What: FREE Webinar
Where: Online
When: On Demand until September 15, 2018
Formaldehyde-Free Polymer Microspheres and their Application Potential in Coatings
Polymer microspheres filled with actives (corrosion inhibitors, self-healing agents, fragrance oil, etc.) are used to increase coating functionality. Formaldehyde-based binders, melamine formaldehyde (MF) and urea formaldehyde (UF), have produced successful microspheres because the chemical reaction is highly tailorable to achieve desired microsphere properties. Safety and environmental concerns around formaldehyde exposure have created a need for formaldehyde-free polymer microspheres. Polyurethane (PU) urea is the closest current alternative to formaldehyde-free microspheres. The use of polymer microspheres beyond MF, UF and PU urea is limited. Polyacrylate microspheres are added to coating formulations to improve performance, but not as a microcapsule for controlled active release. This is because polyacrylates do not have adequate desired performance attributes owing to limited crosslinking chemistries. This presentation will highlight Battelle’s polyacrylate microcapsule synthesis, the encapsulation process, the structure activity relationship between the polymer and microcapsule performance, and examples of encapsulated liquid and solid actives.
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