JP2013253057A - Skin cleansing agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin cleansing agent and a skin cleansing agent product excellent in foaming power when discharged from a foamer container even with low concentration fatty acid, good in sustentation of foam, not obstructed of discharging of foam due to clogging of a foam-forming part of the foamer container or viscosity rise of a preparation, and free from stickiness and dryness of skin after cleansing.SOLUTION: A skin cleansing agent for filling in the foamer container includes (A) a fatty acid salt expressed by formula: RCOOM (1) (wherein Ris a linear or branched monovalent hydrocarbon group, in which a part of hydrogen atoms bonded to carbon atoms may be substituted by a hydroxy group; and M represents an alkali metal atom or alkanolamine) and (B) a cationic polymer having a betaine group, where the mass content ratio of the component (B) to the component (A) expressed by (B)/(A) is 0.01 to 10.

Description

  The present invention relates to a skin cleanser and a skin cleanser product that are excellent in foam performance even when the amount of fatty acid salt used is reduced and are mild to the skin.

  Foam in the field of skin cleaning is regarded as important because it gives a feeling of satisfaction as a kind of presentation effect, and higher fatty acid salts are often used from the viewpoint of fineness of foam quality, detergency and the like. In addition, in order to obtain higher-quality foam, improvement in foam quality and foam persistence has been achieved by adding a cationic polymer to a detergent composition mainly composed of a higher fatty acid salt.

  Furthermore, from the viewpoint that fine foaming can be easily performed, a method of discharging with foam using a former pump has been proposed.

  However, the higher fatty acid salt has a high-quality foam texture, but has problems such as giving the skin sticky and soft after washing, and when the cationic polymer is filled in the pump former, There were problems such as clogging of the foam formation part and increase in the viscosity of the preparation, which prevented normal foam discharge.

In order to eliminate these problems, foam can be discharged normally with a former pump, so even low-concentration fatty acids can be easily foamed, the foam has good persistence, and the skin becomes sticky after washing. There has been a demand for a skin cleansing agent that is excellent in smoothness and lack of bulkiness.
In addition, the following are mentioned as prior art documents relevant to the present invention.

JP 2001-172166 A JP 2004-204087 A International Publication No. 2004/098558 JP 2001-181354 A JP-A-10-237490

  The present invention has been made in view of the above circumstances, and even when a low concentration fatty acid salt is discharged from a former container, it has excellent foaming properties, good foam persistence, clogging of foam forming portions of the former container, and preparations It is an object of the present invention to provide a skin cleanser and a skin cleanser product that does not hinder the discharge of foam due to an increase in the viscosity of the skin and that does not cause stickiness and roughness of the skin after washing.

  As a result of intensive studies to achieve the above object, the present inventors have formulated (B) a cationic polymer having a betaine group into a skin cleanser containing a fatty acid salt at a specific ratio. Even if the amount of fatty acid salt used is reduced to such a low level that normally breaks bubbles, it can be discharged from the former container without clogging, etc. It has been found that it is excellent in sustainability and can prevent stickiness and roughness of the skin after washing, and has led to the present invention.

Accordingly, the present invention provides the following skin cleanser and skin cleanser product.
[1]
(A) R ¹ COOM (1)
(In the formula, R ¹ is a linear or branched monovalent hydrocarbon group, and a part of the hydrogen atoms bonded to the carbon atom may be substituted with a hydroxyl group. M represents an alkali metal atom or an alkanolamine. Show.)
A fatty acid salt represented by
(B) a cationic polymer having a betaine group, and the mass ratio of the component (B) to the component (A) represented by (B) / (A) is 0.01 to 10, and the former container is filled A skin cleanser that is for use.
[2]
The skin cleansing agent according to [1], wherein the blending amount of the component (A) is 0.1 to 10% by mass and the blending amount of the component (B) is 0.005 to 5% by mass.
[3]
Component (B) is a methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / methacrylic acid methoxypolyethylene glycol copolymer, a methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / 2-hydroxyethyl methacrylate copolymer, and 2- The skin cleanser according to [1] or [2], which is selected from a copolymer of methacryloyloxyethyl phosphorylcholine and 2-hydroxy-3-methacryloyloxypropyltrimethylammonium chloride.
[4]
The skin cleansing material according to any one of [1] to [3], further comprising (C) a polyhydric alcohol.
[5]
A skin cleanser product comprising a former container and the skin cleanser according to any one of [1] to [4] filled in the former container.

