Corrosion-reducing cleaning agent composition

Abstract

To provide a detergent composition for reducing the corrosion of a hard surface including a metal surface of aluminum and / or anodized aluminum, the composition designed to reduce the corrosion of the metal surface of aluminum and / or anodized aluminum due to washing; a method for reducing the corrosion of a metal surface of aluminum and / or aluminum alloys; and a method for reducing the corrosion of a metal surface of aluminum and / or anodized aluminum due to (a) component.SOLUTION: A detergent composition for reducing the corrosion of a hard surface including a metal surface of aluminum and / or anodized aluminum, comprises (a) an aminocarboxylic acid type chelator, (b) at least one selected from lactic acid, malic acid, tartaric acid, citric acid, and salts thereof, and water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cleaning agent composition for reducing corrosion of hard surfaces, including aluminum and / or anodized metal surfaces. [Background technology]

[0002] Dirt adhering to hard surfaces of food processing equipment and other facilities accumulates as extremely difficult-to-remove grime because hardness components such as calcium bind to the dirt. Because such grime is so difficult to remove, chelating agents are commonly used in cleaning agents to eliminate it. Aminocarboxylic acid-based chelating agents, in particular, are widely used due to their very high chelating ability.

[0003] Patent documents 1 and 2 describe aqueous compositions containing aminocarboxylic acid-type chelating agents and describe a technique using sodium metasilicate pentahydrate for aluminum corrosion prevention. Patent document 3 describes a technique for tungsten corrosion inhibitors. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Special Publication No. 2011-516655 [Patent Document 2] Special Publication No. 2011-516656 [Patent Document 3] Japanese Patent Publication No. 2016-127291 [Overview of the project] [Problems that the invention aims to solve]

[0005] Many parts made of aluminum or anodized aluminum are used in various equipment such as food processing machines, but these parts are prone to corrosion, and the inventors have discovered that the corrosion of aluminum metal is accelerated, especially when using cleaning agent compositions containing aminocarboxylic acid type chelating agents. Cleaning agents using silicates have long been proposed as a method to prevent such corrosion. However, when cleaning agents containing silicates are used, poorly soluble scale derived from the silicates adheres to and accumulates on the object, causing a whitening phenomenon and significantly impairing its appearance. Therefore, there is a need for a technology that reduces aluminum corrosion in a detergent composition containing an aminocarboxylic acid-type chelating agent without using silicates. Furthermore, while Patent Documents 1 and 2 describe aqueous compositions containing an aminocarboxylic acid-type chelating agent and sodium metasilicate pentahydrate, they do not suggest that a corrosion reduction effect on aluminum can be obtained by using an aminocarboxylic acid-type chelating agent in combination with a specific organic acid. Also, while Patent Document 3 describes a tungsten corrosion inhibitor technology, it does not suggest that a corrosion reduction effect on aluminum can be obtained by using an aminocarboxylic acid-type chelating agent in combination with a specific organic acid.

[0006] The present invention provides a cleaning agent composition for reducing corrosion of hard surfaces, including aluminum and / or anodized metal surfaces, which reduces corrosion of aluminum and / or anodized metal surfaces due to cleaning; a method for reducing corrosion of aluminum and / or anodized metal surfaces; and a method for reducing corrosion of aluminum and / or anodized metal surfaces by component (a). [Means for solving the problem]

[0007] The present invention relates to a cleaning agent composition for reducing corrosion on hard surfaces, including aluminum and / or anodized aluminum metal surfaces, comprising (a) an aminocarboxylic acid type chelating agent [hereinafter referred to as component (a)], (b) one or more selected from lactic acid, malic acid, tartaric acid, citric acid, and salts thereof [hereinafter referred to as component (b)], and water.

[0008] The present invention also relates to a method for reducing corrosion of a hard surface including a metal surface of aluminum and / or alumite of the present invention, by contacting a cleaning agent composition for reducing corrosion of the hard surface including the metal surface of aluminum and / or alumite with the hard surface and cleaning it.

[0009] The present invention also relates to a method for reducing corrosion of a metal surface of aluminum and / or alumite caused by the component (a), by adding the component (b) to a cleaning agent composition containing the component (a) and water.

[0010] Hereinafter, the cleaning agent composition for reducing corrosion of a hard surface including a metal surface of aluminum and / or alumite of the present invention is also simply referred to as a cleaning agent composition for reducing aluminum corrosion. Also, the method for reducing corrosion of a metal surface of aluminum and / or alumite of the present invention is also simply referred to as a method for reducing aluminum corrosion.

Effects of the Invention

[0011] According to the present invention, there are provided a cleaning agent composition for reducing corrosion of a hard surface including a metal surface of aluminum and / or alumite, which reduces corrosion of the metal surface of aluminum and / or alumite by cleaning, a method for reducing corrosion of the metal surface of aluminum and / or alumite, and a method for reducing corrosion of the metal surface of aluminum and / or alumite caused by the component (a).

Modes for Carrying Out the Invention

[0012] 〔Cleaning Agent Composition for Reducing Aluminum Corrosion〕 The reason why the cleaning agent composition for reducing aluminum corrosion of the present invention reduces corrosion of a metal surface of aluminum and / or alumite by cleaning is not necessarily clear, but is presumed as follows. When the aluminum corrosion reducing cleaning agent composition of the present invention is brought into contact with an aluminum and / or anodized metal surface, it is presumed that a specific organic acid, which is component (b) of the present invention, forms a complex on the aluminum and / or anodized metal surface, and this complex creates a protective film on the aluminum and / or anodized surface, preventing corrosion by chemicals such as component (a). Furthermore, the aluminum corrosion reducing cleaning agent composition of the present invention contains a specific surfactant, alkanolamine, which is component (c). It is presumed that component (c) creates a stronger protective film on the metal surface of aluminum and / or anodized aluminum, thereby better preventing corrosion caused by chemicals such as component (a).

[0013] <(a) Components> The aluminum corrosion reducing cleaning agent composition of the present invention contains an aminocarboxylic acid type chelating agent as component (a). (a) The components include one or more selected from ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), iminodiacetic acid, diethylenetriaminepentaacetic acid (DTPA), N-hydroxyethyl-ethylenediaminetriacetic acid (HEDTA), methylglycinediacetic acid (MGDA), dihydroxyethylglycine (DHEG), hydroxyethyleneiminodiacetic acid (HIDA), aspartic acid diacetic acid (ASDA), glutamic acid diacetic acid (GLDA), and salts thereof. (a) From the viewpoint of calcium scale cleaning, component (a) is preferably one or more selected from ethylenediaminetetraacetic acid, nitrilotriacetic acid, diethylenetriaminepentaacetic acid, methylglycinediacetic acid and salts thereof, and more preferably ethylenediaminetetraacetic acid or a salt thereof. (a) Examples of salts of component (a) include alkali metal salts, ammonium salts, and amine salts. Preferably, it is an alkali metal salt, and more preferably, a sodium salt or potassium salt.

[0014] <(b) Component> The aluminum corrosion reducing cleaning agent composition of the present invention contains, as component (b), one or more selected from lactic acid, malic acid, tartaric acid, citric acid, and salts thereof. The aluminum corrosion reducing cleaning agent composition of the present invention contains components (a) and (b), so that component (a) can remove very difficult-to-remove dirt containing hardness components that adheres to hard surfaces, while component (b) can reduce the corrosion of the aluminum and / or anodized metal surface caused by component (a).

[0015] (b) Component is preferably one or more selected from lactic acid, malic acid, tartaric acid, citric acid and salts thereof, from the viewpoint of preventing corrosion of the aluminum and / or anodized metal surface, and more preferably malic acid, tartaric acid, citric acid or a salt thereof. (b) The salt of component (b) can be an alkali metal salt, an ammonium salt, an amine salt, etc. Preferably, it is an alkali metal salt, and more preferably a sodium salt or a potassium salt.

[0016] <Composition, etc.> The aluminum corrosion reducing cleaning agent composition of the present invention contains component (a) in an amount that is preferably 0.05% by mass or more, preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, and preferably 15.0% by mass or less, more preferably 12.0% by mass or less, even more preferably 10.0% by mass or less, even more preferably 9.0% by mass or less, even more preferably 8.0% by mass or less, even more preferably 5.0% by mass or less, even more preferably 3.0% by mass or less, and even more preferably 2.0% by mass or less, from the viewpoint of cleaning calcium scale. In this invention, the mass of component (a) shall be determined by converting it to the value of the sodium salt.

[0017] The aluminum corrosion reducing cleaning agent composition of the present invention contains component (b) in an amount preferably 0.1% by mass or more, more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, and preferably 10% by mass or less, more preferably 5% 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 preventing corrosion of the metal surface of aluminum and / or anodized aluminum. In this invention, the mass of component (b) shall be determined by the value obtained in terms of acid.

[0018] In the aluminum corrosion reducing cleaning agent composition of the present invention, the mass ratio (a) / (b) of the content of component (a) to the content of component (b) is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.5 or more, even more preferably 0.8 or more, and preferably 10 or less, more preferably 7 or less, even more preferably 5 or less, even more preferably 3 or less, even more preferably 2 or less, and even more preferably 1.3 or less.

[0019] The aluminum corrosion reducing cleaning agent composition of the present invention preferably further contains, from the viewpoint of further enhancing corrosion protection of the metal surface of aluminum and / or anodized aluminum by using components (a) and (b) in combination, one or more selected from (c1) a polyoxyalkylene alkyl or alkenylamine having an alkyl or alkenyl group with 8 to 18 carbon atoms and an average number of added moles of oxyalkylene groups of 20 or less [hereinafter referred to as component (c1)], (c2) a quaternary ammonium salt type cationic surfactant [hereinafter referred to as component (c2)], and (c3) an alkanolamine [hereinafter referred to as component (c3)] as component (c3).

[0020] The (c1) component is preferably a compound represented by the following general formula (c1).

[0021] [ka]

[0022] [In the formula, R 1c R is an alkyl group or alkenyl group having 8 to 18 carbon atoms, 2c O is an alkylene oxy group having 2 or 3 carbon atoms, and m and n are R 2c This is the average number of moles of O added, where m+n is a number less than or equal to 20.

[0023] In formula (c1), R 1c From the viewpoint of corrosion prevention of the metal surface of aluminum and / or anodized aluminum, the alkyl or alkenyl group has 8 or more carbon atoms, preferably 10 or more, and 18 or fewer carbon atoms, preferably 16 or fewer, more preferably 14 or fewer carbon atoms, and is preferably an alkyl group. In formula (c1), R 2c O is an alkylene oxy group having 2 or 3 carbon atoms, preferably an ethylene oxy group. In formula (c1), m+n is a number that is 20 or less, preferably 7 or less, more preferably 5 or less, even more preferably 3 or less, and 0 or more, preferably 1 or more, from the viewpoint of corrosion prevention of the aluminum and / or anodized metal surface.

[0024] (c2) Examples of quaternary ammonium salt type cationic surfactants include those in which one or two of the groups bonded to the nitrogen atom are hydrocarbon groups having 8 or more carbon atoms, preferably 10 or more, and 18 or less, preferably 16 or less, more preferably 14 or less, preferably alkyl groups, and the remaining group is selected from the group consisting of alkyl groups having 1 to 3 carbon atoms, hydroxyalkyl groups having 1 to 3 carbon atoms, and arylalkyl groups (such as benzyl groups), preferably selected from the group consisting of methyl groups, ethyl groups, and benzyl groups. Among these, quaternary ammonium salt type cationic surfactants having a benzyl group are preferred from the viewpoint of corrosion prevention of aluminum and / or anodized metal surfaces.

[0025] The (c2) component is preferably a compound represented by the general formula (c2).

[0026] [ka]

[0027] [In the formula, R 3c represents a hydrocarbon group having 8 or more and 18 or less carbon atoms. R 4c , R 5c each independently represents an alkyl group having 1 or more and 3 or less carbon atoms. R 6c represents an alkylene group having 1 or more and 3 or less carbon atoms. Z - represents an anion. ]

[0028] In general formula (c2), R 3c is preferably a hydrocarbon group having 8 or more, more preferably 10 or more, and preferably 18 or less, more preferably 16 or less, still more preferably 14 or less carbon atoms, preferably an alkyl group or an alkenyl group, more preferably an alkyl group, from the viewpoint of corrosion prevention of the metal surface of aluminum and / or alumite. In general formula (c2), R 4c , R 5c are each independently an alkyl group having 1 or more and 3 or less carbon atoms, preferably an alkyl group having 1 or more and 2 or less carbon atoms, and more preferably a methyl group. In general formula (c2), R 6c is an alkylene group having 1 or more and 3 or less carbon atoms, preferably an alkylene group having 1 or more and 2 or less carbon atoms, and more preferably a methylene group. As Z - in general formula (c2), halogen ions such as chloride ions are preferable. As Z - , chloride ion (Cl - ) is more preferable.

[0029] Examples of the component (c3) include an alkyl mono- or di-alkanolamine in which the carbon number of the alkanol group is 2 or 3 or an alkylene oxide adduct thereof (the carbon number of the alkylene oxide is 2 or 3), and specific examples include one or more compounds selected from monoethanolamine, diethanolamine, triethanolamine, 1-amino-2-propanol, N-methylmonoethanolamine, N-methyldiethanolamine, and N,N-dimethylmonoethanolamine. (c3) Component is preferably one or more selected from monoethanolamine, diethanolamine, and triethanolamine, more preferably one or more selected from diethanolamine and triethanolamine, and even more preferably triethanolamine, from the viewpoint of preventing corrosion of the aluminum and / or anodized metal surface.

[0030] The aluminum corrosion reducing cleaning agent composition of the present invention, when it contains component (c), contains component (c) in an amount of preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, and preferably 20% by mass or less, more preferably 10% by mass or less, even more preferably 8% by mass or less, even more preferably 6% by mass or less, even more preferably 4% 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 preventing corrosion of the metal surface of aluminum and / or anodized aluminum. In the present invention, if component (c) contains component (c2), the mass of component (c2) shall be determined assuming that chlorine ions are counterions.

[0031] In the aluminum corrosion reducing cleaning agent composition of the present invention, if component (c) is included, the mass ratio (a) / (c) of the content of component (a) to the content of component (c) is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.5 or more, and preferably 5 or less, more preferably 3 or less, even more preferably 2 or less, and even more preferably 1.5 or less, from the viewpoint of preventing corrosion of the metal surface of aluminum and / or anodized aluminum.

[0032] The aluminum corrosion-reducing cleaning agent composition of the present invention can reduce corrosion of the metal surface of aluminum and / or anodized aluminum by component (a) even without containing silicates. This prevents poorly soluble scale derived from silicates from adhering to and accumulating on hard surfaces, causing whitening and significantly impairing the appearance. Examples of silicates include one or more selected from sodium orthosilicate, sodium metasilicate, sodium sesquisilicate, sodium silicate No. 1, sodium silicate No. 2, and sodium silicate No. 3.

[0033] In the aluminum corrosion reducing cleaning agent composition of the present invention, the silicate content is preferably 0.5% by mass or less, more preferably 0.2% by mass or less, and even more preferably 0.1% by mass or less, from the viewpoint of suppressing silicate scale adhesion. Furthermore, it is preferable that the aluminum corrosion reducing cleaning agent composition of the present invention does not contain silicates.

[0034] The aluminum corrosion reducing cleaning agent composition of the present invention may optionally contain surfactants other than component (c), water-soluble organic solvents, fragrances, dyes, preservatives, antioxidants, defoamers, stabilizers, organic acids and their salts other than component (b), pH adjusters, etc., as long as the effects of the present invention are not impaired (except for components (a) to (c) above).

[0035] The aluminum corrosion reducing cleaning agent composition of the present invention contains water. That is, the remainder other than the components (a) to (c) and any optional components is water. The aluminum corrosion reducing cleaning agent composition of the present invention contains water preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and preferably 98% by mass or less, more preferably 95% by mass or less. It is preferable to use ion-exchanged water, sterilized ion-exchanged water, etc.

[0036] The aluminum corrosion reducing cleaning agent composition of the present invention has a pH (glass electrode method) at 25°C that is preferably 4 or higher, more preferably 5 or higher, even more preferably 6 or higher, and preferably 10 or lower, more preferably 9 or lower, and even more preferably 8 or lower, from the viewpoint of preventing corrosion of aluminum and / or anodized metal surfaces. This pH may be the pH used when cleaning hard surfaces.

[0037] The aluminum corrosion reducing cleaning agent composition of the present invention is preferably for use on hard surfaces of hard articles, and more preferably for use on hard surfaces of food processing equipment and / or cooking equipment. These hard surfaces include aluminum and / or anodized metal surfaces.

[0038] "Food processing equipment and / or cooking equipment" means the machines and equipment used in a food processing plant when processing and / or cooking food. Examples of such equipment include pipes, parts, net conveyors, freezers, slicers, rice milling machines, and other food manufacturing or cooking equipment. Examples of such facilities include floors, walls, and workbenches. Specifically, the aluminum corrosion-reducing cleaning agent composition of the present invention is preferably a cleaning agent for application to hard surfaces of hard articles, and more preferably a cleaning agent for application to hard surfaces of food processing equipment or cooking equipment. More specifically, the aluminum corrosion reducing cleaning agent composition of the present invention is preferably a cleaning agent for spraying onto hard surfaces of hard articles, and more preferably a cleaning agent for spraying onto hard surfaces of food processing equipment or cooking equipment.

[0039] Hard materials include pipes, parts, and other components of food processing equipment, as well as hard materials used around the kitchen. Specifically, hard materials used around the kitchen include: (1) Refrigerators, cupboards, and other storage places for food, dishes, and cooking utensils, (2) Drains, countertops, range hoods, sinks, gas ranges, microwave ovens and other food preparation areas, (3) The surrounding floor and walls, etc. In this invention, these are referred to as "hard articles for kitchen use" for convenience.

[0040] The hard surfaces to be cleaned in this invention, and the hard surfaces of food processing equipment and / or cooking equipment, include aluminum and / or anodized metal surfaces. Other hard surface materials include plastics (including silicone resin, etc.), metals (excluding aluminum and anodized aluminum), ceramics, wood, and combinations thereof.

[0041] [Methods for reducing aluminum corrosion] The present invention provides a method for reducing corrosion on metal surfaces of aluminum and / or anodized aluminum (hereinafter also referred to as the aluminum corrosion reduction method), which involves cleaning a hard surface, including an aluminum and / or anodized aluminum metal surface, by bringing the aluminum corrosion reduction cleaning agent composition of the present invention into contact with the hard surface.

[0042] The aluminum corrosion reduction method of the present invention involves cleaning a hard surface, including an aluminum and / or anodized metal surface, by bringing the aluminum corrosion reduction cleaning agent composition of the present invention into contact with the hard surface. Component (a) can remove very difficult-to-remove dirt containing hardness components attached to the hard surface, and component (b) can reduce corrosion of the aluminum and / or anodized metal surface. This method is suitable for cleaning hard surfaces, including aluminum and / or anodized metal surfaces. The aluminum corrosion reduction method will be described below.

[0043] In the aluminum corrosion reduction method of the present invention, the aluminum corrosion reduction cleaning agent composition of the present invention is brought into contact with a hard surface including an aluminum and / or anodized metal surface. The aluminum corrosion reduction method of the present invention can be appropriately applied to the embodiments described in the aluminum corrosion reduction cleaning agent composition of the present invention.

[0044] In the present invention, a concentrated composition containing component (a), component (b), and optionally component (c) may be prepared, and this concentrated composition may be diluted with water to prepare the aluminum corrosion reducing cleaning agent composition of the present invention, which may then be brought into contact with a hard surface including the metal surface of aluminum and / or anodized aluminum. That is, an aluminum corrosion reducing method may also be used in which a concentrated composition containing component (a), component (b), and optionally component (c) of the present invention is diluted with water to prepare the aluminum corrosion reducing cleaning agent composition of the present invention, and this cleaning agent composition is brought into contact with the metal surface of aluminum and / or anodized aluminum, which may then be brought into contact with a hard surface, without dilution.

[0045] When dealing with highly soiled surfaces, the aluminum corrosion-reducing cleaning agent composition can be applied directly to the surface. When dealing with less soiled surfaces, the aluminum corrosion-reducing cleaning agent composition can be further diluted with water before use. When the aluminum corrosion-reducing cleaning agent composition is diluted with water, the concentration of component (a) in the diluted solution is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and preferably 2.0% by mass or less, and more preferably 1.0% by mass or less. This diluted solution is also the aluminum corrosion-reducing cleaning agent composition of the present invention.

[0046] Furthermore, the aluminum corrosion reduction method of the present invention includes a cleaning method in which the aluminum corrosion reduction cleaning agent composition is brought into contact with a hard surface to which dirt is attached, and then left to stand without applying any external force such as mechanical force. In the present invention, since component (a) can remove very difficult-to-remove dirt containing hardness components, a high cleaning effect can be obtained even if it is brought into contact without using flexible materials such as sponges or fingers, and left to stand without applying any external force such as mechanical force. This makes it suitable for cleaning parts that cannot be reached by hands or tools, or for cleaning hard-to-reach details. Leaving a surface unattended without applying external forces such as mechanical force means, for example, not performing any intentional cleaning operations other than contact with the composition. For instance, allowing the contacted composition to naturally flow down a hard surface, or transmitting unintended vibrations to the hard surface, can be understood as leaving the surface unattended without applying external forces. After letting it sit, rinse it with water. When rinsing, you can apply external force (physical force) with your hands or simply rinse it with a stream of water.

[0047] In the aluminum corrosion reduction method of the present invention, the aluminum corrosion reduction cleaning agent composition is applied to a hard surface area of ​​100 cm². 2 It is preferable to contact the material in a ratio of preferably 0.01g or more, more preferably 0.05g or more, even more preferably 0.1g or more, and preferably 5g or less, more preferably 3g or less, and even more preferably 2g or less, and further preferably to apply or spray it.

[0048] In the aluminum corrosion reduction method of the present invention, from the viewpoint of enhancing the cleaning effect, the aluminum corrosion reduction cleaning agent composition is brought into contact with a hard surface and left for preferably 10 seconds or more, more preferably 20 seconds or more, even more preferably 30 seconds or more, and even more preferably 40 seconds or more. Similarly, from the viewpoint of enhancing the cleaning effect, it is preferably 60 minutes or less, more preferably 30 minutes or less, even more preferably 20 minutes or less, and even more preferably 10 minutes or less. In this case, the time when the composition first comes into contact with the hard surface may be considered the start of the leaving period. The temperature at which the product is left to stand is room temperature, for example, between 10°C and 30°C.

[0049] Furthermore, in the aluminum corrosion reduction method of the present invention, from the viewpoint of enhancing the cleaning effect, the aluminum corrosion reduction cleaning agent composition is brought into contact with the hard surface to be cleaned for preferably 10 seconds or more, more preferably 20 seconds or more, even more preferably 30 seconds or more, and even more preferably 40 seconds or more, and from the same viewpoint, preferably 60 minutes or less, more preferably 30 minutes or less, even more preferably 20 minutes or less, and even more preferably 10 minutes or less.

[0050] In the aluminum corrosion reduction method of the present invention, the aluminum corrosion reduction cleaning agent composition may be brought into contact with a hard surface to which dirt has adhered by immersion in the composition, or, from the viewpoint of efficiently enhancing the cleaning effect, it may be sprayed or applied and brought into contact with a hard surface to which dirt has adhered. The method for bringing the aluminum corrosion-reducing cleaning agent composition into contact with a hard surface to which dirt is attached is preferably by spraying or coating, and examples include spraying in droplet form or coating in foam form. Specifically, a spray means can be used. That is, it is preferable to use a cleaning agent article for reducing corrosion on hard surfaces including aluminum and / or anodized metal surfaces (hereinafter also simply referred to as an aluminum corrosion-reducing cleaning agent article), which is made by filling the aluminum corrosion-reducing cleaning agent composition of the present invention into a container equipped with a sprayer. The present invention provides an aluminum corrosion-reducing cleaning agent article in a spray container, which is made by filling the aluminum corrosion-reducing cleaning agent composition of the present invention into a container equipped with a sprayer.

[0051] The container equipped with a sprayer for filling the aluminum corrosion reducing cleaning agent composition of the present invention in the spray container-packaged aluminum corrosion reducing cleaning agent article of the present invention includes manual spraying devices that do not use propellants, such as trigger-type spray containers and pump-type spray containers, and aerosols that use propellants. The container equipped with the sprayer is preferably a trigger-type spray that can spray or apply the contents in droplet or foam form, and more preferably a trigger-type spray equipped with a mechanism for spraying the contents in droplet form or a trigger-type spray equipped with a mechanism for forming foam (foam-forming mechanism).

[0052] In the aluminum corrosion reducing cleaning agent article in a spray container of the present invention, when a trigger-type spray equipped with a mechanism for spraying the aluminum corrosion reducing cleaning agent composition of the present invention in droplet form is used, the nozzle diameter of the spray nozzle of the spray container containing the composition is preferably in the range of 0.1 mm or more, more preferably 0.3 mm or more, preferably 2 mm or less, and more preferably 1 mm or less, in order to ensure ease of spraying, that the sprayed droplets are not rough, that the spray is not linear, and that the sprayable area does not become extremely narrow. When using a trigger-type spray equipped with a mechanism for spraying in droplet form, the cleaning agent article for hard surfaces in a spray container of the present invention sprays, preferably 0.1 mL or more, more preferably 0.3 mL or more, and preferably 5 mL or less, and more preferably 2 mL or less of the composition in a single operation.

[0053] When using a trigger-type spray equipped with a foam-forming mechanism, the aluminum corrosion-reducing cleaning agent article in the spray container of the present invention sprays a composition of preferably 0.5 mL or more, more preferably 1 mL or more, preferably 30 mL or less, more preferably 15 mL or less, and even more preferably 5 mL or less in a single operation.

[0054] The aluminum corrosion reduction method of the present invention is preferred as a cleaning method for hard surfaces of hard articles, and further preferred as a cleaning method for hard surfaces of food processing equipment and / or cooking equipment. It is also preferred as a hand-washing method for hard surfaces of hard articles, and further preferred as a hand-washing method for hard surfaces of food processing equipment and / or cooking equipment.

[0055] The aluminum corrosion reduction method of the present invention targets hard surfaces of hard articles, preferably hard surfaces of food processing equipment and / or cooking equipment. These hard surfaces include aluminum and / or anodized metal surfaces. Examples of hard articles and food processing equipment and / or cooking equipment include those mentioned above. The hard surface material targeted by the aluminum corrosion reduction method of the present invention includes aluminum and / or anodized metal surfaces, and other hard surface materials include plastics (including silicone resins, etc.), metals (excluding aluminum and anodized aluminum), ceramics, wood, and combinations thereof.

[0056] In the aluminum corrosion reduction method of the present invention, preferably, the aluminum corrosion reduction cleaning agent composition of the present invention is brought into direct contact with a hard surface. Since it is sufficient to leave the composition in contact with the surface, there is no need to apply external force such as mechanical force, such as scrubbing with a flexible material like a sponge, during cleaning. The aluminum corrosion reducing cleaning agent composition of the present invention may include the step of rinsing a hard surface that has been in contact with the aluminum corrosion reducing cleaning agent composition with water, preferably the step of letting the hard surface that has been in contact with the aluminum corrosion reducing cleaning agent composition stand for a while and then rinsing it with water.

[0057] [(a) Method for reducing aluminum corrosion using component] The present invention provides a method for reducing corrosion of aluminum and / or anodized metal surfaces by component (a) by incorporating component (b) into a cleaning agent composition containing component (a) and water (hereinafter simply referred to as the method for reducing aluminum corrosion by component (a)). By bringing a cleaning composition containing component (a) and water, and component (b) into contact with a hard surface including the metal surface of aluminum and / or anodized aluminum, the cleaning agent can remove very difficult-to-remove dirt containing hardness components attached to the hard surface by component (a), and the corrosion of the metal surface of aluminum and / or anodized aluminum can be reduced by component (b). The aluminum corrosion reduction method using component (a) of the present invention can be appropriately applied to the embodiments described in the aluminum corrosion reduction cleaning agent composition and the aluminum corrosion reduction method of the present invention.

[0058] In the aluminum corrosion reduction method using component (a) of the present invention, the cleaning agent composition containing component (a) and water may contain component (c) in addition to component (b). A cleaning agent composition containing component (a) and water, further containing component (b) and optionally component (c), is the cleaning agent composition for reducing aluminum corrosion of the present invention, and the embodiments described in the cleaning agent composition for reducing aluminum corrosion of the present invention can be applied as appropriate.

[0059] The method of bringing a cleaning agent composition containing component (a) and water, and optionally containing component (b) and component (c), into contact with a hard surface including an aluminum and / or anodized metal surface is the same as the embodiment described in the aluminum corrosion reduction method of the present invention. [Examples]

[0060] Using the following components, aluminum corrosion-reducing cleaning agent compositions shown in Tables 1-3 were prepared and evaluated for the following items. The results are shown in Tables 1-3. For the aluminum corrosion-reducing cleaning agent compositions in Tables 1-3, components (a), (b), (b'), (c), and (c') were added in the amounts shown in the table and dissolved at room temperature (25°C). After mixing, the pH was adjusted to 7 using sulfuric acid. The pH was measured using the glass electrode method. The mass percentages of the components in Tables 1-3 are all based on the effective content.

[0061] <Composition ingredients> (a) component a-1, EDTA: Ethylenediaminetetraacetate tetrasodium, manufactured by Chubu Kirest Co., Ltd. (b) Component • b-1, Lactic acid: Manufactured by Fuso Chemical Industry Co., Ltd. • b-2, Malic acid: Manufactured by Fuso Chemical Industry Co., Ltd. b-3, Tartaric acid: Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. • b-4, Citric Acid: Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. (b') Component (comparison component of (b)) • b'-1, Succinic acid: Manufactured by Merck KGaA ·b'-2, Fumaric acid: Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. · b'-3, Malonic acid: Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0062] (c) Component · c-1, C10 benzalkonium chloride: (c2) component, in general formula (c2), R 3c R is an alkyl group with 10 carbon atoms. 4c , R 5c is a methyl group, R 6c is a methylene group, Z - This is a chlorion compound, Rebenol RK, manufactured by Kitahiro Chemical Co., Ltd. • c-2, cocoalkylamine EO(2.1) adduct: (c1) component, in general formula (c1), R 1cR is an alkyl group having 8 to 18 carbon atoms. 2c O is an ethylene oxy group, and the compound has m+n ratio of 2.1. It is called Amito 102 and is manufactured by Kao Corporation. • c-3, MEA: (c3) component, monoethanolamine, manufactured by Mitsui Chemicals, Inc. • c-4, DEA: (c3) component, diethanolamine, manufactured by Tokyo Chemical Industry Co., Ltd. • c-5, TEA: (c3) component, triethanolamine, manufactured by Tokyo Chemical Industry Co., Ltd. • c-6, cocoalkylamine EO(5) adduct: (c1) component, in general formula (c1), R 1c R is an alkyl group having 8 to 18 carbon atoms. 2c O is an ethylene oxy group, and the compound has m+n = 5. It is called Amito 105 and is manufactured by Kao Corporation. • c-7, Octylamine EO(1) adduct: (c1) component, in general formula (c1), R 1c is an alkyl group with 8 carbon atoms, R 2c O is an ethylene oxy group, a compound with m+n = 1, Kao Research Prototype. • c-8, Octylamine EO(2) adduct: (c1) component, in general formula (c1), R 1c is an alkyl group with 8 carbon atoms, R 2c O is an ethylene oxy group, and the m+n is 2; Kao Research Prototype. • c-9, decylamine EO(1) adduct: (c1) component, in general formula (c1), R 1c R is an alkyl group having 10 carbon atoms. 2c O is an ethylene oxy group, a compound with m+n = 1, Kao Research Prototype. • c-10, decylamine EO(2) adduct: (c1) component, in general formula (c1), R 1c R is an alkyl group having 10 carbon atoms. 2c O is an ethylene oxy group, and the m+n is 2; Kao Research Prototype. • c-11, laurylamine EO(1) adduct: (c1) component, in general formula (c1), R 1c is an alkyl group with 12 carbon atoms, R 2c O is an ethylene oxy group, a compound with m+n = 1, naimine L-201, manufactured by NOF Corporation. • c-12, laurylamine EO(2) adduct: (c1) component, in general formula (c1), R 1c is an alkyl group with 12 carbon atoms, R 2c O is an ethylene oxy group, and the compound has m+n = 2. It is called Nimeen L-202 and is manufactured by NOF Corporation. • c-13, laurylamine EO(5) adduct: (c1) component, in general formula (c1), R 1c is an alkyl group with 12 carbon atoms, R 2c O is an ethylene oxy group, and the compound has m+n = 5. Kao Corporation research prototype. · c-14, Tetradecylamine EO(5) adduct: (c1) component, in general formula (c1), R 1c is an alkyl group with 14 carbon atoms, R 2c O is an ethylene oxy group, and the compound has m+n = 5. Kao Corporation research prototype.

