Composition and method for making fire-retardant materials
OwnerRichard A. Lopezinventor
Life of this patent
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Abstract
Fire-retardant compositions are disclosed. The compositions include at least one nitrogen-liberating compound which will release nitrogen gas during burning, a primary fire-retardant agent; casein resin, and an activator of the casein resin. In the preferred embodiment, there are two nitrogen-liberating compounds, dicyandiamide and nitro-urea, the primary fire-retardant agent is diammonium phosphate, and a filler, titanium dioxide, is also included. The compositions are prepared in a mixing tank and can be applied in a known manner, optionally under high pressure, to cellulosic products such as cloth, yarn, paper, wood and wood substrates in order to impart a fire-retardant quality thereto. Fire-retardant glue and wood laminate structures produced using the glue are also disclosed.
Claims34
A fire retardant composition which is noncorrosive to metal, and dries at ambient temperatures, comprising:
- dicyandiamide and urea-nitro for releasing nitrogen gas in the presence of flame;
- an ammonium phosphate compound;
- a urea/formaldehyde resin polymer in water;
- and
- an activator of the resin, said activator comprising melamine and an acid salt catalyst.
A process for preparing a fire-retardant composition without the use of a high heat drying process, comprising:
- providing a mixing tank;
- adding to the mixing tank dicyandiamide and urea-nitro for releasing nitrogen gas in the presence of flame;
- adding to the mixing tank an ammonium phosphate compound;
- adding a urea/formaldehyde resin polymer in water to the mixing tank;
- activating the resin in the mixing tank by adding an activator, said activator comprising melamine and an acid salt catalyst;
- and
- mixing the contents of the mixing tank until a smooth chemical blend is obtained.
Dependencies are inferred from the claim text.