Aqueous cleaning agent composition

Abstract

To obtain a cleaning agent composition that removes ion deposits generated on automobiles and the like. [Solution] A detergent composition containing one or more selected from alkali metal hydrogen fluoride salts and ammonium hydrogen fluoride in an amount of 1.0 to 4.5 parts by mass per 100 parts by mass of aqueous solvent, and an amine oxide compound.

Description

[Technical Field]

[0001] This invention relates to an aqueous cleaning agent composition. [Background technology]

[0002] On the bodies, glass, and metal-plated parts of automobiles and other vehicles, dirt accumulates over time due to tap water, rainwater, and sea breeze, often resulting in white stains called ion deposits. Ion deposits occur when calcium, magnesium, and silica contained in water droplets remain on the surface of paint or other materials after the evaporation of tap water or rainwater. A method for removing such ion deposits by polishing with an abrasive is known (Patent Document 1). However, this method has the problem of damaging the painted surface through polishing and requiring a long application time. Furthermore, a method for removing ion deposits using acidic cleaning agents containing fluoride salts, such as ammonium hydrogen fluoride, is also known (Patent Document 2). However, the removal power was not sufficient compared to abrasives.

[0003] It is said that limescale can be completely removed with Magic Clean (registered trademark) (containing alkylamine oxide, etc.). However, ion deposits are different from limescale and cannot be removed with such cleaning agents. Cleaning compositions containing acid fluorides such as ammonium hydrogen fluoride, anionic synthetic detergents, cationic quaternary ammonium surfactants, amphoteric surfactants, coconut diethanolamide, and nonionic surfactants such as amine oxide are known for dissolving, emulsifying, and removing organic contaminants adhering to the wheels of automobiles and trucks (Patent Document 3). However, these cleaning compositions remove organic contaminants and do not suggest the removal of limescale, let alone ion deposits. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2004-231767 [Patent Document 2] Japanese Patent Publication No. 2024-175228 [Patent Document 3] Special Publication No. 9-511262 [Overview of the project] [Problems that the invention aims to solve]

[0005] The objective of this invention is to provide a cleaning agent composition that removes ion deposits generated on automobiles and the like. [Means for solving the problem]

[0006] The aqueous cleaning agent composition of the present invention is as follows: 1. An aqueous cleaning agent composition containing one or more selected from alkali metal hydrogen fluoride salts and ammonium hydrogen fluoride in an amount of 1.0 to 4.5 parts by mass per 100 parts by mass of aqueous solvent, and an amine oxide compound. 2. The aqueous cleaning agent composition according to claim 1, which contains one or more selected from surfactants, chelating agents, thickeners, organic acids, fragrances, preservatives, and dyes. [Effects of the Invention]

[0007] The aqueous cleaning agent composition of the present invention exhibits the effect of reliably removing ion deposits attached to surfaces. [Modes for carrying out the invention]

[0008] The ion deposits removed by the cleaning agent composition of the present invention are impurities such as minerals contained in water that adhere to the car body and other surfaces, leaving behind white ring-shaped deposits. These ion deposits are more difficult to remove than black water stains formed on a car's body from soot, oil, wax, detergents, and minerals in the air. Furthermore, they differ from water spots, which are paint damage caused by water droplets on the car's body acting as convex lenses to concentrate sunlight.

[0009] [One or more selected from alkali metal hydrogen fluoride salts and ammonium hydrogen fluoride] The total amount of one or more selected alkali metal hydrogen fluoride salts and ammonium hydrogen fluoride contained in the aqueous cleaning agent composition of the present invention is 1.0 part by mass or more, preferably 1.5 parts by mass or more, more preferably 2.0 parts by mass or more, and even more preferably 2.5 parts by mass or more, per 100 parts by mass of aqueous solvent. The greater the amount of alkali metal hydrogen fluoride salts and ammonium hydrogen fluoride contained, the shorter the time required to remove ion deposits may be, or the more reliably they may be removed. Alternatively, the amount may be 4.5 parts by mass or less, preferably 4.3 parts by mass or less, more preferably 4.1 parts by mass or less, and even more preferably 4.0 parts by mass or less, per 100 parts by mass of aqueous solvent. Furthermore, the amount is 1.0 to 4.5 parts by mass, preferably 1.5 to 4.3 parts by mass, more preferably 2.0 to 4.1 parts by mass, and even more preferably 2.5 to 4.0 parts by mass, per 100 parts by mass of aqueous solvent. The lower the amount of one or more selected from alkali metal hydrogen fluoride salts and ammonium hydrogen fluoride contained, the potentially better the handling properties of the aqueous cleaning agent composition of the present invention. Furthermore, among the alkali metal salts of hydrogen fluoride and ammonium hydrogen fluoride, one or more selected from ammonium hydrogen fluoride, sodium hydrogen fluoride, and potassium hydrogen fluoride are particularly preferred.

