JP5566037B2 - Oil processing composition for aluminum processing with ultra-trace oil supply - Google Patents

Description

  The present invention relates to an oil composition for processing aluminum with a trace amount oil supply.

Aluminum processing includes cutting processing, grinding processing, rolling processing, forging processing, press processing, drawing processing, rolling processing, and the like. Usually, these aluminum processing is performed using a lubricant.
For example, in cutting and grinding, productivity in machining, such as extending the life of tools such as drills, end mills, tools, and grindstones used in machining, improving the surface roughness of workpieces, and thereby improving machining efficiency For the purpose of improving the quality, oil for cutting and grinding is usually used.

  The cutting and grinding fluids are water-soluble cutting and grinding fluids that use diluted surfactant and lubricant components in water, and water-insoluble cutting and grinding fluids that use mineral oil as the main ingredient. There are roughly two types of processing oils. In the conventional cutting / grinding process, a relatively large amount of the cutting / grinding oil is supplied to the processing site regardless of which oil is used.

  The most basic and important functions of the oil for cutting and grinding are lubrication and cooling. In general, water-insoluble cutting and grinding fluids are excellent in lubrication performance, and water-soluble cutting and grinding fluids are excellent in cooling performance. The water-insoluble oil usually requires a large amount of water-insoluble cutting / grinding oil of several liters per minute to tens of liters in some cases.

  Cutting and grinding fluids effective for improving the processing efficiency are not preferable from another aspect, and a typical problem is the influence on the environment. Regardless of water-insolubility and water-solubility, oils gradually deteriorate during use and eventually become unusable. For example, in the case of a water-soluble oil agent, the stability of the liquid is reduced due to the generation of microorganisms, resulting in separation of components, or the sanitary environment is significantly reduced, making its use impossible. Further, in the case of a water-insoluble oil agent, an acidic component generated by the progress of oxidation corrodes the metal material or causes a significant change in viscosity, making it impossible to use. Further, the oil agent adheres to chips and is consumed and becomes waste.

  In such a case, the deteriorated oil is discarded and a new oil is used. At this time, the oil discharged as waste requires various treatments so as not to affect the environment. For example, cutting and grinding fluids that have been developed with a priority on improving work efficiency often use chlorinated compounds that may generate toxic dioxins during incineration. Processing is required. For this reason, cutting and grinding fluids that do not contain chlorinated compounds have also been developed, but even with such cutting and grinding fluids that do not contain such harmful components, there is a problem of environmental impact associated with the massive discharge of waste. is there. Further, in the case of water-soluble oils, there is a possibility of polluting the environmental water area, so it is necessary to perform advanced treatment at high cost.

  Recently, in order to deal with the above-mentioned problems, a study is being made to replace the cutting / grinding fluid by blowing cold air on the cutting / grinding portion and cooling it. On the other hand, it is impossible to obtain one of the properties required for lubrication.

Under such a background, cutting while supplying an extremely small amount of oil agent of about 1 / 100,000 to 1 / 1000,000 in comparison with the amount of oil agent used in normal cutting / grinding work together with a compressed fluid (for example, compressed air).・ A very small amount of oil supply method for grinding and grinding has been developed. In this system, the cooling effect by compressed air can be obtained, and the amount of waste can be reduced because a very small amount of oil is used, so that the environmental impact caused by the large amount of waste can also be improved ( For example, see Patent Document 1.)
In such a trace amount oil supply method cutting / grinding method, conventionally, additives such as an oily agent and an extreme pressure agent have been used in order to improve processing efficiency. Oily agents such as sulfides of saturated carboxylic acids, polyoxyalkylene compounds, esters, hydrocarbyl ethers of polyhydric alcohols, and amines are used, and usually 0.1 to 15% by mass is added and used based on the total amount of the composition. (For example, refer to Patent Document 2).

International Publication No. 02/081605 JP 2006-249369 A

In recent years, further improvement in performance has been demanded for the oil used in the above-described aluminum processing. For example, in cutting / grinding using a very small amount of oil supply method (MQL method), a good surface workpiece can be obtained even if the amount of oil supply is extremely small, and the wear of tools and the like is low. Therefore, it is desirable that cutting and grinding can be performed efficiently. Therefore, higher performance is required for the cutting and grinding fluid. Conventionally, in processing such as aluminum cutting, esters have been used to reduce friction and wear during processing. Esters are used not only as additives because they have high lubricity and stability, but also as base oils that occupy most of the oils.
However, there is a limit to the performance of oils mainly composed of esters, and there is an urgent need for the development of higher-performance processing oils for further improvement of productivity.

This invention is made | formed in view of such a situation, and it aims at providing the oil agent composition for aluminum processing suitable for MQL processing which can achieve a high level processing performance.
As a result of intensive studies to achieve the above object, the present inventors have found that the above problems can be solved by using an oil agent composition containing a specific amount of an alcohol compound having a specific structure, and completed the present invention. It came to do.

  That is, the present invention contains an alcohol compound having 1 to 8 hydroxyl groups and having 2 to 27 carbon atoms in an amount of 16 to 100% by mass based on the total amount of the composition. The present invention relates to a processing oil composition.

  The oil composition for aluminum processing of the present invention with a very small amount of oil supply balances the improvement of processing efficiency, tool life, and handling in aluminum processing such as cutting, grinding, and rolling. It becomes possible to improve sufficiently.

  The present invention will be described below.

  As the oil composition for aluminum processing of the present invention, the alcohol compound having 1 to 8 hydroxyl groups and having 2 to 27 carbon atoms (hereinafter referred to as the alcohol compound according to the present invention) is used. . By using the alcohol compound according to the present invention as an oil agent component, it is possible to achieve a high level of well-balanced improvement in processing efficiency, tool life, and handleability.

