Cleansing agent

Abstract

[Problem] To provide a detergent capable of achieving excellent foam quality and foam persistency. [Solution] A detergent containing (a) a higher fatty acid or a salt thereof, (b) a first alkylene oxide derivative represented by general formula (1), and (c) a second alkylene oxide derivative represented by general formula (2). (1): R1-[(AO)m(EO)n]-R2. (2): R3-[(AO')o(EO)p]-R4.

Description

[Technical field]

[0001] The present invention relates to a cleansing agent. [Background technology]

[0002] In view of cleaning performance and foaming properties, higher fatty acid soaps are generally blended into cleansing agents used for face washing, etc. In order to further improve cleaning performance, blending of alkylene oxide derivatives into higher fatty acid soaps has also been considered.

[0003] In addition to high cleansing power, cleansers are also required to have a mild feel when used and to have a mild effect on the skin. For example, efforts are being made to improve the quality and persistence of foam to reduce friction caused by direct contact between the skin and fingers during cleansing.

[0004] Patent Document 1 discloses a cleansing agent containing a higher fatty acid soap and an alkylene oxide derivative, but the foam quality and foam durability of the cleansing agent are insufficient, and further improvements to meet consumer needs are required. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4770187 Summary of the Invention

[0006] The present inventors have now surprisingly discovered that foam quality and foam persistence are significantly improved by blending two types of alkylene oxide derivatives, each having a specific structure, into a cleansing agent. The present invention is based on this discovery, and the problem to be solved by the present invention is to provide a cleansing agent that can achieve excellent foam quality and foam persistence.

[0007] According to the present invention, the following inventions are provided. [1] (a) a higher fatty acid or its salt; (b) a first alkylene oxide derivative represented by the following general formula (1): R 1 -[(AO) m (EO) n ]-R 2 (1) (c) a second alkylene oxide derivative represented by the following general formula (2): R 3 -[(AO') o (EO) p ]-R 4 (2) Including cleaning agents. (In the general formula (1), AO represents an oxyalkylene group having 3 to 4 carbon atoms, EO represents an oxyethylene group, m and n represent the average number of moles added of the oxyalkylene group having 3 to 4 carbon atoms and the oxyethylene group, respectively, and satisfy 1≦m≦70, 1≦n≦70, and m / n<1.00; R 1 and R 2 R represents a hydrocarbon group having 1 to 4 carbon atoms or a hydrogen atom, which may be the same or different, 1 and R 2 The ratio of the number of hydrogen atoms to the number of hydrocarbon groups is 0.15 or less, In the general formula (2), AO' represents an oxyalkylene group having 3 to 4 carbon atoms, EO represents an oxyethylene group, o and p represent the average number of moles of the oxyalkylene group having 3 to 4 carbon atoms and the oxyethylene group added, respectively, and satisfy 1≦o≦70, 1≦p≦70, and 1.00≦o / p; 3 and R 4 R represents a hydrocarbon group having 1 to 4 carbon atoms or a hydrogen atom, which may be the same or different, 3 and R 4 The ratio of the number of hydrogen atoms to the number of hydrocarbon groups is 0.15 or less. [2] The cleansing agent according to [1], wherein in the general formula (1) and the general formula (2), AO or AO' and EO are added randomly. [3] When the blending amount of the first alkylene oxide derivative (b) is X (mass%) and the blending amount of the second alkylene oxide derivative (c) is Y (mass%) with respect to the total mass of the cleaning agent, the cleaning agent according to [1] or [2], wherein X and Y satisfy 0.1 ≦ X / Y ≦ 30. [4] The cleaning agent according to [3], wherein X and Y satisfy 0.1 ≦ X / Y ≦ 20. [5] The cleaning agent according to any one of [1] to [4], wherein in the general formula (1), m and n satisfy m / n < 0.80, and in the general formula (2), o and p satisfy 1.05 ≦ o / p. [6] The cleaning agent according to any one of [1] to [5], wherein in the general formula (1), m and n satisfy m + n < 30, and in the general formula (2), o and p satisfy 30 < o + p. [7] The cleaning agent according to any one of [1] to [6], wherein the blending amount X of the first alkylene oxide derivative (b) is 0.1 to 5 mass% based on the total mass of the cleaning agent. [8] The cleaning agent according to any one of [1] to [7], wherein the blending amount Y of the second alkylene oxide derivative (c) is 0.005 to 5 mass% based on the total mass of the cleaning agent. [9] The cleaning agent according to any one of [1] to [8], further comprising (d) a polymer having a cationic group.

[10] The cleaning agent according to [9], wherein the polymer (d) having a cationic group is a copolymer containing a diallyldialkyl quaternary ammonium salt as a polymerization unit.

[11] The cleaning agent according to [9] or

[10] , wherein the polymer (d) having a cationic group is a copolymer containing a diallyldialkyl quaternary ammonium salt and acrylamide as polymerization units.

[12] The cleaning agent according to any one of [9] to

[11] , wherein the polymer (d) having a cationic group is a copolymer containing a diallyldialkyl quaternary ammonium salt, acrylamide, and acrylic acid as polymerization units.

[13] The cleansing agent according to any one of [9] to

[12] , wherein the blending amount of the polymer (d) having a cationic group is 0.01 to 1 mass % based on the total mass of the cleansing agent.

[14] (e) A cleansing agent according to any one of [1] to

[13] , further comprising highly polymerized polyethylene glycol having a weight-average molecular weight of 500,000 to 6,500,000.

[15] The cleansing agent according to

[14] , wherein the blending amount of the polyethylene glycol (e) is 0.001 to 0.1 mass % based on the total mass of the cleansing agent.

[16] The cleansing agent according to any one of [1] to

[15] , which is used as a facial cleanser.

[0008] The cleansing agent according to the present invention can generate foam with excellent quality and durability.

[0009] The cleansing agent according to the present invention comprises: (a) a higher fatty acid or a salt thereof, (b) a first alkylene oxide derivative represented by general formula (1), and (c) a second alkylene oxide derivative represented by general formula (2): It contains as an essential component.

[0010] [(a) Higher fatty acid or its salt] The higher fatty acid or its salt that can be used in the present invention is not particularly limited as long as it is a neutralized product of a higher fatty acid, or a saponified product of a higher fatty acid ester or oil that is generally used as a detergent material. What is generally called a higher fatty acid soap is a mixture of a higher fatty acid and its salt, and can be used as the higher fatty acid or its salt (a) in the present invention.

[0011] The higher fatty acid is preferably a fatty acid having 8 to 22 carbon atoms, and may be either linear or branched, and may be either saturated or unsaturated. Specifically, a fatty acid selected from the group consisting of lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, palmitoleic acid, oleic acid, isomyristic acid, isopalmitic acid, isostearic acid, undecylenic acid, tallic acid, linoleic acid, linoleic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) can be used. Here, it is preferable to use one or a combination of two or more fatty acids selected from the group consisting of lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, palmitoleic acid, oleic acid, isomyristic acid, isopalmitic acid, and isostearic acid.

[0012] Examples of alkalis that form salts of higher fatty acids include inorganic alkalis such as potassium hydroxide and sodium hydroxide, organic alkalis such as triethanolamine, and basic amino acids such as lysine and arginine. Of these alkalis, potassium hydroxide is preferred.

[0013] As the salt of a higher fatty acid, it is preferable to use a higher fatty acid salt selected from the group consisting of potassium laurate, potassium myristate, potassium palmitate, and potassium stearate, and it is also preferable to contain all four of these higher fatty acid salts.

[0014] The salt of a higher fatty acid is produced, for example, by neutralizing a higher fatty acid with an alkali, but generally, it is not completely neutralized, and the product generally contains unreacted higher fatty acid. The higher fatty acid soap that can be used in the present invention also preferably has a neutralization rate of 60 to 90 mol%. Therefore, in the present invention, the higher fatty acid or its salt (a) preferably contains 60 to 90 mol% of a higher fatty acid alkali salt and 10 to 40 mol% of a higher fatty acid. In particular, the higher fatty acid or its salt (a) more preferably contains about 80 mol% of a higher fatty acid alkali salt. The higher fatty acid or its salt (a) does not need to be a neutralized product of a higher fatty acid, and may be a mixture of a salt of a higher fatty acid and a higher fatty acid in the above ratio.

[0015] The amount of the higher fatty acid or its salt in the cleanser according to the present invention is not particularly limited, but is preferably 15 to 40 mass %, more preferably 20 to 38 mass %, based on the total mass of the cleanser. By setting the amount of the higher fatty acid or its salt in this range, the cleansing performance of the cleanser according to the present invention can be improved.

[0016] [(b) First alkylene oxide derivative] The first alkylene oxide derivative contained in the cleansing agent according to the present invention is represented by the following general formula (1). R 1 -[(AO) m (EO) n ]-R 2 (1)

[0017] In the general formula (1), AO represents an oxyalkylene group having 3 to 4 carbon atoms, such as an oxypropylene group, an oxybutylene group, an oxyisobutene group, a trimethylene group, or a tetramethylene group. Among these, an oxypropylene group or an oxybutylene group is preferred. EO represents an oxyethylene group. The oxyalkylene groups having 3 to 4 carbon atoms and the oxyethylene groups may be added in a block or random manner, but are preferably added in a random manner. Here, the block manner includes not only two-stage blocks but also three-stage blocks.

[0018] In the general formula (1), m and n respectively represent the average number of moles added of an oxyalkylene group having 3 to 4 carbon atoms and an oxyethylene group, and satisfy 1≦m≦70, 1≦n≦70, and m / n<1.00. Preferably, m and n satisfy 5≦m≦45 and 12≦n≦40. Also, preferably, m and n satisfy m / n<0.80. Furthermore, preferably, m and n satisfy m+n<30, and more preferably, m+n<25. By satisfying these, the foam quality, specifically, the creaminess and persistence of the foam, can be further improved.

[0019] R 1 and R 2 may be the same type, may be a mixture of a hydrocarbon group having 1 to 4 carbon atoms and a hydrogen atom, or may be a mixture of different hydrocarbon groups having 1 to 4 carbon atoms. 1 and R 2 In the hydrocarbon group, the ratio of the number of hydrogen atoms to the number of hydrocarbon groups (number of hydrogen atoms / number of hydrocarbon groups) is 0.15 or less, and preferably 0.06 or less. 1 and R 2 may be hydrogen, but the proportion of hydrogen is preferably small. 1 and R 2 It is preferable that all of the groups are hydrocarbon groups.

[0020] Specific examples of alkylene oxide derivatives satisfying the general formula (1) include: Polyoxyethylene (9 moles) polyoxypropylene (2 moles) dimethyl ether, Polyoxyethylene (14 mol) polyoxypropylene (7 mol) dimethyl ether, Polyoxyethylene (15 mol) polyoxypropylene (5 mol) dimethyl ether, Polyoxyethylene (9 moles) polyoxybutylene (2 moles) dimethyl ether, and Polyoxyethylene (14 mol) Polyoxybutylene (7 mol) Dimethyl Ether etc. Among these, from the viewpoints of creaminess of the foam and foam durability, polyoxyethylene (9 mol) polyoxypropylene (2 mol) dimethyl ether, polyoxyethylene (14 mol) polyoxypropylene (7 mol) dimethyl ether, and polyoxyethylene (15 mol) polyoxypropylene (5 mol) dimethyl ether are preferred.

[0021] The amount of the first alkylene oxide derivative in the cleansing agent according to the present invention is not particularly limited, but is preferably 0.1 to 5 mass %, more preferably 0.15 to 3 mass %, based on the total mass of the cleansing agent. By setting the amount of the first alkylene oxide derivative in this range, the creaminess and persistence of the foam can be further improved.

[0022] [(c) Second alkylene oxide derivative] The second alkylene oxide derivative contained in the cleansing agent according to the present invention is different from the above-mentioned first alkylene oxide derivative and is represented by the following general formula (2). R 3 -[(AO') o (EO) p ]-R 4 (2)

[0023] In the general formula (2), AO' represents an oxyalkylene group having 3 to 4 carbon atoms, such as an oxypropylene group, an oxybutylene group, an oxyisobutene group, a trimethylene group, and a tetramethylene group. Among these, an oxypropylene group or an oxybutylene group is preferable. EO represents an oxyethylene group. In addition, the C3-C4 oxyalkylene group and the oxyethylene group may be added in a block form or in a random form, but preferably they are added in a random form. Here, the block form includes not only a two-stage block but also a three-stage block.

[0024] In the general formula (2), o and p respectively represent the average number of moles of addition of the C3-C4 oxyalkylene group and the oxyethylene group, and satisfy 1 ≦ o ≦ 70, 1 ≦ p ≦ 70, and 1.00 ≦ o / p. Preferably, o and p satisfy 5 ≦ o ≦ 45 and 12 ≦ p ≦ 40. Also preferably, o and p satisfy 1.05 ≦ o / p. Further preferably, m and n satisfy 30 < o + p, and more preferably, 50 < o + p. By satisfying these conditions, the creaminess of the foam and the foam persistence can be further improved.

[0025] R 3 and R 4 may each be of the same kind, or a hydrocarbon group having 1 to 4 carbon atoms and a hydrogen atom may be mixed, or different hydrocarbon groups having 1 to 4 carbon atoms may be mixed. However, among the hydrocarbon groups of R 3 and R 4 , the ratio of the presence of the hydrocarbon group to the hydrogen atom is such that the ratio of the number of hydrogen atoms to the number of hydrocarbon groups (number of hydrogen atoms / number of hydrocarbon groups) is 0.15 or less, preferably 0.06 or less. That is, R 3 and R 4 may be hydrogen, but the ratio is preferably small, and it is preferable that R 3 and R 4 are all hydrocarbon groups.

[0026] Specific alkylene oxide derivatives satisfying the general formula (2) include polyoxyethylene (10 moles) polyoxypropylene (10 moles) dimethyl ether, polyoxyethylene (36 moles) polyoxypropylene (41 moles) dimethyl ether, polyoxyethylene (6 moles) polyoxypropylene (14 moles) dimethyl ether, Polyoxyethylene (25 mol) polyoxypropylene (25 mol) dimethyl ether, Polyoxyethylene (10 mol) polyoxypropylene (10 mol) diethyl ether, Polyoxyethylene (10 mol) polyoxypropylene (10 mol) dipropyl ether, Polyoxyethylene (10 mol) polyoxypropylene (10 mol) dibutyl ether, Polyoxyethylene (36 mol) polyoxypropylene (41 mol) diethyl ether, Polyoxyethylene (36 moles) polyoxypropylene (41 moles) dipropyl ether, and Polyoxyethylene (36 mol) Polyoxypropylene (41 mol) Dibutyl ether etc. Among these, from the viewpoints of creaminess of the foam and foam durability, polyoxyethylene (36 mol) polyoxypropylene (41 mol) dimethyl ether or polyoxyethylene (6 mol) polyoxypropylene (14 mol) dimethyl ether is preferred.

[0027] The amount of the second alkylene oxide derivative in the cleansing agent according to the present invention is not particularly limited, but is preferably 0.005 to 5 mass %, more preferably 0.01 to 3 mass %, based on the total mass of the cleansing agent. By setting the amount of the second alkylene oxide derivative in this range, the creaminess and persistence of the foam can be further improved.

[0028] In the cleansing agent according to the present invention, the blending amounts of the first and second alkylene oxide derivatives preferably satisfy a specific ratio. Specifically, when the blending amount of the first alkylene oxide derivative (b) relative to the total mass of the cleansing agent is X (mass%) and the blending amount of the second alkylene oxide derivative (c) is Y (mass%), X and Y preferably satisfy 0.1≦X / Y≦30, and more preferably 0.1≦X / Y≦20. By setting the ratio of the blending amount of the first alkylene oxide derivative (b) to the blending amount of the second alkylene oxide derivative (c) within the above numerical range, the creaminess and persistence of the foam can be further improved.

[0029] [(d) Polymer having a cationic group] In one embodiment, the cleansing agent according to the present invention further comprises a polymer having a cationic group. By including a polymer having a cationic group in the cleansing agent, the foaming property, foam persistence, and moisturizing property of the cleansing agent can be improved.

[0030] The cationic group-containing polymer that can be used in the cleansing agent according to the present invention is not particularly limited, but is preferably a hydrophilic polymer having an amino group or a quaternary ammonium group. Examples of such polymers include those in which a substituent having an amino group or a quaternary ammonium group is added to a hydrophilic polymer such as cellulose, and copolymers containing, as polymerization units, acrylamide or diallyldialkyl quaternary ammonium salt having a cationic group in the side chain. Among these, copolymers containing a diallyldialkyl quaternary ammonium salt in the polymerization units are preferred, copolymers containing a diallyldialkyl quaternary ammonium salt and acrylamide in the polymerization units are more preferred, and copolymers containing a diallyldialkyl quaternary ammonium salt and acrylamide and acrylic acid in the polymerization units are even more preferred.

[0031] Specifically, cationic cellulose, cationic starch, diallyldialkyl quaternary ammonium salt / acrylamide copolymer, and diallyldialkyl quaternary ammonium salt / acrylamide / acrylic acid copolymer are mentioned. Among these, diallyldialkyl quaternary ammonium salt / acrylamide copolymer or diallyldialkyl quaternary ammonium salt / acrylamide / acrylic acid copolymer is preferred, and diallyldialkyl quaternary ammonium salt / acrylamide / acrylic acid copolymer is more preferred. In the present invention, the polymer having a cationic group is required to have a cationic group, but the polymer itself is not required to be a cationic polymer. Rather, in the present invention, there is a tendency that better effects can be obtained by using an amphoteric polymer such as a diallyldialkyl quaternary ammonium salt / acrylamide / acrylic acid copolymer.

[0032] In addition, the cationic group-containing polymer in the present invention is preferably one having low spinnability. Such a cationic group-containing polymer is considered to have an effect of improving the water solubility, facilitating the diffusion of the cleansing agent into water when the cleansing agent comes into contact with water.

[0033] Commercially available cationic polymers which may be included in the cleaning agent of the present invention include, for example: Marcoat 100 (product name: manufactured by Nalco, cosmetic label name: Polyquaternium-6), Marcoat 550 (product name: manufactured by Nalco, cosmetic label name: Polyquaternium-7), Marcoat 2200 (product name: manufactured by Nalco, cosmetic label name: Polyquaternium-7), Marcoat 3330 (product name: Nalco, cosmetic label name: Polyquaternium-39) etc.

[0034] The amount of the cationic group-containing polymer in the cleanser according to the present invention is not particularly limited, but is preferably 0.01 to 1 mass %, more preferably 0.02 to 0.8 mass %, based on the total mass of the cleanser. By setting the amount of the cationic group-containing polymer in this range, the foaming property, foam persistence and moisturizing property of the cleanser according to the present invention can be further improved.

[0035] [(e) Highly polymerized polyethylene glycol] In one embodiment, the cleansing agent according to the present invention further comprises highly polymerized polyethylene glycol. By including highly polymerized polyethylene glycol in the cleansing agent, the creaminess and smoothness of the foam can be improved.

[0036] The weight average molecular weight of the highly polymerized polyethylene glycol is 500,000 to 6,500,000, and preferably 1,000,000 to 5,000,000. The weight average molecular weight means a value measured by gel permeation chromatography using polystyrene as a standard substance, and is measured by a method in accordance with JIS K 7252-1.

[0037] The amount of highly polymerized polyethylene glycol in the cleansing agent according to the present invention is not particularly limited, but is preferably 0.001 to 0.1% by mass, more preferably 0.003 to 0.05% by mass, based on the total mass of the cleansing agent. By setting the amount of highly polymerized polyethylene glycol in this range, it is possible to improve the creaminess and smoothness of the foam.

[0038] [Other additives] The cleansing agent according to the present invention may contain various additives (other additives) as necessary, in addition to the above-mentioned components (a) to (e). Examples of other additives include anionic surfactants other than salts of higher fatty acids, nonionic surfactants, amphoteric surfactants, cationic surfactants, moisturizing agents, polymers, thickeners, oily components, aqueous solvents, cooling agents, chelating agents, stabilizers, usability improvers, powder components, pH adjusters, inorganic salts, film-forming agents, ultraviolet absorbers, metal ion sequestering agents, amino acids, organic amino acids, polymer emulsions, vitamins, antioxidants, fragrances, etc.

[0039] The anionic surfactant other than the higher fatty acid salt that can be used in the cleansing agent according to the present invention is Polyoxyethylene alkyl sulfate surfactants and alkyl glycol acetates (sodium lauryl glycol acetate), Higher alkyl sulfates (e.g., sodium lauryl sulfate, potassium lauryl sulfate, etc.); N-acyl sarcosinates (e.g., sodium lauroyl sarcosinate, etc.); Higher fatty acid amidosulfonates (e.g., sodium N-myristoyl-N-methyl taurate, sodium coconut oil fatty acid methyl taurate (sodium cocoyl methyl taurate), sodium lauryl methyl tauride etc.); Phosphate ester salts (sodium POE-oleyl ether phosphate, POE-stearyl ether phosphate, etc.); Sulfosuccinates (e.g., sodium di-2-ethylhexyl sulfosuccinate, sodium monolauroyl monoethanolamide polyoxyethylene sulfosuccinate, sodium lauryl polypropylene glycol sulfosuccinate, etc.); Alkylbenzenesulfonates (e.g., sodium linear dodecylbenzenesulfonate, triethanolamine linear dodecylbenzenesulfonate, linear dodecylbenzenesulfonic acid, etc.); Higher fatty acid ester sulfates (e.g., sodium hydrogenated coconut oil fatty acid glycerin sulfate, etc.); N-acyl glutamates (e.g., monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, monosodium N-myristoyl-L-glutamate, etc.); Sulfated oils (e.g., turmeric oil, etc.); POE-Alkyl ether carboxylic acids; POE-alkyl allyl ether carboxylates; α-Olefin sulfonates; Higher fatty acid ester sulfonates; Secondary alcohol sulfates; Higher fatty acid alkylolamide sulfate ester salts; Sodium Lauroyl Monoethanolamide Succinate; N-Palmitoyl aspartic acid ditriethanolamine; Sodium caseinate etc.

[0040] When the cleansing agent according to the present invention contains the above-mentioned anionic surfactant other than the salt of a higher fatty acid, the blending amount thereof is preferably 0.1 to 3 mass %, more preferably 0.2 to 2 mass %, based on the total mass of the cleansing agent.

[0041] Examples of nonionic surfactants that can be used in the cleansing agent according to the present invention include: Fatty acid alkanolamides such as coconut oil fatty acid monoethanolamide, coconut oil fatty acid diethanolamide, lauric acid isopropanolamide, and oleic acid diethanolamide; Sorbitan fatty acid esters such as sorbitan monostearate and sorbitan sesquioleate; Alkylene glycol fatty acid esters such as diethylene glycol laurate, propylene glycol laurate, ethylene glycol monooleate, and ethylene glycol distearate; Hydrogenated castor oil derivatives, glycerin alkyl ethers, POE sorbitan fatty acid esters such as POE sorbitan monooleate and polyoxyethylene sorbitan monostearate; POE sorbitol fatty acid esters such as POE sorbitol monolaurate; POE glycerin fatty acid esters such as POE glycerin monoisostearate; POE glycerin fatty acid esters such as polyethylene glycol monooleate and POE distearate; POE alkyl ethers such as POE-octyldodecyl ether; POE alkyl phenyl ethers such as POE nonyl phenyl ether; POE·POP alkyl ethers; Pluronic types; POE castor oil; POE hydrogenated castor oil derivatives; Sugars such as sugar esters, sugar ethers, and sugar amides; and Alkyl glycosides Among these, one or more types may be used in combination. In particular, alkylene glycol fatty acid esters are preferred, and diethylene glycol laurate is more preferred.

[0042] When the cleansing agent according to the present invention contains a nonionic surfactant, the blending amount thereof is preferably from 1 to 7 mass %, more preferably from 2 to 6 mass %, based on the total mass of the cleansing agent.

[0043] The amphoteric surfactant that can be used in the cleansing agent according to the present invention is not particularly limited, and examples thereof include: Imidazoline-based amphoteric surfactants (e.g., 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.); and Betaine surfactants (e.g., 2-heptadecyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lauryl dimethylaminoacetic acid betaine, alkyl betaine, amido betaine, sulfo betaine, cocamidopropyl betaine, etc.) and the like, and preferred are betaine-based surfactants.

[0044] When the cleansing agent according to the present invention contains an amphoteric surfactant, the amount thereof is preferably 0.5 to 3 mass %, more preferably 0.7 to 2 mass %, based on the total mass of the cleansing agent.

[0045] The cationic surfactant that can be used in the cleansing agent according to the present invention is not particularly limited, and examples thereof include: Alkyltrimethylammonium salts (e.g., stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); Alkylpyridinium salts (e.g., cetylpyridinium chloride, etc.); Distearyldimethylammonium chloride, dialkyldimethylammonium salt; Poly(N,N'-dimethyl-3,5-methylenepiperidinium chloride); Alkyl quaternary ammonium salts;Alkyl dimethyl benzyl ammonium salts; Alkylisoquinolinium salts; Dialkyl morphonium salts; POE-alkylamines; Alkylamine salts; Polyamine fatty acid derivatives; Amyl alcohol fatty acid derivatives; Benzalkonium chloride; and Benzethonium chloride etc.

[0046] Moisturizers that can be used in the cleansing agent according to the present invention are not particularly limited, and examples thereof include polyethylene glycol, propylene glycol, dipropylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerol (EO)PO adduct, Rosa rugosa extract, Achillea millefolium extract, and Melilot extract.

[0047] The polymers that can be used in the cleansing agent according to the present invention may be natural, semi-synthetic or synthetic, and may be water-soluble or water-insoluble. Examples of natural polymers include: Plant-based polymers (e.g., gum arabic, gum tragacanth, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed, algae colloids (cassou extract), starch (rice, corn, potato, wheat), glycyrrhizic acid); Microbial polymers (e.g., xanthan gum, dextran, succinoglucan, pullulan, etc.); and Animal polymers (e.g., collagen, casein, albumin, gelatin, etc.) etc. Examples of semi-synthetic polymers include: Starch-based polymers (e.g., carboxymethyl starch, methylhydroxypropyl starch, etc.); Cellulosic polymers (methyl cellulose, ethyl cellulose, methylhydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder, etc.); and Alginic acid polymers (e.g., sodium alginate, propylene glycol alginate, etc.) etc. Examples of synthetic polymers include vinyl polymers (e.g., polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, carboxyvinyl polymers, etc.); Polyoxyethylene polymers (e.g., polyoxyethylene polyoxypropylene copolymers of polyethylene glycol 20,000, 40,000, and 60,000); Acrylic polymers (e.g., sodium polyacrylate, polyethyl acrylate, polyacrylamide, etc.); and Polyethyleneimine; Cationic Polymer etc.

[0048] Examples of thickeners that can be used in the cleansing agent according to the present invention include gum arabic, carrageenan, karaya gum, tragacanth gum, carob gum, quince seed, casein, dextrin, gelatin, sodium pectinate, sodium alginate, methylcellulose, ethylcellulose, carboxymethylcellulose (CMC), hydroxyethylcellulose, hydroxypropylcellulose, polyvinyl alcohol (PVA), polyvinyl methyl ether (PVM), polyvinylpyrrolidone (PVP), sodium polyacrylate, carboxyvinyl polymer, locust bean gum, guar gum, tamarind gum, dialkyldimethylammonium cellulose sulfate, xanthan gum, magnesium aluminum silicate, bentonite, hectorite, laponite, silicic anhydride, taurate-based polymers, and synthetic acrylate-based polymers.

[0049] The oily components that can be used in the cleansing agent according to the present invention include liquid oils and fats, solid oils and fats, waxes, hydrocarbons, high-flow alcohols, synthetic ester oils, silicone oils, and the like.

[0050] Examples of liquid oils and fats include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, germ oil, and triglycerin.

[0051] Examples of solid fats and oils include cacao butter, coconut oil, horse tallow, hardened coconut oil, palm oil, beef tallow, mutton tallow, hardened beef tallow, palm kernel oil, lard, beef bone fat, Japan Rice Kernel Oil, hardened oil, beef foot fat, Japan Rice, and hardened castor oil.

[0052] Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ivory wax, whale wax, montan wax, bran wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, and POE hydrogenated lanolin alcohol ether.

[0053] Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, and microcrystalline wax.

[0054] Examples of higher alcohols include: Straight chain alcohols (e.g., lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, and cetostearyl alcohol); and Branched chain alcohols (such as monostearyl glycerin ether (batyl alcohol), 2-decyltetradecyl alcohol, lanolin alcohol, cholesterol, phytosterols, hexyldodecanol, isostearyl alcohol, and octyldodecanol) etc.

[0055] Synthetic ester oils include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, Glyceryl tri-2-ethylhexanoate, glyceryl trioctanoate, glyceryl triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, tri-2-heptylundecanoate glyceride, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylun palmitate decyl, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, and triethyl citrate.

[0056] Examples of silicone oils include chain polysiloxanes (e.g., dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxanes (e.g., octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc.), silicone resins that form a three-dimensional network structure, silicone rubber, and various modified polysiloxanes (amino-modified polysiloxanes, polyether-modified polysiloxanes, alkyl-modified polysiloxanes, fluorine-modified polysiloxanes, etc.).

[0057] Aqueous solvents can include, for example, water, alcohol, or mixtures thereof.

[0058] As the water, water used in cosmetics, quasi-drugs, etc. can be used, for example, purified water, ion-exchanged water, tap water, etc.

[0059] The alcohol may be, for example, at least one selected from lower alcohols, polyhydric alcohols, polyhydric alcohol copolymers, dihydric alcohol alkyl ethers, dihydric alcohol ether esters, glycerin monoalkyl ethers, sugar alcohols, monosaccharides, oligosaccharides, polysaccharides, and derivatives thereof.

[0060] Examples of lower alcohols include ethanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol.

