EP0360503A1 - Use of aqueous compositions in the plastic processing of metals - Google Patents
Use of aqueous compositions in the plastic processing of metals Download PDFInfo
- Publication number
- EP0360503A1 EP0360503A1 EP89309379A EP89309379A EP0360503A1 EP 0360503 A1 EP0360503 A1 EP 0360503A1 EP 89309379 A EP89309379 A EP 89309379A EP 89309379 A EP89309379 A EP 89309379A EP 0360503 A1 EP0360503 A1 EP 0360503A1
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- EP
- European Patent Office
- Prior art keywords
- composition
- perfluoropolyethereal
- weight
- molecular weight
- different
- Prior art date
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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
- 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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- 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
- C10M147/00—Lubricating compositions characterised by the additive being a macromolecular compound containing halogen
- C10M147/04—Monomer containing carbon, hydrogen, halogen and oxygen
-
- 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
- C10M2201/02—Water
-
- 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
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
-
- 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
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/04—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen, halogen and oxygen
-
- 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
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/06—Perfluoro polymers
-
- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
-
- 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
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- 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
- C10N2040/241—Manufacturing joint-less pipes
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- 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
- C10N2040/242—Hot 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
- C10N2040/243—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
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- 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
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- 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
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- 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
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/01—Emulsions, colloids, or micelles
Definitions
- compositions always require specific additives depending on the fields of use, in order to attain good values for the specific properties which are of major interest for the expected use.
- microemulsions of both neutral and functional perfluoropolyether are prepared according to the ealier patent application EP-A-0,250,766.
- the lubricating composition according to the invention may furthermore contain small amounts of conventional additives such as components endowed with anticorrosive or antiwear properties, surfactants, EP additives, etc depending on the specific use they are intended for.
- Example 13 Rolling and PSCT tests
- alloys and mechanical characteristic thereof are disclosed eg in "Registration records of International alloy designation. Chemical Composition Limits for wrought aluminium and wrought alloy”. Aluminium Association - Dusseldorf, Washington.
- the test carried out according to Guminski/Willis was the following : A 50x2.52x150 mm strip of aluminium alloy 3003 - H22 was subjected, after wetting with the lubricant, to 5 successive compressions between two vertical plates measuring 75x6.20 mm in a press mounted in a traction/compression machine, the whole in accordance with the indication given by Guminski and Willis, with the exception that the applicated load was of 6,800 kg in order to make the test more selective.
- the fluids of the present invention can be applicated to the metal surface according to conventional methods such as immersion, spraying, and by means of jets, brushes, wiping, rollers or the like.
- composition was applied by brush.
- the lubricant must have good EP characteristics (high pressures), i.e. it must secure the sliding between two metal surfaces (sheet iron to be deformed and dies) under a high pressure, and that is achieved by lubricants which do not exhibit any film rupture under such conditions.
- high pressures high pressures
- the lubricants may be a mineral oil with various additives, as well as soap baths, emulsions, waxes, greases, fluoride and phosphate baths, chloroparaffins, polymeric resins, graphite or MoS 2 in oil etc.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Description
- The present invention relates to a liquid water-based composition useful as a lubricating and refrigerating liquid in the plastic processing of metals, which comprises, as a basic ingredient, a perfluoropolyethereal compound. The composition according to the invention is suitable in particular for rolling, dishing, drawing, pressing of metals in general, of ferrous and non-ferrous types such as steel, copper, aluminium and alloys thereof.
- The use of liquids acting as lubricants in metal processing processes is well known. Such liquids, which generally consist of hydrocarbon oils with various additives for improving the performances thereof under severe operative conditions (high pressures, high temperatures), exhibit the drawback of being inflammable.
- Recently, the use of aqueous emulsion with components having lubricating properties has been suggested. Such products are practically unaffected by the drawback of being inflammable under the operating conditions, and also satisfactorily fulfil the task of cooling the materials being processed. Lubricating compositions of this type are described for example in EP-A-0,048,216 (Alusuisse) CA-A-987,655 (Exxon), US-A-4,585,565 (Alcoa) and US-A-4,618,441 (Alcoa). Although many compositions in the form of aqueous emulsions have been suggested, it has been found that it is very difficult to prepare a composition which exhibits excellent performances as regards lubrication and cooling, a low friction coefficient (in order to achieve high reduction ratios) and which, furthermore, is endowed with good lubricating properties at high pressures and at the same time is free from various drawbacks such as instability of the emulsion which can lead to separation under the operating conditions.
- The known compositions always require specific additives depending on the fields of use, in order to attain good values for the specific properties which are of major interest for the expected use.
- A new metal processing composition according to the invention is an aqueous composition comprising from 1 to 40% by weight of a perfluoropolyethereal compound having an average molecular weight of at least 400 with end groups of the perfluoropolyethereal chain consisting of perfluoroalkyls and/or of functional groups.
- The composition of the invention, besides exerting an excellent lubricating action, which allowas a large reduction of thickness in a single run or pass in the rolling process, also effect an efficacious cooling of the material being processed by virtue of the high water content of the composition. The water content is at least 60% by weight and is preferably at least 80% by weight.
- Furthermore, the compositions do not leave harmful product residues on the processed material, in a few cases it being possible to avoid a subsequent washing or rinsing. The compositions according to the invention possess a high chemical stability and, if they are in the form of microemulsions, an unlimited physical stability. In addition, the residues remaining after evaporation of the water are non-inflammable.
- An essential component of the lubricating-refrigerating compositions according to the invention is a perfluoropolyether (PFPE) having an average molecular weight of at least 400 and preferably not higher than 5,000, with end groups of the perfluoropolyethereal chain of neutral type (perfluoroalkyl groups) and/or of polar functional type. The perfluoropolyethereal compound may be present in the aqueous composition either in the form of solution when the average molecular weight does not exceed 1,000 and the end groups are particularly hydrophilic(carboxylic groups), or in the form of microemulsions when the molecular weight exceeds 1,000 or alternatively when the average molecular weight is low and the end groups are neutral (perfluoroalkyl groups). The term "microemulsion" designates a liquid, macroscopically single-phase composition, which is limpid (transparent) or slightly opalescent (translucent), optically isotropic, indefinitely stable in a defined temperature range comprising the temperature at which said composition is used.
- The microemulsions of both neutral and functional perfluoropolyether are prepared according to the ealier patent application EP-A-0,250,766.
- Perfluoropolyethereal compounds which are particularly suitable as basic components of the aqueous composition of the present invention are the ones having a carboxylic end group suitably salified with organic or inorganic bases, in particular with ammonia or triethanolamine.
- The amount of total perfluoropolyethereal compounds in the lubricating composition according to the invention ranges from 1% to 40% by weight, preferably from 2% to 20%.
- The perfluoropolyethers suited to form the lubricating compositions which are the object of the present invention are in particular the ones which have an average molecular weight from 400 to 5,000 and preferably from 600 to 2,000, and belong in particular to one or more of the following classes:
- 1)
- 2) RfO(CF2CF2O)n(CF2O)mR'f with a random distribution of the perfluorooxyalkylene units, wherein Rf and R'f like or different from each other, are -CF3 or -C2F5, or -COOH, -CF2COOH and m and n have such values as to meet the abovesaid requirements;
- 3)
- 4)
- 5) RfO(CF2CF2O)nR'f wherein Rf and R'f, like or different from each other, are -CF3, -C2Fs, or one of the above-indicated carboxylic radicals, and n has such a value as to meet the abovesaid requirements;
- 6) RfO(CX2CF2CF2O)nR'f wherein Rf and R'f, like or different from each other, are -CF3 or -C2F5 or -C3F7 or one of the above-indicated carboxylic radicals, X is F or H, n having such a value as to meet the abovesaid requirements;
- 7)
- Perfluoropolyethers of class 1) are commercially available under the trademarks Fomblin RY or GaldenR . and those of class 2) are commercially available under the trademark FomblinRZ, all being produced by Montedison.
- Products of class 4), which are available on the market are the KrytoxR (du Pont). Products of class 5) are described in US-A-4,523,039 or in J. Am. Chem. Soc. 1985, 107, 1197-1201.
- Products of class 6) are described in EP-A-0,148,482 in the name of Daikin.
- The products of class 3) are prepared according to US-A-3,665,041. The products of class 7) are described in italian patent applications Nos. 20,406 A/88 and 20,407 A/88 in the name of the present applicant.
- A second inessential but still very useful ingredient, in particular in order to increase the stability of the aqueous microemulsion when it contains non functional (neutral) PFPE, is a hydrogenated aliphatic alcohol, in particular isopropanol, or a fluorinated alcohol such as perfluoropolyether with end group -OH and a low molecular weight (≤ 450).
- The alcohol amount in the aqueous composition may be as much as 20% by weight, but usually it does not exceed 10%. Useful compositions are described in previously cited EP-A-0,250,766.
- The lubricating composition according to the invention may furthermore contain small amounts of conventional additives such as components endowed with anticorrosive or antiwear properties, surfactants, EP additives, etc depending on the specific use they are intended for.
- The formulations of a few lubricating compositions according to the invention are indicated in the following examples, which are given for mrerely illustrative purposes. In Example 13 (Rolling and PSCT tests), alloys and mechanical characteristic thereof are disclosed eg in "Registration records of International alloy designation. Chemical Composition Limits for wrought aluminium and wrought alloy". Aluminium Association - Dusseldorf, Washington.
- Composition:
- 23.0g of a monocarboxylic acid with perfluoropolyethereal structure belonging to class 1, having an average equivlent weight equal to 668,
- - 7.8 ml of an ammonia aqueous solution at 10% by weight of ammonia;
- - 53 ml of isopropyl alcohol;
- - 384 ml of bidistilled water.
- The sample contained 4.6% by weight of fluorinated substances and had a viscosity equal to 1.16 cst at 40 C and an almost neutral pH (product reference: LR.1).
- Composition:
- - 9.4g of ammonium salt of the monocarboxylic acid with perfluoropolyethereal structure belonging to class 1, having an average equivalent weight equal to 636;
- - 1.3 g of a monofunctional alcohol having perfluoropolyethereal structure belonging to class 1, having an average equivalent weight equal to 600;
- - 0.2 g of triethanolamine sebacate dissolved in 4.2 g of normal-butyl alcohol;
- - 2.7 g of the PFPE having perfluoropolyethereal end groups belonging to class 1 and having an average molecular weight equal to 650 ;
- - 82.2 g of bidistilled water.
- Composition:
- - 17.17 g of a monocarboxylic acid with perfluoropolyethereal structure belonging to class 1, having an average equivalent weight equal to 441;
- - 8.8 ml of an ammonia aqueous solution at 10% by weight of NH3;
- - 284 ml of bidistilled water.
- Composition:
- - 150.4 g of a monocarboxylic acid with perfluoropolyethereal structure belonging to class 1, having an average equivalent weight equal to 443 and a narrow molecular weight distribution;
- - 52.1 g of an ammonia solution at 10% by weight of ammonia;
- - 10.8 g of a perfluoropolyether having an average molecualr weight equal to about 1,200;
- - 32.4 g of a fluorinated alcohol having a perfluoropolyethereal structure and a molecular weight equal to 678;
- - 23.0 g of isopropyl alcohol;
- - 293.1 ml of bidistilled water.
- Composition:
- - 18.39 g of a monocarboxylic acid having perfluoropolyethereal structure belonging to class 7, having a chlorofluoroalkyl end group for each molecule and having an average equivalent weight of about 850 and a wide distribution of the molecular weights;
- - 6.44 g of an aqueous ammonia solution at 10% by weight of NH3;
- - 338 g of bidistilled water.
- Composition:
- - 19.8 g of a perfluoropolyether belonging to class 1 having carboxylic end groups and an average molecular weight equal to 4170;
- - 14.6 g of isopropyl alcohol;
- - 2.2 g of monocarboxylic acid having perfluoropolyethereal structure, belonging to class 1, having an average equivalent weight of 668;
- - 63.4 g of aqueous phase containing the ammonia which is necessary to salify the carboxylic groups. The O/W microemulsion obtained by mixing the above-listed components was a fluid, clear between 25. and 75. C, containing a viscosity of 38 cst at 40 C (product reference: LR.A).
- Composition:
- - 5.3 g of a functionalized perfluoropolyether belonging to class 1, having carboxylic end groups and an average molecular weight equal to 2080;
- - 19.2 g of isopropyl alcohol;
- - 75.5 g of an aqueous solution containing the ammonia which is necessary to salify the carboxylic groups. The O/W microemulsion obtained by mixing the abovesaid components was a fluid, limpid between 25° and 50 C, containing 5.3% by weight of fluorinated substances and having a viscosity of 2.25 cst at 40°C (product reference: LR.C).
- Composition:
- - 25.2 g of a monocarboxylic acid having perfluoropolyethereal structure, belonging to class 1, having an average equivalent weight equal to 668 and a wide distribution of the molecular weights;
- - 9.1 ml of an aqueous ammonia solution at 10% by weight of ammonia;
- 1.4 ml of a perfluoropolyether having perfluoroalkyl end groups, belonging to class 1 and having an average molecular weight equal to 650;
- - 28 ml of isopropanol;
- - 280 ml of bidistilled water.
- The sample was stable in the whole temperature range taken into examination, contained 8.2% by weight of fluorinated substances and had a viscosity of 1.2 cst at 40 C, the pH being equal to 8 (product reference: LR.5).
- Composition:
- - 55.0g of a monocarboxylic acid having perfluoropolyethereal structure belonging to class 7, having a chlorofluoralkyl end group per molecule and having an average equivalent weight of about 478 and a wide molecular weight distribution;
- - 62.14 g of triethanolamine;
- - 10.14 g of bidistilled water.
- The resulting solution contained 4.86% by weight of chlorofluorinated substances and had a pH equal to 8.36 (product reference: LR.15 TEA).
- Composition:
- - 26.18 g of ammonium salt of the acid belonging to class 1, having an average equivalent weight equal to 441;
- - 1.4g of a perfluoropolyether of class 1, having perfluoroalkyl end groups and an average molecular weight of about 650;
- - 5.6 ml of isopropyl alcohol;
- - 293 ml of bidistilled water.
- The system was limpid in the whole temperature range. It contained 8.8% by weight of fluorinated substances and had a viscosity of 0.85 cst at 40 C; it was brought to a pH = 8 by adding thereto 0.15 ml of an ammonia solution at 10% by weight of ammonia (product reference: LR.7).
- Composition:
- - 35.1 g of a monocarboxylic acid of perfluoropolyethereal structure belonging to class 1, having an average equivalent weight equal to 668 and a wide distribution of the molecular weights;
- - 54 g of a monocarboxylic acid of perfluoropolyethereal structure belonging to class 1, having an average equivalent weight equal to 443 and a narrow distribution of the molecular weights;
- - 11.3 g of ammonia solution at 10%;
- - 2.8 g of a perfluoropolyether of class 1, having perfluoroalkyl end groups and an average molecular weight of about 1,200;
- - 23.6 g of isopropyl alcohol;
- - 300 ml of bidistilled water.
- The microemulsion so obtained was stable in the whole temperature range. It contained 11.4% by weight of fluorinated substances and had a pH equal to 7.4. (Product reference: LR.9).
- The following examples describe the preparation of additive-containing microemulsions.
- Composition:
- - 108.0 g of a monocarboxylic acid with perfluoropolyethereal structure belonging to class 1, having an average equivalent weight equal to 668;
- - 1.8 g of a monocarboxylic acid with perfluoropolyethereal structure belonging to class 1, having an average equivalent weight equal to 443 and a narrow distribution of the molecular weights;
- - 33.7 g of ammonia solution at 10%;
- - 33.4 g of perfluoropolyether having an average molecular weight of about 1,200;
- - 23.6 g of a solution of triethanolamine sebacate in isopropanol, at 10.2% by weight;
- - 3.1 g of isopropanol;
- - 240 ml of bidistilled water.
- The resulting 0/W microemulsion contained 8.6% by weight of fluorinated substances and 0.2% by weight of triethanolamine sebacate, the pH being equal to 5.3 (product reference: LR.11).
- The utilization characteristics of the lubricating compositions according to the invention, with reference to specific applications, are illustrated in detailed hereinafter.
- The lubricating compositions under examination were subjected to the "Plane Strain Compression Test" (paper 2015 by R.D. Guminski and J. Willis - Journal of the Institute of Metals, 1959-60, vol 88). The Plane Strain Compression Test is an improvement of the BISRA Compression Test (see The Rolling of Metals by L.R. Underwood, pages 116-119 - Chapman and Hall - London 1952) and is well indicative of the thickness reduction capacity of the lubricants in the cold-rolling of aluminium: the data determined in the plane strain compression test are well in correlation to the behaviour in use exhibited by the lubricating mixtures. Further literature sources on the P.S.C.T., which extend the validity of the test also to steel, are : Kubie and Delamare - Journal of Lubrication Technology, pages 538-551 - 1982, vol 104).
- The test carried out according to Guminski/Willis was the following : A 50x2.52x150 mm strip of aluminium alloy 3003 - H22 was subjected, after wetting with the lubricant, to 5 successive compressions between two vertical plates measuring 75x6.20 mm in a press mounted in a traction/compression machine, the whole in accordance with the indication given by Guminski and Willis, with the exception that the applicated load was of 6,800 kg in order to make the test more selective.
- The fluids of the present invention can be applicated to the metal surface according to conventional methods such as immersion, spraying, and by means of jets, brushes, wiping, rollers or the like.
- In the following examples, the composition was applied by brush.
-
- Determination of the friction coefficient by means of the Plane Strain Compression Test (PSCT), as is described by Kubie and Delamare in the above-cited literature. Also this test, which provides the friction coefficient values, permits to evaluate the reduction ratios obtainable in the rolling process.
- Metal test-piece (20x300 mm sheet thickness: about 0.6 mm), applicated load: 10,000 kg:
- a) steel at 0.03% of C and 1% of Hn, annealed;
- b) Al/Hg alloy 5052 0, annealed. The test-pieces were degreased by means of acetone before being tested.
- Tested lubricants:
- a) composition of example 1 (LR.1);
- b) composition of example 5 (LR. 15);
- c) composition example 7 (LR.C) ;
- d) composition of example 9 (LR. 15 TEA);
- e) rolling oil for the steel referred to as Q.27, a commercial product having the following composition:
- f) emulsion of preceding product Q.27 at 10% by weight of water;
- g) palm oil;
- h) product which is an aqueous emulsion at 4% by weight of the following oily composition:
-
- Dishing is the process by means of which a metal plate is subjected to permanent plastic deformation by buckling between two surfaces (die and punch).
- The lubricant must have good EP characteristics (high pressures), i.e. it must secure the sliding between two metal surfaces (sheet iron to be deformed and dies) under a high pressure, and that is achieved by lubricants which do not exhibit any film rupture under such conditions. In general different lubricants are utilized at present, depending on the type of dishing to be carried out and on the materials to be worked; the lubricants may be a mineral oil with various additives, as well as soap baths, emulsions, waxes, greases, fluoride and phosphate baths, chloroparaffins, polymeric resins, graphite or MoS2 in oil etc.
- The PFPE-based aqueous compositions according to the present invention are suited also as lubricants for the dishing process.
- The use of these compositions in this type of application is novel. The compositions are suited to the dishing of metals as they permit a dishing ratio comparable to the ones obtainable with whole oils based on hydrocarbons, while remarkably reducing the necessity to degrease the sheets for the subsequent processing steps.
- The compositions of the invention may further contain minor amounts of additives for particular operative conditions if necessary. Such additives may be for instance corrosion inhibitors, antistatic agents, surfactants or slippage agents.
- The fluids of the invention were subjected to the Erichsen test (UN 8341) on steel PE P04, (UNI).
- The fluids of the present invention are applicable to the metal surface by means of conventional methods such as dipping, spraying, wiping, by brushes, roller or the like. The results, which are reported on the following table 4, indicate the depth of penetration, in tenths of mm, of the punch into a sheet-steel having a roughness of 0.8 microns.
- For the fluids utilized in several plastic processings of metals, good EP characteristics may be required.
- In order to determine the EP characteristics of the microemulsions and aqueous solutions of perfluoropolyethers and derivatives thereof, "Shell 4 balls" tests (IP 239/79) were carried out.
- The "Shell 4 balls" tests were always carried out using balls made of steel UNI 100 Cr6.
-
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2199888 | 1988-09-19 | ||
IT8821998A IT1227163B (en) | 1988-09-19 | 1988-09-19 | WATER LIQUID COMPOSITIONS INCLUDING PERFLUOROPOLYETEREOID COMPOUNDS AND LUBRICANTS IN THE PLASTIC METAL PROCESSING |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0360503A1 true EP0360503A1 (en) | 1990-03-28 |
EP0360503B1 EP0360503B1 (en) | 1993-05-19 |
Family
ID=11189979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89309379A Expired - Lifetime EP0360503B1 (en) | 1988-09-19 | 1989-09-15 | Use of aqueous compositions in the plastic processing of metals |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0360503B1 (en) |
JP (1) | JP2935714B2 (en) |
CA (1) | CA1336595C (en) |
DE (1) | DE68906625T2 (en) |
IT (1) | IT1227163B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0900130A1 (en) * | 1996-03-27 | 1999-03-10 | H.C. Starck Inc. | Metalworking lubrication |
WO1999025516A2 (en) * | 1997-11-13 | 1999-05-27 | Minnesota Mining And Manufacturing Company | Methods of working metal and compositions useful as working fluids therefor |
WO2010046464A1 (en) * | 2008-10-24 | 2010-04-29 | Solvay Solexis S.P.A. | Method for forming a lubricating film |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04168621A (en) * | 1990-10-31 | 1992-06-16 | Hitachi Ltd | Lubrication composition and electronic component using the same |
JPH05143975A (en) * | 1991-09-24 | 1993-06-11 | Sony Corp | Magnetic recording medium |
JP5604343B2 (en) * | 2011-03-18 | 2014-10-08 | Jx日鉱日石エネルギー株式会社 | Lubricating oil composition for plastic working |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0250766A1 (en) * | 1986-06-26 | 1988-01-07 | AUSIMONT S.p.A. | Microemulsions containing perfluoropolyethers |
-
1988
- 1988-09-19 IT IT8821998A patent/IT1227163B/en active
-
1989
- 1989-09-15 EP EP89309379A patent/EP0360503B1/en not_active Expired - Lifetime
- 1989-09-15 DE DE89309379T patent/DE68906625T2/en not_active Expired - Fee Related
- 1989-09-19 JP JP1243263A patent/JP2935714B2/en not_active Expired - Lifetime
- 1989-09-19 CA CA000611997A patent/CA1336595C/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0250766A1 (en) * | 1986-06-26 | 1988-01-07 | AUSIMONT S.p.A. | Microemulsions containing perfluoropolyethers |
Non-Patent Citations (1)
Title |
---|
J. AM. CHEM. SOC., vol. 107, no. 5, 1985, pages 1197-2101; D.F. PERSICO et al.: "Synthesis of perfluoropolyethers via hydrocarbon polysters: A new general method" * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0900130A1 (en) * | 1996-03-27 | 1999-03-10 | H.C. Starck Inc. | Metalworking lubrication |
EP0900130A4 (en) * | 1996-03-27 | 2000-04-05 | Starck H C Inc | Metalworking lubrication |
WO1999025516A2 (en) * | 1997-11-13 | 1999-05-27 | Minnesota Mining And Manufacturing Company | Methods of working metal and compositions useful as working fluids therefor |
WO1999025516A3 (en) * | 1997-11-13 | 1999-09-02 | Minnesota Mining & Mfg | Methods of working metal and compositions useful as working fluids therefor |
WO2010046464A1 (en) * | 2008-10-24 | 2010-04-29 | Solvay Solexis S.P.A. | Method for forming a lubricating film |
CN102197118A (en) * | 2008-10-24 | 2011-09-21 | 索尔维索莱克西斯公司 | Method for forming a lubricating film |
US9005711B2 (en) | 2008-10-24 | 2015-04-14 | Solvay Specialty Polymers Italy S.P.A. | Method for forming a lubricating film |
Also Published As
Publication number | Publication date |
---|---|
DE68906625D1 (en) | 1993-06-24 |
JPH02153996A (en) | 1990-06-13 |
JP2935714B2 (en) | 1999-08-16 |
CA1336595C (en) | 1995-08-08 |
IT8821998A0 (en) | 1988-09-19 |
DE68906625T2 (en) | 1993-12-09 |
EP0360503B1 (en) | 1993-05-19 |
IT1227163B (en) | 1991-03-20 |
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