| 摘要 |
PURPOSE:To obtain a polymer outstanding in heat and impact resistances and fluidity in the molding, by polymerization of two or more kinds of monomer in the presence of a rubbery polymer, in which the maleimide monomer is added after the phase conversion of the rubbery polymer instead of adding at the beggining. CONSTITUTION:In carrying out bulk or bulk-suspension polymerization of a monomer mixture comprising a maleimide monomer (e.g., N-phenyl maleimide, N-cyclohexyl maleimide, accounting for 3-40wt%), aromatic vinyl compound (e.g., styrene, accounting for 40-80wt%) and unsaturated nitrile compound (e.g., acrylonitrile accounting for 10-30wt%) in the presence of a rubbery polymer such as polybutadiene or styrene-butadiene rubber (pref., in general, accounting for 5-15wt%). The monomers except the maleimide one are involved in the reaction; and after the virtual phase conversion of the rubbery polymer, said maleimide monomer is added to the system to proceed with the polymerization, thus obtaining the objective polymer. |
