# US 4,394,199 A · Explosive emulsion composition

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- Number: US 4,394,199 A
- Document ID: US4394199A
- Status: Granted
- Kind: A
- Application number: 06/299,742
- Filed: 1981-09-08
- Granted: 1983-07-19
- Earliest claimed: 1981-09-08
- Assignees: Agnus Chemical Company
- Inventors: Philip Barnhard, IV; Lyman G. Bahr
- Web page: https://patentgrep.com/patent/US4394199A

## CPC

- C06B 47/145: {Water in oil emulsion type explosives in which a carbonaceous fuel forms the continuous phase}
- 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

An explosive, water-in-oil type emulsion composition comprising an aqueous phase of from 70-90% by weight comprising water 10-30%, oxidizing salt 50-75%, an oil phase 5-20%, an air entrapping material 1-5% and an emulsifying agent 1-5%. Nitropropanes constitute all or a portion of the fuel component.

## Claims

### Claim 1

A water-in-oil emulsion explosive composition consisting essentially of (a) an aqueous phase comprised of a solution of oxidizing salts, (b) an oil phase consisting essentially of a nitroparaffin having three carbon atoms and optionally a hydrocarbon, (c) an emulsifying agent, and (d) at least one sensitizing agent.

### Claim 2 (depends on 1)

The composition of claim 1 wherein the aqueous phase contains 5-35% water and 50-90% oxidizing salt, based on the composition as a whole.

### Claim 3 (depends on 2)

The composition of claim 2 wherein the oxidizing salt is ammonium nitrate or a mixture thereof with sodium nitrate or calcium nitrate.

### Claim 4 (depends on 3)

The composition of claim 3 wherein the oxidizing salt is a mixture of ammonium nitrate 40-55% and sodium nitrate 10-18% based on the total weight of the mixture.

### Claim 5 (depends on 1)

The composition of claim 1 wherein the oil phase consists essentially of, based on the weight of the final emulsion, a nitropropane from about 1.0 wt.% to about 20.0 wt.%, paraffin wax from about 0 wt.% to about 5 wt.%, and a liquid hydrocarbon from about 0 wt.% to about 3 wt.%.

### Claim 6 (depends on 1)

The composition of claim 1 wherein the emulsifying agent is provided by lecithin 1.0-8.0%.

### Claim 7 (depends on 1)

The composition of claim 1 wherein the sensitizing agent is provided by hollow microspheres, 0.5-6%.

### Claim 8

A water-in-oil emulsion explosive composition consisting essentially of (a) from about 70 wt.% to about 90 wt.%, based on the weight of the final emulsion, aqueous phase comprised of a solution of oxidizing salts, (b) from about 5 wt.% to about 20 wt.% oil phase, said oil phase essentially free of gelatinizing agent, comprising from about 1 wt.% to about 20 wt.%, based on the weight of the final emulsion, of a nitroparaffin having three carbon atoms, (c) from about 1 wt.% to about 8 wt.% of an emulsifying agent and (d) from about 0.5 to about 6 wt.% sensitizing agent.

### Claim 9 (depends on 1)

The composition of claim 1 wherein the oil phase consists essentially of, based on the weight of the final emulsion, from about 1.0 wt.% to about 20.0 wt.% of a nitropropane, from about 0 wt.% to about 5 wt.% paraffin wax, and from about 0 wt.% to about 3 wt.% of a liquid hydrocarbon.