Oily solid cleansing cosmetic

Abstract

To provide an oily solid cleansing cosmetic which can be solidified uniformly and has improved usability such as temporal stability, detergency, easy taking-up by fingers and ease of melting during use.SOLUTION: There is provided an oily solid cleansing cosmetic which contains, as a component (A), 3.5 to 12 mass% of a solid hydrocarbon oil having no branched chain which has a melting point of 75°C or more and has, as a component (B), a component (b1) and a component (b2) and contains, as the component (b1), 1 to 20 mass% of a surfactant having an HLB value of 10 or more and as the component (b2), 5 to 20 mass% of a surfactant having an HLB value of less than 10, as a component (C), 5 to 15 mass% of a liquid oil having an IOB value of 0.2 to 0.35 and as a component (C), 3 to 50 mass% of a liquid hydrocarbon oil and substantially contains no solid hydrocarbon oil having a branched chain.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] In recent years, "balm-like" oil-based solid cleansing cosmetics have become popular as cleansing cosmetics for makeup removal. Because such oil-based solid cleansing cosmetics can be formulated with a large amount of oil, like oil-based cleansing cosmetics, they have high cleansing power, a moist feel, and a pleasant application sensation. Furthermore, while oil-based cleansing cosmetics can be difficult to use because they tend to drip when applied to the skin, oil-based solid cleansing cosmetics have the advantage of being solid and therefore remaining on the skin more easily, allowing them to blend easily with makeup and sebum. For this reason, various technologies for oil-based solid cleansing cosmetics have been made public.

[0003] For example, Patent Document 1 discloses an oil-based solid cleansing cosmetic characterized by containing (A) 1 to 30 mass% of a solid oil having a melting point of 50 to 120°C, (B) 50 to 97 mass% of a liquid oil, (C) 3 to 30 mass% of a nonionic surfactant having an HLB value of 5 to 13, (D) 0.1 to 20 mass% of a powder having a volume average particle size of 1 to 200 μm, and (E) 0.1 to 10 mass% of fumed silica (proportion relative to the total amount of the cosmetic), and Patent Document 2 discloses a cleansing cosmetic characterized by containing (A) 1 to 30 mass% of a solid oil having a melting point of 50 to 120°C, (B) 50 to 97 mass% of a liquid oil, (C) Patent Document 3 discloses an oil-based solid cleansing cosmetic that contains 3 to 30 mass% of a nonionic surfactant with an HLB value of 5 to 13, (D) 0.1 to 20 mass% of Moroccan lava clay, and (E) 0.1 to 10 mass% of fumed silica (ratio relative to the total amount of the cosmetic). Patent Document 3 discloses a solid cleansing agent that contains 10 to 98 mass% of (A) a paste-like or solid oil agent with a melting point of 30 to 55°C, (B) an oil agent that is liquid at 25°C, and (C) a solid oil agent with a melting point of 55 to 120°C, and has a consistency value of 30 to 250 at 30°C.

[0004] Patent Document 4 discloses a solid oil-based cleansing cosmetic characterized by containing (A) 5 to 15 mass% of a hydrocarbon oil having a melting point of 60 to 120°C based on the total amount of the cosmetic, (B) a liquid oil containing 35 mass% or more of an ester oil based on the total amount of the liquid oil, and (C) 5 to 30 mass% of a nonionic surfactant having an HLB value of 5 to 13 based on the total amount of the cosmetic. Patent Document 5 discloses a solid oil-based cleansing cosmetic characterized by containing (A) a hydrocarbon oil having a melting point of 40 to 120°C based on the total amount of the cosmetic, (B) a liquid oil containing 45 mass% or more of an ester oil based on the total amount of the liquid oil, and (C) a nonionic surfactant having an HLB value of 5 to 11 based on the total amount of the cosmetic. A solid oil-based cleansing cosmetic is disclosed that contains an anionic surfactant and (D) a fatty acid dextrin whose constituent fatty acids are fatty acids having from 15 to 20 carbon atoms, and the mass ratio of the ester oil in component (B) to component (D) [(ester oil) / (D)] is from 3 to 15. Patent Document 6 discloses a solid oil-based cleansing cosmetic that contains a liquid oil, a solid oil, a surfactant, and at least one crystal disintegrating aid selected from the group consisting of N-capryloyl lysine, lauroyl lysine, and barium sulfate. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-26420 [Patent Document 2] Japanese Patent Application Publication No. 2020-26419 [Patent Document 3] Japanese Patent Application Laid-Open No. 2003-95917 [Patent Document 4] Japanese Patent Application Laid-Open No. 2012-206974 [Patent Document 5] Japanese Patent Application Laid-Open No. 2017-95375 [Patent Document 6] Japanese Patent Application Publication No. 2019-81740 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technologies described in Patent Documents 1 and 2 use fumed silica as an essential ingredient, and although they describe oil-based solid cleansing cosmetics in which activated carbon or clay is dispersed with dimethyl silylated silica, dimethyl silylated silica has a distinctive squeaky feeling that makes it difficult to use, and the cleansing power is also poor with the configurations described in Patent Documents 1 and 2. Furthermore, the technology described in Patent Document 3 discloses a cleansing cosmetic that contains 10 to 98 mass % of (A) a paste-like or solid oil agent having a melting point of 30 to 55°C, and contains 80 mass % of a liquid hydrocarbon oil and 18 mass % of a paste-like or solid oil agent, but 10 mass % of the paste-like or solid oil agent is paste-like petrolatum, and its structure contains a branched chain, which causes stability problems.

