KR20240026877A - Liquid skin cleanser composition - Google Patents

Abstract

It contains (A) an anionic surfactant, (B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer, and (C) potassium phosphate salt, The molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 40% or more, and the mass ratio of the content of the component (B) to the content of the component (C) [ (B)/(C)] is 0.2 or more and 8.0 or less, and is a liquid skin cleanser composition characterized by being filled in a foamer container.

Description

Liquid skin cleanser composition

The present invention relates to liquid skin cleanser compositions.

Conventionally, liquid skin cleanser compositions such as hand soap and body soap are required to have good foaming properties such as foam retention and to provide a moisturizing feeling to the skin after washing. In addition, while most consumers included liquid body soap in cleaning tools such as nylon towels or cotton towels to cleanse their bodies, recently, foamy body soap discharged from a foamer container has been included in cleaning tools to cleanse the body. Demand for cleaning applications is increasing. When washing the body using a discharged foamy body soap in a cleansing tool, the foaming performance (fastness and density of the foam) and the moisturizing feeling of the skin after washing were not fully satisfactory.

For the purpose of providing a good skin feel (moisture, smoothness, etc.) after washing and good foaming performance, a liquid skin cleanser composition containing a fatty acid salt and a cationic polymer with structural units derived from dimethyl diallylammonium chloride has been proposed. (For example, see Patent Document 1). However, the liquid skin cleanser composition in the above proposal is different from the foaming speed and density of the foam when foamed using a cleansing tool such as a nylon towel or cotton towel, the feeling of moisture on the skin after towel drying, and the foamer. The discharge performance from the container was not satisfactory.

It is generally known to add more fatty acids such as lauric acid, myristic acid, palmitic acid, and stearic acid in order to improve the foaming performance (fastness of foaming or denseness of foam), but the mixing ratio of fatty acids If the value is raised, there is a problem that the discharge performance from the foamer container deteriorates and the feeling of moisture on the skin after towel drying decreases.

Therefore, the feeling of moisture on the skin after towel drying, the absence of stickiness on the skin after towel drying, and the discharge ability from the foamer container, and the speed of foaming when washing with a body cleansing towel, and A liquid skin cleanser composition with excellent foam density has not yet been provided, and there is a strong demand for its rapid development.

International Publication No. 2019/097950

The present invention aims to solve the above-mentioned problems in the prior art and achieve the following objectives. That is, the feeling of moisture on the skin after towel drying, the absence of stickiness on the skin after towel drying, and the discharge ability from the foamer container, and the speed of foaming when washing with a body cleansing towel. The purpose is to provide a liquid skin cleanser composition with excellent foam density.

As a result of intensive study by the present inventors to achieve the above object, the liquid skin cleanser composition of the present invention contains (A) an anionic surfactant, (B) dimethyldiallylammonium chloride polymer, and dimethyldiallylammonium chloride-acrylic acid copolymer. It contains at least one cationic polymer selected from the polymer and (C) a potassium salt of phosphate, and the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is It is 40% or more, and the mass ratio [(B)/(C)] of the content of the component (B) to the content of the component (C) is 0.2 or more and 8.0 or less, and is filled in a foamer container, so that after towel drying, It has excellent moisturizing properties on the skin, no stickiness on the skin after towel drying, discharge from the foamer container, and quick and dense foam when washing with a body cleansing towel. discovered that

The present invention is based on the above findings by the present inventors, and means for solving the above problems are as follows.

<1> Contains (A) an anionic surfactant, (B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer, and (C) potassium phosphate salt. and the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 40% or more, and the content of the component (B) relative to the content of the component (C). It is a liquid skin cleanser composition whose mass ratio [(B)/(C)] is 0.2 or more and 8.0 or less, and is filled in a foamer container.

<2> The content of the component (A) is 10% by mass or more and 25% by mass or less based on the total amount of the liquid skin cleanser composition, and the content of the component (B) is 0.2% by mass or more and 0.8% by mass based on the total amount of the liquid skin cleanser composition. It is the liquid skin cleanser composition according to <1> above, wherein the content of the component (C) is 0.1% by mass or more and 1.0% by mass or less with respect to the total amount of the liquid skin cleanser composition.

<3> The liquid according to any one of <1> to <2>, wherein the (C) potassium phosphate salt is at least one selected from potassium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium tripolyphosphate, and potassium polyphosphate. It is a skin cleanser composition.

<4> The liquid skin cleanser composition according to any one of <1> to <3>, wherein the viscosity at 25°C is 5 mPa·s or more and 30 mPa·s or less.

According to the present invention, the above-mentioned object can be achieved by solving the above-mentioned problems in the related art, providing a feeling of moisture on the skin after towel drying, no stickiness on the skin after towel drying, and a foamer container. It is possible to provide a liquid skin cleanser composition that is excellent in discharge properties and foaming speed and foam density when cleansing using a body cleansing towel.

(liquid skin cleanser composition)

The liquid skin cleanser composition of the present invention comprises (A) an anionic surfactant, (B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer, and (C) Contains potassium phosphate salt and, if necessary, further contains other ingredients.