[0061] Examples of polyhydric alcohols include dihydric alcohols (e.g., ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, and octylene glycol, etc.); Trihydric alcohols (e.g., glycerin, trimethylolpropane, etc.); Tetrahydric alcohols (e.g., pentaerythritol, 1,2,6-hexanetriol, etc.); Pentahydric alcohols (e.g., xylitol, etc.); Hexahydric alcohols (e.g., sorbitol, mannitol, etc.); Polyhydric alcohol polymers (e.g., diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, polyglycerin, and the like); dihydric alcohol alkyl ethers (e.g., ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono 2-methylhexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, and ethylene glycol dibutyl ether, etc.); dihydric alcohol alkyl ethers (e.g., diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol butyl ether, diethylene glycol methyl ethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol isopropyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, and dipropylene glycol butyl ether); dihydric alcohol ether esters (e.g., ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol diadipate, ethylene glycol disuccinate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, and propylene glycol monophenyl ether acetate, etc.); Glycerol monoalkyl ethers (e.g., xyl alcohol, selachyl alcohol, batyl alcohol, etc.); Sugar alcohols (e.g., sorbitol, maltitol, maltotriose, mannitol, sucrose, erythritol, glucose, fructose, starch hydrolysates, maltose, xylitol, and starch hydrolysates reducing alcohols, etc.); Grisolid; Tetrahydrofurfuryl alcohol; POE-Tetrahydrofurfuryl alcohol; POP-butyl ether; POP·POE-Butyl Ether; Tripolyoxypropylene glycerin ether; POP-glycerol ether; POP-glycerol ether phosphate; POP·POE-Pentane erythritol ether, and Polyglycerin etc.

[0062] Examples of monosaccharides include: Tricarbon sugars (e.g., D-glyceryl aldehyde, and dihydroxyacetone); Four-carbon sugars (e.g., D-erythrose, D-erythrulose, D-threose, and erythritol); pentoses (e.g., L-arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-ribulose, D-xylulose, and L-xylulose); Hexose sugars (e.g., D-glucose, D-talose, D-busicose, D-galactose, D-fructose, L-galactose, L-mannose, and D-tagatose, etc.); Seven-carbon sugars (e.g., aldoheptose, heptose, etc.); eight-carbon sugars (e.g., octulose, etc.); Deoxy sugars (e.g., 2-deoxy-D-ribose, 6-deoxy-L-galactose, and 6-deoxy-L-mannose, etc.); Amino sugars (e.g., D-glucosamine, D-galactosamine, sialic acid, aminouronic acid, muramic acid, etc.); and Uronic acids (e.g., D-glucuronic acid, D-mannuronic acid, L-guluronic acid, D-galacturonic acid, and L-iduronic acid, etc.) etc.

[0063] Examples of oligosaccharides include sucrose, gunthianose, umbelliferose, lactose, planteose, isolichinoses, α,α-trehalose, raffinose, lychinoses, umbilicin, and stachyose verbascoses.

[0064] Examples of polysaccharides include cellulose, quince seed, chondroitin sulfate, starch, galactan, dermatan sulfate, glycogen, gum arabic, heparan sulfate, hyaluronic acid, tragacanth gum, keratan sulfate, chondroitin, xanthan gum, mucoitin sulfate, guar gum, dextran, keratosulfate, locust bean gum, succinoglucan, and caronic acid.

[0065] Examples of the cooling agent include menthol, camphor, and derivatives thereof. Eucalyptus oil and peppermint oil, which contain these cooling agents, can also be used.

[0066] Chelating agents include, for example, citramalic acid, agaric acid, glyceric acid, shikimic acid, hinokitiol, erodemic acid, tannic acid, caffeic acid, ethylenediaminetetraacetic acid (EDTA), ethyleneglycoldiaminetetraacetic acid, diethylenetriaminepentaacetic acid, phytic acid, polyphosphoric acid, metaphosphoric acid and analogs thereof, as well as alkali metal salts and carboxylate esters thereof.

[0067] Stabilizers include, for example, sodium benzoate and tocopherol.

[0068] Examples of the usability improver include polyglycerin-4-lauryl ether.

[0069] Examples of powder components include: Inorganic powders (e.g., talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, red mica, biotite, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstates, magnesium, silica, zeolites, barium sulfate, calcined calcium sulfate, calcium phosphate, fluorapatite, hydroxyapatite, ceramic powders, metal soaps (e.g., zinc myristate, calcium palmitate, and aluminum stearate), and boron nitride, etc.); Organic powders (e.g., polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, and cellulose powder, etc.); Inorganic white pigments (e.g., titanium dioxide, zinc oxide, etc.); inorganic red pigments (e.g., iron oxide (red iron oxide), iron titanate, etc.); Inorganic brown pigments (e.g., gamma-iron oxide, etc.); Inorganic yellow pigments (e.g., yellow iron oxide, yellow ochre, etc.); Inorganic black pigments (e.g., black iron oxide, and low-order titanium dioxide, etc.); Inorganic violet pigments (e.g., mango violet, cobalt violet, etc.); Inorganic green pigments (e.g., chromium oxide, chromium hydroxide, and cobalt titanate); Inorganic blue pigments (e.g. ultramarine, Prussian blue, etc.); Pearlescent pigments (e.g., titanium dioxide coated mica, titanium dioxide coated bismuth oxychloride, titanium dioxide coated talc, colored titanium dioxide coated mica, bismuth oxychloride, and fish scale foil, etc.); Metal powder pigments (such as aluminum powder, copper powder, etc.); Organic pigments such as zirconium, barium or aluminum lakes (e.g., organic pigments such as Red 201, Red 202, Red 204, Red 205, Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401, and Blue 404, Red 3, Red 104, Red 106, Red 227, Red 230, Red 401, Red 505, Orange 205, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Green 3, and Blue 1, etc.); and Natural pigments (eg, chlorophyll, β-carotene, etc.) are included. In addition, the term "powder" used in this specification is synonymous with "powder."

[0070] Examples of pH adjusters include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate. Examples of vitamins include vitamin A, B1, B2, B6, C, E and derivatives thereof, pantothenic acid and derivatives thereof, biotin, etc.

[0071] Examples of inorganic salts include sodium chloride, potassium chloride, potassium nitrate, and potassium sulfate.

