JP2022191760A - Liquid skin cleanser composition - Google Patents

Abstract

To provide a liquid skin cleanser composition that retains foam well, does not cause a tight feeling in skin after towel drying, secures smooth skin during rinsing and resilient skin after towel drying, and also has high stability at low temperature.SOLUTION: Provided is a liquid skin cleanser composition comprising (A) an anionic surfactant comprising at least one component selected from (a1) a palmitate and (a2) a stearate, (B) at least one cationic polymer selected from a dimethyldiallyl ammonium chloride polymer and a dimethyldiallyl ammonium chloride-acrylic acid copolymer, and (C) polyethylene glycol having an average molecular weight of 190 to 630, the liquid skin cleanser composition having the [(A)/(C)] mass ratio of 15 to 100 and being packed in a foamer container.SELECTED DRAWING: None

Description

The present invention relates to liquid skin cleanser compositions.

Conventionally, liquid skin cleansing compositions such as hand soaps and body soaps are required to have good foam performance such as foam retention, to impart smoothness to the skin during rinsing, and to soften the skin after drying with a towel. It is desired that the skin feels good in use, such as imparting elasticity and not giving a tight feeling to the skin after drying with a towel. However, while the majority of consumers wash with cleaning tools such as nylon towels and cotton towels, the body soap that comes out in foam, which is in increasing demand in recent years, is used with cleaning tools. , there is a problem that the compatibility between foam retention and low-temperature stability is not satisfactory.

Liquid skin cleansing compositions containing, for example, a fatty acid salt and a cationic polymer having a structural unit derived from dimethyldiallylammonium chloride have been proposed in order to provide a good feel during use (for example, Patent Document 1 , 2, etc.). However, the liquid skin cleanser composition proposed above is not satisfactory in terms of foam retention when lathered with a cleansing tool such as a nylon towel or cotton towel, skin elasticity after drying with a towel, and low-temperature stability. There was a problem.

In addition, in order to improve the foam retention of liquid skin cleansing compositions, liquid skin cleansing compositions containing nonionic surfactants such as polyoxyethylene alkyl ethers and fatty acid monoethanolamides have been proposed ( For example, see Patent Document 3). However, the proposed liquid skin cleansing composition has a problem that the skin elasticity and low-temperature stability after drying with a towel are not satisfactory.

In order to improve the foam retention of the liquid skin cleanser composition, it is generally known to add a large amount of long-chain fatty acids such as palmitic acid and stearic acid. When the ratio of long-chain fatty acids is increased, there are problems such as precipitation of fatty acids at low temperatures, making it impossible to maintain a transparent appearance, and reducing skin elasticity after drying with a towel.

Therefore, it has excellent foam retention when lathered with a cleansing tool such as a nylon towel or cotton towel, does not give a tight feeling to the skin after drying with a towel, smoothes the skin during rinsing, and improves the elasticity of the skin after drying with a towel. It is strongly desired to provide a liquid skin cleanser composition filled in a foamer container that has a good cleansing property, prevents the precipitation of fatty acids even under low temperature conditions, and maintains a transparent appearance. is.

Japanese Patent Application Laid-Open No. 2004-262838 JP 2014-208633 A International Publication No. 2019/97950

An object of the present invention is to solve the above-mentioned conventional problems and to achieve the following objects. That is, the present invention provides a liquid that has excellent foam retention, does not give a tight feeling to the skin after towel-drying, provides good skin smoothness during rinsing and good skin elasticity after towel-drying, and is excellent in low-temperature stability. An object of the present invention is to provide a skin cleanser composition.

As a result of intensive studies, the present inventors have found that (A) an anionic surfactant containing at least one selected from (a1) palmitate and (a2) stearate, and (B) dimethyl chloride diallyl ammonium polymer and at least one cationic polymer selected from dimethyl diallyl ammonium chloride-acrylic acid copolymer; and (C) polyethylene glycol having an average molecular weight of 190 to 630, ) is 10% by mass to 25% by mass, and the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of component (B) is 40 mol%. The mass ratio [(A)/(C)] of the content of the component (A) to the content of the component (C) is 15 to 100, and is filled in a former container. The liquid skin cleanser composition has excellent foam retention, does not give a tight feeling to the skin after towel-drying, has good skin smoothness during rinsing and good skin elasticity after towel-drying, and has low temperature stability. I found it to be excellent.

ただし、前記一般式（１）中、ｎ、ｍ、及びｚは各構造単位のモル比（モル％）を示し、ｎ＋ｍ＋ｚ＝１００であり、前記ｎは０～３４、前記ｍは２４～３１、前記ｚは３５～７６である。
＜３＞ 前記（Ａ）成分の含有量に対する前記（ａ１）パルミチン酸塩と前記（ａ２）ステアリン酸塩との合計含有量の質量比［（（ａ１）＋（ａ２））／（Ａ）］が、０．１～０．５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。
＜４＞ 前記（Ｂ）成分の含有量が、０．２質量％～０．８質量％であり、
前記（Ｃ）成分の含有量が、０．２質量％～０．８質量％であり、
前記（Ｄ）成分の含有量が、０．０５質量％～０．３質量％
である前記＜１＞から＜３＞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 containing at least one selected from (a1) palmitate and (a2) stearate;
(B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymers and dimethyldiallylammonium chloride-acrylic acid copolymers;
(C) polyethylene glycol having an average molecular weight of 190 to 630;
contains
The content of the component (A) is 10% by mass to 25% by mass,
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,
The mass ratio of the content of the component (A) to the content of the component (C) [(A)/(C)] is 15 to 100,
The liquid skin cleanser composition is filled in a foamer container.
<2> The liquid skin cleanser composition according to <1>, further comprising (D) a copolymer represented by the following general formula (1).

