TWI448550B - Skin cleaning material and method for skin cleaning use the same - Google Patents

Description

Skin cleansing material and skin cleaning method using the same

The present invention relates to a skin cleansing material and a skin cleansing method using the skin cleansing material, and more particularly to a fine foam, and a foam sprayability at a low temperature when filled into a foaming container, and further A skin cleansing material capable of suppressing dry skin after washing, and a skin cleansing method using the above skin cleansing material.

Since the prior art, the main cleaning ingredients of skin cleansing materials are known as high-grade fatty acid salts, polyoxyethylene alkyl ether sulfates, monoalkyl phosphates, etc., and the use of the feel or the fineness of the foam, the cleaning power, etc. In view of these, higher fatty acid salts are often used in these.

However, when a higher fatty acid salt is used, there are the following problems: the fineness of the foam is likely to be insufficient; or the crystallization is liable to occur, so that the discharge property from the container when the filling into the foaming container is deteriorated; Problems such as drying the skin after cleansing.

In order to solve such problems, various technical reports have been reported from the prior art, for example, containing an N-mercapto-amino acid anionic surfactant, an anionic surfactant other than the same, selected from an amphoteric surfactant, and a semi-polar At least one compound of a surfactant, and a detergent composition of a polyol (Japanese Patent Laid-Open Publication No. Hei. No. 2006-183039); a washing containing laurate, myristic acid, and palmitate in a specific weight ratio Detergent composition (Japanese Patent Laid-Open Publication No. 2005-154651); containing anionic surfactant and/or amphoteric surfactant, water-insoluble particles, and non-ion a detergent composition of a surfactant (Japanese Patent Laid-Open Publication No. 2005-187411); containing a uric acid basic amino acid salt and a myristic acid basic amino acid salt in a specific weight ratio, and contains a high-grade A detergent composition of a fatty acid (Japanese Patent Laid-Open No. Hei 1-385521); an alkyl sulfosuccinate salt and/or a polyoxyethylene alkyl sulfosuccinate salt, a betaine type amphoteric surfactant Acrylic-alkyl methacrylate copolymer, higher fatty acid salt, and powder detergent composition (Japanese Patent Laid-Open No. 2006-169453); containing sulfosuccinic acid type anionic surfactant, N At least one of a mercapto acid amino acid type anionic surfactant and a betaine type amphoteric surfactant, a dispersion of an ethylene glycol fatty acid ester, a regulating component, and a detergent composition of water (Japan Patent Publication No. 2005-289823; a cleaning composition containing a specific bismuth lactate and a specific auxiliary surfactant in a specific weight ratio (Japanese Patent Laid-Open Publication No. Hei 6-40850); Anionic surfactant and amphoteric surfactant, oil, and water skin cleansing material (Japanese Patent Laid-Open No. Hei 7-25726); N-mercaptocarboxylic acid type surfactant and N- in a specific weight ratio At least one of a mercaptosulfonic acid type surfactant, at least one of an amphoteric surfactant, an amphoteric surfactant, and a semipolar surfactant, an alkanediol polyol ether compound, and ethanol, glycerin, propylene glycol, And a detergent composition of at least one of dipropylene glycol (Japanese Patent Laid-Open Publication No. 2005-146016); containing a mercaptomethyltaurate type anionic surfactant, a alkylguanamine in a specific weight ratio At least one of an acid salt type amphoteric surfactant and an alkylimidodicarboxylate type amphoteric surfactant, an alkylene betaine type amphoteric surfactant At least one of a liquid and a decylamine betaine type amphoteric surfactant, and a detergent composition of a water-soluble glycol (Japanese Patent Laid-Open Publication No. 2006-206720); an anionic interface is contained in a specific weight ratio An active agent, an amphoteric surfactant, and a detergent composition of a sucrose fatty acid ester (Japanese Patent Laid-Open Publication No. 2007-138023).

However, in the above-described technique, skin cleansing which is excellent in the fineness of the foam, the foam discharge property at a low temperature when filled in a foaming container, and the fact that the skin is not dried after washing is not found. Because of the material, the industry is expected to have excellent foam quality, excellent foam discharge property at low temperatures when filled in a foaming container, and excellent skin cleansing material capable of suppressing dry skin after washing.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an excellent skin cleansing product which is excellent in foam quality, has good foam discharge property at a low temperature when filled in a foaming container, and can suppress dry skin after washing. Materials, as well as skin cleansing methods utilizing the above-described skin cleansing materials.

The inventors of the present invention conducted intensive studies to achieve the above object, and found that (A) a betaine-based amphoteric surfactant, (B) N-mercaptomethyltaurate, and (C) polyoxygen At least one of an alkyl sulfosuccinate salt and an alkyl sulfosuccinate is combined, and a weight ratio of (C) / [(A) + (B)] is made to a specific ratio, and a foam can be obtained. The present invention has been completed in that it is excellent in foam discharge property at a low temperature when filled in a foaming container, and further excellent skin cleansing material which can suppress dry skin after washing.

