Cleansing cosmetics

Abstract

To provide cleansing cosmetics that contain squalane as a base while demonstrating superior cleansing power and transparency.SOLUTION: The foregoing problem is solved by cleansing cosmetics and the like, containing squalane, jojoba seed oil, ester oil, silicone oil, which is methylphenyl polysiloxane with a phenyl group and a trimethyl siloxy group, a nonionic surfactant, which is polyoxyethylene sorbit fatty acid ester with four or more ester bonds (excluding tetraoleate sorbeth-40), and water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cleansing cosmetic, which is a solvent-based skin care cosmetic, used for the purpose of removing cosmetics and dirt from the skin. [Background technology]

[0002] Skin cleansers that remove oily dirt such as makeup cosmetics and skin stains are desired to have both good cleansing power (cleansing power) and a pleasant feel after cleansing. An example of a skin cleanser is a liquid cleansing oil. Generally, cleansing oils are known to have excellent cleansing power among skin cleansers that remove makeup stains. However, cleansing oils tend to wash away excessive sebum from the skin, which can dry out the skin after use.

[0003] Therefore, it is conceivable to use an oil that is also used as a moisturizing ingredient as the base of a cleansing oil. One such oil is squalane. Squalane is a colorless, transparent oil obtained by hydrogenating squalene, which is obtained from shark liver oil. Squalene is also found in wheat germ oil and human sebum, and is known as a cholesterol precursor. Squalane is chemically stable, has a less oily feel than liquid paraffin, which is also a hydrocarbon, and has an excellent texture, making it a representative, high-quality oil. Squalane is virtually non-irritating to the skin and has excellent emollient properties, making it particularly useful as an ingredient in high-end cosmetics (see, for example, Non-Patent Document 1).

[0004] Known examples of cleansing oils containing squalane as a base include scalp cleansing oil cosmetics containing squalane, caprylic / capric triglyceride, jojoba seed oil, and sorbeth-40 tetraoleate (see Patent Document 1).

[0005] On the other hand, petroleum-derived oils are commonly used as bases for skin cleansers. Liquid paraffin is one example of such oils. Known skin cleansers containing liquid paraffin as a base include a transparent liquid skin cleanser containing liquid paraffin (27.54% by mass to 27.587% by mass), isononyl isononanoate, methylphenylpolysiloxane (5.00% by mass), jojoba oil, polyoxyethylene sorbitan tetraoleate (40EO) (14.00% by mass), and purified water (see Patent Document 2). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-089869 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-256474 [Non-patent literature]

[0007] [Non-Patent Document 1] Cosmetic Ingredient Dictionary 2012, 6th Edition, published August 31, 2012, pages 30-31 Summary of the Invention [Problem to be solved by the invention]

[0008] Cleansing cosmetics used for the purpose of removing cosmetics and dirt from the skin are desirably transparent to promote a feeling of cleanliness in addition to cleansing power and a pleasant feeling in use. It is unclear whether the scalp cleansing oil cosmetic described in Patent Document 1 is transparent, and according to the inventors' investigation, a transparent cleansing cosmetic cannot be obtained by simply combining squalane and a nonionic surfactant.

[0009] The liquid transparent skin cosmetic described in Patent Document 2 uses liquid paraffin as a base. As described in Non-Patent Document 1, petroleum-derived liquid paraffin has a stronger oily feel and a poorer texture than naturally-derived squalane. Furthermore, the liquid transparent skin cosmetic described in Patent Document 2 contains a smaller amount of liquid paraffin relative to the nonionic surfactant polyoxyethylene sorbit tetraoleate (40EO). As a result, the liquid transparent skin cosmetic described in Patent Document 2 has poor cleansing power and may be subject to significant irritation from the nonionic surfactant.

[0010] Furthermore, few cleansing cosmetics have been known to date that contain squalane as a base, which provides an excellent feeling when used, while also exhibiting good cleansing power and transparency.

[0011] Therefore, an object of the present invention is to provide a cleansing cosmetic that contains squalane as a base but has good cleansing power and transparency. [Means for solving the problem]

[0012] The present inventors have conducted extensive research to solve the above-mentioned problems, and have succeeded in preparing a cleansing cosmetic composition that has an excellent emollient effect and provides a moist feeling to the skin after cleansing by using squalane as a base and jojoba seed oil in addition. However, it has been difficult to obtain a transparent cosmetic composition that contains these ingredients.

[0013] Therefore, the inventors further repeated trial and error and found that when a nonionic surfactant was used to increase the compatibility of the ingredients, a transparent cleansing cosmetic was obtained in some cases but not in other cases. Furthermore, even if the obtained cleansing cosmetic was highly transparent, separation, clouding, solidification, etc. were observed depending on the storage conditions.

[0014] Based on the above findings, the present inventors further investigated and found that by combining squalane and jojoba seed oil with ester oil and water, and further with a specific nonionic surfactant and a specific silicone oil, they succeeded in obtaining a cleansing cosmetic composition that had high cleansing power and was transparent. Moreover, surprisingly, the obtained cleansing cosmetic composition had excellent stability over time.

[0015] Based on these findings, the present inventors have succeeded in creating a cleansing cosmetic composition that contains squalane, jojoba seed oil, ester oil, water, a specific nonionic surfactant, and a specific silicone oil, in order to solve the problems of the present invention. The present invention was completed based on these findings and successful examples.

[0016] Therefore, as one aspect of the present invention, the following embodiments are provided. [1] (A) Squalane, (B) jojoba seed oil; (C) an ester oil; (D) a silicone oil which is a methylphenylpolysiloxane having a phenyl group and a trimethylsiloxy group; (E) a nonionic surfactant which is a polyoxyethylene sorbitan fatty acid ester having four or more ester bonds (excluding sorbeth-40 tetraoleate); (F) Water and A cleansing cosmetic comprising: [2] The cleansing cosmetic according to [1], wherein the content of the component (D) is 15% by mass to 30% by mass. [3] The cleansing cosmetic according to [1], wherein the ratio of the content of the component (A) to the content of the component (D) ((A) / (D)) is 0.5 to 5.0, and / or the ratio of the content of the component (A) to the content of the component (E) ((A) / (E)) is 5 to 40. [4] The cleansing cosmetic according to [1], wherein the content of the component (A) is 29% by mass to 60% by mass. [5] The cleansing cosmetic according to [1], wherein the total content of the components (A) to (F) is 80% by mass to 90% by mass. [6] The cleansing cosmetic according to any one of [1] to [5], wherein the component (D) is at least one selected from the group consisting of diphenylsiloxyphenyl trimethicone and phenyl trimethicone. [7] The cleansing cosmetic according to any one of [1] to [5], wherein the component (E) is at least one selected from the group consisting of sorbeth tetraoleate and sorbeth pentaoleate. [8] Squalane having a content of 29% by mass to 60% by mass, Jojoba seed oil having a content of 1% by mass to 15% by mass; An ester oil having a content of 1% by mass to 40% by mass; a silicone oil that is a methylphenylpolysiloxane having a phenyl group and a trimethylsiloxy group, with a content of 12% by mass to 35% by mass; a nonionic surfactant that is a polyoxyethylene sorbitan fatty acid ester having four or more ester bonds, the content of which is 0.5% by mass to 10% by mass (excluding sorbitan tetraoleate-40); Water content of 0.8% to 2.3% by mass A cleansing cosmetic comprising: [Effects of the Invention]

[0017] According to the present invention, a cleansing cosmetic having good cleansing power and transparency can be provided by using squalane, which has a strong cleansing power and a high emollient effect, as a base, and further containing jojoba seed oil, which has a strong emollient effect, and by containing ester oil, water, a specified nonionic surfactant, and a specified silicone oil.The cleansing cosmetic of one embodiment of the present invention contains squalane, jojoba seed oil, ester oil, silicone oil, and other oils with cleansing effects, and is expected to be used daily to remove oily dirt, such as makeup cosmetics and skin dirt, from the skin with a good feel when used.

[0018] Furthermore, the cleansing cosmetic composition of one aspect of the present invention has excellent stability, allowing it to be used and stored for a long period of time. Furthermore, the cleansing cosmetic composition of one aspect of the present invention can be produced without complex processes, allowing it to be produced on an industrial scale. DETAILED DESCRIPTION OF THE INVENTION

[0019] Each aspect 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.

[0020] 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 inventors' knowledge and experience to date, and therefore the technical scope of the present invention is not limited solely by such theories and speculations.

[0021] "And / or" means any one or any or all combinations of two or more of the associated listed items. "Content" is synonymous with concentration and refers to the ratio of the amount of a component to the total amount of the cleansing cosmetic. However, the total content 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 may also be the amount of the commercially available product itself. In this specification, the term "to" in a numerical range means a range that includes the preceding and following numerical values; for example, "0% by mass to 100% by mass" means a range that is equal to or greater than 0% by mass and equal to or less than 100% by mass. "Exceeding" and "less than" mean a lower limit and an upper limit, respectively, that do not include the preceding numerical value; for example, "exceeding 1" means a numerical value greater than 1, and "less than 100" means a numerical value less than 100. "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 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 in a decimal value matches the number of significant digits. For example, 0.1 has one significant digit, and 0.10 has two significant digits.

[0022] The cleansing cosmetic of one embodiment of the present invention contains squalane (component (A)), jojoba seed oil (component (B)), ester oil (component (C)), a specified silicone oil (component (D)), a specified nonionic surfactant (component (E)), and water (component (F)).

[0023] As is commonly known, squalane, component (A), is a hydrogenated product of squalene. Squalane functions to impart various effects to cleansing cosmetics, including an emollient effect that reduces moisture loss from the skin, maintains moisture, and softens the skin; a moisturizing effect that maintains skin moisture by replenishing skin moisture and preventing moisture evaporation; and a cleansing effect that dissolves and removes oily dirt. Component (A) can be obtained by hydrogenating squalene contained in natural oils such as shark liver oil and vegetable oil, by fermenting sugarcane extract, or by other known methods. Component (A) may be commercially available.

[0024] The content of component (A) is not particularly limited as long as it is an amount that can exert the effect expected of squalane, but for example, if it is desired to impart a moist feeling to the skin after cleansing with a cleansing cosmetic, the content is preferably 25% to 70% by mass, more preferably 29% to 60% by mass, and even more preferably 30% to 55% by mass. The content of component (A) is preferably the largest amount among the blended components, since it is used as a base for the cleansing cosmetic.

[0025] As is commonly known, component (B) jojoba seed oil is extracted from jojoba ( Simmondsia chinensis Component (B) is a liquid wax obtained from the seeds of jojoba (Jojoba). Component (B), like component (A), functions to impart emollient, moisturizing, and cleansing properties to the cleansing cosmetic. Component (B) can be obtained by squeezing or extracting jojoba seeds. Component (B) may be commercially available.

[0026] The content of component (B) is not particularly limited as long as it is an amount that can exert the effect expected of jojoba seed oil, but for example, if it is desired to impart a moist feeling to the skin after washing with a cleansing cosmetic, the content is preferably 0.1% by mass to 20% by mass, more preferably 1% by mass to 15% by mass, and even more preferably 3% by mass to 12% by mass.

[0027] As is commonly known, the ester oil of component (C) is a synthetic oil synthesized from a fatty acid and an alcohol. The cleansing cosmetic of one embodiment of the present invention contains component (C), which improves the miscibility between the components and improves the transparency after preparation, making it possible to produce a cosmetic with excellent transparency. In addition to the aforementioned function, component (C) also functions to impart a cleansing effect to the cleansing cosmetic.

[0028] Component (C) is not particularly limited as long as it can be expected to achieve the above-mentioned effect. Examples include cetyl ethylhexanoate, triethylhexanoin, isononyl isononanoate, diethyl sebacate, diisopropyl adipate, myristyl myristate, isopropyl palmitate, ethylhexyl palmitate, isopropyl myristate, and tri(caprylic / capric)glyceryl. However, cetyl ethylhexanoin, triethylhexanoin, and isononyl isononanoate are preferred because they have relatively low viscosity at room temperature and therefore good compatibility with squalane and other components. Component (C) may be one of the above compounds alone or a combination of two or more. Component (C) may be obtained by synthesis using a known method or may be commercially available.

[0029] The content of component (C) is not particularly limited as long as it is an amount that allows the ester oil to exert its expected effect. For example, from the viewpoint of the transparency of the cleansing cosmetic preparation containing the ester oil, the content is preferably 0.1% by mass to 50% by mass, more preferably 1% by mass to 40% by mass, and even more preferably 3% by mass to 35% by mass.

[0030] Component (D) is a silicone oil that is a methylphenylpolysiloxane having a phenyl group and a trimethylsiloxy group. Of these, a structure in which a phenyl group and a trimethylsiloxy group are bonded to the same silicon atom is preferred.

[0031] The cleansing cosmetic of one embodiment of the present invention can be a cosmetic with excellent transparency because the inclusion of component (D) improves the miscibility between the components and improves the transparency after preparation. Furthermore, the cleansing cosmetic of one embodiment of the present invention can be a cosmetic with excellent stability over time because the inclusion of component (D) allows the components to remain uniformly dissolved during storage. Furthermore, in addition to the above function, component (D) also functions to impart an effect such as a cleansing action to the cleansing cosmetic.

[0032] Component (D) is not particularly limited as long as it can be expected to achieve the above-mentioned effect, and examples thereof include diphenylsiloxyphenyl trimethicone, phenyl trimethicone, trimethylsiloxyphenyl dimethicone, and aminopropylphenyl trimethicone. However, diphenylsiloxyphenyl trimethicone and phenyl trimethicone are preferred because they have relatively low viscosity at room temperature and therefore good compatibility with squalane and other components. Component (D) may be one of the above-mentioned compounds alone, or a combination of two or more. Component (D) may be obtained by synthesis using a known method, or may be commercially available.

[0033] The content of component (D) is not particularly limited as long as it is an amount that allows component (D) to exert its expected effect. For example, from the viewpoint of the transparency and stability over time of the cleansing cosmetic composition due to component (D), the content is preferably more than 10% by mass and not more than 40% by mass, more preferably 12% to 35% by mass, and even more preferably 15% to 30% by mass.

[0034] From the viewpoint of the transparency of the cleansing cosmetic, it is preferable that the content of component (D) has a certain relationship with the content of component (A). That is, it is preferable that component (D) is contained in a certain amount or more relative to component (A). From this viewpoint, the ratio of the content of component (A) to the content of component (D) ((A) / (D)) is, for example, preferably less than 5.4, more preferably 0.5 to 5.0, and even more preferably 1.0 to 3.5.

