Skin cleanser composition

Abstract

To provide a skin cleanser composition which is excellent in deodorization sustainability of odors caused by sweat, sebum or the like, skin texture after towel drying, persistence of moist feeling on the skin after towel drying, non-stickiness on the skin after towel drying and low temperature stability.SOLUTION: There is provided a skin cleanser composition which comprises (A) an anionic surfactant, (B) at least one cationic polymer selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer and (C) at least one selected from a highly-branched cyclic dextrin and a hydroxyalkylated cyclodextrin, wherein the molar ratio of a structural unit derived from a dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 40% or more and the mass ratio [{(B)+(C)} / (A)] of the sum of the content of the component (C) and the component (B) to the content of the component (A) is 0.01 or more and 0.05 or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a skin cleanser composition. [Background technology]

[0002] Conventionally, skin cleanser compositions such as body soaps and hand soaps are required to have excellent moisturizing properties and to improve the condition of skin after cleansing. To achieve excellent moisturizing properties, it is considered to improve foam performance, such as foam creaminess, foam volume, foam elasticity, and foam retention, which are important properties for providing a moisturizing sensation. Furthermore, to improve the condition of skin after cleansing, it is considered to impart a moist feeling to the skin after cleansing and to improve the skin texture. Furthermore, there is a demand for skin cleanser compositions that have deodorizing properties against odors caused by sweat, sebum, etc., and that prevent the precipitation of ingredients even when stored under low-temperature conditions.

[0003] In recent years, liquid skin cleanser compositions have been proposed that contain a higher fatty acid salt and an amphoteric surfactant or alkylamine oxide as a cleansing base, and that have improved foam quality and excellent cleansing power against greasy and odorous stains (see, for example, Patent Document 1). However, although the proposed liquid skin cleanser composition has excellent cleansing power, it relies on the masking of odorous stains by fragrance, and therefore has the problem that it does not provide sufficient deodorizing power and does not provide sufficient lasting moist feeling to the skin after towel drying.

[0004] Furthermore, a liquid skin cleanser composition containing at least one selected from highly branched cyclic dextrins and hydroxyalkylated cyclodextrins has been proposed for the purpose of imparting long-lasting deodorizing properties (see, for example, Patent Document 2). However, the proposed liquid skin cleanser composition had problems such as roughening of the skin texture after towel drying, not maintaining the moist feeling of the skin after cleansing, and reduced low-temperature stability.

[0005] Therefore, a skin cleanser composition that improves the durability of deodorizing odors caused by sweat, sebum, etc., improves skin texture after towel drying, improves the durability of moist feeling on the skin after towel drying, and improves non-stickiness on the skin after towel drying, and prevents precipitation of ingredients even under low temperature conditions, has not yet been provided, and there is currently a strong demand for the prompt development of such a composition. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-182698 [Patent Document 2] International Publication No. 2016 / 093089 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention aims to solve the above-mentioned problems of the prior art and to achieve the following objectives: to provide a skin cleanser composition that has a long-lasting deodorizing effect on odors caused by sweat, sebum, etc., a smooth skin texture after towel drying, a long-lasting moist feeling on the skin after towel drying, no stickiness on the skin after towel drying, and excellent low-temperature stability. [Means for solving the problem]

[0008] As a result of intensive research to achieve the above-mentioned object, the present inventors have found that the skin cleanser composition of the present invention comprises (A) an anionic surfactant, (B) at least one cationic polymer selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer, and (C) at least one selected from a highly branched cyclic dextrin and a hydroxyalkylated cyclodextrin, wherein the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 40% or more, and the mass ratio of the sum of the contents of the components (B) and (C) to the content of the component (A), [{(B) + (C)} / (A)], is 0.01 or more and 0.05 or less, thereby achieving excellent deodorizing properties against odors caused by sweat, sebum, etc., skin texture after towel drying, sustained moist feeling on the skin after towel drying, non-stickiness on the skin after towel drying, and low-temperature stability.

[0009] The present invention is based on the above findings of the present inventors, and the means for solving the above problems are as follows. <1> The skin cleanser composition comprises (A) an anionic surfactant, (B) at least one cationic polymer selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer, and (C) at least one selected from a highly branched cyclic dextrin and a hydroxyalkylated cyclodextrin, wherein the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 40% or more, and the mass ratio of the sum of the contents of the components (B) and (C) to the content of the component (A), [{(B) + (C)} / (A)], is 0.01 or more and 0.05 or less. <2> (D) The copolymer represented by the following general formula (D1): <1> The skin cleansing composition according to claim 1. [ka] In the general formula (D1), n, m, and z represent the molar ratio (mol %) of each structural unit, where n+m+z=100, n is 0 to 34, m is 24 to 31, and z is 35 to 76. <3> The content of the (A) component is 12% by mass or more and 24% by mass or less, based on the total amount of the skin cleanser composition, the content of the (B) component is 0.2% by mass or more and 0.8% by mass or less, based on the total amount of the skin cleanser composition, and the content of the (C) component is 0.03% by mass or more and 0.1% by mass or less, based on the total amount of the skin cleanser composition. <1> From the above <2> The skin cleanser composition according to any one of the above items. <4> The content of the component (D) is 0.1% by mass or more and 0.5% by mass or less based on the total amount of the skin cleanser composition. <2> From the above <3> The skin cleanser composition according to any one of the above items. [Effects of the Invention]

[0010] According to the present invention, the above-mentioned conventional problems can be solved, the above-mentioned objects can be achieved, and a skin cleanser composition can be provided which has excellent low-temperature stability, long-lasting deodorizing effect on odors caused by sweat, sebum, etc., smooth skin texture after towel drying, long-lasting moist feeling on skin after towel drying, and no stickiness on skin after towel drying. DETAILED DESCRIPTION OF THE INVENTION

[0011] (Skin cleanser composition) The skin cleanser composition of the present invention contains (A) an anionic surfactant, (B) at least one cationic polymer selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer, and (C) at least one selected from a highly branched cyclic dextrin and a hydroxyalkylated cyclodextrin, and may further contain other components as necessary. In this specification, (A) anionic surfactant may be referred to as "component (A)," (B) at least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer may be referred to as "component (B)," and (C) at least one selected from highly branched cyclic dextrin and hydroxyalkylated cyclodextrin may be referred to as "component (C)."

[0012] <(A) Anionic surfactant> The (A) anionic surfactant is contained to improve lather retention and the durability of moist feeling on the skin after towel drying. In this specification, the term "foam retention" means that the foam remains intact.

[0013] The anionic surfactant of component (A) is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include higher fatty acid salts, polyoxyethylene (POE) alkyl ether sulfates, ether carboxylates, amino acid surfactants, etc. Among these, higher fatty acid salts are preferred from the viewpoint of improving lather retention and the sustained moist feeling on the skin after towel drying. These may be used alone or in combination of two or more.

[0014] -Higher fatty acid salts- The higher fatty acid salt is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include laurate, myristate, palmitate, stearate, etc. Among these, higher fatty acid salts containing both laurate and myristate are preferred from the viewpoints of improving foam retention and the durability of moist feeling on the skin after towel drying. These may be used alone or in combination of two or more.

[0015] The salt in the higher fatty acid salt is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include alkali metal salts, amine salts, and amino acid salts. The alkali metal salt is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include sodium salts and potassium salts. The amine salt is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include ammonium salts, monoethanolamine salts, diethanolamine salts, triethanolamine salts, and alkanolamine salts such as 2-amino-2-methylpropanol and 2-amino-2-methylpropanediol. The amino acid salt is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include lysine salt and arginine salt. Among these, alkali metal salts are preferred, and potassium salts are more preferred.

[0016] The higher fatty acid salt may be suitably synthesized or may be a commercially available product. The method for synthesizing the higher fatty acid salt is not particularly limited and can be appropriately selected depending on the purpose. For example, a fatty acid salt obtained by a conventional method may be blended as is, or the higher fatty acid salt may be synthesized by neutralizing a higher fatty acid with an alkali such as potassium hydroxide in a blending tank during the blending process of the skin cleanser composition.

[0017] Examples of commercially available higher fatty acid salts include, by trade name, NIKKOL potassium laurate LK-120 (potassium laurate), NIKKOL potassium myristate MK-140 (potassium myristate), Tysoap MNK-40 (potassium coconut oil fatty acid) (all manufactured by Nikko Chemicals Co., Ltd.), and Nonsal PK-1 (potassium palmitate) (manufactured by NOF Corporation).

[0018] -Polyoxyethylene (POE) alkyl ether sulfate- The polyoxyethylene alkyl ether sulfate is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include compounds represented by the following general formula (A1). The polyoxyethylene alkyl ether sulfates may be used alone or in combination of two or more.

[0019] [ka] In the general formula (A1), R 7 represents an alkyl group, and the alkyl group moiety preferably has 10 to 14 carbon atoms. In the general formula (A1), n ​​represents the average number of moles of ethylene oxide (EO) added, and the average number of moles of ethylene oxide added 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. Examples thereof include sodium and potassium.

[0020] Specific examples of the polyoxyethylene alkyl ether sulfates include polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (2) sodium lauryl ether sulfate (also known as POE (2) sodium laureth sulfate), polyoxyethylene (3) sodium lauryl ether sulfate (also known as POE (3) sodium laureth sulfate), polyoxyethylene (4) sodium lauryl ether sulfate, polyoxyethylene (5) sodium lauryl ether sulfate, polyoxyethylene (3) sodium alkyl (C12,13) ​​ether sulfate, polyoxyethylene (2) lauryl ether ammonium sulfate, and polyoxyethylene (3) lauryl ether ammonium sulfate. The value in the parentheses indicates the average number of moles (n) of ethylene oxide (EO) added.

[0021] The polyoxyethylene alkyl ether sulfate may be suitably synthesized or may be a commercially available product. Examples of commercially available polyoxyethylene alkyl ether sulfates include Texapon (registered trademark) N70 (polyoxyethylene (2) lauryl ether sodium sulfate) (manufactured by BASF) and Shinorin SPE-1250 (polyoxyethylene (2) lauryl ether sodium sulfate) (manufactured by New Japan Chemical Co., Ltd.).

[0022] -Ether carboxylate- The ether carboxylate is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include compounds represented by the following general formula (A2) or (A3). The ether carboxylates may be used alone or in combination of two or more.

[0023] [ka] In the general formulas (A2) and (A3), R 8 represents a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms, or a phenyl group substituted with a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms, and the R 8 The moiety preferably has 10 to 14 carbon atoms. In the general formula (A2), R 9 may be the same or different and represent an alkylene group having 2 to 4 carbon atoms, preferably 2 carbon atoms. In the general formula (A2), o represents an average number of moles of alkylene oxide added of 1 to 20, and the average number of moles of alkylene oxide added 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.

[0024] Specific examples of the ether carboxylate salt represented by the general formula (A2) or (A3) include polyoxyethylene (3) lauryl ether sodium acetate, polyoxyethylene (4) lauryl ether potassium acetate, and sodium lauryl glycol acetate. The numerical value in the parentheses indicates the average number of moles (o) of alkylene oxide added.

[0025] The ether carboxylate may be an appropriately synthesized product or a commercially available product. Commercially available ether carboxylates include, for example, Energicol EC-30 (polyoxyethylene (3) lauryl ether sodium acetate) (manufactured by Lion Specialty Chemicals Co., Ltd.), Viewlite LCA-25F (polyoxyethylene (3) lauryl ether sodium acetate), Viewlite LCA-30D (polyoxyethylene (3) lauryl ether sodium acetate), Viewlite LCA-H (polyoxyethylene (4) lauryl ether acetic acid), Viewlite LCA-25NH (laureth-4 carboxylic acid), Viewlite SHAA (sodium lauryl glycol carboxylate), Viewlite LCA (polyoxyethylene (3) lauryl ether sodium acetate) (all manufactured by Sanyo Chemical Industries, Ltd.), Kao Akipo RLM-45NV (polyoxyethylene (4.5) lauryl ether sodium acetate), and Kao Akipo RLM-100NV (polyoxyethylene (10) lauryl ether sodium acetate) (all manufactured by Kao Corporation). The numerical value in the parentheses indicates the average number of moles (o) of alkylene oxide added.

[0026] -Amino acid surfactant- The amino acid-based surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include compounds represented by the following general formula (A4). The amino acid-derived surfactants may be used alone or in combination of two or more.

[0027] [ka] In the general formula (A4), R 10 represents a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms, or a phenyl group substituted with a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms, and 10 The carbon number of the moiety 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 are a hydrogen atom or -(CH2) m -COOM 2 Shows. In the general formula (A4), m and n may be the same or different and represent a number of 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.

[0028] The amino acid structure of the hydrophilic portion of the amino acid surfactant is not particularly limited and can be appropriately selected depending on the purpose, but glycine, glutamic acid, and methylalanine are preferred.

[0029] Specific examples of the amino acid surfactant represented by general formula (A4) include N-acylglycines and salts thereof, such as N-cocoylglycine potassium (N-cocoylglycine potassium), N-acyl-N-carboxyethylglycines and salts thereof, such as N-myristoyl-N-carboxyethylglycine sodium, N-acylglutamic acids and salts thereof, such as sodium N-myristoyl-L-glutamate, potassium N-myristoyl-L-glutamate, potassium N-cocoyl-L-glutamate, sodium N-palm acyl-L-glutamate, and sodium N-stearoyl-L-glutamate, and N-lauroyl-N-methyl-β-alanine potassium.

[0030] The amino acid-based surfactant may be suitably synthesized or may be a commercially available product. Commercially available amino acid surfactants include, for example, Amirite (registered trademark) GCK-11 (potassium N-coconut oil fatty acid acylglycine), Amirite (registered trademark) GCK-12K (potassium N-coconut oil fatty acid acylglycine), Amirite (registered trademark) GCS-12K (sodium N-coconut oil fatty acid acylglycine), Amirite (registered trademark) GCS-11 (sodium N-coconut oil fatty acid acylglycine), Amisoft (registered trademark) CS-11 (sodium N-myristoyl-L-glutamate), Amisoft (registered trademark) CS-22 (sodium N-coconut oil fatty acid acyl-L-glutamate), Amisoft (registered trademark) LS-11 (sodium N-lauroyl-L-glutamate), and Amisoft (registered trademark) CS-22 (sodium N-coconut oil fatty acid acyl-L-glutamate). sodium glutamate), Amisoft® MS-11 (N-myristoyl-L-glutamate sodium), Amisoft® HS-11P (N-stearoyl-L-glutamate sodium), Amisoft® HS-11P(F) (N-stearoyl-L-glutamate sodium), Amisoft® HS21 (N-stearoyl-L-glutamate disodium), Amirite® ACS-12 (cocoylalanine sodium) (all manufactured by Ajinomoto Healthy Supply Co., Ltd.), AminoSurfact® AMMS-P1 (N-myristoyl-L-glutamate sodium) (manufactured by Asahi Kasei Chemicals Corporation), NIKKOL Examples include Sarcosinate MN (sodium myristoyl methylaminoacetate), NIKKOL Alaninate LN-30 (sodium lauroyl methyl-β-alanine) (all manufactured by Nikko Chemicals Co., Ltd.), Alanon ACE (sodium coconut oil fatty acid methylalanine), Alanon AME (sodium myristoyl methyl-β-alanine), Alanon ALE (sodium lauroyl methyl-β-alanine) (all manufactured by Kawaken Fine Chemicals Co., Ltd.), Energicol L-30AN (sodium lauroyl methyl-β-alanine) (manufactured by Lion Specialty Chemicals Co., Ltd.), and Softilt AT-L (sodium lauroyl methyl-β-alanine) (manufactured by NOF Corporation).

[0031] The total content of the anionic surfactants in the component (A) is not particularly limited and can be selected appropriately depending on the purpose. From the viewpoint of improving lather retention and the durability of moist feeling on the skin after towel drying, the total content is preferably from 8% by mass to 30% by mass, and more preferably from 12% by mass to 24% by mass, based on the total amount of the skin cleanser composition. When the total content of the (A) components is 8% by mass or more relative to the total amount of the skin cleanser composition, it is possible to obtain a skin cleanser composition that has improved foam retention and provides excellent lasting moist feeling on the skin after towel drying.When the total content of the (A) components is 30% by mass or less relative to the total amount of the skin cleanser composition, it is possible to obtain a skin cleanser composition that provides excellent lasting moist feeling on the skin after towel drying.

[0032] <(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 durability of moist feeling on the skin after towel drying. The component (B) may be used alone or in combination of two or more. The dimethyldiallylammonium chloride-acrylic acid copolymer in the component (B) is represented by the following general formula (B1).

[0033] [ka] In the general formula (B1), n ​​and m represent the molar ratio (mol %) of each structural unit. In the general formula (B1), n ​​is 0 to 35, m is 40 to 100, and n and m satisfy the following formula (I). n+m=100...Formula (I)

[0034] In the present invention, the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 40 mol % or more. By having the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer be 40 mol % or more, a skin cleanser composition can be obtained that provides excellent lasting moist feeling to the skin after towel drying. Furthermore, the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is preferably 65 mol% or more, and more preferably 95 mol% or more, from the viewpoint of improving the durability of moist feeling on the skin after towel drying. The dimethyldiallylammonium chloride-acrylic acid copolymer may be used alone or in combination of two or more kinds.

[0035] The content of the (B) cationic polymer is not particularly limited and can be selected appropriately depending on the purpose. However, from the viewpoint of maintaining moist feeling on the skin after towel drying and non-stickiness on the skin after towel drying, the content is preferably 0.1% by mass or more and 1% by mass or less, and more preferably 0.2% by mass or more and 0.8% by mass or less, based on the total amount of the skin cleanser composition. When the content of the component (B) is 0.1% by mass or more relative to the total amount of the skin cleanser composition, a skin cleanser composition that provides excellent lasting moist feeling on the skin after towel drying can be obtained.When the content of the component (B) is 1% by mass or less relative to the total amount of the skin cleanser composition, a skin cleanser composition that provides satisfactory non-stickiness on the skin after towel drying can be obtained.

[0036] The molar ratio of each structural unit in the dimethyldiallylammonium chloride-acrylic acid copolymer in the component (B) can be determined by measuring by nuclear magnetic resonance (NMR) under the following measurement conditions. [Measurement conditions] Solvent: Deuterium oxide (DO) Measuring instrument: JNM-LA300 (300MHz, manufactured by JEOL Ltd.)

[0037] The weight average molecular weight of the (B) cationic polymer is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of moist feeling on the skin after towel drying, it is preferably 10,000 to 1,000,000, more preferably 15,000 to 450,000. The weight average molecular weight of the (B) cationic polymer can be measured, for example, by a SEC-MALLS-RI system (measurement conditions: column: TSKgel α series α-M column 30 cm manufactured by Tosoh Corporation, solvent: 0.3 M aqueous sodium nitrate solution).

[0038] The viscosity of a solution of the (B) cationic polymer having a solid content of 30% by mass 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, for example, using a Brookfield viscometer LVF (manufactured by Brookfield).

