US3171812A - Antiplugging agents for hydroxy stearate greases - Google Patents

Antiplugging agents for hydroxy stearate greases Download PDF

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US3171812A
US3171812A US44857A US4485760A US3171812A US 3171812 A US3171812 A US 3171812A US 44857 A US44857 A US 44857A US 4485760 A US4485760 A US 4485760A US 3171812 A US3171812 A US 3171812A
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grease
calcium
hydroxy stearate
greases
glycerine
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US44857A
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Alcide C Horth
Warren C Pattenden
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ExxonMobil Technology and Engineering Co
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Exxon Research and Engineering Co
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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
    • C10M5/00—Solid or semi-solid compositions containing as the essential lubricating ingredient mineral lubricating oils or fatty oils and their use
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/02—Water
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/08—Inorganic acids or salts thereof
    • C10M2201/082—Inorganic acids or salts thereof containing nitrogen
    • C10M2201/083—Inorganic acids or salts thereof containing nitrogen nitrites
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/026—Butene
    • 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
    • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two 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
    • 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
    • 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
    • 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
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms 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
    • 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
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • 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
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy

Definitions

  • This invention relates to metal hydroxy stearate grease compositions adapted to be dispensed by centralized lubri- Particularly, the invention relates to greases containing a small amount of additive to prevent plugging of small diameter feed lines in centralized lubrication systems.
  • Calcium, lithium and mixed calcium-lithium hydroxy stearate greases are well known in the art and in general, have excellent shear stability and non-bleeding characteristics.
  • these greases are subjected to forced feeding under high pressure through narrow diameter orifices or lines such as are encountered in centralized lubrication systems, there is a tendency for the grease to form hard solid deposits which plug the feed lines of the system. It has been found that by the addition of a small amount of certain agents to the grease, that its resistance to plugging is greatly increased.
  • the antiplugging agents found particularly useful are water, glycerine, and polyalkylene glycols such as polyethylene glycol of 200 to 7,000, preferably 700 to 3,000
  • hydroxy stearate greases particularly calcium hydroxy stearate greases
  • water is not necessary for this purpose, since the hydroxy portion of the molecule acts as a linking agent and imparts fibrousness to the grease.
  • hydroxy stearate greases in practice are completely dehydrated during preparation and it is unconventional to form a finished IZ-hydroxy stearate grease containing free water.
  • Glycerine and polyalkylene glycols are known as structure modifiers.
  • Bondi in US. Patent 2,475,589, describes the addition of glycerine, polyalkylene glycols and naphthenates to greases thickened with a mixture of soaps of hydroxy stearic acid and hydrogenated fish oil fatty acids to minimize bleeding and improve shear stability.
  • calcium, calcium-lithium or lithium 12-hydroxy stearate greases abent the fish oil acid soap
  • Bondi had his additives present during the cooling operation, i.e. present in the melted grease, the process of the present invention preferably involves adding the additives to a cold or slightly warm grease. By this latter method, the loss in hardness (i.e. yield) and color degradation which frequently occurs when glycerol and polyalkylene glycols are present in grease at high temperatures is avoided.
  • the grease compositions of this invention will therefore comprise a major amount of lubricating oil, about 5 to 30, preferably 5 to 15 wt. percent of a metal hydroxy stearate and about 0.1 to 3.0, preferably 0.2 to 1.0 wt. percent of antiplugging agent.
  • the metal component of the hydroxy stearate can be lithium or calcium or a mixture thereof.
  • the lubricating oil is preferably a mineral lubricating oil although synthetic oils such as dieste'rs may be used.
  • oxidation inhibitors such as phenyl-alpha-naphthylamine
  • rust preventives such as sodium nitrite
  • t ackiness agents such as polyisobutylene, dyes, auxiliary thickeners and thelike.
  • the antiplugging additives can be-simply added to the finished grease composition by mixing.
  • these additives are added during the cooling cycle of the preparation of the grease, i.e. at tcmperaturesbelow the melting point of the hydroxy stearate soap,-"e.g. below 200 F.
  • A'Trabon centralized lubrication system was used in order to test the plugging characteristics of the greases of the invention. This system included a pump circulating the grease from a reservoir through small diameter feed tubes and back to the reservoir. "The number of hours of operation before plugging of the system was determined.
  • Example I Two base greases were used in the experiments: Grease A consisted of mineral lubricating oil thickened with 9 wt. percent of calcium-lithium 12-hydroxy stearate thickener in a weight ratio of calcium hydroxy stearate to lithium hydroxy stearate of 4:1.
  • Grease B consisted of mineral lubricating oil thickened with 8.7 wt. percent of calcium 12-hydro-xy stearate and containing about 9.25 wt. percent of extreme pressure additives.
  • To these greases were added varying amounts of water, glycerine and polyethylene glycol of 1500 molecular weight. This addition was made by simply mixing the water, glycerine or polyethylene glycol into the grease at room temperature.
  • the compositions were then tested in the centralized lubrication system previously described above and the time required for plugging of this system recorded. The compositions tested and the results obtained are summarized in the following table:
  • the present invention relates to calcium, lithium and calcium-lithium greases prepared from 12-hydroxy stearic acid and containing a small amount of antiplugging agent.
  • This grease is particularly adapted for use under high pressures, e.g. 500 to 5,000 p.s.i.g., and in small diameter lines, e.g. to A inch lines or orifices.
  • the amount of said metal hydroxy stearate is 5 to 15.0 wt. percent, the amount- 0f said'material is 0.2 to- 1.0 wt.