[0007] Furthermore, the technologies described in Patent Documents 4 and 5 contain liquid hydrocarbon oils to improve cleaning power, but microcrystalline wax is a solid oil containing branched chains in its structure, which causes stability problems.Furthermore, the technology described in Patent Document 6 uses a crystal disintegration aid as an essential ingredient, and discloses a cosmetic containing 70% by mass of olefin oligomer and 10% by mass of polyethylene wax, but because the crystal disintegration aid is an essential ingredient and the amount of hydrocarbon oil exceeds 50% by mass, there is a problem of deterioration in the condition of the cosmetic, and further, because it does not contain a surfactant with an HLB of less than 10, there is a problem with cleansing ability.

[0008] In addition, although it is effective to include a certain amount of liquid hydrocarbon oil as a means for improving the cleansing power of oil-based solid cleansing cosmetics, there is a problem that as the amount of liquid hydrocarbon oil increases, it becomes more difficult to solidify, making it difficult to maintain stable quality. Furthermore, if the amount of solid oil is increased to solidify, there is a concern that the solid cosmetic becomes too hard, making it difficult to remove, and thus worsening usability. Therefore, liquid hydrocarbon oil and solid oil have traditionally been in a trade-off relationship, making it difficult to balance the blending amounts, and improvement in this area has been desired.

[0009] Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide an oil-based solid cleansing cosmetic that can be solidified uniformly and has improved usability such as stability over time, cleansing power, ease of finger removal, and ease of melting during use. [Means for solving the problem]

[0010] As a result of intensive research into solving the above-mentioned problems, the present inventors have found that the above-mentioned object can be achieved by preparing an oil-based solid cleansing cosmetic composition containing a solid hydrocarbon oil having a specific melting point and blending amount, two or more surfactants with different HLBs, a liquid oil having an IOB value within a specific range, and a liquid hydrocarbon oil, and have thus completed the present invention.

[0011] That is, the oily solid cleansing cosmetic of the present invention has the following properties: As component (A), 3.5 to 12 mass% of a solid hydrocarbon oil having a melting point of 75°C or higher and no branched chain, The component (B) comprises a component (b1) and a component (b2), the component (b1) comprising 1 to 20 mass% of a surfactant having an HLB value of 10 or more, and the component (b2) comprising 5 to 20 mass% of a surfactant having an HLB value of less than 10, As a component (C), 5 to 15% by mass of a liquid oil having an IOB value of 0.2 to 0.35, As a component (D), 3 to 50 mass% of a liquid hydrocarbon oil, and is substantially free of branched-chain solid hydrocarbon oils.

[0012] The oily solid cleansing cosmetic of the present invention further comprises: The component (A) contains the component (a1) and the component (a2), As the component (a1), a solid hydrocarbon oil having a melting point of 75°C or more and less than 90°C, As the component (a2), a solid hydrocarbon oil having a melting point of 90°C or higher, When the total mass of the (a1) components contained in the (A) component is taken as 1, the total mass of the (a2) components is preferably greater than 0 and not greater than 6.

[0013] Furthermore, the oily solid cleansing cosmetic of the present invention preferably contains a volatile hydrocarbon oil as component (d1) as component (D), and when the total mass of component (D) is taken as 1, the mass of component (d1) in component (D) is preferably 0.1 or more. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide an oily solid cleansing cosmetic that can be solidified uniformly and has improved usability such as stability over time, cleansing power, ease of removal with fingers, and ease of melting during use. DETAILED DESCRIPTION OF THE INVENTION

[0015] The oily solid cleansing cosmetic of the present invention will be specifically described below, but the present invention is not limited to the embodiments described in this specification. The oil-based solid cleansing cosmetic of the present invention comprises, as component (A), 3.5 to 12 mass% of a solid hydrocarbon oil having a melting point of 75°C or higher and no branched chain, as component (B), components (b1) and (b2), wherein component (b1) comprises 1 to 20 mass% of a surfactant having an HLB value of 10 or higher, as component (b2) comprise 5 to 20 mass% of a surfactant having an HLB value of less than 10, as component (C), 5 to 15 mass% of a liquid oil having an IOB value of 0.2 to 0.35, and as component (D), 3 to 50 mass% of a liquid hydrocarbon oil, and is substantially free of branched chain solid hydrocarbon oil. This allows for the provision of an oil-based solid cleansing cosmetic that can be solidified uniformly and has improved usability, such as stability over time, cleansing power, ease of finger removal, and ease of melting during use.

