EP4196558A1 - Lubrifiant de refroidissement pour laminage à froid d'aluminium - Google Patents

Lubrifiant de refroidissement pour laminage à froid d'aluminium

Info

Publication number
EP4196558A1
EP4196558A1 EP21762692.8A EP21762692A EP4196558A1 EP 4196558 A1 EP4196558 A1 EP 4196558A1 EP 21762692 A EP21762692 A EP 21762692A EP 4196558 A1 EP4196558 A1 EP 4196558A1
Authority
EP
European Patent Office
Prior art keywords
cooling lubricant
aluminum
rolling
glycol
polyalkylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21762692.8A
Other languages
German (de)
English (en)
Other versions
EP4196558C0 (fr
EP4196558B1 (fr
Inventor
Stephan Draese
Thomas Graf
Oliver Seiferth
Volker Schmitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Speira GmbH
Original Assignee
Speira GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Speira GmbH filed Critical Speira GmbH
Publication of EP4196558A1 publication Critical patent/EP4196558A1/fr
Application granted granted Critical
Publication of EP4196558C0 publication Critical patent/EP4196558C0/fr
Publication of EP4196558B1 publication Critical patent/EP4196558B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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 the production of an aluminum product free of visible defects caused by fatty acids and the use of the cooling lubricant for aluminum rolling.
  • rolling emulsions and rolling oils are used as cooling lubricants, which have a major impact on the cost-effectiveness 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 the lubrication in the roll gap, so that energy consumption, frictional heat and roll wear in the rolling process are reduced.
  • Aluminum strips and foils are usually produced by rolling in a two-stage rolling process.
  • an aluminum ingot is first rolled in several passes (passes) in a so-called hot rolling stand to form a blank or strip. This is then subjected to cold rolling into 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 in hot rolling and a rolling oil in cold rolling.
  • the aluminum ingot is deformed to form an aluminum strip.
  • Hydrocarbon-based rolling oils are used as cooling lubricants in cold rolling stands. Lubricating additives can be added to these rolling oils. Typical lubricating additives are, for example, fatty alcohols, fatty acids and fatty acid esters.
  • fatty acids used regularly such as lauric acid, myristic acid, palmitic acid or stearic acid
  • the fatty acids used regularly are solid at temperatures below 40 °C and only evaporate at temperatures well above 300 °C.
  • Solid or pasty deposits of fatty acids and metal soaps formed from them can therefore occur on components in the roll stand that are not constantly flooded with rolling oil after the more volatile rolling oil has evaporated. If these solid or pasty deposits detach from the roll stand or pipelines and get onto the aluminum strip or aluminum foil, visible defects can appear on the rolling stock that can no longer be eliminated by the following process steps (further rolling passes, roll cutting, thermal or chemical degreasing). can become.
  • a further disadvantage of a fatty acid as a lubricating additive is that it can react with the components of the rolling stock, in particular with the rolling debris formed during forming.
  • Metal soaps mainly aluminum soaps, can form. After the alcohol has been oxidized to form an acid, fatty alcohols can also react with abraded aluminum to form aluminum soaps.
  • the aluminum soaps formed from the fatty acids used and aluminum abrasion have only a limited and low solubility in cold rolling oil. They also form agglomerates with the aluminum debris. Store these poorly soluble metal soaps and the metal soaps/metal abrasion agglomerates are deposited on the components of the cold rolling stand and can form the deposits mentioned in pipes and tanks.
  • metal soaps or metal soaps/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, there can also be visually visible defects on the rolled stock, which can be caused by the subsequent process steps to completion of the tape or foil can no longer be removed.
  • Filters such as horizontal pressure plate filters and filter aids such as kieselguhr, perlite and fuller's earth can be used for this purpose.
  • Increasing soap content in the rolling oil is counteracted by increased 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 produced.
  • EP 3 124583 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.
  • a water-soluble composition and not a mineral oil-based composition is thus described.
  • EP 0 484542 A1 describes a lubricant for metalworking which, in addition to a mineral oil and a straight-chain olefin, contains a fatty alcohol or a fatty acid.
  • the lubricant described therein may contain glycols. Glycols are not included in the sample compositions in this document.
  • a disadvantage of olefins in lubricants is that after the aluminum strip has been annealed, they lead to high residues from ignition on aluminum sheets.
  • EP 3 124583 A1 describes a water-soluble metal treatment agent which can contain a polyalkylene glycol in addition to fatty acids and fatty alcohols. There is therefore a need for new lubricating additives which do not form any reaction products with abraded aluminum and also do not react with other components of the rolling oil.
  • the invention is based on the object of providing a cooling lubricant with which the visually visible fault patterns on aluminum strips or aluminum strips, which are often caused by fatty acids and/or fatty alcohols in cold rolling processes, can be removed.
  • Aluminum foils can be avoided without impairing the lubricating effect and tribological activity of the rolling oil.
  • the cooling lubricant is essentially free of fatty acids and fatty alcohols.
  • the subject matter of the invention is also a method 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 subject of the invention is the use of the above-mentioned cooling lubricant for cold-rolling an aluminum strip into a thinner aluminum strip than the aluminum strip that has not yet been cold-rolled or into an aluminum foil (aluminum product).
