Detergent composition

Abstract

Provided are: a detergent composition which exhibits good storage stability under low temperature conditions envisaged in winter and good storage stability of oxidizing halogen acids under high temperature conditions envisaged in summer, and exhibits excellent foam rinsing properties despite exhibiting good foaming properties when diluted and used; and a method for cleaning hard surfaces using said detergent composition.　A detergent composition according to the present invention contains 0.005-5 mass% of component (a), 0.01-15 mass% of component (b), 0.01-15 mass% of component (c), 0.1-10 mass% of component (d), 0.1-8 mass% of component (e), and water. Component (a): a carboxylic acid having a chain-like branched hydrocarbon group having a total of 11-23 carbon atoms, and / or a salt thereof, wherein the number of carbon atoms in the main chain of the chain-like branched hydrocarbon group is 7- 21, and branching positions of all side chains are the 3-position or higher of the main chain. Component (b): an anionic surfactant (excluding component (a)). Component (c): an alkaline agent. Component (d): an oxidizing halogen acid and / or a salt thereof. Component (e): a hydrotrope agent.

Description

Cleaning composition

[0001] The present invention relates to a detergent composition and a method for cleaning hard surfaces, and further to a foaming detergent composition for use by foaming and a method for cleaning hard surfaces with the foamed foam.

[0002] BACKGROUND ART In food processing factories, machinery and equipment used in food processing and / or cooking are regularly cleaned during interruptions in production schedules to ensure sanitary conditions. Examples of equipment to be cleaned include net conveyors, freezers, slicers, and rice polishers, while examples of equipment include floors, walls, and work tables. Because these cleaning targets are large and complex, typically foaming cleaning, in which a cleaning agent is foamed into a foam and applied to the target, is employed as an efficient cleaning method. Furthermore, since food is handled, such foaming cleaning agents are required to have high cleaning effectiveness as a countermeasure against food poisoning and other pathogens. Furthermore, because they are used diluted, they contain relatively high concentrations of inorganic alkali agents and hypochlorous acid. In this case, inorganic alkali agents are subject to concerns about precipitation at low temperatures in winter, and maintaining the storage stability of hypochlorite salts in summer poses a challenge. Furthermore, foaming cleaning agents not only have excellent foaming properties when diluted, but also require a large amount of rinsing water. Therefore, from an environmental perspective, technologies that improve defoaming and reduce rinsing water consumption are needed.

[0003] Japanese Patent Laid-Open Publication No. 2019-199619 discloses a method for cleaning an object using a cleaning composition containing (A) a predetermined alkyl and / or alkenyl dimethylamine oxide, (B) an alkaline agent, (C) a predetermined branched fatty acid and / or a salt thereof, (D) water, and an optional sequestering agent, wherein the mass ratio of (A) / (C) is a predetermined value. Japanese Patent Laid-Open Publication No. 2010-150307 discloses a cleaning composition for food and beverage production equipment containing (A) an alkaline agent, (B) an anionic surfactant, (C) a predetermined alkyl dimethylamine oxide, (D) an aromatic sulfonate, (E) a water-soluble calcium compound, (F) a sequestering agent, and water in predetermined proportions. Japanese Patent Application Laid-Open Publication No. 2013-249383 discloses a cleaning composition containing (A) an alkaline agent, (B) an anionic surfactant, (C) a specified alkyldimethylamine oxide, and (D) a specified fatty acid or salt thereof having 6 to 14 carbon atoms in specified proportions, and the examples include a cleaning agent containing a fatty acid having 7 or 8 carbon atoms. Japanese Patent Application Laid-Open Publication No. 2021-181553 describes a cleaning composition containing a straight-chain fatty acid such as lauric acid or oleic acid, an alkyldimethylamine oxide, and an anionic surfactant, which has excellent foaming properties, storage stability, and dilution stability, and has excellent rinse-off properties that inhibit corrosion of aluminum materials. Japanese Patent Application Laid-Open Publication No. 2018-168328 describes a cleaning composition containing dimethylamine oxide, an alkaline agent, mainly iso-branched fatty acids, phosphonic acid, and water, which has good foaming properties, foam retention, and foam-off properties and is used in food manufacturing factories and kitchens. Japanese Patent Application Laid-Open Nos. 2019-73732 and 2018-203853 describe cleaning agents for hard surfaces that contain an amine oxide and a carboxylic acid or a salt thereof having a branched chain hydrocarbon group having from 11 to 12 carbon atoms, and that have excellent foam stability and rinsing properties.JP 2023-072672 A describes a detergent composition that has excellent stability, cleaning performance, and aluminum corrosion prevention properties and sufficient rinsing properties, and that contains (a) an alkaline agent, (b) a sulfonic acid surfactant having a hydrocarbon group containing from 11 to 24 carbon atoms, (c) a surfactant having a hydrocarbon group containing from 5 to 10 carbon atoms, (d) a branched fatty acid and / or a salt thereof in predetermined amounts, and optionally (e) one or more surfactants selected from amine oxides having a hydrocarbon group containing from 11 to 18 carbon atoms and anionic surfactants having a hydrocarbon group containing from 12 to 18 carbon atoms (excluding those corresponding to components (b) and (d)), and in which the mass ratio (c) / (b) of the content of component (c) to the content of component (b) is 1.0 or more and the mass ratio (e) / (b) of the content of component (e) to the content of component (b) is 0.5 or less.

[0004] SUMMARY OF THE INVENTION The prior art did not disclose any new technology for a cleaning composition that exhibits excellent foaming properties without compromising low-temperature stability or storage stability of an oxidizing halogen acid, while also allowing rinsing with a smaller amount of water. The present invention provides a cleaning composition that exhibits good storage stability under low-temperature conditions simulating winter and good storage stability of an oxidizing halogen acid under high-temperature conditions simulating summer, and that exhibits good foaming properties when used diluted and excellent foam rinsing properties, and a method for cleaning hard surfaces using the same.

[0005] The present invention relates to a detergent composition containing the following: 0.005% by mass or more and 5% by mass or less of the following component (a), 0.01% by mass or more and 15% by mass or less of the following component (b), 0.01% by mass or more and 15% by mass or less of the following component (c), 0.1% by mass or more and 10% by mass or less of the following component (d), 0.1% by mass or more and 8% by mass or less of the following component (e), and water: Component (a): a carboxylic acid and / or a salt thereof having a branched-chain hydrocarbon group having a total carbon number of 11 to 23, wherein the branched-chain hydrocarbon group has a main chain carbon number of 7 to 21 and all side chains branch at positions 3 or higher on the main chain; Component (b): an anionic surfactant (excluding component (a)); Component (c): an alkaline agent; Component (d): an oxidizing halogen acid and / or a salt thereof; and Component (e): a hydrotropic agent.

[0006] The present invention also relates to a method for cleaning hard surfaces, the method comprising: a step of mixing water with a detergent composition containing 0.005% by mass or more and 5% by mass or less of the component (a), 0.01% by mass or more and 15% by mass or less of the component (b), 0.01% by mass or more and 15% by mass or less of the component (c), 0.1% by mass or more and 10% by mass or less of the component (d), 0.1% by mass or more and 8% by mass or less of the component (e), and water; foaming the diluted solution obtained by mixing the diluted solution with water; a step of maintaining the foam for a certain period of time after the contact; and a step of rinsing with water after the maintenance.

[0007] The present invention provides a detergent composition that exhibits good storage stability under low-temperature conditions simulating winter and good storage stability of an oxidizing halogen acid under high-temperature conditions simulating summer, and that exhibits good foaming properties when used diluted and excellent foam rinsing properties, as well as a method for cleaning hard surfaces using the same.

[0008] Modes for Carrying Out the Invention The reasons why the cleaning composition of the present invention exhibits good storage stability under low-temperature conditions simulating winter and good storage stability of an oxidizing halogen acid under high-temperature conditions simulating summer, and exhibits good foaming when used diluted but excellent foam rinsing properties are not entirely clear, but are presumed to be as follows. The cleaning composition of the present invention contains, as component (a), a carboxylic acid and / or a salt thereof having a specific branched chain hydrocarbon group. When foamed using the cleaning composition of the present invention is brought into contact with a hard surface, component (a) can form a liquid condensed film, i.e., an oily domain, in the foam on the hard surface by rinsing with water, thereby making the foam film on the hard surface non-uniform and defoaming. It is believed that this is why the cleaning composition of the present invention exhibits excellent foam rinsing properties. The cleaning composition of the present invention also contains, as component (e), a hydrotrope. The hydrotrope interacts with the surfactants of components (a) and (b) to form aggregates, which is thought to improve the solubility of the surfactant in the solution and improve storage stability under low-temperature conditions. Furthermore, the cleaning composition of the present invention contains an oxidizing halogen acid as component (d), which decomposes by reacting with organic compounds such as surfactants (components (a) and (b)). However, the formation of the aggregates described above inhibits the reaction between the oxidizing halogen acid and the organic compounds, presumably improving the stability of the oxidizing halogen acid under high-temperature conditions. On the other hand, if the amount of hydrotrope added is too large, the hydrotrope itself will react with the oxidizing halogen acid, so an appropriate amount is effective. However, the present invention is not limited to this mechanism of action.

[0009] [Detergent Composition] <Component (a)> Component (a) of the detergent composition of the present invention is a carboxylic acid and / or a salt thereof having a branched-chain hydrocarbon group having a total carbon number of 11 to 23, wherein the main chain of the branched-chain hydrocarbon group has from 7 to 21 carbon atoms, and all side chains branch at positions 3 or higher on the main chain. The carboxylic acid and / or a salt thereof having a branched-chain hydrocarbon group of component (a) refers to a branched fatty acid and / or a salt thereof comprising one branched-chain hydrocarbon group and one carboxylic acid group, and is sometimes referred to as a branched aliphatic carboxylic acid and / or a salt thereof. Component (a) in the detergent composition of the present invention may have the same structure, or may be a mixture of carboxylic acids and / or salts thereof having branched-chain hydrocarbon groups at different branching positions. In the present invention, a mixture of two or more carboxylic acids and / or salts thereof having branched-chain hydrocarbon groups at different branching positions is preferred.

