EP4222332B1 - Multi-pane insulated glass and method for producing same - Google Patents

Description

Multi-pane insulating glass usually consists of two or more float glass panes, occasionally rolled glass or other flat glass or glass substitute products, which are bonded to a primary seal applied to the contact surfaces using a spacer, usually made of metal, plastic or composite material. The spacer maintains a defined distance from the edge of the glass, which forms the space for the secondary seal, which is intended to ensure a long-term, gas-diffusion-tight seal of the space between the panes. In order to achieve a higher thermal insulation value, the space between the panes is usually filled with a noble gas mixture.

In addition, at least one of the panes usually has a coating on the side facing the space between the panes. In the context of the invention, the term "pane" also includes a pane on which a coating is provided in particular on the side facing the space between the panes.

The problem of primary seals penetrating into the space between the panes due to climatic loads and thermal stress can currently be overcome by more precise positioning and more defined pressing as well as higher material compatibility of the components or special shapes of metallic spacers.

EN 10 2004 027 527 A1 discloses a method for producing an insulating glass pane in which two glass panes are firmly bonded and sealed together by means of at least one sealing compound with the interposition of a frame-shaped spacer. Two different sealing compounds are used here.

EP 2 420 536 A1 discloses an edge seal for the production of double or multi-pane insulating glass or solar modules. A primary sealant and a secondary sealant are provided.

US 2011/027606 A1 discloses a method for producing a corner of a frame-like spacer for insulating glass panels.

WO 2015/086457 A2 discloses an insulating glazing with improved sealing, wherein a primary sealant and a secondary sealant are provided. A bore is also provided in the spacer, which enables gas exchange between a glazing interior and a hollow chamber in order to allow air humidity in the glazing interior to be absorbed by the desiccant.

It is an object of the present invention to provide a multi-pane insulating glass unit by means of which it is possible to reliably prevent a primary sealant from passing over or entering the space between the panes.

The use of an elastic seal in a multi-pane insulating glass unit is specified, wherein the multi-pane insulating glass unit has at least two panes and an edge seal comprising a circumferential spacer which is arranged between the two panes and separates a space between the panes from an outer space between the panes, wherein a primary sealant is provided between the spacer and the panes, wherein the elastic seal acts as a barrier to the spread of the primary sealant into the space between the panes.

The object is achieved by a multi-pane insulating glass, comprising at least two panes between which an edge seal is introduced, the edge seal having a circumferential spacer, the edge seal separating a space between the panes from an outer pane, a primary sealant being provided between the circumferential spacer and the panes, which seals the space between the panes from the outer pane, which is further developed in that an elastic seal is provided which, viewed from the space between the panes, is arranged in front of the primary sealant and provides a seal between the spacer and a pane, the spacer providing a compensation space for a primary sealant flowing in the direction of the elastic seal, the compensation space comprising at least one passage opening into a cavity of the spacer.

In addition, a passage opening is provided through which the primary sealant can pass into a cavity in the spacer. Common spacers have, for example, a profile made of metal or another material with a cavity in which a desiccant is introduced. In addition, the The profile or spacer is usually perforated towards the space between the panes so that the cavity and the space between the panes communicate with each other. The desiccant, such as silica gel, then keeps the volume of the space between the panes dry.

According to one embodiment of the invention, this cavity also serves to accommodate primary sealant if the primary sealant expands, for example due to an increase in temperature.

In the context of the invention, the elastic seal can also be referred to as a sealing lip, locking seal or locking lip. By providing the elastic seal, the primary sealant is effectively prevented from expanding into the space between the panes. Since the elastic seal represents a barrier to the expansion of the primary sealant into the space between the panes, the primary sealant will expand in a different direction.

The spacer is circumferential, in particular designed such that it follows the contour of the pane edge or runs essentially parallel to the pane edge, preferably with a distance of, for example, 5 mm to 20 mm.

According to the invention, the spacer has a compensation space for a primary sealant flowing in the direction of the elastic seal.

