Rust inhibitor composition

Abstract

This invention relates to a rust inhibitor composition comprising an amine (component A) with a molecular weight of 30 or more and 140 or less, as shown in general formula (I), a salt formed by a dicarboxylic acid (component B) having 6 or more and 22 or less carbon atoms and said component A (component B'), a salt formed by a monocarboxylic acid (component C) having 8 or more and 22 or less carbon atoms and said component A (component C'), and water (component D). According to this invention, a rust inhibitor composition is provided that can suppress the decrease in the coefficient of friction of a metal surface caused by a rust-preventive film. In general formula (I), R... 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 It is a hydrocarbon group with 1 or more carbon atoms and less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.

Description

Technical Field

[0001] This invention relates to a rust inhibitor composition. Background Technology

[0002] Metals such as iron, copper, and aluminum are processed and used in industrial products in a wide variety of fields. Since metals are prone to rusting due to oxidation by oxygen in the air, the metal surfaces of articles with metal parts (hereinafter also referred to as "metal articles") are usually treated with rust-preventive treatments such as coating with rust-preventive oil or other oil-based rust inhibitors (e.g., Japanese Patent Application Publication No. 2020-164987). Summary of the Invention

[0003] The present invention is a rust inhibitor composition comprising an amine (component A) with a molecular weight of 30 or more and 140 or less as shown in the following general formula (I), a dicarboxylic acid (component B) with 6 or more and 22 or less carbon atoms and a salt of the above component A (component B'), a monocarboxylic acid (component C) with 8 or more and 22 or less carbon atoms and a salt of the above component A (component C'), and water (component D).

[0004] [Chemistry 1]

[0005]

[0006] (In the above general formula (I), R) 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 (A hydrocarbon group having 1 or more but less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.)

[0007] In addition, the present invention is a rust inhibitor composition, which is made by combining an amine (component A) with a molecular weight of 30 or more and 140 or less as shown in the above general formula (I), a dicarboxylic acid (component B) with 6 or more and 22 or less carbon atoms, a monocarboxylic acid (component C) having a hydrocarbon group with 7 or more and 21 or less carbon atoms, and water (component D).

[0008] In addition, the present invention is a method for manufacturing an article, which includes a rust prevention process in which a rust-preventive film derived from the rust inhibitor composition is formed on the metal surface of the aforementioned metal article.

[0009] In addition, the present invention is a method for preventing rust on an article, which includes a rust prevention process in which a rust-preventive film derived from the rust inhibitor composition is formed on the metal surface of the aforementioned metal article. Detailed Implementation

[0010] Generally speaking, oil-based rust inhibitors have high rust-preventing performance. However, before the work is carried out on metal articles that have been treated with oil-based rust inhibitors, the unwanted oil-based rust inhibitor needs to be removed from the metal surface of the metal article, which will increase the number of work steps. This is because oil-based rust inhibitors have high rust-preventing performance.

[0011] To address this issue, water-based rust inhibitors can be considered, as they form a rust-preventive film that does not need to be removed before subsequent processing. When metal articles are treated with water-based rust inhibitor compositions, sometimes the rust-preventive film from the composition is left on the surface of the metal article before subsequent processes such as assembly. However, in such cases, the rust-preventive film reduces the coefficient of friction on the metal article's surface, potentially causing problems such as loosening or abnormal tightening of bolts, nuts, and other fasteners used to secure the metal article.

[0012] In addition, considering the ease of transporting, storing and using the rust inhibitor composition used to form the rust-preventive film, it is important that the composition has stability.

[0013] The objective of this invention is to provide a rust inhibitor composition capable of suppressing the reduction of the coefficient of friction of a metal surface caused by a rust-preventive film, a method for manufacturing an article, and a method for preventing rust on an article.

[0014] The present invention is a rust inhibitor composition comprising an amine (component A) with a molecular weight of 30 or more and 140 or less as shown in the following general formula (I), a dicarboxylic acid (component B) with 6 or more and 22 or less carbon atoms and a salt of the above component A (component B'), a monocarboxylic acid (component C) with 8 or more and 22 or less carbon atoms and a salt of the above component A (component C'), and water (component D).

[0015] [Chemistry 2]

[0016]

[0017] (In the above general formula (I), R) 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 (A hydrocarbon group having 1 or more but less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.)

[0018] In addition, the present invention is a rust inhibitor composition, which is made by combining an amine (component A) with a molecular weight of 30 or more and 140 or less as shown in the above general formula (I), a dicarboxylic acid (component B) with 6 or more and 22 or less carbon atoms, a monocarboxylic acid (component C) having a hydrocarbon group with 7 or more and 21 or less carbon atoms, and water (component D).

[0019] In addition, the present invention is a method for manufacturing an article, which includes a rust prevention step of forming a rust-preventive film derived from the rust inhibitor composition on the metal surface of the aforementioned metal article.

[0020] In addition, the present invention is a method for preventing rust on an article, which includes a rust prevention process of forming a rust-preventive film derived from the rust inhibitor composition on the metal surface of the aforementioned metal article.

[0021] According to the present invention, a rust inhibitor composition that can suppress the reduction of the coefficient of friction of a metal surface caused by the rust-preventive film, a method for manufacturing an article, and a method for preventing rust on an article can be provided. Detailed Implementation

[0022] Hereinafter, one embodiment of the present invention will be described.

[0023] <Rust Inhibitor Composition>

[0024] The rust inhibitor composition of this embodiment contains an amine (component A) with a molecular weight of 30 or more and 140 or less as shown in the following general formula (I), a dicarboxylic acid (component B) with 6 or more and 22 or less carbon atoms and a salt of the above-mentioned component A (component B'), a monocarboxylic acid (component C) with 8 or more and 22 or less carbon atoms and a salt of the above-mentioned component A (component C'), and water (component D).

[0025] [Chemistry 3]

[0026]

[0027] (In the above general formula (I), R) 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 (A hydrocarbon group having 1 or more but less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.)

[0028] The rust inhibitor composition of this embodiment can suppress the decrease in the coefficient of friction of the metal surface caused by the rust inhibitor film. The reason why the above-described rust inhibitor composition achieves this effect is uncertain; however, it can be speculated that the salt of the dicarboxylic acid (component B) and the amine (component A) (component B') and the salt of the monocarboxylic acid (component C) and the amine (component A) (component C') act on iron, while the salt of the monocarboxylic acid (component C) and the amine (component A) (component C') acts on non-ferrous metals such as aluminum and copper, thereby suppressing the decrease in the coefficient of friction of the metal surface caused by the rust inhibitor film.

[0029] [Amine (component A)]

[0030] The above-mentioned rust inhibitor composition contains an amine (component A) with a molecular weight of 30 or more and 140 or less as shown in the above general formula (I).

[0031] Regarding the molecular weight of the amine (component A), from the viewpoint of suppressing the decrease in the coefficient of friction of the metal surface caused by the anti-rust film from the rust inhibitor composition, it is 140 or less, preferably 100 or less. Regarding the molecular weight of the amine (component A), from the viewpoint of suppressing the odor of the amine, it is 30 or more, preferably 50 or more.

[0032] In the above general formula (I), R 1 It is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, and the hydrocarbon group has a hydroxyl or ether group. In the above general formula (I), R 1 Preferably, it is a hydrocarbon group having 1 or more and 20 or fewer carbon atoms and a hydroxyl group.

[0033] In the above general formula (I), regarding R 1 From the viewpoint of improving storage stability, the number of carbon atoms in the hydrocarbon group is 20 or less, preferably 10 or less, and more preferably 4 or less.

[0034] In the above general formula (I), R 2 It is a hydrocarbon group with 1 or more carbon atoms and less than 20 carbon atoms, or hydrogen, and the hydrocarbon group has a hydroxyl or ether group. In the above general formula (I), R 2 Preferably, it is a hydrocarbon group with 1 or more but less than 20 carbon atoms, or hydrogen.

[0035] In the above general formula (I), regarding R 2 From the viewpoint of improving storage stability, the number of carbon atoms in the hydrocarbon group is 20 or less, preferably 10 or less, and more preferably 4 or less.

[0036] Regarding the aforementioned amine (component A), from the viewpoint of improving the rust-preventive properties against metals, it is preferable to include at least one alkanolamine selected from the following: monoethanolamine, monoisopropanolamine, diethanolamine, diisopropanolamine, and at least one alkoxyalkylamine selected from 2-methoxyethylamine, 2-ethoxyethylamine, 2-isopropoxyethylamine, 2-isobutoxyethylamine, 2-tert-butoxyethylamine, 2-(2-ethylhexyloxy)ethylamine, 2-(2-butylhexyloxy)ethylamine, 2-decoxyethylamine, 2-dodecyloxyethylamine, 2-tetradecyloxyethylamine, 2-stearyloxyethylamine, 2-oleyloxyethylamine, 3-methoxypropylamine, 3-ethoxypropylamine, 3-isopropoxypropylamine, 3-isobutoxypropylamine, and 3-tert-butoxypropylamine; more preferably, it includes at least one aloxyalkylamine selected from monoethanolamine and diethanolamine.

[0037] Regarding the total content of alkanolamines and alkoxyalkylamines in the aforementioned amine (component A), from the viewpoint of improving the rust-preventive performance against metals, it is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and even more preferably substantially 100% by mass. It should be noted that, in this specification, the term "substantially 100% by mass" includes the unavoidable inclusion of trace amounts of impurities.

[0038] Regarding the total content of monoethanolamine and diethanolamine in the aforementioned amine (component A), from the viewpoint of improving the rust-preventive performance on metals, it is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and even more preferably substantially 100% by mass.

[0039] Regarding the content of the amine (component A) in the above-mentioned rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.3% by mass or more.

[0040] Regarding the content of the amine (component A) in the above-mentioned rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 50% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less. Regarding the content of the amine (component A) in the above-mentioned rust inhibitor composition, from the viewpoint of inhibiting surface deterioration of metal articles, it is preferably 4% by mass or less, more preferably 3.5% by mass or less, and even more preferably 3% by mass or less.

[0041] [Dicarboxylic acids with 6 or more carbon atoms and 22 or fewer carbon atoms (component B) and their salts (component B') of component A]

[0042] Regarding the carbon number of the aforementioned dicarboxylic acid (component B), from the viewpoint of improving the rust-preventive performance against metals, it is 6 or more, preferably 8 or more, more preferably 9 or more, and even more preferably 10 or more. Regarding the carbon number of the aforementioned dicarboxylic acid (component B), from the viewpoint of improving the rust-preventive performance against metals, it is 22 or less, preferably 18 or less, and even more preferably 14 or less.

