Composition for skin protectant

Abstract

To provide a composition for a skin protectant having not only an effect of preventing dyeing of the skin but also an effect of suppressing skin irritation caused by skin irritant components, and having both a dyeing prevention effect and a skin irritation suppression effect.SOLUTION: A composition for a skin protectant, containing a smectite-based clay component that is at least one compound selected from the group consisting of smectite-based clay minerals and organically modified smectite-based clay minerals, and an oil-soluble component, further containing a nonionic dispersion aid having an HLB of 11.0 or less, wherein a content ratio of the smectite-based clay component is 0.01-60 mass% based on the total mass, the composition being applied to the skin to form, on the skin, a protective film for protecting the skin.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a skin protective composition, and more specifically to a skin protective composition that not only prevents skin staining but also suppresses skin irritation caused by skin-irritating ingredients, thereby achieving both stain prevention and skin irritation suppression effects. [Background technology]

[0002] BACKGROUND ART Conventionally, hair has been treated with hair dyes (hair manicures, oxidation hair dyes, etc.), bleaches (hair bleaching agents), perm agents, etc. to achieve desired hair styling.

[0003] For example, hair dyes such as hair colorants (hair manicures) and oxidative hair dyes are used to dye hair and can dye it to a desired color, while bleaches (hair bleaching agents) bleach hair to achieve a desired hair color.

[0004] However, once a hair dye adheres to the skin, it stains the skin, and it is not easy to wash off this hair dye (such as hair manicure or oxidative hair dye). Therefore, in order to prevent hair dyes such as hair colorants from staining the skin, it is known to apply a protective agent to areas of the hair that need to be protected from staining (such as the hairline) before applying the hair dye such as hair colorants to the hair (see, for example, Patent Document 1).

[0005] Furthermore, bleaching agents (hair bleaching agents) contain skin-irritating ingredients such as ammonia and hydrogen peroxide, which can cause skin irritation accompanied by discomfort such as pain during use. Perm agents also cause this skin irritation. Therefore, alleviating this irritation has become an important issue, and various skin irritation alleviators have been proposed (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-56848 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-59079 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the protective agent described in Patent Document 1 has room for further improvement in its effect of preventing dyeing by hair dyes such as hair colorants. Furthermore, the skin irritation mitigating agent described in Patent Document 2 also does not have a sufficient effect of suppressing skin irritation. Furthermore, there is no agent that exhibits both the effect of preventing dyeing and the effect of suppressing skin irritation.

[0008] For these reasons, there has been a demand for the development of a skin protective composition that has the effect of preventing staining of the skin and also has the effect of suppressing skin irritation caused by skin irritating ingredients.

[0009] The present invention has been made in view of the problems associated with the prior art, and an object of the present invention is to provide a skin protective composition that not only prevents staining of the skin but also suppresses skin irritation caused by skin-irritating ingredients, thereby having both the effects of preventing staining and suppressing skin irritation. [Means for solving the problem]

[0010] According to the present invention, there is provided a skin protective composition as shown below.

[0011] [1] A smectite clay component which is at least one compound selected from the group consisting of smectite clay minerals and organically modified smectite clay minerals; and an oil-soluble component, Furthermore, it contains a nonionic dispersing aid with an HLB of 11.0 or less, The content of the smectite clay component is 0.01 to 60% by mass of the total mass, A skin protecting composition that, when applied to the skin, forms a protective film on the skin to protect the skin.

[0012] [2] The skin protective composition according to [1] above, wherein the oil-soluble component comprises at least one selected from the group consisting of components that are solid at 25°C and components that are liquid at 25°C.

[0013] [3] The skin protective composition according to [2] above, wherein the content of the oil-soluble components in a solid state at 25°C is 0.01 to 70% by mass of the total mass.

[0014] [4] The composition for protecting skin according to any one of [1] to [3] above, wherein the content of the dispersing aid is 0.01 to 50% by mass of the total mass.

[0015] [5] The composition for protecting skin according to any one of [1] to [3] above, wherein the content of the oil-soluble component is 0.01 to 99.9% by mass of the total mass.

[0016] [6] The skin protective composition according to any one of [1] to [3], wherein the smectite clay component comprises at least one compound selected from the group consisting of montmorillonite, bentonite, beidellite, nontronite, saponite, hectorite, stevensite, and organically modified products thereof.

[0017] [7] The composition for protecting skin according to any one of [1] to [3] above, further comprising an aqueous component in an amount of 0.01 to 95% by mass of the total mass.

[0018] [8] The skin protective composition according to any one of [1] to [3] above, which is for spray filling.

[0019] [9] A spray composition containing the skin protection composition according to any one of [1] to [3] above.

[0020]

[10] The spray composition according to [9], which contains a propellant and is filled into an aerosol container.

[0021]

[11] A spray container filled with the spray composition described in [9] above. [Effects of the Invention]

[0022] The skin protective composition of the present invention not only has the effect of preventing staining of the skin, but also has the effect of suppressing skin irritation caused by skin-irritating ingredients, thereby achieving the effects of both preventing staining and suppressing skin irritation. DETAILED DESCRIPTION OF THE INVENTION

[0023] The following describes embodiments of the present invention, but it should be understood that the present invention is not limited to the following embodiments, and that appropriate modifications and improvements to the following embodiments based on the ordinary knowledge of those skilled in the art, as long as they do not deviate from the spirit of the present invention, also fall within the scope of the present invention.

[0024] (1) Skin protective composition: The skin protective composition of the present invention contains a smectite clay component, which is at least one compound selected from the group consisting of smectite clay minerals and organically modified smectite clay minerals, and an oil-soluble component, and when applied to the skin, it forms a protective film on the skin that protects the skin.

[0025] This skin protectant composition prevents problems (e.g., pain and other irritation, discoloration, and skin staining) associated with the use of treatments for treating body hair, such as hair dyes (hair colorants, oxidative hair dyes, etc.), bleaches (hair bleaches), and perms. It not only prevents skin staining (skin staining protection), but also inhibits skin irritation caused by skin-irritating ingredients (irritation protection), achieving both dye stain prevention and skin irritation inhibition. Thus, the skin protectant composition of the present invention can be used for both treatments, regardless of whether a hair dye (hair colorant, oxidative hair dye, etc.) or a bleach (hair bleach) is used, eliminating the need for the user to check the type of protectant. Furthermore, since only a single protectant needs to be stored, rather than having to store two protectants, one with skin staining protection and the other with irritation protection, the storage space for the protectant can be reduced.

[0026] Furthermore, when this skin protective composition is applied to the skin, it forms a protective film on the skin, but even if the skin protective composition adheres to hair, this skin protective composition does not inhibit the treatment effect of hair treatment agents (hair dyes, etc.).

[0027] The term "application" includes not only applying the skin protective composition by direct contact with the skin, but also spraying (squirting) the composition onto the skin.

[0028] (1-1) Smectite clay components: The smectite clay component is at least one compound selected from the group consisting of smectite clay minerals and organically modified smectite clay minerals. By incorporating this smectite clay component in addition to the oil-soluble component, the skin protective composition of the present invention not only prevents skin staining, but also suppresses skin irritation caused by skin-irritating components, thereby achieving both stain prevention and skin irritation suppression effects.

[0029] Smectite clay minerals are clay minerals having the general formula (1) (Clay Handbook, Second Edition, edited by the Clay Science Society of Japan, Gihodo Publishing Co., Ltd., 1987, pp. 58-66). X m (Y 2+ ,Y 3+ ) 2~3 Z4O 10 (OH)2·nH2O···(1) (In the general formula (1), X is at least one of K, Na, ½Ca, and ½Mg, m is 0.25 to 0.6, and Y 2+ is Mg, Fe 2+ , Mn 2+ , Ni, Zn, and Li, and Y 3+ is Al, Fe 3+ , Mn 3+ and Cr 3+ Z is at least one of Si and Al, and nH2O is interlayer water.

[0030] Specific examples of the smectite clay minerals include montmorillonite, bentonite, beidellite, nontronite, saponite, hectorite, stevensite, sauconite, etc. The smectite clay minerals may be natural or may be synthesized by hydrothermal synthesis or the like.

[0031] An organically modified smectite clay mineral is a smectite clay mineral that has been organically modified. "Organic modification" refers to a process in which a portion of the smectite clay mineral is bonded to a portion of an organic compound via a covalent bond or an ionic bond. Examples of such a process include a method in which a quaternary amine group of an organic compound is bonded to the anion portion of the smectite clay mineral, and a method in which a carboxyl group of an organic compound is bonded to the cation portion of the smectite clay mineral.

