JP6860982B2 - Liquid skin cleanser composition - Google Patents

Description

The present invention relates to a liquid skin cleansing composition.

The form of the cleaning agent includes solid, liquid, foamy and the like, and in recent years, a liquid cleaning agent of the type discharged in the form of foam has been widely used. As a cleaning base widely used as a liquid cleaning agent, an N-acylamino acid-based anionic surfactant is known from the viewpoints of mildness to the skin, safety, and security.
However, liquid detergents using N-acylamino acid-based anionic surfactants as cleaning bases are not sufficiently satisfactory in terms of low-temperature stability and foam quality, and therefore, they are suitable for N-acylamino acid-based anionic surfactants. In addition, a liquid detergent composition in a former container containing 30 to 50% by mass of polyhydric alcohol and an amphoteric surfactant (Patent Document 1), an N-acylamino acid-based anionic surfactant, and an amphoteric surfactant. In addition to a liquid cleaning composition (Patent Document 2) containing polyethylene glycol and an N-acylamino acid-based anionic surfactant, an anionic surfactant having a crafting point of 20 ° C. or higher, an amphoteric surfactant and a polyhydric alcohol are added. A detergent composition containing a former container (Patent Document 3) has been reported.

Japanese Unexamined Patent Publication No. 2010-59247 Japanese Unexamined Patent Publication No. 2009-120546 Japanese Unexamined Patent Publication No. 2006-183039

However, even in the liquid skin cleansing composition described in Patent Documents 1 to 3, the low temperature stability and foam quality are not yet sufficient, and further, the cleansing power against sebum stains and the feel of the skin after washing are sufficient. It is not satisfactory, and a skin cleansing composition having both these performances and foam retention during washing has not been obtained.
Therefore, the subject of the present invention is a liquid skin cleansing agent composition that has good low-temperature stability, excellent cleansing power against sebum stains, etc., has good foam quality and foam retention during washing, and can impart a moist feeling to the skin after washing. To provide things.

Therefore, the present inventor has added 0.1 to 28% by mass of polyhydric alcohol in addition to an amphoteric surfactant and water to a liquid detergent composition using an N-acylamino acid anionic surfactant as a cleaning base. Furthermore, by blending polyoxyethylene alkyl ether sulfate with this, surprisingly, it has good low temperature stability, excellent detergency against skin stains, etc., and has good foam quality and foam retention during cleaning. The present invention has been completed by finding that a liquid skin cleansing composition capable of imparting a moist feeling to the skin after washing can be obtained.

That is, the present invention contains the following components (A) to (E), and the content mass ratio (B / D) of the component (B) to the component (D) is 0.1 or more and 1.5 or less. It provides a liquid skin cleansing composition.
(A) N-acylamino acid-based anionic surfactant (B) amphoteric surfactant (C) polyoxyethylene alkyl ether sulfate (D) polyhydric alcohol 0.1 to 28% by mass
(E) Water

The liquid skin cleansing composition of the present invention has good low-temperature stability, excellent cleansing power against skin stains, etc., has good foam quality and foam retention during washing, and further gives a good moist feeling to the skin after washing. Can be granted.

The component (A) used in the liquid skin cleansing composition of the present invention is an N-acylamino acid-based anionic surfactant. The component (A) is used as a cleaning base. Specifically, N-acylamino acid or a salt thereof is used.

The acyl group of the N-acyl amino acid or a salt thereof is preferably derived from a fatty acid having a saturated or unsaturated linear or branched chain having 8 to 18 carbon atoms from the viewpoint of improving foaming and the like, and has 8 to 18 carbon atoms. Those derived from fatty acids having 16 saturated or unsaturated linear or branched chains are more preferable, and those derived from fatty acids having saturated or unsaturated linear or branched chains having 8 to 14 carbon atoms are further preferable. preferable. Examples of such fatty acids include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid and the like. Among these fatty acids, at least one selected from lauric acid, myristic acid, palmitic acid, and oleic acid is preferable, and lauric acid is more preferable, from the viewpoint of improving foam quality and storage stability. Further, the acyl group of the N-acyl amino acid may be derived from the above-mentioned mixed fatty acid of fatty acid, for example, a fatty acid derived from coconut oil, palm kernel oil or the like as a raw material. Among them, those derived from coconut oil fatty acid and palm kernel fatty acid are preferable, and those derived from coconut oil fatty acid are more preferable.

