Classifications

• • 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
  • 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
• • 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
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/087—Boron oxides, acids or salts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
  • C10M2219/022—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of hydrocarbons, e.g. olefines
• • 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
  • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
  • C10M2219/024—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of esters, e.g. fats
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
  • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
  • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
  • C10M2219/083—Dibenzyl sulfide
• • 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
  • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
  • C10N2020/09—Characteristics associated with water
  • C10N2020/095—Crystal water containing compounds
• • 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
  • 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
  • C10N2070/00—Specific manufacturing methods for lubricant compositions
  • C10N2070/02—Concentrating of additives

Definitions

• the present invention relates to a novel lubricating oil composition having improved extreme pressure and antiwear properties.
• the novel lubricating oil composition comprises an alkali metal borate, an oil-soluble sulfur-containing compound, and a trialkyl phosphite.
• the unique combination of compounds provides improved load-carrying performance, especially at high temperatures, in gears.
• the present invention relates to extreme pressure lubricating oils that meet the newer, more stringent load-carrying capacity requirements of OEMs.
• U.S. Patent Number 4,459,215 discloses a lubricating composition containing an alkali metal borate, a sulfur-containing compound and a zirconium salt.
• U.S. Patent Number 4,575,431 discloses a lubricating oil containing a mixture of phosphates said phosphates being essentially free of monothiophosphates.
• U.S. Patent Number 4,089,790 discloses a synergistic lubricant mixture containing: (1) a hydrated potassium borate; (2) an antiwear agent selected from (a) zinc dihydrocarbyl dithiophosphate, (b) C 1 -C 20 ester, C 1 to C 20 amide or C 1 to C 20 amine salt of a dihydrocarbyl dithiophosphoric acid, (c) zinc alkyl aryl sulfonate, and (d) mixture thereof; and (3) oil soluble antioxidant organic sulfur compound.
• an antiwear agent selected from (a) zinc dihydrocarbyl dithiophosphate, (b) C 1 -C 20 ester, C 1 to C 20 amide or C 1 to C 20 amine salt of a dihydrocarbyl dithiophosphoric acid, (c) zinc alkyl aryl sulfonate, and (d) mixture thereof; and (3) oil soluble antioxidant organic sulfur compound.
• U.S. Patent Number 4,171,268 discloses lubricant compositions containing a zirconium salt of a carboxylic acid and oil-soluble sulfur-containing extreme pressure agent.
• a lubricating oil containing an alkali metal borate, an oil-soluble sulfur-containing compound, and a trialkyl phosphite provides surprisingly improved load-carrying capacity, especially at high temperatures, thus reducing wear on the gears commonly found, for example, in transmissions, axles, trans-axles and industrial machinery, such as stationary gear boxes.
• the present invention also relates to a lubricating oil additive composition
• a lubricating oil additive composition comprising a mixture of:
• a minor but effective amount of the concentrate of the present invention may be incorporated into a major amount of lubricating oil to improve the high temperature load-carrying performance by the lubricating oil composition.
• gears generally refers to a toothed wheel, cylinder, or other machine element that meshes with another toothed element to transmit motion or to change speed or direction.
• gears are, but are not limited to, spur, bevel, hypoid, spiral bevel, worm, helical, and herringbone.
• hydrocarbyl refers to an organic radical primarily composed of carbon and hydrogen which may be aliphatic, alicyclic, aromatic or combinations thereof, e.g., aralkyl or alkaryl. Such hydrocarbyl groups are generally free of aliphatic unsaturation, i.e., olefinic or acetylenic unsaturation, but may contain minor amounts of heteroatoms, such as oxygen or nitrogen, or halogens, such as chlorine.
• base oil of lubricating viscosity generally refers to an oil having a viscosity of 3 to 45 cSt at 100°C in the case of lubricating oil compositions and may be a single oil or a blend of oils.
• Hydrated alkali metal borates are well known in the art and are available commercially. Representative patents disclosing suitable borates and methods of manufacture include: U.S. Pat. Nos. 3,313,727; 3,819,521; 3,853,772; 3,907,601; 3,997,454; and 4,089,790, the entire disclosures of which are incorporated herein by reference.
• organic sulfur compounds which have heretofore been suggested as being useful as extreme pressure (EP) agents may be used as a sulfur-containing agent in the present invention.
• EP extreme pressure
• These sulfur compounds may contain other groups which are beneficial and these include halogen groups.
• organic sulfides and polysulfides which are useful as EP agents include aliphatic and aromatic sulfides and polysulfides such as hexyl sulfide, octadecyl sulfide, butyl disulfide, amyl disulfide, hexyl disulfide, octadecyl disulfide, diphenyl sulfide, dibenzyl sulfide, dixylyl sulfide, diphenyl disulfide, dinaphthyl disulfide, diphenol disulfide, dibenzyl disulfide, bis(chlorobenzyl) disulfide, dibenzyl trisulfide, dibutyl tetrasulfide, sulfurized dipentene and sulfurized terpene.
• aliphatic and aromatic sulfides and polysulfides such as hexyl sulfide,
