Liquid detergent composition

Abstract

To provide a liquid detergent composition that achieves both cleaning and disinfecting power, and also exhibits excellent stability of silver compounds at high temperatures. [Solution] A liquid detergent composition comprising (A) component: an alkanolamine represented by the following formula (a), (B) component: a chelating agent, (C) component: a surfactant comprising one or more selected from the group consisting of anionic surfactants (C1), nonionic surfactants (C2), amphoteric surfactants (C3), and semipolar surfactants (C4), and (D) component: a silver compound, wherein the pH at 25°C is 6 to 11. [C1] TIFF2026105304000022.tif48170

Description

[Technical Field]

[0001] This invention relates to a liquid detergent composition. [Background technology]

[0002] Currently, with consumers' increased awareness of hygiene, liquid detergent compositions require disinfecting properties. Silver compounds are known to be excellent disinfecting compounds. Conventionally, a hard surface cleaning agent composition (Patent Document 1) has been disclosed that combines an alkaline anionic surfactant with a silver compound, possessing both antibacterial properties and cleaning performance against sebum stains. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-076103 [Overview of the project] [Problems that the invention aims to solve]

[0004] However, conventional bathroom cleaning compositions containing silver compounds have stability issues, such as the formation of precipitates in long-term high-temperature environments. Simply reducing the amount of silver compound to improve stability reduces the disinfecting power, and lowering the pH reduces the cleaning power, making it difficult to achieve both cleaning power and disinfecting power simultaneously.

[0005] The present invention aims to provide a liquid detergent composition that achieves both cleaning power and disinfecting power, and also exhibits excellent stability of silver compounds at high temperatures. [Means for solving the problem]

[0006] The present invention has the following aspects. <1> (A) Components: an alkanolamine represented by the following formula (a), (B) Ingredients: Chelating agent, (C) Components: A surfactant comprising one or more selected from the group consisting of anionic surfactants (C1), nonionic surfactants (C2), amphoteric surfactants (C3), and semipolar surfactants (C4), (D) Components: Contains silver compounds, A liquid detergent composition having a pH of 6 to 11 at 25°C. [ka] In formula (a), R 1 , R 2 and R 3 Each is independently an alkylene group or a hydroxyalkylene group, l, m and n are independently 0 to 6, where l+m+n is a number of 2 or more, and X 1 and X 2 Each of these is independently either a hydrogen atom or a hydroxyl group, except when l is 1, m and n are both numbers from 1 to 6. <2> The aforementioned component (B) includes one or more selected from the group consisting of aminocarboxylic acid chelating agents (B1), hydroxycarboxylic acid chelating agents (B2), and carboxylic acid polymer compounds (B3). <1> The liquid detergent composition described above. <3> The content of component (B) is 0.6 to 6% by mass relative to the total mass of the liquid detergent composition. <1> or <2> The liquid detergent composition described above. <4> The mass ratio expressed as [(C) component mass] / [(A) component mass] is between 0.05 and 20. <1> ~ <3> A liquid detergent composition according to any one of the items. <5> For hard surfaces, <1> ~ <4> A liquid detergent composition according to any one of the items. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a liquid detergent composition that achieves both cleaning power and disinfecting power, and further exhibits excellent stability of silver compounds at high temperatures. [Modes for carrying out the invention]

[0008] A liquid detergent composition according to an embodiment of the present invention (hereinafter, also simply referred to as "liquid detergent composition") contains a component (A), a component (B), a component (C), and a component (D).

[0009] <Component (A)> Component (A) is an alkanolamine represented by the following formula (a). By containing component (A) which is a basic compound, it forms a salt with oil stain (fatty acid) and makes it easier to remove, thereby improving the detergency. The number of hydroxyl groups in component (A) is preferably 1 to 5, more preferably 2 to 3. If the number of hydroxyl groups is within the above range, the amino group of component (A) forms a salt with the carboxy group of the oil stain (fatty acid), enhancing the affinity of component (A) for the oil stain, and the hydroxyl group increases the water solubility of the micelle that encloses the oil stain, making it easier to remove the oil stain. The total number of carbon atoms in component (A) is preferably 3 to 9, more preferably 3 to 8, and even more preferably 3 to 7.

[0010] [Chemical formula]

[0011] In formula (a), R 1 , R 2 and R 3 are each independently an alkylene group or a hydroxyalkylene group, l, m and n are each independently 0 to 6, provided that l + m + n is a number of 2 or more, X 1 and X 2 are each independently a hydrogen atom or a hydroxyl group, provided that when l is 1, m and n are both numbers of 1 to 6. l is preferably 1 to 6, more preferably 1 to 3, and even more preferably 1. m is preferably 1 to 6, more preferably 1 to 3, and even more preferably 1. n is preferably 1 to 6, more preferably 1 to 3, and even more preferably 1. m + n is preferably 0 to 6, more preferably 1 to 4, and even more preferably 2. l+m+n is preferably 2 to 8, more preferably 2 to 7, and even more preferably 2 to 5.

[0012] (A) As for component (A), an alkanolamine represented by the following formula (a-1) is preferred from the viewpoint of high cleaning power.

[0013] [ka]

[0014] In formula (a-1), X 1 and X 2 This is the same as above.

[0015] (A) Component is preferably 2-amino-2-hydroxymethyl-1,3-propanediol, 2-amino-2-methyl-1,3-propanediol, or 2-amino-2-methyl-1-propanol, with 2-amino-2-hydroxymethyl-1,3-propanediol being more preferred from the viewpoint of high cleaning power. (A) Component may be used alone or in combination of two or more types.

[0016] The content of component (A) is preferably 0.2 to 5% by mass, and more preferably 0.25 to 4% by mass, relative to the total mass of the liquid detergent composition. If the content of component (A) is within the above range, component (A) will act efficiently on oil stains and enhance the effect of component (C).

[0017] <(B) component> Component (B) is a chelating agent. In this specification, a chelating agent has multiple anionic groups. Component (B) does not have a surfactant effect and is therefore not classified as an anionic surfactant. The liquid detergent composition contains component (B), which chelates metal ions (e.g., calcium ions) in the dirt, thereby enhancing the cleaning power of component (C).

[0018] (B) The component is not particularly limited, and any general chelating agent can be used. Component (B) may be either a low molecular weight chelating agent with a molecular weight of 800 or less, or a high molecular weight chelating agent with a weight-average molecular weight of 800 or more. (B) A polydentate ligand is preferred for component (B), and a polydentate ligand in which two or more atoms can form a coordinate bond is more preferred. In this specification, the molecular weight of low molecular weight chelating agents can be measured by mass spectrometry, and the weight-average molecular weight of high molecular weight chelating agents can be calculated by a standard polystyrene equivalent method using gel permeation chromatography (GPC).

[0019] (B) Component preferably includes one or more selected from the group consisting of aminocarboxylic acid-based chelating agents (B1) and hydroxycarboxylic acid-based chelating agents (B3) as low molecular weight chelating agents, and carboxylic acid-based polymer compounds (B2) as high molecular weight chelating agents.

[0020] Examples of aminocarboxylic acid-based chelating agents include aminocarboxylic acids or their salts such as methylglycine diacetic acid or its salt, glutamate diacetic acid or its salt, nitrilotriacetic acid or its salt, ethylenediaminetetraacetic acid or its salt, diethylenetriaminepentaacetic acid or its salt, β-alanine diacetic acid or its salt, L-aspartate diacetic acid or its salt, iminodisuccinic acid or its salt, ethylenediaminedisuccinic acid or its salt, etc.; and hydroxyaminocarboxylic acids or their salts such as serine diacetic acid or its salt, hydroxyiminodisuccinic acid or its salt, hydroxyethylethylenediaminetriacetic acid or its salt, dihydroxyethylglycine or its salt, etc. Examples of hydroxycarboxylic acid chelating agents (excluding those that fall under the category of aminocarboxylic acid chelating agents) include lactic acid or its salts, malic acid or its salts, citric acid or its salts, tartaric acid or its salts, glycol or its salts, gluconic acid or its salts, etc. Among these, citric acid, methylglycine diacetic acid, glutamic acid diacetic acid, ethylenediaminetetraacetic acid, or salts thereof are preferred, as they are more effective at removing protein, oil, and sebum stains from objects to be cleaned (objects to be cleaned) at a pH near neutral. A combination of citric acid or its salt and ethylenediaminetetraacetic acid or its salt, or a combination of citric acid or its salt and methylglycine diacetic acid or its salt is even more preferred.

[0021] Examples of polymer chelating agents include those having anionic groups such as carboxyl groups or their salts, sulfo groups or their salts, or phosphate groups or their salts. Among these, carboxylic acid polymers or their salts having carboxyl groups or their salts are preferred. Examples of carboxylic acid polymers or their salts include polyacrylic acid or its salts, copolymers of acrylic acid and sulfonic acid monomers or their salts, and copolymers of maleic acid and acrylic acid or their salts. Graft polymers of carboxylic acid polymers and polyalkylene glycols or their salts can also be suitably used.

[0022] The acid value of the polymer chelating agent is preferably 300 to 1000 mg KOH / g, more preferably 450 to 900 mg KOH / g, and even more preferably 650 to 800 mg KOH / g. If the acid value of the polymer chelating agent is above the lower limit, it is easier to adjust the pH from weakly acidic to near neutral and to maintain the dissociation of component (C) appropriately. If the acid value of the polymer chelating agent is below the upper limit, it is easier to adjust the pH from weakly basic to near neutral. In this specification, the acid value can be measured in accordance with the neutralization titration method described in JIS K0070-1992.

[0023] Examples of salts that make up component (B) include alkali metal salts, alkaline earth metal salts, alkanolammonium salts, and ammonium salts. Examples of alkali metal salts include sodium salts and potassium salts. Examples of alkaline earth metal salts include magnesium salts and calcium salts. Examples of alkanol ammonium salts include monoethanolammonium salt, diethanolammonium salt, and triethanolammonium salt. These (B) components may be a single type or a combination of two or more types.

[0024] The content of component (B) is preferably 0.6 to 6% by mass, more preferably 0.7 to 5% by mass, and even more preferably 1 to 4% by mass, relative to the total mass of the liquid detergent composition. If the content of component (B) is above the lower limit, component (B) chelates metal ions in the dirt, thereby improving the surfactant effect of component (C) and enhancing the cleaning power, and improving the effect of removing protein, oil, and sebum stains from the object being cleaned. Furthermore, by chelating metal ions derived from protein stains, the protein stains are made easier to remove, and the adhesion and accumulation of protein stains on the object being cleaned can be suppressed. If the content of component (B) is below the upper limit, solubility in water is maintained and precipitation is suppressed, thereby improving high-temperature stability.

[0025] <(C) component> Component (C) is a surfactant containing one or more selected from the group consisting of anionic surfactants (C1) (hereinafter also referred to as "component (C1)"), nonionic surfactants (C2) (hereinafter also referred to as "component (C2)"), amphoteric surfactants (C3) (hereinafter also referred to as "component (C3)"), and semipolar surfactants (C4) (hereinafter also referred to as "component (C4)"). By containing component (C), the cleaning power against protein, oil, and sebum stains can be improved.

[0026] ((C1) component) (C1) Component includes, for example, sulfonic acid type anionic surfactants such as linear alkylbenzene sulfonic acid or its salt (LAS), α-olefin sulfonic acid or its salt (AOS), alkane sulfonic acid or its salt, α-sulfo fatty acid ester or its salt, α-sulfosuccinate ester or its salt, internal olefin sulfonic acid or its salt other than AOS (IOS), hydroxyalkane sulfonic acid or its salt (HAS); and sulfate ester type anionic surfactants such as linear or branched alkyl sulfate ester or its salt (AS), polyoxyalkylene alkyl (or alkenyl) ether sulfate ester or its salt (AES). Examples of anionic surfactants include carboxylic acid-type anionic surfactants such as fatty acids or their salts (soap), alkyl ether carboxylic acids or their salts, polyoxyalkylene ether carboxylic acids or their salts, alkylamide ether carboxylic acids or their salts, alkenylamide ether carboxylic acids or their salts, acylaminocarboxylic acids or their salts; and phosphate ester-type anionic surfactants such as alkyl phosphate esters or their salts, polyoxyalkylene alkyl phosphate esters or their salts, polyoxyalkylene alkylphenyl phosphate esters or their salts, glycerin fatty acid ester monophosphate esters or their salts. Examples of salt forms of these anionic surfactants include alkali metal salts (sodium salts, potassium salts, etc.), alkaline earth metal salts (magnesium salts, etc.), and alkanolammonium salts (monoethanolammonium salt, diethanolammonium salt, triethanolammonium salt, etc.). (C1) From the viewpoint of high-temperature stability, it is preferable that the component has only one anionic group in one molecule. The total number of carbon atoms in component (C1) is preferably 8 to 20, more preferably 10 to 18, and even more preferably 11 to 16.

[0027] The (C1) component is preferably an anionic surfactant represented by the following formula (c1), more preferably an anionic surfactant represented by the following formula (c1-1) (AES) or an anionic surfactant represented by the following formula (c1-2) (AOS), and even more preferably an anionic surfactant represented by the following formula (c1-1-1) or the following formula (c1-2).

[0028] R c11 -X-(R c12 ) c1 -[(EO) m (PO) n ]-Y ···(c1) In formula (c1), R c11 is a linear or branched alkyl group having 1 to 20 carbon atoms, or a linear or branched alkenyl group having 2 to 20 carbon atoms, where X is a single bond, a double bond, a phenylene group, -O-, or a hydroxyalkylene group, and R c12 is a linear or branched alkylene group having 1 to 20 carbon atoms or a linear or branched alkenylene group having 2 to 20 carbon atoms, c1 is a number of 0 or 1, EO is an oxyethylene group, m is a number of 0 or more representing the average repeating number of EO, PO is an oxypropylene group, n is a number of 0 to 6 representing the average repeating number of PO, and Y is -SO3M c11 , -CO2M c12 , or -PO3M c13 And M c11 M c12 , and M c13 Each of these is independently a hydrogen atom, or a monovalent or divalent counterion.

[0029] In equation (c1), if c1 is 0, R c11 The number of carbon atoms in the alkyl or alkenyl group is 8 to 20, preferably 8 to 18, more preferably 10 to 16, and even more preferably 12 to 14. R c11 Preferably, the alkyl group is a linear group having 8 to 18 carbon atoms, more preferably a linear group having 10 to 16 carbon atoms, and even more preferably a linear group having 12 to 14 carbon atoms. Specifically, a mixture of dodecyl groups, tridecyl groups, tetradecyl groups, etc., may be used. If c1 is 1, R c11 and R c12 The total number of carbon atoms is preferably 8 to 20, more preferably 10 to 16, and even more preferably 10 to 14.

[0030] m is preferably 0 to 5, more preferably 0 to 3, and even more preferably 0 to 2. n is between 0 and 6, preferably between 0 and 3, and more preferably 0. m+n is greater than or equal to 0, preferably between 0 and 10, and more preferably between 0 and 5.

[0031] If m and n are not 0, that is, if AES has EO and PO, then [(EO) m (PO) n There are no particular restrictions on the distribution (order of arrangement) of EO and PO in ]. They may be arranged in blocks or randomly. Also, if EO is "R c11 -X-(R c12 ) c1 - can be added to "R c11 -X-(R c12 ) c1 It may be joined with "-". Methods for arranging EO and PO in a block-like manner include, for example, introducing ethylene oxide followed by propylene oxide, introducing propylene oxide followed by ethylene oxide, introducing ethylene oxide followed by propylene oxide, and then introducing ethylene oxide again.

[0032] M c11 M c12 and M c13Examples of suitable cations include hydrogen ions and cations that can form water-soluble salts. Among these, those that can form water-soluble salts are preferred. Examples of cations that can form water-soluble salts include alkali metal ions such as sodium ions and potassium ions; alkaline earth metal ions such as magnesium ions and calcium ions; ammonium ions; and alkanol ammonium ions such as monoethanolammonium ions (monoethanolammonium salt), diethanolammonium ions (diethanolammonium salt), and triethanolammonium ions (triethanolammonium salt). Among these, alkali metal ions are preferred from the viewpoint of solubility, sodium ions and potassium ions are more preferred, and sodium ions are particularly preferred. M c11 M c12 and M c13 If the counterion is divalent or greater, M c11 M c12 and M c13 It is assumed that it is bonded to a monovalent anion by a number obtained by multiplying by 1 / valence. For example, M c11 If it is a magnesium ion, M c11 The number is 1 / 2.

[0033] R c11 -O-(EO) m -SO3 M c11 ...(c1-1) In formula (c1-1), R c11 EO, m and M c11 This is the same as above. R c11 -XR c12 -SO3 M c11 ...(c1-2) In formula (c1-2), R c11 X, R c12 and M c11 This is the same as above.

[0034] As for AES, in equation (c1-1), R c11Preferably, m is a linear or branched alkyl group having 10 to 20 carbon atoms, or a linear or branched alkenyl group having 10 to 20 carbon atoms, where m is 1 to 5. In AES, from the viewpoint of the stability of the liquid detergent composition, it is preferable that the proportion of the compound with m=0 and n=0 in formula (c1-1) is 35 to 55% by mass, relative to the total mass of the compound represented by formula (c1).

[0035] As for AOS, in equation (c1-2), R c11 R is a linear or branched alkyl group having 10 to 20 carbon atoms, c12 Preferably, is a linear or branched alkenylene group having 1 to 20 carbon atoms, and X is a double bond or a hydroxyalkylene group.

[0036] As component (C1-1), an anionic surfactant represented by the following formula (c1-1-1) is preferred.

[0037] R c11 -O-C2H4O-SO3M c11 ...(c1-1-1) In formula (c1-1-1), R c11 M c11 This is the same as above. (C1) Component may be used alone or in combination of two or more types.

[0038] ((C2) component) The (C2) component is preferably a nonionic surfactant (c2) represented by the following formula (c2), more preferably a nonionic surfactant (c2-1) represented by the following formula (c2-1), and even more preferably a garbet alcohol-type nonionic surfactant (c2-1-1) represented by the following formula (c2-1-1).

[0039] R C21 -X-[(EO) x / ( A C21 O) y ]-(EO) z -R C22 ...(c2) [In formula (c2), R C21 is a linear or branched alkyl group having 7 to 21 carbon atoms, or a linear or branched alkenyl group having 7 to 21 carbon atoms, -X- is -O-, -COO- or -CONH-, and R C22 A is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms, EO is an oxyethylene group, x is a number from 2 to 70 indicating the average number of repeats of EO, and A C21 O is an oxypropylene group or an oxybutylene group, and y is A C21 z is a number between 0 and 6 representing the average number of repetitions of O, and z is a number between 0 and 20 representing the average number of repetitions of EO.

[0040] In formula (c2), R C21 The number of carbon atoms in the alkyl or alkenyl group is 8 to 22, preferably 8 to 18, and more preferably 8 to 16. -X-bond R C21 The carbon atoms can be either primary or secondary carbon atoms.

[0041] R C22 If it is an alkyl group, the number of carbon atoms is 1 to 6, and preferably 1 to 3. R C22 If the group is an alkenyl group, the number of carbon atoms is 2 to 6, and preferably 2 to 3. R C22 Hydrogen atoms are particularly preferred.

[0042] x is between 2 and 70, preferably between 2 and 65, more preferably between 2 and 20, and even more preferably between 4 and 15. If x is above the lower limit, the number of oxygen atoms that can form hydrogen bonds increases, thereby increasing hydrophilicity and thus improving cleaning power. If x is below the upper limit, a moderate level of hydrophobicity is obtained, increasing affinity with oil stains and thus improving cleaning power. y is between 0 and 6, and preferably between 0 and 3. z is between 0 and 20, preferably between 0 and 15, and more preferably between 0 and 10. x + z is from 2 to 70, preferably from 2 to 65, more preferably from 2 to 20, and even more preferably from 2 to 15. If x + z is at least the lower limit value, the number of oxygen atoms capable of forming hydrogen bonds increases, so the hydrophilicity can be enhanced, thereby enhancing the detergency. If x + z is at most the upper limit value, appropriate hydrophobicity can be obtained while maintaining the liquid stability, so the affinity with oil stains can be enhanced, thereby enhancing the detergency.

[0043] When y is not 0, that is, when the nonionic surfactant (C2) has EO and PO, EO and BO, or EO, PO, and BO, in [(EO) x / (A C21 O) y , there is no particular limitation on the distribution (arrangement order) of EO and PO, EO and BO, or EO, PO, and BO, and they may be arranged in a block pattern or in a random pattern. Also, EO may be bonded to “R C21 -X-”, or PO or BO may be bonded to “R C21 -X-”. When y is not 0, the nonionic surfactant (C2) preferably has EO and PO, or EO and BO.

[0044] R C21 -O-(EO) x -H ···(c2 - 1) In formula (c2 - 1), R C21 , EO, and x are the same as described above.

[0045] R C23 -CHR C24 -CH2 - O-(EO) x -H ···(c2 - 1 - 1) In formula (c2 - 1 - 1), R C23 and R C24 are each independently a linear or branched alkyl group having 1 to 18 carbon atoms, or a linear or branched alkenyl group having 2 to 18 carbon atoms, and the total number of carbon atoms of R C23 and R C24 is 5 to 19, and EO and x are the same as described above.

[0046] In formula (c2-1-1), R C23 and R C24 are each independently a linear or branched alkyl group having 1 to 15 carbon atoms, or a linear or branched alkenyl group having 2 to 15 carbon atoms. The total number of carbon atoms of R C23 and R C24 is 5 to 19, preferably 5 to 17, more preferably 5 to 15, and even more preferably 5 to 10. R C23 preferably has 1 to 10 carbon atoms, more preferably 2 to 8 carbon atoms, and even more preferably 3 to 7 carbon atoms. R C24 preferably has 1 to 8 carbon atoms, more preferably 1 to 7 carbon atoms, and even more preferably 1 to 5 carbon atoms.

[0047] R C23 -CHR​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​represents an alkylene group with 1 to 4 carbon atoms, and p is the number of 0s or 1s. C32 and R c33 Each of these independently represents an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and R c34 R represents an alkylene group with 1 to 2 carbon atoms. c35 -CO2 - or -SO3 - It represents.

[0050] R in equation (c3) C31 The number of carbon atoms is preferably 10 to 14, and more preferably 11 to 14. C31 Preferably, it is an alkyl group derived from oil and fat raw materials. R C32 , R c33 Each of these is preferably an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, more preferably an alkyl group having 1 to 3 carbon atoms, and even more preferably a methyl group, R C32 and R c33 It is particularly preferable that all of them are methyl groups. R c34 The group is preferably a methylene group or an ethylene group, with the methylene group being more preferred.

[0051] Examples of carboxylate salt-type betaine-type amphoteric surfactants include lauryldimethylaminoacetic acid betaine, coconut alkyldimethylaminoacetic acid betaine, lauric acid amidopropyl dimethylaminoacetic acid betaine, and coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine (cocamidopropyl betaine). Examples of sulfonate-type betaine-type amphoteric surfactants include lauryldimethylsulfobetaine (3-(dodecyldimethylammonio)propanesulfonate) and laurylhydroxysulfobetaine (3-(dodecyldimethylammonio)-2-hydroxypropanesulfonate).

[0052] ((C4) component) Examples of the (C4) component include alkylamine oxide type semipolar surfactants and alkylamidoamine oxide type semipolar surfactants. As the (C4) component, a compound represented by the following formula (c4) is preferred.

[0053] R C41 -(A) p -N(-R C42 )(-R C43 )→O ···(c4)

[0054] In formula (c4), R C41 A is a linear or branched alkyl group having 8 to 18 carbon atoms, or an alkenyl group having 8 to 18 carbon atoms, and A is -C=O(-NH-R C44 )- represents R C44 is an alkylene group having 1 to 4 carbon atoms, p is an integer of 0 or 1, and R C42 and R C43 Each of these is independently an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms.

[0055] R in equation (c4) C41 The number of carbon atoms is preferably 10 to 14, and more preferably 11 to 14. C41 Preferably, it is an alkyl group derived from oil and fat raw materials. p is preferably 0. R C42 and R C43 Each of these is preferably an alkyl group having 1 to 3 carbon atoms, or a hydroxyalkyl group having 1 to 3 carbon atoms, more preferably an alkyl group having 1 to 3 carbon atoms, and even more preferably a methyl group, R C42 and R C43 It is particularly preferable that all of them are methyl groups. Among these, lauryldimethylamine oxide and lauric acid amidopropyldimethylamine oxide are more preferred, and lauryldimethylamine oxide is even more preferred.

[0056] (C) Component may be a commercially available product or one manufactured by a known manufacturing method. For example, commercially available 2-ethylhexyl alcohol ethoxylate products include Newcol 1008 manufactured by Nippon Emulsifier Co., Ltd. Commercially available 2-propylheptyl alcohol ethoxylate products include Lutensol XP-100, Lutensol XP-80, and Lutensol XP-50 manufactured by BASF. (C) A method for producing component (C) is to add 1 to 20 moles of alkylene oxide to a Garbet alcohol having 8 to 18 carbon atoms. The Garbet alcohol may be one produced by subjecting the aforementioned raw material alcohol to the Garbet reaction, or a commercially available product may be used. For example, 2-propylheptyl alcohol can be obtained by subjecting pentanol to the Garbet reaction. (C2) Component may be used alone or in combination of two or more types.

[0057] The content of component (C) is preferably 0.18 to 9% by mass, and more preferably 0.25 to 4% by mass, relative to the total mass of the liquid detergent composition. If the content of component (C) is within the above range, the cleaning power can be enhanced and the effect of removing protein, oil, and sebum stains from the object to be cleaned can be improved.

[0058] In a liquid detergent composition, the mass ratio of component (C) to component (A), expressed as component (C) / component (A) (hereinafter also referred to as the "C / A ratio"), is preferably 0.05 to 20, more preferably 0.18 to 9, and even more preferably 0.23 to 4.4. If the C / A ratio is within the above range, high cleaning power and high-temperature stability are enhanced.

[0059] <(D) component> (D) Component is elemental silver or a silver-containing compound. Including component (D) can improve the disinfecting power. Examples of silver-containing compounds include silver salts, silver complexes, and their carriers.

[0060] Silver salts are compounds in which silver ions and counterions form an ionic bond, and those exhibiting water solubility are preferred. In this specification, "water solubility" means a solubility of 1 g / 100 mL or more in water at 20°C. Examples of silver salts include silver oxide, silver chloride, silver nitrate, silver sulfate, silver carbonate, silver sulfonate salts, and inorganic silver salts.

[0061] Silver complexes are compounds formed by the complexation of silver ions with a coordinating compound, and those exhibiting water solubility are preferred. The coordinating compound is not particularly limited as long as it forms a coordinate bond with the silver ion to form a complex compound, and the complex compound can be concentrated and maintain water solubility even in water. Examples of such coordinating compounds include amino acids, mono- or dicarboxylic acids, and nitrogen atom-containing cyclic compounds. Preferred amino acids include nitrogen-containing amino acids such as histidine and arginine. In such amino acids, the lone pair of electrons or carboxyl group (or carboxylate anion) on the nitrogen atom coordinates with the silver ion to form a silver complex. Monocarboxylic acids are compounds containing one or two carboxyl groups. Examples of monocarboxylic acids include compounds comprising a monovalent aliphatic hydrocarbon group having 1 to 12 carbon atoms, a substituted or unsubstituted monovalent aromatic hydrocarbon group having 6 to 18 carbon atoms, or a substituted or unsubstituted monovalent aromatic heterocyclic group having 2 to 18 carbon atoms, and one carboxyl group. A divalent group such as an oxygen atom, -NH-, -(C=O)O-, or -(C=O)NH- may be included between the one carboxyl group and the monovalent aliphatic hydrocarbon group having 1 to 12 carbon atoms. Examples of dicarboxylic acids include compounds comprising two carboxyl groups and a divalent aliphatic hydrocarbon group having 1 to 12 carbon atoms, a substituted or unsubstituted divalent aromatic hydrocarbon group having 6 to 18 carbon atoms, or a substituted or unsubstituted divalent aromatic heterocyclic group having 2 to 18 carbon atoms linking these carboxyl groups. Examples of nitrogen atom-containing cyclic compounds include cyclic compounds that contain a nitrogen atom in the ring. These cyclic compounds may be aromatic or aliphatic, and may be monocyclic or fused rings. Preferred examples of such nitrogen atom-containing cyclic compounds include imidazole derivatives, imidazolinone derivatives, or imidazolon derivatives. Examples of silver complexes include complexes of silver with amino acids (histidine, arginine, creatinine, etc.), complexes of silver with carboxylic acids (pyruvic acid, glycolic acid, acetic acid, butyric acid, salicylic acid, etc.), complexes of silver with carboxylic acids and amino acids, and complexes of silver with imidazole derivatives (imidazoline, etc.). It is preferable to use one or more of these.

[0062] Examples of these supports include those in which elemental silver, silver salts, or silver complexes are supported on materials such as zeolites, silica gel, low-molecular-weight glass, calcium phosphate, silicates, and titanium dioxide (hereinafter sometimes referred to as carriers). (D) Component is preferably a water-soluble silver compound, more preferably silver complexed with at least one selected from carboxylic acids and amino acids, and even more preferably a complex of silver, carboxylic acid and creatinine. (D) Component may be used alone or in combination of two or more types.

[0063] The content of component (D) is preferably 1 to 15 ppm, and more preferably 5 to 10 ppm, when converted to a silver element concentration relative to the total mass of the liquid detergent composition. If the content of component (D) is above the lower limit, the disinfecting power is enhanced. If the content of component (D) is below the upper limit, the precipitation of undissolved component (D) is prevented, thereby improving high-temperature stability. In this specification, the "silver element concentration" can be calculated from the amount of silver element contained in component (D) and the amount of component (D) blended.

[0064] <Optional ingredients> The liquid detergent composition may contain other components (optional components) besides components (A) to (D). Any optional component can be used in a liquid detergent composition. Examples include surfactants other than component (C) (hereinafter also referred to as "optional surfactants"), enzymes, preservatives, inorganic builders, hydrotropes, polymer compounds, pH adjusters, solvents, fragrances, dyes, thickeners, disinfectants, antibacterial agents, antioxidants, etc.