The amino acid portion of N-acylamino acid or a salt thereof is selected from glycine and alanine from the viewpoints of good foam quality that allows the foam to slide smoothly on the skin and a good feeling of use that makes the washed skin soft and moist. Neutral amino acids and acidic amino acids selected from glutamic acid and aspartic acid are preferable, acidic amino acids are more preferable, and glutamic acid is further preferable. Further, these amino acid portions may be any of D-form, L-form, or a mixture of D-form and L-form, and are preferably L-form.

The N-acylamino acid or a salt thereof may be used alone or in combination of two or more. Among them, N-lauroyl-L-glutamic acid and N-myristoyl-L- from the viewpoint of good foam quality that is slippery and easy to spread on the skin and soft and moist feeling of the washed skin. Glutamic acid, N-palm oil fatty acid acyl-L-glutamic acid, N-palm fatty acid acyl-L-glutamic acid, N-lauroyl-L-aspartic acid, N-palm oil fatty acid acyl-L-glycine, N-palm oil fatty acid acyl- At least one selected from L-alanine and salts thereof is preferable, and N-lauroyl-L-glutamic acid, N-myristoyl-L-glutamic acid, N-palm oil fatty acid acyl-L-glutamic acid, N-palm fatty acid acyl- At least one selected from L-glutamic acid, N-lauroyl-L-aspartic acid, N-coconut oil fatty acid acyl-L-glycine, N-palm oil fatty acid acyl-L-alanine and salts thereof is more preferable, and N More preferably at least one selected from −lauroyl glutamic acid, N-myristoyl glutamic acid, N-palm oil fatty acid acyl-L-glutamic acid, N-lauroyl glutamic acid, N-palm oil fatty acid acyl-L-alanine and salts thereof. , N-Palm oil fatty acid acyl-L-glutamic acid, N-lauroyl aspartic acid and at least one selected from salts thereof are more preferable, and N-palm oil fatty acid acyl-L-glutamic acid, N-palm oil fatty acid acyl- At least one selected from L-alanine and salts thereof is more preferable, and those containing N-palm oil fatty acid acyl-L-alanine and salts thereof are further preferable.
That is, from the viewpoint of good foam quality that is slippery and easy to spread on the skin and soft and moist feeling of use of the washed skin, N-coconut oil fatty acid acyl-L-in the component (A). The total content of one or more selected from alanine, N-coconut oil fatty acid acyl-L-glutamic acid and salts thereof is preferably 60% by mass or more, more preferably 80% by mass or more, and 90% by mass. % Or more, more preferably 99% by mass or more, still more preferably 100% by mass, and the component (A) is N-coconut oil fatty acid acyl-L-alanine and theirs. It is even more preferable to contain substantially 100% by mass of the salt. In addition, here, "substantial" means that an unavoidable substance mixed from a raw material or the like is not regarded as a component (A).

Note: As the salt of N-acylamino acid, from the viewpoint of ensuring foaming and foam quality, alkali metal salts such as sodium and potassium; alkaline earth metal salts such as calcium and magnesium; other machine salts such as aluminum and zinc; Ammonium salts; Organic amine salts such as monoethanolamine, diethanolamine, triethanolamine, AMP (2-amino-2-methyl-1-propanol), 2-amino-2-hydroxymethyl-1,3-propanediol; arginine , Other organic salts such as basic amino acid salts such as lysine, histidine, ornithine. As the salt of N-acylamino acid, at least one selected from alkali metal salt, triethanolamine salt, and arginine salt is preferable from the viewpoint of ensuring foaming and foam quality, and from the viewpoint of skin irritation and availability. At least one selected from sodium salt, potassium salt, triethanolamine salt, and arginine salt is more preferable, at least one selected from sodium salt and potassium salt is more preferable, and sodium salt is even more preferable.

