KR20230116069A - liquid skin cleanser composition - Google Patents

Abstract

(A) (a1) an anionic surfactant containing at least one selected from palmitate and (a2) stearate, and (B) dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer A liquid comprising at least one selected cationic polymer and (C) polyethylene glycol having an average molecular weight of 190 to 630, having a mass ratio [(A)/(C)] of 15 to 100, and filled into a former container. It is a skin cleanser composition.

Description

liquid skin cleanser composition

The present invention relates to liquid skin cleanser compositions.

Conventionally, in liquid skin cleanser compositions such as hand soap and body soap, those with good foaming performance such as foam retention, those that give smoothness to the skin during rinsing, those that give elasticity to the skin after towel drying, and towels It is desired to have a good feeling of use, such as not feeling a tightening feeling on the skin after drying. However, compared to the majority of consumers washing with cleaning tools such as nylon towels and cotton towels, when using the foaming body soap, which has recently increased in demand, using cleaning tools, foam retention and low temperature There was a problem that compatibility of stability could not be satisfied.

In order to impart a good feeling of use, for example, a liquid skin cleanser composition containing a cationic polymer having a fatty acid salt and a structural unit derived from dimethyldiallylammonium chloride has been proposed (for example, Patent Documents 1 and 2 see etc.). However, the liquid skin cleanser composition of the above proposal is not satisfactory for foam retention when lathering using cleaning tools such as nylon towels and cotton towels, skin elasticity after towel drying, and low-temperature stability. there was

In addition, in order to improve the foam retention of the liquid skin cleanser composition, for example, a liquid skin cleanser composition containing a nonionic surfactant such as polyoxyethylene alkyl ether or fatty acid monoethanolamide has been proposed (e.g., See Patent Document 3). However, there was a problem that the liquid skin cleanser composition of the above proposal was not satisfactory for skin elasticity and low-temperature stability after towel drying.

In order to improve the foam retention of the liquid skin cleanser composition, it is generally known to add more long-chain fatty acids such as palmitic acid and stearic acid. However, when the ratio of long-chain fatty acids in the liquid skin cleanser composition is increased, fatty acids precipitate at low temperatures There were problems such as becoming unable to maintain a transparent appearance and reducing the elasticity of the skin after towel drying.

Therefore, it is excellent in foam retention when foaming using a cleaning tool such as a nylon towel or cotton towel, does not feel a tight feeling on the skin after towel drying, smoothness of the skin during rinsing, and elasticity of the skin after towel drying. The current situation is that the provision of a liquid skin cleanser composition filled in a foamer container capable of preventing precipitation of fatty acids and maintaining a transparent appearance even under low-temperature conditions is strongly desired.

Japanese Unexamined Patent Publication No. 2004-262838 Japanese Unexamined Patent Publication No. 2014-208633 International Publication No. 2019/97950 Specification

The present invention solves the above problems in the prior art and makes it a subject to achieve the following objects. That is, the present invention provides a liquid skin cleanser composition that is excellent in foam retention, does not feel tight on the skin after towel drying, has good skin smoothness during rinsing and good skin elasticity after towel drying, and has excellent low-temperature stability. intended to provide

As a result of intensive examination, the present inventors have found (A) (a1) an anionic surfactant containing at least one selected from palmitate and (a2) stearate; (B) a dimethyldiallylammonium chloride polymer and a chloride At least one type of cationic polymer selected from dimethyldiallylammonium-acrylic acid copolymers and (C) polyethylene glycol having an average molecular weight of 190 to 630 are contained, and the content of the component (A) 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 the component (B) is 40 mol% or more, and the above for the content of the component (C) The mass ratio [(A)/(C)] of the content of (A) component is 15 to 100, and the liquid skin cleanser composition filled in the foamer container has excellent foam retention and does not feel tight on the skin after towel drying. , the smoothness of the skin during rinsing and the elasticity of the skin after towel drying were good, and the low-temperature stability was found to be excellent.

This invention is based on the said knowledge by this inventor, and means for solving the said subject are as follows. in other words,

<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 polymer and dimethyldiallylammonium chloride-acrylic acid copolymer;

(C) containing polyethylene glycol having an average molecular weight of 190 to 630;

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,

It is a liquid skin cleanser composition characterized by being filled in a foamer container.

<2> (D) It is the liquid skin cleanser composition as described in said <1> which further contains the copolymer represented by 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 to 76.

<3> The mass ratio [((a1)+(a2))/(A)] of the total content of palmitate (a1) and stearate (a2) to the content of component (A) is 0.1 to 0.5 The liquid skin cleanser composition according to any one of <1> to <2>.

<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 said (D) component is 0.05 mass % - 0.3 mass %

The liquid skin cleanser composition according to any one of <1> to <3>.

According to the present invention, the above objects can be achieved by solving the various problems in the prior art, the foam retention is excellent, the skin does not feel tight after towel drying, the skin smoothness during rinsing and after towel drying It is possible to provide a liquid skin cleanser composition having good skin elasticity and excellent low-temperature stability.

(liquid skin cleanser composition)

The liquid skin cleanser composition of the present invention preferably contains (A) an anionic surfactant, (B) a cationic polymer, (C) polyethylene glycol, and (D) a copolymer. Therefore, it contains other components.

<(A) anionic surfactant>

The anionic surfactant as the component (A) is mainly contained in order to improve foam retention.