  Of the alcohol compounds according to the present invention, the monohydric alcohol is preferably a linear or branched alcohol having 3 to 18 carbon atoms, or a cycloalkyl alcohol or alkylcycloalkyl alcohol having 5 to 10 carbon atoms. It is done. Specifically, linear or branched propanol (n-propanol, 1-methylethanol, etc.), linear or branched butanol (n-butanol, 1-methylpropanol, 2-methylpropanol, etc.) ), Linear or branched pentanol (n-pentanol, 1-methylbutanol, 2-methylbutanol, 3-methylbutanol, etc.), linear or branched hexanol (n-hexanol, 1 -Methylpentanol, 2-methylpentanol, 3-methylpentanol, etc.), linear or branched heptanol (n-heptanol, 1-methylhexanol, 2-methylhexanol, 3-methylhexanol, 4- Methyl hexanol, 5-methyl hexanol, 2,4-dimethyl pentanol, etc.), linear or branched Butanol (n-octanol, 2-ethylhexanol, 1-methylheptanol, 2-methylheptanol, etc.), linear or branched nonanol (n-nonanol, 1-methyloctanol, 3,5,5- Trimethylhexanol, 1- (2′-methylpropyl) -3-methylbutanol, etc.), linear or branched decanol (n-decanol, iso-decanol, etc.), linear or branched undecanol ( n-undecanol, etc.), linear or branched dodecanol (n-dodecanol, iso-dodecanol, etc.), linear or branched tridecanol, linear or branched tetradecanol (n- Tetradecanol, iso-tetradecanol, etc.), linear or branched pentadecanol, linear or branched Xadecanol (n-hexadecanol, iso-hexadecanol, etc.), linear or branched heptadecanol, linear or branched octadecanol (n-octadecanol, iso-octadecanol) And the like), cyclopentanol, cyclohexanol, methylcyclohexanol, dimethylcyclohexanol, cycloheptanol and the like.

  Of the alcohol compounds according to the present invention, a polyhydric alcohol having 2 to 8 hydroxyl groups is used as the polyhydric alcohol.

  Specific examples of the dihydric alcohol (diol) include ethylene glycol, 1,2-propanediol (propylene glycol), 1,3-propanediol, 1,4-butanediol, 1,2-butanediol, 2-methyl-1,2-propanediol, 2-methyl-1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,2-pentanediol, 1,3-pentanediol, 1 , 4-pentanediol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 2-ethyl-2-methyl-1,3-propanediol, 1,7-heptanediol, 2-methyl- 2-propyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, 1,8-octanedi Lumpur, 1,9-nonanediol, 1,10-decanediol, 1,11-decanediol, 1,12-dodecane diol.

  Specific examples of trihydric or higher alcohols include trimethylolethane, trimethylolpropane, trimethylolbutane, di- (trimethylolpropane), tri- (trimethylolpropane), pentaerythritol, di- ( Pentaerythritol), tri- (pentaerythritol), glycerol, polyglycerol (2 to 20 mer of glycerol), 1,3,5-pentanetriol, sorbitol, sorbitan, sorbitol glycerol condensate, adonitol, arabitol, xylitol, mannitol Polyhydric alcohol such as xylose, arabinose, ribose, rhamnose, glucose, fructose, galactose, mannose, sorbose, cellobiose, maltose, isomaltose, trehalose, shuku Over scan, raffinose, gentianose, sugars such as melezitose, and their partially etherified products and methyl glucosides, (glycoside) and the like. Among these, neopentyl glycol, trimethylol ethane, trimethylol propane, trimethylol butane, di- (trimethylol propane), tri- (trimethylol propane), pentaerythritol, di- (pentaerythritol), tri- (penta Hindered alcohols such as erythritol are preferred.

  In addition, when using a polyhydric alcohol, what is called a partial ester by which a part of hydroxyl group was esterified may be sufficient.

Among the alcohol compounds according to the present invention, a saturated monohydric alcohol having a branched chain is particularly preferably used from the viewpoint of aluminum processability.
Two or more kinds of the alcohol compounds according to the present invention can be mixed and used.

  The content of the alcohol compound according to the present invention is required to be 16% by mass or more, preferably 18% by mass or more, more preferably from the viewpoint of improvement in processing efficiency and tool life, based on the total amount of the composition. It is 20 mass% or more. Further, from the viewpoint of handleability, it is 100% by mass or less, more preferably 95% by mass or less, still more preferably 90% by mass or less, and most preferably 80% by mass or less, based on the total amount of the composition.

  The base oil of the aluminum processing oil composition of the present invention may be the base oil of the alcohol compound according to the present invention alone, and may be used for ordinary lubricating oils as long as the processing efficiency, tool life, and handleability are not impaired. The base oil to be used can be mixed and used. As such base oil, mineral oil or synthetic oil is used. These may be a mixture.

  As mineral oil, for example, a lubricating oil fraction obtained by subjecting crude oil to atmospheric distillation and vacuum distillation is subjected to solvent removal, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, catalytic dewaxing, hydrogenation. Examples thereof include paraffinic mineral oil or naphthenic mineral oil that is refined by appropriately combining one or more purification treatments such as purification, sulfuric acid washing, and clay treatment.

  Synthetic oils include, for example, propylene oligomer, polybutene, polyisobutylene, 1-octene oligomer, 1-decene oligomer, ethylene and propylene co-oligomer, ethylene and 1-octene co-oligomer, and ethylene and 1-decene. Poly α-olefins such as co-oligomers or their hydrides; isoparaffins; alkyl benzenes such as monoalkyl benzenes, dialkyl benzenes, polyalkyl benzenes; alkyl naphthalenes such as monoalkyl naphthalenes, dialkyl naphthalenes, polyalkyl naphthalenes; dioctyl adipates, di-2- Dibasic acid esters such as ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di-2-ethylhexyl sebacate, ditridecyl glutarate; Tribasic acid esters such as acids; polyol esters such as trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythritol 2-ethylhexanoate, pentaerythritol pelargonate; polyethylene glycol, polypropylene glycol, polyoxyethyleneoxypropylene glycol Polyglycols such as polyethylene glycol monoether, polypropylene glycol monoether, polyoxyethyleneoxypropylene glycol monoether, polyethylene glycol diether, polypropylene glycol diether, polyoxyethyleneoxypropylene glycol diether; monoalkyl diphenyl ether, dialkyl diphenyl ether, Monoalkyltriphenyl ether , Phenyl ethers such as dialkyl triphenyl ether, tetraphenyl ether, monoalkyl tetraphenyl ether, dialkyl tetraphenyl ether and pentaphenyl ether; silicone oils; fluoro ethers such as perfluoro ether, etc. It can use individually or in combination of 2 or more types.

