JP5356234B2 - Skin cleansing material and skin cleansing method using the same - Google Patents

Abstract

The invention aims at providing an excellent detergent for the skin which can form fine foam and is excellent in the ejection of foam at low temperature when charged into a foamer container and which can suppress dry skin after cleansing and a method for cleansing the skin. The invention relates to a detergent for the skin which contains (A) a betaine amphoteric surfactant, (B) an N-acylmethyltaurine salt and (C) a polyoxyethylene alkylsulfosuccinic acid salt and/or an alkylsulfosuccinic acid salt in such amounts by mass as to satisfy the relationship: (C)/[(A)+(B)]=0.05 to 0.5 and a method for cleansing the skin with the detergent.

Description

  The present invention relates to a skin cleanser and a skin cleansing method using the same. More specifically, the foam quality is fine, and when the foam container is filled, the foam dischargeability at low temperature is good, and further, after washing The present invention relates to a skin cleansing material capable of suppressing the roughness of the skin, and a skin cleaning method using the skin cleansing material.

Conventionally, higher fatty acid salts, polyoxyethylene alkyl ether sulfates, monoalkyl phosphates, and the like are known as main components of skin cleansing materials. Among these, fine feeling of use and foam quality are fine. In view of detergency and the like, many higher fatty acid salts are used.
However, when a higher fatty acid salt is used, problems such as foam quality is not fine enough, crystal precipitation is likely to occur, problems such as poor ejection from the container when filled in the former container, There was a problem such as giving the skin a bulk after washing.

  In order to solve such problems, various techniques have been reported so far, for example, N-acyl amino acid anionic surfactants, other anionic surfactants, amphoteric surfactants and semipolar surfactants. Detergent composition containing at least one compound selected from surfactants and polyhydric alcohol (Patent Document 1); laurate, myristate, and palmitate at a specific mass ratio A detergent composition comprising (Patent Document 2); a detergent composition comprising an anionic surfactant and / or an amphoteric surfactant, water-insoluble particles, and a nonionic surfactant (Patent Document 3); A detergent composition containing a lauric acid basic amino acid salt and a myristic acid basic amino acid salt in a specific mass ratio and containing a higher fatty acid (Patent Document 4); a sulfosuccinic acid alkyl salt and / or sulfo Detergent composition containing succinic acid polyoxyethylene alkyl salt, betaine type amphoteric surfactant, acrylic acid / alkyl methacrylate copolymer, higher fatty acid salt, and powder (Patent Document 5); sulfosuccinic acid type anionic property A detergent composition comprising a surfactant, at least one of an N-acyl acidic amino acid type anionic surfactant and a betaine type amphoteric surfactant, a dispersion of a fatty acid glycol ester, a conditioning component, and water (patent) Reference 6); cleansing composition containing specific acyl lactylate and specific co-surfactant in specific mass ratio (Patent Document 7); anionic surfactant and amphoteric surfactant, oil, and water , Skin cleansing agent containing a specific mass ratio (Patent Document 8); N-acyl carboxylic acid type surfactant, and N-acyl sulfonic acid type At least one of a surfactant, at least one of an amphoteric surfactant, a zwitterionic surfactant, and a semipolar surfactant, an alkyl glycol polyhydric alcohol ether compound, ethanol, glycerin, propylene glycol, and dipropylene A detergent composition containing at least one of glycols in a specific mass ratio (Patent Document 9); acylmethyltaurine salt type anionic surfactant, alkylamide amino acid salt type amphoteric surfactant and alkyliminodicarboxylic acid A detergent composition comprising at least one of a salt-type amphoteric surfactant, at least one of an alkylbetaine-type amphoteric surfactant and an alkylamidobetaine-type amphoteric surfactant, and a water-soluble dihydric alcohol in a specific mass ratio. (Patent Document 10); anionic surfactant, amphoteric interface A detergent composition containing an active agent and a sucrose fatty acid ester in a specific mass ratio (Patent Document 11); and the like have been reported.

  However, even in the technology as described above, the skin cleansing agent that is excellent in all of the fine texture of the foam, the discharge property of the foam at a low temperature when filled in the former container, and the lack of roughness of the skin after washing Therefore, it is excellent skin that the foam quality is fine, the foam dischargeability at low temperature is good when filling the former container, and the skin can be soft after washing A cleaning fee was desired.

JP 2006-183039 A JP-A-2005-154651 JP 2005-187411 A JP-A-1-238521 JP 2006-169453 A JP 2005-289823 A JP-A-6-40850 Japanese Patent Laid-Open No. 7-25726 JP 2005-146016 A JP 2006-206720 A JP 2007-138023 A

  The present invention has been made in view of the above circumstances, the foam quality is fine, the foam dischargeability at low temperatures is good when filled in a former container, and it can suppress the roughness of the skin after washing, excellent It is an object of the present invention to provide a skin cleaning material and a skin cleaning method using the skin cleaning material.

  As a result of intensive studies to achieve the above object, the present inventors have found that (A) a betaine amphoteric surfactant, (B) an N-acylmethyltaurine salt, (C) a polyoxyethylene alkylsulfosuccinate and Combining with at least one of alkyl sulfosuccinates and setting the mass ratio of (C) / [(A) + (B)] to a specific ratio, the foam quality is fine and low when the foam container is filled. The present inventors have found that an excellent skin cleansing agent can be obtained that has good foam ejection properties at the time and can suppress the skin roughness after washing.

Therefore, the present invention
<1> (A) a betaine amphoteric surfactant;
(B) an N-acylmethyl taurate salt;
(C) at least one of polyoxyethylene alkylsulfosuccinate and alkylsulfosuccinate, and the content ratio of each component is (C) / [(A) + (B)] = It is a skin cleansing agent characterized by being 0.05 to 0.5.
<2> The skin cleanser according to <1>, which is filled in a former container.
<3> A skin cleansing method using the skin cleanser according to any one of <1> to <2>.
<4> The skin cleaning method according to <3>, wherein the foamy skin cleanser discharged from the former container is applied to the skin by hand and washed.

  According to the present invention, the foam quality is fine, when the foam container is filled, the foam dischargeability at low temperature is good, and the skin cleansing after washing can be suppressed, and A skin cleaning method using the skin cleaning material can be provided.

(Skin cleansing agent)
The skin cleanser of the present invention comprises (A) a betaine amphoteric surfactant, (B) an N-acylmethyltaurine salt, and (C) at least one of a polyoxyethylene alkylsulfosuccinate and an alkylsulfosuccinate. In addition, it is contained at a specific mass ratio, and further contains other optional components as needed.

<(A) component>
The betaine amphoteric surfactant (component (A)) is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include imidazoline type (amidoamine type), amide amino acid salt, carbobetaine type (alkyl). Betaine, alkylamidobetaine), sulfobetaine type (alkylsulfobetaine, alkylhydroxysulfobetaine) and the like.

Examples of the imidazoline type include stearoylamidoamine, coconut oil alkyl-N-hydroxyethyl imidazolinium betaine, and the like. Examples of the carbobetaine type include, for example, alkylbetaine, lauryldimethylaminoacetic acid betaine, coconut oil alkyldimethylaminoacetic acid betaine, stearyldimethylaminoacetic acid betaine, etc., alkylamide betaine, coconut oil fatty acid amidopropyl betaine, lauric acid amidopropyl Examples include betaine. Examples of the sulfobetaine type include alkylsulfobetaine, coconut oil fatty acid dimethylsulfopropylbetaine, etc., alkylhydroxysulfobetaine, coconut oil fatty acid dimethylaminohydroxysulfobetaine, lauryldimethylaminohydroxysulfobetaine, and the like, and laurylhydroxy Examples include sulfobetaine.
Among these, as the component (A), a betaine amphoteric surfactant having a carbobetaine type and having a monovalent hydrocarbon group having 12 to 18 carbon atoms as its alkyl chain is preferable. Betaine amphoteric surfactants having a monovalent hydrocarbon group are more preferred.
In addition, the said (A) component can be used individually by 1 type or in combination of 2 or more types as appropriate.

  There is no restriction | limiting in particular as content of the said (A) component, Although it can select suitably according to the objective, 2-20 mass% is preferable in the said skin cleansing material, and 5-15 mass% is especially preferable. More preferred. If the content is less than 2% by mass, the fine texture of the foam may be insufficient, and if it exceeds 20% by mass, it is not preferable in terms of suppressing the skin roughness after washing. On the other hand, when the content is within a more preferable range, it is advantageous in that a more excellent skin cleansing agent can be provided in terms of fineness of foam quality and no roughness of the skin after washing.

<(B) component>
The N-acylmethyl taurine salt (component (B)) is not particularly limited and may be appropriately selected depending on the intended purpose. The acyl group is a monovalent hydrocarbon group having 5 to 21 carbon atoms. Those having a monovalent hydrocarbon group having 11 to 15 carbon atoms are more preferable. When the carbon number of the acyl group is within a more preferable range, it is advantageous in that it can provide a more excellent skin cleansing agent for foam dischargeability at low temperatures when filled in a former container.
The salt is preferably an alkali metal salt, alkaline earth metal salt, amine salt, or amino acid salt, and more preferably an alkali metal salt such as sodium or potassium, or a substituted or unsubstituted ammonium salt. Of these, sodium salts are particularly preferred. When the salt is a sodium salt, it is advantageous in that it can provide a more excellent skin cleanser with respect to mildness to the skin.

