Cleaning agent composition for metal article

Abstract

The present invention is a cleaning agent composition for metal articles, which contains an amine (component A) represented by general formula (I), a nonionic surfactant (component B) represented by general formula (II), a nitrogen-containing nonionic surfactant (component C) represented by general formula (III), and water (component D), and which has a pH of 7.1 or more. According to the present invention, it is possible to provide a cleaning agent composition for metal members, which has sufficient cleaning properties at room temperature and excellent drying properties at room temperature, and which can contribute to the reduction of environmental burden.

Description

Technical Field

[0001] The present invention relates to a cleaning agent composition for metal articles. Background Art

[0002] Metals such as iron, copper, and aluminum are processed and used in industrial products in various fields. In the manufacture of such metal articles, various cleaning agents are used for the purpose of removing dirt adhering to the surface during processing and finishing. The function required of the cleaning agent is to clean the surface of the metal. However, since the metal is easily corroded by oxidation with oxygen in the air, it is usually necessary to perform an anticorrosion treatment such as applying an anticorrosion agent after cleaning, and then remove the unnecessary anticorrosion agent from the metal surface immediately before the operation of the next process to clean the metal surface, increasing the operation process. In such a case, by using a cleaning agent having an anticorrosion property in addition to a high cleaning performance as the cleaning agent, the operation efficiency can be improved (for example, Japanese Patent Laid-Open No. 2020-117644). Summary of the Invention

[0003] The present invention provides a cleaning agent composition for metal articles, which contains:

[0004] An amine represented by the general formula (I) (Component A):

[0005] [Chemical Formula 1]

[0006]

[0007] (In the general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group, or a hydroxypropyl group, and R 3 is a hydroxyethyl group or a hydroxypropyl group.);

[0008] A nonionic surfactant represented by the general formula (II) (Component B):

[0009] R 4 -O-{(EO)n 1 / (PO)m 1}-H (II)

[0010] (In the general formula (II), R 4 is an alkyl group having 12 or more and 16 or less carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average addition mole number of EO, m 1 is the average addition mole number of PO, n 1 is a number of 2 or more and 20 or less, and m 1is a number of 0 or more and 20 or less, and the addition mode of PO and EO in {} can be randomly arranged or block arranged at will.);

[0011] The nitrogen-containing nonionic surfactant (component C) represented by the general formula (III):

[0012] [Chemical formula 2]

[0013]

[0014] (In the general formula (III), R 5 is an alkyl or cycloalkyl group with an average carbon number of 8 or more and 18 or less, EO is an oxyethylene group, PO is an oxypropylene group, n 2 is the average addition molar number of EO, m 2 is the average addition molar number of PO, n 2 is a number of 1 or more and 8 or less, m 2 is a number of 0 or more and 8 or less, and the addition mode of PO and EO in {} can be randomly arranged or block arranged at will.); and water (component D), and the pH is 7.1 or more.

[0015] In addition, the present invention is a method for cleaning a metal article, and the method has a cleaning step of cleaning the metal article with the above-mentioned cleaning agent composition for metal articles.

[0016] In addition, the present invention is a method for cleaning a metal article, and the method has a drying step of drying the metal article while removing the remaining cleaning agent composition for metal articles attached to the metal article by blowing air after the above-mentioned cleaning step.

[0017] In addition, the present invention is a composition for removing processing oil for metal articles, which contains:

[0018] The amine (component A) represented by the general formula (I):

[0019] [Chemical formula 3]

[0020]

[0021] (In the general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group with 1 or more and 6 or less carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group or a hydroxypropyl group, and R 3 is a hydroxyethyl group or a hydroxypropyl group.);

[0022] The nonionic surfactant (component B) represented by the general formula (II):

[0023] R 4 -O-{(EO)n1 / (PO)m 1}-H (II)

[0024] (In general formula (II), R 4 is an alkyl group having 12 or more and 16 or less carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average number of moles of addition of EO, m 1 is the average number of moles of addition of PO, n 1 is a number of 2 or more and 20 or less, m 1 is a number of 0 or more and 20 or less. The addition mode of PO and EO in {} is arbitrarily selected from random arrangement and block arrangement.)

[0025] The nitrogen-containing nonionic surfactant (component C) represented by general formula (III):

[0026] [Chemical formula 4]

[0027]

[0028] (In general formula (III), R 5 is an alkyl group or cycloalkyl group having an average carbon number of 8 or more and 18 or less, EO is an oxyethylene group, PO is an oxypropylene group, n 2 is the average number of moles of addition of EO, m 2 is the average number of moles of addition of PO, n 2 is a number of 1 or more and 8 or less, m 2 is a number of 0 or more and 8 or less. The addition mode of PO and EO in {} is arbitrarily selected from random arrangement and block arrangement.); and water (component D), and the pH is 7.1 or more.

[0029] In addition, the present invention is a method for removing a processing oil from a metal article, and the method has a removing step of removing the processing oil attached to the metal article during the manufacture of the metal article from the metal article using the above-mentioned processing oil removing agent composition for metal articles. Detailed implementation mode

[0030] From the viewpoint of cleaning performance, conventional cleaning agents have been used after being heated to about 60 °C or higher. It takes a large amount of energy cost to heat the cleaning agent to a given temperature, and there is room for improvement from the viewpoint of reducing the environmental burden.

[0031] In addition, metal articles cleaned with conventional cleaning agents are usually provided to a drying step of removing the remaining cleaning agent and drying while blowing air at a high temperature of about 80 °C or higher. A large amount of energy cost is also required in the drying step of drying the conventional cleaning agent, and based on this, there is also room for improvement from the viewpoint of reducing the environmental burden.

[0032] An object of the present invention is to provide a cleaning agent composition for metal articles that has sufficient detergency at room temperature, excellent drying property at room temperature, and can contribute to reducing the environmental burden, a method for cleaning metal articles using the cleaning agent composition for metal articles, a processing oil removing agent composition for metal articles, and a method for removing processing oil from metal articles.

