Cleaning composition for hard surfaces

Abstract

To provide a detergent composition for a hard surface, having excellent detergency against complex stains, such as lipids and proteins adhering to a hard surface, rinseability, low substrate damageability, and compounding stability.SOLUTION: A detergent composition for a hard surface comprises (a) a surfactant and (b) a glycol solvent and water. As a composition, (a) contains (a1) a compound represented by the following general formula and (a2) an anionic surfactant, where a total content of the (a1) component and the (a2) component is more than 0.5 mass% and less than 6.5 mass%; a mass ratio (a1) / (a2) between a content of the (a1) component and a content of the (a2) component is 0.1 or more and 10 or less; a mass ratio of a total content of the (a1) component and the (a2) component to a content of the (b) component is 0.1 or more and 6 or less; and pH at 20°C is 9 or more and less than 12. In the formula, R is an 8-18C alkyl group; and X- is a counter ion.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cleaning composition for hard surfaces and a method for cleaning hard surfaces. [Background technology]

[0002] Hard surfaces, such as those in bathrooms, are prone to the accumulation of complex dirt composed of lipids (such as sebum) and proteins (such as keratin derived from hair). With the recent popularity of modular baths, bathrooms are increasingly made of materials such as polyester and acrylic resins, making the lipid and protein dirt that adheres to these hydrophobic surfaces difficult to remove. To remove such dirt, people apply detergent and scrub it using a sponge or similar. However, cleaning hard surfaces, such as those in bathrooms, with cleaning tools is a tedious task, and particularly hard work for the elderly. Therefore, there is a need for a technology that allows anyone to easily remove dirt without having to perform strenuous tasks such as scrubbing.

[0003] Patent Document 1 discloses a technology in which a specific anionic surfactant and a cationic surfactant are blended to provide a product with high disinfecting and cleaning power, while also exhibiting excellent storage stability and preventing the formation of insoluble matter such as precipitates. Patent Document 2 discloses a liquid detergent composition that contains (a) a specific quaternary ammonium salt-type cationic surfactant having 1 to 3 alkyl groups each having 6 to 16 carbon atoms, (b) a carboxylate-type anionic surfactant having an alkyl or alkenyl group each having 8 to 16 carbon atoms, and (c) an alkyl polyglycoside having an alkyl group each having 8 to 16 carbon atoms and an average monosaccharide condensation degree of 1 to 3, in specific ratios, and that has excellent detergency against stains such as metal soap scum and sebum, and also produces good foam adhesion when used in a trigger spray container. Patent Document 3 discloses a bathroom cleaner composition containing at least a surfactant, a chelating agent, a polymer compound, a solvent, and a fragrance. Patent Document 4 discloses a liquid detergent composition that contains an amphoteric surfactant, a cationic surfactant, polylysine, and a specific organic solvent, and is suitable for disinfecting and cleaning interior surfaces of a home. Patent Document 5 discloses a liquid detergent composition containing (a) a specific cationic surfactant such as an alkyltrimethylammonium salt, (b) a specific amphoteric surfactant such as an alkylaminoacetic acid betaine, and (c) a fatty acid or a salt thereof. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-147656 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-290049 [Patent Document 3] Japanese Patent Application Laid-Open No. 2003-183698 [Patent Document 4] Japanese Patent Application Laid-Open No. 2002-241790 [Patent Document 5] Japanese Patent Application Publication No. 9-53092 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when cleaning hard surfaces, various complex soils adhere. For example, as mentioned above, lipids and proteins are difficult to remove, and when these are combined, the soils become even more difficult to remove. In addition to detergency, detergent compositions are also required to have excellent rinsability after cleaning, low damage to the substrate to be cleaned, and stability during formulation. To date, no detergent composition for hard surfaces that comprehensively satisfies these requirements has been found.

[0006] The present invention provides a detergent composition for hard surfaces that has excellent detergency against complex stains such as lipids and proteins adhering to hard surfaces, excellent rinsing properties, low damage to substrates, and excellent blend stability, and a method for cleaning hard surfaces using the same. [Means for solving the problem]

[0007] The present invention provides a composition comprising (a) a surfactant (hereinafter referred to as component (a)), a glycol-based solvent (hereinafter referred to as component (b)), and water, The component (a) contains (a1) a compound represented by the following general formula [hereinafter referred to as component (a1)] and (a2) an anionic surfactant [hereinafter referred to as component (a2)], The total content of the (a1) component and the (a2) component is more than 0.5 mass% and less than 6.5 mass%, the mass ratio (a1) / (a2) of the content of the component (a1) to the content of the component (a2) is 0.1 or more and 10 or less; the mass ratio of the total content of the component (a1) and the component (a2) to the content of the component (b), [(a1) + (a2)] / (b), is 0.1 or more and 6 or less; pH at 20°C is 9 or more but less than 12, The present invention relates to a cleaning composition for hard surfaces.

[0008] [ka]

[0009] [wherein R is an alkyl group having 8 to 18 carbon atoms. X - indicates a counter ion.

[0010] The present invention also relates to a method for cleaning a hard surface, which comprises applying the hard surface cleaning composition of the present invention to the hard surface and then rinsing the surface without scrubbing. [Effects of the Invention]

[0011] According to the present invention, there are provided a hard surface detergent composition that has excellent detergency, rinsability, low substrate damage, and formulation stability against complex soils of lipids and proteins attached to hard surfaces (hereinafter sometimes simply referred to as complex soils), and a method for cleaning hard surfaces using the same. The hard surface detergent composition of the present invention is low in damage to substrates even in its weakly alkaline composition. [Brief explanation of the drawings]

[0012] [Figure 1] Schematic diagram showing the method for evaluating rinsing performance in the examples [Figure 2] Schematic diagram showing the perforation state of the hard water introduction means (watering can) used in the evaluation of rinsing performance in the examples. DETAILED DESCRIPTION OF THE INVENTION

[0013] [Cleaning composition for hard surfaces] The cleaning composition for hard surfaces of the present invention contains component (a), component (b), and water, The surfactant of the component (a) contains the components (a1) and (a2), The total content of the (a1) component and the (a2) component is more than 0.5 mass% and less than 6.5 mass%, the mass ratio (a1) / (a2) of the content of the component (a1) to the content of the component (a2) is 0.1 or more and 10 or less; the mass ratio of the total content of the component (a1) and the component (a2) to the content of the component (b), [(a1) + (a2)] / (b), is 0.1 or more and 6 or less; The pH at 20°C is 9 or more but less than 12.

[0014] The hard surface cleaning composition of the present invention contains component (a1) as component (a). Component (a1) is a compound represented by the following general formula, which is useful for disinfecting.

[0015] [ka]

[0016] [wherein R is an alkyl group having 8 to 18 carbon atoms. X - indicates a counter ion. In the above formula, the number of carbon atoms in R is 8 or more, and may be 10 or more, and may be 18 or less, and may be 16 or less, and may be 14 or less.

