| abstract |
(57) [Summary] [Purpose] To obtain a maleimide copolymer having excellent transparency, heat resistance, impact resistance and weather resistance. [Structure] Dithiocarbamine is added to a reaction mixture containing a maleimide-based copolymer obtained by a copolymerization reaction of a monomer component essentially containing an aromatic vinyl-based monomer (a) and a maleimide-based monomer (b). After the addition of the acid metal salt, the volatile components are removed from the reaction mixture while suppressing the polymerization of the unreacted monomer remaining in the reaction mixture to obtain a maleimide-based copolymer. |