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
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  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
  • C10M169/04—Mixtures of base-materials and additives
• • 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
  • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
  • C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
  • C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M107/32—Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
  • C10M107/34—Polyoxyalkylenes
• • C—CHEMISTRY; METALLURGY
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
  • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
  • C10M133/38—Heterocyclic nitrogen compounds
  • C10M133/44—Five-membered ring containing nitrogen and carbon only
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  • 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
  • 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
• • 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
  • 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
  • C10M137/08—Ammonium or amine salts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/02—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
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
  • C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
  • C10M2209/1065—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only used as base material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
  • C10M2209/107—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106
  • C10M2209/1075—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106 used as base material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
  • C10M2209/108—Polyethers, i.e. containing di- or higher polyoxyalkylene groups etherified
  • C10M2209/1085—Polyethers, i.e. containing di- or higher polyoxyalkylene groups etherified used as base material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
  • C10M2215/064—Di- and triaryl amines
  • C10M2215/065—Phenyl-Naphthyl amines
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/22—Heterocyclic nitrogen compounds
  • C10M2215/223—Five-membered rings containing nitrogen and carbon only
• • 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
  • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
  • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
  • C10M2219/066—Thiocarbamic type 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
  • 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
  • C10M2223/043—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
• • 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
  • C10N2030/02—Pour-point; Viscosity index
• • 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
  • 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
  • C10N2040/30—Refrigerators lubricants or compressors lubricants

Definitions

• the instant invention relates to oil soluble polyalkylene glycol lubricant compositions.
• hydraulic fluids include those based on mineral oils, polyalphaolefins (PAOs), synthetic esters, phosphate esters, vegetable oils, and polyalkylene glycols (PAGs).
• PAOs polyalphaolefins
• PAGs polyalkylene glycols
• the different types of hydraulic fluids offer varying wear, air release and deposit control properties. Formulated hydraulic fluids which combine all three properties in which the air release and anti-wear values are low but deposit control is excellent are highly desired.
• the instant invention is a lubricant composition and methods of using same in hydraulic fluids, compressor oils and engine oils.
• the instant invention provides a lubricant composition
• a lubricant composition comprising at least 90 wt % of at least one oil soluble polyalkylene glycol (OSP), wherein the OSP comprises at least 40 wt % units derived from butylene oxide and at least 40 wt % units derived from propylene oxide, initiated by one or more initiators selected from monols, diols, and polyols; and at least 0.05 wt % of at least one anti-wear additive; wherein the lubricant composition exhibits a four ball anti-wear of less than or equal to 0.35 mm and an air release value at 50° C. of less than or equal to 1 minute.
• OSP oil soluble polyalkylene glycol
• the instant invention is a lubricant composition.
• the composition according to the instant invention comprises at least 90 wt % of at least one oil soluble polyalkylene glycol (OSP), wherein the OSP comprises at least 40 wt % units derived from butylene oxide and at least 40 wt % units derived from propylene oxide (PO), initiated by one or more initiators selected from monols, diols, and polyols; and at least 0.05 wt % of at least one anti-wear additive; wherein the lubricant composition exhibits a four ball anti-wear of less than or equal to 0.35 mm and an air release value at 50° C. of less than or equal to 1 minute.
• OSP oil soluble polyalkylene glycol
• PO propylene oxide
• Oil soluble polyalkylene glycols (OSPs) useful in embodiments of the lubricant composition comprise at least 40 weight percent units derived from butylene oxide. All individual values and subranges from at least 40 weight percent units derived from butylene oxide are included herein and disclosed herein; for example, the amount of units derived from butylene oxide can be from a lower limit of 40, 45, 50, 55 or 60 weight percent. Oil soluble polyalkylene glycols useful in embodiments of the lubricant composition comprise at least 40 weight percent units derived from propylene oxide.
• All individual values and subranges from at least 40 weight percent units derived from propylene oxide are included herein and disclosed herein; for example, the amount of units derived from propylene oxide can be from a lower limit of 40, 45, 50, 55 or 60 weight percent.
• the lubricant composition comprises at least 90 weight percent (wt %) of such oil soluble PAG. All individual values and subranges from at least 90 weight percent oil soluble PAG are included herein and disclosed herein; for example, the amount of oil soluble PAG in the lubricant composition can be from a lower limit of 90, 92, 94, 95, 96, 98 or 100 weight percent.
• OSPs useful in embodiments of the lubricant composition are initiated by one or more initiators selected from group consisting of alcohols (i.e., monols), diols, and polyols.
