Bonding agents for nitrogen-containing oxidizers

Patent metadata

Field	Value
Publication number	US-2016046539-A1
Application number	US-201414268450-A
Country	US
Kind code	A1
Filing date	May 2, 2014
Priority date	May 2, 2014
Publication date	Feb 18, 2016
Grant date	—

Abstract

Disclosed herein are energetic compositions and methods of making thereof. A composition includes particles of a nitrogen-containing oxidizer dispersed in a polymeric binder and a bonding agent bonded to a surface of at least a portion the particles. The bonding agent disclosed is a Lewis acid.

First claim

1 . A composition comprising:
particles of a nitrogen-containing oxidizer dispersed in a polymeric binder; and a bonding agent bonded to a surface of at least a portion the particles; wherein the bonding agent is a Lewis acid.

2 . The composition of claim 1 , wherein the Lewis acid is a boron-containing monomer or a boron-containing polymer.

3 . The composition of claim 1 , wherein the polymeric binder is a hydroxyl terminated polybutadiene, a glycidyl azide polymer, a polyether, a polyester, or any combination thereof.

4 . The composition of claim 1 , wherein the nitrogen-containing oxidizer is cyclotetramethylenetetranitramine, cyclotrimethylenetrinitramine, ammonium nitrate, ammonium dinitramide, nitrogen tetroxide, or any combination thereof.

5 . The composition of claim 1 , wherein the bonding agent is bonded to the nitrogen-containing oxidizer with a chemical bond or an adhesive bond.

6 . The composition of claim 1 , wherein the Lewis acid is a compound comprising metal cations.

7 . The composition of claim 1 , wherein the Lewis acid is a boron-containing monomer having the following structure:

wherein x, y, and z are each independently a hydrogen, an acrylate group, an acyl halide group, an amide group, an amine group, a carboxylate group, a carboxylate thiol group, an ester group, an ether group, a hydroxamic acid group, a hydroxyl group, a nitrate group, a nitrile group, a phosphate group, a phosphine group, a phosphonic acid group, a silane group, a sulfate group, a sulfide group, a sulfite group, a thiolate group, an alkane group, an alkene group, an alkyne group, an aryl group, an azide group, an acetal group, an aldehyde group, a diene group, a 3-membered ring group, 4-membered ring group, a 5-membered ring group, or a 6-membered ring group, or any combination thereof.

8 . The propellant composition of claim 1 , wherein the Lewis acid is a boron-containing polymer having the following structure:

wherein n is an integer from 1 to 20, and x and y are each independently a hydrogen, an acrylate group, an acyl halide group, an amide group, an amine group, a carboxylate group, a carboxylate thiol group, an ester group, an ether group, a hydroxamic acid group, a hydroxyl group, a methacrylate group, a nitrate group, a nitrile group, a phosphate group, a phosphine group, a phosphonic acid group, a silane group, a sulfate group, a sulfide group, a sulfite group, a thiolate group, an alkane group, an alkene group, an alkyne group, an azide group, an acetal group, an aldehyde group, a diene group, an anhydride group, a 3-membered ring group, 4-membered ring group, a 5-membered ring group, or a 6-membered ring group, or any combination thereof.

9 . A composition comprising:
nitrogen-containing oxidizer particles dispersed in a polymeric binder; and a Lewis acid bonding agent bonded to at least a portion of a surface the nitrogen-containing oxidizer particles to form an encapsulating film.

10 . The composition of claim 9 , wherein the Lewis acid bonding agent is a boron-containing copolymer having the following structure:

wherein n is an integer from 1 to 20, m is an integer from 1 to 20, and x, y, and z are each independently a hydrogen, an acrylate group, an acyl halide group, an amide group, an amine group, a carboxylate group, a carboxylate thiol group, an ester group, an ether group, a hydroxamic acid group, a hydroxyl group, a methacrylate group, a nitrate group, a nitrile group, a phosphate group, a phosphine group, a phosphonic acid group, a silane group, a sulfate group, a sulfide group, a sulfite group, a thiolate group, an alkane group, an alkene group, an alkyne group, an azide group, an acetal group, an aldehyde group, a diene group, an anhydride group, a 3-membered ring group, 4-membered ring group, a 5-membered ring group, or a 6-membered ring group, or any combination thereof.

11 . The composition of claim 9 , wherein the nitrogen-containing oxidizer particles have an average diameter in a range between about 50 and about 200 microns.

12 . The composition of claim 9 , further comprising a polyisocyanate.

13 . The composition of claim 9 , wherein the Lewis acid is an enone compound.

14 . The composition of claim 13 , wherein the enone compound is methyl vinyl ketone.

15 . A method of making a composition, the method comprising:
coating at least a portion of a surface of nitrogen-containing oxidizer particles with a Lewis acid bonding agent to form a coated nitrogen-containing oxidizer; and mixing the coated nitrogen-containing oxidizer with a polymeric binder to form the composition.

16 . The method of claim 15 , wherein the Lewis acid bonding agent is a boron-containing monomer having the following structure:

wherein x, y, and z are each independently a hydrogen, an acrylate group, an acyl halide group, an amide group, an amine group, a carboxylate group, a carboxylate thiol group, an ester group, an ether group, a hydroxamic acid group, a hydroxyl group, a methacrylate group, a nitrate group, a nitrile group, a phosphate group, a phosphine group, a phosphonic acid group, a silane group, a sulfate group, a sulfide group, a sulfite group, a thiolate group, an alkane group, an alkene group, an alkyne group, an azide group, an acetal group, an aldehyde group, a diene group, an anhydride group, a 3-membered ring group, 4-membered ring group, a 5-membered ring group, or a 6-membered ring group, or any combination thereof.

17 . The method of claim 15 , wherein the Lewis acid is a boron-containing polymer having the following structure:

wherein n is an integer from 1 to 20, and x and y are each independently a hydrogen, an acrylate group, an acyl halide group, an amide group, an amine group, a carboxylate group, a carboxylate thiol group, an ester group, an ether group, a hydroxamic acid group, a hydroxyl group, a methacrylate group, a nitrate group, a nitrile group, a phosphate group, a phosphine group, a phosphonic acid group, a silane group, a sulfate group, a sulfide group, a sulfite group, a thiolate group, an alkane group, an alkene group, an alkyne group, an azide group, an acetal group, an aldehyde group, a diene group, an anhydride group, a 3-membered ring group, 4-membered ring group, a 5-membered ring group, or a 6-membered ring group, or any combination thereof.

18 . The method of claim 15 , wherein the wherein the nitrogen-containing oxidizer particles are cyclotetramethylenetetranitramine, cyclotrimethylenetrinitramine, ammonium nitrate, ammonium dinitramide, nitrogen tetroxide, or any combination thereof.

19 . The method of claim 15 , wherein the composition is a propellant or an explosive.

20 . The method of claim 15 , further comprising curing the composition.

Assignees

• Raytheon Co

Inventors

• Deppert Thomas M
• Shanholtz Carl
• Smith David R

Classifications

• C06B45/10 Primary

  the organic component containing a resin · CPC title

• C06B45/24 Primary

  the compound being an organic explosive or an organic thermic component · CPC title

• C06B31/28

  the salt being ammonium nitrate · CPC title

• C06B25/34

  the compound being a nitrated acyclic, alicyclic or heterocyclic amine · CPC title

• C06B21/00

  Apparatus or methods for working-up explosives, e.g. forming, cutting, drying · CPC title