Among the above base oils, monoesters and / or diesters (excluding alicyclic dicarboxylic acid ester compounds) are preferable, and the esters (a) to (c) shown below are more preferable, from the viewpoint of further improving the handleability. (A) and (c) are more preferred.
(A) ester of monohydric alcohol and monobasic acid (b) ester of dihydric alcohol and monobasic acid (c) ester of monohydric alcohol and dibasic acid

  Examples of the monohydric alcohol and the dihydric alcohol include the same monohydric alcohols and dihydric alcohols as the alcohol compounds according to the present invention described above.

  As the monobasic acid, a fatty acid having 2 to 24 carbon atoms is usually used. The fatty acid may be linear or branched, and may be saturated or unsaturated. Specifically, for example, acetic acid, propionic acid, linear or branched butanoic acid, linear or branched pentanoic acid, linear or branched hexanoic acid, linear or branched heptane Acid, linear or branched octanoic acid, linear or branched nonanoic acid, linear or branched decanoic acid, linear or branched undecanoic acid, linear or branched dodecane Acid, linear or branched tridecanoic acid, linear or branched tetradecanoic acid, linear or branched pentadecanoic acid, linear or branched hexadecanoic acid, linear or branched heptadecane Acid, linear or branched octadecanoic acid, linear or branched nonadecanoic acid, linear or branched icosanoic acid, linear or branched henicosanoic acid, linear or branched docosane Acid, linear or branched tricosanoic acid, Saturated fatty acids such as linear or branched tetracosanoic acid, acrylic acid, linear or branched butenoic acid, linear or branched pentenoic acid, linear or branched hexenoic acid, linear or Branched heptenoic acid, linear or branched octenoic acid, linear or branched nonenic acid, linear or branched decenoic acid, linear or branched undecenoic acid, linear or Branched dodecenoic acid, linear or branched tridecenoic acid, linear or branched tetradecenoic acid, linear or branched pentadecenoic acid, linear or branched hexadecenoic acid, linear or Branched heptadecenoic acid, linear or branched octadecenoic acid, linear or branched nonadecenoic acid, linear or branched icosenoic acid, linear or branched henicosenoic acid, linear or Branched docosenoic acid, linear or branched Jo of tricosenoic acid, unsaturated fatty acids such as straight-chain or branched tetracosenoic acid, and mixtures thereof. Among these, from the point of improvement of processing efficiency and tool life, and handleability, a saturated fatty acid having 3 to 20 carbon atoms, an unsaturated fatty acid having 3 to 22 carbon atoms, and a mixture thereof are particularly preferable, and those having 4 to 18 carbon atoms. Saturated fatty acids, unsaturated fatty acids having 4 to 18 carbon atoms and mixtures thereof are more preferred, unsaturated fatty acids having 4 to 18 carbon atoms are more preferred, and saturated fatty acids having 4 to 18 carbon atoms are further preferred from the viewpoint of anti-stickiness. preferable.

  Examples of the dibasic acid include dibasic acids having 2 to 16 carbon atoms. The dibasic acid having 2 to 16 carbon atoms may be linear or branched, and may be saturated or unsaturated. Specifically, ethanedioic acid, propanedioic acid, linear or branched butanedioic acid, linear or branched pentanedioic acid, linear or branched hexanedioic acid, linear or Branched heptanedioic acid, linear or branched octanedioic acid, linear or branched nonanedioic acid, linear or branched decanedioic acid, linear or branched undecanedioic acid , Linear or branched dodecanedioic acid, linear or branched tridecanedioic acid, linear or branched tetradecanedioic acid, linear or branched heptadecanedioic acid, linear or branched Hexadecanedioic acid, linear or branched hexenedioic acid, linear or branched heptenedioic acid, linear or branched octenedioic acid, linear or branched nonenedioic acid, Linear or branched decenedioic acid, linear or branched undecenedioic acid, linear or branched Dodecenedioic acid, linear or branched tridecenedioic acid, linear or branched tetradecenedioic acid, linear or branched heptadecenedioic acid, linear or branched hexadecenedioic acid and These mixtures etc. are mentioned.

  The base oil of the aluminum processing oil composition of the present invention may be any alcohol compound according to the present invention as long as the alcohol compound according to the present invention is contained in an amount of 16% by mass or more based on the total amount of the composition. Any type and blending amount of the base oil other than the compound may be used.

  The aluminum processing oil composition of the present invention preferably contains an oily agent from the viewpoint of improving processing efficiency and tool life. As the oily agent, (A) carboxylic acid, (B) sulfide of unsaturated carboxylic acid, (C) compound represented by the following general formula (1), (D) represented by the following general formula (2) Compounds, (E) polyoxyalkylene compounds, (F) esters, (G) hydrocarbyl ethers of polyhydric alcohols, (H) amines, and the like.

[In Formula (1), ^{R 1} represents a hydrocarbon group having 1 to 30 carbon atoms, a represents an integer of 1 to 6, b is an integer of 0-5. ]

[In formula (2), ^{R 2} represents a hydrocarbon group having 1 to 30 carbon atoms, c is an integer of 1 to 6, d is an integer of 0-5. ]

  (A) The carboxylic acid may be a monobasic acid or a polybasic acid. From the viewpoint of improvement in processing efficiency and tool life, monovalent carboxylic acids having 1 to 40 carbon atoms are preferable, more preferably carboxylic acids having 5 to 25 carbon atoms, and most preferably carboxylic acids having 5 to 20 carbon atoms. It is. These carboxylic acids may be linear or branched and may be saturated or unsaturated, but are preferably saturated carboxylic acids from the standpoint of stickiness prevention. Specifically, the same thing as the monobasic acid and polybasic acid which were illustrated in description of above-mentioned ester can be mentioned.

