EP4196558B1 - Lubrifiant de refroidissement pour laminage à froid de l'aluminium - Google Patents

Lubrifiant de refroidissement pour laminage à froid de l'aluminium Download PDF

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Publication number
EP4196558B1
EP4196558B1 EP21762692.8A EP21762692A EP4196558B1 EP 4196558 B1 EP4196558 B1 EP 4196558B1 EP 21762692 A EP21762692 A EP 21762692A EP 4196558 B1 EP4196558 B1 EP 4196558B1
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EP
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Prior art keywords
cooling lubricant
aluminum
rolling
mass
fatty
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EP21762692.8A
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German (de)
English (en)
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EP4196558A1 (fr
EP4196558C0 (fr
Inventor
Stephan Draese
Thomas Graf
Oliver Seiferth
Volker Schmitz
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Speira GmbH
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Speira GmbH
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/34—Polyoxyalkylenes of two or more specified different types
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/28—Polyoxyalkylenes of alkylene oxides containing 2 carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/30—Polyoxyalkylenes of alkylene oxides containing 3 carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/32—Polyoxyalkylenes of alkylene oxides containing 4 or more carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/36—Polyoxyalkylenes etherified
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/041—Mixtures of base-materials and additives the additives being macromolecular compounds only
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/108—Polyethers, i.e. containing di- or higher polyoxyalkylene groups etherified
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/09—Characteristics associated with water
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/09—Characteristics associated with water
    • C10N2020/093—Insolubility in water
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/24—Emulsion properties
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/40—Low content or no content compositions
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/24—Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/243—Cold working
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/244—Metal working of specific metals
    • C10N2040/245—Soft metals, e.g. aluminum

