Tapping torque antirust agent and antirust oil and fat composition

Abstract

To provide a tapping torque antirust agent or an antirust oil and fat composition not only having antirust property but also imparting excellent tapping torque and moreover, to provide a tapping torque antirust agent or an antirust oil and fat composition that are environmentally friendly.SOLUTION: The invention relates to a tapping torque antirust agent that includes a rice oil. Also, the invention relates to an antirust oil and fat composition that includes the tapping torque antirust agent and moreover, an antirust agent.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a tapping torque rust inhibitor and a rust-preventive oil and fat composition. [Background technology]

[0002] Metal fastening members, including screws, bolts, nuts, nails, etc., are essential for manufacturing many structures, such as architectural structures and automobiles. When these metal fastening members are used outdoors, they rust due to moisture, salt, etc., when exposed to the open air, and are subject to corrosion and deterioration. Therefore, rust formation has a significant impact on the durability, corrosion resistance, etc., of structures that use these members. Therefore, various rust inhibitors have been developed to improve the corrosion resistance of metals. For example, chromate, hexavalent chromium, and other rust inhibitors are known as antiseptics.

[0003] However, due to recent environmental issues, there is an increasing demand for the development of more environmentally friendly products, and in particular, there is an increasing demand for the use of highly safe substances derived from natural products such as plants.

[0004] For example, Patent Document 1 describes a rust inhibitor containing tannins such as persimmon tannins. However, it is described that rust inhibitors containing tannins have problems with durability. In recent years, furthermore, from the perspective of SDGs and the like, there is an expectation for accelerating the development of products using such environmentally friendly plant-derived raw materials.

[0005] Among the screws that are metal fastening members used in the above-mentioned architectural structures, tapping screws, for example, are commonly used because they are efficient and easy to use, as they do not require thread cutting using a tap or internal threads such as nuts, and can be used after drilling a pilot hole. However, although such tapping screws can be fastened while cutting an internal thread into the mating member, they require torque (rotational force) when forming the internal thread, which can cause problems such as fatigue for the operator. Furthermore, because the work is done with an electric screwdriver tool, the drive part (recess) of the screw head is scratched, and the plating or other coating on the metal surface of the screw is peeled off, which inevitably leads to the problem of rust forming on the surface. Therefore, there is a strong demand for the development of a screw that has good tapping torque properties and excellent rust prevention performance. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-089868 Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide a tapping torque rust inhibitor or a rust-preventive oil / fat composition that not only has rust-preventing properties but also can impart excellent tapping torque properties. Another object of the present invention is to provide an environmentally friendly tapping torque rust inhibitor or rust-preventive oil / fat composition. [Means for solving the problem]

[0008] The present inventors have conducted extensive research to develop a tapping torque rust inhibitor or a rust-preventive oil and fat composition that not only has rust-preventing properties but also can impart excellent tapping torque properties, and as a result, have found that the above-mentioned object can be achieved by using rice bran oil or a combination of rice bran oil and a rust inhibitor. The present invention was completed based on this finding.

[0009] That is, the present invention is as follows. Section 1. A tapping torque rust inhibitor containing rice oil. Section 2. Item 1. A rust-preventive oil and fat composition comprising the tapping torque rust inhibitor according to Item 1 and a rust inhibitor. Section 3. Item 3. The rust-preventive oil and fat composition according to Item 2, wherein the rust inhibitor comprises a nitrogen-containing compound, a fatty acid ester compound, a phosphate ester compound, or persimmon tannin. Section 4. The rice oil contains oleic acid and linoleic acid, Item 3. The rust-preventive oil and fat composition according to Item 2, wherein the content of the linoleic acid is 20 to 100 parts by mass per 100 parts by mass of the oleic acid. Section 5. Item 4. The rust-preventive oil and fat composition according to Item 3, wherein the rust inhibitor is a nitrogen-containing compound. Section 6. Item 6. The rust-preventive oil and fat composition according to Item 5, wherein the nitrogen-containing compound is an azole compound. Section 7. Item 6. The rust-preventive oil and fat composition according to Item 5, wherein the content of the nitrogen-containing compound is 0.05 to 1 part by mass per 100 parts by mass of the rice bran oil. Section 8. Item 8. A lubricating oil composition comprising the tapping torque rust inhibitor according to Item 1 or the rust preventive oil composition according to any one of Items 2 to 7. Section 9. Item 8. A metal fastening member comprising a layer formed from the tapping torque rust preventive according to item 1 or the rust preventive oil-and-fat composition according to any one of items 2 to 7. Section 10. Item 8. A screw having a layer formed from the tapping torque rust preventive according to Item 1 or the rust preventive oil-and-fat composition according to any one of Items 2 to 7. Section 11. Item 8. A top coating agent for screws, comprising the tapping torque rust inhibitor according to Item 1 or the rust preventive oil and fat composition according to any one of Items 2 to 7. Section 12. Item 8. An anti-galvanic corrosion agent comprising the tapping torque rust preventive according to Item 1 or the rust preventive oil and fat composition according to any one of Items 2 to 7.

[0010] In the case of inventions of products defined by a preparation process, it is currently impossible or impractically difficult to specify all of the components contained therein or their structure, and therefore the invention is described using a product-by-process claim. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a tapping torque rust inhibitor or a rust-preventive oil and fat composition that not only has rust-preventing properties but also can impart excellent tapping torque properties. Furthermore, the present invention can provide an environmentally friendly tapping torque rust inhibitor or rust-preventive oil and fat composition. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a photograph of a screw after completion of a corrosion resistance (rust prevention) test using the rust preventive oil and fat composition of Example 2. [Figure 2] FIG. 2 is a photograph of a screw after completion of a corrosion resistance (rust prevention) test using the rust preventive oil and fat composition of Comparative Example 8. DETAILED DESCRIPTION OF THE INVENTION

[0013] The tapping torque rust inhibitor or rust-preventive oil-and-fat composition of the present invention and their preparation methods are described in detail below.Furthermore, a lubricating oil composition containing the tapping torque rust inhibitor or rust-preventive oil-and-fat composition, a metal fastener having a layer formed from the tapping torque rust inhibitor or rust-preventive oil-and-fat composition, a screw having a layer formed from the tapping torque rust inhibitor or rust-preventive oil-and-fat composition, a screw top coating agent containing the tapping torque rust inhibitor or rust-preventive oil-and-fat composition, and an anti-galvanic corrosion agent containing the tapping torque rust inhibitor or rust-preventive oil-and-fat composition are also described below.

[0014] Tapping torque rust inhibitor The tapping torque rust inhibitor of the present invention contains rice oil.

[0015] The rice bran oil used in the present invention refers to an oil obtained from rice bran. Among rice bran oils, rice germ oil, which contains a relatively large amount of γ-oryzanol, is called rice germ oil. Here, rice bran oil also includes rice germ oil. The rice bran oil is not particularly limited, and examples thereof include "Rice Salad Oil" manufactured by Tsuno Foods Co., Ltd. and "Rice Oil" manufactured by Tsuno Foods Co., Ltd.

[0016] Rice oil contains fatty acids that are liquid at room temperature, such as oleic acid, linoleic acid, α-linolenic acid, and palmitic acid.

[0017] Oleic acid is an unsaturated fatty acid, and is an ω-9 fatty acid with a carbon:double bond ratio of 18:1 (n-9), represented by the formula CH3(CH2)7CH=CH(CH2)7COOH. Oleic acid has a melting point of 13.4°C. Linoleic acid is an unsaturated fatty acid, and is an omega-6 fatty acid with a carbon number:double bond ratio of 18:2(n-6), represented by the formula CH3(CH2)4(CH=CHCH2)2(CH2)6COOH. Linoleic acid has a melting point of -5°C. Alpha-linolenic acid is an unsaturated fatty acid, and is an omega-3 fatty acid with a carbon number:double bond number ratio of 18:3 (n-3), represented by the formula CH3CH2(CH=CHCH2)3(CH2)6COOH. Alpha-linolenic acid has a melting point of -11°C. Palmitic acid is a saturated fatty acid and has the structure CH3(CH2) 14 Palmitic acid is a fatty acid with a carbon number:double bond number ratio of 16:0, represented by COOH. Its melting point is 62.9°C.

[0018] In addition to fatty acids, rice bran oil also contains vitamin E (tocopherol), tocotrienol, γ-oryzanol, etc. The fatty acids in rice bran oil typically contain about 44% (40-45%) oleic acid, about 36% (35-40%) linoleic acid, about 1.2% (1-2%) α-linolenic acid, and about 17% (15-20%) palmitic acid. Therefore, in the present invention, an oil and fat composition containing 40-45% oleic acid, 35-40% linoleic acid, 1-2% α-linolenic acid, and 15-20% palmitic acid may be used instead of rice bran oil.

[0019] The rice bran oil preferably contains γ-oryzanol. The γ-oryzanol content of rice bran oil is not particularly limited. For example, it is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, and particularly preferably 0.3% by mass, per 100 parts by mass of rice bran oil.

[0020] The rice bran oil used in the present invention is not limited to oil obtained from rice bran, but vegetable oils and the like can also be used that have a fatty acid ratio that matches that of rice bran oil. In addition, not only new oil (new oil) but also recycled rice oil (hereinafter referred to as recycled rice oil, etc.) can be used as rice oil. The rice oil preferably contains oleic acid and linoleic acid. The content of linoleic acid in rice bran oil is usually 20 to 100 parts by mass, preferably 50 to 90 parts by mass, and more preferably 80 to 85 parts by mass, per 100 parts by mass of oleic acid. The content of α-linolenic acid in rice bran oil is usually 1 to 5 parts by mass, preferably 1.5 to 4 parts by mass, and more preferably 2 to 3 parts by mass, per 100 parts by mass of oleic acid. The content of palmitic acid in rice bran oil is usually 10 to 60 parts by mass, preferably 20 to 50 parts by mass, and more preferably 30 to 40 parts by mass, per 100 parts by mass of oleic acid. Only one type of rice bran oil may be used, or two or more types may be used.

[0021] It is considered that the smaller the tapping torque value, the better. When the tapping torque rust preventative of the present invention is applied to a screw and measured with a torque analyzer (manufactured by Atonic Co., Ltd., product name: 20 N m Torque Analyzer), the maximum torque of a 4 mm diameter self-drilled screw is preferably less than 5.0 N m, more preferably less than 4.8 N m, and particularly preferably less than 4.7 N m.

[0022] The tapping torque rust inhibitor of the present invention can further contain other components. Here, the tapping torque rust inhibitor containing other components can be rephrased as a rust-preventive oil and fat composition.

[0023] Rust-preventive oil composition The rust-preventive oil and fat composition of the present invention contains the above-mentioned tapping torque rust inhibitor and further contains a rust inhibitor. The tapping torque rust inhibitor contains rice bran oil, and the rice bran oil may be the same as that described above.

[0024] Rust inhibitor The rust inhibitor is not particularly limited as long as it is a known rust inhibitor, and examples thereof include nitrogen-containing compounds, fatty acid ester compounds, phosphate ester compounds, persimmon tannins, etc. Among these, oil-soluble rust inhibitors that dissolve in rice bran oil are preferred. The HLB of the rust inhibitor is not particularly limited, but is preferably 5 to 17, more preferably 6 to 10.

[0025] nitrogen-containing compounds The nitrogen-containing compound is not particularly limited as long as it is a compound containing at least one nitrogen atom. Examples of the nitrogen-containing compound include imidazole compounds such as imidazole, 1-methylimidazole, 2-methylimidazole, 2-ethyl-4-ethylimidazole, 2-ethylimidazole, N-(3-aminopropyl)imidazole, 1,2-dimethylimidazole, and 2-(heptadecenyl)-4,5-dihydro-1H-imidazole-1-ethanol (VpCI (registered trademark, hereinafter omitted)-369, HLB: 6.3, manufactured by Cortec Corporation); pyrazole compounds such as 1,4-dimethylpyrazole; benzothiazole compounds such as mercaptobenzothiazole; and azole compounds such as benzotriazole; diamine compounds such as DTPA and EDTA (ethylenediaminetetraacetic acid), manufactured by Chelest Co., Ltd.; amine salts of oxidized paraffin (Chilesrite BS, Chelesrite Z-7); monoethanolamine, diethanolamine, triethanolamine, thiazolinone ... Alkanolamines with medium to high pKa, low to medium volatility, and hydrophilic properties, such as triethanolamine, mono-n-propanolamine, di(n-propanol)amine, tri(n-propanol)amine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, methylisopropanolamine, N-methylethanolamine, N-ethylethanolamine, N-butylethanolamine, N-methyldiethanolamine, N-methyldiisopropanolamine, N-butyldiethanolamine, N-octyldiethanolamine, N,N-dimethylethanolamine, N,N-dimethylisopropanolamine, N,N-diethylethanolamine, N,N-dibutylethanolamine, 2-(2-aminoethyl)ethanol, dimethylaminoethoxyethanol, 4-(2-hydroxyethyl)morpholine, and 3-dimethylamino-1-propanol;Medium to high pKa, medium to high pKa, such as dicyclohexylamine, 2-(diethylamino)ethylamine, 3-(diethylamino)propylamine, 2-ethylhexylamine, di-(2-ethylhexylamine), tris-(2-ethylhexyl)amine, N-methylmorpholine, morpholine, octamethylenediamine, n-octylamine, N,N,N',N'-tetramethyl-1,6-hexamethylenediamine, N,N,N',N'-tetramethyl-1,3-propanediamine, tridecylamine (mixture of isomers), ditridecylamine (mixture of isomers), benzylamine, pyrrolidine, 2,2'-dimorpholinodiethyl ether, 3-methoxypropylamine, polyetheramine D2000, and polyetheramine D230. Examples of suitable amine compounds include highly volatile, hydrophobic alkylamines; acetylene alcohols such as 3-butyn-2-ol, 1-ethynyl-1-cyclohexanol, 4-ethyl-1-octyn-3-ol, 2-methyl-3-butyn-2-ol, and propargyl alcohol; polyoxyethylene laurylamines such as Amite (registered trademark, hereinafter abbreviated) 102 (manufactured by Kao Corporation, HLB: 6.3), Amite 105 (HLB: 9.8), and Amite 105A; polyoxyethylene stearylamines such as Amite 302 (HLB: 5.1), Amite 308 (HLB: 12.1), and Amite 320 (HLB: 15.4); and alkylamine ethylene oxide adducts (also referred to as ethylene oxide-added fatty amines). Among these, preferred nitrogen-containing compounds are azole compounds, more preferably imidazole compounds, and particularly preferably imidazole compounds with a molecular weight of 300 or more. ;

[0026] The HLB of the nitrogen-containing compound is not particularly limited, but is preferably 5-17, and more preferably 6-10. The content of the nitrogen-containing compound is not particularly limited, and is, for example, usually 0.05 to 10 parts by mass, preferably 0.1 to 5 parts by mass, and more preferably 0.5 to 2 parts by mass, per 100 parts by mass of rice bran oil. As the nitrogen-containing compound, only one kind may be used, or two or more kinds may be used.

