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K-FLEX XM-359

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K-FLEX XM-359 is designed to provide long pot life in 2K polyurethanes and to prevent yellowing resulting from interaction with benzotriazole (BZT) UV absorbers in clearcoat systems. K-FLEX XM-359 is a saturated, aliphatic resin modifier. It provides a good balance of flexibility with hardness, excellent exterior durability plus excellent solubility in many different solvents including exempt solvents.



ADVANTAGES:
Optical Clarity/Low color
No yellowing from interaction with BZT UV Absorbers
Long pot life for 2-component polyurethane systems
Excellent compatibility and solubility (including exempt solvents)
Hardness with flexibility
 



TYPICAL PROPERTIES:
Appearance:                            Clear, light straw liquid
% Active:                                  100
Viscosity, cPs, 25°C:                9,800
Hydroxyl number:                     230 
Hydroxyl equiv. weight:            244                         
Weight per gallon, 22°C:          9.3 lbs.
 



SOLUBILITY:
Soluble in alcohols, esters, ketones, xylene, Aromatic 100, Aromatic 150, t-butyl acetate, Oxsol 100, propylene carbonate and dimethyl carbonate. Partially soluble in mineral spirits. Insoluble in water.
 



APPLICATIONS: 
Optical Clarity/Low color
No yellowing from interaction with BZT UV Absorbers
Long pot life for 2-component polyurethane systems
Excellent compatibility and solubility (including exempt solvents)
Hardness with flexibility
 



TYPICAL USAGE LEVELS:
Typically 5 -10% on total resin solids (TRS) for melamine baking systems or 5 - 25% on TRS for 2-component urethanes. 

 
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