WO2019120788A1

WO2019120788A1 - Spacer with groove for insulating glazing

Info

Publication number: WO2019120788A1
Application number: PCT/EP2018/081362
Authority: WO
Inventors: Elmar RASTNER; Walter Schreiber; Martin RIGAUD; Giordano Soma
Original assignee: Saint-Gobain Glass France
Priority date: 2017-12-20
Filing date: 2018-11-15
Publication date: 2019-06-27

Abstract

The invention relates to a spacer (I) for multiple-pane insulating glazing, at least comprising a polymer main body (1) comprising a first pane contact wall (2.1), a second pane contact wall (2.2) extending parallel thereto and an outer wall (11), which connects the two pane contact walls (2.1, 2.2); a glazing interior wall (3), which extends parallel to the outer wall (11) and connects the pane contact walls (2.1, 2.2); - an intermediate wall (4), which extends parallel to the outer wall (11) between the glazing interior wall (3) and the outer wall (11) and which, together with the outer wall (11) and the pane contact walls (2.1, 2.2), encloses a drying agent chamber (10), wherein - the glazing interior wall (3) is subdivided by a groove (6) into a first interior wall (3.1) and a second interior wall (3.2), - the groove (6) is arranged parallel to the pane contact walls (2.1, 2.2) and is delimited by a first lateral flank (7.1), a second lateral flank (7.2) and the intermediate wall (4), and a first cavity (5.1) is surrounded by the first interior wall (3.1), the first pane contact wall (2.1), the first lateral flank (7.1) and the intermediate wall (4), and a second cavity (5.2) is surrounded by the second interior wall (3.2), the second pane contact wall (2.2), the second lateral flank (7.2) and the intermediate wall (4).

Description

Spacer with groove for insulating glazing

The invention relates to a spacer for insulating glazing, a glazing and their use.

Insulating glazing usually contains at least two glass or polymeric materials. The disks are separated from each other by a gas or vacuum space defined by the spacer. The thermal insulation capacity of insulating glass is significantly higher than that of single glass and can be further increased and improved in triple glazing or with special coatings.

Further, insulating glazings are known, which include a blackout unit, such as a roller blind or a blind, in the space between the panes, as disclosed, for example, in US6601633B2. Such glazing with internal blind have the advantage that the blinds are protected from damage and contamination.

So that the blinds in the inner space between the panes are not freely movable, they are often mounted in a lateral guide rail or the like. Otherwise, the blind can damage the surfaces of the surrounding panes, which leads to visible scratches, especially on coated panes. There are different starting points for the integration of this lateral guide rail. WO2013 / 117320A1 discloses a spacer with fixed integrated guide rail. WO0214642A1 discloses a spacer with attachable mounting elements that serve as a guide rail.

The spacers generally serve as a reservoir for desiccant at the same time. The desiccant is crucial for the life of an insulating glazing, as the desiccant absorbs moisture from the space between the panes and prevents fogging of the pane from the inside. Therefore, a sufficient volume of desiccant is necessary to ensure a long life of the insulating glazing.

WO2014 / 198431A1 discloses a spacer with integrated groove between two hollow chambers filled with desiccants. A groove is suitable as a guide for a blind and as a guide for a middle pane. However, sufficient loading with desiccant is only guaranteed if the chambers are sufficiently large and if both Chambers are filled with desiccant. The simultaneous filling of two small chambers with desiccant is technically more difficult than the filling of a large chamber. In polymeric spacers, the filling process is further complicated by electrostatic charging of the polymeric body or even completely prevented in very small chambers.

The object of the invention is to provide a polymeric spacer for a glazing, which includes a possibility for fixing a darkening element or a disc and at the same time allows easy filling with desiccant and is also suitable for small interspaces.

The object of the present invention is achieved by a spacer according to the independent claim 1. Preferred embodiments will become apparent from the dependent claims. An insulating glazing according to the invention and its use according to the invention are apparent from further independent claims.

The spacer according to the invention comprises a polymeric base body. The polymeric base body comprises at least three hollow chambers, a first hollow chamber, a second hollow chamber and a desiccant chamber. The desiccant chamber is intended for filling with a desiccant. The polymeric body has a first disc contact wall and a second disc contact wall to which the outer panes are mounted in the finished glazing. The two disc contact walls are connected by an outer wall. The outer wall of the spacer is intended to point in the insulating glazing in the direction of the external environment. Parallel to the outer wall runs the glazing interior wall, which connects the two wafer contact walls. The glazing interior wall is intended to point in the finished glazing in the direction of the inner space between the panes. Between the glazing interior wall and the outer wall runs parallel to the outer wall an intermediate wall which forms the desiccant chamber with the outer wall and the disk contact walls. The glazing interior wall is interrupted by a groove and divided into a first interior wall and a second interior wall. The groove extends parallel to the first disc contact wall and the second disc contact wall and is limited by a first side edge, a second side edge and the intermediate wall. The two side edges form the walls of the first hollow chamber or the second hollow chamber, so that the groove extends between the two hollow chambers. The first The hollow chamber is enclosed by the first interior wall, the first side flank, the first pane contact wall and the intermediate wall. The second hollow chamber is surrounded by the second inner wall, the second disc contact wall, the second side edge and the intermediate wall. The intermediate wall separates the desiccant chamber from the hollow chambers and improves the stability of the entire polymeric base body. The two hollow chambers can be filled or empty. They improve the heat-insulating properties of the spacer compared to a solid version. The groove is intended to receive a guide element of a blackout unit or a disk.

Thanks to the design with the groove, the spacer according to the invention makes it possible to produce insulating glazings with an integrated holder or guide for a built-in element. Since the groove is formed by two adjoining hollow chambers, the heat conduction is interrupted by the edge bond from outside to inside (thermal separation). As a result, the heat insulation of the edge bond of a glazing is improved. Preferably, the hollow chambers are empty. This maximizes thermal insulation. Thanks to the design with a T rockenmittelkammer over the entire width of the spacer, the filling of the spacer is simplified with desiccant compared to a spacer with two individual hollow chambers. The size of the desiccant chamber can be adjusted independently of the dimensioning of the groove to the required filling volume for the corresponding insulating glazing. Conversely, the depth of the groove can be freely adjusted according to the application without taking into account a sufficient filling volume for the desiccant, as this is ensured by the desiccant chamber. The groove can have various shapes and is adapted by the skilled person to the intended installation element. For example, the groove may be trapezoidal, rectangular, oval, spherical or angled. Also combinations of the geometries are possible.

In a preferred embodiment, the polymeric base body has a width b of 8 mm to 54 mm, preferably 14 mm to 32 mm. Particularly preferably, the polymeric base body has a width of 16 mm to 22 mm. These dimensions result in a slim insulating glazing with the possibility of installation, such as a blind. In combination with a slim insulating glazing, the spacer according to the invention is particularly advantageous. The desiccant chamber can be adjusted in height so that the desired amount of desiccant can be filled. Regardless of the depth of the groove and thus the height of the two hollow chambers can be chosen so that the desired mounting element can be fixed there. At very Narrow hollow chambers, which are narrower than 4 mm, for example, occur problems in the filling with desiccant, as by electrostatic charging of the polymer body, the filling is difficult / impossible. For an efficient filling process, a design according to the prior art is not suitable for narrow insulating glazings. The width is the shortest distance between the two wafer contact walls (see FIG. 1). The width of the two hollow chambers may be the same, resulting in symmetrical glazing. Alternatively, an asymmetrical design with hollow chambers of different width is possible.

Preferably, the height h of the two hollow chambers corresponds at most to the filling level f of the desiccant chamber. The height of the hollow chambers is not necessary for a filling with desiccant. Therefore, a lower height is preferred for non-visibility in the finished insulating glazing. Particularly preferably, the height of the hollow chambers is at most 0.75 f.

Preferably, the filling level f of the desiccant chamber is between 4 mm and 10 mm, preferably between 5 mm and 6 mm. These heights are suitable to allow easy filling and to provide sufficient volume for the desiccant.

The height h of the two hollow chambers is preferably between 1 mm and 10 mm, preferably between 2 mm and 5 mm. These heights lead to a sufficient depth of the groove, so that a mounting of mounting elements is stable and at the same time provide hollow chambers that improve the thermal insulation due to thermal separation.

