Detergent composition

Abstract

To provide a detergent composition which has good storage stability under low temperature conditions in assumption of winter and good storage stability of an oxidizing halogen acid under high temperature conditions in assumption of summer and has excellent foam rinsing properties while having good foaming properties when diluted and used and to provide a method for cleaning a hard surface using the detergent composition.SOLUTION: There is provided a detergent composition which comprises 0.005 mass% or more and 5 mass% or less of the following component (a), 0.01 mass% or more and 15 mass% or less of the following component (b), 0.01 mass% or more and 15 mass% or less of the following component (c), 0.1 mass% or more and 10 mass% or less of the following component (d), 0.1 mass% or more and 8 mass% or less of the following component (e) and water. The component (a): a carboxylic acid having a chain-like branched hydrocarbon group having a total of 11 to 23 carbon atoms and / or a salt thereof, in which the number of carbon atoms in the main chain of the chain-like branched hydrocarbon group is 7 to 21 and the branching positions of all side chains are a 3-position or higher on the main chain. The component (b): an anionic surfactant (excluding the component (a)). The component (c): an alkaline agent. The component (d): an oxidizing halogen acid and / or a salt thereof. The component (e): a hydrotrope agent.SELECTED DRAWING: None

Description

[Technical Field]

[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. [Background technology]

[0002] Food processing plants regularly clean the equipment and facilities used in food processing and / or cooking 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 facilities include floors, walls, and work tables. Because these cleaning targets are large and often have complex, intricately intertwined parts, foam cleaning, in which a cleaning agent is foamed and applied to the target, is typically used as an efficient cleaning method. Furthermore, because these foaming cleaners handle food, they are required to have a high cleaning effect as a measure against food poisoning and other pathogens, and because they are used in diluted form, they contain relatively high concentrations of inorganic alkaline agents and hypochlorous acid, etc. In this case, there is a concern that inorganic alkaline agents may precipitate at low temperatures in winter, and maintaining the storage stability of hypochlorite salts in summer becomes an issue. In addition, foaming cleaners not only have excellent foaming properties when diluted, but also require a large amount of rinsing water, so from an environmentally friendly perspective, technology is required that has good defoaming properties and can reduce the amount of rinsing water required.

[0003] Patent Document 1 discloses a method for cleaning an object using a detergent 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. Patent Document 2 discloses a cleaning composition for food and beverage manufacturing equipment, which contains (A) an alkaline agent, (B) an anionic surfactant, (C) a specified alkyldimethylamine oxide, (D) an aromatic sulfonate, (E) a water-soluble calcium compound, (F) a sequestering agent, and water in specified proportions. Patent Document 3 discloses a detergent composition containing (A) an alkaline agent, (B) an anionic surfactant, (C) a specified alkyldimethylamine oxide, and (D) a specified fatty acid having 6 to 14 carbon atoms or a salt thereof in specified proportions, and describes in the examples detergents containing fatty acids having 7 or 8 carbon atoms. Patent Document 4 describes a detergent composition that contains a straight-chain fatty acid such as lauric acid or oleic acid, alkyldimethylamine oxide, and an anionic surfactant, and that has excellent foaming properties, storage stability, and dilution stability, as well as excellent foam-removal properties after rinsing, which inhibits corrosion of aluminum materials. Patent Document 5 describes a cleaning composition that contains dimethylamine oxide, an alkaline agent, mainly iso-branched fatty acids, phosphonic acid, and water, has good foaming properties, foam retention, and foam removal, and is used in food and beverage manufacturing factories and kitchens. Patent Documents 6 and 7 describe hard surface cleaners that contain an amine oxide and a carboxylic acid or its salt having a branched chain hydrocarbon group having from 11 to 12 carbon atoms, and that have excellent foam stability and rinsing properties. Patent Document 8 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 a predetermined amount, and optionally (e) one or more surfactants selected from an amine oxide having a hydrocarbon group containing from 11 to 18 carbon atoms and an anionic surfactant having a hydrocarbon group containing from 12 to 18 carbon atoms (excluding those corresponding to components (b) and (d)), wherein 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. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-199619 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-150307 [Patent Document 3] Japanese Patent Application Laid-Open No. 2013-249383 [Patent Document 4] Patent Publication No. 2021-181553 [Patent Document 5] Japanese Patent Application Laid-Open No. 2018-168328 [Patent Document 6] Japanese Patent Application Publication No. 2019-73732 [Patent Document 7] Japanese Patent Application Publication No. 2018-203853 [Patent Document 8] Japanese Patent Publication No. 2023-072672 Summary of the Invention [Problem to be solved by the invention]

[0005] The prior art did not disclose any new technology regarding a cleaning composition that has excellent foaming properties without impairing low-temperature stability or the storage stability of an oxidizing halogen acid, and that can be rinsed with a smaller amount of water. 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 but also excellent foam rinsing properties, and a method for cleaning hard surfaces using the same. [Means for solving the problem]

