Abstract:
A process is provided for treating wood products including lumber, plywood and other engineered wood products comprising the steps of applying an aqueous fire-retardant impregnate and applying a coating to the surface of the wood product. In one embodiment, said process confers fire-retardant properties to the wood products sufficient to pass the extended burn test of ASTM E-84. The present invention also provides fire retardant wood products.
Abstract:
The present invention provides an aqueous fire retardant composition comprising phosphoric acid, ammonium, diammonium phosphate, ammonium sulfate, urea, and a complexing agent. The present invention also provides a method for treating wood, and wood obtained by said method.
Abstract:
Fire retarding and smoke inhibiting aqueous composition and a method for a one-step impregnation of aqueous-absorbable--and normally inflammable materials, such as wood, paper and textiles, said composition comprising ammoniumphosphates, phosphoric acid, water soluble metal salts with ability to form water insoluble salts with phosphate ions and/or ammoniumphosphate ions, and other optional additives.The composition comprises in combination:0.5-90% by weight monoammoniumphosphate and/or diammoniumphosphate,0.1-30% water-soluble metal salts with ability to form water insoluble salts with phosphate ions and/or ammoniumphosphate ions,1-20% by weight acid especially phosphoric acid (85%),1-15 % by weight dicyandiamide, andoptionally up to 5% by weight additivesin a total concentration of from 1 to 50% by weight with respect to the total weight of the aqueous solution, whereby phosphoric acid and dicyandiamide are present in the form of the reaction product guanylureaphosphate.
Abstract:
A method for imparting flame resistance to exposed surfaces of wood by impregnating and reacting wood surfaces with dimethyl(oxiranylmethyl)phosphonate (DMOMP) is described. The resulting treated wood products are useful in applications where flame resistance is important.
Abstract:
The invention pertains to a method of manufacturing a fire proof board from strands of wood, the method comprising the following steps in the given order: (a) providing strands of wood, (b) immersing the strands of wood in a watery solution of a flame retardant chemical composition, (c) separating the strands of wood from each other, (d) at least in part drying the strands of wood, (e) applying an adhesive to the strands of wood, and (f) forming a board of a predetermined shape from the strands. The invention furthermore pertains to a board formed by a plurality of strands of wood that are compressed and bonded together with an adhesive, wherein the board further comprises a flame retardant chemical composition, said composition comprising a phosphate compound.