阅读说明：本技术 尤其用于制备经涂覆墙壁、地板和天花板饰面材料、尤其用于制备经涂覆墙纸的涂料组合物 (Coating composition, in particular for producing coated wall, floor and ceiling finishing materials, in particular for producing coated wallpaper ) 是由 H-J·波瑟 B·格尔瑟 H·克里普克 E·克罗格尔 C·彼得 A·雷斯梅尔 于 2018-10-09 设计创作，主要内容包括：本发明涉及一种用于制备经涂覆的基底并且尤其用于制备经涂覆的墙壁、地板和天花板饰面材料的涂料组合物。(The present invention relates to a coating composition for the preparation of coated substrates and in particular for the preparation of coated wall, floor and ceiling finishing materials.)

1. A coating composition for preparing coated substrates and in particular for preparing coated wall, floor and ceiling finishing materials, the coating composition comprising:

a)15 to 80% by weight of at least one ethylene-vinyl acetate copolymer,

b)0.1 to 30 wt% of at least one hydrocarbon resin,

c)0.1 to 20% by weight of at least one wax,

d)0.1 to 80 wt% of at least one filler,

e)0.01 to 20 wt.% of at least one lubricant selected from the group consisting of: carboxylic acid amides, fatty alcohols, metal soaps, complex esters, and any mixtures of two or more of the foregoing, and

f)0.0 to 10 wt% of an optional blowing agent,

wherein the sum of all ingredients is 100 wt%.

2. Coating composition for the preparation of coated substrates and in particular for the preparation of coated wall, floor and ceiling finishing materials, obtainable by combining:

a)15 to 80% by weight of at least one ethylene-vinyl acetate copolymer,

b)0.1 to 30 wt% of at least one hydrocarbon resin,

c)0.1 to 20% by weight of at least one wax,

d)0.1 to 80 wt% of at least one filler,

e)0.01 to 20 wt.% of at least one lubricant selected from the group consisting of: carboxylic acid amides, fatty alcohols, metal soaps, complex esters, and any mixtures of two or more of the foregoing, and

f)0.0 to 10 wt% of an optional blowing agent,

wherein the sum of all ingredients is 100 wt%.

3. The coating composition according to claim 1, characterized in that the at least one lubricant is a carboxylic acid amide according to general formula (I) and/or a salt thereof,

wherein

R₁Is a substituted or unsubstituted, linear or branched alkyl group, a substituted or unsubstituted, linear or branched alkenyl group, a substituted or unsubstituted, linear or branched alkynyl group, a substituted or unsubstituted cycloaliphatic group, a substituted or unsubstituted aromatic group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted carboxyl group, or a substituted or unsubstituted alkylamido group, and R₂And R₃Are identical to or different from one another and denote hydrogen, substituted or unsubstituted, linear or branched alkyl, substituted or unsubstituted, linear or branched alkenyl, substituted or unsubstituted, linear or branched alkynyl, substituted or unsubstituted cycloaliphatic, substituted or unsubstituted aromatic, substituted or unsubstituted heterocyclic, substituted or unsubstituted alkoxy, substituted or unsubstituted alkoxycarbonyl, substituted or unsubstituted carboxyl or substituted or unsubstituted alkylamido.

4. Coating composition according to one of the preceding claims, characterized in that the at least one lubricant is a carboxylic acid amide according to the general formula (I) and/or a salt thereof, wherein R₁Is C_10-24Alkyl and preferably C_15-20Alkyl, and R₂And R₃Are identical to or different from one another and represent hydrogen or a substituted or unsubstituted alkylamido radical.

5. The coating composition according to one or more of the preceding claims, characterized in that said carboxylic acid amide is a secondary bisamide.

6. The coating composition according to one or more of the preceding claims, characterized in that said at least one ethylene-vinyl acetate copolymer is a copolymer comprising no other comonomer than the comonomers ethylene and vinyl acetate.

7. The coating composition according to one or more of the preceding claims, characterized in that the proportion of the vinyl acetate in the at least one ethylene-vinyl acetate copolymer is in the range from 15 to 80% by weight, preferably in the range from more than 18 to 60% by weight, particularly preferably in the range from 20 to 50% by weight and very particularly preferably in the range from 25 to 40% by weight.

8. The coating composition according to one or more of the preceding claims, characterized in that as hydrocarbon resin at least one resin selected from the group consisting of: aliphatic resins, cycloaliphatic resins, indene-benzofuran resins, polystyrene resins, polymethylstyrene resins and any mixtures of two or more of the above-mentioned compounds, preferably cycloaliphatic resins, indene-benzofuran resins and/or polymethylstyrene resins, particularly preferably dicyclopentadiene resins, indene-benzofuran resins and/or poly-alpha-methylstyrene resins, and very particularly preferably indene-benzofuran resins or dicyclopentadiene resins having a weight-average molecular weight of from 200 to 1,000g/mol and/or poly-alpha-methylstyrene resins having a weight-average molecular weight of from 500 to 2,000 g/mol.

9. The coating composition according to one or more of the preceding claims, characterized in that the at least one wax is a polyolefin wax, preferably a polyethylene wax, and particularly preferably a polyethylene wax having a weight average molecular weight of 500 to 2,000 g/mol.

10. The coating composition according to one or more of the preceding claims, characterized in that said inorganic filler is calcium carbonate or a mixture formed by calcium carbonate and magnesium carbonate, preferably dolomite.

11. The coating composition according to one or more of the preceding claims, characterized in that the proportion of the filler in the coating composition is from 10 to 80% by weight, preferably from 20 to 70% by weight, particularly preferably from 30 to 60% by weight and very particularly preferably from 40 to 55% by weight.

12. The coating composition according to one or more of the preceding claims, characterized in that the weight ratio of the filler and the ethylene-vinyl acetate copolymer of component a) is in the range of 20:80 to 90:10, preferably 30:70 to 80:20, in particular 40:60 to 70: 30.

13. The coating composition according to one or more of the preceding claims, characterized in that the solids content in the coating composition is at least 15 wt. -%, preferably at least 30 wt. -%, particularly preferably at least 40 wt. -%, and especially at least 50 wt. -%.

14. The coating composition according to one or more of the preceding claims, characterized in that it additionally comprises at least one blowing agent as component f), preferably selected from the group consisting ofGroup (b): hollow microsphere, metal carbonate, azodicarbonamide, oxybis-benzenesulfonyl hydrazide and C_3-10Alkanes and/or mixtures formed from two or more of the above compounds.

