Catalysts (contd)
Bismuth-based catalysts used to catalyze the OH-NCO reaction (mainly from the NCO side)
- Used to reduce water-NCO reaction effects
- Results: broader molecular weight dispersion and higher viscosity
Amine catalysts used in foam formulations to catalyze the foaming reaction
- Polyether , a combination of amine and tin-catalyst
Catalysts have an effect on the final properties of the PU