Coated panel and method for manufacturing a coated panel

1. A method for the manufacturing of a coated panel, in particular a wall, ceiling or flooring panel for applications in outdoor areas, comprising the following steps:

a) providing a carrier plate of mineral wool and/or glass wool, having a major front surface and a rear surface;

b) applying a primer onto the major front surface of the carrier plate; wherein the primer comprises isocyanates;

c) thereafter, applying a liquid first oligomer in an amount of 30 to 150 g/m 2 onto the front major surface of the carrier plate;

d) thereafter, applying a second liquid oligomer, which is different from the first oligomer, in an amount of 30 to 180 g/m 2 onto the wet surface of the first oligomer layer applied in step c); and

e) thereafter, curing of the applied oligomers.

2. The method according to claim 1 , wherein the first oligomer is applied in step c) in two or more partial steps.

3. The method according to claim 1 , wherein step c) in a first partial step, the first oligomer is applied in an amount of 30 to 100 g/m 2 , this amount is slightly gelled and in a second partial step, another 10 to 50 g/m 2 of this first oligomer is applied, onto the slightly gelled surface of the oligomer that was applied in the first partial step.

4. The method according to claim 1 , wherein the first oligomer is a polyurethane acrylate, respectively based thereon.

5. The method according to claim 1 , wherein the second oligomer is composed of the same chemical compounds as the first oligomer, however, in a different mixture, so that after curing the second oligomer has a greater hardness than the first oligomer.

6. The method according to claim 1 , wherein the isocyanates comprise aliphatic or cyclo-aliphatic compounds, di- and polyisocyanates with an NCO functionality of at least 1.8 and/or the corresponding isocyanurates, biuretes, allophanates and uretdiones.

7. The method according to claim 1 , wherein the primer comprises isocyanates and alkyl methacrylates.

8. The method according to claim 1 , wherein the cured oligomer layers have a tensile strength of 3 to 30 N/mm 2 .

9. The method according to claim 1 , wherein the cured oligomer layers comprise a Young's modulus of 400 to 3000 N/mm 2 .

10. The method according to claim 1 , wherein the oligomers comprise at least one photo initiator.

11. The method according to claim 1 , wherein the carrier plates are provided on their sides with coupling means in the form of groove and tongue elements, which allow a connection of several identical panels in directions parallel to the major front surface as well as perpendicular to the major front surface by means of a form fitting connection.

12. The method according to claim 1 , wherein after step b), but for before step c), a decor layer is printed onto the major front surface of the carrier plate.

13. The method according to claim 1 , wherein the carrier plate has a thickness between 3 and 20 mm.

14. The method according to claim 1 , wherein the application in step c) is done by rollers and in step d) is done by curtain coating or by spraying.

15. The method according to claim 1 , wherein the first oligomer is applied in an amount of 30 to 150 g/m 2 .

16. The method according to claim 1 , wherein the second oligomer is applied in an amount of 30 to 180 g/m 2 .

17. The method according to claim 1 , wherein the primer is applied in an amount of 3 to 300 g/m 2 .

18. A panel obtainable by a process in accordance with claim 1 .

19. A panel, in particular wall, ceiling or flooring panel for applications in outdoor areas, comprising a carrier plate of mineral wool and/or glass wool, having a front major surface and a rear surface, whereby the front major surface comprises a layer system having the following layers in the given order as seen from the carrier plate:

a) a primer layer based on isocyanate;

b) a first layer based on a first cured oligomer;

c) a second layer based on a second cured oligomer, which differs from the first oligomer.

20. The panel according to claim 19 , wherein the first oligomer is a polyurethane acrylate.

21. The panel according to claim 19 , wherein the second oligomer consists of the same chemical compounds as the first oligomer, however, in a different mixture, so that the second oligomer has a greater hardness as the first oligomer, when cured.

22. The panel according to claim 19 , wherein the isocyanate comprises aliphatic or cyclo-aliphatic compounds, di- and polyisocyanates with an NCO functionality of at least 1.8, and/or the corresponding isocyanurates, biuretes, allophanate and uretdiones.

23. The panel according to claim 19 , wherein the primer comprises isocyanates and alkyl methacrylates.

24. The panel according to claim 19 , wherein the oligomer layers after curing have a tensile strength of 3 to 30 N/mm 2 .

25. The panel according to claim 19 , wherein the cured oligomer layers comprise a Young's modulus of 400 to 3000 N/mm 2 .

26. The panel according to claim 19 , wherein the oligomers comprise at least one photo initiator.

27. The panel according to claim 19 , wherein the carrier plate is provided on its sides with coupling means in the form of groove and tongue elements, which allow a coupling of several identical panels in directions parallel to the major front surface as well as perpendicular to the major front surface by means of a form fitting connection.

28. The panel according to claim 19 , wherein the carrier plate has a thickness between 3 and 20 mm.