EP3701111B1 - Building facade element embodied as an insulating glass unit - Google Patents

Description

The invention relates to a building facade element which is designed as an insulating glass unit according to the preamble of claim 1.

In the area of building facades, increasing value is being placed on the aesthetics of the built-in elements and the overall aesthetics of the building. There is a demand for large-area glass facades, particularly in the case of building complexes of large companies or shops. Large-area glass facades are assembled from several elements of an insulating glass unit. In order to meet the required requirements in the area of building insulation and thus also to keep the costs for heating and the use of air conditioning systems within limits, the insulating glass units are made up of several glass panes. For better thermal insulation, an inner space between the glass panes is filled with a gas with low thermal conductivity. To create the interior, the glass panes are connected to one another in a gas-tight manner via spacers, in particular also via the combination of different spacers, and sealants. The sealing between the spacers and the glass panes and in particular the sealing of the abutting area of two spacers is of central importance for the creation of the gas-tight interior. In the case of large-area glass facades, which are composed of several elements of the insulating glass units, the spacers can lead to an undesirable optical impairment in the transition area of the elements. Such an impairment can be avoided or at least reduced by transparent spacers, in particular glass spacers.

The insulating glass units known from the prior art either do not meet the requirements for the gas tightness of the interior or impair the optical appearance of the insulating glass units due to the spacers used.

The German utility model DE 94 11 674 U1 describes an element for a facade cladding made of glass, with a glazing bead serving as a spacer between two parallel panes of glass. In this case, however, only an airtight interior is created and not the gas-tight interior required for thermal insulation.

From the pamphlet WO 2015/086457 A2 describes an insulating glazing for a building that comprises at least two panes, a peripheral polymeric or metal spacer, appropriate sealants between the panes and the spacers, and appropriate sealants in the outer space between the panes and an air- or gas-filled space. The connection of two spacers at the corners of the insulating glazing takes place via corner connectors, in particular a plastic molded part, in which two spacers provided with a fermentation cut collide. The interior of the glazing between the panes is filled with an inert gas before the arrangement is pressed.

From the Patent specification WO 2017/157634 A1 an insulating glass unit that can be filled with air or gas is known, which has at least one transparent spacer, in particular a spacer made of glass. For the connection between the glass pane and the spacer, a first water-impermeable seal, in particular made of a transparent acrylic adhesive tape, and a second gas-tight and water vapor-tight seal, in particular made of transparent butyl, are provided. The insulating glass unit is intended for a climatic chamber and is not suitable for a building facade, partly because the seal, in particular the transparent butyl used here, does not have sufficient resistance to natural UV radiation.

Also the print WO 2017/157636 A1 shows an insulating glass unit for a climate controlled unit. Glass spacers are used here, which come from the cut of a glass pane and are installed directly in the unprocessed raw state. These glass spacers are connected to the glass pane using a sealant, wherein the sealant fills the superficial asperities of the unfinished glass spacer in the gap.

The German utility model specification DE 20 2017 104 538 U1 shows an insulating glass element with spacers made of glass and plastic or aluminum for multi-pane doors. The connection between the glass pane and the spacer is made using an EVA (ethylene vinyl acetate) film, with the EVA film strips being arranged so that they overlap at the four corner points from the horizontal spacer to the vertical spacer. The edges are sealed by filling the space between the upper and lower glass panes up to the transversely inserted aluminum spacer with a sealing compound, preferably black polysulfide.

The Patent specification EP 2 456 942 B1 describes a multiple pane glazing unit with a tempered glass spacer bar and without a gas tight interior.

From the European patent applications EP 3 147 443 A1 and EP 0 470 373 A1 shows a sealing of laminated glass elements in general. The use of transparent spacers, in particular spacers made of glass, is not described therein.

WO 2016/091954 A1 describes a building facade element according to the preamble of claim 1.

The object of the invention is to provide a building facade element designed as an insulating glass unit, the insulating glass unit having a gas-tight interior and not impairing the visual appearance.