[0027] fatty acid ester compounds The fatty acid ester compound is a compound formed by the reaction of a fatty acid with an alcohol, and is not particularly limited as long as it is an organic compound having a fatty acid ester group, and examples thereof include fatty acid esters such as sorbitan fatty acid ester (manufactured by Riken Vitamin Co., Ltd., product name: Poem O-80V), glycerin fatty acid ester (manufactured by Riken Vitamin Co., Ltd., product name: Poem G-002), polyoxyethylene sorbitan fatty acid ester, and polyoxysorbitol fatty acid ester. Examples of sorbitan fatty acid esters include sorbitan fatty acid monoesters such as sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, and sorbitan monooleate; sorbitan fatty acid diesters such as sorbitan dilaurate, sorbitan dipalmitate, sorbitan distearate, and sorbitan dioleate; and sorbitan fatty acid triesters such as sorbitan trilaurate, sorbitan tripalmitate, sorbitan tristearate, and sorbitan trioleate. The HLB of the fatty acid ester compound is not particularly limited, but is preferably 5-17, and more preferably 6-10. Examples of glycerin fatty acid esters include glycerin fatty acid monoesters such as monoglycerides and acetylated monoglycerides, glycerin fatty acid diesters such as organic acid monoglycerides, glycerin fatty acid mono- and di-esters such as mono- and diglycerides, and glycerin fatty acid triesters such as medium-chain fatty acid triglycerides.

[0028] Specific examples of glycerin fatty acid monoesters include glycerin monocaprylate, glycerin monocaprate, glycerin monolaurate, glycerin monomyristate, glycerin monopalmitate, glycerin monostearate, glycerin mono-12-hydroxystearate, glycerin monoarachidiate, glycerin monobehenate, and glycerin monooleate.

[0029] Specific examples of glycerin fatty acid diesters include glycerin dicaprylate, glycerin dicaprate, glycerin dilaurate, glycerin dimyristate, glycerin dipalmitate, glycerin distearate, and glycerin dioleate.

[0030] Specific examples of glycerin fatty acid mono-diesters include glycerin mono-distearate, glycerin mono-dibehenate, and glycerin mono-diolate.

[0031] Specific examples of glycerin fatty acid triesters include glycerin tricaprylate, glycerin tricaprate, and glycerin trilaurate.

[0032] Examples of polyglycerol fatty acid esters include diglycerol fatty acid esters, tetraglycerol fatty acid esters, pentaglycerol fatty acid esters, hexaglycerol fatty acid esters, and decaglycerol fatty acid esters.

[0033] Specific examples of diglycerol fatty acid esters include diglycerol fatty acid monoesters such as diglycerol monocaprylate, diglycerol monocaprate, diglycerol monolaurate, diglycerol monomyristate, diglycerol monopalmitate, diglycerol monostearate, and diglycerol monooleate; and diglycerol fatty acid diesters such as diglycerol dilaurate, diglycerol dimyristate, diglycerol dipalmitate, diglycerol distearate, and diglycerol dioleate.

[0034] Specific examples of tetraglycerol fatty acid esters include tetraglycerol fatty acid monoesters such as tetraglycerol monolaurate, tetraglycerol monomyristate, tetraglycerol monopalmitate, tetraglycerol monostearate, and tetraglycerol monooleate; tetraglycerol fatty acid triesters such as tetraglycerol trilaurate, tetraglycerol trimyristate, tetraglycerol tripalmitate, tetraglycerol tristearate, and tetraglycerol trioleate; and tetraglycerol fatty acid pentaesters such as tetraglycerol pentalaurate, tetraglycerol pentamyrylstate, tetraglycerol pentapalmitate, tetraglycerol pentastearate, and tetraglycerol pentaoleate.

[0035] Specific examples of pentaglycerin fatty acid esters include pentaglycerin fatty acid monoesters such as pentaglycerin monolaurate, pentaglycerin monomyristate, pentaglycerin monopalmitate, pentaglycerin monostearate, and pentaglycerin monooleate; pentaglycerin fatty acid diesters such as pentaglycerin distearate; pentaglycerin fatty acid triesters such as pentaglycerin tristearate; and pentaglycerin fatty acid hexaesters such as pentaglycerin hexastearate.

[0036] Specific examples of hexaglycerol fatty acid esters include hexaglycerol fatty acid monoesters such as hexaglycerol monolaurate, hexaglycerol monomyristate, hexaglycerol monopalmitate, hexaglycerol monostearate, and hexaglycerol monooleate; hexaglycerol fatty acid triesters such as hexaglycerol tristearate; and hexaglycerol fatty acid pentaesters such as hexaglycerol pentastearate and hexaglycerol pentaoleate.

[0037] Specific examples of decaglycerol fatty acid esters include decaglycerol fatty acid monoesters such as decaglycerol monolaurate, decaglycerol monomyristate, decaglycerol monopalmitate, decaglycerol monostearate, and decaglycerol monooleate; decaglycerol fatty acid diesters such as decaglycerol distearate; decaglycerol fatty acid triesters such as decaglycerol tristearate; decaglycerol pentaesters such as decaglycerol pentastearate and decaglycerol pentaoleate; and decaglycerol decaesters such as decaglycerol decasterate and decaglycerol decaoleate.

[0038] Among them, the fatty acid ester compound is preferably a fatty acid ester having one or two hydroxyl groups, more preferably a sorbitan fatty acid ester, and particularly preferably a sorbitan fatty acid ester or a glycerin fatty acid ester. The fatty acid ester compound referred to here may have the effect of a nonionic surfactant.

[0039] The content of the fatty acid ester compound is not particularly limited, and is, for example, usually 0.05 to 10 parts by mass, preferably 0.1 to 5 parts by mass, and more preferably 0.5 to 2 parts by mass, relative to 100 parts by mass of rice bran oil. As the fatty acid ester compound, only one type may be used, or two or more types may be used.

[0040] phosphate ester compounds The phosphate ester compound is not particularly limited as long as it is a compound having a phosphate ester group, and examples thereof include phosphate ester compounds such as acidic phosphate ester of castor oil (Killesrite P-21A, manufactured by Chelest Co., Ltd.), acidic phosphate ester calcium salt of castor oil (Killesrite P-21C, manufactured by Chelest Co., Ltd.), and phosphate ester (Killesrite P-18C, manufactured by Chelest Co., Ltd.). Of these, phosphate ester compounds are preferred.

[0041] The content of the phosphate ester compound is not particularly limited, and is, for example, usually 0.05 to 10 parts by mass, preferably 0.1 to 5 parts by mass, and more preferably 0.5 to 2 parts by mass, relative to 100 parts by mass of rice bran oil. As the phosphate ester compound, only one type may be used, or two or more types may be used.

[0042] persimmon tannin The persimmon tannin is not particularly limited, and commercially available persimmon tannins can be used, such as tannin ("Kakishibu" manufactured by Osugi Katagami Kogyo Co., Ltd.), tannic acid ("Tannic Acid AL" manufactured by Fuji Chemical Industry Co., Ltd.), and persimmon tannin extract (natural plant extract manufactured by Release Science Industry Co., Ltd.). The content of persimmon tannin is not particularly limited, and is, for example, usually 0.05 to 10 parts by mass, preferably 0.1 to 5 parts by mass, and more preferably 0.5 to 2 parts by mass, per 100 parts by mass of rice bran oil. As persimmon tannin, only one type may be used, or two or more types may be used.

[0043] Other oil-soluble rust inhibitors include, for example, a petroleum sulfonic acid-based dehumidifying penetrating rust inhibitor (Cebo EP-10, manufactured by Toyo Pharmaceutical Chemical Industry Co., Ltd.), sulfonic acid-based rust inhibitors such as alkylnaphthalenesulfonates, and alkenylsuccinic anhydrides.

[0044] Fats and oils other than rice bran oil In addition to rice bran oil and the rust inhibitor, the rust-preventive oil composition of the present invention can further contain oils and fats other than rice bran oil, such as vegetable oils and fats other than rice bran oil, and mineral oils.

