Synthesis and properties of a nonionic water-based epoxy curing agent

Owing to the requirement for environmental protection, water-based coatings have become a significant trend in development of coatings. The epoxy curing agent has also hot research topic. In this study, B-A-B compound with long hydrophobic alkyl chain connected intermediate nitrogen atom was synthesized at both ends molecule using ethylene glycol diglycidyl ether and 3,4-dimethoxyaniline as raw materials. Subsequently, sealed triethylenetetramine. A nonionic, resin amino groups prepared. target product structure confirmed by infrared spectroscopy (IR), Mass spectrum (MS), Nuclear magnetic resonance hydrogen ( 1 H-NMR). Additionally, through three factors levels orthogonal experimental design, optimum conditions were confirmed, yield 82.83%. thermogravimetric analysis (TGA) indicated that monomer exhibited weight loss temperature range 320–450°C. pencil hardness, flexibility, impact resistance waterborne coating film prepared non-ionic reached or exceeded those similar products China foreign countries.