Patent ID: 9507320
Filing Date: 2016-11-29
CPC Classification: B44C,C03C,C04B,G03H

Claim Text:
1. A method for transferring a surface texture comprising a highly refractive optical microstructure to a substrate having a glass surface, a ceramic surface, or a metal surface, the method comprising the following process steps: a) applying a flexible covercoat onto a carrier sheet as a release coating; b) applying a stamping sol to the flexible covercoat and giving the surface texture to the stamping sol; and said stamping sol is an organically modified inorganic polycondensate or precursors thereof; c) making a stack on the substrate, the stack comprising an inorganic bonding agent coating and the surface texture, the bonding agent and the optical microstructure having a difference in refractive index, wherein the bonding agent coating is applied directly to the surface texture and the stack is then transferred to the substrate; d) removing the carrier sheet; and e) thermally treating the stack on the substrate without the carrier sheet, wherein as transfer of the optical microstructure to the substrate takes place, the substrate has a temperature treatment comprising the steps of heating the substrate for 8 hours at 80° C. and within 4 hours raising the temperature to 450° C.; holding the temperature at 450° C. for 1 hour, then cooling workpiece within 4 hours to 20° C.; wherein the bonding agent coating comprises a nanocomposite which can be obtained by modifying a surface of a) colloidal inorganic particles with b) at least one silane of the general formula under conditions of a sol-gel process with an under-stoichiometric amount of water, based on the radical A, with formation of a nanocomposite sol, and further hydrolysis and condensation of the nanocomposite sol.