A kind of anti-resurgence BC type superfine dry powder fire extinguishing agent and preparation method thereof
An ultra-fine dry powder, anti-re-ignition technology, applied in fire protection equipment and other directions, can solve the problems of complicated preparation process, no mention of cleaning of ultra-fine dry powder fire extinguishing agent, inability to carry out mass production and other problems, to reduce surface tension, The effect of reducing moisture absorption and agglomeration properties
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[0037] The present invention also provides a preparation method of the above-mentioned anti-resurgence BC superfine dry powder fire extinguishing agent, comprising the following steps: S1) mixing 70 to 90 parts by weight of bicarbonate and 2.5 to 10 parts by weight of hydrophilic gas phase whitening agent Carbon black is mixed to obtain a mixture; S2) The mixture, 2 to 5 parts by weight of perfluorononenyloxybenzene sulfonate and 0.5 to 3 parts by weight of silane coupling agent are mixed and reacted to obtain the anti-reburning BC type Superfine dry powder fire extinguishing agent.
[0038] The present invention has no special limitation on the sources of all raw materials, which can be commercially available.
[0039] Wherein, the bicarbonate, hydrophilic fumed silica, sodium perfluorononenyloxybenzene sulfonate and silane coupling agent are the same as those described above, and will not be repeated here.
[0040] According to the present invention, the particle size of the ...
Embodiment 1
[0047] An easy-to-clean anti-resurgence BC superfine dry powder fire extinguishing agent, the raw materials include 75% sodium bicarbonate, 10% hydrophilic fumed white carbon black, 10% crushing aid, perfluorononene oxygen Sodium phenyl sulfonate 2.5%, γ-glycidyl etheroxypropyl trimethoxysilane 2.5%.
[0048] Weigh the sodium bicarbonate and crushing aids according to the mass ratio, and carry out sufficient crushing in a supersonic jet mill until the particle size is less than 5 μm. Mix the pulverized raw materials and hydrophilic fumed silica in the reaction kettle, and disperse them with high-speed stirring for 2 hours to obtain a mixture; mix sodium perfluorononenyloxybenzenesulfonate with γ-glycidyl etheroxypropyl trimethoxy The base silane is fully dissolved in the mixed solution of ethanol and water according to the mass ratio (the mass ratio of ethanol to water is 20:1; the mass ratio of sodium perfluorononenyloxybenzenesulfonate to the mixed solution is 1:10), and in ...
Embodiment 2
[0052] An easy-to-clean anti-resurgence BC superfine dry powder fire extinguishing agent, the raw materials include 80% potassium bicarbonate, 7.5% hydrophilic fumed silica, 7.5% crushing aid, perfluorononene oxygen Sodium phenyl sulfonate 4.5%, vinyl trichlorosilane 0.5%.
[0053] Potassium bicarbonate, crushing aids, and hydrophilic fumed silica were weighed according to the mass ratio, and fully dispersed and crushed in a supersonic jet mill until the particle size was less than 5 μm. The mixed and pulverized raw materials were stirred and dispersed at a high speed in a reactor for 2 hours to obtain a mixture; sodium perfluorononenyloxybenzenesulfonate and vinyl trichlorosilane were fully dissolved in a mixed solution of ethanol and water according to the mass ratio (ethanol The mass ratio with water is 23:1; the mass ratio of sodium perfluorononenyloxybenzene sulfonate to the mixed solution is 1:13), and slowly drop (3g / min) under high-speed stirring (1500rpm) to In the m...
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