Preferably, the primary sealant is a plastic sealant, in particular polyisobutylene.

Preferably, the elastic seal is applied to the spacer in a flowable state and after curing the seal of the spacer is placed between the panes. For example, a still flowable silicone can be applied to the spacer so that it is also applied all the way around the spacer and is initially hardened until the flowable state has ended, so that only when the seal is in the state in which it is elastic can a corresponding pressure be generated by connecting the multi-pane insulating glass.

Alternatively, the elastic seal can preferably be connected to the spacer as a cord, in particular a round cord or a cord with a square cross-section. For example, a circumferential cord, i.e. an endless cord, can be applied to the spacer on a side that is intended for connection to a pane, for example clamped or glued into a groove. An elastic seal in the form of a cord is also applied or clamped into the opposite side of the spacer in order to enable faster assembly of the multi-pane insulating glass. Alternatively, an elastic cord can also be connected at its ends to create an overall circumferential endless cord. An elastic seal is also applied to the spacer there in order to enable a connection to the opposite pane.

Preferably, the elastic seal is silicone, polyurethane or polysulphide. Alternatively, the elastic seal can also be a vulcanizate of natural rubber or silicone rubber

Preferably, a secondary sealant is provided around the outside of the spacer and between the panes. The secondary sealant is therefore placed in the outer space of the pane.

Preferably, a secondary sealant is provided in the outer space of the pane, all the way around the spacer. The secondary sealant is placed on the outside of the spacer in a groove defined by the panes and the spacer. The secondary sealant serves to further seal the multi-pane insulating glass. In addition, the secondary sealant preferably also serves to stabilize the multi-pane insulating glass.

The primary sealant is preferably polyisobutylene, also called isobutylene or butyl for short.

Preferably, the elastic seal is silicone, polyurethane, polysulfide or a vulcanizate of natural rubber or silicone rubber.

Preferably, the elastic seal is designed to be applied to the spacer in a flowable state and to be connected to the panes after the elastic seal has hardened.

Alternatively, the elastic seal is preferably designed to be connected to the spacer (14) as a cord.

If a groove is provided in the spacer to accommodate the elastic seal, it is preferably ensured that the elastic seal does not shift from its position even if the primary sealant expands in such a way that it presses against the elastic seal.

Preferably, the elastic seal is an extrudate.

The secondary sealant comprises or is in particular polyurethane, silicone or a polysulfide.

• Bereitstellen eines umlaufenden Abstandhalters,
• Aufbringen jeweils einer elastischen Dichtung auf zwei gegenüberliegenden Seiten des Abstandhalters,
• Aufbringen jeweils eines plastischen Primärdichtstoffes neben der elastischen Dichtung auf den gegenüberliegenden Seiten des Abstandhalters, wobei der plastische Primärdichtstoff weiter außen im Vergleich zu der elastischen Dichtung aufgebracht wird,
• Verbinden des mit dem plastischen Primärdichtstoff und der elastischen Dichtung versehenen Abstandhalters mit jeweils einer Scheibe, auf den zwei gegenüberliegenden Seiten des Abstandhalters und
• Befüllen eines Scheibenaußenraums der Scheiben mit einem Sekundärdichtstoff.

Furthermore, a method for producing a multi-pane insulating glass unit is provided, comprising the following method steps:

• Providing a circumferential spacer,
• Applying an elastic seal to two opposite sides of the spacer,
• Applying a plastic primary sealant next to the elastic seal on the opposite sides of the spacer, whereby the plastic primary sealant is applied further out than the elastic seal,
• Connecting the spacer provided with the plastic primary sealant and the elastic seal with a disc each on the two opposite sides of the spacer and
• Filling the outer space of the panes with a secondary sealant.

Within the scope of the invention, the outer space of the pane can also be referred to as the outer joint between the two panes and the spacer.

Preferably, a space between the panes, which is enclosed and defined by the two panes and the spacer, is filled with filled or filled with a noble gas or a mixture of noble gases.

Preferably, the elastic seal represents a limitation of the spread of the primary sealant into the space between the panes.