Definitions

  • the invention relates to a cooling lubricant (rolling oil) for the cold rolling of aluminum, a process for producing an aluminum product free of visually visible defects caused by fatty acids, and the use of the cooling lubricant for rolling aluminum.
  • rolling emulsions and rolling oils are used as cooling lubricants, which have a major influence on the economic efficiency of production and the quality of the products.
  • the coefficient of friction between the work roll and the rolling stock should be neither too high nor too low.
  • a low coefficient of friction improves lubrication in the roll gap, so that energy consumption, frictional heat and roll wear are reduced in the rolling process.
  • Aluminium strips and foils are usually produced by rolling in a two-stage rolling process.
  • an aluminium ingot is first rolled in several passes (passes) in a so-called hot rolling mill to form a blank or strip. This is then subjected to cold rolling to form a thinner strip or foil.
  • the strip or foil can undergo other known treatment processes (annealing, thermal or chemical degreasing).
  • a rolling emulsion (O/W) is usually used as a cooling lubricant and during cold rolling, a rolling oil is used.
  • O/W rolling emulsion
  • the aluminum ingot is extensively formed into an aluminum strip.
  • hydrocarbon-based rolling oils are used as cooling lubricants.
  • Lubricating additives can be added to these rolling oils.
  • Common lubricating additives include fatty alcohols, fatty acids and fatty acid esters.
  • fatty acids that are regularly used such as lauric acid, myristic acid, palmitic acid or stearic acid
  • the fatty acids that are regularly used are solid at temperatures below 40 °C and only evaporate at temperatures well above 300 °C.
  • solid or pasty deposits of fatty acids and the metal soaps formed from them can therefore form after the more volatile rolling oil has evaporated. If these solid or pasty deposits detach from the rolling mill or pipes and get onto the aluminum strip or aluminum foil, visually visible defects can arise on the rolled material that cannot be eliminated by the following process steps (further rolling passes, roll cutting, thermal or chemical degreasing).
  • a fatty acid as a lubricating additive is that it can react with the components of the rolling stock, particularly with the rolling dust formed during forming. This can result in the formation of metal soaps, mainly aluminum soaps. Fatty alcohols can also react with aluminum dust to form aluminum soaps after the alcohol has been oxidized to acid.
  • the aluminum soaps formed from the fatty acids and aluminum abrasion have only a limited and low solubility in the cold rolling oil. In addition, they form agglomerates with the aluminum abrasion particles. These poorly soluble metal soaps and the metal soaps/metal abrasion agglomerates are stored settle on the components of the cold rolling mill and can form the deposits mentioned in pipes and tanks.
  • metal soaps or metal soap/metal abrasion agglomerates detach from components of the rolling mill, cold rolling mill or pipe walls and get onto the aluminum strip or aluminum foil, this can also lead to visually visible defects on the rolled material that can no longer be eliminated by the subsequent process steps to finish the strip or foil.
  • Filters such as horizontal pressure plate filters and filter aids such as diatomaceous earth, perlite and bleaching earth can be used for this purpose.
  • Increasing soap content in the rolling oil is counteracted by increasing the use of bleaching earth filter aids. However, this shortens the filter service life and increases both the amount of filter aid required and the amount of filter waste generated.
  • the EP 3 124 583 A1 describes a water-soluble metalworking fluid containing a dicarboxylic acid with a sulfide structure, a polyalkylene glycol, a polyhydric alcohol/polyalkylene oxide adduct and a monocarboxylic acid. This describes a water-soluble and not a mineral oil-based composition.
  • the EP 0 484 542 A1 describes a lubricant for metalworking that contains a mineral oil and a straight-chain olefin as well as a fatty alcohol or a fatty acid.
  • the lubricant described therein may also contain glycols.
  • the example compositions in this document do not contain glycols.
  • the disadvantage of olefins in lubricants is that they lead to high levels of annealing residue on aluminum sheets after the aluminum strip has been annealed.
  • the EP 3 124 583 A1 describes a water-soluble metal treating agent that may contain a polyalkylene glycol in addition to fatty acids and fatty alcohols.
  • Metalworking Chemicals "Performance Products", (2010-12-31), XP055123809 discloses a rolling oil for aluminum containing PEG diesters, castor oil ethoxylates (emulsifiers), fatty alcohols, phosphate esters, and alkanolamines.
  • the invention is based on the object of providing a cooling lubricant with which the visually visible defects on aluminum strips or aluminum foils frequently caused by fatty acids and/or fatty alcohols in cold rolling processes can be avoided without impairing the lubricating effect and tribological activity of the rolling oil.