When N-acylamino acid is blended, it is neutralized with a base before use. Bases to be neutralized include sodium hydroxide, potassium hydroxide, monoethanolamine, triethanolamine, diethanolamine, ammonia, AMP (2-amino-2-methyl-1-propanol), 2-amino-2-hydroxymethyl. Examples thereof include -1,3-propanediol, lysine, arginine, histidine, sodium acetate, potassium acetate, etc., and sodium salts from the viewpoint of ensuring foaming and foaming, foaming and foaming, and skin irritation and availability. , Potassium hydroxide, arginine salt, triethanolamine salt, one or two bases selected from sodium hydroxide, potassium hydroxide, arginine, and triethanolamine are preferable, and sodium hydroxide and potassium hydroxide are selected. One or two bases are more preferable. If necessary, additional general sodium hydroxide, potassium hydroxide, triethanolamine, ammonia, lysine, arginine, histidine, etc. are used so that the pH of the liquid cleaning agent finally reaches the desired value. Various bases may be used. In any case, in order to adjust the pH of the liquid cleaning agent, various general acids such as hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, citric acid, malic acid, lactic acid, fumaric acid, and succinic acid are added. May be used as a target.

The content of the component (A) in the liquid skin cleansing composition is preferably 0.1% by mass or more, preferably 0.2% by mass or more, from the viewpoint of improving foaming, foaming during washing, and low temperature stability. More preferably, 0.5% by mass or more is further preferable, 1% by mass or more is further preferable, 20% by mass or less is preferable, 18% by mass or less is more preferable, 15% by mass or less is further preferable, and 10% by mass or less. Is even more preferable. The specific range of the content of the component (A) is preferably 0.1 to 20% by mass, more preferably 0.2 to 18% by mass, further preferably 0.5 to 15% by mass, and 1 to 10% by mass. % Is even more preferable.

The component (B) used in the present invention is an amphoteric surfactant. The amphoteric surfactant may be any of those used in ordinary skin cleaning agents. For example, betaine acetate-type surfactants such as lauryldimethylaminoacetic acid betaine and amine oxide-type surfactants such as lauryldimethylamine oxide. Agents, imidazolinium betaine-type surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, amide betaine-type surfactants such as amide propyl betaine laurate, lauryl hydroxysulfobetaine and the like. Examples thereof include sulfobetaine type surfactants.
Of these, at least one selected from a sulfobetaine type surfactant and an amide betaine type surfactant is preferable from the viewpoint of improving low temperature stability, detergency, foam quality, and foam retention during washing, and the sulfobetaine type is preferable. Among the surfactants, alkylhydroxysulfobetaines such as laurylhydroxysulfobetaine are preferable, and among the amide betaine type surfactants, alkylamide propyl betaines such as amide propyl betaine laurate are preferable.

The content of the component (B) in the liquid skin cleaning agent composition is preferably 0.5% by mass or more, preferably 0.75% or more, from the viewpoint of improving low temperature stability, detergency, foam quality, and foam retention during cleaning. More preferably, it is more preferably 1% by mass or more, further preferably 1% by mass or more, further preferably 1.5% by mass or more, still more preferably 15% by mass or less, still more preferably 12% by mass or less, still more preferably 10% by mass or less. 8% by mass or less is even more preferable. The specific range of the content of the component (B) is preferably 0.5 to 15% by mass, more preferably 0.75 to 12% by mass, further preferably 1 to 15% by mass, and 1.5 to 8% by mass. % Is even more preferable.

The content mass ratio (B / A) of the component (B) to the component (A) in the liquid skin cleansing composition of the present invention is 0 from the viewpoint of improving foam retention during washing and improving low temperature stability. 2 or more is preferable, 0.3 or more is more preferable, 0.5 or more is further preferable, 0.6 or more is further preferable, 5 or less is preferable, 4 or less is more preferable, and 3.5 or less is further preferable. 3 or less is even more preferable. The specific range of the content mass ratio (B / A) is preferably 0.2 to 5, more preferably 0.3 to 4, still more preferably 0.5 to 3.5, and preferably 0.6 to 3. Even more preferable.

The component (C) used in the present invention is a polyoxyethylene alkyl ether sulfate. Examples of the polyoxyethylene alkyl ether sulfate include compounds represented by the following general formula (1).
R ¹ O (CH ₂ CH ₂ O) _n SO ₃ M ¹ ... (1)
(In the formula, R ¹ represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms, and M ¹ represents a cation selected from alkali metal, alkaline earth metal, ammonium, alkylammonium, alkanolammonium and glucammonium. n indicates the average number of added moles, which is 0.5 to 20.)