[0043] The dicarboxylic acid (component B) described above is, for example, represented by the following general formula (II). The dicarboxylic acid (component B) described above can be used alone or in combination with two or more.

[0044] General formula (II): HOOC-R 3 -COOH

[0045] (In general formula (II), R) 3 (It is an alkylene group with 4 or more carbon atoms and less than 20 carbon atoms.)

[0046] Regarding the aforementioned dicarboxylic acid (component B), from the viewpoint of improving the rust-preventive properties against iron, it is preferable to include at least one of succinic acid, 1,8-octanoic acid, 1,10-sebacic acid, 1,11-undecanoic acid, and 1,12-dodecanoic acid, and more preferably 1,10-sebacic acid.

[0047] Regarding the total content of adipic acid, 1,8-octanoic acid, 1,10-sebacic acid, 1,11-undecanoic acid, and 1,12-dodecanoic acid in the aforementioned dicarboxylic acid (component B), from the viewpoint of improving the rust-preventive properties against iron, it is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and even more preferably substantially 100% by mass.

[0048] Regarding the content of 1,10-sebacic acid in the aforementioned dicarboxylic acid (component B), from the viewpoint of improving the rust-preventive performance against iron, it is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and even more preferably substantially 100% by mass.

[0049] Since the aforementioned dicarboxylic acid (component B) and the aforementioned amine (component A) form a salt in water, the aforementioned rust inhibitor composition substantially contains a salt (component B') of the aforementioned dicarboxylic acid (component B) and the aforementioned amine (component A). The salt (component B') of the aforementioned dicarboxylic acid (component B) and the aforementioned amine (component A) can be used alone or in combination with two or more. It should be noted that the salt (component B') of the aforementioned dicarboxylic acid (component B) and the aforementioned amine (component A) can also be prepared using a raw material that has been pre-formed into a salt, using that raw material to prepare the aforementioned rust inhibitor composition.

[0050] Regarding the content of component B' in the above-mentioned rust inhibitor composition, from the viewpoint of improving the rust prevention performance on metals, it is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more.

[0051] Regarding the content of component B' in the above-mentioned rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less. Regarding the content of component B' in the above-mentioned rust inhibitor composition, from the viewpoint of suppressing the decrease in the coefficient of friction of the metal surface caused by the rust-preventive film from the rust inhibitor composition, it is preferably 2% by mass or less, more preferably 1.8% by mass or less, even more preferably 1.5% by mass or less, and even more preferably 1% by mass or less.

[0052] Regarding the mass ratio of the amount of component A to the amount of component B in the above-mentioned rust inhibitor composition (amount of component B' / amount of component A), from the viewpoint of improving storage stability, it is preferably 0.01 or more, more preferably 0.05 or more, further preferably 0.1 or more, and even more preferably 0.15 or more. Regarding the mass ratio of the amount of component A to the amount of component B in the above-mentioned rust inhibitor composition (amount of component B / amount of component A), from the viewpoint of improving rust prevention performance against metals, it is preferably 2 or less, more preferably 1.5 or less, even more preferably 1 or less, and even more preferably 0.5 or less.

[0053] Regarding the mass ratio (content of component B' / content of component A) of the above-mentioned rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 0.01 or more, more preferably 0.1 or more, further preferably 0.15 or more, and even more preferably 0.2 or more. Regarding the mass ratio (content of component B' / content of component A) of the above-mentioned rust inhibitor composition, from the viewpoint of improving rust prevention performance against metals, it is preferably 2 or less, more preferably 1.5 or less, even more preferably 1 or less, and even more preferably 0.8 or less.

[0054] [A monocarboxylic acid with 8 or more carbon atoms and 22 or fewer carbon atoms (component C) and a salt of component A (component C')]

[0055] Regarding the carbon number of the aforementioned monocarboxylic acid (component C), from the viewpoint of improving the rust-preventive performance against metals, it is 8 or more, preferably 12 or more, more preferably 16 or more, and even more preferably 17 or more. Regarding the carbon number of the aforementioned monocarboxylic acid (component C), from the viewpoint of improving the rust-preventive performance against metals, it is 22 or less, preferably 20 or less, and more preferably 19 or less.

[0056] The above-mentioned monocarboxylic acid (component C) is, for example, represented by the following general formula (III). The above-mentioned monocarboxylic acid (component C) can be used alone or in combination with two or more.

[0057] General formula (III): R 4 -COOH

[0058] (In general formula (III), R) 4 (The alkyl or alkenyl group is either straight-chain or branched, with 7 or more carbon atoms and 21 or fewer. From the viewpoint of improving rust resistance to metals, straight-chain is preferred.)

[0059] Regarding the aforementioned monocarboxylic acid (component C), from the viewpoint of improving the rust-preventive properties against metals, it is preferable to include at least one of the following saturated fatty acids: lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, eicosanoic acid, behenic acid, etc.; and unsaturated fatty acids: palmitic acid, oleic acid, transoleic acid, icosenoic acid, sinapic acid, brassinolic acid, linoleic acid, linolenic acid, arachidonic acid, stearylene acid, etc. More preferably, it includes at least one of the following palmitic acid, stearic acid, isostearic acid, oleic acid, and linoleic acid. Even more preferably, it includes at least one of the following isostearic acid and oleic acid.

[0060] Regarding the total content of saturated and unsaturated fatty acids in the aforementioned monocarboxylic acid (component C), from the viewpoint of improving the rust-preventive performance against metals, it is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and even more preferably substantially 100% by mass.

