Cement-based hybrid primer composition

Abstract

The present invention relates to a multi-component composition comprising: a first component (A) comprising water and 18-32% by weight, based on the total weight of the multi-component composition, of at least one copolymer CP wherein the copolymer is an ethylene versatate copolymer CPA and / or a copolymer CPB based on styrene and (meth) acrylate; and a second component (B) comprising at least one hydraulic binder, preferably cement. The multi-component composition is particularly suitable as a primer composition for flooring.

Description

Technical Field

[0001] The present invention relates to cementitious hybrid primer materials, especially for use in the manufacture of industrial floors. Background of the Invention

[0003] Floor coating systems are multi-layer systems which typically contain a primer layer to obtain good adhesion on the substrate, a scratch-resistant coating on top if the substrate has to be levelled, a self-levelling layer if required, and finally usually a sealer layer. As mentioned above, these floor coatings usually contain a primer layer. Such a primer layer is usually a polyurethane-based or epoxy-based composition, depending on the substrate and the chemical basis of the layer placed on top of the primer layer. Some of these primers only provide sufficient adhesion to the substrate if the next layer has a similar chemical basis. For all these chemically different compositions placed on top of the primer layer, such as polyurethane-based, epoxy-based and cementitious hybrid-based floor compositions, it is particularly challenging to provide a primer composition that provides sufficient adhesion to the substrate, especially a concrete substrate.

[0004] WO2020178457 A1 describes such a cementitious hybrid-based floor composition which comprises a first component (A) containing water and a second component (B) containing at least one hydraulic binder, wherein the multi-component composition contains a vinyl versatate copolymer and / or a copolymer based on styrene and (meth)acrylate. The amount of the hydraulic binder is 25 - 65 wt% based on the total weight of the multi-component composition.

[0005] Therefore, there is a need for primer compositions that provide good adhesion, especially high pull-off strength values, for polyurethane-based, epoxy-based and cementitious hybrid-based floor compositions and that have good application properties if applied to a substrate, preferably a concrete substrate. Summary of the Invention

[0007] Accordingly, it is an object of the present invention to overcome the problems of the above-mentioned prior art, especially to provide a primer composition that provides good adhesion, especially high pull-off strength values, for polyurethane-based, epoxy-based and cementitious hybrid-based floor compositions and that has good application properties if applied to a substrate, preferably a concrete substrate.

[0008] Surprisingly, this object can be achieved by providing a multi-component composition comprising:

[0009] a first component (A) which comprises water and

[0010] Based on the total weight of the multi-component composition, 18 - 32 wt% of at least one copolymer CP, wherein the copolymer is a vinyl versatate copolymer CPA and / or a copolymer CPB based on styrene and (meth)acrylate, preferably the copolymer CP is a copolymer CPB based on styrene and (meth)acrylate; and

[0011] A second component (B) which comprises at least one hydraulic binder, preferably cement.

[0012] The present invention also relates to a method for manufacturing a primer coating for a floor or a coating using the multi-component composition.

[0013] The present invention also relates to the use of the multi-component composition as a primer composition for coatings and floors, preferably for corresponding uses for floors. DETAILED DESCRIPTION OF THE INVENTION

[0015] The term "cement-based" refers to compositions comprising a hydraulic binder such as cement and their cured products.

[0016] The term "primer layer" or "primer coating" refers to the first layer of a multi-layer system applied to a substrate. The primer is used to provide adhesion for the entire layer structure, which means it is also used for subsequent layers in addition to the primer and to seal possible pores in the substrate.

[0017] First, the multi-component composition used according to the present invention is explained. The multi-component composition comprises two or more separate components. These components are stored separately to avoid spontaneous reactions. Preferably, the multi-component composition consists of a first component (A) and a second component (B), and the first component (A) and the second component (B) are stored separately. The separate components can be assembled into a package. For use, these components are mixed with each other. Optionally, one or more additional components can be included for specific purposes. For example, an additional component containing a colorant (such as a pigment) can be used for coloring purposes.

[0018] First component (A)

[0019] The first component contains water. Optionally, one or more additives can be added to the first component. The first component is preferably a liquid component. The first component can be viscous, but is generally pourable.

[0020] Based on the total weight of the multi-component composition, the first component (A) contains 18-32% by weight of at least one copolymer CP, where the copolymer is a vinyl versatate copolymer CPA and / or a copolymer CPB based on styrene and (meth)acrylate. An amount of less than 18% by weight of at least one copolymer CP will result in insufficient draw strength values. This can be seen, for example, in the comparison between Examples 1-3 and Examples 4-5. An amount of greater than 32% by weight of at least one copolymer CP will result in insufficient application performance of the resulting composition.

[0021] Preferably, based on the total weight of the multi-component composition, the amount of copolymer CP is 20-30% by weight, preferably 21-26% by weight, more preferably 22-24% by weight. Such a range of at least one copolymer CP is advantageous in terms of good applicability and higher draw strength values. This can be seen, for example, in the comparison between Examples 1-3 and Examples 4-5.

[0022] If the copolymer CP is a vinyl versatate copolymer CPA, it is preferably a vinyl versatate copolymer dispersion, more preferably a dispersion in which the vinyl versatate copolymer is dispersed in a dispersion medium (preferably water).

[0023] The vinyl versatate copolymer CPA is a copolymer containing vinyl versatate as a monomer unit, and the vinyl versatate is an ester of a tertiary carboxylic acid and vinyl alcohol, that is, a copolymer containing monomer units including vinyl versatate.

[0024] Preferred monomer units that are not vinyl versatate are selected from ethylene, vinyl acetate, and (meth)acrylate.

[0025] The vinyl versatate copolymer can be, for example, a random copolymer, a block copolymer, or a graft polymer.

[0026] Preferably, the vinyl versatate copolymer is selected from ethylene-vinyl acetate-vinyl versatate copolymer, vinyl acetate-vinyl versatate copolymer, vinyl acetate-vinyl versatate-(meth)acrylate copolymer, and vinyl acetate-vinyl versatate-(meth)acrylate-ethylene copolymer, and most preferably vinyl acetate-vinyl versatate copolymer.

[0027] Preferably, the number average particle size of the vinyl versatate copolymer is 300 to 20 μm, preferably 150 to 50 μm.

[0028] Preferably, at least one copolymer CP is a copolymer CPB based on styrene and (meth)acrylate. The copolymer CPB based on styrene and (meth)acrylate is preferably based on styrene and (meth)acrylate, such as C1-C7 alkyl acrylate, such as methyl acrylate or ethyl acrylate or butyl acrylate, or C1-C7 alkyl methacrylate, such as methyl methacrylate or ethyl methacrylate or butyl methacrylate, or acrylamide or methacrylamide, such as N-methoxyacrylamide or N-methoxymethylacrylamide, and other unsaturated monomers.

[0029] Particularly preferred are copolymers of two or more, preferably 3 or 4 monomers selected from styrene, (meth)acrylic acid, C1-C7 alkyl (meth)acrylates, especially methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate and (meth)acrylamide. More preferably, the copolymer is based on monomers selected from styrene, C1-C7 alkyl (meth)acrylates, especially methyl (meth)acrylate, ethyl (meth)acrylate and butyl (meth)acrylate. Most preferably, the copolymer is based on the monomers styrene, butyl acrylate and butyl methacrylate.

[0030] Preferably, the copolymer CPB based on styrene and (meth)acrylate is a dispersion, more preferably an aqueous dispersion.

[0031] Most preferably, the copolymer CP is a copolymer CPB based on styrene and (meth)acrylate, especially the copolymer CPB preferably disclosed above. Most preferably, the copolymer CPB is based on monomers selected from styrene, C1-C7 alkyl (meth)acrylates, especially methyl (meth)acrylate, ethyl (meth)acrylate and butyl (meth)acrylate, and in particular, the copolymer is based on the monomers styrene, butyl acrylate and butyl methacrylate.

