Composition for skin cleansing

Abstract

To provide a composition for skin cleansing that can prevent sedimentation and aggregation of powder components which impair formulation stability and foam characteristics, enable uniform dispersion of the powder components, and sustain the dispersion state.SOLUTION: A composition for skin cleansing containing a powder component, characterized by comprising Component A: an anionic surfactant (excluding Component D), Component B: an amphoteric surfactant, Component C: an acrylates copolymer, and Component D: an acyl isethionate salt.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Conventionally, in order to further enhance the cleansing effect, skin cleansers have incorporated, in addition to the main cleansing ingredients such as surfactants, powder ingredients such as scrubbing agents that remove old keratin and sebum stains through moderate friction, and adsorbent removers that adsorb and remove sweat, sebum, etc. However, while these powder ingredients enhance the cleansing effect, they have the disadvantage of being prone to sedimentation and aggregation due to their physical properties, which has a negative impact on formulation stability and foam quality, and therefore there is a demand for formulation technology that can maintain uniform dispersion throughout the composition.

[0003] In the field of skin cleansers, various attempts have been made to improve the dispersion stability of powder components. Specifically, proposals have included detergent compositions with improved dispersion stability of charcoal (see, for example, Patent Documents 1 and 2), liquid detergent compositions with improved dispersion stability of silicon (see, for example, Patent Document 3), and liquid scrub detergents with improved dispersion stability of resin powder (see, for example, Patent Document 4). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-172187 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-167325 [Patent Document 3] Japanese Patent Application Laid-Open No. 2000-319698 [Patent Document 4] Japanese Patent Application Publication No. 07-304651

[0005] Meanwhile, in recent years, in the technical field of skin cleansers, pump-type containers that can be easily used by people of all ages and genders and that can discharge a constant amount of composition have been widely used. Generally, when using such pump-type containers, compositions that are prone to settling or aggregation of powder components tend to be avoided due to the risk of discharge defects such as "clogging" or "inability to discharge a constant amount" during discharge. Therefore, there has been a demand for the development of a skin cleanser containing powder components that can withstand the expected risks even when filled into a pump-type container. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in view of the above-mentioned conventional techniques, and aims to provide a skin cleansing composition that can suppress the settling and aggregation of powder components, which have an adverse effect on formulation stability and foam quality, and can uniformly disperse the powder components and maintain that dispersed state. [Means for solving the problem]

[0007] The present invention provides a skin cleansing composition containing a powder component, characterized in that the skin cleansing composition contains the following component A, component B, component C, and component D: Component A: Anionic surfactants (excluding component D) Component B: Amphoteric surfactant Component C: Acrylates copolymer Component D: Acylated isethionate

[0008] In the skin cleansing composition of the present invention, the above component C is preferably an unneutralized product.

[0009] The skin cleansing composition of the present invention is preferably used by being filled in a pump-type container from which the composition itself is directly discharged. [Effects of the Invention]

[0010] By satisfying the above-mentioned constituent requirements, the skin cleansing composition of the present invention can uniformly disperse powder components without causing sedimentation or aggregation, and can maintain this favorable dispersion state, thereby exhibiting a significantly excellent effect in dispersion stability. This effect is particularly noticeable during high-temperature storage, and can be said to lead to the maintenance of stability during storage of the formulation.

[0011] Furthermore, since the skin cleansing composition of the present invention has good dispersion stability of the powder components, there is no deterioration in foam quality (foaming and foam texture) that would occur due to settling or aggregation of the powder components, and it has the effect of being able to form high-quality foam that is quick to foam and has excellent foaming properties.

[0012] In addition, even if the skin cleansing composition of the present invention is filled into a pump-type container and used, there is no settling or aggregation of the powder components and it has excellent dispersion stability, so it can be said that there is no risk of discharge defects such as ``clogging'' or ``inability to discharge a constant amount.'' DETAILED DESCRIPTION OF THE INVENTION

[0013] The powder component-containing skin cleansing composition of the present invention contains the following component A, component B, component C, and component D. Component A: Anionic surfactants (excluding component D) Component B: Amphoteric surfactant Component C: Acrylates copolymer Component D: Acylated isethionate

[0014] Each component used in the skin cleansing composition of the present invention will be described in detail below.

[0015] The skin cleansing composition of the present invention contains a powder component. Note that the powder component in this invention does not refer to a powder component that is solubilized, but rather to a component that remains in particulate form in the composition. The powder component of the present invention also includes a powder component that is not solubilized.

