A process including: heating to a first polymerization temperature a
first mixture including a free radical polymerizable monomer, a free
radical initiator, and a stable free radical compound to polymerize only
a portion of the monomer, resulting in a prepolymer composition; shearing
a second mixture including the prepolymer composition, a continuous phase
liquid, and a stabilizing compound to create a miniemulsion; and flowing
the miniemulsion within a polymerization reactor and heating the
miniemulsion at a second polymerization temperature to form polymeric
particles wherein the formation of the polymeric particles occurs while
the miniemulsion flows within the reactor.