[0065] Examples of optional surfactants include cationic surfactants. Examples of cationic surfactants include didecyldimethylammonium chloride, didecyldimethylammonium methosulfate, dimethyldistearylammonium chloride, dimethyldioctylammonium chloride, di(2-hydroxyethyl)distearylammonium chloride, ditallow alkyldimethylammonium chloride, dimethyldi(2-stearoyloxyethyl)ammonium chloride, di(2-oleoyloxyethyl)dimethylammonium chloride, dimethyldi(2-palmitoyloxyethyl)ammonium methosulfate, dimethyldi(3-stearoyloxyisopropyl)ammonium chloride, dimethyldi(2-oleoyloxyisopropyl)ammonium chloride, dimethyldi(4-oleoyloxybutyl)ammonium chloride, N-(2-hydroxyethyl)-N-methyl-N,N-di(2-stearoyloxyethyl)ammonium methosulfate, and N-methyl-N,N,N-tri(2-stearoyloxyethyl)methosulfate. The number of carbon atoms in the "tallow alkyl" group is 14 to 18. Cationic surfactants may be used individually or in combination of two or more types.

[0066] The content of optional surfactants is preferably 3% by mass or less, more preferably 1% by mass or less, and even more preferably substantially absent, based on the total mass of the liquid detergent composition. "Substantially absent" means less than 0.1% by mass based on the total mass of the liquid detergent composition.

[0067] The total amount of all surfactants contained in the liquid detergent composition (hereinafter also referred to as "total surfactant amount") is preferably 0.3 to 10% by mass, and more preferably 0.5 to 5% by mass, relative to the total mass of the liquid detergent composition. If the total surfactant amount is above the lower limit, the liquid detergent composition can obtain sufficient cleaning power. If the total surfactant amount is below the upper limit, sufficient cleaning power and high-temperature stability can be enhanced.

[0068] By containing enzymes, the liquid detergent composition enhances its cleaning power against complex stains including protein, oil, and sebum, suppresses the adhesion and accumulation of dirt on the object being cleaned, and shortens the cleaning time (the time required to remove dirt).

[0069] Examples of enzymes include amylase, protease, mannanase, cellulase, and lipase. Among these, protease and lipase are preferred from the viewpoint of suppressing the adhesion and accumulation of protein, oil, and sebum stains on the object being cleaned, and a combination of protease and lipase is even more preferred because they contribute to both protein, oil, and sebum stains. Enzymes may be used individually or in combination of two or more.

[0070] The enzyme content is preferably 720 to 3000 ppm by mass, more preferably 850 to 2400 ppm by mass, and even more preferably 1110 to 1650 ppm by mass, based on the protein content relative to the total mass of the liquid detergent composition. If the enzyme content is above the lower limit, the cleaning power against complex stains including protein, oil, and sebum stains can be enhanced, the adhesion and accumulation of stains on the object to be cleaned can be suppressed, and the cleaning time can be shortened. If the enzyme content is below the upper limit, since no more enzymes are added than necessary, manufacturing costs can be reduced, and component (B) is consumed in the chelation of metal ions that contribute to the stabilization of the enzyme, preventing the enzyme from degrading and settling, and preventing a decrease in cleaning power due to component (B) being unable to chelate metal ions in tap water.

[0071] ≪Method for quantifying enzymes (protein equivalent)≫ Using the Bio-Rad DC Protein Assay Kit, ovalbumin (the protein that forms egg white) is used as the standard protein. The buffer is 0.1N NaOH. Prepare solution A' by adding 20 μL of reagent S (surfactant solution) to 1 mL of reagent A (alkaline copper tartaric acid). Weigh 200 μL of the liquid detergent composition into a 2.0 mL microtube. Add 100 μL of solution A' and 800 μL of reagent B (forin reagent diluent) and mix well. After standing at room temperature, measure the absorbance at a measurement wavelength of 750 nm within 1 hour (1 cm quartz cell, slit width 0.5 mm). Perform the same procedure for ovalbumin solutions of known concentration and create a calibration curve. Use the absorbance of the measured samples to determine the protein amount from the calibration curve, and use this as the protein equivalent value of the enzyme. Furthermore, determine the concentration in the liquid detergent composition from the following formula. Protein equivalent value (mass %) = Protein amount (g) / 2.0 × 100

[0072] The enzyme content (preparation content) of the enzyme preparation is preferably 0 to 1% by mass, more preferably 0.1 to 0.7% by mass, and even more preferably 0.2 to 0.5% by mass, relative to the total mass of the liquid detergent composition. If the enzyme preparation content is above the lower limit, the cleaning power against complex stains including protein, oil, and sebum stains can be enhanced, the adhesion and accumulation of stains on the object to be cleaned can be suppressed, and the cleaning time can be shortened. If the enzyme preparation content is below the upper limit, since no more enzyme than necessary is added, manufacturing costs can be reduced, and component (B) is consumed in the chelation of metal ions that contribute to the stabilization of the enzyme, preventing the enzyme from degrading and settling, and preventing a decrease in cleaning power due to component (B) being unable to chelate metal ions in tap water.

[0073] If the enzyme contains amylase, the amount of amylase is preferably such that the amylase activity, as measured by the measurement method described later, is 0.44 to 1.25 U, and more preferably 0.63 to 1.00 U. If the amylase activity is above the lower limit, the cleaning power against complex stains including starch stains and protein, oil, and sebum stains can be enhanced, the adhesion and accumulation of stains on the object to be cleaned can be suppressed, and the cleaning time can be shortened. If the amylase activity is below the upper limit, the amount of enzyme added does not need to be increased, thus reducing manufacturing costs. Furthermore, component (B) is consumed in the chelation of metal ions that contribute to the stabilization of the enzyme, preventing the enzyme from degrading and settling, and preventing a decrease in cleaning power due to component (B) being unable to chelate metal ions in tap water.

[0074] If the enzyme contains a protease, the amount of protease is preferably such that the protease activity, as measured by the measurement method described later, is 0.18 to 0.45 U, and more preferably 0.24 to 0.37 U. If the protease activity is above the lower limit, the cleaning power against protein stains and complex stains including protein, oil, and sebum stains can be enhanced, the adhesion and accumulation of stains on the object to be cleaned can be suppressed, and the cleaning time can be shortened. If the protease activity is below the upper limit, the enzyme does not need to be added in excess, thus reducing manufacturing costs. Furthermore, component (B) is consumed in the chelation of metal ions that contribute to the stabilization of the enzyme, preventing the enzyme from denature and settling, and preventing a decrease in cleaning power due to component (B) being unable to chelate metal ions in tap water.

[0075] If the enzyme contains lipase, the amount of lipase is preferably such that the lipase activity, as measured by the measurement method described later, is 0.2 to 0.6 U, and more preferably 0.25 to 0.55 U. If the lipase activity is above the lower limit, the cleaning power against oil stains can be further enhanced, the adhesion and accumulation of dirt on the object to be cleaned can be suppressed, and the cleaning time can be shortened. If the lipase activity is below the upper limit, the amount of enzyme added does not need to be increased, thus reducing manufacturing costs. Furthermore, component (B) is consumed in the chelation of metal ions that contribute to the stabilization of the enzyme, preventing the enzyme from degrading and settling, and preventing a decrease in cleaning power due to component (B) being unable to chelate metal ions in tap water.

[0076] If the enzyme contains mannanase, the amount of mannanase is preferably such that the mannanase activity, as measured by the measurement method described later, is 0.35 to 1.1 U, and more preferably 0.45 to 0.80 U. If the mannanase activity is above the lower limit, the cleaning power against complex stains including polysaccharides other than starch, proteins, oils, and sebum stains can be further enhanced, the adhesion and accumulation of stains on the object to be cleaned can be suppressed, and the cleaning time can be shortened. If the mannanase activity is below the upper limit, since no more enzyme is added than necessary, manufacturing costs can be reduced, and component (B) is consumed in the chelation of metal ions that contribute to the stabilization of the enzyme, preventing the enzyme from degrading and settling, and preventing a decrease in cleaning power due to component (B) being unable to chelate metal ions in tap water.

[0077] (Measurement method) <Amylase activity> Amylase activity can be measured using the following method. The Phadebas tablet (manufactured by Magle, Phadebas Amylase Test for amylase activity measurement), which is a cross-linked starch polymer containing an insoluble blue pigment, is hydrolyzed with alpha-amylase, and the absorbance (620 nm) of the water-soluble blue pigment is measured to determine the alpha-amylase activity. 20.0 g of sodium sulfite (manufactured by Junsei Chemical Co., Ltd., reagent grade, etc.), 6.15 g of potassium dihydrogen phosphate (manufactured by Hayashi Pure Chemical Industries, Ltd., special grade, etc.), 10.86 g of disodium hydrogen phosphate dodecahydrate (manufactured by Kanto Chemical Co., Ltd., special grade, etc.), 0.015 g of calcium chloride dihydrate (manufactured by Kanto Chemical Co., Ltd., first grade, etc.), and 0.75 mL of Brij 35 (manufactured by MERCK, 30% aqueous solution) are accurately weighed, dissolved in deionized water, and diluted to 1000 mL to obtain a buffer solution. 0.5 g of the liquid detergent composition as a sample is accurately weighed, dissolved in the above buffer solution, and diluted to 100 mL to obtain the sample solution. For each sample, two glass test tubes (18 mm × 180 mm) are prepared, one for the sample (A) and the other for the blank (B). 1 mL of the sample solution is placed only in test tube A. Add 5.0 mL of buffer solution, preheated to 37°C, to both test tubes, then add one Fadebath tablet, mix with a flash mixer for 10 seconds, and then place the test tubes in a 37°C water bath. Repeat this procedure at 30-second intervals. Exactly 15 minutes later, add 1.0 mL of 1 mol / L-NaOH solution to both test tubes, mix with a flash mixer for 10 seconds, let stand at room temperature for 15 minutes, and then immediately filter through filter paper. If turbidity is present, filter again using a filtration kit. Measure the absorbance of the filtrates of sample (A) and blank (B) (a liquid detergent composition with the enzyme replaced by water) obtained from the above procedure at a measurement wavelength λ=620 nm (1 cm quartz cell, slit width 0.5 mm). Calculate the enzyme activity value of amylase using the following formula. Enzyme activity value (U) = (Absorbance of sample) - (Absorbance of blank)

[0078] <Protease activity> Protease activity can be measured using the following method. Milk casein is treated with an enzyme, and the undegraded protein is precipitated by adding trichloroacetic acid (TCA), followed by filtration. By measuring the absorbance (λ=275nm) of this filtrate, the amount of amino acids containing a phenyl group (e.g., tyrosine) eluted is determined, and the protease activity is calculated. Accurately place 1.2 g of milk casein (CALBIOCHEM) into a 200 mL beaker and quickly knead it with a glass rod while gradually adding 6 mL of 1 mol / L NaOH to swell it. Next, add 160 mL of 0.05 mol / L boric acid solution and stir with a stirrer to disperse. Adjust the pH to 10.5 with 1 mol / L NaOH and then to a final volume of 200 mL. Accurately weigh 1 g of liquid detergent composition, dissolve it in deionized water, and to a final volume of 100 mL to prepare the sample solution. For each sample, prepare two glass test tubes (18 mm × 180 mm), one for the sample (A) and the other for the blank (B). Add 1 mL of the sample solution to both test tubes. Add 5.0 mL of casein solution, which has been preheated to 37°C, to only test tube A of the sample, stir with a flash mixer for 10 seconds, and then place both test tubes in a 37°C water bath. Repeat this procedure at 30-second intervals. Exactly 30 minutes later, add 5.0 mL of 0.44 mol / L TCA solution to both test tubes, mix with a flash mixer for 10 seconds, leave in a water bath for 30 minutes, and immediately filter through filter paper. Then filter through a filtration filter (Tomsic, NP-44525-ACF). The absorbance of the filtrates of sample (A) and blank (B) (composition without casein) obtained by the above procedure was measured at a measurement wavelength λ=275nm (1cm quartz cell, slit width 0.5mm). The enzyme activity value of the protease was calculated using the following formula. Enzyme activity value (U) = (Absorbance of sample) - (Absorbance of blank)

[0079] <Lipase activity> Lipase activity can be measured using the following method. The measurement is performed using Lipase Kit S (Sumitomo Bakelite Co., Ltd., product number: BS-92101). The substrate (BALB, dimercaprol tributyrate), SDS (sodium dodecyl sulfate), and esterase inhibitor (PMSF, phenylmethylsulfonyl fluoride) are added to a liquid washing agent composition as a sample. PMSF and SDS inactivate esterases other than lipase in the sample, while SDS activates the lipase in the sample. The activated lipase hydrolyzes BALB to produce dimercaprol (BAL). The resulting BAL quantitatively reacts with DTNB (5,5'-dithiobis(2-nitrobenzoic acid)) to produce a yellow 2-nitro-5-thiobenzoic acid (TNB) anion. The reaction of the lipase is stopped by adding a reaction stop solution. The lipase activity is calculated by measuring the absorbance (λ=412nm). Add 2.4 mL of buffer solution, which is a 15% by mass aqueous solution of 2-amino-2-hydroxymethyl-1,3-propanediol, to a container containing the color developer (DTNB) to completely dissolve the color developer, and then add 22 mL of purified water to prepare the color developer stock solution. Next, transfer the entire volume to a 500 mL graduated cylinder, mix 1 volume of the color developer stock solution with 1 volume of the buffer solution, and then add 8 volumes of purified water to prepare the color developer solution. The reaction stop solution solidifies when stored in a cool place, so it is melted by heating (30°C, 5-10 minutes). Then, the entire volume is poured into a 500 mL graduated cylinder while washing with purified water, and the final volume is adjusted to 500 mL with purified water to prepare the reaction stop solution, which is then transferred to an Erlenmeyer flask. For each sample, prepare two glass test tubes: one for the sample (A) and the other for the blank (B). Add 1 mL of the color-developing solution and 50 μL of the sample to both test tubes and mix. Then add 20 μL of esterase inhibitor solution with a concentration of 0.1–1% by mass. After mixing, place both test tubes in a thermostat and incubate at 30±1°C for 5 minutes. After 5 minutes, while still in the thermostat, add 100 μL of substrate solution with a concentration of 0.1–1% by mass to test tube A only, mix, and immediately incubate at 30±1°C. After incubation is complete, while still in the thermostat, immediately add 2 mL of reaction stop solution to both test tubes. Remove both test tubes from the thermostat and mix. Then add 100 μL of substrate solution to test tube B only and mix again. The absorbance of the sample (A) and blank (B) (unreacted enzyme composition) was measured at a wavelength of 412 nm using purified water as a control (1 cm quartz cell, slit width 0.5 mm). The enzyme activity value of lipase was calculated using the following formula. Enzyme activity value (U) = (Absorbance of sample) - (Absorbance of blank)

[0080] <Mannanase activity> The mannanase activity is measured using the following method. By reacting a polysaccharide (galactomannan) with an enzyme (mannanase) in liquid detergent, and by using a p-hydroxybenzhydrazide (PAHBAH) chromogenic reagent to color the reducing end of galactomenan, the degree of galactomannan degradation is detected by measuring the absorbance (λ=275nm), and the mannanase activity is calculated. Dissolve 0.15 g of galactomannan (Megazyme) in 100 mL of deionized water and stir in a 50°C water bath until clear and homogeneous. After stirring, allow to stand in a 50°C water bath. Dissolve 46.85 g of anhydrous disodium hydrogen phosphate (special grade reagent, Kanto Chemical Co., Ltd.) and 9.4 g of sodium dihydrogen phosphate dihydrate (special grade reagent, Kanto Chemical Co., Ltd.) in 1000 mL of deionized water. For the PAHBAH colorimetric reagent, dissolve 0.552 g of Bismuth(3)acetate, 99% (Alfa Aesar, etc.), 2 g of p-hydroxybenzhydrazide (Wako Pure Chemical Industries, Ltd., etc.), and 5 g of (+)-potassium sodium tartrate tetrahydrate (special grade reagent, Junsei Chemical Co., Ltd., etc.) in 0.5 mol / L-NaOH to a total volume of 100 mL. Cover the entire mixture with aluminum foil to protect it from light and stir until the reagent dissolves. Weigh 0.07 g of the liquid detergent composition accurately, dissolve it in phosphate buffer (concentration 0.4 mol / L), and dilute to 100 mL to prepare the sample solution. For each sample, prepare two glass test tubes (18 mm × 180 mm), one for the sample (A) and the other for the blank (B). Add 2 mL of the sample solution and 5 mL of the galacton mannan substrate solution to each test tube. Add 2 mL of the liquid detergent composition as the sample to test tube A only, stir with a flash mixer for 10 seconds, and place in a 50°C water bath. Repeat this procedure at 30-second intervals. Dissolve 0.552 g of Bismuth(III)acetate, 99% (e.g., Alfa Aesar), 2 g of p-hydroxybenzhydrazide (e.g., Wako Pure Chemical Industries), and 5 g of (+)-potassium sodium tartrate tetrahydrate (special grade reagent, e.g., Junsei Chemicals) in 0.5 mol / L NaOH in a total volume of 100 mL. Cover the entire mixture with aluminum foil and stir until the reagents dissolve, protecting it from light, to prepare the PAHBAH color reagent. (Note that this reagent should not be stored for more than one day, but prepared and used daily.) Exactly 30 minutes later (using a stopwatch), add 4 mL of the PAHBAH color reagent, stir with a flash mixer for 10 seconds, and leave on ice for 10 minutes. At the same time, add 4 mL of the PAHBAH color reagent to the blank (composition without liquid detergent composition) and stir with a flash mixer for 10 seconds to inactivate the enzyme.Next, add 5 mL of a 0.15% by mass galactomannan substrate solution, mix again with a flash mixer for 10 seconds, and then let stand on ice for 10 minutes. Then proceed to the color development procedure. Place each test tube containing the PAHBAH reagent into a 70°C water bath at 10-second intervals, remove after exactly 10 minutes, and let stand in an ice bath. Then immediately filter through filter paper. The absorbance of the filtrates of sample (A) and blank (B) (composition without liquid detergent composition) obtained by the above procedure is measured using a spectrophotometer at a measurement wavelength λ=405nm (1cm quartz cell, slit width 0.5mm). The enzyme activity value of mannanase is calculated using the following formula. Enzyme activity value (U) = (Absorbance of sample) - (Absorbance of blank)

[0081] The presence of a preservative in the liquid detergent composition suppresses the growth of microorganisms even if they become contaminated with the liquid detergent composition. Examples of preservatives include isothiazoline compounds, specifically benzisothiazolinone (1,2-benzisothiazolinone-3-one), methylisothiazolinone (2-methyl-4-isothiazolinone-3-one), butylbenzisothiazolinone, chloromethylisothiazolinone, octylisothiazolinone, and dichlorooctylisothiazolinone. Preservatives may be used individually or in combination of two or more types.

[0082] The preservative content is preferably 0.0002 to 0.01% by mass (2 to 100 ppm by mass) relative to the total mass of the liquid detergent composition, and more preferably 0.0005 to 0.004% by mass (5 to 40 ppm by mass). If the preservative content is within the above range, the beneficial effects of the preservative can be obtained without reducing the cleaning power of the liquid detergent composition.

[0083] Examples of inorganic builders include metal oxides. Examples of metal oxides include zinc oxide and magnesium oxide. Inorganic builders may be used individually or in combination of two or more types. If the liquid detergent composition contains an inorganic builder, the inorganic builder content is preferably 0.01 to 5% by mass relative to the total mass of the liquid detergent composition.

[0084] The inclusion of a hydrotrope agent in the liquid detergent composition improves its high-temperature stability (especially its low-temperature stability), making it easier to ensure a more stable transparent appearance. Examples of hydrotropes include aromatic sulfonic acids having 6 to 9 carbon atoms or their salts, aromatic carboxylic acids having 7 to 10 carbon atoms or their salts.

[0085] Examples of aromatic sulfonic acids having 6 to 9 carbon atoms or their salts include xylene sulfonic acid or its salts, such as o-xylene sulfonic acid and m-xylene sulfonic acid; toluene sulfonic acid or its salts, such as o-toluene sulfonic acid, m-toluene sulfonic acid, and p-toluene sulfonic acid; cumene sulfonic acid or its salts, such as m-cumene sulfonic acid and p-cumene sulfonic acid; and mesitylene sulfonic acid or its salts. Examples of aromatic carboxylic acids having 7 to 10 carbon atoms or their salts include benzoic acid or its salts, salicylic acid or its salts, phthalic acid or its salts, isophthalic acid or its salts, terephthalic acid or its salts, methyl p-oxybenzoate, ethyl p-oxybenzoate, and the like. Examples of salt forms of aromatic sulfonic acids and aromatic carboxylic acids include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as magnesium salts and calcium salts; and alkanol ammonium salts such as monoethanolammonium salt, diethanolammonium salt, and triethanolammonium salt. Among these, alkali metal salts are preferred, sodium salts and potassium salts are more preferred, and sodium salts are even more preferred. Hydrotropes may be used individually or in combination of two or more types.