[0045] The vegetable oils other than rice bran oil are not particularly limited, and examples thereof include palm oil, canola oil, cottonseed oil, camellia oil, soybean oil, and olive oil. As the vegetable oil other than rice bran oil, only one type may be used, or two or more types may be used.

[0046] Examples of mineral oils include aromatic hydrocarbons, paraffinic hydrocarbons, naphthenic hydrocarbons, etc. More specific examples include spindle oil, liquid paraffin, etc. Commercially available products can be used as these mineral oils. As the mineral oil, only one type may be used, or two or more types may be used.

[0047] Optional ingredients The rust-preventive oil and fat composition (main component) of the present invention may further contain surfactants, pigments, silane coupling agents, rust inhibitors other than nitrogen-containing compounds, lubricants, other additives, and the like.

[0048] The surfactant is not particularly limited, and examples thereof include cationic surfactants, anionic surfactants, nonionic surfactants, amphoteric surfactants, etc. Note that the surfactants referred to here are included in the definition of rust inhibitors if they overlap with the compounds described above as rust inhibitors.

[0049] The cationic surfactant is not particularly limited, and examples thereof include alkyl (having 8 to 24 carbon atoms) trimethylammonium salts, dialkyl (having 8 to 24 carbon atoms) dimethylammonium salts, alkyl (having 8 to 24 carbon atoms) pyridinium salts, and alkyl (having 8 to 24 carbon atoms) dimethylbenzylammonium salts. Examples of amidoamine surfactants include stearic acid diethylaminoethylamide, stearic acid dimethylaminoethylamide, palmitic acid diethylaminoethylamide, palmitic acid dimethylaminoethylamide, myristic acid diethylaminoethylamide, myristic acid dimethylaminoethylamide, behenic acid diethylaminoethylamide, behenic acid dimethylaminoethylamide, isostearic acid diethylaminoethylamide, isostearic acid dimethylaminoethylamide, stearic acid diethylaminopropylamide, stearic acid dimethylaminopropylamide, palmitic acid diethylaminopropylamide, palmitic acid dimethylaminopropylamide, myristic acid diethylaminopropylamide, myristic acid dimethylaminopropylamide, behenic acid diethylaminopropylamide, behenic acid dimethylaminopropylamide, isostearic acid diethylaminopropylamide, and isostearic acid dimethylaminopropylamide.

[0050] The anionic surfactant is not particularly limited, and examples thereof include alkyl (8 to 24 carbon atoms) sulfates, alkyl (8 to 24 carbon atoms) ether sulfates, alkyl (8 to 24 carbon atoms) benzenesulfonates, dialkyl (8 to 24 carbon atoms) sulfosuccinates, polyoxyalkylene alkyl (8 to 24 carbon atoms) ether sulfosuccinates, alkyl (8 to 24 carbon atoms) phosphates, polyoxyalkylene alkyl (8 to 24 carbon atoms) ether phosphates, acylated (8 to 24 carbon atoms) tau Examples of such salts include phosphate salts, acylated methyl taurines (having 8 to 24 carbon atoms), acylated alanines (having 8 to 24 carbon atoms), acylated N-methyl-β-alanines (having 8 to 24 carbon atoms), acylated glutamates (having 8 to 24 carbon atoms), acylated isethionates (having 8 to 24 carbon atoms), acylated sarcosinates (having 8 to 24 carbon atoms), α-sulfofatty acid ester salts, ether carboxylates, long-chain carboxylates (having 8 to 24 carbon atoms), and polyoxyalkylene fatty acid monoethanolamide sulfates. Among these, preferred anionic surfactants include alkyl (C8-24) sulfates, alkyl (C8-24) ether sulfates, alkyl (C8-24) sulfosuccinates, polyoxyalkylene alkyl (C8-24) ether sulfosuccinates, alkyl (C8-24) phosphates, polyoxyalkylene alkyl (C8-24) ether phosphates, acylated (C8-24) taurines, acylated (C8-24) methyl taurines, acylated (C8-24) sarcosinates, polyoxyalkylene fatty acid monoethanolamide sulfates, alkyl polyoxyalkylene sulfate ester salts, and sodium salts of animal and vegetable oil sulfates.

[0051] The nonionic surfactant is not particularly limited, and examples thereof include silicone surfactants; polyoxyethylene alkyl phenyl ethers; polyoxyethylene fatty acid esters; formalin condensates of polyoxyethylene alkyl phenyl ethers; polyoxyalkylene alkyl ethers such as polyoxyethylene alkyl ethers and polyoxypropylene alkyl ethers; sorbitan higher fatty acid ester surfactants; polyoxyethylene aryl ethers; polyoxyethylene (mono-, di-, or tri-)phenyl phenyl ethers; polyoxyethylene (mono-, di-, or tri-)benzyl phenyl ethers; polyoxypropylene (mono-, di-, or tri-)benzyl phenyl ethers; polyoxyethylene (mono-, di-, or tri-)styryl phenyl ethers; polyoxypropylene (mono-, di-, or tri-)styryl phenyl ethers; alkylphenyl ether polymers; polyoxyethylene polyoxypropylene block polymers; alkyl polyoxyethylene polyoxypropylene block polymer ethers; alkylphenyl polyoxyethylene polyoxypropylene block polymer ethers; polyoxyethylene bisphenyl ether; polyoxyethylene resin acid esters; glycerol fatty acid ester ethylene oxide adducts; castor oil ethylene oxide adducts; hydrogenated castor oil ethylene oxide adducts; alkylamine ethylene oxide adducts and fatty acid amide ethylene oxide adducts; polyoxyethylene fatty acid amides; alkylphenoxypolyethoxyethanol and polyoxyethylene rosin esters; acetylene surfactants such as acetylene glycol or its ethylene oxide adducts, and acetylene alcohol or its ethylene oxide adducts.

[0052] Examples of the silicone surfactant include KF-640 (polyoxyethylene methylpolysiloxane; manufactured by Shin-Etsu Chemical Co., Ltd.), DyneAmic (manufactured by STERE CHEMICAL), KINETIC (polyalkylene-modified polymethylsiloxane nonionic surfactant; manufactured by STERE CHEMICAL), Silwet L-77 (silicon polyalkylene oxide-modified methylpolysiloxane; manufactured by Witco), and SLIPPA (mixture of silicon polyalkylene oxide-modified methylpolysiloxane and linear alcohol surfactant; manufactured by INTERAGRO). These silicone surfactants are distinguished from silicones used as antifoaming agents, which are added in small amounts to rust-preventive oil and fat compositions.

[0053] Examples of the polyoxyethylene alkyl phenyl ether include trade name Althorp 30 (containing 30% polyoxyethylene nonylphenyl ether; manufactured by Sumitomo Chemical Co., Ltd.), trade name Agral 30 (manufactured by ICI), trade name Agral 90 (manufactured by ICI), trade name Agral PLUS (manufactured by ICI), trade name ARKOPAL N-100 (manufactured by Hoechst), trade name CITOWETT (manufactured by BASF), trade name Genapol X-60, trade name Kusarino (registered trademark) (manufactured by Nihon Nohyaku Co., Ltd.), trade name Noigen (registered trademark, hereinafter omitted) EA110 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), trade name Mixpower (registered trademark) (40% polyoxyethylene alkyl phenyl ether and 40% polyoxyethylene alkyl ether; manufactured by Tomono Agrica Co., Ltd.), and the like.

[0054] Examples of the polyoxyalkylene alkyl ether include trade name Noigen TDS-70 (polyoxyethylene alkyl ether, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) and trade name Newcalgen (registered trademark) R-100 (polyoxyalkylene alkyl ether, manufactured by Takemoto Yushi Co., Ltd.).

