DE20114949U1 - Fire-resistant profile component - Google Patents

Description

K0873/VIII

bemofensterbau GmbH, Kärlicher Straße, 56575 Weißenthurm

"Fire-resistant profile component"

The invention relates to a fire-resistant profile component for the production of windows, doors, wall elements, facades and the like.

EP 0 717 165 B1 describes a fire-retardant profile component that is manufactured as a multi-chamber profile made of light metal, preferably aluminum, with an insulating bar that reduces heat flow. In this framework, the outer and inner shells each enclose a hollow chamber. These two hollow chambers are connected by means of an insulating bar and embedded bridge bars, so that a three-chamber profile is formed. Fire protection panels are inserted into these chambers and fixed by means of metal springs. In the event of a fire, the fire protection panels release crystal water, which cools the aluminum profile and prevents the aluminum profile facing the fire from melting. However, this design has the disadvantage that it is only suitable for fire resistance times of up to 30 minutes. Longer fire resistance times of 60, 90 or 120 minutes cannot be achieved with this.

EP 0 785 334 B1 also discloses a frame system that is also made from multi-chamber aluminum profiles. In this frame system, it is proposed that an aluminum core profile is formed that supports the fire-resistant glazing. Outer and inner shells are placed in front of this core profile, so that a three-chamber profile is formed here too. The supporting core profile or the two outer shells are connected to an insulating web that reduces the heat flow. The chamber of the core profile or the two hollow chambers of the outer shells are filled with a fire-resistant insulating compound, so that the outer shells protect the supporting core of the aluminum profile in the event of a fire.

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The invention is based on the object of creating a fire-resistant profile component for economic reasons, which consists of a thermally decoupled single-chamber aluminum composite profile, which is suitable for fire resistance times of 30, 60, 90 and 120 minutes while being simple and inexpensive to manufacture.

The invention proposes that the frame system has a load-bearing inner and outer support shell, which are connected in a force-fitting and form-fitting manner by means of an insulating web, which is made of polyamide or PVC, for example, so that a statically stable composite profile is formed for normal use, i.e. not in the event of a fire. This composite profile surrounds a single hollow chamber, which is filled with a fire-protection insulating compound. The profile can be filled by inserting prefabricated molded parts or by pouring in a mortar-like compound.

The fire protection insulation mass can, for example, consist of a matrix of glass fibre reinforced mineral materials.

The fire protection effect of the frame is created by the interaction of the individual components. In the event of a fire, the outer or inner aluminum support shell of the composite profile melts, depending on the location of the fire. The melting point of aluminum is 600-650 ^° C. In a fire test according to DIN 4102, this temperature is reached after around 10 minutes according to the ETK (standard temperature curve). After 30 minutes, the temperature in the furnace is 822 °C and after 90 minutes it is 986 °C. The insulating bars, which are made of a mechanically strong material with low thermal conductivity, prevent the heat from migrating to the aluminum support shell on the side facing away from the fire. In the event of a fire, this aluminum support shell, together with the fire protection insulation compound, forms the statically load-bearing cross-section. It is particularly advantageous here that the frame system consists of a single-chamber profile, since the insulating mass, thanks to the large hollow chamber, forms a stable block together with the aluminum supporting shell on the side facing away from the fire, which then takes on the static load-bearing function.

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In addition, it is advantageous here that the fire protection insulating compound has an insulating effect due to its composition, whereby this insulating compound advantageously releases crystalline bound water under the influence of heat, whereby the entire profile component according to the invention is cooled and thus the fire resistance time is positively influenced.

Another way to control the fire resistance times is by increasing or decreasing the depth of the insulating bars and thus the distance between the aluminum outer and inner shells.

Another option is to change the depth of the inner and outer shells. Since in the event of a fire it is impossible to predict from which side the fire will hit the profile component and the profile component must ensure the room is sealed with all anchors, fittings, glass and panel brackets, all of these parts are attached to the outer and inner supporting shells of the aluminum composite profile.

The particular economic advantage of the single-chamber composite profile according to the invention is that the open, U-shaped aluminum inner and outer support shells are cheaper to manufacture than aluminum hollow profiles, and that it is possible to process the single-chamber composite profiles into frames like normal thermally insulated aluminum profiles using metal corner brackets and to subsequently fill the fire protection insulation compound into the prefabricated frame through the large hollow chamber.

The particular fire protection advantage of the single-chamber composite profile according to the invention is that the large hollow chamber allows a large amount of fire protection insulation to be filled into the single-chamber composite profile, which forms a stable insulating block in which the corner brackets and connecting elements are embedded. This is not possible to this extent with multi-chamber composite profiles.

It is also particularly advantageous if the fire-resistant component according to the invention is filled with a fire protection insulating compound which contains magnesium oxychloride cement or consists entirely of magnesium oxychloride cement.

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Magnesium oxychloride cement goes back to a patent that was registered in 1865 with the Imperial and Royal Privileges Archives, and is named after its inventor as Sorel cement or magnesia cement. Mixtures of magnesium oxide (burnt magnesia) and concentrated magnesium chloride solution harden like stone, forming basic chlorides whose structure is derived from that of magnesium hydroxide, and were used, for example, with the addition of neutral fillers and colors to produce artificial stones and seamless floors (cf. DIN 272 - magnesia screeds) as well as artificial ivory (billiard balls) (see Holleman-Wiberg, Textbook of Inorganic Chemistry, 81st-90th edition, pp. 685-686).

Because Sorel cement has been known for a long time, there is a large amount of literature on the subject, although some of it is controversial. It is known that magnesium oxychloride cement has heat and sound insulating properties. The cement has a high density, which has led to efforts to create pores in it for the purpose of lightweight construction. In addition, depending on its composition, the cement is only partially water-resistant, so that despite its fire-retardant properties, it has only been used to a limited extent, i.e. as a fire-retardant impregnating agent, for example, and not as a solid building element. The high corrosiveness of the material also played a role. For example, magnesia screeds (also called magnesite screeds) must not come into contact with steel parts of buildings. Beams, frames and pipes must therefore be covered with bitumen paper or another barrier material before screed is laid.

Since the profile component according to the invention is a composite body that can also fulfill a load-bearing function, a high density of the cement is advantageous. If required, however, a reduction in density can also be advantageously achieved for profile components according to the invention that are used in a non-load-bearing capacity. The corrosiveness can be counteracted by, for example, applying a protective coating to the inner walls of the hollow chamber or by making the chamber out of aluminum. A possibly lower water resistance than that of conventionally used material is of only insignificant importance due to the existing coating of the mass.

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In the event of a fire, the mass does not initially come into contact with the fire because it is surrounded by the hollow chamber wall, so that the fire resistance does not initially take effect immediately - as is the case with components with a coating or impregnation with magnesium oxychloride cement - but only after the cladding has possibly melted away. Nevertheless, it has been shown that the fire-resistant profile component according to the invention surprisingly has an increased fire resistance. This can be explained by the fact that the following reactions, among others, can take place during the production of a magnesium oxychloride cement:

3 MgO + MgCl ₂ + 11 H ₂ O -> MgCl ₂ * 3 Mg(OH) ₂ * 8 H ₂ O
5 MgO + MgCl ₂ + 13 H ₂ O -> MgCl ₂ * 5 Mg(OH) ₂ * 8 H ₂ O
5 MgO + MgCl ₂ + 17 H ₂ O -> MgCl ₂ * 5 Mg(OH) ₂ * 12 H ₂ O.

This shows that in the hardened cement, a high level of water of crystallization is bound in a matrix of magnesium chloride and magnesium hydroxide, so that due to the presence of hydroxides and oxide hydrates, some authors completely reject the term magnesium oxychloride cement, while other authors defend this term. It is difficult to determine the exact structure and this is also determined in different ways by the composition or proportions of the raw materials used in production. In any case, however, as with - and even more than with - the well-known filling compound made of gypsum and alum mentioned at the beginning, water is obviously released or evaporated when exposed to indirect heat (heat conduction through the wall of the casing), which is associated with an endothermic reaction or with the absorption of a large amount of latent heat and has a cooling effect on the casing. The high thermal conductivity of an aluminum material has a synergistic effect here.

With regard to an optimized property profile, it has proven to be particularly advantageous if the magnesium oxychloride cement has a composition with a molar ratio MgCl ₂ / Mg(OH) ₂ / H ₂ O of 1 : (2.5 to 5): (8 to 12).

The filling mass of the magnesium oxychloride cement can also be produced with the addition of magnesium sulfate, whereby it can consist of a matrix in which Mg(OH) ₂ -, MgCI ₂ -, MgSO ₄ -, Mg _x OCI-, Mg _y 0S0 ₄ - and Mg _z CISO ₄ -molecules or -

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ions are contained, which can have a beneficial effect on increased crystal water binding and on the water resistance of the cement. (The indices x, y, &zgr; can assume whole or non-whole number values.) It has proven particularly advantageous if the magnesium oxychloride-magnesium oxysulfate cement formed by admixing magnesium sulfate has a composition with a molar ratio MgCb / MgSÜ4 of 1 : (0.02 to 1.9).

Further improvements in the properties of the fire-resistant profile component according to the invention can also be achieved by the fire protection insulating compound containing water glass, in particular sodium water glass, and/or silica, in particular in gel form, the latter being able to be produced in a particularly advantageous manner by precipitation by means of metal salt and/or acid from water glass initially contained in the filling compound (in aqueous solution).

Further advantageous embodiments emerge from the subclaims.

Embodiments of the invention are illustrated in the drawings and are described below. They show:

Figure 1 shows a section through a fire-resistant profile component with fire-resistant fixed glazing,

Figure 2 shows a section through a fire-resistant component for forming a single-leaf door in the area of the door-lock side,

Figure 2a shows a section through the door rebate area according to Figure 2,

Figure 3 shows a section through a fire-resistant component in the area of the door centre panel of a double-leaf door,

Figure 4 shows a section through a fire-resistant component in the structure corresponding to Figure 2, but designed as an openable window in an external façade,

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Figure 5 shows a section through an alternative glass holder.

Figure 6 is a view of a frame formed with the profile components according to the invention.

In the various figures of the drawings, identical or functionally corresponding parts are always provided with the same reference symbols.

Figure 1 shows an example of a cross-section through a fixed glazing made of fire-resistant profile components 1, where I designates the inside and A the outside. The fixed glazing consists of sections of the profile components 1 and a fire-resistant glazing 2 joined together to form a frame R (see Fig. 6). The profile component 1 consists of an essentially U-shaped inner support shell 3 and an also essentially U-shaped outer support shell 4, which are made, for example, from extruded aluminum. The inner and outer support shells 3, 4 face each other with their side legs 5 and point in the direction of the inner side I or outer side A. In the side legs 5 of the inner and outer support shells running transversely to the window plane X-X, undercut grooves 300, 301, 400, 401 are provided in the area of the free ends of the side legs 5, which receive thermally isolating insulating bars 6 by rolling them in a force-fitting and form-fitting manner. The insulating bars 6 have the property that they are poor heat conductors and melt under the influence of heat. The profile component 1, which forms a single-chamber aluminum composite profile 35 with the inner support shell 3 and outer support shell 4 as well as the insulating bars 6, encloses a single hollow chamber H which is filled with a fire protection insulating compound 7. The fire protection insulating compound 7 is connected to the inner support shell 3 and the outer support shell 4 in a form-fitting or form-fitting and force-fitting manner. The insulating webs 6 and the side legs 5 of the inner and outer support shell 3, 4 can be designed to different depths transverse to the X-X axis; this allows the fire resistance duration to be controlled.

The fire protection insulating compound 7 consists of a material which, if one of the supporting shells 3 or 4 melts, protects the opposite supporting shell 3 or 4 from exceeding the temperatures specified in the standards. This is achieved by the insulating compound 7 being placed as an insulating block in front of the

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inner or outer support shell 3 or 4 facing away from the fire and the fire protection insulating compound 7 releases crystalline water under the influence of heat, so that the entire support profile 3 or 4 is cooled together with the fire protection insulating compound 7. In addition, a metallic wire mesh 8 can be inserted into the fire protection insulating compound 7 as a reinforcement to improve the load-bearing capacity.

The glazing 2 made of fire-resistant glass is held in place in the normal case (not in the event of a fire) in a known manner in that the profile component 1 formed has an approximately L-shaped cross section with a glass abutment 9 parallel to the X-X axis, in which a groove 405 is formed to accommodate the outer glass seal 10. On the inner side I of the profile component 1, the fire-resistant glass 2 is held by a glass strip 11, which is inserted into a groove provided in a side leg 5 of the inner support shell 3 and fixed by an inner glass seal 12. In the event of a fire, however, the fire-resistant glass 2 is held by metal moldings 13, which are preferably made of stainless steel. Since it is not possible to determine in advance whether the fire will hit the inner or outer support shell 3 or 4, the metal molding 13 must be attached to the inner support shell 3 and the outer support shell 4 using screws (the screws are not shown here). The metal molded parts 13 can have a width of 2 to 5 cm. The distance between the molded parts can be between 20 and 100 cm. The higher the fire resistance period, the smaller the distance. The thickness of the molded part is between 0.5 and 2 mm.

In order to prevent the passage of hot fire gases between the front side of the fire protection glass 2 and the inner support shell 3 as well as the outer support shell 4, a seal 14 which foams under the influence of heat is inserted into the glass rebate.

The previously described basic design features of a fire-retardant or fire-resistant profile component 1 according to the invention for forming frames are common to all profile components according to the invention shown in Figures 1 to 6, with identical parts being provided with the same reference numbers. However, the individual profile components according to the invention in Figures 1 to 5 have different properties due to their additional functions as fixed glazing frames.

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frame profile, door frame profile, door sash frame profile, window frame profile, window sash frame profile or, due to special requirements, in the gap area between the door frame profile and the door sash frame profile or between two door sash frame profiles as well as the window frame profile and the window sash frame profile, special designs.

In Figure 2, a frame 15 is shown together with a casement 16 on the lock side of a single-leaf door, between which a circumferential rebate chamber F is formed. The door lock 17 in the casement 16 is attached to the inner and outer support shell 3, 4 with a connecting bracket 18 by means of screws. The strike plate 19 is also attached to the frame 15 with a connecting bracket 18 to the inner and outer support shell 3, 4. The anchor part 20 is attached to the frame 15 in the same way to the inner and outer support shell 3, 4 by means of screws.

Basically, according to the invention, all fittings required for locking the door, as well as all fastening and anchor parts, are always attached to the inner and outer support shells 3 and 4 in order to ensure the closure and the statically perfect fastening of the profile component from which the frame 15 and sash frame 16 are made, regardless of the fire side.

Figure 2a again shows the rebate area between the sash frame 16 and the cover frame 15 with the rebate chamber F. Here the section does not run through the lock area of the door, but above or below the door lock 17. Grooves 303, 304, 403, 404 are formed in the side legs 5 of the inner and outer support shells 3 and 4 of the cover frame 15 and the sash frame 16, which advantageously accommodate a seal 14 that foams up under the influence of heat in order to prevent the passage of hot fire gases. In addition, a stop leg 21 is formed on the cover frame 15 on the inner support shell 3 and on the sash frame 16 on the outer support shell 4, each parallel to the X-X axis. The stop leg 21 has a molded-in groove 21a for receiving a stop seal 22, which ensures that the door is windproof.

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Figure 3 shows the area of a central mullion of a double-leaf door with two posts of the casement frame 16 and 23 lying next to one another. The casement frame 16 with the door lock 17 corresponds to the design according to Figure 2, the post of the casement frame or mullion 23 contains a guide tube 24 made of plastic or metal in the middle of the fire protection insulating compound 7 for receiving a locking rod 25. The locking rod 25 serves in conjunction with the deadbolt lock 26 to lock the casement frame 23. The guide tube 24 is advantageously located in the middle of the fire protection insulating compound 7 and thus approximately in the neutral bending zone, so that in the event of severe deflection of the casement frame 23, which occurs in the event of a fire, the fire protection insulating compound 7 is not additionally loaded with stresses that could lead to the block of fire protection insulating compound 7 bursting. Analogously, the guide tube 24 with the locking bar 25 can also be used in the sash frame 16 for additional locking, e.g. of a door leaf.

Figure 4 shows a framework which corresponds in structure to Figure 2. However, the profile design is advantageously designed in such a way that the framework can be used as an openable window of fire protection class F30, F60 and F90 in an external facade. Since window constructions in outdoor areas have to meet high requirements in terms of wind and rain tightness, the profile design is advantageously designed in such a way that the rebate space between the window frame 27 and the window sash frame 28 is enlarged in the area of the respective external support shell 4, so that a central web seal 29 can be clamped into a receiving groove 29a in the side leg of the external support shell 4 of the window frame 27, which rests with its upper lip against a stop edge of the external support shell 4 of the window sash frame 28 and thus ensures wind and rain tightness. If water enters the drainage chamber 31, the water is led back out through the drainage hole 32. The drainage hole 32 is covered in a known manner with a rain cap 30. The fitting installation, the glass holder and the anchoring are carried out as described in Figure 2.

Figure 5 shows an alternative mounting for the fire protection glass 2. Here, the glass edge of the fire protection glass 2 is additionally secured by a

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continuous metal retaining strip 33. The metal retaining strip has a U-shaped cross-section with two side legs 33a and a base leg 33b connecting them. The side legs 33a are designed with a continuous hollow chamber, e.g. made from corresponding steel tubes. The side legs 33a are attached to the base leg 33b by means of screws (not shown here). The base leg 33b is approx. 2 to 5 cm wide and is attached at a distance of approx. 20 to 100 cm. The thickness of the base leg 33b is approx. 2 to 5 mm. The distance and the number of base legs 33b depend on the fire resistance period. The base legs 33b are each attached to the side legs 5 of the aluminum inner and outer support shells 3, 4 by screws. According to the invention, this glass holder ensures that, regardless of the direction of the fire, the additional glass holder is always attached to a support shell 3 or 4 facing away from the fire.

Figure 6 shows a schematic of the manufacture of a frame R, such as can be used, for example, to form the window frames and/or sash frames used in the figures explained above for forming windows, doors, wall elements, facades and the like. For this purpose, profile components with the structure explained above are made of essentially U-shaped profile parts made of extruded aluminum, each of which forms an inner support shell 3 and an outer support shell 4 and are prefabricated at their free leg ends by means of thermally isolating insulating webs 6 to form a composite profile 35 surrounding a single hollow chamber H and cut to length into individual frame sections, which are identified in Figure 6 with reference numbers R1, R2, R3 and R4. Then these frame sections R1 to R4, which may be mitred, are joined together to form the frames R shown in Figure 6, whereby corner connectors in known embodiments may be used in the corner areas between the individual sections R1 to R4. Now at least one, but preferably two, bores, designated by the reference numbers B, E in the frame section R4, are made in the frame R thus formed, which extend into the hollow chamber H surrounded by the composite profile 35, see Figure 1. It is now possible to fill a liquid or plastic fire protection insulating compound 7 into the hollow chamber H through the bore B according to arrow P1, whereby the air contained in the hollow chamber H is evacuated via the second

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Hole E can escape according to arrow P2. When the hollow chamber H is completely filled with the fire protection insulating compound 7, the holes B, E are closed by means of suitable closure elements and the fire protection insulating compound 7 hardens within the frame R. Alternatively, as already mentioned, it is possible for the fire protection insulating compound 7 to be introduced, at least partially, as one or more molded parts adapted to the cross-section of the hollow chamber H, which is illustrated in the drawing by means of the reference number 36.

In the event that the frame is assembled from the frame sections R1 to R4 in such a way that the hollow chamber H surrounded by the composite profile 35 in the respective frame sections R1 to R4 is guided all the way around and continuously through the entire frame R, a single drilling of a bore B or two bores B, E in the frame R is sufficient to be able to fill the entire circumferential hollow chamber H with fire protection insulating compound 7.

However, if, which is preferred for reasons of stability, corner connectors are used in the transition areas between adjacent frame sections R1, R2, R3, R4, a hole B is made for each frame section R1 to R4 to fill in the fire protection insulating compound 7 and a hole E is made for the air contained therein to escape, and thus each frame section R1 to R4 of the frame R is filled separately with the fire protection insulating compound 7.

A significant advantage of the method described above is that the profile sections are cut to length before being filled with the fire protection insulation compound 7. Since in this case only aluminum (the outer and inner support shell) and plastic (the insulating bars) have to be cut through, this can be done on conventional sawing devices without great effort and wear. Filling with fire protection insulation compound 7 already completed at this point, however, causes very high sawing wear due to the additional fire protection insulation compound 7 that has to be cut through, which is avoided according to the invention.

As already explained, the fire protection insulating compound 7 may preferably be a magnesium oxychloride cement, in whole or in part, which may also contain magnesium sulphate. This feature and the compositions given above, which differ from the stoichiometry of the

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As already mentioned, inventive significance is also attributed to the reactions taking place.

In order to achieve the desired properties, it is necessary that the specified minimum amount of magnesium chloride in the ratios MgCl ₂ / Mg(OH) ₂ / H ₂ O of 1 : (2.5 to 5): (8 to 12) and MgCl ₂ / MgSO ₄ of 1 : (0.02 to 1.9) is not undercut, since otherwise there may be a considerable drop in fire resistance compared to the maximum value achievable according to the invention.

However, in the case of the production of magnesium oxychloride-magnesium oxysulfate cement, part of the magnesium chloride used to produce the fireproof insulating compound 7 can be replaced by a metal chloride, such as calcium chloride, whose cation forms poorly soluble sulfates. In the production of the insulating compound 7, a sedimentation reaction takes place according to the equation

CaCl ₂ + MgSO ₄ -> MgCl ₂ + CaSO ₄ i

in which the magnesium chloride is formed from the other metal chloride in the manufacturing process itself. The precipitated, poorly soluble metal sulfate, in the case shown gypsum, can act as a filler in the hardened insulating compound 7, but can also contribute to a further improvement in properties.

If the fire protection insulating compound 7 contains water glass, in particular soda water glass, this results in greater strength and water resistance as well as increased fire resistance of the compound. In particular, it has proven to be advantageous if the soda water glass has a composition with an average molar ratio Na ₂ O / SiO ₂ of 1 : (1.5 to 4.0) and if the soda water glass is introduced into the insulating compound 7 in initially liquid form, whereby it should have a density of approximately 1.32 to 1.55 g/cm ^3. The amount of water glass introduced into the insulating compound 7 should be selected such that the magnesium oxychloride cement or magnesium oxychloride-magnesium oxysulfate cement has a composition with an average molar ratio of MgCl ₂ to soda water glass of approximately 1 : (0.02 to 0.35).

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It has already been stated that it is advantageous if the insulating compound 7 contains silica. This can be added as an amorphous powder, for example. The presence of silica in the insulating compound 7 brings about similar improvements in properties as those of water glass, but it also enhances its effect.

As is well known, silica is a collective term for compounds that can contain silicon dioxide and varying amounts of water. A distinction is made between orthosilicic acid, various types of polysilicic acid and metasilicic acid and finally the so-called phyllosilicic acid, whereby the aforementioned silicas are characterized by an increasing degree of condensation and decreasing water content in the order given, and in the final stage of the condensation, which takes place with the formation of chain molecules, almost anhydrous silicon dioxide is formed.

Silica can be produced by precipitation using metal salt and/or acid from water glass, whereby at a low degree of condensation it is initially present as a (liquid) hydrosol and at a corresponding temperature (starting at room temperature or slightly above) and at a corresponding pH value (greater or less than about 3.1 - 3.3) a coating of the colloidally dispersed silica particles begins, which can lead to gel formation. In such a (solidified) gel, the silica is arranged in a net and/or honeycomb-like structure with a high specific surface area and porosity in the water. The fact of the sol-gel reaction can be exploited according to the invention by producing the silica by precipitation using metal salt and/or acid from water glass initially contained in the insulating compound 7. This advantageously results on the one hand in an increase in strength and fire resistance, and on the other hand the amount of shrinkage of the hardening insulating compound 7 is also reduced.

The fire protection insulating compound 7 is - as stated - introduced into the hollow chamber H in a flowable state. Preferably, a fire protection insulating compound 7 is used to produce a magnesium oxychloride cement, which is produced from a mixture of magnesium oxide (reactive burnt magnesia) and concentrated, in particular saturated or supersaturated, aqueous magnesium chloride solution and can also be produced with the addition of magnesium sulfate. In the latter case, the addition of a metal chloride, such as

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Calcium chloride, whose cation forms poorly soluble sulfates such as calcium sulfate.

The insulating mass 7 can further be produced with the addition of water glass, in particular sodium water glass in liquid solution, wherein preferably two partial mixtures, one from the mentioned starting materials for the magnesium oxychloride cement and another from the water glass, optionally mixed with magnesium sulfate, are stirred to form a highly viscous suspension.

The insulating compound 7 can also contain silica, which is preferably produced in the manufacturing process of the insulating compound 7 by precipitation using acid or salt from water glass. Mineral and/or organic acids can be used to set a suitable pH value. An insulating compound 7 which is produced from a mixture of 35 ± 25 mass percent MgCl ₂ , 13 ± 12 mass percent MgSO ₄ , 35 ± 25 mass percent MgO and 5.1 ± 5.0 mass percent water glass has proven particularly useful, whereby the portion of the aqueous water glass solution can optionally contain the acid used to react with the water glass.

As already mentioned above, the invention can achieve a fire resistance class of up to F120. The invention is not limited to the various embodiments shown, but also includes all equivalent versions. For example, the expert can provide additional advantageous measures, such as the addition of fillers or pigments to the fire protection insulating compound 7, with zinc oxide, titanium oxide and aluminum oxide being particularly suitable for this. Embedding reinforcing parts or materials, such as glass fibers or a fabric made of plastic, wire, glass fibers or the like, in the fire protection insulating compound 7 can also be provided as a measure that further enhances the advantages of the invention.