  (B) As a sulfide of unsaturated carboxylic acid, the sulfide of unsaturated thing among the carboxylic acids of said (A) can be mentioned, for example. Preferably, a sulfide of oleic acid can be used.

(C) In the compound represented by the general formula (1), the hydrocarbon group having 1 to 30 carbon atoms represented by R ¹ is, for example, a linear or branched alkyl group having 1 to 30 carbon atoms, A cycloalkyl group having 5 to 7 carbon atoms, an alkylcycloalkyl group having 6 to 30 carbon atoms, a linear or branched alkenyl group having 2 to 30 carbon atoms, an aryl group having 6 to 10 carbon atoms, and a 7 to 30 carbon atom Examples thereof include an alkylaryl group and an arylalkyl group having 7 to 30 carbon atoms. In these, it is preferable that it is a C1-C30 linear or branched alkyl group, More preferably, it is a C1-C20 linear or branched alkyl group, More preferably, it is C1-C1. 10 linear or branched alkyl groups, and most preferably a linear or branched alkyl group having 1 to 4 carbon atoms. Examples of the linear or branched alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, a linear or branched propyl group, and a linear or branched butyl group.

  The substitution position of the hydroxyl group is arbitrary, but when it has two or more hydroxyl groups, it is preferably substituted with an adjacent carbon atom. a is preferably an integer of 1 to 3, and more preferably 2. b is preferably an integer of 0 to 3, more preferably 1 or 2. Examples of the compound represented by the general formula (1) include p-tert-butylcatechol.

(D) In the compound represented by the general formula (2), examples of the hydrocarbon group having 1 to 30 carbon atoms represented by R ² are represented by R ¹ in the general formula (1). The same thing as the example of a C1-C30 hydrocarbon group can be mentioned, and the example of a preferable thing is also the same. The substitution position of the hydroxyl group is arbitrary, but when it has two or more hydroxyl groups, it is preferably substituted with an adjacent carbon atom. c is preferably an integer of 1 to 3, and more preferably 2. d is preferably an integer of 0 to 3, more preferably 1 or 2. Examples of the compound represented by the general formula (2) include 2,2-dihydroxynaphthalene and 2,3-dihydroxynaphthalene.

  (E) As a polyoxyalkylene compound, the compound represented, for example by the following general formula (3) or (4) can be mentioned.

_{^{R 3 O- (R 4 O)}} e -R 5 (3)
[In Formula (3), R ³ and R ⁵ each independently represents a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, R ⁴ represents an alkylene group having 2 to ⁴ carbon atoms, and e is a number average. It represents an integer having a molecular weight of 100 to 3500. ]

_{^{A - [(R 6 O)}} f -R 7] g (4)
Wherein (4), A represents the residue obtained by removing some or all of the hydrogen atoms of the hydroxyl groups of a polyhydric alcohol having 3-8 hydroxyl groups, R ⁶ represents an alkylene group having 2 to 4 carbon atoms , R ⁷ represents a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, f represents an integer having a number average molecular weight of 100 to 3500, g represents the number of hydrogen atoms removed from the hydroxyl group of A, and Represents the same number. ]

In the general formula (3), at least one of R ³ and R ⁵ is preferably a hydrogen atom. Examples of the hydrocarbon group having 1 to 30 carbon atoms represented by R ³ and R ^5, for example, the same as the examples of the hydrocarbon group having 1 to 30 carbon atoms represented by R ¹ in the general formula (1) Examples of preferred ones are also the same. Specific examples of the alkylene group having 2 to 4 carbon atoms represented by R ⁴ include an ethylene group, a propylene group (methylethylene group), and a butylene group (ethylethylene group). e is preferably an integer such that the number average molecular weight is 300 to 2,000, and more preferably an integer such that the number average molecular weight is 500 to 1,500.

In the general formula (4), specific examples of the polyhydric alcohol having 3 to 8 hydroxyl groups constituting A are the same as those of the alcohol compound according to the present invention.
Examples of the alkylene group having 2 to 4 carbon atoms represented by R ⁶ may be the same as the examples of the alkylene group having 2 to 4 carbon atoms represented by R ⁴ in the general formula (3) . As examples of the hydrocarbon group having 1 to 30 carbon atoms represented by R ⁷ are given the same as examples of the hydrocarbon group having 1 to 30 carbon atoms represented by R ¹ in the general formula (1) Examples of preferred ones are the same. At least one of g R ⁷ is preferably a hydrogen atom, more preferably all hydrogen atoms. f is preferably an integer such that the number average molecular weight is 300 to 2,000, more preferably an integer such that the number average molecular weight is 500 to 1,500.

  (F) As ester, the alcohol which comprises this may be monohydric alcohol or polyhydric alcohol, and carboxylic acid may be monobasic acid or polybasic acid.

  Examples of the monohydric alcohol and polyhydric alcohol constituting the ester include the same monohydric alcohol and polyhydric alcohol exemplified in the description of the alcohol compound according to the present invention. Examples of the monobasic acid and polybasic acid constituting the ester can also be the same as the monobasic acid and polybasic acid exemplified in the above description of the ester.

  When a polyhydric alcohol is used as the alcohol component, it may be a complete ester in which all the hydroxyl groups in the polyhydric alcohol are esterified, or a partial ester in which some of the hydroxyl groups are not esterified and remain as hydroxyl groups. Good. Further, when a polybasic acid is used as the carboxylic acid component, it may be a complete ester in which all the carboxyl groups in the polybasic acid are esterified, or a part of the carboxyl group is not esterified and remains as a carboxyl group. It may be a partial ester.

  Although the total carbon number of the ester is not particularly limited, an ester having a total carbon number of 7 or more is preferable, an ester of 9 or more is more preferable, and an ester of 11 or more is most preferable from the viewpoint of improvement in processing efficiency and tool life. . Further, from the viewpoint of not increasing the occurrence of stain and corrosion, and compatibility with organic materials, an ester having a total carbon number of 60 or less is preferred, an ester of 45 or less is more preferred, an ester of 26 or less is more preferred, 24 or less esters are more preferred, and 22 or less esters are most preferred.

