| 摘要 |
PROBLEM TO BE SOLVED: To provide a self fire-extinguishable foamable polystyrene-based resin particle that can incorporate a flame retardant uniformly, and can be used for producing a foamed molded article that gives a good cutting plane when being cut by nichrome wire heating. SOLUTION: The method for producing the self fire-extinguishable foamable polystyrene-based resin particle comprises impregnating a 100 pts.wt. polystyrene-based resin with a 0.3-2 pts.wt. powdered flame retardant and a foaming agent in a state of an aqueous suspension, wherein, the impregnation of the flame retardant is performed before or during the impregnation of the foaming agent through adding a dispersion, that is prepared by dispersing a 5-40 pts.wt. flame retardant and a 2-10 pts.wt. slightly water soluble inorganic salt to a 100 pts.wt. aqueous medium, to the aqueous suspension. COPYRIGHT: (C)2008,JPO&INPIT
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