Composition for skin cleansing

Abstract

To provide a composition for skin cleansing which has significantly superior formulation stability; is dispensed in the form of fine, high-quality foam; exhibits durable foam stability after it is dispensed; and delivers a non-irritating feel on use and superior cleansing performance.SOLUTION: The present invention provides a composition for skin cleansing, which is dispensed in the form of foam, and which contains component A: an acyl isethionate salt, component B: an amphoteric surfactant, component C: an anionic surfactant (excluding component A), and component D: a polyhydric alcohol.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a skin cleansing composition, and more particularly to a skin cleansing composition that is discharged in the form of a foam. [Background technology]

[0002] Skin cleansing agents such as face washes and body soaps include solid skin cleansing agents such as solid soaps, skin cleansing agents in the form of gels, pastes or creams filled in tube containers, skin cleansing agents discharged in the form of liquids, gels, pastes or emulsions from pump dispensers, and skin cleansing agents discharged in the form of foams from non-aerosol type pump foamer containers or squeeze foamer containers.

[0003] Among these various forms of skin cleansers, the demand for skin cleansers dispensed in foam form is increasing due to the advantage in terms of usage that no separate foaming is required and that even small children can easily form foam.

[0004] On the other hand, in order to develop a skin cleanser that is dispensed in foam form, various challenges must be overcome in response to various requirements, such as "Is the formulation stable?", "Can it be dispensed in foam form without clogging?", "Is the foam quality (fineness) of the dispensed foam good?", "Is the foam that is formed long-lasting?", "Is it comfortable to use without irritation?", and "Is the basic function of the skin cleansing effect satisfactory?", and the current situation is that there are not many skin cleansers that meet all of these requirements and also satisfy users.

[0005] Although various studies and attempts have been made in this technical field (see, for example, Patent Documents 1 to 7), none have been sufficiently satisfactory in meeting the various requirements of users. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2002-047172 A [Patent Document 2] JP 2002-087942 A [Patent Document 3] JP 2004-339135 A [Patent Document 4] JP 2006-193549 A [Patent Document 5] JP 2009-234965 A [Patent Document 6] JP 2017-007963 A [Patent Document 7] JP 2022-153057 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in view of the above-mentioned conventional techniques. That is, an object of the present invention is to provide a skin cleansing composition which has remarkably good formulation stability, is discharged as a fine and high-quality foam, the discharged foam lasts long, provides a non-irritating feel when used, and exhibits an excellent cleansing effect. [Means for solving the problem]

[0008] That is, the present invention provides a skin cleansing composition that is discharged in the form of a foam, and is characterized by containing the following component A, component B, component C, and component D: Component A: Acylated isethionate Component B: Amphoteric surfactant Component C: Anionic surfactants (excluding component A) Component D: Polyhydric alcohol

[0009] The above component B is preferably a betaine-type amphoteric surfactant.

[0010] It is preferable that the mass content ratio of the content of the component B to the content of the component A (component B / component A) is 2 or more.

[0011] It is preferable that the above component D is polyethylene glycol.

[0012] It is preferable that the skin cleansing composition of the present invention further contains Component E below. Component E: Polyhydric alcohol condensation type nonionic surfactant

[0013] The skin cleansing composition of the present invention is preferably filled in a pump former container before use. Effect of the Invention

[0014] The skin cleansing composition of the present invention satisfies the above-mentioned requirements, and thus has the effect of exhibiting significantly superior formulation stability. Therefore, the composition can be discharged in a foam form without clogging, and the discharged foam has a fine texture, and the high-quality foam lasts, thereby exhibiting excellent effects in both foam quality and foam durability.

[0015] In addition, since the skin cleansing composition of the present invention has good foam quality, it does not cause irritation during cleansing and has an excellent feel when used, and it also exhibits significantly superior cleaning effects, which are its basic function. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The skin cleansing composition of the present invention is characterized by being discharged in the form of a foam, and contains the following component A, component B, component C, and component D. Component A: Acylated isethionate Component B: Amphoteric surfactant Component C: Anionic surfactants (excluding component A) Component D: Polyhydric alcohol

[0017] Each component used in the skin cleansing composition of the present invention will be described in detail below.

[0018] [Component A] The component A is an acylated isethionate. In the present invention, by using the component A, it is possible to form a good foam when ejected and to maintain the quality of the foam. In addition, it is possible to reduce the irritation during washing and to provide a good feeling when used.

[0019] Examples of the salt constituting the above-mentioned component A include alkali metal salts such as sodium and potassium. Specific examples of the component A include sodium lauroyl isethionate, sodium lauroyl methyl isethionate, sodium cocoyl isethionate, potassium cocoyl isethionate, sodium cocoyl methyl isethionate, etc. These components A may be used alone or in appropriate combination of two or more.

[0020] In the present invention, among the above-mentioned component A, from the viewpoint of forming a better quality foam when dispensed and from the viewpoint of reducing the irritation during washing and exhibiting a better feeling when used, it is preferable to use cocoyl isethionate, and it is more preferable to use sodium cocoyl isethionate.

[0021] In addition, a commercially available product can be used as the above-mentioned component A. The commercially available product of component A is not particularly limited as long as it exhibits the desired effect, even if it is a single raw material or a mixed raw material with other components.

[0022] The content of component A in the skin cleaning composition of the present invention is not particularly limited as long as the desired effect is sufficiently exhibited, but from the viewpoint of forming a good foam when discharged and from the viewpoint of reducing irritation during cleaning and exhibiting a good feeling of use, it is preferably 0.5% by mass or more, more preferably 1% by mass or more, based on 100% by mass of the composition. Also, from the viewpoint of improving the stability of the formulation, it is preferably 8% by mass or less, more preferably 5% by mass or less, based on 100% by mass of the composition. That is, the content of component A in the skin cleaning composition of the present invention is preferably 0.5 to 8% by mass, more preferably 1 to 5% by mass. The content of component A is the amount converted into a pure content.

[0023] [Component B] The component B is an amphoteric surfactant. In the present invention, by using the component B, it is possible to suppress instability of the formulation due to precipitation caused by the component A, and it is possible to eject the formulation in a foam form without clogging. That is, in the present invention, by combining the component A and the component B, it is possible to achieve significantly superior formulation stability.

[0024] Examples of the component B include amino acid type amphoteric surfactants such as glycine type amphoteric surfactants and aminopropionic acid type amphoteric surfactants, and betaine type amphoteric surfactants such as amidopropyl betaine type amphoteric surfactants, aminoacetic acid betaine type amphoteric surfactants and sulfobetaine type amphoteric surfactants. One type of the component B may be used alone, or two or more types may be used in appropriate combination.

[0025] Specific examples of glycine-type amphoteric surfactants include 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, undecyl hydroxyethyl imidazolinium betaine sodium, undecyl carboxymethoxyethyl carboxymethyl imidazolinium betaine sodium, alkyl diamine ethyl glycine hydrochloride, lauryl diaminoethyl glycine sodium, etc. These components may be used alone or in appropriate combination of two or more.

[0026] Specific examples of the aminopropionic acid type amphoteric surfactant include sodium laurylaminopropionate, sodium laurylaminodipropionate, triethanolamine laurylaminopropionate, etc. These components may be used alone or in appropriate combination of two or more.

[0027] Specific examples of amidopropyl betaine type amphoteric surfactants include coconut oil fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, etc. These components may be used alone or in appropriate combination of two or more.

[0028] Specific examples of the aminoacetic acid betaine type amphoteric surfactant include coconut oil alkyl betaine, lauryl dimethyl aminoacetic acid betaine, stearyl dimethyl aminoacetic acid betaine, lauric acid amidopropyl acetic acid betaine, stearyl dihydroxyethyl betaine, etc. These components may be used alone or in appropriate combination of two or more.

[0029] Specific examples of sulfobetaine-type amphoteric surfactants include lauryl hydroxysulfobetaine (lauryl hydroxysultaine), lauramidopropyl hydroxysultaine, cocamidopropyl hydroxysultaine, etc. These components may be used alone or in appropriate combination of two or more.

[0030] In the present invention, among the above-mentioned component B, from the viewpoint of suppressing instability of the preparation, it is preferable to use a betaine-type amphoteric surfactant, it is more preferable to use a sulfobetaine-type amphoteric surfactant, and it is most preferable to use laurylhydroxysulfobetaine.

[0031] In addition, a commercially available product can be used as the above-mentioned component B. The commercially available product of component B is not particularly limited as long as it exhibits the desired effect, even if it is a single raw material or a mixed raw material with other components.

[0032] The content of component B in the skin cleansing composition of the present invention is not particularly limited as long as the desired effect is sufficiently exhibited, but from the viewpoint of suppressing instability of the preparation due to precipitation caused by the above component A, it is preferably 0.5% by mass or more, more preferably 1% by mass or more, based on 100% by mass of the composition. Also, from the viewpoint of usability, it is preferably 8% by mass or less, more preferably 6% by mass or less, based on 100% by mass of the composition. That is, the content of component B in the skin cleansing composition of the present invention is preferably 0.5 to 8% by mass, more preferably 1 to 6% by mass. The content of component B is the amount converted into a pure content.

