JP7291009B2 - Liquid skin cleanser composition - Google Patents

Description

The present invention relates to liquid skin cleanser compositions.

Liquid skin cleansing compositions such as body soaps and hand soaps are required to have excellent moisturizing properties. In order to obtain excellent moisturizing properties, it is necessary to solve the problem that moisturizing ingredients are washed away during rinsing and do not sufficiently remain on the skin, and to improve the creaminess of the foam, which is an important performance in giving a moisturizing feeling. can be considered.

So far, by blending a higher fatty acid salt and a cationic polymer with a degree of cationization above a certain level, it has been possible to obtain a good moist feeling on the skin while maintaining the creaminess of the foam. A liquid skin cleanser composition has been proposed that imparts smoothness to the skin during rinsing by blending a cationic polymer such as an acrylamide copolymer (see, for example, Patent Documents 1 and 2).

However, soap-based preparations with a high pH have the problem of coloration progressing over time. Furthermore, the proposed liquid skin cleanser composition also has a problem that the skin feel after cleansing is not sufficiently satisfactory.

Therefore, there has not yet been provided a liquid skin cleanser composition that can suppress coloring even at a high pH, and that can provide good foam performance and a good skin feel after cleansing. At present, there is a strong desire for such development.

JP 2017-214327 A WO2007/145054

An object of the present invention is to solve the above-mentioned conventional problems and to achieve the following objects. That is, it is an object of the present invention to provide a liquid skin cleanser composition that can suppress coloration even at high pH and can provide good foam performance and good skin feel after cleansing. and

（ただし、前記一般式（Ｃ１）中、Ｒ^１は、炭素数３以上の直鎖状若しくは分岐鎖状のヒドロキシアルキル基を表す。）

（ただし、前記一般式（Ｃ２）中、Ｒ^２及びＲ^３はそれぞれ独立して直鎖状若しくは分岐鎖状のヒドロキシアルキル基又はアルキル基を表し、前記Ｒ^２及び前記Ｒ^３の少なくともいずれかはヒドロキシアルキル基である。）

（ただし、前記一般式（Ｃ３）中、Ｒ^４ _、Ｒ^５、及びＲ^６はそれぞれ独立して直鎖状若しくは分岐鎖状のヒドロキシアルキル基又はアルキル基を表し、前記Ｒ^４ _、前記Ｒ^５、及び前記Ｒ^６の少なくともいずれかはヒドロキシアルキル基である。） The present inventors have made intensive studies to achieve the above object, and as a result, (A) an anionic surfactant, (B) a dimethyldiallylammonium chloride polymer, and a dimethyldiallylammonium chloride-acrylic acid copolymer At least one cationic polymer selected from (C) a compound represented by the following general formula (C1), a compound represented by the following general formula (C2), and a compound represented by the following general formula (C3) and at least one compound selected from the compounds described above, and the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of component (B) is 40 mol%. As described above, the mass ratio of the content of the component (A) to the content of the component (C) [(A)/(C)] is set to 300 to 1,000, so that coloring is achieved even at high pH can be suppressed, and further, good foam performance and good skin feel after washing can be obtained.

(However, in the general formula (C1), R ¹ represents a linear or branched hydroxyalkyl group having 3 or more carbon atoms.)

(wherein, in the general formula (C2), R ² and R ³ each independently represent a linear or branched hydroxyalkyl group or an alkyl group, and at least one of R ² and R ³ is It is a hydroxyalkyl group.)

(wherein R ⁴ _, R ⁵ , and R ⁶ each independently represent a linear or branched hydroxyalkyl group or an alkyl group in general formula (C3), and R ⁴ _, R ⁵ , and at least one of said ^R6 is a hydroxyalkyl group.)

（ただし、前記一般式（Ｃ１）中、Ｒ^１は、炭素数３以上の直鎖状若しくは分岐鎖状のヒドロキシアルキル基を表す。）

（ただし、前記一般式（Ｃ２）中、Ｒ^２及びＲ^３はそれぞれ独立して直鎖状若しくは分岐鎖状のヒドロキシアルキル基又はアルキル基を表し、前記Ｒ^２及び前記Ｒ^３の少なくともいずれかはヒドロキシアルキル基である。）

（ただし、前記一般式（Ｃ３）中、Ｒ^４ _、Ｒ^５、及びＲ^６はそれぞれ独立して直鎖状若しくは分岐鎖状のヒドロキシアルキル基又はアルキル基を表し、前記Ｒ^４ _、前記Ｒ^５、及び前記Ｒ^６の少なくともいずれかはヒドロキシアルキル基である。）
を含有し、
前記（Ｂ）成分の塩化ジメチルジアリルアンモニウム－アクリル酸共重合体における塩化ジメチルジアリルアンモニウムに由来する構造単位のモル比率が４０モル％以上であり、
前記（Ｃ）成分の含有量に対する、前記（Ａ）成分の含有量の質量比［（Ａ）／（Ｃ）］が３００～１，０００であることを特徴とする液体皮膚洗浄剤組成物である。
＜２＞ （Ａ）成分が、ラウリン酸塩、ミリスチン酸塩、パルミチン酸塩、及びステアリン酸塩を含む高級脂肪酸塩である前記＜１＞に記載の液体皮膚洗浄剤組成物である。
＜３＞ （Ａ）成分の含有量が、２０質量％～３２質量％であり、（Ｂ）成分の含有量が、０．３質量％～１質量％であり、（Ｃ）成分の含有量が、０．０２質量％～０．０８質量％である前記＜１＞から＜２＞のいずれかに記載の液体皮膚洗浄剤組成物である。 The present invention is based on the findings of the present inventors, and means for solving the above problems are as follows. Namely
<1> (A) an anionic surfactant;
(B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymers and dimethyldiallylammonium chloride-acrylic acid copolymers;
(C) at least one compound selected from compounds represented by the following general formula (C1), compounds represented by the following general formula (C2), and compounds represented by the following general formula (C3);

(However, in the general formula (C1), R ¹ represents a linear or branched hydroxyalkyl group having 3 or more carbon atoms.)

(wherein, in the general formula (C2), R ² and R ³ each independently represent a linear or branched hydroxyalkyl group or an alkyl group, and at least one of R ² and R ³ is It is a hydroxyalkyl group.)

(wherein R ⁴ _, R ⁵ , and R ⁶ each independently represent a linear or branched hydroxyalkyl group or an alkyl group in general formula (C3), and R ⁴ _, R ⁵ , and at least one of said ^R6 is a hydroxyalkyl group.)
contains
The molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is 40 mol% or more,
A liquid skin cleanser composition characterized in that the mass ratio [(A)/(C)] of the content of component (A) to the content of component (C) is 300 to 1,000. be.
<2> The liquid skin cleanser composition according to <1> above, wherein the component (A) is a higher fatty acid salt containing laurate, myristate, palmitate, and stearate.
<3> The content of component (A) is 20% by mass to 32% by mass, the content of component (B) is 0.3% by mass to 1% by mass, and the content of component (C) is 0.02 mass % to 0.08 mass % of the liquid skin cleanser composition according to any one of <1> to <2>.

ADVANTAGE OF THE INVENTION According to this invention, the above-mentioned problems in the past can be solved, the above-mentioned objects can be achieved, coloration can be suppressed even at high pH, and further, good foam performance and good skin feel after washing can be obtained. It is possible to provide a liquid skin cleanser composition that can obtain

(Liquid skin cleanser composition)
The liquid skin cleanser composition of the present invention comprises an anionic surfactant as component (A), a cationic polymer as component (B), and a compound represented by the following general formula (C1) as component (C): A compound represented by the following general formula (C2) and at least one compound selected from a compound represented by the following general formula (C3), and if necessary, further containing other components do.

<(A) anionic surfactant>
The anionic surfactant of component (A) is mainly contained to improve the creaminess of the foam.

The anionic surfactant of component (A) is not particularly limited and can be appropriately selected depending on the intended purpose. surfactants, amino acid surfactants, acyl taurine surfactants, sulfosuccinate surfactants, alkyl phosphate surfactants, olefin sulfonates and the like. These may be used individually by 1 type, and may use 2 or more types together. Among these, higher fatty acid salts, polyoxyethylene alkyl ether sulfates, ethercarboxylic acid-based surfactants, and amino acid-based surfactants are preferred, and higher fatty acid salts are more preferred, from the viewpoint of foam creaminess.

-Higher Fatty Acid Salt-
The higher fatty acid salt in the component (A) is not particularly limited and can be appropriately selected depending on the purpose. Examples include laurate, myristate, palmitate, stearate, etc. mentioned. These may be used individually by 1 type, and may use 2 or more types together. Among these, higher fatty acid salts containing all of laurate, myristate, palmitate and stearate are preferred from the viewpoint of foam creaminess.

The counter ion of the higher fatty acid salt is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include alkali metal ions, ammonium ions, basic amino acids and the like.
The alkali metal ion is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include sodium ion and potassium ion.
The basic amino acid is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include lysine and arginine.
Among these, potassium ion is preferable from the point of creaminess of foam.

As the higher fatty acid salt, an appropriately synthesized one may be used, or a commercially available product may be used.
The higher fatty acid salt can be blended as a higher fatty acid salt, but the higher fatty acid and a salt such as potassium hydroxide are separately added to a blending tank and neutralized to react with the higher fatty acid. It can be used as salt.

The content of the laurate is not particularly limited and can be appropriately selected according to the intended purpose. 3% by mass to 12% by mass, more preferably 7% by mass to 10% by mass, relative to the total amount of the product. When the content is 3% by mass or more, the creaminess of the foam is good, and when it is 12% by mass or less, the moist feeling of the skin after drying with a towel is good.

The content of the myristate salt is not particularly limited and can be appropriately selected according to the intended purpose. 4% by mass to 14% by mass, more preferably 8% by mass to 14% by mass, based on the total amount of the product. When the content is 4% by mass or more, the creaminess of the foam is good, and when it is 14% by mass or less, the moist feeling of the skin after drying with a towel is good.

The content of the palmitate is not particularly limited and can be appropriately selected according to the intended purpose. It is preferably 1% by mass to 9% by mass, more preferably 3% by mass to 9% by mass, based on the total amount of the product. When the content is 1% by mass or more, the creaminess of the foam is good, and when it is 9% by mass or less, the moist feeling of the skin after drying with a towel is good.

The content of the stearate is not particularly limited and can be appropriately selected depending on the intended purpose. It is preferably 0.1% by mass to 3% by mass, more preferably 0.2% by mass to 1% by mass, relative to the total amount of the substance. When the content is 0.1% by mass or more, the creaminess of the foam is good, and when it is 3% by mass or less, the moist feeling of the skin after drying with a towel is good.

- Polyoxyethylene Alkyl Ether Sulfate -
The polyoxyethylene alkyl ether sulfate in the component (A) is not particularly limited and can be appropriately selected depending on the intended purpose. For example, compounds represented by the following general formula (A1) mentioned. The said polyoxyethylene alkyl ether sulfate may be used individually by 1 type, and may use 2 or more types together.

In general formula (A1), R ⁷ represents an alkyl group, and the number of carbon atoms in the alkyl group portion is preferably 10 to 14.

In the general formula (A1), n represents the average added mole number of ethylene oxide (E.O.), and the average added mole number of the ethylene oxide is preferably 1-5.

In the general formula (A1), X represents an alkali metal or ammonium.
The alkali metal is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include sodium and potassium.

Specific examples of the polyoxyethylene alkyl ether sulfate include polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (2) sodium lauryl ether sulfate (also known as POE (2) sodium laureth sulfate), polyoxyethylene (3) sodium lauryl ether sulfate (also known as POE (3) sodium laureth sulfate), polyoxyethylene (4) sodium lauryl ether sulfate, polyoxyethylene (5) sodium lauryl ether sulfate, polyoxyethylene (3) alkyl (C12 , 13) sodium ether sulfate, polyoxyethylene (2) ammonium lauryl ether sulfate, polyoxyethylene (3) ammonium lauryl ether sulfate, and the like.
In addition, the numerical value in said () represents the average added mole number (n) of ethylene oxide.

As the polyoxyethylene alkyl ether sulfate, an appropriately synthesized one may be used, or a commercially available product may be used.
Examples of commercially available polyoxyethylene alkyl ether sulfates include Texapon (registered trademark) N70 (manufactured by BASF, sodium polyoxyethylene (2) lauryl ether sulfate).

- Ether carboxylic acid-based surfactant -
The ether carboxylic acid-based surfactant in the component (A) is not particularly limited and can be appropriately selected according to the purpose. and the like. The ether carboxylic acid-based surfactants may be used singly or in combination of two or more.

In the general formulas (A2) and (A3), R ⁸ is a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms, or a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms represents a phenyl group substituted with a group, and the number of carbon atoms in the R ⁸ moiety is preferably 10 to 14.

In general formula (A2), R ⁹ may be the same or different and represents an alkylene group having 2 to 4 carbon atoms, preferably 2 carbon atoms.

In the general formula (A2), o represents an average added mole number of 1 to 20 alkylene oxide, and the average added mole number of the alkylene oxide is preferably 1 to 5.

In general formulas (A2) and (A3), ^M1 represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or a basic amino acid.

Specific examples of the ether carboxylic acid surfactant represented by the general formula (A2) or (A3) include polyoxyethylene (3) sodium lauryl ether acetate, polyoxyethylene (4) potassium lauryl ether acetate, lauryl and sodium glycol acetate.
In addition, the numerical value in said () represents the average added mole number (o) of alkylene oxide.

As the ether carboxylic acid-based surfactant, an appropriately synthesized one may be used, or a commercially available product may be used.
Examples of commercially available ether carboxylic acid surfactants include Enagicol EC-30 (manufactured by Lion Specialty Chemicals Co., Ltd., polyoxyethylene lauryl ether sodium acetate), Beaurite LCA-25F (polyoxyethylene lauryl ether sodium acetate), Beaulite LCA-30D (polyoxyethylene lauryl ether sodium acetate), Beaulite LCA-H (polyoxyethylene lauryl ether acetic acid), Beaulite LCA-25NH (Laureth-4 carboxylic acid), Beaulite SHAA ( Sodium lauryl glycol carboxylate), Beaurite LCA (sodium polyoxyethylene lauryl ether acetate) (manufactured by Sanyo Chemical Industries, Ltd.), Kao Akipo RLM-45NV (polyoxyethylene (4.5) sodium lauryl ether acetate), Kao Akipo RLM-100NV (polyoxyethylene (10) sodium lauryl ether acetate) (manufactured by Kao Corporation) and the like.
In addition, the numerical value in said () represents the average added mole number (o) of alkylene oxide.

-Amino acid-based surfactant-
The amino acid-based surfactant in the component (A) is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include compounds represented by the following general formula (A4). . The amino acid-based surfactants may be used singly or in combination of two or more.

In the general formula (A4), R ¹⁰ is substituted with a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms, or a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms. The number of carbon atoms in the R ¹⁰ moiety is preferably 8 to 18.

In general formula (A4), R ¹¹ represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.