[0039] The (B) cationic polymer may be suitably synthesized or may be a commercially available product. Commercially available examples of the (B) cationic polymer include MERQUAT 100, MERQUAT 106, MERQUAT 295, and MERQUAT 280 (all manufactured by Lubrizol Corporation). Of these, MERQUAT 100, MERQUAT 280, and MERQUAT 295 are preferred. The composition and physical properties of each commercially available product are shown below. -Marquardt 100- Composition (molar ratio) Acrylic acid: dimethyldiallylammonium chloride = 0:100 ·Solid content 39% to 44% by mass Viscosity at 25°C: 8,000mPa·s to 12,000mPa·s ·Weight average molecular weight 150,000 The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with a spindle No. 3 rotor at 6 revolutions per minute. -Marquardt 106- Composition (molar ratio) Acrylic acid: dimethyldiallylammonium chloride = 0:100 ·Solid content 30% to 36% by mass Viscosity at 25°C: 20mPa·s to 65mPa·s ·Weight average molecular weight 15,000 The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with a spindle No. 3 rotor at 60 rpm. -Marquardt 295- Composition (molar ratio) Acrylic acid: dimethyldiallylammonium chloride = 5:95 ·Solid content 35% to 40% by mass Viscosity at 25°C: 3,500mPa·s to 9,000mPa·s ·Weight average molecular weight 150,000 The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with a spindle No. 4 rotor at 30 rpm. -Marquardt 280- Composition (molar ratio) Acrylic acid: dimethyldiallylammonium chloride = 35:65 ·Solid content 39% by mass ~ 43% by mass Viscosity at 25°C: 3,000mPa·s to 6,000mPa·s ·Weight average molecular weight 450,000 The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with a spindle No. 4 rotor at 30 rpm.

[0040] <(C) Highly branched cyclic dextrins and hydroxyalkylated cyclodextrins> At least one selected from highly branched cyclic dextrins and hydroxyalkylated cyclodextrins as component (C) is contained to improve the deodorizing durability of odors caused by sweat, sebum, and the like. The "deodorizing durability of odors caused by sweat, sebum, etc." is sometimes referred to as "deodorizing durability." The component (C) is preferably a hydroxyalkylated cyclodextrin, as this improves the deodorizing durability. The component (C) may be used alone or in combination of two or more.

[0041] -Highly branched cyclic dextrin- The highly branched cyclic dextrin refers to a glucan having an inner branched cyclic structure portion and an outer branched structure portion, and having a weight average degree of polymerization in the range of 50 to 10,000. The inner branched cyclic structure portion refers to a cyclic structure portion formed by an α-1,4-glucosidic bond and an α-1,6-glucosidic bond. The outer branched structural portion refers to a glucan that is a non-cyclic structural portion bonded to the inner branched cyclic structural portion. The highly branched cyclic dextrin is also called "cluster dextrin" (a registered trademark of Glico Nutrition Foods Co., Ltd.).

[0042] The highly branched cyclic dextrin is not particularly limited and can be appropriately selected depending on the purpose. However, it is preferable that the highly branched cyclic dextrin has a weight-average molecular weight of 30,000 to 1,000,000, and more preferably contains mainly dextrin having a weight-average degree of polymerization of about 2,500, in which one cyclic structure in the molecule is further bound to a large number of glucan chains.

[0043] The weight average molecular weight can be measured by gel permeation chromatography multi-angle light scattering (GPC-MALLS) analysis under the following conditions. [Measurement conditions] Measurement equipment: Gel Permeation Chromatography System (Shimadzu Corporation) Measurement sample solution: The pure concentration of component (B) is approximately 1,000 ppm (diluted with mobile phase) Column: Column for polar organic solvents (TSK-GEL α column, manufactured by Tosoh Corporation) Mobile phase: 0.5 mol / L sodium perchlorate solution ·Measurement wavelength: approx. 633nm Detector: Multi-angle light scattering detector (MALLS) Standard: Polyethylene glycol with known molecular weight

[0044] The highly branched cyclic dextrin is produced, for example, by using starch as a raw material and treating it with an enzyme called a branching enzyme. Starch, the raw material, consists of amylose, in which glucose units are linearly linked by α-1,4-glucosidic bonds, and amylopectin, which has a complex branched structure via α-1,6-glucosidic bonds. The amylopectin is a macromolecule composed of many linked cluster structures. The branching enzyme used is a glucan chain transferase widely distributed in animals, plants, and microorganisms. It acts on the joints of the amylopectin cluster structure and catalyzes the reaction to cyclize it. More specifically, examples of the highly branched cyclic dextrin include glucans having an inner branched cyclic structure portion and an outer branched structure portion and having a weight-average degree of polymerization in the range of 50 to 10,000, as described in JP-A-8-134104. In this specification, the highly branched cyclic dextrin can be understood in light of the description in JP-A-8-134104.

[0045] As described above, the highly branched cyclic dextrin has a specific structure and a high weight-average degree of polymerization (molecular weight), and is different from general cyclodextrins in which 6 to 8 glucose molecules are bonded, such as α-cyclodextrin (6 glucose molecules), β-cyclodextrin (7 glucose molecules), and γ-cyclodextrin (8 glucose molecules). Hydroxyalkylated cyclodextrins, which will be described later, are cyclodextrins in which hydroxyalkyl groups have been introduced into some of the hydroxyl groups, and are different from the highly branched cyclic dextrins.

[0046] As the highly branched cyclic dextrin, a suitably synthesized product or a commercially available product may be used. Examples of commercially available highly branched cyclic dextrins include Cluster Dextrin (a registered trademark of Glico Nutrition Foods Co., Ltd., manufactured by Glico Nutrition Foods Co., Ltd.) and Cluster Dextrin (a registered trademark of Glico Nutrition Foods Co., Ltd., manufactured by Nippon Shokuhin Kako Co., Ltd.).

[0047] -Hydroxyalkylated cyclodextrin- The hydroxyalkylated cyclodextrin is a compound in which glucose units are linked in a ring via α-1,4-glucosidic bonds and in which hydroxyalkyl groups have been introduced into some of the hydroxyl groups of the cyclodextrin, and examples thereof include compounds represented by the following general formula (C1): The hydroxyalkylated cyclodextrin has significantly higher solubility in detergents than β-cyclodextrin.

[0048] [ka] However, in the general formula (C1), R 2 , R 3 , and R 4 each independently represents a hydrogen atom, a methyl group, an ethyl group, a propyl group, or a butyl group, and n represents an integer of 6 to 8. However, the above R 2 , the R 3 , and the R 4 cannot simultaneously become a hydrogen atom.

