Liquid detergent composition for hard surface

Abstract

To provide a liquid detergent composition for hard surfaces and a cleaning sheet for hard surfaces that, when an alkaline liquid detergent composition is brought into contact with hard surfaces including metal surfaces such as aluminum and wiped off with a nonwoven fabric or woven fabric, or when cleaning is performed using a cleaning sheet comprising the liquid cleaning composition and a nonwoven or woven fabric, suppress discoloration due to corrosion of the metal on the hard surface and also suppress white residue on the hard surface.SOLUTION: A liquid detergent composition for hard surfaces comprises:(a) α-hydroxycarboxylic acids and / or their salts having a molecular weight of 210 or less and containing one or two carboxyl groups, (b) silicates, (c) alkalis other than component (b), and water, having a pH of 9 to 14 at 25°C.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] In the sterilization and cleaning of instruments and equipment, and the cleaning and disinfection of floors and walls in facilities requiring hygiene management such as hospitals or nursing homes, a disinfectant-containing cleaning solution is sprayed or applied and then dried or wiped off with a cloth, or the surface is wiped with a cleaning sheet made of nonwoven or woven fabric impregnated with the cleaning solution. Infection control guidelines, particularly in hospitals, state that environmental surfaces that come into contact with hands on a daily basis should be cleaned at least once a day. However, since many of the hard surfaces in question are metal surfaces such as aluminum, if an alkaline cleaning solution is used for sterilization and cleaning purposes, frequent wiping can lead to corrosion problems such as oxidation.

[0003] Patent Document 1 describes a paper containing 80% by mass or more of cellulose-based fibers and having a basis weight of 20 to 120 g / m 2 The document discloses a disinfecting cleaning article comprising a substrate sheet impregnated with a liquid detergent composition, the liquid detergent composition containing 0.01 to 0.50 mass % of an organic acid, 0.1 to 1.0 mass % of a surfactant, and 0.5 to 5.0 mass % of a divalent or higher metal ion compound. Patent Document 2 describes a hard cleaning sheet for disinfecting and wiping, which is obtained by impregnating a nonwoven or woven fabric sheet with a liquid agent containing 3 to 20 mass % of a glycol derivative and 0.1 to 5.0 mass % of a cationic antibacterial agent. Patent Document 3 describes a germicidal cleaning agent composition containing an oxidizing germicide, an inorganic alkaline agent, a surfactant, and water and having a pH of 10 or more and 14 or less, and a wiping material containing the same in a nonwoven fabric. Patent Document 4 describes a disinfecting sheet containing a quaternary ammonium salt surfactant, an inorganic electrolyte and / or citrate, an alkaline agent, and water. Patent Document 5 describes a liquid detergent composition for hard surfaces containing a cationic surfactant, an inorganic salt of zinc or copper, a nonionic surfactant, and water, and a hard surface cleaning sheet in which a nonwoven fabric or the like is impregnated with the composition. Patent Document 6 describes a disinfecting sheet in which an aqueous disinfectant containing a cationic surfactant, an alkanolamine, an inorganic alkaline agent such as a carbonate or silicate, and water is held in a base sheet. Patent Document 7 discloses a cleaning composition for reducing corrosion of hard surfaces including aluminum and / or anodized aluminum metal surfaces, which contains (a) an aminocarboxylic acid chelating agent, (b) one or more acids selected from lactic acid, malic acid, tartaric acid, citric acid, and salts thereof, and water. Patent Document 8 discloses an additive for alkaline detergents, which is characterized in that the additive contains a dibasic acid, an alkanolamine, and a silicate, and the dibasic acid is an unsaturated dibasic acid that has at least a branched chain and an unsaturated bond on a carbon atom branched from the main chain, and also discloses an alkaline detergent composition containing the additive. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2017-110323 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-138519 [Patent Document 3] Japanese Patent Publication No. 2020-44217 [Patent Document 4] Japanese Patent Application Laid-Open No. 2018-27916 [Patent Document 5] Japanese Patent Publication No. 2022-175552 [Patent Document 6] Japanese Patent Application Laid-Open No. 2017-7998 [Patent Document 7] Japanese Patent Application Publication No. 2023-100511 [Patent Document 8] Japanese Patent Application Laid-Open No. 2008-297469 Summary of the Invention [Problem to be solved by the invention]

[0005] When wiping hard surfaces, including metal surfaces such as aluminum, with an alkaline liquid detergent composition, a method of adding silicate to the alkaline liquid detergent composition has been used to suppress corrosion of the metal surface. However, it has been found that this method leaves white residue on the hard surface, which is undesirable from an aesthetic point of view and poses a problem.

[0006] The present invention provides a liquid detergent composition for hard surfaces and a wiping and cleaning sheet for hard surfaces that inhibit discoloration due to corrosion of metal on a hard surface and inhibit white residue on the hard surface when the alkaline liquid detergent composition is brought into contact with a hard surface, including a metal surface such as aluminum, and the hard surface is wiped off with a nonwoven or woven fabric, or when the hard surface is wiped off with a wiping and cleaning sheet comprising the liquid detergent composition and a nonwoven or woven fabric. [Means for solving the problem]

[0007] The present invention relates to a liquid detergent composition for hard surfaces, which contains (a) an α-hydroxycarboxylic acid and / or a salt thereof having a molecular weight of 210 or less and having one to two carboxyl groups (hereinafter referred to as component (a)), (b) a silicate (hereinafter referred to as component (b)), (c) an alkaline agent other than component (b) (hereinafter referred to as component (c)), and water, and which has a pH of 9 to 14 at 25°C.

[0008] The present invention also relates to a wiping sheet for hard surfaces, which comprises the liquid detergent composition for hard surfaces of the present invention and a nonwoven fabric or a woven fabric. [Effects of the Invention]

[0009] According to the present invention, there are provided a liquid detergent composition for hard surfaces and a wiping and cleaning sheet for hard surfaces, which inhibit discoloration due to corrosion of metal on a hard surface and inhibit white residue on the hard surface when the alkaline liquid detergent composition is brought into contact with a hard surface, including a metal surface such as aluminum, and the hard surface is wiped off with a nonwoven or woven fabric, or when the hard surface is wiped off with a wiping and cleaning sheet comprising the liquid detergent composition and a nonwoven or woven fabric. DETAILED DESCRIPTION OF THE INVENTION

[0010] The reason why the liquid detergent composition for hard surfaces and the wiping and cleaning sheet for hard surfaces of the present invention inhibit discoloration due to corrosion of metals on hard surfaces, including metal surfaces such as aluminum, and inhibit white residue on hard surfaces is not entirely clear, but is presumed to be as follows. When the liquid detergent composition for hard surfaces and the wiping sheet for hard surfaces of the present invention are brought into contact with a metal surface such as aluminum, the specific α-hydroxycarboxylic acid and / or its salt, which is component (a) of the present invention, forms a complex on the surface of the metal such as aluminum, and at the same time, the silicate, which is component (b), deposits on the surface of the metal such as aluminum. These form a strong protective film, which can prevent corrosion of the metal by chemicals such as hydroxide ions derived from component (c), and it is also possible to reduce the amount of component (b), which is presumably why white residue is suppressed. However, the present invention is not limited to the above-mentioned mechanism of action.