In general formula (A4), R ¹² and R ¹³ may be the same or different and represent a hydrogen atom or —(CH ₂ ) _m —COOM ² .

In the general formula (A4), m and n may be the same or different and each represents a number of 0-20.

In general formula (A4), M ¹ and M ² may be the same or different and represent a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or a basic amino acid.

The amino acid structure of the hydrophilic portion of the amino acid-based surfactant is not particularly limited and can be appropriately selected depending on the purpose, but glycine, glutamic acid, and methylalanine are preferred.

Specific examples of the amino acid-based surfactant represented by the general formula (A4) include N-acyl-glycine such as N-cocoyl-glycine potassium (N-coconut fatty acid acylglycine potassium) and salts thereof; N-acyl-N-carboxyethyl-glycine and salts thereof such as sodium myristoyl-N-carboxyethyl-glycinate; sodium N-myristoyl-L-glutamate, potassium N-myristoyl-L-glutamate, N-coconut fatty acid acyl- N-acylglutamic acid and salts thereof such as potassium L-glutamate, sodium N-palm fatty acyl-L-glutamate, sodium N-stearoyl-L-glutamate; and potassium N-lauroyl-N-methyl-β-alanine. .

As the amino acid-based surfactant, an appropriately synthesized one may be used, or a commercially available product may be used.
Commercially available amino acid-based surfactants include, for example, Amylite (registered trademark) GCK-11 (potassium N-coconut fatty acid acylglycine), Amylite (registered trademark) GCK-12K (potassium N-coconut fatty acid acylglycine ), Amylite (registered trademark) GCS-12K (sodium N-coconut acylglycinate), Amylite (registered trademark) GCS-11 (sodium N-cococoate acylglycinate), Amisoft (registered trademark) CS-11 (N -sodium myristoyl-L-glutamate), Amisoft® CS-22 (sodium N-cocoate acyl-L-glutamate), Amisoft® LS-11 (sodium N-lauroyl-L-glutamate), Amisoft (registered trademark) MS-11 (sodium N-myristoyl-L-glutamate), Amisoft (registered trademark) HS-11P (sodium N-stearoyl-L-glutamate), Amisoft (registered trademark) HS-11P (F) ( Sodium N-stearoyl-L-glutamate), Amisoft (registered trademark) HS21 (disodium N-stearoyl-L-glutamate), Amilite (registered trademark) ACS-12 (sodium cocoyl alanine) (manufactured by Ajinomoto Healthy Supply Co., Ltd.) ), Amino Surfact (registered trademark) AMMS-P1 (N-myristoyl-L-sodium glutamate) (manufactured by Asahi Kasei Chemicals Corporation), NIKKOL sarcosinate MN (myristoylmethylaminosodium acetate), NIKKOL alaninate LN-30 (lauroylmethyl- β-alanine sodium) (manufactured by Nikko Chemicals Co., Ltd.), Alanone ACE (coconut fatty acid methylalanine sodium), Alanone AME (myristoylmethyl-β-alanine sodium), Alanone ALE (lauroylmethyl-β-alanine sodium) ( Kawaken Fine Chemicals Co., Ltd.), Enagicol L-30AN (Lauroylmethyl-β-alanine sodium) (Lion Specialty Chemicals Co., Ltd.), Softilt AT-L (Lauroylmethyl-β-alanine sodium) (NOF) Co., Ltd.) and the like.

The content of the anionic surfactant of component (A) is not particularly limited and can be appropriately selected according to the purpose. Therefore, it is preferably 10% by mass to 34% by mass, more preferably 20% by mass to 32% by mass, based on the total amount of the liquid skin cleanser composition. When the content is 10% by mass or more, the creaminess of the foam is good, and when it is 34% by mass or less, the moist feeling of the skin after drying with a towel is good.

<(B) Cationic polymer>
The cationic polymer of component (B) is at least one selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer, and mainly provides moist feeling to the skin after drying with a towel. , and to improve the feeling that the skin sticks to the hands after drying with a towel.

ただし、前記一般式（Ｂ１）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４０モル％以上である。 The dimethyldiallylammonium chloride-acrylic acid copolymer in the component (B) is represented by the following general formula (B1).

However, in said general formula (B1), n and m show the molar ratio (mol%) of each structural unit, n+m=100, and said m is 40 mol% or more.

The molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is such that the moist feeling of the skin after towel-drying and the skin after towel-drying are From the point of feeling sticking to the hand, it is 40 mol% or more, preferably 65 mol% or more, more preferably 95 mol% or more. If the molar ratio is less than 40 mol %, the moist feeling of the skin after drying with a towel and the feeling that the skin sticks to the hands after drying with a towel may be insufficient.
The dimethyldiallylammonium chloride-acrylic acid copolymer may be used alone or in combination of two or more.

The molar ratio of each structural unit in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) can be determined by nuclear magnetic resonance (NMR) measurement under the following measurement conditions.
[Measurement condition]
Solvent: heavy water ( _D2O )
Measuring instrument: JNM-LA300 (300 MHz, manufactured by JEOL Ltd.)