• a preferred class of sulfur-containing additives are those made by reacting sulfur and/or sulfur monochloride with an olefin such as isobutylene. Particularly preferred are the sulfurized olefins disclosed in U.S. Pat. Nos. 4,563,302 and 4,204,969, the entire disclosures of which are incorporated herein by reference.
• Halogenated derivatives of the above sulfides and polysulfides are useful and examples include the chlorinated and fluorinated derivatives of diethyl sulfide and disulfide, dioctyl sulfide and disulfide, diamyl sulfide and disulfide, diphenyl sulfide and disulfide, and dibenzyl sulfide and disulfide.
• sulfur and halogen EP agents which may be used is found in U.S. Pat. No. 2,208,163.
• sulfurized oils include sulfurized sperm oil, sulfurized methyl ester of oleic acid, and sulfurized sperm oil replacements.
• Other examples of sulfurized oils include sulfurized methyl linoleate, sulfurized animal and vegetable oils, sulfurized lard oil, and sulfurized cottonseed oil.
• Trialkyl phosphites useful in the present invention include (RO) 3 P where R is a hydrocarbyl of 4 to 24 carbon atoms, more preferably 8 to 18 carbon atoms, and most preferably 10 to 14 carbon atoms.
• the hydrocarbyl may be saturated or unsaturated.
• Representative trialkyl phosphites include, but are not limited to, tributyl phosphite, trihexyl phosphite, trioctyl phosphite, tridecyl phosphite, trilauryl phosphite and trioleyl phosphite.
• a particularly preferred trialkyl phosphite is trilauryl phosphite, such as commercially available Duraphos TLP® by Albright and Wilson, Inc.
• Preferred are mixtures of phosphites containing hydrocarbyl groups having 10 to 14 carbon atoms. These mixtures are usually derived from animal or natural vegetable sources. Representative hydrocarbyl mixtures are commonly known as coco, tallow, tall oil, and soya.
• the base oil of lubricating viscosity used in such compositions may be mineral oils or synthetic oils of viscosity suitable for use in gears.
• the base oils may be derived from synthetic or natural sources.
• Mineral oils for use as the base oil in this invention include, for example, paraffinic, naphthenic and other oils that are ordinarily used in lubricating oil compositions.
• Synthetic oils include, for example, both hydrocarbon synthetic oils and synthetic esters and mixtures thereof having desired viscosity.
• Useful synthetic hydrocarbon oils include liquid polymers of alpha olefins having the proper viscosity. Especially useful are the hydrogenated liquid oligomers of C 6 to C 12 alpha olefins such as 1-decene trimer.
• the lubricating oil composition of the present invention is useful for imparting improved load-carrying capacity, especially at high temperatures of gears such as commonly found, for example, in transmissions, axles, trans-axles and industrial machinery, such as stationary gear boxes.
• Such a lubricating oil composition comprises a base oil of lubricating viscosity and an effective amount of the above compounds.
• the alkali-metal borate will generally comprise 0.5 to 6.0 wt % of the lubricating oil composition, more preferably 2.0 to 5.0 wt %, and most preferably 3.5 to 4.5 wt %.
• the oil-soluble sulfur compounds will comprise 0.5 to 5.0 wt % of the lubricating oil composition, preferably 2.0 to 4.0 wt %, and more preferably 2.5 to 3.5 wt %.
• the phosphites will comprise 0.5 to 6.0 wt % of the lubricating oil composition, preferably 2.0 to 5.0 wt %, and more preferably 3.0 to 4.5 wt %.
• the lubricating oil composition of the present invention can be made by addition of the additive composition to a lubricating base oil, as will be described in the following section.
• the lubricating oil composition of the present invention is useful in a method of improving the high temperature load-carrying performance of gears.
• an lubricating oil composition is used to lubricate gears.
• the lubricating oil composition of the invention can be prepared by successively or simultaneously adding the additive components to a base oil, or by beforehand preparing an additive composition or as a concentrate, as herein described below, and then mixing it with a base oil.
• Lubricating oil additive compositions within the scope of the present invention comprise
• the lubricating oil composition described in the previous section can be made by the addition of the lubricating oil additive composition to a base oil.
• the lubricant will contain 1.0 to 15.0 wt %, more preferably 5.0 to 14.0 wt %, and most preferably 10.0 to 14.0 wt % of the lubricating oil additive composition.
• the additive concentrate of the present invention usually include the product produced by blending:
• the concentrates contain sufficient organic liquid diluent to make them easy to handle during shipping and storage.
• the concentrate will contain from 1.0 to 15 wt % of the organic liquid diluent, preferably 2.0 to 10 wt %.
• additive components are examples of some of the components that can be favorably employed in the present invention. These examples of additives are provided to illustrate the present invention, but they are not intended to limit it:
• Blend Number C contains an alkali metal borate, a sulfur-containing compound, and a dialkyl phosphite.
• Blend Number D is similar to Blend Number C except the concentration of the dialkyl phosphite is 4 wt %. Results from the Eaton High Temperature L37 Test are shown in Table II.
• Blend Number Component C D Wt % Component Alkali Metal Borate 3 4 Sulfur-Containing Compound 2 3 Dialkyl Phosphite 0.3 4 Results Fail Pass Compatibility Yes No

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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)

Applications Claiming Priority (2)

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• 2001
  • 2001-04-10 EP EP01303359A patent/EP1167496A2/en not_active Withdrawn
  • 2001-04-10 CA CA002343641A patent/CA2343641A1/en not_active Abandoned
  • 2001-04-12 SG SG200102112A patent/SG108247A1/en unknown
  • 2001-04-13 JP JP2001115705A patent/JP2001348592A/ja not_active Withdrawn

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