Antirust composition

Abstract

The present invention is an antirust composition containing: an amine (component A) represented by general formula (I) and having a molecular weight of 30-140; a salt (component B') of the component A and a C6-C22 dicarboxylic acid (component B); a salt (component C') of the component A and a C8-C22 monocarboxylic acid (component C); and water (component D). The present invention can provide the antirust composition with which it is possible to suppress a decrease in the friction factor of a metal surface due to an antirust coating. (In general formula (I), R1 is a C1-C20 hydrocarbon group having a hydroxy group or an ether group, and R2 is hydrogen or a C1-C20 hydrocarbon group having a hydroxy group or an ether group.)

Description

Rust inhibitor composition

[0001] The present invention relates to a rust inhibitor composition.

[0002] Metals such as iron, copper, and aluminum are processed and used in industrial products in a variety of fields. Because metals are easily oxidized by oxygen in the air and rust easily, rust prevention treatments are generally applied to the metal surfaces of articles having metal parts (hereinafter also referred to as "metal articles"), such as by applying an oil-based rust inhibitor such as rust-preventive oil (for example, JP 2020-164987 A).

[0003] The present invention provides a rust inhibitor composition containing an amine (component A) having a molecular weight of 30 to 140 and represented by the following general formula (I), a salt (component B') of component A with a dicarboxylic acid (component B) having 6 to 22 carbon atoms, a salt (component C') of component A with a monocarboxylic acid (component C) having 8 to 22 carbon atoms, and water (component D). (In the general formula (I), R １ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, and R ２ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, or hydrogen.

[0004] The present invention also provides a rust inhibitor composition comprising an amine (component A) having a molecular weight of 30 to 140 and represented by the general formula (I), a dicarboxylic acid (component B) having 6 to 22 carbon atoms, a monocarboxylic acid having a hydrocarbon group having 7 to 21 carbon atoms (component C), and water (component D).

[0005] The present invention also provides a method for producing an article, comprising a rust prevention step of forming an anti-rust coating derived from the rust inhibitor composition on the metal surface of the metal article.

[0006] The present invention also provides a method for preventing rust on an article, comprising a rust prevention step of forming a rust-preventive coating derived from the rust inhibitor composition on the metal surface of the metal article. Detailed Description of the Invention

[0007] Generally, oil-based rust inhibitors have high rust-preventing properties, but when a metal article is treated with an oil-based rust inhibitor for rust prevention, it is necessary to remove any unnecessary oil-based rust inhibitor from the metal surface of the metal article immediately before work in a process subsequent to the process in which the rust prevention treatment was performed (for example, an assembly process in which the metal article is used as a part of a component, hereinafter also referred to simply as a subsequent process), which increases the number of work steps.

[0008] To address this issue, one possible solution is the use of an aqueous rust inhibitor that can form a rust-preventive coating that does not need to be removed before subsequent work.When a metal article has been rust-prevented with an aqueous rust inhibitor composition, the metal article may be used before a subsequent process, such as an assembly process, without removing the rust-preventive coating derived from the aqueous rust inhibitor composition from the surface of the metal article.In such cases, the coefficient of friction on the surface of the metal article is reduced by the rust-preventive coating derived from the aqueous rust inhibitor composition, and fasteners such as bolts and nuts that secure the metal article or are secured to the metal article may become more likely to come off or may suffer from tightening problems.

[0009] Furthermore, it is important that the rust inhibitor composition for forming the rust-preventive coating has stability as a composition, taking into consideration the ease of transportation, storage period, and use.

[0010] An object of the present invention is to provide a rust inhibitor composition that can suppress a decrease in the coefficient of friction of a metal surface caused by a rust-preventive coating, as well as a method for producing an article and a method for rust prevention of an article.

[0011] The present invention provides a rust inhibitor composition containing an amine (component A) having a molecular weight of 30 to 140 and represented by the following general formula (I), a salt (component B') of component A with a dicarboxylic acid (component B) having 6 to 22 carbon atoms, a salt (component C') of component A with a monocarboxylic acid (component C) having 8 to 22 carbon atoms, and water (component D). (In the general formula (I), R １ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, and R ２ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, or hydrogen.

[0012] The present invention also provides a rust inhibitor composition comprising an amine (component A) having a molecular weight of 30 to 140 and represented by the general formula (I), a dicarboxylic acid (component B) having 6 to 22 carbon atoms, a monocarboxylic acid having a hydrocarbon group having 7 to 21 carbon atoms (component C), and water (component D).

