JPH0329277B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a lubricating oil composition, and more particularly, the present invention relates to a lubricating oil composition that has improved lubricity and does not deteriorate the appearance of friction surfaces or machined surfaces, and is particularly suitable for use with metals such as rolling, drawing, punching, cutting, etc. The present invention relates to a lubricating oil composition that can be effectively used for processing. [Prior art and problems to be solved by the invention] Lubricating oils contain various oil-based agents and extreme pressure agents, which contribute to improving lubricity such as seizure resistance and wear resistance. There is. However, these conventionally known compounds that have a large effect on improving lubricity, such as high aliphatic acids, sulfur compounds, and phosphoric acid esters, generate dirt on friction surfaces and machined surfaces, mainly consisting of wear particles and rust. , there is a problem in that it deteriorates its appearance. Particularly when these compounds are used as metalworking oils, the processed product is sold as a product, so deterioration in appearance significantly reduces the value of the product, and a solution to this problem is desired. [Means for Solving the Problems] The present inventor has conducted extensive research in order to solve the above-mentioned conventional problems. As a result, a composition containing mineral oil and/or a synthetic compound containing a dicarboxylic acid having a specific structural formula or its hydrogenated product and a salt produced by the reaction with a specific alkyl amine has been found to improve the appearance of worn and machined surfaces. It was discovered that the lubricity was improved without deteriorating the surface condition (surface condition), and based on this knowledge, the present invention was completed. That is, the present invention provides (A) mineral oil and/or synthetic oil and (B) general formula [In the formula, X represents 0 or 1. 〕 or The present invention provides a lubricating oil composition comprising a salt produced by reacting an aliphatic dicarboxylic acid represented by the formula or its hydrogenated product with a secondary or tertiary alkylamine having a total of 20 to 60 carbon atoms. In the present invention, mineral oil and/or synthetic oil is used as component (A). Here, the mineral oil and/or synthetic oil is the base of the lubricating oil composition of the present invention, and is not particularly limited, but has a viscosity of 5 to 5 at 40°C.
100 cst is good. Specifically, mineral oils include naphthenic mineral oils, intermediate mineral oils, lubricating oil fractions of paraffinic mineral oils, and highly aromatic components obtained by decomposition of these mineral oils.
Examples of synthetic oils include long-chain alkylbenzenes, branched alkylbenzenes, polyolefin oils such as polybutene, alkylnaphthalenes, ester oils, and polyglycol oils. Among these, paraffin mineral oil is preferred. The above-mentioned oils can be used alone or in combination of two or more. In addition, in the present invention, as component (B), an aliphatic dicarboxylic acid represented by the above general formula [] or [] or a hydrogenated product thereof, and a secondary or tertiary alkyl having a total number of carbon atoms of 20 to 60. A salt produced by reaction with an amine is used. Here, the aliphatic dicarboxylic acid represented by the above general formula [] or [] is specifically, for example, Examples of such expressions include: As the alkylamine to be reacted with the aliphatic dicarboxylic acid represented by the above general formula [] or [], those having a total carbon number of 20 to 60 are used.
Further, the alkylamine may be either secondary or tertiary, but tertiary amine is particularly preferred. Specific examples of such alkylamines include dimethylstearylamine, dimethyloleylamine, dilaurylmonomethylamine, trioctylamine, distearylamine, dioleylamine, and the like. In the reaction between the aliphatic dicarboxylic acid and the alkylamine, the former: the latter = 1:0.2-10 (molar ratio).
It is preferably used in a ratio of 1:0.5 to 5 (molar ratio), and at a temperature of room temperature to 100°C, preferably 40 to 80°C.
It is carried out at a temperature of 5 to 150 minutes, preferably 20 to 100 minutes. However, since the two react relatively easily in this way, when producing the composition, the two may be added separately and mixed to cause the two to react. Such reaction products may be used alone,
You may use two or more types in combination. In the present invention, the thus obtained reaction product of an aliphatic dicarboxylic acid and an alkylamine is used as component (B). This reaction product is blended in an amount of 0.01% by weight or more, preferably 0.5 to 30% by weight.
Here, if the blending amount of this reaction product is less than 0.01% by weight, the object of the present invention cannot be achieved. The present invention basically consists of both components (A) and (B) above, but if necessary, oily agents, extreme pressure agents, antioxidants, thickeners, sequestering agents, and pour point Physical properties can be improved by appropriately adding depressants, rust preventives, antifoaming agents, etc. The lubricating oil composition of the present invention is usually a water-free type, but if necessary, it can be made into an emulsion type by adding an emulsifier, and can be used depending on the purpose. be. [Effects of the Invention] According to the present invention as described above, the surface condition (surface finish) of the friction surface or machined surface is deteriorated due to dirt generated by adhesion of wear particles mainly rust or other substances to the friction surface or machined surface. There is no risk of it happening. Moreover, the lubricating oil composition of the present invention has excellent lubricating properties such as seizure resistance, wear resistance, and friction coefficient. As described above, the lubricating oil composition of the present invention has excellent lubrication performance and has significantly improved surface finish on friction surfaces and machined surfaces, and can be used extremely effectively as a lubricating oil in general, and as a metalworking oil in particular. can. [Example] Next, the present invention will be explained with reference to an example. Manufacturing example 1 formula 6-ethyl-hexadecane-1,16 represented by
-Dicarboxylic acid and dilaurylmethylamine were mixed at a ratio of 1:0.5 (molar ratio), and the reaction was carried out with stirring at 60°C for 50 minutes to obtain a reaction product. Production Example 2 The reaction product was produced in the same manner as in Production Example 1, except that tri-n-octylamine was used instead of dilaurylmethylamine in Production Example 1, and the molar ratio of the raw materials was set to 1:1. I got it. Production Example 3 1,18-octadecamethylenedicarboxylic acid represented by the formula HOOC(CH ₂ ) ₁₈ COOH and tri-2-octylamine were mixed in a ratio of 1:2.
(molar ratio) and reacted at 60°C for 50 minutes with stirring to obtain a reaction product. Production Example 4 A reaction product was obtained in the same manner as in Production Example 1 except that dioleylamine was used instead of dilaurylmethylamine and the molar ratio of the raw materials was 1:5. Manufacturing example 5 formula 6-vinyl△ ^9hexadecene -1,
16-dicarboxylic acid and dimethyloleylamine were mixed at a ratio of 1:3 (molar ratio), and the reaction was carried out at 60°C for 50 minutes with stirring to obtain a reaction product. Example 1 Paraffin mineral oil (15cst (40℃)) 98% by weight,
A lubricating oil composition was obtained by blending 1% by weight of oleic acid and 1% by weight of the reaction product obtained in Production Example 2. A rolling test and a storage stability test were conducted on this lubricating oil composition by the following methods. The results are shown in Table 1. [Rolling test] Reversible precision two-high rolling machine (manufactured by Yoshida Daini Kinen, roll size 200φ x 200L, roll material SUJ-2, hardness
Two passes of rolling were performed under the following rolling conditions using Hs97, roll roughness 0.4 μRmax), and the strength of the roll coating, which indicates the presence or absence of heat clutches and the amount of deposits on the rolling rolls, was evaluated. Rolling conditions Rolled material: SUS430 (1.0 mm x 50 mm x 100 m) Rolling speed: 100 m/min Reduction rate: 30% (1 pass) - 30% (2 passes) [Storage stability test] Lubricating oil composition in a 500 ml glass bottle collect things,
The sample was left for one day and observed for the presence or absence of a precipitate. The results are shown in Table 1. Example 2 A lubricating oil composition was prepared in the same manner as in Example 1, except that 1% by weight of the reaction product obtained in Production Example 4 was used instead of the reaction product obtained in Production Example 2. A rolling test and a storage stability test were conducted. The results are shown in Table 1. Example 3 A lubricating oil composition was obtained by blending 90% by weight of paraffinic mineral oil (15cst (40°C)) and 10% by weight of the reaction product obtained in Production Example 1, and this lubricating oil composition was prepared in accordance with Example 1. Rolling tests and storage stability tests were conducted in the same manner. The results are shown in Table 1. Comparative Example 1 A lubricating oil composition was obtained by blending 95% by weight of paraffinic mineral oil (15 cst (40°C)) and 5% by weight of the reaction product obtained in Production Example 3. Rolling tests and storage stability tests were conducted in the same manner. The results are shown in Table 1. Example 4 A lubricating oil composition was obtained by blending 98% by weight of paraffinic mineral oil (15cst (40°C)) and 2% by weight of the reaction product obtained in Production Example 4, and this lubricating oil composition was prepared in accordance with Example 1. Rolling tests and storage stability tests were conducted in the same manner. The results are shown in Table 1. Comparative Example 2 A rolling test and a storage stability test were conducted in the same manner as in Example 1 using the same paraffinic mineral oil (15cst (40°C)) used in Example 1. Results first
Shown in the table. Comparative Example 3 A lubricating oil composition was obtained by blending 99% by weight of paraffin mineral oil (15 cst (40°C)) and 1% by weight of oleic acid, and this lubricating oil composition was subjected to a rolling test and stored in the same manner as in Example 1. A stability test was conducted. The results are shown in Table 1. Comparative Example 4 99% by weight of the same paraffinic mineral oil (15cst (40°C)) used in Example 1 and the formula 6-ethyl-hexadecane-1,16 represented by
- A lubricating oil composition was obtained by blending 1.0% by weight of dicarboxylic acid. A rolling test and a storage stability test were conducted on this lubricating oil composition in the same manner as in Example 1. The results are shown in Table 1. Comparative Example 5 A lubricating oil composition was obtained by blending 99% by weight of the same paraffinic mineral oil (15cst (40°C)) used in Example 1 and 1% by weight of dilaurylamine, and this lubricating oil composition was prepared in Example 1. Rolling tests and storage stability tests were conducted in the same manner as above. The results are shown in Table 1.

