WO1993004021A1 - Low-flammability cap-sensitive flexible explosive composition - Google Patents
Low-flammability cap-sensitive flexible explosive composition Download PDFInfo
- Publication number
- WO1993004021A1 WO1993004021A1 PCT/US1991/006747 US9106747W WO9304021A1 WO 1993004021 A1 WO1993004021 A1 WO 1993004021A1 US 9106747 W US9106747 W US 9106747W WO 9304021 A1 WO9304021 A1 WO 9304021A1
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- WIPO (PCT)
- Prior art keywords
- composition
- explosive
- flame retardant
- retardant material
- cap
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
- C06B45/04—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive
- C06B45/06—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component
- C06B45/10—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component the organic component containing a resin
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
- C06B45/12—Compositions or products which are defined by structure or arrangement of component of product having contiguous layers or zones
Definitions
- This invention relates to a flexible explosive composition of reduced flammability. More particularly, the invention relates to a cap-sensitive flexible explosive composition containing a finely divided, cap-sensitive explosive admixed in a flame resistant polymeric binder system which includes a compatible flame retardant material. Such compositions are useful in applications which require self-supporting units rather than loose particles in environments in which the units may be subjected to ignition temperatures.
- a cap-sensitive flexible explosive composition of reduced flammability comprising a. finely divided, cap-sensitive explosive and a compatible flame retardant material in a flame resistant polymeric binder system.
- the compositions exhibit markedly reduced flammability both in terms of ignition resistance and burning rate.
- the cap-sensitive explosive and flame retardant material are admixed with the polymeric binder.
- the polymeric binder is chosen from flame resistant polymers and copolymers which provide a flexible explosive sheet when compounded with additional ingredients as described herein.
- the sheet when exposed to elevated temperatures should maintain essentially its original dimensions.
- the sheet may soften when heated but should not lose its unitary structure.
- suitable polymeric binders are polymers and copolymers which are capable of further polymerizing or cross-linking when activated by heat from an ignition source.
- Halogenated binders which can be formed into flexible sheets of the chlorinated and/or fluorinated polymer and copolymer families such as those containing tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, and trifluorochloroethylene are among those which are useful in this invention.
- Fluoroelastomers of hexafluoropropylene/vinylidene fluoride sold under the Trademark Viton® by E.I. du Pont de Nemours & Co. are particularly useful.
- Polymeric compositions having a limiting oxygen index greater than 21 are preferred.
- one or more of the polymeric materials of the type mentioned above are combined using known methods to provide an explosive containing mixture which can be formed into sheets which remain flexible under ambient conditions. It is preferable that no cross-linking occurs during normal processing or during ambient temperature storage yet occurs rapidly on exposure to high temperatures.
- an activator which is activatable by heat from an ignition source is included in the system. When activated, the polymeric material is further polymerized or cross-linked thereby transforming it from its orginal flexible state to a hardened or thermoset state.
- organophosphoniu salts such as benzyl triphenyl phosphonium chloride, aromatic dihydroxy compounds such as bisphenol AF,and diamines or polyamines such as triethylene tetra ine.
- cap-sensitive explosives which can be used in the compositions of this invention include solid organic nitrates such as pentaerythritol tetranitrate (PETN) and nitro annite, organic nitramines such as tetryl, cyclo-trimethylenetrinitramine (RDX) , cyclotetramethylene tetranitra ine (HMX) , nitroguanadine, TACOT and mixtures of one or more of the foregoing explosives.
- solid organic nitrates such as pentaerythritol tetranitrate (PETN) and nitro annite
- organic nitramines such as tetryl, cyclo-trimethylenetrinitramine (RDX) , cyclotetramethylene tetranitra ine (HMX) , nitroguanadine, TACOT and mixtures of one or more of the foregoing explosives.
- Compatible flame retardant materials include boron containing compounds such as zinc borate, boric acid and ammonium fluoborate; phosphorus containing compounds, especially phosphate esters such as 2-ethylhexyl diphenyl phosphate, and isodecyl diphenyl phosphate, and tricresyl phosphate; antimony oxide with a chlorine or bromine donor; hydrated materials such as alumina trihydrate, and other materials such as chlorinated or brominated hydrocarbons.
- compatible it is meant that the flame retardant material does not react exothermically with the explosive materials when heated with the composition for a period of 24 hours at a temperature of 250°F.
- the other ingredients comprising the flexible explosive composition must not react exothermically when incorporated in the explosives composition.
- compositions of this invention include drip suppressants and/or reinforcing agents. Addition of a small amount of Teflon® polytetrafluoroethylene resin is particularly effective in suppressing dripping when the composition is subjected to ignition temperatures.
- drip suppressants and/or reinforcing agents. Addition of a small amount of Teflon® polytetrafluoroethylene resin is particularly effective in suppressing dripping when the composition is subjected to ignition temperatures.
- All of the ingredients are mixed together. A slurry of particles is made starting with water-wet explosive material and adding all other ingredients in a jacketed half-sigma blade mixer. Mixing is carried out at temperatures between 150 and 200°F, and drying is done under vacuum in the mixer. Sheets of the combined ingredients are formed by rolling through a two-roll mill. Extrusion processes may also be used.
- the amounts of the particular ingredients used in making the composition of the flexible explosive materials of this invention are not critical. In general the composition should contain from about 30 to 65% by weight of finely divided, cap-sensitive explosive. For most explosives purposes, amounts in the range from about 40 to 55% will produce satisfactory results. In a preferred embodiment of the invention, the cap-sensitive explosive is RDX in an amount of about 50.35 percent by weight.
- the amount of flame retardant material will vary depending on the particular material used. Generally, between 10 and 30% by weight gives satisfactory results.
- Sufficient polymeric binder must be present to provide a flexible sheet of the combined materials. Preferably, the amount used should provide a self-supporting sheet. Amounts in the range from about 20 to about 60% by weight may be used.
- Hot Bar Test A hot-plate is maintained at a constant temperature. A single piece of the explosive composition weighing 30 mg and roughly cubical in shape is placed in the center of the plate. The time the sample takes to ignite (in seconds) is measured and recorded. The test is conducted in triplicate, and the results are averaged. If no ignition occurs in three minutes, the results are recorded as "no ignition”.
- Detasheet® C6 is a flexible explosive containing 63% PETN sold by E.I. du Pont de Nemours & Co.
- Viton® CIO and LM are fluoroelastomers
- Viton® Curatives 20 and 30 are activators for the just-mention fluoroelastomers
- Teflon® DR is a TFE-Fluorocarbon resin all of which are sold by the E.I. du Pont de Nemours & Co.
- Example 2 This example demonstrates the effects of the various types of ingredients within the scope of the appended claims.
- the various ingredients are added sequentially to a PETN based explosive.
- Sample #2 contains only PETN and Viton® flame resistant poly ⁇ meric binder.
- Sample #3A demonstrated boric acid as the flame retardant.
- Sample #4A included Teflon® as a drip suppressant.
- Sample #6A employs crosslinking ingredients to allow the binder to "harden”. The hot bar test is as described hereinabove. Sample
- Example 3 This example employs RDX as the base explosive and a mixture of boric acid and phosphate esters as flame retardant.
- y.vnmple 4 This example employs a mixture of zinc oorate and hydrated alumina as the flame retardant.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Molecular Biology (AREA)
- Fireproofing Substances (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A cap-sensitive flexible explosive composition of reduced flammability is provided by incorporating a finely divided, cap-sensitive explosive in a flame resistant polymeric binder system which contains a compatible flame retardant material.
Description
TITLE
LO -FLAMMABILITY CAP-SENSITIVE
FLEXIBLE EXPLOSIVE COMPOSITION
The Government of the United States of America has rights in this invention pursuant to DOE Contract No. DE-AC04-87AL42544, Subcontract LCRL-89913, subject to advance, waiver of patent rights (A)87-005.
CROSS-REFERENCE TO A RELATED APPLICATION This is a continuation-in-part of U.S. Application Serial No. 07/318,794, filed March 3, 1989 (now abandoned) .
BACKGROUND This invention relates to a flexible explosive composition of reduced flammability. More particularly, the invention relates to a cap-sensitive flexible explosive composition containing a finely divided, cap-sensitive explosive admixed in a flame resistant polymeric binder system which includes a compatible flame retardant material. Such compositions are useful in applications which require self-supporting units rather than loose particles in environments in which the units may be subjected to ignition temperatures.
It is known in the explosives art to provide explosive materials in flexible sheet form. Finely divided explosives are typically combined with- polymeric binders. Embodiments in which the explosives are combined with fϊόurinated polymeric halocarbon polymers are disclosed in U.S. Patents 3,227,588, 3,326,731 and 4,750,887. None of these
patents address the problem of providing a flexible sheet explosive which is useful in environments in which the flexible sheet explosive may be subjected to ignition temperatures thereby destroying the explosive before it can be detonated. Such temperatures may be encountered in deep oil well drilling where the explosive is used in production stimulation charges.
