EP0675192A1 - Utilisation de composés à base de bismuth dans des compositions de graisse lubrifiante résistants aux pressions extrêmes pour des paliers à roulement présentant ainsi une longévité plus élevée - Google Patents

Utilisation de composés à base de bismuth dans des compositions de graisse lubrifiante résistants aux pressions extrêmes pour des paliers à roulement présentant ainsi une longévité plus élevée Download PDF

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Publication number
EP0675192A1
EP0675192A1 EP95200782A EP95200782A EP0675192A1 EP 0675192 A1 EP0675192 A1 EP 0675192A1 EP 95200782 A EP95200782 A EP 95200782A EP 95200782 A EP95200782 A EP 95200782A EP 0675192 A1 EP0675192 A1 EP 0675192A1
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EP
European Patent Office
Prior art keywords
bismuth
bismuth compounds
extreme pressure
grease
soap
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.)
Granted
Application number
EP95200782A
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German (de)
English (en)
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EP0675192B1 (fr
Inventor
George Tin Yau Wan
Dick Meijer
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SKF Engineering and Research Centre BV
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SKF Engineering and Research Centre BV
SKF Industrial Trading and Development Co BV
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Publication of EP0675192A1 publication Critical patent/EP0675192A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/38—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms
    • C10M129/40—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms monocarboxylic
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/02—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/02—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
    • C10M117/04—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen containing 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
    • C10M119/00—Lubricating compositions characterised by the thickener being a macromolecular compound
    • C10M119/22—Lubricating compositions characterised by the thickener being a macromolecular compound containing halogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M119/00—Lubricating compositions characterised by the thickener being a macromolecular compound
    • C10M119/24—Lubricating compositions characterised by the thickener being a macromolecular compound containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M119/00—Lubricating compositions characterised by the thickener being a macromolecular compound
    • C10M119/30—Lubricating compositions characterised by the thickener being a macromolecular compound containing atoms of elements not provided for in groups C10M119/02 - C10M119/28
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/30—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms
    • C10M129/32—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms monocarboxylic
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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    • C10M129/26—Carboxylic acids; Salts thereof
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    • C10M129/38—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms
    • C10M129/44—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms containing hydroxy groups
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    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/48—Carboxylic acids; Salts thereof having carboxyl groups bound to a carbon atom of a six-membered aromatic ring
    • C10M129/50—Carboxylic acids; Salts thereof having carboxyl groups bound to a carbon atom of a six-membered aromatic ring monocarboxylic
    • C—CHEMISTRY; METALLURGY
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    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/56—Acids of unknown or incompletely defined constitution
    • C10M129/58—Naphthenic acids
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/06—Mixtures of thickeners and additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
    • C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
    • 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
    • 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
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    • C10M2207/10—Carboxylix acids; Neutral salts thereof
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    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/129—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of thirty or more 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
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    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/141—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings monocarboxylic
    • 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/16—Naphthenic acids
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/06—Perfluorinated compounds
