| 摘要 |
PROBLEM TO BE SOLVED: To provide a method that produces a flame-retardant thermoplastic resin composition comprising a thermoplastic resin and an aromatic phosphazene compound with favorable workability, industrially and stably.SOLUTION: A production method of a flame-retardant thermoplastic resin composition is a method that produces the flame-retardant thermoplastic resin composition including a thermoplastic resin (A) and an aromatic phosphazene compound (B) using an extruder, wherein the extruder has a first raw material supply port disposed at an upstream side regarding a flow direction of a raw material, and a second raw material supply port disposed at a downstream side, the thermoplastic resin (A) is supplied from the first raw material supply port, and the aromatic phosphazene compound (B) is added from the second raw material supply port in a liquid state. |
