摘要： 【目的】制备强防腐性能及刚韧兼备的快干型聚酰胺水性环氧固化剂。【方法】选用马来酸酐（ MA）和 4，4'-二氨基二环己基甲烷（ H₁₂MDA）为原料，通过迈克尔加成反应一步合成含有 3个端胺基的聚酰胺中间体（ JXA-4D）再以 JXA-4D、复合多元胺、环氧树脂（ NPEL-128）和聚乙二醇二缩水甘油醚（ PEGDGE）合成聚酰胺水性环氧固化，剂（ MK-165），最后对 MK-165综合性能进行了分析。【结果】酸值、 FT-IR结果表明， JXA-4D、 MK-165成功合成；所制备的 JXA-4D是一种含有 3个端胺基的短链高支化结构，其低黏度和高胺值的特性，显著提升了反应活性与交联密度；由 JXA-4D固化 NPEL-128制备的 MK-165，具备稳定的合成工艺且对多种环氧底漆展现出良好普适性；由其制备的水性环氧涂料，力学性能优异，硬度 3H，柔韧性 1 mm；固化速度快，在常温下实干时间为 4h，低温环境亦能固化；同时，拥有长效防腐性能，包括 720 h耐盐雾性和 960 h耐水性。【结论】将基于迈克尔加成法制备的聚酰胺固化剂应用在双组分涂料，能够在有效保持涂层柔韧性的同时，提升硬度和固化速度。这一结果为后续新型聚酰胺固化剂的研究与开发提供了有益的理论依据和研究基础。

关键词: 环氧固化剂, 迈克尔加成反应, 聚酰胺, 柔韧性, 耐介质性, 低温快干

Abstract: ［Objective］The objective of this study is to prepare a fast-drying，medium-resistant， and tough polyamide-based aqueous epoxy curing agent.［Methods］ A polyamide intermediate containing three terminal amine groups（JXA-4D） was first synthesized in one step via a Michael addition reaction using maleic anhydride（MA）and 4，4'-diaminodicyclohexylmethane（H₁₂MDA）as raw materials. Subsequently，the polyamide waterborne epoxy curing agent（MK-165）was synthesized from JXA-4D，a composite polyamine，epoxy resin（NPEL-128）， and polyethylene glycol diglycidyl ether（PEGDGE）. The thermal properties of MK-165 were then analyzed.［Results］The FT-IR results showed that JXA-4D and MK were successfully synthesized. The prepared JXA-4D exhibited a short-chain high-branched structure with three terminal amine groups. Its low viscosity and high amine valuesignificantly improved reactivity and crosslinking density. MK-165，synthesized from JXA-4D curedNPEL-128 had a stable synthesis process and showed good universality to a variety of epoxy primers.The two-component waterborne epoxy coating prepared with MK-165 exhibited excellent mechanicalproperties，with the cured film achieving both high hardness（3H）and good flexibility（1 mm bend test）. The curing speed was fast，the working time was 4 h at room temperature，while maintaining curability in low-temperature environments. Furthermore，the coating demonstrates long-lasting media resistance，including 720 hours of salt spray resistance and 960 hours of water resistance.［Conclusion］ A polyamide curing agent was successfully prepared based on the Michael addition method. Whenapplied in two-component coatings，the hardness and curing speed of the coatings were effectively maintained. These findings provided a useful theoretical basis and research foundation for the subsequent development of novel polyamide curing agents.

Key words: epoxy curing agent；Michael addition reaction；polyamide；flexibility；media resistance； , fast-curing at low temperatures 

中图分类号: 

• TQ630. 4