FIREPROOF STRUCTURES FOR WOOD ON THE BASIS OF PRODUCTS OF DESTRUCTION OF POLYURETHANES BY DIETHYLENETRIAMINE

Abstract

The purpose of this paper is to obtain nitrogen phosphorus flame retardants for wood-based products of destruction of polyurethanes by diethylenetriamine and study their properties. Destruction products are a mixture consisting of diamines, glycols, and also, the diamide of adipic acid and an excess of diethylenetriamine. Destruction products used in the reaction Kabachnik - Fields as amine component to synthesize а-aminomethylenephosphonic acids, and aliphatic aromatic. The reaction mass after phosphorylation containing mixture а-aminomethylenephosphonic acids neutralized with aqueous ammonia solution to pH = 7 to give a mixture of ammonium salts of а-aminomethylenephosphonic acids. The resulting solution of ammonium salts of а-aminomethylenephosphonic acid was tested as a flame retardant for wood. Initial evaluation of the efficiency of nitrogen phosphorus flame retardants based on destruction products of polyurethanes by diethylenetriamine showed that at a rate of more than 140 g/m² all flame retardants provide weight loss samples revesiny less than 9 %.