[0016] The oil-based solid cleansing cosmetic of the present invention has a content of the unbranched solid hydrocarbon oil having a melting point of 75°C or higher, which is component (A), of 3.5 to 12% by mass, preferably 4 to 10% by mass, and more preferably 5 to 8% by mass. If the content of the unbranched solid hydrocarbon oil having a melting point of 75°C or higher is more than 12% by mass, the oil-based solid cleansing cosmetic becomes too hard and its usability deteriorates, whereas if the content of the unbranched solid hydrocarbon oil having a melting point of 75°C or higher is less than 3.5% by mass, the oil-based solid cleansing cosmetic does not solidify and its stability deteriorates, failing to achieve the effects of the present invention.

[0017] Furthermore, the oil-based solid cleansing cosmetic of the present invention preferably contains component (a1) and component (a2) as component (A), with component (a1) being a solid hydrocarbon oil with a melting point of 75° C. or more and less than 90° C., and component (a2) being a solid hydrocarbon oil with a melting point of 90° C. or more. Not including component (a1) may result in poor usability and cleansing properties, and not including component (a2) may result in poor stability, which is undesirable.

[0018] Furthermore, in the oil-based solid cleansing cosmetic of the present invention, when the total mass of the (a1) component contained in the (A) component is taken as 1, the total mass of the (a2) component is preferably greater than 0 and not greater than 6, and even more preferably 0.2 to 3.5. When the total mass of the (a1) component contained in the (A) component is taken as 1, if the total mass of the (a2) component is greater than 6, usability and cleansing properties may deteriorate, which is not preferred. Also, if the total mass of the (a2) component is less than 0.2, stability may deteriorate, which is not preferred.

[0019] In the present invention, the solid hydrocarbon oil having a melting point of 75°C or higher and no branched chain as component (A) refers to a solid hydrocarbon oil having a melting point of 75°C or higher and no branched chain, and is not particularly limited as long as it can be used in ordinary cosmetics and provides the effects of the present invention. For example, a synthetic wax may be used as the cosmetic product name. Such a synthetic wax is a hydrocarbon wax produced by the Fischer-Tropsch process or the ethylene polymerization process. Furthermore, the solid hydrocarbon oil having a melting point of 75°C or higher and lower than 90°C as component (a1) can be the above-mentioned synthetic wax. Commercially available products include, for example, CireWax 80 (manufactured by Cirebelle Fine Chemicals (Pty) Ltd.), Jeenate 5SW (manufactured by Shima Trading Co., Ltd.), and VB-8070 (manufactured by Nippon Wax Co., Ltd.). The component (a1) may be used alone or in combination of two or more types. The solid hydrocarbon oil having a melting point of 90°C or higher in component (a2) can be the synthetic waxes described above. Commercially available products include, for example, CireWax 90 (manufactured by Cirebelle Fine Chemicals (Pty) Ltd.), Jeenate 6SW (manufactured by Shima Trading Co., Ltd.), and Lip Wax A-4 (manufactured by Nippon Natural Products Co., Ltd.). The component (a2) may be used alone or in combination with two or more. Furthermore, from the perspective of stability, the present invention is substantially free of branched-chain solid hydrocarbon oils such as microcrystalline wax. "Substantially free" means that the amount of branched-chain solid hydrocarbon oil in the total cosmetic is less than 0.1% by mass, meaning that branched-chain solid hydrocarbon oils are not intentionally added, but are present at a level that could be unavoidably mixed in. In the present invention, the melting point refers to the temperature at which melting occurs, converting a solid into a liquid. If there is a range of melting point temperatures, the median temperature is indicated.

[0020] Furthermore, the oil-based solid cleansing cosmetic of the present invention comprises component (b1) and component (b2) as component (B), and the content of surfactants in component (b1) with an HLB value of 10 or greater is preferably 1 to 20% by mass, and the content of surfactants in component (b2) with an HLB value of less than 10 is preferably 5 to 20% by mass, and the content of surfactants in component (b1) with an HLB value of 10 or greater is preferably 5 to 15% by mass, and the content of surfactants in component (b2) with an HLB value of less than 10 is preferably 7 to 15% by mass, and more preferably the content of surfactants in component (b1) with an HLB value of 10 or greater is preferably 8 to 12% by mass, and the content of surfactants in component (b2) with an HLB value of less than 10 is preferably 9 to 11% by mass. If the content of surfactants with an HLB value of 10 or more in the (b1) component is greater than 20% by mass, skin irritation will occur and detergency will be further impaired. If the content of surfactants with an HLB value of 10 or more in the (b1) component is less than 1% by mass, detergency will be impaired, and the effects of the present invention will not be achieved. Furthermore, if the content of surfactants with an HLB value of less than 10 in the (b2) component is greater than 20% by mass, skin irritation will occur and detergency will be further impaired. If the content of surfactants with an HLB value of less than 10 in the (b2) component is less than 5% by mass, detergency will be impaired, and the effects of the present invention will not be achieved. Here, the HLB value is an index that represents the ratio of the relative affinity of a surfactant for both liquids in an oil-water system, and refers to the HLB value at 25°C as defined by Griffin. The Griffin HLB value is defined in "J. Soc. Cosm. Chem., 1954, 5:249-256." When using commercially available products, the HLB value labeled on the product may be used.

