Skin cleansing composition

Abstract

The present invention provides a skin cleansing composition containing an internal olefin sulfonic acid or a salt thereof, the skin cleansing composition having good low-temperature stability and dischargeability.　The present invention pertains to a skin cleansing composition containing the following components (A), (B), and (C): (A) an internal olefin sulfonic acid or a salt thereof; (B) an alkyl ether carboxylic acid or a salt thereof; and (C) a cationic polymer, the mass ratio ((A + B) / C) of the total amount of components (A) and (B) to component (C) being 1 or more and less than 50.

Description

Cleanser composition for skin

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

[0002] Internal olefin sulfonates have conventionally been used in various detergent compositions because they can exert excellent effects as anionic surfactants. Patent Document 1 describes a detergent composition for skin or hair containing an internal olefin sulfonate and a cationic polymer or amphoteric polymer. While these compositions allow the use of various other surfactants, they aim to improve the feel during application to hair and skin while enhancing foam persistence and rinsing performance. In Patent Document 2, it is described that by combining an alkyl ether carboxylic acid or a salt thereof with the above component, the resulting composition is excellent in foam quality and foam volume, causes less sliminess during rinsing, can impart a squeaky feel similar to soap, and leaves the skin after washing without a tight feeling, thus providing a good feel to the skin. In these patent documents, evaluations of foam and rinsing are performed by lathering the detergent composition on hands or hair, but in recent years, lathering using a foam-dispensing container such as a pump foamer has been becoming mainstream.

[0003] (Patent Document 1) Japanese Unexamined Patent Publication No. 2015-27975 (Patent Document 2) Japanese Unexamined Patent Publication No. 2014-76982

[0004] The present invention relates to a cleanser composition for skin, comprising the following components (A), (B) and (C): (A) an internal olefin sulfonic acid or a salt thereof; (B) an alkyl ether carboxylic acid or a salt thereof; (C) a cationic polymer, wherein the mass ratio of the total amount of components (A) and (B) to component (C) ((A+B) / C) is 1 or more and less than 50. Detailed Description of the Invention

[0005] Unless otherwise specified, terms used in the present specification have the meanings commonly used in the art.

[0006] While internal olefin sulfonates can impart various excellent foaming properties to compositions, their hydrophobicity increases and their melting point rises as their carbon chain length increases, leading to a tendency for precipitation and a decrease in the low-temperature stability of the composition. However, none of the aforementioned patent documents have considered how to impart good low-temperature stability, and there is still room for improvement.

[0007] The inventors have discovered that by incorporating internal olefin sulfonate or its salt, alkyl ether carboxylic acid or its salt, and a cationic polymer in a specific mass ratio, the product exhibits good low-temperature stability and dispensing properties, and, quite unexpectedly, excellent foaming performance, particularly an increase in foam rather than a decrease during washing. Furthermore, it also provides good rinsing performance and a pleasant skin feel after washing.

[0008] The skin cleansing composition of the present invention has good low-temperature stability, excellent foaming performance, particularly an effect where foam increases rather than decreases during the washing operation, and also good rinsing performance. The skin cleansing composition of the present invention has good low-temperature stability, good dispensing properties, and quite unexpectedly, excellent foaming performance, particularly an effect where foam increases rather than decreases during the washing operation, and also good rinsing performance.

[0009] The present invention relates to a skin cleansing composition, and one embodiment thereof is a skin cleansing composition containing the following components (A), (B), and (C): (A) internal olefin sulfonate or a salt thereof; (B) alkyl ether carboxylic acid or a salt thereof; and (C) a cationic polymer, wherein the mass ratio ((A + B) / C) of the total amount of components (A) and (B) to component (C) is 1 or more and less than 50.

[0010] Component (A) of the present invention is an internal olefin sulfonate or a salt thereof. In the present invention, the internal olefin sulfonate is a sulfonate obtained by sulfonating, neutralizing, and hydrolyzing an internal olefin (an olefin having a double bond inside the carbon chain), which is the raw material. Note that the term "internal olefin" is a broad term that also includes cases where a trace amount of so-called α-olefin, in which the double bond is located at position 1 of the carbon chain, is present. That is, when an internal olefin is sulfonated, β-sartone is quantitatively produced, and a portion of the β-sartone is converted into γ-sartone and olefin sulfonate, which are further converted into hydroxyalkane sulfonate and olefin sulfonate in the neutralization and hydrolysis process (for example, J. Am. Oil Chem. Soc. 69, 39 (1992)). Here, the hydroxyl group of the obtained hydroxyalkane sulfonate is inside the carbon chain, and the double bond of the olefin sulfonate is inside the carbon chain. Furthermore, the resulting product is mainly a mixture of these, and in part, a trace amount of hydroxyalkane sulfonates having a sulfonic acid group at the end of the carbon chain, or olefin sulfonates having a sulfonic acid group at the end of the carbon chain, may be included due to the sulfonation of α-olefins present in trace amounts in the raw material olefin. In this specification, each of these products and mixtures thereof are collectively referred to as internal olefin sulfonates or their salts (component (A)). Hydroxyalkane sulfonates are also referred to as the hydroxy derivative of internal olefin sulfonates, and olefin sulfonates are also referred to as the olefin derivative of internal olefin sulfonates. The content of raw material olefins (α-olefins) with a double bond at position 1, which may inevitably be present in the raw material olefin that is the starting material for internal olefin sulfonates or their salts of component (A), is preferably less than 5.0% by mass, more preferably less than 3.0% by mass, and even more preferably less than 2.5% by mass. Furthermore, it can be reasonably inferred that the position of the sulfonic acid group in the internal olefin sulfonic acid or its salt obtained by sulfonating the raw olefin corresponds almost exactly to the position of the double bond in the raw olefin.Therefore, in this invention, the content of terminal olefin sulfonate contained in component (A) is defined based on the value of the double bond position in the raw material olefin, which is the starting material.

[0011] The carbon number of internal olefin sulfonic acid or its salt in component (A) is preferably 12 or more, more preferably 14 or more, and even more preferably 16 or more, from the viewpoint of low-temperature stability, dischargeability, foam quality, lathering, rinsability, and skin feel after washing. From a similar viewpoint, the carbon number of internal olefin sulfonic acid or its salt in component (A) is preferably 24 or less, more preferably 20 or less, and even more preferably 18 or less. Specifically, 12 to 24 is preferred, 14 to 20 is more preferred, and 16 to 18 is even more preferred. These hydroxyl and olefin compounds having various carbon numbers are derived from the internal olefin used as a raw material, and may also include hydroxyl and olefin compounds having carbon numbers other than those mentioned above. Examples of internal olefin sulfonic acid or its salt in component (A) include alkali metal salts such as sodium salts and potassium salts, and ammonium salts. Component (A) can be one or more types, and its content is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, even more preferably 3.3% by mass or more, and even more preferably 3.6% by mass or more, from the viewpoint of the feeling of foam increasing, rinsability, foam thickness, foam whiteness, and skin feel after washing, in the total composition. Furthermore, from the viewpoint of the feeling of foam increasing, low temperature stability, and rinsability, it is preferably 13% by mass or less, more preferably 8.0% by mass or less, even more preferably 5.5% by mass or less, and even more preferably 4.7% by mass or less, in the total composition. Specifically, it is preferably 0.5% by mass or more and 13% by mass or less, more preferably 1.0% by mass or more and 8.0% by mass or less, even more preferably 3.3% by mass or more and 5.5% by mass or less, and even more preferably 3.6% by mass or more and 4.7% by mass or less, in the total composition.

[0012] Component (B) of the present invention is an alkyl ether carboxylic acid or a salt thereof. (B) The alkyl ether carboxylic acid or a salt thereof is the general formula (1)

[0013]

[0014] (In the formula, R １ Examples include polyoxyethylene alkyl ether carboxylic acids or salts thereof represented by (where is an alkyl group having 4 to 22 carbon atoms, n is the average number of moles added and is a number from 0 to 20, and X represents a hydrogen atom, alkali metal, alkaline earth metal, ammonium, or organic ammonium). In general formula (1), R １ From the viewpoint of improving lathering, rinsability, foam thickness, and foam whiteness, and reducing skin irritation, alkyl groups having 12 to 16 carbon atoms are preferred, and alkyl groups having 12 to 14 carbon atoms are more preferred. Also from the above viewpoint, the average number of moles of ethylene oxide added, n, is preferably 1 to 10, and more preferably 3 to 5. Examples of X include hydrogen atoms; alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine; and ammonium derived from basic amino acids such as arginine and lysine. Of these, from the above viewpoint, it is preferable to include one or more selected from sodium, potassium, triethanolamine, and arginine, and more preferably to include one or more selected from sodium and potassium. Specifically, such polyoxyethylene alkyl ether carboxylic acids or salts thereof preferably include one or more selected from polyoxyethylene lauryl ether carboxylic acid or salts thereof, polyoxyethylene myristyl ether carboxylic acid or salts thereof, and polyoxyethylene palmityl ether carboxylic acid or salts thereof; more preferably include one or more selected from polyoxyethylene lauryl ether carboxylic acid or salts thereof and polyoxyethylene myristyl ether carboxylic acid or salts thereof; even more preferably include polyoxyethylene lauryl ether carboxylic acid or salts thereof; and even more preferably include polyoxyethylene (2) to (5) lauryl ether carboxylic acid salts (such as laureth-6 carboxylic acid salts and laureth-4 carboxylic acid salts).

[0015] Component (B) can be one or more types, and its content is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1.3% by mass or more, and even more preferably 1.7% by mass or more, from the viewpoint of the feeling of increasing foam, skin tightness, and low-temperature stability. Furthermore, from the viewpoint of the feeling of increasing foam, low-temperature stability, and rinsability, it is preferably 8.0% by mass or less, more preferably 5.0% by mass or less, even more preferably 3.5% by mass or less, even more preferably 2.7% by mass or less, and even more preferably 2.2% by mass or less, from the viewpoint of the feeling of increasing foam, low-temperature stability, and rinsability. Specifically, it is preferably 0.1% by mass or more and 8.0% by mass or less, more preferably 0.5% by mass or more and 5.0% by mass or less, even more preferably 1.3% by mass or more and 3.5% by mass or less, even more preferably 1.3% by mass or more and 2.7% by mass or less, and even more preferably 1.7% by mass or more and 2.2% by mass or less, from the viewpoint of the feeling of increasing foam, skin tightness, and low-temperature stability. The mass ratio (A / B) of component (A) to component (B) is preferably 0.1 or higher, more preferably 0.5 or higher, even more preferably 1.0 or higher, even more preferably 1.5 or higher, even more preferably 1.6 or higher, and even more preferably 1.8 or higher, from the viewpoint of the feeling of foam increasing, skin tightness, and low-temperature stability. Also, from the same viewpoint, it is preferably 8.0 or lower, more preferably 6.0 or lower, even more preferably 4.0 or lower, even more preferably 3.0 or lower, even more preferably 2.7 or lower, and even more preferably 2.3 or lower. Specifically, it is preferably 0.1 to 8.0, more preferably 0.5 to 6.0, even more preferably 1.0 to 4.0, even more preferably 1.5 to 3.0, even more preferably 1.6 to 2.7, and even more preferably 1.8 to 2.3.

[0016] Component (C) of the present invention is a cationic polymer. Examples of cationic polymers (C) include one or more selected from cationized polygalactomannan, cationized hydroxyalkylcellulose, diallylquaternary ammonium salt polymer, copolymer containing methacrylamidopropyltrimethylammonium chloride, quaternary dialkylaminoalkyl (meth)acrylate polymer, and crosslinked cationic polymer. More specifically, examples of cationized polygalactomannan include one or more selected from cationized guar gum, cationized tara gum, and cationized locust bean gum. More specifically, examples of cationized hydroxyalkylcellulose include one or more selected from cationized hydroxyethylcellulose and cationized hydroxypropylcellulose. More specifically, examples of diallylquaternary ammonium salt polymer include one or more selected from polydiallyldimethylammonium chloride, diallyldimethylammonium chloride / acrylic acid copolymer, diallyldimethylammonium chloride / acrylamide copolymer, and diallyldimethylammonium chloride / acrylic acid / acrylamide copolymer. Copolymers containing methacrylamidopropyltrimethylammonium chloride include one or more selected from acrylic acid / methyl acrylate / methacrylamidopropyltrimethylammonium chloride copolymers and acrylic acid / acrylamide / methacrylamidopropyltrimethylammonium chloride copolymers. Quaternary dialkylaminoalkyl (meth)acrylate polymers include one or more selected from vinylpyrrolidone / N,N-dimethylaminoethyl methacrylate diethyl sulfate copolymers and N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymers.As for component (C), from the viewpoint of increasing foam and rinsability, cationized polygalactomannan, diallyl quaternary ammonium salt polymer, and quaternary dialkylaminoalkyl (meth)acrylate polymer are preferred, and from the viewpoint of dischargeability, diallyl quaternary ammonium salt polymer and quaternary dialkylaminoalkyl (meth)acrylate polymer are more preferred, and diallyl quaternary ammonium salt polymer is even more preferred. Specifically, guar hydroxypropyltrimonium chloride, polyquaternium-7, polyquaternium-11, and polyquaternium-39 are preferred, polyquaternium-7, polyquaternium-11, and polyquaternium-39 are more preferred, and polyquaternium-39 is even more preferred. Component (C) can be one or more types, and its content is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, and even more preferably 0.17% by mass or more, from the viewpoint of foam thickness, presence, foam whiteness, rinsability, and the feeling of foam increasing, in the total composition. Furthermore, from the viewpoint of rinsability, the feeling of foam increasing, and discharge, it is preferably 1.5% by mass or less, more preferably 1.0% by mass or less, even more preferably 0.7% by mass or less, even more preferably 0.4% by mass or less, and even more preferably 0.25% by mass or less, in the total composition. Specifically, it is preferably 0.01% by mass or more and 1.5% by mass or less, more preferably 0.05% by mass or more and 1.0% by mass or less, even more preferably 0.10% by mass or more and 0.7% by mass or less, even more preferably 0.17% by mass or more and 0.4% by mass or less, and even more preferably 0.17% by mass or more and 0.25% by mass or less, in the total composition.

[0017] In the skin cleansing composition of the present invention, from the viewpoint of low-temperature stability and dispensing properties, foam thickness, rinsability, foam whiteness, and the feeling of foam increasing, the mass ratio ((A+B) / C) of the total amount of components (A) and (B) to component (C) is 1 or more, preferably 5 or more, more preferably 10 or more, even more preferably 15 or more, even more preferably 20 or more, even more preferably 24 or more, and even more preferably 27 or more. From a similar viewpoint, ((A+B) / C) is less than 50, preferably 45 or less, more preferably 35 or less, and even more preferably 32 or less. Specifically, it is 1 or more and less than 50, more preferably 5 or more and 45 or less, even more preferably 10 or more and 45 or less, even more preferably 15 or more and 35 or less, even more preferably 20 or more and 35 or less, even more preferably 24 or more and 32 or less, and even more preferably 27 or more and 32 or less.

[0018] In addition to the components mentioned above, the skin cleansing composition of the present invention may further contain (D) an amphoteric surfactant, (E) one or more anionic surfactants other than components (A) and (B), and (F) a nonionic surfactant. Examples of (D) amphoteric surfactants include betaine-based surfactants such as imidazoline betaine, alkyldimethylaminoacetic acid betaine, fatty acid amidopropyl betaine, and sulfobetaine, or amine oxide-type surfactants such as alkyldimethylamine oxide. Of these, fatty acid amidopropyl betaine and sulfobetaine are preferred from the viewpoint of foam quality, foam performance (foaming, rinsability, foam thickness, foam whiteness), skin feel after washing, and low-temperature stability, and fatty acid amidopropyl betaine is more preferred. Specifically, coconut oil fatty acid amidopropyl betaine, or lauric acid amidopropyl betaine, lauryl hydroxysulfobetaine, or 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine is preferred, coconut oil fatty acid amidopropyl betaine or lauric acid amidopropyl betaine is more preferred, and lauric acid amidopropyl betaine is even more preferred. Component (D) can be one or more types, and its content is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, more preferably 2.0% by mass or more, even more preferably 2.3% by mass or more, and even more preferably 2.6% by mass or more, from the viewpoint of low-temperature stability and foam quality. Furthermore, from the viewpoint of foaming, skin feel after washing, and rinsability, it is preferably 5.0% by mass or less, more preferably 4.5% by mass or less, more preferably 3.9% by mass or less, even more preferably 3.6% by mass or less, and even more preferably 3.3% by mass or less, from the viewpoint of foaming, skin feel after washing, and rinsability. Specifically, the total composition is preferably 0.5% by mass or more and 5.0% by mass or less, more preferably 1.0% by mass or more and 4.5% by mass or less, more preferably 2.0% by mass or more and 3.9% by mass or less, even more preferably 2.0% by mass or more and 3.6% by mass or less, even more preferably 2.0% by mass or more and 3.3% by mass or less, even more preferably 2.3% by mass or more and 3.3% by mass or less, and even more preferably 2.6% by mass or more and 3.3% by mass or less.

[0019] An anionic surfactant other than components (A) and (B) (component (E)) can be one or more selected from alkyl sulfates, polyoxyalkylene alkyl ether sulfates, alkyl sulfosuccinate salts, polyoxyalkylene alkyl sulfosuccinate salts, fatty acid salts, N-acyl amino acid salts, N-acyl taurate salts, and acyl isethionate salts. Of these, one or more selected from polyoxyalkylene alkyl ether sulfates, N-acyl amino acid salts, and N-acyl taurate salts are more preferred from the viewpoint of foam quality, foam feel, skin feel after washing, and smoothness after rinsing. Furthermore, polyoxyalkylene alkyl ether sulfates such as polyoxyethylene alkyl ether sulfate, N-acyl amino acid salts such as N-acyl glutamate, N-cocoyl glutamate, and alkyl sarcosine salt, and N-acyl taurine salts such as N-acyl methyl taurine salt are preferred, and polyoxyethylene (1) to (4) lauryl ether ammonium sulfate (such as laureth-1 ammonium sulfate and laureth-2 ammonium sulfate), N-acyl glutamate, lauroyl sarcosine salt, and N-acyl methyl taurine salt are more preferred. The content of anionic surfactant (E) other than components (A) and (B) in the skin cleansing composition of the present invention is preferably 0.05% by mass or more in the total composition from the viewpoint of foam quality, skin feel after washing, and smoothness after rinsing. Also, from the same viewpoint, it is preferably 15% by mass or less in the total composition, more preferably 12% by mass or less, and even more preferably 10% by mass or less. Specifically, the total composition is preferably 0.05% to 15% by mass, more preferably 0.05% to 12% by mass, and even more preferably 0.05% to 10% by mass.

[0020] (F) Examples of nonionic surfactants include polyoxyethylene-added nonionic surfactants such as polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, and polyoxyalkylene (hydrogenated) castor oil; polyhydric alcohol-type nonionic surfactants such as sucrose fatty acid esters, polyglycerin alkyl ethers, alkyl glyceryl ethers, polyglycerin fatty acid esters, alkyl glycosides, alkyl polyglucosides, and sorbitan fatty acid esters; and fatty acid alkanolamides. Of these, from the viewpoint of foaming, skin feel after washing, and smoothness after rinsing, one or more selected from polyoxyethylene-added nonionic surfactants, alkyl glyceryl ethers, alkyl polyglucosides, and fatty acid alkanolamides are preferred, and polyoxyethylene-added nonionic surfactants such as polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene fatty acid esters, and polyoxyethylene alkyl ethers are more preferred, alkyl glyceryl ethers such as 2-ethylhexylglycerin and isodecyl glyceryl ethers, alkyl polyglucosides such as alkyl (C10-16) polyglucosides, and fatty acid alkanolamides such as coconut oil fatty acid N-methylethanolamide are more preferred. From the viewpoint of foaming, skin feel after washing, and smoothness after rinsing, the content of nonionic surfactants in the skin cleansing composition is preferably 0.01% by mass or more, and more preferably 0.05% by mass or more, in the total composition. Furthermore, from a similar viewpoint, the total composition is preferably 15% by mass or less, more preferably 12% by mass or less, and even more preferably 10% by mass or less. Specifically, the total composition is preferably 0.01% by mass or more and 15% by mass or less, more preferably 0.01% by mass or more and 12% by mass or less, and even more preferably 0.05% by mass or more and 10% by mass or less.

[0021] In addition to the above-mentioned components, the skin cleansing composition of the present invention may also use components commonly used in ordinary skin cleansing compositions. Examples include surfactants other than those mentioned above; polyhydric alcohols; lower alcohols such as ethanol and isopropyl alcohol; aromatic alcohols such as benzyl alcohol and benzyloxyethanol; cellosolves such as ethyl cellosolve and butyl cellosolve; carbitols such as ethyl carbitol and butyl carbitol; moisturizing ingredients such as sugars (derivatives), amino acids (derivatives), animal and plant (protein) derivatives, and animal and plant extracts; silicone derivatives such as polyoxyalkylene-modified silicones; inorganic or organic salts such as sodium sulfate, sodium carbonate, sodium bicarbonate, potassium chloride, sodium chloride, and sodium citrate; pH adjusters such as acids and alkalis; anti-inflammatory agents such as glycyrrhetinic acid, glycyrrhizic acid and their derivatives; bactericidal agents such as isopropylmethylphenol; preservatives, metal ion chelating agents, antioxidants, ultraviolet absorbers, anionic polymers, nonionic polymers, amphoteric polymers, fragrances, thickeners, vitamins, natural pigments, tar dyes, and other colorants.

[0022] The polyhydric alcohol is not particularly limited as long as it is commonly used in skin cleansing compositions, and examples include dihydric alcohols such as ethylene glycol, diethylene glycol, hexylene glycol, polyethylene glycol, propylene glycol, 1,3-propanediol, dipropylene glycol, polypropylene glycol, isoprene glycol, and 1,3-butylene glycol; trihydric or higher alcohols such as glycerin, diglycerin, triglycerin, tetraglycerin, hexaglycerin, decaglycerin, and trimethylolpropane; and sugars or sugar alcohols such as erythritol, pentaerythritol, dipentaerythritol, glucose, mannose, galactose, sucrose, fructose, maltose, maltitol, xylitol, inositol, sorbitan, and sorbitol.

[0023] The anionic polymer is not particularly limited as long as it is used in ordinary skin cleansing compositions, and examples include homopolymers or copolymers containing at least one component selected from the group consisting of hyaluronic acid, carboxyvinyl polymer, carboxymethylcellulose, acrylic acid, methacrylic acid, styrene sulfonic acid, acroyldimethyltaurine, acroyldimethyltaurine ammonium, alginic acid, aspartic acid, chondroitin sulfate, polyglutamic acid, and salts thereof.

[0024] The nonionic polymer is not particularly limited as long as it is used in ordinary skin cleansing compositions, and examples include vinyl-based thickeners such as polyvinyl alcohol, polyvinylpyrrolidone, and polyvinyl methyl ether; cellulose-based thickeners such as methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, and hydrophobized hydroxypropylmethylcellulose; guar gum, sclerotium gum, tamarind gum, xanthan gum, dextran, pectin, pullulan, gelatin, locust bean gum, carrageenan, agar, biosaccharide gum, dextrin fatty acid ester, polyethylene glycol, and hydrophobically modified polyether urethane.

[0025] The pH of the skin cleansing composition of the present invention is preferably 10 or less, more preferably 9.0 or less, even more preferably 8.5 or less, and even more preferably 7.5 or less, from the viewpoint of foam quality, skin feel, the feeling of foam increasing, and rinsability. Also, from the same viewpoint, the pH is preferably 3.5 or higher, more preferably 4.0 or higher, and even more preferably 4.5 or higher. Specifically, 3.5 to 10 is preferred, 4.0 to 9.0 is preferred, 4.5 to 8.5 is even more preferred, and 4.5 to 7.5 is even more preferred. In the present invention, the pH is determined by filling a beaker with 200 mL of the liquid cleansing composition (undiluted or diluted 20 times with deionized water) and immersing a pH measuring electrode in it for 1 minute at 25°C.

[0026] The present invention relates to a liquid cleansing agent composition, preferably in a form that is applied to the skin in liquid form, or, from the viewpoint of foam quality and rinsability, preferably a liquid cleansing agent composition that is filled into a foam dispensing container and dispensed as foam. The foam dispensing container is not particularly limited, but from the viewpoint of ease of recycling and environmental friendliness because it does not use propellants, a non-gas type foam dispensing container is preferred. In this specification, a non-gas type foam dispensing container means a non-aerosol type foam dispensing container other than an aerosol type that uses propellants, and refers to a container that can mix the composition filled in the dispensing container with air and dispense it as foam. Specifically, examples include pump foamer containers, squeeze foamer containers, trigger spray containers, etc., but among these, a liquid cleansing agent composition that is filled into a pump foamer and dispensed as foam is more preferred. Here, liquid refers to a substance with a viscosity of 100,000 mPa·s or less at 30°C.

[0027] The skin cleansing composition of the present invention can be manufactured by mixing the above components according to a conventional method to form a liquid composition, and then filling it into a container that can dispense the liquid or a pump foamer container that can dispense the foam.

[0028] The skin cleansing compositions of the present invention are intended to cleanse the face, hands, feet, scalp, and the skin of the entire body.

[0029] Another aspect of the present invention is a skin cleansing method in which the skin cleansing composition is applied to the skin to cleanse it, and then rinsed with water. Specifically, it is preferable to apply the skin cleansing composition in liquid form to the skin to cleanse the skin, and then rinse with water, or to rinse with hard water, or to dispense the skin cleansing composition as foam, cleanse the skin with the dispensed foam, and then rinse with tap water. The water used herein may be any water containing divalent metal ions, and preferably water containing one or more divalent metal ions selected from calcium ions and magnesium ions. From the viewpoint of forming a film on the surface of human skin that has a moist, smooth, and glossy feel, the content of divalent metal ions in hard water is preferably 1 ppm by mass or more, more preferably 5 ppm by mass or more, and even more preferably 20 ppm by mass or more, in terms of American hardness. There is no particular upper limit to the content of divalent metal ions in hard water, but from the viewpoint of maintaining foam quality and preventing the precipitation of surfactants, it is preferable to have 1000 ppm by mass or less, and more preferably 500 ppm by mass or less, in terms of US hardness. Specifically, it is preferable to have 1 ppm by mass or more and 1000 ppm by mass or less, more preferably 5 ppm by mass or more and 500 ppm by mass or less, and even more preferably 20 ppm by mass or more and 500 ppm by mass or less. Examples of water containing divalent metal ions include tap water, well water, and natural water, but among these, the use of tap water is preferred. With this washing method, the effect of not having stickiness when drying and giving the skin a moist and smooth feeling after drying can be more easily experienced.

[0030] With respect to the embodiments described above, the present invention further discloses the following embodiments: <1> A skin cleansing composition comprising the following components (A), (B), and (C): (A) an internal olefin sulfonate or a salt thereof (B) an alkyl ether carboxylic acid or a salt thereof (C) a cationic polymer, wherein the mass ratio ((A + B) / C) of the total amount of components (A) and (B) to component (C) is 1 or more and less than 50. <2> The skin cleansing composition according to <1>, wherein the carbon number of component (A) is preferably 12 or more and 24 or less, more preferably 14 or more and 20 or less, and even more preferably 16 or more and 18 or less. <3> The skin cleansing composition according to <1> or <2>, wherein the content of component (A) is preferably 0.5% by mass or more and 13% by mass or less, more preferably 1% by mass or more and 8% by mass or less, even more preferably 3.3% by mass or more and 5.5% by mass or less, and even more preferably 3.6% by mass or more and 4.7% by mass or less. <4> The skin cleansing composition according to any one of <1> to <3>, wherein the content of raw material olefin (α-olefin) with a double bond at position 1, which may inevitably be present in the raw material olefin that is the starting material for the internal olefin sulfonic acid or salt thereof of component (A), is preferably less than 5.0% by mass, more preferably less than 3.0% by mass, and even more preferably 2.5% by mass or less in the raw material olefin. <5> The skin cleansing composition according to any one of <1> to <4>, wherein component (B) comprises at least one selected from polyoxyethylene lauryl ether carboxylic acid or a salt thereof, polyoxyethylene myristyl ether carboxylic acid or a salt thereof, and polyoxyethylene palmityl ether carboxylic acid or a salt thereof. <6> The skin cleansing composition according to any one of <1> to <5>, wherein the average number of moles n of ethylene oxide added to component (B) is preferably 1 to 10, and more preferably 3 to 5. <7> A skin cleansing composition according to any one of <1> to <6>, wherein the content of component (B) is preferably 0.1% by mass or more and 8.0% by mass or less, more preferably 0.5% by mass or more and 5.0% by mass or less, even more preferably 1.3% by mass or more and 3.5% by mass or less, even more preferably 1.3% by mass or more and 2.7% by mass or less, and even more preferably 1.7% by mass or more and 2.2% by mass or less.<8> A skin cleansing composition according to any one of <1> to <7>, wherein the mass ratio (A / B) of component (A) to component (B) is preferably 0.1 or more and 8.0 or less, more preferably 0.5 or more and 6.0 or less, even more preferably 1.0 or more and 4.0 or less, even more preferably 1.5 or more and 3.0 or less, even more preferably 1.6 or more and 2.7 or less, and even more preferably 1.8 or more and 2.3 or less. <9> A skin cleansing composition according to any one of <1> to <8>, wherein component (C) comprises at least one cationic polymer selected from dimethyldiallylammonium chloride polymer, dimethyldiallylammonium chloride-acrylic acid copolymer, vinylpyrrolidone-dimethylaminoethyl methacrylate copolymer, cationized cellulose, and cationized guar gum. <10> A skin cleansing composition according to any one of <1> to <9>, wherein the content of component (C) is preferably 0.01% by mass or more and 1.5% by mass or less, more preferably 0.05% by mass or more and 1% by mass or less, even more preferably 0.10% by mass or more and 0.7% by mass or less, even more preferably 0.17% by mass or more and 0.4% by mass or less, and even more preferably 0.17% by mass or more and 0.25% by mass or less. <11> A skin cleansing composition according to any one of <1> to <10>, wherein the mass ratio ((A + B) / C) of the total amount of components (A) and (B) to component (C) is 1 or more and less than 50, more preferably 5 or more and 45 or less, even more preferably 10 or more and 45 or less, even more preferably 15 or more and 35 or less, even more preferably 20 or more and 35 or less, even more preferably 24 or more and 32 or less, and even more preferably 27 or more and 32 or less. <12> A skin cleansing composition according to any one of <1> to <11>, further comprising (D) one or more selected from anionic surfactants other than components (A) and (B), (E) amphoteric surfactants, and (F) nonionic surfactants. <13> A skin cleansing composition according to <11> or <12>, wherein component (D) is preferably one or more selected from betaine-based surfactants and amine oxide-type surfactants, more preferably one or more selected from fatty acid amidopropyl betaine and sulfobetaine, and even more preferably fatty acid amidopropyl betaine.<14> A skin cleansing composition according to any one of <11> to <13>, wherein the content of component (D) is preferably 0.5% by mass or more and 5.0% by mass or less in the total composition, more preferably 1.0% by mass or more and 4.5% by mass or less, more preferably 2.0% by mass or more and 3.9% by mass or less, even more preferably 2.0% by mass or more and 3.6% by mass or less, even more preferably 2.0% by mass or more and 3.3% by mass or less, even more preferably 2.3% by mass or more and 3.3% by mass or less. <15> The skin cleansing composition according to any one of <12> to <14>, wherein component (E) is preferably one or more selected from alkyl sulfates, polyoxyalkylene alkyl ether sulfates, alkyl sulfosuccinate salts, polyoxyalkylene alkyl sulfosuccinate salts, fatty acid salts, N-acyl amino acid salts, N-acyl taurate salts and acyl isethionate salts, and more preferably one or more selected from polyoxyalkylene alkyl ether sulfates, N-acyl amino acid salts and N-acyl taurate salts. <16> The skin cleansing composition according to any one of <12> to <14>, wherein the content of component (E) is preferably 0.05% by mass or more and 15% by mass or less in the total composition, more preferably 0.05% by mass or more and 12% by mass or less, and even more preferably 0.05% by mass or more and 10% by mass or less. <17> A skin cleansing composition according to any one of <12> to <16>, wherein component (F) is preferably one or more selected from polyoxyethylene-additive nonionic surfactants, alkyl glyceryl ethers, alkyl polyglucosides, and fatty acid alkanolamides. <18> A skin cleansing composition according to any one of <12> to <16>, wherein the content of component (F) is preferably 0.01% to 15% by mass, more preferably 0.01% to 12% by mass, and even more preferably 0.05% to 10% by mass in the total composition. <19> A skin cleansing composition according to any one of <1> to <18>, further containing a polyhydric alcohol. <20> A skin cleansing composition according to any one of <1> to <19>, wherein the pH is preferably 3.5 to 10, more preferably 4.0 to 9.0, even more preferably 4.5 to 8.5, and even more preferably 4.5 to 7.5.<21> A skin cleansing composition according to any one of <1> to <20> that is filled into a foam dispensing container and dispensed as foam. <22> A skin cleansing composition according to any one of <1> to <20> that is filled into a pump foamer and dispensed as foam. <23> A skin cleansing method in which the skin cleansing composition according to any one of <1> to <22> is applied to the skin to cleanse, and then the skin surface is rinsed with water. <24> A skin cleansing method in which the skin cleansing composition according to any one of <1> to <22> is applied to the skin to cleanse, and then the skin surface is rinsed with water containing polyvalent metal ions. <25> The skin cleansing method according to <24>, wherein the polyvalent metal ions include one or more selected from calcium ions and magnesium ions. <26> The skin cleansing method according to <24> or <25>, wherein the concentration of polyvalent metal ions in the water is preferably 1 ppm by mass or more and 1000 ppm by mass or less, more preferably 5 ppm by mass or more and 500 ppm by mass or less, and even more preferably 20 ppm by mass or more and 200 ppm by mass or less. <27> Use of a skin cleansing composition according to any one of <1> to <22> for cleansing the skin. <28> Use of a skin cleansing composition according to any one of <1> to <22> for hydrophilizing the skin. <29> A hydrophilizing treatment composition containing the following components (A), (B) and (C): (A) internal olefin sulfonate or a salt thereof (B) alkyl ether carboxylic acid or a salt thereof (C) cationic polymer, wherein the mass ratio ((A + B) / C) of the total amount of components (A) and (B) to component (C) is 1 or more and less than 50.

[0031] The present invention will now be described in more detail with reference to examples, but the present invention is not limited in any way to these examples.

[0032] (Method for measuring the double bond position of the raw material olefin) The double bond position of the raw material olefin was measured by gas chromatography (hereinafter abbreviated as GC). Specifically, the raw material olefin was reacted with dimethyl disulfide to form a dithiolated derivative, and then each component was separated by GC. As a result, the double bond position of the raw material olefin was determined from the peak area of ​​each component. The equipment and analytical conditions used for the measurement are as follows: GC instrument (product name: HP6890, manufactured by HEWLETT PACKARD), column (product name: Ultra-Alloy-1HT capillary column 30m x 250μm x 0.15μm, manufactured by Frontier Lab Co., Ltd.), detector (flame ion detector (FID)), injection temperature 300℃, detector temperature 350℃, He flow rate 4.6 mL / min

[0033] Table 1 shows the physical properties of the raw material olefin, which is the starting material for internal olefin sulfonate sodium.

[0034]

[0035] Examples 1-34 and Comparative Examples 1-4: Skin cleansing compositions with the compositions shown in Tables 2-4 were prepared, and their low-temperature stability was evaluated. The obtained skin cleansing compositions were then applied to the skin, cleansed, and rinsed. The rate of foaming and rinsing performance were evaluated. These results are also shown in Tables 2-4.

[0036] (Manufacturing Method) The components shown in each table were mixed to produce liquid skin cleansing compositions with the pH shown in each table. The pH was measured by filling a beaker with 200 mL of the liquid cleansing composition (undiluted solution) and immersing the pH measuring electrode in a pH meter (LAQUA F-72S: Horiba, Ltd.) at 25°C for 1 minute. The obtained liquid cleansing composition was then filled into a pump foamer container capable of dispensing as foam. The pump foamer used was a pump foamer container manufactured by Yoshino Kogyosho Co., Ltd. (the mesh sizes of the porous membrane filters installed in the discharge path were one 90-mesh filter, one 200-mesh filter, and one 305-mesh filter).

