Hair cleansing composition

Abstract

To provide a hair washing composition that is effective in preventing the fading of dyed hair and gives bubbles in high volume and with high resilience, offering a good feel during washing.SOLUTION: A hair washing composition contains component (A): a surfactant of formula (1) described in Claim 1 of 1-20 mass%, component (B): an anionic surfactant, different from the component (A), of 0.1-10 mass%, and component (C): an ampholytic surfactant of 1-20 mass%, with the mass ratio of the components (A), (B) and (C) being (A) / (B)>1.0, and {(A)+(B)} / (C)≥1.0.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a hair wash composition, and more particularly to a hair wash composition which can be suitably applied to dyed hair that has been dyed. [Background technology]

[0002] Hair cleansing compositions such as shampoos have been improved in various ways to wash away dirt adhering to the hair and scalp and to provide a comfortable hair and scalp environment. With regard to the feeling of use, improvements have been made to improve the foam volume and elasticity of the foam so that the hair feels good even during washing.

[0003] On the other hand, the habit of dyeing hair has spread to people of all ages and genders, and various types of hair dyes have been released onto the market, including permanent hair dyes such as hair color that use oxidative dyes; semi-permanent hair dyes such as hair manicures, color shampoos, and color treatments that use acidic or basic dyes; and temporary hair dyes such as color sprays that use pigments to temporarily color hair. One of the requirements for such hair dyes is that the color of the hair after dyeing, that is, the color of the hair that has been dyed, lasts long (prevention of fading).

[0004] For the purpose of suppressing fading, for example, a color shampoo composition proposed in Patent Document 1 may be used. However, this color shampoo composition contains a dye and is applied as the hair is washed to dye it. Although it is effective in preventing fading, the dye may not be the same color as the original hair color, or the original hair color may not be maintained.

[0005] In response to this, hair wash compositions that make the dyed color itself less likely to fade have also been proposed. For example, Patent Document 2 discloses a hair wash containing an amphoteric surfactant and a chelating agent, and Patent Document 3 discloses a hair wash containing an amphoteric surfactant, an anionic amino acid surfactant, an anionic surfactant other than amino acid surfactants, a cationic polymer compound, and a chelating agent, with the amphoteric surfactant being more abundant than each anionic surfactant. However, although these hair washes are excellent in preventing fading, they contain more amphoteric surfactants than anionic surfactants, and therefore may not produce enough foam volume or foam elasticity to provide a good washing sensation when washing hair.

[0006] Furthermore, Patent Document 4 discloses a hair cleanser composition containing a specific amphoteric surfactant (amidopropyl betaine type) and a specific anionic surfactant (acylmethyl taurine salt). However, although the composition is excellent in preventing discoloration and has an excellent foam volume when an anionic surfactant is blended in excess of an amphoteric surfactant, the foam elasticity may be insufficient. Therefore, there is a demand for a hair wash composition that, when applied to dyed hair, is excellent in inhibiting fading and also has excellent foam volume and foam elasticity, thereby providing a good washing feel during hair washing. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2019-218295 A [Patent Document 2] JP 2017-19739 A [Patent Document 3] JP 2017-19740 A [Patent Document 4] JP 2002-275038 A Summary of the Invention [Problem to be solved by the invention]

[0008] Therefore, an object of the present invention is to provide a hair wash composition which is excellent in inhibiting fading of dyed hair that has been dyed, and which is capable of producing a large amount of foam with high elasticity that provides a good washing sensation. [Means for solving the problem]

[0009] Means for Solving the Problems The present inventors conducted intensive research to solve the above problems, and as a result, discovered that by combining a specific anionic surfactant, another anionic surfactant, and an amphoteric surfactant in a specific mass ratio, it is possible to obtain a detergent composition which is excellent in inhibiting fading of dyed hair that has been dyed, and which also has excellent foam volume and foam elasticity and provides a good washing feel, thereby completing the present invention. That is, the present invention is as follows.