[0010] [Amine oxide compounds] The amine oxide compound used in the present invention is a compound represented by (Formula 1) or (Formula 2) below. The amine oxide compound used may be one type or two or more types. JPEG2026166309000001.jpg35170R 1 This is a linear or branched substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or a linear or branched substituted or unsubstituted alkenyl group having 1 to 30 carbon atoms. R 2 , R 3 These are independently C1-C3 alkyl groups or C1-C3 hydroxyalkyl groups. R 4is an alkylene group having 1 to 5 carbon atoms, and Y is -CONR 5 -, -NR 5 CO-, -COO-, or -OCO- (where R 5 represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms).

[0011] As such amine oxide compounds, R 2 , R 3 are each preferably a methyl group, R 2 , R 3 are each a methyl group, and R 1 is more preferably an alkyl group having 6 to 30 carbon atoms, R 2 , R 3 are each a methyl group, and R 1 is further preferably an alkyl group having 8 to 25 carbon atoms, R 2 , R 3 are each a methyl group, and R 1 is most preferably an alkyl group having 10 to 20 carbon atoms. Specific examples include dimethyloctylamine oxide, dimethylnonylamine oxide, dimethylundecylamine oxide, dimethyltridecylamine oxide, dimethylpentadecylamine oxide, dimethyllaurylamine oxide, dimethylmyristylamine oxide, dimethyldodecylamine oxide, dimethyldecylamine oxide, dimethyltetradecylamine oxide, cocoalkyldimethylamine oxide, lauryl-bis(2-hydroxyethyl)amine oxide, myristyl-bis(2-hydroxyethyl)amine oxide, cocoalkyl-bis(2-hydroxyethyl)amine oxide, and the like.

[0012] Further, the amount of the amine oxide compound contained in the aqueous detergent composition of the present invention is preferably 0.001 parts by mass or more, more preferably 0.01 parts by mass or more, still more preferably 0.1 parts by mass or more, and most preferably 0.2 parts by mass or more, relative to 100 parts by mass of the aqueous solvent. The larger the amount of the amine oxide compound contained, the shorter the time required to remove ionic deposits, or the more reliably the ionic deposits may be removed. Further, relative to 100 parts by mass of the aqueous solvent, the amount is preferably 3.0 parts by mass or less, more preferably 2.0 parts by mass or less, still more preferably 1.5 parts by mass or less, and most preferably 1.2 parts by mass or less. Further, relative to 100 parts by mass of the aqueous solvent, the amount is preferably 0.001 to 3.0 parts by mass, more preferably 0.01 to 2.0 parts by mass, still more preferably 0.1 to 1.5 parts by mass, and most preferably 0.2 to 1.2 parts by mass. If the amount of the amine oxide compound contained is excessively large, the ability to remove ionic deposits may not be further improved.

