WO2011023683A1

WO2011023683A1 - Method for joining at least two components using a dual-hardening adhesive composition

Info

Publication number: WO2011023683A1
Application number: PCT/EP2010/062312
Authority: WO
Inventors: Hans Luinge; Thomas Meer
Original assignee: Eads Deutschland Gmbh
Priority date: 2009-08-28
Filing date: 2010-08-24
Publication date: 2011-03-03
Also published as: DE102009039029A1; DE102009039029B4

Abstract

The invention relates to a method for joining at least two components using an adhesive composition which is embodied as a one or two-component resin initiator system, in which at least one of the components comprises a light-activatable additive. Said claimed method enables defined joining areas (131, 132) to be activated in a targeted manner which enables, by means of an already activated joining area, a second joining area (133) which has not yet been activated and also not yet hardened to be fixed. The invention also relates to a composite, the first component being a structural component of an aircraft and the second component being a maintaining arrangement for cables, pipes or insulating materials, and the adhesive composition being based on a polyurethane and/or silane-modified polymer having an acrylate additive which can be activated by electromagnetic radiation.

Description

A method of joining at least two components using a dual-curing adhesive composition

Related applications

The present application claims the priority of the German

Patent Application No. 10 2009 039 029.4 filed on Aug. 28, 2009, the contents of which are incorporated herein by reference.

Field of the invention

The invention relates to a method for joining at least one first component with at least one second component with an activatable

Adhesive composition. Furthermore, the invention relates to a composite comprising at least two components as well as an aircraft, in which said composite is used.

Technological background

In particular, in aircraft construction, holder devices that are suitable for holding insulation materials, electrical cables or hoses are often connected to components such as aircraft structural components. For the connection between the two components usually mechanical fasteners such as screws or rivets are used. For attachment

On the other hand, structural components that are made of fiber composite materials are more likely to be adhesive compounds because screw or rivet holes destroy carbon structural component fibers, thereby extremely degrading the mechanical properties of the fiber reinforced plastics. Furthermore, when drilling glass fiber or carbon reinforced plastics, dust and waste, which are to be avoided since carbon powder can cause corrosion on aluminum parts. This is particularly disadvantageous for load-bearing structural components that have to withstand high load standards.

Furthermore, the use of metallic connecting parts such as

Screws and rivets associated with a higher weight, than at

Adhesive connections is the case. However, gluing requires

Plastic holders on components that have fiber composite material, a complex adhesive technology. The workers need to attach

Holds enough time to position, attach and align the brackets. For this reason, the curing times of the adhesives used are relatively slow and curing usually takes several hours to days. In order to accelerate the final curing, heat-curing adhesives are sometimes used, which must be spent consuming in an oven.

In order to transport the composite in an oven or perform other processing steps, a fixation of the components is necessary. As long as the necessary initial strength of the adhesive composition is not reached, therefore, a fixing step is necessary to allow handling, transport or further processing of the joined assemblies. The fixation prevents the holding devices from falling down and it may be necessary to comply with a defined joining pressure with elaborate device technology. In this case, the high device complexity for fixing itself can prevent further processing steps or transportation. Furthermore, it is disadvantageous that a large number of tools and fixing devices are needed, which generates additional production costs. In the prior art further heat curing adhesives are used, for example, at 80-100 ⁰ C to cure. For this purpose, an apparatus for

Heating, such as a stove, and a large amount of energy required. A

Fixing means are needed in this case so that the components to be connected do not come loose when they are put in the oven.

From DE 10 2007 000 862 an adhesive method for bonding a first and a second material is known, wherein induction heat is generated, which is used to activate an adhesive material. In this case, the induction heat can be generated for example by medium-frequency radiation. By the

Activation of the adhesive material shortens the amount of time required to bond the first material to the second material.

Furthermore, in the prior art adhesives are known which are very short

Fixing have such as acrylate adhesives that can be activated by UV radiation. However, these are often not resistant to aging and may not have as good fatigue properties, such as those of two-part adhesives, such as polyurethane adhesives. Latter

On the other hand, two-component adhesives as well as one-component adhesives require longer curing times before they allow further handling.

There are also problems with UV-blocking sub-types; Hardening is possible here only in the border area. Furthermore, the robustness and reliability of UV curing systems is lower over room temperature curing systems. It is therefore necessary to produce or use faster curing one- or two-component adhesives in which the technological waiting times are significantly reduced until further handling, so that the required

Device requirements for fixation can be avoided or significantly reduced. Thus, an adhesive composition is needed that will last a long time

Curing time for handling and processing steps allows, wherein the components to be joined should be fixed in a desired position and can quickly benefit from an initial strength of the adhesive.

Summary of the invention

It is an object of the invention to provide a method for joining at least two components by means of adhesive bonding, in which the use of a long processable adhesive is combined with the use of a fast handling adhesive.

It is another object of the present invention to provide a composite

to provide, which can be produced by means of said method.

This object is achieved by a method for joining and a composite of at least one first component having at least one second component by an electromagnetic radiation activatable adhesive material according to the independent claims, wherein further developments are embodied in corresponding dependent claims. According to a first aspect of the present invention, a method is provided for joining at least one first component with at least one second component, comprising the following method steps: application of an electromagnetic radiation activatable and at least first and second reaction characteristic adhesive composition on at least one surface of the first component; Contacting the

applied adhesive composition having at least one surface of the second component; Activation of the adhesive composition in a first joining region by the first irradiation characteristic, wherein the first joining region is activated faster than a second joining region, in order to fix the at least two components to be handled over the first joining region for handling until complete curing of the second joining region.

In this way, in an adhesive composition, the benefits of a longer curing adhesive can be combined with the advantages of a rapidly activatable adhesive. Advantages of a slow-curing adhesive for a non-critical storage and on the other hand a high reliability that the adhesive composition completely cures. Advantages of the adhesives, which can be activated quickly by electromagnetic radiation and in particular by light, are a very fast curing time after the targeted activation by light and a high storage stability. Furthermore, the very rapid activation requires, for example, by UV irradiation only a small activation energy and can be made at any time.

For rapid curing, the adhesive composition of the

According to the invention, an additive with so-called photoinitiators, that is, a substance activatable by light. Based on the photoinitiators, the Adhesive composition radiation-curable. In the simplest embodiment, this additive may be added to a one-part adhesive or chemically bonded in the adhesive composition. As a result, the polymer is sensitized to electromagnetic radiation. By targeted exposure to a specific radiation wavelength or range, the polymers can be activated for crosslinking. For example, UVA radiation or short-wave visible light or electron radiation is suitable for irradiation. Suitable photoinitiators are all compounds which, upon irradiation with the appropriate wavelength range of light, can pass into an excited state by being able to react with the crosslinkable compounds. As a chemical base for radiation-curing adhesives are known for radical mechanisms, in particular acrylates and cationic reaction mechanisms, for example, epoxy adhesives.

In the non-electromagnetic radiation such as light or UV radiation activated area, the adhesive composition of a two-component adhesive, for example, due to a chemical reaction between resin monomers and hardener can be cured by polymers are built up, for example by polyaddition. The adhesive, which cures slowly - under several hours to days - can harden under the same ambient conditions or by changing the ambient conditions, for example by excluding atmospheric oxygen.

By activating only a limited joint area by electromagnetic radiation, further handling for processing steps of the two components to be joined can be made possible until the second joint area has completely hardened. By this first fixation, the components to be joined in the desired Position can be positioned so that can be dispensed with elaborate fixation devices. Thus, an immediate handling of the module is possible and also a transport. Furthermore, small forces can act on the second component, without the composite dissolves. Compared to usual welding, riveting or

Screw connections are advantageous for the same function and strength

Weight savings achieved by waiving components.

According to the method of the invention, effort, time and costs can be saved by the number of tools can be reduced and the time of the manufacturing process can be significantly shortened, in particular by the fact that the fixing time can be reduced from several hours to a few seconds.