[0017] In the above formula, the number of carbon atoms in R is preferably 10 or more from the viewpoint of improving the detergency for complex soils, and is preferably 10 or less from the viewpoint of further improving the rinsability. In the above formula, the number of carbon atoms in R is preferably 10 from the viewpoint of further improving the detergency for complex soils and the rinsability. In the formula, X - is a counter ion, and examples thereof include halogen ions such as chloride ion, alkylsulfonate ions such as methanesulfonate and ethanesulfonate, and alkylsulfate ions such as methylsulfate and ethylsulfate, with chloride ion being preferred.

[0018] More specific examples of component (a1) include dimethyldecylbenzyl ammonium salt, dimethyloctylbenzyl ammonium salt, dimethyldodecylbenzyl ammonium salt, and dimethyloctadecylbenzyl ammonium salt. These are preferably salts of chloride ions.

[0019] The hard surface cleaning composition of the present invention preferably contains decyldimethylbenzylammonium salt as component (a1), from the viewpoint of further enhancing the cleaning power for complex soils and the rinsing properties.

[0020] The cleaning composition for hard surfaces of the present invention contains component (a2) as component (a). Component (a2) is an anionic surfactant. Examples of component (a2) include an anionic surfactant having one or more hydrocarbon groups and one or more groups selected from the group consisting of a sulfonic acid group, a sulfate ester group, and a carboxylic acid group. The number of carbon atoms in the hydrocarbon group may be, for example, 8 or more, 10 or more, 12 or more, 22 or less, 20 or less, or 18 or less. Examples of the hydrocarbon group include an alkyl group and an alkenyl group. The hydrocarbon group may be linear or branched.

[0021] Examples of component (a2) include fatty acids or salts thereof, polyoxyalkylene alkyl or ether sulfates, alkyl or alkenyl sulfates, polyoxyalkylene alkyl or alkenyl ether carboxylates, internal olefin sulfonates, alkylbenzene sulfonates, etc. These may have the aforementioned hydrocarbon group.

[0022] The cleaning composition for hard surfaces of the present invention preferably contains a fatty acid or a salt thereof as component (a2). The fatty acid (a2) may be either a straight-chain fatty acid or a branched-chain fatty acid, with straight-chain fatty acids being preferred, and may be either a saturated or unsaturated fatty acid, with saturated fatty acids being preferred. Examples of fatty acid salts include alkali metal salts such as sodium salts and potassium salts, and alkaline earth metal salts, with alkali metal salts being preferred.

[0023] The fatty acid of component (a2) is preferably a fatty acid having 8 or more carbon atoms, more preferably 10 or more, even more preferably 12 or more, and 22 or less, even more preferably 18 or less, and even more preferably 16 or less. That is, the fatty acid or salt thereof of component (a2) may be a fatty acid or salt thereof having 8 or more and 22 or less carbon atoms.

[0024] Examples of other (a2) components include polyoxyalkylene alkyl or alkenyl ether sulfates or salts thereof, olefin sulfonates, polyoxyalkylene alkyl or alkenyl ether acetates or salts thereof, and the like.

[0025] The oxyalkylene group of the polyoxyalkylene alkyl or alkenyl ether sulfate or salt thereof is preferably an oxyethylene group. The average number of moles of oxyalkylene groups added in the polyoxyalkylene alkyl or alkenyl ether sulfate or salt thereof is preferably 1 or more and 10 or less. The alkyl or alkenyl group of the polyoxyalkylene alkyl or alkenyl ether sulfate salt or its salt preferably has a carbon number of 10 to 18. The salt is preferably an alkali metal salt such as a sodium salt or a potassium salt.

[0026] The olefin sulfonic acid or a salt thereof may be an internal olefin sulfonic acid or a salt thereof. The number of carbon atoms in the olefin moiety of the internal olefin sulfonic acid may be, for example, 8 or more, or even 10 or more, and 24 or less, or even 20 or less. The salt is preferably an alkali metal salt such as a sodium salt or a potassium salt.

[0027] The oxyalkylene group of the polyoxyalkylene alkyl or alkenyl ether acetate ester or salt thereof is preferably an oxyethylene group. The average number of moles of oxyalkylene groups added in the polyoxyalkylene alkyl or alkenyl ether acetate ester or salt thereof is preferably 1 or more and 10 or less. The alkyl or alkenyl group of the polyoxyalkylene alkyl or alkenyl ether acetate ester or salt thereof preferably has a carbon number of 10 to 18. The salt is preferably an alkali metal salt such as a sodium salt or a potassium salt.

[0028] The hard surface detergent composition of the present invention preferably contains, as component (a2), a fatty acid or a salt thereof having from 8 to 22 carbon atoms. In the hard surface detergent composition of the present invention, the proportion of the fatty acid or a salt thereof having from 8 to 22 carbon atoms in component (a2) is, for example, 20% by mass or more, further 35% by mass or more, further 50% by mass or more, and may be 100% by mass or less.

[0029] In the hard surface detergent composition of the present invention, from the viewpoint of detergency against complex soils and blend stability, the total content of the component (a1) and the component (a2) exceeds 0.5% by mass, preferably 1% by mass or more, more preferably 1.5% by mass or more, and is less than 6.5% by mass, preferably 6% by mass or less, more preferably 5% by mass or less, and even more preferably 4% by mass or less. In the present invention, the amount of component (a1) is determined by using chloride ions (Cl - In the present invention, the amount of fatty acid or its salt in component (a2) is the amount based on the acid type compound, that is, the amount converted into an acid type compound, and the other anionic surfactants have a counter ion replaced with a sodium ion (Na + ) is the amount based on the compound replaced by sodium salt, i.e., the amount converted into sodium salt.

[0030] In the hard surface cleaner composition of the present invention, from the viewpoint of detergency against complex soils and rinsability, the mass ratio (a1) / (a2) of the content of the component (a1) to the content of the component (a2) is 0.1 or more, preferably 0.5 or more, more preferably 1 or more, and is 10 or less, preferably 8 or less, more preferably 7 or less.

[0031] The hard surface cleaning composition of the present invention may contain, for example, 0.2 mass % or more, further 0.5 mass % or more, and 4 mass % or less, further 2 mass % or less of component (a1), while satisfying the above-mentioned total amount and mass ratio.

[0032] The hard surface cleaning composition of the present invention may contain, for example, 0.2 mass % or more, further 0.4 mass % or more, and 2 mass % or less, further 1.5 mass % or less of component (a2), while satisfying the above-mentioned total amount and mass ratio.

[0033] The hard surface cleaning composition of the present invention may contain, as component (a), a surfactant other than components (a1) and (a2) [hereinafter referred to as component (a3)]. Component (a3) ​​may be selected from amphoteric surfactants and nonionic surfactants.

