FIELD: chemistry.
SUBSTANCE: fire retardant impregnating composition includes diammonium phosphate, ammonium sulfate, sodium fluoride, sulfonol, and water. The fire-retardant impregnating composition further contains para-phenylenediamine, which is an active water-soluble antiseptic for wood. Fire retardant impregnating composition has the following mixing ratio (wt %): diammonium phosphate - 20, ammonium sulfate - 5, sodium fluoride - 3, sulfanol - 1-1.5, pair-phenylendiamine - 0.5-2.0, water - the rest.
EFFECT: fire resistance of wood is increased.
1 tbl
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