In the general formula (1), as R ¹ , an aliphatic hydrocarbon group having 8 to 18 carbon atoms is preferable, and an aliphatic hydrocarbon group having 8 to 18 carbon atoms is preferable from the viewpoint of improving low temperature stability, detergency, foam quality, and foam retention during washing. An aliphatic hydrocarbon group having ~ 16 is preferable, and an aliphatic hydrocarbon group having 10 to 16 carbon atoms is more preferable. Further, an alkyl group or an alkenyl group having 8 to 16 carbon atoms is preferable, an alkyl group or an alkenyl group having 10 to 16 carbon atoms is more preferable, and an alkyl group or an alkenyl group having 10 to 14 carbon atoms is even more preferable.
From the viewpoint of having bubbles during washing and improving low temperature stability, n is preferably 0.5 or more, preferably 12 or less, preferably 5 or less, further preferably 4 or less, and even more preferably 2 or less. The specific range of n is preferably 0.5 to 12, more preferably 0.5 to 5, still more preferably 0.5 to 4, and even more preferably 0.5 to 2.
As M, an alkali metal salt and an ammonium salt are more preferable, an alkali metal salt is further preferable, and a sodium salt is further preferable, from the viewpoint of improving low temperature stability.

Specifically, the component (C) includes polyoxyethylene (1 mol) sodium lauryl ether sulfate, polyoxyethylene (1 mol) sodium myristyl ether sulfate, polyoxyethylene (2 mol) sodium lauryl ether sulfate, and polyoxy. Examples thereof include polyoxyethylene (1-2 mol) sodium alkyl ether sulfate such as ethylene (2 mol) myristyl ether sodium sulfate. In addition, in this specification, the numerical value in parentheses of these compounds means the average addition mole number of ethylene oxide. As the component (C), one of these compounds may be used alone, or two or more of these compounds may be used in combination. The products of the component (C) include Emar 125A [Kao Corporation, polyoxyethylene (1 mol) sodium lauryl ether sulfate] and Emar 227 [Kao Corporation, polyoxyethylene (2 mol) sodium lauryl ether sulfate]. And so on.
The Krafft point of the component (C) is preferably 0 ° C. to 15 ° C., more preferably 5 to 12 ° C., and even more preferably 5 to 12 ° C. from the viewpoint of foaming during washing and improvement of low temperature stability. 8-12 ° C. In the present invention, the crafting points are based on the "Facial Active Agent Handbook" (publisher: Engineering Books Co., Ltd.).

The content of the component (C) in the liquid skin cleansing composition is preferably 0.1% by mass or more, preferably 0.2% by mass, from the viewpoint of foaminess during washing, improvement in low temperature stability, and improvement in cleanability. The above is more preferable, 0.3% by mass or more is further preferable, 0.5% by mass or more is further preferable, 15% by mass or less is preferable, 10% by mass or less is more preferable, and 8% by mass or less is further preferable. More preferably, it is 5% by mass or less. The specific range of the component (C) is preferably 0.1 to 15% by mass, more preferably 0.2 to 10% by mass, further preferably 0.3 to 8% by mass, and 0.5 to 5% by mass. Is even more preferable.

The content mass ratio (B / C) of the component (B) to the component (C) in the liquid skin cleansing composition of the present invention is preferably 0.2 or more, more preferably 0.5 or more, and 0.8 or more. More preferably, 1 or more is further preferable, 20 or less is preferable, 15 or less is more preferable, 10 or less is further preferable, and 5 or less is further preferable. The specific range of B / C is preferably 0.2 to 20, more preferably 0.5 to 15, further preferably 0.8 to 10, and even more preferably 1 to 5.

