Classifications

• • C—CHEMISTRY; METALLURGY
  • C06—EXPLOSIVES; MATCHES
  • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
  • C06C9/00—Chemical contact igniters; Chemical lighters
• • 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

Definitions

• the present invention relates to an ignition means for propellant powders, as well as its use.
• Cartridges filled with propellant powders are mainly used in the civil sector, in particular in setting bolt devices or for stunning cattle.
• the cartridges may be formed of metal or plastics material.
• the propellant powder is normally ignited by a mechanically or electrically initiated reaction of an ignition charge consisting of at least one primary explosive material. A reliable ignition is thereby generally ensured.
• An object of the present invention was accordingly to provide an ignition means for propellant powders that does not have these disadvantages.
• the ignition means according to the invention is essentially concerned with a material for propellant powders that is free of primary explosive and that contains at least one oxidising agent, at least reducing agent and at least one binder.
• the ignition means according to the invention generates, on combustion, particles that ignite the propellant powder.
• the ignition means according to the invention may be used for example for reliable ignition of propellant powders contained in cartridges that are used for example in bolt setting devices.
• a propellant powder derived from cellulose nitrate may for example be used.
• the propellant powder may however also consist of components that are used for example in propellant powders that generate low CO content reaction gases (for example so-called SINCO® propellant powders).
• SINCO® propellant powders Reference may be made in this connection to EP 0 809 616 A1.
• Such cartridges are described for example in DE 198 24 122 A1.
• the cartridges may be sealed by a foil, for example of aluminium.
• the present invention provides the possibility of treating such sealing foils with the ignition means according to the invention so that, after appropriate initiation, they can act as an ignition means for the propellant powder.
• the foil for example an aluminium foil
• the ignition means according to the invention is coated on the inside of the cartridge with the ignition means according to the invention, dried and then applied, for example by adhesion, to the cartridge filled with propellant powder. If the cartridge covering is now rapidly heated externally, for example by an electric discharge, the aluminium can react with the applied components with the formation of self-combusting particles that ignite the propellant powder.
• the invention accordingly also provides coatings that can be applied to foils and that on combustion produce particles that can ignite the propellant powder, as well as the foils coated with the ignition means according to the invention.
• the ignition means according to the invention may consist of the following components or mixtures of these components:
• binders there may for example be used:
• Cellulose nitrate cellulose as well as its derivatives such as cellulose acetate, cellulose butyrate, cellulose acetobutyrate, polyvinylbutyrals, polyvinylbutyrates, polynitropolyphenylene or polynitropolyphenyl ether, as well as their mixtures.
• oxidising agents there may for example be used:
• Nitrates of alkali or alkaline earth elements or of ammonium for example sodium nitrate, potassium nitrate or ammonium nitrate, perchlorates of alkali or alkaline earth elements or of ammonium, peroxides of alkaline earth elements or of zinc, for example zinc peroxide, or their mixtures.
• reducing agents there may for example be used:
• Aluminium titanium, titanium hydride, boron, boron hydride, zirconium, zirconium hydride, graphite or carbon black, as well as their mixtures.
• stabilisers there may for example be used components known to be effective in the thermal decomposition of nitric acid esters, for example urea derivatives such as Centralite or Akardite.
• combustion moderators there may for example be used ferrocene and its derivatives or oxidising agents that pass through various oxidation states.
• additives there may for example be used energy-rich substances in order to improve the combustion, energy and thermal stability of the applied coating.
• Such additives are secondary explosives such as for example Octogen, Hexogen, etc..
• the amount of the individual components is governed substantially by the respective intended use.
• the oxidising agent may preferably be used in an amount of 5 to 50 wt. %, the reducing agent preferably in an amount of 5 to 50 wt. % and the binder preferably in an amount of 1 to 40 wt. %. It is particularly preferred to use the oxidising agent in an amount of 10 to 40 wt. %, the reducing agent in an amount of 10 to 40 wt. % and the binder in an amount of 5 to 20 wt. %.
• the addition of stabilisers, combustion moderators and other additives is also governed by the respective intended use. The nature and the amount can readily be determined.
• the production of the ignition means according to the invention is carried out by methods known per se, for example by mixing the component and applying the latter by coating or also by silk-screen printing.
• the coatings may be prepared as follows:
• the binder specified according to the invention is dissolved in a suitable solvent known per se, preferably methyl acetate, and the individual components are added while stirring.
• a suitable solvent known per se, preferably methyl acetate
• the amount of solvent is governed by the laboratory method and the required viscosity.
• Component Example 1 Example 2
• Example 3 Cellulose nitrate 20 wt. % 20 wt. % Cellulose acetate 20 wt. % Zirconium 40 wt. % 30 wt. % Titanium 40 wt. % Potassium nitrate 40 wt. % 30 wt. % Zinc peroxide 50 wt. % 10 wt. %

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Crystallography & Structural Chemistry (AREA)
• Paints Or Removers (AREA)
• Air Bags (AREA)
• Cosmetics (AREA)
• Manufacturing Of Micro-Capsules (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Inks, Pencil-Leads, Or Crayons (AREA)
• Joints Allowing Movement (AREA)
• Crushing And Pulverization Processes (AREA)
• Ignition Installations For Internal Combustion Engines (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=7931327

Family Applications (2)

Family Applications After (1)

Country Status (6)

Cited By (2)

Families Citing this family (4)

Family Cites Families (16)

• 2000
  • 2000-12-04 US US10/130,885 patent/US20030034103A1/en not_active Abandoned
  • 2000-12-04 AT AT00987340T patent/ATE425131T1/de active
  • 2000-12-04 DE DE10060320A patent/DE10060320A1/de not_active Withdrawn
  • 2000-12-04 DE DE50015593T patent/DE50015593D1/de not_active Expired - Lifetime
  • 2000-12-04 EP EP00987340A patent/EP1242338B1/de not_active Expired - Lifetime
  • 2000-12-04 WO PCT/EP2000/012169 patent/WO2001040144A2/de active Application Filing
• 2002
  • 2002-05-31 ZA ZA200204385A patent/ZA200204385B/xx unknown
• 2006
  • 2006-01-10 US US11/328,840 patent/US8147627B2/en not_active Expired - Fee Related

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