Board and method for manufacturing a board

1. A panel for interior decorative use, comprising:

a basic material layer defined by a cement-based substrate;

a top layer giving a decorative appearance to the panel and located on a surface of the cement-based substrate;

wherein the basic material layer is provided with polyurethane restricting moisture intake in the basic material layer;

wherein the top layer comprises a Direct Pressure Laminate (DPL) top layer;

wherein the polyurethane includes a crosslinker as an adhesion promoter, wherein the polyurethane is at least dispersed in the cement-based substrate.

2. The panel of claim 1 , wherein the polyurethane is provided at least in a proximity of a side of the basic material layer comprising said top layer.

3. The panel of claim 2 , wherein the polyurethane is at least provided at a respective surface of the basic material layer or directly thereunder.

4. The panel of claim 1 , wherein the polyurethane is provided almost exclusively or exclusively in a proximity of a side of the basic material layer comprising said top layer or a side opposite thereto, whereas the application of polyurethane is not or almost not present in a middle of the basic material layer.

5. The panel of claim 1 , wherein the polyurethane is provided over an entire thickness of the basic material layer.

6. The panel of claim 1 , wherein the polyurethane is arranged on or next to a surface of the basic material layer, and at least at a side where a top layer or backing layer is to be provided, seen in a thickness of the panel.

7. The panel of claim 1 , wherein the polyurethane is provided, at least on or next to a surface of the basic material layer, and at least at a side where a top layer or backing layer is to be provided, a reaction with water from an atmosphere or from the basic material layer.

8. The panel of claim 1 , wherein the polyurethane enhances hydrophobicity, wherein the polyurethane is incorporated into the cement-based substrate at least on or next to a surface thereof.

9. The panel of claim 1 , wherein the polyurethane forms a filler or matrix of material being water-impervious or water-repellent.

10. The panel of claim 1 , further comprises a silane or siloxane-containing liquid dispersed in the cement-based substrate.

11. The panel of claim 1 , further comprises metal soaps dispersed in the cement-based substrate.

12. The panel of claim 1 , further comprises an additive, respectively, of hydrophobic powder, of silicates with hydrophobic features dispersed in the cement-based substrate.

13. The panel of claim 1 , wherein the polyurethane provides for a reduction of a porosity of the basic material layer or a reduction of a capillary effect thereof or an increase of a density thereof.

14. The panel of claim 1 , wherein one or more of the following chemical products are dispersed in the cement-based substrate: acrylic and metacrylic polymers, polyvinyl alcohol or ethylene-vinyl acetate polymers, styrene/acrylic acid ester copolymers, silane and siloxane of silicone.

15. The panel according to claim 1 , wherein said top layer provides in a coating, either lacquer or print or layer adhered thereto, wherein the cement-based substrate comprises fibers or fillers or filling agents, additionally to process fibers, wherein these fillers or fibers consist of synthetic material or glass or crystalline calcium silicate or xonolite or tobermorite or inosilicate or gyrolite or wollastonite or sepiolite or rhyolite or basalt or rock wool or diabase or pumice or chalk or limestone or talc, wherein in a particle-shaped filler, the filler comprises particles comprised between 1 and 200 microns or the filler forms at least 10 percent by weight of a dry cement mixture.