Mounting system in combination with a non-hazardous moisture cross-linking liquid adhesive for attaching fastening elements to a wall

Abstract

The invention relates to a mounting system consisting of a fastening element and a liquid adhesive, wherein iii) the fastening element has a main body and is designed to receive an element for holding the object, and the main body has, on its rear side facing the wall, a recess and a filling opening which opens into said recess and is used to introduce the liquid adhesive between the fastening element and the wall, and iv) the liquid adhesive is a moisture-crosslinking SMP adhesive (SMP = silane-modified polymer) and comprises an organotitanate or organozirconate catalyst, at least one base such as a nitrogen-containing compound and an oligomeric water scavenger.

Description

[0001] tesa SE

[0002] Norderstedt

[0003] Mounting system in combination with a label-free, moisture-curing liquid adhesive for attaching fasteners to a wall

[0004] The invention relates to a mounting system in combination with a moisture-curing liquid adhesive for attaching fasteners to a wall, particularly in rooms equipped with tiles, marble slabs or similar wall coverings, wherein the fastener is designed for holding stationary objects such as towel rails, shelves or similar furnishings, and the moisture-curing liquid adhesive is formulated with regard to the raw materials in such a way that no hazard labeling is required in accordance with the European Chemicals Regulation (EC) No. 1272 / 2008 (CLP) and the regulation of end-user products in the USA by the Occupational Safety and Health Administration (OSHA), and yet there are no limitations compared to the prior art with regard to the curing time and the holding performance of the mounting system.The absence of labeling requirements for the adhesive is a market and customer demand resulting from an increasing focus on sustainability by companies, but is also often a wish of the end consumer.

[0005] A variety of mounting systems and liquid adhesives for attaching fasteners of various designs and materials to walls in sanitary and kitchen areas are known from the state of the art. However, a particular problem with such walls and their wall coverings in the form of tiles or marble slabs is that, for example, in the case of a tiled wall, the fasteners are traditionally attached between the tiles in the joints, especially in the area of ​​the tile intersections, by drilling. This often damages the tiles adjacent to the respective joint, causing them to chip or crack their glaze. Besides visually noticeable quality losses, this also causes long-term damage, requiring time-consuming rework.or that, in the case of local relocation of the fastening point or incorrect installation in hard-to-reach areas such as corners and edges, unsightly dowel holes that need to be filled are created, in addition to the difficulty of attaching the fasteners. For this reason, the fasteners are often attached using a wide variety of adhesive bonds, which, however, must meet the requirements that the fasteners must withstand greater forces to accommodate further mounting elements in the form of fixed objects, such as towel rails, shelves, etc., taking into account the structural and static conditions such as the strength of the adhesive, the strength of the fastener, the surface load of the mounting system, and the construction of the wall systems.

[0006] From DE 44 16 884 A1, a device for mechanically fastening a solar generator module to a substructure using an adhesive is known. In this device, a mounting plate (a fastening element) is attached to a section of a predetermined surface of the solar generator module using an adhesive. The mounting plate is first placed with one of its surfaces against or onto the relevant section of said surface. To create an adhesive gap, one or more molded plastic parts are arranged between the relevant surfaces of the mounting plate and the support surface. The mounting plate has a through-opening for introducing adhesive from the outside into the adhesive gap.Furthermore, the mounting plate incorporates at least one vent hole to allow air trapped in the adhesive gap to escape when adhesive is injected, ensuring the adhesive completely fills the gap. This vent hole, leading away from the adhesive gap, also serves as a control for verifying that the gap is fully filled with adhesive. When adhesive emerges from this vent hole, the adhesive gap is completely filled. To prevent the threaded hole in the mounting plate, which serves to connect the solar module to a substructure, from becoming unusable due to the adhesive, a special screw is temporarily installed in the threaded hole. This screw has a through-hole through which adhesive can be injected into the adhesive gap.The type of adhesive or its composition is not disclosed. EP 1 440 246 B1 describes a mounting system for attaching objects to fixed surfaces in combination with a moisture-curing liquid adhesive, preferably a silicone. The mounting system has a base body with a cavity for receiving an adhesive or bonding agent, which is applied to the cavity through an opening. The base body or its back surface consists at least partially of an open-pore material to ensure moisture or gas exchange between the cavity and the environment. The composition and instructions for using the liquid adhesive are not disclosed. Optionally, the base body can be connected to a threaded stud to which objects can be attached. Sealing against the wall is preferably achieved with a self-adhesive foam ring.

[0007] Based on this prior art, the invention aims to create a mounting system for attaching fastening elements to a wall, particularly in rooms equipped with tiled walls, in which, on the one hand, the described disadvantages of the prior art, in particular with regard to the marking of the liquid adhesive, are eliminated by simple means, and on the other hand, the fastening elements are easy to mount and, furthermore, should be inexpensive to manufacture.

[0008] To solve this problem, the invention proposes a mounting system consisting of a fastening element and a liquid adhesive, wherein i) the fastening element has a base body and is designed to receive an element for holding the object, and the base body has on its back side facing the wall a recess and a filling opening opening into the latter, which serves to introduce the liquid adhesive between the fastening element and the wall, and ii) the liquid adhesive is a moisture-curing SMP adhesive (SMP = silane-modified polymer) and comprises an organotitanate or organozirconate catalyst, at least one base such as a nitrogen-containing compound and an oligomeric water scavenger.

[0009] The composition of the adhesive according to the invention avoids the need for hazard labeling in accordance with the European Chemicals Regulation (EC) No. 1272 / 2008 (CLP) and the regulations for consumer products in the USA by the Occupational Safety and Health Administration (OSHA). Furthermore, compared to adhesives known from the prior art, there are no limitations regarding the curing time of the liquid adhesive and the holding power of the assembly system.

[0010] According to a preferred embodiment, the fastening element has at least one moisture- and gas-permeable opening for the escape of the air displaced by the liquid adhesive introduced into the recess, which extends from the recess to another surface of the fastening element and which receives excess adhesive or bonding agent.

[0011] In a further preferred embodiment, the base body and / or the back of the base body facing the wall consist at least in a partial area of ​​an open-pored material and are thus permeable to moisture and / or gas in such a way that the gas produced during the curing of the liquid adhesive located in the recess can escape or escaping binders can evaporate (evaporation) and at the same time ambient air can reach the adhesive and bonding agent located in the recess.

[0012] According to the invention, a combination of the two variants is also realized.

[0013] A moisture-curing liquid adhesive is used as an adhesive and bonding agent between the wall and the base body of the fastening element, particularly preferably a moisture-curing liquid adhesive characterized in that it comprises i) at least one silane-functionalized polymer (SMP), ii) at least one catalyst from the group of organotitanates or organozirconates, iii) at least one base such as a nitrogen-containing compound, iv) at least one polysiloxane-based drying agent containing vinyl groups and methoxy groups, and that v) it contains no tin or organotin compounds, and that vi) it is label-free in accordance with the European Chemicals Regulation (EC) No.1272 / 2008 (CLP) and the regulation of consumer products in the USA by the Occupational Safety and Health Administration (OSHA) and that vii) it does not have any limitations compared to the state of the art with regard to the curing time of the adhesive and the holding performance of the mounting system.

[0014] The adhesive contains at least one silane-functional polymer P, which preferably has one, two or more groups, preferably end groups, of formula (I).

[0015] The remainder R 1 for an alkyl group with 1 to 8 carbon atoms, in particular for a methyl or for an ethyl group.

[0016] The rest R 2 R represents an acyl or alkyl group with 1 to 5 carbon atoms, in particular a methyl, ethyl, or isopropyl group. R is usually preferred. 2 for a methyl or ethyl group.

[0017] The rest R 3stands for a linear or branched, optionally cyclic, alkylene group with 1 to 12 C atoms, optionally with aromatic components, and optionally with one or more heteroatoms, in particular with one or more nitrogen atoms.

[0018] The index a represents a value of 0, 1, or 2, in particular a value of 0.

[0019] Within a silane group of formula (I) there are R 1 and R 2 Each independently for the described residues. Thus, for example, compounds of formula (I) are also possible, which ethoxy-dimethoxy-alkylsilanes (R 2 = Methyl, R 2 = Methyl, R 2 = Ethyl).