In a further preferred embodiment, the polymeric base body has a wall thickness d between 0.3 mm and 2 mm. With these wall thicknesses a stable attachment of a blind is guaranteed and the secure attachment of two outer panes in an insulating glazing. Particularly preferably, the wall thickness d is between 0.5 mm and 1 mm. With this wall thickness is given a high stability while reducing the cost of materials. Preferably, the wall thickness d of the polymeric body is the same everywhere. This is advantageous for the stability of the spacer. It is alternatively also possible to change the wall thickness in individual areas. For example, the wall thickness of the groove can be varied to accommodate flexibility. This can be easily adjusted depending on the application. Alternatively, the wall thickness of the intermediate wall can be increased in the region of the groove in order to increase the stability in this area. In a preferred embodiment of the spacer according to the invention, the desiccant chamber is filled with a desiccant. This allows the absorption of moisture from the inner space between the panes of the insulating glazing. Particularly preferably, the hollow chambers contain no desiccant. The hollow chambers serve to improve the heat-insulating properties of the spacer. In addition, this design leads to a reduction in material costs compared to a filled version. In an alternative embodiment, one or both hollow chambers may also contain drying agents. This increases the absorption capacity of moisture.

In a further preferred embodiment, at least the first hollow chamber is connected to the desiccant chamber so that a gas exchange between the first hollow chamber and the desiccant chamber can take place. This can be done through openings or a porous version of the partition wall in this area. In addition, at least the first interior wall contains one or more openings through which moisture from the inner space between the panes can penetrate into the first hollow chamber and can be absorbed from there into the desiccant chamber. This ensures that an efficient absorption of moisture by desiccant can take place in the desiccant chamber.

In a further preferred embodiment, both hollow chambers are connected to the desiccant chamber so that a gas exchange between the two hollow chambers and the desiccant chamber can take place. In addition, openings are included in both interior walls. This improves the absorption of moisture. In combination of two completely separate disc spaces, for example with a disc, this embodiment is particularly preferable.

In a further preferred embodiment, openings are contained in the intermediate wall in the region of the bottom surface of the groove, so that a gas exchange between the inner pane intermediate space and the desiccant chamber can take place. This embodiment is particularly easy to manufacture. A combination with additional openings in the interior walls and in the intermediate wall in the region of the hollow chambers is also possible.

In a further preferred embodiment, no opening for the gas exchange is installed and the absorption of moisture via the non-gas-tight plastic of the polymeric body. Since plastic is not completely gas-tight, the omission of openings is also possible. In a preferred embodiment, the polymeric base body is made in one piece. This increases the stability of the spacer and simplifies the manufacturing process. Preferably, the polymeric base body is extruded.

In a preferred embodiment, a gas and vapor-tight barrier is arranged on the outer wall and at least a part of the wafer contact walls. The gas- and vapor-proof barrier increases the gas and moisture diffusion tightness of the spacer and thus improves the sealing of the insulating glass unit against the loss of any existing gas filling and against the ingress of moisture into the inner space between the panes. Suitable barriers are known in the art. In particular, metallic films and polymeric films with metallic coatings are suitable, as disclosed, for example, in WO2013 / 104507 or WO2016 / 046081.

In a preferred embodiment, the gas and vapor-tight barrier is designed as a barrier film. The barrier film is preferably a multilayer film which contains at least one polymeric layer and at least one ceramic layer and / or one metallic layer.

The barrier film preferably contains at least one polymeric layer, which is coated on both sides with a respective metallic or ceramic layer, so that a layer sequence of metal-polymer-metallic, ceramic-ceramic-ceramic or ceramic-polymer-metallic results. Such a polymer layer coated on both sides is preferably glued to further arbitrary layers.

Such a film coated on both sides is preferably adhesively bonded to at least one further polymeric film coated on one or both sides. Thus, a multilayer barrier film can be easily produced which contains a plurality of metallic and / or ceramic layers. The metallic and ceramic layers increase gas diffusion density and moisture diffusion density. A combination of several metallic and / or ceramic layers can advantageously improve the tightness, since defects in one layer can be compensated by another layer.

The metallic layers preferably contain aluminum, silver, magnesium, indium, tin, copper, gold, chromium, nickel and / or alloys or oxides thereof. The metallic one Layers are preferably applied in a thin-film vacuum method and each have a thickness of 10 nm to 800 nm, more preferably 20 nm to 50 nm.

The ceramic layers preferably contain silicon oxides (SiO _x ) and / or silicon nitrides. The ceramic layers preferably have a thickness of 10 nm to 800 nm, more preferably 20 nm to 50 nm. Layers of this thickness improve the gas diffusion density and moisture diffusion density.

The polymeric layers of the barrier film preferably comprise polyethylene terephthalate, ethylene vinyl alcohol, polyvinylidene chloride, polyamides, polyethylene, polypropylene, silicones, acrylonitriles, polyacrylates, polymethyl acrylates and / or copolymers or mixtures thereof.