In addition, in this specification, the anionic surfactant (A) is "component (A)", (B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer. may be referred to as “(B) component” or “(B) cationic polymer,” and potassium phosphate (C) may be referred to as “(C) component.”

<(A) Anionic surfactant>

The (A) anionic surfactant is contained to improve the speed and density of foam when washing with a body cleaning towel.

In addition, in this specification, “the speed of foam when washing with a body washing towel” means “the speed of foaming”, and “the density of foam when washing with a body washing towel” means “foam”. There is a thing called “density.”

The anionic surfactant of component (A) is not particularly limited and can be appropriately selected depending on the purpose, for example, higher fatty acid salt, polyoxyethylene (POE) alkyl ether sulfate, ether carboxylate, amino acid-based surfactant. etc. can be mentioned. Among these, higher fatty acid salts are preferred because they improve the speed of foaming and the density of foam.

These may be used individually, or two or more types may be used together.

-Higher fatty acid salts-

The higher fatty acid salts are not particularly limited and can be appropriately selected depending on the purpose, and examples include laurate, myristate, palmitate, and stearate. Among these, higher fatty acid salts including any of laurate, myristate, palmitate, and stearate are preferred in terms of improving the speed of foaming and the density of foam.

These may be used individually, or two or more types may be used together.

The salt of the higher fatty acid salt is not particularly limited and can be appropriately selected depending on the purpose, and examples include alkali metal salts, amine salts, and amino acid salts.

The alkali metal salt is not particularly limited and can be appropriately selected depending on the purpose, and examples include sodium salt and potassium salt.

The amine salt is not particularly limited and can be appropriately selected depending on the purpose, for example, ammonium salt, monoethanolamine salt, diethanolamine salt, triethanolamine salt, 2-amino-2-methylpropanol, 2-amino- Alkanolamine salts such as 2-methylpropanediol, etc. can be mentioned.

The amino acid salt is not particularly limited and can be appropriately selected depending on the purpose, and examples include lysine salt and arginine salt.

Among these, alkali metal salts are preferable and potassium salts are more preferable.

The above higher fatty acid salts may be appropriately synthesized or commercially available products may be used.

The method of synthesizing the above-mentioned higher fatty acid salt is not particularly limited and can be appropriately selected depending on the purpose. For example, fatty acid salt obtained by a conventional method may be blended as is, and in the mixing process of the liquid skin cleanser composition, the higher fatty acid and A higher fatty acid salt may be synthesized by neutralizing an alkali such as potassium hydroxide in a mixing tank.

Commercially available products of the above-mentioned higher fatty acid salts include, for example, NIKKOL potassium laurate LK-120 (potassium laurate), NIKKOL potassium myristate MK-140 (potassium myrstate), and Taisof MNK-40 (coconut oil). Fatty acid potassium) (above, manufactured by Nikko Chemicals Co., Ltd.), Nonsal PK-1 (potassium palmitate), Nonsal SK-1 (potassium stearate) (above, manufactured by NOF CORPORATION), etc.

-Polyoxyethylene (POE) alkyl ether sulfate-

The polyoxyethylene alkyl ether sulfate is not particularly limited and can be appropriately selected depending on the purpose, and examples include compounds represented by the following general formula (A1).

The polyoxyethylene alkyl ether sulfate may be used individually or in combination of two or more types.

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

In the general formula (A1), n represents the average added mole number of ethylene oxide (E.O.), and the average added mole number of 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 depending on the purpose, and examples include sodium and potassium.

Specific examples of the polyoxyethylene alkyl ether sulfate include polyoxyethylene (1) lauryl ether sulfate sodium, polyoxyethylene (2) lauryl ether sulfate sodium (also known as POE (2) sodium laureth sulfate), and polyoxyethylene ( 3) Sodium lauryl ether sulfate (aka: POE (3) sodium laureth sulfate), polyoxyethylene (4) sodium lauryl ether sulfate, polyoxyethylene (5) sodium lauryl ether sulfate, polyoxyethylene (3) Examples include alkyl (C12,13) ether sodium sulfate, polyoxyethylene (2) lauryl ether ammonium sulfate, and polyoxyethylene (3) lauryl ether ammonium sulfate.

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

The polyoxyethylene alkyl ether sulfate may be appropriately synthesized or a commercially available product may be used.

Commercially available products of the polyoxyethylene alkyl ether sulfate include, for example, Texapon (registered trademark) N70 (sodium polyoxyethylene (2) lauryl ether sulfate) (manufactured by BASF Corp.), Shinorin SPE- 1250 (sodium polyoxyethylene (2) lauryl ether sulfate) (manufactured by Shin Nippon Rika Co., Ltd.), etc. can be mentioned.

-ether carboxylate-

The ether carboxylate is not particularly limited and can be appropriately selected depending on the purpose, and examples include compounds represented by the following general formula (A2) or (A3).

The said ether carboxylic acid salt may be used individually by 1 type, or 2 or more types may be used together.

In the above general formulas (A2) and (A3), R ⁸ is a straight-chain or branched alkyl group or alkenyl group having 5 to 23 carbon atoms, or a straight-chain or branched alkyl group having 5 to 23 carbon atoms, or a phenyl group substituted with an alkenyl group. , and the carbon number of the R ⁸ portion is preferably 10 to 14.

