High performance coatings for building panels
AssigneeArmstrong World Industries, Inc.
InventorsSteven L. Masia, Michelle X. Wang, Kenneth G. Caldwell
Life of this patent
Estimating the term…
Abstract
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 comprise a cross-linked polymeric binder. The powder coating may comprise 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 comprise fluorosurfactant and a fluorosurfactant may be applied to the powder coating in an amount ranging from about 0.01 g/m2 to about 4 g/m2. The powder coating may be formed using a liquid-based fluorosurfactant.
Claims23
-29. (canceled)
A method of forming a dirt repellant article comprising:
- a) blending a mixture comprising liquid carrier, an anionic fluorosurfactant, and a polymer binder;
- b) drying the mixture to form a powder coating precursor mixture that is substantially free of liquid carrier;
- c) applying the powder coating precursor mixture to a substrate;
- and
- d) curing the powder coating precursor mixture to form the dirt repellant article;
- wherein the blending of step a) is performed at a temperature below the melt temperature of the anionic surfactant and the polymeric binder.
A method of forming a dirt repellant article comprising:
- a) blending a mixture comprising liquid carrier, an anionic fluorosurfactant, and a polymer binder for a first time period followed by ceasing to blend the mixture for a second time period to complete a blend cycle;
- b) repeating the blend cycle;
- c) drying the mixture to form a powder coating precursor mixture that is substantially free of liquid carrier;
- wherein the ratio of the first time period to the second time period ranges from about 1:1 to about 1:20.
-92. (canceled)
An article comprising a powder coating applied to a substrate, the powder coating formed from a precursor comprising polymeric resin, cross-linker, and a blend of liquid carrier and fluorosurfactant.
(canceled)
Dependencies are inferred from the claim text.