[0034] The amphoteric surfactant is not particularly limited, but from the viewpoints of detergency, foaming, and rinsing properties, it is preferable to use one or more amphoteric surfactants selected from the group consisting of alkyl betaines, alkylamido betaines, alkyl sulfobetaines, alkylhydroxysulfobetaines, alkylamidohydroxysulfobetaines, alkylamino fatty acid salts, alkylimidazoline betaines, and alkylamine oxides. The number of carbon atoms in these alkyl groups may be 8 to 22. Among these, amphoteric surfactants selected from the group consisting of alkyl (having 8 to 22 carbon atoms) amidopropyl betaine and alkyl (having 8 to 22 carbon atoms) hydroxysulfobetaine are preferred, and amphoteric surfactants selected from the group consisting of (3-lauramidopropyl)dimethyl betaine and lauryl dimethyl hydroxysulfobetaine are even more preferred. Two or more of the amphoteric surfactants listed here may also be used in combination.

[0035] The nonionic surfactant is not particularly limited, but polyoxyethylene alkyl or alkenyl ethers, polyoxyalkylene alkylphenyl ethers, sucrose fatty acid esters, fatty acid glycerin esters, higher fatty acid alkanolamides or their alkylene oxide adducts, alkyl polyglucosides, and monoalkyl or alkylene glyceryl ethers are preferred from the viewpoints of detergency against complex soils, foaming, and rinsing properties. The number of carbon atoms in these alkyl or alkenyl groups may be 8 to 22. Among these, from the viewpoint of detergency and rinsing ability against complex soils, it is preferable to use one or more nonionic surfactants selected from the group consisting of polyoxyethylene alkyl or alkenyl ethers having an alkyl group or an alkenyl group, more preferably a polyoxyethylene alkyl or alkenyl ether in which an average of more than 0 moles but not more than 30 moles of alkylene oxide having from 2 to 4 carbon atoms is added to a primary or secondary alcohol having from 8 to 18 carbon atoms, and even more preferably a polyoxyethylene alkyl or alkenyl ether in which an average of more than 1 mole but not more than 20 moles of alkylene oxide having from 2 to 4 carbon atoms is added to a secondary alcohol having from 10 to 16 carbon atoms. Two or more of the nonionic surfactants listed here may also be mixed and used.

[0036] Furthermore, the component (a) may contain a cationic surfactant other than the component (a1) (hereinafter also referred to as the other cationic surfactant), such as trimethyldecylammonium chloride. When the cleaning composition for hard surfaces of the present invention contains the other surfactant as the component (a), the proportion of the other cationic surfactant in the total of the component (a1) and the other cationic surfactant may be, for example, 75% by mass or less, or even 25% by mass or less.

[0037] When the hard surface cleaning composition of the present invention contains a surfactant selected from an amphoteric surfactant and a nonionic surfactant as component (a3), the composition preferably contains component (a3) ​​in an amount of 2% by mass or more, more preferably 4% by mass or more, and preferably 8% by mass or less, more preferably 6% by mass or less. Furthermore, the proportion of component (a3) ​​in the total content of components (a1), (a2), and (a3) ​​is preferably 50% by mass or more, more preferably 60% by mass or more, and preferably 90% by mass or less, more preferably 80% by mass or less. Component (a3) ​​may be both an amphoteric surfactant and a nonionic surfactant. Furthermore, the mass ratio of the amphoteric surfactant content to the nonionic surfactant content, (amphoteric surfactant) / (nonionic surfactant), may be, for example, 0.5 or more, or even 1.5 or more, and 3.5 or less, or even 2.5 or less.

[0038] In the hard surface cleaning composition of the present invention, the proportion of the content of the component (a1) in the total content of the component (a) may be, for example, 1% by mass or more, further 5% by mass or more, further 10% by mass, and 50% by mass or less, further 45% by mass or less, further 40% by mass or less.

[0039] In the hard surface cleaning composition of the present invention, the proportion of the content of the component (a2) in the total content of the component (a) may be, for example, 1% by mass or more, further 5% by mass or more, further 8% by mass, and 30% by mass or less, further 20% by mass or less, further 15% by mass or less.

[0040] In the hard surface cleaning composition of the present invention, the total content of component (a) may be, for example, 3% by mass or more, further 4% by mass or more, further 5% by mass or more, and 15% by mass or less, further 10% by mass or less, further 8% by mass or less.

[0041] Component (b) is a glycol-based solvent. Regarding component (b), the glycol-based solvent may refer to either a compound having two hydroxyl groups or an ether compound in which one or both hydrogen atoms of the hydroxyl groups are substituted with another group. The ether compound is preferably an aliphatic ether compound. Also, an ether compound in which one hydrogen atom of the hydroxyl group of a glycol compound is substituted with another group is preferred.

[0042] Component (b) is preferably a glycol-based water-soluble solvent having from 2 to 12 carbon atoms. Water-soluble means that 50 g or more dissolves in 100 g of water at 20° C. Component (b) preferably has an octanol / water partition coefficient (LogP) of 3.5 or less, more preferably 0.79 or less, and preferably -5 or more, more preferably -3 or more.

[0043] The total number of carbon atoms in component (b) is preferably 2 or more, more preferably 3 or more, more preferably 4 or more, even more preferably 5 or more, and even more preferably 6 or more, from the viewpoint of cleaning power against complex soils, and is preferably 12 or less, preferably 10 or less, and more preferably 8 or less, from the viewpoint of cleaning power against complex soils.

[0044] Examples of component (b), from the viewpoint of cleaning power against complex soils, include ethylene glycol (carbon number 2), propylene glycol (carbon number 3), diethylene glycol (carbon number 4), propylene glycol monomethyl ether (carbon number 4), isoprene glycol (carbon number 5), propylene glycol monoethyl ether (carbon number 5), 3-methyl-3-methoxybutanol (carbon number 6), ethylene glycol monobutyl ether (carbon number 6), dipropylene glycol (carbon number 6), diethylene glycol monobutyl ether (carbon number 8), dibutylene glycol (carbon number 8), and dipropylene glycol monobutyl ether (carbon number 10).

[0045] The component (b) is preferably a glycol having 2 or 3 carbon atoms, such as ethylene glycol, polyethylene glycol, propylene glycol, or polypropylene glycol, or a polyether or monoalkyl ether thereof. The alkyl group of this monoalkyl ether is The alkyl group preferably has 1 to 4 carbon atoms, and is methyl, ethyl, various propyl groups, and various butyl groups. The term "various" includes normal, iso, and tertiary alkyl groups.

[0046] In terms of detergency, the hard surface cleaner composition of the present invention more preferably contains, as component (b), one or more selected from the group consisting of propylene glycol (carbon number: 3), ethylene glycol monobutyl ether (carbon number: 6), propylene glycol monobutyl ether (carbon number: 7), diethylene glycol monobutyl ether (carbon number: 8), and dipropylene glycol monobutyl ether (carbon number: 10). It is preferable that component (b) contains diethylene glycol monobutyl ether (carbon number: 8).

