EP1828357A2 - Combinaisons d'additifs de lubrifiant permettant d'ameliorer la capacite de charge et la duree de vie en fatigue des surfaces - Google Patents

Combinaisons d'additifs de lubrifiant permettant d'ameliorer la capacite de charge et la duree de vie en fatigue des surfaces

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Publication number
EP1828357A2
EP1828357A2 EP05858293A EP05858293A EP1828357A2 EP 1828357 A2 EP1828357 A2 EP 1828357A2 EP 05858293 A EP05858293 A EP 05858293A EP 05858293 A EP05858293 A EP 05858293A EP 1828357 A2 EP1828357 A2 EP 1828357A2
Authority
EP
European Patent Office
Prior art keywords
lubricant
alkyl
aryl
integer
amount
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.)
Withdrawn
Application number
EP05858293A
Other languages
German (de)
English (en)
Inventor
Hongmei Wen
Clark V. Cooper
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.)
RTX Corp
Original Assignee
United Technologies 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
Application filed by United Technologies Corp filed Critical United Technologies Corp
Publication of EP1828357A2 publication Critical patent/EP1828357A2/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • C10M129/68—Esters
    • C10M129/76—Esters containing free hydroxy or carboxyl 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
    • 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
    • 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
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/287—Partial esters
    • C10M2207/289—Partial esters containing free hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—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
    • 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
    • C10M2219/068—Thiocarbamate metal salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • 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
    • C10M2223/045—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
    • 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
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/02—Bearings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/12—Gas-turbines
    • C10N2040/13—Aircraft turbines
    • 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