• exemplary alcohol (i.e., monol) initiators include methanol, ethanol, propanol, butanol, pentanol, hexanol, neopentanol, isobutanol, decanol, 2-ethylhexanol, and the like, as well as higher acyclic alcohols derived from both natural and petrochemical sources with from 11 carbon atoms to 22 carbon atoms alcohols
• Exemplary diol initiators include monoethylene glycol, monopropylene glycol, butylene glycol, diethylene glycol or dipropylene glycol.
• Exemplary polyol initiators include neopentyl glycol, trimethyolpropane and pentaerythritiol.
• Embodiments of the lubricant compositions comprise at least 0.05 wt % of at least one anti-wear additive. All individual values and subranges from at least 0.05 weight percent anti-wear additive are included herein and disclosed herein; for example, the amount of anti-wear additive in the lubricant composition can be from a lower limit of 0.05, 0.15, 0.25, 0.5, 0.8 or 1 weight percent
• Embodiments of the lubricant composition exhibit a four ball anti-wear of less than or equal to 0.35 mm. All individual values and subranges from less than or equal to 0.35 mm are included herein and disclosed herein; for example, the lubricant composition can exhibit a four ball anti-wear of less than or equal to 0.35, 0.34, 0.33, 0.32, 0.31, 0.30, or 0.29 mm.
• Embodiments of the lubricant composition exhibit an air release value at 50° C. of less than or equal to 1 minute. All individual values and subranges from less than or equal to 1 minute are included herein and disclosed herein; for example, the lubricant composition can exhibit an air release value at 50° C. of less than or equal to 15 seconds, 30 seconds, 45 seconds, or 1 minute.
• the lubricant composition further exhibit an air release value at 75° C. of less than or equal to 1 minute. All individual values and subranges from less than or equal to 1 minute are included herein and disclosed herein; for example, the lubricant composition can exhibit an air release value at 75° C. of less than or equal to 15 seconds, 30 seconds, 45 seconds, or 1 minute.
• the at least one OSP exhibits an aniline point of less than ⁇ 20° C. All individual values and subranges from less than ⁇ 20° C. are included herein and disclosed herein; for example, the aniline point of the at least one OSP can be from an upper limit of ⁇ 30, ⁇ 28, ⁇ 24, or ⁇ 20° C.
• the at least one OSP exhibits a kinematic viscosity at 40° C. from 15 to 250 cSt. All individual values and subranges from 15 to 250 cSt are included herein and disclosed herein; for example, the kinematic viscosity at 40° C. of the at least one OSP can be from a lower limit of 15, 20, 50, 80, 110, 130, 170, 210, or 240 cSt to an upper limit of 30, 60, 90, 120, 150, 180, 220 or 250 cSt. For example, the kinematic viscosity may be in the range of from 15 to 250 cSt, or from 15 to 220 cSt, or from 100 to 180 cSt.
• Anti-wear additives useful in the lubricant composition include, for example, one or more additives selected from the group consisting of zinc dialkyldithiophosphates, amine phosphates, dithiocarbamates, alkylphosphate esters, ashless dithiocarbamates, combinations thereof and blends thereof.
• the lubricant composition may further comprise one or more additives selected from the group consisting of extreme pressure additives, yellow metal passivators, and anti-oxidants.
• extreme pressure additives include ashless dithiophosphates, triaryl phosphothionates, alkyl diphenylphosphites, amine phosphates, dithiophosphates and triaryl phosphothionates.
• yellow metal passivators include tolyltriazole, benzotriazole and N-alkylated toyltriazole.
• antioxidants include octylated diphenylamine, alkylated phenyl alpha napthylamine, octylated/butylated diphenylamine and phenolic types antioxidant.
• the lubricant composition may be used as a hydraulic fluid, compressor oil or engine oil.
• polar base oils such as PAG based oils
• the polarity of a base oil is generally related to its aniline point.
• Polar base oils generally have low aniline points ( ⁇ 50° C.).
• Aniline points for API (American Petroleum Institute) Group I-IV hydrocarbon base oils are typically greater than or equal to 100° C.
• the aniline point generally increases from Group I to II to III and IV base oils, as is shown in Table 1.
• the instant invention provides a lubricant composition, hydraulic fluid, compressor oil or engine oil, in accordance with any of the preceding embodiments, each of the at least one OSP exhibits an aniline point of less than ⁇ 20° C.
• the instant invention provides a lubricant composition, hydraulic fluid, compressor oil or engine oil, in accordance with any of the preceding embodiments, except that each of the at least one OSPs has a kinematic viscosity at 40° C. between 15 and 250 cSt.
