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
  • C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
  • C10M171/06—Particles of special shape or size
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M173/00—Lubricating compositions containing more than 10% water
  • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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  • 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
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/04—Elements
  • C10M2201/041—Carbon; Graphite; Carbon black
• • 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
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/06—Metal compounds
  • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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  • 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
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/08—Inorganic acids or salts thereof
  • C10M2201/084—Inorganic acids or salts thereof containing sulfur, selenium or tellurium
• • 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
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/18—Ammonia
• • 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
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/14—Synthetic waxes, e.g. polythene waxes
• • 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
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/16—Paraffin waxes; Petrolatum, e.g. slack wax
• • 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
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/18—Natural waxes, e.g. ceresin, ozocerite, bees wax, carnauba; Degras
• • 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
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
  • C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
• • 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
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
  • C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms polycarboxylic
• • 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
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
  • C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
• • 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
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
  • C10M2207/127—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids polycarboxylic
• • 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
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
• • 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
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
  • C10M2223/041—Triaryl phosphates
• • 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
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/02—Groups 1 or 11
• • 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
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/04—Groups 2 or 12
• • 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
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/12—Groups 6 or 16
• • 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
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/14—Group 7
• • 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
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/16—Groups 8, 9, or 10
• • 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
  • C10N2020/055—Particles related characteristics
  • C10N2020/06—Particles of special shape or size
• • 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
• • 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
• • 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
  • C10N2040/246—Iron or steel
• • 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
  • C10N2040/247—Stainless steel

Definitions

• the present invention relates to a cold rolling process for metals using an aqueous lubricant comprising a mixture based on at least one carboxylic acid, at least one phosphate ester and comprising at least one wax.
• lubricants such as whole oils and aqueous lubricants.
• extreme pressure additives make it possible to delay the onset of these phenomena.
• the extreme pressure properties of the lubricant make it possible to increase the deformation of the metal (reduction of the thickness) while remaining below the limit force of reduction of the machine, by limiting micro-welds between the roughness metal and tool surfaces.
• extreme pressure additives There are different types of extreme pressure additives whose fields of application are different, depending among other things on the temperatures at the tool / metal contact points to be processed. Indeed, these additives from a certain temperature release a compound which reacts with the metal surface to create a species which will protect the whole. On the other hand, the field of use of the additive in question will be limited by the temperature at which the species which has been created will degrade. Thus, when chlorine compounds are used as an extreme pressure additive, a a layer of metal chloride is created on the surface of the metal by reaction of the chlorine released with said surface at an appropriate temperature.
• the other additives used are based on sulfur (sulfur esters, sulfur oils) or based on phosphorus (phosphate esters) or their mixtures. They cause the formation of metallic sulfide or metallic phosphate.
• aqueous lubricant in cold rolling, it does not bring any particular advantage, except that of making more efficient the cooling of the metal and the tool. Furthermore, it is possible to increase the rate of reduction of the thickness of the sheet by passage, by adding conventional extreme pressure additives. Unfortunately, these aqueous lubricants are far from providing a satisfactory solution to the desired increase in productivity. In addition, we can see the appearance of a crippling phenomenon in the field, which is an irreversible degradation of the metal surface (coloring, roughness).
• the object of the present invention is to propose a cold rolling process for metals which does not have the disadvantages of the usual processes.
• the method according to the invention makes it possible to work under very harsh conditions, representative of the conditions of high productivity, while preserving the surface condition of the deformed metal (coloring, gloss).
• R is a hydrocarbon radical, optionally polyalkoxyl, x and x 'being equal to 1 or 2, to the condition that the sum of x and x 'is equal to 3;
• conventional lubricant is meant either a whole oil comprising one or more extreme pressure additives, or an aqueous lubricant, also comprising one or more extreme pressure additives.
• the conventional extreme pressure additives are compounds comprising phosphorus (such as for example phosphates) or sulfur (such as in particular sulfonates).
• an aqueous lubricant in accordance with the invention makes it possible to significantly improve the productivity of cold rolling operations.
• this lubricant makes it possible to increase by at least 15%, more particularly by at least 20%, and very advantageously by at least 30%, the degree of reduction in the thickness of the laminated metal, with respect to the maximum degree of reduction accessible by a rolling mill using a conventional lubricant, whether the latter is a whole oil comprising one or more extreme pressure additives, or an aqueous lubricant comprising one or more extreme pressure additives.
• a conventional lubricant whether the latter is a whole oil comprising one or more extreme pressure additives, or an aqueous lubricant comprising one or more extreme pressure additives.
• the lubricants used in the context of the present invention do not leave solid residues on the metal, after thermal degradation once the rolling has been carried out.
• the mixture (1) can be an aqueous solution or an aqueous dispersion.
• dispersion denotes a dispersion of vesicles, droplets or else micelles in an aqueous medium.
• the carboxylic acid used has one or more carboxylic functions, at least one radical comprising 5 to 40 carbon atoms, alkyl or alkenyl having one or more ethylenic unsaturations (carbon-carbon double bond), linear or branched, optionally substituted by one or more hydroxyl radicals.
• the acid has one or more carboxylic functions, a radical comprising 7 to 30 carbon atoms, optionally substituted by one or more hydroxyl radicals, and optionally having one or more ethylenic unsaturations.
• said acid has a carboxylic function, or even two. If this second function is present, it may be at the end of the chain or not.
• the carboxylic acid is a fatty acid, saturated or unsaturated, more particularly comprising a single carboxylic function, or a mixture of several fatty acids.
• saturated fatty acids mention may be made of caproic, caprylic, capric, lauric, myristic, stearic, isostearic, palmitic, behenic and lignoceric acids.
• unsaturated fatty acids there may be mentioned unsaturated fatty acids having a single ethylenic unsaturation such as linderic, myristoleic, palmitoleic, oleic, erucic acids; unsaturated fatty acids having two ethylenic unsaturations such as linoleic acid; unsaturated fatty acids having three ethylenic unsaturations such as linolenic acid unsaturated fatty acids carrying a hydroxyl group such as ricinoleic acid as well as their mixtures.
• unsaturated fatty acids having a single ethylenic unsaturation such as linderic, myristoleic, palmitoleic, oleic, erucic acids
• unsaturated fatty acids having two ethylenic unsaturations such as linoleic acid
• unsaturated fatty acids having three ethylenic unsaturations such as linolenic acid unsaturated fatty acids carrying a
• palmitic, behenic, stearic, isostearic, palmitoleic, oleic, erucic, linoleic, linolenic, ricinoleic acids or their mixtures are used.
• R identical or not, represent a hydrocarbon radical, optionally polyalkoxyl , x and x 'being equal to 1 or 2, provided that the sum of x and x' is equal to 3.
• R is a hydrocarbon radical containing 1 to 30 carbon atoms, aliphatic, cycloaliphatic, saturated or unsaturated, or aromatic.
• the radicals R which are identical or different, are alkyl or alkenyl radicals carrying one or more ethylenic unsaturations, linear or branched, containing 8 to 26 carbon atoms.
• radicals R which may or may not be identical, may be aromatic radicals carrying alkyl, arylalkyl or alkylaryl substituents; these radicals comprising 6 to 30 carbon atoms.
• aromatic radicals carrying alkyl, arylalkyl or alkylaryl substituents; these radicals comprising 6 to 30 carbon atoms.
• the OA groups which may or may not be identical, correspond to an oxyethylenated, oxypropylenated, oxybutylenated radical, or their mixtures.
• said group corresponds to an oxyethylenated and / or oxypropylenated radical.
• the acid phosphate ester used in the composition of the mixture (1) may consist of a combination of several of them.
• carboxylic acid and / or the acid phosphate ester can be in a form neutralized by an inorganic or organic base.
• the bases used are preferably water-soluble.
• water-soluble means compounds which are soluble in an aqueous medium, at 20 ° C., at a concentration of 3 to 7% by weight.
• the bases used are organic bases which are more particularly chosen from primary, secondary or tertiary amines or polyamines, comprising at least one hydrocarbon radical having 1 to 40 carbon atoms, linear, branched or cyclic, optionally substituted by a or more hydroxyl radicals, and or one or more alkoxy groups.
• Said alkoxyl groups are preferably ethoxy units.
• the number of alkoxy units, if present, is less than or equal to 100.
• amines when the amines have at least two amino functions, said functions are separated two by two by a number of carbon atoms between 2 and 5.
• suitable amines may include monoethanolamine, diethanolamine, ethylenediamine, aminoethylethanolamine, aminomethylpropanolamine.
• Polyalkoxylated fatty amines can also be used as an organic base, such as, for example, those sold by Rhodia Chimie under the name Rhodameen ® CS20.
• at least the carboxylic acid is neutralized by an organic base; the amount of the latter being such that the total number of moles of amino functions is at least equal to the total number of moles of carboxylic acid functions, preferably at least twice as large.
• the mixture (1) can optionally further comprise at least one nonionic surfactant. The use of this type of compound may be desired when the mixture (1) is in the form of a dispersion.
• polyalkoxylated alkylphenols in particular those in which the alkyl substituent is C6-C12;
• polyalkoxylated mono-, di- or tri- (alkylaryl) phenol preferably chosen from those in which the alkyl substituent is C 1 -C 6;
• polyalkoxy aliphatic alcohols more particularly C8-C22; . polyalkoxy triglycerides; . polyalkoxy fatty acids; . polyalkoxylated sorbitan esters; . fatty acid amides, preferably CS-C20 . possibly polyalkoxyls.
• polyalkoxy units if present, of these nonionic surfactants usually varies from 2 to 100. It should be noted that by polyalkoxy units, we mean ethoxyls, propoxylates, or mixtures thereof.
• the surfactant content usually varies, in the case where it is present, between 1 and 30% by total weight of the mixture (1).
• the contents in the mixture (1) of carboxylic acid, acid phosphate ester, optionally base, preferably organic base, and optionally non-ionic surfactant, are such that the dry extract of the aqueous medium is at least
• the dry extract is between 10 and 70% by weight.
• the dry extract varies between 10 and 40% by weight.
• the pH of the mixture (1) is between 7 and 9. This pH range can inter alia be reached by the addition of a buffering agent in said mixture.
• said mixture (1) is associated with at least one metal in the form of a multivalent ion. More particularly, said metal can be in the form of a divalent ion or even a trivalent ion. It is likewise not excluded to use several metals, with identical or different degrees of oxidation.
• said metal is chosen from columns IIA, VIII, IB, IIB, VIB, with the exception of cobalt and nickel.
• the metals are chosen from calcium, magnesium, copper, zinc, iron, aluminum, chromium, alone or in mixtures.
• the mixture (1) associated with the metal is more precisely in the form of a dispersion comprising lamellar crystallites of length between 0.1 and 100 ⁇ m, of width between 0.5 and 30 ⁇ m and thickness between 5 and 200 nm.
• These crystallites comprise a stack of organic phases (O) and aqueous solutions (A) according to the sequence O / [A / O] n, n being an integer other than 0 and such that the stack has a thickness of 5 at 200 nm. More particularly, n is between 1 and 20.
• the length of the lamellar crystallites is advantageously between 0.5 and 20 ⁇ m.
• the width of the lamellar crystallites is more particularly between 0.5 and 10 ⁇ m.
• the thickness of the lamellar crystallites is preferably between 10 and 100 nm.
• the dimensions of the lamellar crystallites which have just been indicated correspond to average values. In other words, there is a size distribution of the lamellar crystallites, the average of which falls within the above ranges.
• the dimensions of the lamellar crystallites are measured by electron transmission microscopy on a vitrified sample by cryogenics (Cryo-Met - see O. Aguerre-Chariol, M. Deruelle, T. Boukhnikachvili, M. In, N. Shahidzadeh "Cryo- TEM on vitrified samples: principles, applications to emulsions and dispersions of surfactants ”Proceedings of the World Congress of Emulsions, Bordeaux-France (
• the crystallites are advantageously used in the presence of at least one nonionic surfactant.
• the crystallites can be obtained by bringing a solution or a dispersion comprising the carboxylic acid, optionally neutralized, the acid phosphate ester, into contact with the metal which is in an ionic and / or metallic form.
