Patent US4132574A successfully refreshed from Google Patents.
US4132574A
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US
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Superfine PETN thin layer slurry explosive
Assignee: Individual
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Filing: 1977-03-14
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Granted: 1979-01-02
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Expires: 1997-03-14
Abstract
Abstract A cap-sensitive slurry explosive capable of propagating a high order detonation in thin layers and which has a high degree of safety for a cap-sensitive explosive. The slurry consists of a super-fine grained explosive, suspended in an energetic, but non-self-explosive liquid matrix and contains no liquid explosive ingredient. The slurry resists dispersion in a variety of liquids including water and crude oil. In the preferred embodiments the slurries include penetaerythritol tetranitrate (PETN) in super fine particles, having an average particle size of about 6.5 microns.
Inventors
- 👤 Charles D. Forrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:05
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/111
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
134 words
An improved slurry explosive able to propagate in very thin layers comprising of, by weight: A. approximately 15% to 45% by weight of sensitized superfine particle penetaerythritol tetranitrate (PETN) said sensitized particles having at least 1000 interstitial voids of apparent diameter of approximately 0.18 to 0.2 micron uniformly distributed in an average diameter particle of about 6.5 microns; and B. approximately 45% to 27% by weight of a material selected from the group consisting of ammonium nitrate, potassium, barium, and sodium nitrate; and C. approximately 10% by weight of a material selected from the group consisting of diethylene glycol, formamide, dimethyl formamide, glycols and alcohols; and D. approximately 0.5% to 0.7% of a material selected from the group consisting of guar gum and polyacrylamide; and E. a cross-linking agent; and F. the balance water.
Claim 2
Dependent Claim
134 words
An improved slurry explosive able to propagate in very thin layers comprising of, by weight: A. approximately 15% to 45% by weight of sensitized superfine particle penetaerythritol tetranitrate (PETN) said sensitized particles having at least 1000 interstitial voids of apparent diameter of approximately 0.18 to 0.2 micron uniformly distributed in an average diameter particle of about 6.5 microns; and B. approximately 45% to 27% by weight of a material selected from the group consisting of ammonium nitrate, potassium, barium, and sodium nitrate; and C. approximately 10% by weight of a material selected from the group consisting of diethylene glycol, formamide, dimethyl formamide, glycols and alcohols; and D. approximately 0.5% to 0.7% of a material selected from the group consisting of guar gum and polyacrylamide; and E. a cross-linking agent; and F. the balance water.
Claim 3
Dependent Claim
38 words
The improved slurry of claim 1, wherein said sensitized particles have at least about 2000 interstitial voids having an apparent diameter of approximately 0.18 to 0.2 microns uniformly distributed in an average diameter particle of about 6.5 microns.
Claim 4
Dependent Claim
14 words
The improved slurry explosive of claim 1, wherein said voids define a gaseous phase.
Claim 5
Dependent Claim
14 words
The improved slurry explosive of claim 1, wherein said voids define a liquid phase.
Claim 6
Dependent Claim
42 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight: A. 45% of said sensitized superfine penetaerythritol tetranitrate (PETN); and B. 27% of said material selected from the group consisting of ammomium nitrate, potassium, barium, and sodium nitrate.
Claim 7
Dependent Claim
42 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight; A. 35% of said sensitized superfine penetaerythritol tetranitrate (PETN); and B. 33% of said material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate.
Claim 8
Dependent Claim
42 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight: A. 20% of said sensitized superfine penetaerythritol tetranitrate (PETN); and B. 42% of said material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate.
Claim 9
Dependent Claim
41 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight; A. 15% of said sensitized penetaerythritol tetranitrate (PETN); and B. 45% of said material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate.
Claim 10
Dependent Claim
34 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight, five drops per 100 grams of slurry of a 50% solution of titanium and antimonium lactate as said cross-linking agent.
Claim 11
Dependent Claim
106 words
An improved slurry explosive able to proponate in very thin layers comprising, by weight: A. approximately 15% to 45% of sensitized superfine particle penetaerythritol tetranitrate (PETN), said sensitized particles having at least 1000 intestitual voids of apparent diameter of approximately 0.18 to 0.2 micron uniformly distributed in an averge diameter particle of about 6.5 microns; and B. approximately 10% by weight of a material selected from the group consisting of diethylene glycol, formamide, glycols and alcohols; and C. approximately 0.5% to 0.7% of a material selected from the group consisting of guar gum and polyacrylamide; and D. a cross linking agent; and E. the balance water.
Claim 12
Dependent Claim
106 words
An improved slurry explosive able to proponate in very thin layers comprising, by weight: A. approximately 15% to 45% of sensitized superfine particle penetaerythritol tetranitrate (PETN), said sensitized particles having at least 1000 intestitual voids of apparent diameter of approximately 0.18 to 0.2 micron uniformly distributed in an averge diameter particle of about 6.5 microns; and B. approximately 10% by weight of a material selected from the group consisting of diethylene glycol, formamide, glycols and alcohols; and C. approximately 0.5% to 0.7% of a material selected from the group consisting of guar gum and polyacrylamide; and D. a cross linking agent; and E. the balance water.
Claim 13
Dependent Claim
27 words
The improved slurry of claim 10 where in the material in group (b) is diethylene glycol in a percent, by weight, of the composition of approximately 25%.
References Cited (Backward Citations)
US3912560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |