Skin cleansing composition

Abstract

To provide a skin cleansing composition with low irritation, superior foam formation, and a superior post-cleansing feel.SOLUTION: A skin cleansing composition of the present invention contains lauramidopropyl hydroxysultaine, lauramidopropyl betaine, and decyl glucoside, and exhibits a pH of 4.0 to 6.0.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a skin cleansing composition, and more particularly to a skin cleansing composition for women's delicate zones. [Background technology]

[0002] It is difficult to seek advice on problems related to women's private parts (genitals), and many women are unable to seek advice while carrying these problems with them. In recent years, various information and methods have been proposed to solve problems related to women's private parts, such as Femtech and Femcare. Problems related to women's private parts include itching, odor, stuffiness, rashes, and dryness.

[0003] Because it is a delicate area, washing it too much with regular soap can cause skin irritation and inflammation.

[0004] For example, Patent Document 1 discloses a skin care agent for the delicate zone that contains plant-derived ingredients, characterized in that the plant-derived ingredients include grapefruit fruit extract, perilla leaf extract, tea leaf extract, chamomile flower extract, apple fruit extract, rosemary leaf extract, gynostemma leaf extract, persimmon tannin, and flaxseed extract. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-176099 A Summary of the Invention [Problem to be solved by the invention]

[0006] The pH of human skin is said to be about 4.5 to 6.0. The pH of skin refers to the pH of the lipid membrane on the skin surface (sebum membrane) that thinly covers the skin surface. The lipid membrane on the skin surface exhibits a weak acidity of pH 4.5 to 6.0 due to the influence of free fatty acids present in sebum and lactic acid and amino acids contained in sweat. The pH of a skin cleansing composition is preferably within the pH range of the skin. If the pH is outside the skin's pH range, irritation to the skin becomes stronger.

[0007] From this viewpoint, it is preferable that the cleansing agent for the delicate zone is weakly acidic (pH is about 4.5 to 6.0). Ordinary skin soaps are alkaline. Although alkaline skin soaps have good foaming and cleansing properties, they have the problem of being too irritating to the delicate zone.

[0008] On the other hand, weak acid soaps do not foam well, giving the impression that it is unclear whether they are cleaning properly or not. In addition, weak acid soaps that are generally available on the market have a pH of about 6.5 to 7, but compared to the pH of the skin, some of them are weakly alkaline and have a low effect of reducing irritation to the skin.

[0009] In addition, since this is a delicate area, it is required that cleansers for the delicate area do not leave a tingling or sticky feeling after cleansing (usage sensation).

[0010] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a skin cleansing composition that is low irritation, has excellent foaming properties, and provides an excellent feel after cleansing. [Means for solving the problem]

[0011] The skin cleansing composition of the present invention, which has been able to solve the above problems, is characterized by containing lauramidopropyl hydroxysultaine, lauramidopropyl betaine, and decyl glucoside. The present inventors have found that by combining three types of cleansing components, lauramidopropyl hydroxysultaine, lauramidopropyl betaine, and decyl glucoside, a skin cleansing composition that is excellent in foaming in the weak acid range and has an excellent feel when used can be obtained, and have completed the present invention. Effect of the Invention

[0012] According to the present invention, it is possible to provide a skin cleansing composition which is low irritation, has good foaming properties, and is excellent in feel when used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The skin cleansing composition of the present invention is characterized by containing lauramidopropyl hydroxysultaine, lauramidopropyl betaine, and decyl glucoside as cleansing components.

[0014] The content of lauramidopropyl hydroxysultaine in the skin cleansing composition of the present invention is preferably 3% by mass or more, preferably 4% by mass or more, and more preferably 5% by mass or more, and is preferably 9% by mass or less, more preferably 8% by mass or less, and even more preferably 7% by mass or less.

[0015] The content of lauramidopropyl betaine in the skin cleansing composition of the present invention is preferably 0.7% by mass or more, preferably 1.2% by mass or more, and more preferably 1.7% by mass or more, and is preferably 4.7% by mass or less, more preferably 4.2% by mass or less, and even more preferably 3.7% by mass or less.

[0016] The content of decyl glucoside in the skin cleansing composition of the present invention is preferably 0.5% by mass or more, more preferably 0.75% by mass or more, and even more preferably 1.2% by mass or more, and is preferably 2.5% by mass or less, more preferably 2.0% by mass or less, and even more preferably 1.7% by mass or less.

[0017] In the skin cleansing composition of the present invention, the total content of lauramidopropyl hydroxysultaine, lauramidopropyl betaine, and decyl glucoside is preferably 5% by mass or more, more preferably 7% by mass or more, even more preferably 9% by mass or more, and is preferably 15% by mass or less, more preferably 13% by mass or less, and even more preferably 11.5% by mass or less.

[0018] The pH of the skin cleansing composition of the present invention is preferably 4.0 to 6.0, more preferably 4.0 to 5.0, and even more preferably 4.0 to 4.5. By keeping the pH at a weak acidity, irritation to the skin is reduced.

[0019] The skin cleansing composition of the present invention preferably contains a pH adjuster, such as lactic acid, citric acid, succinic acid, ascorbic acid, fumaric acid, maleic acid, etc., preferably lactic acid, citric acid, succinic acid, and ascorbic acid, and more preferably citric acid.

[0020] The pH adjuster is preferably blended in such an amount that the pH of the skin cleansing composition is 4.0 to 6.0, more preferably 4.0 to 5.0, and even more preferably 4.0 to 4.5. The content of the pH adjuster is not particularly limited, but is preferably 0.05% by mass to 1% by mass, and more preferably 0.1% by mass to 0.7% by mass.

[0021] The skin cleansing composition of the present invention preferably contains a moisturizing agent. Examples of moisturizing agents include proteins such as collagen, elastin, and keratin, or derivatives thereof, hydrolysates and salts thereof, mucopolysaccharides such as hyaluronic acid and chondroitin sulfate, and derivatives thereof, amino acids such as serine, glycine, theanine, aspartic acid, and arginine, and derivatives thereof, sorbitol, erythritol, trehalose, inositol, glucose, xylitol, sucrose and derivatives thereof, dextrin and derivatives thereof, sugars such as honey, D-panthenol and derivatives thereof, glycolipids, and ceramides. By incorporating these moisturizing agents, it is possible to prevent the skin from drying and to moisturize the skin.

[0022] Specific examples of the moisturizer include glycerin, diglycerin, triglycerin, polyglycerin, 3-methyl-1,3-butanediol (isopropylene glycol), 1,3-butylene glycol, isoprene glycol, polyethylene glycol, 1,2-pentanediol (pentylene glycol), 1,2-hexanediol, propylene glycol, dipropylene glycol, polypropylene glycol, ethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, and neopentyl glycol.

[0023] As the moisturizing agent, it is preferable to use glycerin, sodium hyaluronate, hydrolyzed collagen, hydrolyzed hyaluronic acid, sodium DL-pyrrolidone carboxylate solution (Na PCA), honey, betaine (trimethylglycine), or the like.

[0024] The content of the moisturizer in the skin cleansing composition of the present invention is not particularly limited, but is preferably 4% by mass or more, more preferably 4.5% by mass or more, even more preferably 5% by mass or more, preferably 9% by mass or less, preferably 8% by mass or less, and even more preferably 76% by mass or less.

[0025] The skin cleansing composition of the present invention preferably contains a thickener. The thickener is preferably, for example, a water-soluble polymer.

