Abstract: The invention relates to the field of polymers, in particular to polymer systems based on polyurethane (PU) having abroad spectrum biocidal activity and the use thereof in the manufacture of biocidal products. Provided is a process to provide a biocidal polyurethane-iodin e (PU-I) complex, comprising (i) dissolving at least one iodine source into one or more raw materials used for preparing the desired polyurethane (PU) to obtain a single phase iodine system, followed by (ii) conducting a PU polymerization reaction in the presence of the single phase iodine system to generate a biocidal PU-I complex in situ.

Abstract: The invention relates to the field of polymers, in particular to polymer systems based on polyamide (PA) having broad spectrum biocidal activity and the use thereof in the manufacture of biocidal products. The blends are produced by hot melt extrusion. Provided is a miscible blend of polyamide-iodine (PA-I), preferably comprising at least 0.1 iodine, preferably at least 0.5 wt % iodine. Also provided is a biocidal product comprising a blend according to the invention.