[0037] (Low-temperature stability evaluation method) Each detergent composition for skin was placed in a screw bottle and stored in a constant temperature bath at -5°C. Then, in accordance with the following criteria, visual observation and evaluation were performed to determine whether precipitates formed over time. a: No formation of precipitates was confirmed even after 2 days b: Formation of precipitates was confirmed within 2 days after 1 day elapsed c: Formation of precipitates was confirmed within 1 day

[0038] (Sensory evaluation method) The liquid detergent composition obtained in each example was filled into a pump foamer container manufactured by Yoshino Kogyosho Co., Ltd. (the mesh sizes of the porous membrane filter provided in the discharge path are one 90-mesh sheet, one 200-mesh sheet and one 305-mesh sheet), and evaluated by 3 professional panelists according to the following criteria. Each evaluation was performed on a 5-point full scale, and the average score was calculated. (Evaluation criteria) (Sensation of increasing foam volume) Wet both arms with water, discharge foam onto the palm of one hand (liquid volume: 1 mL), and when spreading the foam onto the other forearm, evaluation was performed on whether the foam volume increases in proportion to the number of rubbing times. 5 points: It is felt that the foam volume increases considerably 4 points: It is felt that the foam volume increases 3 points: It is felt that the foam volume increases slightly 2 points: It is felt that the foam volume does not increase much 1 point: It is felt that the foam volume does not increase

[0039] (Rinse property) After washing, while rinsing off the foam with tap water, rub the other forearm with the palm of one hand to evaluate the rinse property. 5 points: Rinsing is fast, no sliminess is felt 4 points: Rinsing is relatively fast, no sliminess is felt 3 points: Rinsing is relatively slow, slight sliminess is felt 2 points: Rinsing is slow, sliminess is felt 1 point: Cannot be rinsed completely, strong sliminess is present

[0040]

[0041]

[0042]

[0043] Formulation examples of the present invention are described below. All of them exhibit the same effects as the examples.

[0044]

Claims

1. A skin cleansing composition comprising the following components (A), (B), and (C): (A) internal olefin sulfonate or a salt thereof; (B) alkyl ether carboxylic acid or a salt thereof; and (C) cationic polymer, wherein the mass ratio ((A + B) / C) of the total amount of components (A) and (B) to component (C) is 1 or more and less than 50.

2. The skin cleansing composition according to claim 1, wherein the content of component (A) is 0.5% by mass or more and 13% by mass or less of the total composition.

3. The skin cleansing composition according to claim 1 or 2, wherein the content of component (B) is 0.1% by mass or more and 8.0% by mass or less of the total composition.

4. A skin cleansing composition according to any one of claims 1 to 3, wherein the content of component (C) is 0.01% by mass or more and 1.5% by mass or less of the total composition.

5. A skin cleansing composition according to any one of claims 1 to 4, wherein component (A) is an internal olefin sulfonate having 12 to 24 carbon atoms or a salt thereof.

6. A skin cleansing composition according to any one of claims 1 to 5, wherein the content of terminal olefin sulfonates having a sulfonic acid group at the end of the carbon chain in the internal olefin sulfonate of component (A) is less than 5.0% by mass.

7. A skin cleansing composition according to any one of claims 1 to 6, wherein component (C) comprises at least one cationic polymer selected from dimethyldiallylammonium chloride polymer, dimethyldiallylammonium chloride-acrylic acid copolymer, vinylpyrrolidone-dimethylaminoethyl methacrylate copolymer, cationized cellulose, and cationized guar gum.

8. A skin cleansing composition according to any one of claims 1 to 7, wherein component (B) comprises at least one selected from polyoxyethylene lauryl ether carboxylic acid or a salt thereof, polyoxyethylene myristyl ether carboxylic acid or a salt thereof, and polyoxyethylene palmityl ether carboxylic acid or a salt thereof.

9. The skin cleansing composition according to claim 8, wherein the average number of moles of ethylene oxide added to component (B), n, is preferably 1 to 10, and more preferably 3 to 5.

10. A skin cleansing composition according to any one of claims 1 to 9, wherein the mass ratio ((A + B) / C) of the total amount of components (A) and (B) to component (C) is preferably 5 or more and 45 or less, more preferably 10 or more and 45 or less, even more preferably 15 or more and 35 or less, even more preferably 20 or more and 35 or less, even more preferably 24 or more and 32 or less, and even more preferably 27 or more and 32 or less.

11. A skin cleansing composition according to any one of claims 1 to 10, further comprising (D) one or more selected from anionic surfactants other than components (A) and (B), (E) an amphoteric surfactant, and (F) a nonionic surfactant.

12. The skin cleansing composition according to claim 11, wherein component (D) is preferably one or more selected from betaine-based surfactants and amine oxide-type surfactants, more preferably one or more selected from fatty acid amidopropyl betaine and sulfobetaine, and even more preferably fatty acid amidopropyl betaine.

13. The skin cleansing composition according to claim 12, wherein component (E) is preferably one or more selected from alkyl sulfates, polyoxyalkylene alkyl ether sulfates, alkyl sulfosuccinate salts, polyoxyalkylene alkyl sulfosuccinate salts, fatty acid salts, N-acyl amino acid salts, N-acyl taurate salts and acyl isethionate salts, and more preferably one or more selected from polyoxyalkylene alkyl ether sulfates, N-acyl amino acid salts and N-acyl taurate salts.

14. The skin cleansing composition according to claim 12, wherein component (F) is preferably one or more selected from polyoxyethylene-additive nonionic surfactants, alkyl glyceryl ethers, alkyl polyglucosides, and fatty acid alkanolamides.

15. A skin cleansing composition according to any one of claims 1 to 14, wherein the pH is 3.5 to 10.

16. A skin cleansing composition according to any one of claims 1 to 15, which is filled into a foam dispensing container and dispensed as foam.

17. A hydrophilic treatment composition comprising the following components (A), (B), and (C): (A) internal olefin sulfonic acid or a salt thereof; (B) alkyl ether carboxylic acid or a salt thereof; and (C) cationic polymer, wherein the mass ratio ((A + B) / C) of the total amount of components (A) and (B) to component (C) is 1 or more and less than 50.

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