[Grinding test]

Grinding was performed using a surface grinder (SG300, manufactured by Hanamura Giken Co., Ltd.) under the following grinding conditions, and the power consumption of the grindstone rotation motor and the dirt on the grindstone were evaluated. Grinding conditions Workpiece: S45C (HRc55) Grinding wheel: WA46J6V1 (150×13) Grinding speed: 1500m/min Depth of cut: 10μm Number of grinding: 100 times Table feed: 10m/min Lubrication amount: 10/min Example 6 Implementation In Example 5, a lubricating oil composition was obtained in the same manner as in Example 5, except that 1% by weight of the reaction product obtained in Production Example 5 was used instead of the reaction product obtained in Production Example 2, and a grinding test was conducted. , a storage stability test was conducted. The results are shown in Table 2. Comparative Example 6 A lubricating oil composition was obtained by blending 95% by weight of the same paraffinic mineral oil (20cst (40°C)) used in Example 5 and 5% by weight of chlorinated paraffin (Cl content ≒ 40% by weight). Grinding tests and storage stability tests were conducted on the lubricating oil composition. The results are shown in Table 2. Comparative Example 7 The same paraffinic mineral oil (20cst (40°C)) used in Example 5, 94% by weight, chlorinated paraffin (Cl
Content ≒ 40% by weight) 5% by weight and Formula 6-ethyl-hexadecane-1,16 represented by
- A lubricating oil composition was obtained by blending 1% by weight of dicarboxylic acid. Grinding tests and storage stability tests were conducted on this lubricating oil composition in the same manner as in Example 6.
The results are shown in Table 2.

[Deep drawing test]

Deep drawing was performed under the following conditions and the drawing performance was evaluated. In addition, the dirt on the die is 50 at an aperture ratio of 1.975.
Evaluation was made by visually observing the dice after being squeezed. ○ indicates no stain, △ indicates slight stain, and × indicates large stain. Deep drawing conditions Work material: JIS A1200-0, thickness 1.0mm Punch diameter: 32mm Clearance: 1.5mm Wrinkle holding force: 200Kgf Processing speed: 2.0m/min Comparative example 8 Same naphthenic mineral oil as used in Example 7 ( 56cst (40°C)) and 1% by weight of the reaction product obtained in Production Example 3 to obtain a lubricating oil composition,
A deep drawing test and a storage stability test were conducted on this lubricating oil composition in the same manner as in Example 7. The results are shown in Table 3. Example 8 A lubricating oil composition was obtained by blending 99% by weight of the same naphthenic mineral oil (56cst (40°C)) used in Example 7 and 1% by weight of the reaction product obtained in Production Example 5,
A deep drawing test and a storage stability test were conducted on this lubricating oil composition in the same manner as in Example 7. The results are shown in Table 3. Comparative Example 9 A lubricating oil composition was obtained by blending 99% by weight of the same naphthenic mineral oil (56cst (40°C)) used in Example 7 and 1% by weight of oleic acid. Deep drawing tests and storage stability tests were conducted in the same manner. The results are shown in Table 3. Comparative Example 10 Same naphthenic mineral oil (56cst (40℃)) as used in Example 8, 99% by weight and formula 6-ethyl-hexadecane-1,16 represented by
- A lubricating oil composition was obtained by blending 1.0% by weight of dicarboxylic acid. A deep drawing test and a storage stability test were conducted on this lubricating oil composition in the same manner as in Example 7. The results are shown in Table 3.

【table】

Claims (1)

[Claims] 1 (A) Mineral oil and/or synthetic oil and (B) General formula [In the formula, X represents 0 or 1. 〕 or A lubricating oil composition comprising a salt produced by the reaction of an aliphatic dicarboxylic acid represented by the formula or its hydrogenated product with a secondary or tertiary alkylamine having a total of 20 to 60 carbon atoms. 2. The lubricating oil composition according to claim 1, which contains (B) a salt produced by the reaction of an aliphatic dicarboxylic acid and an alkylamine in a proportion of 0.01% by weight or more. 3 (B) The salt produced by the reaction of an aliphatic dicarboxylic acid and an alkylamine is the former: the latter = 1:
The lubricating oil composition according to claim 1 or 2, which is reacted at a ratio of 0.2 to 10 (molar ratio).