Cleansing composition, and method for cleansing hair and / or skin

Abstract

To provide a cleaning composition that is excellent at suppressing changes in appearance due to low temperatures, and a method for cleaning hair and / or skin using the cleaning composition. [Solution] A cleansing composition comprising polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of 6 or less or more than 6, and one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof, wherein the amount of polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of 6 or less or more than 6 exceeds 1% by mass, and the pH at 25°C is 4.2 or higher and 7.5 or lower. A method for cleansing hair and / or skin using the cleansing composition.

Description

[Technical Field]

[0001] The present invention relates to a cleansing composition and a method for cleansing hair and / or skin. [Background technology]

[0002] Cleansing compositions used for washing hair, skin, etc., contain various surfactants tailored to their specific purpose in order to achieve the desired cleaning effect.

[0003] As an example of a cleansing composition, the following reference 1 discloses a hair cleansing composition characterized by containing ether carboxylic acids and their salts, alkyl glucosides, and sterol derivatives. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2015-129099 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] To achieve the desired cleaning effect, cleaning compositions may use polyoxyethylene alkyl ether carboxylic acid or its salts, as shown in Patent Document 1. However, when polyoxyethylene alkyl ether carboxylic acid or its salts are included in a relatively high concentration in a cleaning composition, storage at low temperatures (e.g., below 0°C) may result in changes in appearance due to low temperatures (changes in the appearance of the cleaning composition after low-temperature storage).

[0006] Changes in the appearance of cleaning compositions due to low temperatures are undesirable from a quality control standpoint. Furthermore, such changes in appearance can cause anxiety among consumers. Therefore, it is desirable to suppress changes in the appearance of cleaning compositions due to low temperatures.

[0007] In view of the above circumstances, the present invention aims to provide a cleaning composition that can suppress changes in appearance due to low temperatures even when polyoxyethylene alkyl ether carboxylic acid or a salt thereof is included in a relatively high concentration, and to provide a method for cleaning hair and / or skin using the cleaning composition. [Means for solving the problem]

[0008] As a result of diligent research by the inventors, it was discovered that a cleaning composition excellent in suppressing changes in appearance due to low temperatures can be realized by incorporating polyoxyethylene alkyl ether carboxylic acid or a salt thereof in an amount exceeding 1% by mass, wherein the average number of moles of ethylene oxide added is within a specific range, and further incorporating one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof, so that the pH of the cleaning composition at 25°C is between 4.2 and 7.5, and thus the present invention was completed.

[0009] The present invention includes the following inventions [1] to [7].

[0010] The cleaning composition [1] contains a polyoxyethylene alkyl ether carboxylic acid or a salt thereof having an average number of moles of ethylene oxide added of 6 or less, and one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof, wherein the amount of the polyoxyethylene alkyl ether carboxylic acid or a salt thereof having an average number of moles of ethylene oxide added of 6 or less exceeds 1% by mass, and the pH at 25°C is 4.2 or higher and 7.5 or lower.

[0011] [2] The cleaning composition contains a polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of more than 6, and one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof, wherein the amount of the polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of more than 6 is greater than 1% by mass, and the pH at 25°C is 4.2 or higher and 7.5 or lower.

[0012] The cleaning composition of [3] is the cleaning composition of [1] or [2], wherein at least alkyl sulfosuccinic acid or a salt thereof is included as one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof.

[0013] The cleaning composition [4] is one of the cleaning compositions [1] to [3] selected from the cleaning compositions [1] to [3], and is a composition comprising at least one or more selected from alkyl sulfosuccinic acid or its salt, α-olefin sulfonic acid or its salt, and acylmethylalanine or its salt, wherein at least alkyl sulfosuccinic acid or its salt and α-olefin sulfonic acid or its salt are combined, or at least alkyl sulfosuccinic acid or its salt and acylmethylalanine or its salt are combined.

[0014] The cleaning composition [5] is one of the cleaning compositions [1] to [4] selected, and contains at least one or more selected from alkyl sulfosuccinic acid or its salt, α-olefin sulfonic acid or its salt, and acylmethylalanine or its salt, with at least alkyl sulfosuccinic acid or its salt and α-olefin sulfonic acid or its salt.

[0015] The cleansing composition [6] is one of the cleansing compositions selected from [1] to [5], and is used for cleansing hair and / or skin.

[0016] The cleaning method of [7] is a cleaning method for hair and / or skin using any cleaning composition selected from the cleaning compositions of [1] to [6].

Advantages of the Invention

[0017] According to the cleaning composition of the present invention, a cleaning composition excellent in suppressing appearance change due to low temperature can be realized. Further, according to the hair and / or skin cleaning method of the present invention, a hair and / or skin cleaning method using a cleaning composition excellent in suppressing appearance change due to low temperature can be provided.

Embodiments for Carrying Out the Invention

[0018] Based on the embodiments of the present invention, the present invention will be described below.

[0019] In this specification, the term "and / or" means both or either one.

[0020] <Cleaning Composition of the First Embodiment> The cleaning composition of the first embodiment contains polyoxyethylene alkyl ether carboxylic acid or its salt having an average addition mole number of ethylene oxide of 6 or less, and one or more selected from alkyl sulfosuccinic acid or its salt, α-olefin sulfonic acid or its salt, and acylmethylalanine or its salt. The blending amount of polyoxyethylene alkyl ether carboxylic acid or its salt having an average addition mole number of ethylene oxide of 6 or less exceeds 1% by mass, and the pH at 25°C is 4.2 or more and 7.5 or less.

[0021] Due to the above configuration, the cleaning composition of the first embodiment is excellent in suppressing appearance change at least at -2°C even when polyoxyethylene alkyl ether carboxylic acid or its salt having an average addition mole number of ethylene oxide of 6 or less is relatively highly blended in an amount exceeding 1% by mass.

[0022] [Polyoxyethylene alkyl ether carboxylic acid or its salt in which the average number of moles of ethylene oxide added is 6 or less] The cleaning composition of the first embodiment is a blend of one or more polyoxyethylene alkyl ether carboxylic acids or salts thereof, wherein the average number of moles of ethylene oxide added is 6 or less.

[0023] As the polyoxyethylene alkyl ether carboxylic acid or salt thereof having an average number of moles added of ethylene oxide of 6 or less, for example, one represented by the following formula (1) can be used. R a -O-(CH2CH2O) n -CH2-COOX a (1) (R a X represents a hydrocarbon group having 12 to 24 carbon atoms. This hydrocarbon group may be linear or branched, and may be saturated or unsaturated. X represents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, or basic amino acids. n represents the average number of moles of ethylene oxide added, and is between 0.5 and 6.

[0024] As the polyoxyethylene alkyl ether carboxylic acid or salt thereof having an average number of moles of ethylene oxide added of 6 or less, for example, a polyoxyethylene alkyl ether carboxylic acid or salt thereof having an average number of moles of ethylene oxide added of 0.5 or more and 6 or less may be used, or a polyoxyethylene alkyl ether carboxylic acid or salt thereof having an average number of moles of ethylene oxide added of 2 or more and 6 or less may be used.

[0025] The cleaning composition of the first embodiment may be a polyoxyethylene alkyl ether carboxylic acid or a salt thereof, in which the average number of moles of ethylene oxide added is 6 or less, and either a polyoxyethylene alkyl ether carboxylic acid or a salt thereof, alone, or a combination of a polyoxyethylene alkyl ether carboxylic acid with an average number of moles of ethylene oxide added of 6 or less and a salt of polyoxyethylene alkyl ether carboxylic acid with an average number of moles of ethylene oxide added of 6 or less.

