JP6951916B2 - Liquid skin cleanser composition - Google Patents

Description

The present invention relates to a liquid skin cleansing composition.

Conventionally, liquid skin cleansing compositions such as hand soap and body soap have a large amount of foam, good foam performance such as creaminess of foam, and good skin condition after towel drying. It is desired to. In particular, recently, there has been a strong demand for providing a liquid skin cleansing composition having a high moisturizing property that can impart a moist feeling to the skin after towel drying.

In order to improve the condition of the skin after towel drying, for example, a detergent composition containing a fatty acid salt, a glycerin monoalkyl ether, and an amphoteric surfactant has been proposed (see, for example, Patent Document 1). However, in the above proposal, it is insufficient to achieve both the moist feeling of the skin after towel drying and the moist feeling of the skin after towel drying. Further, a liquid skin cleansing composition containing a fatty acid salt, a cationic polymer having a structural unit derived from dimethyldiallylammonium chloride, an amphoteric surfactant, and a glycerin monoalkyl ether has been proposed (for example, Patent Document 2). See ~ 4). However, in the above proposal, the alkyl group of the glycerin monoalkyl ether is short, and it is insufficient to achieve both a moist feeling of the skin after towel drying and a feeling of smoothness of the skin after towel drying. Moreover, the speed of foaming has not been sufficiently examined.

Therefore, a liquid skin cleansing composition that has a large amount of foam and can satisfy all of the creaminess of the foam, the speed of foaming, the moist feeling of the skin after towel drying, and the moist feeling of the skin after towel drying. The provision of goods is desired.

Japanese Unexamined Patent Publication No. 2001-172669 Japanese Unexamined Patent Publication No. 2013-087110 Japanese Unexamined Patent Publication No. 2012-232940 JP-A-2009-263289

An object of the present invention is to solve the above-mentioned problems in the past and to achieve the following object. That is, in the present invention, the amount of foam is large, the creaminess of the foam and the speed of foaming are good, and the liquid skin is excellent in the moist feeling of the skin after towel drying and the moist feeling of the skin after towel drying. It is an object of the present invention to provide a cleaning agent composition.

As a result of diligent studies by the present inventors in order to solve the above problems, (A) higher fatty acid salt, (B) cationic polymer, (C) surfactant, and (D) glycerin monoalkyl ether have been obtained. The liquid skin cleansing composition contained in the composition has a large amount of foam, creaminess of foam, quick foaming, a feeling of smoothness of the skin after towel drying, and skin after towel drying due to the synergistic effect of each component. It was found that the moist feeling is excellent.

ただし、前記一般式（２）中、ｎ、ｍ、及びｌは構造単位のモル比率（モル％）を示し、ｎ＋ｍ＋ｌ＝１００であり、前記ｎは、０〜３４、前記ｍは、２４〜３１、前記ｌは、３５〜７６である。 The present invention is based on the above-mentioned findings by the present inventors, and the means for solving the above-mentioned problems are as follows. That is,
<1> (A) Higher fatty acid salt containing all of laurate, myristate, and palmitate, 10% by mass to 30% by mass,
(B) At least one cationic polymer selected from the dimethyldiallylammonium chloride polymer and the dimethyldiallylammonium chloride-acrylic acid copolymer 0.2% by mass to 3% by mass,
(C) 0.5% by mass to 5% by mass of at least one surfactant selected from amphoteric surfactants, lauryldimethylamine oxides, and cationic surfactants, and (D) glycerin monoalkyl ether 0. Containing 1% by mass to 5% by mass,
The molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is 65 mol% or more.
The alkyl group in the glycerin monoalkyl ether of the component (D) has 16 to 18 carbon atoms.
The mass ratio [A / (mass%) of the content (mass%) of the component (A) and the sum of the content (mass%) of the component (B) and the content (mass%) of the component (C). B + C)] is a liquid skin cleaning agent composition characterized by being 2.0 to 40.
<2> (E) The liquid skin cleansing composition according to <1>, which further contains a copolymer represented by the following general formula (2).

However, in the general formula (2), n, m, and l represent the molar ratio (mol%) of the structural unit, and n + m + l = 100, where n is 0 to 34 and m is 24 to 31. , The l is 35-76.

According to the present invention, the above-mentioned problems in the prior art can be solved, the above-mentioned object can be achieved, the amount of foam is large, the creaminess of foam and the speed of foaming are good, and the skin after towel drying. It is possible to provide a liquid skin cleansing composition having an excellent moisturizing feeling and a moist feeling of the skin after towel drying.

(Liquid skin cleanser composition)
The liquid skin cleansing composition of the present invention contains (A) a higher fatty acid salt, (B) a cationic polymer, (C) a surfactant, and (D) a glycerin monoalkyl ether, and if necessary, (E) Contains a copolymer and other components.

