Detergent composition for non-ferrous metals

Abstract

To provide a detergent composition for non-ferrous metal or the like which can suppress precipitation of a metal soap of an aliphatic carboxylic acid even when dilution water having a high hardness is used without use of a sequestering agent which is a persistent compound, suppressing reduction in antirust effect, and a method for washing the non-ferrous metal or the like using the detergent composition for the non-ferrous metal or the like.SOLUTION: A detergent composition for non-ferrous metal or the like includes: a compound (component A) represented by the following general formula (I) R1-COOM (I) (in the general formula (I), R1 represents an 11-21C linear or branched alkyl or alkenyl group and M represents a cation or a hydrogen atom); a nonionic surfactant (component B) represented by the following general formula (II) R2-O-{(EO)n / (PO)m}-H (II) (in the general formula (II), R2 is a 16-21C alkyl group or a 16-21C alkenyl group, EO is an ethyleneoxy group, PO is propyleneoxy group, n is an average addition mole number of the EO, m is an average addition mole number of the PO, n is the number of 2 to 20, m is the number of 0 to 20, and an addition form of the PO and EO in {} may be either a random sequence or a block sequence); and water (component C).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cleaning composition for non-ferrous metals and the like, and a method for cleaning members using the cleaning composition for non-ferrous metals and the like. [Background technology]

[0002] Non-ferrous metals such as aluminum and alloys of these non-ferrous metals (hereinafter, in this specification, non-ferrous metals such as aluminum and alloys of these non-ferrous metals are collectively referred to as "non-ferrous metals, etc.") are processed and used in industrial products in a variety of fields.

[0003] The non-ferrous metals and the like are cleaned with various detergent compositions to remove processing oils, processing debris, and the like adhering to the surfaces of the non-ferrous metals and the like during or after processing. However, since the non-ferrous metals and the like are prone to discoloration due to corrosion and prone to poor appearance, the detergent compositions may contain rust inhibitors to prevent the corrosion.

[0004] There is a technology that uses an aliphatic carboxylic acid as a corrosion-inhibiting component for metal parts, etc. For example, Patent Document 1 describes a detergent composition for metal products that has high rust prevention properties and wastewater treatment (biological treatment) properties as well as high cleaning properties (degreasing properties), and is characterized by containing an amine soap of a vegetable fatty acid containing at least one of oleic acid and linoleic acid, a polyoxyethylene-based nonionic surfactant, a glycol ether-based water-soluble organic solvent, a sequestering agent, a dibasic fatty acid amine soap, and water, and specifically describes, as an example, a detergent composition containing tall oil fatty acid amine soap, polyethylene glycol para-isooctylphenyl ether, dipropylene glycol monomethyl ether, ethylenediaminetetraacetic acid, a dibasic fatty acid amine soap, and water.

[0005] Patent Document 2 describes a detergent composition for non-ferrous metals, etc., which is highly safe and has a high cleaning effect, can impart rust prevention to ferrous metal parts, and does not corrode non-ferrous metal parts, and is adjusted to a pH of 5 to 10 using a nonionic surfactant, an aliphatic carboxylic acid, an aromatic carboxylic acid, and an organic alkali. As an example, the document specifically describes a detergent composition containing polyoxyethylene polyoxypropylene 2-ethylhexyl ether, oleic acid, p-toluic acid, N-methylethanolamine, and water.

[0006] Furthermore, Patent Document 3 describes a detergent composition for metal articles, which has excellent detergency and metal corrosion inhibition performance, and is characterized by containing an amine, a dicarboxylic acid amine salt, a monocarboxylic acid amine salt, a specific nonionic surfactant, and water. In the examples, the document specifically describes a detergent composition containing triethanolamine, 1,10-decanedicarboxylic acid triethanolamine salt, oleic acid triethanolamine salt, a nonionic surfactant obtained by adding propylene oxide (4.5 mol) to polyethylene glycol (7) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether, and water. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 7-268674 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-213266 [Patent Document 3] Japanese Patent Publication No. 2020-117644 Summary of the Invention [Problem to be solved by the invention]

[0008] From the viewpoint of economy, the detergent composition is transported and stored in the form of a concentrated liquid or concentrated powder, and is diluted to an appropriate concentration with dilution water such as city water or industrial water before use. If the dilution water has high hardness, the aliphatic carboxylic acid in the detergent composition may form metal soap and precipitate, preventing the detergent composition from exhibiting sufficient rust prevention effects. Furthermore, the precipitated metal soap may aggregate and / or precipitate, affecting the operational stability of the cleaning equipment. Typical hardness components that may be contained in the dilution water include calcium ions and magnesium ions.

[0009] To address this issue, the detergent composition for metal products described in Patent Document 1 contains a sequestering agent to soften hard water and inhibit the conversion of aliphatic carboxylic acids to metal soaps. However, since ethylenediaminetetraacetic acid, which is specifically described in Patent Document 1, is a compound that is difficult to decompose, it is desirable to avoid using ethylenediaminetetraacetic acid.

[0010] The present invention has been made in view of the above circumstances, and aims to provide a detergent composition for non-ferrous metals, etc., which can suppress deposition of aliphatic carboxylic acid metal soaps and suppress deterioration of rust-preventing effect even when high-hardness dilution water is used, without using a sequestering agent, which is a persistent compound, and a method for cleaning non-ferrous metals, etc., using the detergent composition for non-ferrous metals, etc. [Means for solving the problem]

[0011] The present invention provides A compound (component A) represented by the following general formula (I): R 1 -COOM (I) (In general formula (I), R 1 represents a linear or branched alkyl or alkenyl group having 11 to 21 carbon atoms, and M represents a cation or a hydrogen atom. A nonionic surfactant (component B) represented by the following general formula (II), and R 2 -O-{(EO)n / (PO)m}-H (II) (In general formula (II), R 2represents an alkyl group having 16 to 21 carbon atoms or an alkenyl group having 16 to 21 carbon atoms, EO represents an ethyleneoxy group, and PO represents a propyleneoxy group; n represents the average number of moles of EO added, m represents the average number of moles of PO added, n represents a number of 2 to 20, and m represents a number of 0 to 20, and the addition form of PO and EO in {} may be either a random arrangement or a block arrangement. This is a cleaning composition for non-ferrous metals, etc., which contains water (ingredient C).

[0012] The present invention also provides a method for cleaning a component, comprising a cleaning step of cleaning a component having non-ferrous metals or the like with the above-mentioned detergent composition for non-ferrous metals or the like. [Effects of the Invention]

[0013] The present invention can provide a detergent composition for non-ferrous metals, etc., which can suppress deposition of aliphatic carboxylic acid metal soap and suppress deterioration of rust-preventing effect even when high-hardness dilution water is used, without using a sequestering agent, which is a persistent compound; and a method for cleaning non-ferrous metals, etc., using the detergent composition for non-ferrous metals, etc. DETAILED DESCRIPTION OF THE INVENTION

[0014] <Cleaning composition for non-ferrous metals, etc.> The cleaning composition for non-ferrous metals etc. of the present embodiment comprises: A compound (component A) represented by the following general formula (I): R 1 -COOM (I) (In general formula (I), R 1 represents a linear or branched alkyl or alkenyl group having 11 to 21 carbon atoms, and M represents a cation or a hydrogen atom. A nonionic surfactant (component B) represented by the following general formula (II), and R 2 -O-{(EO)n / (PO)m}-H (II) (In general formula (II), R 2represents an alkyl group having 16 to 21 carbon atoms or an alkenyl group having 16 to 21 carbon atoms, EO represents an ethyleneoxy group, and PO represents a propyleneoxy group; n represents the average number of moles of EO added, m represents the average number of moles of PO added, n represents a number of 2 to 20, and m represents a number of 0 to 20, and the addition form of PO and EO in {} may be either a random arrangement or a block arrangement. The detergent composition for non-ferrous metals of this embodiment contains water (component C). The detergent composition for non-ferrous metals of this embodiment can suppress the deposition of aliphatic carboxylic acid metal soaps and prevent a decrease in rust prevention effect, even when high-hardness dilution water is used, without using a sequestering agent, which is a persistent compound. The reason why the detergent composition for non-ferrous metals of this embodiment exhibits such effects is not clear, but is thought to be as follows.

[0015] It is presumed that the detergent composition for non-ferrous metals of this embodiment contains a hardness component, and even if the hardness component forms a metal soap together with component A, component B disperses the metal soap, thereby preventing the metal soap from depositing. Furthermore, component B is present together with component A on the surface of the non-ferrous metal after cleaning. Component B has a long-chain alkyl group, which imparts hydrophobicity to the surface, allowing a stable anti-rust film to be formed without inhibiting the effect of component A, thereby providing good anti-rust effects. It is presumed that this allows both stability in high-hardness cleaning solutions and anti-rust effects to be achieved.

[0016] [Compound represented by general formula (I) (Component A)] The detergent composition for non-ferrous metals of this embodiment contains the compound represented by the general formula (I) from the viewpoint of inhibiting corrosion of non-ferrous metals after cleaning. In this specification, the compound represented by the general formula (I) may be referred to as component A. In the general formula (I), R 1is a linear or branched alkyl or alkenyl group having from 11 to 21 carbon atoms, preferably an alkyl or alkenyl group having from 12 to 18 carbon atoms, and more preferably an alkyl or alkenyl group having 18 carbon atoms. Examples of component A include saturated fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, arachidic acid, and behenic acid, or salts thereof; and unsaturated fatty acids such as palmitoleic acid, oleic acid, elaidic acid, cetoleic acid, erucic acid, brassidic acid, linoleic acid, linolenic acid, arachidonic acid, and stearic acid, or salts thereof. From the viewpoint of inhibiting corrosion after cleaning of non-ferrous metals, component A is preferably one or more selected from the group consisting of lauric acid, myristic acid, linoleic acid, oleic acid, and isostearic acid, or a salt thereof, and more preferably one or more selected from the group consisting of isostearic acid and oleic acid, or a salt thereof.

[0017] In the general formula (I), M is preferably an alkali metal ion, an ammonium ion, or a hydrogen atom, and more preferably a hydrogen atom.

[0018] The content of Component A in the detergent composition for non-ferrous metals, etc. is preferably 0.005% by mass or more, and more preferably 0.01% by mass or more, from the viewpoint of suppressing corrosion of non-ferrous metals, etc. after cleaning, and is preferably 0.5% by mass or less, and more preferably 0.3% by mass or less, from the viewpoint of economy.

[0019] [Compound represented by general formula (II) (Component B)] The detergent composition for non-ferrous metals of this embodiment contains the compound represented by general formula (II) from the viewpoint of inhibiting deposition of a hardness component and the metal soap of Component A. In this specification, the compound represented by general formula (II) may be referred to as Component B.

[0020] In the general formula (II), R 2is an alkyl group having 16 or more carbon atoms, preferably 18 or more carbon atoms, from the viewpoint of inhibiting deposition of the hardness component and the metal soap of Component A, and 21 or less carbon atoms, preferably 18 or less carbon atoms, from the viewpoint of inhibiting deposition of Component B, or an alkenyl group having 16 or more carbon atoms, preferably 18 or more carbon atoms, from the viewpoint of inhibiting deposition of the hardness component and the metal soap of Component A, and 21 or less carbon atoms, preferably 18 or less carbon atoms, from the viewpoint of inhibiting deposition of Component B. 2 R may be a straight chain or a branched chain, but is preferably a straight chain. 2 Specific examples of the group include at least one selected from a cetyl group, a stearyl group, and an oleyl group.

[0021] In the general formula (II), n is 2 or more, preferably 3 or more, more preferably 4 or more, and 20 or less, preferably 15 or less, more preferably 10 or less, and even more preferably 9 or less, from the viewpoint of improving cleanability and suppressing corrosion of non-ferrous metals such as iron and aluminum after cleaning. Also, in the general formula (II), m is 0 or more and 20 or less, preferably 10 or less, more preferably 5 or less, and even more preferably 1 or less, from the same viewpoint. Also, from the viewpoint of improving cleanability, the value of n is preferably larger than the value of m.

