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Polyurethane coated modified potassium chlorate and preparation method and applications thereof

A technology of potassium chlorate and polyurethane, applied in the direction of alkali metal composition, etc., can solve the problems of poor discharge effect and high price and cost, and achieve the effects of improving thermal safety and stability, low cost, and reducing mechanical sensitivity

Inactive Publication Date: 2013-08-14
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been proposed in the prior art to modify the potassium chlorate product itself to reduce its mechanical sensitivity. In recent years, many research results have appeared to try to solve this problem, but due to the influence of various factors (or because the price cost is too high, or because The effect of firing is not good, etc.), the existing modification methods have not been widely used in this field, and its technical solutions need to be further improved

Method used

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  • Polyurethane coated modified potassium chlorate and preparation method and applications thereof
  • Polyurethane coated modified potassium chlorate and preparation method and applications thereof

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Embodiment 1

[0031] a kind of like figure 1 The polyurethane-coated modified potassium chlorate of the present invention is shown, the polyurethane-coated modified potassium chlorate has a core-shell structure, potassium chlorate is used as the core, polyurethane is used as the coated shell, and the mass ratio of polyurethane to potassium chlorate is 0.1:1. The polyurethane-coated modified potassium chlorate is in the shape of spherical particles, and the average particle size is between 30 μm and 35 μm.

[0032] The above-mentioned polyurethane-coated modified potassium chlorate of the present embodiment is prepared by coating polyurethane material on the surface of potassium chlorate particles by in-situ polymerization, and the specific preparation includes the following steps:

[0033] 1. Raw material preparation and pretreatment:

[0034] Potassium chlorate, polypropylene glycol, dimethylol propionic acid, butylene glycol, triethylamine, toluene diisocyanate and xylene are the main ra...

Embodiment 2

[0045] A polyurethane-coated modified potassium chlorate of the present invention, the polyurethane-coated modified potassium chlorate has a core-shell structure, potassium chlorate is used as the core, polyurethane is used as the coated shell, and the mass ratio of polyurethane to potassium chlorate is 0.05:1. The polyurethane-coated modified potassium chlorate is in the shape of spherical particles, and the average particle size is between 30 μm and 35 μm.

[0046] The above-mentioned polyurethane-coated modified potassium chlorate of the present embodiment is prepared by coating polyurethane material on the surface of potassium chlorate particles by in-situ polymerization, and the specific preparation includes the following steps:

[0047] 1. Raw material preparation and pretreatment:

[0048] Potassium chlorate, polypropylene glycol, dimethylol propionic acid, butylene glycol, triethylamine, toluene diisocyanate and acetone are the main raw materials, among which, polyprop...

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Abstract

The invention discloses a kind of polyurethane coated modified potassium chlorate. The polyurethane coated modified potassium chlorate is of a core-shell structure, takes potassium chlorate as an inner core and takes polyurethane as a coating shell, and the mass ratio of the polyurethane to the potassium chlorate is 0.1-0.05:1. The invention also discloses a preparation method of the polyurethane coated modified potassium chlorate. The preparation method comprises the following steps: adding toluene diisocyanate and dehydrated polypropylene glycol into an organic solvent, adding potassium chlorate particles, heating, stirring, and carrying out condensed backflow; cooling a reaction system, adding a dehydrated dimethylolpropionic acid and a catalyst into the reaction system, stirring and carrying out condensed backflow; adding dehydrated butanediol into the reaction system, stirring and carrying out condensed backflow; and adding dehydrated triethylamine, and after the obtained object is fully stirred, carrying out solid-liquid separation, and drying obtained solid particles so as to obtain products. A polyurethane coated modified potassium chlorate product disclosed by the invention can be used as an oxidant for fireworks and crackers, and can reduce the mechanical sensitivity of potassium chlorate containing pyrotechnic compositions and increase the thermal security and stability thereof.

Description

technical field [0001] The invention relates to an oxidizing agent and its preparation, in particular to a modified potassium chlorate oxidizing agent, its preparation and its application in 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. Many domestic scholars have pointed out that potassium chlorate has an effective oxygen content of 39% and releases oxygen at 352°C. It has the characteristics of low decomposition temperature, low hygroscopicity, good explosive performance, good storage stability, simple production process, and low cost. However, when potassium chloride is mixed or contacted with reducing agents and combustibles (such as sulfur, phosphorus, ammonium compounds, metal powders, etc.), the resulting potassium chlorate-containing pyrotechnic agent has extremely high mechanical sensitivity to friction ...

Claims

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Application Information

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IPC IPC(8): C06B29/02
Inventor 成茵周伟伟刘其城刘鹏夏清
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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