WO2024175601A1 - Laine minerale - Google Patents
Laine minerale Download PDFInfo
- Publication number
- WO2024175601A1 WO2024175601A1 PCT/EP2024/054304 EP2024054304W WO2024175601A1 WO 2024175601 A1 WO2024175601 A1 WO 2024175601A1 EP 2024054304 W EP2024054304 W EP 2024054304W WO 2024175601 A1 WO2024175601 A1 WO 2024175601A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mineral wool
- mgo
- less
- content
- cao
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
Definitions
- the present invention relates to the field of artificial mineral wools. It relates more particularly to mineral wools intended for manufacturing thermal insulation materials. It is particularly interested in mineral wools for fire protection applications.
- this type of mineral wool is fiberized by so-called “external” centrifugation processes, for example of the type using a cascade of centrifugation wheels fed with molten material by a static distribution device, as described in particular in patents EP 0465310 or EP 0439385.
- the fire resistance of a construction element corresponds to the duration during which the element retains its load-bearing function, guarantees flame-tightness and retains its role as thermal insulation.
- the test Standard fire generally consists of a temperature rise following the ISO 834 standard, based on the temperature curve of a cellulosic fire.
- WO 2020/065191 describes mineral wool compositions having improved high temperature resistance properties while retaining rheological properties suitable for internal centrifugation processes.
- spinel crystals can form at fiberizing temperatures in these compositions. The presence of these crystals can cause the orifices of the fiberizing members to become blocked and affect the efficiency of the fiberizing and/or the service life of the fiberizing members.
- the objective of the present invention is to propose mineral wool compositions which are both fibrable by internal centrifugation processes, generating little or no spinels at fiberizing temperatures, and capable of being biosoluble and resistant to very high temperatures without resorting to organic phosphate additives.
- the fiberizing process using these methods is optimal when the molten material has a viscosity of 10 3 poises.
- the fiberizing temperature at which this viscosity must be reached (Tnb-Tiogs) must be less than 1220° C.
- Tf ⁇ b the fiberizing temperature
- Tüq the liquidus temperature
- the invention relates to a mineral wool having a chemical composition comprising the following constituents, in weight percentages:
- AI2O3 19.5-24.0%, preferably 20-23%
- MgO 1-5% preferably 2-5%
- B2O3 0-2% preferably 0-1.5% a MgO/RO mass ratio greater than 0.10 and less than 0.50, preferably less than 0.40, or even less than 0.30, a RO/(RO+R2O) mass ratio less than 0.60, a (Na2O+MgO)/CaO mass ratio greater than 0.8 and less than 1.4, and a mass ratio (MgO+Al2Os)/Fe2O3 of less than 5.0, in which RO represents the alkaline earth oxides CaO, MgO, BaO and SrO, and R2O represents the alkali oxides Na2O and K2O.
- RO represents the alkaline earth oxides CaO, MgO, BaO and SrO
- R2O represents the alkali oxides Na2O and K2O.
- compositions exhibit significantly improved very high temperature resistance properties while retaining sought-after biosolubility and processability properties (Tfib ⁇ Ti og 3 less than 1220 0 C, Tiiq less than 1180° C and Tnb-Tiiq greater than 35° C, little or no spinels).
- magnesia a relatively low alumina content (less than 24.0%)
- well-defined balances between alkaline earth oxides and alkaline oxides (0.10 ⁇ MgO/RO ⁇ 0.50, RO/(RO+R2O) ⁇ 0.60 and 0.8 ⁇ (Na2O+MgO)/CaO ⁇ 1.4)
- magnesia and iron oxide ((Mg0+Al203)/Fe203 ⁇ 5.0).
- the invention also relates to a thermal and/or sound insulation product comprising a mineral wool described above.
- the invention also relates to the use of the mineral wool described above in fire-resistant construction systems.
- the sum of the contents of SiC>2, AI2O3, CaO, MgO, Na2O, K2O, Fe2O3 and B2O3 preferably represents at least 95%, in particular at least 97%, or even at least 98% by weight of the mineral wool composition.
- the silica (SiO2) content is in the range from 39 to 50%, in particular 49%, or even 48%. A content greater than 50% can reduce the biosolubility of the mineral fibers. A content less than 39% can adversely affect the viscosity of the composition at fiberizing temperatures.