<(A) Higher fatty acid salt>
The higher fatty acid salt of the component (A) is contained in order to improve the amount of foam, the creaminess of the foam, the moist feeling of the skin after towel drying, and the moist feeling of the skin after towel drying. There is.

The higher fatty acid salt of the component (A) contains any of laurate, myristic acid, and palmitate, and may further contain other higher fatty acid salts such as stearate, if necessary. ..

Examples of the counterion of the higher fatty acid salt of the component (A) include ions of alkali metals, ammonium, alkanolamines, basic amino acids and the like.
Examples of the alkali metal include sodium and potassium.
Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, 2-amino-2-methylpropanol, 2-amino-2-methylpropanediol and the like.
Examples of the basic amino acid include lysine and arginine.
Among these, potassium ions are preferable from the viewpoint of the large amount of foam and the creaminess of the foam.
The higher fatty acid salt of the component (A) is not particularly limited and may be blended as a higher fatty acid salt. However, the higher fatty acid and salts such as potassium hydroxide, triethanolamine and monoethanolamine are used. May be separately added to a compounding tank and subjected to a neutralization reaction to obtain a higher fatty acid salt.

The content of the higher fatty acid salt of the component (A) is determined from the viewpoints of the large amount of foam, the creaminess of the foam, the feeling of smoothness of the skin after towel drying, and the feeling of moistness of the skin after towel drying. It is 10% by mass to 30% by mass, preferably 20% by mass to 30% by mass, based on the total amount of the liquid skin cleansing composition. If the content is less than 10% by mass, the amount of foam and the creaminess of the foam are insufficient, and if it exceeds 30% by mass, the skin feels smooth after towel drying and towel drying. The moist feeling of the skin afterwards becomes insufficient.

The content of the lauric acid salt is preferably 3% by mass to 12% by mass, more preferably 7% by mass to 12% by mass, based on the total amount of the liquid skin cleansing composition. The content of the myristate is preferably 4% by mass to 14% by mass, more preferably 8% by mass to 14% by mass, based on the total amount of the liquid skin cleansing composition. The content of the palmitic acid salt is preferably 1% by mass to 7% by mass, more preferably 3% by mass to 7% by mass, based on the total amount of the liquid skin cleansing composition. When the contents of the laurate salt, the myristic acid salt, and the palmitate salt are out of the numerical range, the amount of foam, the creaminess of the foam, and the feeling of stickiness of the skin after towel drying, In addition, the moist feeling of the skin after towel drying may be insufficient.

The other higher fatty acid salt is not particularly limited as long as the effect of the present invention is not impaired, and can be appropriately selected depending on the intended purpose, but stearate is preferable.
The content of the stearate is not particularly limited and may be appropriately selected depending on the intended purpose, but is 20% by mass from the viewpoint of the large amount of bubbles with respect to the total amount of the higher fatty acid salt. The following is preferable, and 10% by mass or less is more preferable. The lower limit of the stearate content is preferably 0% by mass.

<(B) Cationic polymer>
The cationic polymer of the component (B) is at least one selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer, and has a feeling of stickiness on the skin after towel drying and a feeling of stickiness on the skin. It is contained to improve the moist feeling of the skin after towel drying.

ただし、前記一般式（１）中、ｎ、及びｍは各構造単位のモル比率（モル％）を示し、ｎ＋ｍ＝１００であり、前記ｍは６５モル％以上である。 The dimethyldiallylammonium chloride-acrylic acid copolymer among the components (B) is represented by the following general formula (1).

However, in the general formula (1), n and m indicate the molar ratio (mol%) of each structural unit, n + m = 100, and m is 65 mol% or more.

The molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer among the components (B) is 65 mol% or more from the viewpoint of the moist feeling of the skin after towel drying. Yes, 95 mol% is preferred. If the molar ratio is less than 65 mol%, the moist feeling of the skin after towel drying and the moist feeling of the skin after towel drying are insufficient.

The molar ratio of structural units in the dimethyldiallyl ammonium chloride-acrylic acid copolymer among the components (B) can be determined by measuring under the following measurement conditions by nuclear magnetic resonance (NMR).
[Measurement condition]
Solvent: heavy water (D ₂ O)
Measuring instrument: JNM-LA300 (300MHz, manufactured by JEOL Ltd.)

The weight average molecular weight of the cationic polymer of the component (B) is not particularly limited and may be appropriately selected depending on the intended purpose. However, from the viewpoint of the moist feeling of the skin after towel drying, 10,000 to 1 000,000 is preferable, and 15,000 to 450,000 is more preferable.
The weight average molecular weight of the cationic polymer of the component (B) is, for example, SEC-MALLS-RI system (measurement conditions: column: TSKgelα series α-M column 30 cm (manufactured by Tosoh Corporation), solvent: sodium nitrate 0.3M). It can be measured with an aqueous solution).

