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
• • 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
  • C10M2201/08—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 subject of the present invention is a cold rolling process for metals using an aqueous lubricant comprising a mixture based on at least one carboxylic acid, on at least one phosphate ester and including at least one wax.
• lubricants such as for example whole oils and aqueous lubricants.
• the other additives used are based on sulfur (sulfur-containing esters, sulfur-containing oils) or based on phosphorus (phosphate esters) or mixtures thereof. They result in the formation of a metal sulfide or a metal phosphate.
• the object of the present invention is to propose a cold rolling process for metals that does not have the drawbacks of the usual processes.
• the process according to the invention makes it possible to work under very severe conditions, representative of high-productivity conditions, while still maintaining the surface finish (coloration, brightness) of the deformed metal.
• a cold rolling process for metals using an aqueous lubricant comprising (1) at least one mixture based on at least one acid chosen from saturated or unsaturated, monocarboxylic or polycarboxylic acids containing 5 to 40 carbon atoms; on at least one acid phosphate ester of formula (RO) x —P( ⁇ O) (OH) x′ , in which formula R is an optionally polyalkoxylated hydrocarbon radical, x and x′ being equal to 1 or 2, provided that the sum of x and x′ is equal to 3; the carboxylic acid and/or the acid phosphate ester being optionally neutralized by an organic or mineral base; and (2) at least one natural or synthetic wax having a melting point not less than 50° C. and having a mean particle size ranging between 0.5-10 ⁇ m.
• formula R is an optionally polyalkoxylated hydrocarbon radical, x and x′ being equal to 1 or 2, provided that the sum of x and x′ is equal to 3
• the size measurements are carried out either by laser diffraction or by light scattering. There is no difficulty for those skilled in the art to choose one of these two methods depending on the size of the objects.
• conventional lubricant is understood to mean either a whole oil containing one or more extreme-pressure additives, or an aqueous lubricant also containing one or more extreme-pressure additives. It should be noted that conventional extreme-pressure additives are compounds containing phosphorus (such as for example phosphates) or sulfur (such as especially sulfonates).
• an aqueous lubricant according to the invention allows the productivity of cold rolling operations to be significantly improved.
• this lubricant it is possible to increase the thickness reduction ratio of the rolled metal by at least 15%, more particularly by at least 20% and highly advantageously by at least 30%, compared with the maximum reduction ratio achievable by a rolling mill using a conventional lubricant, whether a whole oil containing one or more extreme-pressure additives or an aqueous lubricant containing one or more extreme-pressure additives.
• the aqueous lubricant comprises at least one mixture based on at least one acid chosen from saturated or unsaturated, monocarboxylic or polycarboxylic acids containing 5 to 40 carbon atoms; on at least one acid phosphate ester of formula (RO) x —P( ⁇ O) (OH) x′ , in which formula R is an optionally polyalkoxylated hydrocarbon radical, x and x′ being equal to 1 or 2, provided that the sum of x and x′ is equal to 3, the carboxylic acid and/or the acid phosphate ester being optionally neutralized by an organic or mineral base.
• formula R is an optionally polyalkoxylated hydrocarbon radical, x and x′ being equal to 1 or 2, provided that the sum of x and x′ is equal to 3, the carboxylic acid and/or the acid phosphate ester being optionally neutralized by an organic or mineral base.
• the mixture (1) may be an aqueous solution or an aqueous dispersion.
• the term “dispersion” denotes a dispersion of vesicles, droplets or micelles in an aqueous medium.
• the carboxylic acid used possesses one or more carboxylic functional groups and at least one radical containing 5 to 40 carbon atoms, said radical being a linear or branched, alkyl or alkenyl radical having one or more ethylenically unsaturated groups (carbon-carbon double bonds) and optionally being substituted with one or more hydroxyl radicals.
• the acid possesses one or more carboxylic functional groups and a radical containing 7 to 30 carbon atoms, optionally substituted with one or more hydroxyl radicals and optionally having one or more ethylenically unsaturated groups.
• said acid possesses one carboxylic functional group or two.
• this second functional group may or may not be at the end of the chain.
