| 摘要 |
PURPOSE:To obtain the title resin excellent in heat resistance, weathering resistance and impact resistance, by suspension-polymerizing a mixture comprising specified proportions of an aromatic vinyl monomer, vinyl cyanide monomer, a maleimide monomer and a copolymerizable monomer. CONSTITUTION:3-97wt.% aromatic vinyl monomer (A) at least partially consisting of styrene is mixed with 0-35wt.% vinyl cyanide monomer (B) (e.g., acrylonitrile), 3-50wt.% maleimide monomer (C) (e.g., N-methylmaleimide) and 0-3wt.% monomer (D) copolymerizable therewith (e.g., methyl metacrylate) so that the molar ratio of component C to styrene may be 1:1-1:5, and the resulting mixture is suspension-polymerized at 40-140 deg.C for 4-20hr in the presence of a suspending agent (e.g., PVA), a dispersion aid (e.g., polyoxyethylenemonostearyl) and a polymerization initiator (e.g., t-butylperoxy 2-ethylhexanoate).
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