The Waterborne Symposium 2025

Bio: Brian Vest, Linda Adamson, Celine Burel

Abstract
"Perfluoro and Polyfluorinated-Alkyl Substances (PFAS) have been extensively utilized across various industries due to their exceptional ability to resist heat, oil, grease, and water. Among these PFAS chemicals, Fluorocarbon Surfactants (FCS) have been particularly effective in waterborne coatings to enhance early ""hot block"" resistance. However, increasing regulatory pressures and risk management considerations are pushing formulators to phase out these substances. This shift necessitates a careful balance between maintaining performance and adopting more sustainable alternatives.

Our study focuses on the development and application of novel phosphate ester wetting agents that offer improved early hot block resistance without the environmental drawbacks associated with fluorocarbon chemistry. These innovative additives are APE-free and have very low or zero VOC content, contributing to better colloidal stability. This stability enhances the wetting, dispersing, and compatibility properties of the final water-based coating. Our data will demonstrate the overall performance of the paint and explore the structure/property relationships that contribute to enhanced anti-blocking performance."

Abstract

Dirt pick-up resistance (DPUR) is a critical property in surface coatings, particularly for outdoor applications. Additives play a crucial role in enhancing DPUR by improving both the visual appearance and durability of coated surfaces. Silicone-based compounds, hydrophobic agents, and nanoparticles have been shown to reduce surface energy, thereby minimizing the adhesion of dirt particles and dirt slurries. In addition, certain polymeric and film-forming additives can improve surface smoothness and reduce porosity, further preventing dirt accumulation. The incorporation of photocatalytic additives has also been explored, leveraging their self-cleaning properties under sunlight exposure. This paper reviews the different types of additives used to enhance DPUR, their mechanisms of action, and their effectiveness with various methods. The optimization of additive in the formulations is key to achieving a balance between surface protection, durability, and environmental considerations, making them necessary in modern surface coating technologies.

Abstract

The increasing demand for sustainable solutions in coatings has prompted the development of innovative renewable defoamer technologies. This presentation explores the formulation of a cutting-edge defoamer derived from bio-based resources, focusing on its physical and chemical attributes that optimize defoaming effectiveness without compromise in wetting. The new defoamer achieves significant regulatory compliance and boasts a renewable bio-based content exceeding 75% while being mineral oil- and siloxane-free. This development redefines performance standards for renewable defoamers.