JPH042879B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to improvements in compositions for fireworks.

[Prior Art] As a composition for fireworks, Patent No. 1291249, which the present applicant has already obtained as a patent, is known.
This composition for fireworks can be prepared by adding and mixing metaldehyde and known flame coloring agents and pyrotechnic agents to form granules, rods, or rings, or by adding a binder to the mixture and kneading it into paper, iron wire, bamboo wire, etc. It is painted or welded to a rod-like or arbitrary shape, or it is packed into a pipe such as a paper tube and formed into a rod-like body. By igniting and burning these firework compositions,
The colored light is something to admire.

[Problems to be Solved by the Invention] However, even if the above-mentioned conventional firework compositions exhibit the desired beautiful color flame immediately after ignition due to their composition, as the combustion temperature increases, the composition deteriorates. When the sublimation combustion increases and the flame increases, there is a problem in that an extremely common pale yellow flame is produced in the center or upper half of the flame, which reduces the ornamental value of the colored flame. In addition, near the final stage of combustion, immediately after the fire power weakens and the flame goes out, residual heat sublimates a small amount of unburnt material, and mainly metal aldehyde becomes floating in the form of fluff, and becomes floating. There was a problem with providing pleasure.

The present invention was made to solve the above-mentioned conventional problems, and suppresses the pale yellow flame generated during combustion and the sublimated floating hairs generated in the final stage of combustion, and at the same time increases the amount of sparks generated. The purpose of the present invention is to provide a composition for fireworks that allows the viewing of beautiful colored flames.

[Means for Solving the Problems] The present invention is a fireworks composition characterized in that copper sulfate is blended into a mixture of metaldehyde and at least one of a flame coloring agent and a fireworks agent.

Examples of the flame coloring agent include strontium carbonate, strontium chloride, strontium oxalate,
Examples include strontium nitrate, lithium carbonate, lithium chloride, calcium carbonate, copper carbonate, copper oxalate, potassium borate, potassium gluconate, cesium carbonate, cesium hydroxide, barium carbonate, barium nitrate, and antimony trisulfide.

Examples of the above-mentioned pyrotechnic agents include magnesium, zirconium, and the like.

The mixing ratio of metaldehyde and at least one of a flame coloring agent and a pyrotechnic agent in the above mixture may be in the range of 50 to 99% by weight of metaldehyde and 1 to 50% by weight of at least one of a flame coloring agent and a pyrotechnic agent. desirable.

The amount of copper sulfate added to the above mixture is 1 to 40 parts by weight, preferably 10 parts by weight, based on 100 parts by weight of the mixture.
A range of ~20 parts by weight is desirable. The reason for this is that if the amount of copper sulfate is less than 1 part by weight, it will be difficult to sufficiently suppress the pale yellow flame produced during combustion and the sublimated floating hairs produced in the final stage of combustion. This is because if the amount exceeds 40 parts by weight, flammability may decrease.

Note that an oxidizing agent such as potassium perchlorate or a binder may be added as necessary.

[Function] According to the present invention, by adding copper sulfate to the mixture of metaldehyde and at least one of a flame coloring agent and a pyrotechnic agent, the pale yellow flame generated during the color flame and the final stage of combustion are reduced. The generation of sublimation floating hairs can be suppressed, and at the same time, the amount of sparks generated can be increased, so you can enjoy beautiful fireworks. Copper sulfate also acts as a flame coloring agent, such as blue-green.

[Embodiments of the Invention] Examples of the present invention will be described in detail below. Note that % in the examples means % by weight.

Example 1 A fireworks composition was prepared by blending 8.5 parts by weight of 60 mesh copper sulfate powder with 100 parts by weight of a mixture having the following component ratios.

〔blend〕

Metaldehyde...80% Strontium carbonate...12% Lithium carbonate...5% Calcium carbonate...1% Magnesium...2% Comparative Example 1 A fireworks composition was prepared only from a mixture having the same component proportions as in Example 1 above.

The firework compositions of Example 1 and Comparative Example 1 were then press solidified, and these solids were ignited. As a result, in the case of the fireworks composition of Comparative Example 1, a red flame was generated, but as the combustion increased, a pale yellow flame was generated in about 50% of the center of the flame, spoiling the aesthetic appearance, and at the same time, the final stage of combustion Immediately after burning out, sublimated floating hairs containing mainly metaldehyde were generated, causing discomfort. On the other hand, in the case of the fireworks composition of Example 1, no pale yellow color was observed in the flame due to increased combustion, and the amount of sparks generated was large.
What's more, there were no sublimation floating hairs that appeared immediately after the flame was completely burnt out, and we were able to enjoy the beautiful red flame.

Example 2 A fireworks composition was prepared by adding 15 parts by weight of 60 mesh copper sulfate to 100 parts by weight of a mixture having the following component ratios.

〔blend〕

Metaldehyde...85% Strontium chloride...10% Strontium oxalate...3% Magnesium...2% Comparative Example 2 A fireworks composition was prepared only from a mixture having the same component proportions as in Example 2 above.

The firework compositions of Example 2 and Comparative Example 2 were then press-solidified, and these solids were ignited. As a result, in the case of the fireworks composition of Comparative Example 2, a bright red flame was generated, but as the combustion increased, a pale yellow flame was generated in about 60% of the center of the flame, which significantly impaired the aesthetic appearance. Immediately after the final stage of combustion, sublimated floating hairs containing mainly metaldehyde were generated, causing discomfort. In contrast, this Example 2
In the case of this fireworks composition, no light yellow color was observed in the flame due to increased combustion, the amount of sparks was increased, and there were no sublimation floating hairs immediately after the fireworks were burned out, resulting in a beautiful true flame. I was able to see red flames.

Example 3 A fireworks composition was prepared by adding 5 parts by weight of 60 mesh copper sulfate to 100 parts by weight of a mixture having the following component ratios.

〔blend〕

Metaldehyde...89% Cesium hydroxide...6% Copper oxalate...2.5% Potassium borate...2% Zirconium...0.5% Comparative Example 3 A fireworks composition was prepared only from a mixture having the same component proportions as in Example 3 above.

The firework compositions of Example 3 and Comparative Example 3 were then press solidified, and these solids were ignited. As a result, in the case of the fireworks composition of Comparative Example 3, a blue flame was generated in the initial stage after ignition, but as the combustion increased, the upper half of the flame (about 60%)
A pale yellow flame was generated, which seriously damaged the aesthetic appearance, and immediately after the final stage of combustion, sublimated floating hairs, mainly made of metaldehyde, were generated, causing discomfort. On the other hand, in the case of the fireworks composition of Example 3, no pale yellow color was observed in the flame due to increased combustion, and the amount of sparks generated was large, and furthermore, immediately after the fireworks were burned out, sublimation and floating occurred. There were no hairs, and I was able to admire the beautiful, transparent blue flames.

Example 4 A fireworks composition was prepared by adding 2 parts by weight of 60 mesh copper sulfate to 100 parts by weight of a mixture having the following component ratios.

〔blend〕

Metaldehyde...95% Barium sulfate...3.5% Magnesium...1% Soda carbonate...0.5% Comparative Example 4 A fireworks composition was prepared only from a mixture having the same component proportions as in Example 4 above.

The firework compositions of Example 4 and Comparative Example 4 were then press solidified, and these solids were ignited. As a result, although the firework composition of Comparative Example 4 exhibited a beautiful yellow-green flame, immediately after the final stage of combustion, sublimated floating hairs containing mainly metaldehyde were generated, giving an unpleasant feeling. On the other hand, in the case of the fireworks composition of Example 4, there was no discomfort due to the generation of sublimation floating hairs immediately after the fireworks burned out, and beautiful yellow-green flames could be seen.

Example 5 A fireworks composition was prepared by adding 11 parts by weight of 60 mesh copper sulfate to 100 parts by weight of a mixture having the following component ratios.

〔blend〕

Metaldehyde...85% Lithium chloride...4.3% Cesium hydroxide...8% Copper carbonate...2.7% Comparative Example 5 A fireworks composition was prepared using only a mixture having the same component proportions as in Example 5 above.

The firework compositions of Example 5 and Comparative Example 5 were then press-solidified, and these solids were ignited. As a result, although the firework composition of Comparative Example 5 exhibited a purple flame, immediately after the final stage of combustion, sublimated floating hairs containing mainly metaldehyde were generated, giving an unpleasant feeling. In contrast, this Example 5
In the case of the fireworks composition, there was no discomfort due to the generation of sublimation floating hairs immediately after the fireworks burned out, and it was possible to enjoy the beautiful transparent purple flames.

Example 6 A fireworks composition was prepared by adding 4 parts by weight of 60 mesh copper sulfate to 100 parts by weight of a mixture having the following component ratios.

〔blend〕

Metaldehyde...78% Potassium borate...4.7% Potassium gluconate...4% Strontium nitrate...5% Potassium perchlorate...3.3% Binder...5% Comparative example 6 Fireworks made only from a mixture with the same component proportions as in Example 6 above A composition was prepared.

Then, the firework compositions of Example 6 and Comparative Example 6 were applied to iron wire, respectively, and these coatings were ignited. As a result, in the case of the fireworks composition of Comparative Example 6, the bottom and outer ring of the flame were pink, but as the combustion increased, a pale yellow flame was generated in the center of the flame, spoiling the aesthetic appearance. Immediately after the final stage of combustion, some sublimated floating hairs appeared, causing discomfort. On the other hand, in the case of the fireworks composition of Example 6, no pale yellow color was observed in the flame due to increased combustion, and the amount of sparks generated was large. There were no hairs, and I was able to admire the beautiful transparent pink flames.

Example 7 A fireworks composition was prepared by adding 1.5 parts by weight of 60 mesh copper sulfate to 100 parts by weight of a mixture having the following component ratios.

〔blend〕

Metaldehyde...84% Antimony trisulfide...7% Barium nitrate...2% Titanium...0.2% Cesium carbonate...1.8% Binder...5% Comparative Example 7 A fireworks composition was prepared from only a mixture having the same component proportions as in Example 7 above. did.

Then, the fireworks compositions of Example 7 and Comparative Example 7 were applied to iron wire, respectively, and these coatings were ignited. As a result, although the firework composition of Comparative Example 7 exhibited a white flame, a small amount of sublimated floating hairs mainly composed of metaldehyde were generated immediately after the final stage of combustion, giving an unpleasant feeling. On the other hand, in the case of the firework composition of Example 7, there was no generation of sublimation floating hairs immediately after the fireworks were burned out, and there was no discomfort caused by them, and beautiful white flames could be observed.

In the above embodiments, the fireworks composition was pressed and solidified, or when a binder was added, it was applied to the iron wire, but the present invention is not limited thereto. For example, in the case of a fireworks composition containing a binder, the same effect can be obtained by applying or welding it to paper or bamboo wire, or by filling it into a pipe such as a paper tube and forming it into a rod. It can be achieved.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to suppress pale yellow flames generated during combustion and sublimated floating hairs generated in the final stage of combustion, and at the same time increase the amount of sparks generated, which in turn reduces discomfort. It is possible to provide a composition for fireworks that does not cause any color and allows the viewer to enjoy extremely beautiful colored flames.

Claims (1)

[Claims] 1. A composition for fireworks, characterized in that copper sulfate is blended into a mixture of metaldehyde and at least one of a flame coloring agent and a pyrotechnic agent.