[0010] Component (A): 1 to 20 mass% of a surfactant represented by the following formula (1), Ingredient (B): Polyoxyethylene alkyl ether sulfates, N-acyl methyl taurine salts and Other than the above component (A) One or more selected from the group consisting of N-acylamino acid salts Anionic Surfactants (However, sodium lauroyl methyl taurate is excluded.) 0.1 to 10 mass %, Ingredients (C): One or more selected from the group consisting of lauryl betaine, coconut oil fatty acid amidopropyl betaine, palm kernel oil fatty acid amidopropyl betaine, lauryl hydroxysulfobetaine, and sodium cocoamphoacetate 1 to 20% by mass of amphoteric surfactant The mass ratio of component (A), component (B) and component (C) is 4.0≧ (A) / (B) ≧2.0 and 2.1≧ A hair wash composition, characterized in that {(A)+(B)} / (C)≧1.0.

[0011] [ka] (In formula (1), R 1 CO represents an aliphatic acyl group having 8 to 22 carbon atoms, and R 2 represents a single bond or a linear or branched alkylene group having 1 to 4 carbon atoms; R 3represents a linear or branched alkylene group having 1 to 4 carbon atoms, and M represents an alkali metal, a 1 / 2 alkaline earth metal, an organic ammonium, or an amino acid salt. Effect of the Invention

[0012] The hair wash composition of the present invention (hereinafter, also simply referred to as "cleaner composition"), when used particularly when washing dyed hair, exhibits the effects of excellent inhibition of discoloration and further of providing a large amount of foam with high elasticity, which provides a good washing sensation. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described. In this specification, a numerical range defined using the symbol "~" is intended to include both the upper and lower limits of the range. For example, "2~5" means 2 or more and 5 or less.

[0014] The cleaning composition of the present invention contains at least the components (A), (B) and (C). Each component will be described below.

[0015] [Component (A)] Component (A) is a surfactant represented by the following formula (1).

[0016] [ka]

[0017] R in formula (1) 1CO represents an aliphatic acyl group having 8 to 22 carbon atoms, preferably 8 to 18 carbon atoms. The aliphatic acyl group includes not only acyl groups derived from saturated or unsaturated fatty acids having 8 to 22 carbon atoms, but also acyl groups derived from mixed fatty acids containing two or more of these fatty acids. Examples include coconut oil fatty acid acyl groups, palm kernel oil fatty acid acyl groups, capryloyl groups, caproyl groups, lauroyl groups, myristoyl groups, palmitoyl groups, stearoyl groups, oleoyl groups, and behenyl groups. Among these, preferred are lauroyl groups, myristoyl groups, coconut oil fatty acid acyl groups, and palm kernel oil fatty acid acyl groups, and more preferred are lauroyl groups, coconut oil fatty acid acyl groups, and palm kernel oil fatty acid acyl groups.

[0018] R in formula (1) 2 represents a single bond or a linear or branched alkylene group having 1 to 4 carbon atoms. Examples of the linear or branched alkylene group having 1 to 4 carbon atoms include a methylene group, an ethylene group, an n-propylene group, an isopropylene group, an n-butylene group, and an isobutylene group, and preferably an ethylene group or an n-propylene group. That is, R in formula (1) 2 Examples of OH include a hydroxy group, a monohydroxyethyl group, a monohydroxypropyl group, a monohydroxyisopropyl group, a monohydroxybutyl group, and a 2-hydroxybutyl group, and are preferably a monohydroxyethyl group or a monohydroxypropyl group.

[0019] R in formula (1) 3 R represents a linear or branched alkylene group having 1 to 4 carbon atoms. 3 Examples of R include a methylene group, an ethylene group, an n-propylene group, an isopropylene group, an n-butylene group, and an isobutylene group, and preferably an ethylene group or an n-propylene group. 3Examples of COO include a monocarboxymethylene group, a monocarboxyethylene group, a monocarboxypropylene group, a monocarboxyisopropylene group, a monocarboxybutylene group, and a monocarboxyisobutylene group, and preferably a monocarboxyethylene group or a monocarboxypropyl group.

[0020] In formula (1), M represents an alkali metal, a 1 / 2 alkaline earth metal, an organic ammonium, or an amino acid salt. Examples of the alkali metal include sodium and potassium, and examples of the alkaline earth metal include magnesium and calcium. Examples of the organic ammonium include monoethanol ammonium, diethanol ammonium, and triethanol ammonium. Furthermore, the amino acid salt is a salt formed by an amino acid and an alkali metal, an amino acid and a 1 / 2 alkaline earth metal, or an amino acid and an organic amine, and acts as a counter ion of the acyl amino acid. Examples of the amino acid that forms the amino acid salt include valine, leucine, isoleucine, histidine, lysine, methionine, phenylalanine, threonine, tryptophan, asparagine, aspartic acid, alanine, arginine, cysteine, glutamine, glutamic acid, glycine, proline, serine, tyrosine, N-methylglycine, N-methyl-β-alanine, N-(2-hydroxyethyl)-β-alanine, taurine, and methyltaurine. Examples of the alkali metal and alkaline earth metal that form the amino acid salt include those exemplified above. Examples of the organic amine that forms the amino acid salt include monoethanolamine, diethanolamine, and triethanolamine. In addition, the "organic ammonium" in the present invention does not conceptually include an amino acid and an organic amine or an amino acid ammonium formed. M is preferably sodium, potassium, triethanolammonium, sodium taurine, potassium taurine, or triethanolamine taurine, and more preferably sodium, triethanolammonium, sodium taurine, or triethanolamine taurine.

[0021] Specific examples of the surfactant represented by formula (1) include N-lauroyl-N-hydroxyethyl-β-alanine sodium, N-lauroyl-N-hydroxyethyl-β-alanine triethanolamine, N-lauroyl-N-hydroxypropyl-β-alanine triethanolamine, and N-coconut oil fatty acid acyl-N-hydroxyethyl-β-alanine sodium. As the component (A), one type selected from the surfactants of the above formula (1) can be used alone, or two or more types can be used in combination.

[0022] The content of component (A) in the cleaning composition of the present invention is 1 to 20 mass %, preferably 5 to 15 mass %, more preferably 5 to 10 mass % of the total amount of the composition. If the content of component (A) is too low, the color fading inhibition, foam volume, and foam elasticity may be poor, and if the content of component (A) is too high, the color fading inhibition may be poor.

[0023] [Component (B)] Component (B) is an anionic surfactant other than component (A). Examples of such anionic surfactants include alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkylamide ether sulfates, polyoxyethylene alkylamide ether sulfates, polyoxyethylene alkyl ether acetates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, α-olefin sulfonates, higher fatty acid salts, N-acylamino acid salts other than component (A), N-acyl isethionates, N-acyl methyl taurines, N-acyl polypeptide salts, alkyl sulfosuccinates, etc. Among these, N-acyl methyl taurines and N-acyl amino acid salts other than component (A) are preferred, and N-acyl methyl taurines are more preferred. From the viewpoint of foam volume and foam elasticity, the number of carbon atoms in the alkyl group or acyl group of these anionic surfactants is preferably 8 to 18. The alkyl group or acyl group may be derived from any of saturated fatty acids, unsaturated fatty acids, and mixed fatty acids which are mixtures of these. Examples of mixed fatty acids include coconut oil fatty acids and palm kernel oil fatty acids. Counter ions of these anionic surfactants include, for example, alkali metals, 1 / 2 alkaline earth metals, organic ammonium, and amino acid salts, and specific examples thereof include those described for M of component (A).

[0024] Specific examples of the anionic surfactant of component (B) include, for example, POE (3) sodium lauryl ether sulfate, sodium N-coconut oil fatty acid acyl-N-methyl taurate, sodium N-coconut oil fatty acid acyl-N-methyl taurate taurate, sodium N-lauroyl-N-methyl-β-alanine, and sodium N-coconut oil fatty acid acyl glutamate. As component (B), one type selected from the above anionic surfactants can be used alone, or two or more types can be used in combination.

[0025] The content of component (B) in the cleaning composition of the present invention is 0.1 to 10 mass % of the total amount of the composition, preferably 2 to 10 mass %, more preferably 3 to 7 mass %. If the content of component (B) is too low, the foam volume and foam elasticity may be poor, and if the content of component (B) is too high, the fading inhibition may be poor.

[0026] [Component (C)] Component (C) is an amphoteric surfactant, which is a surfactant having a structure having an N-acyl group or an N-alkyl group, a cationic group, and an anionic group. Examples of such surfactants include alkyl betaines, alkyl amido betaines, alkyl hydroxy sulfo betaines, alkyl amido hydroxy sulfo betaines, alkyl carboxymethyl hydroxyethyl imidazolinium betaines, alkyl amido hydroxyethyl amino acid type amphoteric surfactants, and alkyl imino diacetates.

[0027] The N-acyl group contained in the amphoteric surfactant is, for example, a straight-chain or branched-chain fatty acid residue having 8 to 18 carbon atoms. Examples of the fatty acid of the fatty acid residue include saturated fatty acids such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid; unsaturated fatty acids such as palmitoleic acid, oleic acid, elaidic acid, linoleic acid, and linolenic acid; and mixtures thereof such as coconut oil fatty acid, palm kernel oil fatty acid, beef tallow fatty acid, and hardened beef tallow fatty acid. Among these, preferred are lauric acid, myristic acid, palmitic acid, oleic acid, coconut oil fatty acid, and palm kernel oil fatty acid, and more preferred are lauric acid, coconut oil fatty acid, and palm kernel oil fatty acid.

[0028] The alkyl group contained in the amphoteric surfactant is, for example, a hydrocarbon group having 8 to 18 carbon atoms, and also includes mixed alkyl groups derived from mixed fatty acids. Examples include alkyl groups such as caprylyl group, capryl group, lauryl group, myristyl group, palmityl group, stearyl group, and oleyl group; and mixed alkyl groups such as coconut oil alkyl group, palm kernel oil alkyl group, and beef tallow alkyl group. Among these, preferred are lauryl group, myristyl group, palmityl group, coconut oil alkyl group, and palm kernel oil alkyl group, and more preferred are lauryl group, coconut oil alkyl group, and palm kernel oil alkyl group.

[0029] Specific examples of the amphoteric surfactant of component (C) include lauryl betaine, coconut oil fatty acid amidopropyl betaine, palm kernel oil fatty acid amidopropyl betaine, lauryl hydroxysulfobetaine, and sodium cocoamphoacetate. As component (C), one type selected from the above amphoteric surfactants can be used alone, or two or more types can be used in combination.

[0030] The content of component (C) in the cleaning composition of the present invention is 1 to 20 mass %, preferably 5 to 15 mass %, and more preferably 5 to 10 mass % of the total amount of the composition. If the content of component (C) is too low, the inhibition of fading may be poor, and if the content of component (C) is too high, the foam volume and foam elasticity may be poor.

[0031] [Quantitative relationship of each component] The mass ratio of component (A) to component (B) in the cleaning composition of the present invention [(A) / (B)] is (A) / (B)>1.0, preferably (A) / (B)≧1.5, and more preferably (A) / (B)≧2.0. If the mass ratio [(A) / (B)] is 1.0 or less, the foam elasticity and the prevention of discoloration may be inferior. The upper limit of the mass ratio [(A) / (B)] is usually 4.0≧(A) / (B), preferably 3.5≧(A) / (B), and more preferably 3.0≧(A) / (B).

[0032] In addition, the mass ratio of the total of components (A) and (B) to component (C) in the cleaning composition of the present invention [{(A)+(B)} / (C)] is {(A)+(B)} / (C) ≥ 1.0, and preferably {(A)+(B)} / (C) ≥ 1.2. If the mass ratio [{(A)+(B)} / (C)] is less than 1.0, the foam volume and foam elasticity may be poor. The upper limit of the mass ratio [{(A)+(B)} / (C)] is usually 4.0≧{(A)+(B)} / (C), preferably 3.0≧{(A)+(B)} / (C), and more preferably 2.0≧{(A)+(B)} / (C).

[0033] [Other ingredients] The cleaning composition of the present invention usually contains water in addition to the above components (A) to (C). Examples of water include purified water, tap water, and deionized water. The content of water in the cleaning composition of the present invention is usually 50 to 97 mass %, preferably 60 to 95 mass %, more preferably 70 to 90 mass %, and particularly preferably 75 to 85 mass %, based on the total amount of the composition.

[0034] The cleaning composition of the present invention may contain other optional components within the scope not impairing the effects of the present invention. Other optional components include, for example, oils and fats such as vegetable oils and animal oils; hydrocarbon oils such as squalane, liquid paraffin, and hydrogenated polyisobutene; higher alcohols such as cetyl alcohol, stearyl alcohol, and cetostearyl alcohol; silicones such as cyclic silicone, dimethylpolysiloxane, and amino-modified polysiloxane; ester oils such as 2-ethylhexyl palmitate, tri(caprylic acid / capric acid)glyceryl, and isopropyl myristate; and cationic surfactants such as stearyltrimethylammonium chloride, benzalkonium chloride, and cocoyl arginine ethyl PCA. nonionic surfactants such as polyoxyethylene alkyl ethers, polyglycerol fatty acid esters, and polyoxyethylene glycerol fatty acid esters; water-soluble polymers such as hydroxyethyl cellulose, cationized cellulose, polyquaternium-10, polyethylene glycol, polyvinyl alcohol, and carboxyvinyl polymer; solvents such as ethanol, propylene glycol, and glycerin; pH adjusters such as citrates, succinates, malates, and tartrates; antioxidants such as tocopherol; polysaccharides, amino acids, peptides, preservatives, fragrances, coloring agents, and the like may be contained as appropriate.

[0035] The content of other optional components is usually 0 to 20 mass %, preferably 0.1 to 15 mass %, and more preferably 1 to 10 mass %, of the total amount of the composition.

[0036] The pH of the cleaning composition of the present invention is not particularly limited, but the value at 25° C. in the undiluted form without dilution with water is preferably 4.5 to 8.0, more preferably 5.0 to 7.5, and particularly preferably 5.5 to 7.0. The pH can be measured using a pH meter in accordance with JIS Z8802. EXAMPLES

[0037] Hereinafter, the embodiments of the present invention will be described more specifically with reference to examples and comparative examples.

[0038] [Examples 1 to 8 and Comparative Examples 1 to 5] <Preparation of cleaning composition> Components (A) to (C) in Tables 1 and 2 and other components were successively added to water, mixed, and uniformly dissolved to prepare hair wash compositions of Examples 1 to 8 and Comparative Examples 1 to 5. The pH of the obtained hair wash compositions was measured using a pH meter in accordance with JIS Z8802, and the results are shown in Tables 1 and 2. Commercially available products provided for use in cosmetics were used as the components in Tables 1 and 2. The content of each component in Tables 1 and 2 is shown in mass%. Note that Polyquaternium-10 listed in Tables 1 to 4 is a quaternary ammonium salt type cationic surfactant. For each of the cleaning compositions of Examples 1 to 8 and Comparative Examples 1 to 5, the foam volume, foam elasticity, and fading inhibition were evaluated as described in (1) to (3) below, and the evaluation results are shown in Tables 1 and 2.

[0039] <Evaluation of cleaning agent composition> (1) Foam volume 10 mL of each of the cleaning compositions of the Examples and Comparative Examples was taken and diluted with purified water to a total volume of 50 mL, and the composition was foamed for 5 seconds using a blender ("IFM-100" manufactured by Iwatani Corporation) and allowed to stand for 1 minute. The height of the foam in the blender container was then measured. Based on the measured foam height, the foam volume of the cleaning composition was evaluated into four grades of "◎", "◯", "△", and "×" according to the following evaluation criteria. The compositions were evaluated as passing when they were evaluated as "◎" or "◯". <Evaluation criteria> ◎: Foam height is 60mm or more ○: Foam height is 50mm or more and less than 60mm △: Foam height is 40mm or more but less than 50mm ×: Bubble height is less than 40 mm

[0040] (2) Foam elasticity 20 mL of each of the cleaning compositions of the Examples and Comparative Examples was taken, diluted with purified water to a total volume of 100 mL, and placed in a 1,000 mL measuring cylinder without foaming. Next, a diffuser stone (Sudo Co., Ltd.'s "Bubble Mate, Starpet S105-D") was attached to a goldfish pump (Nihon Dobutsu Yakuhin Co., Ltd.'s "Air Pump, Nichido Non-Noise S200"), the diffuser stone was immersed in the dilution solution, and foam was generated to 1,000 mL at a flow rate of 1,000 mL / min. A float (Umezu Co., Ltd.'s "Fluorescent Synthetic Ball Float No. 15, weight 10 g") with a weight (weight 5 g) was placed in the foam, and the time it took for the center line of the float to pass from 1,000 mL to 500 mL was measured. Based on the measured time, the foam elasticity of the cleaning composition was evaluated in four stages, "◎", "○", "△", and "×", according to the following evaluation criteria. The evaluation of "◎" and "○" was deemed to be acceptable. <Evaluation criteria> ◎: Passage time 15 seconds or more ○: Passing time 10 seconds or more and less than 15 seconds △: Passing time is between 5 and 10 seconds ×: Passing time less than 5 seconds

[0041] (3) Suppression of fading A commercially available oxidative hair dye (Men's Bigen, Mousse Color, Natural Black, manufactured by Hoyu Corporation) was applied to a 1g bundle of 100% yak hair (manufactured by Bealux Co., Ltd.), left for 30 minutes, then rinsed with 40°C warm water, towel-dried, and dried with a hair dryer before the dyeing process. 50 mL of each of the cleaning compositions of the Examples and Comparative Examples was taken and diluted with purified water to a total volume of 100 mL. A bundle of 1 g of yak hair that had been dyed as above was immersed in the diluted solution and allowed to stand at 23° C. for 24 hours. After standing, the bundle was rinsed with warm water at 40° C., towel-dried, and then dried with a hair dryer. The L * Value, a * Value, b *The values ​​were measured. From these values, the color difference ΔE was calculated according to the following formula. Based on the calculated color difference, the fading inhibition of the cleaning composition was evaluated in four stages of "◎", "○", "△", and "×" according to the following evaluation criteria. The cases where the evaluation was "◎" or "○" were judged to be acceptable. Color difference ΔE=[(ΔL * ) 2 +(Δa * ) 2 +(Δb * ) 2 ] (1 / 2) ΔL * , Δa * , Δb * : Difference in each value before and after cleaning <Evaluation criteria> ◎: ΔE is less than 7.0 ○: ΔE is 7.0 or more and less than 8.0 △: ΔE is 8.0 or more and less than 9.0 ×: ΔE is 9.0 or more

[0042] The cleaning compositions of Examples 1 to 8 all exhibited good foam volume, foam elasticity, and prevention of fading. On the other hand, Comparative Example 1, which did not contain component (A), was inferior in terms of foam volume, foam elasticity, and prevention of discoloration. Comparative Example 2, which did not contain component (B), was inferior in terms of foam volume and foam elasticity. In Comparative Example 3, since component (C) was not contained, the inhibition of fading was insufficient. In Comparative Example 4, the mass ratio of component (A) to component (B) [(A) / (B)] was 1.0 or less, and therefore the inhibition of fading was insufficient. In Comparative Example 5, the mass ratio of the sum of components (A) and (B) to component (C), {(A) + (B)} / (C)}, was less than 1.0, and the foam volume and foam elasticity were therefore poor.

[0043] [Table 1]

[0044] [Table 2]

[0045] Further, the formulation examples of the hair cleansing composition of the present invention are specifically shown below. In each formulation example, the total amount was adjusted to 100 mass% with water. In each formulation example, the pH was 6.0.

[0046] [Table 3]

[0047] [Table 4]

[0048] The hair wash compositions of these formulation examples exhibited a large amount of foam and foam elasticity, and also exhibited good inhibition of discoloration, demonstrating the effects of the present invention. [Industrial Applicability]

[0049] INDUSTRIAL APPLICABILITY The hair wash composition of the present invention is excellent in inhibiting discoloration and is capable of producing a large amount of foam with high elasticity that provides a good washing sensation, and therefore can be suitably used as a wash composition for dyed hair that has been dyed.

Claims

1. Component (A): 1 to 20% by mass of a surfactant represented by the following formula (1), Component (B): 0.1 to 10% by mass of one or more anionic surfactants (excluding sodium lauroyl methyl taurine) selected from the group consisting of polyoxyethylene alkyl ether sulfates, N-acyl methyl taurine salts, and N-acyl amino acid salts other than component (A), Component (C): 1 to 20% by mass of one or more amphoteric surfactants selected from the group consisting of lauryl betaine, coconut oil fatty acid amidopropyl betaine, palm kernel oil fatty acid amidopropyl betaine, lauryl hydroxysulfobetaine, and sodium cocoamphoacetate. wherein the mass ratios of component (A), component (B) and component (C) are 4.0 ≧ (A) / (B) ≧ 2.0 and 2.1 ≧ {(A) + (B)} / (C) ≧ 1.

0. 【Chemistry 1】 (In formula (1), R １ CO represents an aliphatic acyl group having 8 to 22 carbon atoms; R 2 represents a single bond or a linear or branched alkylene group having 1 to 4 carbon atoms; R 3 represents a linear or branched alkylene group having 1 to 4 carbon atoms, and M represents an alkali metal, a 1 / 2 alkaline earth metal, an organic ammonium, or an amino acid salt.

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