[0033] The present invention relates to a cleaning agent composition for metal articles, which contains:

[0034] an amine represented by the general formula (I) (component A):

[0035] [Chemical formula 5]

[0036]

[0037] (In the general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group, or a hydroxypropyl group, and R 3 is a hydroxyethyl group or a hydroxypropyl group.);

[0038] a nonionic surfactant represented by the general formula (II) (component B):

[0039] R 4 -O-{(EO)n 1 / (PO)m 1}-H (II)

[0040] (In the general formula (II), R 4 is an alkyl group having 12 or more and 16 or less carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average addition mole number of EO, m 1 is the average addition mole number of PO, n 1 is a number of 2 or more and 20 or less, m 1 is a number of 0 or more and 20 or less, and the addition mode of PO and EO in {} is optionally either a random arrangement or a block arrangement.);

[0041] a nitrogen-containing nonionic surfactant represented by the general formula (III) (component C):

[0042] [Chemical formula 6]

[0043]

[0044] (In the general formula (III), R 5is an alkyl or cycloalkyl group having an average carbon number of 8 or more and 18 or less, EO is an oxyethylene group, PO is an oxypropylene group, n 2 is the average number of moles of addition of EO, m 2 is the average number of moles of addition of PO, n 2 is a number of 1 or more and 8 or less, m 2 is a number of 0 or more and 8 or less. The addition mode of PO and EO in {} can be randomly arranged or block arranged. ); and water (component D), with a pH of 7.1 or more.

[0045] In addition, the present invention is a method for cleaning a metal article, which has a cleaning step of cleaning the metal article with the above-mentioned cleaning agent composition for metal articles.

[0046] In addition, the present invention is a method for cleaning a metal article, which has a drying step of drying the metal article while removing the remaining cleaning agent composition for metal articles attached to the metal article by blowing after the above-mentioned cleaning step.

[0047] In addition, the present invention is a processing oil remover composition for metal articles, which contains:

[0048] an amine represented by the general formula (I) (component A):

[0049] [Chemical formula 7]

[0050]

[0051] (In the general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group or a hydroxypropyl group, and R 3 is a hydroxyethyl group or a hydroxypropyl group. );

[0052] a nonionic surfactant represented by the general formula (II) (component B):

[0053] R 4 -O-{(EO)n 1 / (PO)m 1}-H (II)

[0054] (In the general formula (II), R 4 is an alkyl group having 12 or more and 16 or less carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average number of moles of addition of EO, m 1 is the average number of moles of addition of PO, n 1 is a number of 2 or more and 20 or less, m 1is a number of 0 or more and 20 or less, and the addition mode of PO and EO in {} can be randomly arranged or block arranged.));

[0055] The nitrogen-containing nonionic surfactant (component C) represented by the general formula (III):

[0056] [Chemical formula 8]

[0057]

[0058] (In the general formula (III), R 5 is an alkyl or cycloalkyl group with an average carbon number of 8 or more and 18 or less, EO is an oxyethylene group, PO is an oxypropylene group, n 2 is the average addition molar number of EO, m 2 is the average addition molar number of PO, n 2 is a number of 1 or more and 8 or less, m 2 is a number of 0 or more and 8 or less, and the addition mode of PO and EO in {} can be randomly arranged or block arranged.)); and water (component D), and the pH is 7.1 or more.

[0059] In addition, the present invention is a method for removing machining oil from a metal article, and the method has a removing step of removing the machining oil attached to the metal article during the manufacture of the metal article from the metal article using the above-mentioned machining oil removing agent composition for metal articles.

[0060] According to the present invention, it is possible to provide a cleaning agent composition for metal articles that has sufficient detergency at room temperature, excellent drying property at room temperature, and can contribute to reducing the environmental burden, a cleaning method for metal articles using the cleaning agent composition for metal articles, a machining oil removing agent composition for metal articles, and a machining oil removing method for metal articles.

[0061] Hereinafter, an embodiment of the present invention will be described.

[0062] <Cleaning agent composition for metal articles>

[0063] The cleaning agent composition for metal articles (hereinafter sometimes also referred to as the cleaning agent composition) of this embodiment contains:

[0064] The amine (component A) represented by the general formula (I):

[0065] [Chemical formula 9]

[0066]

[0067] (In the general formula (I), R 1 and R 2Each independently represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group or a hydroxypropyl group, R 3 is a hydroxyethyl group or a hydroxypropyl group.);

[0068] A nonionic surfactant (Component B) represented by the general formula (II):

[0069] R 4 -O-{(EO)n 1 / (PO)m 1}-H (II)

[0070] (In the general formula (II), R 4 is an alkyl group having 12 to 16 carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average number of moles of addition of EO, m 1 is the average number of moles of addition of PO, n 1 is a number of 2 or more and 20 or less, m 1 is a number of 0 or more and 20 or less, and the addition mode of PO and EO in {} is arbitrarily selected from random arrangement and block arrangement.)

[0071] A nitrogen-containing nonionic surfactant (Component C) represented by the general formula (III):

[0072] [Chemical formula 10]

[0073]

[0074] (In the general formula (III), R 5 is an alkyl group or cycloalkyl group having an average of 8 to 18 carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 2 is the average number of moles of addition of EO, m 2 is the average number of moles of addition of PO, n 2 is a number of 1 or more and 8 or less, m 2 is a number of 0 or more and 8 or less, and the addition mode of PO and EO in {} is arbitrarily selected from random arrangement and block arrangement.); and water (Component D), and the pH is 7.1 or more.

[0075] The cleaning agent composition for metal articles according to this embodiment has sufficient detergency at room temperature and excellent drying property at room temperature, and can contribute to the reduction of environmental burden. The reason why the above cleaning agent composition exhibits such an effect is not certain, but the following is considered.

[0076] Regarding the above cleaning agent composition, in the presence of the above amine (Component A), the pH is set to 7.1 or higher (i.e., alkaline), whereby saponification of oils and fats can be promoted and the cleaning effect can be improved. In addition, it is speculated that due to the actions of the above nonionic surfactant (Component B), the above nitrogen-containing nonionic surfactant (Component C), and the above water (Component D), the above cleaning agent composition penetrates into narrow gaps and fillet corners of metal articles, and the above cleaning agent composition can efficiently contact the object to be cleaned, improving the cleaning effect. Furthermore, it is speculated that by combining the above nonionic surfactant (Component B) with the above nitrogen-containing nonionic surfactant (Component C), rapid penetration and action on dirt adhering to the metal surface, especially organic dirt, reduce the surface tension and viscosity, and introduce the dirt from the metal surface into the above cleaning agent composition, thereby enabling efficient removal. Moreover, it is speculated that due to the interaction of the above nonionic surfactant (Component B), the above nitrogen-containing nonionic surfactant (Component C), and the above water (Component D), high wettability is exhibited, whereby the amount of attached water remaining on the object to be cleaned after dirt cleaning is reduced, and thus the drying property is improved.

[0077] [Amine (Component A)]

[0078] The above amine (Component A) is represented by the above general formula (I). The above amine (Component A) can be used alone or in combination of two or more.