[0072] Examples of coating agents include anionic coating agents (e.g., (meth)acrylic acid / (meth)acrylic acid ester copolymers, and methyl vinyl ether / maleic anhydride copolymers, etc.), cationic coating agents (e.g., cationized cellulose, dimethyldiallyl ammonium chloride copolymers, and dimethyldiallyl ammonium chloride / acrylamide copolymers, etc.), and nonionic coating agents (e.g., polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl acetate, polyacrylic acid ester copolymers, (meth)acrylamide, polymeric silicone, silicone resins, and trimethylsiloxysilicate, etc.).

[0073] Examples of ultraviolet absorbents include: Benzoic acid-based ultraviolet absorbers (e.g., para-aminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N,N-dipropoxy PABA ethyl ester, N,N-diethoxy PABA ethyl ester, N,N-dimethyl PABA ethyl ester, N,N-dimethyl PABA butyl ester, and N,N-dimethyl PABA ethyl ester); Anthranilic acid-based ultraviolet absorbers (e.g., homomenthyl-N-acetylanthranilate, etc.); Salicylic acid-based ultraviolet absorbers (e.g., amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanol phenyl salicylate); cinnamic acid-based ultraviolet absorbers (e.g., octyl cinnamate, ethyl 4-isopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, ethyl 2,4-diisopropyl cinnamate, methyl 2,4-diisopropyl cinnamate, propyl p-methoxy cinnamate, isopropyl p-methoxy cinnamate, isoamyl p-methoxy cinnamate, octyl p-methoxy cinnamate (2-ethylhexyl p-methoxy cinnamate), 2-ethoxyethyl p-methoxy cinnamate, cyclohexyl p-methoxy cinnamate, ethyl α-cyano β-phenyl cinnamate, 2-ethylhexyl α-cyano β-phenyl cinnamate, and glyceryl mono-2-ethylhexanoyl di-para-methoxy cinnamate, etc.); Benzophenone-based ultraviolet absorbers (e.g., 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, and 4-hydroxy-3-carboxybenzophenone, etc.); 3-(4'-methylbenzylidene)-d,l-camphor; 3-Benzylidene-d,l-camphor; 2-Phenyl-5-methylbenzoxazole; 2,2'-Hydroxy-5-methylphenylbenzotriazole; 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole; 2-(2'-hydroxy-5'-methylphenylbenzotriazole;Dibenzalazine; Dianisoylmethane; 4-Methoxy-4'-t-butyldibenzoylmethane; and 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one and the like.

[0074] Examples of sequestering agents include 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, disodium edetate, trisodium edetate, tetrasodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, trisodium ethylenediaminehydroxyethyltriacetate, and disodium ethylenediaminetetraacetate.

[0075] Examples of the amino acid include neutral amino acids (e.g., threonine, cysteine, etc.), basic amino acids (e.g., hydroxylysine, etc.), etc. Examples of the amino acid derivatives include sodium acyl sarcosine (sodium lauroyl sarcosine), acyl glutamate, sodium acyl β-alanine, glutathione, pyrrolidone carboxylic acid, etc.

[0076] Examples of the organic amine include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol.

[0077] Examples of polymer emulsions include acrylic resin emulsions, polyethyl acrylate emulsions, acrylic resin liquids, polyacrylic alkyl ester emulsions, polyvinyl acetate resin emulsions, and natural rubber latex.

[0078] Examples of vitamins include vitamins A, B1, B2, B6, C, E and their derivatives, pantothenic acid and its derivatives, and biotin.

[0079] Examples of antioxidants include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters, sulfites, and hydrogen sulfites. Examples of antioxidant assistants include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, cephalin, hexametaphosphate, phytic acid, and ethylenediaminetetraacetic acid.

[0080] Other possible ingredients include: Preservatives (ethylparaben, butylparaben, etc.); anti-inflammatory agents (e.g., glycyrrhizinic acid derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc.); whitening agents (e.g., placenta extract, saxifrage extract, and arbutin, etc.); Various extracts (e.g. Phellodendron bark, Coptis japonica, Lithospermum root, Peony root, Swertia japonica, Birch, Sage, Loquat, Carrot, Aloe, Mallow, Iris, Grape, Coix seed, Loofah, Lily, Saffron, Cnidium rhizome, Angelica acutiloba, Hypericum perforatum, Ononis, Garlic, Capsicum annuum, Citrus aurantium, Angelica acutiloba, Seaweed, etc.); Enhancers (e.g., royal jelly, photosensitizers, cholesterol derivatives, etc.); Circulation enhancers (e.g., nonylic acid valenylamide, nicotinic acid benzyl ester, nicotinic acid β-butoxyethyl ester, capsaicin, zingerone, cantharides tincture, ichthammol, tannic acid, α-borneol, tocopherol nicotinate, inositol hexanicotinate, cyclandelate, cinnarizine, tolazoline, acetylcholine, verapamil, cepharanthine, and γ-oryzanol, etc.); Antiseborrheic agents (e.g., sulfur, thianthol, etc.); Anti-inflammatory agents (e.g., tranexamic acid, thiotaurine, and hypotaurine) etc.

[0081] Furthermore, the cleansing agent of the present invention may also appropriately contain caffeine, tannin, verapamil, tranexamic acid and its derivatives, various herbal extracts such as licorice, quince and Japanese anemone, skin whitening agents such as tocopherol acetate, glycyrrhesic acid, magnesium ascorbyl phosphate, ascorbyl glucoside, arbutin and kojic acid, amino acids such as arginine and lysine and their derivatives.

[0082] The cleansing agent according to the present invention exhibits excellent foam quality when the storage modulus is within a specific range. Specifically, the storage modulus at 154% strain is preferably 4.08 Pa or more, and more preferably 4.10 or more. When the storage modulus at 154% strain of the cleansing agent is 4.08 Pa or more, the creaminess of the foam can be further improved. The storage modulus can be measured under the following conditions using a strain-controlled rheometer (manufactured by TA Instruments) or an apparatus with equivalent performance. (Measurement conditions) ·Temperature;20℃ Parallel plate: 50mmφ Gap between plates: 1.0mm Strain amplitude: 0.5% Frequency: 10Hz

[0083] The cleansing agent according to the present invention is preferably a facial cleansing agent. The cleansing agent according to the present invention can also be applied to a pump foamer that pushes a nozzle provided on a container and discharges the cleansing agent in a foam state. EXAMPLES

[0084] The present invention will be described in detail with reference to the following examples, but the present invention is not limited to these examples. The blend amounts are shown in mass % unless otherwise specified.