The invention solves the problem by a building facade element with the features of claim 1. Expedient refinements and advantageous developments of the invention are specified in the dependent claims.

The building facade element mentioned at the beginning is designed as an insulating glass unit, with at least one first and one second glass pane, with at least one glass spacer made of glass, which has at least one first sealant with each glass pane is connected, with at least one further spacer, wherein the spacer is gas-tight or has a gas-tight layer and wherein the further spacer is connected to each glass pane via at least one second sealant, with at least one joint area of a glass spacer and a further spacer, wherein the at least a glass spacer, the at least one further spacer and the glass panes form a closed interior is characterized according to the invention in that the at least one joint area is sealed gas-tight via a third sealant, the third sealant containing butyl and being guided over the joint area.

Furthermore, the third sealant of the building facade element, which gas-tightly seals the joint area of a glass spacer and a further spacer, can comprise a metal-containing strip.

A metal-containing band is to be understood here in particular also as a metal-containing plastic band and a metal band.

According to the invention, the additional spacer has a recess in the area of the at least one joint area. The area of the further spacer that remains due to the recess is guided along a transverse side of the glass spacer. Preferably, the first sealant consists of a first primary sealant on the side facing the interior and a first secondary sealant on the side facing the exterior. The first secondary sealing means is particularly preferably also applied to the transverse side of the glass spacer. In an advantageous embodiment, the area of the further spacer that remains due to the recess does not extend over the entire length of the transverse side of the glass spacer. The third sealing means is preferably guided from the remaining transverse side of the glass spacer to the outside of the further spacer.

Next, the building facade element at least one additional layer of the third sealant, which closes the joint area gas-tight, or a layer of silicone or have a layer of the third sealant and silicone applied to the edge of the insulating glass unit.

The sealants used in the building facade element are preferably resistant to natural UV radiation.

In an advantageous embodiment of the building facade element, the first sealant, via which the glass spacer is connected to the glass panes, or the second sealant, via which the further spacer is connected to the glass panes, or both of the sealants mentioned, consist of a primary sealant which is on the interior is arranged facing side, and a secondary sealant, which is arranged on the side facing the outdoor area. At least one of the primary and secondary sealants mentioned is preferably transparent. Further, one or both of the primary sealants may include acrylic. In a preferred embodiment, one of the primary sealants or both primary sealants are designed as double-sided adhesive tape. Preferably, one or both of said secondary sealants includes butyl.

In an advantageous embodiment, the first sealant consists of a first primary sealant on the side facing the interior and a first secondary sealant on the side facing the exterior, the first primary sealant being acrylic and the first secondary sealant being resistant to natural UV radiation butyl included. Preferably, the first secondary sealant is a black butyl sealant. Most preferably, the first primary sealant is transparent.

Furthermore, the interior of the building facade element is filled with gas, in particular with argon, krypton, xenon or a mixture of these gases.

In a further embodiment, at least one of the glass panes of the building façade element is provided with a metallic coating on at least one side.

In an advantageous embodiment of the building facade element, the at least one further spacer is a plastic spacer or a metal spacer, in particular an aluminum or stainless steel spacer.

The at least one further spacer is preferably provided with a desiccant.

In a preferred embodiment, the gas-tight layer of the at least one further spacer is a metal-containing strip.

The at least one further spacer of the building facade element can preferably be pierced in order to fill the interior space with gas.

In a further embodiment, the at least one glass spacer of the building facade element consists of a plurality of components lined up in a row or the at least one further spacer consists of a number of components lined up in a row, or both are present.