The viscosity of the copolymer solution having a solid content of 30% by mass to 44% by mass in the cationic polymer of the component (B) at 25 ° C. is 10 mPa · s to 15 from the viewpoint of the moist feeling of the skin after towel drying. 000 mPa · s is preferable, and 20 mPa · s to 12,000 mPa · s is more preferable.
The viscosity can be measured using, for example, a Brookfield viscometer LVF (manufactured by Brookfield).

As the cationic polymer of the component (B), an appropriately synthesized polymer may be used, or a commercially available product may be used. Examples of the commercially available product include the following.
Marcourt 100 (component name: dimethyldialylammonium chloride polymer, manufactured by Lubrizol, viscosity at 25 ° C. with solid content of 39% by mass to 44% by mass: 8,000 mPa · s to 12,000 mPa · s, weight average molecular weight: 150,000). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 6 rotations / minute using the rotor of 3.

Marcourt 106 (Component name: Dimethyldialylammonium chloride polymer, manufactured by Lubrizol, viscosity at 25 ° C. with a solid content of 30% by mass to 36% by mass: 20 mPa · s to 65 mPa · s, weight average molecular weight: 15,000) .. The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 60 rotations / minute using one rotor.

Marcourt 295 (Component name: Dimethyldiallylammonium chloride-acrylic acid copolymer, manufactured by Lubrizol, viscosity at 25 ° C. with a solid content of 35% by mass to 40% by mass: 3,500 mPa · s to 9,000 mPa · s, Weight average molecular weight: 190,000, n: m = 5: 95 (molar ratio) in the general formula (1), molar ratio of structural units derived from dimethyldialylammonium chloride is 95 mol%). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 30 rpm using the rotor of 4.

Marcourt 280 (ingredient name: dimethyldialylammonium chloride-acrylic acid copolymer, manufactured by Lubrizol, viscosity at 25 ° C. with a solid content of 39% by mass to 43% by mass: 3,000 mPa · s to 6,000 mPa · s, Weight average molecular weight: 450,000, n: m = 35: 65 (molar ratio) in the general formula (1), molar ratio of structural units derived from dimethyldialylammonium chloride is 65 mol%). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 60 rotations / minute using the rotor of 4.

Among these, as the cationic polymer of the component (B), Marcoat 100, Marcoat 106, and Marcoat 295 are preferable, and Marcoat 100 is more preferable, from the viewpoint of the moist feeling of the skin after towel drying.

The content of the cationic polymer of the component (B) is such that the liquid skin cleanser is used from the viewpoints of the large amount of foam, the moist feeling of the skin after towel drying, and the moist feeling of the skin after towel drying. It is 0.2% by mass to 3% by mass, preferably 0.3% by mass to 1% by mass, based on the total amount of the composition. If the content is less than 0.2% by mass, the moist feeling of the skin after towel drying and the moist feeling of the skin after towel drying are insufficient, and if it exceeds 3% by mass, the amount of foam is increased. Insufficient amount.

<(C) Surfactant>
The surfactant of the component (C) is at least one selected from amphoteric surfactants, lauryldimethylamine oxides, and cationic surfactants, and has a large amount of foam, creaminess of foam, and foaming. It is contained to improve the speed of the skin, the moist feeling of the skin after towel drying, and the moist feeling of the skin after towel drying.
The lauryldimethylamine oxide is a kind of nonionic surfactant.

The amphoteric tenside is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include amino acid amphoteric surfactants and betaine amphoteric surfactants. These may be used alone or in combination of two or more. Among these, betaine amphoteric surfactants are preferable.
The betaine-based amphoteric surfactant is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include betaine lauryldimethylaminoacetate and betaine amide propyl laurate. Among these, betaine lauryldimethylaminoacetate is preferable from the viewpoint of the moist feeling of the skin after towel drying and the moist feeling of the skin after towel drying.

Examples of the cationic surfactant include alkyltrimethylammonium salt, dialkyldimethylammonium salt, alkylammonium salt, benzalkonium salt, benzethonium salt, pyridinium salt, imidazolinium salt, and amidamine compound. These may be used alone or in combination of two or more.
Examples of the counter ion of the cationic surfactant include halogen ions such as chloride ion and bromide ion, methyl sulfate ion (CH ₃ OSO ₃ ⁻ ), and ethyl sulfate ion (CH ₃ CH ₂ OSO ₃ ⁻ ). Can be mentioned. Among these, alkyltrimethylammonium salt and benzalkonium salt are preferable, and specifically, stearyltrimethylammonium chloride and chloride are preferable from the viewpoint of the moist feeling of the skin after towel drying and the moist feeling of the skin after towel drying. Benzalkonium is preferred.

