DISPERSION PAINT

Description

[0001] The present invention relates to a dispersion paint, a method for producing the dispersion paint, the use of the dispersion paint, and the use of alkanolamine for stabilizing dispersion paints.

[0002] Various coating materials are available for coating substrates. Besides silicate paints, there are, among others, dispersion silicate paints and polymer dispersion paints.

[0003] Silicate paints are two-component paints that contain no organic components. The two main components are water glass and a water glass-resistant pigment. Silicate paints are typically mixed by combining the two main components immediately before application. Therefore, silicate paints require several steps, and their application is generally difficult and requires considerable experience.

[0004] In addition to water glass and water glass-resistant pigment, dispersion silicate paints according to DIN 18363 contain up to 5% by weight of organic components, based on the total amount of dispersion silicate paint. These organic components are primarily synthetic resin dispersions. Other substances, such as water repellents, may also be included. The use of synthetic resin dispersions makes it possible to offer dispersion silicate paints as single-component systems.

[0005] Both silicate paints and dispersion silicate paints typically have a very strongly alkaline pH value of up to 13, which requires more elaborate precautions regarding occupational safety.

[0006] Plastic dispersion paints, also known as dispersion paints, typically contain relatively large amounts of organic chemical components, especially synthetic resins such as polymers, particularly in the form of synthetic resin dispersions. To ensure sufficient storage stability, dispersion paints usually require preservatives, especially biocides such as isothiazolines. However, these can cause irritation and skin reactions, particularly in allergy sufferers.

[0007] Several methods have been proposed to provide plastic dispersion paints that do not require preservatives. These methods are based in particular on water glass and alkyl siliconates.

[0008] EP 1 297 079 B1 describes a dispersion paint containing polymer dispersion, pigment and / or filler, water glass, and water. This dispersion paint is characterized by the fact that it does not require preservatives. However, the presence of water glass means that it also contains an inorganic binder, which can impair the properties of the dispersion paint, particularly its workability.

[0009] German patent DE 1 031 910 B describes an alkyd resin emulsion paint containing titanium dioxide, fillers, an alkyd resin, and water. Sodium methyl siliconate is added to this paint immediately before application, resulting in improved washability compared to alkyd resin emulsion paints without sodium methyl siliconate. DE 1 031 910 B makes no statement regarding the pH value of the alkyd resin emulsion paint, its storage stability, or the presence of preservatives. Furthermore, storage of an alkyd resin emulsion paint containing sodium methyl siliconate according to DE 1 031 910 B is not intended.

[0010] German patent applications DE 10 2014 013 455 A1 and DE 10 2016 002 221 A1 each describe a dispersion paint containing a polymer, pigment, filler, alkyl siliconate, and water. Both documents state that the dispersion paint has an alkaline pH of no more than 12. Neither document describes how the dispersion paint can be stabilized by using an alkanolamine. A disadvantage of the dispersion paints containing alkyl siliconates described above is that yellowing can occur with some unsuitable polymers and titanium dioxide variants. Furthermore, the formation of white potassium carbonate, which can result from a reaction with carbon dioxide, can be a disadvantage in the colored range. Additionally, alkyl siliconates are relatively expensive.

[0011] Furthermore, the use of N-alkylalkanolamines and / or N,N-dialkylalkanolamines as a synergist in combination with a biocide for stabilizing latex compositions is known from EP 1 362 897 A2. However, EP 1 362 897 A2 does not describe any latex compositions containing N-alkylalkanolamines and / or N,N-dialkylalkanolamines without a biocide.

[0012] DE 10 2014 012 020 A1 further describes a dispersion containing (A) at least one compound of the formula (R 1< NCH 3 )CH 2 (CHOH) 4 CH 2 OH, wherein R 1< H, C 1 -C 4 -alkyl, CH 2 CH 2 OH or CH 2 CH(CH 3 )OH, (B) a polymeric binder and (C) water.

[0013] WO 2016 / 074186 A1 describes a dispersion of polymer particles comprising, as polymerized units, in dry weight, based on the total dry weight of the polymer particles, 85% to 99.9% ethylene unsaturated non-ionic monomers, 0.01% to 4% phosphorus-containing (meth)acrylate monomers and at least one neutralizer.