Fig. 1

eine Draufsicht auf das Gebäudefassadenelement ausgebildet als Isolierglaseinheit bei fehlender oberer Glasscheibe;

Fig. 2

eine erste Ausgestaltung der Verbindung eines Glasabstandshalters mit den Glasscheiben;

Fig. 3

eine zweite Ausgestaltung der Verbindung eines Glasabstandshalters mit den Glasscheiben;

Fig. 4

eine dritte Ausgestaltung der Verbindung eines Glasabstandshalters mit den Glasscheiben;

Fig. 5

eine vierte Ausgestaltung der Verbindung eines Glasabstandshalters mit den Glasscheiben;

Fig. 6

eine fünfte Ausgestaltung der Verbindung eines Glasabstandshalters mit den Glasscheiben;

Fig. 7

eine erste Ausgestaltung der Verbindung eines weiteren Abstandshalters mit den Glasscheiben;

Fig. 8

eine zweite Ausgestaltung der Verbindung eines weiteren Abstandshalters mit den Glasscheiben;

Fig. 9

eine erste Ausgestaltung der Abdichtung des Stoßbereichs eines Glasabstandshalters und eines weiteren Abstandshalters;

Fig. 10

eine zweite Ausgestaltung der Abdichtung des Stoßbereichs eines Glasabstandshalters und eines weiteren Abstandshalters.

The invention is described in detail below using exemplary embodiments with reference to the accompanying drawings. These show:

1

a plan view of the building facade element designed as an insulating glass unit with no upper glass pane;

2

a first embodiment of the connection of a glass spacer with the glass panes;

3

a second embodiment of connecting a glass spacer to the glass panes;

4

a third embodiment of connecting a glass spacer to the glass panes;

figure 5

a fourth embodiment of connecting a glass spacer to the glass panes;

6

a fifth embodiment of connecting a glass spacer to the glass panes;

7

a first configuration of the connection of a further spacer to the glass panes;

8

a second embodiment of the connection of a further spacer to the glass panes;

9

a first configuration of sealing the abutting portion of a glass spacer and another spacer;

10

a second embodiment of the sealing of the joint area of a glass spacer and another spacer.

1 shows the insulating glass unit 1 without the second glass pane 3. Glass spacers 4 are attached to the two long sides of the first glass pane 2 and the further spacers 6 are attached to the short sides. The glass spacers 4 are arranged flush with the outer edge of the first glass pane 2, whereas the other spacers 6 are offset somewhat in the direction of the interior 10. In addition, the glass spacers 4 do not reach all the way to the transverse side of the second glass pane 3 , a part of the transverse side of the glass spacers 4 being covered by a part of the further spacer 6 . Furthermore, third sealing means 11 are shown, the over the four joint areas 9 of the glass spacers 4 and the further spacers 6 are guided.

2 shows a first embodiment of the connection of a glass spacer 4 to the glass panes 2, 3 of the insulating glass unit 1. In the area between the glass panes 2, 3 and the glass spacer 4, a first sealant 5, 5' is attached. Furthermore, the interior 10 of the insulating glass unit 1 is shown. The outer edge of the glass spacer 4 ends with the outer edges of the glass panes 2, 3, whereas the first sealing means 5, 5' does not quite reach the outer edge. In an alternative embodiment that is not shown, the first sealing means 5, 5' can also be guided up to the outer edge.

3 shows a second embodiment of in 2 shown connection of a glass spacer 4 with the glass panes 2, 3. The first sealant 5, 5 'in each case consists of a first primary sealant 13 on the side facing the interior 10 and a first secondary sealant 14 on the side facing the exterior. The first secondary sealant 14 closes with the edges of the glass panes 2, 3 from.

4 shows a third embodiment of the connection of a glass spacer 4 with the glass panes 2, 3 according to 3 . A further layer 12 is applied to the outer edge and extends over the glass panes 2 , 3 and the glass spacer 4 .

figure 5 shows a fourth embodiment of the connection of a glass spacer 4 with the glass panes 2, 3 according to 4 , wherein the first secondary sealant 14 is not applied in the space between the glass spacer 4 and the glass panes 2, 3 but on the outer edge. The further layer 12 extends over the first secondary sealant 14.

6 shows a fifth embodiment of the connection of a glass spacer 4 with the glass panes 2, 3. The outer edge of the glass spacer 4 is offset in comparison to the outer edges of the glass panes 2, 3 in the direction of the interior 10. The first primary sealant 13 is attached between the glass spacer 4 and the glass panes 2, 3. On the outer edge of the glass spacer 4 in the area between the glass panes 2, 3, the first secondary sealant 14 and then the further layer 12 is arranged. The further layer 12 closes with the outer edge of the glass panes 2, 3 from.

