Patent ID: 7638447

Claim:
Mineral wool capable of dissolving in a physiological medium, wherein the wool comprises the constituents below in the following percentages by weight: SiO 2 39-44%, Al 2 O 3 16-27%, CaO 6-20%, MgO 1-5%, Na 2 O 0-15%, K 2 O 0-15% R 2 O (Na 2 O+K 2 O) 10-14.7%, P 2 O 5 0-3%, Fe 2 O 3 (total iron) 1.5-15%, B 2 O 3 0-2%, TiO 2 0-2%, wherein the wool comprises at least 2% MgO when alumina is present in an amount of less than 22%.