How to Choose Chemi Tech Defoamers for Water-Based Metallic Paints

In the formulation of water-based metallic paints, defoamer selection critically impacts coating appearance and application performance. Incompatible defoamers may cause bubbles, craters, or fisheyes. Chemi Tech’s defoamers, designed specifically for metallic systems, feature optimized molecular structures to eliminate foam during production and application without disrupting other components.  

1. Challenges in Defoaming Metallic Paints  

High viscosity and complex surface tension in water-based metallic paints (due to metal pigments and emulsions) make conventional defoamers prone to poor dispersion. Chemi Tech defoamers penetrate bubble walls rapidly while preserving pigment orientation.  

2. Advantages of Chemi Tech Defoamers  

- Fast action: Effective under high-speed mixing and spraying;  

- Long-term stability: No separation during storage;  

- Broad compatibility: Suitable for acrylic, epoxy ester, and other resin systems.  

3. Application Tips  

Add defoamers in two stages: 50%-60% during grinding, and the remainder during dilution. Post-addition, moderate stirring ensures homogeneity without excessive shear-induced re-foaming.  

By adopting Chemi Tech defoamers, manufacturers can enhance leveling and yield of water-based metallic paints, reducing rework costs caused by foam defects.