JP2009029913A - Aluminum pipe drawing lubrication oil and method for drawing aluminum pipe by using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aluminum pipe drawing lubrication oil having excellent lubricity and enabling the drawing work at a low cost. <P>SOLUTION: The lubrication oil contains a base oil composed of one or more kinds of oils selected from mineral oils, and non-hydrogenated or hydrogenated polyisobutylene and isoparaffin, and one or more kinds of ingredients selected from additives, oily agents, lubrication improving agents, aromatic hydrocarbons and extreme pressure agents. The additive is composed of one or more kinds of substances selected from an amine derivative, an alkylene oxide adduct of a polyhydric alcohol having 3-6 hydroxyl groups and having a number-average molecular weight of ≥200 and <1,000, its hydrocarbyl ether, a hydrocarbyl ether of a polyalkylene glycol having a number-average molecular weight of ≥120 and <1,000, a 2-10C dihydric alcohol and an alkylsulfonic acid salt and its content is 0.01-2 mass%. The total content of the oily agent, the lubricity improving agent, the aromatic hydrocarbon and the extreme pressure agent is 0.1-50 mass%, and the kinematic viscosity of the lubrication oil is 5-50,000 mm<SP>2</SP>/s at 40°C. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an aluminum pipe drawing lubricating oil used for manufacturing a pipe made of an aluminum alloy and an aluminum pipe drawing method using the lubricating oil. Here, “aluminum” includes aluminum and aluminum alloys.

The aluminum drawing process is a method in which aluminum is pulled through a die to produce a tube, rod, or wire having the same cross section as the die hole shape. In general, it is processed at room temperature, but can be processed at high temperature.
In the drawing process of an aluminum tube, for example, in a state where a mandrel, a plug or the like is arranged on the inner surface of the aluminum tube, the aluminum tube is pulled through a die as described above, so that not only the outer shape of the tube but also the inner diameter or the wall thickness is increased. Can also be finished to the required dimensions.

  Also, when processing an aluminum tube made of an aluminum material having a large deformation resistance, or when processing a large amount of deformation, a large space is required between the die and the aluminum material or between the inner plug and the aluminum tube. A frictional force may be applied to cause burn-in scratches in the direction of the pipe, and in some cases, a pipe break may occur.

In order to prevent such a problem, in the drawing process, lubricating oil has been supplied to aluminum pipes, dies, plugs, and the like.
As such a lubricating oil, there is hardly any oil specialized for drawing processing, and generally lubricating oil for aluminum processing has been widely used. For example, in light processing or processing of an aluminum tube made of a soft aluminum material, for example, a lubricating oil in which an oily agent such as a fatty acid ester, an alcohol, or a polyol ester is added to a base oil made of a high-viscosity synthetic polymer hydrocarbon Was used. Also, when processing aluminum pipes made of aluminum materials with high deformation resistance or when processing is large, high-viscosity lubricating oils, highly adsorbing oily agents, or extreme pressure agents are used as lubricating oils. It was.

  Specific examples of such lubricating oils include lubricating oil compositions containing base oils such as mineral oils, synthetic oils, and fats, and fatty acid ester-based ashless friction modifiers and aliphatic amine-based ashless friction modifiers. (Patent Document 1). There are also lubricating oil compositions for plastic working containing zinc dithiophosphate having a specific composition (Patent Documents 2 and 3).

  However, even when the above-described lubricating oil is used for drawing, there is a limit, and depending on the manufacturing conditions, frictional force is generated as described above, and defects such as burn-in scratches and pipe breakage may occur. . Further, the conventional lubricating oil has a problem that the manufacturing cost is relatively high.

JP 2004-358495 A JP 2001-348586 A JP 2001-348588 A

  The present invention has been made in view of such conventional problems, and provides an aluminum pipe drawing lubricating oil that has excellent lubricity and can be drawn at low cost, and an aluminum pipe drawing method using the same. It is something to try.

The first invention is an aluminum pipe drawing lubricant used for drawing of an aluminum pipe,
The aluminum pipe drawing lubricating oil includes a base oil comprising at least one selected from mineral oil, non-hydrogenated or hydrogenated polyisobutylene, and isoparaffin, an additive, an oily agent, a lubricant improver, and an aromatic hydrocarbon. , And one or more of extreme pressure agents,
The additive is an amine derivative, an alkylene oxide adduct of a polyhydric alcohol having a number average molecular weight of 200 or more and less than 1000 and having 3 to 6 hydroxyl groups, its hydrocarbyl ether, a polyalkylene glycol having a number average molecular weight of 120 or more and less than 1000 Consisting of one or more selected from hydrocarbyl ethers, dihydric alcohols having 2 to 10 carbon atoms, and alkyl sulfonates,
The content of the additive is 0.01 to 2.0% (mass%, the same applies hereinafter),
The total content of the oil agent, the lubricity improver, the aromatic hydrocarbon, and the extreme pressure agent is 0.1 to 50%,
The aluminum pipe drawing lubricant has a kinematic viscosity at a temperature of 40 ° C. of 5 to 50000 mm ² / s. (Claim 1)

Since the aluminum pipe drawing lubricating oil of the first invention has the above-described configuration, the conventional problems described above can be solved at a stretch.
That is, the aluminum pipe drawing lubricating oil can exhibit excellent aluminum powder dispersibility for any aluminum pipe. Therefore, even when an aluminum tube having a large deformation resistance is drawn or when a drawing process having a large deformation amount is performed, adhesion of aluminum wear powder generated between the aluminum tube and, for example, a die or a plug is prevented. It can be sufficiently suppressed. Therefore, it is possible to prevent problems such as burn-in scratches and tube breakage in the aluminum tube.

  In addition, the above-mentioned aluminum pipe drawing lubricating oil includes, as essential components, a base oil comprising at least one selected from mineral oil, non-hydrogenated or hydrogenated polyisobutylene, and isoparaffin, an additive, an oily agent, and improved lubrication. 1 type (s) or 2 or more types are contained among an agent, an aromatic hydrocarbon, and an extreme pressure agent. All of these essential components are relatively inexpensive, and a low-cost aluminum pipe drawing lubricant can be obtained.

Further, it contains 0.01 to 2.0% of a specific additive, and one or more of the oily agent, the lubricity improver, the aromatic hydrocarbon, and the extreme pressure agent are 0 in total. 0.1 to 50%, and by making the kinematic viscosity of the entire aluminum pipe drawing lubricating oil 5 to 50000 mm ² / s at a temperature of 40 ° C., excellent lubricity can be obtained.