[0049] Examples of the cyclodextrin moiety of the hydroxyalkylated cyclodextrin include α-cyclodextrin in which six glucose molecules are bonded to a ring, β-cyclodextrin in which seven glucose molecules are bonded to a ring, and γ-cyclodextrin in which eight glucose molecules are bonded to a ring. Among these, β-cyclodextrin is preferred.

[0050] Examples of the hydroxyalkylated cyclodextrin include hydroxymethyl-α-cyclodextrin, hydroxymethyl-β-cyclodextrin, hydroxymethyl-γ-cyclodextrin, hydroxyethyl-α-cyclodextrin, hydroxyethyl-β-cyclodextrin, hydroxyethyl-γ-cyclodextrin, hydroxypropyl-α-cyclodextrin, hydroxypropyl-β-cyclodextrin, hydroxypropyl-γ-cyclodextrin, hydroxybutyl-α-cyclodextrin, hydroxybutyl-β-cyclodextrin, hydroxybutyl-γ-cyclodextrin, etc. Among these, hydroxyethyl-β-cyclodextrin and hydroxypropyl-β-cyclodextrin are preferred, and hydroxypropyl-β-cyclodextrin is more preferred, in terms of improving deodorizing durability. These may be used alone or in combination of two or more.

[0051] From the viewpoint of deodorizing durability, the degree of substitution of the hydroxyalkyl group of the hydroxyalkylated cyclodextrin per cyclodextrin is preferably 1 to 14. If the degree of substitution is 1 or more or 14 or less, the problem of insufficient deodorizing durability can be resolved.

[0052] The hydroxyalkylated cyclodextrin may be suitably synthesized or may be a commercially available product. Examples of commercially available hydroxyalkylated cyclodextrins include Celdex HP-β-CD (hydroxypropyl-β-cyclodextrin; manufactured by Nihon Shokuhin Kako Co., Ltd.) under the trade name.

[0053] The content of at least one selected from highly branched cyclic dextrins and hydroxyalkylated cyclodextrins as component (C) is preferably from 0.01% by mass to less than 0.2% by mass, and more preferably from 0.03% by mass to 0.1% by mass, based on the total amount of the skin cleanser composition, from the viewpoints of the durability of deodorizing odors caused by sweat, sebum, etc., and low-temperature stability. When the content is 0.01% by mass or more relative to the total amount of the skin cleanser composition, it is possible to obtain a skin cleanser composition that has excellent deodorizing durability against odors caused by sweat, sebum, etc. When the content is less than 0.2% by mass relative to the total amount of the skin cleanser composition, it is possible to obtain a skin cleanser composition that has good low-temperature stability.

[0054] <Mass ratio [{(B)+(C)} / (A)]> In the present invention, the mass ratio of the sum of the contents of the components (B) and (C) to the content of the component (A) [{(B)+(C)} / (A)] is 0.01 or more and 0.05 or less. When the mass ratio of the contents [{(B)+(C)} / (A)] is 0.01 or more, it is possible to obtain a skin cleanser composition that provides a long-lasting moist feeling on the skin after towel drying, long-lasting deodorization of odors caused by sweat and sebum, and excellent skin texture after towel drying.When the mass ratio of the contents [{(B)+(C)} / (A)] is 0.05 or less, it is possible to obtain a skin cleanser composition that provides a non-sticky feeling on the skin after towel drying and excellent low-temperature stability. Furthermore, the mass ratio of the sum of the contents of the (B) component and the (C) component to the content of the (A) component [{(B)+(C)} / (A)] is preferably 0.015 or more and 0.04 or less.

[0055] <(D) Copolymer represented by general formula (D1)> The skin cleansing composition of the present invention may contain a copolymer represented by the following general formula (D1), in addition to the components (A), (B), and (C). The copolymer represented by the general formula (D1) may be referred to as "component (D)". The copolymer of component (D) is contained to improve foam retention.

[0056] [ka] In the general formula (D1), n, m, and z represent the molar ratio (mol %) of each structural unit, and n+m+z=100. The n is 0 to 34, the m is 24 to 31, and the z is 35 to 76. Among these, in terms of improving foam retention, n:m:z=(0:30:70) and (0:24:76) are preferred in the general formula (D1).

[0057] The molar ratio of each structural unit in the copolymer of component (D) can be determined by measuring by nuclear magnetic resonance (NMR) under the following measurement conditions. [Measurement conditions] Solvent: Deuterium oxide (DO) Measuring instrument: JNM-LA300 (300MHz, manufactured by JEOL Ltd.)

[0058] The weight average molecular weight of the copolymer of component (D) is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 100,000 to 3,000,000, and more preferably 100,000 to 1,600,000. The weight average molecular weight of the copolymer of component (D) can be measured, for example, using a SEC-MALLS-RI system (measurement conditions: column: TSKgel α series α-M column 30 cm manufactured by Tosoh Corporation, solvent: 0.3 M aqueous sodium nitrate solution).

[0059] The viscosity of the copolymer of component (D) at 25° C. in a solution with a solid content of 8 to 45% by mass is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 1,500 mPa·s to 16,000 mPa·s. The viscosity can be measured, for example, using a Brookfield viscometer LVF (manufactured by Brookfield).

[0060] The copolymer of component (D) may be either an appropriately synthesized product or a commercially available product. Commercially available copolymers of component (D) include, for example, Merquat 550PR, Merquat 740, Merquat 3330PR, Merquat 3331PR, and Merquat 3940 (all manufactured by Lubrizol Corp.), etc. Among these, Merquat 740 is preferred. The composition and physical properties of each commercially available product are shown below. -Marquardt 550PR- Composition: Dimethyldiallylammonium chloride-acrylamide copolymer ·Solid content 8.8% by mass ~ 9.8% by mass Viscosity at 25°C: 7,500mPa·s to 15,000mPa·s ·Weight average molecular weight 160,000 n:m:z=0:30:70 in general formula (D1) The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with a spindle No. 4 rotor at 10 revolutions per minute. -Marquardt 740- Composition: Dimethyldiallylammonium chloride-acrylamide copolymer ·Solid content 41% to 45% by mass Viscosity at 25°C: 2,000mPa·s to 12,000mPa·s ·Weight average molecular weight 120,000 n:m:z=0:24:76 in general formula (D1) The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with a spindle No. 4 rotor at 10 revolutions per minute. -Marquardt 3330PR- Composition: Dimethyldiallylammonium chloride-acrylamide copolymer ·Solid content 10.2% by mass ~ 11.5% by mass Viscosity at 25°C: 1,000mPa·s to 6,000mPa·s ·Weight average molecular weight 150,000 n:m:z=34:31:35 in general formula (D1) The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with a spindle No. 4 rotor at 30 rpm. -Marquardt 3331PR- Composition: Acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer ·Solid content 9.7% by mass ~ 10.7% by mass Viscosity at 25°C: 2,000mPa·s to 12,000mPa·s ·Weight average molecular weight 160,000 In general formula (D1), n:m:z=22.5:26.5:51 The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with a spindle No. 5 rotor at 30 rpm. -Marquardt 3940- Composition: Acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer ·Solid content 41% to 45% by mass Viscosity at 25°C: 1,500mPa·s to 4,500mPa·s ·Weight average molecular weight 150,000 n:m:z=31:29:40 in general formula (D1) The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25° C. with a spindle No. 3 rotor at 10 revolutions per minute.