[0063] [Aluminum corrosion evaluation test] 20g of the prepared aluminum corrosion reduction cleaning agent composition was filled into a standard bottle No. 6 (manufactured by As One Co., Ltd.). One aluminum test piece (A1050P 1.0×20×50mm, manufactured by Engineering Test Service Co., Ltd.) was immersed in the bottle, the lid was closed, and the bottle was left standing in a 40°C constant temperature bath for the specified time shown in Tables 1-3. After that, the aluminum test piece was removed, washed with water, dried at room temperature, and the degree of aluminum corrosion was visually judged from its appearance according to the following criteria. The results are shown in Tables 1-3. 5: No change whatsoever compared to before immersion. 4: Very slight discoloration compared to before immersion. 3: Slight discoloration compared to before immersion. 2: Slight discoloration compared to before immersion. 1: Significant discoloration compared to before immersion.

[0064] [Table 1]

[0065] In Table 1, compared to the cleaning agent compositions of Examples 1 to 4 containing components (a) and (b) of the present invention, the cleaning agent compositions of Comparative Examples 1 to 6, which do not contain component (b), showed corrosion of aluminum in short periods of time, such as 8 hours, 24 hours, and 48 hours, after contact with the cleaning agent composition.

[0066] [Table 2]

[0067] [Table 3]

[0068] In Tables 2 and 3, the cleaning agent compositions of Examples 5 to 41, which further contained component (c) in addition to components (a) and (b), showed an aluminum corrosion inhibitory effect even 72 hours after contact with the cleaning agent composition.

[0069] <Combination example> Table 4 shows examples of formulations of the aluminum corrosion reduction cleaning agent compositions of the present invention using the formulation components described above. These cleaning agent compositions can reduce corrosion of aluminum and / or anodized metal surfaces caused by cleaning.

[0070] [Table 4]

Claims

1. A cleaning agent composition for reducing corrosion of hard surfaces, including aluminum and / or anodized aluminum metal surfaces, comprising: (a) an aminocarboxylic acid type chelating agent [hereinafter referred to as component (a)]; (b) one or more selected from lactic acid, malic acid, tartaric acid, citric acid, and salts thereof [hereinafter referred to as component (b)]; (c) a polyoxyalkylene alkyl or alkenylamine having an alkyl or alkenyl group having 8 to 18 carbon atoms and an average number of added moles of oxyalkylene groups of 1 to 20 [hereinafter referred to as component (c)]; and water.

2. (a) A cleaning agent composition for reducing corrosion of hard surfaces, including the aluminum and / or anodized metal surface described in claim 1, comprising 0.1% by mass or more and 5% by mass or less of component (a).

3. A cleaning agent composition for reducing corrosion of hard surfaces, including aluminum and / or anodized aluminum metal surfaces, according to claim 1 or 2, wherein the mass ratio (a) / (b) of the content of component (a) to the content of component (b) is 0.1 or more and 10 or less.

4. A cleaning agent composition for reducing corrosion of hard surfaces, including aluminum and / or anodized aluminum metal surfaces, according to any one of claims 1 to 3, wherein the mass ratio (a) / (c) of the content of component (a) to the content of component (c) is 0.2 or more and 5 or less.

5. A method for reducing corrosion on a hard surface, including an aluminum and / or anodized metal surface, comprising cleaning the hard surface, including an aluminum and / or anodized metal surface, by bringing the cleaning agent composition for reducing corrosion on a hard surface, including an aluminum and / or anodized metal surface, according to any one of claims 1 to 4 into contact with the hard surface.

6. A method for reducing corrosion of the metal surface of aluminum and / or anodized aluminum by component (a) by adding (b) one or more selected from lactic acid, malic acid, tartaric acid, citric acid, and salts thereof, and (c) a polyoxyalkylene alkyl or alkenylamine having an alkyl or alkenyl group having 8 to 18 carbon atoms and an average number of added moles of oxyalkylene groups of 1 to 20.

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