[0061] Regarding the total content of palmitic acid, stearic acid, isostearic acid, oleic acid, and linoleic acid in the aforementioned monocarboxylic acid (component C), from the viewpoint of improving the rust-preventive performance on metals, it is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and even more preferably substantially 100% by mass.

[0062] Regarding the total content of isostearic acid and oleic acid in the aforementioned monocarboxylic acid (component C), from the viewpoint of improving the rust-preventive performance on metals, it is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and even more preferably substantially 100% by mass.

[0063] Since the aforementioned monocarboxylic acid (component C) and the aforementioned amine (component A) form a salt in water, the aforementioned rust inhibitor composition substantially contains a salt (component C') of the aforementioned monocarboxylic acid (component C) and the aforementioned amine (component A). The salt (component C') of the aforementioned monocarboxylic acid (component C) and the aforementioned amine (component A) can be used alone or in combination with two or more. It should be noted that the salt (component C') of the aforementioned monocarboxylic acid (component C) and the aforementioned amine (component A) can also be prepared using a raw material that has been pre-formed into a salt, using that raw material to prepare the aforementioned rust inhibitor composition.

[0064] Regarding the content of component C' in the above-mentioned rust inhibitor composition, from the viewpoint of improving the rust prevention performance on metals, it is preferably 0.1% by mass or more, more preferably 0.6% by mass or more, and even more preferably 0.9% by mass or more.

[0065] Regarding the content of component C' in the above-mentioned rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less. Regarding the content of component C' in the above-mentioned rust inhibitor composition, from the viewpoint of suppressing the decrease in the coefficient of friction of the metal surface caused by the rust-preventive film from the rust inhibitor composition, it is preferably 5% by mass or less, more preferably 4% by mass or less, and even more preferably 3% by mass or less.

[0066] Regarding the mass ratio (amount of component A / amount of component C) of the above-mentioned rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 0.01 or more, more preferably 0.1 or more, further preferably 0.5 or more, even more preferably 1 or more, and even more preferably 2 or more. Regarding the mass ratio (amount of component A / amount of component C) of the above-mentioned rust inhibitor composition, from the viewpoint of improving rust prevention performance against metals, it is preferably 10 or less, more preferably 8 or less, and even more preferably 7 or less.

[0067] Regarding the mass ratio (content of component A / content of component C') of the above-mentioned rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 0.01 or more, more preferably 0.05 or more, further preferably 0.1 or more, and even more preferably 0.15 or more. Regarding the mass ratio (content of component A / content of component C') of the above-mentioned rust inhibitor composition, from the viewpoint of improving rust prevention performance against metals, it is preferably 2 or less, more preferably 1.5 or less, even more preferably 1.3 or less, even more preferably 1.1 or less, and even more preferably 1 or less.

[0068] Regarding the mass ratio (amount of component B / amount of component C) of the rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 0.01 or more, more preferably 0.1 or more, and even more preferably 0.2 or more. Regarding the mass ratio (amount of component B / amount of component C) of the rust inhibitor composition, from the viewpoint of improving rust prevention performance against metals, it is preferably 2 or less, more preferably 1.5 or less, even more preferably 1 or less, and even more preferably 0.5 or less.

[0069] Regarding the mass ratio (content of component B' / content of component C') of the rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 0.1 or more, more preferably 0.2 or more. Regarding the mass ratio (content of component B' / content of component C') of the rust inhibitor composition, from the viewpoint of improving rust prevention performance against metals, it is preferably 2 or less, more preferably 1.4 or less, even more preferably 1.3 or less, even more preferably 1.1 or less, and even more preferably 0.5 or less.

[0070] [Water (Component D)]

[0071] Water (component D) can be industrial water, tap water, pure water, deionized water, and distilled water, etc. From the viewpoint of improving the rust prevention performance of metals, it is preferred to select at least one of pure water, deionized water, and distilled water, and more preferably pure water.

[0072] Regarding the content of component D in the above-mentioned rust inhibitor composition, from the viewpoint of improving storage stability, it is preferably 10% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more. Regarding the content of component D in the above-mentioned rust inhibitor composition, from the viewpoint of suppressing the decrease in the coefficient of friction of the metal surface caused by the rust-preventive film from the rust inhibitor composition, it is preferably 80% by mass or more, more preferably 85% by mass or more, and even more preferably 90% by mass or more.

[0073] Regarding the content of component D in the above-mentioned rust inhibitor composition, from the viewpoint of improving the rust prevention performance on metals, it is preferably 97% by mass or less, more preferably 96% by mass or less.

[0074] [Other ingredients]

[0075] The rust inhibitor composition described above may contain other components besides those commonly used as rust inhibitors, A to D, within a range that does not affect performance. Examples of such other components include, for instance, solubilizers, dispersants, thickeners, defoamers, preservatives, and colorants.

[0076] The above-described rust inhibitor composition can be manufactured by combining the above-described components using a known method. That is, the above-described rust inhibitor composition can be a rust inhibitor composition formed by combining the above-described components A, B, C, and D. It should be noted that the above-described "combination" includes mixing the above-described components simultaneously or in any order.

[0077] Regarding the amount of component A mentioned above, from the viewpoint of improving storage stability, it is preferably 0.5% by mass or more, more preferably 1% by mass or more, and even more preferably 1.5% by mass or more.

[0078] Regarding the amount of component A, from the viewpoint of improving storage stability, it is preferably 60% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less. Regarding the amount of component A, from the viewpoint of suppressing the decrease in the coefficient of friction of the metal surface caused by the anti-rust film from the rust inhibitor composition, it is preferably 5% by mass or less, more preferably 3.5% by mass or less, and even more preferably 3% by mass or less.

[0079] Regarding the amount of component B mentioned above, from the viewpoint of improving the rust prevention performance of metals, it is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.3% by mass or more.

[0080] Regarding the amount of component B, from the viewpoint of improving storage stability, it is preferably 10% by mass or less, more preferably 7% by mass or less, and even more preferably 5% by mass or less. Regarding the amount of component B, from the viewpoint of suppressing the decrease in the coefficient of friction of the metal surface caused by the anti-rust film from the rust inhibitor composition, it is preferably 1% by mass or less, more preferably 0.9% by mass or less, even more preferably 0.8% by mass or less, and even more preferably 0.5% by mass or less.

[0081] Regarding the amount of component C mentioned above, from the viewpoint of improving the rust prevention performance of metals, it is preferably 0.3% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.7% by mass or more, and even more preferably 1% by mass or more.

[0082] Regarding the amount of component C, from the viewpoint of improving storage stability, it is preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less. Regarding the amount of component C, from the viewpoint of suppressing the decrease in the coefficient of friction of the metal surface caused by the anti-rust film from the rust inhibitor composition, it is preferably 4% by mass or less, more preferably 3% by mass or less, and even more preferably 2.5% by mass or less.

[0083] Regarding the mass ratio of the amount of component C to the amount of component B (amount of component B / amount of component C), from the viewpoint of improving storage stability, it is preferably 0.1 or more, more preferably 0.15 or more, and even more preferably 0.2 or more. Regarding the mass ratio of the amount of component C to the amount of component B (amount of component B / amount of component C), from the viewpoint of improving rust prevention performance against metals, it is preferably 1.5 or less, more preferably 1 or less, even more preferably 0.8 or less, even more preferably 0.5 or less, and even more preferably 0.3 or less.

[0084] Regarding the amount of component D, from the viewpoint of improving storage stability, it is preferably 10% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more. Regarding the amount of component D, from the viewpoint of suppressing the decrease in the coefficient of friction of the metal surface caused by the anti-rust film from the rust inhibitor composition, it is preferably 80% by mass or more, more preferably 85% by mass or more, and even more preferably 90% by mass or more.

[0085] Regarding the amount of component D mentioned above, from the viewpoint of suppressing the decrease in the coefficient of friction of the metal surface caused by the anti-rust film from the rust inhibitor composition, it is preferably 97% by mass or less, and more preferably 96% by mass or less.

[0086] The above-described rust inhibitor composition may be combined with other components besides those A to D, which are commonly used as rust inhibitors, within a range that does not affect performance. Examples of such other components include, for instance, solubilizers, dispersants, thickeners, defoamers, preservatives, and colorants.

[0087] <Set>

[0088] This embodiment relates to a kit for manufacturing the aforementioned rust inhibitor composition (hereinafter also referred to as "the kit of this disclosure"). As an example of the kit of this disclosure, a kit (two-component rust inhibitor composition) can be provided, which contains two solutions in an immiscible state: one solution containing components A, B', and D (first solution), and the other solution containing components A, C', and D (second solution), which are mixed during use. After the first and second solutions are mixed, they can be diluted with water or an aqueous solution as needed. The first or second solution may contain all or part of the water used in the preparation of the rust inhibitor composition. The first and second solutions may each contain any of the aforementioned components as needed. According to the kit of this disclosure, a rust inhibitor composition with excellent storage stability can be prepared.

[0089] <Manufacturing methods and rust prevention methods for the items>

[0090] The method for manufacturing the article and the method for preventing rust on the metal article according to this embodiment include a rust prevention step of forming a rust-preventive film derived from the aforementioned rust inhibitor composition on the metal surface of the metal article. The aforementioned metal article is not particularly limited; examples include metal articles made of ferrous components such as steel and cast iron; metal articles made of non-ferrous metal components such as copper, zinc, aluminum, and alloys of these metals; and metal articles obtained by combining the aforementioned ferrous components with the aforementioned non-ferrous metal components.

[0091] [Rust prevention process]

[0092] In the above-mentioned rust prevention process, there is no particular limitation on the method of forming a rust-preventive film from the above-mentioned rust inhibitor composition on the metal surface of the metal article. For example, the above-mentioned rust prevention process may include a contact process in which the above-mentioned rust inhibitor composition comes into contact with the metal surface of the metal article, and a drying process in which the metal article having the above-mentioned rust inhibitor composition on its metal surface is dried.

[0093] [Contact Process]

[0094] In the above-described contact process, the method for contacting the rust inhibitor composition containing the above-described component A, component B', component C', and component D with the metal surface of the metal article is not particularly limited, and can be carried out by known methods. Examples of methods for contacting the rust inhibitor composition with the metal surface of the metal article include spraying, dripping, or coating the rust inhibitor composition onto the surface of the metal article, or immersing the metal article in the rust inhibitor composition.

[0095] [Drying process]

[0096] In the above-described drying process, there is no particular limitation on the method of drying the metal article having the above-described rust inhibitor composition on its surface, and the drying can be carried out by known methods.

[0097] Regarding the drying temperature in the above-mentioned drying process, from the viewpoint of reducing energy costs and environmental burden, it is preferably below 100°C, more preferably below 90°C, and even more preferably below 80°C. It should be noted that since the above-mentioned cleaning agent composition has excellent drying properties at room temperature, the above-mentioned drying temperature can be below 30°C. Furthermore, regarding the above-mentioned drying temperature, from the viewpoint of improving productivity, it is preferably above 10°C, more preferably above 20°C.

[0098] The aforementioned drying process can also be a process in which the remaining cleaning agent composition is removed from the metal article by means of air purging or the like, and then dried. In this case, regarding the temperature of the air being blown, from the viewpoint of improving productivity, it is preferably 20°C or higher, more preferably 30°C or higher, and even more preferably 40°C or higher. From the viewpoint of reducing energy costs and environmental burden, it is preferably 100°C or lower, more preferably 90°C or lower, and even more preferably 80°C or lower.

[0099] The above-described rust inhibitor composition can be used as a rust inhibitor. There are no particular limitations on the metal articles that can be treated with the above-described rust inhibitor composition for rust prevention; however, examples include metal articles and metal parts that are raw materials for transportation machinery such as automobiles, bicycles, railway vehicles, ships, and airplanes; household appliances such as televisions, air conditioners, and refrigerators; electronic equipment such as portable terminals and computers; tableware; and beverage cans.

[0100] Regarding the above-described embodiments, this specification further discloses the following compositions and manufacturing methods, etc.

[0101] <1>

[0102] A rust inhibitor composition comprising an amine (component A) with a molecular weight of 30 or more and 140 or less as shown in the following general formula (I), a dicarboxylic acid (component B) with 6 or more and 22 or less carbon atoms and a salt of the above component A (component B'), a monocarboxylic acid (component C) with 8 or more and 22 or less carbon atoms and a salt of the above component A (component C'), and water (component D).

[0103] [Chemistry 4]

[0104]

[0105] (In the above general formula (I), R) 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 (A hydrocarbon group having 1 or more but less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.)

[0106] <2>

[0107] According to the rust inhibitor composition described in <1>, the content of the above-mentioned component A is 0.1% by mass or more and 50% by mass or less, or 0.2% by mass or more and 30% by mass or less, or 0.3% by mass or more and 20% by mass or less.

[0108] <3>

[0109] According to the rust inhibitor composition described in <1> or <2>, the content of the above-mentioned component A is 0.1% by mass or more and 4% by mass or less, or 0.2% by mass or more and 3.5% by mass or less, or 0.3% by mass or more and 3% by mass or less.

[0110] <4>

[0111] According to any one of <1> to <3>, the content of the aforementioned component B' is 0.1% by mass or more and 20% by mass or less, or 0.3% by mass or more and 15% by mass or less, or 0.5% by mass or more and 10% by mass or less.

[0112] <5>

[0113] According to any one of <1> to <4>, the content of the aforementioned component B' is 0.1% by mass or more and 2% by mass or less, or 0.3% by mass or more and 1.8% by mass or less, or 0.5% by mass or more and 1.5% by mass or less.

[0114] <6>

[0115] According to any one of <1> to <5>, the content of the aforementioned component C' is 0.1% by mass or more and 50% by mass or less, or 0.6% by mass or more and 40% by mass or less, or 0.9% by mass or more and 30% by mass or less.

[0116] <7>

[0117] According to any one of <1> to <6>, the content of the aforementioned component C' is 0.1% by mass or more and 5% by mass or less, or 0.6% by mass or more and 4% by mass or less, or 0.9% by mass or more and 3% by mass or less.

[0118] <8>

[0119] According to any one of <1> to <7>, the content of the aforementioned component D is 10% or more by mass and 97% or less by mass, or 40% or more by mass and 96% or less by mass, or 50% or more by mass and 96% or less by mass, or 80% or more by mass and 96% or less by mass, or 90% or more by mass and 96% or less by mass.

[0120] <9>

[0121] According to any one of <1> to <8>, the mass ratio of the content of the above-mentioned component B' to the content of the above-mentioned component C' (content of component B' / content of component C') is 0.1 or more and 2 or less, or 0.2 or more and 1.4 or less, or 0.2 or more and 1.1 or less.

[0122] <10>

[0123] A rust inhibitor composition comprising an amine (component A) having a molecular weight of 30 or more and 140 or less, a dicarboxylic acid having 6 or more and 22 or less carbon atoms (component B), a monocarboxylic acid having a hydrocarbon group having 7 or more and 21 or less carbon atoms (component C), and water (component D).

[0124] [Chemistry 5]

[0125]

[0126] (In the above general formula (I), R) 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 (A hydrocarbon group having 1 or more but less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.)

[0127] <11>

[0128] According to the rust inhibitor composition described in <10>, the amount of component A is 0.5% by mass or more and 60% by mass or less, or 1% by mass or more and 30% by mass or less, or 1.5% by mass or more and 25% by mass or less.

[0129] <12>

[0130] According to the rust inhibitor composition described in <10> or <11>, the amount of the above-mentioned component A is 0.5% by mass or more and 5% by mass or less, or 1% by mass or more and 3.5% by mass or less, or 1.5% by mass or more and 3% by mass or less.

[0131] <13>

[0132] According to any one of <10> to <12>, the amount of component B is 0.1% by mass or more and 10% by mass or less, or 0.2% by mass or more and 7% by mass or more and 0.3% by mass or less and 5% by mass or less.