[0010] The carboxylic acid of component (a) is preferably a monocarboxylic acid from the viewpoint of improving rinsing properties. The salt of component (a) is preferably an alkali metal salt, more preferably at least one selected from the group consisting of a sodium salt and a potassium salt.

[0011] In the present invention, the branched-chain hydrocarbon group refers to a hydrocarbon group having a main chain and a side chain, and having one or more branched carbon atoms as described below. In the branched-chain hydrocarbon group, the hydrocarbon chain having the largest number of carbon atoms counting from the carbon atom bonded to the carboxylic acid is the main chain, and the hydrocarbon chains branched from the main chain and bonded to the main chain are side chains.

[0012] When two or more main chains are possible, i.e., when there are two or more hydrocarbon chains with the largest number of carbon atoms (hereinafter also referred to as the longest hydrocarbon chain), the main chain is determined in the following order: 1. The main chain is the one with the largest number of carbon atoms in the side chain branching off from the longest hydrocarbon chain. 2. Next, if the side chains branching off from the longest hydrocarbon chain have the same number of carbon atoms, the one with the largest number of side chains branching off from the longest hydrocarbon chain is determined as the main chain. 3. Next, if the number of side chains branching off from the longest hydrocarbon chain are the same, the one with the side chain on the carbon atom closest to the oxygen atom of the carboxylic acid, counting from the carbon atom bonded to the oxygen atom of the carboxylic acid, is determined as the main chain. 4. Next, if the positions of the carbon atoms with side chains closest to the oxygen atom of the carboxylic acid are the same, the one with the largest number of carbon atoms in the side chain closest to the oxygen atom of the carboxylic acid is determined as the main chain. Note that when two or more longest hydrocarbon chains have the same symmetrical structure, either one may be determined as the main chain.

[0013] From the viewpoint of improving rinsing performance, the total number of carbon atoms in the branched chain hydrocarbon group is 11 or more, preferably 15 or more, more preferably 16 or more, and 23 or less, preferably 22 or less, more preferably 21 or less, even more preferably 20 or less, still more preferably 19 or less, and still more preferably 18 or less.

[0014] In the branched-chain hydrocarbon group, the number of carbon atoms in the main chain is preferably 10 or more, more preferably 14 or more, even more preferably 15 or more, and preferably 22 or less, more preferably 21 or less, even more preferably 20 or less, still more preferably 19 or less, still more preferably 18 or less, and still more preferably 17 or less, from the viewpoint of improving rinsing performance. The number of carbon atoms in the main chain does not include the number of carbon atoms in the side chains. In addition, the number of carbon atoms in the longest main chain of the branched-chain hydrocarbon group is the number obtained by subtracting the 1 carbon atom of the methyl group, in most cases where there is one methyl group branch. For example, if the total number of carbon atoms in the branched-chain hydrocarbon group is 23, the maximum number of carbon atoms in the main chain will be 22.

[0015] In the branched-chain hydrocarbon group, the branching positions of all side chains are the third position or higher of the main chain, from the viewpoint of improving rinsing performance. Note that the carbon atom of the main chain bonded to the carboxylic acid group is counted as the first position, and the positions of the carbon atoms of the main chain are counted. In the branched-chain hydrocarbon group, the number of carbon atoms in the side chain is preferably 1 or more and preferably 10 or less, more preferably 5 or less, even more preferably 2 or less, and still more preferably 1, from the viewpoint of improving rinsing performance. Note that the number of carbon atoms in the side chain refers to the number of carbon atoms in one side chain bonded to the main chain. A side chain having 1 carbon atom is preferably a methyl group. In the branched-chain hydrocarbon group, the number of side chains is preferably 1 or more and preferably 3 or less, more preferably 2 or less, and still more preferably 1, from the viewpoint of improving rinsing performance. Note that the number of side chains refers to the number of side chains branching from the main chain, and the number of side chains does not change even if a side chain has a side chain branching from the side chain.

[0016] More specifically, preferred component (a) is a branched aliphatic primary monocarboxylic acid and / or a salt thereof, in which the total number of carbon atoms in the chain-branched hydrocarbon group is 11 or more, preferably 15 or more, more preferably 16 or more, and 23 or less, preferably 22 or less, more preferably 21 or less, even more preferably 20 or less, still more preferably 19 or less, and still more preferably 18 or less, and the number of carbon atoms in the main chain is preferably 10 or more, more preferably 14 or more, even more preferably 15 or more, and preferably 22 or less, more preferably 21 or less, even more preferably 20 or less, still more preferably 19 or less, and still more preferably 18 or less, and in which one to three, preferably one, methyl group is branched at the 3-position or higher of the main chain, and at the ω2-position or higher, or even at the ω3-position or higher from the main chain end. More specifically, the aliphatic primary monocarboxylic acid is a fatty acid and / or a salt thereof in which, when the main chain is considered to be linear, the side chain is located at the 3-position or higher (from the carbonyl carbon) of the main chain, the ω2-position or higher, and even the ω3-position or higher from the end of the main chain, the hydrocarbon group of the side chain is an alkyl group having from 1 to 3 carbon atoms, preferably an ethyl group or a methyl group, more preferably a methyl group, and the number of side chains is preferably from 1 to 3, and more preferably 1.

[0017] As described above, component (a) is preferably a mixture of carboxylic acids and / or salts thereof having chain-branched hydrocarbon groups with different branching positions. A preferred requirement for component (a) is that the chain-branched hydrocarbon group preferably has one to three side chains with from 1 to 3 carbon atoms, more preferably one side chain with one carbon atom, and the branching positions of the side chains are distributed at positions 3 or higher on the main chain and at positions ω2 or higher from the end of the main chain (hereinafter, sometimes referred to as branched fatty acids) and / or salts thereof. Specifically, as described above, component (a) is a mixture of branched aliphatic primary monocarboxylic acids (hereinafter sometimes referred to as methyl-branched fatty acids) and / or salts thereof, each of which has a total carbon number of 11 or more, preferably 15 or more, more preferably 16 or more, and 23 or less, preferably 22 or less, more preferably 21 or less, more preferably 20 or less, more preferably 19 or less, and more preferably 18 or less, in the main chain of which the carbon number is preferably 10 or more, more preferably 14 or more, even more preferably 15 or more, and preferably 22 or less, more preferably 21 or less, more preferably 20 or less, more preferably 19 or less, and more preferably 17 or less, with one to three, preferably one, methyl group branched at position 3 or higher of the main chain and at position ω2 or higher from the main chain end, with the branched aliphatic primary monocarboxylic acids having different branching positions (hereinafter sometimes referred to as methyl-branched fatty acids). The mixture is preferably a mixture of two or more, more preferably three or more, and preferably 12 or less, more preferably 11 or less. Component (a) can be a commercially available product, and branched fatty acids with different structures may be mixed. When producing it, the production method is not particularly limited. However, a mixture of fatty acids having methyl-branched chain-branched hydrocarbons with different branching positions can be prepared, for example, as a by-product in the process of polymerizing unsaturated fatty acids with one or more double bonds using an acid catalyst. For example, the production method described in Japanese Patent No. 3303947 can be used to obtain a mixture of saturated methyl-branched fatty acids with different branching positions. Whether the obtained branched fatty acids are a mixture of fatty acids with different branching positions can be confirmed by separation using GC-MS.For component (a), a mixture in which the side chains are branched at positions 3 or higher on the main chain is more likely to form the oily domains that are a feature of the present invention than a single component in which the side chains are branched at the same position, resulting in better rinsing properties of the foam of the cleansing composition. Also, from the viewpoint of production costs, this is preferable to a single component in which the side chains are branched at the same position. Furthermore, while the chain hydrocarbon group of component (a) is preferably a saturated hydrocarbon group, when unsaturated fatty acids are used as raw materials for production, unreacted unsaturated fatty acids, saturated straight-chain fatty acids, dimer acids, etc. may be mixed in. However, by-products may be reduced by purification, and such mixtures may be allowed to be mixed in to an extent that does not have an adverse effect. Furthermore, aliphatic carboxylic acids with different carbon numbers may be mixed in.

[0018] <Component (b)> The cleansing composition of the present invention contains an anionic surfactant as component (b), excluding component (a) and component (f) described below.

[0019] The anionic surfactant of component (b) is, for example, one or more selected from alkylbenzenesulfonic acids and their salts, alkanesulfonic acids and their salts, polyoxyalkylene alkyl or alkenyl ether sulfates and their salts, alkyl or alkenyl sulfates and their salts, internal olefinsulfonic acids and their salts, oxyalkylene-containing fatty acids and their salts, alkyl or alkenyl ether carboxylic acids and their salts, α-sulfofatty acids and their salts, N-acylamino acids and their salts, mono- or diester phosphates, and sulfosuccinates and their salts. The carbon number of the alkyl or alkenyl group of the anionic surfactant is, for example, from 8 to 22, preferably from 10 to 16, and more preferably from 12 to 14. The carbon number of the internal olefinsulfonic acid (excluding the carbon number of the counter ion of the anionic group) is preferably 8 or more, more preferably 12 or more, even more preferably 14 or more, and preferably 22 or less, more preferably 20 or less, and even more preferably 18 or less. In the polyoxyalkylene group of the anionic surfactant, the oxyalkylene group is preferably one or more groups selected from an oxyethylene group and an oxypropylene group, and an oxyethylene group is preferred. In the polyoxyalkylene group, the average number of moles of oxyalkylene groups added is, for example, from 0 to 10, preferably from 1 to 3. The counter ion of the anionic group of these anionic surfactants is, for example, one or more selected from alkali metal ions such as sodium ions and potassium ions; alkaline earth metal ions such as calcium ions and magnesium ions; ammonium ions; and alkanolamines having 1 to 3 alkanol groups each having 2 or 3 carbon atoms (e.g., monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, etc.).