[0011] [Liquid cleaning composition for hard surfaces] <Component (a)> Component (a) is an α-hydroxycarboxylic acid and / or a salt thereof having one to two carboxyl groups and a molecular weight of 210 or less. Component (a) is preferably a compound in which the molecular weight of the hydroxycarboxylic acid portion, excluding the salt portion, is 210 or less in acid form. Alpha-hydroxycarboxylic acids consist of mono- or polycarboxylic acids bearing one or more hydroxyl functional groups, at least one of which is introduced in the alpha position of the acid (the carbon adjacent to the carboxyl functional group). Examples of α-hydroxycarboxylic acids (number of carboxyl groups, molecular weight) having a molecular weight of 210 or less and having one to two carboxyl groups include one or more selected from the group consisting of lactic acid (1, 90.08), malic acid (2, 134.09), methyllactic acid (1, 104.11), phenyllactic acid (1, 166.18), mandelic acid (1, 152.14), glycolic acid (1, 76.05), tartronic acid (2, 120.06), tartaric acid (2, 150.09), gluconic acid (2, 196.16), and salts thereof. The salt of the α-hydroxycarboxylic acid of component (a) may be an inorganic salt or an organic salt. From the viewpoint of improving metal corrosion inhibition and white residue inhibition, component (a) is more preferably one or more selected from lactic acid, malic acid, tartaric acid, and salts thereof, and even more preferably one or more selected from malic acid, tartaric acid, and salts thereof. In the present invention, when the counter ion of component (a) is an alkanolamine, the alkanolamine as the counter ion of component (a) is classified as component (c) when the pH of the hard surface cleaner composition of the present invention is within the range of the present invention.

[0012] <(b) Component> Component (b) is a silicate. The silicate is, for example, one or more selected from sodium silicate and potassium silicate, more specifically, one or more selected from sodium metasilicate, sodium orthosilicate, No. 1 sodium silicate, No. 2 sodium silicate, No. 3 sodium silicate, No. 4 sodium silicate, 1K potassium silicate, and 2K potassium silicate.

[0013] <(c) component> Component (c) is an alkaline agent other than component (b). The alkaline agent other than the component (b) is, for example, one or more selected from inorganic alkaline agents (excluding the component (b)) and organic alkaline agents. The inorganic alkaline agent is, for example, one or more selected from alkali metal hydroxides and alkali metal carbonates. The alkali metal hydroxide is, for example, one or more of lithium hydroxide, sodium hydroxide, and potassium hydroxide, and one or more selected from sodium hydroxide and potassium hydroxide is preferred. The alkali metal carbonate is, for example, one or more selected from sodium carbonate, potassium carbonate, lithium carbonate, sodium hydrogen carbonate, and potassium hydrogen carbonate. The organic alkaline agent is, for example, an alkanolamine. The alkanolamine is, for example, one or more selected from monoethanolamine, diethanolamine, triethanolamine, aminomethylpropanol, N-methylmonoethanolamine, N-methyldiethanolamine, and N,N-dimethylmonoethanolamine, and monoethanolamine is more preferred.

[0014] From the viewpoint of improving metal corrosion inhibition, component (c) is preferably at least one selected from alkanolamines, alkali metal carbonates, and alkali metal hydroxides, more preferably at least one selected from alkanolamines and alkali metal carbonates, and even more preferably alkanolamines. In the liquid detergent composition for hard surfaces of the present invention, the contained acid is consumed as an alkali metal salt, and the content of the alkali metal hydroxide, which is component (c), in the liquid detergent composition for hard surfaces of the present invention is determined from the concentration of the remaining free alkali metal ions.

[0015] <Composition, etc.> From the viewpoint of improving metal corrosion inhibition, the liquid detergent composition for hard surfaces of the present invention contains component (a) in an amount of preferably 0.01% by mass or more, more preferably 0.04% by mass or more, even more preferably 0.08% by mass or more, and preferably 2% by mass or less, more preferably 1% by mass or less, even more preferably 0.8% by mass or less in the detergent composition. In the present invention, the mass of component (a) is expressed as a value converted into the acid form.

[0016] The liquid detergent composition for hard surfaces of the present invention contains component (b) in an amount of preferably 0.001% by mass or more, more preferably 0.006% by mass or more, even more preferably 0.008% by mass or more, and still more preferably 0.01% by mass or more, in terms of improving metal corrosion inhibition, and preferably 0.2% by mass or less, more preferably 0.1% by mass or less, even more preferably 0.08% by mass or less, and still more preferably 0.06% by mass or less, in terms of improving white residue inhibition and making wiping streaks less noticeable. In the present invention, the mass of component (b) is expressed as a value converted into an anhydrous sodium salt.

[0017] From the viewpoint of improving metal corrosion inhibition, the component (c) contained in the liquid detergent composition for hard surfaces of the present invention is preferably one or more selected from alkanolamines, alkali metal carbonates, and alkali metal hydroxides, more preferably one or more selected from alkanolamines and alkali metal carbonates, and even more preferably alkanolamines. The liquid detergent composition for hard surfaces of the present invention contains component (c) in an amount of preferably 0.05% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.1% by mass or more, and still more preferably 0.2% by mass or more, from the viewpoint of improving metal corrosion inhibition, and preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 2% by mass or less, and still more preferably 1.5% by mass or less, from the viewpoint of improving white residue inhibition. Furthermore, when the liquid detergent composition for hard surfaces of the present invention contains an alkanolamine (hereinafter also referred to as component (c1)) as component (c), the detergent composition contains preferably 0.05% by mass or more of component (c1) in order to improve metal corrosion inhibition, more preferably 0.08% by mass or more, even more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, and from the viewpoint of improving white residue inhibition, the detergent composition contains preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 2% by mass or less, still more preferably 1.5% by mass or less. Furthermore, when the liquid detergent composition for hard surfaces of the present invention contains an alkali metal carbonate as component (c) (hereinafter also referred to as component (c2)), the detergent composition contains preferably 0.05% by mass or more of component (c2) in order to improve metal corrosion inhibition, more preferably 0.08% by mass or more, even more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, and from the viewpoint of improving white residue inhibition, the detergent composition contains preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 2% by mass or less, still more preferably 1% by mass or less. The alkanolamine and the alkali metal carbonate may be used alone or in combination, but it is preferable to contain the alkanolamine, particularly monoethanolamine, in the above-mentioned concentration range. In the liquid detergent composition for hard surfaces of the present invention, the total content of component (c1) and component (c2) is preferably 0.05% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.1% by mass or more, and even more preferably 0.2% by mass or more, from the viewpoint of improving metal corrosion inhibition, and is preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 2% by mass or less, and even more preferably 1.5% by mass or less, from the viewpoint of improving white residue inhibition.