[0026] Water-soluble polymers are used to stabilize the system, improve usability and feeling of use, and to obtain a moisturizing effect. Specific examples of water-soluble polymers include plant-based water-soluble polymers such as gum arabic, guar gum, carrageenan, pectin, agar, locust bean gum, and cellulose; Examples of suitable water-soluble polymers include microbial fermentation water-soluble polymers such as xanthan gum and gellan gum; animal-based water-soluble polymers such as casein and gelatin; starch-based water-soluble polymers such as starch; water-soluble polymers derived from seaweed such as sodium alginate; vinyl-based polymers such as carboxyvinyl polymers; polyoxyethylene-based polymers such as polyoxyethylene sorbitan laurate, polyoxyethylene sorbitan stearate, and polyoxyethylene sorbitan oleate (polysorbate 80); polyoxyethylene polyoxypropylene copolymer-based polymers; acrylic polymers such as sodium polyacrylate; and inorganic water-soluble polymers such as bentonite and hectorite.

[0027] Examples of the cellulose-based water-soluble polymer include methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, nitrocellulose, and crystalline cellulose.

[0028] When the skin cleansing composition of the present invention contains a thickener, the thickener is preferably one that does not inhibit the foaming property of the cleansing component.Hydroxyethyl cellulose is preferable as the thickener that does not inhibit the foaming property of the cleansing component.By using hydroxyethyl cellulose as the thickener, the shape retention after foaming is improved.

[0029] The content of the thickener in the skin cleansing composition of the present invention is not particularly limited, but is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, preferably 1% by mass or less, preferably 0.8% by mass or less, and even more preferably 0.6% by mass or less.

[0030] The skin cleansing composition of the present invention may further contain, if necessary, ingredients that are usually used in preparations such as cosmetics, pharmaceuticals, and topical medicines, such as water (including purified water, hot spring water, deep sea water, and water obtained by steam distillation of plants), oils, surfactants (including emulsifiers), powders, alcohols, resins, inclusion compounds, antibacterial agents, preservatives, fragrances, deodorants, salts, refreshing agents, extracts derived from plants, animals, and microorganisms, blood circulation promoters, skin whitening agents, cell activators, UV protection agents, anti-inflammatory agents, antioxidants, astringents, antiseborrheic agents, active oxygen removers, chelating agents, keratolytic agents, enzymes, hormones, vitamins, etc., within the scope of the present invention. Specific examples of suitable ingredients are shown below. Here, the term "derivative" includes salts that can be formed.

[0031] As the oil agent, any oil agent that is used in ordinary detergents to improve the feeling of use can be used, regardless of whether it is a natural oil or a synthetic oil, or whether it is a solid, semi-solid, liquid, etc., and can include hydrocarbons, waxes, fatty acids, higher alcohols, ester oils, silicone oils, fluorine-based oils, etc. Preferred examples of oil agents include hydrocarbons such as squalane and vaseline, oils and fats derived from plants and animals such as castor oil and mink oil, and waxes such as beeswax, carnauba wax, candelilla wax, and gay wax.

[0032] The emulsifier emulsifies the oil to form a cream, and examples of the emulsifier include sodium lauroyl glutamate, glyceryl monostearate, POE glyceryl monostearate, stearic acid, and hydrogenated palm fatty acid glycerides.

[0033] Examples of alcohols include lower alcohols such as ethanol and isopropanol, higher alcohols such as cetanol and behenyl alcohol, glycerin, diglycerin, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol (BG), and polyethylene glycol.

[0034] Examples of the extracts derived from animals or microorganisms include serum deproteinization, spleen, egg components of chickens, etc., eggshell membrane extract, cockscomb extract, shell extract, shellfish meat extract, royal jelly, silk protein and its decomposition products or derivatives thereof, hemoglobin or its decomposition products, lactoferrin or its decomposition products, mollusks such as squid ink, fish meat, etc., extracts derived from animals such as birds, shellfish, insects, fish, and mollusks, and extracts derived from microorganisms such as Ganoderma lucidum extract, etc. By incorporating an extract derived from an animal or microorganism, it is possible to impart moisturizing effects, cell activation effects, skin whitening effects, anti-inflammatory effects, active oxygen removal effects, blood circulation promotion effects, etc.

[0035] The plant extract is not particularly limited in terms of the part of the plant to be extracted, the extraction method, etc., and can be extracted from, for example, the whole plant, or the roots, stems, trunks, bark, buds, leaves, flowers, fruits, seeds, etc. of the plant, which can be appropriately treated by drying, shredding, squeezing, fermentation, etc., and extracted at low temperature or room temperature to warming using various suitable solvents. As the extraction solvent, for example, one or more of water; lower monohydric alcohols such as methanol and ethanol; liquid polyhydric alcohols such as glycerin, propylene glycol, and 1,3-butylene glycol can be used. In addition, extraction can be performed using lipophilic solvents such as hexane, acetone, ethyl acetate, and ether, and extraction with oily components such as squalane may also be used. The obtained extract can be filtered, adsorbed, decolorized, or purified to form a solution, paste, gel, or powder. If necessary, purification treatment such as deodorization and decolorization may be performed to the extent that the effect is not affected. As the extraction method, for example, the extraction method for obtaining each of the above-mentioned extracts can be adopted.

[0036] Plants include Alpinia speciosa, asparagus, wild rose (Rose), raspberry, Sophora japonica (Sophora japonica), Japanese laurel, Japanese gokahi (Citrus chinensis), coffee, rice, Chinese laurel, hawthorn, white lily, peony, tea, beech, hops, mocca, saxifrage, althea, angelica tree, arnica, inchinko, nettle, Phellodendron amplexicaule (Philippines), Hypericum perforatum, honeysuckle, and salvia (sage). ), Lithospermum root, Japanese white birch, Soapberry, Astragalus sieboldii, Ginkgo biloba, Barley, Swertia japonica, Jujube, Rosemary, Coptis japonica, Grapefruit, Gentiana, Soapwort, Calamus, Rehmannia Root, Cnidium officinalis, Mallow, Hamamelis, Coltsfoot, Prune, Lily of the valley, Horse chestnut, Quince, Uva-ursi leaf, etc. By incorporating plant extracts, moisturizing effects, cell activation effects, skin whitening effects, anti-inflammatory effects, active oxygen scavenging effects, blood circulation promoting effects, etc. can be imparted. (Note that the names of the plants, herbal medicine names, etc. are written in parentheses.)

[0037] Examples of antibacterial agents include benzoic acid, sodium benzoate, paraoxybenzoic acid esters, parachlormetacresol, benzalkonium chloride, phenoxyethanol, isopropylmethylphenol, alcohols, etc. By incorporating these, pigmentation caused by bacterial skin inflammation can be suppressed and a high anti-aging effect can be exhibited.

[0038] Examples of antibacterial alcohols include methanol, ethanol, propanol, isopropanol, butanol, isobutanol, tertiary butanol, 1,3-butylene glycol, 1,2-pentanediol (pentylene glycol), 1,2-hexanediol, 1,2-octanediol, benzyl alcohol, phenylethanol, phenylpropanol, phenylbutanol, phenylpentanol, phenylhexanol, and phenoxyethanol.

[0039] A preferred antimicrobial agent is 1,2-pentanediol (pentylene glycol).

[0040] Examples of preservatives include butylparaben and methylparaben.

[0041] The active oxygen remover is used for the purpose of suppressing the generation of lipid peroxides caused by ultraviolet rays, and examples of such agents include superoxide dismutase, mannitol, quercetin, catechin and its derivatives, vitamin B such as thiamines (thiamine hydrochloride, thiamine sulfate), riboflavins (riboflavin, riboflavin acetate, etc.), pyridoxines (pyridoxine hydrochloride, pyridoxine dioctanoate, etc.), and nicotinic acids (nicotinamide, benzyl nicotinate, etc.); dibutylhydroxytoluene, butylhydroxyanisole, etc. By incorporating these active oxygen removers, dullness can be suppressed and a higher anti-aging effect can be achieved.

[0042] Blood circulation promoters are used to promote the excretion of melanin by promoting blood flow in the skin, and examples of such agents include capsicum tincture and γ-oryzanol, while enzymes include lipase and papain. By incorporating these agents, an even higher anti-aging effect can be achieved.

[0043] Examples of whitening agents include vitamin C and its derivatives (L-ascorbic acid phosphate, L-ascorbic acid sulfate, L-ascorbyl dipalmitate, L-ascorbyl tetraisopalmitate, etc.), glabridin, glabrene, liquiritin, isoliquiritin, and licorice extracts containing these.

[0044] Antioxidants include vitamin E (tocopherol) and its derivatives (tocopherols and their derivatives such as dl-α (β, γ)-tocopherol, dl-α-tocopherol acetate, dl-α-tocopherol nicotinate, dl-α-tocopherol linoleate, dl-α-tocopherol succinate, ubiquinones, etc.), vitamin D and its derivatives (ergocalciferol, cholecalciferol, dihydroxystannal, etc.), rutin and its derivatives, thiotaurine, taurine, hydroquinone and its derivatives, histidine, catechin and its derivatives, etc.

[0045] Anti-inflammatory agents include glycyrrhizic acid and its derivatives, glycyrrhetinic acid and its derivatives, and the like.

[0046] Examples of ultraviolet protection agents include 2-ethylhexyl paramethoxycinnamate, oxybenzone, 4-tert-butyl-4'-methoxydibenzoylmethane, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, sodium 2-hydroxy-4-methoxybenzophenone-5-sulfonate, sodium 2-hydroxy-4-methoxybenzophenone-5-sulfate, sodium 2-phenylbenzimidazole sulfate, titanium oxide, zinc oxide, etc. Also, a fine powder is more effective.

[0047] Examples of keratolytic agents include salicylic acid, sulfur, resorcin, selenium sulfide, pyridoxine, etc. Examples of cooling agents include menthol, methyl salicylate, etc. Examples of astringents include citric acid, tartaric acid, lactic acid, aluminum potassium sulfate, tannic acid, etc.

[0048] The fragrances include natural fragrances and synthetic fragrances. The natural fragrances include plant fragrances separated from flowers, leaves, wood, peels, etc., and animal fragrances such as musk and civet. The synthetic fragrances include hydrocarbons such as monoterpenes, alcohols such as aliphatic alcohols and aromatic alcohols, aldehydes such as terpene aldehydes and aromatic aldehydes, ketones such as alicyclic ketones, esters such as terpene esters, lactones, phenols, oxides, nitrogen-containing compounds, and acetals.

[0049] The balance of the skin cleansing composition of the present invention is preferably water.

[0050] The skin cleansing composition of the present invention is preferably made of raw materials derived from natural products, and more preferably all components of the skin cleansing composition of the present invention are derived from natural products. In the present invention, the term "natural product" refers to any synthetic substance produced by chemical synthesis, and includes plants and animals that exist in nature without human intervention, as well as artificially cultivated plants and farmed animals. In addition, the term "natural product-derived" refers to the natural product itself, as well as substances produced from natural products and substances obtained by extracting some of the components that constitute natural products.

[0051] The skin cleansing composition of the present invention is preferably discharged in a foamed state from a foamer container and used. The foamer container is not particularly limited as long as it can mix the skin cleansing composition of the present invention with air and discharge it in a foamed state, and can be appropriately selected depending on the purpose. For example, a foamer container capable of discharging foam by depressing a pump part can be mentioned.

[0052] The former container usually has a porous membrane for forming foam, and the skin cleansing composition in the former container passes through the porous membrane to form foam. Examples of the material of the porous membrane include plastic materials such as nylon, polyester, and polyolefin. The mesh of the porous membrane is preferably 100 mesh to 400 mesh in terms of ease of pushing the pump of the former container in a low-temperature environment and fineness of the foam. If the mesh of the porous membrane is less than 100 mesh, the fineness of the foam may be insufficient, and if it exceeds 400 mesh, it may be difficult to push the pump of the former container in a low-temperature environment.

[0053] From the viewpoints of ease of pushing the pump of the foamer container in a low-temperature environment and fineness of the foam, the number of the porous membrane bodies is preferably 2 to 4. If the number of the porous membrane bodies is less than 2, the fineness of the foam may be insufficient, and if the number of the porous membrane bodies is more than 4, the pump of the foamer container in a low-temperature environment may become difficult to push. EXAMPLES

[0054] The present invention will be described in detail below with reference to examples. However, the present invention is not limited to the following examples, and all modifications and embodiments that do not deviate from the spirit of the present invention are included within the scope of the present invention.

[0055] [Preparation of skin cleansing composition] Skin cleansing compositions No. 1 to No. 7 were prepared by blending the raw materials shown in Table 1. All of the components used in the skin cleansing composition of the present invention are derived from natural products. The evaluation results of the obtained skin cleansing compositions are also shown in Table 1. The remainder of the skin cleansing composition contains purified water and several additives (such as plant extracts, moisturizers, and whitening agents) in a total amount of 0.3% by mass or less.

[0056] [Table 1]

[0057] The raw materials used are as follows: Lauramidopropyl hydroxysultaine: derived from palm oil and coconut oil Lauramidopropyl Betaine: Derived from coconut oil and palm oil, Cocamidopropyl Betaine: derived from coconut oil and palm kernel Decyl glucoside: derived from palm oil, palm kernel oil, coconut oil, corn, etc. Glycerin: derived from coconut oil and palm oil Pentylene glycol: derived from corn and sugar cane Hydroxyethyl cellulose: derived from pulp Citric acid: derived from sweet potato starch meal, tapioca starch meal, rice bran, etc.

[0058] The obtained skin cleansing compositions No. 1 to No. 7 were placed in a Biore U foamer pump manufactured by Kao Corporation, and evaluated for foaming properties.

[0059] (Foaming during dispensing) Judgment criteria Good: There is a lot of foam when it comes out and it maintains its shape when it comes out. △: A large amount of foam comes out, but the foam collapses where it touches the palm of your hand. ×: The amount of foam that comes out is small, it is watery, and the foam collapses quickly.

[0060] (Fineness of bubbles when ejected) Judgment criteria 〇: Detailed △: Fine ×: Large bubbles are also seen

[0061] (Foam shape retention (soft and chewy)) Judgment criteria 〇: When you touch the foam with your hand, it feels elastic. △: When the foam is touched with the hand, it has no elasticity and breaks easily. ×: When the foam is stretched by hand, the foam disappears easily.

[0062] (Easy to wash off foam) Judgment criteria 〇: Can be washed off with running water within 15 seconds. △: Can be washed off with running water in 15 to 30 seconds. ×: It takes more than 30 seconds to rinse off with running water.

[0063] (Feeling of use) Judgment criteria 〇: After washing, there is a feeling of moisture after wiping off the moisture with a towel. △: After washing, there is no moisturizing feeling after wiping off the moisture with a towel. ×: After washing, there is a slimy feeling after wiping off the moisture with a towel.

[0064] The skin cleansing composition No. 7 of the present invention was compared with commercially available foam-type soap. The following commercially available products were used:

[0065] Commercially available product A: Hand soap containing the following ingredients Isopropyl methylphenol, water, polyoxyethylene lauryl ether sulfate, ammonium (1E.O.) solution, PG, ethanol, PEG6000, POE lauryl ether acetate, glycerin ethylhexyl ether, acrylamide-acrylic acid-dimethyl diallyl ammonium chloride copolymer, trimethylammonio hydroxypropyl hydroxyethyl cellulose chloride, edetate, lactic acid, sodium hydroxide solution, benzoate, fragrance

[0066] Commercially available product B: Foam soap for delicate areas containing the following ingredients Conazole nitrate, isopropyl methylphenol, PG, BG, concentrated glycerin, alkyl carboxymethyl hydroxyethyl imidazolinium betaine, sodium lauroyl methyl-β-alanine solution, coconut oil fatty acid diethanolamide, anhydrous citric acid, monosodium succinate, phenoxyethanol, water