SUMMARY OF THE INVENTION In accordance with this invention, there is provided a cap-sensitive flexible explosive composition of reduced flammability comprising a. finely divided, cap-sensitive explosive and a compatible flame retardant material in a flame resistant polymeric binder system. The compositions exhibit markedly reduced flammability both in terms of ignition resistance and burning rate. In preparing the compositions of this invention the cap-sensitive explosive and flame retardant material are admixed with the polymeric binder.
The polymeric binder is chosen from flame resistant polymers and copolymers which provide a flexible explosive sheet when compounded with additional ingredients as described herein. The sheet when exposed to elevated temperatures should maintain essentially its original dimensions. The sheet may soften when heated but should not lose its unitary structure. Among the suitable polymeric binders are polymers and copolymers which are capable of further polymerizing or cross-linking when activated by heat from an ignition source. Halogenated binders which can be formed into flexible sheets of the chlorinated and/or fluorinated polymer and copolymer families such as those containing tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, and
trifluorochloroethylene are among those which are useful in this invention. Fluoroelastomers of hexafluoropropylene/vinylidene fluoride sold under the Trademark Viton® by E.I. du Pont de Nemours & Co. are particularly useful. Polymeric compositions having a limiting oxygen index greater than 21 are preferred.
In preparing the compositions of this invention, one or more of the polymeric materials of the type mentioned above are combined using known methods to provide an explosive containing mixture which can be formed into sheets which remain flexible under ambient conditions. It is preferable that no cross-linking occurs during normal processing or during ambient temperature storage yet occurs rapidly on exposure to high temperatures. Preferably an activator which is activatable by heat from an ignition source is included in the system. When activated, the polymeric material is further polymerized or cross-linked thereby transforming it from its orginal flexible state to a hardened or thermoset state. Activators for various polymer systems are commercially available and include organophosphoniu salts such as benzyl triphenyl phosphonium chloride, aromatic dihydroxy compounds such as bisphenol AF,and diamines or polyamines such as triethylene tetra ine.
Examples of cap-sensitive explosives which can be used in the compositions of this invention include solid organic nitrates such as pentaerythritol tetranitrate (PETN) and nitro annite, organic nitramines such as tetryl, cyclo-trimethylenetrinitramine (RDX) , cyclotetramethylene tetranitra ine (HMX) , nitroguanadine, TACOT and mixtures of one or more of the foregoing explosives.
Compatible flame retardant materials include boron containing compounds such as zinc borate, boric acid and ammonium fluoborate; phosphorus containing compounds, especially phosphate esters such as 2-ethylhexyl diphenyl phosphate, and isodecyl diphenyl phosphate, and tricresyl phosphate; antimony oxide with a chlorine or bromine donor; hydrated materials such as alumina trihydrate, and other materials such as chlorinated or brominated hydrocarbons. By "compatible" it is meant that the flame retardant material does not react exothermically with the explosive materials when heated with the composition for a period of 24 hours at a temperature of 250°F. In addition the other ingredients comprising the flexible explosive composition must not react exothermically when incorporated in the explosives composition.
Other ingredients may be added to the compositions of this invention. These include drip suppressants and/or reinforcing agents. Addition of a small amount of Teflon® polytetrafluoroethylene resin is particularly effective in suppressing dripping when the composition is subjected to ignition temperatures. In preparing the compositions of this invention, all of the ingredients are mixed together. A slurry of particles is made starting with water-wet explosive material and adding all other ingredients in a jacketed half-sigma blade mixer. Mixing is carried out at temperatures between 150 and 200°F, and drying is done under vacuum in the mixer. Sheets of the combined ingredients are formed by rolling through a two-roll mill. Extrusion processes may also be used.
The amounts of the particular ingredients used in making the composition of the flexible explosive materials of this invention are not
critical. In general the composition should contain from about 30 to 65% by weight of finely divided, cap-sensitive explosive. For most explosives purposes, amounts in the range from about 40 to 55% will produce satisfactory results. In a preferred embodiment of the invention, the cap-sensitive explosive is RDX in an amount of about 50.35 percent by weight. The amount of flame retardant material will vary depending on the particular material used. Generally, between 10 and 30% by weight gives satisfactory results. Sufficient polymeric binder must be present to provide a flexible sheet of the combined materials. Preferably, the amount used should provide a self-supporting sheet. Amounts in the range from about 20 to about 60% by weight may be used.
