethyl methacrylate) laminate.

[0050] Examples of extender pigments include titanium dioxide, zinc oxide, iron red oxide, iron yellow oxide, iron black oxide, mica, titanium mica, fluorophlogopite, sericite, talc, kaolin, calcium carbonate, red iron oxide, and ultramarine. The surface of the extender pigments may be surface-modified with silicone or the like. Examples of spherical powders include silica, (HDI / trimethylol hexyllactone) crosspolymer, dimethicone crosspolymer, (vinyl dimethicone / lauryl dimethicone) crosspolymer, cellulose, and nylon powder. Examples of organic dyes include Red 104, Red 201, Red 202, Yellow 4, Orange 204, Blue 404, Blue 1, and Green 3.

[0051] [Other ingredients] Oil-based solid cosmetics may contain ingredients other than waxes, liquid oils, triblock copolymers, and powders, to the extent that they do not impair the effects of the oil-based solid cosmetics.

[0052] Oil-based solid cosmetics may contain, for example, dispersants, humectants, anti-irritation agents, astringents, pH adjusters, antioxidants, preservatives, excipients, anti-wrinkle agents, fragrances, etc. These components may be synthetic or natural. Examples of dispersants include polyhydroxystearic acid and sorbitan sesquiisostearate.

[0053] [Application] Oil-based solid cosmetics are used, for example, on the human body. Examples of uses for oil-based solid cosmetics include lipstick, lip balm, foundation, concealer, blush, eyeshadow, eyebrow pencil, serum stick, skin balm, hair balm, deodorant stick, and solid perfume.

[0054] [Examples] Examples and comparative examples of oil-based solid cosmetic compositions will be described with reference to Figures 1 to 5. The following materials were used in the examples and comparative examples.

[0055] [wax] • Synthetic wax, melting point 83°C (manufactured by DKSH, Cire Wax 80) (Cire Wax is a registered trademark)

[0056] [Block copolymer] • Hydrogenated (styrene / butadiene) copolymer (KRATON, Ellamera TER-SET 603) (Ellamera is a registered trademark) • Hydrogenated (styrene / isoprene) copolymer (KRATON, Ellamera BI-THIN 402) Furthermore, hydrogenated (styrene / butadiene) copolymers have a styrene-ethylenebutylene-styrene triblock structure when hydrogenated into styrene-butadiene-styrene triblock copolymers. Similarly, hydrogenated (styrene / isoprene) copolymers have a styrene-ethylenepropylene diblock structure when hydrogenated into styrene-isoprene diblock copolymers.

[0057] [Liquid oil] • (C15-19) Alkane (manufactured by SEPPIC, EMOGREEN L19) • Isotridecyl isononanoate (manufactured by Croda Japan, Ultimopure Cromodal TN-LQ-(JP)) • Dimethicone (manufactured by Shin-Etsu Chemical Co., Ltd., KF-96A-6CS) Octyldodecanol (manufactured by Higher Alcohol Industry Co., Ltd., Risonol 20SP / MB) (C15-19) alkanes are a mixture of alkanes with 15 to 19 carbon atoms.

[0058] [powder] • Silicone-treated titanium oxide (manufactured by Miyoshi Chemical Co., Ltd., SA-Titanium MP-1133) • Silicone-treated iron oxide red (manufactured by Miyoshi Chemical Co., Ltd., SA-RHPS-10) • Silicone-treated yellow iron oxide (manufactured by Miyoshi Chemical Co., Ltd., SA-YHP-10) • Silicone-treated iron oxide black (manufactured by Miyoshi Chemical Co., Ltd., SA-BHP-10) • Silicone-treated synthetic fluorophlogopite (manufactured by Miyoshi Chemical Co., Ltd., SA-Synthetic Mica PDM-1000) • Silica 1 (manufactured by JGC Catalysts & Chemicals Co., Ltd., SATINIER M5) • Silica 2 (manufactured by Miyoshi Chemical Co., Ltd., SB-700)

[0059] [Dispersant] • Polyhydroxystearic acid (manufactured by Nisshin Oillio Group, Ltd., Saracos HS-6C) Polyhydroxystearic acid has a paste-like consistency under standard conditions.

[0060] [Examples 1 to 20, and Comparative Examples 1 to 5] To prepare the oil-based solid cosmetic compositions for each example and comparative example, first, a mixture was obtained by mixing the components shown in Figures 1 to 5 in the proportions shown in Figures 1 to 5. Next, the mixture was dissolved by heating it to 100°C. Then, the dissolved mixture was stirred. After stirring, the mixture was filled into a container and cooled to obtain the oil-based solid cosmetic compositions for each example and comparative example.

