초록 ▼

A flame-proof product comprising a cellulosic base, and particularly a wood based product having at least one surface treated with a composition which when the surface is subjected to fire or high temperatures combines with some of the material of the base to form a protective intumescent coating on

A flame-proof product comprising a cellulosic base, and particularly a wood based product having at least one surface treated with a composition which when the surface is subjected to fire or high temperatures combines with some of the material of the base to form a protective intumescent coating on the surface which insulates the remainder of the product from thermal destruction. The treating composition includes potassium hydroxide and/or potassium carbonate alone or mixed with a comparatively small amount of sodium hydroxide and/or sodium carbonate. The composition may in addition include potassium chloride, or potassium acetate, or potassium citrate, or potassium bicarbonate, or potassium bisulfite, or potassium metaphosphate, or potassium nitrite, or potassium sulfide, or potassium sulfite, or potassium thiosulfate, or potassium phosphate (tribasic).

대표청구항 ▼

A flame-proof product comprising a cellulosic or wood base substrate having at its surface at least one fire retardant chemical compound selected from the group consisting of potassium hydroxide and potassium carbonate, said compound being provided at said surface in an amount of at least 75% by wei

A flame-proof product comprising a cellulosic or wood base substrate having at its surface at least one fire retardant chemical compound selected from the group consisting of potassium hydroxide and potassium carbonate, said compound being provided at said surface in an amount of at least 75% by weight based on the total weight of fire retardant chemicals applied to said surface by drying a solution of said compound applied thereto, the amount of said compound at said surface being sufficient such that when said surface is subjected to high temperatures, said surface foams with decomposing cellulosic material to form a layer of relatively noncombustible intumescent carboniferous char.