7 shows a first embodiment of the connection of a further spacer 6 with the glass panes 2, 3. The outer edge of the further spacer 6 is offset in comparison to the outer edges of the glass panes 2, 3 in the direction of the interior 10. A second sealant 8, 8' is fitted between the glass panes 2, 3 and the additional spacer 6, each consisting of a second primary sealant 15 on the side facing the interior 10 and a second secondary sealant 16 on the side facing the exterior side, consists. The additional spacer 6 has a gas-tight layer 7 on the side facing the outside area. An adhesive 17 is applied to the outer edge of the further spacer 6 in the area between the glass panes 2, 3 and is flush with the outer edge of the glass panes 2, 3.

8 shows a second embodiment of the connection of a further spacer 6 with the glass panes 2, 3 according to 7 . In this case, three of the further spacers 6 with the corresponding sealing means 8, 8′ or the second primary sealing means 15 and the second secondary sealing means 16 are arranged one behind the other. The gas-tight layer 7 only has the outermost of the three further spacers 6 .

In 9 the insulating glass unit 1 is shown without the second glass pane 3 with a first embodiment of a sealing of the joint area 9 of a glass spacer 4 and a further spacer 6 . The glass spacer 4 and the further spacer 6 are attached to the first glass pane 2 . On the side facing the glass panes 2, 3, the glass spacer 4 has the first primary sealing means 13. The first secondary sealant 14 is in the area of the upper and lower outer edge of the glass spacer 4 and on the transverse side of the Glass spacer 4, which faces the joint area 9 applied. The additional spacer 6 has the second primary sealant 15 on the side facing the glass panes 2 , 3 and the second secondary sealant 16 in the region of the upper and lower outer edges of the additional spacer 6 . A gas-tight layer 7 is applied to the side of the further spacer 6 facing the outside. In the joint area 9 the further spacer 6 has a recess, the further spacer 6 being cut out on the side facing the interior 10 up to the start of the second secondary sealing means 16 . The further spacer 6 and the glass spacer 4 abut one another in such a way that the area of the further spacer 6 remaining through the recess is guided along the transverse side of the glass spacer 4, which is provided with the first secondary sealant 14. This remaining, non-recessed part of the further spacer 6 does not extend over the entire length of the transverse side of the glass spacer 4. The third sealant 11 is attached to the remaining part of the transverse side of the glass spacer 4, which is provided with the secondary sealant 14. The third sealing means 11 is guided from the transverse side of the glass spacer 4 over the transverse side of the non-recessed part of the further spacer 6 to the outside of the further spacer 6, the gas-tight layer 7.

10 showed a second embodiment of the sealing of the joint area 9 according to FIG 9 . The part of the additional spacer 6 that is not recessed extends to just before the outer edge of the transverse side of the glass spacer 4. Contrary to FIG 9 In the embodiment shown, no first secondary sealant 14 is applied to the transverse side of the glass spacer 4 . The third sealing means 11 is guided from the outside of the glass spacer 4 over the transverse side of the non-recessed part of the further spacer 6 to the outside of the further spacer 6, the gas-tight layer 7.

The elements of a glass facade must meet both aesthetic requirements and functional requirements, especially with regard to thermal insulation. For this purpose, insulating glass units 1 are used, whose individual glass panes 2, 3 are connected to one another via spacers in such a way that a gas-tight Interior 10 is formed, which can be filled with gas, in particular a gas with low thermal conductivity, such as argon, xenon, krypton or a mixture of these.

In order to avoid optical impairment of the insulating glass unit 1 and to obtain an optical all-glass appearance, glass spacers are used, at least on the visible sides of the insulating glass unit 1 to be installed. The glass spacers 4 preferably have the same composition as the individual glass panes 2, 3 of the insulating glass unit 1. In order to obtain a gas-tight interior 10, the glass spacers 4 are connected to the glass panes 2, 3 via first sealing means 5, 5', as in FIGS Figures 2-6 is shown.

This in 2 The first sealant 5, 5' shown is preferably a transparent sealant containing acrylic, in particular in the form of a double-sided adhesive tape. By an acrylic sealant is meant a sealant that includes or consists of acrylic. In addition to the transparency, the required elasticity and mechanical stability of the connection between the glass panes 2, 3 and the glass spacer 4 is possible with such an acrylic sealant. The acrylic sealant in the form of a double-sided adhesive tape also enables easy processing and thus facilitates the manufacturing process of the insulating glass unit 1.

That in the Figures 3-6 The first primary sealant 13 shown is preferably the acrylic sealant described above in the form of a double-sided adhesive tape. The first secondary sealant 14 of Figures 3-6 preferably includes butyl. A butyl sealant is understood to mean a sealant that contains or consists of butyl. Such a butyl sealant has a high level of gas impermeability and, in addition to the first primary sealant 13, is intended to ensure the gas-tight connection of the glass spacer 4 to the glass panes 2, 3.

In the 4 The further layer 12 shown, which is attached to the outer edge, can consist in particular of the butyl sealant described above or of silicone. A silicone layer serves in particular to protect the first secondary Sealant 14, in particular the pasty butyl sealant. In the alternate embodiment, off figure 5 For example, a further layer 12, preferably in the form of a silicone layer, is applied over the layer of the first secondary sealant 14 applied on the outside. At the in 6 shown embodiment is applied to the layer of the first secondary sealant 14, a further layer 12, preferably made of the described butyl sealant or silicone.

In addition to the glass spacers 4, such as 1 shows, further spacers 6 are used, among other things, to introduce a desiccant, which is in particular connected to the interior 10, into the insulating glass unit 1. The desiccant introduced into the further spacer 6, which can include, for example, silica gels, molecular sieves, CaCl ₂ , Na ₂ SO ₄ , activated carbon, silicates, bentonites, zeolites and/or mixtures thereof, serves to absorb the residual moisture present in the interior 10 of the insulating glass unit 1 . This prevents the glass panes 2, 3 from fogging up on the side facing the interior 10 as a result of moisture condensation. Commercially available plastic spacers are preferably used as additional spacers 6 . The body of the plastic spacer, which enables air or gas exchange with the interior 10 of the insulating glass unit 1, is filled with a desiccant. On the two sides facing the glass panes 2, 3, the plastic spacer has second sealants 8, 8', in particular a second primary sealant 15, preferably in the form of a sealant that contains acrylic, and a second secondary sealant 16, preferably a sealant that contains butyl. on. The second secondary sealing means 16 adjoins the second primary sealing means 15 facing the interior 10 . The long side of the plastic spacer facing the outside area has a gas-tight layer 7, preferably in the form of a metal-containing strip, in particular a plastic strip coated with aluminum. The gas-tight layer 7 prevents gas exchange through the plastic spacer to the outside. In addition to the plastic spacers, other spacers, for example metal spacers, in particular aluminum or stainless steel spacers, are also conceivable as further spacers 6 .

The adhesive 17 in the Figures 7 and 8 Possible configurations of the connection of a further spacer 6 to the glass panes 2, 3 shown, is preferably a silicone or polyurethane adhesive. As a result, the glass panes 2, 3 are bonded to one another in addition to the second sealing means 8, 8' or the second primary sealing means 15 and the second secondary sealing means 16. The insulating glass unit 1 designed as a building facade element is fastened to a building facade preferably via carrier elements which are arranged in the area of the further spacers 6 . There is therefore little or no visual impairment from the additional spacers 6 or the adhesive 17 .

In the 8 The embodiment shown, in which several of the further spacers 6 are arranged one behind the other, serves, among other things, to introduce more desiccant into the insulating glass unit 1 . In order to enable the gas exchange of the interior 10 with all of the additional spacers 6 , only the outermost of the additional spacers 6 has a gas-tight layer 7 .

For the use of the insulating glass unit 1 as an element of a building facade, it is necessary for the sealants 5, 5′, 8, 8′, 11 used to have sufficient resistance, in particular to natural UV radiation. A sealant is considered to be resistant to natural UV radiation if, for example, it does not show any significant changes over a period of 3000 hours after the treatment specified in DIN EN ISO 4892-2. However, other definitions of UV resistance that are obvious to the person skilled in the art are also possible, such as treatment in accordance with the American standard ANSI Z97.1 - 2015, in which case no significant change should occur over a period of 3000 hours. Since sealants that contain transparent butyl do not have sufficient resistance to natural UV exposure, a black butyl sealant that has the required UV resistance is used as the butyl sealant, in particular for the secondary sealants 14, 16. The optical impairment of the insulating glass unit 1 by the secondary sealant 14, 16, in particular due to the secondary sealant 14 applied in the area of the glass spacers 4, is small because this is applied only thinly.

In order to obtain a gas-tight interior 10, it is necessary, in addition to the gas-tight connection between the glass spacer 4 and the glass panes 2, 3 and the further spacer 6 and the glass panes 2, 3, to make the joint area between a glass spacer 4 and a further spacer 6 gas-tight close. In particular, the transverse side of the further spacers 6, which does not have a gas-tight layer 7 and would therefore enable gas exchange, must be taken into account. The 9 and 10 show two possible configurations, with the inner part of the further spacer 6, in particular a plastic spacer, being cut out for the recesses of the further spacers 6 in the joint area 9. The third sealant 11, which is guided from the glass spacer 4 to the outside of the further spacer 6, covers in particular the gas-permeable transverse side of the further spacer 6. The third sealant 11 is in particular a sealant that contains butyl or a metal-containing tape is used. A butyl strip laminated with a metal-containing strip, in particular a butyl strip laminated with an aluminum strip, is preferably used as the third sealing means 11 .

In order to fill the interior 10 of the insulating glass unit 1 with gas, the at least one further spacer 6 is pierced at at least two points, for a gas inlet and a gas outlet. The interior 10 is then filled with the gas to be introduced via the inlet until only the gas to be introduced can be detected at the outlet. The inlet and the outlet are then sealed in a gas-tight manner using a sealant, in particular a butyl sealant.

For the production of a building façade element according to the invention designed as an insulating glass unit 1, glass spacers 4 are attached via the first primary sealant 13, preferably in the form of the double-sided acrylic adhesive tape described above, and via the first secondary sealant 14 applied to the outer edges of the glass spacer 4, preferably in the form of a butyl cord , on the long side of the lower one first glass pane 2 applied. The other spacers 6, preferably in the form of the commercially available plastic spacers described, are provided with the recesses described and attached to the transverse sides of the first glass pane 2, adjoining the glass spacers 4. After placing the second glass pane 3, the insulating glass unit 1 is pressed. The joint area 9 is then sealed using the third sealant 11, the interior 10 is filled with gas, the adhesive 17 is applied to the outside of the plastic spacers and one or more further layers 12 of a butyl sealant or silicone are applied to the Edge of the insulating glass unit 1.

In further configurations, at least one of the glass panes 2, 3 can be provided with a metallic layer, such as a sun protection layer or a heat protection layer.

Insulating glass units 1 are also conceivable, which are made up of more than two glass panes 2, 3 and several interior spaces 10.

Due to the length of the building facade elements, it is also possible for a glass spacer 4 to consist of a number of components, in particular of a number of glass components lined up next to one another.

