Development of composition formulations, based on natural bischofite, to protect wood from fire

Natalia Omelchenko, Viktoriia Dmytrenko, Natalia Lysenko, Anna Brailko, Maryna Martosenko


We have studied the chemical composition of natural bischofite extracted from well No. 1 at Zaturin deposit and revealed that the sufficient saturation of МgСl2 allows its use as an environmentally-oriented base for composition formulations in order to protect wood from fire. Our experimental research has confirmed the efficiency of applying organic synthetic dyes (methyl orange, bromothymol blue) as coloring additives for the reported composition formulations. Technological features have been defined for using the pigment concentrates of trade marks «Amber» and «Sniezko», which form two-phase systems with a solution of natural bischofite. It has been proven that the proposed coloring additives ensure the stable wood coloration and saturated color of its surface. The efficiency of using coloring additives (bromothymol blue and methyl orange; the pigment concentrates of ТМ «Amber» and TM «Sniezko») for the developed composition formulations aimed at fire-protective treatment of wood has been confirmed under laboratory conditions. Our experimental study has established that flammability time of the timber treated with a composition formulation without coloring additives increases by 4 times compared to untreated wood. The fire-retardant mechanism of the developed composition formulations is predetermined by the successive processes of bischofite salt conversion under a temperature influence and by the addition of orthophosphoric acid, which is a strong fire retardant. Introducing the coloring additive (colorant) methyl orange to the composition formulation increases its flammability time by more than 4 times, compared to untreated wood. Thus, there is reason to argue that the developed composition formulations that contain coloring additives (colorants) are environmentally-oriented and economically feasible. At the same time, the results obtained resolve an integrated task, namely ensuring fire- and bio-protection, as well as visualizing the applied treatment of wood-based construction structures at residential buildings and non-residential facilities


bischofite; coloring additive; pigment concentrate; composition formulation; fire-protective agent; visualization of treatment


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ISSN (print) 1729-3774, ISSN (on-line) 1729-4061