[0013] The present invention also provides a method for producing an article, comprising a rust prevention step of forming an anti-rust coating derived from the rust inhibitor composition on the metal surface of the metal article.

[0014] The present invention also provides a method for preventing rust on an article, comprising a rust prevention step of forming a rust-preventive coating derived from the rust inhibitor composition on the metal surface of the metal article.

[0015] According to the present invention, it is possible to provide a rust inhibitor composition that can suppress a decrease in the coefficient of friction of a metal surface caused by a rust-preventive coating, as well as a method for producing an article and a method for rust prevention of an article.

[0016] An embodiment of the present invention will be described below.

[0017] <Rust Preventive Composition> The rust preventive composition of the present embodiment contains an amine (component A) having a molecular weight of 30 to 140 and represented by the following general formula (I), a salt (component B') of component A with a dicarboxylic acid (component B) having 6 to 22 carbon atoms, a salt (component C') of component A with a monocarboxylic acid (component C) having 8 to 22 carbon atoms, and water (component D). (In the general formula (I), R １ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, and R ２ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, or hydrogen.

[0018] The rust inhibitor composition of this embodiment can suppress a decrease in the coefficient of friction of a metal surface due to a rust-preventive coating. Although the reason why the rust inhibitor composition exhibits such an effect is not clear, it is presumed that the salt (component B') of the dicarboxylic acid (component B) and the amine (component A) and the salt (component C') of the monocarboxylic acid (component C) and the amine (component A) act on iron, and the salt (component C') of the monocarboxylic acid (component C) and the amine (component A) act on non-ferrous metals such as aluminum and copper, thereby suppressing a decrease in the coefficient of friction of a metal surface due to a rust-preventive coating.

[0019] [Amine (Component A)] The rust inhibitor composition contains an amine (Component A) represented by the general formula (I) and having a molecular weight of 30 or more and 140 or less.

[0020] The molecular weight of the amine (component A) is 140 or less, preferably 100 or less, from the viewpoint of suppressing a decrease in the coefficient of friction of the metal surface due to the rust-preventive coating derived from the rust inhibitor composition. The molecular weight of the amine (component A) is 30 or more, preferably 50 or more, from the viewpoint of suppressing the odor of the amine.

[0021] In the general formula (I), R １ is a hydrocarbon group having 1 to 20 carbon atoms, and the hydrocarbon group has a hydroxy group or an ether group. １ is preferably a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group.

[0022] In the general formula (I), 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.

[0023] In the general formula (I), R ２ is a hydrocarbon group having 1 to 20 carbon atoms, or hydrogen, and the hydrocarbon group has a hydroxy group or an ether group. ２ is preferably a hydrocarbon group having 1 to 20 carbon atoms and a hydroxy group, or hydrogen.

[0024] In the general formula (I), R ２From 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.

[0025] From the viewpoint of improving rust-preventive performance on metals, the amine (component A) preferably comprises at least one alkanolamine selected from monoethanolamine, monoisopropanolamine, diethanolamine, and 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-decyloxyethylamine, 2-dodecyloxyethylamine, 2-tetradecyloxyethylamine, 2-stearyloxyethylamine, 2-oleyloxyethylamine, 3-methoxypropylamine, 3-ethoxypropylamine, 3-isopropoxypropylamine, 3-isobutoxypropylamine, and 3-tert-butoxypropylamine, more preferably monoethanolamine and at least one selected from diethanolamine.

[0026] From the viewpoint of improving rust-preventing performance on metals, the total content of alkanolamines and alkoxyalkylamines in the amine (component A) 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. In this specification, "substantially 100% by mass" means that the content includes the case where a trace amount of impurities is inevitably mixed in.

[0027] From the viewpoint of improving the rust-preventing performance on metals, the total content of monoethanolamine and diethanolamine in the amine (component A) 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.

[0028] From the viewpoint of improving storage stability, the content of the amine (component A) in the rust inhibitor composition 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.

[0029] The content of the amine (component A) in the rust inhibitor composition is preferably 50% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less from the viewpoint of improving storage stability. The content of the amine (component A) in the rust inhibitor composition is preferably 4% by mass or less, more preferably 3.5% by mass or less, and even more preferably 3% by mass or less from the viewpoint of suppressing surface deterioration of metal articles.

