11.2 Novel Waterborne Epoxy Systems for Anticorrosive and 2K Zinc-Rich Primers
(Room 237-239)
10 Apr 18
2:30 PM
-
3:00 PM
Tracks:
Session 11: Epoxy Coatings, Session 11: Waterbased Coatings
In January 2015, China’s government implemented new regulations that limit the emission of volatile organic compounds (VOC) from the coating processes. Many industries are impacted including those that require heavy duty performance such as freight container, construction steel, and heavy machinery amongst others. Solutions being considered to address the low VOC challenge include the use of Waterborne coatings systems. Formulators face a number of challenges in converting solvent-borne formulations to waterborne formulations while retaining the performance characteristics of traditional systems. Many heavy duty Epoxy systems rely on three-layer systems; a Zinc (Zn) rich or an anticorrosive Epoxy primer, followed by an Epoxy mid-coat, followed by a top coat. Both primer options pose challenges for low VOC formulations. The inherent challenge of dispersing Zn in waterborne dispersions have made three-component (3K) systems a common solution. However, this has drawbacks such as ease of use in the field and consistent quality of the final product. Traditional anticorrosive waterborne primer systems use VOC in the form of co-solvents to enable required leveling for film formation, limiting the reduction in total VOC.
In this paper Olin Epoxy will present two low VOC waterborne Epoxy primer systems designed to enable solvent-borne performance for metal protection in both Zn rich 2K waterborne formulations and zero VOC anticorrosive Epoxy waterborne formulations, thus addressing the inherent challenges of traditional waterborne solutions. Comparative physical properties and performance benchmark data will be shared.