摘要： 以异佛尔酮二异氰酸酯（IPDI）、聚酯多元醇 XCP-244 和丙烯酸异冰片酯（IBOA）为主要原料，采用共聚改性的方法制备了 IBOA 改性水性聚氨酯复合乳液（WPUA）。 研究了改性反应的工艺条件，并对复合乳液及胶膜的性能进行了分析讨论。 通过研究配方中的 R 值、DMPA 含量、 DEG 含量、中和度以及反应时间对复合乳液的黏度、稳定性以及胶膜的吸水率、拉伸强度的影响，确定了较适宜的改性工艺条件。 最终确定的 IBOA 改性水性聚氨酯的工艺条件为：R 值 180、DMPA 含量 5%、DEG 含量 0.75%、中和度 100%、反应时间 5h。并通过傅里叶红外光谱、差示扫描量热仪、拉伸测试仪等仪器对改性后的 WPUA 复合乳液及胶膜进行表征和分析。 结果表明，改性后的水性聚氨酯胶膜的耐热性、拉伸强度均有一定提高。

关键词: 丙烯酸异冰片酯, 水性聚氨酯, 共聚改性

Abstract: A composite emulsion of waterborne polyurethane modified by isobornyl acrylate (IBOA)was prepared by copolymerization of IPDI, XCP-244 and IBOA. Influence of R value, DMPA content, DEG content, neutralization degree and reaction time on the viscosity and stability of the composite emulsion, and on water absorption and tensile strength of the cured film was studied. Thus, the suitable modifying conditions of polyurethane modified by IBOA were determined as follows: R value 1.80, DMPA content 5%, DEG content 0.75%,neutralization degree 100%, and reaction time 5 h. Furthermore, the modified WPUA composite emulsion and cured film thereof were characterized by FT-IR, DSC and tensile tester.The result showed that the cured film exhibited the improved thermal resistance and tensile strength.

Key words: isobornyl acrylate, waterborne polyurethane, copolymerization