[0055] Examples of the polyoxyethylene fatty acid esters include those available under the trade name Lamigen (registered trademark) ES-70 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), those available under the trade name EMULAN (registered trademark) PS700 (manufactured by BASF), those available under the trade name Panguard KS-20 (manufactured by Mitsui Toatsu Agricultural Chemicals Co., Ltd.), those available under the trade name Spray Sticker (manufactured by Nihon Nohyaku Co., Ltd.), those available under the trade name D-3605 (manufactured by Takemoto Yushi Co., Ltd.), those available under the trade name D-230 (manufactured by Takemoto Yushi Co., Ltd.), those available under the trade name D-233 N (manufactured by Takemoto Yushi Co., Ltd.), and those available under the trade name Noigen ET-120E (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.).

[0056] Examples of the sorbitan higher fatty acid ester surfactants include Approach (registered trademark) BI (containing 50% polyoxyethylene hexitane fatty acid ester; manufactured by Kao Corporation) and TWEEN (registered trademark) 20 (fatty acid polyoxyethylene sorbitan ester; manufactured by Wako Pure Chemical Industries, Ltd.).

[0057] Furthermore, in the present invention, a mixture of a nonionic surfactant and an anionic surfactant, such as Gramin S (product name: containing 15% polyoxyethylene nonylphenyl ether, 5% polyoxyethylene fatty acid ester, and 4% sodium polynaphthylmethanesulfonate; manufactured by Sankyo Agro Co., Ltd.), can also be used.

[0058] The amphoteric surfactant is not particularly limited, and examples thereof include betaine-type surfactants, amino acid-type surfactants, etc. Examples of betaine-type surfactants include alkyl (C8-24) amidopropyl betaine, alkyl (C8-24) carboxybetaine, alkyl (C8-24) sulfobetaine, alkyl (C8-24) hydroxysulfobetaine, alkyl (C8-24) amidopropylhydroxysulfobetaine, alkyl (C8-24) hydroxyphosphobetaine, alkyl (C8-24) aminocarboxylate, alkyl (C8-24) sodium amphoacetate, alkyl (C8-24) amine oxide, alkyl (C8-24) phosphate ester containing tertiary nitrogen and quaternary nitrogen, etc.

[0059] When the rust-preventive oil-and-fat composition of the present invention contains a surfactant, the content of the surfactant in the rust-preventive oil-and-fat composition of the present invention is usually 0.05 to 30 mass%, preferably 0.5 to 28 mass%, and more preferably 1 to 25 mass%, relative to 100 mass% of the entire composition. The surfactant may be used alone or in combination of two or more.

[0060] As the pigment, only one of extender pigments, color pigments and anti-rust pigments may be used, or two or more of them may be used.

[0061] The extender pigment is not particularly limited, and examples thereof include talc, clay, calcium carbonate, magnesium carbonate, barium sulfate, silicic acid, silicates, aluminum oxide hydrate, calcium sulfate, gypsum, micaceous iron oxide (MIO), glass flake, szolite mica, and clarite mica.

[0062] The color pigment is not particularly limited, and examples thereof include titanium oxide, carbon black, white lead, graphite, zinc sulfide, zinc oxide (zinc white), chromium oxide, yellow nickel titanium, yellow chromium titanium, yellow iron oxide, red iron oxide, black iron oxide, phthalocyanine blue, phthalocyanine green, ultramarine blue, quinacridones, and azo-based red and yellow pigments.

[0063] The anti-rust pigment is not particularly limited, and examples thereof include zinc molybdate, aluminum molybdate, zinc powder (Zn), zinc phosphate, and aluminum powder (Al).

[0064] A silane coupling agent is a compound that has both an organic functional group that exhibits reactivity and / or affinity to organic polymers (such as cured resins) and an organic functional group that exhibits reactivity and / or affinity to inorganic materials (such as pigments contained in anticorrosive oil and fat compositions).

[0065] In the present invention, one or more silane coupling agents can be used as the silane coupling agent. The silane coupling agent is preferably used in an amount of 0.5 to 5% by mass relative to the total mass of the base agent.

[0066] The lubricant may be, for example, grease, which is composed of a base oil selected from mineral oil, synthetic oil, or a mixture of the two, a urea-based thickener, extreme-pressure additives such as molybdenum disulfide, tungsten disulfide, melamine cyanurate, graphite, boron nitride, etc., and further additives such as molybdenum dithiocarbamate, zinc dithiocarbamate, zinc dithiophosphonate, sulfur-based additives, phosphorus-based additives, oiliness agents, dispersants, and antioxidants.

[0067] The other additives are not particularly limited, and examples thereof include co-usable resins, anti-sagging and anti-settling agents, anti-color separation agents, anti-foaming and anti-popping agents, leveling agents, matting agents, solvents, and the like.

[0068] The resin to be used in combination is not particularly limited, and for example, petroleum-based resins (xylene resins, etc.), acrylic resins, polyester resins, etc. can be used.

[0069] The anti-sagging / anti-settling agent is not particularly limited, and those commonly used in the relevant field can be used. For example, the product name "Disparlon (registered trademark) 6700" (aliphatic bisamide thixotropic agent, manufactured by Kusumoto Chemicals Co., Ltd.) can be preferably used.

[0070] The solvent is not particularly limited, and examples thereof include weak solvents. A weak solvent is an aliphatic hydrocarbon solvent that has a high flash point, a high boiling point, and low toxicity, such as mineral spirits, turpentine, etc. More specific weak solvents include mineral spirits, white spirits, mineral turpentine, isoparaffin, solvent kerosene, aromatic naphtha, VM&P naphtha, solvent naphtha, etc.

[0071] Commercially available weak solvents include trade names such as "Solvesso (registered trademark) 100," "Solvesso (registered trademark) 150," and "Solvesso (registered trademark) 200" (all manufactured by ExxonMobil Corporation), and trade names such as "Swasol (registered trademark) 310," "Swasol (registered trademark) 1000," and "Swasol (registered trademark) 1500" (all manufactured by Cosmo Oil Co., Ltd.). Other examples of single-component solvents include aliphatic hydrocarbons such as n-butane, n-hexane, n-heptane, n-octane, isononane, n-decane, n-dodecane, cyclopentane, cyclohexane, and cyclobutane.

[0072] When a solvent is contained, the content of the solvent is usually 5 to 50% by mass relative to the total mass of the main agent.

[0073] When the rust-preventive oil-and-fat composition of the present invention is applied to a screw and the maximum torque of a 4 mm diameter self-drilling screw is measured with a torque analyzer (manufactured by Atonic Corporation, product name: 20 N m Torque Analyzer), the maximum torque is preferably less than 5.0 N m, more preferably less than 4.8 N m, and particularly preferably less than 4.7 N m.

[0074] Method for preparing rust-preventive oil and fat composition The method for preparing (producing) the rust-preventive oil and fat composition of the present invention is not particularly limited, and no special method is required, and methods commonly used by those skilled in the art can be used. For example, the method for preparing the rust-preventive oil and fat composition of the present invention includes a step of mixing a tapping torque rust inhibitor (rice bran oil) with a rust inhibitor (a nitrogen-containing compound, a fatty acid ester compound, a phosphate ester compound, or persimmon tannin). Note that a rust-preventive oil and fat composition containing only a tapping torque rust inhibitor and a rust inhibitor may also be referred to as a main component. Furthermore, when the rust-preventive oil and fat composition contains optional components (additives, etc.) other than the main component, the preparation method thereof is not particularly limited, and examples thereof include a preparation method in which the tapping torque rust inhibitor, the rust inhibitor, and, if necessary, other components such as the additives described above are mixed and dispersed using a dispersing machine such as a disperser, a ball mill, an SG mill, or a roll mill.

