Hypergolic composition

Abstract

The present invention provides kits and compositions for e.g., hypergolic ignition of rocket propellant. The disclosed kits and the compositions comprise inter alia a fuel, a gelling agent, and an ignition agent; wherein the ignition agent is stably dissolved within the fuel.

1 . A composition comprising a fuel, an ignition agent, and a gelling agent; wherein:
 said ignition agent is substantially dissolved within the fuel and a gelling agent;   said gelling agent is at a concentration ranging from 2% to 8%, by total weight of said fuel;   the fuel is a gelled fuel; and the composition is substantially devoid of a particulate matter of said ignition agent, wherein said gelled fuel is characterized by a viscosity being at least 10 times greater than a viscosity of the same fuel without the gelling agent, when measured at 25° C.   
     
     
         2 . The composition of  claim 1 , wherein said ignition agent is at a concentration ranging from 4% to 10%, by total weight of said fuel. 
     
     
         3 . (canceled) 
     
     
         4 . The composition of  claim 1 , wherein said composition is a fluid and is characterized by a viscosity ranging from 10 3  to 10 5  Pa*s, when measured at 25° C. 
     
     
         5 . The composition of  claim 1 , wherein the ignition agent comprises a metal hydride. 
     
     
         6 . The composition of  claim 1 , wherein said fuel comprises a glycol ether. 
     
     
         7 . The composition of  claim 6 , wherein said glycol ether comprises any one of a diglyme, a triglyme, a tetraglyme or a combination thereof; and wherein said metal hydride is selected from the group consisting of: sodium borohydride, potassium borohydride, lithium borohydride, lithium aluminum hydride, and a combination thereof. 
     
     
         8 . The composition of  claim 1 , wherein said gelling agent comprises one or more materials selected from a metal oxide nanoparticles, a long chain fatty acid salt, polyacrylate, paraffin, and an alkylated cellulose. 
     
     
         9 . The composition of  claim 1 , further comprising an oxidizer, said oxidizer comprises one or more materials selected from the group consisting of hydrogen peroxide, cerium, chlorite, bromite, fluorite, chlorate, bromate, fluorate, hyporchlorite, oxygen, nitrous oxide, nitrous acid, nitric acid, and perchloric acid including any salt or any combination thereof. 
     
     
         10 . The composition of  claim 9 , wherein said composition is a hypergolic propellant composition, and wherein a weight per weight (w/w) ratio between said fuel and said oxidizer within said composition is at least 1:3. 
     
     
         11 . (canceled) 
     
     
         12 . The composition of  claim 1 , in a form of a fluid. 
     
     
         13 . (canceled) 
     
     
         14 . (canceled) 
     
     
         15 . (canceled) 
     
     
         16 . A kit of parts comprising:
 (a) a first composition comprising a fuel, an ignition agent, and a gelling agent, said gelling agent is at a concentration ranging from 2% to 8%, by total weight of said fuel; the fuel is a gelled fuel; and   (b) a second composition comprising an oxidizer, and wherein upon mixing the first composition with a predetermined amount of the second composition a hypergolic propellant is obtained.   
     
     
         17 . The kit of parts of  claim 16 , wherein said first composition and the second composition are stored in separate containers. 
     
     
         18 . The kit of parts of  claim 16 , wherein said first composition is substantially devoid of a particulate matter of said ignition agent upon storage at temperature ranging from −40 to +60° C. 
     
     
         19 . The kit of parts of  claim 16 , wherein the predetermined amount comprises a w/w ratio of the oxidizer and the fuel between 5:1 and 3:1. 
     
     
         20 . The kit of parts of  claim 16 , wherein said ignition agent is at a concentration ranging from 4% to 10%, by total weight of said fuel. 
     
     
         21 . The kit of parts of  claim 16 , wherein the ignition agent comprises a metal hydride and said fuel comprises a glycol ether. 
     
     
         22 . The kit of parts of  claim 16 , wherein the first composition and the second composition are fluids. 
     
     
         23 . The kit of parts of  claim 16 , wherein the kit further comprises a means for contacting said first composition with said the second composition. 
     
     
         24 . (canceled) 
     
     
         25 . (canceled) 
     
     
         26 . (canceled) 
     
     
         27 . A method for obtaining a hypergolic composition, comprising mixing a predetermined amount of said first composition and said second composition of the kit of  claim 16 ; thereby obtaining said hypergolic composition. 
     
     
         28 . The method of  claim 27 , wherein said predetermined amount comprises a w/w ratio of said fuel to said oxidizer being between 1:3 and 1:5.