[0014] WO 2008 / 081036 A1 describes latex colour formulations containing at least one N-alkyl dialkanolamine as a neutralising agent and methods for their use.

[0015] FR 2 907 789 A1 describes the use of 2-n-butylaminoethanol as a neutralizing and / or co-dispersing agent in a paint and / or as an agent for developing the color strength of pigment(s) in a white paint base that one wishes to tint.

[0016] US 3 892 791 A describes a titanium chelate that is the reaction product of a titanium orte ester, a glycol or glycol ether and an alkanolamine.

[0017] Based on the prior art explained above, one object of the invention was to provide a dispersion paint that is essentially free of preservatives, has good storage stability and / or is easy to process.

[0018] All or some of these problems are solved according to the invention by the dispersion paint according to claim 1, the method according to claim 12, the use according to claim 14 and the use according to claim 15.

[0019] Advantageous embodiments of the invention are specified in the dependent claims and are explained in detail below.

[0020] The dispersion paint according to the invention has a pH value of 10 to 12 and contains, based on the total weight of the dispersion paint, the following components: a. 0 to 25 wt.% pigment, b. 20 to 50 wt.% filler, c. 1 to 25 wt.% polymer, d. 0.01 to 5 wt.% alkanolamine, e. 25 to 70 wt.% water, wherein the dispersion paint is essentially free of preservatives and wherein the dispersion paint contains at least one alkali plate.

[0021] Surprisingly, it has been found that by combining 0 to 25 wt.% pigment with 20 to 50 wt.% filler, 1 to 25 wt.% polymer, 0.01 to 5 wt.% alkanolamine, and 25 to 70 wt.% water in a dispersion paint with a pH value of 10 to 12, a dispersion paint is obtained in which the components exhibit excellent compatibility with each other. As a result, surfaces coated with the dispersion paint according to the invention have a more homogeneous appearance. This is particularly evident in the fact that the surfaces coated with the dispersion paint according to the invention appear very uniform with good flow. Consequently, the dispersion paint according to the invention is easy to work with and has a long open time. Furthermore, it has been shown that the dispersion paint according to the invention does not discolor even after a storage period of several weeks without preservatives.Finally, it was found that the pH value of the dispersion paint according to the invention remained essentially constant over a storage period of several weeks.

[0022] Without wishing to be bound to a specific theory, the alkanolamine appears to stabilize the dispersion paint, particularly its pH value, and to ensure good compatibility between the components. In contrast to preservative-free dispersion paints known in the prior art, the dispersion paint according to the invention does without the inorganic components water glass or siliconate, which appears to improve the compatibility between the components at the pH value of the dispersion paint according to the invention.

[0023] The alkanolamine appears to act as a pH buffer in the dispersion paint according to the invention. This seems to result in improved storage stability of the dispersion paint. This effect was not foreseeable given the use of alkanolamines as synergists for biocides, as described in EP 1 362 897 A2.

[0024] Dispersion paints within the meaning of the invention include, in particular, interior dispersion paints, exterior dispersion paints, silicone resin paints, as well as plasters and building coatings based on dispersion, including interior and exterior plasters.

[0025] The alkanolamine is present in the dispersion paint according to the invention in an amount of 0.01 to 5 wt.%, based on the total weight of the dispersion paint. Preferably, the dispersion paint according to the invention contains 0.05 to 3 wt.%, and in particular 0.1 to 1.5 wt.%, alkanolamine, in each case based on the total weight of the dispersion paint. Dispersion paints with these contents exhibit good processability and good storage stability.

[0026] Alkanolamines according to the invention are in particular compounds with the formula R 1< R 2< N(CH 2 ) l (CR 3< R 4< ) m (CH 2 ) n OH, wherein R 1< and R 2< independently mean H, a hydrocarbon residue with 1 to 10 carbon atoms or HO(CH 2 ) 2 -, R 3< and R 4< independently mean H, OH or C 1 -C 5 -alkyl, l is 0 or 1, m is an integer from 1 to 5, and n is an integer from 1 to 5.

[0027] Preferably, in the formula R 1< R 2< N(CH 2 ) l (CR 3< R 4< ) m (CH 2 ) n OH R 1< H or Methyl and R 2< H, C 1 -C 10 -Alkyl or HO(CH 2 ) 2 - and R 3< and R 4< independently of each other H, OH or Methyl, l is 0 or 1, m is an integer from 1 to 5, and n is 1.