However, in the general formula (1), n, m, and z represent the molar ratio (mol%) of each structural unit, n + m + z = 100, the n is 0 to 34, the m is 24 to 31, The z is 35-76.
<3> Mass ratio of the total content of the (a1) palmitate and the (a2) stearate to the content of the component (A) [((a1) + (a2))/(A)] is 0.1 to 0.5.
<4> The content of the component (B) is 0.2% by mass to 0.8% by mass,
The content of the component (C) is 0.2% by mass to 0.8% by mass,
The content of the component (D) is 0.05% by mass to 0.3% by mass
The liquid skin cleanser composition according to any one of <1> to <3> above.

ADVANTAGE OF THE INVENTION According to this invention, the above-mentioned problems in the past can be solved and the above-mentioned objects can be achieved. It is possible to provide a liquid skin cleanser composition that gives good elasticity to the skin after application and is excellent in low-temperature stability.

(Liquid skin cleanser composition)
The liquid skin cleanser composition of the present invention contains (A) an anionic surfactant, (B) a cationic polymer, (C) polyethylene glycol, and further contains (D) a copolymer. is preferable, and further contains other components as necessary.

<(A) anionic surfactant>
The anionic surfactant as the component (A) is mainly contained to improve foam retention.
In this specification, the term "foam retention" means that the foam is maintained without disappearing when the cleaning tool is used. The cleaning tool is not particularly limited as long as it is used for cleaning the skin, and can be appropriately selected according to the purpose. Examples thereof include nylon towels and cotton towels.

The anionic surfactant of component (A) includes (a1) palmitate (hereinafter sometimes referred to as "(a1) component") and (a2) stearate (hereinafter referred to as "(a2) component"). may be referred to as) contains at least one selected from.
The anionic surfactant of the component (A) is not particularly limited as long as it contains at least one selected from the (a1) palmitate and the (a2) stearate. Examples include salts of higher fatty acids other than the components (a1) and (a2), polyoxyethylene (POE) alkyl ether sulfates, ether carboxylates, and amino acid-based surfactants. . These may be used individually by 1 type, and may use 2 or more types together. Among these, higher fatty acid salts and POE alkyl ether sulfates are preferred, and higher fatty acid salts are more preferred.

-Higher Fatty Acid Salt-
The higher fatty acid salt in the component (A) is not particularly limited as long as it contains at least one selected from the (a1) palmitate and the (a2) stearate, depending on the purpose. Examples thereof include laurate and myristate. 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 palmitate, stearate, laurate, and myristate are preferred from the viewpoint of foam retention and skin elasticity after towel-drying.

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 salts, amine salts and amino acid salts.
The alkali metal salt is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include sodium salt and potassium salt.
The amine salt is not particularly limited and can be appropriately selected depending on the purpose. Examples include ammonium salt; monoethanolamine salt, diethanolamine salt, triethanolamine salt, and alkanolamine salts such as -amino-2-methylpropanediol.
The amino acid salt is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include lysine salts and arginine salts.
Among these, alkali metal salts are preferred, and potassium salts are particularly preferred.

As the higher fatty acid salt, an appropriately synthesized one may be used, or a commercially available product may be used.
Commercially available higher fatty acid salts include, for example, trade names of Nonsal PK-1 (potassium palmitate, manufactured by NOF Corporation), Nonsal SK-1 (potassium stearate, manufactured by NOF Corporation), and NIKKOL Laurin. Acid potassium LK-120 (potassium laurate, manufactured by Nikko Chemicals Co., Ltd.), NIKKOL potassium myristate MK-140 (potassium myristate, manufactured by Nikko Chemicals Co., Ltd.), Thai soap MNK-40 (potassium coconut oil fatty acid, potassium myristate combination liquid, manufactured by Nikko Chemicals Co., Ltd.) and the like.

The higher fatty acid salt can be blended as a higher fatty acid salt, but the higher fatty acid and the counterion salt such as potassium hydroxide are separately added to a blending tank and neutralized. may be used as a higher fatty acid salt.

The higher fatty acid used for preparing the higher fatty acid salt may be appropriately synthesized or a commercially available product.
Examples of commercially available higher fatty acids include NAA (registered trademark)-160 (palmitic acid, manufactured by NOF Corporation) and NAA (registered trademark)-180 (stearic acid, manufactured by NOF Corporation). , NAA (registered trademark)-122 (lauric acid, manufactured by NOF Corporation), NAA (registered trademark)-142 (myristic acid, manufactured by NOF Corporation), and the like.

The content of the (a1) palmitate is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 1% by mass to 10% by mass relative to the total amount of the liquid skin cleanser composition. , 3% by mass to 9% by mass.

The content of the (a2) stearate is not particularly limited and can be appropriately selected depending on the intended purpose. is preferred, and 0.2% by mass to 1% by mass is more preferred.

