EP2851478B1 - Sealing strip - Google Patents

Description

The invention relates to a sealing band with a sealing band body made of a resilient flexible foam, wherein the sealing tape has upper and lower broad sides, which can be applied to the opposite joint edges of a sealed construction gap, wherein the sealing band body associated with Dichtbandbreitseiten upper and lower broad sides and these connecting narrow sides, which arranged in Abdichtanordnung the sealing tape interior space and space outside, and on the lower body broadside a self-adhesive layer for attaching the sealing strip is attached to a component, wherein the sealing tape is assembled as a role with several radially superimposed turns and in the turns respectively the lower broad side of Sealing tape body comes with the upper body width for surface contact, wherein on the sealing band body at the upper broad side a cover layer is permanently adhered to the sealing tape with the cover layer of a first wind ung rolled on the self-adhesive layer adjacent to a winding, and wherein the adhesive force of the cover layer against the sealing tape body is greater than the adhesive force of the cover layer against the self-adhesive. Furthermore, the invention relates to a building with the arranged in a joint sealing tape.
Sealing tapes partially or partially used for delayed recovery are completely impregnated, are from the EP 1 600 571 A1 such as EP 688,382 A1 already known. These sealing tapes may have mounting aids such as adhesive tapes for attachment to contact surfaces.

The US 2010/0170186 A1 describes a generic sealing tape for a waterproof barrier layer for installation of windows and doors, wherein the sealing tape on one broadside self-adhesive and on the other broadside has a self-adhesive layer, wherein the sealing tape is made up as a roll. The DE 202012000883 U1 describes a sealing tape, wherein the foam body is impregnated with an impregnate.
The DE 20306687 U1 describes a sealing tape having a tensile reinforcing layer wherein the foam body is impregnated with an impregnate.
The DE 9312987 U1 describes a foam element having a superficial coating suitable for adhesion, which is bonded to the foam by a hot-melt adhesive, and wherein a knitted fabric is placed on the coating side.
A disadvantage of these sealing tapes, however, is that of mounting aids such as adhesive tapes immediately before assembly Abziehlagen or paper strips that are necessary for packaging and storage of the sealing tapes are to be removed in order to expose the respective adhesive surface. This means an additional workload and waste, namely in terms of accruing decals. Furthermore, sealing tapes can be assembled, stored and transported in the simplest and space-saving manner in the compressed and rolled-up state.
Furthermore, the sealing tape properties should as far as possible not change even after long storage, wherein the maximum possible duration of storage is often limited by a deterioration of adhesives contained, for example as a result of separation, exudation or aging thereof, in particular if the adhesives are present in a tack-activated state on the stocked sealing tape ,

Finally, there is a constant need to ensure a safer fit of the respective sealing strip in the joint, especially in joints with not exactly plane-parallel joint edges and / or dynamically loaded joints, as may occur in building joints, if at least one of the joints forming Components is subjected to vibration, for example, due to building vibrations caused by vehicle traffic.

Furthermore, the sealing tape should be produced with little effort and cost.

It is therefore an object of the present invention to provide a sealing tape which is easy and time-saving mounted in a joint with space-saving packaging and at the same time allows a secure fit in the joint even at vibrational stress of the adjacent components to the joint and allows a long storage life and which diverse is variable.

This object is achieved by the provision of a sealing tape according to claim 1. At the upper broad side of the body, a cover layer is attached by means of an adhesive or it is provided as a hardening fluid or pasty coating composition cover layer, and the cover layer is permanently adhered to the body, wherein the sealing tape with the cover layer of a first turn on the self-adhesive layer of an adjacent turn is rolled up and wherein the adhesive force of the cover layer against the body is greater than the adhesive force of the cover layer against the self-adhesive.

Furthermore, the object is achieved by a construction with a sealing tape arranged in a joint according to the invention, wherein the sealing tape with the self-adhesive layer is fastened to a component bounding the joint.

Surprisingly, it has been found that, despite the impregnation, the cover layer can be fixed to the body with sufficient adhesive force with an adhesive, in particular also with a hotmelt adhesive as the adhesive. This is surprising than that the pores of the body are at least partially closed by the impregnation and also by the impregnation an immediate interaction of the adhesive with the webs or walls of the pore structure difficult or prevented. This is especially true if the impregnating agent of the body is based on polymer, in particular based on acrylate and / or methacrylate polymers, which are used in particular as a dispersion of polymer particles. It has also been found that the adhesive force of the cover layer with respect to the impregnated body can be higher than the adhesion of the cover layer to the non-impregnated body, which is achieved in particular by the use of hot melt adhesives as an adhesive, in particular in combination with the use of Impregnating agents based on acrylate and / or methacrylate polymers, in which the said polymers are preferably used as a dispersion of the polymer particles, especially preferred as aqueous dispersions.

If in the context of the invention reference is made to "polymers", these are always organic polymers.

The adhesive force of the cover layer against the body is in this case higher than the adhesive force of the cover layer against the self-adhesive, which may be given, for example, by a suitable choice of the cover layer material and the roughness of the cover layer surface. These requirements are generally met by plastic films. In the case of the sealing strip which has been made up as a roll, the self-adhesive layer can thus come into contact with the covering layer layer of the underlying turn. In the sealing tape according to the invention thus the removal of the cover of the adhesive to expose the self-adhesive surface on the carcass broadside as mounting aid is already done when rolling the sealing tape in one operation. An additional cover layer of the self-adhesive layer to be removed by the customer is thereby unnecessary, so that waste which is produced and disposed of on-site is avoided.

Surprisingly, it has also been found that the self-adhesive on the impregnated body has a higher adhesive force than on the corresponding body without impregnation. As a result, there is thus increased security with regard to a possible separation of the self-adhesive layer from the body. On the one hand, this offers advantages in relation to the sealing strip which is made up as a roll. Thus, for example, this increases the maximum storage life of the sealing strip, which ensures that the cover layer can be more easily separated from the self-adhesive without the latter detaching itself from the upper side of the sealing strip, since with increasing aging of the prefabricated sealing strip also a change in adhesive forces the individual layers can enter each other. Here, the adhesive force of the self-adhesive layer against the sealing band body has as For example, also due to a diffusion of components of the self-adhesive in the body and / or a diffusion of components of the impregnating agent in the self-adhesive layer , The sealing tape according to the invention thus also has an increased storage life.

Due to the comparatively high adhesive force of the self-adhesive on the impregnated sealing tape body, the top layer of the opposite body broad side, which rests flat on the free adhesive side of the self-adhesive layer in rolled-up sealing tape can be varied and varied, since when unrolling the sealing tape and separating the self-adhesive layer from the top layer If necessary, even greater adhesive forces between the cover layer and self-adhesive layer are acceptable, as in the case of a non-impregnated body and thus a lower adhesive force between the self-adhesive layer and the cover layer. In this case, too, it should be taken into account that, given a long storage period and aging of the sealing strip, any change or decrease in the adhesive properties of the self-adhesive layer may occur, for example with regard to adhesion to the body. The cover layer or its surface properties can thus be chosen to be more variable than unimpregnated body and thus low adhesive force of the self-adhesive layer against the cover layer. For example. Under certain circumstances, can be dispensed with a superficial (outside) non-stick coating of the top layer or a cover layer with poorer detachability against the self-adhesive layer are used, as in unimpregnated body, while still a safe separation of self-adhesive layer and cover layer is ensured when rolling the sealing tape. The topsheet may thereby further consist of materials from a wider range.

Due to the comparatively high adhesive force of the self-adhesive on the impregnated sealing tape body, the sealing tape can also be used if in conventional sealing tapes to improve the determination of the sealing strip in the joint itself would be desirable on the opposite Dichtbandbreitseite another adhesive, such as for better attachment of the sealing strip a wall reveal, since sufficient adhesion of the sealing strip is already achieved by the said self-adhesive layer on the component limiting the joint. The range of applications of the sealing tape according to the invention is thereby increased.

Furthermore, by the comparatively high adhesive force of the self-adhesive on the impregnated sealing tape body assembly of a component facilitated with this sealing tape, since a release of the sealing strip of the component, in particular under separation of the body of the self-adhesive layer, is difficult. This can be advantageous in sealing tapes of great weight per unit length (for example with a large sealing strip width and / or a large sealing strip height, in particular in the pre-assembled or only partly restored state before the component is installed with pre-assembled sealing strip). This may also be the case at elevated application temperatures, such as in summer, since elevated temperatures reduce the adhesive or adhesive force of the self-adhesive layer with respect to the body.

The impregnating means of the sealing band body is preferably designed such that it also has one or more properties of the body such as the water vapor diffusion resistance, UV stability, aging resistance, water and / or airtightness and the restoring properties of the body in terms of a delayed recovery of the foam material the body after a compression of the same each increased (or delayed in relation to the provision this), in each case with respect to the non-impregnated body.

Preferably, the impregnation of the foam material is one for the recovery delay of the compressed sealing strip upon release of the compression. For this purpose, the adhesive-active constituents of the impregnating agent can be, for example, plastic resins or polymer particles known per se, in particular organic polymer particles, more preferably acrylate / methacrylate resins or acrylate / methacrylate dispersions, in particular acrylate dispersions. Optionally, other known impregnating agents can be used. The impregnating agents can be used in particular in the form of dispersions, in particular in the form of aqueous dispersions, such as e.g. Acrylate / methacrylate dispersions, optionally dispersions of Poletherglykolen, latex (with natural and / or synthetic rubbers), polychloroprene, butadiene-styrene polymers, etc., possibly also bitumen. Under certain circumstances, other preferably aqueous coating compositions can be used in individual cases. Optionally, the tack-reactive saturant ingredient may also be a renewable (preferably vegetable) component (optionally including derivatives thereof). Acrylate / methacrylate dispersions are particularly preferred, in particular acrylate dispersions, here dispersions of acrylic acid esters. The above-mentioned, each adhesive-active components of the impregnating cause due to their certain adhesive a reset delay at reset release of the compressed sealing tape or body, it is understood that these adhesive-active components so do not harden or set during storage of the sealing tape and also a much lower bond strength as the adhesive of the self-adhesive layer and the adhesive layer for fixing the cover layer to the body.

Optionally, the impregnating agent may also contain a plurality of tack-reactive constituents in combination, preferably at least one component is an acrylate / metharylate polymer, in particular an acrylate polymer, in particular acrylic acid ester. Acrylate / methacrylate polymers, in particular acrylate polymers, such as in particular acrylic acid esters, are preferably present as adhesive active constituents of the impregnating agent with ≥25-50 portions or ≥60-75 portions, more preferably with ≥85-90 portions or with ≥95-98 portions, under certain circumstances even only ≤ 30-45 units or ≤ 20-25 units or, if applicable, ≤ 10-15 or ≤ 5 units (units in each case as parts by weight).

Optionally, the impregnating agent may also contain bitumen or bitumen. According to a particular embodiment, in particular when using acrylate / methacrylate dispersions, in particular acrylate dispersions, the impregnating agent may also be free of bitumen or contain bitumen in only small proportions, for example ≦ 30-40% by weight or ≦ 10-20% by weight. -%, or in particular also ≤ 3-5 wt .-% or ≤ 1-2 wt .-%, based on the content of adhesive active component of the impregnating agent.

Adhesive-active constituents based on or in the form of renewable (preferably vegetable) components may be present as terpenes or polyterpenes, tree rosin esters and / or tree rosin acids, in particular based or in the form of tree rosin acid esters and / or tree rosin acids. The adhesive-active ingredients may in particular be rosin acid ester and / or rosin acid. The esters may in each case be those of monohydric alcohols and / or polyhydric alcohols and / or of alcohol-ether compounds, in particular of polyhydric alcohols such as, for example, dihydric or trihydric alcohols such as glycerol and / or glycol. Optionally, in the impregnating agent, a derivative of a tree resin or a tree resin ester may be obtained, wherein the derivative in particular by one or more steps from the group disproportionation, dimerization, polymerization, hydrogenation, addition of saturated or unsaturated compounds, esterification, transesterification, amidation, salt formation from natural tree resin acid and / or tree rosin ester is obtained. With respect to the derivative ester, it may be one of each of monovalent ones Alcohols and / or polyhydric alcohols and / or alcohol-ether compounds, in particular of mono- or polyhydric alcohols. The polyhydric alcohols may each be, for example, 2- or 3-hydric alcohols such as glycerol and / or glycol.

The expression "≤ x-y" in the context of the invention, wherein x and y are two different numbers, includes the statements "≤ x or ≤ y" regardless of the physical unit (if present). The expression "≥ x-y" in the context of the invention, wherein x and y are two different numbers, includes the statements "≥ x or ≥ y" regardless of the physical unit (if present).

The foam material is preferably impregnated over the entire volume of the sealing band body, in particular homogeneously impregnated over the entire volume of the body.

In a sealing tape according to the invention, the impregnating agent is particularly advantageous for delaying the recovery of the compressed sealing tape, namely based on or containing acrylate polymers and / or methacrylate polymers, including mixtures thereof or acrylate-methacrylate copolymers. The advantages described above arise here in a special way, in particular with regard to increasing the adhesive force of the self-adhesive layer on the body and - independently of this - the adhesive force of the adhesive layer, in particular as a hot melt adhesive layer on the body. Furthermore, this applies with respect to the increase in the life and the other advantages described above. Particularly preferred in relation to the above-mentioned advantages, acrylate polymers have proven particularly useful, especially when used as a dispersion, in particular aqueous dispersion.

The acrylate polymers and / or Methatacrylatpolymere, including mixtures thereof or acrylate-methacrylate copolymers are summarized in the context of the invention also called "acrylate / methacrylate polymers" for short.

The impregnated body of the sealing strip can in particular have an air permeability of ≦ 300-400 l / m ² s or preferably ≦ 200-250 l / m ² s, in particular also ≦ 100-150 l / m ² s or even ≦ 50-75 l / m ² s, in particular when impregnated with an acrylate / metahacrylate polymer dispersion, in particular acrylate dispersion, containing dispersed acrylate / methacrylate polymer particles. Optionally, the air permeability may also be ≦ 40 1 / m ² s or ≦ 25 l / m ² s. It has been found that such acrylate / methacrylate polymer particles can still penetrate sufficiently into the pores of such a soft foam foam tape body, in particular polyurethane foam, over the entire cross section thereof, so that a body with homogeneous impregnation or resorption impregnation over the entire cross section is available or available (it is understood that if necessary, the impregnation of the body can not or not homogeneously over its entire cross section). On the other hand, the adhesive force of the self-adhesive layer and possibly also of the adhesive layer, in particular in the form of a hot-melt adhesive layer, on the body is comparatively high, in contrast to open-cell foams and / or unimpregnated foams. This is attributed - without being limited to this - to the fact that there is less foam material on the body surface with open-pore foams which can form an adhesive bond (but more free pore volume) or an adhesive interaction between self-adhesive or adhesive with the impregnating agent , whereby the adhesive force can be increased.

Generally in the context of the invention, the air permeability can be ≥ 50-75 1 / m ² s or ≥ 100-150 1 / m ² s, or ≥ 200-250 l / m ² s. In general, the air permeability of the body may also ≤ 600-800 l / m ² s or ≤ 1000 1 / m ² s.

Generally in the context of the invention, the specification of the air permeability refers to a determination under the standard conditions of a 10 mm thick piece of foam (fully relaxed) at a measured negative pressure of 0.5 mbar, test area 100cm ² ; Frank device 21443; DIN EN ISO 9237.

At the same time can be significantly improved by the incorporation of the impregnating polymer particles as a dispersion in the foam, the restoring and sealing behavior of the sealing strip. This also relates in particular to the bleeding properties of the built-in sealing tape at elevated temperature and pressure, e.g. at above 40-50 ° C, for example in the range of 40-60 ° C, and at a compression of the sealing tape to ≤ 7-10% or ≤ 5% of its initial height at full free recovery, i. Reset without application of force outside a joint. Such conditions may arise in temperature-induced component movements, for example in summer, when narrowed by the component movements of the sealing strip receiving gap due to the thermal expansion of the components below its nominal width and the sealing strip is thereby undesirably compressed. For example, solvent-impregnating films tend to flow much more strongly and, under the conditions mentioned (eg 50 ° C., degree of compression 5-10% of the strip, ie compared to the height of the strip with completely free return), can already be achieved by the compression from the foam body be pressed out (and on the free outside of the sealing tape to accumulate visible), whereas impregnated impregnating films made of dispersion show this virtually no tendency and thus ensure a long-term stable sealing. This applies in particular to impregnating agents based on or containing acrylate / methacrylate polymers, in particular acrylate polymers.

The dispersions used for impregnation have a Tyndall effect, for example, even when using visible light or light with a wavelength of up to 380 nm, up to 300 nm, up to 250-200 nm or even up to 100 nm.

Furthermore, it has been found that the acrylate / methacrylate polymers, in particular acrylate polymers, preferably used for delayed recovery, reliably effect a delayed recovery over comparatively large temperature ranges, in particular also a return behavior of the sealing tape can be achieved, which changes only comparatively little over a certain temperature range For example, a temperature starting from 20 ° C or 10 ° C as the average temperature (the temperature range for 20 ° C then, for example, ± 10 ° C or ± 5 ° C to said mean temperature be, for 10 ° C then, for example. ± 5 ° C or + 10 ° and -5 ° C and around the stated mean temperature). This may be due to the polar acrylate groups, which appear to result in improved cohesiveness of contacting impregnating film portions to one another and / or improved adhesion to the foam material, e.g., in contrast to impregnating agents such as bitumen or the like.

In addition, it has been shown that the acrylate / methacrylate polymers, in particular acrylate polymers, of the acrylate dispersions preferably used according to the invention have virtually no tendency to migrate or diffuse, which is attributed to the fact that the acrylate polymer particles in themselves but also with the body foam material, in particular polyurethane foam, have very large cohesion / adhesion forces, so that, for example, a diffusion or migration of the impregnating virtually completely omitted, even at temperatures higher than 20 ° C (room temperature), for example at 30-40 ° C or at 50 ° C. This applies to a diffusion in the adjacent component or building surfaces such as natural stone but also in the adhesive layers on the lower and upper broad side of the body, which thus in their properties over long periods such as Months or years are not affected by the impregnating agent, even after long periods of use such as ≥ 3-6 months or ≥ 12-24 months or 3-5 years or beyond, eg not with respect to the adhesive strength to the outside adjacent layer such For example, a self-adhesive layer or hot melt adhesive layer or a component adjacent to the sealing strip or the component otherwise impaired, eg optically.

The polymer particles (particles) of the impregnating agent, in particular the acrylate / methacrylate polymer particles, in particular acrylate polymer particles, particularly preferably have an average diameter in the range from 5 nm to 250 μm or in particular 50 nm to 100 μm, particularly preferably in the range from 100 nm to 25 μm on. It has been found that polymer particles such as, in particular, acrylate / methacrylate polymer particles, in particular acrylate polymer particles, with a small average diameter can penetrate comparatively closed-cell foams, in particular polyurethane foams, particularly well, in order to give homogeneous impregnation over the entire cross section of the sealing strip. This may in particular apply to foams with air permeabilities ≤ 200-300 1 / m ² s or ≤ 100-150 1 / m ² s, in particular at air permeabilities of ≤ 50-75 l / m ² s, but without being limited thereto. This applies in particular to the adhesive-active constituents of the impregnating agent.

