Multilayer coating with digital printing
A multilayer coating system for metal substrates is described. The coating system includes a digital printed coating layer applied to the substrate and a clear coating layer applied over the digital printed coating layer. The digital printed coating layer is applied using a jet process and the inks used are inorganic inks. The described multilayer coating system demonstrates a color change (ΔE) of no more than 5 units.
1 . A multi-layer weatherable coating system comprising:
a basecoat layer comprising at least one polyester resin component applied on a planar metal surface that forms at least part of a garage door;
a patterned coating comprising an ink composition deposited over the basecoat layer on the planar metal surface, wherein the ink composition comprises a 100% solids inorganic ink system; and
an electron beam-cured clear coating layer comprising 20 to 40% by weight of a urethane (meth) acrylate resin component applied over the patterned coating,
wherein the electron beam-cured layer is applied in a coil coating process, the patterned coating is applied by a process integrated into the coil coating application process, and wherein the coating system demonstrates a color change (ΔE) of no more than 5 units on exposure to UV radiation of at least 500 hours.
2 . The coating system of claim 1 , wherein the ink composition includes a resin component.
3 . The coating system of claim 1 , wherein the ink composition includes a resin component comprising radiation-curable ethylenically unsaturated monomers or oligomers.
4 . The coating system of claim 1 , wherein the clear coating layer includes a resin component selected from fluoropolymer, polyester, silicon modified- polyester, or mixtures or combinations thereof.
5 . The coating system of claim 1 , wherein the clear coating layer includes a resin component and a reactive diluent.
6 . The coating system of claim 1 , wherein the clear coating layer has dry film thickness (DFT) of about 0.3 mil to 0.5 mil.
7 . The coating system of claim 1 , wherein the basecoat layer comprises at least one resin component.
8 . The coating system of claim 1 , wherein basecoat layer comprises at least one polyester resin component.
9 . The coating system of claim 1 , wherein the basecoat layer has a dry film thickness of about 0.6 mil to 0.7 mil.
10 . The coating system of claim 1 , wherein the clear coating layer has low viscosity.
11 . The coating system of claim 1 , wherein the clear coating layer is mar resistant.
12 . The coating system of claim 1 , wherein the clear coating layer demonstrates optimal adhesion to the patterned coating.