  The skin cleansing agent of the present invention can discharge normal foam with a former pump, has a low concentration of fatty acid and has foaming and long-lasting foam, and has a non-sticky and soft skin after washing. It is excellent in nothing.

The skin cleansing material of the present invention comprises
(A) a fatty acid salt;
(B) a cationic polymer having a betaine group.

<(A) Fatty acid salt>
In this invention, (A) component is mix | blended in order to obtain favorable foaming property and persistence of foam. The following formula R ¹ COOM of the component (A) of the present invention
(R ¹ is a linear or branched monovalent hydrocarbon group, and a part of the hydrogen atoms bonded to the carbon atom may be substituted with a hydroxyl group. M represents an alkali metal atom or an alkanolamine.)
Examples of R ¹ of the fatty acid salt include a monovalent hydrocarbon group such as a linear or branched alkyl group or alkenyl group having 5 to 25 carbon atoms. Examples of fatty acids include caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, undecanoic acid, lauric acid, tridecylic acid, myristic acid, pentadecanoic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid , Serotic acid, caproleic acid, undecylenic acid, lauroleic acid, myristoleic acid, palmitoleic acid, oleic acid, elaidic acid, gondoic acid, erucic acid, ceracoleic acid, linoleic acid, linoelaidic acid, linolenic acid, arachidonic acid, 2- Ethylbutanoic acid, isopentanoic acid, 2-ethylpentanoic acid, 2-ethylhexanoic acid, isononanoic acid, tetramethylnonanoic acid, 2-hexyldecanoic acid, 3,5,5-trimethylhexanoic acid, isostearic acid, 12-hydroxystearic acid, Also, Coconut oil fatty acid is a mixture of these, hydrogenated coconut oil fatty acids, palm oil fatty acid, hydrogenated palm oil fatty acids, palm kernel oil fatty acid, hardened palm kernel oil fatty acid, tallow fatty acid, hardened tallow fatty acid, and the like. Among these, specific examples of preferable ones are lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, and coconut oil fatty acid, and more preferably lauric acid, myristic acid, and coconut oil fatty acid. . From the viewpoint of foamability and foam persistence, R ¹ is preferably a straight chain having 11 to 17 carbon atoms, and the salt (M) as a pair thereof is an alkali metal such as sodium or potassium, monoethanolamine, Examples include alkanolamines such as diethanolamine, triethanolamine, and diisopropanolamine, and potassium salts are preferable from the viewpoint of suppressing precipitation.

  The fatty acid salt may be blended itself, or the fatty acid and the salt may be blended separately in the skin cleansing agent and neutralized, and these (A) components may be used alone or in combination. Two or more species can be used in appropriate combination. It is more preferable to combine two or more kinds from the viewpoint that air bubbles are uniformly formed and the roughness after washing is suppressed. For example, it is preferable to use a combination of laurate and myristate, palmitate, stearate, behenate, palmitate and oleate, particularly potassium laurate and myristic acid. It is preferable to use potassium together.

As the blending ratio of the component (A), (fatty acid salt in which R ¹ is a monovalent hydrocarbon group having 11 or less carbon atoms) / (fatty acid salt in which R ¹ is a monovalent hydrocarbon group having 13 or more carbon atoms) ) Is 1.5 to 5 in terms of mass ratio, and more preferably 1.5 to 4 from the viewpoint of suppressing foaming properties, foam persistence and bulkiness after washing. If it is less than 1.5, it may be inferior to low-temperature stability, and if it exceeds 5, it may give a skin texture.

  As the content of the component (A), from the viewpoint of foaming properties and skin irritation, 0.1 to 10% by mass in the skin cleanser is particularly preferable as a fatty acid salt, and more preferably from the point of foaming properties. 0.5-5 mass%. If the amount is less than 0.1% by mass, the dischargeability from the container, foaming property, and foam persistence may be deteriorated. If the amount exceeds 10% by mass, the dischargeability, the decrease in roughness of the skin, and skin irritation may occur. May increase. On the other hand, when the content is within a preferable range, it is advantageous in that a more excellent skin cleanser can be provided in terms of foaming properties and lack of bulkiness of the skin after washing.

<(B) Cationic polymer having betaine group>
In the present invention, the component (B) is blended to assist foaming in the former container, improve foam persistence, and suppress stickiness of the skin after washing. The cationic polymer having a betaine group is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / methacrylic acid methoxypolyethylene glycol copolymer (trade name: Plus size L-440 [manufactured by Kyodo Chemical Industry Co., Ltd.], etc.), methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / 2-hydroxyethyl methacrylate copolymer (trade name: plus size L-450 [Kyoto Chemical Industry Etc.), 2-methacryloyloxyethyl phosphorylcholine and 2-hydroxy-3-methacryloyloxypropyltrimethylammonium chloride copolymer (trade name: Lipidure-C [NOF Corporation Ltd.] and the like). Among these, a methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / methoxypolyethylene glycol copolymer having a betaine group, a methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / 2-hydroxyethyl methacrylate copolymer, 2 -A copolymer of methacryloyloxyethyl phosphorylcholine and 2-hydroxy-3-methacryloyloxypropyltrimethylammonium chloride is preferred. More preferably, from the viewpoint of foam persistence, methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / methoxypolyethylene glycol copolymer, methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / 2-hydroxyethyl methacrylate It is a polymer. These cationic polymers having a betaine group may be used alone or in combination of two or more.

  The blending amount of the component (B) is preferably 0.005 to 5% by mass in the skin cleansing agent, and 0.05 to 1% by mass is more preferable from the viewpoint of dischargeability, foaming property and foam persistence. preferable. If the amount is less than 0.005% by mass, the foaming property is lowered and the function of sustaining the foam may not be exhibited. If the amount exceeds 5% by mass, the discharge property may be deteriorated or the skin immediately after towel drying may be sticky. is there.

  The blending ratio of the component (A) and the component (B) used in the present invention is such that the mass ratio represented by (B) / (A) is 0.01 to 10, and the foam persistence and the skin after washing From the point which does not give stickiness, Preferably it is 0.01-5, and 0.01-2 are especially preferable. When the mass ratio is less than 0.01, the foaming function and the foam persistence function may not be exhibited. When the mass ratio is more than 10, the ejection property from the container, the foaming property is deteriorated, or the skin immediately after towel drying is sticky. May cause.

<(C) Polyhydric alcohol>
In this invention, a polyhydric alcohol is mix | blended for the improvement of discharge property when filling a former container, suppression of mesh blockage, and better foaming property. Examples of the polyhydric alcohol include ethylene glycol, diethylene glycol, hexylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, isoprene glycol, glycerin, diglycerin, triglycerin, tetraglycerin, hexaglycerin, decaglycerin, Examples include 1,3-butylene glycol, trimethyl propanol, and an EO adduct of a polyhydric alcohol. In addition, the component (C) of the present invention includes sugar alcohols obtained by reducing the carbonyl group of the sugar molecule, and specific examples include sorbitol, mannitol, xylitol, arabitol, maltitol, lactitol and the like. Can be mentioned. Among these, as the component (C), propylene glycol, dipropylene glycol, glycerin, 1,3-butylene glycol, sorbitol and maltotetraose are preferable, and propylene glycol, dipropylene glycol, glycerin, sorbitol and maltotetraose are preferable. It is more preferable in that a good foam can be discharged. Moreover, these may be used individually by 1 type, respectively, and may use 2 or more types together.

  When using the skin cleansing material of the present invention in a former container, more specifically, for example, when using a pump former container capable of discharging bubbles by pushing down the nozzle part and two sheets of 200 mesh and 305 mesh In view of the fact that the occlusion of the mesh by the blending component affects the discharge properties, the content of the polyhydric alcohol is preferably 10 to 35% by mass, and more preferably 10 to 20% by mass in the skin cleanser. If the amount is less than 10% by mass, the sufficient mesh blockage suppressing effect may not be exhibited, and the discharge property may be deteriorated. If the amount exceeds 35% by mass, the foaming property and the persistence of the bubbles are deteriorated. The feeling may be impaired.

<Optional component>
In addition to the components (A) to (C), an optional component can be blended in the skin cleansing material of the present invention within a range that does not impair the effects of the present invention. As an optional component, it can be appropriately selected from those usually used in skin cleansing agents, for example, an anionic surfactant such as polyoxyethylene alkyl ether sulfate, amine oxide, polyoxyethylene alkyl ether and the like. Nonionic surfactants, amphoteric surfactants, oils, silicones, alcohols such as lower or higher alcohols, lanolin derivatives, protein derivatives, acrylic resin dispersions, cationic polymers excluding component (A), anionic polymers, nonions Chemical polymers, drugs such as vitamins, bactericides, preservatives, pH adjusters, antioxidants, sequestering agents, UV absorbers, animal and plant extracts or their derivatives, dyes, fragrances, pigments, inorganic powders, clay minerals, Examples thereof include water-insoluble polymer powders such as nylon and polyethylene, and water.