15. The coating composition according to one or more of the preceding claims, characterized in that it comprises:

a) from 20 to 50% by weight of an ethylene-vinyl acetate statistical copolymer which comprises no other comonomers than the comonomers ethylene and vinyl acetate,

b)1 to 20 wt% of a hydrocarbon resin selected from the group consisting of: aliphatic resins, cycloaliphatic resins, indene-benzofuran resins, polystyrene resins, polymethylstyrene resins and any mixtures of two or more of the above compounds,

c)0.5 to 15 wt.% of at least one polyolefin wax,

d)20 to 70 weight percent of a filler selected from the group consisting of: calcium carbonate, mixtures formed from calcium carbonate and magnesium carbonate, aluminum hydroxide, barium sulfate, and any mixtures formed from two or more of the foregoing compounds, and

e)0.05 to 5 wt.% of a carboxylic acid amide and/or a salt thereof according to formula (I), wherein R₁Is C_10-24Alkyl and R₂And R₃Are identical to or different from one another and represent hydrogen or a substituted or unsubstituted alkylamido radical,

wherein the sum of all ingredients is 100 wt%.

16. Coated substrate, and in particular coated wall, floor and ceiling finishing material, comprising a web-like substrate which is coated at least partially on at least one of its two sides with a coating composition according to one or more of the preceding claims.

17. The coated substrate of claim 16, wherein the substrate is selected from the group consisting of: wood, wood members, wood materials, paper, plastics, organic fibers, synthetic fibers, mineral compounds, metals, textiles, and combinations of two or more of the foregoing.

18. Method for producing coated substrates and in particular for producing coated wall, floor and ceiling finishing materials, wherein the method comprises the following method steps:

(i) providing a web-shaped substrate, preferably wallpaper;

(ii) providing a coating composition according to one or more of the preceding claims 1 to 15;

(iii) applying the coating composition to at least one segment or at least one side of the substrate, preferably to one of the two sides of the substrate over its entire area;

(iv) allowing the coating composition to cure, set and/or cool;

(v) optionally, printing the coating composition;

(vi) optionally, thermally deforming the coating composition;

(vii) optionally, laminating/gluing the film.

19. Method for producing a coated substrate according to claim 18, characterized in that the coating composition is applied to the web-shaped substrate according to a brushing method, a spraying method or a printing method, preferably according to a printing method.

20. The method of making a coated substrate of claim 19, wherein the printing method is selected from the group consisting of: a screen printing method, a gravure printing method, a relief printing method or an ink jet printing method, particularly preferably a rotary screen printing method, a flat screen printing method, a rotary gravure printing method, a flexographic printing method or an ink jet printing method,

21. a method of preparing a coated substrate according to claim 20, wherein the coating composition is printed with an aqueous printing ink, preferably with a printing method selected from a gravure printing method, a flexographic printing method, an inkjet printing method or a screen printing method.

22. Use of a coating composition according to one or more of the preceding claims 1 to 15 for the preparation of wall coverings, in particular wallpaper.

Technical Field

The present invention relates to a coating composition for the preparation of coated substrates, in particular for the preparation of coated wall, floor and ceiling finishing materials, for example for the preparation of coated wallpaper. In addition, the invention relates to a substrate, in particular a coated wall, floor and ceiling finishing material, such as a coated wallpaper, coated with said coating composition. The invention likewise relates to a process for preparing coated substrates and in particular for preparing coated wall, floor and ceiling finishing materials.

The coated substrates of the invention are characterized in particular by improved flatness and mountability and at the same time good printability and embossability.

Background

Coated wall, floor and ceiling facing materials are used in almost all public and private buildings. Although the coating on the floor covering, usually a polymer coating, should mainly improve the wear resistance and adjust the slip resistance of the floor covering, the purpose of the polymer coating on the wall finishing material, such as wallpaper, is especially to ensure good printability and easy cleanability. Widely used are wallpapers coated with polyvinyl chloride (PVC), which are often used as wall finishing materials in hotel rooms, bathtubs, showers, halls, staircases, kitchens, children's houses, schools, offices and government agencies because of their good cleanability and low flammability. The inherently more serious soils can be easily removed from these coated wallpapers with a brush and water or mild soap. Another notable field of application for PVC is foam-structured wallpaper on which a relief-like surface can be formed, which wallpaper imparts spatial dimensions to the pattern imaged on the surface.

However, wall, floor and ceiling finishing materials (such as wallpaper) comprising or coated with PVC have significant disadvantages. The chlorine-containing polymer PVC releases hydrogen chloride gas over time and forms highly toxic dioxins in the event of fire, so that coated wall, floor and ceiling finishing materials comprising PVC form a potential hazard to the health of occupants. In addition, wallpaper comprising PVC has an adverse effect on the room climate due to its lower water vapour transmission rate compared to paper wallpaper, which requires regular and good ventilation of the room decorated with it. Especially in energy-optimized buildings, in the case of PVC-containing wallpaper, this can lead to a worrisome high concentration of harmful substances, since 0.5 air exchanges per hour are set to the standard and ventilation through windows is eliminated.

For the reasons mentioned above, attempts have been made in recent years to replace PVC coatings on wall, floor and ceiling finishing materials by polymer coatings which are characterized by lower emissions of compounds harmful to health and less negative impact on the room climate and which do not produce or at least less produce toxic combustion products in the event of fire.

DE 4120306 a1 describes a method for producing structural foam wallpaper, in which a paper substrate web is coated with a homogeneous foam by means of a heated thermoplastic as adhesive, and the foam is then provided with the desired surface structure by means of an embossing roller. Polyethylene, polypropylene, polystyrene and polyesters, i.e.polymers which do not contain harmful halogens or other unacceptable substances, are particularly proposed as thermoplastics. However, in the case of such wallpapers, it is disadvantageous that these wallpapers curl or roll together very severely in the direction of the coating when applied to the wall, which makes application to the wall more difficult or impossible. This is particularly the case for wallpaper application by means of the wall-pasting technique, in which the paste is first applied to the wall in strips and uniformly with a roller or brush, then the wallpaper is applied and pressed against the sticker, for example with a clean cloth, a soft roller or a brush. This technique allows for simple and quick application of the wall covering to the wall, but requires a flat wall covering that remains flat even after application to the paste. Rolled or beaded wallpaper cannot be applied with this technique or at least cannot be applied with the desired result on the wall.

DE 19530508 a1 discloses a wallpaper with a visible side layer made of a nonwoven fabric of polyethylene fibers. Polyethylene fiber nonwovens consist of a thermo-mechanically cured fiber nonwoven formed from Polyethylene (PE) continuous fibers and have high strength on both sides in the dry and wet conditions and are not tearable under the loads common in practice. However, these wallpapers are disadvantageous in that only a few options are available in the design for the styling of the wallpaper surface. In addition, fine structures cannot be produced by means of such fibrous surfaces with the aid of embossing devices. Furthermore, the connection of very strongly swelling paper with high-strength, non-swelling PE nonwovens leads to severe curling, which renders the wall paper impossible to treat with wall-adhesive technology or only unsatisfactory results are obtained.

DE 8600174U 1 describes a wallpaper with a carrier layer made of paper and a visible side layer made of polyethylene, wherein the carrier layer is constructed from a plurality of paper layers and has a basis weight of 180 to 230 grams per square meter and the visible side layer made of polyethylene has a basis weight of at least 15 grams per square meter. However, this wallpaper is also not suitable for processing in wall-adhesive technology, since it is strongly curled.