Furthermore, the tack-reactive polymer used in the impregnating agent dispersion, in particular polyacrylate / methacrylate, may be or contain a cross-linked polymer. As a result, the flow behavior of the impregnating agent film (as described above) and / or the bond strength and adhesion of the film to the pore walls can be adjusted, as well as the adhesion with an adhesive layer applied to the body.

It has been found in the course of the invention that the adhesion of an adhesive layer to the body is surprisingly increased by the impregnation, for example against a non-impregnated body. This refers to the adhesive force of the adhesive layer, in particular as a hot melt adhesive layer, and in particular the adhesive force of the self-adhesive layer. As a result, the cover layer is more widely adaptable to different requirements, while ensuring a reliable separation of the cover layer of the self-adhesive layer during unwinding of the sealing strip roll, and the storage life of the sealing strip is increased. This particularly relates to the use of acrylate / methacrylate polymers, especially acrylate polymers, as tacky impregnating ingredients but not only to these.

The impregnating agent used can also be described by the adhesive force of an adhesive film produced by drying the polymer dispersion, in particular acrylate / methacrylate dispersion, in the special acrylate dispersion. The adhesive film is obtained by applying the dispersion and drying it, for example at 50 ° C or at 75 ° C with moving air to constant weight. Such a film may have peel adhesion (adhesion) to steel of at least 0.04 to 0.1 N / 25 mm or at least 0.2 to 0.4 N / 25 mm at 23 ° C / 50% relative humidity as determined in a test based on DIN EN 1939: 2003 (D), method 3 (Table 1), except that the adhesive film is pressed through a 5 kg roller and a waiting time between application and test of 10 minutes is maintained. The adhesive layer used is 25 mm wide and 300 mm long. The peeling takes place in a direction perpendicular to the width of the adhesive tape. The peel angle, as defined in DIN EN 1939: 2003 (D), is 180 °. The take-off speed is 300 mm / minute. Preferably, the peel adhesion of the adhesive under the conditions mentioned ≥ 0.6 to 1 N / 25 mm (the bond strength is given in deviation to the DIN based on a width of 25 mm). In this way, a sufficient adhesive effect and thus also restoring delay of the compressed sealing strip is achieved, at the same time also a high adhesive force of the self-adhesive and / or adhesive, in particular hot-melt adhesive achieved. There are no particular limitations to higher values, these are the result of the properties of the polymer particles used, if necessary, the peel adhesion (bond strength) can be ≦ 15-20 N / 25 mm, if necessary ≦ 5-10 N / 25 mm or even ≤ 20-30 N / 25 mm. Such impregnating agents per se are known, for example in the construction or textile sector, for example in nonwoven production. The application in the sealing strip according to the invention is particularly advantageous for the reasons described.

The polymeric constituents of the impregnating agent, in particular acrylate / methacrylic polymer impregnating agent or acrylate impregnating agent, may have an average molecular weight (in each case atomic units) of ≥ 1,000, preferably ≥ 1,500-2,000 or ≥ 2,500-5,000, optionally also ≥ 10,000-20,000, under certain circumstances also ≥ 50,000-100,000 or more. The average molecular weight of the acrylate polymer used can be, for example, ≦ 5,000,000-10,000,000 or ≦ 1,000,000 to 2,000,000, optionally also ≦ 250,000 to 500,000 or ≦ 100,000. It has been found that this causes an increase in the adhesive force of the impregnated body against an adhered to the body adhesive or adhesive layer, for example. Against a hot melt adhesive layer or against a self-adhesive layer. Furthermore, this causes a suitable delayed reset. On the other hand, if the molecular weights are not too high, the polymer particles also have good film-forming properties, so that when dry, the polymer particles crosslink well with one another and "converge". can.

The average degree of polymerisation of the polymeric constituents of the impregnating agent may be ≥ 50-100 or ≥ 200-300 or preferably ≥ 500 monomers, preferably ≦ 500 000 monomers or preferably ≦ 100 000 monomers, preferably in the range from 1000 to 25 000 monomers, without being limited thereto ,

The "polymeric constituents" of the impregnating agent, referred to the molecular weight or the degree of polymerization, are the constituents which set the respective property of the body, in the case of a delayed-action impregnating agent, the polymeric constituents which cause the restoring delay due to their adhesive power. In particular, this applies in each case for acrylate / methacrylate polymers, in particular for acrylate polymers such as acrylic acid esters.

Due to the average molecular weight or the degree of polymerization of said polymeric constituents of the impregnating agent, in particular the polymer constituents causing the recovery delay, the adhesive effect to the self-adhesive layer and to the adhesive layer, in particular hot-melt adhesive layer, is set at the same time. The adhesion of the self-adhesive layer to the body can thereby be higher than to a non-impregnated body. The adhesion of the adhesive layer, which defines the cover layer on the body, in particular as a hot-melt adhesive layer, can thereby be at least equal to or higher than to a non-impregnated body.

The polymeric adhesive of the impregnating agent is preferably a polyacrylate and / or polymethacrylate, especially polyacrylate. Optionally, the polymer may also be or include a copolymer and / or terpolymer thereof.

Suitable polymers, copolymers and / or terpolymers for the Impregnating agents are in particular selected from the group consisting of polyacrylates, polymethacrylates, copolymers and terpolymers of acrylates or methacrylates with styrene, butadiene, ethylene, especially butadiene-acrylic acid C _1-4 alkyl ester copolymers (ABR), acrylate rubber (ACM), ethylene Acrylate copolymers (EAM), polystyrene, urethanes, etc. This applies in particular to impregnating agents for delayed recovery or for the adhesive-active components thereof.

The acrylate polymer of the impregnating agent used may be a polymer comprising acrylic esters and / or methacrylic acid esters and / or acrylic acid amides and / or methacrylic acid amides, in particular acrylic acid esters and / or methacrylic acid esters, in particular in each case acrylic acid esters. In the context of the invention, the term "acrylic acid" generally includes methacrylic acid, but in the narrower sense explicitly means acrylic acid as such, so that the "acrylates" are then acrylic acid esters and amides, to which reference is expressly made. The embodiments according to the invention relating to "acrylates" thus each relate expressly to acrylic acid compounds, in particular to acrylic esters. In particular, aliphatic alcohols or amides may be present as ester or amide components, without being restricted to these, for example, in each case those having C ₁ to C ₁₀ carbon chains or skeletons, in particular C ₁ to C ₄ carbon chains or skeletons, without to be limited to this. The aliphatic radicals may each be linear, branched or ring-shaped, preferably linear or branched, in particular linear.

It has proven to be particularly preferable if the acrylate polymer is a copolymer or, in particular, terpolymer. In this way, the adhesive force of the polymer particles can be specially adapted to the particular conditions present within the scope of the invention, on the one hand with regard to the adhesive force required for delayed recovery, and on the other hand with respect to adhesive forces in the dispersion particles present in relation to the walls of the pore structure upon introduction of the dispersion into the foam structure and / or the film-forming properties of the polymer particles during drying of the impregnated sealing strip, which have proven to be important for uniform recovery over the cross-section and length of the sealing tape. These copolymers and terpolymers preferably comprise ≥ 10-30% by weight or ≥ 50-60% by weight, preferably ≥ 70-80% by weight or ≥ 90-95% by weight of acrylate / methacrylate monomer units, in particular acrylate monomer units, in particular as an ester. The acrylate copolymers and terpolymers may contain ≥ 2-5 wt .-% or ≥ 10-15 wt .-%, optionally also ≥ 20-30 wt .-% or ≥ 40-50 wt .-% of copolymers other than acrylate / Methacrylate, preferably ≤ 40-50 wt .-% or ≤ 60-70 wt .-% or ≤ 80-90 wt .-% thereof. The abovementioned copolymer or terpolymer particles may have a weight fraction of ≥ 5-10% by weight or ≥ 20-30% by weight, optionally ≥ 50-75% by weight, based on the total weight of the polymer particles of the dispersion (ie based on the dry weight the polymeric constituents), preferably ≤ 50-75% by weight or ≤ 85-95% by weight thereof.

The term "polymer" also includes in each case also special polymers, such as copolymers and terpolymers, in which two or three chemically different types of monomers are linked to one another. In particular, the polymers used can only consist of one (chemical) type of monomer, in contrast to and in contrast to copolymers and terpolymers.

According to a preferred embodiment, the impregnating agent comprises polymer particles which consist entirely of a polyacrylate and / or polymethacrylate, in particular of a polyacrylate. The polyacrylate and / or polymethacrylate, in particular the polyacrylate, may in this case be ≥ 20-30% by weight or ≥ 40-60% by weight, preferably ≥ 75-85% by weight, particularly preferably ≥ 90-95% by weight. or at least about Make up 100% by weight of the polymeric constituents of the impregnating agent. The polyarylate or methacrylate is preferably present here as an ester, particularly preferably as a polyacrylic acid ester. This applies in each case preferably for the adhesive-reactive component of the impregnating agent.

The proportions by weight given in the context of the invention relating to the composition of the polymer particles of the impregnating agent generally relate to the total weight of the organic polymeric constituents of the impregnating agent (ie dry weight of the polymeric constituents).

The adhesive active ingredients of the impregnating agent may be used in a proportion of 20-300% with respect to the weight of the foam material (raw foam) or, for example, in the range of 25-250% or 25-200%. It has been found to be particularly preferable if the adhesive-active impregnating constituents are present in a proportion of ≥ 35-40% or in particular ≥ 50-60%, more preferably in a proportion of ≥ 70-75% or optionally also in 80-100% present. The foam weight (raw foam) of the body is here each used as a reference value of 100 parts (the weight ratio can refer to the body of the sealing tape as a whole or a unit volume such as 1 cubic centimeter or the like, which makes no difference with respect to the present weight ratio ). It has been found that when using the impregnating agent with such a weight ratio of the adhesive active ingredients with respect to the foam for the adhesion of the self-adhesive layer and / or the adhesive layer, in particular as a hot melt adhesive layer, is advantageous or compared to a sealing band body without impregnation also increased Adhesion can lead. For example, the adhesive actives of the saturant may be 35-175% or 35-200%, or 50-150% or more preferably, in terms of foam weight in the range of 75-125%. Optionally, the proportions of the adhesive reactive saturant ingredients may also be up to 150-175% or up to 200-250% of the body foam weight, optionally up to 275-300% or higher, without being limited thereto. Increasingly high impregnating agent levels are no longer advantageous since the body is then "over-impregnated", which can degrade the bleeding properties of the sealing tape under compression and no longer promote but even impair the recovery properties and adhesion to the self-adhesive or hot melt adhesive layer in that this is due to an increasing filling of the foam pores. The foam material (raw foam) is here thus the reference point with 100%. The details of the proportions relate in each case to the usable sealing tape, which is therefore preferably present in the dried state.

Furthermore, it has been found that when using the adhesive-active impregnating components with such a weight proportion to the body foam, in particular in the range of 35-175% or 35-200% or in the range of 50-150% or particularly preferably in the range of 75-125%. said weight fraction as stated in the previous paragraph, the sealing tape even when using relatively closed-cell foam materials with only low air permeability on the one hand manufacturing technology is still easy to produce, on the other hand also in the foams used in the invention, the respective requirements adapted provision is achievable, particularly preferred a not too fast reset, which allows a favorable handling of the sealing tape.

Furthermore, the impregnating agent of the body may comprise other components, for example organic and / or inorganic fillers, means for adjusting the thermal conductivity of the sealing tape etc (such as, for example, mineral fillers including Graphite), flame retardants, intumescent agents, agents for adjusting the viscosity of the impregnating agent, including thixotropic agents, antifouling agents and / or other auxiliaries, or the like, which are non-adhesive components in each case if the impregnating agent is a retarding agent. These other components may also be present if the impregnating agent sets other properties of the body than the restoring behavior such as water vapor diffusion resistance, UV stability / aging resistance, water and air permeability and the like. With respect to the weight of the foam material, these other components such as fillers, etc., may be employed in a weight proportion of 25-500% (ie, 100% as the weight of the raw foam body material without impregnating agent, etc.), preferably in the range of 20-350 % or 30-250%, more preferably in the range of 50-200% thereof, in particular 75-150% or 80-130%. It has been found that in this way, for example, the restoring behavior of the sealing strip is still essentially determined by the impregnating agent despite the otherwise otherwise unfavorable for this filler and is not unduly impaired. These components can be introduced into the body via the impregnating agent. The fillers may in particular comprise inorganic fillers such as insoluble silicates, silica, alumina, aluminosilicates, transition metal oxides such as titanium oxides, eg titanium dioxide, etc.

The impregnating agent film of the sealing bath may have a layer thickness of ≥ 5-10 μm or ≥ 15-20 μm. The layer thickness of the impregnating agent film may be ≦ 125-150 μm or preferably ≦ 75-100 μm or in particular ≦ 50-60 μm. Preferably, the layer thickness of the impregnating agent film in the range of 5-150 microns or 10-100 microns, more preferably in the range of 15-50 microns, for example. At about 30 microns. As a result, surprisingly, a good adhesion of the body with the self-adhesive layer and the adhesive layer, in particular hot melt adhesive layer achievable. Both adhesions, in particular those of the self-adhesive layer, are thereby increased compared to a non-impregnated body, but in particular also not reduced, which is especially true when using acrylates / methacrylates, in particular acrylates such as in particular acrylic acid ester. On the other hand, it has been shown that this layer thicknesses too high, which could also lead to a pore closure and thus insufficient penetration or contact of the body foam, avoided. Furthermore, this results in a good recovery behavior of the compressed body.

To be particularly advantageous, it has been found that the adhesive-active components of the impregnating agent (after drying) has a glass transition temperature of ≥ -70 ° C or ≥ - 65 ° C or optionally ≥ -50 ° C, for example up to 0 ° C or up to 5-10 ° C or possibly higher. In particular, the glass transition temperature of said tack-reactive component may be ≦ -50 ° C. or ≦ -40 ° C., for example ≦ -30 ° C. or ≦ -15 ° C. According to a first particularly preferred embodiment, the glass transition temperature Tg of the adhesive components is in the range from -70 to -45 ° C, preferably in the range from -65 to -50 ° C. Such impregnated sealing elements show at 20 ° C a sufficiently strong expansion or recovery even without additional aids such as heat input. It has been found that, in particular, such tacky components of the impregnating agent also increase the adhesive force of (for example, outside) adhesive tape layers attached to the sealing tape body, such as a self-adhesive layer or adhesive layer, such as hot melt adhesive layers.

The glass transition temperature can be determined in various ways within the scope of the invention. For example, via dilatomeric, dielectric, dynamic-mechanical or refractometric measurements, for example with the aid of NMR spectroscopy is. In particular, it is preferred in the context of the present application to determine the glass transition temperatures mentioned by a method known as the ASTM standard (Designation: D1356-03). It is also possible to use the ISO standard method, which performs the determination by means of differential caloric scanning (DSC), in particular DIN EN ISO 11357-1 (determination with differential flow calorimeter, simple calibration). In case of doubt, the measurement according to the ISO standard method is in any case attributable to inaccuracies. It is understood that the glass transition temperature is determined by the solids content of the adhesive. This can be obtained by drying and removing the solvent portions of the adhesive.

The impregnating agent is preferably formed in such a way that a (dried) impregnating agent film formed therefrom (including also any fillers, auxiliaries and other non-volatile constituents of the impregnating agent) has a tensile strength of ≥ 0.001 N / mm ² , optionally of ≥ 0.002-0.005 N / mm ² or ≥ 0.01 N / mm ² .

The tensile strength of the impregnating agent film can be up to 0.15-0.2 N / mm ² , optionally but not preferably up to 0.5-1 N / mm ² or in special applications up to 2-5 N / mm ² or beyond. The tensile strength may thus generally be in the range of 0.001 N / mm ² to 3 N / mm ² , preferably in the range of 0.01 N / mm ² to 1.0 N / mm ² . The dried impregnating agent film may have an elongation at break of ≥ 50-100% or ≥ 250-500% or more, for example up to 1000-1250% or up to 1500% or possibly even beyond. The elongation at break can therefore be in the range of 50-1500%. Elongation at break and tensile strength can be adjusted, for example, via the degree of polymerization of the polymeric constituents of the impregnating agent having adhesive properties.

The dried film of adhesive active ingredient ingredients (polymeric components of the saturant, without fillers, etc.) may have an elongation at break of ≥ 100-250% or ≥ 500-1000% or more, for example ≥ 1500%. The elongation at break, for example, up to 500-1000% or up to 2000-4000% or up to 6000% or more. The elongation at break can therefore be in the range of 100-6000%. The values of tensile strength and elongation at break each refer to a sample with a width of 5 mm and a thickness of 1 mm and a measurement in accordance with DIN EN 12311-2 / process B (Dec. 2000), which is generally valid for the purposes of the invention. Such polymer dispersion as latices, in particular acrylate / methacrylate dispersions, in particular acrylate dispersions, are known.

It has been found that such adhesive-active constituents of the impregnating agent, in addition to good adhesive properties with self-adhesive and adhesive layer, bring about a favorable recovery behavior in the case of the foams used in the context of the invention, in particular in the case of foams of low air permeability. It has been found that an excessively high tensile strength and elongation at break of the polymer film of the impregnating agent is not preferred since this can delay the recovery too strongly, in particular in the case of comparatively strongly closed-cell foams.

The film of the adhesive-active components of the impregnating agent can be produced for example by drying at 50-75 ° C or 80-90 ° C with moving air to constant weight. The dried impregnating agent film or film of the adhesive active ingredients, which is used in particular for determining the tensile strength and elongation at break, can be produced in each case by drying, for example by drying at 50-75 ° C with moving, for example, on a substrate such as silicone paper strip-like applied impregnating agent Air. He may then for handling in an example tensile force testing machine in a suitable thickness, for example 1 to 3 mm thickness, and suitable width, for example, 5 to 30 mm wide, are formed, based on the test area. The test specimen can be designed as "bone", ie with widened end regions, in accordance with DIN EN 1798.

The sealing tape or foam body according to the invention impregnated with the impregnating agent for delayed recovery preferably has a complete recovery within ≥ 15-30 min, preferably 1-1.5 h or particularly preferably ≥ 2-3 h in the free state, for example also ≥ 5-10 h. The recovery time is preferably ≦ 24-48 h, preferably ≦ 12-18 h, more preferably ≦ 8-10 h. Typically, the reset time can be in the range of 3 to 4 hours. The recovery time can be adjusted in particular by the amount of the impregnating agent introduced into the sealing tape or the foam body or its weight fraction of acrylate dispersion (based on the particular solid) with respect to the weight of the foam material. The reset time specified in the context of the invention relates in each case to 20 ° C./50% relative atmospheric humidity, unless otherwise specified in the context.