The content of the laurate is not particularly limited and can be appropriately selected depending on the intended purpose. % to 10% by mass is more preferable.

The content of the myristate salt is not particularly limited and can be appropriately selected depending on the intended purpose. % to 14% by mass is more preferred.

- 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 ¹ represents an alkyl group, and the alkyl group portion preferably has 10 to 14 carbon atoms.

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 addition mole number (n) of ethylene oxide (E.O.).

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, polyoxyethylene (2) sodium lauryl ether sulfate) and Shinoline SPE-1250. (manufactured by New Japan Chemical Co., Ltd., polyoxyethylene (2) sodium lauryl ether sulfate) and the like.

- Ether carboxylate -
The ether carboxylate in the component (A) is not particularly limited and can be appropriately selected depending on the intended purpose. is mentioned. The ether carboxylates may be used singly or in combination of two or more.

In the general formulas (A2) and (A3), R ² is a linear or branched alkyl group or alkenyl group having 5 to 23 carbon atoms, or a linear or branched alkyl group or alkenyl group having 5 to 23 carbon atoms The number of carbon atoms in the R ² moiety representing a phenyl group substituted with a group is preferably 10 to 14.

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

The ether carboxylate may be appropriately synthesized or may be a commercially available product.
Commercially available products of the ether carboxylate include, for example, trade names Enagicol EC-30 (manufactured by Lion Specialty Chemicals Co., Ltd., polyoxyethylene (3) sodium lauryl ether acetate), Beaulite LCA-25F (poly Oxyethylene (3) Sodium Lauryl Ether Acetate), Beaulite LCA-30D (Polyoxyethylene (3) Sodium Lauryl Ether Acetate), Beaulite LCA-H (Polyoxyethylene (4) Lauryl Ether Acetate), Beaulite LCA- 25NH (laureth-4 carboxylic acid), Beaulite SHAA (sodium lauryl glycol carboxylate), Beaulite LCA (polyoxyethylene (3) sodium lauryl ether acetate) (manufactured by Sanyo Chemical Industries, Ltd.), Kao Akipo RLM-45NV (polyoxyethylene (4.5) sodium lauryl ether acetate), Kaohakipo 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 ⁴ 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. indicates a phenyl group. The number of carbon atoms in the R ⁴ moiety is preferably 8-18.

In general formula (A4), R ⁵ represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.

In general formula (A4), R ⁶ and R ⁷ 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 such as sodium myristoyl-N-carboxyethyl-glycine and salts thereof; sodium N-myristoyl-L-glutamate, potassium N-myristoyl-L-glutamate, N-coconut fatty acid acyl- Potassium L-glutamate, sodium N-palm fatty acid acyl-L-glutamate, N-acylglutamic acid and its salts such as sodium N-stearoyl-L-glutamate; N-lauroyl-N-methyl-β-alanine potassium, etc. .

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, trade names of Amylite (registered trademark) GCK-11 (potassium N-coconut oil fatty acid acylglycine) and Amylite (registered trademark) GCK-12K (N-coconut oil Potassium fatty acid acylglycinate), Amylite (registered trademark) GCS-12K (sodium N-coconut acylglycinate), Amylite (registered trademark) GCS-11 (sodium N-coconut acylglycinate), Amisoft (registered trademark) CS -11 (N-myristoyl-L-sodium glutamate), Amisoft (registered trademark) CS-22 (N-coconut fatty acid acyl-L-glutamate sodium), Amisoft (registered trademark) LS-11 (N-lauroyl-L- sodium glutamate), Amisoft® MS-11 (N-myristoyl-L-sodium glutamate), Amisoft® HS-11P (N-stearoyl-L-sodium glutamate), Amisoft® HS-11P (F) (N-stearoyl-L-glutamate sodium), Amisoft (registered trademark) HS21 (N-stearoyl-L-glutamate disodium), Amilite (registered trademark) ACS-12 (cocoyl alanine sodium) (above, Ajinomoto Healthy Supply Co., Ltd.), Amino Surfact (registered trademark) AMMS-P1 (sodium N-myristoyl-L-glutamate) (manufactured by Asahi Kasei Chemicals Corp.), NIKKOL Sarcosinate MN (sodium myristoylmethylaminoacetate), 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) (manufactured by Kawaken Fine Chemicals Co., Ltd.), Enagicol L-30AN (lauroylmethyl-β-alanine sodium) (manufactured by Lion Specialty Chemicals Co., Ltd.), Softilt AT-L (lauroylmethyl-β-alanine sodium) ) (manufactured by NOF Corporation).

The content of the anionic surfactant as component (A) is 10% by mass or more, based on the total amount of the liquid skin cleanser composition, from the viewpoints of foam retention, skin elasticity after towel-drying, and low-temperature stability. 25% by weight, preferably 12% to 20% by weight. If the content of the component (A) is less than 10% by mass, the foam retention is insufficient, and if it exceeds 25% by mass, the elasticity of the skin after drying with a towel and the feeling of stability at low temperature are insufficient.

Further, the mass ratio of the total content of the (a1) palmitate and the (a2) stearate to the content of the component (A) [((a1) + (a2)) / (A)] is not particularly limited and can be appropriately selected according to the intended purpose. 15 to 0.3 is more preferred. When the [((a1) + (a2)) / (A)] is 0.1 or more, the foam retention is good, and when it is 0.5 or less, the elasticity of the skin after towel drying and low temperature Good stability.

<(B) Cationic polymer>
The cationic polymer as the component (B) is at least one selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer, and is mainly used to improve skin elasticity after towel drying. and is included to improve skin smoothness upon rinsing.

ただし、前記一般式（Ｂ１）中、ｎ、及びｍは、各構造単位のモル比（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 65 mol% or more from the viewpoint of elasticity of the skin after drying with a towel. Preferably, 96 mol % or more is more preferable.
The dimethyldiallylammonium chloride-acrylic acid copolymer may be used alone or in combination of two or more.

The molar ratio of the structural units 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 may be appropriately selected depending on the intended purpose. ,000 is more preferred.
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 commercially available cationic polymers of component (B) include the following under trade names.

MERQUAT 100 (component name: dimethyldiallylammonium chloride polymer, manufactured by Nippon 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: dimethyl diallyl ammonium chloride polymer, manufactured by Nippon Lubrizol Co., Ltd., 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 280 (Component name: dimethyl diallyl ammonium chloride-acrylic acid copolymer, manufactured by Lubrizol Japan 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 (1), molar ratio of structural units derived from dimethyldiallylammonium chloride is 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.

Marquat 295 (Component name: dimethyl diallyl ammonium chloride-acrylic acid copolymer, manufactured by Lubrizol Japan 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 (1), 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.

Among these, Merquat 100, Merquat 280, and Marquat 295 are preferable as the cationic polymer of component (B) from the standpoint of skin elasticity after drying with a towel.

The content of the cationic polymer of component (B) is not particularly limited and can be appropriately selected according to the purpose. , the content is preferably 0.1% by mass to 1% by mass, more preferably 0.2% by mass to 0.8% by mass, relative to the total amount of the liquid skin cleanser composition. When the content of component (B) is 0.1% by mass or more, the elasticity of the skin after towel-drying is good, and when it is 1% by mass or less, the skin feels tight after towel-drying. good.

<(C) polyethylene glycol>
Polyethylene glycol as component (C) is polyethylene glycol having an average molecular weight of 190 to 630, and is mainly contained to improve skin elasticity and low-temperature stability after towel-drying.

If the average molecular weight of the component (C) exceeds 630, the elasticity of the skin after drying with a towel is reduced. There is no commercially available polyethylene glycol having an average molecular weight of less than 190.
The average molecular weight can be measured by the average molecular weight test described in Standards for Quasi-drug Ingredients 2006.

Examples of the polyethylene glycol of component (C) include polyethylene glycol 200 (average molecular weight 190 to 210), polyethylene glycol 300 (average molecular weight 280 to 320), polyethylene glycol 400 (average molecular weight 380 to 420), polyethylene glycol 600 ( average molecular weight 570-630), and the like. These may be used individually by 1 type, and may use 2 or more types together. Among these, polyethylene glycol 400 (average molecular weight: 380 to 420) is preferable as the component (C) in terms of elasticity of the skin after drying with a towel and stability at low temperatures.
Depending on the product, for example, polyethylene glycol 200 may have a # between the polyethylene glycol and the numerical value, such as polyethylene glycol #200.

The content of polyethylene glycol as component (C) is not particularly limited and can be appropriately selected according to the purpose. It is preferably 0.1% by mass to 1.0% by mass, more preferably 0.2% by mass to 0.8% by mass, relative to the total amount of the composition. When the content of component (C) is 0.1% by mass or more, the elasticity and low-temperature stability of the skin after drying with a towel are good, and when it is 1.0% by mass or less, low-temperature stability is good. Good.

<Mass ratio [(A)/(C)]>
The mass ratio [(A)/(C)] of the content of component (A) to the content of component (C) is determined from the viewpoint of foam retention, skin elasticity after towel drying, and low temperature stability. , 15-100, preferably 20-40. If the mass ratio [(A)/(C)] is less than 15, the foam retention is insufficient, and if it exceeds 100, the elasticity and low-temperature stability of the skin after drying with a towel are insufficient.

<(D) a copolymer represented by the following general formula (1)>
The copolymer of component (D) is preferably contained in order to improve the smoothness of the skin during rinsing.

ただし、前記一般式（１）中、ｎ、ｍ、及びｚは各構造単位のモル比（モル％）を示し、ｎ＋ｍ＋ｚ＝１００である。
前記ｎは０～３４が好ましく、前記ｍは２４～３１が好ましく、前記ｚは３５～７６が好ましい。
これらの中でも、すすぎ時の肌の滑らかさの点から、前記一般式（１）におけるｎ：ｍ：ｚ＝０：２４：７６が好ましい。 The copolymer of component (D) is a copolymer represented by the following general formula (1).

However, in said general formula (1), n, m, and z show the molar ratio (mol%) of each structural unit, and it is n+m+z=100.
The n is preferably 0 to 34, the m is preferably 24 to 31, and the z is preferably 35 to 76.
Among these, n:m:z=0:24:76 in the general formula (1) is preferable from the point of smoothness of the skin during rinsing.