According to a further exemplary embodiment of the invention, the bonding method comprises the step of bringing the applied layers into contact

Adhesive composition such that the adhesive composition in the first joining region extends further than a surface of the second component such that the second component does not shade this first joining region upon irradiation.

By bringing together or bringing into contact of the two components, for example, the adhesive is pressed out on at least one edge surface of the second component. This results in an adhesive area that is freely accessible, that is covered by neither the first nor the second component. As a result, at least one joint for electromagnetic radiation is freely accessible. This edge or joint seam can be activated for example by UV light, while the adhesive in the shaded areas much later by a another mechanism that polymerizes slower than the UV activation polymerized.

The fast-curing edge seam can be used to transfer forces that occur during further machining processes, such as transport. The

Edge areas are designed so that they can absorb the forces occurring. However, the forces during processing steps must not be greater than the initial strength, which is achieved after activation by electromagnetic radiation. In other words, by quick activation of the

Edge areas reached initial strength usually withstand only certain loads. However, this initial strength is usually sufficient to certain

Machine steps or transport or processing steps to perform.

Furthermore, a fixation with other devices is no longer necessary and the processing or fixing time is reduced considerably. The person skilled in the art can ascertain on the basis of simple preliminary tests how great an initial strength and activated joining seam surface must be in the individual case of the type and material of the components that the components do not change their predetermined position during transport.

According to a further embodiment of the invention, the

Joining method after applying the adhesive composition the

A method step, the at least two components in contact bring, so that the adhesive composition further than all sides of the surface of the second component extend such that the second component does not shade this first joining region in an irradiation.

In this way, a circumferential around the second component uniform

Edge seam made of adhesive. This joint seam area can be without Shading simply be irradiated by electromagnetic radiation to cure this area faster.

During irradiation, it should be noted that the light intensity decreases as the light or the electromagnetic radiation penetrates the adhesive. For this reason, the thickness of the adhesive layer must be chosen so that the

Light decrease in the adhesive layer is not too large. typical

Penetration depths with UV irradiation are absent for adhesives

Excipient additions 3 - 4 mm. In the adhesive areas, which can no longer be irradiated, radiation curing can not be initiated. These so-called shadow areas are then cured as it is the second

Curing mechanism according to the second reaction characteristic of the adhesive composition provides. In this way, the joint seams can be selectively activated by radiation in order to achieve a very rapid initial strength and fixation of the components, while the areal greater proportion of

Adhesive composition is in the shadow area and still for more

Processing steps in the uncured state is available.

The radiation-curable adhesive composition may be used in addition to

photopolymerizable materials contain other ingredients commonly used in adhesive technology. For example, additives such as

Stabilizers, dyes, pigments, fillers, sensitizers to increase the light output or auxiliaries that are required to reduce the fire smoke toxicity added. Furthermore, elastomers that may affect the mechanical properties may be part of the adhesive composition. Some adjuvants can also be used to allow the irradiation only in a certain area, so for example visible light non-transparent auxiliary materials are used, but are transparent to UV light irradiation.

Furthermore, it is possible not only to make the adhesive composition transparent to a particular radiation area, but also the first or second component. For example, to allow a greater depth of cure in the adhesive edge to below the second component, a radiation-transmissive edge of the second component could increase the curing area of Randseiten seam.

According to a further embodiment of the invention, prior to application of the adhesive composition, the method comprises mixing a first and a second previously spatially separated adhesive component into a two-component activatable by electromagnetic radiation

Adhesive composition.

In this way, the adhesive composition can be formed as a two-component reaction resin system with a resin component and a hardener component, wherein the activatable by electromagnetic radiation additive is contained in at least one of the two components. This two-component adhesive (2K adhesive) has two spatially separated

Preparations used so that they can not react under storage conditions. Before applying the glue, the two

Components mixed together in the correct ratio. With the contact of the two components, the chemical reaction to the adhesive polymer begins. The curing time ranges from several hours to a period of days. This allows a long processing time of the composite, which is already fixed by the UV acti fourth edge regions. Other benefits of using a Two-component adhesives are the non-critical storage properties and high reliability for complete curing.

