US4315787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-in-oil emulsion explosive composition
Assignee: NOF Corp
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Filing: 1980-03-31
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Granted: 1982-02-16
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Expires: 2000-03-31
Abstract
Abstract A water-in-oil emulsion explosive composition consisting of ammonium nitrate or a mixture of ammonium nitrate and the other inorganic oxidizer salts, water, oil and/or wax, at least one emulsifier of the group consisting of potassium octadecylsulfonate and sodium N-methyl-N-alkyl(beef tallow)-taurate and at least one of hollow microspheres and bubbles generated from a chemical foaming agent is excellent in the emulsion stability in storage, detonability at low temperature, explosion reactivity and sympathetic detonability.
Inventors
- 👤 Katsuhide Hattori
- 👤 Yoshiaki Fukatsu
- 👤 Masao Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:11
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14; C06B47/145
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A water-in-oil emulsion explosive composition consisting essentially of (a) ammonium nitrate or a mixture of ammonium nitrate and at least one inorganic oxidizer salt, (b) water, (c) at least one member of the group consisting of oil and wax, (d) at least one emulsifier of the group consisting of potassium octadecylsulfonate and sodium N-methyl-N-alkyl(beef tallow)-taurate, (e) at least one of the group consisting of bubbles generated from a chemical foaming agent and hollow microspheres.
Claim 2
Dependent Claim
74 words
A water-in-oil emulsion explosive composition consisting essentially of (a) ammonium nitrate or a mixture of ammonium nitrate and at least one inorganic oxidizer salt, (b) water, (c) at least one member of the group consisting of oil and wax, (d) at least one emulsifier of the group consisting of potassium octadecylsulfonate and sodium N-methyl-N-alkyl(beef tallow)-taurate, (e) at least one of the group consisting of bubbles generated from a chemical foaming agent and hollow microspheres.
Claim 3
Dependent Claim
26 words
The composition of claim 1, wherein said inorganic oxidizer salt is selected from the group consisting of sodium nitrate, calcium nitrate, sodium chlorate and sodium perchlorate.
Claim 4
Dependent Claim
23 words
The composition of claim 1, wherein said oil is a hydrocarbon oil and said wax is paraffin wax, petrotalum wax or microcrystalline wax.
Claim 5
Dependent Claim
15 words
The composition of claim 3, wherein said hydrocarbon oil is light oil or heavy oil.
Claim 6
Dependent Claim
29 words
A water-in-oil emulsion explosive composition as claimed in claim 1, wherein the hollow microsphere is glass hollow microsphere, synthetic resin hollow microsphere, silica hollow microsphere or shirasu hollow microsphere.
Claim 7
Dependent Claim
31 words
A water-in-oil emulsion explosive composition as claimed in claim 1, wherein the chemical foaming agent is a mixture of alkali metal borohydride or sodium nitrite with urea, N,N'-dinitrosopentamethylenetetramine, azodicarbonamide or azobisisobutyronirile.
Claim 8
Dependent Claim
80 words
A water-in-oil emulsion explosive composition as claimed in claim 1, wherein the amount of ammonium nitrate or the mixture of ammonium nitrate and the other inorganic oxidizer salts is 50-90% by weight, that of water is 5-20% by weight, that of the group consisting of oil and wax is 1-7% by weight, that of the emulsifier is 1-5% by weight, that of the hollow microsphere is 1-10% by weight and that of the chemical foaming agent is 0.1-2% by weight.
References Cited (Backward Citations)
US3674578A
Cited
US3995673A
Cited
US4008108A
Cited
US4110134A
Cited
US4111727A
Cited
US4248644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |