Water-in-oil emulsion explosive composition
AssigneeNippon Oil and Fats Co., Ltd.
InventorsFumio Takeuchi, Masao Takahashi
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Abstract
A water-in-oil emulsion explosive composition having a remarkably improved storage stability in its initiation sensitivity in small diameter cartridges and at low temperatures is disclosed. The explosive composition comprises a disperse phase formed of an aqueous oxidizer solution consisting of (a) ammonium nitrate or a mixture of ammonium nitrate and another oxidizer salt, (b) water and (c) a specifically limited weak acid salt or condensed phosphate; a continuous phase consisting of (d) fuel oil and/or wax; (e) an emulsifier; and (f) hollow microspheres or microbubbles.
Claims6
A water-in-oil emulsion explosive composition comprising a disperse phase formed of an aqueous oxidizer solution consisting of (a) an inorganic oxidizer salt selected from the group consisting of ammonium nitrate, and a mixture of ammonium nitrate with at least one of sodium nitrate and calcium nitrate, (b) water and (c) at least one member selected from lithium, sodium, potassium, calcium and ammonium salts of weak acid and condensed phosphoric acid;
- a continuous phase formed of a combustible material consisting of (d) fuel oil and/or wax;
- (e) an emulsifier;
- and (f) hollow microspheres or microbubbles.
A water-in-oil emulsion explosive composition, comprising 40-90% by weight of an inorganic oxidizer salt selected from the group consisting of ammonium nitrate, and a mixture of ammonium nitrate with at least one of sodium nitrate and calcium nitrate, 7.45-28% by weight of water, 0.05-15% by weight of at least one of lithium, sodium, potassium, calcium and ammonium salts of weak acid and condensed phosphoric acid, 1-10% by weight of at least one of fuel oil and wax, 0.5-5% by weight of an emulsifier, and hollow microspheres or microbubbles in an amount sufficient for adjusting the density of the emulsion explosive composition to 0.80-1.35.
Dependencies are inferred from the claim text.