Influence of construction environment on resin curing
The construction environment has a great influence on the curing of resin. The higher the ambient temperature, the shorter the gelation and curing time.Sometimes the construction temperature 10 ℃, can make the gel time shorten nearly 1/2.If the construction environment temperature is too low, easy to cause permanent under-curing.Although the resin can be gelatinized at low temperature, the macromolecules formed after gelatinization cannot move. Because there is not enough exothermic peak temperature to trigger the constant release of free radicals by the curing agent, the chain cross-linking reaction is not easy to carry out and eventually leads to the permanent under-curing.
General requirements construction temperature is not lower than 15 ℃, relative humidity is not greater than 80%.
Generally in order to make the resin fully curing, curing molding after the best high temperature curing treatment.
After curing processing method: available in 2 hours under 40 ℃, 60 ℃ under 2 hours, 4 hours under 80 ℃, (if there are conditions can be in 100-120 ℃ with better effect to 2 hours) and then put into use after 24 hours at room temperature curing.If the construction unit does not have heat treatment conditions, it can be maintained at room temperature for 1 month after the construction (the maintenance time should be appropriately extended when the ambient temperature is low) to make it fully solidified before putting it into use.This is particularly important for curing resins for corrosion resistance purposes.
QuanZhou Neweco High Polymer Material Co.,Ltd.
Neweco is one of the leading unsaturated polyester resin manufacturers and suppliers,widely used in automobiles, ships, rail transit, wind power generation, pipe cans, heat and corrosion protection, building materials, stone repair, sanitary ware, artificial stone and other industries. Suitable for hand lay-up, spray, pultrusion, winding, molding, vacuum introduction / RTM, casting and other molding processes. Neweco Resin is committed to excellence and focuses on the application of composite materials to provide customers with comprehensive solutions.