Change of properties of glue solution with time in storage
The curing agent reacts with the water and alcohols in the glue solution much faster than the addition reaction with the main agent, so the amount of curing agent is constantly decreasing on the time axis. In the preparation of adhesives, the amount of glue appropriate to reduce, with the use, do not place for too long. The shorter the time after dispensing the glue, the less the curing agent is consumed by the water, and the better to ensure the true proportion of the OCN and OH group after the glue coating drying; However, since the volatilization rate of water molecules is much slower than that of ethyl ester molecules, water molecules are more likely to remain when the drying capacity of the system is insufficient.
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