[0047] In the hard surface detergent composition of the present invention, from the viewpoints of cleaning performance for complex soils, formulation stability, and low damage to substrates, the mass ratio of the total content of the component (a1) and the content of the component (a2) to the content of the component (b), [(a1)+(a2)] / (b), is 0.1 or more, preferably 0.2 or more, more preferably 0.3 or more, and is 6 or less, preferably 4 or less, more preferably 1.5 or less.

[0048] The hard surface cleaning composition of the present invention may contain, for example, 1.5% by mass or more, further 2.5% by mass or more, and 7% by mass or less, further 6.5% by mass or less of component (b), while satisfying the above-mentioned mass ratio.

[0049] The cleaning composition for hard surfaces of the present invention contains water. It may be a liquid composition containing water. Water is used in an amount such that the total amount of the composition is 100% by mass.

[0050] The hard surface cleaning composition of the present invention has a pH at 20°C of 9 or more, preferably 9.5 or more, more preferably 10 or more, even more preferably 10.5 or more, and less than 12, preferably 11.5 or less, more preferably 11.3 or less, even more preferably 11 or less.

[0051] The cleaning composition for hard surfaces of the present invention may contain (c) a chelating agent (hereinafter referred to as component (c)).

[0052] There are no particular limitations on component (c), as long as it has the ability to chelate and sequester metal ions. Specific examples of component (c) include one or more chelating agents selected from the following (c1) to (c4): (c1) Amino acids such as aspartic acid, glutamic acid, and glycine, and their alkali metal salts or alkanolamine salts (c2) Aminocarboxylic acids such as nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, glycol ether diaminetetraacetic acid, hydroxyethyliminodiacetic acid, triethylenetetraminehexaacetic acid, and dienecolic acid, and their alkali metal salts or alkanolamine salts (c3) Organic acids such as diglycolic acid, oxydisuccinic acid, carboxymethyloxysuccinic acid, citric acid, lactic acid, tartaric acid, oxalic acid, malic acid, oxydisuccinic acid, gluconic acid, carboxymethylsuccinic acid, and carboxymethyltartaric acid, and their alkali metal salts or alkanolamine salts (c4) Polymers or copolymers of polyacrylic acid, acrylic acid-allyl alcohol copolymer, acrylic acid-maleic acid copolymer, hydroxyacrylic acid polymer, maleic acid, itaconic acid, fumaric acid, tetramethylene 1,2-dicarboxylic acid, succinic acid, aspartic acid, etc., and alkali metal salts or alkanolamine salts thereof

[0053] Among these, hydroxycarboxylic acid-type sequestering agents such as citric acid, malic acid, and salts thereof; aminocarboxylic acid-type sequestering agents such as ethylenediaminetetraacetic acid, hydroxyethylethylenediaminetriacetic acid, and salts thereof; and acrylic acid polymer-type sequestering agents such as polyacrylic acid, acrylic acid-maleic acid copolymer, and salts thereof are preferred. Of these, one or more selected from citric acid, ethylenediaminetetraacetic acid, and salts thereof are preferred. As the salt form, sodium salt, potassium salt, ammonium salt, and alkanolamine salt are preferred.

[0054] The hard surface cleaning composition of the present invention contains component (c) in an amount of preferably 0.5% by mass or more, more preferably 1% by mass or more, even more preferably 2% by mass or more, and preferably 5% by mass or less, more preferably 4% by mass or less, even more preferably 3% by mass or less.

[0055] The hard surface cleaning composition of the present invention may contain (d) an alkyl glyceryl ether having an alkyl group carbon number of 6 to 12 and an HLB value of 10.5 or less as determined by the Griffin method [hereinafter referred to as component (d)], from the viewpoint of enhancing the affinity of the cleaning composition for hydrophobic hard surfaces. Component (d) is preferably an alkyl monoglyceryl ether having the above alkyl group.

[0056] From the viewpoint of molecular mobility, the number of carbon atoms in the alkyl group of component (d) is 6 or more, preferably 7 or more, and 12 or less, preferably 10 or less. The alkyl group is a straight chain or branched chain, and preferably a branched chain.

[0057] From the viewpoint of increasing the affinity of the treatment composition for the hydrophobic hard surface, the HLB of component (d) is 2.5 or more, preferably 2.9 or more, more preferably 3.5 or more, even more preferably 4 or more, still more preferably 4.5 or more, still more preferably 5 or more, still more preferably 5.5 or more, still more preferably 6 or more, still more preferably 6.5 or more, still more preferably 7 or more, and is 10 or less, preferably 9 or less, more preferably 8.5 or less, and still more preferably 8 or less. (d) The HLB of component (d) is determined by Griffin's method and is calculated using the following formula: HLB value = 20 × (MH / M) ​​[MH: molecular weight of hydrophilic group moiety, M: molecular weight]

[0058] Examples of the component (d) include one or more selected from 2-ethylhexyl monoglyceryl ether (HLB: 7.4), isodecyl monoglyceryl ether (HLB: 6.4), and 2-propylheptyl monoglyceryl ether (HLB: 6.4).

[0059] The hard surface cleaning composition of the present invention can contain component (d) in an amount of, for example, 0.5% by mass or more, further 0.8% by mass or more, further 1% by mass or more, and 2.5% by mass or less, further 2% by mass or less, further 1.5% by mass or less.

[0060] The hard surface cleaning composition of the present invention may contain (e) a compound having a solubility parameter δ of 15.0 to 19.5 (hereinafter referred to as component (e)). From the viewpoint of lipid cleaning performance, the solubility parameter δ is 15.0 or more, preferably 16.0 or more, more preferably 17.0 or more, and 19.5 or less, preferably 19.0 or less, more preferably 18.5 or less, more preferably 18.0 or less. (e) The solubility parameter δ for a component is the heat of vaporization per mole of the organic solvent, ΔH (cal / mol), and the molar volume, V (cm 3 mol), δ = (ΔH / V) 1 / 2 is the value defined by δ=(ΔH / V)1 / 2 δ: Solubility parameter (sp value) [(J / cm 3 ) 1 / 2 〕 ΔH: Molar heat of vaporization V: molar volume

[0061] In determining the solubility parameter δ, the values ​​described in the following document may be used if necessary. Reference 1: Barton, AFM; CRC Handbook of SolubilityParameters and Other Cohesive Parameters 2nd Ed., p102 (CRC Press). PolymerHandbook p VII528. Reference 2: Fedors, RF; Polym. Eng. Sci., 1974, 14, (2), 147. Document 3: Meusburger, KE; “Pesticide Formulations: Innovations and Developments”, Chapter 14 (Am. Chem. Soc.), 1988, 151.

[0062] As long as the solubility parameter δ is within the above range, component (e) may have a hydroxyl group, an ether group (-O-), an amide group (-NHCO-), an ester group (-COO-), etc. Examples of component (e) include one or more selected from hydrocarbons having a total carbon number of 6 to 30, ester compounds having a carbon number of 8 to 24, and aliphatic alcohols.

[0063] In the present invention, the component (e) is preferably an ester compound having a carbon number of 6 or more and 24 or less, provided that the solubility parameter δ is within the above range. The number of carbon atoms in the ester compound is preferably 10 or more, more preferably 14 or more, and preferably 22 or less, more preferably 20 or less, from the viewpoint of lipid cleaning performance.

[0064] From the viewpoint of lipid cleaning performance, the ester compound is preferably an ester compound of a carboxylic acid and an alcohol, more preferably an ester compound of a monovalent to trivalent carboxylic acid and a monovalent to trivalent alcohol, provided that the number of carbon atoms in the ester compound satisfies the above range.

[0065] From the viewpoint of lipid cleaning performance, the number of carbon atoms of the raw carboxylic acid in the ester compound of a carboxylic acid and an alcohol is preferably 2 or more, more preferably 6 or more, even more preferably 10 or more, and preferably 21 or less, more preferably 20 or less, even more preferably 18 or less. The starting carboxylic acid in the ester compound of a carboxylic acid and an alcohol is monovalent or more and trivalent or less, preferably divalent or less, from the viewpoint of lipid cleaning performance. The raw carboxylic acid for the ester compound of a carboxylic acid and an alcohol is not particularly limited, but may be a carboxylic acid having a linear or branched alkyl or alkenyl group, such as one or more selected from acetic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, pivalic acid, caproic acid, benzoic acid, 2-ethylhexanoic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, undecylic acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, α-linolenic acid, linoleic acid, palmitoleic acid, oleic acid, adipic acid, azelaic acid, palm oil fatty acids, coconut oil fatty acids, beef tallow fatty acids, sebacic acid, and trimesic acid. Among these, from the viewpoint of lipid-cleaning performance, one or more selected from 2-ethylhexanoic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, undecylic acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, α-linolenic acid, linoleic acid, palmitoleic acid, oleic acid, adipic acid, and azelaic acid are preferred.

[0066] The number of carbon atoms in the raw material alcohol in the ester compound of a carboxylic acid and an alcohol is preferably 1 or more, more preferably 2 or more, from the viewpoint of lipid cleansing performance, and is preferably 20 or less, more preferably 18 or less, even more preferably 16 or less, still more preferably 12 or less, still more preferably 8 or less, still more preferably 6 or less, still more preferably 4 or less, and still more preferably 3 or less, from the viewpoint of blend stability. The starting alcohol in the ester compound of a carboxylic acid and an alcohol is monohydric or more and trihydric or less, preferably dihydric or less, more preferably monohydric, from the viewpoint of lipid cleaning performance. The raw material alcohol for the ester compound of carboxylic acid and alcohol is not particularly limited, but is an alcohol having a linear or branched alkyl group. Examples of the raw material alcohol include one or more selected from methanol, ethanol, propanol, isopropanol, butanol, isobutanol, pentanol, hexanol, heptanol, octanol, nonanol, decanol, dodecanol, tetradecanol, hexadecanol, octadecanol, eicosanol, and structural isomers of the alcohols. From the viewpoint of cleaning performance for lipid stains, one or more selected from methanol, ethanol, propanol, isopropanol, butanol, pentanol, hexanol, heptanol, octanol, and structural isomers of these alcohols are preferred.

[0067] The ester compound of a carboxylic acid and an alcohol is not particularly limited, but examples thereof include ester compounds of a fatty acid and an alcohol having 6 to 24 carbon atoms, and more specifically, examples thereof include one or more selected from isobutyl acetate (6 carbon atoms), ethyl hexanoate (8 carbon atoms), isobutyl isobutyrate (8 carbon atoms), ethyl octanoate (10 carbon atoms), hexyl benzoate (13 carbon atoms), diisobutyl adipate (14 carbon atoms), isopropyl myristate (17 carbon atoms), and ethyl oleate (20 carbon atoms).

[0068] From the viewpoints of lipid cleansing performance and formulation stability, component (e) is preferably one or more selected from isobutyl acetate, ethyl hexanoate, isobutyl isobutyrate, ethyl octanoate, hexyl benzoate, diisobutyl adipate, isopropyl myristate, octane, isopropyl palmitate, isopropyl stearate, limonene, 1-dodecanol, and ethyl oleate, and more preferably one or more selected from isobutyl acetate, ethyl hexanoate, ethyl octanoate, isopropyl myristate, and ethyl oleate.

[0069] From the viewpoint of lipid cleansing performance and blend stability, component (e) of the present invention is preferably an ester compound having a δ of 17.0 or more and 18.1 or less, and is preferably an ester compound of a monovalent fatty acid having 8 to 18 carbon atoms and an alcohol having 2 to 3 carbon atoms.

[0070] The hard surface detergent composition of the present invention can contain component (e) in an amount of, for example, 0.05% by mass or more, further 0.1% by mass or more, further 0.2% by mass or more, or even 0.3% by mass or more from the viewpoint of lipid cleaning performance, and 3% by mass or less, further 2.0% by mass or less, further 1.8% by mass or less, further 1.5% by mass or less, further 1% by mass or less, further 0.8% by mass or less, or even 0.6% by mass or less from the viewpoint of foam discharge ability.

[0071] The hard surface cleaning composition of the present invention may contain (f) an alkanolamine (hereinafter referred to as component (f)) from the viewpoint of aiding swelling of proteins in lipid / protein complex soils and penetrating into the proteins to improve cleaning power. As component (f), a low-molecular-weight alkanolamine is preferred, and an alkanolamine having a molecular weight of 60 or more and 300 or less, preferably 200 or less, more preferably 150 or less is suitable. Component (f) is not particularly limited, but examples include alkylmono- or dialkanolamines in which the alkanol group has 2 or 3 carbon atoms or alkylene oxide adducts thereof (the alkylene oxide has 2 or 3 carbon atoms), specific examples include one or more compounds selected from monoethanolamine, diethanolamine, triethanolamine, 1-amino-2-propanol, N-methylmonoethanolamine, N-methyldiethanolamine, and N,N-dimethylmonoethanolamine, and from the viewpoint of cleaning performance for lipid / protein complex soils, one or more selected from monoethanolamine, diethanolamine, 1-amino-2-propanol, and N-methylmonoethanolamine are preferred, and one or more selected from monoethanolamine, diethanolamine, and 1-amino-2-propanol are more preferred. The hard surface cleaning composition of the present invention may contain component (f) in an amount of, for example, 0.1% by mass or more, further 0.2% by mass or more, further 0.3% by mass or more, and 1% by mass or less, further 0.8% by mass or less, and further 0.6% by mass or less.

