| abstract |
In a method for producing hydrophilic coatings on aluminum surfaces, an aqueous solution or dispersion is applied to the surfaces, which consists of a monomer of the general formula Where R₁ = H or CH₃ R₂ and R₃ = H, an aky group with C₁ to C₄, a benzy or alkanol group with C₂ - C₃ mean, contains an unsaturated cationic monomer and an unsaturated anionic monomer amphoteric polymer (A) and / or an after-treatment of the homo- or copolymer (B) formed from the monomer (I), and dries them up.n n n Preferred embodiments of the method provide for a boehmite layer or a chemical conversion coating, such as a chromate coating, to be applied before the polymer coating is produced and / or a water glass solution to be applied and dried onto the polymer coating. |