DE 2659192 a1 proposes a printed wallpaper consisting of a paper carrier and a washable coating, wherein the coating consists of a transparent polyolefin. This wallpaper is also not suitable for application to walls with wall-adhesive technology, since polyolefins crystallize to a large extent and shrink during cooling, so that this wallpaper is distinguished by severe curling.

Disclosure of Invention

It is an object of the present invention to provide a coating composition which is particularly suitable for coating web-shaped articlesSubstrate and in particular for preparing a flexible material in roll formWall, floor or ceiling finishing material which at least ameliorates or avoids the above problems.

It is particularly desirable that the wall, floor or ceiling finishing material coated with the coating composition can also be processed with the application technique as flat as possible without curling or at least without significant curling. It is also advantageous that it can be printed as well as possible with conventional inks.

Another challenge is that coating compositions which can be used for preparing wall, floor or ceiling finishing materials release as little or no health-threatening compounds as possible, which compounds may have an adverse effect on the room climate, and/or do not generate or at least generate less toxic combustion products in the case of fire.

According to the present invention, this object is achieved by providing a coating composition for preparing coated substrates and in particular for preparing coated wall, floor and ceiling finishing materials, comprising:

a)15 to 80% by weight of at least one ethylene-vinyl acetate copolymer,

b)0.1 to 30 wt% of at least one hydrocarbon resin,

c)0.1 to 20% by weight of at least one wax,

d)0.1 to 80 wt% of at least one filler,

e)0.01 to 20 wt.% of at least one lubricant selected from the group consisting of: carboxylic acid amides, fatty alcohols, metal soaps, complex esters, and any mixtures of two or more of the foregoing, and

f) optionally, 0.0 to 10 wt% of a blowing agent,

wherein the sum of all ingredients of the composition is 100 wt%.

The coating composition can likewise be obtained by combining:

a)15 to 80% by weight of at least one ethylene-vinyl acetate copolymer,

b)0.1 to 30 wt% of at least one hydrocarbon resin,

c)0.1 to 20% by weight of at least one wax,

d)0.1 to 80 wt% of at least one filler,

e)0.01 to 20 wt.% of at least one lubricant selected from the group consisting of: carboxylic acid amides, fatty alcohols, metal soaps, complex esters, and any mixtures of two or more of the foregoing, and

f) optionally 0.0 to 10 wt% of a blowing agent,

wherein the sum of all ingredients of the composition is 100 wt%.

According to the invention, the sum of all the constituents of the coating composition is 100% by weight. If the coating composition consists of components a) to f), the sum of components a) to f) is 100% by weight. If the coating composition comprises, in addition to components a) to f), further components, for example additives h) and i), the sum of the components a) to i) is 100% by weight.

This solution is based on the following recognition: by the above-described combination of ethylene-vinyl acetate copolymer, hydrocarbon resin, wax and lubricant, a coating composition is obtained which, after coating of a corresponding web-like substrate, such as paper wallpaper, yields a coated substrate with particularly advantageous properties. These properties are, in particular, surface strength and abrasion resistance as well as hardness and heat resistance; in addition, printability and processability.

The corresponding coated substrates can be printed outstandingly, in particular, with customary printing inks and, in particular, aqueous printing inks in customary printing processes, such as gravure printing processes, flexographic printing processes, inkjet printing processes and screen printing processes.

One particular characteristic of the coating composition of the present invention is its low viscosity and short "open time". This is often an indicator for very crystalline materials. The coatings of the present invention have surprisingly small crystals. This results in advantages during the coating process and also in the case of conventional printing methods. The highly crystalline material shrinks on the substrate when cooled or hardened and thus causes the coating to curl. The machine operation possibilities are thus no longer guaranteed.

Due to the low crystallinity and the resulting flatness, substrates coated with the coating composition of the invention can also be applied to floors, walls or ceilings flat and without curling or at least without significant curling with a pasting technique in which, for example, first a paste is applied to the floor, wall or ceiling strip by strip and uniformly with a roller or brush, then a wall, floor or ceiling finishing material is applied thereto and pressed against it, for example with a clean cloth, soft roller or brush. Wallpaper coated with the coating composition of the invention can thus be applied flat to a wall in particular simply and reliably with wall-sticking techniques.

The coating composition of the invention is also particularly suitable for the preparation of structural foam wallpaper. In addition, the coating compositions of the invention do not release compounds that are harmful to health and in particular do not release halogen-containing compounds, since the coating compositions of the invention do not require the addition of halogen-containing compounds (such as PVC) or other polymers that release harmful compounds.

Furthermore, the coating compositions of the present invention have a suitable water vapor transmission rate, so that substrates coated with the coating compositions of the present invention do not have an adverse effect on the room climate. Finally, the coating composition of the invention, because of its composition, produces no or at least less toxic combustion products in the event of a fire.

Hydrocarbon resins in the sense of the present invention are understood to be compounds comprising carbon and hydrogen with a weight average molecular weight of 100 to 10,000 g/mol. Preferably at least 90% and more preferably at least 95% of the compounds are carbon and hydrogen atoms, whereas the remainder may be heteroatoms, such as nitrogen or oxygen atoms. The weight average molecular weight of the hydrocarbon resin is preferably 100 to 3,000 g/mol.

The hydrocarbon resin is preferably selected from the group consisting of: aliphatic resins, cycloaliphatic resins, indene-benzofuran resins, polystyrene resins, polymethylstyrene resins and any mixture of two or more of the above compounds.

The resin is particularly preferably selected from the group consisting of: cycloaliphatic resins, indene-benzofuran resins and/or polymethylstyrene resins. Further preferred are dicyclopentadiene resins, indene-benzofuran resins and/or poly-alpha-methylstyrene resins or mixtures thereof.

Indene-benzofuran resins or dicyclopentadiene resins having a weight-average molecular weight of from 200 to 1,000g/mol and/or poly-alpha-methylstyrene resins having a weight-average molecular weight of from 500 to 2,000g/mol are very particularly preferred. The most preferred embodiment is an indene-benzofuran resin. The latter are the polymerization products of benzofuran and indene and related compounds which are most well known to the person skilled in the art. This is often used in painting and coating processes.

The function of the hydrocarbon resin is in particular that of a plasticizer and/or a polymer modifier. It is also possible in particular to improve the adhesion and thus to perform the function of an adhesion promoter.

The word constituent "resin" does not have a meaning here that exceeds the above definition, i.e. the defined molecular weight and atomic composition.

According to the invention, the coating composition comprises 0.01 to 20 wt.% of at least one lubricant selected from the group consisting of: carboxylic acid amides, cetyl alcohol, stearyl alcohol, metal soaps, complex esters and any mixtures of two or more of the above compounds. The addition of the lubricant results in a reduction in the tack of the coating composition and helps to avoid curling of the substrate coated with the coating composition in addition to the ethylene vinyl acetate copolymer, the hydrocarbon resin and the wax.

