JP7445422B2 - Liquid sterilizing cleaning composition and sterilizing cleaning method - Google Patents

Description

The present invention relates to a liquid sterilizing cleaning composition and a sterilizing cleaning method. Specifically, the present invention provides a liquid sterilizing detergent composition that has excellent sterilizing properties against spores of spore-forming bacteria, excellent cleaning power against oil and fat stains, low corrosiveness against light metals, and excellent storage stability; The present invention relates to a sterilizing cleaning method using the liquid sterilizing cleaning composition.

Disinfectant cleaners are used to reduce the risk of food poisoning and to maintain a good sanitary environment in food factories and kitchen facilities. Disinfectant cleaners containing quaternary ammonium salts as a main ingredient are generally used for disinfecting and cleaning food factories and kitchen facilities. In addition, when the purpose is to sterilize spore-forming bacteria (hereinafter also referred to as spore bacteria) or when high sterilization power is required, chlorine-based oxidizing agents such as sodium hypochlorite are used as the main ingredient. A sterilizing detergent composition is used.

However, sterilizing detergents containing quaternary ammonium salts as a main component have almost no sterilizing power against spore-forming bacteria, and therefore cannot sterilize spore-forming bacteria. Furthermore, the appearance of live bacteria resistant to cationic surfactants may be a problem with quaternary ammonium salts. Disinfecting cleaning agents containing chlorine-based oxidizing agents have a certain degree of sterilizing effect on spore-forming bacteria, but are highly corrosive to light metals, which limits the equipment that can be used with them. Since spore-forming bacteria have high drug resistance, there is a problem in that residual spore-forming bacteria contaminates food, causing food spoilage and food poisoning.

As a conventional sterilizing cleaning agent, Patent Document 1 describes a sterilizing cleaning composition comprising an amphoteric surfactant-based sterilizing agent, an amphoteric surfactant and/or a fatty acid alkanolamide type nonionic surfactant. There is. Patent Document 2 describes a sterilizing, deodorizing, and wiping agent composition comprising an amphoteric surfactant with an isoelectric point of more than 7, an amphoteric surfactant with an isoelectric point of 7 or less, a nonionic surfactant, and silicone oil. There is. Patent Document 3 describes a disinfectant cleaning composition containing a thiazoline preservative, a cationic surfactant, and an amphoteric surfactant and having a pH of 5.0 to 9.0.

Japanese Patent Application Publication No. 2001-316209 Japanese Patent Application Publication No. 2002-047105 Japanese Patent Application Publication No. 2014-076974

However, the sterilizing detergent compositions described in Patent Document 1 and Patent Document 2 have a sterilizing effect on Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, etc., but have almost no sterilizing effect on highly drug-resistant spore-forming bacteria. . The sterilizing detergent composition described in Patent Document 3 is also ineffective against spore-forming bacteria and exhibits sterilizing properties against cationic surfactant-resistant bacteria, but requires long-term contact (several days).

Therefore, it is an object of the present invention to have sterilizing power not only against general bacteria but also against spores of spore-forming bacteria and bacteria resistant to cationic surfactants, and to have excellent cleaning power against oil and fat stains. An object of the present invention is to provide a sterilizing detergent composition having the following properties.

In order to solve the above problems, the present inventors conducted extensive studies and found that the amphoteric surfactant represented by the general formula (1) or its salt as the (A) component , and lauryl amino dipropion as the (B) component. one or more selected from sodium acid, 2-alkyl-N-carboxyethyl-N-hydroxyethylimidazolinium betaine, lauric acid amidopropyl betaine, and lauryldimethylaminoacetic acid betaine; (C) a chelating agent as the component; , found that a liquid sterilizing detergent composition containing water as component (D) and having a pH of 8.0 to 13 at 25°C can solve the problems that conventional sterilizing detergent compositions had. , we have completed the present invention.

That is, the present invention
(1) Component (A) is an amphoteric surfactant represented by the following general formula (1) or its salt; component (B) is sodium lauryl amino dipropionate, 2-alkyl-N-carboxyethyl-N- One or more selected from hydroxyethylimidazolinium betaine, lauric acid amidopropyl betaine, and lauryldimethylaminoacetic acid betaine, a chelating agent as component (C), and water as component (D), at 25°C. A liquid disinfectant cleaning composition having a pH of 8.0 to 13;

(In the formula, R ¹ is an alkyl group having 6 to 18 carbon atoms, R ² is a hydrogen atom or an alkyl group having 6 to 18 carbon atoms; m is an integer of 1 to 4, and n is an integer of 0 to 2.)
(2) The liquid sterilizing detergent composition of (1), wherein the mass ratio (A)/(C) of component (A) and component (C) is 0.005 to 20;
( 3 ) Component (C) is selected from the group consisting of ethylenediaminetetraacetic acid, nitrilotriacetic acid, diethylenetriaminopentaacetic acid, triethylenetetraaminehexaacetic acid, glutamic acid diacetic acid, methylglycine diacetic acid, and salts thereof. The liquid sterilizing detergent composition according to (1) or (2) , which is one or more species;
(4) The liquid sterilization according to (1) to (3) further contains, as component (E), one or more alkyldimethylamine oxides whose alkyl group has 8 to 16 carbon atoms. cleaning composition,
(5) The liquid sterilizing detergent composition according to any one of (1) to (4), further containing one or more anionic surfactants as component (F);
(6) A step of immersing the body to be sterilized in a sterilizing cleaning solution containing the liquid sterilizing cleaning composition according to any one of (1) to (5), and removing the sterilizing cleaning liquid from the body to be sterilized after immersion. A sterilization cleaning method including a step of removing the
(7) A sterilizing cleaning solution containing the liquid sterilizing cleaning composition according to any one of (1) to (5) is foamed to form foam or a mixture of foam and liquid with a specific gravity of 0.05 to 0.9 g/cubic centimeter. This sterilization cleaning method includes the steps of spraying the surface of the object to be sterilized and cleaned, a step of spraying the object to be sterilized and then letting it stand or scrubbing it, and a step of rinsing with water.

The sterilizing detergent composition of the present invention has an excellent sterilizing effect against spores of spore-forming bacteria, fungi, general bacteria, and cationic surfactant-resistant bacteria, and has an excellent sterilizing effect against oils and fats. Has cleaning power.

The present invention provides an amphoteric surfactant represented by the general formula (1) or a salt thereof as the (A) component, a carboxylic acid type amphoteric surfactant other than the (A) component as the (B) component, and a carboxylic acid type amphoteric surfactant other than the (A) component as the (C) component. This is a liquid disinfectant cleaning composition that contains water as a chelating agent and component (D), and has a pH of 7.5 to 13 at 25°C.
Each component will be explained in detail below.