[0085] [Examples 1 to 5 and Comparative Examples 1 to 4] Cleansing agents of Examples 1 to 5 and Comparative Examples 1 to 4 were prepared according to the formulations shown in Table 1. In the table, the first and second alkylene oxide derivatives are as follows. (b) First alkylene oxide derivative; AO=oxypropylene, m=7, n=14 (c) Second alkylene oxide derivative; AO'=oxypropylene, o=41, p=36

[0086] Furthermore, the performance of these cleansing agents was evaluated according to the following criteria. [Foam quality (creaminess)] Water was added to each of the cleansing agents of Examples 1 to 5 and Comparative Examples 1 to 4, and the cleansing agents were foamed, and the creaminess of the foam was evaluated. The evaluation results are shown in Table 1. A: Creamy B: Slightly creamy C: Not creamy

[0087] [Foam durability] In the above foam quality evaluation, the foam immediately after whipping and the foam after 5 minutes were observed under a microscope to evaluate the change in average foam size. The evaluation results are shown in Table 1. A: Almost no change in bubble diameter is observed B: The change in bubble diameter becomes slightly larger. C: The bubbles have merged to increase in diameter.

[0088] [Storage modulus of detergent] The storage modulus at a strain of 154% of the cleansing agents of Examples 1 to 5 and Comparative Examples 1 to 4 was measured under the following conditions. The measurement results are shown in Table 1. (Measurement conditions) Measurement equipment: strain-controlled rheometer (manufactured by TA Instruments) ·Temperature;20℃ Parallel plate: 50mmφ Gap between plates: 1.0mm Strain amplitude: 0.5% Frequency: 10Hz

[0089] [Table 1]

[0090] The results show that the cleansing agent containing the essential components of the present invention exhibits excellent properties, whereas the absence of either the first alkylene oxide derivative or the second alkylene oxide derivative results in insufficient performance (Comparative Examples 1 to 4).

Claims

1. (a) a higher fatty acid or a salt thereof; (b) a first alkylene oxide derivative represented by the following general formula (1); and 2 １ [((AO) ｍ (59) ｎ )-2 ２ (1) (c) a second alkylene oxide derivative represented by the following general formula (2): 2 ３ [(AO') ｏ (59) ｐ )-2 ４ (2) Including cleaning agents. (In the general formula (1), AO represents an oxyalkylene group having 3 to 4 carbon atoms, EO represents an oxyethylene group, m and n represent the average number of moles of the oxyalkylene group having 3 to 4 carbon atoms and the oxyethylene group added, respectively, and satisfy the conditions of 1≦m≦70, 1≦n≦70, and m / n<0.80; R １ and R ２ R represents a hydrocarbon group having 1 to 4 carbon atoms or a hydrogen atom, which may be the same or different; １ and R ２ The ratio of the number of hydrogen atoms to the number of hydrocarbon groups is 0.15 or less, In the general formula (2), AO′ represents an oxyalkylene group having 3 to 4 carbon atoms, EO represents an oxyethylene group, o and p represent the average number of moles of the oxyalkylene group having 3 to 4 carbon atoms and the oxyethylene group added, respectively, and satisfy the conditions of 1≦o≦70, 1≦p≦70, and 1.05≦o / p; R ３ and R ４ R represents a hydrocarbon group having 1 to 4 carbon atoms or a hydrogen atom, which may be the same or different; ３ and R ４ The ratio of the number of hydrogen atoms to the number of hydrocarbon groups is 0.15 or less.

2. 2. The cleansing agent according to claim 1, wherein in said general formula (1) and said general formula (2), AO or AO' and EO are added randomly.

3. Relative to the total mass of the cleaning agent, The amount of the first alkylene oxide derivative (b) is X (mass%), When the blending amount of the second alkylene oxide derivative (c) is Y (mass%), 3. The cleansing agent according to claim 1, wherein X and Y satisfy 0.1≦X / Y≦30.

4. 4. The cleansing agent according to claim 3, wherein X and Y satisfy 0.1≦X / Y≦20.

5. In the general formula (1), m and n satisfy m+n<30, and The cleansing agent according to any one of claims 1 to 4, wherein, in the general formula (2), o and p satisfy 30<o+p.

6. The cleansing agent according to any one of claims 1 to 5, wherein the blending amount X of the first alkylene oxide derivative (b) is 0.1 to 5 mass % based on the total mass of the cleansing agent.

7. The cleansing agent according to any one of claims 1 to 6, wherein the blending amount Y of the second alkylene oxide derivative (c) is 0.005 to 5 mass % based on the total mass of the cleansing agent.

8. The cleansing agent according to any one of claims 1 to 7, further comprising (d) a polymer having a cationic group.

9. The cleansing agent according to claim 8, wherein the polymer (d) having a cationic group is a copolymer containing a diallyldialkyl quaternary ammonium salt as a polymerized unit.

10. 10. The cleansing agent according to claim 8, wherein the polymer (d) having a cationic group is a copolymer containing a diallyldialkyl quaternary ammonium salt and an acrylamide as polymerized units.

11. The cleansing agent according to any one of claims 8 to 10, wherein the polymer (d) having a cationic group is a copolymer containing a diallyldialkyl quaternary ammonium salt, an acrylamide, and an acrylic acid as polymerized units.

12. The cleansing agent according to any one of claims 8 to 11, wherein the blending amount of the polymer (d) having a cationic group is 0.01 to 1 mass % based on the total mass of the cleansing agent.

13. The cleansing agent according to any one of claims 1 to 12, further comprising (e) a highly polymerized polyethylene glycol having a weight average molecular weight of 500,000 to 6,500,000.

14. The cleansing agent according to claim 13, wherein the blending amount of the polyethylene glycol (e) is 0.001 to 0.1 mass % based on the total mass of the cleansing agent.

15. The cleansing agent according to any one of claims 1 to 14, which is used as a facial cleanser.

Images