[0020] From the viewpoint of improving foaming properties and detergency, component (b) is preferably one or more selected from alkylbenzenesulfonic acids and salts thereof, alkanesulfonic acids and salts thereof, alkyl or alkenyl sulfates and salts thereof, and polyoxyalkylene alkyl or alkenyl sulfates and salts thereof, and more preferably one or more selected from alkanesulfonic acids having a hydrocarbon group containing from 10 to 24 carbon atoms and salts thereof, alkylbenzenesulfonic acids having a hydrocarbon group containing from 10 to 24 carbon atoms and salts thereof, and alkyl or alkenyl sulfates having a hydrocarbon group containing from 10 to 24 carbon atoms and salts thereof (hereinafter referred to as component (b1)).

[0021] The hydrocarbon group of component (b1) is preferably an alkyl or alkenyl group having from 10 to 24 carbon atoms, more preferably an alkyl group having from 10 to 24 carbon atoms. Furthermore, the hydrocarbon group of component (b1) more preferably contains one secondary carbon atom linked to a sulfonic acid group or a benzene ring. However, when the hydrocarbon group of component (b1) is an alkylbenzene of alkylbenzenesulfonic acid or its salt, the alkyl group preferably has from 10 to 18 carbon atoms. The number of carbon atoms in the hydrocarbon group of component (b1) is preferably 10 or more, more preferably 12 or more, and preferably 22 or less, more preferably 20 or less. Component (b1) can be one or more selected from secondary alkanesulfonic acids and salts thereof, and linear alkylbenzenesulfonic acids and salts thereof. Therefore, component (b1) preferably contains a secondary alkyl group, and examples thereof include one or more selected from secondary alkanesulfonic acids and salts thereof in which a sulfonic acid group is bonded to the secondary carbon atom of the alkyl group, and linear alkylbenzenesulfonic acids and salts thereof in which the secondary carbon atom of the linear alkyl group is bonded to a benzene ring and the sulfonic acid group is bonded to the para-position relative to the linear alkyl group bonded to the benzene ring (hereinafter referred to as linear alkylbenzenesulfonic acids or salts thereof).

[0022] The alkyl or alkenyl group of the alkyl or alkenyl sulfate ester and salts thereof is preferably an alkyl or alkenyl group, preferably an alkyl group, having 10 or more carbon atoms, more preferably 12 or more, and preferably 22 or less, more preferably 20 or less, even more preferably 18 or less, still more preferably 16 or less, and still more preferably 14 or less. The alkyl or alkenyl group of the polyoxyalkylene alkyl or alkenyl sulfate ester and salts thereof is preferably an alkyl or alkenyl group, preferably an alkyl group, having 10 or more carbon atoms, more preferably 12 or more, and preferably 22 or less, more preferably 20 or less, even more preferably 18 or less, still more preferably 16 or less, and still more preferably 14 or less. The oxyalkylene group of the polyoxyalkylene alkyl or alkenyl sulfate ester and salts thereof is preferably one or more groups selected from oxyethylene groups and oxypropylene groups, more preferably oxyethylene groups, and the average number of moles of oxyalkylene groups added is preferably 1 or more, more preferably 2 or more, and preferably 20 or less, more preferably 15 or less, even more preferably 10 or less, and still more preferably 5 or less. The number of carbon atoms of the internal olefin sulfonic acid and its salt (excluding the number of carbon atoms of the counter ion of the anionic group) is preferably 8 or more, more preferably 12 or more, even more preferably 14 or more, still more preferably 16 or more, and preferably 22 or less, more preferably 20 or less, even more preferably 18 or less.

[0023] <Component (c)> The cleaning composition of the present invention contains an alkaline agent as component (c).

[0024] The alkali agent of component (c) is one or more selected from alkali metal hydroxides, alkali metal silicates, alkali metal carbonates, amine compounds, etc. The alkali metal hydroxide (hereinafter component (c-1)) is, for example, one or more selected from sodium hydroxide and potassium hydroxide. The alkali metal silicate (hereinafter component (c-2)) is, for example, one or more selected from sodium silicate and potassium silicate. The sodium silicate is one or more selected from sodium orthosilicate, sodium metasilicate, sodium silicate No. 1, sodium silicate No. 2, sodium silicate No. 3, sodium metasilicate pentahydrate, sodium metasilicate nonahydrate, etc. The potassium silicate is one or more selected from potassium orthosilicate, potassium metasilicate, potassium silicate A, potassium silicate B, potassium silicate C, etc. The alkali metal carbonate (hereinafter component (c-3)) is, for example, one or more selected from sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate. The amine compound [hereinafter, component (c-4)] is, for example, an alkanolamine having an alkanol group having from 2 to 4 carbon atoms, preferably having from 1 to 3 hydroxyethyl groups, and optionally having one alkyl group selected from a methyl group and an ethyl group. Note that when the detergent composition contains a hypochlorite as component (d), it is preferred that the detergent composition is substantially free of an amine compound.

[0025] From the viewpoint of improving cleaning properties, the component (c) is preferably at least one selected from the group consisting of sodium hydroxide and potassium hydroxide (component (c-1)) and sodium carbonate, potassium carbonate, sodium hydrogen carbonate, and potassium hydrogen carbonate (component (c-3)), and more preferably at least one selected from sodium hydroxide and potassium hydroxide.

[0026] In the present invention, it is preferable to mainly use an alkali metal hydroxide (c-1) as the alkaline agent for component (c). It is also possible to use an alkali metal silicate (c-2), but this is not preferred due to the occurrence of whitening after washing. Therefore, the content of component (c-2) in component (c) is preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 1% by mass or less, even more preferably 0.5% by mass or less, and may even be substantially 0% by mass. An alkali metal carbonate (c-3) can also be used, but from the viewpoint of low-temperature stability, the content of the alkali metal carbonate (c-3) in component (c) is preferably 50% by mass or less, more preferably 20% by mass or less, even more preferably 10% by mass or less, even more preferably 5% by mass or less, and may even be substantially 0% by mass. The content of the amine compound (c-4) in component (c) is preferably 1% by mass or less, more preferably 0.5% by mass or less, and even more preferably substantially 0% by mass, from the viewpoint of maintaining the available chlorine residual rate of the hypochlorite. Here, "substantially 0% by mass" means that the content of component (c-4) in the cleaning composition of the present invention is 0% by mass, regardless of the content of impurities and unreacted substances contained in components other than component (c-4) that are carried over.

[0027] <Component (d)> The cleaning composition of the present invention contains an oxidizing halogen acid and / or a salt thereof as component (d). The oxidizing halogen acid and / or a salt thereof as component (d) may be one or more selected from hypochlorous acid, hypobromous acid, chlorous acid, and salts thereof, and from the viewpoint of improving the bactericidal effect, hypochlorous acid and / or a salt thereof is preferred. Furthermore, the salt of the oxidizing halogen acid as component (d) is one or more selected from alkali metal salts of hypochlorous acid, alkali metal salts of hypobromous acid, and alkali metal salts of chlorous acid. From the viewpoint of improving foam stability, the component (d) is preferably an alkali metal salt of hypochlorous acid, more preferably sodium hypochlorite.

[0028] <Component (e)> The cleaning composition of the present invention contains a hydrotrope as component (e). Component (e) is preferably an alkylbenzenesulfonate salt having from 1 to 3 carbon atoms and from 1 to 3 alkyl groups, specifically one or more selected from toluenesulfonic acid, xylenesulfonic acid, cumenesulfonic acid, and salts thereof. The salt of component (e) is one or more selected from sodium salts, potassium salts, magnesium salts, etc. From the viewpoint of improving solution stability under low-temperature conditions and oxidizing halogen acid stability under high-temperature conditions, component (e) is preferably one or more selected from paratoluenesulfonic acid, metaxylenesulfonic acid, and salts thereof, more preferably paratoluenesulfonic acid and / or a salt thereof.

[0029] <Composition, etc.> From the viewpoint of improving rinsing performance, the detergent composition of the present invention contains component (a) in an amount of 0.005% by mass or more, preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and 5% by mass or less, preferably 3% by mass or less, more preferably 1% by mass or less, and even more preferably 0.5% by mass or less. In the present invention, the mass of component (a) is expressed as a value converted into a potassium salt.

[0030] From the viewpoint of improving foaming property and detergency, the detergent composition of the present invention contains component (b) in an amount of 0.01% by mass or more, preferably 0.1% by mass or more, more preferably 1% by mass or more, even more preferably 2% by mass or more, and 15% by mass or less, preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 4% by mass or less. In the present invention, the mass of component (b) is expressed as a value converted into a potassium salt.

[0031] In the detergent composition of the present invention, the mass ratio (b) / (a) of the content of the component (b) to the content of the component (a) is, from the viewpoint of improving rinsing performance, preferably 0.1 or more, more preferably 1 or more, even more preferably 5 or more, still more preferably 7 or more, and is preferably 100 or less, more preferably 50 or less, even more preferably 10 or less, and still more preferably 9 or less.

[0032] From the viewpoint of improving detergency, the detergent composition of the present invention contains component (c) in an amount of 0.01% by mass or more, preferably 0.1% by mass or more, more preferably 1% by mass or more, and 15% by mass or less, preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less. As described above, component (c) preferably contains component (c-1), an alkali metal hydroxide, as a main component, from the viewpoint of low-temperature stability. The content of the alkali metal hydroxide of component (c-1) in component (c) is preferably 50% by mass or more, more preferably 80% by mass or more, even more preferably 90% by mass or more, and even more preferably 98% by mass or more, and may be substantially 100% by mass. Here, "substantially 100% by mass" refers to a measured or calculated value. In the detergent composition of the present invention, components other than component (c-1) may affect alkalinity, but these components are not considered as alkaline agents, and the content of component (c-1) in component (c) is 100% by mass. The concentration of component (c-1), which is an alkali metal hydroxide as component (c), refers to the combination of alkali metal ions and hydroxy ions present in the cleaning composition, i.e., free alkali, and does not include combinations with other counter ions. For example, when an organic acid is separately contained, even if it is contained as an alkali metal hydroxide, it serves as a counter ion to the organic acid and is therefore not counted as an alkali metal hydroxide. Furthermore, when a hypochlorite is contained as component (d), an aqueous solution of 3% hydrogen peroxide is gradually added to reduce the hypochlorite until oxygen gas generation ceases, and then the total alkali metal concentration is measured, from which the concentrations considered to be counter ions of other components are subtracted to obtain the free alkali concentration, which is the alkali metal hydroxide concentration. The concentrations of other alkali agents are measured using known methods.