[0030] [Salt (Component B') of Component A with Dicarboxylic Acid (Component B) Having 6 to 22 Carbon Atoms] From the viewpoint of improving rust-preventive performance against metals, the number of carbon atoms in the dicarboxylic acid (Component B) is 6 or more, preferably 8 or more, preferably 9 or more, and more preferably 10 or more. From the viewpoint of improving rust-preventive performance against metals, the number of carbon atoms in the dicarboxylic acid (Component B) is 22 or less, preferably 18 or less, and more preferably 14 or less.

[0031] The dicarboxylic acid (component B) is represented, for example, by the following general formula (II): The dicarboxylic acid (component B) may be used alone or in combination of two or more kinds. General formula (II): HOOC-R ３ -COOH (in general formula (II), R ３ is an alkylene group having 4 to 20 carbon atoms.

[0032] From the viewpoint of improving the rust-preventing performance against iron, the dicarboxylic acid (component B) preferably includes at least one selected from hexanedioic acid, 1,8-octanedicarboxylic acid, 1,10-decanedicarboxylic acid, 1,11-undecanedicarboxylic acid, and 1,12-dodecanedicarboxylic acid, and more preferably includes 1,10-decanedicarboxylic acid.

[0033] From the viewpoint of improving the rust-preventing performance against iron, the total content of hexanedioic acid, 1,8-octanedicarboxylic acid, 1,10-decanedicarboxylic acid, 1,11-undecanedicarboxylic acid, and 1,12-dodecanedicarboxylic acid in the dicarboxylic acid (component B) 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.

[0034] From the viewpoint of improving the rust-preventing performance against iron, the content of 1,10-decanedicarboxylic acid in the dicarboxylic acid (component B) 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.

[0035] Since the dicarboxylic acid (component B) and the amine (component A) form a salt in water, the rust inhibitor composition essentially contains a salt (component B') of the dicarboxylic acid (component B) and the amine (component A). The salt (component B') of the dicarboxylic acid (component B) and the amine (component A) may be used alone or in combination of two or more. The salt (component B') of the dicarboxylic acid (component B) and the amine (component A) may be prepared from a raw material that has already formed a salt.

[0036] The content of Component B' in the rust inhibitor composition 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, from the viewpoint of improving rust prevention performance against metals.

[0037] The content of Component B' in the rust inhibitor composition is preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less from the viewpoint of improving storage stability. The content of Component B' in the rust inhibitor composition 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 from the viewpoint of suppressing a decrease in the coefficient of friction of a metal surface due to a rust-preventive coating derived from the rust inhibitor composition.

[0038] From the viewpoint of improving storage stability, the mass ratio of the amount of Component A to the amount of Component B in the rust inhibitor composition (amount of Component B' / amount of Component A) is preferably 0.01 or more, more preferably 0.05 or more, even more preferably 0.1 or more, and still more preferably 0.15 or more. From the viewpoint of improving rust prevention performance on metals, the mass ratio of the amount of Component A to the amount of Component B in the rust inhibitor composition (amount of Component B / amount of Component A) is preferably 2 or less, more preferably 1.5 or less, even more preferably 1 or less, and still more preferably 0.5 or less.

[0039] From the viewpoint of improving storage stability, the mass ratio of the content of Component A to the content of Component B' in the rust inhibitor composition (content of Component B' / content of Component A) is preferably 0.01 or more, more preferably 0.1 or more, even more preferably 0.15 or more, and still more preferably 0.2 or more. From the viewpoint of improving rust prevention performance on metals, the mass ratio of the content of Component A to the content of Component B' in the rust inhibitor composition (content of Component B' / content of Component A) is preferably 2 or less, more preferably 1.5 or less, even more preferably 1 or less, and still more preferably 0.8 or less.

[0040] [Salt (Component C') of Component A with Monocarboxylic Acid (Component C) Having from 8 to 22 Carbon Atoms] From the viewpoint of improving rust-preventive performance against metals, the number of carbon atoms in the monocarboxylic acid (Component C) is 8 or more, preferably 12 or more, more preferably 16 or more, and even more preferably 17 or more. From the viewpoint of improving rust-preventive performance against metals, the number of carbon atoms in the monocarboxylic acid (Component C) is 22 or less, preferably 20 or less, and more preferably 19 or less.

[0041] The monocarboxylic acid (component C) is represented, for example, by the following general formula (III): The monocarboxylic acid (component C) may be used alone or in combination of two or more kinds. General formula (III): R ４ -COOH (in general formula (III), R ４ is a linear or branched alkyl or alkenyl group having 7 to 21 carbon atoms, and is preferably linear from the viewpoint of improving rust prevention performance on metals.

