INFLUENCE OF THE RATIO OF FIRE PROTECTION COMPONENTS ON THE FIRE PROTECTION EFFICIENCY OF WATER BASED COATINGS OF METAL STRUCTURES

Abstract

The creation of polymer fire-resistant coatings for metal structures has always been and remains one of the priority areas of fire protection of buildings and structures, since the material costs of recovery after a fire many times exceed the costs of preventive fire protection measures. 

In addition to providing the properties required for most paint materials, the film-forming component must decompose in the correct temperature range along with the other flame retardant components to be able to undergo the chemical reactions that result in the formation of foamcoke. Moreover, it should have a melt viscosity that is not too low to prevent the molten flame retardant coating from slipping during foaming, and not too high to prevent foaming. 

As a result of the conducted experimental studies on the determination of the coefficient of swelling, its strength and the group of fire-resistant efficiency, developed fire-resistant coatings based on styrene-acrylic water dispersion from the content of fire-resistant components it was established that all experimental coatings have the first group of fire protection efficiency. Foamcoke, formed by PFA components 25 mas.%, PE 15-25 mas.%, Al(OH)3 40 mas.% has a porous structure, uniform, dense and small cells, without microcracks and large cavities, which provides better insulating properties.