Elastohydrodynamic and boundary lubricant and method of lubricating
AssigneeThe Charles Stark Draper Laboratory, Inc.
InventorJohn R. Williams
Life of this patent
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Abstract
A lubricant compound for use for both boundary and elastohydrodynamic lubrication utilize a hydrocarbon boundary lubricant linked to one or more fluorocarbon elastohydrodynamic lubricants and may be employed alone or as an additive. The lubricant compound lubricates surfaces on which it is disposed over a range of conditions. The boundary lubricant and the elastohydrodynamic lubricant are substituted such that they react with and/or provide desirable lubrication properties for particular surfaces.
Claims40
A lubricant compound comprising the formula:
- BL—Xm—ELn
- wherein:
- BL is a hydrocarbon that is a boundary lubricant;
- EL is a fluorocarbon that is an elastohydrodynamic lubricant, wherein n≧1;
- and
- X is a linking moiety selected from the group consisting of sulfur, nitrogen, phosphorous, thioesters, amides, phosphate ester, and ketones, wherein m≧1.
A lubricant compound comprising the formula:
- BL—Xm—ELn
- wherein:
- BL is a tribromophenyl;
- EL is a fluorocarbon that is an elastohydrodynamic lubricant, wherein n≧1;
- and
- X is a linking moiety, wherein m≧1.
A lubricant compound comprising the formula:
- BL—Xm—ELn
- wherein:
- BL is a trimethylphenyl;
- EL is a fluorocarbon that is an elastohydrodynamic lubricant, wherein n≧1;
- and
- X is a linking moiety, wherein m≧1.
A lubricant compound comprising the formula:
- BL—Xm—ELn
- wherein:
- BL is a 6-amino-chrysene or hydrocarbon isomers thereof;
- EL is a fluorocarbon that is an elastohydrodynamic lubricant, wherein n≧1;
- and
- X is a linking moiety, wherein m≧1.
A lubricant compound comprising the formula:
- BL—Xm—ELn
- wherein:
- BL is a 6-amino-chrysene or amino substituent isomers thereof;
- EL is a fluorocarbon that is an elastohydrodynamic lubricant, wherein n≧1;
- and
- X is a linking moiety, wherein m≧1.
A lubricant compound comprising the formula:
- BL—Xm—ELn
- wherein:
- BL is a hydrocarbon that is a boundary lubricant;
- EL is a fluorocarbon that is an elastohydrodynamic lubricant, wherein n≧1;
- and
- X is an amide group, wherein m≧1.
A method of lubricating first and second surfaces, the method comprising the steps of:
- providing a lubricant compound comprising (i) a hydrocarbon boundary-lubricant moiety, (ii) a fluorocarbon elastohydrodynamic-lubricant moiety and (iii) a linking moiety linking the boundary-lubricant moiety to the elastohydrodynamic-lubricant moiety, wherein the linking moiety comprises at least one of sulfur, nitrogen, phosphorous, thioesters, amides, phosphate ester, and ketones;
- and
- introducing the lubricant compound to the surfaces, the boundary-lubricant moiety lubricating the first and second surfaces when the surfaces are at rest or in motion at low relative speeds with respect to each other and the elastohydrodynamic-lubricant moiety lubricating the first and second surfaces when the surfaces are in motion at high relative speeds with respect to each other.
A method of lubricating first and second surfaces, the method comprising the steps of:
- providing a lubricant compound comprising (i) a hydrocarbon boundary-lubricant moiety substituted with at least one substituent selected from the group of halogens, nitro, cyano, amino, ester, ether, aldehydes, ketones, acetals, carboxylic acid, phenol and ketals, (ii) a fluorocarbon elastohydrodynamic-lubricant moiety and (iii) a linking moiety linking the boundary-lubricant moiety to the elastohydrodynamic-lubricant moiety;
- and
- introducing the lubricant compound to the surfaces, the boundary-lubricant moiety lubricating the first and second surfaces when the surfaces are at rest or in motion at low relative speeds with respect to each other and the elastohydrodynamic-lubricant moiety lubricating the first and second surfaces when the surfaces are in motion at high relative speeds with respect to each other.
A method of lubricating first and second surfaces, the method comprising the steps of:
- providing a lubricant additive comprising (i) a hydrocarbon boundary-lubricant moiety, (ii) a fluorocarbon elastohydrodynamic-lubricant moiety and (iii) a linking moiety linking the boundary-lubricant moiety to the elastohydrodynamic-lubricant moiety, wherein the linking moiety comprises at least one of sulfur, nitrogen, phosphorous, thioesters, amides, phosphate ester, and ketones;
- adding the lubricant additive to a base lubricant;
- introducing the base lubricant with lubricant additive to the surfaces, the boundary-lubricant moiety lubricating the first and second surfaces when the surfaces are at rest or in motion at low relative speeds with respect to each other and the elastohydrodynamic-lubricant moiety lubricating the first and second surfaces when the surfaces are in motion at high relative speeds with respect to each other.
A method of lubricating first and second surfaces, the method comprising the steps of:
- providing a lubricant additive comprising (i) a hydrocarbon boundary-lubricant moiety substituted with at least one substituent selected from the group of halogens, nitro, cyano, amino, ester, ether, aldehydes, ketones, acetals, carboxylic acid, phenol and ketals, (ii) a fluorocarbon elastohydrodynamic-lubricant moiety and (iii) a linking moiety linking the boundary-lubricant moiety to the elastohydrodynamic-lubricant moiety;
- adding the lubricant additive to a base lubricant;
- introducing the base lubricant with lubricant additive to the surfaces, the boundary-lubricant moiety lubricating the first and second surfaces when the surfaces are at rest or in motion at low relative speeds with respect to each other and the elastohydrodynamic-lubricant moiety lubricating the first and second surfaces when the surfaces are in motion at high relative speeds with respect to each other.
Dependencies are inferred from the claim text.