- the alumina (AI2O3) content is in a range from 19.5 to 24.0%, in particular from 20.0%, or even 21% to 23.5%, or even 23.0%.
- a content greater than 24% can promote the formation of spinels at fiberizing temperatures.
- a content less than 19.5% can adversely affect the viscosity of the composition at fiberizing temperatures.
- the lime (CaO) content is in the range of 8 to 15%, in particular 9%, or even 10%, or 10.5% to 14%. Contents lower than 8% can increase the liquidus temperature.
- the magnesia (MgO) content is in a range from 1% (or 1.0%) to 5%, in particular from 1.5%, or even 2%, to 4%, or even 3%. MgO contributes to the resistance to very high temperatures. This relatively high MgO content also makes it possible to integrate a greater proportion of recycled materials, for example from mineral wool waste, such as deconstruction waste, including in particular rock wool.
- Mineral wool does not generally contain any alkaline earth oxides other than CaO and MgO. However, it may contain small amounts of BaO or SrO, each at levels of up to 2% or even 1%, 0.20% or even 0.1%, these oxides being able to be present as impurities in certain raw materials.
- the ratio between magnesium oxide and the sum of the alkaline earth oxides RO (CaO, MgO, BaO and SrO): MgO/RO is greater than 0.10 and less than 0.50, in particular from 0.11, or even 0.12 to 0.40, or even 0.38, 0.35 or even 0.30.
- a MgO/RO ratio of less than 0.10 can affect the resistance at very high temperatures.
- a MgO/RO ratio of more than 0.50 can increase the liquidus.
- the total content of alkali metal oxides (R2O), in particular sodium hydroxide (Na2O) and potassium hydroxide (K2O), is preferably greater than 12%.
- the Na2O content is in a range from 5 to 20%, in particular from 6%, or even 7%, to 18%, or even 15%, or 12%.
- the K2O content is at most 15%, in particular from 1%, or even 2%, to 12%, or even 10%, 8%, 5%, or 4%.
- the mineral wool preferably does not comprise any other alkali metal oxide than Na2O and K2O. It may nevertheless contain small quantities of Li2O, sometimes present as impurities in certain raw materials, at contents of up to 0.5%, or even 0.2%, or even 0.1%.
- the RO/(RO+R2O) ratio is less than 0.60, in particular from 0.15, or even 0.20 or 0.30 to 0.59, or even 0.58.
- An RO/(RO+R2O) ratio greater than 0.60 can affect the fiberability of the composition.
- the ratio (Na2O+MgO)/CaO is greater than 0.80 and less than 1.4, or even less than 1.3.
- a ratio (Na2O+MgO)/CaO less than 0.80 can affect the properties of resistance to very high temperatures.
- a ratio (Na2O+MgO)/CaO greater than 1.4 can affect the fiberability of the composition.
- the iron oxide (Fe2O3) content is in the range from 2 to 15%, in particular from 3%, or even 4%, or 4.5% to 12%, or even 10%, or 8%. If the (total) iron oxide content is expressed in the form Fe20s, this does not mean that this iron oxide is necessarily and exclusively present in the glass in the ferric form. Glass generally contains iron oxide in both its ferric (Fe2O3) and ferrous (FeO) forms, and it is purely by convention that the total iron oxide content is designated by Fe2O3. Iron oxide has a positive effect on the high temperature resistance of mineral wool.
- the ratio (MgO+Al2Os)/Fe2O3 is less than 5.0, in particular 2.0, or even 3.0 to 5.0.
- a ratio greater than 5.0 can promote the formation of spinels at fiberizing temperatures and/or affect the resistance at very high temperatures.
- the boron oxide (B2O3) content is at most 2%, in particular 0.1%, or even 0.5%, to 1.5%, or even 1%.
- the presence of boron may be advantageous for improving the biosolubility of the fibers and/or improving their insulating properties.
- the composition comprises less than 1% B2O3.
- the mineral fiber composition according to the invention may also contain P2O5, in particular at contents of up to 3%, or even up to 1.2%, to increase the biosolubility at neutral pH. However, it is preferably essentially free of P2O5, which may nevertheless be present as impurities of up to 0.5%.
