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Article: New waterborne epoxy resin dispersion: for low-VOC, 2K high-performance metal primers without anti-corrosion pigments.
- Article from:
- Paint & Coatings Industry
- Article date:
- August 1, 2009
- Author:
CopyrightCOPYRIGHT 2009 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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[ILLUSTRATION OMITTED]
Solventborne, 2-pack (2K) epoxy-amine coating systems have been commonly used to formulate high-performance metal primers. Crosslinkable at ambient temperatures, they provide excellent adhesion as well as corrosion protection to many metallic substrates. However, due to new, lowered VOC limits enacted in certain areas as well as other proposed regulation changes in North America and Europe, there is a need to reduce VOC by shifting to waterborne 2K epoxy systems.
Unfortunately, existing waterborne 2K epoxy primers are generally regarded as inferior in terms of corrosion and humidity resistance, when compared to their solventborne ...