Abstract:
The invention relates to a thermoplastic polyurethane containing noble metal salts, preferably salts of gold, silver, mercury, platinum, ruthenium, rhodium, palladium, osmium and/or iridium, preferably, in addition to the noble metal salts, at least one salt of an element of the fourth and/or fifth sub-group in the periodic table of the elements, especially, preferably as noble metal salts, silver salts, especially AgNO3 and/or AgCI. The invention also relates to animal ear marks, preferably laser-marked animal ear marks containing the thermoplastic polyurethane according to the invention. The invention also relates to methods for the laser inscription of thermoplastic polyurethane, the thermoplastic polyurethane according to the invention being inscribed by means of a laser.