Specific examples of the component (B) include N-lauroylmethyltaurine salt, N-myristoylmethyltaurine salt, N-palmitoylmethyltaurine salt, N-stearoylmethyltaurine salt, beef tallow fatty acid methyltaurine salt, N-coconut Examples include oil fatty acid methyl taurine salt and N-decanoyl methyl taurine salt. Among these, N-coconut oil fatty acid methyl taurine sodium is particularly preferable.
In addition, the said (B) component can be used individually by 1 type or in combination of 2 or more types as appropriate.

  There is no restriction | limiting in particular as content of the said (B) component, Although it can select suitably according to the objective, 0.5-10 mass% is preferable in the said skin cleansing material especially, 1-5 mass % Is more preferable. If the content is less than 0.5% by mass, the fine texture of the foam may be insufficient. If it exceeds 10% by mass, the foam ejection properties at low temperatures when filled in the former container may be insufficient. This is not preferable. On the other hand, when the content is in a more preferable range, it is possible to provide a more excellent skin cleanser in terms of fineness of foam quality and foam dischargeability at low temperatures when filled in a former container. It is advantageous.

<(C) component>
The polyoxyethylene (hereinafter sometimes abbreviated as POE) alkylsulfosuccinate and / or alkylsulfosuccinate (component (C)) is not particularly limited and is appropriately selected depending on the intended purpose. However, as the alkyl chain, those having a monovalent hydrocarbon group having 12 to 22 carbon atoms are preferable, and those having a monovalent hydrocarbon group having 12 to 14 carbon atoms are more preferable. If the number of carbon atoms in the alkyl chain is less than 12, it is not preferable in terms of skin irritation, and if it exceeds 22, it is not preferable in terms of foam dischargeability at low temperatures when filled in a former container. On the other hand, when the carbon number of the alkyl chain is within a more preferable range, it is possible to provide a more excellent skin cleanser in terms of mildness to the skin and foam dischargeability at low temperatures when filled in a former container. This is advantageous.
The salt is preferably an alkali metal salt, alkaline earth metal salt, amine salt, or amino acid salt, and more preferably an alkali metal salt such as sodium or potassium, or a substituted or unsubstituted ammonium salt. Of these, sodium salts are particularly preferred. When the salt is a sodium salt, it is advantageous in that it can provide a more excellent skin cleanser with respect to mildness to the skin.
The number of moles of ethylene added to the polyoxyethylene alkylsulfosuccinate is preferably 1 to 10, and more preferably 2 to 5. When the number of moles of ethylene added is less than 1, it is not preferable from the viewpoint of foam discharge at low temperatures when filled in a former container, and when it exceeds 10, it is not preferable from the viewpoint of fineness of foam quality. On the other hand, when the number of moles of ethylene added is in a more preferable range, a superior skin cleanser is provided in terms of foam dischargeability at low temperatures and fineness of foam quality when filled in a former container. This is advantageous.
In addition, as said (C) component, a polyoxyethylene alkyl sulfosuccinate is preferable especially.

Specific examples of the component (C) include POE (1) alkyl (12-14) sulfosuccinate, POE (2) alkyl (12-14) sulfosuccinate, POE (3) dialkyl (12-14). ) Sulfosuccinate, POE (5) Dialkyl (12-14) Sulfosuccinate, POE (7) Dialkyl (12-14) Sulfosuccinate, POE (9) Dialkyl (12-14) Sulfosuccinate, POE (2 ) Alkyl (12-15) sulfosuccinate, sulfosuccinic acid POE (2) monooleylamide salt, POE (4) coconut oil fatty acid isopropanolamide sulfosuccinate, sulfosuccinic acid POE (5) lauroylethanolamide salt, undecylenoylamide Ethylsulfosuccinate, diethylhexyl sulfosuccinate, sulfosuccinate Lauryl salts, include sulfosuccinate laureth salts and, among these, POE (2) alkyl (12 to 14) disodium sulfosuccinate are preferred.
In addition, the said (C) component can be used individually by 1 type or in combination of 2 or more types as appropriate.

  There is no restriction | limiting in particular as content of the said (C) component, Although it can select suitably according to the objective, 1-7 mass% is preferable in the said skin cleansing material, Especially, 1.5-6 mass % Is more preferable. When the content is less than 1% by mass, it is not preferable from the viewpoint of foam dischargeability at a low temperature when filling the former container, and when it exceeds 7% by mass, it is not preferable from the viewpoint of suppressing the skin roughness after washing. . On the other hand, if the content is within a more preferable range, a superior skin cleanser is provided in terms of foam dischargeability at low temperatures when the former container is filled, and lack of skin roughness after washing. This is advantageous.

<Content ratio>
The content ratio of the components (A) to (C) is (C) / [(A) + (B)] = 0.05 to 0.5 in terms of mass ratio, and 0.1 to 0. .4 is preferable, and 0.15-0.4 is more preferable. If the mass ratio is less than 0.05, it is insufficient in terms of foam dischargeability at a low temperature when filling the former container, and if it exceeds 0.5, it suppresses the roughness of the skin after washing. It is insufficient. On the other hand, when the mass ratio is within a more preferable range, a superior skin cleanser is provided in terms of foam dischargeability at a low temperature when the former container is filled, and no skin roughness after washing. This is advantageous.