The molar ratio of each structural unit in the copolymer of component (D) 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 copolymer of component (D) is not particularly limited and may be appropriately selected depending on the intended purpose. , 600,000 is more preferred. The weight-average molecular weight of the copolymer of component (D) is determined, for example, by the SEC-MALLS-RI system (measurement conditions: column: TSKgel α 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 the copolymer solution having a solid content of 8% by mass to 45% by mass in the copolymer of component (D) is not particularly limited, and can be appropriately selected depending on the purpose. , 1,500 mPa·s to 16,000 mPa·s.
The viscosity can be measured, for example, using a Brookfield viscometer LVF (manufactured by Brookfield).

As the copolymer of component (D), an appropriately synthesized one may be used, or a commercially available product may be used. Examples of the commercially available products include the following.

Marquat 550PR (component name: dimethylallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol, solid content 8.8% to 9.8% by mass at 25 ° C. viscosity: 7,500 mPa s to 15,000 mPa s, weight average molecular weight: 1,600,000, n:m:z=0:30:70 in the general formula (1). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with spindle No. 4 rotors can be used and measurement can be made under the condition of 10 revolutions/minute.

Marquat 740 (component name: dimethylallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Co., Ltd., viscosity at 25 ° C. with a solid content of 41% to 45% by mass: 2,000 mPa s to 12,000 mPa s, weight Average molecular weight: 120,000, n:m:z=0:24:76 in the general formula (1). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with spindle No. 4 rotors can be used and measurement can be made under the condition of 10 revolutions/minute.

Marquat 3330PR (component name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Co., Ltd., viscosity at 25 ° C. with a solid content of 10.2% to 11.5% by mass: 1,000 mPa s ~ 6,000 mPa·s, weight average molecular weight: 1,500,000, n:m:z=34:31:35 in the general formula (1). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with spindle No. 4 rotors and 30 rotations/minute.

Marquat 3331PR (component name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Co., Ltd., viscosity at 25 ° C. with a solid content of 9.7% to 10.7% by mass: 2,000 mPa s ~ 12,000 mPa·s, weight average molecular weight: 1,600,000, n:m:z=22.5:26.5:51 in the general formula (1). The viscosity is determined using a Brookfield viscometer LVF (manufactured by Brookfield).
Spindle no. No. 5 rotors can be used and measurements can be made under conditions of 30 revolutions/minute.

Marquat 3940 (component name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Co., Ltd., viscosity at 25 ° C. with a solid content of 41% to 45% by mass: 1,500 mPa s to 4,500 mPa s s, weight average molecular weight: 150,000, n:m:z=31:29:40 in the general formula (1). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with spindle No. 3 rotors are used, and the measurement can be performed under the condition of 10 revolutions/minute.

Among these, Marquat 740 is preferable as the copolymer of component (D) from the viewpoint of smoothness of the skin during rinsing.

The content of the copolymer of component (D) is 0.01 based on the total amount of the liquid skin cleanser composition, from the viewpoint of the smoothness of the skin during rinsing and the firmness of the skin after drying with a towel. % by mass to 0.5% by mass is preferable, and 0.05% by mass to 0.3% by mass is more preferable. When the content of component (D) is 0.01% by mass or more, smoothness of the skin during rinsing is good, and when it is 0.5% by mass or less, the skin feels tight after drying with a towel. is good.

<Other ingredients>
In the liquid skin cleanser composition, in addition to the components (A), (B), (C), and (D), it is necessary to the extent that the effects of the present invention are not impaired. Other ingredients can be added depending on the requirements.
Examples of the other components include surfactants other than the component (A), water-soluble polymers other than the components (B) and (D), oils, silicones, alcohols, lanolin derivatives, and proteins. Derivatives, drugs (e.g., vitamins, etc.), moisturizers, bactericides, preservatives, pH adjusters, antioxidants, sequestering agents, UV absorbers/scatterers, animal and plant extracts or their derivatives, chelating agents, UV absorbers - Scattering agents, amino acids, dyes, fragrances, pigments, inorganic powders, clay minerals, water-insoluble polymer compound powders, and the like. These may be used individually by 1 type, and may use 2 or more types together.

Examples of the oil include vegetable oils and fats such as castor oil, olive oil, cacao oil, hardened palm oil, camellia oil, coconut oil, Japan wax, jojoba oil, grapeseed oil, avocado oil, and ester compounds thereof; mink oil, Animal oils and fats such as egg yolk oil; Waxes such as beeswax, whale wax, lanolin, hydrogenated lanolin, carnauba wax, and candelilla wax; Hydrocarbons such as liquid paraffin, squalane, microcrystalline wax, ceresin wax, paraffin wax, and petrolatum natural and synthetic fatty acids such as oleic acid, isostearic acid, behenic acid; glycerol tri-2-ethylhexanoate, 2-ethylhexyl stearate, butyl stearate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, and esters such as octyldodecyl oleate and cholesterol oleate. These may be used individually by 1 type, and may use 2 or more types together.
The content of the oil is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected according to the purpose. % to 3% by mass is preferred.

Examples of alcohols include lower and higher alcohols, and specific examples thereof include natural and synthetic higher alcohols such as cetyl alcohol, oleyl alcohol, stearyl alcohol, hexyldecanol, octyldodecanol, and lauryl alcohol. mentioned. These may be used individually by 1 type, and may use 2 or more types together.
The content of the alcohol is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected according to the purpose. % to 3% by mass is preferred.

