JP4751077B2 - Lubricating oil composition - Google Patents

Description

  The present invention relates to a lubricating oil composition suitable for metal processing, and more particularly to a lubricating oil composition suitable for processing aluminum-based materials.

Aluminum-based materials are used in various fields for the purpose of weight reduction, and the materials are processed and manufactured into various aluminum products by plastic processing such as rolling, drawing, ironing, drawing, pressing, etc., cutting, grinding, etc. Has been. Lubricating oil is used for the processing, but in recent years, the lubricating oil has high performance such as high lubricity, low odor, safety, stability and removability due to thermal degreasing of the lubricating oil after lubrication. Is required.
For example, as described in Non-Patent Document 1, alcohol has been known as an oil-based agent for a long time as an additive for improving the above-described characteristics required for lubricating oil.
The alcohol has a hydroxyl group adsorbed on the aluminum surface, and a longer chain length of the alkyl group bonded to the hydroxyl group is generally superior in lubricity and reduces the coefficient of friction and metal adhesion (transfer). In the case of rolling, it is easy to obtain the effect of reducing the rolling load and improving the rolling reduction that can be rolled. However, if the chain length of the alkyl group is too long, it is likely to precipitate when formulated as a lubricating oil, resulting in poor stability and poor removability of the lubricating oil, resulting in so-called oil stains called oil stains. . Therefore, in view of lubricity, stability, removability, etc., monohydric alcohol having 12 to 18 carbon atoms is usually used as an oil-based agent for lubricating oil for processing aluminum-based materials.

On the other hand, when the lubrication state becomes severe in the processing of the aluminum-based material, it is difficult to obtain sufficient lubricity only with a monohydric alcohol having 12 to 18 carbon atoms. Therefore, for example, Patent Documents 1 to 7 propose using other oily agents and extreme pressure agents in combination in place of the monohydric alcohol.
However, when other oily agents or extreme pressure agents are blended, the required performance other than lubricity, especially the above-mentioned removability, low odor, safety and stability of the lubricating oil are sacrificed, and excellent lubricity and these It was difficult to achieve both required performance.
Patent Documents 3, 5, and 6 describe that a mixture of monohydric alcohols having 1 to 24 carbon atoms or 5 to 30 carbon atoms can be blended with the lubricating oil composition. However, as a preferable mixture described in these documents, only a mixture of a specific monohydric alcohol having 12 or more carbon atoms is described, and a specific long-chain alcohol and a short-chain alcohol are blended. Furthermore, nothing is taught about the effect of blending these at a specific ratio.
Material Testing Technology Vol. 29, no. 2, p117-p123 (1984) Japanese Patent Laid-Open No. 5-98284 JP-A-5-214356 JP-A-6-271889 JP 2001-107071 A JP 2003-96482 A JP 2003-165993 A JP 2004-224814 A

  The object of the present invention is to provide a lubricating oil suitable for metal working, which is excellent in all of lubrication in metal working, removal of lubricating oil after lubrication, low odor, safety and stability of lubricating oil. An object of the present invention is to provide a lubricating oil composition suitable for metal processing such as rolling of an aluminum-based material composition.

  As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention require a lubricating oil composition containing a specific long-chain alcohol and a short-chain alcohol in a specific ratio in the base oil to process an aluminum-based material. The present invention has been completed by finding that it has excellent lubricity and removability after lubrication, low odor, safety and stability.

That is, according to the present invention, at least one base oil selected from the group consisting of mineral oil, oil and fat, and synthetic oil, (A) a monohydric alcohol having 9 or more carbon atoms, and (B) a monovalent having 8 or less carbon atoms. The content ratio of the (A) monohydric alcohol having 9 or more carbon atoms is 0.5 to 15% by mass based on the total amount of the composition and the (B) monohydric alcohol having 8 or less carbon atoms. A lubricating oil composition for processing a non-aqueous aluminum material is provided, wherein the ratio is 0.05 to 10% by mass based on the total amount of the composition.
This onset Ming, for processing of aluminum-based material, especially preferably further is for rolling.

Since the lubricating oil composition of the present invention is blended with a specific base oil in a specific proportion of a C9 or higher monohydric alcohol and a C8 or lower monohydric alcohol, it has excellent lubricity in metal working, and a lubricating oil after lubrication. It is excellent in all of removability, low odor, safety and lubricating oil stability.
Therefore, it is particularly effective for metal working, particularly for cold rolling of aluminum-based materials. It is also useful for various processing of aluminum-based materials, for example, rolling other than cold rolling, plastic processing such as drawing, ironing, drawing, pressing, etc., cutting other than plastic processing, grinding processing, etc. It can also be used for processing various metals such as steel, stainless steel, special steel, copper, and copper alloys, and alloys of these metals.
Here, as the aluminum-based material, not only pure aluminum and high-purity aluminum of 99.9% or more, but also various aluminum alloys such as aluminum, magnesium, manganese, iron, tin, copper, chromium, nickel, zinc And an alloy with one or more metals selected from titanium, silicon, and the like. The lubricating oil composition of the present invention is particularly pure aluminum, high-purity aluminum of 99.9% or more, and an aluminum-manganese alloy. It can be applied to the processing of aluminum-magnesium alloys.

Hereinafter, the present invention will be described in detail.
The lubricating oil composition of the present invention contains at least one selected from the group consisting of mineral oils, fats and oils as base oils. That is, as the base oil, mineral oil, fats and oils, and synthetic oils may be used alone, or two or more of these may be used in combination.

Examples of the mineral oil include, for example, solvent degreasing, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, with respect to a lubricating oil fraction obtained by subjecting crude oil to atmospheric distillation and vacuum distillation. Examples thereof include paraffinic mineral oil, naphthenic mineral oil, and mixtures thereof obtained by appropriately combining one or two or more purification means such as sulfuric acid washing and clay treatment.
When mineral oil is used as the base oil, the aromatic content is not particularly limited, but from the viewpoint of the working environment, the aromatic content is usually 10% by volume or less, preferably 8% by volume or less, more preferably 6% by volume or less. It is desirable that As used herein, the term “aromatic content” means a value that is measured by applying the fluorescent indicator adsorption method of JIS K 2536 “Petroleum products—hydrocarbon type test method”.
The naphthene content of the mineral oil is not particularly limited, but is usually 20% by volume or more, preferably 25% by volume or more, more preferably 30% by volume or more because it can increase the seizure resistance limit at the time of rolling at a high processing rate of aluminum. Is desirable. In addition, the naphthene content is usually 90% by volume or less, preferably 85% by volume or less, more preferably 80% by volume or less because the friction coefficient at the time of low processing rate of aluminum can be lowered.
The paraffin content of the mineral oil is not particularly limited, but it is usually 5% by volume or more, preferably 10% by volume or more, and more preferably 15% by volume or more because the friction coefficient at the time of low processing rate of aluminum can be lowered. . Moreover, it is usually 80% by volume or less, preferably 75% by volume or less, more preferably 70% by volume or less because the seizure resistance limit at the time of rolling at a high workability of aluminum can be increased.

The naphthene content and the paraffin content are determined based on the molecular ion intensity obtained by mass spectrometry based on FI ionization using a glass reservoir. The measurement method is specifically shown below.
1) An adsorption tube for elution chromatography having a diameter of 18 mm and a length of 980 mm is filled with 120 g of silica gel having a nominal diameter of 74 to 149 μm (grade 923 manufactured by Fuji Devison Chemical Co., Ltd.) activated by drying at about 175 ° C. for 3 hours.
2) Inject 75 ml of n-pentane and pre-wet the silica gel.
3) About 2 g of the sample is precisely weighed, diluted with an equal volume of n-pentane, and the obtained sample solution is injected.
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 component, and the eluate is recovered from the lower end of the adsorption tube.
5) Apply the eluate of 4) above on a rotary evaporator to distill off the solvent to obtain a saturated hydrocarbon component.
6) Type analysis the saturated hydrocarbon component obtained in 5) above with a mass spectrometer. As an ionization method in mass spectrometry, FI ionization method using a glass reservoir is used, and JMS-AX505H manufactured by JEOL Ltd. is used as a mass spectrometer.
The measurement conditions at this time are as follows.
Acceleration voltage: 3.0 kV, cathode voltage: −5 to −6 kV, resolution: about 500, emitter: carbon emitter, current: 5 mA, measurement range: mass number 35 to 700, auxiliary oven temperature: 300 ° C., separator temperature: 300 ° C, main oven temperature: 350 ° C, sample injection volume: 1 μl.
7) The molecular ion obtained by the mass spectrometry of 6) above is subjected to isotope correction, and from its mass number, paraffins (C _n H _{2n + 2} ) and naphthenes (C _n H _2n , C _n H _{2n − 2} , C _n H _2n-4 ...)), And the fraction of each ionic strength is obtained to determine the content of each type for the entire saturated hydrocarbon component. Next, based on the content of the saturated hydrocarbon component obtained in 5) above, the contents of paraffin and naphthene for the entire sample are determined.
Details of data processing by the FI method mass spectrometry type analysis method are described in “Nisseki Review”, Vol. 33, No. 4, pages 135-142, particularly “2.2.3 Data Processing”. .

The kinematic viscosity of the mineral oil is not particularly limited, but the kinematic viscosity at 40 ° C. is desirably in the range of 1 to 6 mm ² / s.
If the kinematic viscosity (40 ° C) of the mineral oil is too low, there is a risk of increased risk of fire due to ignition. On the other hand, if it is too high, there is a risk that seizure of a lubricating oil component called stain will occur after annealing, surface damage called oil pits may occur on the surface of the work material, resulting in poor surface gloss, and slippage due to overlubrication. There is a risk that the generated amount of wear powder may increase, the surface of the workpiece may be damaged, and if the slip is significant, the processing may become impossible. In consideration of such points, the upper limit of the kinematic viscosity (40 ° C.) of the mineral oil is preferably 6 mm ² / s or less, more preferably 5.5 mm ² / s or less.

  Examples of the fat include beef tallow, lard, soybean oil, rapeseed oil, rice bran oil, coconut oil, palm oil, palm kernel oil, hydrogenated products thereof, or a mixture of two or more of these.

  Examples of the synthetic oil include poly-α-olefins such as ethylene-propylene copolymer, polybutene, 1-octene oligomer, 1-decene oligomer, and hydrides thereof; alkylnaphthalene; alkylbenzene; butyl stearate, octyl laur Monoesters such as dirate; diesters such as ditridecyl glutarate, di-2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di-2-ethylhexyl sepacate; polyesters such as trimellitic acid ester; trimethylolpropane caprylate, Polyol esters such as trimethylolpropane pelargonate, pentaerythritol-2-ethylhexanoate, pentaerythritol pelargonate; polyoxyalkylene glycol; poly Phenyl ether; phosphoric acid esters such as tricresyl phosphate; perfluoropolyether, fluorinated compounds such as fluorinated polyolefins; dialkyl ether silicone oil; or a mixture of two or more thereof.

  Among the above, the base oil is preferably mineral oil alone or a mixture of mineral oil and synthetic oil. Moreover, as a synthetic oil to be mixed, poly α-olefin is preferable from the viewpoints that the odor during use is small, the working environment is improved, and the degreasing property of the surface of the processed product is improved.

The viscosity of the base oil used in the present invention is not particularly limited, kinematic viscosity at generally 40 ° C. is preferably in the range of 0.5~500mm ² / s, and more preferably in a range of from 1 to 200 mm ² / s . Particularly, in the case of using a lubricating oil composition of the present invention during the rolling of aluminum or aluminum alloy, wherein the kinematic viscosity is preferably in the range of 1 to 10 mm ² / s, and more preferably in a range of from 1 to 6 mm ² / s .
In the lubricating oil composition of the present invention, the content of the base oil is arbitrary, but from the viewpoint of the working environment, it is preferably 60% by mass or more, more preferably 65% by mass or more, and more preferably 70% by mass or more based on the total amount of the composition. Even more preferred. On the other hand, from the viewpoint of improving the lubricity of the composition, it is preferably 99% by mass or less, more preferably 98% by mass or less, based on the total amount of the composition.

The lubricating oil composition of the present invention contains a monohydric alcohol having 9 or more carbon atoms as the component (A).
Examples of the component (A) include nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol, tricosanol, Monovalent alkyl alcohols such as tetracosanol; monovalent alkenyl alcohols such as nonenol, decenol, undecenol, dodecenol, tridecenol, tetradecenol, pentadecenol, hexadecenol, heptadecenol, octadecenol, nonadecenol, eicosenol, heneicosenol, tricosenol, tetracosenol And mixtures of two or more thereof. These may be either linear or branched and may be saturated or unsaturated. Preferably, it is a monovalent alkyl alcohol and / or alkenyl alcohol having 9 to 24 carbon atoms, more preferably 10 to 18 carbon atoms, and particularly preferably 12 to 16 carbon atoms.
In the lubricating oil composition of the present invention, when the number of carbon atoms of the component (A) exceeds 24, the removability deteriorates and oil stains and the like tend to occur.

  The content ratio of the component (A) in the lubricating oil composition of the present invention is 0.5 to 15% by mass, preferably 0.7 to 12% by mass, more preferably 0.9 to 10% by mass based on the total amount of the composition. It is. When the content of the component (A) is less than 0.5% by mass, the lubricity tends to be insufficient, and when it exceeds 15% by mass, the removability is deteriorated and oil stains or the like tend to occur. The blending amount of the component (A) can be expected to be combined with the component (B), and is 2 to 8% by mass based on the total amount of the composition in terms of solubility or dispersibility in the base oil or cost. Is the best.

The lubricating oil composition of the present invention contains a monohydric alcohol having 8 or less carbon atoms as the component (B).
Examples of the component (B) include methanol, ethanol, propanol, butanol, pentanol, hexanol, heptanol, octanol; propenol, butenol, pentenol, hexenol, heptenol, octenol; and mixtures thereof. Of these, those other than methanol and ethanol may be linear or branched, and may be saturated or unsaturated. A monohydric alcohol having 2 to 8 carbon atoms, more preferably 3 to 6 carbon atoms, still more preferably 3 to 5 carbon atoms, and particularly preferably 3 to 4 carbon atoms is desirable. At this time, the number of carbon atoms of the component (B) is more preferably 3 or more in terms of flammability and safety.

  The content ratio of the component (B) in the lubricating oil composition of the present invention is 0.05 to 10% by mass, preferably 0.1 to 5% by mass, more preferably 0.3 to 3% by mass based on the total amount of the composition. And may be dissolved or dispersed in the composition. When the content ratio of the component (B) is less than 0.05% by mass, the combined effect with the component (A) is small, and when it exceeds 10% by mass, the lubricity tends to be inhibited. Further, the content ratio of the component (B) can be expected to be combined with the component (A), and is 0. 0 based on the total amount of the composition in terms of solubility or dispersibility in the base oil, safety, or cost. 5-2 mass% is optimal.

  In the lubricating oil composition of the present invention, the content ratio of the component (B) relative to the content ratio of the component (A) is not particularly limited as long as it is within the specified range of the content ratio of the component (A) and the component (B). However, considering that a remarkable combined effect can be exhibited even when the proportion of the component (B) is small, and that the combined effect corresponding to the content ratio becomes small even if the proportion of the component (B) is too large, It is preferable to set it as the ratio of 0.5-500 mass parts of (B) component with respect to 100 mass parts of A) component. In particular, from the viewpoint of solubility or dispersibility in base oil, safety or cost, it is more preferable to set the ratio of component (B) 1 to 100 parts by mass, and further to set the ratio of 2 to 80 parts by mass. Preferably, the ratio is 5 to 40 parts by mass.

  The lubricating oil composition of the present invention contains specific amounts of the component (A) and the component (B) in the base oil, and can exhibit excellent effects without blending other oily agents or extreme pressure agents. Therefore, it is advantageous in terms of cost. In addition, it can demonstrate excellent performance in terms of lubricity and removal of lubricating oil after lubrication, low odor, safety, and stability of lubricating oil, which have been issues as required performance in the past. In order to further improve the performance of the metal processing oil and to provide the performance required as a metalworking oil, components other than the components (A) and (B) may be used as long as the effects of the present invention are not significantly impaired. Furthermore, it can mix | blend.

  Examples of components other than the components (A) and (B) that can be blended in the lubricating oil composition of the present invention include (C) an oxygen-containing compound, (D) an oil-based agent, (E) an olefin, and (F) an antioxidant. Agents, or other additives.

  Examples of the (C) oxygen-containing compound include (C1) an alkylene oxide adduct of a polyhydric alcohol having 3 to 6 hydroxyl groups having a number average molecular weight of 100 or more and less than 1000, (C2) the hydrocarbyl ether of (C1) Or hydrocarbyl ester, (C3) polyalkylene glycol having a number average molecular weight of 100 to less than 1000, (C4) hydrocarbyl ether or hydrocarbyl ester of (C3), (C5) dihydric alcohol having 2 to 20 carbon atoms, (C6) Selected from the group consisting of the hydrocarbyl ether or hydrocarbyl ester of (C5), (C7) a trihydric alcohol having 3 to 20 carbon atoms, and (C8) the hydrocarbyl ether or hydrocarbyl ester of (C7). And at least one oxygen-containing compound.

  Examples of the component (C1) include glycerin; polyglycerin such as diglycerin, triglycerin and tetraglycerin 2-tetramer composed of tetraglycerin; trimethylolalkane such as trimethylolethane, trimethylolpropane and trimethylolbutane. And dimer to tetramer thereof; pentaerythritol, dipentaerythritol, 1,2,4-butanetriol, 1,3,5-pentanetriol, 1,2,6-hexanetriol, 1,2,3,4 Polyhydric alcohols such as butanetetrol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, xylitol, mannitol, idylitol, taritol, dulcitol, allitol, etc .; xylose, arabinose, ribose, rhamnose, gluco It can include fructose, galactose, mannose, sorbose, cellobiose, maltose, isomaltose, trehalose, a sugar such as sucrose. Of these, glycerin, trimethylolalkane, sorbitol, and the like are preferable because they are excellent in adjusting the amount of aluminum adhesion (transfer) to the tool.

As the alkylene oxide constituting the component (C1), those having 2 to 6 carbon atoms, preferably 2 to 4 carbon atoms are used. Examples of the alkylene oxide having 2 to 6 carbon atoms include ethylene oxide, propylene oxide, 1,2-epoxybutane (α-butylene oxide), 2,3-epoxybutane (α-butylene oxide), and 1,2-epoxy. Examples include -1-methylpropane, 1,2-epoxyheptane, and 1,2-epoxyhexane. Of these, ethylene oxide, propylene oxide, butylene oxide and the like are preferable, and ethylene oxide and propylene oxide are more preferable from the viewpoint of excellent adjustability of the amount of adhesion (transfer) of aluminum to the tool.
In addition, when using 2 or more types of alkylene oxide, there is no restriction | limiting in particular in the polymerization form of an oxyalkylene group, You may carry out random copolymerization or block copolymerization. In addition, when alkylene oxide is added to a polyhydric alcohol having 3 to 6 hydroxyl groups, it may be added to all hydroxyl groups, or only to some hydroxyl groups, but aluminum condensation on the tool may be performed. Adducts added to all the hydroxyl groups are preferred from the viewpoint of excellent ability to adjust the amount of adhesion (transfer).

The number average molecular weight of the component (C1) is 100 or more and less than 1000, preferably 100 or more and less than 800. Adducts having a number average molecular weight of less than 100 may reduce the solubility in base oil, and 1000 or more adducts may remain on the surface of the work material during annealing after processing, and may cause stain.
As the component (C1), a product obtained by reacting a polyhydric alcohol having 3 to 6 hydroxyl groups with an alkylene oxide to have a number average molecular weight of 100 or more and less than 1000 may be used. A mixture of a polyhydric alcohol alkylene oxide adduct having 3 to 6 hydroxyl groups obtained by the method or a commercially available mixture of a polyhydric alcohol alkylene oxide adduct having 3 to 6 hydroxyl groups is obtained by distillation or chromatography. What was isolate | separated so that a number average molecular weight may be 100 or more and less than 1000 may be used.
As the component (C1), the above compounds may be used alone or as a mixture of two or more.

As the component (C2), one obtained by hydrolyzing or esterifying a part or all of the terminal hydroxyl groups of the alkylene oxide adduct of the component (C1) can be used. Here, the hydrocarbyl group represents a hydrocarbon group having 1 to 24 carbon atoms.
Examples of the hydrocarbon group having 1 to 24 carbon atoms include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, straight chain or A branched pentyl group, a linear or branched hexyl group, a linear or branched heptyl group, a linear or branched octyl group, a linear or branched nonyl group, a linear or branched decyl group, Linear or branched undecyl group, linear or branched dodecyl group, linear or branched tridecyl group, linear or branched tetradecyl group, linear or branched pentadecyl group, linear or branched A hexadecyl group, a linear or branched heptadecyl group, a linear or branched octadecyl group, a linear or branched nonadecyl group, a linear or branched icosyl group, a linear or branched heicosyl group, a straight Chain or branched docosyl group, straight chain or branched C 1-24 alkyl group such as tricosyl group, linear or branched tetracosyl group; vinyl group, linear or branched propenyl group, linear or branched butenyl group, linear or branched pentenyl Group, linear or branched hexenyl group, linear or branched heptenyl group, linear or branched octenyl group, linear or branched nonenyl group, linear or branched decenyl group, linear or Branched undecenyl group, linear or branched dodecenyl group, linear or branched tridecenyl group, linear or branched tetradecenyl group, linear or branched pentadecenyl group, linear or branched hexadecenyl group , Linear or branched heptadecenyl group, linear or branched octadecenyl group, linear or branched nonadecenyl group, linear or branched icocenyl group, linear or branched heicodecenyl group, linear or branched Branch of docoseni Group, straight chain or branched tricosenyl group, straight chain or branched tetracocenyl group or the like alkenyl group having 2 to 24 carbon atoms; cyclopentyl group, cyclohexyl group, cycloheptyl group or the like cycloalkyl group having 5 to 7 carbon atoms Methylcyclopentyl group, dimethylcyclopentyl group (including all structural isomers), methylethylcyclopentyl group (including all structural isomers), diethylcyclopentyl group (including all structural isomers), methylcyclohexyl group, dimethyl Cyclohexyl group (including all structural isomers), methylethylcyclohexyl group (including all structural isomers), diethylcyclohexyl group (including all structural isomers), methylcycloheptyl group, dimethylcycloheptyl group (all ), Methyl ethyl cycloheptyl group (including all structural isomers), An alkylcycloalkyl group having 6 to 11 carbon atoms such as ethylcycloheptyl group (including all structural isomers); an aryl group having 6 to 10 carbon atoms such as phenyl group and naphthyl group: tolyl group (all structural isomers) ), Xylyl group (including all structural isomers), ethylphenyl group (including all structural isomers), linear or branched propylphenyl group (including all structural isomers), linear Or a branched butylphenyl group (including all structural isomers), a linear or branched pentylphenyl group (including all structural isomers), a linear or branched hexylphenyl group (all structural isomers) Straight chain or branched heptylphenyl group (including all structural isomers), straight chain or branched octylphenyl group (including all structural isomers), straight chain or branched nonyl Phenyl group (including all structural isomers), linear or branched Decylphenyl group (including all structural isomers), linear or branched undecylphenyl group (including all structural isomers), linear or branched dodecylphenyl group (including all structural isomers) C7-C18 alkylaryl group such as benzyl group, phenylethyl group, phenylpropyl group (including isomer of propyl group), phenylbutyl group (including isomer of butyl group), phenylpentyl group ( And an arylalkyl group having 7 to 12 carbon atoms such as a phenylhexyl group (including an isomer of a hexyl group). Of these, a linear or branched alkyl group having 2 to 18 carbon atoms and a linear or branched alkenyl group having 2 to 18 carbon atoms are preferable from the viewpoint of excellent adjustment of the amount of aluminum adhesion (transfer) to the tool. Further, a linear or branched alkyl group having 3 to 12 carbon atoms and an oleyl group which is a residue obtained by removing a hydroxyl group from oleyl alcohol are more preferable.

As the acid used for esterification in the component (C2), carboxylic acid is usually mentioned. The carboxylic acid may be a monobasic acid or a polybasic acid, but usually a monobasic acid is used.
The monobasic acid is a fatty acid having 6 to 24 carbon atoms, which may be linear or branched, and may be saturated or unsaturated. For example, hexanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, octadecanoic acid, hydroxyoctadecanoic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, docosanoic acid , Saturated fatty acids such as tricosanoic acid, tetracosanoic acid, hexenoic acid, heptenoic acid, octenoic acid, nonenic acid, decenoic acid, undecenoic acid, dodecenoic acid, tridecenoic acid, tetradecenoic acid, pentadecenoic acid, hexadecenoic acid, octadecenoic acid, hydroxyoctadecene Examples thereof include unsaturated fatty acids such as acid, nonadecenoic acid, eicosenoic acid, heneicosenoic acid, docosenoic acid, tricosenoic acid, tetracosenoic acid, and mixtures thereof. Of these, saturated fatty acids having 8 to 20 carbon atoms, unsaturated fatty acids having 8 to 20 carbon atoms, and mixtures thereof are particularly preferable.

  Examples of the polybasic acid include dibasic acids having 2 to 16 carbon atoms and trimellitic acid. The dibasic acid having 2 to 16 carbon atoms may be linear or branched, and may be saturated or unsaturated. For example, ethanedioic acid, propanedioic acid, butanedioic acid, pentanedioic acid, hexanedioic acid, octanedioic acid, nonanedioic acid, decanedioic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, Heptadecanedioic acid, hexadecanedioic acid; hexenedioic acid, octenedioic acid, nonenedioic acid, decenedioic acid, undecenedioic acid, dodecenedioic acid, tridecenedioic acid, tetradecenedioic acid, heptadecenedioic acid, hexadecenedioic acid; and these Of the mixture. As the component (C2), the above compounds may be used alone or as a mixture of two or more.

Examples of the component (C3) include those obtained by homopolymerizing or copolymerizing alkylene oxides having 2 to 6 carbon atoms, preferably 2 to 4 carbon atoms.
Examples of the alkylene oxide having 2 to 6 carbon atoms include those listed as alkylene oxides constituting the component (C1). Among these, ethylene oxide, propylene oxide, butylene oxide, and the like are preferable, and ethylene oxide and propylene oxide are more preferable from the viewpoint of excellent adjustment of the amount of aluminum adhesion (transfer) to the tool.
In addition, when using 2 or more types of alkylene oxide for preparation of polyalkylene glycol, there is no restriction | limiting in particular in the polymerization form of an oxyalkylene group, Any of random copolymerization or block copolymerization may be sufficient.

The number average molecular weight of the component (C3) is 100 or more and less than 1000, preferably 120 or more and less than 700. If the number average molecular weight is less than 100, the solubility in the base oil may be lowered. If the number average molecular weight is 1000 or more, there is a possibility of remaining on the surface of the work material during the annealing after processing and causing stain.
As the component (C3), when the alkylene oxide is polymerized, it may be reacted so that the number average molecular weight is 100 or more and less than 1000, or a polyalkylene glycol mixture obtained by any method or commercially available. The polyalkylene glycol mixture may be separated by distillation or chromatography so that the number average molecular weight is 100 or more and less than 1000. As the component (C3), the above compounds may be used alone or as a mixture of two or more.

As the component (C4), a product obtained by hydrolyzing or esterifying a part or all of the terminal hydroxyl groups of the polyalkylene glycol of the component (C3) can be used.
Here, a hydrocarbyl group represents a C1-C24 hydrocarbon group, for example, each group enumerated in description of (C2) is mentioned. Among these, from the viewpoint of excellent adjustment of the amount of aluminum adhesion (transfer) to the tool, an alkyl group having 2 to 18 carbon atoms and an alkenyl group having 2 to 18 carbon atoms are preferable, and an alkyl group having 3 to 12 carbon atoms and An oleyl group is more preferred.
As the component (C4), those obtained by esterifying the terminal hydroxyl group of the polyalkylene glycol of the component (C3) can also be used. As the acid used for esterification, carboxylic acid is usually mentioned. The carboxylic acid may be a monobasic acid or a polybasic acid, but usually a monobasic acid is used, and examples thereof include those listed in the description of the component (C2).
As the component (C4), the above compounds may be used alone or as a mixture of two or more.

The component (C5) is a dihydric alcohol having 2 to 20 carbon atoms, preferably 3 to 18 carbon atoms. Here, a dihydric alcohol means what does not have an ether bond in a molecule | numerator. Examples of such a dihydric alcohol having 2 to 20 carbon atoms include ethylene glycol, 1,3-propanediol, propylene glycol, 1,4-butanediol, 1,2-butanediol, 2-methyl-1, 3-propanediol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 2-ethyl-2-methyl-1,3-propanediol, 2-methyl-2,4-pentanediol, 1 , 7-heptanediol, 2-methyl-2-propyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, 1,8-octanediol, 1,9-nonanediol, 2- Butyl-2-ethyl-1,3-propanediol, 1,10-decanediol, 1,11-undecanediol, 1,12-do Candiol, 1,13-tridecanediol, 1,14-tetradecanediol, 1,15-heptadecanediol, 1,16-hexadecanediol, 1,17-heptadecanediol, 1,18-octadecanediol, 1, Examples include 19-nonadecanediol and 1,20-icosadecanediol. Among them, 1,4-butanediol, 1,5-pentanediol, neopentylglycol, 1,6-hexanediol, 2-methyl-, in terms of excellent ability to adjust the amount of aluminum adhesion (transfer) to the tool 2,4-pentanediol, 2-ethyl-2-methyl-1,3-propanediol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 1,11-undecanediol, 1,12-dodecanediol and the like are preferable.
As the component (C5), the above compounds may be used alone or as a mixture of two or more.

Component (C6) is a hydrocarbyl etherified or esterified dihydric alcohol having 2 to 20 carbon atoms, preferably 3 to 18 carbon atoms (excluding those having an ether bond in the molecule). It is a thing.
As the component (C6), it is possible to use a hydrocarbyl etherified part or all of the terminal hydroxyl groups of the dihydric alcohol of the component (C5). Here, the hydrocarbyl ether group represents a hydrocarbon group having 1 to 24 carbon atoms, and examples thereof include the groups listed in the description of the component (C2). Among these, from the viewpoint of excellent adjustment of the amount of aluminum adhesion (transfer) to the tool, an alkyl group having 2 to 18 carbon atoms and an alkenyl group having 2 to 18 carbon atoms are preferable, and an alkyl group having 3 to 12 carbon atoms and An oleyl group which is a residue obtained by removing a hydroxyl group from oleyl alcohol is more preferable.

As the component (C6), one obtained by esterifying one or both of the terminal hydroxyl groups of the dihydric alcohol of the component (C5) can also be used. As the acid used for esterification, carboxylic acid is usually mentioned. The carboxylic acid may be a monobasic acid or a polybasic acid, but usually a monobasic acid is used, and examples thereof include those listed in the description of the component (C2). The ester of the component (C6) may be a partial ester obtained by esterifying one of the terminal hydroxyl groups of the dihydric alcohol of the component (C5), or may be a complete ester obtained by esterifying both. A partial ester is preferred because it is more excellent in adjusting the amount of aluminum adhesion (transfer).
As the component (C6), the above compounds may be used alone or as a mixture of two or more.

The component (C7) is a trihydric alcohol having 3 to 20 carbon atoms, preferably 3 to 18 carbon atoms. Here, a trihydric alcohol means what does not have an ether bond in a molecule | numerator. Examples of such a trihydric alcohol having 3 to 20 carbon atoms include glycerin, 1,2,3-butanetriol, 1,2,4-butanetriol, 1,2,5-pentanetriol, 1,3, 5-pentanetriol, 1,2,3-pentanetriol, 1,2,4-pentanetriol, 1,2,6-hexanetriol, 1,2,3-hexanetriol, 1,2,4-hexanetriol, 1,2,5-hexanetriol, 1,3,4-hexanetriol, 1,3,5-hexanetriol, 1,3,6-hexanetriol, 1,4,5-hexanetriol, 1,2,7 -Heptanetriol, 1,2,8-octanetriol, 1,2,9-nonanetriol, 1,2,10-decanetriol, 1,2,11-undecant All, 1,2,12-dodecanetriol, 1,2,13-tridecanetriol, 1,2,14-tetradecanetriol, 1,2,15-pentadecanetriol, 1,2,16-hexadecanetriol, 1, 2,17-heptadecanetriol, 1,2,18-octadecanetriol, 1,2,19-nonadecanetriol, 1,2,20-icosantriol and the like can be mentioned. Among these, 1,2,12-dodecanetriol, 1,2,13-tridecantriol, 1,2,14-tetradecanetriol, 1 are preferable because they have excellent ability to adjust the amount of aluminum adhesion (transfer) to the tool. , 2,15-pentadecanetriol, 1,2,16-hexadecanetriol, 1,2,17-heptadecanetriol, 1,2,18-octadecanetriol are preferred.
As the component (C7), the above compounds may be used alone or as a mixture of two or more.

  As the component (C8), there can be used one obtained by hydrocarbyl etherifying part or all of the terminal hydroxyl groups of the trihydric alcohol of the component (C7). Here, the hydrocarbyl ether group represents a hydrocarbon group having 1 to 24 carbon atoms, and examples thereof include the groups listed in the description of the component (C2). Among these, from the viewpoint of excellent adjustment of the amount of aluminum adhesion (transfer) to the tool, an alkyl group having 2 to 18 carbon atoms and an alkenyl group having 2 to 18 carbon atoms are preferable, and an alkyl group having 3 to 12 carbon atoms and An oleyl group which is a residue obtained by removing a hydroxyl group from oleyl alcohol is more preferable.

As the component (C8), one obtained by esterifying some or all of the terminal hydroxyl groups of the trihydric alcohol of the component (C7) can be used. As the acid used for esterification, carboxylic acid is usually mentioned. The carboxylic acid may be a monobasic acid or a polybasic acid, but usually a monobasic acid is used, and examples include those listed in the description of the component (C2). The ester of the component (C8) may be a partial ester obtained by esterifying one or two hydroxyl groups at the terminal of the trihydric alcohol of the component (C7), or a complete ester obtained by esterifying all of them. Although it is good, it is preferable to be a partial ester because it is more excellent in adjusting the amount of aluminum adhesion (transfer).
As the component (C8), among the components (C7), glycerin, 1,2,3-butanetriol, 1,2,4-butanetriol, 1,2,5-pentanetriol, 1,3,5-pentane Triol, 1,2,3-pentanetriol, 1,2,4-pentanetriol, 1,2,6-hexanetriol, 1,2,3-hexanetriol, 1,2,4-hexanetriol, 1,2 , 5-hexanetriol, 1,3,4-hexanetriol, 1,3,5-hexanetriol, 1,3,6-hexanetriol and 1,4,5-hexanetriol, respectively. preferable.
As the component (C8), the above compounds may be used alone or as a mixture of two or more.

In the present invention, one oxygen-containing compound selected from the components (C1) to (C8) may be used alone, or a mixture of two or more oxygen-containing compounds having different structures may be used. good. Among these, the (C3) component, the (C4) component, the (C5) component and the (C8) component are preferable, and the (C3) component is preferable from the viewpoint of excellent adjustment of the amount of aluminum adhesion (transfer) to the tool. , (C4) component and (C8) component are more preferable.
In this invention, when mix | blending the said (C) oxygen-containing compound, 0.005-5 mass% is preferable for the total content on the basis of the composition whole quantity.

The (D) oil-based agent includes those usually used as an oil-based agent for lubricating oils. In order to further improve processability, at least one kind selected from (D1) ester and (D2) carboxylic acid is used. It is preferable to use an oily agent.
As the ester (D1), the constituent alcohol may be a monohydric alcohol or a polyhydric alcohol, and the carboxylic acid may be a monobasic acid or a polybasic acid. Specifically, (D1-1) ester of monohydric alcohol and monobasic acid, (D1-2) ester of polyhydric alcohol and monobasic acid, (D1-3) monohydric alcohol and polybasic acid Ester, (D1-4) ester of polyhydric acid and polybasic acid, (D1-5) monohydric alcohol, mixture of polyhydric alcohol and polybasic acid, (D1-6) polyhydric acid Arbitrary ester such as alcohol, monobasic acid, polybasic acid mixture ester, (D1-7) monohydric alcohol, polyhydric alcohol mixture with monobasic acid, polybasic acid, etc. An ester of a combination of an alcohol and a carboxylic acid can be used and is not particularly limited.
In addition, when a polyhydric alcohol is used as the alcohol component constituting the (D1) ester, it represents a complete ester in which all hydroxyl groups in the polyhydric alcohol are esterified. In addition, when a polybasic acid is used as the carboxylic acid component constituting the (D1) ester, even if it is a complete ester in which all the carboxyl groups in the polybasic acid are esterified, a part of the carboxyl group is not esterified and the carboxyl group The partial ester remaining as it is may be used.

