Polyurethane coating for protecting concrete floors using the system with fillers produced by recycling

The top layer of the systems covering a concrete surface is made of polyurethane. The polyurethane layer should be characterized by high tensile strength and abrasive wear resistance, because this material is used in workshops, corridors, and warehouses. Up till now the systems have been a mixture of polyurethane and different fillers. The recyclate from polyurethane waste added to the systems can modify their properties. Our purpose was to produce and to test the composites supplemented with recyclates of different hardness. The influence of the proportion of wastes on the composite properties was investigated as well. As a result we obtained the materials of higher resistance to abrasive wear and of higher values of Youngʹs modulus and with unchanged resistance to tensile strength, ultimate elongation and bending. Furthermore a permanent deformation of the materials tested was decreased. The recyclates of the 50°ShD hardness increase the abrasive wear resistance of compasites by 50%, whilst the cost of the material is reduced.