[0018] In the liquid detergent composition for hard surfaces of the present invention, the mass ratio (a) / [(c1)+(c2)] of the content of component (a) to the total content of alkanolamine (component (c1)) and alkali metal carbonate (component (c2)) of component (c) is preferably 0.001 or more, more preferably 0.01 or more, even more preferably 0.1 or more, and still more preferably 0.2 or more, from the viewpoint of improving metal corrosion inhibition, and from the viewpoint of improving white residue inhibition by obtaining the metal corrosion inhibitory effect with a small amount of component (b), it is preferably 50 or less, more preferably 10 or less, even more preferably 5 or less, and still more preferably 1 or less.

[0019] In the liquid detergent composition for hard surfaces of the present invention, the mass ratio (b) / (a) of the content of component (b) to the content of component (a) is preferably 0.001 or more, more preferably 0.01 or more, even more preferably 0.05 or more, and still more preferably 0.06 or more, from the viewpoint of improving the inhibition of metal corrosion, and is preferably 20 or less, more preferably 5 or less, even more preferably 1 or less, still more preferably 0.5 or less, still more preferably 0.4 or less, still more preferably 0.3 or less, and still more preferably 0.2 or less, from the viewpoint of improving the inhibition of white residue and metal corrosion.

[0020] From the viewpoint of inhibiting metal corrosion and improving cleaning properties, the liquid detergent composition for hard surfaces of the present invention preferably further contains a surfactant as component (d). The component (d) is at least one selected from anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactants.

[0021] The anionic surfactant is, for example, one or more selected from aromatic sulfonates having a hydrocarbon group with from 8 to 18 carbon atoms, alkyl or alkenyl sulfate ester salts having an alkyl or alkenyl group with from 8 to 18 carbon atoms, polyoxyalkylene alkyl or alkenyl ether sulfate ester salts having an alkyl or alkenyl group with from 8 to 18 carbon atoms, and fatty acid salts having from 8 to 18 carbon atoms. The aromatic sulfonate has a hydrocarbon group, preferably an alkyl group, having 8 or more carbon atoms, preferably 10 or more carbon atoms, and 18 or less carbon atoms, preferably 14 or less carbon atoms. Specifically, the aromatic sulfonate is one or more selected from alkylbenzene sulfonates and alkyldiphenyl ether sulfonates. The alkyl or alkenyl sulfate salt has an alkyl or alkenyl group having 8 or more, preferably 10 or more, carbon atoms and 18 or less, preferably 14 or less. The polyoxyalkylene alkyl or alkenyl ether sulfate salts have alkyl or alkenyl groups having 8 or more carbon atoms, preferably 10 or more, and 18 or less, preferably 14 or less. The polyoxyalkylene alkyl or alkenyl ether sulfate salts have an oxyalkylene group having preferably 2 or 3 carbon atoms, more preferably 2, and an average number of moles of oxyalkylene groups added of 0.5 or more, more preferably 1.0 or more, and 4.0 or less, preferably 3.0 or less. The fatty acid salt has 8 or more, preferably 10 or more, and 18 or less, preferably 14 or less, carbon atoms. The salts of these anionic surfactants are, for example, alkali metal salts such as sodium salts or potassium salts, or ammonium salts.

[0022] The nonionic surfactant is, for example, one or more nonionic surfactants selected from amine oxide surfactants, glycoside nonionic surfactants, polyoxyalkylene monoalkyl or alkenyl ether nonionic surfactants, polyhydric alcohol fatty acid ester or polyhydric alcohol alkyl ether nonionic surfactants, and alkanolamide nonionic surfactants. From the viewpoints of improving white residue suppression and making wiping streaks less noticeable, one or more surfactants selected from amine oxide surfactants and glycoside nonionic surfactants are preferred. The polyhydric alcohol fatty acid ester or polyhydric alcohol alkyl ether nonionic surfactants may also contain a glycoside nonionic surfactant.

[0023] Examples of amine oxide surfactants include polyoxyalkylene alkyl or alkenyl ethers having alkyl or alkenyl groups with 8 to 18 carbon atoms and an average molar addition number of oxyalkylene groups of 5 to 20, and amine oxides having at least one alkyl or alkenyl group with 8 to 18 carbon atoms, preferably 14 to 12 carbon atoms, and the remainder preferably having 1 to 3 carbon atoms, preferably methyl groups. The alkyl group may be a compound bonded to the amine via an amidopropyl group. Specifically, the surfactant is an alkyldimethylamine oxide or alkylamidopropyldimethylamine oxide having an alkyl group with 8 to 18 carbon atoms, preferably 14 to 12 carbon atoms, preferably a linear alkyl group.

[0024] The glycoside nonionic surfactant is, for example, a glycoside nonionic surfactant having a hydrocarbon group, preferably an alkyl or alkenyl group, more preferably an alkyl group, with a carbon number of 8 or more, preferably 10 or more and 18 or less, preferably 14 or less, from the viewpoints of improving antibacterial properties and making wiping streaks less noticeable, and an average degree of monosaccharide condensation of preferably 1 or more, preferably 3 or less, more preferably 2 or less, and even more preferably 1.5 or less.

[0025] The glycoside-type nonionic surfactant is preferably a compound represented by the following general formula (1d). R 1d (OR 2d ) x G y (1d) [In the formula, R 1d represents a hydrocarbon group having 8 to 20 carbon atoms, and R 2d represents an alkylene group having 2 to 4 carbon atoms, G represents a residue derived from a monosaccharide having 5 or 6 carbon atoms, x represents a number whose average value is 0 to 5, and y represents a number whose average value is 1 to 3. 1d OR 2d The bond between G and the group (I) is preferably an ether bond or an ester bond.

[0026] In the above general formula (1d), R 1d From the viewpoint of improving the suppression of white residue and making wiping streaks less noticeable, R is a hydrocarbon group having 8 or more, preferably 10 or more, and 18 or less, preferably 14 or less carbon atoms, preferably an alkyl or alkenyl group, more preferably an alkyl group. 2d The alkylene group represented by is preferably one having two carbon atoms. The structure of the residue derived from a sugar having five or six carbon atoms represented by G is determined depending on the monosaccharide or disaccharide or higher sugar used. For example, G is a residue derived from one or more monosaccharides selected from glucose, galactose, xylose, mannose, lyxose, arabinose, and fructose, and for disaccharides or higher sugars, it is a residue derived from one or more disaccharides or higher sugars selected from maltose, xylobiose, isomaltose, cellobiose, gentiobiose, lactose, sucrose, nigerose, turanose, raffinose, gentianose, and menzitose. Among these, preferred raw materials are one or more monosaccharides selected from glucose and fructose, and one or more disaccharides or higher sugars selected from maltose and sucrose, in terms of detergency, availability, and low cost.

[0027] In addition, x in the general formula (1d) is OR 2d is the average number of moles added, and is preferably 0 or more, and preferably 5 or less, more preferably 3 or less, further preferably 1 or less, and may also be 0.

