Abstract
Sub-micron waterborne dispersions of crosslinked bisphenol A epoxy resin were prepared by a phase-inversion emulsification process in the presence of N,N-dimethylbenzylamine as the curing agent. Differential scanning calorimetry was used to monitor the extent of crosslinking by post-polymerization. The time and temperature of post-polymerization influence the extent of crosslinking. Particle size could be controlled in the range 100–300 nm with a narrow size distribution by varying the content of curing agent and polymeric emulsifier, as investigated by means of scanning electron microscopy. A tentative physical model of the phase-inversion emulsification process in the presence of curing agent is proposed.
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