One embodiment provides an insulating glass pane with at least two panes, for example glass panes, between which in the edge region there is a spacer profile, which can be referred to as a spacer in the context of the invention, with at least two permanently elastic, non-permanently plastic seals placed on the spacer or partially in the spacer. At least one elastic seal is arranged on the side of the spacer which borders on a pane.

The elastic seals fulfill the task of preventing the primary seal used in the edge connection of the insulating glazing unit or the multi-pane insulating glass, which is intended to ensure the gas-tightness of the space between the panes, from leaving its intended area of effect or the application location. In order to prevent the primary seal from entering the space between the panes, one embodiment proposes to provide a three-stage sealing structure consisting of an elastic seal, which can also be referred to as a primary sealing barrier or primary sealing seal, primary seal and secondary seal, instead of a two-stage sealing structure consisting of a primary seal and a secondary seal.

Usually, an insulating glazing unit or a multi-pane insulating glass unit comprises at least two panes arranged parallel to each other, which are separated by a metal spacer, Plastic or a composite material. The spacers are usually largely rectangular hollow bodies that are filled with a desiccant to prevent condensation in the space between the panes and have a perforation on the side facing the space between the panes. The spacers are assembled into closed frames by bending or plugging together with plastic or metal connectors in the corners and their shape follows the geometry of the glass panes or panes with a certain offset towards the center of the pane.

A primary seal, usually polyisobutylene, which is liquefied by heating, is sprayed onto the sides of the spacer facing the glass surface. The spacers prepared in this way are then pressed together with the glass panes. By providing a predeterminable amount of the primary seal and a predeterminable pressure when bringing the spacer together with the panes, a uniform seal is created that ensures gas tightness and holds the multi-pane insulating glass together until further notice. In order to permanently fix this structure and seal it in the long term, the cavity created by the offset of the frame outwards is filled with the secondary seal and thus bonded over at least three flanks.

The space between the panes created during assembly is filled with a gas mixture, often with a noble gas, to improve the thermal insulation effect. For the same purpose, a coating is usually used on at least one of the glass surfaces or pane surfaces facing the space between the panes.

When the multi-pane insulating glass is installed, the Gas filling expands due to heating or sunlight during the day and contracts again at night. This creates a pumping movement that exerts pressure and mechanical stress on the primary seal. This pressure causes the permanently plastic polyisobutylene, which is usually used, to migrate into the space between the panes. In addition to the aesthetic impairment, this can also lead to premature deterioration of the sealing effect in severe cases. By using a further sealing level according to the invention in the form of an elastic seal in front of the primary seal, as seen from the space between the panes, the migration of the primary seal into the space between the panes is prevented. Movement in the edge bond is compensated for in particular by the flexibility of the elastic seal. The elastic seal is preferably flexible enough to be partially compressed when the multi-pane insulating glass is pressed and to expand again when the gas filling in the space between the panes expands due to thermal factors and the resulting pumping movement of the multi-pane insulating glass.

The elastic seal is preferably not a thermoplastic. If a thermoplastic is used, the thermoplastic should have a temperature resistance where the softening point is greater than or equal to 120°C or greater than or equal to 130°C. In addition, a material that has essentially no or only a slight tendency to outgas under temperature stress should preferably be used as the elastic seal.

Preferably, the material of the elastic seal is extruded into a sealing cord and fixed to the spacer by means of a form fit through gluing or direct application. Preferably, a groove, a recess and/or a web is provided for the mechanical securing of the elastic seal. In the In the context of the invention, a groove is also understood to mean a recess. Alternatively or in addition to a groove, a web can also be used on which the elastic seal can be supported.

Preferably, the expansion of the primary seal is not suppressed, but predetermined. For this purpose, a compensation space is preferably provided, for example a cavity, a bead, a depression or a compensation chamber or chambers of a different design, which are or will be drilled, milled, extruded, blasted, lasered or punched into the spacer. It can also be provided to form a membrane that can expand into a compensation space.

It is further provided that a maximum volume of the primary seal resulting from heating ensures that the elastic seal is not mechanically overloaded or detached by part of the primary seal moving into a compensation space. Preferably, a primary sealant or a primary seal is provided that has high cohesive forces so that tearing off of the primary sealant is prevented. The invention thus ensures that no primary sealant or primary sealing material gets into the space between the panes and thus the elastic seal is not overloaded or damaged.

Thanks to the invention, in particular the compensation space, even an excessive amount of primary sealant applied does not lead to damage to the multi-pane insulating glass, since excessively applied primary sealant can flow into the compensation space without causing damage.

Further features of the invention will become apparent from the description of embodiments of the invention together with the claims and the attached drawings.

Within the scope of the invention, features marked with "in particular" or "preferably" are to be understood as optional features.

Fig. 1

schematisch eine Draufsicht auf ein erfindungsgemäßes Mehrscheiben-Isolierglas,

Fig. 2a

eine schematische Querschnittsdarstellung eines Mehrscheiben-Isolierglases kurz vor dem Zusammensetzen,

Fig. 2b

eine schematische Ausschnittsdarstellung aus Fig. 2a,

Fig. 3a

eine schematische Querschnittsdarstellung eines Mehrscheiben-Isolierglase im zusammengebauten Zustand,

Fig. 3b

eine schematische Ausschnittsdarstellung aus Fig. 3a,

Fig. 4a

eine weitere schematische Querschnittsdarstellung eines Mehrscheiben-Isolierglases und

Fig. 4b

eine schematische Ausschnittsdarstellung aus Fig. 4a.

The invention is described below without limiting the general inventive concept using exemplary embodiments with reference to the drawings, whereby express reference is made to the drawings for all details of the invention not explained in more detail in the text. They show:

Fig.1

schematically a plan view of a multi-pane insulating glass unit according to the invention,

Fig. 2a

a schematic cross-sectional view of a multi-pane insulating glass unit shortly before assembly,

Fig. 2b

a schematic detail of Fig. 2a ,

Fig. 3a

a schematic cross-sectional view of a multi-pane insulating glass unit in the assembled state,

Fig. 3b

a schematic detail of Fig. 3a ,

Fig. 4a

another schematic cross-sectional view of a multi-pane insulating glass unit and

Fig. 4b

a schematic detail of Fig. 4a .

In the drawings, identical or similar elements and/or parts are provided with the same reference numbers, so that a repeated presentation is dispensed with in each case.

Fig.1 shows a schematic plan view of a multi-pane insulating glass 10 according to the invention. An edge bond 13 comprising a spacer 14 is provided, which is provided with a small distance to the edge of the panes and preferably reproduces the contour of the panes all around. The edge bond 13 connects an upper pane 16 and a lower pane 15. For connecting, a Fig.1 A primary sealant 17 (not shown) is provided, which is applied all the way around the spacer and connects or bonds the spacer 14 to the pane 16 at the top. A primary sealant 17 is also applied underneath the spacer 14 and connects the spacer 24 to the pane 15 below.

The frame assembly 13 can also include a secondary sealant introduced into an outer space 12 or a groove formed by the two panes and the spacer 14, which can also be shown in Fig.1 is not shown. The two panes 16 and 15 together with the spacer 14 define a space 11 between the panes. A gas, for example a mixture of noble gases, can be introduced into the space 11 between the panes in order to improve the thermal insulation.

Fig. 2a shows a schematic sectional view of the multi-pane insulating glass 10 before assembly. The spacer 14, which is shown in section on the right side and on the left side of Fig. 2a As shown, a primary sealant 17 is applied to the top and bottom sides of the spacer 14. Towards the interior, ie towards the opposite spacer 14, an elastic seal 19/19' is provided on the respective spacer 14. The elastic seal 19' and the elastic seal 19 are each arranged circumferentially on the spacer 14. The spacer 14 has a cavity 24 into which a desiccant 21 is introduced. A perforation 22 is provided in the spacer 14 to the space between the panes 11 so that a gas connection of the desiccant 21 to the pane interior 11 is possible.

In Fig. 2b is a detail enlargement schematically from Fig. 2a shown. It can be seen there how the primary sealant 17 is applied to one side of the spacer 14. The elastic seal 19 is introduced into a groove 20. A web 21 is also shown there, which can be provided in addition to or as an alternative to the groove 20. The groove 20 and/or the web 25 supports the elastic seal 19. Furthermore, a channel 23 is provided, which enables a connection from the outside of the spacer 14 to the inside in the cavity 24. Both the cavity 24 and the channel 23 serve as a compensation space for the primary sealant 17.

Fig. 3a shows a schematic sectional view of a multi-pane insulating glass 10 assembled according to the invention. In addition to the primary sealant 17 and the elastic seal 19, a secondary sealant 18 is introduced outside around the spacer 14 in the pane outer space 12 or a groove 20 formed by the panes 15 and 16 and the spacer 14 on the outside.

Fig. 3b shows again a schematic detail enlargement from Fig. 3a It can be seen that part of the primary sealant 17 has entered the channel 23.

Fig. 4a essentially shows a corresponding schematic Cross-sectional view of the multi-pane insulating glass 10 according to the invention, in which, as in Fig. 4b , which schematically shows an enlarged detail view, it can be better seen that somewhat more primary sealant 17 has entered the channel 23 and has even passed through the channel 23 and entered the cavity 24.

List of reference symbols

10

Multi-pane insulating glass

11

Space between panes

12

Window exterior

13

Edge bond

14

Spacers

15

Disc

16

Disc

17

Primary sealant

18

Secondary sealant

19

elastic seal

20

Groove

21

Desiccant

22

perforation

23

channel

24

cavity

31

Page

32

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Claims (8)

1. A multi-pane insulated glass (10) comprising at least two panes (15, 16) between which an edge seal (13) is introduced, wherein the edge seal (13) has a peripheral spacer (14), wherein the edge seal (13) separates a pane intermediate space (11) from a pane exterior space (12), wherein a primary sealant (17) is provided between the peripheral spacer (14) and the panes (15, 16) that seals the pane intermediate space (11) from the pane exterior space (12), characterized in that an elastic seal (19) is provided which, viewed from the pane intermediate space (11), is arranged in front of the primary sealant (17) and provides a seal between the spacer (14) and a pane (15, 16), whereas the spacer (14) provides a compensation space (23, 24) for a primary sealant (17) flowing in the direction of the elastic seal (19), whereas the compensation space (23, 24) comprises at least one through-hole (23) into a cavity (24) of the spacer (14).
2. The multi-pane insulated glass (10) according to claim 1, characterized in that a secondary sealant (18) is provided in the pane exterior space (12) peripherally surrounding the spacer (14).
3. The multi-pane insulated glass (10) according to claim 1 or 2, characterized in that the primary sealant (17) is polyisobutylene.
4. The multi-pane insulated glass (10) according to one of claims 1 to 3, characterized in that the elastic seal (19) is silicone, polyurethane, polysulfide or a vulcanizate of natural rubber or silicone rubber.
5. The multi-pane insulated glass (10) according to one of claims 1 to 4, characterized in that the elastic seal (19) is designed to be applied to the spacer (14) when in a flowing state and to be connected to the panes (15, 16) after the elastic seal cures or that the elastic seal (19) is designed to be connected to the spacer (14) as a cord.
6. The multi-pane insulated glass (10) according to one of claims 1 to 5, characterized in that a groove (20) is provided in the spacer (14) to receive the elastic seal (19).
7. The multi-pane insulated glass (10) according to one of claims 1 to 6, characterized in that the elastic seal (19) is an extrudate.
8. The multi-pane insulated glass (10) according to one of claims 1 to 7, characterized in that a secondary sealant (18) is provided which is introduced externally around the spacer in a groove defined by the panes and the spacer, wherein in particular the secondary sealant (18) comprises or is polyurethane, silicone or a polysulfide.

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