. . . . . "Coating formulation according to any one of claims 1-5, wherein G is a residue of a hydrophilic polyfunctional compound, preferably chosen from the group consisting of polyethers, polyesters, polyurethanes, polyepoxides, polyamides, poly(meth)acrylamides, poly(meth)acrylics, polyoxazolidones, polyvinyl alcohols, polyethylene imines, polypeptides and polysaccharides, such as cellulose or starch or" .