Alkaline cleaning agent composition

Abstract

To provide a detergent composition that has high cleaning effect on sticky oil stains, and burnt and stuck stains of denatured oil, and also has high storage stability.SOLUTION: A liquid detergent composition contains sodium hydroxide and / or potassium hydroxide, predetermined benzenesulfonate or a salt thereof, an anion surfactant, a predetermined nonionic surfactant, and a glycol ether solvent as active ingredients.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an alkaline cleaning agent composition having excellent cleaning performance and storage stability. In particular, the present invention relates to a liquid alkaline cleaning agent composition having excellent cleaning performance against denatured, sticky oil stains, charred stains, and greasy oil stains adhering to hard surfaces.

Background Art

[0002] On hard surfaces such as kitchens, kitchens, floors, and cooking utensils that are used for cooking using cooking oil, etc., there adhere greasy oil stains, sticky oil stains that have been denatured by heating and oxidized to increase viscosity, and charred stains.

[0003] Conventionally, it is known that for such oil stains, cleaning by the combined use of an alkaline component such as sodium hydroxide or potassium hydroxide, various surfactants, and a solvent is effective (Patent Documents 1-3).

[0004] On the other hand, in order to enhance the cleaning power against sticky stains and charred stains of denatured oil, if a large amount of an alkaline component or a solvent is included in the cleaning agent composition, the storage stability of the composition may be impaired, or the greasy oil stains may swell due to a high alkaline component concentration and the cleaning power may be significantly reduced. Also, in order to enhance the cleaning power against greasy oil stains, if a large amount of various surfactants and a solvent are included in the cleaning agent composition, the cleaning power against sticky stains and charred stains of denatured oil may decrease.

[0005] Regarding such problems, in Patent Document 4, it is disclosed that by further blending amine oxide and alkyl polyglucoside in addition to an alkaline component such as sodium hydroxide or potassium hydroxide, a liquid cleaning agent composition having a cleaning effect on both charred stains and oil stains and excellent stability can be obtained.

[0006] However, in this field, there is still a strong need for the development and provision of cleaning agent compositions that have a high cleaning effect against sticky oil stains, stubborn and burnt-on oil stains, and excellent storage stability. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Patent No. 1876313 [Patent Document 2] Japanese Patent Application Publication No. 08-311487 [Patent Document 3] Patent No. 4082576 [Patent Document 4] Patent No. 5579761 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The present invention aims to provide a cleaning agent composition that has a high cleaning effect against sticky oil stains, stubborn stains of modified oil, and burnt-on stains, and also has excellent storage stability. [Means for solving the problem]

[0009] As a result of diligent research to solve the above problems, the present inventors have found that a liquid alkaline cleaning agent composition comprising sodium hydroxide and / or potassium hydroxide, a specified benzenesulfonic acid or its salt, an anionic surfactant, a specified nonionic surfactant, and a glycol ether-based solvent as active ingredients has a high cleaning effect against sticky oil stains, modified oil stains, and burnt-on stains, as well as excellent storage stability.

[0010] This invention is based on these findings and encompasses the following inventions. [1] Alkaline cleaning agent composition containing the following components (a) to (f): (a) sodium hydroxide and / or potassium hydroxide, (b) One or more benzenesulfonic acids or salts thereof that are substituted with 1 to 3 alkyl groups having 1 to 3 carbon atoms, (c) Anionic surfactants, (d) Nonionic surfactant selected from compounds represented by the following general formulas (1) and (2) R1-O-(G1)n···(1) (In the formula, R1 represents an alkyl group having 6 to 16 carbon atoms, G1 represents a sugar residue having 5 to 6 carbon atoms, and n represents the number of average condensation degrees from 1 to 3.) R2a-CO-NR2b-(G2)n···(2) (In formula (2), R2a represents an alkyl group or alkenyl group having 7 to 17 carbon atoms, R2b represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a hydroxyalkyl group having 1 to 4 carbon atoms, G2 represents a sugar residue having 5 to 6 carbon atoms, and n represents the number of average condensation degrees from 1 to 3.) (e) Glycol ether-based solvent in 1 to 15% by mass, (f) Water. [2] The alkaline cleaning agent composition of [1], wherein the benzenesulfonic acid or salt thereof described in (b) above is one or more selected from the group consisting of cumenesulfonic acid, xylenesulfonic acid, toluenesulfonic acid, and alkali metal salts thereof. [3] The alkaline cleaning agent composition according to [1] or [2], wherein the total amount of components (a) and (c) is 2 to 35% by mass, the total amount of components (b) and (d) is 1.0 to 15% by mass, and the mass ratio of {(a)+(c)} / {(b)+(d)} is 1 to 20. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a cleaning agent composition that has a high cleaning effect against sticky oil stains, stubborn stains of modified oil, and burnt-on stains, and also has excellent storage stability. [Modes for carrying out the invention]

[0012] The present invention relates to an alkaline cleaning agent composition, characterized by containing the following components (a) to (f).

[0013] (a) sodium hydroxide and / or potassium hydroxide The (a) sodium hydroxide and / or potassium hydroxide (hereinafter sometimes referred to as "component (a)") used in the present invention may be used individually or in combination with both.

[0014] Component (a) can be blended into the composition of the present invention in a proportion of 0.1 to 15% by mass, preferably 0.5 to 15% by mass, more preferably 1 to 15% by mass, even more preferably 2 to 10% by mass, and particularly preferably 5 to 10% by mass (for example, 6 to 10% by mass, 7 to 10% by mass, etc.). If the proportion is less than 0.1% by mass, the cleaning performance against various oil stains and storage stability may not be sufficient, while if it exceeds 15% by mass, the balance with other components may be disrupted and the desired effect may not be obtained. Particularly preferably, component (a) is blended in an amount that satisfies the following total amount with component (c) and the following mass ratio relationship with components (b), (c), and (d). In this specification, the amount of each component is indicated in mass percent, with the amount of the composition of the present invention being 100% by mass.

[0015] (b) benzenesulfonic acid or its salt The (b) benzenesulfonic acid or a salt thereof used in the present invention (hereinafter sometimes referred to as "component (b)") includes benzenesulfonic acid or a salt thereof in which 1 to 3 alkyl groups having 1 to 3 carbon atoms are substituted. Examples of such benzenesulfonic acid include cumenesulfonic acid, xylenesulfonic acid, and toluenesulfonic acid. The "salt" is not particularly limited, but examples include metal salts, amine salts, alkanolamine salts, and ammonium salts, and is preferably an alkali metal salt such as sodium. Component (b) may be a single component or a combination of two or more. In particular, from the viewpoint of balance with other components, storage stability, and washing performance, p-toluenesulfonate sodium, xylenesulfonate sodium, and cumenesulfonate sodium are preferred.

[0016] Component (b) can be blended in the composition of the present invention at a ratio of 0.01 to 5% by mass, preferably 0.05 to 2% by mass, more preferably 0.1 to 2% by mass, and particularly preferably 0.5 to 2% by mass. If it is less than 0.01% by mass, the storage stability may not be sufficient. On the other hand, if it exceeds 5% by mass, the balance with other components may be disrupted and the desired effect may not be obtained. Particularly preferably, component (b) is blended in an amount that satisfies the following total amount with component (a) and the following mass ratio relationship with components (a), (b), and (d).

[0017] (c) Anionic surfactant As the (c) anionic surfactant (hereinafter sometimes referred to as "component (c)") used in the present invention, an anionic surfactant generally used in liquid detergent compositions can be used. For example, alkylbenzene sulfonates, alkyl sulfonates, olefin sulfonates, alkyl ether sulfates, alkyl sulfates, fatty acid salts, and those derived from their oxyethylene (EO) adducts (for example, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl phenyl ether sulfates, polyoxyethylene monoalkyl, dialkyl, sesquialkyl phosphates, etc.) can be mentioned, but are not limited thereto. The "salt" is not particularly limited, but metal salts such as sodium, potassium, and magnesium, alkanolamine salts such as monoethanolamine salt, diethanolamine salt, and triethanolamine salt, and ammonium salts are preferred. Component (c) may be a single component or a combination of two or more components. Particularly, from the viewpoints of balance with other components, storage stability, and washing performance, alkylbenzene sulfonates, alkyl sulfonates, alkyl ether sulfates, and fatty acid salts are preferred, and particularly, a combination of alkylbenzene sulfonate and alkyl ether sulfate is preferred.

