Man-made vitreous fibres has a solubility at pH 4.5 of at least 20 nm per day and a melt viscosity of 10-70 poise at 1,400 °C and are formed from a composition which includes 18 to 30 % by weight Al2O3.

Man-made vitreous fibres

The invention relates to a mineral wool which can be dissolved in a physiological medium and which comprises the following constituents according to the following percentages by weight: SiO2 39-44%, preferably 40-43%, A12O3 16-27%, preferably 16-26%, CaO 6 -20%, preferably 8-18%, MgO 1-5%, preferably 1-4,9%, Na2O 0-15%, preferably 2-12%, K2O 0-15%, preferably 2-12%, R2O (Na2O + K2O) 10-14,7%, preferably 10-13.5% P2O5 0-3%, i.e.0-2% Fe2O3 (total iron) 1,.5-15%, i.e.3,2-8%, B2O3 0-2%, preferably 0-1%, TiO2 0-2%, preferably 0.4-1%.

Mineral wool composition

Disclosed is use of a vitreous inorganic fibre in the knowledge that it has a composition meeting the criterion that the calculated sum of the free energies of hydration of the compounds that would or could be present at equilibrium (on the basis of knowledge, informed belief or reasonable assumption) is more negative than -10 kcal/100 grams of composition. Such compositions are saline soluble.

Saline soluble inorganic fibres

Compound or salts thereof suitable for use as a binder for mineral fibres, for example glass or stone wool, said compound comprising: a carboxylic acid group, and/or, a β-hydroxyalkyl amide group

Compound for use as a mineral fibre binder and process for providing such

The production and physiological dissolution rate of mineral wool formed of MMV fibres containing 35-66 % SiO2, up to 10 % Al2O3, 10-45 % CaO, 2-30 % MgO, up to 10 % FeO, 0-7 % Na2O + K2O and 0-10 % TiO2 is improved by including both P2O5 and B2O3 in the composition.

Man-made vitreous fiber wool

The present invention relates to compositions of mineral fibres capable of being dissolved in a physiological medium. The compositions of said fibres comprise the following constituants, in the weight proportions defined hereafter: SiO2 48 - 67 %; Al2O3 0 - 8 %; Fe2O3 0 - 12 % (total iron expressed in this form); CaO 16 - 35 %; MgO 1 - 16 %; Na2O + K2O 0 - 6,5 %; P2O5 0 - 5 %; considering that these compositions are also defined by the fact that the contents of said constituants respect the following relationships: Na2O + P2O5 » 2 %; Fe2O3 + Al2O3 « 12 %; CaO + MgO + Fe2O3 » 23 %.

Mineral fibres capable of dissolving in a physiological medium

La presente invention concerne des compositions de fibres minerales susceptibles de se dissoudre au contact d'un milieu physiologique. Les compositions de ces fibres comprennent les constituants suivants, selon les proportions ponderales definies ci-apres: SiO2 48 a 67 %, Al2O3 0 a 8 %, Fe2O3 0 a 12 % (fer total exprime sous cette forme), CaO 16 a 35 %, MgO 1 a 16 %, Na2O + K2O 0 a 6,5 %, P2O5 0 a 5 %, en considerant que ces compositions sont egalement definies par le fait que les teneurs de ces constituants respectent les relations suivantes: Na2O + P2O5 2 %, Fe2O3 + Al2O3 12 %, CaO + MgO + Fe2O3 23 %.

Fibres minerales susceptibles de se dissoudre en milieu physiologique

The present invention relates to mineral fiber composition which can dissolve in contact with a physiological medium. The composition of these fibers includes the following components, in accordance with the following proportions by weight: ______________________________________ SiO 2 48 to 67% Al 2 O 3 0 to 8% Fe 2 O 3 0 to 12%______________________________________ (total iron expressed in this form)______________________________________ CaO 16 to 35% MgO 1 to 16% Na 2 O + K 2 O 0 to 6.5% P 2 O 5 0 to 5%______________________________________ taking into consideration that these compositions are also defined by the fact that the contents of these components comply with the following ratios: Na.sub.2 O+P.sub.2 O.sub.5 ≧2% Fe.sub.2 O.sub.3 +Al.sub.2 O.sub.3 ≦12% CaO+MgO+Fe.sub.2 O.sub.3 ≧23%.

Mineral fibres which can dissolve in a physiological medium

A biologically degradable mineral-fiber composition characterized by the following constituents in percent by weight: SiO2: 40 to less than 52; Al2O3: less than 4; CaO: more than 25 and up to 45; MgO: 5 to 15; BaO: 0 to 7; Na2O: 2 to 12; K2O: 0 to 10; Na2O + K2O: 2 to 15; TiO2, Fe2O3, MnO: 0 to 5.

Mineral-fiber compositions

The invention relates to a biodegradable mineral-fiber composition with the following components in percent by weight: SiO2 51.5 to 57.0, Al2O3≤2.0, Fe2O3≤1.5, CaO 28.0 to 33.0, MgO 8.0 to 11.0, Na2O 2.4 to 4.4, K2O≤2.0 wherein the weight ratio SiO2/(Na2O + K2O) is in the range of 12.5 to 20.0 and the viscosity log θ [dPas] of 1.25 is at a temperature of 1340 to 1350 °C or more, and the sum of proportions by weight of the oxides of sodium, potassium, boron, calcium, magnesium and barium minus two times the proportion by weight of aluminum oxide (CI index) is in the range of 40 to 42.

A biodegradable mineral-fiber composition

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