Bubble Formation in Thick-Film Coatings: Chemi Tech's Expert Solutions

Thick-film coatings are widely used in industrial painting but often suffer from bubble defects, compromising appearance and corrosion resistance. Chemi Tech delivers scientifically-proven solutions based on decades of R&D.  

Root Causes of Bubbling  

1. Air Entrapment:High viscosity coatings are prone to carry bubbles during mixing, and the bubbles are not easily broken;

2. Chemical Reactions: CO₂ release from curing agents/resin reactions;  

3. Porous Substrates: Air escape from wood or concrete surfaces. 

Chemi Tech's Solutions

1. Specialized Defoamers:  

- KM-360 High-Efficiency Defoamer: Hydrophobic silica technology eliminates micron-sized bubbles instantly;  

- KM-380 Long-Term Anti-Foamer: Inhibits secondary foaming during the curing stage and is suitable for systems such as acrylic acid and epoxy.  

2. Process Optimization:  

- Use low-speed mixing (<500rpm) to minimize air intake;  

- Allow 15-minute bubble escape interval between layers.

-Add appropriate defoamer to quickly eliminate hidden foam in thick paste paint.  

Case Study  

A wind turbine blade manufacturer achieved 92% fewer bubble defects and 30% higher salt-spray resistance with KM-360.  

Chemi Tech offers free technical consultation and sample testing. Download whitepapers for in-depth data at our official website.