EP0055488B1 - Energieübertragungsflüssigkeit auf Basis von Wasser - Google Patents

Energieübertragungsflüssigkeit auf Basis von Wasser Download PDF

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Publication number
EP0055488B1
EP0055488B1 EP81110827A EP81110827A EP0055488B1 EP 0055488 B1 EP0055488 B1 EP 0055488B1 EP 81110827 A EP81110827 A EP 81110827A EP 81110827 A EP81110827 A EP 81110827A EP 0055488 B1 EP0055488 B1 EP 0055488B1
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European Patent Office
Prior art keywords
water
acid
percent
wear
weight
Prior art date
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Expired
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EP81110827A
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English (en)
French (fr)
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EP0055488A1 (de
Inventor
Walter Ensign Francis Lewis
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Union Carbide Corp
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Union Carbide Corp
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Priority to AT81110827T priority Critical patent/ATE8270T1/de
Publication of EP0055488A1 publication Critical patent/EP0055488A1/de
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Publication of EP0055488B1 publication Critical patent/EP0055488B1/de
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    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
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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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
    • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
    • C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
    • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
    • C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
    • C10M2219/088—Neutral salts
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
    • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
    • C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
    • C10M2219/089—Overbased salts
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/09—Heterocyclic compounds containing no sulfur, selenium or tellurium compounds in the ring
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
    • C10M2219/102—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon only in the ring
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
    • C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
    • 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
    • C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
    • C10M2219/106—Thiadiazoles
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/08—Hydraulic fluids, e.g. brake-fluids
    • 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