[0026] Examples of polyoxyethylene alkyl ether carboxylic acids or salts thereof having an average number of moles of ethylene oxide added of 6 or less include polyoxyethylene lauryl ether carboxylic acid or salts thereof having an average number of moles of ethylene oxide added of 2 or more and 6 or less (e.g., sodium polyoxyethylene lauryl ether acetate (3E.O.), sodium polyoxyethylene lauryl ether acetate (4.5EO)), polyoxyethylene tridecyl ether carboxylic acid or salts thereof having an average number of moles of ethylene oxide added of 2 or more and 6 or less, polyoxyethylene myristyl ether carboxylic acid or salts thereof having an average number of moles of ethylene oxide added of 2 or more and 6 or less, and polyoxyethylene cetyl ether carboxylic acid or salts thereof having an average number of moles of ethylene oxide added of 2 or more and 6 or less.

[0027] From the viewpoint of excellent foaming when washing hair and / or skin, the cleansing composition of the first embodiment preferably contains a polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of 6 or less, specifically a polyoxyethylene lauryl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of 5 or less (such as sodium polyoxyethylene lauryl ether acetate (3E.O.)).

[0028] Examples of polyoxyethylene alkyl ether carboxylic acids or salts thereof having an average number of added moles of ethylene oxide of 6 or less include, as ingredient names in cosmetics, laureth-3 carboxylic acid, potassium laureth-3 carboxylic acid, sodium laureth-3 carboxylic acid, TIPA laureth-3 carboxylic acid, potassium laureth-4 carboxylic acid, potassium laureth-4 carboxylic acid, sodium laureth-4 carboxylic acid, potassium laureth-4.5 acetate, laureth-5 carboxylic acid, potassium laureth-5 carboxylic acid, sodium laureth-5 carboxylic acid, laureth-6 carboxylic acid, potassium laureth-6 carboxylic acid, sodium laureth-6 carboxylic acid, trideceth-3 carboxylic acid, potassium trideceth-3 carboxylic acid, sodium trideceth-3 carboxylic acid, trideceth-4 carboxylic acid, potassium trideceth-4 carboxylic acid, sodium trideceth-4 carboxylic acid, sodium trideceth-6 carboxylic acid, myreth-3 carboxylic acid, and myreth-5 carboxylic acid.

[0029] In the cleaning composition of the first embodiment, the amount of polyoxyethylene alkyl ether carboxylic acid or its salt having an average number of moles of ethylene oxide added of 6 or less is greater than 1% by mass.

[0030] The amount of polyoxyethylene alkyl ether carboxylic acid or its salt in the cleansing composition of the first embodiment is greater than 1% by mass, but from the viewpoint of excellent foaming when washing hair and / or skin, 1.2% by mass or more is preferred, 1.5% by mass or more is more preferred, 1.8% by mass or more is even more preferred, and 2.0% by mass or more is even more preferred.

[0031] From the viewpoint of reducing the risk of skin irritation, the amount of polyoxyethylene alkyl ether carboxylic acid or its salt in the cleaning composition of the first embodiment is preferably 20% by mass or less, more preferably 18% by mass or less, and even more preferably 15% by mass or less.

[0032] From the viewpoint described above, the range of the amount of polyoxyethylene alkyl ether carboxylic acid or its salt blended in the cleaning composition of the first embodiment is preferably 1.2% by mass or more and 20% by mass or less, more preferably 1.5% by mass or more and 18% by mass or less, even more preferably 1.8% by mass or more and 15% by mass or less, and even more preferably 2.0% by mass or more and 15% by mass or less.

[0033] [One or more selected from alkyl sulfosuccinic acid or its salts, α-olefin sulfonic acid or its salts, and acylmethylalanine or its salts] The cleaning composition of the first embodiment is a mixture of one or more selected from alkyl sulfosuccinic acid or its salt, α-olefin sulfonic acid or its salt, and acylmethylalanine or its salt.

[0034] In the following description, α-olefin sulfonate or its salts, alkyl sulfosuccinic acid or its salts, and acylmethylalanine or its salts may be referred to as "alkyl sulfosuccinic acid or its salts, etc."

[0035] From the viewpoint of superior suppression of appearance changes due to low temperatures, the cleaning composition of the first embodiment preferably contains at least alkyl sulfosuccinic acid or a salt thereof. Furthermore, from the viewpoint of superior suppression of appearance changes due to low temperatures, the cleaning composition of the first embodiment more preferably contains at least a combination of alkyl sulfosuccinic acid or a salt thereof and α-olefin sulfonic acid or a salt thereof, or a combination of alkyl sulfosuccinic acid or a salt thereof and acylmethylalanine or a salt thereof, and even more preferably a combination of alkyl sulfosuccinic acid or a salt thereof and α-olefin sulfonic acid or a salt thereof.

[0036] (Alkyl sulfosuccinic acid or its salt) The cleaning composition of the first embodiment may be one in which alkyl sulfosuccinic acid or its salt, etc., is blended with one or more kinds of alkyl sulfosuccinic acid or its salt. Alkyl sulfosuccinic acid is an ester of sulfosuccinic acid and an alcohol having an alkyl group (the alcohol may have an ethylene oxide group in its structure).

[0037] As the alkyl sulfosuccinic acid or its salt, for example, those represented by the following formula (2) can be used. R b -O-(CH2CH2O) m -CO-CH(SO3X b )-CH2-COOX c (2) (R b represents a hydrocarbon group having 12 to 24 carbon atoms. The hydrocarbon group having 12 to 24 carbon atoms may be linear or branched, and may be saturated or unsaturated. X b , X c represents hydrogen, an alkali metal, an alkaline earth metal, ammonium, an alkanolamine, or a basic amino acid. Incidentally, X b , X c may be the same or different. m represents the average number of moles of ethylene oxide added, and is 0 or more and 20 or less.)

[0038] As the alkyl sulfosuccinic acid or its salt, for example, alkyl sulfosuccinate or its salt, polyoxyethylene alkyl sulfosuccinate or its salt may be used. The average number of moles of ethylene oxide added in polyoxyethylene alkyl sulfosuccinate or its salt may be, for example, 0.5 or more and 20 or less, or 2 or more and 6 or less.)

[0039] Examples of the alkyl sulfosuccinate or its salt include lauryl sulfosuccinate or its salt, cetostearyl sulfosuccinate or its salt, and diethylhexyl sulfosuccinate or its salt. Furthermore, examples of the alkyl sulfosuccinate or its salt as ingredient names in cosmetics include disodium lauryl sulfosuccinate, disodium cetearyl sulfosuccinate, disodium lauryl sulfosuccinate, and sodium diethylhexyl sulfosuccinate.