  In general, the lubricating oil is removed after the drawing process by washing or the like in order to prevent adverse effects on the process after the drawing process. Since conventional lubricating oil has been difficult to remove by washing, in drawing, a film of resin or the like is formed on the surface of the aluminum material, and the lubricating oil is supplied onto the film to perform drawing. The method was used. Such a method has a problem that the manufacturing cost increases because the number of steps for forming a coating film increases.

The above-mentioned aluminum pipe drawing lubricating oil of the present invention can be easily washed with a cleaning solution such as a chlorine-based solvent such as perchlene (tetrachloroethylene), trichrene (trichloroethylene), methylene chloride, and trichloroethane, or a hydrocarbon-based solvent such as acetone after the drawing process. Can be removed. Therefore, it is possible to easily prevent the aluminum pipe drawing lubricant from adversely affecting the process after the drawing process. Furthermore, since it is not necessary to form a film, the drawing process can be performed at low cost.
As described above, according to the present invention, it is possible to provide an aluminum pipe drawing lubricating oil that has excellent lubricity and can be drawn at low cost.

  2nd invention supplies the said aluminum pipe drawing lubricating oil as described in 1st invention to the inner surface process and / or outer surface of an aluminum pipe, and performs the drawing process of an aluminum pipe characterized by the above-mentioned In the method (claim 7).

  In the drawing method, the aluminum pipe drawing lubricant of the first invention is supplied to the inner surface and / or the outer surface of the aluminum pipe to perform drawing. Therefore, the drawing process can be performed while suppressing the friction between the die and the plug, for example, by taking advantage of the excellent features of the aluminum pipe drawing lubricant. Therefore, it is possible to prevent the aluminum tube from being burned and broken, and to produce an aluminum tube with excellent surface quality.

In addition, since the aluminum pipe drawing lubricant can be easily removed by washing or the like as described above, it is not necessary to form a film of resin or the like on the aluminum pipe before drawing. Therefore, the drawing process of the aluminum tube can be performed at a low cost.
Thus, according to the present invention, an aluminum tube can be manufactured with excellent lubricity and low cost.

  As described above, the aluminum pipe drawing lubricating oil of the first invention is a base oil composed of one or more selected from mineral oil, unhydrogenated or hydrogenated polyisobutylene, and isoparaffin, an additive, and an oily agent. 1 type (s) or 2 or more types among a lubricity improver, an aromatic hydrocarbon, and an extreme pressure agent.

  When annealing is performed after the drawing process, it is preferable to use polyisobutylene and / or isoparaffin as the base oil. In this case, generation of oil stain can be prevented. Moreover, in this case, the odor of the aluminum pipe drawing lubricant can be suppressed, and the working environment can be improved.

  Moreover, when importance is attached to cost, it is preferable to use mineral oil as the base oil. As mineral oil, paraffinic mineral oil, naphthenic mineral oil and aroma mineral oil can be used. A non-aromatic mineral oil that is slightly more expensive than an aroma mineral oil but does not contain an aroma component can also be used. In this case, the cost can be reduced as compared with the case where polyisobutylene or isoparaffin is used as the base oil, and the working environment can be improved by suppressing odor and rough skin.

Moreover, it is preferable that content of the said base oil in the said aluminum pipe drawing lubricating oil is 45% or more.
When the content of the base oil is less than 45%, it may be difficult to remove the aluminum pipe drawing lubricating oil by washing after the drawing process, or the cost may increase.

  The additive includes an amine derivative, an alkylene oxide adduct of a polyhydric alcohol having 3 to 6 hydroxyl groups and a number average molecular weight of 200 or more and less than 1000, a hydrocarbyl ether thereof, a polyaverage alcohol having a number average molecular weight of 120 or more and less than 1000. It consists of 1 type, or 2 or more types chosen from the hydrocarbyl ether of alkylene glycol, a C2-C10 bihydric alcohol, and an alkyl sulfonate.

The amine derivative is preferably one or more selected from those having a number average molecular weight of 200 or more and less than 1000.
In particular, the amine derivative is preferably at least one selected from aliphatic amines, alkanol amines, aliphatic polyamines, aromatic amines, alicyclic amines, heterocyclic amines, and alkylene oxide adducts thereof ( Claim 2).
The amine derivative may contain a hydroxyl group or an ether group.

  Specific examples of the aliphatic amine include methylamine, ethylamine, butylamine, caprylamine, laurylamine, stearylamine, oleylamine, tallowamine dimethylamine, diethylamine, dioctylamine, butyloctylamine, distearylamine, Dimethyloctylamine, dimethyldecylamine, dimethyllaurylamine, dimethylmyristylamine, dimethylpalmitylamine, dimethylstearylamine, dimethylbehenylamine, dilaurylmonomethylamine, trioctylamine and the like can be used.

  Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, N-methylethanolamine, N, N-dimethylethanolamine, N-ethylethanolamine, N, N-diethylethanolamine, and N-isopropylethanol. Amine, N, N-diisopropylethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, N-methylisopropanolamine, N, N-dimethylisopropanolamine, N-ethylisopropanolamine, N, N-diethylisopropanolamine, N-isopropylisopropanolamine, N, N-diisopropylisopropanolamine, mono-n-propanolamine, di-n-propanol , Tri-n-propanolamine, N-methyln-propanolamine, N, N-dimethyln-propanolamine, N-ethyln-propanolamine, N, N-diethyln-propanolamine, N-isopropyln-propanol Amine, N, N-diisopropyl n-propanolamine, monobutanolamine, dibutanolamine, tributanolamine, N-methylbutanolamine, N, N-dimethylbutanolamine, N-ethylbutanolamine, N, N-diethylbutanol Amine, N-isopropylbutanolamine, N, N-diisopropylbutanolamine and the like can be used.

Examples of the aliphatic polyamine include ethylene diamine, diethylene triamine, triethylene tetraamine, hexamethylene diamine, and cured beef tallow propylene diamine.
As the aromatic amine, for example, aniline, dimethylaniline, diethylaniline and the like can be used.

  Examples of the alicyclic amine include N-cyclohexylamine, N, N-dicyclohexylamine, N, N-dimethyl-cyclohexylamine, N, N-diethyl-cyclohexylamine, N, N-di (3-methyl- (Cyclohexyl) amine, N, N-di (2-methoxy-cyclohexyl) amine, N, N-di (4-bromo-cyclohexyl) amine and the like can be used.