Accordingly, the present invention relates to the following: <1> A skin cleansing material comprising: (A) a betaine amphoteric surfactant, (B) N-mercaptomethyltaurate, and ( C) at least one of a polyoxyethylene sulfosuccinate alkyl ester salt and an alkyl sulfosuccinate salt, and the content ratio of each of the above components is (C) / [(A) + (B) by weight ratio )]=0.05~0.5.

<2> The skin cleansing material according to the above <1>, which is filled in a foaming container.

<3> A skin cleansing method according to any one of the above <1> to <2>.

<4> The skin cleansing method according to the above <3>, which is to apply a foamy skin cleansing material sprayed from a foaming container to the skin by hand to perform washing.

According to the present invention, it is possible to provide an excellent skin cleansing material which is excellent in foam quality, has good foam discharge property at a low temperature when filled in a foaming container, and can suppress dry skin after washing, and utilizes the above-mentioned skin cleansing Skin cleansing method for materials.

(skin cleaning material)

The skin cleansing material of the present invention contains (A) a betaine amphoteric surfactant, (B) N-mercaptomethyl taurate, and (C) polyoxyethylene sulfosuccinate in a specific weight ratio. Base salt and alkyl sulfosuccinate At least one of them, and optionally contains other optional components as needed.

<(A) component>

The betaine-based amphoteric surfactant (component (A)) is not particularly limited and may be appropriately selected depending on the intended purpose, and examples thereof include an imidazoline type (ammonium amine type), a guanamine amino acid salt, and a carbonated beet. Carbobetaine type (alkylbetaine, alkylguanamine betaine), sulfobetaine type (alkylsulfobetaine, alkylhydroxysulfobetaine), and the like.

Examples of the imidazoline type include stearylamine amine, coconut oil alkyl-N-hydroxyethyl imidazolinium betaine, and the like. Examples of the above-mentioned carbonate betained type include an alkylbetaine, and examples thereof include lauryldimethylammonium acetate betaine, coconut oil alkyldimethylaminoacetate betaine, stearyldimethylamine acetate betaine, and the like. The alkyl decylamine betaine may, for example, be a coconut oil fat amidinopropyl betaine or a lauryl propyl betaine. Examples of the sulfobetaine type include alkyl sulfobetaine, coconut oil fatty acid dimethyl sulfopropyl betaine, and the like, and alkyl hydroxy sulfobetaine, which is exemplified by coconut oil fatty acid dimethylamine. Hydroxysultaine, lauryl dimethylamino hydroxy sulfobetaine, etc., and examples thereof include lauryl hydroxy sulfobetaine and the like.

Among these, as the component (A), a betaine-based amphoteric surfactant having a carbonated betaine type and having a monovalent hydrocarbon group having a carbon number of 12 to 18 as its alkyl chain is preferred, and among them, it is more preferred A betaine-based amphoteric surfactant having a monovalent hydrocarbon group having a carbon number of 12 to 16.

In addition, the above-mentioned (A) component may be used alone or in combination of two or more.

The content of the component (A) is not particularly limited. Suitably, it is preferred to comprise from 2 wt% to 20 wt%, more preferably from 5 wt% to 15 wt%, of the above skin cleansing material. When the content is less than 2% by weight, the fineness of the foam may be insufficient. When the content exceeds 20% by weight, the skin drying after washing is not preferable. On the other hand, if the above content is in a better range, it is advantageous to provide a fine foaming property and a skin cleansing material which can provide a skin which is less dry and more excellent after washing.

<(B) component>

The N-methylidene methyl taurate (component (B)) is not particularly limited, and may be appropriately selected depending on the purpose. As the thiol group, a monovalent hydrocarbon group having a carbon number of 5 to 21 is preferred. Among them, a mercapto group having a monovalent hydrocarbon group having a carbon number of 11 to 15 is more preferable. When the carbon number of the above mercapto group is in a better range, it is advantageous in that it is possible to provide a skin cleansing material which is more excellent in foam discharge property at a low temperature when filled into a foaming container.

Further, as the above salt, an alkali metal salt, an alkaline earth metal salt, an amine salt or an amino acid salt is preferred, and among them, a salt of an alkali metal such as sodium or potassium, a substituted or unsubstituted ammonium salt is more preferred. . In addition, among these, sodium salt is particularly preferred. When the above salt is a sodium salt, it is advantageous in that it can provide a skin cleansing material which is more excellent in mildness to the skin.

Specific examples of the component (B) include N-lauroside methyltaurate, N-myristylmethyltaurate, N-palmitinylmethyltaurate, and N-stearin. Methyl taurate, tallow fatty acid methyl taurate, N-coconut fatty acid methyl taurate, N- 癸醯 methyl taurate, etc. Among these, especially good is N-coconut Oil fatty acid methyl taurate.

In addition, the above-mentioned component (B) may be used singly or in combination of two or more kinds as appropriate.

The content of the component (B) is not particularly limited and may be appropriately selected depending on the purpose, and it is preferably from 0.5% by weight to 10% by weight, more preferably from 1% by weight to 5%, based on the above-mentioned skin cleansing material. Wt%. When the content is less than 0.5% by weight, the fineness of the foam may be insufficient. When the content exceeds 10% by weight, the foam discharge property at a low temperature is poor when filled into a foamed container. On the other hand, when the above content is in a better range, it is advantageous in that it can be provided in the fineness of the foam and the foam discharge property at a low temperature when filled into a foaming container. Skin cleansing materials.

<(C) component>

The polyoxyethylene (hereinafter sometimes abbreviated as POE) at least one of the alkyl sulfosuccinate and the alkyl sulfosuccinate (component (C)) is not particularly limited, and may be used for the purpose. As a suitable choice, it is preferred to have a monovalent hydrocarbon group having a carbon number of 12 to 22 as its alkyl chain, and more preferably a monovalent hydrocarbon group having a carbon number of 12 to 14. When the carbon number of the alkyl chain is less than 12, it is not preferable in terms of skin irritation. When the carbon number of the alkyl chain exceeds 22, the foam discharge property at a low temperature is poor when it is filled in a foaming container. On the other hand, if the carbon number of the above alkyl chain is in a better range, it is advantageous in that it can provide mildness to the skin and foam ejection property at a low temperature when filled into a foaming container. More excellent skin cleansing materials.

Further, as the above salt, an alkali metal salt, an alkaline earth metal salt, or preferably An amine salt or an amine acid salt, more preferably a salt of an alkali metal such as sodium or potassium, a substituted or unsubstituted ammonium salt. In addition, among these, sodium salt is particularly preferred. When the above salt is a sodium salt, it is advantageous in that it can provide a skin cleansing material which is more excellent in mildness to the skin.

Further, as the above-mentioned ethylene addition molar number of the polyoxyethylene sulfosuccinate alkyl ester salt, it is preferably from 1 to 10, more preferably from 2 to 5. If the ethylene addition molar number is less than 1, the foaming property at a low temperature is poor when filled into a foaming container; if the ethylene addition molar number exceeds 10, the fineness of the foam is in terms of Not good. On the other hand, if the above-mentioned ethylene addition molar number is in a better range, it is advantageous in that it can provide foam spouting at low temperatures and fineness of foam when filled into a foaming container. More excellent skin cleansing materials.

Further, as the above component (C), among them, a polyoxyethylene sulfosuccinate alkyl ester salt is preferred.

Specific examples of the component (C) include POE (1) alkyl sulfosuccinate (12-14) ester salt, POE (2) sulfosuccinate alkyl (12-14) ester salt, and POE (3). Dialkyl (12-14) sulfosuccinate, dialkyl (12-14) ester of POE (5) sulfosuccinate, dialkyl (PO) (7) sulfosuccinate (12~14) Ester salt, POE (9) dialkyl (12-14) sulfosuccinate, POE (2) sulfosuccinate alkyl (12 ~ 15) ester, sulfosuccinic acid POE (2) single Oleamine salt, POE (4) coconut oil fatty acid isopropanol sulfonium sulfosuccinate, sulfosuccinic acid POE (5) Laurel oxime ethanol decylamine salt, sulfosuccinate undecylene oxime ethyl ester Salt, diethylhexyl sulfosuccinate, lauryl sulfosuccinate, month A glycerol polyoxyethylene ether sulfosuccinate or the like, among which POR(2) sulfosuccinate alkyl (12-14) ester disodium is preferred.

In addition, the above-mentioned (C) component may be used alone or in combination of two or more.

The content of the above component (C) is not particularly limited and may be appropriately selected depending on the purpose, and it is preferably from 1 wt% to 7 wt%, more preferably from 1.5 wt% to 6 wt%, in the above-mentioned skin cleansing material. . When the content is less than 1% by weight, the foaming property at a low temperature is poor when filled into a foaming container; and if the content exceeds 7 wt%, it is not preferable in terms of suppressing skin drying after washing. On the other hand, if the above content is in a better range, it is advantageous in that it can be provided in the foam ejecting property at a low temperature when filled into a foaming container, and in the extent that the skin does not dry after washing. More excellent skin cleansing materials.