The content of at least one surfactant selected from the amphoteric surfactant, lauryldimethylamine oxide, and cationic surfactant of the component (C) includes a large amount of foam and creaminess of foam. 0.5% by mass to 5% by mass based on the total amount of the liquid skin cleansing composition from the viewpoints of quick foaming, moist feeling of the skin after towel drying, and moist feeling of the skin after towel drying. %, More preferably 0.8% by mass to 3% by mass. When the content is less than 0.5% by mass, the amount of foam, the speed of foaming, the feeling of stickiness of the skin after towel drying, and the feeling of moistness of the skin after towel drying become insufficient. If it exceeds 5% by mass, the creaminess of the foam becomes insufficient.

[Mass ratio [A / (B + C)]]
The mass ratio [A / (mass%) of the content (mass%) of the component (A) and the sum of the content (mass%) of the component (B) and the content (mass%) of the component (C). B + C)] is 2.0 to 40, preferably 6 to 25, from the viewpoint of the large amount of foam, the moist feeling of the skin after towel drying, and the moist feeling of the skin after towel drying. If the mass ratio [A / (B + C)] is less than 2.0, the amount of foam is insufficient, and if it exceeds 40, the skin feels smooth after towel drying and after towel drying. The moist feeling of the skin becomes insufficient.

<(D) Glycerin monoalkyl ether>
The glycerin monoalkyl ether of the component (D) is contained in order to improve the moist feeling of the skin after towel drying and the moist feeling of the skin after towel drying.

The number of carbon atoms of the alkyl group in the glycerin monoalkyl ether of the component (D) is 16 to 18. If the number of carbon atoms of the alkyl group is less than 16, the feeling of stickiness of the skin after towel drying and the feeling of moistness of the skin after towel drying become insufficient, and those exceeding 18 are difficult to obtain.

Examples of the glycerin monoalkyl ether of the component (D) include glycerin monooleyl ether (alkyl group carbon number: 18), glycerin monostearyl ether (alkyl group carbon number: 18), and glycerin monocetyl ether (alkyl group). Carbon number: 16) and the like. These may be used alone or in combination of two or more. Among these, monooleyl glyceryl ether is preferable from the viewpoint of the moist feeling of the skin after towel drying and the moist feeling of the skin after towel drying.

The content of the glycerin monoalkyl ether of the component (D) is such that the liquid skin cleansing is performed from the viewpoint of a large amount of foam, a feeling of moisturizing the skin after towel-drying, and a feeling of moisturizing the skin after towel-drying. It is 0.1% by mass to 5% by mass, preferably 0.5% by mass to 3% by mass, based on the total amount of the agent composition. If the content is less than 0.1% by mass, the moist feeling of the skin after towel drying and the moist feeling of the skin after towel drying are insufficient, and if it exceeds 5% by mass, the amount of foam is increased. Insufficient amount.

<(E) Copolymer>
The copolymer of the component (E) is contained in order to improve the smoothness of the skin during rinsing.

ただし、前記一般式（２）中、ｎ、ｍ、及びｌは構造単位のモル比率（モル％）を示し、ｎ＋ｍ＋ｌ＝１００であり、前記ｎは、０〜３４、前記ｍは、２４〜３１、前記ｌは、３５〜７６である。これらの中でも、すすぎ時の肌のなめらかさの点から、前記一般式（２）におけるモル比率（ｎ：ｍ：ｌ）は（０：３０：７０）が好ましい。 Examples of the copolymer of the component (E) include a copolymer represented by the following general formula (2).

However, in the general formula (2), n, m, and l represent the molar ratio (mol%) of the structural unit, and n + m + l = 100, where n is 0 to 34 and m is 24 to 31. , The l is 35-76. Among these, the molar ratio (n: m: l) in the general formula (2) is preferably (0:30:70) from the viewpoint of smoothness of the skin during rinsing.

The molar ratio of each monomer in the copolymer of the component (E) can be determined by measuring under the following measurement conditions by nuclear magnetic resonance (NMR).
[Measurement condition]
Solvent: heavy water (D ₂ O)
Measuring instrument: JNM-LA300 (300MHz, manufactured by JEOL Ltd.)

The weight average molecular weight of the copolymer of the component (E) is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 100,000 to 3,000,000, preferably 150,000 to 1. , 600,000 is more preferable. The weight average molecular weight of the copolymer of the component (E) is, for example, SEC-MALLS-RI system (measurement conditions: column: TSKgelα series α-M column 30 cm (manufactured by Tosoh Corporation), solvent: sodium nitrate 0.3M). It can be measured with an aqueous solution).