  • the invention further relates to a process for producing an aluminum product (aluminum strip or aluminum foil), in which the above-mentioned cooling lubricant is used for cold rolling an aluminum strip.
  • the invention relates to the use of the above-mentioned cooling lubricant for the cold rolling of an aluminium strip into a thinner aluminium strip than the not yet cold-rolled aluminium strip or into an aluminium foil (aluminium product).
  • the resulting aluminum product is free of visually visible defects caused by fatty acids and fatty alcohols. It has a surprisingly high wettability for water and N-methyl-2-pyrrolidone (NMP). Furthermore, the aluminum product does not require corona treatment if a high surface energy of the aluminum foil surface is desired.
  • the cooling lubricant according to the invention is oil-soluble; it is not miscible with water.
  • the cooling lubricant according to the invention is free from straight-chain olefins, in particular free from alpha-olefins with 6 to 40 carbon atoms.
  • a fatty acid is contained as a lubricating additive in a proportion of at most 0.2% by weight, preferably at most 0.1% by weight, based on the mass of the cooling lubricant.
  • a fatty alcohol is contained as a lubricating additive in a proportion of at most 0.4% by weight, preferably at most 0.3% by weight, based on the mass of the cooling lubricant. If the fatty acid proportion and/or the fatty alcohol proportion in the lubricant according to the invention are above the previously specified maximum value, the wetting properties of the aluminum product rolled with it deteriorate.
  • Aluminium products within the meaning of the invention are aluminium sheets, aluminium strips and aluminium foils that have been subjected to cold rolling.
  • An aluminium foil can, for example, have a thickness of 4 to 100 ⁇ m or can also be thicker than 100 ⁇ m.
  • the term aluminium within the meaning of the invention includes aluminium and aluminium alloys.
  • Polyalkylene glycols to be used according to the invention include conventional polyalkylene glycols and compounds with a polyalkylene glycol structure such as polyoxyalkylene fatty alcohol ethers (ethoxylated fatty alcohol).
  • the alkylene radical in the polyalkylene glycol or polyalkylene oxide can be ethylene, propylene or butylene (polyethylene glycols, polypropylene glycols, polybutylene glycols).
  • the fatty alcohol can contain 8 to 20 carbon atoms.
  • the fatty alcohol radical can be, for example, decanol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol. These compounds have lubricating and cooling properties during the cold rolling of aluminum.
  • polyalkylene glycol used below includes polyalkylene glycols and compounds with a polyalkylene glycol structure.
  • the polyalkylene glycols used according to the invention can have a kinematic viscosity of 5 mm 2 /s to 250 mm 2 /s, preferably 10 mm 2 /s to 200 mm 2 /s at 40 °C.
  • the polyalkylene glycols used according to the invention are liquid above 5 °C and are therefore easy to dose. They can be insoluble or soluble in water.
  • Particularly preferred polyalkylene glycols or compounds containing polyalkylene oxide are ethoxylated fatty alcohols such as tetraethylene glycol monododecyl ether.
  • Corresponding polyalkylene glycols are commercially available.
  • the proportion of polyalkylene glycol in the rolling oil according to the invention can be up to 10% by weight, in particular 0.01 to 8% by weight and particularly preferably 0.1 to 5% by weight, in each case based on the mass of the rolling oil.
  • the polyalkylene glycol therefore replaces the fatty acids and fatty alcohols additives usually present in cold rolling lubricants.
  • the cooling lubricant according to the invention has a good lubricating effect or tribological effect without the previously mentioned disadvantageous effects of fatty acids and fatty alcohols.
  • the cooling lubricant according to the invention is based on a hydrocarbon base oil with a boiling point in the range of 180 to 300 °C, measured according to DIN EN ISO 3405.
  • the base oil contains straight-chain and branched hydrocarbons.
  • the base oil can contain a hydrocarbon mixture.
  • the proportion of aromatics therein can preferably be less than 1% by weight, based on the mass of the base oil.
  • the base oil can be a mineral oil or a synthetic oil. It can contain natural and/or synthetic n-paraffins and/or natural and/or synthetic isoparaffins.
  • the kinematic viscosity of this low-aromatic hydrocarbon mixture can be 1.5 to 3.6 mm 2 /s at 20 °C. This kinematic viscosity provides good flow properties in the cold rolling mill and enables uniform lubrication and cooling.
  • the proportion of base oil in the cooling lubricant according to the invention can be 90% by weight or more, based on the mass of the cooling lubricant.
  • the proportion of base oil can be, for example, 90% by weight to 99% by weight of the mass of the cooling lubricant.
  • the cooling lubricant according to the invention can contain conventional additives to increase the high-pressure lubricating properties, antioxidants and conductivity improvers.
  • Additives for increasing the high-pressure lubricating properties include esters of straight-chain saturated C 10-14 carboxylic acids. These include, for example, butyl stearate and methyl dodecanoate. Methyl dodecanoate is particularly preferred. These can be present in an amount of up to 10% by weight, preferably 1 to 8% by weight, based on the mass of the cooling lubricant.
  • Suitable antioxidants include sterically hindered monovalent, divalent and trivalent phenols and polynuclear phenols, especially tert-butylphenols. A typical representative of this group is methylene-4,4'-bis-(2,6-di-tert-butylphenol).
  • Other suitable antioxidants include amines such as diphenylamine, phenyl- ⁇ -naphthylamine, p,p'-tetramethyldiaminodiphenylmethane and N,N'-diphenyl-p-phenyldiamine.
  • a previously mentioned antioxidant can be used in combination with other antioxidants such as sulfides and polydisulfides in usual concentrations.
  • the cooling lubricant according to the invention allows the aluminum product obtained after cold rolling to be further processed for a range of applications without the need for corona treatment. Nevertheless, a surface energy is achieved on the surface of the aluminum product as is present after corona treatment on aluminum products that have been cold rolled in the presence of fatty acids and fatty alcohols. In addition, the surface of the aluminum product has a high wettability for water and N-methyl-2-pyrrolidone (NMP).
  • NMP N-methyl-2-pyrrolidone
  • the aluminum product contains residues of the polyalkylene glycol used in the cooling lubricant according to the invention on its surface.
  • the amount of polyalkylene glycol on the aluminum product after cold rolling can be up to 5 mg/m 2 or more. After carrying out the process according to the invention, for example, 0.01 mg/m 2 to 5 mg/m 2 of polyalkylene glycol or a compound containing a polyalkylene oxide structure can be present on the surface of the aluminum product.
  • the lubricant according to the invention results in a significant reduction in the number of visually visible defects on the aluminum strips or aluminum foils produced. This is probably due to the fact that rolling oil components do not form deposits on the rolling stock that are difficult to remove. The omission of fatty alcohols appears to increase this reduction even further. Residues of the rolling oil according to the invention can be easily removed chemically or thermally from the surface of the rolling stock, or the surface of the rolling stock shows only a small amount of residue after thermal degreasing.
  • cooling lubricant according to the invention It is advisable to heat the cooling lubricant according to the invention to at least about 40 ° C before use. This reduces its viscosity and allows it to flow through the roll gap more quickly.
  • the lubricating properties of the cooling lubricant according to the invention were determined using an MTM2 Mini-Traction machine from PCS Instruments in the standard configuration with a load-exerting steel ball (diameter 19.05 mm) and an aluminum test disk rotating at different speeds.
  • the load on the test disk by the ball (3 ⁇ 4" ball bearing steel AISI 52100 (100Cr6, 1.3505)) was set to 40N (0.5 GPa contact pressure) and friction coefficients (RK) at different rolling speeds of.
  • the following Table 1 shows the two mean values (MW) of the friction coefficients measured at rolling speeds of 1 to 200 m/min.
  • the disk was made of an aluminum alloy AA1XXX.
  • the sliding/rolling ratio (SRR) during the test was 50%.
  • Lubricant sample 2 provides a good lubricating film with more abrasion but with a clean disk.
  • the lubricant sample 3 according to the invention provides a better lubricating film formation.
  • sample 4 which also shows hardly any running marks on the ball.
  • sample 5 which shows hardly any abrasion.
  • Samples 6 to 12 show good lubricating film formation. Samples 6 and 7 show some abrasion, sample 8 shows hardly any abrasion. Sample 6 shows acceptable wetting with water, sample 7 shows good wetting and sample 8 shows very good wetting with water.
  • Sample 10 shows hardly any abrasion and hardly any running marks on the ball. Samples 11 and 12 show little running marks on the ball.
  • Example 2 Determination of the wetting angle after rolling with different
  • an aluminum foil made of an alloy of type AA1XXX was also used to determine the wetting angle on the surface of the foil.
  • the contact angles (KW) were measured when wetted with water and with NMP.
  • the wetting angle or contact angle was determined in a drop test with a drop volume of 5 ⁇ l with demineralized water or NMP using the Drop Shape Analyzer DSA 10 from Krüss GmbH, Hamburg, Germany.
  • the measurements are average values of individual measurements at four different positions on the surface of the foil sample. The results of the measurements are shown in Table 2 below.
  • the surface energy (SFE) was determined by determining the contact angle. The corresponding values are given in Table 2.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Lubricants (AREA)