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

In the general formula (A2), o represents the average added mole number of alkylene oxide of 1 to 20, and the average added mole number of alkylene oxide 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 sodium polyoxyethylene (3) lauryl ether acetate, potassium polyoxyethylene (4) lauryl ether acetate, sodium lauryl glycol acetate, etc. can be mentioned.

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

The ether carboxylate may be appropriately synthesized or a commercially available salt may be used.

Commercially available products of the above-mentioned ether carboxylate include, for example, Enadicol EC-30 (sodium polyoxyethylene (3) lauryl ether acetate) (manufactured by Lion Specialty Chemicals Co., Ltd.) and Burite LCA-25F (polyoxyethylene (3) lauryl ether acetate). Sodium oxyethylene (3) lauryl ether acetate), Burite LCA-30D (Sodium polyoxyethylene (3) lauryl ether acetate), Burite LCA-H (Polyoxyethylene (4) lauryl ether acetate), View Light LCA-25NH (laureth-tetracarboxylic acid), Burite SHAA (sodium lauryl glycol carboxylate), Burite LCA (sodium polyoxyethylene (3) lauryl ether acetate) (above, approved by Sanyo Kasei High School) (manufactured by Shiki Kaisha), Kaoakipo RLM-45NV (sodium polyoxyethylene (4.5) lauryl ether acetate), Kaoakipo RLM-100NV (sodium polyoxyethylene (10) lauryl ether acetate) (above, Kao Kabushiki) Kaisha product), etc. can be mentioned.

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

-Amino acid surfactant-

The amino acid-based surfactant is not particularly limited and can be appropriately selected depending on the purpose, and examples include compounds represented by the following general formula (A4).

The amino acid-based surfactants may be used individually, or two or more types may be used in combination.

In the general formula (A4), R ¹⁰ represents a straight-chain or branched alkyl group having 5 to 23 carbon atoms, or an alkenyl group, or a phenyl group substituted with a straight-chain or branched alkyl group or an alkenyl group having 5 to 23 carbon atoms, The carbon number of the R ¹⁰ portion is preferably 8 to 18.

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

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

In the general formula (A4), m and n may be the same or different, and represent numbers 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-based surfactant is not particularly limited and can be appropriately selected depending on the purpose, but glycine, glutamic acid, and methylalanine are preferred.

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

The amino acid-based surfactant may be appropriately synthesized or a commercially available product may be used.

Commercially available products of the amino acid-based surfactant include, for example, Amirite (registered trademark) GCK-11 (N-coconut oil fatty acid acylglycine potassium) and Amylite (registered trademark) GCK-12K (N-coconut oil fatty acid acylglycine potassium). ), Amirite (registered trademark) GCS-12K (Sodium acylglycine N-coconut oil fatty acid), Amirite (Registered trademark) GCS-11 (Sodium acylglycine 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- Sodium L-glutamate), Amisoft (registered trademark) MS-11 (sodium N-myristoyl-L-glutamate), Amisoft (registered trademark) HS-11P (sodium N-stearoyl-L-glutamate), Amisoft (registered trademark) HS-11P(F) (sodium N-stearoyl-L-glutamate), Amisoft (registered trademark) HS21 (disodium N-stearoyl-L-glutamate), Amirite (registered) Trademark) ACS-12 (sodium cocoyl alanine) (above, manufactured by Ajinomoto Healthy Supply Co., Ltd.), Aminosurpact (registered trademark) AMMS-P1 (sodium N-myristoyl-L-glutamate) (Asahi Kasei Chemicals Corporation) NIKKOL Salcosinate MN (sodium myristoylmethylamino acetate), NIKKOL Araninate LN-30 (sodium lauroylmethyl-β-alanine) (above, manufactured by Nikko Chemicals Co., Ltd.), Aranone ACE (sodium palm oil fatty acid methylalanine), Aranone AME (sodium myristoylmethyl-β-alanine), Aranone ALE (sodium lauroylmethyl-β-alanine) (above, manufactured by Kawaken 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 mentioned.

The total content of the component (A) contained in the liquid skin cleanser composition of the present invention is not particularly limited and can be appropriately selected depending on the purpose, but it improves the speed of foaming and the density of foam, and the amount of component (A) contained in the liquid skin cleanser composition of the present invention is not particularly limited. In terms of improving discharge properties, the amount is preferably 8% by mass or more and 30% by mass or less, and more preferably 10% by mass or more and 25% by mass or less with respect to the total amount of the liquid skin cleanser composition.

If the total content of the component (A) is 8% by mass or more based on the total amount of the liquid skin cleanser composition, a liquid skin cleanser composition excellent in foaming speed and foaming density can be obtained.

If the total content of the anionic surfactant of the component (A) is 30% by mass or less based on the total amount of the liquid skin cleanser composition, a liquid skin cleanser composition with excellent discharge properties from the foamer container can be obtained.

<(B) Cationic polymer>

The (B) cationic polymer is at least one selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer, and can improve the feeling of moisture on the skin after towel drying.

