Composite element for an insulating glass pane

Abstract

The present invention relates to a composite element (10), in particular a composite element (10) for an insulating glass unit, comprising at least a first pane element (20) and at least a second pane element (22) as well as at least a first profile element (30), wherein the profile element (30) has at least a first bonding surface (32) and / or at least a second bonding surface (33), wherein the first and / or the second bonding surface (32, 33) is provided and configured for the application and / or reception of a first bonding agent (40),wherein a third bonding surface (34) for applying and / or receiving a second bonding agent (50) is provided adjacent to the first bonding surface (32), and / or a fourth bonding surface (35) for applying and / or receiving a second bonding agent (50) is provided adjacent to the second bonding surface (33), and wherein the first disc element (20) and the second disc element (22) are connectable or connected by means of the profile element (30) and the first bonding agent (40) and / or the second bonding agent (50), wherein the first bonding agent (40) is a two-component (meth)acrylate adhesive. A barrier film (60) is further provided, which is attached to the profile element (30) and extends between the second bonding agent (50) and the third bonding agent (52), preferably without being in direct contact with the first or second disc element (20, 22). Furthermore, the present invention relates to an insulating glass pane (100),a profile element (30), a window, a door and a method for manufacturing a composite element or an insulating glass pane (100).

Description

Technical field

[0001] The present invention relates to a composite element, in particular a composite element for an insulating glass pane, an insulating glass pane, a profile element, a window, a door and a method for manufacturing a composite element or an insulating glass pane. State of the art

[0002] Insulating glass panes are already known from the state of the art.

[0003] Multiple-pane insulating glass (MIG), also known as thermal insulation glazing or insulating glass, is a building component composed of at least two panes of glass, used, for example, in windows. Between the panes is a cavity that is airtight and serves as thermal insulation. Its predecessors included double glazing without an air seal, the so-called composite window, and double single glazing in box windows or winter windows.

[0004] Insulating glazing, unlike other types of thermal insulation glazing, is a self-contained system that does not require a surrounding frame – usually a window sash – to function properly. This is achieved by means of an edge seal that holds the individual panes of glass together at a distance and simultaneously hermetically seals the space between the panes. For many years now, this space has not contained air, but rather, for example, the better insulating noble gas argon.

[0005] To minimize heat conduction in an insulating glass unit, the space between the panes can be increased. However, since gases transfer heat not only through conduction but also through convection as their volume increases, the thermal insulation decreases again due to the trapped gas beyond a certain distance between the panes. To prevent this, a third pane of glass is typically installed within the insulating glass unit.

[0006] The edge seal has the task of mechanically holding the glass panes together at a distance and preventing the gas filling from escaping and allowing ambient air and humidity to penetrate instead.

[0007] At the beginning of the technical development of double-glazed insulating glass, a metallic spacer was soldered between the two panes. Another method was to melt and simultaneously bend the edge of the glass to weld the individual panes together.

[0008] For decades, however, a two-stage bonded edge seal has been standard practice. A 10 to 20 mm wide profile made of aluminum, stainless steel, or plastic—the so-called spacer—is coated on both sides with an adhesive layer of butyl rubber. It bonds the panes together after being pressed firmly together and simultaneously forms the first sealing layer. For example, DE 102 11 940 A1 describes a door leaf made of two glass panes, in which the panes are connected by a profile positioned at their edges. A butyl material is used between the profile and each pane as an adhesive and vapor barrier layer, intended to protect the interior of the door leaf from moisture penetrating from the outside.

[0009] After the space between the panes is filled with gas, the gap between the perimeter of the spacer and the protruding glass edges is sealed with a second permanently elastic sealing layer made of polyurethane or special polysulfides. For facade elements exposed to UV light at this point, silicone is used, although it is more gas-permeable. An example of the use of polysulfide or silicone sealants can be found in EP 0 852 280 A1, which deals with spacers for multiple-pane insulating glass units. The spacers described therein are characterized by a metal foil applied to the entire bonding surface facing away from the glazing cavity.

[0010] The edge seal only guarantees the functionality of the insulating glass unit for a limited period, as gas diffusion through a bonded edge seal cannot be completely prevented. This results in a continuous deterioration of the thermal insulation value due to the escaping gas – the target is a maximum gas loss of 1% per year – and allows ambient air and humidity to penetrate. Literature cites a service life of 20 to 30 years. To prevent the penetrating moisture from condensing in the space between the panes, a desiccant from the silica gel or molecular sieve (zeolite) material family is incorporated into the spacer, as described, for example, in EP 0 228 641 A2. Once the desiccant is depleted, the inner surface of the pane fogs up. This is referred to as a "fogged pane."

[0011] The edge seal reduces the thermal insulation of an insulating glass unit. The heat transfer coefficient for insulating glass is given as the Ug value (g = glazing) and does not take the effects of the edge seal into account. A double-glazed insulating glass unit measuring 1 m × 1 m with a conventional aluminum spacer (psi value: 0.068 W / m•K) and a Ug value of 1.2 W / m²K would have a U-value of: 1.2 W / m²K + (4 m × 0.068 W / m•K) = 1.5 W / m²K if the effect of the edge seal were included.

[0012] The reduced thermal insulation value at the edge of the pane leads to the formation of condensation on the inner edge of the pane at low outside temperatures. (Since older window units often have high permeability through the joints, the condensation is dried by penetrating cold air and is then not noticeable.) By using a thermally improved edge seal – the so-called warm edge with Psi values ​​of 0.03 W / m•K to 0.05 W / m•K – condensation only occurs at lower outside temperatures, depending on the Psi value and the room humidity.

[0013] However, the well-known insulating glass units with the aforementioned two-stage bonded edge seal present the problem that these constructions are comparatively complex and robust in terms of the loads that occur, such as the thermal expansion of the glass and the spacer, the weight of the glass itself, and traffic loads like wind pressure, suction, and operating forces. These constructions are complex and expensive to manufacture and, due to the relatively robust edge seals, have an additional weight, which places further demands on the fastening system, especially in large-area insulating glass units. For aesthetic reasons, however, slimmer, more delicate insulating glass constructions with smaller and less conspicuous edge seals would often be desirable.

[0014] To solve this problem, new bonding solutions have been developed. For example, WO 2014 / 184256 A1 discloses a significantly improved composite element for insulating glass units that is particularly shear-resistant, yet lightweight, stable, and cost-effective. This is achieved, among other things, through the use of two-component (meth)acrylate adhesives as structural adhesives for bonding the glass units to the frame elements. SikaFast®<-5211 is recommended as a particularly suitable adhesive of this type. By using such adhesives with a high shear modulus and high strength, a particularly stable composite element can be produced that can be used without additional stiffening elements, such as the frame profiles with large cross-sections that are usually required. This allows for the production of lighter, slimmer, and more aesthetically pleasing composite elements, for example, for large-area glazing in buildings.

[0015] However, it has become apparent that the solution revealed in WO 2014 / 184256 A1, despite the significant improvements, still has certain disadvantages.

[0016] It is therefore the object of the present invention to advantageously further develop a composite element, in particular a composite element for an insulating glass unit, an insulating glass unit, a profile element, a window, a door, and a method for manufacturing a composite element or an insulating glass unit, in particular in such a way that an insulating glass unit can be provided which is particularly shear-resistant, but at the same time light, stable and more cost-effective due to material savings than most conventional insulating glass units, and which additionally has improved gas and moisture tightness compared to the prior art as taught, for example, in WO 2014 / 184256 A1. Description of the invention

[0017] This problem is solved according to the invention by a composite element with the features of claim 1. It is provided that a composite element, in particular a composite element for an insulating glass unit, comprises at least a first pane element, at least a second pane element, and a space formed between the first pane element and the second pane element, as well as at least one profile element, wherein the profile element has an outer surface facing away from the space between the panes and an inner surface facing the space between the panes, and wherein the profile element has at least a first connecting surface and at least a second connecting surface, wherein a first connecting means is provided on the first and on the second connecting surface, and wherein the profile element has a third connecting surface adjacent to the first connecting surface, on which a second connecting means is provided.and adjacent to the second bonding surface, a fourth bonding surface on which a third bonding agent is provided, and wherein the first pane element and the second pane element are connected, in particular in a shear-resistant manner, by means of the profile element and the first bonding agent, the second bonding agent, and the third bonding agent, wherein the first bonding agent is a two-component (meth)acrylate adhesive, characterized in that a barrier film is provided which is attached to the profile element and extends between the second bonding agent and the third bonding agent such that a first film edge of the barrier film is received on or in the second bonding agent and a second film edge of the barrier film is received on or in the third bonding agent, and thus the barrier film is formed and arranged to seal the space between the panes against gas loss.

[0018] The composite element can, in particular, be a composite element for an insulating glass unit. The profile element can, for example, be the spacer of an insulating glass unit.

[0019] This results in the particular advantage that a composite element comprising at least one first and at least one second pane element, which can be used, for example, in conjunction with insulating glass panes for windows or doors, can be provided in a particularly shear-resistant, but at the same time lightweight, stable and more cost-effective manner due to the material savings, and is also gas- and moisture-tight.

[0020] The composite element according to the invention, due to its advantageous mechanical properties, can be used without or with significantly reduced additional stiffening measures, such as metal stiffeners in the window frame. This allows for narrower frames and larger glazing units, which increases light transmission through the larger possible glazing area, reduces the known heat loss through metal stiffeners, and expands design freedom in the manufacture of insulating glass units. Furthermore, manufacturing requires fewer steps, conserving resources, saving costs, and simplifying efficient, automated production.

[0021] The first and second pane elements can be, for example, glass panes or plastic panes.

[0022] Since insulating glass units, comprising at least one first pane and at least one second pane, are typically filled with a noble gas, usually argon, it is essential to prevent these noble gases from escaping the space between the panes over the unit's service life. The noble gas improves the insulating effect of the insulating glass unit. Gas loss leads to reduced insulation performance. To reduce gas loss, a barrier film is used, as proposed. This barrier film is attached to the profile element in such a way that it seals the space between the panes as completely as possible, up to the second or third bonding agent, preventing gas loss. Sealing the space between the panes is also necessary with shear-resistant bonding. This is because, due to the shear-resistant bonding, it may be necessary to optimize the geometry of the profile element to increase the rigidity of the insulating glass unit.The arrangement of the barrier film and the second and third bonding agents must be taken into account to ensure gas tightness even with the shear-resistant solution. The gas tightness of insulating glass units is regulated in DIN EN 1279-3.

[0023] In the opposite direction to gas loss from the space between the panes, the sealing system formed by the second and third bonding agents and the barrier film prevents moisture from penetrating the space between the panes. Penetrating moisture would cause the surfaces of the first or second pane facing the space between the panes to become wet with condensation. The penetrating water damages the glass surface and its coating. Besides the visible formation of droplets, this leads to a so-called "clouding" of the pane, whereby the moisture penetrating the space between the panes causes the pane to become milky and cloudy.

[0024] In a preferred embodiment, this process can be delayed by introducing a desiccant located in the space between the panes. However, once the desiccant reaches its saturation point, condensation forms, leading to the aforementioned clouding of the insulating glass unit. In a preferred embodiment, the desiccant can be contained within or by the profile element. The profile element is sealed to the ambient air by the barrier film but open to the space between the panes, allowing moisture in the space between the panes to be absorbed by the desiccant contained within the profile element.

[0025] The second and third bonding agent, which preferably is at least partially polyisobutylene (PIB) and / or comprises, seals the gap between the disc elements and the barrier film or the gap between the disc elements and the profile element against penetrating moisture.

[0026] The moisture tightness of insulating glass units is regulated in DIN EN 1279-2.

[0027] The barrier film can be multilayered. It can comprise at least one polymeric film, for example, with a thickness of 10 µm to 100 µm, at least one polymeric layer, for example, with a thickness of 5 µm to 80 µm, and a metallic layer, for example, with a thickness of 10 nm to 1500 nm, or a ceramic layer, for example, with a thickness of 10 nm to 1500 nm. The polymeric film and the polymeric layer can be made of the same material and / or have the same thickness. The barrier film can have at least two metallic layers and / or ceramic layers arranged alternately with at least one polymeric layer. For example, the barrier film can consist of a polymeric film with a metallic layer on it, a polymeric layer placed on top of that, and a second metallic layer. consist of a layer.

[0028] The barrier film can be multilayered, comprising at least one metal-containing barrier layer, for example with a thickness of 1 µm to 20 µm, a polymer layer, for example with a thickness of 5 µm to 80 µm, and a metal-containing thin film, for example with a thickness of less than 100 nm, in particular a thickness of 5 nm to 30 nm. The individual layers can be bonded together by adhesives. The barrier film can also include at least one second metal-containing thin film.

[0029] The metal-containing thin film can be adjacent to the polymer layer. The metal-containing thin film can be on the outside, so that the layer sequence is, for example: metal-containing barrier layer - polymer layer - metal-containing thin film. Alternatively, the polymer layer can also be on the outside, so that the layer sequence is, for example: metal-containing barrier layer - metal-containing thin film - polymer layer.

[0030] The metal-containing thin film is preferably deposited by a PVD process (physical vapor deposition). The metal-containing thin film preferably contains metals and / or metal oxides. Particularly preferably, the metal-containing thin film consists of aluminum and / or aluminum oxide.

[0031] The metal-containing barrier layer preferably contains aluminium, silver, copper and / or alloys or mixtures thereof.

[0032] The polymeric layer and / or polymeric film preferably comprises polyethylene terephthalate, ethylene vinyl alcohol, polyvinylidene chloride, polyamides, polyethylene, polypropylene, silicones, acrylonitriles, polyacrylates, polymethyl acrylates and / or copolymers or mixtures thereof.

[0033] The barrier film can exhibit a gas permeation of less than 0.001 g / (m2 h).

[0034] The barrier film can be designed differently.

[0035] The shear-resistant bonding proposed for this composite element, in addition to the additional sealing achieved by the second and third bonding agents, serves to permanently bond the glass panes of the insulating glass units. The connection of the glass panes to the profile element is made via a two-component (meth)acrylate adhesive applied to the bonding surfaces of the profile element.

[0036] The first bonding agent is therefore a two-component (meth)acrylate adhesive, which in a preferred embodiment may further comprise: a component K1, comprising a) at least one monomer A according to formula (Illa), where R1< represents either a hydrogen atom or a methyl group, preferably a methyl group; R2< represents either a linear or branched hydroxyalkyl group with 2 to 6 carbon atoms or a residue with 4 to 8 carbon atoms comprising either a phenyl group or an aliphatic 5- or 6-membered ring with at least one ether oxygen in the ring structure; b) at least one monomer B according to formula (IIIb), where R3< represents either a hydrogen atom or a methyl group, preferably a methyl group; R4< represents a linear alkyl group with more than 12 carbon atoms in the chain and preferably at most 20 carbon atoms in the chain; c) preferably between 10 wt.% and 20 wt.%, based on component K1, at least one elastomer C of formula (I), wherein R represents either a hydrogen atom or a methyl group; X represents a polymeric polyol after removal of two OH groups; and Y represents O or NR", wherein R represents a hydrocarbon residue or a hydrogen atom, preferably a hydrogen atom; and d) preferably at least one additive selected from the group consisting of core-shell polymer, radical curing activator, radical curing inhibitor, filler, and adhesion promoter; with the proviso that component K1 between 25 wt.% and 75 wt.%, preferably between 40 wt.% and 60 wt.%, based on component K1, of the mixture of monomer A and monomer B contains, and with the stipulation that the mass ratio of monomer A to monomer B in component K1 between 1:1 and 9:1, preferably between 6:4 and 8:2; and a component K2,comprehensively at least one initiator of radical hardening.

[0037] Substance names beginning with "Poly", such as polyisocyanate, polyurethane, polyester or polyol, refer in this document to substances that formally contain two or more of the functional groups appearing in their name per molecule.

[0038] In this document, the term "polymer" encompasses, on the one hand, a group of chemically uniform macromolecules that differ in degree of polymerization, molar mass, and chain length, and which are produced by a polymerization reaction (polymerization, polyaddition, polycondensation). On the other hand, the term also includes derivatives of such a group of macromolecules from polymerization reactions; that is, compounds obtained by changes, such as additions or substitutions, of functional groups on given macromolecules, and which may be chemically uniform or chemically heterogeneous. Furthermore, the term also includes so-called prepolymers, that is, reactive oligomeric pre-adducts whose functional groups are involved in the construction of macromolecules.

[0039] In this document, the term "polymeric polyol" encompasses any polymer, as defined above, that contains more than one hydroxyl group. Similarly, the term "polymeric diol" encompasses any polymer containing exactly two hydroxyl groups. The term "polyurethane polymer" includes all polymers produced by the so-called diisocyanate polyaddition process. This also includes polymers that are almost or entirely free of urethane groups. Examples of polyurethane polymers are polyether polyurethanes, polyester polyurethanes, polyether polyureas, polyureas, polyester polyureas, polyisocyanurates, and polycarbodiimides.

[0040] In this document, "molecular weight" refers to the defined and discrete molar mass (in grams per mole) of a molecule or a part of a molecule, also referred to as a "residue". "Mean molecular weight" refers to the number mean Mn of a particularly polydisperse oligomeric or polymeric mixture of molecules or residues, which is usually determined by gel permeation chromatography (GPC) against polystyrene as a standard.

[0041] The term "(Meth)acrylate" means "methacrylate" or "acrylate".

[0042] A dashed line in the formulas in this document represents the bond between a substituent and the associated molecular residue, unless otherwise specified.

[0043] Room temperature is defined as approximately 23°C. Unless otherwise stated, all industry norms or standards mentioned in this document refer to the version of the industry norm or standard valid at the time of filing the patent application.

[0044] The terms "mass" and "weight" are used synonymously in this document. Thus, a "weight percent" (wt%) refers to a percentage mass fraction which, unless otherwise stated, relates to the mass (weight) of the entire composition, or, depending on the context, to the entire molecule.

[0045] The two-component (meth)acrylate adhesive used as the first bonding agent consists of a first component K1 and a second component K2.

[0046] The component K1 initially comprises at least one monomer A according to formula (Illa), where R 1< represents either a hydrogen atom or a methyl group, preferably a methyl group; R 2< represents either a linear or branched hydroxyalkyl group with 2 to 6 carbon atoms or a residue with 4 to 8 carbon atoms comprising either a phenyl group or an aliphatic 5- or 6-ring with at least one ether oxygen in the ring structure.

[0047] R 1< in formula (IIIa) preferably represents a methyl group.

[0048] In a preferred embodiment, R 2< in formula (Illa) represents a linear or branched hydroxyalkyl group with 2 to 4 carbon atoms. Examples of such monomers are hydroxypropyl acrylate (HPA), hydroxypropyl methacrylate (HPMA), hydroxybutyl acrylate (HBA) or hydroxybutyl methacrylate (HBMA), preferably hydroxyethyl acrylate (HEA) or hydroxyethyl methacrylate (HEMA), with hydroxyethyl methacrylate (HEMA) being particularly preferred.

[0049] In another preferred embodiment, R 2< in formula (Illa) represents a residue with 4 to 8 carbon atoms comprising an aliphatic 5- or 6-ring with one or two ether oxygens in the ring structure.

[0050] In most cases, R 2< in formula (Illa) represents a hydroxyethyl group or a benzyl group or at least one of the groups (IVa) to (IVc) in formula (IV). where the dashed lines in forms (IV) represent the bond between the oxygen atom and R 2<. Examples of such monomers A are benzyl acrylate (BNA), benzyl methacrylate (BNMA), hydroxyethyl acrylate (HEA), hydroxyethyl methacrylate (HEMA), tetrahydrofurfuryl methacrylate (THFMA), and the isomer mixture glycerol formal methacrylate (“Glycerol formal methacrylate” comprising structures (IVb) and (IVc) in formula (IV); CAS No. 1620329-57-8), which is available from Evonik under the trade name GLYFOMA.

[0051] Most preferred monomers A These include benzyl methacrylate (BNMA), tetrahydrofurfuryl methacrylate (THFMA), hydroxyethyl methacrylate (HEMA), and glycerol formyl methacrylate (GLYFOMA).

[0052] Of course, mixtures of these monomers are also possible. A be used.

[0053] The component K1 further includes at least one monomer B according to formula (IIIb), where R 3< represents either a hydrogen atom or a methyl group, preferably a methyl group; and R 4< represents a linear alkyl group with more than 12 carbon atoms in the chain and preferably at most 20 carbon atoms in the chain.

[0054] R 3< in formula (IIIb) preferably represents a methyl group.

[0055] R4< in formula (IIIb) preferably represents a linear alkyl group with 13 to 18 carbon atoms in the chain. If a mixture of different chain lengths is present in the group R4<, the average value of the chain lengths formally serves as the measure of the effective chain length in R4<.

