JP4257868B2 - Method for producing cold rolled oil for aluminum - Google Patents

Description

【０１０５】
【表２】

【０１０６】
また、実施例１および１０の結果から明らかな通り、基油Ａ（基油（１））の割合を増やすことによって、よりマイルドな潤滑状態の圧延条件（スリップ発生の観点からは、厳しい条件）にも対応できることが分かる。
【０１０７】
【発明の効果】
本発明の方法によれば、特定の２種の基油を混合比を変えて混合するため、種々の圧延条件に最適なアルミニウム冷間圧延油を製造することができる。
【０１０８】
具体的には、得られた圧延油は厳しい圧延条件下でもマイルドな圧延条件下でも使用でき、圧延製品の光沢値を上げかつ光沢むらの発生を抑えることができ、また臭気や作業者の肌荒れが少なく、酸化防止性能および酸化安定性にも優れている。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing cold rolled oil for forming strips (plates) or foils of aluminum (including aluminum alloys, the same shall apply hereinafter), and more specifically, a cold for aluminum that is optimal for various rolling conditions. The present invention relates to a method for producing rolling oil.
[0002]
[Prior art]
Cold rolling of aluminum is usually performed in an open system. If conventional aluminum cold rolled oil is used for rolling at high speed and under high pressure to improve productivity, a large amount of mist of rolled oil is generated in the workplace, which may cause odors and the skin of workers. The work environment may be significantly worsened by attaching to the skin and causing rough skin. Therefore, aluminum cold rolling oil is required to have a property that does not impair the working environment.
[0003]
In addition, when rolling aluminum under rolling conditions under relatively severe lubrication conditions, depending on the rolling oil used, the aluminum coating formed on the work roll may be enlarged, and thereby the surface of the aluminum plate after rolling. Gloss is reduced. Also, seizure or herringbone may occur on the aluminum.
[0004]
On the other hand, rolling oil that can be used even under severe lubrication conditions is accompanied by cost increases such as an increase in the content of oily agent, and when the same rolling oil is used under relatively mild lubrication conditions, the work roll and rolled material In some cases, slip occurs between them, and the aluminum plate surface after rolling may be damaged. Also, if the slip is extremely severe, the operation may be hindered. Moreover, roll coating may become non-uniform | heterogenous and uneven glossiness may be produced in the width direction of a rolling material. That is, the product after rolling needs to have a high gloss value and be free from uneven glossiness. If either of these products is inferior, it may not be shipped as a product. Therefore, there is a need for a rolling oil that can increase the gloss value of a rolled product and suppress the occurrence of uneven gloss.
[0005]
Accordingly, there is a need for a rolling oil that can be used under both severe conditions and mild conditions.
[0006]
Further, since the combined use or increase in the amount of the antioxidant increases the cost, a rolling oil having excellent antioxidant performance is required.
[0007]
Thus, various rolling properties are required for aluminum rolling oil, but it is difficult to obtain a rolling oil that satisfies all of these properties at the same time.
[0008]
For this reason, means such as using different rolling oils depending on rolling conditions, product grades, etc. can be considered. However, if rolling oils are prepared according to each case, the work for replacing the rolling oil becomes complicated and the rolling oils are changed. In many cases, it is very difficult to implement in practice, for example, the number of tanks for storing water is limited.
[0009]
In addition, for example, a rolling oil that is optimal for rolling conditions in a relatively severe lubrication state and a rolling oil that is optimal for rolling conditions in a relatively mild lubricating state are prepared. It is conceivable to cope with various rolling conditions by mixing, but sufficient results have not been obtained yet.
[0010]
In addition, rolling oil with poor oxidation stability tends to cause stains due to seizure of oil called stain on the rolled material during the annealing process after rolling, so that oxidation stability can be minimized so that the cost due to the addition of antioxidants can be minimized. There is a need for excellent oils.
[0011]
[Problems to be solved by the invention]
The object of the present invention is to improve the working environment and can be used under mild or mild rolling conditions, that is, the gloss value of the rolled product can be increased and the occurrence of uneven glossiness can be suppressed under any conditions, as well as oxidation prevention. An object of the present invention is to provide a method for producing an aluminum cold rolling oil that is excellent in performance and oxidation stability.
[0012]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors can obtain an aluminum cold rolling oil optimal for various rolling conditions by mixing two specific base oils. It has been found that the present invention has been completed.
[0013]
  That is, the present invention is a method for producing a cold rolled oil for aluminum, comprising (1) a base oil having an aromatic content of 5% by volume or less and a sulfur content of 3 mass ppm or less, and (2) an aromatic content. Is 10% by volume to 30% by volume, and a base oil having a sulfur content of 30 ppm by mass to 500 ppm by mass,Based on the base oil total amountThe base oil (1) and the base oil (2) are mixed so that the aromatic content is 1 to 20% by volume and the sulfur content is 10 to 300 ppm by mass.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be specifically described below.
The base oils used in the method for producing the cold rolled oil for aluminum of the present invention are the following two types.
(1) Base oil having an aromatic content of 5% by volume or less and a sulfur content of 3 mass ppm or less
(2) A base oil having an aromatic content of 10 to 30% by volume and a sulfur content of 30 to 500 ppm by mass
The aromatic content of the base oil of (1) is 5% by volume or less because it satisfies the working environment conditions such that the obtained rolling oil does not cause rough skin even if it adheres to the operator's skin, and the odor is weak. And is preferably 4% by volume or less, more preferably 3% by volume or less. As used herein, the term “aromatic content” means a value that is measured by applying the fluorescent indicator adsorption method of JIS K 2536 “Petroleum products-hydrocarbon type test method”.
[0015]
The naphthene content and paraffin content of the base oil (1) are not particularly limited, but the following are desirable.
Naphthene content: From the viewpoint of improving the surface gloss of aluminum after rolling, it is preferably 30% by volume or more, more preferably 40% by volume or more, and most preferably 50% by volume or more. From the viewpoint of reducing the friction coefficient at the time of high-pressure rolling at a high pressure, preferably 95 volume% or less, more preferably 90 volume% or less, and most preferably 80 volume% or less.
[0016]
Paraffin content: preferably 10% by volume or more, more preferably 15% by volume or more, and most preferably 20% by volume or more, from the viewpoint of reducing the friction coefficient at the time of rolling the aluminum under high-pressure ratio. From the viewpoint of improving the surface gloss of aluminum after rolling, it is preferably 50% by volume or less, more preferably 40% by volume or less, and most preferably 30% by volume or less.
[0017]
In the present invention, the naphthene content and the paraffin content are determined by the molecular ion intensity obtained by mass spectrometry by FI ionization (using a glass reservoir). The measurement method is specifically shown below.
[0018]
(1) An elution chromatography adsorption tube having a diameter of 18 mm and a length of 980 mm is packed with 120 g of silica gel (grade 923 manufactured by Fuji Devison Chemical Co., Ltd.) activated by drying at about 175 ° C. for 3 hours. .
(2) Inject 75 ml of n-pentane and wet the silica gel in advance.
(3) About 2 g of a sample is precisely weighed, diluted with an equal volume of n-pentane, and the obtained sample solution is injected.
(4) When the liquid level of the sample solution reaches the upper end of the silica gel, 140 ml of n-pentane is injected to separate saturated hydrocarbon components, and the eluate is recovered from the lower end of the adsorption tube.
(5) The eluate of (4) is subjected to a rotary evaporator to distill off the solvent, thereby obtaining a saturated hydrocarbon component.
The saturated hydrocarbon components obtained in (6) and (5) are subjected to type analysis with a mass spectrometer. As an ionization method in mass spectrometry, FI ionization method using a glass reservoir is used, and JMS-AX505H manufactured by JEOL Ltd. is used as a mass spectrometer.
[0019]
The measurement conditions are shown below.
Acceleration voltage: 3.0 kV
Cathode voltage: -5 to -6 kV
Resolution: about 500
Emitter: Carbon
Emitter current: 5 mA
Measuring range: Mass number 35-700
Sub Oven temperature: 300 ° C
Separator temperature: 300 ° C
Main Oven Temperature: 350 ° C
Sample injection volume: 1 μl
The molecular ions obtained by mass spectrometry of (7) (6) were subjected to isotope correction, and the paraffins (C_n H_{2n + 2}) And naphthenes (C_n H_2n, C_n H_2n-2, C_n H_2n-4...) Are classified and arranged, the fraction of each ionic strength is obtained, and the content of each type with respect to the entire saturated hydrocarbon component is determined. Next, based on the content of the saturated hydrocarbon component obtained in (5), the contents of paraffin and naphthene for the entire sample are determined.
[0020]
Details of data processing by the FI method mass spectrometry type analysis method are described in “Nisseki Review”, Vol. 33, No. 4, pages 135-142, particularly “2.2.3 Data Processing”. .
[0021]
The sulfur content of the base oil of (1) needs to be 3 mass ppm or less because it satisfies the working environment conditions such as rough skin and low odor even if it adheres to the skin of the worker. It is preferably 2 ppm by mass or less, and more preferably 1.5 ppm by mass or less. The sulfur content in the present specification means a value measured according to JIS K2541 “Crude oil and petroleum products—sulfur content test method”.
[0022]
On the other hand, the aromatic content of the base oil (2) can suppress the reduction of the surface gloss of the aluminum sheet after rolling due to the enlargement of the roll coating even under severely lubricated rolling conditions, and increases the amount of oily agent added. It is necessary to be 10% by volume or more because it is not necessary, damage to the surface of the plate after rolling due to slip between the work roll and the rolled material can be suppressed, and antioxidation performance is excellent. It is preferably at least volume%, more preferably at least 15 volume%.
[0023]
In addition, the base oil (2) needs to have an aromatic content of 30% by volume or less because it satisfies the working environment conditions such as rough skin and low odor even if it adheres to the skin of the worker. 25 volume% or less is preferable, and 23 volume% or less is more preferable.
[0024]
The naphthene content and paraffin content of the base oil (2) are not particularly limited, but the following are desirable.
Naphthene content: From the viewpoint of improving the gloss of the aluminum plate (foil) surface after rolling, it is preferably 30% by volume or more, more preferably 40% by volume or more, and most preferably 50% by volume or more. From the viewpoint of reducing the friction coefficient at the time of high pressure rolling of aluminum, it is preferably 95% by volume or less, more preferably 90% by volume or less, most preferably 80% by volume or less.
[0025]
Paraffin content: From the viewpoint of reducing the friction coefficient at the time of aluminum high-rate rolling, it is preferably 10% by volume or more, more preferably 15% by volume or more, most preferably 20% by volume or more. From the viewpoint of improving the gloss of the surface of the aluminum plate (foil) after rolling, it is preferably 60% by volume or less, more preferably 55% by volume or less, and most preferably 50% by volume or less.
[0026]
The sulfur content of the base oil (2) can suppress a decrease in surface gloss of the aluminum sheet after rolling due to enlargement of the roll coating even under severely lubricated rolling conditions, and there is no need to increase the amount of oily agent added. From the standpoint of excellent antioxidant performance, it is necessary that the content be 30 ppm by mass or more, preferably 40 ppm by mass or more, and more preferably 50 ppm by mass or more.
[0027]
In addition, the base oil (2) is required to have a sulfur content of 500 ppm by mass or less, since it satisfies the working environment conditions such as being hard to cause rough skin even if it adheres to the skin of the worker, and the odor is weak. It is preferably 450 mass ppm or less, and more preferably 400 mass ppm or less.
[0028]
If the mineral base oil which can be used as base oil (1) or (2) in this invention is illustrated, with respect to the lubricating oil fraction obtained by carrying out the atmospheric distillation and the vacuum distillation as needed, Paraffinic system obtained by applying one or two or more types of purification means in combination as appropriate, such as solvent removal, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment Or a naphthenic mineral oil can be mentioned. As base oils (1) and (2), any one of the above-described base oils may be used alone, or two or more of them may be combined.
[0029]
In the present invention, the mixing ratio of the base oil (1) and the base oil (2) is appropriately selected depending on the rolling conditions when the aluminum is actually rolled using the obtained rolling oil. When it is desired to cope with more severe rolling conditions of the lubrication state, specifically, in the case of rolling at a high pressure reduction rate, rolling of a hard material, etc., the mixing amount of the base oil (2) is increased. Conversely, if you want to handle rolling conditions with milder lubrication conditions (severe conditions from the viewpoint of slip generation), specifically, base oil for rolling at a low pressure drop, rolling soft materials, etc. Increase the mixing amount of (1).
[0030]
In addition, since the oil film between a work roll and a rolling material will become thick when a rolling speed becomes high, generally a lubrication state will become mild. However, when the rolling speed exceeds 300 m / min, there is a possibility of oil film breakage due to generation of frictional heat, and the lubrication conditions become severe.
[0031]
The properties of the mixed base oil after mixing the base oil (1) and the base oil (2) are not particularly limited, but the following are desirable.
