US2201258A - Extreme pressure lubricant - Google Patents
Extreme pressure lubricant Download PDFInfo
- Publication number
- US2201258A US2201258A US95431A US9543136A US2201258A US 2201258 A US2201258 A US 2201258A US 95431 A US95431 A US 95431A US 9543136 A US9543136 A US 9543136A US 2201258 A US2201258 A US 2201258A
- Authority
- US
- United States
- Prior art keywords
- oil
- lubricant
- composition
- extreme pressure
- pressure lubricant
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M1/00—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants
- C10M1/08—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants with 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
- C10M2207/40—Fatty vegetable or animal oils
-
- 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
- C10M2207/40—Fatty vegetable or animal oils
- C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
-
- 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
- C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
- C10M2219/102—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon only in the ring
-
- 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
- C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
- C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
-
- 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
- C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
- C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
- C10M2219/106—Thiadiazoles
-
- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/08—Groups 4 or 14
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/042—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for automatic transmissions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/044—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for manual transmissions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/046—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for traction drives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
Definitions
- This invention relates to methods of improving the film strength or load-carrying power of lubricating oils.
- oil soluble as used in this patent is understood to mean that the chemical is soluble in the particular oil or grease used under the temperature conditions prevailing in service.
- lubrican is intended to include both animal and vegetable fats and ofls as well as oils and greases derived from shale, petroleum. etc.
- the solubility of the chemicals in the oil is due, in some cases, to a chemical reaction which often increases the eflectiveness of the chemicals in raising the load-carrying power or film strength oi the lubricant. Probably because of this reaction the effectiveness of many of the chemicals may be increased by heating them with the oil to temperatures above 200 F. before use. I In other cases the chemicals may only be active when the oil is hot, due to the increased rate of difiusion and greater reactivity at the higher temperatures.
- the film strength of the lubricants is expressed as the maximum load which can be applied to the lever arm of a Timken lubricant tester without producing scoring on the ring.
- the film strength of an S. A. E. 50 naphthenic base motor oil is 10 lbs. on the Timken tester. After one per cent of tetramethyl thiuram disulfld CH: CH:
- N CCl to a compounded gear lubricant containing tallow and fatty acids raises the score point from 15 to 52 pounds and five per cent of this compound raises the score point to over pounds.
- Timken tester The results obtained with the Timken tester have been verified by service tests. For example, one per cent of mercaptobenzothiazole bodiments of this invention, and are not intended to limit its scope.
- a composition comprising an oleaginous lubricant and about 1 to 5% of an oil-soluble compound containing at least one carbon atom attached directly to both nitrogen and sulfur.
- composition comprising an oleaginous lubricant and about 1 to 5% of an oil-soluble compound containing at least one carbon atom attached directly to both nitrogen and sulfur and to more than one atom of one of these elements.
- a composition comprising an oleaginous lubricant and. about 1 to 5% of an arylenethiazole compound.
- a composition comprising an oleaginous lubricant and about 1 to 5% of mercaptobenzothiazole.
- a composition comprising an oleaginous lubricant and about 1 to 5% of mercaptobenzothiazole and an organic acid.
- a composition comprising an oleaginous lubricant and about 1' to 5% of chlorbenzothiazole.
- a composition comprising an oleaginous lubricant and about 1 to 5% of a substituted thiuram sulfide.
- a composition comprising an oleaginous lubricant and about 1 to 5% of a tetrasubstituted thiuram disulfide.
- a composition comprising an oleaginous lubricant and about 1 to 5% of tetramethyl thiuram disulfide.
- a composition comprising a lubricating oil and 1% to 5% mercapto benzo thiazole.
- a composition comprising a lubricatingoil and a small proportion, sufficient to impart ex-,
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Description
Patented May 2t,
.PATVENT ore-[cs I mgmnma ranssuan LUBRICANT 9 Warren F. Busse, Akron, Ohio, assignor to The B. F; Goodrich Company, New York, corporation of New York Application August 11, 1936, Serial No. 95,431 I No Drawing.
ll Claims.
This invention relates to methods of improving the film strength or load-carrying power of lubricating oils.
The use of smaller gears and greaterpower in modern automobiles has increased the gear toothpressures to a point where in many cases pure petroleum lubricants are no longer able to keep the metal surfaces apart. 7 As a result the surfaces of the gears may actually fuse or weld 10" together in spots, resulting in rapid wear and scoring which soon makes the gears very noisy, and ultimately may cause a complete failure. Similar problems are encountered in the lubrication of other bearing surfaces which are subjected to high pressures.
*Itisknown that the addition of materials such as carbon tetrachloride, sulfur or lead soaps will increase the film strength of lubricants, but these materials have disadvantages such as corrosive- ,ness, instability in the presence of moisture, or an abrasive action, etc., which often makes them unsatisfactory for commercial lubricants.
I have found that the addition of oil-soluble thiuram monosulfide; tetraphenyl thiuram disulfide; the lead salt of mercaptobenzothiazole; the zinc salt of diphenyl dithiocarbamic acid; benzothiazyl thio'benzoate; thiocarbanilid; 2-chlor,
fi-nitro benzothiazol; 2-chlor naphthothiazole; etc. Some of the chemicals, such as the benzothiazyl disulflde and some of the lead salts, tend to thicken or gel lubricants which contain considerable am'ountsoi naphthenic or unsaturated compounds, so they are particularly useful in making greases. 'I'hesolubility of the chemicais will vary'to some extent with the viscosity and chemical nature of the oil. Two per cent mercaptobenzothiazoie, for example, does not dissolve completely in an S. A. E. 30 paramn-base motor oil, even after heating to C. for several hours. However, it does dissolve at elevated temperatures in a summer black oil and in a compounded oil made by adding tallow to 9. Gulf Coastoil. When the solutions oi the chemical ence of acids such as stearic, benzoic, etc.
'I'he'term oil soluble" as used in this patent is understood to mean that the chemical is soluble in the particular oil or grease used under the temperature conditions prevailing in service. The term lubrican is intended to include both animal and vegetable fats and ofls as well as oils and greases derived from shale, petroleum. etc.
The solubility of the chemicals in the oil is due, in some cases, to a chemical reaction which often increases the eflectiveness of the chemicals in raising the load-carrying power or film strength oi the lubricant. Probably because of this reaction the effectiveness of many of the chemicals may be increased by heating them with the oil to temperatures above 200 F. before use. I In other cases the chemicals may only be active when the oil is hot, due to the increased rate of difiusion and greater reactivity at the higher temperatures.
In the following examples illustrating specific embodiments of this invention, the film strength of the lubricants is expressed as the maximum load which can be applied to the lever arm of a Timken lubricant tester without producing scoring on the ring.
In one test, the film strength of an S. A. E. 50 naphthenic base motor oil is 10 lbs. on the Timken tester. After one per cent of tetramethyl thiuram disulfld CH: CH:
CH: CH:
is dissolved in the oil, it supports a load of '15 with the viscosity of oil used as with the kind of oil. This maybe due in part to the reaction of the chemicals with certain constituents of the oil and in part to the fact that the Tlmken lubricant tester is not sensitive in the region of low film strengths. In a test of a pale neutral oil having an original score point of about five pounds. the increase in film strength on adding two per cent g-chlorbenzothialolo is too small to be measured, but the addition of two per cent 2-chlorbenzothiazole.
N CCl to a compounded gear lubricant containing tallow and fatty acids raises the score point from 15 to 52 pounds and five per cent of this compound raises the score point to over pounds.
When five percent of 2-chlorbenzothiazole is added to' a summer black oil, the score point is raised from 14 to 20 lbs. However, if the oil and chemical are heated to a temperature of around 240 F. for five or ten minutes, only 2 per cent of the chemical is required to raise the score point to 25 lbs.
The results obtained with the Timken tester have been verified by service tests. For example, one per cent of mercaptobenzothiazole bodiments of this invention, and are not intended to limit its scope.
This oil was then used in the motor of a,
I claim:
1. A composition comprising an oleaginous lubricant and about 1 to 5% of an oil-soluble compound containing at least one carbon atom attached directly to both nitrogen and sulfur.
2. A composition comprising an oleaginous lubricant and about 1 to 5% of an oil-soluble compound containing at least one carbon atom attached directly to both nitrogen and sulfur and to more than one atom of one of these elements. i
3. A composition comprising an oleaginous lubricant and. about 1 to 5% of an arylenethiazole compound.
4. A composition comprising an oleaginous lubricant and about 1 to 5% of mercaptobenzothiazole.
5. A composition comprising an oleaginous lubricant and about 1 to 5% of mercaptobenzothiazole and an organic acid.
6. A composition comprising an oleaginous lubricant and about 1' to 5% of chlorbenzothiazole.
7. A composition comprising an oleaginous lubricant and about 1 to 5% of a substituted thiuram sulfide. l
8. A composition comprising an oleaginous lubricant and about 1 to 5% of a tetrasubstituted thiuram disulfide.
9. A composition comprising an oleaginous lubricant and about 1 to 5% of tetramethyl thiuram disulfide.
10. A composition comprising a lubricating oil and 1% to 5% mercapto benzo thiazole.
'11. A composition comprising a lubricatingoil and a small proportion, sufficient to impart ex-,
'treme pressure characteristics to said oil, of
mercapto benzo thiazole.
