GB577955A - Improvements in lubricating oil compositions by the addition of compounds having oxidation-inhibiting and like qualities - Google Patents
Improvements in lubricating oil compositions by the addition of compounds having oxidation-inhibiting and like qualitiesInfo
- Publication number
- GB577955A GB577955A GB869/43A GB86943A GB577955A GB 577955 A GB577955 A GB 577955A GB 869/43 A GB869/43 A GB 869/43A GB 86943 A GB86943 A GB 86943A GB 577955 A GB577955 A GB 577955A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phenol
- hydroxy
- alkyl
- compounds
- benzyl
- 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
Links
Classifications
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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
- 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
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- 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
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- 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
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- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/16—Paraffin waxes; Petrolatum, e.g. slack wax
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- C10M2205/18—Natural waxes, e.g. ceresin, ozocerite, bees wax, carnauba; Degras
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- 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
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- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
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- C10M2207/027—Neutral salts thereof
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- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
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- C10M2207/16—Naphthenic acids
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- C10M2207/40—Fatty vegetable or animal oils
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- C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
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- C10M2211/042—Alcohols; Ethers; Aldehydes; Ketones
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- C10M2211/044—Acids; Salts or esters thereof
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- C10M2211/06—Perfluorinated compounds
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- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/043—Ammonium or amine salts thereof
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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
- 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
- C10M2223/045—Metal containing thio derivatives
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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
- 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
- C10M2223/047—Thioderivatives not containing metallic elements
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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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/06—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds
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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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/06—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds
- C10M2223/061—Metal salts
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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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/12—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions obtained by phosphorisation of organic compounds, e.g. with PxSy, PxSyHal or PxOy
- C10M2223/121—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions obtained by phosphorisation of organic compounds, e.g. with PxSy, PxSyHal or PxOy of alcohols or phenols
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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
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
- C10M2227/08—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions having metal-to-carbon bonds
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- 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
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- 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
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- 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
- C10N2010/06—Groups 3 or 13
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- 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
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- 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
- C10N2010/14—Group 7
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- 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
- C10N2010/16—Groups 8, 9, or 10
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
- C10N2040/135—Steam engines or turbines
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- 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
- C10N2040/25—Internal-combustion engines
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- 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
-
- 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
- C10N2060/00—Chemical after-treatment of the constituents of the lubricating composition
- C10N2060/04—Oxidation, e.g. ozonisation
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Addition agents for lubricating oils are of the general formula <FORM:0577955/IV/1> where "T" represents a negative element of group VI such as O or S, "X" represents H, an organic radicle, an onium base residue or a metal equivalent, "Y" represents H, or an organic group such as alkyl or aryl, "Z" represents an inorganic negative element or radical such as halogen, -CN or -SCN, or a radical which is linked to "R" by a negative element of groups V and VI such as O, S, P or N, and "R" represents a divalent alkyl linkage <FORM:0577955/IV/2> , "R1" being H, alkyl, or aryl. The type of compound emphasized comprises hydroxy-benzyl chloride, hydroxy-benzyl sulphide, hydroxy-benzyl xanthate, hydroxy-benzyl-alkyl thioether as well as metal salts of each of these. Specific examples comprise chlormethyl di-isobutyl phenol and complex derivatives thereof, bis-(amyl thiomethyl) di-isobutyl phenol, and its Ba salt, and xanthates of chlormethyl di-isobutyl phenols and their Ca salts. The compounds are generally prepared by the normal alkyl phenol-formaldehydehydrogen halide condensation reaction and in the case of sulphur derivatives, metal salts and more complex compounds these are then prepared from the above condensation products. The details are given of the preparation of compounds of the hydroxy benzyl chloride type from HCl, paraformaldehyde and diisobutyl phenol and also complex derivatives starting from these condensates. In some cases, the primary reactants are varied, e.g. using diisobutyl phenol sulphide instead of the phenol.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US425383A US2415833A (en) | 1942-01-01 | 1942-01-01 | Lubricant |
Publications (1)
Publication Number | Publication Date |
---|---|
GB577955A true GB577955A (en) | 1946-06-06 |
Family
ID=23686320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB869/43A Expired GB577955A (en) | 1942-01-01 | 1943-01-18 | Improvements in lubricating oil compositions by the addition of compounds having oxidation-inhibiting and like qualities |
Country Status (3)
Country | Link |
---|---|
US (1) | US2415833A (en) |
FR (1) | FR917266A (en) |
GB (1) | GB577955A (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2526755A (en) * | 1946-03-15 | 1950-10-24 | Texas Co | Turbine oil composition |
US2506900A (en) * | 1947-02-19 | 1950-05-09 | Gulf Oil Corp | Process for preparing addition agents for mineral oil lubricants, the agents so obtained, and mineral oil lubricants containing them |
US2497132A (en) * | 1947-03-14 | 1950-02-14 | Standard Oil Dev Co | Lubricating oil composition |
US2506901A (en) * | 1947-05-26 | 1950-05-09 | Gulf Oil Corp | Addition agents for mineral oil lubricants and compositions containing the same |
US2506902A (en) * | 1947-05-26 | 1950-05-09 | Gulf Oil Corp | Addition agents for mineral oil lubricants and compositions containing the same |
US2472552A (en) * | 1947-06-12 | 1949-06-07 | Gulf Oil Corp | Addition agents for mineral oil lubricants |
US2497099A (en) * | 1947-06-12 | 1950-02-14 | Gulf Oil Corp | Addition agents for mineral oil lubricants and compositions containing the same |
US2472517A (en) * | 1947-06-20 | 1949-06-07 | Gulf Oil Corp | Addition agents for mineral oil lubricants |
US2472518A (en) * | 1947-07-08 | 1949-06-07 | Gulf Oil Corp | Addition agents for mineral oil lubricants |
US2609305A (en) * | 1947-07-24 | 1952-09-02 | Standard Oil Dev Co | Process for preparing asphalt coated aggregate |
US2570402A (en) * | 1947-12-22 | 1951-10-09 | Gulf Research Development Co | Antioxidants for oils and oil compositions containing the same |
US2614988A (en) * | 1948-03-26 | 1952-10-21 | American Cyanamid Co | Hydrocarbon oils containing salkoxymethyl - o,o' - dialkyldithiophosphates |
US2841551A (en) * | 1956-12-24 | 1958-07-01 | Standard Oil Co | Lubricating oil additive and oil containing the same having improved water tolerance |
NL252465A (en) * | 1959-06-10 | |||
US3061586A (en) * | 1959-12-30 | 1962-10-30 | Universal Oil Prod Co | Stabilization of rubber |
US3951830A (en) * | 1973-05-02 | 1976-04-20 | The Lubrizol Corporation | Basic metal salts of sulfur- and methylene-bridged polyphenol compositions, and epoxide-reacted derivatives thereof, and lubricants containing them |
US4612341A (en) * | 1984-02-03 | 1986-09-16 | Ciba-Geigy Corporation | Tri- and tetra-(substituted hydroxyphenylthio) alkane and cycloalkane stabilizers |
EP0273013B2 (en) * | 1986-12-24 | 1996-07-24 | Ciba-Geigy Ag | Substituted phenols as stabilizers |
WO2006095894A1 (en) * | 2005-03-08 | 2006-09-14 | Tokuyama Corporation | Lubricant composition for bonded-abrasive polishing of magnetic head |
US9574149B2 (en) * | 2011-11-11 | 2017-02-21 | Afton Chemical Corporation | Fuel additive for improved performance of direct fuel injected engines |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2020021A (en) * | 1933-11-20 | 1935-11-05 | Standard Oil Co California | Extreme pressure lubricating composition |
US2204620A (en) * | 1934-07-26 | 1940-06-18 | Lubri Zol Dev Corp | Lubricating composition |
NL52401C (en) * | 1936-08-01 | |||
US2161566A (en) * | 1936-08-01 | 1939-06-06 | Socony Vacuum Oil Co Inc | Lubricating oil and method of protecting same |
US2211972A (en) * | 1938-10-04 | 1940-08-20 | Standard Oil Co California | Compounded mineral oil |
USRE22189E (en) * | 1938-11-21 | 1942-09-29 | Lubricating composition | |
US2208161A (en) * | 1939-10-19 | 1940-07-16 | Lubri Zol Dev Corp | Lubricating composition |
US2208162A (en) * | 1940-02-12 | 1940-07-16 | Lubri Zol Dev Corp | Lubricating composition |
US2330722A (en) * | 1940-08-24 | 1943-09-28 | Standard Oil Dev Co | Condensation product and method of preparing and using same |
US2249626A (en) * | 1941-03-13 | 1941-07-15 | American Cyanamid Co | Lubricating composition |
US2270183A (en) * | 1941-03-13 | 1942-01-13 | American Cyanamid Co | Dialkylphenol sulphides |
US2322376A (en) * | 1941-05-13 | 1943-06-22 | Texas Co | Lubricating oil |
-
1942
- 1942-01-01 US US425383A patent/US2415833A/en not_active Expired - Lifetime
-
1943
- 1943-01-18 GB GB869/43A patent/GB577955A/en not_active Expired
-
1945
- 1945-11-13 FR FR917266D patent/FR917266A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2415833A (en) | 1947-02-18 |
FR917266A (en) | 1946-12-31 |
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