EP1174487B1 - Mehrzwecke funktionelle Flüssigkeit für landwirtschaftliche Maschine oder Baumaschine - Google Patents

Mehrzwecke funktionelle Flüssigkeit für landwirtschaftliche Maschine oder Baumaschine Download PDF

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Publication number
EP1174487B1
EP1174487B1 EP01117840A EP01117840A EP1174487B1 EP 1174487 B1 EP1174487 B1 EP 1174487B1 EP 01117840 A EP01117840 A EP 01117840A EP 01117840 A EP01117840 A EP 01117840A EP 1174487 B1 EP1174487 B1 EP 1174487B1
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EP
European Patent Office
Prior art keywords
base oil
fatty acid
multipurpose functional
functional fluid
fluid
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EP01117840A
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English (en)
French (fr)
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EP1174487A2 (de
EP1174487A3 (de
Inventor
Hiroshi Watanabe
Michio Shiga
Satoshi Ohta
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Chevron Oronite Japan Ltd
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Oronite Japan Ltd
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Priority claimed from JP5281781A external-priority patent/JPH07109477A/ja
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Publication of EP1174487A3 publication Critical patent/EP1174487A3/de
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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
    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/38—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/045—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
    • 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
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • 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
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/027—Neutral salts thereof
    • 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
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/028—Overbased salts thereof
    • 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
    • C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/144—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings containing hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/146—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings having carboxyl groups bound to carbon atoms of six-membeered aromatic rings having a hydrocarbon substituent of thirty or more carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/16—Naphthenic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/26—Overbased carboxylic acid 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/26—Overbased carboxylic acid salts
    • C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C10M2207/2835—Esters of polyhydroxy compounds used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/286—Esters of polymerised unsaturated acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
    • 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
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/046—Overbasedsulfonic acid 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
    • 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
    • C10M2223/045—Metal containing thio derivatives
    • 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
    • C10M2223/06—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds
    • C10M2223/065—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds containing sulfur
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/34—Lubricating-sealants
    • 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
    • C10N2040/50—Medical uses

Definitions

  • the present invention relates to a multipurpose functional fluid for agricultural machinery or construction machinery, such as a multipurpose functional fluid for tractors. More particularly, the invention relates to a multipurpose functional fluid for agricultural machinery or construction machinery, that fluid showing good biodegradability and performance that is almost equal to that of conventional multipurpose functional fluids that use a mineral oil as base oil.
  • multipurpose functional fluids have been used as lubricating hydraulic fluids for various construction machinery and agricultural machinery.
  • the multipurpose functional fluids are used for lubrication of power transmission devices (e,g., speed change gear and differential gear), elevating operation parts of machine tools and hydraulic systems (e.g., power steering system), and for lubrication of engine systems and wet type brake systems.
  • Conventionally employed multipurpose functional fluids are prepared by compounding a mineral oil as a base oil with a detergent dispersant and an antioxidant and, if necessary, a viscosity index improver and other additives.
  • the present inventors have studied the use of a vegetable oil as the base oil in place of the mineral oil in accordance with technical information obtained so far. However, they have concluded that a multipurpose functional fluid using a vegetable oil as the base oil has insufficient stability, particularly in the oxidation stability.
  • JP-A-2 248 497 discloses a lubricant for a plunger chip in Al casting comprising a mineral base oil and lubricating additives selected from one or more of oils, fats, fatty acids, fatty acid esters.
  • the esters include those of hindered alcohols such as trimethylolpropane, neopentyl glycol, pentaerythritol with coconut oil fatty acid, oleic acid and stearic acid.
  • a mixture of rapeseed oil with oleic acid is disclosed.
  • ester base oils which have lubricity and biodegradability
  • these additives provide oxidation resistance, rust prevention, brake chatter prevention, water tolerance, etc., which are not sufficient in the base oil alone.
  • a class of such additives, useful for making multipurpose functional fluids is not soluble in every ester base oil otherwise suitable based on its lubricity and biodegradability. In this invention, we have discovered those combinations of multipurpose functional fluid additive and ester base oil which also are compatible and allow a practical product to be formulated.
  • the present invention provides a multipurpose functional fluid for agricultural machinery or construction machinery that has excellent brake chatter performance in a wet-brake system.
  • That multipurpose functional fluid has a specific fatty acid triester of trimethylolpropane as base oil, a detergent-dispersant and an antioxidant.
  • the multipurpose functional fluid can have a viscosity index improver.
  • the fatty acid triester of trimethylolpropane is obtained from a fatty acid derived from a coconut oil which has been adjusted to have a stearic acid content of from 10 % to 20 % by weight.
  • the present invention resides in a multipurpose functional fluid for agricultural machinery or construction machinery, comprising a base oil, a detergent-dispersant and an antioxidant, in which a fatty acid triester of trimethylolpropane is used as the base oil.
  • That multipurpose functional fluid also can comprise a viscosity index improver.
  • the fatty acid triester of trimethylolpropane can be prepared by esterifying trimethylolpropane and a fatty acid or a mixture of fatty acids by a conventional process.
  • the fatty acid triester of trimethylolpropane used in the invention is an ester obtained by using a fatty acid of 6 or more carbon atoms as the fatty acid, and most of the fatty acids are preferably those having 8 or more carbon atoms. It is preferred that the total amount of the fatty acid having 8 carbon atoms and the fatty acid having 10 or more carbon atoms is not less than 80% by weight based on the whole amount of all the fatty acids.
  • a specific type of fatty acid is used, which is derived from a coconut oil which has been adjusted to have a stearic acid content of from 10 % to 20 % by weight.
  • ester base oils which have lubricity and biodegradability
  • additives used to provide the equipment performance lacking in the base oil itself.
  • These additives provide oxidation resistance, rust prevention, brake chatter prevention, water tolerance, etc., which are not sufficient in the base oil alone.
  • a class of such additives, useful for making multipurpose functional fluids is not soluble in every ester base oil otherwise suitable based on its lubricity and biodegradability. In this invention, we have discovered those combinations of multipurpose functional fluid additive and ester base oil which also are compatible and allow a practical product to be formulated.
  • the base oil used for the multipurpose functional fluid of the invention is preferably made of only the fatty acid triester of trimethylolpropane
  • other known base oil materials such as mineral oils, vegetable oils and polyalkylene glycol, can be added thereto as far as the amount of the added materials is less than 50% by weight, particularly less than 20% by weight, based on the whole amount of the base oil.
  • a detergent-dispersant such as metal sulfonate and an antioxidant such as zinc dialkyldithtophosphate are added to the base oil. If necessary, a viscosity index improver such as poly(methyl methacrylate) can also be added.
  • a variety of detergent-dispersants, antioxidants and viscosity index improvers are known as those for multipurpose functional fluids. These known materials or their analogous compounds can be used for preparing the multipurpose functional fluid of the invention. Some typical examples of these materials are described below.
  • a metal phenate or a metal sulfonate is generally used.
  • the metal phenate is an alkaline earth metal salt of sulfide of alkylphenol having an alkyl group of about 8 to 30 carbon atoms.
  • alkaline earth metals generally used are calcium, magnesium and barium.
  • the metal sulfonate is an alkaline earth metal salt of sulfonate of a mineral oil having a molecular weight of about 400 to 600 or an alkaline earth metal salt of sulfonate of an alkyl-substituted aromatic compound.
  • alkaline earth metals generally used are calcium, magnesium and barium.
  • metal phenate and the metal sulfonate can be used singly or in combination.
  • metallic detergents such as salicylates, phosphonates, and naphthenates of alkaline earth metals. They can be used singly or in combination with the above-mentioned phenate or sulfonate.
  • metal-containing detergents can be of either a neutral type or an over-based type having a base number of 150 to 300 or more. If desired, detergent-dispersants of ashless type (which may contain boron) can be used singly or in combination.
  • the detergent-dispersant is generally incorporated into the multipurpose functional fluid in an amount of 0.05 to 10% by weight per total amount of the multipurpose functional fluid.
  • Zn-DTP zinc dialkyldithiophosphate
  • Zn-DTP functions as not only an antioxidant but also an antiwear agent.
  • Zn-DTP zinc dihydrocarbyldithiophosphate generally having an alkyl group of to 18 carbon atoms or an alkylaryl group having an alkyl group of 3 to 18 carbon atoms.
  • the antioxidant is generally incorporated into the multipurpose functional fluid in an amount of 0.1 to 3% by weight per total amount of the multipurpose functional fluid.
  • viscosity index improvers examples include polyalkyl methacrylate, an ethylene/propylene copolymer, a styrene/butadiene copolymer and polyisoprene. Also employable are viscosity index improvers of dispersant type (having increased dispersancy) or multifunction type. These viscosity index improvers can be used singly or in combination.
  • the amount of the viscosity index improver to be incorporated into the multipurpose functional fluid varies with desired viscosity of the target hydraulic fluid, and generally is In the range of 1 to 20% by weight per total amount of the multipurpose functional fluid.
  • the viscosity index improver used for the multipurpose functional fluid of the invention is preferably prepared using as a polymerization reaction solvent a fatty acid triester of trimethylolpropane, which is a base a oil material of the invention, or a mixture thereof with other base oil material, and polymerizing a monomer such as methacrylate (starting material) in the solvent.
  • the viscosity index improver solution thus obtained (preferably having a concentration of 5 to 20% by weight) can be easily incorporated into multipurpose functional fluids, and hence the Incorporation work ability can be improved.
  • the multipurpose functional fluid of the invention can contain various auxiliary additives in addition to the components described above, if desired.
  • auxiliary additives include known antioxidants, extreme pressure agents, corrosion inhibitors, rust inhibitors, friction modifiers, antifoaming agents and pour point depressants.
  • antiwear improving agents and multifunction type additives e.g., organic molybdenum compounds such as molybdenum dithiophosphate
  • multifunction type additives e.g., organic molybdenum compounds such as molybdenum dithiophosphate
  • each additives can be added separately to a base oil.
  • the multipurpose functional fluid is preferably prepared by a process of dissolving the viscosity index improver in a portion of the base oil to beforehand to prepare a viscosity index improver solution (that is, the viscosity index improver Is subjected to polymerization reaction in the base oil as is described before to prepare the solution) and then mixing the solution with other portion of the base oil, the detergent-dispersant, the antioxidant and other additives.
  • the base oil was a triester of trimethylolpropane and fatty acid derived from coconut oil; content of stearic acid component in the fatty acid: increased to not less than 14 wt.%.
  • the calcium sulfonate was a mixture of over-based type and neutral type.
  • Base oil 93.7 wt.% Calcium sulfonate 4.2 wt.% Zn-DTP 1.6 wt.% Friction modifier 0.5 wt.% Antifoaming agent 10 ppm
  • the base oil was a triester of trimethylolpropane and fatty acid derived from coconut oil; content of stearic acid component in the fatty acid: increased to not less than 14 wt.%.
  • the calcium sulfonate was a mixture of over-based type and neutral type.
  • Viscosity index Improver was a polymethacrylate solution prepared by using the above triester type base oil as a reaction solvent; concentration of the solution is 10 wt.%.
  • Base oil 83.7 wt.% Calcium sulfonate 4.2 wt.% ZnDTP 1.6 wt.% Friction modifier 0.5 wt.% Antifoaming agent 10 ppm Viscosity index improver 10 wt.%
  • the base oil was a coconut oil:fatty acid triglyceride.
  • the calcium sulfonate was a mixture of over-based type and neutral type.
  • the viscosity index improver was a polymethacrylate solution prepared by using the above coconut oil as a reaction solvent; concentration of the solution: 10 wt.%.
  • Base oil 83.7 wt.% Calcium sulfonate 4.2 wt.% Zn-DTP 1.6 wt.% Wear reducing agent 0.5 wt.% Antifoaming agent 10 ppm Viscosity Index improver 10 wt.%
  • the base oil was a refined mineral oil.
  • the calcium sulfonate was a mixture of over-based type and neutral type.
  • the viscosity index improver was a polymethacrylate solution.
  • Base oil 83.7 wt.% Calcium sultonate 4.2 wt.% Zn-DTP 1.6 wt.% Friction modifier 0.5 wt.% Antifoaming agent 10 ppm Viscosity index improver 10 wt.%
  • the gear test was performed in accordance with the test method ASTM-D-4998 using a FZG gear rig test machine.
  • the wear amount (based on the amount before the test) of the gear after the test was not more than 100 mg, the hydraulic fluid used was marked acceptable.
  • the wear amount thereof was more than 100 mg, the hydraulic fluid used was marked fail.
  • the pump test was performed in accordance with the test method ASTM-D-2882 using a vane pump test machine, (V104C type of Vickers Co.).
  • V104C vane pump test machine
  • the oxidation stability was examined in accordance with the lubricating oil oxidation stability test method JIS-K-2514 defined by Japanese Industrial Standard.
  • the hydraulic fluid satisfying the following requisites was marked acceptable, while the hydraulic fluid not satisfying them was marked fall.
  • Test conditions 150°C, 96 hours.
  • the biodegradability test was performed in accordance with the CEC-L-33-T-82 test method defined by CEC (Coordination European Council).
  • the hydraulic fluid showing a biodegradability of not less than 80% was marked acceptable, while the hydraulic fluid other than this was marked fail.
  • the hydraulic fluid After the hydraulic fluid was prepared, it was allowed to stand at room temperature to observe tendency of turbidity with time. When any turbidity or sedimentation was not observed after 3 months, the hydraulic fluid used was marked acceptable. When turbidity or sedimentation was observed, the hydraulic fluid used was marked fail.
  • the calcium sulfonate was a mixture of over-based type and neutral type.
  • Base oil 93.7 wt.% Calcium sulfonate 4.2 wt.% Zn-DTP 1.6 wt.% Friction modifier 0.5 wt.% Antifoaming agent 10 ppm
  • the calcium sulfonate was a mixture of over-based type and neutral type.
  • Base oil 93.7 wt.% Calcium sulfonate 4.2 wt.% Zn-DTP 1.6 wt.% Friction modifier 0.5 wt.% Antifoaming agent 10 ppm
  • the base oil was a tetraester of pentaerythritol and fatty acid; composition of the fatty acid: caprylic acid 100 wt.%.
  • the calcium sulfonate was a mixture of over-based type and neutral type.
  • Base oil 93.7 wt.% Calcium sulfonate 4.2 wt.% Zn-DTP 1.6 wt.% Friction modifier 0.5 wt.% Antifoaming agent 10 ppm
  • the calcium sulfonate was a mixture of over-based type and neutral type.
  • Base oil 93.7 wt.% Calcium sulfonate 4.2 wt.% Zn-DTP 1.6 wt.% Friction modifier 0.5 wt.% Antifoaming agent 10 ppm
  • the multipurpose functional fluid for agricultural machinery or construction machinery uses an ester type oil as a base oil, it is highly biodegradable and shows satisfactory performance in various characteristics including oxidation stability required for multipurpose functional fluids for agricultural machinery or construction machinery.
  • the multipurpose functional fluid of the invention can be used as a highly practical multipurpose functional fluid with reduction of environmental pollution.

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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)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Lubricants (AREA)
  • Detergent Compositions (AREA)

Claims (3)

  1. Mehrzweckarbeitsfluid für landwirtschaftliche oder Baumaschinen, umfassend ein Grundöl, ein Detergensund Dispersionsmittel sowie ein Antioxidans, wobei das Grundöl ein Fettsäuretriester von Trimethylolpropan ist, erhalten aus einer Fettsäure, die aus Kokosnussöl stammt und auf einen Stearinsäuregehalt von 10 bis 20 Gew.% eingestellt wurde.
  2. Mehrzweckarbeitsfluid nach Anspruch 1, wobei das Detergens- und Dispersionsmittel in einer Menge von 0,05 bis 10 Gew.%, bezogen auf das gesamte Fluid, zugegen ist, wobei das Antioxidans Zinkdialkyldithiophosphat ist und in einer Menge von 0,1 bis 3 Gew.%, bezogen auf die Gesamtmenge an Fluid, zugegen ist und der Fettsäuretriester des Trimethylolpropans mindestens 50 Gew.% des Grundöls ausmacht.
  3. Mehrzweckarbeitsfluid nach Anspruch 1, das zudem einen Viskositätszahl-Verbesserer enthält.
EP01117840A 1993-10-15 1994-10-13 Mehrzwecke funktionelle Flüssigkeit für landwirtschaftliche Maschine oder Baumaschine Expired - Lifetime EP1174487B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP28178193 1993-10-15
JP5281781A JPH07109477A (ja) 1993-10-15 1993-10-15 農業機械もしくは建設機械用の共通潤滑作動油
EP94307536A EP0652280A3 (de) 1993-10-15 1994-10-13 Mehrzwecke funktionelle Flüssigkeit für landwirtschaftliche Maschine oder Baumaschine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP94307536A Division EP0652280A3 (de) 1993-10-15 1994-10-13 Mehrzwecke funktionelle Flüssigkeit für landwirtschaftliche Maschine oder Baumaschine

Publications (3)

Publication Number Publication Date
EP1174487A2 EP1174487A2 (de) 2002-01-23
EP1174487A3 EP1174487A3 (de) 2002-02-06
EP1174487B1 true EP1174487B1 (de) 2003-08-06

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* Cited by examiner, † Cited by third party
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DE102006053093A1 (de) * 2006-11-10 2008-05-15 Bomag Gmbh Ölschmierung
CN107236591A (zh) * 2017-07-12 2017-10-10 合肥轻风飏电气科技有限责任公司 一种环保耐磨抗极压的润滑油组合物

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263159A (en) * 1978-03-24 1981-04-21 Stauffer Chemical Company Automatic transmission fluid comprising esters derived from a particular monocarboxylic acid composition
JPH0745674B2 (ja) * 1986-03-03 1995-05-17 出光興産株式会社 金属加工用潤滑油
JPH02248497A (ja) * 1989-03-23 1990-10-04 Yushiro Chem Ind Co Ltd プランジャチップ用潤滑剤

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EP1174487A2 (de) 2002-01-23
EP1174487A3 (de) 2002-02-06
DE69433027D1 (de) 2003-09-11

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