EP0375821A1 - Perkussionsempfindliche thermostabile pyrotechnische Zusammensetzung - Google Patents
Perkussionsempfindliche thermostabile pyrotechnische Zusammensetzung Download PDFInfo
- Publication number
- EP0375821A1 EP0375821A1 EP88403369A EP88403369A EP0375821A1 EP 0375821 A1 EP0375821 A1 EP 0375821A1 EP 88403369 A EP88403369 A EP 88403369A EP 88403369 A EP88403369 A EP 88403369A EP 0375821 A1 EP0375821 A1 EP 0375821A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mass
- selenium
- sensitive
- percussion
- sulfur
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 41
- 238000009527 percussion Methods 0.000 title claims abstract description 12
- 239000002360 explosive Substances 0.000 claims abstract description 14
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims abstract description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052711 selenium Inorganic materials 0.000 claims abstract description 12
- 239000011669 selenium Substances 0.000 claims abstract description 12
- QBFXQJXHEPIJKW-UHFFFAOYSA-N silver azide Chemical compound [Ag+].[N-]=[N+]=[N-] QBFXQJXHEPIJKW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 8
- 239000011593 sulfur Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 4
- 230000037452 priming Effects 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 6
- 229910052714 tellurium Inorganic materials 0.000 claims description 6
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 6
- 150000001540 azides Chemical class 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 150000004655 tetrazenes Chemical class 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001235 sensitizing effect Effects 0.000 description 2
- IUKSYUOJRHDWRR-UHFFFAOYSA-N 2-diazonio-4,6-dinitrophenolate Chemical compound [O-]C1=C([N+]#N)C=C([N+]([O-])=O)C=C1[N+]([O-])=O IUKSYUOJRHDWRR-UHFFFAOYSA-N 0.000 description 1
- PIPKLBFFVRRDEJ-UHFFFAOYSA-N N=NNN.[N-]=[N+]=[N-] Chemical compound N=NNN.[N-]=[N+]=[N-] PIPKLBFFVRRDEJ-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- VRNINGUKUJWZTH-UHFFFAOYSA-L lead(2+);dithiocyanate Chemical compound [Pb+2].[S-]C#N.[S-]C#N VRNINGUKUJWZTH-UHFFFAOYSA-L 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
- YPMOSINXXHVZIL-UHFFFAOYSA-N sulfanylideneantimony Chemical compound [Sb]=S YPMOSINXXHVZIL-UHFFFAOYSA-N 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C7/00—Non-electric detonators; Blasting caps; Primers
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B35/00—Compositions containing a metal azide
Definitions
- thermostable pyrotechnic compositions sensitive to percussion such as detonator primers.
- compositions intended for the initiation of detonation relays produced from metal azides to which a sensitizer such as tetrazene or diazodinitrophenol, which are products, is added. organic.
- these compositions can comprise 95% by mass of lead azide and 5% by mass of tetrazene.
- the main drawback of these compositions lies in the instability of the sensitizer when the primers are used in a harsh environment, at a temperature above 70 ° C. Indeed, this temperature is close to the decomposition temperature of tetrazene which is around 70 ° C.
- patent FR-A-2 386 505 is known in which it is proposed to solve this problem by playing on the particle size of tetrazene in order to increase its decomposition temperature.
- the problem is not completely resolved due to the hazards inherent in manufacturing.
- Ternary pyrotechnic compositions which are stable at a temperature of 90 ° C. of the lead thiocyanate, potassium chlorate, antimony sulfide type. However, they are sensitive to humidity and do not have any priming power.
- the object of the present invention is to provide a new initiation composition sensitive to percussion, containing a new class of sensitizers, not having the drawbacks of low thermostability.
- the subject of the invention is therefore a pyrotechnic composition stable at a temperature of the order of 100 ° C., sensitive to percussion, having a priming power, characterized in that it comprises a mixture of a primary explosive constituted by l silver azide and a powder of selenium, tellurium and / or sulfur.
- the primary explosive can be chosen according to one for mass centering between 50 and 99%, and the powder according to a mass percentage between 1 and 50%.
- the composition comprises 95% by mass of silver azide and 5% by mass of selenium.
- the composition comprises 85% by mass of silver azide and 15% by mass of sulfur.
- the particle size of the selenium, tellurium and / or sulfur powder is advantageously between 2 and 250 ⁇ m.
- a result of the present invention resides in the fact that the priming composition can be used at a temperature of the order of 100 ° C., without significantly altering its sensitivity to percussion.
- Selenium, sulfur and tellurium powders are explosive sensitizing agents and are used pure, alone or as a mixture and are capable, by their physicochemical properties, of sensitizing the primary explosive without degrading its power. priming.
- the procedure is as follows: the azide and the sensitizer are introduced into a rotary mixer intended for pyrotechnic compositions and comprising the appropriate safety devices. After homogenization of the mixture, the priming cells are directly filled.
- Example 1 85% silver azide and 15% sulfur
- Example 2 95% silver azide and 5% selenium.
- initiation composition according to the invention, various tests were carried out and, in particular, their sensitivity to percussion and their initiation power were measured compared with a conventional control composition comprising 95% by mass of lead azide and 5% by mass of tetrazene.
- a number of detonator primers are prepared at the rate of 45 mg of composition per cell. These primers and the control are subjected to the following treatments: Series 1: no environmental test, Series 2: storage at 75 ° C for 10 days, Series 3: storage at 95 ° C for 8 days, Series 4: storage at 95 ° C for 30 days, Series 5: storage at 95 ° C for 2 months, Series 6: it is subjected to 10 climatic cycles of 36 hours comprising a 12 hour stay at 74 ° C, then rise in 2 hours at 100 ° C and stay of 4 hours at this temperature, then lowering in 1 hour at -54 ° C and 14 hour stay at this temperature, then rise in 3 hours to + 74 °.
- reference primers serving as reference are loaded with the mixture of lead azide-tetrazene at 5% by mass.
- the sensitivity to percussion is determined according to the procedure known in this technical sector by falling from a 3.2 g ball.
- the sensitivities are expressed by the heights of fall in millimeters of the ball corresponding to a probability of operation of 0.5.
- compositions according to the invention are more sensitive and more stable in temperature than conventional compositions.
- sensitivity of the primary explosive used corresponds to heights of fall greater than 900 mm.
- the priming power was evaluated by drilling steel discs according to the known method of the "gap test".
- the composition to be tested is loaded into a cell with an internal diameter of 3.8 mm.
- a relay of 50 mg of secondary explosive, a steel barrier of variable thickness, the detonator primer to be tested is successively introduced into a steel jacket.
- An AU4G perforation disc is placed at the end of the steel jacket.
- the test consists of determining the thickness of the steel barrier which does not detonate the secondary explosive and therefore does not puncture the steel barrier.
- the barrier thickness allowed by the compositions tested are the following: Examples 1 and 2: 0.8mm Witness: 0.4 mm
- compositions according to the invention have a priming power greater than that of the conventional control composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8888403369T DE3869964D1 (de) | 1987-12-03 | 1988-12-30 | Perkussionsempfindliche thermostabile pyrotechnische zusammensetzung. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8716762A FR2624114B1 (fr) | 1987-12-03 | 1987-12-03 | Composition pyrotechnique thermostable sensible a la percussion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0375821A1 true EP0375821A1 (de) | 1990-07-04 |
| EP0375821B1 EP0375821B1 (de) | 1992-04-08 |
Family
ID=9357415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88403369A Expired - Lifetime EP0375821B1 (de) | 1987-12-03 | 1988-12-30 | Perkussionsempfindliche thermostabile pyrotechnische Zusammensetzung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4877466A (de) |
| EP (1) | EP0375821B1 (de) |
| DE (1) | DE3869964D1 (de) |
| FR (1) | FR2624114B1 (de) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE661073C (de) * | 1931-07-31 | 1938-06-10 | Hercules Powder Co Ltd | Verfahren zur Herstellung von Zeitzuendern |
| US2607672A (en) * | 1948-12-01 | 1952-08-19 | Du Pont | Ignition composition |
| DE1173373B (de) * | 1962-04-12 | 1967-09-07 | Diehl Fa | Verfahren zur Herstellung von Initial-sprengstoffen mit definierter elektrischer Leitfaehigkeit |
| US3775199A (en) * | 1972-10-13 | 1973-11-27 | Us Navy | Nitrogen generator |
| US3779823A (en) * | 1971-11-18 | 1973-12-18 | R Price | Abrasion resistant gas generating compositions for use in inflating safety crash bags |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB383650A (en) * | 1931-06-24 | 1932-11-24 | Hercules Powder Co Ltd | Improvement in delay action blasting detonators and the like |
| US2461544A (en) * | 1944-06-09 | 1949-02-15 | George C Hale | Fuse powder composition |
| US2867517A (en) * | 1956-12-31 | 1959-01-06 | Hercules Powder Co Ltd | Detonator compositions |
| US3498858A (en) * | 1967-10-13 | 1970-03-03 | Standard Oil Co | Method and a composition comprising silver carbonate and amorphous boron |
| FR2309493A1 (fr) * | 1973-03-15 | 1976-11-26 | France Etat | Substances pyrotechniques pulverulentes ameliorees et leur procede d'obtention |
| US3895577A (en) * | 1973-09-25 | 1975-07-22 | Hercules Inc | Long burning delay blasting caps |
| US3971319A (en) * | 1974-10-18 | 1976-07-27 | Hercules Incorporated | Thermally actuated percussion initiatable explosive cartridge assembly |
| US4329924A (en) * | 1979-09-11 | 1982-05-18 | Etat Francais Represente Par Le Delegue General Pour L'armement | Electric primer with conductive composition |
| US4566921A (en) * | 1985-02-08 | 1986-01-28 | L'etat Francais Represente Par Le Delegue Ministeriel Pour L'armement | Priming composition which is sensitive to percussion and a method for preparing it |
-
1987
- 1987-12-03 FR FR8716762A patent/FR2624114B1/fr not_active Expired - Lifetime
-
1988
- 1988-12-30 EP EP88403369A patent/EP0375821B1/de not_active Expired - Lifetime
- 1988-12-30 DE DE8888403369T patent/DE3869964D1/de not_active Expired - Fee Related
- 1988-12-30 US US07/292,247 patent/US4877466A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE661073C (de) * | 1931-07-31 | 1938-06-10 | Hercules Powder Co Ltd | Verfahren zur Herstellung von Zeitzuendern |
| US2607672A (en) * | 1948-12-01 | 1952-08-19 | Du Pont | Ignition composition |
| DE1173373B (de) * | 1962-04-12 | 1967-09-07 | Diehl Fa | Verfahren zur Herstellung von Initial-sprengstoffen mit definierter elektrischer Leitfaehigkeit |
| US3779823A (en) * | 1971-11-18 | 1973-12-18 | R Price | Abrasion resistant gas generating compositions for use in inflating safety crash bags |
| US3775199A (en) * | 1972-10-13 | 1973-11-27 | Us Navy | Nitrogen generator |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2624114A1 (fr) | 1989-06-09 |
| FR2624114B1 (fr) | 1991-06-07 |
| US4877466A (en) | 1989-10-31 |
| EP0375821B1 (de) | 1992-04-08 |
| DE3869964D1 (de) | 1992-05-14 |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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