[0006] The present invention relates to a detergent composition containing the following component (a) in an amount of 0.005% by mass or more and 5% by mass or less, the following component (b) in an amount of 0.01% by mass or more and 15% by mass or less, the following component (c) in an amount of 0.01% by mass or more and 15% by mass or less, the following component (d) in an amount of 0.1% by mass or more and 10% by mass or less, the following component (e) in an amount of 0.1% by mass or more and 8% by mass or less, and water: 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): Anionic surfactant (excluding component (a)) (c) Ingredient: Alkaline agent Component (d): Oxidizing halogen acid and / or its salt (e) Ingredient: Hydrotropic agent

[0007] The present invention also relates to 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 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), and 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; and 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 maintaining the foam. [Effects of the Invention]

[0008] 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. DETAILED DESCRIPTION OF THE INVENTION

[0009] The reason why the detergent composition of the present invention has good storage stability under low-temperature conditions simulating winter and good storage stability of the oxidizing halogen acid under high-temperature conditions simulating summer, and has good foaming property when used diluted and excellent foam rinsing properties is not entirely clear, but is presumed to be as follows. The detergent 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 foam generated using the detergent 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. This is thought to be why the detergent composition of the present invention has excellent foam rinsing properties. The cleaning composition of the present invention also contains a hydrotrope as component (e). The hydrotrope interacts with the surfactants (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. The cleaning composition of the present invention also contains an oxidizing halogen acid as component (d). The oxidizing halogen acid decomposes upon reaction with organic compounds, such as the surfactants (a) and (b). The formation of the aggregates described above inhibits the reaction between the oxidizing halogen acid and the organic compounds, which is thought to improve the stability of the oxidizing halogen acid under high-temperature conditions. However, if too much hydrotrope is added, 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.

[0010] [Cleaning 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 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. The carboxylic acid and / or salt thereof having a branched chain hydrocarbon group of component (a) refers to a branched fatty acid and / or salt thereof consisting of one branched chain hydrocarbon group and one carboxylic acid group, and is sometimes referred to as a branched aliphatic carboxylic acid and / or 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.

[0011] 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 sodium salts and potassium salts.

[0012] 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. Among the branched chain hydrocarbon groups, the hydrocarbon chain with the largest carbon number counted from the carbon atom bonded to the carboxylic acid is the main chain, and the hydrocarbon chains that branch off from the main chain and bond to it are side chains.

[0013] When two or more main chains are considered, that is, when there are two or more hydrocarbon chains with the largest number of carbon atoms (hereinafter also referred to as the longest hydrocarbon chains), the main chains are determined in the following order. 1. The side chain branching off from the longest hydrocarbon chain with the larger number of carbon atoms is considered the main chain. 2. Next, if the number of carbon atoms in the side chains branching off from the longest hydrocarbon chain is the same, the chain with the greater number of side chains branching off from the longest hydrocarbon chain is designated as the main chain. 3. Next, if the number of side chains branching off from the longest hydrocarbon chain is the same, the main chain is 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. 4. Next, if the positions of the carbon atoms having side chains closest to the oxygen atom of the carboxylic acid are the same, the side chain with the larger number of carbon atoms closest to the oxygen atom of the carboxylic acid is considered to be the main chain. When two or more longest hydrocarbon chains have the same symmetrical structure, either one may be used as the main chain.

[0014] 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.

[0015] In order to improve rinsing performance, the number of carbon atoms in the main chain of the branched-chain hydrocarbon group 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. 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, since most often 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.

[0016] In the branched chain hydrocarbon group, the branching positions of all side chains are the third or higher positions 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. 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. 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 one carbon atom is preferably a methyl group. In the branched-chain hydrocarbon group, from the viewpoint of improving rinsing performance, the number of side chains is preferably 1 or more and preferably 3 or less, more preferably 2 or less, and even more preferably 1. 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.

[0017] A more specific 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 or salt thereof in which, when the main chain is considered to be linear, the side chain is located at the 3rd position or higher (from the carbonyl carbon) of the main chain, the ω2nd position or higher from the end of the main chain, and even the ω3rd position or higher, the hydrocarbon group of the side chain is an alkyl group having 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 1 to 3, and preferably 1.

[0018] 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. As a preferred requirement, component (a) is preferably a mixture of carboxylic acids and / or salts thereof having chain-branched hydrocarbon groups with different branching positions (hereinafter sometimes referred to as branched fatty acids) in which the chain-branched hydrocarbon group preferably has one to three side chains with 1 to 3 carbon atoms, more preferably one side chain with 1 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. 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 its main chain of 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, in which one to three, preferably one, methyl group is 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 commercially available, and branched fatty acids with different structures can 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. With respect to 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. This results in superior rinsing properties of the foam of the cleansing composition, and is also preferable from the viewpoint of production costs to obtaining a single component in which the side chains are branched at the same position. Furthermore, the chain hydrocarbon group of component (a) is preferably a saturated hydrocarbon group, but when unsaturated fatty acids are used as the raw material for production, unreacted unsaturated fatty acids, saturated straight-chain fatty acids, dimer acids, etc. may be mixed in. However, by reducing by-products through purification, they may be mixed in to an extent that does not have an adverse effect. Aliphatic carboxylic acids with different carbon numbers may also be mixed in.

[0019] <(b) Component> The cleaning composition of the present invention contains an anionic surfactant as component (b), excluding component (a) and component (f) described below.

[0020] The anionic surfactant of component (b) is, for example, one or more selected from alkylbenzenesulfonic acids and salts thereof, alkanesulfonic acids and salts thereof, polyoxyalkylene alkyl or alkenyl ether sulfates and salts thereof, alkyl or alkenyl sulfates and salts thereof, internal olefinsulfonic acids and salts thereof, fatty acids having an oxyalkylene group and salts thereof, alkyl or alkenyl ether carboxylic acids and salts thereof, α-sulfofatty acids and salts thereof, N-acylamino acids and salts thereof, mono- or diester phosphates, and sulfosuccinates and salts thereof. The alkyl or alkenyl group of the anionic surfactant has, for example, 8 or more and 22 or less carbon atoms, preferably 10 or more and 16 or less carbon atoms, and more preferably 12 or more and 14 or less carbon atoms. The number of carbon atoms of the internal olefin sulfonic acid (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, and preferably 22 or less, more preferably 20 or less, even more preferably 18 or less. The polyoxyalkylene group of the anionic surfactant is preferably one or more groups selected from an oxyethylene group and an oxypropylene group, and is preferably an oxyethylene group. In the polyoxyalkylene group, the average number of moles of oxyalkylene groups added is, for example, 0 to 10, preferably 1 to 3. The counter ion of the anionic group of these anionic surfactants is at least one selected from alkali metal ions such as sodium ion and potassium ion; alkaline earth metal ions such as calcium ion and magnesium ion; ammonium ion; and alkanolamines having 1 to 3 alkanol groups each having 2 or 3 carbon atoms (e.g., monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, etc.).

[0021] From the viewpoint of improving foaming properties and cleaning properties, 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, and alkylbenzenesulfonic acids having a hydrocarbon group containing from 10 to 24 carbon atoms and salts thereof (hereinafter referred to as component (b1)).

[0022] The hydrocarbon group of component (b1) is preferably an alkyl or alkenyl group having 10 to 24 carbon atoms, more preferably an alkyl group having 10 to 24 carbon atoms. Furthermore, the alkyl group 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 10 to 18 carbon atoms. The hydrocarbon group of component (b1) preferably has 10 or more carbon atoms, more preferably 12 or more carbon atoms, and preferably 22 or less, more preferably 20 or less carbon atoms. The component (b1) may be at least one selected from secondary alkanesulfonic acids and salts thereof, and linear alkylbenzenesulfonic acids and salts thereof. Therefore, the 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 or 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).

[0023] The alkyl or alkenyl group of the alkyl or alkenyl sulfate ester and salts thereof is preferably an alkyl or alkenyl group having 10 or more carbon atoms, more preferably 12 or more carbon atoms, and preferably 22 or less, more preferably 20 or less, even more preferably 18 or less, and still more preferably 16 or less carbon atoms, and preferably an alkyl group. The alkyl or alkenyl group of the polyoxyalkylene alkyl or alkenyl sulfate ester and salts thereof is preferably an alkyl or alkenyl group having 10 or more carbon atoms, more preferably 12 or more carbon atoms, and preferably 22 or less, more preferably 20 or less, even more preferably 18 or less, and still more preferably 16 or less carbon atoms, and preferably an alkyl group. The oxyalkylene group of the polyoxyalkylene alkyl or alkenyl sulfate ester and salts thereof is preferably one or more groups selected from an oxyethylene group and an oxypropylene group, more preferably an oxyethylene group, and the average number of moles of the oxyalkylene group added is preferably 1 or more, more preferably 2 or more, and preferably 20 or less, more preferably 15 or less, and even more preferably 10 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, and preferably 22 or less, more preferably 20 or less, even more preferably 18 or less.

[0024] <(c) component> The cleaning composition of the present invention contains an alkaline agent as component (c).

[0025] The alkaline agent of component (c) is at least one selected from alkali metal hydroxides, alkali metal silicates, alkali metal carbonates, amine compounds, and the like. The alkali metal hydroxide (hereinafter referred to as component (c-1)) is, for example, one or more selected from sodium hydroxide and potassium hydroxide. Examples of the alkali metal silicate (hereinafter, component (c-2)) include one or more selected from sodium silicate and potassium silicate. The sodium silicate is one or more selected from sodium orthosilicate, sodium metasilicate, No. 1 sodium silicate, No. 2 sodium silicate, No. 3 sodium silicate, sodium metasilicate pentahydrate, and sodium metasilicate nonahydrate. The potassium silicate is one or more selected from potassium orthosilicate, potassium metasilicate, potassium A silicate, potassium B silicate, and potassium C silicate. The alkali metal carbonate (hereinafter referred to as component (c-3)) is, for example, one or more selected from sodium carbonate, potassium carbonate, sodium hydrogen carbonate, and potassium hydrogen carbonate. 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 preferable that the detergent composition is substantially free of an amine compound.