[0028] Furthermore, when the average value of y in the above general formula (1d) is greater than 1, that is, when the glycoside-type nonionic surfactant has a sugar chain of disaccharide or more as the hydrophilic group, the sugar chain bond type can include 1-2, 1-3, 1-4, 1-6 bond, α-, β-pyranoside bond, furanoside bond, or any mixture of these bond types.

[0029] The average value of y in the general formula (1d) is 1 or more and 3 or less, preferably 2 or less, and more preferably 1.5 or less. The value of y (average degree of condensation of sugars) is 1The measurement is performed by H-NMR. For a specific measurement method, reference can be made to the method described in JP-A-8-53696, page 6, column 10, line 26 to page 7, column 11, line 15.

[0030] The polyoxyalkylene monoalkyl or alkenyl ether type nonionic surfactant is, for example, a nonionic surfactant represented by the following general formula (2d). R 3d O-(AO) n -H (2d) [In the formula, R 3d is an alkyl or alkenyl group having 8 to 20 carbon atoms, AO is an alkyleneoxy group having 1 to 3 carbon atoms, and n is the average number of moles of AO added, which is a number of 1 to 20.

[0031] In general formula (2d), R 3d From the viewpoints of improving the suppression of white residue and making wiping streaks less noticeable, the number of carbon atoms in R is 8 or more, preferably 10 or more, more preferably 12 or more, and 20 or less, preferably 18 or less, more preferably 16 or less. 3d is an alkyl group or an alkenyl group, preferably an alkyl group derived from a higher alcohol, more preferably a linear or branched alkyl group, and even more preferably an alkyl group derived from a linear primary alcohol or a linear secondary alcohol, from the viewpoints of improving the suppression of white residue and making wiping streaks less noticeable. In general formula (2d), AO is preferably an alkyleneoxy group having 2 or more and 3 or less carbon atoms, and more preferably an alkyleneoxy group having 2 carbon atoms, that is, an ethyleneoxy group. In general formula (2d), n is a number of 1 or more, preferably 3 or more, more preferably 5 or more, and 20 or less, preferably 15 or less, more preferably 10 or less, from the viewpoint of improving the suppression of white residue and making wiping streaks less noticeable.

[0032] The polyhydric alcohol fatty acid ester or polyhydric alcohol alkyl ether nonionic surfactant is preferably an ester or ether compound of a fatty acid or aliphatic alcohol having 8 or more carbon atoms, preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, and 20 or less, preferably 18 or less, and a polyhydric alcohol having 3 to 10 hydroxy groups in the molecule. Examples of polyhydric alcohols include monosaccharides or oligosaccharides such as glycerin, polyglycerin, pentaerythritol, trimethylolpropane, sorbitan, and sucrose, as well as alkylene oxide adducts thereof. The polyhydric alcohol fatty acid ester or polyhydric alcohol alkyl ether nonionic surfactant is preferably one or more selected from sorbitan fatty acid esters and polyoxyethylene sorbitan fatty acid esters. When the polyhydric alcohol fatty acid ester type or polyhydric alcohol alkyl ether type nonionic surfactant contains an alkyleneoxy group, preferably an ethyleneoxy group, the average number of moles added is preferably 3 or more, more preferably 5 or more, even more preferably 10 or more, and still more preferably 15 or more, and 30 or less, preferably 25 or less. In the case of a polyhydric alcohol fatty acid ester, the alkyleneoxy group, preferably the ethyleneoxy group, is preferably added between the alkanoyloxy group or alkenoyloxy group constituting the fatty acid ester and the polyhydric alcohol compound, and in the case of a polyhydric alcohol alkyl ether, it is preferably added between the alkyl ether group and the polyhydric alcohol compound.

[0033] From the viewpoints of improving the suppression of white residue and making wiping streaks less noticeable, the number of carbon atoms in the fatty acid moiety constituting the sorbitan fatty acid ester is 8 or more, preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, and 20 or less, preferably 18 or less. The fatty acid is a saturated fatty acid or an unsaturated fatty acid, and an unsaturated fatty acid is preferred. From the viewpoints of improving the suppression of white residue and making wiping streaks less noticeable, the average degree of esterification of the sorbitan fatty acid ester is preferably 0.8 or more, more preferably 1 or more, and preferably 3 or less, more preferably 1.5 or less, and even more preferably 1, i.e., a monoester. Examples of sorbitan fatty acid esters include sorbitan monocaprylate, sorbitan monolaurate, sorbitan monooleate, etc. The sorbitan fatty acid ester preferably has a monoester structure as the main structure, but may also contain a diester or triester structure.

[0034] From the viewpoints of improving the suppression of white residue and making wiping streaks less noticeable, the number of carbon atoms in the fatty acid moiety constituting the polyoxyethylene sorbitan fatty acid ester is 8 or more, preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, and 20 or less, preferably 18 or less. The fatty acid is a saturated fatty acid or an unsaturated fatty acid, and an unsaturated fatty acid is preferred. From the viewpoints of improving the suppression of white residue and making wiping streaks less noticeable, the average degree of esterification of the polyoxyethylene sorbitan fatty acid ester is preferably 0.8 or more, more preferably 1 or more, and preferably 3 or less, more preferably 1.5 or less, and even more preferably 1, i.e., a monoester. The average number of moles of oxyethylene groups added in the polyoxyethylene sorbitan fatty acid ester is preferably 3 or more, more preferably 5 or more, even more preferably 10 or more, and still more preferably 15 or more, and is preferably 30 or less, more preferably 25 or less, from the viewpoints of improving the suppression of white residue and making wiping streaks less noticeable. Examples of polyoxyethylene sorbitan fatty acid esters include polyoxyethylene (20) sorbitan monolaurate (saturated fatty acid having 12 carbon atoms, average number of moles of ethylene oxide (hereinafter sometimes referred to as EO) added = 20), polyoxyethylene (20) sorbitan monostearate (saturated fatty acid having 18 carbon atoms, average number of moles of EO added = 20), polyoxyethylene (6) sorbitan monooleate (monounsaturated fatty acid having 18 carbon atoms, average number of moles of EO added = 6), and polyoxyethylene (20) sorbitan monooleate (monounsaturated fatty acid having 18 carbon atoms, average number of moles of EO added = 20).

[0035] The alkanolamide nonionic surfactant is, for example, one or more selected from fatty acid monoethanolamides and fatty acid diethanolamides. The number of carbon atoms in the fatty acid moiety (acyl group) of the fatty acid alkanolamide is preferably 8 or more, more preferably 12 or more, and preferably 18 or less, more preferably 16 or less.

[0036] The amphoteric surfactant is, for example, one or more selected from sulfobetaine surfactants and carbobetaine surfactants, and sulfobetaine surfactants having a hydrocarbon group, preferably an alkyl group, with 8 or more, preferably 10 or more, carbon atoms and 18 or less, preferably 14 or less, carbon atoms are preferred. The amphoteric surfactant is, for example, one or more selected from N-alkyl-N,N-dimethylacetic acid betaine, N-alkylamidopropyl-N,N-dimethylacetic acid betaine, N-alkyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine, N-alkyl-N,N-dimethyl-N-sulfopropylammonium betaine, N-alkylamidopropyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine, and N-alkylamidopropyl-N,N-dimethyl-N-sulfopropylammonium sulfobetaine, with N-alkyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine being preferred (the alkyl groups in these compounds have 8 or more carbon atoms, preferably 10 or more carbon atoms, and 18 or less, preferably 14 or less carbon atoms).

