Mineral wool, insulating product and production method

摘要

The invention relates to thermally-stable mineral wool which can dissolve in a physiological medium, comprising fibres containing the following constituents, expressed in percentage by weight, namely: 35-60 % SiO2, preferably 39-55 %; 12-27% Al2O3, preferably 16-25%; 0-35% CaO, preferably 3-25%; 0-30% MgO, preferably 0-15%; 0-17% Na2O, preferably 6-12%; 0-17% K2O, preferably 3-12%; 10-17% R2O (Na2O+K2O), preferably 12-17%; 0-5% P2O5, preferably 0-2%; 0-20% Fe2O3; 0-8% B2O3, preferably 0-4%; and 0-3% TiO2, and at least one phosphorous compound that can react with said fibres at a temperature of less than 1000° C. in order to form a coating on the surface thereof. The invention is characterised in that the phosphorous content of said compound, as expressed in phosphorus atom weight, varies between 0.0005%, in particular more than 0.01%, and 1%, in particular less than 0.5%, of the total weight of the fibres. The invention is also characterised in that a phosphorus compound is a molecule in which the phosphorus atom(s) are bound to at least one carbon atom either directly or by means of an oxygen atom.

主权项

1. A mineral wool in the form of a mat, comprising fibers whose constituents are mentioned below, in the following percentages by weight:
SiO2 35-60%, Al2O3 12-27%, CaO 0-35%, MgO 0-30%, Na2O 0-17%, K2O 0-17%, R2O (Na2O +K2O) 10-17%, P2O5 0-5%, Fe2O3 0-20%, B2O3 0-8%, TiO2 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.