  • This invention relates to fluid compositions useful especially for transmitting energy in mechanical systems and, more particularly, to water-based compositions useful in transmitting hydraulic energy having enhanced lubricity and anti-wear properties.
  • Water-based hydraulic fluids are well known and have been used commercially for a number of years especially in applications where fire resistance is desired.
  • One commonly used class of such water-based fluids as disclosed, for example, in U.S. Patent No. 2,602,780 to Zisman et al. and U.S. Patent No. 2,768,141 to Langer et al., contain water soluble glycols or glycol ethers for low temperature protection and a high molecular weight polymeric thickener such as water soluble poly(alkylene oxide) polymers for viscosity control.
  • Such compositions also contain a variety of additives in "packages” that are added to enhance lubrication, corrosion protection, and other performance characteristics necessary for hydraulic devices and lubricants.
  • Water based hydraulic fluids commonly have high noninflammability, good temperature stability, and a relatively low cost, but generally have poorer anti-wear characteristics than petroleum-based " fluids. Fluids used in energy transmission systems must possess sufficient lubricity and mechanical stability to enable them to be used in the self-lubricated pumps, valves etc. employed in commercial hydraulic systems. Good lubricating properties, especially good lubricity and film strength, are particularly important in reducing the wear of moving components of hydraulic systems where the clearance between frictional surfaces may be very small and pressures may be very high.
  • a water-based energy transmitting and lubricating fluid having enhanced anti-wear properties which comprises an aqueous composition having a viscosity of at least about 10 mm 2 /s at 40°C which contains up to 80 percent by weight of water and has incorporated therein at least 0.1 percent by weight of an acidic lubricity agent and an amount of an anti-wear additive which is effective in enhancing the anti-wear characteristics of said composition, said anti-wear additive comprising the combination of a hydroxyl substituted aromatic acid component and a nitroaromatic compound component.
  • compositions of the invention may also contain from 0 to 50 percent by weight of a water soluble glycol or glycol ether having 2 to 14 carbon atoms used as a freezing point depressant and from 5 to 50 percent by weight of a water-soluble polymeric viscosity control agent.
  • Also provided in accordance with the present invention is a method for enhancing the anti-wear properties of water-based energy transmitting fluids containing an acidic lubricity agent which comprises incorporating in said water-based energy transmitting fluid an anti-wear additive comprising the combination of a hydroxyl substituted aromatic acid component and a nitroaromatic compound component in an amount which is effective in enhancing the anti-wear characteristics of said fluid compositions.
  • the water-based energy transmitting fluid is an aqueous composition having a viscosity of at least 10 mm 2 /S at 40°C which contains up to 80 percent by weight of water and a conventional acidic lubricity agent to which has been added an anti-wear and lubricity additive which is the combination of a hydroxyl substituted aromatic acid component and a nitroaromatic compound component.
  • the acidic lubricity agents suitable for use in compositions of the invention are well known materials which are conventionally used as lubricity improvers in water-based hydraulic and the like fluids.
  • suitable acidic materials include, for example, saturated and unsaturated aliphatic carboxylic and polycarboxylic acids having at least 6 carbon atoms such as caproic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myrisitic acid, palmitic acid, stearic acid, oleic acid, linolic acid, undecanoic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, glutaconic acid, butenetricarboxylic acid; aromatic carboxylic acids such as benzoic acid,.
  • dimethylbenzoic acid phthalic acid, terephthalic acid, isophthalic acid and trimellitic acid
  • alkali metal or organic amine salts of said aliphatic and aromated carboxylic acids such as morpholine
  • polymerized fatty acids dimer acids
  • oxycarboxylic acids such as malic and tartaric acid
  • lecto-dicarboxylic acids such as acetonedicarboxylic acid.
  • the acidic lubricity agent may be present in an amount between 0.1 and 10 percent by weight and are conventionally used in an amount between 0.5 and 2 percent by weight of the water-based composition, but greater amounts of said agent may be employed if desired for particular applications.
  • An essential component of the compositions of the invention is an anti-wear additive which is the combination of a hydroxyl substituted aromatic acid component and a nitroaromatic compound component.
  • Nitroaromatic compounds which are suitable for use as an anti-wear additive component in compositions of the invention are mononuclear aromatic compounds having at least one substituent nitro group.
  • suitable nitroaromatic compounds are the nitro-substituted aromatic acids and compounds such as nitroaromatic salts, esters, and the like, that, in situ, effect the formation of the acid anion.
  • exemplary suitable nitroaromatic compounds are 3- nitrobenzoic acid, 4- nitrophthalic acid, 4-nitroisophthalic acid, 3,5- dinitrobenzoic acid, p-nitrocinnamic acid, and the like, and alkali metal, amine, or ammonium salts thereof.
  • Hydroxyl substituted aromatic acids which are suitable for use in combination with said nitroaromatic compounds are the mononuclear hydroxyl-substituted aromatic acids such as, for example, salicylic acid, and dihydroxy substituted benzoic acid and the bridged dimer of hydroxyl-substituted aromatic carboxylic acids of the general formula: or wherein
  • bridged dimer acids are methylene or sulfur bridged, hydroxyl-substituted aromatic carboxylic acids such as 5,5'-methylenedisalicylic acid, pamoic acid, and thiodisalicylic acid.
  • the compound may be present in the composition as a salt such as an alkali metal, amine, or ammonium salt.
  • compositions of this invention it is essential that both a nitroaromatic compound and a hydroxyl substituted acid be present in order to prepare water-based compositions that exhibit enhanced anti-wear and lubricity properties.
  • the combination of anti-wear additive components hereinabove described should be present in a combined amount sufficient to impart the desired degree of anti-wear properties and lubricity to the composition, depending upon the operating conditions and service requirement for a particular application.
  • the amount of the combination of anti-wear additive components that should be present will be called herein an "effective amount", which is defined as being the minimum amount required to achieve the anti-wear properties and lubricity required for a particular application.
  • the amount of each of the anti-wear additive components and the "effective amount" of the combination thereof may vary somewhat depending on the application, the amount of each of the additive components present should be at least 0.0025 gram- moles per liter (generally 0.003 weight percent) and preferably from 0.01 to 0.50 or even more, gram- moles per liter of aqueous composition (generally between 0.01 to 10 percent by weight).
  • the relative proportions of and the maximum amount of each of the additive components and the combination thereof that should be present is not critical, with economic factors generally determining the use of amounts greatly in excess of that actually required.
  • the water-based compositions of the invention should have a viscosity of at least 10 mm 2 /s at 40°C and may contain up to 80 percent by weight of water.
  • the viscosity of the aqueous composition of the invention may vary depending upon the energy transmission application for which it is intended and the temperature range over which it will be used.
  • energy transmitting fluids such as hydraulic fluids may have viscosities in the range of 25 to 150 mm 2 /s at 40°C, and preferably in the range of 30 to 85 mm 2 /s and lubricating fluids may be used with similar viscosity requirements.
  • the water content of the compositions of the invention may vary in the range of from 20 percent to 80 percent and preferably from 30 percent to 70 percent by weight.
