Lubricating oil compositions
OwnerAdam Paul Marsh, Mark Jacksoninventors
Life of this patent
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Abstract
A lubricating oil composition comprises 50 mass % or more of an oil of lubricating viscosity and 0.1 to 25 mass % of at least one of compounds of structures (I), (II), or (III). wherein X1 and X2 are the same or different and are OH, NH2 or SH; wherein groups R1 and R2 are the same or different and are linear or branched, saturated or unsaturated hydrocarbon groups having from 1 to 50 carbon atoms, with the proviso that at least one of groups R1 and R2 has at least 4 carbon atoms; and wherein m and n are the same or different and are zero or an integer from 1 to 3 with the proviso that m and n are not both zero. The compositions are useful to ameliorate or prevent deposits in engines and provide good asphaltene dispersancy.
Claims36
A lubricating oil composition comprising 50 mass % or more of an oil of lubricating viscosity and 0.1 to 25 mass % of at least one of compounds of structures (I), (II), or (III):
- wherein X1 and X2 are the same or different and are OH, NH2 or SH;
- wherein groups R1 and R2 are the same or different and are linear or branched, saturated or unsaturated hydrocarbon groups having from 1 to 50 carbon atoms, with the proviso that at least one of groups R1 and R2 has at least 4 carbon atoms;
- and wherein m and n are the same or different and are zero or an integer from 1 to 3 with the proviso that m and n are not both zero, and wherein if m=0, then R1 has at least 4 carbon atoms, and wherein if n=0, then R2 has at least 4 carbon atoms.
A lubricating oil composition comprising 50 mass % or more of an oil of lubricating viscosity and 0.1 to 25 mass % of at least one of compounds A, B, C, and D:
A method to ameliorate or prevent deposits in an engine during its operation comprising the use of a lubricating oil composition comprising at least one compound of structures (I), (II), or (III):
- wherein X1 and X2 are the same or different and are OH, NH2 or SH;
- wherein groups R1 and R2 are the same or different and are linear or branched, saturated or unsaturated hydrocarbon groups having from 1 to 50 carbon atoms, with the proviso that at least one of groups R1 and R2 has at least 4 carbon atoms;
- wherein m and n are the same or different and are zero or an integer from 1 to 3 with the proviso that m and n are not both zero, wherein the at least one compound of structure (I), (II), or (III) is present in the lubricating oil composition in an amount of 0.1 to 25 mass %, based on the mass of the composition, and wherein if m=0, then R1 has at least 4 carbon atoms, and wherein if n=0, then R2 has at least 4 carbon atoms.
A method to disperse asphaltenes in a trunk piston marine lubricating oil composition comprising the use of a lubricating oil composition comprising at least one compound of structures (I), (II), or (III) in a trunk piston marine lubricating oil composition during its lubrication of surfaces of the combustion chamber of a compression-ignited marine engine operated by combusting a heavy fuel oil:
- wherein X1 and X2 are the same or different and are OH, NH2 or SH;
- wherein R1 and R2 are the same or different and are linear or branched, saturated or unsaturated hydrocarbon groups having from 1 to 50 carbon atoms, with the proviso that at least one of R1 and R2 has at least 4 carbon atoms;
- wherein m and n are the same or different and are zero or an integer from 1 to 3 with the proviso that m and n are not both zero, and wherein if m=0, then R1 has at least 4 carbon atoms, and wherein if n=0, then R2 has at least 4 carbon atoms.
A lubricating oil composition comprising less than 50 mass % of an oil of lubricating viscosity and 0.1 to 25 mass % of at least one of compounds of structures (I), (II), or (III):
- wherein X1 and X2 are the same or different and are OH, NH2 or SH;
- wherein groups R1 and R2 are the same or different and are linear or branched, saturated or unsaturated hydrocarbon groups having from 1 to 50 carbon atoms, with the proviso that at least one of groups R1 and R2 has at least 4 carbon atoms;
- and wherein m and n are the same or different and are zero or an integer from 1 to 3 with the proviso that m and n are not both zero, and wherein if m=0, then R1 has at least 4 carbon atoms, and wherein if n=0, then R2 has at least 4 carbon atoms.
Dependencies are inferred from the claim text.