Abstract: A new polyaspartic ester was prepared by two-]step process: (1) Michael addition reaction between isophorone diamine(IPDA) and dialkyl maleates; (2)reaction of the addition reaction product of step(1 )with epoxidized soybean oil( ESO) at the presence of catalyst. Compare to the one-step process the two-step process might significantly shorten the reaction time, meanwhile, ESO modified PAE effectively improved the performance of PAE.The effects of reaction temperature, catalyst and Eso dosage on ESO modified PAE were studied.FT-IR and TG were employed to characterize the prepared polyas ester. The results showed that the two-step process shortened significantly the reaction time. moreover, ESO could enable the pae to fom crosslinking network structure, which obviously improved the thermal stability of the PAE.

Key words: polyaspartic, polyurea, epoxidized soybean oil

摘要： 采用二步法：（1）异佛尔酮二胺（IPDA）与马来酸二乙酯反应得到 Michael 加成产物；（2）往反应（1）产物中加入环氧大豆油（ESO），经催化合成改性聚天冬氨酸酯（PAE）。 采用二步法引入ESO 改性 ＰＡＥ，能缩短合成反应时间，同时能引入 ESO 的优点改善 ＰＡＥ 的不足。 研究了反应温度、催化剂和 ESO 用量等因素对改性反应的影响。 采用 FT-IR 和 TG 等手段表征 PAE。 研究结果表明：二步法缩短了 PAE 反应时间， ESO 改性 PAE 形成交联网络结构，改善了PAE 热稳定性。

关键词: 聚天冬氨酸酯, 聚脲, 环氧大豆油