[0061] [Evaluation Method] For each example and comparative example of an oil-based solid cosmetic composition, five items—adhesion, elasticity, resistance to creasing, secondary adhesion, and stability—were evaluated using the method described below. Five expert panelists were selected to evaluate adhesion, elasticity, resistance to creasing, and secondary adhesion. Each example and comparative example of an oil-based solid cosmetic composition was then evaluated by the five expert panelists on a 5-point scale based on the following evaluation criteria. The average of the five evaluation results was calculated, and the average was rounded to two decimal places. Furthermore, based on the average score, a 4-level evaluation was performed according to the performance evaluation criteria for oil-based solid cosmetic compositions described below.

[0062] ◎: Average score is 4.0 or higher. ○: The average score is between 3.0 and 4.0. △: Average score is between 2.0 and 3.0. ×: The average score is less than 2.0 points.

[0063] [Item 1: Adhesion] Under conditions of 25°C and 1 atm, each expert panelist evaluated the ease with which an oil-based solid cosmetic product, contained in a jar with a capacity of 5g, adhered to their finger, based on the following evaluation criteria.

[0064] 5 points: Very easy to stick. 4 points: It sticks easily. 3 points: It doesn't adhere well, but this is not a problem when used as a cosmetic. 2 points: It doesn't stick easily. 1 point: It is very difficult to adhere.

[0065] [Item 2: Elasticity] Under conditions of 25°C and 1 atm, each expert panelist evaluated the elasticity of an oil-based solid cosmetic product, taken from a 5g jar container, using their fingertips, based on the following evaluation criteria. The two evaluation criteria, "almost no elasticity" and "no elasticity," include both cases where the oil-based solid cosmetic product is too hard to feel elasticity and cases where it is too soft to feel elasticity.

[0066] 5 points: Very elastic. 4 points: It is elastic. 3 points: Slightly elastic. 2 points: It has almost no elasticity. 1 point: It lacks elasticity.

[0067] [Item 3: Resistance to wrinkling] In an environment of 25°C and 1 atm, five expert panelists applied an oil-based solid cosmetic to their faces. After 5 hours, they evaluated whether creasing or smudging occurred based on the following evaluation criteria. 5 points: No makeup creasing at all. 4 points: Makeup hardly smudges. 3 points: There is some slight creasing of the makeup. 2 points: Makeup is smudged. 1 point: There is a lot of makeup creasing.

[0068] [Item 4: Secondary adhesion] In an environment of 25°C and 1 atm, each expert panelist applied an oil-based solid cosmetic to their finger and spread it on their forearm. Subsequently, they pressed a tissue paper onto the applied area and evaluated whether or not the oil-based solid cosmetic color transferred to the tissue paper based on the following evaluation criteria.

[0069] 5 points: The color doesn't transfer. 4 points: The color hardly transfers. 3 points: The color transfers slightly. 2 points: The color transfers. 1 point: The color transfers badly.

[0070] [Item 5: Stability] For each example and comparative example, 5g of oil-based solid cosmetic was placed in a plastic jar container, sealed, and stored for 30 days at the temperatures described below. Three conditions were set for the storage temperature of the jar container. The stability of the oil-based solid cosmetic was evaluated based on the following evaluation criteria by checking the properties of the oil-based solid cosmetic when the jar container was opened after 30 days.

[0071] [Temperature conditions] 40℃ 50℃ • Cycle test: The temperature was maintained at -5°C for 8 hours, then at 20°C with 85% humidity for 4 hours, followed by 40°C with 85% humidity for 8 hours, and then again at 20°C with 85% humidity for 4 hours. This cycle was repeated approximately 30 times.

[0072] [Evaluation Criteria] ○: No sweating on the surface of the oil-based solid cosmetic. △: Tiny, sesame-seed-sized spots of perspiration have appeared on the surface of the oil-based solid cosmetic. ×: The entire surface of the oil-based solid cosmetic is visibly sweaty, or the cosmetic is clearly dissolved.

[0073] The following criteria were established for the overall evaluation of the test results using three different temperature conditions. [comprehensive evaluation] ◎: A "○" rating was obtained for all three temperature conditions. ○: There is one "△" rating under the three temperature conditions, but no "×" ratings. △: There are two or three "△" ratings under three temperature conditions, but no "×" ratings. ×: There is one or more "×" ratings in the three temperature conditions.