In addition, in this specification, "bubble maintenance" means that foam is maintained without being blown out when a washing tool is used. The cleaning tool is not particularly limited as long as it is used for skin cleaning, and may be appropriately selected according to the purpose, and examples thereof include nylon towels and cotton towels.

The anionic surfactant of the component (A) is (a1) palmitate (hereinafter sometimes referred to as "component (a1)") and (a2) stearate (hereinafter referred to as "component (a2)") It contains at least one selected from).

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

-Higher Fatty Acids-

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 salt and the (a2) stearic acid salt, and can be appropriately selected according to the purpose. For example, laurate, myristate, etc. are mentioned. These may be used individually by 1 type, and may use 2 or more types together. Among these, higher fatty acid salts containing all of palmitate, stearate, laurate, and myristic acid salt are preferable 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 according to the purpose, and 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 according to the purpose, and examples thereof include sodium salt and potassium salt.

The amine salt is not particularly limited and can be appropriately selected according to the purpose, and examples thereof include ammonium salts; Alkanolamine salts, such as a monoethanolamine salt, a diethanolamine salt, a triethanolamine salt, 2-amino-2-methylpropanol, and 2-amino-2-methylpropanediol, etc. are mentioned.

The amino acid salt is not particularly limited and can be appropriately selected according to the purpose, and 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 salts, those synthesized appropriately may be used, or commercially available products may be used.

Commercially available products of the higher fatty acid salts include, for example, Nonsal PK-1 (potassium palmitate, manufactured by NOF CORPORATION), Nonsal SK-1 (potassium stearate, manufactured by NOF CORPORATION), and NIKKOL potassium laurate LK-120 as trade names. (Potassium laurate, manufactured by Nikko Chemicals Co., Ltd.), NIKKOL potassium myristate MK-140 (potassium myristate, manufactured by Nikko Chemicals Co., Ltd.), TYSOF MNK-40 (coconut oil fatty acid potassium, myristin Acid potassium blending liquid, Nikko Chemicals Co., Ltd. make), etc. are mentioned.

Although the higher fatty acid salt can be blended as a higher fatty acid salt, the higher fatty acid salt and a salt that becomes a counter ion such as potassium hydroxide may be separately added to a mixing tank and neutralized to form a higher fatty acid salt.

As the higher fatty acid used for preparation of the higher fatty acid salt, an appropriately synthesized one may be used, or a commercial product may be used.

Commercially available products of the above-mentioned higher fatty acids include, for example, NAA (registered trademark) -160 (palmitic acid, manufactured by NOF CORPORATION), NAA (registered trademark) -180 (stearic acid, manufactured by NOF CORPORATION), and NAA (registered trademark) as trade names. -122 (lauric acid, manufactured by NOF CORPORATION), NAA (registered trademark) -142 (myristic acid, manufactured by NOF CORPORATION), and the like.

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

The content of the (a2) stearate is not particularly limited and can be appropriately selected according to the purpose, but is preferably 0.1% by mass to 3% by mass, and more preferably 0.2% by mass to 1% by mass, based on the total amount of the liquid skin cleanser composition. do.

The content of the laurate is not particularly limited and can be appropriately selected according to the purpose, but is preferably 3% by mass to 12% by mass, and more preferably 7% by mass to 10% by mass with respect to the total amount of the liquid skin cleanser composition.

The content of the myristate is not particularly limited and can be appropriately selected according to the purpose, but is preferably 3% by mass to 14% by mass, and more preferably 8% by mass to 14% by mass with respect to the total amount of the liquid skin cleanser composition.

-Polyoxyethylene alkyl ether sulfate-

The polyoxyethylene alkyl ether sulfate in the component (A) is not particularly limited and can be appropriately selected according to the purpose, and examples thereof include compounds represented by the following general formula (A1). The said polyoxyethylene alkyl ether sulfate may be used individually by 1 type, and may use 2 or more types together.

In the general formula (A1), R ¹ represents an alkyl group, and the number of carbon atoms in the alkyl group portion is preferably 10 to 14.

In the general formula (A1), n represents the average number of added moles of ethylene oxide (E.O.), and the average number of added moles of ethylene oxide is preferably 1 to 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 according to the purpose, and 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 (alias: POE (2) sodium laureth sulfate), polyoxyethylene ( 3) Sodium lauryl ether sulfate (alias: POE (3) sodium laureth sulfate), polyoxyethylene (4) sodium lauryl ether sulfate, polyoxyethylene (5) sodium lauryl ether sulfate, polyoxyethylene (3) Alkyl (C12,13) ether sodium sulfate, polyoxyethylene (2) lauryl ether ammonium sulfate, polyoxyethylene (3) lauryl ether ammonium sulfate, and the like.

In addition, the numerical value in ( ) above represents the average number of added moles (n) of ethylene oxide (E.O.).

As the polyoxyethylene alkyl ether sulfate, an appropriately synthesized one may be used, or a commercial item may be used.

Commercially available products of the polyoxyethylene alkyl ether sulfate include, for example, Texapon (registered trademark) N70 (manufactured by BASF Corp., sodium polyoxyethylene (2) lauryl ether sulfate) and Shinorin SPE-1250 as trade names. (Shinnippon Rica Co., Ltd. product, polyoxyethylene (2) sodium lauryl ether sulfate) etc. are mentioned.

-Ether Carboxylate-

The ether carboxylate in the component (A) is not particularly limited and can be appropriately selected according to the purpose, and examples thereof include compounds represented by the following general formula (A2) or (A3). The said ether carboxylate may be used individually by 1 type, and may use 2 or more types together.

In the general formulas (A2) and (A3), R ² represents a straight or branched alkyl or alkenyl group having 5 to 23 carbon atoms, or a phenyl group substituted with a straight or branched chain alkyl or alkenyl group having 5 to 23 carbon atoms. As carbon number of the said R ^<2> moiety shown, 10-14 are preferable.

In the general formula (A2), R ³ may be the same or different, and represents an alkylene group having 2 to 4 carbon atoms, and preferably has 2 carbon atoms.

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

In the general formulas (A2) and (A3), M ¹ 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. can be heard

In addition, the numerical value in the above ( ) represents the average added mole number (o) of alkylene oxide.

As the ether carboxylate, an appropriately synthesized one may be used, or a commercial product may be used.

As a commercial product of the said ether carboxylate, for example, as a trade name, Enadicol EC-30 (made by Lion Specialty Chemicals Co., Ltd., polyoxyethylene (3) lauryl ether sodium acetate), Beurite LCA-25F (Polyoxy Ethylene (3) Lauryl Ether Sodium Acetate), Beurite LCA-30D (Polyoxyethylene (3) Lauryl Ether Sodium Acetate), Beurite LCA-H (Polyoxyethylene (4) Lauryl Ether Acetic Acid), Beurite LCA-25NH (laureth-4carboxylic acid), Beurite SHAA (sodium lauryl glycol carboxylate), Beurite LCA (sodium polyoxyethylene (3) lauryl ether acetate) (above, Sanyo Kasei Kogyo Co., Ltd.) Kaokipo RLM-45NV (sodium polyoxyethylene (4.5) lauryl ether acetate), Kaoakipo RLM-100NV (polyoxyethylene (10) sodium lauryl ether acetate) (above, Kao Co., Ltd.) ) and the like.

In addition, the numerical value in the above ( ) represents the average added mole number (o) of alkylene oxide.

-Amino acid surfactant-

The amino acid-based surfactant in the component (A) is not particularly limited and can be appropriately selected according to the purpose, and examples thereof include compounds represented by the following general formula (A4). The above amino acid surfactants may be used alone or in combination of two or more.

In the general formula (A4), R ⁴ represents a straight-chain or branched alkyl or alkenyl group having 5 to 23 carbon atoms or a phenyl group substituted with a linear or branched-chain alkyl or alkenyl group having 5 to 23 carbon atoms. As carbon number of the said R ^<4> moiety, 8-18 are preferable.

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

In the 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 above general formula (A4), m and n may be the same or different and represent a number from 0 to 20.

In the 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 surfactant is not particularly limited and can be appropriately selected according to the purpose, but glycine, glutamic acid, and methylalanine are preferable.

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

As the amino acid-based surfactant, those synthesized appropriately may be used, or commercially available products may be used.

Examples of commercially available products of the amino acid-based surfactant include Amylite (registered trademark) GCK-11 (N-coconut oil fatty acid acylglycine potassium) and Amirite (registered trademark) GCK-12K (N-coconut oil fatty acid acylglycine potassium) as trade names. ), Amirite (registered trademark) GCS-12K (sodium acylglycine of N-coconut oil fatty acid), Amirite (registered trademark) GCS-11 (sodium acylglycine of N-coconut oil fatty acid), Amisoft (registered trademark) CS-11 ( N-myristoyl-L-sodium glutamate), Amisoft (registered trademark) CS-22 (N-coconut oil fatty acid acyl-L-sodium glutamate), Amisoft (registered trademark) LS-11 (N-lauroyl- L-sodium glutamate), Amisoft (registered trademark) MS-11 (N-myristoyl-L-sodium glutamate), Amisoft (registered trademark) HS-11P (N-stearoyl-L-sodium glutamate), Amisoft (registered trademark) HS-11P(F) (N-stearoyl-L-sodium glutamate), Amisoft (registered trademark) HS21 (N-stearoyl-L-glutamate disodium), Amylight (registered trademark) Trademark) ACS-12 (cocoylalanine sodium) (above, manufactured by Ajinomoto Healthy Supply Co., Ltd.), Aminosurfact (registered trademark) AMMS-P1 (N-myristoyl-L-sodium glutamate) (Asahi Kasei Chemicals Corporation) agent), NIKKOL salcosinate MN (sodium myristoylmethylamino acetate), NIKKOL alaninate LN-30 (sodium lauroylmethyl-β-alanine) (above, manufactured by Nikko Chemicals Co., Ltd.), aranone ACE (coconut oil fatty acid sodium methylalanine), Aranone AME (sodium myristoylmethyl-β-alanine), Aranone ALE (sodium lauroylmethyl-β-alanine) (above, manufactured by Kawa Ken Fine Chemical Co., Ltd.) , Enadicol L-30AN (sodium lauroylmethyl-β-alanine) (manufactured by Lion Specialty Chemicals Co., Ltd.), Softilt AT-L (sodium lauroylmethyl-β-alanine) (manufactured by NOF Corporation), etc. can be heard

The content of the anionic surfactant in the component (A) is 10% by mass to 25% by mass with respect to the total amount of the liquid skin cleanser composition in terms of foam retention, skin elasticity after towel drying, and low-temperature stability, but 12% by mass -20% by mass is preferred. If the content of the component (A) is less than 10% by mass, foam retention becomes insufficient, and if it exceeds 25% by mass, elasticity of the skin after towel drying and stability at low temperatures become insufficient.

In addition, the mass ratio [((a1)+(a2))/(A)] of the total content of the palmitate (a1) and the stearate (a2) to the content of the component (A) is not particularly limited. , can be appropriately selected depending on the purpose, but is preferably 0.1 to 0.5, and more preferably 0.15 to 0.3 from the viewpoints of foam retention, skin elasticity after towel drying, and low-temperature stability. When [((a1)+(a2))/(A)] is 0.1 or more, foam retention is good, and when it is 0.5 or less, skin elasticity and low-temperature stability after towel drying are good.

<(B) cationic polymer>

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

The dimethyldiallylammonium chloride-acrylic acid copolymer in the component (B) is represented by the following general formula (B1).

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

Among the components (B), the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is preferably 65 mol% or more from the viewpoint of skin elasticity after towel drying, 96 mol% or more is more preferable.

The above dimethyldiallylammonium chloride-acrylic acid copolymer may be used alone or in combination of two or more.

Among the components (B), the molar ratio of structural units in the dimethyldiallylammonium chloride-acrylic acid copolymer can be determined by measuring by nuclear magnetic resonance (NMR) under the following measurement conditions.

[Measuring conditions]

Solvent: heavy water (D ₂ O)

Measuring device: JNM-LA300 (300 MHz, manufactured by Nippon Electronics Co., Ltd.)

The weight average molecular weight of the cationic polymer of the component (B) is not particularly limited and can be appropriately selected according to the purpose, but is preferably 10,000 to 1,000,000, and more preferably 15,000 to 450,000.

The weight average molecular weight of the cationic polymer of the component (B) is measured using, for example, the SEC-MALLS-RI system (measurement conditions: column: Tosoh Corporation TSKgel α series α-M column 30 cm, solvent: sodium nitrate 0.3 M aqueous solution).

The viscosity at 25°C of a solution containing 30% by mass to 44% by mass of the solid content of the cationic polymer of the component (B) is preferably 10 mPa s to 15,000 mPa s, more preferably 20 mPa s to 12,000 mPa s. do.

The said viscosity can be measured using, for example, a Brookfield viscometer LVF (manufactured by Brookfield Corporation).

An appropriately synthesized cationic polymer of the component (B) may be used, or a commercially available product may be used. As a commercial item of the cationic polymer of the said (B) component, the following etc. are mentioned as a brand name, for example.

MERQUAT 100 (ingredient name: dimethyldiallylammonium chloride polymer, manufactured by Nippon Lubrizol Co., Ltd., solid content of 39 mass% to 44 mass%, viscosity at 25 ° C.: 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. Spindle No. Using the rotor of 3, it can measure on the condition of 6 revolutions/minute.

Mercoat 106 (ingredient name: dimethyldiallylammonium chloride polymer, manufactured by Nippon Lubrizol Co., Ltd., solid content of 30% by mass to 36% by mass, viscosity at 25°C: 20mPa s to 65mPa s, weight average molecular weight 15,000) .

The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. Spindle No. 1 can be used and the measurement can be made under the condition of 60 revolutions/minute.

Mercoat 280 (ingredient name: dimethyldiallylammonium chloride-acrylic acid copolymer, manufactured by Nippon Lubrizol Co., Ltd., solid content of 39 mass% to 43 mass%, viscosity at 25 ° C.: 3,000 mPa s to 6,000 mPa s, Weight average molecular weight 450,000, n:m = 35:65 (molar ratio) in the above 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. Spindle No. Using the rotor of 4, it can measure on the condition of 60 revolutions/minute.

Mercourt 295 (ingredient name: dimethyldiallylammonium chloride-acrylic acid copolymer, manufactured by Nippon Lubrizol Co., Ltd., solid content of 35 mass% to 40 mass%, viscosity at 25° C.: 3,500 mPa s to 9,000 mPa s, Weight average molecular weight 190,000, n:m = 5:95 (molar ratio) in the above 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. Spindle No. Using the rotor of 4, it can measure on the condition of 30 revolutions/minute.

Among these, as the cationic polymer of the component (B), in view of skin elasticity after towel drying, Mercury 100, Mercury 280, and Mercury 295 are preferable.

The content of the cationic polymer of the component (B) is not particularly limited and can be appropriately selected according to the purpose, but in terms of foam retention, skin elasticity after towel drying, and skin smoothness during rinsing, a liquid skin cleanser composition 0.1 mass % - 1 mass % are preferable with respect to the whole quantity, and 0.2 mass % - 0.8 mass % are more preferable. When the content of the 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 does not feel tight after towel-drying.

<(C) polyethylene glycol>

Polyethylene glycol as the 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.

When the average molecular weight of the component (C) exceeds 630, elasticity of the skin after towel drying decreases. In addition, commercially available products of polyethylene glycol having an average molecular weight of less than 190 do not exist.

The average molecular weight can be measured by the average molecular weight test described in the Quasi-drug Raw Materials Standard 2006.

Examples of the polyethylene glycol of the 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) etc. are mentioned. These may be used individually by 1 type, and may use 2 or more types together. Among these, as the component (C), polyethylene glycol 400 (average molecular weight: 380 to 420) is preferable from the viewpoint of skin elasticity after towel drying and low-temperature stability.

In addition, depending on the product, for example, polyethylene glycol 200 may have # attached between the polyethylene glycol and the numerical value, such as polyethylene glycol # 200.

The content of polyethylene glycol in the component (C) is not particularly limited and can be appropriately selected according to the purpose, but from the viewpoint of elasticity of the skin after towel drying and low-temperature stability, it is 0.1% by mass to 1.0 with respect to the total amount of the liquid skin cleanser composition. Mass % is preferable, and 0.2 mass % - 0.8 mass % are more preferable. When the content of the component (C) is 0.1% by mass or more, the elasticity and low-temperature stability of the skin after towel drying are good, and when the content is 1.0% by mass or less, the low-temperature stability is good.

<Mass Ratio [(A)/(C)]>

The mass ratio [(A)/(C)] of the content of the component (A) to the content of the component (C) is 15 to 100 in terms of foam retention, skin elasticity after towel drying, and low-temperature stability. , 20 to 40 are preferable. If the mass ratio [(A)/(C)] is less than 15, foam retention becomes insufficient, and if it exceeds 100, skin elasticity and low-temperature stability after towel drying become insufficient.

<(D) Copolymer represented by the following general formula (1)>

The copolymer of the above component (D) is preferably contained in order to improve skin smoothness during rinsing.

The copolymer of the said component (D) is a copolymer represented by the following general formula (1).

However, in the above general formula (1), n, m, and z represent the molar ratio (mol%) of each structural unit, and 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 said general formula (1) is preferable from the point of skin smoothness at the time of rinsing.

The molar ratio of each structural unit in the copolymer of the component (D) can be determined by measuring by nuclear magnetic resonance (NMR) under the following measurement conditions.

[Measuring conditions]

Solvent: heavy water (D ₂ O)

Measuring device: JNM-LA300 (300 MHz, manufactured by Nippon Electronics Co., Ltd.)

The weight average molecular weight of the copolymer of component (D) is not particularly limited and can be appropriately selected according to the purpose, but is preferably 100,000 to 3,000,000, more preferably 100,000 to 1,600,000. The weight average molecular weight of the copolymer of the component (D) is, for example, SEC-MALLS-RI system (measurement conditions: column: Tosoh Corporation TSKgel α series α-M column 30 cm, solvent: sodium nitrate 0.3M aqueous solution ) can be measured.

The viscosity at 25°C of the copolymer solution having a solid content of 8% to 45% by mass in the copolymer of component (D) is not particularly limited and can be appropriately selected according to the purpose, but is 1,500 mPa·s to 16,000 mPa·s is preferred.

The said viscosity can be measured using, for example, a Brookfield viscometer LVF (manufactured by Brookfield Corporation).

As a copolymer of the said (D) component, what was synthesize|combined suitably may be used, and a commercial item may be used. As said commercial item, the following etc. are mentioned.

Mercoat 550PR (ingredient name: dimethylallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Co., Ltd., solid content of 8.8% to 9.8% by mass, viscosity at 25°C: 7,500 mPa s to 15,000 mPa s, weight average molecular weight: 1,600,000, n:m:z = 0:30:70 in the above general formula (1)). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. Spindle No. Using the rotor of 4, it can measure under the condition of 10 revolutions/minute.

Mercot 740 (ingredient name: dimethylallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Co., Ltd., solid content of 41% to 45% by mass, viscosity at 25° C.: 2,000 mPa s to 12,000 mPa s, weight average molecular weight: 120,000, n:m:z = 0:24:76 in the above general formula (1)). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. Spindle No. Using the rotor of 4, it can measure under the condition of 10 revolutions/minute.

Mercoat 3330PR (ingredient name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Co., Ltd., solid content of 10.2% by mass to 11.5% by mass, viscosity at 25°C: 1,000 mPa s to 6,000 mPa s, weight Average molecular weight: 1,500,000, n:m:z = 34:31:35 in the above general formula (1)). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. Spindle No. Using the rotor of 4, it can measure under the condition of 30 revolutions/minute.

Mercoat 3331PR (ingredient name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Co., Ltd., solid content of 9.7% to 10.7% by mass, viscosity at 25°C: 2,000 mPa s to 12,000 mPa s, weight Average molecular weight: 1,600,000, n:m:z = 22.5:26.5:51 in the above general formula (1)). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. Spindle No. Using the rotor of 5, it can measure under the condition of 30 revolutions/minute.

Mercoat 3940 (ingredient name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Co., Ltd., solid content: 41% by mass to 45% by mass, viscosity at 25°C: 1,500 mPa s to 4,500 mPa s, weight Average molecular weight: 150,000, n:m:z = 31:29:40 in the above general formula (1)). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. Spindle No. Using the rotor of 3, it can measure under the condition of 10 revolutions/minute.

Among these, as a copolymer of the said (D) component, Mercoat 740 is preferable from the point of skin smoothness at the time of a rinse.

As content of the copolymer of the said (D) component, 0.01 mass % - 0.5 mass % is preferable with respect to the said liquid skin cleanser composition whole amount from the point of the smoothness of skin at the time of rinsing, and the tightening feeling of skin after towel drying, and it is 0.05 Mass % - 0.3 mass % are more preferable. When the content of the component (D) is 0.01% by mass or more, the smoothness of the skin during rinsing is good, and when it is 0.5% by mass or less, the skin feels good after towel drying.

<Other ingredients>

In the liquid skin cleanser composition, in addition to the components of (A), (B), (C), and (D), as necessary within a range not impairing the effects of the present invention, other Ingredients can be combined.

Examples of the other components include surfactants other than component (A), water-soluble polymers, oils, silicones, alcohols, lanolin derivatives, protein derivatives, drugs other than component (B) and component (D) ( For example, vitamins, etc.), moisturizers, bactericides, preservatives, pH adjusters, antioxidants, metal sequestering agents, UV absorbers/scattering agents, animal and plant extracts or their derivatives, chelating agents, UV absorbers/scattering agents, amino acids, pigments , perfumes, 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 component include plant oils and oils such as castor oil, olive oil, cacao oil, hardened palm oil, camellia oil, coconut oil, wood wax, jojoba oil, grapeseed oil, and avocado oil, and ester compounds thereof; animal fats and oils such as mink oil and egg yolk oil; waxes such as beeswax, spermaceti, 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, and behenic acid; Glycerol tri-2-ethylhexanoic acid ester, 2-ethylhexylstearate, butyl stearate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, octyldodecyl oleate, cholesterol oleate, etc. Ester etc. are mentioned. These may be used individually by 1 type, and may use 2 or more types together.

The content of the oil component is not particularly limited as long as the effect of the present invention is not impaired, and can be appropriately selected according to the purpose, but is preferably 0.1% by mass to 3% by mass based on the total amount of the liquid skin cleanser composition.

Examples of the 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. etc. can be mentioned. These may be used individually by 1 type, and may use 2 or more types together.

The content of the alcohols is not particularly limited as long as the effects of the present invention are not impaired, and can be appropriately selected according to the purpose, but is preferably 0.1% by mass to 3% by mass based on the total amount of the liquid skin cleanser composition.

Examples of the moisturizing agent include isoprene glycol, 1,2-pentanediol, diethylene glycol, diethylene glycol monoalkyl ether, polypropylene glycol, polypropylene glycol, hydrogenated castor oil (30E.O.), diglycerin, and triglyceride. Glycerin, polyglycerol, etc. are mentioned. These may be used individually by 1 type, and may use 2 or more types together.

The content of the alcohols is not particularly limited as long as the effect of the present invention is not impaired, and can be appropriately selected according to the purpose, but is preferably 0.1% by mass to 10% by mass based on the total amount of the liquid skin cleanser composition.

Examples of the preservative include benzoate, sorbate, dehydroacetate, paraoxybenzoic acid ester, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, 3,4,4'-trichloro Locarbaniride, benzalkonium chloride, hinokitiol, resorcin, methylchloroisothiazolinone/methylisothiazolinone solution (trade name: Kayson CG, manufactured by Rohm and Haas Japan), salicylic acid, pentanediol, phenoxyethanol, ethanol etc. can be mentioned. These may be used individually by 1 type, and may use 2 or more types together.

The content of the preservative is not particularly limited as long as the effect of the present invention is not impaired, and can be appropriately selected according to the purpose, but is preferably 0.1% by mass to 1% by mass based on the total amount of the liquid skin cleanser composition.

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 the effect of the present invention is not impaired, and may be appropriately selected according to the purpose, but is preferably 0.1% by mass to 1% by mass based on the total amount of the liquid skin cleanser composition.

Examples of the chelating agent include disodium edetate, ethylenediamine tetraacetate, 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 the effect of the present invention is not impaired, and can be appropriately selected according to the purpose, but is preferably 0.1% by mass to 1% by mass based on the total amount of the liquid skin cleanser composition.

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

Examples of the above 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, oh rotic acid and derivatives thereof; and the like. 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 the effects of the present invention are not impaired, and can be appropriately selected according to the purpose, but is preferably 0.001% by mass to 0.5% by mass based on the total amount of the liquid skin cleanser composition.

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. can 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 the effect of the present invention is not impaired, and can be appropriately selected according to the purpose, but is preferably 0.001% by mass to 0.5% by mass based on the total amount of the liquid skin cleanser composition.

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 can be appropriately selected according to the purpose, but is preferably 9.5 to 11.0 and more preferably 9.8 to 10.6.

The pH can be measured using, for example, 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 depending on the container to be used, but is preferably 4 mPa·s to 40 mPa·s, and more preferably 8 mPa·s to 30 mPa·s. .

For example, when using a pump foamer container capable of discharging bubbles by pushing down the nozzle part and a porous membrane body of 305 mesh and 200 mesh respectively, the viscosity of the liquid skin cleanser composition under the temperature conditions used is 30 mPa·s or less is preferable, and 25 mPa·s or less is more preferable.

The viscosity was measured using, for example, a BM-type viscometer (manufactured by Tokyo Keiki Co., Ltd.) at a sample temperature of 25°C, a rotation speed of 60 rpm, and No. It can be measured by measuring the viscosity after 1 minute with the rotor of No. 1.

-courage-

The liquid skin cleanser composition is of a type that is filled in a foamer container and discharged in the form of bubbles.

The foamer container is not particularly limited and can be appropriately selected from known foamer containers, and examples thereof include a non-gas type bubble discharge container, an aerosol container using a propellant and a pressure-resistant container, and the like. Among these, a non-gas type bubble discharge container is preferable.

The non-gas type bubble discharge container is not particularly limited as long as the liquid skin cleanser composition can be mixed with air and discharged in a foamed state, and can be appropriately selected according to the purpose. A squeeze former container capable of discharging bubbles by squeezing, a pump former container capable of discharging bubbles by pushing down a nozzle portion, and the like are exemplified. As such a former container, those manufactured by Daiwa Seikan Co., Ltd., manufactured by Yoshino Kogyosho Co., Ltd., and the like can be used. More specifically, as the former container, a former container described in Japanese Unexamined Patent Publication No. 7-315463, Japanese Unexamined Patent Publication No. Hei 8-230961, Japanese Unexamined Patent Publication No. 2005-193972, etc. can be used.

The non-gas type bubble discharge container has a bubble-forming member, specifically, has a porous film body for forming bubbles (preferably a plastic material such as nylon, polyester, or polyolefin), and the liquid skin cleanser composition described above. Bubbles are formed by passing through this porous membrane body.

The mesh of the porous membrane body is not particularly limited and can be appropriately selected according to the purpose, but preferably 100 mesh or more, more preferably 100 mesh to 400 mesh, and particularly preferably 200 mesh to 305 mesh.

In addition, the number of the porous membrane body is not particularly limited and can be appropriately selected according to the purpose, but from the viewpoint of improving the foaming performance, 2 to 4 sheets are preferable.

-Manufacturing method-

The method for producing the liquid skin cleanser composition is not particularly limited, and may be appropriately selected according to the purpose. For example, the (A) component, the (B) component, and the (C) component, as necessary, It can obtain by mixing the said (D) component, the said other component, and purified water (blending as a residual amount so that the whole liquid skin cleanser composition may be 100 mass %).

Specifically, after dissolving the component (A) in purified water heated to 70 ° C. to 80 ° C., cooling to 40 ° C. or lower, the component (B), the component (C), and, if necessary, the component (D ) component and the above other components can be added and manufactured.

You may prepare the said liquid skin cleanser composition using an apparatus. The device is not particularly limited and can be appropriately selected according to the purpose, and examples thereof include a stirring device having a shear force and having a stirring blade capable of mixing the whole.

There is no restriction|limiting in particular as said stirring blade, It can select suitably according to the purpose, For example, a propeller, a turbine, a disper, etc. are mentioned.

-Usage-

The use site of the liquid skin cleanser composition is not particularly limited and can be appropriately selected according to the purpose, and can be used for the whole body, face, hands, etc., for example.

The use of the liquid skin cleanser composition is not particularly limited and can be appropriately selected according to the purpose, but it is excellent in foam retention, does not feel tightness on the skin after towel drying, smoothness of the skin during rinsing and skin after towel drying has good elasticity and excellent low-temperature stability, so it can be used, for example, in body shampoo, body soap, face wash foam, hand soap, foam hand soap, cleansing foam, cleanser, etc., in particular, nylon towels or cotton towels, etc. It can be used suitably for body soap that is used by lathering with the cleansing utensils of the above.

Example

The present invention will be specifically described below by way of Examples and Comparative Examples, but the present invention is not limited to these Examples at all.

The content of each component described in Examples and Comparative Examples is expressed as "% by mass", the total amount is 100% by mass, and all are values obtained in terms of pure parts. In addition, the mass ratio [(C)/(A)] of the content (mass%) of (A) component to the content (mass%) of (C) component [(C)/(A)] is rounded off to one decimal place, and up to, and recorded. 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 )] rounds off the third decimal place, obtains up to two decimal places, and writes.

(Examples 1 to 11 and 19 to 32, and Comparative Examples 1 to 10)

The liquid skin cleanser composition of the composition and content shown in following Table 1 - Table 5 was prepared according to the following method.

After warming the purified water to 70 ° C. to 80 ° C., dissolving the anionic surfactant of component (A), cooling to 40 ° C. or less, the cationic polymer of component (B) or the cation of the comparative component of component (B) Cellulose and polyethylene glycol as component (C) or a comparative component of component (C) were added. The said purified water used the quantity used as 95 mass % of the liquid skin cleanser composition finally obtained. After that, if the pH is less than the predetermined pH (pH10.0), potassium hydroxide, a common ingredient, is added, and after adjusting the predetermined pH to 10.0, the common ingredients, lauric acid amide propyl betaine, propylene glycol, and fragrance are added. Then, purified water was added so that the total amount was 100% by mass, and each liquid skin cleanser composition of Examples 1 to 11 and 19 to 32 and Comparative Examples 1 to 10 was obtained.

In addition, when preparing each said liquid skin cleanser composition, it stirred using the three-one motor (HEIDON BL1200, Shinto Chemical Co., Ltd. make) using the propeller as a stirring blade. In addition, pH was measured at 25 degreeC using the pH meter (HM-30R, made by TOA DKK).

(Examples 12 to 18)

The liquid skin cleanser composition of the composition and content shown in following Table 2 and Table 3 was prepared according to the following method.

In preparing the liquid skin cleanser compositions of Examples 1 to 11 and 19 to 32, the anionic surfactant of component (A) was dissolved, and the cationic polymer of component (B) and polyethylene glycol of component (C) were added. When preparing, each liquid skin cleanser composition of Examples 12 to 18 was obtained in the same manner as in the preparation method of the liquid skin cleanser composition of Examples 1 to 11 and 19 to 32, except that the copolymer of component (D) was also added. .

Each liquid skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 10 obtained was filled into a container with a foamer pump dispenser (discharge amount: 3 mL, manufactured by Yoshino Kogyosho Co., Ltd.), and used for the following evaluation.

Regarding each liquid skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 10, as follows, "foam retention", "skin smoothness during rinsing", "skin elasticity after towel drying", "towel Skin tightness after drying" and "low-temperature stability" were evaluated and judged. The results are shown in Tables 1 to 5 below.

<keep foam>

Ten expert evaluators took 2 pushes (about 6 g) of each liquid skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 10 on a nylon towel (Awaster Body Towel Soft, manufactured by Kikuron), and washed the whole body with " Foam retention" was observed and evaluated based on the following evaluation criteria. The result was determined by obtaining the average rating value of the above 10 professional raters, and based on the following evaluation criteria for the average rating value.

-Evaluation criteria for "bubble retention"-

4 points: By the time you finish washing your body, most of the foam on your body at the beginning of washing remains.

3 points: After washing the body, about 80% to 50% of the foam remaining on the body at the beginning of washing

2 points: After washing the body, about 20% to 40% of the foam remaining on the body at the beginning of washing

1 point: By the time the body is finished washing, almost no foam remains on the body at the beginning of washing

-Judgment criteria of "foam retention"-

◎: The average rating is 3.5 or more and 4.0 or less

○: The average rating value is 3.0 or more and less than 3.5

△: Average rating value is 2.0 or more and less than 3.0

×: The average score is less than 2.0 points

<Skin smoothness at the time of rinsing>

10 expert evaluators took 5 pushes (about 15 g) of each liquid skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 10 in their hands, washed their whole body with their hands, and then rinsed with warm water at 40 ° C. The smoothness of the skin of the city" was evaluated based on the following evaluation criteria. The result was determined by obtaining the average rating value of the above 10 professional raters, and based on the following evaluation criteria for the average rating value.

-Evaluation criteria of "skin smoothness at the time of rinsing"-

4 points: I strongly feel the smoothness on the skin

3 points: I feel smoothness on the skin

2 points: Somewhat smoothness is felt on the skin

1 point: I do not feel smoothness on skin

-Judgment criteria of "skin smoothness at the time of rinsing"-

◎: The average rating is 3.5 or more and 4.0 or less

○: The average rating value is 3.0 or more and less than 3.5

△: Average rating value is 2.0 or more and less than 3.0

×: The average score is less than 2.0 points

<Skin elasticity after towel drying>

10 expert 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 with their hands, rinsed with warm water at 40 ° C, and towel dried. . Thereafter, after stabilizing for 30 minutes in a constant temperature room at 24°C, "skin elasticity after towel drying" was evaluated based on the following evaluation criteria. The result was determined by obtaining the average rating value of the above 10 professional raters, and based on the following evaluation criteria for the average rating value.

-Evaluation criteria for "skin elasticity after towel drying"-

4 points: Strong feeling of skin movement when pressing the forearm with the palm of the hand

3 points: Feeling the skin move when pressing the forearm with the palm of the hand

2 points: When the forearm is pressed with the palm of the hand, a feeling of movement of the skin is slightly felt.

1 point: When the forearm is pressed with the palm, the skin does not feel the movement.

-Judgment criteria for "skin elasticity after towel drying"-

◎: The average rating is 3.5 or more and 4.0 or less

○: The average rating value is 3.0 or more and less than 3.5

△: Average rating value is 2.0 or more and less than 3.0

×: average score is less than 2.0 points

<Skin tightness after towel drying>

10 expert 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 with their hands, rinsed with warm water at 40 ° C, and towel dried. . Thereafter, after stabilizing for 30 minutes in a constant temperature room at 24°C, "skin tension after towel drying" was evaluated based on the following evaluation criteria. The result was determined by obtaining the average rating value of the above 10 professional raters and based on the following criteria for rating average value.

-Evaluation Criteria for "Skin Tightness After Towel Drying"-

4 points: I do not feel any tightening of the skin at all.

3 points: I feel a slight tightening of the skin

2 points: Feel the tightening of the skin considerably

1 point: feel very tight skin

-Judgment criteria for "skin tightness after towel drying"-

◎: The average rating is 3.5 or more and 4.0 or less

○: The average rating value is 3.0 or more and less than 3.5

△: Average rating value is 2.0 or more and less than 3.0

×: The average score is less than 2.0 points

<Low Temperature Stability>

About 50 g of each liquid skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 10 was placed in a cylindrical transparent glass bottle (diameter 4 cm, height 7.5 cm), and stored in a -5°C thermostat for 2 weeks. A professional panelist visually observed the formation state of the precipitate of the liquid skin cleanser composition after storage for 2 weeks, and evaluated based on the following evaluation criteria.

-Judgment criteria of "low-temperature stability"-

◎: No precipitation of crystals or solids was confirmed within 2 weeks

○: Precipitation of crystals or solids was hardly confirmed within 2 weeks (no problem in terms of product value)

×: Confirmation of precipitation of a large amount of crystals or solids 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: 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 feel tight on the skin after towel drying, has good skin smoothness during rinsing and good skin elasticity after towel drying, In addition, since it has excellent low-temperature stability, it can be used, for example, in body shampoo, body soap, face wash foam, hand soap, foam hand soap, cleansing foam, cleanser, etc. It can be used suitably for body soap that is used after making bubbles.

Claims (4)

(A) (a1) an anionic surfactant containing at least one selected from palmitate and (a2) stearate;
(B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer;
(C) containing polyethylene glycol having an average molecular weight of 190 to 630;
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 characterized in that it is filled in a foamer container. According to claim 1,
(D) A liquid skin cleanser composition further containing 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, said z is 35-76. According to claim 1 or 2,
Liquid skin whose mass ratio [((a1)+(a2))/(A)] of the total content of the (a1) palmitate and the (a2) stearate to the content of the component (A) is 0.1 to 0.5 detergent composition. According to any one of claims 1 to 3,
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 liquid skin cleanser composition whose content of the said (D) component is 0.05 mass % - 0.3 mass %.