| abstract |
The present invention relates to polyaspartic esters obtainable by reacting at least one polyamine component A) comprising an amine compound of the formula (I) in which X is a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or aromatic organic radical which is substituted or unsubstituted and / or has heteroatoms in the chain, Y is a secondary amino group bonded to two carbon atoms, R 1 and R 2 independently of one another are saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic or aromatic organic radicals having 1 to 18 carbon atoms, which are substituted or unsubstituted and / or have heteroatoms in the chain and n is a natural number from 1 to 4, with at least one polyisocyanate component B) comprising a polyisocyanate containing at least one chemically bonded, nonionic, hydrophilic group, characterized in that the number of secondary amino groups Y to the number of isocyanate groups of the polyisocyanate in a ratio of 250: 1 to 3: 1 stands. Further objects of the invention are a process for the preparation of a coating composition, a two-component system, its use for producing a coating on a substrate and the substrates coated therewith. |