<Optional component>
In addition to the components (A) to (C), an optional component can be blended with the skin cleansing material of the present invention as long as the effects of the present invention are not impaired. As said arbitrary component, it can select suitably from what is normally used for skin cleansing materials, For example, polyoxyethylene alkyl ether sulfate etc. except the said (B) and (C) components, etc. Nonionic surfactants such as anionic surfactants, amine oxides, polyoxyethylene alkyl ethers, amphoteric surfactants excluding the component (A), oils, silicones, alcohols such as lower or higher alcohols, lanolin derivatives , Protein derivatives, acrylic resin dispersions, cationic polymers, anionic polymers, nonionic polymers, drugs such as vitamins, bactericides, preservatives, pH adjusters, antioxidants, sequestering agents, UV absorbers , Animal and plant extracts or derivatives thereof, pigments, fragrances, pigments, inorganic powders, water-insoluble polymer powders such as clay minerals, nylon, polyethylene, B propylene glycol, ethanol, glycerin, and water.

<Manufacturing>
There is no restriction | limiting in particular as a manufacturing method of the skin cleaning material of this invention, According to the objective, it can select suitably, For example, the said (A)-(C) component, arbitrary components, and water (skin cleaning material) The rest of the mixture is mixed so that the total amount becomes 100 mass%. Moreover, there is no restriction | limiting in particular as an apparatus which prepares the said skin cleansing material, According to the objective, it can select suitably, It was equipped with the several stirring blade (propeller, turbine, disper, etc.) which can mix with a shear force and the whole. A stirrer is preferred. The components (A) to (C) and optional components may be used alone in preparing a skin cleansing agent, or used in the form of a mixture containing two or more components. May be.

<Container>
The skin cleansing material of the present invention is suitable as a skin cleansing material for filling a former container in which the skin cleansing material is discharged in the form of foam because precipitation at a low temperature is suppressed. Accordingly, the container for filling the skin cleansing material of the present invention is not particularly limited, but a former container is preferable, and the skin cleansing product is a skin cleansing product obtained by filling the former with the skin cleansing product or It is also suitable as a liquid detergent product comprising a former container and a skin cleanser filled in the former container.

  Examples of the former container include a non-gas type foam discharge container. The non-gas type foam discharge container is not particularly limited as long as the skin cleanser can be mixed with air and discharged in a foamed state. For example, a squeeze that can discharge bubbles by squeezing the bottle body by hand. Examples of the former container include a pump former container that can discharge bubbles by depressing the nozzle part, and the like. As such a former container, for example, a container manufactured by Yamato Seikan Co., Ltd., Yoshino Kogyo Co., Ltd., or the like can be used.

  The non-gas type foam discharge container usually has a porous film body for forming bubbles (the material is preferably a plastic material such as nylon, polyester, polyolefin, etc.), and the skin cleansing material is the porous film body. By passing through, bubbles are formed. There is no restriction | limiting in particular as a mesh of this porous membrane body, According to the objective, it can select suitably, For example, 100 mesh or more is preferable, 100-400 mesh is more preferable, 200-350 mesh is especially preferable. Moreover, there is no restriction | limiting in particular as the number of the said porous membrane body, According to the objective, it can select suitably, From a viewpoint of improving foam performance, 2 sheets-4 sheets are preferable.

  More specifically, the former container described in JP-A-7-315463, JP-A-8-230961, and JP-A-2005-193972 is preferably used as the former container. Can do.

<Properties>
The properties of the skin cleanser of the present invention are preferably liquid at room temperature.
The viscosity of the skin cleansing material is more specifically, for example, when using a former container, for example, a pump former container capable of discharging bubbles by pushing down the nozzle part, and two sheets of 200 mesh and 305 mesh. When using, under the temperature conditions to be used, 15 mPa * s or less is preferable and 1-10 mPa * s is more preferable. The viscosity is a value measured with a BL type viscometer (rotor No. 1, 60 rpm, 1 minute later / manufactured by Tokyo Keiki Co., Ltd.).
Further, when the skin cleansing material is used in a bathroom or the like, water vapor or water may be mixed into the pump portion. When the skin cleaning material remains in the pump part, the skin cleaning material may be diluted. Therefore, the pH (25 ° C.) of the skin cleaning material is preferably 4 to 6 from the viewpoint of antiseptic power. .
Further, the above-mentioned skin cleansing material is hand-washed as described later (in the present specification, “hand-washing wash” refers to washing the skin by manually applying a foamy skin cleansing material to the skin. When it is applied, the foam discharged from the former container does not disappear immediately (good foam retention), and it is necessary to be easily applied on the skin. Therefore, in this case, the viscosity (foam viscosity) of the foamy skin cleanser is preferably about 2500 to 3100 mPa · s. When the foam viscosity exceeds 3100 mPa · s, it is not preferable in that the foam quality becomes slightly rough. On the other hand, when the foam viscosity is within the preferred range, it is advantageous in that the persistence of foam is good and a skin cleanser suitable for hand washing can be provided. The foam viscosity was measured using a B-type viscometer (NO2, rotation speed 60 rpm, 30 seconds later / manufactured by Tokyo Keiki Co., Ltd.) at 25 ° C. according to the viscosity measurement method of the Japanese Pharmacopoeia General Test Method. Value.