[0028] Furthermore, in the formula, R 1< R 2< N(CH 2 ) l (CR 3< R 4< ) m (CH 2 ) n OH preferably mean R 1< H or Methyl and R 2< H, Methyl or Butyl, in particular n-Butyl and R 3< and R 4< independently H, OH or Methyl, l is 0 or 1, m is an integer from 1 to 5, and n is 1.

[0029] The alkanolamine may contain or consist of one or more alkanolamines. In particular, the alkanolamine may contain or consist of a single compound falling under the above-mentioned formula for the alkanolamine, or a mixture of two or more compounds falling under the above-mentioned formula for the alkanolamine.

[0030] According to one embodiment of the invention, the alkanolamine consists of a single compound which falls under the above-mentioned formula for the alkanolamine.

[0031] According to a further embodiment of the invention, the alkanolamine consists of a mixture of two or more compounds that fall under the above-mentioned formula for the alkanolamine.

[0032] Preferably, the alkanolamine is selected from the group consisting of 2-(n-butylamino)ethanol, 2-dimethylamino-2-methylpropanol, 2-aminoethanol, 2-amino-2-methylpropanol, N,N-dimethylglucamine, and mixtures thereof. More preferably, the alkanolamine contains 2-(n-butylamino)ethanol, 2-dimethylamino-2-methylpropanol, N,N-dimethylglucamine, or mixtures thereof.

[0033] According to a preferred embodiment, the alkanolamine is 2-(n-butylamino)ethanol. In this embodiment, 2-(n-butylamino)ethanol is present in the dispersion paint in an amount of less than 1% by weight, particularly in an amount of 0.5 to 0.99% by weight, based on the total weight of the dispersion paint. It has been found that very good storage stability can be achieved with 2-(n-butylamino)ethanol.

[0034] It has also been shown that very good storage stability can be achieved with mixtures of N,N-dimethylglucamine with another alkanolamine.

[0035] According to a further preferred embodiment, the alkanolamine is a mixture of N,N-dimethylglucamine and 2-(n-butylamino)ethanol. Preferably, according to this embodiment, 2-(n-butylamino)ethanol is present in an amount of less than 1% by weight, in particular in an amount of 0.1 to 0.99% by weight, and N,N-dimethylglucamine in an amount of up to 4% by weight in the dispersion paint, each based on the total weight of the dispersion paint.

[0036] According to a further preferred embodiment, the alkanolamine is a mixture of N,N-dimethylglucamine and 2-aminoethanol. Preferably, according to this embodiment, 2-aminoethanol is present in an amount of less than 1% by weight, in particular in an amount of 0.1 to 0.99% by weight, and N,N-dimethylglucamine in an amount of up to 4% by weight in the dispersion paint, each based on the total weight of the dispersion paint.

[0037] According to a further preferred embodiment, the alkanolamine is a mixture of N,N-dimethylglucamine and 2-amino-2-methylpropanol. Preferably, according to this embodiment, 2-amino-2-methylpropanol is present in an amount of less than 1% by weight, in particular in an amount of 0.1 to 0.99% by weight, and N,N-dimethylglucamine in an amount of up to 4% by weight in the dispersion paint, each based on the total weight of the dispersion paint.

[0038] If the alkanolamine of the dispersion paint is only a single compound, the alkanolamine is preferably free of 2-aminoethanol, diethanolamine, triethanolamine, 2-amino-1-propanol, 2-amino-2-methylpropanol or N,N-dimethylethanolamine, in particular of 2-amino-2-methylpropanol, 2-aminoethanol, diethanolamine or triethanolamine.

[0039] Dispersion paints with good storage stability can be obtained with the aforementioned alkanolamines, in particular with 2-(n-butylamino)ethanol or with mixtures of N,N-dimethylglucamine with 2-(n-butylamino)ethanol, 2-aminoethanol or 2-amino-2-methylpropanol.

[0040] Preferably, the alkanolamine contains a nitrogen atom, in particular exactly one nitrogen atom. More preferably, the alkanolamine contains an amino group, in particular exactly one amino group.

[0041] According to one embodiment of the invention, the dispersion paint according to the invention is free of alkoxylated tetraalkylalkylenediamine and / or alkoxylated (N,N')-tetraalkylalkylenediamine.

[0042] According to one embodiment of the invention, the dispersion paint according to the invention is free of water glass.

[0043] According to one embodiment of the invention, the dispersion paint according to the invention is free of wax.

[0044] Preferably, the dispersion paint according to the invention further contains pigment. However, when using certain fillers such as calcium carbonate, pigment can be omitted. Preferably, dispersion paints contain pigment to ensure good opacity and good wet scrub resistance. However, omitting pigment may be advisable, especially for economic reasons. The dispersion paint according to the invention can contain up to 25% by weight of pigment, based on the total weight of the dispersion paint. The presence of pigment increases the opacity of the dispersion paint and / or provides a color impression. Various substances are suitable as pigments.Preferably, the pigment is selected from the group consisting of titanium dioxide, iron oxide yellow, arylide (monoazo), bismuth vanadate, perinone, rutile tin-zinc, quinacridone, diketo-pyrrolo-pyrrole, iron oxide red, phthalocyanine blue, dioxazine, cobalt blue, ultramarine blue, phthalocyanine green, chromium oxide green, cobalt green, carbon black, iron oxide black, pyrazolo-quinazolone, naphthol-AS monooazo pigment, and mixtures thereof. Titanium dioxide is preferred as the pigment. According to a preferred embodiment of the invention, the dispersion paint contains 1 to 25 wt.%, preferably 1 to 20 wt.%, more preferably 1 to 15 wt.% pigment, and particularly preferably 5 to 15 wt.% pigment, in each case based on the total weight of the dispersion paint.

[0045] According to one embodiment, inorganic pigments are preferably used. Examples of inorganic pigments are oxides such as titanium dioxide, iron oxides, e.g., PY 42, PR 101, P.Bk. 11, chromium oxide green, e.g., PG 17, mixed-phase pigments, e.g., cobalt oxides blue PB 28 and green PG 50, bismuth vanadate PY 184, rutile tin-zinc PO 216, silicates, e.g., ultramarine blue PB 29, and carbon, e.g., carbon black P.Bk. 7.

[0046] According to another embodiment, organic pigments are preferably used. Examples of organic pigments are azo pigments, e.g., arylide yellow (monoazo) PY 74; polycyclic pigments, e.g., quinacridone PR 122, perinone PO 43, pyrazoloquinazolone PO 67, diketo-pyrrolo-pyrrole (DPP) PR 254, dioxazines PV 23; and metal complex pigments, e.g., copper phthalocyanines blue PB 15:3 and green PG 7.

[0047] The names of the inorganic and organic pigments used for the examples correspond to the Generic Names of the Colour Index of the British Society of Dyers and Colourists.

[0048] According to another embodiment, mixtures of inorganic and organic pigments are used.

[0049] By using the pigments listed, colored dispersion paints can be produced that essentially cover the entire color spectrum.

[0050] The dispersion paint according to the invention further contains a filler. Preferably, the dispersion paint according to the invention contains filler in an amount of 20 to 50 wt.%, in particular 20 to 35 wt.% or 20 to 30 wt.%, in each case based on the total weight of the dispersion paint. Preferably, the filler is selected from the group consisting of dolomite, barium sulfate, feldspar, quartz, calcium carbonate, mica, kaolin, calcined kaolin, talc, diatomaceous earth, and mixtures thereof. More preferably, the filler is a mixture of at least calcium carbonate and calcined kaolin. Particularly preferred is the filler a mixture of calcium carbonate, calcined kaolin, and diatomaceous earth. Such fillers result in dispersion paints with good workability.

[0051] Calcium carbonate can be used in various forms, for example in the form of chalk or calcite.

[0052] Practical tests have shown that dispersion paints that produce particularly homogeneous coatings are obtained when the filler particles are small.

[0053] Advantageously, the filler particles of the dispersion paint according to the invention have a size of less than 100 µm, in particular less than 80 µm, preferably from 0.1 to 50 µm, and more preferably from 1 to 30 µm. Methods for determining the particle size are known to those skilled in the art. For example, the particle size can be determined using a grindometer according to DIN EN ISO 1524, in particular according to DIN EN ISO 1524:2013-06. The particle size of the fillers refers in particular to the maximum agglomerate size in the dispersion paint. Furthermore, the particle size, in particular the particle size distribution, can also be determined by means of transmission electron microscopy.

