Oily solid cosmetic

Abstract

To provide an oily solid cosmetic that has a matte texture while exhibiting superior moldability.SOLUTION: The present invention provides an oily solid cosmetic comprising: (a) a crosslinked organopolysiloxane; (b) at least one solid oil selected from the group consisting of hardened castor oil and trihydroxystearin; and (c) an oil-absorbing powder.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an oily solid cosmetic preparation. [Background technology]

[0002] Conventionally, various textures have been desired for the finish when cosmetics are applied to the skin, such as glossy or shiny textures, and matte textures with reduced gloss or shine. In particular, oil-based solid cosmetics such as lipstick tend to have a strong glossy texture due to the oily ingredients, making it difficult to achieve a matte texture.

[0003] Various attempts have been made to obtain a matte texture. Conventionally, a matte texture has been achieved by increasing the amount of powder or solidifying agent to more easily scatter the light reflection caused by oily agents. However, this has had problems such as poor spreadability when applied to the skin and an increased feeling of dryness after application. These problems significantly affect marketability, particularly on thin skin areas such as the eyelids and mucous membranes such as the lips, which have low moisturizing and barrier functions and are sensitive areas, so countermeasures are needed.

[0004] Oil-based solid cosmetics containing crosslinked organopolysiloxanes to achieve a matte texture are known (see, for example, Patent Documents 1 to 4). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2023-534487 [Patent Document 2] Special Publication No. 2023-534488 [Patent Document 3] Patent Publication No. 2021-88517 [Patent Document 4] Japanese Patent Application Laid-Open No. 2000-281532 Summary of the Invention [Problem to be solved by the invention]

[0006] However, if the amount of crosslinked organopolysiloxane is too large, a matte texture can be obtained, but moldability is poor, and particularly when molding with a mold, there is the problem of poor mold release.On the other hand, if the amount of crosslinked organopolysiloxane is too small, there is the problem that a sufficient matte texture cannot be obtained.

[0007] Therefore, an object of the present invention is to provide an oily solid cosmetic that has a matte texture and yet is also excellent in moldability. [Means for solving the problem]

[0008] As a result of extensive research to solve the above-mentioned problems, the present inventors have succeeded in obtaining an oil-based solid cosmetic preparation with a matte texture by using a solid oil of hydrogenated castor oil and / or trihydroxystearin, even when the blending amount of crosslinked organopolysiloxane is set to a relatively small amount to ensure moldability. Furthermore, surprisingly, the oil-based solid cosmetic preparation obtained in this manner was soft to the touch (smooth application feel) and yet had good stability over time.

[0009] Based on these successes and findings, the present inventors have succeeded in creating an oily solid cosmetic that solves the problems of the present invention and contains a crosslinked organopolysiloxane as well as a solid oil of hydrogenated castor oil and / or trihydroxystearin. The present invention was completed based on the successes and findings first achieved and discovered by the present inventors.

[0010] Therefore, as one aspect of the present invention, there are provided oily solid cosmetics according to the following embodiments. [1] (a) a crosslinked organopolysiloxane; (b) at least one solid oil selected from the group consisting of hydrogenated castor oil and trihydroxystearin; (c) an oil-based solid cosmetic comprising an oil-absorbing powder. [2] The oily solid cosmetic preparation according to [1], wherein the (a) crosslinked organopolysiloxane is at least one crosslinked organopolysiloxane selected from the group consisting of methylpolysiloxane crosspolymers and methylphenylpolysiloxane crosspolymers. [3] The oil-based solid cosmetic according to any one of [1] to [2], wherein the (c) oil-absorbing powder is at least one powder selected from the group consisting of (vinyl dimethicone / methicone silsesquioxane) crosspolymer, starch AL octenyl succinate, cellulose, and silica. [4] The oily solid cosmetic preparation according to any one of [1] to [3], further comprising (d) liquid oil. [5] The oily solid cosmetic according to [4], wherein the liquid oil (d) is at least one liquid oil selected from the group consisting of dimethicone, triethylhexanoin, and diphenylsiloxyphenyl trimethicone. [6] The oily solid cosmetic preparation according to any one of [1] to [5], wherein the content of the (a) crosslinked organopolysiloxane is 3.0% by mass or less. [7] The oily solid cosmetic preparation according to any one of [1] to [6], wherein the content of (b) at least one solid oil selected from the group consisting of hydrogenated castor oil and trihydroxystearin is 2.5% by mass or more. [8] The oily solid cosmetic preparation according to any one of [1] to [7], which has a needle penetration hardness of 49 (g) or more at 20°C. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide an oil-based solid cosmetic preparation that has a matte texture and excellent moldability. Furthermore, according to the present invention, it is possible to provide an oil-based solid cosmetic preparation that has a soft touch (a smooth application feel) and good stability over time. DETAILED DESCRIPTION OF THE INVENTION

[0012] The oily solid cosmetic preparation, which is one embodiment of the present invention, will be described in detail below, but the present invention can take various forms as long as it achieves its object.

[0013] Unless otherwise specified, each term in this specification is used in the sense commonly used by those skilled in the cosmetic field and should not be construed as having an unduly restrictive meaning. Furthermore, the theories and speculations made in this specification are based on the inventor's knowledge and experience to date, and therefore the technical scope of the present invention is not limited solely by such theories and speculations.