[0133] <14>

[0134] According to any one of <10> to <13>, the amount of component B is 0.1% by mass or more and 1% by mass or less, or 0.2% by mass or more and 0.9% by mass or 0.3% by mass or more and 0.8% by mass or less.

[0135] <15>

[0136] According to any one of <10> to <14>, the amount of the above-mentioned component C is 0.3% by mass or more and 40% by mass or less, or 0.5% by mass or more and 30% by mass or less, or 1% by mass or more and 20% by mass or less.

[0137] <16>

[0138] According to any one of <10> to <15>, the amount of the above-mentioned component C is 0.3% by mass or more and 4% by mass or less, or 0.5% by mass or more and 3% by mass or less, or 1% by mass or more and 2.5% by mass or less.

[0139] <17>

[0140] According to any one of <10> to <16>, the mass ratio of the amount of component C to the amount of component B (amount of component B / amount of component C) is 0.1 or more and 1.5 or less, or 0.15 or more and 1 or less, or 0.2 or more and 0.5 or less.

[0141] <18>

[0142] The rust inhibitor composition according to any one of <1> to <17>, wherein the above-mentioned component A is at least one alkanolamine selected from monoethanolamine, monoisopropanolamine, diethanolamine, and diisopropanolamine.

[0143] <19>

[0144] The rust inhibitor composition according to any one of <1> to <18>, wherein the above-mentioned component B comprises at least one of 1,8-octanoic acid, 1,10-sebacic acid, 1,11-undecanoic acid, and 1,12-dodecanoic acid.

[0145] <20>

[0146] According to any one of <1> to <19>, the rust inhibitor composition comprises at least one of the following: saturated fatty acids selected from lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, eicosanoic acid, behenic acid, etc.; and unsaturated fatty acids selected from palmitic acid, oleic acid, transoleic acid, icosenoic acid, sinapic acid, brassinolic acid, linoleic acid, linolenic acid, arachidonic acid, stearylene acid, etc.

[0147] <21>

[0148] A rust inhibitor composition comprising an amine (component A) with a molecular weight of 30 or more and 140 or less as shown in the following general formula (I), a dicarboxylic acid (component B) with 6 or more and 22 or less carbon atoms and a salt of the above component A (component B'), a monocarboxylic acid (component C) with 8 or more and 22 or less carbon atoms and a salt of the above component A (component C'), and water (component D).

[0149] Component A is at least one alkanolamine selected from monoethanolamine, monoisopropanolamine, diethanolamine, and diisopropanolamine.

[0150] The mass ratio of the content of component B' to the content of component C' (content of component B' / content of component C') is 0.1 or more and 2 or less.

[0151] The content of the above-mentioned component C' is more than 0.1% by mass and less than 50% by mass.

[0152] [Chemistry 6]

[0153]

[0154] (In the above general formula (I), R) 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 (A hydrocarbon group having 1 or more but less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.)

[0155] <22>

[0156] A rust inhibitor composition comprising an amine (component A) having a molecular weight of 30 or more and 140 or less, as shown in general formula (I), a dicarboxylic acid having 6 or more and 22 or less carbon atoms (component B), a monocarboxylic acid having a hydrocarbon group having 7 or more and 21 or less carbon atoms (component C), and water (component D).

[0157] Component A is at least one alkanolamine selected from monoethanolamine, monoisopropanolamine, diethanolamine, and diisopropanolamine.

[0158] The mass ratio of the amount of component C to the amount of component B (amount of component B / amount of component C) is 0.1 or more and 1.5 or less.

[0159] The amount of component C is 0.3% by mass or more and 40% by mass or less.

[0160] [Chemistry 7]

[0161]

[0162] (In the above general formula (I), R) 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 (A hydrocarbon group having 1 or more but less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.)

[0163] <23>

[0164] A method for manufacturing an article, comprising a rust-preventing step, wherein a rust-preventing film is formed on the metal surface of an article having a metal part, the rust-preventing agent composition described in any one of <1> to <22>.

[0165] <24>

[0166] A method for preventing rust on an article, comprising a rust prevention step of forming a rust-preventive film on the metal surface of an article having a metal part, the rust-preventive agent composition described in any one of <1> to <22>.

[0167] Example

[0168] The present invention will be further described in detail below by way of embodiments; however, the present invention is not limited by these embodiments.

[0169] <Examples 1-1 to 1-2 and Comparative Example 1-1>

[0170] [Preparation of Rust Inhibitor Composition]

[0171] Rust inhibitor compositions of Examples 1-1 to 1-2 and Comparative Example 1-1, containing the amounts of each component listed in Table 1, were prepared by mixing and stirring the components as specified in Table 1. The values ​​in Table 1 represent the amount of the active ingredient, expressed as a percentage by mass.

[0172] The components listed in Table 1 use the substances described below.

[0173] (amine)

[0174] • Diethanolamine: Manufactured by Fujifilm and Kazuko Pure Chemical Industries, Ltd., diethanolamine (molecular weight: 105.1)

[0175] • Monoethanolamine: Manufactured by Fujifilm and Kazuko Pure Chemical Industries, 2-aminoethanol (molecular weight: 61.08)

[0176] • Triethanolamine: 2,2',2”-nitrotriethanol (molecular weight: 149.19), manufactured by KISHIDA Chemicals.

[0177] (Dicarboxylic acid)

[0178] • 1,10-Sebacic acid: manufactured by Tokyo Chemical Industry Co., Ltd. (carbon number: 12)

[0179] (Monocarboxylic acid)

[0180] Oleic acid: Produced by Nacalai Tesque, oleic acid (carbon number: 18)

[0181] • Myristic acid: Manufactured by Kao Corporation, LUNAC MY-98 (carbon number: 14)

[0182] Lauric acid: Manufactured by Kao Corporation, LUNAC L-98 (carbon number: 12)

[0183] (water)

[0184] • Deionized water (manufactured by YAMATO Scientific Corporation, purified using WGH200)

[0185] [Evaluation Method]

[0186] [pH measurement]

[0187] The pH of the rust inhibitor composition at a liquid temperature of 25°C was determined using a pH electrode (DKK Corporation, HM-30G).

[0188] [Rust Acceleration Test]

[0189] 100g of rust inhibitor composition was added to a 100mL glass beaker. A steel plate (SPCC, 50mm × 50mm × 0.8mm) that had been degreased and cleaned with acetone was immersed in the rust inhibitor composition for 30 seconds. The steel plate was then removed and dried by blowing air. A substrate was erected in a 30L polypropylene box-type container simulating a turnover box used for transporting metal goods. The container was placed in a high-temperature, high-humidity bath set at 60°C and 95% RH. During evaluation, the surface of the steel plate was visually observed every 12 hours, and the time required until the steel plate rusted was measured.

[0190] [Friction Coefficient Measurement Test]

[0191] A given rust inhibitor (aqueous solution or ethanol-water solution if insoluble in water) is applied to either a hexane-degreased steel ball (SAE-AMS6440 steel, PCS Instruments) or a steel disc (ISO 3290 standard grade 28, SAE-AMS6440 steel, PCS Instruments) and dried. The disc is then placed in a light oil lubrication friction test apparatus (HFRR, PCS). The test is conducted at a temperature of 27°C, a frequency of 10 Hz, a load of 10 g, a travel distance of 2000 μm, a measurement interval of 1 second, and a measurement time of 1800 seconds. The average value of the measured values ​​is taken as the coefficient of friction.

[0192] The evaluation results are shown in Table 1.

[0193] [Table 1]

[0194]

[0195] <Examples 2-1 to 2-2 and Comparative Example 2-1>

[0196] [Preparation of rust inhibitor compositions and evaluation of their stability]

[0197] Add water, amine, dicarboxylic acid, and monocarboxylic acid sequentially to a 100mL glass vial according to the proportions in Table 2. Stir at room temperature for 6 hours, then let stand at room temperature for 24 hours. Observe the appearance of the liquid and visually confirm the presence or absence of component separation.

[0198] The evaluation results are shown in Table 2.

[0199] [Table 2]

[0200]

Claims

1. A rust inhibitor composition comprising component A, component B', component C', and component D, Component A is an amine with a molecular weight of 30 or more and 140 or less, as shown in the following general formula (I). Component B' is a salt of component B and component A, wherein component B is a dicarboxylic acid with 6 or more carbon atoms and 22 or fewer carbon atoms. Component C' is a salt of component C and component A, wherein component C is a monocarboxylic acid with 8 or more carbon atoms and 22 or fewer carbon atoms. Component D is water. In the general formula (I), R 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 It is a hydrocarbon group with 1 or more carbon atoms and less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.

2. The rust inhibitor composition according to claim 1, wherein, The content of component A is 0.1% by mass or more and 50% by mass or less.

3. The rust inhibitor composition according to claim 1 or 2, wherein, The content of component B' is 0.1% by mass or more and 20% by mass or less.

4. The rust inhibitor composition according to any one of claims 1 to 3, wherein, The content of component C' is 0.1% by mass or more and 50% by mass or less.

5. The rust inhibitor composition according to any one of claims 1 to 4, wherein, The content of component D is 10% by mass or more and 97% by mass or less.

6. The rust inhibitor composition according to any one of claims 1 to 5, wherein, The mass ratio of the content of component B' to the content of component C', i.e., the content of component B' / content of component C', is 0.1 or more and 2 or less.

7. A rust inhibitor composition comprising components A, B, C, and D. Component A is an amine with a molecular weight of 30 or more and 140 or less, as shown in the following general formula (I). Component B is a dicarboxylic acid with 6 or more carbon atoms and 22 or fewer carbon atoms. Component C is a monocarboxylic acid with a hydrocarbon group having 7 or more carbon atoms and 21 or fewer carbon atoms. Component D is water. In the general formula (I), R 1 R is a hydrocarbon group having 1 or more carbon atoms and less than 20 carbon atoms, having a hydroxyl or ether group. 2 It is a hydrocarbon group with 1 or more carbon atoms and less than 20 carbon atoms, or hydrogen, having a hydroxyl or ether group.

8. The rust inhibitor composition according to claim 7, wherein, The amount of component A is 0.5% by mass or more and 60% by mass or less.

9. The rust inhibitor composition according to claim 7 or 8, wherein, The mass ratio of the amount of component C to the amount of component B, i.e., the amount of component B / the amount of component C, is 0.1 or more and 1.5 or less.

10. A method for manufacturing an article, comprising: a rust prevention step of forming a rust-preventive film derived from any one of the rust-preventive compositions according to claims 1 to 9 on the metal surface of an article having a metal portion.

11. A method for preventing rust on an article, comprising: a rust prevention step of forming a rust-preventive film derived from any one of the rust-preventive agent compositions according to claims 1 to 9 on the metal surface of an article having a metal portion.

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