[0061] The content of the copolymer of component (D) is preferably from 0.05% by mass to 0.8% by mass, more preferably from 0.1% by mass to 0.5% by mass, relative to the total amount of the skin cleanser composition, from the viewpoint of improving lather retention and non-stickiness on the skin after towel drying. When the content of the component (D) is 0.05% by mass or more relative to the total amount of the skin cleanser composition, a skin cleanser composition with good foam retention can be obtained.When the content of the component (D) is 0.8% by mass or less relative to the total amount of the skin cleanser composition, a skin cleanser composition with excellent non-stickiness on the skin after towel drying can be obtained.

[0062] <Other ingredients> In addition to the components (A), (B), (C), and (D), other components may be blended into the skin cleanser composition of the present invention, as necessary, within the scope of not impairing the effects of the present invention. Examples of the other components include surfactants other than component (A), water-soluble polymers other than components (B) and (D), oils, silicones, alcohols such as lower or higher alcohols, lanolin derivatives, protein derivatives, pharmaceuticals such as vitamins, disinfectants, preservatives, pH adjusters such as potassium hydroxide, citric acid, and hydrochloric acid, antioxidants, sequestering agents, UV absorbers, UV scattering agents, viscosity adjusters, animal and plant extracts or derivatives thereof, chelating agents such as edetic acid, colorants, fragrances, pigments, inorganic powders, clay minerals, water-insoluble polymer compound powders such as nylon and polyethylene, etc. These may be used alone or in combination of two or more. The other components may be appropriately synthesized or commercially available. The content of the other components in the skin cleanser composition is not particularly limited and can be appropriately selected depending on the purpose.

[0063] The oil is not particularly limited and can be appropriately selected depending on the purpose. Examples include vegetable oils and fats such as castor oil, olive oil, cacao oil, hardened palm oil, camellia oil, coconut oil, Japan wax, jojoba oil, grapeseed oil, and avocado oil, and ester compounds thereof; animal oils and fats 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; and esters such as glycerol tri-2-ethylhexanoate, 2-ethylhexyl stearate, butyl stearate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, octyldodecyl oleate, and cholesterol oleate. The concentration of the oil is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% or more and 10% or less.

[0064] The alcohols are not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include natural and synthetic higher alcohols such as cetyl alcohol, oleyl alcohol, stearyl alcohol, hexyldecanol, octyldodecanol, and lauryl alcohol.

[0065] The moisturizer is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include isoprene glycol, 1,2-pentanediol, diethylene glycol, diethylene glycol monoalkyl ether, polypropylene glycol, hydrogenated castor oil (30 E.O.), diglycerin, triglycerin, and polyglycerins. The concentration of the alcohols is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% or more and 10% or less.

[0066] The preservative is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include benzoates, sorbates, dehydroacetates, parahydroxybenzoates, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, 3,4,4'-trichlorocarbanilide, benzalkonium chloride, hinokitiol, resorcinol, methylchloroisothiazolinone-methylisothiazolinone solution (trade name: Cason CG, manufactured by Rohm and Haas Japan), salicylic acid, pentanediol, phenoxyethanol, ethanol, and the like. The concentration of the preservative is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% or more and 1% or less.

[0067] The antioxidant is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include dibutylhydroxytoluene, butylhydroxyanisole, and ascorbic acid. The concentration of the antioxidant is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% or more and 1% or less.

[0068] The chelating agent is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include disodium edetate, ethylenediaminetetraacetate, hexametaphosphate, and gluconic acid. The concentration of the chelating agent is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.1% or more and 1% or less.

[0069] The pH adjuster is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include sodium hydroxide, potassium hydroxide, citric acid, succinic acid, triethanolamine, aqueous ammonia, triisopropanolamine, phosphoric acid, and glycolic acid.

[0070] The ultraviolet absorber and the ultraviolet scattering agent are not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include 2-hydroxy-4-methoxybenzophenone, octyl dimethyl para-aminobenzoate, ethylhexyl para-methoxycinnamate, titanium oxide, kaolin, and talc.

[0071] The vitamins are not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include vitamin A, B vitamins, vitamin C, vitamin D, vitamin E, vitamin F, vitamin K, vitamin P, vitamin U, carnitine, ferulic acid, γ-oryzanol, α-lipoic acid, orotic acid, and derivatives thereof. The concentration of the vitamins is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.001% or more and 0.5% or less.

[0072] The amino acids are not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include glycine, alanine, valine, leucine, isoleucine, phenylalanine, tryptophan, cystine, cysteine, methionine, proline, hydroxyproline, aspartic acid, glutamic acid, arginine, histidine, lysine, and derivatives thereof. The concentration of the amino acids is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.001% or more and 0.5% or less.

[0073] <ph> The pH of the skin cleanser composition at 25°C is preferably 9.5 to 11.0, and more preferably 9.8 to 10.6. The method for measuring the pH is not particularly limited, and examples thereof include a method using a glass electrode color hydrogen ion concentration indicator HM-30R (manufactured by DKK-TOA Corporation, electrode type GST-5721).

[0074] <Viscosity> The viscosity of the skin cleanser composition at 25°C is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 4 mPa·s or more and 1,000 mPa·s or less, and more preferably 8 mPa·s or more and 500 mPa·s or less. When a foamer container described below is used, the viscosity of the skin cleanser composition at 25°C is preferably 4 mPa·s or more and 40 mPa·s or less, and more preferably 8 mPa·s or more and 30 mPa·s or less. The method for measuring the viscosity is not particularly limited, but examples include a method using a BM type viscometer (manufactured by Tokyo Keiki Co., Ltd.) to measure the viscosity after 1 minute at a sample temperature of 25°C, a rotation speed of 60 rpm, and a No. 3 rotor.