[0032] Most preferably, based on the total weight of the multi-component composition, the amount of the copolymer CPB is 20-30% by weight, preferably 21-26% by weight, more preferably 22-24% by weight.

[0033] The first component (A) contains water. Preferably, the amount of water contained in the first component (A) is 17.5-35% by weight, preferably 20-32.5% by weight, more preferably 23-30% by weight, based on the total weight of the multi-component composition. This range is advantageous for good applicability and higher pull-out strength values. This can be seen, for example, in the comparison between Examples 1-3 and Examples 4-5 or in the comparison between Example 1 and Example 6.

[0034] In addition to water and at least one copolymer CP, the first component may also contain other additives. Preferably, the other optional additives are selected from plasticizers, pigments, adhesion promoters, especially epoxy silanes, (meth)acrylic silanes and alkyl silanes, stabilizers against heat, light and UV radiation, thixotropic agents, flow-improving additives, defoamers, wetting agents, flow control agents, degassing agents, biocides and emulsifiers. More preferably, the optional additives are selected from thixotropic agents, defoamers and wetting agents.

[0035] Preferably, the other optional additives are present in an amount of 0.5 - 10% by weight, preferably 1 - 8% by weight, more preferably 1 - 7.5% by weight, based on the total weight of the multi-component composition.

[0036] Second component (B)

[0037] The second component (B) comprises at least one hydraulic binder, preferably cement.

[0038] The hydraulic binder is substantially an inorganic or mineral material or blend which hardens upon mixing with water. Hydraulic binders also include latent hydraulic binders or pozzolanic binders which typically require activation, e.g., by the presence of lime, to exhibit hydraulicity.

[0039] Typical examples of hydraulic binders are cement, such as Portland cement, fly ash, granulated blast furnace slag, lime such as limestone and quicklime, rice husk, calcined paper sludge, fumed silica and pozzolans, or a mixture of at least one of them.

[0040] The hydraulic binder preferably comprises cement, especially Portland cement. More preferably, the hydraulic binder is cement. Hydraulic binders such as cement usually also include calcium sulfate, such as gypsum, anhydrite and hemihydrate.

[0041] Based on the total weight of the multi-component composition, the amount of the hydraulic binder is preferably 10 - 25% by weight, preferably 12.5 - 22.5% by weight, more preferably 15 - 20% by weight. If the amount is less than 10% by weight, the cured composition will have a reduced ability to close pores in the substrate and a reduced pull-out value. An amount greater than 30% by weight results in a short open time, which will make the application of the mixed composition more challenging.

[0042] Furthermore, the multi-component composition is preferably formulated such that the weight ratio of water to the hydraulic binder is in the range of 1.0 to 1.8, preferably in the range of 1.2 to 1.6, more preferably in the range of 1.3 to 1.5. Such a ratio is advantageous for good workability and higher pull-out strength values. This can be seen, for example, in the comparison between Examples 1 to 3 and Examples 4 to 5 or in the comparison between Example 1 and Example 6.

[0043] The second component (B) preferably contains at least one or more aggregates. Aggregates are chemically inert solid particulate materials. Aggregates have various shapes, sizes and materials, ranging from fine particles of sand to large coarse rocks. Examples of suitable aggregates are sand, such as silica sand, gravel and crushed stone, slag, lightweight aggregates such as clay, pumice, perlite and vermiculite. Sand, especially silica sand, is preferred.

[0044] The particle size of the aggregates can vary according to the application, but is preferably rather small, for example not more than 6 mm, preferably not more than 4 mm. The aggregates can have a particle size of, for example, 0.05 - 4 mm, preferably 0.1 - 3 mm, where sand with a particle size of 0.1 - 3 mm, especially silica sand, is particularly preferred. Sands with a particle size range of 0.3 - 0.8 mm or 0.1 - 0.5 mm can be advantageously used in the present invention. The particle size range can be determined, for example, by sieve analysis.

[0045] Preferably, based on the total weight of the multi-component composition, the amount of the aggregates is 10 - 30% by weight, preferably 15 - 25% by weight, more preferably 17.5 - 23.5% by weight.

[0046] The second component (B) preferably contains calcium carbonate.

[0047] The calcium carbonate particles preferably have an average diameter D of 1 to 200 μm, more preferably 2 to 100 μm, 2 to 50 μm, 3 to 20 μm, 3 to 10 μm, and even more preferably 3 to 7.5 μm 50 。

[0048] The D50 value of the cumulative frequency distribution of the calcium carbonate particles obtained by the laser diffraction method indicates that 50% of the particles have a diameter equal to or less than the specified value. The particle size distribution curve can be determined by the laser diffraction method.

[0049] Preferably, based on the total weight of the multi-component composition, the amount of calcium carbonate is 2.5 - 10% by weight, 3.5 - 9% by weight, 4 - 8% by weight, 5 - 8% by weight, and more preferably 6 - 8% by weight.

[0050] The second component (B) preferably contains one or more additives selected from superplasticizers, preferably polycarboxylate ether (PCE), oils, preferably mineral oil, paraffin oil and organic oil, cellulose fibers, and inorganic or organic pigments, preferably selected from superplasticizers and inorganic or organic pigments.

[0051] The multi-component composition preferably consists of a first component (A) and a second component (B), wherein:

[0052] The first component (A) contains:

[0053] - Based on the total weight of the multi-component composition, 20 - 30% by weight, preferably 21 - 26% by weight, more preferably 22 - 24% by weight of at least one copolymer CP, preferably a copolymer CPB based on styrene and (meth)acrylate;

[0054] - Based on the total weight of the multi-component composition, 17.5 - 35% by weight, preferably 20 - 32.5% by weight, more preferably 23 - 30% by weight of water;

[0055] - Based on the total weight of the multi-component composition, preferably 0.5 - 10% by weight, preferably 1 - 8% by weight, more preferably 1 - 7.5% by weight of additives selected from plasticizers, pigments, adhesion promoters, stabilizers against heat, light and UV radiation, thixotropic agents, flow improvement additives, defoamers, wetting agents, flow control agents, degassing agents, biocides and emulsifiers, preferably selected from thixotropic agents, defoamers and wetting agents.

[0056] The second component (B) contains:

[0057] - Based on the total weight of the multi-component composition, 10 - 25% by weight, preferably 12.5 - 22.5% by weight, more preferably 15 - 20% by weight of at least one hydraulic binder, preferably cement;

[0058] - Based on the total weight of the multi-component composition, 10 - 30% by weight, preferably 15 - 25% by weight, more preferably 17.5 - 23.5% by weight of at least one or more aggregates, preferably sand;

[0059] - Based on the total weight of the multi-component composition, preferably 1 - 8% by weight, preferably 2.5 - 6.5% by weight, more preferably 3.5 - 5.5% by weight of calcium carbonate.

[0060] Preferably, the weight ratio of water to the hydraulic binder is in the range of 1.0 to 1.8, preferably in the range of 1.2 to 1.6, more preferably in the range of 1.3 to 1.5.

[0061] Mixture

[0062] For using the multi-component composition, preferably as a primer composition for coatings and floors, preferably floors, the components of the composition are mixed before use.

[0063] When the components are mixed together, the hydration and curing reactions start, such that the composition can be processed within the pot life after the components are mixed. The term "pot life" should be understood to mean the duration of processability when the components are mixed with each other. The end of the pot life is usually associated with an increase in the viscosity of the composition, such that processing of the composition is no longer possible.

[0064] When the components are mixed, one or more hydraulic binders react with water. This reaction is commonly referred to as the hydration reaction. When reacting with water, the hydraulic binder cures into a solid material.

[0065] Method for manufacturing a primer coating for flooring or coating, preferably for flooring

[0066] The present invention also relates to a method for manufacturing a primer coating for a floor or a coating, preferably for a floor, using the aforementioned multi-component composition, wherein the method comprises the following steps: a) mixing a first component (A) and a second component (B), b) applying the mixed material to a substrate, preferably in an amount of 100 - 300 g / m 2 and more preferably 150 - 250 g / m 2 , c) optionally smoothing the applied mixed material, and d) curing the applied mixed material to obtain a primer coating.

[0067] Preferably, a primer coating with a thickness of 0.05 - 0.2 mm, preferably 0.1 - 0.15 mm, is obtained after step d).

[0068] The substrate to which the primer coating is applied is preferably selected from:

[0069] – concrete, mortar, cement screed, fiber cement, bricks, tiles, plaster, gypsum, natural stone, ceramics, glass and

[0070] – repair or leveling materials based on PCC (polymer-modified cement composition) or ECC (epoxy-modified cement composition);

[0071] Most preferably concrete.

[0072] Preferably, the mixed material is applied in a liquid state within its pot life, usually by pouring it onto the substrate and then spreading it with a tool such as a squeegee, notched trowel or roller to obtain the desired dry film thickness.

[0073] The application temperature of the mixed material is preferably 0 to 40 °C, 8 to 40 °C, preferably 12 to 35 °C.

[0074] As described above, if the substrate is very uneven and has to be levelled, the scratch-resistant coating is usually applied on top of the primer layer / coating. The primer and the scratch-resistant layer / coating usually consist of separate commercial products and require a large number of different commercial products at the application site and in the storage facilities. It has surprisingly been found that the first component (A) and the second component (B) of the present solution can be applied as a thin layer of the primer layer in a certain weight ratio and the same components used in a different weight ratio together with added additional water can be applied as a thicker scratch-resistant coating on top of the primer layer without disadvantages in terms of the final draw properties of the cured layer. This surprisingly provides a "one-product fits both" solution for the multi-component system, which can serve as a basis for both the primer layer and the scratch-resistant layer at the application site. When applied as the primer layer, the components (A) and (B) can be used "as such" in a certain weight ratio of component (A) to component (B). If used for the scratch-resistant coating, they can be mixed in another weight ratio of component (A) to component (B) and diluted with additional tap water. Such a system would render the need for a variety of commercial products at the application site and in the storage / supply site redundant, since only one type of component (A) and component (B) need to be present at the application site and in the storage / supply site. Examples 4 and 5 in Table 2 in the experimental part are possible examples of such compositions that can be used as the scratch-resistant layer. They are based on the same components (A) and (B) as in primer composition Examples 1 - 3 and Example 6, but have another weight ratio, as shown in the ratio "weight ratio (A:B)" in Table 2, and contain additional water.

[0075] Therefore, preferably in the method mentioned above, after step d):

[0076] - Mix the first component (A) and the second component (B) (as previously described as the first component (A) and the second component (B) respectively) as follows: weight ratio of the first component (A): the second component (B) (weight ratio A:B) = 1:3 - 1:5, preferably 1:3.5 - 1:4.5, more preferably 1:3.75 - 1:4.25.

[0077] - Mix the first component (A) and the second component (B) with the addition of additional water, where the total amount of added water is 4 - 15 wt%, preferably 6 - 12.5 wt%, more preferably 7 - 10 wt%, based on the mixture of the obtained first component (A) and second component (B) and the added water.

[0078] - Apply the obtained mixture on top of the primer coating obtained in step d), preferably in an amount of 300 - 1000 g / m 2 and more preferably in an amount of 500 - 800 g / m 2Apply in an amount to obtain a scratch-resistant coating.

[0079] The first component (A) used and the second component (B) used have the same chemical components and amounts of said chemical components as the first component (A) and the second component (B) used in step a) of the aforementioned method. This makes it redundant to require multiple commercial products at the application site and the storage / supply site, because both the primer and the scratch-resistant coating can be obtained using the same first component (A) and the second component (B) used. The applicator only has to change the mixing ratio and add additional water to obtain the scratch-resistant coating.

