| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a polystyrene resin extrusion foam good in flame retardancy, high in oxygen index and excellent in recyclability.SOLUTION: There is provided a manufacturing method of a polystyrene resin extrusion foam by extrusion foaming a foamable resin molten material obtained by mixing a polystyrene resin, a flame retardant and a foaming agent, where the flame retardant contains (A) brominated isocyanurate, (B) a mixture of (B1) an organic compound having a 2,3-dibromo-2-methylpropyl group and (B2) an organic compound having a 2,3-dibromopropyl group and/or (C) a brominated styrene-butadiene copolymer and blended ratio of the (A), the (B) and the (C) is (A):(B)+(C)=30:70 to 80:20 (weight ratio).SELECTED DRAWING: None |