(G) As the polyhydric alcohol constituting the hydrocarbyl ether of the polyhydric alcohol, those having 2 to 8 valences, preferably 2 to 6 valences are usually used. Specific examples of the polyhydric alcohol having 3 to 8 hydroxyl groups are the same as those of the alcohol compound according to the present invention. These polyhydric alcohols may be used alone or in combination of two or more.
Preferred polyhydric alcohols include ethylene glycol, propylene glycol, neopentyl glycol, glycerin, trimethylol ethane, trimethylol propane, pentaerythritol, sorbitan, and mixtures thereof. Among these, glycerin is most preferable from the viewpoint of improving the processing efficiency and the tool life.

  (G) As the hydrocarbyl ether of the polyhydric alcohol, one obtained by converting a part or all of the hydroxyl groups of the polyhydric alcohol into a hydrocarbyl ether can be used. From the viewpoint of improving processing efficiency and tool life, a product obtained by hydrocarbyl etherifying a part of hydroxyl groups of a polyhydric alcohol (partially etherified product) is preferable. Here, the hydrocarbyl group is an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 2 to 24 carbon atoms, a cycloalkyl group having 5 to 7 carbon atoms, an alkylcycloalkyl group having 6 to 11 carbon atoms, carbon A hydrocarbon group having 1 to 24 carbon atoms such as an aryl group having 6 to 10 carbon atoms, an alkylaryl group having 7 to 18 carbon atoms, and an arylalkyl group having 7 to 18 carbon atoms is represented.

  Among these hydrocarbyl groups, a linear or branched alkyl group having 2 to 18 carbon atoms or a linear or branched alkenyl group having 2 to 18 carbon atoms is preferable from the viewpoint of improving the processing efficiency and tool life. A linear or branched alkyl group having 3 to 12 carbon atoms and an oleyl group (residue obtained by removing a hydroxyl group from oleyl alcohol) are more preferable.

  (H) Monoamine is preferably used as the amine. The carbon number of the monoamine is preferably 6 to 24, more preferably 12 to 24. The carbon number here means the total number of carbon atoms contained in the monoamine. When the monoamine has two or more hydrocarbon groups, it represents the total number of carbon atoms.

  As the monoamine used in the present invention, any of a primary monoamine, a secondary monoamine, and a tertiary monoamine can be used, but a primary monoamine is preferable from the viewpoint of improving processing efficiency and tool life. .

  As the hydrocarbon group bonded to the nitrogen atom of the monoamine, any of an alkyl group, alkenyl group, cycloalkyl group, alkylcycloalkyl group, aryl group, alkylaryl group, arylalkyl group, etc. can be used. From the viewpoint of improving efficiency and tool life, an alkyl group or an alkenyl group is preferable. The alkyl group and alkenyl group may be linear or branched, but are preferably linear from the viewpoint of improving processing efficiency and tool life.

  Preferable monoamines used in the present invention include, for example, hexylamine (including all isomers), heptylamine (including all isomers), octylamine (including all isomers), nonylamine (all ), Decylamine (including all isomers), undecylamine (including all isomers), dodecylamine (including all isomers), tridecylamine (including all isomers) ), Tetradecylamine (including all isomers), pentadecylamine (including all isomers), hexadecylamine (including all isomers), heptadecylamine (including all isomers), Octadecylamine (including all isomers), nonadecylamine (including all isomers), icosylamine (including all isomers), heicosylamine (Including all isomers), docosylamine (including all isomers), tricosylamine (including all isomers), tetracosylamine (including all isomers), octadecenylamine (all (Including isomers) (including oleylamine and the like) and mixtures of two or more thereof. Among these, from the viewpoint of improvement in machining efficiency and tool life, primary monoamines having 12 to 24 carbon atoms are preferable, primary monoamines having 14 to 20 carbon atoms are more preferable, and primary monoamines having 16 to 18 carbon atoms are preferable. Grade monoamines are more preferred.

  In this invention, only 1 type chosen from the said oil-based agent (A)-(H) may be used, and 2 or more types of mixtures may be used. Among these, it is preferable that it is 1 type, or 2 or more types of mixtures chosen from (A) carboxylic acid and (H) amine from the point of an improvement of processing efficiency and a tool life.

  The content of the oily agent is not particularly limited, but is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, based on the total amount of the oily agent composition, from the viewpoint of improving processing efficiency and tool life. More preferably, it is 0.1 mass% or more. From the viewpoint of stability, the content of the oily agent is preferably 15% by mass or less, more preferably 10% by mass or less, and further preferably 5% by mass or less, based on the total amount of the oily agent composition.

  Moreover, it is preferable that the oil agent for aluminum processing of this invention further contains an extreme pressure agent. Preferred extreme pressure agents include sulfur compounds and phosphorus compounds.

  The sulfur compound is not particularly limited as long as it does not impair the properties as an aluminum processing oil, but dihydrocarbyl polysulfide, sulfide ester, sulfide mineral oil, zinc dithiophosphate, zinc dithiocarbamate, molybdenum dithiocarbamate and dithiocarbamine. Molybdate acid is preferably used.

The dihydrocarbyl polysulfide is a sulfur compound generally called polysulfide or sulfurized olefin, and specifically means a compound represented by the following general formula (5).
_{^{R 8 -S h -R 9 (5}} )
[In Formula (5), R ⁸ and R ⁹ may be the same or different, and each has a linear or branched alkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or a carbon number. It represents a 7-20 alkylaryl group or a C7-20 arylalkyl group, and h represents an integer of 2-6, preferably 2-5. ]

R ⁸ and R ⁹ in the general formula (5) are each a branched alkyl group having 3 to 18 carbon atoms derived from ethylene or propylene, from the viewpoint of improving the processing efficiency and tool life. More preferred is a branched alkyl group having 6 to 15 carbon atoms derived from ethylene or propylene.

