Cleaning composition and cleaning method

Abstract

The present invention provides a cleaning composition with increased viscosity, even when a surfactant that does not easily increase viscosity is incorporated, and a cleaning method using the cleaning composition. [Solution] The cleaning composition of the present invention is characterized by comprising (A) an amine oxide and (B) at least one anionic surfactant selected from the group consisting of alkyl sulfosuccinic acid or a salt thereof, ether carboxylic acid or a salt thereof with an average addition mole of polyoxyethylene of less than 10, acylmethyl taurine or a salt thereof, acyl lactic acid or a salt thereof, acyl aspartic acid or a salt thereof, acyl methyl alanine or a salt thereof, and acyl sarcosine or a salt thereof. Furthermore, the cleaning method of the present invention is characterized by using the cleaning composition of the present invention.

Description

[Technical Field]

[0001] This invention relates to a cleaning composition and a cleaning method using the same. [Background technology]

[0002] In cleansing compositions such as shampoos, surfactants are included to ensure cleansing and other functions. Such cleansing compositions often require a certain level of viscosity for ease of use. Therefore, attempts have been made to increase the overall viscosity of cleansing compositions by adding thickening agents in addition to surfactants.

[0003] For example, Patent Document 1 discloses that, in light of the low viscosity of a hard surface cleaning agent composition combining a diphenyl ether disulfonic acid type surfactant and a water-soluble solvent, the viscosity can be increased and dripping suppressed by further incorporating a polysaccharide as a thickening agent. Furthermore, Patent Document 2 discloses that in a concentrated skin and hair cleaning agent composition composed of an anionic surfactant and an amphoteric surfactant, the viscosity of a 3 to 8 times diluted solution can be adjusted to a specific range by further including a polymeric thickening agent.

[0004] Furthermore, Patent Document 3 discloses a technique for thickening a composition used in hair shampoos, body soaps, facial cleansers, hand soaps, etc., by adjusting the pH, which contains an amino acid-based anionic surfactant of a specific structure and an amphoteric surfactant having a betaine structure. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-157796 [Patent Document 2] Japanese Patent Publication No. 2001-316227 [Patent Document 3] Japanese Patent Application Laid-Open No. 2018-188390

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0006] However, as described in Patent Documents 1 and 2, when a polysaccharide or a polymer thickener is blended in a cleaning composition, there is a risk that the feel during use and the stability of the cleaning composition may deteriorate. Further, in the technique described in Patent Document 3, depending on the type of surfactant blended in the cleaning composition, thickening may hardly be expected in some cases.

[0007] On the other hand, even when a surfactant with low viscosity increase is blended in a cleaning composition, development of a new technique for increasing the viscosity of the composition is also required.

[0008] The present invention has been made in view of the above circumstances, and an object thereof is to provide a cleaning composition having an increased viscosity even when a surfactant with low viscosity increase is blended, and a cleaning method using the cleaning composition.

MEANS FOR SOLVING THE PROBLEMS

[0012] The present invention will be described below based on an embodiment of the present invention (hereinafter referred to as "this embodiment").

[0013] <Cleaning composition> The cleaning composition of this embodiment contains (A) an amine oxide (hereinafter sometimes referred to as "component (A)") and (B) at least one anionic surfactant selected from the group consisting of alkyl sulfosuccinic acid or a salt thereof, ether carboxylic acid or a salt thereof with an average addition mole of polyoxyethylene of less than 10, acylmethyl taurine or a salt thereof, acyl lactic acid or a salt thereof, acyl aspartic acid or a salt thereof, acyl methyl alanine or a salt thereof, and acyl sarcosine or a salt thereof (hereinafter sometimes referred to as "anionic surfactant of (B)" or "component (B)").

[0014] Component (B) is an anionic surfactant that, when combined with components other than component (A), does not significantly increase the viscosity of the cleaning composition. However, by combining component (B) with component (A), the viscosity of the cleaning composition can be increased.

[0015] (A) component The cleaning composition of this embodiment may contain one or more amine oxides as component (A). The amine oxides are, for example, represented by the following general formula (1) or general formula (2).

[0016] R a -(CH3)2N + -O - (1) [In the above general formula (1), R aThis represents a saturated or unsaturated hydrocarbon group (which may be linear or branched), for example, a hydrocarbon group having 8 to 18 carbon atoms.

[0017] R b -CONH-(CH2)3-(CH3)2N + -O - (2) [In the above general formula (2), R b This represents a saturated or unsaturated hydrocarbon group (which may be linear or branched), for example, a hydrocarbon group having 8 to 24 carbon atoms.

[0018] The amine oxide may be, for example, an amine oxide having a hydrocarbon group with 8 to 24 carbon atoms, and from the viewpoint of further increasing the viscosity of the cleaning composition, an amine oxide having a linear hydrocarbon group with 12 carbon atoms is preferred. The amine oxide having a hydrocarbon group with 8 to 24 carbon atoms may be selected from alkyldimethylamine oxide, alkenyldimethylamine oxide, alkylamidopropyldimethylamine oxide, and alkenylamidopropyldimethylamine oxide.

[0019] Examples of amine oxides used in cosmetic labeling include decylamine oxide, lauramine oxide, oleamine oxide, stearamine oxide, cocoamine oxide, myristamine oxide, behenamine oxide, decyltetradecylamine oxide, lauramidopropylamine oxide, myristamidopropylamine oxide, and cocamidopropylamine oxide. Among these, lauramine oxide, stearamine oxide, and lauramidopropylamine oxide are preferred because they have a strong effect in increasing the viscosity of the cleansing composition, with lauramine oxide and lauramidopropylamine oxide being more preferred, and lauramine oxide being even more preferred.

[0020] The blending amount of component (A) in the cleaning composition of the present embodiment is, for example, 0.1% by mass or more, and from the viewpoint of further increasing the viscosity of the cleaning composition, 0.5% by mass or more is preferable, and 1.0% by mass or more is more preferable. Further, the blending amount of component (A) in the cleaning composition of the present embodiment is, for example, 20% by mass or more, and from the viewpoint of reducing the risk of skin irritation, 15% by mass or less is preferable, and 10% by mass or less is more preferable.

[0021] (B) Anionic surfactant The cleaning composition of the present embodiment contains, as the anionic surfactant of (B), at least one selected from the group consisting of alkyl sulfosuccinic acid or its salt, ether carboxylic acid or its salt having an average addition mole number of polyoxyethylene less than 10, acyl methyl taurine or its salt, acyl lactic acid or its salt, acyl aspartic acid or its salt, acyl methyl alanine or its salt, and acyl sarcosine or its salt.

[0022] (B) The anionic surfactant is a component having a cleaning function in the cleaning composition. On the other hand, as described above, even when combined with components other than component (A), it is an anionic surfactant that is unlikely to increase the viscosity of the cleaning composition. However, by being blended with component (A), it becomes possible to adjust the cleaning composition to a viscosity suitable for application.

[0023] The cleaning composition of the present embodiment may contain one or more alkyl sulfosuccinic acids or their salts as the anionic surfactant of (B). As the alkyl sulfosuccinic acid or its salt, for example, those represented by the following general formula (3) can be used.

[0024] R c -O-(CH2CH2O) x -CO-CH(SO3X d )-CH2-COOX e (3) [In the above general formula (3), R cThis 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. d , X e X represents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, or amino acids. d , X e These values ​​may be the same or different. x represents the average number of moles of ethylene oxide added, and is between 0 and 20.

[0025] Alkyl sulfosuccinate or its salt may be, for example, an alkyl sulfosuccinate or its salt having hydrocarbon groups with 12 to 24 carbon atoms, or an alkyl polyoxyethylene sulfosuccinate or its salt having hydrocarbon groups with 12 to 24 carbon atoms. The average number of moles of ethylene oxide added to the alkyl polyoxyethylene sulfosuccinate or its salt may be, for example, 0.5 to 20, or 2 to 6. Examples of "salts" of alkyl sulfosuccinate include alkali metal salts (sodium salts, potassium salts, etc.), alkaline earth metal salts, ammonium salts, alkanolamine salts, and amino acid salts.

[0026] Examples of alkyl sulfosuccinates or their salts include lauryl sulfosuccinate or its salt, cetostearyl sulfosuccinate or its salt, and diethylhexyl sulfosuccinate or its salt. Furthermore, examples of the alkyl sulfosuccinates or their salts used as ingredient names in cosmetics include disodium lauryl sulfosuccinate, disodium cetearyl sulfosuccinate, disodium lauryl sulfosuccinate, and sodium diethylhexyl sulfosuccinate.

[0027] Examples of alkyl polyoxyethylene sulfosuccinate or its salts 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 alkyl sulfosuccinate or its salts, as ingredient names in cosmetics, include 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-7-2 Examples include sodium, 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.

[0028] The cleaning composition of this embodiment may contain, as the anionic surfactant of (B), one or more ether carboxylic acids or salts thereof (hereinafter sometimes referred to as "specific ether carboxylic acids or salts thereof") with an average addition mole number of less than 10 of polyoxyethylenes. As the ether carboxylic acid or salt thereof with an average addition mole number of less than 10 of polyoxyethylenes, for example, one represented by the following general formula (4) can be used.

[0029] R f -O-(CH2CH2O) y -CH2-COOX g (4) [In the above general formula (4), R f This 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. grepresents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, or amino acids. y represents the average number of moles added of ethylene oxide, and is between 0.5 and 10.

[0030] As the specific ether carboxylic acid or its salt, for example, a polyoxyethylene alkyl ether carboxylic acid or its salt having hydrocarbon groups with 12 to 24 carbon atoms may be used if the average number of added moles of polyoxyethylene is 0.5 or more and less than 10, or if the average number of added moles of polyoxyethylene is 2 or more and less than 7.

[0031] Examples of specific ether carboxylic acids or their salts include polyoxyethylene lauryl ether carboxylic acids or their salts in which the average number of added moles of polyoxyethylene is 2 or more and less than 10 (e.g., sodium polyoxyethylene lauryl ether acetate (3E.O.), sodium polyoxyethylene lauryl ether acetate (4.5EO)), and polyoxyethylene tridecyl ether carboxylic acids or their salts in which the average number of added moles of polyoxyethylene is 2 or more and less than 10.

[0032] Examples of specific ether carboxylic acids or their salts, as listed in cosmetic ingredient labels, include laureth-3 carboxylic acid, potassium laureth-3 carboxylic acid, sodium laureth-3 carboxylic acid, TIPA laureth-3 carboxylic acid, 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.

[0033] The cleaning composition of this embodiment may contain one or more acylmethyltaurines or salts thereof as the anionic surfactant of (B). As the acylmethyltaurine or salt thereof, for example, one represented by the following general formula (5) can be used.

[0034] R h -CO-N(CH3)-CH2CH2SO3X i (5) [In the above general formula (5), R h 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. i This represents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, amino acids, or taurine or its salts (such as sodium taurine).

[0035] As acylmethyltaurine or its salts, for example, acylmethyltaurine or its salts having hydrocarbon groups with 12 to 24 carbon atoms may be used (e.g., caproylmethyltaurine or its salts, lauroylmethyltaurine or its salts, coconut oil fatty acid methyltaurine or its salts, myristoylmethyltaurine or its salts, palmitoylmethyltaurine or its salts, stearoylmethyltaurine or its salts, oleoylmethyltaurine or its salts, oleoylmethyltaurine or its salts, etc.). Examples of "salts" of acylmethyltaurine include alkali metal salts (sodium salts, potassium salts, etc.), alkaline earth metal salts, ammonium salts, alkanolamine salts, and amino acid salts.

[0036] Examples of acylmethyltaurine or its salts used as ingredient names in cosmetics include sodium caproylmethyltaurate, sodium lauroylmethyltaurate, potassium cocoylmethyltaurate, magnesium cocoylmethyltaurate, sodium cocoylmethyltaurate, sodium cocoylmethyltaurate, sodium myristoylmethyltaurate, sodium palmitoylmethyltaurate, sodium stearoylmethyltaurate, and sodium oleoylmethyltaurate.

[0037] The cleaning composition of this embodiment may contain one or more acyl lactic acid or salts thereof as the anionic surfactant of (B). As the acyl lactic acid or salt thereof, for example, one represented by the following general formula (6) can be used.

[0038] R j -COO-CH(CH3)COO-CH(CH3)COOX k (6) [In the above general formula (6), R j 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. k This represents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, and amino acids.

[0039] As the acyllactic acid or its salt, for example, an acyllactic acid or its salt having a hydrocarbon group with 7 to 24 carbon atoms may be used.

[0040] Examples of acyl lactic acid or its salts used as ingredient names in cosmetics include sodium caproyl lactylate, sodium (caproyl / lauroyl) lactylate, sodium lauroyl lactylate, sodium stearoyl lactylate, calcium stearoyl lactylate, sodium isostearoyl lactylate, and sodium behenoyl lactylate.

[0041] The cleaning composition of this embodiment may contain one or more acyl aspartic acid or salts thereof as the anionic surfactant of (B). As the acyl aspartic acid or salt thereof, for example, one represented by the following general formula (7) can be used.

[0042] R l -CONH-CH(COOX m )-CH2COOX n (7) [In the above general formula (7), R lThis 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. m、 X n X represents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, and amino acids. m、 X n They may be the same or they may be different.

[0043] As the acyl aspartic acid or its salt, for example, an acyl aspartic acid or its salt having a hydrocarbon group with 7 to 24 carbon atoms may be used.

[0044] Examples of acyl aspartic acid or its salts used as ingredient names in cosmetics include sodium lauroyl aspartate, zinc lauroyl aspartate, sodium acyl(C12,14) aspartate, acyl(C12,14) aspartate TEA, and palmitoyl aspartate 2TEA.

[0045] The cleaning composition of this embodiment may contain one or more acylmethylalanine or salts thereof as the anionic surfactant of (B). As the acylmethylalanine or salt thereof, for example, one represented by the following general formula (8) can be used.

[0046] R o -CO-N(CH3)-CH2CH2-COOX p (8) [In the above general formula (8), R o 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. p This represents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, or amino acids.

[0047] Examples of acylmethylalanine or its salts include acylmethylalanine or its salts having hydrocarbon groups with 7 to 24 carbon atoms (such as lauroylmethylalanine or its salts (e.g., sodium lauroylmethyl-β-alanine), cocoylmethylalanine or its salts, myristoylmethylalanine or its salts).

[0048] Examples of acylmethylalanine or its salts used as ingredient names in cosmetics include lauroylmethylalanine, lauroylmethylalanine K, lauroylmethylalanine Na, lauroylmethylalanine TEA, cocoylmethylalanine, cocoylmethylalanine Na, myristoylmethylalanine, and myristoylmethylalanine Na.

[0049] The cleaning composition of this embodiment may contain one or more acyl sarcosines or salts thereof as the anionic surfactant of (B). As the acyl sarcosine or salt thereof, for example, one represented by the following general formula (9) can be used.

[0050] R q -CO-N(CH3)-CH2-COOX r (9) [In the above general formula (9), R q 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. r This represents hydrogen, alkali metals, alkaline earth metals, ammonium, alkanolamines, or amino acids.

[0051] As the acyl sarcosine or its salt, for example, an acyl sarcosine or its salt having a hydrocarbon group with 7 to 24 carbon atoms may be used.

[0052] Examples of acyl sarcosine or its salts used as ingredient names in cosmetics include lauroyl sarcosine, sodium lauroyl sarcosine, potassium lauroyl sarcosine, TEA lauroyl sarcosine, cocoyl sarcosine, sodium cocoyl sarcosine, potassium cocoyl sarcosine, TEA cocoyl sarcosine, sodium myristoyl sarcosine, sodium palmitoyl sarcosine, oleoyl sarcosine, and sodium oleoyl sarcosine.

[0053] As the anionic surfactant (B) in the cleaning composition of this embodiment, alkyl sulfosuccinic acid or its salt, acylmethyl taurine or its salt, or acyl aspartic acid or its salt are preferred from the viewpoint of being able to prepare a cleaning composition with higher viscosity, and alkyl sulfosuccinic acid or its salt, acylmethyl taurine or its salt are more preferred from the viewpoint of being able to prepare a cleaning composition that foams better.

[0054] Furthermore, as the anionic surfactant (B) in the cleaning composition of this embodiment, alkyl sulfosuccinic acid or its salt, or ether carboxylic acid or its salt with an average addition mole of polyoxyethylene of less than 10 are preferred from the viewpoint of excellent sebum removal. Furthermore, as the anionic surfactant (B) in the cleaning composition of this embodiment, disodium laureth sulfosuccinate or sodium laureth-6 carboxylate are more preferred from the viewpoint of excellent sebum removal even under low temperature conditions (for example, 5°C to 20°C).

[0055] The amount of component (B) in the cleaning composition of this embodiment is, for example, 0.1% by mass or more, preferably 0.5% by mass or more, and more preferably 1.0% by mass or more, from the viewpoint of further increasing the viscosity of the cleaning composition. Furthermore, the amount of component (B) in the cleaning composition of this embodiment is, for example, 35% by mass or less, preferably 30% by mass or less, and more preferably 25% by mass or less, from the viewpoint of reducing the risk of skin irritation.

[0056] In this embodiment, the cleaning composition has, for example, a mass ratio of the amount of component (B) to the amount of component (A) (the mass ratio of the amount of component (B) when the amount of component (A) is set to 1) of 0.1 or more and 20 or less.

[0057] water The cleaning composition of this embodiment contains water as a solvent. The amount of water in the cleaning composition of this embodiment is not particularly limited and can be set as appropriate, but for example, it is 60% by mass or more and 90% by mass or less.

[0058] Compatible ingredients In addition to the components described above, the cleansing composition of this embodiment may also contain various components found in various cleansing agents (cleansing cosmetics), including ordinary shampoos and other hair cleansers, and skin cleansers, as needed. Examples of such components that can be added include acids, alkalis; cationic polymers; surfactants (other than those described above); preservatives; inorganic salts; oils (lanolin derivatives, liquid paraffin, higher fatty acids, higher alcohols, esters, silicone oils, etc.); conditioning agents; antioxidants and chelating agents to prevent discoloration and oxidation; anti-inflammatory agents; anti-dandruff agents; bactericides; UV absorbers; fragrances; and pearlescent agents.

[0059] The cleaning composition of this embodiment may contain an acid. Examples of the acid include one or more organic acids (e.g., citric acid, lactic acid, glycolic acid, malic acid, succinic acid) and inorganic acids (e.g., phosphoric acid). The amount of acid in the cleaning composition of this embodiment should be such that the pH of the cleaning composition at 25°C can be adjusted to a suitable range described later, but specifically, for example, it is 0.01% by mass or more and 2% by mass or less.

[0060] The cleaning composition of this embodiment may contain an alkali. Examples of alkalis include one or more inorganic alkalis (e.g., potassium hydroxide, sodium hydroxide, ammonia) and organic alkalis (e.g., aminoethylpropanol, arginine, triethanolamine). The amount of alkali in the cleaning composition of this embodiment should be such that the pH of the cleaning composition at 25°C can be adjusted to a preferred range described later, but specifically, for example, it is 0.01% by mass or more and 2% by mass or less.

[0061] The cleaning composition of this embodiment may also contain a cationic polymer. Examples of cationic polymers include cationized cellulose (O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride (polyquaternium-10), polyquaternium-4, etc.), cationized guar gum (O-[2-hydroxy-3-(trimethylammonio)propyl]guar gum chloride, etc.), vinylpyrrolidone-N,N-dimethylaminoethyl methacrylate copolymer diethyl sulfate, polydimethylmethylene piperidinium chloride, and ionic polymers containing diallyl quaternary ammonium chloride as constituent units (dimethyldiallylammonium chloride-acrylamide copolymer (polyquaternium-7), dimethyldimethyl Examples include allylammonium / acrylic acid copolymer (Polyquaternium-22), acrylamide / acrylic acid / dimethyldiallylammonium chloride copolymer (Polyquaternium-39), 2-methacryloyloxyethyl phosphorylcholine / 2-hydroxy-3-methacryloyloxypropyltrimethylammonium chloride copolymer (Polyquaternium-64), Polyquaternium-47, Polyquaternium-52, Polyquaternium-53, acrylic acid / acrylamide / methacrylamidopropyltrimonium chloride, cationized starch, and cationized polypeptide. Only one of these may be used, or two or more may be used in combination. Note that the above examples of Polyquaternium-10, Polyquaternium-4, Polyquaternium-7, Polyquaternium-22, Polyquaternium-39, Polyquaternium-64, Polyquaternium-47, Polyquaternium-52, and Polyquaternium-53 are cosmetic labeling names. The amount of cationic polymer in the cleaning composition of this embodiment is, for example, 0.01% by mass or more and 2% by mass or less.

[0062] The cleaning composition of this embodiment may or may not contain amphoteric surfactants other than amine oxides. Amphoteric surfactants other than amine oxides are known amphoteric surfactants other than amine oxides that are used in cleaning compositions, and examples include alkylbetaine type amphoteric surfactants (such as lauryl betaine), fatty acid amide alkylbetaine type amphoteric surfactants (such as cocamidopropyl betaine), imidazoline type amphoteric surfactants (such as sodium cocoamphoacetate), and sulfobetaine type amphoteric surfactants (such as lauryl hydroxysultaine).

