Ask Dr. Dave: Can you help us with a crystallization problem in the part-A (epoxy side) of our two-part epoxy putty compound?
Epoxies tend to crystallize when they are very pure with narrow molecular weight distributions.
Question: We have been making two-part epoxy putty compound in a northern climate, where it’s hot from April through mid-October and bitterly cold from October to February. Many times in the winter, we have had crystallization problem in part-A (epoxy side) of the sealant. We have studied a lot of literature and information on this but have not yet come up with a solution. We have considered mixing bis-A and bis-F resins. Can you help?