• the carboxylic acid is a saturated or unsaturated fatty acid, more particularly comprising a single carboxylic functional group, 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 examples include the unsaturated fatty acids having a single ethylenically unsaturated group, such as linderic, myristoleic, palmitoleic, oleic and erucic acids; unsaturated fatty acids having two ethylenically unsaturated groups, such as linoleic acid; unsaturated fatty acids having three ethylenically unsaturated groups, such as linolenic acid; and unsaturated fatty acids carrying a hydroxyl group, such as ricinoleic acid, as well as mixtures thereof.
• unsaturated fatty acids having a single ethylenically unsaturated group such as linderic, myristoleic, palmitoleic, oleic and erucic acids
• unsaturated fatty acids having two ethylenically unsaturated groups such as linoleic acid
• R is a hydrocarbon radical containing 1 to 30 carbon atoms, said radical being a saturated or unsaturated, aliphatic or cycloaliphatic radical or an aromatic radical.
• the radicals R which are identical or different, are linear or branched radicals containing 8 to 26 carbon atoms, these being alkyl radicals or alkenyl radicals carrying one or more ethylenically unsaturated groups.
• radicals R which may or may not be identical, may be aromatic radicals carrying alkyl, arylalkyl or alkylaryl substituents, these radicals containing 6 to 30 carbon atoms.
• aromatic radicals carrying alkyl, arylalkyl or alkylaryl substituents, these radicals containing 6 to 30 carbon atoms.
• the OA groups which may or may not be identical, correspond to an oxyethylene, oxypropylene or oxybutylene radical, or mixtures thereof.
• said group corresponds to an oxyethylene and/or oxypropylene radical.
• this is preferably between 0 and 80.
• the acid phosphate ester forming part of the composition of the mixture (1) may be formed from a combination of several of them.
• carboxylic acid and/or the acid phosphate ester may be in a form neutralized by a mineral or organic base.
• bases used are preferably water-soluble.
• water-soluble bases is understood to mean compounds soluble in an aqueous medium, at 20° C., with a concentration of from 3 to 7% by weight.
• the bases employed are organic bases but are more particularly chosen from primary, secondary or tertiary amines or polyamines comprising at least one linear, branched or cyclic hydrocarbon radical having 1 to 40 carbon atoms, said radical being optionally substituted with one or more hydroxyl radicals and/or one or more alkoxylated groups.
• the said alkoxylated groups are preferably ethoxylated units.
• the number of alkoxylated units, if present, is less than or equal to 100.
• the amines when the amines have at least two amine functional groups, said functional groups are separated in pairs by a number of carbon atoms ranging between 2 and 5.
• Suitable amines mention may be made of monoethanolamine, diethanolamine, ethylenediamine, aminoethylethanolamine and aminomethylpropanolamine.
• Polyalkoxylated fatty amines may also be used as 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 amine functional groups is at least equal to the total number of moles of carboxylic acid functional groups, and preferably at least twice as large.
• the mixture (1) may optionally furthermore include 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 a C 6 -C 12 one;
• polyalkoxylated mono-, di- or tri-(alkylaryl)phenol preferably chosen from those in which the alkyl substituent is a C 1 -C 6 one;
• polyalkoxylated aliphatics more particularly C 8 -C 22 alcohols
• polyalkoxylated units if present, of these nonionic surfactants usually varies from 2 to 100. It should be noted that the term “polyalkoxylated units” is understood to mean ethoxylated units, propoxylated units or mixtures thereof.
• the amount of surfactant usually varies, if it is present, between 1 and 30% by total weight of the mixture (1).
• the contents of carboxylic acid, of acid phosphate ester, optionally of base, preferably an organic base, and optionally of nonionic surfactant are such that the solids content of the aqueous medium is at least 10% by weight. More precisely, the solids content is between 10 and 70% by weight. Preferably, the solids content varies between 10 and 40% by weight.
• the pH of the mixture (1) ranges between 7 and 9. This pH range may inter alia be achieved by the addition of a buffer agent to said mixture.
• said mixture (1) is combined with at least one metal in the form of a multivalent ion. More particularly, said metal may be in the form of a divalent ion or a trivalent ion. Likewise, it would not be excluded to use several metals, in identical or different oxidation states.
• said metal is chosen from columns IIA, VIII, IB, IIB and VIB, with the exception of cobalt and nickel.
• the metals are chosen from calcium, magnesium, copper, zinc, iron, aluminum and chromium, by themselves or as mixtures.
