CN107793280B

CN107793280B - Composite type insensitive agent for firework powder

Info

Publication number: CN107793280B
Application number: CN201711178649.2A
Authority: CN
Inventors: 杜伯武
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-23
Filing date: 2017-11-23
Publication date: 2021-01-29
Anticipated expiration: 2037-11-23
Also published as: CN107793280A

Abstract

The invention discloses a composite type desensitizer for fireworks and crackers pyrotechnic composition, which consists of magnesium oxide, calcium stearate, bismuth trioxide, dicyclopentadiene iron and phthalic anhydride. The use of sulfur and barium nitrate in the pyrotechnic composition of the traditional fireworks and crackers is cancelled, so that the burning pollution is reduced; potential safety hazards are reduced; the friction impact sensitivity of the pyrotechnic composition is greatly reduced; the pyrotechnic composition has slow burning speed, and can only gradually burn after being ignited without being in a tightly closed environment, and can not instantaneously generate violent explosion to form strong shock waves. Accidents in the firework production process are effectively avoided; the bright beads can not be burnt and exploded due to high temperature in the baking process; the problem of the frying cylinder can be solved by the propellant powder, and the propellant force is improved; the pyrotechnic composition has good explosive-starting force and strong power-doing capability, and the explosive-starting effect can meet the technical requirements of explosive starting, bright bead or propellant powder and the like.

Description

Composite type insensitive agent for firework powder

Technical Field

The invention belongs to the technical field of fireworks and firecrackers, and particularly relates to a insensitive agent for pyrotechnic compositions.

Background

In the prior art, the common components of the fireworks and firecrackers, such as explosive, propellant powder, bright bead and the like, comprise sulfur, alloy, aluminum powder, barium nitrate and the like. Wherein the alloy is easy to ferment and heat under a humid environment to cause spontaneous combustion; barium nitrate is easy to deliquesce; the ignition temperature of the prepared finished explosive is low, the friction impact sensitivity is extremely high, and slight friction impact or spark sputtering can generate violent explosion. Meanwhile, the existing explosive has a large proportion of sulfur and serious environmental pollution.

Disclosure of Invention

In order to solve the defects, the invention aims to provide the insensitive agent for the firework explosive of the fireworks, which replaces the use of sulfur and barium nitrate, improves the safety coefficient of the firework explosive and reduces the environmental pollution. In order to solve the technical problems, the technical scheme adopted by the invention is that the composite type desensitizer for the firework powder is characterized by comprising magnesium oxide, calcium stearate, bismuth trioxide, dicyclopentadiene iron and phthalic anhydride.

In the above technical scheme, the magnesium oxide (chemical formula: MgO) is an oxide of magnesium. It is a white solid at normal temperature. The existing application in the field of fireworks is only used for blocking and sealing the opening of a firework cylinder as a mud bottom substitute (river sand, magnesium chloride and magnesium oxide are used in a matching way and are commonly called as mouth tightening agent and fixing primer). Magnesium oxide is used as the main body of the desensitizer in the present invention. The calcium stearate is softened, melted, dispersed and distributed in the pyrotechnic composition after being heated, blocks and absorbs heat, reduces the reaction speed, and is used as a flame retardant in the invention. The bismuth trioxide absorbs heat through decomposition to retard flame, and also serves as a flame retardant in the present invention. Dicyclopentadienyl iron, also known as ferrocene, is used in the present invention as a catalyst to achieve complete combustion of the pyrotechnic composition. The phthalic anhydride, also called phthalic anhydride, is used as a blending agent in the invention to fully melt and react all components of the pyrotechnic composition.

The components are fully stirred and filtered according to a proper proportion to prepare the impurity-free composite type desensitizer product. The manufacturer can prepare insensitive firework and firecracker explosive, propellant powder or low-sensitivity and high-stability bright beads by automatically mixing with aluminum powder, alloy, potassium perchlorate and other components according to the setting-off effect requirement and the known technical requirement.

Preferably, the composite desensitizer comprises the following components in parts by weight: 40-60 parts of magnesium oxide, 5-10 parts of calcium stearate, 1-5 parts of bismuth trioxide, 10-15 parts of dicyclopentadiene iron and 5-10 parts of phthalic anhydride. Further meets the requirements of the stability and the blasting performance of the pyrotechnic composition.

The invention has the beneficial effects that:

1: the use of sulfur in the pyrotechnic composition of the traditional fireworks and crackers is cancelled, so that the pollution to the environment after the fireworks and crackers are set off is reduced;

2: the use of barium nitrate in the pyrotechnic composition of the traditional fireworks and crackers is cancelled, and the potential safety hazard to the composition caused by environmental change is reduced;

3: the friction impact sensitivity of the firework powder prepared by the composite insensitive agent provided by the invention is greatly reduced, and the stability is practically guaranteed;

4: the firework powder prepared from the composite type insensitive agent provided by the invention has slow burning speed, and can only gradually burn after being ignited without being in a tightly closed environment, and can not instantaneously generate violent explosion to form strong shock waves. Accidents in the firework production process are effectively avoided;

5: the firework bright bead prepared by the composite insensitive agent provided by the invention can avoid spontaneous combustion of the bright bead due to fermentation and temperature rise in a humid environment, can improve the ignition temperature of the bright bead, and cannot cause combustion explosion due to high temperature in the baking process;

6: the sulfur-free propellant prepared by the composite insensitive agent provided by the invention can solve the problem of cylinder explosion and improve the launching force;

7: the pyrotechnic composition prepared by the composite insensitive agent provided by the invention has good explosive-starting strength and strong work-doing capability, and the explosion-starting effect can meet the technical requirements of explosive starting, bright bead or propellant powder and the like.

The present invention will be described in detail with reference to specific embodiments.

Detailed Description

Example 1: a composite insensitive agent for fireworks and crackers pyrotechnic composition comprises the following components in parts by weight: 40 parts of magnesium oxide, 5 parts of calcium stearate, 1 part of bismuth trioxide, 10 parts of dicyclopentadiene iron and 5 parts of phthalic anhydride. Weighing the components according to the proportion, fully stirring and sieving to obtain a 120-mesh impurity-free passivator product.

Examples 2-5, which differ from example 1 in the proportions of the components, are given in the following table:

the composite insensitive agent prepared by the above embodiments can be compounded by manufacturers according to the effect requirements to prepare passivated fireworks and crackers explosive, propellant powder and low-sensitivity high-stability bright beads. Such as:

opening an explosive: according to the parts by weight, the composite desensitizer comprises the following components: aluminum powder: the potassium perchlorate is prepared according to the proportion of 10:10:20 and is mixed evenly according to the general method. The explosive prepared by the composite type insensitive agent is loaded with 3.6g of explosive in equal amount with the traditional explosive under the condition of 12g of bright beads in the inner cylinder device, the diameter of the explosion breadth is 15-20 m, and the explosion breadth reaches the standard.

Propellant powder: according to the parts by weight, the composite desensitizer comprises the following components: and (3) potassium perchlorate: charcoal powder and flute tone agent 10: 40: preparing at a ratio of 20:40, and uniformly mixing according to a common method. Under the same working condition, the dosage of the traditional military mirabilite of the product with the same specification is 3g, and the novel sulfur-free propellant prepared by using the composite insensitive agent only needs 1.5g of the propellant, so that the propellant height of more than 50 m can be reached. And when destructive experiments are carried out, the medicine is taken to 5g in excess amount, and the problem of cylinder explosion cannot occur. The emission effect is achieved, meanwhile, the production cost is saved, and the environmental pollution is reduced.

Red bright bead: according to the parts by weight, the composite desensitizer comprises the following components: and (3) potassium perchlorate: alloy: resin: strontium carbonate: polyvinyl chloride: chloride ion 10: 40: 5: 6: 20: 9: 20, and uniformly mixing according to a general method. The bright bead manufactured by the composite type desensitizer can avoid spontaneous combustion of fermentation and temperature rise in a humid environment, and meanwhile, the ignition rate and the color brightness of the bright bead are not influenced.

The passivation type firework powder prepared by the method is tested by using GB 10631-.

The above-mentioned implementation is only for clearly illustrating the technical solutions of the present invention, and is not to be construed as limiting the present invention in any way. The present invention has many known alternatives and modifications in the art, which fall within the scope of the present invention without departing from the spirit of the present invention.

Claims

1. A composite insensitive agent for fireworks and crackers pyrotechnic composition is characterized in that the composite insensitive agent consists of heavy magnesium oxide, calcium stearate, bismuth trioxide, dicyclopentadiene iron and phthalic anhydride; the method is used for preparing insensitive firework and firecracker explosive, propellant powder or bright beads; the composite type desensitizer comprises the following components in parts by weight: 40-60 parts of magnesium oxide, 5-10 parts of calcium stearate, 1-5 parts of bismuth trioxide, 10-15 parts of dicyclopentadiene iron and 5-10 parts of phthalic anhydride.