[0035] According to the inventors' investigation of silicone oil, it was found that when diphenyldimethicone, dimethicone, or cyclopentasiloxane is used instead of component (D), the transparency or stability over time of the resulting cleansing cosmetic tends to be impaired. Therefore, even when the cleansing cosmetic of one embodiment of the present invention contains diphenyldimethicone, dimethicone, and cyclopentasiloxane, the total content of these is preferably less than the content of component (D), more preferably less than 10% by mass, even more preferably less than 1% by mass, and even more preferably 0.1% by mass or less.

[0036] The nonionic surfactant of component (E), which is a polyoxyethylene sorbite fatty acid ester having four or more ester bonds, is a nonionic surfactant that is formed by ester bonds between a tetrahydric or higher polyhydric alcohol having an etherified portion and a fatty acid, and that exhibits surface-active properties.

[0037] The cleansing cosmetic of one embodiment of the present invention contains component (E), which allows the components to remain uniformly dissolved during storage, making it a cosmetic with excellent stability over time. In addition to this function, component (E) also exhibits a surfactant effect that enhances the compatibility of the components in the cleansing cosmetic.

[0038] Component (E) is not particularly limited as long as it can be expected to have the above-mentioned effect, and examples thereof include polyoxyethylene sorbite fatty acid esters to which multiple moles of ethylene oxide are added and in which the fatty acid is selected from oleic acid, stearic acid, isostearic acid, and lauric acid. The number of moles of ethylene oxide added is not limited, and examples include 6 moles, 30 moles, 40 moles, and 60 moles. However, in any case, sorbeth-40 tetraoleate is excluded from component (E).

[0039] Component (E) has a bulky structure due to the presence of a tetrahydric or higher polyhydric alcohol as a structural unit, which is presumably responsible for the improved stability over time of the cleansing cosmetic. Furthermore, since component (E) tends to improve the stability over time of the cleansing cosmetic, the hydrophilic-lipophilic balance (HLB) of component (E) is preferably 8 to 14, more preferably 8.5 to 12, and even more preferably 9 to 10.5. From these perspectives, component (E) is preferably, for example, sorbeth-30 tetraoleate, sorbeth-40 pentaoleate, sorbeth-6 tetraoleate, sorbeth-60 tetraoleate, or sorbeth-60 tetrastearate, with sorbeth-30 tetraoleate and sorbeth-40 pentaoleate being more preferred from the perspective of the stability over time of the cleansing cosmetic. Component (E) may be one of the above or a combination of two or more of the above. Component (E) may be obtained by synthesis using a known method, or may be a commercially available product.

[0040] The content of component (E) is not particularly limited as long as it is an amount that can exert the expected effect of component (E); for example, from the viewpoint of the stability over time of the cleansing cosmetic, it is preferably 0.1% by mass to 20% by mass, more preferably 0.5% by mass to 10% by mass, and even more preferably 1% by mass to 5% by mass.

[0041] From the viewpoint of the stability over time of the cleansing cosmetic, it is preferable that the content of component (E) has a certain relationship with the content of component (A). From this viewpoint, the ratio of the content of component (A) to the content of component (E) ((A) / (E)) is, for example, preferably 3 to 50, more preferably 5 to 40, and even more preferably 10 to 30.

[0042] The inventors' investigations into nonionic surfactants have revealed that when component (E) is replaced with PEG-10 isostearate, PEG-30 glyceryl trioleate, or PEG-40 glyceryl trioleate, which are polyhydric alcohol fatty acid esters obtained by esterifying a trihydric or lower polyhydric alcohol with a fatty acid, the temporal stability of the resulting cleansing cosmetic tends to be impaired. Thus, even when the cleansing cosmetic of one embodiment of the present invention contains PEG-10 isostearate, PEG-30 glyceryl trioleate, and PEG-40 glyceryl trioleate, the total content of these is preferably less than the content of component (E), more preferably 1% by mass or less, and even more preferably 0.1% by mass or less.

[0043] The water of component (F) may be any water that is normally used to prepare cosmetics, and examples thereof include tap water, distilled water, purified water, and ion-exchanged water, but are not limited to these.

[0044] Component (F) acts to prevent the cleansing cosmetic from solidifying at low temperatures. On the other hand, if component (F) is present in excess, the transparency of the cleansing cosmetic tends to be impaired. Therefore, the content of component (F) is not particularly limited as long as it is an amount that prevents the cleansing cosmetic from solidifying at low temperatures without impairing transparency. From these viewpoints, for example, it is preferably more than 0.5% by mass and less than 2.5% by mass, more preferably 0.8% to 2.3% by mass, and even more preferably 1.0% to 2.0% by mass.

[0045] In order for the cleansing cosmetic composition of one embodiment of the present invention to have both transparency and stability over time, the total content of components (A) to (F) is preferably 75% by mass to 95% by mass, and more preferably 80% by mass to 90% by mass.

[0046] The cleansing cosmetic composition of one embodiment of the present invention may contain other ingredients in addition to the components (A) to (F), as long as the object of the present invention can be achieved.

[0047] The other components are not particularly limited, and examples thereof include components commonly used in cleansing cosmetics, such as oils, surfactants, moisturizers, stabilizers, fragrances, antioxidants, chelating agents, cosmetic ingredients, preservatives, pH adjusters, cooling agents, thickeners, and coloring materials. 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 limited thereto.

[0048] The oils are oils other than components (A) to (D), and examples thereof include oils used as oil-based emollient components and cleansing components. Specific examples include vegetable oils such as rosa canina fruit oil, grape seed oil, argania spinosa kernel oil, coconut oil, palm oil, palm kernel oil, safflower oil, olive fruit oil, castor oil, avocado oil, sesame oil, tea seed oil, evening primrose oil, wheat germ oil, macadamia nut seed oil, hazelnut seed oil, kukui nut oil, rose hip oil, wild rose oil, meadowfoam oil, persic oil, tea tree oil, peppermint oil, corn oil, rapeseed oil, sunflower oil, linseed oil, cottonseed oil, soybean oil, peanut oil, rice bran oil, rice germ oil, cacao butter, shea butter, hydrogenated coconut oil, and hydrogenated castor oil; polyisobutene, paraffin, polyolefin, etc. Examples of oils include linear and branched hydrocarbon oils such as propylene glycol, propylene glycol, and isoparaffin; higher fatty acids such as stearic acid, isostearic acid, behenic acid, undecylenic acid, palmitoleic acid, oleic acid, linoleic acid, linolenic acid, erucic acid, docosahexaenoic acid, eicosapentaenoic acid, isohexadecanoic acid, anteisohenicosanoic acid, and long-chain branched fatty acids; and higher alcohols such as cetyl alcohol, octyldodecanol, oleyl alcohol, stearyl alcohol, isostearyl alcohol, cetearyl alcohol, cetostearyl alcohol, behenyl alcohol, hexyldecanol, 2-decyltetradecynol, and monooleyl glyceryl ether (selachyl alcohol). These may be used alone or in combination of two or more. The content of the oil is preferably 1% to 20% by mass.

[0049] The total content of the oil components consisting of components (A) to (D) and the oil agent in the cleansing cosmetic of one embodiment of the present invention is preferably 75% to 95% by mass, and more preferably 80% to 90% by mass, from the viewpoint of being able to impart good cleansing power and emollient effect to the cleansing cosmetic.

[0050] Examples of surfactants include surfactants used as cleansing ingredients other than component (D), specifically polyethylene glycol fatty acid esters such as PEG-8 diisostearate, PEG-12 diisostearate, PEG-150 distearate, PEG-10 laurate, PEG-10 stearate, PEG-25 stearate, PEG-40 stearate, PEG-45 stearate, PEG-55 stearate, and PEG-10 oleate; fatty acid amides such as palm kernel fatty acid amide DEA; and Glycerin fatty acid esters such as glyceryl stearate (SE); polyglycerin fatty acid esters such as polyglyceryl-6 laurate, polyglyceryl-10 myristate, polyglyceryl-10 stearate, and polyglyceryl-10 isostearate; polyoxyethylene glycerin fatty acid esters such as PEG-5 glyceryl stearate, PEG-15 glyceryl stearate, PEG-15 glyceryl isostearate, PEG-20 glyceryl triisostearate, and PEG-5 glyceryl oleate; coconut Sorbitan fatty acid esters such as sorbitan fatty acid, sorbitan oleate, sorbitan sesquioleate, and sorbitan palmitate; polyoxyethylene sorbitan fatty acid esters such as polysorbate 40, polysorbate 60, polysorbate 80, and PEG-20 sorbitan isostearate; polyoxyethylene hydrogenated castor oils such as PEG-20 hydrogenated castor oil, PEG-30 hydrogenated castor oil, PEG-60 hydrogenated castor oil, and PEG-50 hydrogenated castor oil triisostearate; polyoxyethylene cetyl ether (cetyl ether); Examples of the emulsifier include polyoxyethylene alkyl ethers such as PPG-4 ceteth-1, PPG-8 ceteth-20, PPG-6 decyltetradeceth-12, and PPG-6 decyltetradeceth-20; and lecithin derivatives such as hydrogenated lecithin and hydrogenated lysolecithin. These may be used alone or in combination of two or more. The content of the emulsifier is preferably 0% to 15% by mass.

[0051] Examples of moisturizing agents include glycerin, butylene glycol (BG), propylene glycol (PG), diglycerin, dipropylene glycol (DPG), methyl gluceth-10, methyl gluceth-20, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, hyaluronic acid and its salts and derivatives, polyquaternium, trehalose, xylitol, maltitol, maltose, sorbitol, glucose, fructose, hydrolyzed elastin, sodium lactate, cyclodextrin, and pyrrolidone carboxylic acid, which can be used alone or in combination of two or more. The content of the moisturizing agent is preferably 0% to 5% by mass.

[0052] Examples of stabilizers include ethanol, ascorbic acid, sodium ascorbate, erythorbic acid, citric acid, and sodium edetate, and these can be used alone or in combination of two or more. The content of the stabilizer is preferably 0% by mass to 5% by mass.

