Aqueous dispersions and methods of preparing the same

Claim 1

AN AQUEOUS DISPERSION WHICH IS ADAPTED FOR USE IN IMPARTING FLAME-RESISTING CHARACTERISTICS TO COTTON CLOTH AND OTHER FIBROUS CELLULOSIC MATERIALS OF THE CLASS CONSISTING OF NATURAL AND REGENERATED CELLULOSES AND MIXTUES THEREOF, SAID DISPERSION COMPRISING WATER AND INGREDIENTS COMPRISING (1) A FINELY DIVIDED, OXYGEN-CONTAINING SUBSTANCE OF THE GROUP CONSISTING OF TIN, TITANIUM, ANTIMONY AND BISMUTH OXIDES AND MIXTURES THEREOF 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 FORM 0.6 TO 20 PARTS OF THE LATTER AND BEING DISPERSED IN WATER CONTAINING INGREDIENTS INITIALLY IN THE FORM OF (3) A WATER-SOLUBLE SALT OF OXYGEN-CONTAINING ACID OF PHOSPHORUS WHEREIN THE PHOSPHORUS ATOM HAS A VALENCE OF 5 AND (4) A WATER-SOLUBLE NITROGENUS SUBSTANCE OF THE GRUP CONSISTING OF UREA, BIURET, AMMONIUM CYANATE, AMMONIUM DICYANIMIDE AND MIXTURES THEREOF, THE INGREDIENTS OF (3) AND (4), WHICH TOGETHER ARE DESIGNATED HREINAFTER AS (B), BEING EMPLOYED IN A WEIGHT RATIO OF 1 PART OF THE FORMER CALCULATED AS H3PO4 TO FROM 1 TO 20 PARTS OF THE LATTER, AND THE INGREDIENTS OF (A) AND (B) BEING EMPLOYED IN A WEIGHT RATIO OF 1 PART OF THE FORMER TO FROM 0.2 TO 8 PARTS OF THE LATTER, SAID DISPERSION ALSO CONTAINING AMMONIUM HYDROXIDE IN AN AMOUNT CORRESPONDING TO NOT LESS THAN ABOUT 4% BY WEIGHT THEREOF OF AMMONIUM HYDROXIDE CONTAINING APPROXIMATELY 28% NH3, THE TOTAL AMOUNT OF WATER WHICH IS PRESENT IN THE SAID DISPERSION, INCLUDING THAT WHICH IS PRESENT IN COMBINATION WITH AMMONIA IN THE FORM OF AMMONIUM HYDROXIDE, BEING FROM ABOUT 15% TO ABOUT 35% BY WEIGHT OF THE DISPERSION.