[0018] Component (c) can be blended in the composition of the present invention at a ratio of 0.5 to 20% by mass, preferably 1 to 15% by mass, more preferably 1.5 to 15% by mass, and particularly preferably 3.5 to 15% by mass. If it is less than 0.5% by mass, the cleaning performance and storage stability against various oil stains may not be sufficient. On the other hand, if it exceeds 20% by mass, the balance with other components may be disrupted and the desired effect may not be obtained. Particularly preferably, component (c) is blended in an amount that satisfies the following total amount with component (a) and the following mass ratio relationship with components (a), (b), and (d).

[0019] (d) Nonionic surfactant As the nonionic surfactant (d) used in the present invention (hereinafter sometimes referred to as "component (d)"), the general formula (1): R1-O-(G1)n [wherein, "R1" represents an alkyl group having 6 to 16 carbon atoms, "G1" represents a sugar residue having 5 to 6 carbon atoms, "n" represents a number with an average degree of condensation of 1 to 3, "O" represents an oxygen atom, and "-" represents a covalent bond, respectively.] The nonionic surfactant compound represented by is mentioned. Examples of component (d) represented by the above general formula (1) include alkyl glucosides having the above predetermined structure. For example, hexyl polyglucoside, heptyl polyglucoside, isoheptyl polyglucoside, octyl polyglucoside, 2-ethylhexyl polyglucoside, nonyl polyglucoside, isononyl polyglucoside, decyl polyglucoside, dodecyl polyglucoside, etc. are mentioned, but it is not limited thereto.

[0020] Furthermore, the component (d) used in the present invention includes nonionic surfactant compounds represented by the general formula (2): R2a-CO-NR2b-(G2)n [wherein "R2a" represents an alkyl group having 7 to 17 carbon atoms, or an alkenyl group; R2b represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a hydroxyalkyl group having 1 to 4 carbon atoms; "G2" represents a sugar residue having 5 to 6 carbon atoms; "n" represents the number of average condensation degrees 1 to 3; "C" represents a carbon atom; "O" represents an oxygen atom; "N" represents a nitrogen atom; and "-" represents a covalent bond.]. Examples of component (d) represented by the general formula (2) above include alkylglucamides having the above-described predetermined structure, such as decylglucamide, dodecylglucamide, and myristylglucamide, but are not limited to these.

[0021] Component (d) used in the present invention may be a single component selected from the above compounds, or a combination of two or more components.

[0022] Component (d) can be incorporated into the composition of the present invention in a proportion of 0.5 to 10% by mass, preferably 1 to 10% by mass, more preferably 1 to 5% by mass (for example, 1.5 to 5% by mass, 2 to 5% by mass), and particularly preferably 2.5 to 5% by mass. If the proportion is less than 0.5% by mass, the cleaning performance against various oil stains and storage stability may not be sufficient, while if it exceeds 10% by mass, sufficient cleaning performance may not be obtained. Particularly preferably, component (d) is incorporated in an amount that satisfies the following total amount with component (b) and the following mass ratio relationship with components (a), (b), and (c).

[0023] Particularly preferably, in the alkaline cleaning agent composition of the present invention, the amount of the components blended is selected from the range such that the total amount of component (a) and component (c) is 2 to 35% by mass, preferably 2 to 30% by mass, more preferably 2.5 to 25% by mass (e.g., 5 to 25% by mass, 8 to 25% by mass, 10 to 25% by mass), particularly preferably 13.5 to 25% by mass, the total amount of component (b) and (d) is 1.0 to 15% by mass, preferably 1.0 to 10% by mass, more preferably 1.0 to 7% by mass (e.g., 2 to 7% by mass), particularly preferably 3 to 7% by mass, and the mass ratio of {(a)+(c)} / {(b)+(d)} is 1 to 20, preferably 1 to 15, more preferably 1 to 10 (e.g., 2 to 10% by mass, 3 to 10% by mass), even more preferably 3.5 to 6, particularly preferably 3.5 to 4.5. By ensuring that the amounts of components (a), (b), (c), and (d) in the composition of the present invention are within the above range, an alkaline cleaning agent composition can be obtained that has a high cleaning effect against various oil stains and excellent storage stability.

[0024] (e) Glycol ether-based solvents The glycol ether solvent used in the present invention can be one that is commonly used in liquid detergent compositions, for example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, ethylene glycol dimethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, polyethylene glycol monomethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, dipropylene glycol monomethyl ether, dipropylene glycol dimethyl ether, tripropylene glycol monomethyl ether, 3-methyl-3-methoxybutanol, etc. The glycol ether solvent may be a single component or a combination of two or more. In particular, triethylene glycol dimethyl ether and diethylene glycol monobutyl ether are preferred in terms of balance with other components, storage stability, and cleaning performance.

[0025] Glycol ether solvents can be incorporated into the composition of the present invention in a proportion of 1 to 15% by mass, preferably 2 to 10% by mass, more preferably 3 to 10% by mass, and particularly preferably 5 to 10% by mass. If the proportion is less than 1% by mass, the cleaning performance against various oil stains and storage stability may not be sufficient, while if it exceeds 15% by mass, the balance with other components may be disrupted and the desired effect may not be obtained.

[0026] (f) water Examples of "water" used in this invention include tap water, soft water, hard water, pure water, distilled water, and deionized water. These may be used individually or in combination of two or more. Among these, tap water and deionized water are preferred from the viewpoint of economy and storage stability.

[0027] Furthermore, the "water" in the composition of the present invention is the sum of the water contained in the form of crystalline water or aqueous solution derived from each component of the composition of the present invention, and the water added from the outside, and is blended in a balanced manner so that the entire composition, including optional components, amounts to 100% by mass.

[0028] In addition to the above components (a) to (f), the alkaline cleaning agent composition of the present invention may appropriately contain any components such as metal ion chelating agents, pH adjusters (organic acids such as citric acid), pigments, fragrances, dyes, disinfectants, enzymes, surfactants, cleaning builders, viscosity modifiers (thickening agents, thickening agents), metal corrosion inhibitors, and antioxidants, as long as they do not affect the desired performance.

[0029] The alkaline cleaning agent composition of the present invention can generally be manufactured by stirring and mixing the components if they are liquids, or by first dissolving them in water and then adding the other liquid components and stirring and mixing them if they contain solid components. The manufacturing procedure is not particularly limited, and the order of addition of each component, the order of dissolution, and (if necessary) the heating / cooling can be appropriately selected and adjusted according to the composition of the composition.

[0030] The alkaline cleaning agent composition of the present invention may be used after being appropriately diluted to, for example, 2 to 200 times, 3 to 150 times, 5 to 100 times, etc., as long as it can clean the object to be cleaned. Dilution can be done using water.

[0031] The cleaning of an object to be cleaned using the alkaline cleaning agent composition of the present invention can be carried out by the following method. (1) The alkaline cleaning agent composition of the present invention can be impregnated into wipes, nonwoven fabrics, sponges, mops, brushes, etc. to create a cleaning material, and cleaning can be performed by wiping or scrubbing the object to be cleaned with these. Examples of objects to be cleaned include hard surfaces to which one or more stains selected from the group consisting of altered and / or stubborn oil stains, burnt-on stains, and sticky oil stains are attached. Examples include hard surfaces such as countertops, cooking utensils, tableware, floors, walls, tiles, glass, and ventilation fan walls in food factories, cafes, restaurants, hotels, bars, schools (school lunches), hospitals, nursing homes, central kitchens, and supermarket backyards. Furthermore, the alkaline cleaning agent composition of the present invention can also be used on hard surfaces to which stains other than those mentioned above are attached, and can be used to clean such stains.

[0032] (2) The alkaline cleaning agent composition of the present invention can be used by any other appropriate method. For example, it can be sprayed onto the surface of the object to be cleaned using a sprayer, left immediately or after a predetermined time, for approximately 1 to 10 minutes, rinsed with water as appropriate, and then dried. Specifically, a dedicated dispenser filled with the alkaline cleaning agent composition of the present invention can be used, dispensing approximately 6 to 12 mL / m² each time it is used. 2 This can be done by spraying the cleaning solution onto the surface of the object to be cleaned at a specific ratio. The items to be cleaned include those listed above.

[0033] The alkaline cleaning agent composition of the present invention is provided filled in plastic containers, pump-equipped containers, pouches, tubes, etc. It can also be individually packaged in amounts suitable for single-use, making it portable. [Examples]

[0034] The present invention will be described in detail below with reference to examples and comparative examples of the alkaline cleaning agent composition of the present invention. However, the present invention is not limited to these examples.

[0035] Alkaline detergent compositions for Examples 1-5 and Comparative Examples 1-5 were prepared using the compositions shown in Tables 1-1 and 1-2 below, and their cleaning power and storage stability were evaluated using the test methods and evaluation criteria described below. In the tables, the amounts of each component are shown in mass%, calculated to 100% effective purity, with the resulting composition amount being 100% by mass.

