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Jocelyn Gruver - Waterborne Primers: Providing the Base for Exceptional Topcoat Performance

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Jocelyn Gruver - Waterborne Primers: Providing the Base for Exceptional Topcoat Performance

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Jocelyn Gruver
Associate Technical Service Manager
The Dow Chemical Company
Phone: 610-244-6334
Website: www.dow.com
Co-Authors: Paul Doll

 


Abstract

Primers are preparatory coatings that are applied to substrates in order to enhance the top coatings ability to beautify, through stain blocking and hiding, and protect with increased durability extending the life of the topcoat. A requirement for primer coatings is that they must be able to be applied to a variety of different substrates such as wood, metal, or alkyd, each bringing different challenges to the primer. Historically, the majority of primers have been solvent-based, as this technology outperforms waterborne primers for stain blocking, a critical performance requirement for these coatings. The interaction of typical problematic stains and solvent-based primers allow the stain blocking mechanism to block stains at the substrate/primer interface. While solvent-based primers have shown excellent performance, their high VOC and odors have caused a recent push to move to waterborne primer technology. Waterborne primers are still capable of minimizing stains from bleeding through the topcoat, however the mechanism is different as these primers are stain locking. The different stain blocking and locking mechanisms will be presented in depth. Additionally, primer formulation challenges across the many varied substrates, including composites in today’s market, and potential solutions will be discussed. Data will be presented from lab testing and real world exposures on various substrates that clearly convey the benefits to using a primer/topcoat system. 

 

Biography

Jocelyn (Josie) Gruver received a Ph.D. and M.S. in Chemistry from Cornell University, Ithaca, NY and a B.S. degree in Chemistry from Saint Mary’s College, Notre Dame, IN. She joined The Dow Chemical Company in 2010 and has since spent time in both Architectural and Industrial Coatings. The first few years were focused on R&D, primarily concentrated on emulsion polymer synthesis for industrial coatings. Josie holds several patents from her work in Industrial Coatings. In 2013, Josie transferred to the Coatings Technical Service Department and has focused on supporting new binder technology for the interior and exterior marketplace.  Josie’s first role in the Technical Service Department was in Architectural Wall and Masonry Binders group. Currently, Josie is an Associate Technical Service Manager in the Specialty Binder group.

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