| abstract |
This invention relates to thermoplastic poly (urethane-ureas) (TPU) having inherent biocidal properties.n n n The invention encompasses a process for producing thermoplastic poly (urethane ureas) having biocidal properties by reacting an A component with a B component in the presence of additives, wherein the A component is the partial components A1) one or more long-chain dihydroxy compounds such as polyester diols, polyether diols, polytetrahydrofurans, polycaprolactones, polycarbonate diols and / or poly-α, ω-dihydroxybutadiene, A2) one or more short-chain diols, such as butane-1,4-diol, hexane-1,6-diol, ethylene glycol, diethylene glycol, A3) one or more secondary diamines, if appropriate A4) one or more catalysts, and the B component the subcomponents B1) one or more diisocyanates or B2) prepolymers based on diols with 0 to 50% by weight of free (monomeric) diisocyanates, which is characterized in that the reaction is carried out in the presence of a further subcomponent A5) containing one or more biocidally active compounds having at least one -NH- or -NH 2 function in the molecule, and simultaneously or subsequently further processing the poly (urethane) ureas). |