Mineral wool composition
AssigneeSaint-Gobain Isover
InventorsJean-Luc Bernard, Serge Vignesoult, Patrice Lehuede
Life of this patent
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Abstract
Mineral wool capable of dissolving in a physiological medium, and which comprises fibers whose constituents are mentioned below in the following percentages by weight: SiO2 35-60%, preferably 39-55% Al2O3 12-27%, ″ 16-25% CaO 0-35%, ″ 3-25% MgO 0-30%, ″ 0-15% Na2O 0-17%, ″ 6-12% K2O 0-17%, ″ 3-12% R2O (Na2O + K2O) 10-17%, ″ 12-17% P2O5 0-5%, ″ 0-2% Fe2O3 0-20%, B2O3 0-8%, ″ 0-4% TiO2 0-3%, and also comprises a phosphorus compound, the phosphorus content of which, expressed in P2O5 form, varies from 0.2%, especially from more than 0.5%, to 5%, especially to less than 2%, of the total mass of fibers, which is capable of reacting above 100° C. with the fibers to form a coating on the surface of the fibers.
Claims36
A thermally stable mineral wool capable of dissolving in a physiological medium, said mineral wool comprising fibers comprising:
- SiO2 in an amount of from 35 to 60%,
- Al2O3 in an amount of from 12 to 27%,
- CaO in an amount of from 0 to 35%,
- MgO in an amount of from 0 to 30%,
- Na2O in an amount of from 0 to 17%,
- K2O in an amount of from 0 to 17%,
- R2O (Na2O+K2) in an amount of from 10 to 17%,
- P2O5 in an amount of from 0 to 5%,
- Fe2O3 in an amount of from 0 to 20%,
- B2O3 in an amount of from 0 to 8%, and
- TiO2 in an amount of from 0 to 3%,
- wherein % is percent by weight,
- wherein a phosphorus compound is present, said phosphorous compound having a phosphorus content, expressed in P2O5 form, from 0.2% to 5% of the total mass of fibers, wherein said phosphorous compound is capable of reacting above 100° C. with the fibers, to form a coating on the surface of the fibers.
A process for manufacturing mineral wool, comprising
- forming a plurality of fibers from a molten oxide, wherein the molten oxide comprises
- SiO2 in an amount of from 35 to 60%,
- Al2O3 in an amount of from 12 to 27%,
- CaO in an amount of from 0 to 35%,
- MgO in an amount of from 0 to 30%,
- Na2O in an amount of from 0 to 17%,
- K2O in an amount of from 0 to 17%,
- R2O (Na2O+K2O) in an amount of from 10 to 17%,
- P2O5 in an amount of from 0 to 5%,
- Fe2O3 in an amount of from 0 to 20%,
- B2O3 in an amount of from 0 to 8%, and
- TiO2 in an amount of from 0 to 3%,
- and
- applying a phosphorus compound capable of reacting with the fibers to form a coating on the surface of the fibers, and
- wherein the phosphate compound is added in an amount that results in a phosphorus content, expressed in P2O5 form, from 0.2% to 5% of the total mass of fibers.
Dependencies are inferred from the claim text.