[0079] Examples of the above amine (Component A) include alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine, as well as their alkylated products and aminoalkylated products. From the viewpoint of improving the detergency, the above amine (Component A) is preferably at least one selected from monoethanolamine, monoisopropanolamine, N-methylmonoethanolamine, N-methylmonoisopropanolamine, N-ethylmonoethanolamine, N-ethylmonoisopropanolamine, N-phenylmonoethanolamine, N-phenylmonoisopropanolamine, N-benzylmonoethanolamine, N-benzylmonoisopropanolamine, diethanolamine, diisopropanolamine, N-dimethylmonoethanolamine, N-dimethylmonoisopropanolamine, N-methyldiethanolamine, N-methyldiisopropanolamine, N-diethylmonoethanolamine, N-diethylmonoisopropanolamine, N-ethyldiethanolamine, N-ethyldiisopropanolamine, N-phenyldiethanolamine, N-phenyldiisopropanolamine, N-benzyl diethanolamine, N-benzyl diisopropanolamine, triethanolamine, N-(β-aminoethyl)monoethanolamine, N-(β-aminoethyl)monoisopropanolamine, N-(β-aminoethyl)diethanolamine, and N-(β-aminoethyl)diisopropanolamine; more preferably at least one selected from monoethanolamine, monoisopropanolamine, diethanolamine, N-methylmonoethanolamine, N-dimethylmonoethanolamine, N-ethylmonoethanolamine, N-methyldiethanolamine, triethanolamine, and N-(β-aminoethyl)monoethanolamine; and further preferably at least one selected from diethanolamine and triethanolamine.

[0080] Regarding the content of the above amine (Component A) in the above cleaning agent composition, from the viewpoint of improving the detergency, it is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more. Moreover, from the viewpoints of improving the detergency and reducing the waste water treatment load, it is preferably 1.0% by mass or less, more preferably 0.7% by mass or less, still more preferably 0.5% by mass or less.

[0081] [Nonionic surfactant (Component B)]

[0082] The above nonionic surfactant (Component B) is represented by the above general formula (II). The above nonionic surfactant (Component B) can be used alone or in combination of two or more.

[0083] In the above general formula (II), regarding R 4 the number of carbon atoms is 12 or more from the viewpoints of improving the detergency at normal temperature and improving the drying property at normal temperature, and is 16 or less from the same viewpoints. In the above general formula (II), R 4 is an alkyl group, and is preferably a secondary alkyl group from the viewpoints of improving the detergency at normal temperature and improving the drying property at normal temperature.

[0084] In the above general formula (II), the oxyethylene group and the oxypropylene group have a distribution based on the number of moles added. From the viewpoints of improving the detergency at normal temperature and improving the drying property at normal temperature, the average number of moles added n 1 of the oxyethylene group is 2 or more, preferably 3 or more, more preferably 4 or more, still more preferably 5 or more, and is 20 or less, preferably 15 or less, more preferably 10 or less, still more preferably 8 or less from the same viewpoints. In addition, regarding the average number of moles added m 1 of the oxypropylene group, it is 0 or more and 20 or less, preferably 10 or less, more preferably less than 1 from the same viewpoints. In addition, from the viewpoint of improving the detergency, in the above general formula (III), it is preferred that the average number of moles added n 1 of the oxyethylene group is greater than the average number of moles added m 1 of the oxypropylene group.

[0085] Regarding the above nonionic surfactant (Component B), from the viewpoint of improving the detergency at normal temperature, the HLB based on the Griffin method is preferably 3.6 or more and 5.6 or less. It should be noted that in the case of using two or more of the above components (B), the HLB of the weighted average of the HLB based on the Griffin method of each component (B) is used.

[0086] Regarding the content of the above nonionic surfactant (Component B) in the above cleaning agent composition, from the viewpoints of improving the detergency at room temperature and improving the drying property at room temperature, it is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, still more preferably 0.01% by mass or more. Moreover, from the viewpoint of reducing the wastewater treatment load, it is preferably 1.5% by mass or less, more preferably 0.5% by mass or less, still more preferably 0.2% by mass or less.

[0087] Nitrogen-containing nonionic surfactant (Component C)

[0088] The above nitrogen-containing nonionic surfactant (Component C) is represented by the above general formula (III). The above nitrogen-containing nonionic surfactant (Component C) can be used alone or in combination of two or more.

[0089] In the above general formula (III), regarding R 5 The average carbon number of is 8 or more, preferably 12 or more, from the viewpoints of improving the detergency at room temperature and improving the drying property at room temperature. From the same viewpoints, it is 18 or less, preferably 16 or less. It should be noted that the above nitrogen-containing nonionic surfactant (Component C) can be used in combination with surfactants having an average carbon number of R 5 within the above range.

[0090] In the above general formula (III), the oxyethylene group and the oxypropylene group have a distribution based on the number of moles added. From the viewpoints of improving the detergency at room temperature and improving the drying property at room temperature, the average number of moles added n 2 of the oxyethylene group is 1 or more, preferably 1.5 or more. From the same viewpoints, it is 8 or less, preferably 4 or less. In addition, regarding the average number of moles added m 2 of the oxypropylene group, from the same viewpoints, it is 0 or more, from the same viewpoints, it is 8 or less, preferably 4 or less. In addition, from the viewpoint of improving the detergency, in the above general formula (III), it is preferred that the average number of moles added n 2 of the oxyethylene group is greater than the average number of moles added m 2 of the oxypropylene group.

[0091] Regarding the content of the above nitrogen-containing nonionic surfactant (Component C) in the above cleaning agent composition, from the viewpoints of improving the detergency at room temperature and improving the drying property at room temperature, it is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, still more preferably 0.01% by mass or more. Moreover, from the viewpoint of reducing the wastewater treatment load, it is preferably 1.5% by mass or less, more preferably 0.5% by mass or less, still more preferably 0.2% by mass or less.

[0092] The mass ratio of the above nonionic surfactant (Component B) to the above nitrogen-containing nonionic surfactant (Component C) in the above cleaning agent composition (mass of Component B / mass of Component C) is preferably 0.001 or more and 100 or less. Regarding the mass ratio of the above nonionic surfactant (Component B) to the above nitrogen-containing nonionic surfactant (Component C), from the viewpoint of improving detergency, it is more preferably 0.01 or more, and further preferably 0.1 or more. Moreover, from the viewpoint of improving drying property, it is more preferably 10 or less, and further preferably 3 or less.

[0093] [Water (Component D)]

[0094] For the above water (Component D), industrial water, tap water, deionized water, etc. can be used. From the viewpoints of supply and cost, industrial water is preferred, and from the viewpoint of detergency, ion-exchanged water is preferred.

[0095] Regarding the content of the above water (Component D) in the above cleaning agent composition, from the viewpoint of improving detergency, it is preferably 75% by mass or more, more preferably 90% by mass or more, further preferably 98% by mass or more. Moreover, from the same viewpoint, it is preferably 99.97% by mass or less, more preferably 99.6% by mass or less, and further preferably 99.4% by mass or less.

[0096] From the viewpoint of improving detergency, the pH of the above cleaning agent composition is 7.1 or more, preferably 7.5 or more. The upper limit of the pH of the above cleaning agent composition is not particularly limited, but is usually 12 or less.

[0097] [Other Components]

[0098] The above cleaning agent composition may contain components other than the above Components A to D within a range that does not affect the performance. Examples of components other than the above Components A to D include rust inhibitors, antifoaming agents, preservatives, colorants, solubilizers, dispersants, thickeners, and other concentration agents such as thickening agents.

[0099] [Rust Inhibitor]

[0100] The above rust inhibitor can be used without particular limitation as long as it is a substance that prevents the generation of rust on metal articles, but a dicarboxylic acid (Component E) represented by the following general formula (IV) is preferred. This dicarboxylic acid (Component E) can be used alone or in combination of two or more.

[0101] General formula (IV): HOOC-R 6 -COOH (IV)

[0102] (In general formula (IV), R 6 is an alkylene group having 10 to 12 carbon atoms.)

[0103] As the above-mentioned dicarboxylic acid (Component E), for example, 1,10-decanedioic acid, 1,11-undecanedicarboxylic acid, 1,12-dodecanedioic acid can be cited. From the viewpoint of improving the performance of inhibiting corrosion of iron, the above-mentioned dicarboxylic acid (Component E) is preferably 1,10-decanedioic acid.

[0104] The above-mentioned dicarboxylic acid (Component E) forms a salt with the above-mentioned amine (Component A) in water. Therefore, when the above-mentioned cleaning agent composition contains the above-mentioned dicarboxylic acid (Component E), the cleaning agent composition substantially contains a salt (Component E') of the above-mentioned dicarboxylic acid (Component E) and the above-mentioned amine (Component A). The above-mentioned Component E' can be used alone or in combination of two or more. It should be noted that the above-mentioned Component E' in which a salt has been pre-formed can also be used to prepare the above-mentioned cleaning agent composition.

[0105] As the above-mentioned Component E', for example, diethanolamine salt of 1,10-decanedioic acid, diethanolamine salt of 1,11-undecanedicarboxylic acid, diethanolamine salt of 1,12-dodecanedioic acid, triethanolamine salt of 1,10-decanedioic acid, triethanolamine salt of 1,11-undecanedicarboxylic acid, triethanolamine salt of 1,12-dodecanedioic acid, etc. can be cited. From the viewpoints of improving detergency and improving the performance of inhibiting corrosion of iron, the above-mentioned Component E' is preferably diethanolamine salt of 1,10-decanedioic acid and triethanolamine salt of 1,10-decanedioic acid.

[0106] When the above-mentioned cleaning agent composition contains the above-mentioned Component E', regarding the content of the above-mentioned Component E' in the above-mentioned cleaning agent composition, from the viewpoint of improving the performance of inhibiting corrosion of iron, it is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more. Moreover, from the viewpoints of improving detergency and reducing the load of wastewater treatment, it is preferably 1.2% by mass or less, more preferably 0.7% by mass or less, still more preferably 0.5% by mass or less.

[0107] 〔Defoaming agent〕

[0108] In the above-mentioned cleaning agent composition, from the viewpoints of suppressing the reduction in operability caused by foaming and suppressing the loss of the cleaning liquid during discharge, it is preferably to contain a defoaming agent. There is no particular limitation on the defoaming agent, and any defoaming agent can be used as long as it has a defoaming effect. As the defoaming agent, for example, silicone-based defoaming agents, polyethers, higher alcohols and other organic defoaming agents can be cited. Considering the influence on the cleaning performance, it is desirable to use the defoaming agent in a low addition amount, and a silicone-based defoaming agent is preferred. As the silicone-based defoaming agent, for example, there are oil type, oil composite type, solution type, emulsion type, self-emulsifying type, etc. From the viewpoints of improving the defoaming effect and the storage stability of the cleaning agent composition, the self-emulsifying type is preferred.

[0109] The content of the defoamer in the above cleaning agent composition is preferably 0% by mass or more and 5.0% by mass or less, more preferably 0% by mass or more and 2.0% by mass or less, still more preferably 0% by mass or more and 1.0% by mass or less, and even more preferably 0% by mass or more and 0.5% by mass or less.

[0110] [Manufacturing method of cleaning agent composition for metal articles]

[0111] The above cleaning agent composition can be manufactured by mixing the above components by a known method. The above "mixing" includes simultaneously mixing the above components or mixing them in any order.

[0112] The above cleaning agent composition can be prepared in the form of a concentrate with a reduced amount of the above component D within a range that does not impair the storage stability due to separation, precipitation, etc. Regarding the concentrate of the above cleaning agent composition, from the viewpoints of transportation and storage, a concentrate with a dilution ratio of 3 times or more is preferred, and from the viewpoint of storage stability, a concentrate with a dilution ratio of 30 times or less is preferred. The concentrate of the above cleaning agent composition can be diluted with water before use so that each component has the above content (i.e., the content during cleaning) during use. In addition, the components of the concentrate of the above cleaning agent composition can also be added separately during use. In this specification, "during use" or "during cleaning" of the cleaning agent composition in the concentrated solution refers to the state after the concentrate of the above cleaning agent composition is diluted.

[0113] <Metal processing oil remover composition for metal articles>

[0114] The above cleaning agent composition can also be a metal processing oil remover composition (hereinafter sometimes also referred to as a remover composition) for removing the processing oil attached to the above metal article during the manufacture of the above metal article from the above metal article. That is, the remover composition contains the above component A, the above component B, the above component C, and the above component D, and the pH is 7.1 or more. According to this remover composition, for the same reasons as the above cleaning agent composition, it has sufficient processing oil removability at normal temperature and excellent drying property at normal temperature, and can contribute to the reduction of the environmental burden.

[0115] <Cleaning method for metal articles>

[0116] The cleaning method for metal articles in this embodiment includes a cleaning step of cleaning the metal article using the above cleaning agent composition.

[0117] [Cleaning step]

[0118] Regarding the cleaning temperature in the above cleaning process, from the viewpoints of reducing energy costs and environmental burdens, it is preferably 80 °C or lower, more preferably 70 °C or lower, and further preferably 60 °C or lower. It should be noted that since the above cleaning agent composition has sufficient cleaning performance at room temperature, the above cleaning temperature can be 30 °C or lower. In addition, regarding the above cleaning temperature, from the viewpoint of cleaning performance, it is preferably 10 °C or higher, more preferably 20 °C or higher.

[0119] Regarding the cleaning time in the above cleaning process, since the above cleaning temperature and the like also have an impact, it is difficult to generalize. However, from the viewpoint of improving cleaning performance, it is usually preferably 0.5 seconds or longer, more preferably 1 second or longer, and further preferably 5 seconds or longer. From the viewpoint of improving productivity, it is preferably 100 seconds or shorter, more preferably 60 seconds or shorter.

[0120] As the cleaning method in the above cleaning process, continuous cleaning, that is, immersion cleaning, spray cleaning, brushing, ultrasonic cleaning, etc. can be cited, and it is possible to clean and remove oil stains such as cutting oil and ATF oil, as well as solid dirt such as dust and processing debris attached during the processing, storage period of individual metal parts, and assembly of metal articles. The cleaning method in the above cleaning process is preferably immersion and spray cleaning, more preferably spray cleaning, and can be suitably applied to the case where metal articles pass through a cleaning tank by means of a belt conveyor or a roller conveyor.

[0121] In the above spray cleaning, the spray pressure during spray cleaning is preferably 0.1 MPa or higher, more preferably 0.2 MPa or higher, and preferably 5 MPa or lower, more preferably 1 MPa or lower.

[0122] After the above cleaning process, a rinsing treatment process for rinsing the cleaned metal articles with water or the like can be provided. However, since the above cleaning agent composition is removed from the surface of the above metal articles once the rinsing treatment is performed, there is a case where the drying property at room temperature and the corrosion inhibition performance for iron are reduced. Therefore, it is preferably not to perform a rinsing treatment after the above cleaning process. That is, the above cleaning agent composition can be used as a non-rinse type cleaning agent composition for metal articles.

[0123] 〔Drying process〕

[0124] The above cleaning method can have a drying process for drying the above metal articles with the remaining above cleaning agent composition attached to the surface after the above cleaning process.

[0125] Regarding the drying temperature in the above drying process, from the viewpoints of reducing energy costs and environmental burdens, it is preferably 100 °C or lower, more preferably 90 °C or lower, and further preferably 80 °C or lower. It should be noted that since the drying property of the above cleaning agent composition at room temperature is excellent, the above drying temperature can be 30 °C or lower. Additionally, regarding the above drying temperature, from the viewpoint of improving productivity, it is preferably 10 °C or higher, more preferably 20 °C or higher.

[0126] The above drying process can also be a drying process in which the remaining above cleaning agent composition is removed from the metal article by air blowing or the like and dried. In this case, regarding the temperature of the above blowing, from the viewpoint of improving productivity, it is preferably 20 °C or higher, more preferably 30 °C or higher, and further preferably 40 °C or higher; from the viewpoints of reducing energy costs and environmental burdens, it is preferably 100 °C or lower, more preferably 90 °C or lower, and further preferably 80 °C or lower.

[0127] The above metal article that can be cleaned with the above cleaning agent composition is not particularly limited. However, for example, metal products and metal parts that are raw materials for transportation machinery such as automobiles, bicycles, railways, ships, and airplanes, home appliances such as televisions, air conditioners, and refrigerators, electronic devices such as portable terminals and computers, tableware, and beverage cans can be cited.

[0128] <Method for Removing Processing Oil from Metal Articles>

[0129] According to the above cleaning method, the processing oil attached to the above metal article during the manufacture of the above metal article can be removed. Thus, the above cleaning method can also be a processing oil removal method. The processing oil removal method of this embodiment has a removal step of removing the processing oil attached to the above metal article during the manufacture of the above metal article from the above metal article using the above removal agent composition. The preferred mode of the above removal step is the same as the preferred mode of the above cleaning step in the cleaning method of the above metal article, so the description is omitted. Additionally, the preferred mode of the above processing oil removal method is the same as the preferred mode of the cleaning method of the above metal article, so the description is omitted.

[0130] Regarding the above embodiments, the present specification further discloses the following compositions, etc.

[0131] <1>

[0132] A cleaning agent composition for metal articles, which contains:

[0133] An amine represented by the general formula (I) (Component A):

[0134] [Chemical Formula 11]

[0135]

[0136] (In general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group or a hydroxypropyl group, and R 3 is a hydroxyethyl group or a hydroxypropyl group.);

[0137] The nonionic surfactant (Component B) represented by general formula (II):

[0138] R 4 -O-{(EO)n 1 / (PO)m 1}-H (II)

[0139] (In general formula (II), R 4 is an alkyl group having 12 or more and 16 or less carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average number of moles of addition of EO, m 1 is the average number of moles of addition of PO, n 1 is a number of 2 or more and 20 or less, m 1 is a number of 0 or more and 20 or less, and the addition mode of PO and EO in {} is optionally either a random arrangement or a block arrangement.);

[0140] The nitrogen-containing nonionic surfactant (Component C) represented by general formula (III):

[0141] [Chemical formula 12]

[0142]

[0143] (In general formula (III), R 5 is an alkyl group or cycloalkyl group having an average carbon number of 8 or more and 18 or less, EO is an oxyethylene group, PO is an oxypropylene group, n 2 is the average number of moles of addition of EO, m 2 is the average number of moles of addition of PO, n 2 is a number of 1 or more and 8 or less, m 2 is a number of 0 or more and 8 or less, and the addition mode of PO and EO in {} is optionally either a random arrangement or a block arrangement.); and water (Component D),

[0144] The pH is 7.1 or more.

[0145] <2>

[0146] According to the cleaning agent composition for metal articles described in <1> above, wherein the HLB of the above-mentioned component B based on the Griffin method is 3.6 or more and 5.6 or less.

[0147] <3>

[0148] According to the cleaning agent composition for metal articles described in <1> or <2> above, wherein in the above general formula (II), R 4 is a secondary alkyl group having 12 or more and 16 or less carbon atoms.

[0149] <4>

[0150] According to the cleaning agent composition for metal articles described in any one of <1> to <3> above, wherein the content of the above-mentioned component A is 0.01% by mass or more and 1.0% by mass or less.

[0151] <5>

[0152] According to the cleaning agent composition for metal articles described in any one of <1> to <4> above, wherein the content of the above-mentioned component B is 0.001% by mass or more and 1.5% by mass or less.

[0153] <6>

[0154] According to the cleaning agent composition for metal articles described in any one of <1> to <5> above, wherein the content of the above-mentioned component C is 0.001% by mass or more and 1.5% by mass or less.