[0080] Preferably, after said application, a scratch-resistant coating with a thickness of 0.2 - 0.6 mm, preferably 0.3 - 0.5 mm is obtained.

[0081] Preferably, the first component (A) and the second component (B) are used as described for the first component (A) and the second component (B) preferably above.

[0082] The present invention also relates to a method for floor covering, wherein a composition selected from a polyurethane-based composition, an epoxy-based composition, and a cement-based admixture composition is applied to the primer coating or the scratch-resistant coating obtained in the aforementioned method for manufacturing the primer coating, preferably in an amount of 1000 - 10000 g / m 2 and more preferably 2000 - 7000 g / m 2 Apply in an amount.

[0083] The cement-based admixture composition is preferably a polyurethane cement-based hybrid composition, an epoxy cement-based hybrid composition, and an acrylic cement-based hybrid composition.

[0084] If a cement-based admixture composition is used, it is particularly preferred to use the same first component (A) and second component (B) as for the primer layer and the scratch-resistant coating. In addition, as preferably described for the above-mentioned scratch-resistant coating, use the same preferred weight ratio (A:B) and the same preferred amount of additional water, and optionally add additional pigments. Most preferably, the composition based on the cement-based admixture composition is more than 80% the same, more preferably more than 90% the same, and most preferably more than 95% the same as the total weight of the scratch-resistant layer. This system / method will further reduce the amount of different commercial products at the application site and the storage / supply site.

[0085] Preferably, a cured layer with a thickness of 1 - 15 mm of the composition is obtained after coating the composition. In the case of the polyurethane-based composition and the epoxy-based composition, it is preferred to obtain a layer with a cured composition thickness of 1.5 - 3 mm. In the case of the cement-based admixture composition, it is preferred to obtain a layer with a cured composition thickness of 4 - 8 mm.

[0086] As shown in Example 1, the primer compositions applied provide good adhesion for polyurethane-based compositions (pull-off 7d PU), epoxy-based compositions (pull-off 7d EP), and cement-based admixture-based compositions (pull-off 7d CEM-EP and CEM-PU). The latter contain the layer of Example 4 on top of the layer of Example 1 covered with a polyurethane-based or epoxy-based composition. It is thus shown that the primer coating can provide sufficient adhesion to the cement-based admixture-based composition (Example 4).

[0087] The invention also relates to the use of the multi-component composition as described above as a primer composition for coatings and floors, preferably floors.

[0088] Preferably, the primer composition is applied to substrates selected from the list consisting of:

[0089] – concrete, mortar, cement screed, fiber cement, bricks, tiles, plaster, gypsum, natural stone, ceramics, glass and

[0090] – repair or leveling materials based on PCC (polymer-modified cement composition) or ECC (epoxy-modified cement composition),

[0091] Most preferably concrete.

[0092] Preferably, the primer composition is applied to the substrate in an amount of 100 - 300 g / m 2 、more preferably 150 - 250 g / m 2 . Further preferably, a primer coating with a thickness of 0.05 - 0.2 mm, preferably 0.1 - 0.15 mm is obtained.

[0093] Preferably, the cured primer composition provides the following properties:

[0094] After storage for 28 days at (23 ± 2) °C and (50 ± 5) % relative humidity, the pull-off strength measured as described in the experimental part: > 1.5, preferably > 1.7 N / mm 2 .

[0095] The application condition determined as described in the experimental part: unstructured surface without open pores.

[0096] The above properties are preferably measured as described in the experimental part.

[0097] The invention is further explained in the experimental part below. However, these experimental parts should not be construed as limiting the scope of the invention. Unless otherwise stated, the ratios and percentages shown are by weight. Examples

[0098] The following commercial products were used in the examples:

[0099]

[0100] Table 1

[0101] Examples

[0102] Prepare the first component (A) and the second component (B) containing the above products with the products and parts by weight given in Table 2 below. Regarding CPB, the dry / solid weight of Revacryl AE 3737 is shown in Table 2, and the water contained in these commercial products is added to the "water". Thus, if 10% by weight of Revacryl AE 3737 is used in component A, then 5% by weight of "CPB" and 5% by weight of "water" will be shown in Table 2.

[0103] Measurement method

[0104] The properties of the multicomponent composition are tested according to the methods mentioned below. The results are shown in Table 2. The weight ratio of water to the hydraulic binder is expressed as "w / c". The weight ratio of component A to component B is expressed as "weight ratio (A:B)".

[0105] Pull-off strength / Adhesion strength (pull-off):

[0106] Apply the composition Examples 1 - 6 on a concrete slab. In the case of Examples 1 - 3 and Example 6 (primer coat), apply 350 g / m 2 . In the case of Examples 4 and 5 (scratch-resistant coat), apply 1000 g / m 2 . On top of the cured coat, apply the following layer on top of the cured coat:

[0107]

[0108] The bond strength is determined using a tensile load device according to EN 24624. At least 4 tests are carried out in accordance with DIN EN 1542 (07 / 1999) and EN 13892 - 8:2002.

[0109] Before the test, store all specimens at (23 ± 2) °C and (50 ± 5)% relative humidity for a specified time (7 days and 28 days respectively). The tensile load is increased at a constant rate of (0.05 ± 0.01) N / (mm 2 s). The bond strength is calculated as the average of 4 single values.

[0110] Application:

[0111] Determine the application behavior according to the following method:

[0112] Before mixing, each component must be at a temperature of 20 °C ± 2 °C individually. The components are mixed and then the resulting test material is poured onto the test surface and levelled using a roller. The resulting layer after curing is visually evaluated using the following classification:

[0113] Good = The surface is level, no remaining traces of the roller can be detected visually, and no open pores can be detected.

[0114] Medium = To level the surface, additional moderate assistance from the roller is required. Marks of the roller can be detected visually and very few open pores can be detected.

[0115] Insufficient = It is very difficult to level the surface using the roller, mortar-like behavior, and many open pores can be detected.

[0116]

Claims

1. A multi-component composition, comprising: A first component (A), which contains water and Based on the total weight of the multi-component composition, 18 - 32 wt% of at least one copolymer CP, wherein the copolymer is a vinyl versatate copolymer CPA, and / or a copolymer CPB based on styrene and (meth)acrylate, preferably the copolymer CP is a copolymer CPB based on styrene and (meth)acrylate; and A second component (B), which contains at least one hydraulic binder, preferably cement.

2. The multi-component composition according to claim 1, wherein based on the total weight of the multi-component composition, the amount of the copolymer CP is 20 - 30 wt%, preferably 21 - 26 wt%, more preferably 22 - 24 wt%.

3. The multi-component composition according to any one of the preceding claims, wherein the vinyl versatate copolymer CPA is selected from ethylene-vinyl acetate-vinyl versatate copolymer, vinyl acetate-vinyl versatate copolymer, vinyl acetate-vinyl versatate-(meth)acrylate copolymer, and vinyl acetate-vinyl versatate-(meth)acrylate-ethylene copolymer, preferably wherein the vinyl versatate copolymer CPA is vinyl acetate-vinyl versatate copolymer.

4. The multi-component composition according to any one of the preceding claims, wherein the copolymer CPB based on styrene and (meth)acrylate is based on two or more, preferably 3 or 4 monomers selected from styrene, (meth)acrylic acid, C1-C7 alkyl (meth)acrylates, especially methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, and (meth)acrylamide, more preferably the copolymer is based on monomers selected from styrene, C1-C7 alkyl (meth)acrylates, especially methyl (meth)acrylate, ethyl (meth)acrylate, and butyl (meth)acrylate.