[0053] The fragrance may be a commercially available product or an essential oil. Examples include wild rose oil, pelargonium graveolens oil, palmarosa oil, peppermint oil, Roman chamomile flower oil, and tea tree leaf oil. These may be used alone or in combination of two or more. The content of the fragrance is preferably 0% to 1% by mass.

[0054] Examples of antioxidants include vitamin E and its derivatives such as dibutylhydroxytoluene (BHT), butylhydroxyanisole (BHA), and 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% to 1% by mass.

[0055] Examples of chelating agents include alanine, disodium edetate (EDTA-2Na), sodium polyphosphate, sodium metaphosphate, sodium phytate, trisodium phosphate, and sodium gluconate, and these can be used alone or in combination of two or more. The content of the chelating agent is preferably about 0% by mass to 0.1% by mass.

[0056] Examples of cosmetic ingredients include apple tannin (apple fruit extract), licorice root extract, resveratrol, tuberose polysaccharide, citrus citrus fruit juice, tangerine peel extract, areca catechu extract, marjoram leaf extract, bean berry extract, morus alba root bark extract, hydrolyzed rice extract, hydrolyzed rice bran extract, soy milk fermented liquor, bilberry leaf extract, and dipotassium glycyrrhizinate, and these can be used alone or in combination of two or more. The content of the cosmetic ingredient is preferably 0% to 1% by mass.

[0057] Examples of preservatives include parahydroxybenzoates (methylparaben, propylparaben, etc.) and their sodium salts, phenoxyethanol, benzoic acid, benzoates, salicylic acid, salicylates, sorbic acid and its salts, chlorphenesin, hinokitiol, isopropylmethylphenol, parachlorophenol, benzalkonium chloride, chlorhexidine hydrochloride, trichlorocarbanilide, photosensitizers, etc. These 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.

[0058] The cleansing cosmetic composition of one embodiment of the present invention is not particularly limited in function and / or effect, as long as it is used as a cleansing cosmetic composition. The cleansing cosmetic composition of one embodiment of the present invention preferably has good cleansing power, transparency, and stability over time.

[0059] The cleansing power of the cleansing cosmetic of one aspect of the present invention is preferably such that it can be evaluated as "good" by, for example, the method described in the Examples below, whereby no makeup cosmetic remains on the skin surface or in the skin grooves after cleansing.

[0060] The transparency of the cleansing cosmetic composition of one embodiment of the present invention is preferably such that, when the composition is left to stand at 20°C for at least 24 hours, for example, by the method described in the Examples below, and then shaken and stirred in the container again to make it homogenous, and then left to stand with a white paper background with a black line drawn on it, the composition is clear and transparent, and the black line in the background is visible, so that the composition is rated as "Good."

[0061] The stability over time of the cleansing cosmetic composition of one embodiment of the present invention is preferably such that, when stored at 50°C or at 50°C and 5°C for one month, for example, according to the method described in the Examples below, no separation, white turbidity, and / or solidification is observed, resulting in an evaluation of "Good."

[0062] The feel upon use of the cleansing cosmetic of one embodiment of the present invention is not particularly limited, but for example, in a sensory evaluation described in the Examples below, it is preferable that the average scores for the five categories of "absence of friction," "good spreadability," "absence of stickiness," "absence of sliminess," and "absence of dryness" are all at a level of 3 or higher, it is more preferable that the average score for at least one of these categories is 4 or higher, and it is even more preferable that the average scores for two or more or three or more of these categories are 4 or higher.

[0063] A specific embodiment of the cleansing cosmetic of one aspect of the present invention is a cleansing cosmetic comprising 25% by mass to 70% by mass of component (A), 0.1% by mass to 20% by mass of component (B), 0.1% by mass to 50% by mass of component (C), more than 10% by mass and not more than 40% by mass of component (D), 0.1% by mass to 20% by mass of component (E), and more than 0.5% by mass and less than 2.5% by mass of component (F).

[0064] Another specific embodiment of the cleansing cosmetic according to one embodiment of the present invention is a cleansing cosmetic comprising 29% by mass to 60% by mass of component (A), 1% by mass to 15% by mass of component (B), 1% by mass to 40% by mass of component (C), 12% by mass to 35% by mass of component (D), 0.5% by mass to 10% by mass of component (E), and 0.8% by mass to 2.3% by mass of component (F).

[0065] Another specific embodiment of the cleansing cosmetic according to one embodiment of the present invention is a cleansing cosmetic comprising 30% by mass to 55% by mass of component (A), 3% by mass to 12% by mass of component (B), 3% by mass to 35% by mass of component (C), 15% by mass to 30% by mass of component (D), 1% by mass to 5% by mass of component (E), and 1.0% by mass to 2.0% by mass of component (F).

[0066] In a specific embodiment of the cleansing cosmetic according to one aspect of the present invention described above, the ratio of the content of component (A) to the content of component (D) ((A) / (D)) is preferably less than 5.4, 0.5 to 5.0, or 1.0 to 3.5; the ratio of the content of component (A) to the content of component (E) ((A) / (E)) is preferably 3 to 50, 5 to 40, or 10 to 30; and / or the total content of components (A) to (F) is preferably 75% by mass to 95% by mass or 80% by mass to 90% by mass.