[0037] The cationic surfactant is, for example, a quaternary ammonium salt cationic surfactant. The quaternary ammonium salt cationic surfactant is a quaternary ammonium salt cationic surfactant in which, among the groups bonded to the nitrogen atom, one or two are hydrocarbon groups having from 8 to 20 carbon atoms, preferably from 10 to 18 carbon atoms, and more preferably from 10 to 14 carbon atoms, preferably an alkyl group or an alkenyl group, and the remaining groups are groups selected from the group consisting of alkyl groups having from 1 to 3 carbon atoms, hydroxyalkyl groups having from 1 to 3 carbon atoms, and arylalkyl groups (such as benzyl groups), preferably groups selected from the group consisting of methyl groups, ethyl groups, and benzyl groups. Among these, quaternary ammonium salt cationic surfactants having antibacterial, bactericidal, virus inactivating, and anticorrosive effects are preferred, and quaternary ammonium salt cationic surfactants having a benzyl group are preferred from the viewpoint of improving antibacterial, bactericidal, and virus inactivating properties.

[0038] From the viewpoints of improving antibacterial, bactericidal and viral inactivating properties and making wiping streaks less noticeable, the cationic surfactant of component (d) is preferably one or more quaternary ammonium salts selected from the group consisting of quaternary ammonium salts represented by the following general formula (11d) and quaternary ammonium salts represented by the following general formula (12d):

[0039] [ka]

[0040] [In the formula, R 11d is a hydrocarbon group having 8 to 20 carbon atoms, and R 12d and R 13d are each independently a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms, and X - is an anion.

[0041] [ka]

[0042] [In the formula, R 14d is a hydrocarbon group having 8 to 20 carbon atoms, and R 15d is a group selected from a hydrocarbon group having 8 to 20 carbon atoms, an alkyl group having 1 to 3 carbon atoms, and a hydroxyalkyl group having 1 to 3 carbon atoms, and R 16d and R 17d are each independently a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms, and X - is an anion.

[0043] In general formula (11d), R 11d is a hydrocarbon group, preferably an alkyl or alkenyl group, more preferably an alkyl group, having a carbon number of preferably 10 or more and preferably 18 or less, more preferably 16 or less, and even more preferably 14 or less, from the viewpoints of improving antibacterial, bactericidal and viral inactivating properties and making wiping streaks less noticeable. In addition, in the general formula (11d), R 12d , R 13d are each independently a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms, preferably an alkyl group having 1 to 3 carbon atoms, more preferably an alkyl group having 1 to 2 carbon atoms, and even more preferably a methyl group. In addition, X in general formula (11d) - is preferably a halogen ion such as a chloride ion, more preferably a chloride ion (Cl - )

[0044] In general formula (12d), R 14d is a hydrocarbon group, preferably an alkyl or alkenyl group, more preferably an alkyl group, having a carbon number of preferably 8 or more, more preferably 10 or more, and preferably 18 or less, more preferably 16 or less, and even more preferably 14 or less, from the viewpoints of improving antibacterial properties, bactericidal properties, and virus inactivating properties, and making wiping streaks less noticeable. In addition, in the general formula (12d), R 15dis a hydrocarbon group having 8 to 20 carbon atoms, R 15d is a hydrocarbon group, preferably an alkyl or alkenyl group, more preferably an alkyl group, having a carbon number of preferably 10 or more and preferably 18 or less, more preferably 16 or less, and even more preferably 14 or less, from the viewpoints of improving antibacterial, bactericidal and viral inactivating properties and making wiping streaks less noticeable. In addition, in the general formula (12d), R 15d is an alkyl group having 1 to 3 carbon atoms, R 15d is preferably an alkyl group having 1 to 3 carbon atoms, more preferably an alkyl group having 1 to 2 carbon atoms, and even more preferably a methyl group. In addition, in the general formula (12d), R 16d , R 17d are each independently a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms, preferably an alkyl group having 1 to 3 carbon atoms, more preferably an alkyl group having 1 to 2 carbon atoms, and even more preferably a methyl group. In addition, X in general formula (12d) - is preferably a halogen ion such as a chloride ion, more preferably a chloride ion (Cl - )

[0045] From the viewpoints of improving cleaning performance and reducing the visibility of wiping streaks, component (d) preferably contains a nonionic surfactant, more preferably one or more selected from amine oxide surfactants having at least one alkyl or alkenyl group having from 8 to 18 carbon atoms, glycoside nonionic surfactants having a hydrocarbon group having from 8 to 18 carbon atoms and an average sugar condensation degree of from 1 to 3, and polyoxyalkylene alkyl or alkenyl ethers having an alkyl or alkenyl group having from 8 to 18 carbon atoms, an average of from 3 to 30 oxyethylene groups as oxyalkylene groups, and either no oxypropylene groups or an average of 5 moles or less. Furthermore, component (d) preferably contains a cationic surfactant from the viewpoints of improving metal corrosion inhibition, antibacterial properties, bactericidal properties, and virus inactivation properties. Component (d) can contain a nonionic surfactant and a cationic surfactant, but if an anionic surfactant is also contained, a complex will be formed, increasing the oiliness. In this case, care must be taken to ensure the stability of the appearance of the liquid hard surface cleaner composition, as this may result in phase separation.

[0046] When the liquid detergent composition for hard surfaces of the present invention contains component (d), the detergent composition contains component (d) in an amount of preferably 0.05% by mass or more, more preferably 0.08% by mass or more, even more preferably 0.1% by mass or more, and still more preferably 0.2% by mass or more, from the viewpoint of inhibiting metal corrosion and improving cleaning properties, and preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 2% by mass or less, and still more preferably 1% by mass or less, from the viewpoint of improving suppression of white residue. If the anionic surfactant (d) is contained, the mass of the anionic surfactant shall be converted to the sodium salt. If the cationic surfactant (d) is contained, the mass of the cationic surfactant shall be converted to the chloride salt.

[0047] The liquid detergent composition for hard surfaces of the present invention may contain bases other than components (a), (b), (c), optional component (d), and water. Such additives include compounds used in known liquid detergent compositions for hard surfaces, specifically, sequestering agents (excluding those corresponding to component (a)), short-chain alcohols, glycol-based solvents, and aromatic alcohols.

[0048] The liquid detergent composition for hard surfaces of the present invention may contain a sequestering agent as component (e) (excluding those that fall under component (a)). Component (e) is, for example, one or more selected from citric acid, ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA), N-hydroxyethyl-ethylenediaminetriacetic acid (HEDTA), iminodiacetic acid, methylglycine diacetic acid (MGDA), glycine-N,N-diacetic acid derivatives, polyphosphoric acid, etidronic acid (HEDP), phosphonobutanetricarboxylic acid (PBTC), and alkali metal salts thereof. When the liquid detergent composition for hard surfaces of the present invention contains component (e), the content of component (e) in the detergent composition, calculated as the acid form, is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, and preferably 5% by mass or less, more preferably 1% by mass or less, even more preferably 0.5% by mass or less.