[0075] Purpose The tapping torque rust inhibitor or rust-preventive oil / fat composition of the present invention is a tapping torque rust inhibitor or rust-preventive oil / fat composition used on the surface of a metal. The tapping torque rust inhibitor or rust-preventive oil and fat composition of the present invention can be used, for example, as a lubricating oil composition, an anti-electrolytic corrosion agent, a top coating agent for screws, etc. Furthermore, a metal fastener having a layer formed from the tapping torque rust inhibitor or rust-preventive oil-and-grease composition of the present invention, particularly a screw having a layer formed from the tapping torque rust inhibitor or rust-preventive oil-and-grease composition of the present invention, not only has rust-preventive performance but also excellent tapping torque performance. The tapping torque rust inhibitor or rust-preventive oil-and-grease composition of the present invention, and a metal fastener having a layer formed from the tapping torque rust inhibitor or rust-preventive oil-and-grease composition of the present invention, are environmentally friendly products. In addition, each invention of the product can be blended with known additives (optional components) for these uses.

[0076] Coating method (painting method) The coating method (painting method) of the tapping torque rust inhibitor or rust-preventive oil and fat composition of the present invention can be carried out by a general method such as dipping, brushing, roller application, or spraying. The tapping torque rust inhibitor or rust-preventive oil / fat composition of the present invention can typically be reused by filtering even the surplus portion generated by centrifugal drying.

[0077] Object to be coated The substrate (the object to be coated (painted) with the tapping torque rust inhibitor or the rust-preventive oil / fat composition of the present invention) is not particularly limited as long as it is a steel material (metal) that requires rust prevention, and examples thereof include connecting members such as bolts, nuts, screws, nails, and rivets, as well as various materials such as building materials; electrical parts; and structural members for automobiles, railways, and ships.

[0078] The surface of the substrate may be previously blasted, or may be coated with an anti-rust paint, a shop paint, or an organic or inorganic zinc primer.

[0079] Metal fasteners The type of metal fastening member is not limited in terms of material, shape, size, purpose, etc., as long as it is a metal (including alloys and intermetallic compounds).

[0080] Examples of materials include metals such as iron, copper, titanium, aluminum, nickel, and magnesium, as well as alloys such as steel, stainless steel, brass, titanium-based alloys, aluminum-based alloys, nickel-based alloys, and magnesium-based alloys.

[0081] The product may also be one that has undergone a surface treatment (surface treatment using a metal coating) such as plating, chemical conversion treatment, thermal spraying, painting, anodizing of aluminum alloys, etching, CVD, or PVD. In particular, rust-proof plated products are also suitable for use in the present invention. Typical examples of such rust-proof plated products include zinc-plated products and alloy-plated products such as iron-, nickel-, tin-, and chromium-based products. Furthermore, zinc-plated products may be chromate-treated products such as bright chromate (unichrome), colored chromate, black chromate, green chromate, and trivalent chromate, or multi-layered products with two or more layers, such as a zinc-plated base coat followed by a top coat such as an aluminum alloy powder coating.

[0082] In addition, the surface may be treated without containing hexavalent chromium, for example, by treating zinc plating with a hexavalent chromium-free film or by painting.

[0083] A typical treatment for chromium-based stainless steel screws is passivation treatment.

[0084] Passivation is a rust prevention treatment. For example, by treating a screw with a nitric acid-based oxidizing agent (passivation treatment), an oxide layer (passivation film) with improved rust prevention properties is formed.

[0085] Screw There are no particular limitations on the type of screw as long as it has a spiral groove. Here, "screw" is a general term for all screws with a spiral groove. Bolts and screws are also types of screws, and in the present invention, bolts and screws are also included in the term "screw." The screw may be fastened by either tightening the screw alone or by clamping it between a screw and a nut. Examples of screws used in the method of clamping between a screw and a nut include bolts. Examples of screws used in the method of fastening a single screw include drill screws, tapping screws, machine screws, and tapered screws. Self-drilling screws are screws that are mainly used in steel-framed buildings, sheet metal processed products, etc. These self-drilling screws have a drill attached to the tip that can drill holes in metal plates, so a single self-drilling screw can be used to drill holes, create screw holes, and tighten screws. Tapping screws can be tapped independently if a pilot hole is drilled using a tapping drill or similar. Therefore, even if the part you want to use the screw in does not have a female thread, which is a cylindrical hole with a groove cut into the inner surface to accept a male thread, you can use the screw alone. There are many types of tapping screws, including those with a pointed tip and those with a groove cut into the shank, which can be used to cut into the mating part while tightening. The screw may also be one whose head has been scratched with an electric drill, etc. The tapping torque rust inhibitor or rust-preventive oil / fat composition of the present invention has excellent tapping torque properties and rust prevention properties even on scratched screws. [Example]

[0086] The present invention will be explained in more detail below with reference to examples, but the technical scope of the present invention is not limited to these examples.

[0087] (1) Examination test of tapping torque rust inhibitor Example 1 20 g of rice oil (manufactured by Tsuno Foods Co., Ltd., product name: rice salad oil) was prepared and used as tapping torque rust inhibitor 1 (oil 1). The rice oil used contained 42% oleic acid, 36% linoleic acid, and 16% palmitic acid. Separately, stainless steel screws (manufactured by Kokubu Co., Ltd., SUS410 drill screws) were prepared by passivating (Sakamoto Kogyo Co., Ltd.). The above-mentioned tapping torque rust inhibitor 1 was placed in a beaker (45 mm x 78 mm) and oil heated to 35°C was obtained. The above-mentioned 10 screws were placed in the oil and immersed for 10 minutes. After that, the screws were placed in a basket. To adjust the film thickness, the removed screw was heated and centrifuged and dried using a centrifugal drying tank (manufactured by Kida Seiko Co., Ltd., product name: manual wax device), to obtain screw 1 having a layer (average film thickness 33 μm) formed from tapping torque rust inhibitor 1. The average film thickness is not particularly limited, but is usually in the range of 1 μm to 100 μm, preferably in the range of 10 μm to 75 μm, and more preferably in the range of 25 μm to 50 μm.

[0088] <Comparative Example 1> Comparative screw 1 having a layer (average film thickness 30 μm) formed from comparative oil 1 was obtained in the same manner as in Example 1, except that rice bran oil was replaced with coconut oil (comparative oil 1).

[0089] <Comparative Example 2> Comparative screw 2 having a layer (average film thickness 33 μm) formed from comparative oil 2 was obtained in the same manner as in Example 1, except that rice bran oil was replaced with canola oil (comparative oil 2).

[0090] <Comparative Example 3> Comparative screw 3 having a layer (average film thickness 36 μm) formed from comparative oil 3 was obtained in the same manner as in Example 1, except that rice bran oil was replaced with cottonseed oil (comparative oil 3).

[0091] <Comparative Example 4> Comparative screw 4 having a layer (average film thickness 32 μm) formed from comparative oil 4 was obtained in the same manner as in Example 1, except that rice bran oil was replaced with camellia oil (comparative oil 4).

[0092] <Comparative Example 5> Comparative screw 5 having a layer (average film thickness 30 μm) formed from comparative oil 5 was obtained in the same manner as in Example 1, except that rice bran oil was replaced with soybean oil (comparative oil 5).

[0093] <Comparative Example 6> Comparative screw 6 having a layer (average film thickness 33 μm) formed from comparative oil 6 was obtained in the same manner as in Example 1, except that rice bran oil was replaced with olive oil (comparative oil 6).

[0094] Test example 1 (corrosion resistance test) The corrosion resistance test was conducted using the accelerated exposure corrosion life prediction test (FCK test method) developed by the Kansai Screw Cooperative Association and described in Patent No. 4471897, which is used to predict the service life of fastener hardware such as screws used to fasten roofs, exterior walls, etc. of building structures.

[0095] Specifically, a combined cycle testing machine SYP-90 (Suga Testing Machine) was used to test the metal components through the following steps (a) and (b): (a) spraying an aqueous solution (pH=4) containing 0.5 wt % NaCl and 0.1 wt % CaCl onto the component in air at 30 to 60°C for 16 hours; (b) leaving the component in air at 30 to 60°C for 8 hours; This is a method of repeatedly performing a combination of the above. In the following Test Example 1, the above steps (a) and (b) constitute one cycle, and this cycle is repeated for 10 or 15 cycles. Here, the test performed for 10 cycles is designated as FCK Test Method A, and the test performed for 15 cycles is designated as FCK Test Method B.

[0096] The FCK test method is said to produce results that are highly correlated with outdoor exposure tests. For example, a screw that develops red rust after 15 cycles of accelerated testing using this FCK test method can be estimated to develop red rust after 66 months in Osaka and 12 months in Omaezaki.

[0097] <Evaluation of the condition of red rust on the head of each screw> Ten screws each of the screws obtained in Example 1 and Comparative Examples 1 to 6 were prepared. Ten of each type of prepared screw was subjected to a corrosion resistance test using FCK test method A (10 cycles) described in Test Example 1, and the state of red rust on the head of each screw was evaluated on the following three-point scale. 0: No red rust 1: Red rust occurs on less than 50% of the surface area 2: Red rust occurs on 50% or more of the surface

[0098] <Corrosion resistance test evaluation> The scores for the red rust condition of the screw heads of the 10 screws obtained in the corrosion resistance test were totaled to determine a total value, which was then evaluated on a 5-point scale according to the following evaluation criteria. Less than 5:5 4:5 or more and less than 6 3:6 or more and less than 11 2:11 or more and less than 16 1:16 or more

[0099] Test example 2 (tapping torque test; maximum torque) Using the self-drilling screws obtained in Example 1 and Comparative Examples 1 to 6, pilot holes were drilled into a 2.3 mm thick C-shaped steel plate (without pilot holes), and then taps were inserted to form threads, and the tapping torque value until penetration was measured. Specifically, the mating member (C-shaped steel plate) was fixed, and the maximum torque (N·m) during tapping was measured using a torque analyzer (manufactured by Atonic Co., Ltd., product name: 20 N·m Torque Analyzer). Tapping torque performance was evaluated on a five-point scale based on the maximum torque value, as shown below.

[0100] <Evaluation of tapping torque test> 5: Less than 4.7 N m 4: 4.7N·m or more but less than 4.8N·m 3: 4.8N·m or more and less than 5.0N·m 2: 5.0 N·m or more and less than 5.1 N·m 1:5.1N m or more

[0101] The screws obtained in Example 1 and Comparative Examples 1 to 6 were subjected to the FCK test method A (10 cycles) and Test Example 2 (tapping torque test) of the corrosion resistance test of Test Example 1. The total score of the evaluations of Test Example 1 (corrosion resistance test) and Test Example 2 (tapping torque test) was calculated, and an overall evaluation was made according to the following criteria. <Overall rating> 〇:6 or more ×: Less than 6

[0102] The results are shown in Table 1 below.

[0103] [Table 1]

[0104] <Result> Tapping torque rust inhibitors containing rice bran oil received higher ratings in both corrosion resistance tests and tapping torque tests than other vegetable oils (palm oil, canola oil, cottonseed oil, camellia oil, soybean oil, and olive oil), and received an excellent overall rating.

[0105] (2) Rust-preventive oil composition mixed with tapping torque rust inhibitor and rust inhibitor: Study on the type of tapping torque rust inhibitor (oil) <Example 2> 20 g of rice bran oil (manufactured by Tsuno Foods Co., Ltd., product name: rice salad oil) and 10 g of a nitrogen-containing compound (manufactured by Cortec Co., Ltd., product name: VpCI-369) were mixed at room temperature to prepare rust-preventive oil and fat composition 2. The rice bran oil used contained 42% oleic acid, 36% linoleic acid, and 16% palmitic acid. Stainless steel screws (manufactured by Kokubu Co., Ltd., SUS410 drill screws) were obtained by passivating the screws (Sakamoto Kogyo Co., Ltd.). The rust-preventive oil and fat composition 2 was placed in a beaker (45 mm x 78 mm) and heated to 35°C to obtain an oil and fat composition. The 10 screws described above were placed in the beaker and immersed for 10 minutes. The screws were then placed in a basket. To adjust the film thickness, the removed screw was heated and centrifuged and dried using a centrifugal drying tank (manufactured by Kida Seiko Co., Ltd., product name: manual wax device), to obtain a screw 2 having a layer (average film thickness 33 μm) formed from the rust-preventive oil composition 2. The average film thickness is not particularly limited, but is usually in the range of 1 μm to 100 μm, preferably in the range of 10 μm to 75 μm, and more preferably in the range of 25 μm to 50 μm.

[0106] <Comparative Example 7> Comparative oil-and-fat composition 7 was prepared in the same manner as in Example 2, except that rice bran oil was replaced with coconut oil. Then, in the same manner as in Example 2, comparative screw 7 having a layer (average film thickness 30 μm) formed from comparative oil-and-fat composition 7 was obtained.

[0107] <Comparative Example 8> Comparative oil-and-fat composition 8 was prepared in the same manner as in Example 2, except that rice bran oil was replaced with canola oil. Then, in the same manner as in Example 2, comparative screw 8 having a layer (average film thickness 33 μm) formed from comparative oil-and-fat composition 8 was obtained.

[0108] <Comparative Example 9> Comparative oil-and-fat composition 9 was prepared in the same manner as in Example 2, except that rice bran oil was replaced with cottonseed oil. Then, in the same manner as in Example 2, comparative screw 9 having a layer (average film thickness 36 μm) formed from comparative oil-and-fat composition 9 was obtained.

[0109] <Comparative Example 10> Comparative oil-and-fat composition 10 was prepared in the same manner as in Example 2, except that rice bran oil was replaced with camellia oil. Then, in the same manner as in Example 2, a comparative screw 10 having a layer (average film thickness 32 μm) formed from comparative oil-and-fat composition 10 was obtained.

[0110] <Comparative Example 11> Comparative oil-and-fat composition 11 was prepared in the same manner as in Example 2, except that rice bran oil was replaced with soybean oil. Then, in the same manner as in Example 2, comparative screw 11 having a layer (average film thickness 30 μm) formed from comparative oil-and-fat composition 11 was obtained.

[0111] <Comparative Example 12> Comparative oil-and-fat composition 12 was prepared in the same manner as in Example 2, except that rice bran oil was replaced with olive oil. Then, in the same manner as in Example 2, comparative screw 12 having a layer (average film thickness 33 μm) formed from comparative oil-and-fat composition 12 was obtained.

[0112] The screws obtained in Example 2 and Comparative Examples 7 to 12 were subjected to FCK test method A (10 cycles) and Test Example 2 (tapping torque test) from the corrosion resistance test of Test Example 1. The total score of the evaluations in Test Example 1 (corrosion resistance test) and Test Example 2 (tapping torque test) was calculated, and an overall evaluation was made according to the following criteria. <Overall rating> ◎: 10 or more 〇: More than 8 and less than 10 △: More than 6 and less than 8 ×:6 or less

[0113] The results are shown in Table 2 below. 1 shows a photograph of the screw obtained in Example 2 after the corrosion resistance test. FIG. 2 shows a photograph of the screw obtained in Comparative Example 8 after the corrosion resistance test.

[0114] [Table 2]

[0115] <Result> The rust-preventive oil composition of Example 2, which contained a tapping torque rust inhibitor containing rice bran oil and a rust inhibitor, had superior overall evaluations in the corrosion resistance test and tapping torque property test compared to the comparative oil compositions of Comparative Examples 7 to 12, which contained a vegetable oil other than rice bran oil and a rust inhibitor.