  Examples of the heterocyclic amine include pyrrolidine, piperidine, 2-pipecoline, 3-pipecoline, 4-pipecoline, 2,4-lupetidine, 2,6-lupetidine, 3,5-lupetidine, piperazine, homopiperazine, N- Methylpiperazine, N-ethylpiperazine, N-propylpiperazine, N-methylhomopiperazine, N-acetylpiperazine, N-acetylhomopiperazine, 1- (chlorophenyl) piperazine, N-aminoethylpiperidine, N-aminopropylpiperidine, N -Aminoethylpiperazine, N-aminopropylpiperazine, N-aminoethylmorpholine, N-aminopropylmorpholine, N-aminopropyl-2-pipecoline, N-aminopropyl-4-pipecoline, 1,4-bis (aminopropyl) Use piperazine Rukoto can.

  The alkylene oxide to be added can be obtained by addition polymerization of alkylene oxide such as ethylene oxide, propylene oxide, butylene oxide, α-olefin oxide, styrene oxide and the like. The polymerization form of the added alkylene oxide is not particularly limited, and may be homopolymerization of one type of alkylene oxide, random copolymerization of two or more types of alkylene oxide, block copolymerization, random / block copolymerization, or the like.

  The number average molecular weight is 200 or more and less than 1000, and the polyhydric alcohol alkylene oxide adduct having 3 to 6 hydroxyl groups has a number average molecular weight of 200 or more and less than 1000 and has 3 to 6 hydroxyl groups. Specific examples of the alcohol include glycerin, polyglycerin (eg, diglycerin, triglycerin, tetraglycerin, etc.), trimethylol alkane (eg, trimethylolethane, trimethylolpropane, trimethylolbutane, etc.) and this. 2-tetramer, pentaerythritol, dipentaerythritol, 1,2,4-butanetriol, 1,3,5-butanetriol, 1,2,6-hexanetriol, 1,2,3,4-butanetetra All, sorbitol, sorbitan, sorbitol grits Phosphorus condensate, anidol, arabitol, xylitol mannitol, idylitol, taritol, dulcitol, allitol, xylose, arabinose, ribose, rhamnose, glucose, fructose, galactose, mannose, sorbose, cellobiose, maltose, isomaltose, trehalose, sucrose, etc. Can be mentioned.

Examples of the alkylene oxide to be added include ethylene oxide, propylene oxide, 1,2-epoxybutane, 2,3-epoxybutane, 1,2-epoxy-1-methylpropane, 1,2-epoxyheptane, 1, 2-epoxyhexane and the like.
Examples of the adduct such as alkylene oxide include homopolymerization of one kind of alkylene oxide, random copolymerization of two or more kinds of alkylene oxide, block copolymerization, random / block copolymerization, and the like.
Moreover, when adding an alkylene oxide to the polyhydric alcohol which has 3-6 hydroxyl groups, the hydroxyl groups to be added may be all hydroxyl groups or some hydroxyl groups.

Moreover, what made some or all of the terminal hydroxyl groups of the alkylene oxide adduct which comprises the alkylene oxide adduct of the said polyhydric alcohol into hydrocarbyl ether can also be used.
The hydrocarbyl group is a hydrocarbon group having 1 to 24 carbon atoms.
Examples of the hydrocarbon group include an alkyl group, an alkenyl group, a cycloalkyl group, an alkylcycloalkyl group, an aryl group, an alkylaryl group, and an arylalkyl group.

  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, tert-butyl group, straight chain or branched Pentyl group, linear or branched hexyl group, linear or branched heptyl group, linear or branched octyl group, linear or branched nonyl group, linear or branched decyl group, straight Chain 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 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 heicosyl group, linear Or a branched docosyl group, linear or branched There tricosyl group, and Tetoraikoshiru group of straight or branched is.

  Examples of the alkenyl group having 2 to 24 carbon atoms include a vinyl group, a linear or branched propenyl group, a linear or branched butenyl group, a linear or branched pentenyl group, and a linear or branched hexenyl group. Group, linear or branched heptenyl group, linear or branched octenyl group, linear or branched nonenyl group, linear or branched decenyl group, linear or branched undecenyl group, linear or Branched dodecenyl group, linear or branched tridecenyl group, linear or branched tetradecenyl group, linear or branched pentadecenyl group, linear or branched hexadecenyl group, linear or branched heptadecenyl group A linear or branched octadecenyl group, a linear or branched nonadecenyl group, a linear or branched icosenyl group, a linear or branched henicosyl group, a linear or branched dococenyl group, a linear or branched group Branch tricocenyl , And there is a tetracosenyl group of straight or branched.

  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 a methylcyclopentyl group, a dimethylcyclopentyl group (including all structural isomers), a methylethylcyclopentyl group (including all structural isomers), a diethylcyclopentyl group ( Including all structural isomers), methylcyclohexyl group, dimethylcyclohexyl group (including all structural isomers), methylethylcyclohexyl group (including all structural isomers), diethylcyclohexyl group (including all structural isomers) Including), methylcycloheptyl group, dimethylcycloheptyl group (including all structural isomers), methylethylcycloheptyl group (including all structural isomers), and diethylcycloheptyl group (including all structural isomers) ) Etc.

  Examples of the aryl group having 6 to 10 carbon atoms include a phenyl group and a naphthyl group.

  Examples of the alkylaryl group having 7 to 18 carbon atoms include a tolyl group (including all structural isomers), a xylyl group (including all structural isomers), and an ethylphenyl 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 pentylphenyl group (all ), Linear or branched hexylphenyl group (including all structural isomers), linear or branched heptylphenyl group (including all structural isomers), linear or branched Branched octylphenyl groups (including all structural isomers), linear or branched nonylphenyl groups (including all structural isomers), linear or branched decylphenyl groups (including all structural isomers) ), Straight or branched unde Butylphenyl (including all structural isomers) group, and (including all structural isomers) linear or branched dodecylphenyl group and the like.

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

The alkylene oxide constituting the hydrocarbyl ether of polyalkylene glycol having a number average molecular weight of 120 or more and less than 1000 preferably has 2 to 6 carbon atoms.
Examples of such alkylene oxides include the above-mentioned alkylene oxide adducts of polyhydric alcohols, and those similar to those listed as alkylene oxides constituting the hydrocarbyl ether.

Moreover, as the hydrocarbyl ether of the polyalkylene glycol, one obtained by converting a part or all of the terminal hydroxyl groups of the polyalkylene glycol into a hydrocarbyl ether can be used.
Examples of the hydrocarbyl group include each group listed as the hydrocarbyl group constituting the alkylene oxide adduct of the above-mentioned polyhydric alcohol and the hydrocarbyl ether thereof.

