Optimizing Wet-on-Wet Coating Process with 2K Epoxy Resin Systems: Techniques & Formulations

The "wet-on-wet" coating process involves applying a subsequent coat directly over the preceding layer before it has fully dried. This method is implemented to enhance production efficiency, reduce energy consumption, and strengthen inter-coat adhesion. Successful implementation requires coating compatibility, optimal application intervals, and controlled environmental conditions.

The two-component (2K) epoxy system combining WL-AD203 with curing agent WL-AC046 meets all wet-on-wet process requirements. This formulation exhibits:

lRapid drying characteristics

lSuperior application flowability

lExcellent thixotropic properties

lExtended effective open time

Notably, WL-AC046 curing agent features a comparatively low active hydrogen equivalent. This property significantly reduces the required curing agent dosage versus alternative systems, resulting in measurable cost savings while maintaining performance standards.

WL-AD203 waterborne 2K epoxy emulsion physical property

WL-AC046 Water based epoxy curing agent physical property

The active hydrogen equivalent of WL-AC046 is relatively low, and the overall cost of primer can be reduced by 20% compared with other similar products.

Surface drying can be achieved in 7-15 minutes above 5℃ and is suitable for "wet-on-wet" process

Salt spray resistance ≥ 500h

Pot-life at 35℃ > 5h

Comparison of anti-sagging performance with the same formula framework and viscosity