  • a water-soluble polymeric viscosity control and/or thickening agent is generally employed in an amount that ranges from 5 percent to 50 percent, and preferably from 10 to 20 percent by weight of the composition.
  • Water-soluble polymers that are suitable for use as viscosity control agents in the compositions of the invention are poly(alkylene oxide) polymers. Such polymers are known compounds which, even though of high molecular weight, are water-soluble.
  • these polymers will contain oxyethylene groups or both oxyethylene groups and higher oxyalkylene groups such as oxypropylene and oxybutylene groups either in random or block distribution in their molecules, and will have average molecular weights from 400 to 40,000 or even higher.
  • the amount of oxyethylene groups in the molecule is such that the poly(alkylene oxide) polymers are soluble in water at ordinary temperatures, and the amount of oxypropylene or higher oxyalkylene groups is such that the poly(alkylene oxide) remains liquid at ordinary temperatures up to an average molecular weight of 40,000 and higher or may melt at temperatures below about 60°C.
  • the oxypropylene/oxyethylene ratio may vary from zero to unity.
  • poly(alkylene oxide) polymers may be made by processes well known in the art by reacting ethylene oxide or mixtures of ethylene oxide and propylene oxide or higher alkylene oxide with a compound having at least one active hydrogen atom up to as many as six such active hydrogen atoms including, for example, water, monohydroxylic alcohols such as ethanol and propanol, dihydroxylic alcohols such as ethylene glycol, trihydroxylic alcohols such as glycerine and trimethylopropane, terthydroxylic alcohols such as pentaerythritol, hexahydroxylic alcohols such as sorbitol, and mono- or poly- functional amines such as butylamine and ethylene diamine.
  • a compound having at least one active hydrogen atom up to as many as six such active hydrogen atoms including, for example, water, monohydroxylic alcohols such as ethanol and propanol, dihydroxylic alcohols such as ethylene glycol, trihydroxylic alcohols such as glycerine and trimethyloprop
  • the poly(alkylene oxide) products of such reaction will have linear or branched oxyethylene or oxyethylene-higher oxyalkylene chains and such chains will terminate with hydroxyl groups. Some or all of these hydroxyl groups may be etherified by reaction with a dialkyl sulfate such as diethyl sulfate.
  • Another known class of water-soluble polymers that are suitable as thickeners or viscosity control agents are the polymer adducts of alkyl phenols and alkylene oxides such as, for example, the ethylene oxide/propylene oxide adducts of alkyl phenol disclosed in U.S. Patent No. 2,768,141 to Langer et al. and the ethoxylated dinonyl phenol disclosed in U.S. Patent No. 3,379,644 to Katzenstein.
  • viscosity control agents are the water-soluble polyalkyl methacrylates disclosed, for example, in U.S. Patent No. 3,352,783 to McCord which generally results from the polymerization of alkyl methacrylates in which the alkyl groups can have an average of from 3 to 10 carbon atoms.
  • the urethane polymers such as disclosed in U.S. Patent No. 3,352,783 are other suitable water-soluble polymers for use as a viscosity control agent.
  • water-soluble polymers are, for example, polyamide esters such as disclosed in U.S. Patent No. 3,341,573 to Shibe and polyamide alkoxylates such as disclosed in U.S. Patent No. 3,992,312 to Genjida et.al.
  • compositions of the invention may also contain a water-soluble freezing point depressant.
  • the water-soluble freezing point depressants conventionally employed are glycols or glycol ethers having 2 to 14 carbon atoms such as ethylene glycol, diethylene glycol, triethylene glycol, ethylene glycol ethers such as the ethyl, methyl, propyl and butyl ethers thereof, and similar ethers of diethylene and triethylene glycol.
  • glycols or glycol ethers having 2 to 14 carbon atoms
  • proportions of said glycols or glycol ethers which will
  • the energy transmission fluids of this invention may also contain other components conventionally used in water-based fluids such as corrosion, oxidation, and foam inhibitors, pH conditioners, dyes, sequestering agents and the like which may be used in small amounts from 0.01 to 5 to 10 percent by weight of the composition.
  • corrosion inhibitors including monoethanolamine, monoisopropanolamine, diethanolamine, triethanolamine, ethylenediamine, dimethylethanolamine, diethylenetriamine, cyclohexylamine, morpholine, 1,4- bis (2-aminoethyl)pyperadine, 2-heptadecyi-1-(2-hydroxyethyi)imidazoiine, derivatives thereof such as alkaline oxide adducts, alkali metal salts of carboxylic acids and the like; pH conditioners including organic amines as mentioned as corrosion inhibitors and alkali metal hydroxides; antioxidants including benzotriazole, mercaptobenzoimidazole, and mercaptobenzothiazole; foam inhibitors including silicones of the emulsion type; dyes including basic dyes and acid dyes; and sequestering agents such as aminocarboxylic acids and derivates thereof including ethylenediamotetraacetic acid, diethylenetriamine
  • corrosion inhibitors including monoethanolamine
  • each of the components used may be added in any order of addition, or combinations of some of them may be prepared prior to incorporating in the composition.
  • each of the components to be used should be water-soluble or previously made into a water-soluble form such as the alkali metal or ammonium salts thereof, or should be capable of being solubilized in situ.
  • a method whereby the anti-wear and lubricity characteristics of a water-based energy transmission fluid may be enhanced by adding to an aqueous composition having a viscosity of at least 10 mm 2 /s at 40°C which contains up to 80 percent by weight of water and has incorporated therein an acidic lubricity agent as hereinabove described, an anti-wear additive which comprises the combination of nitroaromatic compound component and a hydroxyl substituted aromatic acid in an "effective amount" to enhance the anti-wear and lubricity properties thereof.
  • Such additive components may be in the alkali metal or ammonium salt solubilized form thereof or in a form that is solubilized in situ.
  • such component may be added to the fluid when the anti-wear additive components are added.
  • the polymeric thickener used in the compositions of this Example is a water-soluble product available under the trademark designation UCON 75-H-380,000 from Union Carbide Corporation.
  • the copper wear additive is available commercially under the trademark designation REOMET 41 from Ciba-Geigy Corp.
  • compositions B to D are vastly superior to the lubricity of composition A which did not contain the anti-wear additive of the invention.
  • Example 1 The apparatus and procedure described in Example 1 is used to evaluate the lubricity (anti-wear properties) of water-based compositions containing the anti-wear additive of the invention and these are compared with compositions prepared with one or the other of the anti-wear additive components but not with the combination thereof.
  • the proportions of ingredients used and the lubricity test results are summarized in Table II.
  • the polymeric thickener of Example was used in the compositions of this Example.
  • compositions A and B which contain the anti-wear additive of the invention exhibit greatly superior wear resistance properties than composition C which did not contain any anti-wear additive components and Compositions D and E, which did not contain the combination of anti-wear additive components.
  • Example 2 Using the apparatus and procedure described in Example 1, the lubricity (anti-wear) properties of a series of fluid compositions containing various amounts of water are evaluated. The proportion of ingredients in each of the compositions and wear data obtained with each of the compositions is summarized in Table III.
  • Example 1 Using the apparatus and procedure of Example 1, the lubricity of a series of water-based fluid compositions using various types of acidic lubricity agents and anti-wear additive components are evaluated. The proportion of ingredients used in each of the compositions and pump-wear test results are summarized in Table IV. The Polymeric Thickener of Example 1 is used in the compositions of this Example.
  • composition E prepared with lauric acid as the acid lubricity agent exhibits somewhat higher wear.