[0067] The method for producing the cleansing cosmetic composition of one embodiment of the present invention is not particularly limited, and it can be produced by, for example, mixing components (A) to (F) and any other components to a uniform consistency. If any of the other components are solidified, it is preferable to heat them to dissolve them in advance. The temperature at which they are heated is not particularly limited, but is, for example, 65°C to 85°C.

[0068] The cleansing cosmetic of one embodiment of the present invention is not particularly limited in its mode of use or formulation, and can be used, for example, as a cleansing oil. The cleansing cosmetic of one embodiment of the present invention may also be used as a cleansing gel by using a thickener. The cleansing cosmetic of one embodiment of the present invention can be impregnated into a sheet or sprayed. Therefore, the cleansing cosmetic of one embodiment of the present invention can be in the form of an impregnated sheet, a pump spray, or the like.

[0069] The cleansing cosmetic of one embodiment of the present invention can be used to remove oily dirt such as makeup cosmetics and skin dirt. The method of using the cleansing cosmetic of one embodiment of the present invention is not particularly limited, and a method may be appropriately selected depending on the mode of use and formulation. For example, when the cleansing cosmetic of one embodiment of the present invention is a cleansing oil, an appropriate amount is taken in the hand, applied to the face, and thoroughly blended into the makeup cosmetics or skin, and then rinsed with running water to remove the oily dirt on the skin together with the cleansing oil. Furthermore, it is expected that the skin will be moisturized and retain moisture after using the cleansing cosmetic of one embodiment of the present invention.

[0070] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to these examples and can take various forms as long as the object of the present invention can be achieved. The values ​​in the tables represent mass % (%(w / w)). [Example]

[0071] [Example 1. Sensory evaluation of squalane-containing cleansing cosmetics] (1-1) Preparation of cleansing cosmetics The components shown in Table 1 were placed in a beaker in the following order. The components in the beaker were manually stirred at room temperature to prepare a cleansing cosmetic. However, PEG-12 diisostearate in the table was previously dissolved by heating in a water bath at 80°C.

[0072] (1-2) Sensory evaluation method Five trained panelists applied the cleansing cosmetics directly to their faces and were asked to rate them on a 5-point scale (5 being the highest and 1 being the lowest) for "freedom of friction" (when applying and spreading the cleansing cosmetics on the face, no feeling of resistance between the face and fingers), "good spreadability" (when applying and spreading the cosmetics on the face, the cosmetics can be spread smoothly without the need for significant force), "freedom of stickiness" (after rinsing off the cosmetics from the face, no feeling of stickiness between the face and fingers), "freedom of stickiness" (after rinsing off the cosmetics from the face, no feeling of residual oiliness as if the cosmetics' oily components remain on the skin), and "freedom of dryness" (after rinsing off the cosmetics from the face and wiping off the moisture, no feeling of excessive oil being washed away from the skin). The panelists were then given scores and standard deviations.

[0073] (1-3) Sensory evaluation results The results of the sensory evaluation are shown in Table 1. As shown in Table 1, the cleansing cosmetic of Example 1, which used squalane as the hydrocarbon oil, was superior in "freedom from friction," "good spreadability," "freedom from stickiness," and "freedom from dryness" compared to the cleansing cosmetics of Reference Examples 1 and 2, which used mineral oil and olefin oligomer. Furthermore, the cleansing cosmetic of Example 1 was comparable to or superior to the cleansing cosmetics of Reference Examples 1 and 2 in "freedom from stickiness."

[0074] Taking the above results together, it was found that cleansing cosmetics using squalane as the hydrocarbon oil are cleansing cosmetics that provide a superior feel when used compared to cleansing cosmetics using other hydrocarbon oils.

[0075] [Table 1]

[0076] [Example 2. Evaluation of the physical properties of cleansing cosmetics] (2-1) Preparation of cleansing cosmetics In the same manner as in (1-1) above, cleansing cosmetics were prepared using the components shown in Tables 2 and 3.

[0077] (2-2) Transparency The cleansing cosmetic sample was placed in a standard glass bottle (7K bottle), left to stand at 20°C for at least 24 hours, and then shaken and stirred again until homogenous. When the stirred container was left to stand with a white piece of paper with a black line drawn on it as a background, if the solution was clear and transparent and the black line was visible, it was evaluated as "Good", and if the solution was cloudy and the black line was not visible, it was evaluated as "Poor".

[0078] (2-3) Stability over time The cleansing cosmetic samples after trial manufacture were placed in standard glass bottles (7K bottles) and stored at 50°C as harsh test conditions. Every week for one month, the presence or absence of separation was visually checked immediately after removal. The samples were then left to stand at 20°C for 24 hours or more, and then stirred to check for the occurrence of white turbidity. A case in which there was no separation and no white turbidity was evaluated as "Good," and a case in which separation and / or white turbidity was observed was evaluated as "Poor." Furthermore, for the samples stored at 5°C, in addition to the same evaluation method as for the 20°C samples, the samples were visually inspected immediately after removal from the 5°C thermostatic chamber. A case in which no solidified cleansing cosmetic was observed at the bottom of the bottle was evaluated as "Good," and a case in which solidified cleansing cosmetic was observed was evaluated as "Poor."

