High-viscosity waterborne coatings often face bubble defects during production or application, affecting surface quality. Chemi Tech specializes in defoamers and offers the following technical analysis and solutions.
Bubble Causes
1. High Viscosity: Thick coatings trap air bubbles, preventing natural escape.
2. Mechanical Shear: Mixing or pumping introduces air, forming stable foam.
3. Surfactant Residue: Wetting agents in formulations may stabilize foam.
Chemi Tech Defoamer Solutions
1. Fast Bubble Breaking: Unique molecular design rapidly disrupts foam surface tension.
2. Long-Term Foam Control: Prevents post-application re-foaming for smooth finishes.
3. Formula Compatibility: Optimized for thick coatings without affecting flow or gloss.
Application Tips
- Timing: Add during grinding phase for even dispersion.
- Dosage: Adjust between 0.1%-0.5% based on formulation tests.
Chemi Tech defoamers are lab-proven to reduce bubble defects in high-viscosity coatings, improving yield. Contact the technical team for customized solutions or samples.