Good results are obtained in particular when the at least one lubricant is a carboxylic acid amide according to the general formula (I) and/or a salt thereof,

wherein

R₁Is a substituted or unsubstituted, linear or branched alkyl group, a substituted or unsubstituted, linear or branched alkenyl group, a substituted or unsubstituted, linear or branched alkynyl group, a substituted or unsubstituted cycloaliphatic group, a substituted or unsubstituted alkyl group, a substituted orA substituted or unsubstituted aromatic group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted carboxyl group or a substituted or unsubstituted alkylamido group, and

R₂and R₃Are identical to or different from one another and denote hydrogen, substituted or unsubstituted, linear or branched alkyl, substituted or unsubstituted, linear or branched alkenyl, substituted or unsubstituted, linear or branched alkynyl, substituted or unsubstituted cycloaliphatic, substituted or unsubstituted aromatic, substituted or unsubstituted heterocyclic, substituted or unsubstituted alkoxy, substituted or unsubstituted alkoxycarbonyl, substituted or unsubstituted carboxyl or substituted or unsubstituted alkylamido.

It is particularly preferred to add to the coating composition as lubricant a carboxylic acid amide according to the general formula (I) wherein R is₁Is substituted or unsubstituted, straight-chain or branched C_1-25Alkyl, substituted or unsubstituted, straight or branched C_1-25Alkenyl, substituted or unsubstituted, straight-chain or branched C_1-25Alkynyl, substituted or unsubstituted C_6-20Cycloaliphatic radical, substituted or unsubstituted C_6-20Aromatic radical, substituted or unsubstituted C_1-20Heterocyclic group, substituted or unsubstituted C_1-25Alkoxy, substituted or unsubstituted C_1-25Alkoxycarbonyl, substituted or unsubstituted carboxyl or substituted or unsubstituted alkylamido, and R₂And R₃Are identical to or different from one another and represent hydrogen, substituted or unsubstituted, straight-chain or branched C_1-20Alkyl, substituted or unsubstituted, straight or branched C_1-20Alkenyl, substituted or unsubstituted, straight-chain or branched C_1-20Alkynyl, substituted or unsubstituted C_6-20Cycloaliphatic radical, substituted or unsubstituted C_6-20Aromatic radical, substituted or unsubstituted C_1-20Heterocyclic group, substituted or unsubstituted C_1-20Alkoxy, substituted or unsubstituted C_1-20Alkoxycarbonyl, substituted or unsubstituted carboxyl or substituted or unsubstituted alkylamido。

Good results are obtained, inter alia, in terms of a low tackiness of the coating composition when a carboxylic acid amide according to the general formula (I) and/or a salt thereof is added as a lubricant to the coating composition, wherein

R₁Is straight-chain or branched C_1-25Alkyl, straight or branched C_1-25Alkenyl, straight-chain or branched C_1-25Alkynyl, C_6-20Cycloaliphatic radicals, or C_6-20An aromatic group, and

R₂and R₃Are identical to or different from one another and represent hydrogen, straight-chain or branched C_1-25Alkyl, straight or branched C_1-25Alkenyl, straight-chain or branched C_1-25Alkynyl, C_6-20Cycloaliphatic radicals, or C_6-20An aromatic group.

In order to achieve a particularly low viscosity of the coating composition, it is proposed in a development of the invention to add to the coating composition a carboxylic acid amide according to the general formula (I) and/or a salt thereof as lubricant, wherein R₁Is C_10-24Alkyl and R₂And R₃Are identical or different from one another and represent hydrogen or a substituted or unsubstituted alkylamido radical.

It is particularly preferred that the coating composition comprises as lubricant a carboxylic acid amide according to the general formula (I) and/or a salt thereof, wherein R₁Is C_10-24Alkyl and preferably C_15-20Alkyl, and R₂Represents a substituted or unsubstituted alkylamido group, and R₃Represents hydrogen.

Very particularly preferred examples of suitable lubricants are secondary amides and most preferably octadecanamide and its salts.

However, other lubricants, such as, inter alia, metal soaps, complex esters and fatty alcohols, may also be used. According to the invention, metal soaps are salts of fatty acids and of resin acids and naphthenic acids with metals.

The metal soaps are preferably C2 to C30 monocarboxylic and/or dicarboxylic acids, preferably C12 to C20 monocarboxylic and/or dicarboxylic acids, particularly preferably stearic acid, sebacic acid, adipic acid and azelaic acid or mixtures thereof. Substituted mono-and/or dicarboxylic acid derivatives, in particular stearic acid derivatives and/or sebacic acid derivatives, can also be used. Particularly preferably, the monocarboxylic and/or dicarboxylic acids are especially selected from the group consisting of: hydroxystearic acid and/or hydroxystearic acid derivatives, hydroxysebacic acid and/or hydroxysebacic acid derivatives, in particular from 12-hydroxystearic acid.

The cation of the metal soap is preferably selected from the group consisting of: li, Na, K, Ca, Ba, Al and/or Zn, particularly preferably from the group consisting of: zn, Li, Na, K and Ca. A very particularly preferred metal soap is zinc stearate.

Also preferred are the potassium and/or sodium salts of terpene acids or the salts of naphthenic acids with metals.

If the metal soap comprises two different metal ions, for example sodium and potassium ions, the metal soap may also be referred to as a hybrid metal soap.

According to the invention, complex esters are understood to be reaction products of polyols and monocarboxylic and polycarboxylic acids, reaction products of polyols and monoalcohols and dicarboxylic acids, or reaction products of polyols and monoalcohols and monocarboxylic and dicarboxylic acids.

Suitable examples of complex esters include polyols and C_1-20Monocarboxylic acids and C_1-20Reaction products of dicarboxylic acids, preferably polyols and C_1-25Monocarboxylic acids and C_1-25Reaction products of dicarboxylic acids, and polyols and C are particularly preferred_5-25Monocarboxylic acids and C_5-25A reaction product of a dicarboxylic acid. Preferred polyols are pentaerythritol, glycerol, propylene glycol, ethylene glycol, xylitol, polyether polyols, and the like. Particularly preferred complex esters are neopolyol esters.

According to the invention, the fatty alcohol is an aliphatic, long-chain monohydric alcohol. In the case of primary fatty alcohols, the hydrocarbon residue is generally unbranched, and synthetic fatty alcohols may also be branched. Fatty alcohols having from 6 to 22 carbon atoms are preferred according to the invention. Particularly preferred are stearyl alcohol (1-stearyl alcohol) and cetyl alcohol (1-cetyl alcohol).

According to the invention, a wax is defined as the following: kneadable at 20 ℃, have a firm to breakable hardness, have a coarse to fine crystalline structure, are colored transparent to opaque but non-glassy, melt without decomposition above 40 ℃, are slightly liquid (i.e., are relatively low viscosity) slightly above the melting point, have a consistency and solubility that are strongly temperature dependent, and are polishable under slight pressure.