The viscosity of the copolymer solution having a solid content of 8% by mass to 45% by mass in the copolymer of the component (E) at 25 ° C. is not particularly limited and may be appropriately selected depending on the intended purpose. , 1,200 mPa · s to 16,000 mPa · s, more preferably 7,500 mPa · s to 15,000 mPa · s.
The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield).

As the copolymer of the component (E), an appropriately synthesized copolymer may be used, or a commercially available product may be used. Examples of the commercially available product include the following.
Marcourt 550PR (component name: dimethylallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol, viscosity at 25 ° C. with solid content of 8.8% by mass to 9.8% by mass: 7,500 mPa · s to 15,000 mPa S, weight average molecular weight: 1,600,000, n: m: l = 0:30:70 in the general formula (2). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 10 rotations / minute using the rotor of 4.

Marcourt 740 (ingredient name: dimethylallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol, viscosity at 25 ° C. with a solid content of 41% by mass to 45% by mass: 1,200 mPa · s to 4,500 mPa · s, weight Average molecular weight: 120,000, n: m: l = 0: 24: 76 in the general formula (2). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 10 rotations / minute using the rotor of 3.

Marcourt 3330PR (Component name: Acrylic acid-dimethyldiallyl ammonium chloride-acrylamide copolymer, manufactured by Lubrizol, viscosity at 25 ° C. with a solid content of 10.2% by mass to 11.5% by mass: 1,000 mPa · s ~ 6,000 mPa · s, weight average molecular weight: 1,500,000, n: m: l = 34: 31: 35 in the general formula (2). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 30 rotations / minute using the rotor of 4.

Marcourt 3331PR (Component name: Acrylic acid-dimethyldiallyl ammonium chloride-acrylamide copolymer, manufactured by Lubrizol, viscosity at 25 ° C. with solid content of 9.7% by mass to 10.7% by mass: 2,000 mPa · s ~ 12,000 mPa · s, weight average molecular weight: 1,600,000, n: m: l = 22.5: 26.5:51 in the general formula (2). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 30 rotations / minute using the rotor of 5.

Marcourt 3940 (Component name: Acrylic acid-Dimethyldialyl ammonium chloride-acrylamide copolymer, manufactured by Lubrizol, viscosity at 25 ° C. with a solid content of 41% by mass to 45% by mass: 1,500 mPa · s ~ 4,500 mPa ·. s, weight average molecular weight: 150,000, n: m: l = 31: 29: 40 in the general formula (2). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 10 rotations / minute using the rotor of 3.

Among these, as the copolymer of the component (E), Marcoat 550PR is preferable from the viewpoint of smoothness of the skin during rinsing.

The content of the copolymer of the component (E) is 0.2 with respect to the total amount of the liquid skin cleansing composition from the viewpoint of the large amount of foam and the smoothness of the skin during rinsing. It is preferably from% to 3% by mass, more preferably from 0.5% by mass to 1% by mass. If the content is less than 0.2% by mass, the smoothness of the skin at the time of rinsing may be insufficient, and if it exceeds 3% by mass, the amount of foam may be insufficient. be.

<Other ingredients>
In addition to the above-mentioned components (A) to (E), the liquid skin cleansing composition of the present invention may contain other components as necessary within a range that does not impair the effects of the present invention. can.
Examples of the other components include purified water, water-soluble polymers other than the cationic polymer of the component (B) and the copolymer of the component (E), oils, lower alcohols such as higher alcohols, and lanolin. Derivatives, protein derivatives, acrylic resin dispersions, chemicals such as vitamins, bactericides, preservatives, viscosity regulators, pH regulators, antioxidants, metal sequestering agents, UV absorbers, animal and plant extracts or derivatives thereof, pigments, Examples thereof include water-insoluble polymer powders such as fragrances, pigments, inorganic powders, clay minerals, nylons and polyethylenes. These may be used alone or in combination of two or more.

-Manufacturing method-
The method for producing the liquid skin cleansing composition of the present invention is not particularly limited and may be appropriately selected depending on the intended purpose. The components (A) to (D) and, if necessary, (E). It can be obtained by mixing the ingredients, the other ingredients, and the purified water (the remaining amount is blended so that the entire liquid skin cleansing composition is 100% by mass).

Specifically, it can be manufactured as follows. The glycerin monoalkyl ether of the component (D) and the higher fatty acid salt of the component (A) are dissolved in purified water heated to 70 ° C. to 80 ° C. and cooled to 40 ° C. or lower, and then the component (B) is described. Can be produced by adding the cationic polymer of the above component (C), the surfactant of the component (C), and, if necessary, the copolymer of the component (E).

The liquid skin cleansing composition may be prepared using an apparatus. The device is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a stirring device having a shearing force and having a stirring blade capable of mixing the whole.
The stirring blade is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a propeller, a turbine and a dispenser.

−pH−
The pH of the liquid skin cleansing composition at 25 ° C. is preferably 9.5 to 11.0, more preferably 9.8 to 10.6, from the viewpoint of the large amount of foam. When the pH value is in the numerical range, the amount of foam is large and the moist feeling after towel drying is good.
The pH can be measured using, for example, a pH meter (HM-30R, manufactured by TOA DKK Corporation).

-Viscosity-
The viscosity of the liquid skin cleansing composition at 25 ° C. is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 1 mPa · s to 6,000 mPa · s, and is preferably 50 mPa · s to 4, 000 mPa · s is more preferable.
The viscosity can be measured, for example, using a BM type viscometer (manufactured by Tokyo Keiki Co., Ltd.) at a sample temperature of 25 ° C. under the following conditions. If the viscosity is 1 mPa · s to 3,000 mPa · s, the BM adapter, the rotation speed of 30 rpm, No. The viscosity after 1 minute was measured using the rotor of No. 3, and if it exceeded 3,000 mPa · s, the BM adapter, the rotation speed of 30 rpm, No. It can be measured by measuring the viscosity after 1 minute with the rotor of 4.

-Container-
The liquid skin cleansing composition of the present invention is not particularly limited, and is used by filling it in a normal container.
The container is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a pump dispenser container, a tube, a former container, and a bag-shaped container. Among these, a pump dispenser container is preferable. Examples of the pump dispenser container include a pump dispenser container manufactured by Yoshino Kogyosho Co., Ltd. with a nozzle diameter (inner diameter) of 3.5 mm and a discharge rate of 3 mL.

-Use-
The liquid skin cleansing composition of the present invention has a good amount of foam, creaminess of foam, and quick foaming, and has a feeling of smoothness on the skin after towel drying and skin after towel drying. Since it has an excellent moist feeling, it is used, for example, for washing pigments, hand soaps, body soaps, cleansing foams, makeup removers, etc., and is particularly preferably used for body soaps.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples, but the present invention is not limited to the following Examples. The contents of each component described in Examples and Comparative Examples are all values converted to pure content.

(Examples 1 to 31 and Comparative Examples 1 to 18)
Liquid skin cleansing compositions having the compositions and contents shown in Tables 1 to 9 below were prepared by a conventional method. Specifically, it was prepared by the following method.
The amount of purified water to be 95% by mass of the total amount of the finally obtained liquid detergent composition is heated to 70 ° C. to 80 ° C. to dissolve the component (A) and cooled to 40 ° C. or lower. , (B) component or (B) comparative component, (C) component or (C) comparative component, (D) component or (D) comparative component was added to prepare a liquid skin cleansing composition. After that, if the pH is less than the predetermined pH, potassium hydroxide, which is a common component, is added, the pH is adjusted to the predetermined pH, and purified water is added so that the total amount becomes 100% by mass, and the target liquid skin is added. A detergent composition was obtained. A propeller was used as the stirring blade, and a three-one motor (HEIDON BL1200, manufactured by Shinto Kagaku Co., Ltd.) was used for stirring. The pH was measured at 25 ° C. using a pH meter (HM-30R, manufactured by TOA DKK Corporation). The liquid skin cleansing compositions of Examples 1 to 31 and Comparative Examples 1 to 18 obtained were containers with a pump dispenser (discharge amount 3 mL, nozzle diameter (inner diameter) 3.5 mm, manufactured by Yoshino Kogyosho Co., Ltd.). ) Was filled.

Next, for each of the obtained liquid skin cleansing compositions, "a large amount of foam", "creamy foam", "quick foaming", and "skin after towel drying" are as follows. The "feeling of smoothness" and "feeling of moisturized skin after towel drying" were evaluated. The results are also shown in Tables 1 to 9 below.

<Large amount of foam, creaminess of foam, and speed of foaming>
Ten expert evaluators put 2 pushes (about 6 g) of the liquid skin cleansing composition of Examples 1 to 31 and Comparative Examples 1 to 18 on a nylon towel that was lightly moistened with warm water at 40 ° C. When the nylon towel was rubbed 10 times and foamed, the amount of foam, the creaminess of the foam, and the speed of foaming were observed and evaluated according to the following evaluation criteria. As a result, the average evaluation points of the 10 expert evaluators were obtained, and "a large amount of foam", "creaminess of foam", and "quickness of foaming" were evaluated. When the average evaluation score is 3.0 points or more, "a large amount of foam", "creaminess of foam", and "quickness of foaming" are good.
-Evaluation criteria for "a large amount of bubbles"-
5 points: Foam overflows from nylon towel 4 points: 70% or more and less than 100% of nylon towel is covered with foam 3 points: 50% or more and less than 70% of nylon towel is covered with foam 2 points: 20% or more and less than 50% of nylon towels are covered with foam 1 point: Less than 20% of nylon towels are covered with foam or almost no foam-Criteria for "creaminess of foam"-
5 points: Most of the bubbles are fine bubbles and very creamy. 4 points: Large bubbles are mixed in some of the fine bubbles, but they are creamy. 3 points: Half of the large bubbles are in the fine bubbles. Mixed and slightly creamy 2 points: More large and coarse bubbles than fine bubbles and not creamy 1 point: Only large and coarse bubbles were formed and not creamy at all-Evaluation of "quickness of foaming" Criteria-
5 points: Very fast 4 points: Fast 3 points: Slightly fast 2 points: Slightly slow 1 point: Slow