Claims (34)

1. Fire-resistant profile component for producing windows, doors, wall elements, facades and the like, comprising two essentially U-shaped profile parts made of extruded aluminum, which form an inner support shell ( 3 ) and an outer support shell ( 4 ) and are connected at their free leg ends ( 300 , 301 or 400 , 401 ) of the legs ( 5 ) by means of thermally isolating insulating webs ( 6 ) to form a composite profile ( 35 ) surrounding a single hollow chamber (H), and the hollow chamber (H) is filled with a fire-protection insulating compound ( 7 ). 2. Fire-resistant profile component according to claim 1, characterized in that the free leg ends ( 300 , 301 , 400 , 401 ) of the inner support shell ( 3 ) and outer support shell ( 4 ) each have an undercut groove ( 302 , 402 ) into which the insulating webs ( 6 ) can be inserted in a form-fitting manner to form a statically supporting composite profile ( 35 ). 3. Fire-resistant profile component according to claim 1 or 2, characterized in that when the inner support shell ( 3 ) or outer support shell ( 4 ) melts, a statically supporting profile can be formed by means of the remaining inner or outer support shell ( 3 , 4 ) and the fire protection insulating compound ( 7 ). 4. Fire-resistant profile component according to one of claims 1 to 3, characterized in that the fire protection insulating compound ( 7 ) is connected to the composite profile ( 35 ) in a form-fitting and/or force-fitting manner. 5. Fire-resistant profile component according to one of claims 1 to 4, characterized in that the fire protection insulating compound ( 7 ) is mineral-based. 6. Fire-resistant profile component according to one of claims 1 to 5, characterized in that the fire protection insulating compound ( 7 ) contains crystalline bound water which can be released upon exposure to heat. 7. Fire-resistant profile component according to one of claims 1 to 6, characterized in that the fire protection insulating mass ( 7 ) is reinforced with a metallic wire mesh ( 8 ). 8. Fire-resistant profile component with a fire protection insulating compound ( 7 ) that can be filled into a hollow chamber (H), in particular according to one of claims 1 to 7, characterized in that the fire protection insulating compound ( 7 ) contains magnesium oxychloride cement or consists entirely of magnesium oxychloride cement. 9. Fire-resistant profile component according to claim 8, characterized in that the magnesium oxychloride cement has a composition with a molar ratio MgCl ₂ /Mg(OH) ₂ /H ₂ O of 1 : ( 2.5 to 5 ) : ( 8 to 12 ). 10. Fire-resistant profile component according to claim 8 or 9, characterized in that the fire protection insulating compound ( 7 ) is made from a mixture of magnesium oxide (burnt magnesia) and concentrated, in particular saturated or supersaturated, aqueous magnesium chloride solution. 11. Fire-resistant profile component according to one of claims 8 to 10, characterized in that the fire protection insulating compound ( 7 ) contains magnesium sulfate, whereby a magnesium oxychloride-magnesium oxysulfate cement is formed. 12. Fire-resistant profile component according to claim 11, characterized in that the magnesium oxychloride-magnesium oxysulfate cement has a composition with a molar ratio MgCl ₂ /MgSO ₄ of 1: (0.02 to 1.9). 13. Fire-resistant profile component according to one of claims 1 to 12, characterized in that the fire protection insulating compound ( 7 ) contains water glass, in particular soda water glass. 14. Fire-resistant profile component according to claim 13, characterized in that the soda water glass has a composition with an average molar ratio Na ₂ O/SiO ₂ of 1: (1.5 to 4.0). 15. Fire-resistant profile component according to claim 13 or 14, characterized in that the soda water glass is initially present in liquid form in the fire protection insulating compound ( 7 ), wherein it has a density of 1.32 to 1.55 g/cm ³ . 16. Fire-resistant profile component according to claim 8 and one of claims 13 to 15, characterized in that the magnesium oxychloride cement or magnesium oxychloride-magnesium oxysulfate cement has a composition with an average molar ratio of MgCl ₂ to soda water glass of 1: (0.02 to 0.35). 17. Fire-resistant profile component according to one of claims 1 to 16, characterized in that the fire protection insulating compound ( 7 ) initially contains a metal chloride, such as calcium chloride, the cation of which forms poorly soluble sulfates, such as calcium sulfate, in the fire protection insulating compound ( 7 ). 18. Fire-resistant profile component according to one of claims 1 to 17, characterized in that the fire protection insulating compound ( 7 ) contains silica, in particular in gel form. 19. Fire-resistant profile component according to claim 18, characterized in that the silica is produced by precipitation by means of metal salt and/or acid from water glass initially contained in the fire protection insulating compound ( 7 ). 