K-FLEX UD-350W is an aqueous solution of an aliphatic, low molecular weight urethane diol oligomer. It is recommended as a modifier for amino crosslinked water soluble and emulsified acrylic, alkyd, urethane and polyester resins. K-FLEX UD-350W can be used as a reactive cosolvent replacement to increase solids, crosslink density, improve film/resistance properties and flow/leveling.
Allows cosolvent reduction (lower-VOC)
Water soluble without using amine and cosolvent
Good chemical/stain resistance
Improved flow/leveling (higher gloss)
Good hydrolytic stability
Excellent QUV resistance and exterior durability
Appearance: Straw colored liquid
% Active: 88
Viscosity, cPs, 50°C: 3,000
Hydroxyl number: 325
Hydroxl equiv. weight: 170
Weight per gallon, 25°C: 9.4 lbs.
K-FLEX UD-350W is soluble in water and in all water miscible organic solvents. It is not soluble in aliphatic and aromatic hydrocarbons.
Emulsions or water-borne thermoset coatings crosslinked with aminoplasts:
TYPICAL USAGE LEVELS:
K-FLEX UD-320W should be used as a reactive resin modifier at 2-15% of total resin solids. At levels greater than 5% the aminoplast ratio should be increased.