EP0677571A1 - Composition d'huile de lubrification de transmission aux roues motrices - Google Patents

Composition d'huile de lubrification de transmission aux roues motrices Download PDF

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Publication number
EP0677571A1
EP0677571A1 EP94903092A EP94903092A EP0677571A1 EP 0677571 A1 EP0677571 A1 EP 0677571A1 EP 94903092 A EP94903092 A EP 94903092A EP 94903092 A EP94903092 A EP 94903092A EP 0677571 A1 EP0677571 A1 EP 0677571A1
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EP
European Patent Office
Prior art keywords
lubricating oil
oil composition
final drive
phosphorodithioate
sulfurized oxymolybdenum
Prior art date
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EP94903092A
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German (de)
English (en)
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EP0677571A4 (fr
Inventor
Noboru Tonen Corporation Tajima
Koji Tonen Corporation Takemitsu
Naoto Tonen Corporation Ohtsuka
Masaaki Tonen Corporation Shiomi
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Tonen General Sekiyu KK
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Tonen Corp
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Publication date
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Publication of EP0677571A1 publication Critical patent/EP0677571A1/fr
Publication of EP0677571A4 publication Critical patent/EP0677571A4/fr
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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
    • C10M141/10—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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    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
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    • 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
    • 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
    • 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
    • C10M2223/041—Triaryl phosphates
    • 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
    • C10M2223/042—Metal 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
    • C10M2223/043—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
    • C10M2223/049—Phosphite
    • 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
    • C10M2223/10—Phosphatides, e.g. lecithin, cephalin
    • 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
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/06—Organic compounds derived from inorganic acids or metal salts
    • C10M2227/061—Esters derived from boron
    • 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/12—Groups 6 or 16
    • 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
    • C10N2040/02—Bearings