The component (D) used in the present invention is a polyhydric alcohol. Examples of the polyhydric alcohol include dihydric alcohols such as ethylene glycol, diethylene glycol, hexylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, isoprene glycol, and 1,3-butylene glycol; glycerin, diglycerin, and tri. Trihydric or higher alcohols such as glycerin, tetraglycerin, hexaglycerin, decaglycerin, trimethylpropanol; erythritol, pentaerythritol, dipentaerythritol, glucose, mannose, galactose, sucrose, fructose, maltose, martitol, xylitol, inositol, Examples thereof include sugars such as sorbitan and sorbitol, or sugar alcohols. Of these, propylene glycol, dipropylene glycol, polypropylene glycol, glycerin, 1,3-butylene glycol, are more preferable from the viewpoints of foam retention during washing, improvement of low temperature stability, and improvement of skin feel after washing. At least one selected from sorbitol, more preferably at least one selected from propylene glycol, polypropylene glycol, glycerin, and 1,3-butylene glycol, and even more preferably selected from propylene glycol, polypropylene glycol, and glycerin. It is at least one kind, and it is preferable that it contains at least polypropylene glycol. As the polyhydric alcohol, the above-mentioned ones may be used alone or two or more kinds may be used in combination.

The content of the component (D) in the liquid skin cleaning agent composition is 0.1 to 28% by mass from the viewpoint of foaminess during washing, improvement in low temperature stability, and improvement in skin feel after washing. 1% by mass or more is more preferable, 3% by mass or more is more preferable, 5% by mass or more is further preferable, 8% by mass or more is further preferable, 20% by mass or less is more preferable, 18% by mass or less is more preferable, and 15% by mass or less. More preferably, it is by mass or less. The specific range of the content of the component (D) is 0.1 to 28% by mass, preferably 0.1 to 20% by mass, more preferably 1 to 20% by mass, and further preferably 3 to 18% by mass. Preferably, 5 to 18% by mass is even more preferable, and 8 to 15% by mass is even more preferable.

The content mass ratio (B / D) of the component (B) to the component (D) in the liquid skin cleansing composition of the present invention is 0.1 or more and 0.15 from the viewpoint of ensuring foaming and foam quality. The above is preferable, 0.2 or more is more preferable, 0.4 or more is further preferable, 1.5 or less, 1.3 or less is preferable, 1.0 or less is more preferable, and 0.8 or less is further preferable. preferable. The specific range of the content mass ratio (B / D) is 0.1 to 1.5, preferably 0.15 to 1.3, more preferably 0.2 to 1.0, and 0.4 to 1.0. 0.8 is more preferable.

The component (E) used in the present invention is water. The water content is preferably 1 to 95% by mass, more preferably 20 to 90% by mass in the liquid skin cleansing composition from the viewpoint of improving low temperature stability, detergency, and dischargeability when used as a former container. , 30-90% by mass is more preferable.

In the liquid skin cleansing composition of the present invention, in addition to the above-mentioned essential components, any component usually used in the skin cleansing agent can be used, if necessary, as long as the effect of the present invention is not impaired. .. Examples of these components include surfactants other than the components (A) to (C), lower alcohols such as ethanol and isopropyl alcohol, sugars (derivatives) and amino acids (derivatives), animal and plant (protein) derivatives, and animal and plant extracts. Moisturizing ingredients such as substances, inorganic or organic salts such as sodium hydrogensulfate, sodium carbonate, sodium hydrogencarbonate, potassium chloride, sodium chloride, sodium citrate, pH regulators such as acids and alkalis, glycyrrhetinic acid, glycyrrhizinic acid and derivatives thereof. Anti-inflammatory agents such as, triclosan, bactericides such as isopropylmethylphenol, preservatives, chelating agents, antioxidants, UV absorbers, anionic polymers, cationic polymers, nonionic polymers, amphoteric polymers, Examples thereof include fragrances, thickeners, vitamins, natural pigments such as chlorophyll and β-carotene, and colorants such as tar pigments.

Further, as a surfactant other than the components (A) to (C), from the viewpoint of improving the moist feeling after cleaning and the detergency against stains, (F) the ether carboxylic acid represented by the following general formula (2) or its above. It is preferable to use salt.
R ^2- O- (CH ₂ CH ₂ O) _m- CH _2- COMM ² ... (2)
(In the formula, R ² indicates an aliphatic hydrocarbon having 4 to 22 carbon atoms, m indicates an average addition molar number of 0 to 20, and M ² indicates a hydrogen atom, an alkali metal, an alkaline earth metal, an ammonium or an organic substance. Indicates ammonium)
The content of the ether carboxylic acid or a salt thereof in the liquid skin cleansing composition is preferably 1 to 20% by mass, more preferably 1 to 15% by mass, from the viewpoint of improving the moist feeling and cleanability after washing. , 1-8% by mass is more preferable.
Further, the content of the higher fatty acid having 10 to 22 carbon atoms or a salt thereof in the liquid skin cleansing composition is preferably 1% by mass or less from the viewpoint of improving the moist feeling after washing and the cleanability against stains. , 0.5% by mass or less, further preferably 0.1% by mass or less, and even more preferably 0% by mass.