According to the invention, the wax is preferably selected from the group consisting of: polyolefin waxes (in particular polyethylene waxes), paraffin waxes, fischer-tropsch waxes, montan/ester waxes, amide waxes, natural waxes and PTFE (polytetrafluoroethylene) or mixtures thereof. Groups of these compounds are well known to those skilled in the art.

Particularly preferred are polyolefin waxes, especially polyethylene waxes. Polyethylene waxes (PE waxes) are formed by polymerization of the gaseous substance ethylene or by thermal decomposition of high molecular weight plastics.

It is particularly preferred that the at least one wax is a polyolefin wax, particularly preferably a polyethylene wax, and very particularly preferably a polyethylene wax having a weight average molecular weight of from 500 to 2,000 g/mol. It is also preferred to provide the corresponding waxes in the coating composition with a relatively small residual monomer content, i.e. preferably with a corresponding residual monomer content of less than 1,000ppm, more preferably less than 100ppm and very particularly preferably not more than 10 ppm. This helps to avoid emission of undesirable substances and odorous contaminants.

The proportion of lubricant in the coating composition is preferably from 0.025 to 10% by weight. Smaller amounts of lubricant lead to an insufficient reduction of the viscosity of the coating composition, whereas larger amounts do not contribute to a further reduction of the viscosity but impair the performance in terms of application technology of the coating composition. In view of this, it is further preferred that the proportion of lubricant in the coating composition is from 0.05 to 5% by weight, further preferably from 0.1 to 2% by weight and very particularly preferably from 0.2 to 1.5% by weight.

According to the invention, the coating composition comprises from 15 to 80% by weight of at least one ethylene-vinyl acetate copolymer. The addition of the ethylene-vinyl acetate copolymer contributes significantly to the suitable viscosity of the coating composition and, in combination with the lubricant, hydrocarbon resin and wax, to the reduction of curling of the substrate coated therewith.

In this respect, good results are in particular obtained when the at least one ethylene-vinyl acetate copolymer of the coating composition is a copolymer which comprises no further comonomers other than the comonomers ethylene and vinyl acetate. It is also preferred that the coating composition has a low residual monomer content of ethylene and vinyl acetate, i.e. a corresponding residual monomer content of preferably less than 1,000ppm, further preferably less than 100ppm and very particularly preferably not more than 10 ppm. This helps to avoid emission of undesirable substances and odorous contaminants.

In a further development of the invention, it is proposed that the at least one ethylene-vinyl acetate copolymer is a statistical copolymer, in particular very particularly preferably a statistical copolymer which, in addition to the comonomers ethylene and vinyl acetate, comprises no further comonomers. Such ethylene-vinyl acetate copolymers have proven particularly suitable in avoiding curling and in adjusting the suitable viscosity of the coating composition.

Surprisingly, it has been shown within the scope of the present invention that the proportion of vinyl acetate in the at least one ethylene-vinyl acetate copolymer not only influences the viscosity of the coating composition, but also the degree of curling of the substrate coated therewith. In this connection, it has proven advantageous if the proportion of vinyl acetate in the at least one ethylene-vinyl acetate copolymer of the coating composition is in the range from 15 to 80% by weight, further preferably in the range from more than 18 to 60% by weight, particularly preferably in the range from 20 to 50% by weight and very particularly preferably in the range from 25 to 40% by weight.

According to another particularly preferred embodiment of the present invention, the coating composition comprises at least one ethylene-vinyl acetate copolymer having a melt index of 10 to 500g/10 min, preferably 15 to 150g/10 min and particularly preferably 20 to 50g/10 min, measured at 190 ℃ and a test weight of 2.16 kg. Such ethylene-vinyl acetate copolymers are sufficiently high molecular to reliably avoid discharge of the copolymer from the coating composition even after a long time, and are outstandingly suitable for adjusting the optimum viscosity of the coating composition.

According to the invention, the proportion of the at least one ethylene-vinyl acetate copolymer in the coating composition is from 15 to 80% by weight. Smaller amounts of ethylene-vinyl acetate copolymer lead to inadequate viscosity regulation and inadequate curl reduction, whereas larger amounts do not achieve the other advantages in this respect but impair the performance properties of the coating compositions in terms of application technology. In view of this, it is preferred that the proportion of the at least one ethylene-vinyl acetate copolymer in the coating composition is from 18 to 60% by weight, further preferably from 20 to 50% by weight and very particularly preferably from 25 to 40% by weight.

According to the invention, the coating composition comprises 0.1 to 30 wt% of at least one hydrocarbon resin. The addition of the hydrocarbon resin contributes significantly to the suitable viscosity of the coating composition and, in combination with the lubricant, the ethylene-vinyl acetate copolymer and the wax, to the reduction of curling of the substrate coated therewith. In addition, hydrocarbon resins are important for adjusting suitable hardness, heat resistance, blocking tendency, and suitable softening point.

Good results are obtained in this respect in particular when at least one resin selected from the group consisting of: aliphatic resins, cycloaliphatic resins, aromatic resins, and any mixture formed from two or more of the foregoing compounds. It is also preferred to provide the corresponding resin in the coating composition with a relatively small residual monomer content, i.e. preferably with a corresponding residual monomer content of less than 1,000ppm, further preferably less than 100ppm and very particularly preferably not more than 10 ppm. This helps to avoid emission of undesirable substances and odorous contaminants.

In a further development of the invention, it is proposed that at least one resin selected from the group consisting of: aliphatic resins, cycloaliphatic resins, polystyrene resins, polymethylstyrene resins and any mixtures of two or more of the above-mentioned compounds, preferably cycloaliphatic resins, indene-benzofuran resins and/or polymethylstyrene resins, particularly preferably dicyclopentadiene resins and/or poly-alpha-methylstyrene resins, and very particularly preferably indene-benzofuran resins or dicyclopentadiene resins having a weight-average molecular weight of from 200 to 1,000g/mol and/or poly-alpha-methylstyrene resins having a weight-average molecular weight of from 500 to 2,000 g/mol. Such resins have proven to be particularly suitable in avoiding curling and in adjusting the suitable viscosity of the coating composition.

According to the invention, the proportion of the at least one hydrocarbon resin in the coating composition is from 0.1 to 30% by weight. Smaller amounts of hydrocarbon resins lead to insufficient action of the hydrocarbon resins, whereas larger amounts do not achieve the other advantages in this respect but impair the performance properties of the coating compositions in terms of application technology. In view of this, it is preferred that the proportion of the at least one hydrocarbon resin in the coating composition is from 1 to 20% by weight, further preferably from 2 to 15% by weight and very particularly preferably from 5 to 13% by weight.

According to the invention, the coating composition comprises 0.1 to 20 wt% of at least one wax. The addition of wax helps to adjust the appropriate viscosity of the coating composition and control the "open time" (which is an important factor in the coating process). In addition, waxes are important for adjusting suitable hardness, heat resistance, blocking tendency and suitable softening point. The amount of wax is preferably less than the amount of hydrocarbon resin.

Good results are especially obtained when the at least one wax comprised in the coating composition is a hydrocarbon wax and particularly preferably a saturated hydrocarbon wax.