• the instant invention provides a lubricant composition, hydraulic fluid, compressor oil or engine oil, in accordance with any of the preceding embodiments, each of the at least one anti-wear additives is present in an amount from 0.1 to 0.25 wt %.
• the instant invention provides a lubricant composition, hydraulic fluid, compressor oil or engine oil, in accordance with any of the preceding embodiments, the anti-wear additives are selected from the group consisting of zinc dialkyldithiophosphates, amine phosphates, dithiocarbamates, alkylphosphate esters, ashless dithiocarbamates, combinations thereof and blends thereof.
• the instant invention provides a lubricant composition, hydraulic fluid, compressor oil or engine oil, in accordance with any of the preceding embodiments, each of the at least one OSP exhibits an aniline point of less than ⁇ 25° C.
• the instant invention provides a lubricant composition, hydraulic fluid, compressor oil or engine oil, in accordance with any of the preceding embodiments, the lubricant composition further comprises one or more additives selected from the group consisting of extreme pressure additives, yellow metal passivators, and anti-oxidants.
• the instant invention provides a lubricant composition, hydraulic fluid, compressor oil or engine oil, in accordance with any of the preceding embodiments, the lubricant composition further exhibits an air release value at 75° C. of less than or equal to 1 minute.
• the instant invention provides a lubricant composition, hydraulic fluid, compressor oil or engine oil, in accordance with any of the preceding embodiments, the lubricant composition exhibits a four ball anti-wear value of less than or equal to 0.32 mm.
• the lubricant composition consists essentially of an oil soluble polyalkylene glycol (OSP), wherein the OSP comprises from 40 to 60 wt % units derived from butylene oxide and from 40 to 60 wt % units derived from propylene oxide, initiated by one or more initiators selected from alcohols and diols; and at least 0.05 wt % of at least one anti-wear additive; wherein the lubricant composition exhibits a four ball anti-wear value of less than or equal to 0.35 mm and an air release value at 50° C. of less than or equal to 1 minute.
• OSP oil soluble polyalkylene glycol
• the invention further provides a gear lubricant composition
• a gear lubricant composition comprising at least 95 wt % of at least one oil soluble polyalkylene glycol (OSP), wherein the OSP is a polymer selected from the group consisting of copolymers comprising units derived from propylene oxide and butylene oxide, polybutylene oxide homopolymer, and combinations thereof and wherein the OSP exhibits a kinematic viscosity at 40° C. of greater than or equal to 100 cSt; and from 0.25 to 2 wt % of at least one extreme pressure additive; wherein the lubricant composition exhibits a four ball EP weld load of at least 160 kg and an air release value at 75° C. of less than or equal to 3 minutes.
• OSP oil soluble polyalkylene glycol
• the OSP of the gear lubricant composition is a polymer selected from the group consisting of copolymers comprising units derived from propylene oxide and butylene oxide, polybutylene oxide homopolymer, and combinations thereof.
• the OSP comprises from 30 to 70 percent by weight units derived from propylene oxide and from 70 to 30 percent by weight units derived from butylene oxide. All individual values and subranges from 30 to 70 percent by weight units derived from propylene oxide are included herein and disclosed herein; for example, the amount of units derived from propylene oxide may range from a lower limit of 30, 40, 50, or 60 percent by weight to an upper limit of 35, 45, 55, 65, or 70 percent by weight.
• the amount of units derived from propylene oxide may range from 30 to 70 percent by weight, or in the alternative, the amount of units derived from propylene oxide may range from 40 to 60 percent by weight, or in the alternative, the amount of units derived from propylene oxide may range from 40 to 70 percent by weight, or in the alternative, the amount of units derived from propylene oxide may range from 45 to 55 percent by weight, or in the alternative, the amount of units derived from propylene oxide may be 50 percent by weight.
• the amount of units derived from butylene oxide may range from 30 to 70 percent by weight, or in the alternative, the amount of units derived from butylene oxide may range from 40 to 60 percent by weight, or in the alternative, the amount of units derived from butylene oxide may range from 30 to 60 percent by weight, or in the alternative, the amount of units derived from butylene oxide may range from 45 to 55 percent by weight, or in the alternative, the amount of units derived from butylene oxide may be 50 percent by weight.
• the OSP of the gear lubricant composition exhibits a kinematic viscosity at 40° C. of greater than or equal to 100 cSt. All individual values and subranges are included herein and disclosed herein; for example, the kinematic viscosity at 40° C. can be from a lower limit of 100, 200, 300, 400, 500, or 600 cSt.
• the gear lubricant composition comprises from 0.25 to 2 wt % of at least one extreme pressure additive. All values and subranges from 0.25 to 2 percent by weight are included herein and disclosed herein; for example, the amount of extreme pressure additive can range from a lower limit of 0.25, 0.5, 0.75, 1, 1.25, 1.5, or 1.75 percent by weight to an upper limit of 0.5, 0.75, 1, 1.25, 1.5, 1.75, or 2 percent by weight.
• the amount of one or more extreme pressure additives may be from 0.25 to 2 percent by weight, or in the alternative, the amount of one or more extreme pressure additives may be from 0.25 to 1 percent by weight, or in the alternative, the amount of one or more extreme pressure additives may be from 1 to 2 percent by weight, or in the alternative, the amount of one or more extreme pressure additives may be from 0.75 to 1.75 percent by weight, or in the alternative, the amount of one or more extreme pressure additives may be from 0.5 to 1 percent by weight.
• the gear lubricant composition exhibits a four ball EP weld load of at least 160 kg. All individual values and subranges of at least 160 kg are included herein and disclosed herein; for example, the four ball EP weld load may be from a lower limit of 160, 170, 180, 190 or 200 kg.
• the gear lubricant composition exhibits an air release value at 75° C. of less than 3 minutes. All individual values and subranges of less than 3 minutes are included herein and disclosed herein; for example, the air release value at 75° C. may be from an upper limit of 3, 2.5, 2, 1.5 or 1 minutes.
• gear lubricant composition While the foregoing discussion refers to a gear lubricant composition, it is not intended to limit the use of such composition to solely geared mechanisms. Rather, the gear lubricant composition is particularly suited to certain applications due to its excellent air release and extreme pressure properties. However, the gear lubricant composition may be used in any situation in which its properties would be useful or beneficial.
• Table 2 provides a listing of base oils, anti-wear additives, antioxidants, extreme pressure additives and yellow metal passivators, their compositions, properties and commercial suppliers, used in the inventive and comparative examples.
• PAG-A The Dow Chemical Alcohol initiated random copolymer (PO/BO) OSP-32 Company with a typical kinematic viscosity at 40° C. of 32 mm 2 /s (cSt) and an average molecular weight of 760 g/mole.
• PAG-B The Dow Chemical Alcohol initiated random copolymer (PO/BO) OSP-46 Company with a typical kinematic viscosity at 40° C. of 46 mm 2 /s (cSt) and an average molecular weight of 1000 g/mole.
• PAG-C The Dow Chemical Alcohol initiated random copolymer (PO/BO) OSP-68 Company with a typical kinematic viscosity at 40° C. of 68 mm 2 /s (cSt) and an average molecular weight of 1400 g/mole.
• PAG-D The Dow Chemical Alcohol initiated random copolymer (PO/BO) OSP-220 Company with a typical kinematic viscosity at 40° C. of 220 mm 2 /s (cSt) and an average molecular weight of 2400 g/mole.
• UCON OSP-460 The Dow Chemical Butylene oxide homopolymer with a typical Company kinematic viscosity at 40° C.
• compositions of Inventive Examples 1-6 are shown in Tables 3-7.
• Comparative Examples 1-5 were 100 wt % (with no additives) of each of PAG-A, PAG-B, PAG-C, PAG-D, and UCON 50-HB-260, respectively.
• Comparative Example 6 was 99.75 wt % UCON 50-HB-260 plus 0.25 wt % NALUBE AW6110.
• Comparative Example 7 was a formulated commercial oil, available under the name QUINTOLUBRIC 888-46, which is a synthetic polyol ester-based hydraulic fluid available from Quaker Chemical Corporation.
• Comparative Example 8 was a formulated commercial oil, available under the name QUINTOLUBRIC 855, which is a natural ester (rapeseed oil)-based hydraulic fluid, available from Quaker Chemical Corporation.
• Comparative Example 9 was a formulated commercial oil, available under the name QUINTOLUBRIC 703, which is a fire resistant water glycol-based hydraulic fluid, available from Quaker Chemical Corporation.
• Comparative Example 10 was a formulated commercial oil, available under the name HYSPIN AWH-M32, which is a mineral oil-based hydraulic fluid, available from Castrol Ltd.
• Comparative Example 11 was a formulated commercial oil, available under the name HYSPIN AWH-M46, which is a mineral oil-based hydraulic fluid, available from Castrol Ltd.
• Comparative Example 12 was a formulated commercial oil, available under the name HYSPIN AWH-M68, which is a mineral oil-based hydraulic fluid, available from Castrol Ltd.
• Comparative Example 13 was a formulated commercial oil, available under the name HYSPIN AWH-M100, which is a mineral oil-based hydraulic fluid, available from Castrol Ltd.
• Comparative Example 14 was a formulated commercial oil, available under the name HYSPIN AWH-M150, which is a mineral oil-based hydraulic fluid, available from Castrol Ltd.
• Comparative Example 15 was a formulated biodegradable commercial oil, available under the name 112B-32, which is a high oleic vegetable oil and synthetic ester-based hydraulic fluid, available from Schaeffer Manufacturing Co. (St. Louis, Mo., USA).
• Comparative Example 16 was a formulated biodegradable commercial oil, available under the name 112B-46, which is a high oleic vegetable oil and synthetic ester-based hydraulic fluid, available from Schaeffer Manufacturing Co. (St. Louis, Mo., USA).
• Comparative Example 17 was a formulated biodegradable commercial oil, available under the name 112B-68, which is a high oleic vegetable oil and synthetic ester-based hydraulic fluid, available from Schaeffer Manufacturing Co. (St. Louis, Mo., USA).
• Comparative Example 18 was a formulated synthetic commercial oil, available under the name NATURELLE HF-E32, which is a synthetic ester-based hydraulic fluid, available from Shell Oil Company.
• Comparative Example 19 was a formulated synthetic commercial oil, available under the name NATURELLE HF-E46, which is a synthetic ester-based hydraulic fluid, available from Shell Oil Company.
• Comparative Example 20 was a formulated biodegradable commercial oil, available under the name CAT BIO HYDO, which is a synthetic ester-based hydraulic fluid, available from Caterpillar Corporation
• Comparative Example 21 was a formulated biodegradable commercial oil, available under the name BIO-46 HYD, which is an ester-based hydraulic fluid, available from Renewable Lubricants, Inc. (Hartville, Ohio, USA).
• Comparative Example 22 was a formulated biodegradable commercial oil, available under the name SYMBIO Bio-hydraulic Fluid, which is a high oleic vegetable oil and PAG (based on a butanol initiated propoxylate)-based hydraulic fluid containing 0.5 wt % amine phosphate and 1 wt % antioxidant package, from The Dow Chemical Company.
• SYMBIO Bio-hydraulic Fluid is a high oleic vegetable oil and PAG (based on a butanol initiated propoxylate)-based hydraulic fluid containing 0.5 wt % amine phosphate and 1 wt % antioxidant package, from The Dow Chemical Company.
• Comparative Example 23 was a synthetic PAG hydraulic fluid, an EO/PO random copolymer with 0.25 wt % amine phosphate anti-wear additive, available under the name UCON TRIDENT AW-46, from The Dow Chemical Company.
• Comparative Example 24 was a fire resistant hydraulic fluid, available under the name ECOSAFE FR-46, a PAG based on a butanol initiated propoxylate, from American Chemical Technologies, Inc. (Fowlerville, Mich., USA).
• Comparative Example 25 was a Group II mineral oil-based hydraulic fluid (ISO 46), obtained from King Industries, Inc. (Norwalk, Conn., USA).
• ISO 46 Group II mineral oil-based hydraulic fluid
• Comparative Example 26 was a Group II mineral oil-based (ISO 46) hydraulic fluid formulated with 0.1 wt % NALUBE AW-6110, obtained from King Industries, Inc. (Norwalk, Conn., USA).
• ISO 46 Group II mineral oil-based hydraulic fluid formulated with 0.1 wt % NALUBE AW-6110, obtained from King Industries, Inc. (Norwalk, Conn., USA).
• Inventive Examples 7-14 and Comparative Example 27-28 illustrate the effect of certain OSPs as base oils to yield lubricant compositions having improved extreme pressure and air release properties.
• Table 9 provides the composition and properties of Comparative Examples 27-28 and Inventive Examples 7-9.
• Table 10 provides the composition and properties of Inventive Examples 10-14.
• Test methods include the following:
• Viscosity index was measured in accordance with ASTM 2272.
• Air release was measured in accordance with ASTM D3427. For hydraulic fluids which are typically low viscosity fluids and in the range 22 to 150 cSt at 40° C., air release measurements were made at 50° C. For higher viscosity fluids, (i.e., Inv. Ex. 6) measurements were made at higher temperatures such as 75° C.
• Extreme pressure welding load was measured using ASTM D2783 at a temperature of 18-36 oC, speed 1760+/ ⁇ 40 rpm, duration 10 seconds with increasing load.

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• 2012
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