EP0768367B1 - Schmiermittelzusammensetzung - Google Patents

Schmiermittelzusammensetzung Download PDF

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Publication number
EP0768367B1
EP0768367B1 EP96307408A EP96307408A EP0768367B1 EP 0768367 B1 EP0768367 B1 EP 0768367B1 EP 96307408 A EP96307408 A EP 96307408A EP 96307408 A EP96307408 A EP 96307408A EP 0768367 B1 EP0768367 B1 EP 0768367B1
Authority
EP
European Patent Office
Prior art keywords
formula
oil
compound
lubricating
base oil
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.)
Expired - Lifetime
Application number
EP96307408A
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English (en)
French (fr)
Other versions
EP0768367A1 (de
Inventor
Noriyoshi Asahi Denka Kogyo K.K. Tanaka
Aritoshi Fukushima
Yukio Tatsumi
Kazuhisa Morita
Yoko Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adeka Corp
Original Assignee
Adeka Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP26434495A external-priority patent/JPH09104886A/ja
Priority claimed from JP28522895A external-priority patent/JPH09125082A/ja
Application filed by Adeka Corp filed Critical Adeka Corp
Publication of EP0768367A1 publication Critical patent/EP0768367A1/de
Application granted granted Critical
Publication of EP0768367B1 publication Critical patent/EP0768367B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C10M169/06—Mixtures of thickeners and additives
    • 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
    • C10M115/00—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof
    • C10M115/08—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof containing nitrogen
    • 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
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/02—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
    • 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
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/08—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to a carbon atom of a six-membered aromatic 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
    • C10M119/00—Lubricating compositions characterised by the thickener being a macromolecular compound
    • C10M119/24—Lubricating compositions characterised by the thickener being a macromolecular compound containing nitrogen
    • C—CHEMISTRY; METALLURGY
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    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/48—Carboxylic acids; Salts thereof having carboxyl groups bound to a carbon atom of a six-membered aromatic ring
    • C10M129/54—Carboxylic acids; Salts thereof having carboxyl groups bound to a carbon atom of a six-membered aromatic ring containing hydroxy groups
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    • C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
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    • C10M135/08—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium containing a sulfur-to-oxygen bond
    • C10M135/10—Sulfonic acids or derivatives thereof
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    • C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
    • C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
    • C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
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    • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
    • C10M137/04—Phosphate esters
    • C10M137/10—Thio derivatives
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    • C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
    • C10M141/08—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic sulfur-, selenium- or tellurium-containing compound
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    • C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C—CHEMISTRY; METALLURGY
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/08—Inorganic acids or salts thereof
    • C10M2201/082—Inorganic acids or salts thereof containing nitrogen
    • C10M2201/083—Inorganic acids or salts thereof containing nitrogen nitrites
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    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • C10M2201/103—Clays; Mica; Zeolites
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    • C10M2215/08—Amides [having hydrocarbon substituents containing less than thirty carbon atoms]
    • C10M2215/0813—Amides [having hydrocarbon substituents containing less than thirty carbon atoms] used as thickening agents
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    • C10M2215/10—Amides of carbonic or haloformic acids
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    • C10M2215/10—Amides of carbonic or haloformic acids
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    • C10M2215/102—Ureas; Semicarbazides; Allophanates
    • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening material
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    • C10M2215/22—Heterocyclic nitrogen compounds
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    • C10N2040/42—Flashing oils or marking oils
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    • C10N2040/50—Medical uses

Definitions

  • This invention relates generally to lubricating compositions and has particular reference to a lubricant composition containing a base lubricating oil and one or more molybdenum compounds and having a content of total alkali metal containing sodium below 100ppm.
  • An engine oil generally contains, to maintain desired performance, various additives such as friction regulating additives, antioxidants, cleaning agents, dispersants, extreme pressure agents, viscosity index improvers, pour point depressants, antiwear agents and the like.
  • various additives such as friction regulating additives, antioxidants, cleaning agents, dispersants, extreme pressure agents, viscosity index improvers, pour point depressants, antiwear agents and the like.
  • 5-508188 discloses a lubricating composition in which an overbasified alkali metal salt such as of a sodium, potassium, lithium or like metal of an acidic organic compound, a dispersant, dihydrocarbyl dithiophosphate and an antioxidant are incorporated to reduce deterioration and prevent wear of the engine, and to present sludge formation.
  • an overbasified alkali metal salt such as of a sodium, potassium, lithium or like metal of an acidic organic compound
  • a dispersant, dihydrocarbyl dithiophosphate and an antioxidant are incorporated to reduce deterioration and prevent wear of the engine, and to present sludge formation.
  • organomolybdenum compounds are now being seen as essential additives.
  • Japanese Patent Laid-Open No. 5-279686 suggests that the friction characteristics of an engine oil can be improved, without wear resistance and other important qualities impaired, by formulation of an organomolybdenum compound, a fatty ester, a metallic cleaning agent (calcium sulfonate, magnesium sulfonate, calcium phenate and magnesium phenate), an ashless cleaning dispersant (benzylamine, its boron derivative, an imide of alkenyl succinate and its boron derivative) and an antiwear agent [zinc dithiophosphate (ZDTP) and zinc dithiocarbamate (ZDTC)].
  • an organomolybdenum compound a fatty ester
  • a metallic cleaning agent calcium sulfonate, magnesium sulfonate, calcium phenate and magnesium phenate
  • an ashless cleaning dispersant benzylamine, its boron derivative, an imide of alkenyl succinate and its boron derivative
  • an antiwear agent zinc di
  • CVJ Constant velocity joints
  • FF and 4WD vehicles or FR vihicles with indepedent suspension are being widely used for the rapidly growing numbers of FF and 4WD vehicles or FR vihicles with indepedent suspension.
  • CVJ's are used to transmit engine-power to the wheels, smooth power transmission is also required even in when the steering wheel has been turned left or right.
  • CVJ's are generally a plunger type joint that is axially slidable on the engine side and a fixed type joint that is fixed axially on the wheel side.
  • the plunger joint involves sliding resistance arising in the axial direction from its rolling and sliding movements as it reciprocates, thus leading to undesirable noise and vibration in an automatic transmission car, namely vibration during idling, rolling during startup and acceleration of the car, and beat frequency and entrapped noises from the car at certain speeds.
  • Vibration damping is now a significant problem in keeping with the demand for more comfortable quiter, automotive vehicles. Consequently, focus has been centered not only on improving the joints themselves
  • Molybdenum disulfide a sulfur-phosphorus type additive, a lead type additive or the like has heretofore been employed as an additive to be incorporated in a grease composition for use with constant velocity joints.
  • organomolybdenum compounds have been put to use in the production of a grease exhibiting damped vibration that is a key quality in the art, i.e., a grease with low friction performance.
  • Japanese Patent Laid-Open No. 6-184583 discloses a grease for use with constant velocity joints and also a grease composition for such joints wherein a urea grease is formulated with molybdenum dithiophosphate, molybdenum dithiocarbamate and ZDTC.
  • Engine oils are usually composed of a wide variety of additives as already discussed. In such oils, the additives tend to interact in some cases with each other and thus fail to impart their respective inherent properties.
  • EPO 638 582 describes a powdery molybdenum oxysulphide dithiocarbamate composition which exhibits low corrosive action and excellent lubricating properties.