  The dihydric alcohol having 2 to 10 carbon atoms does not have an ether bond in the molecule and has 2 to 10 carbon atoms. For example, ethylene glycol, 1,3-propanediol, propylene glycol, 1,4-butanediol, 1,2-butanediol, 2-methyl-1,3-propanediol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 2-ethyl-2-methyl -1,3-propanediol, 2-methyl-2,4-pentanediol, 1,7-heptanediol, 2-methyl-2-propyl-1,3-propanediol, 2,2-diethyl-1,3 -Propanediol, 1,8-octanediol, 1,9-nonanediol, 2-butyl-2-ethyl-1,3-propanediol, and 1,10 Decanediol, and the like.

  In addition, as the above alkyl sulfonate, dialkyl sulfo / succinate, alkane sulfonate, alpha olefin / sulfonate, linear alkyl benzene / sulfonate, molecular chain alkyl benzene / sulfonate, naphthalene sulfonate- There are formaldehyde condensates, alkyl naphthalene sulfonates, N-methyl-N-acyl taurines and the like. Examples of the cationic counter ion forming the salt include alkali metal (sodium, potassium, lithium, etc.) ions, alkaline earths. Examples include metal ions such as metal ions (magnesium, calcium, barium, etc.), ammonium ions, and the like.

Moreover, content of the said additive is 0.01 to 2.0%.
When the content of the additive is less than 0.01%, there is a problem in that the aluminum wear powder generated during the drawing process is not sufficiently dispersed and seizure flaws are generated. On the other hand, when the content of the additive exceeds 2.0%, there is a problem that the cost is increased and it is not industrially established.

  Moreover, when the said oiliness agent is contained, the lubricity of the said aluminum pipe drawing lubricating oil can be improved more. In general, in the drawing process of an aluminum tube, the lubricity of the lubricating oil is largely due to boundary lubricity. In the aluminum pipe drawing lubricating oil, the boundary lubricity can be improved by adding an oily agent, so that the lubricity can be further improved.

The oily agent is preferably at least one selected from natural fats and oils, synthetic esters, fatty acid esters, fatty acids, and alcohols (Claim 3).
Examples of the natural fats and oils include soybean oil, rapeseed oil, palm oil, palm oil, lard and beef tallow. Among these, palm oil and palm oil are preferable from the viewpoint of operability.

Next, examples of the synthetic ester include neopentyl glycol ester, trimethylol propane ester, and pentaerythritol ester. The fatty acid constituting the synthetic ester may be saturated or unsaturated, linear or branched, but has a carbon number of 12 to 18 in terms of compatibility with the base oil and handling. Those are more preferred. As the synthetic ester, either a full ester or a partial ester can be used.
Moreover, it is preferable that the said synthetic ester consists of 1 type, or 2 or more types chosen from a monoester, a diester, a triester, and a tetraester.
In this case, stability against oxidation due to heat and boundary lubricity can be further improved.

  Specific examples of the neopentyl glycol ester include neopentyl glycol capric acid monoester, neopentyl glycol capric acid diester, neopentyl glycol linolenic acid monoester, neopentyl glycol linolenic acid diester, neopentyl glycol stearic acid monoester. Ester, neopentyl glycol stearic acid diester, neopentyl glycol oleic acid monoester, neopentyl glycol oleic acid diester, neopentyl glycol isostearic acid monoester, neopentyl glycol isostearic acid diester, neopentyl glycol palm oil fatty acid monoester, neo Pentyl glycol palm oil fatty acid diester, neopentyl glycol beef tallow fatty acid monoester, O neopentyl glycol beef tallow fatty acid diester, neopentyl glycol palm oil fatty acid monoester of neopentyl glycol palm oil fatty acid diester, a composite esters of neopentyl glycol 2 mole dimer acid 1 mole of oleic acid 2 mol. Of these, particularly preferred are oleic acid, isostearic acid, coconut oil fatty acid and beef tallow fatty acid esters.

  Examples of the trimethylolpropane ester include trimethylolpropane capric acid monoester, trimethylolpropane capric acid diester, trimethylolpropane capric acid triester, trimethylolpropane linolenic acid monoester, trimethylolpropane linolenic acid diester, Methylolpropane linolenic acid triester, trimethylolpropane stearic acid monoester, trimethylolpropane stearic acid diester, trimethylolpropane stearic acid triester, trimethylolpropane oleic acid monoester, trimethylolpropane oleic acid diester, trimethylolpropane oleic acid Triester, Trimethylolpropane isostearic acid monoester, Trimethylo L-propane isostearic acid diester, trimethylolpropane isostearic acid triester, trimethylolpropane palm oil fatty acid monoester, trimethylolpropane palm oil fatty acid diester, trimethylolpropane palm oil fatty acid triester, trimethylolpropane beef tallow fatty acid monoester , Trimethylolpropane beef tallow fatty acid diester, trimethylolpropane beef tallow fatty acid triester, trimethylolpropane palm oil fatty acid monoester, trimethylolpropane palm oil fatty acid diester, trimethylolpropane palm oil fatty acid triester, trimethylolpropane 2 mol dimer acid There are complex esters of 1 mol and 4 mol of oleic acid. Of these, oleic acid, isostearic acid, palm oil fatty acid, and beef tallow fatty acid esters are particularly preferable.

  Examples of pentaerythritol include pentaerythritol capric acid monoester, pentaerythritol capric acid diester, pentaerythritol capric acid triester, pentaerythritol capric acid tetraester, pentaerythritol linolenic acid monoester, pentaerythritol linolenic acid diester, penta Erythritol linolenic acid triester, pentaerythritol linolenic acid tetraester, pentaerythritol stearate monoester, pentaerythritol stearate diester, pentaerythritol stearate triester, pentaerythritol stearate tetraester, pentaerythritol oleate monoester, pentaerythritol olein Acid diester, Enterythritol oleic acid triester, pentaerythritol oleic acid tetraester, pentaerythritol isostearic acid monoester, pentaerythritol isostearic acid diester, pentaerythritol isostearic acid triester, pentaerythritol isostearic acid tetraester, pentaerythritol palm oil fatty acid monoester, Pentaerythritol Palm Oil Fatty Acid Diester, Pentaerythritol Palm Oil Fatty Acid Triester, Pentaerythritol Palm Oil Fatty Acid Tetraester, Pentaerythritol Beef Fatty Acid Monoester, Pentaerythritol Beef Fatty Acid Diester, Pentaerythritol Beef Fatty Acid Triester, Pentaerythritol Beef Fatty Acid Tetraester, pentaerythrito Rupalm oil fatty acid monoester, pentaerythritol palm oil fatty acid diester, pentaerythritol palm oil fatty acid triester, pentaerythritol palm oil fatty acid tetraester, complex ester of pentaerythritolpropane 2 mol, dimer acid 1 mol, oleic acid 6 mol, etc. . Of these, oleic acid, isostearic acid, palm oil fatty acid, and beef tallow fatty acid esters are particularly preferable.

Next, as the fatty acid ester added as the oily agent, the general formula (2) R ₄ —COO—R ₅ (where R ₄ is an alkyl group having 7 to 17 carbon atoms, R ₅ is 1 to 4 carbon atoms) It is preferable to use a fatty acid ester represented by an alkyl group).
In the general formula (2), when the carbon number of the alkyl group R ₄ is 6 or less, the boundary lubricity of the aluminum pipe drawing lubricating oil is reduced, or the aluminum powder is liable to adhere to cause poor drawing. May happen. Moreover, in this case, the odor of the aluminum pipe drawing lubricating oil becomes tight and there is a possibility that the working environment is deteriorated. On the other hand, when the carbon number of the alkyl group R ₄ is 18 or more, or when the carbon number of the alkyl group R ₅ is 5 or more, the melting point of the aluminum pipe drawing lubricating oil becomes high and is easily solidified at room temperature. There is a risk. For this reason, when the aluminum pipe drawing lubricant is used, a heating facility or the like for heating the lubricating oil is required, which may make it difficult to handle the aluminum pipe drawing lubricant.

  Specific examples of the fatty acid ester include, for example, methyl caprylate, ethyl caprylate, propyl caprylate, butyl caprylate, methyl pelargonate, ethyl pelargonate, propyl pelargonate, butyl pelargonate, methyl caprate, ethyl caprate , Propyl caprate, butyl caprate, methyl laurate, ethyl laurate, propyl laurate, butyl laurate, methyl myristate, ethyl myristate, propyl myristate, butyl myristate, methyl palmitate, ethyl palmitate, palmitate Propyl acid, butyl palmitate, methyl stearate, ethyl stearate, propyl stearate, butyl stearate, methyl oleate, ethyl oleate, propyl oleate, butyl oleate There is.

  Next, as the fatty acid to be added as the oily agent, for example, linear saturation such as capric acid, undecanoic acid, lauric acid, tridecanoic acid, demisteric acid, pentadecanoic acid, palmitic acid, margaric acid, stearic acid, behenic acid, etc. Examples include fatty acids and unsaturated fatty acids such as palmitoleic acid, oleic acid, linoleic acid, linolenic acid, and ricinoleic acid. As industrially preferred fatty acids, lauric acid, myristic acid, palmitic acid, oleic acid and the like are preferable in consideration of lubricity, workability, long-term stability and cost.

Next, the alcohol added as the oily agent is preferably a higher alcohol represented by the general formula (3) R ₆ —OH (where R ₆ is an alkyl group having 8 to 18 carbon atoms).

In the case of the carbon number of the alkyl group R ₆ is 7 or less, or reduced boundary lubrication of the aluminum tube drawing lubricant, there is liable to be drawing failure occurs possibility aluminum powder is adhesion. Moreover, in this case, the odor of the aluminum pipe drawing lubricating oil becomes tight and there is a possibility that the working environment is deteriorated. On the other hand, when the number of carbon atoms of the alkyl group R ₆ is 19 or more, the melting point of the aluminum pipe drawing lubricating oil becomes high, and there is a possibility that it is likely to solidify at room temperature. For this reason, when the aluminum pipe drawing lubricant is used, a heating facility or the like for heating the lubricating oil is required, which may make it difficult to handle the aluminum pipe drawing lubricant. More preferably, the carbon number of the alkyl group R ₆ in the general formula (3) should preferably be 12-15.

Moreover, when the said lubricity improvement agent is contained, the lubricity of the said aluminum pipe drawing lubricating oil can be improved further.
The lubricity improver is preferably an α-olefin.

The α-olefin has a double bond at the end of the molecule and has a property of being easily chemisorbed on the surface of the aluminum tube, and is therefore suitable as a lubricity improver.
In general, during plastic processing such as aluminum drawing, an active new surface of aluminum appears. The α-olefin is mainly adsorbed on this new surface and plays a role as an oily agent, thereby improving the lubricity of the aluminum drawn lubricating oil. Before the plastic working, the surface of aluminum is covered with an oxide film, and fatty acid esters, fatty acids and the like are easily adsorbed to the aluminum covered with the oxide film.

  In the aluminum pipe drawing lubricating oil, the α-olefin used as the lubricity improver preferably has a total carbon number of 14 to 18. If the number of carbon atoms is less than 13, the boundary lubricity of the aluminum pipe drawing lubricating oil may be reduced. On the other hand, if the number of carbon atoms is 19 or more, the aluminum pipe drawing lubrication is performed at a temperature of about 0 ° C. There is a possibility that the oil is easily solidified. Therefore, it may be difficult to use in winter or cold regions.

Moreover, when it contains the said aromatic hydrocarbon, compatibility with a base oil, an additive, and a metal soap can be improved.
Further, when the aluminum pipe drawing lubricating oil contains the oily agent, the lubricity improver, the extreme pressure agent described later, and the like, the aromatic hydrocarbon is compatible with these and the base oil. Can be improved. As a result, the lubricity of the aluminum drawing lubricating oil can be further improved.

  The aromatic hydrocarbon preferably has 2 or less benzene rings per molecule. When the number of benzene rings contained in the aromatic hydrocarbon is 3 or more, the compatibility improvement effect may not be sufficiently exhibited.

（但し、Ｒ₁は炭素数１２〜１４のアルキル基あるいはアルケニル基、Ｒ₂及びＲ₃は炭素数１〜４のアルキル基である。） Moreover, when the said extreme pressure agent is contained, the lubricity of the said aluminum pipe drawing process lubricating oil can be improved more.
The extreme pressure agent is preferably an alkyl phosphonate ester and / or tolyl phosphate represented by the following general formula (1).

(However, R ₁ is an alkyl group or alkenyl group having 12 to 14 carbon atoms, and R ₂ and R ₃ are alkyl groups having 1 to 4 carbon atoms.)

