Mixtures suitable as fuel additives

Abstract

Mixtures of at least one amine, polyamine or alkanolamine and at least one polyetheramine and their use as additives for gasoline engine fuels.

We claim:  
     
         1 . A mixture suitable as a fuel additive and comprising essentially 
 A) at least one amine, polyamine or alkanolamine, each of which carries a hydrocarbon radical having an average molecular weight of from 500 to 10,000, prepared by hydroformylation of a polyolefin and amination of the resulting aldehyde and alcohol mixture under hydrogenating conditions, and    B) at least one polyetheramine of the formula I                        where    m is 1 or 2    n is from 1 to 100,    R 1  is a monovalent C 2 -C 35 -hydrocarbon radical when m is 1 and    a divalent C 2 -C 30 -hydrocarbon radical when m is 2, and    R 2  and R 3  are each hydrogen, C 1 -C 12 -alkyl, C 5 -C 7 -cycloalkyl, C 6 -C 10 -aryl, a polyalkyleneamine radical or alkanolamine radical having from 1 to 5 nitrogen atoms, where the radicals may be identical or different and, together with the nitrogen atom to which they are bonded, may form a five-membered or six-membered ring in which further hetero atoms may be incorporated, and    D is C 2 -C 5 -alkylene.      
     
     
         2 . A mixture as claimed in  claim 1 , wherein the hydrocarbon radical of the component A has an average molecular weight of from 700 to 1,500.  
     
     
         3 . A mixture as claimed in  claim 1  or  2 , wherein the hydrocarbon radical of the component A is a polyisobutyl radical.  
     
     
         4 . A mixture as claimed in any of  claims 1  to  3 , wherein, when m is 1, the radical R 1  of component B is phenyl or C 1 -C 20 -alkyl-substituted phenyl.  
     
     
         5 . A mixture as claimed in any of  claims 1  to  4 , wherein the radical D of component B is propylene or butylene.  
     
     
         6 . Use of a mixture as claimed in any of  claims 1  to  5  as an additive for fuels for gasoline engines.  
     
     
         7 . A fuel for gasoline engines, containing small amounts of 
 A) at least one amine, polyamine or alkanolamine, each of which carries a hydrocarbon radical having an average molecular weight of from 500 to 10,000, prepared by hydroformylation of a polyolefin and amination of the resulting aldehyde and alcohol mixture under hydrogenating conditions, and    B) at least one polyetheramine of the formula I                        where    m is 1 or 2    n is from 1 to 100,    R 1  is a monovalent C 2 -C 35 -hydrocarbon radical when m is 1 and    a divalent C 2 -C 30 -hydrocarbon radical when m is 2, and    R 2  and R 3  are each hydrogen, C 1 -C 12 -alkyl, C 5 -C 7 -cycloalkyl, C 6 -C 10 -aryl, a polyalkyleneamine radical or alkanolamine radical having from 1 to 5 nitrogen atoms, where the radicals may be identical or different and, together with the nitrogen atom to which they are bonded, may form a five-membered or six-membered ring in which further hetero atoms may be incorporated, and    D is C 2 -C 5 -alkylene.