  • JP 51080825 describes a high pressure additive for lubricants prepared from molybdenum trisulphide, sec.amine and carbon disulphide.
  • the present invention seeks to provide a lubricating composition suitable for use as a lubricant oil.
  • the present invention provides a lubricating composition
  • a lubricating composition comprising a base oil, one or more organomolybdenum compounds selected from the group consisting of sulfurized oxymolybdenum dithiocarbamates represented by Formula (1) wherein R 1 to R 4 are each a hydrocarbyl group, X 1 is an oxygen or sulfur atom and the atomic ratio of oxygen to sulfur is from 1:3 to 3:1; and sulfurized oxymolybdenum dithiophosphates represented by Formula (2) wherein R 5 to R 8 are each a hydrocarbyl group, and X 2 is an oxygen or sulfur atom and the atomic ratio of oxygen to sulfur is from 1:3 to 3:1; and one or more organozinc compounds selected from the group consisting of zinc dithiophoshates represented by Formula (3) wherein a is 0 or 1/3, and R 9 to R 10 are each a hydrocarbyl group; and zinc dithiocarbamates represented by Formula (4) wherein R 11 and R 12 are each a hydrocar
  • an amount of the organomolybdenum compound added ranges from 0.005 to 0.2 percent by weight in terms of molybdenum based on the weight of the base oil for lubricating oil, and an amount added to the organozinc compound ranges from 0.005 to 2 percent based on the weight of the base oil for lubricating oil.
  • the lubricating composition according to the present invention contains said organomolybdenum compound as an essential component.
  • the total content of an alkali metal including sodium in the composition should be set below 100 ppm, preferably below 50 ppm.
  • alkali metals mentioned herein are those classed among Group I of the Periodic Table in which lithium, sodium, potassium, rubidium, cesium and francium are included.
  • an alkali metal such as sodium becomes introduced into the resultant lubricating composition in cases where such alkali metal has not been completely removed after it was employed as a catalyst or starting material in separating and purifying or synthesizing the desired base lubricating oil.
  • alkali metals or their salts are not being completely eliminated subsequent to their use as a catalyst or starting material in the syntheses of various additives as commonly practiced frequently.
  • Alkali metal compounds for use as starting materials and catalysts are exemplified by basic reagents such as alkali hydroxides, alkali sulfides, alkali hydrosulfides, alkali oxides, alkali alcoholates and the like, and reducing reagents such as alkali metals, alkali metal halides, alkali aluminum halides, alkali boron halides and the like.
  • the lubricating composition of the present invention is applied as a lubricating oil composition
  • additives such as for example an alkali metal type cleaning agent might often be added.
  • the use of such particular additive is not preferable in the practice of the present invention.
  • the organomolybdenum compounds that can be used in the present invention include, in addition to MoDTC and MoDTP, reaction products of molybdic acid with amines, oxymolybdenum organophosphates, (sulfurized) oxymolybdenum xanthate, reaction products of molybdenum with basic nitrogens, molybdenum-containing dispersants and the like.
  • MoDTC and MoDTP among these compounds are noticeably affected by the sodium content in the lubricating composition.
  • MoDTC is represented by the compounds of Formula (1) indicated above
  • MoDTP is represented by the compounds of Formula (2) shown above.
  • R 1 to R 4 and R 5 to R 8 are all hydrocarbyl groups that may be by nature saturated, unsaturated, chained, branched-chain or straight-chain. Such hydrocarbyl groups may be of an aliphatic, alicyclic or aromatic nature in which alkyl, alkenyl, alkylaryl, cycloalkyl, cycloalkenyl groups and the like are included.
  • Suitable alkyl groups are chosen from among methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tertiary butyl, pentyl, isopentyl, neopentyl, tertiary pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tridecyl, isotridecyl, myristyl, palmityl, stearyl, eicosyl, docosyl, tetracosyl, triacontyl, 2-octyl-dodecyl, 2-dodecylhexadecyl, 2-tetradecyloctadecyl, branched monomethyl-isostearyl groups and the like.
  • Suitable alkenyl groups are chosen from among vinyl, ally, propenyl, isopropenyl, butenyl, isobutenyl, pentenyl, isopentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tetradecenyl, oleyl groups and the like.
