EP0411992A1 - Zündmittelzusammensetzung für pyrotechnisches Verzögerungselement - Google Patents
Zündmittelzusammensetzung für pyrotechnisches Verzögerungselement Download PDFInfo
- Publication number
- EP0411992A1 EP0411992A1 EP90402149A EP90402149A EP0411992A1 EP 0411992 A1 EP0411992 A1 EP 0411992A1 EP 90402149 A EP90402149 A EP 90402149A EP 90402149 A EP90402149 A EP 90402149A EP 0411992 A1 EP0411992 A1 EP 0411992A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- composition
- ignition
- pyrotechnic
- delay
- titanium
- 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 79
- 238000009527 percussion Methods 0.000 claims abstract description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 12
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010936 titanium Substances 0.000 claims abstract description 8
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 8
- 229910052796 boron Inorganic materials 0.000 claims abstract description 7
- WETZJIOEDGMBMA-UHFFFAOYSA-L lead styphnate Chemical compound [Pb+2].[O-]C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C([O-])=C1[N+]([O-])=O WETZJIOEDGMBMA-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 claims abstract description 5
- YPMOSINXXHVZIL-UHFFFAOYSA-N sulfanylideneantimony Chemical compound [Sb]=S YPMOSINXXHVZIL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000000977 initiatory effect Effects 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000037452 priming Effects 0.000 abstract description 3
- VRNINGUKUJWZTH-UHFFFAOYSA-L lead(2+);dithiocyanate Chemical compound [Pb+2].[S-]C#N.[S-]C#N VRNINGUKUJWZTH-UHFFFAOYSA-L 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 8
- QDMRQDKMCNPQQH-UHFFFAOYSA-N boranylidynetitanium Chemical compound [B].[Ti] QDMRQDKMCNPQQH-UHFFFAOYSA-N 0.000 description 7
- 230000000979 retarding effect Effects 0.000 description 7
- 230000001934 delay Effects 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- QFFVPLLCYGOFPU-UHFFFAOYSA-N barium chromate Chemical compound [Ba+2].[O-][Cr]([O-])(=O)=O QFFVPLLCYGOFPU-UHFFFAOYSA-N 0.000 description 2
- 229940083898 barium chromate Drugs 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 description 2
- 239000010957 pewter Substances 0.000 description 2
- 229910000498 pewter Inorganic materials 0.000 description 2
- 229910001487 potassium perchlorate Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 210000003456 pulmonary alveoli Anatomy 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B43/00—Compositions characterised by explosive or thermic constituents not provided for in groups C06B25/00 - C06B41/00
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C15/00—Pyrophoric compositions; Flints
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C7/00—Non-electric detonators; Blasting caps; Primers
Definitions
- the technical sector of the present invention is that of ignition compositions for pyrotechnic delays incorporated in an ammunition or in a security and arming device (DSA).
- DSA security and arming device
- Pyrotechnic delays of the delay cord type, include an ignition composition, a retarding pyrotechnic composition confined in a metal sheath, and possibly an explosive output relay. They are used in a pyrotechnic chain to induce a time delay.
- the solution usually adopted consists in defining a delay specific to the system studied, generally a tube containing a retarding composition loaded by compression. Such a delay is reliable and precise, but relatively bulky. Thus, when an adjustment of the duration of the delay is necessary (as for certain rockets of mortar projectiles), the constraints of the size lead to provide for the possibility of initiating the retarded composition compressed more or less close to the relay. ignition, by mechanical displacement of one of the elements of the rocket (delay carrier or relay carrier). Such a solution is not satisfactory, because it leads to a certain imprecision.
- timing problems do not have a pyrotechnic solution, and one has to resort to more complex timing techniques (watchmaking for example), often more bulky and more expensive.
- the aim of the present invention is therefore to propose an ignition composition for pyrotechnic delay which can be initiated by percussion, capable of being integrated into ammunition or into an arming and security device, of reduced diameter and of low cost.
- the subject of the invention is therefore an ignition composition that can be initiated by percussion for pyrotechnic delay, characterized in that it comprises a first composition for ignition by percussion and a second composition consisting of a mixture of titanium and boron powders. .
- the first composition can be a tablet of potassium chlorate, lead thyocianate, antimony sulfide and lead styphnate.
- the second composition can comprise 80% by mass of titanium powder and 20% by mass of boron powder.
- the first composition can be compressed at a pressure between 0.5.108 and 2.1O8 Pa and the second composition at a pressure between 0.5.108 and 2.5.108 Pa.
- the invention also relates to the application of the ignition composition to the production of a delay cord, integrated in a metal sheath with an external diameter less than or equal to 3 mm, containing a pyrotechnic composition burning at a lower speed or equal to 4 mm / s.
- An advantage of the present invention lies in obtaining an ignition composition of small dimensions, simple to implement and to manufacture.
- initiation composition initiates delay cords of small diameter, that is to say less than or equal to 3 mm.
- Another advantage lies in the fact that the delay composition is initiated without disorganization or destruction of the cell which contains it, thus avoiding a disturbance of the pyrotechnic chain.
- the delay composition in itself is well known to those skilled in the art. It consists of tungsten, barium chromate and potassium perchlorate distributed according to the following respective percentages by mass and this by way of example: 28, 62, and 1O.
- We take advantage of the properties of this composition namely: - weakly gaseous combustion with a reduced risk of ejection of residues and disorganization of any of the constituents of the pyrotechnic chain, or even damage to the DSA, - security of use and storage due to the low sensitivity, - excellent resistance to aging (lifespan) 20 years at 20 ° C, greatly exceeding the average storage period of most munitions and therefore requiring no visit during this same period.
- This igniter comprises a percussion ignition composition combined with a titanium-boron composition.
- the titanium-boron composition has certain qualities which make it particularly suitable for the intended use: - high calorific value, - combustion rigorously without gas and therefore without risk of projection of residues, disorganization of the titanium-boron tablet which can cause poor contact between this same composition and the retarding composition, and thus prevent the transmission of combustion, - non pyrotechnic basic products (titanium and boron), easy and safe to use, which improves manufacturing safety, - Production of an ignition of the delayed composition by combustion front.
- the particle size of titanium and boron has no significant influence on the performance of the ignition composition.
- the titanium powder has an average particle size of the order of 15 ⁇ m and the boron powder of 1.2 ⁇ m.
- the titanium-boron composition being impossible to ignite by percussion, it is essential to provide a priming composition.
- the latter consists of a tablet of potassium chlorate, lead thyocianate, antimony sulfide and lead styphnate.
- This composition is known and is easy to initiate by percussion. It is sufficiently energetic to initiate the hot titanium-boron composition, without disorganizing it or destroying the cell. Its percussion energy is around 0.1 Joule and it generates a high output energy, around 100 Joules. Finally, the deflagration of this composition is transmitted neither to the titanium-boron composition, nor to the pyrotechnic delay composition.
- a delay is therefore produced comprising a head primer crimped onto one end of a metal sheath.
- This sheath can for example be a lead or tin sheath of about 3 mm internal diameter.
- the other end of this cord carries an output relay, produced in a known manner and which will not be the subject of a more detailed description.
- the head primer consists of a cell in which the first priming composition and the second composition are compressed.
- the alveolus has at its end a passage hole for a striker, closed by a thin paillet ensuring sealing.
- the delay cord is obtained from a large diameter tube which is cut to a determined length and which is then filled with retarding composition. After sealing the ends, this tube is introduced into a machine which will roll it between rollers until the desired diameter is obtained, the length of the cord being of course a function of this diameter.
- the retarding composition has been the subject of aging tests which suggest a lifetime greater than 20 years at 30 ° C. and 1O years at 60 ° C.
- the delay according to the invention can be used whenever the following characteristics are desired: - very slow combustion (2 mm / s) inducing long delay times for a short length of cord and therefore a reduced mass, which is important in the case of on-board devices, - ease of integration into a system thanks to the flexibility of the cord and its ability to function despite kinks, - good reproducibility of the performances which are practically not affected by the conditions of use, - conservation of performance at low temperature, - good resistance to aging.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Air Bags (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8910339 | 1989-08-01 | ||
| FR8910339A FR2650586B1 (fr) | 1989-08-01 | 1989-08-01 | Composition d'allumage pour retard pyrotechnique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0411992A1 true EP0411992A1 (de) | 1991-02-06 |
| EP0411992B1 EP0411992B1 (de) | 1993-09-29 |
Family
ID=9384346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19900402149 Expired - Lifetime EP0411992B1 (de) | 1989-08-01 | 1990-07-26 | Zündmittelzusammensetzung für pyrotechnisches Verzögerungselement |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0411992B1 (de) |
| DE (1) | DE69003627T2 (de) |
| FR (1) | FR2650586B1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2786262B1 (fr) | 1998-11-23 | 2001-10-19 | Giat Ind Sa | Dispositif de protection active d'une paroi de vehicule ou de structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2480141A (en) * | 1944-08-22 | 1949-08-30 | Fed Cartridge Corp | Primer mixture |
| US3499386A (en) * | 1962-11-29 | 1970-03-10 | Dynamit Nobel Ag | Primer |
| FR2015074A1 (de) * | 1968-08-05 | 1970-04-24 | Dynamit Nobel Ag | |
| US4015529A (en) * | 1975-06-04 | 1977-04-05 | The United States Of America As Represented By The Secretary Of The Army | Illuminative and incendiary explosive munitions |
| EP0046612A2 (de) * | 1980-08-22 | 1982-03-03 | Hughes Aircraft Company | Zusammensetzungen zur Verwendung in Wärme erzeugenden Reaktionen |
| 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 |
-
1989
- 1989-08-01 FR FR8910339A patent/FR2650586B1/fr not_active Expired - Fee Related
-
1990
- 1990-07-26 EP EP19900402149 patent/EP0411992B1/de not_active Expired - Lifetime
- 1990-07-26 DE DE1990603627 patent/DE69003627T2/de not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2480141A (en) * | 1944-08-22 | 1949-08-30 | Fed Cartridge Corp | Primer mixture |
| US3499386A (en) * | 1962-11-29 | 1970-03-10 | Dynamit Nobel Ag | Primer |
| FR2015074A1 (de) * | 1968-08-05 | 1970-04-24 | Dynamit Nobel Ag | |
| US4015529A (en) * | 1975-06-04 | 1977-04-05 | The United States Of America As Represented By The Secretary Of The Army | Illuminative and incendiary explosive munitions |
| EP0046612A2 (de) * | 1980-08-22 | 1982-03-03 | Hughes Aircraft Company | Zusammensetzungen zur Verwendung in Wärme erzeugenden Reaktionen |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69003627D1 (de) | 1993-11-04 |
| FR2650586B1 (fr) | 1991-10-11 |
| FR2650586A1 (fr) | 1991-02-08 |
| DE69003627T2 (de) | 1994-02-24 |
| EP0411992B1 (de) | 1993-09-29 |
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