双组分水性环氧底漆性能影响因素的探究

Study on Factors Influencing the Performance of Two-Component Waterborne Epoxy Primer

采用水性环氧乳液和水性胺类固化剂作为成膜物质,制备了一种双组分水性环氧底漆。重点考察了环氧乳液和固化剂种类、环氧基与活泼氢物质的量之比以及颜基比等对涂膜的早期耐水性和固化完全后漆膜综合性能的影响。结果发现,当采用STW602K乳液搭配STW703C固化剂,环氧基与活泼氢物质的量之比为1∶0.8,颜基比为2.1∶1时,所制备的双组分水性环氧底漆有较好的早期耐水性和耐盐雾性能,能满足集装箱、工程机械、钢结构等行业的防腐要求。

A two-component waterborne epoxy primer was prepared by using waterborne epoxy emulsion and waterborne amine curing agent as film-forming materials.The effects of the types of epoxy emulsion and curing agent,the molar ratio of epoxy group to active hydrogen and pigment/binder ratio on the early water resistance of the film and the comprehensive properties of the cured film were investigated.The results showed when STW602K is matched with STW703C,the molar ratio of epoxy group to active hydrogen is 1∶0.8,and pigment/binder ratio is 2.1∶1,the two-component waterborne epoxy primer has good early water resistance and salt spray resistance,and can meet the anti-corrosion requirements from container,engineering machinery,steel structure and other industries.