[0032] The organic compound having a quaternary amino group used for organically modifying smectite clay minerals is not particularly limited, but a specific example is quaternium. This quaternium is a low-molecular-weight substituted quaternary ammonium salt. It is preferable to use a quaternium that is a cosmetic ingredient registered with the International Cosmetic Ingredients Standard (INCI).

[0033] More specific examples of such organically modified smectite clay minerals include quaternium-18 bentonite, quaternium-18 hectorite, quaternium-90 bentonite, quaternium-90 montmorillonite, disteardimonium hectorite, stearalkonium bentonite, stearalkonium hectorite, and hydrogenated tallowalkonium bentonite.

[0034] The organically modified smectite clay mineral may be prepared by a conventionally known method, but commercially available products may also be used.

[0035] In the present invention, the smectite clay component preferably contains at least one compound selected from the group consisting of montmorillonite, bentonite, beidellite, nontronite, saponite, hectorite, stevensite, and organically modified products thereof, and more preferably contains at least the organically modified products. By containing such a compound, not only is an additional effect of preventing skin staining exhibited, but also an additional effect of suppressing skin irritation caused by skin irritating components exhibited.

[0036] The content of the smectite clay component is 0.01 to 60% by mass of the total mass, preferably 0.025 to 40% by mass, and more preferably 0.05 to 20% by mass. By keeping the content within this range, not only is an additional effect of preventing skin staining exhibited, but also an additional effect of suppressing skin irritation caused by skin irritating components is exhibited.

[0037] (1-2) Oil-soluble components: The oil-soluble component is a component that dissolves in a non-polar oil at room temperature. An example of a non-polar oil is mineral oil. In the present invention, the oil-soluble component is not particularly limited as long as it has such properties and can be appropriately selected and used.

[0038] The oil-soluble component preferably contains at least one selected from the group consisting of components that are solid at 25° C. (solid oil-soluble components) and components that are liquid at 25° C. (liquid oil-soluble components), and more preferably contains at least a solid oil-soluble component. In this way, not only is an additional effect of preventing staining of the skin exerted, but also an additional effect of suppressing skin irritation caused by skin-irritating components is exerted.

[0039] Specific examples of solid oil-soluble components include higher alcohols, waxes, etc. These may be blended alone or in combination of two or more.

[0040] Examples of higher alcohols include cetyl alcohol, stearyl alcohol, arachidyl alcohol, behenyl alcohol, hardened rapeseed oil alcohol, and myristyl alcohol.

[0041] Examples of waxes include natural waxes such as vegetable waxes and animal waxes, synthetic waxes, mineral waxes, silicone waxes, etc. Examples of vegetable waxes include carnauba wax, rice wax, candelilla wax, hydrogenated jojoba oil, beeswax, Japan wax, hydrogenated rice bran oil, shea butter, Thiobromaga grandiflorum seed butter, Astrocaryum murumuru seed butter, mango seed butter, and rice wax.

[0042] Specific examples of liquid oil-soluble ingredients include light isoparaffin, liquid isoparaffin, heavy isoparaffin, liquid paraffin, oleyl alcohol, jojoba oil, macadamia seed oil, coconut oil, tri(caprylic / capric acid)glyceryl, (C9-12) alkane, (C13-15) alkane, (caprylic / capric acid) coconut alkyl, isostearyl alcohol, PG isostearate, methylheptyl isostearate, isostearyl isostearate, ethyl isostearate, isononyl isononanoate, ethylhexyl isononanoate, tricyclodecane methyl isononanoate, octyldodecanol, olive oil, oleyl alcohol, diethoxyethyl succinate, bisethoxydiglycol succinate, rice bran oil, di(caprylic / capric acid) butylene glycol, di(caprylic / capric acid) PG, diheptanoic acid Examples of suitable ingredients include neopentyl glycol, propylene glycol dicaprylate, squalane, diethyl sebacate, tea seed oil, docosane, caprylic / capric triglyceride, triheptanoin, isodecyl neopentanoate, horse oil, methylheptyl palmitate, isopropyl palmitate, ethylhexyl palmitate, liquid lanolin, ethylhexyl hydroxystearate, castor oil, sunflower seed oil, dipentaerythrityl hexaisononanoate, isopropyl myristate, octyldodecyl myristate, methylheptyl myristate, methylheptyl laurate, diisostearyl malate, dicaprylyl carbonate, cyclopentasiloxane, dimethicone, dimethiconol, amodimethicone, phenyl trimethicone, diphenylsiloxyphenyl trimethicone, and polysilicone.