[0040] Examples of the alkyl polyoxyethylene sulfosuccinate or its salt include lauryl polyoxyethylene sulfosuccinate or its salt, decyl polyoxyethylene sulfosuccinate or its salt, (C12-14) alkyl polyoxyethylene sulfosuccinate or its salt, and (C12-15) alkyl polyoxyethylene sulfosuccinate or its salt. Furthermore, examples of the alkyl sulfosuccinate or its salt include, as ingredient names in cosmetics, disodium laureth sulfosuccinate, magnesium laureth sulfosuccinate, disodium deceth-5 sulfosuccinate, disodium deceth-6 sulfosuccinate, (C12-14) s-pareth-3-2Na sulfosuccinate, (C12-14) s-pareth-5-2Na sulfosuccinate, and (C12-14) s-pareth-7- Examples include 2Na, sulfosuccinate (C12-14)s-Pareth-9-2Na, sulfosuccinate (C12-14)s-Pareth-12-2Na, sulfosuccinate (C12-14)Pareth-1-2Na, sulfosuccinate (C12-14)Pareth-2Na, sulfosuccinate (C12-14)Pareth-2-2Na, sulfosuccinate (C12-14)Pareth-4-2Na, and sulfosuccinate (C12-15)Pareth-2Na.

[0041] The amount of alkyl sulfosuccinic acid or its salt in the cleansing composition of the first embodiment is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, from the viewpoint of excellent foaming when cleansing hair and / or skin.

[0042] From the viewpoint of reducing the risk of skin irritation, the amount of alkyl sulfosuccinic acid or its salt blended in the cleaning composition of the first embodiment is preferably 20% by mass or less, more preferably 18% by mass or less, and even more preferably 15% by mass or less.

[0043] From the viewpoint described above, the range of the amount of alkyl sulfosuccinic acid or its salt blended in the cleaning composition of the first embodiment is preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.5% by mass or more and 18% by mass or less, and even more preferably 1% by mass or more and 15% by mass or less.

[0044] (α-olefin sulfonate or its salt) The cleaning composition of the first embodiment may contain one or more α-olefin sulfonic acid or its salts as alkyl sulfosuccinic acid or its salts.

[0045] As the α-olefin sulfonic acid or its salt, for example, an alkyl sulfonic acid or its salt in which an α-olefin having 10 to 20 carbon atoms is sulfonated may be used. Examples of the salt include sodium salt, potassium salt, and triethanolamine salt.

[0046] The cleaning composition of the first embodiment may contain either α-olefin sulfonate or a salt thereof, either alone or in combination with α-olefin sulfonate and a salt thereof.

[0047] Examples of the α-olefin sulfonate or its salt include sodium tetradecenesulfonate.

[0048] Examples of the α-olefin sulfonate or its salts used as ingredient names in cosmetics include sodium olefin (C12-14) sulfonate, sodium olefin (C14-16) sulfonate, sodium olefin (C14-18) sulfonate, sodium olefin (C16-18) sulfonate, and sodium olefin C16 sulfonate.

[0049] The amount of α-olefin sulfonate or its salt in the cleaning composition of the first embodiment is not particularly limited and can be set as appropriate.

[0050] The amount of α-olefin sulfonate or its salt in the cleansing composition of the first embodiment is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, from the viewpoint of excellent foaming when cleansing hair and / or skin.

[0051] From the viewpoint of reducing the risk of skin irritation, the amount of α-olefin sulfonate or its salt in the cleansing composition of the first embodiment is preferably 20% by mass or less, more preferably 18% by mass or less, and even more preferably 15% by mass or less.

[0052] From the viewpoint described above, the range of the amount of α-olefin sulfonate or its salt blended in the cleaning composition of the first embodiment is preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.5% by mass or more and 18% by mass or less, and even more preferably 1% by mass or more and 15% by mass or less.

[0053] (Acylmethylalanine or its salts) The cleaning composition of the first embodiment may contain one or more acylmethylalanine or salts thereof as alkyl sulfosuccinic acid or a salt thereof.

[0054] As the acylmethylalanine or salt thereof, for example, one represented by the following formula (3) can be used. R d -CO-N(CH3)-CH2CH2-COOX d (3) (R d This represents a hydrocarbon group having 7 to 24 carbon atoms. The hydrocarbon group having 7 to 24 carbon atoms may be linear or branched, and may be saturated or unsaturated. d (This represents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, or amino acids.)

[0055] The cleaning composition of the first embodiment may contain either acylmethylalanine or a salt thereof alone, or it may contain a combination of acylmethylalanine and a salt thereof.

[0056] Examples of the aforementioned acylmethylalanine or its salts include lauroylmethylalanine or its salts (such as sodium lauroylmethyl-β-alanine), cocoylmethylalanine or its salts, and myristoylmethylalanine or its salts.

[0057] Examples of the aforementioned acylmethylalanine or its salts, as listed in cosmetic ingredient labels, include lauroyl methylalanine, lauroyl methylalanine K, lauroyl methylalanine Na, lauroyl methylalanine TEA, cocoyl methylalanine, cocoyl methylalanine Na, myristoyl methylalanine, and myristoyl methylalanine Na.

[0058] The amount of acylmethylalanine or its salt in the cleansing composition of the first embodiment is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, from the viewpoint of excellent foaming when cleansing hair and / or skin.

[0059] From the viewpoint of reducing the risk of skin irritation, the amount of acylmethylalanine or its salt in the cleansing composition of the first embodiment is preferably 20% by mass or less, more preferably 18% by mass or less, and even more preferably 15% by mass or less.

[0060] From the viewpoint described above, the range of the amount of acylmethylalanine or its salt blended in the cleaning composition of the first embodiment is preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.5% by mass or more and 18% by mass or less, and even more preferably 1% by mass or more and 15% by mass or less.

[0061] (The mass ratio of the amount of alkyl sulfosuccinic acid or its salt, etc., to the amount of polyoxyethylene alkyl ether carboxylic acid or its salt, in which the average number of moles of ethylene oxide added is 6 or less) In the cleaning composition of the first embodiment, the mass ratio of the amount of alkyl sulfosuccinic acid or its salt, etc. to the amount of polyoxyethylene alkyl ether carboxylic acid or its salt, etc., having an average number of moles of ethylene oxide added of 6 or less, can be appropriately set ([(amount of alkyl sulfosuccinic acid or its salt, etc.) / (amount of polyoxyethylene alkyl ether carboxylic acid or its salt, having an average number of moles of ethylene oxide added of 6 or less)]), for example, 0.2 to 30. In the cleaning composition of the first embodiment, from the viewpoint of being superior in suppressing changes in appearance due to low temperature, the above mass ratio is preferably 0.3 or higher, more preferably 0.5 or higher, even more preferably 0.8 or higher, even more preferably 1.0 or higher, and particularly preferably 1.2 or higher.

[0062] [Optional ingredients] The cleaning composition of the first embodiment may contain components other than polyoxyethylene alkyl ether carboxylic acid or its salts, alkyl sulfosuccinic acid or its salts, etc., in which the average number of moles of ethylene oxide added is 6 or less (hereinafter referred to as "optional components"). The optional components can be known components used in cleaning compositions, and examples include water, pH adjusters, anionic surfactants (excluding polyoxyethylene alkyl ether carboxylic acid or its salts, alkyl sulfosuccinic acid or its salts, etc., in which the average number of moles of ethylene oxide added is 6 or less), cationic surfactants, amphoteric surfactants, nonionic surfactants, monohydric alcohols, polyhydric alcohols, sugars, ester oils, oils and fats, fatty acids, hydrocarbons, waxes, silicones, polymer compounds, amino acids, animal and plant extracts, microbial-derived products, inorganic compounds, fragrances, preservatives, metal ion sequestering agents, and ultraviolet absorbers.