The present invention includes an amphoteric surfactant represented by the following general formula (1) or a salt thereof as component (A). This component (A) contributes to the eradication of spore-forming bacteria and cationic surfactant-resistant bacteria.

(In the formula, R ¹ is an alkyl group having 6 to 18 carbon atoms, R ² is a hydrogen atom or an alkyl group having 6 to 18 carbon atoms; m is an integer of 1 to 4, and n is an integer of 0 to 2.)

R ¹ in general formula (1) is a straight chain or branched alkyl group having 6 to 18 carbon atoms, preferably a straight chain or branched alkyl group having 8 to 16 carbon atoms, and more preferably is a straight chain or branched alkyl group having 8 to 14 carbon atoms. R ² in the general formula (1) is a hydrogen atom or a straight chain or branched alkyl group having 6 to 18 carbon atoms, preferably a hydrogen atom or a straight chain or branched alkyl group having 8 to 14 carbon atoms. It is the basis.

m in general formula (1) is an integer of 1 to 4, preferably m is an integer of 1 or 2. In general formula (1), n is 0, 1 or 2, preferably 0 or 1.

Examples of amphoteric surfactants that can be used as component (A) include dihexyldiaminoethylglycine, dihexylaminoethyl (diaminoethylglycine), dihexyldiaminoethyl (diaminoethylglycine), dioctyldiaminoethylglycine, and dioctyldiaminoethylglycine. dioctyldiaminoethyl (diaminoethylglycine), di(2-ethylhexyl)diaminoethylglycine, di(2-ethylhexyl)aminoethyl (diaminoethylglycine), didecyldiaminoethylglycine, didecylaminoethyl (diaminoethylglycine) ), didecyldiaminoethyl (diaminoethylglycine), decyldiaminoethylglycine, lauryldiaminoethylglycine, octylaminoethylglycine, octyldiaminoethylglycine, alkyl (C12-14) diaminoethylglycine, myristyldiaminoethylglycine and salts thereof etc.

Component (A) of the present invention includes dioctyldiaminoethylglycine, dioctylaminoethyl (diaminoethylglycine), dioctyldiaminoethyl (diaminoethylglycine), octylaminoethylglycine, octyldiaminoethylglycine, lauryldiaminoethylglycine, alkyl (C12 -14) Diaminoethylglycine and salts thereof are preferred, and lauryldiaminoethylglycine, alkyl (C12-14) diaminoethylglycine and salts thereof are more preferred. Also preferred are dioctyldiaminoethylglycine, dioctylaminoethyl (diaminoethylglycine), dioctyldiaminoethyl (diaminoethylglycine), octylaminoethylglycine, and mixtures of octylaminoethylglycine and salts thereof.

Examples of the above-mentioned salts include alkali metal salts such as sodium and potassium salts, alkanolamine salts such as monoethanolamine, monoisopropanolamine, and triethanolamine, and hydrochlorides, among which sodium salts and hydrochlorides are preferred.

The above commercial products include Revon S (manufactured by Sanyo Chemical Industries, Ltd.), Revon 50 (manufactured by Sanyo Chemical Industries, Ltd.), Revon T-2 (manufactured by Sanyo Chemical Industries, Ltd.), Pionin C-156 (manufactured by Takemoto Yushi Co., Ltd.), and Nissan Examples include Anon LG-R (manufactured by NOF Corporation). These may be used alone or in combination of two or more.

The carboxylic acid type amphoteric surfactant other than the component (A), which is the component (B) of the present invention, imparts a sterilizing effect and a cleaning effect to the liquid sterilizing detergent composition of the present invention.
The carboxylic acid type amphoteric surfactant other than component (A) used in the present invention is not particularly limited as long as it exhibits the effects of the present invention. Specific examples include alkyl betaine type amphoteric surfactants, alkylimidazolinium betaine type amphoteric surfactants, and aminopropionic acid type amphoteric surfactants.

Examples of alkylbetaine type amphoteric surfactants include alkylcarbobetaines and alkylsulfobetaines.
Examples of the alkylcarbobetaines include alkylhydroxycarbobetaine, alkylamidecarbobetaine, alkylamidehydroxycarbobetaine, alkyldimethylbetaine, alkyldiethylbetaine, alkylhydroxyethylbetaine, and the like.

Specific examples of alkylcarbobetaines include lauryldimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, stearic acid amidopropyl betaine, oleic acid amidopropyl betaine, and ricinoleic acid amide. Examples include propyl betaine. Among these, lauryl dimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, and lauric acid amidopropyl betaine are preferable, and more preferable than lauryl dimethylaminoacetic acid betaine and lauric acid amidopropyl betaine.

Examples of the alkylsulfobetaines include alkylsulfobetaines, alkylhydroxysulfobetaines, alkylamidosulfobetaines, and alkylamidohydroxysulfobetaines.
Specific examples of alkyl sulfobetaines include lauryl hydroxysulfobetaine, coconut oil fatty acid hydroxysulfobetaine, lauric acid amidopropyl hydroxysulfobetaine, coconut oil fatty acid amidopropyl hydroxysulfobetaine, amidopropyl myristate hydroxysulfobetaine, and amidopropyl erucate. Examples include hydroxysulfobetaine. Among these, laurylhydroxysulfobetaine and lauric acid amidopropylhydroxysulfobetaine are preferred, and laurylhydroxysulfobetaine is more preferred.

Specific examples of alkylimidazolinium betaine type amphoteric surfactants include 2-alkyl-N-carboxyethyl-N-hydroxyethylimidazolinium betaine, N-coco fatty acid acyl-N-carboxymethyl-N-hydroxyethylethylenediamine Examples include sodium.

Examples of the aminopropionic acid type amphoteric surfactants include alkylaminopropionic acids and alkylaminodipropionic acids.
The alkyl groups of alkylaminopropionic acids and alkylaminodipropionic acids include caprylyl group, capryl group, lauryl group, myristyl group, cetyl group, stearyl group, aracyl group, behenyl group, oleyl group, linoleyl group, linolenyl group, etc. Can be mentioned.

The aminopropionic acid type amphoteric surfactant is usually in the form of a salt, preferably an alkali metal salt or an alkanolamine salt.
Here, examples of the alkali metal salts include sodium salts and potassium salts. Examples of the alkanolamine salt include monoethanolamine salt, diethanolamine salt, triethanolamine salt, 2-amino-2-methyl-1-propanol salt, and diisopropanolamine salt.