The component (B) may be used individually, or two or more types may be used in combination.

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

In the general formula (B1), n and m represent the molar ratio (mol%) of each structural unit.

In the general formula (B1), m is 40 or more, and n and m satisfy the following formula (I).

n+m=100···Equation (I)

In the present invention, the molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 40 mol% or more. A liquid skin cleanser composition excellent in moisturizing sensation on skin after towel drying, as the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 40 mol% or more. can be obtained.

In addition, the molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 65 mol% or more from the viewpoint of improving the feeling of moisture on the skin after towel drying. It is preferable, and 95 mol% or more is more preferable.

The above-mentioned dimethyl diallylammonium chloride-acrylic acid copolymer may be used individually or in combination of two or more types.

The content of the above-mentioned (B) cationic polymer is not particularly limited and can be appropriately selected depending on the purpose, but since the moisturizing feeling on the skin after towel drying is improved, it is 0.1% by mass or more based on the total amount of the liquid skin cleanser composition. 1 mass % or less is preferable, and 0.2 mass % or more and 0.8 mass % or less are more preferable.

If the content of the component (B) is 0.1% by mass or more based on the total amount of the liquid skin cleanser composition, a liquid skin cleanser composition that has excellent moisturizing properties on the skin after towel drying can be obtained. If the content of the component (B) is 1% by mass or less based on the total amount of the liquid skin cleanser composition, a liquid skin cleanser composition that has excellent moisturizing properties on the skin after towel drying can be obtained.

The molar ratio of each structural unit in the dimethyldiallylammonium chloride-acrylic acid copolymer in the component (B) can be determined by measuring under the following measurement conditions by nuclear magnetic resonance (NMR).

[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 (B) cationic polymer is not particularly limited and can be appropriately selected depending on the purpose. However, from the viewpoint of moisturizing feeling on the skin after towel drying, it is preferably 10,000 to 1,000,000, and 15,000 to 450,000. It is more desirable.

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

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

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

The (B) cationic polymer may be an appropriately synthesized polymer or a commercially available polymer.

Commercially available products of the (B) cationic polymer include, for example, MERQUAT 100, MERQUAT 106, MERQUAT 280, and MERQUAT 295 (all manufactured by Lubrizol).

In addition, the composition and physical properties of each commercial product are shown below.

-Mercoat 100-

Composition (molar ratio) Acrylic acid: dimethyl diallylammonium chloride = 0:100

·Solid content 39% by mass to 44% by mass

· Viscosity at 25℃ 8,000mPa·s∼12,000mPa·s

·Weight average molecular weight 150,000

In addition, the above viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) and spindle No. 2 at 25°C. Using a rotor of 3, measurement can be made under the condition of 6 revolutions/minute.

-Murcott 106-

Composition (molar ratio) Acrylic acid: dimethyl diallylammonium chloride = 0:100

·Solid content 30% by mass to 36% by mass

· Viscosity at 25°C: 20 mPa·s to 65 mPa·s

·Weight average molecular weight 15,000

In addition, the above viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) and spindle No. 2 at 25°C. Using the rotor of 3, measurement can be made under the condition of 60 revolutions/minute.

-Mercott 280-

· Composition (molar ratio) Acrylic acid: dimethyl diallylammonium chloride = 35:65

·Solid content 39% by mass to 43% by mass

· Viscosity at 25°C: 3,000 mPa·s to 6,000 mPa·s

·Weight average molecular weight 450,000

In addition, the above viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) and spindle No. 2 at 25°C. Using a rotor of 4, measurement can be made under the condition of 30 revolutions/minute.

-Mercott 295-

· Composition (molar ratio) Acrylic acid: dimethyl diallylammonium chloride = 5:95

·Solid content: 35% by mass to 40% by mass

· Viscosity at 25°C: 3,500 mPa·s to 9,000 mPa·s

·Weight average molecular weight 150,000

In addition, the above viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) and spindle No. 2 at 25°C. Using a rotor of 4, measurement can be made under the condition of 30 revolutions/minute.

<(C) Phosphoric acid potassium salt>

The potassium phosphate salt of component (C) is contained to improve the speed of foaming.

The component (C) is not particularly limited and can be appropriately selected depending on the purpose, and examples include potassium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium tripolyphosphate, and potassium polyphosphate. Among these, potassium dihydrogen phosphate is preferable because it improves the speed of foaming.

The component (C) may be used individually, or two or more types may be used in combination.

The content of the component (C) above is preferably 0.05% by mass or more and 2.0% by mass or less based on the total amount of the liquid skin cleanser composition from the viewpoint of improving the speed of lathering and improving the feeling of moisture on the skin after towel drying. And, more preferably 0.1 mass% or more and 1.0 mass% or less.

If the content of the component (C) is 0.05% by mass or more based on the total amount of the liquid skin cleanser composition, a liquid skin cleanser composition with excellent foaming speed can be obtained. If the content of the component (C) is 2.0% by mass or less based on the total amount of the liquid skin cleanser composition, a liquid skin cleanser composition with a good moisturizing feeling on the skin after towel drying can be obtained.

As the component (C), an appropriately synthesized component may be used, or a commercially available product may be used.

The method for synthesizing the component (C) is not particularly limited and can be appropriately selected depending on the purpose. Examples include a method of synthesizing phosphoric acid by neutralizing it with potassium hydroxide or the like.

Examples of commercially available products of the component (C) include potassium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium tripolyphosphate, and potassium polyphosphate (above, manufactured by Taiheiyo Chemical Sangyo Co., Ltd.).

These may be used individually, or two or more types may be used together.

<Mass ratio [(B)/(C)]>

In the present invention, the mass ratio [(B)/(C)] of the content of the component (B) to the content of the component (C) is 0.2 or more and 8.0 or less.

When the mass ratio [(B)/(C)] is 0.2 or more, it is possible to obtain a liquid skin cleanser composition that has excellent moisturizing properties on the skin after towel drying.

When the mass ratio [(B)/(C)] is 8.0 or less, a liquid skin cleanser composition can be obtained that has no stickiness on the skin after towel drying and is excellent in foaming speed.

In addition, the mass ratio [(B)/(C)] of the content of the component (B) to the content of the component (C) refers to the feeling of moisture on the skin after towel drying and the stickiness on the skin after towel drying. In terms of improving the absence of noise and the speed of foaming, it is preferable that it is 0.4 or more and 4.0 or less, and it is more preferable that it is 0.4 or more and 1.4 or less.

<Other ingredients>

In addition to the component (A), component (B), and component (C), other components may be added to the liquid skin cleanser composition of the present invention as needed, as long as they do not impair the effect of the present invention. .

Examples of the other ingredients include surfactants other than component (A), water-soluble polymers other than component (B), oils, silicones, alcohols such as lower and higher alcohols, lanolin derivatives, protein derivatives, amino acids, and vitamins. Medicines such as disinfectants, moisturizers, preservatives, pH adjusters such as potassium hydroxide, citric acid, hydrochloric acid, antioxidants, metal blockers, ultraviolet ray absorbers, ultraviolet rays scattering agents, animal and plant extracts or their derivatives, chelating agents such as edetic acid, pigments , fragrances, pigments, inorganic powders, clay minerals, water-insoluble polymer compound powders such as nylon and polyethylene, etc.

These may be used individually, or two or more types may be used together.

The other components mentioned above may be appropriately synthesized or commercially available products may be used.

The content of the other components in the liquid skin cleanser composition is not particularly limited and can be appropriately selected depending on the purpose.

There is no particular limitation on the oil, and it can be appropriately selected depending on the purpose. For example, plant oils and oils such as castor oil, olive oil, cacao oil, hydrogenated palm oil, camellia oil, palm oil, wood wax, jojoba oil, grape seed oil, and avocado oil; These ester compounds, animal oils such as mink oil and egg yolk oil, beeswax, hard wax, lanolin, hydrogenated lanolin, carnauba wax, candelilla wax, etc., liquid paraffin, squalane, microcrystalline wax, ceresin wax, paraffin wax, Hydrocarbons such as petroleum jelly, natural and synthetic fatty acids such as oleic acid, isostearic acid, and behenic acid, glycerol tri-2-ethylhexanoic acid ester, 2-ethylhexyl stearate, butyl stearate, isopropyl myristate, and palpate. and esters such as isopropyl mitrate, octyldodecyl myristate, octyldodecyl oleate, and cholesterol oleate.

The content of the oil is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% by mass or more and 3% by mass or less.

The alcohols are not particularly limited and can be appropriately selected depending on the purpose, for example, natural and synthetic higher alcohols such as cetyl alcohol, oleyl alcohol, stearyl alcohol, hexyldecanol, octyldodecanol, and lauryl alcohol. etc. can be mentioned.

The content of the above alcohols is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% by mass or more and 10% by mass or less.

There is no particular limitation on the above-mentioned moisturizing agent, and it can be appropriately selected depending on the purpose. For example, isoprene glycol, 1,2-pentanediol, diethylene glycol, diethylene glycol monoalkyl ether, polypropylene glycol, hydrogenated castor oil (30E) .O.), diglycerin, triglycerin, polyglycerin, etc.

The preservative is not particularly limited and can be appropriately selected depending on the purpose, for example, benzoate, sorbate, dehydroacetate, paraoxybenzoic acid ester, 2,4,4'-trichloro-2'-hydride. Roxydiphenyl ether, 3,4,4'-trichlorocarbanilide, benzalkonium chloride, hinokitiol, resorcin, methylchloroisothiazolinone, methylisothiazolinone solution (Product name: Kayson CG, Rohm & Haas Japan) manufactured by the company), salicylic acid, pentanediol, phenoxyethanol, ethanol, etc.

The content of the preservative is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% by mass or more and 1% by mass or less.

The antioxidant is not particularly limited and can be appropriately selected depending on the purpose, and examples include dibutylhydroxytoluene, butylhydroxyanisole, and ascorbic acid.

The content of the antioxidant is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% by mass or more and 1% by mass or less.

