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A low-smoke pyrotechnic composition for producing colored flames

A composition and pyrotechnic technology, applied in the directions of nitrocellulose composition, ignition agent, offensive equipment, etc., can solve the problems of increasing the price of metal salts, harmful chemical precursors, unfriendly environment, etc., and achieve good burning speed and beautiful color pattern. , the effect of controlling the burning rate

Active Publication Date: 2010-03-24
CLEARSPARK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in some of these syntheses, environmentally unfriendly, toxic or harmful chemical precursors are required
These two issues significantly increase the price of metal salts with high nitrogen and low carbon content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A pyrotechnic composition according to the invention in the form of a red ultra-low smoke perchlorate-free explosive (code MZ5A) was prepared with the following composition: 100 g (94.79 wt%) nitrocellulose (NC) fibers, 13.5 wt% N , from Bergerac; 5.27 g (5 wt%) strontium aminotetrazolium (Sr-AT) synthesized by the inventors of the present invention; 0.22 g (0.21 wt%) NH 4 Cl, pro analysis, Merck KGaG, catalog number 1.01145.1000.

[0045] NCs were dried in a Heraeus oven at 45 °C for two days to remove all moisture. Sr-AT and NH 4 The Cl crystals were ground into a fine powder using a mortar and pestle to ensure a fine mixture. The Erlenmeyer flask was charged with 35.14 g of acetone and 50 g of ethanol. Stir the mixture until evenly combined. This solvent mixture was used to form a ratio of NC:acetone of 74:26.

[0046] Initially, half of the solvent mixture was added to 50 g of NC in a small S-blade mixer (IKA mixer). After 10 minutes, scrape off lumps on the m...

Embodiment 2

[0048] A pyrotechnic composition (code MZ6) prepared according to the invention and which is turquoise ultra-low smoke and free of perchlorate explosives has the following composition: 100 g (93.35 wt%) nitrocellulose, 13.5 wt% N, from Bergerac ; 5.26 grams (4.91wt%) of aminotetrazolium barium synthesized by the inventors of the present invention; 1.86 grams (1.74wt%) of NH 4 Cl, pro analysis, Merck KGaG. The composition was prepared in the same manner as described in Example 1 for the red ultra-low smoke non-perchlorate explosive mixture.

[0049] It will be apparent to those skilled in the art that the use of a Rosand rheometer to produce explosives on a laboratory scale (i.e. usually small scale batches) while at the same time allows the user to detect important important rheological parameters which are critical to It is critical for large-scale extrusion processes. A Theyson twin-screw extruder (co-rotating, self-scraping, 45 mm, 1305 screw length, 29 L / D) is a suitable...

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PUM

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Abstract

The present invention provides a chiorine-containing pyrotechnic composition which is substantially free of perchlorate which composition comprises a nitrocellulose which is derived from a fibrous nitrocellulose starting material that has at least partially been dissolved during the process of preparing the pyrotechnic composition, and a colourant. The invention further provides a firework article comprising said pyrotechnic composition, and a method for preparing the same.

Description

technical field [0001] The present invention relates to a pyrotechnic composition containing chlorine. Background technique [0002] Traditional colorful fireworks contain a large amount of metal salts and perchlorates to form the desired colors. Such fireworks impact the environment as a small percentage of unburned stars or flares contain perchlorate and may end up in drinking water. Another problem associated with known fireworks is the formation of large amounts of smoke, which causes serious problems in closed assembly places such as inner city stadiums. [0003] In US 6,214139 and US 5,917,146, various metal salts of high nitrogen, low carbon content energetic materials are presented as possible ingredients for low smoke fireworks compositions. [0004] However, the high-nitrogen and low-carbon content high-energy materials mentioned in these documents are compounds that are not readily available. To prepare these compounds, a multi-step synthesis is required. Furt...

Claims

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Application Information

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IPC IPC(8): C06C15/00
CPCC06C15/00C06B25/18
Inventor 鲁特格尔·韦布马蒂杰恩·泽布雷吉斯约翰·弗朗西斯库斯·塞文贝尔根穆尔克·彼得·范罗伊恩
Owner CLEARSPARK
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