Specific examples of aminopropionic acid type amphoteric surfactants include sodium laurylaminopropionate, triethanolamine laurylaminopropionate, sodium laurylaminodipropionate, triethanolamine laurylaminodipropionate, and coconut oil fatty acid acyl-N. -Carboxyethyl-N-hydroxyethylethylenediamine sodium, coconut oil fatty acid acyl-N-carboxyethoxyethyl-N-ethylethylenediamine disodium, palm kernel oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine sodium, etc. . Among these, sodium laurylaminopropionate and sodium laurylaminodipropionate are preferred, and sodium laurylaminodipropionate is more preferred.

The chelating agent, which is component (C) of the present invention, improves the ability to eliminate spore-forming bacteria.
Component (C) of the present invention includes ethylenediaminetetraacetic acid, hydroxyethyliminodiacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, methylglycinediacetic acid, glutamic acid diacetic acid, iminodisuccinic acid, and nitrilotriacetic acid. , tripolyphosphoric acid, citric acid, lactic acid, malic acid, tartaric acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, 1-hydroxyethylidene-1,1-diphosphonic acid, bis(poly-2-carboxyethyl)phosphinic acid , phosphinocarboxylic acid copolymers, or salts thereof. Among these, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, methylglycinediacetic acid, glutamic acid diacetic acid, nitrilotriacetic acid, or salts thereof are preferred from the viewpoint of improving the ability to eliminate spore-forming bacteria.

When the above-mentioned chelating agent is in the form of a salt, the component (C) of the present invention may be a salt with an alkali metal such as sodium or potassium, an ammonium salt, or a salt with an organic amine, and is preferably a sodium salt or an organic amine salt. is preferred, and monoethanolamine salts and monoisopropanolamine salts are more preferred. Chelating agents in the form of alkanolamine salts may improve the low temperature stability of the liquid disinfectant detergent compositions of the present invention.

As the water which is component (D) in the liquid sterilizing detergent composition of the present invention, tap water, softened water, pure water, RO water, ion exchange water, and distilled water can be used. From an economic point of view, tap water is preferred. As for tap water, for example, tap water in Arakawa-ku, Tokyo (pH = 7.6, total alkalinity (in terms of calcium carbonate) 40.5 mg/L, German hardness 2.3° DH (of which calcium hardness is 1.5 mg/L). 7°DH, magnesium hardness 0.6°DH), chloride ion 21.9mg/L, sodium and its compounds 15mg/L, nitrate nitrogen and nitrite nitrogen 1.2mg/L, fluorine and its compounds 0. 1 mg/L, boron and its compounds 0.04 mg/L, total trihalomethane 0.016 mg/L, residual chlorine 0.4 mg/L, and organic matter (total organic carbon content) 0.7 mg/L). Water is blended so that the entire liquid sterilizing detergent composition is 100% by mass (if necessary, when blending components (D) to (F) and optional components described below, the total amount including these) is 100% by mass).

The concentration of component (A) in the liquid sterilizing detergent composition of the present invention is not particularly limited. However, the concentration of component (A) is usually 0.1% by mass or more and 10% by mass or less, and 0.5% by mass or more and 6% by mass or less, based on the total amount of the liquid sterilizing detergent composition. It is preferably 1% by mass or more and 4% by mass or less.
As described below, the liquid sterilizing detergent composition of the present invention may be used as a sterilizing solution diluted with water or hot water, and if the component (A) is less than 0.1% by mass, it will not be diluted. In some cases, the concentration may become extremely low and a sufficient sterilization effect against spore-forming bacteria may not be expected. Furthermore, if the content of component (A) is higher than 10% by mass, the storage stability of the liquid sterilizing detergent composition of the present invention may deteriorate.

The concentration of component (B) in the liquid sterilizing detergent composition of the present invention is not particularly limited. However, the concentration of component (B) is usually 1% by mass or more and 15% by mass or less, preferably 3% by mass or more and 14% by mass or less, based on the total amount of the liquid sterilizing detergent composition. More preferably 12% by mass or less.
If the content of component (B) is less than 1% by mass, when the liquid sterilizing detergent composition of the present invention is diluted, the concentration will be extremely low, and sufficient sterilizing and cleaning effects may not be expected. Furthermore, if the content of component (B) exceeds 15% by mass, the storage stability of the liquid sterilizing detergent composition of the present invention may deteriorate.

The concentration of component (C) in the liquid sterilizing detergent composition of the present invention is not particularly limited. However, the concentration of component (C) is usually 0.5% by mass or more and 20% by mass or less, preferably 3% by mass or more and 15% by mass or less, based on the total amount of the liquid sterilizing detergent composition. , more preferably 6% by mass or more and 13% by mass or less.
If the content of component (C) is less than 0.5% by mass, the concentration of the liquid sterilizing detergent composition of the present invention will be extremely low when diluted, and a sufficient sterilizing effect against spore-forming bacteria may not be expected. . Furthermore, if the content of component (C) is higher than 20% by mass, the corrosion prevention properties and storage stability for aluminum of the liquid sterilizing cleaning composition of the present invention may deteriorate.

In the liquid sterilizing detergent composition of the present invention, the mass ratio (A)/(B) of component (A) and component (B) is preferably 0.006 or more and 10 or less, and 0.01 or more and 4 or less. is more preferable, and most preferably 0.1 or more and 1.5 or less. When the mass ratio (A)/(B) is 0.006 or more and 10 or less, the liquid sterilizing detergent composition of the present invention can effectively exhibit the sterilizing effect on general bacteria, and also has better cleaning performance. improves.

In the liquid sterilizing detergent composition of the present invention, the mass ratio (A)/(C) of component (A) to component (C) is preferably 0.005 or more and 20 or less, and 0.05 or more and 5 or less. is more preferable, and most preferably 0.1 or more and 0.9 or less. When the mass ratio (A)/(C) is 0.005 or more and 20 or less, the liquid sterilizing detergent composition of the present invention can effectively exhibit the sterilizing effect on spore bacteria, and also has storage stability. Improve more.

In the liquid sterilizing detergent composition of the present invention, the remainder other than the above-mentioned components (A) to (C) can be the component (D).

The liquid sterilizing detergent composition of the present invention may further contain, as component (E), one or more alkyldimethylamine oxides whose alkyl group has 8 to 16 carbon atoms. This component (E) contributes to the detergency and storage stability of the liquid sterilizing detergent composition of the present invention. Furthermore, when the liquid sterilizing detergent composition of the present invention is used by foaming with a foaming cleaning machine (spray gun) or the like, component (E) contributes to the adhesion of the foam to vertical surfaces.