Description

cation systems. calcium, lithium, or calcium-lithium hydroxy stearate United States Patent Office 3,1 7 1,8 12 Patented Mar. 2, 1 965 3,171,812 ANTIPLUGGING AGENTSFOR HYDROXY STEARATE GREASES Alcide C. Horth, Sarnia, Ontario, and Warren C. Pattenden, Mooretown, Ontario, Canada, assignors to Esso Research and Engineering Company, a corporation of Delaware No Drawing. Filed July 25, 1 960, Ser. No. 44,857 5 Claims. (Cl. 252-40) This invention relates to metal hydroxy stearate grease compositions adapted to be dispensed by centralized lubri- Particularly, the invention relates to greases containing a small amount of additive to prevent plugging of small diameter feed lines in centralized lubrication systems.
Calcium, lithium and mixed calcium-lithium hydroxy stearate greases are well known in the art and in general, have excellent shear stability and non-bleeding characteristics. However, when these greases are subjected to forced feeding under high pressure through narrow diameter orifices or lines such as are encountered in centralized lubrication systems, there is a tendency for the grease to form hard solid deposits which plug the feed lines of the system. It has been found that by the addition of a small amount of certain agents to the grease, that its resistance to plugging is greatly increased.
The antiplugging agents found particularly useful are water, glycerine, and polyalkylene glycols such as polyethylene glycol of 200 to 7,000, preferably 700 to 3,000
molecular weight. It has been further found that a combination of 0.5 to 1.0 part by weight of water per part by weight of glycerine is more effective than a like amount of either water or glycerine. While these materials have been previously used in greases, it is believed that their use and mode of use in the hydroxy sterate greases of the invention is new.
Thus, water has been previously used in low temperature grease systems, particularly in simple calcium soap grease, in order to give the grease a fibrous nature and hold it together. One advantage of the hydroxy stearate greases, particularly calcium hydroxy stearate greases, is that water is not necessary for this purpose, since the hydroxy portion of the molecule acts as a linking agent and imparts fibrousness to the grease. As a result, hydroxy stearate greases in practice are completely dehydrated during preparation and it is unconventional to form a finished IZ-hydroxy stearate grease containing free water.
Glycerine and polyalkylene glycols are known as structure modifiers. Thus, Bondi, in US. Patent 2,475,589, describes the addition of glycerine, polyalkylene glycols and naphthenates to greases thickened with a mixture of soaps of hydroxy stearic acid and hydrogenated fish oil fatty acids to minimize bleeding and improve shear stability. However, calcium, calcium-lithium or lithium 12-hydroxy stearate greases (absent the fish oil acid soap) do not require structure modifiers as taught by Bondi. In addition, while Bondi had his additives present during the cooling operation, i.e. present in the melted grease, the process of the present invention preferably involves adding the additives to a cold or slightly warm grease. By this latter method, the loss in hardness (i.e. yield) and color degradation which frequently occurs when glycerol and polyalkylene glycols are present in grease at high temperatures is avoided.
The grease compositions of this invention will therefore comprise a major amount of lubricating oil, about 5 to 30, preferably 5 to 15 wt. percent of a metal hydroxy stearate and about 0.1 to 3.0, preferably 0.2 to 1.0 wt. percent of antiplugging agent.
The metal component of the hydroxy stearate can be lithium or calcium or a mixture thereof. v i
The lubricating oil is preferably a mineral lubricating oil although synthetic oils such as dieste'rs may be used.
Conventional additives can also be'added, including oxidation inhibitors such as phenyl-alpha-naphthylamine; rust preventives such as sodium nitrite; t ackiness agents such as polyisobutylene, dyes, auxiliary thickeners and thelike.