[0033] From the viewpoint of improving disinfecting properties, the detergent composition of the present invention contains component (d) in an amount of 0.1% by mass or more, preferably 1% by mass or more, more preferably 3% by mass or more, and 10% by mass or less, preferably 7% by mass or less, more preferably 5% by mass or less, of the detergent composition. In the present invention, the mass of component (d) is expressed as a value converted into a sodium salt.

[0034] From the viewpoint of improving the solution stability under low-temperature conditions and the stability of the oxidizing halogen acid under high-temperature conditions, the cleaning composition of the present invention contains component (e) in an amount of 0.1 mass % or more, preferably 0.5 mass % or more, more preferably 1 mass % or more, and even more preferably 2 mass % or more, and 8 mass % or less, preferably 5 mass % or less, and more preferably 3 mass % or less. In the present invention, the mass of component (e) is expressed as a value converted into a potassium salt.

[0035] In the cleaning composition of the present invention, the mass ratio (e) / (a) of the content of the component (e) to the content of the component (a) is preferably 0.1 or more, more preferably 0.5 or more, even more preferably 1 or more, still more preferably 3 or more, still more preferably 5 or more, still more preferably 6 or more, and is preferably 100 or less, more preferably 50 or less, still more preferably 10 or less, still more preferably 9 or less, and still more preferably 8 or less, from the viewpoint of improving the stability of the oxidizing halogen acid under high-temperature conditions and the rinsing performance.

[0036] From the viewpoint of improving low-temperature storage stability and foaming property, the detergent composition of the present invention preferably further contains, as component (f), a fatty acid and / or a salt thereof having from 8 to 10 carbon atoms. From the viewpoint of low-temperature storage stability and foaming property, the number of carbon atoms of the fatty acid of component (f) is preferably 8. The salt of component (f) is preferably an alkali metal salt, more preferably a sodium salt or potassium salt.

[0037] When the detergent composition of the present invention contains component (f), from the viewpoint of improving storage stability under low-temperature conditions in winter, the detergent composition contains component (f) in an amount of preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 1% by mass or more, still more preferably 2% by mass or more, still more preferably 3% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less. In the present invention, the mass of component (f) is expressed as a value converted into a potassium salt.

[0038] When the detergent composition of the present invention contains component (f), from the viewpoint of improving storage stability under low-temperature conditions in winter, the mass ratio (f) / (b) of the content of component (f) to the content of component (b) is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.5 or more, still more preferably 1 or more, and preferably 10 or less, more preferably 5 or less, and even more preferably 2 or less. Furthermore, when the detergent composition of the present invention contains an alkylbenzenesulfonate salt as component (b) and potassium ions are contained in the composition, the potassium salt of alkylbenzenesulfonic acid has a high Krafft point, and therefore the short-chain fatty acid of component (f) works more effectively, thereby improving the storage stability of the detergent composition of the present invention under low-temperature conditions.

[0039] From the viewpoint of foaming property, the cleaning composition of the present invention preferably contains a sequestering agent as component (g). More specifically, component (g) is one or more selected from phosphoric acid, phosphonic acid, aminocarboxylic acid, dicarboxylic acid, tricarboxylic acid, oxycarboxylic acid, carboxylic acid polymers, and salts thereof. These salts also include hydrates (hydrated salts). Furthermore, component (g) is preferably a sequestering agent whose acid form has a molecular weight of 500 or less.

[0040] Specific examples of the phosphoric acid and its salts include one or more selected from pyrophosphoric acid, tripolyphosphoric acid, metaphosphoric acid, phytic acid, and salts thereof. Specific examples of the phosphonic acid and its salts include one or more selected from hydroxyethanediphosphonic acid, aminotrimethylenephosphonic acid, ethylenediaminetetramethylenephosphonic acid, phosphonobutanetricarboxylic acid, and salts thereof. Specific examples of the aminocarboxylic acid and its salts include one or more selected from edetic acid (EDTA), nitrilotriacetic acid (NTA), hydroxyethyliminodiacetic acid (HIDA), 3-hydroxy-2,2'-iminodisuccinate tetrasodium (HIDS), diethylenetriaminepentaacetic acid (DPTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), dihydroxyethylglycine (DHEG), L-glutamic acid diacetate (GLDA), methylglycine diacetate (MGDA), and salts thereof. The dicarboxylic acid and its salt are specifically one or more selected from oxalic acid, malonic acid, succinic acid, glutaric acid, phthalic acid, isophthalic acid, and salts thereof. The tricarboxylic acid and its salt are specifically one or more selected from propanetricarboxylic acid, cyclohexanetricarboxylic acid, and salts thereof. The oxycarboxylic acid and its salt are specifically one or more selected from citric acid, malic acid, tartaric acid, gluconic acid, oxalic acid, maleic acid, malonic acid, succinic acid, aspartic acid, glutamic acid, and salts thereof. The carboxylic acid polymer and its salt are specifically one or more selected from acrylic-maleic acid copolymers, polyacrylic acid polymers, and salts thereof. However, component (g) excludes compounds corresponding to component (h) described below.

[0041] The component (g) is a component having a pK Ｃａ (Calcium stability constant, Ca stability constant) of component (g) is preferably greater than 3.0. Ｃａ was measured by the following method. Ｃａ Measurement method: As a buffer solution, KOH was used at 0.1M, NH ４ Cl 0.1M, NH ４Prepare an aqueous solution containing 0.1M CaOH. Prepare all sample solutions using this buffer solution. All sample solutions are measured at a temperature of 20°C. ２＋ For example, the concentration was measured using an ion meter 920A manufactured by Orion Co., Ltd. and Ca ２＋ An ion electrode can be used. First, the relationship between calcium chloride concentration and the electrode potential is determined, and a calibration curve is created. －２ mol / L solution of the sample compound (component (g)) 5.36 × 10 －４ mol / L solution is prepared. 1 ml of calcium chloride solution is added to 100 ml of the prepared sample compound solution, and the mixture is stirred for 5 minutes. ２＋ The concentration is Ca ２＋ The sample compound is measured using an ion electrode. ２＋ Assuming that a 1:1 chelate complex is formed, the pK Ｃａ (Calcium stability constant, Ca stability constant) is calculated.

[0042]

[0043] Among these, from the viewpoint of effectively achieving both excellent low-temperature storage stability and good foaming, component (g) is preferably one or more selected from phosphoric acid, phosphonic acid, and salts thereof, and more preferably phosphonic acid and / or a salt thereof. More specifically, component (g) is preferably at least one selected from sodium aminotrimethylene phosphonate, potassium aminotrimethylene phosphonate, sodium 1-hydroxyethylidene-1,1-diphosphonate, potassium 1-hydroxyethylidene-1,1-diphosphonate, sodium 2-phosphonobutane-1,2,4-tricarboxylate, potassium 2-phosphonobutane-1,2,4-tricarboxylate, sodium ethylenediaminetetramethylene phosphonate, potassium ethylenediaminetetramethylene phosphonate, sodium diethylenetriaminepentamethylene phosphonate, and potassium diethylenetriaminepentamethylene phosphonate, and of these, at least one selected from phosphonobutanetricarboxylic acid (also referred to as PBTA), hydroxyethanediphosphonic acid (also referred to as HEDP), and salts thereof is even more preferable, and is also excellent from the viewpoint of foam stability when diluted and used in a detergent composition containing component (d).

[0044] When the cleaning composition of the present invention contains component (g), from the viewpoint of improving foaming property when used diluted, the cleaning composition contains component (g) in an amount of preferably 0.05% by mass or more, more preferably 0.5% by mass or more, even more preferably 2% by mass or more, and preferably 10% by mass or less, more preferably 7% by mass or less, even more preferably 5% by mass or less, and still more preferably 4% by mass or less. In the present invention, the mass of component (g) is expressed as a value converted into a potassium salt.

[0045] The cleaning agent composition of the present invention preferably contains, as component (h), a high molecular weight polymer containing structural units derived from a carboxylic acid or salt thereof (h-1) having a reactive unsaturated group containing from 3 to 6 carbon atoms, such as a maleic acid-isobutylene copolymer or a salt thereof, and structural units derived from a polymerizable olefin (h-2) having from 4 to 12 carbon atoms, which may have an aryl group. Component (h) may be a high molecular weight polymer containing structural units derived from (h-1) and structural units derived from (h-2), wherein the ratio of the structural units derived from (h-1) to the structural units derived from (h-2) constituting the high molecular weight polymer [(h-1) / (h-2)], in terms of the molar ratio of the monomers, is from 10 / 90 to 90 / 10. Component (h) is a preferred component from the viewpoint of further improving rinsing performance. One or more types of component (h) may be used. Hereinafter, a carboxylic acid or a salt thereof having a reactive unsaturated group having from 3 to 6 carbon atoms will be referred to as component (h-1), and a polymerizable olefin having from 4 to 12 carbon atoms which may have an aryl group will be referred to as component (h-2).