Examples of alkyldimethylamine oxides whose alkyl group has 8 to 16 carbon atoms include octyldimethylamine oxide, decyldimethylamine oxide, lauryldimethylamine oxide, tetradecyldimethylamine oxide, hexadecyldimethylamine oxide, and cetyldimethylamine oxide. Can be mentioned. Among these, alkyldimethylamine oxides in which the alkyl group has 8 to 14 carbon atoms are preferred, and alkyldimethylamine oxides in which the alkyl group has 8 to 10 carbon atoms are more preferred.

The concentration of component (E) in the liquid sterilizing detergent composition of the present invention is not particularly limited. However, the concentration of component (E) is usually 0.1% by mass or more and 10% by mass or less, and 0.3% by mass or more and 7% by mass or less, based on the total amount of the liquid disinfectant cleaning composition. is preferable, and more preferably 1% by mass or more and 5% by mass or less.
If the content of component (E) is less than 0.1% by mass, the liquid sterilizing detergent composition of the present invention may not have sufficient effects on detergency, storage stability, and foam adhesion to vertical surfaces. Further, even if the content of component (E) exceeds 10% by mass, the effect commensurate with the amount added may not be observed.

The liquid sterilizing detergent composition of the present invention may further contain one or more anionic surfactants as component (F). This component (F) contributes to the cleaning performance of the present invention, and also contributes to the adhesion of foam to vertical surfaces when the liquid sterilizing cleaning composition is foamed with a foaming cleaning machine (spray gun) etc. do.
Examples of anionic surfactants include alkyl sulfate salts, alkyl ether sulfate salts, alkanesulfonates, secondary alkanesulfonates, linear alkylbenzene sulfonates, α-olefin sulfonates, and alkyldiphenyl ethers. Examples include sulfonates, sulfosuccinates, alkyl ether carboxylates, and the like. Among these, alkyl ether sulfate salts, secondary alkanesulfonate salts, and linear alkylbenzene sulfonate salts are preferred.

The anionic surfactant is a compound in the form of a salt, and may be, for example, an alkali metal salt such as sodium or potassium; an alkaline earth metal salt such as magnesium; or an alkanolamine salt such as monoethanol ammonium or diethanol ammonium. .

The alkyl group of the alkyl sulfate salt is preferably an alkyl group having 8 to 18 carbon atoms. Specific examples of alkyl sulfate salts include sodium lauryl sulfate and sodium myristyl sulfate.
The alkyl group of the alkyl ether sulfate salt is preferably an alkyl group having 10 to 18 carbon atoms. Further, the alkyl ether sulfate salt has an oxyethylene group and/or an oxypropylene group, and the average repeating number n of the oxyethylene group is preferably 1 to 5, and the average repeating number m of the oxypropion group is 0 to 5. It is preferable that it is 1. Examples of alkyl ether sulfate salts include sodium polyoxyethylene lauryl ether sulfate.

As the alkanesulfonate and secondary alkanesulfonate, it is preferable to use an alkanesulfonate having 14 to 18 carbon atoms, and specifically, sodium secondary alkane (C14 to 17) sulfonate, hydroxyalkane Examples include (C14-16) sodium sulfonate.

The alkyl group of the linear alkylbenzene sulfonate is preferably an alkyl group having 8 to 16 carbon atoms. Specific examples of the linear alkylbenzenesulfonate include sodium laurylbenzenesulfonate and sodium tetradecylbenzenesulfonate.

The alkenyl group of the α-olefin sulfonate is preferably an alkyl group having 8 to 20 carbon atoms. Specific examples of the α-olefin sulfonate include Liporan LB-440 manufactured by Lion Corporation.
The alkyl group of the alkyldiphenyl ether sulfonic acid is preferably an alkyl group having 8 to 18 carbon atoms. Specific examples of the alkyl diphenyl ether sulfonic acid include Perex SS-H and Perex SS-L manufactured by Kao Corporation.
Sulfosuccinic acid is a succinic acid alkyl ester having a sulfo group, and the alkyl group preferably has 6 to 18 carbon atoms. Specific examples of the sulfosuccinic acid include dioctyl sodium sulfosuccinate, didecyl sodium sulfosuccinate, didodecyl sodium sulfosuccinate, and di-2-ethylhexyl sodium sulfosuccinate.

The alkyl group of the alkyl ether carboxylate is preferably an alkyl group having 8 to 18 carbon atoms. Further, the alkyl ether carboxylate has an oxyethylene group and/or an oxypropylene group, the average repeating number n of the oxyethylene group is preferably 1 to 10, and the average repeating number m of the oxypropion group is 0. ˜1 is preferable.

The concentration of component (F) in the liquid sterilizing detergent composition of the present invention is not particularly limited. However, the concentration of component (F) is usually 0.1% by mass or more and 5% by mass or less, and 0.3% by mass or more and 3% by mass or less, based on the total amount of the liquid disinfectant cleaning composition. is preferable, and more preferably 0.5% by mass or more and 2% by mass or less.
If the content of component (F) is less than 0.1% by mass, the liquid sterilizing detergent composition of the present invention may not have sufficient cleaning properties and foam adhesion to vertical surfaces. Further, even if the content of component (F) exceeds 5% by mass, the effect commensurate with the amount added may not be observed.

In the liquid sterilizing detergent composition of the present invention, it is preferable not to use a cationic surfactant. In particular, when component (F) is included, the effects of each component may not be recognized due to interaction with component (F).

The pH of the liquid sterilizing detergent composition of the present invention at 25° C. during use is 7.5 or more and 13 or less, preferably 8.0 to 12, more preferably 8.2 to 11. The liquid sterilizing detergent composition of the present invention can be used as a undiluted solution or diluted with water or hot water, but the pH of the diluted solution diluted 2 to 500 times at 25° C. is preferably 7.5 or more and 13 or less. When it is 8.0 to 12, more preferably 8.2 to 11, the sterilization effect against spore-forming bacteria is effectively exhibited. If the pH of the liquid sterilizing detergent composition of the present invention is less than 7.5, no sterilizing effect on spore bacteria will be observed, and if it is 13 or more, corrosion of the metal parts of the object to be sterilized and cleaned will occur. I end up.

The liquid sterilizing detergent composition of the present invention may contain a solubilizer as component (G), if necessary. Incorporation of a solubilizer has the effect of improving the stability of the composition. As a solubilizer for component (G) of the present invention, xylene sulfonic acid, sodium xylene sulfonate, potassium xylene sulfonate, toluenesulfonic acid, sodium toluenesulfonate, potassium toluenesulfonate, benzoic acid, sodium benzoate, benzoic acid Potassium, cumene sulfonic acid, sodium cumene sulfonate, potassium cumene sulfonate, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, hexylene glycol, isoprene glycol, glycerin, 1,3-butylene Examples include glycol, 1,4-butylene glycol, polypropylene glycol, polyethylene glycol, ethanol, propanol, butanol, and preferably ethylene glycol, propylene glycol, glycerin, and ethanol. These may be used alone or in combination of two or more.

The concentration of component (G) in the liquid sterilizing detergent composition of the present invention is not particularly limited. However, the concentration of component (G) is usually 0.01% by mass or more and 10% by mass or less, and 0.3% by mass or more and 6% by mass or less, based on the total amount of the liquid disinfectant cleaning composition. is preferable, and more preferably 0.5% by mass or more and 4% by mass or less.
If the content of component (G) is less than 0.01% by mass, the effect of improving the storage stability of the liquid sterilizing detergent composition of the present invention may not be sufficiently observed. Further, even if the content of component (G) exceeds 10% by mass, the effect commensurate with the amount added may not be observed.

In order to adjust the pH of the liquid sterilizing detergent composition of the present invention, a pH adjuster can be used as the component (H), if necessary. Examples of the base component (H) include sodium hydroxide, potassium hydroxide, monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, N-methylethanolamine, N-methyl Examples include diethanolamine, N,N-dimethylpropane-1,3-diamine, and preferable examples include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, and alkanolamines such as monoethanolamine and monoisopropanolamine. . These may be used alone or in combination of two or more. In addition, the acid components of component (H) include hydrochloric acid, acetic acid, propionic acid, lactic acid, malic acid, citric acid, benzoic acid, malonic acid, succinic acid, glutaric acid, adipic acid, gluconic acid, ethylenediaminetetraacetic acid, phosphoric acid, Examples include butanetricarboxylic acid and phosphoric acid, but hydrochloric acid, lactic acid, and citric acid are preferred. These may be used alone or in combination of two or more.

The liquid sterilizing detergent composition of the present invention may further contain surfactants other than those mentioned above, dispersants, natural extracts, other sterilizing ingredients, enzymes, dyes, antifoaming agents, foaming agents, Preservatives, fragrances, corrosion inhibitors, etc. can be added.
There are no particular limitations on the method for producing the liquid sterilizing detergent composition of the present invention, and it can be produced by a conventional method such as stirring and mixing each component.

Examples of the dispersant include polyacrylic acid, polymaleic acid, polymethacrylic acid, acrylic acid type copolymers, maleic acid type copolymers, methacrylic acid type copolymers, acrylic acid-sulfonic acid type monomer copolymers, etc. can be mentioned.

Examples of natural extracts include plants of the Cannabis family, Rubiaceae, Cruciferae, Poaceae, Persimmonaceae, Asteraceae, Lamiaceae, Zingiberaceae, Camellia, Solanaceae, and Cupressaceae. Examples include natural extracts derived from plants such as plants, Myrtaceae, Vitaceae, leguminous, Rutaceae, and Liliaceae, and animal-derived natural extracts such as lysozyme and shirako protein extract.

Other disinfecting ingredients include hypochlorous acid or its salts, chlorine bleaches such as dichloroisocyanuric acid or its salts, and microbial-derived antibacterial peptides such as ε-polylysine, poly-γ-glutamic acid, and nisin. .

In the sterilization method using the liquid sterilizing detergent composition of the present invention, the above liquid sterilizing detergent composition can be used as a sterilizing solution as it is, or it can be diluted 2 to 500 times with water or hot water. It is also possible to prepare and use a liquid. The water or hot water here can be the same tap water, softened water, pure water, RO water, ion exchange water, or distilled water as used for component (D) of the liquid sterilizing detergent composition of the present invention.

The component (A) in the sterilizing solution obtained by diluting the liquid sterilizing detergent composition of the present invention is usually 0.00025% by mass or more and 0.05% by mass or less based on the total mass of the sterilizing solution. It is preferably 0.00125% by mass or more and 0.03% by mass or less, and particularly preferably 0.0025% by mass or more and 0.02% by mass or less.
The component (B) in the sterilizing solution obtained by diluting the liquid sterilizing detergent composition of the present invention is usually 0.0025% by mass or more and 0.5% by mass or less based on the total mass of the sterilizing solution. It is preferably 0.0075% by mass or more and 0.07% by mass or less, and particularly preferably 0.0125% by mass or more and 0.06% by mass or less.

The component (C) in the sterilizing solution obtained by diluting the liquid sterilizing detergent composition of the present invention is usually 0.00125% by mass or more and 0.25% by mass or less based on the total mass of the sterilizing solution. It is preferably 0.0075% by mass or more and 0.075% by mass or less, and particularly preferably 0.015% by mass or more and 0.065% by mass or less.
The component (F) in the sterilizing solution obtained by diluting the liquid sterilizing detergent composition of the present invention is usually 0.00025% by mass or more and 0.025% by mass or less based on the total mass of the sterilizing solution. It is preferably 0.00075% by mass or more and 0.015% by mass or less, and particularly preferably 0.002% by mass or more and 0.01% by mass or less.

The liquid sterilizing detergent composition of the present invention is useful for sterilization in a wide range of fields (food field, brewing field, medical field, agricultural field, etc.) where contamination or contamination with fungi and microorganisms including spore bacteria is a problem. be. For example, sterilization of containers and production lines at food processing factories for dairy products, milk processed products, soybean products, soybean processed products, beer, wine, sake, miso, soy sauce, etc., and sterilization of medical instruments such as endoscopes. Sterilization, cleaning of dialysis lines, control of pathogenic microorganisms in processed water of vegetables and fruits, control of microorganisms attached to seeds that cause plant disease or damage and rotting of seedlings, poultry consumption in poultry slaughterhouses. It can be suitably used to reduce pathogenic bacteria on the surface of meat, and in particular, to sterilize containers and packaging materials (PET bottles and caps) in the production of soft drinks in PET bottles using aseptic filling methods, or to strengthen sterilization of the line. .

When carrying out the sterilization method using the liquid sterilizing detergent composition of the present invention, the temperature of the sterilizing solution containing the liquid sterilizing detergent composition is adjusted to 0°C to 90°C.
The sterilization method of the present invention employs methods such as spraying a sterilizing solution onto the object to be sterilized and cleaning using a foam cleaning machine (spray gun), or immersing the object to be sterilized and cleaned in the sterilization solution. can do. The spraying time and immersion time can be appropriately selected depending on the type and amount of microorganisms, the type and amount of organic or inorganic stains, the concentration of the sterilizing solution, and the like.

