| abstract |
The present invention provides a maleimide-based copolymer, a method for producing same, and a resin composition obtained using same. n This maleimide-based copolymer contains 40-60 mass% of aromatic vinyl monomer units, 5-20 mass% of vinyl cyanide monomer units, and 35-50 mass% of maleimide monomer units, and is such that a 4 mass% tetrahydrofuran solution of the copolymer has a transmittance of 90% or more for light having a wavelength of 450 nm at an optical path length of 10 mm, and the residual maleimide-based monomer amount is less than 300 ppm. This maleimide-based copolymer preferably further contains 0-10 mass% of unsaturated dicarboxylic acid anhydride monomer units, and preferably has a glass transition temperature of 165 °C or higher. |