[0033] In the skin cleansing composition of the present invention, from the viewpoint of further suppressing instability of the formulation due to precipitation caused by the component A, the mass content ratio of the content of the component B to the component A (component B / component A) is preferably prepared to be in the range of 0.5 or more, and more preferably in the range of 0.8 or more. Also, from the viewpoint of suppressing deterioration of the feeling in use, it is preferably prepared to be in the range of 8 or less, and more preferably in the range of 5 or less. That is, in order to exert a significantly excellent formulation stability and feeling in use, it is preferable that the mass content ratio (component B / component A) is prepared to be in the range of 0.5 to 8, and more preferably in the range of 0.8 to 5.

[0034] [Component C] The component C is an anionic surfactant other than the component A. In the present invention, by using the component C, not only is a cleaning effect exerted, but also it is possible to obtain excellent foaming properties and improve the foam quality when discharged in a foam form.

[0035] Examples of the component C include higher fatty acid salts, alkyl ether carboxylates, N-acylsarcosine salts, N-acylglutamates, N-acylmethylalanines, N-acylmethyltaurines, alkanesulfonates, α-olefinsulfonates, alkylsulfosuccinates, alkyl sulfates, alkyl ether sulfates, monoacylglycerol sulfates, monoalkyl phosphates, polyoxyethylene alkyl ether phosphates, etc. One type of component C may be used alone, or two or more types may be used in appropriate combination.

[0036] Specific examples of higher fatty acid salts include sodium laurate, triethanolamine laurate, sodium myristate, triethanolamine myristate, sodium palmitate, triethanolamine palmitate, sodium stearate, triethanolamine stearate, potassium coconut oil fatty acid, arginine coconut oil fatty acid, triethanolamine coconut oil fatty acid, etc. These components may be used alone or in appropriate combination of two or more.

[0037] Specific examples of alkyl ether carboxylates include potassium polyoxyethylene lauryl ether acetate, sodium polyoxyethylene lauryl ether acetate, sodium polyoxyethylene tridecyl ether acetate, etc. These components may be used alone or in appropriate combination of two or more.

[0038] Specific examples of N-acyl sarcosine salts include coconut oil fatty acid sodium sarcosine, coconut oil fatty acid triethanolamine sarcosine, lauroyl sodium sarcosine, lauroyl triethanolamine sarcosine, myristoyl sodium sarcosine, etc. These components may be used alone or in appropriate combination of two or more.

[0039] Specific examples of N-acyl glutamate include sodium coconut oil fatty acid acyl glutamate, triethanolamine coconut oil fatty acid acyl glutamate, potassium lauroyl glutamate, sodium lauroyl glutamate, potassium myristoyl glutamate, sodium myristoyl glutamate, potassium stearoyl glutamate, sodium stearoyl glutamate, etc. These components may be used alone or in appropriate combination of two or more.

[0040] Specific examples of N-acylmethylalanine salts include sodium coconut oil fatty acid methylalanine, sodium lauroylmethylalanine, triethanolamine lauroylmethylalanine, sodium myristoylmethylalanine, etc. These components may be used alone or in appropriate combination of two or more.

[0041] Specific examples of N-acyl methyl taurine salts include sodium coconut oil fatty acid methyl taurate, potassium coconut oil fatty acid methyl taurate, sodium lauroyl methyl taurate, sodium myristoyl methyl taurate, sodium palmitoyl methyl taurate, sodium stearoyl methyl taurate, sodium oleoyl methyl taurate, etc. These components may be used alone or in appropriate combination of two or more.

[0042] Specific examples of the alkane sulfonate include sodium alkane sulfonate, etc. Specific examples of the α-olefin sulfonate include sodium tetradecene sulfonate, etc. These components may be used alone or in appropriate combination of two or more.

[0043] Specific examples of alkyl sulfosuccinates include sodium di(2-ethylhexyl)sulfosuccinate, disodium lauryl sulfosuccinate, disodium polyoxyethylene lauryl sulfosuccinate, disodium polyoxyethylene alkyl(12-14)sulfosuccinate, etc. These components may be used alone or in appropriate combination of two or more.

[0044] Specific examples of alkyl sulfate salts include sodium lauryl sulfate, triethanolamine lauryl sulfate, sodium myristyl sulfate, sodium stearyl sulfate, sodium oleyl sulfate, sodium cetyl sulfate, etc. These components may be used alone or in appropriate combination of two or more.

[0045] Specific examples of alkyl ether sulfates include sodium polyoxyethylene lauryl ether sulfate, triethanolamine polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene myristyl ether sulfate, etc. These components may be used alone or in appropriate combination of two or more.

[0046] Specific examples of monoacylglycerol sulfate include sodium hydrogenated coconut oil fatty acid glyceryl sulfate. Specific examples of monoalkyl phosphate include sodium lauryl phosphate, sodium cetyl phosphate, diethanolamine cetyl phosphate, etc. These components may be used alone or in appropriate combination of two or more.

[0047] Specific examples of polyoxyethylene alkyl ether phosphate salts include sodium polyoxyethylene lauryl ether phosphate, sodium polyoxyethylene cetyl ether phosphate, sodium polyoxyethylene oleyl ether phosphate, sodium polyoxyethylene alkylphenyl ether phosphate, triethanolamine polyoxyethylene alkylphenyl ether phosphate, etc. These components may be used alone or in appropriate combination of two or more.

[0048] In the present invention, among the above-mentioned component C, from the viewpoint of exhibiting significantly superior foaming power when discharged in foam form, and from the viewpoint of exhibiting superior cleaning effect, it is preferable to use N-acyl glutamate, N-acyl methyl taurine salt, or alkyl sulfosuccinate, and it is more preferable to use alkyl sulfosuccinate.

[0049] In addition, a commercially available product can be used as the above-mentioned component C. The commercially available product of component C is not particularly limited as long as it exhibits the desired effect, even if it is a single raw material or a mixed raw material with other components.

[0050] The content of component C in the skin cleansing composition of the present invention is not particularly limited as long as the desired effect is sufficiently exhibited, but from the viewpoint of exhibiting a significantly superior foaming power in the form discharged in foam form and from the viewpoint of exhibiting a superior cleaning effect, it is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, based on 100% by mass of the composition. Also, from the viewpoint of reducing deterioration of the feeling of use due to irritation, etc., it is preferably 5% by mass or less, more preferably 3% by mass or less, based on 100% by mass of the composition. That is, the content of component C in the skin cleansing composition of the present invention is preferably 0.1 to 5% by mass, more preferably 0.5 to 3% by mass. The content of component C is the amount converted into a pure content.

[0051] [Component D] The component D is a polyhydric alcohol. In the present invention, by using the component D, it is possible to further improve the fine foam quality and to increase the persistence of the ejected foam, that is, the so-called foam retention.

[0052] Specific examples of component D include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, isoprene glycol, dipropylene glycol, polyethylene glycol, 1,3-butylene glycol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol, glycerin, diglycerin, polyglycerin, sorbitol, maltitol, trehalose, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, etc. One type of these components D may be used alone, or two or more types may be used in appropriate combination.

[0053] In the present invention, from the viewpoint of further improving the foam quality and enhancing the foam retention, it is preferable to use diglycerin, sorbitol, or polyethylene glycol, and it is more preferable to use polyethylene glycol, among the above-mentioned component D. The number average molecular weight of the polyethylene glycol suitably used is not particularly limited as long as the desired effect is sufficiently exhibited, but from the viewpoint of maximizing the effect of the present invention, it is preferably 1,000 to 20,000, and more preferably 10,000 to 20,000.

[0054] In addition, a commercially available product can be used as the above-mentioned component D. The commercially available product of component D is not particularly limited as long as it exhibits the desired effect, even if it is a single raw material or a mixed raw material with other components.

[0055] The content of component D in the skin cleansing composition of the present invention is not particularly limited as long as the desired effect is sufficiently exhibited, but generally, from the viewpoint of further improving the foam quality and enhancing the foam retention, it is preferably 0.1 mass% or more, more preferably 0.5 mass% or more, in 100 mass% of the composition. Also, from the viewpoint of reducing the deterioration of the feeling of use such as stickiness, it is preferably 7 mass% or less, more preferably 5 mass% or less, in 100 mass% of the composition. That is, the content of component D in the skin cleansing composition of the present invention is preferably 0.1 to 7 mass%, more preferably 0.5 to 5 mass%. The content of component D is the amount converted into a pure content.

[0056] [Component E] The skin cleansing composition of the present invention preferably further contains a polyhydric alcohol condensation type nonionic surfactant as component E. By using the above component E, it is possible to further improve the foaming ability and foam quality of the discharged foam.

