# US 4,398,976 A · Water-in-oil emulsion explosive composition

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- Number: US 4,398,976 A
- Document ID: US4398976A
- Status: Granted
- Kind: A
- Application number: 06/333,896
- Filed: 1981-12-23
- Granted: 1983-08-16
- Earliest claimed: 1981-01-12
- Assignees: Nippon Oil and Fats Co., Ltd.
- Inventors: Katsuhide Hattori; Yoshiaki Fukatsu; Akio Torii
- Web page: https://patentgrep.com/patent/US4398976A

## 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

A water-in-oil emulsion explosive composition having excellent storage stability, low-temperature detonability and explosion reactivity is disclosed, which comprises (a) a disperse phase formed of an inorganic nitrate consisting mainly of ammonium nitrate, (b) a continuous phase formed of an oil, (c) an emulsifier, (d) hollow microspheres and/or a chemical foaming agent, and (e) an inorganic chlorate.

## Claims

### Claim 1

A water-in-oil emulsion explosive composition comprising (a) a disperse phase formed of an aqueous solution of inorganic nitrate consisting mainly of ammonium nitrate, (b) a continuous phase formed of an oil, (c) an emulsifier, (d) hollow microspheres and/or a chemical foaming agent, and (e) 2-15% by weight of an inorganic chlorate sensitizer.

### Claim 2 (depends on 1)

A composition according to claim 1 wherein said inorganic chlorate sensitizer is selected from the group consisting of alkali metal salts and alkaline earth metal salts of inorganic chloric acid.

### Claim 3

A water-in-oil emulsion explosive composition consisting essentially of (a) a disperse phase formed of an aqueous solution of inorganic nitrate consisting mainly of ammonium nitrate, (b) a continuous phase formed of an oil, (c) an emulsifier, (d) hollow microspheres and/or a chemical foaming agent, and (e) 2-15% by weight of an inorganic chlorate sensitizer.

### Claim 4

A water-in-oil emulsion explosive composition comprising (a) a disperse phase formed of an aqueous solution of inorganic nitrate consisting mainly of ammonium nitrate, (b) a continuous phase formed of an oil, (c) an emulsifier, (d) hollow microspheres and/or a chemical foaming agent, and (e) 2-15% by weight of an inorganic chlorate as the only sensitizer.