A biodegradable adhesive

Using a biodegradable adhesive selected from adhesives based on ionic or nonionic starch ethers or 2-component PU adhesives based on hydroxyl-group-containing polyesters with aliphatic or cycloaliphatic isocyanate crosslinking agents, as a laminating adhesive for bonding polymer films and / or paper films. In particular, biodegradable laminating adhesives are described, consisting of a polyol component consisting of 60 to 99 wt .-% of at least one non-branched polyester polyol, 1 to 40 wt .-%, based on the polyol additives or adjuvants as well as a crosslinking component selected from aliphatic or cycloaliphatic polyisocyanates in an NCO / OH ratio of 1.5: 1 to 7.5: 1st