[0014] "Content" is synonymous with concentration and amount added (amount used), and unless otherwise specified, refers to the ratio of the amount of a component to the total amount of an oil-based solid cosmetic. However, the total amount of each component does not exceed 100%. In this specification, unless otherwise specified, the unit of content is "mass % (wt%)." When a commercially available product is used, the content of the component is preferably the amount of the component contained in the commercially available product, but it may also be the amount of the commercially available product itself. "And / or" means any one or any or all combinations of two or more of the associated listed items. "Comprising" means that elements other than those explicitly stated as being included can be added (same meaning as "comprising at least"), but also encompasses "consisting of" and "consisting essentially of." That is, "comprising" can mean including the explicitly stated elements and any one or more elements, consisting of the explicitly stated elements, or consisting essentially of the explicitly stated elements. Elements include limitations such as ingredients, steps, conditions, and parameters. The "to" in a numerical range means a range that includes both the preceding and following numerical values, and also includes a range excluding one of the included limit values. For example, "0% by mass to 100% by mass" may mean 0% by mass or more, 100% by mass or less, or 0% by mass or more and 100% by mass or less. The term "about" in relation to a numerical value means a range of ±10% of the stated numerical value. For example, about 5% by mass would be 4.5% to 5.5% by mass. The number of digits in an integer value matches the number of significant digits. For example, 1 has one significant digit, and 10 has two significant digits. Also, the number of digits after the decimal point matches the number of significant digits in a decimal value. For example, 0.1 has one significant digit, and 0.10 has two significant digits.

[0015] "Solid" refers to a substance that does not exhibit fluidity and can maintain its solid form at room temperature (20°C) and atmospheric pressure (760mmHg). "Liquid" refers to a substance that has fluidity at room temperature (20°C) and atmospheric pressure (760mmHg).

[0016] The "matte texture" is a texture in which the coating film on the skin has a reduced sheen and luster when the oil-based solid cosmetic is applied to the skin, and can be evaluated and confirmed by the method for evaluating the "matte texture" described in the examples below. "Softness to the touch (smooth application feel)" refers to the smooth feel that spreads with a light touch and with little resistance when applying an oily solid cosmetic to the skin, and can be evaluated and confirmed by the method for evaluating "softness to the touch" described in the Examples below. "Stability over time" refers to the condition in which, after molding an oily solid cosmetic product, it is loaded into a commercial outer container and stored in a thermostatic bath at 40°C, 45°C, and a high-temperature cycle (20°C to 40°C / 24 hours), and thereafter no sweating, melting, breaking, etc. is observed by visual observation for 30 days after storage, and can be evaluated and confirmed by the method for evaluating stability over time described in the Examples below.

[0017] An oily solid cosmetic preparation according to one embodiment of the present invention comprises (a) a crosslinked organopolysiloxane (hereinafter also referred to as "component (a)"), (b) at least one solid oil selected from the group consisting of hydrogenated castor oil and trihydroxystearin (hereinafter also referred to as "component (b)"), and (c) an oil-absorbing powder (hereinafter also referred to as "component (c)").

[0018] The oil-based solid cosmetic preparation of one embodiment of the present invention preferably has a needle penetration hardness at 20° C. of 49 g or more, more preferably 49 to 90 g, even more preferably 50 to 80 g, and especially preferably 55 to 75 g. Having a needle penetration hardness within the above range ensures moldability, particularly releasability, and also provides a smooth feel upon application to the skin, with little resistance and allowing the cosmetic preparation to spread with a light touch. The penetration hardness at 20° C. can be measured by the method described in the Examples below.

[0019] [Component (a)] The crosslinked organopolysiloxane of component (a) is a siloxane elastomer (silicone elastomer) in which polydimethylsiloxane is three-dimensionally crosslinked. The crosslinked organopolysiloxane of component (a) can mainly function to impart light scattering properties and a smooth feel.

[0020] In the present invention, the crosslinked organopolysiloxane may be either an emulsifying or non-emulsifying crosslinked organopolysiloxane, but from the viewpoint of safety and functionality, a non-emulsifying one is preferred. Note that "emulsifying" refers to one having a hydrophilic group (e.g., a polyoxyalkylene such as polyoxyethylene or polyoxypropylene, or a polyglycerin moiety) in the crosslinked portion, and "non-emulsifying" refers to one that essentially does not contain a hydrophilic group (e.g., a polyoxyalkylene or polyglycerin moiety) in the crosslinked portion and has no emulsifying ability.

[0021] Specific examples of component (a) include non-emulsifying organopolysiloxanes such as methylpolysiloxane crosspolymer and methylphenylpolysiloxane crosspolymer. The component (a) may be one of the above-mentioned compounds alone or a combination of two or more of them.

[0022] The crosslinked organopolysiloxane can be obtained, for example, by crosslinking a methylhydrogenpolysiloxane with a methylvinylpolysiloxane.

[0023] The crosslinked organopolysiloxane swells and gels in the presence of an oily agent. While it can be formulated in a solid state, it is preferable for it to be present in the oily solid cosmetic in a state swollen with component (d) or other oily agents, as described below. For example, it is in the form of a swollen substance swollen with various oily agents such as silicone oil, hydrocarbon oil, and ester oil. Examples of such commercially available products include swollen methylpolysiloxane crosspolymers such as "KSG-15" (dimethicone / vinyl dimethicone crosspolymer, a dimethicone mixture crosslinked at 4-10%), "KSG-16" (dimethicone / vinyl dimethicone crosspolymer, a dimethicone mixture crosslinked at 20-30%), "KSG-016F" (dimethicone / vinyl dimethicone crosspolymer, a dimethicone mixture crosslinked at 20-30%), and "KSG-19" (dimethicone / vinyl dimethicone crosspolymer, a dimethicone mixture crosslinked at 10-20%) (all manufactured by Shin-Etsu Chemical Co., Ltd.). Examples of swollen methylphenylpolysiloxane crosspolymers include "KSG-18A" (a mixture of (dimethicone / phenylvinyldimethicone) crosspolymer, diphenylsiloxyphenyltrimethicone crosslinked product (10-20%)) (manufactured by Shin-Etsu Chemical Co., Ltd.).

