K-KAT 348

K-KAT 348 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.

ADVANTAGES:
Can be used in ambient, force dry and bake systems
Excellent gloss retention
Excellent exterior durability
Good catalysis of secondary hydroxyls
 

TYPICAL PROPERTIES:
Appearance:                                    Clear, straw liquid
% Active (as metal carboxylate):     75
% Metal:                                           25
Specific gravity, 25°C:                     1.24 g/ml
 

SOLUBILITY:
K-KAT 348 is soluble in aromatics, aliphatics and glycol ethers. It has limited solubility in esters and alcohols. K-KAT 348 is insoluble in water.
 

APPLICATIONS:
K-KAT 348 is recommended for 2K and blocked isocyanate coatings. K-KAT 348 can replace many heavy metal and/or toxic catalysts used in the production of urethane elastomers, foams and coatings. K-KAT 348 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 348 as supplied by weight on resin solids should be used with blocked isocyanates while 0.03 - 0.1% is recommended for 2K coatings.