Examples of the moisturizing agent include isoprene glycol, 1,2-pentanediol, diethylene glycol, diethylene glycol monoalkyl ether, polypropylene glycol, polypropylene glycol, hydrogenated castor oil (30 E.O.), diglycerin, triglycerin, polyglycerin, and the like. is mentioned. These may be used individually by 1 type, and may use 2 or more types together.
The content of the alcohol is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected according to the purpose. % to 10% by mass is preferred.

Examples of the preservative include benzoate, sorbate, dehydroacetate, paraoxybenzoic acid ester, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, 3,4,4'-trichlorocarbaniate. Lid, benzalkonium chloride, hinokitiol, resorcinol, methylchloroisothiazolinone/methylisothiazolinone liquid (trade name: Kason CG, manufactured by Rohm and Haas Japan), salicylic acid, pentanediol, phenoxyethanol, ethanol, etc. mentioned. These may be used individually by 1 type, and may use 2 or more types together.
The content of the antiseptic is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected according to the purpose. % to 1% by weight is preferred.

Examples of the antioxidant include dibutylhydroxytoluene, butylhydroxyanisole, and ascorbic acid. These may be used individually by 1 type, and may use 2 or more types together.
The content of the antioxidant is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected according to the purpose. 1% by mass to 1% by mass is preferred.

Examples of the chelating agent include disodium edetate, ethylenediaminetetraacetate, hexametaphosphate, and gluconic acid. These may be used individually by 1 type, and may use 2 or more types together.
The content of the chelating agent is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected according to the purpose. % to 1% by weight is preferred.

Examples of the pH adjuster include sodium hydroxide, potassium hydroxide, citric acid, hydrochloric acid, succinic acid, triethanolamine, aqueous ammonia, triisopropanolamine, phosphoric acid, and glycolic acid. These may be used individually by 1 type, and may use 2 or more types together.

Examples of the ultraviolet absorbing/scattering agent include 2-hydroxy-4-methoxybenzophenone, octyldimethyl para-aminobenzoate, ethylhexyl para-methoxycinamate, titanium oxide, kaolin, and talc. These may be used individually by 1 type, and may use 2 or more types together.

Examples of the vitamins include vitamin A, vitamin B group, vitamin C, vitamin D, vitamin E, vitamin F, vitamin K, vitamin P, vitamin U, carnitine, ferulic acid, γ-oryzanol, α-lipoic acid, orotic acid and derivatives thereof; These may be used individually by 1 type, and may use 2 or more types together.
The content of the vitamins is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected according to the purpose. % by mass to 0.5% by mass is preferred.

Examples of the amino acids include glycine, alanine, valine, leucine, isoleucine, phenylalanine, tryptophan, cystine, cysteine, methionine, proline, hydroxyproline, aspartic acid, glutamic acid, arginine, histidine, lysine and derivatives thereof. . These may be used individually by 1 type, and may use 2 or more types together.
The content of the amino acids is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected according to the purpose. % by mass to 0.5% by mass is preferred.

Examples of the water-insoluble polymer compound powder include nylon and polyethylene. These may be used individually by 1 type, and may use 2 or more types together.

-pH-
The pH of the liquid skin cleanser composition at 25° C. is not particularly limited and may be appropriately selected depending on the intended purpose. more preferred.
The pH can be measured, for example, using a glass electrode color hydrogen ion concentration indicator HM-30R (Electrode type GST-5721 manufactured by Toa DKK Co., Ltd.).

-viscosity-
The viscosity of the liquid skin cleanser composition at 25° C. is not particularly limited and can be appropriately selected according to the container to be used. • s is more preferred.
For example, when using a pump foamer container capable of discharging foam by pushing down the nozzle portion, and a porous membrane of 305 mesh and 200 mesh, the liquid skin cleanser composition is heated under the temperature conditions used. The viscosity of the material is preferably 30 mPa·s or less, more preferably 25 mPa·s or less.
The viscosity is measured using, for example, a BM type viscometer (manufactured by Tokyo Keiki Co., Ltd.) at a sample temperature of 25° C., a number of revolutions of 60 rpm, No. It can be measured by measuring the viscosity after 1 minute with No. 1 rotor.

-container-
The liquid skin cleanser composition is of the type that is filled into a foamer container and discharged in a foamy form.
The foamer container is not particularly limited and can be appropriately selected from known foamer containers. Examples thereof include non-gas foam discharge containers and aerosol containers using a propellant and a pressure-resistant container. Among these, a non-gas foam discharge container is preferable.

The non-gas type foam discharge container is not particularly limited as long as it can mix the liquid skin cleanser composition with air and discharge it in a foamed state, and can be appropriately selected according to the purpose. , a squeeze foamer container in which foam can be discharged by manually squeezing the body of the bottle, and a pump foamer container in which foam can be discharged by pushing down the nozzle. As such a former container, those manufactured by Yamato Seikan Co., Ltd., Yoshino Kogyosho Co., Ltd., or the like can be used. More specifically, as the former container, the former containers described in JP-A-7-315463, JP-A-8-230961, JP-A-2005-193972, etc. can be used.

The non-gas type foam discharge container has a foam forming member, specifically, a porous membrane (preferably a plastic material such as nylon, polyester, polyolefin, etc.) for forming foam. and foam is formed by the liquid skin cleansing composition passing through the porous membrane.

The mesh of the porous membrane is not particularly limited and can be appropriately selected depending on the purpose. .
The number of the porous membranes is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of improving foam performance, 2 to 4 are preferable.