[0016] Examples of the powder component to be used include a scrubbing agent that removes old keratin and sebum stains by moderate friction and also provides a moderate massage effect, or an adsorption remover that adsorbs and removes sweat, sebum, etc. The average particle size of the powder component such as the scrubbing agent or adsorption remover is not particularly limited as long as it is appropriately selected depending on the desired effect.

[0017] Specific powder components include, for example, inorganic powders such as talc, silica, clay, mica, kaolin, diatomaceous earth, hydroxyapatite, zinc oxide, titanium oxide, aluminum oxide (alumina), magnesium oxide, calcium oxide, and zirconium oxide; polysaccharides such as glucomannan, starch, cellulose, and sucrose; crushed particles of plant seeds and skins such as apricot seeds, nut shells, and walnut shells; bamboo charcoal, etc. These powder components may be used alone or in appropriate combinations of two or more.

[0018] The powder component may be a commercially available product, and may be a single raw material or a mixed raw material with other components, as long as it exhibits the desired effect.

[0019] The content of the powder component in the skin cleansing composition of the present invention is not particularly limited as long as the desired effect is sufficiently exhibited, but it is usually preferably 0.05 to 2.5% by mass, more preferably 0.1 to 2% by mass, from the viewpoint of providing a moderate massage effect by removing old keratin and sebum dirt by friction, and from the viewpoint of absorbing and removing sweat, sebum, etc. The content of the powder component is the amount converted into a pure content.

[0020] [Component A] Component A is an anionic surfactant excluding component D, which will be described later. In the present invention, the use of component A not only produces high-quality foam and exhibits an excellent cleansing effect, but also enhances the storage stability of the formulation when used in combination with component B, which will be described later, and improves the dispersibility of the powder components.

[0021] Examples of Component A include higher fatty acid salts, alkyl ether carboxylates, N-acyl sarcosine salts, N-acyl glutamates, N-acyl methyl alanine salts, N-acyl methyl taurine salts, alkanesulfonates, α-olefin sulfonates, alkyl sulfosuccinates, alkyl sulfates, alkyl ether sulfates, monoacyl glycerin sulfates, monoalkyl phosphates, polyoxyethylene alkyl ether phosphates, etc. One of these Component A may be used alone, or two or more may be used in appropriate combination.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Specific examples of N-acylmethylalanine salts include coconut oil fatty acid methylalanine sodium, lauroylmethylalanine sodium, lauroylmethylalanine triethanolamine, myristoylmethylalanine sodium, etc. These components may be used alone or in appropriate combination of two or more.

[0027] 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.

[0028] Specific examples of alkanesulfonates include sodium alkanesulfonate.Specific examples of α-olefinsulfonates include sodium tetradecenesulfonate.These components may be used alone or in appropriate combination of two or more.

[0029] 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.

[0030] Specific examples of alkyl sulfate ester 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.

[0031] Specific examples of alkyl ether sulfates include polyoxyethylene lauryl ether sodium sulfate, polyoxyethylene lauryl ether triethanolamine sulfate, polyoxyethylene myristyl ether sodium sulfate, etc. These components may be used alone or in appropriate combination of two or more.

[0032] Specific examples of monoacylglycerol sulfates include sodium hydrogenated coconut oil fatty acid glyceryl sulfate. Specific examples of monoalkyl phosphates include sodium lauryl phosphate, sodium cetyl phosphate, and diethanolamine cetyl phosphate. These components may be used alone or in appropriate combination of two or more.

[0033] Specific examples of polyoxyethylene alkyl ether phosphate ester salts include polyoxyethylene lauryl ether sodium phosphate, polyoxyethylene cetyl ether sodium phosphate, polyoxyethylene oleyl ether sodium phosphate, polyoxyethylene alkylphenyl ether sodium phosphate, polyoxyethylene alkylphenyl ether triethanolamine phosphate, etc. These components may be used alone or in appropriate combination of two or more.

[0034] In the present invention, among the above-mentioned component A, from the viewpoint of forming high-quality foam and exerting an excellent cleaning effect, from the viewpoint of enhancing the storage stability of the preparation, and from the viewpoint of improving the dispersibility of the scrubbing agent of component E described below, it is preferable to use N-acylmethylalanine salts, N-acylmethyltaurine salts, alkyl sulfosuccinate salts, and alkyl sulfate ester salts, and it is more preferable to use N-acylmethyltaurine salts and alkyl sulfate ester salts.

