| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition that has excellent flame retardancy suited to United States UL standard 94V-2 without using a halogen-based flame retardant, and excels in light resistance, and property balance. <P>SOLUTION: The flame-retardant thermoplastic resin composition comprises 5-20 pts.mass of a phosphorus-based flame retardant (C) based on 100 pts.mass of a copolymer mixture consisting of: a graft copolymer (A) that is configured by graft-polymerizing a rubbery polymer with a vinyl cyanide compound and a copolymerizable vinyl compound; and a vinyl copolymer (B) having a mass average molecular weight of 90,000-160,000, which is configured by copolymerizing a vinyl cyanide compound and a copolymerizable vinyl compound. The phosphorus-based flame retardant (C) includes triphenylphosphine oxide. In the copolymer mixture, the unit amount CB<SB POS="POST">1</SB>of vinyl cyanide in the acetone insoluble part is 22.0-32.0 mass%; the unit amount CB<SB POS="POST">2</SB>thereof in the acetone soluble part is 22.0-34.0 mass%, and ¾CB1-CB2¾ is 0-3.0 mass%. <P>COPYRIGHT: (C)2012,JPO&INPIT |