Examples of the chelating agent include aminopolyacetic acids such as nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentacetic acid, glycol etherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid, triethylenetetraaminehexacetic acid and diencoric acid. Or organic acids such as these salts, diglycolic acid, oxydisuccinic acid, carboxymethyloxysuccinic acid, citric acid, lactic acid, tartaric acid, oxalic acid, malic acid, oxydisuccinic acid, gluconic acid, carboxymethylsuccinic acid, carboxymethyl tartrate acid or Examples thereof include these salts, aminotri (methylenephosphonic acid), 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetra (methylenephosphonic acid), diethylenetriaminepenta (methylenephosphonic acid), alkali metals or lower amine salts thereof. Be done.

One or more chelating agents can be used, and 0.01 to 1% by mass, and further 0.1 to 0.5% by mass are contained in the liquid skin cleansing composition from the viewpoint of improving foam elasticity. Is preferable.

In the liquid skin cleansing composition of the present invention, water is heated to 60 to 80 ° C., each component is sequentially mixed, and the mixture is stirred to make it uniform. In some cases, additional bases are added to neutralize or adjust the pH, and other components are added. After that, the liquid skin cleansing composition of the present invention can be obtained by cooling to room temperature.

The liquid skin cleansing composition of the present invention can be obtained by preparing a composition in which the compounding ingredients are mixed by a usual method and filling the composition in a former container.

Further, at 30 ° C., the pH is preferably 3 to 12, and more preferably pH 6 to 9. The pH is measured with the liquid cleaning agent composition as a stock solution before washing, that is, before diluting with water.

The former container used in the present invention has a porous membrane, and examples of the porous membrane include sponges and nets. Of these porous membranes, when the cleaning liquid remaining attached to the membrane dries and solidifies and causes clogging, the solidified material can be immediately dissolved and the clogging can be cleared by the flow of bubbles at the next discharge. A thin net is preferable. The net is preferably 50 to 500 mesh, and particularly preferably 200 to 400 mesh because it produces good bubbles. Further, preferable materials for such a mesh include nylon, polyester and the like.
The container preferably has a plurality of such films, and particularly preferably two from the viewpoints of economy, foam stability, appropriate ejection property, and the like.

Further, the former container may be any container as long as it mixes a certain amount of cleaning liquid with a certain amount of air and discharges it in a foam state. A squeeze former used by pressing the body of a soft container described in Japanese Patent Publication No. 52-16567, etc. with a finger; for example, Japanese Patent Publication No. 3-7963, Japanese Patent Publication No. 62-103458. , Japanese Patent Application Laid-Open No. 7-315463, etc., and examples thereof include a pump former used by pressing the head of a piston provided with a pump mechanism described in JP-A-7-315463 with a finger.

The liquid skin cleansing composition of the present invention is suitable as, for example, a face wash, body soap, hand soap and the like, and further, a face wash and hand soap are preferable.

The liquid skin cleansing composition of the present invention picks up the foam discharged from the former container, applies it directly to the skin without diluting it with water, foams and cleans it, and then uses warm water such as a shower. Used by rinsing.
In the present invention, the skin means the skin excluding the scalp, specifically, the skin of the face, hands, feet, and body.

Next, the present invention will be described in more detail with reference to examples. Hereinafter, unless otherwise specified,% means mass%.

Examples 1-18 and Comparative Examples 1-3
The liquid skin cleansing composition having the compositions shown in Tables 1 and 2 was produced by heating water to 60 to 80 ° C., mixing each component in sequence, stirring and dissolving, and cooling to 30 ° C. (The pH adjuster was added after adjusting the pH of the obtained liquid skin cleansing composition to the values shown in the table.) The following evaluations (1) to (4) were made using the obtained cleansing agent. Was done.

