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US 10,472,542 B2Granted
Polyurethane coatings for direct application to polyurethane pultrusion
AssigneeCovestro LLC
InventorsDavid P. Zielinski, Derick Henderson, Mark Conner
Life of this patent
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Abstract
The present invention provides a polyurethane coating composition comprising a fluorosurfactant, a silane adhesion promoter, and a silane modified polyisocyanate, wherein the composition has excellent substrate wet-out and adhesion under direct wet-on-hot and cold spray applications. The coating composition is particularly well suited to use with polyurethane pultrusion composites.
Claims6
A polyurethane pultrusion composite coated with a polyurethane coating composition comprising:
- a fluorosurfactant, a silane adhesion promoter, and a silane modified polyisocyanate, wherein the fluorosurfactant is selected from the group consisting of perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS), perfluorohexane sulfonic acid (PFHxS), perfluorononanoic acid (PFNA), or perfluorodecanoic acid (PFDA) and wherein the composition has excellent substrate wet-out and adhesion under direct wet-on-hot and cold spray applications.
Dependencies are inferred from the claim text.