Solving Foam Issues with Optimal Defoamers Selection

Foam in coatings and inks leads to longer production time, craters on dried film... so you use defoamers. Be wise and avoid all the well-know undesired side-effects associated to this practice: adhesion, colorant rub-up…Join this course and you will:

1. Better prevent & troubleshoot foaming by identifying what is promoting foam stabilization: Gibbs effect, surface viscosity, cohesive strength...
2. Screen defoamers more efficiently with fast & easy tests to simulate foam generation during manufacturing, filling, application... for paints, inks, adhesives and construction products
3. Optimize benefits delivered by your defoamers: avoid overdosage, loss of efficiency, film defects... You will end up with simpler and cheaper formulations!

1. Introduction


2. Foam stabilisation

   • Role of Surfactants

   • Contribution effects

     • Marangoni-Gibbs Effect

     • Cohesive strength

     • Stabilization Effects



3. Composition and Mode of Action of Defoamers

   • Chemistry & Mode of action

   • Combatting microfoam

   • Defoamers for Water and Solvent based  applications



4. Test Methods & Defoamers selection process
   • Defoamer selection process
   • Test methods for paints, inks, adhesives and construction products


5. Selection Guidelines
   • Compatibility vs Effectiveness
   • How to avoid side-effects


6. Practical examples of the proper usage of defoamers and linking screening tests to real applications.