[0086] The hydrotrope content is preferably 2 to 30% by mass, and more preferably 3 to 10% by mass, relative to the total mass of the liquid detergent composition. Within this range, sufficient liquid stabilization can be achieved without reducing the cleaning power of the liquid detergent composition.

[0087] Examples of polymer compounds include polysaccharide polymer compounds such as carboxymethylcellulose (CMC). Alternatively, water-soluble polymers described in Japanese Patent Publication No. 2009-16622 (e.g., alkylene oxide adducts of polyalkyleneamines), polyester soil-release polymers described in International Publication No. 2012 / 136427, and cleaning builders described in Japanese Patent Publication No. 2017-210748 (e.g., sodium salt copolymer of olefin and maleic acid) may be used as polymer compounds. Polymer compounds may be used individually or in combination of two or more types. The polymer compound is preferably present in an amount of 0.001 to 5% by mass, and more preferably 0.01 to 1% by mass, relative to the total mass of the liquid detergent composition.

[0088] Examples of pH adjusting agents include inorganic alkaline agents, organic alkaline agents, and inorganic acids. Examples of inorganic alkaline agents include sodium hydroxide, potassium hydroxide, sodium carbonate, and calcium carbonate. Examples of organic alkaline agents other than component (A) include amine compounds such as monoethanolamine, diethanolamine, triethanolamine, N-(2-aminoethyl)ethanolamine, diethylenetriamine, morpholine, and N-ethylmorpholine. Examples of inorganic acids include hydrochloric acid and sulfuric acid. Examples of organic acids include acetic acid. pH adjusters may be used individually or in combination of two or more types.

[0089] Examples of solvents include water and organic solvents other than hydrotropes (hereinafter also referred to as "other organic solvents"). Among these, water is preferred as the solvent. Using water as the solvent makes it easier to prepare the liquid detergent composition. In addition, when cleaning objects with the liquid detergent composition, the solubility in water is improved. The solvent may be used alone or in combination of two or more types.

[0090] For the water used, deionized water, distilled water, tap water, etc., can be used. The water content is preferably 99% by mass or less, more preferably 40-95% by mass, and even more preferably 70-95% by mass, relative to the total mass of the liquid detergent composition. If the water content is above the lower limit, gelation of the liquid detergent composition is suppressed and the uniformity of the liquid is improved. If the water content is below the upper limit, the high-temperature stability of the liquid detergent composition can be improved.

[0091] Other organic solvents include, for example, alcohols such as ethanol, glycerin, 1-propanol, 2-propanol, 1-butanol, and 3-methoxy-3-methyl-1-butanol (Solfit, trade name); glycols such as ethylene glycol, propylene glycol (PG), butylene glycol, and hexylene glycol; polyglycols such as diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol with a molecular weight of approximately 200 to 1000, and dipropylene glycol; and alkyl ethers such as diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether (butyl carbitol), and diethylene glycol dimethyl ether. The content of other organic solvents is preferably 0.01 to 10% by mass, and more preferably 0.1 to 5% by mass, relative to the total mass of the liquid detergent composition.

[0092] As for the fragrance, those commonly used in liquid detergents can be applied. Examples of fragrances include the blended fragrance compositions 1 to 4 described in Tables 1 to 8 of Japanese Patent Publication No. 2020-132680. Fragrances may be used individually or in combination of two or more. The fragrance content is preferably 0.001 to 0.3% by mass, and more preferably 0.002 to 0.2% by mass, relative to the total mass of the liquid detergent composition.

[0093] The pigments are not particularly limited and include, for example, pigments listed in the "Handbook of Legal Pigments" (Japan Cosmetic Industry Association) or those in which water-soluble polymers, etc., are chemically modified at the ends of the chromophore structure. The pigments may be used individually or in combination of two or more types. The pigment content is preferably 0.00001 to 0.01% by mass, and more preferably 0.0001 to 0.001% by mass, relative to the total mass of the liquid detergent composition.

[0094] The thickening agent is not particularly limited and examples include xanthan gum (manufactured by Sansho Co., Ltd., product name "KELZAN T"), dieutan gum (manufactured by Sansho Co., Ltd., product name "KELCO-VIS DG"), and cellulose nanofiber (manufactured by Mori Machinery Co., Ltd., product name "C-100"). The thickening agent may be used alone or in combination of two or more types. The amount of thickener is preferably 0.001 to 1% by mass, and more preferably 0.01 to 0.5% by mass, relative to the total mass of the liquid detergent composition.

[0095] Examples of disinfectants include zinc sulfate, zinc chloride, and zinc oxide. Disinfectants may be used individually or in combination of two or more types. The disinfectant content is preferably 0.001 to 5% by mass, and more preferably 0.01 to 1% by mass, relative to the total mass of the liquid cleaning agent composition.

[0096] Examples of antibacterial agents include diphenyl ether antibacterial agents such as diclosan (4,4'-dichloro-2-hydroxydiphenyl ether) and triclosan (5-chloro-2-(2,4-dichlorophenoxy)phenol), cationic bactericides such as quaternary ammonium salts (benzalkonium chloride, alkyltrimethylammonium salt, dialkyldimethylammonium salt, alkylbenzyldimethylammonium salt, alkylpyridinium salt), bis-(2-pyridylthio-1-oxide)zinc, polyhexamethylene biguanidine hydrochloride, 8-oxyquinoline, and polylysine. Antimicrobial agents may be used individually or in combination of two or more types. The antibacterial agent content is preferably 0.001 to 5% by mass, and more preferably 0.01 to 1% by mass, relative to the total mass of the liquid detergent composition.

[0097] Examples of antioxidants include monophenol antioxidants such as dibutylhydroxytoluene and butylhydroxyanisole; bisphenol antioxidants such as 2,2'-methylenebis(4-methyl-6-t-butylphenol); and high molecular weight phenol antioxidants such as dl-α-tocopherol. Antioxidants may be used individually or in combination of two or more types.

[0098] Furthermore, the total content of all components contained in the liquid detergent composition shall be 100% by mass.

[0099] <ph> The pH of the liquid detergent composition of the present invention at 25°C is 6 to 11, preferably 7 to 11, and more preferably 8 to 10. If the pH is above the lower limit, the amino group of component (A) forms a salt with the carboxyl group of oil stains (fatty acids), making it easier to remove oil stains, and component (B) chelates metal ions in the stains, thereby enhancing the cleaning power. If the pH is below the upper limit, the decrease in high-temperature stability can be suppressed. The pH (25°C) of the liquid detergent composition is the value measured according to the method specified in JIS Z 8802:2011 "Method for Measuring pH". The pH of the liquid detergent composition can be adjusted using the pH adjusting agent described above.

[0100] <Manufacturing method> The liquid detergent composition of the present invention is manufactured by conventionally known manufacturing methods. One method for producing a liquid detergent composition is to add components other than the pH adjuster to a portion of the water used as a solvent, mix them, adjust the pH to a desired level with the pH adjuster as needed, and then add the remaining water. <How to use> The liquid detergent composition of the present invention can be used for textile products, hand washing dishes, dishwashers, and hard surfaces.

[0101] When used for textile products, methods of using the liquid detergent composition include, for example, putting the liquid detergent composition into the liquid detergent composition dispenser of the washing machine and then starting the washing machine; adding the liquid detergent composition to the water together with the items to be washed during washing; immersing the items to be washed in a cleaning solution prepared by dissolving the liquid detergent composition in water beforehand; and applying the liquid detergent composition directly to the items to be washed, leaving it for, for example, 3 minutes to 24 hours, and then performing a normal wash.

[0102] Furthermore, it is preferable to use a washing machine equipped with an automatic detergent dispensing function, which has become practical in recent years. The automatic detergent dispensing function automatically dispenses detergent from a tank containing detergent into the washing tub via a dispensing pipe. A measuring device such as a syringe pump is installed in the middle of the dispensing pipe, allowing a set amount of detergent, depending on the amount of laundry, to be transferred from the tank to the washing tub.

[0103] Using the automatic detergent dispensing function not only eliminates the hassle of measuring, but also prevents liquid detergent from getting on your hands or spilling and staining the washing machine or surrounding area during measurement. Furthermore, because the liquid detergent composition of this embodiment is concentrated, the amount used per wash may be very small, around 10 mL. Such small amounts of liquid detergent composition are difficult to measure accurately with a cap or the like, and the amount of liquid tends to be either insufficient or excessive. Using an automatic detergent dispensing function is preferable because it allows for accurate measurement of even small amounts of liquid detergent composition, making it easier to achieve sufficient cleaning power and avoiding waste due to overuse.

[0104] Furthermore, it is preferable to use an automatic dispenser that can automatically dispense a predetermined amount of liquid. Using an automatic dispenser is also preferable because it allows for accurate measurement of even small amounts of liquid cleaning agent composition, making it easier to achieve sufficient cleaning power and avoiding waste due to overuse. Some automatic dispensers utilize infrared sensors or other technologies to dispense liquids automatically without requiring the user to touch any switches. Using such an automatic dispenser allows users to measure out liquid detergent simply by holding a container in one hand, significantly reducing the burden on the user.

[0105] Furthermore, when using an automatic dispenser, it is preferable to receive the liquid detergent composition dispensed into a flexible container and then place that flexible container directly into the washing machine. This ensures that the entire amount of the dispensed liquid detergent composition is reliably dissolved in the washing solution. Examples of materials for flexible containers that can be directly put into a washing machine include silicone resin, polyvinyl chloride, elastomer, flexible polyester, flexible polypropylene, and polyurethane.