As the monohydric alcohol constituting the component (D1), a monohydric alcohol having 1 to 24 carbon atoms is used, and specific examples include those mentioned in the above-mentioned items (A) and (B).
As the polyhydric alcohol constituting the component (D1), those having 2 to 10 valences, preferably 2 to 6 valences are usually used. Specifically, the dihydric alcohols mentioned in the section of the above (C5) component, the above Examples thereof include the trihydric alcohols mentioned in the section of the (C7) component and the 4-10 hydric alcohols obtained by removing the divalent and trihydric alcohols from those mentioned in the section of the (C1) component.
Examples of the carboxylic acid constituting the component (D1) include monobasic acids and polybasic acids, and specific examples include the carboxylic acids mentioned in the above section (C2).
As the ester of the component (D1), any of the above-mentioned esters can be used. Among them, (D1-1) an ester of a monohydric alcohol and a monobasic acid is preferable from the viewpoint of excellent processability.
The total carbon number of the component (D1) is not particularly limited, but the total carbon number is preferably 7 or more, more preferably 9 or more, and most preferably 11 or more, from the viewpoint of excellent workability improvement effect. Further, if the carbon number is too large, the risk of increasing the occurrence of stains and corrosion increases, so the total carbon number is preferably 26 or less, more preferably 24 or less, and most preferably 22 or less.

  Examples of (D2) carboxylic acid include (D2-1) monobasic acid or (D2-2) polybasic acid, and examples thereof include the compounds listed as the carboxylic acid mentioned in the above section (C2). Of these, monovalent carboxylic acids are preferred from the viewpoint of better processability. Moreover, from the point which is more excellent in workability, a C6 or more carboxylic acid is preferable, a C8 or more carboxylic acid is more preferable, and a C10 or more carboxylic acid is the most preferable. Moreover, since possibility that the generation | occurrence | production of a stain and corrosion will increase will become large when carbon number is too large, a C20 or less carboxylic acid is preferable, a C18 or less carboxylic acid is more preferable, and a C16 or less carbonic acid is preferable. Carboxylic acid is most preferred.

As the (D) oily agent, only one kind selected from various oily agents as described above may be used, or a mixture of two or more kinds may be used, but the workability can be further improved. (D1-1) an ester having a total carbon number of 7 to 26 such as butyl stearate obtained from a monohydric alcohol and a monobasic acid; (D2-1) a single base having a carbon number of 6 to 20 such as oleic acid Acids and mixtures thereof are preferred.
When the (D) oiliness agent is blended in the lubricating oil composition of the present invention, the total content is preferably 0.01 to 15% by mass based on the total amount of the lubricating oil composition.

  As said (E) olefin, a C6-C40 linear olefin is mentioned preferably. By blending this linear olefin into the composition, a lubricating oil composition having further excellent lubricity can be obtained. When the carbon number of the straight chain olefin is less than 6, it is not suitable because the flash point is low, and the carbon number is preferably 8 or more, more preferably 10 or more, and more preferably 12 or more in consideration of a moderately high flash point. Even more preferred. Further, when the straight-chain olefin has more than 40 carbon atoms, it is difficult to use because it is in a solid state, and is difficult to mix and dissolve with other components such as base oil and additives. Furthermore, those having more than 40 carbon atoms are not common and are difficult to obtain. In consideration of such inconvenience, the linear olefin preferably has 30 or less carbon atoms.

As said linear olefin, what has 1 or 2 or more double bonds in a molecule | numerator is mentioned, What has 1 double bond is more preferable. The position of the double bond is not particularly limited, but since the resulting lubricating oil composition is more excellent in lubricity, it has a double bond at the end, that is, the linear olefin is an n-α-olefin. preferable.
Specific examples of the linear olefin include 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-icocene or a mixture of two or more thereof. These may be used alone or in combination of two or more linear olefins.
The linear olefin can be obtained by various production methods. For example, an ethylene oligomer obtained by polymerizing ethylene by a usual means can be used.
In the lubricating oil composition of the present invention, when the component (E) is blended, the content thereof is arbitrary, but from the viewpoint of improving the lubricity of the composition, it is preferably 1 to 30% by mass based on the total amount of the composition. More preferably, it is 3-25 mass%, More preferably, it is 5-20 mass%.

  Examples of the (F) antioxidant include 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, and 2,6-di-tert- Monophenol antioxidants such as butyl-4-n-propylphenol and 2,6-di-tert-butyl-4-n-butylphenol; n-octadecyl-3- (3,5-di-tert-butyl- 4-hydroxyphenyl) propionate, n-octyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 2-ethylhexyl-3- (3,5-di-tert-butyl-4- Hydroxyphenyl) propionate, methyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 2-ethylhexyl-3- (3- 3,5-dialkyl-4-hydroxyphenyl group-substituted fatty acid ester antioxidants such as ert-butyl-5-methyl-4-hydroxyphenyl) propionate; 2,2′-methylenebis- (4-methyl-6-tert) -Butylphenol), 2,2'-methylenebis- (4,6-di-tert-butylphenol), 2,2'-butylidenebis- (4-methyl-6-tert-butylphenol), 2,2'-methylenebis- ( 4-methyl-6-tert-butylphenol), 4,4′-butylidenebis- (6-tert-butyl-3-methylphenol), 4,4′-methylenebis- (2,6-di-tert-butylphenol), Bisphenol antioxidants such as 4,4′-bis- (2,6-di-tert-butylphenol), phenyl-α-naphthylamine, etc. And aromatic metal-based antioxidants, and organometallic compounds such as zinc dialkyldithiophosphate.