[0072] In wet facilities such as bathrooms, sinks, kitchens, and toilets, hard surfaces, such as materials that provide hydrophobic hard surfaces, are often used, and these environments are prone to the adhesion of complex soils derived from food and the human body. The hard surface cleaner composition of the present invention exhibits excellent detergency against complex soils adhered to hard surfaces such as bathrooms, sinks, kitchens, and toilets, and also has excellent rinsing properties. Therefore, the hard surface cleaner composition of the present invention is preferably used in bathrooms, kitchens, or toilets. Specifically, the composition of the present invention can be applied to hard surfaces around the bathroom (walls, floors, bathtubs, etc.) and hard surfaces of products used in the bathroom (bathroom chairs, washbasins, etc.). The composition of the present invention can also be applied to hard surfaces around the kitchen (walls, floors, sinks, etc.) and hard surfaces of products used in the kitchen (stoves, microwave ovens, ovens, refrigerators, etc.). The composition of the present invention can also be applied to hard surfaces in toilets (walls, floors, toilet bowls, etc.) and hard surfaces of products used in toilets (storage shelves, trash cans, etc.). Among these, it is more preferably used as a cleaning composition for hard surfaces in bathrooms.

[0073] The hard surface cleaning composition of the present invention is preferably used by spraying or applying it to a hard surface, particularly a hard surface having complex soiling. A spray means can be used for spraying or applying it. The present invention provides a hard surface cleaning article in a spray container, which is obtained by filling the hard surface cleaning composition of the present invention into a container equipped with a sprayer.

[0074] In the spray-container-packaged hard surface cleaner article of the present invention, the container equipped with a sprayer into which the hard surface cleaner composition of the present invention is filled may be a manual spray device that does not use a propellant, such as a trigger-type spray container or a pump-type spray container, or an aerosol that uses a propellant. The container equipped with the sprayer is preferably a trigger-type spray that can spray or apply the contents in the form of droplets or foam.

[0075] When a trigger-type spray equipped with a mechanism for spraying the hard surface cleaner composition of the present invention in droplets is used in the spray-bottled hard surface cleaner article of the present invention, the nozzle diameter of the spray container containing the composition is preferably 0.1 mm or more, more preferably 0.3 mm or more, and preferably 2 mm or less, more preferably 1 mm or less, so as to facilitate spraying, to prevent the sprayed droplets from being rough, not sprayed in a straight line, and to prevent the spray area from being extremely narrow. When using a trigger-type sprayer equipped with a mechanism for spraying droplets, the spray-container hard surface cleaner article of the present invention sprays preferably 0.1 mL or more, more preferably 0.3 mL or more, and preferably 5 mL or less, more preferably 2 mL or less of the composition in one operation.

[0076] Furthermore, the spray-container-packaged hard surface cleaner article of the present invention can use a trigger-type sprayer having a foam-forming mechanism. The trigger-type sprayer having a foam-forming mechanism is preferably a direct pressure type or an accumulated pressure type, more preferably an accumulated pressure type. When using a trigger-type sprayer with a foam-forming mechanism, it is preferable to use one having a spin element and a liquid passage plate having several rod-shaped protrusions disposed in a circular space having a diameter of 4 to 8 mm. Here, the spin element is a mechanism that imparts spin to a liquid flow through the spin element and finally sprays the liquid from a nozzle. For detailed structure, reference can be made to Figure 4(b) of JP-A-8-332422 and JP-A-8-108102, Figure 1 of JP-A-2002-68265, etc.

[0077] When using a trigger-type spray equipped with a foam-forming mechanism, the spray-contained hard surface cleaner article of the present invention sprays, in one operation, preferably 0.5 mL or more, more preferably 1 mL or more, and preferably 30 mL or less, more preferably 15 mL or less, and even more preferably 5 mL or less of the composition.

[0078] The liquid passage plate, another component of the foam-forming mechanism, has preferably 3 to 8 rod-shaped protrusions arranged in a circular space with a diameter of 5 to 7 mm, and when viewed from above, the rod-shaped protrusions are preferably rectangular with a width of 0.8 to 1.2 mm and a length of 2 to 4 mm. The area occupied by the rod-shaped protrusions relative to the space excluding the rod-shaped protrusions is preferably 30% or more, more preferably 40% or more, and preferably 90% or less, more preferably 80% or less, and even more preferably 70% or less. Installing such a liquid passage plate improves the adhesion and retention of foam on vertical surfaces.

[0079] The container of the spray-container hard surface cleaner article of the present invention can be a commonly used container. For example, it can be made from polyethylene, polypropylene, or polyethylene terephthalate, and can be manufactured by blow molding or the like. The thickness of the container may differ between the bottom and sides, and is preferably 0.01 to 2 mm, and the container capacity is preferably 100 to 1000 mL. For ease of handling, the amount of hard surface cleaner composition filled into the container is preferably 200 to 500 mL. Furthermore, the liquid is filled while leaving a reasonable amount of space.

[0080] [Method for cleaning hard surfaces] The method for cleaning a hard surface of the present invention is a method for cleaning a hard surface in which the above-described detergent composition for hard surfaces of the present invention is applied to the hard surface, and then the surface is rinsed without scrubbing. That is, the method for cleaning hard surfaces of the present invention uses the detergent composition for hard surfaces of the present invention. Preferred embodiments of the composition are the same as those of the detergent composition for hard surfaces of the present invention described above. The method for cleaning a hard surface of the present invention can be suitably carried out as a method for cleaning a hard surface by applying the detergent composition for hard surfaces of the present invention to a hard surface, for example, a hard surface having complex soiling attached thereto, and then rinsing the surface without scrubbing.

[0081] In the method for cleaning a hard surface of the present invention, the hard surface detergent composition is applied to the hard surface, preferably in a foam state. In the present invention, the hard surface detergent composition is preferably foamed using a trigger sprayer having a foam-forming mechanism. The trigger sprayer is preferably a pressure-accumulator sprayer. The trigger sprayer having a foam-forming mechanism may be any of those described in connection with the hard surface detergent composition of the present invention.

[0082] More specifically, the hard surface cleaning method of the present invention includes a cleaning method in which the hard surface detergent composition is applied to a hard surface in its undiluted form, or a cleaning method in which the hard surface detergent composition is applied to a hard surface in its undiluted form, i.e., a cleaning method in which the hard surface detergent composition is applied to a hard surface without dilution.Furthermore, a cleaning method in which the hard surface detergent composition is applied to a hard surface without dilution is also included. The phrase "adhering the hard surface cleaner composition to a hard surface without dilution" means that the cleaner composition is not adhered to a hard surface after being intentionally diluted with water, etc. For example, when the cleaner composition is adhered to a hard surface having water droplets or the like attached thereto, or when water droplets adhere to the hard surface after the cleaner composition for hard surfaces is attached to the hard surface, it can be understood that the cleaner composition for hard surfaces is adhered to the hard surface without dilution. In the present invention, it is preferable to apply the undiluted solution of the hard surface cleaning composition to a hard surface as it is, i.e., without changing the composition. For example, the hard surface cleaning composition is applied to a hard surface having dirt attached thereto, without being applied to a wet sponge. After being applied to a hard surface, the composition of the hard surface cleaning composition may change. That is, after being applied to a hard surface, the composition of the hard surface cleaning composition may be diluted or concentrated.

[0083] However, a concentrated composition containing component (a) including component (a1) and component (a2) of the present invention and component (b) may be prepared in advance, and the concentrated composition may be diluted with water to prepare the hard surface cleaning composition of the present invention, which may then be applied to a hard surface. That is, a method for cleaning a hard surface may also be used in which a concentrated composition containing component (a) including component (a1) and component (a2) of the present invention and component (b) is diluted with water to prepare the hard surface cleaning composition of the present invention, and the hard surface cleaning composition is applied to the hard surface, followed by rinsing without scrubbing. The concentrated composition may contain optional components such as components (c) to (f).

[0084] Furthermore, the hard surface cleaning method of the present invention may include a cleaning method in which the hard surface detergent composition is applied to a hard surface and then rinsed without scrubbing, preferably by applying the composition to the hard surface, leaving it for a predetermined time, and then rinsing without scrubbing. That is, a cleaning method in which the composition is applied without scrubbing using a flexible material such as a sponge or fingers, and then left as is without applying external force may be included. After applying the composition and leaving it for a predetermined time if necessary, the hard surface is rinsed with water. When rinsing, external force (physical force) may be applied using hands, or simply rinsed with a stream of water.

[0085] In the method for cleaning a hard surface of the present invention, the cleaning composition for hard surfaces is applied to an area of ​​100 cm of the hard surface to be cleaned. 2 It is preferable to adhere, furthermore apply or spray, at a ratio of preferably 0.1 g or more, more preferably 0.3 g or more, even more preferably 0.4 g or more, and preferably 5 g or less, more preferably 3 g or less, even more preferably 2 g or less.

[0086] In the method for cleaning a hard surface of the present invention, from the viewpoint of enhancing detergency against complex soils, the hard surface detergent composition is left to stand after application to the hard surface for preferably 10 seconds or more, more preferably 20 seconds or more, even more preferably 30 seconds or more, even more preferably 40 seconds or more, and from the same viewpoint, preferably 60 minutes or less, more preferably 30 minutes or less, even more preferably 20 minutes or less, even more preferably 10 minutes or less. In this case, the time when the composition first adheres to the hard surface may be considered the start of the leaving period. The predetermined time may be within this range. The temperature during storage may be room temperature, for example, 10°C or higher and 30°C or lower.

[0087] Furthermore, in the method for cleaning hard surfaces of the present invention, from the viewpoint of enhancing cleaning power against complex soils, the liquid detergent composition is adhered to the hard surface to be cleaned for preferably 10 seconds or more, more preferably 20 seconds or more, even more preferably 30 seconds or more, and even more preferably 40 seconds or more, and from the same viewpoint, preferably 60 minutes or less, more preferably 30 minutes or less, even more preferably 20 minutes or less, and even more preferably 10 minutes or less.

[0088] In the method for cleaning a hard surface of the present invention, the hard surface to which dirt has adhered may be immersed in the detergent composition for hard surfaces to adhere the composition. However, from the viewpoint of efficiently enhancing the detergency against complex soils, a method of adhering the detergent composition for hard surfaces to the hard surface to which dirt has adhered by spraying or applying the composition is preferred. In the present invention, it is preferred to adhere the detergent composition for hard surfaces to the hard surface in the form of a foam. The method for applying the hard surface cleaner composition to a soiled hard surface is preferably spraying or coating, and more preferably spraying in the form of droplets or coating in the form of foam. Preferably, the above-mentioned spray-container-packed hard surface cleaner article of the present invention is used.

[0089] The method for cleaning hard surfaces of the present invention is preferably used as a method for cleaning bathrooms, kitchens or toilets, and more preferably as a method for cleaning bathrooms.

[0090] In the method for cleaning a hard surface of the present invention, the hard surface cleaner composition of the present invention is directly applied to the hard surface, and the hard surface is left in the state where the composition is applied. Therefore, there is no need to apply an external force during cleaning, such as scrubbing with a flexible material such as a sponge. Furthermore, in the method for cleaning a hard surface of the present invention, the detergent composition for hard surfaces of the present invention, preferably the foamed composition, is applied to a hard surface and left as is, so that the composition can remain on the hard surface for a long time. In the method for cleaning hard surfaces of the present invention, the hard surface to which the cleaning composition for hard surfaces has been applied is rinsed with water. Preferably, the hard surface to which the cleaning composition for hard surfaces has been applied is left for a predetermined period of time and then rinsed with water. The cleaning composition for hard surfaces of the present invention has good rinsing properties, so that rinsing can be completed with a small amount of water. [Example]

[0091] The components shown in the table were blended to prepare cleaning compositions for hard surfaces. The pH (20°C) of each composition was adjusted with hydrochloric acid or sodium hydroxide. These compositions were evaluated for formulation stability, detergency, low substrate damage, and rinsability using the following methods. The results are shown in the table.

[0092] <Formulation stability> A cleaning performance composition was prepared, filled into a 100 mL PET bottle (K-120) manufactured by AS ONE Corporation, sealed, and left to stand at room temperature (25°C) for one day. The appearance was then visually observed and evaluated according to the following criteria. A rating of "B" or higher on the following criteria was considered to be acceptable.

[0093] A: Uniform and transparent, with no separation of components, layers, or turbidity. B: Slightly cloudy but homogeneous liquid without separation C: Clearly cloudy or stratified

[0094] <Model complex dirt cleaning power> A model complex soil solution was prepared by dissolving 10% by mass of model sebum soil (based on the composition of complex soil found in bathroom bathtubs) and 1% by mass of keratin (derived from wool, manufactured by TCI) in chloroform. A polypropylene plate (7 cm x 2 cm) was immersed in this solution for 10 seconds while stirring well, forming a film of the model complex soil on the plate, which was then allowed to dry naturally overnight. The model sebum stain had a composition of 40% by mass of linoleic acid, 20% by mass of oleic acid, 20% by mass of palmitic acid, 10% by mass of cholesterol, and 10% by mass of liquid paraffin. 10 μL of the hard surface detergent composition shown in the table was dropped onto the stained area of ​​the plate, left to stand at 25°C for 1 minute, then rinsed with water, and the detergency was evaluated visually according to the following criteria. A score of "Good" or better according to the following criteria was considered to be acceptable.

[0095] ◎: All dirt was removed from the area where the liquid was dropped without scrubbing. 〇: Without scrubbing, not all of the dirt on the area where the liquid was dropped was removed, but more than half of the dirt was removed. △: The stains on the areas where the liquid was dropped were removed without scrubbing, but only less than half of the stains were removed. ×: Almost no dirt was removed from the area where the liquid was dropped without scrubbing.