[0043] The content of the oil-soluble component is not particularly limited, but can be 0.01 to 99.9% by mass of the total mass, preferably 0.025 to 95% by mass, and more preferably 0.05 to 90% by mass. By keeping the content within this range, not only is an additional effect of preventing staining of the skin exerted, but also an additional effect of suppressing skin irritation caused by skin irritating components is exerted.

[0044] In particular, when a solid oil-soluble component is contained, its content is not particularly limited, but is preferably 0.01 to 70% by mass, more preferably 0.025 to 60% by mass, and even more preferably 0.05 to 50% by mass of the total mass. By keeping the content within the above range, not only is an additional effect of preventing staining of the skin exhibited, but also an additional effect of suppressing skin irritation caused by skin irritating components is exhibited.

[0045] When a liquid oil-soluble component is contained, its content is not particularly limited, but is preferably 1.0 to 95% by mass, more preferably 5.0 to 90% by mass, and even more preferably 10 to 85% by mass of the total mass. By keeping the content within this range, not only is an additional effect of preventing staining of the skin exhibited, but also an additional effect of suppressing skin irritation caused by skin irritating components is exhibited.

[0046] (1-3) Dispersing aid: The skin protective composition may further contain a dispersing aid, and in the present invention, a nonionic dispersing aid is contained. The inclusion of a nonionic dispersing aid further improves the dispersibility of the skin protective composition.

[0047] There are no particular limitations on the nonionic dispersing aid, but it can have an HLB of 14.5 or less, preferably an HLB of 14.0 or less. In the present invention, it has an HLB of 11 or less. The lower limit of this HLB can be 0, or even 3. By satisfying these conditions, the dispersibility of the skin protective composition will be excellent. Furthermore, the spraying performance (aerosol sprayability) will be good when filled into an aerosol container for use.

[0048] Specific examples of such nonionic dispersion aids include polyoxyalkylene alkyl ethers, polyoxyalkylene alkenyl ethers, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene polyoxypropylene alkyl ethers, sucrose fatty acid esters, sorbitan fatty acid esters, alkyl saccharide surfactants, organic acid monoglycerides, glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene hydrogenated castor oil, fatty acid alkanolamides, coconut oil fatty acid ethanolamides, and alkylamine oxides. Examples of polyoxyalkylene alkyl ethers include polyoxyethylene lanolin alcohol (laneth), polyoxyethylene cetyl ether (ceteth), polyoxyethylene stearyl ether (steareth), polyoxyethylene oleyl ether (oleth), and pareth. Examples of polyglycerin fatty acid esters include polyglyceryl pentaisostearate, polyglyceryl pentaisostearate, and polyglyceryl isostearate / succinate.

[0049] The content of the nonionic dispersion aid is not particularly limited, but is preferably 0.01 to 50 mass % of the total mass, more preferably 0.025 to 40 mass %, and even more preferably 0.05 to 30 mass %. By setting the content within the above range, not only is a further effect of preventing staining of the skin exerted, but also a further effect of suppressing skin irritation caused by skin irritating ingredients is exerted.

[0050] (1-4) Aqueous component: The skin protective composition of the present invention may further contain an aqueous component, which not only further prevents staining of the skin but also further suppresses skin irritation caused by skin-irritating components.

[0051] The aqueous component is an aqueous component that can be used in the fields of cosmetics and pharmaceuticals, and includes, for example, purified water, hot spring water, deep sea water, steam-distilled water from plants, etc., and solvents that have an affinity with this water.

[0052] More specifically, such aqueous components include the above-mentioned water, glycols such as glycerin, 1,3-butylene glycol, and propylene glycol, and lower alcohols such as ethanol and propanol. Of these, water is preferably used.

