Control of Cure Time (contd)

Catalysis necessary in MDI/BDO
- Dabco 33LV (Air Products & Chemicals, Inc.)
- Dibutyltin dilaurate
- Stannous octoate
Accelerate the rxn of isocyanate with hydroxyl without accelerating its rxn with water
- Bismuth catalysts
Demolding can be done in 1 min or less
Used in accelerated casting operations (open mold)
Reaction injection molding (RIM, closed mold)