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EP0000402B1 - Procédé de fabrication de plaques de construction isolantes - Google Patents

Procédé de fabrication de plaques de construction isolantes Download PDF

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Publication number
EP0000402B1
EP0000402B1 EP78100410A EP78100410A EP0000402B1 EP 0000402 B1 EP0000402 B1 EP 0000402B1 EP 78100410 A EP78100410 A EP 78100410A EP 78100410 A EP78100410 A EP 78100410A EP 0000402 B1 EP0000402 B1 EP 0000402B1
Authority
EP
European Patent Office
Prior art keywords
board
binder
mineral fiber
clay
anyone
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.)
Expired
Application number
EP78100410A
Other languages
German (de)
English (en)
Other versions
EP0000402A1 (fr
Inventor
Josef Dipl.-Ing. Schirmeisen
Heinz Dipl.-Chemiker Dr. Schweikert
Max Thebesius
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gruenzweig und Hartmann und Glasfaser AG
Saint Gobain Industries SA
Original Assignee
Gruenzweig und Hartmann und Glasfaser AG
Saint Gobain Industries SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gruenzweig und Hartmann und Glasfaser AG, Saint Gobain Industries SA filed Critical Gruenzweig und Hartmann und Glasfaser AG
Publication of EP0000402A1 publication Critical patent/EP0000402A1/fr
Application granted granted Critical
Publication of EP0000402B1 publication Critical patent/EP0000402B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C04B41/5037—Clay, Kaolin
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/65—Coating or impregnation with inorganic materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/65—Coating or impregnation with inorganic materials
    • C04B41/68—Silicic acid; Silicates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/70—Coating or impregnation for obtaining at least two superposed coatings having different compositions
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials

Definitions

  • the invention relates to a method for producing insulating building boards and is based on a method in which a mineral fiber board prebound with an organic binder on a plastic basis is impregnated with an aqueous slurry of an inorganic binder and then warm-dried.
  • Insulating plate should generally be understood to mean a heat and / or sound insulating plate, which can also be used as a fire protection plate if necessary.
  • Insulating building boards with the required high mechanical strength values can only be produced in the form of asbestos-silicate boards, whereby asbestos fibers, hydraulic cements or calcium hydroxide with the addition of quartz powder or other silicate substances are first mixed with water to form a mash. This slurry is dewatered in it and the filter cake thus obtained is pressed and hydrothermally hardened.
  • the bending strengths of such plates are between 4.9 and 9.8 N / mm z at plate densities of 0.65 to 0.8 g / cm 3 .
  • the compressive strengths are in the range from 2.9 to 6.9 N / mm2.
  • these plates also contain a considerable proportion of water-soluble, in some cases strongly alkaline, substances, so that the effect of moisture can lead to salt efflorescence on the surface of the plates.
  • the prior art also includes a method for producing an insulating plate for wall and ceiling constructions with flame-retardant properties.
  • a glass fiber layer pre-bonded with a plastic binder with a density of 0.11 g / cm 3 is first impregnated with an inorganic binder slurry consisting of hydraulic cements or gypsum, but preferably of magnesium oxide chloride cement (Sorel cement).
  • Sorel cement magnesium oxide chloride cement
  • the moist plate is dried at 232 ° C.
  • the product obtained has a density of 0.28 to 0.3 g / cm 3.
  • the density can be increased up to a value of 0.5 g / cm 3 .
  • this plate also does not meet the requirements that an asbestos silicate plate already achieves in terms of compressive and flexural strength.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims solves the problem of specifying a method by which it is possible to exceed the compressive and flexural strength values of asbestos silicate boards without the negative properties of the asbestos fiber boards bound with cement to have to take.
  • a mineral fiber board bound with organic binders is deliberately used, the density of which is already selected to be as high as possible.
  • this plate already has good dimensional stability during the impregnation and drying process.
  • such a high degree of compaction of the starting fiberboard due to the favorable ratio of fiber content to binding clay, has a particularly advantageous effect on achieving the required strength properties of the end product, which not only has excellent compressive and flexural strength, but also an outstanding splitting strength.
  • Another advantage results from the fact that the elastic modulus of this product is influenced favorably.
  • These clays preferably consist mainly of the following minerals:
  • the chemical composition of the clays fluctuates in the range of the following parts by weight:
  • the temperature treatment according to the invention in the range between 400 ° C. and the transformation temperature of the mineral fibers used for the production of the prebound mineral fiber board, a complete water resistance of the insulating building board is achieved.
  • the flammable organic constituents which came in the form of resins, lubricating oils, wetting agents and dispersing agents during the production of the mineral fiber starting plate or impregnation process with the clay suspension, are largely driven out again by the temperature treatment.
  • the end product can not only no longer ignite, but also no longer glow and can therefore be regarded as an absolutely non-flammable material according to DIN 4102.
  • the starting material for the mineral fiber board is one with a maximum fiber diameter of 6 ⁇ m. If coarser fibers with a diameter of over 6 pm are used, the clay suspension can be introduced more easily into the fiberboard, since the fiber cavities in the plate are relatively large and therefore no filter effect is to be feared even when using coarse-grained clays when impregnating such a plate. the final strengths achieved, in particular the splitting strength of a mineral fiber board produced in this way are much less than a comparable board, the starting material of which consists of finer fibers.
  • this unexpectedly high increase in strength can only be determined when temperatures below the transformation point of the mineral fibers used to produce the starting plates are used.
  • this transition temperature was 620 to 640 ° C. If this temperature was exceeded, there was a significant deterioration in the panel strength, particularly with regard to flexural strength and elasticity behavior.
  • This reduction in the strength properties is due to the fact that due to oxidation of the mineral fibers, in which a conversion of the FeO present in the fibers into Fe z 0 3 takes place, the fibers become largely embrittled and thus the actual function of the fibers as a scaffold of the building board to give a high bending and tensile strength and elasticity is lost.
  • the conversion of iron oxide under the influence of atmospheric oxygen is strongly temperature-dependent and is particularly intensive when the transformation point is reached, at which the fiber softens.
  • This undesirable oxidation reaction in the treatment of mineral fiber plates filled with binding clay in the temperature range mentioned can be practically completely eliminated in a further development of the invention if the temperature control and dwell time are further adjusted so that on the one hand the crystal water is almost completely eliminated from the binding clay and on the other hand the carbon, which is formed as a residue from the combustion of the organic components during the temperature treatment between 400 and 650 ° C, has not yet completely burned out.
  • This phenomenon can be improved by the fact that the temperature treatment in this temperature range takes place in a reducing atmosphere, i.e. by setting the flame appropriately for gas or heating oil-operated stoves or when installing a vessel with powdered graphite or graphite rods in the furnace chamber when using electrically heated stoves.
  • the impregnated plate can be subjected locally to another impregnation before drying, this additional impregnation advantageously being carried out at the edges of the plate.
  • the mineral fibers used for the production of the pre-bound mineral fiber board are reinforced, which is used for picking up nailing, milling grooves, working out springs or tines and the like, can serve. In this way it is possible, in particular, to carry out shapes at the edges which enable the direct connection of one plate to the subsequent plate and a complete sealing of any gaps and, moreover, increase the strength of such a plate composite.
  • the same can be split into two plates before soaking and thereby has the advantage that the impregnation process, provided the gap side comes to the top when soaking, is facilitated.
  • drying can be carried out by microwave radiation. This avoids a drying gradient from the outside in, which inevitably occurs, for example, when drying with warm air. Rather, drying is achieved from the inside out and thus a uniform structure of the finished plate.
  • binder clay with a grain size distribution of 80% below 2 ⁇ m is used.
  • the moist fibrous web was then pressed in a plate machine between two perforated metal strips to a thickness of 25 mm to form a plate and at the same time dried and cured with hot air at 200 to 220 ° C.
  • the plate thus produced had a density of 0.2 g / cm 3 .
  • the resin content was 3.6% by weight of solid, based on the weight of the plate.
  • the plate strand thus produced was passed into a flooding device, where an aqueous suspension of binding clay was sucked into the mineral fiber plates from above with the aid of a vacuum applied to the underside of the plates, until the plate was completely saturated.
  • the impregnated plate was then passed on a conveyor belt into a drying oven and dried there with circulating air at 200 ° C. It was then heated for 10 minutes at 580 ° C. or 20 minutes at 480 ° C. in an oven heated with natural gas with a reducing flame.
  • the plate saturated with binding clay suspension was passed between two pressure rollers, the excess of the clay suspension being almost completely pressed out of the plate.
  • Table 1 shows a compilation of different process procedures and the achievable or achieved values, whereby a detailed description of this table is not necessary because of the detailed information of the process steps and the corresponding values.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Claims (10)

1. Procédé pour la fabrication de panneaux de construction isolants dans lequel un panneau en fibres minérales lié préalablement avec un liant organique à base de résine est imprégné d'une suspension aqueuse d'un liant inorganique et ensuite séché à chaud, caractérisé en ce que, partant d'un panneau en fibres minérales lié préalablement avec un liant de résine, organique et d'une densité d'au moins 0, 15, de préférence de 0,2 g/cm3, ce panneau en fibres minérales est trempé complètement dans une suspension aqueuse d'une argile aggloméranie dont la granulométrie à au moins 80%, de préférence à 90% se trouve au-dessous de 2 microns et qui libère son eau liée chimiquement dans un intervalle de température compris entre 400°C et 650°C, et après le séchage à des températures au-dessus de 105°C est cuit à des températures au-dessus de 400°C mais en-dessous de la température de transformation des fibres minérales utilisées pour la fabrication du panneau en fibres minérales préalablement lié.
2. Procédé selon la revendication 1, caractérisé en ce qu'en tant que matériau de départ pour le panneau de fibres minérales on utilise un tel matériau avec des diamètres maxima de fibres de 6 microns.
3. Procédé selon la revendicationsl ou 2, caractérisé en ce que l'opération de cuisson est effectuée en atmosphère réductrice.
4. Procédé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'argile agglomérante utilisée consiste essentiellement dans les minéraux suivants:
Figure imgb0008
5. Procédé selon la revendication 4, caractérisé en ce que la composition de l'argile . agglomérante se situe dans la gamme des pourcentages en poids suivante:
Figure imgb0009
6. Procédé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le panneau trempé est, avant le séchage, soumis localement à un tempage répété.
7. Procédé selon la revendication 6, caractérisé en ce que le trempage répété est effectué sur les bords du panneau.
8. Procédé selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'on part d'un panneau d'épaisseur double qui est fendu, après trempage, séchage et cuisson, en deux panneaux.
9. Procédé suivant l'une ou plusieurs des revendications 1 à 7 caractérisé en ce que l'on part d'un panneau d'épaisseur double que l'on fend, avant trempage, en deux panneaux.
10. Procédé suivant l'une ou plusieurs des revendications précédentes, caractérisé en ce que le séchage est effectué par rayonnement 6 micro-ondes.
EP78100410A 1977-07-18 1978-07-17 Procédé de fabrication de plaques de construction isolantes Expired EP0000402B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2732387A DE2732387C2 (de) 1977-07-18 1977-07-18 Verfahren zur Herstellung von Isolierbauplatten
DE2732387 1977-07-18

Publications (2)

Publication Number Publication Date
EP0000402A1 EP0000402A1 (fr) 1979-01-24
EP0000402B1 true EP0000402B1 (fr) 1981-07-08

Family

ID=6014191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100410A Expired EP0000402B1 (fr) 1977-07-18 1978-07-17 Procédé de fabrication de plaques de construction isolantes

Country Status (2)

Country Link
EP (1) EP0000402B1 (fr)
DE (2) DE2732387C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT369764B (de) * 1980-10-27 1983-01-25 Oesterr Hiag Werke Ag Isolierplatte und verfahren zu deren herstellung
DE3248661A1 (de) * 1982-12-30 1984-07-05 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen Hitzebestaendig beschichtetes bauteil
DE4204583C2 (de) * 1992-02-15 1994-10-27 Modern Ecological Prod Verbundwerkstoff, Verfahren zu seiner Herstellung und seine Verwendung
DE4228355C1 (de) * 1992-08-26 1994-02-24 Didier Werke Ag Feuerfeste Leichtformkörper
GB2383793B (en) 2002-01-04 2003-11-19 Morgan Crucible Co Saline soluble inorganic fibres
US7875566B2 (en) 2004-11-01 2011-01-25 The Morgan Crucible Company Plc Modification of alkaline earth silicate fibres
DE102008040986A1 (de) 2008-08-05 2010-02-11 Evonik Goldschmidt Gmbh Hydrophobierung von Bauelementen aus Mineralfasern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1252571B (de) * 1967-10-19 Stocksund Carl Georg Munters (Schweden) Verfahren zur Herstellung von Austauschkörpern für Feuchtigkeit und/oder Wärme
BE624215A (fr) *
US3286785A (en) * 1965-05-24 1966-11-22 Owens Corning Fiberglass Corp High temperature resistant acoustical board
DE2100922A1 (en) * 1971-01-11 1972-07-20 Panacon Corp., Cincinnati, Ohio (V-StA.) Asbestos board - for rolls conveying hot plate glass
ZA731537B (en) * 1972-03-10 1973-11-28 Foseco Int Refractory heat insulating materials

Also Published As

Publication number Publication date
DE2860819D1 (en) 1981-10-15
EP0000402A1 (fr) 1979-01-24
DE2732387C2 (de) 1979-07-12
DE2732387B1 (de) 1978-11-09

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