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试验合成了一种水性环氧乳化型固化剂(AEEC),该固化剂是既亲水又亲油的两亲性化合物,除具有与环氧树脂(EP)的环氧基起交联反应的固化性能外,对液体EP具有良好的乳化能力。将AEEC与EP以适当比例混合,不加其它乳化剂,通过相反转法制备出稳定的EP水乳液。试验结果表明:在EP/AEEC固化剂/水三元体系中,当w(水)=30%~40%时,可以完成相反转过程;通过相反转法配制的乳液,乳液粒径小(1μm左右),粒径分布较窄,乳液稳定性良好;当固化剂成盐率为50%~60%时,乳液经离心(3 000 r/min)分离30 min不分层,固含量为10%的乳液室温静置一周不分层。
An aqueous epoxy emulsion curing agent (AEEC) was synthesized and tested. The curing agent is an amphipathic compound that is both hydrophilic and lipophilic. In addition to having a crosslinking reaction with the epoxy groups of the epoxy resin (EP) Curing properties, the liquid EP has a good emulsifying capacity. AEEC and EP were mixed in appropriate proportions, without adding other emulsifiers, by phase inversion method to prepare a stable aqueous emulsion of EP. The experimental results show that the phase reversal process can be completed when w (water) = 30% ~ 40% in the EP / AEEC curing agent / water ternary system. The emulsion prepared by the phase inversion method has the advantages of small particle size ), The particle size distribution is narrower and the stability of the emulsion is good. When the rate of salt formation of the curing agent is 50% ~ 60%, the emulsion is centrifuged (3000 r / min) for 30 min and the emulsion content is 10% The emulsion is left standing for one week at room temperature without delamination.