How to Select Defoamers for Water-Based Metallic Paints? Chemi Tech's Expert Guide

In the formulation of water-based metallic paints, defoamer selection critically impacts coating appearance and application performance. Incompatible defoamers may cause craters, fisheyes, or uneven gloss, potentially compromising corrosion resistance. Chemi Tech, a leader in surface treatment, offers tailored defoaming solutions through advanced technology.  

1. Mechanism of Defoamers  

Defoamers work by reducing surface tension to destabilize foam. Metallic paints containing metal flakes and emulsifiers require silicone- or mineral oil-based defoamers with fast bubble-breaking speed and high compatibility.  

2. Chemi Tech’s Key Advantages 

- Customized Formulations: Designed for aluminum/zinc pigments to prevent substrate reactions.  

- Low Foam Stabilization: Unique molecular structure minimizes post-application foam.  

- Eco-Compliance: Meets VOC regulations and industrial coating standards.  

3. Practical Recommendations 

- Testing Phase: Conduct dynamic stirring tests to evaluate defoaming efficiency.  

- Dosage Control: Typical range is 0.1%-0.5%; excess may impair film wetting.  

- Process Adaptation: Spray applications need foam-suppressing types, while roller coatings prioritize rapid bubble collapse.  

Chemi Tech’s defoamers enhance leveling and metallic effects in water-based paints. For technical details, visit our official website for professional support.