[0013] [Ratio of the content of one or more selected from alkali metal hydrogen fluorides and ammonium hydrogen fluoride to the content of the amine oxide compound] The mass ratio of one or more selected from alkali metal hydrogen fluorides and ammonium hydrogen fluoride contained in the aqueous detergent composition of the present invention to the amine oxide compound is such that the ratio of the content of the amine oxide compound to 1 part by mass of the content of the one or more selected from ammonium hydrogen fluoride and alkali metal hydrogen fluorides is preferably 0.001 or more, more preferably 0.01 or more, still more preferably 0.03 or more, and most preferably 0.06 or more. Further, the content of the amine oxide compound relative to 1 part by mass of the content of the one or more selected from ammonium hydrogen fluoride and alkali metal hydrogen fluorides is preferably 1.00 or less, more preferably 0.7 or less, still more preferably 0.5 or less, and most preferably 0.4 or less. Furthermore, the content of one or more selected from alkali metal hydrogen fluoride and ammonium hydrogen fluoride is preferably 0.001 to 1.00 parts by mass, more preferably 0.01 to 0.7 parts by mass, even more preferably 0.03 to 0.5 parts by mass, and most preferably 0.06 to 0.4 parts by mass per 1 part by mass of one or more selected from alkali metal hydrogen fluoride and ammonium hydrogen fluoride. If the amount of amine oxide compound is too high relative to one or more alkali metal salts of hydrogen fluoride and ammonium hydrogen fluoride, the ability to remove ion deposits may not improve further.

[0014] [Aqueous solvent] The aqueous cleaning agent composition of the present invention contains water as a solvent. Preferred waters include deionized water, household tap water, and industrial tap water. Furthermore, within the limits that do not impair the effects of the present invention, one or more substances selected from alcohols, glycols, glycol ethers, etc., may be included.

[0015] (Alcohols contained) Examples of the alcohols mentioned above include one or more selected from methanol, ethanol, propanol, butanol, pentanol, hexanol, heptanol, and octanol.

[0016] (Glycols contained) The glycols mentioned above include one or more from ethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butylene glycol, hexylene glycol, diethylene glycol, triethylene glycol, glycerin, etc., but among these, ethylene glycol or propylene glycol is particularly preferred.

[0017] (Contained glycol ethers) Examples of the glycol ethers mentioned above include one or more selected from ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, tetraethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, triethylene glycol monoethyl ether, tetraethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, and tetraethylene glycol monobutyl ether.

[0018] In addition, trivalent alcohols such as glycerin, trimethylolethane, trimethylolpropane, 5-methyl-1,2,4-heptanetriol, or 1,2,6-hexanetriol can also be used.

[0019] The following surfactants, chelating agents, thickeners, organic acids, fragrances, preservatives, dyes, antibacterial agents, and defoaming agents may be added independently, or not, as long as they do not impair the effects of the present invention.

[0020] The detergent composition may contain one or more surfactants selected from the list below. Including these surfactants may potentially improve the effects of the present invention. [Surfactants] (Anionic surfactants) As anionic surfactants, saturated fatty acids with 8 to 24 carbon atoms, unsaturated fatty acids with 8 to 24 carbon atoms, acrylic acid, maleic anhydride, fumaric acid, dienes, or unsaturated fatty acids with 8 to 24 carbon atoms modified with dienophils, resin acids, resin acids modified with acrylic acid, maleic anhydride, fumaric acid, dienes, or dienophils, natural resin polymers, tannins, lignin polymers, polyacrylic acid, polyacrylic acid derivatives, alkyl sulfonates, alkylbenzene sulfonic acid, alkyl sulfates, alkylphosphonic acid, alkyl phosphates, phenolic resins, and mixtures thereof can be used.

[0021] Among them, polyoxyethylene alkyl ether sulfates such as sodium polyoxyethylene lauryl ether sulfate, polyoxyethylene lauryl sulfate triethanolamine, sodium polyoxyethylene lauryl sulfate, polyoxyethylene alkylphenyl ether sulfate, polyoxyethylene monostyrylphenyl ether sulfate, polyoxyethylene distyrylphenyl ether sulfate, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkylphenyl ether phosphate, polyoxyethylene monostyrylphenyl ether phosphate, polyoxyethylene distyrylphenyl ether phosphate, polyoxyethylene alkyl Examples include ether carboxylates, polyoxyethylene alkylphenyl ether carboxylates, polyoxyethylene monostyrylphenyl ether carboxylates, polyoxyethylene distyrylphenyl ether carboxylates, naphthalene sulfonate formalin condensates, melanin sulfonate formalin condensates, dialkyl sulfosuccinate esters, alkyl sulfosuccinate dis, polyoxyethylene alkyl sulfosuccinate dis, alkyl sulfoacetates, α-olefin sulfonates, alkylbenzene sulfonates, alkylnaphthalene sulfonates, alkyl sulfonates, N-acyl amino acid salts, acylated peptides, and soaps. Examples of salts of these anionic surfactants include one or more selected from alkali metal salts such as sodium salts and potassium salts, ammonium salts, and organic ammonium salts.

[0022] Examples of amphoteric surfactants include alkyl betaine and alkyl β-alanine.

[0023] Examples of nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene higher alcohol ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene fatty acid esters, polyhydric alcohol fatty acid esters, polyoxyethylene polyhydric alcohol fatty acid esters, polyoxyethylene fatty acid amides, sorbitan mono fatty acid esters, sorbitan di fatty acid esters, sorbitan tri fatty acid esters, polyoxyethylene sorbitan mono fatty acid esters, polyoxyethylene sorbitan di fatty acid esters, polyoxyethylene sorbitan tri fatty acid esters, polyoxyethylene sorbitol fatty acid esters, glycerin fatty acid esters, sucrose fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkylamines, and polyoxyethylene fatty acid amides.

[0024] (Cationic surfactants) Cationic surfactants include, (i) A fatty acid having 12 to 24 carbon atoms is modified with at least one of acrylic acid, maleic anhydride, fumaric acid, diene, and dienophil, and the resulting product is reacted with a polyalkylene polyamine to obtain an aliphatic imideamine. (ii) A fatty acid having 12 to 24 carbon atoms is modified with at least one of acrylic acid, maleic anhydride, fumaric acid, diene, and dienophil, and the product obtained by reacting the modified product with at least one of polyalkylene polyamine, saturated alkyl monoamine having 12 to 24 carbon atoms, unsaturated alkyl monoamine having 12 to 24 carbon atoms, saturated alkyl polypropylene polyamine having 12 to 24 carbon atoms, or unsaturated alkyl polypropylene polyamine having 12 to 24 carbon atoms to obtain an aliphatic amide amine; a saturated alkyl monoamine having 12 to 24 carbon atoms is modified with at least one of ethylene oxide or propylene oxide to obtain a polyoxyethylene derivative; a polyoxyethylene derivative having 12 to 24 carbon atoms is modified with at least one of ethylene oxide or propylene oxide; Polyoxyethylene derivatives obtained by modifying a saturated alkylpolypropylene polyamine with 12 to 24 carbon atoms with at least one of ethylene oxide or propylene oxide; polyoxyethylene derivatives obtained by modifying an unsaturated alkylpolypropylene polyamine with 12 to 24 carbon atoms with at least one of ethylene oxide or propylene oxide; saturated alkylallyl monoamine with 12 to 24 carbon atoms; unsaturated alkylallyl monoamine with 12 to 24 carbon atoms; saturated alkylallyl polypropylene polyamine with 12 to 24 carbon atoms; unsaturated alkylallyl polypropylene polyamine with 12 to 24 carbon atoms; saturated quaternary amine with 12 to 24 carbon atoms; unsaturated quaternary amine with 12 to 24 carbon atoms; amine derivatives of tannins; amine derivatives of phenolic resins; amine derivatives of lignins; amine-modified polyacrylates; and mixtures thereof can be used.

[0025] (Nonionic surfactant) Nonionic surfactants that can be used include polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyalkylene alkyl ethers, polyoxyethylene alkenyl ethers, polyoxyalkylene alkylphenyl ethers, reverse pluronic block polymers, reverse tetratronic block polymers, sucrose fatty acid esters, sorbitan fatty acid esters, polyethylene glycol fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polypropylene glycol fatty acid esters, coconut fatty acid diethanolamide, lauric acid diethanolamide, lauric acid myristic acid diethanolamide, myristic acid diethanolamide, oleic acid diethanolamide, palm kernel fatty acid diethanolamide, alkyl glucosides, amine oxides, etc.