[0049] When the liquid detergent composition for hard surfaces of the present invention is used as a wiping sheet for hard surfaces described below, it preferably contains, as component (f), one or more selected from monohydric or dihydric alcohols and glycol solvents, from the viewpoint of easy volatilization and excellent cleaning properties. Component (f) can be one or more selected from methanol, ethanol, propanol, ethylene glycol, propylene glycol, diethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, and propylene glycol monoethyl ether, with one or more selected from ethylene glycol monomethyl ether and propylene glycol monomethyl ether being preferred.

[0050] When the liquid detergent composition for hard surfaces of the present invention contains component (f), the content of component (f) in the detergent composition is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.5% by mass or more, still more preferably 1% by mass or more, and preferably 20% by mass or less, more preferably 10% by mass or less, even more preferably 5% by mass or less.

[0051] The liquid detergent composition for hard surfaces of the present invention may contain (g) an aromatic alcohol for the purpose of virus inactivation. By using it in combination with (d) a cationic surfactant, the virus inactivation ability is further improved, and it also has excellent effect on inactivating non-enveloped viruses.

[0052] In addition to having virus inactivating properties, component (g) of the present invention has a CLogP of preferably 0.5 or more, more preferably 1 or more, and preferably 2.5 or less, more preferably 2 or less, even more preferably 1.5 or less, and even more preferably 1.4 or less, from the viewpoint of not leaving streaks when wiped off with a cloth or when impregnated into a woven fabric or nonwoven fabric sheet. Furthermore, it is an aromatic alcohol having a molecular weight of preferably 50 or more, more preferably 80 or more, and preferably 300 or less, more preferably 200 or less, and even more preferably 170 or less. For example, consider the following aromatic alcohols (the numbers in parentheses are ClogP values): The component (g) of the present invention is, for example, one or more selected from benzyl alcohol, 2-phenoxyethanol, 2-methylbenzyl alcohol (1.553), 3-methylbenzyl alcohol (1.603), 4-methylbenzyl alcohol (1.603), 1-phenyl-1-propanol (1.942), 1-(p-tolyl)ethanol (1.912), 1-hydroxyindane (1.518), 3-phenyl-1-propanol (1.712), cinnamyl alcohol (1.608), 2-phenylethanol (1.333), 2-hydroxyindane (1.218), and 1,2-dihydroxyindane (0.356), and from the viewpoint of blendability (ease of solubility in water), preferably one or more selected from benzyl alcohol (1.104) and 2-phenoxyethanol (1.188).

[0053] CLogP is an estimated value of the affinity of an organic compound for water and 1-octanol [P = (concentration of the organic compound in the 1-octanol phase) / (concentration of the organic compound in the aqueous phase)], and can be calculated using a calculation program that uses fragment values ​​of atomic groups determined by the number of atoms constituting the compound molecule and the type of chemical bond. In the present invention, CLogP calculated using ChemDraw ver. 22.2 from Perkin Elmer is used.

[0054] The liquid detergent composition for hard surfaces of the present invention preferably contains component (g) to an extent that does not impair the effect of leaving white residue. When component (g) is contained, the detergent composition contains component (g) 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 even more preferably 3% by mass or more. From the viewpoint of the base odor of the composition, the detergent composition contains component (g) in an amount of preferably 8% by mass or less, more preferably 5% by mass or less.

[0055] The liquid detergent composition for hard surfaces of the present invention may contain, in addition to the above-mentioned components, enzymes (protease, fat-splitting enzyme, carbohydrate-splitting enzyme, etc.), hydrotropes other than the above-mentioned solvents such as sodium paratoluenesulfonate, dispersants such as polyacrylates, viscosity modifiers such as xanthan gum, colorants, antioxidants such as BHA, antibacterial and antifungal agents commercially available under the trade name Proxel BDN (trademark), known foam inhibitors such as silicones, bleaching agents such as hypochlorite and hydrogen peroxide, bleach activators, pH adjusters such as inorganic acids, ultraviolet absorbers, colorants, known fragrances, etc. (however, components corresponding to components (a), (b), (c), (d), (e), (f), and (g) are excluded) within the scope of the object of the present invention.

[0056] The liquid detergent composition for hard surfaces of the present invention contains water. The water is not particularly limited, but examples thereof include tap water, well water, deionized water, distilled water, etc., and deionized water is preferred. Water is preferably used in an amount that makes up the remainder of the composition (amount that makes the total 100% by mass). The liquid detergent composition for hard surfaces of the present invention contains water in an amount of preferably 85% by mass or more, more preferably 90% by mass or more, and preferably 99.9% by mass or less, more preferably 99.3% by mass or less, of the liquid detergent composition. Water may be the remainder of the composition.

[0057] The liquid detergent composition for hard surfaces of the present invention has a pH at 25°C of 9 or more, preferably 9.5 or more, more preferably 10 or more, and even more preferably 10.5 or more, from the viewpoint of improving detergency, and a pH of 14 or less, preferably 13 or less, more preferably 12.5 or less, and even more preferably 12 or less, from the viewpoint of improving metal corrosion prevention and suppression of white residue. In particular, this pH is measured by the following method. (1) pH measurement method A pH measurement composite electrode (Horiba, Ltd., glass-ground sleeve type) with a saturated potassium chloride aqueous solution (3.33 mol / L) as the pH electrode internal solution is connected to a pH meter (Horiba, Ltd., pH / ion meter F-23). ​​Next, a pH 4.01 standard solution (phthalate standard solution), a pH 6.86 standard solution (neutral phosphate standard solution), and a pH 9.18 standard solution (borate standard solution) are each filled into 100 mL beakers and immersed in a thermostatic bath at 25°C for 30 minutes. The pH measurement electrode is immersed in the thermostatically adjusted standard solution for 3 minutes, and calibration is performed in the order of pH 6.86 → pH 9.18 → pH 4.01. The liquid detergent composition for hard surfaces to be measured is adjusted to 25°C, and the electrode of the pH meter is immersed in the sample, and the pH is measured after 1 minute.

[0058] From the viewpoint of ease of wiping, the viscosity of the liquid detergent composition for hard surfaces of the present invention at 25°C is preferably 1 mPa·s or more, more preferably 1.5 mPa·s or more, even more preferably 2 mPa·s or more, and preferably 10 mPa·s or less, more preferably 8 mPa·s or less, even more preferably 5 mPa·s or less. This viscosity is measured using a Brookfield viscometer. The viscosity is measured using a Brookfield viscometer, using one of the No. 1 to No. 3 rotors that matches the viscosity of the object being measured, at 60 r / min, and the reading is the reading one minute after the start of measurement. The liquid softener composition for hard surfaces is measured at a temperature of 25±1°C. If there are multiple rotors that meet the conditions, the value measured using the rotor with the smaller number is used.

[0059] The hard surfaces targeted by the liquid detergent composition for hard surfaces of the present invention include hard surfaces such as floors, walls, ceilings, and furniture in living areas such as living rooms, rooms, kitchens, bathrooms, and toilets. In particular, the liquid detergent composition for hard surfaces of the present invention exhibits antibacterial activity with just one wiping with the composition, and is therefore suitable for hard surfaces such as floors, walls, ceilings, furniture, tools, and equipment in facilities requiring strict hygiene management, such as hospitals or nursing homes. The hard surfaces targeted by the liquid detergent composition for hard surfaces of the present invention are made of plastics, ceramics, metals, wood, glass, rubber, carbon materials, etc. In particular, the liquid detergent composition for hard surfaces of the present invention does not discolor when brought into contact with aluminum, and is therefore preferred for hard surfaces including structures made of aluminum or aluminum-containing alloys.

[0060] [Hard surface cleaning methods, hard surface cleaning sheets] The present invention provides a method for cleaning a hard surface, which comprises contacting the hard surface with the liquid detergent composition for hard surfaces of the present invention. Hereinafter, the method for cleaning hard surfaces of the present invention will be described as the method of the present invention.

[0061] In the method of the present invention, the liquid detergent composition for hard surfaces is applied to an area of ​​1 m2 of the target hard surface. 2 From the viewpoint of improving the cleaning properties, the amount of the solution is preferably 0.4 g or more, more preferably 0.8 g or more, even more preferably 1 g or more, and preferably 10 g or less, more preferably 15 g or less, even more preferably 10 g or less, and is preferably applied or sprayed.

[0062] The method for contacting the liquid detergent composition for hard surfaces with the hard surface is preferably spraying or applying, and more preferably spraying in the form of droplets or applying in the form of foam. Specifically, a spray means is used. That is, it is preferable to use a cleaning article in which the liquid cleaning composition for hard surfaces of the present invention is filled in a container equipped with a sprayer. That is, the present invention provides a cleaning article in a spray container in which the liquid cleaning composition for hard surfaces of the present invention is filled in a container equipped with a sprayer.

[0063] In the spray-container-packaged cleaning article of the present invention, the container equipped with a sprayer filled with the liquid detergent composition for hard surfaces of the present invention 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, and more preferably a trigger-type spray equipped with a mechanism for spraying the contents in the form of droplets or a mechanism for forming foam (foam-forming mechanism).

[0064] After the liquid cleaning composition for hard surfaces has been brought into contact with the hard surface, the nonwoven fabric or woven fabric is pressed against the hard surface, and external force is applied by hand or the like within a range that does not damage the area to be cleaned, thereby transferring the dirt adhering to the area to be cleaned to the nonwoven fabric or woven fabric, which may be done by rubbing, kneading, or tapping.

[0065] In the method of the present invention, a hard surface may be wiped clean with a nonwoven or woven fabric impregnated with the liquid hard surface cleaning composition of the present invention. That is, the present invention provides a wiping sheet for hard surfaces, which comprises the liquid detergent composition for hard surfaces of the present invention and a nonwoven fabric or a woven fabric. In other words, the present invention provides a wiping and cleaning sheet for hard surfaces, which is obtained by impregnating a nonwoven fabric or a woven fabric with the liquid detergent composition for hard surfaces of the present invention. The present invention also provides a method for cleaning a hard surface, which comprises wiping the hard surface with the hard surface wiping and cleaning sheet of the present invention.

[0066] The nonwoven fabric or woven fabric is processed into a sheet, and the fibers constituting the nonwoven fabric or woven fabric are preferably composed of one or more types of fibers selected from hydrophilic fibers and hydrophobic fibers. In the present invention, hydrophilic fibers refer to fibers whose moisture regain under standard conditions (20°C, 65% RH) exceeds 5%. The moisture regain under standard conditions is measured by the method specified in JIS L1013 and JIS L1015. Hydrophobic fibers refer to fibers whose moisture regain under standard conditions (20°C, 65% RH) is 5% by mass or less.

[0067] Examples of hydrophobic chemical fibers include polyamide fibers (such as nylon), polyester fibers (such as polyester), polyacrylonitrile fibers (such as acrylic), polyvinyl alcohol fibers (such as vinylon), polyvinyl chloride fibers (such as polyvinyl chloride), polyvinylidene chloride fibers (such as vinylidene), polyolefin fibers (such as polyethylene and polypropylene), polyurethane fibers (such as polyurethane), and polyvinyl chloride / polyvinyl alcohol copolymer fibers (such as polycrelal), and these may be used alone or in combination.

[0068] Examples of hydrophilic fibers include seed fibers (cotton, cotton, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), leaf vein fibers (Manila hemp, sisal, etc.), palm fibers, rush, straw, animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuna, angora, etc.), silk fibers (domestic silk, wild silk), feathers, and cellulosic fibers (rayon, polynosic, cupra, acetate, etc.), and these can be used alone or in combination. However, hydrophilic fibers exclude hydrophilized polyester fibers (polyester fibers that have been hydrophilized and have a moisture regain under standard conditions within the range of hydrophilic fibers).

[0069] The basis weight of the nonwoven or woven fabric used in the present invention is preferably 10 g / m 2 More preferably, 20 g / m 2 or more, and preferably 100 g / m 2 Less than 80 g / m 2 More preferably 60 g / m or less 2 Below are the results.

[0070] The mass ratio of the liquid cleaning composition for hard surfaces of the present invention to the mass of the nonwoven fabric or woven fabric (impregnation rate (mass %)) is preferably 100 mass % or more, more preferably 150 mass % or more, and preferably 250 mass % or less, more preferably 200 mass % or less. From the viewpoint of exerting wiping effect, the impregnation rate is preferably 100 mass % or more, and from the viewpoint of preventing moisture from entering the interior of precision equipment such as keyboards, the impregnation rate is preferably 250 mass % or less. The impregnation rate is calculated using the following formula. Impregnation rate (mass%) = ((mass of nonwoven fabric or woven fabric impregnated with the liquid cleaning composition for hard surfaces) / (mass of dried nonwoven fabric or woven fabric) - 1) x 100

[0071] The method of wiping a hard surface using the wiping and cleaning sheet for hard surfaces of the present invention involves pressing the wiping and cleaning sheet for hard surfaces of the present invention against the target hard surface and applying external force by hand or the like within a range that does not damage the area to be cleaned, thereby transferring dirt adhering to the area to be cleaned to the wiping and cleaning sheet, and this may be done by rubbing, kneading, or tapping. [Example]

[0072] The components used in the examples and comparative examples are listed below.

[0073] <Component (a)> Malic acid: Fuso Chemical Co., Ltd. Tartaric acid: Fujifilm Wako Pure Chemical Industries, Ltd. Lactic acid: Kanto Chemical Co., Ltd.

[0074] <Component (a') (comparison component of component (a))> Succinic acid: Fujifilm Wako Pure Chemical Industries, Ltd. ·Sulfuric acid ·hydrochloric acid

[0075] <(b) Component> Sodium silicate: Fujifilm Wako Pure Chemical Industries, Ltd. Potassium silicate: Fujifilm Wako Pure Chemical Industries, Ltd.