[0032]
The aromatic content of the mixed base oil can suppress a decrease in surface gloss of the aluminum plate after rolling due to enlargement of the roll coating even under severely lubricated rolling conditions, and it is not necessary to increase the amount of oily agent added, In view of excellent antioxidant performance, it is preferably 1% by volume or more, more preferably 2% by volume or more, and even more preferably 3% by volume or more.
[0033]
In addition, the mixed base oil preferably has an aromatic content of 20% by volume or less, and 18% by volume because it satisfies the working environment conditions such as rough skin and low odor even if it adheres to the operator's skin. More preferably, it is more preferably 16% by volume or less.
[0034]
The naphthene content and paraffin content of the mixed base oil are not particularly limited, but the following are desirable.
Naphthene content: preferably 20% by volume or more, more preferably 25% by volume or more, and most preferably 30% by volume or more, from the viewpoint of improving the gloss of the aluminum plate (foil) surface after rolling. From the viewpoint of reducing the friction coefficient at the time of high-pressure rolling, it is preferably 80% by volume or less, more preferably 75% by volume or less, and most preferably 70% by volume or less.
[0035]
Paraffin content: preferably 30% by volume or more, more preferably 35% by volume or more, and most preferably 40% by volume or more, from the viewpoint of reducing the friction coefficient during high-pressure rolling. From the viewpoint of improving the gloss of the aluminum plate (foil) surface after rolling, it is preferably 75% by volume or less, more preferably 70% by volume or less, and most preferably 65% by volume or less.
[0036]
The sulfur content of the mixed base oil can suppress the decrease in surface gloss of the aluminum sheet after rolling due to the enlargement of the roll coating even under severely lubricated rolling conditions, and there is no need to increase the amount of oily agent added. From the viewpoint of excellent prevention performance, it is preferably 10 mass ppm or more, more preferably 50 mass ppm or more, and even more preferably 70 mass ppm or more.
[0037]
In addition, the mixed base oil preferably has a sulfur content of 300 ppm by mass or less, preferably 280 ppm by mass or less, because it satisfies working environment conditions such as being less likely to cause rough skin even if it adheres to the operator's skin, and having a weak odor. It is more preferable that it is 260 mass ppm or less.
[0038]
The base oil (1), base oil (2), and mixed oil thereof according to the present invention are not particularly limited in viscosity, but each has a kinematic viscosity at 40 ° C. of 1 to 10 mm.² / S in the range of 1 / s is preferred, 1-8 mm² / S in the range of 1 / s is more preferred, 1-6 mm² Those in the range of / s are more preferable. In addition, in the aluminum rolling process, when forming a so-called foil having a thickness of 0.1 mm or less as a viscosity range capable of achieving both lubricity and surface quality, 1 mm² / S or more 3mm² / S or less oil is preferable, and when forming a so-called strip exceeding 0.1 mm in thickness (0.2 mm or more), 2 mm² / S or more 6mm² / S or less is preferable.
[0039]
When the kinematic viscosity (40 ° C.) of the base oil (1), the base oil (2), or a mixed oil thereof is too low, there is a risk of increasing the risk of fire due to ignition. On the other hand, if it is too high, there is a risk that seizure of oil component called stain will occur on the surface of the rolled material during annealing, and damage called oil pits may occur on the surface of the rolled material, resulting in poor surface gloss. There is a risk of slipping due to over-lubrication, increasing the amount of wear powder, scratching the surface of the material to be rolled, and inability to work if the slip is significant.
[0040]
The rolling oil obtained by the production method of the present invention contains the above-mentioned two types of base oils, but may contain other optional additives. The mixing order of each component is arbitrary, and after adding base oil (1) and (2), an additive is added, after adding an additive to base oil (1), base oil (2) is added, Or any order of adding a base oil (1) after adding an additive to a base oil (2) may be sufficient.
[0041]
Further, the total content of the base oils (1) and (2) in this case is usually preferably 50% by mass or more, more preferably 60% by mass or more, based on the total amount of rolling oil, and 70% by mass. It is still more preferable that it is more than 80% by mass.
[0042]
For example, the rolling oil according to the present invention may contain at least one oxygen-containing compound selected from the following.
[0043]
(A1) Alkylene oxide adduct of polyhydric alcohol having a number average molecular weight of 200 or more and less than 1000 and having 3 to 6 hydroxyl groups
(A2) Hydrocarbyl ether of (A1)
(A3) Polyalkylene glycol having a number average molecular weight of 120 or more and less than 1000
(A4) Hydrocarbyl ether of (A3)
(A5) C2-C10 dihydric alcohol
Addition of such oxygen-containing compounds can withstand aluminum rolling at higher speeds and lower pressures, improve the working environment, suppress the generation of metal soap and the generation of wear powder, and generate stains Rolling oil can be obtained.
[0044]
The polyhydric alcohol constituting the component (A1) has 3 to 6 hydroxyl groups. Specific examples of such polyhydric alcohols include glycerin, polyglycerin (a dimer to tetramer of glycerin such as diglycerin, triglycerin, and tetraglycerin), trimethylol alkane (trimethylolethane, trimethylolpropane). , Trimethylolbutane and the like, and dimers and tetramers thereof, pentaerythritol, dipentaerythritol, 1,2,4-butanetriol, 1,3,5-pentanetriol, 1,2,6-hexanetriol, 1 , 2,3,4-butanetetrol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, xylitol, mannitol, idylitol, taritol, dulcitol, allitol, etc .; xylose, arabinose, Examples include saccharides such as boose, rhamnose, glucose, fructose, galactose, mannose, sorbose, cellobiose, maltose, isomaltose, trehalose, sucrose, etc. Among them, adjustment of aluminum adhesion (transfer) to the tool Glycerin, trimethylolalkane, sorbitol and the like are preferable from the viewpoint of excellent strength.
[0045]
Moreover, as alkylene oxide which comprises (A1) component, C2-C6, Preferably the thing of 2-4 is used. Specific 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 (β-butylene oxide), 1 , 2-epoxy-1-methylpropane, 1,2-epoxyheptane, and 1,2-epoxyhexane, and among them, ethylene is preferable because of its excellent ability to adjust the amount of adhesion (transfer) of aluminum to the tool. Oxide, propylene oxide and the like are preferable.
[0046]
In addition, when using 2 or more types of alkylene oxide, there is no restriction | limiting in particular in the polymerization form of an oxyalkylene group, You may carry out random copolymerization or block copolymerization. In addition, when alkylene oxide is added to a polyhydric alcohol having 3 to 6 hydroxyl groups, it may be added to all hydroxyl groups, or only to some hydroxyl groups, but aluminum condensation on the tool may be performed. An adduct added to all the hydroxyl groups is preferable from the viewpoint of excellent ability to adjust the amount of adhesion (transfer).
