Hochtemperaturbeständige Folien auf Cellulosetriacetat-Basis

摘要

The invention relates to coating compositions, especially for cellulose triacetate films. The inventive coating compositions contain polycondensates of at least two hydrolyzable alkoxy compounds of the elements Si, Ti, Al and/or Zr. At least one of the hydrolyzable compounds contains at least one non-hydrolyzable group and the molar ratio of the hydrolyzable groups to the non-hydrolyzable groups ranges between 100:1 and 10:1. The metal oxide-based coatings obtained by the sol-gel method starting from these compositions impart a high thermal resistance to the cellulose triacetate films coated therewith, which are therefore especially useful as separating coats in the production of base materials for printed circuits and for other lamination processes that are performed at high temperatures.