When the carbon number of R ₁ is 11 or less, extreme pressure properties and extreme pressure lubricity properties are deteriorated, and there is a possibility that seizure occurs. On the other hand, when the carbon number of R ₁ is 15 or more, it may be difficult to remove the aluminum drawing lubricant by washing after drawing. In this case, when the aluminum drawing lubricant is adjusted, the viscosity becomes high and handling may be difficult.

When the carbon number of R ₂ or R ₃ is 5 or more, industrial production costs increase, and there is a possibility that the effect of improving lubricity commensurate with the cost cannot be obtained sufficiently.

The total content of the oily agent, the lubricity improver, the aromatic hydrocarbon, and the extreme pressure agent is 0.1 to 50%.
When the total content is less than 0.1%, the above-described lubricity improvement effect by the oil agent, the lubricity improver, the aromatic hydrocarbon, and the extreme pressure agent cannot be sufficiently obtained. On the other hand, if the total content exceeds 50%, it may be difficult to remove the aluminum pipe drawing lubricant after the drawing process, or a process such as degreasing or annealing after the drawing process. There is a possibility that the amount of residual oil increases and the surface quality of the aluminum tube is adversely affected.

  The aluminum pipe drawing lubricating oil contains the metal oil, carnauba wax, etc. described later in addition to the base oil, additives, oiliness agent, lubricity improver, aromatic hydrocarbon and extreme pressure agent. Can do.

Further, the kinematic viscosity of the aluminum pipe drawing lubricating oil at a temperature of 40 ° C. is 5 to 50000 mm ² / s.
The kinematic viscosity can be measured at 40 ° C. in accordance with JIS K 2283 “Kinematic viscosity test method for crude oil and petroleum products”. For example, JIS K as a measuring instrument
Using a Cannon-Fenske viscometer (a kind of capillary viscometer) of 2839 “Glasses for Petroleum Testing”, it can be measured from the time required for a certain amount of test oil to pass through the capillary.

When the kinematic viscosity is less than 5 mm ² / s, the amount of oil introduced to the friction surface is insufficient, the lubricity of the aluminum pipe drawing lubricant is insufficient, and problems such as seizure occur during drawing. On the other hand, if the kinematic viscosity exceeds 50000 mm ² / s, it may be difficult to remove the aluminum pipe drawing lubricant after washing, for example, by washing. More preferably, the kinematic viscosity of the aluminum pipe drawing lubricant at a temperature of 40 ° C. is 3000 to 20000 mm ² / s.

In addition, when used for drawing of an aluminum tube made of a relatively soft material, the viscosity is preferably as low as possible. On the other hand, when used for drawing of an aluminum tube made of a relatively hard material, the viscosity is as high as possible. It is preferable that
In addition, the kinematic viscosity of the above-mentioned aluminum pipe drawing lubricating oil includes the types and blends of the above base oil, additives, oiliness agent, lubricity improver, aromatic hydrocarbon, extreme pressure agent, metal soap, carnauba wax, etc. It can be adjusted by changing the amount or the like.

Preferably, the aluminum pipe drawing lubricating oil further contains a metal soap and / or carnauba wax (claim 6).
The metal soap is composed of a metal and an organic acid. Therefore, when the metal soap is contained, in the aluminum tube drawing lubricating oil, the functional group of the metal soap is firmly adsorbed on the surface of the aluminum tube and can be lubricated.
When the carnauba wax is contained, the functional group of the carnauba wax is firmly adsorbed on the aluminum surface, and boundary lubricity can be given.

  The metals contained in the metal soap are Ca, Zn, Mg, Al, Pb, Co, Ni, Fe, Cu, Mn, Sn, Li, Cd, and Ba because they are commonly used industrially. Choose one. Among these, it is particularly preferable to select one of Ca, Zn, Mg, Al, and Pb because they are industrially produced in large quantities and can be used at a lower cost.

  In addition, the metal soap is known to have a monosoap with one organic acid bonded, a disoap with two organic acids, and a trisoap with three bonded depending on the valence of the metal. In the present invention, any form of metal soap can be used industrially.

  The organic acid constituting the metal soap is an aliphatic, aromatic or alicyclic organic acid having a relatively large number of carbon atoms. The organic acid has 10 to 30 carbon atoms. Among these, industrially, fatty acids having 10 to 18 carbon atoms are used. If the number of carbon atoms is 10 or less, the lubricity may be reduced, and there is a risk that the carbon cannot be used. On the other hand, if the number of carbon atoms is 19 or more, the price of the metal soap is expensive and the cost increases. May be incurred.

The disoap and trisoap may be composed of a single organic acid, or may be composed of two or more organic acids.
Further, as the impurities, it is also possible to use unreacted metal or metal soap containing a metal oxide generated in the reaction process.

  Specific examples of the metal soap include calcium caprylate, zinc caprylate, magnesium caprylate, aluminum caprylate, lead caprylate, nickel caprylate, iron caprylate, copper caprylate, manganese caprylate, tin caprylate , Lithium caprylate, cadmium caprylate, calcium pelargonate, zinc pelargonate, magnesium pelargonate, aluminum pelargonate, lead pelargonate, nickel pelargonate, iron pelargonate, copper pelargonate, manganese pelargonate, tin pelargonate, pelargon Lithium oxide, cadmium pelargonate, calcium caprate, zinc caprate, magnesium caprate, aluminum caprate, lead caprate, nickel caprate, iron caprate, copper caprate, cap Manganese phosphate, tin caprate, lithium caprate, cadmium caprate, calcium undecanoate, zinc undecanoate, magnesium undecanoate, aluminum undecanoate, lead undecanoate, nickel undecanoate, iron undecanoate, copper undecanoate, undecanoic acid Manganese, tin undecanoate, lithium undecanoate, cadmium undecanoate, calcium laurate, zinc laurate, magnesium laurate, aluminum laurate, lead laurate, nickel laurate, iron laurate, copper laurate, manganese laurate, laurin Tin oxide, lithium laurate, cadmium laurate, calcium myristate, zinc myristate, magnesium myristate, aluminum myristate, lead myristate Nickel myristate, iron myristic acid, copper myristic acid, manganese myristic acid, tin myristic acid, lithium myristic acid, cadmium myristic acid, calcium palmitate, zinc palmitate, magnesium palmitate, aluminum palmitate, lead palmitate, palmitic acid Nickel, iron palmitate, copper palmitate, manganese palmitate, tin palmitate, lithium palmitate, cadmium palmitate, calcium stearate, zinc stearate, magnesium stearate, aluminum stearate, lead stearate, nickel stearate, stearin Iron oxide, copper stearate, manganese stearate, tin stearate, lithium stearate, cadmium stearate, calcium oleate , Zinc oleate, magnesium oleate, aluminum oleate, lead oleate, nickel oleate, iron oleate, copper oleate, manganese oleate, tin oleate, lithium oleate, cadmium oleate, calcium linoleate, linole Zinc oxide, magnesium linoleate, aluminum linoleate, lead linoleate, nickel linoleate, iron linoleate, copper linoleate, manganese linoleate, tin linoleate, lithium linoleate, cadmium linoleate, calcium linolenate, zinc linolenate , Magnesium linolenate, aluminum linolenate, lead linolenate, nickel linolenate, iron linolenate, copper linolenate, manganese linolenate, tin linolenate, lithium linolenate, cadmium linolenate, etc. It is below.