The information given in relation to the restoring behavior of the sealing tape or foam body according to the invention in each case relate to a compression of the sealing tape to 15% of its volume compared to the fully expanded sealing tape and to a full provision of the free, not kraftbeaufschlagten sealing tape in its fully retracted condition outside of one Gap.

It has proven to be expedient if the foam material of the sealing band body is a polyurethane foam material, particularly preferably in the form of a polyaddition product of one or more isocyanates and one or more polyether polyols or alternatively one or more polyester polyols. This has become for the Restoring properties and the Haftungeigenschaften the impregnated sealing tape body with self-adhesive layers and / or adhesive layers, in particular hot melt adhesive layers, proved to be particularly advantageous. In particular, acrylate / methacrylate polymer particles, in particular acrylate polymer particles, can adhere well to such a foam in order to bring about the aforementioned advantageous effects.

The volume weight of the raw foam of the sealing band body may generally be ≥ 10 -15 kg / m 3, preferably ≥ 17-20 kg / m 3 or ≥ 22-25 kg / m 3, for example approx. 25-30 kg / m 3, without being limited thereto to be. The volume weight of the raw foam of the sealing band body may generally be ≤ 35-40 kg / m 3 or ≤ 50-60 kg / m 3, optionally ≤ 75-100 kg / m 3, without being limited thereto.

The self-adhesive layer is preferably applied as a continuous layer over the entire body width, if appropriate, this is also applied only in regions on the broad side of the carcass. In a preferred embodiment, the adhesive is a self-adhesive, particularly preferably a double-sided adhesive tape, that is to say with a non-adhesive intermediate layer, such as a textile layer, arranged between the self-adhesive layers.

The self-adhesive on the lower body broadside with the adhesive side free to the outside is preferably selected from the group consisting of rubber, in particular synthetic rubber such as butyl rubber, synthetic resin, in particular acrylate resin. The adhesive is preferably different from the impregnating agent or its polymeric constituents used in each case. Preferably, the adhesive is in the form of a double-sided adhesive tape.

Generally in the context of the invention, the self-adhesive preferably has a peel adhesion (bond strength) to steel of at least 1 to 2 N / 25 mm at 23 ° C./50% relative atmospheric humidity ascertained in a test in accordance with DIN EN 1939: 2003 (D), method 3 (table 1), in contrast to which the adhesive film is pressed through a 5 kg roller and a waiting time between application and test of 10 minutes is maintained , The adhesive layer used is 25 mm wide and 300 mm long. The peeling takes place in a direction perpendicular to the width of the adhesive tape. The peel angle, as defined in DIN EN 1939: 2003 (D), is 180 °. The take-off speed is 300 mm / minute. Preferably, the peel adhesion of the adhesive under the conditions mentioned ≥ 3-4 N / 25 mm, more preferably ≥ 5-6 N / 25 mm (the bond strength is in each case in deviation to the DIN refer to a width of 25 mm). As a result, sufficient adhesion and thus tightness is ensured to the corresponding contact surface. There are no particular restrictions on higher values, these result from the properties of the adhesives / self-adhesives used; if necessary, the peel adhesion (bond strength) can be ≦ 75-100 N / 25 mm, if necessary ≦ 40-50 N / 25 mm or also ≤ 20-30 N / 25 mm. The adhesive strength of the adhesive is defined herein as being a double-sided adhesive tape, as is preferably used. If another adhesive is used, this preferably has a corresponding adhesive force under the comparison conditions used in each case. Such self-adhesive layers are known per se. The adhesive strength described achieves a good adhesion of the self-adhesive layer to the structural part to which the sealing tape is to be fastened, but in particular also a good adhesion of the self-adhesive layer to the sealing tape body, which is additionally increased by the use of an impregnated body with respect to a body which is not impregnated ,

The permanently attached cover layer on the upper body broadside can be made of a suitable material such as particularly preferably plastic or metal or possibly also paper consist. Plastic films as cover layers have proven to be particularly effective, since on the one hand they have good adhesion with the adhesive layer (in particular in the form of hotmelt adhesive), and on the other hand permit good sealing in the sealing state of the sealing strip when it bears against the joint wall. The good sealing properties are particularly important if the joint wall has a certain roughness and unevenness, for example. If the joint wall is provided by a component area of masonry, concrete parts or the like. The cover layer side of the sealing tape must also be sufficiently snug against the rough or irregular surface structure of the joint wall to prevent, for example, penetration of water or further transport of water sufficiently reliable, since the soft foam of the body is covered by the top layer here. The said water may be caused by driving rain or possibly by condensation of invading humidity. Plastic films have proven to be particularly useful here.

The cover layer is preferably generally a coherent, cured and non-adhesive material web, which can be provided on demand without other intermediate layers as a role and ready to be unwound ready made. The cover layer according to the invention is preferably applied as a continuous material layer on the body, in particular as a film.

Optionally, the top layer may also be applied to the body as a hardening fluid or pasty coating material, for example a plastic resin which cures on the body to form a permanently adhering coating layer of a synthetic resin material or the like, provided that the cover layer then has a sufficiently low adhesive force the self-adhesive layer, either intrinsically or optionally by an additional non-stick surface finish. The liner material is of the foam material of the body and the impregnant different. The cover layer of coating material here also preferably forms a non-puncture-free, particularly preferably non-porous, continuous cover layer.

The thickness of the cover layer can be ≥ 2 μm and / or ≤ 1000 μm. The top layer thickness is preferably ≥ 2-5 μm or ≥ 10 μm or in particular ≥ 20 μm or optionally also ≥ 30 μm. The cover layer thickness may in particular be ≦ 500-750 μm or preferably ≦ 300-400 μm or ≦ 150-200 μm, more preferably ≦ 75-100 μm. This top layer thickness has also proven to achieve a good seal against the adjacent joint wall, especially in rough and / or non-uniform joint walls, since the relatively thin top layer can still cling well to any irregularities of the joint wall.

The cover layer preferably extends at least across the width of the self-adhesive layer. The cover layer preferably covers the self-adhesive layer over its entire width, so that when the sealing tape is made up as a roll with windings arranged one above the other, the self-adhesive layer is completely separated from the body section of the adjacent turn by the cover layer. The cover layer preferably extends over the entire width of the sealing band body.

The topsheet layer (irrespective of any coating) preferably consists essentially of a material selected from the group consisting of polyolefins, in particular polyethylene (PE) and polypropylene (PP), halogenated polyolefins such as, for example, polyvinyl chloride (PVC), polystyrene (PS) , Polyamide (PA), polyesters, more preferably from the group polyethylene (PE) and polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS). Optionally, cellulose hydrate can also be used as cover layer. The cover layer can also be constructed as a composite film with several layers of different materials in the composite. The mentioned materials are understood in particular as upper and / or lower outer layer of the cover layer, if this should be formed as a composite layer. The layers of the cover layer may, in addition to or as an alternative to plastic material layers, also comprise other materials such as textile layers, paper layers and / or metal layers. Optionally, the side facing the body and / or the side facing away from the cover layer may also be a metal layer.

Particularly preferably, the cover layer on the side facing away from the carcass broadside side be provided with a non-stick coating in order to facilitate the release of the self-adhesive layer from the cover layer during unwinding of the sealing tape with sufficient or very low adhesive force. The non-stick coating is preferably a silicone or includes such. The cover layer and / or the non-stick coating thereof can be varied in a more varied manner and, for example, be selected from a broader material spectrum, including a spectrum of surface properties such as roughness, adhesion to the self-adhesive layer used on the underside of the body or the like, compared with a sealing tape with unimpregnated body. The sealing tape is thus more versatile and cheaper to produce. Optionally, the cover layer may be fixed to the body with a self-adhesive layer. Preferably, a hot melt adhesive layer is provided. The cover layer is permanently adhered or fixed by means of an adhesive layer on the body or the upper body broadside. The cover layer is preferably permanently adhered to the body with a hot melt adhesive layer. As a result, surprisingly, even with an impregnated body a sufficient adhesive force is given, moreover, the adhesion with a melt-adhesive layer is procedurally very efficiently feasible, also for adhesion to the body made of foam material. Optionally, the adhesive layer for adhesion of the cover layer may also be a self-adhesive layer or another suitable bonding adhesive. It is understood that the hardened or hardened adhesive layer should be sufficiently flexible or deformable in order to enable a production of the sealing tape as a roll.

A suitable adhesive for fastening the cover layer on the upper side of the sealing band body is a hot melt adhesive (hotmelt), preferably comprising at least one thermoplastic polymer, more preferably comprising a mixture of at least two thermoplastic polymers. The hot melt preferably comprises at least one polymer selected from the group consisting of polyamides (PA), polyethylene (PE), amorphous polyalphaolefins (APAO), ethylene vinyl acetate copolymers (EVAC; EVA), polyester elastomers (TPE-E), Polyurethane elastomers (TPE-U), copolyamide elastomers (TPE-A) and vinylpyrrolidone / vinyl acetate copolymers, particularly preferably comprising a mixture of polyethylene (PE) and ethylene-vinyl acetate copolymers (EVAC; EVA) (this mixture is also used with PE Abbreviated to -EVAC or PE-EVA), wherein the hot-melt adhesive may optionally additionally comprise a resin selected from the group consisting of rosin, terpenes and hydrocarbon resins. A hot melt adhesive particularly suitable according to the invention is based on or consists essentially of PE-EVA (PE-EVAC), i. a mixture of polyethylene (PE) and ethylene vinyl acetate copolymers (EVA, EVAC). Such a hot melt adhesive is marketed, for example, under the product name XAF 20601, manufacturer Fa. Collano Xiro.