(1) Foaming during cleaning Each cleaning agent composition was filled in a pump former container (100 mL [YF-9143] manufactured by Yoshino Kogyo Co., Ltd.). Five specialized panelists wet the forearm with water for each cleaning agent, push it once (1 mL), massage it 10 times by stroking it, and reduce the foam retention (whiteness of foam, thickness of foam) during cleaning. It was evaluated according to the criteria of.
4 points: Good foam retention 3 points: Slightly foamy 2 points: Slightly foamy 1 point: Poor foam retention If the total score obtained is 18 points or more (◎), 12 points or more If it is less than 18 points, it is evaluated as (◯), if it is 7 points or more and less than 12 points, it is evaluated as (Δ), and if it is less than 7 points, it is evaluated as (x).

(2-1) Evaluation of stability at low temperature 1
Each cleaning agent composition was filled in a pump former container (100 mL [YF-9143] manufactured by Yoshino Kogyo Co., Ltd.). Store in a pump former container and a hard transparent glass bottle (25 mL) at 0 ° C. for 1 week, check the appearance and the appearance of bubbles when the pump former is pressed twice, and evaluate according to the following criteria.
⊚: A transparent, dischargeable and firm foam can be obtained.
◯: It is transparent and can be discharged.
Δ: It is transparent, but cannot be discharged.
X: It becomes cloudy and cannot be discharged.

(2-2) Evaluation of stability at low temperature 2
Evaluation 2) When a pump former container is not used Each cleaning agent composition is stored in a hard transparent glass bottle (25 mL) at 0 ° C. for 1 week, the appearance is confirmed, and the evaluation is made according to the following criteria.
◯: It is transparent and the liquid is fluid.
Δ: Transparent, but the liquid has no fluidity.
X: White turbidity or precipitate is confirmed.

(3) Dirt removal (model surface sebum)
Each cleaning agent composition was filled in a pump former container (100 mL [YF-9143] manufactured by Yoshino Kogyo Co., Ltd.). Five specialized panelists spread 30 μg of model surface sebum (* 9) on the forearm in a circle with a diameter of 3 cm, put foam pushed once (1 mL) on it, leave it for 60 seconds, and then run water (tap water, tap water, Rinse at a water temperature of 25 ° C. to 30 ° C. for 5 seconds, and visually evaluate according to the following criteria.
4 points: All fell.
3 points: More than 80% of the dirt was removed.
2 points: More than 50% of the dirt was removed.
1 point: Less than 50% of the dirt was removed.
If the total score obtained is 15 points or more (◎), if it is 10 points or more and less than 15 points (○), if it is 5 points or more and less than 10 points (△), if it is less than 5 points ( Evaluate as ×).

(4) Feeling of moisturized skin Each cleaning agent composition was filled in a pump former container (100 mL [YF-9143] manufactured by Yoshino Kogyo Co., Ltd.). After 5 specialist panelists wet the forearm with water and push (1 mL) once to the palm of each cleaning agent, massage the forearm 10 times, and wash away the bubbles with running water (tap water, water temperature 25 ° C to 30 ° C). , Wipe off the water well with a paper towel (Eliere Pro Wipe Soft Towel White, folded in four (manufactured by Daio Paper Corporation)). After that, it was naturally dried for 5 minutes, and the feeling of the skin after washing was evaluated and scored according to the following criteria.
4 points: Moist feeling 3 points: Slightly moist feeling 2 points: Slightly moist feeling 1 point: Moist feeling If the total score obtained is 15 points or more (◎), 10 points or more If it is less than 15 points, it is evaluated as (◯), if it is 5 points or more and less than 10 points, it is evaluated as (Δ), and if it is less than 5 points, it is evaluated as (x).

* 1 Active ingredient of Amylite ACS-12 manufactured by Ajinomoto Co., Inc. (30% aqueous solution)
* 2 Active ingredient of Ajinomoto CS-22B (25% aqueous solution)
* 3 Active ingredient of Anhitor 20HD manufactured by Kao Corporation (30% aqueous solution)
* 4 Active ingredient of Anhitor 20AB manufactured by Kao Corporation (30% aqueous solution)
* 5 Active ingredient of Emar 125A manufactured by Kao Corporation (25% aqueous solution)
* 6 Active ingredient of Emar 227 manufactured by Kao Corporation (27% aqueous solution)
* 7 ADEKA's ADEKA Carpole DL-30
* 8 Kao Akipo RLM-45 manufactured by Kao Corporation
* 9 Model surface sebum

The following composition was produced by heating to 60 to 80 ° C., mixing and stirring each component to dissolve, and cooling to 30 ° C.