Claims (7)

  1. Utilisation d'un lubrifiant réfrigérant pour le laminage d'aluminium, en particulier pour le laminage à froid d'aluminium, contenant
    - une huile de base à base d'huile minérale ou synthétique et
    - un polyéthylène glycol, un polypropylène glycol, un polybutylène glycol, un alcool gras éthoxylé ou un mélange d'au moins deux des composés susmentionnés,
    dans laquelle
    - le lubrifiant réfrigérant n'est pas soluble dans l'eau ou miscible à l'eau,
    - le lubrifiant réfrigérant est sensiblement exempt d'acides gras et d'alcools gras, dans lequel sensiblement exempt signifie qu'un acide gras est contenu comme additif lubrifiant dans une proportion d'au plus 0,2 % en poids par rapport à la masse du lubrifiant réfrigérant et qu'un alcool gras est contenu comme additif lubrifiant dans une proportion d'au plus 0,4 % en poids, par rapport à la masse du lubrifiant réfrigérant,
    - le lubrifiant réfrigérant est exempt d'oléfines à chaîne droite.
  2. Utilisation selon la revendication 1, caractérisée en ce que la proportion de polyalkylène glycol ou d'alcool gras éthoxylé dans le lubrifiant réfrigérant va de 0,01 à 10 % en poids, par rapport à la masse du lubrifiant réfrigérant.
  3. Utilisation selon l'une des revendications précédentes,
    caractérisée en ce que l'alcool gras éthoxylé est un éther monododécylique de polyéthylène glycol, en particulier un éther monododécylique de tétraéthylène glycol.
  4. Utilisation selon l'une des revendications précédentes,
    caractérisée en ce que l'huile de base du lubrifiant réfrigérant est présente dans une proportion d'au moins 85 % en poids, en particulier d'au moins 90 % en poids, par rapport à la masse du lubrifiant réfrigérant.
  5. Utilisation selon une ou plusieurs des revendications 1 à 4,
    caractérisée en ce que le lubrifiant réfrigérant contient un ester d'acide gras en une quantité allant jusqu'à 10 % en poids, par rapport à la masse du lubrifiant réfrigérant.
  6. Utilisation selon la revendication 5, caractérisée en ce que l'ester d'acide gras est choisi parmi les esters méthyliques d'acides gras en C10-14 saturés à chaîne droite, en particulier le dodécanoate de méthyle.
  7. Procédé permettant le laminage à froid d'un produit en aluminium exempt de défauts visibles visuellement et provoqués par des acides gras,
    caractérisé en ce que l'on utilise pour le laminage à froid d'une bande en aluminium un lubrifiant réfrigérant, contenant
    - une huile de base à base d'huile minérale ou synthétique et
    - un polyéthylène glycol, un polypropylène glycol, un polybutylène glycol, un alcool gras éthoxylé ou un mélange d'au moins deux des composés susmentionnés,
    dans lequel
    - le lubrifiant réfrigérant n'est pas soluble dans l'eau ou miscible à l'eau,
    - le lubrifiant réfrigérant est sensiblement exempt d'acides gras et d'alcools gras, dans lequel sensiblement exempt signifie qu'un acide gras est contenu comme additif lubrifiant dans une proportion d'au plus 0,2 % en poids par rapport à la masse du lubrifiant réfrigérant et qu'un alcool gras est contenu comme additif lubrifiant dans une proportion d'au plus 0,4 % en poids, par rapport à la masse du lubrifiant réfrigérant,
    - le lubrifiant réfrigérant est exempt d'oléfines à chaîne droite.
EP21762692.8A 2020-08-17 2021-08-17 Lubrifiant de refroidissement pour laminage à froid de l'aluminium Active EP4196558B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20191350.6A EP3957708A1 (fr) 2020-08-17 2020-08-17 Lubrifiant de refroidissement pour laminage à froid de l'aluminium
PCT/EP2021/072781 WO2022038111A1 (fr) 2020-08-17 2021-08-17 Lubrifiant de refroidissement pour laminage à froid d'aluminium

Publications (3)