[0026] (Amphoteric surfactant) As amphoteric surfactants, fatty acids with 12 to 24 carbon atoms are modified with at least one of acrylic acid, maleic anhydride, fumaric acid, diene, and dienophil, and the products obtained from this modification are polyethylene polyamine, lithium alkylamidopropyl halide methylcarboxylate betaine with 12 to 24 carbon atoms, sodium alkylamidopropyl halide methylcarboxylate betaine with 12 to 24 carbon atoms, potassium alkylamidopropyl halide methylcarboxylate betaine with 12 to 24 carbon atoms, and alkylamidopropyl Products obtained by reacting at least one of the following with lithium betaine phosphate (a pyru-halide), sodium betaine phosphate (an alkylamidopropyl halide with 12 to 24 carbon atoms), potassium betaine phosphate (an alkylamidopropyl halide with 12 to 24 carbon atoms), lithium betaine sulfate (an alkylamidopropyl halide with 12 to 24 carbon atoms), sodium betaine sulfate (an alkylamidopropyl halide with 12 to 24 carbon atoms), and potassium betaine sulfate (an alkylamidopropyl halide with 12 to 24 carbon atoms) can be used. Furthermore, the amine oxide compounds in this invention are not considered amphoteric surfactants.

[0027] (Chelating agent) One or more chelating agents selected from the list below may be included in the aqueous cleaning agent composition. Including such agents may potentially improve the effects of the present invention. Examples of chelating agents include condensed phosphoric acid compounds such as tripolyphosphate, hexametaphosphate, or salts thereof; aminocarboxylic acid type chelating agents such as nitrilotriacetic acid, ethylenediaminetetraacetic acid, glutamic acid diacetic acid, methylglycine diacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, hydroxyethylethylenediaminetriacetic acid, or salts thereof; hydroxycarboxylic acid type chelating agents such as malic acid, citric acid, succinic acid, fumaric acid, gluconic acid, tartaric acid, or salts thereof; and phosphonic acid type chelating agents.

[0028] (Thickening agent) By including a thickening agent in the aqueous cleaning agent composition of the present invention, the adhesion of the aqueous cleaning agent composition to the surface to be cleaned during use can be improved. However, the inclusion of a thickening agent is not required. Such thickeners are not particularly limited, but the following are examples. When a thickener is included in the aqueous cleaning agent composition of the present invention, its content is preferably 0.05 to 2.0% by mass, and more preferably 0.1 to 0.5% by mass, from the viewpoint of handling properties, uniform solubility, etc.

[0029] (i) Natural polymers of plant origin such as guar gum, locust bean gum, carrageenan, alginic acid, gum arabic, and pectin. (ii) Microbial-derived natural polymers such as xanthan gum, (iii) Cellulose, starch, and starch derivatives and cellulose derivatives obtained by processing cellulose starch with oxidation, methylation, carboxymethylation, hydroxyethylation, hydroxypropylation, cationization, etc. (iv) Polyacrylic acid derivatives which are polyacrylic acid homopolymers or copolymers of monomers copolymerizable with acrylic acid, and crosslinked polyacrylic acid homopolymers or polyacrylic acid derivatives. (v) Natural polymers of animal origin such as gelatin, casein, albumin and shellac, (vi) Guar gum derivatives and locust bean gum derivatives obtained by processing guar gum and locust bean gum by oxidation, methylation, carboxymethylation, hydroxyethylation, hydroxypropylation, cationization, etc. (vii) Alginic acid derivatives such as ammonium alginate and propylene glycol alginate, (viii) Complete or incomplete saponified vinyl acetate homopolymers or copolymers of vinyl acetate and other monomers, or polyvinyl alcohol or polyvinyl alcohol derivatives obtained by crosslinking these with, for example, an aldehyde. (ix) Polyalkylene glycols such as polyethylene oxide, polypropylene oxide, copolymers of ethylene oxide and propylene oxide, (x) Polydimethylaminoethyl methacrylate and its quaternary derivatives or copolymers of dimethylaminoethyl methacrylate and monomers copolymerizable with dimethylaminoethyl methacrylate and their quaternary derivatives, ring-closed polymers of dimethyldiallylammonium chloride, and synthetic cationic polymers such as poly(N-vinyl-2,3-dimethylimidazolinium chloride) can be preferably used.