The weight-average molecular weight of the cationic polymer of component (B) is not particularly limited and can be appropriately selected according to the purpose. 10,000 to 1,000,000 is preferable, and 15,000 to 450,000 is more preferable from the point of feeling that it sticks to the body.
The weight-average molecular weight of the cationic polymer of the component (B) is determined, for example, by the SEC-MALLS-RI system (measurement conditions: column: TSKgelα series α-M column 30 cm manufactured by Tosoh Corporation, solvent: sodium nitrate 0.3 M aqueous solution). can be measured in

The viscosity at 25° C. of a solution of the cationic polymer (B) having a solid content of 30% by mass to 44% by mass is preferably 10 mPa·s to 15,000 mPa·s, more preferably 20 mPa·s to 12,000 mPa·s. is more preferred.
The viscosity can be measured, for example, using a Brookfield viscometer LVF (manufactured by Brookfield).

The cationic polymer of component (B) may be appropriately synthesized, or may be a commercially available product. Examples of the commercially available products include the following.
MERQUAT 100 (Component name: dimethyldiallylammonium chloride polymer, Lubrizol Co., Ltd., viscosity at 25 ° C. with a solid content of 39% to 44% by mass: 8,000 mPa s to 12,000 mPa s, weight Average molecular weight: 150,000). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with spindle No. 3 rotors can be used and measurements can be made under the conditions of 6 revolutions/minute.

Marquat 106 (Component name: dimethyldiallylammonium chloride polymer, manufactured by Lubrizol, viscosity at 25° C. with a solid content of 30% to 36% by mass: 20 mPa s to 65 mPa s, weight average molecular weight: 15,000) . The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with spindle No. No. 1 rotor can be used and measured at 60 revolutions/minute.

Marquat 295 (component name: dimethyl diallyl ammonium chloride-acrylic acid copolymer, manufactured by Lubrizol Co., Ltd., viscosity at 25 ° C. with a solid content of 35% 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 (B1), molar ratio of structural units derived from dimethyldiallylammonium chloride is 95 mol%). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with spindle No. 4 rotors can be used and measured at 30 revolutions/minute.

Marquat 280 (component name: dimethyl diallyl ammonium chloride-acrylic acid copolymer, manufactured by Lubrizol Co., Ltd., viscosity at 25 ° C. with a solid content of 39% 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 (B1), molar ratio of structural units derived from dimethyldiallylammonium chloride: 65 mol%). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with spindle No. 4 rotors can be used and measured at 60 revolutions/minute.

Among these, as the cationic polymer of the component (B), Marquat 100, Marquat 106, and Marquat 295 are used in terms of the moist feeling of the skin after towel-drying and the feeling that the skin after towel-drying sticks to the hands. preferable.

The content of the cationic polymer of component (B) is not particularly limited and can be appropriately selected according to the purpose. From the standpoint of feeling that the skin sticks to the hands, it is preferably 0.2% by mass to 3% by mass, more preferably 0.3% by mass to 1% by mass, based on the total amount of the liquid skin cleanser composition. When the content is 0.2% by mass or more, the moist feeling of the skin after towel-drying and the feeling that the skin sticks to the hands after towel-drying are good, and when the content is 3% by mass or less, foam good creaminess.

（ただし、前記一般式（Ｃ１）中、Ｒ^１は、炭素数３以上の直鎖状若しくは分岐鎖状のヒドロキシアルキル基を表す。）

（ただし、前記一般式（Ｃ２）中、Ｒ^２及びＲ^３はそれぞれ独立して直鎖状若しくは分岐鎖状のヒドロキシアルキル基又はアルキル基を表し、前記Ｒ^２及び前記Ｒ^３の少なくともいずれかはヒドロキシアルキル基である。）

（ただし、前記一般式（Ｃ３）中、Ｒ^４ _、Ｒ^５、及びＲ^６はそれぞれ独立して直鎖状若しくは分岐鎖状のヒドロキシアルキル基又はアルキル基を表し、前記Ｒ^４ _、前記Ｒ^５、及び前記Ｒ^６の少なくともいずれかはヒドロキシアルキル基である。） <(C) At least one compound selected from compounds represented by general formula (C1), compounds represented by general formula (C2), and compounds represented by general formula (C3)>
At least one compound selected from the compound represented by the general formula (C1), the compound represented by the general formula (C2), and the compound represented by the general formula (C3) of the component (C) is It is mainly contained to improve the moist feeling of the skin after drying with a towel.

(However, in the general formula (C1), R ¹ represents a linear or branched hydroxyalkyl group having 3 or more carbon atoms.)

(wherein, in the general formula (C2), R ² and R ³ each independently represent a linear or branched hydroxyalkyl group or an alkyl group, and at least one of R ² and R ³ is It is a hydroxyalkyl group.)

(wherein R ⁴ _, R ⁵ , and R ⁶ each independently represent a linear or branched hydroxyalkyl group or an alkyl group in general formula (C3), and R ⁴ _, R ⁵ , and at least one of said ^R6 is a hydroxyalkyl group.)

Among these, as the component (C), the compound represented by the general formula (C1) is preferable from the viewpoint of the moist feeling of the skin after drying with a towel.