[0063] Furthermore, even if the cleaning composition of this embodiment does not contain or limits the amount of amphoteric surfactants other than amine oxide, it can still provide a cleaning composition with increased viscosity because it uses amine oxide. When limiting the amount of amphoteric surfactants other than amine oxide in the cleaning composition of this embodiment, it may be, for example, 2% by mass or less, 1% by mass or less, 0.5% by mass or less, 0.1% by mass or less, 0.01% by mass or less, or 0.001% by mass or less. Therefore, the cleaning composition of this embodiment may, for example, contain no amphoteric surfactants other than amine oxide, or the amount of amphoteric surfactants other than amine oxide may be 2% by mass or less.

[0064] others The pH of the cleaning composition of this embodiment at 25°C is, for example, 3.0 to 8.0. Hereinafter, in this specification, the pH at 25°C will be simply referred to as "pH". pH is the value measured using a known pH meter for the cleaning composition of this embodiment at 25°C.

[0065] Furthermore, the pH of the cleaning composition is preferably 4.0 or higher, preferably less than 7, more preferably 6.0 or lower, and even more preferably 5.5 or lower, as this can increase its viscosity.

[0066] In the cleaning composition of this embodiment, the viscosity can be 5 mPa·s or higher. The viscosity of the cleaning composition as used herein was measured using a rheometer (for example, a stress-controlled rheometer "Rheo Stress 6000" (product name) manufactured by HAAKE) under the following conditions: measurement temperature: 25°C, cone plate sensor diameter: 35 mm, cone plate sensor tilt angle: 2°, steady-state flow curve mode, waiting time of 1 minute, with a shear rate of 36 s². -1 This is the steady-state flow viscosity measured by [the specified method].

[0067] If the cleaning composition has the viscosity value described above, it can be easily applied to the object by, for example, taking it with your hands or a brush. From the viewpoint of further improving this applicability, the viscosity of the cleaning composition is preferably 5 mPa·s or higher, and more preferably 40 mPa·s or higher. The upper limit of the viscosity of the cleaning composition is, for example, 300,000 mPa·s.

[0068] The dosage form of the cleaning composition in this embodiment is usually liquid, but it may also be a paste, for example, as long as the steady-state flow viscosity is within the range that satisfies the above preferred value.

[0069] The product form of the cleansing composition of this embodiment is not particularly limited, but examples include cleansing agents for hair such as hair shampoo, scalp shampoo, and hair and scalp shampoo, and cleansing agents for skin such as body shampoo, body soap, hand soap, facial cleanser, makeup remover, and more.

[0070] The cleaning composition of this embodiment can be manufactured by employing a known manufacturing method for cleaning compositions according to the dosage form.

[0071] The cleansing composition of this embodiment may be used for cleansing hair, or for cleansing skin (scalp and other skin), or for cleansing both hair and skin (scalp and other skin).

[0072] <Cleaning method> The cleaning method of this embodiment uses the cleaning composition of this embodiment described above. The cleaning method of this embodiment may be a method for cleaning hair or skin (scalp and other skin). The cleaning method of this embodiment can be used for cleaning hair or hair and scalp in the same way as a normal hair cleaning composition (such as a hair shampoo used to clean wet hair). Furthermore, the cleaning method of this embodiment can be used for cleaning skin in the same way as a normal skin cleaning composition (such as a body shampoo used to clean wet skin). [Examples]

[0073] The present invention will be described in detail below based on examples. However, the following examples are not intended to limit the present invention. In Tables 1 and 2 below, the amount of each component is shown in percentages so that it equals 100% of the entire cleaning composition. These percentages are by mass, and in these tables, the percentage notation is omitted, and only the numerical value representing the amount is shown.

[0074] Examples 1-7 and Comparative Examples 1 and 2 The cleaning compositions (liquid formulations) of Examples 1 to 7 and Comparative Examples 1 and 2 were prepared by mixing them using a conventional method to obtain the compositions shown in Table 1, using lauramine oxide (component (A)); disodium laureth sulfosuccinate, sodium laureth-6 carboxylate, sodium cocoyl methyl taurate, sodium lauroyl lactylate, sodium lauroyl aspartate, sodium lauroyl methyl alanine, and sodium lauroyl sarcosinate (all of which are components (B)); sodium laureth-11 carboxylate; citric acid; and water.

[0075] Then, the pH and viscosity of each cleaning composition in Examples 1-7 and Comparative Examples 1 and 2 were measured using the method described above. These results are shown in Table 1. In Table 1, "appropriate amount" in the citric acid column means the amount required to adjust the pH of each cleaning composition in each example and comparative example to the value shown in Table 1, and "total 100" in the water column means that the total amount of each component other than water added to the cleaning composition was made to 100% (the same applies to Table 2 below).

[0076] [Table 1]

[0077] As shown in Table 1, the cleaning compositions of Examples 1 to 7, which contained lauramine oxide (component A) and any of the following components (B): disodium laureth sulfosuccinate, sodium laureth-6 carboxylate, sodium cocoyl methyl taurate, sodium lauroyl lactylate, sodium lauroyl aspartate, sodium lauroyl methylalanine, and sodium lauroyl sarcosinate, had higher viscosity than the cleaning composition of Comparative Example 1, which did not contain component (B), and the cleaning composition of Comparative Example 2, which contained sodium laureth-11 carboxylate (an ether carboxylic acid with an average addition mole of polyoxyethylene of 10 or more) instead of component (B).

[0078] Examples 8-10 and Comparative Examples 3-10 Lauramine oxide, stearamine oxide, lauramidopropylamine oxide (all components (A)); lauryl betaine; cocamidopropyl betaine; isostearamidopropyl betaine; lauramidopropyl hydroxysultaine; sodium cocoamphoacetate; sodium lauaminopropionate; (C12,14) oxyhydroxypropylarginine HCl; disodium laureth sulfosuccinate (component (B)); sodium laureth-11 carboxylate; citric acid; and water were used to prepare the cleaning compositions (liquid formulations) of Examples 8-10 and Comparative Examples 3-10 by mixing them using conventional methods to obtain the compositions shown in Table 2.

[0079] Then, the pH and viscosity of each cleaning composition in Examples 8-10 and Comparative Examples 3-10 were measured using the method described above. These results are shown in Table 2.

[0080] [Table 2]

[0081] The cleaning composition of Comparative Example 3 is an example that does not contain component (A), while the cleaning compositions of Comparative Examples 4 to 10 are examples in which other amphoteric surfactants are used in place of component (A). As shown in Table 2, the cleaning compositions of Examples 8 to 10, which contain one of the components (A) lauramine oxide, stearamine oxide, or lauramidopropylamine oxide and component (B) disodium laureth sulfosuccinate, had a higher viscosity than the cleaning compositions of Comparative Examples 4 to 10.

[0082] As shown in Table 1, the viscosity of the cleaning composition of Comparative Example 1, which contained component (A) but not component (B), was lower than that of the cleaning composition of the Example. As shown in Table 2, the viscosity of the cleaning composition of Comparative Example 3, which contained component (B) but not component (A), was lower than that of the cleaning composition of the Example. Therefore, the increase in viscosity observed in the cleaning composition of the Example can be attributed to the synergistic effect of combining component (A) and component (B).

[0083] Example 8-2 and Comparative Examples 3-2, 4-2 Cleaning compositions were prepared by adjusting the pH to the values ​​shown in Table 3 by changing the proportions of citric acid and water from the cleaning compositions of Example 8 and Comparative Examples 3 and 4. These cleaning compositions from the examples and comparative examples, in which the pH was changed only by altering the proportions of citric acid and water, are referred to as the cleaning compositions of Example 8-2 and Comparative Examples 3-2 and 4-2. Viscosity measurements were also performed on these cleaning compositions using the method described above. The results are also shown in Table 3.

[0084] [Table 3]

[0085] As shown in Table 3, in the cleaning composition of Comparative Example 3-2, which did not contain component (A), and the cleaning composition of Comparative Example 4-2, which contained another amphoteric surfactant (lauryl betaine) in place of component (A), there was almost no effect on viscosity when the pH was changed. In contrast, in the cleaning composition of Example 8-2, the viscosity became particularly high when the pH was between 4.0 and 6.0. Although the viscosity of the cleaning composition of Example 8-2 at pH less than 4.0 and above 6.0 was relatively lower than the viscosity at pH between 4.0 and 6.0, it still had a higher viscosity compared to the viscosity of the cleaning compositions of Comparative Examples 3-2 and 4-2 at pH less than 4.0 and above 6.0.

[0086] Examples 9-2, 10-2 and Comparative Examples 3-2, 4-2 Cleaning compositions were prepared by adjusting the pH to the values ​​shown in Table 4 by changing the proportions of citric acid and water from the cleaning compositions of Examples 9, 10 and Comparative Examples 3 and 4. These cleaning compositions from the examples and comparative examples, in which the pH was changed only by altering the proportions of citric acid and water, are referred to as the cleaning compositions of Examples 9-2, 10-2 and Comparative Examples 3-2 and 4-2. Viscosity measurements were also performed on these cleaning compositions using the method described above. The results are also shown in Table 4.

[0087] [Table 4]

[0088] As shown in Table 4, in the cleaning composition of Comparative Example 3-2, which did not contain component (A), and in the cleaning composition of Comparative Example 4-2, which contained another amphoteric surfactant (lauryl betaine) instead of component (A), there was almost no effect on viscosity when the pH was changed. In contrast, the cleaning compositions of Examples 9-2 and 10-2 showed increased viscosity when compared under the same pH conditions as Comparative Examples 3-2 and 4-2.

[0089] Reference examples 1~4 We prepared aqueous solutions of each surfactant from the following Reference Examples 1-3, and water from Reference Example 4. Reference Example 1: 1% by mass of disodium laureth sulfosuccinate and 99% by mass of water Reference Example 2: 1% by mass of sodium laureth-6 carboxylate, 99% by mass of water Reference Example 3: 1% by mass of PEG-8 glyceryl isostearate and 99% by mass of water

[0090] The artificial sebum removal test was performed according to the following procedure (1) to (5). (1) Multiple test specimens were prepared by applying 0.3 g of melted artificial sebum to several collagen plates (made by attaching collagen casings tightly to the surface of a glass slide), and the mass (g) of each test specimen was measured. The composition of the artificial sebum was 10% by mass of squalene, 17% by mass of isocetyl stearate, 2% by mass of lanolin fatty acid cholesteryl, 2% by mass of cholesterol, 35% by mass of macadamia nut oil, 4% by mass of glyceryl stearate, 3% by mass of myristic acid, 12% by mass of palmitic acid, 3% by mass of stearic acid, and 12% by mass of oleic acid. (2) Each test specimen was immersed in Reference Examples 1 to 4, which were kept at 20°C, and left to stand for 10 minutes. (3) Afterwards, each test specimen was rinsed in a wash bottle and removed. (4) After drying each of the test specimens described in (3) above at room temperature for one day, the mass (g) of each test specimen was measured. (5) Using the mass (g) measured in (1) above and the mass (g) measured in (4) above, the removal rate of artificial sebum was calculated using the following formula (i). Removal rate of artificial sebum (%) = {("Mass measured in (1) above (g)" - "Mass measured in (4) above (g)") / 0.3 (Mass of artificial sebum (g))} × 100 (i)

[0091] The results of the artificial sebum removal test described above showed that the removal rates of artificial sebum were 80% for Reference Example 1 (containing disodium laureth sulfosuccinate), 82% for Reference Example 2 (containing sodium laureth-6 carboxylate), 1% for Reference Example 3 (containing PEG-8 glyceryl isostearate), and 0% for Reference Example 4 (water). From these results, Reference Example 1, which uses alkyl sulfosuccinate or its salt, and Reference Example 2, which uses a specific ether carboxylic acid or its salt, showed superior sebum removal rates even at low temperatures (20°C) compared to Reference Example 3, which uses surfactants other than component (B), and Reference Example 4, which uses water. From these results, it can be inferred that the cleansing compositions of Examples 1, 2, 8, and 9, which contain disodium laureth sulfosuccinate as component (B), have high sebum removal rates even at low temperatures (20°C).

Claims

1. (A) Amine oxide, and, (B) A cleaning composition comprising at least one anionic surfactant selected from the group consisting of alkyl sulfosuccinic acid or a salt thereof, ether carboxylic acid or a salt thereof with an average addition mole of polyoxyethylene of less than 10, acylmethyl taurine or a salt thereof, acyl lactic acid or a salt thereof, acyl aspartic acid or a salt thereof, acyl methyl alanine or a salt thereof, and acyl sarcosine or a salt thereof.

2. The cleaning composition according to claim 1, wherein (B) is at least one selected from the group consisting of alkyl sulfosuccinic acid or a salt thereof, acylmethyl taurine or a salt thereof, and acyl aspartic acid or a salt thereof.

3. The cleaning composition according to claim 1, wherein (B) contains at least disodium laureth sulfosuccinate, sodium cocoyl methyl taurate, or sodium lauroyl aspartate.

4. The cleaning composition according to claim 1, wherein the pH is 4.0 or higher and less than 7.

5. The cleaning composition according to claim 1, wherein the viscosity is 5 mPa·s or more.

6. A cleaning method using the cleaning composition described in any one of claims 1 to 5.

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