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How can I remove foam and improve the aesthetics of my urethane/acrylic water-based wood coating?

Jeanine Snyder
Senior Development Chemist 

The application of water-borne coatings on difficult-to-coat substrates such as wood, plastics, films and poorly prepared metal surfaces presents significant challenges to the coatings formulator. To maximize wetting and minimize defects like craters, fisheyes, orange peel and pinholes, the proper surfactant is needed, not only to promote substrate wetting but also to minimize foam generation. Dynol™ 800 surfactant has been developed to meet the growing need for high performance surfactants. Dynol 800 surfactant provides a superior balance of properties compared to traditional fluorosurfactants and silicone surfactants, with exceptional performance in wood and plastic coatings as well as a wide variety of other water-based coating applications. Based on Gemini technology, Dynol 800 surfactant has the ability to reduce both equilibrium and dynamic surface tension to levels not achieved with other surfactants. In a three-coat brush application of a model urethane-acrylic hybrid interior wood coating, Dynol 800 surfactant is the formulator’s choice for improved wetting, superior flow and leveling, and foam control compared to coatings containing silicone surfactants.
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