Smokeless propellant and preparation method thereof

Abstract

The invention relates to a smokeless propellant and a preparation method thereof. The propellant is composed of the following raw materials (by weight): 20-98 parts of nitrocellulose, 0-80 parts of ammonium perchlorate, 0.5-10 parts of ferrocene and 0.5-5 parts of polyvinyl butyral, wherein nitrogen content of the nitrocellulose is 11-12.5%. The preparation method comprises the following steps: 1,uniformly sieving nitrocellulose, ammonium perchlorate and polyvinyl butyral; dissolving ferrocene in ethanol, dichloromethane or a mixed solvent of ethanol and dichloromethane; dissolving the sievedraw material mixture in a prepared solution, pelletizing by a drum-type pelletizer or a screen method to prepare particles of 1-2 mm, and drying in the sun at normal temperature. During combustion offerrocene having the catalytic action, hydrogen chloride gas generated from an oxidizing agent ammonium perchlorate can be absorbed effectively, thereby greatly reducing irritating odor of the smokeless propellant with the ammonium perchlorate as the oxidizing agent and lowering pressure index of the smokeless propellant. Thus, the smokeless propellant has good safety, the combustion product is clean, and firework ornamental effect and security and environmental protection requirement are improved.

Description

technical field [0001] The invention is used for fireworks propellants, belongs to the field of fireworks and firecrackers manufacturing, and more specifically relates to a smokeless propellant and a preparation method thereof. Background technique [0002] With the development of society, propellants are indispensable in fireworks and fireworks, and are widely used in daily life and celebration activities. Most of the existing propellants are black powder, and their main components are potassium nitrate, sulfur, fir powder, etc. , which adopts the traditional manufacturing method and has been used for hundreds of years. The main working principle is to ignite the black powder through the fuse to generate upward power to push the fireworks cartridge into the air. The overall application effect is better, but there are still disadvantages such as easy to be affected by moisture, low safety performance, and easy to cause environmental pollution (its smog is relatively large). ...

AI Technical Summary

Problems solved by technology

However, the smoke volume of the propellant is still relatively large, the formula is complex, and the combustion products and wastes are large

[0005] And in China's invention patent application 201510674279.6 (disclosure date: February 17, 2016) discloses a formula and a preparation method of a coated nail-shooting ammunition tablet without firing powder, and its formula components and weight percentages are: nitrated Cellulose 89.80% ~ 99.78%, stabilizer 0.20% ~ 0.75%, binder 0.01% ~ 0.45%, coating material 0.01% ~ 3.0%, solvent ≤ 1.0%, moisture ≤ 5.0%; nitrocellulose containing water is used as The base material is gelled by adding water-containing nitrocellulose, solvent, stabilizer, and binder into the gelling kneader, and is mixed for a certain period of time to complete the gelation; then pressed into granules, and then dried by a tablet machine Shaped into tablets, and finally put the formed tablets into the coating pot for coating with coating materials, after drying them for the second time, the prepared nail ammunition tablets have excellent moisture resistance, which solves the problem of low drying efficiency and energy consumption in the prior art. High, large dust, easy to burn and explode, poor process safety and other issues

However, the manufacturing process is complicated and the economy is poor. At the same time, because the proportion of nitrocellulose components is more than 90%, its combustion pressure index is relatively large, and its emission stability is poor. It is not suitable for the charge of fireworks and combined fireworks.