  • Suitable alkylaryl groups are chosen from among phenyl, tolyl, xylyl, cumenyl, mesithyl, benzyl, phenethyl, styryl, cinnamyl, benzhydryl, trityl, ethylpheny, propylphenyl, butylphenyl, pentylphenyl, hexylphenyl, heptylphenyl, octylphenyl, nonylphenyl, alpha-naphthyl, beta-naphthyl groups and the like.
  • Suitable cycloalkyl and cycloalkenyl groups are chosen from among cyclopentyl, cyclohexyl, cycloheptyl, methylcyclopentyl, methylcyclohexyl, methylcycloheptyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, methyl-cyclopentenyl, methylcyclohexenyl, methylcycloheptenyl groups and the like.
  • the substituent groups, R 1 to R 8 may be the same or different; that is, R 1 to R 4 may be identical to, or different from R 5 to R 8 .
  • the base oil is a base oil for lubricating oil, i.e., where the lubricating composition is a lubricating oil composition
  • an alkyl group of 8 to 13 carbon atoms is preferred as R 1 to R 4 that are in MoDTC and an alkyl group of 6 to 13 carbon atoms as R 5 to R 8 that are in MoDTP.
  • R 1 to R 4 are different from each other, is preferable when the resultant lubricating oil composition is to have long drain or long service life.
  • Each of the X 1 in Formula (1) and X 2 in Formula (2) is an oxygen or sulfur atom and may be identical or different. Too small a number of oxygen atoms invites insufficient lubricity, and too large a number of sulfur atoms makes the finished lubricating composition highly corrosive.
  • the atomic ratio of oxygen to sulfur is from 1:3 to 3:1.
  • the organomolybdenum compounds specified above can be used singly or in combination. Though not particularly restricted, the amount of such compound added is of itself limited to gain adequate lubricity and to prevent adverse sludge.
  • the organomolybdenum compound may be used in an amount of 0.005 to 0.2 percent by weight in terms of molybdenum, preferably of 0.01 to 0.1 percent by weight, based on a selected base oil.
  • MoDTC and MoDTP tend to contain a greater content of alkali metals, particularly of sodium metals since they are synthesized usually with the use of an alkali metal compound, especially of sodium hydrosulfide.
  • MoDTC and MoDTP for use in the lubricating composition of the present invention be derived for example by the production methods stated below.
  • MoDTC can preferably be produced by the method disclosed for instance in Japanese Patent Laid-Open No. 56-12638 .
  • molybdenum trioxide or molybdate salt is reacted with an alkali sulfide or alkali hydrosulfide, followed by addition of carbon disulfide and a secondary amine, and the reaction is continued at an appropriate temperature.
  • MoDTP can preferably be produced by the methods taught for instance in Japanese Patent Laid-Open Nos. 61-87690 and 61-106587 . Both methods are contrived to react an alkali sulfide or alkali hydrosulfide, followed by addition of P 2 S 5 and a secondary amine, and the reaction is continued at an appropriate temperature.
  • the lubricating composition of the present invention incorporates either one or both of ZDTP and ZDTC as organozinc compounds.
  • ZDTP is represented by the compounds of Formula (3) as previously shown, and R 9 and R 10 in that formula are each hydrocarbyl groups similar to R 1 to R 8 .
  • ZDTC is represented by the compounds of Formula (4) also indicated above, and R 11 and R 12 are each hydrocarbyl groups similar to R 1 to R 8 .
  • R 9 and R 10 are each hydrocarbyl groups and may be the same or different. Both of the substituent groups may be selected, like R 1 to R 8 , from alkyl, alkenyl, alkylaryl groups and the like, among which an alkyl group of 3 to 14 carbon atoms is particularly preferred.
  • R 9 and R 10 of one or more ZDTP compounds to be used more than 60% are preferably occupied by a primary alkyl group.
  • the remaining quantity of less than 40% may be a secondary alkyl and/or a tertiary alkyl group.
  • a is 0 or 1/3, and the resulting compound is termed a "neutral ZnDTP" when a is zero and a “basic ZnDTP” when a is 1/3.
  • ZDTP to be used in the present invention can be obtained by the method disclosed for instance in Japanese Patent Laid-Open No. 48-37251 . That is, P 2 S 5 is reacted with a given alcohol to form an alkyl-substituted dithio-phosphoric acid which is then neutralized or basified with zinc oxide, whereby a zinc salt is prepared.
  • R 11 and R 12 are each hydrocarbyl groups and may be the same or different.