According to the invention, the proportion of the at least one wax in the coating composition is from 0.1 to 20% by weight. Smaller amounts of wax lead to an insufficient action of the wax, whereas larger amounts do not achieve the other advantages in this respect but impair the performance properties of the coating composition in terms of application technology. In view of this, it is preferred that the proportion of the at least one wax in the coating composition is from 0.5 to 15% by weight, further preferably from 1 to 10% by weight and very particularly preferably from 2 to 8% by weight.

According to the invention, the coating composition comprises 0.1 to 80 wt% of at least one filler. By adding the filler, the flammability of the coating composition is reduced even without the addition of special flame retardants. The increased filler amount additionally contributes to the heat transfer of the coating composition, which is important not only for the coating process but also for the printing, foaming and embossing process. In addition, fillers are difficult to volatilize, so that their addition helps to reduce or avoid the emission of undesirable materials and odor contaminants from the coating composition.

Good results are achieved in this respect in particular when the coating composition comprises at least one inorganic filler as filler.

The inorganic filler is preferably selected from the group consisting of: calcium carbonate, mixtures formed from calcium carbonate and magnesium carbonate, aluminum hydroxide, barium sulfate, and any mixtures formed from two or more of the foregoing compounds. The coating composition particularly preferably comprises calcium carbonate or a mixture of calcium carbonate and magnesium carbonate, in particular in the form of dolomite, as filler.

It may also be advantageous that the coating composition comprises already expanded hollow microspheres as filler in addition to one or more inorganic fillers. Such organic fillers are also referred to as lightweight fillers and can be used, in particular, for reducing the specific gravity of the filler or for increasing the specific volume. Expanded polymer hollow spheres are particularly advantageous here.

Without being bound by scientific theory, the very high specific volume of such inorganic-organic fillers appears to be achieved by the interaction between the polymeric material and the inorganic filler.

According to the invention, the proportion of the at least one filler in the coating composition is from 0.1 to 80% by weight. Smaller amounts of filler lead to an insufficient achievement of the above-mentioned effects, whereas larger amounts do not achieve the other advantages in this respect but impair the performance properties of the coating composition in terms of application technology. In view of this, it is preferred that the proportion of the at least one filler in the coating composition is from 10 to 80% by weight, preferably from 20 to 70% by weight, particularly preferably from 30 to 60% by weight and very particularly preferably from 40 to 55% by weight.

In a development of the invention, it is proposed that the sum of the proportions of the ethylene-vinyl acetate copolymer and the filler in the coating composition is from 25 to 99% by weight, further preferably from 40 to 98% by weight, particularly preferably from 60 to 97% by weight and very particularly preferably from 70 to 96% by weight.

The weight ratio of ethylene-vinyl acetate copolymer of component a) to filler is preferably in the range from 80:20 to 10:90, preferably from 70:30 to 20:80, preferably from 60:40 to 30: 70.

In particular for producing foam-structured wallpaper, according to a further particularly preferred embodiment of the present invention it is proposed that the coating composition comprises, as component f), in addition to the above-described components a) to e), at least one blowing agent. Within the scope of the present invention, it is in principle possible to use any blowing agent, with good results being achieved in particular with a blowing agent selected from the group consisting of: hollow microsphere, metal carbonate, azodicarbonamide, oxybis-benzenesulfonyl hydrazide and C_3-10Alkanes and/or mixtures formed from two or more of the above compounds.

The coating composition preferably comprises hollow microspheres filled with a C3-10 alkane, preferably with a C3-8 alkane and particularly preferably with isooctane as blowing agent. The hollow microspheres or microcapsules used as blowing agent are expanded only shortly before the hot embossing device.

The amount of blowing agent in the coating composition can be adjusted depending on the desired degree of foaming. It has proven particularly advantageous for the proportion of blowing agent in the coating composition to be from 0.1 to 20% by weight, particularly preferably from 0.25 to 10% by weight and very particularly preferably from 0.5 to 5% by weight, such as in particular from 2 to 4% by weight, such as approximately 2% by weight. The best ratio of achievable foam height to required mechanical strength is thus obtained.

In addition, according to another embodiment of the present invention, the coating composition comprises, in addition to the above-described components a) to e) and optionally component f), additionally from 0.05 to 2% by weight of at least one antioxidant as component g).

Suitable antioxidants are well known to those skilled in the art. Preferably, antioxidants with low volatility and thus causing a further reduction of unwanted emissions can be used. Amine-free antioxidants are used in particular here. Thus, the antioxidant is preferably selected from the group consisting of: sterically hindered phenols, lactones (such as in particular benzofuran-2-one derivatives), sterically hindered phosphites or mixtures thereof.

Examples of sterically hindered phenols are pentaerythritol tetrakis (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, octadecyl-3- (3, 5-di-tert-butyl-4-hydroxyphenyl propionate), 3, 5-bis- (1, 1-dimethylethyl-4-hydroxy-C7-C9-alkyl branched ester, ethylene (dioxyethylene) bis- (3- (5-tert-butylhydroxy-4-tolyl) -propionate).

Examples of lactones, in particular benzofuran-2-one derivatives, are described, for example, in EP 1291384 and DE 19618786.

Sterically hindered phosphites, such as tris (2, 4-di-tert-butylphenyl) phosphite, are described, for example, in EP 905180.

Furthermore, the coating compositions may comprise, as component h), from 0 to 30% by weight, depending on the application, of at least one additive, for example a flame retardant and/or a colorant (such as titanium dioxide).

According to a first very particularly preferred embodiment of the present invention, the coating composition comprises:

a) from 20 to 50% by weight of an ethylene-vinyl acetate statistical copolymer which, apart from the comonomers ethylene and vinyl acetate, contains no further comonomers,

b)1 to 20 wt% of a hydrocarbon resin selected from the group consisting of: aliphatic resins, cycloaliphatic resins, indene-benzofuran resins, polystyrene resins, polymethylstyrene resins and any mixtures of two or more of the above compounds,

c)1 to 15 wt.% of at least one polyolefin wax,

d)20 to 70 weight percent of a filler selected from the group consisting of: calcium carbonate, mixtures formed from calcium carbonate and magnesium carbonate, aluminum hydroxide, barium sulfate, and any mixtures formed from two or more of the foregoing compounds, and

e)0.05 to 5 wt.% of a carboxylic acid amide according to formula (I)And/or salts thereof, wherein R₁Is C_10-24Alkyl, and R₂And R₃Are identical to or different from one another and represent hydrogen or a substituted or unsubstituted alkylamido radical,

wherein the sum of all ingredients is 100 wt%.

According to a second very particularly preferred embodiment of the present invention, the coating composition comprises:

a)25 to 40% by weight of an ethylene-vinyl acetate statistical copolymer which, apart from the comonomers ethylene and vinyl acetate, comprises no further comonomers, wherein the proportion of vinyl acetate in the ethylene-vinyl acetate copolymer is in the range from more than 18 to 60% by weight and the ethylene-vinyl acetate copolymer has a melt index of 15 to 150g/10 min at 190 ℃ and measured with a weight of 2.16kg,

b)2 to 15% by weight of a dicyclopentadiene resin preferably having a weight average molecular weight of 200 to 1,000g/mol and/or a poly-alpha-methylstyrene resin preferably having a weight average molecular weight of 500 to 2,000g/mol,

c) from 1 to 10% by weight of a polyethylene wax preferably having a weight-average molecular weight of from 500 to 2,000g/mol,

d)30 to 60% by weight of calcium carbonate or a mixture of calcium carbonate and magnesium carbonate, preferably dolomite, and

e)0.1 to 2 wt.% of a carboxylic acid amide and/or a salt thereof according to formula (I), wherein R₁Is C_15-20Alkyl, and R₂Represents a substituted or unsubstituted alkylamido group, and R₃Represents hydrogen, and is represented by the formula,

wherein the sum of all ingredients is 100 wt%.

In both of the above-mentioned very particularly preferred embodiments of the present invention, the coating composition may additionally comprise from 0.05 to 5% by weight of a blowing agent as component f), the blowing agent preferably being selected from the group consisting of: hollow microspheres, metal carbonates, azodicarbonamide, oxybis-benzenesulfonylhydrazide, C3-10 alkanes, and/or mixtures formed from two or more of the foregoing compounds.

As further noted previously, a particular advantage of the present invention is that no chlorine-containing polymer needs to be added to the coating composition to achieve the desired properties. It is therefore particularly preferred according to the invention that the coating composition does not comprise a chlorine-containing polymer.

In a further development of the invention, it is proposed that the coating composition comprises no further compounds in addition to the components a) to h) described above, i.e. that the coating composition consists of components a) to e), optionally f), optionally g) and optionally h).

Another subject of the invention is a coated substrate and in particular a coated wall, floor and ceiling finishing material comprising a web-shaped substrate which is coated at least partially on at least one of its two sides with the above-mentioned coating composition. The web-shaped substrate is preferably coated over its entire surface on both sides with the abovementioned coating composition.

The present invention is particularly suitable for coated substrates, wherein the substrate is selected from the group consisting of: wood, wood members, wood materials, paper, plastics, organic fibers, synthetic fibers, mineral compounds, metals, textiles, and combinations of two or more of the foregoing.

The substrate of the coated substrate is preferably a fabric or paper, and is preferably a non-woven fabric.

Furthermore, the invention relates to a method for producing a coated substrate, in particular for producing coated wall, floor and ceiling finishing materials, wherein the method comprises the following method steps:

i. providing a web-like substrate and preferably wallpaper;

providing a coating composition as described above,

applying the coating composition to at least one side of at least a section of the substrate and preferably to one of the two sides of the substrate over the entire area;

curing, solidifying and/or cooling the coating composition;

optionally, printing the coating composition;

optionally, thermally deforming the coating composition;

optionally, laminating or gluing the film.

A particular advantage of the coating composition of the invention is that it can be printed with all customary printing inks and printing techniques. The coating composition can thus be printed onto the coated substrate in particular with an aqueous printing ink, preferably with a printing process selected from the group consisting of the gravure printing process, the flexographic printing process, the inkjet printing process or the screen printing process.

The printed substrate can be thermally deformed in particular in the process for preparing the coated substrate.

For applying the coating composition to a web-shaped substrate, it may be advantageous to heat the coating composition in the range of 50 to 200 ℃, preferably 60 to 180 ℃. Temperature regulation enables a suitable coating viscosity and can make the processability of the coating composition easier.

Finally, the printed substrate can be hermetically covered with a protective layer and/or film.

The coating composition is preferably used for the preparation of wall coverings, in particular wallpaper.

In a further aspect of the present invention, it has been shown to be advantageous, in particular, to use the coating compositions of the invention in which at least one ethylene-vinyl acetate copolymer (a), at least one acrylate copolymer (B), at least one polyvinyl acetate copolymer (C) or mixtures thereof (D) are used in the form of a dispersion in a dispersing medium.

Accordingly, the present invention is directed in one particular aspect to a coating composition for preparing coated wall, floor and ceiling finishing materials (especially wallpaper), the coating composition comprising the following components:

a)2 to 80 wt.% of at least one ethylene-vinyl acetate copolymer (A), at least one acrylate copolymer (B), at least one polyvinyl acetate copolymer (C) or mixtures thereof (D),

b)0.1 to 80 wt% of at least one filler,

c)0.0 to 20% by weight of optionally at least one wax,

d)0.0 to 20 wt% of optionally at least one lubricant,

e)0.0 to 10 wt% of optionally at least one polymer or copolymer comprising at least one group selected from the group consisting of: esters, melamine, urea, formaldehyde, ethers, epoxides, urethanes, acrylic acid, methyl methacrylate, or mixtures thereof,

and

f)0.0 to 10 wt% of an optional blowing agent,

wherein the sum of all components is 100% by weight, characterized in that at least one copolymer of component a) is present in the dispersion medium.

The above definitions apply equally to this particular aspect of the invention, as long as it is not explicitly stated otherwise in the following.

"Dispersion" in the sense of the present invention means a heterogeneous mixture formed from the at least one copolymer (A) to (D) of component a) and the dispersion medium in which the at least one copolymer of component a) is dispersed.

The dispersion medium may be a solid or a liquid and may be selected such that the compound to be dispersed is insoluble in the dispersion medium.

Suitable dispersion media for the at least one ethylene-vinyl acetate copolymer are known to the person skilled in the art and may be selected, for example, from: water, aliphatic or cyclic hydrocarbons, alkyl alcohols, glycols, alkylene diamines, aqueous salt solutions, aqueous ammonia solutions, hydrogen peroxide, formaldehyde, phosphoric acid, formic acid, sodium or potassium hydroxide or aqueous solutions of sodium or potassium hydroxide, or mixtures thereof.

The use of aqueous polymer dispersions in manufacturing processes preferably comprising one or more drying or heating steps may be preferred compared to the addition of organic dispersion media, because of the reduced health risks to the environment and the user.

Thus, the dispersion medium in a preferred embodiment is selected from the group consisting of water, aqueous salt solutions or mixtures thereof. The dispersion medium is in particular water.

Thus, in a particularly advantageous embodiment, the copolymers (a) to (D) of component a) can be present as aqueous polymer dispersions.

Good results are obtained in particular at water proportions in the range from 1 to 90% by weight, preferably from 10 to 70% by weight, further preferably from 15 to 60% by weight, particularly preferably from 20 to 50% by weight, in particular from 25 to 45% by weight.

Preferably, the copolymer of component a) is dispersed by means of a mixing device, preferably a dissolver-stirrer, a rotor-stator mixer or similar device which allows intensive dispersion of the mixture.

Additional ingredients may optionally be contacted with (i.e., dispersed into) the at least one copolymer with agitation. Forming the dispersion may facilitate a uniform distribution of the individual components of the coating composition and thus advantageously affect the quality of the obtained product.