[0030] (organic acid) The aqueous cleaning agent composition of the present invention may contain an organic acid or a salt thereof, or it may not. Including such an acid may improve the effects of the present invention. Examples of organic acids include one or more aliphatic carboxylic acids and / or salts thereof, and aromatic carboxylic acids and / or salts thereof. Examples of aliphatic carboxylic acids and / or salts thereof include 2-phosphonobutane-1,2,4-tricarboxylic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, 2-ethylhexanoic acid, adipic acid, suberic acid, azelaic acid, sebacic acid, undecanoic acid, dodecanediic acid, and other dicarboxylic acids, as well as alkali metal salts thereof, preferably sodium salts and potassium salts. Examples of aromatic carboxylic acids and / or salts thereof include benzoic acid, toluic acid, p-tert-butylbenzoic acid, phthalic acid, p-methoxybenzoic acid, cinnamic acid, and their alkali metal salts, preferably sodium salts and potassium salts.

[0031] (fragrance) The fragrances that can be used in this invention are not particularly limited. Examples of such fragrances include orange oil, lemon oil, rose extract, lavender, musk, patchouli, balsam extract, sandalwood oil, pine oil, cedar, and natural extracts. Furthermore, aldehyde, ketone, or ester-based fragrance components may also be used, but are not limited to these; any known fragrance may be used.

[0032] (Preservative) The preservatives that can be used in the present invention are not particularly limited. Examples of such preservatives include known preservatives such as sodium benzoate, sodium parahydroxybenzoate, butyl parahydroxybenzoate, propyl parahydroxybenzoate, isobutyl parahydroxybenzoate, sodium propionate, thiabendazole, and isothiazolone.

[0033] (dye) The aqueous cleaning agent composition of the present invention may contain a water-soluble dye, but it is not required. A water-soluble dye with excellent stability is preferred. In the aqueous detergent composition of the present invention, the content of the water-soluble dye when it is added is preferably 0.0005 to 0.2% by mass, more preferably 0.001 to 0.1% by mass, and even more preferably 0.003 to 0.02% by mass, based on 100% by mass of the base material of the aqueous detergent composition. If the amount is less than 0.0005% by mass, it becomes difficult to visually confirm the color, resulting in poor visibility.

[0034] (Antifoaming agent) The aqueous cleaning agent composition of the present invention may contain an antifoaming agent. The content of such defoaming agents is preferably 0.001 to 1.0% by mass in the aqueous detergent composition, and more preferably 0.005 to 0.1% by mass.

[0035] The aqueous cleaning agent composition of the present invention is used exclusively for cleaning articles and equipment exposed to rain outdoors. Furthermore, it targets surfaces where ion deposits have formed, rather than so-called water stains, and for removing ion deposits from such surfaces. Examples of such articles and equipment include various vehicles, civil engineering structures, buildings, decorative objects, machinery, sanitary ware, tiles, storage units housing various equipment, and other hard surfaces. In particular, it can be used on painted surfaces, resin surfaces, glass surfaces, metal surfaces, wood surfaces, ceramic surfaces, etc., with metal surfaces, painted surfaces, resin surfaces, or glass surfaces being preferred, and especially those located outdoors and exposed to rain. The aqueous cleaning agent composition of the present invention for such surfaces does not need to contain antibacterial agents, disinfectants, or antifungal agents other than ammonium hydrogen fluoride and amine oxide compounds. Furthermore, the material may contain particles that provide abrasive properties or polymers that form films, or it may not contain them.

[0036] [Cleaning method using the aqueous cleaning agent composition of the present invention] As a method for cleaning the above-mentioned articles and equipment to remove ion deposits, water-soluble and oil-soluble contaminants on the surface of the articles and equipment are removed as necessary. After drying the surface as necessary, the surface is treated with the aqueous cleaning agent composition of the present invention. The treatment method is not particularly limited, and the aqueous cleaning agent composition of the present invention may be sprayed onto the surface by a spray, or applied by a sponge or roller. Alternatively, the article having the surface to be cleaned may be immersed in the aqueous cleaning agent composition of the present invention. Or, the surface to be cleaned may be wiped or covered with a sheet-like cleaning product, which is made by impregnating a sheet-like material such as a nonwoven fabric, woven fabric, or porous article with the aqueous cleaning agent composition of the present invention and sealing it in packaging. The time for contacting the target article with the aqueous cleaning agent composition of the present invention depends on the degree of soiling of the article, but is preferably 0.5 minutes or more, more preferably 1 minute or more, and even more preferably 1.5 minutes or more, or any necessary time. After that, the aqueous cleaning agent composition of the present invention can be removed by rinsing with water and drying to complete the cleaning. Furthermore, the surface of the article to be cleaned may be rubbed with an applicator or the like impregnated with the aqueous cleaning agent composition of the present invention. However, depending on the article, rubbing may cause scratches. In obtaining the detergent composition of the present invention, a highly concentrated solution may be prepared first and then diluted at the time of use. [Examples]

