| 摘要 |
PURPOSE:To obtain the titled resin particles, containing a readily volatile foaming agent, capable of reducing evaporation of the readily volatile foaming agent and having excellent preservation stability, by sulfonating, chlorosulfonating or chlorophosphonating the surface layer part. CONSTITUTION:Particles obtained by sulfonating, chlorosulfonating or chlorophosphonating the surface layer part of expandable polyolefin based resin particles containing a readily voltatile foaming agent, e.g. propene, pentane, etc. The layer thickness of the surface layer part is desirably 1-200mu and the content of the readily volatile foaming agent is preferably 3-30wt% based on the resin content.
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