High energy explosives

Abstract

A high energy explosive composite which comprises (1) from about 2 to about 30 weight percent of an energetic polymer matrixf a urethane which is the reaction product of (a) a hydroxy-terminated prepolymer of the formula ##STR1## where R is --CH 2 CF(NO 2 ) 2 or --CH 2 C(NO 2 ) 2 CH 3 ; A is --CH 2 CH 2 , --CH 2 OCH 2 --, or --CH 2 OCH 2 OCH 2 --, and n>1, and (b) a polyisocyanate which is used in an amount sufficient to supply from about 0.8:1 to about 1.5:1 isocyanate functional groups for each hydroxy functional group; (2) from about 8 to about 20 weight percent of an energetic plasticizer; and (3) from about 50 to about 90 weight percent of an explosive; wherein the energetic plasticizer and explosives are uniformly dispersed throughout the energetic polymer matrix.

We claim: 
     
       1. An explosive composite comprising: (1) from about 2 to about 30 weight percent of an energetic polymer matrix of a urethane which is the reaction product of (a) a hydroxy-terminated prepolymer of the formula ##STR12##  where R is selected from the group consisting of --CH 2  CF(NO 2 ) 2  and --CH 2  C(NO 2 ) 2  CH 3  --, and A is selected from the group consisting of --CH 2  CH 2 , --CH 2  OCH 2  --, and --CH 2  OCH 2  OCH 2  --, and n>1, and   (b) a polyisocyanate which is used in an amount sufficient to supply from about 0.8:1 to about 1.5:1 isocyanate functional groups for each hydroxy functional group;     (2) from about 8 to about 20 weight percent of an energetic plasticizer; and   (3) from about 50 to about 90 weight percent of an explosive;   wherein the energetic plasticizer and explosive are uniformly dispersed throughout the energetic polymer matrix.   
     
     
       2. The explosive composite of claim 1 wherein R is --CH 2  CF(NO 2 ) 2 . 
     
     
       3. The explosive composite of claim 1 wherein R is --CH 2  C (NO 2 ) 2  CH 3 . 
     
     
       4. The explosive composite of claim 1 wherein A is --CH 2  CH 2  --. 
     
     
       5. The explosive composite of claim 1 wherein A is --CH 2  OCH 2  --. 
     
     
       6. The explosive composite of claim 1 wherein A is --CH 2  OCH 2  OCH 2  --. 
     
     
       7. The explosive composite of claim 1 comprising (a) from 4 to 15 weight percent of energetic polymer matrix, (b) from 11.8 to 15.0 weight percent of energetic plasticizer, and (c) from 70 to 85 weight percent of explosive. 
     
     
       8. The explosive composite of claim 7 comprising (a) from 5.90 to 9.50 weight percent of energetic polymer matrix, (b) from 12.50 to 13.10 weight percent of energetic plasticizer, (c) and from 78.0 to 81.0 weight percent of explosive. 
     
     
       9. The explosive composite of claim 1 wherein the energetic plasticizer is selected from the group consisting of bis(2-fluoro-2,2-dinitroethyl)formal, metriol trinitrate, nitroglycerin, 1,2,4-butanetriol trinitrate, 2,2,2-trinitroethyl 2-nitroethyl ether, and a binary mixture of bis(2,2-dinitropropyl)formal and bis(2,2-dinitropropyl)acetate. 
     
     
       10. The explosive composite of claim 9 wherein the energetic plasticizer is bis(2-fluoro-2,2-dinitroethyl)formal. 
     
     
       11. The explosive composite of claim 1 wherein the explosive is selected from the group consisting of cyclotetramethylenetetranitramine, cyclotrimethylenetrinitramine, 1,3,5-triamino-2,4,6-trinitrobenzene, 2,2',4,4',6,6'-hexanitrostilbene, 3-nitro-1,2,4-triazol-5-one, nitroguanidine, and mixtures thereof.