[0024] The content of component (a) is not particularly limited as long as it is an amount that imparts desirable matte texture and moldability to the oil-based solid cosmetic preparation, but for example, to obtain a matte texture, the content is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, and to ensure moldability, the content is preferably 3.0% by mass or less, more preferably 1.0% by mass to 2.5% by mass. If the content of component (a) exceeds 3.0% by mass, there is a risk that the product will not be able to be released from the mold, particularly when molding, and the formulation shape will not be able to be maintained.

[0025] [Component (b)] The solid oil of component (b) is at least one solid oil selected from the group consisting of hydrogenated castor oil and trihydroxystearin. The solid oil of component (b) has a triglyceride structure and, together with component (a), imparts a light diffusing effect, can function to impart a soft and smooth feel to the touch, and can also function to maintain a penetration hardness to ensure moldability.

[0026] The hydrogenated castor oil may be either one synthesized by a known method or a commercially available product, such as "Castor Hard" (manufactured by TKWAX CO., LTD.), "Castor Hardened Oil A" (manufactured by Ito Oil Mills, Ltd.), or "Castor Wax A Flakes" (manufactured by NOF Corporation), but is not limited to these.

[0027] The trihydroxystearin may be either one synthesized by a known method or a commercially available product, such as "THIXCIN® PC" (manufactured by Elementis) or "Pelemol GTHS" (manufactured by Phoenix Chemical Inc.), but is not limited to these.

[0028] Component (b) may be one of the above-mentioned compounds alone or a combination of two or more of them.

[0029] The content of component (b) is not particularly limited as long as it is an amount that provides the oil-based solid cosmetic with a desirable matte texture and moldability, but for example, to obtain a matte texture, it is preferably 2.0% by mass or more, and to ensure moldability, it is preferably 6.0% by mass or less, and more preferably 2.5% to 5.5% by mass.

[0030] The ratio of the contents of component (a) and component (b) is not particularly limited as long as it is an amount that provides the oil-based solid cosmetic with a desirable matte texture and moldability, but in light of the description of the Examples below, the ratio of the contents of component (a) and component (b) (content of component (b) / content of component (a)) is preferably 0.5 to 12, more preferably 0.6 to 4.5, even more preferably 1 to 4, and especially preferably 1.5 to 3.5. Furthermore, the total content of component (a) and component (b) is not particularly limited as long as it is an amount that provides the oil-based solid cosmetic with a desirable matte texture and moldability, but in light of the description of the examples below, it is, for example, preferably 2.5% by mass to 9.0% by mass, more preferably 3.0% by mass to 8.5% by mass, and even more preferably 4.0% by mass to 8.0% by mass, relative to the total amount of the oil-based solid cosmetic.

[0031] In one embodiment of the oil-based solid cosmetic of the present invention, it is preferable to contain a solid oil other than component (b) in order to maintain the form of the oil-based solid cosmetic and the desired needle penetration hardness. Examples of solid oils other than component (b) include oils that are solid at room temperature (20°C), such as naturally occurring and synthetic fats and oils, hydrocarbon oils, waxes, higher fatty acids, higher alcohols, and ester oils.

[0032] Examples of fats and oils include hardened coconut oil and hydrogenated palm oil.

[0033] Examples of hydrocarbon oils include ozokerite, ceresin, Japan wax, polyethylene wax, microcrystalline wax, paraffin wax, montan wax, Fischer-Tropsch wax, and synthetic wax.

[0034] Examples of waxes include beeswax, carnauba wax, candelilla wax, rice bran wax (rice wax), hydrogenated jojoba oil, montan wax, sugarcane wax, reduced lanolin, and hard lanolin.

[0035] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, hydroxystearic acid, and undecylenic acid.

[0036] Examples of higher alcohols include straight-chain alcohols (such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, and cetostearyl alcohol); and branched-chain alcohols (such as monostearyl glycerin ether (batyl alcohol)).

[0037] Examples of ester oils include myristyl myristate, cetyl myristate, stearyl stearate, cetyl stearate, cetyl palmitate, cholesteryl stearate, and cholesteryl oleate.

[0038] The solid oil other than component (b) is preferably a non-polar hydrocarbon wax having a melting point of 40 to 90°C, such as polyethylene wax, microcrystalline wax, or paraffin wax.

[0039] The solid oil other than component (b) may be one of the above-mentioned solid oils alone or a combination of two or more of them. The solid oil other than component (b) may be either one extracted or synthesized by a known method, or a commercially available product. Examples of commercially available solid oils include, but are not limited to, "IBERCER 6070" (paraffin wax), "IBERCER 2680" (microcrystalline wax) (both manufactured by Iberceras), "Paraffin Wax-155" (manufactured by Nippon Seiro Co., Ltd.), "refined paraffin wax" and "refined microcrystalline wax" (both manufactured by Nikko Rica Corporation), and "Multiwax W-445" (microcrystalline wax) (manufactured by Sonneborn LLC).

[0040] [Component (c)] The oil-absorbing powder of component (c) can function mainly to impart a light-scattering effect. In the present invention, the oil-absorbing powder refers to a water-insoluble powder that has an oil absorption capacity capable of absorbing 30% by mass or more of the powder's own weight of squalane at room temperature (20°C). The oil absorption can be measured by a known method. For example, 1 g of oil-absorbing powder is placed on a glass plate, and squalane is added dropwise in small amounts while kneading with a spatula. The end point is the point at which the oil-absorbing powder as a whole no longer maintains a free-flowing powder state and becomes paste-like (aggregated), and the amount of squalane (ml) per 1 g of oil-absorbing powder at this point is taken as the oil absorption.

