WO2006101019A1

WO2006101019A1 - Lubricating oil composition for metal working

Info

Publication number: WO2006101019A1
Application number: PCT/JP2006/305327
Authority: WO
Inventors: Hiroshi Kametsuka; Satoshi Suda; Junichi Shibata; Tsunetoshi Sugawara
Original assignee: Nippon Oil Corporation
Priority date: 2005-03-23
Filing date: 2006-03-13
Publication date: 2006-09-28
Also published as: JP5071999B2; JP2006299220A

Abstract

A lubricating oil composition for metal working which withstands high production efficiency and has high suitability for working even under severe lubricating conditions. It on the other hand retains satisfactory oil removability and inhibits the working atmosphere or product quality from deteriorating. It causes no increase in oil cost. The lubricating oil composition for metal working comprises a mineral oil, synthetic oil, or fat and an epoxy compound incorporated therein.

Description

Lubricating oil composition for metal working

[Technical field]

The present invention relates to a lubricating oil composition for metal processing used in various processing of various metals. Metals to which the lubricating oil composition for metal working of the present invention is applied include aluminum, magnesium and alloys thereof, transition metals such as copper, iron, chromium, nickel, zinc, tin, titanium, and light metals. Mention may be made of alloys. Applicable processing methods include cold, warm and hot rolling, pressing, stamping, and ladder.

Metal processing such as cutting, grinding, drawing, drawing, drawing, forging, micro-cutting (MQ L), and the like. In particular, processing of aluminum fins (flat pure aluminum (purity 99% or higher) or alloys based on aluminum), high purity aluminum (purity 99.9% or higher (99.99% or higher) Are suitable for cold, warm and hot rolling of alloys containing aluminum as the main component, or metals other than aluminum and alloys containing them as the main component. In the present invention, unless otherwise specified, the term “aluminum” hereinafter refers to pure aluminum (including high-purity aluminum) and alloys containing aluminum as a main component.

[Background]

Aluminum fins used in heat exchangers for refrigerators and air conditioners and other refrigeration systems are manufactured by performing plastic processing such as overhanging, drawing, punching, curling, ironing, etc., on aluminum fin materials. . Processing of these aluminum fin materials is usually performed using a processing oil, and an oily agent such as fatty acid, fatty acid ester, high-grade alcohol, α-age refin is added to a synthetic hydrocarbon such as mineral oil or isoparaffin. Processing oil is used (see, for example, Patent Document 1). However, with these processing fluids, sufficient lubricity cannot be obtained, and aluminum may adhere to the punch or damage to the surface of the material may be observed. Increasing the amount of additive added to solve these problems will result in incomplete removal of the oil by heat. In addition to causing appearance problems such as discoloration, the odor increases and the working environment is deteriorated, and the performance as fins such as water leakage is hindered, and the cost of the oil agent increases.

In rolling aluminum and other metals, higher alcohols, fatty acid esters, fatty acids, alkylene glycol esters, α-olefins, and the like are conventionally used as oiling agents for rolling oils. Higher alcohols and then fatty acid esters are generally used. (For example, see Patent Documents 2 to 3). However, in order to improve productivity, it was necessary to roll the metal at a higher speed and with a higher reduction ratio, and the lubricated part was exposed to higher temperatures. In addition, rolling of high-purity materials, which are commonly called nine-nine, three-nine, and four-nine, with a purity of 99%, 99.9%, and 99.99%, causes significant adhesion and lubricity. Or a large amount of wear powder is generated, impeding productivity. For this reason, a sufficient rolling limit cannot be obtained with the addition of a conventionally known oily agent, and measures are taken to increase the amount of oily agent added or to roll at a reduced rolling speed or rolling reduction. However, by increasing the oil-based agent, the removal of the oil agent due to heat becomes incomplete and stains are likely to occur during annealing, as well as slippage between work rolls and rolled material, uneven gloss on the surface of the plate after rolling, and wear powder. Problems such as a decrease in plate quality, such as an increase in volume, a deterioration of the working environment due to an increase in the odor of the oil, and an increase in rolling costs arise. On the other hand, lowering the rolling speed and rolling reduction is not preferable because productivity decreases.

(1) Patent Document 1: JP-A-2-133495

(2) Patent Document 2: 2003-1 65993

(3) Patent Document 3: 2003-1 65994

[Disclosure of the Invention]

The present invention has been made in view of such circumstances, and its purpose is to withstand high productivity and high workability even under harsh lubrication conditions, while maintaining good oil agent removal performance. It is intended to provide a lubricating oil composition for metal working that does not cause deterioration of the product, suppresses deterioration in product quality, and does not increase oil cost.

As a result of intensive studies to solve the above problems, the present inventors use a high-performance metalworking lubricant in which an epoxy compound is blended with mineral oil, synthetic oil, or oil. It can withstand high speeds and high processing rates, and it has good oil removal properties, so there are few stains and discoloration after oil removal, and it does not deteriorate the working environment such as odor and rough skin. The inventors have found that it is possible to suppress the decrease and to suppress the increase in the oil agent cost, and have completed the present invention. In particular, with regard to product quality, when aluminum-umfin processing is used, lubricity is good, so aluminum adhesion to the punch, damage to the surface to be processed, and increase in the amount of wear powder are suppressed. It was found that the uneven brightness and the amount of wear powder were suppressed.

That is, the lubricating oil composition for metal processing of the present invention is characterized by containing an epoxy compound in one or more base oils selected from mineral oil, synthetic oil, and fats and oils. Hereinafter, the present invention will be described in detail.

As the base oil of the present invention, any of mineral oil, synthetic oil and fat can be used, and the kind thereof is not limited, but mineral oil or synthetic oil is particularly preferable.

Examples of mineral oil that can be used in the present invention include, for example, a kerosene fraction obtained by distillation of a paraffinic or naphthenic crude oil; a normal paraffin obtained by an extraction operation from the kerosene fraction; and a paraffinic or naphthenic oil. The lubricating oil fraction obtained by distilling the crude oil from the system is subjected to solvent purification, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment. One purified in combination of two or more may be mentioned.

The aromatic content in mineral oil is not particularly limited, but if the work environment is important, it is preferably 25% by volume or less, more preferably 15% by volume or less, and even more preferably 10% by volume or less. More preferably, it is 8% by volume or less, more preferably 5% by volume or less, still more preferably 2% by volume or less, and most preferably 1% by volume or less. Here, the aromatic content means a value measured in accordance with the fluorescent indicator adsorption method of JISK 2 5 3 6 “Petroleum product 1 hydrocarbon type test”. In particular, in the processing of aluminum fins, aromatic content is preferably and this is 5 volume ^_0/0 or less, more preferably 3 volume% or less, more preferably 2 volume% or less, most preferably less than 1% by volume is there. By setting the aromatic content to 5% by volume or less, odor and rough skin can be prevented. In the rolling of aluminum, the aromatic content is 10% by volume or less, preferably 8% by volume or less, more preferably 6% by volume or less, Even more preferred is 4% by volume or less, even more preferred is 3% by volume or less, and most preferred is 2% by volume or less.

The naphthene content is not particularly limited, but it is preferably 10% by volume or more, more preferably 15% by volume or more, more preferably 20% by volume or more, and even more preferably 25% by volume or more, most preferably Preferably it is at least 30% by volume. By setting the naphthene content to 10% by volume or more, the oil agent removability and processability in the oil agent removing process are improved. On the other hand, the naphthene content is preferably 90% by volume or less, more preferably 80% by volume or less, further preferably 75% by volume or less, and most preferably 70% by volume or less. By setting the naphthene content to 90% by volume or less, volatilization of the oil agent at room temperature can be prevented.

Further, the paraffin content in the mineral oil is preferably 5% by volume or more, and more preferably 10% by volume. Or more, more preferably 20% by volume or more. By making the paraffin content 5% by volume or more, the odor of the oil can be prevented. On the other hand, the paraffin content is preferably 90% by volume or less, more preferably 80% by volume or less, and still more preferably 70% by volume or less. By making the paraffin content 90% by volume or less, it is possible to improve the effect of preventing adhesion during processing. In the present invention, the naphthene content and the paraffin content are determined by the molecular ionic strength obtained by mass spectrometry by FI ionization (using a glass reservoir). The measurement method is specifically shown below.

(1) Nominal diameter 74 to 149 m silica gel activated by drying for 3 hours at approximately 1 75 ° C on an elution chromatographic adsorption tube with a diameter of 18 mm and a length of 980 mm (Fuji Silicon Chemical Co., Ltd.) Made grade 923) 1 20 g is filled.

(2) Inject 75 ml of n-pentane and pre-wet the silica gel.

(3) Weigh accurately about 2 g of the sample, dilute with an equal volume of η-pentane, and inject the resulting sample solution.

(4) When the liquid level of the sample solution reaches the top of the silica gel, inject 140 ml of n-pentane to separate the saturated hydrocarbon components, and collect the eluate from the bottom of the adsorption tube.

(5) Evaporate the eluate through a rotary evaporator to distill off the solvent, and use saturated hydrocarbons. Get the ingredients.

(6) Type analysis of saturated hydrocarbon components using a mass spectrometer. As an ionization method in mass spectrometry, an FI ionization method using a glass reservoir is used, and a JMS-AX 505H manufactured by JEOL Ltd. is used as a mass spectrometer. The measurement conditions are shown below.

Accelerating voltage: 3.0 kV, force source voltage: — 5 6 kV, resolution: approx. 500, emitter: carbon, emitter current: 5 mA, measuring range: mass number 35 to 70 0, auxiliary oven temperature: 300 ° C, separator temperature: 300 ° C, main oven temperature: 350 ° C, sample injection volume: 1 1

The molecular ions obtained by mass spectrometry, after isotope correction, are calculated based on the mass number of paraffins (C _n H _{2n + 2} ) and naphthenes (C _n H _2n , C _n H _2n — ₂ , C _n H _2n — ₄ · · ·)) 2 types are classified and arranged, the fraction of each ionic strength is obtained, and the content of each type for the entire saturated hydrocarbon component is determined. Next, based on the content of saturated hydrocarbon components, the content of paraffin and naphthene for the entire sample is determined. Details of data processing by type analysis of FI mass spectrometry are described in the section “2.2.3 Data processing” on page 33 to No. 4 1 35 to 1 42 of “Nisseki Review”. Has been. The initial boiling point of the mineral oil is preferably 150 ° C or higher, more preferably 155 ° C or higher, and further preferably 160 ° C or higher. By setting the initial boiling point of mineral oil to 150 ° C or higher, volatilization of the oil at room temperature can be sufficiently prevented. On the other hand, the end point of the mineral oil is preferably 350 ° C or lower, more preferably 340 ° C or lower, and further preferably 330 ° C or lower. By making the end point of the mineral oil 350 ° C or less, the oil agent removability in the oil agent removing step can be improved. The temperature difference between the initial boiling point and end point of the mineral oil is preferably 100 ° C or less, more preferably 90 ° C or less, and further preferably 80 ° C or less. By setting the temperature difference to 100 ° C. or less, it is possible to achieve both prevention of volatilization of the oil agent at room temperature and oil agent removability in the oil agent removing step. Here, the initial boiling point and the end point mean values measured in accordance with JISK 2254 “Petroleum product one distillation test method”. Examples of synthetic oils that can be used in the present invention include olefin oligomers (propylene oligomers, isobutylene oligomers, polybutenes, 1-octene oligomers, 1-decene oligomers, ethylene monopropylene oligomers, etc.) or their hydrides. Alkylbenzene, alkylnaphthalene, diester (ditridecyl glutarate, di-2-ethylhexyl adipate, disodecyl adipate, ditridecyl adipate, di-2-ethylhexyl sebacate) Propaneperanolate, pentaerythritol 2-ethyl hexanoate, pentaerythritol pelargonate, etc.), polyglycol, silicone oil, dial Rujifueniru ether, and Porifue - ether, and the like. Among these, propylene oligomer hydride, isobutylene oligomer hydride and polybutene hydride are collectively called isoparaffin.

Examples of the fats and oils that can be used in the present invention include beef tallow, pork tallow, 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. . Mineral oil or isoparaffin is preferred as the base oil of the aluminum fin processing oil, and isoparaffin is more preferred from the viewpoint of good drying properties and low odor. As the base oil of rolling oil, mineral oil, synthetic oil, it can be used either oil, the base oil of the aluminum rolling oil aromatic content of 1 0% by volume or less, Nafute emissions minute 20-90 volume ^_0/0 , more preferably paraffins 5-80% by volume of mineral oil, the base oil of the rolling oil of the metal other than § Ruminiumu, aromatic content 25% by volume or less, naphthoquinone Ten min 1 0-80 volume ^_0/0, paraffins 10-90% by volume mineral oil is more preferred. Kinematic viscosity at 40 ° C of the base oil is, 1. 0-500 mM ² Roh s, preferably in the range of 1. 2 to 400 mm ² / s, more preferably 1. 4~3 5 OmmV s. If the viscosity is too low, the lubricity may be reduced, and if it is too high, there may be a problem in supplying the oil to the processed part.

However, the optimum viscosity of the base oil depends on the purpose of use, and in aluminum fin processing, the kinematic viscosity at 40 ° C is 1.2 to 5.0 mm ² Z s, preferably 1.3 to 4.8 mm ² / s. More preferably, it is in the range of 1.4 to 4.7 mm ² s. Base If the kinematic viscosity (40 ° C) of the oil is too low, sufficient lubricity may not be obtained, and the volatility may increase the risk of fire and other fires. If it is too high, there may be a problem in the supply of the oil to the processing section, and the oil agent removability in the oil agent removal process may deteriorate and discoloration may occur.

The optimal kinematic viscosity at 40 ° C for aluminum rolling is 1.0 to 10 mm ² μm, preferably 1.2 to 8.0 mm ² / s, more preferably 1.4 to 6.0 mm ² / s. It is a range. The optimal kinematic viscosity at 40 ° C for rolling of metals other than aluminum is 2.0 to 3 Omm ² / s, preferably ^{2.5 to} 20 mm ² Z s, more preferably 3.0 to 15 5 mm ² Z. The range of s. If the kinematic viscosity (40 ° C) of the base oil is too low, sufficient lubricity may not be obtained, and the volatility may increase the risk of fire and other fires. On the other hand, if it is too high, there may be a problem in the supply of the oil to the processing part, and since the oil agent removal property is poor, seizure of a lubricating oil component called stin is likely to occur after annealing. Deterioration of surface gloss due to surface damage called oil pitting on the material surface, slippage due to over-lubrication, increase in the amount of wear powder, damage to the surface of the work material, inability to process if the slip is significant, There is a risk of bringing. Examples of the epoxy compound used in the lubricating oil composition for metal working of the present invention include epoxy compounds represented by the following (E-1) to (E-8).

(E-1) Phenyldaricidyl ether type epoxy compound

(E-2) Alkyl glycidyl ether type epoxy compounds

(E-3) Glycidyl ester type epoxy compound

(E-4) Alyloxysilane compounds

(E-5) Alkyloxysilane compounds

(E-6) Alicyclic epoxy compound

(E-7) Epoxidized fatty acid monoester

(E-8) Epoxidized vegetable oil The components (E-1) to (E_8) are described in detail below.

(E-1) Phenyldaricidyl ether type epoxy compounds include Can be exemplified by phenylglycidyl ether or alkylphenylglycidyl ether. As used herein, alkylphenyl daricidyl ether includes one having 1 to 3 alkyl groups having 1 to 13 carbon atoms, and one having one alkyl group having 4 to 10 carbon atoms, for example, , N-butyl phenyl daricidyl ether, i butyl phenethyl glycidyl ether, sec butyl phenyl glycidyl ether, tert butyl phenyl licidino elenotere, pentyl phenyl alicydinole ethenore Xinolephenylidicidinoreethenole, heptylphenylidicidinole etenore, octylpheninoreglycidyl etherenole, noninorefinino glycidyl ether, decylphenylalicydyl ether and the like can be exemplified as preferred examples.

Specific examples of (E-2) alkyl glycidyl ether type epoxy compounds include hexyl glycidyl ether, heptyl daricidyl ether, octyl glycidyl ether, nonyl daricidyl ether, decyl glycidyl ether, undecyl glycidyl ether, Dodecyl glycidyl ether, tridecyl glycidyl ether, tetradecyl glycidyl ether, 2-ethylhexyl glycidyl etherate, neopentinoleglicinoresinglycidinoate ethere, trimethylolpropantriglycidyl ether, pentaerythritol tonorte Traglycidyl ether, 1, 6-hexanediol diglycidyl ether, sorbitol polyglycidyl etherenole, polyanolene glycol cornore monoglycidinoreetherenore Examples thereof include polyanolylene dallicol diglycidyl ether and the like.

Specific examples of the (E-3) glycidyl ester type epoxy compound include compounds represented by the following general formula (1).

R— C— 0— C— C— C

II \ /

o In the above formula (1), R represents a hydrocarbon group having 1 to 18 carbon atoms. Examples of such hydrocarbon groups include alkyl groups having 1 to 18 carbon atoms, alkenyl groups having 2 to 18 carbon atoms, alkyl groups having 5 to 7 carbon atoms, and alkylcyclohexanes having 6 to 18 carbon atoms. An alkyl group, Examples include aryl groups having 6 to 10 carbon atoms, alkylaryl groups having 7 to 18 carbon atoms, and arylalkyl groups having 7 to 18 carbon atoms. Of these, alkyl groups having 5 to 15 carbon atoms, alkenyl groups having 2 to 15 carbon atoms, and phenyl groups having 1 to 4 carbon atoms are preferred. .

Among the glycidyl ester type epoxy compounds, specifically preferred are glycidyl 2,2-dimethyloctanoate, glycidyl benzoate, daricidyl t-butyl benzoate, darisidyl acrylate, daricidyl methacrylate. Etc. can be illustrated.

Specific examples of the (E-4) aryloxysilane compound include 1,2-epoxystyrene, alkyl 1,2,2-epoxystyrene, and the like.

(E-5) Specific examples of the alkyloxysilane compound include 1,2-epoxybutane, 1,2-epoxypentane, 1,2-epoxyhexane, 1,2-epoxyheptane, 1,2- Epoxy octane, 1,2-epoxynonane, 1,2 monoepoxydecane, 1,2_epoxyundecane, 1,2-epoxydodecane, 1,2_epoxytridecane, 1,2_epoxytetradecane, 1, Examples include 2-epoxycipentadecane, 1,2-epoxyhexadecane, 1,2-epoxyheptadecane, 1,2-epoxyoctadecane, 1,2-epoxynonadecane, 1,2-epoxycosane, etc. .

(E-6) As the alicyclic epoxy compound, a compound in which the carbon atoms constituting the epoxy group directly form an alicyclic ring, such as a compound represented by the following general formula (2), is used. Can be mentioned.

Specific examples of the alicyclic epoxy compound include 1,2-epoxycyclohexylene, 1,2_epoxycyclopentane, and 3,4-epoxycyclohexylmethyl. — 3, 4—epoxycyclohexanecarboxylate, bis (3,4-epoxycyclohexylmethyl) adipate, exo-1,3-epoxynorbornane, bis (3,4-epoxy-1-methylcyclohexylenomethyl) adipate, 2— (7-Oxabicyclo [4. 1. 0] hept-3-yl) One Spiro (1, 3--Dioxane _ 5, 3, 1, [7] Oxabicyclo [4. 1. 0] Heptane, 4— ( 1, 1-Methylepoxyethyl) 1,1,2-epoxy-1,2-methylcyclohexane, 4-1-epoxyethyl-1,2-epoxycyclohexane and the like.

(E-7) Specific examples of epoxidized fatty acid monoesters include esters of epoxidized fatty acids having 12 to 20 carbon atoms with alcohols or phenols having 1 to 8 carbon atoms or alkylphenols. it can. In particular, butenole, hexyl, benzenole, cyclohexenole, methoxy chinenole, octyl, phenyl and butylphenyl esters of epoxy stearic acid are preferably used.

(E-8) Specific examples of epoxidized vegetable oils include epoxy compounds of vegetable oils such as soybean oil, linseed oil, and cottonseed oil. In the lubricating oil composition for metal working of the present invention, only one type of the epoxy compound selected from the above (E-1) to (E-8) may be used, or two or more types may be mixed. May be used. '

In the present invention, the epoxy compound is preferably (E-2), (E-3) and (E-5) among (E-1) to (E-8). ) And (E-5) Force S is preferred, and (E-5) is most preferred.

In the lubricating oil composition for metal working of the present invention, the content of the epoxy compound is from 0.01 to: 10.0 mass, preferably from 0.05 to 7.5 mass%, more preferably based on the total amount of the composition. Is 0.1 to 6.0 mass. / ₀ . If the content is less than 0.01% by mass, the lubricity improvement effect may not be expected. If the content is more than 10% by mass, the lubricity improvement effect corresponding to the added amount cannot be expected. Removal may be insufficient, and in the case of rolling oil, lubricity may be hindered or uneven gloss may occur depending on conditions. 5327 Epoxy compounds can be used as a substitute for oil-based agents, and when used in combination with oil-based agents, the amount of oil-based agents used can be reduced, leading to improvements in the work environment such as odor reduction. The lubricating oil composition for metal working of the present invention can further contain an oxygen-containing compound in order to further improve workability. Examples of the oxygen-containing compound include at least one oxygen-containing compound selected from the group consisting of the following components (A 1) to (A8).

(A 1) A polyalcohol-containing alkylene oxide calorie having 3 to 6 hydroxyl groups having a number average molecular weight of from 100 to 1,000

(A 2) Hydrocarbyl ether or Hydrocanolebi nore Estenore of the above (A 1) component

(A3) Polyalkylene dallicol having a number average molecular weight of from 100 to 1,000 (A 4) Hydral carbyl ether or hydrocarbinole esterolate of component (A3) above

(A 5) Dihydric alcohol having 2 to 20 carbon atoms

(A 6) Above component (A5) Hydrocarbyl ether or Hydrocarbinol esterol

(A7) C3-C20 trihydric alcohol

(A 8) Hydrocarbyl ether or Hydrocarbinol esterol of the above (A7) component

The polyhydric alcohol constituting the component (A 1) has 3 to 6 hydroxyl groups. In addition to the following polyhydric alcohols, saccharides can also be used as the polyhydric alcohol having 3 to 6 hydroxyl groups.

Examples of the polyhydric alcohol include glycerin, polyglycerin (a dimer to tetramer of glycerin, such as diglycerin, triglycerin, and tetraglycerin), trimethylol alkane (such as trimethylolethane, trimethylolpropane, and trimethylolbutane). And their dimer to tetramer, pentaerythritol, dipentaerythritol, 1,2,4-butanetriol, 1,3,5-pentanetri All, 1, 2, 6-hexanetriol, 1, 2, 3, 4-butanetetrol, sorbitol, sorbitan, sorbitol glycerin condensate, aditol, arabitol, xylitol, mannitol, idiri tonole, tari tonole , Dulcitol, alitol and the like.

Examples of the saccharide include xylose, arabinose, ribose, rhamnose, dalcoose, f / cose, galactose, mannose, sonolevose, cellobiose, mantose, isomanoletose, trenorose, sucrose, and the like. Among these, glycerin, trimethylol alkane, and sorbitol are preferable because of excellent processability.

In addition, as the alkylene oxide constituting the component (A 1), an alkylene oxide having 2 to 6 carbon atoms, preferably 2 to 4 carbon atoms, is 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 (] 3-butylene oxide), 1,2-epoxy _ 1 _methyl propane, 1,2 _epoxyheptane, 1,2-epoxy hexane and the like. Among these, ethylene oxide, propylene oxide, and butylene oxide are preferable, and ethylene oxide and propylene oxide are more preferable from the viewpoint of excellent processability. ,

When two or more alkylene oxides are used, the polymerization mode of the oxyalkylene group is not particularly limited, and may be random copolymerized or block copolymerized. 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. Among these, it is preferable to add to all hydroxyl groups from the viewpoint of excellent processability.

Further, the number average molecular weight (Μη) of the component (A 1) is from 100 to 1,000, preferably from 100 to 800. If Μη is less than 100, the solubility in mineral oil may be reduced. On the other hand, when Μη is larger than 1 000, there is a risk that the oil agent remains on the surface of the processed material after processing in the oil agent removing step. In the present invention, Μη means the number average molecular weight in terms of standard polystyrene by gel permeation chromatography (GPC).

As the component (A 1), a hydroxyl group is used so that Μη is 100 or more and 1 000 or less. A product obtained by addition reaction of alkylene oxide with 3 to 6 polyhydric alcohols may be used. In addition, a mixture of polyhydric alcohol alkylene oxide adducts having 3 to 6 hydroxyl groups obtained by an arbitrary method or a commercially available alkylene oxide adduct of polyhydric alcohols having 3 to 6 hydroxyl groups. A mixture obtained by distilling the mixture in such a manner that M n is not less than 100 and not more than 100 0 may be used. As the component (A 1), these compounds may be used alone or as a mixture of two or more.

The component (A 2) is an alkylene oxide adduct of a polyhydric alcohol having 3 to 6 hydroxyl groups whose M n is from 100 to 100, preferably from 100 to 80. Hydrocarbyl etherified or esterified.

As the component (A 2), a compound obtained by etherifying or esterifying some or all of the terminal hydroxyl groups of the alkylene oxide adduct of the component (A 1) can be used. The term “hydrocarbyl group” as used herein refers to 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, and an alkylcyclocarbon having 6 to 11 carbon atoms. Represents a hydrocarbon group having 1 to 24 carbon atoms such as an alkyl group, an aryl group having 6 to 10 carbon atoms, an alkylaryl group having 7 to 18 carbon atoms, and an aryl hydrocarbon group having 7 to 18 carbon atoms. .

Examples of the alkyl 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, t-butyl group, linear or branched A 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 Branched hexadecyl group, linear or branched heptadecyl group, linear or branched octadecyl group, linear or branched nonadecyl group, linear or branched icosyl group, linear or branched Hencosyl group, straight chain Or a branched docosyl group, a linear or branched tricosyl group, a linear or branched tetracosyl group, and the like.

Examples of the alkenyl group having 2 to 24 carbon atoms include a bur group, a linear or branched probe. Nyl group, straight or branched butenyl group, straight or branched pentenyl group, straight or branched hexenyl group, straight or branched heptul group, straight or branched octal 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 pentadecyl group, linear or branched hexadecenyl group, linear or branched heptadecenyl group, linear or branched octadecenyl group, linear Or a branched nonadecenyl group, a linear or branched icosenyl group, a linear or branched hencocenyl group, a linear or branched dococenyl group, a linear or branched tricocenyl group, a linear or branched And the like.

Examples of the cycloalkyl group having 5 to 7 carbon atoms include a cyclopentyl group, a cyclohexyl group, and a cycloheptyl group. Examples of the alkylcycloalkyl group having 6 to 11 carbon atoms include methylcyclopentyl group, dimethylcyclopentyl group (including all structural isomers), methylethyl pentyl group (including all structural isomers), and jetyl. Cyclopentyl group (including all structural isomers), methylcyclohexyl group, dimethylcyclohexyl group (including all structural isomers), methylethyloxy hexyl group (including all structural isomers), Jetylcyclohexyl group (including all structural isomers), methylcycloheptyl group, dimethylcycloheptyl group (including all structural isomers), methylethylcycloheptyl group (all structural isomers) ), A butyl group (including all structural isomers) and the like. Examples of aryl groups having 6 to 10 carbon atoms include phenyl groups and naphthyl groups. The alkylaryl group having 7 to 18 carbon atoms includes a trinole group (including all structural isomers), a xylyl group (including all structural isomers), an ethenylphenyl group (including all structural isomers). ), Linear or branched propylphenyl group (including all structural isomers), linear or branched butylphenyl group (including all structural isomers), linear or branched pentyl Phenyl group (including all structural isomers), linear or branched hexylphenyl group (including all structural isomers), linear or branched heptylphenyl group (all structural isomers) ), Straight-chain or branched octylphenyl group (including all structural isomers), straight-chain or branched nonylphenyl group (including all structural isomers), straight-chain or branched Decylphenyl group ( Structural isomers of Te the Including. ), Linear or branched undecylphenyl group (including all structural isomers), and linear or branched dodecylphenyl group (including all structural isomers).

