Provided is an antimicrobial non-isotactic polymer based hard or semi-flexible surface in a thermoset and/or thermoplastic resin matrix wherein the active antimicrobial ingredient is copper oxide! Processes for preparing the same and applications thereof are also described. The invention is directed to polymeric solid panels and slab possessing and polymer resin treatments imparting antibacterial, antifungal, antiviral and sporicidal properties.MATERIAL SÓLIDO COMPUESTO ESTRUCTURAL QUE COMPRENDE UNA RESINA POLIMÉRICA Y PARTÍCULAS DE ÓXIDO DE COBRE DISPERSAS EN ELLA EN UNA CONCENTRACIÓN ENTRE 10-50% P/P.