To further illustrate the present invention, flexible explosive compositions were prepared as indicated above by mixing, drying and sheeting the mixed ingredients. In the examples which follow, parts and percentages are by weight unless otherwise stated. The flammability of the compositions was determined by the following tests:
"Hot Bar" Test - A hot-plate is maintained at a constant temperature. A single piece of the explosive composition weighing 30 mg and roughly cubical in shape is placed in the center of the plate. The time the sample takes to ignite (in seconds) is measured and recorded. The test is conducted in triplicate, and the results are averaged. If no ignition occurs in three minutes, the results are recorded as "no ignition".
"Strip Burn" Test - A sample l"x6"xl/8" is clamped at one end and hung vertically. The bottom of the sample is them exposed to the flame of an
acetylene torch. As soon as ignition is evident, the ignition source is removed. The time required for ingition is recorded along with the time required for the sample to be consumed. Any dripping behavior is noted.
"Plate Burn" Test - A sample of explosive composition 6"x6"xl/4" is divided into three parts by first cutting out a 4"x4" square leaving an "L" shaped piece. The square is then cut diagonally providing two triangular pieced. The pieces are then arranged, 1/8" apart, on an 8"x8" steel plate having a thickness of 1/8" in which a hole one inch in diameter has been cut at the- intersecting point of the crotch of the "L" and two points the triangle. An 8"x8" cover plate having a thickness of 1/8" is placed over the explosive material. The assembly is secured and suspended diagonally with the hole at the bottom. An acetylene torch flame is impinged on the metal at the top edge of the hole for two minutes, and the flame is them removed. Burning behavior is observed. After burning is complete, the assembly is taken apart, and a visual judgment is made of how much of the original sample remains.
Examples
Control Sample
Sample
Detasheet® C6
Composition (wt%)
PETN
Viton® CIO
Viton® LM
Teflon® DR
Viton® Curative No. 20
Viton® Curative No. 30
Zinc Borate
1.86
Detonation Velocity (m/seσ) 7000 6390 6430
Hot Bar Test Temperature (°F) Inαition Time (sec)
435 17.8
473 11.4 43.3 none
500 4.8
527 — 30.6 none
583 — 29.0 none
Strip Burn Test Ignition Time (sec)
0 2-3 2-6 Burn To Consumption (sec) 20-40 120-135 • 140-180
In the Strip Burn Test it was observed that the Control sample dripped copiously, and the dripping
material ignited and burned. Samples 1 and 2 did not drip.
Plate Burn Test Time Until Flame Extinguished (min) 6 1/2-2 1/2-2
Time Until Smoke Generation Stopped (min)
6 8 5
Percent Of Sample Remaining
0 80 95
(Detasheet® C6 is a flexible explosive containing 63% PETN sold by E.I. du Pont de Nemours & Co. Viton® CIO and LM are fluoroelastomers, Viton® Curatives 20 and 30 are activators for the just-mention fluoroelastomers and Teflon® DR is a TFE-Fluorocarbon resin all of which are sold by the E.I. du Pont de Nemours & Co. )
Example 2 This example demonstrates the effects of the various types of ingredients within the scope of the appended claims. The various ingredients are added sequentially to a PETN based explosive. Sample #2 contains only PETN and Viton® flame resistant poly¬ meric binder. Sample #3A demonstrated boric acid as the flame retardant. Sample #4A included Teflon® as a drip suppressant. Sample #6A employs crosslinking ingredients to allow the binder to "harden". The hot bar test is as described hereinabove.
Sample
Compound: Control 2 3A 4A 6A Detasheet® C6
Composition (wt%)
55 55
PETN 55 55
Viton® CIO 11.7 8.9 8.3 6.6
Viton® LM 33.3 25.1 23.5 18.7
Boric Acid 11.0 11.0 11.0
2.2 2.2
Teflon® DR 4.6
Viton® Curative No. 20 2.0
Viton® Curative No. 30
Specific
1.73 1.73 1.74
Gravity 1.5 Detonation Velocity
6656 7067 7117 6711 (m/sec) 7000
Hot Bar Test Temp. CF) TqnitioP Time (sec)
473 17.8 none none none none
500 ll-4 27.1 none none none
527 4.8 14.5 18.8 none none 554 14.0 34.5 none 32.5 33.5 583
Example 3 This example employs RDX as the base explosive and a mixture of boric acid and phosphate esters as flame retardant.