[0026] From the viewpoint of improving cleaning properties, component (c) is preferably one or more selected from component (c-1) sodium hydroxide and potassium hydroxide, and component (c-3) sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate, and more preferably one or more selected from sodium hydroxide and potassium hydroxide.

[0027] In the present invention, the alkaline agent (c) is preferably primarily an alkali metal hydroxide (c-1). While an alkali metal silicate (c-2) can also be used, this is undesirable due to the whitening phenomenon that occurs after washing. Therefore, the content of the (c-2) component in the (c) component 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. However, from the viewpoint of low-temperature stability, the content of the alkali metal carbonate (c-3) in the (c) component 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 the (c) component 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.

[0028] <(d) component> 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 its salt of component (d) may be one or more selected from hypochlorous acid, hypobromous acid, chlorous acid, and their salts, with hypochlorous acid and / or its salts being preferred from the viewpoint of improving the disinfecting effect. Furthermore, the oxidizing halogen acid salt of 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, component (d) is preferably an alkali metal salt of hypochlorous acid, more preferably sodium hypochlorite.

[0029] <(e) component> The detergent composition of the present invention contains a hydrotrope as component (e). Component (e) is preferably an alkylbenzenesulfonate having from 1 to 3 alkyl groups having from 1 to 3 carbon atoms, 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 the solution stability under low-temperature conditions and the stability of the oxidizing halogen acid under high-temperature conditions, component (e) is preferably one or more selected from paratoluenesulfonic acid, metaxylenesulfonic acid, and salts thereof, and more preferably paratoluenesulfonic acid and / or a salt thereof.

[0030] <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 the potassium salt.

[0031] From the viewpoint of improving foaming properties 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 the potassium salt.

[0032] In the detergent composition of the present invention, the mass ratio (b) / (a) of the content of component (b) to the content of 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.

[0033] 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, even more preferably 98% by mass or more, and may be substantially 100%. 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, if an organic acid is separately contained, even if it is contained as an alkali metal hydroxide, it will not be counted as an alkali metal hydroxide because it will serve as a counter ion to the organic acid. Furthermore, if hypochlorite is contained as component (d), a 3% aqueous solution of hydrogen peroxide is gradually added to reduce the hypochlorite until oxygen gas generation ceases, and then the total alkali metal concentration is measured. The free alkali, calculated by subtracting the concentrations of counter ions of other components, is the alkali metal hydroxide concentration. The concentrations of other alkali agents are measured using known methods.

[0034] 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 the sodium salt.

[0035] From the viewpoint of improving the solution stability at low temperatures and the stability of the oxidizing halogen acid at high temperatures, the cleaning composition of the present invention contains component (e) in an amount of 0.1% by mass or more, preferably 0.5% by mass or more, more preferably 1% by mass or more, and 8% by mass or less, preferably 5% by mass or less, more preferably 3% by mass or less. In the present invention, the mass of component (e) is expressed as a value converted into the potassium salt.

[0036] 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, and is preferably 100 or less, more preferably 50 or less, even more preferably 10 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 improving rinsing performance.

[0037] From the viewpoint of improving low-temperature storage stability and foaming properties, the detergent composition of the present invention preferably further contains, as component (f), a fatty acid having from 8 to 10 carbon atoms and / or a salt thereof. The number of carbon atoms in the fatty acid of component (f) is preferably 8 from the viewpoints of low-temperature storage stability and foaming properties. The salt of component (f) is preferably an alkali metal salt, more preferably a sodium salt or potassium salt.

[0038] When the detergent composition of the present invention contains the component (f), from the viewpoint of improving storage stability under low-temperature conditions in winter, the detergent composition contains the 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, and 15% by mass or less, preferably 10% by mass or less, more preferably 5% by mass or less. In the present invention, the mass of component (f) is expressed as a value converted into the potassium salt.

[0039] When the detergent composition of the present invention contains the component (f), the mass ratio (f) / (b) of the content of the component (f) to the content of the component (b) is, from the viewpoint of improving storage stability under low-temperature conditions in winter, preferably 1 / 10 or more, more preferably 1 / 5 or more, even more preferably 1 / 2 or more, still more preferably 1 / 1 or more, and is preferably 10 / 1 or less, more preferably 5 / 1 or less, and even more preferably 2 / 1 or less. Furthermore, when the detergent composition of the present invention contains an alkylbenzenesulfonate as component (b) and also contains potassium ions in the composition, the potassium salt of alkylbenzenesulfonate has a high Krafft point, so that the short-chain fatty acid of component (f) acts more effectively, thereby improving the storage stability of the detergent composition of the present invention under low-temperature conditions.

[0040] From the viewpoint of foaming properties, the detergent composition of the present invention 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). Component (g) is preferably a sequestering agent having an acid form molecular weight of 500 or less.

[0041] Specifically, the phosphoric acid and its salts are at least one selected from pyrophosphoric acid, tripolyphosphoric acid, metaphosphoric acid, phytic acid, and salts thereof. Specifically, the phosphonic acid and its salt are at least one selected from hydroxyethanediphosphonic acid, aminotrimethylenephosphonic acid, ethylenediaminetetramethylenephosphonic acid, phosphonobutanetricarboxylic acid, and salts thereof. Specific examples of the aminocarboxylic acid and its salt include at least one selected from edetic acid (EDTA), nitrilotriacetic acid (NTA), hydroxyethyliminodiacetic acid (HIDA), 3-hydroxy-2,2'-iminodisuccinic acid tetrasodium salt (HIDS), diethylenetriaminepentaacetic acid (DPTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), dihydroxyethylglycine (DHEG), L-glutamic acid diacetate (GLDA), methylglycine diacetate (MGDA), and salts thereof. Specifically, the dicarboxylic acid and its salt are at least one selected from oxalic acid, malonic acid, succinic acid, glutaric acid, phthalic acid, isophthalic acid, and salts thereof. Specifically, the tricarboxylic acid and its salt are at least one selected from propanetricarboxylic acid, cyclohexanetricarboxylic acid, and salts thereof. The hydroxycarboxylic 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 at least one selected from acrylic maleic acid copolymers, polyacrylic acid polymers, and salts thereof.

[0042] Ingredient (g) is added to improve foaming properties by reducing the pK Ca It is preferable that the calcium stability constant (Ca stability constant) is greater than 3.0. (g) pK of component Ca was measured by the following method. <pK Ca Measurement method> As a buffer solution, an aqueous solution containing 0.1 M KOH, 0.1 M NH4Cl, and 0.1 M NH4OH is prepared. All sample solutions are prepared using this buffer solution. All sample solutions are measured at a temperature of 20°C. 2+ For example, the concentration is measured using an ion meter 920A manufactured by Orion Corporation and Ca 2+ An ion electrode can be used. First, determine the relationship between calcium chloride concentration and electrode potential and create a calibration curve. -2 mol / L solution of the sample compound (component (b) or component (f)) -4 Prepare a 100 ml solution of the sample compound. Add 1 ml of calcium chloride solution to 100 ml of the prepared solution and stir for 5 minutes. 2+ Ca concentration 2+ The sample compound is Ca. 2+ Assuming that a 1:1 chelate complex is formed, the pK Ca (Calcium stability constant, Ca stability constant) is calculated.

[0043]

number

[0044] In particular, 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 one or more 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, one or more selected from phosphonobutanetricarboxylic acid (also referred to as PBTA), hydroxyethanediphosphonic acid (also referred to as HEDP), and salts thereof are even more preferred, and are also excellent in terms of foam stability when diluted and used in a detergent composition containing component (d).

[0045] When the cleaning composition of the present invention contains the component (g), from the viewpoint of improving foaming properties when used in a diluted form, the cleaning composition contains the 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 the potassium salt.

[0046] In addition to components (a) to (g), the cleaning composition of the present invention may optionally contain other components (excluding those corresponding to components (a) to (g)) within the scope of the object of the present invention, such as organic solvents such as butyl carbitol (also known as diethylene glycol monobutyl ether), phenoxyethanol, or ethylene glycol; dispersants such as polyacrylic acid, maleic acid-isobutylene copolymers, or salts thereof; pH adjusters such as lactic acid or citric acid; thickeners; viscosity modifiers; fragrances; colorants; antioxidants; preservatives; bleaching agents; and bleach activators.

[0047] 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 (g) 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.

[0048] The pH of the cleaning composition of the present invention at 25°C is preferably 11.0 or higher, more preferably 12.0 or higher, still more preferably 13.0 or higher, even more preferably 13.2 or higher, and 14 or lower from the viewpoint of improving cleaning performance. The pH at 25°C can be measured by the glass electrode method. The pH of the cleaning composition of the present invention at 25°C is specifically measured by the following pH measurement method.

[0049] <pH Measurement Method> Connect a combined electrode for pH measurement (glass sliding sleeve type manufactured by HORIBA) to a pH meter (pH / Ion meter F-23 manufactured by HORIBA) and turn on the power. As the internal solution of the pH electrode, a saturated potassium chloride aqueous solution (3.33 mol / L) is used. Next, fill 100 mL beakers with 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) respectively, and immerse them in a constant temperature bath at 25°C for 30 minutes. Immerse the pH measurement electrode in the standard solution adjusted to a constant temperature for 3 minutes, and perform calibration operations in the order of pH 6.86 → pH 9.18 → pH 12.0. Adjust the sample to be measured (the cleaning composition of the present invention) to 25°C, immerse the electrode of the above pH meter in the sample, and measure the pH after 1 minute. In addition, the pH at 25°C of a dilution solution obtained by diluting the cleaning composition of the present invention with water can also be measured by the same method. In that case, in the above description, the cleaning composition of the present invention shall be read as a dilution solution obtained by diluting the cleaning composition of the present invention with water.

[0050] The cleaning composition of the present invention may be diluted with water before use. For example, when in use, the cleaning composition of the present invention is preferably diluted with water having a hardness of preferably 0.1°DH or higher, more preferably 0.2°DH or higher, still more preferably 0.3°DH or higher, even more preferably 0.5°DH or higher, even more preferably 1°DH or higher, even more preferably 2°DH or higher, and preferably 20°DH or lower, more preferably 10°DH or lower, still more preferably 8°DH or lower, even more preferably 6°DH or lower. This water preferably contains calcium ions.

[0051] In this specification, water hardness (°DH) refers to German hardness, which indicates the concentration of calcium and magnesium in water expressed as a CaCO3 equivalent 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 components added. Furthermore, 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 ethylenediaminetetraacetic acid disodium salt, as described below. A specific method for measuring the German hardness of water in this specification is shown below.

[0052] <Method for measuring water hardness in Germany> 〔reagent〕 0.01 mol / L EDTA·2Na solution: 0.01 mol / L aqueous solution of disodium ethylenediaminetetraacetic acid (titration solution, 0.01 M EDTA-Na2, manufactured by Sigma-Aldrich) ·Universal BT indicator (product name: Universal BT, manufactured by Dojindo Kagaku Kenkyusho Co., Ltd.) Ammonia buffer solution for hardness measurement (67.5 g of ammonium chloride dissolved in 570 mL of 28 w / v% ammonia water, and then made up to 1000 mL with deionized water) [German hardness measurement] (1) Use a volumetric pipette to collect 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. After addition, confirm that the solution is reddish purple. (4) While shaking the conical beaker well, add 0.01 mol / L EDTA·2Na solution dropwise from the buret until the sample water turns blue. The end point of the titration is determined. (5) The total hardness is calculated using the following formula. Hardness (°DH)=T×0.01×F×56.0774×100 / A T:0.01mol / L Titration amount of EDTA・2Na solution (mL) A: Sample volume (20 mL, volume of sample water) F: Factor of 0.01 mol / L EDTA·2Na solution

[0053] The cleaning composition of the present invention is foamed for use and is preferably used on the hard surfaces of hard articles, and further for food processing equipment and / or cooking equipment. That is, the present invention is a foaming cleaning composition for hard surfaces, and further 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 metal. In the present invention, the term "food processing equipment and / or cooking equipment" refers to the equipment and facilities used in processing and / or cooking food in a food processing factory. Examples of such equipment include net conveyors, freezers, slicers, rice polishers, etc. Furthermore, examples of such equipment include floors, walls, work tables, etc.

[0054] [How to clean hard surfaces] The present invention provides a method for cleaning hard surfaces, the method including the steps of: mixing 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), and 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; and 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 maintaining the foam. In the method for cleaning a hard surface of the present invention, the detergent composition is the same as the detergent composition of the present invention, and the aspects described for the detergent composition of the present invention can be appropriately applied. The present invention also relates to a method for cleaning a hard surface with foam obtained 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.

[0055] In the method for cleaning hard surfaces 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.

[0056] 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, still more preferably 8° DH or less, and still more preferably 6° DH or less. Tap water can be used as the water for dilution.

[0057] 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 (a) in an amount of preferably 0.0005% by mass or more, more preferably 0.005% by mass or more, even more preferably 0.01% by mass or more, and preferably 0.5% by mass or less, more preferably 0.3% by mass or less, and even more preferably 0.1% by mass or less, from the viewpoint of improving foaming properties and cleaning properties.

[0058] 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, and preferably 1% by mass or less, more preferably 0.7% by mass or less, even more preferably 0.5% by mass or less, from the viewpoint of the cleansing and rinsing properties of the modified oil.

[0059] 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 (c) 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, even more preferably 0.5% by mass or less, from the viewpoint of improving cleaning properties.

[0060] 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 (d) in an amount of preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, and preferably 1% by mass or less, more preferably 0.7% by mass or less, even more preferably 0.5% by mass or less, from the viewpoint of improving the bactericidal effect.

[0061] 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.

[0062] 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, even more preferably 0.5% by mass or less.

[0063] 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 0.2% by mass or more, and preferably 1% by mass or less, more preferably 0.7% by mass or less, even more preferably 0.5% by mass or less.

[0064] 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 the same as the ranges described above for the detergent composition of the present invention.

[0065] In the method for cleaning a hard surface of the present invention, the pH at 25°C of the 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 cleaning performance, and is preferably 13.5 or less, more preferably 13.0 or less, even more preferably 12.8 or less.

[0066] In the method for cleaning hard surfaces of the present invention, the time for which the diluted solution is foamed and brought into contact with the target hard surface and then 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, is 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. In the method for cleaning hard surfaces of the present invention, the time for which the foam is retained is preferably 10 minutes or more, more preferably 15 minutes or more, and even more preferably 20 minutes or more, from the viewpoint of cleaning performance, and from the same viewpoint is preferably 60 minutes or less, more preferably 45 minutes or less, and even more preferably 30 minutes or less. It is preferable to leave it as it is while the foam is maintained, but it is also possible to add a small amount of water or the like.

[0067] 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 to the above-mentioned preferred water temperature. 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.

[0068] 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.

[0069] 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, at a dilution ratio of 2 to 200 times (preferably 5 to 200 times), and spraying the composition in the form of foam onto food processing equipment and / or cooking equipment while diluting the cleaning composition. Step 2: Keeping the foam for a certain period of time Step 3: Rinse food processing and / or cooking equipment with water

[0070] In step 1, the cleaning composition is the same as the cleaning composition of the present invention, and the aspects 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 the mixture is diluted and mixed 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.

[0071] In order to improve rinsing performance, the diluted solution of the detergent composition that is sprayed onto the hard surface in the form of foam in step 1 contains component (a) in an amount of preferably 0.0005% by mass or more, more preferably 0.005% by mass or more, even more preferably 0.01% by mass or more, 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.

[0072] 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 0.001% 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.

[0073] Furthermore, from the viewpoint of improving cleaning performance, the diluted solution of the detergent composition to be sprayed onto a hard surface in the form of foam 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 0.1% 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.

[0074] Furthermore, from the viewpoint of improving the bactericidal effect, the diluted solution of the cleaning composition to be sprayed onto a hard surface in the form of foam 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 0.3% by mass or more, and preferably 1% by mass or less, more preferably 0.7% by mass or less, even more preferably 0.5% by mass or less.

[0075] 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.

[0076] When the diluted solution of the detergent composition to be sprayed onto a hard surface in the form of foam 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.

[0077] When the diluted solution of the detergent composition to be sprayed onto a hard surface in the form of foam contains the component (g), in order to improve foaming properties, 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 0.2% 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.

[0078] 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 the same as the ranges described above for the detergent composition of the present invention.

[0079] 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 a diluted solution of the detergent composition at 25°C is preferably 10.0 or higher, more preferably 11.0 or higher, even more preferably 12.0 or higher, and is preferably 13.5 or lower, more preferably 13.0 or lower, even more preferably 12.8 or lower.

[0080] 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 processing areas, such as production lines in food processing plants, foam washer machines (e.g., "SCU-HF" manufactured by Spraying Co., Ltd., "KF-100" and "KF-200" manufactured by Kao Corporation, and "Foam iT" manufactured by C.B.S. Co., Ltd.) are preferably used. For small processing areas, such as cutting boards and other cooking utensils, hand sprayers capable of intermittently generating foam, such as trigger sprayers and foamer sprayers, are preferably used.

[0081] It is preferable to spray the foam without interruption in step 1. Here, "without interruption" spraying means, for example, using a foam washer, the cleaning agent continues to spray in foam continuously (for example, for 5 seconds or more) while the tap is opened with a lever or switch, and this is to be distinguished from "intermittent" spraying, for example, using a hand sprayer such as a trigger sprayer or foam sprayer, in which spraying begins when the lever is pulled and then stops instantly.

[0082] 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 is large.

[0083] 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.

[0084] Step 2 is a step of spraying the diluted solution of the cleaning composition in step 1 in the form of foam, attaching it to food processing equipment and / or cooking equipment, and maintaining the foam for a certain period of time. The time for which the foam is maintained in step 2 is preferably 1 minute or more from the viewpoint of the mechanism and operability of each device, and from the same viewpoint, is 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. Furthermore, the time for which the foam is maintained in step 2 is preferably 10 minutes or more, more preferably 15 minutes or more, and even more preferably 20 minutes or more, from the viewpoint of improving cleansing properties, and from the same viewpoint is preferably 60 minutes or less, more preferably 45 minutes or less, and even more preferably 30 minutes or less.

[0085] 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 situation 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.

[0086] It is preferable to leave the mixture as it is while maintaining the foam in step 2, but it is also possible to add a small amount of water or the like.

[0087] 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 it may be heated to adjust to the above-mentioned preferred water temperature. Generally, rinsing is performed by hand 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. [Example]

[0088] Components (a), (b), (c), (d), (e), (f) and (g) used in the examples, comparative examples and composition examples are shown below.

[0089] <Component (a)> Me-ISA-K: Potassium hydroxide neutralized isostearic acid synthesized by the following method

[0090] Synthesis method of 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%, others), 32 g of H-mordenite zeolite (HSZ-620HOA, manufactured by Tosoh Corporation: SiO2 / Al2O3 [molar ratio] = 15, average pore size 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 the pressure was increased to 18 kgf / cm. 2 The reaction mixture was cooled and taken out, and the zeolite was filtered off. The mixture was distilled under reduced pressure to obtain 347.6 g of monomer acid (branched unsaturated fatty acid). This monomer acid and 3.5 g of 5% Pd / C were placed in an autoclave and heated at 20 kgf / cm 2 The mixture was heated to 150°C under a hydrogen atmosphere and reacted for 3 hours. After the reaction was completed, 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 with a branched hydrocarbon group, a main chain of 16 carbon atoms, and one side chain with a carbon number of 1, and is a mixture of side chains branched at positions 3 to 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

[0091] <(b) Component> LAS-K: Linear dodecylbenzenesulfonic acid (Neopelex GS, Kao Corporation) neutralized with potassium hydroxide SAS: Sodium secondary alkanesulfonate with 14 to 17 carbon atoms (Latemul PS, manufactured by Kao Corporation) C16IOS: sodium salt of internal olefin sulfonate having 16 carbon atoms (the one described in paragraph 0100 of JP 2021-120423 A) C18IOS: sodium salt of internal olefin sulfonate having 18 carbon atoms (the one described in JP 2021-120423 A, paragraph 0099 is used) SDS: sodium lauryl sulfate (EMAL 0, 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)

[0092] <(c) component> KOH: Potassium hydroxide (liquid caustic potash (48%), manufactured by Toagosei Co., Ltd.) <(d) component> Hypochlorite: Sodium hypochlorite (sodium hypochlorite, manufactured by Tosoh Corporation) <(e) component> PTS-K: Paratoluenesulfonic acid (PTS MT-70, manufactured by Meiyu Sangyo Co., Ltd.) neutralized with potassium hydroxide MXS-K: Metaxylene sulfonic acid (SXA-60, manufactured by Itochu Chemical Frontier Corporation) neutralized with potassium hydroxide <Component (f)> C8FA-K: Caprylic acid (Lunac 8-98(E), Kao Corporation) neutralized with potassium hydroxide <(g) component> PBTC-5K: 2-phosphonobutane-1,2,4-tricarboxylic acid (PH-430, manufactured by Cherest Co., Ltd.) neutralized with potassium hydroxide

[0093] (1) Method for producing a 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), and optionally component (f) and component (g) were added in that order so that the contents were 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 cleaning composition. The pH at 25°C of the cleaning compositions of each Example and Comparative Example was as shown in Table 1. Furthermore, the mass % of the components contained in Table 1 is all based on the active ingredient.

[0094] (2) Rinseability 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 then foamed using a pump foamer (Biore Hand Soap, manufactured by Kao Corporation), and the initial foam volume (mL) was measured. Next, 4° dH hard water was added to the measuring cylinder with a 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 rinsing water volume (mL). The results are shown in Table 1.

[0095] (3) Low-temperature storage stability evaluation 80 mL of the 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 inspection was performed, and a rating of ◯ was given if the cleaning composition was uniform and transparent, and × if the liquid phase separated. The results are shown in Table 1.

[0096] (4) High-temperature storage stability evaluation (evaluation of available chlorine remaining 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 at 50°C for 10 days. After storage, the available chlorine concentration of the cleaning composition was measured by the iodometric titration method described below, and the remaining rate of available chlorine was calculated. [Iodometric titration method] Arbitrary amounts of the cleaning composition before and after storage were measured as measurement samples in 100 mL beakers, diluted with 50 mL of deionized water, and 10 mL of 10% potassium iodide aqueous solution and dilute sulfuric acid were added and stirred. The titer was measured by titrating the liberated iodine with 0.1 N sodium thiosulfate solution. If the color change is difficult to see, a starch aqueous solution may be added as desired. The available chlorine concentration was calculated from the titer 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. It can be said that the higher the available chlorine residual rate, the better the storage stability of the oxidizing halogen acid (component (d)) under high-temperature conditions simulating summer. Available chlorine concentration (%) = [(titration amount) x 1.003 x 0.3546] ÷ [sample amount] Available chlorine remaining rate (%) = Available chlorine concentration ÷ Available chlorine concentration before storage × 100

[0097] [Table 1]

[0098] <Composition example> Table 2 shows examples of the composition of the cleaning composition of the present invention. 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.

[0099] [Table 2]

Claims

1. 1. A cleaning agent composition comprising: 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 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): anionic surfactant (excluding component (a)) Component (c): Alkaline agent Component (d): oxidizing halogen acid and / or its salt Component (e): Hydrotrope

2. The cleaning composition according to claim 1, further comprising the following component (f) in an amount of 0.01 mass % or more and 15 mass % or less: Component (f): fatty acid having 8 to 10 carbon atoms and / or its salt

3. 3. The cleaning composition according to claim 2, wherein the mass ratio (f) / (b) of the content of the component (f) to the content of the component (b) is 1 / 10 or more and 10 / 1 or less.

4. The cleaning composition according to claim 1 or 2, further comprising the following component (g) in an amount of 0.05 mass % or more and 10 mass % or less: Component (g): Sequestering agent

5. The detergent composition according to claim 1 or 2, which is a liquid detergent composition.

6. 3. The cleaning composition according to claim 1, which is for use on hard surfaces and is foamed when used.

7. A method for cleaning a hard surface, comprising: a step of foaming a diluted solution obtained by mixing water with a detergent composition containing the following component (a): 0.005% by mass or more and 5% 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): 0.01% by mass or more and 15% by mass or less of the following component (d): 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): 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): anionic surfactant (excluding component (a)) Component (c): Alkaline agent Component (d): oxidizing halogen acid and / or its salt Component (e): Hydrotrope

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. 9. The 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. 9. The method for cleaning a hard surface according to claim 7 or 8, wherein the water used to dilute the cleaning composition and the water used to rinse after retaining the foam are tap water.

Images