[0037] The aqueous cleaning agent compositions of the examples and comparative examples shown in Table 1 were tested for storage stability and underwent ion deposit removal tests. Note that the present invention is not limited to the following examples.

[0038] [Storage stability test] The aqueous cleaning agent compositions of the examples and comparative examples were placed in containers, sealed, and left to stand at 25°C for 24 hours. The presence or absence of precipitate was then visually checked.

[0039] [Ion deposit removal test] (Solution for creating ion deposits) The solution for creating the ion deposit was obtained by following the steps below. (1) Dissolve 1.42 g of sodium metasilicate no. hydrate in 500 g of water. (2) Hydrochloric acid was added to the solution obtained in (1) above to adjust the pH to a range of 6.5 to 7.5. (3) 0.3 g of calcium chloride was added to the solution obtained in (2) above and dissolved. (4) Water was added to the solution obtained in (3) above to make a total volume of 1 L.

[0040] (Test specimen for ion deposit removal test) Test specimens for ion deposit removal were obtained by following the procedure below. (1) A test specimen (size: 70 x 150 mm) was prepared by applying and drying the paint (TM Black 202). (2) Using a trigger spray, 1 mL of the above ion deposit preparation solution was sprayed over the entire surface of the coating film on the test piece prepared in (1). This spraying was repeated five times. (3) Dry at 50°C for 1 hour. (4) Steps (2) and (3) above were repeated a total of three times each to create ion deposits on the surface of the coating. (5) The sample was cut into 30mm x 30mm squares to form each test piece. (6) 0.3 mL each of the aqueous cleaning agent composition of the example and comparative example was dropped onto the surface of the coating of each test piece. (7) Immediately after dropping the aqueous cleaning agent composition onto the coating surface, a 30 mm x 30 mm Teflon® film was placed over it and left for 1 minute. (8) Remove the Teflon film and wash the test specimen with water to completely rinse off the aqueous cleaning agent composition. (9) The moisture on the surface of the test specimen was removed to obtain a test specimen for ion deposit removal testing.

[0041] The coating surface of the test specimens used for ion deposit removal was visually inspected and evaluated on a 5-point scale based on the following criteria. 5 points: Faint white marks remain in some areas. 4 points: There are faint white marks all over. 3 points: Some white marks remain. 2 points: There are white marks all over. 1 point: Not removed

[0042] [Table 1] JPEG2026166309000003.jpg82170

[0043] (Examples 1-11 and Comparative Examples 1-7) By using ammonium hydrogen fluoride or sodium hydrogen fluoride in combination with an amine oxide compound, ion deposits on the surface of the coating could be removed without rubbing the surface. Since this method can remove ion deposits, it can also be used to remove limescale, which is easier to remove. In contrast, Comparative Example 1, which used only ammonium hydrogen fluoride, and Comparative Examples 2-6, which contained anionic surfactants other than amine oxide, cationic surfactants, nonionic surfactants, or amphoteric surfactants instead of amine oxide compounds, were unable to adequately remove ion deposits from the coating film. Furthermore, Comparative Example 7, which used a large amount of sodium hydrogen fluoride (sodium acid fluoride), showed good sodium deposit removal but poor storage stability.

Claims

1. An aqueous cleaning agent composition containing one or more selected from alkali metal hydrofluoric acid salts and ammonium hydrofluoric acid in an amount of 1.0 to 4.5 parts by mass per 100 parts by mass of aqueous solvent, and an amine oxide compound.

2. The aqueous cleaning agent composition according to claim 1, comprising one or more selected from surfactants, chelating agents, thickeners, organic acids, fragrances, preservatives, and dyes.

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