[0041] Component (c) is preferably a powder having a substantially spherical shape, such as a spherical or ellipsoidal shape. Specific examples include, but are not limited to, silicone powders such as vinyl dimethicone / methicone silsesquioxane crosspolymer, starch octenyl succinate AL, cellulose, and silica. Among these, silicone powders coated with a silicone resin such as vinyl dimethicone / methicone silsesquioxane crosspolymer and surface-treated silica coated with iron oxide and titanium oxide are particularly preferred, from the viewpoint of achieving a sufficiently matte texture and a smoother feel.

[0042] Component (c) may be one of the above-mentioned compounds alone or a combination of two or more. Component (c) may be either a compound produced by a known method or a commercially available product. Examples of commercially available products include, but are not limited to, "KSP-100" and "KSP-101" (both manufactured by Shin-Etsu Chemical Co., Ltd.), "DRY FLO PURE" (manufactured by Nouryon Japan), "Sunsphere H-122" and "Sunsphere H-52" (both manufactured by AGC Si-Tech Co., Ltd.), "RonaFlair Flawless" (manufactured by Merck), and "CELLULOBEADS D5" (manufactured by Daito Chemical Industry Co., Ltd.).

[0043] The particle size of component (c) is not particularly limited, but the average particle size is, for example, preferably 1 μm to 30 μm, and more preferably 3 μm to 20 μm. The average particle size is the number-average particle size, and is obtained by observing particles with a scanning electron microscope (SEM), measuring the particle sizes of 100 or more randomly selected particles, and averaging the measured values.

[0044] The content of component (c) is not particularly limited, as long as it is an amount that provides the oily solid cosmetic with a desirable matte texture and feel when used, and can be set appropriately in relation to the other components. For example, it is preferably 0.1% by mass to 10% by mass, and in order to ensure a particularly matte texture, it is more preferably 1% by mass to 5% by mass, and even more preferably 1% by mass to 3% by mass.

[0045] The total content of component (a) and component (c) is not particularly limited as long as it is an amount that provides the oil-based solid cosmetic with a desirable matte texture and moldability, but in light of the description of the examples below, it is preferably 0.5% by mass to 13% by mass, and more preferably 2% by mass to 6% by mass, relative to the total amount of the oil-based solid cosmetic. Furthermore, the ratio of the total content of components (a) and (c) to the content of component (b) is not particularly limited, as long as it is an amount that provides the oily solid cosmetic with a desirable matte texture and moldability. However, in light of the description of the Examples below, for example, the ratio of the total content of components (a) and (c) to the content of component (b) (content of component (b) / [content of component (a)+content of component (c)]) is preferably 0.1 to 4, more preferably 0.3 to 1.5, even more preferably 0.4 to 1.25, and especially preferably 1.0 to 1.2 from the viewpoint of usability.

[0046] [Component (d)] In one embodiment of the oily solid cosmetic of the present invention, it is preferable to further contain a liquid oil (hereinafter also referred to as "component (d)") in order to obtain a satisfactory feeling when used, particularly a smooth feeling.

[0047] The liquid oil of component (d) is not particularly limited as long as it is a liquid oily component used in the field of cosmetics. More specifically, it includes animal and vegetable oils such as macadamia nut oil, almond oil, olive oil, castor oil, safflower oil, soybean oil, camellia oil, borage oil, and liquid lanolin; hydrocarbon oils such as liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, hydrogenated polyisobutene, isododecane, and squalane; silicone oils such as dimethicone, diphenylsiloxyphenyl trimethicone, dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, methylhydrogenpolysiloxane, and higher alcohol-modified silicone oil; perfluoro oils such as perfluoroalkyl ethers; isopropyl alcohol; Examples of the liquid oil include esters such as triglyceryl stearate, isopropyl myristate, cetyl 2-ethylhexanoate, diisostearyl malate, octyldodecyl myristate, isopropyl palmitate, triethylhexanoin, caprylic / capric triglyceride, polyglyceryl-2 triisostearate, dipentaerythrityl tetrahydroxystearate / isostearate, dipentaerythrityl hexahydroxystearate / stearate / rosinate, and diphytosteryl / octyldodecyl lauroyl glutamate; and higher alcohols such as oleyl alcohol and octyldodecanol. These liquid oils may be used alone or in combination of two or more. As the liquid oil, in order to obtain a sufficiently smooth feel while having a matte texture, it is preferable to use a known liquid oil that swells silicone powder, such as dimethicone, diphenylsiloxyphenyl trimethicone, triethylhexanoin, cyclopentasiloxane, or squalane, more preferably dimethicone, diphenylsiloxyphenyl trimethicone, or triethylhexanoin, and even more preferably dimethicone.

[0048] Component (d) may be either one extracted or synthesized by a known method or a commercially available product, such as, but not limited to, "KF-96A 6cs" and "KF-56A" (both manufactured by Shin-Etsu Chemical Co., Ltd.) and "Miritor GTEH" (manufactured by BASF Japan Ltd.).

