A pyrotechnic colour composition

Abstract

The invention provides a chlorine-containing pyrotechnic composition which comprises a binder, an oxidator, a pyrotechnic fuel, and a colourant comprising a metal salt of 5-aminotetrazole. The invention further relates to a firework article comprising such a pyrotechnic composition. In addition, the invention provides a method for preparing said colourant.

Description

technical field

[0001] The present invention relates to a pyrotechnic composition containing 5-aminotetrazolium salt, preferably a pyrotechnic composition (fireworks composition) containing 5-aminotetrazolium salt. Background technique

[0002] Traditional colored fireworks have the major disadvantage that they produce a large amount of smoke which causes serious problems in closed assembly places such as inner city stadiums.

[0003] In US 6,214,139 and US 5,917,146 various metal salts of high nitrogen, low carbon content energetic materials are proposed as viable ingredients for low smoke fireworks compositions.

[0004] However, the high nitrogen, low carbon content energetic materials mentioned in these documents are not readily available compounds. To prepare these compounds, multi-step syntheses are required. Furthermore, in some of these syntheses, environmentally unfriendly, toxic or harmful chemical precursors are required. These two problems have significantly i...