[0021] In the present invention, the surfactant (b1) having an HLB value of 10 or higher is not particularly limited as long as it has an HLB value of 10 or higher, can be used in ordinary cosmetics, and provides the effects of the present invention. Examples include polyoxyalkylene fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene alkyl ethers, polyoxyalkylene alkylphenyl ethers, polyoxyalkylene glycol fatty acid esters, polyoxyalkylene fatty acid monoalkanolamides, and polyoxyalkylene fatty acid dialkanolamides. One or more of these can be selected and used as needed. Among these, polyoxyalkylene fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, and polyoxyalkylene fatty acid esters are preferred due to their superior stability. Examples of the polyoxyalkylene fatty acid esters include sorbeth-30 tetraoleate and sorbeth-40 tetraoleate. Examples of commercially available products include NIKKOL (registered trademark) GO-430NV (trade name) and NIKKOL (registered trademark) GO-440V (trade name) manufactured by Nikko Chemicals Co., Ltd. Any of the above may be used alone or in combination of two or more types, and when two or more types are combined, the ratio thereof may be any.

[0022] Furthermore, in the present invention, the surfactant (b2) having an HLB value of less than 10 is not particularly limited as long as it has an HLB value of less than 10, can be used in ordinary cosmetics, and provides the effects of the present invention. Examples include polyoxyethylene fatty acid glyceryl, fatty acid polyoxyethylene sorbitan, polyoxyethylene fatty acid ester, etc., and one or more types can be appropriately selected and used as needed. Among these, polyoxyethylene fatty acid glyceryl is preferred due to its superior stability. Examples of the polyoxyethylene fatty acid glyceryl include PEG-10 glyceryl diisostearate, PEG-3 glyceryl triisostearate, PEG-5 glyceryl triisostearate, PEG-10 glyceryl triisostearate, PEG-15 glyceryl triisostearate, PEG-20 glyceryl triisostearate, etc. Examples of commercially available products include PEG-10 glyceryl diisostearate under the trade name EMALEX (registered trademark) GWIS-210EX (trade name) manufactured by Nippon Emulsion Co., Ltd., and PEG-5 glyceryl triisostearate under the trade name EMALEX (registered trademark) GWIS-305 (trade name) manufactured by Nippon Emulsion Co., Ltd., and Uniox (registered trademark) GM-5IS (trade name) manufactured by NOF Corporation. Any of the above may be used alone or in combination of two or more types, and when two or more types are combined, the ratio may be arbitrary.

[0023] The oil-based solid cleansing cosmetic of the present invention also contains component (C), a liquid oil having an IOB value of 0.2 to 0.35, at a content of 5 to 15% by mass, preferably 6 to 14% by mass, and more preferably 8 to 12% by mass. If the content of the liquid oil having an IOB value of 0.2 to 0.35 is greater than 15% by mass, the usability of the oil-based solid cleansing cosmetic deteriorates. If the content of the liquid oil having an IOB value of 0.2 to 0.35 is less than 5% by mass, the cleansing power deteriorates, and further, the usability and stability deteriorate, failing to achieve the effects of the present invention. Here, "IOB value" is an abbreviation for Inorganic / Organic Balance (IOB value), a value calculated based on the Organic Conceptual Diagram (Fujita Atsushi, Chemistry, 1957, Vol. 11, No. 10, pp. 719-725). When a commercially available liquid oil is used, the IOB value labeled on the product may be used.

[0024] Furthermore, in the present invention, the liquid oil having an IOB value of 0.2 to 0.35 for component (C) is a liquid oil having an IOB value of 0.2 to 0.35, is usable in ordinary cosmetics, and is not particularly limited as long as it can achieve the effects of the present invention. Examples include polyglyceryl-2 triisostearate (IOB=0.26), caprylic / capric triglyceride (IOB=0.32), phytosteryl / octyldodecyl lauroyl glutamate (IOB=0.30), neopentyl glycol dicaprate (IOB=0.25), isononyl isononanoate (IOB=0.20), neopentyl glycol diethylhexanoate (IOB=0.32), triethylhexanoin (IOB=0.35), diisostearyl malate (IOB=0.33), and octyldodecanol (IOB=0.26). Any one of the above may be used alone or in combination of two or more thereof, and when two or more are combined, the ratio thereof may be any.

[0025] The oil-based solid cleansing cosmetic of the present invention also contains a liquid hydrocarbon oil as component (D), the content of which is 3 to 50% by mass, preferably 5 to 40% by mass, and more preferably 10 to 35% by mass. If the liquid hydrocarbon oil content is greater than 50% by mass, the oil-based solid cleansing cosmetic will not solidify, resulting in poor stability and ease of use. If the liquid hydrocarbon oil content is less than 3% by mass, the cleansing power will be poor, and the effects of the present invention will not be achieved.

