Polyamide fuel additives

Abstract

Method for preventing or reducing corrosion or wear in gasoline engine is provided. The step of the method includes supplying a fuel composition comprising a reaction product of fatty acid and polyamine.

1 . A method for preventing or reducing corrosion or wear in gasoline engine by supplying a fuel composition comprising a reaction product of fatty acid and polyamine. 
     
     
         2 . The method of  claim 1 , wherein the fuel composition comprises a hydrocarbon fuel boiling within range of gasoline or diesel. 
     
     
         3 . The method of  claim 1 , wherein the fatty acid is an aliphatic fatty acid having 2 to 30 carbons. 
     
     
         4 . The method of  claim 3 , wherein the aliphatic fatty acid is hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, 2-ethylbutyric acid, 3,3-dimethylbutyric acid, 2-methylpentanoic acid, 2-methylhexanoic acid, 4-methylhexanoic acid, 5-methylhexanoic acid, 2,2-dimethylpentanoic acid, 2-propylpentanoic acid, 2-ethylhexanoic acid, 2-methylheptanoic acid, isooctanoic acid, 3,5,5-trimethylhexanoic acid, 4-methyloctanoic acid, 4-methylnonanoic acid, isodecanoic acid, 2-butyloctanoic acid, isotridecanoic acid, 2-hexyldecanoic acid, isopalmitic acid, isostearic acid, 3-cyclohexylpropionic acid, 4-cyclohexylbutyric acid, or cyclohexanepentanoic acid. 
     
     
         5 . The method of  claim 1 , wherein the polyamine has about 2 to about 12 nitrogen atoms and about 2 to about 24 carbon atoms. 
     
     
         6 . The method of  claim 1 , wherein the polyamine is diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylene hexamine, poly-alkylene-amines, N, N′-bis-(2-aminoethyl) piperazine), N-[(2-aminoethyl) 2-aminoethyl] piperazine), 1-(2-aminoethyl)-4-[(2-aminoethyl) amino]ethyl]-piperazine) or 1-[2-[2-[(2-aminoethyl) amino]ethyl]amino]ethyl]-piperazine). 
     
     
         7 . A method for preventing or reducing corrosion or wear in gasoline engine while providing anti-wear or friction protection by supplying a fuel composition comprising a fuel additive comprising a reaction product of fatty acid and polyamine. 
     
     
         8 . The method of  claim 7 , wherein the fuel composition comprises a hydrocarbon fuel boiling within range of gasoline or diesel. 
     
     
         9 . The method of  claim 7 , wherein the fatty acid is an aliphatic fatty acid having 2 to 30 carbons. 
     
     
         10 . The method of  claim 9 , wherein the aliphatic fatty acid is hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, 2-ethylbutyric acid, 3,3-dimethylbutyric acid, 2-methylpentanoic acid, 2-methylhexanoic acid, 4-methylhexanoic acid, 5-methylhexanoic acid, 2,2-dimethylpentanoic acid, 2-propylpentanoic acid, 2-ethylhexanoic acid, 2-methylheptanoic acid, isooctanoic acid, 3,5,5-trimethylhexanoic acid, 4-methyloctanoic acid, 4-methylnonanoic acid, isodecanoic acid, 2-butyloctanoic acid, isotridecanoic acid, 2-hexyldecanoic acid, isopalmitic acid, isostearic acid, 3-cyclohexylpropionic acid, 4-cyclohexylbutyric acid, or cyclohexanepentanoic acid. 
     
     
         11 . The method of  claim 7 , wherein the polyamine has about 2 to about 12 nitrogen atoms and about 2 to about 24 carbon atoms. 
     
     
         12 . The method of  claim 7 , wherein the polyamine is diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylene hexamine, poly-alkylene-amines, N, N′-bis-(2-aminoethyl) piperazine), N-[(2-aminoethyl) 2-aminoethyl] piperazine), 1-(2-aminoethyl)-4-[(2-aminoethyl) amino]ethyl]-piperazine) or 1-[2-[[2-[(2-aminoethyl) amino]ethyl]amino]ethyl]-piperazine).