| abstract |
The present invention relates to a method for producing polymethyl methacrylate having excellent light transmittance and discoloration resistance. Mixing an alkyl acrylate, an initiator, a liquid dispersion medium, a suspending agent, a buffer salt, and a chain transfer agent, followed by suspension polymerization to produce polymethylmethacrylate beads; And extruding the polymethyl methacrylate beads by washing and drying the resulting polymethyl methacrylate beads with simple mixing with inorganic phosphorus compounds and organic phosphorus compounds. It is effective to improve. |