How to solve the problem of crystallization of epoxy resin in winter

The formation of epoxy crystallization
under normal temperature conditions, liquid BPA type A epoxy resin solidification point / melting point temperature is 45-50 degrees C, should be solid, but it belongs to the cold liquid, not easy to form crystal species, so the liquid. When the external temperature decreases, the molecular chain activity decreases, making it easy to produce crystals, slowly making epoxy resin complete phase transition, that is, the transition from liquid to solid state. Generally speaking, in the temperature range of zero to fifteen degrees is more prone to crystallization, crystallization of the resin transparency will see free-floating grains or groups of crystals, poor transparency will become as cloudy as honey .
the reasons for crystallization
epoxy resin itself is high purity, low viscosity, impurities, low external ambient temperature, hot and cold alternate, are prone to crystallization phenomenon.
to solve the crystallization problem
because crystallization will cause greater trouble, so it is necessary to solve the crystallization problem, it is recommended that the following methods:
1, control the epoxy resin storage ambient temperature.
2, crystallization epoxy resin can be heated and stirred to restore it by 50-60 degrees C.
3, the addition of BPA F epoxy resin will effectively reduce the production of crystalline image, will not affect performance, and BPA F epoxy resin is better than BPA type A epoxy resin, but BPA F epoxy resin price is slightly more expensive, such as: NPEF-170.
4, the use of low crystallization or non-crystalline BIS A epoxy resin, the disadvantage is slightly higher viscosity, such as: NPEL-128R, NPEL-128S.