| abstract |
A copolymer constituted of units comprising maleimide monomer units and/or unsaturated dicarboxylic anhydride monomer units, wherein the content of unreacted monomers is 200 ppm or lower and the content of an adduct of the constituent monomer(s) with other compound(s) is 0.1 to 3,000 ppm; and a thermoplastic resin composition comprising a maleimide copolymer constituted of units comprising maleimide monomer units and aromatic vinyl monomer units, a graft polymer formed from a rubbery polymer and an aromatic vinyl monomer, etc., and other thermoplastic resin(s), wherein the content of the unreacted maleimide monomer is 10 ppm or lower, the total content of volatiles other than the maleimide monomer is 0.5 wt.% or lower, and the content of adducts of the maleimide monomer with compounds other than the constituent monomers is 0.1 to 3,000 ppm. |