Abstract: Non-blooming fire retardant compositions are disclosed comprising an ammonium phosphate-containing fire retardant and an effective amount of boric acid or an alkali metal borate. The ammonium phosphate-containing fire retardant preferably comprises the reaction mixture of aqueous phosphoric acid and an alkylene oxide. Preferably, the boric acid or alkali metal borate is present in an amount of from about 2.5% to about 12% by weight of solids in the phosphate-containing fire retardant. Such compositions are less susceptible to exudation of the fire retardant from treated wood panels during drying of the panels at elevated temperatures, and are particularly suitable for use in continuous treatment processes.

Abstract: A fire retarding composition is disclosed which is made from a reaction mixture of aqueous phosphoric acid and an alkylene oxide, wherein the weight ratio of oxide to acid reactants is within the range of about 0.01:1 to about 0.25:1. The composition produces improved fire retardancy when used to treat cellulosic material.

Abstract: An improved fire retardant polyester polymer system and composition comprising an interpolymer of a reaction product of hexachlorocyclopentadiene, a polyhydric alcohol, a carboxylic acid containing aliphatic carbon-to-carbon unsaturation, a styrene-type monomer, maleic acid or anhydride and a copolymerizable brominated neopentylacrylate comonomer.

Abstract: An improved process for imparting durable flame retardancy to textile materials wherein said material is impregnated with a solution having a poly(hydroxyorgano) phosphonium cation content of from about 10 to about 60 percent by weight and having a pH of from about 2 to about 9, dried to a moisture content of from about 0 to about 8 percent, aerated by passing air through the dried material, cured by polymerizing the monomer on and in the cellulose material with exposure in an enclosed chamber to an atmosphere containing gaseous ammonia and thereafter contacting with water, the improvement comprising, impregnating said textile materials with a nitrogen containing material, contiguous with impregnation with the poly(hydroxyorgano) phosphonium cation containing solution, and, after contacting said material with said water, further exposing said material to an atmosphere containing gaseous ammonia.

Abstract: A process for imparting flame retardant property to cellulosic containing materials comprising the steps;(1) treating the cellulosic containing material with a solution containing poly (hydroxy organo) phosphonium cation;(2) exposing the treated cellulosic material to an atmosphere containing ammonia to polymerize the phosphonium compound;(3) treating the cellulosic material containing the polymerized phosphonium compound with a solution containing a poly (hydroxy organo) phosphonium salt and a nitrogen containing compound copolymerizable with said phosphonium halide; and p1 (4) heat curing the phosphonium salt composition.

Abstract: An improved apparatus and process for imparting durable flame retardancy to textile materials wherein said material is impregnated with a solution having a poly(hydroxymethyl) phosphonium cation content of from about 10 to about 60 percent by weight, dried to a moisture content of from about 0 to about 8 percent, aerated by passing air through the dried material, cured by polymerizing the monomer on and in the textile material with exposure in an enclosed chamber to an atmosphere containing gaseous ammonia and thereafter contacting with water, the improvement comprising, impregnating said material with said solution containing poly(hydroxymethyl) phosphonium cation having a pH of from about 2 to about 9, and after contacting said material with said water, further exposing said material to an atmosphere containing gaseous ammonia.

Abstract: A method of imparting flame retardant character to cellulosic containing material by applying an effective fire retarding imparting amount of a phosphorous composition to the material and curing the phosphorous composition, the improvement comprising pretreating the material with an aqueous caustic solution prior to applying the phosphorous composition, wherein the material contains at least 20% polyester.

Abstract: An improved process for imparting durable flame retardancy to textile materials wherein said material is impregnated with a solution having a poly(hydroxymethyl) phosphonium cation content of from about 10 to about 60 percent by weight, dried to a moisture content of from about 0 to about 8 percent, aerated by passing air through the dried material, cured by polymerizing the monomer on and in the cellulose material with exposure in an enclosed chamber to an atmosphere containing gaseous ammonia and thereafter contacting with water, the improvement comprising, impregnating said material with a poly(hydroxymethyl) phosphonium cation containing solution and a basic catalyst, said solution having a pH of from about 2 to about 9, and after contacting said material with said water, further exposing said material to an atmosphere containing gaseous ammonia.

Abstract: An improved apparatus and process for imparting durable flame retardancy to textile materials wherein said material is impregnated with a solution having a poly(hydroxymethyl) phosphonium cation content of from about 10 to about 60 percent by weight, dried to a moisture content of from about 0 to about 8 percent, aerated by passing air through the dried material, cured by polymerizing the monomer on and in the cellulose material with exposure in an enclosed chamber to an atmosphere containing gaseous ammonia and thereafter contacting with water, the improvement comprising, impregnating said material with said solution containing poly(hydroxymethyl) phosphonium cation having a pH of from about 2 to about 9, and after contacting said material with said water, further exposing said material to an atmosphere containing gaseous ammonia.

Abstract: An apparatus for use in a process for imparting flame retardance to cellulose containing materials which comprises an enclosed chamber having means for introducing a treating gas into the chamber and maintaining the gas in a treatment chamber where it is in contact with a cellulosic textile material which has been introduced into the chamber and is passed therethrough. The chamber is readily adaptable to high speed commercial textile processing machinery.