[0054] The particle size is preferably determined using a grindometer according to DIN EN ISO 1524:2013-06.

[0055] According to the invention, the pH value of the dispersion paint is between 10 and 12, preferably between 10.5 and 11.5. It has been found that dispersion paints with the specified pH values ​​exhibit no or only minor changes even after storage for several weeks, even when they were essentially free of preservatives. "Essentially free of preservatives" means that the dispersion paint contains preservatives only in trace amounts, in particular in an amount of less than 2 ppm. Even more preferably, the pH value of the dispersion paint is between 10.5 and 11.4. Dispersion paints according to the invention with such pH values ​​have the additional advantage of being usable without special occupational safety precautions.

[0056] The pH value is adjusted more precisely by adding alkaline substances, also called alkali adjusters. Examples of alkaline substances are alkali metal hydroxides such as lithium, sodium, and / or potassium hydroxide; alkaline earth metal hydroxides such as magnesium, calcium, and / or barium hydroxide; ammonium hydroxide; xonotlite (6CaO·6SiO₂·H₂O); and / or ettringite (Ca₆[Al(OH)₆]₂(SO₄·26H₂O)). Preferably, the alkali adjuster is an alkali metal hydroxide, particularly potassium hydroxide.

[0057] The xonotlite preferably has a monoclinic crystal system (xonotlite monoclinic). It has been shown that xonotlite and / or ettringite can be used particularly advantageously in combination with the alkanolamine contained in the dispersion paint according to the invention. In particular, dispersion paints containing xonotlite and / or ettringite as alkali-neutralizing agents in addition to the alkanolamine exhibit increased pH stability.

[0058] According to one embodiment of the invention, the dispersion paint according to the invention contains, in addition to alkanolamine, at least one alkali in an amount of 0.005 to 3 wt.%, in particular 0.01 to 1 wt.%, based on the total composition of the dispersion paint. In particular, the dispersion paint according to the invention may contain 0.005 to 3 wt.%, in particular 0.01 to 1 wt.%, potassium hydroxide, xonotlite and / or ettringite, based on the total composition of the dispersion paint.

[0059] According to one embodiment of the invention, the pH value of the dispersion paint according to the invention remains essentially constant in the sealed container at 22°C for a period of at least 4 weeks, preferably at least 8 weeks, more preferably at least 12 weeks, even more preferably at least 16 weeks, and even more preferably at least 20 weeks. "Essentially constant" means that the measured pH value does not change within the measurement tolerance range usual for pH measurements.

[0060] According to the invention, the dispersion paint contains 1 to 25 wt.% polymer, based on the total weight of the dispersion paint. Preferably, the dispersion paint contains 1 to 20 wt.%, and more preferably 5 to 15 wt.%, polymer, in each case based on the total weight of the dispersion paint. The information regarding the polymer content in the dispersion paint refers in each case to the polymer as a solid fraction. Preferably, however, the polymer is added in the form of a dispersion, in particular an aqueous dispersion, during the production of a dispersion paint.

[0061] Advantageously, these polymer dispersions, particularly the aqueous polymer dispersions, contain 40 to 70 wt.%, preferably 45 to 60 wt.%, and more preferably 45 to 55 wt.% polymer. If the polymer is added as an aqueous polymer dispersion, the water content of the polymer dispersion is included in the total water content of the dispersion paint. Dispersion paints containing polymer in the specified amounts have demonstrated good processing properties.

[0062] Various polymers are suitable as the polymer of the dispersion paint. Preferably, the polymer of the dispersion paint according to the invention contains at least one polymer and / or copolymer based on at least one monomer selected from the group consisting of acrylic acid, acrylic acid derivatives, acrylic acid esters, methacrylic acid, methacrylic acid derivatives, methacrylic acid esters, styrene, styrene derivatives, N-vinylpyrrolidone, acrylonitrile, vinyl acetate, vinyl propionate, ethylene unsaturated carboxylic acids, ethylene unsaturated carboxylic acid esters, ethylene unsaturated carboxylic acid anhydrides, ethylene unsaturated carboxylic acid amides, and carboxylic acid vinyl esters. More preferably, the polymer of the dispersion paint contains at least one polymer based on acrylic acid derivatives and / or styrene, particularly preferably a styrene-acrylate copolymer. Preferred acrylic acid derivatives are acrylic acid esters. Preferred methacrylic acid derivatives are methacrylic acid esters.When using acrylic acid esters and / or methacrylic acid esters, it is preferred that the alcohol residue contains 1 to 12 carbon atoms. The alcohol residue may furthermore be branched or unbranched. According to a preferred embodiment, the polymer of the dispersion paint consists of at least one of the aforementioned polymers and / or copolymers.

[0063] The dispersion paint according to the invention may also contain additives. Preferably, the dispersion paint contains 0.01 to 5 wt.%, more preferably 0.05 to 3 wt.%, and more preferably 0.1 to 2 wt.%, in each case based on the total weight of the dispersion paint, additives. Suitable additives include, for example, dispersing agents, wetting agents, thickening agents, defoamers, and / or water-repellent agents.

[0064] Examples of thickening agents include alcohol alkoxylates, ethylene oxide-propylene oxide copolymers, maleic anhydride-diisobutylene copolymers, polyacrylic and polymethacrylic acid and their salts, methylcelluloses, carboxymethylcelluloses, hydroxymethylcelluloses, methylhydroxyethylcellulose, polyurethanes, alkali metal phosphates, xanthan gum and salts of modified phosphoric acids, as well as mixtures thereof.

[0065] Examples of defoamers include polyglycols, triglycerides, polysiloxane polyether copolymers, and silicone oils.

[0066] Examples of hydrophobic agents include oligomeric and polymeric siloxanes and silicone resins.

[0067] The dispersion paint according to the invention is essentially free of preservatives. "Essentially free of preservatives" means that the dispersion paint contains preservatives only in trace amounts, in particular in an amount of less than 2 ppm. Preferably, the dispersion paint according to the invention is free of biocides, in particular of isothiazolines. Examples of isothiazolines are methylisothiazolinone, chloromethylisothiazolinone, benzisothiazolinone, octylisothiazolinone, dichlorooctylisothiazolinone, and butylbenzisothiazolinone. Preferably, the dispersion paint is free of ([([(2-dihydro-5-methyl-3(2H)-oxazolyl)-1-methylethoxy]methoxy)methoxy]methanol.

[0068] The invention further provides a method for producing the dispersion paint according to the invention, comprising the steps a. Providing a composition containing, based on the total weight of the dispersion paint, i. 0 to 25 wt.% pigment, ii. 20 to 50 wt.% filler, iii. 1 to 25 wt.% polymer, iv. 0.01 to 5 wt.% alkanolamine, v. 25 to 70 wt.% water, b. Dispersing the components mentioned in a., c. Adjusting the pH value to a value of 10 to 12.

[0069] The steps listed can be carried out in any order, depending on the subject matter.

[0070] What has been said in connection with the dispersion paint according to the invention regarding the alkanolamine also applies equally to the alkanolamine of the process according to the invention.

[0071] What has been said in connection with the dispersion paint according to the invention regarding the amount of pigment and the pigment itself also applies equally to the amount of pigment and the pigment of the process according to the invention.

[0072] What has been said in connection with the dispersion paint according to the invention regarding filler also applies equally to the filler of the process according to the invention.

[0073] What has been said in connection with the pH value and the alkaline substance in relation to the dispersion paint according to the invention also applies equally to the pH value and the alkaline substance of the process according to the invention.

[0074] What has been said in connection with the dispersion paint according to the invention regarding the amount of polymer and the polymer itself also applies equally to the amount of polymer and the polymer of the process according to the invention.

[0075] What has been said in connection with the additives in the dispersion paint according to the invention also applies equally to the additives of the process according to the invention.

[0076] The dispersion paint according to the invention is suitable for various uses. In particular, it is suitable for indoor and / or outdoor use.

[0077] The invention also relates to the use of alkanolamines, in particular 2-(n-butylamino)ethanol or mixtures of N,N-dimethylglucamine with 2-(n-butylamino)ethanol, 2-aminoethanol, or 2-amino-2-methylpropanol, and at least one alkaline precipitate to increase the storage stability of preservative-free dispersion paints. Preferably, in the use according to the invention, the alkanolamine is not used to enhance the effect of a biocide. The dispersion paints are free of preservatives, in particular biocides, for example, isothiazolinones.

[0078] The invention is explained in more detail below by means of examples, which, however, serve only for illustration and are not limiting. EXAMPLES

[0079] A dispersion paint with the following formulation, shown in Table 1, was produced by mixing the components listed in Table 1, with the amounts given in wt.%. Table 1 ingredient Formulation A titanium dioxide 13 Styrene acrylate (50 wt% in water) 15 2-(n-Butylamino)ethanol 0,9 Styrene acrylate as a polymer filler 3 Diatomaceous earth 3 Calcium carbonate 19 kaolin 8 Alkaline compound 0,2 Defoamer 0,4 Thickener 0,5 Wetting agent 1 Water 36 PH value 11,3

[0080] Formulation A exhibited a storage stability of more than 6 months without discoloration and was easy to process. In particular, the formulation showed good workability and, after application, resulted in surfaces with a homogeneous overall appearance. The pH value of formulation A after 6 months was 10.7. Even after storing formulation A in an oven at 50°C, the pH value was still 10.7 after 35 days.

Claims

1. Emulsion paint containing, in each case based on the total weight of the emulsion paint, a. 0 to 25 wt.% pigment, b. 20 to 50 wt.% filler, c. 1 to 25 wt.% polymer, d. 0.01 to 5 wt.% alkanolamine, e. 25 to 70 wt.% water, wherein the pH of the emulsion paint is from 10 to 12, wherein the emulsion paint is substantially free of preservatives, and wherein the emulsion paint contains at least one alkali adjuster.

2. Emulsion paint according to claim 1, characterized in that it contains 0.05 to 3 wt.%, in particular 0.1 to 1.5 wt.%, alkanolamine, in each case based on the total weight of the emulsion paint.

3. Emulsion paint according to either claim 1 or claim 2, characterized in that the alkanolamine is a compound of the formula R1R2N(CH2)l(CR3R4)m(CH2)nOH, where R1 and R2 independently represent H, a hydrocarbon residue having 1 to 10 carbon atoms or HO(CH2)2-, R3 and R4 independently represent H, OH or C1-C5 alkyl, I is 0 or 1, m is an integer from 1 to 5, and n is an integer from 1 to 5, preferably where R1 represents H or methyl and R2 represents H, C1-C10 alkyl or HO(CH2)2- R3 and R4 independently represent H, OH or methyl, I is 0 or 1, m is an integer from 1 to 5, and n is 1, further preferably where R1 represents H or methyl and R2 represents H, methyl or butyl, in particular n-butyl, R3 and R4 independently represent H, OH or methyl, I is 0 or 1, m is an integer from 1 to 5, and n is 1.

4. Emulsion paint according to any of the preceding claims, characterized in that the emulsion paint contains 1 to 25 wt.%, in particular 1 to 20 wt.% or 1 to 15 wt.% or 5 to 15 wt.% pigment, in each case based on the total weight of the emulsion paint, in particular the pigment being selected from the group consisting of titanium dioxide, iron oxide yellow, arylide (monoazo), bismuth vanadate, perinone, rutile tin zinc, quinacridone, diketopyrrolopyrrole, iron oxide red, phthalocyanine blue, dioxazine, cobalt blue, ultramarine blue, phthalocyanine green, chromium oxide green, cobalt green, carbon black, iron oxide black, pyrazolo-quinazoline, naphthol AS monoazo pigment and mixtures thereof, in particular in that the pigment is titanium dioxide.

5. Emulsion paint according to any of the preceding claims, characterized in that the filler is selected from the group consisting of dolomite, barium sulfate, feldspar, quartz, calcium carbonate, mica, kaolin, calcined kaolin, talc, diatomaceous earth, and mixtures thereof.

6. Emulsion paint according to any of the preceding claims, characterized in that the filler is a mixture of at least calcium carbonate and calcined kaolin.

7. Emulsion paint according to any of the preceding claims, characterized in that the pH of the emulsion paint is from 10.5 to 11.5, in particular from 10.5 to 11.4.

8. Emulsion paint according to any of the preceding claims, characterized in that the pH of the emulsion paint in the closed container remains substantially constant at 22°C over a period of at least 4 weeks, in particular at least 8 weeks or at least 12 weeks or at least 16 weeks or at least 20 weeks.

9. Emulsion paint according to any of the preceding claims, characterized in that the emulsion paint contains 1 to 20 wt.%, in particular 5 to 15 wt.%, polymer, in each case based on the total weight of the emulsion paint.

10. Emulsion paint according to any of the preceding claims, characterized in that the polymer contains at least one polymer and / or copolymer based on at least one monomer selected from the group consisting of acrylic acid, acrylic acid derivatives, acrylic acid esters, methacrylic acid, methacrylic acid derivatives, methacrylic acid esters, styrene, styrene derivatives, N-vinylpyrrolidone, acrylonitrile, vinyl acetate, vinyl propionate, ethylenically unsaturated carboxylic acids, ethylenically unsaturated carboxylic acid esters, ethylenically unsaturated carboxylic acid anhydrides, ethylenically unsaturated carboxylic acid amides and carboxylic acid vinyl esters.

11. Emulsion paint according to any of the preceding claims, characterized in that the emulsion paint contains 0.01 to 5 wt.%, in particular 0.05 to 3 wt.% or 0.1 to 2 wt.%, additives, in particular dispersing, wetting, thickening, defoaming and / or hydrophobic agents, in each case based on the total weight of the emulsion paint.

12. Method for producing an emulsion paint according to any of claims 1 to 11, comprising a. providing a composition containing, in each case based on the total weight of the composition, i. 0 to 25 wt.% pigment, ii. 20 to 50 wt.% filler, iii. 1 to 25 wt.% polymer, iv. 0.01 to 5 wt.% alkanolamine, v. 25 to 70 wt.% water, b. dispersing the components mentioned in a., c. adjusting the pH to a value from 10 to 12.

13. Method according to claim 12, characterized in that the composition contains 0.05 to 3 wt.%, in particular 0.1 to 1.5 wt.%, alkanolamine, in each case based on the total weight of the composition, and / or in that the alkanolamine is defined according to claim 3 and / or in that the emulsion paint contains 1 to 25 wt.%, in particular 1 to 20 wt.% or 1 to 15 wt.% or 5 to 15 wt.% pigment, in each case based on the total weight of the emulsion paint, in particular the pigment being selected from the group consisting of titanium dioxide, iron oxide yellow, arylide (monoazo), bismuth vanadate, perinone, rutile tin zinc, quinacridone, diketopyrrolopyrrole, iron oxide red, phthalocyanine blue, dioxazine, cobalt blue, ultramarine blue, phthalocyanine green, chromium oxide green, cobalt green, carbon black, iron oxide black, pyrazolo quinazoline, naphthol AS monoazo pigment and mixtures thereof and / or in that the filler is characterized by at least one feature of claims 5 and 6 and / or in that the pH of the emulsion paint is from 10.5 to 11.5, in particular from 10.5 to 11.4 and / or in that the pH of the emulsion paint in the closed container remains constant at 22°C over a period of at least 4 weeks, in particular at least 8 weeks or at least 12 weeks or at least 16 weeks or at least 20 weeks, and / or in that the composition contains 1 to 20 wt.%, in particular 5 to 15 wt.%, polymer, in each case based on the total weight of the composition, and / or in that the polymer contains at least one polymer and / or copolymer based on at least one monomer selected from the group consisting of acrylic acid, acrylic acid derivatives, acrylic acid esters, methacrylic acid, methacrylic acid derivatives, methacrylic acid esters, styrene, styrene derivatives, N-vinylpyrrolidone, acrylonitrile, vinyl acetate, vinyl propionate, ethylenically unsaturated carbon acids, ethylenically unsaturated carbon acid esters, ethylenically unsaturated carbon acid anhydrides, ethylenically unsaturated carbon acid amides and carbon acid vinyl esters, and / or in that the composition contains 0.01 to 5 wt.%, in particular 0.05 to 3 wt.% or 0.1 to 2 wt.%, additives, in particular dispersing, wetting, thickening, defoaming and / or hydrophobic agents, in each case based on the total weight of the emulsion paint.

14. Use of an emulsion paint according to any of claims 1 to 11 for indoor and / or outdoor use.

15. Use of alkanolamine, in particular 2-(n-butylamino)ethanol or mixtures of N,N-dimethylglucamine with 2-(n-butylamino)ethanol, 2-aminoethanol or 2-amino-2-methylpropanol, and at least one alkali adjuster for increasing the storage stability of preservative-free emulsion paints.