[0075] <Container> The container for storing the skin cleanser composition of the present invention is not particularly limited and can be appropriately selected depending on the purpose, but for example, a squeeze container, a pump container, or a foamer container is preferred.

[0076] -Pump container- Examples of the pump container include a pump dispenser container and a mist dispenser container. Examples of the pump dispenser container include product name: P1-1 (manufactured by Canyon Co., Ltd., discharge amount: 1 mL, nozzle diameter: 3.6 mm) and product name: P3.5BS (manufactured by Canyon Co., Ltd., discharge amount: 3.5 mL, nozzle diameter: 4.0 mm). Examples of the mist dispenser container include a product name: Z-35-ST(NT5) (manufactured by Mitani Valve Co., Ltd.).

[0077] -Former container- The foamer container can be a non-gas type foam-discharging container. The non-gas type foam-discharging container is not particularly limited as long as it can mix the skin cleanser composition of the present invention with air and discharge it in a foamed state, and can be appropriately selected depending on the purpose. Examples of the non-gas type foam-discharging container include a squeeze foamer container that can discharge foam by manually squeezing the bottle body, and a pump foamer container that can discharge foam by pressing down the nozzle. As the squeeze former container and the former container, for example, a former container manufactured by Yamato Seikan Co., Ltd., a former container manufactured by Yoshino Kogyosho Co., Ltd., or the like can be used.

[0078] The non-gas type foam-discharging container usually has a porous membrane for forming foam, and foam is formed when the 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, polyolefin, etc. are preferred.

[0079] The mesh of the porous membrane is not particularly limited and can be selected appropriately depending on the purpose, but for example, 100 mesh or more is preferred, 100 mesh to 400 mesh is more preferred, and 200 mesh to 350 mesh is even more preferred. The number of porous membrane bodies is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of improving foam performance, it is preferably 2 to 4. More specifically, the foamer containers described in JP-A-7-315463, JP-A-8-230961, and JP-A-2005-193972 can be suitably used.

[0080] <Manufacturing method> The method for producing the skin cleanser composition of the present invention is not particularly limited and can be appropriately selected depending on the purpose. The skin cleanser composition can be obtained by mixing the (A), (B), and (C) components, and, if necessary, the (D) component, the other components, and purified water (blended as the remainder so that the total skin cleanser composition becomes 100% by mass). Specifically, it can be produced as follows: Component (A) is dissolved in purified water heated to 70°C to 80°C, and component (C) is added. After cooling to 40°C or below, components (B) and (D) are added.

[0081] The skin cleanser composition may be prepared using an apparatus that is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include a stirring apparatus equipped with stirring blades that exert shear force and can mix the entire composition. The stirring blade is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include a propeller, a turbine, and a disperser.

[0082] <Application> The use of the skin cleanser composition is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include body shampoo, body soap, facial cleanser, hand soap, foam hand soap cleansing foam, and makeup remover. [Example]

[0083] The present invention will be explained in more detail below based on examples and comparative examples, but the present invention is not limited to these examples. The content of each component in the examples and comparative examples is shown in "mass %" and is a value converted into a pure content.

[0084] (Examples 1 to 25 and Comparative Examples 1 to 9) Skin cleansing compositions having the compositions and contents shown in Tables 1 to 7 below were prepared by the following method. Purified water in an amount equivalent to 95% by mass of the total amount of the final skin cleanser composition was heated to 70°C to 80°C, the anionic surfactant (A) was dissolved, and either (C) or a comparative component for (C) was added. The mixture was then cooled to 40°C or below, and either (B) or a comparative component for (B), (D) and other components were added to prepare a skin cleanser composition. If the pH was below the predetermined level, potassium hydroxide, a common component, was added to adjust the pH to 10.0, and purified water was added to bring the total volume to 100% by mass, yielding the skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9. A Three-One Motor (HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.) was used for stirring, and a propeller was used as the stirring blade. The pH of each of the obtained skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9 was measured at 25°C using a pH meter (HM-30R; manufactured by TOA DKK). The obtained skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9 were filled into a container with a pump dispenser (discharge volume 3 mL, nozzle diameter (inner diameter) 3.5 mm, manufactured by Yoshino Kogyosho Co., Ltd.).

[0085] The obtained skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9 were evaluated and judged for "foam retention," "non-stickiness on skin after towel drying," "sustained moist feeling on skin after towel drying," "sustained deodorizing effect," "skin texture after towel drying," and "low-temperature stability." The results are shown in Tables 1 to 7 below.

[0086] <Awamochi evaluation> Ten expert evaluators took five pumps (approximately 15 g) of the containered skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9 into their hands, washed their entire bodies, and then observed the foam retention and evaluated it based on the following evaluation criteria. The average scores of the 10 expert evaluators were calculated and evaluated based on the following evaluation criteria. [Evaluation criteria for foam retention] 4 points: After washing the whole body, most of the foam that was applied to the body at the beginning of the wash remains. 3 points: After washing the whole body, about 80% to 50% of the foam that was applied to the body at the beginning of the wash remains. 2 points: After washing the whole body, about 20% to 40% of the foam that was applied to the body at the beginning of the wash remains. 1 point: After washing the whole body, there is almost no foam left on the body at the beginning of the wash. [Criteria for determining foam retention] ◎: 3.5 points or more and 4.0 points or less ○: 3 points or more and less than 3.5 points △: 2 points or more but less than 3 points ×: 1 point or more but less than 2 points

[0087] <Evaluation of non-stickiness on skin after towel drying> Ten expert evaluators took five pumps (approximately 15 g) of the containered skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9 into their hands, rinsed them with warm water at 40°C, towel-dried them, and then left them to rest in a thermostatic chamber at 25°C for 30 minutes, and evaluated the "non-stickiness" based on the following evaluation criteria. The average scores of the 10 expert evaluators were calculated and judged based on the following criteria. [Evaluation criteria for non-stickiness on skin after towel drying] 4 points: No stickiness at all 3 points: Feels slightly sticky 2 points: Sticky feeling 1 point: Very sticky [Criteria for assessing non-stickiness of skin after towel drying] ◎: 3.5 points or more and 4.0 points or less ○: 3.0 points or more and less than 3.5 points △: 2.0 points or more and less than 3.0 points ×: Less than 2.0 points

[0088] <Evaluation of the duration of moisturizing feeling on the skin after towel drying> Ten expert evaluators took five pumps (approximately 15 g) of the containered skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9 into their hands, rinsed them with warm water at 40°C, towel-dried them, and then left them to rest in a thermostatic chamber at 25°C for 8 hours, after which the "moisturizing feeling" was evaluated based on the following evaluation criteria. The average scores of the 10 expert evaluators were calculated and judged based on the following criteria. [Evaluation criteria for the durability of moist feeling on skin after towel drying] 4 points: Very moist feeling 3 points: Feels moist 2 points: Slightly moist feeling 1 point: Not very moisturizing [Criteria for assessing the durability of moisturizing feeling on skin after towel drying] ◎: 3.5 points or more and 4.0 points or less ○: 3.0 points or more and less than 3.5 points △: 2.0 points or more and less than 3.0 points ×: Less than 2.0 points

[0089] <Evaluation of skin texture after towel drying> Ten expert evaluators took five pumps (approximately 15 g) of the containered skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9 into their hands, washed their entire bodies, rinsed with warm water at 40°C, and towel-dried. This was repeated once a day for seven days, after which the subjects were allowed to rest for 30 minutes in a thermostatic chamber at 25°C, and the "skin texture" on the seventh day compared to before washing on the first day was evaluated based on the following evaluation criteria. The average scores of the ten expert evaluators were calculated and evaluated based on the following criteria. [Evaluation criteria for skin texture after towel drying] 4 points: Skin texture feels very fine and even 3 points: Skin texture feels slightly finer and more even 2 points: No change in skin texture 1 point: Skin texture is very rough and the surface feels uneven [Criteria for assessing skin texture after towel drying] ◎: 3.5 points or more and 4.0 points or less ○: 3 points or more and less than 3.5 points △: 2 points or more but less than 3 points ×: 1 point or more but less than 2 points

[0090] <Evaluation of deodorizing durability> Five expert evaluators suffering from dry skin exercised on fitness bikes in a high-temperature environment (38°C, 40% RH) for 30 minutes. Afterwards, they took five pumps (approximately 15 g) of the skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9 from their containers into their hands, washed their entire bodies, rinsed them with warm water at 40°C, towel-dried them, and then left them to rest in a thermostatic chamber at 25°C for 8 hours. The "durability of deodorizing sweat and sebum odors" was evaluated based on the following evaluation criteria. The average scores of the five expert evaluators were calculated and rated based on the following criteria. [Evaluation criteria for deodorizing durability] 4 points: No smell from underarms or trunk 3 points: A slight odor is detected from the armpits and trunk 2 points: The odor from the armpits and trunk is somewhat strong 1 point: Strong odor from armpits and trunk [Criteria for determining deodorizing durability] ◎: 3.5 points or more and 4.0 points or less ○: 3.0 points or more and less than 3.5 points △: 2.0 points or more and less than 3.0 points ×: Less than 2.0 points

[0091] <Evaluation of low temperature stability> The skin cleanser compositions of Examples 1 to 25 and Comparative Examples 1 to 9 were placed in cylindrical transparent glass bottles with a diameter of 4 cm and a height of 7.5 cm, and stored in a thermostatic chamber at -5°C for 2 weeks. The state of precipitate formation after storage was evaluated based on the following evaluation criteria. [Criteria for low temperature stability] ◎: No crystals or solids precipitated after 2 weeks of storage 〇: After 2 weeks of storage, almost no crystals or solids were precipitated (no functional problems) ×: After 2 weeks of storage, a large amount of crystals or solids precipitated.

[0092] [Table 1]

[0093] [Table 2]

[0094] [Table 3]

[0095] [Table 4]

[0096] [Table 5]

[0097] [Table 6]

[0098] [Table 7]

[0099] (Prescription Examples 1-6) A skin cleanser composition having the composition and content shown in Table 8 below was prepared in the same manner as in Example 1.

[0100] [Table 8]

[0101] Details of each component used in Examples 1 to 25, Comparative Examples 1 to 9, and Formulation Examples 1 to 6 are shown in Table 9 below.

[0102] [Table 9] *1: Potassium laurate was prepared by neutralizing lauric acid (NAA-122, manufactured by NOF Corporation) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.). *2: Potassium myristate was prepared by neutralizing myristic acid (NAA-142, manufactured by NOF Corporation) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.). *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.). *5: Appropriately selected from fragrances A to D described in paragraphs

[0065] to

[0071] of JP 2002-128658 A, fragrances A to E described in paragraphs

[0076] to

[0088] of JP 2003-73249 A, or blended fragrance compositions 1 to 4 described in paragraphs

[0016] to

[0023] of JP 2020-132680 A. [Industrial Applicability]

[0103] The skin cleanser composition of the present invention is excellent in long-lasting deodorizing effect against odors caused by sweat, sebum, etc., skin texture after towel drying, long-lasting moist feeling on the skin after towel drying, non-stickiness on the skin after towel drying, and low-temperature stability, and therefore can be suitably used in, for example, body shampoo, body soap, facial cleanser, hand soap, foam hand soap cleansing foam, makeup remover, etc.< / ph>

Claims

1. (A) an anionic surfactant; (B) a cationic polymer represented by the following general formula (B1), (C) at least one selected from highly branched cyclic dextrins and hydroxyalkylated cyclodextrins, a mass ratio [{(B)+(C)} / (A)] of the sum of the contents of the component (B) and the component (C) to the content of the component (A) is 0.01 or more and 0.05 or less. 【Chemical 1】 (In the general formula (B1), n ​​and m represent the molar ratio (mol %) of each structural unit, n is 0 to 35, m is 65 to 100, and n+m=100.)

2. The skin cleanser composition according to claim 1, comprising (D) a copolymer represented by the following general formula (D1): 【Chemistry 2】 In the general formula (D1), n, m, and z represent the molar ratio (mol %) of each structural unit, where n+m+z=100, n is 0 to 34, m is 24 to 31, and z is 35 to 76.

3. the content of the component (A) is 12% by mass or more and 24% by mass or less based on the total amount of the 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 skin cleanser composition, 3. The skin cleanser composition according to claim 1, wherein the content of the component (C) is 0.03% by mass or more and 0.1% by mass or less, based on the total amount of the skin cleanser composition.

4. 4. The skin cleanser composition according to claim 2, wherein the content of the component (D) is 0.1% by mass or more and 0.5% by mass or less, based on the total amount of the skin cleanser composition.

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