[0049] Component (d) may be any component as long as it exhibits fluidity at room temperature (20°C) and atmospheric pressure (760 mmHg). From the viewpoints of smooth feel and spreadability upon application, the viscosity is preferably 1.0 mPa·s to 10,000 mPa·s (20°C), and more preferably 5.0 mPa·s to 6,000 mPa·s (20°C). The viscosity can be measured at 20°C using a BH-type viscometer ("VISCOMETER BH-II" manufactured by Toki Sangyo Co., Ltd.) (the rotor, rotation speed, and time can be set appropriately; for example, a No. 3 rotor, a rotation speed of 20 rpm, and a time period of 3 minutes can be set).

[0050] The content of component (d) is not particularly limited as long as it is an amount that can impart a smooth feel to the oil-based solid cosmetic, but for example, it is preferably 60% to 85% by mass, more preferably 62% to 75% by mass, and even more preferably 64% to 72% by mass. Furthermore, when dimethicone is included as component (d), the content of dimethicone is preferably 10% to 40% by mass, more preferably 12% to 30% by mass, and even more preferably 15% to 25% by mass, relative to the total amount of component (d). Furthermore, the content of dimethicone is preferably 5% to 20% by mass, and more preferably 9% to 17% by mass, relative to the total amount of the oil-based solid cosmetic.

[0051] The ratio of the contents of component (a) and component (d) is not particularly limited as long as it is an amount that provides the oil-based solid cosmetic with a desirable matte texture and moldability. However, in light of the description of the Examples below, the ratio of the contents of component (a) and component (d) (content of component (d) / content of component (a)) is preferably 20 to 170, more preferably 21 to 100, and even more preferably 25 to 90.

[0052] The oily solid cosmetic preparation of one embodiment of the present invention contains component (a), component (b), and component (c), and may further contain other components in addition to a solid oil other than component (c) and component (d), as long as the problem of the present invention can be solved.

[0053] The other components are not particularly limited, and examples thereof include components commonly used in oil-based solid cosmetics, such as colorants, extender pigments, moisturizers, preservatives, thickeners, antioxidants, antifoaming agents, cooling agents, warming agents, UV protection agents, vitamins, cosmetic ingredients, various other medicinal ingredients, fragrances, etc. The content of the other components can be appropriately determined by those skilled in the art as long as it does not interfere with the solution of the problems of the present invention. Some of the other components are listed below, but these are merely examples and are not limiting.

[0054] As the coloring agent, those that are usually blended in oil-based solid cosmetics can be used, such as pigments, dyes, pearlescent agents, glitter agents, and lakes thereof. Specifically, metal oxides such as titanium oxide, zinc oxide, iron oxide, yellow iron oxide, red iron oxide, black iron oxide, Prussian blue, ultramarine, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; inorganic pigments such as carbon black; Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, and Red No. 228; Examples include synthetic organic pigments such as Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue No. 404; dyes such as Red No. 218, Red No. 223, and Orange No. 201; pearlescent agents in which base particles such as mica are coated with titanium oxide; and glitter agents in which aluminum is vapor-deposited onto PET and then coated on both sides with resin to create a metallic luster. These can be used alone, or two or more can be combined to produce the desired color.

[0055] The content of the colorant is not particularly limited as long as it is an amount that can constitute an oily solid cosmetic, but for example, it is preferably 5% to 30% by mass, and more preferably 7% to 15% by mass.

[0056] Examples of extender pigments include mica, talc, sericite, synthetic fluorophlogopite, etc., which can be used alone or in combination of two or more. The content of the extender pigment is preferably 0% to 10% by mass, more preferably 1% to 5% by mass.

[0057] Examples of moisturizing agents include glycerin, concentrated glycerin, butylene glycol (BG), propylene glycol (PG), diglycerin, dipropylene glycol (DPG), pentylene glycol, hexanediol, heptanediol, ethylhexylglycerin, methyl gluceth-10, methyl gluceth-20, glucosylceramide, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, polyethylene glycol, sodium hyaluronate, trehalose, xylitol, maltitol, maltose, sorbitol, erythritol, raffinose, glucose, fructose, hydrolyzed elastin, sodium lactate, cyclodextrin, pyrrolidone carboxylic acid, Panax ginseng root extract, Angelica acutiloba root extract, and Angelica keiskei leaf / stem extract. These may be used alone or in combination. The content of the moisturizing agent is preferably 0% to 5% by mass.

[0058] Examples of preservatives include parahydroxybenzoates (parabens), phenoxyethanol, benzoic acid, salicylic acid, carbolic acid, sorbic acid, parachlormetacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, and photosensitizers, which can be used alone or in combination of two or more. The content of the preservative is preferably 0% by mass to 1% by mass.

[0059] Examples of thickeners include oil-soluble polymers, and specific examples include dextrin palmitate, inulin stearate, and non-aqueous dimethyl silylated silica. These thickeners can be used alone or in combination of two or more. The content of the thickener is preferably 0% to 2% by mass.

[0060] Examples of antioxidants include vitamin E and its derivatives such as dibutylhydroxytoluene, butylhydroxyanisole, and δ-tocopherol; thiotaurine, evening primrose extract, β-carotene, catechin compounds, flavonoid compounds, polyphenol compounds, and sodium pyrosulfite, and these can be used alone or in combination of two or more. The content of the antioxidant is preferably 0% by mass to 1% by mass.

[0061] Examples of anti-foaming agents include simethicone, etc. The content of the anti-foaming agent is preferably 0% by mass to 0.2% by mass.

[0062] Examples of cosmetic ingredients include apple tannin, licorice root extract, resveratrol, isomerized sugar, Morinda citrifolia juice, Citrus fruit extract, dipotassium glycyrrhizinate, stearyl glycyrrhetinate, shea butter, etc. These can be used alone or in combination of two or more. The content of the cosmetic ingredients is preferably 0% to 5% by mass.