Specific examples of at least one compound selected from the compound represented by the general formula (C1), the compound represented by the general formula (C2), and the compound represented by the general formula (C3) include , 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol and other compounds represented by the above general formula (C1); diethanolamine and other compounds represented by the above general formula (C2) compounds represented by; and compounds represented by the general formula (C3) such as triethanolamine and 2-dimethylaminoethanol. These may be used individually by 1 type, and may use 2 or more types together. Among these, 2-amino-2-methyl-1-propanol and 2-amino-2-methyl-1,3-propanediol are preferable from the viewpoint of moist feeling of the skin after drying with a towel.

The compound of component (C) may be appropriately synthesized or may be a commercially available product. Examples of the commercially available products include AMP ULTRA (registered trademark) PC1000 (manufactured by Angus Chemical Company, 2-amino-2-methyl-1-propanol), AMPD ULTRA (registered trademark) PC (manufactured by Angus Chemical Company, 2-amino -2-methyl-1,3-propanediol), diethanolamine (manufactured by Mitsui Chemicals, Inc.), triethanolamine 99 (manufactured by Dow Chemical Co., Ltd., triethanolamine), amino alcohol 2Mabs (manufactured by Nippon Emulsifier Co., Ltd., 2- dimethylaminoethanol) and the like.

The content of the compound of component (C) is not particularly limited and can be appropriately selected according to the purpose. On the other hand, 0.01% by mass to 0.20% by mass is preferable, and 0.02% by mass to 0.08% by mass is more preferable. When the content is within the preferred range, the moist feeling of the skin after drying with a towel is good.

<Mass ratio [(A)/(C)]>
The mass ratio [(A)/(C)] of the content of component (A) to the content of component (C) is 300 to 1,000 in terms of the moist feeling of the skin after towel drying. , preferably 305 to 400, more preferably 320 to 370. When the mass ratio [(A)/(C)] is 300 to 1,000, the moist feeling of the skin after drying with a towel is good. On the other hand, when the mass ratio [(A)/(C)] is less than 300 or more than 1,000, the moist feeling of the skin after drying with a towel is insufficient.

<Other ingredients>
In addition to the components (A), (B), and (C), the liquid skin cleanser composition of the present invention may optionally contain other ingredients as long as the effects of the present invention are not impaired. Ingredients can be blended.
Examples of the other components include purified water, water-soluble polymers other than the component (B), amino alcohols other than the component (C), oils, alcohols such as lower alcohols and higher alcohols, lanolin derivatives, and protein derivatives. , medicines such as vitamins, bactericides, preservatives, viscosity modifiers, pH modifiers, antioxidants, sequestering agents, ultraviolet absorbers, animal and plant extracts or their derivatives, pigments, cooling agents, perfumes, pigments, inorganic powders powders of water-insoluble polymers such as solids, clay minerals, nylon, and polyethylene. These may be used individually by 1 type, and may use 2 or more types together.
As for the other components, those synthesized appropriately may be used, or commercially available products may be used.
The content of the other components relative to the total amount of the liquid skin cleanser composition is not particularly limited, and can be appropriately selected according to the purpose.

Examples of amino alcohols other than the component (C) include monoethanolamine. The content of the monoethanolamine relative to the total amount of the liquid skin cleanser composition is preferably 0.05% by mass or less, more preferably 0.01% by mass or less. When the content of the monoethanolamine exceeds 0.05% by mass, the suppression of coloration of the liquid skin cleanser composition may be insufficient.

-pH-
The pH of the liquid skin cleanser composition at 25° C. is preferably from 9.5 to 11.0, more preferably from 9.8 to 10.6.
The pH can be measured, for example, using a pH meter (HM-30R, manufactured by TOA DKK).

-viscosity-
The viscosity of the liquid skin cleanser composition at 25° C. is not particularly limited and can be appropriately selected depending on the intended purpose. 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, rotation speed 30 rpm, No. 3 rotor was used to measure the viscosity after 1 minute. It can be measured by measuring the viscosity after 1 minute with a No. 4 rotor.

-container-
The liquid skin cleansing composition of the present invention is not particularly limited, and is used by being filled in a usual container.
The container is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include a pump dispenser container, a tube, a foamer container, and a bag-like container. Among these, pump dispenser containers are preferred. Examples of the pump dispenser container include a pump dispenser container manufactured by Yoshino Kogyosho Co., Ltd. having a nozzle diameter (inner diameter) of 3.5 mm and a discharge amount of 3 mL.

-Production method-
The method for producing the liquid skin cleanser composition of the present invention is not particularly limited and can be appropriately selected according to the purpose. , the other components and the purified water (blended as the remaining amount so that the entire liquid skin cleansing composition is 100% by mass) can be mixed.
Specifically, it can be manufactured as follows. It can be produced by dissolving the component (A) in purified water heated to 70° C. to 80° C., cooling to 40° C. or less, and then adding the component (B) and the component (C). .

The liquid skin cleanser composition may be prepared using an apparatus. The device is not particularly limited and can be appropriately selected depending on the intended purpose.
The stirring blade is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include propellers, turbines, and dispersers.