[0053] The content of the aqueous component is not particularly limited, but can be 0.01 to 95% by mass of the total mass, preferably 0.05 to 90% by mass, and more preferably 0.1 to 85% by mass. By setting the content within this range, not only is an additional effect of preventing dyeing of the skin exerted, but also an additional effect of suppressing skin irritation caused by skin irritating components is exerted.

[0054] (1-5) Other ingredients: The skin protective composition of the present invention may further contain other ingredients in addition to the above ingredients, if necessary.

[0055] Examples of other ingredients include polyhydric alcohols, lower fatty acids, lower alcohols, antioxidants, storage stabilizers, fragrances, colorants, moisturizers, anti-inflammatory agents, sequestering agents, texture improvers, thickeners, UV absorbers, pH adjusters, plant-derived extracts, animal-derived extracts, preservatives, and antibacterial agents.

[0056] The content of the other components can be set as appropriate, and may be, for example, about 0.001 to 20% by mass.

[0057] (2) Uses of the skin protective composition: The skin protective composition of the present invention is used to protect the skin from treatment agents such as hair coloring agents, perm agents, etc. Specifically, it can prevent the skin (scalp, forehead, etc.) from being stained by coloring agents when coloring hair, and can prevent irritation caused by bleaching agents, perm agents, etc.

[0058] The state of the skin protective composition of the present invention is not particularly limited and can be determined as appropriate, and can be in a liquid state at room temperature, but may also be in a semi-solid or solid state, such as a cream, gel, or balm.

[0059] The skin protective composition of the present invention can be used, for example, by applying it to the skin before using a treatment such as a hair coloring agent, specifically, the hairline, scalp, etc.

[0060] If necessary, it may be applied to areas where treatments such as coloring agents may come into contact (for example, the forehead, temples, ears, etc.) Application methods include using fingers, palms, paintbrushes, combs, brushes, rollers, nozzle-equipped containers, sprays, etc.

[0061] The skin protective composition of the present invention also has the advantage of being sprayed well when applied using a sprayer. That is, the skin protective composition of the present invention can be sprayed toward the skin and applied to the skin, and in this process, an uneven coating film is unlikely to form, the spray nozzle is unlikely to clog, and good spraying is achieved. Thus, it is also preferable that the skin protective composition of the present invention be used for spraying using a spray (i.e., for spray filling).

[0062] The spray is not particularly limited as long as it can spray the skin protective composition, and examples include an aerosol system using an aerosol container (aerosol container) and a dispenser system. The aerosol system is a system in which a base ingredient of a skin protective composition or the like is pressurized into a pressure-resistant container such as an aerosol container together with a propellant, and the base ingredient of a skin protective composition or the like is sprayed upon opening the container to release the pressure. The dispenser system is a system in which a base ingredient of a skin protective composition or the like is pressurized and sprayed using a dispenser (sprayer).

[0063] As described above, the aerosol method using an aerosol container contains a base agent that forms the main component of a skin protective composition and a propellant (e.g., liquid gas) for spraying the base agent in the form of fine particles, and then sprays the mixture of the fine particles of the base agent and the propellant. The mixing ratio of the base agent to the propellant is not particularly limited, but can be, for example, 1:9 to 9:1.

[0064] The propellant is not particularly limited as long as it can spray the mixture (liquid mixture) of the base agent and the propellant in the form of fine particles, and examples thereof include liquid gases such as liquefied gases and compressed gases. More specifically, examples of liquefied gases include isobutane, normal butane, propane, liquefied petroleum gas (LPG) obtained by mixing these, dimethyl ether (DME), isopentane, etc. Examples of compressed gases include nitrogen, nitrous oxide, hydrogen, carbon dioxide, oxygen, and air. Note that a single propellant may be used, or two or more may be mixed and used.

[0065] (3) Spray composition: The spray composition of the present invention contains the skin protection composition of the present invention. This spray composition not only prevents staining of the skin but also suppresses skin irritation caused by skin-irritating ingredients, and in addition to having both the effects of preventing staining and suppressing skin irritation, when applied to the skin, it is less likely to form an uneven coating film, is less likely to clog the spray nozzle, and provides good sprayability.

[0066] There are no particular limitations on the spray as long as it is capable of spraying the skin protective composition, and examples include aerosol systems using aerosol containers and dispenser systems.

[0067] The spray composition of the present invention contains a propellant and can be filled into an aerosol container.

[0068] Examples of propellants include liquid gases such as liquefied gases and compressed gases. More specifically, liquefied gases include isobutane, normal butane, propane, and mixtures thereof such as liquefied petroleum gas (LPG), dimethyl ether (DME), and isopentane. Compressed gases include nitrogen, nitrous oxide, hydrogen, carbon dioxide, oxygen, and air. Note that a single propellant may be used, or two or more may be mixed together.

[0069] The mixing ratio of the skin protective composition to the propellant is not particularly limited, but can be, for example, 1:9 to 9:1.

[0070] (4) Spray container The spray container of the present invention is filled with the spray composition of the present invention. This spray container not only has the effect of preventing staining of the skin but also has the effect of suppressing skin irritation caused by skin-irritating components, and in addition to having both the effect of preventing staining and suppressing skin irritation, when applied to the skin, it is less likely to form an uneven coating film, the spray nozzle is less likely to clog, and good spraying is achieved.

[0071] The spray container body filled with the spray composition of the present invention can be a conventionally known spray container. [Example]

[0072] The present invention will be specifically described below based on examples, but the present invention is not limited to these examples.

[0073] (Examples 15 to 22, 27 to 36, Comparative Examples 1 to 12, Reference Examples 1 to 14, 23 to 26) Skin protective compositions of Examples 15-22, 27-36, Comparative Examples 1-12, and Reference Examples 1-14, 23-26 were prepared by mixing the components in the proportions (mass%) shown in Tables 1 to 5. Specifically, the components shown in Tables 1 to 5 were first mixed in a beaker in the proportions shown. The mixture was then heated to 60°C and stirred at 1000 rpm for 30 minutes, and then allowed to stand for 24 hours to prepare the skin protective compositions.

[0074] Each component used in each of the Examples, Reference Examples and Comparative Examples is specifically shown below.

[0075] (Smectite clay minerals) "Montmorillonite" refers to montmorillonite manufactured by Natural Cosmetics Research Institute Co., Ltd. "Bentonite" refers to bentonite manufactured by Kunimine Kogyo Co., Ltd. "Ghassoul" refers to Ghassoul manufactured by Niad Co., Ltd. "Quaternium-18 bentonite" refers to Quaternium-18 bentonite manufactured by Kunimine Kogyo Co., Ltd. "Quaternium-18 Hectorite" refers to Quaternium-18 Hectorite manufactured by Kunimine Kogyo Co., Ltd.

[0076] (Other minerals) "Talc" refers to talc manufactured by Asada Flour Milling Co., Ltd. "Mica" refers to mica manufactured by Dai-Nippon Kasei Co., Ltd. "Kaolin" refers to kaolin manufactured by Hayashi Pure Chemical Industries, Ltd. "Sea Silt" is a marine silt FP manufactured by Angkor Ang Co., Ltd.

[0077] (Oil (liquid oil-soluble ingredient)) "Liquid isoparaffin" refers to liquid isoparaffin manufactured by NOF Corporation. "Heavy isoparaffin" refers to heavy isoparaffin manufactured by NOF Corporation. "Oleyl alcohol" refers to oleyl alcohol manufactured by Kokyu Alcohol Kogyo Co., Ltd. "Jojoba oil" refers to jojoba oil manufactured by Yokozeki Oil & Fat Industries Co., Ltd. "Liquid paraffin" refers to liquid paraffin manufactured by MORESCO Corporation.

[0078] (Oil (solid oil, solid oil-soluble component)) "Microcrystalline wax" refers to microcrystalline wax manufactured by Nikko Rica Corporation. "Behenyl alcohol" refers to behenyl alcohol manufactured by Takakyu Alcohol Kogyo Co., Ltd. "Shea butter oil" refers to shea butter oil manufactured by Koei Kogyo Co., Ltd. "Vaseline" refers to petrolatum manufactured by Nikko Rica Corporation.

[0079] (dispersant) "(VP / hexadecene) copolymer" is a copolymer of vinylpyrrolidone and hexadecene, and refers to (VP / hexadecene) copolymer manufactured by Ashland Japan Co., Ltd. "Diisostearyl malate" refers to diisostearyl malate manufactured by Kokyu Alcohol Kogyo Co., Ltd. "Di(caprylic / capric) Butylene Glycol" refers to a dispersant that is a diester of caprylic and capric acids with 1,3-butanediol and is manufactured by IOI Oleo GmbH. "Triheptanoin" is a dispersant manufactured by IOI Oleo GmbH and is a triester of heptanoic acid and glycerin. "Polyglyceryl-10 decaisostearate" is a decaester of glycerin decamer and isostearic acid, and refers to a dispersant manufactured by Sakamoto Pharmaceutical Industry Co., Ltd. "Polyglyceryl-10 pentaisostearate" is a pentaester of a decamer of glycerin and isostearic acid, and refers to a dispersant manufactured by Sakamoto Pharmaceutical Co., Ltd. "Ceteth-2" is a polyethylene glycol ether of cetanol, and refers to a dispersant manufactured by Aoki Oil & Fat Industries Co., Ltd. "Sorbitan monolaurate" refers to a dispersant manufactured by Kao Corporation, which is a monoester of lauric acid and sorbitol anhydride. "Coconut oil fatty acid PEG-7 glyceryl" is a dispersant manufactured by Miyoshi Oil & Fats Co., Ltd., which is obtained by addition polymerization of coconut fatty acid glyceryl with ethylene oxide. "PEG-7 (caprylic / capric acid) glycerides" is a dispersant manufactured by Aoki Oil & Fat Industries Co., Ltd., which is produced by the addition polymerization of ethylene oxide to a mixture of mono-, di-, and triglycerides of caprylic acid and capric acid. "Polyglyceryl-3 caprylate" is a monoester of caprylic acid and polyglycerin-3, and refers to a dispersant manufactured by Nikko Chemicals Co., Ltd. "Polyglyceryl-10 laurate" is an ester of a decamer of glycerin and lauric acid, and refers to a dispersant manufactured by Sakamoto Pharmaceutical Co., Ltd.

[0080] (evaluation) The resulting skin protective composition was then evaluated for the following properties (protection against skin staining, protection against irritation, dispersibility, and aerosol ejection properties). The evaluation results are shown in Tables 1 to 5.

[0081] [Skin stain protection] A pigskin measuring 5 cm wide x 5 cm long was prepared, and the upper half (upper surface) of the pigskin was not coated with the skin protective composition, while the lower half (lower surface) was coated with the skin protective composition. A color treatment agent (oxidative hair dye) consisting of a 1:1 mixture of Wella Koreston (manufactured by HFC Prestige Japan LLC) 1 level and Wellaoxy 6% (manufactured by HFC Prestige Japan LLC) was then applied to the entire surface of the pigskin and left to stand for 10 minutes. The color treatment agent was then thoroughly washed with running water to obtain pigskin for evaluation.

[0082] Next, the entire surface of the obtained pigskin for evaluation was photographed, and then the image processing software "Image J" (manufactured by the National Institutes of Health, USA) was used to determine the area of ​​the non-stained area (the area where staining was avoided by the skin protective composition) in the lower half (lower surface). The ratio of the non-stained area to the total area of ​​the lower half of the pigskin for evaluation was then calculated to determine the protection rate. The obtained protection rate (%) was evaluated according to the following evaluation criteria. The evaluation results are shown in Tables 1 to 5. SS: 100% or less, 80% or more S: Less than 80%, 60% or more A: Less than 60%, 40% or more B: Less than 40%, 20% or more C: Less than 20%, 0% or more

[0083] [Irritation protection] First, bleach 1 (manufactured by HFC Prestige Japan LLC) and Wellaoxy 6% (manufactured by HFC Prestige Japan LLC) were mixed at a ratio of 1:3 to prepare a bleaching agent. Next, the skin protectant composition was applied to the skin surface in an area with a diameter of 3 cm, and the bleaching agent was then applied on top of that. The test was then conducted after leaving it for 10 minutes. The test was evaluated by three panelists, and the state before and after application of the bleaching agent were scored according to the following criteria. 4 points: No discoloration of the skin and no pain 3 points: No discoloration of the skin and almost no pain 2 points: No visible discoloration on the skin, but slight pain 1 point: No visible discoloration of the skin, but pain 0 points: Skin turns red and discolors, and there is severe pain

[0084] The average value was then calculated and evaluated according to the following evaluation criteria: an average value of 4.0 or more and over 3.0 was rated "A", an average value of 3.0 or less and over 2.0 was rated "B", an average value of 2.0 or less and over 1.0 was rated "C", and an average value less than 1.0 was rated "D". The evaluation results are shown in Tables 1 to 5.

[0085] [Dispersibility] The smectite clay mineral was added to the oil solution, stirred at 1000 rpm for 30 minutes, and the test solution was left to stand for 10 minutes. After standing, the state was visually inspected and evaluated. The evaluation criteria are shown below. The evaluation results are shown in Tables 1 to 5. A: No lumps were found. B: Some lumps are observed C: Lumps are observed throughout

[0086] [Aerosol ejection] An aerosol container (Mitani Valve Co., Ltd., nozzle diameter (outer diameter) 0.5 mm) was filled with a 1:1 mixture of the prepared skin protective composition and LPG (liquefied gas) propellant, and the contents were sprayed horizontally into the air for 5 seconds. A piece of paper (21 cm long x 29.7 cm wide, Oji Paper Co., Ltd.) was placed 30 cm from the nozzle and 30 cm below the aerosol container, and the particle size of the mist (fine particles) that fell onto the paper was measured and evaluated (evaluation of aerosol ejectability) according to the following criteria.

[0087] When measuring the particle size of the fine particles, four 1 cm square areas were randomly selected, and measurements were taken of five fine particles within each area, and the average value was calculated. Evaluation was based on this average value. A: The particle size of the fine particles is 1 mm or less B: The particle size of the fine particles is more than 1 mm and less than 3 mm (a slightly rough coating film was formed) C: The particle size of the fine particles is more than 3 mm and less than 6 mm (an uneven coating film was formed)

[0088] [Table 1]

[0089] [Table 2]

[0090] [Table 3]

[0091] [Table 4]

[0092] [Table 5]

[0093] (Consideration) The results in Tables 1 to 5 show that the skin protective compositions of Examples 15 to 22 and 27 to 36 not only prevent skin staining, but also suppress skin irritation caused by skin-irritating ingredients, demonstrating both the effects of preventing staining and suppressing skin irritation. Furthermore, it can be seen that the skin protective compositions of the present invention are less likely to form uneven coatings when applied to the skin, are less likely to clog spray nozzles, and provide good spraying. [Industrial Applicability]

[0094] The skin protective composition of the present invention can be used as a protective agent for protecting the skin (for example, the scalp or forehead) when coloring hair, etc.

Claims

1. a smectite clay component which is at least one compound selected from the group consisting of smectite clay minerals and organically modified smectite clay minerals; and an oil-soluble component, Further, a nonionic dispersing aid having an HLB of 11.0 or less is contained, The content of the smectite clay component is 0.01 to 60% by mass of the total mass, A skin protecting composition that, when applied to the skin, forms a protective film on the skin to protect the skin.

2. 2. The skin protective composition according to claim 1, wherein the oil-soluble component comprises at least one selected from the group consisting of components that are solid at 25°C and components that are liquid at 25°C.

3. 3. The skin protective composition according to claim 2, wherein the content of the oil-soluble components in a solid state at 25°C is 0.01 to 70% by mass of the total mass of the composition.

4. 4. The skin protective composition according to claim 1, wherein the content of the dispersing aid is 0.01 to 50% by mass of the total mass of the composition.

5. 4. The composition for protecting skin according to claim 1, wherein the content of the oil-soluble component is 0.01 to 99.9% by mass of the total mass.

6. The skin protective composition according to any one of claims 1 to 3, wherein the smectite clay component comprises at least one compound selected from the group consisting of montmorillonite, bentonite, beidellite, nontronite, saponite, hectorite, stevensite, and organically modified products thereof.

7. The skin protective composition according to any one of claims 1 to 3, further comprising an aqueous component in an amount of 0.01 to 95% by weight of the total weight.

8. The skin protective composition according to any one of claims 1 to 3, which is for spray filling.

9. A spray composition comprising the skin protective composition according to any one of claims 1 to 3.

10. The spray composition according to claim 9, which contains a propellant and is filled into an aerosol container.

11. A spray container filled with the spray composition according to claim 9.

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