A PROCESS FOR PREPARING BEADS

摘要

A polymerization process in aqueous suspension of acrylic and/or vinylic monomers to obtain beads having a diameter from about 2 micron to about 80 micron, wherein radical initiators soluble in the monomer and a suspending agent in an amount in the range 0.02%-6% by weight, with respect to the continuous phase (water), are used, wherein : the polymerization in aqueous phase is carried out in the presence of a surfactant in an amount from 1 to 10,000 ppm, with respect to the continuous phase ; the ratio between the continuous phase and the discontinuous phase (monomer mixture) is in the range 1.3:1 - 8:1.