-Production method-
The method for producing the liquid skin cleanser composition is not particularly limited and may be appropriately selected depending on the intended purpose. Further, if necessary, the above component (D), the above other components, and purified water (blended as the remaining amount so that the total liquid skin cleansing composition is 100% by mass) can be mixed.
Specifically, the component (A) is dissolved in purified water heated to 70° C. to 80° C., cooled to 40° C. or less, and then the component (B), the component (C), and necessary It can be produced by adding the component (D) and the other components according to the above.

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 application site of the liquid skin cleanser composition is not particularly limited and can be appropriately selected according to the intended purpose.

The use of the liquid skin cleanser composition is not particularly limited and can be appropriately selected according to the purpose. Smoothness and elasticity of the skin after towel-drying are good, and low-temperature stability is excellent. In particular, it can be suitably used as a body soap that is foamed with a cleaning tool such as a nylon towel or cotton towel.

EXAMPLES The present invention will be specifically described below with reference to 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", the total amount is 100% by mass, and all values are converted to pure content. In addition, the mass ratio [(C)/(A)] of the content (% by mass) of component (A) to the content (% by mass) of component (C) is rounded to the second decimal place, The following are listed up to the first place. Mass ratio of the total content (% by mass) of component (a1) (potassium palmitate) and component (a2) (potassium stearate) to the content of component (A) [((a1) + (a2))/ (A)] is rounded off to the second decimal place and described.

(Examples 1-11 and 19-32, and Comparative Examples 1-10)
Liquid skin cleansing compositions having compositions and contents shown in Tables 1 to 5 below were prepared according to the following method.
Purified water is heated to 70 ° C. to 80 ° C. to dissolve the anionic surfactant of component (A), cooled to 40 ° C. or less, and the cationic polymer of component (B) or component (B) Cationized cellulose as a comparative component and polyethylene glycol as a component (C) or a comparative component of (C) were added. The purified water was used in an amount of 95% by mass of the finally obtained liquid skin cleanser composition. After that, if the pH is less than the predetermined pH (pH 10.0), the common component potassium hydroxide is added to adjust the predetermined pH to 10.0, and then the common components lauramidopropyl betaine and propylene glycol are added. , and fragrance were added, and purified water was added so that the total amount was 100% by mass to obtain liquid skin cleanser compositions of Examples 1 to 11 and 19 to 32, and Comparative Examples 1 to 10.
When preparing each liquid skin cleanser composition, a propeller was used as a stirring blade, and stirring was performed using a three-one motor (HEIDON BL1200, manufactured by Shinto Kagaku Co., Ltd.). Further, the pH was measured at 25° C. using a pH meter (HM-30R, manufactured by TOA DKK).

(Examples 12-18)
Liquid skin cleansing compositions having compositions and contents shown in Tables 2 and 3 below were prepared according to the following method.
In the preparation of the liquid skin cleanser compositions of Examples 1 to 11 and 19 to 32, the anionic surfactant as component (A) was dissolved, and the cationic polymer as component (B) and polyethylene glycol as component (C) were dissolved. were added in the same manner as the method for preparing the liquid skin cleanser compositions of Examples 1 to 10 and 16 to 29, except that the copolymer of component (D) was also added. were obtained.

Each of the obtained liquid skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 10 was filled in a container with a foamer pump dispenser [discharge volume 3 mL, manufactured by Yoshino Kogyosho Co., Ltd.], and subjected to the following evaluation. Using.

The liquid skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 10 were evaluated for "foam retention", "skin smoothness during rinsing", and "skin elasticity after towel drying" as follows. ", "Tightness of the skin after drying with a towel", and "Low temperature stability" were evaluated and determined. The results are shown in Tables 1 to 5 below.

<foam retention>
Ten professional evaluators took 2 pushes (approximately 6 g) of each liquid skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 10 onto a nylon towel (Awastar Body Towel Soft, manufactured by Kikuron Co., Ltd.). After washing the whole body, "foam retention" was observed and evaluated based on the following evaluation criteria. The results were determined based on the following evaluation criteria for the average score obtained by obtaining the average score of the 10 professional evaluators.
－Evaluation Criteria for “Foam Retention”－
4 points: By the time you finish washing your body, most of the foam that was applied to your body at the beginning of washing remains. 3 points: By the time you finish washing your body, about 80% to 50% of the foam that was applied to your body at the beginning of washing will remain. 2 points: By the time you finish washing your body, about 20% to 40% of the foam that was applied to your body at the beginning of washing remains. 1 point: By the time you finish washing your body, most of the foam that was applied to your body when you started washing will remain No - Criteria for "foam retention" -
◎: The average score is 3.5 or more and 4.0 or less ○: The average score is 3.0 or more and less than 3.5 △: The average score is 2.0 or more and 3.0 Less than ×: The average score is less than 2.0 points

