Patent ID: 8877102

Claim:
A mineral wool in the form of a mat, comprising fibers whose constituents are mentioned below, in the following percentages by weight: SiO 2 35-60%, Al 2 O 3 12-27%, CaO 0-35%, MgO 0-30%, Na 2 O 0-17%, K 2 O 0-17%, R 2 O (Na 2 O +K 2 O) 10-17%, P 2 O 5 0-5%, Fe 2 O 3 0-20%, B 2 O 3 0-8%, TiO 2 0-3%, and a coating comprising at least one phosphorus compound capable of reacting at a temperature below 1000° C. with said fibers, wherein said mineral wool in the form of a mat is obtained by a process comprising spraying the at least one phosphorus compound onto the fibers during fiberizing and subsequently collecting the mineral wool, wherein said coating covers at least a portion of the surface of said fibers, wherein the phosphorus compound comprises at least one phosphorus linked by a covalent bond to at least one carbon, directly or via an oxygen, and wherein the mineral wool comprises the at least one phosphorous compound in an amount, expressed by weight of phosphorus atoms, of from 0.0005% to 1% of the total mass of the fibers.