Additionally or alternatively, the adhesive may be selected from the group consisting of natural rubber, synthetic rubber, in particular butyl rubber, synthetic resin, in particular acrylate resin.

The hot melt adhesive may have a melting temperature in the range of 70-150 ° C. The melting temperature is thereby in a range which is industrially feasible, on the other hand, a sufficiently high adhesion to the impregnated body caused. Undesirable thermal interactions with the body impregnation, which could affect these, are also avoided. The melting temperature of the adhesive is in this case preferably ≦ 120-130 ° or ≦ 90-100 °, if appropriate also ≦ 70 °. Preferably, the hot melt adhesive has a melting temperature of ≥ 70-75 ° C or ≥ 80-90 ° C, optionally ≥ 95-100 ° C, whereby a good or very good adhesion with the impregnated body is achieved. If the hot-melt adhesive has a melting range, then the average temperature of the melting range is regarded as the "melting temperature", from the beginning melting of portions of the adhesive to complete melting thereof. The melting interval from incipient to complete melting preferably has a temperature range of ≦ 25 ° C. or ≦ 10-20 ° C. or particularly preferably ≦ 2-5 ° C.

The adhesive force of the cover layer against the impregnated body, for example using a melt adhesive layer, preferably has a peel adhesion of ≥ 0.05 N / 25 mm or ≥ 0.1 N / 25 mm, preferably ≥ 0.25 N / 25 mm or ≥ 0.5 N / 25 mm, on. The peel adhesion may be ≦ 2-2.5 N / 25 mm or ≦ 3-5 N / 25 mm, for example ≦ 7-10 N / 25 mm, but may be higher.

The adhesive force (release force) of the cover layer against the self-adhesive layer on the opposite carcass broadside can be a peel adhesion of ≥ 0.001-0.0025 N / 25 mm, for example 0.005-0.01 N / 25 mm, or 0.02 N / 25 mm, for example approx. 0.04N / 25mm. The peel adhesion may be, for example, ≦ 0.07 N / 25 mm, preferably ≦ 0.1-0.16 N / 25 mm or else ≦ 0.2-0.3 N / 25 mm or even higher, for example ≦ 0 , 5-1 N / 25 mm. On the one hand, the adhesive force should be as small as possible, to make it easy Separate the turns during unrolling of the sealing tape roll to allow, on the other hand, a certain adhesive force has been found to be advantageous to ensure sufficient cohesion of the role, even with lateral force on the sealing tape roll. An adhesive force of approximately 0.04 N / 25 mm has surprisingly proved to be particularly suitable for meeting the stated requirements, or taking into account the abovementioned upper or lower threshold values.

The adhesive force of the self-adhesive layer on the underside of the body against the impregnated body preferably has a peel adhesion of ≦ 0.25 N / 25 mm or ≥ 0.5 N / 25 mm, preferably a peel adhesion of ≥ 1.0 N / 25 mm or ≥ 1 , 5 N / 25 mm, more preferably a peel adhesion of ≥ 2.0 3 N / 25 mm or ≥ 3 N / 25 mm or in particular also ≥ 3.5 N / 25 mm or ≥ 4 N / 25 mm. The peel adhesion may be, for example, about 5 N / 25 mm. The adhesive force of the self-adhesive layer on the underside of the body against the impregnated body can have a peel adhesion of ≦ 6.5-8 N / 25 mm or ≦ 10-12 N / 25 mm, for example ≦ 15-20 N / 25 mm or even ≦ 25 -30 N / 25 mm or ≤ 40 N / 25 mm, but possibly also higher.

The adhesive force of the cover layer with the adhesive layer against the sealing tape body may be greater than that by the factor ≥ 2-3 or preferably ≥ 5-7 or particularly preferably by the factor ≥ 8-10 or by the factor ≥ 12-15 or also ≥ 20 Adhesive force of the cover layer against the self-adhesive of the opposite carcass width side. The adhesive force of the cover layer with the adhesive layer against the sealing tape body can be greater by a factor of ≦ 80-150 or ≦ 40-60, preferably by a factor of ≦ 30-35, than the adhesive force of the cover layer against the self-adhesive of the opposite body width side. The adhesion of the cover layer with the adhesive layer against the sealing tape body may be greater than the adhesion of the cover layer by a factor of 5 to 150, preferably by a factor of 10 to 80, in particular by a factor of 12 to 60 For example, by the factor 15 to 40 or in particular about 25 against the self-adhesive of the opposite Korpusbreiteseite. This allows the cover layer solve during unwinding of the sealing tape safely from the self-adhesive layer, on the other hand, a certain adhesive force has been found to be advantageous to a sufficient To ensure cohesion of the roll, even with lateral force on the sealing tape roll. This can be achieved in particular by a suitable adhesion of the cover layer to the sealing band body, for example with a hot melt adhesive layer and impregnation of the body with an acrylate / metahacrylate polymer or acrylate polymer, but not limited thereto.

The adhesive force of the self-adhesive layer on the sealing tape body may be higher than the adhesive force of the adhesive layer (or cover layer) on the body, for example by a factor of ≥ 1.1 or by a factor of ≥ 1.25-1.5, for example Factor ≥ 2-3 or by a factor ≥ 4, eg by a factor of approximately 5. The mentioned factor can be ≤ 10-15 or ≤ 20-25, if necessary ≤ 50. As a result, the sealing tape is at the same time secure on the respective component fixable.

Due to its construction, the sealing strip can be compressed for delayed recovery and can be brought into a rolled up state or made into a roll, with the side of the cover layer facing away from the surface of the sealing strip, optionally with the non-stick coating applied there, in a suitable manner on the self-adhesive adheres and thus helps to hold the sealing tape role sufficiently stable even with lateral forces.

Furthermore, the invention comprises a arranged in a joint compressed sealing strip. The permanently adhered to the body cover layer is in this case sealingly against a joint wall. The sealing tape in the joint may be general in frame of the invention to 10-50% of its volume with complete free (out of joint) recovery, in particular to 20-40% or about 30%. As a result, a good joint seal with sufficient pressure force of the sealing strip is given to the joint edges.

Also included in the invention is a building with at least two components forming a joint between them, in which a sealing tape according to the invention is arranged, preferably in a state sealing the joint. In particular, in this case one of the components may be a frame component such as a window or door frame which is inserted into a masonry opening formed by the other component (or components). This also applies to façade joints, e.g. between concrete or clinker elements.

In the context of the invention, the term "broadside" is understood in the sense that this is the side of the sealing strip facing the frame profile or the wall reveal or the opposite side thereof. The two broad sides here form the top and bottom of the sealing strip. The two narrow sides of the sealing tape are in this case the room outside or room inside facing.

All technical standards referred to in this invention, such as DIN standards, refer to the version last valid prior to the priority date of this application (September 18, 2013), unless otherwise specified in the context.

Figur 1:

eine Querschnittsdarstellung des erfindungsgemäßen Dichtbandes in vollständig frei (also außerhalb einer Fuge und ohne Kraftbeaufschlagung) zurückgestellten Zustand;

Figur 2:

eine Querschnittsdarstellung eines Teils eines als Rolle konfektionierten, komprimierten Dichtbandes nach Figur 1;

Figur 3:

ein Dichtband nach Figur 1 abdichtend angeordnet in einer Fuge.

The invention will be explained by way of example with reference to the figures. Show it:

FIG. 1:

a cross-sectional view of the sealing tape according to the invention in completely free (ie outside a joint and without applying force) deferred state;

FIG. 2:

a cross-sectional view of a part of a Roll prefabricated, compressed sealing tape after FIG. 1 ;

FIG. 3:

a sealing tape after FIG. 1 sealingly arranged in a joint.

The sealing tape 1 ( Fig. 1 ) has a body 2 made of soft foam material, which is homogeneously impregnated with an impregnating agent, here an impregnating agent for the delayed recovery of the compressed sealing strip. "Soft" with respect to the foam is generally non-destructively compressible and recoverable within the scope of the invention. The sealing tape 1 (in Fig. 1 shown in completely free reset state) has the opposite broad sides 3 and 4, the body corresponding to the broad sides 3a and 4a. The upper broad side (upper side) 3 a of the body 2 is provided by means of an adhesive layer 5 with a permanently attached to this non-removable cover layer 6. The adhesive layer 5 may be formed in particular as a melt adhesive layer. The cover layer 6 can in particular be designed as a film, more particularly as a plastic film.

The lower broad side (underside) 4a of the body is provided with a fastening means for fixing the sealing strip 1 to a component such as a frame component or a joint-limiting component such as a masonry area, namely a fastening means in the form of a self-adhesive layer 7 with adhesive-active free underside 7a, for example in the form of a double-sided adhesive tape. The self-adhesive layer 7 has a free, adhesive-functionalized underside 7a. With the adhesive-active upper side, the double-sided adhesive tape is fixed to the impregnated body. The opposite narrow sides 8, 9 of the sealing strip (which here correspond to the narrow sides of the body) can, when installing the sealing strip in a joint, for example. A joint between a window frame and a wall reveal, be arranged according to the room inside (RI) and the room outside RA or be arranged in the installed state.

In the rolled-up state of the sealing strip in which it is compressed, the cover layer 6 of the sealing strip upper side 3 adheres to the adhesive-reactive underside 7a of the self-adhesive layer 7. Fig. 2 shows a section of such prefabricated as a roll 15 sealing strip in cross-section, with the central axis 16 of the roller.

In installation position of the sealing strip in a joint 20 (see Fig. 3 The sealing tape 1 with the self-adhesive layer 7 is fixed to a joint wall 21a, for example on a frame component 21, the cover layer 6 sealingly abutting against the opposite joint wall 22a, which is provided by another component such as, for example, a wall or brickwork component 22 becomes. The sealing tape can be present here, for example, in a degree of compression of about 25% in the joint with sealing contact on both joint walls. The sealing tape is released with unwinding from the roll for delayed recovery, possibly also by another suitable measure. The statements made herein may apply to all embodiments and generally within the scope of the invention.

The invention will be explained by way of example with reference to specific embodiments, these embodiments may apply to the other embodiments or generally within the scope of the invention, unless otherwise specified in the context.

According to a first specific embodiment of the invention, the sealing tape 1 (corresponding Fig. 1 ) a body 2 made of a soft foam material, here polyurethane foam, on. The body has a rectangular cross section, one or more of the boundary surfaces of the body may also be structured, for example in the form of one of the side surfaces of the sealing strip towards rising profile line, which may possibly apply generally in the context of the invention. The body foam material (raw foam) here has an air permeability of about 150 1 / m ² s.

The body 2 is preferably impregnated homogeneously with an impregnating agent, here an impregnating agent for the delayed recovery of the compressed body. Optionally, other impregnating agents may be used to adjust other properties of the sealing tape, such as its water vapor resistance or air and water permeability, UV and aging resistance, which may optionally be chemically similar to the delayed recovery impregnating agent but are then substantially free of adhesive (eg, another Glass transition temperature or other degree of polymerization and / or crosslinking). The resetting-delaying impregnating agent is used here in the form of an acrylate dispersion with acrylate polymers as adhesive or adhesive-reactive component of the impregnating agent, the dispersion containing dispersed in homogeneous phase acrylate polymer particles. Preferably, an aqueous dispersion is used. The ready-to-use sealing tape is in dried form in relation to the impregnating agent, so that the sealing tape or the impregnated body of the ready-to-use sealing tape only has a low content of residual moisture, for example ≦ 3-5% by weight.

In terms of its solids content, the impregnating agent dispersion used has a weight fraction of adhesive acrylate polymer particles of 50-65%, for example about 55% by weight. According to the exemplary embodiment, the impregnating agent dispersion used comprises other components such as fillers and intumescent agents and further auxiliaries in small proportions, here in total based on the solids content of the impregnating agent in a weight fraction of about 35-50% by weight, for example about 45% by weight .-%.

The total impregnating agent used may have a solids content of about 50 wt .-%, without being limited thereto.

The acrylate polymer particles according to the embodiment have an average diameter of 0.1-1 microns, for example. About 0.5 microns.

As the acrylate according to this embodiment, an acrylate polymer is used, such that the impregnating agent <5 wt .-% of dispersed polymer particles which contain no acrylate. In particular, the acrylate used is an acrylate copolymer, more specifically an acrylate-butadiene copolymer. The butadiene content of the copolymer may be 10-50% by weight, based on the polymer, for example about 15% by weight. However, pure acrylate polymers, ie without copolymer constituents, have also proved suitable. The acrylate polymer used has ≦ 5 wt .-% or virtually no ionic polymers. The acrylate polymer is each specifically an acrylic acid ester polymer.

According to a modification of this embodiment can be used as impregnating an acrylate polymer (also acrylate copolymer), wherein more dispersed polymer particles are present which do not have an acrylate polymer. These particles may, for example, be dispersed rubber particles, for example polybutadiene particles.

The acrylate polymer used according to this embodiment and its modifications has a glass transition temperature of -45 ° C. The acrylate copolymer has a degree of polymerization in the range of 5,000-25,000 monomer units, for example, about 15,000 monomer units.

The sealing tape body 2 has a weight proportion of about 63% of impregnating components (dry weight), based on the total weight of the impregnated body. The raw foam of the sealing tape body 2 thus makes a weight proportion of about 37% of the impregnated body on. The volume weight of the raw foam of the body can be, for example, about 28 kg / m3, the density of the impregnated body about 75 kg / m3. The weights of the sealing tape refer in each case to the dried, ready-to-use sealing tape.

The sealing tape 1 has at 20 ° C / 50% relative humidity and compression to about 15% of its original volume a reset time (to full recovery) of about 24 hours, at 0 ° C, a reset time of about 72 hours.

It is advantageous to impregnate the sealing tape 1 with such a proportion by weight of polymer dispersion, in particular acrylate dispersion for delayed recovery, that the sealing tape at 20 ° C / 50% relative humidity a restoring delay of ≥ 15 min and / or ≤ 24 hours until complete recovery of the sealing strip, with a degree of compression of the sealing strip to 10-20%, preferably 14-16%, more preferably about 15%, based on the sealing tape volume at full recovery.

If a film is prepared from the impregnating agent (ie the aqueous dispersion used for impregnation) by drying at 75 ° C. with constant air to constant weight, this film (when dried) has a tensile strength of 0.05 N under the conditions described in the introduction. mm2, an elongation at break of 500% and a peel adhesion (bond strength) to steel of at least 0.2 N / 25 mm, for example about 0.5 N / 25 mm.

A cover layer is permanently attached to the body by means of an adhesive layer in the form of a melt adhesive layer on the body upper side 3a. The cover layer is not destructively removable from the body, usually with destruction or damage to the body by adhering to the adhesive layer areas of the body. The melting temperature the adhesive is about 90 ° C. The hotmelt adhesive here is, for example, one based on a thermoplastic PE-EVA copolymer. According to a modification, the hot-melt adhesive (hotmelt) is based on ethylene-vinyl acetate copolymers (EVAC, EVA). Optionally, the hot melt adhesive may also be applied to the body in multiple layers.

The cover layer permanently fixed to the body by means of the hot-melt adhesive is here a plastic film, for example a PE film. The thickness of the cover layer is here about 35 microns thick. The cover layer has a non-stick coating on its free upper side, for example in the form of a very thin silicone layer.

On the lower body side 4a, a commercially available double-sided adhesive tape is applied as a self-adhesive layer with adhesive-reactive lower side 7a or adhered to the body. Such adhesive layers are, for example, already used as self-adhesive layers in the sealing tape illmod 600, a product of Tremco illbruck Produktion GmbH, Bodenwöhr, Germany, or in other known sealing tapes.

The self-adhesive layer may be factory provided on its side facing away from the body with a decal such as, for example, from silicone paper. This decal is removed before the sealing tape is made up as a roll. For this purpose, the sealing tape with the self-adhesive layer protective, adhered to this decal can be compressed, for example. By passing through a roller mill. Then the decal is removed at the factory. The then free self-adhesive layer is then releasably adhered to the free upper side of the cover layer 6 when rolling up the sealing tape in order to assemble this as a roll. The sealing tape roll can then be handled by the customer in the usual way, with separation of the self-adhesive layer 7 of the cover layer, whereby the free adhesive-reactive bottom 7a of the self-adhesive layer. 7 then exposed. The cut-to-length sealing tape can then be fastened directly to a component such as a frame component.

1. a) Haftung der Selbstklebeschicht 7 an dem nicht imprägniertem Korpus (Polyurethanschaum): ca. 3,3 N/ 25 mm
2. b) Haftung der Selbstklebeschicht 7 an dem imprägnierten Korpus (Polyurethanschaum)(Imprägnierungsmittel wie oben beschrieben): ca. 5,0 N/25 mm
   Dies entspricht einer ca. 50 %-igen Steigerung der Haftkraft auf imprägniertem Dichtbandschaum gegenüber nichtimprägniertem Dichtbandschaum. In beiden Fällen kam es zum sog. Kohäsionsbruch, d.h. zur Trennung der Kleberschicht in sich. Es zeigt sich aber an den unterschiedlichen Werten für die Haftkraft, dass diese auf imprägniertem Schaum überraschenderweise größer ist als auf nichtimprägniertem Schaum, d.h. das Doppelklebeband, das später auch zur Befestigung des Dichtbandes in einer Fuge, beispielsweise an einem Fensterrahmen oder einer Mauerlaibung dient, haftet überraschenderweise deutlich besser auf einem imprägnierten als auf einem nichtimprägnierten Polyurethanschaum.
3. c) Haftung der Decklage 6 (Kunststofffolie, im speziellen PE-Folie) verklebt mit Schmelzkleber (PE-EVA-Copolymers), Schmelztemperatur 90°C, auf nicht imprägniertem Korpus (Polyurethanschaum): ca. 0,7 N/25 mm.
4. d) Haftung der Decklage 6 (Kunststofffolie, im speziellen PE-Folie) verklebt mit Schmelzkleber (PE-EVA-Copolymers), Schmelztemperatur 90°C, auf imprägniertem Korpus (Polyurethanschaum) (Imprägnierungsmittel wie oben beschrieben): ca. 0,9 N/25 mm.
5. e) Haftung (Release-Kraft) der Selbstklebeschicht 7 gegen die Decklage 6 (mit Antihaftbeschichtung versehen): ca. 0,04 N/25 mm.

