Abstract: Self-healing microcapsules were synthesized by encapsulating epoxy resin /butyl glycidyl ether within the poly (urea-formaldehyde) coating via in-situ polymerization. The optimum reaction conditions for the pre-polymer were to control the pH value at 9～10, the reaction temperature at 60～65 ℃, and the reaction time at 1 h. The optimum conditions of the in-situ polymerization were the pH value of 2, the reaction temperature of 50～60 ℃ and the reaction time of 2 h with sodium dodecyl beneze sulfonate as the surfactant. The as-prepared microcapsules exhibited complete encapsulation with compact and tightly united surface.

Key words: butly glycidyl ether, self-healing, microcapsule, poly(urea-formaldehyde), epoxy resin, synthesis