-Applications-
The liquid skin cleanser composition of the present invention can suppress coloration even at high pH, and can provide good foam performance and good skin feel after cleansing. It can be used for hand soap, body soap, cleansing foam, make-up remover and the like, and is particularly suitable for body soap.

EXAMPLES The present invention will be described in more detail below based on Examples and Comparative Examples, but the present invention is not limited to these Examples.

The content of each component described in Examples and Comparative Examples is shown in "% by mass", and all values are converted to pure content. The mass ratio [(A)/(C)] of the content of the component (A) to the content of the component (C) was obtained by rounding off to the first decimal place and described as an integer.

(Examples 1 to 25 and Comparative Examples 1 to 8)
Liquid skin cleansing compositions (hereinafter sometimes referred to as "formulations") having compositions and contents shown in Tables 1 to 6 below were prepared by the following method.
Purified water in an amount of 60% by mass of the total amount of the liquid skin cleanser composition finally obtained is heated to 70° C. to 80° C. to dissolve the anionic surfactant of component (A), and of potassium hydroxide. After cooling to 40°C or less, component (B) or a comparison component of component (B), component (C) or a comparison component of component (C), and a common component perfume are added to prepare a liquid skin cleanser. A composition was prepared. After that, when the pH is less than the predetermined pH, potassium hydroxide, which is a common component, is added to adjust the pH to a predetermined value, and then purified water is added so that the total amount becomes 100% by mass. and liquid skin cleansing compositions of comparative examples were obtained. A propeller was used as the stirring blade, and stirring was performed using a three-one motor (HEIDON BL1200, manufactured by Shinto Kagaku Co., Ltd.). The pH was measured at 25° C. using a pH meter (HM-30R, manufactured by TOA DKK). The obtained liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 8 were stored in a container with a pump dispenser [discharge amount 3 mL, nozzle diameter (inner diameter) 3.5 mm, manufactured by Yoshino Kogyosho Co., Ltd. ] was filled.

The prepared liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 8 were evaluated as follows for "creaminess of foam", "moist feeling of skin after towel drying", and "towel drying". The feeling that the skin sticks to the hands after application” and the “suppression of coloring of the formulation” were evaluated and judged. The results are shown in Tables 1 to 6 below.

<Creamyness of foam>
Ten professional evaluators applied 2 pushes (approximately 6 g) of each of the liquid skin cleansing compositions of Examples 1 to 25 and Comparative Examples 1 to 8 onto a lightly dried nylon towel after being moistened with warm water at 40°C. The creaminess of the foam was observed and evaluated according to the following evaluation criteria. As a result, the average score of the 10 professional evaluators was obtained, and the "creaminess of the foam" was determined from the obtained average score. If the average score is 3.0 or more, the "creaminess of foam" is good.
-Evaluation Criteria for “Creamyness of Foam”-
5 points: Most of the bubbles are fine and very creamy.
4 points: Some of the fine bubbles are mixed with large bubbles, but creamy.
3 points: About half of the large bubbles are mixed in the fine bubbles, and it is slightly creamy.
2 points: More large and coarse bubbles than fine bubbles, not creamy.
1 point: Only large and coarse bubbles are formed, and the product is not creamy at all.

<Moist feeling of the skin after drying with a towel>
Ten professional evaluators applied 2 pushes (approximately 6 g) of each of the liquid skin cleansing compositions of Examples 1 to 25 and Comparative Examples 1 to 8 onto a lightly dried nylon towel after being moistened with warm water at 40°C. After rubbing 5 times to create foam and rubbing the whole body with the nylon towel, the liquid skin cleanser composition was rinsed off with warm water at 40°C, and water droplets were wiped off with the towel. After that, a professional evaluator evaluated the "moist feeling of the skin after drying with a towel" according to the following evaluation criteria. As a result, the average evaluation score of the 10 professional evaluators was obtained, and the "moist feeling of the skin after drying with a towel" was determined from the obtained average evaluation score according to the following criteria. If the evaluation is "○", "⊚", or "⊚", the "moist feeling of the skin after drying with a towel" is good.
-Evaluation criteria for “moist feeling of skin after towel drying”-
5 points: A strong feeling of moistness is felt.
4 points: Moist feeling is felt.
3 points: A slightly moist feeling is felt.
2 points: Doesn't give much moist feeling.
1 point: Absolutely no moist feeling.
- Criteria for “moist feeling of skin after drying with a towel” -
◎◎: Average score is 4.5 or more and less than 5.0 ◎: Average score is 4.0 or more and less than 4.4 ○: Average score is 3.0 or more and less than 3.9 △ : The average evaluation score is 1.6 or more and less than 3.0 × : The average evaluation score is 1.0 or more and less than 1.5

<Feeling of the skin sticking to your hands after drying with a towel>
Ten professional evaluators applied 2 pushes (approximately 6 g) of each of the liquid skin cleansing compositions of Examples 1 to 25 and Comparative Examples 1 to 8 onto a lightly dried nylon towel after being moistened with warm water at 40°C. After rubbing 5 times to create foam and rubbing the whole body with the nylon towel, the liquid skin cleanser composition was rinsed off with warm water at 40°C, and water droplets were wiped off with the towel. After that, a professional evaluator evaluated each "feeling that the skin sticks to the hands after being towel-dried", and judged according to the following criteria. If the judgment is "◯" or "⊚", the "feeling that the skin sticks to the hands after drying with a towel" is good.
- Criteria for “feeling that the skin sticks to the hands after drying with a towel” -
⊚: 8 or more and 10 or less of the professional evaluators felt a sense of attraction.
◯: 5 or more and 7 or less of the professional evaluators felt a strong attraction.
Δ: 3 or more and 4 or less of the professional evaluators feel an attraction.
x: 0 or more and 2 or less of the professional evaluators felt a sticking feeling.