  Among these, n-octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, n-octyl-3-ylate are superior in terms of oxidation stability, stain resistance, and sludge prevention properties. (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 2-ethylhexyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, methyl-3- (3,5 3,5-dialkyl-4-hydroxyphenyl groups such as -di-tert-butyl-4-hydroxyphenyl) propionate, 2-ethylhexyl-3- (3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate Substituted fatty acid ester antioxidants are preferred, and 2-ethylhexyl-3- (3,5-di-tert-butyl- - hydroxyphenyl) propionate, 2-ethylhexyl -3- (3-tert- butyl-5-methyl-4-hydroxyphenyl) propionate is most preferred.

Examples of other additives that can be incorporated into the lubricating oil composition of the present invention as necessary include extreme pressure additives, rust inhibitors, corrosion inhibitors, antifoaming agents, etc. Two or more kinds can be combined and blended.
Examples of the extreme pressure additive include phosphorus compounds such as tricresyl phosphate and organometallic compounds such as zinc dialkyldithiophosphate.
Examples of rust inhibitors include salts of fatty acids such as oleic acid, sulfonates such as dinonylnaphthalene sulfonate, partial esters of polyhydric alcohols such as sorbitan monooleate, amines and derivatives thereof, phosphate esters and derivatives thereof it can.
Examples of the corrosion inhibitor include benzotriazole.
Examples of antifoaming agents include silicon-based ones.
When these other additives are blended, the total content is usually 0.1 to 15% by mass, preferably 10% by mass or less, based on the total amount of the composition.

The viscosity of the lubricating oil composition suitable for metal processing of the present invention is not particularly limited, but in general, the kinematic viscosity at 40 ° C. is preferably in the range of 0.5 to 500 mm ² / s, A range of 1 to 200 mm ² / s is more preferable. In particular, when the lubricating oil composition of the present invention is used in the rolling process of an aluminum-based material, the kinematic viscosity at 40 ° C. is preferably in the range of 1 to 10 mm ² / s, and 1 to 8 mm ² / s. A range is more preferable. In the aluminum rolling process, when a so-called foil having a thickness of 0.1 mm or less is formed as a viscosity range in which both lubricity and surface quality are compatible, the kinematic viscosity at 40 ° C. is 1 mm ² / s to 3 mm ^2. / S or less is preferable, and when forming a so-called strip having a thickness exceeding 0.1 mm or 0.2 mm or more, the kinematic viscosity at 40 ° C. is 2 mm ² / s or more and 6 mm ² / s or less. Is preferred.

Hereinafter, the contents of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these.
Examples 1-9 and Comparative Examples 1-8
Various lubricating oil compositions having the compositions shown in Tables 1 and 2 were prepared, and the following various tests were performed on these compositions. The results are shown in Tables 1 and 2. In addition, the used base oil, each component, and rolling material are as follows.
Base oil: non-aromatic mineral oil, kinematic viscosity at 40 ° C. 2.2 mm ² / s (aromatic content: 0.7% by volume, paraffin content: 28.2% by volume, naphthene content: 71.1% by volume)
A1: lauryl alcohol, A2: aliphatic monohydric alcohol mixture _{(C 10: C 12: C} 14: C 16 = 3: 50: 40: 7 ( weight ratio)), A3: oleyl alcohol, B1: hexanol, B2: Butanol, B3: isopropanol, oil agent 1: butyl stearate, oil agent 2: oleic acid.

(1) Lubricity evaluation test Using a lubricating oil composition having each composition shown in Tables 1 and 2, cold rolling of an aluminum material (JIS A-1050 material: 0.65 mm thickness) was performed at a rolling speed of 60 m / min and a reduction. Rolling is carried out under the condition that the rate ((initial thickness of the material−remaining thickness of the rolled material) / initial thickness of the material × 100%) is gradually increased from 40% and the surface of the material is not damaged. The highest possible rolling reduction (rolling limit rolling reduction) was measured.
(2) Wear powder generation test Cold rolling of aluminum material (JIS A-1050 material: 0.65 mm thickness) using a lubricating oil composition having each composition shown in Tables 1 and 2 was performed at a rolling reduction of 40%. The test was carried out at a speed of 135 m / min for 10 minutes, and the amount of wear powder in oil and the amount of wear powder adhering to the material surface after rolling were measured. Each numerical value is converted to the value generated when rolling 1m ² of material, and the sum of those values (amount of wear powder in oil + amount of wear powder adhering to material surface) is the amount of wear powder generated (mg / m ² ) It was.
(3) Removability test 0.2 g of lubricating oil composition of each composition shown in Tables 1 and 2 was sandwiched between aluminum materials (JIS A5182 material), heated from room temperature to 350 ° C. over 150 minutes, and held for 1 hour. did. After returning to room temperature, stain generation and water wettability were evaluated.
As for the degree of stain occurrence, 0 points were given when no stain was produced and 5 points were given, and the average value of 10 similar samples was determined. Water wettability was evaluated by spraying distilled water from a distance of 50 cm from an aluminum material and repelling the water. The thing which does not repel water was set as (circle), and the thing which repels even one part was set as x.

Lubricating oil compositions (Examples 1 to 9) according to the present invention shown in Table 1 are lubricity (rolling limit rolling reduction, wear powder generation amount), lubricating oil removability after lubrication (stain prevention, water wetting) Property) and stability (anti-stain property), low odor, and no problem with safety.
On the other hand, the lubricating oil compositions (Comparative Examples 1 to 8) that do not satisfy the provisions of the present invention shown in Table 2 have particularly high wear powder generation and inferior lubricity. Also, instead of the component (B), ester It can be seen that the use of carboxylic acid or the carboxylic acid (Comparative Examples 5 to 8) is inferior in lubricating oil removability after lubrication.

Claims (1)

Including at least one base oil selected from the group consisting of mineral oils, fats and oils, (A) monohydric alcohols having 9 or more carbon atoms, and (B) monohydric alcohols having 8 or less carbon atoms, and ( A) The content ratio of monohydric alcohol having 9 or more carbon atoms is 0.5 to 15% by mass based on the total amount of the composition, and the content ratio of (B) monohydric alcohol having 8 or less carbon atoms is based on the total amount of the composition. A lubricating oil composition for processing a non-aqueous aluminum material, characterized by being 0.05 to 10% by mass.