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Sulfur-free propellant and preparation method thereof

A propellant and weight technology, which is applied in the field of propellant, can solve the problems of high impact sensitivity and moisture absorption rate, high impact ignition rate, environmental pollution, etc., and achieve the effects of enhancing safety and stability, simple preparation method, and reducing production cost

Active Publication Date: 2017-01-11
陈绍清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are disadvantages such as easy to be affected by moisture, low safety performance, and easy to cause environmental pollution (the smog is relatively large)
In addition, this type of black powder has a low ignition point (398°C), sulfur content, high friction sensitivity, impact sensitivity and moisture absorption rate
[0003] The inventor found that the existing sulfur-free propellant consists of potassium perchlorate, charcoal, potassium hydrogen terephthalate and resin. This sulfur-free propellant has the problems of being susceptible to moisture and high rate of impact ignition, and cannot be applied to production and daily life. Therefore, it is necessary to develop a sulfur-free propellant that is safe, environmentally friendly, and has good gunpowder performance.

Method used

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  • Sulfur-free propellant and preparation method thereof

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preparation example Construction

[0018] The present invention also provides a method for preparing sulfur-free propellants, the method comprising: stirring and mixing the filler, the binder, the calcium stearate and the potassium hydrogen phthalate into a powder, and then the powder was mixed with the potassium perchlorate to granulate and air-dried.

[0019] Preferably, the method further includes: sieving and / or pulverizing the granulated particles.

[0020] Preferably, the stirring and mixing is done in a blender.

[0021] Preferably, mixing said powder with said potassium perchlorate is done in a pharmaceutical mixer.

[0022] The above-mentioned stirring and mixing steps are respectively carried out by a blender and a medicine mixer, so that the preparation process is safer. The stirrer and medicine mixer can be conventional stirrers and medicine mixers in the art.

[0023] Specifically, the preparation method of sulfur-free propellant includes:

[0024] a), stirring the filler, the binder, the calci...

Embodiment 1

[0032] 12 parts by weight of hemp straw charcoal, 18 parts by weight of phenolic resin, 9 parts by weight of calcium stearate and 18 parts by weight of potassium hydrogen phthalate were stirred by a mixer to obtain powder.

[0033] Mix the powder and 43 parts by weight of potassium perchlorate through a drug mixer to obtain a mixed drug.

[0034] The mixed drug is granulated by a granulator to obtain sulfur-free propellant granules.

[0035] Sieve the sulfur-free propellant particles through a standard sieve. The standard sieve is divided into upper and lower layers, among which, the upper layer is a standard sieve with a sieve hole of 6mm; the lower layer is a standard sieve with a sieve hole of 4mm. Sulfur-free propellant particles with a particle size larger than 6mm that have not passed the screening are re-screened after crushing, and the sulfur-free propellant particles with a particle size smaller than 4mm are returned to the granulator for re-granulation under a 4mm s...

Embodiment 2

[0038] 13 parts by weight of hemp straw charcoal, 17 parts by weight of phenolic resin, 8 parts by weight of calcium stearate and 24 parts by weight of potassium hydrogen phthalate were stirred by a mixer to obtain powder.

[0039] Mix the powder and 38 parts by weight of potassium perchlorate through a drug mixer to obtain a mixed drug.

[0040] The mixed drug is granulated by a granulator to obtain sulfur-free propellant granules.

[0041] Sieve the sulfur-free propellant particles through a standard sieve. The standard sieve is divided into upper and lower layers, among which, the upper layer is a standard sieve with a sieve hole of 6mm; the lower layer is a standard sieve with a sieve hole of 4mm. The sulfur-free propellant particles with a particle size larger than 6mm that have not passed the screening are re-screened after crushing, and the sulfur-free propellant particles with a particle size smaller than 4mm are returned to the granulator for re-granulation under a 4...

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Abstract

The invention provides sulfur-free propellant. The sulfur-free propellant is prepared from 35wt%-52 wt% of potassium perchlorate, 5 wt%-15 wt% of a filling agent, 8 wt%-20 wt% of a bonding agent, 5 wt%-18 wt% of calcium stearate and 10 wt%-30 wt% of potassium acid phthalate by taking the total weight of the sulfur-free propellant as a standard. The sulfur-free propellant is low in friction sensitivity, impact sensitivity and moisture absorption capacity and high in thrust, and meanwhile pollution to the environment is reduced.

Description

technical field [0001] The present invention relates to the field of propellants, more specifically, to a sulfur-free propellant and a preparation method. Background technique [0002] With the development of society, propellants are widely used in daily life and celebration activities. Most of the existing propellants are black powder, whose main components are potassium nitrate, sulfur, fir powder, etc., which adopt traditional manufacturing methods. It 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. There are disadvantages such as easy to be affected by moisture, low safety performance, and easy to cause environmental pollution (the smog is relatively large). In addition, this type of black powder has a low ignition point (398°C), sulfur content, high friction sensitivity, impact sensitivity and moisture absorption rate. [0003] The inve...

Claims

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Application Information

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IPC IPC(8): C06B29/12
CPCC06B29/12
Inventor 陈绍清
Owner 陈绍清
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