Definitions

  • the present invention relates to a multifunctional lubricant additive composition or package for improving the performance characteristics of a lubricant. More particularly, the present invention relates to a multifunctional lubricant additive composition or package for providing a lubricant with superior performance characteristics such as improved load- carrying ability, anti-scuffing (anti-scoring) capacity, friction reduction, and improved surface-fatigue life.
  • Mechanical systems such as manual or automatic transmissions; single and multi-speed aviation transmissions, including but not limited to those used to propel rotorcraft and those used to alter the rotational speed of sections within gas turbine engines; push-belt type continuous variable transmissions; and traction drive continuous variable transmissions, have large surface areas of contact zones. These contact portions or zones, such as drive rolling surfaces, and gear and ball-and roller bearings, are known to be susceptible to high surface pressures.
  • internal combustion engines and other propulsion devices especially those that are common for high-performance and racing applications, are subject to taxing demands in the form of inertial loading, high sliding and/or rolling speeds, and marginal lubrication.
  • the need for reducing friction resistance and fatigue within larger contact zones of mechanical systems is increased by many recently developed transmission systems that are designed to be miniaturized or weight-reduced to maximize transmission throughput capacity.
  • lubricants especially those containing specific additives, play a critical role in protecting and minimizing the wear and scuffing (scoring) of surfaces.
  • the lubricants generally reduce principal damage accumulation mechanisms of lubricated components caused by surface fatigue and overloading.
  • the present invention provides lubricant additives for improving the performance characteristics (i.e, load-carrying capacity and/or surface fatigue life, etc.) of mechanical systems.
  • the present invention provides lubricant additives comprising elements or components that are intended to enhance the performance characteristics, such as scuffing (scoring) resitance and surface-fatigue life of a lubricant base stock or fully formulated lubricant including anti-wear (AW), extreme pressure (EP), and friction modifying (FM) compositions.
  • scuffing Scoring
  • EP extreme pressure
  • FM friction modifying
  • this invention provides a multifunctional lubricant additive composition for improving the performance characteristics of a natural or synthetic lubricant for use in transmission fluid products that meet both civil and military specifications.
  • the present invention provides a multifunctional composition for use in improving the performance of metals and alloys of power transmission components, including but not limited to gears, bearings, splines, shafts and springs.
  • this invention provides a multifunctional lubricant additive composition for improving the performance characteristics of engines and related propulsive devices used to power automobiles, both stock (production) and specialty (e.g. racing and other high performance) varieties, and heavy on- and off-road equipment, such as farm implements and construction equipment.
  • the present invention provides a multifunctional lubricant additive composition capable of being combined with lubricant stocks and other additives to produce a fully formulated lubricant that beneficially reduces friction and scuffing (scoring), and improves resistance to surface damage and surface degradation through fatigue, including micro- and macro-pitting, and wear.
  • the present invention provides a multifunctional lubricant additive composition, for improving the performance characteristics of a lubricant, which includes one or more of the following components:
  • R 1 , R 2 , and R 3 are each C n H 2n +i alkyl groups of an alkyl neutral phosphate or (C 6 H 5 Cm!- ⁇ +-!) aryl groups of an aryl neutral phosphate, n is an integer of about 2 ⁇ n ⁇ 10, m is an integer of about 0 ⁇ m ⁇ 8; partial ester having the general formula:
  • R* -C C • R 3 -C O CH 7 -CH -CHo -OH
  • R 4 and R 5 are each Cjhbi+i alkyl groups and i is an integer of about 7 ⁇ i ⁇ 15;
  • R 6 , R 7 , R 8 , R 9 , R 10 , and R 11 are each C j H 2j+ i alkyl groups preferably having tertiary structures, wherein j is an integer of about 1 ⁇ j ⁇ 20;
  • R 12 , R 12' , R 12 " , and R 12 " are each C p H 2 p+i alkyl groups, and p is an integer of about 1 ⁇ p ⁇ 12; wherein R 13 , R 13' , R 13 " , and R 13 ' are each a phenol group represented by the formula:
  • THS ptfesehfinVfetiffcn also provides a method for improving the performance characteristics (i.e, load-carrying capacity and/or surface fatigue life, etc.) of a lubricant.
  • the method includes mixing a lubricant with one of the above-described multifunctional lubricant additive compositions.
  • the figure shows the relationship between the average traction (friction) coefficient and average failure load stage for various lubricants.
  • the vertical arrows 11 , 21 , 31 , 41 indicate the average scuffing (scoring) failure load stage (load-carrying capacity) of the Hatco HXL-7944 oil, Formulation #1 , Exxon-Mobil Jet Oil II, and Formulation #2, respectively.
  • "Load stage” in this context is a numerical value that is proportional to the force applied between the rotating ball and the rotating disc. A higher scuffing (scoring) failure load stage indicates greater load-carrying capacity of the lubricant.
  • results of a polished surface with standard lubricant are indicated by line 5; the results of the Hatco HXL-7994 oil are indicated by line 10; the results of Formulation #1 of this invention are indicated by line 20; the results of Exxon-Mobil Jet Oil Il are indicated by line 30; and the results of Formulation #2 of this invention are indicated by line 40.
  • the present invention provides a multifunctional lubricant composition for improving the performance characteristics of a lubricant, especially the lubricant's ability to enhance surface fatigue life and/or load- carrying capacity (i.e, scuffing or scoring performance) of mechanical components.
  • the composition includes one or more of the following additive components (or, in some embodiments, each of the following components): (a) an antiwear additive (AW) such as an aryl or alkyl neutral phosphate represented by the general formula (I); (b) a friction modifier (FM) such as an aryl or alkyl neutral phosphate as represented by the general formula (II); an extreme pressure additive (EP) of the mixture of (c) h ⁇ afyrbrarkyi pfi ⁇ s ⁇ rhfe Is represented by the general formula (III) and (d) a phenol compound as represented by general formula (IV).
  • the total amount of additives (a) - (d) is preferably about 10% by mole or less based on the total amount of lubricant.
  • the composition includes the following:
  • R 1 , R 2 , and R 3 are each independently C n H 2 n+i alkyl groups of an alkyl neutral phoshate or (C6H 5 CmH2m+i) ar Y' groups of an aryl neutral phosphate, n is an integer of about 2 ⁇ n ⁇ 10, preferably about 4 ⁇ n ⁇ 6, m is an integer of about 0 ⁇ m ⁇ 8, preferably about 1 ⁇ m ⁇ 5;
  • R* -C C -R 3 O CH 2 - -CH -CH 9 -OH
  • R 4 and R 5 are each independently a normal CjH 2 j+i alkyl groups and i is an integer of about 7 ⁇ i ⁇ 15, preferably about 8 ⁇ i ⁇ 10;
  • R 6 , R 7 , R 8 , R 9 , R 10 , and R 11 are each independenly CjH 2 j+i alkyl groups, wherein j is an integer of about 1 ⁇ j ⁇ 20, preferably about 4 ⁇ j ⁇ 8, preferably the alkyl groups exhibit tertiary structures; and
  • R 12 , R 12 , R 12" , and R 12 are each independently a normal alkyl group, C p H 2p+ i, and p is an integer of about 1 ⁇ p ⁇ 12, preferably about 1 ⁇ p ⁇ 5; wherein R 13 , R 13' , R 13 " , and R 13 ' are each independenly a phenol group represented by the general formula:
  • R 14 , R 15 , and R 16 are each independently a normal C o H 2o +i alkyl group and o is an integer of about 1 ⁇ o ⁇ 20, preferably about 2 ⁇ o ⁇ 12, wherein R 15 and R 16 preferably are tertiary structures or exhibit such a form.
  • the aryl or alkyl neutral phosphate of component (a) is present in a concentration of about 0.1 % to 5% by mole, preferably about 0.2% to 2% by mole, based on the total amount of lubricant.
  • a non- limiting example of an aryl neutral phosphate is tricresyl phosphate.
  • the long-chain partial ester of component (b) is present in a concentration from about 0.2% to 6% by mole, preferably about 0.6% to 2% by mole, based on the total amount of lubricant.
  • a non- limiting example of a long chain partial ester is glycerol monooleate.
  • the aryl or alkyl phosphite of component (c) is present in a concentration of about 0.05% to 4.5 % by mole, preferably about 0.18% to 1.8% by mole, based on the total amount of lubricant.
  • a non-limiting example of an aryl phosphite is tris-(2,4- di-tertiary-butyl- phenyl) phosphite.
  • the phenol compound of component (d) is present in a concentration of about 0.005% to 1 % by mole, preferably about 0.02% to 0.3% by mole, based on the total amount of the lubricant.
  • a non-limiting example of a phenol compound is tetrakis-(methyline-3,5-ditert-butyl-4- hydroxy hydrocinnamate) methane.
  • the total concentration of all four additives (a) - (d) combined is about 10% or less by mole based on the total amount of lubricant.
  • Lubricants that the present invention can improve include, but are not limited to, gear oil, bearing oil, sliding surface lubrication oil, chain lubricating oil, and engine oil.
  • various types of lubricants, greases, especially synthetic polyol ester (POE) based lubricants can be used as the lubricating materials.
  • POE polyol ester
  • the present invention is useful as an additive composition for natural and synthetic aviation (aerospace) and automotive lubricants. Moreover, a combination of the multifunctional additive composition with the above- described lubricants improves transmission power throughput, system power density, surface fatigue life, and load-carrying capacity.
  • the present invention provides a method of improving the performance characteristics of a lubricant.
  • the method comprises the step of:
  • a lubricant with a multifunctional lubricant additive composition that includes at least one of components (a) - (d) of the above- described lubricant additive composition thereby producing a fully formulated improved lubricant.
  • the molar concentration of additive components (a) - (d) may be varied to achieve a Formulation #2
  • Formulation #2 contained the following additives:
  • Exxon-Mobil Jet Oil Il contains tricresyl phosphate, which is one example of compound (a). Therefore, it was not necessary to add any additional compound (a) to Formulation #2.
  • Exxon-Mobil Jet Oil Il typically has excellent lubricant performance compared to other brands and versions of MIL-PRF-23699 oil. This multifunctional additive package increased the load carrying capacity (i.e., scuffing or scoring performance) of the Exxon-Mobil Jet Oil Il by a factor of about 1.43 times. Additionally, the components that were tested with Formulation #2 had a surface fatigue life of at least about about 2.9 times greater than that of the components that were tested with the Exxon-Mobil Jet Oil Il alone (unmodified by any additive package of this invention).
  • WAM Load Capacity Test Method (“WAM Test”. The WAM Test is designed to:
  • Table A shows a summary of the modified WAM Test conditions that were utilized to test various lubricants of this invention.
  • Tests can be run with a modified test protocol.
  • the modified protocol operates at a lower entraining velocity than the standard test protocol, which reduces the EHD film thickness and increases the test severity by causing greater asperity interaction, essentially operating at a reduced film thickness to surface roughness (h/ ⁇ ) ratio.
  • Table A summarizes the test parameters that comprise the more severe, modified WAM test protocol that were applied to evaluate the two base (reference) oils and the two Formulations of this invention.
  • Spur gear blanks having a pitch diameter of 4 inches (100 mm), were fabricated from the Carpenter Technology alloy, Pyrowear alloy 53, in vacuum-induction-melted, vacuum-arc-remelted (VIM/VAR) condition. Following rough machining, gear blanks were given a standard heat treatment and carburization cycle and were finish ground to produce gears that conform to minimum standards of AGMA class 12.
  • the arithmetic average surface roughness (Ra) of the spur gear involute surfaces that resulted from the final grinding operation was nominally 16 ⁇ in. Following final grinding, some gears were afforded an isotropic superfinishing (ISF) operation to refine the surface finish on the involute surfaces to a nominal arithmetic average value of 2 ⁇ in.
  • ISF isotropic superfinishing
  • Discrete contact stresses of 235 Ksi (1.62 GPa) or 280 Ksi (1.93 GPa) were applied and maintained until surface failure was detected and confirmed.
  • the ball and disc were composed of AISI 9310 and had a surface hardness of Rc 63 (63 HRC).
  • results from the spur-gear tests are summarized in Table 3 below.
  • Table 3 the average life to surface fatigue failure of as- ground gears lubricated with Formulation #2 at a contact stress of 235 Ksi (1.62 GPa) is a factor of 2.9 times greater than that for as-ground gears lubricated with Exxon-Mobil Jet Oil II.
  • the surface fatigue life of isotropically superfinished (ISF) spur gears lubricated with Formulation #2 at a contact stress of 280 Ksi (1.93 GPa) is a factor of more than 3.3 times greater than that for ISF-processed gears lubricated with Exxon-Mobil Jet Oil II.
  • the multifunctional additive packages of this invention enhanced the scuffing (scoring) performance of the base oil to which they were added and increase the surface-fatigue life of the mechanical component to which they were applied .

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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)

Abstract

L'invention concerne une combinaison ou une composition d'additifs de lubrifiant multifonctionnels permettant d'améliorer la capacité de charge, la résistance à la pression, la durée de vie en fatigue, et d'autres caractéristiques de performance d'un lubrifiant ou d'une huile de base. Cette composition comprend normalement quatre composants: (a) un phosphate neutre d'alkyle ou d'aryle, (b) un ester partiel organique à chaîne longue, (c) un phosphite d'aryle ou d'alkyle, et (d) un groupe phénol. L'invention concerne en outre un lubrifiant multifonctionnel présentant des caractéristiques de performance améliorées, que l'on obtient en mélangeant le lubrifiant avec la combinaison ou la composition d'additifs multifonctionnels de lubrifiant décrites ci-dessus.
EP05858293A 2004-11-04 2005-11-04 Combinaisons d'additifs de lubrifiant permettant d'ameliorer la capacite de charge et la duree de vie en fatigue des surfaces Withdrawn EP1828357A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62541604P 2004-11-04 2004-11-04
PCT/US2005/039764 WO2007001443A2 (fr) 2004-11-04 2005-11-04 Combinaisons d'additifs de lubrifiant permettant d'ameliorer la capacite de charge et la duree de vie en fatigue des surfaces

Publications (1)

Publication Number Publication Date
EP1828357A2 true EP1828357A2 (fr) 2007-09-05

Family

ID=37433747

Family Applications (4)

Application Number Title Priority Date Filing Date
EP05858292A Withdrawn EP1814968A2 (fr) 2004-11-04 2005-11-04 Lubrifiants contenant des preformulations d'additifs multifonctionnelles pour ameliorer la capacite de support de charge, augmenter la longevite a la fatigue en surface et reduire la friction
EP05858294A Withdrawn EP1828358A2 (fr) 2004-11-04 2005-11-04 Composition d'additifs lubrifiants polyvalents pour surface rugueuse de composant mecanique
EP05858293A Withdrawn EP1828357A2 (fr) 2004-11-04 2005-11-04 Combinaisons d'additifs de lubrifiant permettant d'ameliorer la capacite de charge et la duree de vie en fatigue des surfaces
EP05858295A Withdrawn EP1814969A2 (fr) 2004-11-04 2005-11-04 Composition d'additifs lubrifiants polyvalents

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EP05858292A Withdrawn EP1814968A2 (fr) 2004-11-04 2005-11-04 Lubrifiants contenant des preformulations d'additifs multifonctionnelles pour ameliorer la capacite de support de charge, augmenter la longevite a la fatigue en surface et reduire la friction
EP05858294A Withdrawn EP1828358A2 (fr) 2004-11-04 2005-11-04 Composition d'additifs lubrifiants polyvalents pour surface rugueuse de composant mecanique

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US (4) US20090082236A1 (fr)
EP (4) EP1814968A2 (fr)
JP (4) JP2008519126A (fr)
WO (4) WO2007001443A2 (fr)

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WO2006137928A3 (fr) 2007-03-22
US20090137436A1 (en) 2009-05-28
WO2007001443A2 (fr) 2007-01-04
WO2007001444A2 (fr) 2007-01-04
EP1814969A2 (fr) 2007-08-08
WO2007001445A2 (fr) 2007-01-04
WO2007001443A3 (fr) 2007-03-22
WO2007001444A3 (fr) 2007-03-22
JP2008519124A (ja) 2008-06-05
JP2008519125A (ja) 2008-06-05
US20080312116A1 (en) 2008-12-18
JP2008519126A (ja) 2008-06-05
WO2007001445A3 (fr) 2007-03-22
JP5362990B2 (ja) 2013-12-11
EP1814968A2 (fr) 2007-08-08
EP1828358A2 (fr) 2007-09-05
WO2006137928A2 (fr) 2006-12-28
JP2008519127A (ja) 2008-06-05
US20090082236A1 (en) 2009-03-26
US20090011964A1 (en) 2009-01-08

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