The lot analysis for a new batch of polyol indicates a OH Number of 54.2 and an acid number of 0.01. What is the polyol’s equivalent weight?
Equivalent Weight of a Polyol Blend: For foam systems based on a blend of polyols, the net equivalent weight can be calculated by using the result of Equation 6.4: where an acid number for the blend is calculated using the logic of Equation 6.4. Alternatively, the equivalent weight of a polyol blend is given by: Equivalent Weight of an Isocyanate: The weight of an isocyanate compound per isocyanate site. This is calculated from the analyzed isocyanate (NCO) content. where 42 is the atomic weight of the NCO group.