[0056] Examples of such monomers B The following are suitable: lauryl tetradecyl acrylate (LATEA), lauryl tetradecyl methacrylate (LATEMA), stearyl acrylate (STEA), and stearyl methacrylate (STEMA). Lauryl tetradecyl methacrylate (LATEMA) and stearyl methacrylate (STEMA) are the most preferred.

[0057] component K1 contains between 25 wt.% and 75 wt.%, preferably between 40 wt.% and 60 wt.%, based on component K1, of the mixture of monomer A and monomer B.

[0058] The mass ratio of monomer is A to monomer B in component K1The ratio should be set between 1:1 and 9:1, preferably between 6:4 and 8:2. Within these limits, it is possible to achieve improved elasticity both at room temperature and at very low temperatures down to -20 °C.

[0059] In particular, the two-component (meth)acrylate adhesive contains no monomers other than those described above. A and B. component K1 preferably contains between 10 wt.% and 20 wt.%, based on component K1, at least one elastomer C the formula (I), where R represents either a hydrogen atom or a methyl group; X represents a polymeric polyol after removal of two OH groups; and Y represents O or NR", where R represents a hydrocarbon residue or a hydrogen atom, preferably a hydrogen atom.

[0060] The elastomer CFormula (I) preferably has an average molecular weight of 1,000 to 40,000 g / mol, in particular of 1,000 to 30,000 g / mol, preferably of 1,000 to 20,000 g / mol.

[0061] In the elastomer C In formula (I), the residue X represents a polymeric polyol after removal of two OH groups, wherein this polymeric polyol is in particular a polyalkylene polyol, a polyoxyalkylene polyol or a polyurethane polyol; a polyhydroxy-functional ethylene-propylene, ethylene-butylene or ethylene-propylene diene copolymer; a polyhydroxy-functional copolymer of dienes such as 1,3-butanediene or diene mixtures and vinyl monomers such as styrene, acrylonitrile or isobutylene; a polyhydroxy-functional polybutadiene polyol; a polyhydroxy-functional acrylonitrile / butadiene copolymer; or a polysiloxane polyol.

[0062] Polyhydroxy-terminated acrylonitrile / butadiene copolymers are typically produced from carboxyl-terminated acrylonitrile / butadiene copolymers, which are commercially available, for example, under the name Hycar® CTBN from Emerald Performance Materials, LLC, USA, and epoxides or amino alcohols.

[0063] Suitable elastomers C Formula (I) is commercially available, for example, from Kraton Polymers, USA, or under the trade names Hycar ®< VTB and Hycar ®< VTBNX from Emerald Performance Materials, LLC, USA.

[0064] In particular, the polymeric polyol is a polymeric diol PD.

[0065] In the elastomer C The compound of formula (I) is preferably a polyurethane (meth)acrylate. Such compounds are typically prepared by the reaction of at least one diol Dwith at least one diisocyanate and one (meth)acrylic acid, one (meth)acrylamide or one (meth)acrylic acid ester, which has a hydroxyl group.

[0066] In a first step, this implementation can be achieved by the diol DThe diisocyanate is then reacted using conventional methods, for example at temperatures of 50 °C to 100 °C, optionally with the use of suitable catalysts, ensuring that the NCO groups are present in stoichiometric excess compared to the OH groups. The polyurethane polymer resulting from this reaction, terminated by isocyanate groups, is then reacted with a (meth)acrylic acid, a (meth)acrylamide, or with a (meth)acrylic acid ester having a hydroxyl group, in particular with a hydroxyalkyl (meth)acrylate such as hydroxypropyl acrylate (HPA), hydroxypropyl methacrylate (HPMA), hydroxybutyl acrylate (HBA), or hydroxybutyl methacrylate (HBMA), preferably with hydroxyethyl acrylate (HEA) or hydroxyethyl methacrylate (HEMA), or with a monohydroxypoly(meth)acrylate of a polyol, preferably glycerol or trimethylolpropane, to form a polyurethane (meth)acrylate.

[0067] In a second procedure, the diol D The diisocyanate is reacted with the OH groups, with the OH groups being present in stoichiometric excess compared to the NCO groups. The polyurethane polymer resulting from this reaction, which terminates in hydroxyl groups, can be reacted with a (meth)acrylic acid to form an elastomer. C esterified according to formula (I).

[0068] Another method for producing the elastomer CThe first step involves reacting (meth)acrylic acid, (meth)acrylamide, or (meth)acrylic acid ester containing a hydroxyl group, in particular hydroxyalkyl(meth)acrylate such as hydroxypropyl acrylate (HPA), hydroxypropyl methacrylate (HPMA), hydroxybutyl acrylate (HBA), or hydroxybutyl methacrylate (HBMA), preferably hydroxyethyl acrylate (HEA) or hydroxyethyl methacrylate (HEMA), or a monohydroxypoly(meth)acrylate of a polyol, preferably glycerol or trimethylolpropane, with at least one diisocyanate, the diisocyanate being used in such an amount that the NCO groups are in excess of the OH groups. In a subsequent reaction, the resulting intermediate containing an isocyanate group is reacted with at least one diol. D to the elastomer C The formula (I) is implemented. The production of the elastomer is also possible. C of formula (I) by esterification of a (meth)acrylic acid with a diol D,the diol is present in stoichiometric excess. In a subsequent reaction, the partially esterified diol reacts D with a diisocyanate to form the elastomer C of formula (I).

[0069] Preferred Diols D These are polyoxyalkylene diols, also called "polyether diols", polyester diols, polycarbonate diols, and mixtures thereof. The most preferred diols are polyoxyethylene diols, polyoxypropylene diols, or polyoxybutylene diols.

[0070] Polyoxyalkylene diols can exhibit varying degrees of unsaturation (measured according to ASTM D-2849-69 and expressed in milliequivalents of unsaturation per gram of polyol (mEq / g)). Those with a low degree of unsaturation are produced, for example, using so-called double metal cyanide complex catalysts (DMC catalysts), while those with a higher degree of unsaturation are produced, for example, using anionic catalysts such as NaOH, KOH, CsOH, or alkali alkoxides.

[0071] The use of polyoxyalkylene diols with a low degree of unsaturation, particularly less than 0.01 mEq / g, is preferred for diols with a molecular weight of ≥ 2000 g / mol.

[0072] In principle, all diisocyanates are suitable as diisocyanates. Examples include 1,6-hexamethylene diisocyanate (HDI), 2-methylpentamethylene-1,5-diisocyanate, 2,2,4- and 2,4,4-trimethyl-1,6-hexamethylene diisocyanate (TMDI), 1,12-dodecamethylene diisocyanate, lysine and lysine ester diisocyanate, cyclohexane-1,3-diisocyanate, cyclohexane-1,4-diisocyanate, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethyl-cyclohexane (= isophorone diisocyanate or IPDI), perhydro-2,4'-diphenylmethane diisocyanate and perhydro-4,4'-diphenylmethane diisocyanate, 1,4-diisocyanato-2,2,6-trimethylcyclohexane (TMCDI), 1,3- and 1,4-bis-(isocyanatomethyl)-cyclohexane, m- and p-xylylene diisocyanate (m- and p-xylylene diisocyanate). p-XDI), m- and p-tetramethyl-1,3-xylylene diisocyanate, m- and p-tetramethyl-1,4-xylylene diisocyanate, bis-(1-isocyanato-1-methylethyl)-naphthalene, 2,4- and 2,6-toluene diisocyanate (TDI), 4,4'-, 2,4'- and 2,2'-diphenylmethane diisocyanate (MDI), 1,3- and 1,4-phenylene diisocyanate, 2,3,5,6-tetramethyl-1,4-diisocyanatobenzene, naphthalene-1,5-Diisocyanate (NDI), 3,3'-Dimethyl-4,4'-diisocyanatodiphenyl (TODI); oligomers and polymers of the aforementioned isocyanates, and any mixtures of the aforementioned isocyanates. The preferred diisocyanate is 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (IPDI).

[0073] Elastomer is the most preferred option. C a polyurethane(meth)acrylate, in particular producible from the reaction of at least one diol D, in particular a polyoxypropylene diol, comprising at least one diisocyanate and a (meth)acrylic acid ester having a hydroxyl group, wherein the Diol Dwith a diisocyanate, in particular isophorone diisocyanate, which is present in stoichiometric excess; and the resulting isocyanate-terminated polyurethane with the (meth)acrylic acid ester, which has a hydroxyl group, in particular with a hydroxyalkyl(meth)acrylate, preferably with hydroxyethyl acrylate (HEA) or hydroxyethyl methacrylate (HEMA) to form the elastomer C is implemented in formula (I).

[0074] A particularly preferred embodiment of the component K1 contains as monomer A Tetrahydrofurfuryl methacrylate (THFMA), as a monomer B Lauryl tetradecyl methacrylate (LATEMA) and / or stearyl methacrylate (STEMA) and in particular no other monomers, and as an elastomer C a polyurethane (meth)acrylate.

[0075] Another particularly preferred embodiment of the component K1 contains as monomer A Glycerolformyl methacrylate (GLYFOMA), as a monomerB Lauryl tetradecyl methacrylate (LATEMA) and / or stearyl methacrylate (STEMA) and in particular no other monomers, and as an elastomer C a polyurethane (meth)acrylate.

[0076] Another particularly preferred embodiment of the component K1 contains as monomer A Hydroxyethyl methacrylate (HEMA), as a monomer B Lauryl tetradecyl methacrylate (LATEMA) and / or stearyl methacrylate (STEMA) and in particular no other monomers, and as an elastomer C a polyurethane (meth)acrylate.

[0077] Another particularly preferred embodiment of the component K1 contains as monomer A Benzyl methacrylate (BNMA), as a monomer B Lauryl tetradecyl methacrylate (LATEMA) and / or stearyl methacrylate (STEMA) and in particular no other monomers, and as an elastomer C a polyurethane (meth)acrylate.

[0078] The adhesive preferably contains component K1 additionally between 0.5 wt.% and 5 wt.%, based on component K1, an adhesion promoter, in particular an organosilane, and / or a metal (meth)acrylate or a (meth)acrylate of formula (II).

[0079] The R' group represents either a hydrogen atom or a methyl group. n represents a value from 1 to 15, particularly from 1 to 5, preferably from 1 to 3. m represents a value from 1 to 3, and p represents a value of 3 minus m.

[0080] Preferred metal (meth)acrylates are metal (meth)acrylates of calcium, magnesium, or zinc, which have a hydroxyl group and / or (meth)acrylic acid or (meth)acrylate as a ligand or anion. Particularly preferred metal (meth)acrylates are zinc (meth)acrylate, calcium (meth)acrylate, Zn(OH)(meth)acrylate, and magnesium (meth)acrylate.

[0081] Preferred (meth)acrylates of formula (II) are 2-methacryloyloxyethyl phosphate, bis(2-methacryloyloxyethyl) phosphate, tris(2-methacryloyloxyethyl) phosphate, and mixtures thereof.

[0082] Preferred organosilanes are epoxy-functional silanes, especially 3-glycidoxypropyltrimethoxysilane.

[0083] Adhesion promoters serve to improve adhesion to specific substrates. The use of phosphorus-containing (meth)acrylates according to formula (II) is particularly advantageous for metal surfaces (aluminum, anodized aluminum, etc.).

[0084] Organosilanes improve adhesion to glass and ceramic surfaces. Metal (meth)acrylates are also advantageous for bonding, for example, to metal surfaces.

[0085] Of course, mixtures of different adhesion promoters can also be used.

[0086] The proportion of any liability intermediary in componentK1 preferably amounts to between 1 and 3 wt.%, based on component K1

[0087] Furthermore, the adhesive can be used in components K1 Preferably, the polymers also contain at least one core-shell polymer. Core-shell polymers consist of an elastic core polymer and a rigid shell polymer. In particular, suitable core-shell polymers consist of a rigid shell of a rigid thermoplastic polymer grafted onto a core of cross-linked elastic acrylate or butadiene polymer.

[0088] Particularly suitable core-shell polymers are those which, in the monomer A and / or in the comonomer B swell up, but do not dissolve within it.

[0089] Preferred core-shell polymers are so-called MBS polymers, which are commercially available, for example, under the trade names Clearstrength® from Arkema Inc., USA, or Paraloid® from Rohm and Haas, USA. The core-shell polymers are preferably used in an amount of 0.01 to 30 wt.%, particularly 5 to 20 wt.%, based on the component. K1, used.

[0090] Furthermore, the two-component adhesive can be divided into components. K1 Additionally, preferably at least one activator for radical hardening, also referred to as a catalyst, is included. The activator is in particular a tertiary amine, a transition metal salt, or a transition metal complex. For example, suitable tertiary amines include N,N-dimethylaniline, N,N-diethylaniline, and N,N-dimethyl- p -toluidine, N,N-Diethyl- p -toluidine, N-methyl-N-hydroxyethyl- p -toluidine N,N- until (2-hydroxyethyl)- p-toluidine and alkoxylated N,N-bis(hydroxyethyl)- p -toluidine, N-ethoxylated p Toluidine, N-alkylmorpholine, and mixtures thereof. Transition metal salts and transition metal complexes include, for example, salts and complexes of cobalt, nickel, copper, manganese, or vanadium. Mixtures of such substances can also be used as activators. N,N-Bis-(2-hydroxyethyl)-para-toluidine is the most preferred activator.

[0091] The activator is preferably used in an amount of 0.01 to 2.5 wt.%, in particular 0.5 to 2.5 wt.%, based on component K1, used.

[0092] Preferably, the two-component adhesive contains in component K1Additionally, an inhibitor for radical curing is included. These are substances that slow down or moderate the radical mechanisms of curing or inhibit undesired curing reactions (for example, UV light- or atmospheric oxygen-induced mechanisms), leading to improved storage stability and / or more controlled, uniform curing.

[0093] Preferably the component contains K1 between 0.001 wt.% and 0.5 wt.%, based on component K1, at least one inhibitor for radical hardening, in particular an alkylated phenol, preferably 2,6-di-tert-butyl-p-cresol.

[0094] Furthermore, component K1Preferably, the product also contains at least one filler. Particularly suitable fillers include natural, ground or precipitated calcium carbonates (chalk), optionally coated with fatty acids, especially stearates; montmorillonite; bentonite; barium sulfate (BaSO₄, also called barite or barite); calcined kaolin; quartz flour; aluminum oxides; aluminum hydroxides; silicas, especially pyrogenic silicas; modified castor oil derivatives; and polymer powders or polymer fibers. Calcium carbonates are preferred; coated calcium carbonates are usually preferred.

[0095] The filler is typically used in an amount of 0.01 to 35 wt.%, in particular 5 to 30 wt.%, preferably 15 to 25 wt.%, based on component K1, used.

[0096] The second component K2The two-component (meth)acrylate adhesive comprises at least one radical curing initiator. The initiator is a radical former that forms reactive radicals which initiate the radical curing mechanism of the monomers in component [component name missing]. K1 triggers.

[0097] Molecules that form radicals under the influence of heat or electromagnetic radiation, which then lead to the polymerization of the composition, are particularly suitable as such radical formers.

[0098] Radical generators include, in particular, thermally activatable radical generators and photoinitiators.

[0099] Thermally activatable radical initiators are particularly preferred if they are sufficiently stable at room temperature but form radicals at slightly elevated temperatures. In particular, such a radical initiator is a peroxide, a perester, or a hydroperoxide. Organic peroxides are preferred. Dibenzoyl peroxide is most often preferred.

[0100] Photoinitiators are radical initiators that form radicals under the influence of electromagnetic radiation. A photoinitiator that forms radicals when irradiated with electromagnetic radiation with a wavelength of 230 nm to 400 nm and is liquid at room temperature is particularly suitable.

[0101] The photoinitiator selected from the group consisting of α-hydroxyketones, phenylglyoxylates, monoacylphosphines, diacylphosphines, phosphine oxides, and mixtures thereof is particularly preferred, especially 1-hydroxycyclohexyl phenyl ketone, benzophenone, 2-hydroxy-2-methyl-1-phenylpropanone, methyl phenyl glyoxylate, oxyphenylacetic acid 2-[2-oxo-2-phenylacetoxy-ethoxy]ethyl ester, oxyphenylacetic acid 2-[2-hydroxy-ethoxy]ethyl ester, diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, and mixtures thereof. Such photoinitiators are commercially available, for example, from the IRGACURE® and DAROCUR® product lines of Ciba Speciality Chemicals, Switzerland. Mixtures of photoinitiators can also be used.

[0102] component K2 The two-component adhesive preferably contains between 5 wt.% and 75 wt.%, based on component K2,of at least one initiator for radical hardening, wherein in particular is a thermally activatable radical former, preferably a peroxide, a hydroperoxide or a perester, mostly preferably dibenzoyl peroxide, or wherein it is a photoinitiator, in particular a photoinitiator which forms radicals when irradiated with electromagnetic radiation of wavelength from 230 nm to 400 nm.

[0103] Most preferred as an initiator in component K2 is dibenzoyl peroxide. It is preferably used dispersed in a plasticizer. Component K2 The two-component (meth)acrylate adhesive preferably additionally contains at least one additive selected from the group consisting of plasticizer, filler, thixotope additive and dye, in particular all of these additives.

[0104] All non-reactive substances that are liquid at room temperature and are commonly used in this function in (meth)acrylate compositions are suitable as plasticizers.

[0105] The same fillers used for components, for example, can be used as fillers. K1 described as suitable.

[0106] Suitable colorants include non-reactive organic dyes and pigments. Suitable thixotropic additives include all additives commonly used in (meth)acrylate compositions.

[0107] The described adhesive may contain additional components in one or both components. Such additional components include viscosity modifiers, dyes, pigments, inhibitors, UV and heat stabilizers, metal oxides, antistatic agents, flame retardants, biocides, plasticizers, waxes, leveling agents, adhesion promoters, thixotropic agents, spacers, and other common raw materials and additives known to those skilled in the art.

[0108] The first bonding agent is a two-component (meth)acrylate composition, the two components of which K1 and K2 They must be stored separately until application. The first component includes K1 in particular those ingredients of the described composition which have radically polymerizable groups. The second component K2This includes, in particular, the radical initiators. Furthermore, in a two-component composition, other components, especially those that impair the storage stability of the composition through reaction with each other, can also be stored separately.

[0109] Typically, in such two-component (meth)acrylate adhesives, the component K1 the components monomers, elastomers, core-shell

[0110] Polymers, catalysts, adhesion promoters, pigments and fillers and the component K2 the components radical initiators, pigments and fillers. The mixing ratio of K1 to K2 The ratio is particularly in the range of 1:1 to 10:1.

[0111] The two-component (meth)acrylate adhesive described above, used as the first bonding agent, possesses high strength and stiffness, as well as sufficient elasticity, across a very wide temperature range covering the application range of insulating glass units. At room temperature, it exhibits high elasticity while simultaneously maintaining sufficient strength and stiffness to stabilize the composite element against stresses and wind loads, for example, without the need for additional bracing. Furthermore, it remains sufficiently elastic even at very low temperatures, such as down to -20 °C, surpassing conventional (meth)acrylate adhesives in this respect. Additionally, this two-component (meth)acrylate adhesive can be formulated without volatile, strongly unpleasant-smelling monomers such as methyl methacrylate (MMA).The elongations at break of the two-component (meth)acrylate adhesive used according to the invention, measured according to DIN EN 53504, are at least 100%, preferably at least 150%, and particularly at least 200% or higher at room temperature (23°C). At the same time, the two-component (meth)acrylate adhesive used according to the invention exhibits elongations at break of at least 20%, preferably at least 25%, and particularly at least 30% or higher at a temperature of -20°C, which represents a significant improvement compared to typical two-component (meth)acrylate adhesives of the prior art.

[0112] The second and / or third bonding agent is or preferably comprises at least partially polyisobutylene (PIB).

[0113] In some embodiments, the second and / or third fastener may also consist partially or entirely of the same material as the first fastener, i.e., a two-component (meth)acrylate adhesive as described above. This may be identical to the adhesive of the first fastener, or it may be a different embodiment of the described two-component (meth)acrylate adhesive of the first fastener.

[0114] In a composite element according to the invention, with a two-component (meth)acrylate adhesive designed according to the invention as the first bonding agent, one of the advantages is that a particularly shear-resistant structure can be achieved. By using such an adhesive as the first bonding agent, a significantly higher stiffness of the composite element can be achieved with simultaneously lower material usage compared to conventional adhesives such as silicones. In addition, the bonding agent also exhibits improved low-temperature stability compared to prior art (meth)acrylate adhesives.

[0115] Generally speaking, the stiffer the adhesive, the more shear-resistant the bond, but also the higher the stresses in the glass and the adhesive joint. High stresses can lead to glass and adhesive breakage. These stresses can arise from the difference in thermal expansion between the glass and the spacer, the weight of the glass itself, and from traffic loads such as wind pressure, suction, and operating forces.

[0116] It is therefore particularly important to select the stiffness of the adhesive such that, with optimal bonding, acceptable stresses are still transferred between the glass and the adhesive. The two-component (meth)acrylate adhesive formulated and used according to the invention exhibits particularly advantageous properties in this respect, as it possesses the necessary stiffness even at very low temperatures, as well as sufficient elasticity to absorb and transfer the tensile forces. At the same time, it possesses the other mechanical properties required for use as a primary bonding agent within the scope of this invention.

[0117] Important technical parameters therefore include, for example, the shear modulus of the adhesive, which is also temperature-dependent, as well as tensile strength and adhesion force. Furthermore, the coefficient of thermal expansion between the glass and the spacer, temperature differences between glass manufacturing and use, wind loads depending on the glass surface area, dead loads depending on glass thickness and surface area, and stresses caused by installation and use must also be considered. This type of structural glass bonding can, for example, achieve particularly gentle glazing and reduce the risk of glass breakage.

[0118] In a preferred embodiment, the first edge of the barrier film is arranged in the second bonding element such that a distance a1 remains between the first edge of the barrier film and the first pane element, and / or the second edge of the barrier film is arranged on or in the third bonding element such that a distance a2 remains between the second edge of the barrier film and the second pane element. A particular consideration in this embodiment is to avoid a heat conduction bridge across the barrier film from the first pane element to the second pane element.

[0119] In a preferred embodiment, the profile element can be made of a glass fiber reinforced plastic, e.g., BASF Ultraduf® < GF50. If the profile element, which acts as a spacer between the first and second pane elements, is made of glass fiber reinforced plastic, heat transfer can be further reduced compared to embodiments using metallic spacers.

[0120] There are several possibilities regarding the arrangement of the barrier film on or within the profile element, which are by no means exhaustive. In one possible configuration, the barrier film can be laminated onto the profile element. In another, equally possible configuration, the barrier film is embedded in the matrix of the profile element.

[0121] It is therefore conceivable to incorporate the barrier film into the profile element during its production.

[0122] In a further preferred embodiment, the profile element has a cavity that is in gas exchange with the space between the discs. In a preferred further development, a desiccant can be arranged in the cavity of the profile element or the cavity can be filled with a desiccant.

[0123] In one possible embodiment, the barrier film is arranged on the outer side of the profile element facing away from the cavity. In an alternative embodiment, the barrier film is arranged on the inner side of the profile element facing the cavity.

[0124] Furthermore, it is conceivable that the first and / or the second connecting surface is at least partially designed as a recess, in particular as a recess which is such that it is recessed compared to the third and / or fourth connecting surface, in particular with respect to the bearing surface on the first or second disc element.

[0125] The recess can be, for example, a joint or a stepped depression. The smaller the joint height, the more shear-resistant the bond. However, as the joint height decreases, the stress in the adhesive and glass increases. Therefore, the calculation is not linear. Corner areas can be particularly critical because the highest stresses can occur there. At the same time, the joint width plays a comparatively minor role in the shear-resistant bond. The stress in the adhesive and glass can be controlled by adjusting the joint width. Here, the larger the area (resulting from the joint width and perimeter), the lower the stress in the adhesive joint and between the adhesive and the glass.

[0126] Increased stiffness of the composite element is particularly advantageous when, for example, the composite element is used as an insulating glass unit and deflection due to wind loads may occur. This can happen, for instance, in the division area of ​​two-part windows or in the unsupported area of ​​facades. In such cases, it may be necessary to structurally reinforce the central section, which, according to current best practices, is achieved by using larger frame cross-sections or additional stiffeners within the frame profile. The design basis for the deflection must comply with the condition... <l / 200 genügen, wobei I die Länge der Glaskante ist. Mit schubfest verbundenem Glas gemäß einer erfindungsgemäßen Konstruktion mit einem Verbundelement bzw.In an advantageous embodiment, the previously necessary additional stiffeners can be completely or partially omitted and / or frame cross-sections can be reduced, or, with the same frame cross-sections and stiffeners, larger ones can be manufactured. This leads to sometimes considerable material savings and is also visually appealing.

[0127] It should be noted that the larger the gap between the panes, the stiffer the glass becomes. The calculation is not linear; the distance is cubed in the calculation.

[0128] In one possible embodiment, it is conceivable, for example, that the recess for applying the first bonding agent has a width of at least 5 mm, preferably at least 6 mm and a depth of at least 1.5 mm, preferably at least 2 mm, in order to ensure an extension of the first bonding agent between the first bonding surface and the first disk element and / or the second bonding surface and the second disk element in a width of at least 5 mm, preferably at least 6 mm, and in a thickness of at least 1.5 mm, preferably at least 2 mm.

[0129] In a further preferred embodiment, the profile element is positioned between the first disc element and the second disc element in such a way that its outer surface is flush with the first disc element and the second disc element.

[0130] In another possible embodiment, the profile element is positioned between the first and second pane elements such that the recesses for receiving the first connecting element face away from the space between the panes. In an alternative embodiment, the profile element is positioned between the first and second pane elements such that the recesses for receiving the first connecting element face towards the space between the panes.

[0131] Furthermore, the profile element may be designed to have a box-like base body with respect to its cross-section. This box-like shape can be achieved, for example, by having a substantially rectangular or square cross-section.

[0132] Furthermore, as already mentioned, it is conceivable that the base body is at least partially hollow inside or has and / or forms a cavity, whereby, for example, the cavity is at least partially permeable and / or perforated, and furthermore, for example, the cavity is at least partially filled with a desiccant (a hygroscopic material).

[0133] Furthermore, it is possible that a first web and / or a second web is formed on the base body, wherein at least one side wall of the first web forms at least partially the first connecting surface and / or wherein at least one side wall of the second web forms at least partially the first connecting surface.

[0134] Furthermore, it can be provided that the first pane element and the second pane element are at least partially made of glass, and the profile element, as already mentioned, is at least partially made of glass fiber reinforced material, in particular at least partially of glass fiber composite material, preferably at least partially of glass fiber reinforced plastic. This has the advantage that both the pane elements and the profile element have essentially the same coefficient of thermal expansion. This, in turn, has the advantage that stresses resulting from heat can be minimized.

[0135] Furthermore, the present invention relates to an insulating glass pane with the features of claim 20. According to this claim, an insulating glass pane is provided with at least one composite element according to one of claims 1 to 19.

[0136] Furthermore, the present invention relates to a window with the features of claim 21. According to this claim, a window is designed with a composite element according to one of claims 1 to 19.

[0137] Furthermore, the present invention relates to a door with the features of claim 22. According to this claim, a door is provided with at least one composite element according to one of claims 1 to 19 and / or with at least one insulating glass pane according to claim 20.

[0138] Furthermore, the present invention relates to a method for manufacturing a composite element with the features of claim 23. According to this claim, for the manufacture of a composite element, in particular a composite element for an insulating glass unit, at least one first pane element and at least one second pane element, as well as at least one first profile element, are joined together by bonding, wherein the profile element has at least one first bonding surface and / or at least one second bonding surface, wherein the first and / or the second bonding surface is provided and configured for the application and / or reception of a first bonding agent.wherein a third connecting surface is provided adjacent to the first connecting surface for the application and / or reception of a second connecting means and / or a fourth connecting surface is provided adjacent to the second connecting surface for the application and / or reception of a third connecting means and wherein the first disc element and the second disc element are connected by means of the profile element and the first connecting means and optionally the second connecting means and the third connecting means, wherein the composite element has the features according to any one of claims 1 to 19.

[0139] Furthermore, the present invention relates to a method for manufacturing an insulating glass pane with the features of claim 24. It is provided that for manufacturing an insulating glass pane, at least one composite element according to one of claims 1 to 19 or a composite element obtained by the method according to claim 23 is used. Brief description of the drawing

[0140] The following section provides a more detailed explanation of exemplary embodiments of the invention with reference to the drawings.

[0141] They show: Fig. 1 is a schematic cross-sectional view of a portion of an insulating glass unit according to the invention. Fig. 2 is a schematic cross-sectional view of a portion of another insulating glass unit according to the invention. Fig. 3 is a further embodiment of a composite element according to the invention. Fig. 4 is a further modified embodiment of a composite element according to the invention. Fig. 5 is a further modification of an embodiment of a composite element according to the invention.

[0142] Only the elements essential for an immediate understanding of the invention are shown. Method for implementing the invention

[0143] Figure 1 and Figure 2Figure 1 shows two embodiments of an insulating glass pane 100 with at least one composite element 10, which is formed by the pane elements 20 and 22 and the profile element 30.

[0144] The insulating glass pane 100 has in the Figure 1 and Figure 2 The illustrated embodiments include a third disc element 24 and a further profile element 30, which connects the third disc element 24 to the disc element 22. The two profile elements 30 are identical in construction within each embodiment, but differ between the two embodiments. The embodiment in Figure 1 In addition to a box-shaped base body 36, it has a first web 38 and a second web 39, which are described in more detail below. The exemplary embodiment in Figure 2 The embodiment has only a box-shaped base body 36 in cross-section. Figure 1 It can also be designed such that the first bridge 38 and the second bridge 39 are attached above the base body 36.

[0145] In all embodiments, it is conceivable that the space between the disk elements 20, 22, 24 is filled with a gas. Such a gas could, for example, be argon.

[0146] The second and third disc elements 22, 24, together with the further profile element located between them, form another composite element 10', which is essentially identical to the first composite element 10 and which is now described in detail below: The composite element comprises the first disc element 20 and a second disc element 22 as well as the first profile element 30 or spacer 30. The profile element 30 has a first connecting surface 32 and a second connecting surface 33, wherein the first and the second connecting surfaces 32, 33 are provided and designed for the application and reception of a first connecting element 40.

[0147] The first bonding agent 40 is, in all embodiments, a two-component (meth)acrylate adhesive as defined in claim 1, for example composition E1 as described further below. Calculations and tests with the components described in the Figure 1 and 2The illustrated embodiments and the embodiments of the two-component adhesive described below have shown that approximately 10 times higher stiffness can be achieved compared to conventional constructions without (meth)acrylate adhesives. At the same time, significantly higher low-temperature elasticity and thus stress fracture resistance of the bond is achieved compared to prior art constructions based on conventional (meth)acrylate adhesives.

[0148] The first and second connecting surfaces 32, 33 are designed as recesses which are such that they are set back from the third and / or fourth connecting surface 34, 35 with respect to the bearing surface on the first or second disk element 20, 22.

[0149] The recess here is a joint or a stepped recess. The smaller the joint height x, the more shear-resistant the bond becomes. However, as the joint height x decreases, the stress in the adhesive and glass increases. Therefore, the calculation is not linear. Corner areas can be particularly critical because the highest stresses can occur there. At the same time, the joint width y plays a comparatively minor role in the shear-resistant bond. The stress in the adhesive and glass can be controlled by adjusting the joint width y. Here, the larger the area (resulting from joint width and perimeter), the lower the stress in the adhesive joint and between the adhesive 40 and the glass of the pane element 20, 22.

[0150] Adjacent to the first bonding surface 32 is a third bonding surface 34 for the application and / or reception of a second bonding agent 50 and adjacent to the second bonding surface 33 is a fourth bonding surface 35 for the application and / or reception of a second bonding agent 50.

[0151] In both illustrated embodiments, the first disk element 20 and the second disk element 22 are connected by means of the profile element 30 and the first connecting agent 40 and the second connecting agent 50, here polyisobutylene (PIB).

[0152] The profile element 30 has in both embodiments in Figure 1 and Figure 2The basic body 36 has a box-like cross-section. The basic body 36 is at least partially hollow inside and has a cavity 37. The cavity 37 is at least partially permeable and perforated and filled with a hygroscopic material. This allows moisture to be absorbed.

[0153] On the base body 36 in the embodiment according to Figure 1 A first web 38 and a second web 39 are integrally formed, wherein a side wall of the first web 38 at least partially forms the first connecting surface 32 and wherein a side wall of the second web 39 at least partially forms the second connecting surface 33. However, embodiments are also possible in which the first web 38 and the second web 39 are attached above the base body 36.

[0154] Furthermore, in embodiments with a first web 38 and a second web 39, the webs are at least partially designed to exhibit a certain degree of flexibility, thereby compensating for stress forces that can occur, for example, due to high pressure differentials between the gas in the space between the disk elements 20, 22, 24 and atmospheric pressure. This provides additional stability. Such flexibility can be achieved, for example, by having a thinner wall thickness at at least one point in the respective web, allowing controlled, reversible bending. It is also possible to manufacture the respective web partially from a softer, more elastic material, thus achieving bending in the area of ​​this material.

[0155] The first disk element 20 and the second disk element 22 (and also the third disk element 24) are in both illustrated embodiments in Figure 1 and Figure 2 each is at least partially made of glass, and the profile element 30 is also made of glass fiber reinforced plastic.

[0156] In Figure 3 Figure 1 shows a further embodiment of a composite element according to the invention. In this embodiment, the profile element 30 is also designed as a hollow profile with a box-like base body 36 for a shear-resistant connection of a first disc element 20 to a second disc element 22, forming a space 26 between the discs. The profile element 30 has an outer surface 43 facing away from the space 26 between the discs and an inner surface 44 facing the space 26 between the discs.

[0157] The first and second bonding surfaces 32, 33 on the profile element 30 form recesses 42 for the introduction of the first bonding agent 40 in the form of a two-component (meth)acrylate adhesive, as defined in claim 1.

[0158] The recesses can specifically have a width of 6 mm and a depth of 2 mm. On the third and fourth bonding surfaces 34 and 35, a second bonding agent 50 and a third bonding agent 52, which in both cases is formed as polyisobutylene (PIB), are provided.

[0159] When installed, as seen from Figure 3 It can be seen that a layer thickness of 0.3 mm of the second bonding agent 50 or of the third bonding agent 52 is provided between profile element 30 and first disc element 20 or second disc element 22.

[0160] According to the invention, a barrier film 60 is arranged on the outer surface 43 of the profile element 30, for example laminated, which extends at both ends to the second connecting element 50 and the third connecting element 52 respectively, such that a first film edge 62 of the barrier film 60 is received at or in the second connecting element 50 and a second film edge 64 is received at or in the third connecting element 52.

[0161] Preferably, the barrier film 60 is not in contact with the first pane element 20 or the second pane element 22, but rather a distance a1 of at least 0.2 mm is provided between the first film edge 62 and the first pane element 20, and a similar distance a2 of at least 0.2 mm is provided between the second film edge 64 and the second pane element 22. The profile element 30 forms a cavity 37 which is filled with desiccant. Perforations 45 are provided on the inside 44 of the profile element 30 to allow gas exchange between the space between the panes 26 and the cavity 37.

[0162] As also from Figure 3As can be seen, the profile element can be arranged with its outer surface 43 flush with the outer edges of the first glazing element 20 and the second glazing element 22. This reduces the visible width of the profile element. This arrangement offers several advantages, namely, as already mentioned, improved aesthetics due to the reduced visible width and enhanced thermal insulation. Furthermore, sealant can also be saved.

[0163] Advantageous aspects also arise with regard to the manufacturing and function: First, a closed frame made of profile elements, as is conventionally known, is provided along the edges of the disc elements 20, 22. The profile element 30 is filled with desiccant. The second bonding agent 50 and the third bonding agent 52 are applied to the profile element 30 at the third and fourth bonding surfaces 34, 35. The first disc element 20, profile element 30, and second disc element 22 are pressed together. The second and third bonding agents 50, 52 provide early strength until a first bonding agent 40 is introduced and cured. In the present embodiment, the first bonding agent 40 can be injected into the two chambers created by the recesses 42 on the profile element 30 between the profile element 30 and the first disc element 20, and between the profile element 30 and the second disc element 22, respectively.The insulating glass unit is ready for use once the bonding agent has cured. When using Sika Fast as a two-component (meth)acrylate adhesive, this occurs after just a few minutes.

[0164] In Figure 4 A further modified embodiment of a composite element is illustrated. In the embodiment according to Figure 4The profile element 30 is designed as an open profile element with a cavity 37 open to the space between the panes 26. The barrier film 60 is arranged on an inner surface 44 of the profile element such that a first film edge 62 ends at or in the second connecting element 50, which is arranged on a third connecting surface 34 of the profile element between the profile element 30 and the first pane element 20, and a second film edge 64 of the barrier film 60 ends at or in the third connecting element 52, which is arranged on a fourth connecting surface 35 between the profile element 30 and the second pane element 22.

[0165] A desiccant, preferably a paste, can be arranged within the cavity 37 on the inner surface 44 of the profile element 30, which is covered by the barrier film 30. The profile element 30 has recesses 42 for forming the first bonding surface 32 and the second bonding surface 33, into which the first bonding agent 40 can be introduced.

[0166] Therefore, the production of the shear-resistant composite element, which is also resistant in this embodiment, is analogous to the production steps shown in the embodiment according to Figure 3 described. One advantage over the embodiment according to Figure 3 This results from the embodiment according to Figure 4This is because the barrier film 60 is better protected during manufacturing, transport, and installation. Any damage to the barrier film 60 can significantly impair its moisture and gas tightness. Therefore, careful handling and protection of the film are necessary or at least advisable.

[0167] In the based on Figure 5 In the illustrated embodiment, the profile element is arranged within the space between the panes 26 such that its recesses 42 face the space between the panes 26.

[0168] Even in the embodiment according to Figure 5 The profile element 30 is designed as a box-like base body 36, with perforations 45 also provided on the inside 44 of the profile element 30 to allow gas exchange between the desiccant contained in the profile element 30 and the space between the panes 26.

[0169] The barrier film 60 is provided on the outer surface 43 of the profile element 30, preferably laminated onto it, and extends with a first film edge 62 to or into a second bonding element 50, which is arranged between the third bonding surface 34 of the profile element 30 and the first pane element 20. A second film edge 64 of the barrier film 60 extends to or into a third bonding element 52, which is provided between a fourth bonding surface 35 and the second pane element 22. This embodiment, as well as the embodiments according to Figure 3 or Figure 4 , the first foil edge 62 and the second foil edge 64 are not in direct contact with the associated first pane element 20 or second pane element 22, but are spaced apart from it with a distance a 1 or a 2, in order to avoid a direct thermal bridge between barrier foil 60 and first pane element 20 or second pane element 22.

[0170] The first bonding agent 40, which is also a two-component (meth)acrylate adhesive, is introduced between a first bonding surface 32, which is formed in a recess 42 and the first disk element 20 or the second bonding surface 33, which is also formed in a recess 42, and the second disk element 22 to form a shear-resistant connection.

[0171] Regarding the manufacturing process, the embodiment according to Figure 5 The modification is such that the first bonding agent 40 is applied to the first pane element 20 or the second pane element 22 and / or the profile element 30 before the insulating glass unit is pressed together. The adhesive joint for the first bonding agent 40, formed by the recesses 42, is therefore oriented towards the space between the panes 26.

[0172] The bonding process can be integrated even better into the manufacturing process if it is appropriately designed.

[0173] The present invention makes it possible to save on stiffening materials in the manufacture of an insulating glass unit and to further improve thermal insulation, so that heating or cooling energy can also be saved in the temperature control of a building. Reference symbol list

[0174] 10 Composite element 10' Composite element 20 First pane element 22 Second pane element 24 Third pane element 26 Space between panes 30 Profile element 32 First bonding surface 33 Second bonding surface 34 Third bonding surface 35 Fourth bonding surface 36 Base body 37 Cavity 38 First web 39 Second web 40 First bonding element 42 Recess 43 Outer surface 44 Inner surface 45 Perforations 50 Second bonding element 52 Third bonding element 60 Barrier film 62 First film edge 64 Second film edge 100 Insulating glass pane x Joint height y Joint width Examples of the first bonding agent

[0175] The following describes exemplary embodiments of the two-component (meth)acrylate adhesive for the first bonding agent, which reveal its production and show its essential properties. Monomers used

[0176] Table 1: A B Monomers used. 1 < Monomer according to the present invention. 2 < Monomer according to the present invention. abbreviation structure Name / Trade name GLYFOMA 1 VISIOMER ®< GLYFOMA (Evonik) MMA Methyl methacrylate BNMA 1 Benzyl methacrylate THFMA 1 Tetrahydrofurfuryl methacrylate IBOMA Isobornyl methacrylate LATEMA 2< Lauryl tetradecyl methacrylate (Houchi Chemicals) M131 MIRAMER®< M131 (Miwon); Isodecyl methacrylate M193 MIRAMER®< M193 (Miwon); Methoxy PEG600 Methacrylate M1053 MIRAMER ®< M1053 (Miwon); LAMA Lauryl methacrylate STEMA 2< Stearyl methacrylate HEMA 1 Hydroxyethyl methacrylate Production of an elastomer C

[0177] The elastomer C1 The product was prepared as follows: 849 g of polyoxypropylene diol (Acclaim® < 4200 N, Bayer MaterialScience; OH number 28.5 KOH / g) and 101 g of 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (= isophorone diisocyanate or IPDI; Desmodur® < I, Bayer MaterialScience) were reacted at 60 °C to form an isocyanate-terminated polyurethane polymer with a titrimetrically determined content of 1.88 wt% free isocyanate groups. Subsequently, 10 g of hydroxyethyl methacrylate (HEMA) were added, which reacted with the free isocyanate groups to form the elastomer. C1 reacts to formula (I). Production of the compositions

[0178] The following compositions were produced: Each component was to be tested. K1The components listed in Tables 2 and 3 were mixed and stirred together in the specified quantities in a dissolver at a maximum temperature of 80 °C until a macroscopically homogeneous paste was obtained.

[0179] As a component K2 46.5 wt% dibenzoyl peroxide (20%) in plasticizer, 50 wt% chalk, 3 wt% thixotropic agent, and 0.5 wt% of a pigment were mixed together in a dissolver. This component K2 The same was applied to all trials with the respective component. K1 used from Tables 2 and 3.

[0180] The manufactured components K1 and K2 were filled into the separate chambers of coaxial cartridges and used in a volume ratio K1 : K2 deployed at a ratio of 10:1.

[0181] Additionally, a commercial two-component (meth)acrylate adhesive of the state of the art, SikaFast ®< -5211 (Sika Switzerland), was tested in the same way for comparison. Description of the test methods

[0182] The Tensile strength (Tensile Strength, "TS") and the Elongation at break Elongation at Break (Elong.) was determined according to DIN EN 53504 (tensile speed: 200 mm / min) on films with a thickness of 2 mm, which were cured for 7 days under standard climate conditions (23 ± 1 °C, 50 ± 5% relative humidity). Measurements were taken on specimens stored at room temperature (RT) and on specimens of the same composition that, after curing, were stored at -20 °C for 24 hours and measured directly from the cold storage (-20 °C).

[0183] Elongation at break is a direct measure of the elasticity of a measured specimen. Specimens exhibiting an elongation at break of at least 100% in the "RT" measurement and simultaneously showing an elongation at break of at least 20% in the "-20" measurement are considered suitable as a first bonding agent according to the invention. The results of the elongation at break measurements are summarized in Table 4. Table 2: K1 E1 E2 K1 R1 R6 K1. 1< tert Inventive components ( to ) and reference components ( to ). All figures in weight percent, based on the respective component 2,6-Di-butyl-p-cresol; 2< Kane Ace ™< B382 (Kaneka); 3< Socal ®< U1S2 (Solvay); 4< N,N-Bis-(2-Hydroxyethyl)-para-Toluidine. Example R1 E1 R2 R3 R4 R5 R6 E2 GLYFOMA 50 35 35 35 35 - - - LATEMA - 15 - - - 15 - 15 MMA - - - - - 35 - - BNMA - - - - - - 50 35 M131 - - 15 - - - - - M193 - - - 15 - - - - M1053 - - - - 15 - - - Inhibitor 1< 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Elastomer C1 15 15 15 15 15 15 15 15 Core Shell 2< 15 15 15 15 15 15 15 15 Filler 3< 18.97 18.97 18.97 18.97 18.97 18.97 18.97 18.97 Activator 4< 0.98 0.98 0.98 0.98 0.98 0.98 0.98 0.98 Table 3: K1 E3 E5 K1 R7 R11 K1. tert Inventive components ( to ) and reference components ( to ). All figures in weight percent, based on the respective component: 1 < 2,6-Di-butyl-p-cresol; 2 < Kane Ace™ < B382 (Kaneka); 3 < Socal® < U1S2 (Solvay); 4 < N,N-Bis-(2-Hydroxyethyl)-para-toluidine. Example R7 E3 R8 R9 R10 E4 R11 E5 GLYFOMA - - - - - - 35 35 LATEMA - 15 - 15 - 15 - - THFMA 50 35 - - - - - - IBOMA - - 50 35 - - - - HEMA - - - - 50 35 - - STEMA - - - - - - - 15 LAMA - - - - - - 15 - Inhibitor 1< 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Elastomer C1 15 15 15 15 15 15 15 15 Core Shell 2< 15 15 15 15 15 15 15 15 Filler 3< 18.97 18.97 18.97 18.97 18.97 18.97 18.97 18.97 Activator 4< 0.98 0.98 0.98 0.98 0.98 0.98 0.98 0.98 Table 4: Measurements of elongation at break at room temperature (RT, 23°C) and at -20°C (-20) of all prepared compositions. "n / m" means that the sample was so brittle that no measurement was possible. Example R1 E1 R2 R3 R4 R5 R6 E2 Elong. (RT) [%] n / m 153 186 208 61 300 260 380 Elong. (-20) [%] n / m 40 5 7 11 4 3 26 TS (RT) [MPa] n / m 7.3 7.8 5.7 7.6 10 8.2 4.8 TS (-20) [MPa] n / m 15 17 13 17 23 21 14 Example R7 E3 R8 R9 R10 E4 R11 E5 Elong. (RT) [%] 290 375 n / m 1.2 50 124 209 193 Elong. (-20) [%] 3 50 n / m n / m 5 36 13 26 TS (RT) [MPa] 8.6 5.6 n / m 5.4 12 7.1 6.1 7.2 TS (-20) [MPa] 21 14 n / m n / m 18 14 13 15

[0184] The (meth)acrylate adhesive SikaFast ®< -5211 of the state of the art (in particular WO 2014 / 184256 A1) was tested in an identical manner and achieved the following results: Elong. (RT) [%] 250 Elong. (-20) [%] 13 TS (RT) [MPa] 12 TS (-20) [MPa] 29

[0185] The results in Table 4 show that only the two-component (meth)acrylate adhesives meet the conditions defined according to the claim with regard to monomers. A and B to sufficient elasticity at room temperature and simultaneously sufficient low-temperature elasticity to be suitable as a first bonding agent according to the invention. Furthermore, the two-component (meth)acrylate adhesives according to the invention also exhibit significantly improved elastic properties at low temperatures compared to the prior art (meth)acrylate adhesive SikaFast® < -5211. Aspects

[0186] Further aspects of the present invention are: 1. Composite element (10), in particular a composite element (10) for an insulating glass unit, comprising at least a first pane element (20) and at least a second pane element (22) as well as at least a first profile element (30), wherein the profile element (30) has at least a first bonding surface (32) and / or at least a second bonding surface (33), wherein the first and / or the second bonding surface (32, 33) is provided and configured for the application and / or reception of a first bonding agent (40),wherein a third connecting surface (34) for applying and / or receiving a second bonding agent (50) is provided adjacent to the first connecting surface (32) and / or a fourth connecting surface (35) for applying and / or receiving a second bonding agent (50) is provided adjacent to the second connecting surface (33) and wherein the first disc element (20) and the second disc element (22) can be connected or are connected by means of the profile element (30) and the first bonding agent (40) and / or the second bonding agent (50), wherein the first bonding agent (40) is a two-component (meth)acrylate adhesive, characterized in that the two-component (meth)acrylate adhesive comprises: a component , K1, comprising a) at least one monomer A according to formula (Illa), where R1< represents either a hydrogen atom or a methyl group, preferably a methyl group; R2< represents either a linear or branched hydroxyalkyl group with 2 to 6 carbon atoms or a residue with 4 to 8 carbon atoms comprising either a phenyl group or an aliphatic 5- or 6-membered ring with at least one ether oxygen in the ring structure; b) at least one monomer B according to formula (IIIb), where R3< represents either a hydrogen atom or a methyl group, preferably a methyl group; R4< represents a linear alkyl group with more than 12 carbon atoms in the chain and preferably at most 20 carbon atoms in the chain; c) preferably between 10 wt.% and 20 wt.%, based on component K1, at least one elastomer C the formula (I), wherein R represents either a hydrogen atom or a methyl group; X represents a polymeric polyol after removal of two OH groups; and Y represents O or NR", wherein R represents a hydrocarbon residue or a hydrogen atom, preferably a hydrogen atom; and d) preferably at least one additive selected from the group consisting of core-shell polymer, radical curing activator, radical curing inhibitor, filler, and adhesion promoter; with the proviso that component K1 between 25 wt.% and 75 wt.%, preferably between 40 wt.% and 60 wt.%, based on component K1, of the mixture of monomer A and monomer B contains, and with the stipulation that the mass ratio of monomer A to monomer B in component K1 between 1:1 and 9:1, preferably between 6:4 and 8:2; and a component K2,comprising at least one radical curing initiator. 2. Composite element (10) according to claim 1, characterized in that R 2< represents a hydroxyethyl group or a benzyl group or at least one of the groups (IVa) to (IVc) in formula (IV), wherein the dashed lines in shapes (IV) represent the bond between the oxygen atom and R 2<. 3. Composite element (10) according to claim 1 or 2, characterized in that the elastomer C a polyurethane(meth)acrylate, in particular producible from the reaction of at least one diol D, in particular a polyoxypropylene diol, comprising at least one diisocyanate and a (meth)acrylic acid ester having a hydroxyl group, wherein the diol Dwith a diisocyanate, in particular isophorone diisocyanate, which is present in stoichiometric excess; and the resulting isocyanate-terminated polyurethane with the (meth)acrylic acid ester, which has a hydroxyl group, in particular with a hydroxyalkyl(meth)acrylate, preferably with hydroxyethyl acrylate (HEA) or hydroxyethyl methacrylate (HEMA) to form the elastomer Cthe formula (I) is implemented. 4. Composite element (10) according to one of the preceding claims, characterized in that the second bonding agent (50) is at least partially polyisobutylene (PIB) and / or comprises. 5. Composite element (10) according to one of the preceding claims, characterized in that the first and / or the second bonding surface (32, 33) is at least partially formed as a recess, in particular as a recess (42) which is such that it is recessed relative to the third and / or fourth bonding surface (34, 35), in particular with respect to the bearing surface on the first or second disc element (20, 22). 6. Composite element (10) according to one of the preceding claims, characterized in that the profile element (30) has a box-shaped base body (36) with respect to its cross-section. 7. Composite element (10) according to claim 6, characterized in thatthat the base body (36) is at least partially hollow inside or has and / or forms a cavity (37), wherein, for example, the cavity (37) is at least partially permeable and / or perforated, and wherein, for example, the cavity (37) is at least partially filled with a hygroscopic material. 8. Composite element (10) according to claim 6 or 7, characterized in that a first web (38) and / or a second web (39) is formed on the base body (36), wherein at least one side wall of the first web (38) forms at least partially the first connecting surface (32) and / or wherein at least one side wall of the second web (39) forms at least partially the second connecting surface (33). 9. Composite element (10) according to one of the preceding claims, characterized in thatthat the first pane element (20) and the second pane element (22) consist at least partially of glass and the profile element (30) consist at least partially of glass fiber reinforced material, in particular at least partially of glass fiber composite material, preferably at least partially of glass fiber reinforced plastic. 10. Insulating glass pane (100) with at least one composite element (10) according to any one of claims 1 to 9. 11. Window with at least one composite element (10) according to any one of claims 1 to 9 and / or with at least one insulating glass pane according to claim 10. 12. Door with at least one composite element (10) according to any one of claims 1 to 9 and / or with at least one insulating glass pane according to claim 10. 13. Method for manufacturing a composite element (10), in particular a composite element (10) for an insulating glass pane,wherein at least one first disc element (20) and at least one second disc element (22) and at least one first profile element (30) are joined together by gluing, wherein the profile element (30) has at least one first joining surface (32) and / or at least one second joining surface (33), wherein the first and / or the second joining surface (32, 33) is provided and configured for the application and / or receiving of a first bonding agent (40),wherein a third bonding surface (34) for applying and / or receiving a second bonding element (50) is provided adjacent to the first bonding surface (32) and / or a fourth bonding surface (35) for applying and / or receiving a second bonding element (50) is provided adjacent to the second bonding surface (33), and wherein the first pane element (20) and the second pane element (22) are joined by means of the profile element (30) and the first bonding element (40) and optionally the second bonding element (50), wherein the composite element (10) has the features according to any one of claims 1 to 9. 14. Method for manufacturing an insulating glass pane (100) wherein at least one composite element according to any one of claims 1 to 9 or a composite element (10) obtained by the method according to claim 13 is used. Reference symbol list

[0187] 10 Composite element 20 first disc element 22 second disc element 26 disc gap 30 Profile element 32 First connecting surface 33 Second connecting surface 34 Third connecting surface 35 Fourth connecting surface 36 Base body 37 Cavity 38 First web 39 Second web 40 first bonding agent 42 groove-like recess 43 outside 44 inside 50 second binding agent 52 third binding agent 60 Barrier film 62 First film edge 64 Second film edge

Claims

1. Composite element (10), in particular a composite element (10) for an insulating glass unit, comprising at least a first pane element (20), at least a second pane element (22) and a space between the panes (26) formed between the first pane element (20) and the second pane element (22), and at least one profile element (30), wherein the profile element (30) has an outer surface (43) facing away from the space between the panes (26) and an inner surface (44) facing the space between the panes (26), and wherein the profile element (30) has at least a first connecting surface (32) and at least a second connecting surface (33), wherein a first connecting means (40) is provided on the first and on the second connecting surface (32, 33), wherein the profile element (30) further comprises a third connecting surface (34) adjacent to the first connecting surface (32), on which a second connecting means (50) is provided.and adjacent to the second connecting surface (33) has a fourth connecting surface (35) on which a third connecting element (52) is provided, and wherein the first disc element (20) and the second disc element (22) are connected in a shear-resistant manner by means of the profile element (30) and the first connecting element (40) and the second connecting element (50) and the third connecting element (52), wherein the first connecting element (40) is a two-component (meth)acrylate adhesive, , characterized by the fact thata barrier film (60) is provided which is attached to the profile element (30) and extends between the second connector (50) and the third connector (52) such that a first film edge (62) of the barrier film (60) is received on or in the second connector (50) and a second film edge (64) of the barrier film (60) is received on or in the third connector (52), and thus the barrier film (60) is formed and arranged to seal the space between the panes (26) against gas loss.

2. Composite element (10) according to claim 1, characterized by the fact that The two-component (meth)acrylate adhesive comprises: one component K1, comprising a) at least one monomer A according to formula (Illa), where R 1 either represents a hydrogen atom or a methyl group, preferably a methyl group; R 2either represents a linear or branched hydroxyalkyl group with 2 to 6 carbon atoms or represents a residue with 4 to 8 carbon atoms comprising either a phenyl group or an aliphatic 5- or 6-membered ring with at least one ether oxygen in the ring structure; b) at least one monomer B according to formula (IIIb), where R 3 either represents a hydrogen atom or a methyl group, preferably a methyl group; R 4 for a linear alkyl group with more than 12 carbon atoms in the chain and preferably at most 20 carbon atoms in the chain; c) preferably between 10 wt.% and 20 wt.%, based on component K1, at least one elastomer C of formula (I), wherein R represents either a hydrogen atom or a methyl group; X represents a polymeric polyol after removal of two OH groups; and Y represents O or NR", wherein R represents a hydrocarbon residue or a hydrogen atom, preferably a hydrogen atom; and d) preferably at least one additive selected from the group consisting of core-shell polymer, radical curing activator, radical curing inhibitor, filler, and adhesion promoter; with the proviso that component K1 between 25 wt.% and 75 wt.%, preferably between 40 wt.% and 60 wt.%, based on component K1, of the mixture of monomer A and monomer B contains, and with the stipulation that the mass ratio of monomer A to monomer B in component K1 between 1:1 and 9:1, preferably between 6:4 and 8:2; and a component K2,comprehensively at least one initiator of radical hardening.

3. Composite element (10) according to claim 1 or 2, characterized by , characterized by the fact that R 2 for a hydroxyethyl group or for a benzyl group or for at least one of the groups (IVa) to (IVc) in formula (IV), where the dashed lines in shapes (IV) represent the bond between the oxygen atom and R 2 represent.

4. Composite element (10) according to one of claims 1 to 3, characterized by the fact that the elastomer C a polyurethane(meth)acrylate, in particular producible from the reaction of at least one diol D, in particular a polyoxypropylene diol, comprising at least one diisocyanate and a (meth)acrylic acid ester having a hydroxyl group, wherein - the diol Dwith a diisocyanate, in particular isophorone diisocyanate, which is present in stoichiometric excess; - and the resulting isocyanate-terminated polyurethane with the (meth)acrylic acid ester, which has a hydroxyl group, in particular with a hydroxyalkyl(meth)acrylate, preferably with hydroxyethyl acrylate (HEA) or hydroxyethyl methacrylate (HEMA) to form the elastomer C is implemented in formula (I).

5. Composite element (10) according to one of the preceding claims, characterized by the fact that the second bonding agent (50) is at least partially polyisobutylene (PIB) and / or comprises.

6. Composite element (10) according to one of claims 1 to 5, characterized by the fact thatthe first foil edge (62) of the barrier foil (60) is arranged in the second bonding agent (50) such that a distance a1 remains between the first foil edge (62) of the barrier foil and the first disc element (20) and / or that the second foil edge (64) of the barrier foil (60) is arranged on or in the third bonding agent (52) such that a distance a2 remains between the second foil edge (64) and the second disc element (22).

7. Composite element (10) according to one of claims 1 to 6, characterized by the fact that the profile element (30) made of a glass fiber reinforced plastic (e.g. BASF Ultradur) ® GF50) is trained.

8. Composite element (10) according to one of claims 1 to 7, characterized by the fact that the barrier film (60) is laminated onto the profile element (30).

9. Composite element (10) according to one of claims 1 to 8, characterized by the fact that the barrier film (60) is embedded in the matrix of the profile element (30).

10. Composite element (10) according to one of claims 1 to 9, characterized by the fact that the profile element (30) has a cavity (37) which is in gas exchange with the space between the discs (26).

11. Composite element (10) according to claim 10, characterized by the fact that a desiccant is arranged in the cavity (37) or the cavity (37) is filled with a desiccant.

12. Composite element (10) according to claim 10 or 11, characterized by the fact that the barrier film (60) is arranged on the outer side (43) of the profile element (30) facing away from the cavity (37).

13. Composite element (10) according to claim 10 or 11, characterized by the fact that the barrier film (60) is arranged on the inside (44) of the profile element (30) facing the cavity (37).

14. Composite element (10) according to one of the preceding claims, characterized by the fact thatthe first and / or the second connecting surface (32, 33) is at least partially formed as a recess, in particular as a recess (42) which is such that it is recessed compared to the third and / or fourth connecting surface (34, 35), in particular with respect to the bearing surface on the first or second disk element (20, 22).

15. Composite element (10) according to claim 14, characterized by the fact that the recess (42) has a width of at least 5 mm, preferably at least 6 mm, and a depth of at least 1.5 mm, preferably at least 2 mm, to ensure an extension of the first connecting element (40) between the first connecting surface (32) and the first disc element (20) and / or the second connecting surface (33) and the second disc element (22) in a width of at least 5 mm, preferably at least 6 mm and in a thickness of at least 1.5 mm, preferably at least 2 mm.

16. Composite element (10) according to one of claims 1 to 15, characterized by the fact that the profile element (30) is positioned between the first disc element (20) and the second disc element (22) such that its outer surface (43) is flush with the first disc element (20) and the second disc element (22).

17. Composite element according to one of claims 1 to 16, characterized by the fact that the profile element (30) is positioned between the first disc element (20) and the second disc element (22) such that the recesses (42) for receiving the first connecting element (40) face away from the disc space (26).

18. Composite element according to one of claims 1 to 16, characterized by the fact that the profile element (30) is positioned between the first disc element (20) and the second disc element (22) such that the groove-like recesses (42) for receiving the first connecting element (40) face the space between the discs (26).

19. Composite element (10) according to one of the preceding claims, characterized by the fact that the profile element (30) has a box-like base body (36) with respect to the cross-section.

20. Insulating glass pane with at least one composite element according to one of claims 1 to 19.

21. Window with at least one composite element according to one of claims 1 to 19.

22. Door with at least one composite element according to one of claims 1 to 19.

23. Method for producing a composite element (10), in particular a composite element (10) for an insulating glass unit, wherein at least one first pane element (20) and at least one second pane element (22) and at least one first profile element (30) are joined together by bonding, wherein the profile element (30) has at least one first bonding surface (32) and / or at least one second bonding surface (33), wherein the first and / or the second bonding surface (32, 33) is provided and configured for the application and / or receiving of a first bonding agent (40),wherein a third connecting surface (34) for applying and / or receiving a second connecting element (50) is provided adjacent to the first connecting surface (32) and / or a fourth connecting surface (35) for applying and / or receiving a third connecting element (52) is provided adjacent to the second connecting surface (33) and wherein the first disc element (20) and the second disc element (22) are connected by means of the profile element (30) and the first connecting element (40) and optionally the second connecting element (50) and third connecting element (52), wherein the composite element (10) has the features according to any one of claims 1 to 19.

24. Method for manufacturing an insulating glass pane (100) wherein at least one composite element according to one of claims 1 to 10 or a composite element (10) obtained by the method according to claim 23 is used.

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