Examples of the arylalkyl group having 7 to 12 carbon atoms include benzyl group, phenylethyl group, phenylpropyl group (including isomer of propyl group), phenylbutyl group (including isomer of butyl group), and phenyl. Rupentyl group (including isomers of pentyl group), phenylhexyl group (including isomers of hexyl group), and the like.

Among these, from the viewpoint of excellent processability, 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, and a carbon number of 3 to A linear or branched alkyl group or an oleyl group (residue obtained by removing a hydroxyl group from oleyl alcohol) is more preferable.

The acid used for esterification usually includes carboxylic acid. The carboxylic acid may be a monobasic acid or a polybasic acid, but a monobasic acid is usually used. Examples of the monobasic acid include fatty acids having 6 to 24 carbon atoms, which may be linear or branched. The monobasic acid may be a saturated fatty acid, an unsaturated fatty acid, or a mixture thereof.

Saturated fatty acids include linear or branched hexanoic acid, linear or branched octoic acid, linear or branched nonanoic acid, linear or branched decanoic acid, linear or branched undecane Acid, linear or branched dodecanoic acid, linear or branched tridecanoic acid, linear or branched tetradecanoic acid, linear or branched pentadecanoic acid, linear or branched hexadecanoic acid, straight Linear or branched hydroxyoctadecanoic acid, linear or branched nonadecanoic acid, linear or branched eicosanoic acid, linear or branched heneicosanoic acid, linear Examples thereof include branched docosanoic acid, linear or branched tricosanoic acid, and linear or branched tetracosanoic acid.

Examples of unsaturated fatty acids include linear or branched hexenoic acid, linear or branched heptenoic acid, linear or branched octenoic acid, linear or branched nonenoic 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 Ktadecenoic acid, linear or branched hydroxytadecenoic acid, linear or branched nonadecenoic acid, linear or branched eicosenoic acid, linear or branched heneicosenoic acid, linear or branched Examples include docosenoic acid, linear or branched tricosenoic acid, and linear or branched tetracosenoic acid.

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. As the component (A 2), these compounds may be used alone or as a mixture of two or more.

The component (A 3) is a polyalkylene glycol having an Mn of 100 to 100 and is obtained by homopolymerizing or copolymerizing alkylene oxide having 2 to 6 carbon atoms, preferably 2 to 4 carbon atoms. Is used. As alkylene oxides having 2 to 6 carbon atoms,

(A 1) The alkylene oxides listed in the description of the component can be mentioned. Of these, ethylene oxide, propylene oxide, and butylene oxide are preferable, and ethylene oxide and propylene oxide are more preferable from the viewpoint of excellent processability.

In addition, when two or more alkylene oxides are used at the time of preparing the polyalkylenedaricol, there is no particular limitation on the polymerization type of the oxyalkylene group, and even if random copolymerization is performed, block copolymerization is performed. Also good.

Further, as the component (A 3), M n is 1 0 0 or more and 1 0 0 or less, preferably 1 2 0 or more and 7 0 0 or less. A polyalkylene glycol having an Mn of less than 100 may reduce the solubility in mineral oil. On the other hand, polyalkylene alcohol which Mn is greater than 100 0 may leave the oil on the surface of the processed material after processing in the oil removal process.

Furthermore, as the component (A 3), a component that has been reacted so that M n is not less than 100 and not more than 100 when the alkylene oxide is polymerized may be used. In addition, a polyalkylene dallicol mixture obtained by an arbitrary method or a commercially available polyalkylene glycol mixture was separated by distillation or chromatography so that Mn was not less than 100 and not more than 100. A thing may be used. As the component (A 3), these compounds may be used alone or as a mixture of two or more. The component (A 4) is a polyalkylene glycol having Mn of 100 or more and 1,000 or less, preferably 120 or more and 700 or less, which is hydrocarbyl etherified or esterified. As the component (A4), it is possible to use a product obtained by etherifying or esterifying some or all of the terminal hydroxyl groups of the polyalkylene glycol of component (A3). The term “hydrocarbyl group” as used herein refers to a hydrocarbon group having 1 to 24 carbon atoms, and specifically includes the groups listed in the description of the component (A2). Among these, from the viewpoint of excellent processability, 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, and the number of carbon atoms is 3 A linear or branched alkyl group of ˜12 or an oleyl group (residue obtained by removing a hydroxyl group from oleyl alcohol) is more preferred.

Further, as the component (A4), those obtained by esterifying the terminal hydroxyl group of the polyalkylene glycol of the component (A3) can also be used. The acid used for esterification usually includes carboxylic acid. The carboxylic acid may be a monobasic acid or a polybasic acid, but a monobasic acid is usually used. Specific examples include those listed above in the description of the component (A2). As the component (A4), these compounds may be used alone or as a mixture of two or more.

The component (A5) is a divalent alcohol having 2 to 20 carbon atoms, preferably 3 to 18 carbon atoms. The dihydric alcohol here refers to those having no ether bond in the molecule. Examples of the dihydric alcohol having 2 to 20 carbon atoms include ethylene dalycol, 1,3_propanediol, 1,2-propanediol, 1,4-butanediol, 1,2-butanediol, 2-methyl-1,3 —Propanediol, 1,5-pentanediol, 1,2-pentanediol, neopentyl glycol, 1,6 monohexanediol, 1,2-hexanediol, 2-ethyl-2-methinole 1, 3-Propanediol, 2-Methylanol 2,4_Pentanediol, 1,7_Heptanediol, 1,2_Heptanediol, 2-Methyl-1-Propinole 1,3-Propanediol 2, 2, _Jetinore 1,1,3-propanediol, 1,8-octanediol, 1,2-octanediol, 1,9-nonanediol, 1,2-nonanediol, 2-butyl-2-ethyl-1,3-propanedi Lumpur, 1, 1 0-decanediol, 1, 2-decanediol, 1, 1 1 over © emissions decane O over 1, 2-undecanediol, 1,12-dodecanediol, 1,2-dodecanediol, 1,13-tridecanediol, 1,2-tridecanediol,

1,14-tetradecanediol, 1,2-tetradecanediol, 1,15-heptadecanediol, 1,2-heptadecanediol, 1,16-hexadecanediol, 1,2-hexadecanediol, 1, 1 7-heptadecanediol, 1,

2-heptadecanediol, 1, 18-octadecanediol, 1,2-octadecanediol, 1,19_nonadecanediol, 1,2_nonadecanediol,

1, 20-icosadecanediol, 1,2-icosadecanediol and the like.

Among these, 1, 4-butanediol, 1,5_pentanediol, neopentylglycolanol, 1,6-hexanediol, 2-methylolene 2,4-pentanedio are preferred because of their excellent processability. -Nore, 2-Echinore 2-Metinore 1, 3-Prono. Diol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 1,11 1undecanediol, 1,12-dodecane Diols are preferred. As the component (A5), these compounds may be used alone or as a mixture of two or more.

The component (A 6) is a dihydral alcohol sole having 2 to 20 carbon atoms, preferably 3 to 18 carbon atoms (excluding those having an ether bond in the molecule). Or esterified. (A6) As an ingredient,

A part of or all of the terminal hydroxyl groups of the dihydric alcohol of the component (A 5) can be used as a hydrocarbyl ether. Here, the hydrocarbyl group represents a hydrocarbon group having 1 to 24 carbon atoms, and specifically includes the groups listed in the description of the component (A2). Among these, from the viewpoint of excellent processability, 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, and the number of carbon atoms is 3 ~ 12 linear or branched alkyl group, oleyl group

(Residue obtained by removing a hydroxyl group from oleyl alcohol) is more preferable.

As the component (A6), one obtained by esterifying one or both of the terminal hydroxyl groups of the dihydric alcohol of the component (A5) can also be used. As the acid used for esterification, carboxylic acid is usually mentioned. This carboxylic acid is a monobasic acid However, monobasic acids are usually used. Specific examples include those listed in the description of the component (A2). Furthermore, the ester of the component (A 6) may be one obtained by esterifying one of the terminal hydroxyl groups of the dihydric alcohol of the component (A 5) (partial ester), and both of the terminal hydroxyl groups are esterified. (Complete ester). Of these, partial esters are preferred because of their excellent processability. As the component (A 6), these compounds may be used alone or as a mixture of two or more.

The component (A7) is a trivalent alcohol having 3 to 20 carbon atoms, preferably 3 to 18 carbon atoms. The trihydric alcohol as used herein means one having no ether bond in the molecule. Examples of the trihydric alcohol having 3 to 20 carbon atoms include glycerin, 1, 2, 3 —butanetriol, 1, 2, 4_butanetriol, 1, 2, 5—pentant rioinole, 1, 3, 5—pentane Trio 1 Norre, 1, 2, 3 _Pentantrio 1 Norre, 1, 2, 4—Pentanetriol, 1, 2, 6—Hexanetriol, 1, 2, 3—Hexanetriol, 1, 2, 4— Hexanetriol, 1, 2, 5—Hexantriol, 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 —Decantriol, 1, 2, 1 1— Decanetriol, 1, 2, 1 2 -dodecanetriol, 1, 2, 1 3—tridecanetriol, 1, 2, 14— Tradecane triol, 1, 2, 15-pentadecane triol, 1, 2, 16-hexadecane triol, 1, 2, 17-heptadecane triol, 1, 2, 18-octadecane triol 1, 2, 19-nonadecane triol, 1, 2, 20-yco santriol and the like. Among these, 1, 2, 12-dodecane triol, 1, 2, 13-tridecane triol, 1, 2, 14-tetradecane triol, 1, 2, 15_ Pentadecane triol, 1, 2, 16-hexadecane triol, 1, 2, 17-heptadecane triol, 1, 2, 18-octadecane triol are preferred. As the component (A7), these compounds may be used alone or as a mixture of two or more. The component (A 8) is a hydrocarbyl etherification of a trivalent alcohol having 3 to 20 carbon atoms, preferably 3 to 18 carbon atoms (excluding those having an ether bond in the molecule). Or esterified. (A8) As a component,

(A 7) A component obtained by converting part or all of the terminal hydroxyl groups of the trihydric alcohol of the component into a hydrocarbyl ether can be used. Here, the hydrocarbyl group represents a hydrocarbon group having 1 to 24 carbon atoms, and specifically includes the groups listed in the description of the component (A2). Among these, from the viewpoint of excellent processability, 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, and the number of carbon atoms is 3 ~ 1 2 linear or branched alkyl group, oleyl group

In addition, as the component (A8), one obtained by esterifying one or all of the terminal hydroxyl groups of the trihydric alcohol of the component (A7) 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 a monobasic acid is usually used. Specific examples include those listed above for the component (A2). In addition, as the ester of component (A 8),

(A 7) One or two terminal hydroxyl groups of the trihydric alcohol of the component may be esterified (partial ester), or all of the terminal hydroxyl groups may be esterified (complete ester) Good. Among these, partial esters are preferable from the viewpoint of excellent processability.

As component (A 8), among components (A7), glycerin, 1, 2, 3-butanetriol, 1, 2, 4-butantriol, 1, 2, 5-pentanetriol, 1, 3, 5 —Pentanetriol, 1, 2, 3—Pentanetriol, 1,2,4—Pentantriol, 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-Hydrotriol hydrocarbyl ether or partial ester is preferred. In addition, as the component (A 8), these 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 (A 1) to (A8) may be used alone, or a mixture of two or more oxygen-containing compounds having different structures may be used. Also good. Among the components (A 1) to (A8), from the viewpoint of excellent processability, the components (A3), (A4), (A5) and (A8) are preferred, (A3), (A4) ) Component and (A8) component are more preferred.

Further, the content of the oxygen-containing compound in the lubricating oil composition for metal working of the present invention is 0.005 to 10.0 mass% based on the total amount of the lubricating oil composition. That is, the content of the oxygen-containing compound is 0.005% by mass or more, preferably 0.05% by mass or more, more preferably 0.1% by mass or more. On the other hand, the content of oxygen-containing compounds is 10 mass. / ₀ or less, preferably 5.0% by mass or less, more preferably 2.0% by mass or less. If the content of the oxygen-containing compound is too small, the effect of improving the workability may be insufficient, and even if the content is increased, the effect commensurate with the content may not be obtained. The lubricating oil composition for metal working of the present invention can further contain an oily agent. As the oil agent, in order to further improve the processability, it is preferable to use at least one oil agent selected from the following components (B 1) to (B 3). The oil-based agent includes those usually used as an oil-based agent for lubricating oil.

(B 1) Esters

(B 2) Monohydric alcohol

(B 3) Carboxylic acid

The ester as the component (B 1) can be obtained by reacting an alcohol with a carboxylic acid. The alcohol may be a monohydric alcohol or a polyhydric alcohol. The carboxylic acid may be a monobasic acid or a polybasic acid.

As the monohydric alcohol, a monohydric alcohol having 1 to 24 carbon atoms is usually used. Such alcohols may be linear or branched. Examples of monohydric alcohols having 1 to 24 carbon atoms include methanol, ethanol, linear or branched propanol, linear or branched butanol, linear or branched pentaanol, linear or branched Hexanol, straight or branched heptanol, straight or Is a branched octanol, linear or branched nonanol, linear or branched decanol, linear or branched undeanol, linear or branched dodecanol, linear or branched tridecanol, Linear or branched tetradecanol, linear or branched pentadecanol, linear or branched hexadecanol, linear or branched heptadecanol, linear or branched octadecanol, straight Examples include linear or branched nonadecanol, linear or branched eicosanol, linear or branched heneicosanol, linear or branched tricosanol, linear or branched tetracosanol, and mixtures thereof.

As the polyhydric alcohol, a polyhydric alcohol having 2 to 10 valences, preferably 2 to 6 valences is usually used. Examples of 2- to 10-hydric alcohols include ethylene glycol, polyethylene glycol, polyethylene glycol (ethylene oxide 3- to 15-mer), propylene glycol, dipropylene dallicol, polypropylene glycol (propylene oxide 3- to 15-amount) ), 1,3-propanediol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, 2-methylolone 1,2-prono ヽ. 1,2-Mentane 1,3-Propanediol, 1,2-Pentanji-Nore, 1,3-Pentanji-Nore, 1,4-Pentanji-Nore, 1,5-Pentanediol, Neopentyl glycol, Glycerin , Polyglycerin (glycerin di- to 8-mer, for example, diglycerin, triglycerin, tetraglycerin), trimethylol alkane (for example, trimethylol ethane, trimethylol propane, trimethylol butane) and their 2 to 8 amount , Pentaerythritol and their 2- to 4-mer, 1, 2, 4-butanetriol, 1, 3, 5-pentanthriolinole, 1, 2, 6-hexanetriol, 1, 2, 3, 4—butanetetrol, sorbitol, sorbitan, sorbitol glycerin condensate, aditol, arabitol, Examples include xylitol and mannitol. In addition, saccharides such as xylose, arabitonole, ribose, rhamnose, gnole course, fructose, galactose, mannose, sonorebose, cebu biose, mantose, isomaltose, trehalose, sucrose can be used.

Among these, ethylene glycol, diethylene glycol, polyethylene dallicol (more preferably, 3- to 10-mer of ethylene oxide), propylene dallicol, dipropylene glycol, polypropylene glycol (more preferably Propylene oxide 3- to 10-mer), 1,3-propanediol, 2-methyl-1,2-propanediol, 2-methyl-1,3-propanediol, neopentyl glycol, glycerin, diglycerin , Triglycerin, trimethylol alkanes (eg, trimethylol ethane, trimethylolpropane, trimethylorolebutane) and their 2-4 tetramers, pentaerythritol, dipentaerythritol, 1, 2, 4 —butanol, 1, 3, 5—pentanthriol, 1, 2, 6-hexanetriol, 1, 2, 3, 4-butanetetrol, sorbitol, sorbitan, sorbitol glycerin condensate, ad-tol, a Divalent to 6-valent polyhydric alcohols such as rabitol, xylitol, mannitol, and mixtures of these Etc. is more preferable. More preferred are ethylene glycol, propylene glycol / l, neopentizoleglycose, glycerin, trimethylol-noreethane, trimethylolpropane, pentaerythritol, sonorebitan and mixtures thereof.

In addition, examples of the monobasic acid constituting the ester oil-based agent include linear or branched fatty acids usually having 6 to 24 carbon atoms. Further, the monobasic acid may be a saturated fatty acid, an unsaturated fatty acid, or a mixture thereof.

Examples of unsaturated fatty acids include linear or branched hexenoic acid, linear or branched heptenoic acid, linear or branched octenoic acid, linear or branched nonenoic 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 Ktadecenoic acid, linear or branched hydroxytadecenoic acid, linear or branched nonadecenoic acid, linear or branched eicosenoic acid, linear or branched heneicosenoic acid, linear or branched Examples include docosenoic acid, linear or branched tricosenoic acid, and linear or branched tetracosenoic acid. 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 constituting the ester oily agent 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 a saturated dibasic acid, an unsaturated dibasic acid, or a mixture thereof.

Saturated dibasic acids include ethanenic acid, propanedioic acid, linear or branched butanedioic acid, linear or branched pentanedioic acid, linear or branched hexanedioic acid, linear or linear Branched octanedioic acid, linear or branched nonannic acid, linear or branched decanoic acid, linear or branched undecanedioic acid, linear or branched dodecanedioic acid, linear or branched Examples include branched tridecanedioic acid, linear or branched tetradecanedioic acid, linear or branched heptadecanedioic acid, linear or branched hexadecanedioic acid, and the like. Examples of unsaturated dibasic acids include linear or branched hexenedioic acid, linear or branched otatenedioic acid, linear or branched nonennic acid, linear or branched decenedioic acid, straight chain Or branched undecenedioic acid, linear or branched dodecenedioic acid, linear or branched tridecenedioic acid, linear or branched tetracenedioic acid, linear or branched heptadecenedioic acid, straight Examples include chain or branched hexadecenedioic acid.

Examples of the ester oil-based agent include the following components (l b) to (7 b). As the ester oily agent, an ester obtained by reacting an arbitrary alcohol with a carboxylic acid can be used as in these exemplified components, and the ester oily agent is not particularly limited thereto.

(l b) Esters of monohydric alcohols and monobasic acids

(2b) Esters of polyhydric alcohols and monobasic acids

(3b) Esters of monohydric alcohols and polybasic acids

(4b) Esters of polyhydric alcohols and polybasic acids

(5b) Mixtures of monohydric and polyhydric alcohols and polybasic acids Esters (6b) Mixed ester of polyhydric alcohol and a mixture of monobasic acid and polybasic acid

(7b) Mixed ester of monohydric alcohol and polyhydric alcohol mixture with monobasic acid and polybasic acid mixture When polyhydric alcohol is used as the alcohol component, the ester may be polyvalent. A complete ester in which all hydroxyl groups in the alcohol are esterified. When a polybasic acid is used as the carboxylic acid component, the ester 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 esterified. Alternatively, it may be a partial ester remaining as a carboxyl group.

As the ester oily agent, any of the above can be used, but from the viewpoint of excellent processability, (1 b) -ester of a monohydric alcohol and a monobasic acid and (3 b) monohydric alcohol and a polybasic Esters with acids are preferred. Especially for aluminum fin processing and aluminum rolling, an ester of (lb) -valent alcohol and a monobasic acid is more preferable, and in the rolling of metals other than aluminum, an ester of (lb) -valent alcohol and a monobasic acid is more preferable. More preferably, the combination of (1 b) -ester of monohydric alcohol and monobasic acid and (3 b) -ester of polyhydric acid and polybasic acid is most preferred.

Used as an oiliness agent (lb) —The total number of carbon atoms of the ester of a monohydric alcohol and a monobasic acid is not particularly limited, but the total number of carbon atoms of the ester is preferably 7 or more, and more than 9 from the viewpoint of improving processability. Is more preferable, and 11 or more is most preferable. Further, from the viewpoint of oil agent removal property, the total carbon number of the ester is preferably 26 or less, more preferably 24 or less, and most preferably 22 or less. The carbon number of the monohydric alcohol is not particularly limited, but preferably 1 to 10 carbon atoms, more preferably 1 to 8 carbon atoms, still more preferably 1 to 6 carbon atoms, and most preferably 1 to 4 carbon atoms. preferable. The carbon number of the monobasic acid is not particularly limited, but preferably 8 to 22 carbon atoms, more preferably 10 to 20 carbon atoms, and most preferably 12 to 18 carbon atoms. It is preferable to set the total carbon number, the carbon number of the alcohol, and the carbon number of the monobasic acid as described above. The upper limit value is likely to increase the occurrence of stinning corrosion. In consideration of the fact that there is a greater risk of losing fluidity and the handling becomes difficult and the possibility of precipitation due to a decrease in solubility in base oil. This is because the working environment deteriorates due to odor.

The form of the ester of (3b) -hydric alcohol and polybasic acid used as an oily agent in the present invention is not particularly limited, but is a diester represented by the following formula (3) or an ester of trimellitic acid Is preferred.

R ¹ — O— CO (CH ₂ ) _n CO-OR ² (3)

(In the formula (3), R ¹ and R ² are the same or different groups and represent a hydrocarbon group having 3 to 10 carbon atoms, and n represents 4 to 8)

In the above formula (3), R ¹ and R ² may be hydrocarbon groups having 3 or more carbon atoms from the viewpoint that the improvement effect of the lubrication performance may not be expected or the working environment is deteriorated by odor. preferable. In addition, there is a greater risk of increasing the occurrence of stains and corrosion, a greater risk of loss of fluidity and difficulty in handling in winter, and a greater risk of precipitation due to a decrease in solubility in base oil. Therefore, in the formula (3), R ¹ and R ² are preferably hydrocarbon groups having 10 or less carbon atoms. In addition, there is a greater risk of increasing the occurrence of stains and corrosion, a greater risk of loss of fluidity and difficulty in handling in winter, and a greater risk of precipitation due to a decrease in solubility in base oil. From this point, n is preferably 8 or less. On the other hand, n is preferably 4 or more from the viewpoint that the effect of improving the lubrication performance may not be expected, and the working environment is deteriorated by odor. Of these, n = 4 and 6 are particularly preferred in view of the availability of raw materials and the price.

Examples of R ¹ and R ² of the diester include an alkyl group, an alkenyl group, an alkynolecycloanolyl group, an alkylphenyl group, and a phenylenorequinole group, and an alkyl group is particularly preferable. The alkyl group includes a linear alkyl group or a branched alkyl group, and a linear alkyl group and a branched alkyl group may be mixed, but a branched alkyl group is preferable. Examples of R ¹ and R ² include linear or branched propyl group, linear or branched butyl group, linear or branched pentyl group, linear or branched hexyl group, linear or branched hexyl group, and the like. Examples thereof include a butyl group, a linear or branched octyl group, a linear or branched nonyl group, and a linear or branched decyl group. The diester represented by the formula (3) can be obtained by any method. For example, a linear saturated dicarboxylic acid having 6 to 10 carbon atoms (adipic acid, pimelic acid, corkic acid, azelaic acid, sebacic acid in this order from 6 carbon atoms) or a derivative thereof, and an alcohol having 3 to 10 carbon atoms Examples of such a method include esterification. The number of carbons in the monohydric alcohol that esterifies trimellitic acid is not particularly limited, but there is a greater risk of increasing the occurrence of stains and corrosion, and there is a greater risk of loss of fluidity and difficulty in handling in winter. From the point that the solubility in the base oil decreases and the risk of precipitation increases, carbon number 1 to 10 is preferable, carbon number 1 to 8 is more preferable, carbon number 1 to 6 is more preferable, carbon number 1-4 are most preferred. The ester of trimellitic acid may be a partial ester (monoester or diester) or a complete ester (triester).

Examples of the monohydric alcohol of the component (B 2) include the compounds listed as the alcohol constituting the ester in the description of the component (B 1). As the monohydric alcohol, the total number of carbon atoms of the monohydric alcohol is preferably 6 or more, more preferably 8 or more, and most preferably 10 or more, from the viewpoint of excellent processability. In view of oil removability, the total number of carbon atoms of the monohydric alcohol is preferably 20 or less, more preferably 18 or less, and most preferably 16 or less.

The carboxylic acid (B 3) may be a monobasic acid or a polybasic acid. Examples of such a carboxylic acid include the compounds exemplified as the carboxylic acid constituting the ester in the description of the component (B 1). Of these, monobasic acids are preferred because they are more excellent in processability. Further, from the viewpoint of excellent processability, the total carbon number of carboxylic acid is preferably 6 or more, more preferably 8 or more, and most preferably 10 or more. Also, from the viewpoint of oil agent removability, the total carbon number of the carboxylic acid is preferably 20 or less, more preferably 18 or less, and most preferably 16 or less.

As the oily agent used in the lubricating oil composition for metalworking of the present invention, only one selected from the above-mentioned various oily agents may be used alone or as a mixture of two or more. (1) Esters with a total carbon number of 7 to 26 obtained from monohydric alcohols and monobasic acids, (2) Monohydric alcohols with 6 to 20 carbon atoms, especially those with 9 or more carbon atoms. A combination of a monohydric alcohol and a monohydric alcohol having 8 or less carbon atoms, (3) a monobasic acid having 6 to 20 carbon atoms, or a mixture thereof is preferable. The content of the oiliness agent is 0 based on the total amount of the lubricating oil composition for metal working of the present invention. 0 1 to 70% by mass. From the viewpoint of processability, the content of the oily agent is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and still more preferably 0.07% by mass or more. On the other hand, the upper limit of the content of the oil agent is 70% by mass or less, and preferably 50% by mass or less, more preferably 15% by mass from the viewpoint of oil agent removal. /. Hereinafter, it is more preferably 10% by mass or less. Alkyl benzene can be blended in the lubricating oil composition for metalworking of the present invention, and is particularly a base oil with a low aromatic content, specifically aromatic 5 vol% or less (more specifically 1 vol% When using mineral oil or isoparaffin (see below) and adding alkylbenzene, the effect of adding an oil-based agent can be further increased. The kinematic viscosity at 40 ° C. of the alkylbenzene used in the present invention is in the range of 1 to 60 mm ² / s. When the kinematic viscosity at 40 ° C. is less than 1 mm ² / s, the addition effect is If the kinematic viscosity at 40 ° C exceeds 6 O mm ² , s, there is a possibility of increasing the occurrence of corrosion, preferably 40 mm ² / s or less, More preferably, it is 2 O mm V s or less.

Further, the alkyl group bonded to the benzene ring of the alkylbenzene used in the present invention may be linear or branched, and the carbon number is not particularly limited. An alkyl group having 1 to 40 carbon atoms is preferred.

Specific examples of the alkyl group having 1 to 40 carbon atoms include, for example, methyl group, ethyl group, linear or branched propyl group, linear or branched butyl group, linear or Branched pentyl group, linear or branched hexyl group, linear or branched heptyl group, linear or branched octyl group, linear or branched pentyl group Nord group, linear or branched decyl group, linear or branched undecyl group, linear or branched dodecyl group, linear or branched tridecyl group, straight Linear or branched tetradecyl group, linear or branched pentadecyl group, linear or branched hexadecyl group, linear or branched heptadecyl group, linear or branched Branched octadecyl group, linear or branched nonadecyl group, linear or A branched icosyl group, a linear or branched henicon group, a linear or branched docosyl group, a linear or branched tricosyl group, a linear or branched tetracosyl group, Linear or branched pentacosyl group, linear or branched Hexacosyl group, linear or branched heptacosyl group, linear or branched octacosyl group, linear or branched nonacosyl group, linear or branched triacontyl group, Linear or branched hentriacontyl group, linear or branched dotriacontyl group, linear or branched tritriacontyl group, linear or branched tetratriacontyl group, linear Linear or branched pentatriaconcyl group, linear or branched hexatriacontyl group, linear or branched hepta triacontyl group, linear or branched octa triacontyl group, Examples thereof include a linear or branched nonatriacontyl group and a linear or branched tetracontyl group.

The number of alkyl groups in alkylbenzene is usually 1 to 4, but from the viewpoint of stability and availability, alkylbenzene having 1 or 2 alkyl groups, that is, monoalkylbenzene, dialkylbenzene, or These mixtures are most preferably used. Of course, the alkylbenzene used may be not only a single structure of alkylbenzene but also a mixture of alkylbenzenes having different structures.

The number average molecular weight of the alkylbenzene according to the present invention is not limited at all, but is preferably 100 or more, more preferably 130 or more, from the viewpoint of the effect of addition. Also, if the molecular weight is too large, the possibility of increasing the occurrence of corrosion increases, so the upper limit of the number average molecular weight is preferably 3400 or less, more preferably 3220 or less.

The lubricating oil composition for metal working of the present invention may contain 0.1 to 50% by mass of the above alkylbenzene based on the total amount of the composition. The lower limit of the content is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and further preferably 1% by mass or more from the viewpoint of the effect of addition. Further, since the possibility of increasing the occurrence of sting and corrosion increases when the content is too large, the upper limit is preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 30%. It is less than mass%. The lubricating oil composition for metal working of the present invention may further contain a linear polyolefin having 6 to 40 carbon atoms. The lubricating oil composition contains linear olefin. As a result, the lubricity is further improved.

Straight chain olefins with less than 6 carbon atoms are not suitable because of their low flash point. In order to have an appropriate flash point, the number of carbon atoms is preferably 8 or more, more preferably 10 or more carbon atoms, and even more preferably 12 or more carbon atoms. ,. On the other hand, when the number of carbon atoms exceeds 40, it becomes difficult to use because it becomes solid, and it is difficult to mix and dissolve with other components (mineral oil and additives), etc., which is inappropriate. In addition, linear olefins with more than 40 carbon atoms are not common and are difficult to obtain. In view of such inconveniences, linear olefins having 30 or less carbon atoms are preferred. Such a straight-chain olefin may have one double bond or two or more in the molecule, but has one double bond. It is preferable. Also, the position of the double bond is not particularly limited, but from the viewpoint of excellent lubricity, a straight-chain olefin having a double bond at the terminal, that is, n- _α -olefin is preferable.

Examples of the linear olefins include 1-octene, 1-decene, 1-dodocene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-icosene, and mixtures of two or more thereof. As linear olefins, those obtained by various production methods can be used. For example, ethylene oligomers obtained by polymerizing ethylene by usual means can be used. In addition, as the linear olefin, these compounds may be used alone or as a mixture of two or more.

The content of the linear olefin is arbitrary, but from the viewpoint of improving the lubricity of the lubricating oil composition for metal working of the present invention, the content is 1% by mass based on the total amount of the lubricating oil composition. The above is preferable, 3% by mass or more is more preferable, and 5% by mass or more is more preferable. On the other hand, the content is preferably 30% by mass or less, more preferably 25% by mass or less, and more preferably 20% by mass or less on the basis of the total amount of the lubricating oil composition from the viewpoint of obtaining an effect corresponding to the addition amount. Is more preferable. In the lubricating oil composition for metal working of the present invention, in order to further improve the excellent effect, an extreme pressure additive, an antioxidant, a rust inhibitor, a corrosion inhibitor, an antifoaming agent, an Additives such as emulsifiers and fungicides alone or in combination of two or more And can be further contained.

Examples of extreme pressure additives include phosphorus compounds such as tricresyl phosphate, and organometallic compounds such as zinc dialkyldithiophosphate. Antioxidants include phenolic compounds such as 2,6-ditertiary butyl-p-cresol (DBPC), aromatic amines such as phenyl-α-naphthylamine, and organic compounds such as zinc dialkyldithiophosphate. A metal compound is mentioned. 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. Examples of the corrosion inhibitor include benzotriazole. Examples of antifoaming agents include silicone-based ones. Surfactant is used as demulsifier, quaternary ammonium salt as cation system, imidazoline type, sulfated oil as anion system, aerosol type, castor oil ethylene oxide adduct as nonion system, ether Type nonionic activator phosphate ester, ethylene oxide and propylene oxide copolymer, ester with dimer acid, and the like. Examples of mold inhibitors include phenolic compounds, formaldehyde donor compounds, salicylanilide compounds, and the like.

The total content of the additives is usually 15% by mass or less, preferably 10% by mass or less, based on the total amount of the lubricating oil composition for metal working of the present invention. In principle, the lubricating oil composition for metalworking of the present invention (hereinafter also referred to as the composition of the present invention) should be used in a non-aqueous state that does not substantially contain water except for natural moisture absorption during storage. In some cases, it may further contain water, and the composition of the present invention may be used in combination with water. In the case of containing water, the composition of the present invention comprises water in a continuous layer in which an oil component is finely dispersed to form emulsion, a solubilized state in which water is dissolved in the oil component, or a strong It can take any form of a suspension in which water and oil are mixed by stirring. In addition, the composition of the present invention and water can be separately supplied to the processing section for use. By simply diluting the composition (stock solution) of the present invention with water or using it together with water, it can be used as a metalworking fluid for actual use. Dilution factor (when used in combination, the dilution factor of the stock solution + water relative to the stock solution is the dilution factor). Generally, it is customary to obtain a practical metalworking fluid by diluting the stock solution with water at a weight ratio of 2 to 100 times, preferably 3 to 70 times, with a weight ratio. In this case, tap water, industrial water, ion exchange water, distilled water, etc. can be used as the dilution water, regardless of whether it is hard water or soft water. In the case of an emulsion type, when the composition of the present invention is diluted with water, an emulsion is obtained in which water is used as a continuous phase and oil components are finely dispersed therein. However, the average particle size of oil droplets dispersed in water is It is preferably 300 nm or less, particularly preferably 100 nm or less. This is because when the average particle size of the dispersed oil droplets is large, not only the surface gloss of the processed product is impaired due to the ease of formation of a foil, but also a fine filter cannot be used to clean the metal processing fluid.

The viscosity of the lubricating oil composition for metal working of the present invention is not particularly limited, but the kinematic viscosity at 40 ° C is 0.5 to 50 Omm ² / s, preferably 1.0 to ²⁰⁰ mm ² / s. It is. In aluminum fin processing, from the viewpoint of processability, oil volatility, and oil removal, preferably 1.0 to 5. OmmV s, more preferably 1.2 to 3.0 mm ² , s, most preferably Is 1.3 to 2.8 mm ² / s. In the aluminum rolling process, it is preferably 1.0 to 10 mm ² Zs, more preferably 1.0 to 8. Omn ^ Zs from the viewpoint of lubricity and surface quality. In the rolling of metals other than aluminum, preferably 1.0 to ²⁰ mm ² Zs, more preferably 2.0 to: 15 mm ² / s, most preferably 3.0 to 15 mm ² Z s. It is. The lubricating oil composition for metal processing of the present invention is used as a processing oil for various metals, and examples of applicable metals include aluminum, magnesium, and copper, iron, chromium, nickel, zinc, tin, and titanium. Mention may be made of transition metals, and alloys thereof. Applicable machining methods include cold, warm and hot rolling, press, stamping, ironing, drawing, drawing, forging, metal processing such as cutting and grinding including micro-cutting (MQL). Can be mentioned. The lubricating oil composition for metal working according to the present invention is particularly suitable for processing aluminum fin materials (flat pure aluminum (purity 99% or more) or alloys containing aluminum as a main component), cold and warm of various metals. And suitable for cold rolling. Among these rolling methods, it is particularly suitable for cold rolling. Among the rolling of various metals, high-purity aluminum (purity of 99.9% or more (including those with a purity of 99.99% or more)) and aluminum are the main components. It is suitable for rolling stainless steel, copper and copper alloy, and most preferred is high-purity aluminum and aluminum-based alloy rolling. In the processing of aluminum fin materials, the lubricating oil composition for metal processing of the present invention should be used not only for the pre-coating material in which the surface of the aluminum fin material is pre-coated, but also for materials that have not been subjected to such processing. Can do.

Here, the term “film” refers to a film composed of a corrosion-resistant base film formed on an aluminum fin material and a hydrophilic film formed on the film. Examples of the corrosion-resistant undercoat include inorganic undercoats and organic undercoats. Examples of the inorganic base coating include a chromate coating, a boehmite coating, a kaic acid coating, or a combination of these. Organic base coatings include, for example, polyvinyl chloride vinyl chloride, polyethylene, polypropylene, and other vinyl resins, acrylic resins, epoxy resins, urethane resins, styrene resins, phenolic resins, Examples thereof include fluorine-based resins, silicon-based resins, diallyl phthalate-based resins, polycarbonate-based resins, polyamide-based resins, alkyd-based resins, polyester-based resins, urea melamine resins, polyacetal-based resins, and fiber-based resins.

Examples of the hydrophilic film include the following (a) to (e).

(a) Mainly composed of a low molecular organic compound having a carbonyl group and an alcoholic silicate

(b) Special water glass mainly composed of (a) above with water-soluble organic polymer compound added

(c) Sodium silicate, potassium silicate, silicates such as water glass, silicate, silica gel or alumina sol

(d) A hydrophilic modified organic polymer obtained by reacting a crosslinking agent comprising a low molecular weight organic compound having a carbonyl group with a hydrophilic organic polymer.

(e) A hydrophilic polyvinyl alcohol-based modified organic polymer obtained by reacting a polyvinyl alcohol-based hydrophilic organic polymer, a water-soluble organic polymer and a crosslinking agent.

For the processing of aluminum fin materials, for example, overhanging, drawing, punching, curling, and cylindrical rising wall around the tube through hole For example, squeezing process that makes squeezing high

[Industrial applicability]

As described above, the lubricating oil composition for metal working of the present invention can withstand high productivity and has high workability even under severe lubrication conditions, while maintaining good oil agent removability and deteriorating the working environment. In addition, it has excellent characteristics that it suppresses deterioration of product quality and does not increase the cost of oil.

[Best Mode for Carrying Out the Invention]

Hereinafter, preferred examples of the present invention will be described in more detail, but the present invention is not limited to these examples.

In Examples 1 to 18 and Comparative Examples 1 to 6, a lubricating oil composition for metal processing was prepared using each of the components shown below and used for processing of the aluminum fin material (the numerical unit of each component is the composition) It represents mass% based on the total amount of goods). Table 1 shows the content of each component of the lubricating oil for metal processing of each Example or Comparative Example.

(1) Base oil

Base Oil 1: aromatics 0.5 volume ^_0/0, naphthene content of 45 volume ^_0/0, paraffins 54.5% by volume, the initial boiling point 207 ° C, end point 288 ° C, kinematic viscosity (40 ° C) 1. 60 mm ² / s mineral oil

Base oil 2: Initial boiling point 1 61 1 ° C, end point 263 ° C, kinematic viscosity (40 ° C) 2. 45 mm ² / s isoparaffin

(2) Epoxy compounds

Epoxy compound 1: Noyulphenyldaricidyl ether

Epoxy compound 2: 2-ethylhexyl glycidyl etherate

Epoxy compound 3: glycidyl 1,2,2-dimethyloctanoate

Epoxy compound 4: 1, 2-epoxystyrene

Epoxy compound 5: 1, 2 _Epoxydodecane

Epoxy compound 6: 1,2-epoxycyclopentane Epoxy compound 7: Hexyl epoxy stearate

Epoxy compound 8: Epoxidized soybean

(3) Comparative additive

Comparative additive 1: butyl laurate

Comparative additive 2: Lauryl alcohol The following evaluation tests were conducted on the lubricating oils of Examples 1 to 18 and Comparative Examples 1 to 6.

(Lubricity test)

Apply each of the lubricants of Examples 1 to 18 and Comparative Examples 1 to 6 to both sides of an aluminum plate (material: A 1 050 material) of length 30 Omm X width 3 Omm X thickness 0.8 mm. The metal block with the face (Material: SKD 1 1) and the metal block with the flat part (Material: SKD 1 1) are sandwiched between them, and the force when pulling the aluminum plate in one direction under the following conditions It was measured. The results were displayed by converting the pulling force into a friction coefficient.

Drawing condition

How to hold the block: 980N (l O O k g f)

Pull-out speed: 100 mm no m i n

(Volatility test)

The test piece of aluminum material washed with a solvent was left in a 145 ° C constant temperature bath for 3 minutes, and then the weight of the test piece was weighed. This was designated as A (g). Then, the test piece was cooled to room temperature in desiccator over data, it was applied to the test piece so that the respective lubricating oil of Example 1 to 1 8 and Comparative Example 1-6 to ² gZc m 2. The weights of the test pieces before and after coating were weighed to be B (g) and C (g), respectively. The test piece was allowed to stand in a thermostatic bath at 130 ° C for 3 minutes, and immediately the weight of the test piece was weighed, and this was designated as D (g). The amount of volatilization of each lubricating oil was determined from the values of A, B, C and D according to the following formula.

Volatilization amount (mass%) = 1 00 X (DA) / (CB) (Storage stability 1)

The lubricating oils of Examples 1 to 18 and Comparative Examples 1 to 6 were put into a 100 cc candlestick, stored in a room at 22 ° C (room temperature), and the state after one month was observed. .

The evaluation is ○ for transparency, △ for cloudiness, and X for precipitation.

(Storage stability 2)

The lubricating oils of Examples 1 to 18 and Comparative Examples 1 to 6 were placed in a 100 cc candle bottle, stored in a constant temperature bath at 0 ° C., and the state after one month was observed.

The evaluation is ○ for transparency, △ for cloudiness, and X for precipitation. The evaluation results are also shown in Table 1. The lubricity is poor when no epoxy compound is included.

In Examples 1 to 33 and Comparative Examples 7 to 15, metal processing lubricants were prepared using the components shown below, and a rolling test was performed on each material (the numerical unit of each component is the composition). It represents mass% based on the total amount). Table 2 shows the content of each component of the lubricating oil for metal working of each Example and Comparative Example.

(1) Base oil

Base Oil 3:40 kinematic viscosity at ° C 2. of 3 mm ² Z s mineral (paraffin 35 volume ^_0/0, naphthenic 64.5 volume% aromatic 0.5 volume%)

Base oil 4: Kinematic viscosity at 40 ° C 6.9 mm ² Z s mineral oil (48% paraffin, 50% naphthene, 2% aromatic)

(2) Oily agent

Oiliness agent 1: Lauryl alcohol

Oiliness agent 2: Butyl stearate '

Oiliness agent 3: Diisononyl adipate

(3) Epoxy compounds

Epoxy compound 9: i_Butylphenyl daricidyl ester

Epoxy compound 10: Octyl glycidyl ether Epoxy compound 1 1: Glycidinore t-peptylbenzoate

Epoxy compound 4: 1, 2_Epoxystyrene

Epoxy compound 5: 1, 2-epoxydodecane

Epoxy compound 1 2: 1, 2-Epoxycyclohexane

(4) Oxygenated compounds

Oxygenated compounds 1: 1, 2-dodecanediol

Oxygenated compound 2: Tripropylene glycol The materials, rolling conditions and evaluation methods used in the rolling test are as follows.

(1) Material

Material 1: Aluminum JISA 1 0 5 0 0. 3 3 mm thickness, 6 Omm width Material 2: Aluminum JISA 5 1 8 2 0. 3 3 mm thickness, 6 Omm width Material 3: Stainless steel SUS 3 04 0. 3 3 mm Thickness, 6 Omm width Material 4: Copper 0.33 mm thickness, 6 Omm width

Material 5: 7 Z 3 brass (70% copper, 30% zinc) 0.3 3 mm thick, 60 mm wide

(2) Rolling conditions

Work roll diameter: 5 1 mm

Ji rolling speed: a 5 ra / m 1 n, 3 80 mZ m ι n

Rolling distance: 4 20 m

(3) Evaluation method

a) Rolling limit rolling reduction

Rolling was performed at a rolling speed of 35 m / min using the above oil agent, and the rolling reduction rate was gradually increased from 30% to obtain the maximum rolling reduction rate that can be rolled normally without surface damage such as seizure. .

b) Uneven gloss

Using the above oil agent 10 L, rolling was performed at a rolling speed of 40 Om / min and a reduction rate of 18% for 1 minute 40 seconds, sampling the location of 40 Om as the material length from the start of rolling, and in the width direction The gloss value was measured at regular intervals of 5 points and the standard deviation was obtained.

c) Abrasion powder generation

The oil used after the gloss unevenness test is filtered through a 0.1 μ filter, and the trapped wear is detected. The powder was dissolved with acid and the amount was determined by atomic absorption. The surface of the rolled material was wiped off, and the aluminum captured by the absorbent cotton was dissolved in acid and quantified by atomic absorption spectrometry. In the absorbent cotton pressing jig, the two fastening screws were fixed with a torque of 0.4 Nm so that a constant force was always applied to the surface of the material. Was converted to the amount per material lm ² and used as the amount of wear powder generated. For each material, the following elements were measured as wear powder.

Material 1 and 2: Aluminum

Material 3: Iron

Material 4 and 5: Copper

d) Annealing (Aluminum materials 1 and 2 only)

The coil after gloss unevenness test (from the start of rolling to 40 Om) was annealed at 35 ° C to evaluate the occurrence of oil stain.

○: No sting

Δ: Slight occurrence of sting

X: Sting occurs

XX: Remarkable stain generation The evaluation results are also shown in Table 2. However, when an epoxy compound is added, the results should be satisfactory in terms of rolling limit%, uneven gloss, amount of wear powder, and stain generation compared to the comparative example. Is obtained. On the other hand, when the epoxy compound is not added, there are disadvantages such as low rolling limit or high wear (Comparative Examples 7, 12 and 14), high gloss unevenness and wear (Comparative Example 8). Have. In addition, when the amount of the epoxy compound added is too large, the gloss unevenness is poor and the stain is large (Comparative Example 10).

table 1

Table 2

Claims

The scope of the claims

1. A lubricating oil composition for metal working, comprising an epoxy compound in at least one base oil selected from mineral oil, synthetic oil and fat.

2. The lubricating oil composition for metal working according to item 1, wherein the epoxy compound is contained in an amount of 0.01 to 10% by mass based on the total amount of the composition.

3. The lubricating oil composition for metal working according to item 1, further comprising an oily agent selected from esters, monohydric alcohols and carboxylic acids.

4. The lubricating oil composition for metal working according to item 1, comprising a monohydric alcohol having 1 to 24 carbon atoms as an oily agent.

5. The lubricating oil composition for metal working according to item 1, wherein the epoxy compound is an alkyloxysilane having 4 to 20 carbon atoms.

6. The lubricating oil composition for metal processing according to item 1, which is used for processing an aluminum fin material.