<Skin feels smooth after towel drying and moisturized skin after towel drying>
Ten expert evaluators put 2 pushes (about 6 g) of the liquid skin cleansing composition of Examples 1 to 31 and Comparative Examples 1 to 18 on a nylon towel moistened with warm water at 40 ° C. and lightly moistened. After rubbing the whole body with the nylon towel, the liquid skin cleansing composition was rinsed with warm water at 40 ° C., and the water droplets were wiped off with the towel. Then, the "feeling of the skin after towel-drying" and the "feeling of moisturizing the skin after towel-drying" were evaluated according to the following evaluation criteria, respectively. As a result, the average evaluation score of the 10 expert evaluators was obtained, and the "feeling of the skin after towel drying" and "the feeling of moisturizing the skin after towel drying" were evaluated. If the average evaluation score is 3.0 points or more, the "feeling of the skin after towel-drying" and the "feeling of moisturizing the skin after towel-drying" are good.
-Evaluation criteria for "feeling of skin feeling after towel drying"-
5 points: Strongly feels the swelling 4 points: Feels the swelling 3 points: Slightly feels the swelling 2 points: Does not feel the swelling so much 1 point: Does not feel the swelling at all- "Moisturized skin after towel drying" Evaluation criteria for "feeling"-
5 points: I feel a strong moist feeling 4 points: I feel a moist feeling 3 points: I feel a little moist feeling 2 points: I do not feel a lot of moist feeling 1 point: I do not feel a moist feeling at all

(Examples 32 to 36)
The liquid skin cleansing composition having the composition and content shown in Table 10 below was prepared by a conventional method. Specifically, it was prepared by the following method.
The amount of purified water to be 95% by mass of the total amount of the finally obtained liquid detergent composition is heated to 70 ° C. to 80 ° C. to dissolve the component (A) and cooled to 40 ° C. or lower. , (B) component, (C) component, (D) component, and (E) component were added to prepare a liquid skin cleansing composition. After that, if the pH is less than the predetermined pH, potassium hydroxide, which is a common component, is added, the pH is adjusted to the predetermined pH, and purified water is added so that the total amount becomes 100% by mass, and the target liquid skin is added. A detergent composition was obtained. A propeller was used as the stirring blade, and a three-one motor (HEIDON BL1200, manufactured by Shinto Kagaku Co., Ltd.) was used for stirring. The pH was measured at 25 ° C. using a pH meter (HM-30R, manufactured by TOA DKK Corporation). Also, each liquid skin cleansing composition obtained in Examples 3 2-36 were filled pump dispenser with the container (discharge amount 3 mL, nozzle diameter (inner diameter) 3.5 mm, manufactured by Yoshinokogyosho Ltd.).

Next, for each of the obtained liquid skin cleansing compositions, in the same manner as in Example 1, "a large amount of foam", "creamy foam", "quick foaming", and "after towel drying". The "feeling of moisturizing skin" and "feeling of moisturizing skin after towel drying" were evaluated. Further, in addition to the above evaluation, "smoothness of the skin at the time of rinsing" was evaluated as follows. The results are also shown in Table 10 below.

<Skin smoothness when rinsing>
Ten expert evaluators took 2 pushes (about 6 g) of the liquid skin cleansing composition of Examples 32 to 36 on a nylon towel moistened with warm water at 40 ° C and lightly moistened, and rubbed it 10 times to whisk. After rubbing the whole body with the nylon towel, the liquid skin cleansing composition was rinsed with warm water at 40 ° C. Immediately after rinsing, "smoothness of the skin during rinsing" was evaluated according to the following evaluation criteria. As a result, the average evaluation score of the 10 expert evaluators was obtained, and "smoothness of the skin at the time of rinsing" was evaluated. If the average evaluation score is 3.0 points or more, the "smoothness of the skin during rinsing" is good.
-Evaluation criteria for "skin smoothness during rinsing"-
5 points: Strongly feel the smoothness of the skin during rinsing 4 points: Feel the smoothness of the skin during rinsing 3 points: Feel the smoothness of the skin during rinsing 2 points: Feel the smoothness of the skin during rinsing too much I don't feel 1: I don't feel the smoothness of the skin when rinsing

The details of the various components used in the examples and the comparative examples are shown in Tables 11 to 12 below.

