MULTILAYER RADIATION-CURABLE COATING FOR INDOOR AND OUTDOOR APPLICATION

摘要

The invention relates to a process for coating of a substrate, comprising: (a) applying a first layer of a liquid solvent-free UV-curable primer coating composition to a surface of the substrate; (b) curing the first layer by irradiation with UV light; (c) optionally applying and curing one or more further layers of a liquid solvent-free UV-curable coating composition on the cured first layer; (d) providing a granular material, having an average particle size in the range of 60 - 600 μm, to the coating; (e) applying a final layer of a liquid solvent-free UV-curable finisher coating composition on top of the cured first or further layer; and (f) curing the final layer by irradiation with UV light, Herein, the coating compositions comprise 20 - 90 wt% UV-curable resin, 5 - 70 wt% filler, 0.1 - 10 wt% photoinitiator and less than 5 wt% solvent, based on total weight of the coating compositions, and the UV-curable resin comprised in the finisher coating composition is a UV-curable acrylate resin. The invention further relates to coating compositions to be used in said process, a kit of parts comprising such coating compositions and the substrates coated according to the process according to the invention.