Prescription example 1. (Body Soap)
N-coconut oil fatty acid acyl-L-alanine sodium 4.0 (%)
Amidopropyl betaine laurate 3.0 (%)
Polyoxyethylene (1) Ammonium Lauryl Ether Sulfate 3.0 (%)
Polyoxyethylene (4.5) Lauryl Ether Carboxylic Acid 2.0 (%)
Glycerin 3.0 (%)
Polypropylene glycol 3.0 (%)
Appropriate amount of sodium hydroxide (amount that makes the solution pH 6.0)
Appropriate amount of citric acid (amount that makes the solution pH 6.0)
Cationicized cellulose 0.01 (%)
Fragrance Purified water balance 100 (%) in total

Prescription example 2. (Body Soap)
N-coconut oil fatty acid acyl-L-alanine sodium 5.0 (%)
Lauric acid 0.1 (%)
Lauryl hydroxysulfobetaine 5.0 (%)
Polyoxyethylene (2) Ammonium Lauryl Ether Sulfate 1.0 (%)
Glycerin 3.0 (%)
Dipropylene glycol 8.0 (%)
Diethylene glycol monoethyl ether 3.0 (%)
Appropriate amount of sodium hydroxide (amount that makes the solution pH 6.0)
Appropriate amount of malic acid (amount that makes the solution pH 6.0)
Coconut oil fatty acid monoethanolamide 0.5 (%)
Fragrance 0.3 (%)
Methyl paraoxybenzoate 0.3 (%)
Hyaluronic acid 0.001 (%)
Purified water balance 100 (%) in total

Claims (5)

The following components (A) to (F) are contained, and the content mass ratio (B / D) of the component (B) to the component (D) is 0.1 or more and 1.5 or less, and the content is relative to the component (A). content weight ratio of component (B) is (B / a), Ri der 0.5 to 5, the liquid skin cleansing composition comprising filled into foamer vessel (provided that the following a1 and a2:
a1: General formula (3)

(R ¹¹ and R ¹² indicate an alkyl group or a hydrogen atom having 1 to 4 carbon atoms which may contain a hydroxyl group, which may be the same or different, and R ¹³ indicates a hydrogen atom or a methyl group).
The structural unit represented by,
a2: General formula (4)

(R ¹⁴ indicates a linear or branched alkyl group having 1 to 22 carbon atoms, and R ¹⁵ indicates a hydrogen atom or a methyl group)
The structural unit represented by,
Except when containing a polymer containing 85 to 100% by mass as a constituent unit) .
(A) N-acylamino acid-based anionic surfactant (B) amphoteric surfactant (C) polyoxyethylene alkyl ether sulfate (D) polyhydric alcohol 0.1 to 28% by mass
(E) Water (F) Ethercarboxylic acid represented by the following general formula (2) or a salt thereof R ^2- O- (CH ₂ CH ₂ O) _m- CH _2- COM ² ... (2)
(In the formula, R ² indicates an aliphatic hydrocarbon having 4 to 22 carbon atoms, m indicates an average addition molar number of 0 to 20, and M ² indicates a hydrogen atom, an alkali metal, an alkaline earth metal, an ammonium or an organic substance. Indicates ammonium) 1-20% by mass The liquid skin cleansing composition according to claim 1 , wherein the content of the component (D) is 5 to 28% by mass. The first or second claim, wherein the component (A) contains 60% by mass or more of one or more selected from N-coconut oil fatty acid acyl-L-alanine, N-coconut oil fatty acid acyl-L-glutamic acid and salts thereof. Liquid skin cleansing composition. The liquid skin cleansing composition according to any one of claims 1 to 3, wherein the content mass ratio (B / C) of the component (B) to the component (C) is 0.2 or more and 20 or less. The liquid skin cleansing composition according to any one of claims 1 to 4, wherein the content of the component (D) is 5 to 20% by mass.