New Fluoropolymer Topcoat Standard for Protective and Restoration Coatings
Originally Presented: Wednesday, November 11, 2020
Since the 1980s, fluoropolymer resin technologies have offered the possibility of a quantum improvement in topcoat decorative properties- gloss and color retention- compared to conventional acrylic and polyester resins. Specifiers of both protective and architectural restoration coatings systems have expressed a need for an SSPC standard for field-applied fluoropolymer topcoats, particularly for bright and saturated colors. In the past few years, the SSPC C.1.8 committee has been working to develop such a standard, which is now in the final stages of balloting. A key challenge has been to identify a set of accelerated weathering test conditions which would allow for the reliable qualification of fluoropolymer topcoat formulations, much faster than the 10-50 year outdoor service life of the fluoropolymer paint. Using a round-robin weathering study of 13 resin systems (fluorinated and non-fluorinated) from 10 different manufacturers, in four reference colors, we have identified accelerated test conditions that accurately differentiate between high weatherability fluoropolymer formulations, and conventional SSPC Paint 36 and MPI 311 formulations (Spearman rank correlation > 0.90).
Dr. Kurt Wood is a Senior Principal
Scientist at Arkema, Inc., near Philadelphia,
Pennsylvania. He has worked in the polymers
and coatings area since 1989—first
with the Rohm and Haas Company—and with Arkema (formerly Atofina Chemicals) since 1996, where he is a group leader for KYNAR® PVDF coatings R&D. Areas of particular interest include waterborne coatings, crosslinking technologies, and weatherability prediction for coatings. He received a PhD in physical chemistry from the University of California at Berkeley.
A world-class producer of specialty materials including acrylic monomers, adhesives, emulsion systems, fluorochemicals, fluoropolymers, functional additives, hydrogen peroxide, PMMA, specialty polyamides, and thiochemicals