A new lot of toluene diisocyanate is analyzed at 48.2% NCO. What is the equivalent weight?
Equivalent Weight of an Isocyanate Blend: For foam systems using a blend of different isocyanates, the net equivalent weight of the blend is given by: Equivalent Weight of Water: Water reacts with 2 isocyanate groups and thus the equivalent weight is given by: Isocyanate Index: The ratio of the equivalent amount of isocyanate used relative to the theoretical equivalent amount times 100. Theoretical equivalent amount is equal to one equivalent isocyanate per one equivalent B-side compounds; this is an index of 100.