[0106] Examples of items to be washed include clothing, dishcloths, towels, sheets, curtains, and other textile products. The material of the textile products is not particularly limited and may be any of the following: natural fibers such as cotton, silk, and wool, or synthetic fibers such as polyester and polyamide. When using a liquid detergent composition dissolved in water, it is preferable to dilute it, for example, 5 to 5000 times (by volume). The bath ratio (mass of washing solution / mass of items to be washed), which is the amount of water per unit mass of items to be washed, is preferably 5 or higher for drum-type washing machines and 10 or higher for top-loading washing machines. The amount of liquid detergent composition used in the cleaning process is preferably such that the ratio of the mass of the object to be cleaned (amount of cloth) to the mass of the liquid detergent composition is 10 to 500, more preferably 10 to 300, and even more preferably 10 to 100.

[0107] When used in a dishwasher, a method for cleaning objects in a dishwasher using a liquid detergent composition includes a method that includes both washing and rinsing steps. As a washing method, for example, there is a method that includes the steps of: washing the objects to be washed while raising the temperature of a washing solution prepared by introducing tap water at room temperature (preferably around 5 to 30°C) into the dishwasher compartment to a predetermined washing temperature (temperature of the washing solution circulating during washing) (hereinafter referred to as the "washing step"); rinsing the objects to be washed after washing with tap water at room temperature (hereinafter referred to as the "rinsing (1) step"); and further rinsing the objects after the rinsing (1) step while raising the temperature of tap water at room temperature to preferably 70 to 75°C at a rate of 2 to 3°C / minute (hereinafter referred to as the "rinsing (2) step"). The washing time in the washing step is preferably 10 to 40 minutes. In a typical standard cycle, the washing temperature during the washing process is approximately 55-65°C, and the heating rate is approximately 2-3°C / minute. In a low-temperature cycle, for example, the washing temperature is approximately 35-45°C, and the heating rate is approximately 1°C / minute. The liquid detergent composition of the present invention exhibits excellent cleaning power against protein, oil, and sebum stains even in low-temperature washing, and for example, it exhibits excellent cleaning power even at a washing temperature of 35°C. The amount of liquid detergent composition used per wash is preferably 0.5 to 3 g per liter of tap water, regardless of the washing cycle.

[0108] When used for hand-washing dishes, for example, one method involves applying the liquid detergent composition to a cleaning tool, lathering the liquid detergent composition on the cleaning tool, and then scrubbing the items to be cleaned with the lathered cleaning tool. Alternatively, one method involves dissolving the liquid detergent composition in water to make a cleaning solution, and then immersing the items to be cleaned in the cleaning solution while scrubbing them with the cleaning tool. In either method, the object to be cleaned is rinsed with water after scrubbing, and then the water is drained from the object.

[0109] Examples of cleaning tools include single-layer sponges, scrubbing sponges, and mesh sponges.

[0110] Examples of items to be washed include ceramics and metal utensils. Examples of ceramics include tableware such as plates, bowls, and donburi bowls. Examples of metal utensils include tableware such as forks and spoons, and stainless steel sinks.

[0111] When used for hard surfaces, one method of using the liquid cleaning agent is to place it in a dispensing container, apply an appropriate amount of the liquid cleaning agent from the container to the object to be cleaned (e.g., bathtubs and toilets), and then rinse it with running water after a certain period of time. Another method of use involves applying an appropriate amount of liquid cleaning agent to the object to be cleaned (for example, a bathtub and toilet bowl) and then scrubbing it with a cleaning brush. Alternatively, one method of use involves applying the liquid cleaning agent to the object to be cleaned (for example, a toilet seat, floor, and walls) and then wiping it off with a cloth or paper, a method known as "wiping wash."

[0112] A hard surface refers to a surface made of hard materials such as plastics, ceramics, glass, and stainless steel. The objects to be cleaned can be any hard surfaces of articles or other items, such as hard surfaces in bathrooms, bathroom fixtures, hard surfaces in toilets, toilet fixtures, hard surfaces in kitchens, and kitchen fixtures (dishes, cooking utensils, etc.). Because the liquid cleaning agent of this embodiment has good high-temperature stability, it is particularly suitable as a liquid cleaning agent for bathrooms used for cleaning inside bathrooms.

[0113] The liquid detergent composition of the present invention achieves both disinfecting power and cleaning power, which were previously in a trade-off relationship, while also improving high-temperature stability. Although the mechanism is not clear, it is thought to be as follows. Component (A) has a branched chain structure in its hydrophobic portion compared to conventionally used alkanolamines. The bulky structure of the hydrophobic portion of component (A) makes it easily adsorbed to hydrophobic substances such as oil and sebum stains. As it is a basic substance with a primary amino group, the amino group easily forms salts with the carboxyl group of oil stains (fatty acids), increasing the affinity of component (A) to oil stains, making it easier to remove oil stains and resulting in high cleaning power. Furthermore, the amino group of component (A) converts oil stains into amine soap, making them easier to remove from the arrangement of solidified oil stains and loosening their structure, which makes it easier for component (C) to adsorb to the remaining hydrophobic substances (proteins, oils, sebum stains, etc.). In addition, the hydroxyl group of component (A) enhances the solubility of the amine soap, allowing it to function as a cleaning agent, resulting in even higher cleaning power. Furthermore, since it is a basic substance having a primary amino group, the cationized component (A) forms an ionic bond with the anionic component (B), mitigating the effect of the chelating agent. This prevents the decrease in solubility of component (D) and the precipitation of insoluble matter by component (B), thereby suppressing the decrease in high-temperature stability. Component (B) chelates metal ions in the dirt, thereby enhancing the surfactant effect of component (C), and resulting in high cleaning power. Component (C) has a large hydrophobic structure, making it easily adsorbed to hydrophobic substances such as proteins, oils, and sebum stains. It also has a hydrophilic portion, which allows it to take in adsorbed dirt into micelles and disperse them in water, thus exhibiting high cleaning power. Furthermore, in this invention, the sedimentation of silver components (salts or complex salts) derived from component (D) can be suppressed, thus suppressing the decrease in high-temperature stability. The disinfectant activity is obtained from component (D). In particular, if component (D) is water-soluble, precipitation will be less likely to occur, and if the pH is near neutral, the state of existence of component (D) in the composition (structure of component (D) in water (dissolved state)) will not change easily, so it is thought that high-temperature stability can be improved. [Examples]

[0114] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following description. The raw materials used in each example are as follows:

[0115] (Raw materials used) <(A) Ingredient: Alkanolamine> a-1: 2-amino-2-hydroxymethyl-1,3-propanediol (Tris): Manufactured by Sigma-Aldrich Japan LLC, product name "Trizma base", in formula (a-1), X 1 and X 2 It is a hydroxyl group. a-2: 2-amino-2-methyl-1,3-propanediol (AMPD): Fujifilm Wako Pure Chemical Corporation, in formula (a-1), X 1 X is a hydrogen atom, 2 It is a hydroxyl group. a-3: 2-amino-2-methyl-1-propanol (AMP): Kanto Chemical Co., Ltd., in formula (a-1), X 1 and X 2 It is a hydrogen atom. a-4: 2-amino-2-ethyl-1,3-propanediol: Tokyo Chemical Industry Co., Ltd., in formula (a), X 1 X is a hydrogen atom, 2 is a hydroxyl group, R 1 is a methylene group, R 2 is an ethylene group, R 3 It is a methylene group, where l is 1, m is 1, and n is 1. a-5: 2-amino-1-butanol: Tokyo Chemical Industry Co., Ltd., in formula (a), X 1 and X 2 is a hydrogen atom, where l is 1, m is 0, and n is 2. · a-6: 6-amino-1-hexanol: Tokyo Chemical Industry Co., Ltd., in formula (a), X 1 and X 2 is a hydrogen atom, and l is 5, m is 0, and n is 0. a'-7 (Comparative product): Monoethanolamine (MEA): Nippon Shokubai Co., Ltd.

[0116] <(B) component> <(b1) Ingredients: Aminocarboxylic acid chelating agent> b1-1: EDTA, ethylediaminetetraacetate tetrasodium salt: Manufactured by AkzoNobel Corporation, product name "Dissolvin Z". b1-2: MGDA, methylglycine diacetate trisodium salt: manufactured by BASF, product name "Trilon M MAX". b1-3: GLDA, L-glutamic acid diacetate tetrasodium salt: Manufactured by Kirest Co., Ltd., product name "Kirest CMG-40". <(b2) Component: Carboxylic acid polymer compound> b2-1: Acrylic acid / maleic acid copolymer (Mw50,000): Manufactured by BASF, product name "Sokalan CP7". b2-2: Acrylic acid / maleic acid copolymer (Mw70,000): Manufactured by BASF, product name "Sokalan CP5". b2-3: Sodium salt of olefin / maleic acid copolymer 2 (Mw 11,000): Manufactured by Nippon Shokubai Co., Ltd., product name "TL-500". b2-4: Acrylic acid / maleic acid copolymer (Mw20,000): Manufactured by Kao Corporation, product name "Demol EP". b2-5: Sodium polyacrylate (Mw100,000): Manufactured by Nippon Junyaku Co., Ltd., product name "Jurimar AC-10NP". b2-6: Sodium polyacrylate (Mw800,000): Manufactured by Nippon Shokubai Co., Ltd., product name "AS Polymer". <(b3) Ingredients: Hydroxycarboxylic acid chelating agent> b3-1: Malic acid: Manufactured by Fuso Chemical Industry Co., Ltd., product name "Malic Acid 50". b3-2: Citric acid: Manufactured by Fuso Chemical Industry Co., Ltd., product name "Liquid Citric Acid".

