摘要： 高固含量体系相对于传统的固体环氧树脂-聚酰胺体系来说存在着3个不足点:涂膜的柔韧性差、表干时间长以及使用寿命短。本研究以传统的固体环氧树脂-聚酰胺作为参考,讨论了胺类扩链剂对高固含量体系物理机械性能、表干时间以及使用寿命的影响,同时分析了高固含量体系中常用的苯甲醇、单官能度缩水甘油醚和石油树脂对环氧高固含量体系性能的影响。最后,本研究选择N,N’-二甲基-1,6-己二胺作为高固含量体系的扩链剂,其在固化剂中的用量为20%,最终得到的高固含量涂料具备良好的综合性能。

关键词: 高固含量, 胺类扩链剂, 环氧涂料, 表干时间, 使用寿命, 物理性能

Abstract: Compared with the traditional epoxy anticorrosive coatings, high-soli epoxy coatings have three drawbacks: lack of film flexibility, prolonged dry -to -handle time and shorter pot life. In this paper,with traditional epoxy coatings as reference the influence of amine chain extenders on the coatings'physical and mechanical properties, dry -to-handle time and pot life of high-solid epoxy coatings was discussed. Meanwhile, the influence of benzyl alcohol, hydrocarbon resin and monofunctional glycidyl ether, which were the most common additives in high -solid formulation, on the properties of high -solid epoxy coatings was analyzed. Finally, N,N‘-dimethyl-1,6-hexanediamine was chosen as the chain extender for high solid coating, which was used at 20% of the curing agent. The high-solid epoxy coatings with N,N’-dimethyl-1,6-hexanediamine of 20% usage as chain extender exhibits excellent comprehensive properties.

Key words: high-solid, amine chain extender, epoxy coatings, time to dry -to-handle, pot life, physical and mechanical properties