[0046] Examples of component (h-1) include one or more selected from maleic acid, maleic anhydride, acrylic acid, methacrylic acid, fumaric acid, itaconic acid, crotonic acid, citraconic acid, and salts thereof. Dicarboxylic acids with known acid anhydride structures are preferably polymerized as acid anhydrides to synthesize polymeric copolymers, followed by hydrolysis for use. From the viewpoints of foam retention and quick rinsing, the structural units derived from component (h-1) are preferably structural units derived from monomers containing one or more selected from the group consisting of acrylic acid and its salts, maleic acid and its salts, and maleic anhydride, and more preferably structural units derived from monomers containing maleic acid. Examples of salts of component (h-1) include one or more selected from sodium salts and potassium salts. The salt of the polymer of component (h) may be formed using a salt-type compound as a monomer, or may be formed by neutralization after copolymerization.

[0047] The olefin of component (h-2) having from 4 to 12 carbon atoms and optionally having an aryl group can be one or more selected from butylene, isobutylene, diisobutylene, pentene, hexene, and styrene, preferably one or more selected from butylene, isobutylene, diisobutylene, pentene, hexene, and styrene, more preferably one or more selected from isobutylene, diisobutylene, and styrene, and even more preferably diisobutylene. The number of carbon atoms of the olefin which may have an aryl group is preferably from 4 to 8, from the viewpoint of rinsing ability.

[0048] Component (h) is a high molecular weight polymer containing structural units derived from component (h-1) and structural units derived from component (h-2). In component (h), the molar ratio of structural units derived from component (h-1) to structural units derived from component (h-2) constituting component (h) [(h-1) / (h-2)] is preferably 10 / 90 or more, more preferably 15 / 85 or more, and even more preferably 25 / 75 or more, from the viewpoint of further enhancing low-temperature stability and rinsing ease; and is preferably 90 / 10 or less, more preferably 85 / 15 or less, and even more preferably 75 / 25, from the viewpoint of suppressing re-foaming due to dilution during rinsing. This molar ratio [(h-1) / (h-2)] may be the molar ratio of the monomers used in the synthesis of component (h), unless the component (h) is a known product. Furthermore, when determining the molar ratio from a high molecular weight polymer, it can be determined by detecting the pyrolysis product of the copolymer using pyrolysis gas chromatography (PGC). Furthermore, in the component (h), from the viewpoint of further improving rinsing properties, the total content of the structural units derived from the component (h-1) and the structural units derived from the component (h-2) constituting the component (h) is preferably 90 mol% or more, more preferably 95 mol% or more, even more preferably 98 mol% or more, and preferably 100 mol% or less, more preferably 100 mol% or less, even more preferably 100 mol% or less, and the component (h) is preferably a copolymer consisting essentially of structural units derived from the component (h-1) and structural units derived from the component (h-2). In the component (h), the total content of the structural units derived from the component (h-1) and the structural units derived from the component (h-2) constituting the component (h) may be the total content of the component (h-1) and the component (h-2) relative to the total amount of monomers used in the synthesis of the component (h). Furthermore, the component (h) may be a salt, for example, one selected from a sodium salt and a potassium salt.

[0049] From the viewpoints of foaming property, foam retention, and rinsing property, the weight-average molecular weight of component (h) is preferably 1,000 or more, more preferably 5,000 or more, even more preferably 10,000 or more, and preferably 100,000 or less, more preferably 90,000 or less, even more preferably 80,000 or less, still more preferably 50,000 or less, and still more preferably 30,000 or less. The weight-average molecular weight of the high molecular weight polymer of component (h), for example, a diisobutylene-maleic acid copolymer, is a value determined by gel permeation chromatography using a mixture of acetonitrile and 0.1 M aqueous sodium chloride solution (acetonitrile:aqueous sodium chloride solution (volume ratio) = 30:70) as a developing solvent and polyethylene glycol as a standard substance.

[0050] When the cleaning composition of the present invention contains component (h), from the viewpoints of further improving foam breaking property when diluted by rinsing and further suppressing re-foaming, the content of component (h) in the cleaning composition is preferably 0.1% by mass or more, more preferably 0.4% by mass or more, even more preferably 0.8% by mass or more, and from the viewpoints of further improving the stability of the oxidizing halogen acid or a salt thereof and the solution stability, the content of component (h) is preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 5% by mass or less, and still more preferably 3% by mass or less. Unless otherwise specified, the mass of component (h) specified in this specification is the mass converted into the sodium salt.

[0051] In addition to components (a) to (h), the detergent composition of the present invention may optionally contain other components (excluding those corresponding to components (a) to (h)), such as organic solvents such as butyl carbitol (also known as diethylene glycol monobutyl ether), phenoxyethanol, or ethylene glycol; dispersants such as polyacrylic acid or a salt thereof; pH adjusters such as lactic acid or citric acid; thickeners; viscosity adjusters; fragrances; colorants; antioxidants; preservatives; bleaching agents; and bleach activators, within the scope of the effects of the present invention.

[0052] The cleaning composition of the present invention is a liquid cleaning composition containing water. That is, the cleaning composition of the present invention preferably contains water as the balance other than the components (a) to (h) and other optional components. The cleaning composition of the present invention may contain water in an amount of preferably 60% by mass or more, more preferably 65% ​​by mass or more, even more preferably 70% by mass or more, still more preferably 75% by mass or more, still more preferably 80% by mass or more, and preferably less than 94% by mass, more preferably 93% by mass or less. The water used may preferably be deionized water, sterilized deionized water, or the like.

[0053] From the viewpoint of improving detergency, the pH of the cleaning composition of the present invention at 25°C is preferably 11.0 or more, more preferably 12.0 or more, even more preferably 13.0 or more, and still more preferably 13.2 or more, and is 14 or less. The pH at 25°C can be measured by a glass electrode method. Specifically, the pH of the cleaning composition of the present invention at 25°C is measured by the pH measurement method described below.

[0054] <pH Measurement Method> A pH measurement composite electrode (HORIBA pH / Ion Meter F-23) is connected to a pH meter, and the power is turned on. A saturated potassium chloride aqueous solution (3.33 mol / L) is used as the internal solution of the pH electrode. Next, a pH 6.86 standard solution (neutral phosphate standard solution), a pH 9.18 standard solution (borate standard solution), and a pH 12.0 standard solution (saturated calcium hydroxide standard solution) are each filled into a 100 mL beaker, and the beaker is immersed in a thermostatic bath at 25°C for 30 minutes. The pH measurement electrode is immersed in the thermostatically adjusted standard solution for 3 minutes, and calibration is performed in the order of pH 6.86 → pH 9.18 → pH 12.0. The sample to be measured (the cleaning composition of the present invention) is adjusted to 25°C, and the electrode of the pH meter is immersed in the sample, and the pH is measured after 1 minute. The pH at 25° C. of a diluted solution obtained by diluting the cleaning composition of the present invention with water can also be measured by the same method. In this case, in the above description, the cleaning composition of the present invention should be read as a diluted solution obtained by diluting the cleaning composition of the present invention with water.

[0055] The detergent composition of the present invention may be used by diluting with water. For example, the detergent composition of the present invention may be a detergent composition that is used by diluting with water having a hardness of preferably 0.1° DH or more, more preferably 0.2° DH or more, even more preferably 0.3° DH or more, still more preferably 0.5° DH or more, still more preferably 1° DH or more, and still more preferably 2° DH or more, and preferably 20° DH or less, more preferably 10° DH or less, even more preferably 8° DH or less, and still more preferably 6° DH or less, when used. This water is preferably water containing calcium ions.

[0056] Water hardness (°DH) in this specification refers to German hardness, which measures the concentration of calcium and magnesium in water in terms of CaCO ３ This refers to a converted concentration of 1 mg / L (ppm) = approximately 0.056°DH (1°DH = 17.8 ppm). The German hardness of water used for cleaning can be adjusted, for example, based on a value calculated from the type and amount of hardness component added. When water with unknown hardness, such as tap water, is used for cleaning, the German hardness of the water can be determined by the chelate titration method using disodium salt of ethylenediaminetetraacetic acid, as described below. A specific method for measuring the German hardness of water in this specification is shown below.

[0057] <Method for Measuring German Water Hardness> [Reagents] 0.01 mol / L EDTA·2Na solution: 0.01 mol / L aqueous solution of disodium ethylenediaminetetraacetate (titration solution, 0.01 M EDTA-Na2, manufactured by Sigma-Aldrich) Universal BT indicator (product name: Universal BT, manufactured by Dojindo Laboratories) Ammonia buffer solution for hardness measurement (solution prepared by dissolving 67.5 g of ammonium chloride in 570 mL of 28 w / v% aqueous ammonia and adding deionized water to bring the total volume to 1000 mL) [Measuring German Water Hardness] (1) Using a volumetric pipette, place 20 mL of sample water into a conical beaker. (2) Add 2 mL of ammonia buffer solution for hardness measurement. (3) Add 0.5 mL of Universal BT indicator. Confirm that the solution after addition is reddish purple. (4) While shaking the conical beaker well, add 0.01 mol / L EDTA·2Na solution dropwise from the burette, and the end point of the titration is when the sample water turns blue. (5) Calculate the total hardness using the following formula: Hardness (°DH) = T x 0.01 x F x 56.0774 x 100 / A T: Titration volume (mL) of 0.01 mol / L EDTA·2Na solution A: Sample volume (20 mL, volume of sample water) F: Factor of 0.01 mol / L EDTA·2Na solution

[0058] The cleaning composition of the present invention is foamed for use on the hard surfaces of hard items, and is preferably used for food processing equipment and / or cooking equipment. That is, the present invention is a foaming cleaning composition for hard surfaces, and is preferably a foaming cleaning composition for food processing equipment and / or cooking equipment. The cleaning composition of the present invention is suitable for cleaning hard surfaces containing aluminum, such as hard surfaces of aluminum alloys and aluminum metals. In the present invention, the term "food processing equipment and / or cooking equipment" refers to equipment and facilities used in processing and / or cooking food in food processing factories. Examples of such equipment include net conveyors, freezers, slicers, rice polishers, etc. Furthermore, examples of such equipment include floors, walls, and workbenches.

[0059] The cleaning composition of the present invention may be prepared by mixing two or more pre-compositions, each of which includes a pre-composition A containing component (a) and a pre-composition B containing at least a portion of the alkaline agent (c) and component (d), optionally with a pre-composition C containing the other components described above. (When pre-compositions A and B are mixed, the essential components of component (b), the remainder of component (c), and component (e) may be contained in either pre-composition A or pre-composition B, respectively. When pre-compositions A to C are mixed, each of the essential components may be contained in either pre-composition A or pre-composition B.) The cleaning composition of the present invention may also be a combination or set of pre-compositions. For example, the cleaning composition may be prepared by adding and mixing pre-composition A containing component (a) as a rinse aid to pre-composition B containing the remaining essential components (b), component (c), component (d), and component (e) and water so that the concentrations of each component satisfy the requirements for the cleaning composition of the present invention. Pre-composition A may also contain some or all of components (b) and (e), and a portion of component (c). Pre-composition A may be in the form of a powder, solid, or liquid, preferably a liquid composition, and more preferably containing water. That is, the cleaning composition of the present invention may be a kit of a combination of pre-composition A, pre-composition B, and an optional pre-composition C. Note that other components (f), (g), and (h) may be optional components of any pre-composition as long as they do not affect the composition.

[0060] [Method for Cleaning Hard Surfaces] The present invention provides a method for cleaning hard surfaces, comprising the steps of: mixing a detergent composition containing 0.005% by mass or more and 5% by mass or less of the (a) component, 0.01% by mass or more and 15% by mass or less of the (b) component, 0.01% by mass or more and 15% by mass or less of the (c) component, 0.1% by mass or more and 10% by mass or less of the (d) component, and 0.1% by mass or more and 8% by mass or less of the (e) component; and water; foaming the diluted solution obtained by mixing the detergent composition with water; contacting the diluted solution with a target hard surface; maintaining the foam for a certain period of time after the contact; and rinsing with water after the maintenance. In the method for cleaning hard surfaces of the present invention, the detergent composition is the same as the detergent composition of the present invention, and the embodiments described for the detergent composition of the present invention can be applied as appropriate. The hard surface is the same as the embodiment described for the detergent composition of the present invention. The present invention also relates to a method for cleaning hard surfaces using foam generated by foaming the detergent composition. The method for cleaning hard surfaces of the present invention can be appropriately applied with the embodiments described for the detergent composition of the present invention.

[0061] In the method for cleaning a hard surface of the present invention, the detergent composition is diluted with water at a dilution ratio of 2 times or more, preferably 5 times or more, more preferably 20 times or more, and 200 times or less, preferably 100 times or less to obtain the diluted solution.

[0062] In the method for cleaning hard surfaces of the present invention, the detergent composition is diluted with water having a hardness of preferably 0.1° DH or more, more preferably 0.2° DH or more, even more preferably 0.3° DH or more, still more preferably 0.5° DH or more, still more preferably 1° DH or more, still more preferably 2° DH or more, and preferably 20° DH or less, more preferably 10° DH or less, even more preferably 8° DH or less, and still more preferably 6° DH or less. Tap water can be used as the water for dilution.

[0063] In the method for cleaning a hard surface of the present invention, the diluted solution obtained by mixing the detergent composition with water contains, from the viewpoint of improving foaming property and cleaning property, preferably 0.0005% by mass or more, more preferably 0.005% by mass or more, even more preferably 0.01% by mass or more of component (a), and preferably 0.5% by mass or less, more preferably 0.3% by mass or less, even more preferably 0.1% by mass or less, and still more preferably 0.05% by mass or less of component (a).

[0064] In the method for cleaning a hard surface of the present invention, the diluted solution obtained by mixing the detergent composition with water contains component (b) in an amount of preferably 0.0001% by mass or more, more preferably 0.001% by mass or more, even more preferably 0.01% by mass or more, still more preferably 0.05% by mass or more, and preferably 1% by mass or less, more preferably 0.7% by mass or less, and even more preferably 0.5% by mass or less, from the viewpoint of the cleansing and rinsing properties of the modified oil.

[0065] In the method for cleaning a hard surface of the present invention, the diluted solution obtained by mixing the detergent composition with water contains, from the viewpoint of improving cleaning performance, preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.05% by mass or more of component (c), and preferably 1.5% by mass or less, more preferably 1% by mass or less, even more preferably 0.5% by mass or less, and still more preferably 0.1% by mass or less of component (c).

[0066] In the method for cleaning a hard surface of the present invention, the diluted solution obtained by mixing the detergent composition with water contains, from the viewpoint of improving the bactericidal effect, preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.2% by mass or more, still more preferably 0.3% by mass or more, and preferably 1% by mass or less, more preferably 0.7% by mass or less, and even more preferably 0.5% by mass or less of component (d).

[0067] In the method for cleaning a hard surface of the present invention, the diluted solution obtained by mixing the detergent composition with water contains component (e) in an amount of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, and preferably 0.8% by mass or less, more preferably 0.5% by mass or less, even more preferably 0.3% by mass or less, from the viewpoint of improving foaming properties and rinsing properties.

[0068] In the method for cleaning a hard surface of the present invention, when the diluted solution obtained by mixing the detergent composition with water contains component (f), from the viewpoint of improving foaming properties and rinsing properties, the diluted solution contains component (f) in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, and preferably 1.5% by mass or less, more preferably 1% by mass or less, and even more preferably 0.5% by mass or less.

[0069] In the method for cleaning a hard surface of the present invention, when the diluted solution obtained by mixing the detergent composition with water contains component (g), from the viewpoint of improving foaming property, the diluted solution contains component (g) in an amount of preferably 0.005% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, and preferably 1% by mass or less, more preferably 0.7% by mass or less, and even more preferably 0.5% by mass or less.

[0070] In the method for cleaning a hard surface of the present invention, when the diluted solution obtained by mixing the detergent composition with water contains component (h), the diluted solution contains component (h) in an amount of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, from the viewpoints of further improving foam breaking property and further suppressing re-foaming when dilution by rinsing is advanced; and preferably 0.8% by mass or less, more preferably 0.5% by mass or less, even more preferably 0.3% by mass or less, and still more preferably 0.1% by mass or less, from the viewpoints of further improving the stability of the oxidizing halogen acid or a salt thereof.

[0071] In the diluted solution, the mass ratio (b) / (a) of the content of the component (b) to the content of the component (a), i.e., (e) / (a) of the content of the component (e) to the content of the component (a), and the mass ratio (f) / (b) of the content of the component (f) to the content of the component (b) are within the same ranges as those described above for the cleaning composition of the present invention.

[0072] In the method for cleaning a hard surface of the present invention, the pH at 25°C of a diluted solution obtained by mixing the detergent composition with water is preferably 10.0 or more, more preferably 11.0 or more, even more preferably 12.0 or more, from the viewpoint of improving detergency, and is preferably 13.5 or less, more preferably 13.0 or less, even more preferably 12.8 or less.

[0073] In the hard surface cleaning method of the present invention, the time for which the diluted solution is foamed and brought into contact with the target hard surface and the foam is maintained is preferably 1 minute or more from the viewpoint of the mechanism and operability of each device, and from the same viewpoint, preferably 60 minutes or less, more preferably 45 minutes or less, even more preferably 30 minutes or less, even more preferably 20 minutes or less, even more preferably 15 minutes or less, even more preferably 10 minutes or less, and even more preferably 5 minutes or less. Furthermore, in the hard surface cleaning method of the present invention, the time for which the foam is maintained is preferably 10 minutes or more, more preferably 15 minutes or more, even more preferably 20 minutes or less from the viewpoint of cleaning performance, and from the same viewpoint, preferably 60 minutes or less, more preferably 45 minutes or less, and even more preferably 30 minutes or less. It is preferable to leave the diluted solution to maintain the foam, but it is also possible to add a small amount of water, etc.

[0074] After the foam is maintained for a certain period of time, the target hard surface is rinsed with water. The temperature of the rinsing water is preferably 10°C or higher, more preferably 20°C or higher, and preferably 70°C or lower, more preferably 50°C or lower. Tap water can be used as the rinsing water, and may be heated to adjust the water temperature to the above-mentioned preferred range. The detergent composition has excellent foam-removal properties during rinsing, and requires less rinsing water than conventional detergent compositions, which is economically advantageous and also significantly contributes to reducing the workload (work time and number of workers) and the environmental load.

[0075] Specifically, the method for cleaning hard surfaces of the present invention can be suitably used as a method for cleaning food processing equipment and / or cooking equipment, which includes the following steps 1 to 3. However, the method for cleaning hard surfaces of the present invention is not limited to this specific example.

[0076] Step 1: A step of pre-diluting a cleaning composition containing 0.005% by mass or more and 5% by mass or less of the (a) component, 0.01% by mass or more and 15% by mass or less of the (b) component, 0.01% by mass or more and 15% by mass or less of the (c) component, 0.1% by mass or more and 10% by mass or less of the (d) component, 0.1% by mass or more and 8% by mass or less of the (e) component, and water, with water at a dilution ratio of 2 to 200 times (preferably 5 to 200 times), and spraying the cleaning composition in the form of foam onto food processing equipment and / or cooking equipment while diluting the cleaning composition; Step 2: A step of maintaining the foam for a certain period of time; Step 3: A step of rinsing the food processing equipment and / or cooking equipment with water.

[0077] In step 1, the cleaning composition is the same as the cleaning composition of the present invention, and the embodiments described for the cleaning composition of the present invention can be applied as appropriate. In step 1, the cleaning composition is pre-diluted with water at a dilution ratio of 2 to 200 (preferably 5 to 200) and then sprayed in the form of foam. Alternatively, the cleaning composition is placed in a dedicated container and directly connected to a water supply via a hose or the like, and mixed while being diluted and sprayed in the form of foam. The pre-dilution and simultaneous dilution can also be combined to spray the diluted solution of the cleaning composition in the form of foam. The dilution ratio in step 1 is 2 or more, preferably 5 or more, more preferably 20 or more, and 200 or less, preferably 100 or less.