The adhesion (adhesive force, peel force) of the cover layer 6 and the self-adhesive layer 7 on the body according to the embodiment was measured (as well as in comparison with non-impregnated body):

1. a) adhesion of the self-adhesive layer 7 on the non-impregnated body (polyurethane foam): about 3.3 N / 25 mm
2. b) Adhesion of the self-adhesive layer 7 to the impregnated body (polyurethane foam) (impregnating agent as described above): about 5.0 N / 25 mm
   This corresponds to an approx. 50% increase in the adhesive force on impregnated sealing tape foam compared to non-impregnated sealing tape foam. In both cases, there was a so-called cohesive failure, ie the separation of the adhesive layer in itself. However, it is apparent from the different values for the adhesive force that this is surprisingly greater on impregnated foam than on non-impregnated foam, ie the double-sided adhesive tape which later also serves for fastening the sealing tape in a joint, for example on a window frame or a wall reveal surprisingly much better on an impregnated than on a non-impregnated polyurethane foam.
3. c) adhesion of the cover layer 6 (plastic film, in particular PE film) glued with hot melt adhesive (PE-EVA copolymer), melting temperature 90 ° C, on non-impregnated body (polyurethane foam): about 0.7 N / 25 mm.
4. d) adhesion of the cover layer 6 (plastic film, in particular PE film) glued with hot melt adhesive (PE-EVA copolymer), melting temperature 90 ° C, on impregnated body (polyurethane foam) (impregnating agent as described above): about 0.9 N. / 25 mm.
5. e) Adhesion (release force) of the self-adhesive layer 7 against the cover layer 6 (provided with non-stick coating): approx. 0.04 N / 25 mm.

The soft foam material of the body and the impregnating agent (if present) in the above examples a) to e) is the same in each case. The foam material of the body (raw foam) in this case has a density of 28 kg / m3 and an air permeability of 150 1 / m ² s.

Surprisingly, the difference between the topcoat adhesion on the impregnated foam and the release force is very clear (22.5 times greater adhesion of the top layer to the polyurethane foam than to the self-adhesive layer (double-sided adhesive tape); 0.9: 0.04 = 22, 5). This shows that the cover layer will not detach from the foam when unwinding the sealing tape rollers, but because of the weak release force, the roll can be opened easily, the separation of the layers takes place in the right place and the top layer does not fall off.

In addition, taking into account the above adhesion values, the self-adhesive layer adheres more strongly to the impregnated foam by about 125 times ((5.0 N / 25 mm) :( 0.04 N / 25 mm)) than on the top layer. In contrast, when using a non-impregnated foam, there is an adhesion of the self-adhesive layer (double-sided adhesive tape) on the non-impregnated foam, which is only about 80 times stronger, than on the cover layer. Thus impregnated foam is even better than non-impregnated foam Foam ensures that a simple separation of the thin cover layer is made by the double-sided adhesive tape. In this way, the cover layer can be varied more varied, for example. Be waived under certain circumstances on a non-stick coating. In addition, this increases the possible storage life of the sealing strip, for example, from the point of view of a reduction in the adhesive force of the cover layer and / or the self-adhesive layer on the body with increasing storage life.

Furthermore, it follows that the top layer with hot melt adhesive (hot glue) adheres more strongly to the impregnated body than on the non-impregnated body, here with about 28% higher adhesion.

The sealing tape according to the invention is further characterized in that it has a long service life even at elevated temperature (for example 50 ° C.) and elevated pressure (for example when compressed to 7% of its volume at full free return) in the installation position. It is under these conditions, as they can easily result in temperature-related component displacements in the joint area, virtually no flow of the impregnating film observed, for example, by accumulation of impregnating agent on the non-pressure-loaded sealing strip surfaces can be noticeable. This can be simulated, for example, by appropriate tests in a drying oven, wherein in the case of sealing tapes according to the invention, even after 1-2 hours or even after 5-10 hours or beyond, for example after 24 or 48 hours, no change or no bleeding can be observed, wherein sealing strips produced by impregnation with acrylate solutions show a significantly more unstable behavior than those produced by impregnation with acrylate dispersions.

Furthermore, the sealing strip according to the invention has a very high storage life, without significant change in the adhesive forces of the individual layer we cover layer and self-adhesive layer with the impregnated body and each other.

According to a further embodiment, the sealing band body has an air permeability of about 75 1 / m ² s, the impregnating agent has here as Rückstellverzögerndes, adhesive active agent Acrylatpolymerteilchen (in particular acrylic acid ester polymer particles) with an average diameter of about 10 microns. Incidentally, reference is made to Example 1, which also applies here.

Claims (17)

1. Sealing strip (1) for the sealing of constructions, comprising a sealing strip body (2) made of a flexible foam with shape return capability, wherein the sealing strip (1) has upper and lower broad sides (3a, 4a) which can be applied to the opposite joint flanks of a construction joint (20) that is to be sealed, wherein the sealing strip body (2) has upper and lower broad sides (3a, 4a), assigned to the sealing strip broad sides (3a, 4a), and narrow sides (8, 9) which connect said broad sides and which are or can be arranged on the inside of the room and on the outside of the room in a sealing arrangement of the sealing strip (1), and a layer (7) of a self-adhesive is applied to the lower broad side (4a) of the body in order to attach the sealing strip (1) to a component, wherein the sealing strip (1) is fabricated as a roll (15) with a plurality of turns located radially one on top of the other, and in the turns in each case the lower broad side (4a) of the sealing strip body comes to bear flat against the upper broad side (3a) of the body, wherein a cover layer (6) is durably adhered to the upper broad side (3a) of the sealing strip body (2), wherein the sealing strip (1) is rolled up with the cover layer (6) of a first turn bearing against the self-adhesive layer (7) of an adjacent turn, and wherein the adhesive force of the cover layer (6) against the sealing strip body (2) is greater than the adhesive force of the cover layer (6) against the self-adhesive,
   characterized in that the flexible foam of the sealing strip body (2) is impregnated with at least one impregnating agent, and in that the cover layer (6) is attached by an adhesive to the upper broad side (3a) of the sealing strip body (2) or the cover layer (6) is formed as a fluid or paste-like coating compound which is cured onto the sealing strip body (2) in order to form a durably adhering coating layer made of a synthetic resin material or the like.
2. Sealing strip (1) according to claim 1,
   characterized in that

   (i) the cover layer (6) comprises a plastic or metal film or paper layer and/or (ii) the cover layer (6) comprises an anti-adhesion coating on the side facing away from the body broad side (3a).
3. Sealing strip (1) according to any of claims 1 to 2,
   characterized in that
   the cover layer (6) is attached to the sealing strip body (2) by means of a hot-melt glue as the adhesive.
4. Sealing strip (1) according to claim 3,
   characterized in that
   the hot-melt glue has a melting temperature in the range from 70 to 150°C.
5. Sealing strip (1) according to any of claims 1 to 4,
   characterized in that
   the self-adhesive layer (7) arranged on the lower side of the sealing strip (1) has an adhesive force against the sealing strip body (2) of ≥ 1.0 N/25 mm and/or ≤ 20 N/25 mm.
6. Sealing strip (1) according to any of claims 1 to 5,
   characterized in that
   the cover layer (6) has an adhesive force against the sealing strip body (2) of ≥ 0.2 N/25 mm and/or ≤ 10 N/25 mm.
7. Sealing strip (1) according to any of claims 1 to 6,
   characterized in that
   the self-adhesive layer (7) arranged on the lower side (4a) of the sealing strip (1) has an adhesive force against the sealing strip body (2) which is greater than the adhesive force of the cover layer (6) against the sealing strip body (2), preferably greater than the adhesive force of the cover layer (6) against the sealing strip body (2) by a factor greater than/equal to 1.5.
8. Sealing strip (1) according to any of claims 1 to 7,
   characterized in that
   the cover layer (6) has an adhesive force against the sealing strip body (2) which is greater than the adhesive force of the cover layer (6) against the self-adhesive layer (7), preferably greater than the adhesive force of the cover layer (6) against the self-adhesive layer (7) by a factor greater than/equal to 5-10.
9. Sealing strip (1) according to any of claims 1 to 8,
   characterized in that
   the impregnating agent is an agent for delayed shape return of the flexible foam material.
10. Sealing strip (1) according to any of claims 1 to 9,
    characterized in that
    the impregnating agent is or comprises an acrylate and/or methacrylate polymer.
11. Sealing strip (1) according to any of claims 1 to 10,
    characterized in that
    the impregnating agent is an adhesively active polymer, in particular acrylate/methacrylate polymer, which has a glass transition temperature of ≤ 10-20°C, preferably in the range from -70°C to +20°C.
12. Sealing strip (1) according to any of claims 1 to 11,
    characterized in that
    the impregnating agent, in the form of an impregnating agent film, (i) has a tensile strength of ≥ 0.001 N/mm² and/or ≤ 5 N/mm² and/or (ii) has an elongation at break of ≥ 50% and/or ≤ 1500%.
13. Sealing strip (1) according to any of claims 1 to 12,
    characterized in that
    the impregnating agent in the body interior covers as a film the pore walls of the foam material of the body, with a layer thickness of the impregnating agent film in the range from 5 to 150 µm.
14. Sealing strip (1) according to claim 11,
    characterized in that the proportion by weight of the adhesively active polymer components of the impregnating agent relative to the weight of the flexible foam of the sealing strip (1) lies in the range from 35 to 200%, particularly preferably in the range from 50 to 150%.
15. Sealing strip (1) according to any of claims 1 to 14,
    characterized in that
    the impregnated sealing strip (1) has in the fully expanded state an air permeability oft 600 l/m²s.
16. Frame component (21) or construction element having a sealing strip (1) according to any of claims 1 to 15 attached thereto in a narrow side thereof, wherein the sealing strip (1) is attached to the frame component (21) or construction element by the self-adhesive layer (7) arranged on the lower broad side (4a) of the body.
17. Construction having a sealing strip (1) according to any of claims 1 to 15 arranged in a joint (20).

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