[0026] Furthermore, from the viewpoint of improving cleansing performance, the oil-based solid cleansing cosmetic of the present invention desirably contains a volatile hydrocarbon oil as component (d1) as component (D). When the total mass of component (D) is taken as 1, the mass of component (d1) in component (D) is preferably 0.1 or more. If the mass of component (d1) in component (D) is less than 0.1, no improvement in cleansing power is observed, which is not preferable.

[0027] Furthermore, in the present invention, the liquid hydrocarbon oil of component (d1) is a hydrocarbon oil that is liquid at room temperature (25°C), can be used in ordinary cosmetics, and is not particularly limited as long as it can provide the effects of the present invention, but examples include liquid paraffin, squalane, polybutene, isoparaffin, α-olefin oligomer, etc. Furthermore, any of the above may be used alone or in combination of two or more types, and when two or more types are combined, the ratio thereof may be any.

[0028] Furthermore, in the present invention, the component (d1) is not particularly limited as long as it is a volatile hydrocarbon oil that is liquid at room temperature (25°C), can be used in ordinary cosmetics, and can provide the effects of the present invention, but examples include dodecane, (C9-12) alkanes, (C10-13) alkanes, hydrogenated polyisobutene, isododecane, isohexadecane, light liquid isoparaffin, etc. Furthermore, any of the above may be used alone or in combination of two or more types, and when two or more types are combined, the ratio thereof may be any.

[0029] Furthermore, the oil-based solid cleansing cosmetic of the present invention can contain solid oils and semi-solid oils other than the above-mentioned components, as long as the content is such that the effects of the present invention can be obtained. Such solid oils and semi-solid oils are not particularly limited as long as they are solid oils used in ordinary oil-based solid cleansing cosmetics, but for example, solid fats: solid fats such as hydrogenated coconut oil, Japan wax kernel oil, hydrogenated oil, Japan wax, and hydrogenated castor oil; hydrocarbon oils such as beeswax, cotton wax, carnauba wax, bayberry wax, ibex wax, spermaceti wax, montan wax, bran wax, kapok wax, sugarcane wax, shellac wax, and solid paraffin; higher fatty acids such as myristic acid, palmitic acid, stearic acid, and behenic acid; Higher alcohols such as ethyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, and cetostearyl alcohol, semi-solid fats: cocoa butter, lanolin acetate, lanolin, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, polyethylene glycol lanolinate, and waxes such as POE hydrogenated lanolin alcohol ether, reduced lanolin, hard lanolin, hydrogenated castor oil stearate, hydrogenated castor oil isostearate, tri(caprylic / capric / myristyl / stearic acid)glyceryl, shea butter, cholesteryl hydroxystearate, cholesteryl isostearate, dihydrocholesteryl macadamiate, phytosteryl ricinoleate, phytosteryl isostearate, phytosteryl macadamiate, lanolin, octyldodecyl lanolinate, dipentaerythrityl hexahydroxystearate, (hydroxystearic acid / stearic acid / rosin) Examples of suitable solid oils include dipentaerythrityl (hydroxystearic acid / isostearate), dipentaerythrityl rosinate, hydroxyalkyl dimer dilinoleyl ether, hydrogenated dimer acid di(phytosteryl-isostearyl-cetyl-stearyl-behenyl) ester, N-lauroyl-L-glutamic acid di(cholesteryl-behenyl-octyldodecyl), and hydrogenated vegetable oil. One or more solid oils can be selected and blended. From the viewpoint of stability, the content of these solid and semi-solid oils is preferably 1% by mass or less.

