Liquid propellant

Abstract

The present invention addresses the problem of providing a liquid propellant which has low toxicity, is easy to handle, and has excellent specific impulse. The present invention provides a liquid propellant characterized by comprising at least a dinitramide derivative represented by general formula (1) and an amine nitrate represented by general formula (2).

1 . A liquid propellant, comprising at least:
 a dinitramide derivative represented by the following general formula (1)   
       
         
           
           
               
               
           
         
       
       (where R 1 -R 4 , which may be the same or different, are hydrogen atom or alkyl group having 1-8 carbon atoms); and
 an amine nitrate represented by the following general formula (2) 
 
       
         
           
           
               
               
           
         
       
       (where R 5  is an alkyl group having 1-8 carbon atoms, and R 6 -R 7 , which may be the same or different, are hydrogen atom or alkyl group having 1-8 carbon atoms). 
     
     
         2 . The liquid propellant of  claim 1 , wherein
 the dinitramide derivative is ammonium dinitramide represented by the following formula (A)   
       
         
           
           
               
               
           
         
       
     
     
         3 . The liquid propellant of  claim 1 , wherein
 the total amount of the dinitramide derivative and the amine nitrate is 80 wt % or more.   
     
     
         4 . The liquid propellant of  claim 1 , wherein
 the amine nitrate is monoalkylamine nitrate.   
     
     
         5 . The liquid propellant of  claim 1 , further comprising:
 a urea derivative represented by the following general formula (3)   
       
         
           
           
               
               
           
         
       
       (where R 8 -R 11 , which may be the same or different, are hydrogen atom, alkyl group having 1-6 carbon atoms, alkenyl group having 2-6 carbon atoms, aryl group having 6-10 carbon atoms, alkylamino group having 1-6 carbon atoms, or dialkylamino group having 2-6 carbon atoms, or optionally two or more of R 8 -R 11  are bonded together to form a five- or six-membered ring that may have halogen groups). 
     
     
         6 . The liquid propellant of  claim 5 , wherein
 the amount of urea derivative is 5-20 wt %.   
     
     
         7 . The liquid propellant of  claim 1 , wherein
 the weight ratio of the dinitramide derivative to the amine nitrate is 4/6 to 7/3.   
     
     
         8 . The liquid propellant of  claim 1 , wherein
 the liquid propellant is substantially free of hydrazine.   
     
     
         9 . The liquid propellant of  claim 1 , wherein
 R 1 -R 4  and R 6 -R 7  are all hydrogen atoms.   
     
     
         10 . The liquid propellant of  claim 3 , wherein
 R 1 -R 4  and R 6 -R 7  are all hydrogen atoms   
     
     
         11 . The liquid propellant of  claim 3 , wherein
 the weight ratio of the dinitramide derivative to the amine nitrate is 4/6 to 7/3.   
     
     
         12 . The liquid propellant of  claim 11 , wherein
 R 1 -R 4  and R 6 -R 7  are all hydrogen atoms.   
     
     
         13 . The liquid propellant of  claim 5 , wherein
 the total amount of the dinitramide derivative and the amine nitrate is 80 wt % or more, and R 1 -R 4  and R 6 -R 7  are all hydrogen atoms.   
     
     
         14 . The liquid propellant of  claim 13 , wherein
 the liquid propellant is substantially free of hydrazine.