Patent Application
20210253487
The present invention relates to a building waterproofing kit-of-parts, in particular a masonry waterproofing kit-of-parts. The invention also relates to the use of the kit-of-parts according to the invention for the waterproofing of buildings, in particular masonry, e.g. damp masonry, for the removal of moisture damage in a building, in particular masonry, for the moisture sealing of buildings, in particular masonry, and for the formation of a moisture barrier in buildings, in particular in masonry. The invention further relates to a liquid building waterproofing agent, in particular masonry waterproofing agent, and its use.
Moisture damage to buildings regularly not only diminishes living quality and undermines hygiene standards, but sometimes also contributes to a significant reduction in property value. If moisture damage to buildings is not rectified, or only rectified at a later stage, permanent damage can occur to the building substance or structural damage may result, such as the washing out of salts from mineral building materials or the entrance of salts into porous building materials. In the latter case, the hygroscopic nature of the masonry continuously increases, leading to increased formation of moisture damage. If, for example, moisture enters a cellar space, the high humidity that results and the subsequent formation of mold can render the cellar unusable. Once moisture has entered masonry, it also enters higher areas due to the capillary effect in porous building materials, and also causes damage where the masonry is not directly exposed to moisture. Damage to the outer seal or the foundation of a building is often responsible for water entry.
Subsequently suppressing moisture damage to buildings or fully rectifying the problem often entails a considerable degree of effort. For example, outer walls may need to be exposed, sections of the masonry might need to be removed, and a reliable and permanent moisture insulation may need to be re-applied, usually after the masonry that has been exposed to moisture has fully dried out. For a person skilled in the art, moisture damage to masonry is a substantial challenge, particularly in cellar areas, when the outer side cannot be exposed. And rectifying moisture damage to heritage-listed buildings generally involves high costs, since changes cannot be made to the building substance.
Numerous methods are known to a person skilled in the art in order to repair moisture damage. In many cases, attempts are made to attach a waterproof seal to the outer surface of the affected masonry. According to DE 40 31 745 C2, a polymer/bitumen emulsion can be used for this purpose. DE 41 27 351 C2 also describes a multi-layer system of an alkaline primer containing silicone, a mineral cement interim layer and a polymer dispersion modified mineral cement coating. If the moisture damage can only be repaired on the inner side, a person skilled in the art generally has the option of impregnating the damp wall via injection and applying a moisture-proof coating on the inner side. With the method of impregnating masonry, an attempt is usually made to install a so-called horizontal barrier, which prevents a further penetration of moisture. Often, silicone microemulsions or silicone resins are used for this purpose, with which, by means of an emulsifying agent, the silicone materials are present distributed in water in the form of small droplets. The use of diluted aqueous water glass solutions is also known, with the aid of which a so-called silicification barrier can be created. Silicification barriers generally lead to cold bridges, which is diametrically opposed to a desired thermal insulation. DE 101 30 091 A1 proposes a special cream-like water-in-oil emulsion for the waterproofing of masonry via injection. Due to the viscous consistency of the impregnation mass, a pressureless filling with almost horizontal bore holes should be possible. According to DE 10 2004 013 726 A1, acrylate gels should also be suitable for the injection into masonry. The impregnation of masonry above liquid containers arranged above bore holes is also proposed in EP 270 715 A1, FR 2 605 032 and GB 1,123,983.
DE 10 2010 021 111 A1 describes the pressing in of a pumpable composition into a porous section of the masonry to provide a waterproof seal of porous sections of a building, wherein said composition must have water-repellent or infiltrating properties. Then, a coating must be applied on a sealing slurry on the inner side of the segment of the masonry to be treated.
The methods known from the prior art are still disadvantageous in all cases. It would be desirable to be able to have recourse to improved treatment of buildings that have been subjected to moisture damage. The object of the invention was thus to be able to repair buildings showing moisture damage in such a manner that both a moisture-free building is attained and recurring moisture penetration can be permanently and reliably prevented.
Accordingly, a building waterproofing kit-of-parts, in particular a masonry waterproofing kit-of-parts, has been found, comprising and in particular consisting of
In one advantageous embodiment, the second composition B) of the building waterproofing kit-of-parts according to the invention can, alongside the additional component or components of this second composition, contain the at least one hydrocarbon solvent and/or the at least one alcohol solvent, ketone solvent and/or ester solvent; or the at least one hydrocarbon solvent and the at least one alcohol solvent, ketone solvent and/or ester solvent; or the at least one hydrocarbon solvent, the at least one alcohol solvent, the at least one ketone solvent and the at least one ester solvent; or the at least one hydrocarbon solvent, the at least one alcohol solvent and the at least one ester solvent; or the at least one hydrocarbon solvent, the at least one alcohol solvent and the at least one ester solvent, and no ketone solvent.