[0074] [Evaluation Results] The evaluation results for Examples 1 to 20 and Comparative Examples 1 to 5 are shown in Figures 1 to 5. Note that since the cosmetic composition of Comparative Example 3 did not solidify, its adhesion, elasticity, resistance to wrinkling, secondary adhesion, and stability were not evaluated.

[0075] As shown in Figures 1 to 4, in Examples 1 to 20, we were able to achieve cosmetic products with good adhesion, elasticity, resistance to creasing, secondary adhesion, and stability.

[0076] [Example prescription] The following are specific examples of formulations for oil-based solid cosmetics. [Formulation Example 1] Makeup base • Synthetic wax (melting point 83℃) 10.0% by mass • Hydrogenated (styrene / butadiene) copolymer 2.0% by mass • (C15-19) Alkanes 36.0% by mass Isotridecyl isononanoate 37.9% by mass • Sorbitan sesquiisostearate 2.0% by mass • Tocopherol 0.1% by mass • Silicone-treated titanium oxide 3.0% by mass • Silicone-treated red iron oxide 0.1% by mass • Silicone-treated iron oxide yellow 0.8% by mass • Silicone-treated iron oxide black 0.05% by mass • Silicone-treated synthetic fluorophlogopite 1.05% by mass • Silica 7.0% by mass

[0077] [Example prescription 2] Lip balm • Synthetic wax (melting point 83℃) 10.0% by mass • Hydrogenated (styrene / butadiene) copolymer 7.0% by mass • (C15-19) Alkane 40.0% by mass Isotridecyl isononanoate 39.9% by mass • Polyhydroxystearic acid 0.1% by mass • Silica 3.0% by mass

[0078] [Formulation Example 3] Foundation (Natural Formula) • Sunflower seed wax (melting point 79°C) 4.0% by mass Carnauba wax (melting point 78°C) 1.0% by mass • Hydrogenated (styrene / butadiene) copolymer 2.0% by mass • (C15-19) Alkanes 27.8% by mass • Caprylic / Capric Triglyceride 10.0% by mass Isotridecyl isononanoate 10.0% by mass • Polyhydroxystearic acid 0.2% by mass Titanium dioxide 22.5% by mass ·Iron oxide red 0.4% by mass ·Iron oxide yellow 1.2% by mass ·Iron oxide black 0.2% by mass • Synthetic fluorophlogopite 3.7% by mass • Silica 17.0% by mass

[0079] [Formulation Example 4] Foundation • Synthetic wax (melting point 100℃) 1.0% by mass Candelilla wax (melting point 72°C) 4.0% by mass • Hydrogenated (styrene / butadiene) copolymer 2.0% by mass • (C15-19) Alkanes 23.8% by mass • Caprylic / Capric Triglyceride 10.0% by mass Isotridecyl isononanoate 10.0% by mass • Polyhydroxystearic acid 0.2% by mass Titanium dioxide 22.5% by mass ·Iron oxide red 0.4% by mass ·Iron oxide yellow 1.2% by mass ·Iron oxide black 0.2% by mass • Synthetic fluorophlogopite 2.7% by mass • Silica 22.0% by mass

[0080] [Prescription Example 5] Concealer Carnauba wax (melting point 78°C) 2.0% by mass Candelilla wax (melting point 72°C) 4.0% by mass • Hydrogenated (styrene / butadiene) copolymer 2.0% by mass • (C15-19) Alkanes 23.8% by mass • Caprylic / Capric Triglyceride 10.0% by mass Isotridecyl isononanoate 10.0% by mass • Polyhydroxystearic acid 0.2% by mass Titanium dioxide 22.5% by mass ·Iron oxide red 0.4% by mass ·Iron oxide yellow 1.2% by mass ·Iron oxide black 0.2% by mass • Synthetic fluorophlogopite 3.7% by mass • Silica 20.0% by mass

[0081] [Formulation Example 6] Foundation • Synthetic wax (melting point 83℃) 6.0% by mass • Hydrogenated (styrene / butadiene) copolymer 3.0% by mass • (C15-19) Alkanes 24.9% by mass • Caprylic / Capric Triglyceride 35.0% by mass Isotridecyl isononanoate 10.0% by mass • Polyglyceryl-10 Decaisostearate 3.0% by mass • Tocopherol 0.1% by mass • Silicone-treated titanium oxide 8.0% by mass • Silicone-treated red iron oxide 0.2% by mass • Silicone-treated iron oxide yellow 0.8% by mass • Silicone-treated iron oxide black 0.1% by mass • Silicone-treated synthetic fluorophlogopite 3.9% by mass • Silica 5.0% by mass