[0036] [Cleaning power] <Stubborn grease stains> (Test method) (1) A stainless steel plate (26mm x 76mm) was evenly coated with yakiniku sauce containing 30% beef fat, heated to 180°C, and then cooled to room temperature to be used as a test piece. (2) The test piece was immersed in approximately 2 mL of alkaline cleaning agent composition for 10 minutes, then removed, rinsed with water for 15 seconds, and dried. (3) After drying, the cleanability was determined by visually inspecting the degree of remaining dirt before and after washing. (Evaluation Criteria) The cleaning performance was determined as follows based on the degree of remaining dirt as visually inspected. ◎: Visual inspection of remaining dirt is less than 30% ○: The degree of remaining dirt as seen by the eye is 30% or more but less than 50%. ×: Visual inspection of remaining dirt is 50% or more.

[0037] <Sticky, greasy stains> (Test method) (1) A stainless steel plate (26 mm x 76 mm) was evenly coated with soybean oil, left to stand at room temperature to dry, and used as a test piece. (2) The test piece was immersed in approximately 2 mL of alkaline cleaning agent composition for 10 minutes, then removed, rinsed with water for 15 seconds, and dried. (3) After drying, the cleanability was determined by visually inspecting the degree of remaining dirt before and after washing. (Evaluation Criteria) The cleaning performance was determined as follows based on the degree of remaining dirt as visually inspected. ◎: The percentage of remaining dirt as seen by the naked eye is less than 25%. ○: The percentage of remaining dirt as seen by the eye is between 25% and less than 50%. ×: Visual inspection of remaining dirt is 50% or more.

[0038] <Storage Stability> The prepared alkaline cleaning agent composition was stored at 50°C, and the presence or absence of changes in state such as separation, precipitation, and gelation was visually confirmed. (Evaluation Criteria) ◎: No changes in state such as separation, precipitation, or gelation occurred for more than two weeks. ○: No changes in state such as separation, precipitation, or gelation occurred for more than one week but less than two weeks. ×: Changes in state such as separation, precipitation, or gelation occurred within one week.

[0039] 〔component〕 The ingredients used in Tables 1-1, 1-2, 2-1, and 2-2 below are as follows. [(a) component] Sodium hydroxide • Potassium hydroxide

[0040] [(b) Component] Sodium xylene sulfonate Sodium cumenesulfonate

[0041] [(c) component] • Alkylbenzenesulfonates: Sodium linear alkylbenzenesulfonate • Alkyl ether sulfate: Sodium polyoxyethylene lauryl ether sulfate (ethylene oxide 3 molar adduct)

[0042] [(d) component] • Alkyl glucosides: C8-10 alkyl polyglucosides • Alkylglucamide: C12-14 alkylglucamide

[0043] [(e) component] • Diethylene glycol monobutyl ether Triethylene glycol dimethyl ether Glycerin Propylene glycol

[0044] [(f) component] • Water: Ion-exchanged water

[0045] [Table 1-1]

[0046] [Table 1-2]

[0047] From the results above, it was confirmed that Examples 1 to 5 have excellent cleaning power against both stubborn oil stains with modified oil and sticky oil stains, and also possess excellent storage stability.

[0048] On the other hand, Comparative Example 1 is an example where Example 1 is diluted four times, and the total amount of components (b) and (d) is low at 0.7% by mass. Unlike the example, it was confirmed that sufficient cleaning power could not be obtained against stubborn oil stains caused by modified oil.

[0049] Comparative Example 2 is an example where component (b) benzenesulfonate is not included, and unlike the Examples, it was confirmed that sufficient storage stability could not be obtained.

[0050] Comparative Example 3 is an example where the anionic surfactant of component (c) is not included. Unlike the Examples, it was confirmed that sufficient cleaning power could not be obtained against any type of oil stain, nor was sufficient storage stability achieved.

[0051] Comparative Example 4 is an example where the nonionic surfactant component (d) is not included. The total amount of components (b) and (d) is low at 0.5% by mass, and the mass ratio of {(a)+(c)} / {(b)+(d)} is high at 21.8. Unlike the examples, it was confirmed that sufficient cleaning power against stubborn oil stains of modified oil could not be obtained, nor was sufficient storage stability.

[0052] Comparative Example 5 is an example in which the glycol ether-based solvent of component (e) is not included. Unlike the examples, it was confirmed that sufficient cleaning power was not obtained against stubborn oil stains of modified oil, and that sufficient storage stability was also not obtained.