[0078] In Step 1, the diluted solution of the detergent composition to be sprayed in the form of foam onto the hard surface contains, in order to improve rinsing performance, preferably 0.0005% by mass or more, more preferably 0.005% by mass or more, even more preferably 0.01% by mass or more of component (a), and preferably 0.5% by mass or less, more preferably 0.3% by mass or less, even more preferably 0.1% by mass or less, and still more preferably 0.05% by mass or less of component (a).

[0079] Furthermore, from the viewpoint of improving foaming properties and cleaning properties, the diluted solution of the detergent composition to be sprayed onto a hard surface in the form of foam contains component (b) in an amount of preferably 0.0001% by mass or more, more preferably 0.001% by mass or more, even more preferably 0.01% by mass or more, still more preferably 0.05% by mass or more, and preferably 1% by mass or less, more preferably 0.7% by mass or less, and even more preferably 0.5% by mass or less.

[0080] Furthermore, from the viewpoint of improving cleaning performance, the diluted solution of the detergent composition to be sprayed in the form of foam onto a hard surface contains component (c) in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.05% by mass or more, and preferably 1.5% by mass or less, more preferably 1% by mass or less, even more preferably 0.5% by mass or less, and still more preferably 0.1% by mass or less.

[0081] Furthermore, from the viewpoint of improving the bactericidal effect, the diluted solution of the cleaner composition to be sprayed in the form of foam onto a hard surface contains component (d) in an amount of preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.2% by mass or more, still more preferably 0.3% by mass or more, and preferably 1% by mass or less, more preferably 0.7% by mass or less, and even more preferably 0.5% by mass or less.

[0082] Furthermore, from the viewpoint of improving foaming properties and rinsing properties, the diluted solution of the detergent composition to be sprayed onto a hard surface in the form of foam contains component (e) in an amount of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, and preferably 0.8% by mass or less, more preferably 0.5% by mass or less, and even more preferably 0.3% by mass or less.

[0083] When the diluted solution of the detergent composition to be sprayed onto a hard surface in the form of foam contains the component (f), from the viewpoint of improving foaming properties and rinsing properties, the diluted solution contains the component (f) in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, and preferably 1.5% by mass or less, more preferably 1% by mass or less, and even more preferably 0.5% by mass or less.

[0084] When the diluted solution of the detergent composition to be sprayed onto a hard surface in the form of foam contains the component (g), from the viewpoint of improving foaming property, the diluted solution contains the component (g) in an amount of preferably 0.005% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, and preferably 1% by mass or less, more preferably 0.7% by mass or less, and even more preferably 0.5% by mass or less.

[0085] When the diluted solution of the cleaner composition to be sprayed in the form of foam onto a hard surface contains the component (h), the diluted solution contains the component (h) in an amount of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, from the viewpoints of further improving foam breaking property and further suppressing re-foaming when dilution by rinsing is advanced, and the diluted solution contains the component (h) in an amount of preferably 0.8% by mass or less, more preferably 0.5% by mass or less, even more preferably 0.3% by mass or less, and still more preferably 0.1% by mass or less, from the viewpoints of further improving the stability of the oxidizing halogen acid or a salt thereof.

[0086] In the diluted solution, the mass ratio (b) / (a) of the content of the component (b) to the content of the component (a), the mass ratio (e) / (a) of the content of the component (e) to the content of the component (a), and the mass ratio (f) / (b) of the content of the component (f) to the content of the component (b) are within the same ranges as those described above for the cleaning composition of the present invention.

[0087] Here, the water used to dilute the detergent composition is generally assumed to be water containing hardness components, such as tap water. From the viewpoints of continuously spraying good foam and improving aluminum corrosion prevention, the hardness of the water used to dilute the detergent composition is preferably 0.1° DH or more, more preferably 0.2° DH or more, even more preferably 0.3° DH or more, still more preferably 0.5° DH or more, still more preferably 1° DH or more, still more preferably 2° DH or more, and preferably 20° DH or less, more preferably 10° DH or less, still more preferably 8° DH or less, and still more preferably 6° DH or less. From the viewpoint of improving detergency, the pH of the diluted solution of the detergent composition at 25° C. is preferably 10.0 or more, more preferably 11.0 or more, even more preferably 12.0 or more, and preferably 13.5 or less, more preferably 13.0 or less, and still more preferably 12.8 or less.

[0088] A preferred embodiment of spraying the diluted solution of the cleaning composition in the form of foam is to fill a dedicated foam washer with an appropriate amount of the diluted solution prepared by diluting the cleaning composition with water to a predetermined ratio, and then spray the diluted solution in the form of foam by mixing with external air / compressed air. The content of the cleaning composition in the diluted solution (cleaning liquid) prepared by diluting the cleaning composition is preferably 0.02 to 10% by mass, more preferably 0.02 to 8% by mass, and even more preferably 0.02 to 6% by mass. For large treatment areas, such as production lines in food processing factories, foam washer machines (e.g., "SCU-HF" manufactured by Spraying Co., Ltd., "KF-100" or "KF-200" manufactured by Kao Corporation, or "Foam iT" manufactured by C.B.S. Co., Ltd.) are preferably used. For small treatment areas, such as cooking utensils such as cutting boards, hand sprayers capable of intermittently generating foam, such as trigger sprayers or foamer sprayers, are preferably used.

[0089] It is preferable to spray the detergent in a foam form without intermittence in step 1. Here, "without intermittence" spraying means, for example, using a foam washer, the detergent continues to be sprayed in a foam form continuously (for example, for 5 seconds or more) while the tap is opened with a lever, switch, or the like, and this is distinguished from "intermittent" spraying, for example, using a hand sprayer such as a trigger sprayer or a foam sprayer, in which spraying begins when the lever is pulled and then stops instantly.

[0090] The embodiment of continuously spraying foam using a foam washer is particularly effective when the area and size of the food processing equipment and / or cooking equipment to be cleaned are large. The food processing equipment and / or cooking equipment are the same as those described for the liquid detergent composition of the present invention.

[0091] When using a foam washer, the foaming ratio (ratio of foam volume (mL) / foam mass (g)) is preferably 3 times or more, more preferably 5 times or more, even more preferably 10 times or more, and preferably 50 times or less, more preferably 40 times or less, and even more preferably 30 times or less. The pressure (gauge pressure) during spraying is preferably 0.1 MPa or more, more preferably 0.2 MPa or more, and preferably 1 MPa or less, more preferably 0.8 MPa or less, and even more preferably 0.5 MPa or less. When using a hand sprayer such as a trigger sprayer or foamer sprayer, the foaming ratio is preferably 2 times or more, more preferably 5 times or more, even more preferably 10 times or more, and preferably 30 times or less, more preferably 25 times or less, and even more preferably 15 times or less.

[0092] Step 2 is a step of spraying the diluted solution of the cleaning composition in the form of foam in Step 1, adhering the foam to food processing equipment and / or cooking equipment, and maintaining the foam for a certain period of time. From the viewpoints of the mechanism and operability of each device, the foam-maintaining time in Step 2 is preferably 1 minute or more, and from the same viewpoints, preferably 60 minutes or less, more preferably 45 minutes or less, even more preferably 30 minutes or less, still more preferably 20 minutes or less, still more preferably 15 minutes or less, still more preferably 10 minutes or less, and still more preferably 5 minutes or less. From the viewpoint of improving detergency, the foam-maintaining time in Step 2 is preferably 10 minutes or more, more preferably 15 minutes or more, and still more preferably 20 minutes or more, and from the same viewpoints, preferably 60 minutes or less, more preferably 45 minutes or less, and still more preferably 30 minutes or less.

[0093] The time for which the foam is maintained in Step 2 varies depending on the dilution ratio of the detergent composition in the diluted solution obtained by diluting the detergent composition and the scene of use, and is not particularly limited. For example, when the dilution ratio is 2 to 50 times (preferably 10 to 50 times), the time for which the foam is maintained is preferably 1 to 60 minutes, and when the dilution ratio is 50 to 200 times, the foam is preferably stably maintained for 1 to 10 minutes.

[0094] In step 2, it is preferable to leave the mixture as it is while the foam is being maintained, but it is also possible to add a small amount of water or the like.

[0095] After the foam is maintained for a certain period of time, in step 3, the food processing equipment and / or cooking equipment is rinsed with water. The temperature of the rinsing water is preferably 10°C or higher, more preferably 20°C or higher, and preferably 70°C or lower, more preferably 50°C or lower. Tap water can be used as the rinsing water, and may be heated to adjust the temperature to the above-mentioned preferred range. Generally, rinsing is performed manually using a hose or the like. The detergent composition of the present invention has excellent foam-removal properties during rinsing and requires less rinsing water than conventional detergent compositions, which is economically advantageous and also significantly contributes to reducing the workload (work time and number of workers) and the environmental load.

[0096] Examples Components (a), (b), (c), (d), (e), (f) and (g) used in the Examples, Comparative Examples and Composition Examples are shown below.