[0063] (water) The cleaning composition of the first embodiment is preferably one that contains water, from the viewpoint of facilitating the incorporation of polyoxyethylene alkyl ether carboxylic acid or its salt, alkyl sulfosuccinic acid or its salt, etc., having an average number of moles of ethylene oxide added of 6 or less. The amount of water is not particularly limited and may be set as appropriate.

[0064] If the cleaning composition of the first embodiment contains water, the amount of water is, for example, 60% by mass or more. Alternatively, if the cleaning composition of the first embodiment contains water, the amount of water is, for example, 90% by mass or less. Therefore, the range of the amount of water in the cleaning composition of the first embodiment may be, for example, 60% by mass or more and 90% by mass or less.

[0065] (pH adjuster) The cleaning composition of the first embodiment may contain one or more pH adjusting agents to adjust the pH at 25°C to a range of 4.2 to 7.5. Acids and / or alkalis can be used as pH adjusting agents, and one or more acids or alkalis may be included, or one or more acids and alkalis may be included. For example, the amount of pH adjusting agent in the cleaning composition of the first embodiment is 0.01% by mass or more and 10% by mass or less.

[0066] Examples of the aforementioned acids include organic acids and inorganic acids. Examples of organic acids include glycolic acid, lactic acid, glyceric acid, gluconic acid, malic acid, tartaric acid, citric acid, succinic acid, glutamic acid, and aspartic acid. Examples of inorganic acids include hydrochloric acid, sulfuric acid, nitric acid, and phosphoric acid.

[0067] Examples of the alkali include organic alkalis and inorganic alkalis. Examples of organic alkalis include amino alcohols (monoethanolamine, triethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, etc.), morpholine, and basic amino acids (arginine, etc.). Examples of inorganic alkalis include caustic alkalis (potassium hydroxide, sodium hydroxide), ammonia, etc.

[0068] (Amphoteric surfactant) The cleaning composition of the first embodiment may contain one or more amphoteric surfactants.

[0069] Examples of the above-mentioned amphoteric surfactants include fatty acid amidopropyl betaine, alkyldimethylaminoacetic acid betaine, imidazolinium betaine (such as N-coconut oil fatty acid acyl-N'-carboxyethyl-N'-hydroxyethylethylenediamine sodium, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, undecyl-N-hydroxyethyl-N-carboxymethylimidazolinium betaine, etc.), sulfobetaine (such as N-alkyl-N,N-dimethylammonium-N-propylsulfonate sodium, N-alkyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate sodium, N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate sodium, etc.), and amine oxide (such as lauric acid amidopropyl dimethylamine oxide).

[0070] Examples of the aforementioned amphoteric surfactants, as listed in cosmetic ingredient labels, include lauramidopropyl betaine, cocamidopropyl betaine, myristamidopropyl betaine, isostearamidopropyl betaine, lauryl betaine, cocobetaine, myristyl betaine, oleyl betaine, behenyl betaine, sodium lauroamphoacetate, disodium lauroamphodiacetate, sodium cocoamphoacetate, disodium cocoamphodiacetate, sodium cocoamphopropionate, disodium cocoamphodipropionate, and lauryl hydroxysultaine. Examples include lauramidopropyl hydroxysultaine, cocamidopropyl hydroxysultaine, decylamine oxide, lauramine oxide, myristamine oxide, cocamine oxide, stearamine oxide, oleamine oxide, behenamine oxide, lauramidopropylamine oxide, myristamidopropylamine oxide, cocamidopropylamine oxide, decyltetradecylamine oxide, dihydroxyethyl lauramine oxide, and dihydroxyethyl cocamine oxide.

[0071] When an amphoteric surfactant is incorporated into the cleaning composition of the first embodiment, the amount of the amphoteric surfactant is not particularly limited and may be set as appropriate, but for example, it is 0.1% by mass or more and 15% by mass or less.

[0072] (Cationic polymers and / or amphoteric polymers) The cleaning composition of the first embodiment may be a blend of one or more cationic polymers and / or amphoteric polymers. Cationic polymers and amphoteric polymers are polymers having cationic substituents, and these substituents include amino groups, ammonium groups, and the like.

[0073] Examples of the cationic and / or amphoteric polymers mentioned above include cationized cellulose (hydroxyethylcellulose dimethyldiallylammonium chloride, O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride, etc.), cationized guar gum, cationized cassia, cationized xanthan gum, cationized tara gum, cationized tamarind gum, cationized starch, cationized fenugreek gum, cationized locust bean gum, dimethyldiallylammonium chloride / acrylamide copolymer, acrylamide / acrylic acid / dimethyldiallylammonium chloride copolymer, N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / dimethacrylate Examples include polyethylene glycol methacrylate copolymer, adipic acid-dimethylaminohydroxypropylethylenetriamine copolymer, alkylacrylamide-acrylate-alkylaminoalkylacrylamide-polyethylene glycol methacrylate copolymer, vinylimidazolium trichloride-vinylpyrrolidone copolymer, vinylpyrrolidone-N,N-dimethylaminoethyl methacrylate copolymer diethyl sulfate, vinylpyrrolidone-alkylaminoacrylate-vinylcaprolactam copolymer, vinylpyrrolidone-alkylaminoacrylate copolymer, vinylpyrrolidone-methacrylamidopropyltrimethylammonium chloride copolymer, and vinylpyrrolidone-quaternized dimethylaminoethyl methacrylate copolymer.

[0074] As the cationic polymer and / or amphoteric polymer, for example, as ingredient names in cosmetics, they are polyquaternium-1, polyquaternium-2, polyquaternium-4, polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-11, polyquaternium-16, polyquaternium-22, polyquaternium-24, polyquaternium-28, polyquaternium-30, polyquaternium-32, poly Quaternium-33, Polyquaternium-37, Polyquaternium-39, Polyquaternium-44, Polyquaternium-46, Polyquaternium-47, Polyquaternium-52, Polyquaternium-53, Polyquaternium-55, Polyquaternium-59, Polyquaternium-64, Polyquaternium-65, Polyquaternium-67, Polyquaternium-68, Polyquaternium-69, Polyquaternium-71, Polyquaternium Examples include um-88, polyquaternium-107, polyquaternium-113, PG-hydroxyethylcellulose stearyldimonium chloride, PG-hydroxyethylcellulose cocodimonium chloride, hydroxypropylcellulose hydroxypropyltrimonium chloride, guar hydroxypropyltrimonium chloride, hydroxypropylguar hydroxypropyltrimonium chloride, cassia hydroxypropyltrimonium chloride, xanthan hydroxypropyltrimonium chloride, caesalpinia spinosa hydroxypropyltrimonium chloride, tamarind hydroxypropyltrimonium chloride, cationized starch-2, hydroxypropyltrimonium chloride starch, locust bean hydroxypropyltrimonium chloride, and (adipic acid / dimethylamino hydroxypropyldiethylenetriamine) copolymer.

[0075] In the cleaning composition of the first embodiment, when a cationic polymer and / or an amphoteric polymer are blended, the amount of the cationic polymer and / or amphoteric polymer is not particularly limited and may be set as appropriate, but for example, it is 0.1% by mass or more and 2% by mass or less. The "amount of cationic polymer and / or amphoteric polymer" refers to the amount of either a cationic polymer or an amphoteric polymer blended in the cleaning composition of the first embodiment, and means the total amount of the cationic polymer and amphoteric polymer blended when both a cationic polymer and an amphoteric polymer are blended.

