초록 ▼

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%; 0-3

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.

대표청구항 ▼

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 lea

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, andwherein 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. 2. The mineral wool as claimed in claim 1, wherein the at least one phosphorus compound is at least one selected from the group consisting of: a) a molecule comprising a single phosphorus linked by a covalent bond to at least one carbon, strictly by means of an oxygen; andb) a molecule comprising a single phosphorus linked by a covalent bond directly to at least one carbon. 3. The mineral wool as claimed in claim 2, wherein said molecule comprising a single phosphorus linked by a covalent bond to at least one carbon, through an oxygen, is a phosphoric monoester, a phosphoric diester, a phosphoric triester, an unsubstituted phosphonic ester, or a phosphinic ester, or mixtures thereof; wherein the carbon-based groups of these esters are alkyl, aryl, acyl or hydroxyalkyl compounds. 4. The mineral wool as claimed in claim 2, wherein said molecule comprising a single phosphorus linked by a covalent bond directly to at least one carbon is an at least partially substituted phosphonic ester, or phosphinic ester, di ester, or tri ester, or a phosphinic acid, or mixtures thereof; wherein the various carbon-based groups of these substituted compounds are alkyl, aryl, acyl or hydroxyalkyl compounds. 5. The mineral wool as claimed in claim 1, wherein said coating comprises two or more phosphorous compounds selected from the group consisting of: compound a) a molecule comprising a single phosphorus linked by a covalent bond to at least one carbon, strictly by means of an oxygen; andcompound b) a molecule comprising a single phosphorus linked by a covalent bond directly to at least one carbon;wherein said compound a) and compound b) are identical or different, linked together by covalent bonds. 6. The mineral wool as claimed in claim 5, wherein said coating comprises a phosphorus compound which is an oligomer or polymer molecule, of which the number of constituent units is between 2 and 100. 7. The mineral wool as claimed in claim 5, wherein said coating comprises a phosphorus compound comprising predominantly phosphorus atoms linked together by a covalent bond via a carbon-based entity. 8. The mineral wool as claimed in claim 7, wherein said coating comprises a phosphorus compound represented by formula (1): wherein:n is between 1 and 100; andthe substituents R1 to R4 are identical or different and are predominantly carbon-based entities comprising at least one branched alkyl, aryl, acyl or hydroxyalkyl group. 9. The mineral wool as claimed in claim 8, wherein said coating comprises a phosphorus compound which is a phosphonic polyester oligomer or polymer represented by formula (2): wherein:the chain length n is between 1 and 100; andthe substituents R2 and R5 to R7 are identical or different and are predominantly carbon-based entities comprising at least one branched alkyl, aryl, acyl or hydroxyalkyl group. 10. The mineral wool as claimed in claim 8, wherein said coating comprises a phosphorus compound is a phosphoric polyacid or polyester oligomer or polymer represented by formula (3): wherein:the chain length n is between 1 and 100; andthe substituents R5 to R8 are identical or different and are predominantly carbon-based entities comprising at least one branched alkyl, aryl, acyl or hydroxyalkyl group. 11. The mineral wool as claimed in claim 4, wherein said at least one phosphorus compound is obtained by a process comprising esterifying or transesterifying acids or esters, that are phosphonic and phosphoric respectively, and polyols polyacids or epoxy compounds. 12. The mineral wool as claimed in claim 11, wherein said at least one phosphorus compound is obtained by a process comprising reacting molasses and the phosphoric or phosphonic acids or esters. 13. A mineral wool as claimed in claim 1, wherein the fibers comprise the following constituents in percentages by weight: Si02 39-55%,Al2O3 16-27%,CaO 3-35%,MgO 0-15%,Na2O 0-15%,K2O 0-15%,R2O (Na2O +K2O) 10-17%,P2O5 0-5%,Fe2O3 0-15%,B2O3 0-8%,TiO2 0-3%,wherein MgO is between 0 and 5% when R2O 5 13.0%. 14. The mineral wool as claimed in claim 1, wherein the fibers comprise the following constituents in percentages by weight: SiO2 39-55%,Al2O3 16-27%,CaO 6-20%,MgO 1-5%,Na2O 0-15%,K2O 0-15%,R2O (Na2O +K2O) 10-14.7%,P2O5 0-3%,Fe2O3 (Total Iron) 1.5-15%,B2O3 0-2%,TiO2 0-2%. 15. The mineral wool as claimed in claim 1, wherein the CaO content is 9.5 to 20%. 16. The mineral wool as claimed in claim 1, comprising 20 to 25% alumina. 17. A mineral wool as claimed in claim 1, comprising at least 2% MgO when the alumina is present in an amount of less than 22%, and comprising 1 to 4%, MgO when the alumina is present in an amount of at least 22% by weight. 18. The mineral wool as claimed in claim 1, wherein the alkaline metal content is less than or equal to 13.0%. 19. The mineral wool as claimed in claim 1, wherein the R2O/Al2O3 molar ratio is less than 0.9. 20. The mineral wool as claimed in claim 1, comprising 2 to 6% iron oxide. 21. The mineral wool as claimed in claim 1, comprising 1% titanium oxide or less. 22. The mineral wool as claimed in claim 1, wherein the fibers have a rate of dissolution of at least 30 ng/cm2 per hour measured at pH 4.5. 23. The mineral wool as claimed in claim 1, wherein the glass of the fibers may be fiberized by the internal centrifugal process. 24. The mineral wool as claimed in claim 1, wherein the coating consists essentially of an alkaline-earth metal phosphate. 25. The mineral wool as claimed in claim 24, wherein the alkaline-earth metal phosphate is a lime phosphate. 26. A process for obtaining mineral wool as claimed in claim 1, comprising a step of fiber-forming followed by a step of supplying at least one phosphorus compound onto the surface of said fibers. 27. A fire-resistant structural system comprising the mineral wool as claimed in claim 1. 28. A thermal and/or acoustic insulation product comprising at least one mineral wool as claimed in claim 1. 29. The mineral wool as claimed in claim 3, wherein the carbon-based groups of said esters are oligomeric or polymeric. 30. The mineral wool as claimed in claim 3, wherein the carbon-based groups of said esters further comprise at least one heteroatom selected from the group consisting of N, O and S. 31. The mineral wool as claimed in claim 4, wherein the carbon-based groups of said esters are oligomeric or polymeric. 32. The mineral wool as claimed in claim 4, wherein the carbon-based groups of said esters further comprise at least one heteroatom selected from the group consisting of N, O and S. 33. The mineral wool as claimed in claim 1, wherein the coating consists essentially of the phosphorus compound or a mixture of phosphorous compounds.