[0117] <(C) component> <(c1) Ingredient: Anionic surfactant> · c1-1:: Sodium polyoxyethylene alkyl ether sulfate (1E.O): "BRES(1)" manufactured by Lion Corporation, in formula (c1-1-1), R c11 M is a linear or branched alkyl group having 12 / 14 carbon atoms = 75 / 25 carbon atoms. c11 This is a sodium ion. · c1-2: Sodium α-olefin sulfonate (AOS): "Lipolan LJ-441" manufactured by Lion Specialty Chemicals Co., Ltd., in formula (c1-2), R c11 +R c12 X is a linear alkyl group having 12 to 14 carbon atoms, X is a double bond and a hydroxyalkyl group, and M c11 This is a sodium ion. • c1-3: Sodium laurate: Manufactured by Fujifilm Wako Pure Chemical Corporation, in formula (c1), R c11 A is a linear alkyl group with 11 carbon atoms, X is a single bond, c1 is 0, m is 0, n is 0, and Y is -CO2M c12 And M c12 This is a sodium ion. • c1-4: Sodium monolauryl phosphate: Tokyo Chemical Industry Co., Ltd., in formula (c1), R c11 A is a linear alkyl group with 12 carbon atoms, X is -O-, c1 is 0, m is 0, n is 0, and Y is -PO3M c13 And M c13 This is a sodium ion. <(c2) Ingredient: Nonionic surfactant> • c2-1: Alkyl polyethylene glycol ether (C10EO10): Manufactured by BASF, product name "Lutensol XP100", in formula (c2-1-1), R C23 is an n-pentyl group, R C24 x is an n-propyl group, and x is 10. • c2-2: Alkyl polyethylene glycol ether (C10EO14): Manufactured by BASF, product name "Lutensol XP140", in formula (c2-1-1), R C23 is an n-pentyl group, R C24 is an n-propyl group, and x is 14. • c2-3: Alkyl polyethylene glycol ether (C10EO5): Manufactured by BASF, product name "Lutensol XP50", in formula (c2-1-1), R C23 is an n-pentyl group, R C24 x is an n-propyl group, and x is 5. • c2-4: Alkyl polyethylene glycol ether (C10EO3): Manufactured by BASF, product name "Lutensol XP30", in formula (c2-1-1), R C23 is an n-pentyl group, R C24 x is an n-propyl group, and x is 3. · c2-5: Polyoxyethylene isotridecyl ether (EO60): Manufactured by Lion Chemical Co., Ltd., product name "TA600-75", in formula (c2-1-1), R C23 is an n-pentyl group, R C24 The group is an n-propyl group, and x is 60. <(c3) Ingredient: Amphoteric surfactant> • c3-1: Lauryldimethylaminoacetic acid betaine: Manufactured by Daiichi Kogyo Seiyaku Co., Ltd., product name "Amogen (registered trademark) SH", in formula (c3), R C31 is a linear alkyl group with 12 carbon atoms, p is 0, and R C32 is a methyl group, R c33 R is a methyl group, c34 is a methylene group, R c35 -CO2 - A compound that is • c3-2: Lauryl amidopropyl betaine: Manufactured by Kawaken Fine Chemical Co., Ltd., product name "Softazolin (registered trademark) LBP-R", lauryl amidopropyl betaine, in formula (c3), R C31 A is a linear alkyl group with 11 carbon atoms, and A is -C=O(-NH-R c36 )-, R c36 is a propylene group, p is 1, R C32 is a methyl group, R c33 R is a methyl group, c34 is a methylene group, R c35 -CO2 - A compound that is <(c4) Ingredient: Semipolar surfactant> · c4-1: n-dodecyldimethylamine oxide: manufactured by Lion Specialty Chemicals Co., Ltd., product name "Canadex DM12D-W", N,N-dimethyldodecylamine N-oxide, in formula (c4), R C41 is a linear alkyl group with 12 carbon atoms, p is 0, and R C42 is a methyl group, R C43 It is a compound that has a methyl group. <(c'5) Ingredient (comparative product): Cationic surfactant> • c'5-1 (Comparative product): Dodecyltrimethylammonium chloride: Manufactured by Lion Specialty Chemicals Co., Ltd., "Lipoguard 12-37w".

[0118] <(D) Component: Silver compound> • d-1: Carboxylic acid, silver complexed with creatinine: Manufactured by J Chemical Co., Ltd., product name "AG Alpha CF-01". d-2: Nanocolloid in which silver oxide is supported on colloidal alumina silica: Manufactured by JGC Catalysts & Chemicals Co., Ltd., product name "Atomy Ball UA". ·d-3: Inorganic agent with silver ions supported on zeolite: Manufactured by Sinanen Zeomic Co., Ltd., product name "Zeomic AJ10N".

[0119] <Optional ingredients> • Water-soluble solvent: Diethylene glycol monobutyl ether: Manufactured by Nippon Emulsifier Co., Ltd., product name "Butyl diglycol". • Polylysine: Manufactured by JNC Corporation, product name "Polylysine". • pH adjusters: Sodium hydroxide, hydrochloric acid... Amount required to adjust the pH to the value shown in the table.

[0120] Examples 1-59, Comparative Examples 1-8 The liquid detergent compositions of Examples 1-59 and Comparative Examples 1-8 were prepared by mixing the components shown in Tables 1-17 and adjusting the pH. In the table, the content of component (D) is the amount converted to the concentration of silver element.

[0121] ≪Evaluation Method≫ <High temperature stability> 50g of each evaluation sample was filled into a 50mL glass bottle ("SV-50A" from Nichiden Rika Glass Co., Ltd.), sealed, and stored in a 40°C constant temperature room for 6 months. The condition of the evaluation samples was visually assessed 1 month, 3 months, 4 months, and 6 months after the start of storage. The samples were judged according to the evaluation criteria below, with scores of 5, 4, and 3 being considered passing grades. (Evaluation Criteria) 5 points: No precipitate was observed after 6 months. 4 points: No precipitate was observed after 4 months, but a precipitate was observed after 6 months. 3 points: No precipitate was observed after 3 months, but a precipitate was observed after 4 months. Points 2: No precipitate was observed after 1 month, but a precipitate was observed after 3 months. 1 point: Precipitation was observed after one month.

[0122] <Evaluation of cleaning power> (1) Preparation of model dirt The product was prepared by mixing oil and sebum stain components (a mixture of 45% by mass of oleic acid, 25% by mass of trioleic acid, 19.5% by mass of cholesterol oleate, 2.5% by mass of cholesterol, 4% by mass of squalene, and 4% by mass of liquid paraffin) and protein stain components (keratin calcium) in a mass ratio of 3:1. (2) Creation of a grime plate A test piece (2cm x 10cm) made of fiberglass-reinforced plastic (FRP) was coated with model dirt and allowed to dry. (3) Evaluation of cleaning power The evaluation sample was dropped onto the soiled area of ​​the grime plate, left for 1 minute, and then rinsed with tap water using a quantitative liquid delivery pump. After the test piece was thoroughly dried, the soiled area was visually evaluated according to the evaluation criteria below. A score of 3 or higher was considered a pass. (Evaluation Criteria) 5 points: The stains were completely removed. 4 points: Most of the dirt came off. 3 points: The stains came off quite well. 2 points: Some of the dirt has been removed. 1 point: The stains hardly came off.

[0123] <Evaluation of disinfecting power> For the evaluation sample, 10 μL of the test bacterial solution was spread onto a sterilized stainless steel disc (20 mm in diameter), and allowed to stand until the test bacterial solution was visibly dry. Subsequently, 0.1 mL of the evaluation sample was spread onto the disc and allowed to stand. For the control sample, 0.1 mL of Tween 80 was spread onto a disc that had been spread with 10 μL of the test bacterial solution and allowed to stand, and this was used. After standing for 5 minutes, both stainless steel discs were placed in vials containing 10 mL of inactivator, an appropriate amount of glass beads was added, and the mixture was stirred to prepare the test solutions. A 10-fold dilution series of each test solution was prepared with physiological saline, and the cells were cultured using the pour plate method with NA medium at 37 ± 1 °C for 40 to 48 hours, after which the bacterial count was determined. The log bacterial count of the evaluation sample was calculated by subtracting the log bacterial count of the control sample from the log bacterial count of the evaluation sample, and the results were judged according to the following criteria. ◎ and ○ were considered pass. Evaluation Criteria ◎: The antibacterial activity value was 2.0 or higher. 〇: The antibacterial activity value was 1.5 or more and less than 2.0. ×: The antibacterial activity value was less than 1.5.

[0124]

Table 1

[0125]

Table 2

[0126]

Table 3

[0127]

Table 4

[0128]

Table 5

[0129]

Table 6

[0130]

Table 7

[0131]

Table 8

[0132]

Table 9

[0133]

Table 10

[0134]

Table 11

[0135]

Table 12

[0136]

Table 13

[0137]

Table 14

[0138]

Table 15

[0139]

Table 16

[0140]

Table 17

[0141] As shown in the results of Tables 1 to ⒘, the liquid detergent compositions of Examples 1 to 59 all had good detergency, antibacterial activity, and high-temperature stability. On the other hand, Comparative Example 1 that did not contain component (A) was inferior in detergency. Comparative Example 2 that did not contain component (B) was inferior in detergency. Comparative Example 3 that did not contain component (C) was inferior in detergency. Comparative Example 4 that did not contain component (D) was inferior in antibacterial power. Comparative Example 5 with a pH of 5 was inferior in detergency. Comparative Example 6, with a pH of 12, exhibited poor high-temperature stability. Comparative Example 7, which used monoethanolamine instead of component (A), had inferior cleaning power. Comparative Example 8, which used a cationic surfactant instead of component (C), exhibited inferior cleaning power.< / ph>

Claims

1. (A) Components: an alkanolamine represented by the following formula (a), (B) Ingredients: Chelating agent and (C) Component: A surfactant comprising one or more selected from the group consisting of anionic surfactants (C1), nonionic surfactants (C2), amphoteric surfactants (C3), and semipolar surfactants (C4), (D) Components: Contains a silver compound, A liquid detergent composition having a pH of 6 to 11 at 25°C. 【Chemistry 1】 In formula (a), R １ , R ２ and R ３ Each is independently an alkylene group or a hydroxyalkylene group, l, m and n are independently 0 to 6, where l + m + n is a number of 2 or more, X １ and X ２ Each of these is independently a hydrogen atom or a hydroxyl group, except when l is 1, m and n are both numbers from 1 to 6.

2. The liquid detergent composition according to claim 1, wherein the (B) component comprises one or more selected from the group consisting of an aminocarboxylic acid-based chelating agent (B1), a hydroxycarboxylic acid-based chelating agent (B2), and a carboxylic acid-based polymer compound (B3).

3. The liquid detergent composition according to claim 1 or 2, wherein the content of component (B) is 0.6 to 6% by mass with respect to the total mass of the liquid detergent composition.

4. The liquid detergent composition according to claim 1 or 2, wherein the mass ratio expressed as [mass of component (C)] / [mass of component (A)] is 0.05 to 20.

5. A liquid cleaning agent composition according to claim 1 or 2, for use on hard surfaces.

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