[0067] Commercially available product C: Foam soap for delicate areas containing the following ingredients Water, DPG, TEA-Cocoyl Glutamate, Pentylene Glycol, Lauryl Betaine, Cocamide DEA, Polyglyceryl-10 Laurate, Caprylyl Glycol, Sodium Hyaluronate, Hydrolyzed Collagen, Glycerin, Laurel Leaf Oil, Limonene Fruit Oil, Ylang-Ylang Flower Oil, Pencil Juniper Oil, Orange Peel Oil, Turpentine, Pelargonium Graveolens Oil, Palmarosa Oil, Bitter Orange Leaf / Twig Oil, Hinoki Oil, Vetiver Root Oil, Bergamot Fruit Oil, Origanum Majorana Leaf Oil, Eucalyptus Leaf Oil, Yuzu Peel Oil, Lime Oil, Lavandula Hybrida Oil, Citric Acid, Saxifraga Extract, Grape Extract, BG, Yamaguwa Root Bark Extract, Scutellaria Baicalensis Extract, Calendula Officinalis Flower Extract, Arginine, Sodium Citrate, Caprylhydroxamic Acid, Tetrasodium Etidronate, Disodium EDTA, Phenoxyethanol

[0068] Using skin cleansing composition No. 7 and commercial products A to C, 80 mL of each cleansing agent was placed in an FII-100PE container (volume 100 mL) equipped with an FII foamer pump manufactured by GLASEL Co., Ltd., and foaming properties were compared.

[0069] (Foaming ability) 15 pumps were applied to a 200mL transparent container and the height of the foam immediately after was compared. In terms of foaming ability, skin cleansing composition No. 7 of the present invention was superior in the order below. Skin cleansing composition No. 7 of the present invention>Commercial product B, Commercial product C>Commercial product A

[0070] (Fineness of foam) 15 pumps were applied to a 200 mL transparent container, and the fineness of the foam immediately after application was evaluated visually. The fineness of the foam is in the following order, with skin cleansing composition No. 7 of the present invention having finer foam and being superior. Skin cleansing composition of the present invention No. 7>Commercial product A>Commercial products B and C

[0071] (Foam shape retention time) 15 pumps were placed into a 200mL transparent container and the shape of the foam after 30 minutes was compared. The foam shape retention time was in the following order: Skin cleansing composition No. 7 of the present invention maintained its foam shape and was excellent. Skin cleansing composition No. 7 of the present invention, commercial product A>commercial product C>commercial product B

[0072] From the results in Table 1 and the comparison with commercially available products, it can be seen that the skin cleansing composition of the present invention, which contains lauramidopropyl hydroxysultaine, lauramidopropyl betaine, and decyl glucoside and has a pH of 4.0 to 6.0, is low-irritation, has excellent foaming properties, and provides an excellent feel after cleansing. [Industrial Applicability]

[0073] The present invention is useful as a skin cleansing composition, and is particularly useful for cleansing women's delicate areas.

Claims

1. Lauramidopropyl Hydroxysultaine Lauramidopropyl Betaine A skin cleansing composition comprising decyl glucoside and having a pH of 4.0 to 6.

0.

2. 2. The skin cleansing composition according to claim 1, having a pH of 4.0 to 4.

5.

3. 2. The skin cleansing composition according to claim 1, wherein the content of lauramidopropyl hydroxysultaine is 3% by mass to 9% by mass.

4. 2. The skin cleansing composition according to claim 1, wherein the content of lauramidopropyl betaine is 0.7% by mass to 4.7% by mass.

5. 2. The skin cleansing composition according to claim 1, wherein the content of decyl glucoside is 0.5% by mass to 2.5% by mass.

6. The skin cleansing composition according to any one of claims 1 to 5, which is for use on the female genital area.

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