# US 4,379,007 A · Catalysts for nitramine propellants

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- Number: US 4,379,007 A
- Document ID: US4379007A
- Status: Granted
- Kind: A
- Application number: 06/244,434
- Filed: 1981-03-16
- Granted: 1983-04-05
- Earliest claimed: 1981-03-16
- Assignees: The United States of America as represented by the Secretary of the Army
- Inventors: Robert A. Fifer; James E. Cole
- Web page: https://patentgrep.com/patent/US4379007A

## CPC

- C06B 43/00: Compositions characterised by explosive or thermic constituents not provided for in groups C06B25/00 - C06B41/00
- C06B 25/34: the compound being a nitrated acyclic, alicyclic or heterocyclic amine
- C06B 45/10: the organic component containing a resin
- C06B 47/10: a component containing free boron, an organic borane or a binary compound of boron, except with oxygen
- C06B: EXPLOSIVES OR THERMIC COMPOSITIONS (blasting F42D); MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES (compounds in general C01, C07 or C08; {demolition agents based on cementitious or like materials C04B41/0009})

## Abstract

This invention relates to novel nitramine propellant compositions for guns nd rockets.

## Claims

### Claim 1

A propellant composition, which comprises a particulate organic nitramine propellant and an effective amount for burn rate acceleration of a metal tetrahydridoborohydride of the following formula: Me(BH.sub.4).sub.x, wherein Me represents an alkali metal or an alkaline earth metal and x is 1 when Me is an alkali metal and x is 2 when Me is an alkaline earth metal.

### Claim 2 (depends on 1)

A propellant composition according to claim 1, wherein the metal tetrahydridoborohydride is present in amount up to about 20% by weight of the nitramine compound.

### Claim 3 (depends on 1)

A propellant composition according to claim 1, which additionally contains a binder.

### Claim 4 (depends on 3)

A propellant composition according to claim 3, wherein a binder is present in amount up to about 50% by weight of the propellant composition.

### Claim 5 (depends on 1)

A propellant composition according to claim 1, wherein the nitramine is at least one of the group consisting of 1,3,5-trinitro-1,3,5-triazacyclohexane and 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane.

### Claim 6 (depends on 1, 5)

A propellant composition according to claim 1 or 5, wherein Me is at least one of the group consisting of lithium, sodium, potassium, beryllium, magnesium and calcium.

### Claim 7 (depends on 1, 5)

A propellant composition according to claim 1 or 5, wherein Me is sodium or magnesium.

### Claim 8

A method of increasing the burn rate of a nitramine propellant, which comprises incorporating therewith an effective amount for burn rate acceleration of a metal tetrahydridoborohydride of the formular Me(BH.sub.4).sub.x, wherein Me represents an alkali metal or an alkaline earth metal and x is 1 when Me is an alkali metal and x is 2 when Me is an alkaline earth metal.

### Claim 9 (depends on 8)

A method according to claim 8, wherein the nitramine is at least one of the group consisting of 1,3,5-trinitro-1,3,5-triazacyclohexane and 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane.

### Claim 10 (depends on 8, 9)

A method according to claim 8 or 9, wherein the metal is at least one of the group consisting of lithium, sodium, potassium, beryllium, magnesium and calcium.

### Claim 11 (depends on 8, 9)

A method according to claim 8 or 9, wherein Me is sodium or magnesium.