<Suppression of coloration of formulation>
50 mL of each of the liquid skin cleansing compositions of Examples 1 to 25 and Comparative Examples 1 to 8 was placed in a 50 mL glass bottle (screw cap bottle SV-50A, manufactured by Nichiden Rika Glass Co., Ltd.), the lid of the glass bottle was closed, Stored at 50°C for 30 days. Ten professional evaluators evaluated the clarity of appearance of each of the stored liquid skin cleansing compositions, and determined "prevention of coloration of formulation" according to the following criteria. If the judgment is "○", "⊚", or "⊚", "suppression of coloring of formulation" is good.
- Criteria for “suppression of coloration of formulations” -
⊚: Ten professional evaluators felt that the appearance was clear.
⊚: 8 or more and 9 or less of the professional evaluators felt that the appearance was clear.
○: 5 or more and 7 or less of the professional evaluators felt that the appearance was clear.
Δ: 3 or more and 4 or less of the professional evaluators felt that the appearance was clear.
x: 0 or more and 2 or less of the professional evaluators feel that the appearance is clear.

Details of each component used in Examples 1 to 25 and Comparative Examples 1 to 8 are shown in Table 7 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（旭硝子株式会社製、液体苛性カリ）で中和させて調製したものを使用した。
※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（旭硝子株式会社製、液体苛性カリ）で中和させて調製したものを使用した。
※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（旭硝子株式会社製、液体苛性カリ）で中和させて調製したものを使用した。
※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（旭硝子株式会社製、液体苛性カリ）で中和させて調製したものを使用した。

*1: Potassium laurate was prepared by neutralizing lauric acid (NAA-122, manufactured by NOF Corporation) with potassium hydroxide (manufactured by Asahi Glass Co., Ltd., liquid caustic potash).
*2: Potassium myristate was prepared by neutralizing myristic acid (NAA-142, manufactured by NOF Corporation) with potassium hydroxide (manufactured by Asahi Glass Co., Ltd., liquid caustic potash).
*3: Potassium palmitate was prepared by neutralizing palmitic acid (NAA-160, manufactured by NOF Corporation) with potassium hydroxide (manufactured by Asahi Glass Co., Ltd., liquid caustic potash).
*4: Potassium stearate was prepared by neutralizing stearic acid (NAA-180, NOF Corp.) with potassium hydroxide (liquid caustic potash, Asahi Glass Corp.).

The liquid skin cleanser composition of the present invention can suppress coloration even at high pH, and can provide good foam performance and good skin feel after cleansing. It can be used for hand soap, body soap, cleansing foam, make-up remover and the like, and is particularly suitable for body soap.

Claims (3)

(A) an anionic surfactant;
(B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymers and dimethyldiallylammonium chloride-acrylic acid copolymers;
(C) at least one compound selected from compounds represented by the following general formula (C1), compounds represented by the following general formula (C2), and compounds represented by the following general formula (C3) and,

(However, in the general formula (C1), R ¹ represents a linear or branched hydroxyalkyl group having 3 or more carbon atoms.)

(wherein, in the general formula (C2), R ² and R ³ each independently represent a linear or branched hydroxyalkyl group or an alkyl group, and at least one of R ² and R ³ is It is a hydroxyalkyl group.)

(wherein R ⁴ _, R ⁵ , and R ⁶ each independently represent a linear or branched hydroxyalkyl group or an alkyl group in general formula (C3), and R ⁴ _, R ⁵ , and at least one of said ^R6 is a hydroxyalkyl group.)
contains
The component (A) is one or more selected from the group consisting of laurate, myristate, palmitate, and stearate,
The molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is 40 mol% or more,
Component (C) is at least one selected from the group consisting of 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, diethanolamine, and 2-dimethylaminoethanol and
The content of the component (A) is 10% by mass to 34% by mass,
The content of the component (B) is 0.2% by mass to 3% by mass,
The content of the component (C) is 0.01% by mass to 0.20% by mass,
A liquid skin cleanser composition, wherein the mass ratio [(A)/(C)] of the content of component (A) to the content of component (C) is 300 to 1,000. 2. The liquid skin cleanser composition according to claim 1, wherein component (A) is a higher fatty acid salt containing laurate, myristate, palmitate and stearate. The content of component (A) is 20% by mass to 32% by mass, the content of component (B) is 0.3% by mass to 1% by mass, and the content of component (C) is 0% by mass. 3. The liquid skin cleanser composition according to any one of claims 1 and 2, wherein the content is 0.02% by mass to 0.08% by mass.