  Specific examples of the sulfurized ester include animal and vegetable fats and oils such as beef tallow, pork tallow, fish fat, rapeseed oil and soybean oil; unsaturated fatty acids (oleic acid, linoleic acid, fatty acids extracted from the above-mentioned animal and vegetable fats and the like, etc. ) And various alcohols, and unsaturated fatty acid esters obtained by reacting them with alcohols; and those obtained by sulfiding a mixture thereof by any method.

  Sulfided mineral oil refers to one obtained by dissolving elemental sulfur in mineral oil. Here, the mineral oil is not particularly limited, and specifically, a lubricating oil fraction obtained by subjecting crude oil to atmospheric distillation and vacuum distillation is subjected to solvent removal, solvent extraction, hydrocracking, solvent dewaxing, Examples thereof include paraffinic mineral oils and naphthenic mineral oils that are refined by appropriately combining one or more purification treatments such as catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment. In addition, as the elemental sulfur, any form such as a lump, powder, molten liquid, etc. may be used, but when powdered or molten liquid elemental sulfur is used, it is efficiently dissolved in the base oil. Is preferable. In addition, molten liquid elemental sulfur has the advantage that the melting operation can be performed in a very short time because the liquids are mixed together, but it must be handled above the melting point of elemental sulfur, heating equipment, etc. It is not always easy to handle because it requires special equipment and is handled in a high temperature atmosphere. On the other hand, powdery simple sulfur is particularly preferable because it is inexpensive and easy to handle and the time required for dissolution is sufficiently short. Moreover, although there is no restriction | limiting in particular in sulfur content in a sulfide mineral oil, Preferably it is 0.05-1.0 mass% normally on the basis of the sulfide mineral oil whole quantity, More preferably, it is 0.1-0.5 mass%. is there.

  The zinc dithiophosphate compound, the zinc dithiocarbamate compound, the molybdenum dithiophosphate and the molybdenum dithiocarbamate mean compounds represented by the following general formulas (6) to (9), respectively.

In the formulas (6) to (9), R ¹⁰ , R ¹¹ , R ¹² , R ¹³ , R ¹⁴ , R ¹⁵ , R ¹⁶ , R ¹⁷ , R ¹⁸ , R ¹⁹ , R ²⁰ , R ²¹ , R ²² , R ²³ , R ²⁴ and R ²⁵ may be the same or different and each represents a hydrocarbon group having 1 or more carbon atoms, X ¹ and X ² each represents an oxygen atom or a sulfur atom, and each X ¹ and each X ² May be the same or different.

  In the present invention, among the above sulfur compounds, it is preferable to use at least one selected from the group consisting of dihydrocarbyl polysulfide and sulfurized ester because the effect of improving machining efficiency and tool life can be achieved at a higher level. .

  Although the content of the sulfur compound is arbitrary, it is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, more preferably 0.05% by mass or more, based on the total amount of the oil agent composition, from the viewpoint of improvement in processing efficiency and tool life. Preferably it is 0.1 mass% or more. Further, from the viewpoint of preventing abnormal wear, the content of the sulfur compound is preferably 50% by mass or less, more preferably 40% by mass or less, still more preferably 30% by mass or less, particularly preferably, based on the total amount of the oil composition. It is 20 mass% or less.

  Specific examples of phosphorus compounds used as extreme pressure agents in the present invention include phosphoric acid esters, acidic phosphoric acid esters, amine salts of acidic phosphoric acid esters, chlorinated phosphoric acid esters, phosphorous acid esters, and phosphors. Examples include thionate. Examples of these phosphorus compounds include esters of phosphoric acid, phosphorous acid or thiophosphoric acid and alkanols, polyether type alcohols, or derivatives thereof.

  In the present invention, among the above phosphorus compounds, phosphoric acid esters, acidic phosphoric acid esters, and amine salts of acidic phosphoric acid esters are preferable from the viewpoint of improving machining efficiency and tool life.

  Further, as described later, the aluminum processing oil composition of the present invention can be suitably used as an oil for lubricating other lubricating parts of machine tools used for metal processing. When the oil composition is used as a sliding surface oil, it is preferable to use an acidic phosphate ester or an amine salt of an acidic phosphate ester. Moreover, when using the oil agent composition of this invention as a hydraulic fluid, it is preferable to use phosphate ester. Furthermore, when used as a dual-use oil for sliding surface oil and hydraulic fluid, use at least one selected from acidic phosphate esters and amine salts of acidic phosphate esters in combination with phosphate esters. Is preferred.

  The aluminum processing oil composition of the present invention may contain only one of a sulfur compound and a phosphorus compound as an extreme pressure agent, or may contain both a sulfur compound and a phosphorus compound. . However, from the viewpoint of improving machining efficiency and tool life, it is preferable to contain a phosphorus compound, or both a sulfur compound and a phosphorus compound, and more preferably to contain both a sulfur compound and a phosphorus compound.

  Although the content of the extreme pressure agent is arbitrary, it is preferably 0.005% by mass or more and 0.01% by mass or more based on the total amount of the oil composition from the viewpoint of improving the processing efficiency and tool life. More preferably, it is more preferably 0.05% by mass or more. From the viewpoint of preventing abnormal wear, the content of the phosphorus compound is preferably 15% by mass or less, more preferably 10% by mass or less, and more preferably 5% by mass or less, based on the total amount of the oil composition. Even more preferably.

  In the present invention, only one of the above-mentioned oily agent or extreme pressure agent may be used, but the oily agent and extreme pressure agent are used in combination since the effect of improving the processing efficiency and tool life can be achieved at a higher level. It is preferable to do.

  The oil processing composition for aluminum processing of the present invention preferably further contains an antioxidant. Antioxidants that can be used include phenolic antioxidants, amine-based antioxidants, zinc dithiophosphate antioxidants, and those used as food additives.

  As the phenol-based antioxidant, any phenol-based compound used as an antioxidant for lubricating oils can be used, and is not particularly limited. For example, an alkylphenol compound is preferable.