In a preferred embodiment, it is provided that the building waterproofing kit-of-parts, in particular the masonry waterproofing kit-of-parts, contains
In a further preferred embodiment, the kit-of-parts according to the invention is characterized by
Such embodiments of the kit-of-parts according to the invention which are particularly suitable are also those which are characterized by
In a particularly preferred embodiment, the component a4) in composition A) is present in protonated form due to the simultaneous presence of the carboxylic acid a2), preferably formic acid. Further, in a very particularly preferred embodiment, the component a3) is also present in composition A). Without being bound to a theory, it is currently assumed that, due to the presence of component a4) in protonated form, the component a3), which is usually not water-soluble, is present in solution in the aqueous first composition A). Accordingly, particularly satisfactory results are achieved with a kit-of-parts according to the invention containing a first composition A), which represents a single-phase system, i.e. an aqueous system, which in any case temporarily does not show any de-mixing.
For the production of composition A), a mixture is preferably first produced from the at least one carboxylic acid with 1 to 10 carbon atoms a2), in particular formic acid, and water. Separately, the components a1), a3) and in particular also a4) are then mixed with each other. Preferably, this mixture is added to the aqueous system containing component a2) while stirring. In one advantageous design, the pH value of this mixture lies in the range of 3.0 to 5.0 or is less than 5.0 or is adjusted to such a value. The composition A) obtained in this manner is preferably transparent.
Buildings or masonry that can be treated with the kit-of-parts according to the invention comprise, e.g., cellar and ground floor walls and building ceilings, as well as suspended ceilings.
The ketone solvent a1), optionally also b3) and/or b4), is preferably selected from the group consisting of acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, and their mixtures. In particular, component a1) is a ketone solvent. This preferably comprises acetone or is acetone.
The aminoalkylalkoxysilane a4) preferably comprises at least one aminoalkyldialkoxysilane, one aminoalkyldiethoxysilane or a mixture of these compounds, or consists of these. In one preferred variant of the building waterproofing kit-of-parts according to the invention, in particular the masonry waterproofing kit-of-parts according to the invention, the aminoalkylalkoxysilane a4) is selected from the group consisting of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropylmethyldiethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 2-aminopropyl-3-aminopropyltriemthoxysilane, 2-aminopropyl-3-aminopropyltriethoxysilane, 2-aminoethyl-2-aminoethyl-3-aminopropyltrimethoxysilane, 2-aminoethyl-2-aminoethyl-3-aminopropyltriethoxysilane, N-(n-butyl)-3-am inopropyltrimethoxysilane and their mixtures. Particularly preferably, recourse is had to 3-aminopropyltriethoxysilane, 3-aminopropylmethyldiethoxysilane and/or 3-aminopropyltrimethoxysilane and in particular to 3-aminopropyltrimethoxysilane.
Together or independently of each other, the alkylalkoxysilane a3) and the alkylalkoxysilane b1) can be a trifunctional silane compound or be formed from a mixture containing at least two trifunctional silane compounds. The alkylalkoxysilanes a3) and/or b1) are in this case in particular selected from the group consisting of methyltrimethoxysilane, phenyltrimethoxysilane, methyltriethoxysilane, phenyltriethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane and their mixtures. Alternatively or additionally, recourse can be had to at least one difunctional silane compound for the alkylalkoxysilanes a3) and/or b1). This difunctional silane compound is preferably selected from the group consisting of dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldiethoxysilane, diphenyldimethoxysilane and their mixtures. In a further particularly suitable design, the alkylalkoxysilane a3) and/or the alkylalkoxysilane b1), in particular the alkylalkoxysilane b1), can comprise or consist of at least one methyltrialkoxysilane and/or at least one dimethylalkoxysilane, in particular a methyltrialkoxysilane, e.g. methyltrimethoxysilane and/or methyltriethoxysilane.
In a particularly suitable embodiment, the at least one carboxylic acid with 1 to 10 carbon atoms a2) is selected from the group consisting of formic acid, acetic acid, propionic acid, butyric acid, 2-methly butyric acid, isovaleric acid, trimethyl acetic acid, glycolic acid, lactic acid and their mixtures. For component a2), recourse is preferably had to formic acid, acetic acid and/or propionic acid, in particular to formic acid.
The at least one ester solvent b4), optionally also a1) and/or b3), can preferably be selected from the group consisting of methyl acetate, ethyl acetate, n-butyl acetate, amyl acetate and their mixtures. Ethyl acetate as component b4) has proven to be particularly suitable for the building waterproofing kit-of-parts according to the invention, in particular the masonry waterproofing kit-of-parts.
The at least one alcohol solvent b3), optionally also a1) and/or b4), is preferably selected from the group consisting of methanol, ethanol, isopropanol, n-butanol, isobutanol, sec-butanol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether and their mixtures. Among the alcohol solvents, in particular according to component b3), ethanol and/or isopropanol have proven themselves to be particularly suitable. Particularly preferably, a mixture of ethanol and isopropanol is used as component b3).
For the at least one hydrocarbon solvent b2), recourse can be had to liquid aromatic and/or aliphatic hydrocarbons and it is preferably selected from the group consisting of toluene, xylene, cyclohexane, n-hexane, octane and their mixtures. For component b2), recourse is particularly preferably had to toluene. While in a particularly preferred embodiment isobutyltrimethoxysilane, and/or isobutyltriethoxysilane, in particular isobutyltriethoxysilane, is used for the alkylalkoxysilane a3), in a particularly preferred embodiment, triethoxymethylsilane is used for the at least one alkylalkoxysilane b1) as an alternative or in particular simultaneously.