According to a further embodiment of the invention, wavelength ranges of the electromagnetic radiation are used, which are in the range of visible light of 750 nm up to and including the UV-A radiation.

In this way, wavelengths between 750 nm to 400 nm can be used from the visible light range, wherein in addition the near UV-A radiation range (400-320 nm) can be added. The advantage of this selected wavelength range is that it is harmless to humans in combination with uncritical process behavior under normal lighting conditions during the bonding process. In this way, the joining process can take place in the same room as the light activation of the adhesive. Thus, no special dark rooms or protective devices need to be provided to perform the adhesive activation. The activation step can be adjusted by the skilled person by adjusting the exposure time, the absorbed dose of the lamp used and the wavelength range of the light used to generate enough reactive group for the subsequent rapid curing.

The activation of the adhesive seam, for example, can easily be carried out by a hand-held lamp such as a daylight device by the staff. In order to activate the adhesive composition in the joint areas, it is possible to select the wavelength ranges which are suitable for the selected adhesive with certain photoinitiators. It is known to a person skilled in the art that suitable photoinitiators are selected for each selected light source and vice versa. Furthermore, it is known that the penetration depth of the rays in the to be polymerized composition are directly related to the absorption coefficient and the concentration of the photoinitiator. In order to achieve a desired curing depth of the adhesive or the adhesive edge, the amount of additive and photoinitiators in the inventive

Adjust composition suitable to allow the further processing steps of the uncured joint area.

In another embodiment of the method according to the invention, the at least first component is selected from a material selected from the group consisting of fiber composite materials, phenolic resin compositions, polyvinyl sulfones, polycarbonates and mixtures thereof.

Fiber composite materials in particular are used in structural engineering as structural components. Inside, fiber composite materials with phenolic resin systems are predominantly used as the matrix. For this reason, they come as a main substrate for a possible adhesive connection with a holder in question. The fiber composite materials used must have particular properties in aircraft in terms of strength, fire behavior, toxicology. Further, fiber composite materials are preferably incorporated in aircraft because they are among the lightweight materials that meet the high standards of aviation such as fire regulations and strength. For this example, glass fiber or carbon fiber composites are suitable. In carbonaceous fiber composite materials, it is particularly advantageous to provide an adhesive connection and not as in the past partially usual screw or rivet connection, which can destroy part of the fiber structure. The fiber composite materials mostly used in aircraft are manufactured on the basis of phenol resin or epoxy resin, polyphenylsulfone or polycarbonates. These building materials are also suitable for others

Transport vehicles such as ships, trains or buses.

In a further embodiment of the method according to the invention, the at least second component is selected from materials consisting of a group consisting of polyamides (PA), polyetherimide (PEI), glass fiber composite materials (GRP) and mixtures thereof.

The second component may each comprise one or more materials of the above-mentioned group. In aviation, polyamides (PA), in particular PA 66, are preferred for holder devices. In addition, glass fiber reinforced plastics or thermoplastic materials such as polyetherimide (PEI) can be used. An example of a mixture would be the glass fiber reinforced polyetherimide. Such manufactured plastic holders can be used in aircraft to attach cables, hoses or the like to aircraft structural components.

According to a further embodiment of the method according to the invention, the activatable by electromagnetic radiation additive of

Adhesive composition after a cationic and / or radical

Reaction mechanism polymerized.

The radiation-curable adhesive composition comprises a

electromagnetic radiation activatable additive containing at least one In other words, a photoinitiator and a polymerizable compound comprise a photopolymerizable mass fraction following either a cationic or radical cure mechanism.