5. The multicomponent composition according to claim 1, wherein the copolymer CP is a copolymer CPB based on styrene and (meth)acrylate, preferably the copolymer CPB according to claim 4, and more preferably the copolymer CPB is based on monomers selected from the group consisting of: Styrene, C1-C7 alkyl (meth)acrylates, especially methyl (meth)acrylate, ethyl (meth)acrylate, and butyl (meth)acrylate; preferably, based on the total weight of the multi-component composition, the amount of the copolymer CPB is 20 - 30 wt%, preferably 21 - 26 wt%, more preferably 22 - 24 wt%.

6. The multi-component composition according to any one of the preceding claims, wherein based on the total weight of the multi-component composition, the first component (A) contains 17.5 - 35 wt%, preferably 20 - 32.5 wt%, more preferably 23 - 30 wt% of water.

7. The multi-component composition according to any one of the preceding claims, wherein the second component (B) contains at least one hydraulic binder, preferably cement, in an amount of 10 - 25 wt%, preferably 12.5 - 22.5 wt%, more preferably 15 - 20 wt% based on the total weight of the multi-component composition.

8. The multi-component composition according to any one of the preceding claims, wherein the second component (B) contains at least one or more aggregates, preferably sand, and preferably the content of the one or more aggregates is 10-30 wt%, preferably 15-25 wt%, more preferably 17.5-23.5 wt%, based on the total weight of the multi-component composition.

9. The multi-component composition according to any one of the preceding claims, wherein the second component (B) contains calcium carbonate, and the amount of the calcium carbonate is preferably 1-8% by weight, preferably 2.5-6.5% by weight, more preferably 3.5-5.5% by weight, based on the total weight of the multi-component composition.

10. The multi-component composition according to any one of the preceding claims, wherein the weight ratio of water to hydraulic binder is in the range of 1.0 to 1.8, preferably in the range of 1.2 to 1.6, more preferably in the range of 1.3 to 1.

5.

11. The multi-component composition according to any one of the preceding claims, wherein the multi-component composition consists of a first component (A) and a second component (B), and the first component (A) and the second component (B) are stored separately.

12. A method for manufacturing a primer coating for a floor or a coating, preferably a primer coating for a floor, using the multi-component composition according to any one of claims 1 to 11, wherein the method comprises the following steps: a) Mixing the first component (A) and the second component (B), b) Apply the mixed materials to the substrate, preferably in an amount of 100 - 300 g / m 2 and more preferably 150 - 250 g / m 2 of the amount applied, c) Optionally smoothing the applied mixed material, and d) Curing the applied mixed material to obtain a primer coating.

13. The method according to claim 12, wherein, After step d): - Mixing the first component (A) and the second component (B) according to any one of claims 1-11 as the first component (A) and the second component (B) respectively in a ratio of the weight ratio of the first component (A): the second component (B) (weight ratio A: B) of 1:3 - 1:5, preferably 1:3.5 - 1:4.5, more preferably 1:3.75 - 1:4.25, and adding additional water, wherein the total amount of the added water is 4-15% by weight, preferably 6-12.5% by weight, more preferably 7-10% by weight, based on the mixture obtained from the first component (A), the second component (B), and the added water; And - Apply the obtained mixture on top of the primer coating obtained in step d), preferably in an amount of 300 - 1000 g / m 2 , more preferably 500 - 800 g / m 2 to obtain a scratch-resistant coating, wherein the first component (A) used and the second component (B) used have the same chemical components and amounts of the chemical components as the first component (A) and the second component (B) used in step a) of claim 12.

14. A method for manufacturing a floor covering, wherein a composition selected from a polyurethane-based composition, an epoxy-based composition, and a cement-based admixture-based composition is applied onto a primer coating obtained by the method according to claim 12 or onto a scratch-resistant coating obtained by the method according to claim 13, preferably in an amount of 1000 - 10000 g / m 2 , more preferably 2000 - 7000 g / m 2 .

15. Use of the multi-component composition according to any one of claims 1-11 as a primer composition for coatings and floors, preferably floors.

Images