K-FLEX 171-90 is a chain extended version of K-FLEX 188. Although it is slower reacting in isocyanate crosslinked systems than K-FLEX 188, it offers longer pot life, improved adhesion and flexibility. Because of its lower hydroxyl number, K-FLEX 171-90 requires less crosslinker. K-FLEX 171-90 can also be used as a modifier of aminoplast crosslinked coatings, inks and adhesives to improve flexibility and adhesion.
Low Isocyanate Demand
Appearance: Clear to hazy straw liquid
% Active: 90
Viscosity, cPs, 25°C: 3,700
Hydroxyl number: 122
Hydroxyl equiv. weight: 460
Weight per gallon, 22°C: 9.2 lbs.
Volatile: Butyl acetate/ xylene
2K Urethane Coatings
Office Furniture Coatings
Soluble in alcohols, esters, ketones, xylene, Aromatic 100 and Aromatic 150. Partially soluble in mineral spirits. Insoluble in water.
TYPICAL USAGE LEVELS:
Typically 5-10% on total resin solids (TRS) for melamine baking systems or 5-25% on TRS for 2-component urethanes.