| 摘要 |
PROBLEM TO BE SOLVED: To provide a hear-resistant flame-retardant resin particle capable of imparting stabilized flame retardance with a small amount of a flame retarder without damaging the foamability, moldability and hear resistance, and foamed articles using the same. SOLUTION: The heat-resistant flame-retardant resin particles comprise foamable resin particles which are constituted by the monomer component composed of 50-80 wt.% styrene, 5-45 wt.% tricyclo [5, 2, 1, 02.6] deca-8-yl methacrylate, and 5-45 wt.%α-methylstyrene and 1-3 wt.%, based on the monomer component, tetrabromobisphenol A diallyl ether as the flame retardant, and the surfaces or the neighborhood of the surfaces of the heat-resistant flame retardant resin particles are coated with an inorganic ammonium salt.
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