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
  • C10M5/00—Solid or semi-solid compositions containing as the essential lubricating ingredient mineral lubricating oils or fatty oils and their use
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J19/06—Solidifying liquids
• • 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
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/086—Chromium oxides, acids or salts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
  • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
  • C10M2203/108—Residual fractions, e.g. bright stocks
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2215/044—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms having cycloaliphatic 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
  • 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
  • C10M2215/24—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions having hydrocarbon substituents containing thirty or more carbon atoms, e.g. nitrogen derivatives of substituted succinic acid
  • C10M2215/26—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
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
  • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
  • C10M2219/046—Overbased sulfonic acid salts
• • 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
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
• • 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
  • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
  • C10N2050/10—Form in which the lubricant is applied to the material being lubricated semi-solid; greasy

Definitions

• This invention relates to lubricating grease compositions. More particularly, it is concerned with grease compositions containing certain classes of water-soluble corrosion inhibitors, calcium mahogany sulfonates, and a gel-forming lithium soap of hydroxy fatty acids.
• Grease compositions broadly comprise a lubricating oil gelled to a grease consistency with a gelling agent which may be an inorganic colloid or, more commonly, relatively high molecular weight metallic soaps. Under the conditions where greases are employed, these compositions are continuously or intermittently subjected to humid or wet atmospheres which provide an aqueous environment which, even in relatively small amounts, permits the corrosion of metallic surfaces being lubricated.
• a gelling agent which may be an inorganic colloid or, more commonly, relatively high molecular weight metallic soaps.
• these compositions are continuously or intermittently subjected to humid or wet atmospheres which provide an aqueous environment which, even in relatively small amounts, permits the corrosion of metallic surfaces being lubricated.
• Several means of avoiding or minimizing these corrosion phenomena have been investigated, such as the use of corrosion resistant alloys, the coating of metal parts (such as metal bearings) with relatively permanent plastic or metallic coatings, the sealing of bearings to prevent the entry of water vapor, and the incorporation of corrosion inhibit
• Corrosion inhibitors are materials well known in the lubricating art and in allied arts wherein metallic equipment must be protected from destructive results of corrosive conditions. Corrosion inhibitors are known to perform their function by several diflerent mechanisms, such as the formation of monomolecular films either by reaction with or adsorption on the metallic surfaces.
• the corrosion inhibitor may be oil-soluble or water-soluble, but since corrosion appears to proceed with greatest rapidity in an aqueous medium, the most effective corrosion inhibitors for most situations are those possessing a substantial amount of water-solubility. The latter state is satisfactory, however, only when the greases are utilized for the protection of metallic surfaces under static or quiescent conditions.
• the problem of non-homogeneity of the grease is not only restricted to a settling of the corrosion inhibitors to the bottom of a storage container but alsois evidenced in an unsatisfactory property referred to as graininess.
• graininess By this is meant the phenomenon of crystal growth of the corrosion inhibitor in the grease composition to such an extent that the crystals are screened out of the grease when the latter is passed through a homogenizing screen toward the end of its manufacturing process. This results in a clogging of the screens and, more importantly, removal of the corrosion inhibitor from the grease composition, leaving the grease deficient in corrosion protective properties.
• lithium hydroxy fatty acid soap greases are favored for their excellent properties in other respects, they have been found to permit an undue amount of corrosion due to their frequent complete loss of affinity for metal surfaces when the grease has adsorbed water to the saturation point even though the grease may still maintain a good consistency.
• This lack of aflinity for metal prevents the grease under wet operating conditions from adhering to the metallic surface and not protecting them from corrosion. It also allows the grease to be easily squeezed or worked out of the bearings leaving them dry of grease with subsequent failure due to the lack of lubrication. This is especially evident under oscillating type of motion, but it also is a major cause of corrosion under static conditions as well.
• the lack of aflinity of lithium hydroxy fatty acid soap greases for metal allows a film of water to form between the grease and the metallic surface and, unless steps are taken to counteract this, results in severe corrosion of the bearing surface.
• the presence of the calcium mahogany sulfonates not only prevents the separation ofthe nitrite (or chromate) from the grease composition, but also does not cause any softening of the grease such as is occasioned by the use of watersoluble sodium soaps, such as sodium stearate and the like.
• the Water-soluble nitrites or chromates to be utilized in accordance with the present invention are well known for their corrosion inhibiting properties. They comprise especially the alkali metal nitrites or chromates, but may include the amine and ammonium nitrites and chromates as well. Typical species of these materials include especially sodium nitrite, potassium nitrite, lithium nitrite, sodium chromate, potassium chromate, ammonium nitrite and ammonium chromate, as well as alkyl ammonium nit-rites. such as diisopropyl ammonium nitrite and cycloaliphatic amine nitrites, typical of which is dicyclohexylamine nitrite.
• the grease compositions are to be used in the grease compositions in amounts between about 0.1 and about 1% by weight of the total soap.
• they are present in the form of aqueous solutions of such concentration that the water is present in amounts between about 0.5 and about 2.5%, based on the total grease weight.
• they may be utilized in substantially anhydrous greases .as well.
• the presence of the nitrite or chromate in the form of an aqueous solution further insures the maintenance of a water-soluble material in non-crystalline form which is most readily available for mixture with any contaminating water, thus rendering the latter non-corrosive to metals with which it comes in contact.
• the problems solved by the present invention comprises the permanent dispersal of this aqueous solution of the water-soluble corrosion inhibitor in such a manner that the consistency of the grease is not degraded. This is efiected by the presence of the calcium mahogany sulfO l tes.
• the calcium hydrocarbyl sulfonates are preferentially oil-soluble, preferably obtained from petroleum sources, and are known as petroleum sulfonates. These are ordinarily obtained in the treatment of petroleum oils to obtain highly refined products of the type of electrical insulating oils, turbine oils and the like, in which the petroleum oils are treated successively with a number of portions of concentrated sulfuric acid or fuming sulfuric acid.
• a variety of compounds are formed by the chemical reactions of sulfuric acid upon the oil including sulfonic acid, organic esters of sulfuric acid, partial esters of sulfuric acid, etc. Most of these compounds are relatively insoluble in the oil under the treating conditions and separate from the oil together with unreacted sulfuric acid as a sludge, which is separated from the oil after each treatment.
• the sulfuric acid is usually added in dumps" of about /2 lb. per gallon of the oil, the- More total quantity of the acid added depending upon the oil being treated and the desired final product. Usually from about 3 pounds to about 9 pounds of sulfuric acid per gallon of oil are used.
• Some of the sulfonic acids resulting from the treatment of the oil with the sulfuric acid are preferentially oil-soluble and. remain in the oil layer after removal of the acid sludge. These can be removed from the oil by neutralizing the acid-treated oil with an alkaline agent such as oxides, hydroxide, or carbonate of a calcium, for example, calcium oxide, to form sulfonic acid soaps or sulfonates which are then extracted from the oil by treatment with 50% to.
• preferentially oil-soluble sulfonates are obtained from the acid-treated oil, there can be recovered from the acid sludge by suitable solvents preferentially oil-soluble sulfonates or sulfonic acids.
• the term preferentially oil-soluble sulfonates therefore includes the oil-soluble sulfonates from both the acid-treated oil and the acid sludge. referably the sulfonic acids have molecular weights in the order of about 400 to 750.
• the calcium salts or soaps of the subject sulfonic acids may be either the so-called neutral soaps wherein all of the hydroxyl groups of the neutralizing agent such as lime are combined with sulfonic acid radicals, or the so-called basic sulfonates may be employed wherein the metallic radical has one valence attached to a sulfonic acid radical and the other being a hydroxyl substituent.
• the preferred sulfonates are the so-called basic sulfonates having the simplified general formula represented by (RSOQM-OH wherein R is a hydrocarbyl radical, M is a calcium radical, R usually being a naphthenyl, alkyl naphthenyl, alkaryl or naphthenyl aryl radical, such that the weight of the sulfonic acid is that stipulated hereinbefore.
• the calcium mahogany sulfonates are utilized in amounts between about 0.5% and about 5% by weight of the total grease composition and preferably in amounts between about 1% and about 2.5% by weight thereof.
• the lithium soaps utilized as the principal gelling agents for the present invention comprise the soaps of hydroxy fatty acids having between about 12 and about 24 carbon atoms per molecule. These are typified by the acids derived by saponification of hydrogenated castor oil acids which predominate in ricinoleic acid. The glycerides, methyl esters or the free acids may be employed in the saponification procedure. The soap may be formed in situ or may be pro-formed prior to incorporation together with the other grease-forming ingredients. Other suitable hydroxy fatty acids include 9,10-dihydroxy stearic acid, 4-hydroxy palmitic acid, quince oil acids, and the like, however, the hydrogenated castor oil acids are preferred.
• the mineral lubricating oil to be employed as the major ingredient of the present grease compositions may be of any suitable lubricating viscosity, ranging from about 50 SSU' at F. to about 2000 SSU at 100 F.
• the viscosity index of the oil can vary from below 0 to about 100 or higher and the oil can have averagev molecular weights ranging from about 250 to about 800. It may be highly refined and solvent treated if desired by known means.
• the hydrocarbon oil may be of synthetic or mineral origin, although mineral oils are preferred.
• the viscosity of the oil is preferably about 70 SSU at 210 F.
• oils derived from Bright Stock, e. g. residual lubrieating oils, comprise at least one-half of the lubricating oil components.
• Lithium hydroxy fatty acid soaps (ge1- ling proportion) Mineral oil constituting the balance of the composition with the exception of other minor optional ingredients Usually 5'-25%.
• Oxidation inhibitors O.12.5,0.
• the tests were terminated when one of three criteria was reached; first, the grease failed to stick to the interior surfaces, i. e. it lost its metal aflinity. When this occurred the grease would separate from the inside Wall of the cylinder, the roll surface and the cylinder ends, leaving them completely clean with no grease whatsoever adhering to the surfaces. The test also was terminated when the grease would absorb no more water. At this point the water would remain separate from the grease even after the standard rolling period. The third possible means of terminating the test was at the point at which the grease became too soft for further use. This point was arbitrarily chosen at a micro-penetration of 230 drnm.
• lithium IZ-hydroxy stearate grease When between 40 and of the salt Water solution had been added to lithium IZ-hydroxy stearate grease, the latter failed to adhere to the metal surfaces and the test was terminated. None or" the other greases tested lost their metal afiinity at this low a water percentage, and in a number of instances, the tests with these other greases were continued to water concentrations in the order of 140% by weight of the grease and more. Consequently, it will be seen from these results that the lithium hydroxy stearate greases are unique with respect to their limited metallic afiinity the presence of relatively minor amounts of water.
• the static corrosion protection of the subjecftype'of greases was determined by'th'e' glassfjarco'rrosion' 'fest?" which consists in smearing a metallic panel'with'the" grease and immersing the coated panel for 1'20hours" at room temperature in water'conta'ining 0.05% sodium chloride.
• the base grease namely, a" gellingamou'n't of lithiurnl-Z-hydmxy stearate in mineral lubricatingioilcontaining'no inhibitors, permittedhea-vy' corrosion tdo'c'curj' under these test conditions.
• the base grease utilized in the above comparative testing procedures comprised about 8% by Weight of lithium 12-hydroxy stearate, and about 87-91% by weight of mineral lubricating oil. To this was added 0.5 by weight of sodium nitrite contained in about 0.7% by weight of water. 1.5 by weight of calcium mahogany sulfonates was employed where indicated.
• the lubricating oil has a viscosity index of 65.6, and a viscosity of 485 SSU at F, and 57.4 SSU at 210 F.
