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K-KAT XK-640

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K-KAT XK-640 is a versatile bismuth carboxylate catalyst designed for blocked isocyanate and two component urethane coatings. It can provide similar properties to standard tin catalysts without the environmental drawbacks. K-KAT XK-640 is designed to provide improved hydrolytic stability compared to other bismuth carboxylate catalysts.



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



TYPICAL PROPERTIES:
Appearance:                                   Clear, amber liquid
% Metal:                                         18
Specific gravity, 25°C:                    1.12 g/ml
 



SOLUBILITY:
K-KAT XK-640 is soluble in aromatics, aliphatics and glycol ethers. It has limited solubility in esters and alcohols. K-KAT XK-640 is insoluble in water.
 



APPLICATIONS:
K-KAT XK-640 is recommended for 2K and blocked isocyanate coatings. K-KAT XK-640 can replace many heavy metal and/or toxic catalysts used in the production of urethane elastomers, foams and coatings.
 



TYPICAL USAGE LEVELS:
0.05 – 0.2% as supplied on total resin solids for 2-component polyurethane systems.
1.0 – 2.5% as supplied on total resin solids for blocked isocyanate systems. 

 
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