Here, the quantity of isopropanol is preferably greater than the quantity of ethanol in relation to the volume share used.
The object of the invention is particularly well and reliably attained by means of such building waterproofing kits-of-parts according to the invention, in particular masonry waterproofing kits-of-parts, in which
In a further particularly preferred design, the composition A), alongside the components a0) to a4), contains no tenside additives, in particular no further additives.
The object of the invention is further particularly well and reliably attained by means of such building waterproofing kits-of-parts according to the invention, in particular masonry waterproofing kits-of-parts, in which as an alternative or in particular simultaneously, the second composition B) contains
The compositions A) and B) and the mixture obtained from A) and B) are preferably characterized by a watery or essentially water-like viscosity (determined at 22° C.). Component B) is preferably essentially water-free.
Among the kits-of-parts according to the invention, those are particularly suitable in which the second composition B), in each case in relation to the total weight of the aqueous composition B), contain 20.0 to 70.0 weight percent, preferably 25.0 to 60.0 weight percent, and particularly preferred 30.0 to 50.0 weight percent isopropanol, and 0.1 to 10.0 weight percent, preferably 0.2 to 5.0 weight percent, and particularly preferably 0.5 to 3.0 weight percent ethanol.
With the kits-of-parts according to the invention, the first aqueous composition A) and/or the second composition B) preferably are single-phase systems.
The volume ratio between compositions A) and B) is preferably in the range of 2:1 to 50:1, preferably in the range of 5:1 to 40:1, and particularly preferred in the range of 8:1 to 20:1.
Further, the object that forms the basis of the invention is also attained by mans of those building waterproofing kits-of-parts, in particular masonry waterproofing kits-of-parts, in which composition A) is obtainable by
Furthermore, the composition A) can, in one embodiment according to the invention, have a pH value in the range of 3.0 to 5.0 or of less than 5.0, preferably in the range of 3.5 to 4.9, and particularly preferably in the range of 3.7 to 4.8, or can be adjusted to a pH value in the range of 3.0 to 5.0 or of less than 5.0, preferably in the range of 3.5 to 4.9. or in the range of 3.7 to 4.8.
The kit-of-parts according to the invention is particularly suitable for waterproofing a building, in particular masonry, particularly preferably damp masonry, for the removal of moisture damage in buildings, in particular masonry, for the moisture sealing of buildings, in particular masonry, and/or for the formation of an, in particular essentially horizontal, moisture barrier in buildings, in particular in masonry.
The object of the invention is also attained by means of an aqueous building waterproofing agent, in particular an aqueous masonry waterproofing agent, obtained or obtainable by mixing composition A) and composition B) of the kit-of-parts according to the invention.
This building or masonry waterproofing agent preferably has a pH in the range of 3.0 to 5.0 or of less than 5.0, preferably in the range of 3.5 to 4.9, and particularly preferably in the range of 3.7 to 4.8, or is adjusted to a pH in the range of 3.0 to 5.0 or of less than 5.0, preferably in the range of 3.5 to 4.9.
The building or masonry waterproofing agent according to the invention is preferably essentially directly injected after production from components A) and B) of the kit-of-parts according to the invention via bore holes and is injected into the damp masonry with the aid of cannulas inserted into said bore holes. The building or masonry waterproofing agent according to the invention is characterized by a surprisingly long shelf life, for example over a period of up to one day, preferably of up to 12 hours. For many applications, it is recommended that the agent according to the invention be used prior to expiry of a storage period of eight hours following mixing of components A) and B). The injection techniques described are known to a person skilled in the art. The bore holes should expediently not be drilled through the entire building or masonry, but instead not penetrate a wall fully, for example. These bore holes are designed such that cannulas or so-called diffusors can be easily inserted. By connecting these cannulas or diffusors with liquid containers arranged at a relatively high position by means of hoses or pipes, the liquid building or masonry waterproofing agent according to the invention can seep into a building or masonry. The number and arrangement of the bore holes depend on the conditions of the respective building or the respective masonry. Frequently, it is often sufficient when the individual bore holes are set at a distance of approximately 10 to 20 cm in an essentially horizontal row. Due to the capillary effect, at first, an even distribution of the aqueous system occurs. Although considerably quantities of water are additionally applied to the masonry with the use of the kit-of-parts according to the invention, the formation of a moisture-free area, which also serves as a horizontal humidity barrier, is achieved. Naturally, vertical or diagonal or large-volume moisture barriers can be formed via the bore holes, depending on the nature of the application.
The object of the invention is further attained by means of an aqueous composition containing
This aqueous composition according to the invention can in particular also be used as a concentrate for the production of composition A) of the kit-of-parts according to the invention. This makes transportation and handling considerably easier.
The features of the invention disclosed in the foregoing description and in the claims can be essential for the implementation of the invention in its different embodiments, both individually as well as in any combination.
| Number | Date | Country | Kind |
|---|---|---|---|
| 18172434.5 | May 2018 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2019/060328 | 11/21/2019 | WO | 00 |
