the present invention concerns biodegradable linear polyester urethanes as well as biodegradable crosslinked polyester urethanes issuing from the linear polyester urethanes in such a way that they are crosslinked by diisocyanate bridges . by varying the degree of crosslinking it is possible to adjust the physical , chemical and biological properties in the crosslinked polyester urethane as defined by the invention in a targeted manner . in particular , it is possible to vary the rate of biodegradation of said crosslinked polyester urethane because the biological degradation takes place at a slower rate as the degree of crosslinking increases . furthermore , the object of the invention is a method of producing the polyester urethanes as defined by the invention , as well as its application in the form of sheets or foils , shaped rubber articles , containers , packaging materials , in the field of galenic pharmacy ; and in the form of adhesives and adhesive tapes and the like . furthermore , the invention relates to polymer blends containing the polyester urethanes as defined by the invention .