Patent ID: 7985524

Claim:
An emulsion aggregation process for forming curable powder, comprising: a) mixing curable resin particles comprising an epoxy resin and an aggregating agent in an aqueous dispersion, the aqueous dispersion comprising an anionic surfactant; b) heating the dispersion to a temperature below the glass transition temperature of the resin to form aggregated particles; c) heating the dispersion containing the aggregated particles to a temperature at or above the glass transition temperature of the resin to form coalesced particles in the dispersion; d) adding at least one curing agent to the coalesced particles, the curing agent being selected from the group consisting of polyfunctional amines, dicyanodiamide, bisphenol A, bisphenol S, hydrogenated bisphenol, polyphenolics, imidazoles, beta-hydroxy-alkylamide, urethdione, and polyfunctional isocyanates, and e) removing the coalesced particles from the dispersion to form a curable powder.