DE1221946B - Process for the production of pyrotechnic light and signal sets - Google Patents

Description

Process for the production of pyrotechnic light and signal sets The present invention relates to a method for producing pyrotechnic Light and signal sets in appropriate ammunition by mixing the dry ones Flare components with a liquid polyester resin in the presence of curing catalysts and possibly also from stabilizers; the new and advanced of the invention is that that with the liquid polyester resin and catalyst - especially by spraying - mixed set mixtures at mechanical pressures of less than 500 kg / cm-2, especially of about 200 kg / cm2, is molded and hardened.

In contrast, there are the pressures with which one can produce these and similar compositions has pressed so far, around 1500 to 2000 kg / cm2. Of course, this means one very high technical effort, on the other hand, these high pressures only allow a relatively small volume fraction of particularly bright metals, because otherwise the application of the high pressures would be too dangerous.

The method mentioned at the beginning is supported by the present invention So not only simplified, but it also creates the possibility of particularly bright Produce sentences safely.

The preparation of the mixtures mentioned at the outset is known per se; Resins have also been proposed to be used for this purpose could. The weight proportion of these resins in the composition of the sentence should be less than 10%, preferably about 7 to 8%.

Cobalt naphthenate and cyclohexanone peroxide can be used as accelerators or catalysts can be used, the former of which is added to the resin at any one time can be, whereas the cyclohexanone peroxide only shortly before the processing of the Resin is added to this. It is preferable to use the starting components, e.g. B. Metal salts, metal powder and the like to be mixed dry and this mixture the liquid Finely divided synthetic resin to be added immediately before pressing. The spraying this synthetic resin has been found to be particularly advantageous.

As a stabilizer, the synthetic resin can be stabilized by butyl catechol Monostyrene can be added.

The synthetic resin settles in a particularly advantageous embodiment the invention composed of the following components: about 75% unsaturated polyester resin, about 24.85% butylcatechol stabilized monostyrene, about 0.25% of that Mixture of added cyclohexanone peroxide.

The following sets have proven to be particularly effective: 1. Red signal cartridge 26.5 mm flare set 5501, strontium nitrate, 22% magnesium, 15% polyvinyl chloride, 8% unsaturated synthetic resin. The procedure here is that 55% strontium nitrate, 22% magnesium and 15% polyvinyl chloride are dry mixed with one another.

In another operation, the resin is in a larger one Quantum of 75% polyester resin of the type mentioned, 24.85% stabilized monostyrene and 0.15 ° / a accelerator, such as. B. cobalt naphthenate prepared.

Smaller amounts of this synthetic resin is then immediately before the Addition to the dry composition of the composition 0.15% cyclohexanone peroxide as a catalyst added. The resin prepared in this way is added in fine doses, for example by spraying into the dry set mixture and mixing intimately for about 10 to 15 minutes.

After this mixing process, the sentence composition is filled into compression molds and pressed using a low pressure of about 200 kg / cm2.

The procedure for making the following sets is similar: Intermediate set 53 per cent barium nitrate, 20 per cent aluminum, 100 per cent silicon, 10 per cent nitrocellulose, 7% synthetic resin. 2. Green signal cartridge flare 65% barium nitrate, 10 per cent magnesium, 17 per cent highly chlorinated polyvinyl chloride, 8 per cent synthetic resin.

Intermediate sentence As in example 1.

3. White signal cartridge flare set 640 /, barium nitrate, 290/0 magnesium, 7% synthetic resin.

Intermediate sentence As in example 1.

4. Yellow light cartridge flare 58% sodium nitrate, 35% magnesium, 70 /,) synthetic resin.

Intermediate sentence _ _ As in example 1.

All sets are sulfur-free. In the drawing, the structure of an entire signal or light set is shown schematically. 1 means the outer cover, 2 the signal or flare set, 3 the intermediate set, 4 the lighting set and 5 a cover plate.

Claims (1)

Claim: Process for the production of pyrotechnic lighting and signal sets in corresponding ammunition by mixing the dry flare components with a liquid polyester resin in the presence of curing catalysts and optionally also of stabilizers, d u r c h marked that with the liquid Polyester resin together with catalyst - especially by spraying - mixed set mixture at mechanical pressures of less than 500 kg / cm2, especially of around 200 kg / cm2 and is hardened. Publications considered: German Patent Specifications No. 876 822, 727 865; German Auslegeschriften No. 1121986, 1092 828; Austrian U.S. Patent No. 213,755; British Patent Nos. 946 903, 883 586, 750 310, 588,671; French Patent Nos. 1,185,768,1 159,917; U.S. Patent No. 2,968,542.