Abstract: In this paper, two hydroxyl acrylic resins were synthesized by different solution polymerization process. The influence of different process on the relative molecular mass and viscosity of polymer were studied. Two kinds of hydroxyl acrylic resins were cured with hexamethylene diisocyanate (HDI) trimer. And the mechanical properties of the resins and their crosslinked film were characterized. The results showed that different process have significant influence on the relative molecular mass and viscosity of polymer.

Key words: hydroxyl acrylic resin, high solid, HDI, process study

摘要： 为了研究不同工艺对聚合物相对分子质量和黏度的影响，采用 2 种不同的溶液聚合工艺制备 2种不同的丙烯酸树脂样品，并采用六亚甲基二异氰酸酯（HDI）三聚体对其进行交联固化。 采用红外光谱对树脂结构进行了表征，交联固化涂膜的机械性能测试结果表明：不同的合成工艺对树脂的相对分子质量和黏度有较大的影响。

关键词: 羟基丙烯酸树脂, 高固体分, 六亚甲基二异氰酸酯, 工艺研究