[0047]
Furthermore, the component (A1) used in the present invention needs to have a number average molecular weight of 200 or more and less than 1000, preferably 250 or more and less than 750. An adduct having a number average molecular weight of less than 200 is not preferable because the solubility in a base oil decreases. In addition, an adduct having a number average molecular weight of 1000 or more is not preferable because it may remain on the surface of the work material during annealing after processing and may cause stain.
[0048]
In addition, as (A1) component used by this invention, when adding an alkylene oxide to the polyhydric alcohol which has 3-6 hydroxyl groups, what was made to react so that a number average molecular weight may be 200 or more and less than 1000 is used. A mixture of a polyhydric alcohol alkylene oxide adduct having 3 to 6 hydroxyl groups obtained by an arbitrary method or a commercially available mixture of a polyhydric alcohol alkylene oxide adduct having 3 to 6 hydroxyl groups can be obtained. Alternatively, those separated by distillation or chromatography so that the number average molecular weight is 200 or more and less than 1000 may be used.
[0049]
The component (A2) according to the present invention is a hydrocarbyl etherification of an alkylene oxide adduct of a polyhydric alcohol having 3 to 6 hydroxyl groups having a number average molecular weight of 200 or more and less than 1000, preferably 250 or more and less than 750. It is a thing. As the component (A2), a hydrocarbyl etherified part or all of the terminal hydroxyl groups of the alkylene oxide adduct of the component (A1) can be used. The hydrocarbyl group mentioned here represents a hydrocarbon group having 1 to 24 carbon atoms. Specific examples of the hydrocarbon group having 1 to 24 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-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 nonyl group, 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, straight 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 Heiko An alkyl group having 1 to 24 carbon atoms such as a vinyl group, a linear or branched docosyl group, a linear or branched tricosyl group, a linear or branched tetracosyl group; a vinyl group, a linear or branched propenyl group , Linear or branched butenyl group, linear or branched pentenyl group, linear or branched hexenyl group, linear or branched heptenyl group, linear or branched octenyl group, linear or branched A branched nonenyl group, a linear or branched decenyl group, a linear or branched undecenyl group, a linear or branched dodecenyl group, a linear or branched tridecenyl group, a linear or branched tetradecenyl group, Linear or branched pentadecenyl group, linear or branched hexadecenyl group, linear or branched heptadecenyl group, linear or branched octadecenyl group, linear or branched nonadecenyl group 2 or more carbon atoms such as a linear or branched icosenyl group, a linear or branched heicosenyl group, a linear or branched dococenyl group, a linear or branched tricosenyl group, a linear or branched tetracocenyl group, etc. 24 alkenyl groups; C5-C7 cycloalkyl groups such as cyclopentyl, cyclohexyl and cycloheptyl; methylcyclopentyl, dimethylcyclopentyl (including all structural isomers), methylethylcyclopentyl (all Including structural isomers), 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), methylcycloheptyl 6 carbon atoms, such as thiol group, dimethylcycloheptyl group (including all structural isomers), methylethylcycloheptyl group (including all structural isomers), diethylcycloheptyl group (including all structural isomers), etc. Alkyl cycloalkyl group having ˜11; aryl group having 6 to 10 carbon atoms such as phenyl group, naphthyl group, etc .: tolyl group (including all structural isomers), xylyl group (including all structural isomers), ethylphenyl Groups (including all structural isomers), linear or branched propylphenyl groups (including all structural isomers), linear or branched butylphenyl groups (including all structural isomers), straight Chain or branched pentylphenyl group (including all structural isomers), straight chain or branched hexylphenyl group (including all structural isomers), straight chain or branched heptylphenyl group (all ), Linear or branched octylphenyl groups (including all structural isomers), linear or branched nonylphenyl groups (including all structural isomers), linear or branched Branched decylphenyl group (including all structural isomers), linear or branched undecylphenyl group (including all structural isomers), linear or branched dodecylphenyl group (all structural isomers) An alkylaryl group having 7 to 18 carbon atoms such as benzyl group, phenylethyl group, phenylpropyl group (including isomers of propyl group), phenylbutyl group (including isomers of butyl group), phenylpentyl And arylalkyl groups having 7 to 12 carbon atoms such as a group (including an isomer of a pentyl group) and a phenylhexyl group (including an isomer of a hexyl group). Among these, a linear or branched alkyl group having 3 to 12 carbon atoms is preferable from the viewpoint of excellent adjustment of the amount of aluminum adhesion (transfer) to the tool.
[0050]
The component (A3) is a polyalkylene glycol having a number average molecular weight of 120 or more and less than 1000, and one obtained by homopolymerizing or copolymerizing an alkylene oxide having 2 to 6 carbon atoms, preferably 2 to 4 carbon atoms. Specific examples of the alkylene oxide having 2 to 6 carbon atoms include those listed as alkylene oxides constituting the component (A1). Among these, ethylene oxide, propylene oxide, and the like are preferable from the viewpoint of excellent adjustment of the amount of aluminum adhesion (transfer) to the tool.
[0051]
In addition, when using 2 or more types of alkylene oxide for preparation of polyalkylene glycol, there is no restriction | limiting in particular in the polymerization form of an oxyalkylene group, You may carry out random copolymerization or block copolymerization.
[0052]
Further, the component (A3) needs to have a number average molecular weight of 120 or more and less than 1000, preferably 120 or more and less than 500. A polyalkylene glycol having a number average molecular weight of less than 120 is not preferable because the solubility in a base oil is lowered. Further, polyalkylene glycol having a number average molecular weight of 1000 or more is not preferred because it may remain on the surface of the workpiece during the annealing after processing and may cause stain.
[0053]
In addition, as (A3) component, when making an alkylene oxide superpose | polymerize, you may use what was made to react so that a number average molecular weight may be 120 or more and less than 1000, or the polyalkylene glycol mixture obtained by arbitrary methods, A commercially available polyalkylene glycol mixture separated by distillation or chromatography so that the number average molecular weight is 120 or more and less than 1000 may be used.
[0054]
The component (A4) is obtained by hydrocarbyl etherifying a polyalkylene glycol having a number average molecular weight of 120 or more and less than 1000, preferably 120 or more and less than 500. As the component (A4), a hydrocarbyl etherified part or all of the terminal hydroxyl groups of the polyalkylene glycol of the component (A3) can be used. The hydrocarbyl group as used herein represents a hydrocarbon group having 1 to 24 carbon atoms, and specifically includes, for example, each group listed in the description of (A2). Among these, a linear or branched alkyl group having 3 to 12 carbon atoms is preferable from the viewpoint of excellent adjustment of the amount of aluminum adhesion (transfer) to the tool.
