JP7820176B2 - Cleaning composition for hard surfaces - Google Patents

Description

The present invention relates to a cleaning composition for hard surfaces and a method for cleaning hard surfaces.

Hard surfaces such as those in bathrooms accumulate complex dirt composed of lipids (such as sebum) and proteins (such as keratin derived from hair). In recent years, modular baths have become commonplace, and bathroom materials such as polyester and acrylic resins are now being used. The lipid and protein dirt that adheres to these hydrophobic surfaces is difficult to remove. To remove such dirt, people apply a 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 is 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.

Patent Document 1 discloses a technology in which a specific anionic surfactant and a cationic surfactant are blended to provide a cleaning agent that has high disinfecting and cleaning power while also having excellent storage stability and does not produce insoluble matter such as precipitates.
Patent Document 2 discloses a liquid detergent composition that contains, in specific ratios, (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, 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.

Japanese Patent Application Laid-Open No. 2020-147656 Japanese Patent Application Laid-Open No. 2005-290049 Japanese Patent Application Laid-Open No. 2003-183698 Japanese Patent Application Laid-Open No. 2002-241790 Japanese Patent Application Publication No. 9-53092

However, when cleaning hard surfaces, a variety of complex soils adhere. For example, as mentioned above, lipids and proteins are difficult to remove, and when these are combined, the soiling becomes even more difficult to remove. Furthermore, in addition to cleaning power, detergent compositions are also required to be easy to rinse after cleaning, cause minimal damage to the substrate being cleaned, and be stable when formulated. To date, no detergent composition for hard surfaces that comprehensively satisfies all of these requirements has been found.

The present invention provides a cleaning composition for hard surfaces that has excellent detergency, rinsability, low substrate damage, and formulation stability against complex stains such as lipids and proteins adhering to hard surfaces, and a method for cleaning hard surfaces using the same.

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% 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 or more and less than 12.
The present invention relates to a cleaning composition for hard surfaces.

[In the formula, R represents an alkyl group having 8 to 18 carbon atoms, and X ⁻ represents a counter ion.]

The present invention also relates to a method for cleaning hard surfaces, in which the hard surface cleaning composition of the present invention is applied to a hard surface and then rinsed without scrubbing.

The present invention provides a hard surface cleaning composition that exhibits excellent detergency, rinsability, low substrate damage, and formulation stability against complex soils of lipids and proteins adhering to hard surfaces (hereinafter sometimes simply referred to as complex soils), as well as a method for cleaning hard surfaces using the same. The hard surface cleaning composition of the present invention is low in damage to substrates even when it has a weakly alkaline composition.

Schematic diagram showing the method for evaluating rinsing performance in the examples Schematic diagram showing the perforation state of the hard water introduction means (watering can) used in the evaluation of rinsing performance in the examples.

[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 component (a1) and the 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 or more and less than 12.

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 preferred for its bactericidal properties:

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

In the above formula, the number of carbon atoms in R is preferably 10 or more from the viewpoint of enhancing the detergency for complex soils, and is preferably 10 or less from the viewpoint of further enhancing the rinsability. In the above formula, the number of carbon atoms in R is preferably 10 from the viewpoint of further enhancing the detergency for complex soils and the rinsability.
In the above formula, X ^{1 −} is a counter ion, and examples thereof include halogen ions such as chloride ions, alkylsulfonate ions such as methanesulfonate and ethanesulfonate, and alkylsulfate ions such as methylsulfate and ethylsulfate, with chloride ions being preferred.

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.

From the viewpoint of further enhancing the cleaning power and rinsing ability for complex soils, the hard surface cleaning composition of the present invention preferably contains decyldimethylbenzylammonium salt as component (a1).

The hard surface cleaning composition of the present invention contains component (a2) as component (a). Component (a2) is an anionic surfactant.
Component (a2) includes an anionic surfactant having one or more hydrocarbon groups and one or more groups selected from the group consisting of sulfonic acid groups, sulfate ester groups, and carboxylic acid groups. 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 alkyl groups and alkenyl groups. The hydrocarbon group may be linear or branched.

Examples of component (a2) include fatty acids or their salts, polyoxyalkylene alkyl or ether sulfates, alkyl or alkenyl sulfates, polyoxyalkylene alkyl or alkenyl ether carboxylates, internal olefin sulfonates, and alkylbenzene sulfonates. These may have the aforementioned hydrocarbon groups.

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 the fatty acid salt include alkali metal salts such as sodium salts and potassium salts, and alkaline earth metal salts, with alkali metal salts being preferred.

The fatty acid of component (a2) is preferably a fatty acid having 8 or more carbon atoms, preferably 10 or more, more preferably 12 or more, and 22 or less, more preferably 18 or less, and even more preferably 16 or less. In other words, 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.

