EP1602711A1 - Lubricating oil composition - Google Patents

Lubricating oil composition Download PDF

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Publication number
EP1602711A1
EP1602711A1 EP05104732A EP05104732A EP1602711A1 EP 1602711 A1 EP1602711 A1 EP 1602711A1 EP 05104732 A EP05104732 A EP 05104732A EP 05104732 A EP05104732 A EP 05104732A EP 1602711 A1 EP1602711 A1 EP 1602711A1
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EP
European Patent Office
Prior art keywords
lubricating oil
optionally substituted
divalent metal
acid
oil composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP05104732A
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German (de)
English (en)
French (fr)
Inventor
Yoshitomo Fujimaki
Hideaki Mitsui
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Shell Internationale Research Maatschappij BV
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Shell Internationale Research Maatschappij BV
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Publication of EP1602711A1 publication Critical patent/EP1602711A1/en
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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
    • C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
    • 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
    • C10M2207/028—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
    • C10M2207/26—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
    • C10M2207/283—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
    • C10M2207/287—Partial esters
    • C10M2207/289—Partial esters containing free 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
    • 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
    • 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
    • C10M2223/043—Ammonium or amine 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
    • 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
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/047—Thioderivatives not containing metallic elements
    • 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
    • C10M2223/049—Phosphite
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/04—Detergent property or dispersant property
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/08—Resistance to extreme temperature
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • 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
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • 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
    • C10N2040/25—Internal-combustion engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/252—Diesel engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines

Definitions

  • the present invention relates to a lubricating oil composition. More particularly, it relates to a lubricating oil composition that can be used as hydraulic fluid, transmission oil, gear oil and engine oil for diesel, gasoline and gas engines.
  • Lubricating oil compositions such as hydraulic fluids, gear oils, automobile automatic and manual transmission oils and engine oils are typically made by incorporating additives such as corrosion inhibitors and oxidation inhibitors into base oils such as mineral oils or synthetic oils.
  • lubricating oil compositions are used for long periods, resistance to heat and oxidation is essential. Furthermore it is also essential that such lubricating oil compositions are not corrosive to metals.
  • lubricating oil compositions comprising zinc dialkyl dithiophosphate can be effective in preventing metal wear, sludges can readily form in such lubricating oil compositions because of thermal or oxidative degradation. Thus measures must be taken to prevent such problems.
  • Unexamined Japanese patent application No. 5-311187 describes heat resistant hydraulic fluid compositions which contain (A) a base oil having a sulphur content of 100 ppm or less, (B) 0.2 to 1 weight % of zinc dithiophosphate, (C) 0.2 to 1 weight % of an alkaline earth metal salt of salicylic acid and (D) 0.01 to 0.5 weight % of a water separating agent, based on the total composition weight.
  • Unexamined Japanese patent application No. 11-189781 describes lubricating oil compositions which comprise 0.005 to 0.3 weight parts as zinc of a zinc compound of dithiophosphoric acid having two hydrocarbon groups, 0.1 to 3 weight parts of a phosphorus type oxidation inhibitor, 0.1 to 2 weight parts of thiophosphate having 3 hydrocarbon groups and 0.1 to 2 weight parts of a dispersant, per 100 weight parts of a mineral oil and/or synthetic oil lubricating oil base oil.
  • lubricating oil compositions which have excellent oxidation inhibiting properties and thermal stability, which prevent the formation of sludge, and which can be used as hydraulic fluids, transmission oils, gear oils and engine oils (for diesel, gasoline and gas engines), which have low viscosity, and excellent fuel economy properties, antiwear properties and antiseize properties.
  • the present invention provides a lubricating oil composition
  • a base oil comprising mineral oil, synthetic oil or mixtures thereof
  • a lubricating oil composition comprising a base oil comprising mineral oil, synthetic oil or mixtures thereof,
  • Another embodiment of the present invention provides a lubricating oil composition
  • a base oil comprising mineral oil, synthetic oil or mixtures thereof,
  • a lubricating oil composition comprising a base oil comprising mineral oil, synthetic oil or mixtures thereof,
  • the base oil used in the lubricating oil compositions in the present invention may comprise any mineral oil, any synthetic oil or mixtures thereof.
  • Base oils of mineral origin may include those produced by solvent refining or hydroprocessing.
  • Mineral oils that may be conveniently used include paraffinic oils or naphthenic oils or normal paraffins, for example, those produced by refining lubricating oil cuts obtained by low pressure distillation of atmospheric residual oils which were in turn obtained by atmospheric distillation of crude oil.
  • mineral oils examples include those sold by member companies of the Royal Dutch/Shell Group under the designations "HVI”, “MVIN”, or "HMVIP".
  • synthetic oils that may be conveniently used include polyolefins such as poly- ⁇ -olefins, co-oligomers of ethylene and ⁇ -olefins and polybutenes, poly(alkylene glycol)s such as poly(ethylene glycol) and poly(propylene glycol), diesters such as di-2-ethylhexyl sebacate and di-2-ethylhexyl adipate, polyol esters such as trimethylolpropane esters and pentaerythritol esters, perfluoroalkyl ethers, silicone oils and polyphenyl ethers. Said synthetic oils may be conveniently used as single oils or as mixed oils.
  • Base oils of the type manufactured by the hydroisomerisation of wax such as those sold by member companies of the Royal Dutch/Shell Group under the designation "XHVI” (trade mark), may also be used.
  • the phrase "optionally substituted" is used to describe divalent metal phenates, divalent metal salts of salicylic acid and divalent metal salts optionally containing one or more alkyl group substituents.
  • said one or more metal detergents selected from optionally substituted divalent metal phenates, optionally substituted divalent metal salts of salicylic acid and optionally substituted divalent metal salts of sulphonic acid are preferably incorporated in the lubricating oil compositions of the present invention in a total amount in the range of from 0.3 to 5.0 weight %, per 100 weight % of lubricating oil composition.
  • the lubricating oil compositions as described herein comprise one or more metal detergents (A) which are divalent metal salts of salicylic acid having one or more alkyl group substituents.
  • the lubricating oil compositions of the present invention preferably comprise basic divalent metal detergents as component (A).
  • Basic calcium detergents are particularly preferable.
  • Such basic divalent detergents and, in particular, basic calcium detergents are especially effective in preventing synchroniser ring wear.
  • the one or more zinc dialkyl dithiophosphates used as component (B) in the lubricating oil compositions of the present invention have synchroniser ring wear inhibiting properties even when used alone, it has been surprisingly found in the present invention that the simultaneous use thereof with one or more metal detergents used as component (A) gives rise to enhanced effects.
  • the total base number of basic divalent metal detergents for use as component (A) is preferably in the range of from 50 to 350 mg KOH/g.
  • the wear inhibiting properties of the lubricating oil composition may not be observed.
  • the total base number of said basic divalent metal detergents exceeds 350 mg KOH/g, then there may be the risk of inhibiting the action of other additives in such a lubricating oil composition.
  • component (A) one or more basic metal detergents selected from (A-1) calcium sulphonates having a total base number in the range of from 50 to 350 mg KOH/g, (A-2) calcium phenates having a total base number in the range of from 50 to 350 mg KOH/g and (A-3) calcium salicylates having a total base number in the range of from 50 to 350 mg KOH/g, may be conveniently used in the lubricating oil compositions of the present invention.
  • Examples of calcium sulphonates that may be conveniently used include calcium salts of alkylaromatic sulphonic acids obtained by sulphonation of alkylaromatic compounds of molecular weight in the range of from 100 to 1500.
  • Alkylaromatic sulphonic acids that may be conveniently used to produce such salts include so-called petroleum sulphonic acids and synthetic sulphonic acids.
  • Examples of calcium phenates that may be conveniently used include calcium salts of alkylphenols having at least one linear or branched 4 to 30 carbon alkyl group, calcium salts of alkylphenol sulphides obtained by reacting the afore-mentioned alkylphenols with elemental sulphur or calcium salts of alkylphenol Mannich reaction products obtained by reacting the afore-mentioned alkylphenols and formaldehyde.
  • calcium salicylates examples include calcium salts of alkylsalicylic acids having at least one linear or branched 4 to 30 carbon alkyl group.
  • the total amount of said metal detergents in the lubricating oil compositions of the present invention is preferably in the range of from 0.3 to 5.0 weight %, per 100 weight % of lubricating oil composition.
  • the amount of component (A) in the lubricating oil compositions of the present invention is less than 0.3 weight %, per 100 weight % of lubricating oil composition, then the synchroniser ring wear inhibition improving properties of the lubricating oil composition due to the simultaneous use of component (A) may be poor.
  • the amount of component (A) in the lubricating oil compositions of the present invention exceeds 5.0 weight %, then this may be undesirable as the quantity of sludge and the like formed when the lubricating oil compositions degrade may increase.
  • said one or more zinc dialkyl dithiophosphates are preferably incorporated in the lubricating oil compositions of the present invention in a total amount in the range of from 0.3 to 5.0 weight %, per 100 weight % of lubricating oil composition.
  • the total amount of said one or more zinc dialkyl dithiophosphates (B) in the lubricating oil compositions of the present invention is more preferably in the range of from 0.5 to 3.0 weight %.
  • the wear-decreasing effect may not be seen, and there is a risk that the amount of wear will increase. If the total amount of said one or more zinc dialkyl dithiophosphates (B) exceeds 5.0 weight %, then there may be no further wear reducing effect and there is a risk that in a high temperature use environment oxidative degradation products may increase.
  • alkyl groups that may be conveniently employed in said one or more zinc dialkyldithiophosphates (B) include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, and octadecyl group.
  • the one or more fatty acid esters (C)(i) are preferably incorporated in the lubricating oil compositions of the present invention in a total amount in the range of from 0.3 to 5.0 weight %, per 100 weight % of lubricating oil composition.
  • the total amount of said one or more fatty acid esters (C)(i) in the lubricating oil compositions of the present invention is more preferably in the range of from 0.5 to 3.0 weight %, per 100 weight % of lubricating oil composition.
  • the amount of said one or more fatty acid esters (C)(i) is less than 0.3 weight %, then the wear-decreasing effect may not be seen, and there is a risk that the anti-seize properties may be decreased. If the amount of such one or more fatty acid esters (C)(i) exceeds 5.0 weight %, then there may be no further efficacy, and, depending on the circumstances, there may be a risk of impairing the action of other additives, and of decreasing the wear inhibition and anti-seize properties.
  • fatty acids which may be conveniently used in the manufacture of the one or more fatty acid esters (C)(i) include linear or branched saturated fatty acids such as heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, docosanoic acid, tricosanoic acid, tetracosanoic acid, pentacosanoic acid, hexacosanoic acid, heptacosanoic acid, octacosanoic acid, nonacosanoic acid and triacontanoic acid
  • esters of polyhydric alcohols with the aforesaid fatty acids are preferred.
  • Said polyhydric alcohols may conveniently be 3 to 6 carbon polyhydric alcohols or dimers and trimers thereof, and, specifically, polyhydric alcohols such as glycerine, trimethylolethane, trimethylolpropane, pentaerythritol, sorbitan, diglycerine, ditrimethylolethane, ditrimethylolpropane, dipentaerythritol, triglycerine, tritrimethylolethane, tritrimethylolpropane, tripentaerythritol and dimers and trimers thereof.
  • polyhydric alcohols such as glycerine, trimethylolethane, trimethylolpropane, pentaerythritol, sorbitan, diglycerine, ditrimethylolethane, ditrimethylolpropane, dipentaerythritol, triglycerine, tritrimethylolethane, tritrimethylolpropane, tripentaerythr
  • esters of polyhydric alcohols may be either so-called fully esterified substances wherein all the hydroxyl groups in the polyhydric alcohol are esterified or so-called partially esterified substances, wherein at least one hydroxyl group in the polyhydric alcohol is not esterified and still remains in hydroxyl group form.
  • a particularly preferred fatty acid ester (C)(i) is glycerine monooleate.
  • the lubricating oil compositions of the present invention preferably comprise further phosphorus compounds (C)(ii) (in addition to the one or more zinc dialkyldithiophosphates (B)).
  • said one or more further phosphorus compounds are preferably incorporated in the lubricating oil compositions of the present invention, in a total amount in the range of from 0.3 to 5.0 weight %, per 100 weight % of lubricating oil composition.
  • Examples of the one or more further phosphorus compounds of component (C)(ii) that may be conveniently used in the lubricating oil compositions of the present invention include one or more compounds selected from phosphate esters and derivatives thereof, phosphite esters and derivatives thereof.
  • Particularly preferred further phosphorus compounds (C)(ii) that may be conveniently used in the lubricating oil compositions of the present invention include one or more compounds selected from monoalkyl phosphates and monoalkyl thiophosphates (the alkyl groups in such phosphates and thiophosphates may be linear or branched) such as monobutyl phosphate, monopentyl phosphate, monohexyl phosphate, monoheptyl phosphate, monooctyl phosphate, monononyl phosphate, monodecyl phosphate, monoundecyl phosphate, monododecyl phosphate, monotridecyl phosphate, monotetradecyl phosphate, monopentadecyl phosphate, monohexadecyl phosphate, monoheptadecyl phosphate, monooctadecyl phosphate, monononadecyl phosphate,
  • Salts of the afore-mentioned phosphorus compounds (C) (ii) with amines and alkanolamines; or mixtures thereof may also be conveniently used in the lubricating oil compositions of the present invention.
  • the total amount of said one or more further phosphorus compounds is more preferably in the range of from 0.5 to 3.0 weight %, per 100 weight % of lubricating oil composition.
  • component (C) (ii) in such lubricating oil compositions is less than 0.3 weight % then its effects on the wear inhibition properties may not be seen. If the amount of component (C)(ii) in such lubricating oil compositions exceeds 5.0 weight % then there may be a risk that the corrosion properties and antifoam properties of the lubricating oil compositions will worsen.
  • the lubricating oil compositions of the present invention may also contain optional amounts of additional additives such as extreme pressure agents such as sulphurised oils or fats, antioxidants, anticorrosive agents and antifoam agents such as dimethylsilicones.
  • additional additives such as extreme pressure agents such as sulphurised oils or fats, antioxidants, anticorrosive agents and antifoam agents such as dimethylsilicones.
  • the lubricating oil compositions as described herein are characterised in that they have oxidation stability such that, in a test based on the JIS K 2514 ISOT test, the increase in acid value after 96 hours at 135°C is 0.50 mg KOH/g or less.
  • JIS K 2514 the internal combustion engine lubricating oil oxidation stability test (ISOT test) is a test which was originally developed as a method for assessment of the thermal stability of internal combustion engine lubricating oils. However, at present it is also widely used for the assessment of gear oils and the like.
  • a special beaker into which iron and copper catalysts had been introduced is placed in a temperature-controlled oil bath of the lubricating oil composition to be tested. Oxidative degradation is accelerated with entrainment of air by stirring for a specified number of revolutions.
  • the extent of degradation of the lubricating oil composition is investigated by measuring the viscosity, acid value and base value thereof and the amount of sludge that has been formed.
  • the acid value decreases somewhat in the early stages owing to consumption of the additives, and then abruptly increases when the acid neutralising action of any basic metal detergents present therein decreases as degradation of the lubricating oil composition accelerates.
  • a synchromesh mechanism in manual transmission gear change mechanisms, a synchromesh mechanism is used so as simultaneously to mesh pairs of gears with different rotation speeds.
  • the synchroniser rings and gear cones which are the main structural elements of this simultaneous meshing mechanism come into contact through being forcibly thrust together during a gear change, and as a result of the difference in revolution rates being brought to zero by the frictional forces produced, the meshing of the gears can be effected, completing the gear change.
  • the coefficient of friction between the synchroniser ring and gear cone is no less than a certain value.
  • the lubricating oil compositions as described herein are characterised in that, among the synchroniser properties, the coefficient of friction is 0.100 or more.
  • the inside of the synchroniser ring and the outside of the gear cone come into contact, but normally, in order to increase the coefficient of friction of the inside of the synchroniser ring, a large number of grooves are cut in the slide direction. If the antiwear properties of the lubricating oil composition used are poor, then the projections in this grooved area can become worn and deformed, affecting the coefficient of friction, and there is a risk that in some cases synchronisation will be impossible. Hence, the lubricating oil used must have such synchroniser antiwear properties.
  • the lubricating oil compositions as described herein are characterised in that, among the synchroniser properties, the amount of wear is 0.60 mm or less.
  • lubricating oil compositions which have excellent antioxidant properties and thermal stability, which prevent sludge formation, which have low viscosity, excellent fuel economy properties, antiwear properties and anti-seize properties and which can be conveniently used as hydraulic fluids, transmission oils, gear oils and engine oils (diesel, gasoline and gas) and the like.
  • the present invention further provides methods of lubricating hydraulic systems, gears, engines (diesel, gasoline and gas) and manual and automatic transmission systems using the lubricating oil compositions of the present invention.
  • the present invention further provides the use of the lubricating oil compositions of the present invention in order to reduce sludge formation and/or as anti-wear lubricating oil compositions, in particular the use of said lubricating oil compositions to reduce sludge formation and/or as anti-wear lubricating oil compositions in a manual transmission system.
  • the lubricating oil compositions of the present invention may be conveniently prepared by incorporating into a base oil comprising mineral oil, synthetic oil or mixtures thereof,
  • the acid numbers of the fresh oil (the lubricating oil composition used in the test) and degraded oil (the same lubricating oil composition after the test) were measured in accordance with JIS K 2501.
  • the method for assessment of the synchroniser friction properties was implemented under the following test conditions, using a synchroniser test machine.
  • the method for assessment of the synchroniser wear properties was implemented under the following test conditions, using a synchroniser test machine. Those where the amount of wear (change in gap between synchroniser ring and gear cone) was 0.60 mm or less were scored as a pass ( ⁇ ), and those where it exceeded 0.60 mm were scored as a fail ( ⁇ ).

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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)
EP05104732A 2004-06-01 2005-06-01 Lubricating oil composition Withdrawn EP1602711A1 (en)

Applications Claiming Priority (2)

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JP2004163792A JP2005343976A (ja) 2004-06-01 2004-06-01 潤滑油組成物
JP2004163792 2004-06-01

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EP1602711A1 true EP1602711A1 (en) 2005-12-07

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EP (1) EP1602711A1 (ja)
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GB2444131A (en) * 2006-11-22 2008-05-28 Afton Chemical Corp Lubricant compositions
WO2012064234A2 (ru) * 2010-11-12 2012-05-18 Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации Смазочная композиция высокотемпературного масла для теплонапряженных газотурбинных двигателей сверхзвуковой авиации
EP2687582A1 (en) * 2012-07-18 2014-01-22 Afton Chemical Corporation Lubricant compositions for direct injection engines

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FR2832160B1 (fr) * 2001-11-15 2005-01-14 Atofina PROCEDE DE TRAVAIL OU MISE EN FORME DES METAUX EN PRESENCE DE LUBRIFIANTS AQUEUX A BASE D'ACIDE METHANESULFONIQUE (AMS) ou D'UN SEL HYDROSOLUBLE D'AMS
JP5294614B2 (ja) * 2007-11-28 2013-09-18 コスモ石油ルブリカンツ株式会社 エンジン油組成物
CN103725351B (zh) * 2012-10-15 2015-07-01 中国石油化工股份有限公司 一种齿轮油组合物
JP5947745B2 (ja) * 2013-05-10 2016-07-06 コスモ石油ルブリカンツ株式会社 建設機械用油圧作動油組成物
JP6422260B2 (ja) * 2014-08-06 2018-11-14 出光興産株式会社 潤滑油組成物
JP6512684B2 (ja) * 2014-11-05 2019-05-15 コスモ石油ルブリカンツ株式会社 工業用油圧作動油組成物
CN105176648B (zh) * 2015-07-16 2017-09-01 四川三鼎润滑科技有限公司 一种燃气动力式天然气压缩机润滑油组合物
CN106479651A (zh) * 2016-08-30 2017-03-08 宝捷润滑油镇江有限公司 一种稳定的蓖麻油润滑油

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Cited By (9)

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GB2444131A (en) * 2006-11-22 2008-05-28 Afton Chemical Corp Lubricant compositions
GB2444131B (en) * 2006-11-22 2011-04-27 Afton Chemical Corp Lubricant compositions
GB2474986A (en) * 2006-11-22 2011-05-04 Afton Chemical Corp Lubricant compositions
GB2474986B (en) * 2006-11-22 2011-07-13 Afton Chemical Corp Lubricant compositions
WO2012064234A2 (ru) * 2010-11-12 2012-05-18 Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации Смазочная композиция высокотемпературного масла для теплонапряженных газотурбинных двигателей сверхзвуковой авиации
WO2012064234A3 (ru) * 2010-11-12 2012-08-30 Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации Смазочная композиция высокотемпературного масла для теплонапряженных газотурбинных двигателей сверхзвуковой авиации
RU2476587C2 (ru) * 2010-11-12 2013-02-27 Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации Смазочная композиция высокотемпературного масла для теплонапряженных газотурбинных двигателей сверхзвуковой авиации
EP2687582A1 (en) * 2012-07-18 2014-01-22 Afton Chemical Corporation Lubricant compositions for direct injection engines
AU2015101739B4 (en) * 2012-07-18 2016-09-01 Afton Chemical Corporation Lubricant compositions for direct injection engines

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CN1704463A (zh) 2005-12-07
US20050288193A1 (en) 2005-12-29

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