Moreover, it is preferable that the total content of the metal soap and / or carnauba wax is 0.5 to 5.0%.
When the content of the metal soap and / or carnauba wax is less than 0.5%, the above effects may not be sufficiently obtained. On the other hand, when the content of the metal soap and / or carnauba wax exceeds 5.0%, the aluminum pipe drawing lubricating oil is at least partially solidified, making it difficult to supply to the aluminum pipe. There's a problem. Moreover, the solidified component may adhere to the surface of the aluminum tube, and the surface quality of the aluminum tube may be deteriorated during the drawing process.

In the aluminum pipe drawing method of the second invention, as described above, the aluminum pipe drawing lubricating oil of the first invention is supplied to the inner surface and / or the outer surface of the aluminum tube, and the aluminum tube is drawn.
In the drawing process of the aluminum tube, the aluminum tube is sent out from one side, and the aluminum tube is drawn out from the other side through a die, whereby drawing is performed, and an aluminum tube having the same cross section as the die hole shape can be obtained. In addition, for example, with the mandrel and the plug arranged on the inner surface of the aluminum tube, the aluminum tube is pulled out through the die as described above, so that not only the outer shape of the tube but also the inner diameter or the wall thickness is finished to a desired dimension. Can do.

  In the drawing method for the aluminum pipe, the drawing process is performed by supplying the aluminum pipe drawing lubricant to the inner surface and / or the outer surface of the aluminum pipe. That is, the drawing process can be performed by supplying the aluminum pipe drawing lubricant to either the inner surface or the outer surface of the aluminum tube, or both the inner surface and the outer surface. Further, the aluminum pipe drawing lubricant can be supplied to a die, a mandrel, a plug or the like.

Example 1
This example will specifically describe an example of the aluminum pipe drawing lubricant according to the present invention.
In this example, as shown in Table 1, a plurality of types of aluminum pipe drawing lubricants (samples E1 to E22) as examples of the present invention and a plurality of types of comparative examples of the present invention as shown in Table 2. Aluminum pipe drawing lubricants (Sample C1 to Sample C15) were prepared and subjected to comparative tests for various performances.

  Types and contents of base oils, types and contents of additives, types and contents of oil-based agents of the aluminum pipe drawing lubricants (samples E1 to E22 and samples C1 to C15) of the examples and comparative examples. Table 1 and Table 2 show the amount, the content of the lubricity improver, the content of the aromatic hydrocarbon, the kind and content of the extreme pressure agent, and the like.

Base oils include polyisobutylene (average molecular weight 980), polyisobutylene (average molecular weight 3700), isoparaffin (kinematic viscosity 1.3 mm ² / s at 40 ° C.), mineral oil (kinematic viscosity 300 mm ² / s at 40 ° C.). ) Was used.
In Table 1 and Table 2, polyisobutylene (average molecular weight 980) a1, polyisobutylene (average molecular weight 3700) a2, isoparaffins (kinematic viscosity 1.3 mm ² / s at a temperature of 40 ° C.) a3, mineral oil (temperature 40 the kinematic viscosity 300 mm ² / s) at ℃ indicated as a4.

As additives, N, N-cyclohexylamine ethylene oxide 2-mole adduct, 2-butyl-2ethyl-1,3-β-hydroxyethoxypropane, and di-2-ethylhexyl sulfosuccinate sodium salt were used.
In Tables 1 and 2, N, N-cyclohexylamine ethylene oxide 2 mol adduct is b1, butyl-2-ethyl-1,3-β-hydroxyethoxypropane b2, sulfosuccinic acid di-2-ethylhexyl ester sodium salt b3.

As the oily agent, lauryl alcohol, butyl stearate, oleic acid, trimethylolpropane, pentaerythritol oleic acid tetraester, and palm oil were used.
In Tables 1 and 2, lauryl alcohol was shown as c1, butyl stearate as c2, oleic acid as c3, trimethylolpropane as c4, pentaerythritol oleic acid tetraester as c5, and palm oil as c6.

Tetradecene-1 was used as the lubricity improver.
As the aromatic hydrocarbon, ethylbenzene (kinematic viscosity at a temperature of 40 ° C., 3.8 mm ² / s) was used.
As an extreme pressure agent, tolyl phosphate and dodecylphosphonic acid dimethyl ester were used.
In Tables 1 and 2, tolyl phosphate was indicated as d1, and dodecylphosphonic acid dimethyl ester as d2.
As the metal soap, zinc stearate was used.

As is known from Table 1, the aluminum pipe drawing lubricants (samples E1 to E22) of the examples of the present invention are all selected from mineral oil, unhydrogenated or hydrogenated polyisobutylene, and isoparaffin. The base oil which consists of the above, an additive, and 1 type, or 2 or more types among an oiliness agent, a lubrication improver, an aromatic hydrocarbon, and an extreme pressure agent are contained. The additive is an amine derivative, an alkylene oxide adduct of a polyhydric alcohol having a number average molecular weight of 200 or more and less than 1000 and having 3 to 6 hydroxyl groups, its hydrocarbyl ether, a polyalkylene glycol having a number average molecular weight of 120 or more and less than 1000 It consists of 1 type, or 2 or more types chosen from hydrocarbyl ether of this, a C2-C10 bihydric alcohol, and an alkyl sulfonate. The content of the additive is 0.01 to 2.0%, and the total content of the oily agent, the lubricity improver, the aromatic hydrocarbon, and the extreme pressure agent is 0.1 to 50%. It is. Further, the kinematic viscosity of the aluminum pipe drawing lubricating oil at a temperature of 40 ° C. is 5 to 50000 mm ² / s.

Next, in this example, the phase states (solid, liquid, gas) of the samples E1 to E22 and the samples C1 to C15 were confirmed visually.
The case where the said phase state is a liquid is set as the pass, and the case where it is solid and gas is set as the pass. The results are shown in Table 3 and Table 4.