A polymeric layer is preferably designed as a single-layered film. This is advantageous cost. In an alternative preferred embodiment, the polymeric layer is designed as a multilayer film. In that case several layers of the materials listed above are glued together. This is advantageous because the material properties can be perfectly matched to the sealants, adhesives or adjacent layers used.

The polymeric layers preferably each have a layer thickness of 5 pm to 80 pm.

In an alternative preferred embodiment, the gas and vapor-tight barrier is designed as a barrier coating. This barrier coating contains aluminum, aluminum oxides and / or silicon oxides and is preferably applied via a PVD (physical vapor deposition) method. The barrier coating containing aluminum, aluminum oxides and / or silicon oxides provides particularly good results in terms of tightness and additionally exhibits excellent adhesion properties to the secondary sealants used in the insulating glass unit when used as the outer layer.

In a preferred embodiment, the polymeric body contains biocomposites, polyethylene (PE), polycarbonate (PC), polypropylene (PP), polystyrene, polybutadiene, polynitriles, polyesters, polyurethanes, polymethyl methacrylates, polyacrylates, polyamides, polyethylene terephthalate (PET), polyethylene terephthalate glycol (PETG ), Polybutylene terephthalate (PBT), acrylonitrile-butadiene-styrene (ABS), acrylic ester-styrene-acrylonitrile (ASA), acrylonitrile-butadiene-styrene / polycarbonate (ABS / PC), styrene-acrylonitrile (SAN), PET / PC, PBT / PC or copolymers or mixtures thereof. Preferably, the polymeric base body contains at least one filler, such as fibers, spheres or hollow spheres of different materials. For example, reinforcing fibers of glass, carbon, aramid, polyethylene, basalt or ceramic materials and natural fibers (eg, cellulose, cotton, hemp, sisal) are suitable. Glass bubbles are particularly suitable as a filler.

The main body is preferably glass fiber reinforced. By choosing the glass fiber content in the body, the thermal expansion coefficient of the body can be varied and adjusted. By adjusting the coefficient of thermal expansion of the base body and the insulating film, temperature-induced stresses between the different materials and a flaking off of the insulating film can be avoided. The main body preferably has a glass fiber content of 20% to 50%, particularly preferably from 30% to 40%. The glass fiber content in the base body simultaneously improves the strength and stability.

The spacer preferably contains a drying agent, preferably silica gels, molecular sieves, CaCh, Na ₂ S0 ₄ , activated carbon, silicates, bentonites, zeolites and / or mixtures thereof. The desiccant is preferably contained in the desiccant compartment. The desiccant can then be filled directly before the assembly of the glazing. This ensures a particularly high absorption capacity of the desiccant in the finished insulating glazing.

In a preferred embodiment of the spacer according to the invention, two shading strips are arranged on the left and right of the groove so that they protrude from the first inner surface and the second inner surface into the inner space between the panes. The shading strips run parallel to the disc contact surfaces. The shading strips prevent incident light in a closed blackout unit in the insulating glazing through a gap between the blackout unit and spacer. The shading strips are preferably arranged at the connection points between the first inner surface and the first side flank of the groove and between the second inner surface and the second side flank of the groove. This way, a potential gap can be closed very tightly. The shading strips preferably protrude 0.5 mm to 10 mm into the inner space between the panes. The length can be adapted to the existing gap. The shading strips are preferably of the same material as the polymeric body. Preferably, the shading strips are made in one piece with the polymeric base body, preferably extruded. This improves the stability of the spacer.

Alternatively preferably, the shading strips are made of a flexible material. This can adapt to the shape of the blind and thus close a gap well. In addition, a flexible shading strip can be used for gaps of different sizes, since the material can adapt somewhat. Preferably, the flexible material is co-extruded with the polymeric body. This simplifies the manufacture and improves the stability of the spacer.

The invention further comprises an insulating glazing comprising at least two panes, a circumferential spacer frame disposed between the panes, a primary sealing means and a secondary sealing means. The spacer frame contains at least along two opposite sides of a spacer according to the invention with a groove. The spacer frame is tightly connected to the first disc and the second disc via a primary sealant. In this case, the first disc bears on the first disc contact wall of the spacer and the second disc on the second disc contact wall. Between the first disc and the first

Disk contact wall and the second disc and the second disc contact wall is mounted a primary sealant. The two discs protrude over the

Spacer frame addition, so that a circumferential outer pane space is formed, which is expired with a secondary sealant, preferably a plastic sealing compound. The outer space between the panes faces the inner space between the panes and is limited by the two panes and spacers. The secondary sealant is in contact with the spacer according to the invention. The insulating glazing invention offers thanks to the attachment of the spacer according to the invention on at least two opposite sides the possibility for the installation of various installation elements.

Preferably, a darkening unit is arranged in the inner space between the panes.

The darkening unit comprises two guide elements and these guide elements are each inserted into a groove of the spacer according to the invention. If the spacer according to the invention is arranged along the vertical sides of an insulating glazing, a blind can be guided from top to bottom via the guide elements in the groove. The insulating glazing invention with blind has a special simple construction and can be easily broken down. An advantage of the arrangement of the darkening unit in the inner space between the panes of an insulating glazing is that it is arranged protected there. It does not dirty. In addition, their mechanical susceptibility is low. An advantage of insulating glazing with an intermediate window blind compared to eg insulating glass with surface vaporization is that in a glazing with arranged in the inner space cavity obfuscation a light transmittance and total solar energy transmission in a variable manner at any time the changing conditions can be optimally adjusted and also an additional variable privacy is given , Thanks to the guidance of the blackout unit in the guide rails, it is prevented that the blackout unit can be vibrated and hit against the windows. This prevents the damage of coatings on the discs in the inner space between the panes. Thanks to the spacer according to the invention with a relatively low installation height, the glazing is also optically advantageous, since the spacer can be mounted so that it protrudes only slightly from the window frame.

The blackout unit is preferably a venetian blind, a Venetian blind with individual fixed, rotatable or movable slats, a roller blind or an external blind with collapsible slats.

Preferably, the blackout unit is designed to be electrically or mechanically operable. In a preferred embodiment, the blind is connected to a magnetic coupling and operable. As a result, a mechanical actuation of the blind is made possible by magnetic transmission. An advantage of this is that no cable is needed, which must be passed through the spacer.

In an alternative preferred embodiment, the blind is connected to an electric motor and operable. For electrical actuation, the electric motor is preferably installed in the inner space between the panes, and a cable is guided through the spacer into the outer space between the panes. Alternatively, however, the electric motor can also be arranged in the outer space between the panes, and a cable can be guided through the spacer into the inner space between the panes.

In a preferred embodiment, the spacer frame includes a pressure compensation element which provides pressure equalization between the external environment and the internal space between the panes. In particular, in the case of insulating glazing with blinds, it can otherwise lead to a "bulging" of the panes in the case of large differences in pressure come, so pinch the blind. Suitable pressure compensation elements are known, for example from WO2014 / 095097.

In a further preferred embodiment, the spacer frame circumferentially from a spacer according to the invention and in the groove of the spacer, a middle disc is inserted. Thanks to the spacer according to the invention, narrow insulating glazings can be realized. The middle disc may be made of the same materials as the outer discs.

The secondary sealant preferably contains polymers or silane-modified polymers, more preferably polysulfides, silicones, RTV (room temperature curing) -

Silicone rubber, HTV (Hochtemperturvernetzetzenden) silicone rubber, peroxidischvernetzten silicone rubber and / or addition-crosslinked silicone rubber, polyurethanes, butyl rubber and / or polyacrylates.

The primary sealant preferably contains a butyl, more preferably a polyisobutylene. The polyisobutylene may be a crosslinking or non-crosslinking polyisobutylene.

The discs contain materials such as glass and / or transparent polymers. The panes preferably contain glass and / or polymers, preferably flat glass, float glass, quartz glass, borosilicate glass, soda-lime glass, polycarbonate, polymethyl methacrylate and / or mixtures thereof. The first pane and / or the second pane may also be formed as a laminated glass pane. The discs preferably have an optical transparency of> 85%. In principle, different geometries of the disks are possible, for example rectangular, trapezoidal and rounded geometries.

The discs preferably have a heat-resistant coating. The thermal barrier coating preferably contains silver.

In order to be able to exploit energy saving options, the insulating glazing can be filled with a noble gas, preferably argon or krypton, which reduce the heat transfer value in the insulating glazing gap.

Another aspect of the invention is a method for producing an insulating glazing according to the invention wherein at least - A spacer frame is assembled with a spacer according to the invention along at least two opposite sides, wherein in the groove of the spacer according to the invention, a mounting element is used,

- The composite spacer frame is connected to the first disc and the second disc, so that an inner space between the panes and open to the outside environment outer space between panes arise and

- The arrangement is pressed.

The composite spacer frame with inserted mounting element can then be processed on a conventional double glazing installation known to the person skilled in the art. The installation element can be both a darkening unit and a middle pane. In a preferred embodiment of the method, a rectangle open from one side is preformed from spacers. In this case, for example, three spacers can be provided with a fermentation section and linked at the corners by corner connectors. Instead, the spacers can also be welded directly to each other, for example by means of ultrasonic welding. In the U-shaped part of the spacer frame, starting from the open side of the arrangement, the installation element, that is, for example, a blind or a third pane, is inserted into the groove of the spacer according to the invention. The remaining open edge of the third disc is then also closed with a spacer. Optionally, further elements, such as a drive unit for a blind can be inserted.

The first and second disks are preferably connected to the spacer frame with a primary sealant and the outer disk spaces are forfeited with a secondary sealant.

Preferably, the inner disk space between the first disk and second disk is filled with a protective gas prior to pressing the disk assembly.

The invention further includes the use of insulating glazing as building interior glazing, building exterior glazing or facade glazing.

In the following the invention will be explained in more detail with reference to drawings. The drawing is a purely schematic representation and not to scale. It does not limit the invention in any way. The drawing shows in: 1 shows a cross section of a spacer according to the invention,

FIG. 2 shows a cross section of a spacer according to the invention,

Figure 3 shows a cross section through the edge region of an inventive

Double glazing and

4 shows a cross section of a spacer frame with darkening unit.

Figure 1 shows a cross section of a spacer according to the invention I. The polymeric base body 1 comprises two parallel disc contact walls 2.1 and 2.2, which produce the contact with the panes of insulating glazing. The disc contact walls

2.1 and 2.2 are connected via an outer wall 1 1. The outer wall 11 extends substantially parallel to two interior walls 3.1 and 3.2. At the transition to the disk contact walls 2.1 and 2.2 are preferably two angled connecting walls

1 1.1 and 1 1.2 arranged. The connecting walls 1 1.1, 1 1.2 preferably extend at an angle a (Alfa) of 30 ° to 60 ° to the outer wall 1 1. The polymeric base body 1 preferably contains styrene-acrylonitrile (SAN) and about 35 wt .-% glass fiber. The angled shape of the first connection surface 1 1.1 and the second connection surface 1 1.2 improves the stability of the glass fiber reinforced polymeric base body 1 and allows, as shown in Figure 3, a better bonding and insulation of the spacer according to the invention. The main body 1 has a desiccant chamber 10 which, from the disk contact walls 2.1, 2.2, the outer wall 11 and the connecting walls 1 1.1,

1 1.2 and a parallel to the outer wall 1 1 extending intermediate wall 4 is formed. Adjacent to the intermediate wall 4 on the side facing away from the outer wall 11, two hollow chambers 5.1 and 5.2 are arranged. Between the hollow chambers 5.1 and 5.2 parallel to the wafer contact walls 2.1 and 2.2, a groove 6. The groove 6 is bounded by two side edges 7.1, 7.2 and the intermediate wall 4. The side edges 7.1 and 7.2 of the groove 6 at the same time form the side walls of the hollow chambers 5.1 and 5.2. The hollow chambers 5.1 and 5.2 are completed in the finished double glazing to the inner pane space through the first interior wall 3.1 and the second interior wall 3.2. The wall thickness d of the polymeric base body 1 is 1 mm. The width b of the polymeric base body 1 is the distance between the two wafer contact walls 2.1, 2.2. The width b determines the distance between the two outer panes in the finished glazing. The width b is 16 mm and is therefore a very narrow spacer for insulating glazing with built-in element. The height h of the first hollow chamber 5.1 and the second hollow chamber 5.2 is 3.5 mm and the filling level f of the desiccant chamber 10 is 5.5 mm. The total height of the polymeric base body 1 is thus 12 mm. In these 12 mm already the guide rail for a blackout unit is included thus space saving in the edge bond of a glazing can be installed without disturbing the overall visual impression sustainable. In the first interior wall 3.1 and the second interior wall 3.2 each openings 8 are included. In addition, openings 4 are respectively contained in the intermediate wall 4, which connects the desiccant chamber 10 with the first hollow chamber 5.1 and the second hollow chamber 5.2. So moisture from the inner space between the panes in the glazing can pass through the hollow chambers into the desiccant chamber, where the moisture is absorbed by the desiccant.

FIG. 2 shows a further embodiment of a spacer according to the invention I. In essence, the spacer is identical to that in FIG. The first hollow chamber 5.1 and the second hollow chamber 5.2 are lower, i. the height h of the hollow chambers is only 2 mm, while the filling level f of the desiccant chamber 10 remains at 5.5 mm. In the interior walls 3.1 and 3.2 no openings are included. Also, the intermediate wall 4 in the region of the first and second hollow chamber 5.1 and 5.2 contains no openings. Instead, 6 openings 8 are included in the intermediate wall 4 in the region of the groove. In this way, the inner space between the panes of an insulating glazing can be connected to the desiccant chamber 10 so that a moisture absorption by the desiccant 9 in the desiccant chamber is possible. In addition, a shading strip 24 is respectively attached to the first interior surface 3.1 and the second interior surface 3.2 at the connection points to the first and second side flanks of the groove 7.1 and 7.2. These shading strips 24 run parallel to the disk contact walls 2.1 and 2.2. The shading strips 24 protrude 2 mm into the inner space between the panes and close any gap between a venetian blind and the spacer. In order to prevent the incidence of light in the insulating glazing through a gap between the blind and the spacer, a shading strip runs there. The shading strips 24 are made of the same material as the spacer.

3 shows a cross-section of the insulating glazing II according to the invention in the edge region with the spacer I substantially as described in FIG. 1. In addition, a barrier film 12 is arranged on the outer wall 11 and a part of the pane contact walls 2.1, 2.2. The barrier film 12 consists of two 12 pm thick PET films, which are coated on both sides with a 30 nm thick aluminum layer. The barrier film 12 is attached via a polyurethane hot melt adhesive. The polyurethane hot melt adhesive is a non-gaseous adhesive to prevent gases from diffusing into the interior space of the pan 19 and from forming visible there Rainfall is coming. In the desiccant chamber 10 is filled as a desiccant 9, a molecular sieve. The first and the second hollow chamber 5.1, 5.2 are empty. Between a first disc 15 and a second disc 16 of the glass fiber reinforced polymer body 1 is arranged with the barrier film 12 mounted thereon. The first disk 15, the second disk 16 and the spacer I define the outer pane space 20 of the insulating glazing. In the outer space between the panes 20, a polysulfide is arranged as a secondary sealing means 17. Between the disc contact walls 2.1, 2.2 and the discs 15, 16, a primary sealing means 18 is arranged. This contains butyl. The primary sealant 18 overlaps the insulation sheet to prevent potential interfacial diffusion. The first disk 15 and the second disk 16 are made of 6 mm thick soda-lime glass. In the inner space between the panes 19 a Venetian blind 22 is arranged, which is inserted via two guide elements 21 in a respective groove 6 of the spacer I. The blind 22 can now be guided in the groove 6, which prevents it from coming into contact with the two discs 15, 16. The insulating glazing can thus be installed not only vertically, but also at an angle, as is the case for example with skylights.

FIG. 4 shows a spacer frame, as it is installed in an insulating glazing II according to the invention. Along the right and left sides of the frame in the figure, an inventive spacer with groove 6 is arranged in each case. Along the upper and lower sides in the figure, an ordinary spacer without the hollow chambers 5.1 and 5.2 is arranged in each case. The spacers are connected in the corners by corner connectors 14, the Einsteckschenkel each engage in the desiccant chambers. At the upper spacer a shutter housing 23 is mounted, in which the shutter 22 and drive unit are hidden. The shutter guide elements 21 are inserted into the groove 6 of the spacer I according to the invention and ensure safe guidance of the blind. LIST OF REFERENCE NUMBERS

I spacers

II insulating glazing

I polymeric base body

2.1 first disk contact wall

2.2 second disc contact wall

3 glazing interior wall

3.1 first interior wall

3.2 second interior wall

4 intermediate wall

5.1 first hollow chamber

5.2 second hollow chamber

6 groove

7.1 first side wall of the groove; first side flank

7.2 second side wall of the groove; second side flank

8 opening

9 desiccant

10 desiccant chamber

I I outer wall

1 1.1, 1 1.2 Connecting walls

12 gas and vapor barrier

13 spacer frame

14 corner connectors

15 first disc

16 second disc

17 secondary sealant

18 primary sealant

19 inner pane space

20 outer pane space

21 Venetian blind guide element

22 Blackout unit, Venetian blind, built-in element

23 Shutter housing / box

24 shading strips

b Width of the polymer body d Wall thickness of the polymer body h Height of the hollow chambers

f level of the T rockenmittelkammer

Claims

claims

1. Spacer (I) for multiple-pane insulating glazing, comprising at least a polymeric base body (1) comprising a first disc contact wall (2.1), a parallel thereto second disc contact wall (2.2) and an outer wall (1 1), the two disc contact walls (2.1 , 2.2) connects; a glazing interior wall (3) extending parallel to the outer wall (11) and connecting the pane contact walls (2.1, 2.2);

