摘要： 【目的】为获得兼顾高光泽高硬度的羟基丙烯酸酯乳胶。【方法】以丙烯酸丁酯（BA）、丙烯酸异辛酯（EHA）为软单体，苯乙烯（St）、甲基丙烯酸甲酯（MMA）为硬单体，含羟基化合物为功能单体，通过核壳乳液聚合，制备了羟基丙烯酸酯微球乳胶。着重研究了丙烯酸羟丙酯（HPA）、甲基丙烯酸羟丙酯（HPMA）、甲基丙烯酸羟乙酯（HEMA）、己内酯改性甲基丙烯酸羟乙酯（HAM3）、己内酯改性丙烯酸羟乙酯（HA2）几种羟基单体及不同羟基含量对乳胶粒径和稳定性的影响，并进一步探究了羟基含量对由乳胶制备的聚氨酯漆膜性能的影响。【结果】成功制备了羟基含量为 2. 8%的高光泽高硬度的羟基丙烯酸酯乳胶，粒径分布窄，与异氰酸酯固化剂相容性好，与固化剂结合后所到的漆膜光泽（60°）为 91. 3，硬度为 2H。【结论】以 HEMA作为羟基单体得到的乳胶稳定性好，粒径均一，与固化剂相容性良好；随着羟基含量的增加，与异氰酸根反应的羟基位点增加，交联程度得到提升，得到的聚氨酯漆膜更加致密，硬度更高，但乳胶粒径总体呈增加的趋势，凝胶率增加，需要对体系的乳化稳定性做细致的调控才能得到更佳的效果。

关键词: 羟基丙烯酸酯乳胶, 羟基单体, 聚氨酯漆膜, 高光泽, 高硬度

Abstract: ［Objective］ Obtain hydroxyacrylate latex with high gloss and high hardness.［Methods］Hydroxyacrylate microsphere latex were prepared by core-shell emulsion polymerization， using butyl acrylate（BA）and 2-ethylhexyl acrylate（EHA）as soft monomers，styrene（St）and methyl methacrylate（MMA）as hard monomers，and hydroxyl-containing compounds as functional monomers.The article focused on studying the effects of five hydroxyl monomers，namely hydroxypropyl acrylate（HPA），hydroxypropyl methacrylate（HPMA），hydroxyethyl methacrylate（HEMA），caprolactone-modified hydroxyethyl methacrylate（HAM3）and caprolactone-modified hydroxyethyl acrylate（HA2）， and their different hydroxyl contents on the size and stability of latex，and further explored the influenceof hydroxyl contents on the properties of polyurethane paint films prepared from the latex.［Results］A high gloss and high hardness hydroxyacrylate latex with a hydroxyl content of 2. 8% was successfully prepared，with a narrow particle size distribution and good compatibility with isocyanate curing agent， and a gloss（60°）of 91. 3 and a hardness of 2H film was obtained when combined with the curing agent.［Conclusion］Latex obtained with HEMA as the hydroxyl monomer had good stability，uniform particle size，and good compatibility with curing agent. With the increase of hydroxyl content，the hydroxyl sites reacted with isocyanate increased，the degree of cross-linking was improved，and the polyurethane film was denser and harder，but there was a general trend of increase in the size of the latex，and the gel rate increased，so it was necessary to do a careful control on the emulsification stability of the system inorder to get a better effect.

Key words: hydroxyacrylate latex, hydroxyl monomer, polyurethane paint film, high gloss, high hardness

中图分类号: 

• TQ630. 4