[0155] <7>

[0156] According to the cleaning agent composition for metal articles described in any one of <1> to <6> above, which contains a dicarboxylic acid (component E) represented by the general formula (IV):

[0157] HOOC-R 6 -COOH (IV)

[0158] (In the general formula (IV), R 6 is an alkylene group having 10 or more and 12 or less carbon atoms.).

[0159] <8> According to the cleaning agent composition for metal articles described in any one of <1> to <7> above, which contains a salt (component E') of the dicarboxylic acid (component E) represented by the general formula (IV) and the above-mentioned amine (component A):

[0160] HOOC-R 6 -COOH (IV)

[0161] (In the general formula (IV), R 6 is an alkylene group having 10 or more and 12 or less carbon atoms.).

[0162] <9>

[0163] The cleaning agent composition for metallic articles according to any one of <1> to <8> above, wherein the mass ratio of the above-mentioned component B to the above-mentioned component C (mass of the above-mentioned component B / mass of the above-mentioned component C) is 0.001 or more and 100 or less.

[0164] <10>

[0165] The cleaning agent composition for metallic articles according to any one of <1> to <9> above, which contains an antifoaming agent.

[0166] <11>

[0167] The cleaning agent composition for metallic articles according to any one of <1> to <10> above, wherein the content of the above-mentioned water is 75% by mass or more and 99.97% by mass or less.

[0168] <12>

[0169] A method for cleaning metallic articles, which has a cleaning step of cleaning metallic articles using the cleaning agent composition for metallic articles according to any one of <1> to <11> above.

[0170] <13>

[0171] The method for cleaning metallic articles according to <12> above, wherein the cleaning temperature in the above-mentioned cleaning step is 10°C or more and 30°C or less.

[0172] <14>

[0173] The method for cleaning metallic articles according to <12> or <13> above, wherein after the above-mentioned cleaning step, there is a drying step of drying the metallic articles having the cleaning agent composition for metallic articles attached to their surfaces.

[0174] <15>

[0175] The method for cleaning metallic articles according to <14> above, wherein the above-mentioned drying step is a drying step of drying the metallic articles while removing the remaining cleaning agent composition for metallic articles attached to the metallic articles by blowing air.

[0176] <16>

[0177] The method for cleaning metallic articles according to <14> or <15> above, wherein the drying temperature in the above-mentioned drying step is 10°C or more and 30°C or less.

[0178] <17>

[0179] A processing oil remover composition for metal articles, comprising:

[0180] An amine represented by the general formula (I) (Component A):

[0181] [Chemical formula 13]

[0182]

[0183] (In the general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group or a hydroxypropyl group, and R 3 is a hydroxyethyl group or a hydroxypropyl group.);

[0184] A nonionic surfactant represented by the general formula (II) (Component B):

[0185] R 4 -O-{(EO)n 1 / (PO)m 1}-H (II)

[0186] (In the general formula (II), R 4 is an alkyl group having 12 or more and 16 or less carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average addition mole number of EO, m 1 is the average addition mole number of PO, n 1 is a number of 2 or more and 20 or less, m 1 is a number of 0 or more and 20 or less, and the addition mode of PO and EO in {} is optionally either random arrangement or block arrangement.);

[0187] A nitrogen-containing nonionic surfactant represented by the general formula (III) (Component C):

[0188] [Chemical formula 14]

[0189]

[0190] (In the general formula (III), R 5 is an alkyl group or cycloalkyl group having an average carbon number of 8 or more and 18 or less, EO is an oxyethylene group, PO is an oxypropylene group, n 2 is the average addition mole number of EO, m 2 is the average addition mole number of PO, n 2 is a number of 1 or more and 8 or less, m 2is a number of 0 or more and 8 or less, and the addition mode of PO and EO in {} is arbitrarily selected from either random arrangement or block arrangement.); and water (Component D),

[0191] The pH is 7.1 or more.

[0192] <18>

[0193] A method for removing processing oil from a metal article, the method having a removing step of removing the processing oil attached to the metal article during the manufacture of the metal article from the metal article using the processing oil removing agent composition for metal articles described in the above <17>.

[0194] <20>

[0195] An application of a composition in the removal of processing oil for metal articles, the composition containing:

[0196] An amine (Component A) represented by the general formula (I):

[0197] [Chemical formula 15]

[0198]

[0199] (In the general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group or a hydroxypropyl group, and R 3 is a hydroxyethyl group or a hydroxypropyl group.)

[0200] A nonionic surfactant (Component B) represented by the general formula (II):

[0201] R 4 -O-{(EO)n 1 / (PO)m 1}-H (II)

[0202] (In the general formula (II), R 4 is an alkyl group having 12 or more and 16 or less carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average addition molar number of EO, m 1 is the average addition molar number of PO, n 1 is a number of 2 or more and 20 or less, m 1 is a number of 0 or more and 20 or less, and the addition mode of PO and EO in {} is arbitrarily selected from either random arrangement or block arrangement.)

[0203] A nitrogen-containing nonionic surfactant (Component C) represented by the general formula (III):

[0204] [Chemical 16]

[0205]

[0206] (In general formula (III), R 5 is an alkyl or cycloalkyl group having an average carbon number of 8 or more and 18 or less, EO is an oxyethylene group, PO is an oxypropylene group, n 2 is the average number of moles of addition of EO, m 2 is the average number of moles of addition of PO, n 2 is a number from 1 to 8, m 2 is a number from 0 to 8, and the addition mode of PO and EO in {} is optionally either a random arrangement or a block arrangement.) And water (Component D),

[0207] The pH is 7.1 or more.

[0208] Examples

[0209] Hereinafter, the present invention will be described in further detail using examples, however, the present invention is not limited by any of these examples.

[0210] <Preparation of cleaning agent composition>

[0211] 300 g of the cleaning agent compositions of Examples 1 to 31 and Comparative Examples 1 to 14 were prepared by the following steps so as to have the contents shown in Tables 1 to 3. The values described in Tables 1 to 3 represent the amounts of active ingredients, and the unit is mass%. In addition, the HLB values described in Tables 1 to 3 were calculated and obtained by the Griffin method.

[0212] 〔Preparation steps〕

[0213] 1. In a 300 ml glass beaker, the alkali agent (Component A) and water (Component D) were mixed and stirred to obtain a mixed solution.

[0214] 2. To the mixed solution obtained in 1 above, a nonionic surfactant (Component B), a nitrogen-containing nonionic surfactant (Component C), and, in the case where there are other components, the other components were added and mixed and stirred to obtain a cleaning agent composition for metal articles of each example and comparative example.

[0215] The following substances were used for each component described in Tables 1 to 3.

