Control of Cure Time
Uncatalyzed systems typically need several hours to cure, and several days for max strength
Cures: MDI/BDO versus MBCA
- MDI/BDO has shorter “pot life”
- Needs faster blending equipment
- MDI/BDO goes through “cheesy state”
- Polymer can be handled, but has little strength
- MBCA rapidly increases in viscosity at the end of its pot life
Both systems can be accelerated