[0020] In a first preferred embodiment, the silane-functional polymer P is a silane-functional polyurethane polymer P1, obtainable by reacting a silane having at least one isocyanate-reactive group with a polyurethane polymer having isocyanate groups. This reaction is preferably carried out in a stoichiometric ratio of isocyanate-reactive groups to isocyanate groups of 1:1 or with a slight excess of isocyanate-reactive groups, such that the resulting silane-functional polyurethane polymer P1 is preferably entirely free of isocyanate groups. The excess of isocyanate-reactive groups to isocyanate groups is preferably at most 1.1:1.The silane, which has at least one group reactive towards isocyanate groups, is, for example, a mercaptosilane, an aminosilane, or a hydroxysilane, in particular an aminosilane. Preferably, the aminosilane is an aminosilane AS of formula (1a).

[0021] (R')a

[0022] .. H l > _ (la)

[0023] R 11 — N — R 3 — Si — (OR 2 ) 3.a ' where R 1 , R 2 , R 3 and have already been described previously, and R 11 for a hydrogen atom or for a linear or branched hydrocarbon residue with 1 to 20 C atoms, which may have cyclic features, or for a residue of formula (II).

[0024] The remaining R 12 and R 13 , independently of each other, for a hydrogen atom or for a residue from the group comprising -R 15 , -CN and -COOR 15 .

[0025] The rest R 14 stands for a hydrogen atom or for a residue from the group comprising -CH2-COOR 15 , -COOR 15 , CONHR 15 , -CON(R 15 )2, -CN, -NO2, -PO(OR15)2, -SO2R 15 and -SO2OR 15 .

[0026] The rest R 15 stands for a hydrocarbon residue containing 1 to 20 carbon atoms, possibly containing at least one heteroatom.

[0027] Examples of suitable aminosilanes AS are primary aminosilanes such as 3-aminopropyltriethoxysilane, 3-aminopropyldiethoxymethylsilane; secondary aminosilanes such as N-butyl-3-aminopropyltriethoxysilane, N-phenyl-3-aminopropyltriethoxysilane; the products of the Michael-type addition of primary aminosilanes such as 3-aminopropyltriethoxysilane or 3-aminopropyldiethoxymethylsilane to Michael acceptors such as acrylonitrile, (meth)acrylic acid esters, (meth)acrylamides, maleic and fumaric acid diesters, citraconic acid diesters and itaconic acid diesters, for example N-(3-triethoxysilyl-propyl)-aminosuccinic acid dimethyl and diethyl esters, as well as analogues of the aforementioned aminosilanes with methoxy or isopropoxy groups instead of the preferred ethoxy groups on the silicon. Secondary aminosilanes, especially aminosilanes containing R, are particularly suitable as aminosilanes. 4in formula (III) is different from H. The Michael-type adducts are preferred, in particular N-(3-triethoxysilyl-propyl)-aminosuccinic acid diethyl ester.

[0028] In this document, the term "Michael acceptor" refers to compounds which, due to the double bonds they contain that are activated by electron acceptor residues, are capable of undergoing nucleophilic addition reactions with primary amino groups (NH2 groups) in a manner analogous to Michael addition (hetero-Michael addition).

[0029] Suitable polyurethane polymers containing isocyanate groups for the production of a silane-functional polyurethane polymer P1 include, for example, polymers obtainable by reacting at least one polyol with at least one polyisocyanate, in particular a diisocyanate. This reaction can be carried out by reacting the polyol and the polyisocyanate using conventional methods, for example at temperatures of 50 °C to 100 °C, optionally with the use of suitable catalysts, wherein the polyisocyanate is dosed such that its isocyanate groups are present in stoichiometric excess relative to the hydroxyl groups of the polyol.

[0030] In particular, the excess of polyisocyanate is preferably chosen such that, after the reaction of all hydroxyl groups of the polyol, the resulting polyurethane polymer retains a content of free isocyanate groups of 0.1 to 5 wt.%, preferably 0.1 to 2.5 wt.%, particularly preferably 0.2 to 1 wt.%, based on the total polymer.

[0031] If necessary, the polyurethane polymer can be produced using plasticizers, provided that the plasticizers used do not contain groups reactive towards isocyanates.

[0032] Polyurethane polymers with the aforementioned content of free isocyanate groups are preferred, which are obtained from the reaction of diisocyanates with high molecular weight diols in an NCO:OH ratio of 1.5:1 to 2:1.

[0033] Suitable polyols for the production of the polyurethane polymer are in particular polyether polyols, polyester polyols and polycarbonate polyols, as well as mixtures of these polyols.Polyether polyols, also called polyoxyalkylene polyols or oligoetherols, are particularly suitable if they are polymerization products of ethylene oxide, 1,2-propylene oxide, 1,2- or 2,3-butylene oxide, oxetane, tetrahydrofuran, or mixtures thereof, optionally polymerized with the aid of a starter molecule with two or more active hydrogen atoms such as water, ammonia, or compounds with several OH or NH groups such as 1,2-ethanediol, 1,2- and 1,3-propanediol, neopentyl glycol, diethylene glycol, triethylene glycol, the isomeric dipropylene glycols and tripropylene glycols, the isomeric butanediols, pentanediols, hexanediols, heptanediols, octanediols, nonanediols, decanediols, undecanediols, 1,3- and 1 ,4-Cyclohexandimethanol, Bisphenol A, hydrogenated Bisphenol A, 1 ,1 ,1-Trimethylolethane, 1 ,1 ,1-Trimethylolpropane, Glycerol, Aniline, and mixtures of the aforementioned compounds.Both polyoxyalkylene polyols with a low degree of unsaturation (measured according to ASTM D-2849-69 (1980) and expressed in milliequivalents of unsaturation per gram of polyol (mEq / g)), produced for example using so-called double metal cyanide complex catalysts (DMC catalysts), and polyoxyalkylene polyols with a higher degree of unsaturation, produced for example using anionic catalysts such as NaOH, KOH, CsOH or alkali alcoholates, can be used.

[0034] Polyoxyethylene polyols and polyoxypropylene polyols are particularly suitable, especially polyoxyethylene diols, polyoxypropylene diols, polyoxyethylene triols and polyoxypropylene triols.

[0035] Particularly suitable are polyoxyalkylene diols or polyoxyalkylene triols with a degree of unsaturation of less than 0.02 mEq / g and with a weight-average molecular weight M win the range of 1000 to 30000 g / mol, as well as polyoxyethylene diols, polyoxyethylene triols, polyoxypropylene diols and polyoxypropylene triols with a weight-average molecular weight M wfrom 400 to 20,000 g / mol. Also particularly suitable are so-called ethylene oxide-terminated ("EOendcapped," ethylene oxide-endcapped) polyoxypropylene polyols. The latter are special polyoxypropylene polyoxyethylene polyols obtained, for example, by further alkoxylating pure polyoxypropylene polyols, especially polyoxypropylene diols and triols, after completion of the polypropoxylation reaction with ethylene oxide, thereby giving them primary hydroxyl groups. Polyoxypropylene polyoxyethylene diols and polyoxypropylene polyoxyethylene triols are preferred in this case. Also suitable are hydroxyl-terminated polybutadiene polyols, such as those produced by polymerization of 1,3-butadiene and allyl alcohol or by oxidation of polybutadiene, as well as their hydrogenation products.

[0036] Styrene-acrylonitrile grafted polyether polyols, such as those commercially available under the trade name Lupranol® from BASF Polyurethanes GmbH, Germany, are also suitable.

[0037] Polyester polyols are particularly suitable if they bear at least two hydroxyl groups and are produced by known processes, in particular the polycondensation of hydroxycarboxylic acids or the polycondensation of aliphatic and / or aromatic polycarboxylic acids with dihydric or polyhydric alcohols.

[0038] Particularly suitable are polyester polyols produced from dihydric to trihydric alcohols such as 1,2-ethanediol, diethylene glycol, 1,2-propanediol, dipropylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, glycerol, 1,1,1-trimethylolpropane, or mixtures of the aforementioned alcohols with organic dicarboxylic acids or their anhydrides or esters such as succinic acid, glutaric acid, adipic acid, trimethyladipic acid, cortic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, maleic acid, fumaric acid, dimer fatty acid, phthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid, dimethyl terephthalate, hexahydrophthalic acid, trimellitic acid, and trimellitic anhydride, or mixtures of the aforementioned acids, as well as polyester polyols made from Lactones such as e-caprolactone.

