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Inhibitor with sustained release property and preparation method thereof

A chemical inhibitor and slow-release technology, which is applied in the field of slow-release inhibitors and their preparation, can solve the problems of increasing construction strength, increasing costs, and inconvenience in the spontaneous combustion process, so as to reduce construction strength, prolong flame retardant time, The effect of reducing the number of spraying

Active Publication Date: 2009-12-23
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this will not only increase the cost, but also increase the construction strength, which will bring great inconvenience to the process of preventing spontaneous combustion

Method used

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  • Inhibitor with sustained release property and preparation method thereof
  • Inhibitor with sustained release property and preparation method thereof
  • Inhibitor with sustained release property and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The specific preparation process of the slow-release inhibitor in this embodiment is:

[0013] Put 2g of acrylonitrile-butadiene-styrene copolymer, 17.8g of acetone and 0.2g of alkylphenol polyoxyethylene ether in a three-necked flask, and stir mechanically at room temperature until the emulsion is transparent; weigh 18g of calcium chloride Add it to the above emulsion, reflux at 40°C, condense and mechanically stir for 2 to 3 hours, then place the resultant in an oven, bake at 60 to 80°C for 6 to 8 hours, and grind to obtain the slow-release product of the present invention. inhibitors.

[0014] The slow-release inhibitor prepared in this example, its slow-release detection method is:

[0015] The first step, first weigh 1g of the inhibitor product prepared in this embodiment, and the quality is recorded as M 1 , then weigh the mass of a piece of filter paper, denoted as M 0 , and then wrap the product with filter paper;

[0016] In the second step, weigh five grou...

Embodiment 2

[0023] Put 3g of acrylonitrile-butadiene-styrene copolymer, 16.8g of acetone and 0.2g of alkylphenol polyoxyethylene ether in a three-necked flask, and mechanically stir at room temperature until the emulsion is transparent; then add 18g of magnesium chloride at 40°C Reflux and condense and mechanically stir for 2-3 hours, then place the resultant in an oven, bake at 60-80°C for 6-8 hours, and pulverize to obtain the slow-release inhibitor of the present invention.

[0024] Detect the sustained release of the inhibitor prepared in this embodiment:

[0025] The first step, first weigh 1g of the product inhibitor of this embodiment, and the quality is recorded as M 1 , then weigh the mass of a piece of filter paper, denoted as M 0 , and then wrap the product with filter paper;

[0026] In the second step, weigh five groups of samples in the same way and wrap them with filter paper; stack these six groups of samples in turn in a beaker with a capacity of 500ml, and place a piec...

Embodiment 3

[0033] Put 4g of polymethyl methacrylate, 15.8g of acetone and 0.2g of alkylphenol polyoxyethylene ether in a three-necked flask, and mechanically stir at room temperature until the emulsion becomes transparent; then add 17g of potassium chlorate and reflux at 50°C to condense and mechanically stir After 2-3 hours, put the resultant in an oven, bake it at 60-80°C for 6-8 hours, and pulverize it to obtain the slow-release inhibitor of the present invention.

[0034] The sustained-release detection of the inhibitor prepared in this embodiment:

[0035] The first step is to weigh 1g of the inhibitor product first, and record the mass as M 1 , then weigh the mass of a piece of filter paper, denoted as M 0 , and then wrap the product with filter paper;

[0036] The second step is to weigh five groups of samples in the same way, stack these six groups of samples in turn in a beaker with a capacity of 500ml, and place a piece of filter paper between each two groups of samples and a...

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Abstract

The invention discloses an inhibitor with sustained release property and a preparation method thereof, and the inhibitor is characterized by comprising the following steps of preparing a polymer emulsion by evenly mixing 10-20% of polymer, 79-89% of solvent and 1% of surfactant according to the percentage of the total weight of the prepared emulsion, further adding 4-9 times of the weight of the polymer emulsion of an inorganic salt type inhibitor, stirring for 2-3 hours at the temperature of 40-50 DEG C, drying an obtained product for 6-8 hours at the temperature of 60-80 DEG C, smashing and then obtaining the inhibitor product with the sustained release property. The preparation method is simple and easy to operate, the obtained product can be sustainedly released during the prevention and control process of coal spontaneous combustion of a mine, thereby prolonging the time of flame retardance; the residual polymer is covered on a coal layer, thereby also playing the roles of oxygen isolation and inhibitation; furthermore, the polymer can utilize waste plastics, and the preparation and the using process can not cause harm to environment, thereby having great application prospect.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of mine coal spontaneous combustion, and in particular relates to a slow-release inhibitor containing polymer, inorganic salt and surfactant and a preparation method thereof. Background technique [0002] Existing inhibitors for preventing spontaneous combustion of mine coal include physical inhibitors and chemical inhibitors. Physical inhibitors are mainly inorganic salts and gels, which absorb moisture in the air by attaching to the surface of coal, reduce the temperature of the coal seam and form a water-containing liquid film on the surface of coal particles to prevent the contact between coal and oxygen, to achieve Inhibition effect; chemical inhibitors are mainly oxidants, by capturing or passivating free radicals before the coal surface active free radicals react with oxygen, blocking the reaction chain of coal oxidation, reducing the spontaneous combustion tendency of coal, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/06C08L23/00C08L75/04C08L77/00C08L67/00C08L71/00
Inventor 胡源杨伟倪健雄宋磊
Owner UNIV OF SCI & TECH OF CHINA
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