When performing sterilization by spraying a sterilizing liquid onto the object to be sterilized and cleaned, for example, the sterilizing liquid containing the liquid sterilizing cleaning composition of the present invention is foamed with a sprayer or a foaming cleaning machine. 0.05 to 0.9 g/cubic centimeter of foam or a mixture of foam and liquid is sprayed onto the object to be sterilized and then left to stand or scrubbed and rinsed with water. Examples of the sprayer include a trigger-type hand sprayer that mixes air from the outside to create foam. Examples of foaming cleaning machines include devices such as the 910N PORTABLE FOAMER made by DEMA, which pumps liquid with an air-driven diaphragm pump and mixes compressed air and a diluted foaming cleaning composition to foam and spray. It will be done.

Hereinafter, the present invention will be specifically explained with reference to Examples and Comparative Examples. Each component used in the formulation in Examples and Comparative Examples is shown below. In addition, in the following Examples and the like, "%" represents mass % unless otherwise specified, and the numerical values of the formulations of Examples and Comparative Examples in the table represent mass % of pure content. The compounds used in Examples and Comparative Examples are described below. Further, regarding the notation of an alkyl group, for example, when it is written as alkyl (C8-18), it represents a mixture having an alkyl group having 8 or more and 18 or less carbon atoms.

(A) Component A-1: Sodium lauryl diaminoethylglycine (trade name: Revon S, manufactured by Sanyo Chemical Industries, Ltd., a compound represented by the general formula (1), where R ¹ is mainly an alkyl group having 12 carbon atoms. ( ^R2 is a hydrogen atom, m is 2, and n is 0)
A-2: Alkyl (C12-14) diaminoethylglycine hydrochloride (trade name: Revon T-2, manufactured by Sanyo Chemical Industries, Ltd., a compound represented by the general formula (1), where R ¹ mainly has a carbon number of 12 ~14 alkyl group, R ² is a hydrogen atom, m is 2, and n is 0)
A-3: Alkyl polyaminoethylglycine hydrochloride (trade name: Revon 50, manufactured by Sanyo Chemical Industries, Ltd., a compound represented by the general formula (1), where R ¹ and R ² are mainly alkyl groups having 8 carbon atoms. , m is 1 or 2, and n is 0 or 1)

(B) Component B-1: Sodium lauryl amino dipropionate (trade name: Energy Call DP-30, manufactured by Lion Specialty Chemicals)
B-2: 2-Alkyl-N-carboxyethyl-N-hydroxyethylimidazolinium betaine (trade name: Energy Call CNS, manufactured by Lion Specialty Chemicals)
B-3: Amidopropyl betaine laurate (trade name: Amhitol 20AB, manufactured by Kao Corporation)
B-4: Lauryldimethylaminoacetic acid betaine (trade name: Amhitol 20BS, manufactured by Kao Corporation)
B'-1: Didecyldimethylammonium chloride (product name: Lipocard 210-80E, manufactured by Lion Specialty Chemicals)

(C) Component C-1: Sodium ethylenediaminetetraacetate C-2: Ethylenediaminetetraacetic acid monoethanolamine salt C-3: Ethylenediaminetetraacetic acid monoisopropanolamine salt C-4: Methylglycine diacetic acid monoethanolamine salt C-5: Glutamic acid diacetic acid monoethanolamine salt C-6: Sodium tripolyphosphate

(D) Component D-1: Tap water

(E) Component E-1: Octyldimethylamine oxide E-2: Decyldimethylamine oxide E-3: Tetradecyldimethylamine oxide E-4: Hexadecyldimethylamine oxide

(F) Component F-1: Sodium laurylbenzenesulfonate (Teika Power L121, manufactured by Teika)
F-2: Secondary alkane (C14-17) sodium sulfonate (HOSTAPUR SAS30 manufactured by Clariant Japan)

Solubilizer (G) component G-1: Propylene glycol G-2: Ethanol

pH adjuster (H) component H-1: Hydrochloric acid H-2: Sodium hydroxide

The composition of each example was prepared by adding water as component (D) to a mixing tank so that the total of the composition was 100% by mass, and then adding component (A), component (B), and component (C) (if necessary). (E) component, (F) component, (G) component, and (H) component) were blended into a mixing tank and thoroughly mixed and stirred.

Examples 1 to 50, Comparative Examples 1 to 7
Antibacterial cleaning compositions shown in Tables 1 to 6 were prepared. Using each disinfectant cleaning composition, disinfection properties, metal corrosion prevention properties, and storage stability were measured. Tables 1 to 5 show the results of Examples 1 to 50, and Table 6 shows the results of Comparative Examples 1 to 7, respectively.
Note that Example 21 is a reference example.

*1: How to measure pH Connect the composite electrode for pH measurement (manufactured by HORIBA; glass rubbed sleeve type) to the pH meter (manufactured by HORIBA; pH/Ion Meter F-23) and turn on the power. A saturated aqueous potassium chloride solution (3.33 mol/L) was used as the pH electrode internal solution.
Next, fill a 100 mL beaker with each of pH 4.01 standard solution (phthalate standard solution), pH 6.86 (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution), It was immersed in a constant temperature bath at ℃ for 30 minutes. The pH measuring electrode was immersed in a standard solution adjusted to a constant temperature for 3 minutes, and a calibration operation was performed in the order of pH 6.86 → pH 9.18 → pH 4.01.
Each sterilizing detergent composition was filled into a 100 mL beaker, and the temperature was adjusted to 25° C. in a constant temperature bath. The pH of the composition was measured by immersing a pH measuring electrode into the sample which had been kept at a constant temperature for 3 minutes.

*2: Eradication test (spore bacteria)
Bacillus subtilis (NBRC3134) and Bacillus cereus (NBRC15305) were used as test bacterial strains.

2-1: Preparation of spore suspension The test bacterial strain was smeared onto an SCD agar medium (Nissui Pharmaceuticals) and cultured at 37°C. After culturing, confirm that sufficient spores have been formed by microscopic observation. confirmed. 10 mL of sterilized pure water was placed on the plate medium, and the colonies were scraped off to collect the suspension. The collected suspension was centrifugally washed three times at 10,000 rpm and 4°C for 15 minutes, and after centrifugation, an appropriate amount of sterilized pure water was added to reduce the number of bacteria from 2.0 to 9.0 x 10 ⁸ The spore suspension was prepared to approximately CFU/ml and heated in a water bath at 80°C for 15 minutes to obtain a spore suspension.

