Abstract: This paper introduces the principles of dispersion of hydroxyl acrylic resin in water and the selection of polymerization solvent and the co-solvent of water dispersion. It summarizes the latest development in preparing high solids and low viscosity water-borne hydroxyl acrylic resin, including higher temperature of polymerization, choosing peroxide di-tert-pentyl to synthesize low molecular weight and low-degree crosslinking polymers, synthesizing core-shell structure, or branching structure hydroxyl acrylic resin from glycidyl versatate, vinyl versatate, methacrylic acid benzyl ester, (meth) acrylate isobornyl ester, methacrylic acid cyclohexyl ester, methyl acrylic acid tert-butyl cyclohexyl ester and other functional monomers, preparing a specially-structured or low-molecular weight copolymer by using multi-step polymerization technology (with a brief analysis of its principle). In conclusion, this article describes some existing problems about hydroxy acrylic resin aqueous dispersion, including water resistance, solvent resistance, stability, and film-forming properties, and proposes how to solve the above problems, including polymer structure, film-forming mechanism, and coating formulations.

Key words: high solids, low viscosity, hydroxyl, aqueous dispersions

摘要： 介绍了羟基丙烯酸树脂的水分散规律及原理、溶液聚合的溶剂及水分散的助溶剂的选用方法。综述了制备高固体分低黏度羟基丙烯酸树脂水分散体的研究进展，主要包括提高聚合温度、选用过氧化二叔戊基等引发剂合成低分子量低交联度聚合物；合成核壳结构或以叔碳酸缩水甘油酯、叔碳酸乙烯酯、甲基丙烯酸苄酯、(甲基)丙烯酸异冰片酯、甲基丙烯酸环己酯、甲基丙烯酸叔丁基环己酯等功能单体合成枝化结构羟基丙烯酸树脂；采用多步聚合工艺制备具有特殊结构或较低分子量的共聚物，并对其原理进行了简要分析。最后总结了羟基丙烯酸树脂水分散体目前存在的一些问题，主要包括耐水耐溶剂性、稳定性、成膜性等；并对解决上述一系列问题的研究方向进行了展望，主要包括树脂结构、成膜机理、涂料配方等。

关键词: 高固体分, 低黏度, 羟基, 水分散体