- the composition according to the invention may also comprise other elements present in particular as unavoidable impurities. It may comprise titanium oxide (TiC) and zirconia (ZrC) each at contents within a range of up to 3%, in particular from 0.1 at 2.0%, or even 1.0%.
- TiC titanium oxide
- ZrC zirconia
- the composition is preferably essentially free of halogens, especially fluorine. It typically comprises less than 1%, or even less than 0.5%, of halogens, especially fluorine.
- the mineral fibers according to the invention have a chemical composition comprising the following constituents, in weight percentages:
- AI2O3 20 to 23%, preferably 21 to 23%
- B 2 O 3 0 to 1% a MgO/RO mass ratio greater than 0.10 and less than 0.50, preferably less than 0.40, or even less than 0.30, a RO/(RO+R 2 O) mass ratio less than 0.60, a (Na 2 O+MgO)/CaO mass ratio greater than 0.8 and less than 1.4, and a (MgO+Al 2 O3)/Fe 2 O3 mass ratio less than 5.0.
- the invention also relates to a process for obtaining mineral fibers according to the invention, comprising a step of melting a vitrifiable mixture having substantially the same chemical composition as that of said mineral fibers; then a fiberizing step, in particular by internal centrifugation.
- the melting step makes it possible to obtain a bath of molten material from a vitrifiable mixture.
- the vitrifiable mixture comprises various natural and/or artificial raw materials, for example silica sand, phonolite, dolomite, sodium carbonate, etc.
- the melting step can be carried out in various known ways, in particular by melting in a flame furnace or by electric melting.
- the flame furnace comprises at least one burner, aerial (the flames are arranged above the bath of molten material and heat it by radiation) or submerged (the flames are created directly within the bath of molten material).
- the or each burner can be supplied by various fuels such as natural gas or fuel oil.
- the vitrifiable mixture is melted by Joule effect, by means of electrodes immersed in the molten material bath, to the exclusion of any use of other heating means, such as flames.
- the vitrifiable mixture is normally distributed homogeneously over the surface of the molten material bath using a mechanical device, and thus constitutes a thermal shield limiting the temperature above the molten material bath, so that the presence of a superstructure is not always necessary.
- the electrodes can be suspended so as to immerse in the molten material bath from above, be installed in the floor, or even be installed in the side walls of the tank. The first two options are generally preferred for large tanks in order to distribute the heating of the molten material bath as well as possible.
- the electrodes are preferably made of molybdenum, or possibly even of tin oxide or graphite.
- the molybdenum electrode is preferably passed through the bottom via a water-cooled steel electrode holder.
- the melting step can also implement both flame melting and electric melting, for example by using a flame furnace also equipped with side wall electrodes used to accelerate the melting of the vitrifiable mixture.
- the fiberizing step is preferably carried out by internal centrifugation.
- the fibers obtained can be bonded together using a sizing composition sprayed on their surface, before being received and shaped to give various mineral wool products, such as rolls or panels.
- the mineral wool products thus bonded preferably comprise at most 15% by dry weight of binder relative to the total weight of the binder and the mineral fibers.
- the mineral wool may comprise a phosphorus additive, preferably sprayed at the same time as the sizing composition.
- the phosphorus additive may be a mineral additive, as described in application WO 01/68546 or a phosphated organic additive, for example an oligomer or polymer of the polyacid or phosphonic or phosphoric polyester type, as taught by application WO 2006/103375.
- the mineral wool compositions according to the invention however have the advantage of having intrinsically very good resistance properties at very high temperatures.
- the use of phosphorus additives makes it possible to further improve these performances. The use of such phosphorus compounds is however not necessary even for certain very demanding applications requiring protection against fire.
- the mineral wool does not comprise a phosphorus additive.
- the invention also relates to a thermal insulation product comprising mineral fibers according to the invention.
- a thermal insulation product comprising mineral fibers according to the invention.
- Such a product is in particular in the form of rolls or panels. It can be used for example in buildings, in industry or in means of transport, in particular rail or maritime. It is particularly suitable for applications in which it may be subjected to high temperatures, either continuously (insulation of domestic or industrial ovens or stoves, fluid transport pipes) or accidentally, in a role of protection against fire (fire doors, insulation of ships, tunnels or offshore platforms - ••).