  • the two substituent groups are selected, like R 1 to R 8 , from alkyl, alkenyl, alkylaryl groups and the like, among which an alkyl group of 3 to 14 carbon atoms is particularly preferred.
  • One or more members of the above organozinc compounds are used in the lubricating composition of the present invention.
  • this composition When this composition is applied as a lubricating oil composition, no particular restriction is placed on the amount of the organozinc compound to be added. Too small an amount of such compound, however, results in an insufficient level of extreme pressure performance. Conversely, too large an amount of the compound is responsible for impaired properties of extreme pressure performance and oxidation resistance.
  • ZDTP as it contains phosphorus it tends to contaminate catalysts employed inexhaust gas-treating systems.
  • the organozinc compound is therefore added in an amount of 0.005 to 2% by weight, preferably of 0.01 to 1% by weight, based on the weight of the base lubricating oil selected.
  • the organozinc compound contributes to improvements in extreme pressure performance and oxidation resistance of the lubricant composition.
  • the lubricating composition of the present invention is comprised of a base oil, one or more organomolybdenum compounds as specified above and, one or more organozinc compounds as previously stated.
  • the base oil is a base oil for lubricating oil.
  • the base oil for lubricating oil that can be used as the base oil may be mineral or synthetic oils.
  • mineral oil is meant such derived from cracking of crude oil and from subsequent distillation and refining. Included in the term mineral oil is paraffinic oils, naphthenic oils and oils made available from hydrogenation and solvent refining thereof.
  • synthetic oil denotes a chemically synthesized lubricating oil and includes poly-alpha-olefins, polyisobutylene (polybutenes), diesters, polyol esters, phosphate esters, silicate esters, polyalkylene glycols, polyphenylethers, silicones, fluorine compounds, alkyl benzenes and the like.
  • the lubricating composition of the present invention is used as an engine oil composition
  • it is preferred to select as the base a mineral oil such as hydrogenated oils and hydrogenation refined oils, synthetic oils such as poly-alpha-olefins, diesters, polyol esters and the like.
  • lubricating composition of the present invention is used as a lubricating oil composition
  • numerous known additives may be incorporated which are chosen from friction relaxants such as higher fatty acids, higher alcohols, amines, esters and the like, extreme pressure agents such as of a sulfur, chlorine, phosphorus or organometallic type or the like, antioxidants such as phenols, amines and the like, dispersants such as imide succinates, benzyl-amines and the like, viscosity index improvers such as high-molecular poly(meth)acrylates, polyisobutylenes, polystyrenes, ethylene-propylene copolymers, styrene-isobutylene copolymers and the like, defoamers such as esters, silicones and the like, rust preventives, pour point depressants and molybdic acid amines.
  • the amount of each of such additive to be added is within the range commonly accepted in the art.
  • the lubricating oil composition having the formulation as stated above can be used as a lubricant for internal combustion engines such as engines for vehicles inclusive of automobiles, 2-cycle engines, aircraft engines, marine engines, locomotive engines (irrespective of whether the combustion system is gasoline, diesel, gas or turbine), as an automatic transmission fluid, as a trans axle lubricant, as a gear lubricant and as a metal working lubricant.
  • internal combustion engines such as engines for vehicles inclusive of automobiles, 2-cycle engines, aircraft engines, marine engines, locomotive engines (irrespective of whether the combustion system is gasoline, diesel, gas or turbine), as an automatic transmission fluid, as a trans axle lubricant, as a gear lubricant and as a metal working lubricant.
  • a novel lubricating oil composition which exhibits good performance of friction reduction.
  • Base oil for lubricating oil is Base oil for lubricating oil
  • the sodium content of each of the above components was measured by an ICP process after incineration. No alkali metals other than a sodium metal were detected in the base oil for lubricating oil, Mo compounds 1 to 4, ZDTP, ZDTC or cleaning agents 1 to 3.
  • the resulting lubricant compositions were examined for their coefficients of friction.

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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)

Claims (2)

  1. Schmiermittelzusammensetzung umfassend ein Basisöl, eine oder mehrere Organomolybdänverbindungen ausgewählt aus der Gruppe bestehend aus sulfurierten Oxymolybdändithiocarbamaten, die durch die Formel (I)
    Figure imgb0009
     dargestellt sind, wobei R1 bis R4 jeweils eine Hydrocarbylgruppe sind, X1 ein Sauerstoff - oder Schwefelatom ist und das Atomverhältnis von Sauerstoff zu Schwefel 1:3 bis 3:1 beträgt; und sulfurierten Oxymolybdändithiophosphaten, die durch die Formel (2)
    Figure imgb0010
     dargestellt sind, wobei R5 bis R8 jeweils eine Hydrocarbylgruppe sind und X2 ein Sauerstoff- oder Schwefelatom ist und das Atomverhältnis von Sauerstoff zu Schwefel 1:3 bis 3:1 beträgt; und eine oder mehrere Organozinkverbindungen ausgewählt aus der Gruppe bestehend aus Zinkdithiophosphaten, die durch die Formel (3)
    Figure imgb0011
     dargestellt sind, wobei a 0 oder 1/3 beträgt und R9 bis R10 jeweils eine Hydrocarbylgruppe sind; und Zinkdithiophosphaten, die durch die Formel (4)
    Figure imgb0012
     dargestellt sind, wobei R11 bis R12 jeweils eine Hydrocarbylgruppe sind; und Reinigungsmittel ausgewählt unter Sulfonaten, Phenaten und Carboxylaten von neutralen oder stark basischen Erdalkalimetallen;
    dadurch gekennzeichnet, dass die Zusammensetzung einen Gesamtgehalt an Alkalimetallen, einschließlich eines Natriummetalls, von weniger als 100 ppm aufweist, und wobei das Basisöl ein Basisöl für Schmieröl ist.
  2. Schmiermittelzusammensetzung nach Anspruch 1, wobei eine Menge der hinzugegebenen Organomolybdänverbindung im Bereich von 0,005 bis 0,2 Gewichtsprozent, als Molybdän ausgedrückt, auf das Gewicht des Basisöl für Schmieröl bezogen, liegt und eine zu der Organozinnverbindung hinzugegebene Menge im Bereich von 0,005 bis 2 Prozent, auf das Gewicht des Basisöls für Schmieröl bezogen, liegt.
EP96307408A 1995-10-12 1996-10-11 Schmiermittelzusammensetzung Expired - Lifetime EP0768367B1 (de)

Applications Claiming Priority (4)

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JP26434495A JPH09104886A (ja) 1995-10-12 1995-10-12 低アルカリ金属潤滑油組成物
JP264344/95 1995-10-12
JP285228/95 1995-11-01
JP28522895A JPH09125082A (ja) 1995-11-01 1995-11-01 低アルカリ金属グリース組成物

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JPS5180825A (ja) 1975-01-14 1976-07-15 Asahi Denka Kogyo Kk Ganmoribudenkagobutsunoseizohoho
US4098705A (en) * 1975-08-07 1978-07-04 Asahi Denka Kogyo K.K. Sulfur containing molybdenum dihydrocarbyldithiocarbamate compound
JPS59122597A (ja) * 1982-11-30 1984-07-16 Honda Motor Co Ltd 潤滑油組成物
JPS6187690A (ja) * 1984-10-05 1986-05-06 Asahi Denka Kogyo Kk ジアルキルホスホロジチオン酸硫化オキシモリブデンの製造方法
EP0435745B1 (de) * 1989-12-27 1993-11-10 Nissan Motor Company Limited Schmierfett für homokinetische Kupplung
JPH05186787A (ja) * 1992-01-09 1993-07-27 Tonen Corp 潤滑油組成物
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JPH0657284A (ja) * 1992-08-05 1994-03-01 Kyodo Yushi Kk 等速ジョイント用グリース組成物
JPH06184583A (ja) * 1992-10-22 1994-07-05 Nippon Seiko Kk 等速ジョイント用グリース及び等速ジョイント
JP3495764B2 (ja) 1993-08-13 2004-02-09 旭電化工業株式会社 粉末状の硫化オキシモリブデンジチオカルバミン酸組成物及びその製法並びにこれを含有するグリース組成物
JP3659598B2 (ja) * 1995-02-15 2005-06-15 旭電化工業株式会社 硫化オキシモリブデンジチオカーバメートの製造方法

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