<Smoothness of skin when rinsing>
Ten professional evaluators took 5 pushes (about 15 g) of each liquid skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 10, washed the whole body by hand, and then rinsed with warm water at 40°C. The "smoothness of the skin after rinsing" was evaluated based on the following evaluation criteria. The results were determined based on the following evaluation criteria for the average score obtained by obtaining the average score of the 10 professional evaluators.
-Evaluation criteria for "Smoothness of skin when rinsing"-
4 points: strong feeling of smoothness on the skin 3 points: feeling of smoothness on the skin 2 points: slightly feeling smoothness on the skin 1 point: no feeling of smoothness on the skin - "Smoothness of the skin during rinsing" criterion-
◎: The average score is 3.5 or more and 4.0 or less ○: The average score is 3.0 or more and less than 3.5 △: The average score is 2.0 or more and 3.0 Less than ×: The average score is less than 2.0 points

<Elasticity of skin after towel drying>
Ten professional evaluators took 5 pushes (about 15 g) of each liquid skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 10, washed the whole body by hand, and then rinsed with warm water at 40°C. Rinse and towel dry. After resting for 30 minutes in a constant temperature room at 24° C., the “elasticity of the skin after drying with a towel” was evaluated based on the following criteria. The results were determined based on the following evaluation criteria for the average score obtained by obtaining the average score of the 10 professional evaluators.
-Evaluation criteria for “skin elasticity after towel drying”-
4 points: Strong sensation of skin movement when the palm is pressed on the forearm 3 points: The sensation of skin movement when the palm is pressed on the forearm 2 points: The sensation of skin movement when the palm is pressed on the forearm 1 point: The skin does not move when the forearm is pressed with the palm - Criteria for “skin elasticity after drying with a towel” -
◎: The average score is 3.5 or more and 4.0 or less ○: The average score is 3.0 or more and less than 3.5 △: The average score is 2.0 or more and 3.0 Less than ×: The average score is less than 2.0 points

<Skin tightness after drying with a towel>
Ten professional evaluators took 5 pushes (about 15 g) of each liquid skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 10, washed the whole body by hand, and then rinsed with warm water at 40°C. Rinse and towel dry. After resting for 30 minutes in a constant temperature room at 24° C., the “tightness of the skin after drying with a towel” was evaluated based on the following evaluation criteria. The results were determined based on the following evaluation criteria for the average score obtained by obtaining the average score of the 10 professional evaluators.
-Evaluation criteria for “skin tightness after towel drying”-
4 points: no skin tightness at all 3 points: slightly tight skin feeling 2 points: considerable skin tightness feeling 1 point: very tight skin feeling Judgment criteria for "tight feeling"-
◎: The average score is 3.5 or more and 4.0 or less ○: The average score is 3.0 or more and less than 3.5 △: The average score is 2.0 or more and 3.0 Less than ×: The average score is less than 2.0 points

<Low temperature stability>
About 50 g of each of the liquid skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 10 was placed in a cylindrical transparent glass bottle (4 cm in diameter, 7.5 cm in height) and kept in a constant temperature bath at -5°C for 2 weeks. saved. A specialized panelist visually observed the state of deposit formation of the liquid skin cleanser composition after storage for 2 weeks, and evaluated based on the following evaluation criteria.
－Criteria for “low temperature stability”－
◎: no precipitation of crystals or solids is observed within 2 weeks 〇: almost no precipitation of crystals or solids is observed within 2 weeks (no problem in terms of commercial value)
×: Precipitation of a large amount of crystals or solids is observed within 2 weeks

Details of each component used in Examples 1 to 32 and Comparative Examples 1 to 10 are shown in Table 6 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（液体苛性カリ、旭硝子株式会社製）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（液体苛性カリ、旭硝子株式会社製）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 (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
*4: Potassium stearate was prepared by neutralizing stearic acid (NAA-180, manufactured by NOF Corporation) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).

The liquid skin cleanser composition can be suitably used in a foamer container, has excellent foam retention, does not give a tight feeling to the skin after drying with a towel, and smoothes the skin during rinsing and improves the skin after drying with a towel. Since it has good elasticity and excellent low-temperature stability, it can be used, for example, for body shampoo, body soap, facial cleansing foam, hand soap, foaming hand soap, cleansing foam, makeup remover, etc. Especially, nylon towels and cotton. It can be suitably used as a body soap that is foamed with a cleaning tool such as a towel.

Claims (4)

(A) an anionic surfactant containing at least one selected from (a1) palmitate and (a2) stearate;
(B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymers and dimethyldiallylammonium chloride-acrylic acid copolymers;
(C) polyethylene glycol having an average molecular weight of 190 to 630;
contains
The content of the component (A) is 10% by mass to 25% by mass,
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,
The mass ratio of the content of the component (A) to the content of the component (C) [(A)/(C)] is 15 to 100,
A liquid skin cleanser composition which is filled in a foamer container. 2. The liquid skin cleanser composition according to claim 1, further comprising (D) a copolymer represented by the following general formula (1).

However, in the general formula (1), n, m, and z indicate the molar ratio (mol%) of each structural unit, n + m + z = 100, the n is 0 to 34, the m is 24 to 31, The z is 35-76. The mass ratio of the total content of the (a1) palmitate and the (a2) stearate to the content of the component (A) [((a1) + (a2)) / (A)] is 0 3. The liquid skin cleanser composition according to any one of claims 1 to 2, wherein the ratio is from 1 to 0.5. The content of the component (B) is 0.2% by mass to 0.8% by mass,
The content of the component (C) is 0.2% by mass to 0.8% by mass,
The content of the component (D) is 0.05% by mass to 0.3% by mass
The liquid skin cleanser composition according to any one of claims 1 to 3.