| abstract |
Method for electroless coating of substrates comprising the steps: I. providing a substrate, II. Optionally cleaning the substrate, III. Applying an activation layer of polyelectrolyte and / or salt with a first aqueous composition (= activating agent), IV. Optionally intermediate drying of the activation layer, V. rinsing the activation layer, wherein the activation layer is not completely removed, VI. Contacting and coating the activated surfaces remaining after rinsing with an aqueous composition in the form of a solution, emulsion and / or suspension for forming an organic secondary layer (= precipitation layer), VII. Optionally rinsing the subsequent layer, VIII. Drying, wherein the activating layer comprises an aqueous activating agent in the form of a solution, emulsion and / or suspension containing at least one cationic polyelectrolyte and / or at least one cationically active salt dissolved in water, the aqueous composition precipitable, precipitable and / or precipitable to form the follower layer has saltable ingredients which are anionically, zwitterionically, sterically and / or cationically stabilized, wherein the anionic and cationically stabilized ingredients do not affect, and wherein the thereby formed dry film of the activation layer and the subsequent layer has a thickness of at least 1 micron. |