- Between the glazing interior wall (3) and the outer wall (1 1) parallel to the outer wall (11) extending intermediate wall (4) which includes a desiccant chamber (10) with the outer wall (11) and the disc contact walls (2.1, 2.2)

the glazing interior wall (3) is divided by a groove (6) into a first interior wall (3.1) and a second interior wall (3.2),

- The groove (6) is arranged parallel to the disc contact walls (2.1, 2.2) and by a first side edge (7.1), a second side edge (7.2) and the intermediate wall (4) is limited and

- A first hollow chamber (5.1) of the first interior wall (3.1), the first

Disk contact wall (2.1), the first side edge (7.1) and the intermediate wall (4) is surrounded and a second hollow chamber (5.2) of the second inner wall (3.2), the second disc contact wall (2.2), the second side edge (7.2) and the intermediate wall (4) is surrounded.

2. Spacer (I) for multiple-pane insulating glazings according to claim 1, wherein the width b of the polymeric base body (1) of 8 mm to 54 mm, preferably from 14 mm to 32 mm, particularly preferably 16 mm to 22 mm.

3. Spacer (I) for multiple-pane insulating glazings according to one of the preceding claims, wherein the height h of the two hollow chambers (5.1, 5.2) at most the filling height f of the desiccant chamber (10) corresponds, preferably at most 0.75xf corresponds.

4. Spacer (I) for multiple-pane insulating glazes according to one of the preceding claims, wherein the filling height f of the desiccant chamber (10) is between 4 mm and 10 mm, preferably between 5 mm and 6 mm.

5. Spacer (I) for multiple-pane insulating glazings according to one of the preceding claims, wherein the height h of the two hollow chambers (5.1, 5.2) is between 1 mm and 10 mm, preferably between 2 mm and 5 mm.

6. Spacer (I) for multiple-pane insulating glazings according to one of the preceding claims, wherein the wall thickness d of the polymeric base body (1) is between 0.3 mm and 2 mm, preferably between 0.5 mm and 1 mm.

7. Spacer (I) according to one of the preceding claims, wherein the

Desiccant chamber (10) is filled with a desiccant and the first hollow chamber (3.1) and the second hollow chamber (3.2) contain no desiccant.

8. spacer (I) for multiple-pane insulating glazings according to one of the preceding claims, wherein at least the first interior wall (3.1) includes a plurality of openings (8) and the adjacent first hollow chamber (5.1) with the desiccant chamber (10) is connected to that Gas exchange between the first hollow chamber (5.1) and desiccant chamber (10) can take place.

9. Spacer (I) according to one of the preceding claims, wherein in the

Partial wall (4) in the region of the groove a plurality of openings (8) are included.

10. Spacer (I) according to any one of the preceding claims, wherein the polymeric base body (1) is made in one piece.

1 1. A spacer (I) according to any one of the preceding claims, wherein on the outer wall (1 1) and at least a portion of the wafer contact walls (2.1, 2.2) a gas and vapor-tight barrier (12) is arranged.

12. insulating glazing (II) comprising at least a first disc (15), a second disc (16) and a between the discs (15,16) arranged circumferential spacer frame (13), wherein

- The spacer frame (13) at least along two opposite sides of a spacer (I) according to any one of claims 1 to 11 contains,

- The spacer frame (13) via a primary sealing means (18) is tightly connected to the first disc (15) and the second disc (16) and - The outer disc space (20) between the first disc (15), the second disc (16) and the spacer frame (13) with a secondary sealing means (17) is filled.

Insulating glazing (II) according to claim 12, wherein

in the inner space between the panes (19) a darkening unit (22) is arranged,

- The blackout unit (22) comprises two guide elements (21) and

- The guide elements (21) are each inserted into a groove (6) of a spacer (I) according to claims 1 to 11.

14. Insulating glazing according to claim 12, wherein

- The spacer frame (13) circumferentially from the spacer (I) according to claims 1 to 1 1 and

- In the groove (6) of the spacer (I), a middle disc is inserted.

15. Use of an insulating glazing (II) according to claims 12 to 14 as building glazing.