DE102016120539A1 - An ignition material, in particular for use in an optical detonator and ignition means with such an ignition material - Google Patents

Abstract

The invention relates to an ignition material, in particular a photosensitive igniter substance, wherein according to the invention the photosensitive igniter substance has at least one transition metal complex with at least one alkyl-bridged ditetrazole ligand.

Description

The invention relates to an ignition material, in particular for use in an optical detonator and an ignition means with such an ignition material and is used in particular for uninterrupted ignition chains application.

Optical detonators are based on a two-stage mode of action. In a first stage, combustion is thermally triggered by a laser action, whereby a metal membrane such as a piston is pressed into a second region and there initiates combustion, which in turn triggers a striking effect.

Such a two-stage optical detonator, for example, in the EP 1 067 357 B1 described.

So far, as ignition or ignition material for optical detonators, which have operating times in the microsecond range, impact and friction-sensitive initial explosives or corresponding mixtures thereof used, for example BNCP. Due to their mechanical sensitivities, such initial explosives are not suitable for use in uninterrupted ignition chains (in-line detonators).

The object of the invention is therefore to provide an ignition material, in particular for use in an optical detonator, and an ignition device, in particular for use as an optical detonator, in which the said problems do not arise. In particular, the ignition material should have the mechanical sensitivities of a firing amplifier, be capable of being ignited or ignited by means of laser irradiation by means of a diode laser and have operating times in the microsecond range. Furthermore, the ignition material to be developed must have a sufficiently high output power to initiate a low-sensitivity, common secondary explosive, which is used as the main charge.

This object is achieved with the characterizing features of the first, fifth, eleventh and twelfth patent claim.

Advantageous embodiments emerge from the subclaims.

According to the invention, an ignition material, in particular a photosensitive igniter substance, according to the invention, the photosensitive igniter substance has at least one transition metal complex with at least one alkyl-bonded ditetrazole ligand.

The at least one transition metal complex preferably has scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper or zinc as the central metal. Further, the at least one transition metal complex preferably comprises an alkyl bridged (e.g., ethyl, propyl, butyl, pentyl, hexyl) ditetrazole ligand. The at least one transition metal complex also has a counterion, preferably selected from one of the following: perchlorate, chlorate, chloride, nitrate, nitrite, dinitramide, nitrocyanamide, trinitromethanide or cyanodinitromethanide.

Also according to the invention is an ignition means in which at least one inventive explosive is contained.

In particular, at least one DDT explosive is included in addition to the primer.

As the DDT explosive, a nitric acid ester of aliphatic polyols is preferably used. This is, for example, erythritol tetranitrate, pentaerythritol tetranitrate or mannitol hexanitrate.

The impact sensitivity of the inventive ignition means is at least 3J, while the friction sensitivity is preferably above 80N. The ignition means according to the invention can thus be classified as an ignition amplifier and replace BNCP as optical ignition material.

The ignition composition according to the invention preferably has at least one binder and one color-absorbing additive.

The binder used is preferably polyethylene and / or polytetrafluoroethylene.

The color-absorbing additive is in particular carbon black, graphite and / or milori blue.

Also according to the invention is the use of a primer according to the invention in an optical detonator.

Furthermore, according to the invention, the use of an inventive ignition means as an optical detonator.

Advantageously, the primer and the DDT explosive have mechanical sensitivities in the range of firing amplifiers / boost charges and thus can be used in an uninterrupted firing chain. Nevertheless, the corresponding optical detonators have ignition delay times / microsecond operating times and can therefore be used to initiate the main charge (a secondary explosive) in systems which are short and precise Function times need to be used. Such short ignition delay times are achieved, above all, by the use of transition-metal complexes with alkyl-bridged ditetrazol-1-yl ligands as optical (starting) igniters.

The detonator according to the invention contains no classical primary explosive / initial explosive and nevertheless has a high sensitivity to laser irradiation by means of diode laser and is able to initiate a secondary explosive.

The invention will be explained in more detail with reference to an embodiment and an associated drawings, without being limited to these.

• 1: einen alkylverbrückten Ditetrazol-1-yl-Liganden.

Showing:

• 1 : an alkyl-bridged ditetrazol-1-yl ligand.

In 1 An alkyl bridged ditetrazol-1-yl ligand is shown as it can be used in the transition metal complex of the primer according to the invention. It is 1,2-di (tetrazol-1-yl) ethane.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1067357 B1 [0003]

Claims (12)

An ignition material, in particular a photosensitive igniter substance, characterized in that the photosensitive igniter substance has at least one transition metal complex with at least one alkyl-bridged ditetrazole ligand. After ignition Claim 1 , characterized in that the at least one transition metal complex as the central metal preferably scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper or zinc. After ignition Claim 1 or 2 , characterized in that the at least one transition metal complex comprises an alkyl-bridged ditetrazol-1-yl ligand. Ignition substance according to one of Claims 1 to 3 , characterized in that the at least one transition metal complex has a counterion, preferably perchlorate, chlorate, chloride, nitrate, nitrite, dinitramide, nitrocyanamide, trinitromethanide or cyanodinitromethanide. Ignition means, characterized in that at least one ignition material according to one of Claims 1 to 4 is included. Ignition means after Claim 5 , characterized in that in addition to the primer at least one DDT explosive is included. Ignition means after Claim 6 , characterized in that is used as the DDT explosive nitric acid esters of aliphatic polyols. Ignition means according to one of Claims 5 to 7 at least comprising a binder and a color-absorbing additive. Ignition means after Claim 8 , characterized in that preferably polyethylene and / or polytetrafluoroethylene is used as a binder. Ignition means after Claim 8 or 9 , characterized in that as a color-absorbing additive preferably carbon black, graphite and / or Milori blue is used. Use of an ignition material according to one of Claims 1 to 4 in an optical detonator. Use of an ignition means according to one of Claims 5 to 10 as an optical detonator.

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