[0055]
The component (A5) is a dihydric alcohol having 2 to 10 carbon atoms, preferably 5 or 6 carbon atoms. The dihydric alcohol referred to here is one having no ether bond in the molecule. Specific examples of such dihydric alcohols having 2 to 10 carbon atoms include ethylene glycol, 1,3-propanediol, propylene glycol, 1,4-butanediol, 1,2-butanediol, 2- Methyl-1,3-propanediol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 2-ethyl-2-methyl-1,3-propanediol, 2-methyl-2,4- Pentanediol, 1,7-heptanediol, 2-methyl-2-propyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, 1,8-octanediol, 1,9-nonane Examples include diol, 2-butyl-2-ethyl-1,3-propanediol, and 1,10-decanediol. Among these, 1,5-pentanediol, neopentylglycol, 1,6-hexanediol, 2-methyl-2,4-pentanediol are excellent in the ability to adjust the amount of aluminum adhesion (transfer) to the tool. 2-ethyl-2-methyl-1,3-propanediol and the like are preferable.
[0056]
In the present invention, one oxygen-containing compound selected from the above (A1), (A2), (A3), (A4) and (A5) may be used alone, or two kinds having different structures You may use the mixture of the above oxygen-containing compounds.
[0057]
In the present invention, the content of the oxygen-containing compound is not particularly limited, but the upper limit of the content (total amount) based on the total amount of rolling oil is preferably 2% by mass, and 1.5% by mass. More preferably, the lower limit is preferably 0.01% by mass, and more preferably 0.03% by mass. If the oxygen-containing compound exceeds 2% by mass, the solubility in the base oil may decrease, or the performance as a rolling oil may be adversely affected. In addition, an oxygen-containing compound that is less than 0.01% by mass may reduce the effect of adjusting the amount of aluminum adhesion (transfer) to the tool.
[0058]
The rolling oil according to the present invention may contain an oily agent. The oily agent used in the present invention includes those usually used as an oily agent for rolling oil. However, it is preferable to use at least one oily agent selected from the following in order to further improve processability.
[0059]
(1) Esters
(2) Monohydric alcohol
(3) Carboxylic acid
As the above (1) ester, the constituent alcohol may be a monohydric alcohol or a polyhydric alcohol, and the carboxylic acid may be a monobasic acid or a polybasic acid.
[0060]
As the monohydric alcohol, one having 1 to 24 carbon atoms is usually used, and such an alcohol may be linear or branched. Specific examples of the alcohol having 1 to 24 carbon atoms include methanol, ethanol, linear or branched propanol, linear or branched butanol, linear or branched octanol, and linear Or branched nonanol, linear or branched decanol, linear or branched undecanol, linear or branched dodecanol, linear or branched tridecanol, linear or branched tetra Decanol, linear or branched pentadecanol, linear or branched hexadecanol, linear or branched heptadecanol, linear or branched octadecanol, linear Or branched nonadecanol, linear or branched eicosanol, linear or branched heneicosanol, linear or branched Of Torikosanoru, it includes straight chain or branched tetracosanol, and mixtures thereof.
[0061]
As the polyhydric alcohol, those having 2 to 10 valences, preferably 2 to 6 valences are usually used. Specific examples of the 2 to 10 valent polyhydric alcohol include, for example, ethylene glycol, diethylene glycol, polyethylene glycol (3 to 15 mer of ethylene glycol), propylene glycol, dipropylene glycol, and polypropylene glycol (3 to 15 of propylene glycol). Monomer), 1,3-propanediol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 2-methyl-1,3 -Dihydric alcohols such as propanediol, 1,2-pentanediol, 1,3-pentanediol, 1,4-pentanediol, 1,5-pentanediol, neopentylglycol; glycerin, polyglycerin (glycerin 2- Octamers such as diglycerin, triglyceride Phosphorus, tetraglycerin), trimethylolalkanes (trimethylolethane, trimethylolpropane, trimethylolbutane, etc.) and their 2- to 8-mer, pentaerythritol and their 2- to 4-mer, 1,2,4-butane Triol, 1,3,5-pentanetriol, 1,2,6-hexanetriol, 1,2,3,4-butanetetrol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, xylitol, mannitol, etc. Polyhydric alcohols; sugars such as xylose, arabinose, ribose, rhamnose, glucose, fructose, galactose, mannose, sorbose, cellobiose, maltose, isomaltose, trehalose, sucrose, and mixtures thereof And the like.
[0062]
Among these, ethylene glycol, diethylene glycol, polyethylene glycol (ethylene glycol 3-10 mer), propylene glycol, dipropylene glycol, polypropylene glycol (propylene glycol 3-10 mer), 1,3-propanediol, 2-methyl-1,2-propanediol, 2-methyl-1,3-propanediol, neopentyl glycol, glycerin, diglycerin, triglycerin, trimethylolalkane (trimethylolethane, trimethylolpropane, trimethylolbutane, etc. ) And their 2-4 tetramers, pentaerythritol, dipentaerythritol, 1,2,4-butanetriol, 1,3,5-pentanetriol, 1,2,6-hexanetriol, 1, , 3,4 butane tetrol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, xylitol, divalent to hexavalent polyhydric alcohols, and mixtures thereof such as mannitol and the like are more preferable. More preferred are ethylene glycol, propylene glycol, neopentyl glycol, glycerin, trimethylol ethane, trimethylol propane, pentaerythritol, sorbitan, and mixtures thereof.
[0063]
The monobasic acid constituting the ester oily agent that can be used in the present invention is usually a fatty acid having 6 to 24 carbon atoms, which may be linear or branched, and may be saturated or unsaturated. Specifically, for example, linear or branched hexanoic acid, linear or branched octanoic acid, linear or branched nonanoic acid, linear or branched decanoic acid, linear or Branched undecanoic 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, linear or branched octadecanoic acid, linear or branched hydroxyoctadecanoic acid, linear or branched nonadecanoic acid, linear or branched eicosanoic acid, linear Or saturated fatty acids such as branched heneicosanoic acid, linear or branched docosanoic acid, linear or branched tricosanoic acid, linear or branched tetracosanoic acid; 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 octadecenoic acid, linear or branched hydroxyoctadecenoic acid, linear or branched nonadecenoic acid, linear or branched eicosenoic acid, linear Unsaturated fatty acids such as linear or branched hecoecoic acid, linear or branched docosenoic acid, linear or branched tricosenoic acid, linear or branched tetracosenoic acid, and And mixtures thereof. Of these, saturated fatty acids having 8 to 20 carbon atoms, unsaturated fatty acids having 8 to 20 carbon atoms, and mixtures thereof are particularly preferable.
[0064]
Examples of the polybasic acid constituting the ester oil-based 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 saturated or unsaturated. Specifically, for example, ethanedioic acid, propanedioic acid, linear or branched butanedioic acid, linear or branched pentanedioic acid, linear or branched hexanedioic acid, linear Or branched octanedioic acid, linear or branched nonanedioic acid, linear or branched decanedioic acid, linear or branched undecanedioic acid, linear or branched dodecanedioic acid Acid, linear or branched tridecanedioic acid, linear or branched tetradecanedioic acid, linear or branched heptadecanedioic acid, linear or branched hexadecanedioic acid; linear or Branched hexenedioic acid, linear or branched octenedioic acid, linear or branched nonenedioic acid, linear or branched decenedioic acid, linear or branched undecenedioic acid , Linear or branched dodecenedioic acid, straight Include and mixtures thereof; Jo or branched tridecenoic acid, straight-chain or branched tetradecene diacid, linear or branched heptadecenoic acid, straight-chain or branched hexadecene diacid.
[0065]
In addition, as an ester oily agent,
(1) Esters of monohydric alcohols and monobasic acids
(2) Esters of polyhydric alcohols and monobasic acids
(3) Esters of monohydric alcohols and polybasic acids
(4) Esters of polyhydric alcohols and polybasic acids
(5) Monohydric alcohol, mixed ester of polyhydric alcohol and mixed ester of polybasic acid
(6) Mixed ester of polyhydric alcohol with monobasic acid and polybasic acid
(7) Mixed esters of monohydric alcohols and mixtures of polyhydric alcohols with mixtures of monobasic acids and polybasic acids
Ester by the combination of arbitrary alcohol and carboxylic acid can be used, and is not specifically limited.
[0066]
When a polyhydric alcohol is used as the alcohol component, a complete ester in which all the hydroxyl groups in the polyhydric alcohol are esterified may be used, or a partial ester in which a part of the hydroxyl groups is not esterified and remains as a hydroxyl group may be used. . Further, when a polybasic acid is used as the carboxylic acid component, it may be a complete ester in which all the carboxyl groups in the polybasic acid are esterified, and a part of the carboxyl group is not esterified and remains as a carboxyl group. It may be a partial ester.
[0067]
As the ester used in the present invention, any of the above-mentioned esters can be used. Among them, (1) an ester of a monohydric alcohol and a monobasic acid is preferable from the viewpoint of excellent processability.
[0068]
The total carbon number of the ester used as the oily agent in the present invention is not particularly limited, but an ester having a total carbon number of 7 or more is preferable, and an ester of 9 or more is more preferable, from the viewpoint of excellent workability improvement effect. The above esters are most preferred. Moreover, since there exists a possibility that the generation | occurrence | production of a stain and corrosion will increase when there are too many carbon numbers, ester with a total carbon number of 26 or less is preferable, ester of 24 or less is more preferable, and ester of 22 or less is the most preferable.
[0069]
Examples of the (2) monohydric alcohol used as the oily agent include compounds listed as alcohols constituting the (1) ester. From the viewpoint of better processability, monohydric alcohols having 6 or more carbon atoms are preferable, alcohols having 8 or more carbon atoms are more preferable, and alcohols having 10 or more carbon atoms are most preferable. Moreover, since possibility that the generation | occurrence | production of stain and corrosion will increase will become large when carbon number is too large, C20 or less alcohol is preferable, C18 or less alcohol is more preferable, C16 or less alcohol is preferable. Most preferred.
[0070]
The (3) carboxylic acid may be a monobasic acid or a polybasic acid. Specific examples include the compounds listed as the carboxylic acid constituting the above (1) ester. Among these, a monovalent carboxylic acid is preferable from the viewpoint of excellent workability. Moreover, from the point which is more excellent in workability, a C6 or more carboxylic acid is preferable, a C8 or more carboxylic acid is more preferable, and a C10 or more carboxylic acid is the most preferable. Moreover, since possibility that the generation | occurrence | production of a stain and corrosion will increase will become large when carbon number is too large, a C20 or less carboxylic acid is preferable, a C18 or less carboxylic acid is more preferable, and a C16 or less carbonic acid is preferable. Carboxylic acid is most preferred.
[0071]
As the oily agent of the rolling oil according to the present invention, only one kind selected from the various oily agents as described above may be used, or a mixture of two or more kinds may be used. (1) an ester having 7 to 26 total carbon atoms obtained from a monohydric alcohol and a monobasic acid, (2) a monohydric alcohol having 6 to 20 carbon atoms, and (3) a carbon atom having 6 to 20 carbon atoms. Monobasic acids and mixtures thereof are preferred.
[0072]
Although the total content of the oily agent is not particularly limited, it is preferably 0.1 to 15% by mass based on the total amount of rolling oil. From the viewpoint of workability, the lower limit of the content is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and still more preferably 0.5% by mass or more. Moreover, when there is too much content, generation | occurrence | production of a stain and corrosion may be increased, and the upper limit of content is 15 mass% or less from the point of becoming a cause of slip and gloss unevenness etc. More preferably, it is 12 mass% or less, More preferably, it is 10 mass% or less.
[0073]
The rolling oil according to the present invention has a kinematic viscosity at 40 ° C. of 1 to 60 mm.² / S alkylbenzene may be blended. By using alkylbenzene and an oily agent in combination, the effect of adding the oily agent can be further increased.
[0074]
The kinematic viscosity at 40 ° C. of the alkylbenzene used in the present invention is 1 to 60 mm.² / S is preferable. Kinematic viscosity at 40 ° C is 1mm² If it is less than / s, the additive effect may not be expected. The kinematic viscosity at 40 ° C. is 60 mm.² If it exceeds / s, there is a possibility of increasing the occurrence of stains and corrosion, preferably 40 mm² / S or less, more preferably 20 mm² / S or less.
[0075]
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, A C1-C40 alkyl group is preferable.
[0076]
Specific examples of the alkyl group having 1 to 40 carbon atoms include a methyl group, an ethyl group, a linear or branched propyl group, a linear or branched butyl group, a linear or branched group. 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, 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 hexadecyl group, linear or branched heptadecyl group, linear or branched octadecyl group, linear or branched nonadecyl group, linear or branched Ikosil A linear or branched heicosyl group, a linear or branched docosyl group, a linear or branched tricosyl group, a linear or branched tetracosyl group, a 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 pentatriacontyl group, linear or branched hexatriacontyl group, linear or branched heptatriacontyl group, linear or branched The branched oct triacontyl group, straight or branched nonadecyl triacontyl group include linear or branched tetracontyl group.
