HIGH PERFORMANCE COATING
A coated article that demonstrates a sparkle effect and vibrant color over an expanded range of color space is described. A first coating of at least one fluoroolefin and at least one pigment is applied to a substrate, followed by a second coating of at least one fluoroolefin and at least one effect additive. The effect additive is glass flake designed to provide a sparkle effect. The cured film may be provided in a wide range of colors warrantied similar to conventional coatings. A method of making these coated articles is also provided.
1 . A coated article, comprising:
a substrate;
a first coating applied on the substrate, the first coating comprising a cured film formed from a first composition including at least a fluorinated resin; and
a second coating applied over the first coating, the second coating comprising a cured film formed from a second composition including at least a fluorinated resin and glass flakes,
wherein the second coating provides the coated article a sparkle finish.
2 . The coated article claim 1 , wherein the substrate is a metal substrate.
3 . The coated article of claim 1 , wherein the first coating composition and second coating composition are independently each a dispersion of a fluoroolefin in a solvent.
4 . The coated article of claim 1 , wherein the fluorinated resin is a polymer derived from vinylidene fluoride.
5 . The coated article of claim 1 , wherein the fluorinated resin is a polymer derived from fluoroethylene.
6 . The coated article of claim 1 , wherein the first coating composition and second coating composition are independently each selected from polyvinylidene fluoride (PVDF), fluoroethylene alkyl vinyl ether copolymer (FEVE), and mixtures thereof.
7 . The coated article of claim 1 , wherein the first coating composition and second coating composition independently each further comprise a resin component selected from (meth)acrylate-derived monomers, polyester, polyurethane, epoxy, or combinations thereof.
8 . The coated article of claim 1 , wherein the first composition further comprises about 0.1 to 0.5 wt % pigment, based on the total weight of the composition.
9 . The coated article of claim 1 , wherein the glass flakes are present in an amount of no more than about 1 wt %, based on the total weight of the composition.
10 . The coated article of claim 1 , wherein the glass flakes have a particle size (D50) of about 10 to 50 μm.
11 . A method of making a coated article with a sparkle finish, comprising:
providing a substrate;
applying on the substrate a first coating composition comprising at least a fluorinated resin;
applying on the substrate a second clear coating composition comprising at least a fluorinated resin and glass flakes; and
curing the first coating composition and second coating composition sequentially to form the coated article.
12 . The coated article of claim 1 , wherein the first coating composition comprises about 70 wt % fluorinated resin, about 30% of an additional resin component, based on the total weight of resin in the composition, and has a pigment-to-binder (P/B) ratio of 0.1 to 1.0.
13 . The coated article of claim 1 , wherein the first coating has a P/B ratio of about 0.5 to 0.6.
14 . The coated article of claim 1 , wherein the second coating composition comprises about 70 wt % fluorinated resin, about 30 wt % of an additional resin component, based on the total weight of resin in the composition, and less than about 1 wt % glass flakes.
15 . The coated article of claim 1 , wherein the article demonstrates L* values of 0 to 100.
16 . The coated article of claim 1 , wherein the article demonstrates a* values of −60 to 60.
17 . The coated article of claim 1 , wherein the article demonstrates b* values of −60 to 60.
18 . The coated article of claim 1 , wherein the coated article demonstrates a flop index of at least 10.
19 . The coated article of claim 1 , wherein the coated article demonstrates a flop index of at least 15.