| abstract |
In the present invention, a polymer dispersant (A) represented by the following formula (1) and an inorganic salt and/or an organic salt (B) containing an alkali metal salt, an alkaline earth metal salt or an ammonium salt are added to form a methyl group. Suspension polymerization of methyl acrylate alone or a monomer mixture containing methyl methacrylate as a component can produce an optical film suitable for use as an optical film having excellent transparency, color tone, and less defects such as fish eyes. A methacrylic resin. □ (n=10~60 mol%, m=40-90 mol%, R1 represents hydrogen or methyl group, R2 represents an alkyl group having 1-8 carbon atoms, and M represents an alkali metal or alkaline earth metal, or NH4.) |