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AssigneeOwens-Corning Fiberglas Corporation
InventorsCarl R. Strauss, Richard D. Godfrey, Steven D. Crothers, Beverly A. Goudy, Kathryn L. Brandenburg, Roy E. Shafer
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Mineral fibers, and products (e.g., building insulation products) formed of mineral fibers are treated, and thus rendered fire-resistant, by placing a phosphate-containing compound onto or in close proximity to the mineral fibers. The phosphate-containing compound is at least one which forms a high-temperature protective coating or layer on the surfaces of the mineral fibers. A preferred product of the invention will include two mineral wool layers with a septum carrying the phosphate-containing compound interposed therebetween. Exemplary phosphate-containing compounds include monoammonium phosphate, diammonium phosphate, dicalcium phosphate, monocalcium phosphate, phosphoric acid, aluminum phosphate, tetrasodium pyrophosphate, tetrapotassium pyrophosphate, sodium hexametaphosphate, potassium tripolyphosphate, sodium tripolyphosphate, ammonium polyphosphate, monosodium dihydrogen phosphate, and mixtures thereof.
A fire-resistant building insulation product consisting essentially of mineral wool and dicalcium phosphate in close proximity to said mineral wool, said dicalcium phosphate being present in an amount sufficient to form a high temperature coating on at least a portion of the mineral wool in close proximity thereto so that when the insulation product is exposed to elevated temperatures normally melting untreated mineral wool, the formed high temperature coating enables the mineral wool portion to withstand such elevated temperatures without melting, whereby the product is rendered fire-resistant.
A fire-resistant building insulation product comprising a batting of glass wool having a fire-resistant layer which consists essentially of dicalcium phosphate in close proximity to said glass wool of said batting, wherein said dicalcium phosphate is present in an amount which provides at least about 0.0008 pounds of elemental phosphorus per square foot of said batting so as to form a high-temperature protective coating on the glass wool in close proximity to said layer when said product is exposed to temperatures greater than about 300.degree. C.
A fire-resistant mineral wool insulation product consisting essentially of at least two layers of mineral wool and a septum interposed therebetween, said septum carrying dicalcium phosphate in an amount which provides at least about 0.0008 pounds of elemental phosphorus per square foot of said septum so as to form a high-temperature protective coating on said mineral wool when said fire-resistant mineral wool insulation product is exposed to temperatures greater than about 300.degree. C., whereby said product is fire-protected.
A fire-resistant glass wool insulation product having a Class I rating and consisting essentially of at least two layers of glass wool batting and a substrate interposed therebetween, said substrate carrying dicalcium phosphate which renders said glass wool batting fire-resistant, wherein the dicalcium phosphate is present in an amount sufficient to provide at least about 0.0008 pounds of elemental phosphorus per square foot of the batting.
A fire-resistant building insulation product consisting essentially of glass wool and dicalcium phosphate in close proximity to said glass wool, said dicalcium phosphate being present in an amount greater than about 0.35 pounds per 100 square feet of said glass wool, said dicalcium phosphate rendering the glass wool fire-resistant by forming a high temperature phosphate compound in response to said building insulation product being exposed to an elevated temperature sufficient to thermally decompose said dicalcium phosphate, whereby said product is fire-resistant.
A fire-resistant building insulation product which consisting essentially of a glass fiber substrate, and dicalcium phosphate carried by said substrate and present in an amount greater than about 0.35 pounds per 100 square feet of said substrate.
Dependencies are inferred from the claim text.