  As the amine-based antioxidant, any amine-based compound used as an antioxidant for lubricating oils can be used, and is not particularly limited. For example, phenyl-α-naphthylamine, Np-alkyl Preferred examples include phenyl-α-naphthylamine and p, p′-dialkyldiphenylamine, and specifically include 4-butyl-4′-octyldiphenylamine, phenyl-α-naphthylamine, octylphenyl-α-naphthylamine, dodecylphenyl. -Α-naphthylamine and mixtures thereof.

  Specific examples of the zinc dithiophosphate antioxidant include zinc dithiophosphate represented by the following general formula (18).

[In the formula (18), R ⁵¹ , R ⁵² , R ⁵³ and R ⁵⁴ may be the same or different and each represents a hydrocarbon group. ]

  Antioxidants used as food additives partially overlap with the above-mentioned phenolic antioxidants. For example, 2,6-di-tert-butyl-p-cresol (DBPC), 4,4 '-Methylenebis (2,6-di-tert-butylphenol), 4,4'-bis (2,6-di-tert-butylphenol), 4,4'-thiobis (6-tert-butyl-o-cresol) , Ascorbic acid (vitamin C), fatty acid ester of ascorbic acid, tocopherol (vitamin E), 3,5-di-tert-butyl-4-hydroxyanisole, 2-tert-butyl-4-hydroxyanisole, 3-tert- Butyl-4-hydroxyanisole, 1,2-dihydro-6-ethoxy-2,2,4-trimethylquinoline (ethoxyquin), 2- (1,1-dimethyl) Benzenediol (TBHQ), can be mentioned 2,4,5-hydroxybutyronitrile phenone (THBP).

  Among these antioxidants, those used as phenolic antioxidants, amine antioxidants, and food additives are preferred. Furthermore, when importance is attached to biodegradability, what is used as the said food additive is more preferable, and among them, ascorbic acid (vitamin C), fatty acid ester of ascorbic acid, tocopherol (vitamin E), 2,6- Di-tert-butyl-p-cresol (DBPC), 3,5-di-tert-butyl-4-hydroxyanisole, 2-tert-butyl-4-hydroxyanisole, 3-tert-butyl-4-hydroxyanisole, 1,2-dihydro-6-ethoxy-2,2,4-trimethylquinoline (ethoxyquin), 2- (1,1-dimethyl) -1,4-benzenediol (TBHQ), or 2,4,5-tri Hydroxybutyrophenone (THBP) is preferred, ascorbic acid (vitamin C), fatty acid ester of ascorbic acid, tocopherol Vitamin E), 2,6-di -tert- butyl -p- cresol (DBPC), or 3,5-di -tert- butyl-4-hydroxyanisole are more preferred.

  Although there is no restriction | limiting in particular in content of antioxidant, In order to maintain favorable heat | fever and oxidation stability, its content is preferable 0.01 mass% or more on the basis of the amount of total composition of oil agent, More preferably, it is 0.00. 05% by mass or more, most preferably 0.1% by mass or more. On the other hand, since the improvement in the effect cannot be expected even if more are added, the content is preferably 10% by mass or less, more preferably 5% by mass or less, and most preferably 3% by mass or less.

  The oil processing composition for aluminum processing of the present invention can contain conventionally known additives other than those described above. Examples of such additives include extreme pressure additives other than the phosphorus compounds and sulfur compounds described above (including chlorine extreme pressure agents); wetting agents such as diethylene glycol monoalkyl ether; acrylic polymers, paraffin wax, microwax, slack Film forming agents such as wax and polyolefin wax; water displacement agents such as fatty acid amine salts; solid lubricants such as graphite, graphite fluoride, molybdenum disulfide, boron nitride, polyethylene powder; amines, alkanolamines, amides, carboxylic acids, Corrosion inhibitors such as carboxylates, sulfonates, phosphoric acid, phosphates, partial esters of polyhydric alcohols; metal deactivators such as benzotriazoles and thiadiazoles; quenching of methylsilicones, fluorosilicones, polyacrylates, etc. Foaming agent; alkenyl succinimide, benzy Amine, ashless dispersants such as polyalkenyl amines polyaminoamide; and the like. The content when these known additives are used in combination is not particularly limited, but is added in such an amount that the total content of these known additives is 0.1 to 10% by mass based on the total amount of the composition. It is common.

The kinematic viscosity of the oil processing composition for aluminum processing of the present invention is not particularly limited, but the kinematic viscosity at 40 ° C. is preferably 200 mm ² / s or less from the viewpoint of easy supply to the processed part, and 100 mm ² / S or less is more preferable, 75 mm ² / s or less is further preferable, and 50 mm ² / s or less is particularly preferable. Further, from the viewpoint of improving the processing efficiency and the tool life, the kinematic viscosity at 40 ° C. is preferably 1 mm ² / s or more, more preferably 3 mm ² / s or more, and 5 mm ² / s or more. More preferably.

  Hereinafter, the present invention will be described more specifically based on Examples and Comparative Examples shown in Table 1, but the present invention is not limited to the following Examples.

[Examples 1-9, Comparative Examples 1-6]
Using the base oils a to c, alcohols A to C, and additives A to E shown below, an oil composition for aluminum processing of sample oil 1 to sample oil 14 was prepared.

(1) Base oil Base oil a: Mineral oil (kinematic viscosity at 40 ° C. 32 mm ² / s)
Base oil b: Triolate of trimethylolpropane Base oil c: Poly α-olefin (kinematic viscosity at 40 ° C. 30 mm ² / s)
(2) Alcohol Alcohol A: Branched tridecanol Alcohol B: 1,8-octanediol Alcohol C: Neopentyl glycol monooleate (3) Additive Additive A: Tricresyl phosphate Additive B: Sulfurized ester Additive C : Glycerol monooleate Additive D: Butyl stearate Additive E: Oleic acid (4) Sample oil Sample oil 1: Base oil a (75 mass%), Alcohol A (25 mass%)
Sample oil 2: base oil b (75% by mass), alcohol A (25% by mass)
Sample oil 3: base oil a (73 mass%), alcohol A (25 mass%), additive A (1 mass%), additive B (1 mass%)
Sample oil 4: base oil a (75% by mass), alcohol B (25% by mass)
Sample oil 5: base oil a (75% by mass), alcohol C (25% by mass)
Sample oil 6: base oil b (20% by mass), alcohol A (80% by mass)
Sample oil 7: base oil b (2% by mass), alcohol A (98% by mass)
Sample oil 8: base oil c (75% by mass), alcohol A (25% by mass)
Sample oil 9: base oil a (84% by mass), alcohol A (16% by mass)
Sample oil 10: base oil a (90% by mass), alcohol A (10% by mass)
Sample oil 11: base oil a (75% by mass), additive C (25% by mass)
Sample oil 12: base oil a (73% by mass), additive D (25% by mass), additive A (1% by mass), additive B (1% by mass)
Sample oil 13: base oil a (2% by mass), additive D (98% by mass)
Sample oil 14: base oil a (75% by mass), additive E (25% by mass)

  Next, the following evaluation tests were carried out using the oil processing compositions for aluminum processing of Examples 1 to 9 and Comparative Examples 1 to 5.

(Tapping test)
About the oil processing composition for aluminum processing of Examples 1-9 and Comparative Examples 1-5, diisodecyl adipate was used as a comparative standard oil, and processing performance was evaluated. Specifically, a tapping test was performed under the conditions shown below by alternately using the oil agent compositions of Examples 1 to 9 or Comparative Examples 1 to 5 and diisodecyl adipate. In Comparative Example 6, a similar tapping test was performed by spraying only compressed air without using an oil agent.

-Work material: AC8A
・ Tool diameter: 8mm
・ Tap pitch: 1.25mm
-Tap rake angle: 1.5 degrees-Tap biting angle: 10 degrees-Tap pilot hole diameter: 7.4 mm
・ Rotation speed: 360rpm
Standard oil: DIDA (diisodecyl adipate)
-Supply method: TACO Co., Ltd. MQ4 sprayed to the processing point.
・ Oil agent supply amount: 15 ml / hour
・ Conveying air pressure: 0.45 MPa

The tapping energy in the above test was measured, and the tapping energy efficiency (%) was calculated using the following formula.
Tapping energy efficiency (%) = (tapping energy when using comparative standard oil) / (tapping energy when using oil composition)
The obtained results are shown in Table 1. In the table, the higher the value of tapping energy efficiency, the higher the lubricity.

(Abrasion resistance evaluation test)
In order to evaluate the performance against tool wear, the tapping energy efficiency with respect to the standard oil after processing 10 holes and 150 holes under the following conditions for the aluminum processing oil compositions of Examples 1-9 and Comparative Examples 1-5. Measurements were made to determine the rate of decrease of the value after 150 holes with respect to 10 holes. The degree of decrease in tapping energy efficiency with the number of machining was judged to be due to tool wear. In addition, the test was performed by removing aluminum adhering to the tool every 10 holes with a 10% sodium hydroxide solution.
-Work material: AC8A
・ Tool diameter: 8mm
・ Tap pitch: 1.25mm
-Tap rake angle: 1.5 degrees-Tap biting angle: 10 degrees-Tap pilot hole diameter: 7.4 mm
・ Rotation speed: 360rpm
・ Number of processing: 10, 150 holes ・ Standard oil: DIDA (diisodecyl adipate)
-Supply method: Injection to a processing point (DIDA) without using carrier air. Injected into the processing point along with carrier air (sample oil) at TACO MQ4.
Oil supply amount: 4.0 ml / min (DIDA), 15 ml / hour (sample oil)
・ Conveying air pressure: 0.4 MPa

(Discoloration evaluation test)
Two aluminum plates A-1050 (60 mm × 80 mm × 1.2 mm) defined in JIS H 4000 are prepared, 0.1 g of oil agent is dropped on one sheet, and the oil agent is sandwiched between another aluminum plate. A load of 100 g is applied from above, and the mixture is allowed to stand for 100 hours at 50 ° C. and 95% humidity. Thereafter, the surface sandwiching the oil was observed to confirm the presence or absence of discoloration.
The same evaluation was performed using a cold rolled steel plate SPCC panel (60 mm × 80 mm × 1.2 mm) defined in JIS G 3141.

  From Table 1, it can be seen that the oil processing composition for aluminum processing of the present invention has high tapping energy efficiency, excellent lubricity, a low rate of decrease in tapping energy efficiency, and excellent wear resistance. Furthermore, it turns out that there is no discoloration with respect to aluminum.

The aluminum processing oil composition of the present invention can be suitably used for aluminum processing such as cutting, grinding, rolling, forging, pressing, drawing, and rolling. Among these uses, it is very useful as an oil used for cutting, grinding, or rolling. The supply method to the processing part of the aluminum processing oil composition of the present invention is a trace amount oil supply type, and the aluminum processing oil composition of the present invention is particularly suitable as a trace amount oil supply type cutting and grinding oil. It is.
The aluminum processing oil composition of the present invention can also be used as a lubricating oil for bearing parts, hydraulic equipment, and gear parts, and the lubricating oil in each of these parts is used as a common oil. be able to.

Claims (2)

Mineral oil is contained in an amount of 5% by mass to 84% by mass based on the total amount of the composition, and an alcohol compound having 1 to 8 hydroxyl groups and 2 to 27 carbon atoms is contained in an amount of 16% by mass to 95% by mass based on the total amount of the composition. And the alcohol compound is a linear or branched alcohol having 3 to 18 carbon atoms, a cycloalkyl alcohol or alkylcycloalkyl alcohol having 5 to 10 carbon atoms, or a partial ester of a dihydric alcohol. An oil composition for processing aluminum with a very small amount of oil.
A method for cutting and grinding aluminum by an ultrafine oil supply method using the aluminum processing oil composition according to claim 1 as an oil.