[0082] [Formulation Example 7] Cheek Color • Synthetic wax (melting point 83℃) 6.0% by mass • Hydrogenated (styrene / butadiene) copolymer 3.0% by mass Squalane 25.0% by mass • Caprylic / Capric Triglyceride 35.0% by mass Isotridecyl isononanoate 10.0% by mass • Polyglyceryl-2 triisostearate 3.0% by mass Titanium dioxide 7.6% by mass ·Yellow No. 4 0.5% by mass ·Red No. 202 0.8% by mass ·Iron oxide black 0.1% by mass • Titanium mica 4.0% by mass • Cellulose 5.0% by mass

[0083] [Formulation Example 8] Sunscreen base cosmetic • Synthetic wax (melting point 83℃) 6.0% by mass • Hydrogenated (styrene / butadiene) copolymer 3.0% by mass • Isododecane 20.9% by mass Trimethylsiloxysilicate 5.0% by mass • Ethylhexyl palmitate 20.0% by mass Isotridecyl isononanoate 10.0% by mass • 2-ethylhexyl paramethoxycinnamate 5.0% by mass • Sorbitan sesquiisostearate 1.0% by mass • Tocopherol 0.1% by mass • Silicone-treated titanium oxide 8.0% by mass • Silicone-treated red iron oxide 0.2% by mass • Silicone-treated iron oxide yellow 0.8% by mass • Silicone-treated iron oxide black 0.1% by mass • Silicone-treated synthetic fluorophlogopite 3.9% by mass • Silicone-treated silica 15.0% by mass ·DPG 0.5% by mass ·Fragrance 0.5% by mass

[0084] As described above, according to one embodiment of the oil-based solid cosmetic composition, the following effects can be obtained. (1) By satisfying all of the conditions (1-1) to (1-4) of the oil-based solid cosmetic composition, it is possible to achieve both adhesion and elasticity in the oil-based solid cosmetic composition. (2) If the liquid oil contains saturated hydrocarbon oil and the proportion of saturated hydrocarbon oil is 90% by mass or less of the total amount of liquid oil, the elasticity of the oily solid cosmetic can be increased and the oily solid cosmetic can be made to adhere more easily to fingers or applicators.

[0085] (3) When the proportion of liquid oil is 70% by mass or less, the oil-based solid cosmetic can be made to adhere more easily to fingers or applicators, and the elasticity of the oil-based solid cosmetic can be increased.

[0086] (4) If the oil-based solid cosmetic composition satisfies all of conditions (2-1) to (2-3), its elasticity or adhesion can be further enhanced. (5) If the oil-based solid cosmetic composition satisfies all of conditions (3-1) to (3-3), its elasticity and adhesion can be further enhanced.

Claims

1. A wax having a melting point of 60°C or higher and 120°C or lower, Liquid oil containing ester oil, A triblock copolymer comprising two or more blocks, wherein each block is composed of at least one monomer selected from the group of monomers consisting of isoprene, butadiene, and styrene, Contains powder, The blending ratio of the wax is 2.0% by mass or more and 10.0% by mass or less. The blending ratio of the liquid oil is 20% by mass or more and 80% by mass or less. The blending ratio of the aforementioned triblock copolymer is 0.5% by mass or more and 10.0% by mass or less. The mixing ratio of the aforementioned powder is 1% by mass or more and 60% by mass or less. Oil-based solid cosmetic.

2. The liquid oil includes hydrocarbon oil, The blending ratio of the hydrocarbon oil is 90% by mass or less relative to the total amount of the liquid oil. The oil-based solid cosmetic composition according to claim 1.

3. The blending ratio of the liquid oil is 70% by mass or less. The oil-based solid cosmetic composition according to claim 2.

4. The sum of the blending ratio of the wax and the blending ratio of the triblock copolymer is 2.5% by mass or more and 20% by mass or less. The value obtained by dividing the blending ratio of the triblock copolymer by the blending ratio of the wax is 0.12 or more and 3.4 or less. The blending ratio of the liquid oil is 50% by mass or less. An oil-based solid cosmetic composition according to any one of claims 1 to 3.

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