摘要： 通过加入双官能团单体甲基丙烯酸 －β－羟乙酯（ＨＥＭＡ），采用溶液聚合法和原位乳液聚合法，把聚氨酯与丙烯酸（ＡＡ）、丙烯酸丁酯（ＢＡ）和苯乙烯（Ｓｔ）等丙烯酸酯单体接枝共聚，合成了 ＰＵＡ为壳、ＰＡ为核的聚氨酯 －丙烯酸酯（ＰＵＡ）复合乳液，研究了壳层 ＰＡ／ＰＵ、总 ＰＡ／ＰＵ、核壳比、ＢＡ／Ｓｔ、壳层 ＨＥＭＡ／ＰＡ和链转移剂含量对乳液制备过程、乳液及涂膜性能的影响。研究结果表明：ＰＵＡ中的 ＰＡ、ＢＡ、Ｓｔ、ＨＥＭＡ、链转移剂和 ＤＭＰＡ与 ＡＡ中的—ＣＯＯＨ的含量（壳层 ＰＵＡ的质量分数）分别为 ５５.６％、２５％、１７.８％、９％、１％和 ７％，核壳质量比为 １∶４时，复合乳液涂膜结构规整，各项性能较好。ＰＵＡ胶粒的平均粒径在 １００ｎｍ左右时，分布更均匀。

关键词: 核壳结构, 水性聚氨酯, 丙烯酸酯, 复合乳液

Abstract: The title polyurethane (shell-acrylate (core )hybrid emulsion was prepared by grafting polymerization of PUA and AA, BA and St and HEMA as bi-functional monomer in the process of solution and in-situ emulsion polymerization. The influence of PA/PU (shell), PA/PU(total), core/sell, BA/St,coatings film was discussed. The results indicated that when the mass ratio of the PA, BA, St,HEMA,chain transfer in PUA and - -COOH in DMPA and AA were 55.60, 25%, 17. 8%, 9%,1%and 7% re-spectively and core/shell ratio 1: 4 the hybrid emulsion film should regular structure and good performance. The puA particle size was around 100 nm with even distribution.

Key words: core-shell structure, WPU, acrylate, hybrid emulsion