[0022] The content of Component B in the detergent composition for non-ferrous metals, etc. is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, from the viewpoint of inhibiting deposition of the hardness component and the metal soap of Component A, and is preferably 0.2% by mass or less, more preferably 0.1% by mass or less, from the viewpoint of inhibiting corrosion of non-ferrous metals, etc. after cleaning.

[0023] The mass ratio of component B to component A in the detergent composition for non-ferrous metals, etc. (mass of component B / mass of component A) is preferably 0.1 or more, more preferably 0.2 or more, and even more preferably 0.4 or more, from the viewpoint of suppressing deposition of hardness components and metal soap of component A, and is preferably 10 or less, more preferably 4 or less, and even more preferably 2 or less, from the viewpoint of suppressing corrosion after cleaning of non-ferrous metals, etc.

[0024] [Water (component C)] The cleaning composition for non-ferrous metals, etc. contains water. In this specification, water may be referred to as component C. Component C can be industrial water, tap water, deionized water, or the like. From the viewpoints of supplyability and cost, industrial water is preferred, and from the viewpoint of cleaning performance, ion-exchanged water is preferred. The content of component C in the cleaning composition for non-ferrous metals, etc. may be the balance of component A, component B, and other components described below. Specifically, the content of component C is preferably 95% by mass or more, more preferably 98% by mass or more and 99.95% by mass or less.

[0025] [Other ingredients] The detergent composition for non-ferrous metals, etc. may contain components other than Component A, Component B, and Component C to the extent that the effects of the present invention are not affected. Examples of components other than Component A, Component B, and Component C include amines represented by the following general formula (III), pH adjusters such as acids and alkalis, solubilizers, dispersants, thickeners such as thickeners, antifoaming agents, preservatives, and colorants. In addition, it is preferable that the detergent composition for non-ferrous metals, etc. does not contain a sequestering agent such as ethylenediaminetetraacetic acid, which is difficult to decompose.

[0026] [Amine represented by general formula (III) (component D)] The detergent composition for non-ferrous metals, etc., further contains an amine represented by the following general formula (III) from the viewpoint of suppressing corrosion after cleaning of non-ferrous metals, etc. In this specification, the amine represented by the following general formula (III) may be referred to as component D.

[0027] [ka] (In general formula (III), 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.

[0028] Examples of component D include alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine, as well as alkylated and aminoalkylated products thereof. From the viewpoint of improving cleaning properties and suppressing corrosion after cleaning of non-ferrous metals, etc., component D may include 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-phenyldiethanol ... At least one selected from ethanolamine, N-phenyldiisopropanolamine, N-benzyldiethanolamine, N-benzyldiisopropanolamine, triethanolamine, N-(β-aminoethyl)monoethanolamine, N-(β-aminoethyl)monoisopropanolamine, N-(β-aminoethyl)diethanolamine, and N-(β-aminoethyl)diisopropanolamine is preferred, at least one selected from monoethanolamine, monoisopropanolamine, diethanolamine, N-methylmonoethanolamine, N-dimethylmonoethanolamine, N-ethylmonoethanolamine, triethanolamine, and N-(β-aminoethyl)monoethanolamine is more preferred, and at least one selected from monoethanolamine, diethanolamine, and triethanolamine is even more preferred.

[0029] The content of component D in the detergent composition for non-ferrous metals, etc. is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more, from the viewpoint of suppressing corrosion of non-ferrous metals, etc. after cleaning, and is preferably 1.0% by mass or less, and more preferably 0.7% by mass or less, from the viewpoint of reducing damage to the object to be cleaned.

[0030] The mass ratio of the component D to the component A (mass of the component D / mass of the component A) in the detergent composition for non-ferrous metals, etc. is preferably 0.1 or more, more preferably 0.2 or more, and even more preferably 0.4 or more, from the viewpoint of suppressing corrosion of non-ferrous metals, etc. after cleaning; and is preferably 10 or less, more preferably 4 or less, and even more preferably 2 or less, from the viewpoint of reducing damage to the object to be cleaned.

[0031] The pH of the detergent composition for non-ferrous metals, etc. is preferably 4 or higher, more preferably 6 or higher, and even more preferably 8 or higher, from the viewpoint of reducing damage to the object to be cleaned, and is preferably 10 or lower, more preferably 9.5 or lower, and even more preferably 9 or lower, from the viewpoint of safety against chemical burns, etc.

[0032] [Method for producing a cleaning composition for non-ferrous metals, etc.] The detergent composition for non-ferrous metals, etc. can be produced by blending the above-mentioned components by a known method. The term "blending" as used herein includes mixing the above-mentioned components simultaneously or in any order.

[0033] [Concentrate of cleaning composition for non-ferrous metals, etc.] The detergent composition for non-ferrous metals, etc. may be prepared as a concentrate by reducing the amount of water in component E to the extent that separation, precipitation, etc. do not occur and storage stability is not impaired. The concentrate of the detergent composition for non-ferrous metals, etc. is preferably a concentrate diluted 3 times or more from the viewpoint of transportation and storage, and is preferably a concentrate diluted 30 times or less from the viewpoint of storage stability. The concentrate of the detergent composition for non-ferrous metals, etc. can be used by diluting it with water so that each component has the above-mentioned content (i.e., the content at the time of cleaning) at the time of use. Furthermore, the concentrate of the detergent composition for non-ferrous metals, etc. can also be used by adding each component separately at the time of use. In the present disclosure, "at the time of use" or "at the time of cleaning" of a concentrated solution of the detergent composition for non-ferrous metals, etc. refers to the diluted state of the concentrate of the detergent composition for non-ferrous metals, etc.

[0034] <How to clean components> The method for cleaning a component of the present embodiment includes a cleaning step of cleaning a component containing non-ferrous metals or the like with the detergent composition for non-ferrous metals or the like.

[0035] In the cleaning step, examples of a method for cleaning the components containing non-ferrous metals or the like with the cleaning composition for non-ferrous metals or the like include continuous cleaning, that is, a cleaning method in which the cleaning composition for non-ferrous metals or the like is brought into contact with the components by immersion cleaning, spray cleaning, brush cleaning, electrolytic cleaning, or the like.

[0036] The cleaning method may include, for example, a drying step of removing excess of the cleaning composition for non-ferrous metals, etc., adhering to the member by air purging or the like after the cleaning step, and drying the member.

[0037] The cleaning method may include a rinsing step of rinsing the member having non-ferrous metals or the like with water or the like after the cleaning step and before the drying step, but it is preferable not to include a rinsing step immediately after the cleaning step from the viewpoint of suppressing corrosion after cleaning of the non-ferrous metals or the like. Therefore, the cleaning composition for non-ferrous metals or the like can be used as a no-rinse type cleaning composition for non-ferrous metals or the like. [Example]

[0038] <Preparation of cleaning composition for non-ferrous metals, etc.> Detergent compositions for non-ferrous metals and the like according to the examples and comparative examples were obtained by adjusting the compositions to those shown in Table 1 or 2. The meanings of the symbols in each table are as follows.

[0039] [Component A] Lauric acid [Wako First Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.] Myristic acid [Wako Special Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.] Linoleic acid [Wako First Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.] Oleic acid [Wako Grade 1, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.] Isostearic acid [Kyoto Alcohol Industry Co., Ltd.]

[0040] [Component B] Polyethylene glycol (8) cetyl ether [Aoki Oil & Fat Industries Co., Ltd., Brownon CH308] Polyethylene glycol (4) oleyl ether [Aoki Oil & Fat Industries Co., Ltd., Brownon EN1504] Polyethylene glycol (9) oleyl ether [Aoki Oil & Fat Industries Co., Ltd., Brownon EN1509] Polyethylene glycol (13.5) oleyl ether [Aoki Oil & Fat Industries Co., Ltd., Brownon EN1513.5] Polyethylene glycol (15.0) stearyl ether [Aoki Oil & Fat Industries Co., Ltd., Brownon SR715]

[0041] [Non-ingredient B] Polyethylene glycol (5) tridecyl ether [Finesurf TD-50, manufactured by Aoki Oil & Fat Industries Co., Ltd.] Polyoxyethylene (10) octylphenyl ether [Fujifilm Wako Pure Chemical Industries, Ltd., biochemical grade] Polyethylene glycol (5) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether [Nippon Shokubai Co., Ltd., Softanol 50]

[0042] Nonionic surfactants 1, 2, and 3 in Table 2 were synthesized by the following methods.

[0043] [Synthesis example of nonionic surfactant 1] 2-Ethyl-1-hexanol (Wako Special Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) was charged into an autoclave, and after nitrogen substitution, the system was dehydrated under reduced pressure to reduce the water content in the system to 0.2% by mass or less. Ethylene oxide (12 moles) was added at 125°C and 0.3 MPa or less, and the mixture was aged to obtain an EO adduct. Next, propylene oxide (2 moles) was added at 125°C and 0.3 MPa or less, and the mixture was aged to obtain an EO-PO adduct. The obtained nonionic surfactant 1, when expressed by the general formula (II) above, is represented by R 2 : 2-ethylhexyl group, n: 12, m: 2.

[0044] [Synthesis example of nonionic surfactant 2] Lauryl alcohol (1 mole, "Kalcol 2098" manufactured by Kao Corporation) and a catalytic amount of potassium hydroxide (manufactured by Nacalai Tesque, Inc.) were charged into an autoclave, and after nitrogen substitution, the system was dehydrated under reduced pressure to reduce the water content in the system to 0.2 mass% or less. Ethylene oxide (6 moles) was added at 125°C and 0.3 MPa or less, and the mixture was aged to obtain an EO adduct. The obtained nonionic surfactant 2 is represented by formula (II): 2 : dodecyl group, n: 6, m: 0.

[0045] [Synthesis example of nonionic surfactant 3] Polyethylene glycol (7) alkyl (mixed secondary dodecyl and secondary tetradecyl) ether (1 mol, "SOFTANOL 70" manufactured by Nippon Shokubai Co., Ltd.) and a catalytic amount of potassium hydroxide (manufactured by Nacalai Tesque, Inc.) were charged into an autoclave, and after nitrogen substitution, the system was dehydrated under reduced pressure to reduce the water content in the system to 0.2 mass% or less. Propylene oxide (4.5 mol) was added at 125°C and 0.3 MPa or less, and the mixture was aged to obtain an EO-PO adduct (nonionic surfactant B11). The obtained nonionic surfactant 3, when expressed by the general formula (II) above, is represented by R 2 : dodecyl group or tetradecyl group, n: 7, m: 4.5.

[0046] [Component D] Monoethanolamine (MEA) [2-aminoethanol, special reagent grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.] Diethanolamine (DEA) [Fujifilm Wako Pure Chemical Industries, Ltd., 2,2'-iminodiethanol Wako First Grade] Triethanolamine (TEA) [2,2',2"-nitrilotriethanol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., Wako First Grade] N-methylethanolamine [Nippon Nyukazai Co., Ltd., amino alcohol MMA]

[0047] [Other ingredients] Dodecanedioic acid: [Wako Special Grade, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.] Sodium hydroxide: [Kanto Chemical Co., Ltd., special grade, solids content 48% by mass]

[0048] <Preparation of Cleaning Composition> The detergent compositions for non-ferrous metals etc. according to each Example or Comparative Example were prepared by the following procedure so that the content of each component shown in Table 1 or Table 2 was as shown in each table. The numerical values ​​showing the content of each component in Tables 1 and 2 represent the amount of active ingredient, and are expressed in mass%. Step 1: Water was added to a container, and each component was added and mixed by stirring to obtain a mixed solution. Step 2: The pH was the pH of the cleaning composition at 25°C, and the value was measured 3 minutes after immersing the electrode of a pH meter (HM-30G, manufactured by DKK-Toa Corporation) in the cleaning composition.

[0049] <Evaluation> [Rust prevention evaluation] [Evaluation when the concentration of hardness components in the cleaning composition for non-ferrous metals is 0 ppm] 100 g of each of the cleaning compositions for non-ferrous metals, etc. according to the Examples or Comparative Examples was mixed into a 100 mL glass beaker and heated to 60°C. An aluminum alloy plate (ADC12, 50 mm x 20 mm x 1.6 mm) that had been degreased and cleaned with acetone was immersed in the cleaning composition for non-ferrous metals, etc. for 30 seconds. The aluminum alloy plate was removed from the cleaning composition for non-ferrous metals, etc. and dried by air blowing without rinsing. The dried aluminum alloy plate was immersed in 50 g of ion-exchanged water heated to 60°C for 1 hour, and the amount of aluminum ions dissolved in the water after immersion was measured using an ICP optical emission spectrometer (Agilent 5110 ICP-OES). The amount of aluminum eluted per unit area (g / m ) was calculated from the measurement results and the surface area of ​​the aluminum alloy plate. 2 After the test, the surface of the aluminum alloy plate was visually observed and evaluated according to the following evaluation criteria. 4: 100-75% of the surface is blackened 3: 75-50% of the surface is blackened 2: 50-25% of the surface is blackened 1: 25-0% of the surface is blackened

[0050] [Evaluation when the concentration of hardness components (calcium ions or magnesium ions) in the detergent composition for non-ferrous metals is 100 ppm] Calcium chloride or magnesium chloride was added to 100 ml of each cleaning composition for non-ferrous metals, etc., according to each Example or Comparative Example so that the calcium ion or magnesium ion hardness component was 100 ppm, and the composition was allowed to stand at 60°C for 24 hours, and the rust prevention properties were evaluated in the same manner as in the evaluation above.

[0051] [Metal soap deposition inhibition evaluation] Calcium chloride or magnesium chloride was added to 100 ml of each of the cleaning compositions for non-ferrous metals according to the examples or comparative examples so that the calcium ion or magnesium ion hardness component was 100 ppm, and the composition was allowed to stand at 60°C. After 24 hours and 48 hours, the appearance of the cleaning composition for non-ferrous metals was checked for the presence or absence of precipitation of metal soap.

[0052] The results of each of the above evaluations are shown in the tables.

[0053] Table 1

[0054] Table 2

Claims

1. A compound (component A) represented by the following general formula (I): R １ -COOM(I) (In general formula (I), R １ represents a linear or branched alkyl or alkenyl group having 11 to 21 carbon atoms, and M represents a cation or a hydrogen atom. A nonionic surfactant (component B) represented by the following general formula (II), and 2 ２ -O{(EO)n / (O)m}mｨ(99) (In general formula (II), R ２ represents an alkyl group having from 16 to 21 carbon atoms or an alkenyl group having from 16 to 21 carbon atoms, EO represents an ethyleneoxy group, PO represents a propyleneoxy group, n represents the average number of moles of EO added, m represents the average number of moles of PO added, n represents a number of from 2 to 20, m represents a number of from 0 to 20, and the addition form of PO and EO in {} may be either a random arrangement or a block arrangement. Contains water (component C), a mass ratio of the component B to the component A (mass of the component B / mass of the component A) is 0.1 or more and 10 or less, The cleaning agent composition for non-ferrous metals and their alloys, wherein the content of the component A is 0.005% by mass or more and 0.5% by mass or less.

2. A cleaning agent composition for non-ferrous metals and their alloys as described in claim 1, wherein the content of component B is 0.01 mass % or more and 0.2 mass % or less.

3. 3. The cleaning composition for non-ferrous metals and their alloys according to claim 1 or 2, further comprising an amine (component D) represented by the following general formula (III): 【Chemistry 1】 (In general formula (III), 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.

4. 4. The cleaning agent composition for non-ferrous metals and their alloys according to claim 3, wherein a mass ratio of the component D to the component A (mass of the component D / mass of the component A) is 0.1 or more and 10 or less.

5. A method for cleaning a component, comprising: a cleaning step of cleaning a component containing a non-ferrous metal and its alloy with the detergent composition for non-ferrous metals and their alloys according to any one of claims 1 to 4.

6. The method for cleaning a member according to claim 5 , further comprising a drying step after the cleaning step.

7. The method for cleaning a member according to claim 6 , wherein a rinsing step is not performed after the cleaning step and before the drying step.

8. 8. The method for cleaning a member according to claim 5, wherein the non-ferrous metal or its alloy is aluminum or an aluminum alloy.

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