IP Library › Granted Patent US 12692207
Granted Patent B1
US 12692207 · App. 18/213,322 · Granted Jul 28, 2026

Encapsulated energetic materials and methods of making encapsulated energetic materials

Inventors: David Bird (Newton, NJ); Elbert Caravaca (Budd Lake, NJ); Nathan Peabody (Weehawken, NJ)
Assignee: The United States of America as Represented by the Secretary of the Army
C06B45/24C06B21/0025C06B21/0083
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Quick Facts
Patent No.
US 12692207
App. No.
18/213,322
Granted
Jul 28, 2026
Kind
B1
Abstract

Embodiments of the current disclosure include energetic microcapsules, comprising: a core comprising a first energetic material; and a shell comprising a second energetic material encapsulating the core, wherein the first energetic material is different from the second energetic material, and wherein the core is 15% to 70% by weight of the energetic microcapsule and the shell is 30% to 85% by weight of the energetic microcapsule. Embodiments of the current disclosure further include methods of forming an energetic microcapsule, comprising: mixing an organic phase monomer and an aqueous phase monomer to form an emulsion; curing the emulsion at a predetermined temperature to form the energetic microcapsule; and coating the energetic microcapsule with a thermoplastic coating.

Claims (11)

1 . A method of forming an energetic microcapsule, comprising:

mixing an organic phase monomer and an aqueous phase monomer to form an emulsion;

curing the emulsion at a predetermined temperature to form the energetic microcapsule; and

coating the energetic microcapsule with a thermoplastic coating.

2 . The method of claim 1 , wherein the organic phase monomer is one of methylene diphenyl diisocyanate (MDI), polyol modified MDI, or toluene diisocyanate.

3 . The method of claim 1 , wherein the aqueous phase monomer is one of hexamethylene diamine, methyl methacrylate, or N-isopropylacrylamide.

4 . The method of claim 1 , wherein the coating is a polymer having a melting temperature greater than 65 degrees Celsius and an exotherm peak that is 50 degrees Celsius or more below the decomposition temperature of the energetic material.

5 . The method of claim 1 , wherein the coating is polyvinylpyrrilidone.

6 . The method of claim 1 , wherein the energetic microcapsule comprises: a core comprising a first energetic material; and a shell comprising a second energetic material encapsulating the core, wherein the first energetic material is different from the second energetic material, and wherein the core is 15% to 70% by weight of the energetic microcapsule and the shell is 30% to 85% by weight of the energetic microcapsule.

7 . The method of claim 6 , wherein the first energetic material is a nitrate ester.

8 . The method of claim 6 , wherein the second energetic material is a glycidyl azide polymer.