[0057] Examples of the component E include fatty acid alkanolamides, alkyl glucosides (also called alkyl polyglucosides), etc. One type of the component E may be used alone, or two or more types may be used in appropriate combination.

[0058] Specific examples of fatty acid alkanolamides include lauric acid diethanolamide, lauric acid monoisopropanolamide, lauric acid myristic acid diethanolamide, stearic acid monoethanolamide, stearic acid diethanolamide, oleic acid diethanolamide, coconut oil fatty acid monoethanolamide, coconut oil fatty acid diethanolamide, etc. These components may be used alone or in appropriate combination of two or more.

[0059] Specific examples of alkyl glucosides include caprylyl / capryl glucoside, lauryl glucoside, decyl glucoside, coconut oil alkyl glucoside, etc. These components may be used alone or in appropriate combination of two or more.

[0060] In the present invention, among the above-mentioned component E, from the viewpoint of further improving the foaming ability and foam quality of the ejected foam, it is preferable to use an alkyl glucoside, and it is more preferable to use decyl glucoside.

[0061] In addition, a commercially available product can be used as the above-mentioned component E. The commercially available product of component E is not particularly limited as long as it exhibits the desired effect, even if it is a single raw material or a mixed raw material with other components.

[0062] The content of component E in the skin cleansing composition of the present invention is not particularly limited as long as the desired effect is sufficiently exhibited, but from the viewpoint of further enhancing the foamability and foam quality of the discharged foam, it is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, based on 100% by mass of the composition. Also, from the viewpoint of reducing deterioration of the feeling of use such as irritation and stickiness, it is preferably 5% by mass or less, more preferably 3% by mass or less, based on 100% by mass of the composition. That is, the content of component E in the skin cleansing composition of the present invention is preferably 0.1 to 4% by mass, more preferably 0.3 to 2% by mass. The content of component E is the amount converted into a pure content.

[0063] [Other ingredients] In addition to the above-mentioned components, the skin cleansing composition of the present invention may contain surfactants, higher alcohols, lower alcohols, cooling agents, water-soluble thickeners, fragrances, powders, colorants, antioxidants, preservatives, UV absorbers, inorganic pigments, pearlizing agents, vitamins, animal and plant extracts, sequestering agents, purified water, etc., depending on the purpose and use, as long as the effects of the present invention are not impaired. The above-mentioned other components may be used alone or in combination of two or more. The above-mentioned other components exclude those contained in the above-mentioned components A, B, C, D, and E.

[0064] The method for producing the skin cleansing composition of the present invention is not particularly limited, but may be, for example, a known method. Specifically, for example, the above-mentioned components are mixed and stirred using a paddle mixer, a dispersing mixer, or the like, but the present invention is not limited to these production methods.

[0065] The properties of the skin cleansing composition of the present invention are not particularly limited so long as the desired effect is sufficiently exhibited, and the composition may be in any form of liquid, gel, emulsion, or cream, although from the viewpoint of being discharged in foam form, it is preferable that the composition be in liquid form.

[0066] The skin cleansing composition of the present invention may be filled into any container as long as it is discharged in foam form, and examples of such containers include aerosol containers, squeeze foamer containers, and pump foamer containers. In the present invention, it is preferable to fill a high-quality foam with excellent foaming properties into a pump foamer container that can discharge a constant amount at low cost and easily. The pump foamer container that can be used in the present invention is not particularly limited, and examples of such pump foamer containers include commercially available pump foamer containers. By filling the skin cleansing composition of the present invention into a pump foamer container, a product used for skin cleansing can be produced.

[0067] The area to which the skin cleansing composition of the present invention is applied is not particularly limited as long as it can exert a cleansing effect, and examples thereof include the face (e.g., forehead, eyes, corners of the eyes, cheeks, mouth, etc.), arms, elbows, backs of hands, fingertips, feet, knees, heels, neck, armpits, back, etc. That is, the skin cleansing composition of the present invention can be suitably used as a cosmetic for body cleansing. The skin cleansing composition of the present invention may be any of cosmetics, quasi-drugs, and pharmaceuticals. EXAMPLES

[0068] The present invention will be described in more detail below based on examples, but the present invention is not limited to these examples. The amounts of ingredients are expressed in "mass %" unless otherwise specified, and the amounts of ingredients in the tables are all values ​​converted to pure contents. In addition, all evaluations were performed at a constant temperature (25±2°C).