[0096] <Rinseability> A container of a commercially available spray-type bathroom cleaner (Kao Corporation, Bath Magiclean) was cleaned and used. The container was filled with the hard surface cleaner composition. 5 g of foam was generated in a 500 mL graduated cylinder by pulling the trigger of the container five times. The pulling speed was 1 second per pull. The volume was recorded from the graduations on the graduated cylinder. This was the initial foam volume. Next, 50 mL of 3.5°DH hard water was added to the foam through a hard water introduction means (a homemade watering can) placed on top of the measuring cylinder, and 50 mL of hard water was added every minute. This operation was repeated nine times (50 mL of hard water was added nine times, for a total addition amount of 450 mL). After each 50 mL of hard water addition, the foam volume was measured 30 seconds after the entire amount of hard water was added. This was taken as the foam volume after hard water addition. Figure 1 shows the state when hard water was added to the measuring cylinder. In Figure 1, 1 is the measuring cylinder, 2 is the foam, 3 is the hard water introduction means (the homemade watering can), and 4 is the opening of the introduction means. Figure 2 is a schematic diagram showing the perforated state of the opening 4 of the hard water introduction means 3. The method for making a homemade watering can, which is a means for introducing hard water, is as follows. First, a 250 mL wide-mouth polypropylene bottle (I-Boy wide-mouth bottle, manufactured by AS ONE) was cut away from the bottom to about one-third of the height of the body. Next, a thin, circular polyethylene plate with a diameter of 4 cm was prepared by drilling 13 2 mm diameter holes at 9 mm intervals, as shown in Figure 2. Finally, the polyethylene plate was fixed as opening 4 to the opening (4 cm diameter) of the lid at the top of the cut-out wide-mouth bottle, thereby making a means for introducing hard water 3 (homemade watering can). The hard water introduction means 3 (homemade watering can) made in this way was fitted into the opening of a measuring cylinder 1 while held upside down, as shown in Figure 1. Hard water was added from the cut-out side of the wide-mouth bottle. The foam volume change rate shown in the following formula was calculated from the initial foam volume and the foam volume after adding hard water, and the defoaming property was evaluated. The less hard water added, the better the defoaming property, and the better the foam volume change rate was, with a rating of "Good" according to the following criteria. Foam volume change rate (%) = [1 - (foam volume after adding hard water / initial foam volume)] x 100

[0097] When the amount of hard water added at which the rate of change in foam volume was 50% or less was 250 mL or less (five or fewer hard water addition operations), it was evaluated as "○" as it was possible to achieve rapid defoaming; when the amount of hard water added at which the rate of change in foam volume was 50% or less was 300 mL (six hard water addition operations), it was evaluated as "△" as it was possible to achieve fairly rapid defoaming; and when the amount of hard water added at which the rate of change in foam volume was 50% or less was 350 mL or more (seven or more hard water addition operations), it was evaluated as "×" as it was not possible to achieve rapid defoaming.

[0098] <Low damage to base material> A polycarbonate (hereinafter referred to as PC) plate (70 mm × 10 mm × 1 mm, manufactured by Nippon Test Panel Co., Ltd.) was attached to fit the surface shape of an Eye-Boy 250 mL (manufactured by AS ONE Co., Ltd.) to induce distortion (distortion rate: 16.6%). A piece of absorbent cotton cut into eight pieces and then cut to half its thickness was placed on the distorted PC plate, and the absorbent cotton was impregnated with 200 μL of cleaning solution and left to stand for 8 hours. After that, the surface condition of the PC plate was visually observed, and the substrate damage was evaluated according to the following criteria.

[0099] Pass: The PC plate does not break, or cracks are visible but not broken. Fail: PC plate cracks

[0100] [Table 1]

[0101] [Table 2]

[0102] The ingredients in the table are as follows: AES: Polyoxyethylene (average number of moles added: 4.0) alkyl (carbon number: 10-16) ether sulfate sodium salt EC: Kao Akipo RLM-45NV (polyoxyethylene (average number of moles added: 4.5) sodium lauryl ether acetate), manufactured by Kao Corporation: Trimethyldecylammonium chloride: manufactured by Tokyo Chemical Industry Co., Ltd. Amphoteric surfactant: Amphitol 20AB (lauric acid amidopropyl betaine), manufactured by Kao Corporation Nonionic surfactant (1): Softanol 70H, manufactured by Nippon Shokubai Co., Ltd. Nonionic surfactant (2): Softanol 33, manufactured by Nippon Shokubai Co., Ltd. Butyl diglycol: Nippon Nyukazai Co., Ltd. Ethyl oleate: carbon number 20, solubility parameter δ: 18.1, manufactured by Tokyo Chemical Industry Co., Ltd. In the table, (a1)+(a2) (mass %) is the total amount of the content of the component (a1) and the content of the component (a2) in the composition.

Claims

1. (a) A surfactant (hereinafter referred to as component (a)), a glycol-based solvent (hereinafter referred to as component (b)), and water are contained, The component (a) contains (a1) decyldimethylbenzyl ammonium salt (hereinafter referred to as component (a1)) and (a2) an anionic surfactant (hereinafter referred to as component (a2)), The total content of the (a1) component and the (a2) component is more than 0.5% by mass and less than 6.5% by mass, the mass ratio (a1) / (a2) of the content of the component (a1) to the content of the component (a2) is 0.1 or more and 10 or less; the mass ratio of the total content of the component (a1) and the component (a2) to the content of the component (b), [(a1) + (a2)] / (b), is 0.1 or more and 6 or less; The pH at 20°C is 9.5 or more and less than 11.

5. Cleaning compositions for hard surfaces.

2. 2. The cleaning composition for hard surfaces according to claim 1, comprising, as component (a2), a fatty acid having from 8 to 22 carbon atoms or a salt thereof.

3. The cleaning composition for hard surfaces according to claim 1 or 2, further comprising (c) a chelating agent.

4. The hard surface cleaning composition according to any one of claims 1 to 3, further comprising (d) an alkyl glyceryl ether having an alkyl group having 6 to 12 carbon atoms and an HLB of 10.5 or less as determined by the Griffin method.

5. The cleaning composition for hard surfaces according to any one of claims 1 to 4, further comprising (e) a compound having a solubility parameter δ of 15.0 or more and 19.5 or less.

6. The hard surface cleaning composition according to any one of claims 1 to 5, further comprising (f) an alkanolamine.

7. A method for cleaning a hard surface, comprising applying the hard surface cleaner composition according to any one of claims 1 to 6 to the hard surface, and then rinsing the surface without scrubbing.

8. The method for cleaning a hard surface according to claim 7, wherein the hard surface cleaning composition is applied to the hard surface in a foam state.

9. The method for cleaning a hard surface according to claim 8, wherein the hard surface cleaning composition is foamed using a trigger-type sprayer having a foam-forming mechanism.

10. 10. The method for cleaning a hard surface according to claim 9, wherein the trigger sprayer is a pressure-accumulation sprayer.

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