- the product according to the invention can be used to thermally insulate any type of building, tertiary or residential (collective or individual). It can for example be used in external insulation systems, for the insulation of timber-framed houses, in sandwich panels, in ventilation ducts, etc.
- the invention also relates to the use of the mineral wool described above in fire-resistant construction systems.
- Fire-resistant construction systems are systems, generally comprising assemblies of materials, in particular based on mineral wool and metal plates, capable of delaying effectively spread heat as well as provide protection against flames and hot gases and maintain mechanical resistance during a fire.
- Standardized tests define the degree of fire resistance, expressed in particular as the time required for a given temperature to be reached on the opposite side of the construction system subjected to a heat flow, released for example by the flame of a burner or an electric oven.
- a construction system is considered to have satisfactory fire resistance capacity, in particular if it is capable of meeting the requirements of one of the following tests:
- DIN 4102 - Part 5 is considered for full-scale tests to determine the fire resistance class, and/or DIN 4102 - Part 8 for tests on samples with a small test bench.
- compositions are considered to have satisfactory fiberizing properties (OK), in particular for internal centrifugal fiberizing processes, if they have a fiberizing temperature (Tnb-Tiogs) of less than 1220°C, a liquidus temperature Tü q of less than 1180°C and a fiberizing range Tfib-Tiiq of greater than 35°C. Conversely, the fiberizing properties are not satisfactory (NOK) if one of these conditions is not met.
- the slump is determined by thermomechanical analysis.
- the glasses obtained are reduced to powder with a particle size of less than 40 ⁇ m.
- Each glass powder is compacted in the form of cylindrical pellets 5 mm in diameter and approximately 1 cm high and with a density equal to 64% of that of the glass.
- the slump expressed as a percentage, corresponds to the variation in the height of a glass powder pellet subjected to a ramp of 10 K/min from room temperature to 1100°C relative to the initial height of the pellet.
- the height of the sample is measured using a probe placed at the top of the cylinder. Repeatability tests make it possible to define a standard deviation of less than 1%.
- a slump of less than 12% is considered satisfactory (OK) to obtain resistance to the desired cellulosic fire curve.
- NOK satisfactory resistance
- the presence of spinels is measured by microscopic analysis.
- the glasses obtained are reduced to powder with a particle size between 815 pm and 2 mm.
- the powders are annealed at temperatures between Tlog3+50 °C and Tlog3-50 °C.
- the presence of spinel crystals is characterized by preparation of a thin section of the annealed glass and observation by optical or even electronic microscopy.
- Example 1 exhibits low sag of less than 12% which is maintained up to 1100°C, indicating good resistance to very high temperatures.
- This composition also exhibits a Ti og 3 temperature of less than 1220°C, a Tü q temperature of less than 1180°C and a fiberizing range of greater than 35°C, which allows fiberizing by internal centrifugation without risk of devitrification. It also exhibits no formation of spinels at fiberizing temperatures which are likely to affect the efficiency of the fiberizing and/or the service life of the fiberizing members.
- the compositions of Comparative Examples C1 to C6 do not make it possible to satisfy all of these criteria.
- compositions C1, C2, C3, C6 and C7 do not exhibit sufficient resistance to very high temperatures.
- composition C6 shows a collapse of the sag from 1000°C to reach more than 20% at 1100°C.
- Compositions C1 and C4 do not show satisfactory fiberization properties, in particular due to a Tü q too high to be able to be fiberized by internal centrifugation.
