Non-resinous, uncured tire retardant and products produced therewith
AssigneeKoppers Company, Inc.
InventorWilliam J. Oberley
Life of this patent
Estimating the term…
Abstract
Synergistic fire retardants for wood and other cellulosic materials which are substantially non-hygroscopic and which do not require high curing temperatures in the material treated are formed of the partial reaction product of dicyandiamide, phosphoric acid, boric acid and water wherein the combined weight ratio of dicyandiamide and phosphoric acid to boric acid is from about 60 to about 40 to from about 90 to about 10.
Claims34
A synergistic fire retardant composition useful for treating cellulosic materials consisting essentially of the partial reaction product of dicyandiamide, phosphoric acid, boric acid and water wherein prior to reaction the mole ratio of dicyandiamide to phosphoric acid is from 1.0 to about 0.8-1.2 and the mole ratio of boric acid to combined dicyandiamide and phosphoric acid is from about 0.2-1.5 to 1.0.
A process for forming a synergistic fire retardant composition consisting essentially of the partial reaction product of water, phosphoric acid, boric acid, and dicyandiamide comprising heating with agitation at a temperature of between about 70.degree. C. and about 90.degree. C., water, phosphoric acid, and dicyandiamide until from about 80 to about 95 percent of the dicyandiamide and phosphoric acid has reacted and then adding the boric acid and cooling the resultant clear solution to ambient temperature, wherein water is employed as a solvent and the mole ratio of dicyandiamide to phosphoric acid is from about 1 to about 0.8-1.2 and the mole ratio of boric acid to combined dicyandiamide and phosphoric acid is from about 0.2-1.5 to about 1.
A process for forming a synergistic fire retardant composition consisting essentially of the partial reaction product of water, phosphoric acid, boric acid and dicyandiamide comprising heating with agitation at a temperature of between about 70.degree. C. and about 90.degree. C., water, boric acid, and dicyandiamide until from about 80 to about 95 percent of the dicyandiamide and boric acid has reacted and then adding the phosphoric acid and cooling the resultant clear solution to ambient temperature, wherein water is employed as a solvent and the mole ratio of dicyandiamide to phosphoric acid is from about 1 to about 0.8-1.2 and the mole ratio of boric acid to combined dicyandiamide and phosphoric acid is from about 0.2-1.5 to about 1.
A method of solubilizing precipitates formed from the reaction of dicyandiamide, phosphoric acid, boric acid and water, which comprises adding a minor but effective amount of an acid.
Dependencies are inferred from the claim text.