PREPARATION OF METHACRYLIC POLYMER

摘要

PROBLEM TO BE SOLVED: To provide a continuous polymerization method of a methacrylic polymer excellent in operational stability of polymerization and reduced in spots of the copolymerization composition ratio of the formed polymer. SOLUTION: In continuously feeding a monomer mixture having methyl methacrylate as the major component and a polymerization initiator into a complete mixing-type reactor to effect bulk or solution polymerization, the average retention time of the reaction liquid is rendered constant and, the polymerization initiator and the mixing time in the reactor are selected in such a manner that the highest peak temperature at which the polymer conversion comes to a maximum is present in the range of 110-160 deg.C to effect the polymerization in the range of the peak temperature±10 deg.C.