COATING MATERIAL COMPOSITIONS AND COATINGS PRODUCED THEREFROM WITH HIGH SCRATCH RESISTANCE AND GOOD POLISHABILITY AND GOOD OPTICAL PROPERTIES, AND USE THEREOF

摘要

The present invention provides non-aqueous coating material compositions comprising A) at least one polyhydroxyl-group-containing compound, B1) at least one polyisocyanate-group-containing compound (B1) having free or blocked isocyanate groups and having a cycloaliphatic polyisocyanate parent structure, and/or a polyisocyanate derived therefrom, B2) at least one polyisocyanate-group-containing compound (B2) having free or blocked isocyanate groups and having an acyclic, aliphatic polyisocyanate parent structure, and/or a polyisocyanate derived therefrom, D) at least one catalyst for the crosslinking of silane groups, and R) at least one rheological assistant (R) based on fumed silica, where component (B1) and/or component (B2) comprise at least one structural unit (I) and/or at least one structural unit (II), the compound (B1) is used in an amount such that the binder fraction of the isocyanate-group-containing parent structure of (B1) is between 5% and 45% by weight, based in each case on the sum of the binder fraction of the isocyanate-group-containing parent structure of (B1) plus (B2), and the mixture of components (B1) plus (B2) includes structural units (I) and structural units (II). The present invention further provides multi-stage coating processes and also the use of the coating material compositions.