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US 10,767,133 B2Granted
Protected mercaptophenols and thiophenols for lubricating compositions
AssigneeThe Lubrizol Corporation
InventorRobert D. Dura
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Abstract
A lubricating composition includes an oil of lubricating viscosity and a compound comprising a protected mercaptophenol. The protected mercaptophenol includes a mercapto group in which the hydrogen is substituted with a substituent of at least 5 carbons. The substituent is selected from hydroxy-substituted hydrocarbyl groups, poly(ether) groups, hydrocarbyl groups, and mixtures and salts thereof.
Claims7
A lubricating composition comprising:
- at least 10 wt. % of an oil of lubricating viscosity comprising at least one of an API Group I, Group II, Group III, Group IV, and Group V base oil;
- and
- at least 0.01 wt. % of a compound comprising a protected mercaptophenol represented by the salt form of Formula I:
- where R1 is a poly(ether) group;
- n is 1;
- x is 0, and
- a cation selected from metal cations and pnictogen cations, the pnictogen cations being cations comprising elements in column 15 of the periodic table.
4 more elements
A method of lubricating a mechanical device comprising supplying to the device a lubricating composition having
- at least 10 wt. % of an oil of lubricating viscosity comprising at least one of an API Group I, Group II, Group III, Group IV, and Group V base oil;
- and
- at least 0.01 wt. % of a compound comprising a protected mercaptophenol represented by the salt form of Formula I:
- where R1 is a poly(ether) group;
- wherein the poly(ether) group is of the form —(CH2CHR4—O)mR5, wherein each R4 is independently selected from H and an alkyl group which has no heteroatoms, and each R5 is independently selected from hydrogen and an alkyl group which has no heteroatoms, and m is at least 1;
- n is 1;
- x is 0, and
- a cation selected from metal cations and pnictogen cations, the pnictogen cations being cations comprising elements in column 15 of the periodic table.
5 more elements
Dependencies are inferred from the claim text.