Synthesis and compound properties of epoxy resin fast curing agent at room temperature
Aiming at the problem that the room temperature drying time of the coating used with thick slurry epoxy resin and matching the thick-paste epoxy(HS)curing agent was too long(＞6 h),which does not meet the room temperature drying time of the high solid content ballast tank coating(≤4 h),phenol,paraformaldehyde,thiourea and triethylene tetramine were used as raw materials to synthesize and prepare a phenolic amine addition curing agent.The properties of the composite coating with phenolic amine addition curing agent and HS curing agent at the mass ratios of 1∶0.5,1∶1,1∶2,1∶3 and 1∶4 were studied.The results showed that the composite coating with phenolic amine addition curing agent and HS curing agent at a mass ratio of 1∶4 had the best performance.It could not only shorten the drying time of the coating to 3.5 h at room temperature,but also had excellent mechanical properties and weather resistance,which could meet the performance requirements of the current high solid content ballast tank coating.
epoxy resinphenolamineparaformaldehydecuring agentcoatingballast tankdrying time
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