Power transmitting fluids with improved materials compatibility
AssigneeInfineum International Limited
InventorsRaymond F. Watts, Keith R. Gorda
Life of this patent
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Abstract
A power transmitting fluid comprises a major amount of a lubricating oil and a minor amount of an additive composition. The additive composition comprises: (a) a friction modifier of the formula: (b) an oil-soluble phosphorus compound; and, (c) an ashless dispersant; wherein R1 and R2 may be the same or different and represent linear or branched, saturated or unsaturated hydrocarbyl groups having from 8 to 20 carbon atoms. Z represents a polyoxyalkylene segment or a polyalkoxylated alkyl amine segment. The friction modifiers provide the fluid with improved fluoroelastomer seal compatibility and enhanced copper corrosion compatibility.
Claims11
A power transmitting fluid comprising a major amount of a lubricating oil and a minor amount of an additive composition, the additive composition comprising:
- (a) a friction modifier of the formula:
- (b) an oil-soluble phosphorus compound;
- and
- (c) an ashless dispersant;
- wherein R1 and R2 may be the same or different and represent linear or branched, saturated or unsaturated hydrocarbyl groups having from 8 to 20 carbon atoms,
- wherein each Q independently represents an alkylene group having 1 to 4 carbon atoms,
- wherein b and c are independently an integer from 1 to 6, and
- wherein R9 represents a linear or branched, saturated or unsaturated hydrocarbyl group having from 4 to 20 carbon atoms.
Dependencies are inferred from the claim text.