<PH>
As pH (25 degreeC) of the skin washing | cleaning material of this invention, 9-11 are preferable from a stability point. The pH of the preparation can be adjusted by adding potassium hydroxide, citric acid, etc. while confirming the pH after mixing all the components. More specifically, the purified water is balanced and mixed and stirred so that the total of components other than potassium hydroxide, citric acid and the like is about 98% by mass. In addition, in this invention, the measuring method of pH can be measured based on the quasi-drug raw material specification 2006 general test method pH measuring method. If necessary, it may be heated. While mixing and stirring, potassium hydroxide, citric acid and the like are gradually added, and each is added to the target pH while measuring the pH. When the target pH is reached, the remaining purified water is finally added to balance the water so that the total amount becomes 100% by mass.

<Container>
Since the skin cleansing material of the present invention can be discharged from the container without causing clogging of the container foam forming part, it is effective to be used by filling the former container. It can be made into a skin cleanser product comprising a skin cleanser product, a former container and a skin cleanser filled with 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, and can be appropriately selected according to the purpose. Examples thereof include a squeeze foamer container that can discharge bubbles by squeezing with a pump, and a pump former container that can discharge bubbles by pushing down a nozzle part. As such a former container, Daiwa Steel Co., Ltd., Yoshino Kogyo Co., Ltd., etc. can be used.

  A non-gas type foam discharge container usually has a porous membrane for forming bubbles (material is preferably a plastic material such as nylon, polyester, polyolefin, etc.), and the skin cleaning material passes through this porous membrane. By doing so, bubbles are formed. There is no restriction | limiting in particular as a mesh of a porous membrane body, Although it can select suitably according to the objective, For example, 100 mesh or more is preferable, 100-400 mesh is more preferable, 200-350 mesh is more preferable.

  There is no restriction | limiting in particular as the number of sheets of a porous membrane body, Although it can select suitably according to the objective, 2-4 sheets are preferable from a viewpoint of improving foam performance. More specifically, the former containers described in JP-A-7-315463, JP-A-8-230961, and JP-A-2005-193972 can be preferably used.

<Properties>
There is no restriction | limiting in particular as a property of the skin washing material of this invention, Although it can select suitably according to the objective, A liquid state is preferable at normal temperature. In addition, when using a former container, for example, when using two pump mesh containers and 200 mesh that can discharge bubbles by pushing down the nozzle, the viscosity of the skin cleanser under the temperature conditions used is: 15 mPa · s or less is preferable, and 1 to 10 mPa · s is more preferable. In the present invention, the viscosity can be measured at 25 ° C. using a BL type viscometer (rotor No. 1, 60 ppm, 1 minute later, manufactured by Tokyo Keiki Co., Ltd.).

<Manufacturing method>
There is no restriction | limiting in particular as a manufacturing method of the skin washing | cleaning material of this invention, According to the objective, it can select suitably, For example, (A), (B) component, (C) component, arbitrary component, as needed, and It can be obtained by mixing water (the balance is blended so that the total amount of the skin cleanser is 100% by mass). Moreover, there is no restriction | limiting in particular as an apparatus which prepares skin washing | cleaning material, According to the objective, it can select suitably, Especially the stirring provided with the several stirring blade (propeller, turbine, a disper, etc.) which can mix with a shear force and the whole. An apparatus is preferred. In addition, (A)-(C) component and an arbitrary component may be used individually by 1 type, respectively, and may be used in the state of the mixture containing 2 or more types of components, when preparing a skin washing | cleaning agent. Also good. The skin cleanser product of the present invention can be obtained by filling a former container with the obtained skin cleanser.

<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 foaming properties, excellent roughness of the skin after washing, and is mild to sensitive skin, so that it can be used for infants, young women, elderly people and sensitive skin. It is suitable as a skin cleansing agent for humans, particularly preferably for humans having dry skin, and particularly preferably used as a body soap.

  Next, the present invention will be described more specifically based on examples and comparative examples, but the present invention is not limited to the following examples. In the following examples, the component amounts described in the examples are all converted into pure components.