The chelating agent is not particularly limited and can be appropriately selected depending on the purpose, and examples include disodium edetate, ethylenediamine tetraacetate, hexametaphosphate, and gluconic acid.

The content of the chelating agent is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% by mass or more and 1% by mass or less.

The pH adjuster is not particularly limited and can be appropriately selected depending on the purpose, for example, sodium hydroxide, potassium hydroxide, citric acid, succinic acid, triethanolamine, aqueous ammonia, triisopropanolamine, phosphoric acid, glycolic acid, etc. You can.

The ultraviolet ray absorber and the ultraviolet ray scattering agent are not particularly limited and can be appropriately selected depending on the purpose, for example, 2-hydroxy-4-methoxybenzophenone, octyldimethylparaminobenzoate, and ethylhexylparamethoxy. Examples include cyinamate, titanium oxide, kaolin, and talc.

The above vitamins are not particularly limited and can be appropriately selected depending on the purpose, and include, for example, vitamin A, vitamin B group, vitamin C, vitamin D, vitamin E, vitamin F, vitamin K, vitamin P, vitamin U, and carnitine. , ferulic acid, γ-oryzanol, α-lipoic acid, orotic acid and derivatives thereof, etc.

The content of the above vitamins is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.001% by mass or more and 0.5% by mass or less.

The above amino acids are not particularly limited and can be appropriately selected depending on the purpose, for example, glycine, alanine, valine, leucine, isoleucine, phenylalanine, tryptophan, cystine, cysteine, methionine, proline, hydroxyproline, aspartic acid, Glutamic acid, arginine, histidine, lysine, and derivatives thereof can be mentioned.

The content of the above amino acids is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.001% by mass or more and 0.5% by mass or less.

<pH>

The pH of the liquid skin cleanser composition at 25°C is preferably 9.5 to 11.0, and more preferably 9.8 to 10.6. There is no particular limitation on the pH measurement method, but examples include a method of measuring using a glass electrode colored hydrogen ion concentration indicator HM-30R (electrode type GST-5721 manufactured by Doa DK 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 purpose, but in terms of foam density and discharge from the foamer container, it is 5 mPa·s or more and 30 mPa·s or less. is preferable, and 15 mPa·s or more and 25 mPa·s or less are more preferable.

There are no particular restrictions on the method for measuring the viscosity, but for example, a BM type viscometer (manufactured by Tokyo Keiki Co., Ltd.) is used, sample temperature is 25°C, rotation speed is 60 rpm, and No. Examples include a method of measuring the viscosity after 1 minute using the rotor of No. 1.

<Former container>

The liquid skin cleanser composition of the present invention is of a type that is filled into a foamer container and discharged from the foamer container in the form of foam.

The foamer container is not particularly limited as long as it can discharge the liquid skin cleanser composition in a foam form, and can be appropriately selected depending on the purpose. For example, a non-gas foam discharger, a propellant, and a pressure-resistant container can be used. Aerosol containers, etc. can be mentioned. Among these, a non-gas type foam ejector is preferable.

-Non-gas type bubble ejector-

The non-gas type foam ejector is not particularly limited as long as it is capable of discharging the liquid skin cleanser composition in a foamed state by mixing it with air, and can be appropriately selected depending on the purpose. For example, the bottle body can be manually sprayed. Examples include a squeeze former container that can discharge foam by squeezing, a pump former container that can discharge foam by pushing down the nozzle portion, and the like.

As the squeeze former container and the pump former container, for example, a formerr container manufactured by Daiwa Seikan Co., Ltd., a formerr container manufactured by Yoshino Kogyosho Co., Ltd., etc. can be used. More specifically, the former containers described in JP-A-7-315463, JP-A-8-230961, and JP-A-2005-193972 can be used.

The non-gas type foam discharger usually has a porous membrane for forming foam, and foam is formed when the liquid skin cleanser composition passes through the porous membrane.

The material of the porous membrane is not particularly limited and can be appropriately selected depending on the purpose, but plastic materials such as nylon, polyester, and polyolefin are preferable.

The mesh of the porous membrane is not particularly limited and can be appropriately selected depending on the purpose, but for example, 100 mesh or more is preferable, 100 mesh or more is 400 mesh or less, more preferably 200 mesh or more, 305 mesh or less is more preferable. do.

The number of the porous membranes is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of improving foam performance, 2 to 4 sheets are preferable. More specifically, the former containers described in JP-A-7-315463, JP-A-8-230961, and JP-A-2005-193972 can be suitably used.

For example, when using the liquid skin cleanser composition using the pump former container each having one 305 mesh porous membrane and one 200 mesh porous membrane, the liquid skin cleanser composition under room temperature conditions of 25°C The viscosity is preferably 30 mPa·s or less, and more preferably 25 mPa·s or less.

<Manufacturing method>

The method for producing the liquid skin cleanser composition of the present invention is not particularly limited and can be appropriately selected depending on the purpose, including the components (A), (B), and (C), and, if necessary, the other components. , and purified water (mixed in the remaining amount so that the entire liquid skin cleanser composition is 100% by mass).

Specifically, it can be manufactured as follows. It can be prepared by dissolving the component (A) and the component (C) in purified water heated to 70°C to 80°C, cooling to 40°C or lower, and then adding the component (B) and other components.

The liquid skin cleanser composition may be prepared using a device. The above device is not particularly limited and can be appropriately selected depending on the purpose. Examples include a stirring device having a shearing force and a stirring blade capable of mixing the whole.

The stirring blade is not particularly limited and can be appropriately selected depending on the purpose, and examples include propellers, turbines, and dispers.

<Use>

There are no particular restrictions on the area and method of use of the liquid skin cleanser composition, and can be appropriately selected depending on the purpose. For example, it can be used on the whole body, face, hands, etc. in a normal use method.

The use of the liquid skin cleanser composition is not particularly limited and can be appropriately selected depending on the purpose, and examples include body shampoo, body soap, face wash foam, hand soap, foam hand soap cleansing foam, and cleanser.

Example

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

In addition, the content of each component described in the Examples and Comparative Examples is expressed in “mass%”, and all values are converted to pure content.

(Examples 1 to 25 and Comparative Examples 1 to 7)

A liquid skin cleanser composition with the composition and content shown in Tables 1 to 6 below was prepared by the following method.

Purified water in an amount equivalent to 95% by mass of the total amount of the liquid skin cleanser composition finally obtained is heated to 70°C to 80°C, and the anionic surfactant of component (A) and the potassium phosphate salt of component (C) or component (C) are added. The comparative components were dissolved. After cooling to 40°C or lower, a liquid skin cleanser composition was prepared by adding the cationic polymer of component (B), the comparative component of component (B), and other components. After that, when the predetermined pH is not reached, potassium hydroxide, a common ingredient, is added, the predetermined pH is adjusted to 10.0, and purified water is added so that the total amount is 100% by mass, and the target Examples 1 to 25 and Comparison The liquid skin cleanser compositions of Examples 1 to 7 were obtained. Additionally, it was stirred using a three-one motor (HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.), and a propeller was used as the stirring blade.

The pH of the obtained liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 7 was measured at 25°C using a pH meter (HM-30R; manufactured by TOA DKK).

The obtained liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 7 were filled into a container equipped with a foamer pump dispenser (discharge volume 3 mL, manufactured by Yoshino Kogyosho Co., Ltd.).

Regarding the obtained liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 7, “fastness of foam,” “denseness of foam,” “feeling of moisture on skin after towel drying,” and “after towel drying.” 'No stickiness on the skin' and 'discharge ability from the foamer container' were evaluated and determined. The results are shown in Tables 1 to 6 below.

<Evaluation of the speed of bubbles>

Ten expert evaluators took 2 pushes (approximately 6 g) of the liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 7 in the foamer container onto a nylon towel (Awaster Body Towel Soft, manufactured by Kicuron) and applied the whole body. The speed of foaming during washing was observed and evaluated based on the following evaluation criteria. The average rating of 10 professional evaluators was calculated, and judgment was made based on the following criteria.

〔Evaluation criteria for the speed of bubbles〕

4 points: Very foamy

3 points: Bubbles

2 points: Slightly foamy

1 point: Almost no foam

[Criteria for judging good foam retention]

◎: 3.5 points or more but 4.0 points or less

○: 3.0 points or more but less than 3.5 points

△: 2.0 points or more but less than 3.0 points

×: Less than 2.0 points

<Evaluation of foam density>

Ten expert evaluators took 2 pushes (about 6 g) of the liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 7 in the foamer container onto a nylon towel (Awaster Body Towel Soft, manufactured by Kicuron) and washed the entire body. Afterwards, the foam was held in the hand, the feeling of bouncing when pushed against each other with both hands, and the difficulty in sagging when the hands were turned upside down were observed, and evaluated based on the following evaluation criteria. The average rating of 10 professional evaluators was calculated, and judgment was made based on the following criteria.

[Evaluation criteria for foam density]

4 points: The foam is firm and does not stretch even when you turn your hand upside down.

3 points: The foam is slightly hard and does not stretch even when you turn your hand upside down.

2 points: The foam is a bit soft and tends to stretch a bit when you hold your hand upside down.

1 point: The foam is soft and sags when you hold your hand upside down.

[Standards for judging foam density]

◎: 3.5 points or more but 4.0 points or less

○: 3.0 points or more but less than 3.5 points

△: 2.0 points or more but less than 3.0 points

×: Less than 2.0 points

<Evaluation of moisture sensation on skin after towel drying>

Ten expert evaluators took 2 pushes (approximately 6 g) of the liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 7 in the foamer container onto a nylon towel (Awaster Body Towel Soft, manufactured by Kicuron) and applied the whole body. Cleaned. Afterwards, it was rinsed with warm water at 40°C, dried with a towel, and stabilized in a constant temperature room at 38°C for 30 minutes, and the “moisture feel of the skin” was evaluated based on the following evaluation criteria. The average rating of 10 professional evaluators was calculated, and judgment was made based on the following criteria.

[Evaluation criteria for moisture sensation on skin after towel drying]

4 points: Feels very moisturized

3 points: Feels moisturized

2 points: Feels slightly moisturized

1 point: Does not feel very moisturizing

[Standards for judging the feeling of moisture on the skin after towel drying]

◎: 3.5 points or more but 4.0 points or less

○: 3.0 points or more but less than 3.5 points

△: 2.0 points or more but less than 3.0 points

×: Less than 2.0 points

<Evaluation of lack of stickiness on skin after towel drying>

Ten expert evaluators took 2 pushes (approximately 6 g) of the liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 7 in the foamer container onto a nylon towel (Awaster Body Towel Soft, manufactured by Kicuron) and applied the whole body. Cleaned. Afterwards, it was rinsed with hot water at 40°C, dried with a towel, and then stabilized in a constant temperature room at 38°C for 30 minutes, and “no stickiness to the skin” was evaluated based on the following evaluation criteria. The average rating of 10 professional evaluators was calculated, and judgment was made based on the following criteria.

[Evaluation criteria for lack of stickiness on skin after towel drying]

4 points: Does not feel sticky

3 points: Feels slightly sticky

2 points: Feels sticky

1 point: Feels a strong stickiness

[Criteria for judging the absence of stickiness on the skin after towel drying]

◎: 3.5 points or more and 4.0 points or less

○: 3.0 points or more but less than 3.5 points

△: 2.0 points or more but less than 3.0 points

×: Less than 2.0 points

<Evaluation of discharge properties from foamer container>

The liquid skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 7 were filled into a container with a foamer pump dispenser (discharge volume 3 mL, manufactured by Yoshino Kogyosho Co., Ltd.), and 10 expert evaluators found that it was easy to dispense at 25°C. , and the texture of the discharged foam was evaluated. The average rating of 10 professional evaluators was calculated, and judgment was made based on the following criteria.

[Evaluation criteria for discharge from foamer container]

4 points: The pump is easy to press, and delicate bubbles are discharged.

3 points: The pump is easy to press, but there are some large bubbles mixed in.

2 points: The pump is slightly difficult to press, and a lot of large particle bubbles are mixed.

1 point: The pump is very difficult to press, and only large bubbles are discharged.

[Judgment criteria for discharge from foamer container]

◎: 3.5 points or more but 4.0 points or less

○: 3.0 points or more but less than 3.5 points

△: 2.0 points or more but less than 3.0 points

×: Less than 2.0 points

(Prescription Examples 1 to 6)

A liquid skin cleanser composition with the composition and content shown in Table 7 below was prepared in the same manner as Example 1.

Details of each component used in Examples 1 to 25, Comparative Examples 1 to 7, and Prescription Examples 1 to 6 are shown in Table 8 below.

※1: Potassium laurate was used prepared by neutralizing lauric acid (NAA-122, manufactured by NOF CORPORATION) with potassium hydroxide (liquid caustic potassium manufactured by Asahi Glass Co., Ltd.).

※2: Potassium myristic acid was used, prepared by neutralizing myristic acid (NAA-142, manufactured by NOF CORPORATION) with potassium hydroxide (liquid caustic potassium manufactured by Asahi Glass Co., Ltd.).

※3: Potassium palmitic acid 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 used, prepared by neutralizing stearic acid (NAA-180, manufactured by NOF CORPORATION) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).

※5: The fragrances are fragrances A to D described in paragraphs [0065] to [0071] of Japanese Patent Application Laid-Open No. 2002-128658, and aromatics A to D described in paragraphs [0076] to [0088] of Japanese Patent Application Laid-Open No. 2003-73249. E, or it was appropriately selected from the combined fragrance compositions 1 to 4 described in paragraphs [0016] to [0023] of Japanese Patent Application Laid-Open No. 2020-132680.

The liquid skin cleanser composition of the present invention has a moist feeling on the skin after towel drying, no stickiness on the skin after towel drying, and dischargeability from the foamer container, and when washing with a body cleansing towel. Since the foaming speed and foam density are excellent, for example, it can be suitable for use in body shampoo, body soap, face wash foam, hand soap, foam hand soap cleansing foam, cleanser, etc.

Claims (4)

(A) an anionic surfactant,
(B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer,
(C) Contains potassium phosphate salt,
The molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 40% or more,
The mass ratio [(B)/(C)] of the content of the component (B) to the content of the component (C) is 0.2 or more and 8.0 or less,
A liquid skin cleanser composition, characterized in that it is filled in a foamer container. According to claim 1,
The content of the component (A) is 10% by mass or more and 25% by mass or less based on the total amount of the liquid skin cleanser composition,
The content of the component (B) is 0.2% by mass or more and 0.8% by mass or less based on the total amount of the liquid skin cleanser composition,
A liquid skin cleanser composition in which the content of the component (C) is 0.1% by mass or more and 1.0% by mass or less with respect to the total amount of the liquid skin cleanser composition. The method of claim 1 or 2,
A liquid skin cleanser composition wherein the (C) potassium phosphate salt is at least one selected from potassium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium tripolyphosphate, and potassium polyphosphate. The method according to any one of claims 1 to 3,
A liquid skin cleanser composition having a viscosity of 5 mPa·s or more and 30 mPa·s or less at 25°C.