US2340073A - Lubricating oil - Google Patents

Lubricating oil Download PDF

Info

Publication number
US2340073A
US2340073A US433019A US43301942A US2340073A US 2340073 A US2340073 A US 2340073A US 433019 A US433019 A US 433019A US 43301942 A US43301942 A US 43301942A US 2340073 A US2340073 A US 2340073A
Authority
US
United States
Prior art keywords
castor oil
oil
wide range
phosphate
polymerized
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.)
Expired - Lifetime
Application number
US433019A
Inventor
John D Morgan
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.)
Cities Service Oil Co
Original Assignee
Cities Service Oil Co
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 Cities Service Oil Co filed Critical Cities Service Oil Co
Priority to US433019A priority Critical patent/US2340073A/en
Application granted granted Critical
Publication of US2340073A publication Critical patent/US2340073A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C10M3/00—Liquid compositions essentially based on lubricating components other than mineral lubricating oils or fatty oils and their use as lubricants; Use as lubricants of single liquid substances
    • 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
    • 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
    • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic 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
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic 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
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/286—Esters of polymerised unsaturated 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
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/082—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type 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
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/04—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions containing carbon, hydrogen, halogen, and oxygen
    • C10M2211/044—Acids; Salts or esters 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
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/06—Perfluorinated 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
    • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
    • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
    • C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
    • 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
    • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
    • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
    • C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
    • C10M2219/088—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
    • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
    • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
    • C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
    • C10M2219/089—Overbased 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
    • C10M2223/042—Metal salts thereof
    • 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
    • C10N2010/08—Groups 4 or 14

Definitions

  • the aeroplane is an example of a machine that is required to be operated through a wide range of temperatures. ,Some of the parts and the instruments on the planes must be lubricated and freely movable at temperatures as low as 50 F. and as high as 200 F.
  • the primary object of to has lubricating qualities over a wide range of temperature and is particularly adapted for use at low temperatures.
  • Mineral oil lubricants which have a low pour test and especially those lubricants that are mobile liquids at 50 F.
  • triethyl hosphate may be substituted in the above formula.
  • the tributyl and triethyl phosphates have luricating nese liquids have a very low pour point characaristic.
  • the mixture of the tributyl or trlethyl hosphates hich has a pourpo'int of 75
  • the polymerized castor oil is F. to 80 F.
  • the heat treatment of the castor oil may be done under atmospheric pressure or under comparatively high pressure. In' either case the heat treatment should be carried out so that the temperature of the oil will not be carried above 570 F.
  • the heat treatment of castor oil is preferably carried out in an inert atmosphere, such as carbon dioxide, or nitrogen, and this tends to destroy those portions of the castor oil that readily becomes rancid.
  • the polymerized castor-oil has oiliness characteristics and extreme pressure characteristics. Furthermore it has pronounced film forming characteristics that provide a good coating or film on the parts to be lubricated.
  • the lead naphthenate is used in the above formula in a comparatively small amount and has the characteristic of giving the oil an adhesiveness or tackiness that helps it to adhere to the metal parts being lubricated to form a film.
  • the mixture of tributyl phosphate and polymerized castor oil will adhere quite readily to metal parts at the low temperatures at which it is to be used. that is 0 to -40 F., but when it is heated to 200 F. the film becomes very thin or breaks.
  • the extreme pressure agent Polane is a procluct sold Santolube #261 is an additive commonly used in modifying the properties of lubricating oils.
  • additive is manufactured by the Monsanto taining compounds of tin and sulfur. This additive may be defined as a sulfurized tin salt of an alkyl phenol carboxylic acid. The percentage of tin and sulfur in the additive is 3.25 percent'and treatment to polymerize a por-' 0.8 percent by weight respectively.
  • This additive is a pour point depressant and an antioxidant and acts also as an inhibitor for preventing corrosion to the metallic parts being lubricated.
  • the lubricating oil containing tributyl phosphate as outlined in the formula above is a stable liquid at temperatures of 200 F. and above. This liquid has the following Saybolt viscosity characteristics:
  • a wide range of temperature lubricant consisting of approximately one part ofvpolymerized castor oil to four parts of tributyl phosphate which is inhibited against oxidation and corrosion by a small amount of an ester of a fatty acid and a silfurized tin salt of an alkyl phenol carboxylic aci 3.
  • a wide range of temperature lubricant consisting of a major portion of triethyl phosphate and polymerized castor oil inhibited against oxidation and corrosion.
  • a wide range of temperature lubricant consisting of a major portion of tributyl phosphate and polymerized castor oil, a minor portion of an extreme pressure additive, said mixture being inhibited against oxidation and corrosion.
  • a wide range of temperature lubricant consisting of essentially tributyl phosphate and polymerized castor oil to which are added minor portions of lead naphthenate, an ester of a fatty acid and a sulfurized tin salt of an alkyl phenol carboxylic acid.
  • a wide range of temperature lubricant comprising tributyl phosphate '78 percent by volume, polymerized castor oil 20 percent by volume, lead naphthenate 0.75 percent by volume, an ester of a fatty acid 1 percent by volume, and a sulfurized tin salt of an alkyl phenol carboxylic acid 0.25 percent by volume.
  • a widerange of temperature lubricant having a pour point below 60 F. consisting of a mixture of tributyl phosphate and polymerized castor oil inhibited against oxidation and having a viscosity of approximately 1350 seconds at -40 F. and seconds at 200 F.
  • a wide range of temperature lubricant consisting of a major portion of a trialkyl phosphate and polymerized castor oil inhibited against oxidation and corrosion and having substantial film forming characteristics in the temperature range of F. to 200 F.

Description

John D. Morgan,
Cities fiel'vice Oil South @range,
@ompany corporation oi Fe m 1 i No Brewing. Application March 2, 194? I Serial No.
8 Claims. 7 (Cl. 252-37) peratures.
The aeroplane is an example of a machine that is required to be operated through a wide range of temperatures. ,Some of the parts and the instruments on the planes must be lubricated and freely movable at temperatures as low as 50 F. and as high as 200 F.
The primary object of to has lubricating qualities over a wide range of temperature and is particularly adapted for use at low temperatures.
Mineral oil lubricants which have a low pour test and especially those lubricants that are mobile liquids at 50 F.
- Per cent by volume li'ributyl phosphate 78.00 Polymerized castor oil 20.00 Bead naphthenate 00.75 ?olane 1.00 iantolube #261 00.25
In place of thetributyl phosphate, triethyl hosphate may be substituted in the above formula.
The tributyl and triethyl phosphates have luricating nese liquids have a very low pour point characaristic. The mixture of the tributyl or trlethyl hosphates hich has a pourpo'int of 75 The polymerized castor oil is F. to 80 F.
N. 3., assignor to Hillside, N. 3., a nia merce which is an been given a heat tion of the oil. The ordinary castor oil is insoluble in mineral lubricating oilsbut the polymerized castor oil is soluble in mineral lubricating oils.
ordinary castor oil that has The heat treatment of the castor oil may be done under atmospheric pressure or under comparatively high pressure. In' either case the heat treatment should be carried out so that the temperature of the oil will not be carried above 570 F. The heat treatment of castor oil is preferably carried out in an inert atmosphere, such as carbon dioxide, or nitrogen, and this tends to destroy those portions of the castor oil that readily becomes rancid. The polymerized castor-oil has oiliness characteristics and extreme pressure characteristics. Furthermore it has pronounced film forming characteristics that provide a good coating or film on the parts to be lubricated.
The lead naphthenate is used in the above formula in a comparatively small amount and has the characteristic of giving the oil an adhesiveness or tackiness that helps it to adhere to the metal parts being lubricated to form a film. The mixture of tributyl phosphate and polymerized castor oil will adhere quite readily to metal parts at the low temperatures at which it is to be used. that is 0 to -40 F., but when it is heated to 200 F. the film becomes very thin or breaks.
with castor oil produces a product a product of com- The presence of lead naphthenatetends to form a continuous film at the higher temperatures and seems-t0 have a characteristic of maintaining a practically uniform thickness of film throughout the range of 40 F. to 200 F. Lead naphthenate is quite effective also in rendering the mixture of tributyl phosphate and polymerized castor oil non-corrosive.
The extreme pressure agent Polane, is a procluct sold Santolube #261 is an additive commonly used in modifying the properties of lubricating oils. additive is manufactured by the Monsanto taining compounds of tin and sulfur. This additive may be defined as a sulfurized tin salt of an alkyl phenol carboxylic acid. The percentage of tin and sulfur in the additive is 3.25 percent'and treatment to polymerize a por-' 0.8 percent by weight respectively. This additive is a pour point depressant and an antioxidant and acts also as an inhibitor for preventing corrosion to the metallic parts being lubricated.
The lubricating oil containing tributyl phosphate as outlined in the formula above is a stable liquid at temperatures of 200 F. and above. This liquid has the following Saybolt viscosity characteristics:
Degrees Fahrenheit 1350 seconds at 40 270 seconds at Q.
62 seconds at '77 52 seconds at 100. 35 seconds at -Q 200 The viscosity of the product containing triethyl phosphate is considerably lower throughout the temperature range of 40 F. to 200 F. I
The preferred form of the invention having been thus described, what is claimed as new is:
1. A wide range of temperature lubricant con sisting of a major portion of tributyl phosphate and polymerized castor oil inhibited against oxidation and corrosion.
2. A wide range of temperature lubricant consisting of approximately one part ofvpolymerized castor oil to four parts of tributyl phosphate which is inhibited against oxidation and corrosion by a small amount of an ester of a fatty acid and a silfurized tin salt of an alkyl phenol carboxylic aci 3. A wide range of temperature lubricant consisting of a major portion of triethyl phosphate and polymerized castor oil inhibited against oxidation and corrosion.
4. A wide range of temperature lubricant consisting of a major portion of tributyl phosphate and polymerized castor oil, a minor portion of an extreme pressure additive, said mixture being inhibited against oxidation and corrosion.
5. A wide range of temperature lubricant consisting of essentially tributyl phosphate and polymerized castor oil to which are added minor portions of lead naphthenate, an ester of a fatty acid and a sulfurized tin salt of an alkyl phenol carboxylic acid.
6. A wide range of temperature lubricant comprising tributyl phosphate '78 percent by volume, polymerized castor oil 20 percent by volume, lead naphthenate 0.75 percent by volume, an ester of a fatty acid 1 percent by volume, and a sulfurized tin salt of an alkyl phenol carboxylic acid 0.25 percent by volume.
7. A widerange of temperature lubricant having a pour point below 60 F. consisting of a mixture of tributyl phosphate and polymerized castor oil inhibited against oxidation and having a viscosity of approximately 1350 seconds at -40 F. and seconds at 200 F.
8. A wide range of temperature lubricant consisting of a major portion of a trialkyl phosphate and polymerized castor oil inhibited against oxidation and corrosion and having substantial film forming characteristics in the temperature range of F. to 200 F.
JOHN D. MORGAN.
US433019A 1942-03-02 1942-03-02 Lubricating oil Expired - Lifetime US2340073A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US433019A US2340073A (en) 1942-03-02 1942-03-02 Lubricating oil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US433019A US2340073A (en) 1942-03-02 1942-03-02 Lubricating oil

