Modification method for fireworks and crackers by coating potassium chlorate

A technology of fireworks and firecrackers, potassium chlorate, applied in the directions of alkali metal compositions and the like, can solve the problems of reducing the mechanical sensitivity of fireworks and firecrackers, and the fireworks and firecrackers containing potassium chlorate are prone to explosion, etc., and achieves reduced mechanical sensitivity, improved safety, and thermal safety. improved effect

Inactive Publication Date: 2009-06-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that fireworks and firecrackers containing potassium chlorate are prone to explosion during production and transportation, and provide a me

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Example 1

[0013] Add 0.12g of the silane coupling agent KH-550 into a 250ml three-necked flask containing 30g of toluene, stir evenly, and then add 10g of potassium chlorate particles with a particle size of 200 meshes, heat the water bath to 80°C, and start during the heating process. The stirrer makes the potassium chlorate particles uniformly dispersed in the toluene solution of the silane coupling agent, and condenses and refluxes for reaction for 3 hours. After the reaction, the product was filtered out and placed in a 90°C constant temperature drying oven for 4 hours to obtain a layer of coated product.

[0014] Add 5 g of the product coated with a silane coupling agent to a three-necked flask containing 30 g of 1% polyvinyl butyral solution in chloroform, and stir and moisten it at a temperature of 50°C. Then, while stirring, add 60 g of n-hexane at a rate of 2 ml / min. After the addition is complete, continue to stir and react for 4 hours. At the end of the reactio...

Example Embodiment

[0016] Example 2

[0017] Add 0.16g of silane coupling agent KH-550 to a 250ml three-necked flask containing 30g of toluene, stir evenly, then add 10g of potassium chlorate particles with a particle size of 200 meshes, heat the water bath to 80°C and start during the heating process The stirrer makes the potassium chlorate particles uniformly dispersed in the toluene solution of the silane coupling agent, and condenses and refluxes for reaction for 3 hours. After the reaction, the product was filtered out and placed in a 90°C constant temperature drying oven for 4 hours to obtain a layer of coated product.

[0018] Into a three-necked flask containing 40g of 1% polyvinyl butyral solution in chloroform was added 5g of the product coated with a silane coupling agent, and stirred and wetted at a temperature of 50°C for 30 Then, while stirring, add 60 g of n-hexane at a rate of 2 ml / min. After the addition is complete, continue to stir and react for 4 hours. At the end of the reaction...

Example Embodiment

[0020] Example 3

[0021] Add 0.20g of silane coupling agent KH-550 to a 250ml three-necked flask containing 30g of toluene, stir evenly, and then add 10g of potassium chlorate particles with a particle size of 200 meshes, heat the water bath to 80℃, and start during the heating process. The stirrer makes the potassium chlorate particles uniformly dispersed in the toluene solution of the silane coupling agent, and condenses and refluxes for reaction for 3 hours. After the reaction, the product was filtered out and placed in a 90°C constant temperature drying oven for 4 hours to obtain a layer of coated product.

[0022] Add 5g of the product coated with a silane coupling agent to a three-necked flask containing 50g of 1% polyvinyl butyral solution in chloroform, and stir and moisten at a temperature of 50℃ for 30 Then, while stirring, add 60 g of n-hexane at a rate of 2 ml / min. After the addition is complete, continue to stir and react for 4 hours. At the end of the reaction, the ...

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Abstract

The invention relates to a modification method for fireworks and crackers by coating potassium chlorate, belonging to the field of fireworks and crackers. The invention comprises the steps as follows: firstly, coupling agent is employed to form a first coating film on the surface of potassium chlorate particles; secondly, a layer of high polymer material is coated to form a second coating film. The method greatly reduces the mechanical sensitivities of fireworks and crackers agents such as friction, collision and the like under the condition that the setting off effect of the fireworks and crackers is not influenced, coincides with national standards and improves the thermal safety.

Description

technical field [0001] The invention relates to a modification method for fireworks and firecrackers coated with potassium chlorate, belonging to the field of fireworks and firecrackers. Background technique [0002] Potassium chlorate is an important raw material in fireworks and other pyrotechnic agents. Potassium chlorate is a strong oxidizing agent. Zhuo Nan and other scholars pointed out in their article "Development of Modified Potassium Chlorate" that the effective oxygen content of potassium chlorate is 39%, and oxygen is released at 352°C. It has low decomposition temperature, low hygroscopicity, good explosive performance, and good storage stability. , simple production process, low cost and other characteristics. However, when this substance is mixed or contacted with organic substances, reducing agents, and combustible substances (such as sulfur, phosphorus, ammonium compounds, metal powder, etc.), there is a danger of combustion and explosion. Potassium chlor...

Claims

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Application Information

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IPC IPC(8): C06B29/02
Inventor 钱新明刘振翼王鹏飞邓楠赵家玉黄平
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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