Phosphonic acid as a component of low flammability particle boards

The possibility of using dibasic hydroxyethylidene diphosphonic acid to reduce the flammability of particle boards has been considered. A formulation was compiled with the addition of amino alcohols, surfactants and other auxiliary compounds, conventionally called the fire retardant Palonot. Wood substrate (veneer) was impregnated with various amounts of Palonot, and the development of combustion during ignition and subsequent attenuation with a regular increase in heat loss to the environment was studied. The results were compared with amidophosphate, which has found industrial use in fire protection of wood-based materials. The manufactured three-layer boards withstood the test in the "fire tube" and met the main requirements of the current standards for general-purpose boards. The thermomechanical curves and the details of the process of adhesion of the binder to the substrate containing the flame retardant are provided. The conditions for the manufacture of wood-based materials with the patented Palonot have been analyzed.