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...http://www.google.co.uk/patents/US5284700?utm_source=gb-gplus-sharePatent US5284700 - Fire-resistant mineral fibers, structures employing such mineral fibers and processes for forming same