- the formation of spinels is observed at fiberizing temperatures for compositions C5 and C7.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2024224928A AU2024224928A1 (en) | 2023-02-20 | 2024-02-20 | Mineral wool |
| KR1020257030328A KR20250151640A (ko) | 2023-02-20 | 2024-02-20 | 미네랄 울 |
| CN202480013398.4A CN120712240A (zh) | 2023-02-20 | 2024-02-20 | 矿棉 |
| CONC2025/0011507A CO2025011507A2 (es) | 2023-02-20 | 2025-08-27 | Lana mineral |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2301553 | 2023-02-20 | ||
| FR2301553 | 2023-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024175601A1 true WO2024175601A1 (fr) | 2024-08-29 |
Family
ID=86469386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/054304 Ceased WO2024175601A1 (fr) | 2023-02-20 | 2024-02-20 | Laine minerale |
Country Status (5)
| Country | Link |
|---|---|
| KR (1) | KR20250151640A (fr) |
| CN (1) | CN120712240A (fr) |
| AU (1) | AU2024224928A1 (fr) |
| CO (1) | CO2025011507A2 (fr) |
| WO (1) | WO2024175601A1 (fr) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0189354A1 (fr) | 1985-01-25 | 1986-07-30 | Saint-Gobain Isover | Perfectionnements à la fabrication de fibres minerales |
| EP0439385A1 (fr) | 1990-01-16 | 1991-07-31 | Isover Saint-Gobain | Procédé et dispositif de fibrage de laine minérale par centrifugation libre |
| EP0465310A1 (fr) | 1990-07-02 | 1992-01-08 | Isover Saint-Gobain | Procédé de formation de fibres minérales |
| EP0519797A1 (fr) | 1991-06-20 | 1992-12-23 | Isover Saint-Gobain | Procédé et dispositif de formation de fibres |
| WO1993002977A1 (fr) | 1991-08-02 | 1993-02-18 | Isover Saint-Gobain | Procede et appareil de fabrication de laine minerale et laine minerale ainsi fabriquee |
| WO2001068546A1 (fr) | 2000-03-17 | 2001-09-20 | Saint-Gobain Isover | Composition de laine minerale |
| WO2005033032A1 (fr) | 2003-10-06 | 2005-04-14 | Saint-Gobain Isover | Composition de laine minerale |
| WO2006103375A2 (fr) | 2005-04-01 | 2006-10-05 | Saint-Gobain Isover | Laine minerale, produit isolant et procede de fabrication |
| WO2020065191A1 (fr) | 2018-09-26 | 2020-04-02 | Saint-Gobain Isover | Laine minerale |
-
2024
- 2024-02-20 KR KR1020257030328A patent/KR20250151640A/ko active Pending
- 2024-02-20 CN CN202480013398.4A patent/CN120712240A/zh active Pending
- 2024-02-20 WO PCT/EP2024/054304 patent/WO2024175601A1/fr not_active Ceased
- 2024-02-20 AU AU2024224928A patent/AU2024224928A1/en active Pending
-
2025
- 2025-08-27 CO CONC2025/0011507A patent/CO2025011507A2/es unknown
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0189354A1 (fr) | 1985-01-25 | 1986-07-30 | Saint-Gobain Isover | Perfectionnements à la fabrication de fibres minerales |
| EP0439385A1 (fr) | 1990-01-16 | 1991-07-31 | Isover Saint-Gobain | Procédé et dispositif de fibrage de laine minérale par centrifugation libre |
| EP0465310A1 (fr) | 1990-07-02 | 1992-01-08 | Isover Saint-Gobain | Procédé de formation de fibres minérales |
| EP0519797A1 (fr) | 1991-06-20 | 1992-12-23 | Isover Saint-Gobain | Procédé et dispositif de formation de fibres |
| WO1993002977A1 (fr) | 1991-08-02 | 1993-02-18 | Isover Saint-Gobain | Procede et appareil de fabrication de laine minerale et laine minerale ainsi fabriquee |
| WO2001068546A1 (fr) | 2000-03-17 | 2001-09-20 | Saint-Gobain Isover | Composition de laine minerale |
| WO2005033032A1 (fr) | 2003-10-06 | 2005-04-14 | Saint-Gobain Isover | Composition de laine minerale |
| WO2006103375A2 (fr) | 2005-04-01 | 2006-10-05 | Saint-Gobain Isover | Laine minerale, produit isolant et procede de fabrication |
| FR2883866A1 (fr) * | 2005-04-01 | 2006-10-06 | Saint Gobain Isover Sa | Laine minerale, produit isolant et procede de fabrication |
| WO2020065191A1 (fr) | 2018-09-26 | 2020-04-02 | Saint-Gobain Isover | Laine minerale |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2024224928A1 (en) | 2025-08-14 |
| KR20250151640A (ko) | 2025-10-21 |
| CN120712240A (zh) | 2025-09-26 |
| CO2025011507A2 (es) | 2025-09-08 |
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