Such coating compositions of the invention comprising an aqueous polymer dispersion additionally have the following advantages: it can be solidified, for example, by simple drying or evaporation without generating harmful waste vapours.

Furthermore, it can be easily processed and it has particularly advantageous flow properties. Thus, in a particularly advantageous embodiment, the present invention relates to coating compositions whose copolymer of component a) is present in an aqueous dispersion.

Good results are achieved when at least two copolymers of component a) are used for preparing the coating composition. The at least two copolymers can also be selected from the same copolymer group here. Thus, for example, both copolymers may be acrylate copolymers (B). It is likewise possible to combine at least two different copolymers, for example ethylene-vinyl acetate copolymers (a), with acrylate copolymers (B) and/or polyvinyl acetate copolymers (C). All conceivable permutations are included in this respect.

It has furthermore been shown that particularly advantageous results are obtained when the glass transition temperatures (Tg) of the at least two copolymers of component a) are different.

"glass transition temperature" (Tg) refers to the softening point at which segments of a polymer become mobile and can undergo translational motion. The glass transition temperature of a polymer or copolymer is affected by different factors. One factor is the degree of branching of the polymer or copolymer. In the case of copolymers, the glass transition temperature is also significantly influenced by the weight ratio of the comonomers used.

Coating compositions comprising copolymers (A) to (D) of component a) having a glass transition temperature (Tg) in the range from-100 to 200 ℃, preferably from-100 to 100 ℃, further preferably from-70 to 100 ℃, particularly preferably from-50 to 20 ℃ are particularly preferred.

If the coating composition of the invention comprises more than one copolymer of component a), the relative difference in the respective glass transition temperatures is at least 5 ℃, preferably at least 10 ℃, particularly preferably at least 15 ℃.

In a development of the invention, it is proposed that the at least one copolymer dispersion of component a) has a solids content of at most 80% by weight, preferably in the range from 20 to 70% by weight, particularly preferably in the range from 40 to 60% by weight, in particular in the range from 45 to 55% by weight.

In a further embodiment of the invention, it is provided that the weight ratio of copolymer of component a) to filler is in the range from 99:1 to 50: 50% by weight, preferably from 95:5 to 60: 40% by weight, particularly preferably from 90:10 to 70: 30% by weight.

Optionally, in another embodiment of the present invention it may be advantageous to add another polymer or copolymer as component e) to the coating composition. Such polymers or copolymers may be present in the dispersion medium, in particular in water, as described above for the copolymers (a) to (D) of this aspect. In a particularly preferred embodiment, these polymers or copolymers comprise at least one group selected from the group consisting of: esters, melamine, urea, formaldehyde, ethers, epoxides, urethanes, acrylic acid, methyl methacrylate, or mixtures thereof. Thus, polymers or copolymers of, for example, polyesters, aminoplasts, polyethers, polyurethanes, polyacrylates, polymethyl methacrylates or mixtures thereof are obtained.

"polyester" in the sense of the present invention means a compound consisting of monomeric building blocks comprising at least one ester group. An "ester" is a group of matter formed by the reaction of an acid and an alcohol with the removal of water. Organic or inorganic acids may be used as the acid. Examples of organic acids are especially carboxylic acids and amino acids. By inorganic acids are understood, for example, compounds such as phosphoric acid, sulfuric acid, boric acid or carbonic acid. "alcohol" refers to all compounds having one or more hydroxyl groups (-O-H) and attached to an aliphatic carbon atom.

"aminoplasts" belong to the group of synthetic resins and are produced by carrying out condensation reactions (i.e. polycondensation) of carbonyl compounds (-C ═ o (r)) and compounds bearing at least one NH group a plurality of times. Formaldehyde is preferably used as the carbonyl compound. Preferred examples of compounds having NH groups are melamine, urea or dicyandiamide. For aminoplasts, urea resins, melamine resins or dicyandiamide resins, for example, are thereby obtained.

The term "melamine" here encompasses substituted 2,4, 6-triamino-1, 3, 5-triazines in addition to unsubstituted 2,4, 6-triamino-1, 3, 5-triazine.

The following compounds are described by the name "polyether": said compound carrying at least one ether group-an oxygen atom carrying two hydrocarbon residues, is represented by (R-O-R). The corresponding hydrocarbon residues may be the same or different and include aliphatic mono-or polyunsaturated hydrocarbons (which may be chain-like or cyclic). The polyether may comprise at least one epoxide at the end, in which case it is also referred to as "epoxy resin".

"polyurethane" belongs to the group of synthetic resins and refers to a compound consisting of a plurality of monomeric building blocks bearing at least one urethane group. "Carbamate" is a salt or ester of carbamic acid (RN-COOH). These esters are also known as "urethanes".

In the sense of the present invention, "polyacrylate" means a polymerization product formed from at least two esters of acrylic acid (i.e. acrylates) and/or methacrylic acid.

In a development of this aspect of the invention, waxes may optionally be added to the coating composition of the invention as component c). The wax is defined as described herein. However, in the case of polyolefin waxes and in particular polyethylene waxes, particularly good results are obtained when polyethylene waxes having a weight average molecular weight of from 2,000 to 30,000g/mol, preferably from 5,000 to 20,000g/mol, particularly preferably from 7,000 to 12,000g/mol, are added.

In addition, to match the actual requirements, further customary auxiliaries can be added to the coating compositions as components h) and i) in customary amounts, as defined herein. If the coating composition comprises, in addition to components a) to f), further auxiliaries h) and/or i), the sum of the components a) to i) is also 100% by weight in this respect.

In addition, the present invention relates to a method for preparing a coating composition comprising the steps of:

(i) providing a coating composition as defined herein;

(ii) dispersing the coating composition in water.

Furthermore, the invention relates to a method for producing a coated substrate, in particular for producing coated wall, floor and ceiling finishing materials, wherein the method comprises the following method steps:

i. a web-like substrate and preferably wallpaper is provided,

providing a coating composition as described above, characterized in that at least one copolymer of component a) is present in a dispersion medium, said dispersion medium being defined as described herein.

Applying the coating composition to at least one side of at least one section of the substrate and preferably to one of the two sides of the substrate over the entire area,

drying the coating composition to form a dry coating,

v. optionally printing the coating composition

Optionally thermally deforming the coating composition,

optionally laminating or gluing the film.

The drying of the described coating compositions can be carried out, for example, at room temperature by simply evaporating the dispersion medium. The drying of the coating composition is preferably carried out in such a way that, after drying, less than 10% by weight, preferably less than 5% by weight, in particular less than 3% by weight, of residual moisture is present.

In a particularly preferred embodiment of this aspect, the drying of the coating composition is carried out in the range from 80 to 220 ℃, preferably from 90 to 200 ℃, particularly preferably from 95 to 180 ℃.

The temperature range for drying is preferably set here such that expansion of the microspheres serving as a blowing agent does not yet take place during drying.

Preferred compositions may have the following formulation:

example A: