| 摘要 |
Rolled metal substrate of aluminium, aluminium alloys or steel with a layer of an organic based and preferably clear and glossy lacquer/varnish. The lacquer/varnish or gel-coat comprises controlled amounts of inorganic polymer particles mainly with a size mainly in the range 1-100 nm, the particles being able to form a three-dimensional network that is independent of the organic network of the lacquer or with bondings to this network. The polymer particles are typically a reaction product obtained by hydrolysis and condensation reactions of monomer compounds chosen among the following groups: i) M(OR)n, or ii) R'-M(OR)n, where M is a metal ion, and R is an organic group chosen among alkyl, alkenyl, aryl or combination of such groups with from 1 to 8 carbon atoms, R'=R or R-X, where X is an organic group like e.g. amine, carboxyl or isocyanate, and n is an integer between 1 and 6. Alternatively the polymer particles may comprise natural or synthetic clay based powders or combinations of such powders. The invention further relates to a utilization of such a lacquer/varnish for coil coating of rolled surfaces of aluminium, aluminium alloys or steel. |