[0039] Polyester diamides are particularly suitable, especially those made from adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, dimer fatty acid, phthalic acid, isophthalic acid and terephthalic acid as dicarboxylic acids or from lactones such as e-caprolactone and from ethylene glycol, diethylene glycol, neopentyl glycol, 1,4-butanediol, 1,6-hexanediol, dimer fatty acid diol and 1,4-cyclohexane dimethanol as dihydric alcohols.

[0040] Suitable polycarbonate polyols include those obtained by reacting, for example, the alcohols mentioned above (used in the synthesis of polyester polyols) with dialkyl carbonates such as dimethyl carbonate, diaryl carbonates such as diphenyl carbonate, or phosgene. Polycarbonate dicarbonates, especially amorphous polycarbonate dicarbonates, are particularly suitable.

[0041] Other suitable polyols are poly(meth)acrylate polyols.

[0042] Also suitable are polyhydrocarbon polyols, also called oligohydrocarbonols, for example polyhydroxyfunctional ethylene-propylene, ethylene-butylene or ethylene-propylene-diene copolymers, such as those produced by Kraton Polymers, USA, or polyhydroxyfunctional copolymers of dienes such as 1,3-butanediene or diene mixtures and vinyl monomers such as styrene, acrylonitrile or isobutylene, or polyhydroxyfunctional polybutadiene polyols, for example those produced by copolymerization of 1,3-butadiene and allyl alcohol, which may also be hydrogenated.

[0043] Also suitable are polyhydroxy functional acrylonitrile / butadiene copolymers, such as those produced from epoxides or amino alcohols and carboxyl-terminated acrylonitrile / butadiene copolymers, which are commercially available under the name Hypro® (formerly Hycar®) CTBN from Emerald Performance Materials, LLC, USA.

[0044] These polyols preferably exhibit a weight-average molecular weight M w from 250 to 30000 g / mol, in particular from 1000 to 30000 g / mol, and / or a medium OH functionality in the range of 1.6 to 3.

[0045] Particularly suitable polyols are polyester polyols and polyether polyols, especially polyoxyethylene polyol, polyoxypropylene polyol and polyoxypropylene polyoxyethylene polyol, preferably polyoxyethylene diol, polyoxypropylene diol, polyoxyethylene triol, polyoxypropylene triol, polyoxypropylene polyoxyethylene diol and polyoxypropylene polyoxyethylene triol.

[0046] In addition to the polyols mentioned above, small amounts of low-molecular-weight dihydric or polyhydric alcohols such as 1,2-ethanediol, 1,2- and 1,3-propanediol, neopentyl glycol, diethylene glycol, triethylene glycol, the isomeric dipropylene glycols and tripropylene glycols, the isomeric butanediols, pentanediols, hexanediols, heptanediols, octanediols, nonanediols, decanediols, undecanediols, 1,3- and 1,4-cyclohexanedimethanol, hydrogenated bisphenol A, dimeric fatty alcohols, 1,1,1-trimethylolethane, 1,1,1-trimethylolpropane, glycerol, pentaerythritol, sugar alcohols such as xylitol, sorbitol or mannitol, sugars such as sucrose, other higher-molecular-weight alcohols, and low-molecular-weight alkoxylation products of the aforementioned may also be present. Dihydric and polyhydric alcohols as well as mixtures of the aforementioned alcohols are used in the production of the polyurethane polymer having terminal isocyanate groups.

[0047] Commercially available aliphatic, cycloaliphatic or aromatic polyisocyanates, especially diisocyanates, can be used as polyisocyanates for the production of the polyurethane polymer. Examples include diisocyanates whose isocyanate groups are bonded to an aliphatic, cycloaliphatic, or arylaliphatic carbon atom, also called "aliphatic diisocyanates," such as 1,6-hexamethylene diisocyanate (HDI), 2-methylpentamethylene-1,5-diisocyanate, 2,2,4- and 2,4,4-trimethyl-1,6-hexamethylene diisocyanate (TMDI), 1,12-dodecamethylene diisocyanate, lysine and lysine ester diisocyanate, cyclohexane-1,3-diisocyanate, cyclohexane-1,4-diisocyanate, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (= isophorone diisocyanate or IPDI), perhydro-2,4'-diphenylmethane diisocyanate, and perhydro-4,4'-diphenylmethane diisocyanate. ,4-Diisocyanato-2,2,6-trimethylcyclohexane (TMCDI), 1,3- and 1,4-Bis-(isocyanatomethyl)-cyclohexane, m- and p-Xylylene diisocyanate (m- and p-XDI),m- and p-tetramethyl-1,3-xylylene diisocyanate, m- and p-tetramethyl-1,4-xylylene diisocyanate, bis-(1-isocyanato-1-methylethyl)naphthalene; as well as diisocyanates with isocyanate groups bonded to an aromatic carbon atom, also called "aromatic diisocyanates", such as 2,4- and 2,6-toluene diisocyanate (TDI), 4,4'-, 2,4'- and 2,2'-diphenylmethane diisocyanate (MDI), 1,3- and 1,4-,

[0048] Phenylene diisocyanate, 2,3,5,6-tetramethyl-1,4-diisocyanatobenzene, naphthalene-1,5-diisocyanate (NDI), 3,3'-dimethyl-4,4'-diisocyanatodiphenyl (TODI); oligomers and polymers of the aforementioned isocyanates, as well as any mixtures of the aforementioned isocyanates.

[0049] For example, suitable methoxysilane-functional polymers P1 are commercially available under the trade name Polymer ST50 from Hanse Chemie AG, Germany, and under the trade name Desmoseal® from Bayer MaterialScience AG, Germany. Alternatively, ethoxysilane-functional polymers P1 can be used. In a second embodiment, the silane-functional polymer P can be a silane-functional polyurethane polymer P2, obtainable by reacting an isocyanatosilane IS with a polymer that has functional end groups reactive towards isocyanate groups, in particular hydroxyl groups, mercapto groups, and / or amino groups.This reaction takes place in a stoichiometric ratio of isocyanate groups to isocyanate-reactive functional end groups of 1:1, or with a slight excess of isocyanate-reactive functional end groups, for example at temperatures from 20°C to 100°C, optionally with the use of catalysts. The excess of isocyanate-reactive groups to isocyanate groups is preferably at most 1.1:1.

[0050] Compounds of formula (Ib) are suitable as isocyanatosilanes IS. where R 1 , R 2 , R 3 and have already been described previously.

[0051] Examples of suitable isocyanatosilanes IS of formula (Ib) are 3-isocyanato-propyltriethoxysilane, 3-isocyanatopropyldiethoxymethylsilane and their analogues with methoxy or isopropoxy groups instead of the ethoxy groups on the silicon.

[0052] Preferably, the polymer has hydroxyl groups as functional end groups that are reactive towards isocyanate groups. Suitable polymers containing hydroxyl groups include, on the one hand, the aforementioned high-molecular-weight polyoxyalkylene polyols, and preferably polyoxypropylene diols with a degree of unsaturation lower than 0.02 mEq / g and with a weight-average molecular weight M. w in the range of 4000 to 30000 g / mol, especially those with a weight-average molecular weight M w in the range of 8000 to 30000 g / mol.

[0053] On the other hand, polyurethane polymers containing hydroxyl groups, and in particular hydroxyl-terminated polyurethane polymers, are also suitable for reaction with isocyanatosilanes IS of formula (Ib). Such polyurethane polymers can be obtained by reacting at least one polyisocyanate with at least one polyol. This reaction can be carried out by reacting the polyol and the polyisocyanate using conventional methods, for example at temperatures of 50 °C to 100 °C, optionally with the use of suitable catalysts, wherein the polyol is dosed such that its hydroxyl groups are present in stoichiometric excess relative to the isocyanate groups of the polyisocyanate. A ratio of hydroxyl groups to isocyanate groups of 1.3:1 to 4:1, and in particular of 1.8:1 to 3:1, is preferred.The polyurethane polymer can optionally be produced using plasticizers, provided that the plasticizers do not contain groups reactive towards isocyanates. The same polyols and polyisocyanates that have already been mentioned as suitable for producing an isocyanate-containing polyurethane polymer, which is used to produce a silane-functional polyurethane polymer P1, are suitable for this reaction.

[0054] For example, suitable methoxysilane-functional polymers P2 are commercially available under the trade names SPUR+® 1010LM, 1015LM and 1050MM from Momentive Performance Materials Inc., USA, as well as under the trade names Geniosil® STP-E15, STP-10 and STP-E35 from Wacker Chemie AG, Germany, and under the trade name Incorez STP from Sika Incorez, UK. Alternatively, ethoxysilane-functional polymers P2 are used.

[0055] In a third embodiment, the silane-functional polymer P can be a silane-functional polymer P3 obtainable by a hydrosilylation reaction of polymers with terminal double bonds, for example poly(meth)acrylate polymers or polyether polymers, in particular allyl-terminated polyoxyalkylene polymers, as described, for example, in US 3,971,751 A and US 6,207,766 B2, the disclosures of which are hereby included.

[0056] For example, suitable methoxysilane-functional polymers P3 are commercially available under the trade names MS-Polymer® S203(H), S303(H), S227, S810, MA903, MA490, MA491 and S943, Silyl® SAX220, SAX350, SAX400 and SAX725, Silyl® SAT350 and SAT400, as well as XMAP® SA100S and SA310S from Kaneka Corp., Japan, and under the trade names Excestar® S2410, S2420, S3430, S3630, W2450 and MSX931 from Asahi Glass Co., Ltd., Japan. Alternatively, ethoxysilane-functional polymers P3 are used. Furthermore, it is also possible to use other commercially available silane-functional polymers as silane-functional polymer P, for example those available under the trade name Tegopac® from Evonik Industries, in particular Tegopac® Seal 100, Tegopac® Bond 150, Tegopac® Bond 250.

[0057] According to the invention, any mixtures of the silane-functional polymers described above can also be used.

[0058] The silane-functional polymer P is typically present in an amount of 10 to 80 wt.%, preferably in an amount of 15 to 60 wt.%, based on the total adhesive.

[0059] Furthermore, the adhesive comprises at least one catalyst for the crosslinking of silane-functional polymers selected from the group consisting of organotitanate and organozirconate. Catalysts from the organotitanate group are particularly preferred according to the invention. These catalysts especially include alkoxy groups, sulfonate groups, carboxyl groups, dialkyl phosphate groups, dialkyl pyrophosphate groups, and dialkyl diketonate groups.

[0060] Particularly suitable organotitanates are the following:

[0061] Titanium(IV) complex compounds with two 1,3-diketonate ligands, in particular 2,4-pentanedionate (=acetylacetonate), and two alcoholate ligands;

[0062] Titanium(IV) complex compounds with two 1,3-ketoesterate ligands, in particular ethyl acetoacetate, and two alcoholate ligands;

[0063] Titanium(IV) complex compounds with one or more amino alcoholate ligands, in particular triethanolamine or 2-((2-Aminoethyl)amino)ethanol, and one or more alcoholate ligands;

[0064] Titanium(IV) complex compounds with four alcoholate ligands; as well as higher condensed organotitanates, in particular oligomeric titanium(IV) tetrabutanolate, also known as polybutyl titanate.

[0065] Isobutoxy, n-Butoxy, Isopropoxy, Ethoxy and 2-Ethylhexoxy are particularly suitable as alcoholate ligands. Particularly suitable are Bis(ethylacetoacetato)-diisobutoxy-titanium(IV), Bis(ethylacetoacetato)-diisopropoxy-titanium(IV), Bis(acetyl-acetonato)-diisopropoxy-titanium(IV), Bis(acetylacetonato)-diisobutoxy-titanium(IV), Tris(oxyethyl)amine-isopropoxy-titanium(IV), Bis[tris(oxyethyl)amine]-diisopropoxy-titanium(IV), Bis(2-Ethylhexane-1,3-dioxy)-titanium(IV), Tris[2-((2-Aminoethyl)amino)ethoxy]-ethoxy-titanium(IV), Bis(Neopentyl(diallyl)oxy-diethoxy-titanium(IV), Titanium(IV)-tetrabutanolate, Tetra-(2-ethylhexyloxy)titanate, Tetra-(isopropoxy)titanate, Tetra-(2-methyl-2-propyloxy)titanate and polybutyltitanate.Particularly suitable are the commercially available types Tyzor® AA, GBA, GBO, AA-75, AA-65, AA-105, DC, BEAT, BTP, TE, TnBT, KTM, TOT, TPT, IBAY or 9000 (all from Du Pont / Dorf Ketal); Tytan PBT, TET, X85, TAA, ET, S2, S4 or S6 (all from TensoChema) and Ken-React® KR® TTS, 7, 9QS, 12, 26S, 33DS, 38S, 39DS, 44, 134S, 138S, 133DS, 158FS or LIGA® 44 (all from Kenrich Petrochemicals).

[0066] Particularly suitable organozirconates are the commercially available types Ken-React® NZ® 38J, KZ® TPPJ, KZ® TPP, NZ® 01, 09, 1238, 44 or 97 (all from Kenrich Petrochemicals) and Snapcure® 3020, 3030, 1020 (all from Johnson Matthey & Brandenberger).

[0067] The adhesive according to the invention for the assembly system is free of tin or organic tin compounds, since these are not sustainable for ecological and toxicological reasons.

[0068] The proportion of the catalyst is preferably 0.1 to 10 wt.%, in particular 0.2 to 4 wt.%, preferably 0.3 to 3 wt.%, most preferably 0.5 to 2.0 wt.%, of the total adhesive.

[0069] Furthermore, the adhesive comprises at least one base. Nitrogen-containing compounds are particularly suitable as bases. Specifically, the base is selected from guanidine, imidazole, imidazoline, bicyclic amidine, or derivatives of these compounds.

[0070] Preferred are amines such as N-ethyl-diisopropylamine, N,N,N',N'-tetramethylalkylenediamines, polyoxyalkyleneamines, 1,4-diazabicyclo[2.2.2]octane; aminosilanes such as in particular 3-aminopropyl-trimethoxysilane, 3-aminopropyl-dimethoxymethylsilane, N-(2-aminoethyl)-3-aminopropyl-trimethoxysilane, N-(2-aminoethyl)-3-aminopropyl-methyldimethoxysilane, N-(2-aminoethyl)-N'-[3-(trimethoxysilyl)propyl]ethylenediamine and their analogues with ethoxy or isopropoxy groups instead of methoxy groups on the silicon; Amidines such as, in particular, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), 6-dibutylamino-1,8-diazabicyclo[5.4.0]undec-7-ene; guanidines such as, in particular, tetramethylguanidine, 2-guanidinobenzimidazole, acetylacetoneguanidine, 1,3-diotolylguanidine, 2-tert-butyl-1,1,3,3-tetramethylguanidine; and imidazoles such as, in particular, N-(3-trimethoxysilylpropyl)-4,5-dihydroimidazole and N-(3-triethoxysilylpropyl)-4,5-dihydroimidazole.

[0071] The proportion of the base is preferably 0.01 to 3 wt.%, in particular 0.1 to 2 wt.%, preferably 0.2 to 1 wt.%, of the total adhesive.

[0072] Furthermore, the adhesive may contain additional components. These include, for example, plasticizers such as esters of organic carboxylic acids or their anhydrides, such as phthalates (e.g., dioctyl phthalate, diisononyl phthalate, or diisodecyl phthalate), or hydrogenated phthalates (e.g., Hexamoll DINCH), adipates (e.g., dioctyl adipate), sulfonates (e.g., Mesamoll (Lanxess)), azelates and sebacates, polyols (e.g., polyoxyalkylene polyols or polyester polyols), organic phosphoric and sulfonic acid esters, or polybutenes; solvents; fibers (e.g., polyethylene); dyes; and pigments. Rheology modifiers such as thickening agents or thixotropic agents, for example urea compounds of the type described as thixotropic agents ("Thixotropy endowning agent") in WO 02 / 48228 A2 on pages 9 to 11, polyamide waxes, bentonites or pyrogenic silicas;Adhesion promoters, for example epoxysilanes, (meth)acrylsilanes, anhydridosilanes or adducts of the aforementioned silanes with primary aminosilanes, as well as aminosilanes or ureasilanes; crosslinking agents, for example silane-functional oligo- and polymers; stabilizers, for example against heat, light and UV radiation; flame retardants; surfactants such as wetting agents, leveling agents, deaerating agents or defoamers; biocides such as algicides, fungicides or fungal growth inhibitors, as well as other substances commonly used in moisture-curing compositions.

[0073] A plasticizer is understood to be a substance that reduces the viscosity of the compositions, thereby facilitating their processability and furthermore improving their flexibility and elongation. A suitable amount of plasticizer is, for example, in the range of 5 to 50 wt.%, particularly 10 to 40 wt.%, preferably 15 to 30 wt.%, based on the total adhesive. In a preferred embodiment, the adhesive is essentially phthalate-free or phthalate-free. In particular, the adhesive preferably contains no phthalate plasticizers. Preferred plasticizers are, for example, polyols.

[0074] Surprisingly, it was found that, in addition to the use of an organotitanate catalyst, the choice of the essential drying agent is crucial for increasing the shelf life of the liquid adhesive, thus achieving label-free status without any limitations compared to the prior art regarding the curing time of the adhesive and the holding performance of the assembly system. Drying agents according to the invention comprise polysiloxanes containing vinyl and methoxy groups. Particularly suitable are the commercially available types Dynasylan® 6490 or 6498; SISIB® VP6090; and Silquest® G-170 or e-free 172.

[0075] In a further embodiment, additional drying agents can optionally be added, for example in the form of monomeric systems such as tetraethoxysilane, vinyltriethoxysilane, α-functional silanes such as N-(silylmethyl)-O-methyl-carbamates, in particular N-(methyl-diethoxysilylmethyl)-O-methyl-carbamate,

[0076] (Methacryloxymethyl)silanes, ethoxymethylsilanes, N-phenyl, N-cyclohexyl and N-alkylsilanes, orthoformic acid esters, calcium oxide or molecular sieves may be used.

[0077] According to a preferred embodiment, the liquid adhesive according to the invention contains, in addition to the oligomeric water scavengers such as polysiloxanes containing vinyl groups and methoxy groups, no further drying agents in the form of monomeric systems; in particular, the use of tetraethoxysilane, vinyltriethoxysilane, α-functional silanes such as N-(silylmethyl)-O-methyl carbamates, in particular N-(methyl-diethoxysilylmethyl)-O-methyl carbamate, (methacryloxymethyl)silanes, ethoxymethyl silanes, N-phenyl-, N-cyclohexyl- and N-alkylsilanes, orthoformic acid esters, calcium oxide or molecular sieves, each individually, in any combination or all, is excluded.

[0078] Furthermore, so-called reactive diluents can optionally be used, which are incorporated into the polymer matrix during the curing of the adhesive, particularly through reaction with the silane groups. Preferably, the adhesive also comprises a filler. The filler influences both the rheological properties of the uncured adhesive and the mechanical properties and surface finish of the cured adhesive.

[0079] Suitable fillers include inorganic and organic fillers, for example, natural, ground, or precipitated calcium carbonates, optionally coated with fatty acids, particularly stearic acid; barium sulfate (BaSO4, also known as barite or barite); calcined kaolins; aluminum oxides; aluminum hydroxides; silicas, especially highly dispersed silicas from pyrolysis processes; carbon blacks, especially industrially produced carbon black; PVC powders; or hollow spheres. Preferred fillers are calcium carbonates, calcined kaolins, carbon black, highly dispersed silicas, and flame-retardant fillers such as hydroxides or hydrates, especially hydroxides or hydrates of aluminum, preferably aluminum hydroxide. It is entirely possible, and can even be advantageous, to use a mixture of different fillers.

[0080] A suitable amount of filler is, for example, in the range of 10 to 70 wt.%, in particular 15 to 60 wt.%, preferably 30 to 60 wt.%, based on the total adhesive.

[0081] By using open-pore material for at least part of the fastener, increased amounts of air, and therefore humidity, can be supplied to the liquid adhesive without additional effort, as the ingress of ambient air to the liquid adhesive is very intensive. Furthermore, moistening the open-pore area of ​​the fastener can further increase the supply of humidity.

[0082] In a further development of the invention, a closure element that can be inserted into the filling opening after filling is also used as a pressure element for inserting the liquid adhesive into the said mold structure and for at least partially squeezing it out of the filling channel.

[0083] It is also preferred that the front side of the base body facing away from the wall is at least partially covered by a protective element after the base body has been filled with the adhesive, preferably after it has evaporated or hardened.

[0084] It is advantageous that the base body is designed as a one-piece round molded part and preferably has an opening between each of the (rising) openings arranged therein. Furthermore, it is preferably provided that these (rising) openings are arranged concentrically around the filling opening in the base body.

[0085] A preferred embodiment is seen in which a moisture- and gas-permeable element, preferably mechanically fastened in a recess in the rear of the base body, is designed as a perforated plate.

[0086] Alternatively, it is also provided that a liquid- and gas-permeable element, consisting of at least a single layer of gauze, is provided and is radially and firmly attached to the inside of a recess in the back of the base body.

[0087] Further development can be seen in the fact that the liquid adhesive, especially in the case of multi-layered gauze inserts arranged in the recess on the back of the base body, passes directly through the gauze, so that fewer or no rising openings in the base body are necessary, which reduces the manufacturing effort.

[0088] The use of moisture- and / or gas-permeable elements ensures that the gas produced during the curing of the liquid adhesive can escape, or that fleeing binders can evaporate (evaporation), while at the same time allowing ambient air to reach the adhesive and bonding agent.

[0089] Another advantageous embodiment of a fastener is characterized by the arrangement of through-holes in the base body, preferably concentric to the filling opening, filled with a sponge-like, open-pored material, so that the excess liquid adhesive flows directly through the pores of the sponge-like material, preferably in sections, while simultaneously allowing air present in the openings of the base body and gases generated during the curing of the liquid adhesive to escape, and ensuring contact with the ambient air. A preferred variant is the filling of the through-holes with gauze material.

[0090] Another preferred embodiment involves providing a ring of sponge-like material in the recess on the back of the base body. The contact surface of this ring, used for pre-fixing the base body, has an adhesive surface in a known manner, and its thickness defines the boundary of the adhesive joint. This sponge-like ring also allows the gases produced during the curing of the liquid adhesive to escape and the air to enter.

[0091] In addition to the advantages regarding improved application of the liquid adhesive, a further advantage of the design of the base body is that the contact area between the liquid adhesive and the base body has been increased many times over compared to known solutions, thus simultaneously increasing the load-bearing capacity - the forces that can be absorbed - which is particularly due to the combination of the liquid adhesive and the fastening element according to the invention.

[0092] A preferred embodiment of the protective element, which is both manufacturing-efficient and material-saving, consists in the protective element being cap-shaped and detachably attached to the base body, and having at least one receiving element for holding objects. Furthermore, it is advantageously provided that this cap-shaped protective element additionally or alternatively has a through-opening through which a connecting element can be inserted into the base body, or that the cap-shaped protective element is designed as a closed decorative cap into which, if required, retaining elements, such as self-tapping screws or similar elements, can be inserted, which, if necessary, can also penetrate into the base body.

[0093] The mounting system according to the invention, in combination with a moisture-curing liquid adhesive, is characterized in that the different embodiments of the fastening elements are attached directly to a wall and different objects can be mechanically fastened to them in a known manner, so that no drilling is required, thereby increasing the fastening options for the objects and enabling fastenings to be made on inaccessible wall sections and walls of various surfaces without damaging the wall surface.

[0094] The inventive design of the mounting system, comprising the fastening element and the moisture-curing liquid adhesive, enables simple, secure, and quick fastening of various objects to walls, floors, and ceilings, to metal or glass surfaces, or even mirrors, without drilling. If, in certain cases, fastening according to the inventive method is not possible due to the nature of the substrate (wall surface), for example, a plasterboard wall or similar material, the preferred base bodies, which have one or more access openings or bores, can be fastened using one or more screws that can be inserted through the openings or bores in the base body. However, it is also within the scope of the invention if the new base bodies are provided with additional through-holes or elongated holes for such occasionally necessary fastenings.

[0095] A further advantage of the invention is that this new combination of a mounting system with a label-free, moisture-curing liquid adhesive can be used without further modifications for commercially available sanitary ware and accessories, such as towel rails, mirror holders, hairdryer holders, console brackets, lights, containers for washing emulsions, and similar items. In specific applications, the base body and the protective element adapted to it can also have a shape other than round, for example, an oval, prismatic, truncated pyramid, or a combined or other shape.

[0096] The new assembly system can be manufactured using a wide variety of processes, such as pressing or injection molding of plastics, sintering, turning, drilling, milling, casting, and other methods, which can be used individually or in combination. In particular, the base body can be a homogeneous body or a body assembled from several individual parts. The invention is described in more detail below with reference to exemplary embodiments schematically illustrated in the drawings, as also disclosed in DE 101 52 052 A1. The drawings show:

[0097] Figure 1 shows a first embodiment of a basic body of the fastening element in section;

[0098] Fig. 1a the preferably arranged on a wall

[0099] Fastening element according to Fig. 1;

[0100] Figure 2 shows the basic body from Figure 1 in top view;

[0101] Figure 3 shows a second embodiment of the base body of the

[0102] Fastener in cross-section;

[0103] Figure 4 shows the basic body according to Figure 3 in top view;

[0104] Figure 5 shows a third embodiment of the basic body of the

[0105] Fastener in cross-section;

[0106] Figure 6 shows the basic body according to Figure 5 in top view;

[0107] Figure 7 shows a fourth embodiment of the basic body of the

[0108] Fastener in cross-section;

[0109] Figure 8 shows the basic body according to Figure 7 in top view;

[0110] Figure 9 shows a fifth embodiment of the base body of the

[0111] Fastening element in section;

[0112] Figure 10 shows the basic body according to Figure 9 in top view;

[0113] Figure 11 shows another embodiment of the base body of the fastening device in section;

[0114] Figure 12 shows the basic body according to Figure 11 in top view;

[0115] Figure 13 shows a first embodiment of a protective element in section;

[0116] Figure 14 shows a second embodiment of a protective element in section and Figure 15 shows a third embodiment of a protective element in section.

[0117] Figures 1 to 12 show a base body 1 of the mounting system according to the invention in various embodiments. The base body 1 of a fastening element, which is to be attached to a wall 22 shown in Fig. 1a, for example a tile, is first pre-positioned on the wall 22 by means of an adhesive (not shown). The liquid adhesive is then metered through the filling opening 2 arranged in the base body 1. The liquid adhesive spreads and expands in the recess 4 arranged in the rear side 3 of the base body 1 until the area of ​​the wall 22 covered by the recess 4 is wetted with the adhesive. The base body 1 is advantageously a single piece, round and / or made of plastic, and has (climbing) openings 5, between which openings 7 – here three – are formed.The front side of the base body 1 facing away from the wall 22 is covered after the base body 1 has been filled with the liquid adhesive by means of a protective element 15, in particular a cap-shaped one - see Figures 13 to 15 - and is thus closed off visibly and at the same time protected, so that water and limescale deposits and mold formation are prevented, wherein the cap-shaped protective element 15 has a receiving element 16 for holding stationary objects such as shelves, towel rails, lights, fixing brackets or similar fittings.

[0118] In the embodiment shown in Figures 1 and 2, the excess liquid adhesive flows out through the (rising) openings 5 ​​in the base body 1 and partially through the moisture- and gas-permeable element 6, which is arranged in the recess 4 in the rear of the base body 1 and mechanically fastened. This element is provided in the form of a perforated plate or a single- or multi-layered gauze insert. This perforated plate and the gauze insert allow the gas produced during the curing of the liquid adhesive to escape. For this purpose, at least one additional opening 7 – here three – is also arranged in the base body 1 between the rising openings 5. At the same time, however, ambient air, especially humidity, can also reach the liquid adhesive, which accelerates the curing process in the case of moisture-curing adhesives, particularly SMP adhesives.

[0119] In the embodiment of the base body 1 shown in Figures 3 and 4, no rising openings are provided. In this embodiment of the base body 1, the excess liquid adhesive flows off via the moisture- and gas-permeable element 6.

[0120] The embodiment of the base body 1 according to Figures 5 and 6 preferably includes through-holes 8 arranged concentrically to the filling opening 2, in which a sponge-like material 9 is provided. After the liquid adhesive has been metered and poured through the filling opening 2, this sponge-like material 9 partially absorbs the excess liquid adhesive and allows both the escape of air contained in the base body 1 during filling and the escape of gases produced during the curing of the liquid adhesive, as well as the passage of ambient air to the liquid adhesive.

[0121] As in the embodiments according to Figures 1 to 4, here too, in the embodiment according to Figures 5 and 6, the sponge-like material 9 used here as an alternative to the moisture- and gas-permeable element 6 is mechanically firmly connected to the base body 1 in a suitable manner in a known way.

[0122] In a further embodiment of the base body 1 according to Figures 7 and 8, the entire base body 1 consists of an open-pore material which allows the air located in the recess of the base body 1 to escape during filling, as well as the escape of the gas produced during the curing of the liquid adhesive or the escaping binders, and the contact of ambient air, including the humidity contained therein, with the liquid adhesive, and which at the same time partially, that is to a small extent, absorbs the excess liquid adhesive after it has been poured into the base body 1 via the filling opening 2.

[0123] Figures 9 and 10 show an advantageous embodiment of the base body 1, which has a plurality of preferably small bores 10 passing through the base body 1, which also receive excess liquid adhesive after it has been poured into the base body 1 via the filling opening 2 and allow the escape of air and gases produced during curing.

[0124] In the further advantageous embodiment shown in Figures 11 and 12, a ring 11 made of sponge-like material is associated with the base body 1 and is arranged in a recess 12, preferably near the edge, in the rear side 3 of the base body 1. Because at least one of the end faces of the ring 11 has an adhesive surface 13, the base body 1 can be pre-fixed in a known manner. The thickness 19 of the ring 11 forms the recess 4' between the rear side 3 of the base body 1 and a wall (not shown). Due to its sponge-like, and in particular hard sponge-like, material structure, the ring 11 also allows the gases or binders produced during the curing of the liquid adhesive to escape and enables contact between the ambient air and the liquid adhesive.The excess liquid adhesive flows into, in particular, concentrically arranged (rising) openings 14, wherein the filling opening 2 for the liquid adhesive is not arranged centrally in the base body 1, but preferably can be one of the radially arranged rising openings 14.

[0125] Figures 13 to 15 show embodiments of a protective element 15, preferably cap-shaped. The cap-shaped protective element 15 according to Figure 13 is provided with a thread 17 on its inner surface and can be screwed onto the base body 1 by means of this thread 17. Additionally, the protective element 15 has a stationary receiving element 16, preferably on its surface facing away from the wall, which is attached to the protective element 15 by force-fit and / or form-fit. This receiving element 16 serves to connect to a part of the mounting of a commercially available consumer product for the sanitary or kitchen area, as mentioned earlier.The receiving element 16, shown here in the form of a threaded bolt, can also be part of a plug connection, for example a clip element or a guide, such as a dovetail guide with a tapered, self-locking design, or another element of known connection technology. This receiving element can also be provided on the outer surface of the protective element 15.

[0126] The embodiment of the protective element 15 according to Figure 14 has a through-hole 18 through which a connecting element of a sanitary article or kitchen article, not shown in detail, which is known per se, can be inserted into the base body 1.

[0127] Figure 15 shows an embodiment of the protective element 15, which is provided only as a closed decorative cap, into which retaining elements, for example self-tapping screws, can also be inserted if required, which usually also engage in the base body.

[0128] Experimental section

[0129] Measurement methods:

[0130] Shore A hardness (measurement method M1): The Shore A hardness is measured after 24 h curing time at 23 °C and 50 % rh according to DIN 53 505 / ISO 868 using a durometer A.

