Solving Foam Control Challenges in High-Build Coatings 

In coating applications, increased film thickness often raises defoaming difficulties. High viscosity or high-solid systems prolong bubble retention, making conventional defoamers ineffective. To address this, optimization in both defoamer selection and application techniques is critical.  

1. Key Criteria for Defoamer Selection  

Chemi Tech's defoamers for high-build coatings feature:  

- Rapid Penetration: Low surface tension components quickly rupture foam walls.  

- Long-Term Stability: Maintain activity in viscous systems without re-foaming.  

- Balanced Compatibility: Ensure defoaming efficiency without compromising gloss or adhesion.  

2. Application Best Practices  

- Phased Addition: Add 50% defoamer during grinding, with the remainder in let-down phase for uniform dispersion.  

- Stirring Control: Avoid high-speed stirring to minimize air entrapment; mid-low speed with defoamers is recommended.  

- Temperature Adjustment: Optimal activity for some defoamers occurs at 25-35℃, requiring environmental adaptation.  

Lab tests confirm these methods significantly reduce pinholes and craters in high-build coatings, suitable for industrial anti-corrosion or flooring applications. Small-scale trials are advised to determine optimal dosage based on specific formulations.