[0076] <(c) component> Monoethanolamine: Nippon Shokubai Co., Ltd., component (c1) 2-Amino-2-methyl-1-propanol: Fujifilm Wako Pure Chemical Industries, Ltd., component (c1) Triethanolamine: Component (c1) manufactured by Tokyo Chemical Industry Co., Ltd. Sodium carbonate: Fujifilm Wako Pure Chemical Industries, Ltd., ingredient (c2) Potassium carbonate: Fujifilm Wako Pure Chemical Industries, Ltd., ingredient (c2) Sodium hydroxide

[0077] <(d) component> Sodium dodecylbenzenesulfonate: Kao Corporation's sodium alkylbenzenesulfonate, which has a benzyl group bonded to the secondary carbon atom of a linear 12-carbon alkyl group (product name: Neoperex G25). Benzalkonium chloride: manufactured by Kao Corporation, R in the general formula (11d) 11d is an alkyl group having 12 to 16 carbon atoms, R 12d and R 13d is a methyl group, X - is a chloride ion (product name: Sanisol B-50) Lauryl dimethylamine oxide: manufactured by Kao Corporation (product name: Amphitol 20N) Alkyl glycoside: manufactured by Kao Corporation. In the general formula (1d), G is glucose and R 1d is an alkyl group having 10 to 14 carbon atoms (C10-14) (mass ratio: C10 / C12 / 14=60 / 30 / 10), x is 0, and y is an average of 1.3 (a mixture of monosaccharides, disaccharides, and trisaccharides) Polyoxyethylene lauryl ether: manufactured by Kao Corporation, R 3d is an alkyl group having 12 carbon atoms, AO is an ethyleneoxy group, and n is 6 (product name: Emulgen 108) Polyoxyethylene sorbitan fatty acid ester: Polyoxyethylene sorbitan monolaurate (average number of oxyethylene moles added: 20) manufactured by Kao Corporation (product name: Rheodor TW-L120)

[0078] [Preparation of Liquid Cleaning Composition for Hard Surfaces] The liquid detergent compositions for hard surfaces shown in Tables 1 to 3 were prepared using the ingredients described above, and the following items were evaluated. The results are shown in Tables 1 to 3. To prepare the liquid detergent compositions for hard surfaces shown in Tables 1 to 3, first, component (a) or component (a'), component (b), component (c), and component (d) were added to deionized water so as to obtain the amounts shown in the tables, and dissolved at room temperature (20°C). Sodium hydroxide was then added, and the pH at 25°C was adjusted to the values ​​shown in Tables 1 to 3. The pH was measured using a glass electrode method. The content of each component in Tables 1 to 3 is expressed as a percentage by mass and is based on the active ingredient. The content of component (a) is expressed as the acid content. For sodium hydroxide, the amount remaining after neutralizing the acid component was considered to be the sodium hydroxide content. The content of each component in Tables 1 to 3 was adjusted using the amount of deionized water, and for convenience, the content of deionized water is referred to as the "balance." The viscosity of each of the liquid detergent compositions for hard surfaces of the present invention is 2.8±0.5 mPa·s.

[0079] [Aluminum discoloration evaluation] An aluminum test piece (product name: A1050P, 1.0 x 20 x 50 mm, manufactured by Nippon Test Panel Co., Ltd.) was placed at an angle in a transparent container, and each of the hard surface liquid cleaner compositions shown in Tables 1 to 3 was added in an amount sufficient to immerse the test piece halfway. The container was then left to stand in a storage cabinet set at 50°C, and the appearance was observed after 24 hours. The change in appearance was evaluated according to the following criteria. The results are shown in Tables 1 to 3. ◎: No change, good appearance ◯: Almost no change, good appearance. △: Slight change, slight problem in appearance, but no problem in actual use ×: Discoloration, problems with appearance, problems with practical use

[0080] [White residue evaluation] Each of the liquid cleaning compositions for hard surfaces listed in Tables 1 to 3 was placed in a sprayer, and 1 mL of each was sprayed onto a black polypropylene test piece (7 cm x 15 cm) using the sprayer, and the test piece was left at room temperature (25°C). After 24 hours, the surface was visually observed, and the amount of white residue for each composition was evaluated according to the following criteria. The results are shown in Tables 1 to 3. ◎: No white residue, good appearance ◯: Almost no white residue remains, and the appearance is good. △: A slight white residue remains, causing some problems in appearance, but no problems in actual use ×: White remains, there is a problem with appearance, and there is a problem with actual use

[0081] [Table 1]

[0082] [Table 2]

[0083] [Table 3]

[0084] Preparation of Sheets Impregnated with Liquid Cleaning Compositions for Hard Surfaces Each of the liquid cleaning compositions for hard surfaces of Examples 1, 13, 18, and 20 in Tables 1 and 2 was impregnated into the nonwoven fabric shown below so that the impregnation rate calculated using the following formula was 200 mass % to prepare wiping sheets for hard surfaces. The thus prepared wiping sheets for hard surfaces of the present invention leave few wiping streaks, have excellent corrosion resistance and leave little white residue after wiping hard surfaces including metal surfaces such as aluminum. Nonwoven fabric: Made by Taketora Co., Ltd. (product name: Centrarch II), containing polyethylene terephthalate (PET) fiber and rayon fiber in the base material, with a rayon fiber content of 70% by mass and a polyethylene terephthalate (PET) fiber content of 30% by mass, and a basis weight of approximately 30 g / m 2 Impregnation rate (mass%)=((mass of nonwoven fabric impregnated with hard surface liquid cleaning composition) / (mass of dried nonwoven fabric)−1)×100

Claims

1. A liquid cleaning composition for hard surfaces, comprising: (a) an α-hydroxycarboxylic acid and / or a salt thereof having a molecular weight of 210 or less and having one to two carboxyl groups (hereinafter referred to as component (a)); (b) a silicate (hereinafter referred to as component (b)); (c) an alkaline agent other than component (b) (hereinafter referred to as component (c)); and water, and having a pH of 9 to 14 at 25°C.

2. 2. The liquid cleaning composition for hard surfaces according to claim 1, comprising 0.01% by mass or more and 2% by mass or less of component (a) and 0.001% by mass or more and 0.2% by mass or less of component (b).

3. 3. The liquid cleaning composition for hard surfaces according to claim 1, comprising 0.05% by mass or more and 5% by mass or less of component (c).

4. 4. The liquid detergent composition for hard surfaces according to claim 3, wherein component (c) is at least one selected from the group consisting of alkanolamines, alkali metal carbonates, and alkali metal hydroxides.

5. The liquid detergent composition for hard surfaces according to claim 1 or 2, further comprising (d) a surfactant (hereinafter referred to as component (d)).

6. A wiping and cleaning sheet for hard surfaces, comprising the liquid detergent composition for hard surfaces according to claim 1 or 2 and a nonwoven fabric or a woven fabric.

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