[0069] (Sample preparation) According to the formulations shown in Tables 1 and 2, skin cleansing compositions of Examples 1 to 8 and Comparative Examples 1 to 8 were prepared in a conventional manner and subjected to the following evaluation tests. The results are shown in Tables 1 and 2, respectively.

[0070] (Test Example 1: Evaluation of formulation stability) Each sample obtained in the Examples and Comparative Examples was sealed in a transparent glass container (a 100 mL mayonnaise bottle) and then stored in a thermostatic chamber at 5°C for one week. After the storage period, each sample was removed from the thermostatic chamber and allowed to stand at room temperature for six hours, after which the appearance was visually observed and evaluated according to the following evaluation criteria. In the present invention, "room temperature" means 1 to 30°C.

[0071] <Evaluation criteria for formulation stability> ○ (Good): No precipitation or sedimentation is observed. △ (Insufficient): Slight precipitation or sedimentation is observed. × (bad): Clear precipitation or sediment is observed.

[0072] In the evaluation of formulation stability in the above Test Example 1, each sample that gave a result of "◯ (good)" or "Δ (inadequate)" was subjected to the following test.

[0073] (Test Example 2: Evaluation of foam during discharge) Each sample obtained in the Examples and Comparative Examples was filled into a 400 mL pump foamer container. Next, the "foam quality" of the foam discharged on the third push was visually evaluated and scored according to the following evaluation points of 1 to 5. The evaluation was carried out by five expert evaluators, and the evaluation points were determined according to the following judging criteria from the average of the evaluation points of each evaluator. The evaluation criteria for "foam quality" were such that the finer the foam texture, the higher the score.

[0074] <Evaluation criteria> 5 points: very good 4 points: Good 3 points: normal 2 points: Defective 1 point: Very poor

[0075] <Judgment criteria> ◎:Average 4.0 or more ○: Average 3.0 or more and less than 4.0 △: Average 2.0 or more and less than 3.0 ×: Average less than 2.0

[0076] (Test Example 3: Evaluation during and after cleaning) Each sample obtained in the examples and comparative examples was filled into a 400 mL pump foamer container. Next, a usage test was conducted in which the foam discharged on the third push was used to wash the upper forearm (arm) of one arm with one palm, and a sensory evaluation was conducted on the "foam retention" and "irritation" during washing, as well as the "cleaning effect" after towel drying. Scoring was performed according to the same evaluation criteria as in Test Example 2, and a judgment was made according to the criteria.

[0077] The evaluation criteria for "foam retention" were the better the foam retention during cleansing (the more foam remains between the palm and the skin of the arm when the cleansing is spread), the higher the score. The evaluation criteria for "irritation" were the higher the score, the lower the irritation felt during cleansing. The evaluation criteria for "cleaning effect" were the higher the score, the stronger the feeling that dirt such as sebum was removed.

[0078] [Table 1]

[0079] [Table 2]

[0080] From the results shown in Tables 1 and 2, it can be seen that the skin cleansing compositions of the present invention obtained in each Example, compared to those obtained in each Comparative Example, exhibit significantly superior formulation stability without precipitation or sedimentation caused by component A. This shows that a fine foam can be discharged from the pump foamer container without clogging, the discharged foam has good foam retention, is non-irritating, has an excellent feel when used, and exhibits a good cleaning effect.

[0081] In contrast, in Comparative Examples 3 and 4, which do not contain component B, an essential component of the present invention, the formulation stability is significantly inferior. Also, in Comparative Examples not containing other essential components, the unique effects of the present invention cannot be fully exhibited. As is clear from these results, it can be said that the present invention exhibits satisfactory effects in all of "formulation stability," "foam quality," and "usage feel" only when the essential components are satisfied.

Claims

1. A skin cleansing composition that is discharged in foam form, A skin cleansing composition comprising the following components A, B, C and D: Component A: Acylated isethionate Component B: Amphoteric surfactant Component C: Anionic surfactant (excluding component A) Component D: Polyhydric alcohol

2. 2. The skin cleansing composition according to claim 1, wherein said component B is a betaine-type amphoteric surfactant.

3. 3. The skin cleansing composition according to claim 1, wherein the mass content ratio of the content of the component B to the content of the component A (component B / component A) is 0.5 or more.

4. 3. The skin cleansing composition according to claim 1, wherein the component D is polyethylene glycol.

5. The skin cleansing composition according to claim 1 or 2, further comprising the following component E: Component E: Polyhydric alcohol condensation type nonionic surfactant

6. 3. The skin cleansing composition according to claim 1, which is filled in a pump former container for use.

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