[0030] Furthermore, the oil-based solid cleansing cosmetic of the present invention can contain liquid oils, powders, etc. other than the above-mentioned components, as long as the content is such that the effects of the present invention can be obtained. Such liquid oils are not particularly limited as long as they are liquid oils used in ordinary oil-based solid cleansing cosmetics, but for example, plant-derived triglycerides such as coconut oil, safflower oil, soybean oil, grape seed oil, sesame oil, wheat germ oil, avocado oil, olive oil, olive squalane, castor oil, macadamia nut oil, medfoam oil, sunflower oil, palm oil, almond oil, rosehip oil, apricot oil, camellia oil, evening primrose oil, etc., dimer diol or dimer acid esters, mink oil, tart Animal oils such as lanolin and liquid lanolin; fatty acid esters of lower alcohols such as isopropyl myristate, isopropyl isostearate, and lanolin fatty acid isopropyl; fatty acid esters of higher alcohols such as 2-ethylhexyl isononanoate, octyldodecyl myristate, octyldodecyl oleate, cetyl 2-ethylhexanoate, isocetyl 2-ethylhexanoate, hexyl laurate, and isostearyl isostearate; hydroxy acid esters of higher alcohols such as cetyl lactate; glycerin tricaprylate Fatty acid esters of polyhydric alcohols such as glyceryl tri-2-ethylhexanoate, propylene glycol dicaprylate, propylene glycol di(capryl-caprate), propylene glycol diisostearate, and neopentyl glycol di-2-ethylhexanoate; higher fatty acids such as oleic acid, erucic acid, linoleic acid, and isostearic acid; higher alcohols such as oleyl alcohol and isostearyl alcohol; dimethylpolysiloxane, methylphenylpolysiloxane, and diphenylpolysiloxane. Examples of the liquid oil include linear polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and the like; silicone oils such as modified polysiloxanes such as amino-modified polysiloxanes, polyether-modified polysiloxanes, alkyl-modified polysiloxanes, and fluorine-modified polysiloxanes; and fluorine oils such as perfluoropolyethers and perfluorocarbons. One or more liquid oils can be selected and blended as desired.Furthermore, the powder is not particularly limited as long as it is a powder used in ordinary oil-based solid cleansing cosmetics, and examples thereof include talc, kaolin, mica, synthetic mica, silica, barium sulfate, boron nitride, nylon powder, polyethylene powder, organopolysiloxane elastomer, bentonite, smectite, aluminum silicate, calcium silicate, magnesium silicate, silicic anhydride, crystalline cellulose, polymethacrylate (methyl, ethyl ester), polyacrylate (methyl, ethyl ester), Examples of suitable powder bases include esters, nylon powder, polyvinylpyrrolidone, and titanium dioxide; scrubbing agents such as clays, peach kernels, and sea salt; charcoal, zinc oxide, iron oxide (e.g., red iron oxide), ultramarine, Prussian blue, pearl pigments (e.g., titanium dioxide); aluminum powder; and organic dyes and lakes thereof, such as Red No. 104, Red No. 201, Red No. 202, Red No. 226, Yellow No. 4, Orange No. 204, Blue No. 404, Blue No. 1, and Green No. 3. One or more types of powders can be selected and blended. Examples of powder shapes include spherical, spherical-like, plate-like, and needle-like shapes. Both porous and non-porous powders can be used. However, it is preferable not to include dimethylsilylated silica. As shown in Comparative Example 7 below, dimethylsilylated silica is undesirable because it produces a distinctive squeaky feeling that deteriorates usability and further deteriorates cleaning power.

[0031] In the present invention, the oil-based solid cleansing cosmetic composition may contain, in addition to the above-mentioned components, other components typically used in cosmetics, pharmaceuticals, etc., within the scope of not impairing the effects of the present invention. Examples of such components include moisturizers, various polymers and resins, surfactants, film-forming agents, thickeners, ultraviolet absorbers, lower alcohols, polyhydric alcohols, pigments, water, vitamins, preservatives, antioxidants, fragrances, etc.

[0032] Furthermore, in the present invention, the oily solid cleansing cosmetic is one that can be used on the human body, etc., and does not exclude applications such as quasi-drugs and pharmaceuticals, but is primarily a basic cosmetic (external skin preparation), specifically an oily cleansing cosmetic that has a washing and cleansing effect.

[0033] In the present invention, the oily solid cleansing cosmetic can be produced by a method for producing ordinary cosmetics.

[0034] The present invention will be described in more detail below using examples, but the present invention is not limited to these examples. Furthermore, the numerical values ​​in the formulations below represent mass %. [Example]

[0035] (Examples 1 to 19, Comparative Examples 1 to 8) Oil-based solid cleansing cosmetics of Examples 1 to 19 and Comparative Examples 1 to 8 were prepared under the conditions shown in Tables 1 to 5. The obtained oil-based solid cleansing cosmetics of Examples 1 to 19 and Comparative Examples 1 to 8 were subjected to the following condition test, usability test, stability over time test, and detergency test, and the results are also shown in Tables 1 to 5.

[0036] (State Exam) The condition of the obtained oily solid cleansing cosmetic was visually inspected and evaluated according to the following evaluation criteria. ◎: Completely solidified. △: Partly not solidified. ×: Liquid and not solidified.

[0037] (Usability test) Five expert panelists scooped up each sample of the obtained oil-based solid cleansing cosmetic preparation with their fingers, applied each sample to their forearms, and evaluated the usability based on the following evaluation criteria. ◎: It feels good on the fingers and melts when applied to the skin. ○: It feels a little rough on the fingers, but when you put it on your skin you can feel it melting. △: The fingers are not smooth, but you can barely feel the melting. ×: The fingers are not smooth and there is no melting sensation.

[0038] (Stability test over time) The obtained oil-based solid cleansing cosmetic was visually inspected for its condition after one month at 50°C and in a cycle (repeated at -5°C for 8 hours, 20°C for 4 hours, 40°C for 8 hours, and 20°C for 4 hours), and evaluated according to the following criteria: "OK" indicates no change in condition, and "NG" indicates a condition that was not uniformly solidified. ◎:50℃:OK, Cycle:OK. ○: 50℃: OK, Cycle: NG. △: 50℃: NG, cycle: NG. -: Unable to evaluate (did not solidify).

[0039] (Cleaning power test) Five expert panelists applied each sample of the obtained oil-based solid cleansing cosmetics to their forearms, which had been coated with makeup cosmetics, and used it to cleanse. They then evaluated the cleansing power (ease of rinsing, presence or absence of oily film feeling) based on the following evaluation criteria. ◎: Removes makeup well and rinses off cleanly. ○: A small amount of makeup remains on the skin texture, and a slight oily film remains after rinsing. △: Makeup remains thinly overall, and a slight oily film remains after rinsing. ×: Makeup is not removed at all, and an oily film remains after rinsing.

[0040] [Table 1]

[0041] [Table 2]

[0042] [Table 3]

[0043] [Table 4]

[0044] [Table 5]

[0045] From the results of Tables 1 to 5, the oil-based solid cleansing cosmetics of Examples 1 to 19 showed good results in the condition test, usability test, stability over time test, and detergency test, and were able to be produced as oil-based solid cleansing cosmetics that could be solidified uniformly and had improved usability such as stability over time, detergency, ease of finger removal, and ease of melting during use. On the other hand, the oil-based solid cleansing cosmetics of Comparative Examples 1, 3, 4, 6, and 8 showed poor results in the condition test, the oil-based solid cleansing cosmetics of Comparative Examples 1 to 3 and 5 to 7 showed poor results in the usability test, the oil-based solid cleansing cosmetics of Comparative Examples 2, 3, and 5 showed poor results in the stability over time test, and the oil-based solid cleansing cosmetics of Comparative Examples 7 and 8 showed poor results in the detergency test, and the effects of the present invention were not achieved.

[0046] (Examples 20 to 28, Comparative Examples 9 to 14) Oil-based solid cleansing cosmetics of Examples 20 to 28 and Comparative Examples 9 to 14 were prepared under the conditions shown in Tables 6 to 8. The obtained oil-based solid cleansing cosmetics of Examples 20 to 28 and Comparative Examples 9 to 14 were subjected to the above-mentioned condition test, usability test, stability over time test, and detergency test, and the results are also shown in Tables 6 to 8.

[0047] [Table 6]

[0048] [Table 7]

[0049] [Table 8]

[0050] From the results of Tables 6 to 8, the oil-based solid cleansing cosmetics of Examples 20 to 28 showed good results in the condition test, usability test, stability over time test, and detergency test, and were able to produce oil-based solid cleansing cosmetics that could be solidified uniformly and had improved usability such as stability over time, detergency, ease of finger removability, and ease of melting during use. On the other hand, the oil-based solid cleansing cosmetics of Comparative Examples 9 to 14 showed poor results in the detergency test and could not be used as cleansing cosmetics, and did not achieve the effects of the present invention.

[0051] Below are examples of cosmetic formulations of the present invention. Oil-based solid cleansing cosmetics of Formulation Examples 1 to 8 were produced using the following blending amounts (% by mass) and production methods. In each formulation, the ingredients marked "remainder" were adjusted to make up 100% by mass. The obtained oil-based solid cleansing cosmetics were also tested for condition, usability, stability over time, and detergency using the test methods described above, and were found to be excellent in all categories of "condition," "usability," "stability over time," and "detergency."

[0052] Prescription example 1 Synthetic wax (melting point 80-85°C) 5.0% by mass Synthetic wax (melting point 95-105°C) 1.0% by mass Ethylhexyl palmitate residue Isononyl isononanoate (IOB value: 0.2) 10% by mass Hydrogenated polyisobutene 5.0% by mass PEG-20 glyceryl triisostearate (HLB: 8) 8% by mass Sorbeth-40 tetraoleate (HLB 12.5) 12% by mass Tocopherol 0.05% by mass Polyglyceryl-2 diisostearate 0.4% by mass Tanakara clay 0.5% by mass Rosa multiflora fruit extract 0.01% by mass BG 1.3% by mass

[0053] Prescription example 2 Synthetic wax (melting point 80-85°C) 4.5% by mass Synthetic wax (melting point 92-104°C) 1.0% by mass Caprylic / Caprylic Triglyceride Residue Isononyl isononanoate (IOB value: 0.2) 10% by mass (C13-15) alkane 15% by mass PEG-10 glyceryl diisostearate (HLB: 7) 10% by mass Sorbeth-40 tetraoleate (HLB 12.5) 15% by mass Tocopherol 0.05% by mass Polyhydroxystearic acid 0.05% by mass Kaolin 0.5% by mass Vaseline 0.5% by mass Artichoke leaf extract 0.1% by mass BG 1.3% by mass