[0131] Elongation at break (measurement method M2):

[0132] The elongation at break is measured after 24 hours of curing time at 23 °C and 50% rh according to DIN 53 504 / ISO 37 and is given in %.

[0133] Tensile strength (measurement method M3):

[0134] The tensile strength is measured after a 24-hour curing time at 23 °C and 50% rh according to DIN 53 504 / ISO 37 and is expressed in N / mm². 2 specified.

[0135] Tensile strength (measurement method M4):

[0136] The tensile strength is measured after a 24-hour curing time at 23 °C and 50% rh according to ISO 34-1 Method B and is given in kN / m.

[0137] Viscosity (measurement method M5):

[0138] Viscosity was determined using a thermostatically controlled cone-plate viscometer Rheotec RC30 (cone diameter 50 mm, cone angle 1°, cone tip-plate distance 0.05 mm, shear rates: 0.1; 0.5; 5 and 10 s). -1 ) measured at 20 °C. Viscosity is given in Pa s.

[0139] Determination of water content by Karl Fischer titration (measurement method M6):

[0140] The water content was automatically determined using the Eco KF titrator from Metrohm at 23 °C and 50% rh and is given in ppm (parts per million).

[0141] Shear test (measurement method M7):

[0142] The test substrate (standardized to a matte tile: Mosaico Solo, white matte, R) a = 1.3 ± 1 pm, R z The substrate (6.1 ± 1.0 pm) is cleaned with isopropanol before the base body is attached. Afterwards, the substrate is left to evaporate for at least 10 minutes.

[0143] To prepare the test samples, the adapter is first applied to the substrate using a suitable base body from the tesa® Power. Kit (standardized to a 5 kg adapter made of a porous copper sintered plate). This base body is then filled with the appropriate adhesive, allowing the adhesive to be slightly squeezed out through the smaller outlet opening. The cavity beneath the base body is thus completely filled with the adhesive. The adhesive must then cure for at least 24 hours at 23 °C and 50% relative humidity. Any shortfall or exceeding of this curing time is noted.

[0144] After curing, the corresponding shear measurement can be started using a tensile testing machine. For measuring the shear force, the substrate, including the base body, is clamped in a fixture specifically designed for this measurement method. The punch is moved to just above the base body. This is the starting point of the measurement.

[0145] After the measurement begins, the plunger presses the base downwards, absorbing the force required to remove the base from the surface. The recorded maximum force is noted as the shear force to be evaluated.

[0146] To obtain valid results, at least four tests have proven suitable.

[0147] Unless otherwise agreed, thrust is given in N (Newtons) rounded to the nearest whole number.

[0148] Deviations from the described standard conditions or the parameters of the Zwick method noted in the appendix must be recorded in the test report.

[0149] Load test of fastening element (measurement method M8):

[0150] The test surface (standardized to a smooth tile: Villeroy & Boch, Unit Two series, glossy white, R) a = 0.05 ± 0.02 pm, R z The substrate (0.5 ± 0.2 pm) is cleaned with isopropanol before the base body is attached. Afterwards, the substrate is left to evaporate for at least 10 minutes.

[0151] To prepare the test samples, the base body is first applied to the corresponding substrate, using a suitable base body from the tesa® Power. Kit according to the weight specifications of the fastener. This base body is then filled with the appropriate adhesive, allowing the adhesive to be slightly squeezed out through the smaller outlet opening. The cavity beneath the base body is thus completely filled with the adhesive. The adhesive must then be cured for at least 24 hours at 23 °C and 50% relative humidity. Any shortfall or exceeding of this curing time is noted.

[0152] After curing, the protective element and the accessory are attached to the base body, and the resulting fastener is subjected to a uniform load of both the advertised weight and twice the advertised weight. The tests are performed a) at 23 °C and 50% rh and b) at 23 °C and 50% rh, with the fastener being moistened three times daily for 15 minutes using 40 °C warm water via a shower head. Tests a) and b) are passed if the fastener withstands twice the advertised weight for at least 5 weeks. Molecular weight

[0153] The molecular weight determinations of the weight-mean molecular weights M w The measurements are performed using gel permeation chromatography (GPC). THF (tetrahydrofuran) with 0.1 vol% trifluoroacetic acid is used as the eluent. The measurement is performed at 23 °C. A PSS-SDV, 10 p, 10 column is used as the guard column. 3 Ä, ID 8.0 mm x 50 mm is used. The columns PSS-SDV, 10 p, 10 are used for separation.3 Ä and 10 5 A and 10 7 A sample with an ID of 8.0 mm x 300 mm was used. The sample concentration was 0.5 g / l, and the flow rate was 0.5 ml per minute. Calibration was performed using the commercially available ReadyCal kit for poly(styrene) high from PSS Polymer Standard Service GmbH, Mainz, Germany. The values ​​were then universally converted to polymethyl methacrylate (PMMA) using the Mark Houwink parameters K and alpha, so that the data were given in PMMA mass equivalents.

[0154] Commercially available, used chemicals I. Production of the moisture-curing SMP adhesives SMP1 to SMP5

[0155] All examples are illustrative in the sense of the invention and are not intended to limit it.

[0156] The cooling water of a conventional 800 L planetary mixer and kneader (Netzsch PMH 600) was set to 10 °C. Subsequently, 200.5 kg of silane-modified polymer S943, 140.6 kg of ImmerSeal® 36S, 39.6 kg of Aerosil® R8200, and 5.9 kg of AddWorks® IBC 760 were successively added to the open mixer. The mixer was closed, and the raw materials were stirred for 5 to 10 minutes until a homogeneous, viscous mass was achieved. The mixer operated at a speed of 60 rpm, and a dispersing disc was additionally used at 110 rpm. Following this, 150.1 kg of Winnofil® SPM was added via the chute at a stirring speed of 30 rpm. After complete addition, the dispersing disc was again operated at 110 rpm. 9.9 kg of Dynasylan® 6490 were added and dispersed for a further 5 to 10 minutes at 110 rpm until the mass no longer appeared shiny.The mixture was then dispersed under vacuum for a further 20 minutes to remove any remaining water. During this process, the disperser speed could be briefly increased to 300 rpm, ensuring that the internal mixer temperature did not exceed 70 °C. The vacuum was then broken with nitrogen, and an additional 13.9 kg of Dynasylan® 6490 was added via the chute in a nitrogen countercurrent flow and dispersed for 5 minutes. 5.1 kg of Dynasylan® AMMO was also added via the chute in a nitrogen countercurrent flow and dispersed for another 5 minutes. As the penultimate step, 53.5 kg of Diprop DME was added and stirred for 20 to 25 minutes at 45 rpm, with the dispersing disc also running at 110 rpm. Care must be taken to ensure that the Diprom DME is completely mixed in - if the mixture has a slight sheen, it must be stirred further - and that the internal temperature of the mixer cools below 40 °C.As a final step, 10.9 kg of the catalyst Tyzor® 9000 was mixed in, the mixture was vacuum-sealed for 10 minutes, and the vacuum was broken with nitrogen. The adhesive is now active and ready for use. SMP adhesive.

