Process for preparing epoxy-acrylic hybrid emulsions

摘要

The present invention relates to a process for preparing epoxy-acrylic hybrid emulsions having an polyepoxide content of up to 95% based on the total weight of resin solids in the emulsion. The process involves (I) dissolving a polyepoxide with at least one acrylate monomer in the presence of water and a surfactant to form a mixture; (II) microfluidizing or homogenizing the mixture in a microfluidizer or homogenizer having a chamber pressure of from about 6,000 psi to about 15,000 psi to form a pre-emulsion; and (III) polymerizing the pre-emulsion in the presence of a free radical polymerization catalyst. The epoxy-acrylic hybrid emulsion can be formulated into solvent-free wood coatings, direct-to-metal coatings and paint.