Method of treating fibrous cellulosic materials to impart flame resistance thereto, composition therefor, and products thereof

Claim 1

A METHOD OF IMPARTMENT FLAME-RESISTANCE TO A CELLULOSE TEXTILE MATERIAL OF THE CLASS CONSISTING OF NATURAL CELLULOSES, REGENERATED CELLULOSES AND MIXTURES THEREOF, WHICH COMPRISES IMPREGNATING SAID MATERIAL WITH AN ASSOCIATION OF AN AQUEOUS LIQUID COMPOSITION CONTAINING INGREDIENTS COMPRISING (1) A FINELY DIVIDED OXIDE OF A METAL OF THE GROUP CONSISTING OF ANTIMONY, BISMUTH, TIN AND TITANIUM AND (2) A THERMOPLASTIC SUBSTANCE CONTAINING AT LEAST 20% BY WEIGHT OF COMBINED HALOGEN AND CAPABLE OF RUPTURING UNDER HEAT AT CARBON-HALOGEN BONDS, THE INGREDIENTS OF (1) AND (2) WHICH TOGETHER ARE DESIGNATED HEREINAFTER AS (A) BEING EMPLOYED IN A WEIGHT RATIO OF 1 PART OF THE FORMER TO FROM 0.6-20 PARTS OF THELATTER, AND OF AN AQUEOUS LIQUID COMPOSITION CONTAINING AN INGREDIENT COMPRISING (B) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE GUANIDINE AND GUANYLUREA SALTS OF AN OXYGEN-CONTAINING POLYACID OF PHOSPHORUS WHEREIN THE PHOSPHORUS ATOM HAS A VALENCE OF 5, THE INGREDENTS OF (A) AND (B) BEING EMPLOYED IN A WEIGHT RATIO OF 1 PART OF THE FORMER TO FROM 0.2-8 PARTS OF THE LATTER, THE AQUEOUS COMPOSITION CONTAINING THE INGREDIENT (B) HAVING A PH OF FROM ABOUT 3 TO ABOUT 7; HEATING THE IMPREGNATED MATERIAL AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 135*-200* C.; AND WASHING THE RESULTING MATERIAL TO REMOVE ANY RE-, SIDUAL WATER-SOLUBLE SUBSTANCES THEREFROM, THE TOTAL AMOUNT OF THE INGREDIENTS OF (A) AND (B) WITH WHICH THE CELLULOSE TEXTILE MATERIAL INITIALLY IS IMPREGNATED BEING SUCH THAT THE FINISHED FLAME-RESISTANT TEXTILE CONTAINS FROM ABOUT 10% TO ABOUT 75% BY WEIGHT, BASED ON THE DRY WEIGHT OF THE UNTREATED TEXTILE, OF WASH-FAST IMPREGNANT.

Claim 2

A METHOD OF IMPARTMENT FLAME-RESISTANCE TO A CELLULOSE TEXTILE MATERIAL OF THE CLASS CONSISTING OF NATURAL CELLULOSES, REGENERATED CELLULOSES AND MIXTURES THEREOF, WHICH COMPRISES IMPREGNATING SAID MATERIAL WITH AN ASSOCIATION OF AN AQUEOUS LIQUID COMPOSITION CONTAINING INGREDIENTS COMPRISING (1) A FINELY DIVIDED OXIDE OF A METAL OF THE GROUP CONSISTING OF ANTIMONY, BISMUTH, TIN AND TITANIUM AND (2) A THERMOPLASTIC SUBSTANCE CONTAINING AT LEAST 20% BY WEIGHT OF COMBINED HALOGEN AND CAPABLE OF RUPTURING UNDER HEAT AT CARBON-HALOGEN BONDS, THE INGREDIENTS OF (1) AND (2) WHICH TOGETHER ARE DESIGNATED HEREINAFTER AS (A) BEING EMPLOYED IN A WEIGHT RATIO OF 1 PART OF THE FORMER TO FROM 0.6-20 PARTS OF THELATTER, AND OF AN AQUEOUS LIQUID COMPOSITION CONTAINING AN INGREDIENT COMPRISING (B) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE GUANIDINE AND GUANYLUREA SALTS OF AN OXYGEN-CONTAINING POLYACID OF PHOSPHORUS WHEREIN THE PHOSPHORUS ATOM HAS A VALENCE OF 5, THE INGREDENTS OF (A) AND (B) BEING EMPLOYED IN A WEIGHT RATIO OF 1 PART OF THE FORMER TO FROM 0.2-8 PARTS OF THE LATTER, THE AQUEOUS COMPOSITION CONTAINING THE INGREDIENT (B) HAVING A PH OF FROM ABOUT 3 TO ABOUT 7; HEATING THE IMPREGNATED MATERIAL AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 135*-200* C.; AND WASHING THE RESULTING MATERIAL TO REMOVE ANY RE-, SIDUAL WATER-SOLUBLE SUBSTANCES THEREFROM, THE TOTAL AMOUNT OF THE INGREDIENTS OF (A) AND (B) WITH WHICH THE CELLULOSE TEXTILE MATERIAL INITIALLY IS IMPREGNATED BEING SUCH THAT THE FINISHED FLAME-RESISTANT TEXTILE CONTAINS FROM ABOUT 10% TO ABOUT 75% BY WEIGHT, BASED ON THE DRY WEIGHT OF THE UNTREATED TEXTILE, OF WASH-FAST IMPREGNANT.