Rust-proof oil composition

Abstract

A rust preventive oil composition comprising a base oil (A), a fatty acid alkanolamide (B1), and a compound (B2) represented by the general formula (B2-1), wherein the cycloparaffin component of the base oil (A) is 35% by volume or more. 1 and R 2 are each independently a saturated or unsaturated hydrocarbon group having 4 to 26 carbon atoms. 1 ‑NH(CH2)3NH2·2R 2 ‑COOH (B2‑1)

Description

Technical Field

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

[0002] This application claims priority based on Japanese Patent Application No. 2020-133361 filed in Japan on August 5, 2020, the contents of which are incorporated herein by reference. Background Art

[0003] Conventionally, in the field of metal parts such as steel plates, bearings, steel balls, and guide rails, rust-preventive oil compositions have been used to prevent rust on the metal parts.

[0004] Metal parts made of steel primarily composed of iron are ultimately protected from rust by coating or plating, but such treatments are difficult to perform during the manufacturing process. Therefore, to temporarily prevent rust on these metal parts, they are typically treated with a rust-preventive oil composition.

[0005] Rust not only damages the appearance of products but also significantly affects their strength and precision. Therefore, a rust-proof oil composition with high rust-proof properties is in demand.

[0006] For example, Patent Document 1 discloses a rust preventive oil composition comprising: a rust preventive oil having a kinematic viscosity of 6 mm at 40°C; 2 The mineral oil with a kinematic viscosity of 250 mm / s or less at 40°C is the first mineral oil. 2 A mineral oil having a viscosity of 100 μg / s or more, namely a second mineral oil, a fatty acid amine salt or ester, and at least one rust inhibitor selected from the group consisting of a sarcosine-type compound, a nonionic surfactant, a sulfonate, an amine, a carboxylic acid, a fatty acid amine salt, a carboxylate, paraffin, an oxidized wax salt, and a boron compound. This composition is believed to have the ability to remove moisture adhering to various processed metal parts such as steel plates, bearings, steel balls, and guide rails, as well as sufficient rust prevention properties.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Laid-Open No. 2013-199670 Summary of the Invention

[0010] Problems to be solved by the invention

[0011] In recent years, there has been a demand for rust preventive oil compositions having higher rust preventive properties.

[0012] In the case of metal parts that undergo cutting, it is sometimes difficult to prevent rusting of the metal parts using rust preventive oil compositions due to the influence of the cutting oil used in the cutting process. Therefore, rust preventive oil compositions are required to have stable high rust prevention properties regardless of the product they are used on.

[0013] On the other hand, rust preventive oil compositions are used for temporary rust prevention during the manufacturing process of products and are ultimately removed, so both rust prevention and removal properties are required.

[0014] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rust preventive oil composition having excellent rust prevention properties and removability.

[0015] Means for solving problems

[0016] Conventionally, various studies have been conducted on additives in rust preventive oil compositions, but there have been few studies on the combination of additives and base oils.

[0017] To solve the above-mentioned problems, the inventors of the present invention conducted extensive research focusing on the combination of base oils and additives contained in rust preventive oil compositions. As a result, they discovered that combining a base oil having a predetermined ratio of cycloparaffin components with a specific compound could solve the above-mentioned problems, leading to the completion of the present invention. Specifically, the present invention employs the following configuration.

[0018] Specifically, a first embodiment of the present invention is a rust preventive oil composition comprising a base oil (A), a fatty acid alkanolamide (B1), and a compound (B2) represented by the following general formula (B2-1), wherein the cycloparaffin content of the base oil (A) is 35% by volume or more.

[0019] R 1 -NH(CH2)3NH2·2R 2 -COOH (B2-1)

[0020] [Where R 1 and R 2 Each independently represents a saturated or unsaturated hydrocarbon group having 4 to 26 carbon atoms.]

[0021] In the first embodiment of the present invention, it is preferred that the composition further contains a rust inhibitor (C), wherein the rust inhibitor (C) contains one or more compounds selected from the group consisting of oxidized wax salts, carboxylic acids, carboxylates other than the compound (B2), sulfonates, fatty acid esters, sarcosine compounds, amines, and boron compounds.

[0022] The rust preventive oil composition of the first embodiment of the present invention preferably has a kinematic viscosity of 0.5 mm at 40°C. 2 / s~10mm 2 / s.

[0023] In the first embodiment of the present invention, the content of the fatty acid alkanolamide (B1) is preferably 0.1% by mass to 3% by mass based on the total amount of the rust preventive oil composition.

[0024] In the first embodiment of the present invention, the content of the compound (B2) is preferably 0.5% by mass to 5% by mass based on the total amount of the rust preventive oil composition.

[0025] Effects of the Invention

[0026] According to the present invention, a rust preventive oil composition having excellent rust preventive properties and removability can be provided. DETAILED DESCRIPTION

[0027] In this specification, kinematic viscosity refers to a value measured in accordance with JIS K2283-2000 "Crude oil and petroleum products—Kinematic viscosity test method and viscosity index calculation method."

[0028] In this specification, the ratio of cycloparaffin components and paraffin components is determined based on the molecular ion intensity obtained by mass spectrometry using FI ionization (using a glass cell). The specific measurement method is as follows.

[0029] (1) An adsorption tube for elution chromatography having a diameter of 18 mm and a length of 980 mm was filled with 120 g of silica gel (Grade 923 manufactured by Fuji Silicia Chemical Co., Ltd.) having a nominal diameter of 74 to 149 μm and activated by drying at approximately 175° C. for 3 hours.

[0030] (2) Inject 75 mL of n-pentane to pre-wet the silica gel.

[0031] (3) Accurately weigh about 2 g of sample, dilute it with an equal volume of n-pentane, and inject the resulting sample solution.

[0032] (4) When the liquid level of the sample solution reaches the upper end of the silica gel, 140 mL of n-pentane is injected to separate the saturated hydrocarbon components, and the eluent is recovered from the lower end of the adsorption tube.

[0033] (5) The eluate is poured into a rotary evaporator to distill off the solvent to obtain a saturated hydrocarbon component.

[0034] (6) Saturated hydrocarbon component type analysis was performed using a mass spectrometer. FI ionization using a glass cell was employed as the ionization method in the mass spectrometer analysis, and JMS-AX505H manufactured by JEOL Ltd. was used as the mass spectrometer.

[0035] The measurement conditions are as follows.

[0036] Accelerating voltage: 3.0 kV, cathode voltage: -5 to -6 kV, resolution: approximately 500, emitter: carbon, emitter current: 5 mA, measuring range: mass number 35 to 700, auxiliary oven temperature: 300 °C, partition temperature: 300 °C, main oven temperature: 350 °C, sample injection volume: 1 μL.

[0037] The molecular ions obtained by mass spectrometry are classified into chain alkanes (C n H 2n+2 ) and cycloalkanes (C n H 2n 、C n H 2n-2 、C n H 2n-4 ...) and calculate the fraction of their respective ionic intensities to determine the content of each type relative to the total saturated hydrocarbon content. Then, based on the saturated hydrocarbon content, the content of each paraffinic and cycloparaffinic component relative to the entire sample is calculated.

[0038] Details of data processing by type analysis using FI mass spectrometry are described in "Nissin Review", Vol. 33, No. 4, pp. 135-142, particularly in the section "2.2.3 Data Processing".

[0039] In this specification, the aromatic content refers to a value measured by the fluorescent indicator adsorption method in accordance with JIS K2536-1 "Petroleum products - Testing methods for components".

[0040] (Rust-preventive oil composition)

[0041] The rust preventive oil composition of the present embodiment contains a base oil (A), a fatty acid alkanolamide (B1), and a compound (B2) represented by the following general formula (B2-1).

[0042] R 1 -NH(CH2)3NH2·2R 2 -COOH (B2-1)

[0043] [Where R 1 and R 2 Each independently represents a saturated or unsaturated hydrocarbon group having 4 to 26 carbon atoms.]

[0044] The rust preventive oil composition of this embodiment preferably has a kinematic viscosity of 0.5 mm at 40°C. 2 / s or more, more preferably 0.8mm 2 / s or more, more preferably 1mm 2 / s or more, particularly preferably 1.5 mm 2 / s or above.

[0045] On the other hand, the rust preventive oil composition of this embodiment preferably has a kinematic viscosity of 10 mm at 40°C. 2 / s or less, more preferably 8mm 2 / s or less, more preferably 5mm 2 / s or less, particularly preferably 2mm 2 / s or less.

[0046] When the rust preventive oil composition of the present embodiment has a kinematic viscosity at 40° C. of not less than the above-described preferred lower limit, the coating film strength is further improved, and the rust preventive property is further improved.

[0047] On the other hand, when the rust preventive oil composition of the present embodiment has a kinematic viscosity at 40° C. of the preferred upper limit value or less, the removability is further improved.

[0048] For example, the rust preventive oil composition of this embodiment preferably has a kinematic viscosity of 0.5 mm at 40°C. 2 / s~10mm 2 / s, more preferably 0.8mm 2 / s~8mm 2 / s, more preferably 1mm 2 / s~5mm 2 / s, particularly preferably 1.5 mm 2 / s~2mm 2 / s.

[0049] <Base Oil (A)>

[0050] The rust preventive oil composition of this embodiment contains a base oil (A).

[0051] Examples of the base oil (A) include mineral oil and synthetic oil.

[0052] Mineral Oil

[0053] Specific examples of mineral oils include those obtained by applying one or more refining methods selected from the group consisting of solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrotreating, sulfuric acid washing, and clay treatment to lubricating oil fractions obtained by atmospheric distillation or vacuum distillation of crude oil.