<content ratio>

The content ratio of each component of the above (A) to (C) is (C) / [(A) + (B)] = 0.05 to 0.5 by weight ratio, preferably 0.1 to 0.4, more preferably 0.15~0.4. When the weight ratio is less than 0.05, the foam discharge property at a low temperature is insufficient when filled into a foam container; and when the weight ratio exceeds 0.5, the skin drying after washing is insufficient. On the other hand, if the above weight ratio is in a better range, it is advantageous in that it can provide foam ejectability at a low temperature when filled into a foaming container, and the extent that the skin does not dry after washing. More excellent skin cleansing materials.

<arbitrary component>

In the skin cleansing material of the present invention, in addition to the above components (A) to (C), optional components may be blended within the range in which the effects of the present invention are not impaired. The above-mentioned optional component can be appropriately selected from the components generally used for the skin cleansing material, and examples thereof include an anionic surfactant such as polyoxyethylene alkyl ether sulfate other than the above components (B) and (C), and oxidation. a nonionic surfactant such as an amine or a polyoxyethylene alkyl ether, an amphoteric surfactant other than the above component (A), an oil component, a polyoxonium group, an alcohol such as a lower or higher alcohol, a lanolin derivative, and a protein derivative. , acrylic resin dispersion, cationic polymer, anionic polymer, nonionic polymer, vitamins and other agents, fungicides, preservatives, pH adjusters, antioxidants, metal chelators, UV absorbers, plants and animals Extracts or derivatives thereof, pigments, perfumes, pigments, inorganic powders, clay minerals, nylon, polyethylene and other water-insoluble polymer powders, propylene glycol, ethanol, glycerin, water, etc.

<manufacturing>

The method for producing the skin cleansing material of the present invention is not particularly limited, and may be appropriately selected depending on the purpose, and for example, the above components (A) to (C), optional components, and water (total amount of skin cleansing materials) may be used. Obtained by mixing the remaining part in a manner of up to 100 wt%. Further, the apparatus for preparing the above-described skin cleansing material is not particularly limited and may be appropriately selected depending on the purpose. Among them, a plurality of stirring wings (propellers, turbines, dispersers, etc.) which have shearing force and can be integrally mixed are preferable. The stirring device. Further, the components (A) to (C) and the optional components may be used singly or in the form of a mixture containing two or more components when preparing the skin cleansing material.

<container>

Since the skin cleansing material of the present invention can suppress precipitation at a low temperature, it can be suitably used as a foaming container filling skin cleansing material which ejects a skin cleansing material into a foam shape. Therefore, the container for filling the skin cleansing material of the present invention is not particularly limited, and is preferably a foamed container; in addition, the above-mentioned skin cleansing material is also suitable for filling the above-mentioned skin cleansing material into a foaming container. A skin cleansing material product, or a liquid detergent product comprising a foaming container and a skin cleansing material filled into the foaming container.

Examples of the foam container include a non-gas type foam discharge container. The gas-free foam ejection container is not particularly limited as long as it can be ejected in a foamed state after mixing the skin cleansing material with air. For example, the bottle body can be squeezed by hand. A squeeze type foaming container for ejecting the foam, a pump type foaming container which can eject the foam by pressing the nozzle portion, and the like, and these foam ejecting containers can be appropriately selected depending on the purpose. As such a foaming container, for example, a container manufactured by Daiwa Can Co., Ltd., a container manufactured by Yoshino Industrial Co., Ltd., or the like can be used.

The gas-free foam ejection container generally has a porous film body (a plastic material such as nylon, polyester, polyolefin, etc.) for forming a foam, and the skin cleaning material is passed through the porous film body. And form a bubble. The mesh of the porous membrane body is not particularly limited and may be appropriately selected depending on the purpose. For example, it is preferably 100 or more meshes, more preferably 100 to 400 meshes, and particularly preferably 200 to 350 meshes. In addition, the above The number of sheets of the porous membrane body is not particularly limited, and may be appropriately selected depending on the purpose, and from the viewpoint of improving foam performance, it is preferably from 2 to 4 sheets.

More specifically, the above-mentioned foaming container can be preferably used in the foaming disclosed in Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Containers, etc.

<traits>

The properties of the skin cleansing material of the present invention are preferably liquid at normal temperature.

Further, when a foaming container is used, more specifically, for example, when a pump-type foaming container capable of ejecting a foam by pressing a nozzle portion and two porous membrane bodies of 200 mesh and 305 mesh are used, And under the temperature conditions used, as the viscosity of the above skin cleaning material, it is preferably 15 mPa or less. s, better is 1~10 mPa. s. Further, the above viscosity is a value measured by a BL type viscometer (Rotor No. 1, 60 rpm, 1 minute later / manufactured by Tokyo Keiki Co., Ltd.).

In addition, when the skin cleansing material is used in a bathroom or the like, steam or water may be mixed into the pump portion. When the skin cleaning material remains in the pump portion, the skin cleansing material may be diluted. Therefore, in terms of antiseptic property, the pH value (25 ° C) of the above skin cleansing material is preferably 4-6.

Further, the above-mentioned skin cleansing material is applied to hand washing as described below (in addition, in the present specification, "hand washing" means applying a foam-like skin cleansing material to the skin by hand. When the skin is cleaned, it is required that the foam ejected from the foamed container does not disappear immediately (foam persistence) Good) and easy to apply to the skin. Therefore, the viscosity (foam viscosity) of the foam-like skin cleansing material at this time is preferably about 2500~3100 mPa. s. If the above foam viscosity exceeds 3100 mPa. s, it is not good in terms of a slight thickening of the foam. On the other hand, if the above-mentioned foam viscosity is in a preferable range, the durability of the foam is good, and it is advantageous in providing a skin cleansing material suitable for hand washing. Further, the above-mentioned foam viscosity is a value measured by a viscosity test method according to the Japanese Pharmacopoeia general test method at 25 ° C using a B-type viscometer (NO 2 , a number of revolutions of 60 rpm, 30 seconds later / manufactured by Tokyo Keiki Co., Ltd.).

<Use>

The use of the skin cleansing material of the present invention is not particularly limited, and can be applied, for example, to shower gel, hand lotion, facial cleanser, and the like. Among them, the skin cleansing material of the present invention is suitable for use as a young child or a young woman, an older person or a sensitive skin in terms of a fine foam, an excellent degree of dryness of the skin after washing, and mildness to sensitive skin. Skin cleansing materials used.

(skin cleaning method)

The skin cleansing method of the present invention is characterized in that the above-described skin cleansing material of the present invention is used.

The skin cleansing method is not particularly limited and may be appropriately selected depending on the purpose. For example, the liquid skin cleansing material may be placed on a washing device such as sponge or nylon towel to be washed. a method of washing the skin after foaming on the appliance; or spraying the skin cleansing material filled into the foaming container as described above into a foam shape, and applying the above-mentioned sprayed foam to the skin by hand or using a detergent The method of cleaning up, etc. This Among them, the above-mentioned skin cleansing method is preferably the latter, and among them, a method of washing the above-mentioned sprayed foam on the skin by hand (cleaning by hand) is particularly preferable.

Further, in the above-described skin cleansing method, the skin portion to be cleaned is not particularly limited, and the whole body including the face and the hands and feet can be used as a washing object.

The conventional method of skin cleansing is generally to take about 3 g of liquid detergent on a sponge or nylon towel, and then wash the whole body, but in terms of usability, this method is inconvenient to foam. When the sanitary ware is continuously used, the skin is excessively rubbed. Therefore, there is a problem that the skin after washing is dried, and the amount of water evaporation through the skin is increased.

However, in the skin cleansing method of the present invention, it is preferred that the skin cleansing material is filled into a pump-type foaming container and ejected into a foam shape, so that it is simple in terms of usability. In addition, since the foam is fine at the time of ejection and the foam has a long-lasting durability, for example, by directly taking about 1 g of the foam by hand (about 1 g of one shot), and then applying it to the skin, it is possible to Clean the whole body with fewer ejections. Further, since the washing device is not used in such hand washing, it is possible to suppress dry skin after washing, increase the amount of moisture evaporation through the skin, and wash the skin more gently.

In addition, even when the sprayed foam of the above-mentioned skin cleansing material is placed on a washing appliance (for example, sponge, nylon towel, etc.) which is easy to rub the skin, the above-mentioned skin cleansing material is also foamed when it is ejected. It is fine and has a long-lasting foam. Therefore, it can suppress the dry skin after washing and the evaporation of water through the skin compared with the case of washing with a liquid detergent. The amount is increased and the skin can be gently cleaned.

[Examples]

Hereinafter, the present invention will be specifically described by way of examples and comparative examples, but the present invention is not limited to the following examples. In addition, in the following examples, when it is not specifically described, the "%" of the composition means wt%, the ratio shows the weight ratio, and the amount of each component in the table is the amount converted by purity.

[Examples 1 to 17 and Comparative Examples 1 to 6]

The skin cleansing material of the composition shown in Tables 1 to 4 was prepared according to the usual method, and the initial pH value of the obtained liquid skin cleansing material was adjusted to 5 (using a pH meter manufactured by East Asia Electric Wave Co., Ltd.: HM) After the measurement was carried out at -30 G, 400 mL of a pump container having a capacity of 500 mL with a dispenser was filled. In addition, 400 mL of the above liquid skin cleansing material was filled into a pump-type foaming vessel having a capacity of 500 mL (using one sheet of 200 mesh and one 305 mesh porous membrane body) to obtain a non-spray (non-spray) Aerosol) foamy skin cleansing material. Further, as the components in Tables 1 to 4, the products shown in Table 8 below were used.

The following evaluation was performed for the obtained skin cleansing material. The results are disclosed together in Tables 1 to 4.

- Foam squirting at low temperatures when filled into a foaming container -

After the non-sprayed foam-like skin cleansing material was stored at 5 ° C for one week, the operation of ejecting from the pump-type foaming vessel was repeated 300 times at 5 ° C, and the foam was sprayed at a low temperature based on the following evaluation criteria. Sexual evaluation. The evaluation was performed on 5 samples, and the results were expressed as average values.

<Evaluation criteria>

5: Unmixed with coarse foam, it can discharge fine foam.

4: Some of them are mixed with coarse foam, but they can be discharged with fine foam, and there is no problem in quality.

3: The whole is mixed with coarse foam, but it can be discharged with fine foam, and there is no problem in quality.

2: The whole is mixed with coarse foam, which cannot be discharged with fine foam, and there is a problem in quality.

1: No foam is formed, it cannot be discharged with fine foam, and there is a problem in quality.

- the delicateness of the foam -

Approximately 3 g of the liquid skin cleansing material was placed on a nylon towel moistened with tap water at 40 ° C to evaluate the fineness of the foam when the arm was washed. The evaluation was performed by 30 professional inspectors with high evaluation accuracy, and scored based on the following criteria, and the results were expressed as an average value.

<Evaluation criteria>

◎: 25 or more sensation foams have good fineness.

○: 20 to 24 people feel that the foam is fine.

△: 15 to 19 people feel that the foam is fine.

×: Less than or equal to 14 feels that the foam is fine.

- Increase in water evaporation through the skin -

It is generally known that if the skin protecting component is excessively removed by the skin cleansing material, the amount of water evaporation through the skin increases. If the barrier function of the skin is lowered and the amount of water evaporation through the skin is increased, a tingling sensation or a feeling of tingling after washing may be felt. Therefore, 4 people aged 30 to 39 The aged male functional inspector uses about 3 g of liquid skin cleansing material, washes the inner side of the upper arm by hand for 1 minute, and adapts to the skin at a temperature of 20 ° C and a humidity of 40% for 30 minutes. The water evaporation amount measuring device (manufactured by AS-TW2 ASAHI BIOMED Co., Ltd.) measures the amount of water evaporation through the skin five times for each person's arm. The rate of increase (%) after washing after the amount of moisture evaporation through the skin before washing is calculated based on the average value of the following five times, and is based on the average value of the four functional inspectors. An increase in the amount of moisture evaporation of the skin (a decrease in skin barrier function) was evaluated. The results are shown based on the following evaluation criteria. In addition, it can be said that the skin cleaning material having a lower rate of increase in the amount of moisture evaporation through the skin (higher evaluation reference value) than before washing is milder to the skin.

<式>

Increase rate (%) = [water evaporation after washing (average of 5 times) - water evaporation before washing (average of 5 times)] / water evaporation before washing (average of 5 times) Value) × 100

<Evaluation criteria>

5: Increase rate is less than or equal to 0%

4: The increase rate is 1~20%

3: The increase rate is 21~40%

2: The increase rate is 41~60%

1: increase rate is greater than or equal to 61%

- the extent to which the skin will not dry after washing -

Take 3 g of liquid skin cleansing material on a nylon towel moistened with tap water at 40 ° C to inhibit the dryness of the skin after washing the arm. Evaluation. The evaluation was performed by 10 professional inspectors with high evaluation accuracy, and scored based on the following criteria, and the results were expressed as an average value.

<Evaluation criteria>

◎: 8 or more of the 10 respondents suppressed the drying

○: 6 to 7 of 10 respondents suppressed drying

△: 4 to 5 of 10 respondents suppressed drying

×: 3 or less of the 10 respondents suppressed the drying

From the results of Tables 1 to 4, it is understood that the skin cleansing material of the present invention containing all (A) to (C) components and having a weight ratio of (C) / [(A) + (B)] within a fixed range (implementation) In the examples 1 to 17), the foaming material is fine, and when it is filled in a foaming container, the foaming property at a low temperature is excellent, and the skin cleansing material which can suppress dry skin after washing is excellent. On the other hand, the skin cleansing material which does not contain any of the components (A) to (C) or the weight ratio of (C)/[(A)+(B)] does not satisfy the fixed range (Comparative Examples 1 to 6) It is a skin cleansing material which is inferior in at least one of the fineness of the foam, the foam discharge property at a low temperature when filled in a foaming container, and the degree of drying of the skin after washing.