20. Fire-resistant profile component according to one of claims 1 to 19, characterized in that the fire protection insulating compound ( 7 ) is made from a mixture of 35 ± 25 mass percent MgCl ₂ , 13 ± 12 mass percent MgSO ₄ , 35 ± 25 mass percent MgO and 5.1 ± 5.0 mass percent of an aqueous solution of soda water glass, wherein this solution may contain a mineral and/or organic acid. 21. Fire-resistant profile component according to one of claims 1 to 20, characterized in that at least one molded part ( 36 ) prefabricated from the fire protection insulating compound ( 7 ) is provided with a cross section corresponding to the cross section of the hollow chamber (H) and is arranged in the hollow chamber (H). 22. Fire-resistant profile component according to one of claims 1 to 20, characterized in that a hardening fire protection insulating compound ( 7 ) which can be filled into the hollow chamber (H) is provided. 23. Fire-resistant profile component according to one of claims 1 to 22, characterized in that the outer support shell ( 4 ) has, on its outer side facing away from the hollow chamber (H), a groove ( 405 ) for receiving a seal ( 10 ) for a glazing ( 2 ). 24. Fire-resistant profile component according to one of claims 1 to 23, characterized in that the inner support shell ( 3 ) and/or outer support shell ( 4 ) have grooves ( 303 , 304 , 403 , 404 ) for receiving seals ( 14 ) which foam under the influence of heat. 25. Fire-resistant profile component according to one of claims 1 to 24, characterized in that a glass strip ( 11 ) can be attached to the outside of the inner support shell ( 3 ) and/or outer support shell ( 4 ) facing away from the hollow chamber (H). 26. Fire-resistant profile component according to one of claims 1 to 25, characterized in that the inner support shell ( 3 ) and/or outer support shell ( 4 ) have on their outer side facing away from the hollow chamber (H) a protruding stop leg ( 21 ) with a groove formed therein, into which a stop seal ( 22 ) can be inserted. 27. Window or door, comprising at least one frame (R) made of sections of the fire-resistant profile components according to one of claims 1 to 26 and a glazing ( 2 ) made of fire-resistant glass held within the frame (R). 28. Window or door according to claim 27, characterized in that the glazing ( 2 ) is provided in its edge region with U-shaped metallic molded parts ( 13 ) which are plugged onto the glazing ( 2 ), and the molded parts ( 13 ) are screwed to the inner support shell ( 3 ) and the outer support shell ( 4 ) of the profile components in the region of the side legs ( 5 ). 29. Window or door according to claim 27 or 28, characterized in that a seal ( 14 ) which foams under the influence of heat is arranged between the glazing ( 2 ) and the frame (R). 30. Window or door according to one of claims 27 to 29, characterized in that between the glazing ( 2 ) and the frame (R) there is provided a U-shaped metallic retaining strip ( 33 ) which surrounds and holds the glazing ( 2 ) at the edge and has side legs ( 33a ) and a base leg ( 33b ) connecting them, wherein the side legs ( 33a ) are hollow and the base leg ( 33b ) is screwed to the inner support shell ( 3 ) and the outer support shell ( 4 ) of the frame (R) in the region of the side legs ( 5 ). 31. Window or door according to one of claims 27 to 30, characterized in that the frame (R) holding the glazing ( 2 ) is movably held as a sash frame ( 16 ) on a frame ( 15 ) made of sections of the profile components to form a circumferential rebate chamber (F), and a lock ( 17 ) on the side of the sash frame ( 16 ) facing the rebate chamber (F) and a locking plate ( 19 ) engageable with the lock on the side of the frame ( 15 ) facing the rebate chamber (F) are each fastened with the interposition of a connecting strap ( 18 ) and the connecting straps ( 18 ) are fastened by means of screws to the legs ( 5 ) of the outer support shell ( 4 ) and inner support shell ( 3 ) of the frame ( 15 ) or sash frame ( 16 ). 32. Window or door according to claim 31, characterized in that an anchor part ( 20 ) is applied to the frame ( 15 ) on the side facing away from the rebate chamber (F) and is fastened by means of screws to the side legs ( 5 ) of the inner support shell ( 3 ) and outer support shell ( 4 ) of the frame ( 15 ). 33. Window or door according to claim 31 or 32, characterized in that a guide tube ( 24 ) for receiving a locking bar ( 25 ) in the fire protection insulating compound ( 7 ) is arranged in a post ( 23 ) of the frame ( 15 ). 34. Window or door according to one of claims 31 to 33, characterized in that on the side of the frame ( 15 ) facing the rebate chamber (F) in the region of the side leg ( 5 ) of the outer support shell ( 4 ) a receiving groove ( 29a ) is formed, into which a central web seal ( 29 ) protruding into the rebate chamber (F) can be inserted, and in the region of the sash frame ( 16 ) opposite the receiving groove ( 29a ) and facing the rebate chamber (F) a stop edge ( 29b ) for the central web seal ( 29 ) is formed on the side leg ( 5 ) of the outer support shell ( 4 ) of the same.