Next, the kinematic viscosity at a temperature of 40 ° C. was measured for the sample whose phase state was liquid. The kinematic viscosity was measured by the above-mentioned Canon-Fenske viscosity measuring method.
Kinematic viscosity passed For 5~50000mm ² / s, to the kinematic viscosity is less than 5 mm ² / s, in the case of more than 50,000 mm ² / s and fail. The results are shown in Tables 3 and 4.

In addition, the aluminum tube was drawn using a sample whose phase state was liquid, and lubricity and aluminum powder dispersibility were evaluated. The results are shown in Table 3 and Table 4.
First, an aluminum alloy tube (material A5052, outer diameter 53.0 mm, inner diameter 35.0 mm, length about 4 m) prepared by hot extrusion was prepared. Next, among the samples (sample E1 to sample E22 and sample C1 to sample C15), the samples whose phases were liquid were respectively used, and the aluminum alloy tube was adjusted to the dimensions of an outer diameter of 45.4 mm and an inner diameter of 30.0 mm. A drawing process was performed. This drawing process was performed under the condition of a delivery-side material speed of 40 m / min.

<Lubricity>
When the lubricity of the sample is poor, seizure occurs due to poor lubrication on the surface of the aluminum alloy tube after drawing. The presence or absence of this seizure was evaluated visually. As for the lubricity, a case where no seizure is confirmed is passed (evaluation ○), and a case where seizure is confirmed is regarded as unacceptable (evaluation x). The results are shown in Table 3 and Table 4.

<Aluminum powder dispersibility>
When the aluminum powder dispersibility of the sample is poor, adhesion of aluminum powder occurs on the drawing plug after drawing. The aluminum powder dispersibility was evaluated as pass (evaluation) when the adhesion amount of the aluminum powder was less than 5 mg / piece, and rejected (evaluation x) when the adhesion amount of the aluminum powder was 5 mg / piece or more.

  Moreover, the cost at the time of using each sample industrially was evaluated. When industrially applicable, the evaluation is evaluated as “good”, and when it cannot be applied to industrial production at a high price, the evaluation is evaluated as “poor”. The results are also shown in Table 3 and Table 4.

  As is known from Table 3, Sample E1 to Sample E22 as examples showed good results in any of the items of phase state, kinematic viscosity, lubricity, aluminum powder dispersibility, and cost. Thereby, the aluminum pipe drawing lubricating oil of this invention is excellent in lubricity, and can perform a drawing process at low cost.

  Further, as is known from Table 4, since Sample C1 to Sample C9 as comparative examples do not contain additives, the adhesion of aluminum powder to the plug occurs, and the amount of adhesion of aluminum powder is 5 mg / piece. The aluminum powder dispersibility was unacceptable for the reason described above.

Sample C10 as a comparative example has a content of additive below the lower limit of the present invention, so that the adhesion of aluminum powder to the plug occurs, and the amount of aluminum powder adhesion is 5 mg / piece or more. Therefore, dispersibility of the aluminum powder was unacceptable.
Moreover, since the content of the additive exceeded the upper limit of the present invention, Sample C11 as a comparative example increased the drawing lubricant price and failed the cost.

Further, the sample C12 as a comparative example has insufficient lubricity because the total content of the additive, the oily agent, the lubricity improver, the aromatic hydrocarbon, and the extreme pressure agent is below the lower limit of the present invention. , Failed.
In addition, the sample C13 as a comparative example has a higher drawing oil price because the total content of additives, oiliness agent, lubrication improver, aromatic hydrocarbon, and extreme pressure agent exceeds the upper limit of the present invention. The cost was not acceptable.
Moreover, since sample K14 as a comparative example had a kinematic viscosity below the lower limit of the present invention, the lubricity of the aluminum pipe drawing lubricating oil was insufficient, and the lubricity was unacceptable.
Moreover, since sample C15 as a comparative example exceeded kinematic viscosity in the upper limit of this invention, the phase state was semi-solid and it was disqualified.

Claims (7)

An aluminum pipe drawing lubricant used for drawing of an aluminum pipe,
The aluminum pipe drawing lubricating oil includes a base oil comprising at least one selected from mineral oil, non-hydrogenated or hydrogenated polyisobutylene, and isoparaffin, an additive, an oily agent, a lubricant improver, and an aromatic hydrocarbon. , And one or more of extreme pressure agents,
The additive is an amine derivative, an alkylene oxide adduct of a polyhydric alcohol having a number average molecular weight of 200 or more and less than 1000 and having 3 to 6 hydroxyl groups, its hydrocarbyl ether, a polyalkylene glycol having a number average molecular weight of 120 or more and less than 1000 Consisting of one or more selected from hydrocarbyl ethers, dihydric alcohols having 2 to 10 carbon atoms, and alkyl sulfonates,
The content of the additive is 0.01 to 2.0% (mass%, the same applies hereinafter),
The total content of the oil agent, the lubricity improver, the aromatic hydrocarbon, and the extreme pressure agent is 0.1 to 50%,
The aluminum tube drawing lubricant has a kinematic viscosity at a temperature of 40 ° C. of 5 to 50000 mm ² / s.   2. The aluminum tube according to claim 1, wherein the amine derivative is an aliphatic amine, an alkanolamine, an aliphatic polyamine, an aromatic amine, an alicyclic amine, a heterocyclic amine, or an alkylene oxide adduct thereof. Drawing lubricant.   3. The aluminum pipe drawing lubricant according to claim 1 or 2, wherein the oily agent is at least one selected from natural fats and oils, synthetic esters, fatty acid esters, fatty acids, and alcohols.   The aluminum pipe drawing lubricant according to any one of claims 1 to 3, wherein the lubricity improver is an α-olefin. 5. The aluminum pipe drawing according to claim 1, wherein the extreme pressure agent is an alkyl phosphonate ester and / or trityl phosphate represented by the following general formula (1): Lubricant.

(However, R ₁ is an alkyl group or alkenyl group having 12 to 14 carbon atoms, and R ₂ and R ₃ are alkyl groups having 1 to 4 carbon atoms.)   6. The aluminum tube drawing lubricant according to claim 1, wherein the aluminum tube drawing lubricant further contains a metal soap and / or carnauba wax.   A method for drawing an aluminum tube, wherein the aluminum tube drawing lubricant according to any one of claims 1 to 6 is supplied to an inner surface and / or an outer surface of the aluminum tube to perform drawing of the aluminum tube.