In the cationic polymerization of the photoinitiator is designed, a

Photoactivation in a cationic curable resin or cationic

polymerizable monomer to trigger. Cationically activatable adhesive systems are usually based on epoxides. These epoxy-based adhesives have higher resistance to moisture and dry heat than acrylics. Another advantage of cationic polymerization is that there is no oxygen inhibition on the surface. That is, the oxygen does not inhibit the chemical reaction or crosslinking of the adhesive surface. As a result, the open to the outside surfaces are not sticky. However, the surfaces to be bonded must be free from contamination since high pH's greater than 7 can prevent the curing mechanism.

In addition, radically polymerizable compounds for photoactivation of the composition according to the invention can be used. For example, acrylates are known to the person skilled in the art. As a photoinitiators for the radical

Polymerization can be all types of compounds in question, which form free radicals in the corresponding irradiation. As an advantage of these mechanisms are the very high curing rates and a high degree of freedom in the

Formulation. In this way, viscosity, adhesion and mechanical properties can be easily adjusted.

In contrast to the cationic polymerisable adhesives, the

Polymerization reaction inhibited by oxygen. This means that depending on photoactivatable portion, the free adhesive surfaces are not completely cured by the fast reaction mechanism when in contact with oxygen. In this way, the externally open surfaces can remain slightly sticky, but this does not adversely affect the mechanical properties and also depending on the proportion of slower curing and not through

Oxygen-inhibited adhesive portion can be canceled after complete curing of the entire composite.

In a further embodiment of the method according to the invention, the basis of the two-component adhesive composition is selected from the group consisting of epoxides, acrylates, polyurethanes and silane-modified polymers and mixtures thereof.

In this way, two-component adhesive compositions can be used, which are advantageously cold-curing and do not require additional energy to cure. The known polyaddition adhesives which are included in the two-component reaction adhesives include acrylate adhesives such as cyanoacrylate adhesives or methyl methacrylate adhesives.

Furthermore, silane-modified (MS) polymers can be used as the raw material of

Adhesive compositions are used which have the advantage of being UV-stable and solvent-free, have a high temperature resistance and do not shrink when cured. As a result, these materials are universally applicable on MS polymer base.

Furthermore, as a chemical base for a two-component adhesive, for example, called the epoxy resin. The cured adhesive has a very high strength, which is why this type of adhesive often for structural bonding to Example used in vehicle and aircraft construction. Further, for example, polyurethane adhesives are named as two-component adhesives which are widely used in road, rail, air or water transportation.

Polyurethanes can cure by both polycondensation and polyaddition. Polyurethanes and the silane-modified polymers can be used as a flexible adhesive system and thus are easier to use than stiffer adhesive compositions such as epoxies. In addition, more flexible adhesives are suitable for joining complicated shaped surfaces.

Adhesive composition a smaller proportion than the respective first and second component of the adhesive composition.

Since at a high adhesive content of, for example, acrylate for bonding with thermoplastic materials there is a risk of stress cracking, is a lesser proportion of a radically polymerizable acrylate as an additive compared to the remaining portion of the adhesive composition in the use of

advantageous for thermoplastic components. It is to be expected a higher fatigue strength and crack resistance of the composite, when the proportion of acrylate is relatively low, since otherwise thermoplastic substrates, for example

Polycarbonates or polyetherimide could be affected. This means that acrylates are not suitable as the basis of a two-component adhesive, but in particular for the chemical base of the UV-activatable additives, which can make up a smaller mass fraction of the adhesive composition. Due to the lower proportions of the light-curing adhesive additive, the exothermic effect is also unproblematic. Also other disadvantages like that

Stickiness of the surface is prevented by a small proportion by weight of the UV-activatable adhesive. The free-radically activatable additive amount can be added, for example, in amounts of from 0.1 to about 20 percent by weight, based on the total amount of the adhesive mixture.

In a further embodiment of the method according to the invention, the at least first component and / or constituents of the adhesive composition are alkaline and the activatable by electromagnetic radiation additive polymerized by a radical reaction mechanism.

In aircraft construction in particular, auxiliaries are used for fire protection, for toughness or flexibility, some of which are alkaline and thus prevent the use of cationic epoxy-based adhesives. Furthermore, a majority of the substrates used are amine-containing, such as carbonaceous ones

Fiber composites or fiberglass composites. This amine or pH-increasing effect allows only a radical polymerization technique for the radiation-curing additive.

In a further embodiment of the method according to the invention, the basis of the two-component adhesive composition is polyurethane or a silane-modified polymer which comprises an acrylate-activatable by electromagnetic radiation additive. In this way, the advantages of the polyurethanes or silane-modified polymers, that is, the greater flexibility of these two-component adhesives can be exploited. Especially for difficult-to-bond surfaces, such as those in polyamides (PA 66), for example, are just flexible

Adhesive compositions necessary. The additive may comprise acrylate in the preferred adhesive composition. This way can through

Radiation carried out the radical polymerization of the adhesive. Through the use of this reaction does not have to avoid a

Care should be taken to ensure contamination of the substrate surface. In particular, alkaline surfaces can be associated with radical polymerization without hindering the curing mechanism by basic pHs. As in particular in aircraft substrate surfaces made of carbon

Fiber composite materials or glass fiber composites are used which contain amines and thus make the surface alkaline, a radical polymerization mechanism is particularly advantageous in aircraft.

According to a further embodiment of the invention, a composite is provided with at least a first and at least a second component and an adhesive composition.

According to a further embodiment of the invention, the first component is a structural component of an aircraft and the second component is a holder arrangement for cable hoses or insulation materials and the two-component

Adhesive composition is based on a polyurethane and / or silane-modified polymer and comprises an acrylate-activatable by electromagnetic radiation additive. Furthermore, the invention relates to an aircraft with a composite comprising at least two components and an adhesive composition.

It should also be noted that the above features and method steps can also be combined. The combination of the above process steps or features may result in interactive effects and effects that go beyond the individual effects of the respective features, although not explicitly described in detail.

Exemplary embodiments of the invention are described below

With reference to the following drawings.

Brief description of the drawings

Fig. 1 is a schematic view of a first component with a

Application device for an adhesive composition.

Fig. 2 is a schematic view of the application of a through

electromagnetic radiation activatable two-component adhesive on a first component.

Fig. 3 is a schematic view of the assembly of two components by means of adhesive. 4 is a schematic drawing of the activation of the adhesive composition in first and second joining regions by a UV flashlight.

Fig. 5 is a schematic representation of the depth of cure by irradiation in an adhesive composition.

Fig. 6 is a schematic representation of the handling until complete

Curing of the second joining area, which is fixed above the first joining area.

Fig. 7 is a schematic representation of the handling after completion

Curing of the second joining area.

FIG. 8 is a schematic flow diagram of the method of joining at least two components through a photo-curing and at least two

Reaction characteristics adhesive composition.

Detailed description of the drawings

1 shows a schematic side view of a first component 200, which acts as a substrate surface for an adhesive. Furthermore, Fig. 1 shows a

Application device 110 having two separate chambers. In the

Chambers 111 and 112 are each a hardener 102 and a resin 101, wherein the adhesive located in the chamber 111 with a light-curing additive 104 is provided; Alternatively, it is also possible that the additive 104 is introduced in the curing agent (chamber 112). In the mixing area 113 of the

Application device 110, the stored separately for storage two-component adhesives can be mixed together. From the mixing of the two components, the reaction begins the curing of the

Two-component adhesive.

Fig. 2 also shows a side view when applying the

Adhesive composition 100 on the substrate 200. After the two

Adhesive components 101 and 102 have been mixed in the ratio correct for the reaction, the slow-curing two-component adhesive begins to slowly crosslink within a time frame of, for example, hours. This application is very easy and safe to carry out. The glueing

provided first joining surface 210 may optionally be roughened before application. Other pretreatment steps such as treatment with a primer are possible. However, when using silane-modified polymers, it is not necessary to use a primer. Possible adhesion promoters are not shown in FIG. 2.

FIG. 3 shows the contacting of the applied adhesive composition 100 with at least one surface 310 of a further second component 300.

This joining step can be subdivided into two steps, firstly bringing into contact only and secondly applying a slight pressure to the adhesive layer, so that the adhesive composition 100 emerges on all edges of the component 300. In this way, a joining seam is formed (see FIGS. 131, 132, FIG. 4) which is not covered by the component 300 or the substrate 200. In 3, the adhesive composition 100 is still in the non-electromagnetic radiation activated state 100 (To), 130 (To).

4 shows a schematic drawing of the activation of the adhesive composition 100 by a radiation source 400 at the time To. A UV lamp 401 is exemplified. The lamp 401 shown can be easily operated by hand and can selectively irradiate the joint seam areas 131 and 132, so that the joining seam areas 131 (To) and 132 (To) shown with black circles are activated. In the example shown, the component is not permeable to UV, so that irradiation above the component is possible, whereby the component, owing to the UV-impermeability, ensures that only the

Edge spreading areas are light-cured. Due to the fast activation of the

Joining areas 131, 123 In a few seconds, the composite can be handled immediately for further processing steps. The handling of the two components 200 and 300 to be joined is thus made possible by fixing the edge seam or the green strength of the edge seam until the second joining region 133 lying in the shadow cures.

FIG. 5 shows a schematic illustration of the hardening depth 140 by means of

Irradiation 400. The unirradiated area is exemplified by area 150 and exemplifies a so-called shadow area where no radiation activation occurs. The hardening depth is usually a few millimeters and depends on the amount of added radiation-active additive and other additives used.

6 again shows schematically the composite of two components and the partially activated adhesive at time T ₁ , that is, after the UV Activation. After activation by the UV radiation, the so-called Green Strength or initial strength is reached immediately after a few seconds, so that further processing steps are possible. A fixation by other devices, so that the two components remain at the desired position, this is no longer necessary. Low forces - indicated by the arrow 501 - can act on the second component 300 without destroying the joint connection. In this way, transportation or other processing steps can be performed.

Schematically, a clock is shown representing the time Ti, that is, after about 5 seconds, after the activation step shown in the preceding FIG. 4. This so-called advantageous quick activation or cure on demand can be used to increase the overall production costs

reduce because no fixation of the parts is necessary. In addition, can be dispensed with additional energy that would have been necessary, for example, for a heat curing. Since this two-component adhesive is cold-curing, complete curing without further energy input after several hours can be expected.

FIG. 7 shows schematically the fully cured composite component consisting of the substrate or first component 200 and a further component 300 as well as the adhesive composition. The fully cured joining region 132 (T ₂ ) is illustrated by an oblique hatching in the drawing. By way of example, the clock shows a sequence until the final curing of several hours (T ₂ ), whereby this period (T ₂ ) can also comprise several days. After

complete curing of the composite is also resilient with greater forces, as indicated by the arrow 502. Fig. 8 shows the time course of the inventive method with an adhesive composition having two reaction characteristics. The first step of the method comprises mixing SlO of the two-component

Adhesive composition, so that a reaction for crosslinking is initiated. The next process step comprises applying Si l a

Two-component adhesive, which also includes a radiation-curing additive. This adhesive composition is applied to a surface of a first component, approximately on the order of the second component to be joined. The next step S20 comprises the assembly of the two components.

In order to fix the assembled components for further handling, step 30 is initiated. The step 30 may be started at any arbitrary time and includes activation of the adhesive composition in a first joining region by a first irradiation characteristic. As a result of this irradiation, this first joining region, which may represent, for example, an edge seam, is activated and fixed while the second joining region, which has not yet been activated, is not activated in the shadow. This can be another

Handling S 32 of the component assembly can be made here no tools or other elaborate holding mechanisms must be used here for fixing. The complete curing of the two-component adhesive is in

Period of several hours happened. Only in step S32, the green strength of the two-component adhesive is achieved, whereas the green strength of the UV-curing adhesive is reached after a few seconds in step S31. After the completion of the complete curing of the two-component adhesive, the final strength is achieved in step S40. It should be noted that the term "comprising" further elements or

Does not preclude procedural steps, just as the term "a" and "an" does not preclude several elements and steps. The reference numerals used are for convenience of reference only and are not to be considered as limiting, the scope of the invention being indicated by the claims.

