Classifications

• • 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
  • C06B45/14—Compositions or products which are defined by structure or arrangement of component of product having contiguous layers or zones a layer or zone containing an inorganic explosive or an inorganic explosive or an inorganic thermic component
• • 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
  • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
  • C06C9/00—Chemical contact igniters; Chemical lighters

Definitions

• the invention relates to finely graded primers for ⁇ nündsch and ignition elements.
• igniters and igniters are essentially determined by two factors.
• the reaction products should be rich in particles if possible and these particles should be as hot as possible
• a transport gas must be provided for the particles so that the particles penetrate the propellant charge as well as possible.
• the transport gas should also have a correspondingly high temperature in order to maintain the particle temperature.
• the object of the present invention was to provide ignition means and ignition elements, hereinafter referred to as ignition elements for short, which, in addition to a sufficient output, have finely variable values for the sensitivity to ignition and the sensitivity to ignition, without significantly impairing the ignition delay time.
• this object was achieved by the provision and combination of two ignition charges which differ in their properties.
• the 1st priming charge the so-called glow wire set
• the 2nd priming charge the so-called power set
• This heat-dissipating additive is selected from substances which are known to absorb heat and thereby remove heat from the environment. Examples of such substances can be inorganic or also be organic in nature, such as metals, metal compounds or organometallic compounds.
• metals or metal compounds are provided according to the invention as heat-dissipating components.
• Zirconium, aluminum, titanium and / or ferrotitanium are preferably used as metals.
• Zircon is particularly preferred.
• borides and hydrides of the metals mentioned can be used as metal compounds.
• Zirconium boride and zirconium hydride are particularly preferred.
• the glow wire sets of the ignition elements according to the invention contain at least one initial explosive, for example lead azide, diazodinitrophenol, silver azide, tricinate or pikrat, preferably lead picrat, and an oxidizing agent, such as alkali metal or alkaline earth metal nitrate, chlorates, for example.
• -perchlorates preferably KCIO3 and / or KCIO, particularly preferably KC10 «and a binder.
• the binder is not only responsible for the connection of the individual components, but also for the temperature resistance of the ignition elements; they should have a temperature resistance of> 85 ° C.
• Binders suitable according to the invention are therefore polyvinyl acetate, polysulfone or polyether sulfone. Polyvinyl acetate is preferably used. While the heat-dissipating additive is intended to increase sensitivity to ignition, the initial explosive used is responsible for ensuring the necessary sensitivity to ignition. Glow wire sets of the first embodiment suitable according to the invention are composed of 20 to 80 parts of initial explosive, preferably lead picrate, 20 to 80 parts of a mixture of heat-dissipating additive and oxidizing agent and 1 to 6 parts of binder. The mi The mixture of heat-dissipating additive and oxidizing agent is composed of 60 to 90 parts of heat-dissipating additive and 10 to 40 parts of oxidizing agent.
• a heat-dissipating initial explosive preferably silver azide
• other heat-dissipating components such as metals, metal compounds or organometallic compounds
• zirconium, aluminum, titanium and / or ferrotitanium can also be used as metals
• borides and hydrides preferably zirconium boride and zirconium hydride
• the particular advantage in the use of silver azide is that it also acts as a heat-dissipating additive and improves the sensitivity to ignition as an initial explosive.
• the glow wire set consists of 100 parts of silver azide and 1 to 6, preferably 4 parts of binder. Polyvinyl acetate is preferably used as the binder with the same functions as in the first embodiment.
• the power set according to the invention consists of a component which produces hot reaction particles, one of the abovementioned oxidizing agents and one of the said binders.
• Zircon in its various crystal modifications, titanium or mixtures thereof, is suitable as a constituent which produces hot reaction particles.
• KCIO3 and / or KCIO, preferably KC10 can be used as the oxidizing agent.
• Power sets which are suitable according to the invention are composed of 30 to 80 parts of zirconium, titanium or mixtures thereof, 20 to 70 parts of oxidizing agent, preferably KClO and 1 to 6 parts of binder.
• a mixture of 60 parts of zircon, 40 parts of KC104 and 4 parts of polyvinyl acetate is preferably used.
• the primers according to the invention can be used alone or in combination in a variety of ways. If the glow wire set according to the invention is combined with the power set according to the invention, then finely graduated ignition elements result.
• the ignition elements according to the invention are produced, for example, as follows.
• the constituents of the incandescent wire set and the power set are sieved and suspended in the binder dissolved in a suitable solvent. If polyvinyl acetate is used as the binder, butyl acetate is a suitable solvent.
• This slurry is made submersible, ie the viscosity is adjusted accordingly. It is particularly important that the components do not sedate during the immersion.
• the primer sludge for example, is homogenized under careful precautions by careful stirring. Ignition elements are generally made in the form of squibs.
• a common squib consists, for example, of two electrically conductive, elongated pole supports (lamellae), which are connected by means of an insulating web, and a glow plug connecting the pole supports.
• the base body is immersed several times in the primer slurry so that the first primer encloses the glow plug. The dipping process is repeated until the amount of glow wire set mixture sufficient for the respective application is applied. Quantities of 6 to 10 mg have proven useful for the first primer. Between the individual dives, the solvent is given the opportunity to evaporate. After the glow wire set, the power set is applied in the same way as a sheath around the glow wire set. For this set, too, the dive is repeated until the amount of power set mixture sufficient for the respective application is applied. 50 to 100, preferably 65 to 85 mg have proven useful as the primer weight for the entire primer. After the squib has been dried for 24 h, the squib is coated with a 20% lacquer from the respective binder and again dried for 48 h.
• the primers according to the invention can be used in the case of ignition elements resistant to high temperatures. If polysulfone or polyether sulfone is used as the binder, for example, the primers according to the invention can be used at temperatures of up to 250 ° C.
• the ignition elements according to the invention are very particularly suitable for igniting propellant charges that require long exposure times with a hot flame, and for insensitive propellant charges in which hot metallic particles are required.
• the primer mixtures specified in Table 1 are intended to explain the invention in more detail, but without restricting it.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Crystallography & Structural Chemistry (AREA)
• Air Bags (AREA)
• Automotive Seat Belt Assembly (AREA)
• Inks, Pencil-Leads, Or Crayons (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Closures For Containers (AREA)
• Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
• Compositions Of Macromolecular Compounds (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (11)

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• 1995
  • 1995-09-12 EP EP01103794A patent/EP1110928A1/de not_active Withdrawn
  • 1995-09-12 JP JP8509904A patent/JPH10505573A/ja active Pending
  • 1995-09-12 WO PCT/EP1995/003589 patent/WO1996008454A1/de active IP Right Grant
  • 1995-09-12 CZ CZ0070797A patent/CZ296695B6/cs not_active IP Right Cessation
  • 1995-09-12 DE DE19533487A patent/DE19533487A1/de not_active Withdrawn
  • 1995-09-12 KR KR1019970701762A patent/KR100407715B1/ko not_active IP Right Cessation
  • 1995-09-12 AT AT95932725T patent/ATE210619T1/de not_active IP Right Cessation
  • 1995-09-12 DE DE59509947T patent/DE59509947D1/de not_active Expired - Lifetime
  • 1995-09-12 PL PL95319093A patent/PL181960B1/pl not_active IP Right Cessation
  • 1995-09-12 EP EP95932725A patent/EP0781260B1/de not_active Expired - Lifetime

Patent Citations (11)

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