Less corrosive organic compounds as lubricant additives
A composition of matter represented by the following formula: where R 1 is an unsaturated or branched hydrocarbon chain, R 2 is either a hydrogen atom or a hydrocarbon chain, and m and n are independently from 1 to 5, when used in a lubricating composition, being effective for friction and wear reduction, while providing improved protection against copper and lead corrosion in an engine.
1. A lubricating composition comprising at least 80% of a lubricating base oil and 0.01-5 weight % of an additive compound represented by the following formula:
where R1 is an unsaturated or branched hydrocarbon chain, R2 is either a hydrogen atom or a hydrocarbon chain, and m and n are independently from 1 to 5.
2. The lubricating composition of claim 1 , wherein the additive compound is the reaction product of
(a) a carboxylic acid or ester;
(b) one of (i) 2-aminoethylethanolamine, (ii) alkyloxypropyl-1,3-diaminopropane (iii) alkyloxyethyl-1,3-diaminopropane, and (iv) alkyloxypropyl-1,2-diaminoethane; and
(c) glycidol.
3. The lubricating composition of claim 1 , wherein the additive compound is present at about 0.20-2.00%.
4. The lubricating composition of claim 1 , wherein the additive compound is chosen from the group consisting of:
N-[2-[(2,3-dihydroxypropyl)(2-hydroxyethyl)amino]ethyl]alkaneamide;
N-[2-[(2,3-dihydroxypropyl)(2-hydroxyethyl)amino]ethyl]isostearamide;
N-[2-[(2,3-dihydroxypropyl)(2-hydroxyethyl)amino]ethyl]oleamide;
N-[3-[(2,3-dihydroxypropyl)(3-alkyloxypropyl)amino]propyl]alkaneamide;
N-[3-[(2,3-dihydroxypropyl)(3-alkyloxypropyl)amino]propyl]isostearamide; and
N-[3-[(2,3-dihydroxypropyl)(3-alkyloxypropyl)amino]propyl]oleamide.
5. A lubricating composition comprising at least 80% of a lubricating base oil and 0.01-5 weight % of an additive being a mixture of compounds represented by the following formula:
wherein said mixture comprises at least one first compound having a hydrocarbon chain which is unsaturated or branched, and at least one second compound having a hydrocarbon chain which is saturated and unbranched; and where R2 is either a hydrogen atom or a hydrocarbon chain, and m and n are independently from 1 to 5.
6. The lubricating composition of claim 5 , wherein the additive is the reaction product of
(a) a carboxylic acid or ester;
(b) one of (i) 2-aminoethylethanolamine, (ii) alkyloxypropyl-1,3-diaminopropane (iii) alkyloxyethyl-1,3-diaminopropane, and (iv) alkyloxypropyl-1,2-diaminoethane; and
(c) glycidol.
7. The lubricating composition of claim 5 , wherein the additive is present at about
0.20-2.00 weight %.
8. The lubricating composition of claim 5 , wherein the additive is chosen from the group consisting of:
N-[2-[(2,3-dihydroxypropyl)(2-hydroxyethyl)amino]ethyl]cocoamide; and
N-[3-[(2,3-dihydroxypropyl)(3-alkyloxypropyl)amino]propyl]cocoamide.