[0097] <Component (a)> Me-ISA-K: Potassium hydroxide neutralized isostearic acid synthesized by the following method

[0098] -Method for synthesizing Me-ISA-K 400 g of a fatty acid mixture (Lunac SO-90L, manufactured by Kao Corporation, composition: palmitic acid 1%, linoleic acid 3%, octadecenoic acid (oleic acid) 89%, hexadecenoic acid 2%, stearic acid 1%, and others), 32 g of H-mordenite zeolite (HSZ-620HOA, manufactured by Tosoh Corporation: SiO2 / Al2O3 [molar ratio] = 15, average pore diameter 6.7-7 Å), and 8 g of water were placed in an autoclave, the atmosphere in the container was replaced with nitrogen, and the mixture was stirred. The autoclave was heated to 280°C and subjected to a pressure of 18 kgf / cm 2 The reaction mixture was cooled, taken out, and the zeolite was filtered off. The mixture was distilled under reduced pressure to obtain 347.6 g of a monomer acid (branched unsaturated fatty acid). The monomer acid and 3.5 g of 5% Pd / C were placed in an autoclave and heated to 20 kgf / cm. 2The mixture was heated to 150°C under a hydrogen atmosphere and reacted for 3 hours. After completion of the reaction, it was cooled and the catalyst was filtered off. The crude branched fatty acids thus obtained were subjected to a conventional solvent fractionation method, i.e., adding hexane in an amount approximately twice the weight of the crude branched fatty acids, cooling to -15°C, filtering off the crystals, and then purifying by distilling off the hexane from the mother liquor to obtain 276.7 g of methylheptadecanoic acid (hereinafter sometimes referred to as methylheptadecanoic acid), in which a methyl group is branched from a linear primary heptadecanoic acid. The resulting methylheptadecanoic acid is a monocarboxylic acid having a branched hydrocarbon group with a main chain of 16 and one side chain with one carbon atom, with the side chain branching positions distributed between positions 3 and 15 of the main chain. The acid value (AV), saponification value (SV), and iodine value (IV) according to JIS K3331 were as follows: AV=162.7, SV=177.7, IV=9.1

[0099] <Component (b)> LAS-K: linear dodecylbenzenesulfonic acid (Neopelex GS, manufactured by Kao Corporation) neutralized with potassium hydroxide SAS: secondary sodium alkane sulfonate having 14 to 17 carbon atoms (Latemul PS, manufactured by Kao Corporation) C16IOS: internal olefin sulfonate sodium salt having 16 carbon atoms (the one described in paragraph 0100 of JP 2021-120423 A is used) C18IOS: internal olefin sulfonate sodium salt having 18 carbon atoms (the one described in paragraph 0099 of JP 2021-120423 A is used) SDS: lauryl sulfate sodium salt (Emal 0, manufactured by Kao Corporation) C10AS: decyl sulfate sodium salt (Emal 3F, manufactured by Kao Corporation) ES (3): Polyoxyethylene alkyl ether sulfate sodium salt having an alkyl group carbon number of 12 and an average number of ethyleneoxy groups added of 3 (EMAL 327, manufactured by Kao Corporation)

[0100] <Component (c)> KOH: potassium hydroxide (liquid caustic potash (48%), manufactured by Toagosei Co., Ltd.) NaOH: sodium hydroxide (liquid caustic soda (48%), manufactured by Tosoh Corporation) <Component (d)> NaClO: sodium hypochlorite (sodium hypochlorite, manufactured by Tosoh Corporation) <Component (e)> PTS-K: paratoluenesulfonic acid (PTS MT-70, manufactured by Meiyu Sangyo Co., Ltd.) neutralized with potassium hydroxide MXS-K: metaxylenesulfonic acid (SXA-60, manufactured by Itochu Chemical Frontier Corporation) neutralized with potassium hydroxide <Component (f)> C8FA-K: caprylic acid (Lunac 8-98(E), manufactured by Kao Corporation) neutralized with potassium hydroxide <Component (g)> PBTC-5K: 2-phosphonobutane-1,2,4-tricarboxylic acid (PH-430, manufactured by Chelest Co., Ltd.) neutralized with potassium hydroxide <component (h)> DIBMA: diisobutylene maleic acid copolymer (Accusol 460ND, manufactured by Rohm and Hass Co., Ltd., copolymerization ratio maleic acid / diisobutylene=1 / 1, weight average molecular weight 10,000)

[0101] (1) Method for producing detergent composition A stirrer piece and purified water were placed in a beaker, and while stirring the purified water, component (a), component (b), component (e), component (f), and optionally component (g) were added in this order so that the contents would be as shown in Table 1. Stirring was continued, and then component (c) was added. Next, component (d) was added to this mixture, and stirring was continued until the mixture reached room temperature, thereby producing a detergent composition. The pH at 25°C of the detergent compositions of each Example and Comparative Example was as shown in Table 1. The content (mass%) of each component in Table 1 is all based on the active ingredient.

[0102] (2) Rinsing Performance Evaluation A 1000 mL measuring cylinder was charged with 5 g of a 20-fold diluted solution of the detergent composition shown in Table 1 with 4° dH hard water, which was foamed using a pump foamer (Biore Hand Soap, manufactured by Kao Corporation), and the initial foam volume (mL) was measured. After measuring the foam volume, 4° dH hard water was then added to the measuring cylinder by shower at a rate of 50 mL / min, and the amount of water added when the foam volume reached 0 mL was recorded as the amount of rinsing water (mL). The results are shown in Table 1.

[0103] (3) Evaluation of Low-Temperature Storage Stability 80 mL of a cleaning composition shown in Table 1 was placed in a 100 mL polypropylene bottle (Good Boy, AS ONE) and stored at -5°C for 10 days. After storage, a visual evaluation was performed, and a rating of A was given when the cleaning composition was uniform and transparent, and a rating of B when the liquid phase separated. The results are shown in Table 1.

[0104] (4) High-Temperature Storage Stability Evaluation (Evaluation of Available Chlorine Residual Rate) 80 mL of the cleaning composition shown in Table 1 was placed in a 100 mL polypropylene bottle (Good Boy, AS ONE) and stored for 10 days in an environment at 50°C. The available chlorine concentration of the cleaning composition after storage was measured by the iodine titration method described below, and the available chlorine residual rate was calculated. [Iodine Titration Method] Arbitrary amounts of the cleaning composition before and after storage were weighed and placed in 100 mL beakers as measurement samples, diluted with 50 mL of deionized water, and 10 mL of a 10% aqueous potassium iodide solution and dilute sulfuric acid were added and stirred. The liberated iodine was titrated with a 0.1 N sodium thiosulfate solution to measure the titration amount. If the color change was difficult to discern, a starch aqueous solution may be added as desired. The available chlorine concentration was calculated from the titration amount using the following formula, and the available chlorine residual rate was calculated from the available chlorine concentrations of the sample before and after storage using the following formula. The results are shown in Table 1. The higher the residual rate of available chlorine, the better the storage stability of the oxidizing halogen acid of component (d) under high temperature conditions simulating summer. Effective chlorine concentration (%) = [(titration amount) × 1.003 × 0.3546] ÷ [sample amount] Effective chlorine residual rate (%) = effective chlorine concentration ÷ effective chlorine concentration before storage × 100

[0105]

[0106] <Composition Examples> Composition examples of the cleaning composition of the present invention are shown in Table 2. All of the composition examples have good storage stability of the oxidizing halogen acid under low temperature conditions simulating winter and high temperature conditions simulating summer, and also have good foaming properties when used diluted and excellent foam rinsing properties.

[0107]

Claims

1. A detergent composition comprising from 0.005% by mass to 5% by mass of the following component (a), from 0.01% by mass to 15% by mass of the following component (b), from 0.01% by mass to 15% by mass of the following component (c), from 0.01% by mass to 15% by mass of the following component (d), from 0.1% by mass to 10% by mass of the following component (e), and from 0.1% by mass to 8% by mass of the following component (e), and water: Component (a): a carboxylic acid and / or a salt thereof having a branched-chain hydrocarbon group having a total carbon number of from 11 to 23, wherein the branched-chain hydrocarbon group has from 7 to 21 main chain carbon atoms and all side chains branch at positions 3 or higher on the main chain; Component (b): an anionic surfactant (excluding component (a)); Component (c): an alkaline agent; Component (d): an oxidizing halogen acid and / or a salt thereof; and Component (e): a hydrotropic agent.

2. The detergent composition according to claim 1, further comprising 0.01% by mass to 15% by mass of the following component (f): Component (f): a fatty acid having from 8 to 10 carbon atoms and / or a salt thereof.

3. The cleaning composition according to claim 2, wherein the mass ratio (f) / (b) of the content of component (f) to the content of component (b) is 0.1 or more and 10 or less.

4. The cleaning composition according to any one of claims 1 to 3, further comprising 0.05% by mass to 10% by mass of the following component (g): Component (g): Sequestering agent 5. The cleaning composition according to any one of claims 1 to 4, which is a liquid cleaning composition.

6. The cleaning composition according to any one of claims 1 to 5, which is for use on hard surfaces and is foamed for use.

7. A method for cleaning hard surfaces, comprising the steps of: mixing a detergent composition containing the following component (a) at 0.005% by mass or more and 5% by mass or less: the following component (b) at 0.01% by mass or more and 15% by mass or less: the following component (c) at 0.01% by mass or more and 15% by mass or less: the following component (d) at 0.1% by mass or more and 10% by mass or less: the following component (e) at 0.1% by mass or more and 8% by mass or less; and water; foaming the diluted solution obtained by mixing the detergent composition with water; bringing the diluted solution into contact with a target hard surface; maintaining the foam for a certain period of time after the contact; and rinsing with water after maintaining the foam. Component (a): a carboxylic acid and / or a salt thereof having a branched chain hydrocarbon group with a total carbon number of 11 to 23, wherein the main chain carbon number of the branched chain hydrocarbon group is 7 to 21, and all side chains are branched at positions 3 or higher on the main chain; Component (b): an anionic surfactant (excluding component (a)); Component (c): an alkaline agent; Component (d): an oxidizing halogen acid and / or a salt thereof; Component (e): a hydrotropic agent; 8. The method for cleaning a hard surface according to claim 7, wherein the diluted solution is obtained by diluting the cleaning composition with water at a dilution ratio of 2 to 200 times.

9. A method for cleaning a hard surface according to claim 7 or 8, wherein the diluted solution contains 0.0005% by mass or more and 0.5% by mass or less of component (a) and 0.01% by mass or more and 0.8% by mass or less of component (e).

10. The method for cleaning a hard surface according to any one of claims 7 to 9, wherein the water used to dilute the cleaning composition and the water used to rinse after retaining the foam are tap water.

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