• the metal can be either in its metallic form or in the form of a multivalent cation. Said cation can itself be in the form of a solid, a solution or a dispersion.
• a solution preferably aqueous
• the metal in the form of oxide, hydroxide, carbonate, or of the metal itself.
• the contacting is carried out in the presence of at least one compound having the effect of buffering the pH. More particularly, one or more compounds are chosen so that the pH of the medium is between 7 and 9.
• the contact takes place with stirring.
• the metal is introduced in the chosen form, into the mixture (1), the carboxylic acid preferably being neutralized with an organic base.
• the operation advantageously takes place at a temperature below 100 ° C, and preferably at a temperature between 20 and 60 ° C.
• the aqueous lubricant used in the cold rolling process according to the invention also comprises at least one natural or synthetic wax, having a melting point greater than or equal to 50 ° C and having an average particle size of between 0 , 5 -10 ⁇ m.
• the wax or waxes are dispersed within the mixture (1), in a homogeneous and stable manner.
• the waxes are chosen from natural waxes of the type of paraffinic waxes or of synthetic waxes comprising ester and / or amide functions.
• the waxes used are those comprising amide functions.
• Said waxes can be obtained for example, by condensation reaction, and more particularly by reaction of an ester or acid function with an amino function.
• these waxes have a degree of polymerization of at most 10 and advantageously at most 3.
• the aforementioned waxes correspond to the following formula: R'-CO- A - (CR “2) n - A - CO - R '; formula in which R, identical or not, represent an aliphatic radical, saturated or comprising one or more carbon-carbon double bonds, conjugated or not, comprising 5 to 22 carbon atoms ; R ", which may or may not be identical, represent a hydrogen atom, an alkyl radical comprising 1 to 4 carbon atoms; n represents an integer between 2 and 12; A, identical or not, represent -O- or -NH-. It should be noted that preferably the radicals A are of the same nature.
• waxes there may be mentioned very particularly bis (amide) waxes, such as ethylene bis (alkylamide) or ethylene bis (alkenylamide).
• amide ethylene bis (alkylamide) or ethylene bis (alkenylamide).
• the melting temperature of the waxes is greater than or equal to 80 ° C.
• the wax content in the aqueous lubricant during its use is between 0.05 and 10% by weight of the lubricant, preferably between 0.05 and 5% by weight of the lubricant.
• the introduction of the wax into the mixture can be carried out either by incorporating into the said mixture the particles of wax whose size is in the range mentioned above. It is possible to introduce the wax by adding it in molten form in the mixture, and to precipitate it in the mixture, the operation advantageously taking place by carrying out a grinding so as to obtain the appropriate size of particles.
• the aqueous lubricants according to the invention can also comprise conventional additives in this field, such as preserving agents, anti-corrosion agents, anti-foaming agents, stabilizing agents. It would not be departing from the scope of the present invention to add conventional lubrication additives to the aqueous lubricant used in the invention.
• the lubricants which have just been described are particularly suitable for lubrication during the cold rolling of metals.
• the metals which can be the subject of such treatments are in particular, and mainly, steels, stainless steels, aluminum, copper, zinc, tin, copper-based alloys (bronze, brass), etc. .
• the present invention is particularly applicable to the cold rolling of stainless steel.
• composition according to the invention The following mixture is prepared, in water, and with stirring:
• Oleic acid 9% by weight
• Wax (*) 10% by weight
• Rhodafac PA35 ** 5% by weight : sufficient quantity to have a pH between 7 and 9 (buffer).
• the resulting mixture is then diluted 10 times.
• the tests take place on a rolling mill comprising two rollers 10 cm in diameter.
• the rolled metal is coiled stainless steel, 10 mm wide and about 0.4 mm thick.
• the force applied to the rollers varies from 200 tonnes / m to 1200 tonnes / m, so as to obtain a reduction rate of the plate varying from 20 to 55%.
• the lubricant is used at 80 ° C.
• the lubricant according to the invention makes it possible to obtain reduction rates of at least 55% without having reached the clamping limit of the rolling mill, at a linear speed of the rollers of 5 m / s.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)

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