※１：ラウリン酸カリウムは、ラウリン酸（ＮＡＡ−１２２、日油株式会社製）を、水酸化カリウム（液体苛性カリ、旭硝子株式会社製）を用いて１００％中和したものである。
※２：ミリスチン酸カリウムは、ミリスチン酸（ＮＡＡ−１４２、日油株式会社製）を、水酸化カリウム（液体苛性カリ、旭硝子株式会社製）を用いて１００％中和したものである。
※３：パルミチン酸カリウムは、パルミチン酸（ＮＡＡ−１６０、日油株式会社製）を、水酸化カリウム（液体苛性カリ、旭硝子株式会社製）を用いて１００％中和したものである。
※４：ステアリン酸カリウムは、ステアリン酸（ＮＡＡ−１８０、日油株式会社製）を、水酸化カリウム（液体苛性カリ、旭硝子株式会社製）を用いて１００％中和したものである。

* 1: Potassium laurate is 100% neutralized lauric acid (NAA-122, manufactured by NOF CORPORATION) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
* 2: Potassium myristate is 100% neutralized myristic acid (NAA-142, manufactured by NOF CORPORATION) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
* 3: Potassium palmitate is 100% neutralized palmitic acid (NAA-160, manufactured by NOF CORPORATION) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
* 4: Potassium stearate is 100% neutralized stearic acid (NAA-180, manufactured by NOF CORPORATION) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).

＊１：ブルックフィールド粘度計ＬＶＦ（ブルックフィールド社製）、スピンドルＮｏ．３、６回転／分間、２５℃
＊２：ブルックフィールド粘度計ＬＶＦ（ブルックフィールド社製）、スピンドルＮｏ．１、６０回転／分間、２５℃
＊３：ブルックフィールド粘度計ＬＶＦ（ブルックフィールド社製）、スピンドルＮｏ．４、３０回転／分間、２５℃
＊４：ブルックフィールド粘度計ＬＶＦ（ブルックフィールド社製）、スピンドルＮｏ．４、６０回転／分間、２５℃ -(B) component and (B) comparative component or (E) component-

* 1: Brookfield Viscometer LVF (manufactured by Brookfield), Spindle No. 3, 6 rpm, 25 ° C
* 2: Brookfield Viscometer LVF (manufactured by Brookfield), Spindle No. 1,60 rpm, 25 ° C
* 3: Brookfield Viscometer LVF (manufactured by Brookfield), Spindle No. 4, 30 rpm, 25 ° C
* 4: Brookfield Viscometer LVF (manufactured by Brookfield), Spindle No. 4, 60 rpm, 25 ° C

The liquid skin cleansing composition of the present invention has a large amount of foam, good foam creaminess and quick foaming, a feeling of moisturizing the skin after towel drying, and moisturizing the skin after towel drying. Since it has an excellent feeling, it is used, for example, for washing pigments, hand soaps, body soaps, cleansing foams, makeup removers, etc., and is particularly preferably used for body soaps.

Claims (4)

(A) Higher fatty acid salt containing all of laurate, myristate, and palmitate from 10% to 30% by mass,
(B) Dimethyldialylammonium chloride polymer 0 . 2% by mass to 3% by mass,
(C) lauryl dimethylamino acetic Betai down 0. Containing 5% by mass to 5% by mass, and (D) glycerin monoalkyl ether 0.1% by mass to 5% by mass,
The content of lauric acid salt of the component (A) is 9% by mass to 12% by mass .
The number of carbon atoms in the alkyl group in the glycerin monoalkyl ether before SL component (D) is 16 to 18,
The mass ratio [A / (mass%) of the content (mass%) of the component (A) and the sum of the content (mass%) of the component (B) and the content (mass%) of the component (C). B + C)] is a liquid skin cleansing composition comprising 12.5 to 40. The content of myristic acid salt of the component (A) is 4% by mass to 14% by mass.
The content of palmitate of the component (A) is 1% by mass to 7% by mass.
The liquid skin cleansing composition according to claim 1, wherein the stearate content of the component (A) is 20% by mass or less. (E) The liquid skin cleansing composition according to any one of claims 1 to 2, further comprising a copolymer represented by the following general formula (2).

However, in the general formula (2), n, m, and l represent the molar ratio (mol%) of the structural unit, and n + m + l = 100, where n is 0 to 34 and m is 24 to 31. , The l is 35-76. The liquid skin cleansing composition according to claim 3, wherein the content of the component (E) is 0.5% by mass to 1% by mass.