Grease containing diamine corrosion inhibitors
AssigneeExxon Research & Engineering Co.
InventorsDavid Leslie Andrew, Brian Leslie Slack
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Abstract
The present invention is directed to a grease containing base oil, a thickener and a hydrocarbyl substituted diamine additive exhibiting enhanced resistance to corrosion.
Claims9
A lubricating grease comprising a major portion of a base oil of lubricating viscosity and a minor portion of additives comprising a thickener and a diamine of the formula ##STR7## wherein R and R' are the same or different and are C.sub.1 -C.sub.30 hydrocarbyl group and the thickener is simple or complex lithium soap, simple or complex calcium soap, mixed lithium and calcium simple or complex soaps, aluminum soaps, urea, di-urea, tri-urea or polyurea.
A method for improving the corrosion resistance of greases thickened using simple or complex lithium soap, simple or complex calcium soap, mixed lithium and calcium simple or complex soaps, aluminum soaps, urea, di-urea, tri-urea or polyurea thickener comprising adding to the grease about 0.01 to 10 wt % of a diamine of the formula ##STR8## wherein R and R' are the same or different and are C.sub.1 to C.sub.30 hydrocarbyl.
Dependencies are inferred from the claim text.