Publication Number Publication Date
EP4196558A1 EP4196558A1 (fr) 2023-06-21
EP4196558B1 true EP4196558B1 (fr) 2024-06-19
EP4196558C0 EP4196558C0 (fr) 2024-06-19

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Application Number Title Priority Date Filing Date
EP20191350.6A Withdrawn EP3957708A1 (fr) 2020-08-17 2020-08-17 Lubrifiant de refroidissement pour laminage à froid de l'aluminium
EP21762692.8A Active EP4196558B1 (fr) 2020-08-17 2021-08-17 Lubrifiant de refroidissement pour laminage à froid de l'aluminium

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20191350.6A Withdrawn EP3957708A1 (fr) 2020-08-17 2020-08-17 Lubrifiant de refroidissement pour laminage à froid de l'aluminium

Country Status (7)

Country Link
US (1) US12215295B2 (fr)
EP (2) EP3957708A1 (fr)
JP (1) JP2023535646A (fr)
KR (1) KR102636604B1 (fr)
CN (1) CN115885025B (fr)
CA (1) CA3191862C (fr)
WO (1) WO2022038111A1 (fr)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2169718B1 (fr) * 1971-12-31 1974-09-13 Inst Francais Du Petrole
US3919093A (en) * 1974-07-15 1975-11-11 Mobil Oil Corp Lubricant compositions containing alkylene oxide polymers and sulfur
GB8428621D0 (en) * 1984-11-13 1984-12-19 Alcan Int Ltd Lubricant
US4949566A (en) * 1989-09-11 1990-08-21 Robert Eichelbaum Rolling mill lubrication
KR970010855B1 (ko) 1990-05-14 1997-07-01 이데미쓰 고산 가부시끼가이샤 금속가공용 윤활유 조성물
JP3133141B2 (ja) * 1992-04-03 2001-02-05 日石三菱株式会社 金属加工油組成物
JPH09208984A (ja) * 1996-02-02 1997-08-12 Nippon Steel Corp 冷間圧延油組成物、冷間圧延油エマルション及び冷間圧延方法
JP3527936B2 (ja) * 1996-06-24 2004-05-17 新日本石油株式会社 金属加工油組成物
US6059976A (en) * 1997-08-28 2000-05-09 Kaiser Aluminum & Chemical Corporation Reclamation of spent aluminum rolling coolant oils, emulsions and dispersions
JP4833487B2 (ja) * 2001-09-21 2011-12-07 Ｊｘ日鉱日石エネルギー株式会社 アルミニウム加工用潤滑油組成物
JP2003096482A (ja) * 2001-09-21 2003-04-03 Nippon Oil Corp アルミニウム加工用潤滑油組成物
JP2009242726A (ja) * 2008-03-31 2009-10-22 Jfe Steel Corp 冷間圧延用潤滑剤および冷間圧延方法
JP2009242700A (ja) * 2008-03-31 2009-10-22 Jfe Steel Corp 冷間圧延用圧延油および冷間圧延方法
WO2014189711A1 (fr) 2013-05-23 2014-11-27 Dow Global Technologies Llc Polyalkylène glycols utilisables comme additifs pour lubrifiants dans des huiles de base hydrocarbonées
JP6283552B2 (ja) 2014-03-28 2018-02-21 出光興産株式会社 水溶性金属加工油および金属加工用クーラント

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Publication number Publication date
EP3957708A1 (fr) 2022-02-23
CA3191862C (fr) 2024-05-28
JP2023535646A (ja) 2023-08-18
CA3191862A1 (fr) 2022-02-24
CN115885025B (zh) 2024-05-24
BR112023002718A2 (pt) 2023-03-14
KR102636604B1 (ko) 2024-02-16
EP4196558A1 (fr) 2023-06-21
EP4196558C0 (fr) 2024-06-19
US20230203395A1 (en) 2023-06-29
KR20230052281A (ko) 2023-04-19
CN115885025A (zh) 2023-03-31
WO2022038111A1 (fr) 2022-02-24
US12215295B2 (en) 2025-02-04

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