[0054] Synthetic Oil

[0055] Examples of the synthetic oil include polyolefins and alkylbenzenes.

[0056] Polyolefins

[0057] Examples of polyolefins include those obtained by homopolymerizing or copolymerizing olefin monomers having 2 to 16 carbon atoms, preferably 2 to 12 carbon atoms, and hydrogenated products of these polymers. The olefin monomers may be any of α-olefins, internal olefins, linear olefins, and branched olefins. Specific examples of such olefin monomers include ethylene, propylene, 1-butene, 2-butene, isobutylene, pentene, hexene, heptene, octene, nonene, decene, undecene, dodecene, tridecene, tetradecene, pentadecene, hexadecene, and mixtures thereof.

[0058] The polyolefins can be produced by known methods. For example, in addition to being produced by a thermal reaction carried out without a catalyst, the target polyolefin can also be produced by homopolymerizing or copolymerizing the olefins using known catalysts such as the following: organic peroxide catalysts such as polyolefin benzoyl peroxide; Friedel-Crafts catalysts such as aluminum chloride, aluminum chloride-polyol systems, aluminum chloride-titanium tetrachloride systems, aluminum chloride-alkyltin halide systems, and boron fluoride; Ziegler catalysts such as organoaluminum chloride-titanium tetrachloride systems and organoaluminum-titanium tetrachloride systems; metallocene catalysts such as aluminoxane-zirconocene systems and ionic compound-zirconocene systems; and Lewis acid complex catalysts such as aluminum chloride-alkali systems and boron fluoride-alkali systems.

[0059] Alkylbenzenes

[0060] Alkylbenzenes preferably have 1 to 4 alkyl groups with 1 to 40 carbon atoms in the molecule. The alkyl group of the alkylbenzene may be linear or branched, but branched alkyl groups are preferred from the viewpoints of stability, viscosity characteristics, etc., and branched alkyl groups derived from oligomers of olefins such as propylene, butene, and isobutylene are particularly preferred from the viewpoint of availability.

[0061] Among the alkylbenzenes mentioned above, the most preferred alkylbenzenes in this embodiment are those having one or two alkyl groups, i.e., monoalkylbenzenes, dialkylbenzenes, or mixtures thereof, from the viewpoints of stability and availability. Furthermore, the alkylbenzenes may be not only alkylbenzenes having a single structure but also mixtures of alkylbenzenes having different structures.

[0062] The alkylbenzene can be produced by a known method, for example, using an aromatic compound as a raw material, an alkylating agent and an alkylation catalyst.

[0063] Here, specific examples of the aromatic compound used as the raw material include benzene, toluene, xylene, ethylbenzene, methylethylbenzene, diethylbenzene, and mixtures thereof.

[0064] Specific examples of the alkylating agent include lower monoolefins such as ethylene, propylene, butene, and isobutylene. Preferred examples include linear or branched olefins having 6 to 40 carbon atoms obtained by polymerization of propylene; linear or branched olefins having 6 to 40 carbon atoms obtained by thermal decomposition of wax, heavy oil, petroleum fractions, polyethylene, polypropylene, etc.; linear olefins having 9 to 40 carbon atoms obtained by separating normal paraffins from petroleum fractions such as kerosene and light oil and olefinizing them using a catalyst; or mixtures thereof.

[0065] Examples of the alkylation catalyst during alkylation include well-known catalysts such as Friedel-Crafts catalysts such as aluminum chloride and zinc chloride; and acidic catalysts such as sulfuric acid, phosphoric acid, silicotungstic acid, hydrofluoric acid, and activated clay.

[0066] The base oil in the rust preventive oil composition of the present embodiment may be any of the above-mentioned mineral oils and / or synthetic oils, either alone or as a mixture of two or more. However, it is preferred that any of the above-mentioned mineral oils be used alone or as a mixture of two or more.

[0067] The cycloparaffin content of the base oil (A) in the rust preventive oil composition of the present embodiment is 35% by volume or more, preferably 40% by volume or more, and more preferably 45% by volume or more.

[0068] On the other hand, the cycloparaffin content of the base oil (A) in the rust preventive oil composition of the present embodiment is preferably 70% by volume or less, more preferably 65% by volume or less, and even more preferably 55% by volume or less.

[0069] When the cycloparaffin content of the base oil (A) in the rust preventive oil composition of the present embodiment is at least the above-described preferred lower limit, compatibility with the fatty acid alkanolamide (B1) described below and the compound (B2) represented by the following general formula (B2-1) is improved, thereby improving rust preventive properties.

[0070] On the other hand, when the cycloparaffin content of the base oil (A) in the rust preventive oil composition of the present embodiment is below the above-mentioned preferred upper limit, the peculiar odor caused by the cycloparaffin content can be reduced, thereby improving the working environment.

[0071] For example, the cycloparaffin content of the base oil (A) in the rust preventive oil composition of this embodiment is preferably 35 to 70% by volume, more preferably 40 to 65% by volume, and even more preferably 45 to 55% by volume.

[0072] The paraffin content of the base oil (A) in the rust preventive oil composition of the present embodiment is preferably 30% by volume or more, more preferably 35% by volume or more, and even more preferably 45% by volume or more.

[0073] On the other hand, the paraffin content of the base oil (A) in the rust preventive oil composition of the present embodiment is preferably 65% by volume or less, more preferably 60% by volume or less, and even more preferably 55% by volume or less.

[0074] When the paraffin content of the base oil (A) in the rust preventive oil composition of the present embodiment is at least the above-mentioned preferred lower limit, odor is further reduced, and the working environment is further improved.

[0075] On the other hand, when the paraffin content of the base oil (A) in the rust preventive oil composition of the present embodiment is below the preferred upper limit, compatibility with the fatty acid alkanolamide (B1) described below and the compound (B2) represented by the following general formula (B2-1) is improved, thereby further improving the rust preventive properties.

[0076] For example, the paraffin content of the base oil (A) in the rust preventive oil composition of this embodiment is preferably 30% to 65% by volume, more preferably 35% to 60% by volume, and even more preferably 45% to 55% by volume.

[0077] From the viewpoint of the working environment, the aromatic content of the base oil (A) in the rust preventive oil composition of the present embodiment is preferably 5% by volume or less, more preferably 3% by volume or less, even more preferably 1% by volume or less, particularly preferably 0.5% by volume or less, and most preferably 0.3% by volume or less.

[0078] The content of the base oil (A) in the rust preventive oil composition of the present embodiment is preferably 80% by mass or more, more preferably 90% by mass or more, and even more preferably 93% by mass or more, based on the total amount of the rust preventive oil composition.

[0079] The content of the base oil (A) in the rust preventive oil composition of the present embodiment is preferably 99% by mass or less, more preferably 98% by mass or less, based on the total amount of the rust preventive oil composition.

[0080] For example, the content of the base oil (A) in the rust preventive oil composition of the present embodiment is preferably 80 to 99 mass%, more preferably 90 to 98 mass%, and even more preferably 93 to 98 mass%.

[0081] The base oil (A) in the rust preventive oil composition of this embodiment preferably has a kinematic viscosity of 0.5 mm at 40°C. 2 / s or more, more preferably 0.8mm 2 / s or more, more preferably 1mm 2 / s or more, particularly preferably 1.5 mm 2 / s or above.

[0082] On the other hand, the kinematic viscosity of the base oil (A) in the rust preventive oil composition of this embodiment at 40° C. is preferably 10 mm 2 / s or less, more preferably 8mm 2 / s or less, more preferably 5mm 2 / s or less, particularly preferably 2mm 2 / s or less.

[0083] When the kinematic viscosity at 40° C. of the base oil (A) in the present embodiment is not less than the above-described preferred lower limit, the coating film strength is further improved, and the rust prevention property is further improved.

[0084] On the other hand, when the kinematic viscosity at 40° C. of the base oil (A) in the present embodiment is at most the preferred upper limit value described above, the removability is further improved.

[0085] For example, the kinematic viscosity of the base oil (a) in the rust preventive oil composition of the present embodiment at 40° C. is preferably 0.5 mm 2 / s~10mm 2 / s, more preferably 0.8mm 2 / s~8mm 2 / s, more preferably 1mm 2 / s~5mm 2 / s, particularly preferably 1.5 mm 2 / s~2mm 2 / s.

[0086] <Fatty acid alkanolamide (B1)>

[0087] The rust preventive oil composition of the present embodiment contains fatty acid alkanolamide (B1) (hereinafter also referred to as component (B1)).

[0088] The component (B1) can be obtained by reacting a fatty acid with an alkanolamine, for example.

[0089] ·fatty acid

[0090] The fatty acid used as the raw material for the fatty acid alkanolamide (B1) is preferably a fatty acid having 4 to 26 carbon atoms, more preferably a fatty acid having 8 to 24 carbon atoms, and even more preferably a fatty acid having 16 to 20 carbon atoms. When the number of carbon atoms is within the preferred range described above, rust prevention properties are further improved. The fatty acid may be either a saturated fatty acid or an unsaturated fatty acid, and may be either a straight-chain fatty acid or a branched-chain fatty acid.

[0091] Preferred specific examples include straight-chain saturated fatty acids such as n-butyric acid, n-hexanoic acid, n-heptanoic acid, n-octanoic acid, n-nonanoic acid, n-decanoic acid, n-undecanoic acid, n-dodecanoic acid (lauric acid), n-tridecanoic acid, n-tetradecanoic acid (myristic acid), n-pentadecanoic acid, n-hexadecanoic acid (palmitic acid), n-heptadecanoic acid, n-octadecanoic acid (stearic acid), n-eicosanoic acid (arachidic acid), behenic acid, tetracosanoic acid, and hexacosanoic acid; isoheptanoic acid, isooctanoic acid, isononanoic acid, isodecanoic acid, isundecanoic acid, Branched-chain saturated fatty acids such as isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isopentadecanoic acid, isohexadecanoic acid, isoheptadecanoic acid, isooctadecanoic acid, and isoeicosanoic acid; unsaturated fatty acids such as 9-tetradecenoic acid (myristoleic acid), 9-hexadecenoic acid (palmitoleic acid), 9-octadecenoic acid (oleic acid), eicosenoic acid, and linoleic acid (9,12-octadecadienoic acid), and mixtures thereof; naturally derived fatty acids containing one or more of these fatty acids (e.g., beef tallow, coconut oil, etc.), etc.

[0092] Alkanolamines

[0093] The alkanolamine used as a raw material for the fatty acid alkanolamide (B1) is not particularly limited as long as it is a compound having a hydroxyl group and an amino group in an alkane skeleton. Examples thereof include diethanolamine, monoethanolamine, monoisopropanolamine, dipropanolamine, dibutanolamine, and mixtures thereof. Among them, diethanolamine, monoethanolamine, and monoisopropanolamine are preferred.

[0094] Examples of the fatty acid alkanolamide (B1) obtained by reacting the above-mentioned fatty acids with alkanolamines include butyric acid diethanolamide, caproic acid diethanolamide, capric acid diethanolamide, dodecanoic acid (lauric acid) monoethanolamide, dodecanoic acid diethanolamide, dodecanoic acid isopropanolamide, octadecanoic acid diethanolamide, octadecanoic acid monoethanolamide, eicosanoic acid (arachidic acid) diethanolamide, tetracosanoic acid diethanolamide, oleic acid diethanolamide, oleic acid monoethanolamide, coconut oil fatty acid diethanolamide, coconut oil fatty acid monoethanolamide, tetradecanoic acid (myristic acid) diethanolamide, tetradecanoic acid monoethanolamide, tetradecanoic acid diethanolamide, hexadecanoic acid (palmitic acid) diethanolamide, hexadecanoic acid monoethanolamide, hexadecanoic acid monoisopropanolamide, hexadecanoic acid dipropanolamide, hexadecanoic acid dibutanolamide, isostearic acid diethanolamide, isostearic acid monoethanolamide, palm kernel oil fatty acid diethanolamide, and palm kernel oil fatty acid monoethanolamide.

[0095] Examples of the fatty acid alkanolamide (B1) obtained by reacting the above-mentioned fatty acids with alkanolamines include butyric acid diethanolamide, caproic acid diethanolamide, capric acid diethanolamide, dodecanoic acid (lauric acid) monoethanolamide, dodecanoic acid diethanolamide, dodecanoic acid isopropanolamide, octadecanoic acid diethanolamide, octadecanoic acid monoethanolamide, eicosanoic acid (arachidic acid) diethanolamide, tetracosanoic acid diethanolamide, oleic acid diethanolamide, oleic acid monoethanolamide, coconut oil fatty acid diethanolamide, coconut oil fatty acid monoethanolamide, tetradecanoic acid (myristic acid) diethanolamide, tetradecanoic acid monoethanolamide, tetradecanoic acid diethanolamide, hexadecanoic acid (palmitic acid) diethanolamide, hexadecanoic acid monoethanolamide, hexadecanoic acid monoisopropanolamide, hexadecanoic acid dipropanolamide, hexadecanoic acid dibutanolamide, isostearic acid diethanolamide, isostearic acid monoethanolamide, palm kernel oil fatty acid diethanolamide, and palm kernel oil fatty acid monoethanolamide.

[0096] As the fatty acid alkanolamide (B1) in the rust preventive oil composition of the present embodiment, from the viewpoint of further improving the rust preventive properties, among those mentioned above, preferably one or more compounds selected from the group consisting of butyric acid diethanolamide, hexanoic acid diethanolamide, capric acid diethanolamide, eicosanoic acid (arachidic acid) diethanolamide, tetracosanoic acid diethanolamide, oleic acid diethanolamide, hexadecanoic acid (palmitic acid) diethanolamide, hexadecanoic acid monoethanolamide, hexadecanoic acid monoisopropanolamide, hexadecanoic acid dipropanolamide, and hexadecanoic acid dibutanolamide are preferred. More preferably, one or more compounds selected from the group consisting of capric acid diethanolamide, eicosanoic acid (arachidic acid) diethanolamide, tetracosanoic acid diethanolamide, oleic acid diethanolamide, hexadecanoic acid (palmitic acid) diethanolamide, hexadecanoic acid monoethanolamide, and hexadecanoic acid monoisopropanolamide are preferred.

[0097] In the rust preventive oil composition of the present embodiment, the component (B1) may be used alone or in combination of two or more.

[0098] The content of the component (B1) in the rust preventive oil composition of this embodiment is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more, relative to 100% by mass of the total amount of the rust preventive oil composition.

[0099] On the other hand, the content of component (B1) is preferably less than 5 mass%, more preferably 4 mass% or less, and even more preferably 3 mass% or less, based on 100 mass% of the total amount of the rust preventive oil composition.

[0100] When the content of the component (B1) is at least the lower limit of the above-mentioned preferred range, the rust prevention property is further improved.

[0101] When the content of the component (B1) is at most the upper limit of the preferred range described above, the removability is further improved.

[0102] For example, the content of the component (B1) in the present embodiment is preferably 0.01% by mass or more and less than 5% by mass, more preferably 0.05% by mass to 4% by mass, and even more preferably 0.1% by mass to 3% by mass, relative to 100% by mass of the total amount of the rust preventive oil composition.

[0103] As a method for producing the fatty acid alkanolamide (B1), for example, the following method can be used: an alkanolamine (e.g., diethanolamine, monoethanolamine, monoisopropanolamine, etc.) is added in a 2-fold molar amount relative to a predetermined amount of fatty acid, and the mixture is heated under a nitrogen stream for dehydration condensation.

[0104] <Compound (B2)>

[0105] The rust preventive oil composition of the present embodiment contains a compound (B2) represented by the following general formula (B2-1) (hereinafter also referred to as component (B2)).

[0106] R 1 -NH(CH2)3NH2·2R 2 -COOH (B2-1)

[0107] [Where R 1 and R 2 Each independently represents a saturated or unsaturated hydrocarbon group having 4 to 26 carbon atoms.]

[0108] In formula (B2-1), R 1 It is a saturated or unsaturated hydrocarbon group having 4 to 26 carbon atoms.

[0109] Saturated hydrocarbon group with 4 to 26 carbon atoms

[0110] Examples of the saturated hydrocarbon group having 4 to 26 carbon atoms include linear alkyl groups having 4 to 26 carbon atoms and branched alkyl groups having 4 to 26 carbon atoms.

[0111] Unsaturated hydrocarbon group with 4 to 26 carbon atoms

[0112] Examples of the unsaturated hydrocarbon group having 4 to 26 carbon atoms include linear alkenyl groups having 4 to 26 carbon atoms and branched alkenyl groups having 4 to 26 carbon atoms. The position of the double bond is arbitrary.

[0113] In formula (B2-1), regarding R 1Among the above, a linear alkyl group having 10 to 18 carbon atoms is preferred, a linear alkyl group having 14 to 18 carbon atoms is more preferred, and a linear alkyl group having 16 to 18 carbon atoms is further preferred. When the number of carbon atoms is within the preferred range, the rust prevention property is further improved.

[0114] In formula (B2-1), R 2 It is a saturated or unsaturated hydrocarbon group having 4 to 26 carbon atoms.

[0115] As R 2 The saturated or unsaturated hydrocarbon group having 4 to 26 carbon atoms in the group may be any of the following: 1 The saturated or unsaturated hydrocarbon groups having 4 to 26 carbon atoms are the same.

[0116] In formula (B2-1), regarding R 2 Among the above, a saturated or unsaturated hydrocarbon group having 7 to 19 carbon atoms is preferred, a linear saturated or unsaturated hydrocarbon group having 11 to 19 carbon atoms is more preferred, and a linear alkenyl group having 17 to 19 carbon atoms is further preferred. When the number of carbon atoms is within the preferred range, the rust prevention property is further improved.

[0117] As the component (B2) in the rust preventive oil composition of the present embodiment, from the viewpoint of further improving the rust preventive property, among the above-mentioned components, N-butyl trimethylenediamine oleate, N-octyl trimethylenediamine oleate, N-decyl trimethylenediamine oleate, N-hexadecyl trimethylenediamine oleate, N-octadecyl trimethylenediamine oleate, N-eicosyl trimethylenediamine oleate, N-hexacosyl trimethylenediamine oleate, N-hexadecyl trimethylenediamine caproate, N-hexadecyl trimethylenediamine octanoate, N-hexadecyl trimethylenediamine dodecanol, N-hexadecyl trimethylenediamine dodecanoate ... More preferably, N-decyltrimethylenediamine oleate, N-hexadecyltrimethylenediamine oleate, N-octadecyltrimethylenediamine oleate, N-hexadecyltrimethylenediamine dodecanoate, N-hexadecyltrimethylenediamine hexacosanate, and further preferably, N-hexadecyltrimethylenediamine oleate, N-octadecyltrimethylenediamine oleate, N-hexadecyltrimethylenediamine dodecanoate, N-hexadecyltrimethylenediamine hexacosanate.

[0118] In the rust preventive oil composition of the present embodiment, the component (B2) may be used alone or in combination of two or more.

[0119] The content of the component (B2) in the rust preventive oil composition of the present embodiment is preferably 0.01 mass % or more, more preferably 0.1 mass % or more, and even more preferably 0.5 mass % or more, relative to 100 mass % of the total amount of the stainless steel oil composition.

[0120] On the other hand, the content of the component (B2) is preferably less than 8% by mass, more preferably 7% by mass or less, and even more preferably 5% by mass or less, based on 100% by mass of the rust preventive oil composition.

[0121] When the content of the component (B2) is at least the lower limit of the preferred range, the rust prevention property is further improved.

[0122] When the content of the component (B2) is at most the upper limit of the preferred range, the removability is further improved.

[0123] For example, the content of the component (B2) in the present embodiment is preferably 0.01% by mass or more and less than 8% by mass, more preferably 0.1% by mass to 7% by mass, and even more preferably 0.5% by mass to 5% by mass.

[0124] In the rust preventive oil composition of the present embodiment, the mass ratio of the content of component (B2) to the content of component (B1) (content of component (B2) / content of component (B1)) is preferably 0.1-15, more preferably 0.5-10.

[0125] The component (B2) can be produced by, for example, reacting a corresponding N-alkyl primary amine with acrylonitrile in a nitrogen atmosphere at 100 to 200° C. using a catalyst, followed by hydrogenation, and adding a fatty acid to the resulting N-alkyldiamine in a nitrogen atmosphere.

[0126] <Optional Ingredients>

[0127] The rust preventive oil composition of the present embodiment may further contain optional components other than the above-mentioned base oil (A), component (B1), and component (B2).

[0128] Examples of the optional components include: the rust inhibitor (C) described below; antioxidants such as phenolic antioxidants, hindered amine antioxidants, phosphorus antioxidants, sulfur antioxidants, benzotriazole antioxidants, benzophenone antioxidants, hydroxylamine antioxidants, salicylate antioxidants, and triazine antioxidants; corrosion inhibitors for improving corrosion resistance such as benzotriazole or its derivatives, thiadiazole, and benzothiazole; wetting agents such as diethylene glycol monoalkyl ether; film-forming agents such as acrylic polymers, paraffin wax, microcrystalline wax, slack wax, polyolefin wax, and petrolatum; defoaming agents such as methyl silicone, fluorosilicone, and polyacrylate; surfactants other than components (B1) and (B2); and the like.

[0129] 《Rust Inhibitor (C)》

[0130] From the viewpoint of further improving the rust prevention property, the rust preventive oil composition of the present embodiment preferably further contains a rust inhibitor (C).

[0131] The rust preventive agent (C) preferably contains at least one of oxidized wax salts, carboxylic acids, carboxylates other than the compound (B2), sulfonates, fatty acid esters, sarcosine compounds, amines, and boron compounds.

[0132] [Oxidized wax salt]

[0133] Examples of the oxidized wax salt in the rust preventive oil composition of this embodiment include salts obtained by reacting oxidized wax obtained by oxidizing wax with an alkali metal, alkaline earth metal, heavy metal, or amine to neutralize part or all of the acidic groups of the oxidized wax.

[0134] The oxidized wax used as the raw material of the oxidized wax salt is obtained by oxidizing wax. Specific examples of such wax include paraffin wax obtained by refining petroleum fractions, microcrystalline wax, petrolatum, and synthetically obtained polyolefin wax.

[0135] When the oxidized wax salt is an alkali metal salt, examples of the alkali metal used as a raw material include sodium and potassium.

[0136] When the oxidized wax salt is an alkaline earth metal salt, examples of the alkaline earth metal used as a raw material include magnesium, calcium, and barium.

[0137] When the oxidized wax salt is a heavy metal salt, the heavy metal used as a raw material includes zinc, lead, etc. From the viewpoint of safety to the human body and biological system, the oxidized wax salt is preferably not a barium salt or a heavy metal salt.

[0138] When the oxidized wax salt is an amine salt, examples of the amine include monoamines, polyamines, and alkanolamines.

[0139] Monoamine

[0140] Specific examples of the monoamine include alkylamines, alkenylamines, monoamines having an alkyl group and an alkenyl group, aromatic-substituted alkylamines, cycloalkylamines, monoamines having an alkyl group and a cycloalkyl group, alkylcycloalkylamines, and amines derived from oils and fats (such as tallow amine).

[0141] More specifically, examples of the alkylamine include monomethylamine, dimethylamine, trimethylamine, monoethylamine, diethylamine, triethylamine, monopropylamine, dipropylamine, tripropylamine, monobutylamine, dibutylamine, tributylamine, monopentylamine, dipentylamine, tripentylamine, monohexylamine, dihexylamine, monoheptylamine, diheptylamine, monooctylamine, dioctylamine, monononylamine, monodecylamine, monoundecylamine, monododecylamine, monotridecylamine, monotetradecylamine, monopentadecylamine, monohexadecylamine, monoheptadecylamine, monooctadecylamine, monononadecylamine, monoeicosylamine, monoheneicosylamine, monodocosylamine, and monotricosylamine. , dimethyl(ethyl)amine, dimethyl(propyl)amine, dimethyl(butyl)amine, dimethyl(pentyl)amine, dimethyl(hexyl)amine, dimethyl(heptyl)amine, dimethyl(octyl)amine, dimethyl(nonyl)amine, dimethyl(decyl)amine, dimethyl(undecyl)amine, dimethyl(dodecyl)amine, dimethyl(tridecyl)amine, dimethyl(tetradecyl)amine, dimethyl(pentadecyl)amine, dimethyl(hexadecyl)amine, dimethyl(heptadecyl)amine, dimethyl(octadecyl)amine, dimethyl(nonadecyl)amine, dimethyl(eicosyl)amine, dimethyl(heneicosyl)amine, and dimethyl(tricosyl)amine.

[0142] More specifically, the alkenylamines include monovinylamine, divinylamine, trivinylamine, monopropenylamine, dipropenylamine, tripropenylamine, monobutenylamine, dibutenylamine, tributenylamine, monopentenylamine, dipentenylamine, tripentenylamine, monohexenylamine, dihexenylamine, monoheptenylamine, diheptenylamine, monooctenylamine, dioctenylamine, monononenylamine, monodecenylamine, monoundecenylamine, monododecenylamine, monotridecenylamine, monotetradecenylamine, monopentadecenylamine, monohexadecenylamine, monoheptadecenylamine, monooctadecenylamine, monononadecenylamine, monoeicosenylamine, monohexenecanylamine, monodocosecenylamine, and monotricosecenylamine.

[0143] More specific examples of the monoamine having an alkyl group and an alkenyl group include dimethyl(vinyl)amine, dimethyl(propylene)amine, dimethyl(butenyl)amine, dimethyl(pentenyl)amine, dimethyl(hexenyl)amine, dimethyl(heptenyl)amine, dimethyl(octenyl)amine, dimethyl(nonenyl)amine, dimethyl(decenyl)amine, dimethyl(undecenyl)amine, dimethyl(dodecenyl)amine, dimethyl(tridecenyl)amine, dimethyl(tetradecenyl)amine, dimethyl(pentadecenyl)amine, dimethyl(hexadecenyl)amine, dimethyl(heptadecenyl)amine, dimethyl(octadecenyl)amine, dimethyl(nonadecenyl)amine, dimethyl(eicosenyl)amine, dimethyl(heneicosenyl)amine, and dimethyl(tricosenyl)amine.

[0144] More specific examples of the aromatic substituted alkylamine include monobenzylamine, (2-phenylethyl)amine (also known as monophenylethylamine), dibenzylamine, bis(1-phenylethyl)amine, and bis(2-phenylethyl)amine (also known as diphenylethylamine).

[0145] More specific examples of the cycloalkylamine include monocyclopentylamine, dicyclopentylamine, tricyclopentylamine, monocyclohexylamine, dicyclohexylamine, monocycloheptylamine, and dicycloheptylamine.

[0146] More specific examples of the monoamine having an alkyl group and a cycloalkyl group include dimethyl(cyclopentyl)amine, dimethyl(cyclohexyl)amine, and dimethyl(cycloheptyl)amine.

[0147] More specific examples of the alkylcycloalkylamine include (methylcyclopentyl)amine, bis(methylcyclopentyl)amine, (dimethylcyclopentyl)amine, bis(dimethylcyclopentyl)amine, (ethylcyclopentyl)amine, bis(ethylcyclopentyl)amine, (methylethylcyclopentyl)amine, bis(methylethylcyclopentyl)amine, (diethylcyclopentyl)amine, (methylcyclohexyl)amine, bis(methylcyclohexyl)amine, (dimethylcyclohexyl)amine, bis(dimethylcyclohexyl)amine, (ethylcyclohexyl)amine, bis(ethylcyclohexyl)amine, (methylethylcyclohexyl)amine, (diethylcyclohexyl)amine, (methylcycloheptyl)amine, bis(methylcycloheptyl)amine, (dimethylcycloheptyl)amine, (ethylcycloheptyl)amine, (methylethylcycloheptyl)amine, and (diethylcycloheptyl)amine.

[0148] Polyamines

[0149] Specific examples of the polyamine include alkylene polyamines, N-alkylethylenediamine, N-alkenylethylenediamine, N-alkyl or N-alkenylalkylene polyamines, and polyamines derived from oils and fats (such as tallow polyamine).

[0150] More specific examples of the alkylene polyamine include ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, propylenediamine, dipropylenetriamine, tripropylenetetramine, tetrapropylenepentamine, pentapropylenehexamine, butylenediamine, dibutylenetriamine, tributylenetetramine, tetrabutylenepentamine, and pentabutylenehexamine.

[0151] More specific examples of the N-alkylethylenediamine include N-methylethylenediamine, N-ethylethylenediamine, N-propylethylenediamine, N-butylethylenediamine, N-pentylethylenediamine, N-hexylethylenediamine, N-heptylethylenediamine, N-octylethylenediamine, N-nonylethylenediamine, N-decylethylenediamine, N-undecylethylenediamine, N-dodecylethylenediamine, N-tridecylethylenediamine, N-tetradecylethylenediamine, N-pentadecylethylenediamine, N-hexadecylethylenediamine, N-heptadecylethylenediamine, N-octadecylethylenediamine, N-nonadecylethylenediamine, N-eicosylethylenediamine, N-heneicosylethylenediamine, N-docosylethylenediamine, and N-tricosylethylenediamine.

[0152] More specific examples of the N-alkenylethylenediamine include N-vinylethylenediamine, N-propyleneethylenediamine, N-butenylethylenediamine, N-pentenylethylenediamine, N-hexenylethylenediamine, N-heptenylethylenediamine, N-octenylethylenediamine, N-nonenylethylenediamine, N-decenylethylenediamine, N-undecenylethylenediamine, N-undecenylethylenediamine, N-dodecenylethylenediamine, N-tridecenylethylenediamine, N-tetradecenylethylenediamine, N-pentadecenylethylenediamine, N-hexadecenylethylenediamine, N-heptadecenylethylenediamine, N-octadecenylethylenediamine, N-nonadecenylethylenediamine, N-eicosenylethylenediamine, N-heneicosenylethylenediamine, N-docoseenylethylenediamine, and N-tricoseenylethylenediamine.

[0153] More specifically, examples of the N-alkyl or N-alkenyl alkylene polyamine include N-alkyldiethylenetriamine, N-alkenyldiethylenetriamine, N-alkyltriethylenetetramine, N-alkenyltriethylenetetramine, N-alkyltetraethylenepentamine, N-alkenyltetraethylenepentamine, N-alkylpentaethylenehexamine, N-alkenylpentaethylenehexamine, N-alkylpropylenediamine, N-alkenylpropylenediamine, N-alkyldipropylenetriamine, N-alkenyldipropylenetriamine, N-alkyltripropylenetetramine, The alkyl group and the alkenyl group include alkyl groups having 1 to 30 carbon atoms.

[0154] Alkanolamines

[0155] Specific examples of the alkanolamine include monomethanolamine, dimethanolamine, trimethanolamine, monoethanolamine, diethanolamine, triethanolamine, mono(n-propanol)amine, di(n-propanol)amine, tri(n-propanol)amine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, monobutanolamine, dibutanolamine, tributanolamine, monopentanolamine, dipentanolamine, tripentanolamine, monohexanolamine, dihexanolamine, monoheptanolamine, diheptanolamine, monooctanolamine, monononanolamine, monodecanolamine, monoundecanolamine, monododecanolamine, monotridecanolamine, monotetradecanolamine, monopentadecanolamine, monohexadecanolamine, diethylmonoethanolamine, diethylmonopropanol ... Ethyl monobutanolamine, diethyl monopentanolamine, dipropyl monoethanolamine, dipropyl monopropanolamine, dipropyl monobutanolamine, dipropyl monopentanolamine, dibutyl monoethanolamine, dibutyl monopropanolamine, dibutyl monobutanolamine, dibutyl monopentanolamine, monoethyl diethanolamine, monoethyl dipropanolamine, monoethyl dibutanolamine, monoethyl dipentanolamine, monopropyl diethanolamine, monopropyl dipropanolamine, monopropyl dipentanolamine, monopropyl diethanolamine, monobutyl dipropanolamine, monobutyl dibutanolamine, monobutyl dipentanolamine, monocyclohexyl monoethanolamine, monocyclohexyl diethanolamine, monocyclohexyl monopropanolamine, monocyclohexyl dipropanolamine, etc.

[0156] When the oxidized wax salt is an amine salt, the amine is preferably a monoamine among the above-mentioned amines from the viewpoint of further improving stain resistance. Among these, alkylamines, monoamines having an alkyl group and an alkenyl group, monoamines having an alkyl group and a cycloalkyl group, cycloalkylamines, and alkylcycloalkylamines are more preferred. Furthermore, amines having a total of 3 or more carbon atoms in the amine molecule are preferred, and amines having a total of 5 or more carbon atoms in the amine molecule are more preferred.

[0157] From the viewpoint of further improving the rust preventive properties, the oxidized wax salt in the rust preventive oil composition of the present embodiment is preferably an alkaline earth metal salt of an oxidized wax or an amine salt of an oxidized wax, and more preferably a calcium salt of an oxidized wax or an alkylamine salt of an oxidized wax having 5 or more carbon atoms (such as a monooctylamine salt of a polyolefin wax).

[0158] [carboxylic acid]

[0159] Examples of the carboxylic acid in the rust preventive oil composition of the present embodiment include fatty acids, dicarboxylic acids, hydroxy fatty acids, cyclohexane acids, resin acids, oxidized waxes, and lanolin fatty acids.

[0160] ·fatty acid

[0161] The fatty acid in the rust preventive oil composition of this embodiment is preferably a fatty acid having 6 to 24 carbon atoms, more preferably a fatty acid having 10 to 22 carbon atoms. The fatty acid may be a saturated fatty acid or an unsaturated fatty acid, and may be a linear fatty acid or a branched fatty acid.

[0162] Preferred specific examples include: straight-chain saturated fatty acids such as n-hexanoic acid, n-heptanoic acid, n-octanoic acid, n-nonanoic acid, n-decanoic acid, n-undecanoic acid, n-dodecanoic acid (lauric acid), n-tridecanoic acid, n-tetradecanoic acid (myristic acid), n-pentadecanoic acid, n-hexadecanoic acid (palmitic acid), n-heptadecanoic acid, n-octadecanoic acid (stearic acid), n-eicosanoic acid (arachidic acid), behenic acid, tetracosanoic acid, and hexadecanoic acid; isoheptanoic acid, isooctanoic acid, isononanoic acid, isodecanoic acid, isundecanoic acid, isododecanoic acid, Branched-chain saturated fatty acids such as decanoic acid, isotridecanoic acid, isotetradecanoic acid, isopentadecanoic acid, isohexadecanoic acid, isoheptadecanoic acid, isooctadecanoic acid, and isoeicosanoic acid; unsaturated fatty acids such as 9-tetradecenoic acid (myristoleic acid), 9-hexadecenoic acid (palmitoleic acid), 9-octadecenoic acid (oleic acid), eicosenoic acid, and 9,12-octadecadienoic acid (linoleic acid), and mixtures thereof; naturally derived fatty acids containing one or more of these fatty acids (e.g., beef tallow, coconut oil, etc.), etc.

[0163] Dicarboxylic acid

[0164] Dicarboxylic acid is a compound having two carboxyl groups.

[0165] The dicarboxylic acid is preferably a dicarboxylic acid having 2 to 40 carbon atoms, more preferably a dicarboxylic acid having 5 to 36 carbon atoms. Among them, a dimer acid obtained by dimerizing an unsaturated fatty acid having 6 to 18 carbon atoms, or an alkyl or alkenyl succinic acid is preferred.

[0166] Examples of the dimer acid include carboxylic acids produced by dimerization of oleic acid.

[0167] As the alkyl or alkenyl succinic acid, an alkenyl succinic acid having an alkenyl group having 8 to 18 carbon atoms is more preferred.

[0168] Hydroxy fatty acids

[0169] The hydroxy fatty acid is a fatty acid having one or more hydroxyl groups. The number of hydroxy fatty acids having hydroxyl groups is preferably 1 to 3.

[0170] Specific examples of the hydroxy fatty acid having 12 to 48 carbon atoms include ricinoleic acid and the like.

[0171] ·Cyclohexane acid

[0172] Naphthenic acid is a carboxylic acid in petroleum, which is formed by bonding a carboxyl group to a cycloalkane ring.

[0173] Resin acid

[0174] Resin acids are carboxylic acids found in natural resins.

[0175] Specific examples of the resin acid include abietic acid, pimaric acid, levorotatory pimaric acid, neoabietic acid, and palustric acid.

[0176] Oxidized wax

[0177] Oxidized wax is obtained by oxidizing wax. Specific examples of such wax include paraffin wax obtained by refining petroleum fractions, microcrystalline wax, petrolatum, and synthetically obtained polyolefin wax.

[0178] Lanolin fatty acids

[0179] Lanolin fatty acid is a carboxylic acid obtained by purifying (hydrolysis, etc.) the waxy substance adhering to wool.

[0180] From the viewpoint of further improving the rust preventive properties, the carboxylic acid in the rust preventive oil composition of the present embodiment is preferably a dicarboxylic acid or lanolin fatty acid, more preferably a dimer acid or lanolin fatty acid, and still more preferably a dimer acid of oleic acid or lanolin fatty acid.

[0181] [Carboxylates]

[0182] The carboxylate in the rust preventive oil composition of this embodiment is a carboxylate other than the compound (B2). Specifically, examples include alkali metal salts of the above-mentioned carboxylic acids, alkaline earth metal salts of the above-mentioned carboxylic acids, and amine salts of the above-mentioned carboxylic acids. Examples of the alkali metal, alkaline earth metal, and amine constituting the carboxylate include the same alkali metals, alkaline earth metals, and amines as exemplified in the description of the oxidized wax salt.

