K-KAT XC-B221

 

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K-KAT XC-B221 is an experimental bismuth carboxylate catalyst designed for blocked isocyanate and two component urethane coatings. It is a bismuth catalyst that can provide similar properties to standard tin catalysts without the environmental drawbacks.



ADVANTAGES:
Can be used in ambient, force dry and bake systems
Excellent gloss retention
Excellent exterior durability
 



TYPICAL PROPERTIES:
Appearance:                             Clear, straw liquid 
% Active (metal carboxylate):   100
% Metal:                                    20
Specific gravity, 25°C:               1.18 g/ml    
 



SOLUBILITY:
Soluble in methanol, ethanol, isopropanol, butanol, glycol ethers, glycol ether acetates, aromatic and aliphatic hydrocarbons. Insoluble in water.
 



APPLICATIONS:
K-KAT XC-B221 is recommended for 2K and blocked isocyanate coatings. K-KAT XC-B221 can replace many heavy metal and/or toxic catalysts used in the production of urethane elastomers, foams and coatings. K-KAT XC-B221 is especially effective in cationic electro-coatings based on blocked isocyanates.
 



TYPICAL USAGE LEVELS:
One component formulations based on blocked isocyanates generally require higher catalyst levels than 2-component (2K) systems. Levels of 0.5 -2.0% K-KAT XC-B221 as supplied by weight on resin solids should be used with blocked isocyanates while 0.03 - 0.1% is recommended for 2K coatings.

 
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