• the mixture (1) associated with the metal is more precisely in the form of a dispersion comprising lamellar crystallites having a length ranging between 0.1 and 100 ⁇ m, a width ranging between 0.5 and 30 ⁇ m and a thickness ranging between 5 and 200 nm.
• These crystallites comprise a stack of organic phases (O) and of aqueous solutions (A) in the sequence O/[A/O]n, n being an integer different from 0 and such that a stack has a thickness of 5 to 200 nm. More particularly, n is between 1 and 20.
• the size of the crystallites their length 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 abovementioned dimensions of the lamellar crystallites correspond to average values. In other words, there is a distribution in the sizes of the lamellar crystallites, the average of which lies within the above ranges.
• the measurements of the dimensions of the lamellar crystallites are carried out using transmission electron microscopy on a specimen vitrified cryogenically (Cryo-Met—see O. Aguerre-Chariol, M. Deruelle, T.
• the crystallites are advantageously used in the presence of at least one nonionic surfactant.
• the crystallites may be obtained by bringing a solution or dispersion containing the acid phosphate ester and the optionally neutralized carboxylic acid into contact with the metal in ionic and/or metallic form.
• this may equally well be in its metallic form or in the form of a multivalent cation.
• Said cation may itself be in the form of a solid, a solution or a dispersion.
• the metal is used in the form of a solution, preferably an aqueous solution
• a solution preferably an aqueous solution
• salts of mineral acids such as halides, with chlorides for example, or nitrates
• salts or organic acids such as, among others, formates and acetates.
• metal in an oxide, hydroxide or carbonate form, or 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 such that the pH of the medium is between 7 and 9.
• the contacting takes place with stirring.
• the metal in the chosen form is introduced into the mixture (1), the carboxylic acid preferably being neutralized by an organic base.
• the operation advantageously takes place at a temperature below 100° C. and preferably at a temperature ranging between 20 and 60° C.
• the aqueous lubricant used in the cold rolling process according to the invention furthermore includes at least one natural or synthetic wax, having a melting point not less than 50° C. and having a mean particle size ranging between 0.5-10 ⁇ m.
• the wax or waxes are dispersed within the mixture (1) in a homogeneous and stable manner.
• these waxes are chosen from natural waxes of the type consisting of paraffin waxes or synthetic waxes having ester and/or amide functional groups.
• the waxes used are those having amide functional groups.
• Said waxes may be obtained, for example, by a condensation reaction, and more particularly by a reaction of an ester or acid functional group with an amine functional group.
• 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′, in which formula the radicals R′, which may or may not be identical, represent an aliphatic radical containing 5 to 22 carbon atoms, said radical being saturated or having one or more conjugated or nonconjugated carbon-carbon double bonds; the radicals R′′, which may or may not be identical, represent a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms; n represents an integer between 2 and 12; and the radicals A, which may or may not be identical, represent —O— or —NH—. It should be noted that the radicals A are preferably of the same type.
• the melting point of the waxes is not less than 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 wax may be introduced into the mixture either by incorporating the wax particles, the size of which lies within the abovementioned range, into said mixture. It is also possible to introduce the wax by adding the latter in molten form to the mixture, and to precipitate it in the mixture, the operation advantageously taking place by carrying out a grinding operation so as to obtain the appropriate size of particles.
• the aqueous lubricants according to the invention may also include additives that are conventional in this field, such as preservatives, anticorrosion agents, antifoams and stabilizers.
• the metals on which such treatments may be carried out are especially, and mainly, steels, stainless steels, aluminum, copper, zinc, tin, copper-based alloys (bronze, brass), etc.
• the present invention is most particularly applicable to the cold rolling of stainless steel.
• the rolled metal was coiled stainless steel, 10 mm in width and about 0.4 mm in thickness.
• the applied force on the rolls varied from 200 metric tonnes/m to 1200 metric tonnes/m, so as to obtain a sheet reduction ratio varying from 20 to 55%.
• the lubricant according to the invention made it possible to obtain, for a linear speed of the rolls of 5 m/s, reduction ratios of at least 55% without having reached the clamping limit of the rolling mill.

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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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• 2001
  • 2001-02-06 FR FR0101566A patent/FR2820431B1/fr not_active Expired - Fee Related
• 2002
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