[0157] The adhesive was produced analogously to the process described for SMPI, wherein the formulation according to the invention is composed as follows:

[0158] Silane-modified polymer MA903 215.5 kg

[0159] ImmerSeal® 36S 150.2 kg

[0160] Aerosil® R8200 35.6 kg

[0161] Add Works® IBC 760 5.9 kg

[0162] Winnofil® SPM 140.9 kg

[0163] Dynasylan® 6490 15.0 kg

[0164] Dynasylan® AMMO 6.1 kg

[0165] Diprop DME 57.2 kg

[0166] Tyzor® 9000 10.9 kg

[0167] SMP adhesive 3.LSMP3):

[0168] The adhesive was produced analogously to the process described for SMPI, wherein the formulation according to the invention is composed as follows:

[0169] Silane-modified polymer MA491 100.0 kg

[0170] ImmerSeal® 36S 73.0 kg

[0171] Aerosil® R8200 20.0 kg

[0172] Add Works® IBC 760 3.0 kg

[0173] Winnofil® SPM 75.0 kg

[0174] Dynasylan® 6490 12.0 kg

[0175] Dynasylan® AMMO 2.6 kg

[0176] Diprop DME 27.0 kg

[0177] Tyzor® 9000 5.5 kg

[0178] The adhesive was produced analogously to the process described for SMPI, wherein the formulation according to the invention is composed as follows:

[0179] Silane-modified polymer MA903 215.5 kg

[0180] ImmerSeal® 36S 150.2 kg

[0181] Aerosil® R8200 35.6 kg

[0182] Add Works® IBC 760 5.9 kg

[0183] Winnofil® SPM 140.9 kg

[0184] Dynasylan® 6490 15.0 kg

[0185] Dynasylan® AMMO 6.1 kg Diprop DME 57.2 kg

[0186] Catalyst TD 18 10.9 kg yerg.leichsbei spiel.. SM P- Adhesive 5 (SM P5 L Water catcher ..VTM O ..instead of . one a

[0187] Vinyl groups and methoxy groups : en^ polysioxane-based (using methods).:

[0188] The adhesive was produced analogously to the method described for SMP1, wherein the formulation according to the invention is composed as follows:

[0189] Silane-modified polymer MA903 215.5 kg

[0190] ImmerSeal® 36S 150.2 kg

[0191] Aerosil® R8200 35.6 kg

[0192] Add Works® IBC 760 5.9 kg

[0193] Winnofil® SPM 140.9 kg

[0194] Dynasylan® VTMO 15.0 kg

[0195] Dynasylan® AMMO 6.1 kg

[0196] Diprop DME 57.2 kg

[0197] Tyzor® 9000 10.9 kg

[0198] The results in Table 1 show that both the SMP adhesives according to the invention SMP1 - SMP3 and the comparative examples SMP4 - SMP5 generally exhibit good adhesive properties after being cross-linked for 24 h at 23 °C and 50 % rh, but that only the adhesive formulations according to the invention have the desired exemption from labeling requirements according to the European Chemicals Regulation (EC) No. 1272 / 2008 (CLP) and the regulation of end-user products in the USA by the Occupational Safety and Health Administration (OSHA).

[0199] Table 1: SMP adhesive examples SMP1 - SMP3 and comparison examples SMP4 - SMP5 - Adhesive properties after 24 h curing at 23°C and 50% rHg

[0200] The following accessories were tested in the load test of the fastener (M8). Table 2: Accessories in the M8 load test with weight specification and lever arm.

[0201] The fasteners listed in Table 2, when used with all SMP adhesives SMP1 - SMP5, passed tests a) and b) of test method M8 with double the stated weight load for at least 5 weeks. Reference number index

[0202] 1 : Basic body

[0203] 2: Filling opening

[0204] 3: Back side of the base body

[0205] 4, 4': Recess in the back of position 1

[0206] 5: Openings (ventilation or riser openings)

[0207] 6: liquid- and gas-permeable element

[0208] 7: Breakthrough

[0209] 8: Through hole

[0210] 9: sponge-like material

[0211] 10: Drilling

[0212] 11 : Ring

[0213] 12: Recess in the back

[0214] 13: Adhesive surface

[0215] 14: Ascent opening

[0216] 15: Protective element

[0217] 16: Recording element

[0218] 17: Thread in the protective element

[0219] 18: Through hole in the protective element

[0220] 19: Thickness of position 11

[0221] 20: Adhesive or bonding agents

[0222] 21: Direction of filling

[0223] 22: Wall

Claims

1. Patent claims 1. Mounting system comprising a fastening element and a liquid adhesive, wherein i) the fastening element has a base body and is designed to receive an element for holding the object, and the base body has on its rear side facing the wall a recess and a filling opening opening into the latter, which serves to introduce the liquid adhesive between the fastening element and the wall, and ii) the liquid adhesive is a moisture-curing SMP adhesive (SMP = silane-modified polymer) and comprises an organotitanate or organozirconate catalyst, at least one base such as a nitrogen-containing compound, and an oligomeric water scavenger.

2. Mounting system according to claim 1, characterized in that the fastening element has at least one opening permeable to moisture and gas.

3. Mounting system according to claim 1 or 2, characterized in that the base body and / or the back of the base body facing the wall consists at least in a partial area of ​​an open-pored material, so that they are permeable to moisture and / or gas.

4. Mounting system according to at least one of claims 1 to 3, characterized in that the front side of the base body (1) facing away from the wall can be covered and / or closed by means of a closure element (15) after the base body (1) has been filled with the adhesive.

5. Mounting system according to at least one of the preceding claims, characterized in that the front side of the base body facing away from the wall is, after filling the The base body is at least partially covered with the adhesive by means of a protective element.

6. Assembly system according to at least one of the preceding claims, characterized in that the base body (1) is in particular designed as a one-piece and round molded part and preferably has a through-hole between each of the (climbing) openings arranged in it.

7. Mounting system according to at least one of the preceding claims, characterized in that the liquid- and gas-permeable part(s) of the base body (1) are formed by at least one element (6) mechanically attached to the latter (1).

8. Mounting system according to claim 7, characterized in that the element (6) is a perforated plate which is arranged in the recess (4) in the rear (3) of the base body (1).

9. Mounting system according to claim 7, characterized in that the liquid- and gas-permeable element (6) located radially inside the recess (4) in the rear (3) of the base body (1) is designed as a single- or multi-layered gauze insert.

10. Assembly system according to at least one of claims 1 to 6, characterized in that through bores (8) filled with a sponge-like or hard sponge-like, open-pore material (9) are arranged concentrically to the filling opening (2) in the base body (1).

11. Assembly system according to at least one of claims 1 to 6, characterized in that the entire base body (1) consists of an open-pore material.

12. Assembly system according to at least one of the preceding claims, characterized in that the liquid adhesive is a moisture-curing liquid adhesive comprising preferably i) at least one silane-functionalized polymer (SMP), ii) at least one catalyst from the group of organotitanates or organozirconates, iii) at least one base such as a nitrogen-containing compound, in particular selected from guanidine, imidazole, imidazoline, bicyclic amidine or from derivatives of these compounds, iv) at least one polysiloxane-based drying agent containing vinyl groups and methoxy groups, and v) no tin or organotin compounds.

13. Assembly system according to claim 12, characterized in that the silane-functionalized polymer (SMP) is a silane-functionalized polymer P comprising one, two or more groups, preferably end groups, of formula (I) where the remainder R 1for an alkyl group with 1 to 8 carbon atoms, in particular for a methyl or for an ethyl group, the residue R 2 for an acyl or alkyl group with 1 to 5 carbon atoms, in particular for a methyl or for an ethyl or for an isopropyl group, preferably for a methyl or ethyl group, the remainder R 3 for a linear or branched, optionally cyclic, alkylene group with 1 to 12 C atoms, optionally with aromatic components, and optionally with one or more heteroatoms, in particular with one or more nitrogen atoms, where the index a represents a value of 0 or 1 or 2, in particular a value of 0.

14. Assembly system according to claim 12, characterized in that the silane-functional polymer P is a silane-functional polyurethane polymer P1, which is obtainable by reacting a silane, which has at least one group reactive towards isocyanate groups, with a polyurethane polymer, which has isocyanate groups.

15. Assembly system according to claim 12, characterized in that the silane-functional polymer P is a silane-functional polymer P3 which is obtainable by a hydrosilylation reaction of polymers with terminal double bonds, for example poly(meth)acrylate polymers or polyether polymers, in particular allyl-terminated polyoxyalkylene polymers.

16. Assembly system according to at least one of claims 12 to 15, characterized in that the catalyst is selected from the group Titanium(IV) complex compounds with two 1,3-diketonate ligands, in particular 2,4-pentanedionate (=acetylacetonate), and two alcoholate ligands; Titanium(IV) complex compounds with two 1,3-ketoesterate ligands, in particular ethyl acetoacetate, and two alcoholate ligands; Titanium(IV) complex compounds with one or more amino alcoholate ligands, in particular triethanolamine or 2-((2-Aminoethyl)amino)ethanol, and one or more alcoholate ligands; Titanium(IV) complex compounds with four alcoholate ligands; as well as higher condensed organotitanates, in particular oligomeric titanium(IV) tetrabutanoate.

17. Assembly system according to at least one of claims 12 to 16, characterized in that the drying agent comprises one or more polysiloxanes containing vinyl groups and methoxy groups.

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