[Examples 1 to 52, Comparative Examples 1 to 8]
A skin cleanser having the composition shown in the following table was prepared according to a conventional method. The pH was adjusted to 10.2 with citric acid and potassium hydroxide. In addition, the measurement method of pH was measured based on the quasi-drug raw material standard 2006 general test method pH measurement method.
The obtained skin cleansing agent is filled with 100 mL in a 250 mL capacity pump former container (using two 200 mesh) manufactured by Yoshino Kogyo Co., Ltd., and discharged, foamed, and sustained foamed by the following evaluation methods. And the non-stickiness of the skin after washing and the non-stickiness of the skin after washing.

−Dischargeability−
Each skin cleanser was discharged from a former pump at 25 ° C., and the ease of discharge was evaluated. The evaluation was repeated 10 times, scored based on the following criteria, and the result was shown as an average value.
<Evaluation criteria>
5: Easily ejected 4: Easily ejected 3: Easily ejected 2: Easily ejected 1: Difficult to eject <Judgment criteria>
◎: 4.5 points or more ○: 3 points or more and less than 4.5 points △: 2 points or more and less than 3 points ×: Less than 2 points

-Foamability-
Each skin cleansing agent was discharged 5 times from a former pump into a hard glass vial (capacity 50 mL), and the foamability immediately after the discharge was visually evaluated. The evaluation was repeated 10 times, scored based on the following criteria, and the result was shown as an average value.
<Evaluation criteria>
5: A fine foam is present 4: A slightly coarse foam is present, and a slightly rough foam is present 3: A coarse foam is present, and a slightly coarse foam is present 2: A very coarse foam is present and is difficult to foam 1: Watery and no foaming <Criteria>
◎: 4.5 points or more ○: 3 points or more and less than 4.5 points △: 2 points or more and less than 3 points ×: Less than 2 points

-Persistence of foam-
Each skin cleanser is discharged 5 times into a hard glass vial (capacity: 50 mL) at 25 ° C with a former pump. The height of the foam is measured immediately after discharge and after 5 minutes, and the change in the height is maintained. Rated as a rate. The evaluation was repeated three times and scored based on the following criteria, and the results were shown as average values.
<Evaluation criteria>
Foam persistence = {foam height after 5 minutes (mm) / foam height immediately after discharge (mm)} × 100
◎: The bubble persistence is 90% or more ○: The bubble persistence is 70% or more to less than 90% Δ: The foam persistence is 50% or more to less than 70% ×: The foam persistence is less than 50%

-No sticky skin after washing-
About 1 g of each skin cleansing material was taken into a hand wet with 40 ° C. tap water, the arm was washed, and the non-stickiness of the skin after towel drying was evaluated. The evaluation was performed by 10 subjects with high evaluation accuracy, and the number of respondents who did not feel sticky was investigated.
<Evaluation criteria>
◎: 8 or more out of 10 responded that there was no stickiness ○: 6-7 out of 10 responded that there was no stickiness △: 4-5 out of 10 responded that there was no stickiness ×: 3 out of 10 Answer that there is no stickiness

-No skin roughness after washing-
About 1 g of each skin cleansing material was taken in a hand wet with tap water at 40 ° C., and the skin was not soft after the arm was washed 10 times within 10 hours. The evaluation was performed by 10 subjects with high evaluation accuracy, and the number of respondents who answered that it was not bulky was investigated.
<Evaluation criteria>
◎: Reply if 8 or more out of 10 people are not bulky ○: Reply if 6-7 in 10 are bulky △: Reply if 4-5 in 10 are bulky ×: 3 out of 10 Answer that the name is not too big

＊１ ヤシ油脂肪酸カリウムの脂肪酸組成：Ｃ１１以下６０質量％、Ｃ１３以上４０質量％

* 1 Fatty acid composition of coconut oil fatty acid potassium: C11 or less 60 mass%, C13 or more 40 mass%

  The skin cleansing agents of Examples shown below were prepared based on the conventional method for each preparation. Next, as a result of evaluation in the same manner as described above, it was excellent in foam dischargeability, foamability, and foam persistence, and good results on the non-stickiness of the skin after washing and the lack of roughness of the skin after washing (All ◎).