  • the aluminum product obtained is free from visually visible defects caused by fatty acids and fatty alcohols. It shows surprisingly high wettability for water and N-methyl-2-pyrrolidone (NMP). Furthermore, if a high surface energy of the aluminum foil surface is desired, the aluminum product does not need a corona treatment.
  • the cooling lubricant according to the invention is oil-soluble; it is immiscible with water.
  • the cooling lubricant according to the invention is free from straight-chain olefins, in particular free from alpha-olefins having 6 to 40 carbon atoms.
  • essentially free of a fatty acid means that a fatty acid is present 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 .
  • essentially free of a fatty alcohol means that a fatty alcohol is present 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 content and/or the fatty alcohol content in the lubricant according to the invention is above the maximum value specified above, the wetting properties of the aluminum product rolled therewith deteriorate.
  • Aluminum products within the meaning of the invention are aluminum sheets, aluminum strips and aluminum foils which have been subjected to cold rolling.
  • An aluminum foil can have a thickness of 4 to 100 ⁇ m, for example, or it can be thicker than 100 ⁇ m.
  • the term aluminum within the meaning of the invention includes aluminum and aluminum alloys.
  • Polyalkylene glycols to be used in the present invention include common polyalkylene glycols and compounds having a polyalkylene glycol structure such as polyoxyalkylene fatty alcohol ether (ethoxylated fatty alcohol).
  • the alkylene residue in the polyalkylene glycol or polyalkylene oxide can be ethylene, propylene or butylene (polyethylene glycols, polypropylene glycols, polybutylene glycols).
  • the fatty alcohol can contain from 8 to 20 carbon atoms.
  • the fatty alcohol residue can be, for example, decanol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol. These compounds have lubricating and cooling properties when cold rolling 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.degree.
  • the polyalkylene glycols used according to the invention are liquid at temperatures above 5° C. and are therefore easy to dose. They can be water-insoluble or water-soluble.
  • ethoxylated fatty alcohols such as tetraethylene glycol monododecyl ether
  • polyalkylene glycols or a compound containing polyalkylene oxide.
  • ethoxylated fatty alcohols such as tetraethylene glycol monododecyl ether
  • polyalkylene glycols or a compound containing polyalkylene oxide.
  • 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, based in each case on the mass of the rolling oil.
  • the polyalkylene glycol therefore replaces the additives fatty acids and fatty alcohols usually found in cold rolling lubricants.
  • the cooling lubricant according to the invention has a good lubricating effect or tribological effect without the aforementioned 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 from 180 to 300° C., measured according to DIN EN ISO 3405.
  • the base oil contains straight-chain and branched hydrocarbons.
  • the base oil may contain a mixture of hydrocarbons.
  • 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 iso-paraffins.
  • 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 the 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 the 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 customary additives to increase the high-pressure lubricating properties, antioxidants and conductivity improvers.
  • Additives to enhance extreme pressure lubricity include esters of C 10-14 straight chain saturated carboxylic acids. Such include, for example, butyl stearate and methyl dodecanoate. Methyl dodecanoate is particularly preferred. These can be contained 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 monohydric, dihydric and trihydric phenols and polynuclear phenols, especially tert-butyl phenols. 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-a- naphthylamine, p,p'-tetramethyldiaminodiphenylmethane and N,N'-diphenyl-p-phenyldiamine.
  • An antioxidant mentioned above can be used in combination with other antioxidants such as sulfides and polydisulfides in the usual concentrations.
  • the cooling lubricant according to the invention allows the aluminum product obtained after cold rolling to be further processed for a number of applications without corona treatment being necessary. Nevertheless, a surface energy is achieved on the surface of the aluminum product, such as is found 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 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 as high as 5 mg/m 2 or more. After the process according to the invention has been carried out, 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. 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 formation after thermal degreasing. It makes sense to heat the cooling lubricant according to the invention to at least about 40° C. before using it. This reduces its viscosity and allows it to flow through the nip more quickly.
  • the lubricating properties of the cooling lubricant according to the invention were determined using a MTM2 Mini-Traction machine from PCS Instruments in the standard configuration with a load-applying steel ball (diameter 19.05 mm) and an aluminum test disc rotating at different speeds.
  • the load on the test disk from the ball (%”ball bearing steel A1S1 52100 (100Cr6, 1.3505)) was set to 40N (0.5 GPa contact pressure) and coefficients of friction (RK) at different rolling speeds of.
  • Table 1 below shows the two mean values (AV) of the coefficients of friction measured at rolling speeds of 1 to 200 m/min.
  • the disc was formed from aluminum alloy AA1XXX.
  • the slip/roll ratio (SRR) during the test was 50%.
  • PAG an EO/PO copolymer with a kinematic viscosity of 20mm 2 /s at 40°C
  • Lubricant sample 2 provides a good lubricating film with more wear but with a clean disc.
  • Lubricant sample 3 according to the invention provides better lubricating film formation. The same is true for sample 4, which moreover hardly shows any track on the ball. This also applies to sample 5, which gives 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 water wetting, sample 7 good wetting and sample 8 very good water wetting. Sample 10 gives hardly any abrasion and hardly any track on the ball. Samples 11 and 12 provide little tracking on the ball.

