Soil and dirt repellent powder coatings
A dirt repellant panel coated with a powder coating composition that includes a polymeric binder and an anionic fluorosurfactant present in an amount ranging from about 0.1 wt. % to about 4 wt. %.
1. A powder coating composition comprising a blend of:
a polymeric resin;
a cross-linker for chemically reacting with the polymeric resin at a curing temperature;
a pigment; and
an anionic fluorosurfactant;
wherein the polymer resin is substantially free of fluoro-carbon groups.
2. The powder coating composition of claim 1 , wherein the blend is substantially free of solvent.
3. The powder coating composition of claim 1 , wherein the anionic fluorosurfactant is present in an amount ranging from 0.05 wt. % to 4 wt. % based on the total weight of the powder coating composition.
4. The powder coating composition of claim 1 , wherein the anionic fluorosurfactant comprises a phosphate group substituent.
5. The powder coating composition of claim 1 , wherein the anionic fluorosurfactant has a melting point ranging from 50° C. to 70° C.
6. The powder coating composition of claim 1 , wherein the anionic fluorosurfactant has a pH ranging from 1 to 6.
7. The powder coating composition of claim 1 , wherein the polymer resin has a glass transition temperature ranging from 45° C. to 90° C.
8. The powder coating composition of claim 1 , wherein the pigment is present in an amount ranging from 10 wt. % to 30 wt. % based on the total weight of the powder coating composition.
9. The powder coating composition of claim 1 , wherein the pigment is pretreated with the anionic fluorosurfactant.
10. The powder coating composition of claim 1 , wherein the anionic fluorosurfactant is present in an amount ranging from 10 wt. % to 25 wt. % based on the total weight of the pigment.
11. A powder coating composition comprising a blend of:
a polymeric resin;
a cross-linker; and
an anionic fluorosurfactant;
wherein the anionic fluorosurfactant comprises a phosphate group substituent.
12. The powder coating composition of claim 11 , wherein the polymer resin is substantially free of fluoro-carbon groups.
13. The powder coating composition of claim 11 , wherein the anionic fluorosurfactant is present in an amount ranging from 0.05 wt. % to 4 wt. % based on the total weight of the powder coating.
14. The powder coating composition of claim 11 , wherein the blend further comprises a pigment present in an amount ranging from 10 wt. % to 30 wt. % based on the total weight of the powder coating composition.
15. A powder coating composition comprising a blend of:
a polymeric resin;
a cross-linker; and
an anionic fluorosurfactant;
wherein the polymer resin is substantially free of fluoro-carbon groups.
16. The powder coating composition of claim 15 , wherein an anionic moiety of the anionic fluorosurfactant comprises at least one of a phosphate moiety, a sulfate moiety, a sulfonate moiety, or a carboxylate moiety.
17. The powder coating composition of claim 15 , wherein the anionic fluorosurfactant is present in an amount ranging from 0.05 wt. % to 4 wt. % based on the total weight of the powder coating.
18. The powder coating composition of claim 15 , wherein the anionic fluorosurfactant comprises a C1 to C16 perfluoroalkyl group.
19. The powder coating composition of claim 15 , wherein the polymer resin comprises at least one of polyester resin, polyurethane resin, epoxy resin, or polyester-urethane acrylate resin, and wherein the cross-linker comprises at least one of a hydroxyl group, a carboxylic acid group, an isocyanate group, or an epoxy group.
20. The powder coating composition of claim 15 , wherein the blend further comprises a pigment pretreated with the anionic fluorosurfactant.