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K-FLEX UD-320

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K-FLEX UD-320 is a high solids, aliphatic, low molecular weight urethane diol oligomer. It is soluble in polar organic solvents and has broad compatibility with acrylic, polyester, and alkyd resins. K-FLEX UD-320 will increase the hardness of a melamine crosslinked system. When used to modify a 2-component polyurethane, it will increase hardness and flexibility. K-FLEX UD-320 responds best to a zirconium chelate catalyst when used in isocyanate crosslinked systems.



ADVANTAGES:
Low VOC
Increased Hardness
Good Chemical Resistance
Good Exterior Durability
Excellent Hydrolytic Stability
Good QUV Resistance
Urethane Functionality without Isocyanates
 



TYPICAL PROPERTIES:
Appearance:                            Clear, straw viscous liquid 
% Active:                                  82
Viscosity, cPs, 50°C:                7,000
Hydroxyl number:                     300
Hydroxl equiv. weight:              188
Weight per gallon, 25°C:           9.4 lbs.    
Volatile:                                     PM acetate
 



SOLUBILITY:
Soluble in most organic solvents with the exception of aromatic and aliphatic hydrocarbons. Aromatic solubility can be achieved in combination with a hydrogen bonding solvent.
 



APPLICATIONS:
Machinery and Equipment Coatings
Appliance Coatings
Automotive Coatings
Paper Coatings
Wood Coatings
Aerospace Coatings
Automotive Repair
 



TYPICAL USAGE LEVELS:
Typically 5 -15% on total resin solids (TRS) for melamine baking systems or 5 - 10% on TRS for 2-component urethanes.

 
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