Composite material with coating layer

Method for producing a composite material having a surface which has a high mechanical resistance wherein a material loss in the Taber Abrasion Test is ≤50 mg per 100 cycles, comprising the steps:

• a) providing a first composition comprising at least one first binder and at least one particulate first filler fraction,
• b) providing at least one second binder and at least one particulate second filler fraction, wherein particles of the second filler fraction have a mean size (d50 laser diffraction (Malvern) and/or SediGraph) of ≤0.5 mm and a mineral hardness (Mohs scale of mineral hardness)≥6, wherein the second filler fraction comprises particles selected from a group comprising quartz sand, quartz flour, cristobalite sand and flour, dolomite flour, calcium carbonate, lime and other carbonates, aluminum oxide, corundum, quartz glass, borosilicate glass, silicon carbide, ATH, and surface modified ATH, magnetic material, electric conductive material, antibacterial material and/or mixtures thereof, wherein the second filler fraction further comprises additional particles having a different average particle size (d50 laser diffraction (Malvern) and/or SediGraph) than the particles having a mineral hardness≥6, wherein the average particle size (d50 laser diffraction (Malvern) and/or SediGraph) of the particles have a mineral hardness≥6 is larger by a factor of ≥1.5 than the average particle size (d50 laser diffraction (Malvern) and/or SediGraph) of the additional particles, wherein the additional particles occupy cavities formed by the particles having a mineral hardness≥6,
• c) providing a mold,
• d) coating an inner surface of the mold with
• a layer of a second composition comprising the second binder, the particulate second filler fraction and the additional particles, or
• a layer of the second binder and a subsequent layer comprising the particulate second filler fraction,
• e) allowing the second binder and/or the second composition to increase its viscosity,
• f) filling the first composition into the mold, and
• g) allowing the first composition to harden.