[0035] It should be noted that commercially available products can be used as the above-mentioned component A. The commercially available product of component A may be a single raw material or a mixed raw material with other components, and is not particularly limited as long as the desired effect is exhibited.

[0036] The content of component A 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 viewpoints of forming high-quality foam to exhibit an excellent cleansing effect, improving the storage stability of the preparation, and improving the dispersibility of powder components, it is usually preferably 3.5 to 7.5 mass%, more preferably 4 to 6.5 mass%. Note that the content of component A above is the amount converted to a pure content.

[0037] [Component B] Component B is an amphoteric surfactant. In the present invention, the use of component B not only produces high-quality foam and exhibits an excellent cleansing effect, but also enhances the storage stability of the formulation and improves the dispersibility of the powder components when used in combination with component A.

[0038] Examples of the component B include amino acid amphoteric surfactants such as glycine amphoteric surfactants and aminopropionic acid amphoteric surfactants, and betaine amphoteric surfactants such as amidopropyl betaine amphoteric surfactants, aminoacetic acid betaine amphoteric surfactants and sulfobetaine amphoteric surfactants. One of these components B may be used alone, or two or more may be used in appropriate combination.

[0039] Specific examples of glycine-type amphoteric surfactants include 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, undecylhydroxyethylimidazolinium betaine sodium, undecylcarboxymethoxyethylcarboxymethylimidazolinium betaine sodium, alkyldiamine ethylglycine hydrochloride, lauryldiaminoethylglycine sodium, etc. These components may be used alone or in appropriate combination of two or more.

[0040] Specific examples of aminopropionic acid type amphoteric surfactants include sodium laurylaminopropionate, sodium laurylaminodipropionate, triethanolamine laurylaminopropionate, etc. These components may be used alone or in appropriate combination of two or more.

[0041] 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.

[0042] Specific examples of aminoacetic acid betaine type amphoteric surfactants 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.

[0043] 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.

[0044] In the present invention, among the above-mentioned component B, from the viewpoint of suppressing instability of the formulation, it is preferable to use a betaine-type amphoteric surfactant, it is more preferable to use an amphoteric surfactant of an amphoteric propyl betaine type, and it is most preferable to use coconut oil fatty acid amidopropyl betaine or lauric acid amidopropyl betaine.

[0045] It should be noted that commercially available products can be used as the above-mentioned component B. The commercially available product of component B may be a single raw material or a mixed raw material with other components, and is not particularly limited as long as the desired effect is exhibited.

[0046] 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 viewpoints of forming high-quality foam to exhibit an excellent cleansing effect, improving the storage stability of the preparation, and improving the dispersibility of powder components, it is usually preferably 2 to 6% by mass, more preferably 3 to 5% by mass. Note that the content of component B above is the amount converted to a pure content.

[0047] [Component C] Component C is an acrylate copolymer. In the present invention, by using component C, the powder components can be uniformly dispersed without causing sedimentation or aggregation, and the dispersion stability can be significantly improved, i.e., the favorable dispersion state can be maintained.

[0048] The acrylate copolymer used is a copolymer composed of two or more monomers selected from alkyl acrylate (C1-C4), alkyl methacrylate (C1-C4), acrylic acid, and methacrylic acid, and is a compound known by the INCI name "Acrylates Copolymer."

[0049] Typically, component C is neutralized with an alkanolamine such as triethanolamine or monoethanolamine, or a basic substance such as ammonia, potassium hydroxide, or sodium hydroxide. However, in the skin cleansing composition of the present invention, it is preferable to use the component C as an unneutralized product without neutralizing it with a basic substance, from the viewpoints of improving the formulation stability, uniformly dispersing the powder components, and significantly improving the dispersion stability of the powder components.

[0050] It should be noted that a commercially available product can be used as the above-mentioned component C. The commercially available product of component C may be a single raw material or a mixed raw material with other components, and is not particularly limited as long as the desired effect is exhibited.

[0051] 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 significantly superior dispersion stability, it is usually preferably 1 to 3 mass %, more preferably 1.2 to 2 mass %. Note that the content of component C is the amount converted into a pure content.

[0052] [Component D] Component D is an acylated isethionate. In the present invention, by using component D, it becomes possible to form a high-quality foam that is rapid-foaming and has excellent foaming properties without reducing the foam quality (foaming and foam texture) that would otherwise be caused by settling or aggregation of powder components.

[0053] Examples of salts constituting the above-mentioned component D include alkali metal salts such as sodium and potassium. Specific examples of component D include sodium lauroyl isethionate, sodium lauroyl methyl isethionate, sodium cocoyl isethionate, potassium cocoyl isethionate, and sodium cocoyl methyl isethionate. One type of component D may be used alone, or two or more types may be used in appropriate combination.

[0054] In the present invention, among the above-mentioned Component D, it is preferable to use cocoyl isethionate, and it is more preferable to use sodium cocoyl isethionate, from the viewpoint of forming a high-quality foam that is fast-foaming and has excellent foaming properties.

[0055] It should be noted that commercially available products can be used as the above-mentioned component D. The commercially available product of component D may be a single raw material or a mixed raw material with other components, and is not particularly limited as long as the desired effect is exhibited.

[0056] 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 from the viewpoint of forming good quality foam that is quick to foam and has excellent foaming properties, it is usually preferably 1.5 to 6 mass %, more preferably 2.5 to 5 mass %. The content of component D is the amount converted into a pure content.

[0057] [Other ingredients] In addition to the above-mentioned components, the skin cleansing composition of the present invention may contain surfactants, polyhydric alcohols, 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, and the like, depending on the purpose and application, as long as the effects of the present invention are not impaired. The above-mentioned other components may be used alone or in appropriate combinations of two or more. Note that the above-mentioned other components exclude those included in Component A, Component B, Component C, and Component D.

[0058] The viscosity of the skin cleansing composition of the present invention is not particularly limited as long as the desired effect is sufficiently exhibited. However, from the viewpoint of maintaining the dispersion state of the powder components and exhibiting significantly superior dispersion stability, and ultimately from the viewpoint of exhibiting significantly superior formulation stability, the viscosity is preferably prepared to satisfy the range of 3,000 to 30,000 mPas·s, and more preferably to satisfy the range of 4,000 to 25,000 mPas·s.

[0059] Furthermore, the skin cleansing composition of the present invention exhibits significantly superior dispersion stability without settling or aggregation of powder components, and therefore, even if filled into a pump-type container for use, there is no risk of discharge defects such as "clogging" or "inability to discharge a constant amount." When the skin cleansing composition of the present invention is filled into a pump-type container for use, the viscosity of the composition is not particularly limited as long as the desired effect is fully exhibited, but from the viewpoint of preventing discharge defects, it is preferably prepared so that the viscosity satisfies the range of 4,000 to 20,000 mPas·s, and more preferably the range of 4,500 to 18,000 mPas·s.

[0060] The method for producing the skin cleansing composition of the present invention is not particularly limited, and the composition can be produced by, for example, a known method. Specifically, for example, the above-mentioned components are mixed and stirred using, for example, a paddle mixer, a disper mixer, or the like, but the present invention is not limited to these production methods.

[0061] The form of the skin cleansing composition of the present invention is not particularly limited as long as the desired effect is sufficiently exhibited, and may be any of liquid, viscous liquid, gel, emulsion, and cream forms, but from the viewpoint of exhibiting significantly superior dispersion stability, a viscous liquid, gel, emulsion, or cream form is preferable. Furthermore, when the composition is filled into a pump-type container for use, a viscous liquid or gel form is preferable.

[0062] The skin cleansing composition of the present invention may be filled into any container, as long as the composition can be directly discharged, and examples of such containers include tube containers, bottle containers, pump-type containers, etc. In the present invention, a composition can be prepared that exhibits significantly superior dispersion stability without sedimentation or aggregation of powder components, and therefore pump-type containers can be actively used.

[0063] 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 the hands, fingertips, feet, knees, heels, neck, armpits, and back. 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. [Example]

[0064] The present invention will be described in more detail below based on examples, but the present invention is not limited to these examples. Unless otherwise specified, the blending amounts are expressed in "% by mass," and the blending amounts of all components in the tables are values ​​converted to pure contents. Furthermore, all evaluations were carried out at a constant temperature (25±2°C).

[0065] (Sample preparation) Skin cleansing compositions of Examples 1 to 8 and Comparative Examples 1 to 8 were prepared in accordance with standard methods according to the formulations shown in Tables 1 and 2, and subjected to the following evaluation tests. The results are also shown in Tables 1 and 2, respectively.

[0066] (Test Example 1: Evaluation of dispersion stability (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 40°C for one week. After the storage period, each sample was removed from the thermostatic chamber and allowed to stand at room temperature for one hour, after which the appearance was visually observed and evaluated according to the following evaluation criteria. Note that "room temperature" in the present invention means 1 to 30°C.

[0067] <Evaluation criteria for dispersion stability (formulation stability)> ○ (Good): No settling or aggregation of powder components is observed. △ (Insufficient): Slight settling or aggregation of powder components is observed × (bad): Settling or aggregation of powder components is clearly observed

[0068] (Test Example 2: Discharge Test) Each sample obtained in the Examples and Comparative Examples was filled into a 400 mL pump-type container and then stored in a thermostatic chamber at 40°C for one week. After the storage period, each container was removed from the thermostatic chamber and allowed to stand at room temperature for one hour, after which a discharge test was conducted and evaluated according to the following evaluation criteria. The discharge test was conducted by measuring the amount of discharged liquid to determine whether the specified amount was continuously discharged.

[0069] <Evaluation criteria for discharge test> ○ (Good): No decrease in discharge volume observed (no clogging) × (bad): A decrease in the discharge amount is observed (clogging occurs)

[0070] (Test Example 3: Foam Evaluation) Each sample obtained in the Examples and Comparative Examples was filled into a 400 mL pump container. Next, the composition dispensed on the third pump was placed in the palm of one hand, and the palm and fingertips of the other hand, which had been wetted with warm water, were rubbed together in a circular motion to create a lather.

[0071] When whipping, the "fastness of foaming," "foaming ability," "foam quality," and "foam retention" were visually evaluated and scored on a scale of 1 to 5. The evaluation was carried out by five expert evaluators, and the average score was determined according to the following criteria.

[0072] The evaluation criteria for "fast foaming" were the faster the foam started to form, the higher the score. The evaluation criteria for "foaming ability" were the larger the volume of foam formed, the higher the score. The evaluation criteria for "foam quality" were the finer the texture of the foam, the higher the score. The evaluation criteria for "foam retention" were the better the persistence of the foam formed, the higher the score.

[0073] <Evaluation criteria> 5 points: very good 4 points: Good 3 points: normal 2 points: Defective 1 point: Very poor

[0074] <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

[0075] [Table 1]

[0076] [Table 2]

[0077] The results shown in Tables 1 and 2 show that the skin cleansing compositions of the present invention obtained in each Example, compared to those obtained in each Comparative Example, are able to uniformly disperse the powder components without settling or aggregation during high-temperature storage, and maintain this well-dispersed state, providing excellent dispersion stability and excellent storage stability of the formulation. This effect can also be seen from the fact that no discharge defects such as "clogging" or "inability to discharge a constant amount" occur even when filled into a pump-type container and used.

[0078] Furthermore, the skin cleansing composition of the present invention does not suffer from the deterioration of foam quality (foaming and foam texture) that occurs due to settling or aggregation of powder components, and is capable of forming high-quality foam that is quick to foam and foams well, and the formed foam also has excellent durability.

[0079] In contrast, Comparative Examples 1 to 3 and 8, which do not contain the essential components of the present invention, do not provide fully satisfactory results in terms of dispersion stability, dischargeability, or foam evaluation. As is clear from these results, it can be said that the present invention can only achieve satisfactory effects in terms of dispersion stability, dischargeability, and foam evaluation by containing the essential components.

[0080] In addition, in Comparative Examples 4 to 7, in which component C, an essential component of the present invention, was replaced with another component, the foam quality was maintained to a certain extent, but the dispersion stability was poor, and when using a pump-type container, a decrease in the discharge rate due to clogging was observed. This result also shows the importance of the combination of essential components of the present invention.

Claims

1. A skin cleansing composition containing a powder component, A skin cleansing composition comprising the following components A, B, C, and D: Component A: Anionic surfactant (excluding component D) Component B: Amphoteric surfactant Component C: Acrylates copolymer Component D: Acylated isethionate

2. 2. The skin cleansing composition according to claim 1, wherein the component C is an unneutralized product.

3. 3. The skin cleansing composition according to claim 1, wherein the composition is filled in a pump-type container from which the composition itself is directly discharged.

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