[Example 53] Body cleaner composition for former container
Composition (mass%)
Potassium laurate 2.0
Potassium myristate 0.5
Ethanolamine oleate 0.5
Cationic polymer-1 0.5
Lauryldimethylaminoacetic acid betaine 0.5
Lauric acid amidopropyl betaine 0.3
Propylene glycol 10.0
Fragrance 1.0
Appropriate amount of dye
Purified water balance
Total 100.0
(A) = 3.0, (B) = 0.5
(B) / (A) = 0.17
C11 or less / C13 or more = 2.0

[Example 54] Liquid detergent composition for filling a former container
Composition (mass%)
Malic acid monolauramide potassium salt 3.0
Potassium laurate 1.5
Potassium myristate 0.5
Cationic polymer-2 0.5
Palm oil fatty acid amidopropyl betaine 0.5
Propylene glycol 15.0
Rosemary extract 1.0
POE (5) hydrogenated castor oil 1.0
Jojoba oil 0.5
Methylparaben 0.3
Edetic acid 0.1
Hydroxyethane diphosphonic acid 0.1
Fragrance 1.0
Potassium hydroxide appropriate amount
Purified water balance
Total 100.0
(A) = 2.0, (B) = 0.5
(B) / (A) = 0.25
C11 or less / C13 or more = 3.0

[Example 55] Hand soap for former container
Composition (mass%)
Potassium laurate 4.0
Potassium myristate 1.0
Propylene glycol 6.0
Sorbitol 4.0
Cationic polymer-3 0.7
Lauryldimethylamine oxide 0.7
Alkyl acrylate polymer emulsion 5.0
Hydroxyethane diphosphonic acid 0.1
Edetic acid 0.2
Triclosan 0.1
Isopropylmethylphenol 0.1
Fragrance 1.0
Potassium hydroxide appropriate amount
Purified water balance
Total 100.0
(A) = 5.0, (B) = 0.7
(B) / (A) = 0.14
C11 or less / C13 or more = 4.0

[Example 56] Body cleaner for former container
Composition (mass%)
Potassium laurate 3.5
Potassium myristate 1.0
Potassium palmitate 0.5
Monoethanolamine 0.5
N-lauroyl-N-methyl-β-alanine sodium 3.0
Propylene glycol 6.5
Sorbitol 3.5
Cationic polymer-1 0.35
Cationic polymer-3 0.2
Lauryldimethylamine oxide 3.0
Edetic acid 0.2
Fragrance 1.0
Potassium hydroxide appropriate amount
Purified water balance
Total 100.0
(A) = 5.0, (B) = 0.55
(B) / (A) = 0.11

The raw materials used in Examples and Comparative Examples are shown in the following table.

  In addition, potassium laurate, potassium myristate, potassium stearate, potassium palmitate, and coconut oil fatty acid potassium are lauric acid: NAA-122 (manufactured by NOF Corporation), myristic acid: NAA-142 (NOF Corporation) )), Palmitic acid: NAA-171 (manufactured by NOF Corporation), stearic acid: NAA-174 (manufactured by NOF Corporation), oleic acid: NAA-34 (manufactured by NOF Corporation), palm Oil fatty acid: palm fatty acid (manufactured by Shin Nippon Rika Co., Ltd.), ethanolamine (manufactured by Mitsui Chemicals), diethanolamine (manufactured by Mitsui Chemicals, Inc.), triethanolamine (The Dow Chemical Company), water Potassium oxide (manufactured by Asahi Glass Co., Ltd., liquid caustic potash) was prepared by appropriately combining and neutralizing each.

Claims (5)

(A) R ¹ COOM (1)
(In the formula, R ¹ is a linear or branched monovalent hydrocarbon group, and a part of the hydrogen atoms bonded to the carbon atom may be substituted with a hydroxyl group. M represents an alkali metal atom or an alkanolamine. Show.)
A fatty acid salt represented by
(B) a cationic polymer having a betaine group, and the mass ratio of the component (B) to the component (A) represented by (B) / (A) is 0.01 to 10, and the former container is filled A skin cleanser that is for use.   The skin cleanser according to claim 1, wherein the blending amount of component (A) is 0.1 to 10% by mass and the blending amount of component (B) is 0.005 to 5% by mass.   Component (B) is a methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / methacrylic acid methoxypolyethylene glycol copolymer, a methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / 2-hydroxyethyl methacrylate copolymer, and 2- The skin cleanser according to claim 1 or 2, selected from a copolymer of methacryloyloxyethyl phosphorylcholine and 2-hydroxy-3-methacryloyloxypropyltrimethylammonium chloride.   The skin cleanser according to any one of claims 1 to 3, further comprising (C) a polyhydric alcohol.   A skin cleanser product comprising a former container and the skin cleanser according to any one of claims 1 to 4, which is filled in the former container.