Metal overbased fatty amines further derivatized to contain covalently bound sulfer and/or phorphorus useful as antiwear/extreme pressure additives

摘要

An antiwear/extreme pressure composition is disclosed that comprises a metal overbased amine of the structurePPR.sup. 1 R.sup.2 NH(MA).sub.xPPwherein R.sup.1 and R.sup.2 are each independently hydrogen, or a hydrocarbyl group, amino-substituted hydrocarbyl group, hydroxy-substituted hydrocarbyl group, alkoxy- substituted hydrocarbyl group or amino groups wherein the hydrocarbyl group contains from 4 to 50 carbon atoms, provided that R.sup.1 and R.sup. 2 are not both hydrogen, M is a metal, A is carbonate, sulfite, sulfate, thiosulfate, phosphite, phosphate, or mixtures thereof, and x has a value of from 1.1 to 40;P Pwherein said metal overbased amine is reacted with carbon disulfide to form a sulfur derivative of a metal overbased amine, an epoxide followed by phosphorus pentoxide to form a phosphorus derivative of a metal overbased amine or wherein the sulfur derivative is further reacted with an epoxide followed by phosphorus pentoxide to form a sulfur and phosphorus derivative of a metal overbased amine. A process for preparing antiwear/extreme pressure derivatives of overbased amines is also disclosed.