[0063] In the oily solid cosmetic of one embodiment of the present invention, the total content of oily components such as solid oils and liquid oils is not particularly limited, but is generally about 62% to 95% by mass, preferably 70% to 90% by mass, and more preferably 75% to 85% by mass.

[0064] A non-limiting specific embodiment of the oil-based solid cosmetic according to one aspect of the present invention is an oil-based solid cosmetic that contains, relative to the total amount of the oil-based solid cosmetic, 0.5% by mass to 3.0% by mass of component (a), 2.0% by mass to 6.0% by mass of component (b), and 1.0% by mass to 10.0% by mass of component (c), wherein the total content of components (a) and (b) is 2.5% by mass to 9.0% by mass, (content of component (b) / content of component (a)) is 0.6 to 12.0, and (content of component (b) / [content of component (a)+content of component (c)]) is 0.1 to 4.0, thereby providing an oil-based solid cosmetic that has a matte texture, yet provides excellent moldability, and furthermore, is excellent in softness to the touch.

[0065] The oily solid cosmetic preparation of one embodiment of the present invention can be produced by a conventionally known method. For example, the crosslinked organopolysiloxane of component (a), the solid oil of component (b), and optionally a solid oil other than (b), the liquid oil of component (d), and optionally other ingredients are heated and melted, and then the oil-absorbing powder of component (c) and optionally other ingredients such as a colorant are added and mixed. The mixture is then degassed, poured into a mold, and cooled to solidify.

[0066] The oily solid cosmetic preparation of one embodiment of the present invention can be used in, for example, lipstick, lip balm, eye shadow, blush, concealer, and the like.

[0067] The present invention will be explained in more detail below with reference to examples. However, the present invention is not limited to these examples, and the present invention can take various forms as long as the object of the present invention can be achieved. [Example]

[0068] [1. Preparation of oily solid cosmetic preparation] Various oily solid cosmetic preparations were prepared as test cosmetic preparations according to the following procedures, in accordance with the formulations shown in Tables 1 to 3. The values in the tables represent mass % (wt%).

[0069] Ingredients No. 1 to No. 18 in Tables 1 to 3 were mixed uniformly and dissolved by heating at 90 to 95°C. Next, ingredients No. 19 to No. 30 in Tables 1 to 3 were added, mixed uniformly, and degassed to obtain a bulk. This bulk was filled into a mold suitable for various purposes at 90°C and cooled to solidify, thereby obtaining test cosmetics.

[0070] [2. Evaluation Method] (2-1) Penetration hardness The bulk was poured into a mold with a diameter of 11 mm, rapidly cooled and solidified, then removed from the mold and loaded into an outer container for the product, which was then left to stand overnight at 20°C to obtain a rod-shaped test cosmetic for measuring the penetration hardness. Next, this rod-shaped test cosmetic was fixed to a measurement table so that it was in a horizontal position, and using a rheometer "CR-3000EX-L" (manufactured by Sun Scientific Co., Ltd.) and a needle-type jig (adapter No. 38), the maximum force (g) was measured at a measurement temperature of 20°C and a table speed of 60 mm / min when the jig penetrated to a depth of 15 mm.

[0071] (2-2) Moldability (mold releasability) The bulk was poured into a mold with a diameter of 11 mm, rapidly cooled and solidified, and then the release state when removed from the mold was checked and the mold release properties were evaluated according to the following criteria. 〇: Can be released from the mold ×: Unable to release from mold or core shape cannot be maintained

[0072] (2-3) Stability over time The bulk was poured into a mold with a diameter of 11 mm, rapidly cooled and solidified, then removed from the mold and placed in an outer product container, which was then stored for 30 days in a thermostatic bath at 40°C, 45°C, and a high-temperature cycle (20°C to 40°C / 24H). After storage, the test cosmetics were visually inspected and evaluated for stability according to the following criteria. ○: Stable (no change) ×: Changes such as sweating, melting, or breaking

[0073] (2-4) Usability Eight panelists trained in the sensory evaluation of cosmetics were asked to apply the test cosmetic and the comparison product directly to the skin (lips), and then score the "softness to the touch" when applying to the skin and the "matte texture (matt feel)" after application on a three-point scale according to the following criteria, and the percentage of panelists who answered that the test cosmetic and the comparison product were equivalent to or better than the comparison product (2 or more on the three-point scale below) was calculated. Note that for products that received an "X" in the evaluation of moldability (releasability) in (2-2) above, an evaluation of the feel in use was not conducted. [Softness of touch] 3: The lead is less hard than the comparable product 2: The lead feels as hard as the comparison product 1: The lead feels harder than the comparison product The comparative product for the evaluation of "softness to the touch" was the commercially available product "Chifure Lipstick Y582" (manufactured by Chifure Cosmetics Co., Ltd.), which has a smooth feel that spreads with a light touch. [Matte texture] 3: More matte texture than the comparison product 2: Matte texture similar to the comparison product 1: Less matte than the comparison product, feels glossy The comparison product for the evaluation of "matte texture" was the commercially available product "Lip Color Riche Moist Matte N217" (manufactured by L'Oreal Paris), which promotes a matte texture. In Table 1, the evaluation of the feeling of use is shown according to the following criteria. ◎: Over 80% of panelists answered equal to or better than average ○: 70% to less than 80% answered "same to good" △: 50% to less than 70% answered equal to good ×: Less than 50% answered equal to or better than In addition, for Tables 2 and 3, the same test as in Table 1 was conducted by one panelist who had the highest accuracy among those who performed sensory evaluations of cosmetics. The usability was evaluated with 3 as ◎, 2 as ◯, and 1 as ×.

