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US3765964A
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US
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Water-in-oil emulsion type explosive compositions having strontium-ion detonation catalysts
Assignee: Zeneca Inc
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Filing: 1972-10-06
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Granted: 1973-10-16
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Expires: 1992-10-06
Abstract
Abstract A water-in-oil emulsion explosive composition comprising a carbonaceous fuel, an inorganic oxidizer, a detonation sensitizer, water, an emulsifier, and an occluded gas is further sensitized by the incorporation of strontium compounds which are soluble in the aqueous phase. The sensitized materials can be detonated with a No. 6 cap at diameters as low as 1 inch and with densities as high as 1.25 grams/cc.
Inventors
- 👤 C Wade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:28
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14; C06B47/145
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
13 words
A composition of claim 1 wherein said other inorganic nitrate is sodium nitrate.
Claim 2
Dependent Claim
24 words
A composition of claim 1 wherein said strontium salt is an oxidizing salt of strontium selected from strontium nitrate, strontium chlorate, and strontium perchlorate.
Claim 3
Dependent Claim
17 words
A composition of claim 1 wherein said detonation sensitizer is a strontium chloride, acetate, bromide, or hydroxide.
Claim 4
Dependent Claim
47 words
A composition of claim 1 wherein said oxidizer comprises about 55 percent to about 80 percent ammonium nitrate, about 5 percent to about 15 percent sodium nitrate, about 10 percent to about 35 percent ethylene diamine dinitrate, and about 5 percent to about 10 percent ammonium perchlorate.
Claim 5
Dependent Claim
17 words
A composition of claim 1 wherein up to about 10 percent of an auxiliary fuel is included.
Claim 6
Dependent Claim
13 words
A composition of claim 6 wherein said auxiliary fuel is aluminum or sulfur.
Claim 7
Dependent Claim
19 words
A composition of claim 1 wherein about .25 percent to about 2 percent of a gelling agent is included.
Claim 8
Dependent Claim
12 words
A composition of claim 8 wherein said gelling agent is guar gum.
Claim 9
Dependent Claim
198 words
A cap-sensitive water-in-oil emulsion explosive composition comprising: a. about 2 percent to about 6 percent water-immiscible, emulsifiable fuel which is liquifiable at a temperature between about 110* F. and about 160* F., selected from the group consisting of petrolatum, microcrystalline, paraffin, mineral, animal, and insect waxes, petroleum oils and vegetable oils; b. about 60 percent to about 80 percent of an oxidizer comprising about 20 percent to about 95 percent ammonium nitrate, about 5 percent to about 40 percent of an other inorganic nitrate, up to about 60 percent ethylene diamine dinitrate, up to about 40 percent alkylamine nitrate or alkanolamine nitrate, and up to about 30 percent inorganic chlorate or perchlorate; c. about 15 percent to about 20 percent water; d. about .75 percent to about 1.25 percent emulsifier; e. sufficient occluded gas or gas-entrapping material to give the composition a density of about 1.05 to about 1.25 grams/cc.; and f. about 1 percent to about 10 percent including that present in said other inorganic nitrate of a detonation catalyst sensitizer comprising a water-soluble inorganic salt selected from the group consisting of strontium nitrate, strontium chloride, strontium chlorate, strontium perchlorate, strontium acetate, strontium hydroxide, and strontium bromide.
Claim 10
Dependent Claim
47 words
A composition of claim 10 wherein said oxidizer comprises about 55 percent to about 80 percent ammonium nitrate, about 5 percent to about 15 percent sodium nitrate, about 10 percent to about 35 percent ethylene diamine dinitrate, and about 5 percent to about 10 percent ammonium perchlorate.
Claim 11
Dependent Claim
16 words
A composition of claim 10 wherein said gas is in the form of occluded air bubbles.
Claim 12
Dependent Claim
13 words
A composition of claim 10 wherein said gas is in a gas-entrapping material.
Claim 13
Dependent Claim
16 words
A composition of claim 10 wherein said composition includes up to about 10 percent auxiliary fuel.
Claim 14
Dependent Claim
13 words
A composition of claim 14 wherein said auxiliary fuel is aluminum or sulfur.
Claim 15
Dependent Claim
17 words
A composition of claim 15 wherein about 0.25 - 2 percent of a gelling agent is included.
Claim 16
Dependent Claim
12 words
A composition of claim 16 wherein said gelling agent is guar gum.
Claim 17
Dependent Claim
26 words
A composition of claim 1 wherein said gas-entrapping material is selected from the group consisting of expanded perlite, and hollow microspheres of phenol-formaldehyde, urea-formaldehyde, and glass.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |