Oil-in-oil emulsion lubricants for enhanced lubrication
AssigneeExxonMobil Research and Engineering Company
InventorThomas R. Forbus JR.
Life of this patent
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Abstract
Novel oil-in-oil emulsions and methods of lubrication using the same are provided. The lubricants are stable emulsions of carrier fluid and high viscosity fluid that display superior properties related to lubricating film thickness and reduced shear strength.
Claims57
A lubricant composition comprising:
- (a) carrier fluid;
- and
- (b) higher viscosity fluid, wherein said carrier fluid and said high viscosity fluid are substantially immiscible and together form a stable emulsion having a dynamic viscosity and shear strength, said stable emulsion capable of producing a lubricating film thickness greater than the expected film thickness.
A lubricant composition comprising an emulsion of:
- (a) a carrier fluid;
- and
- (b) a higher viscosity fluid
- wherein
- (a) the carrier fluid comprises a blend of PAO6 and alkylated naphthalenes;
- and
- (b) is a poly-THF ester fluid present in said lubricant in an amount of from about 0.01% to about 10% by weight.
In the method of lubrication by applying a lubricant composition to a mechanical assembly having movable contacting surfaces, the improvement comprising applying a lubricant composition comprising an emulsion of (a) a carrier fluid;
- and (b) a minor amount of a higher viscosity fluid wherein the composition forms a lubricating fluid thickness greater than the expected film thickness.
33 The improvement of claim 30 wherein said lubricating film thickness is at least about 50% greater than said expected film thickness.
A method of lubrication comprising the steps of:
- (a) providing a lubricant composition comprising:
- (i) carrier fluid comprising a blend of PAO6 and alkylated naphthalenes;
- and
- (ii) poly-THF ester fluid wherein said ester fluid is present in the lubricant in an amount of from about 0.01% to about 10% by weight;
- and
- (b) applying said lubricant composition to a mechanical assembly having movable contacting surfaces operating under elastohydrodynamic lubricating conditions.
A lubricant composition prepared by a method comprising the steps of:
- (a) combining carrier fluid and high viscosity fluid to form a mixture, wherein said fluids are substantially immiscible;
- (b) heating said mixture with agitation to a temperature at which said fluids dissolve to form a solution;
- and
- (c) cooling said solution to a temperature at which said fluids separate into a continuous phase and a discontinuous phase to yield an emulsion.
Dependencies are inferred from the claim text.