Solutions of solution copolymers of 60 to 90 percent of (meth) acrylic esters of alkanols containing from four to ten carbon atoms, 0.15 to 3 percent of olefinically unsaturated alkanediol monoesters and olefinically unsaturated alkoxymethylamides with or without up to 39 percent of other olefinically unsaturated monomers can be used for the production of contact adhesive layers having particularly advantageous properties.