Mineral wool, insulating product and production method

Details Mineral wool, insulating product and production method Mineral wool, insulating product and production method

C - Chemistry, Metallurgy

03

C

C03C 25/42 (2006.01) C03C 13/00 (2006.01) C03C 25/14 (2006.01) C03C 25/26 (2006.01) C03C 25/34 (2006.01)

Patent

CA 2603292

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.

L'invention a pour objet une laine minérale, stable thermiquement, susceptible de se dissoudre dans un milieu physiologique, comprenant des fibres dont les constituants sont mentionnés ci-après, selon les pourcentages pondéraux suivants : SiO2 35-60 %, de préférence 39-55 % AI2O3 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%, et au moins un composé du phosphore susceptible de réagir à une température inférieure à 10000C avec lesdites fibres pour former un revêtement à la surface desdites fibres, caractérisée en ce que la teneur dudit composé du phosphore, exprimée en masse d'atomes de phosphore, varie de 0,0005 %, notamment plus de 0,01 % à 1 %, notamment moins de 0,5 % de la masse totale des fibres, et en ce qu'un composé du phosphore est une molécule dans laquelle le ou les atome(s) de phosphore est (sont) lié(s) à au moins un atome de carbone, directement ou par le biais d'un atome d'oxygène.

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