Tartaric acid derivatives as fuel economy improvers and antiwear agents in crankcase oils and preparation thereof
AssigneeThe Lubrizol Corporation, a corporation of the State of Ohio
InventorsJody Kocsis, Jonathan Vilardo, Jason Brown, Daniel Barrer, Richard Vickerman
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Abstract
Formulations using tartaric compounds of the present invention in a low sulfur, low ash and low phosphorous lubricant lower wear, and friction and improves fuel economy.
Claims17
A low-sulfur, low-phosphorus, low-ash lubricant composition suitable for use in an internal combustion engine, comprising:
- (a) an oil of lubricating viscosity, and
- (b) a condensation product of a material represented by formula I and an alcohol or amine having about 8 to about 30 carbon atoms and combinations thereof;
- wherein each R is independently H, or a hydrocarbyl group, or wherein the R groups together form a ring;
- and wherein if R is H, the condensation product is optionally further functionalized by acylation or reaction with a boron compound;
- wherein said lubricant composition has a sulfated ash value of up to about 1.0, a phosphorus content of up to about 0.08 percent by weight and a sulfur content of up to about 0.4.percent by weight.
The composition of claim 45, wherein the metal dialkyldithiophosphate is zinc dialkyldithiophosphate wherein at least about 50 percent of the alkyl groups thereof are secondary alkyl groups.
A method of lubricating an internal combustion engine, comprising supplying to said engine an oil of lubricating viscosity, and a condensation product of a material represented by formula I and an alcohol or amine having about 8 to about 30 carbon atoms and combinations thereof,
- wherein in the product each R is independently H or a hydrocarbyl group, or wherein the R groups together form a ring;
- or wherein if R is H, then the resulting hydroxyl group is further functionalized by acylation or reaction with a boron compound;
- wherein said lubricant composition has a sulfated ash value of up to about 1.0, a phosphorus content of up to about 0.08 percent by weight and a sulfur content of up to about 0.4 percent by weight.
The method of making a lubricant composition comprising:
- (a) blending an oil of lubricating viscosity and a condensation product of a material represented by formula I and an alcohol or amine having about 8 to about 30 carbon atoms and combinations thereof;
- wherein in the product each R is independently H or a hydrocarbyl group, or wherein the R groups together form a ring;
- or wherein if R is H, then the resulting hydroxyl group is further functionalized by acylation or reaction with a boron compound;
- resulting in a lubricant composition wherein said lubricant composition has a sulfated ash value of up to about 1.0, a phosphorus content of up to about 0.08 percent by weight and a sulfur content of up to about 0.4 percent by weight.
Dependencies are inferred from the claim text.