[0183] As the carboxylate in the rust preventive oil composition of the present embodiment, among those mentioned above, the alkali metal salts of the carboxylic acid or the alkaline earth metal salts of the carboxylic acid are preferred, and the alkaline earth metal salts of the carboxylic acid are more preferred.

[0184] More specifically, the carboxylate in the rust preventive oil composition of the present embodiment is preferably an alkaline earth metal salt of lanolin fatty acid or an alkali metal salt of ricinoleic acid, more preferably an alkaline earth metal salt of lanolin fatty acid, and still more preferably a calcium salt of lanolin fatty acid.

[0185] [Sulfonate]

[0186] Examples of the sulfonate in the rust preventive oil composition of the present embodiment include alkali metal sulfonates, alkaline earth metal sulfonates, and amine sulfonates.

[0187] The sulfonate in this embodiment can be obtained by reacting an alkali metal, an alkaline earth metal, or an amine with a sulfonic acid.

[0188] Alkali metals

[0189] As the alkali metal used as a raw material for the alkali metal sulfonate, sodium and potassium are preferred.

[0190] Alkaline earth metals

[0191] As the alkaline earth metal used as a raw material for the alkaline earth metal sulfonate, magnesium, calcium, and barium are preferred, and calcium and barium are more preferred.

[0192] ·amine

[0193] Examples of the amine used as a raw material for the sulfonic acid amine salt include the same amines as exemplified in the description of the amine salt of the oxidized wax.

[0194] Sulfonic acid

[0195] As the sulfonic acid used as the raw material of the sulfonate, a known one produced by a conventional method can be used, and specific examples thereof include petroleum sulfonic acid and synthetic sulfonic acid.

[0196] Petroleum sulfonic acid

[0197] Petroleum sulfonic acid generally refers to a substance obtained by sulfonating alkyl aromatic compounds in the lubricating oil fraction of mineral oil, or a petroleum sulfonic acid produced as a by-product during the production of white oil.

[0198] Synthetic sulfonic acid

[0199] Examples of synthetic sulfonic acids include byproducts from alkylbenzene manufacturers, which are used as raw materials for detergents, etc.; products obtained by sulfonating alkylbenzenes having linear or branched alkyl groups obtained by alkylating polyolefins with benzene; and products obtained by sulfonating alkylnaphthalenes such as dinonylnaphthalene. The molecular weight of these sulfonic acids is not particularly limited, but preferably, a molecular weight of 100 to 1500 is used, more preferably 200 to 700.

[0200] Among the above-mentioned sulfonic acids, it is preferred to use at least one selected from the group consisting of the following sulfonic acids: dialkylnaphthalenesulfonic acids in which the total number of carbon atoms of the two alkyl groups bonded to the naphthalene ring is 14 to 30; dialkylbenzenesulfonic acids in which the two alkyl groups bonded to the benzene ring are each a linear alkyl group or a branched alkyl group having one side chain methyl group, and the total number of carbon atoms of the two alkyl groups is 14 to 30; and monoalkylbenzenesulfonic acids in which the alkyl group bonded to the benzene ring has 15 or more carbon atoms.

[0201] ···Dialkylnaphthalenesulfonic acid

[0202] Regarding dialkylnaphthalenesulfonic acids in which the total number of carbon atoms of the two alkyl groups bonded to the naphthalene ring is 14 to 30, demulsibility is further improved when the total number of carbon atoms of the two alkyl groups is 14 or more. On the other hand, storage stability is further improved when the total number of carbon atoms of the two alkyl groups is 30 or less. The two alkyl groups may each be linear or branched. Furthermore, if the total number of carbon atoms of the two alkyl groups is 14 to 30, the number of carbon atoms of each alkyl group is not particularly limited, but preferably each alkyl group has 6 to 18 carbon atoms.

[0203] ···Dialkylbenzenesulfonic acid

[0204] Regarding dialkylbenzenesulfonic acids in which the two alkyl groups bonded to the benzene ring are each a linear alkyl group or a branched alkyl group having one side chain methyl group, and the total number of carbon atoms of the two alkyl groups is 14 to 30, demulsibility is further improved when the number of carbon atoms of the alkyl groups is 14 or more. On the other hand, storage stability is further improved when the number of carbon atoms of the alkyl groups is 30 or less. While the total number of carbon atoms of the two alkyl groups bonded to the benzene ring is 14 to 30, the number of carbon atoms of each alkyl group is not particularly limited, but preferably each alkyl group has 6 to 18 carbon atoms.

[0205] ···Monoalkylbenzenesulfonic acid

[0206] Regarding monoalkylbenzenesulfonic acids in which the number of carbon atoms of one alkyl group bonded to the benzene ring is 15 or more, storage stability is further improved when the number of carbon atoms is 14 or more. The alkyl group bonded to the benzene ring may be linear or branched.

[0207] Specific examples of the sulfonates obtained using the above-mentioned raw materials include the following. That is, neutral (medium salt) sulfonates obtained by reacting an alkali metal base (alkali metal oxide or hydroxide, etc.), an alkaline earth metal base (alkaline earth metal oxide or hydroxide, etc.), or an amine (ammonia, alkylamine, or alkanolamine, etc.) with a sulfonic acid; basic sulfonates obtained by heating the above-mentioned neutral (medium salt) sulfonates and an excess of an alkali metal base, an alkaline earth metal base, or an amine in the presence of water; carbonate overbased (superbased) sulfonates obtained by reacting the above-mentioned neutral (medium salt) sulfonates with an alkali metal base, an alkaline earth metal base, or an amine in the presence of carbon dioxide; borate overbased (superbased) sulfonates obtained by reacting the above-mentioned neutral (medium salt) sulfonates with an alkali metal base, an alkaline earth metal base, or an amine and a boric acid compound such as boric acid or boric anhydride, or by reacting the above-mentioned carbonate overbased (superbased) sulfonates with a boric acid compound such as boric acid or boric anhydride; and mixtures thereof.

[0208] When producing the above-mentioned neutral (medium salt) sulfonate, the target sulfonate can be obtained by adding a chloride of the same alkali metal, alkaline earth metal, or amine as the target sulfonate as a reaction accelerator, or by preparing a neutral (medium salt) sulfonate of an alkali metal, alkaline earth metal, or amine different from the target sulfonate and then adding a chloride of the same alkali metal, alkaline earth metal, or amine as the target sulfonate to carry out an exchange reaction.

[0209] As the sulfonate in the rust preventive oil composition of the present embodiment, among those mentioned above, preferably an alkali metal dialkylbenzenesulfonate, an alkaline earth metal dialkylbenzenesulfonate, or an amine dialkylbenzenesulfonate, more preferably an alkaline earth metal dialkylbenzenesulfonate, and still more preferably calcium dialkylbenzenesulfonate or barium dialkylbenzenesulfonate.

[0210] [Fatty acid esters]

[0211] Examples of the fatty acid ester in the rust preventive oil composition of the present embodiment include partial esters of polyhydric alcohols, esterified oxidized waxes, esterified lanolin fatty acids, and alkyl or alkenyl succinic acid esters.

[0212] Partial esters of polyols

[0213] The partial ester of a polyol is an ester in which at least one hydroxyl group in the polyol is not esterified but remains in the form of a hydroxyl group.

[0214] Examples of polyols as raw materials for partial esters of polyols include polyols having preferably 2 to 10 hydroxyl groups in the molecule, more preferably 3 to 6. Furthermore, preferred polyols include those having 2 to 20 carbon atoms, more preferably 3 to 10 carbon atoms.

[0215] Among these polyols, at least one polyol selected from the group consisting of glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, and sorbitan is preferably used.

[0216] The carboxylic acid serving as a raw material for the partial ester of a polyol preferably has 2 to 30 carbon atoms, more preferably 6 to 24 carbon atoms, and even more preferably 10 to 22 carbon atoms.

[0217] The carboxylic acid may be a saturated carboxylic acid or an unsaturated carboxylic acid, and may be a linear carboxylic acid or a branched carboxylic acid.

[0218] Specifically, saturated fatty acids such as acetic acid, propionic acid, butyric acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, eicosanoic acid, docosanoic acid, tetracosanoic acid, hexacosanoic acid, octacosanoic acid, and triacontanic acid; and unsaturated fatty acids such as dodecenoic acid, tetradecenoic acid, pentadecenoic acid, hexadecenoic acid (palmitoleic acid, etc.), heptadecenoic acid, octadecenoic acid (oleic acid, linoleic acid, etc.), eicosenoic acid, heneicosenoic acid, docosenoic acid, tricosenoic acid, and tetracosenoic acid can be listed.

[0219] Esterified oxidized wax

[0220] The esterified oxidized wax is obtained by reacting an oxidized wax with an alcohol to esterify part or all of the acidic groups in the oxidized wax.

[0221] Examples of the oxidized wax used as a raw material for esterifying the oxidized wax include the same oxidized waxes as exemplified in the description of the oxidized wax salts.

[0222] Examples of the alcohols used as a raw material for esterifying the oxidized wax include linear or branched saturated monohydric alcohols having 1 to 20 carbon atoms, linear or branched unsaturated monohydric alcohols having 1 to 20 base atoms, the polyhydric alcohols exemplified in the description of the fatty acid esters, and alcohols obtained by hydrolysis of lanolin fatty acids.

[0223] Esterified lanolin fatty acids

[0224] Esterified lanolin fatty acid refers to a substance obtained by reacting a waxy substance adhering to wool with lanolin fatty acid purified by hydrolysis or the like, and an alcohol. Examples of the alcohol used as a raw material for esterified lanolin fatty acid include the alcohols exemplified in the description of the esterified oxidized wax. Among these, polyhydric alcohols are preferred, and trimethylolpropane, trimethylolethane, sorbitan, pentaerythritol, and glycerol are more preferred.

[0225] Alkyl or alkenyl succinate

[0226] Examples of the alkyl or alkenyl succinic acid esters include esters of the above-mentioned alkyl or alkenyl succinic acids with monohydric alcohols or dihydric or higher polyhydric alcohols, among which esters of monohydric alcohols or dihydric alcohols are preferred.

[0227] The monohydric alcohol may be linear or branched, and may be saturated or unsaturated.

[0228] Specific examples of the monohydric alcohol include: linear saturated alcohols such as methanol, ethanol, propanol, butanol, octanol, nonanol, decanol, undecanol, dodecanol (lauryl alcohol), tridecanol, tetradecanol (myristyl alcohol), pentadecanol, cetyl alcohol (palmityl alcohol), heptadecyl alcohol, octyl alcohol (stearyl alcohol), nonadecanol, eicosanol (arachidyl alcohol), heneicosanol, docosanol (behenyl alcohol), tricosanol, tetracosanol, and pentacosanol; branched saturated alcohols such as 2-ethylhexanol, isostearyl alcohol, and 2-n-octyl-1-dodecanol; and linear unsaturated alcohols such as cis-9-hexadecen-1-ol (palmitoleyl alcohol), 9E-octadecen-1-ol (elidal alcohol), cis-9-octadecen-1-ol (oleyl alcohol), and 9Z,12Z-octadecadien-1-ol (linoleyl alcohol).

[0229] As the monohydric alcohol, among those mentioned above, linear saturated alcohols having 8 to 18 carbon atoms are preferred.

[0230] As the diol, alkylene glycol and polyoxyalkylene glycol are preferred.

[0231] Examples of the alkylene glycol include ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, heptanediol, octanediol, nonanediol, and decanediol.

[0232] Examples of the polyoxyalkylene glycol include those obtained by homopolymerization or copolymerization of ethylene oxide, propylene oxide, and butylene oxide.

[0233] When oxyalkylene groups of different structures are copolymerized in the polyoxyalkylene glycol, the polymerization form of the oxyalkylene groups is not particularly limited and may be either random copolymerization or block copolymerization.

[0234] The degree of polymerization of the polyoxyalkylene glycol is preferably 2-10, more preferably 2-8, and even more preferably 2-6.

[0235] The alkyl or alkenyl succinic acid ester in the rust preventive oil composition of the present embodiment may be a diester (complete ester) in which both -COOH groups of the alkyl or alkenyl succinic acid are esterified, or a monoester (partial ester) in which only one of the -COOH groups is esterified.

[0236] As for the alkyl or alkenyl succinate in the rust preventive oil composition of the present embodiment, among those mentioned above, monoester is preferred from the viewpoint of further improving the rust preventive property.

[0237] As the fatty acid ester in the rust preventive oil composition of the present embodiment, among those mentioned above, partial esters of polyhydric alcohols or esterified lanolin fatty acids are preferred, and sorbitan monooleate or pentaerythritol lanolin fatty acid ester (furfuryl) is more preferred.

[0238] [Sarcosine compounds]

[0239] As the sarcosine compound in the rust preventive oil composition of the present embodiment, compounds represented by the following general formulae (S-1) to (S-3) are preferred.

[0240] R 3 -CO-NR 4 -(CH2)n-COOX (S-1)

[0241] (R 3 -CO-NR 4 -(CH2)n-COO) m Y (S-2)

[0242] (R 3 -CO-NR 4 -(CH2)n-COO) m -Z-(OH) m’ (S-3)

[0243] [In formulas (S-1) to (S-3), R 3 is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms, R 4 is an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 to 4.

[0244] In formula (S-1), X is a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an alkenyl group having 1 to 30 carbon atoms.

[0245] In formula (S-2), Y is an alkali metal or an alkaline earth metal. When Y is an alkali metal, m is 1, and when Y is an alkaline earth metal, m is 2.

[0246] In formula (S-3), Z is a residue obtained by removing a hydroxyl group from a divalent or higher polyol, m is an integer greater than 1, m' is an integer greater than 0, and m+m' represents the valence of Z.]

[0247] In the above formulas (S-1) to (S-3), R 3 It is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms, preferably an alkyl group having 7 to 24 carbon atoms or an alkenyl group having 7 to 24 carbon atoms, and more preferably an alkyl group having 8 to 20 carbon atoms or an alkenyl group having 8 to 20 carbon atoms. These alkyl groups may be linear or branched. These alkenyl groups may be linear or branched, and the position of the double bond is also arbitrary.

[0248] In the above formulas (S-1) to (S-3), R 4The alkyl group is an alkyl group having 1 to 4 carbon atoms. From the viewpoint of storage stability, an alkyl group having 1 to 3 carbon atoms is preferred, and an alkyl group having 1 or 2 carbon atoms is more preferred.

[0249] In the above formulae (S-1) to (S-3), n is an integer of 4 or less, preferably 3 or less, and more preferably 2 or less, from the viewpoint of storage stability.

[0250] In the above formula (S-1), the alkyl group having 1 to 30 carbon atoms or the alkenyl group having 1 to 30 carbon atoms in X is preferably an alkyl group having 1 to 20 carbon atoms or an alkenyl group having 1 to 20 base atoms, and more preferably an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 1 to 10 carbon atoms, from the viewpoint of improving storage stability. These alkyl groups may be linear or branched. These alkenyl groups may be linear or branched, and the position of the double bond is also arbitrary.

[0251] In the above formula (S-1), X is, among those mentioned above, preferably a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an alkenyl group having 1 to 20 carbon atoms, more preferably a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and even more preferably a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, from the viewpoint of further improving rust prevention.

[0252] In the above formula (S-2), Y is an alkali metal or an alkaline earth metal, preferably sodium, potassium, magnesium, calcium or barium, more preferably magnesium or calcium.

[0253] In the above formula (S-3), Z is a residue obtained by removing a hydroxyl group from a polyol having a valence of 2 or more. Examples of the polyol include diols such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,2-butanediol, neopentyl glycol, 1,6-hexanediol, 1,2-octanediol, 1,8-octanediol, isoprene glycol, 3-methyl-1,5-pentanediol, sorbitol, catechol, resorcinol, hydroquinone, bisphenol A, bisphenol F, hydrogenated bisphenol A, hydrogenated bisphenol F, and dimer glycol; and glycerol, 2-(hydroxymethyl)-1,3-propanediol, 1,2,3-butanetriol, 1,2,3-pentanetriol, 2-methyl-1,2,3-propanetriol, 2-methyl-2,3,4-butanetriol, 2-ethyl-1,2,3-butanetriol, 2,3,4-pentanetriol, Triols such as 2,3,4-hexanetriol, 4-propyl-3,4,5-heptanetriol, 2,4-dimethyl-2,3,4-pentanetriol, 1,2,4-butanetriol, 1,2,4-pentanetriol, trimethylolethane, and trimethylolpropane; tetraols such as pentaerythritol, erythritol, 1,2,3,4-pentanethritol, 2,3,4,5-hexanetetraol, 1,2,4,5-pentanethritol, 1,3,4,5-hexanetetraol, diglycerol, and sorbitan; pentaols such as ribitol, arabitol, xylitol, and triglycerol; hexaols such as dipentaerythritol, sorbitol, mannitol, iditol, inositol, dulcitol, talose, and allose; and polyglycerols or dehydrated condensates thereof.

[0254] In the above formula (S-3), m and m' represent that all of the hydroxyl groups of the polyol in Z may be substituted, or only a part thereof may be substituted.

[0255] As the sarcosine compound in the rust preventive oil composition of the present embodiment, among those mentioned above, from the viewpoint of further improving the rust preventive properties, the compound represented by either formula (S-1) or (S-2) is preferred, the compound represented by formula (S-1) is more preferred, and N-oleoylsarcosine is even more preferred.

[0256] [amine]

[0257] Examples of the amine in the rust preventive oil composition of the present embodiment include the same amines as exemplified in the description of the oxidized wax salt.

[0258] As the amine in the rust preventive oil composition of the present embodiment, among the above-mentioned amines, a monoamine is preferred, an alkylamine or a cycloalkylamine is more preferred, and monooctylamine or dicyclohexylamine is even more preferred.

[0259] [Boron compounds]

[0260] Specifically, preferably, as the boron compound in the rust preventive oil composition of the present embodiment, calcium borate is used.

[0261] In the rust preventive oil composition of the present embodiment, the rust preventive agent (C) may be used alone or in combination of two or more.

[0262] Among the above-mentioned rust inhibitors, the rust inhibitor (C) preferably contains at least one of an oxidized wax salt, a carboxylic acid, a carboxylate other than the compound (B2), a sulfonate, a fatty acid ester, and a sarcosine compound, from the viewpoint of further improving the rust prevention property. It is more preferred that the rust inhibitor (C) contains at least one of a carboxylic acid, a carboxylate other than the compound (B2), a sulfonate, and a sarcosine compound, and it is even more preferred that the rust inhibitor (C) contains at least one of a carboxylic acid and a sarcosine compound.

[0263] In the rust preventive oil composition of this embodiment, the content of the rust preventive agent (C) is preferably 0.01 mass % or more, more preferably 0.1 mass % or more, and even more preferably 0.5 mass % or more, relative to 100 mass % of the total amount of the rust preventive oil composition.

[0264] On the other hand, the content of the rust preventive agent (C) is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less, based on 100% by mass of the total amount of the rust preventive oil composition.

[0265] When the content of the rust preventive agent (C) is at least the lower limit of the preferred range, the rust preventive property is further improved.

[0266] When the content of the rust preventive agent (C) is at most the upper limit of the preferred range, the removability is further improved.

[0267] For example, the content of the rust preventive agent (C) in this embodiment is preferably 0.01 to 10% by mass, more preferably 0.1 to 5% by mass, and even more preferably 0.5 to 3% by mass, relative to 100% by mass of the total amount of the rust preventive oil composition.

[0268] The rust preventive oil composition of the present embodiment described above contains the base oil (A), the component (B1), and the component (B2).

[0269] Components (B1) and (B2) in the rust preventive oil composition of this embodiment have a specific structure that allows them to be easily adsorbed on the surface of metal parts. Furthermore, to improve compatibility with components (B1) and (B2), the base oil in the rust preventive oil composition of this embodiment employs a base oil (A) containing 35% by volume or more of a cycloparaffin component.

[0270] Due to these synergistic effects, the rust preventive oil composition of this embodiment has more excellent rust prevention properties than conventional rust preventive oil compositions.

[0271] Example

[0272] The present invention is further described in detail below with reference to examples, but the present invention is not limited to these examples.

[0273] Table 1 shows the cycloparaffin components, paraffin components, and aromatic components of the base oils (A)-1 to (A)-3, (a)-1, and (a)-2 used as raw materials for the rust preventive oil composition of the present embodiment.

[0274] The cycloparaffin content, paraffin content, and aromatic content of base oils (A)-1 to (A)-3, (a)-1, and (a)-2 were measured using the same methods as those described above for measuring the cycloparaffin content, paraffin content, and aromatic content.

[0275] Table 1

[0276]

[0277] <Preparation of Rust Preventive Oil Composition>

[0278] (Examples 1 to 43, Comparative Examples 1 to 5)

[0279] Using the components shown in Tables 2 to 7, rust preventive oil compositions of respective examples were prepared.

[0280] The kinematic viscosity at 40° C. of each base oil (A) and each rust preventive oil composition in Tables 2 to 7 is a value measured in accordance with JIS K2283-2000 “Crude oil and petroleum products—Kinematic viscosity test method and viscosity index calculation method”.

[0281] [Rust resistance test]

[0282] Preparation of test pieces

[0283] As test pieces, SPCC-SB materials specified in JIS G 3141 were used. Degreased test pieces were immersed in cutting oil (diluted 10-fold) for 60 seconds, hung for 30 seconds to remove excess cutting oil, and then immersed in the rust preventive oil composition of each example to be evaluated to prepare test pieces.

[0284] Evaluation of rust resistance

[0285] The rust preventive properties of each rust preventive oil composition were evaluated according to the wet test specified in JIS K2246. Evaluations were conducted at specified intervals (after 168 hours, 366 hours, 504 hours, 672 hours, 840 hours, and 1008 hours). Evaluations in this test were based on the rust degree specified in JIS K2246 (A to E; A indicates the highest rust preventive properties).

[0286] The results are shown in Tables 2 to 7 as "Rust Prevention Test".

[0287] [Removability test]

[0288] Each test piece, prepared by immersing it in the rust preventive oil composition of each example, was immersed in 1 L of a 40°C degreasing solvent (manufactured by Innolux, trade name "NS100") in a 2L beaker and stirred at 120 rpm for 30 seconds to remove the rust preventive oil composition from each test piece. The solvent was then evaporated by blowing hot air at 90°C for 60 seconds (30 seconds on each side) and then immediately allowed to stand horizontally in a constant humidity and temperature chamber at 95% humidity and 40°C for 48 hours. Rust formation was then evaluated according to the wet test specified in JIS K2246. Evaluation in this experiment was based on the rust degree specified in JIS K2246 (grades A to E; grade A indicates the best rust prevention), using the following criteria. Specifically, the more rust formed (grade E), the better the removability of the oil repellent composition.

[0289] The results are shown in Tables 2 to 7 as "removability test."

[0290] <Evaluation of Exclusion>

[0291] A (best removal performance): Rust level E (most rusty)

[0292] B: Rust level D

[0293] C: Rust level C

[0294] D: Rust level B

[0295] E (worst removability): Rustiness Grade A (least rusty) Table 2

[0296]

[0297] Table 3

[0298]

[0299] Table 4

[0300]

[0301] Table 5

[0302]

[0303] Table 6

[0304]

[0305] Table 7

[0306]

[0307] In Tables 2 to 7, the abbreviations have the following meanings: The numerical values are the blending amounts (mass %). (A)-1 to (A)-3, (a)-1, (a)-2: The mineral oil (a)-2 having the properties shown in Table 1 is n-dodecane.

[0308] (B1)-1: Hexadecanoic acid (palmitic acid) diethanolamide

[0309] (B1)-2: Oleic acid diethanolamide

[0310] (B1)-3: Decanoic acid diethanolamide

[0311] (B1)-4: Eicosanoic acid (arachidic acid) diethanolamide

[0312] (B1)-5: Hexanoic acid diethanolamide

[0313] (B1)-6: Butyric acid diethanolamide

[0314] (B1)-7: Tetracosanoic acid diethanolamide

[0315] (B1)-8: Hexadecanoic acid monoethanolamide

[0316] (B1)-9: Hexadecanoic acid monoisopropanolamide

[0317] (B1)-10: Hexadecanoic acid dipropanolamide

[0318] (B1)-11: Hexadecanoic acid dibutanolamide

[0319] (B2)-1: N-hexadecyltrimethylenediamine oleate

[0320] (B2)-2: N-octadecyltrimethylenediamine oleate

[0321] (B2)-3: N-decyltrimethylenediamine oleate

[0322] (B2)-4: N-octyl trimethylene diamine oleate

[0323] (B2)-5: N-Eicosyltrimethylenediamine oleate

[0324] (B2)-6: N-Butyltrimethylenediamine oleate

[0325] (B2)-7: N-hexadecyltrimethylenediamine oleate

[0326] (B2)-8: N-hexadecyltrimethylenediamine dodecanoate

[0327] (B2)-9: N-hexadecyltrimethylenediamine octanoate

[0328] (B2)-10: N-hexadecyltrimethylenediamine eicosanoate

[0329] (B2)-11: N-hexadecyltrimethylenediamine octanoate

[0330] (B2)-12: N-hexadecyltrimethylenediamine hexacosanate

[0331] (C)-1: Calcium salt of paraffin wax

[0332] (C)-2: Monooctylamine salt of polyolefin wax

[0333] (C)-3: Calcium salt of lanolin fatty acid

[0334] (C)-4: Sodium salt of ricinoleic acid

[0335] (C)-5: Sorbitan monooleate

[0336] (C)-6: Pentaerythritol lanolin fatty acid ester (full ester)

[0337] (C)-7: N-oleoylsarcosine

[0338] (C)-8: Dicyclohexylamine

[0339] (C)-9: Monooctylamine

[0340] (C)-10: Lanolin fatty acid

[0341] (C)-11: Dimer acid

[0342] (C)-12: Calcium dialkylbenzenesulfonate

[0343] (C)-13: Barium dialkylbenzenesulfonate

[0344] (C)-14: Ethylenediamine Sulfate

[0345] (C)-15: Calcium borate

[0346] As shown in Tables 2 to 7, it was confirmed that the rust preventive oil compositions of Examples had comparable removability to the rust preventive oil compositions of Comparative Examples and were superior in rust preventive properties.

[0347] While preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other modifications may be made without departing from the spirit of the present invention. The present invention is not limited to the above description but is limited only by the scope of the appended claims.

Claims

1. A rust preventive oil composition comprising a base oil (A), a fatty acid alkanolamide (B1), and a compound (B2) represented by the following general formula (B2-1), wherein: The cycloparaffin content of the base oil (A) is 40% by volume or more and 65% by volume or less, and the paraffin content of the base oil (A) is 35% by volume or more and 60% by volume or less, The content of the base oil (A) is 93% to 98% by mass relative to the total amount of the rust preventive oil composition. The kinematic viscosity of the rust preventive oil composition at 40° C. is 0.5 mm 2 / s~2mm 2 / s, <h2 style=";text-align:left;direction:ltr">R<h2 style=";text-align:left;direction:ltr"> 1 <h2 style=";text-align:left;direction:ltr"> -NH(CH2)3NH2·2R<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> -COOH (B2-1) Where R 1 and R 2 Each independently represents a saturated or unsaturated hydrocarbon group having 4 to 26 carbon atoms.

2. The rust preventive oil composition according to claim 1, further comprising a rust preventive agent (C), wherein the rust preventive agent (C) comprises one or more compounds selected from the group consisting of oxidized wax salts, carboxylic acids, carboxylates other than the compound (B2), sulfonates, fatty acid esters, sarcosine compounds, amines, and boron compounds.

3. The rust preventive oil composition according to claim 1 or 2, wherein The content of the fatty acid alkanolamide (B1) is 0.01% by mass or more and less than 5% by mass based on the total amount of the rust preventive oil composition.

4. The rust preventive oil composition according to claim 1 or 2, wherein The content of the compound (B2) is 0.01% by mass or more and 5% by mass or less based on the total amount of the rust preventive oil composition.

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