Composition (wt%)
50.0
RDX 5.2
Viton® CIO
21.0
Viton® LM 2.2
Teflon® DR
Viton® Curative No. 20 0.8
Viton® Curative No. 30 0.8
15.0
Boric Acid 5.0
Santicizer® 141
• 141 is available from Monsanto Company,
S _>aannt_ixc_ixz_e_r_ _ ._ _
St. Louis, Missouri and consists of a mixture of
2-ethylhexyl diphenyl phosphate and triphenyl phosphate.
1.59
Specific Gravity 6350
Detonation Velocity ^ignition at 583■F
Hot Bar Test
Strip Burn Test -
145 sec
Time to consumption
Plate Burn Test -
Time to extinguish flame 1 min 20 sec Time for smoke to stop 4 min 15 sec Percent Sample Remaining >99
y.vnmple 4 This example employs a mixture of zinc oorate and hydrated alumina as the flame retardant.
Claims
_ 2
I claim:
1. A cap-sensitive flexible explosive composition of reduced flammability comprising a finely divided, cap-sensitive explosive in a flame resistant polymeric binder system which comprises a fluorinated elastomer, or mixture of fluorinated elastomers, admixed with from about 10% to about 30% by weight of a compatible flame retardant material, a drip suppressant, and optionally a cross-linking activator whereby the binder system when exposed to heat from an ignition source will crosslink and harden at a rate which is faster than the rate at which the explosive composition will burn.
2. The composition of Claim 1 wherein said composition contains from about 30 to about 65% by weight of said explosive and the binder system comprises form about 20 to about 60% by weight of the composition.
3. The composition of Claim 1 wherein said explosive is selected from pentaerythritol tetranitrate or cyclo-trimethylenetrinitramine.
4. The composition of Claim 1 wherein said flame retardant material is selected from zinc borate or boric acid.
5. A cap-sensitive flexible explosive composition of reduced flammability comprising from about 30 to about 65% by weight of a finely divided, cap-sensitive explosive and from about 10 to about 30% by weight of a compatible flame retardant material admixed with a fluoroelastomer binder, said binder being capable of crosslinking and hardening when activated by intense heat from an ignition source at
a rate which is faster than the rate at which the explosive composition will burn.
6. The composition of Claim 5 in the form of a sheet.
7. The composition of Claim 5 wherein said explosive is pentaerythritol tetranitrate, said flame retardant material is zinc borate, and said fluoroelastomer is hexafluoropropylene/vinylidene fluoride.
8. The composition of Claim 7 wherein wherein said explosive material is present in an amount from about 40 to about 50% by weight and said flame retardant material is present in an amount from about 10 to about 20% by weight. 9. The composition of Claim 7 in the form of a sheet.
10. The composition of Claim 1 in which said flame retardant material comprises a mixture of phosphate esters. ιι. The composition of Claim 5 in which said explosive is cyclo-trimethylenetrinitramine, said flame retardant material is boric acid, and said fluoroelastomer is hexafluoropropylene/vinylidene fluoride. 12. The composition of Claim 5 in which the explosive is cyclo-trimethylenetrinitramine, said flame retardant material is zinc borate, and said fluoroelastomer is hexafluoropropylene/vinylidene fluoride. 13. The composition of Claim 1 in which said flame retardant material comprises a mixture of boric acid and phosphate esters.
14. The composition of Claim 1 in which said flame retardant material comprises a mixture of zinc borate and phosphate esters.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SK226-94A SK22694A3 (en) | 1991-08-27 | 1991-09-24 | Low-flammability cap - sensitive flexible explosive composition |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
USPCT/US91/05901 | 1991-08-27 | ||
PCT/US1991/005901 WO1993004020A1 (en) | 1991-08-27 | 1991-08-27 | Low flammability cap-sensitive flexible explosive composition |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993004021A1 true WO1993004021A1 (en) | 1993-03-04 |
Family
ID=22225749
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1991/005901 WO1993004020A1 (en) | 1989-03-03 | 1991-08-27 | Low flammability cap-sensitive flexible explosive composition |
PCT/US1991/006747 WO1993004021A1 (en) | 1991-08-27 | 1991-09-24 | Low-flammability cap-sensitive flexible explosive composition |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1991/005901 WO1993004020A1 (en) | 1989-03-03 | 1991-08-27 | Low flammability cap-sensitive flexible explosive composition |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0593479B1 (en) |
CZ (1) | CZ285383B6 (en) |
DE (1) | DE69122270T2 (en) |
SK (1) | SK22694A3 (en) |
WO (2) | WO1993004020A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1239968B (en) * | 1963-03-14 | 1967-05-03 | Delet | Self-supporting explosive mass with viscous-elastic binding agent, as well as process for their production |
US4098625A (en) * | 1968-05-08 | 1978-07-04 | The United States Of America As Represented By The Secretary Of The Navy | Explosive compositions bonded with fluorocarbon polymers |
GB1590802A (en) * | 1976-07-21 | 1981-06-10 | Hoechst Ag | Textile-reinforced rubber articles |
US4355126A (en) * | 1974-12-06 | 1982-10-19 | General Electric Company | Flame retardant, non-dripping compositions of polyphenylene ether and acrylonitrile-butadiene-styrene |
US4861397A (en) * | 1988-03-09 | 1989-08-29 | The United States Of America As Represented By The Secretary Of The Army | Fire-resistant explosives |
JPH02293388A (en) * | 1989-05-02 | 1990-12-04 | Tech Res & Dev Inst Of Japan Def Agency | Flame-retardant explosive composition |
EP0413167A1 (en) * | 1989-08-04 | 1991-02-20 | Bayer Ag | Flame-retardant nondripping polyamid molding compositions |
-
1991
- 1991-08-27 EP EP91916507A patent/EP0593479B1/en not_active Expired - Lifetime
- 1991-08-27 WO PCT/US1991/005901 patent/WO1993004020A1/en active IP Right Grant
- 1991-08-27 DE DE69122270T patent/DE69122270T2/en not_active Expired - Fee Related
- 1991-09-24 CZ CS94418A patent/CZ285383B6/en not_active IP Right Cessation
- 1991-09-24 WO PCT/US1991/006747 patent/WO1993004021A1/en active IP Right Grant
- 1991-09-24 SK SK226-94A patent/SK22694A3/en unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1239968B (en) * | 1963-03-14 | 1967-05-03 | Delet | Self-supporting explosive mass with viscous-elastic binding agent, as well as process for their production |
US4098625A (en) * | 1968-05-08 | 1978-07-04 | The United States Of America As Represented By The Secretary Of The Navy | Explosive compositions bonded with fluorocarbon polymers |
US4355126A (en) * | 1974-12-06 | 1982-10-19 | General Electric Company | Flame retardant, non-dripping compositions of polyphenylene ether and acrylonitrile-butadiene-styrene |
GB1590802A (en) * | 1976-07-21 | 1981-06-10 | Hoechst Ag | Textile-reinforced rubber articles |
US4861397A (en) * | 1988-03-09 | 1989-08-29 | The United States Of America As Represented By The Secretary Of The Army | Fire-resistant explosives |
JPH02293388A (en) * | 1989-05-02 | 1990-12-04 | Tech Res & Dev Inst Of Japan Def Agency | Flame-retardant explosive composition |
EP0413167A1 (en) * | 1989-08-04 | 1991-02-20 | Bayer Ag | Flame-retardant nondripping polyamid molding compositions |
Non-Patent Citations (3)
Title |
---|
A.K. BHOWMICK ET AL. 'Handbook of Elastomers' 1988 , MARCEL DEKKER , NEW YORK, USA * |
CHEMICAL ABSTRACTS, vol. 114, no. 16, 22 April 1991, Columbus, Ohio, US; abstract no. 146427P, 'Fire-resistant explosive compositions' page 170 ; & JP,A,90293388 (Japan, Defence Agency Tech. Res. Development Institute)(04-12-1990) * |
L.A. WALL 'Fluoropolymers' 1972 , WILEY-INTERSCIENCE , NEW YORK, USA * |
Also Published As
Publication number | Publication date |
---|---|
DE69122270D1 (en) | 1996-10-24 |
EP0593479A1 (en) | 1994-04-27 |
WO1993004020A1 (en) | 1993-03-04 |
SK22694A3 (en) | 1994-11-09 |
CZ285383B6 (en) | 1999-07-14 |
DE69122270T2 (en) | 1997-01-30 |
CZ41894A3 (en) | 1994-12-15 |
EP0593479B1 (en) | 1996-09-18 |
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