2-2: Preparation of sterilized neutralized solution 10 g of soybean lecithin, 30 g of Tween 80, 1 g of L-histidine, and 20 g of sodium thiosulfate were dissolved in 1 L of distilled water under heating, and cooled while stirring. Thereafter, 9 mL of each was dispensed into test tubes with screw caps, and high-pressure sterilization (121° C., 20 minutes) was performed to obtain a sterilized neutralized solution.

2-3: Eradication test (spore bacteria)
Test method:
Each disinfectant cleaning composition was diluted to 0.25% by mass with ion-exchanged water, and added to 10 mL of the disinfectant cleaning solution to give a final concentration of 1.5 to 5.0×10 ⁵ (CFU/ml). 0.1 mL of each spore suspension was added and the sterilizing cleaning solution and the spore suspension were brought into contact at 25°C for 18 hours, and the test solutions were left in contact at 40°C for 60 minutes. 1 mL of each test solution was added to the sterile neutralization solution and mixed well. The mixture was mixed and solidified on an SCD agar medium, and cultured at 37°C for 2 days. After culturing, the number of viable bacteria was measured, and the sterilization performance was evaluated based on the difference from the initial number of bacteria using the following criteria. Items rated △, ◎, and ◎ were judged to be practical.

Evaluation criteria 3 points: Log reduction of the test bacteria is 3 or more 2 points: Log reduction of the test bacteria is 2 or more but less than 3 1 point: Log reduction of the test bacteria is 1 or more but less than 2 0 points: Test bacteria For those that were contacted at 25°C for 18 hours with a log reduction of less than 1 and those that were contacted at 40°C for 60 minutes, the reduction in the number of viable bacteria was evaluated using the above scores, the average value was determined, and the following criteria were used. Bactericidal properties were evaluated.
◎: Average value is 3 points ○: Average value is 2 points or more, less than 3 points △: Average value is 1 point or more, less than 2 points ×: Average value is less than 1 point

*3: Sterilization test (mold spores)
Aspergillus niger (IFO9455) was used as the test strain.

3-1: Preparation of spore suspension (Aspergillus niger)
The test mold was smeared on a PDA agar medium (Nissui Pharmaceutical Co., Ltd.) and cultured at 25°C. After culturing, sufficient spore formation was confirmed by microscopic observation. 10 mL of sterilized physiological saline supplemented with 0.05% Tween 20 was placed on the plate medium, and colonies were scraped off to collect a suspension. The collected suspension was passed through sterilized gauze to remove unnecessary mycelium, and then centrifuged at 10,000 rpm for 15 minutes at 4°C three times. After centrifugation, sterilized physiological saline containing 0.05% Tween 20 was added. An appropriate amount of water was added to adjust the bacterial count to about 2.0 to 9.0 x 10 ⁸ CFU/mL to obtain a spore suspension.

3-2: Preparation of sterilized neutralized solution 10 g of soybean lecithin, 30 g of Tween 80, 1 g of L-histidine, and 20 g of sodium thiosulfate were dissolved in 1 L of distilled water under heating, and cooled while stirring. Thereafter, 9 mL of each was dispensed into test tubes with screw caps, and high-pressure sterilization (121° C., 20 minutes) was performed to obtain a sterilized neutralized solution.

3-3: Eradication test (Aspergillus niger)
Test method:
Each disinfectant cleaning composition was diluted to 0.25% by mass with ion-exchanged water and added to 10 mL of a disinfectant cleaning solution to give a final concentration of 1.5 to 5.0×10 ⁵ (CFU/mL). A test solution was prepared by adding 0.1 mL of the spore suspension and bringing the sterilizing cleaning solution into contact with the spore suspension at 25° C. for 30 minutes. 1 mL of this test solution was added to the sterile neutralization solution and stirred well. The mixture was mixed and solidified on a PDA agar medium, and cultured at 37°C for 4 days. After culturing, the number of viable bacteria was measured, and the sterilization performance was evaluated based on the difference from the initial number of bacteria using the following criteria. Items rated △, ◎, and ◎ were judged to be practical.
Evaluation criteria ◎: Log reduction of the test bacteria is 3 or more ○: Log reduction of the test bacteria is 2 or more but less than 3 △: Log reduction of the test bacteria is 1 or more but less than 2 ×: Log reduction of the test bacteria is less than 1

*4: Sterilization test (vegetative cells)
The bacterial strains tested were Escherichia coli (NBRC3972), Staphylococcus aureus (NBRC13276), Pseudomonas aeruginosa (NBRC13275), and cationic surfactant-resistant strains. Serratia marcescens showing (Seratia marcescens) (field isolated bacterium) was used.

4-1: Culture of bacterial strains Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa were spread on SCD agar medium (Nissui Pharmaceuticals) and cultured at 37°C for 24 hours, and Serratia marcescens contained a cationic surfactant. After culturing at 30° C. for 24 hours, the colonies were scraped off and each diluted with sterile phosphate buffered saline and used as a bacterial suspension.

4-2: Preparation of sterilized neutralized solution 10 g of soybean lecithin, 30 g of Tween 80, 1 g of L-histidine, and 20 g of sodium thiosulfate were dissolved in 1 L of distilled water under heating, and cooled while stirring. Thereafter, 9 mL of each was dispensed into test tubes with screw caps, and high-pressure sterilization (121° C., 20 minutes) was performed to obtain a sterilized neutralized solution.

4-3: Eradication test (vegetative cells)
Test method:
Each liquid disinfectant cleaning composition was diluted to 0.25% by mass with ion-exchanged water, and added to 10 mL of the disinfectant cleaning solution at a final concentration of 1.5 to 5.0 x 10 ⁸ (CFU/mL). 0.1 mL of each bacterial suspension was added to the solution, and the solution was left in contact with the solution at 25° C. for 5 minutes, and this was used as the test solution. 1 mL of each test solution was added to the sterile neutralization solution and mixed well. After mixing and solidifying the mixture on an SCD agar medium for Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa, the mixture was cultured at 37°C for 2 days, and for Serratia marcescens, after mixing and solidifying on an SCD agar medium (Nissui Pharmaceuticals), The cells were cultured at 30°C for 2 days. After culturing, the number of viable bacteria was measured, and the sterilization performance was evaluated based on the difference from the initial number of bacteria using the following criteria. Items rated △, ◎, and ◎ were judged to be practical.

Evaluation criteria ◎: Log reduction of the test bacteria is 4 or more ○: Log reduction of the test bacteria is 2 or more but less than 4 △: Log reduction of the test bacteria is 1 or more but less than 2 ×: Log reduction of the test bacteria is less than 1

*5: Metal corrosion prevention test (stainless steel)
Test method:
A test piece [stainless steel (SUS304), length 50 mm x width 30 mm x thickness 1 mm] is used which has been previously washed with a neutral detergent, treated with acetone, and dried. Pour 60 mL of a cleaning solution prepared by diluting each liquid sterilizing cleaning composition to 0.25% by mass with hard water of 75 mg/L [German hardness 4.2° DH] in terms of calcium carbonate into a 70 mL glass bottle with a lid. A test piece was immersed therein and immersed for 24 hours in a thermostat at 80°C. Thereafter, the test piece was taken out, rinsed with ion-exchanged water, dried, and the external appearance of the test piece surface was visually observed, and the corrosivity was determined according to the following criteria.
Evaluation criteria:
◯: No corrosion △: Slight corrosion is observed, but there is no problem in use ×: Corroded, and ◯ and △ are judged as having practical use.

*6: Metal corrosion prevention test (aluminum)
Test method:
A test piece [aluminum (A1100P), length 50 mm x width 30 mm x thickness 1 mm] is used which has been previously washed with a neutral detergent, treated with acetone, and dried. Pour 60 mL of a cleaning solution prepared by diluting each liquid sterilizing cleaning composition to 0.25% by mass with hard water of 75 mg/L [German hardness 4.2° DH] in terms of calcium carbonate into a 70 mL glass bottle with a lid. A test piece was immersed therein and immersed in a 40°C thermostat for 24 hours. Thereafter, the test piece was taken out, rinsed with ion-exchanged water, dried, and the external appearance of the test piece surface was visually observed, and the corrosivity was determined according to the following criteria.
Evaluation criteria:
◯: No corrosion △: Slight corrosion is observed, but there is no problem in use ×: Corroded, and ◯ and △ are judged as having practical use.

*7: Storage stability test method:
100 g of each liquid sterilizing detergent composition was placed in a polypropylene container and left to stand for one month at -5°C, 25°C, and 40°C, and then the appearance was observed.
Evaluation criteria:
◎: Stable with no separation or turbidity ○: Slight changes observed, but stable with no separation or turbidity △: No overall separation and slight turbidity observed, but used There is no problem ×: Separation or turbidity is observed
△, ○, and ◎ were judged to be practical.

*8: Cleaning power test method:
Apply oil (10 g of beef tallow, 10 g of soybean oil, 0.25 g of monoolein, 0.1 g of Sudan III dissolved in 60 mL of chloroform) to a stainless steel piece [stainless steel (SUS304), length 70 mm x width 60 mm x thickness 1 mm], The test piece was dried at 25°C for 1 hour and its weight was measured. This test piece was immersed in 200 mL of a cleaning solution prepared by diluting each disinfectant cleaning composition to 1% by mass with hard water of 75 mg/L [German hardness 4.2° DH] in terms of calcium carbonate, and left for 10 minutes. After that, the sample was rinsed with ion-exchanged water for 15 seconds, air-dried, and weighed. The cleaning rate of oil and fat stains was calculated from the change in weight of the test piece before and after cleaning, and the cleaning power was evaluated using the following criteria.
Evaluation criteria:
◎: Cleaning rate 80% or more ○: Cleaning rate 60% or more, less than 80% △: Cleaning rate 40% or more, less than 60% ×: Cleaning rate less than 40%, and △, ○, and ◎ are considered practical. I judged it.

*9: Test method for foam adhesion to vertical surfaces:
A diluted solution prepared by diluting each liquid sterilizing detergent composition to 5% by mass at 20°C with hard water having a calcium carbonate equivalent of 75 mg/L [German hardness 4.2° DH] was added to DEMA's 910 PORTABLE. After foaming with FOAMER into a foam with a specific gravity of 0.15 g/cubic centimeter, the thickness of the foam becomes 2 cm or less for an area of 1 m long and 1 m wide on the vertical surface of a stainless steel piece [stainless steel (SUS304)]. After 3 minutes, the degree of adhesion to the vertical wall surface was visually evaluated according to the following criteria.
Evaluation criteria:
◎: Foam retention is 70% or more ○: Foam retention is 60% or more and less than 70% △: Foam retention is 50% or more and less than 60% ×: Foam retention is less than 50%, △, ○, ◎ was judged to be practical.

Claims (7)

(A) As a component, an amphoteric surfactant represented by the following general formula (1) or a salt thereof;
As the component (B), one or two selected from sodium lauryl amino dipropionate, 2-alkyl-N-carboxyethyl-N-hydroxyethylimidazolinium betaine, lauric acid amidopropyl betaine, and lauryl dimethylamino acetic acid betaine. more than species,
(C) As a component, a chelating agent;
(D) A liquid disinfectant cleaning composition containing water as the component and having a pH of 8.0 to 13 at 25°C.

(In the formula, R ¹ is an alkyl group having 6 to 18 carbon atoms, R ² is a hydrogen atom or an alkyl group having 6 to 18 carbon atoms; m is an integer of 1 to 4, and n is an integer of 0 to 2.) The liquid sterilizing detergent composition according to claim 1, wherein the mass ratio (A)/(C) of component (A) and component (C) is 0.005 to 20. Component (C) is one or more selected from ethylenediaminetetraacetic acid, nitrilotriacetic acid, diethylenetriaminopentaacetic acid, triethylenetetraaminehexaacetic acid, glutamic acid diacetic acid, methylglycine diacetic acid, and salts thereof. The liquid sterilizing detergent composition according to claim 1 or 2 . The liquid sterilizer according to any one of claims 1 to 3 , further comprising, as component (E), one or more alkyldimethylamine oxides whose alkyl group has 8 to 16 carbon atoms. Cleaning composition. The liquid sterilizing detergent composition according to any one of claims 1 to 4 , further comprising one or more anionic surfactants as component (F). A step of immersing an object to be sterilized and cleaned in a sterilizing cleaning liquid containing the liquid sterilizing cleaning composition according to any one of claims 1 to 5 , and removing the sterilizing cleaning liquid from the object to be sterilized and cleaned after immersion. A sterilization cleaning method that includes a step of removing bacteria. A sterilizing cleaning solution containing the liquid sterilizing cleaning composition according to any one of claims 1 to 5 is foamed to form foam or a mixture of foam and liquid with a specific gravity of 0.05 to 0.9 g/cm3. A sterilization cleaning method comprising the steps of spraying the surface of the object to be sterilized and cleaned, a step of spraying the object to be sterilized and then letting it stand or scrubbing it, and rinsing with water.