[0079] (2-4) Cleansing power A rice-grain-sized amount of commercially available makeup (foundation or lipstick) was evenly applied to the inside of the forearm to cover an area of ​​1.5 cm in diameter, and then 20 μL of cleansing cosmetic was dropped onto the skin and massaged in with a finger for 15 seconds. The skin was then rinsed with running water for 30 seconds, and the skin condition before and after cleansing was observed under a microscope at 50x magnification. If no makeup cosmetic remained on the skin surface or in the skin grooves after cleansing, the result was evaluated as "Good," and if it did, the result was evaluated as "Poor."

[0080] (2-5) Evaluation results The evaluation results of the cleansing cosmetics are shown in Tables 2 and 3.

[0081] As shown in Table 2, the cleansing cosmetics containing jojoba seed oil, ester oil, water, a specific silicone oil, and a specific nonionic surfactant in addition to squalane generally had excellent transparency, stability over time, and cleansing power.

[0082] In contrast, as shown in Table 3, cleansing cosmetics that contained squalane but did not contain ester oil, specific silicone oil, or specific nonionic surfactant were inferior in transparency or stability over time. Also, cleansing cosmetics with an insufficient content of specific silicone oil or an excessive content of water were inferior in transparency. Furthermore, cleansing cosmetics that did not contain water or had an insufficient water content solidified at the bottom of the container when stored at low temperatures.

[0083] On the other hand, as shown in Table 3, the cleansing cosmetics of Reference Examples 3 and 4, which used mineral oil instead of squalane, did not suffer from any effect on transparency, stability over time, or cleansing power, even though they did not contain ester oil or specific silicone oil.

[0084] As described above, when squalane is used as the base of a cleansing cosmetic, it has been found that by combining jojoba seed oil, ester oil, water, a specific silicone oil, and a specific nonionic surfactant, a cleansing cosmetic with excellent transparency, stability over time, and cleansing power can be obtained.

[0085] [Table 2]

[0086] [Table 3] [Industrial Applicability]

[0087] The cleansing cosmetic of one embodiment of the present invention has a base of squalane, which has both cleansing power and a high emollient effect, and further contains jojoba seed oil, which has a high emollient effect. However, since the cleansing cosmetic also contains ester oil, water, a specified nonionic surfactant, and a specified silicone oil, it has good cleansing power and transparency, and can be used as skin care cosmetics such as cleansing oil, impregnated sheets, and sprays to remove oily stains on the skin, including makeup cosmetics and skin dirt.

Claims

1. (A) squalane, (B) jojoba seed oil; (C) an ester oil; (D) a silicone oil which is a methylphenylpolysiloxane having a phenyl group and a trimethylsiloxy group; (E) a nonionic surfactant which is a polyoxyethylene sorbitol fatty acid ester having four or more ester bonds (excluding sorbeth-40 tetraoleate); (F) Water and Including, The content of the component (D) is more than 10% by mass and not more than 40% by mass, The component (D) is at least one selected from the group consisting of diphenylsiloxyphenyl trimethicone and phenyl trimethicone, and The cleansing cosmetic contains the component (F) in an amount of 0.8% by mass to 2.3% by mass.

2. 2. The cleansing cosmetic preparation according to claim 1, wherein the ratio of the content of said component (A) to the content of said component (D) ((A) / (D)) is 0.5 to 5.0, and / or the ratio of the content of said component (A) to the content of said component (E) ((A) / (E)) is 5 to 40.

3. 2. The cleansing cosmetic according to claim 1, wherein the content of the component (A) is 29% by mass to 60% by mass.

4. 2. The cleansing cosmetic according to claim 1, wherein the total content of the components (A) to (F) is 80% by mass to 90% by mass.

5. The cleansing cosmetic according to any one of claims 1 to 4, wherein the component (E) is at least one selected from the group consisting of sorbeth tetraoleate and sorbeth pentaoleate.

6. Squalane having a content of 29% by mass to 60% by mass; Jojoba seed oil having a content of 1% by mass to 15% by mass; An ester oil having a content of 1% by mass to 40% by mass; a silicone oil that is a methylphenylpolysiloxane having a phenyl group and a trimethylsiloxy group, the content of which is 12% by mass to 35% by mass, and which is at least one selected from the group consisting of diphenylsiloxyphenyltrimethicone and phenyltrimethicone; a nonionic surfactant which is a polyoxyethylene sorbitan fatty acid ester having four or more ester bonds, the content of which is 0.5% by mass to 10% by mass (excluding sorbeth-40 tetraoleate); Water content of 0.8% by mass to 2.3% by mass A cleansing cosmetic comprising:

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