[0053] Alkaline detergent compositions for Examples 6-11 and Comparative Examples 6-12 were prepared using the compositions shown in Tables 2-1 and 2-2 below, and comparative examples 6-12 were prepared using the compositions shown in Tables 3-1 and 3-2 below. Their cleaning power and storage stability were evaluated using the test methods and evaluation criteria described above. In the tables, the amounts of each component are shown in mass%, calculated to 100% effective purity, with the resulting composition amount being 100% by mass.

[0054] [Table 2-1]

[0055] [Table 2-2]

[0056] [Table 3-1]

[0057] [Table 3-2]

[0058] From the results above, it was confirmed that Examples 6-11 have excellent cleaning power against both stubborn oil stains with modified oil and sticky oil stains, and also possess excellent storage stability.

[0059] On the other hand, Comparative Example 6 is an example in which the sodium hydroxide and potassium hydroxide components (a) are not included, and unlike the Examples, it was confirmed that sufficient cleaning power could not be obtained against stubborn oil stains caused by modified oil.

[0060] Comparative Example 7 had a high amount of sodium hydroxide and potassium hydroxide in component (a) at 30% by mass, and unlike the examples, it was confirmed that sufficient storage stability could not be obtained.

[0061] Comparative Example 8 had a low mass ratio of {(a)+(c)} / {(b)+(d)} of 0.8, and unlike the Examples, it was confirmed that sufficient cleaning power could not be obtained against stubborn oil stains caused by modified oil.

[0062] Comparative Example 9 had a low total amount of components (a) and (c) at 1.5% by mass, and unlike the Examples, it was confirmed that sufficient cleaning power could not be obtained against any type of oil stain.

[0063] Comparative Example 10 had a high amount of anionic surfactant in component (c) at 32% by mass, and a high total amount of components (a) and (c) at 39% by mass. Unlike the examples, it was confirmed that sufficient storage stability could not be obtained.

[0064] Comparative Example 11 is an example where the glycol ether solvent of component (e) is not included (glycerin was used), and unlike the examples, it was confirmed that sufficient storage stability could not be obtained.

[0065] Comparative Example 12 is an example where the glycol ether solvent of component (e) is not included (propylene glycol was used), and unlike the examples, it was confirmed that sufficient storage stability could not be obtained.

[0066] Based on the above results, it was confirmed that the alkaline cleaning agent composition containing the combination of components (a) to (e) as active ingredients exhibits excellent properties in terms of cleaning power against both modified oil-based and sticky oil stains, as well as storage stability.

Claims

1. Alkaline cleaning agent composition containing the following components (a) to (f): (a) Sodium hydroxide and / or potassium hydroxide, (b) One or more benzenesulfonic acids or salts thereof that are substituted with 1 to 3 alkyl groups having 1 to 3 carbon atoms, (c) Anionic surfactant, (d) Nonionic surfactant selected from compounds represented by the following general formulas (1) and (2) R1-O-(G1)n...(1) (In the formula, R1 represents an alkyl group having 6 to 16 carbon atoms, G1 represents a sugar residue having 5 to 6 carbon atoms, and n represents the number of average condensation degrees from 1 to 3.) R2a-CO-NR2b-(G2)n...(2) (In formula (2), R2a represents an alkyl group having 7 to 17 carbon atoms, or an alkenyl group; R2b represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a hydroxyalkyl group having 1 to 4 carbon atoms; G2 represents a sugar residue having 5 to 6 carbon atoms; and n represents the number of average condensation degrees 1 to 3.) (e) 1 to 15% by mass of a glycol ether solvent, (f) water; In the above composition, component (a) is present in an amount of 2 to 10% by mass, The aforementioned component (b) is in an amount of 0.1 to 2% by mass, The aforementioned component (c) is in an amount of 1 to 15% by mass, The aforementioned component (d) is in an amount of 1.4 to 5% by mass, The total amount of components (a) and (c) is 5.6 to 25% by mass, the total amount of components (b) and (d) is 1.6 to 7% by mass, and the mass ratio of {(a) + (c)} / {(b) + (d)} is 1.9 to 6.

3.

2. The alkaline cleaning agent composition according to claim 1, wherein the benzenesulfonic acid or salt thereof described in (b) above is one or more selected from the group consisting of cumenesulfonic acid, xylenesulfonic acid, toluenesulfonic acid, and alkali metal salts thereof.

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