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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    • C10M2213/02—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen and halogen only
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    • C10M2213/06—Perfluoro polymers
    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • C—CHEMISTRY; METALLURGY
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    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
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    • 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 invention relates to the use of bismuth-compounds in extreme pressure grease lubricant compositions for application in rolling bearings.
  • extreme pressure grease lubricants are applied in order to make sure that an appropriate amount of lubricant film is always available within the bearing, in particular on the raceways and rolling elements thereof.
  • Such extreme pressure lubricant compositions generally contain an oil, a soap thickener, one or more EP additives and optionally further additives.
  • the EP additives form a friction-reducing film on the metal surfaces of the bearing, usually due to a chemical reaction of the additives with the surface metals.
  • the function of the supplied lubricant extreme-pressure additives is to minimize wear and to prevent scuffing and welding between contacting surfaces.
  • lead/sulfur-containing additives can be used.
  • Extreme pressure lubricant compositions also contain a soap thickener, such as lithium 12-hydroxy stearate, which provides the grease with the desired physical and chemical structure.
  • a soap thickener such as lithium 12-hydroxy stearate
  • the grease should be able to maintain this structure in the bearing as long as possible under high temperature, vibratory and mechanical shearing action.
  • the grease In cases where the soap structure is damaged the grease is no longer able to hold the oil in place, which will then drain away out of the bearing. As a consequence the lubricating properties of the grease are lost and the bearing service life is reduced considerably if the grease is not replenished at short intervals. Furthermore, the grease should be chemically non-aggressive with respect to the metal parts of the bearing, in particular with the above environment with high temperatures and vibration.
  • a bismuth containing additive and especially an EP additive, a bismuth containing soap, or both can be used.
  • a grease containing a bismuth additive is known from NLGI SPOKESMAN, Vol. 57, Nr. 2, May 1993, O. ROHR "Bismuth, a new metallic but non-toxic replacement for lead as EP additive in greases", pages 6.50 - 13.57.
  • a bismuth additive promotes the formation of a film on the rolling bearing metal surfaces and therefore could serve as a replacement for lead as extreme pressure additive in grease.
  • the bismuth additive indeed appears to offer even better lubricating properties than a lead additive, in particular under high load, high temperature and high sliding speed conditions.
  • the organo-bismuth compound functions as a corrosion inhibitor and as an anti-oxidant.
  • the invention therefore relates to the use of bismuth compounds in an extreme pressure lubricant for rolling bearing applications as an additive for extending the useful service life of rolling bearings.
  • the invention relates to the use of a bismuth containing soap in an extreme pressure lubricant for rolling bearing applications for extending the useful service life of rolling bearings.
  • the invention relates to a method for preparing an extreme pressure lubricant in which a bismuth containing soap is mixed with an oil and optionally one or more EP- or other additives.
  • a bismuth containing soap is used it is not strictly necessary to use Bi-containing or other EP-additives.
  • these compounds are in general bismuth carboxylates of the formula (R-CO2)3Bi, in which R is a branched, straight or cyclic alkyl group with 1-30 carbon atoms or an aryl, alkaryl or aralkyl group with 5-20 carbon atoms.
  • Paraffinic bismuth carboxylates with 6-10 carbon atoms or naphthenic bismuth carboxylates are preferred, such as bismuth naphthenate and bismuth octoate.
  • bismuth compounds as EP additives according to the invention is not limited to the bismuth compounds mentioned above, and other organo bismuth compounds can be used, such as the bismuth containing additives known from the above prior art, or compounds analogous to known lead/sulfur-EP additives, in which the lead is replaced by bismuth.
  • the bismuth containing EP additives are used to partly or completely replace known EP additives, such as lead/sulfur additives or sulfur/phosphorous additives in extreme pressure lubricant compositions.
  • the bismuth compound when used as an EP additive it can be added to the soap, the oil or to the already formed mixture of the oil and the soap thickener. Usually and preferably the additive is admixed with the oil.
  • the bismuth containing EP additives are used in the usual amounts, in general the amount of bismuth will be 0,1-5 % by weight of the total lubricant composition. Mixtures of one or more bismuth compounds can be used, optionally in admixture with one or more other EP additives. Further conventional additives for lubricant compositions can be used in usual amounts, if desired.
  • the bismuth containing EP additives can be soluble or non-soluble in the oil component of the lubricant composition.
  • the bismuth containing EP additives can also be used in extreme pressure lubricant compositions, which contain for instance non-soap thickeners, such as polyurea-based compounds, polytetrafluorethylene or silicone as a thickener instead of a soap.
  • non-soap thickeners such as polyurea-based compounds, polytetrafluorethylene or silicone as a thickener instead of a soap.
  • this soap is usually a bismuth-salt of a fatty acid with 10-30 carbon atoms or a derivative thereof.
  • the bismuth analogues of known soap-thickeners are used, in which the bismuth replaces the metal, i.e. barium, aluminium, calcium, lithium, sodium, strontium etc. Examples are bismuth stearate, bismuth tristearate, bismuth tripalmetate, bismuth trioleate and derivatives thereof, such as bismuth 12-hydroxy stearate.
  • the bismuth soap can contain the same or different fatty acid groups. Also mixtures of bismuth containing soaps can be used.
  • the bismuth containing soap is used in the usual amounts, depending upon the desired properties of the final lubricant composition. In general, this amount will vary between 5-14 % by weight of the total composition for a "soft" grease to 15-25 % by weight of the total composition for a "stiff" grease.
  • the bismuth containing soap can also be used in combination with known soaps containing other metals, such as lithium-soaps or calcium-soaps in a grease formulation. This will reduce the costs of the final extreme pressure lubricant composition.
  • the invention furthermore relates to a method for preparing an extreme pressure lubricant composition in which a bismuth containing soap or thickener is mixed with an oil and optionally one or more EP- or other additives.
  • a bismuth containing soap or thickener is mixed with an oil and optionally one or more EP- or other additives.
  • the mixing of the soap, the oil and the thickener can be carried out in a manner known per se for the preparation of EP greases from the prior art.
  • a bismuth containing EP additive as mentioned above is used.
  • the bismuth containing soap, the oil and the EP additives and other additives are used in the usual amounts.
  • the bearing service life is further increased by the favourable influence of the bismuth additive on stress corrosion and fatigue life.
  • Non-limiting example 2 illustrates the preparation of a bismuth-containing soap of the invention.
  • the grease samples 1, 2 and 4 are further described in Table 2.
  • Table 3 shows the bearing life test results of SKF LGEP2 (sample 4) and the two Bi-greases (samples 1 and 2). It shows that the observed L10 life of both bismuth greases is about 2 times longer than the reference grease LGEP2. Based on the statistical hypothesis test procedures, the comparison of L10 life between LGEP2 and the bismuth greases is classed as weakly significant i.e. the probability of significance is greater than 80%, but less than 90%. The test comparison of the L50 life between LGEP2 and sample 3 is statistically significant (i.e. >90% probability).
  • Figure 2 shows the spectrum plot of a test bearing (#22). It can be seen that the frequency at 205 Hz is due to a ball defect, outer ring defect frequency is at 157 Hz, and the 230 Hz frequency is attributed to inner ring defect. Post investigation of the failed bearing confirmed the spectrum data. In general, all the failed bearings due to rolling contact fatigue were detected and recorded by the SKF CoMo monitoring system.
  • Figure 3 shows a time trend versus the overall spectrum energy value plot for a bearing (#23). This was the criterion used to terminate the test automatically when the overall value increase to a set alarm level (A2) as shown.
  • Figure 4 illustrates a plot of temperature recorded versus time. The machine of a test group bearings (#3 and #4) stopped due to a sudden increase in temperature of bearing #3 after approximately 680 hours of running.
  • Grease samples 1 and 2 have also been shown to give better shear stability than grease sample 4 containing S/P additive.
  • the poor results for sample 4 are due to the softening of grease structure, resulting an excessive oil leakage from the grease.
  • sample 3 prolonges the roller bearing life of flange-roller bearings and avoids the possible adverse effect of an S/P EP additive on fatigue life.
  • the bismuth soap is prepared as other metal soaps such as lead soap. This preparation can be carried out in either an open vessel or an autoclave.
  • Normal bismuth base grease can be prepared by:
  • the mixed complex bismuth base lubricating greases can also be prepared according to the preparation technology of other metal soaps such as lead or lithium.

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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)
  • Rolling Contact Bearings (AREA)
EP95200782A 1994-03-28 1995-03-28 Utilisation de composés organiques à base de bismuth dans des compositions de graisse lubrifiante résistants aux pressions extrêmes pour des paliers à roulement présentant ainsi une longévité plus élevée Expired - Lifetime EP0675192B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9400493A NL9400493A (nl) 1994-03-28 1994-03-28 Gebruik van bismut-verbindingen in vet-smeermiddel-samenstellingen voor hoge drukken voor wentellager-toepassingen met lange levensduur.
NL9400493 1994-03-28

Publications (2)

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EP0675192A1 true EP0675192A1 (fr) 1995-10-04
EP0675192B1 EP0675192B1 (fr) 2002-09-11

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JP (1) JP3727683B2 (fr)
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1002587C2 (nl) * 1996-03-12 1997-09-15 Skf Ind Trading & Dev Geleidende polymeer-verdikte smeervetsamenstellingen.
WO1998008921A1 (fr) * 1996-08-28 1998-03-05 Henkel Kommanditgesellschaft Auf Aktien Utilisation de composes bismuth dans des refrigerants lubrifiants
US5846918A (en) * 1996-03-12 1998-12-08 Skf Industrial Trading & Development Company B.V. Polymer thickened lubricants for high operating temperatures
US5874391A (en) * 1994-09-09 1999-02-23 Skf Industrial Trading & Development Company B.V. Polymer thickened lubricating grease
US6090755A (en) * 1994-03-28 2000-07-18 Skf Industrial Trading & Development Company, B.V. Use of bismuth compounds in extreme pressure grease lubricant compositions for rolling bearing applications with extended service life
WO2003008521A2 (fr) * 2001-07-18 2003-01-30 Sfr Corporation Agent d'amelioration pour huile a moteur
EP1498472A3 (fr) * 2003-07-04 2005-02-23 Koyo Seiko Co., Ltd. Composition de graisse lubrifiante pour un palier à roulement
US7910525B2 (en) 2005-04-20 2011-03-22 Ntn Corporation Grease composition, grease-enclosed bearing, and rotation-transmitting apparatus with built-in one way clutch
WO2012076638A1 (fr) * 2010-12-09 2012-06-14 Aktiebolaget Skf Compositions de graisse épaissies par polymères présentant des propriétés supérieures en termes de faible coefficient de frottement
CN105925360A (zh) * 2016-05-04 2016-09-07 金陵科技学院 一种添加自修复剂锂基润滑脂的制备方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4262630B2 (ja) * 2004-04-08 2009-05-13 Ｎｔｎ株式会社 鉄道車両用軸受
JP4262668B2 (ja) * 2004-02-09 2009-05-13 Ｎｔｎ株式会社 グリース組成物および転がり軸受
US8003582B2 (en) 2004-02-09 2011-08-23 Ntn Corporation Grease, rolling bearing, constant velocity joint, and rolling parts
JP4754818B2 (ja) * 2004-12-28 2011-08-24 Ｊｆｅスチール株式会社 継目無鋼管熱間圧延用潤滑剤
US20090003742A1 (en) * 2005-01-24 2009-01-01 Nsk Ltd. Grease Composition For Hub Unit Bearing, And Hub Unit Bearing For Vehicle
JP4838549B2 (ja) * 2005-08-04 2011-12-14 Ｎｔｎ株式会社 グリース組成物および該グリース封入転がり軸受

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GB809731A (en) * 1956-09-06 1959-03-04 Midland Silicones Ltd Organosiloxane greases
US3028334A (en) * 1954-01-29 1962-04-03 Exxon Research Engineering Co Lubricants resistant to atomic radiation
GB1322699A (en) * 1970-09-11 1973-07-11 Inst Francais Du Petrole Stabilized lubricating compositions
US3839209A (en) * 1969-03-24 1974-10-01 Coussinets Ste Indle Organometallic anti-friction compositions and their method of manufacture
SU827538A1 (ru) * 1978-08-14 1981-05-07 Гомельский Государственный Университет Антифрикционна металлоплакирующа смазка
SU1384603A1 (ru) * 1986-05-26 1988-03-30 Гомельский Государственный Университет Присадка к смазочным маслам
EP0556404A1 (fr) * 1991-08-05 1993-08-25 Tonen Corporation Composition d'huile lubrifiante
US5266225A (en) * 1991-12-31 1993-11-30 Action Testing And Consulting Laboratory, Inc. Lubricating oil and lubricating oil additives
WO1994024100A1 (fr) * 1993-04-20 1994-10-27 Imperial Chemical Industries Plc Dithiocarbamates de bismuth et leur utilisation comme additifs pour lubrifiants

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GB795811A (en) * 1954-11-11 1958-05-28 Wakefield & Co Ltd C C Improvements in or relating to lubricating oil compositions
GB809731A (en) * 1956-09-06 1959-03-04 Midland Silicones Ltd Organosiloxane greases
US3839209A (en) * 1969-03-24 1974-10-01 Coussinets Ste Indle Organometallic anti-friction compositions and their method of manufacture
GB1322699A (en) * 1970-09-11 1973-07-11 Inst Francais Du Petrole Stabilized lubricating compositions
SU827538A1 (ru) * 1978-08-14 1981-05-07 Гомельский Государственный Университет Антифрикционна металлоплакирующа смазка
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6090755A (en) * 1994-03-28 2000-07-18 Skf Industrial Trading & Development Company, B.V. Use of bismuth compounds in extreme pressure grease lubricant compositions for rolling bearing applications with extended service life
US5874391A (en) * 1994-09-09 1999-02-23 Skf Industrial Trading & Development Company B.V. Polymer thickened lubricating grease
NL1002587C2 (nl) * 1996-03-12 1997-09-15 Skf Ind Trading & Dev Geleidende polymeer-verdikte smeervetsamenstellingen.
EP0795598A1 (fr) * 1996-03-12 1997-09-17 SKF Industrial Trading & Development Company, B.V. Compositions de graisse conductrices épaissies à l'aide de polymère
US5773394A (en) * 1996-03-12 1998-06-30 Skf Industrial Trading & Development Company B.V. Conducting polymer-thickened grease compositions
US5846918A (en) * 1996-03-12 1998-12-08 Skf Industrial Trading & Development Company B.V. Polymer thickened lubricants for high operating temperatures
WO1998008921A1 (fr) * 1996-08-28 1998-03-05 Henkel Kommanditgesellschaft Auf Aktien Utilisation de composes bismuth dans des refrigerants lubrifiants
WO2003008521A3 (fr) * 2001-07-18 2003-04-03 Sfr Corp Agent d'amelioration pour huile a moteur
WO2003008521A2 (fr) * 2001-07-18 2003-01-30 Sfr Corporation Agent d'amelioration pour huile a moteur
EP1498472A3 (fr) * 2003-07-04 2005-02-23 Koyo Seiko Co., Ltd. Composition de graisse lubrifiante pour un palier à roulement
US7491683B2 (en) 2003-07-04 2009-02-17 Jtekt Corporation Grease composition for rolling bearing and rolling bearing using the same
US7910525B2 (en) 2005-04-20 2011-03-22 Ntn Corporation Grease composition, grease-enclosed bearing, and rotation-transmitting apparatus with built-in one way clutch
WO2012076638A1 (fr) * 2010-12-09 2012-06-14 Aktiebolaget Skf Compositions de graisse épaissies par polymères présentant des propriétés supérieures en termes de faible coefficient de frottement
US9487727B2 (en) 2010-12-09 2016-11-08 Aktiebolaget Skf Polymer thickened grease compositions with improved low friction properties
CN105925360A (zh) * 2016-05-04 2016-09-07 金陵科技学院 一种添加自修复剂锂基润滑脂的制备方法
CN105925360B (zh) * 2016-05-04 2019-04-09 金陵科技学院 一种添加自修复剂锂基润滑脂的制备方法

Also Published As

Publication number Publication date
DE69528100D1 (de) 2002-10-17
NL9400493A (nl) 1995-11-01
JP3727683B2 (ja) 2005-12-14
EP0675192B1 (fr) 2002-09-11
DE69528100T2 (de) 2003-01-02
JPH0841478A (ja) 1996-02-13

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