<Application>
The use of the skin cleanser of the present invention is not particularly limited, and can be applied to body soaps, hand soaps, facial cleansers, and the like. Among them, the skin cleansing agent of the present invention has fine foam quality, excellent skin roughness after washing, and is mild to sensitive skin, so it can be used for infants, young women, elderly people and sensitive skin. It is suitable as a human skin cleansing agent.

(Skin washing method)
The skin cleaning method of the present invention is characterized by using the above-described skin cleaning material of the present invention.
The skin cleaning method is not particularly limited and can be appropriately selected depending on the purpose. For example, the liquid skin cleaning material is taken up in a cleaning tool such as a sponge or nylon towel, and foamed on the cleaning tool. Thereafter, a method for washing the skin, a method for discharging the skin cleansing agent filled in the former container in the form of foam, and applying and washing the discharged foam on the skin by hand or using a cleaning tool Etc. Among these, the latter is preferable as the skin cleaning method, and among them, the method of applying and cleaning the discharged foam on the skin by hand (hand-washing cleaning) is particularly preferable.
Moreover, in the said skin cleaning method, there is no restriction | limiting in particular as a site | part of the skin used as washing | cleaning object, The whole body containing a face, a limb, etc. can be made into washing | cleaning object.

In conventional skin cleaning methods, generally, about 3 g of liquid cleaning material is taken on a sponge or nylon towel and the whole body is cleaned. However, foaming is not easy in terms of usability, or cleaning tools are used continuously. In order to give excessive friction to the skin, there was a problem that the skin became thick after washing and the transdermal moisture transpiration increased.
However, in the skin cleaning method of the present invention, the skin cleansing agent is preferably filled in a pump-former type container and discharged in the form of foam, which is convenient in terms of usability. In addition, since the foam quality at the time of discharge is fine and the sustainability of the foam is good, for example, by directly taking about 1 g (about 1 g / 1 discharge) of the discharged foam in the hand and applying it to the skin, it is less The whole body can be washed by the number of discharges. Further, in the case of such hand-washing, since no cleaning tool is used, it is possible to clean the skin more gently by suppressing the increase in the skin roughness and transdermal moisture transpiration after washing.
Further, even when the foam for discharging the skin cleansing material is applied to a cleaning tool (for example, sponge, nylon towel, etc.) that easily gives friction to the skin, the foam quality at the time of discharging the skin cleansing material is used. Because it is fine and has good foam persistence, compared to washing with a liquid cleaning agent, it suppresses the increase in skin roughness and transdermal moisture transpiration after washing, and mildly cleans the skin. can do.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example. In the following examples, unless otherwise specified, “%” in the composition indicates mass%, the ratio indicates the mass ratio, and the amount of each component in the table is an amount converted into a pure component.

[Examples 1 to 5, 8, 9, 11, 13, 14, Reference Examples 6, 7, 10, 12, 15 to 17, and Comparative Examples 1 to 6]
A skin cleanser having the composition shown in Tables 1 to 4 was prepared according to a conventional method, and the obtained liquid skin cleanser was measured with an initial value of pH 5 (pH meter: HM-30G / manufactured by Toa Denpa Kogyo Co., Ltd.). ), 400 mL of a 500 mL capacity pump container having a dispenser was filled. In addition, 400 mL of the liquid skin cleanser was filled in a 500 mL capacity pump former container (one 200 mesh and one 305 mesh used) to obtain a non-aerosol type foamy skin cleanser. In addition, as each component in Tables 1 to 4, products shown in Table 8 to be described later were used.
The following evaluation was performed about the obtained skin washing material. The results are also shown in Tables 1-4.

-Foam dischargeability at low temperatures when filled in former containers-
After storing the non-aerosol-type foam skin cleanser at 5 ° C for 1 week, the operation of discharging from the pump former container at 5 ° C was repeated 300 times. evaluated. Evaluation was performed on five samples, and the results were shown as average values.
<Evaluation criteria>
5: Rough foam is not mixed, and fine foam can be discharged.
4: Partially coarse bubbles are mixed, but fine bubbles can be discharged, and there is no problem in quality.
3: Although coarse bubbles are mixed as a whole, fine bubbles can be discharged and there is no problem in quality.
2: As a whole, coarse bubbles are mixed, and fine bubbles cannot be discharged, resulting in quality problems.
1: Bubbles are not formed, fine bubbles cannot be discharged, and there is a problem in quality.

-Fine texture of foam-
About 3 g of a liquid skin cleanser was taken on a nylon towel wet with tap water at 40 ° C., and the fineness of the foam quality when the arm was washed was evaluated. The evaluation was performed by 30 professional panelists with high evaluation accuracy, scored based on the following criteria, and the results were shown as average values.
<Evaluation criteria>
A: More than 25 people felt that the fine texture of the foam was good.
○: 20 to 24 people felt that the fineness of the foam was good.
(Triangle | delta): 15-19 felt that the fine texture of a bubble was good.
X: 14 or less felt that the fineness of foam was good.

-Increased transdermal moisture transpiration-
Generally, it is known that the amount of transdermal moisture transpiration increases when the skin protecting component is excessively removed by the skin cleansing agent. When the barrier function of the skin is reduced and the transdermal moisture transpiration rate is increased, a feeling of irritation such as tingling or irritability after washing may be felt. Therefore, after about 3g of liquid skin cleansing material, 4 male panelists in their 30s cleaned the inner part of the upper arm by hand for 1 minute and acclimated for 30 minutes in an environment of temperature 20 ° C and humidity 40%. The transdermal moisture transpiration rate was measured five times for each arm with a transdermal moisture transpiration measuring device (AS-TW2 ASAHI BIOMED). Based on the following formula, the percutaneous moisture transpiration from the average value of 4 persons was calculated based on the following formula, with the average value of 5 times, and the percutaneous moisture transpiration amount before washing as 100. The increase in quantity (decreased skin barrier function) was evaluated. A result is shown based on the following evaluation criteria. In addition, it can be said that the skin washing | cleaning raw material with a low increase rate of transdermal moisture transpiration | evaporation amount compared with before washing | cleaning is a mild washing | cleaning fee with respect to skin.
<Formula>
Rate of increase (%) = [moisture transpiration after washing (average value for 5 times) −water transpiration before washing (average value for 5 times)] / water transpiration before washing (average value for 5 times) × 100
<Evaluation criteria>
5: Increase rate is 0% or less 4: Increase rate is 1-20%
3: Increase rate is 21-40%
2: Increase rate is 41-60%
1: Increase rate is 61% or more

-No skin roughness after washing-
About 3 g of a liquid skin cleanser was taken on a nylon towel wetted with 40 ° C. tap water, and the suppression of the skin roughness after the arm was washed was evaluated. The evaluation was performed by 10 expert panelists with high evaluation accuracy, scored based on the following criteria, and the results were shown as average values.
<Evaluation criteria>
◎: More than 8 out of 10 people answered that the haze was suppressed ○: 6-7 out of 10 people answered that the haze was suppressed Δ: 4-5 out of 10 people were hungry Answered that it was suppressed ×: 3 or less of 10 respondents said that the haze was suppressed

From the results of Tables 1 to 4, the skin cleanser of the present invention containing all the components (A) to (C) and having a mass ratio of (C) / [(A) + (B)] within a certain range. (Examples 1 to 5, 8, 9, 11, 13, 14, Reference Examples 6, 7, 10, 12, 15 to 17 ) have a fine foam quality. It was found that this is an excellent skin cleanser that has good discharge properties and can suppress the skin roughness after washing. On the other hand, it does not contain any of the components (A) to (C), or the skin cleansing material in which the mass ratio of (C) / [(A) + (B)] does not satisfy a certain range (Comparative Examples 1 to 6) was inferior in at least any of the following points: fineness of foam quality, foam dischargeability at low temperature when filled in a former container, and lack of skin roughness after washing.

[Example 18: Anti-inflammatory agent-containing liquid cleaning agent]
An anti-inflammatory agent-containing liquid cleaning material having the following composition was prepared by a conventional method.
mass%
Amidopropyl betaine laurate 10.00
Palm oil alkyl-N-hydroxyethylimidazolinium betaine 0.50
N-coconut oil fatty acid methyl taurine sodium 2.50
POE (2) alkyl (12-14) disodium sulfosuccinate 2.00
Sulfosuccinic acid POE (5) Lauroylethanolamide disodium (Sanyo Chemical Industries, Ltd.) 0.50
Propylene glycol 13.00
Concentrated glycerin 5.00
1,3-butylene glycol 2.00
Cationized cellulose (Lion Corporation) 0.05
Dipotassium glycyrrhizinate 0.10
Fragrance 0.50
Blue No. 1 0.00015
Yellow No. 4 0.0001
Adjusted amount to citric acid pH 5.0
Purified water remaining
Total 100.00
Ratio of (C) / [(A) + (B)] = 0.19

[Example 19: Deodorant and foam cleaning agent for sterilization]
A deodorant having the following composition and a foaming detergent for sterilization were prepared by a conventional method.
mass%
Amidopropyl betaine laurate 9.00
Coconut oil fatty acid amidopropyl betaine 1.00
Lauryldimethylaminoacetic acid betaine 0.50
N-coconut oil fatty acid methyl taurine sodium 2.50
POE (2) alkyl (12-14) disodium sulfosuccinate 2.50
Propylene glycol 13.00
Dipropylene glycol 0.50
Concentrated glycerin 5.00
1,3-butylene glycol 2.00
Dimethyldiallylammonium chloride / acrylamide copolymer solution (Nalco Japan Co., Ltd.) 0.50
Ethanol 3.00
Isopropyl methylphenol 0.10
Piroctone Olamine 0.10
L-Menthol 0.30
Fragrance 0.50
Blue No. 1 0.0001
Yellow No. 4 0.0001
Adjusted amount to citric acid pH 5.0
Purified water remaining
Total 100.00
Ratio of (C) / [(A) + (B)] = 0.19

[Example 20: Mild liquid cleaning fee for baby]
A mild liquid cleaning agent for babies having the composition shown below was prepared by a conventional method.
mass%
Lauric acid amidopropyl betaine 5.00
Lauryldimethylaminoacetic acid betaine 0.50
Palm oil fatty acid dimethylaminohydroxysulfobetaine 0.50
N-coconut oil fatty acid methyl taurine sodium 0.50
Sulfosuccinic acid POE (5) disodium lauroylethanolamide 1.50
Propylene glycol 10.00
Concentrated glycerin 4.50
1,3-butylene glycol 2.00
Dipropylene glycol 0.50
Rosemary extract 1.00
Jojoba oil 0.50
Cationized cellulose (Lion Corporation) 0.05
Dipotassium glycyrrhizinate 0.10
Fragrance 0.50
Blue No. 1 0.00015
Yellow No. 4 0.0001
Adjusted amount to citric acid pH 5.0
Purified water remaining
Total 100.00
Ratio of (C) / [(A) + (B)] = 0.23

  Each of the skin cleansing materials of Examples 18 to 20 was evaluated in the same manner as described above. The results are shown in Table 5. The skin cleansing materials of Examples 18 to 20 have excellent foam cleanliness, have excellent foam dischargeability at low temperatures when filled in a former container, and can suppress the roughness after cleaning. It was a fee.

[Example 21: Evaluation of cleaning method]
In order to find a cleaning method suitable for the skin cleansing material of the present invention, the following evaluation was performed.
-Difference in increase of transdermal moisture transpiration by cleaning method-
The skin cleanser of Example 1 is filled in a pump former container (one 200 mesh and one 305 mesh), and about 1 g of the discharged foam is taken by hand or a nylon towel wet with 40 ° C. tap water, Four 30-year-old male panelists washed the inner part of the upper arm for 1 minute once a day for 5 days. After washing on the 5th day, after acclimatization for 30 minutes in an environment of a temperature of 20 ° C. and a humidity of 40%, 5 times for each arm with a transdermal moisture transpiration measuring device (AS-TW2 ASAHI BIOMED). The transdermal moisture transpiration was measured. Based on the following formula, the percutaneous moisture transpiration from the average value of 4 persons was calculated based on the following formula, with the average value of 5 times, and the percutaneous moisture transpiration amount before washing as 100. The increase in quantity (decreased skin barrier function) was evaluated. Table 6 shows the results based on the following evaluation criteria. In addition, it can be said that the washing | cleaning method with a low increase rate of transdermal moisture transpiration | evaporation amount compared with before washing | cleaning is a mild washing method with respect to skin.
<Formula>
Rate of increase (%) = [moisture transpiration after washing (average value for 5 times) −water transpiration before washing (average value for 5 times)] / water transpiration before washing (average value for 5 times) × 100
<Evaluation criteria>
5: Increase rate is 0% or less 4: Increase rate is 1-20%
3: Increase rate is 21-40%
2: Increase rate is 41-60%
1: Increase rate is 61% or more

−Difference in roughness due to cleaning method−
The skin cleanser of Example 1 is filled in a pump former container (one 200 mesh and one 305 mesh), and about 1 g of the discharged foam is taken by hand or a nylon towel wet with 40 ° C. tap water, Washing the inner side of the upper arm for 1 minute was performed once a day for 5 days. The inhibitory effect on the skin roughness after the 5th day of washing was evaluated. The evaluation was performed by 10 professional panelists with high evaluation accuracy, and was scored based on the following criteria. The average value is shown in Table 6 as a result.
<Evaluation criteria>
◎: More than 8 out of 10 people answered that the haze was suppressed ○: 6-7 out of 10 people answered that the haze was suppressed Δ: 4-5 out of 10 people were hungry Answered that it was suppressed ×: 3 or less of 10 respondents said that the haze was suppressed

  From the results shown in Table 6, the skin cleansing material of the present invention can suppress the increase in the amount of transdermal moisture transpiration and the dryness of the skin after washing regardless of the washing method of hand washing or nylon towel washing. Although good results were obtained, the effect was particularly remarkable in hand washing. From this, it can be seen that the skin cleanser of the present invention is a skin cleanser particularly suitable for hand washing.

[Example 22: Evaluation of foam viscosity and good persistence of foam]
When the skin cleansing material is applied to hand washing as described above, it is necessary that the foam discharged from the former container does not disappear immediately (has good foam retention) and is easy to apply on the skin. Therefore, the foam viscosity of the skin cleansing material of the present invention and the good persistence of the foam were evaluated as follows.

-Foam viscosity-
The foam foam discharged after filling the skin former of each of the Examples and Comparative Examples shown in Table 7 and the commercially available skin detergent into a pump former container (one 200 mesh and one 305 mesh). The viscosity was measured at 25 ° C. using a B-type viscometer (NO 2, rotation speed: 60 rpm, after 30 seconds / manufactured by Tokyo Keiki Co., Ltd.) according to the viscosity measurement method of the Japanese Pharmacopoeia General Test Method. The results are shown in Table 7. In addition, it can be evaluated that the above-mentioned foam viscosity is preferably about 2500 to 3100 mPa · s from the viewpoint of fine texture of foam and good durability of foam.

-Good persistence of foam-
The skin cleanser of each of the Examples and Comparative Examples shown in Table 7 and a commercially available skin cleanser are filled in a pump foamer container (one 200 mesh and one 305 mesh), and about 5 g of discharged foam is added. The sample was taken in an SV100 vial, filled uniformly, and the durability of foam retention was evaluated. The foam height after the initial discharge foam filling and the foam height after 30 minutes were measured. About the average value of 5 times, the persistence (%) 30 minutes after discharge bubble filling when the bubble height immediately after discharge bubble filling was set to 100 was calculated based on the following formula, and the bubble sustainability was evaluated. Table 7 shows the results based on the following evaluation criteria. In addition, it can be said that it is a washing | cleaning material with high persistence of a foam, as the skin washing | cleaning material whose persistence rate is higher compared with immediately after filling (evaluation reference value is high).
<Formula>
Sustain rate (%) = [foam height after 30 minutes of filling foam / foam height immediately after filling foam] × 100
<Evaluation criteria>
5: Sustain rate is 90% or more 4: Sustain rate is 71-89%
3: Sustain rate is 51-70%
2: Sustain rate is 31-50%
1: Sustain rate is 30% or less

  From the results of Table 7, it was found that the skin cleanser of the present invention was superior in foam viscosity and foam persistence compared to the skin cleanser of the comparative example and a commercially available skin cleanser. . Therefore, the skin cleansing material of the present invention does not immediately lose foam discharged from the former container (good foam retention) and is easy to apply on the skin, that is, skin cleansing suitable for hand washing. It turns out that it is a charge.

  In addition, the acquisition source of each component used in each said Example is as follows.

The skin cleanser of the present invention can be widely applied to, for example, body soaps, hand soaps, facial cleansers, etc. Among them, the skin cleanser has a fine foam quality and is excellent in the lack of roughness of the skin after cleaning. Since it is mild to sensitive skin, it is suitable as a skin cleansing agent for infants, young women, elderly people and people with sensitive skin.
The skin cleaning method using the skin cleaning material is not particularly limited, but from the viewpoint of cleaning the skin more gently, foam discharged from the former container without using a cleaning tool such as a sponge or nylon towel is used. A hand-washing method in which a skin-like skin cleansing material is taken in the hand and the skin is washed with the foam can be preferably employed.

Claims (5)

(A) a betaine amphoteric surfactant;
(B) an N-acylmethyl taurate salt;
(C) at least one of polyoxyethylene alkylsulfosuccinate and alkylsulfosuccinate, and the content ratio of each component is (C) / [(A) + (B)] = 0.15 to 0.4 der is,
The (B) N-acylmethyl taurine salt is at least one selected from N-coconut oil fatty acid methyl taurine salt, N-lauroyl methyl taurine salt, and N-myristoyl methyl taurine salt,
At least one of the (C) polyoxyethylene alkylsulfosuccinate and alkylsulfosuccinate has a monovalent hydrocarbon group having 12 to 14 carbon atoms as an alkyl chain, and is filled in a former container. Characteristic skin cleanser. (A) Content of a component is 5-15 mass%,
(B) Content of a component is 0.5-10 mass%,
The skin cleanser according to claim 1, wherein the content of component (C) is 1.5 to 6% by mass. The skin cleansing material according to any one of claims 1 to 2, which is for sensitive skin. A skin cleansing method using the skin cleanser according to any one of claims 1 to 3. The skin cleaning method according to claim 4, wherein the foamy skin cleansing agent discharged from the former container is applied to the skin by hand and cleaned.