Abstract
A novel, waterborne epoxy system comprised of non-ionic stabilized dispersions of a solid epoxy resin and an amine curing agent has been designed for ambient-cure coatings. The performance characteristics of coatings formulated from the new system have been compared to a standard system. The new system produced formulated coatings with robust performance over a wide range of amine-to-epoxy stoichiometries (65 to 130%). At 100% stoichiometry, the new system was found to have lower VOC, faster hardness development, better gloss, and higher impact resistance than the standard system. The new formulations also exhibited superior water and salt spray resistance, and a definitive viscosity rise at the end of potlife. Unlike the standard system, coating morphology of the new waterborne system was found to be similar to a solvent-based coating. For the new system, good coalescing solvents, as judged by gloss and gloss potlife, were found to have low solubility parameters and high boiling points.
Similar content being viewed by others
References
Roy, G.A.,Amer. Paint Coat. J., p. 53, February 8, 1993.
Galgoci, E.C., “Formulating Waterborne Epoxy Resin Coatings: Practical Considerations,” lecture presented in the short course Reformulating to Waterborne Coatings, held in conjunction with 21st Annual Waterborne, High-Solids, and Powder Coatings Symposium, New Orleans, LA, February 1994.
Galgoci, E.C., et al.Proc. 24th Annual Waterborne, High-Solids, and Powder Coatings Symposium, pp. 106–119, New Orleans, LA, 1997.
Walker, F.H. and Cook, M.I., inTechnology for Waterborne Coatings, Glass, J.E. (Ed.), ACS Symposium Series 663, American Chemical Society, pp. 71–93, Washington, D.C., 1997.
Galgoci, E.C. and Komar, P.C.,Proc. 25th Annual Waterborne, High-Solids, and Powder Coatings Symposium, pp. 344–357, New Orleans, LA, 1998.
Walker, F.H., Everett, K.A., and Kamat, S.,Proc. 22nd Annual Waterborne, High-Solids, and Powder Coatings Symposium, pp. 88–99, New Orelans, LA, 1995.
Shell Chemical Company Technical Bulletin Number SC:1892-4. “Starting Formulation No. 1810: EPI-REZ® 5522-WY-55 Resin/EPI-Cure® 8290-Y-60 Curing Agent White Enamel (Maximum Acid Resistance).” This formulation was modified by replacing the 2-propoxyethanol in the Part A with an equal volume of water.
Shell Chemical Company Technical Bulletin Number SC:1883-94. “Starting Formulation No. 1810: EPI-REZ® 5522-WY-55 Resin/EPI-Cure® 8290-Y-60 Curing Agent Waterborne Red Oxide Primer.”
Galgoci, E.C. and Komar, P.C.,Proc. 21st Annual Waterborne, High-Solids, and Powder Coatings Symposium, (Part 1), New Orleans, LA, pp. 54–64, New Orleans, LA, 1994.
Rynders, R.M., Hegedus, C.R., and Gilicinski, A.G., “Characterization of Particle Coalescence in Waterborne Coatings Using Atomic Force Microscopy,”Journal of Coatings Technology,67, No. 845, 59 (1995).
Galgoci, E.C. and Weinmann, D.J.,Proc. 22nd Annual Waterborne, High-Solids, and Powder Coatings Symposium, pp. 119–128, New Orleans, LA, 1995.
Galgoci, E.C. and Weinmann, D.J.,Proc. 4th Congresso Internacional de Tintas, Vol. I, 203–214, 1995.
Weinmann, D.J. and Smith, C., paper presented at the 23rd Annual Waterborne, High-Solids, and Powder Coatings Symposium, New Orleans, LA, 1996.
Arco Chemical Company Technical Bulletin, ACC PC02-9610-10M, “Winning Performance for the Coatings Industry.”
Hansen, C.M., “The Three-Dimensional Solubility Parameter—Key to Paint Component Affinities: I. Solvents, Plasticizers, Polymers, and Resins,”Journal of Paint Technology,39, No. 505, 104 (1967).
Author information
Authors and Affiliations
Additional information
P.O. Box 1380, Houston, TX 77251-1380.
Rights and permissions
About this article
Cite this article
Galgoci, E.C., Komar, P.C. & Elmore, J.D. High performance waterborne coatings based on dispersions of a solid epoxy resin and an amine-functional curing agent. Journal of Coatings Technology 71, 45–52 (1999). https://doi.org/10.1007/BF02697895
Issue Date:
DOI: https://doi.org/10.1007/BF02697895