| 摘要 |
PROBLEM TO BE SOLVED: To provide an expandable resin particle, which shows good forming ability even if it is a high molecular weight resin particle having a weight average molecular weight larger than 150,000 in terms of polystyrene, exhibits good retention of an easily volatile blowing agent, and gives highly strong moldings. SOLUTION: An expandable resin particle containing an easily volatile blowing agent, formed by copolymerizing 85-97 wt.% of methyl methacrylate and 3-15 wt.% of acrylonitrile through suspension polymerization, wherein the polydispersity (Mw/Mn, Mw: weight average molecular weight, Mn: number average molecular weight) determined from the molecular weights in terms of polystyrene is 3.0-7.0, and an expanded molding prepared therefrom.
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