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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)

Abstract

L'invention concerne un lubrifiant de refroidissement pour laminage à froid d'aluminium, contenant : - une huile de base lubrifiante synthétique ou à base d'huile minérale, - et un polyalkylène glycol ou un composé qui contient une structure d'oxyde de polyalkylène, le lubrifiant de refroidissement n'étant pas soluble dans l'eau ou miscible dans l'eau, et - le lubrifiant de refroidissement étant sensiblement exempt d'acides gras et d'alcools gras.
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 true EP4196558A1 (fr) 2023-06-21
EP4196558C0 EP4196558C0 (fr) 2024-06-19
EP4196558B1 EP4196558B1 (fr) 2024-06-19

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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)

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Country Status (7)

Country Link
US (1) US20230203395A1 (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
WO1991018074A1 (fr) 1990-05-14 1991-11-28 Idemitsu Kosan Co., Ltd. Composition lubrifiante pour la transformation des metaux
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
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
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
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
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
BR112015025798A2 (pt) * 2013-05-23 2017-07-25 Dow Global Technologies Llc composição lubrificante e método para lubrificar um dispositivo mecânico
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

Also Published As

Publication number Publication date
EP4196558C0 (fr) 2024-06-19
EP3957708A1 (fr) 2022-02-23
CA3191862C (fr) 2024-05-28
BR112023002718A2 (pt) 2023-03-14
KR102636604B1 (ko) 2024-02-16
JP2023535646A (ja) 2023-08-18
US20230203395A1 (en) 2023-06-29
CN115885025A (zh) 2023-03-31
CN115885025B (zh) 2024-05-24
EP4196558B1 (fr) 2024-06-19
CA3191862A1 (fr) 2022-02-24
KR20230052281A (ko) 2023-04-19
WO2022038111A1 (fr) 2022-02-24

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