The present invention describes a process of preparing microcapsules in a
UV curable water immiscible phase. The microcapsules formed according to
the invention contain an aqueous phase core. The process comprises
dispersing a water soluble or dispersible core material along with at
least one wall forming prepolymer and a polycondensation polymerization
catalyst into an aqueous solution. The aqueous phase is then dispersed
into the water immiscible phase comprising UV curable monomers or
oligomers forming droplets of the aqueous phase solution in the water
immiscible phase. Polycondensation of the prepolymers is initiated to
form polymeric wall material or microcapsules at or near the interface of
the water immiscible solvent and droplets of aqueous phase solution.
Following capsule formation, a UV initiator is dispersed in the water
immiscible phase. The UV curable dispersion containing aqueous
microcapsules can be coated on a substrate. The coating is then cured by
UV irradiation forming a gelled, solidified, or dry coating of aqueous
microcapsules.