Treatment of flammable materials to impart flame resistance thereto, compositions therefor, and products thereof

Claim 1

THE METHOD WHICH COMPRISES IMPREGNATING A TEXTILE MATERIAL TO BE RENDERED FLAME-RESISTANT WITH AN AQUEOUS COMPOSITION CONTAINING THE FOLLOWING INITIAL INGREDIENTS IN THE SPECIFIED PROPORTIONS BY WEIGHT: (1) FROM 2 TO 20 PARTS OF A HEAT-CURABLE MEMBER OF THE CLASS CONSISTING OF METHYLOL, MELAMINES, METHYLATED METHYLOL MELAMINES, METHYLOL UREAS, METHYLATED METHYLOL UREAS, MIXTURES THEREOF, AND WATER-SOLUBLE REACTION PRODUCTS AND PHOSPHORIC ACID-SOLUBLE REACTION PRODUCTS OF THE SAID METHYLOL COMPOUNDS AND OF MIXTURES OF THE SAID METHYLOL COMPOUNDS; (2) FROM 10 TO 35 PARTS OF A METHYLOL DICYANDIAMIDE; AND (3) AN OXYGEN-CONTAINING ACID OF PHOSPHORUS IN AN AMOUNT WHICH IS EQUIVALENT, BASED ON PHOSPHORUS CONTENT, TO FROM 5 TO 30 PARTS OF 85% H3PO4; DRYING THE IMPREGNATED TEXTILE FOLLOWED BY HEATING THE DRIED TEXTILE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 250* F. TO ABOUT 400* F.; AND REMOVING ANY RESIDUAL WATERSOLUBLE SUBSTANCES FROM THE RESULTING TEXTILE.