METHOD FOR PREPARING POLYMETHYLMETHACRYLATE SPHERICAL BEAD

摘要

This invention provides a method for preparing a polymethylmethacrylate spherical bead and in particular, it provides a method for preparing a polymethylmethacrylate spherical bead char¬ acterized in that it is prepared by preparing polymethylmethacrylate by polymerizing methyl- methacrylate monomers, evaporating remaining methylmethacrylate monomers by raising temperature up to at least 100 °C after the polymerization reaction, and washing the polymethyl¬ methacrylate with a mixed solvent of ethanol and water and vacuum drying them. The polymethylmethacrylate spherical beads in accordance with the invention not only can provide pure polymethylmethacrylate in its odorless condition by completely eliminating the remaining methylmethacrylate monomers that generate off-odor but also show no yellowing and at the same time, they are suitable for cosmetic materials or industrial materials because they are harmless to human and have no off-odor.