Use of a composition in order to improve the spray from the injectors of a combustion engine

Abstract

The present invention provides the use of a composition for improving the atomization of injectors of an internal combustion engine, the composition including, by weight, relative to the total weight of the composition, 60% to 95% of a mixture of at least first and second fatty diamines, the diamines being different, and 5% to 40% of a solvent.

1 . Method of improving the atomization of a fuel or a liquid oxidizer of injectors of an internal combustion engine, which method comprising mixing said fuel or said liquid oxidizer with a composition comprising, by weight, relative to the total weight of said composition, 60% to 95% of a mixture of at least first and second fatty diamines, said diamines being different, and 5% to 40% of a solvent. 
     
     
         2 . Method according to  claim 1 , wherein said first and second diamines are selected from a diamine that includes at least one saturated or unsaturated fatty acid radical having 4 to 20 carbon atoms, or an alkyl radical derived from copra, tallow, or coconut oleic fatty acid. 
     
     
         3 . Method according to  claim 1 , wherein the first diamine satisfies formula I below: 
       
         
           
           
               
               
           
         
       
       where:
   m  is an integer in the range 1 to 8; and 
 R 26 , R 27 , R 28 , and R 29  are independently of one another: hydrogen, a C 1 -C 4  linear or branched alkyl radical, or a C 4 -C 30 , preferably C 8 -C 20 , linear or branched alkyl radical, on condition that at least one from among R 26 , R 27 , R 28 , and R 29  is a C 4 -C 30 , preferably C 8 -C 20 , linear or branched alkyl radical. 
 
     
     
         4 . Method according to  claim 3 , wherein said C 4 -C 30  linear or branched alkyl radical is selected from: a decyl; stearyl, oleyl, ricinoleyl, linoleyl, lauryl, myristyl, capryl, and palmityl radical, or an alkyl radical derived from copra, tallow, or coconut fatty acid. 
     
     
         5 . Method according to  claim 3 , wherein the first diamine is an N-oleyl-1,3 propylene diamine. 
     
     
         6 . Method according to  claim 1 , wherein the second diamine is a polyethoxylated alkyl diamine. 
     
     
         7 . Method according to  claim 6 , wherein the polyethoxylated alkyl diamine is a compound of formula II below: 
       
         
           
           
               
               
           
         
         where: the sum of  x ,  y , and  z  is 2 to 25; and R is a C 3 -C 22  alkyl radical. 
       
     
     
         8 . Method according to  claim 7 , wherein the polyethoxylated alkyl diamine is at least one compound selected from: N,N′,N′-tris(2-hydroxyethyl)-N-tallow-1,3 propylene diamine; and N,N′,N′-polyoxyethylene-N-tallow-1,3 propylene diamine; and preferably the polyethoxylated alkyl diamine is N,N′,N′-polyoxyethylene-N-tallow-1,3 propylene diamine. 
     
     
         9 . Method according to  claim 1 , wherein the composition comprises, by weight, relative to the total weight of the emulsion:
 a) at least 5% to 35% of N-oleyl-1,3-propylene diamine;   b) at least 40% to 90% of N,N′,N′-polyoxyethylene N-tallow propylene diamine; and   c) at least 5% to 40% of a solvent.   
     
     
         10 . Method according to  claim 1 , wherein the solvent is selected from: isopropylbenzene; gasoline; heating oil; and kerosine; and a mixture thereof. 
     
     
         11 . Method according to  claim 1 , so as to obtain a concentration of fatty amines in the treated fuel lying in the range from 0.5 mg/L to 20 mg/L. 
     
     
         12 . Method according to  claim 11 , wherein the concentration of fatty amines in the treated fuel lying in the range from 0.8 mg/L to 15 mg/L. 
     
     
         13 . Method according to  claim 12 , wherein the concentration of fatty amines in the treated fuel lying in the range from 3 mg/L to 12 mg/L. 
     
     
         14 . Method according to  claim 2 , wherein the first diamine satisfies formula I below: 
       
         
           
           
               
               
           
         
       
       where:
   m  is an integer in the range 1 to 8; and 
 R 26 , R 27 , R 28 , and R 29  are independently of one another: hydrogen, a C 1 -C 4  linear or branched alkyl radical, or a C 4 -C 30 , preferably C 8 -C 20 , linear or branched alkyl radical, on condition that at least one from among R 26 , R 27 , R 28 , and R 29  is a C 4 -C 30 , preferably C 8 -C 20 , linear or branched alkyl radical.