K-KAT XC-B221 is a a Bismuth Carboxylate catalyst designed for 2K and 1K blocked isocyanate urethane coatings. It provides similar properties to standard tin catalysts without the environmental drawbacks.
| Metal Type | Bismuth carboxylate |
| % Active | 20 |
| Market Application | 1K blocked NCO, 2K PU, Foam |
| Application Advantage | Exterior durability, Tin-free |
| Formulation Advantage | 2-EHA free, Efficient |
| Product Group | Catalyst (tin-free) |
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