COMPARATIVE VALUATION OF FIREPROOF CHARACTERISTICS OF FOAMING COVERS ON BASIS AMMONIUM PHOSPHATES AND WATER-SOLUBLE AMMONIUM SALTS OF AMINOMETHYLENEPHOSPHONIC ACIDS
The work objective is researching of the influence of nitrogen-phosphorus-containing compounds on fireproof characteristics of covers on basis of stirolacrylic dispersion Akratam AS 04.1. Ammonium polyphosphate, diammonium phosphate, monoammonium phosphate and water-soluble ammonium salts of aminomethylenephosphonic acids, contain in crude product - Ammafon-1 were used as nitrogen-phosphorus-containing compounds. Primary assessment of the fireproof effectiveness foaming covers has shown, that covers based on ammonium polyphosphate show higher fireproof effect, than covers based on diammonium phosphate and monoammonium phosphate. Optimum relationship of ammonium polyphosphate and water-soluble ammonium salt of aminomethylenephosphonic acids in conversion to bone-dry solids is 50:50 weight parts. Weight loss of wooden samples for covers, based on that optimum relationship, equaled less 7 % with consumption 0.4 kg/m 2.