Thermosetting solid propellant composition comprising nonvolatile tertiary amine and method for controlling cure rate of the composition

Abstract

Disclosed are a nitrate ester polyether-based thermosetting solid propellant composition comprising a nonvolatile tertiary amine, and a method for controlling a viscosity buildup of the nitrate ester polyether-based thermosetting solid propellant composition characterized by adding a nonvolatile tertiary amine.

1 . A nitrate ester polyether-based thermosetting solid propellant composition, comprising, with respect to the total weight of the composition, 1 to 4% by weight of bismuth subsalicylate as ballistic modifier, and 0.005 to 0.03% by weight of a nonvolatile tertiary amine as a cure rate modifier. 
     
     
         2 . The composition according to  claim 1 , wherein the nonvolatile tertiary amine is selected from the group consisting of 1.4-diazabicyclo[2.2.2]octane, 1,5-diazabicyclo[4.3.0]non-5-ene, 1,8-diazabicyclo[5.4.0]undec-7-ene and any combination thereof. 
     
     
         3 . A method for controlling a viscosity buildup of a nitrate ester polyether-based thermosetting solid propellant composition comprising bismuth subsalicylate as a ballistic modifier, characterized by adding 0.005 to 0.03% by weight, with respect to the total weight of the composition, of nonvolatile tertiary amine selected from the group consisting of 1.4-diazabicyclo[2.2.2]octane, 1,5-diazabicyclo[4.3.0]non-5-ene, 1,8-diazabicyclo[5.4.0]undec-7-ene and any combination thereof.