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Novel environment-friendly combustion type smoke screen agent based on polyurethane porous material

A porous material, polyurethane technology, used in the generation of smoke/mist, attacking equipment, etc., to achieve the effect of easy availability of raw materials, low manufacturing cost, and improved flame retardancy

Active Publication Date: 2021-06-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Combined with the characteristics of flammability and long-lasting burning time of polyurethane porous materials, it is used as a matrix material and compounded with phthalic anhydride environment-friendly smoke screen formula to obtain a new type of environment-friendly burning smoke screen agent based on polyurethane porous materials, aiming to obtain high safety, A smoke screen agent that is easy to burn, produces smoke for a long time, and has a good electromagnetic shielding effect has not yet been publicly reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) 6g of deionized water, 0.2g of triethylenediamine, 1.5g of foam stabilizer and 100g of polyether polyol are mechanically stirred at a speed of 500r / min until they are evenly mixed to obtain component A, and 0.2g of stannous octoate Add component A and stir at a speed of 500r / min until it is evenly mixed to obtain component B, then add 170g of toluene diisocyanate to component B and stir rapidly at a speed of 2000r / min for 6s to obtain a foam intermediate Pour it into a mold and wait for it to solidify Then put it in an oven and keep it at 85°C for 10 minutes to obtain a polyurethane porous material;

[0022] (2) The obtained polyurethane porous material is put into a pulverizer and pulverized into millimeter-sized particles, and the scaly pyromellitic anhydride is dried in an oven to be ground into a micron-sized powder by a ball mill at a speed of 300 r / min;

[0023] (3) Put 5g of polyurethane porous material millimeter-sized particles, 45g of phthalic anhydride po...

Embodiment 2

[0026] (1) 6g of deionized water, 0.2g of triethylenediamine, 1.5g of foam stabilizer and 100g of polyether polyol are mechanically stirred at a speed of 500r / min until they are evenly mixed to obtain component A, and 0.2g of stannous octoate Add component A and stir at a speed of 500r / min until it is evenly mixed to obtain component B, then add 170g of toluene diisocyanate to component B and stir rapidly at a speed of 2000r / min for 6s to obtain a foam intermediate Pour it into a mold and wait for it to solidify Then put it in an oven and keep it at 85°C for 10 minutes to obtain a polyurethane porous material;

[0027] (2) The obtained polyurethane porous material is put into a pulverizer and pulverized into millimeter-sized particles, and the scaly pyromellitic anhydride is dried in an oven to be ground into a micron-sized powder by a ball mill at a speed of 300 r / min;

[0028] (3) Put 5g of polyurethane porous material millimeter-sized particles, 45g of phthalic anhydride po...

Embodiment 3

[0031] (1) 6g of deionized water, 0.2g of triethylenediamine, 1.5g of foam stabilizer and 100g of polyether polyol are mechanically stirred at a speed of 500r / min until they are evenly mixed to obtain component A, and 0.2g of stannous octoate Add component A and stir at a speed of 500r / min until it is evenly mixed to obtain component B, then add 170g of toluene diisocyanate to component B and stir rapidly at a speed of 2000r / min for 6s to obtain a foam intermediate Pour it into a mold and wait for it to solidify Then put it in an oven and keep it at 85°C for 10 minutes to obtain a polyurethane porous material;

[0032] (2) The obtained polyurethane porous material is put into a pulverizer and pulverized into millimeter-sized particles, and the scaly pyromellitic anhydride is dried in an oven to be ground into a micron-sized powder by a ball mill at a speed of 300 r / min;

[0033] (3) Put 5g of polyurethane porous material millimeter-sized particles, 45g of phthalic anhydride po...

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Abstract

The invention discloses a novel environment-friendly combustion type smoke agent based on a polyurethane porous material, and belongs to the technical field of smoke agents used for electromagnetic shielding. Polyol and isocyanate are used as raw materials to prepare the polyurethane porous material by adopting an all-water foaming technology, the polyurethane porous material is compounded with magnesium powder, aluminum powder, polytetrafluoroethylene, phthalic anhydride and the like according to a certain proportion, and the obtained mixture is pressed into a medicine column to obtain the combustion type smoke screen agent with the press-fitting density of about 1.15 g / cm<3>. Compared with a traditional smoke screen agent, the smoke screen agent has the advantages of being easy to ignite, large in smoke yield, long in duration time and small in pollution, the electromagnetic shielding efficiency in the X wave band can reach 30 dB, the infrared transmittance is close to 0%, and the good electromagnetic shielding effect is achieved.

Description

technical field [0001] The invention relates to the technical field of preparation of smoke screen agents, and relates to a novel environment-friendly burning smoke screen agent based on polyurethane porous material for electromagnetic shielding. Background technique [0002] Information warfare has made precision-guided weapons account for an increasing proportion of the total ammunition, and the corresponding electromagnetic countermeasure ammunition has also been upgraded. As an important means of confrontation, smoke screens are playing an increasingly important role in modern information warfare. effect. In recent years, there are mainly two types of combustion-type smoke agents researched by various countries, namely red phosphorus-based smoke agents and improved HC-type smoke agents. Although the smoke produced by the combustion of smoke agents such as red phosphorus and hexachloroethane has a good electromagnetic shielding effect in a wide frequency band (such as vi...

Claims

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Application Information

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IPC IPC(8): C06D3/00C08G18/66C08G18/48C08G18/32C08G18/67C08G101/00
CPCC06D3/00C08G18/6685C08G18/48C08G18/3228C08G18/36
Inventor 束庆海姚嫒嫒吕席卷邹浩明杜君宜束红年
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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