[0076] [Iss] The pH of the cleaning composition of the first embodiment at 25°C is 4.2 to 7.5, from the viewpoint of excellent suppression of appearance changes due to low temperatures. The above pH value is obtained by measuring the cleaning composition of the first embodiment at 25°C using a known pH meter. If the above measurement is difficult depending on the dosage form and amount of water used in the cleaning composition of the first embodiment, the cleaning composition of the first embodiment may be appropriately diluted with purified water (for example, 20-fold dilution), and the diluted product at 25°C may be measured using a known pH meter.

[0077] The pH of the cleaning composition of the first embodiment at 25°C is preferably 4.4 or higher, more preferably 4.6 or higher, even more preferably 5.1 or higher, even more preferably 5.4 or higher, and particularly preferably 6.0 or higher, from the viewpoint of being superior in suppressing changes in appearance due to low temperatures.

[0078] The pH of the cleaning composition of the first embodiment at 25°C may be 7.3 or less, 7.1 or less, or 7.0 or less.

[0079] The pH range of the cleaning composition of the first embodiment at 25°C is preferably 4.4 to 7.5, 4.4 to 7.3, 4.4 to 7.1, or 4.4 to 7.0, more preferably 4.6 to 7.5, 4.6 to 7.3, 4.6 to 7.1, or 4.6 to 7.0, even more preferably 5.1 to 7.5, 5.1 to 7.3, 5.1 to 7.1, or 5.1 to 7.0, even more preferably 5.4 to 7.5, 5.4 to 7.3, 5.4 to 7.1, or 5.4 to 7.0, and particularly preferably 6.0 to 7.5, 6.0 to 7.3, 6.0 to 7.1, or 6.0 to 7.0.

[0080] 〔viscosity〕 The viscosity of the cleaning composition of the first embodiment is not particularly limited and may be set as appropriate. For example, the viscosity of the cleaning composition of the first embodiment is 50,000 mPa·s or less. Here, the viscosity of the cleaning composition of the first embodiment is adopted as the value obtained after 60 seconds at 25°C using a B-type viscometer with a rotor selected according to the viscosity. The rotor rotation speed during measurement may be, for example, 6 rpm, 12 rpm, or 30 rpm.

[0081] [Dosage Form] The dosage form used in the cleaning composition of the first embodiment is not particularly limited and may be, for example, liquid, cream, gel, solid, paste, or foam.

[0082] 〔exterior〕 The appearance of the cleaning composition of the first embodiment is not particularly limited, but can be transparent, opaque, or pearlescent, for example. Transparent means, for example, a state in which the appearance can be seen through a colorless, transparent glass bottle when the cleaning composition of the first embodiment is left standing in the glass bottle at 25°C.

[0083] [Manufacturing method] The method for producing the cleaning composition of the first embodiment can be any known method for producing a cleaning composition, depending on the dosage form used. For example, one method involves mixing a predetermined amount of polyoxyethylene alkyl ether carboxylic acid or a salt thereof with alkyl sulfosuccinic acid or a salt thereof, and adjusting the pH at 25°C to 4.2 or higher and 7.5 or lower. In this method, a solvent (such as water) may be used as needed.

[0084] [How to use] The cleaning composition of the first embodiment may be used in accordance with known methods for using cleaning compositions. For example, the hair and / or skin may be wet with water, and the cleansing composition of the first embodiment may be used to cleanse the hair and / or skin, followed by rinsing with water and then drying the hair and / or skin.

[0085] (Application) The cleansing composition of the first embodiment is used for cleansing hair and / or skin. Therefore, the cleansing composition of the first embodiment may be a hair cleansing composition and / or a skin cleansing composition. The cleansing composition of the first embodiment may be a hair cleansing composition, a hair and scalp cleansing composition, or a scalp cleansing composition used for cleansing hair and / or scalp.

[0086] The areas to which the cleansing composition of the first embodiment can be applied are not particularly limited, but examples include hair, scalp, torso, arms, hands, feet, fingers, neck, and face. The cleansing composition of the first embodiment may be used for cleansing hair and / or scalp, or it may be used for cleansing skin other than the scalp. For example, when used for cleansing skin other than the scalp, it may be used for cleansing skin other than the face, or it may be used for cleansing facial skin.

[0087] (Product form) The product form of the cleansing composition of the first embodiment is not particularly limited, but examples include hair shampoo, scalp shampoo, hair and scalp shampoo, body shampoo, hand soap, facial cleanser, makeup remover, and makeup remover.

[0088] <Cleaning composition of the second embodiment> The cleaning composition of the second embodiment contains a polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of more than 6, and one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof, wherein the amount of the polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of moles of ethylene oxide added of more than 6 is greater than 1% by mass, and the pH at 25°C is 4.2 or higher and 7.5 or lower.

[0089] The cleaning composition of the second embodiment, with the above configuration, is excellent at suppressing changes in appearance at least at -10°C, even when polyoxyethylene alkyl ether carboxylic acid or its salt, with an average number of added moles of ethylene oxide exceeding 6, is blended in a relatively high amount of more than 1% by mass.

[0090] [Polyoxyethylene alkyl ether carboxylic acids or salts thereof with an average number of moles of ethylene oxide added exceeding 6] The cleaning composition of the second embodiment contains one or more polyoxyethylene alkyl ether carboxylic acids or salts thereof with an average number of added moles of ethylene oxide exceeding 6.

[0091] As a polyoxyethylene alkyl ether carboxylic acid or salt thereof with an average number of added moles of ethylene oxide exceeding 6, for example, one represented by the following formula (4) can be used. R e -O-(CH2CH2O) l -CH2-COOX e (4) (R aX represents a hydrocarbon group having 12 to 24 carbon atoms. This hydrocarbon group may be linear or branched, and may be saturated or unsaturated. X represents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, or basic amino acids. l represents the average number of moles of ethylene oxide added, greater than 6 and less than or equal to 20.

[0092] As the polyoxyethylene alkyl ether carboxylic acid or salt thereof with an average number of moles of ethylene oxide added of more than 6, for example, a polyoxyethylene alkyl ether carboxylic acid or salt thereof with an average number of moles of ethylene oxide added of more than 6 and 20 or less may be used, or a polyoxyethylene alkyl ether carboxylic acid or salt thereof with an average number of moles of ethylene oxide added of more than 6 and 12 or less may be used.

[0093] The cleaning composition of the second embodiment may be a polyoxyethylene alkyl ether carboxylic acid or a salt thereof, in which the average number of moles of ethylene oxide added is 6 or more, formulated alone as the polyoxyethylene alkyl ether carboxylic acid or a salt thereof, in which the average number of moles of ethylene oxide added is 6 or more, or it may be a combination of a polyoxyethylene alkyl ether carboxylic acid and a salt of polyoxyethylene alkyl ether carboxylic acid, in which the average number of moles of ethylene oxide added is 6 or more.

[0094] Examples of polyoxyethylene alkyl ether carboxylic acids or salts thereof with an average number of moles of ethylene oxide added exceeding 6 include polyoxyethylene lauryl ether carboxylic acid or salts thereof with an average number of moles of ethylene oxide added exceeding 6 and 20 or less (such as sodium polyoxyethylene lauryl ether acetate (10 E.O.)), polyoxyethylene tridecyl ether carboxylic acid or salts thereof with an average number of moles of ethylene oxide added exceeding 6 and 20 or less, polyoxyethylene myristyl ether carboxylic acid or salts thereof with an average number of moles of ethylene oxide added exceeding 6 and 20 or less, and polyoxyethylene cetyl ether carboxylic acid or salts thereof with an average number of moles of ethylene oxide added exceeding 6 and 20 or less.