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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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  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Claims (8)

1. Energieübertragungsflüssigkeit auf der Basis von Wasser verbesserter Verschleißeigenschaften mit: einer Viskosität von zumindest 10 mm2/s bei 40°C enthaltend bis zu 80 Gew.-% Wasser, zumindest 0,1 Gew.-% eines sauren Schmiermittels und einen Antiverschleiß-Zusatz in Form von zumindest 0,0025 g-mol/I einer hydroxy-substituierten aromatischen Säure und zumindest 0,0025 g-mol/I von nitro-substituierten aromatischen Säuren oder Verbindungen, die in situ das Säure-Anion zu bilden vermögen.
2. Energieübertragungsflüssigkeit nach Anspruch 1 enthaltend zumindest 20 Gew.-% Wasser.
3. Energieübertragungsflüssigkeit nach Anspruch 1 oder 2, in welcher die nitro-aromatische Verbindung eine mit einer Nitrogruppe substituierte einkernige aromatische Säure ist.
4. Energieübertragungsflüssigkeit nach Anspruch 1 bis 3, worin die hydroxy-substituierte aromatische Säure eine einkernige hydroxy-substituierte aromatische Säure oder ein Brücken-Dimeres einer hydroxysubstituierten aromatischen Carbonsäure ist.
5. Energieübertragungsflüssigkeit nach Anspruch 1 bis 4, worin das saure Schmiermittel eine gesättigte und/oder ungesättigte aliphatische Carbonsäure und/oder Polycarbonsäure mit zumindest 6 C-Atomen, eine aromatische Carbonsäure und/oder deren Alkalisalze und/oder organische Aminsalze der aliphatischen und aromatischen Säuren ist.
6. Energieübertragungsflüssigkeit nach Anspruch 1 bis 5, die bis zu 50 Gew.-% Glykol oder Glykolether mit 2 bis 14 Kohlenstoffatomen enthält.
7. Energieübertragungsflüssigkeit nach Anspruch 1 bis 6, welche ein wasserlösliches polymeres die Viskosität einstellendes Mittel in einer Menge von 5 bis 50 Gew.-% enthält.
8. Verfahren zur Verbesserung der Antiverschleiß- und Schmiereigenschaften einer Energieübertragungsflüssigkeit auf der Basis von Wasser enthaltend ein saures Schmiermittel, indem ein Antiverschleiß-Zusatz in Form einer Kombination von zumindest 0,0025 g-mol/I einer hydroxy-substituierten aromatischen Säure und zumindest 0,0025 g-mol/I nitro-substituierter aromatischer Säure oder Verbindung, welche in situ das Säure-Anion zu bilden vermag, zugesetzt wird.
EP81110827A 1980-12-30 1981-12-29 Energieübertragungsflüssigkeit auf Basis von Wasser Expired EP0055488B1 (de)

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US221503 1980-12-30

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EP4272571A1 (de) 2022-05-05 2023-11-08 Austria Juice GmbH Saftkonzentrat mit verringertem zuckergehalt und herstellungsverfahren
EP4272572A1 (de) 2022-05-05 2023-11-08 Austria Juice GmbH Direktsaft mit verringertem zuckergehalt und herstellungsverfahren

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SU279845A (de) *
US2768141A (en) * 1952-10-24 1956-10-23 Union Carbide & Carbon Corp Noninflammable hydraulic fluids
FR1185008A (fr) * 1957-10-22 1959-07-29 Chausson Usines Sa Inhibiteur de corrosion
JPS5119280A (en) * 1974-08-06 1976-02-16 Sanyo Chemical Ind Ltd Shinkinamizu gurikoorugatafunenseisadoyu
CA1163430A (en) * 1980-05-02 1984-03-13 Blake F. Mago Poly (alkylene oxide) compositions

Also Published As

Publication number Publication date
CA1161829A (en) 1984-02-07
KR870002054B1 (ko) 1987-12-03
EP0055488A1 (de) 1982-07-07
KR830007813A (ko) 1983-11-07
ATE8270T1 (de) 1984-07-15
JPS6043396B2 (ja) 1985-09-27
DE3164619D1 (en) 1984-08-09
MX160868A (es) 1990-06-06
JPS57141497A (en) 1982-09-01

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