[0077]
The number of alkyl groups in the 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 a mixture thereof is used. Most preferably used.
[0078]
Of course, the alkylbenzene to be used may be not only a single structure alkylbenzene but also a mixture of alkylbenzenes having different structures.
[0079]
The number average molecular weight of the alkylbenzene according to the present invention is not limited at all, but is preferably 100 or more and more preferably 130 or more from the viewpoint of the effect of addition. Further, if the molecular weight is too large, the possibility of increasing the occurrence of stain or corrosion increases, so the upper limit of the number average molecular weight is preferably 340 or less, more preferably 320 or less.
[0080]
Any conventional method can be applied to the method for producing the alkylbenzene, and it is not limited at all. For example, the alkylbenzene can be produced by an alkylation synthesis method using the following substances.
[0081]
Specific examples of the aromatic compound used as the raw material include benzene, toluene, xylene, ethylbenzene, methylethylbenzene, diethylbenzene, and mixtures thereof. The alkylating agent is specifically a lower monoolefin such as ethylene, propylene, butene and isobutylene, preferably a linear or branched olefin having 6 to 40 carbon atoms obtained by polymerization of propylene; Linear or branched olefins having 6 to 40 carbon atoms obtained by thermal decomposition of wax, heavy oil, petroleum fraction, polyethylene, polypropylene, etc .; n-paraffins are separated from petroleum fractions such as kerosene and light oil , Linear olefins having 9 to 40 carbon atoms obtained by olefination with a catalyst; and mixtures thereof.
[0082]
In addition, as the alkylation catalyst in the alkylation, Friedel-Crafts type catalysts such as aluminum chloride and zinc chloride; acidic catalysts such as sulfuric acid, phosphoric acid, silicotungstic acid, hydrofluoric acid and activated clay; A catalyst is used.
[0083]
Kinematic viscosity at 40 ° C is 1-60mm² / S alkylbenzene is prepared by, for example, separating an alkylbenzene mixture obtained by the method exemplified above or a commercially available alkylbenzene mixture by distillation or chromatography, and a kinematic viscosity is 1 to 60 mm.² It is practically convenient to obtain an alkylbenzene fraction of / s.
[0084]
The rolling oil according to the present invention can contain 0.1 to 50% by mass of the above-described alkylbenzene based on the total amount of rolling oil. 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. Moreover, since possibility that the generation | occurrence | production of a stain and corrosion will increase when there is too much content, upper limit is preferable 50 mass% or less, More preferably, it is 40 mass% or less, More preferably, it is 30 mass% or less. is there.
[0085]
In order to further improve the excellent effect of the rolling oil according to the present invention, if necessary, an extreme pressure additive, an antioxidant, a rust inhibitor, a corrosion inhibitor, an antifoaming agent, etc. are further singly used. Or you may add in combination of 2 or more types.
[0086]
Examples of the extreme pressure additive include phosphorus compounds such as tricresyl phosphate and organometallic compounds such as zinc dialkyldithiophosphate.
[0087]
Examples of the antioxidant include phenolic compounds such as 2,6-ditertiary butyl-p-cresol (DBPC), aromatic amines such as phenyl-α-naphthylamine, and organometallic compounds such as zinc dialkyldithiophosphate. .
[0088]
Examples of rust inhibitors include salts of fatty acids such as oleic acid, sulfonates such as dinonylnaphthalene sulfonate, partial esters of polyhydric alcohols such as sorbitan monooleate, amines and derivatives thereof, phosphate esters and derivatives thereof it can.
Examples of the corrosion inhibitor include benzotriazole.
Examples of antifoaming agents include silicon-based ones.
The total content of these additives is usually 15% by mass or less, preferably 10% by mass or less (both based on the total amount of rolling oil).
[0089]
The rolling oil obtained by mixing the base oil (1) and the base oil (2) according to the present invention with additives as necessary has no particular limitation in the viscosity, but the kinematic viscosity at 40 ° C. is 1 -10mm² / S in the range of 1 / s is preferred, 1-8 mm² / S in the range of 1 / s is more preferred, 1-6 mm² Those in the range of / s are more preferable. In addition, in the aluminum rolling process, when forming a so-called foil having a thickness of 0.1 mm or less as a viscosity range capable of achieving both lubricity and surface quality, 1 mm² / S or more 3mm² / S or less rolling oil is preferable, and when forming a so-called strip having a thickness exceeding 0.1 mm (0.2 mm or more), 2 mm² / S or more 6mm² / S or less is preferable.
[0090]
If the kinematic viscosity (40 ° C.) of the rolling oil is too low, there is a risk of increasing the risk of fire and the like due to ignition. On the other hand, if it is too high, there is a risk that seizure of the rolling oil component called stain will easily occur on the surface of the workpiece during annealing, and damage called oil pits will occur on the workpiece surface, resulting in poor surface gloss. There is a risk of slipping due to over-lubrication, increasing the amount of wear powder generated, scratching the surface of the workpiece, or inability to work if the slip is significant.
[0091]
The rolling oil produced by the method of the present invention is used for cold rolling of aluminum and aluminum alloys, but also for rolling various metals such as steel, stainless steel, special steel, copper, and alloys of these metals. Can be used.
[0092]
The rolling oil according to the present invention exhibits an excellent effect when used mainly in cold rolling, but can be used for general plastic processing such as drawing, ironing, drawing, and pressing. Furthermore, it can be used for cutting, grinding, and the like other than plastic processing.
[0093]
【Example】
Hereinafter, the contents of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these.
Examples 1-10 and Comparative Examples 1-7
Various rolling oils having the following composition were prepared, and various tests were performed on these by the methods shown below. The test results are shown in Tables 1 and 2.