[Example 18: Liquid cleaning material formulated with an anti-inflammatory agent]

A liquid detergent material formulated with an anti-inflammatory agent prepared by the usual formulation is prepared by a usual method.

Ratio of (C)/[(A)+(B)] = 0.19

[Example 19: Deodorant and foam-like detergent material for sterilization] A deodorant having a blending composition shown below and a foam-like detergent material for sterilization were prepared by a usual method.

Ratio of (C)/[(A)+(B)] = 0.19

[Example 20: Mild liquid cleaning material for infants]

A mild liquid detergent for infants having the formulated composition shown below was prepared by a usual method.

Ratio of (C)/[(A)+(B)] = 0.23

Various evaluations of the skin cleansing materials of Examples 18 to 20 were carried out in the same manner as above. The results are shown in Table 5. The skin cleansing materials of Examples 18 to 20 are excellent skin cleansing materials which are fine in foam quality, good in foam discharge property at low temperatures when filled in a foaming container, and which can suppress drying after washing.

[Example 21: Evaluation of washing method]

In order to find a cleaning method suitable for the skin cleansing material of the present invention, the following evaluation was carried out.

- an increase in the amount of water evaporation through the skin produced by the cleaning method difference-

The skin cleansing material of Example 1 was filled into a pump-type foaming container (a porous film body of 200 meshes and a porous film body of 305 mesh), and about 1 g of the sprayed foam was placed in the hand. Or on a nylon towel moistened with tap water at 40 ° C, four male functional inspectors aged 30 to 39 wash the inner side of the upper arm for 1 minute, once a day for 5 days. After the cleaning on the fifth day, after accommodating for 30 minutes in an environment of a temperature of 20 ° C and a humidity of 40%, the skin evaporation device (AS-TW2 ASAHI BIOMED) was used to perform 5 times for each person's arm. Determination of the amount of water evaporation through the skin. Based on the average value of the five times, the rate of increase (%) after washing after the amount of moisture evaporation through the skin before washing is set to 100, based on the average value of the four-member inspectors. An increase in the amount of water evaporation through the skin (a decrease in skin barrier function) was evaluated. The results based on the following evaluation criteria are shown in Table 6. In addition, it can be said that the cleaning method of lowering the rate of evaporation of water passing through the skin (higher evaluation reference value) than before washing, the milder the skin.

<式>

Increase rate (%) = [water evaporation after washing (average of 5 times) - water evaporation before washing (average of 5 times)] / water evaporation before washing (average of 5 times) Value) × 100

<Evaluation criteria>

5: Increase rate is less than or equal to 0%

4: The increase rate is 1~20%

3: The increase rate is 21~40%

2: The increase rate is 41~60%

1: increase rate is greater than or equal to 61%

- the difference in the degree of drying that is not caused by the cleaning method -

The skin cleansing material of Example 1 was filled into a pump-type foaming container (a porous film body of 200 meshes and a porous film body of 305 mesh), and about 1 g of the sprayed foam was placed in the hand. Or wash the inner side of the upper arm with a nylon towel moistened with tap water at 40 ° C for 1 minute, once a day, for 5 days. The inhibition of skin dryness after washing on the fifth day was evaluated. The evaluation was performed by 10 professional inspectors with high evaluation accuracy, and scored based on the following criteria. The average value thereof is shown in Table 6 as a result.

<Evaluation criteria>

◎: 8 or more of the 10 respondents suppressed the drying

○: 6 to 7 of 10 respondents suppressed drying

△: 4 to 5 of 10 respondents suppressed drying

×: 3 or less of the 10 respondents suppressed the drying

It can be seen from the results of Table 6 that any of the skin cleansing materials of the present invention, which are washed by hand and washed with nylon towels, can be used to prevent the skin from drying out after washing and to inhibit moisture passing through the skin. Good results in terms of increased evaporation, especially in hand washing Significantly. It can be seen that the skin cleansing material of the present invention is a skin cleansing material which is particularly suitable for hand washing.

[Example 22: Evaluation of goodness of foam viscosity and foam durability]

When the skin cleansing material is applied to the hand washing as described above, it is required that the foam sprayed from the foamed container does not disappear immediately (the foam has a good durability) and is easily applied to the skin. Therefore, the foam viscosity of the skin cleansing material of the present invention and the goodness of foam durability were evaluated in the following manner.

-foam viscosity -

The skin cleansing materials of the above respective examples and comparative examples shown in Table 7 and commercially available skin cleansing materials were filled into a pump type foam container (one piece of 200 mesh porous film body, and one piece of 305 mesh) In the porous membrane of the purpose, according to the viscosity measurement method of the Japanese Pharmacopoeia general test method, a B-type viscometer (NO2, 60 rpm, 30 seconds later / manufactured by Tokyo Keiki Co., Ltd.) was used at 25 ° C. The foam viscosity of the sprayed foam. The results are shown in Table 7. Further, from the viewpoint of the fineness of the foam and the goodness of the foam durability, the following evaluation can be made: the foam viscosity is preferably about 2,500 to 3,100 mPa. s.

