JP7236314B2 - Liquid skin cleanser composition - Google Patents

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 a large amount of foam, good foam performance such as foam elasticity, good rinsing feel, and towel drying. It is strongly desired that, in addition to good finish feeling such as smoothness and non-stickiness of the skin after washing, the feeling of moisture is maintained with less tension even after repeated washings. Further, in recent years, a liquid skin cleanser composition filled in a foamer container that can be discharged as foam has been used.

A liquid skin cleanser composition containing a fatty acid salt and a nonionic surfactant has been proposed so far (see Patent Document 1). However, the proposed liquid skin cleanser composition does not have a long-lasting moisturizing feeling, and is also insufficient in terms of finished feeling such as smoothness of the skin after drying with a towel.

A hand cleansing composition containing a fatty acid salt and an amphoteric surfactant has also been proposed (see Patent Document 2). However, this proposed hand cleansing composition does not provide a long-lasting moisturizing feeling or a finish feeling such as smoothness of the skin after drying with a towel. there were. Moreover, since it contains an alkyl acrylate copolymer emulsion, it has a high viscosity and cannot be used for a former container.

Further, a higher fatty acid salt containing all of laurate, myristate, and palmitate, a cationic polymer, an alkyl group having 12 to 16 carbon atoms, and an average added mole number of ethylene oxide of 19 to 50 There has also been proposed a liquid skin cleanser composition containing polyoxyethylene alkyl ether and the like (see Patent Document 3). However, this proposed liquid skin cleanser composition does not have a lasting moist feeling.

Therefore, the liquid skin cleansing composition is excellent in the amount of foam, the elasticity of the foam, the smoothness of the skin after towel-drying, the persistence of moist feeling, the absence of taut feeling, and the non-stickiness of the skin after towel-drying. The current situation is that the product has not yet been provided, and its rapid development is strongly desired.

JP 2007-169248 A Japanese Patent Application Laid-Open No. 2006-182698 International Publication No. 2008/100876

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 is excellent in the amount of foam, the elasticity of the foam, the smoothness of the skin after towel-drying, the persistence of moist feeling, the absence of taut feeling, and the non-stickiness of the skin after towel-drying. It is an object of the present invention to provide a liquid skin cleanser composition.

As a result of intensive studies to achieve the above object, the present inventors found that (A) an anionic surfactant, (B) a dimethyldiallylammonium chloride polymer, and a dimethyldiallylammonium chloride-acrylic acid copolymer and (C1) a polyoxyethylene alkyl ether type nonion having an alkyl chain length of 19 to 24 and an average added mole number of ethylene oxide of 5 to 20 mol. and (C2) a polyoxyethylene alkyl ether type nonionic surfactant having an alkyl chain length of 14 to 18 and an average number of moles of ethylene oxide added of 7 to 20 mol. and the mass ratio of the content of the component (C1) to the content of the component (C2) [(C1)/(C2)] is 0.15 to 4, and the chloride of the component (B) The molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium-acrylic acid copolymer is 65 mol% or more, and the liquid skin cleanser composition filled in a foamer container contains each of these components. Due to the synergistic effect of , the amount of foam, the elasticity of the foam, the smoothness of the skin after towel-drying, the persistence of moisture, the lack of tightness, and the non-stickiness of the skin after towel-drying. I found out.

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;
(C1) a polyoxyethylene alkyl ether type nonionic surfactant having an alkyl chain length of 19 to 24 and an average added mole number of ethylene oxide of 5 to 20 mol;
(C2) a polyoxyethylene alkyl ether type nonionic surfactant having an alkyl chain length of 14 to 18 and an average number of added moles of ethylene oxide of 7 to 20 mol,
The mass ratio [(C1)/(C2)] of the content of the component (C1) to the content of the component (C2) is 0.15 to 4,
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,
The liquid skin cleanser composition is filled in a foamer container.
<2> (D) The liquid skin cleanser composition according to <1>, further containing an amphoteric surfactant.
<3> The liquid skin cleanser composition according to any one of <1> to <2>, which has a viscosity of 5 mPa·s to 25 mPa·s at 25°C.
<4> The content of component (A) is 5% by mass to 10% by mass, the content of component (B) is 0.05% by mass to 0.5% by mass, and the content of component (C1) is 0.05% by mass to 1% by mass, and the content of component (C2) is 0.2% by mass to 1% by mass. composition.
<5> The liquid skin cleanser composition according to any one of <2> to <4>, wherein the content of component (D) is 3% by mass to 10% by mass.

According to the present invention, the above-mentioned problems in the conventional art can be solved and the above-mentioned objects can be achieved. It is possible to provide a liquid skin cleanser composition which is excellent in the absence of tautness and the non-stickiness of the skin after drying with a towel.

(Liquid skin cleanser composition)
The liquid skin cleanser composition of the present invention contains (A) an anionic surfactant, and (B) at least one selected from dimethyldiallylammonium chloride polymers and dimethyldiallylammonium chloride-acrylic acid copolymers. a cationic polymer, (C1) a polyoxyethylene alkyl ether-type nonionic surfactant having an alkyl chain length of 19 to 24 and an average number of added moles of ethylene oxide of 5 to 20 mol, and (C2 ) a polyoxyethylene alkyl ether type nonionic surfactant having an alkyl chain length of 14 to 18 and an average number of added moles of ethylene oxide of 7 to 20 mol, and (D) an amphoteric interface It preferably contains an active agent and, optionally, other ingredients.

<(A) anionic surfactant>
The anionic surfactant of component (A) is contained in order to increase the amount of foam and improve the elasticity of the foam.