Reference sign

1

insulating glass unit

2

First pane of glass

3

Second pane of glass

4

glass spacer

5

First sealant

6

spacers

7

gas-tight layer

8th

Second sealant

9

impact area

10

inner space

11

Third sealant

12

layer

13

First primary sealant

14

First secondary sealant

15

Second primary sealant

16

Second secondary sealant

17

adhesive

Claims (14)

1. Building facade element, embodied as an insulating glass unit (1) comprising:

   - at least a first (2) and a second (3) glass pane;

   - at least one glass spacer (4) made of glass, which is connected to each glass pane (2, 3) by at least one first sealant (5, 5');

   - at least one additional spacer (6), which is gas-tight or has a gas-tight layer (7), and is connected to each glass pane (2, 3) by at least one second sealant (8, 8');

   - at least one joining region (9) between a glass spacer (4) and an additional spacer (6);

   - wherein the at least one glass spacer (4), the at least one additional spacer (6) and the glass panes (2, 3) form a closed inner chamber (10),

   characterized in that the additional spacer (6) has a recess in the region of the at least one joining region (9), the region of the additional spacer (6) remaining through the recess being guided along a short side of the glass spacer (4), and the at least one joining region (9) being sealed in a gas-tight manner by means of a third sealant (11) which contains butyl and is guided over the joining region (9).
2. Building facade element according to claim 1, characterized in that the third sealant (11) comprises a metal-containing tape.
3. Building facade element according to claim 1 or 2, characterized in that the first sealant (5, 5') consists of a first primary sealant (13) on the side facing the inner chamber (10) and a first secondary sealant (14) on the side facing the exterior, the first secondary sealant (14) also being applied to the short side of the glass spacer (4).
4. Building facade element according to claim 1 to 3, characterized in that the region of the additional spacer (6) remaining through the recess does not extend over the entire length of the short side of the glass spacer (4), the third sealant (11) being guided from the remaining short side of the glass spacer (4) to the outer side of the further spacer (6).
5. Building facade element according to one of the preceding claims, characterized in that at least one further layer (12) of the third sealant (11) and/or of silicone is applied to the edge of the insulating glass unit (1).
6. Building facade element according to one of the preceding claims, characterized in that the sealants (5, 5', 8, 8', 11) used are resistant to natural UV radiation.
7. Building facade element according to one of the preceding claims, characterized in that the first sealant (5, 5') consists of a first primary sealant (13) on the side facing the inner chamber (10) and a first secondary sealant (14) on the side facing the exterior and/or the second sealant (8, 8') consists of a second primary sealant (15) on the side facing the inner chamber (10) and a second secondary sealant (16) on the side facing the exterior.
8. Building facade element according to claim 7, characterized in that at least one of said sealants (13, 14, 15, 16) is transparent and/or that said first primary sealant (13) and/or said second primary sealant (15) includes acrylic and/or that said first primary sealant (13) and/or said second primary sealant (15) is a double-sided adhesive tape and/or that said first secondary sealant (14) and/or said second secondary sealant (16) includes butyl.
9. Building facade element according to any one of claims 1 to 6, characterized in that the first sealant (5, 5') consists of a first primary sealant (13) on the side facing the inner chamber (10) and a first secondary sealant (14) on the side facing the exterior, wherein the first primary sealant includes acrylic (13) and the first secondary sealant (14) includes a butyl resistant to natural UV radiation.
10. Building facade element of claim 9, characterized in that the first secondary sealant (14) is a black butyl sealant and the first primary sealant (13) is transparent.
11. Building facade element according to one of the preceding claims, characterized in that the inner chamber (10) is filled with gas, in particular argon and/or krypton and/or xenon, and/or that at least one of the glass panes (2, 3) is provided with a metallic coating on at least one side.
12. Building facade element according to one of the preceding claims, characterized in that the at least one additional spacer (6) is a plastic spacer or a metal spacer, in particular an aluminum or stainless steel spacer, and/or in that the at least one additional spacer (6) is provided with a drying agent.
13. Building facade element according to one of the preceding claims, characterized in that the gas-tight layer (7) is a metal-containing strip and/or that the at least one additional spacer (6) is pierceable to fill the inner chamber with gas.
14. Building facade element according to one of the preceding claims, characterized in that the at least one glass spacer (4) consists of a plurality of components arranged in a row and/or the at least one additional spacer (6) consists of a plurality of components arranged in a row.

Images