Publications (1)

Publication Number Publication Date
US2340073A true US2340073A (en) 1944-01-25

Family

ID=23718528

Family Applications (1)

Application Number Title Priority Date Filing Date
US433019A Expired - Lifetime US2340073A (en) 1942-03-02 1942-03-02 Lubricating oil

Country Status (1)

Country Link
US (1) US2340073A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442741A (en) * 1945-09-06 1948-06-01 Cities Service Oil Co High viscosity damping fluid
US2446944A (en) * 1945-07-17 1948-08-10 Citles Service Oil Company High capillarity lubricating oil
US2796400A (en) * 1953-01-28 1957-06-18 Wakefield & Co Ltd C C Lubricating compositions
US5763371A (en) * 1994-07-29 1998-06-09 Witco Corporation Ethylene compressor lubricant containing phospate ester of a monoglyceride or diglyceride

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446944A (en) * 1945-07-17 1948-08-10 Citles Service Oil Company High capillarity lubricating oil
US2442741A (en) * 1945-09-06 1948-06-01 Cities Service Oil Co High viscosity damping fluid
US2796400A (en) * 1953-01-28 1957-06-18 Wakefield & Co Ltd C C Lubricating compositions
US5763371A (en) * 1994-07-29 1998-06-09 Witco Corporation Ethylene compressor lubricant containing phospate ester of a monoglyceride or diglyceride

Similar Documents

Publication Publication Date Title
US2490744A (en) Antirust agent
US2364284A (en) Modified lubricating oil
US2409950A (en) Nonaqueous gel
US2364283A (en) Modified lubricating oil
JPH029079B2 (en)
US2294525A (en) Inhibitor
US2340073A (en) Lubricating oil
US3970570A (en) Antiwear additive mixture
US2307183A (en) Extreme pressure lubricant
US2351280A (en) Lubricant
US2383033A (en) Lubricants
US2709156A (en) Oxidation-inhibited mineral oil compositions
NO135095B (en)
US2410608A (en) Hydraulic liquid having a comparatively small change in viscosity
US2439610A (en) Stabilized organic composition
US3203896A (en) Lubricating composition
US2376312A (en) Constant viscosity greases
US2486188A (en) Lubricant
US2338613A (en) Lubricant
US2173117A (en) Lubricant
US2411153A (en) Mineral oil composition and improving agent
US2405482A (en) Chemical products and process of preparing same
US2209976A (en) Stabilized oil composition
US2340438A (en) Oxidation-stable grease composition
US2392252A (en) Lubricant