Definitions

  • the present invention relates to a novel lubricating oil composition for use in a final drive, and more particularly to a lubricating oil composition for use in a final drive for use in a car of a front- engine and rear-wheel-drive system or the like, which composition improves the efficiency of transmission in a differential gear under various conditions such as the input torque, the input number of revolutions and the temperature of the oil, as compared with the conventional ones comprising S-containing and P-containing additives blended therein.
  • the final drive of a car has a function (1) of further decreasing a driving force decreased by a transmission and rectangularly changing the direction of the force, and a differential function (2) of securing smooth driving even when a difference in revolution arises between right and left driving wheels at the time of turning the car around.
  • the former function is performed by a decelerator, while the latter function is performed by a differential gear.
  • the decelerator is constituted of a decelerating pinion and a decelerating gear wheel. Hypoid gears are generally used as such decelerating pinion and gear wheel.
  • the differential gear (differential) is constituted of two or four differential pinions and two differential gear wheels engaged therewith, which are built in a differential gear box.
  • the differential pinions which are connected to the differential gear box by means of a shaft, is capable of orbital revolution together with the gear box while revolving on its own axis around the shaft. Consequently, a difference in revolution between the interior and exterior driving wheels can be mechanistically absorbed even if such a difference arises when the car is turned around.
  • hypoid gears of a gear transmission mechanism as is used in the foregoing final drive of the car are exposed to severe conditions such as a high speed of revolution and a heavy load, leading to the necessity for a gear oil excellent in seizing-proofing and abrasion-proofing properties.
  • a gear oil comprising a base oil admixed with a sulfur-containing extreme-pressure additive such as an olefin sulfide or an alkyl sulfide and a phosphorus-containing extreme-pressure additive such as a phosphoric ester, a phosphorous ester or an alkylamine salt of a phosphoric ester, wherein the sulfur-containing extreme-pressure additive improves the above-mentioned seizing-proofing properties while the phosphorus-containing extreme-pressure additive improves the above-mentioned abrasion-proofing properties.
  • a sulfur-containing extreme-pressure additive such as an olefin sulfide or an alkyl sulfide
  • a phosphorus-containing extreme-pressure additive such as a phosphoric ester, a phosphorous ester or an alkylamine salt of a phosphoric ester
  • an object of the present invention is to provide a lubricating oil composition for use in a final drive for use in a car of a front-engine and rear-wheel-drive system or the like, which composition improves the efficiency of transmission in a differential gear under various conditions such as the input torque, the input number of revolutions and the temperature of the oil and hence decreases the cost of fuel, as compared with the conventional ones comprising S-containing and P-containing additives blended therein.
  • a lubricating oil composition comprising a lubricant base oil, and a sulfurized oxymolybdenum organophosphorodithioate, a sulfur-containing extreme-pressure additive and a phosphorus-containing extreme-pressure additive each in a given amount.
  • the present invention has been completed based on such a finding.
  • a lubricating oil composition for use in a final drive characterized by comprising lubricant base oil(s); (A) 1 to 10 wt. %, based on the total weight of the composition, of sulfurized oxymolybdenum organophosphorodithioate(s) represented by the general formula [1]: [(R1O)(R2O)(S)P-S-]2-MO2S p O q [1] (wherein R1 and R2, which may be either the same or different from each other, are an alkyl or alkenyl group having 4 to 18 carbon atoms; and p and q are each a positive integer, provided that the sum of both is 4); (B) 3 to 15 wt.
  • % based on the total weight of the composition, of at least one sulfur-containing extreme-pressure additive selected from among olefin sulfides and alkyl sulfides; and (C) 0.1 to 5 wt. %, based on the total weight of the composition, of at least one phosphorus-containing extreme-pressure additive selected from among phosphoric esters, phosphorous esters, and alkylamine salts of phosphoric esters.
  • Fig. 1 is a schematic diagram of an apparatus as used in the LFW-1 friction test.
  • Fig. 2 is graphs showing the relationships between the input torque and the efficiency of transmission in the cases of respectively using a lubricating oil according to the present invention and an S-P blend oil.
  • Examples of the base oil to be used in the lubricating oil composition of the present invention include common base oils for use in the conventional lubricating oils, such as mineral and synthetic oils.
  • mineral oils examples include 60 neutral oil, 100 neutral oil, 150 neutral oil, 300 neutral oil, and 500 neutral oil, which are prepared by refining with a solvent or through hydrogenation; and low-pour-point base oils improved in fluidity at low temperatures by removing wax from the above-enumerated base oils. These mineral oils may be used either alone or in mixture wherein at least two kinds of mineral oils are mixed together in a suitable proportion.
  • examples of the synthetic oils include ⁇ -olefin oligomers, diesters, polyol esters, and polyglycol esters. These base oils may usually be used alone, but may also be used in mixture with mineral oil(s) as mentioned above. In the latter case, the mixing weight ratio of a synthetic oil to mineral oil(s) is, for example, in the range of 80:20 to 20:80.
  • the viscosity at 100 °C of the base oil to be used in the composition of the present invention is preferably in the range of 3 to 20 cSt.
  • the component (A) to be used in the lubricating oil composition of the present invention is sulfurized molybdenum organop hosphorodithioate(s) (MoDTP) represented by the general formula [1]: [(R1O)(R2O)(S)P-S-]2-MO2S p O q [1]
  • R1 and R2 which may be either the same or different from each other, are an alkyl or alkenyl group having four to 18 carbon atoms, which group may be linear, branched, or cyclic; and p and q are each a positive integer, provided that the sum of both is four.
  • R1 and R2 examples include butyl, pentyl, hexyl, cyclohexyl, octyl, 2-ethylhexyl, decyl, lauryl, myristyl, palmityl, stearyl, butenyl, pentenyl, octenyl and oleyl groups.
  • MoDTP represented by the above-mentioned general formula [1] include sulfurized oxymolybdenum butyl phosphorodithioate, sulfurized oxymolybdenum pentyl phosphorodithioate, sulfurized oxymolybdenum hexyl phosphorodithioate, sulfurized oxymolybdenum octyl phosphorodithioate, sulfurized oxymolybdenum 2-ethylhexyl phosphorodithioate, sulfurized oxymolybdenum decyl phosphorodithioate, sulfurized oxymolybdenum lauryl phosphorodithioate, sulfurized oxymolybdenum stearyl phosphorodithioate, sulfurized oxymolybdenum butenyl phosphorodithioate, sulfurized oxymolybdenum pentenyl phosphorodithioate, sulfurized oxymolybdenum 2-ethylhexeny
  • the amount of MoDTP to be blended in the composition is in the range of 1 to 10 wt. %, preferably 1 to 7 wt. %, based on the total weight of the composition.
  • the amount is smaller than 1 wt. %, no effect of improving the efficiency of transmission in a differential gear under various conditions such as the input torque, the input number of revolutions and the temperature of the oil can sufficiently be exhibited.
  • it exceeds 10 wt. % the resulting improvement in the above-mentioned effect is not worth an increase in the amount, and troubles such as sludge are liable to be caused.
  • the component (B) to be used in the lubricating oil composition of the present invention is at least one sulfur-containing extreme-pressure additive selected from among olefin sulfides and alkyl sulfides.
  • the olefin sulfides include compounds represented by the general formula [2]: R3-Sx-R4 [2] In the above-mentioned general formula [2], R3 is an alkenyl group having 4 to 12 carbon atoms; R4 is an alkyl or alkenyl group having 4 to 12 carbon atoms; R3 and R4 are each linear, branched, or cyclic; and x is an integer of 1 to 8.
  • examples of the alkyl sulfides include compounds represented by the general formula [3]: R5-Sy-R6 [3]
  • R5 and R6, which may be either the same or different from each other are each an alkyl group having 4 to 12 carbon atoms, which group may be linear, branched, or cyclic; and y is an integer of 1 to 8.
  • Representative examples of the alkyl sulfides include di-t-butyl disulfide and di-t-butyl trisulfide.
  • these sulfur-containing extreme-pressure additives may be used either alone or in combination of two or more kinds thereof as the component (B), the amount of which to be blended therein is in the range of 3 to 15 wt. %, preferably 5 to 10 wt. %, based on the total weight of the composition.
  • the sulfur-containing extreme-pressure additive generally forms a sulfurized skin in a frictional surface, and hence functions in such a way as to improve the load resistance performance of the base oil(s).
  • the above-mentioned amount is smaller than 3 wt. %, the foregoing functional effect cannot sufficiently be exhibited to make the resulting composition unsuitable as a gear oil for use in a car.
  • it exceeds 15 wt. % the resulting improvement in the foregoing effect is not worth an increase in the amount, while a difficulty is encountered in dissolving the increased amount of the component (B) in the base oil(s).
  • the component (C) to be used in the lubricating oil composition of the present invention is at least one phosphorus-containing extreme-pressure additive selected from among phosphoric esters, phosphorous esters, and alklyamine salts of phosphoric esters.
  • R7, R8 and R9 which may be either the same or different from each other, are each a linear, branched or cyclic alkyl or alkenyl group having four to 30 of carbon atoms, preferably 20 or less of carbon atoms, an aryl group, or an alkylaryl group.
  • phosphoric and phosphorous esters include oleyl acid phosphate in the form of a mixture of (C18)H35O)P(OH) 2O and (C18H35O)2-P(OH)O, and dioleyl hydrogen phosphite represented by the formula: (C18H35O)2P(OH).
  • an alkylamine salt of a phosphoric ester is a reaction product of the phosphoric ester with the alkylamine, examples of which are the ones represented by the general formula [4]: (R10) m P(O)(OH)3- m ⁇ [NH n (R11)3- n ]3- m [4]
  • R10 is a linear, branched or cyclic alkyl or alkenyl group having four to 30 of carbon atoms, preferably 20 or less of carbon atoms, an aryl group, or an alkylaryl group
  • R11 is a linear, branched or cyclic alkyl or alkenyl group having four to 30 of carbon atoms, preferably 20 or less of carbon atoms
  • m and n are each 1 or 2
  • a plurality of R10, if any, may be either the same or different from each other; and a plurality of R11
  • examples of R10 include butyl, hexyl, cyclohexyl, octyl, 2-ethylhexyl, decyl, lauryl, myristyl,palmityl, stearyl, oleyl, eicosyl, phenyl and cresyl groups; and examples of R11 include butyl, hexyl, cyclohexyl, octyl, 2-ethylhexyl, decyl, lauryl, myristyl, palmityl, stearyl, oleyl and eicosyl groups.
  • alkylamine salt of the phosphoric ester represented by the above-mentioned general formula [4] include oleylamine salt of diisooctyl acid phosphate [a reaction product of (i-C8H17O)2P(OH)O with (C18H35)NH2], and oleylamine salt of 2-ethylhexyl acid phosphate.
  • the above-mentioned phosphorus-containing extreme-pressure additives may be used either alone or in combination of two or more kinds thereof.
  • the amount of the phosphorus-containing extreme-pressure additive(s) to be blended in the composition is in the range of 0.1 to 5 wt. %, preferably 0.5 to 4 wt. %, based on the total weight of the composition. When this amount is smaller than 0.1 wt. %, the resulting composition is never excellent in frictional properties and abrasion-proofing properties. When it exceeds 5 wt. %, the resulting improvements in such effects are not worth an increase in the amount, while a difficulty is encountered in dissolving the increased amount of the additive(s) in the base oil(s).
  • the phosphorus-containing extreme-pressure additive(s) as the component (C) is generally great in abrasion-proofing effect, and moreover functions as an assistant capable of promoting the effect of the sulfur-containing extreme-pressure additive.
  • the phosphoric ester attains improvements particularly in initial (run-in) frictional properties and abrasion-proofing properties, whereas the phosphorous ester functions in such a way as to secure low frictional properties over a long period of time particularly after the run-in.
  • the alkylamine salt of the phosphoric ester is excellent particularly in abrasion-proofing properties for gears.
  • the lubricating oil composition of the present invention may appropriately be admixed with a variety of common additives for use in the conventional lubricating oils, examples of which additives include a metal-cleaning agent, an ash-free leaning dispersant, a viscosity index improver, a pour point depressant, an antioxidizing agent, a rust inhibitor, a corrosion inhibitor, and an antifoaming agent.
  • additives include a metal-cleaning agent, an ash-free leaning dispersant, a viscosity index improver, a pour point depressant, an antioxidizing agent, a rust inhibitor, a corrosion inhibitor, and an antifoaming agent.
  • Examples of the metal-cleaning agent include calcium sulfonates, magnesium sulfonates, barium sulfonates, calcium phenate, and barium phenate.
  • the amount of the metal-cleaning agent that may be used is usually in the range of 0.1 to 5 wt. %.
  • Examples of the ash-free cleaning dispersant include succinimide compounds, succinamide compounds, benzylamine compounds and boron-containing derivatives thereof, and ester compounds.
  • the amount of the ash-free cleaning agent that may be used is usually in the range of 0.5 to 7 wt. %.
  • viscosity index improver examples include polymethacrylates, polyisobutylene, ethylene-propylene copolymers, and hydrogenated styrene-butadiene copolymers.
  • the amount of the viscosity index improver that may be used is usually in the range of 0.5 to 35 wt. %.
  • the antioxidizing agent examples include amine antioxidizing agents such as alkylated diphenylamines, phenyl- ⁇ -naphthylamine, and alkylated- ⁇ -naphthylamines; and phenolic antioxidizing agents such as 2,6-di-t-butyl-4-methylphenol and 4,4'- methylenebis(2,6-di-t-butylphenol).
  • the amount of the antioxidizing agent that may be used is usually in the range of 0.05 to 2 wt. %.
  • Examples of the rust inhibitor include alkenylsuccinic acids and partial esters thereof.
  • Examples of the corrosion inhibitor include benzotriazole and benzimidazole.
  • Examples of the antifoaming agent include dimethylpolysiloxane and polyacrylates, which may be appropriately added.
  • the friction coefficient (LFW-1), efficiency of torque transmission in a real machine, and seizing-proofing properties (API service classification) of each lubricating oil composition were determined as follows.
  • a tester as shown in Fig. 1 was used together with an S-10 test ring (steel) manufactured by Falex Corporation and an H-60 block (steel) manufactured by Falex Corporation under conditions involving a sliding velocity of 1.4 m/sec, a load of 113 kgf and an oil temperature of 100 °C to carry out the LFW-1 friction test.
  • numeral 1 refers to the S-10 test ring
  • numeral 2 to the H-60 block
  • numeral 3 to a strain meter.
  • the load was applied onto the H-60 block to revolve the ring, whereupon a resistance arose, which was detected with the strain meter to calculate the friction coefficient.
  • the test oil was filled to such an extent that the ring was dipped therein by about half.
  • the test was carried out under conditions involving an input torque of 3 kgf ⁇ m, an input number of revolutions of 1,000 rpm and an oil temperature of 50 °C to determine the efficiency (%) of torque transmission in the real machine.
  • the seizing-proofing properties were determined in accordance with the CRC L-42 test. The higher the value, the better the seizing-proofing properties.
  • Lubricating oil compositions each containing a base oil (a highly refiner mineral oil having a viscosity at 100°C of 11.0 cSt) and various kinds of components as listed in Table 1, the amounts of which are also specified in Table 1, were prepared to determine the friction coefficients (LFW-1), efficiencies of torque transmission in the real machine, and seizing-proofing properties of the compositions. The results are shown in Table 1.
  • graphs in Fig. 2 shows the relationships between the input torque and the efficiency of transmission in the cases of respectively using a lubricating oil according to the present invention and an S-P blend oil.
  • each of the lubricating oil compositions according to the present invention was low in the friction coefficient (LFW-1) and improved in the efficiency of torque transmission in the real machine and the seizing-proofing properties, as compared with the conventional ones comprising S-containing and P-containing additives blended therein.
  • the lubricating oil composition of the present invention for use in a final drive, wherein base oil(s) is blended with a combination of phosphorus-containing extreme-pressure additive(s) and sulfur-containing extreme-pressure additive(s) with MoDTP, improves the efficiency of transmission in a differential gear under various conditions such as the input torque, the input number of revolutions and the temperature of the oil and hence decreases the cost of fuel, as compared with the conventional ones comprising S-containing and p-containing additives blended therein.

