Process for surface treatment.

Use of copolymers (A), while integrated copolymerized comonomers containing (a) ethylene, (b) one or more diesters alkenyl phosphonic acid, any other comonomer or (c ') at least one or more copolymerizable comonomers radical selected from ethylenically unsaturated carboxylic acids and dicarboxylic acids, ethylenically unsaturated C4-C10 and their anhydrides, C1-C10 alkyl (meth) acrylic acid, formic acid vinylester, vinylester alkylcarboxylic acid C1-C10, allyl ethers and alkylvinyl C1- C20 α-olefins and having 3 to 40 carbon atoms for the treatment of surfaces.