Other (a2) components include, for example, polyoxyalkylene alkyl or alkenyl ether sulfate esters or salts thereof, olefin sulfonates, polyoxyalkylene alkyl or alkenyl ether acetate esters or salts thereof, etc.

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 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.

Examples of olefin sulfonic acids or salts thereof include internal olefin sulfonic acids or salts thereof. The number of carbon atoms in the olefin portion 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. Furthermore, alkali metal salts such as sodium salts and potassium salts are preferred.

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.

The hard surface cleaning composition of the present invention preferably contains a fatty acid or a salt thereof having 8 to 22 carbon atoms as component (a2). In the hard surface cleaning composition of the present invention, the proportion of the fatty acid or a salt thereof having 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.

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 the amount based on the compound in which the counter ion is replaced with chloride ion (Cl ⁻ ), i.e., the amount calculated as chloride. In addition, in the present invention, the amount of fatty acid or its salt in component (a2) is the amount based on the acid-type compound, i.e., the amount calculated as acid-type compound, and the amount of other anionic surfactants is the amount based on the compound in which the counter ion is replaced with sodium ion (Na ⁺ ), i.e., the amount calculated as sodium salt.

From the viewpoint of detergency and rinsability against complex soils, the hard surface cleaning composition of the present invention has a mass ratio (a1)/(a2) of the content of component (a1) to the content of component (a2), which is 0.1 or more, preferably 0.5 or more, more preferably 1 or more, and 10 or less, preferably 8 or less, more preferably 7 or less.

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

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

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

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.

Nonionic surfactants are 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 standpoints of detergency, foaming, and rinsing ability against complex soils. The number of carbon atoms in these alkyl or alkenyl groups may be 8 to 22. Among these, from the viewpoints 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. Polyoxyethylene alkyl or alkenyl ethers in which an average of more than 0 moles but not more than 30 moles of alkylene oxide having 2 to 4 carbon atoms are added to a primary or secondary alcohol having 8 to 18 carbon atoms are more preferred, and polyoxyethylene alkyl or alkenyl ethers in which an average of more than 1 mole but not more than 20 moles of alkylene oxide having 2 to 4 carbon atoms are added to a secondary alcohol having 10 to 16 carbon atoms are even more preferred. Two or more of the nonionic surfactants listed here may also be used in combination.

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

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 contains component (a3) in an amount of preferably 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.

In the hard surface cleaning composition of the present invention, the proportion of the content of component (a1) in the total content of 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, or further 40% by mass or less.

In the hard surface cleaning composition of the present invention, the proportion of the content of component (a2) in the total content of 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, or further 15% by mass or less.

The total content of component (a) in the hard surface cleaning composition of the present invention 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, or further 8% by mass or less.

Component (b) is a glycol-based solvent. Regarding component (b), a 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. Furthermore, an ether compound in which one hydrogen atom of a hydroxyl group of a glycol compound is substituted with another group is preferred.

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

From the viewpoint of cleaning power against complex soils, 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, the total number of carbon atoms is preferably 12 or less, preferably 10 or less, and more preferably 8 or less.

In terms of cleaning power against complex soils, examples of component (b) 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).

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 preferably has 1 to 4 carbon atoms, and is methyl, ethyl, various propyl groups, or various butyl groups. The various groups include normal, iso, and tertiary groups.

In terms of cleaning power, the hard surface cleaning 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 to include diethylene glycol monobutyl ether (carbon number: 8) as component (b).

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

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.

The hard surface cleaning composition 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.

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.

The hard surface cleaning composition of the present invention may contain (c) a chelating agent (hereinafter referred to as component (c)).

Component (c) is not particularly limited 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, glycine, etc., and alkali metal salts or alkanolamine salts thereof; (c2) aminocarboxylic acids such as nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, glycoletherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid, triethylenetetraminehexaacetic acid, dienolic acid, etc., and alkali metal salts or alkanolamine salts thereof; (c3) diglycolic acid, oxydisuccinic acid, carboxymethyloxycobalamin, etc. Organic acids such as citric 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, and aspartic acid, and their alkali metal salts or alkanolamine salts.

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 for the salt form, sodium salt, potassium salt, ammonium salt, and alkanolamine salt are preferred.

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.

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

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 may be linear or branched, and preferably branched.

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.
The HLB of component (d) is the HLB determined by Griffin's method and is calculated using the following formula.
HLB value = 20 × (MH/M) [MH: molecular weight of hydrophilic group portion, M: molecular weight]

Component (d) may be 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).

The hard surface cleaning composition of the present invention may 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, and 2.5% by mass or less, further 2% by mass or less, and further 1.5% by mass or less.

The hard surface cleaning composition of the present invention may contain (e) a compound having a solubility parameter δ of 15.0 or more and 19.5 or less (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.
The solubility parameter δ for component (e) is a value defined by δ = (ΔH/V) 1/2, where ΔH (cal/mol) is the heat of vaporization per ^mole of the organic solvent and V (cm ³ ·mol) is the molar volume.
δ=(ΔH/V)1/2
δ: Solubility parameter (sp value) [(J/cm ³ ) ^1/2 ]
ΔH: Molar heat of vaporization V: Molar volume

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.
Reference 3: Meusburger, KE; “Pesticide Formulations: Innovations and Developments”, Chapter 14 (Am. Chem. Soc.), 1988, 151.

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

In the present invention, the component (e) is preferably an ester compound having a carbon number of 6 to 24. However, the solubility parameter δ must be 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.

From the viewpoint of lipid cleaning performance, the ester compound is preferably an ester compound of a carboxylic acid and an alcohol, and more preferably an ester compound of a monovalent to trivalent carboxylic acid and a monovalent to trivalent alcohol. However, the number of carbon atoms in the ester compound must satisfy the above range.

From the viewpoint of lipid cleaning performance, the number of carbon atoms of the raw material 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 is 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.

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 a carboxylic acid and an 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.

The ester compound of a carboxylic acid and an alcohol is not particularly limited, but includes an ester compound of a fatty acid and an alcohol having 6 to 24 carbon atoms. More specifically, it includes 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).

From the standpoint 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.

From the viewpoint of lipid cleansing performance and formulation stability, component (e) of the present invention is preferably an ester compound with a δ of 17.0 to 18.1, 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.

The hard surface cleaning 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.

The hard surface detergent composition of the present invention may contain (f) an alkanolamine (hereinafter referred to as component (f)) from the viewpoints of promoting swelling of proteins in lipid/protein complex soils and penetrating the proteins to improve detergency.
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, preferably one or more compounds selected from monoethanolamine, diethanolamine, 1-amino-2-propanol, and N-methylmonoethanolamine, more preferably one or more compounds selected from monoethanolamine, diethanolamine, and 1-amino-2-propanol.
The hard surface cleaning composition of the present invention can 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.

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 the 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 the 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 the hard surfaces of products used in toilets (storage shelves, trash cans, etc.). In particular, it is more preferably used as a cleaning composition for hard surfaces in bathrooms.

The hard surface cleaning composition of the present invention is preferably sprayed or applied to contact a hard surface, particularly a hard surface with complex soiling. A spray means can be used for spraying or application. The present invention provides a hard surface cleaning product 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.

The sprayer-equipped container for the hard surface cleaner article of the present invention, which is filled with the hard surface cleaner composition of the present invention, can 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 sprayer-equipped container is preferably a trigger-type spray that can spray or apply the contents in the form of droplets or foam.

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, from being sprayed in a straight line, and to prevent the sprayable 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.

The spray-container hard surface cleaner article of the present invention can also use a trigger-type sprayer with a foam-forming mechanism. Trigger-type sprayers with a foam-forming mechanism are preferably direct pressure or pressure-accumulation types, with pressure-accumulation types being more preferred. When using a trigger-type sprayer with a foam-forming mechanism, it is preferable to use one that has a spin element and a liquid-passing plate with several rod-shaped protrusions installed in a circular space with a diameter of 4 to 8 mm. The spin element here refers to a mechanism that imparts spin to a liquid flow through the spin element, which is then finally sprayed out from a nozzle. For detailed structural details, see JP-A-8-332422, JP-A-8-108102 (FIG. 4(b)), JP-A-2002-68265 (FIG. 1), etc.

When using a trigger-type sprayer equipped with a foam-forming mechanism, the spray-container hard surface cleaner article of the present invention sprays 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 in one operation.

The liquid passage plate, another component of the foam-forming mechanism, has preferably 3 to 8 rod-shaped protrusions installed in a circular space with a diameter of 5 to 7 mm. When viewed in plan, the rod-shaped protrusions are preferably rectangular, measuring 0.8 to 1.2 mm wide and 2 to 4 mm long. Furthermore, 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.

The container for 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's bottom and sides may differ, and is preferably 0.01 to 2 mm, and the container's capacity is preferably 100 to 1,000 mL. For ease of handling, the amount of hard surface cleaner composition filled into the container is preferably 200 to 500 mL. The liquid is filled while leaving a reasonable amount of space.

[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.

In the method for cleaning hard surfaces of the present invention, the hard surface cleaning composition is applied to the hard surface, preferably in a foamed state. In the present invention, the hard surface cleaning 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 can be any of the trigger sprayers described in connection with the hard surface cleaning composition of the present invention.

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.

However, a concentrated composition containing components (a) and (b), including components (a1) and (a2) of the present invention, 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 hard surfaces may also be used in which a concentrated composition containing components (a) and (b), including components (a1) and (a2) of the present invention, 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 also contain optional components such as components (c) to (f).

The hard surface cleaning method of the present invention also includes a cleaning method in which the hard surface cleaner 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 period of time, and then rinsing without scrubbing. In other words, the cleaning method includes applying the composition to the hard surface without scrubbing with a flexible material such as a sponge or with fingers, and leaving it as is without applying any external force. After applying the composition and leaving it for a predetermined period of time if necessary, the hard surface is rinsed with water. When rinsing, external force (physical force) may be applied using hands, or the hard surface may simply be rinsed with a stream of water.

In the method for cleaning a hard surface of the present invention, the hard surface cleaner composition is preferably adhered, ^further preferably applied or sprayed, in an amount 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 per 100 cm2 of the area of the hard surface that is the target.

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, still 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, still 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.

Furthermore, in the method for cleaning hard surfaces of the present invention, from the viewpoint of enhancing detergency 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.

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.

The hard surface cleaning method of the present invention is preferably used as a method for cleaning bathrooms, kitchens, or toilets, and is particularly suitable as a method for cleaning bathrooms.

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.

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 blend stability, detergency, low substrate damage, and rinsability using the following methods. The results are shown in the table.

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

A: Uniform and transparent, with no separation of components, layers, or turbidity. B: Slightly cloudy but no layers, uniform liquid. C: Clearly cloudy or layers are visible.

<Model complex dirt cleaning power>
A model complex soil solution was prepared by dissolving 10% by mass of model sebum soil (prepared based on the composition of complex soil adhering to a bathroom bathtub) 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.

◎: All dirt was removed from the area where the liquid was dropped without scrubbing. ○: All dirt was not removed from the area where the liquid was dropped without scrubbing, but more than half of the dirt was removed. △: Dirt was removed from the area where the liquid was dropped without scrubbing, but only less than half of the dirt was removed. ×: Almost no dirt was removed from the area where the liquid was dropped without scrubbing.

<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 trigger was pulled five times at a speed of 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 (homemade watering can) installed 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 total 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 foam, 3 is the hard water introduction means (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 preparing a homemade watering can as 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 approximately 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 perforated 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 preparing a means for introducing hard water 3 (homemade watering can). The hard water introduction means 3 (homemade watering can) thus prepared was fitted into the opening of a measuring cylinder 1 while held in an inverted position, as shown in Figure 1 . Hard water was poured into 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 defoaming property was better when the amount of hard water added was smaller, at which the foam volume change rate was 50% or less, and the product was evaluated as passing 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

When the amount of hard water added that resulted in a foam volume change rate of 50% or less was 250 mL or less (five or fewer hard water addition operations), it was evaluated as "○" and rapid defoaming was achieved; when the amount of hard water added that resulted in a foam volume change rate of 50% or less was 300 mL (six hard water addition operations), it was evaluated as "△" and relatively rapid defoaming was achieved; and when the amount of hard water added that resulted in a foam volume change rate of 50% or less was 350 mL or more (seven or more hard water addition operations), it was evaluated as "×" and rapid defoaming was not achieved.

<Low damage to base material>
A polycarbonate (hereinafter referred to as PC) plate (70 mm x 10 mm x 1 mm, manufactured by Nippon Test Panel Co., Ltd.) was attached to the surface of an Eye Boy 250 mL (manufactured by AS ONE Co., Ltd.) to create a 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 200 μL of cleaning solution was impregnated into the absorbent cotton and allowed to stand for 8 hours. The surface condition of the PC plate was visually observed, and the substrate damage was evaluated according to the following criteria.

Pass: The PC plate does not break, or cracks can be seen but it does not break Fail: The PC plate breaks

The ingredients in the table are as follows:
AES: Polyoxyethylene (average number of added moles: 4.0) alkyl (carbon number: 10 to 16) ether sulfate sodium salt EC: Kao Akipo RLM-45NV (polyoxyethylene (average number of added moles: 4.5) lauryl ether sodium 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: manufactured by 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 component (a1) and the content of component (a2) in the composition.

Claims (10)

(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. 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. The cleaning composition for hard surfaces according to claim 1 or 2 , further comprising (c) a chelating agent. The cleaning composition for hard surfaces 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. 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. The cleaning composition for hard surfaces according to any one of claims 1 to 5 , further comprising (f) an alkanolamine. A method for cleaning a hard surface, comprising applying the hard surface cleaning composition according to any one of claims 1 to 6 to the hard surface, and then rinsing the surface without scrubbing. 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. 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. The method for cleaning a hard surface according to claim 9 , wherein the trigger sprayer is a pressure-accumulation sprayer.