[0074] [3. Evaluation Results] The results of the various measurements are shown in Tables 1 to 3. The test cosmetics of Examples 1 to 24, which contained (a) a crosslinked organopolysiloxane, (b) a solid oil of hydrogenated castor oil or trihydroxystearin, and (c) an oil-absorbing powder, had a matte texture, excellent moldability, and also excellent softness to the touch. Furthermore, when the stability over time of Examples 1, 2, 10 to 12, and 17 to 24 was evaluated, no changes were observed even after leaving them for 30 days in a thermostatic bath at 40°C, 45°C, and a high-temperature cycle (20°C to 40°C / 24 hours), demonstrating excellent stability. The test cosmetics of Examples 1 to 24 all had a penetration hardness of 49 (g) or higher. Example 8 is an example containing 0.75 mass% of (a) crosslinked organopolysiloxane, and it was shown that even when the content of crosslinked organopolysiloxane was low, a matte texture could be obtained by using it together with (b) hydrogenated castor oil.On the other hand, Example 7 is an example containing 2.50 mass% of (a) crosslinked organopolysiloxane, and it was shown that even when the content of crosslinked organopolysiloxane was relatively high, moldability was ensured by using it together with (b) hydrogenated castor oil.

[0075] In contrast, the test cosmetics of Comparative Examples 1, 5, and 7, which contained (a) a crosslinked organopolysiloxane and (c) an oil-absorbing powder but did not contain the solid oil (b) hydrogenated castor oil or trihydroxystearin, did not achieve a sufficiently matte texture. Comparative Examples 8 and 9 are examples which contain (a) a crosslinked organopolysiloxane and (c) an oil-absorbing powder but did not contain the solid oil (b) hydrogenated castor oil or trihydroxystearin. Comparative Example 8 contains carnauba wax, and Comparative Example 9 contains candelilla wax, so although a matte texture is guaranteed, the waxes are hard, and therefore a soft touch is not achieved. Furthermore, the test cosmetic of Comparative Example 6, which contained (a) a crosslinked organopolysiloxane and (c) an oil-absorbing powder but did not contain (b) a solid oil such as hydrogenated castor oil or trihydroxystearin, did not exhibit good moldability. Comparative Example 6 contained hydroxystearic acid instead of the solid oil of (b) hydrogenated castor oil or trihydroxystearin. Hydroxystearic acid has a linear structure and hydroxyl groups, but its linear structure allows it to easily penetrate into the wax. It is believed that the hydroxyl groups react with nonpolar oils (e.g., polyethylene, paraffin, etc.) in the formulation to form a weak gel, inhibiting wax crystallization and resulting in poor moldability. As a result, the needle penetration hardness of the test cosmetic of Comparative Example 6 was less than 49 (g). On the other hand, hydrogenated castor oil or trihydroxystearin also contain hydroxyl groups, but due to their triglyceride structure, they are less likely to affect wax crystallization and therefore exhibit good moldability.

[0076] Furthermore, the test cosmetics of Comparative Examples 2 to 4, which contained (a) crosslinked organopolysiloxane and (b) hydrogenated castor oil but did not contain (c) oil-absorbing powder, all exhibited poor moldability or a matte texture. Example 7 contained (a) crosslinked organopolysiloxane, (b) solid oil of hydrogenated castor oil, and (c) oil-absorbing powder, while Comparative Example 2 contained the same components and amounts of components (a) and (b) as Example 7 but did not contain component (c). The results of Comparative Example 2 showing a poorer matte texture than Example 7 also demonstrate that cosmetics containing (b) hydrogenated castor oil and / or (c) oil-absorbing powder in addition to (a) crosslinked organopolysiloxane can achieve a matte texture. Furthermore, the test cosmetics of Comparative Examples 3 and 4, which contained (a) crosslinked organopolysiloxane and (b) solid oil of hydrogenated castor oil or trihydroxystearin but did not contain (c) oil-absorbing powder, had poor moldability due to the high content of (a) crosslinked organopolysiloxane. Furthermore, Reference Example 1, which contains (a) a crosslinked organopolysiloxane and (b) a solid oil of hydrogenated castor oil or trihydroxystearin, and (c) kaolin as an oil-absorbing powder, exhibited poor release properties. This is thought to be because crystallization was inhibited by the orientation of hydroxyl groups on the surface of the layered structure of kaolin (hydrated aluminum silicate).

[0077] The above results demonstrate that oil-based solid cosmetics containing (a) a crosslinked organopolysiloxane, (b) a solid oil of hydrogenated castor oil or trihydroxystearin, and (c) an oil-absorbing powder have a matte texture, excellent moldability, and excellent softness to the touch. Furthermore, the penetration hardness of these oil-based solid cosmetics was 49 (g) or higher.

[0078] [Table 1]

[0079] [Table 2]

[0080] [Table 3]

[0081] Among the ingredients in the table, the names of the products used are listed below. Polyethylene (synthetic wax): "Polyethylene Wax 500(C)" (melting point 83-90°C) (manufactured by Toa Kasei Co., Ltd.) Paraffin (Examples 1 to 16): "IBERCER 6070" (melting point 65 to 69°C) (manufactured by Iberceras) Paraffin (Examples 17 to 24): "Paraffin Wax-155" (melting point 69°C) (manufactured by Nippon Seiro Co., Ltd.) Microcrystalline wax (Examples 1, 4 to 16): "IBERCER 2680" (melting point 83 to 87°C) (manufactured by Iberceras) Microcrystalline wax (Examples 17 to 24): "Multiwax W-445" (melting point 76.7 to 82.2°C) (manufactured by Sonneborn LLC) Hydrogenated castor oil: "Hard Castor Oil" (melting point 85-87°C) (manufactured by TKWAX CO., LTD.) Trihydroxystearin: "THIXCIN® PC" (melting point 85-88°C) (manufactured by Elementis) Carnauba wax: "TOWAX-1F6" (melting point 80-86°C) (manufactured by Toa Kasei Co., Ltd.) Candelilla wax: "TOWAX-4F2" (melting point 66-72°C) (manufactured by Toa Kasei Co., Ltd.) Hydroxystearic acid: 12-hydroxystearic acid (melting point 75-78°C) (manufactured by Ito Oil Mills) (Dimethicone / vinyl dimethicone) crosspolymer: "KSG-16" (20-30% crosslinked) (Shin-Etsu Chemical Co., Ltd.) For convenience, the crosslinked content of (dimethicone / vinyl dimethicone) crosspolymer was calculated as 25% in the table. Dimethicone: "KF-96A 6cs" (dynamic viscosity 5-7mm 2 / s (25°C) (Shin-Etsu Chemical Co., Ltd.) Triethylhexanoin: "Miritol GTEH" (BASF Japan) Diphenylsiloxyphenyl trimethicone: "KF-56A" (dynamic viscosity 10-20 mm 2 / s (25°C) (Shin-Etsu Chemical Co., Ltd.) Diisostearyl malate: "Cosmol 222" (viscosity 5500 mPa·s (20°C)) (manufactured by Nisshin Oillio Group Co., Ltd.) Polyglyceryl-2 triisostearate: "Cosmol 43V" (viscosity 448 mPa·s (20°C)) (manufactured by Nisshin Oillio Group Co., Ltd.) Dipentaerythrityl hexahydroxystearate / hexastearate / hexarosinate: "Cosmol 168ARV" (melting point 34-43°C) (manufactured by Nisshin Oillio Group Co., Ltd.) Hydrogenated polyisobutene: "Pearleam 18" (kinematic viscosity 270-400mm 2 / s (98.9℃) (NOF Corporation) Phytosteryl / octyldodecyl lauroyl glutamate: "ELDEW PS-203R" (viscosity 1000 mPa·s (30°C)) (Ajinomoto Co., Inc.) Squalane: "NIKKOL Sugar Squalane" (viscosity 19.8 mPa·s (25°C)) (manufactured by Nikko Chemicals Co., Ltd.) Surface-treated mica: "SA-Mica Y3000" (plate-shaped, particle size 23 μm) (manufactured by Yamaguchi Mica Co., Ltd.) (Vinyl dimethicone / methicone silsesquioxane) crosspolymer: "KSP-100" (spherical, particle size 5 μm) (Shin-Etsu Chemical Co., Ltd.) Starch octenyl succinate AL: "DRY FLO PURE" (particle size 5-20 μm) (manufactured by Nouryon Japan Co., Ltd.) Silica: "Sunsphere H-122" (spherical, particle size 12 μm) (AGC Si-Tech Co., Ltd.) Surface-treated silica: "RonaFlair Flawless" (spherical, particle size 1.0 to 25.0 μm) (manufactured by MERCK) Cellulose: "CELLULOBEADS D5" (spherical, particle size 5 μm) (manufactured by Daito Kasei Kogyo Co., Ltd.) Kaolin: "Pharmacopoeial Kaolin (sterilized)" (plate) (manufactured by Shokozan Kogyosho Co., Ltd.) Simethicone: "KS-66" (Shin-Etsu Chemical Co., Ltd.) Stearyl glycyrrhetinate: "C-O-Retinol" (Maruzen Pharmaceuticals) [Industrial Applicability]

[0082] The oil-based solid cosmetic preparation of one embodiment of the present invention has a matte texture while being excellent in moldability, and further has a soft and smooth feel to the touch (smooth application feel) while also exhibiting good stability over time. Therefore, the oil-based solid cosmetic preparation can be used as a makeup cosmetic preparation such as lipstick, lip balm, eye shadow, blush, concealer, etc.

Claims

1. (a) a crosslinked organopolysiloxane; (b) at least one solid oil selected from the group consisting of hydrogenated castor oil and trihydroxystearin; (c) Oil-absorbing powder and An oily solid cosmetic comprising:

2. 2. The oily solid cosmetic preparation according to claim 1, wherein the (a) crosslinked organopolysiloxane is at least one crosslinked organopolysiloxane selected from the group consisting of methylpolysiloxane crosspolymers and methylphenylpolysiloxane crosspolymers.

3. 2. The oily solid cosmetic preparation according to claim 1, wherein the oil-absorbing powder (c) is at least one powder selected from the group consisting of vinyl dimethicone / methicone silsesquioxane crosspolymer, starch AL octenyl succinate, cellulose, and silica.

4. The oily solid cosmetic according to claim 1, further comprising (d) a liquid oil.

5. 5. The oily solid cosmetic according to claim 4, wherein the liquid oil (d) is at least one liquid oil selected from the group consisting of dimethicone, triethylhexanoin, and diphenylsiloxyphenyl trimethicone.

6. 2. The oily solid cosmetic preparation according to claim 1, wherein the content of the crosslinked organopolysiloxane (a) is 3.0% by mass or less.

7. 2. The oily solid cosmetic preparation according to claim 1, wherein the content of said (b) at least one solid oil selected from the group consisting of hydrogenated castor oil and trihydroxystearin is 2.5% by mass or more.

8. 2. The oily solid cosmetic according to claim 1, which has a needle penetration hardness at 20°C of 49 (g) or more.

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