The anionic surfactant of component (A) is not particularly limited and can be appropriately selected according to the purpose. Polyoxyethylene (POE) alkyl ether sulfates, ether carboxylates, amino acid type surfactants, olefin sulfonates and the like are preferred. These may be used individually by 1 type, and may use 2 or more types together.

-Higher Fatty Acid Salt-
The higher fatty acid salt is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include laurate, myristate, palmitate and stearate. These may be used individually by 1 type, and may use 2 or more types together.

The counter ion of the higher fatty acid is not particularly limited and can be appropriately selected depending on the purpose. Examples include alkali metal ions such as sodium ion and potassium ion; ammonium ion; monoethanolamine, diethanolamine, triethanolamine. alkanolamines such as lysine; basic amino acids such as lysine and arginine; Among these, the counter ion is preferably an alkali metal ion, more preferably a potassium ion, from the viewpoint of the amount of foam and the elasticity of the foam.

As the higher fatty acid salt, an appropriately synthesized one may be used, or a commercially available product may be used.
Examples of commercially available higher fatty acid salts include NAA (registered trademark)-122 (lauric acid), NAA (registered trademark)-142 (myristic acid), NAA (registered trademark)-160 (palmitic acid), NAA ( Registered trademark)-180 (stearic acid) (manufactured by NOF Corporation) and other commercially available higher fatty acids are neutralized with salts such as potassium hydroxide, triethanolamine, and monoethanolamine to produce laurin. acid salts, myristates, palmitates, stearates and the like.

- Polyoxyethylene (POE) alkyl ether sulfate -
The average number of moles of ethylene oxide (EO) added to the POE alkyl ether sulfate is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 1 to 5.
The alkyl chain length of the POE alkyl ether sulfate is not particularly limited and can be appropriately selected depending on the purpose, but 10 to 14 is preferable.

Specific examples of the POE 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.

As the POE alkyl ether sulfate, an appropriately synthesized one may be used, or a commercially available product may be used.
Commercially available products of the POE alkyl ether sulfate include, for example, Emal 20C (polyoxyethylene (3) sodium lauryl ether sulfate), Emal 270J (polyoxyethylene (2) sodium lauryl ether sulfate), Emal 20CM (polyoxyethylene (3) Alkyl (C12,13) sodium ether sulfate), Emal 125HP (polyoxyethylene (1) sodium lauryl ether sulfate) (manufactured by Kao Corporation), Alscope (registered trademark) DA-330S (polyoxyethylene) (3) Alkyl (C12,13) sodium ether sulfate), Alscope (registered trademark) A-225B (polyoxyethylene (2) ammonium lauryl ether sulfate) (above, Toho Chemical Industry Co., Ltd.), Shinoline SPE-1150 (poly Oxyethylene (1) sodium lauryl ether sulfate), Shinoline SPE-1250 (polyoxyethylene (2) sodium lauryl ether sulfate), Shinoline SPE-1350 (polyoxyethylene (3) sodium lauryl ether sulfate) (above, Shin Nippon Rika Co., Ltd.).

- Ether carboxylate -
The ether carboxylate is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include compounds represented by the following general formula (A1) or (A2). The ether carboxylates may be used singly or in combination of two or more.

In the general formulas (A1) and (A2), R ² is a straight or branched chain alkyl group or alkenyl group having 5 to 23 carbon atoms, or a straight or branched chain alkyl group 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 ² moiety is preferably 10 to 14.

In general formula (A1), 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 (A1), 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 the general formulas (A1) and (A2), ^M1 represents a hydrogen atom, alkali metal, alkaline earth metal, alkanolamine, ammonium or basic amino acid.

Specific examples of the compound represented by the general formula (A1) or (A2) include polyoxyethylene (3) sodium lauryl ether acetate (average number of added moles of EO is 3 mol), polyoxyethylene (4) lauryl Potassium ether acetate (the average number of added moles of EO is 4 mol), sodium lauryl glycol acetate, and the like.

The ether carboxylate may be appropriately synthesized or may be a commercially available product.
Examples of commercially available ether carboxylates include Enagicol EC-30 (polyoxyethylene (3) sodium lauryl ether acetate, manufactured by Lion Specialty Chemicals Co., Ltd.), Beaulite LCA-25F (polyoxyethylene (3 ) Sodium lauryl ether acetate), Beaulite LCA (polyoxyethylene (3) sodium lauryl ether acetate), Beaulite LCA-30D (polyoxyethylene (3) sodium lauryl ether acetate), Beaulite LCA-H (polyoxyethylene (4) sodium lauryl ether acetate), Beaurite LCA-25NH (polyoxyethylene (3) sodium lauryl ether acetate), Beaurite SHAA (sodium lauryl glycol carboxylate) (manufactured by Sanyo Chemical Industries, Ltd.), Kao Akipo RLM -45NV (polyoxyethylene (4.5) sodium lauryl ether acetate), Kaoakipo RLM-100NV (polyoxyethylene (10) sodium lauryl ether acetate) (manufactured by Kao Corporation) and the like.

- Amino Acid Type Surfactant -
The amino acid-type surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include compounds represented by the following general formula (A3). The amino acid-type surfactants may be used singly or in combination of two or more.

In the general formula (A3), R ² 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 ² moiety is preferably 8 to 18.

In general formula (A3), R ⁴ represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.

In general formula (A3), R ⁵ and R ⁶ may be the same or different and represent a hydrogen atom or —(CH ₂ ) _m —COOM ² .

In the general formula (A3), m and n may be the same or different and each represents a number of 0-20.

In general formula (A3), M ¹ and M ² may be the same or different and represent a hydrogen atom, alkali metal, alkaline earth metal, alkanolamine, ammonium or basic amino acid.

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

Specific examples of the amino acid type surfactant represented by the general formula (A3) include potassium N-cocoyl-glycine (potassium N-coconut fatty acid acylglycine), sodium N-cocoyl-glycine (N-coconut fatty acid N-acyl-glycine such as sodium acylglycinate) and salts thereof; N-acyl-N-carboxyethyl-glycine such as sodium N-myristoyl-N-carboxyethyl-glycine and salts thereof; sodium N-myristoyl-L-glutamate , N-lauroyl-L-sodium glutamate, potassium N-myristoyl-L-glutamate, potassium N-cocoate acyl-L-glutamate, N-cocoate acyl-L-sodium glutamate, N-palm acyl-L - N-acylglutamic acid and its salts such as sodium glutamate, sodium N-stearoyl-L-glutamate; N-lauroyl-N-methyl-β-alanine potassium, lauroylmethyl-β-alanine sodium, N-lauroyl-N-methyl - N-acyl-N-methyl-β-alanine such as β-alaninetriethanolamine, sodium cocoate methylalanine, N-cocoate acyl-DL-alaninetriethanolamine and salts thereof; N-cocoyl-β -N-acyl-β-alanine such as alanine triethanolamine and salts thereof; acyl sarcosine such as coconut oil fatty acid sarcosine triethanolamine and sodium myristoylmethylaminoacetate and salts thereof;

The amino acid-type surfactant may be appropriately synthesized or may be a commercially available product.
Examples of commercially available amino acid-type surfactants include Amylite (registered trademark) GCK-11 (potassium N-coconut fatty acid acylglycine) and 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 - cocoate acyl-L-glutamate sodium), Amisoft CS-22 (potassium N-cocoate acyl-L-glutamate), Amisoft LS-11 (N-lauroyl-L-glutamic acid) sodium), 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® HS21 (disodium N-stearoyl-L-glutamate), Amilite® ACS-12 (N-coconut fatty acid acyl-L-alanine sodium) (manufactured by Ajinomoto Co., Inc.), Amino Surfact (registered trademark) AMMS-P1 (sodium N-myristoyl-L-glutamate) (manufactured by Asahi Kasei Chemicals Corporation), 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 ( Sodium lauroylmethyl-β-alanine) (manufactured by Kawaken Fine Chemicals Co., Ltd.), Enagicol L-30AN (sodium lauroylmethyl-β-alanine) (manufactured by Lion Specialty Chemicals Co., Ltd.), Softilt AT-L (N- lauroyl-N-methyl-β-alanine triethanolamine) (manufactured by NOF Corporation) and the like.

Among these, as the anionic surfactant of the component (A), the higher fatty acid salt is preferable from the viewpoint of the amount of foam and the elasticity of the foam, and it is selected from laurate and myristate. A higher fatty acid salt containing at least one of the above is more preferred.

The method for blending the anionic surfactant of component (A) is not particularly limited, and can be appropriately selected according to the purpose. and a salt capable of forming the counterion such as potassium hydroxide, triethanolamine, monoethanolamine, etc., may be separately added to a blending tank for neutralization reaction to obtain an anionic surfactant.

The content of the anionic surfactant of component (A) is not particularly limited and can be appropriately selected depending on the purpose. From the standpoint of flexibility and lack of tautness, it is preferably 2% to 20% by mass, more preferably 5% to 10% by mass, and 6% to 9% by mass, based on the total amount of the liquid skin cleanser composition. % by weight is particularly preferred. When the content of the component (A) is 2% by mass or more, the amount of foam and elasticity of the foam are good. It is good that it is lacking.

<(B) At least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer>
The cationic polymer of the component (B) is at least one selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer, and has excellent foam elasticity and skin properties after towel drying. Contains to improve smoothness and longevity of moisture.

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６５以上である。 The dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) has a molar ratio of structural units derived from dimethyldiallylammonium chloride of 65 mol% or more, and is represented by the following general formula (B1). be.

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 65 or more.

The molar ratio of the structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is the elasticity of the foam, smoothness of the skin after drying with a towel, and From the viewpoint of the persistence of moist feeling, it is 65 mol % or more, preferably 95 mol % or more. If the molar ratio is less than 65 mol %, the elasticity of the foam, the smoothness of the skin after drying with a towel, and the persistence of moisturizing feeling may deteriorate.

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 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 not particularly limited and can be appropriately selected depending on the purpose. 15,000 mPa·s is preferable, and 20 mPa·s to 12,000 mPa·s is more preferable.
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.

MERQUAT 100 (dimethyldiallylammonium chloride polymer (polyquaternium-6), manufactured by Lubrizol, 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 (dimethyldiallylammonium chloride polymer (polyquaternium-6), 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 280 (dimethyldiallylammonium chloride-acrylic acid copolymer (polyquaternium-22), manufactured by Lubrizol, viscosity at 25 ° C. with a solid content of 39% to 43% by mass: 3,000 mPa s to 6,000 mPa s 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.

Marquat 295 (dimethyldiallylammonium chloride-acrylic acid copolymer (polyquaternium-22), manufactured by Lubrizol, viscosity at 25 ° C. with a solid content of 35% to 40% by mass: 3,500 mPa s to 9,000 mPa s 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.

These commercially available products of component (B) may be used singly or in combination of two or more. Among these, as the cationic polymer of the component (B), Merquat 100, Merquat 295, Marquat 280, etc. are used in terms of foam elasticity, smoothness of the skin after drying with a towel, and persistence of moist feeling. Marquat 100, Marquat 106, Marquat 295 and the like are more preferred.

The content of the cationic polymer of the component (B) is the amount of foam, elasticity of the foam, smoothness of the skin after drying with a towel, persistence of moist feeling, and non-stickiness after drying with a towel. from the point of view, the total amount of the liquid skin cleanser composition is preferably 0.03% by mass to 1% by mass, more preferably 0.05% by mass to 0.5% by mass, and 0.05% by mass to 0.2% by weight is particularly preferred. When the content of the component (B) is 0.03% by mass or more, the elasticity of the foam, the smoothness of the skin after towel-drying, and the durability of the moist feeling are good, and when the content is 1% by mass or less, When there is, the large amount of foam and the absence of stickiness after drying with a towel are good.

<(C1) Polyoxyethylene Alkyl Ether Type Nonionic Surfactant Having an Alkyl Chain Length of 19 to 24 and an Average Number of Added Moles of Ethylene Oxide of 5 to 20 Moles>
The polyoxyethylene (POE) alkyl ether type nonionic surfactant in which the alkyl chain length of the component (C1) is 19 to 24 and the average number of moles of ethylene oxide added is 5 to 20 mol, is moisturizing Contains to improve lasting sensation.
The component (C1) may be used alone or in combination of two or more.

The alkyl chain length of the alkyl group in the POE alkyl ether type nonionic surfactant of component (C1) is 19 to 24, preferably 20 to 22 in terms of persistence of moist feeling.

The alkyl group in the POE alkyl ether type nonionic surfactant of component (C1) may be linear or branched. It is preferably chain-like.

The average number of moles of EO added to the POE alkyl ether type nonionic surfactant of component (C1) is 5 to 20 mol, preferably 5 to 10 mol, from the standpoint of persistence of moist feeling.

The POE alkyl ether type nonionic surfactant of component (C1) is not particularly limited as long as the alkyl chain length is 19 to 24 and the average number of moles of EO added is 5 to 20 mol. , can be appropriately selected depending on the purpose, but polyoxyethylene (5) behenyl ether (average number of added moles of EO is 5 mol), polyoxyethylene (10) behenyl ether (average number of added moles of EO is 10 mol), polyoxyethylene (5) octyldodecyl ether (average number of added moles of EO is 5 mol), polyoxyethylene (10) octyldodecyl ether (average number of added moles of EO is 10 mol), polyoxyethylene (5 ) Decyltetradecyl ether (average number of added moles of EO is 5 mol), polyoxyethylene (20) decyltetradecyl ether (average number of added moles of EO is 20 mol), etc. are preferable, and polyoxyethylene (5) octyldodecyl Ethers are more preferred.

As the POE alkyl ether type nonionic surfactant of the component (C1), an appropriately synthesized one may be used, or a commercially available product may be used.
Commercially available products of the POE alkyl ether type nonionic surfactant of component (C1) include, for example, EMALEX OD-5 (manufactured by NOF Corporation), EMALEX OD-10 (manufactured by NOF Corporation), nonionic OD- 20 (manufactured by NOF Corporation) and other polyoxyethylene octyldodecyl ethers; NIKKOL BB-5 (manufactured by Nikko Chemical Co., Ltd.), Nonion B-205 (manufactured by NOF Corporation), EMALEX BHA-20 (Nippon Emulsion Co., Ltd. (manufactured by Nippon Emulsion Co., Ltd.); and polyoxyethylene decyltetradecyl ethers such as EMALEX 2405 (manufactured by Nippon Emulsion Co., Ltd.) and EMALEX 2420 (manufactured by Nippon Emulsion Co., Ltd.).
It is difficult to obtain commercial products of POE alkyl ether type nonionic surfactants having more than 24 carbon atoms.

The content of the POE alkyl ether type nonionic surfactant as the component (C1) is selected from the viewpoint of the amount of foam, the persistence of the moist feeling, and the lack of stickiness after drying with a towel. It is preferably 0.03% to 2% by mass, more preferably 0.05% to 1% by mass, and particularly preferably 0.05% to 0.4% by mass, relative to the total amount of the agent composition. When the content of the component (C1) is 0.03% by mass or more, the moist feeling lasts well, and when it is 2% by mass or less, the amount of foam and stickiness after towel drying are large. It is good that it is lacking.

<(C2) Polyoxyethylene Alkyl Ether Type Nonionic Surfactant Having an Alkyl Chain Length of 14 to 18 and an Average Number of Added Moles of Ethylene Oxide of 7 to 20 Moles>
The polyoxyethylene alkyl ether type nonionic surfactant in which the alkyl chain length of the component (C2) is 14 to 18 and the average number of added moles of ethylene oxide is 7 to 20 mol, does not give a taut feeling. It is included to improve
The component (C2) may be used singly or in combination of two or more.

The alkyl chain length of the alkyl group in the POE alkyl ether type nonionic surfactant of component (C2) is 14 to 18, preferably 16 to 18 in terms of lack of taut feeling.

The alkyl group in the POE alkyl ether type nonionic surfactant of component (C2) may be linear or branched.

The average number of moles of EO added to the POE alkyl ether type nonionic surfactant of component (C2) is 7 to 20 moles, preferably 10 to 15 moles in terms of lack of tautness.

The POE alkyl ether type nonionic surfactant of component (C2) is not particularly limited as long as the alkyl chain length is 14 to 18 and the average number of moles of EO added is 7 to 20 moles. , can be appropriately selected depending on the purpose, polyoxyethylene (15) cetyl ether (average number of added moles of EO is 15 mol), polyoxyethylene (20) cetyl ether (average number of added moles of EO is 20 mol), polyoxyethylene (11) stearyl ether (average number of added moles of EO is 11 mol), polyoxyethylene (20) stearyl ether (average number of added moles of EO is 20 mol), etc., and polyoxyethylene ( 15) Cetyl ether and polyoxyethylene (11) stearyl ether are more preferred.

As the POE alkyl ether type nonionic surfactant of component (C2), an appropriately synthesized one may be used, or a commercially available product may be used.
Commercially available products of the POE alkyl ether type nonionic surfactant of component (C2) include, for example, Nonion P-207 (manufactured by NOF Corporation), EMALEX 107 (manufactured by Nippon Emulsion Co., Ltd.), EMALEX 115 (Nippon Emulsion Co., Ltd.), EMALEX 120 (manufactured by Nippon Emulsion Co., Ltd.), Pegnol C-18 (manufactured by Toho Chemical Industry Co., Ltd.) and other polyoxyethylene cetyl ethers; Aoki Oil Industry Co., Ltd.), NIKKOL BS-20 (manufactured by Nikko Chemical Co., Ltd.) and other polyoxyethylene stearyl ethers.

The content of the POE alkyl ether type nonionic surfactant as the component (C2) is selected from the viewpoints of the amount of foam, lack of tautness, and lack of stickiness after drying with a towel. 0.1% by mass to 2% by mass is preferred, 0.2% by mass to 1% by mass is more preferred, and 0.2% by mass to 0.4% by mass is particularly preferred, relative to the total amount of the composition. When the content of the component (C2) is 0.1% by mass or more, the feeling of tightness is good, and when it is 2% by mass or less, the amount of foam and stickiness after drying with a towel are reduced. Lack is good.

<Mass ratio [(C1)/(C2)]>
The mass ratio of the content of the component (C1) to the content of the component (C2) [(C1)/(C2)] is the amount of foam, the elasticity of the foam, the durability of the moist feeling, And from the point of non-stickiness after drying with a towel, it is 0.15 to 4, but 0.25 to 0.9 is preferable. When the mass ratio [(C1)/(C2)] is 0.15 or more, the moisture retention is good, and when it is 4 or less, the amount of foam, the elasticity of the foam, And good non-stickiness after towel drying.

<(D) amphoteric surfactant>
Further containing the amphoteric surfactant as the component (D) in the liquid skin cleanser composition can improve the amount of foam, the elasticity of the foam, and the absence of a taut feeling. is preferred.

The amphoteric surfactant of component (D) is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include betaine amphoteric surfactants and amino acid amphoteric surfactants. These may be used individually by 1 type, and may use 2 or more types together. Among these surfactants, betaine type amphoteric surfactants are preferable from the viewpoint of a large amount of foam, elasticity of foam, and lack of taut feeling.

The betaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. and imidazolinium betaine-type amphoteric surfactants. These may be used individually by 1 type, and may use 2 or more types together.

The alkylbetaine type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include betaine lauryldimethylaminoacetate, coconut oil alkylbetaine, and betaine stearyldimethylaminoacetate. These may be used individually by 1 type, and may use 2 or more types together.

The amidobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. are mentioned. These may be used individually by 1 type, and may use 2 or more types together.

The sulfobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. and lauryldimethylaminohydroxysulfobetaine. These may be used individually by 1 type, and may use 2 or more types together.

The imidazoline type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. acyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine and the like. These may be used individually by 1 type, and may use 2 or more types together.

Among these, amidobetaine-type amphoteric surfactants and alkylbetaine-type amphoteric surfactants are preferred, and lauramidopropyl betaine and lauryldimethylaminoacetic acid betaine are more preferred, in terms of foam volume and foam elasticity. Preferably, lauramidopropyl betaine is particularly preferred.

The (D) component may be appropriately synthesized or may be a commercially available product.
Examples of commercially available amphoteric surfactants of component (D) include Amphithol 24B (betaine lauryldimethylaminoacetate, manufactured by Kao Corporation), Nissan Anon (registered trademark) BL (betaine lauryldimethylaminoacetate, NOF Corporation). company), NIKKOL AM-301 (lauryldimethylaminoacetate betaine, manufactured by Nikko Chemicals Co., Ltd.), Amogen (registered trademark) S (lauryldimethylaminoacetate betaine, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Amogen (registered trademark) S Alkyl betaine-type amphoteric surfactants such as -H (lauryldimethylaminoacetate betaine, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.); Enagicol L-30B (lauramidopropyl betaine, manufactured by Lion Specialty Chemicals Co., Ltd.), Nissan Anon Amidobetaine-type amphoteric surfactants such as (registered trademark) BDF-SF (coconut fatty acid amidopropyl betaine, manufactured by NOF Corporation) and ovazoline CAG-30 (coconut fatty acid amidopropyl betaine, manufactured by Toho Chemical Industry Co., Ltd.) sulfobetaine-type amphoteric surfactants such as Amphitol 20HD (lauryl hydroxysulfobetaine, manufactured by Kao Corporation), softazoline LSB (lauramidopropyl hydroxysultaine, manufactured by Kawaken Fine Chemicals Co., Ltd.); NIKKOL AM-101 (2-alkyl -N-carboxymethyl-N-hydroxyethylimidazolinium betaine, manufactured by Nikko Chemical Co., Ltd.), Nissan Anon (registered trademark) GLM-R-LV (2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium) and imidazoline type amphoteric surfactants such as betaine, manufactured by NOF Corporation).

The content of the amphoteric surfactant of component (D) is not particularly limited and can be appropriately selected according to the purpose. From the standpoint of non-stickiness after drying with a towel, it is preferably 2% to 15% by mass, more preferably 3% to 10% by mass, and 4% to 10% by mass, based on the total amount of the liquid skin cleanser composition. % by weight is particularly preferred.

<Other ingredients>
The liquid skin cleanser composition contains ingredients other than the components (A), (B), (C1), (C2), and (D) that do not impair the effects of the present invention. Other ingredients can be blended as needed within the range.
Examples of the other components include a solvent (purified water, etc.), a water-soluble polymer other than the cationic polymer of the component (B), a nonionic surfactant other than the component (C1) and the component (C2), Humectants, sugars, oils, alcohols such as lower and higher alcohols, lanolin derivatives, protein derivatives, acrylic resin dispersions, drugs such as vitamins, bactericides, preservatives, pH adjusters, antioxidants, sequestering agents, UV absorbers, animal and plant extracts or their derivatives, dyes, perfumes, perfume compositions, pigments and the like. These may be used individually by 1 type, and may use 2 or more types together.
However, it is preferable to exclude thickening agents such as glycol distearate from the other ingredients.

The content of the other components 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.

<pH>
The pH of the liquid skin cleanser composition at 25° C. is preferably 9 to 11, more preferably 10, from the viewpoints of a large amount of foam, long-lasting moist feeling, and lack of taut feeling. When the pH is 9 or more, the amount of foam is good, and when the pH is 11 or less, the amount of foam is good, the moist feeling lasts, and the lack of a taut feeling is good.
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 is 3 mPa·s to 30 mPa at 25° C., in view of the large amount of foam and lack of taut feeling, since the composition is used by filling it in a foamer container. ·s is preferable, 5 mPa·s to 25 mPa·s is more preferable, and 5 mPa·s to 21 mPa·s is particularly preferable. When the viscosity is 3 mPa·s or more, the elasticity of the foam is good, and when it is 30 mPa·s or less, the amount of foam and the elasticity of the foam are good.
The viscosity is measured, for example, using a BM type viscometer (manufactured by Tokyo Keiki Co., Ltd.) at a temperature of 25° C. and a rotation speed of 60 rpm. It can be measured by measuring the viscosity after 1 minute with No. 1 rotor.

<former container>
The liquid skin cleanser composition of the present invention is filled in a foamer container. The foamer container is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include non-gas foam discharge containers. 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, for example, a former container manufactured by Yamato Seikan Co., Ltd., Yoshino Kogyosho Co., Ltd., or the like can be used.

The non-gas type foam discharge container usually has a porous membrane for forming foam, and foam is formed by passing the skin cleanser composition through the porous membrane.

The material of the porous membrane is not particularly limited and can be appropriately selected from those used in non-gas type foam discharge containers, but plastic materials such as nylon, polyester and polyolefin are preferred.

The mesh of the porous membrane is not particularly limited and can be appropriately selected depending on the intended purpose.

The number of the porous membranes is not particularly limited and can be appropriately selected depending on the intended purpose.

More specifically, the former containers described in JP-A-2007-222733, JP-A-2005-193972, etc. can be preferably used as the former container.

-Production method-
The method for producing the liquid skin cleansing composition of the present invention is not particularly limited and can be appropriately selected depending on the intended purpose. , and the component (C2), and if necessary, the component (D), the other components, etc., are mixed and dissolved.

Specifically, water and, if necessary, the other components are mixed, heated to 70° C. to 80° C., and then the anionic surfactant of the component (A) and the component (C1). Dissolve the nonionic surfactant and the nonionic surfactant of the component (C2), cool to 40 ° C. or less, and add the cationic polymer of the component (B) and, if necessary, the (D) It can be produced by adding the component amphoteric surfactant and dissolving it.

The liquid skin cleansing 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 has a large amount of foam, elasticity of the foam, smoothness of the skin after towel-drying, long-lasting moist feeling, no taut feeling, and smoothness of the skin after towel-drying. Since it is excellent in non-stickiness, it is suitably used for face wash, hand soap, body soap, cleansing foam, makeup remover, etc., and is particularly suitably used for hand soap.

The present invention will be described more specifically based on examples and comparative examples below, but the present invention is not limited to the following 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 [(C1)/(C2)] of the content of the component (C1) to the content of the component (C2) is rounded off to the second decimal place and described.

(Examples 1 to 32 and Comparative Examples 1 to 12)
Liquid skin cleansing compositions having compositions and contents shown in Tables 1 to 7 below were prepared by the following method.
Specifically, purified water, propylene glycol, monoethanolamine, edetic acid, and perfume, which are common ingredients, are used, and the amount of the liquid skin cleanser composition is 75% by mass of the total amount of the finally obtained liquid skin cleanser composition. A mixture was prepared. After heating this mixture of common components to 70° C. to 80° C., the anionic surfactant of component (A), the nonionic surfactant of component (C1) or the comparative component of component (C1), and The nonionic surfactant of component (C2) or the comparative component of component (C2) was added and dissolved. Then, it is cooled to 40° C. or less, and the cationic polymer of component (B) or the comparative component of component (B) and, if necessary, the amphoteric surfactant of component (D) are added and dissolved to form a liquid. A skin cleanser composition was prepared. Then, if the pH is less than the predetermined value, potassium hydroxide, which is a common component, is added to adjust the pH to 10, and then purified water is added so that the total amount becomes 100% by mass. A detergent composition was obtained.
The components were mixed by using a propeller as a stirring blade and stirring with a three-one motor (HEIDON BL1200, manufactured by Shinto Kagaku Co., Ltd.). The pH of the obtained liquid skin cleanser composition was measured using a pH meter (HM-30R, manufactured by TOA DKK) after constant temperature at 25°C and 3 minutes at 25°C. The viscosity of the resulting liquid skin cleanser composition was measured at 25°C with a BM viscometer (manufactured by Tokyo Keiki Co., Ltd.) after constant temperature at 25°C. No. 1 rotor was used, and the rotation speed was 60 rpm for 1 minute.

Each of the obtained liquid skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 12 was placed in a container with a foamer pump dispenser (dispensing volume: 1 mL, 2 pieces of 100 mesh, manufactured by Yoshino Kogyosho Co., Ltd.). It was filled and labeled as container "1" in Tables 1 to 7 below. In addition, the obtained liquid skin cleanser composition of Comparative Example 12 was filled in a container with a pump dispenser (dispensing volume: 1 mL, manufactured by Yoshino Kogyo Co., Ltd., nozzle diameter (inner diameter): 3.6 mm). Labeled as container "2".

The prepared liquid skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 12 were evaluated in the following manner for "amount of foam", "elasticity of foam", and "response after towel drying". Smoothness of the skin”, “durability of moisturizing feeling”, “non-tight feeling”, and “non-stickiness after drying with a towel” were evaluated. The results are shown in Tables 1 to 7 below.

<Evaluation of amount of foam>
10 professional evaluators took 1 push (about 1 g) of each of the liquid skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 12 on the palm and rubbed the palms of both hands 5 times back and forth. The quantity was observed and evaluated based on the following evaluation criteria. Next, the average value (average evaluation point) of the evaluation points evaluated by the 10 professional evaluators was determined, and the "amount of foam" was determined based on the following criteria.
In addition, when the judgment criteria were "○", "○ to ⊙", or "⊚", the pass level was taken.
-Evaluation Criteria for “Amount of Foam”-
5 points: The amount of foam after rubbing is the amount that overflows from the palms of both hands. 4 points: The amount of foam after rubbing is 90% or more of the area of the palms of both hands to the same amount as the area of the palms. 3 points: The amount of foam after rubbing is 60% or more and less than 90% of the palm area of both hands 2 points: The amount of foam after rubbing is 30% of the palm area of both hands % or more to less than 60% 1 point: The amount of foam after rubbing is less than 30% of the area of the palms of both hands - Criteria for "amount of foam" -
◎: Average evaluation score is 4.0 or more and 5.0 or less ○ ~ ◎: Average evaluation score is 3.5 or more and less than 4.0 points ○: Average evaluation score is 3.0 or more and less than 3.5 points △: Average evaluation score is 2.0 or more and less than 3.0 points ×: Average evaluation score is 1.0 or more and less than 2.0 points

<Evaluation of Foam Elasticity>
10 professional evaluators took 1 push (about 1 g) of each of the liquid skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 12 on the palm, rubbed the palms of both hands back and forth 5 times, and then removed the foam. The foam was pinched with both hands and pulled apart to make the peaks of the foam stand, and the elasticity of the foam was observed and evaluated according to the following evaluation criteria. Next, the average value (average evaluation point) of the evaluation points evaluated by the 10 professional evaluators was obtained, and the "elasticity of foam" was determined based on the following criteria.
In addition, when the judgment criteria were "○", "○ to ⊙", or "⊚", the pass level was taken.
-Evaluation Criteria for “Foam Elasticity”-
5 points: You feel the elasticity of the foam and a horn of 2 cm or more rises 4 points: You feel the elasticity of the foam and a horn of 1 cm or more and less than 2 cm rises 3 points: You feel the elasticity of the foam and a horn of 0.1 cm or more and less than 1 cm rises 2 points : You can feel the elasticity of the foam, but it does not form a peak. 1 point: You do not feel the elasticity of the foam.
◎: Average evaluation score is 4.0 or more and 5.0 or less ○ ~ ◎: Average evaluation score is 3.5 or more and less than 4.0 points ○: Average evaluation score is 3.0 or more and less than 3.5 points △: Average evaluation score is 2.0 or more and less than 3.0 points ×: Average evaluation score is 1.0 or more and less than 2.0 points

<Evaluation of smoothness of skin after towel drying>
10 professional evaluators took 1 push (about 1 g) of each of the liquid skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 12 on the palm and rubbed the palm and the back of the hand 5 times back and forth to measure the skin of the hands. After washing the whole, it was towel dried. This washing was performed 7 times a day, and 5 minutes after the 7th washing and drying with a towel, the palm was slid on the back of the hand, and the smoothness of the surface of the back of the hand was evaluated based on the following evaluation criteria. Next, the average value (average evaluation point) of the evaluation points evaluated by the 10 professional evaluators was obtained, and the "skin smoothness after drying with a towel" was evaluated based on the following criteria.
In addition, the case where the judgment criteria were "○" or "⊚" was regarded as a pass level.
-Evaluation criteria for “smoothness of skin after towel drying”-
5 points: The surface of the back of the hand is smooth and the palm slides well 4 points: The surface of the back of the hand is slightly smooth and the palm slides 3 points: The surface of the back of the hand is slightly smooth and the palm slides slightly 2 points: The surface of the back of the hand is slightly smooth 1 point: The surface of the back of the hand feels rough and the palm does not slide well -Criteria for “Smoothness of the skin after drying with a towel”-
◎: average evaluation score of 4.0 to 5.0 points ○: average evaluation score of 3.0 to less than 4.0 points △: average evaluation score of 2.0 to less than 3.0 points ×: Average score is 1.0 or more and less than 2.0

<Evaluation of durability of moist feeling>
10 professional evaluators took 1 push (about 1 g) of each of the liquid skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 12 on the palm and rubbed the palm and the back of the hand 5 times back and forth to measure the skin of the hands. After washing the whole, it was towel dried. This washing was carried out 7 times a day, and after 5 minutes from the 7th washing and drying with a towel, the moist feeling of the hand skin was evaluated based on the following evaluation criteria. Next, an average value (average evaluation point) of evaluation points evaluated by the 10 professional evaluators was obtained, and "durability of moisturizing feeling" was evaluated based on the following criteria.
In addition, the case where the judgment criteria were "○" or "⊚" was regarded as a pass level.
-Evaluation Criteria for “Sustainability of Moisture”-
5 points: I feel a strong moisturizing feeling 4 points: I feel a moisturizing feeling 3 points: I feel a slight moisturizing feeling 2 points: I don't feel a very moisturizing feeling 1 point: I don't feel a moisturizing feeling at all criterion-
◎: Average evaluation score of 4.0 to 5.0 points ○: Average evaluation score of 3.0 to 4.0 points △: Average evaluation score of 2.0 to 3.0 points ×: Average evaluation score 1.0 points or more and less than 2.0 points

<Evaluation of lack of tightness>
10 professional evaluators took 1 push (about 1 g) of each of the liquid skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 12 on the palm and rubbed the palm and the back of the hand 5 times back and forth to measure the skin of the hands. After washing the whole, it was towel dried. This washing was carried out 7 times a day, and 5 minutes after the 7th washing and drying with a towel, the feeling of tightness of the hand skin was evaluated based on the following evaluation criteria. Next, the average value (average evaluation point) of the evaluation points evaluated by the 10 professional evaluators was obtained, and the "lack of tight feeling" was evaluated based on the following criteria.
In addition, when the judgment criteria were "○", "○ to ⊙", or "⊚", the pass level was taken.
-Evaluation Criteria for “Lack of Tightness”-
4 points: no feeling of tightness 3 points: slightly feeling of tightness 2 points: feeling of feeling of tightness 1 point: feeling of very tightness
-Criteria for “Lack of tightness”-
◎: 3.7 points or more and 4.0 points or less ○ ~ ◎: 3.3 points or more and less than 3.7 points ○: 3.0 points or more and less than 3.3 points △: 2.0 points or more and less than 3.0 points ×: Less than 2.0 points

<Evaluation of non-stickiness after towel drying>
10 professional evaluators took 1 push (about 1 g) of each of the liquid skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 12 on the palm and rubbed the palm and the back of the hand 5 times back and forth to measure the skin of the hands. After washing the whole, it was towel dried. This washing was carried out 7 times a day, and immediately after the 7th washing and drying with a towel, stickiness was evaluated based on the following evaluation criteria. Next, the average value (average score) of the evaluation points evaluated by the 10 professional evaluators was determined, and the "non-stickiness after drying with a towel" was evaluated based on the following criteria.
In addition, the case where the judgment criteria were "○" or "⊚" was regarded as a pass level.
-Evaluation criteria for “non-stickiness after towel drying”-
5 points: No stickiness at all 4 points: Almost no stickiness 3 points: Slight stickiness, but no problem level 2 points: Feel stickiness 1 point: Strong stickiness - "Stickiness after towel drying Criteria for "noness" -
◎: Average evaluation score of 4.0 to 5.0 points ○: Average evaluation score of 3.0 to 4.0 points △: Average evaluation score of 2.0 to 3.0 points ×: Average evaluation score 1.0 points or more and less than 2.0 points

Details of each component used in the above Examples and Comparative Examples are shown in Table 8 below.

The liquid skin cleanser composition of the present invention has a large amount of foam, elasticity of the foam, smoothness of the skin after towel-drying, long-lasting moist feeling, no taut feeling, and smoothness of the skin after towel-drying. Since it is excellent in non-stickiness, it is suitably used for facial cleansers, hand soaps, body soaps, cleansing foams, makeup removers, and the like.

Claims (5)

(A) an anionic surfactant;
(B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymers and dimethyldiallylammonium chloride-acrylic acid copolymers;
(C1) A polyoxyethylene alkyl ether-type nonionic surfactant having an alkyl chain length of 19 to 24, an average added mole number of ethylene oxide of 5 to 20 mol, and a branched alkyl chain. an agent;
(C2) a polyoxyethylene alkyl ether type nonionic surfactant having an alkyl chain length of 14 to 18 and an average number of added moles of ethylene oxide of 7 to 20 mol,
The mass ratio [(C1)/(C2)] of the content of the component (C1) to the content of the component (C2) is 0.15 to 4,
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,
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) an amphoteric surfactant. 3. The liquid skin cleanser composition according to claim 1, which has a viscosity at 25° C. of 5 mPa·s to 25 mPa·s. The content of component (A) is 5% by mass to 10% by mass, the content of component (B) is 0.05% by mass to 0.5% by mass, and the content of component (C1) is 0.05% by mass to 0.5% by mass. 05% by mass to 1% by mass, and the content of component (C2) is 0.2% by mass to 1% by mass. The liquid skin cleanser composition according to any one of claims 2 to 4, wherein the content of component (D) is 3% by mass to 10% by mass.