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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)
EP94903092A 1992-12-29 1993-12-28 Composition d'huile de lubrification de transmission aux roues motrices. Withdrawn EP0677571A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP4361450A JPH06200270A (ja) 1992-12-29 1992-12-29 終減速機用潤滑油組成物
JP361450/92 1992-12-29
PCT/JP1993/001919 WO1994014933A1 (fr) 1992-12-29 1993-12-28 Composition d'huile de lubrification de transmission aux roues motrices

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Publication Number Publication Date
EP0677571A1 true EP0677571A1 (fr) 1995-10-18
EP0677571A4 EP0677571A4 (fr) 1996-01-24

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EP94903092A Withdrawn EP0677571A4 (fr) 1992-12-29 1993-12-28 Composition d'huile de lubrification de transmission aux roues motrices.

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EP (1) EP0677571A4 (fr)
JP (1) JPH06200270A (fr)
AU (1) AU5717294A (fr)
CA (1) CA2151582A1 (fr)
WO (1) WO1994014933A1 (fr)

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WO1996037585A1 (fr) * 1995-05-26 1996-11-28 The Lubrizol Corporation Lubrifiants comprenant des compositions contenant du molybdene et leurs procedes d'utilisation
EP0822246A3 (fr) * 1996-08-02 1998-04-15 Tonen Corporation Composition d'huile lubrifiante
EP1252277A4 (fr) * 1999-12-22 2004-03-17 Lubrizol Corp Lubrifiant associe a un compose de molybdene, a des composes de phosphore et a des agents dispersants
EP1674556A3 (fr) * 2004-12-21 2007-12-19 Chevron Oronite Company LLC Composition d'additif anti-usure et composition d'huile lubrifiante la contenante
EP3492565A4 (fr) * 2016-07-28 2020-03-25 ExxonMobil Research and Engineering Company Composition d'huile lubrifiante
EP3409751B1 (fr) 2016-01-27 2021-12-15 ExxonMobil Research and Engineering Company Composition lubrifiante

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JPH10316987A (ja) * 1997-05-16 1998-12-02 Cosmo Sogo Kenkyusho:Kk ギヤ油組成物
CN104073320A (zh) * 2009-11-19 2014-10-01 株式会社捷太格特 润滑油、摩擦部件和齿轮式带限滑功能的差速器
JP7055990B2 (ja) * 2017-10-02 2022-04-19 出光興産株式会社 自動車用ギヤ油組成物、及び潤滑方法
JP2020041055A (ja) * 2018-09-11 2020-03-19 Ｅｍｇルブリカンツ合同会社 潤滑油組成物

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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
JPS6361091A (ja) * 1986-09-01 1988-03-17 Showa Shell Sekiyu Kk ギヤ油組成物
DE3712134A1 (de) * 1987-04-10 1988-10-27 Grill Max Gmbh Schmiermittel bzw. schmiermittelkonzentrat
JP2590185B2 (ja) * 1988-03-05 1997-03-12 出光興産株式会社 潤滑油添加剤及びそれを含有する潤滑油組成物
JPH0823034B2 (ja) * 1988-07-09 1996-03-06 本田技研工業株式会社 トリポード式スライド型継手用グリース組成物
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996037585A1 (fr) * 1995-05-26 1996-11-28 The Lubrizol Corporation Lubrifiants comprenant des compositions contenant du molybdene et leurs procedes d'utilisation
EP0822246A3 (fr) * 1996-08-02 1998-04-15 Tonen Corporation Composition d'huile lubrifiante
EP1252277A4 (fr) * 1999-12-22 2004-03-17 Lubrizol Corp Lubrifiant associe a un compose de molybdene, a des composes de phosphore et a des agents dispersants
US6890890B2 (en) 1999-12-22 2005-05-10 The Lubrizol Corporation Lubricants with the combination of a molybdenum compound, a phosphorus compounds and dispersants
EP1674556A3 (fr) * 2004-12-21 2007-12-19 Chevron Oronite Company LLC Composition d'additif anti-usure et composition d'huile lubrifiante la contenante
US7786059B2 (en) 2004-12-21 2010-08-31 Chevron Oronite Company Llc Anti-wear additive composition and lubricating oil composition containing the same
EP3409751B1 (fr) 2016-01-27 2021-12-15 ExxonMobil Research and Engineering Company Composition lubrifiante
EP3492565A4 (fr) * 2016-07-28 2020-03-25 ExxonMobil Research and Engineering Company Composition d'huile lubrifiante

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EP0677571A4 (fr) 1996-01-24
AU5717294A (en) 1994-07-19
CA2151582A1 (fr) 1994-07-07
WO1994014933A1 (fr) 1994-07-07
JPH06200270A (ja) 1994-07-19

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