[0116] (3) Rust-preventive oil composition containing a mixture of tapping torque rust inhibitor and rust inhibitor: Study of the type of rust inhibitor Example 3 A screw 3 having a layer formed from a tapping torque rust inhibitor containing rice bran oil and a rust-preventive oil composition 2 containing a nitrogen-containing compound was obtained in the same manner as in Example 2, except that the material of the sample was changed to Hard Tech (stainless steel screw manufactured by Kokubu Co., Ltd.).

[0117] Example 4 Rust-preventive oil and fat composition 4 was prepared in the same manner as in Example 2, except that the nitrogen-containing compound was replaced with 0.1 g of fatty acid ester compound 1 (manufactured by Riken Vitamin Co., Ltd., product name: Poem O-80V (sorbitan fatty acid ester), HLB approximately 4.9). Then, a screw 4 having a layer formed from rust-preventive oil and fat composition 4 was obtained in the same manner as in Example 3.

[0118] <Example 5> A rust-preventive oil and fat composition 5 was prepared in the same manner as in Example 2, except that the nitrogen-containing compound was replaced with 0.1 g of fatty acid ester compound 2 (manufactured by Riken Vitamin Co., Ltd., product name: Poem G-002 (glycerin fatty acid ester)). Then, a screw 5 having a layer formed from the rust-preventive oil and fat composition 5 was obtained in the same manner as in Example 3.

[0119] Example 6 An anti-rust oil and fat composition 6 was prepared in the same manner as in Example 2, except that the nitrogen-containing compound was replaced with 1.0 g of a phosphate ester compound (manufactured by Chelest Co., Ltd., product name: Cheleslite P-18C). Then, a screw 6 having a layer formed from the anti-rust oil and fat composition 6 was obtained in the same manner as in Example 3.

[0120] Example 7 A rust-preventive oil-and-fat composition 7 was prepared in the same manner as in Example 2, except that the nitrogen-containing compound was replaced with persimmon tannin. Then, a screw 7 having a layer formed from the rust-preventive oil-and-fat composition 7 was obtained in the same manner as in Example 3.

[0121] The screws obtained in Examples 3 to 7 were subjected to the FCK test method B (15 cycles) and Test Example 2 (tapping torque test) of the corrosion resistance test in Test Example 1. The total score of the evaluations in Test Example 1 (corrosion resistance test) and Test Example 2 (tapping torque test) was calculated. The results are shown in Table 3 below.

[0122] [Table 3]

[0123] <Result> The tapping torque rust inhibitor containing rice bran oil and the rust-preventive oil and fat compositions containing the rust inhibitor of Examples 3 to 7 all received high evaluations in the corrosion resistance test and the tapping torque test. Among them, the tapping torque rust inhibitor containing rice bran oil and the rust-preventive oil and fat composition of Example 3 containing a nitrogen-containing compound as a rust inhibitor received the highest total evaluation points in the corrosion resistance test and the tapping torque test.

[0124] (4) Testing of damaged screws Example 8 A screw 8 having a layer formed from a tapping torque rust inhibitor containing rice bran oil and a rust-preventive oil composition 2 containing a nitrogen-containing compound was obtained for Hard Tech (SUS410 series stainless steel screw, manufactured by Kokubu Co., Ltd.) in the same manner as in Example 2. Then, assuming misalignment of the screws due to vibration or external force that may occur during transportation, about 30% of the screws were placed in a small screw box (80 × 130 × 110) and shaken 180 times for about 3 minutes to apply vibration, and a damaged screw 8 was obtained.

[0125] Example 9 Rust-preventive oil and fat composition 4 was prepared in the same manner as in Example 2, except that the nitrogen-containing compound was replaced with 0.1 g of fatty acid ester compound 1 (manufactured by Riken Vitamin Co., Ltd., product name: Poem O-80V (sorbitan fatty acid ester), HLB 4.3). Then, a scratched screw 9 having a layer formed from the rust-preventive oil and fat composition 4 was obtained in the same manner as in Example 8.

[0126] Example 10 A rust-preventive oil and fat composition 5 was prepared in the same manner as in Example 2, except that the nitrogen-containing compound was replaced with 0.1 g of a fatty acid ester compound 2 (manufactured by Riken Vitamin Co., Ltd., product name: Poem G-002 (glycerin fatty acid ester), HLB 7.0). Then, a scratched screw 10 having a layer formed from the rust-preventive oil and fat composition 5 was obtained in the same manner as in Example 8.

[0127] Example 11 An anti-rust oil and fat composition 6 was prepared in the same manner as in Example 2, except that the nitrogen-containing compound was replaced with 1.0 g of a phosphate ester compound (manufactured by Chelest Co., Ltd., product name: Cheleslite P-18C). Then, a scratched screw 11 having a layer formed from the anti-rust oil and fat composition 6 was obtained in the same manner as in Example 8.

[0128] Example 12 Except for replacing the nitrogen-containing compound with persimmon tannin, a rust-preventive oil-and-fat composition 7 was prepared in the same manner as in Example 2. Then, a flawed screw 12 having a layer formed from the rust-preventive oil-and-fat composition 7 was obtained in the same manner as in Example 8.

[0129] The damaged screws obtained in Examples 8 to 12 were subjected to the FCK test method B (15 cycles) and Test Example 2 (tapping torque test) of the corrosion resistance test of Test Example 1. The total score of the evaluations of Test Example 1 (corrosion resistance test) and Test Example 2 (tapping torque test) was calculated. The results are shown in Table 4 below.

[0130] [Table 4]

[0131] <Result> The tapping torque rust inhibitor containing rice bran oil and the rust-preventive oil and fat compositions containing the rust inhibitor of Examples 8 to 12 all received high marks in the corrosion resistance test and tapping torque test on damaged screws. Among them, the tapping torque rust inhibitor containing rice bran oil of Example 8 and the rust-preventive oil and fat composition containing a nitrogen-containing compound received the highest total score in the corrosion resistance test and tapping torque test on damaged screws, and no deterioration of the screws was observed even after the corrosion resistance test.

Claims

1. A tapping torque rust inhibitor containing rice oil.

2. A rust-preventive oil composition comprising the tapping torque rust inhibitor according to claim 1 and a rust inhibitor.

3. The rust-preventive oil and fat composition according to claim 2 , wherein the rust inhibitor comprises a nitrogen-containing compound, a fatty acid ester compound, a phosphate ester compound, or persimmon tannin.

4. The rice oil contains oleic acid and linoleic acid, 3. The rust-preventive oil and fat composition according to claim 2, wherein the content of the linoleic acid is 20 to 100 parts by mass per 100 parts by mass of the oleic acid.

5. The rust-preventive oil composition according to claim 3, wherein the rust inhibitor is a nitrogen-containing compound.

6. The rust-preventive oil composition according to claim 5 , wherein the nitrogen-containing compound is an azole-based compound.

7. The rust-preventive oil and fat composition according to claim 5, wherein the content of the nitrogen-containing compound is 0.05 to 1 part by mass per 100 parts by mass of the rice bran oil.

8. A lubricating oil composition comprising the tapping torque rust inhibitor according to claim 1 or the rust preventive oil composition according to any one of claims 2 to 7.

9. A metal fastening member comprising a layer formed from the tapping torque rust preventive according to claim 1 or the rust preventive oil / fat composition according to any one of claims 2 to 7.

10. A screw provided with a layer formed from the tapping torque rust preventive according to claim 1 or the rust preventive oil-and-fat composition according to any one of claims 2 to 7.

11. A top coating agent for screws, comprising the tapping torque rust inhibitor according to claim 1 or the rust preventive oil / grease composition according to any one of claims 2 to 7.

12. An anti-galvanic corrosion agent comprising the tapping torque rust inhibitor according to claim 1 or the rust-preventive oil / fat composition according to any one of claims 2 to 7.

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