US4543137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-in-oil emulsion explosive composition
Assignee: NOF Corp
•
Filing: 1984-10-02
•
Granted: 1985-09-24
•
Expires: 2004-10-02
Abstract
Abstract A gas-retaining agent consisting of bubble assemblies, each bubble assembly being one particle consisting of a large number of bubbles agglomerated into the particle, is effective for improving the safety of water-in-oil emulsion explosive compositions against methane and coal dust, for improving the sympathetic detonability of the explosive compositions and for lowering their detonation velocity without deteriorating their strength.
Inventors
- 👤 Koji Edamura
- 👤 Akio Torii
- 👤 Kazuyuki Sato
- 👤 Hiroshi Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:56
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14; C06B47/145; C06B23/00; C06B23/002; C06B23/003
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
In a water-in-oil emulsion explosive composition comprising a continuous phase consisting of a carbonaceous fuel component; a disperse phase consisting of an aqueous solution of inorganic oxidizer salt; an emulsifier and a gas-retaining agent, the improvement comprising the explosive composition containing, as the gas-retaining agent, 0.05-40% by weight based on the total amount of explosive composition of bubble assemblies, each bubble assembly being one particle consisting of a large number of bubbles agglomerated into the particle.
Claim 2
Dependent Claim
76 words
In a water-in-oil emulsion explosive composition comprising a continuous phase consisting of a carbonaceous fuel component; a disperse phase consisting of an aqueous solution of inorganic oxidizer salt; an emulsifier and a gas-retaining agent, the improvement comprising the explosive composition containing, as the gas-retaining agent, 0.05-40% by weight based on the total amount of explosive composition of bubble assemblies, each bubble assembly being one particle consisting of a large number of bubbles agglomerated into the particle.
Claim 3
Dependent Claim
35 words
A water-in-oil emulsion explosive composition according to claim 1, wherein the gas-retaining agent consists of organic bubble assemblies, each bubble assembly being one particle consisting of a large number of bubbles agglomerated into the particle.
Claim 4
Dependent Claim
47 words
A water-in-oil emulsion explosive composition according to claim 2, wherein the gas-retaining agent consists of chip-shaped or globular organic bubble assemblies formed of at least one member selected from the group consisting of foamed polystyrene, foamed polyethylene, foamed polypropylene, foamed polyurethane, foamed polyvinyl chloride and foamed rubber.
Claim 5
Dependent Claim
25 words
A water-in-oil emulsion explosive composition according to claim 3, wherein the gas-retaining agent consists of prefoamed particles of foamable polystyrene or/and chips of foamed polystyrene.
Claim 6
Dependent Claim
39 words
A water-in-oil emulsion explosive composition according to claim 1, wherein the explosive composition further contains at least one sensitizer selected from the group consisting of monomethylamine nitrate, hydrazine nitrate, ethanolamine nitrate, ethylenediamine dinitrate, urea nitrate, trinitrotoluene and aluminum powder.
Claim 7
Dependent Claim
32 words
A water-in-oil emulsion explosive composition according to claim 5, wherein the sensitizer is at least one member selected from the group consisting of monomethylamine nitrate, hydrazine nitrate, ethanolamine nitrate and ethylenediamine dinitrate.
Claim 8
Dependent Claim
15 words
A water-in-oil emulsion explosive composition according to claim 6, wherein the sensitizer is hydrazine nitrate.
Claim 9
Dependent Claim
31 words
A water-in-oil emulsion explosive composition according to claim 1, wherein the explosive composition further contains, as a flame coolant, at least one of halogenides of alkali metal and alkaline earth metal.
Claim 10
Dependent Claim
16 words
A water-in-oil emulsion explosive composition according to claim 8, wherein the flame coolant is sodium chloride.
Claim 11
Dependent Claim
29 words
A water-in-oil emulsion explosive composition according to claim 9, wherein the flame coolant is finely divided sodium chloride having a particle size smaller than the 30 mesh sieve opening.
Claim 12
Dependent Claim
57 words
A water-in-oil emulsion explosive composition according to claim 1, comprising 1-10% by weight of a carbonaceous fuel, 0.1-10% by weight of an emulsifier, 5-90% by weight of an inorganic oxidizer salt, 3-30% by weight of water, 0.05-40% by weight of a gas-retaining agent, 0-80% by weight of a sensitizer and 0-50% by weight of a flame coolant.
Claim 13
Dependent Claim
117 words
A water-in-oil emulsion explosive composition according to claim 11, comprising 1-10% by weight of a carbonaceous fuel, 0.1-10% by weight of an emulsifier, 5-90% by weight of an inorganic oxidizer salt, 3-30% by weight of water, 1-40% by weight of at least one sensitizer selected from the group consisting of monomethylamine nitrate, hydrazine nitrate, ethanolamine nitrate and ethylenediamine dinitrate, 1-40% by weight of sodium chloride as a flame coolant, and 0.1-15% by weight of a gas-retaining agent consisting of chips and/or globes having a particle size of 0.1-5 mm of organic bubble assemblies obtained from at least one member selected from the group consisting of foamed polystyrene, foamed polyethylene, foamed polypropylene, foamed polyurethane and foamed polyvinyl chloride.
References Cited (Backward Citations)
US4110134A
Cited
US4111727A
Cited
US4308081A
Cited
US4231821A
Cited
US4294633A
Cited
US4287010A
Cited
US4343663A
Cited
US4371408A
Cited
US4500370A
Cited
US4474628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |