EP0332986B1 - Delay charges with long delay time - Google Patents

Delay charges with long delay time Download PDF

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Publication number
EP0332986B1
EP0332986B1 EP89103961A EP89103961A EP0332986B1 EP 0332986 B1 EP0332986 B1 EP 0332986B1 EP 89103961 A EP89103961 A EP 89103961A EP 89103961 A EP89103961 A EP 89103961A EP 0332986 B1 EP0332986 B1 EP 0332986B1
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Prior art keywords
delay
charges
weight
barium
tungsten
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EP89103961A
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German (de)
French (fr)
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EP0332986A1 (en
Inventor
Günther Faber
Hans Dr. Florin
Peter-Josef Grommes
Peter Röh
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Dynamit Nobel AG
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Dynamit Nobel AG
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    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
    • C06B33/12—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being two or more oxygen-yielding compounds
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C5/00—Fuses, e.g. fuse cords
    • C06C5/06—Fuse igniting means; Fuse connectors

Definitions

  • the present invention relates to delay sets with delay times which are in the range of seconds and which are constructed from a pyrotechnic mixture of powdered metallic tungsten, barium chromate and potassium perchlorate.
  • the delay sets even at a temperature of + 71 ° C have a certain delay time of at least 1.2 s / mm.
  • the known deceleration rates based on tungsten / BaCrO4 / KClO4 still burn off perfectly even if they are subjected to a rotation of up to 17,000 rpm. Correct burning can still take place even with a rotation of more than 17,000 rpm.
  • the loads mentioned can also be used in the temperature range between - 54 ° C and + 71 ° C, whereby a perfect burnout is guaranteed within the desired delay time.
  • a delay set which additionally contains calcium fluoride and finely disperse diatomaceous earth on the basis of powdered metallic tungsten, barium chromate and potassium perchlorate, but the effect is improved according to the invention if the delay set instead of diatomaceous earth finely disperse SiO2 with specific surface areas from 100 to 500 m2 / g, preferably from 200 to 400 m2 / g, in particular in the form of pyrogenic silica. An addition of only 0.1 to 5% by weight, based on the entire set, is sufficient to achieve a corresponding effect.
  • the effect is further improved if finely dispersed SiO2 with specific surfaces from 100 to 500 m2 / g, preferably from 200 to 400 m2 / g, in particular in the form of pyrogenic silica, is added to the retardation rate. It is also sufficient to add only 0.1 to 5% by weight, based on the entire set, in order to achieve a corresponding effect.
  • the amount of barium hexafluorosilicate (BaSiF6) or calcium fluoride (CaF2) added can vary between 1 and 10% by weight, based on the entire set.
  • the barium hexafluorosilicate is preferably used in amounts between 2 and 6% by weight, while the calcium fluoride is preferably used in amounts between 1 and 5% by weight, in each case based on the entire set.
  • the delay sets according to the invention can be used both in powder form and in bound form.
  • Inorganic or organic cellulose esters such as nitrocellulose, acetyl cellulose or cellulose esters of higher aliphatic carboxylic acids (e.g. butteric or propionic acid), the latter optionally in a mixture with acetyl cellulose, are suitable as binders to increase the flowability of the sets.
  • Their proportion in the delay rates is generally between 0.5 and 3% by weight.
  • the burning time of the delay sets according to the invention can be set in a manner known per se by varying the ratios of the component proportions to values between 0.1 and 2 s / mm, preferably to values above 0.8 s / mm set height.
  • the grain size of the tungsten used is generally less than 20 ⁇ m.
  • the burning times can also be set to the desired values within small ranges. This can be achieved in particular if two different grain size ranges are selected, the fraction of the grain size range ⁇ 10 ⁇ m being between 20 and 60% by weight of the total tungsten powder; the rest of the tungsten powder should then have a grain size between 10 and 20 microns.
  • the sets according to the invention are produced in a manner known per se.
  • the unbound sets can be made by simultaneously mixing the individual components. If binders are also used, these are dissolved or suspended in a suitable solvent (e.g. acetone) and the remaining constituents are dispersed in this solution or suspension. The dispersion obtained is then largely freed from the solvent, so that it is possible to produce free-flowing grains in a manner known per se, which are then compressed to the desired sets.
  • a suitable solvent e.g. acetone
  • the sentences according to the invention are u. used for delayed detonators and igniters and for ignition retarders.
  • the pressed-in delay sets were ignited by a firing set.
  • the burning times were measured at temperatures + 71 ° C or 20 ° C or - 54 ° C with and without rotation.
  • the results are shown in the following table: Temperature [° C] Burning times [sec / 10 mm charging station] without rotation with rotation (17,000 rpm) + 71 12.5 15.5 + 20 13 16 - 54 15 18.5

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Networks Using Active Elements (AREA)
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  • Developing Agents For Electrophotography (AREA)
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Abstract

The present invention relates to delay charges with delay times in the range of seconds. These charges are based on a pyrotechnic mixture of pulverulent metallic tungsten, barium chromate and potassium perchlorate. According to the invention the mixture additionally also contains either barium hexafluosilicate or calcium fluoride. The additives have the effect that these charges burn perfectly through even under more difficult environmental conditions such as, for example, very high rotation, vibration, impact, shock and at the same time extremely low minus temperatures. The effect of the said additives can even be improved if the delay charges additionally also contain pyrogenic silica mixed in.

Description

Gegenstand der vorliegenden Erfindung sind Verzögerungssätze mit Verzögerungszeiten, die im Sekundenbereich liegen und die aus einem pyrotechnischen Gemisch aus pulverförmigem metallischem Wolfram, Bariumchromat und Kaliumperchlorat aufgebaut sind.The present invention relates to delay sets with delay times which are in the range of seconds and which are constructed from a pyrotechnic mixture of powdered metallic tungsten, barium chromate and potassium perchlorate.

Es ist bekannt, daß pyrotechnische Gemische aus Wolfram, Bariumchromat und Kaliumperchlorat in Verzögerungssätzen mit langen Verzögerungszeiten eingesetzt werden. Je nach Zusammensetzung und Korngröße des Wolframs können damit Verzögerungszeiten zwischen 0,1 und 2 s/mm Satzhöhe erzielt werden (vgl. Ellern "Military and Civilian Pyrotechnics" 1968, Seiten 201 bis 203).It is known that pyrotechnic mixtures of tungsten, barium chromate and potassium perchlorate are used in delay sets with long delay times. Depending on the composition and grain size of the tungsten, delay times between 0.1 and 2 s / mm set height can be achieved (see Ellern "Military and Civilian Pyrotechnics" 1968, pages 201 to 203).

Solche bekannten Verzögerungssätze erfüllen jedoch schon bei Verzögerungszeiten über 0,8 s/mm Satzhöhe nicht mehr alle Bedingungen, die heute an solche Sätze gestellt werden. Diese Sätze brennen beispielsweise nicht mehr einwandfrei ab, wenn sie Temperaturen von - 50 °C ausgesetzt sind oder wenn sie einer mechanischen Belastung wie Vibration, Stoß, Schock oder Rotation unterworfen werden. Bei diesen Bedingungen erhält man einen hohen Anteil an Zündversagern.However, such known delay sets no longer meet all the conditions that are set for such sets even with delay times above 0.8 s / mm set height. These sets, for example, no longer burn properly if they are exposed to temperatures of - 50 ° C or if they are subjected to mechanical stress such as vibration, shock, shock or rotation. A high proportion of ignition failures is obtained under these conditions.

Es bestand deshalb die Aufgabe, die bekannten Verzögerungssätze auf Basis von Wolfram, Bariumchromat und Kaliumperchlorat so zu verbessern, daß sie auch unter extremen mechanischen Umweltbedingungen und bei hohen Minustemperaturen noch einwandfrei durchzünden.It was therefore the task of improving the known retardation rates based on tungsten, barium chromate and potassium perchlorate so that they still ignite perfectly even under extreme mechanical environmental conditions and at high sub-zero temperatures.

Weiterhin bestand die Aufgabe, daß die Verzögerungssätze auch bei einer Temperatur von + 71 °C eine bestimmte Verzögerungszeit von mindestens 1,2 s/mm aufweisen.Furthermore, there was the task that the delay sets even at a temperature of + 71 ° C have a certain delay time of at least 1.2 s / mm.

In Erfüllung dieser Aufgabe wurden nun Verzogerungssätze im Sekundenbereich auf Basis eines pyrotechnischen Gemischs aus pulverförmigem metallischem Wolfram, Bariumchromat und Kaliumperchlorat gefunden, die durch einen zusätzlichen Gehalt an (a) Bariumhexafluorosilikat (BaSiF₆) oder (b) Calciumfluorid zusammen mit sein dispersem SiO₂ mit einer spezifischen Oberfläche von 100 bis 500 m²/g, gekennzeichnet sind.In fulfilling this task, delays in the seconds range based on a pyrotechnic mixture of powdered metallic tungsten, barium chromate and potassium perchlorate have now been found, which are caused by an additional content of (a) barium hexafluorosilicate (BaSiF₆) or (b) calcium fluoride together with its disperse SiO₂ with a specific Surface of 100 to 500 m² / g, are marked.

Infolge des Gehalts an einem der erfindungsgemäßen Zusätze brennen die bekannten Verzögerungssätze auf Basis von Wolfram/BaCrO₄/KClO₄ auch dann noch einwandfrei ab, wenn sie einer Rotation bis zu 17 000 U/min unterworfen sind. Auch bei einer Rotation von mehr als 17 000 U/min kann noch ein einwandfreies Abbrennen erfolgen. Die genannten Belastungen können auch im Temperaturbereich zwischen - 54 °C und + 71 °C angewendet werden, wobei ein einwandfreies Durchbrennen innerhalb der gewünschten Verzögerungszeit gewährleistet ist.As a result of the content of one of the additives according to the invention, the known deceleration rates based on tungsten / BaCrO₄ / KClO₄ still burn off perfectly even if they are subjected to a rotation of up to 17,000 rpm. Correct burning can still take place even with a rotation of more than 17,000 rpm. The loads mentioned can also be used in the temperature range between - 54 ° C and + 71 ° C, whereby a perfect burnout is guaranteed within the desired delay time.

Aus dem US-Patent 3 701 697 ist zwar schon ein Verzögerungssatz bekannt, der auf der Basis von pulverförmigem metallischem Wolfram, Bariumchromat und Kaliumperchlorat zusätzlich Calciumfluorid und fein disperse Diatomeenerde enthält, doch wird die Wirkung erfindungsgemäß verbessert, wenn dem Verzögerungssatz statt Diatomeenerde fein disperses SiO₂ mit spezifischen Oberflächen von 100 bis 500 m²/g, vorzugsweise von 200 bis 400 m²/g, insbesondere in Form von pyrogener Kieselsäure hinzugefügt wird. Es genügt dabei ein Zusatz von nur 0,1 bis 5 Gew.-%, bezogen auf den gesamten Satz, um eine entsprechende Wirkung zu erzielen.From US Pat. No. 3,701,697 a delay set is already known which additionally contains calcium fluoride and finely disperse diatomaceous earth on the basis of powdered metallic tungsten, barium chromate and potassium perchlorate, but the effect is improved according to the invention if the delay set instead of diatomaceous earth finely disperse SiO₂ with specific surface areas from 100 to 500 m² / g, preferably from 200 to 400 m² / g, in particular in the form of pyrogenic silica. An addition of only 0.1 to 5% by weight, based on the entire set, is sufficient to achieve a corresponding effect.

Auch beim Einsatz von Bariumhexafluorosilikat wird die Wirkung weiter verbessert, wenn dem Verzögerungssatz fein disperses SiO₂ mit spezifischen Oberflächen von 100 bis 500 m²/g, bevorzugt von 200 bis 400 m²/g, insbesondere in Form von pyrogener Kieselsäure hinzugefügt wird. Es genügt auch hierbei ein Zusatz von nur 0,1 bis 5 Gew.-%, bezogen auf den gesamten Satz, um eine entsprechende Wirkung zu erzielen.Even when barium hexafluorosilicate is used, the effect is further improved if finely dispersed SiO₂ with specific surfaces from 100 to 500 m² / g, preferably from 200 to 400 m² / g, in particular in the form of pyrogenic silica, is added to the retardation rate. It is also sufficient to add only 0.1 to 5% by weight, based on the entire set, in order to achieve a corresponding effect.

Die Menge des Zusatzes an Bariumhexafluorosilikat (BaSiF₆) oder Calciumfluorid (CaF₂) kann zwischen 1 und 10 Gew.-%, bezogen auf den gesamten Satz, schwanken. Das Bariumhexafluorosilikat wird bevorzugt in Mengen zwischen 2 und 6 Gew.-% eingesetzt, wahrend das Calciumfluorid bevorzugt in Mengen zwischen 1 und 5 Gew.-%, jeweils bezogen auf den gesamten Satz, eingesetzt wird.The amount of barium hexafluorosilicate (BaSiF₆) or calcium fluoride (CaF₂) added can vary between 1 and 10% by weight, based on the entire set. The barium hexafluorosilicate is preferably used in amounts between 2 and 6% by weight, while the calcium fluoride is preferably used in amounts between 1 and 5% by weight, in each case based on the entire set.

Die erfindungsgemäßen Verzögerungssätze lassen sich sowohl in pulverförmiger Form als auch gebunden einsetzen. Als Bindemittel zur Erhöhung der Rieselfähigkeit der Sätze eignen sich anorganische oder organische Celluloseester wie Nitrocellulose, Acetylcellulose oder Celluloseester höherer aliphatischer Carbonsäuren (z. B. der Butter- oder Propionsäure), letztere gegebenenfalls im Gemisch mit Acetylcellulose. Ihr Ansteil in den Verzögerungssätzen liegt im allgemeinen zwischen 0,5 und 3 Gew.-%.The delay sets according to the invention can be used both in powder form and in bound form. Inorganic or organic cellulose esters such as nitrocellulose, acetyl cellulose or cellulose esters of higher aliphatic carboxylic acids (e.g. butteric or propionic acid), the latter optionally in a mixture with acetyl cellulose, are suitable as binders to increase the flowability of the sets. Their proportion in the delay rates is generally between 0.5 and 3% by weight.

Die Brennzeit der erfindungsgemäßen Verzögerungssätze kann in an sich bekannter Weise durch Variation der Verhältnisse der Komponenten-Anteile auf Werte zwischen 0,1 und 2 s/mm, vorzugsweise auf Werte über 0,8 s/mm Satzhöhe eingestellt werden.The burning time of the delay sets according to the invention can be set in a manner known per se by varying the ratios of the component proportions to values between 0.1 and 2 s / mm, preferably to values above 0.8 s / mm set height.

Die Korngröße des eingesetzten Wolframs liegt im allgemeinen unter 20 µm. Durch Änderung der Korngrößen-Verteilungen lassen sich die Brennzeiten innerhalb kleiner Bereiche ebenfalls auf gewünschte Werte einstellen. Dies läßt sich besonders dadurch erreichen, wenn man zwei unterschiedliche Korngrößenbereiche wählt, wobei der Anteil des Korngrößenbereichs < 10µm zwischen 20 und 60 Gew.-% des gesamten Wolframpulvers ausmachen soll; der Rest des Wolframpulvers soll dann eine Korngröße zwischen 10 und 20 µm besitzen.The grain size of the tungsten used is generally less than 20 μm. By changing the grain size distributions, the burning times can also be set to the desired values within small ranges. This can be achieved in particular if two different grain size ranges are selected, the fraction of the grain size range <10 μm being between 20 and 60% by weight of the total tungsten powder; the rest of the tungsten powder should then have a grain size between 10 and 20 microns.

Die Herstellung der erfindungsgemäßen Sätze erfolgt auf an sich bekannte Weise. Die ungebundenen Sätze lassen sich durch gleichzeitige Vermischung der einzelnen Bestandteile herstellen. Bei Mitverwendung von Bindemitteln werden diese in einem geeigneten Lösungsmittel (z. B. Aceton) gelöst oder suspendiert und die übrigen Bestandteile in dieser Lösung oder Suspension dispergiert. Die dann erhaltene Dispersion wird anschließend weitgehend vom Lösungsmittel befreit, so daß man auf an sich bekannte Weise gut rieselfähige Körner herstellen kann, die dann zu den gewünschten Sätzen verpreßt werden.The sets according to the invention are produced in a manner known per se. The unbound sets can be made by simultaneously mixing the individual components. If binders are also used, these are dissolved or suspended in a suitable solvent (e.g. acetone) and the remaining constituents are dispersed in this solution or suspension. The dispersion obtained is then largely freed from the solvent, so that it is possible to produce free-flowing grains in a manner known per se, which are then compressed to the desired sets.

Die erfindungsgemäßen Sätze werden u. verwendet für Detonatoren und Anzündmittel mit Verzögerung und für Anzündverzögerer.The sentences according to the invention are u. used for delayed detonators and igniters and for ignition retarders.

Beispielexample

In eine Lösung von 2 Gewichtsteilen Nitrocellulose in 100 Gewichtsteilen Aceton wurden unter Rühren eingebracht: 24 Gewichtsteile Wolframpulver (Korngröße < 20 µm) 64 " Bariumchromat 12 " Kaliumperchlorat 4 " Bariumhexafluorosilikat 2 " pyrogene Kieselsäure (AerosilR). The following were introduced with stirring into a solution of 2 parts by weight of nitrocellulose in 100 parts by weight of acetone: 24 parts by weight Tungsten powder (grain size <20 µm) 64 " Barium chromate 12 " Potassium perchlorate 4 " Barium hexafluorosilicate 2 " fumed silica (Aerosil R ).

Nach intensivem Durchmischen wurde das Lösungsmittel abgedampft und rieselfähige Körner nach üblichen Verfahren hergestellt. Diese wurden in Ladungen schichtweise nacheinander in einen zylinderförmigen Körper verpreßt, wobei jede Ladung ca. 125 mg Satz enthielt und die gesamte Ladehöhe 10 mm betrug.After intensive mixing, the solvent was evaporated off and free-flowing granules were produced by customary methods. These were pressed one after the other in layers into a cylindrical body, each load containing approximately 125 mg set and the total loading height being 10 mm.

Die eingepreßten Verzögerungssätze wurden durch einen Anfeuerungssatz zur Zündung gebracht. Die Brennzeiten wurden bei den Temperaturen + 71 °C bzw. 20 °C bzw. - 54 °C mit und ohne Rotation gemessen. Die Ergebnisse gehen aus der folgenden Tabelle hervor: Temperatur [°C] Brennzeiten [sec/10 mm Ladesäule] ohne Rotation bei Rotation (17 000 U/min) + 71 12,5 15,5 + 20 13 16 - 54 15 18,5 The pressed-in delay sets were ignited by a firing set. The burning times were measured at temperatures + 71 ° C or 20 ° C or - 54 ° C with and without rotation. The results are shown in the following table: Temperature [° C] Burning times [sec / 10 mm charging station] without rotation with rotation (17,000 rpm) + 71 12.5 15.5 + 20 13 16 - 54 15 18.5

Claims (6)

  1. Delay charge with delay times in the range of seconds which is based on powdered metal tungsten, barium chromate and potassium perchlorate, characterised by an additional content of either
    a) barium hexafluorosilicate or
    b) calcium fluoride together with finely dispersed SiO₂ with specific surface of 100 to 500 m²/g.
  2. Delay charge according to Claim 1, characterised in that, when employing barium hexafluorosilicate, finely dispersed SiO₂ with a specific surface of 100 to 500 m²/g, is, furthermore, contained in the charge.
  3. Delay charge according to Claim 1 or 2, characterised by a content of 1 to 10 % by weight of barium hexafluorosilicate.
  4. Delay charge according to Claim 1, characterised by a content of 1 to 10 % by weight of calcium fluoride.
  5. Delay charge according to one of Claims 1 to 4, characterised in that finely dispersed SiO₂ is contained in amounts between 0.1 and 5.0 % by weight.
  6. Delay charge according to one of Claims 1 to 5, characterised in that the particle size of the tungsten is below 20 µm and in that 20 to 60 % by weight of the tungsten possesses a particle size below 10 µm.
EP89103961A 1988-03-12 1989-03-07 Delay charges with long delay time Expired - Lifetime EP0332986B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89103961T ATE93504T1 (en) 1988-03-12 1989-03-07 DELAY BLOCKS WITH LONG DELAY TIMES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808366 1988-03-12
DE3808366A DE3808366A1 (en) 1988-03-12 1988-03-12 DELAY SETS WITH LONG DELAY TIMES

Publications (2)

Publication Number Publication Date
EP0332986A1 EP0332986A1 (en) 1989-09-20
EP0332986B1 true EP0332986B1 (en) 1993-08-25

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Country Status (8)

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US (1) US4963204A (en)
EP (1) EP0332986B1 (en)
AT (1) ATE93504T1 (en)
DE (2) DE3808366A1 (en)
ES (1) ES2042830T3 (en)
IL (1) IL89570A (en)
NO (1) NO170006C (en)
TR (1) TR25308A (en)

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US8118956B2 (en) 2006-09-20 2012-02-21 Ael Mining Services Limited Manufacture of pyrotechnic time delay compositions

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RU2184105C2 (en) * 2000-08-03 2002-06-27 Открытое акционерное общество по производству взрывчатых материалов и пиротехники "Нитро-Взрыв" Pyrotechnical retarding composition
RU2185355C2 (en) * 2000-09-14 2002-07-20 Государственное унитарное предприятие "Научно-исследовательский институт полимерных материалов" Low-gas slow-burning compound
RU2200141C1 (en) * 2001-06-08 2003-03-10 Открытое акционерное общество по производству взрывчатых материалов и пиротехники "Нитро-Взрыв" Pyrotechnic retarding composition
RU2202525C2 (en) * 2001-07-04 2003-04-20 Федеральное государственное унитарное предприятие "Научно-исследовательский институт полимерных материалов" Pyrotechnic slow-burning composition
RU2213082C2 (en) * 2001-10-04 2003-09-27 Федеральное государственное унитарное предприятие "Научно-производственное предприятие "Краснознаменец" Thermoplastic pyrotechnical composite for elastic fuse eliciting big delaying times
RU2225385C2 (en) * 2002-02-14 2004-03-10 Российский Федеральный Ядерный Центр - Всероссийский Научно-Исследовательский Институт Экспериментальной Физики Pyrotechnic retarding composition
RU2230725C1 (en) * 2002-11-12 2004-06-20 Федеральное государственное унитарное предприятие "Муромский приборостроительный завод" Pyrotechnic retarding composition
RU2256638C1 (en) * 2004-02-24 2005-07-20 Федеральное государственное унитарное предприятие "Научно-исследовательский институт полимерных материалов" Retarding low-gas composition
RU2291141C1 (en) * 2005-08-29 2007-01-10 Алексей Викторович Думенко Retarding pyrotechnic compound (versions)
RU2332393C2 (en) * 2006-08-25 2008-08-27 ДУМЕНКО Виктор Иванович Retarding composition (versions)
CL2007002676A1 (en) * 2006-09-20 2008-02-22 African Explosives Ltd PROCESS TO PRODUCE PIROTECHNICAL DELAY COMPOSITION THAT INCLUDES OXIDIZING, COMBUSTIBLE, SURFACTANT AND LIQUID MIXING TO FORM A PASTA OR SUSPENSION, DRYING THE PASTA OR SUSPENSION TO ELIMINATE LIQUID AND GET A SOLID PRODUCT
CN104045496A (en) * 2014-07-03 2014-09-17 广东明华机械有限公司 Tungsten-based delay powder for detonator and use of tungsten-based delay powder
CN104987271A (en) * 2015-04-24 2015-10-21 安徽雷鸣科化股份有限公司 Large inner tube type long time delay
DE102015014821A1 (en) 2015-11-18 2017-05-18 Rheinmetall Waffe Munition Gmbh REACh-compliant pyrotechnic delay and ignition charge with variably adjustable performance parameters
RU2744583C1 (en) * 2020-07-19 2021-03-11 Акционерное общество «Муромец» Pyrotechnic retarding composition (variants)
CN114963528B (en) * 2021-06-29 2023-08-18 青岛海尔新能源电器有限公司 Refrigerant detection method, device, equipment and storage medium

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US3701697A (en) * 1971-05-27 1972-10-31 Us Navy Pressure compensated pyrotechnic time delay composition
US3726730A (en) * 1972-03-20 1973-04-10 Us Navy Pyrotechnic delay composition containing heavy metal soap
US4008109A (en) * 1975-07-01 1977-02-15 Chemincon Incorporated Shaped heat insulating articles
US4239004A (en) * 1976-07-08 1980-12-16 Systems, Science & Software Delay detonator device
FR2464932A1 (en) * 1979-09-06 1981-03-20 Poudres & Explosifs Ste Nale SLOW-SPEED, LOW-DIAMETER COMBUSTION SPEED
CA1132355A (en) * 1980-12-02 1982-09-28 Joseph E.G. Couture Peripheral burning incendiary device
DE8227583U1 (en) * 1982-10-01 1987-06-25 Bayern-Chemie Gesellschaft für flugchemische Antriebe mbH, 8261 Aschau Infrared light set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8118956B2 (en) 2006-09-20 2012-02-21 Ael Mining Services Limited Manufacture of pyrotechnic time delay compositions

Also Published As

Publication number Publication date
NO891040L (en) 1989-09-13
NO891040D0 (en) 1989-03-10
IL89570A (en) 1993-02-21
DE3808366A1 (en) 1989-10-05
US4963204A (en) 1990-10-16
NO170006C (en) 1992-09-02
NO170006B (en) 1992-05-25
ES2042830T3 (en) 1993-12-16
ATE93504T1 (en) 1993-09-15
EP0332986A1 (en) 1989-09-20
DE3808366C2 (en) 1990-02-08
DE58905351D1 (en) 1993-09-30
TR25308A (en) 1992-12-22

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