[0095] The cleansing composition of the second embodiment is preferably formulated with a polyoxyethylene alkyl ether carboxylic acid or a salt thereof that has an average number of added moles of ethylene oxide of 6 or more (such as sodium polyoxyethylene lauryl ether acetate (10 E.O.)) as the polyoxyethylene alkyl ether carboxylic acid or a salt thereof.

[0096] Examples of polyoxyethylene alkyl ether carboxylic acids or salts thereof, as listed in cosmetic ingredient labels, include laureth-8 carboxylic acid, sodium laureth-8 carboxylic acid, laureth-10 carboxylic acid, potassium laureth-10 carboxylic acid, laureth-11 carboxylic acid, sodium laureth-11 carboxylic acid, laureth-12 carboxylic acid, sodium laureth-12 carboxylic acid, laureth-13 carboxylic acid, sodium laureth-13 carboxylic acid, laureth-14 carboxylic acid, sodium laureth-14 carboxylic acid, sodium laureth-16 carboxylic acid, laureth-17 carboxylic acid, sodium laureth-17 carboxylic acid, trideceth-8 carboxylic acid, sodium trideceth-8 carboxylic acid, sodium trideceth-12 carboxylic acid, trideceth-15 carboxylic acid, potassium trideceth-15 carboxylic acid, sodium trideceth-15 carboxylic acid, trideceth-19 carboxylic acid, potassium trideceth-19 carboxylic acid, sodium trideceth-19 carboxylic acid, and sodium ceteth-13 carboxylic acid.

[0097] In the cleaning composition of the second embodiment, the amount of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of added moles of ethylene oxide exceeding 6 is greater than 1% by mass.

[0098] In the second embodiment of the cleansing composition, the amount of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of added moles of ethylene oxide exceeding 6 is greater than 1% by mass, but from the viewpoint of excellent foaming when washing hair and / or skin, 1.2% by mass or more is preferred, 1.5% by mass or more is more preferred, and 1.8% by mass or more is even more preferred.

[0099] In the second embodiment of the cleaning composition, the amount of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of added moles of ethylene oxide exceeding 6 is preferably 20% by mass or less, more preferably 18% by mass or less, and even more preferably 15% by mass or less, from the viewpoint of reducing the risk of skin irritation.

[0100] From the viewpoint described above, the range of the amount of polyoxyethylene alkyl ether carboxylic acid or its salt in the cleaning composition of the second embodiment, in which the average number of added moles of ethylene oxide is 6 or more, is preferably 1.2% by mass or more and 20% by mass or less, more preferably 1.5% by mass or more and 18% by mass or less, and even more preferably 1.8% by mass or more and 15% by mass or less.

[0101] 〔others〕 The cleaning composition of the second embodiment is identical to the description of the cleaning composition of the first embodiment in terms of [one or more selected from alkyl sulfosuccinic acid or its salt, α-olefin sulfonic acid or its salt, and acylmethylalanine or its salt], [optional components], [pH], [viscosity], [dosage form], [appearance], [manufacturing method], [method of use], etc., except that it is essentially formulated with polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of moles of ethylene oxide added of 6 or less.

[0102] <Cleaning method according to the third embodiment> The hair and / or skin cleansing method of this embodiment is a method of cleansing hair and / or skin using the cleansing composition of the first embodiment described above.

[0103] In this embodiment, the method for washing hair and / or skin can be any known method of washing hair and / or skin other than using the washing composition of the first embodiment. Therefore, the method of using the washing composition of the first embodiment described above may also be used.

[0104] <Cleaning method according to the fourth embodiment> The hair and / or skin cleansing method of this embodiment is a method of cleansing hair and / or skin using the cleansing composition of the second embodiment described above.

[0105] In this embodiment, the method for washing hair and / or skin can be any known method of washing hair and / or skin, other than using the washing composition of the second embodiment. Therefore, the method of using the washing composition of the second embodiment described above may also be used. [Examples]

[0106] The present invention will be described in detail below based on examples, but the present invention should not be interpreted as being limited based on the description of these examples.

[0107] (Preparation of cleaning compositions for Examples A1-A13, Example B1, Comparative Examples A1-A5, Comparative Example B1, and Reference Example A1) Using the ingredients listed below, the cleaning compositions for Examples A1-A13, Example B1, Comparative Examples A1-A5, Comparative Example B1, and Reference Example A1 were prepared by mixing the ingredients according to conventional methods to obtain the compositions shown in Tables 1-7. The values ​​in the ingredient column of Tables 1-7 are in mass percent. In the ingredient column of Tables 1-7, "appropriate amount" of pH adjuster refers to the amount that results in the pH of the cleaning composition of each example or comparative example at 25°C being the value shown in Tables 1-6, and "amount of purified water to make a total of 100%" refers to the amount of purified water that makes the total volume of the cleaning composition of each example or comparative example 100% by mass.

[0108] (Ingredients used) Sodium polyoxyethylene lauryl ether acetate (3 E.O.), sodium polyoxyethylene lauryl ether acetate (4.5 E.O.), sodium polyoxyethylene lauryl ether acetate (10 E.O.), sodium tetradecenesulfonate, disodium lauryl polyoxyethylene sulfosuccinate, sodium lauroyl methyl-β-alanine, sodium N-coconut oil fatty acid acyl-L-glutamate, coconut oil fatty acid amidopropyl betaine, coconut oil fatty acid N-methylethanolamide, O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride, pH adjuster (citric acid or potassium hydroxide), purified water.

[0109] The number before "EO" in the ingredient sodium polyoxyethylene lauryl ether acetate represents the average number of moles of ethylene oxide added.

[0110] (evaluation) The cleaning compositions of Examples A1-A13, Example B1, Comparative Examples A1-A5, Comparative Example B1, and Reference Example A1, prepared as described above, were evaluated for changes in appearance due to low-temperature storage as follows. In addition, the pH value of each cleaning composition prepared as described above at 25°C was measured using a commercially available pH meter. Before low-temperature storage, the cleaning compositions of Examples A1-A13, Example B1, Comparative Examples A1-A5, Comparative Example B1, and Reference Example A1 were all transparent at 25°C, and no turbidity was observed.

[0111] Multiple samples were prepared by placing 80g of each cleaning composition from each example, comparative example, or Reference Example 1 into colorless, transparent glass sealed containers (capacity 100mL). Next, each sealed container containing the cleaning composition was placed in a constant temperature bath adjusted to -2°C, -5°C, and -10°C, respectively, and stored for a predetermined period (10 days at -2°C, 5 days at -5°C, and 15 hours at -10°C). After the predetermined period had elapsed, each sealed container was removed from the constant temperature bath, and the appearance of the contents of each sealed container immediately after removal was visually observed by an evaluator who routinely evaluates cleaning compositions, according to the evaluation criteria described below.

[0112] (Evaluation Criteria) ◎: Not frozen, no cloudiness observed (no change in appearance from before low-temperature storage). ○: Not frozen, but slight cloudiness is observed. ×: Not frozen, but clearly cloudy. ××: It's frozen.

[0113] (Evaluation results) Tables 1 to 6 show the evaluation results for the suppression of appearance changes at low temperatures in the cleaning compositions of Examples A1 to A13, Comparative Examples A1 to A5, and Reference Example A1, using polyoxyethylene alkyl ether carboxylic acid or its salts, in which the average number of added moles of ethylene oxide is 6 or less.

[0114] Table 7 also shows the evaluation results for the suppression of appearance changes at low temperatures in the cleaning composition of Example B1 and the cleaning composition of Comparative Example B1, using polyoxyethylene alkyl ether carboxylic acid or a salt thereof with an average number of added moles of ethylene oxide exceeding 6.

[0115] (Evaluation results: Reference example A1, Comparative examples A1-A2) Table 1 shows the evaluation results for suppressing appearance changes due to low temperatures in the cleaning composition of Reference Example A1 and the cleaning compositions of Comparative Examples A1 and A2.

[0116] [Table 1]

[0117] As shown in Table 1, the cleaning compositions of Comparative Examples A1 and A2, which contained polyoxyethylene alkyl ether carboxylic acid or its salt in an amount exceeding 1% by mass (2.0% by mass, 2.9% by mass), were inferior in suppressing appearance changes at -2°C compared to the cleaning composition of Reference Example A1, which contained 1% by mass of polyoxyethylene alkyl ether carboxylic acid or its salt. Therefore, it can be seen that increasing the amount of polyoxyethylene alkyl ether carboxylic acid or its salt in a cleaning composition tends to lead to better suppression of appearance changes at low temperatures.

[0118] (Evaluation results: Examples A1-A3, Comparative Examples A1, A3) Table 2 shows the evaluation results for the suppression of appearance changes due to low temperatures in the cleaning compositions of Examples A1 to A3 and Comparative Examples A1 and A3.

[0119] [Table 2]

[0120] As shown in Table 2, the cleaning compositions of Examples A1 to A3, which contain α-olefin sulfonic acid or its salt (such as alkyl sulfosuccinic acid or its salt), alkyl sulfosuccinic acid or its salt, or acylmethylalanine or its salt, showed excellent suppression of appearance changes at -2°C and -5°C, even though they contain 2% by mass of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of moles of ethylene oxide added of 6 or less. On the other hand, the cleaning compositions of Comparative Examples A1 and A3, which do not contain alkyl sulfosuccinic acid or its salt, but contain 2% by mass of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of moles of ethylene oxide added of 6 or less, showed inferior suppression of appearance changes at -2°C and -5°C compared to the cleaning compositions of Examples A1 to A3. Therefore, even if a relatively large amount of polyoxyethylene alkyl ether carboxylic acid or its salt, in which the average number of moles of ethylene oxide added is 6 or less, is included in the cleaning composition, it can be seen that the inclusion of alkyl sulfosuccinic acid or its salt provides excellent suppression of appearance changes at least at -2°C.

[0121] Furthermore, as shown in Table 2, the cleaning composition of Example A1, which contained alkyl sulfosuccinic acid or its salt as alkyl sulfosuccinic acid or its salt, was superior in suppressing appearance changes at -10°C compared to the cleaning compositions of Examples A2 to A3, which contained either α-olefin sulfonic acid or its salt, or acylmethylalanine or its salt as alkyl sulfosuccinic acid or its salt. Therefore, even if a cleaning composition contains a relatively large amount of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of added moles of ethylene oxide of 6 or less, it can be seen that if alkyl sulfosuccinic acid or its salt is included as alkyl sulfosuccinic acid or its salt, it will be superior in suppressing appearance changes at -10°C.

[0122] (Evaluation results: Examples A4-A6) Table 3 shows the evaluation results for the suppression of appearance changes due to low temperatures in the cleaning compositions of Examples A4 to A6.

[0123] [Table 3]

[0124] As shown in Table 3, the cleaning compositions of Examples A4 to A6, which contain alkyl sulfosuccinic acid or its salts, were excellent at suppressing changes in appearance at -2°C, even though they contained 2% by mass of polyoxyethylene alkyl ether carboxylic acid or its salts, in which the average number of moles of ethylene oxide added is 6 or less.

[0125] Furthermore, as shown in Table 3, the cleaning compositions of Examples A4 to A5, which contained either a combination of "alkyl sulfosuccinic acid or its salt" and "α-olefin sulfonic acid or its salt" or a combination of "alkyl sulfosuccinic acid or its salt" and "acylmethylalanine or its salt" as alkyl sulfosuccinic acid or its salt, showed superior suppression of appearance changes at -5°C compared to the cleaning composition of Example A6, which contained a combination of "α-olefin sulfonic acid or its salt" and "acylmethylalanine or its salt" as alkyl sulfosuccinic acid or its salt. Moreover, the cleaning composition of Example A4, which contained a combination of "alkyl sulfosuccinic acid or its salt" and "α-olefin sulfonic acid or its salt" as alkyl sulfosuccinic acid or its salt, showed superior suppression of appearance changes at -10°C compared to the cleaning composition of Example A5, which contained a combination of "alkyl sulfosuccinic acid or its salt" and "acylmethylalanine or its salt". Therefore, even if a relatively large amount of polyoxyethylene alkyl ether carboxylic acid or its salt, in which the average number of added moles of ethylene oxide is 6 or less, is included in the cleaning composition, if a combination of "alkyl sulfosuccinic acid or its salt" and "α-olefin sulfonic acid or its salt," or a combination of "alkyl sulfosuccinic acid or its salt" and "acylmethylalanine or its salt" is included as alkyl sulfosuccinic acid or its salt, then it is superior in suppressing changes in appearance at low temperatures, and if a combination of "alkyl sulfosuccinic acid or its salt" and "α-olefin sulfonic acid or its salt" is included, then it is even superior in suppressing changes in appearance at low temperatures.

[0126] Furthermore, the evaluation results for the suppression of appearance change at -10°C for the cleaning composition of Example A2 shown in Table 2 and the cleaning composition of Example A4 shown in Table 3 were both rated as ○. However, the cleaning composition of Example A4 (containing a combination of "α-olefin sulfonate or its salt" and "alkyl sulfosuccinic acid or its salt" as alkyl sulfosuccinic acid or its salt) showed less turbidity and a more transparent appearance compared to the cleaning composition of Example A2 (containing "alkyl sulfosuccinic acid or its salt" as alkyl sulfosuccinic acid or its salt). Therefore, it can be seen that even if a relatively large amount of polyoxyethylene alkyl ether carboxylic acid or its salt, in which the average number of added moles of ethylene oxide is 6 or less, is included in the cleaning composition, if a combination of "α-olefin sulfonate or its salt" and "alkyl sulfosuccinic acid or its salt" is included as alkyl sulfosuccinic acid or its salt, it is even more effective in suppressing appearance change at low temperatures.

[0127] (Evaluation results: Examples A7-A8) Table 4 shows the evaluation results for the suppression of appearance changes due to low temperatures in the cleaning compositions of Examples A7 and A8.

[0128] [Table 4]

[0129] As shown in Table 4, the cleaning compositions of Examples A7 to A8, which contain alkyl sulfosuccinic acid or its salts, were excellent at suppressing changes in appearance at -2°C, even though they contained 3% by mass of polyoxyethylene alkyl ether carboxylic acid or its salts, with an average number of moles of ethylene oxide added of 6 or less.

[0130] Furthermore, as shown in Table 4, the cleaning composition of Example A8 (containing a combination of "α-olefin sulfonate or its salt" and "alkyl sulfosuccinic acid or its salt" as alkyl sulfosuccinic acid or its salt) was superior in suppressing appearance changes at -10°C compared to the cleaning composition of Example A7 (containing "α-olefin sulfonate or its salt" as alkyl sulfosuccinic acid or its salt). Therefore, even if a relatively large amount of polyoxyethylene alkyl ether carboxylic acid or its salt, in which the average number of added moles of ethylene oxide is 6 or less, is included in the cleaning composition, it can be seen that if a combination of "α-olefin sulfonate or its salt" and "alkyl sulfosuccinic acid or its salt" is included as alkyl sulfosuccinic acid or its salt, it will be even superior in suppressing appearance changes at low temperatures.

[0131] (Evaluation results: Examples A4, A9-A12, Comparative Example A4) Table 5 shows the evaluation results for the suppression of appearance changes due to low temperatures in the cleaning compositions of Examples A4, A9-A12, and Comparative Example A4.

[0132] [Table 5]

[0133] As shown in Table 5, the cleaning compositions of Examples A4 and A9-A12, which had a pH of 4.3 to 7.0 at 25°C, were superior in suppressing appearance changes at -2°C compared to the cleaning composition of Comparative Example A4, which had a pH of 4.0 at 25°C. Therefore, it can be seen that even if a cleaning composition contains a relatively large amount of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of added moles of ethylene oxide of 6 or less, if alkyl sulfosuccinic acid or its salt is included and the pH at 25°C is within a predetermined range, it is possible to achieve superior suppression of appearance changes at -2°C.

[0134] Furthermore, as shown in Table 5, the cleaning compositions of Examples A4 and A10-A12, which had a pH of 4.5 to 7.0 at 25°C, were superior in suppressing appearance changes at -5°C compared to the cleaning composition of Example A9, which had a pH of 4.3 at 25°C. The cleaning compositions of Examples A4 and A12, which had a pH of 5.5 to 7.0 at 25°C, were even more superior in suppressing appearance changes at -5°C compared to the cleaning compositions of Examples A10 and A11, which had a pH of 5.0 or less at 25°C. Moreover, the cleaning composition of Example A12, which had a pH of 7.0 at 25°C, was even more superior in suppressing appearance changes at -10°C compared to the cleaning composition of Example A4, which had a pH of 5.5 at 25°C. Therefore, it can be seen that even if a relatively large amount of polyoxyethylene alkyl ether carboxylic acid or its salt, in which the average number of moles of ethylene oxide added is 6 or less, is included in the cleaning composition, and as the pH at 25°C is within a predetermined range and approaches 7.0, the suppression of appearance changes due to low temperatures tends to be more effective.

[0135] (Evaluation results: Example A14, Comparative Example A5) Table 5 shows the evaluation results for the suppression of appearance changes due to low temperatures in the cleaning compositions of Example A14 and Comparative Example A5.

[0136] [Table 6]

[0137] As shown in Table 6, the cleaning composition of Example A14, which contains alkyl sulfosuccinic acid or its salt, was excellent at suppressing appearance changes at -2°C, even though it contained 2% by mass of polyoxyethylene alkyl ether carboxylic acid or its salt (polyoxyethylene lauryl ether acetate sodium (3E.O.)) with an average number of moles of ethylene oxide added of 6 or less. On the other hand, the cleaning composition of Comparative Example A5, which did not contain alkyl sulfosuccinic acid or its salt, but contained 2% by mass of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of moles of ethylene oxide added of 6 or less, was inferior to the cleaning composition of Example A14 in suppressing appearance changes at -2°C. Therefore, it can be seen that even if a cleaning composition contains a relatively large amount of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of moles of ethylene oxide added of 6 or less, the inclusion of alkyl sulfosuccinic acid or its salt results in excellent suppression of appearance changes at -2°C.

[0138] (Evaluation results: Example B1, Comparative Example B1) Table 7 shows the evaluation results for suppressing appearance changes due to low temperatures in the cleaning composition of Example B1 and the cleaning composition of Comparative Example B1.

[0139] [Table 7]

[0140] As shown in Table 7, the cleaning composition of Example B1, which contains alkyl sulfosuccinic acid or its salt, was excellent in suppressing appearance changes at -10°C, even though it contained 2% by mass of polyoxyethylene alkyl ether carboxylic acid or its salt (polyoxyethylene lauryl ether acetate sodium (10 E.O.)) with an average number of added moles of ethylene oxide exceeding 6. On the other hand, the cleaning composition of Comparative Example B1, which does not contain alkyl sulfosuccinic acid or its salt, but contains 2% by mass of polyoxyethylene alkyl ether carboxylic acid or its salt (polyoxyethylene lauryl ether acetate sodium (10 E.O.)) with an average number of added moles of ethylene oxide exceeding 6, was inferior to the cleaning composition of Example B1 in suppressing appearance changes at -10°C. Therefore, it can be seen that even if a cleaning composition contains a relatively large amount of polyoxyethylene alkyl ether carboxylic acid or its salt with an average number of added moles of ethylene oxide exceeding 6, the inclusion of alkyl sulfosuccinic acid or its salt provides excellent suppression of appearance changes at -10°C.

Claims

1. Polyoxyethylene alkyl ether carboxylic acid or a salt thereof having an average number of moles of ethylene oxide added of 6 or less, One or more selected from alkyl sulfosuccinic acid or its salts, α-olefin sulfonic acid or its salts, and acylmethylalanine or its salts, It is formulated with The amount of polyoxyethylene alkyl ether carboxylic acid or a salt thereof, in which the average number of moles added of the ethylene oxide is 6 or less, exceeds 1% by mass. The pH at 25°C is between 4.2 and 7.

5. Cleaning composition.

2. Polyoxyethylene alkyl ether carboxylic acids or salts thereof with an average number of moles added of ethylene oxide exceeding 6, and One or more selected from alkyl sulfosuccinic acid or its salts, α-olefin sulfonic acid or its salts, and acylmethylalanine or its salts, It is formulated with The amount of polyoxyethylene alkyl ether carboxylic acid or a salt thereof, in which the average number of moles added of the ethylene oxide exceeds 6, exceeds 1% by mass. The pH at 25°C is between 4.2 and 7.

5. Cleaning composition.

3. The cleaning composition according to claim 1 or claim 2, wherein at least alkyl sulfosuccinic acid or a salt thereof is included as one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof.

4. The cleaning composition according to claim 1 or 2, wherein one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof are combined, and at least alkyl sulfosuccinic acid or a salt thereof and α-olefin sulfonic acid or a salt thereof, or at least alkyl sulfosuccinic acid or a salt thereof and acylmethylalanine or a salt thereof.

5. The cleaning composition according to claim 1 or claim 2, wherein one or more selected from alkyl sulfosuccinic acid or a salt thereof, α-olefin sulfonic acid or a salt thereof, and acylmethylalanine or a salt thereof are combined, and at least alkyl sulfosuccinic acid or a salt thereof and α-olefin sulfonic acid or a salt thereof.

6. A cleansing composition according to claim 1 or claim 2, used for cleansing hair and / or skin.

7. A method for washing hair and / or skin using the washing composition described in claim 1 or claim 2.

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