| 摘要 |
PROBLEM TO BE SOLVED: To provide a polystyrene resin foam that still retains a high degree of flame retardancy and a sufficient oxygen index even when reducing a blending amount of a brominated butadiene polymer and reduces the occurrence of black specks and the degree of yellow discoloration in a recycled raw material pellet.SOLUTION: In the polystyrene resin foam, a composite flame retardant of (A) a brominated butadiene-styrene copolymer, (B) a tetrabromobisphenol A-bis(2,3-dibromopropyl ether) and (C) a tris(2,3-dibromopropyl)isocyanurate is blended in a specific amount.SELECTED DRAWING: None |
