K-FLEX A308 is a low viscosity, 100% active, linear, saturated, aliphatic polyester diol with primary hydroxyl groups. This product was designed as a flexibility modifier for acrylic/isocyanate and acrylic/melamine systems. The low viscosity combined with higher hydroxyl number gives good hardness and adhesion while allowing lower VOC levels.
Good balance of surface dry/pot life in 2K PU
No acid functionality
Appearance: Clear liquid
% Active: 100
Viscosity, cPs, 25°C: 1,500
Hydroxyl number: 260
Hydroxyl equiv. weight: 216
Weight per gallon, 25°C : 9.2 lbs.
Soluble in alcohols, esters, ketones, xylene, Aromatic 100 and Aromatic 150. Partially soluble in mineral spirits. Insoluble in water.
TYPICAL USAGE LEVELS:
5-25% replacement of primary backbone resin