| 摘要 |
The present invention concerns non-aqueous coating material compositions comprising at least one polyhydroxyl group-containing component, at least one polyisocyanate group-containing component, at least one catalyst and at least one urethane additive (PF) which has at least one perfluoroalkyl group of the formula (I) CR1 3-(CR2 2)X- where R1 and R2 independently of one another are H, F and/or CF3, but R1 and R2 cannot simultaneously be H, and x = 1 to 20, and has at least one silane group of the formula (II) -X-Si-R3 sG3-s where G = hydrolysable group, X = organic radical, R3 = alkyl, cycloalkyl, aryl or aralkyl and s = 0 to 2, characterized in that the urethane additive (PF) has been prepared by reaction of 0.5 to 20 mol% of the isocyanate groups originally present in a polyisocyanate (PI) with a component (Ia) which has at least one perfluoroalkyl group of the formula (I) and a group which is reactive towards isocyanate groups, and up to 99.5 mol% of the isocyanate groups originally present in the polyisocyanate (PI) with a component (IIa) which has at least one silane group of the formula (II) and a group which is reactive towards isocyanate groups. Also subjects of the present invention are the coatings produced from these coating material compositions, and their use. |