The antiplugging additives can be-simply added to the finished grease composition by mixing. Preferably, these additives are added during the cooling cycle of the preparation of the grease, i.e. at tcmperaturesbelow the melting point of the hydroxy stearate soap,-"e.g. below 200 F.
A'Trabon centralized lubrication system was used in order to test the plugging characteristics of the greases of the invention. This system included a pump circulating the grease from a reservoir through small diameter feed tubes and back to the reservoir. "The number of hours of operation before plugging of the system was determined.
The invention will be further understood by reference to the following examples which include a preferred form of the invention.
Example I Two base greases were used in the experiments: Grease A consisted of mineral lubricating oil thickened with 9 wt. percent of calcium-lithium 12-hydroxy stearate thickener in a weight ratio of calcium hydroxy stearate to lithium hydroxy stearate of 4:1. Grease B consisted of mineral lubricating oil thickened with 8.7 wt. percent of calcium 12-hydro-xy stearate and containing about 9.25 wt. percent of extreme pressure additives. To these greases were added varying amounts of water, glycerine and polyethylene glycol of 1500 molecular weight. This addition was made by simply mixing the water, glycerine or polyethylene glycol into the grease at room temperature. The compositions were then tested in the centralized lubrication system previously described above and the time required for plugging of this system recorded. The compositions tested and the results obtained are summarized in the following table:
EFFECT OF ANTI-PLUGGING ADDIIIVES ON GREASE PERFORMANCE IN A TRABON CENTRALIZED LUBRI- CATION SYSTEM As seen by the preceding table, water, glycerine and polyethylene glycol were all effective in preventing plugging. The maximum pressures upon the grease during testing in the Trabon lubricator were about 2500 p.s.i.g., while the smallest orifices through which the grease was passed were about & inch diameter.
In sum, the present invention relates to calcium, lithium and calcium-lithium greases prepared from 12-hydroxy stearic acid and containing a small amount of antiplugging agent. This grease is particularly adapted for use under high pressures, e.g. 500 to 5,000 p.s.i.g., and in small diameter lines, e.g. to A inch lines or orifices.
"Whatis lclai niedaiszk .1 t.
.1.,Atlubricating grease-s11itab1e. for use in centralized lubrication systems under high pressure comprising a major amount of mineral lubricating oil, about 5 to 30 percen t of a g rea se. thickener consisting essentially of metal hydroxy stearate, and'about 0.1- to 3.0 wtsperce'nt of a. material selected f romthe group consistingot glycerine, polyethyleneglycol of fl 0()to' 7,000. molecular weight, and mixturesl consisting of water and glycerine in a, weight ratio: of from 0.5-,1.0:1, Wherein said metal is selectedfrom the group consisting of calcium, and mixtures of ca1ciurn and,lithium=wherein said'calciurn is present in a major molar amount and wherein-.- all of .said material which is presen-t-wasdadded to a'mixture of said oil and said stearate-atga temperaturerbelow=200 F. 2.v .-A grease composition according to claim 1, wherein sai d rnaterial is glycerine.;; I
3. A greasecornposi on according to claim 1, wherein said material is a ,mixtureof water and glycerine.
, 4 A greasecomposition -accord-ing to claim- 1, wherein said material is polyethylene glycol of,700 to. 3,000 molecularweight. I Y
e i '4 a the amount of said metal hydroxy stearate is 5 to 15.0 wt. percent, the amount- 0f said'material is 0.2 to- 1.0 wt.
percent and said metal consists of calcium.
References Cited in the file of this patent UN TED T TES A NT 2,607,734 Sproule'et a1 Aug. 19, 1952 2,846,394 Brunstrum et al. Augi'fi, 1958 2,898,298 Zweifel etal; Aug. 14, 1959 2,929,782. Sproule et a1. Mar. 22, 1960 FOREIGN PATENTS I 134,363 Australia Sept..21, 1947 Canada July 21, 1959 579,995 t OTHER REFERENCES I The Manufacture and Application of Lubricating Greases,-Boner;, Reinhold Publication Corp., New York I 5. A lubricating grease accordingyto"claim wherein (1 954), pages43-44? l j

Claims (1)

1. A LUBRICATING GREASE SUITABLE FOR USE IN CENTRALIZED LUBRICATION SYSTEMS UNDER HIGH PRESSURE COMPRISING A MAJOR AMOUNT OF MINERAL LUBRICATING OIL, ABOUT 5 TO 30 WT. PERCENT OF A GREASE THICKENER CONSISTING ESSENTIALLY OF METAL HYDROXY STEARATE, AND ABOUT 0.1 TO 3.0 WT. PERCENT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF GLYCERINE, POLYETHYLENE GLYCOL OF 700 TO 7,000 MOLECULAR WEIGHT, AND MIXTURES CONSISTING OF WATER AND GLYCERINE IN A WEIGHT RATIO OF FROM 0.5-1.0:1, WHEREIN SAID METAL IS SELECTED FROM THE GROUP CONSISTING OF CALCIUM, AND MIXTURES OF CALCIUM AND LITHIUM WHEREIN SAID CALCIUM IS PRESENT IN A MAJOR MOLAR AMOUNT AND WHEREIN ALL OF SAID MATERIAL WHICH IS PRESENT WAS ADDED TO A MIXTURE OF SAID OIL AND SAID STEARATE AT A TEMPERATURE BELOW 200*F.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891564A (en) * 1972-02-14 1975-06-24 Texaco Inc Process for preparing mixed lithium-calcium soap thickened greases
US4233876A (en) * 1978-07-27 1980-11-18 Thomas Leahy Method for preventing freeze-up of musical instrument valves and other movable elements

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339715A (en) * 1942-07-13 1944-01-18 Shell Dev Low temperature grease
US2397956A (en) * 1943-01-15 1946-04-09 Internat Lubricant Corp Production of lubricants
US2450254A (en) * 1944-08-10 1948-09-28 Texas Co Lithium base grease and method of preparing the same
US2607734A (en) * 1950-05-20 1952-08-19 Standard Oil Dev Co Process of manufacturing hydroxy acid greases and product thereof
US2846394A (en) * 1954-11-30 1958-08-05 Standard Oil Co Rheopectic grease composition
US2878186A (en) * 1955-04-29 1959-03-17 Socony Mobil Oil Co Inc Grease composition containing sodium and/or lithium soaps of low, intermediate and high molecular weight acids, together with glycerine or related hydroxy-compound
CA579995A (en) * 1959-07-21 F. Nelson Roy Mixed sodium-calcium roller bearing grease
US2898299A (en) * 1957-05-31 1959-08-04 California Research Corp Ester-containing lubricant compositions
US2929782A (en) * 1957-07-17 1960-03-22 Exxon Research Engineering Co Physical combination of calcium and lithium hydroxy stearates for forming greases

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA579995A (en) * 1959-07-21 F. Nelson Roy Mixed sodium-calcium roller bearing grease
US2339715A (en) * 1942-07-13 1944-01-18 Shell Dev Low temperature grease
US2397956A (en) * 1943-01-15 1946-04-09 Internat Lubricant Corp Production of lubricants
US2450254A (en) * 1944-08-10 1948-09-28 Texas Co Lithium base grease and method of preparing the same
US2607734A (en) * 1950-05-20 1952-08-19 Standard Oil Dev Co Process of manufacturing hydroxy acid greases and product thereof
US2846394A (en) * 1954-11-30 1958-08-05 Standard Oil Co Rheopectic grease composition
US2878186A (en) * 1955-04-29 1959-03-17 Socony Mobil Oil Co Inc Grease composition containing sodium and/or lithium soaps of low, intermediate and high molecular weight acids, together with glycerine or related hydroxy-compound
US2898299A (en) * 1957-05-31 1959-08-04 California Research Corp Ester-containing lubricant compositions
US2929782A (en) * 1957-07-17 1960-03-22 Exxon Research Engineering Co Physical combination of calcium and lithium hydroxy stearates for forming greases

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891564A (en) * 1972-02-14 1975-06-24 Texaco Inc Process for preparing mixed lithium-calcium soap thickened greases
US4233876A (en) * 1978-07-27 1980-11-18 Thomas Leahy Method for preventing freeze-up of musical instrument valves and other movable elements

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