Claims

claims

A method for joining at least one first component (200) with at least one second component (300) comprising:

Applying a by electromagnetic radiation (400) activatable and having at least a first and a second reaction characteristic

Adhesive composition (100) on at least one surface (210) of the first component (200), wherein the first and second reaction characteristics each having a first and a second irradiation characteristic is assigned;

contacting the applied fabric composition (130) with at least one surface (310) of the second component (300);

Activation of the adhesive composition (100) in a first

Joining region (131) by the first irradiation characteristic, wherein the first joining region (131) is activated faster than a second joining region (133) to handle the at least two components to be joined (200, 300) until complete curing of the second joining region (133 ) about the first one

Fixing area (131).

The method of claim 1, wherein the contacting of the applied Klcb & totϊzusammensztzimg (130) is such that they see

Fenggebereich further than a surface (310) of the second component (300) extends such that the second component (300) does not shade this first joining region (131) in an irradiation (400).

3. The method according to claims 1 or 2, wherein the bringing into contact the applied Kiebstoffzusarnmcnsetzung (130) takes place such that the

KJebstüff / usamirstisetzung further than all the ropes of the surface (310) of the second Rough parts (300) extends such that the 7weüc component GOO) this! first joining area (13 1) at an irradiation (400) is not shaded.

4. The method of claim 1, wherein applying the adhesive composition comprises mixing a first and a second spatially separated adhesive component (101, 102) into a two-component activatable by electromagnetic radiation

Adhesive composition (100).

5. The method according to any one of the preceding claims 1 to 4, wherein the

Wavelengths of the electromagnetic radiation in the visible light range from 750 nm up to and including the UV-A radiation.

6. The method of claim 1, wherein the at least first component is selected from a material selected from the group consisting of

Fiber composite materials;

Phenolic resin compositions,

polyphenylsulfone;

polycarbonates; and

Mixtures thereof.

7. The method of claim 1, wherein the at least second component is selected from materials selected from the group consisting of:

polyamides,

polyetherimide;

Glass fiber composite material; and Mixtures thereof.

8. The method according to any one of the preceding claims 1 to 7, wherein the activatable by electromagnetic radiation additive of the adhesive composition according to a cationic and / or radical reaction mechanism polymerized.

9. The method according to any one of claims 4 to 8, wherein the basis of

two-component adhesive composition (100) is selected from the group consisting of:

epoxides;

acrylates;

Polyurethanes;

Silane-modified polymers; and

Mixtures thereof.

10. The method according to any one of the preceding claims 1 to 9, wherein the activatable by electromagnetic radiation additive of the adhesive composition (100) comprises a smaller proportion than the respective first and second components of the adhesive composition (100).

A method according to any of the preceding claims 1 to 10, wherein the at least first member and / or components of the adhesive composition (100) are alkaline and the activatable additive of the adhesive composition (100) polymerizes according to a radical reaction mechanism.

12. The method according to any one of the preceding claims 1 to 11, wherein the two-component adhesive composition (100) on a basis of a Polyurethane and / or a silane-modified polymer by

electro-magnetic radiation activatable additive of acrylate comprises.

Composite comprising at least a first component (200) and at least one second component (300) and an adhesive composition (100) according to

Claims 1 to 12.

14. Composite according to claim 13,

wherein the first component (200) is a structural component of an aircraft; wherein the second component (300) is a holder assembly for cables, hoses or insulation materials; and

wherein the two-component adhesive composition (100) based on a polyurethane and / or silane-modified polymer by a

electromagnetic radiation activatable additive of acrylate comprises.

15. airplane with a composite according to claim 13 and 14.