[0216] · Component A (amine represented by formula (I))

[0217] A1: Diethanolamine (manufactured by Fujifilm Wako Pure Chemical Corporation, Diethanolamine (DEA))

[0218] A2: Triethanolamine (manufactured by Kishida Chemical Co., Ltd., 2,2’,2”-nitrilotriethanol)

[0219] A3: N-Methyldiethanolamine (manufactured by Tokyo Chemical Industry Co., Ltd., 2-Hydroxyethyl(methylamino)ethanol)

[0220] A4: N-Methylethanolamine (manufactured by Tokyo Chemical Industry Co., Ltd., 2-(Methylamino)ethanol)

[0221] · Component B

[0222] B1: Polyethylene glycol (2) lauryl ether [manufactured by Kao Corporation]. Note that the number in () represents the average number of moles of addition. The same applies hereinafter.

[0223] B2: Polyethylene glycol (4) lauryl ether [manufactured by Kao Corporation]

[0224] B3: Polyethylene glycol (5) lauryl ether [manufactured by Kao Corporation]

[0225] B4: Polyethylene glycol (6) lauryl ether [manufactured by Kao Corporation]

[0226] B5: Polyethylene glycol (6.5) tridecyl ether [manufactured by Aoki Yushi Kogyo Co., Ltd., FINESURF TD-65]

[0227] B6: Polyethylene glycol (8) tridecyl ether [manufactured by Aoki Yushi Kogyo Co., Ltd., FINESURF TD-80]

[0228] B7: Surfactant B7 obtained by the following method

[0229] Polyethylene glycol (7) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether (1 mol, manufactured by Nippon Shokubai Co., Ltd., "SOFTANOL 70") and a catalytic amount of potassium hydroxide (manufactured by NACALAI TESQUE, Inc.) were added to an autoclave. After purging with nitrogen, dehydration was carried out under reduced pressure to make the water content in the system 0.2% or less. Propylene oxide (4.5 mol) was added at 125 °C and 0.3 MPa or less, and aging was carried out to obtain an EO-PO adduct (surfactant B7).

[0230] B8: Surfactant B8 obtained by the following method

[0231] Polyethylene glycol (7) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether (1 mole, manufactured by Nippon Shokubai Co., Ltd., trade name "SOFTANOL 70") and a catalytic amount of potassium hydroxide (manufactured by NACALAI TESQUE, Inc.) were added to an autoclave. After purging with nitrogen, dehydration was carried out under reduced pressure to reduce the water content in the system to 0.2% or less. Propylene oxide (8.5 moles) was added at 125 °C under 0.3 MPa or less, and then aging was carried out to obtain an EO-PO adduct (surfactant B8).

[0232] B9: Surfactant B9 obtained by the following method

[0233] Polyethylene glycol (9) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether (1 mole, manufactured by Nippon Shokubai Co., Ltd., trade name "SOFTANOL 90") and a catalytic amount of potassium hydroxide (manufactured by NACALAI TESQUE, Inc.) were added to an autoclave. After purging with nitrogen, dehydration was carried out under reduced pressure to reduce the water content in the system to 0.2% or less. Propylene oxide (5.0 moles) was added at 125 °C under 0.3 MPa or less, and then aging was carried out to obtain an EO-PO adduct (surfactant B9).

[0234] B10: Surfactant B10 obtained by the following method

[0235] Polyethylene glycol (9) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether (1 mole, manufactured by Nippon Shokubai Co., Ltd., trade name "SOFTANOL 90") and a catalytic amount of potassium hydroxide (manufactured by NACALAI TESQUE, Inc.) were added to an autoclave. After purging with nitrogen, dehydration was carried out under reduced pressure to reduce the water content in the system to 0.2% or less. Propylene oxide (15 moles) was added at 125 °C under 0.3 MPa or less, and then aging was carried out to obtain an EO-PO adduct (surfactant B10).

[0236] B11: Polyethylene glycol (8) cetyl ether [manufactured by Aoki Yushi Kogyo Co., Ltd., BLAUNON CH-308]

[0237] B12: Polyethylene glycol (2) 2-ethylhexyl ether [manufactured by Aoki Yushi Kogyo Co., Ltd., BLAUNON EH-2]

[0238] B13: Polyethylene glycol (6) 2-ethylhexyl ether [manufactured by Aoki Yushi Kogyo Co., Ltd., BLAUNON EH-6]

[0239] B14: Polyethylene glycol (11) 2-ethylhexyl ether [manufactured by Aoki Yushi Kogyo Co., Ltd., BLAUNON EH-11]

[0240] B15: Polyethylene glycol (4) decyl (Guerbet) ether [manufactured by BASF, LUTENSOL XL40]

[0241] B16: Polyethylene glycol (8) decyl (Guerbet) ether [manufactured by BASF, LUTENSOL XL80]

[0242] B17: Polyethylene glycol (11) stearyl ether [manufactured by Aoki Yushi Kogyo Co., Ltd., BLAUNON SR - 711]

[0243] · Component C

[0244] C1: Polyoxyethylene laurylamine, average addition molar number of oxyethylene groups is 2.1, manufactured by Kao Corporation

[0245] C2: Polyoxyethylene laurylamine, average addition molar number of oxyethylene groups is 4.2, manufactured by Kao Corporation

[0246] · Component D (water)

[0247] Ion - exchanged water: Pure water of 1 μS / cm or less manufactured using the pure water device G - 10DSTSET of ORGANO Corporation

[0248] · Component E

[0249] 1,10 - Sebacic acid (manufactured by Tokyo Chemical Industry Co., Ltd.)

[0250] · Defoamer

[0251] Tridecanol (manufactured by KH NEOCHEM)

[0252] <Evaluation method>

[0253] 〔pH of the cleaning agent composition〕

[0254] The pH is the pH of the cleaning agent composition at 25°C. The value is measured after immersing the electrode of a pH meter (HM - 30G, manufactured by Toa DKK Corporation) in the cleaning agent composition for 3 minutes.

[0255] 〔Cleaning test〕

[0256] Approximately 0.1 g of processing oil was dropped onto SPCC (50×20×0.8 mm) that had been degreased and cleaned with acetone, and it was left standing for 1 hour. The weight of the SPCC before the addition of the processing oil and the weight of the sample after the addition of the processing oil and standing for 1 hour were measured, and the weight of the adhering oil before cleaning was determined. This sample was cleaned for 10 seconds at room temperature (25°C) and 0.1 Mpa using a spray cleaning machine with the cleaning agent compositions of each example and comparative example, and dried in a constant temperature bath at 50°C for about 15 minutes. The resulting substrate was designated as the post-cleaning substrate. The cleaning rate was calculated using the following formula. The larger this value, the more excellent the cleanability can be said to be.

[0257] Cleaning rate = (Adhering oil content of the sample before cleaning [g] - Adhering oil content of the sample after cleaning [g]) / Adhering oil content of the sample before cleaning [g] × 100

[0258] [Contact angle measurement]

[0259] After degreasing and cleaning SPCC (size 50×20×0.8 mm) with acetone, it was dried by blowing air. Thereafter, using DMo-501 manufactured by Kyowa Interface Science Co., Ltd., the contact angle of the cleaning agent compositions of each example and comparative example with respect to SPCC after 20 seconds was measured. The lower the contact angle, the higher the wettability, the less the residual water amount after cleaning, and the higher the water repellency, so the more excellent the drying property. If this contact angle is 10° or less, it can be said that the drying property at normal temperature is excellent, so this was set as the evaluation criterion.

[0260] [Drying test]

[0261] After degreasing and cleaning SPCC (size 50×20×0.8 mm) with acetone, it was dried by blowing air. Thereafter, it was immersed in the cleaning agent compositions of each example and comparative example at room temperature (25°C) for 20 seconds and then taken out, and the board was left standing upright. The time until the upper part (50%) area of the front side of the SPCC left standing upright at room temperature (25°C) was dried was measured. The shorter the time, the more excellent the drying property, and if this time is 140 seconds or less, it is considered that the drying property at normal temperature is excellent.

[0262] The evaluation results are shown in Tables 1 to 3.

[0263] [Table 1]

[0264]

[0265] [Table 2]

[0266]

[0267] [Table 3]

[0268]

Claims

1. A cleaning agent composition for metal articles, comprising: An amine represented by the general formula (I), i.e., component A: In general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group or a hydroxypropyl group, and R 3 is a hydroxyethyl group or a hydroxypropyl group; A nonionic surfactant represented by the general formula (II), i.e., component B: R 4 -O-{(EO)n 1 / (PO)m 1}-H (II) In general formula (II), R 4 is an alkyl group having 12 or more and 16 or less carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average number of moles of addition of EO, m 1 is the average number of moles of addition of PO, n 1 is a number of 2 or more and 20 or less, m 1 is a number of 0 or more and 20 or less, and the addition mode of PO and EO in {} is optionally either random arrangement or block arrangement; A nitrogen-containing nonionic surfactant represented by the general formula (III), i.e., component C: In general formula (III), R 5 is an alkyl or cycloalkyl group having an average carbon number of 8 or more and 18 or less, EO is an oxyethylene group, PO is an oxypropylene group, and n 2 is the average number of moles of addition of EO, and m 2 is the average number of moles of addition of PO. n 2 is a number of 1 or more and 8 or less, and m 2 is a number of 0 or more and 8 or less. The addition mode of PO and EO in {} can be arbitrarily selected from random arrangement and block arrangement; and Water, i.e., component D, with a pH of 7.1 or higher.

2. The cleaning agent composition for metal articles according to claim 1, wherein the HLB of component B based on the Griffin method is 3.6 or higher and 5.6 or lower.

3. The cleaning agent composition for metal articles according to claim 1 or 2, wherein In the general formula (II), R 4 is a secondary alkyl group having 12 or more and 16 or less carbon atoms.

4. The cleaning agent composition for metal articles according to any one of claims 1 to 3, wherein the content of component A is 0.01% by mass or higher and 1.0% by mass or lower, the content of component B is 0.001% by mass or higher and 1.5% by mass or lower, and the content of component C is 0.001% by mass or higher and 1.5% by mass or lower.

5. The cleaning agent composition for metal articles according to any one of claims 1 to 4, which contains component E', where component E' is a salt of component E and the amine, i.e., component A, and component E is a dicarboxylic acid represented by the general formula (IV) HOOC-R 6 -COOH (IV) In general formula (IV), R 6 is an alkylene group having 10 or more and 12 or less carbon atoms.

6. The cleaning agent composition for metal articles according to any one of claims 1 to 5, wherein the mass ratio of component B to component C, i.e., the mass of component B / the mass of component C, is 0.001 or higher and 100 or lower.

7. The cleaning agent composition for metal articles according to any one of claims 1 to 6, which contains an antifoaming agent.

8. The cleaning agent composition for metal articles according to any one of claims 1 to 7, wherein the content of water is 75% by mass or higher and 99.97% by mass or lower.

9. A method for cleaning metal articles, comprising a cleaning step of cleaning metal articles using the cleaning agent composition for metal articles according to any one of claims 1 to 8.

10. The method for cleaning metal articles according to claim 9, wherein the cleaning temperature in the cleaning step is 10°C or higher and 30°C or lower.

11. The method for cleaning metal articles according to claim 9 or 10, wherein after the cleaning step, there is a drying step of drying the metal articles with the cleaning agent composition for metal articles attached to their surfaces.

12. The method for cleaning metal articles according to claim 11, wherein the drying step is a drying step of drying the metal articles while removing the remaining cleaning agent composition for metal articles attached to the metal articles by blowing air.

13. The method for cleaning metal articles according to claim 11 or 12, wherein the drying temperature in the drying step is 10°C or higher and 30°C or lower.

14. A processing oil remover composition for metal articles, comprising: An amine represented by the general formula (I), i.e., component A: In general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group or a hydroxypropyl group, and R 3 is a hydroxyethyl group or a hydroxypropyl group; A nonionic surfactant represented by the general formula (II), i.e., component B: R 4 -O-{(EO)n 1 / (PO)m 1}-H (II) In general formula (II), R 4 is an alkyl group having 12 or more and 16 or less carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, n 1 is the average number of moles of addition of EO, m 1 is the average number of moles of addition of PO, n 1 is a number of 2 or more and 20 or less, m 1 is a number of 0 or more and 20 or less, and the addition mode of PO and EO in {} is optionally either random arrangement or block arrangement; A nitrogen-containing nonionic surfactant represented by the general formula (III), i.e., component C: In general formula (III), R 5 is an alkyl or cycloalkyl group having an average carbon number of 8 or more and 18 or less, EO is an oxyethylene group, PO is an oxypropylene group, and n 2 is the average molar number of addition of EO, and m 2 is the average molar number of addition of PO. n 2 is a number of 1 or more and 8 or less, and m 2 is a number of 0 or more and 8 or less. The addition mode of PO and EO within {} can be arbitrarily selected from either random arrangement or block arrangement; and Water, i.e., component D, The pH is 7.1 or higher.

15. A method for removing a processing oil from a metal article, which comprises a removing step of removing, from the metal article, the processing oil attached to the metal article during the production of the metal article, using the processing oil removing agent composition for metal articles according to claim 14.

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