[0042] From the viewpoint of improving rust-preventive performance on metals, the monocarboxylic acid (component C) preferably contains at least one selected from saturated fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, arachidic acid, and behenic acid; 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, more preferably contains at least one selected from palmitic acid, stearic acid, isostearic acid, oleic acid, and linoleic acid, and even more preferably contains at least one selected from isostearic acid and oleic acid.

[0043] From the viewpoint of improving rust-preventive performance against metals, the total content of saturated fatty acids and unsaturated fatty acids in the monocarboxylic acid (component C) 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.

[0044] From the viewpoint of improving the rust-preventing performance on metals, the total content of palmitic acid, stearic acid, isostearic acid, oleic acid, and linoleic acid in the monocarboxylic acid (component C) 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.

[0045] From the viewpoint of improving rust-preventing performance on metals, the total content of isostearic acid and oleic acid in the monocarboxylic acid (component C) 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.

[0046] Since the monocarboxylic acid (component C) and the amine (component A) form a salt in water, the rust inhibitor composition essentially contains a salt (component C') of the monocarboxylic acid (component C) and the amine (component A). The salt (component C') of the monocarboxylic acid (component C) and the amine (component A) may be used alone or in combination of two or more. The salt (component C') of the monocarboxylic acid (component C) and the amine (component A) may be prepared from a raw material that has already formed a salt.

[0047] The content of Component C' in the rust inhibitor composition 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, from the viewpoint of improving rust prevention performance against metals.

[0048] The content of Component C' in the rust inhibitor composition is preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less from the viewpoint of improving storage stability. The content of Component C' in the rust inhibitor composition is preferably 5% by mass or less, more preferably 4% by mass or less, and even more preferably 3% by mass or less from the viewpoint of suppressing a decrease in the coefficient of friction of a metal surface due to a rust-preventive coating derived from the rust inhibitor composition.

[0049] From the viewpoint of improving storage stability, the mass ratio of the amount of component A to the amount of component C in the rust inhibitor composition (amount of component A / amount of component C) is preferably 0.01 or more, more preferably 0.1 or more, even more preferably 0.5 or more, still more preferably 1 or more, and still more preferably 2 or more. From the viewpoint of improving rust prevention performance on metals, the mass ratio of the amount of component A to the amount of component C in the rust inhibitor composition (amount of component A / amount of component C) is preferably 10 or less, more preferably 8 or less, and still more preferably 7 or less.

[0050] From the viewpoint of improving storage stability, the mass ratio of the content of Component A to the content of Component C' in the rust inhibitor composition (content of Component A / content of Component C') is preferably 0.01 or more, more preferably 0.05 or more, even more preferably 0.1 or more, and still more preferably 0.15 or more. From the viewpoint of improving rust prevention performance on metals, the mass ratio of the content of Component A' to the content of Component C' in the rust inhibitor composition (content of Component A / content of Component C') 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 still more preferably 1 or less.

[0051] The mass ratio of the amount of component B to the amount of component C in the rust inhibitor composition (amount of component B / amount of component C) is preferably 0.01 or more, more preferably 0.1 or more, and even more preferably 0.2 or more, from the viewpoint of improving storage stability. The mass ratio of the amount of component B to the amount of component C in the rust inhibitor composition (amount of component B / amount of component C) 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, from the viewpoint of improving rust prevention performance on metals.

[0052] The mass ratio of the content of Component B' to the content of Component C' in the rust inhibitor composition (content of Component B' / content of Component C') is preferably 0.1 or more, and more preferably 0.2 or more, from the viewpoint of improving storage stability. The mass ratio of the content of Component B' to the content of Component C' in the rust inhibitor composition (content of Component B' / content of Component C') 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, from the viewpoint of improving rust prevention performance on metals.

[0053] [Water (Component D)] As the water (component D), industrial water, tap water, pure water, deionized water, distilled water, etc. can be used. From the viewpoint of improving the rust-preventing performance on metals, at least one selected from pure water, deionized water, and distilled water is preferred, and pure water is more preferred.

[0054] The content of Component D in the rust inhibitor composition is preferably 10% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more from the viewpoint of improving storage stability. The content of Component D in the rust inhibitor composition is preferably 80% by mass or more, more preferably 85% by mass or more, and even more preferably 90% by mass or more from the viewpoint of suppressing a decrease in the coefficient of friction of a metal surface due to a rust-preventive coating derived from the rust inhibitor composition.

[0055] The content of Component D in the rust inhibitor composition is preferably 97% by mass or less, and more preferably 96% by mass or less, from the viewpoint of improving rust prevention performance against metals.

[0056] [Other Components] The rust inhibitor composition may contain other components, other than the components A to D, which are generally used as rust inhibitors, to the extent that the components do not affect the performance. Examples of such other components include solubilizers, dispersants, thickeners such as thickeners, antifoaming agents, preservatives, and colorants.

[0057] The rust inhibitor composition can be produced by blending the above-mentioned components by a known method. That is, the rust inhibitor composition may be a rust inhibitor composition obtained by blending the components A, B, C, and D. The term "blending" as used herein includes mixing the above-mentioned components simultaneously or in any order.

[0058] The amount of Component A blended 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, from the viewpoint of improving storage stability.

[0059] From the viewpoint of improving storage stability, the blending amount of Component A is preferably 60% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less. From the viewpoint of suppressing a decrease in the coefficient of friction of the metal surface due to the rust preventive coating derived from the rust inhibitor composition, the blending amount of Component A is preferably 5% by mass or less, more preferably 3.5% by mass or less, and even more preferably 3% by mass or less.

[0060] The amount of Component B 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, from the viewpoint of improving the rust prevention performance for metals.

[0061] From the viewpoint of improving storage stability, the blending amount of Component B is preferably 10% by mass or less, more preferably 7% by mass or less, and even more preferably 5% by mass or less. From the viewpoint of suppressing a decrease in the coefficient of friction of the metal surface due to the rust preventive coating derived from the rust inhibitor composition, the blending amount of Component B 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.

[0062] From the viewpoint of improving the rust prevention performance for metals, the blending amount of the component C 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.

[0063] From the viewpoint of improving storage stability, the blending amount of Component C is preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less. From the viewpoint of suppressing a decrease in the coefficient of friction of the metal surface due to the rust preventive coating derived from the rust inhibitor composition, the blending amount of Component C is preferably 4% by mass or less, more preferably 3% by mass or less, and even more preferably 2.5% by mass or less.

[0064] From the viewpoint of improving storage stability, the mass ratio of the amount of component C to the amount of component B (amount of component B / amount of component C) is preferably 0.1 or more, more preferably 0.15 or more, and even more preferably 0.2 or more. From the viewpoint of improving rust prevention performance on metals, the mass ratio of the amount of component C to the amount of component B (amount of component B / amount of component C) 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.

[0065] From the viewpoint of improving storage stability, the blending amount of the component D is preferably 10% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more. From the viewpoint of suppressing a decrease in the coefficient of friction of the metal surface due to the rust preventive coating derived from the rust inhibitor composition, the blending amount of the component D is preferably 80% by mass or more, more preferably 85% by mass or more, and even more preferably 90% by mass or more.

[0066] The amount of component D is preferably 97% by mass or less, and more preferably 96% by mass or less, from the viewpoint of suppressing a decrease in the coefficient of friction of the metal surface due to the rust preventive coating derived from the rust preventive composition.

[0067] The rust inhibitor composition may contain other components besides the components A to D generally used as rust inhibitors, provided that the components do not affect the performance of the composition. Examples of such other components include solubilizers, dispersants, thickeners such as thickeners, antifoaming agents, preservatives, and colorants.

[0068] <Kit> The kit of this embodiment relates to a kit for producing the rust inhibitor composition (hereinafter also referred to as the "kit of the present disclosure"). Examples of the kit of the present disclosure include a kit (two-component rust inhibitor composition) that contains a solution (first component) containing Component A, Component B', and Component D and a solution (second component) containing Component A, Component C', and Component D in a mutually unmixed state, and that is mixed at the time of use. After the first component and the second component are mixed, they may be diluted with water or an aqueous solution as needed. The first component or the second component may contain all or a portion of the water used to prepare the rust inhibitor composition. The first component and the second component may each contain the optional components described above as needed. The kit of the present disclosure allows the preparation of a rust inhibitor composition with excellent storage stability.

[0069] The method for manufacturing an article and the method for rust-preventing a metal article according to the present embodiment include a rust-preventing step of forming a rust-preventive coating derived from the rust inhibitor composition on the metal surface of the metal article. The metal article is not particularly limited, and examples thereof include metal articles made of iron members such as steel and cast iron; metal articles made of non-ferrous metal members such as copper, zinc, aluminum, and alloys of these metals; and metal articles that are composites of the iron members and the non-ferrous metal members.

[0070] [Rust Prevention Step] In the rust prevention step, the method for forming a rust prevention coating derived from the rust inhibitor composition on the metal surface of a metal article is not particularly limited. For example, the rust prevention step may include a contacting step of bringing the rust inhibitor composition into contact with the metal surface of the metal article, and a drying step of drying the metal article having the rust inhibitor composition on its metal surface.

[0071] [Contacting Step] In the contacting step, a method for contacting the metal surface of the metal article with the rust inhibitor composition containing Component A, Component B', Component C', and Component D can be used without any particular limitation, and the contacting method can be performed by a known method. Examples of the method for contacting the metal surface of the metal article with the rust inhibitor composition include spraying, dropping, or applying the rust inhibitor composition onto the surface of the metal article, or immersing the metal article in the rust inhibitor composition.

[0072] [Drying Step] In the drying step, the method for drying the metal article having the rust inhibitor composition on the surface thereof is not particularly limited, and the metal article can be dried by a known method.

[0073] The drying temperature in the drying step is preferably 100° C. or lower, more preferably 90° C. or lower, and even more preferably 80° C. or lower, from the viewpoint of reducing energy costs and environmental impact. Since the cleaning composition has excellent drying properties at room temperature, the drying temperature may be 30° C. or lower. Furthermore, from the viewpoint of improving productivity, the drying temperature is preferably 10° C. or higher, and more preferably 20° C. or higher.

[0074] The drying step may be a step of removing excess cleaning composition from the metal article by air purging or the like, followed by drying. In this case, the temperature of the air blow is preferably 20° C. or higher, more preferably 30° C. or higher, and even more preferably 40° C. or higher, from the viewpoint of improving productivity, and is preferably 100° C. or lower, more preferably 90° C. or lower, and even more preferably 80° C. or lower, from the viewpoint of reducing energy costs and environmental load.

[0075] The rust inhibitor composition can be used as a rust inhibitor. The metal articles that can be treated for rust prevention with the rust inhibitor composition are not particularly limited, and examples thereof include transportation machinery such as automobiles, bicycles, trains, ships, and airplanes, home appliances such as televisions, air conditioners, and refrigerators, electronic devices such as mobile terminals and computers, and metal products and metal parts that are used as raw materials for tableware and beverage cans.

[0076] In relation to the above-described embodiment, the present specification further discloses the following compositions, production methods, etc.

[0077] <1> A rust inhibitor composition comprising an amine (component A) having a molecular weight of 30 to 140 and represented by the following general formula (I): a salt (component B') of a dicarboxylic acid (component B) having 6 to 22 carbon atoms with the component A; a salt (component C') of a monocarboxylic acid (component C) having 8 to 22 carbon atoms with the component A; and water (component D). (In the general formula (I), R １ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, and R ２is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, or hydrogen.) <2> The rust inhibitor composition according to <1>, wherein the content of component A is 0.1 to 50 mass% or 0.2 to 30 mass% or 0.3 to 20 mass%. <3> The rust inhibitor composition according to <1> or <2>, wherein the content of component A is 0.1 to 4 mass% or 0.2 to 3.5 mass% or 0.3 to 3 mass%. <4> The rust inhibitor composition according to any of <1> to <3>, wherein the content of component B' is 0.1 to 20 mass% or 0.3 to 15 mass% or 0.5 to 10 mass%. <5> The rust inhibitor composition according to any one of <1> to <4>, wherein the content of 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. <6> The rust inhibitor composition according to any one of <1> to <5>, wherein the content of 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. <7> The rust inhibitor composition according to any one of <1> to <6>, wherein the content of 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. <8> The rust inhibitor composition according to any one of <1> to <7>, wherein the content of Component D is 10% by mass or more and 97% by mass or less, or 40% by mass or more and 96% by mass or less, or 50% by mass or more and 96% by mass or less, or 80% by mass or more and 96% by mass or less, or 90% by mass or more and 96% by mass or less. <9> The rust inhibitor composition according to any one of <1> to <8>, wherein 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, or 0.2 or more and 1.4 or less, or 0.2 or more and 1.1 or less. <10> A rust inhibitor composition comprising an amine (component A) represented by the following general formula (I) and having a molecular weight of 30 to 140, a dicarboxylic acid (component B) having 6 to 22 carbon atoms, a monocarboxylic acid (component C) having a hydrocarbon group with 7 to 21 carbon atoms, and water (component D): (In the general formula (I), R１ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, and R ２is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, or hydrogen.) <11> The rust inhibitor composition according to <10>, wherein the blending amount of the component A is 0.5 to 60 mass% or 1 to 30 mass% or 1.5 to 25 mass%. <12> The rust inhibitor composition according to <10> or <11>, wherein the blending amount of the component A is 0.5 to 5 mass% or 1 to 3.5 mass% or 1.5 to 3 mass%. <13> The rust inhibitor composition according to any one of <10> to <12>, wherein the blending amount of the component B is 0.1 to 10 mass% or 0.2 to 7 mass% or 0.3 to 5 mass%. <14> The rust inhibitor composition according to any one of <10> to <13>, wherein the blending amount of the 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 less, or 0.3% by mass or more and 0.8% by mass or less. <15> The rust inhibitor composition according to any one of <10> to <14>, wherein the blending amount of the 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. <16> The rust inhibitor composition according to any one of <10> to <15>, wherein the blending amount of the 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. <17> The rust inhibitor composition according to any one of <10> to <16>, wherein 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. <18> The rust inhibitor composition according to any one of <1> to <17>, wherein component A is at least one alkanolamine selected from monoethanolamine, monoisopropanolamine, diethanolamine, and diisopropanolamine. <19> The rust inhibitor composition according to any one of <1> to <18>, wherein component B includes at least one selected from hexanedioic acid, 1,8-octanedicarboxylic acid, 1,10-decanedicarboxylic acid, 1,11-undecanedicarboxylic acid, and 1,12-dodecanedicarboxylic acid.<20> The rust inhibitor composition according to any one of <1> to <19>, wherein the component C includes at least one selected from saturated fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, arachidic acid, and behenic acid; 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. <21> A rust inhibitor composition containing an amine (component A) represented by the following general formula (I) and having a molecular weight of 30 to 140, a salt (component B') of a dicarboxylic acid (component B) having 6 to 22 carbon atoms with the component A, a salt (component C') of a monocarboxylic acid (component C) having 8 to 22 carbon atoms with the component A, and water (component D), wherein the component A is at least one alkanolamine selected from monoethanolamine, monoisopropanolamine, diethanolamine, and diisopropanolamine, the mass ratio of the content of the component B' to the content of the component C' (the content of the component B' / the content of the component C') is 0.1 to 2, and the content of the component C' is 0.1 to 50 mass%. (In the general formula (I), R １ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, and R ２ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, or hydrogen.) <22> A rust inhibitor composition comprising an amine (component A) represented by the following general formula (I) and having a molecular weight of 30 to 140, a dicarboxylic acid (component B) having 6 to 22 carbon atoms, a monocarboxylic acid (component C) having a hydrocarbon group having 7 to 21 carbon atoms, and water (component D), wherein the component A is at least one alkanolamine selected from monoethanolamine, monoisopropanolamine, diethanolamine, and diisopropanolamine, the mass ratio of the amount of the component C to the amount of the component B (amount of the component B / amount of the component C) is 0.1 to 1.5, and the amount of the component C is 0.3 to 40 mass%. (In the general formula (I), R１ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, and R ２ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, or hydrogen.) <23> A method for manufacturing an article, comprising a rust prevention step of forming a rust-preventive coating derived from the rust inhibitor composition according to any one of <1> to <22> on a metal surface of the article having a metal part. <24> A method for rust prevention of an article, comprising a rust prevention step of forming a rust-preventive coating derived from the rust inhibitor composition according to any one of <1> to <22> on a metal surface of the article having a metal part.

[0078] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to these examples in any way.

[0079] Examples 1-1 to 1-2 and Comparative Example 1-1 Preparation of Rust Preventive Compositions Rust preventive compositions according to Examples 1-1 to 1-2 and Comparative Example 1-1 were prepared by mixing and stirring the components in the amounts shown in Table 1, each containing the component in the amount shown in Table 1. The values ​​shown in Table 1 represent the amount of active ingredient, and are expressed in mass%.

[0080] The following components were used as the components listed in Table 1. (Amines) Diethanolamine: diethanolamine (molecular weight: 105.1) manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Monoethanolamine: 2-aminoethanol (molecular weight: 61.08) manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Triethanolamine: 2,2',2"-nitrilotriethanol (molecular weight: 149.19) manufactured by Kishida Chemical Co., Ltd. (Dicarboxylic acids) 1,10-decanedicarboxylic acid: Tokyo Chemical Industry Co., Ltd. (number of carbon atoms: 12) (Monocarboxylic acids) Oleic acid: oleic acid (number of carbon atoms: 18) manufactured by Nacalai Tesque, Inc. Myristic acid: Lunac MY-98 (number of carbon atoms: 14) manufactured by Kao Corporation Lauric acid: Lunac L-98 (number of carbon atoms: 12) (Water) Deionized water (purified with WGH200 manufactured by Yamato Scientific Co., Ltd.)

[0081] [Evaluation Method] [Measurement of pH] The pH of the rust inhibitor composition at a liquid temperature of 25°C was measured using a pH electrode (HM-30G, manufactured by DKK-TOA Corporation).

[0082] [Accelerated Rust Prevention Test] 100 g of the rust inhibitor composition was added to a 100 mL glass beaker, and a steel plate (SPCC, 50 mm x 50 mm x 0.8 mm) that had been degreased and washed with acetone was immersed in the rust inhibitor composition for 30 seconds. The steel plate was removed and dried by air blowing. The substrate was placed upright in a 30 L polypropylene box-type container, which is intended as a returnable box for transporting metal articles, and the container was placed in a high-temperature, high-humidity chamber set at a temperature of 60°C and a humidity of 95% RH. The steel plate surface was visually observed every 12 hours, and the time until rust appeared on the steel plate was measured.

[0083] [Friction Coefficient Measurement Test] A predetermined rust inhibitor (aqueous solution, if not soluble in water, an ethanol aqueous solution) was applied to either a ball (SAE-AMS6440 steel manufactured by PCS Instruments) or a disk ((Grade 28 per ISO3290) of SAE-AMS6440 steel manufactured by PCS Instruments) degreased with hexane, and then dried. The test was then placed in a diesel oil lubrication friction tester (HFRR, manufactured by PCS). The temperature was 27°C, the frequency was 10 Hz, the load was 10 g, the travel distance was 2000 μm, the measurement interval was 1 second, and the measurement time was 1800 seconds. The average value of the measured values ​​was taken as the friction coefficient.

[0084] The evaluation results are shown in Table 1.

[0085]

[0086] Examples 2-1 to 2-2 and Comparative Example 2-1 Preparation of Rust Preventive Compositions and Evaluation of Stability Water, amine, dicarboxylic acid, and monocarboxylic acid were added to a 100 mL glass vial in the amounts shown in Table 2 in this order, and the mixture was stirred at room temperature for 6 hours. After allowing to stand at room temperature for 24 hours, the appearance of the liquid was observed, and the presence or absence of separation of the components was visually confirmed.

[0087] The evaluation results are shown in Table 2.

[0088]

Claims

1. A rust inhibitor composition comprising an amine (component A) having a molecular weight of 30 to 140 and represented by the following general formula (I), a salt (component B') of a dicarboxylic acid (component B) having 6 to 22 carbon atoms with said component A, a salt (component C') of a monocarboxylic acid (component C) having 8 to 22 carbon atoms with said component A, and water (component D). (In the general formula (I), R １ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, and R ２ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, or hydrogen.

2. The rust inhibitor composition according to claim 1, wherein the content of component A is 0.1 mass % or more and 50 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 mass % or more and 50 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 said component B' to the content of said component C' (content of component B' / content of component C') is 0.1 or more and 2 or less.

7. A rust inhibitor composition comprising an amine (component A) having a molecular weight of 30 to 140 and represented by the following general formula (I), a dicarboxylic acid (component B) having 6 to 22 carbon atoms, a monocarboxylic acid having a hydrocarbon group having 7 to 21 carbon atoms (component C), and water (component D). (In the general formula (I), R １ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, and R ２ is a hydrocarbon group having 1 to 20 carbon atoms and having a hydroxy group or an ether group, or hydrogen.

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

9. A 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 (amount of component B / 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 an anti-rust coating derived from the rust inhibitor composition according to any one of claims 1 to 9 on the metal surface of the article having a metal part.

11. A method for preventing rust on an article, comprising a rust prevention step of forming a rust preventive coating derived from the rust inhibitor composition according to any one of claims 1 to 9 on the metal surface of the article having a metal part.

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