[0054] Prescription example 3 Synthetic wax (melting point 75-90°C) 5.5% by mass Synthetic wax (melting point 92-104°C) 1.0% by mass Isotridecyl isononanoate residue Caprylic / Capric Triglyceride (IOB value: 0.32) 10% by mass Squalane 15% by mass PEG-5 glyceryl triisostearate (HLB: 3) 10% by mass Sorbeth-30 tetraoleate (HLB 11.5) 10% by mass Shea butter 1% by mass Tocopherol 0.05% by mass Peach kernel 0.1% by mass BG 1.3% by mass

[0055] Prescription example 4 Synthetic wax (melting point 80-85°C) 4.5% by mass Synthetic wax (melting point 95-105℃ 1.5% by mass) Hexyl laurate residue Isononyl isononanoate (IOB value: 0.32) 10% by mass Mineral oil 30% by mass PEG-15 glyceryl triisostearate (HLB: 7) 10% by mass Sorbeth-30 tetraoleate (HLB 11.5) 10% by mass Tocopherol 0.05% by mass Polyglyceryl-2 diisostearate 0.4% by mass Sea salt 0.1% by mass BG 1.3% by mass

[0056] Prescription Example 5 Synthetic wax (melting point 75-90°C) 5.0% by mass Synthetic wax (melting point 92-104°C) 1.0% by mass Isononyl isononanoate residue Caprylic / Capric Triglyceride (IOB value: 0.32) 10% by mass (C15-19) alkane 20% by mass PEG-10 glyceryl diisostearate (HLB: 7) 8% by mass Sorbeth-40 tetraoleate (HLB 12.5) 15% by mass Tocopherol 0.05% by mass Polyhydroxystearic acid 0.05% by mass Mica 0.1% by mass Shea butter 0.5% by mass Fragrance 0.1% by mass BG 1.3% by mass

[0057] Prescription Example 6 Synthetic wax (melting point 80-85°C) 4.0% by mass Synthetic wax (melting point 95-105°C) 1.5% by mass Cetyl ethylhexanoate residue Neopentyl glycol diethylhexanoate (IOB value: 0.32) 5% by mass Squalane 8% by mass (C13-15) alkane 7% by mass PEG-5 glyceryl triisostearate (HLB: 3) 10% by mass Sorbeth-30 tetraoleate (HLB 11.5) 10% by mass Tocopherol 0.05% by mass Polyhydroxystearic acid 0.05% by mass Mica 0.1% by mass Titanium oxide 0.1% by mass Bergamot fruit oil 0.1% by mass BG 1.3% by mass

[0058] Prescription Example 7 Synthetic wax (melting point 80-85°C) 4.5% by mass Synthetic wax (melting point 92-104°C) 1.0% by mass Cetyl ethylhexanoate residue Caprylic / Capric Triglyceride (IOB value: 0.32) 10% by mass (C13-15) alkane 20% by mass PEG-20 glyceryl triisostearate (HLB: 8) 15% by mass Sorbeth-30 tetraoleate (HLB 11.5) 5% by mass Tocopherol 0.05% by mass Polyglyceryl-2 diisostearate 0.4% by mass Black iron oxide 0.1% by mass BG 1.3% by mass

[0059] Prescription Example 8 Synthetic wax (melting point 75-90°C) 5.5% by mass Synthetic wax (melting point 92-104°C) 1.0% by mass Ethylhexyl palmitate residue Isononyl isononanoate (IOB value: 0.2) 15% by mass Hydrogenated polyisobutene 30% by mass PEG-10 glyceryl diisostearate (HLB: 7) 15% by mass Sorbeth-40 tetraoleate (HLB 12.5) 5% by mass Tocopherol 0.05% by mass Polyhydroxystearic acid 0.05% by mass Borosilicate (Ca / Al) 0.3% by mass BG 1.3% by mass

Claims

1. As component (A), 3.5 to 12 mass% of a solid hydrocarbon oil having a melting point of 75°C or higher and no branched chain, The component (B) comprises a component (b1) and a component (b2), the component (b1) comprising 1 to 20 mass% of a surfactant having an HLB value of 10 or more, and the component (b2) comprising 5 to 20 mass% of a surfactant having an HLB value of less than 10, As component (C), 5 to 15 mass% of a liquid oil having an IOB value of 0.2 to 0.35; As a component (D), 3 to 50 mass% of a liquid hydrocarbon oil, and is substantially free of branched-chain solid hydrocarbon oils.

2. The component (A) contains the component (a1) and the component (a2), As the component (a1), a solid hydrocarbon oil having a melting point of 75°C or more and less than 90°C; As the component (a2), a solid hydrocarbon oil having a melting point of 90°C or higher; 2. The oily solid cleansing cosmetic according to claim 1, which contains:

3. 3. The oily solid cleansing cosmetic according to claim 2, wherein the total mass of the component (a2) is greater than 0 and not greater than 6 when the total mass of the component (a1) contained in the component (A) is taken as 1.

4. The component (D) contains a volatile hydrocarbon oil which is the component (d1), 4. The oily solid cleansing cosmetic according to claim 1, wherein the mass of component (d1) in component (D) is 0.1 or more when the total mass of component (D) is 1.

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