WARREN F. BUSSE.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US95431A US2201258A (en) | 1936-08-11 | 1936-08-11 | Extreme pressure lubricant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US95431A US2201258A (en) | 1936-08-11 | 1936-08-11 | Extreme pressure lubricant |
Publications (1)
Publication Number | Publication Date |
---|---|
US2201258A true US2201258A (en) | 1940-05-21 |
Family
ID=22251988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US95431A Expired - Lifetime US2201258A (en) | 1936-08-11 | 1936-08-11 | Extreme pressure lubricant |
Country Status (1)
Country | Link |
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US (1) | US2201258A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2504672A (en) * | 1948-11-01 | 1950-04-18 | California Research Corp | Lithium grease |
US2607737A (en) * | 1949-07-09 | 1952-08-19 | California Research Corp | Condensation product of a 2-thiothiazole, formaldehyde, and alkyl phenol to inhibit sulfur corrosive lubricants |
US2620303A (en) * | 1949-07-09 | 1952-12-02 | California Research Corp | Mercaptothiazines as sulfur-corrosion inhibiting agents |
US2758974A (en) * | 1954-12-16 | 1956-08-14 | Texas Co | Synergistic ep additive: a mixture of mercaptobenzothiazole and an arylidene amine |
US3080314A (en) * | 1959-11-13 | 1963-03-05 | Pure Oil Co | Odor-free naphthas |
US3133020A (en) * | 1960-11-21 | 1964-05-12 | Continental Oil Co | Extreme pressure lubricants |
US3174933A (en) * | 1959-02-18 | 1965-03-23 | Bayer Ag | Lubricants, metal-working agents, and hydraulic liquids |
US3249542A (en) * | 1962-07-20 | 1966-05-03 | Socony Mobil Oil Co Inc | Radiation resistant lubricating oil |
US4125479A (en) * | 1975-12-22 | 1978-11-14 | Texaco Inc. | Oxidation inhibited lubricating oil |
US4648985A (en) * | 1984-11-15 | 1987-03-10 | The Whitmore Manufacturing Company | Extreme pressure additives for lubricants |
US5705458A (en) * | 1995-09-19 | 1998-01-06 | The Lubrizol Corporation | Additive compositions for lubricants and functional fluids |
US5834407A (en) * | 1996-08-21 | 1998-11-10 | The Lubrizol Corporation | Lubricants and functional fluids containing heterocyclic compounds |
US5940247A (en) * | 1997-03-26 | 1999-08-17 | International Business Machines Corporation | Magnetic recording device with spindle motor lubricant of specified amine and carbamate concentrations/ratios |
-
1936
- 1936-08-11 US US95431A patent/US2201258A/en not_active Expired - Lifetime
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2504672A (en) * | 1948-11-01 | 1950-04-18 | California Research Corp | Lithium grease |
US2607737A (en) * | 1949-07-09 | 1952-08-19 | California Research Corp | Condensation product of a 2-thiothiazole, formaldehyde, and alkyl phenol to inhibit sulfur corrosive lubricants |
US2620303A (en) * | 1949-07-09 | 1952-12-02 | California Research Corp | Mercaptothiazines as sulfur-corrosion inhibiting agents |
US2758974A (en) * | 1954-12-16 | 1956-08-14 | Texas Co | Synergistic ep additive: a mixture of mercaptobenzothiazole and an arylidene amine |
US3174933A (en) * | 1959-02-18 | 1965-03-23 | Bayer Ag | Lubricants, metal-working agents, and hydraulic liquids |
US3080314A (en) * | 1959-11-13 | 1963-03-05 | Pure Oil Co | Odor-free naphthas |
US3133020A (en) * | 1960-11-21 | 1964-05-12 | Continental Oil Co | Extreme pressure lubricants |
US3249542A (en) * | 1962-07-20 | 1966-05-03 | Socony Mobil Oil Co Inc | Radiation resistant lubricating oil |
US4125479A (en) * | 1975-12-22 | 1978-11-14 | Texaco Inc. | Oxidation inhibited lubricating oil |
US4648985A (en) * | 1984-11-15 | 1987-03-10 | The Whitmore Manufacturing Company | Extreme pressure additives for lubricants |
US5705458A (en) * | 1995-09-19 | 1998-01-06 | The Lubrizol Corporation | Additive compositions for lubricants and functional fluids |
US5834407A (en) * | 1996-08-21 | 1998-11-10 | The Lubrizol Corporation | Lubricants and functional fluids containing heterocyclic compounds |
US5940247A (en) * | 1997-03-26 | 1999-08-17 | International Business Machines Corporation | Magnetic recording device with spindle motor lubricant of specified amine and carbamate concentrations/ratios |
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