- the good degree of foam persistence -

The skin cleansing materials of the above respective examples and comparative examples shown in Table 7 and commercially available skin cleansing materials were filled into a pump type foam container (one piece of 200 mesh porous film body, and one piece of 305 mesh) In the target porous membrane body, about 5 g of the sprayed foam is placed in a SV100 small glass bottle and uniformly filled. Evaluation of foam durability. The height of the foam after the initial ejection of the foam and the foam height after 30 minutes were measured. Based on the fifth average value, the durability (%) after filling the discharged foam for 30 minutes when the height of the foam immediately after the ejection of the foam was set to 100 was calculated based on the following formula, and the foam durability was evaluated. The results obtained based on the following evaluation criteria are shown in Table 7. In addition, it can be said that the skin cleaning material having a higher durability ratio (higher evaluation reference value) than the one immediately after filling has a higher foam durability.

<式>

Persistence rate (%) = [the height of the foam after filling the sprayed foam for 30 minutes / the height of the foam immediately after filling the sprayed foam] × 100

<Evaluation criteria>

5: The persistence rate is greater than or equal to 90%

4: The persistence rate is 71~89%

3: The persistence rate is 51~70%

2: The persistence rate is 31~50%

1: The persistence rate is less than or equal to 30%

* The main components of commercial A: alkyl (C12 ~ 15) potassium phosphate / month Citrine dimethyl hydroxypropyl sulfobetaine / 1,3-butanediol / propylene glycol / glycerol = 10 / 3 / 2.5 / 0.3 / 2 (wt%)

**Main components of commercial B: cocoa potassium glycinate / undecyl hydroxyethyl imidazolinium betaine sodium / propylene glycol / glycerol = 13/4/12/8 (wt%)

***Marketing C: Plant Story Herb Blend Washing Foam (manufactured by Lion Co., Ltd.)

From the results of Table 7, it is understood that the skin cleansing material of the present invention has a better foam viscosity and foam durability than the skin cleansing material of the comparative example or a commercially available skin cleansing material. Therefore, it can be seen that the skin cleansing material of the present invention is a skin cleansing material which does not immediately disappear from the foamed container (good foam durability) and is easily applied to the skin, that is, it is suitable for hand washing and washing. Skin cleansing material.

Further, the sources of the respective components used in the above respective examples are as follows.

[Industrial availability]

The skin cleansing material of the present invention can be widely applied, for example, to shower gel, hand lotion, facial cleanser, etc., wherein the foam is fine, the skin is not dried after washing, and the sensitive skin is mild. The above skin cleansing material is suitable for use as a skin cleansing material for children or young women, older people or sensitive skin.

Further, the skin cleansing method using the above-described skin cleansing material is not particularly limited, and from the viewpoint of washing the skin more gently, the following hand washing method can be preferably employed, that is, no sponge, nylon towel, etc. are used. The detergent is placed on the hand by a foam-like skin cleansing material sprayed from the foaming container, and the foam is used to wash the skin.

Claims (5)

A skin cleansing material which is filled into a foaming container, the skin cleansing material comprising: (A) a betaine amphoteric surfactant; (B) N-mercaptomethyl taurate; (C) at least one of a polyoxyethylene sulfosuccinate alkyl ester salt and an alkyl sulfosuccinate salt, wherein the content ratio of each of the above components is (C) / [(A) by weight ratio +(B)]=0.15~0.4, the above (B)N-mercaptomethyltaurine salt is selected from the group consisting of N-coconut fatty acid methyl taurate, N-lauroside methyl taurate and At least one of the N-myristyl methyltaurate, at least one of the above (C) polyoxyethylene sulfosuccinate alkyl ester and the sulfosuccinate alkyl ester salt having a carbon number of 12~ A monovalent hydrocarbon group of 14 is used as its alkyl chain. The skin cleansing material according to claim 1, wherein the (A) betaine amphoteric surfactant is contained in an amount of 5 wt% to 15 wt%, and the above (B) N-mercaptomethyl taurate The content of at least one of the above (C) polyoxyethylene sulfosuccinate alkyl ester salt and sulfosuccinate alkyl ester salt is from 1.5% by weight to 6% by weight. A skin cleansing material as described in claim 1 or 2, which is for use on sensitive skin. A skin cleansing method using the skin cleansing material according to any one of claims 1 to 3. The skin cleansing method according to claim 4, wherein the foamy skin cleansing material sprayed from the foaming container is applied to the skin by hand to perform washing.