High performance coatings for building panels
The present invention is directed to dirt and anti-microbial resistant articles that include a substrate, a powder coating applied to the substrate, the powder coating may include a cross-linked polymeric binder. The powder coating may include a blend of metal borate and a sulfur-containing benzimidazole compound, wherein the metal borate and sulfur-containing benzimidazole compound are present in a weight ratio ranging from about 75:1 to about 10:1. The powder coating may include fluorosurfactant and a fluorosurfactant may be applied to the powder coating in an amount ranging from about 0.01 g/m 2 to about 4 g/m 2 . The powder coating may be formed using a liquid-based fluorosurfactant.
1. An article comprising:
a substrate;
a powder coating having an upper surface opposite a lower surface, the lower surface facing the substrate; and
wherein the powder coating is formed from a precursor comprising a blend of polymeric binder, cross-linker, and fluorosurfactant composition comprising anionic fluorosurfactant, and water; wherein the polymeric binder is substantially free of PVDF polymer; and
wherein the anionic fluorosurfactant is present in an amount ranging from about 13% to 15% based on the total weight of the precursor composition.
2. The article of claim 1 , wherein the powder coating has a thickness ranging from about 50 μm to about 120 μm.
3. The article according to claim 1 , wherein the anionic fluorosurfactant is present in amount ranging from about 0.05 wt. % to about 4.0 wt. % based on the total weight of the powder coating.
4. The article according to claim 3 , wherein powder coating further comprises a pigment, and wherein fluorosurfactant is present in an amount ranging from about 10 wt. % to about 25 wt. % based on the total weight of the pigment.
5. The article according to claim 1 , wherein the fluorosurfactant has a melting temperature ranging from about 50° C. to about 70° C.