The current invention concerns a method for producing an aqueous dispersion suitable for being used as a flame retardant additive to wood composite panels. At least one pH-regulator, at least one inorganic thickener, and optionally at least one smoke suppressing agent is added to a premix while maintaining the actuation of wet-milling systems until the dispersion is obtained.

The current invention concerns a method for producing an aqueous dispersion suitable for being used as a flame retardant additive to wood composite panels. At least one pH-regulator, at least one inorganic thickener, and optionally at least one smoke suppressing agent is added to a premix while maintaining the actuation of wet-milling systems until the dispersion is obtained.

A method for imparting flame retardancy to a substrate material. The method comprises adding to a substrate material a flame retardant composition. The flame retardant composition comprises at least one flame retardant salt, a nitrogen-containing compound, and optionally water. The at least one flame retardant salt comprises an ammonium salt of phosphoric acid. The ammonium salt of phosphoric acid comprises water soluble ammonium polyphosphate (APP). The water soluble ammonium polyphosphate has a total nitrogen as N from about 5 to about 15 weight percent, and a total phosphorus as P.sub.2O.sub.5 from about 30 to about 40 weight percent, based on the total weight of the ammonium polyphosphate (APP).

A method for imparting flame retardancy to a substrate material. The method comprises adding to a substrate material a flame retardant composition. The flame retardant composition comprises at least one flame retardant salt, a nitrogen-containing compound, and optionally water. The at least one flame retardant salt comprises an ammonium salt of phosphoric acid. The ammonium salt of phosphoric acid comprises water soluble ammonium polyphosphate (APP). The water soluble ammonium polyphosphate has a total nitrogen as N from about 5 to about 15 weight percent, and a total phosphorus as P.sub.2O.sub.5 from about 30 to about 40 weight percent, based on the total weight of the ammonium polyphosphate (APP).

A fire-stopping material for use in sandwich panels is provided, wherein the fire-stopping material comprises a resilient, porous material at least partially impregnated with an intumescent agent. A panel for an internal wall and an internal wall are also provided, comprising the fire-stopping material disposed between two substantially parallel boards, such as plaster boards. A method of providing a service penetration through an internal wall is also provided.

A fire-stopping material for use in sandwich panels is provided, wherein the fire-stopping material comprises a resilient, porous material at least partially impregnated with an intumescent agent. A panel for an internal wall and an internal wall are also provided, comprising the fire-stopping material disposed between two substantially parallel boards, such as plaster boards. A method of providing a service penetration through an internal wall is also provided.

A liquid composition including clay containing at least one selected from the group consisting of a montmorillonite, mica, hectorite, and fluorosilicate; and a dimer or higher phosphate is described. Such liquid compositions are capable of forming a fireproof layer having high fireproof performance on a surface of a base material to which a film for wallpaper or the like is applied. A fireproof layer which can be formed using the liquid composition, a laminated structure including the fireproof layer, and a fireproofing method using the liquid composition are also described.

A liquid composition including clay containing at least one selected from the group consisting of a montmorillonite, mica, hectorite, and fluorosilicate; and a dimer or higher phosphate is described. Such liquid compositions are capable of forming a fireproof layer having high fireproof performance on a surface of a base material to which a film for wallpaper or the like is applied. A fireproof layer which can be formed using the liquid composition, a laminated structure including the fireproof layer, and a fireproofing method using the liquid composition are also described.

The invention relates to mixtures containing, as component (A) ammonium polyphosphate and, as component (B) a soluble ionic compound which contains sulfate and/or is capable of releasing sulfate ions. The invention also relates to a method for producing such mixtures and to the use thereof.

The invention relates to mixtures containing, as component (A) ammonium polyphosphate and, as component (B) a soluble ionic compound which contains sulfate and/or is capable of releasing sulfate ions. The invention also relates to a method for producing such mixtures and to the use thereof.