• the greases were prepared by saponification in the presence of a portion of the oil after which the balance of the oil was added and the mixture heated to 390 F. with circulation through a homogenizing screen. After the mixture had been dehydrated, it was cooled to about 200 F circulation being continued, While the additives (where indicated) were incorporated.
• the calcium mahogany sulfonates were the so-called basic sul'fonates.
• a lubricating composition comprising a mineral lubricating oil as the predominant constituent, the oil being thickened to a grease consistency with lithium 12- ltydroxy steal-ate, said grease also containing about 1.5% calcium mahogany sulfonates, 0.5 sodium nitrite, 0.6% water and 1% phenyl-tt-naphthylamine.
• a lubricating composition comprising a mineral lubricating oil as the predominant constituent, at least about one-half of said oil being a mineral oil Bright Stock, the oil being thickened to a grease consistency with lithium soaps of hydrogenated castor oil acids, 0.55% of calcium salts of mahogany sulfonic acids, 0.1l% by weight of an alkali metal nitrite and 0.52.5% by weight of water.
• a lubricating grease comprising a mineral lubricating oil as the predominant constituent thickened to a grease consistency with about 525% by weight of lithium 7 soaps of soap-forming substantially saturated hydroxy fatty acids, about 0.55% by weight of calcium salts of mahogany sulfonic acids and 0.1-l% by weight of an alkali metal nitrite and 0.5-2.5% by weight of water- 4.
• a lubricating grease comprising a mineral lubricating oil as the predominant constituent thickened to a grease consistency with about 525% by weight of lithium IZ-hydroxy stearate, 0.55% by weight of a calcium salt of mahogany sulfonic acids, and about (Ll-1% by weight of an alkali metal nitrite.
• a lubricating grease comprising a mineral lubricating oil as the predominant constituent thickened to a grease consistency with about 5-25 by weight of lithium soaps of soap-forming substantially saturated hydroxy fatty acids, about 0.5-5% by weight of calcium salts of mahogany sulfonic acids and 0.1-1% by weight of sodium nitrite.
• a lubricating grease comprising a mineral lubricating oil as the predominant constituent thickened to a grease consistency with about 5-25 by weight of lithium soaps of soap-forming substantially saturated hydroxy fatty acids, about 0.5% by weight of calcium salts of mahogany sulfonic acids and 0.1-1% by weight of an alkali metal chromate.
• a lubricating grease comprising a mineral lubricating oil as the predominant constituent thickened to a grease consistency with about 525% by Weight of lithium soaps of soap-forming substantially saturated hydroxy '8 fatty acids, about 0.55% by Weight of calcium salts of mahogany sulfonic acids and (ll-1% by weight of an alkali metal nitrite.
• a lubricating grease comprising a mineral lubricating oil as the predominant constituent thickened to a grease consistency with about 5-25 by weight of lithium soaps of soap-forming substantially saturated hydroxy fatty material, (LS-5% by weight of a calcium salt of mahogany sulfonic acids and about (Ll-1% by weight of a water-soluble corrosion inhibitor of the group consisting of alkali metal nitrites and alkali metal chromates.
• a lubricating grease comprising a mineral lubricating oil as the predominant constituent thickened to a grease consistency with about 525% by weight of lithium soaps of soap-forming substantially saturated hydroxy fatty material, (LS-5% by'weight; of an oil soluble calcium salt of hydrocarbyl sulfonic acids, said acids having molecular weights from about 400 to about 750, and about (Ll-1% by weight of a water-soluble corrosion inhibitor of the group consisting of alkali metal nitrites and alkali metal chromates.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Lubricants (AREA)

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  • BE BE547827D patent/BE547827A/xx unknown
  • NL NL95159D patent/NL95159C/xx active
• 1955
  • 1955-05-17 US US509103A patent/US2820009A/en not_active Expired - Lifetime
• 1956
  • 1956-05-15 DE DEN12240A patent/DE1011111B/de active Pending
  • 1956-05-15 GB GB15083/56A patent/GB793009A/en not_active Expired
  • 1956-05-15 FR FR1153665D patent/FR1153665A/fr not_active Expired

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