[0094]
Rolling oil(Mass% of base oil A and base oil B is based on the total amount of mixed base oil, and other mass% is based on the total amount of rolling oil)
Example 1: 60% by mass of base oil A + 40% by mass of base oil B + mixed oil agent A
Example 2: Base oil A 60 mass% + base oil B 40 mass% + mixed oil agent B
Example 3: 70% by mass of base oil A + 30% by mass of base oil B + mixed oil agent A
Example 4: Rolling oil of Example 1 + alkylbenzene (kinematic viscosity 8.3 mm²/ S @ 40 ° C) 5% by mass
Example 5: Rolling oil of Example 1 + polyethylene glycol monostearate 0.5 mass% (average number of polymerization of oxyethylene group n = 25)
Example 6: Rolling oil of Example 1 + polyethylene glycol monononyl phenyl ether 0.5% by mass (average number of polymerization of oxyethylene group n = 25)
Example 7: Rolling oil of Example 1 + polyethylene glycol monolauryl ether 0.5% by mass (average number of polymerization of oxyethylene group n = 25)
Example 8: Rolling oil of Example 1 + 0.5% by mass of tripropylene glycol
Example 9: Rolling oil of Example 1 + 0.5% by mass of hexylene glycol
Example 10: Base oil A 80 mass% + base oil B 20 mass% + mixed oil agent A
Comparative Example 1: 100% by mass of base oil A + mixed oil agent A
Comparative Example 2: 100% by mass of base oil A + mixed oil agent B
Comparative Example 3: 100% by mass of base oil B + mixed oil agent A
Comparative Example 4: 100% by mass of base oil A + mixed oil agent C
[0095]
Base oil
A: Aromatic content 0.5 vol%, sulfur content 1.2 mass ppm, paraffin content 28.5 vol%, naphthene content 71 vol%, kinematic viscosity 2.58 mm² / S @ 40 ℃
B: Aromatic content 18 vol%, sulfur content 348 mass ppm, paraffin content 36 vol%, naphthene content 46 vol%, kinematic viscosity 2.49 mm² / S @ 40 ℃
[0096]
Mixed oil agent(Mass% is based on the total amount of rolling oil):
A: 7% by mass of lauryl alcohol + 1.5% by mass of butyl stearate + 0.05% by mass of oleic acid
B: 2% by mass of lauryl alcohol + 1.0% by mass of butyl stearate + 0.05% by mass of oleic acid
C: 10% by mass of lauryl alcohol + 2.5% by mass of butyl stearate + 0.05% by mass of oleic acid
[0097]
Limit rolling reduction test
Material A: JIS A1050, 0.5 mm thickness
Material B: JIS 1N30 H18, 0.1 mm thickness
Work roll: 51 mm in diameter, surface roughness: Ra = 0.04 μm
Rolling speed: 30m / min
Reduction ratio% = 100 × (initial thickness of material−remaining thickness of rolled material) / initial thickness of material
Each rolling oil can be used to roll material A or B between two work rolls, gradually increasing the rolling reduction from 45%, without causing seizure or herringbone damage on the material surface. The maximum reduction rate was determined.
[0098]
Slip test
Material C: JIS A5182, 1.0 mm thickness
Work roll: 51 mm in diameter, surface roughness: Ra = 0.04 μm
Rolling speed: 30 m / min, rolling reduction: 40%
Advanced rate% = 100 × (Exit side plate speed−Work roll peripheral speed) / Work roll peripheral speed
Material C was rolled using each rolling oil in an atmosphere of a temperature of 27 ° C. and a humidity of 49%, and the degree of slip generated between the work roll and the material at that time was determined by measuring the advanced rate. When the advance rate is negative, it indicates that a slip has occurred.
[0099]
However, only the rolling oil of Example 10 (in which the mixing ratio of the base oil was changed as compared with Example 1) was tested at a high rolling speed of 70 m / min.
[0100]
Stain test
J. et al. Inst. Metals. , 88, 481 (1959), 0.1 ml of each rolling oil (the filtrate obtained by passing the rolling oil after the slip test through a filter having a pore diameter of 1 μm) was dropped into an aluminum cup, The temperature was raised from room temperature to 350 ° C. over 150 minutes, and after further maintaining at 350 ° C. for 60 minutes, the product was taken out and visually evaluated for the occurrence of stain on the inner surface of the cup. Evaluation was as follows: 1: No stain, 2: Slightly, 3: Small, 4: Medium, 5: Large, and the average value was obtained in 5 tests. An average value of less than 1.5 was evaluated as ◎, 1.5 or more and less than 2.5 as ◯, 2.5 or more and less than 3.5 as Δ, and 3.5 or more as ×.
[0101]
Oxidation stability test
The oxidation stability of each rolling oil was determined by JIS K2514 “Rotating cylinder type oxidation stability test”. The results are shown as RBOT values.
[0102]
Odor determination test
30 g of each of the rolling oils of Examples 1, 3 and 10 and Comparative Examples 1 and 3 were collected in a 100 mL screw bottle without containing an oily agent, heated in a water bath at 40 ° C. for 30 minutes, and then smelled by 20 people. Judgment was made. I am very interested (5 points), anxious (4 points), somewhat anxious (3 points), hardly anxious (2 points), and anxious (1 point). An average score of less than 2.5 points was evaluated as ◯, and a score of 2.5 points or more was evaluated as ×, which was determined as odor.
[0103]
Rough skin test
Commercially available patch test adhesive bandages were impregnated with 0.3 mL of each rolling oil of Examples 1, 3 and 10 and Comparative Examples 1 and 3 without containing an oily agent, and this was applied to 5 locations on the inner side of the upper arm. After the time, the condition of the peeled skin was visually observed. The number of subjects was 20, and points were assigned in three stages: red (3 points), faintly red (2 points), and no change (1 point), and the average score was 1 point. Two or more points were judged as x.
[0104]
[Table 1]

[0105]
[Table 2]

[0106]
Further, as is clear from the results of Examples 1 and 10, the rolling condition in a milder lubrication state (strict condition from the viewpoint of occurrence of slip) is increased by increasing the ratio of base oil A (base oil (1)). You can see that
[0107]
【The invention's effect】
According to the method of the present invention, since two specific types of base oils are mixed at different mixing ratios, it is possible to produce aluminum cold rolling oil that is optimal for various rolling conditions.
[0108]
Specifically, the obtained rolling oil can be used under severe rolling conditions or mild rolling conditions, and can increase the gloss value of rolled products and suppress the occurrence of uneven glossiness. The oxidation resistance and oxidation stability are excellent.

Claims (1)

A method for producing cold rolled oil for aluminum, comprising: (1) a base oil having an aromatic content of 5% by volume or less and a sulfur content of 3 mass ppm or less; and (2) an aromatic content of 10% by volume to 30%. A base oil having a capacity of not more than% and a sulfur content of not less than 30 ppm and not more than 500 ppm, based on the total amount of the base oil, an aromatic content of not less than 1% and not more than 20%, and a sulfur content of not less than 10 ppm and not more than 300 ppm A base oil (1) and a base oil (2) are mixed within a range of