| 摘要 |
PROBLEM TO BE SOLVED: To provide a flame-retardant resin composition, which exhibits excellent flame retardancy when used in small amounts and does not generate any halogen gas when heated or burnt, by compounding a phosphazen derivative and a metal hydroxide as a flame retardant in a polyolefin resin. SOLUTION: A cyclic phosphazen derivative (A) represented by formula I [wherein, (m) is 3 to 10; Q represents an aryloxy group of OAr or an alkoxy group of OR in which the numbers of OAr and OR in the molecule satisfy all the following relations: 1<=(the number of OAr groups)<=2m-1, 1<=(the number of OR groups)<=2m-2n=, and (the number of OAr groups)+(the number of OR groups = 2m)], and a metal hydroxide (B) represented by formula II (wherein Z represents 2 or 3; and M is a metal selected from metals of groups IIa and IIb and groups IIIa and IIIb of the periodic table) are compounded as a flame retardant in a polyolefin resin. The flame retardant is compounded in an amount of 10 to 60 wt.% based on the total weight of the resin and flame retardant provided that the components (A) and (B) are used at rates of 1 to 40 wt.% of the component (A) and 99 to 60 wt.% of the component (B), thereby obtaining a flame-retardant polyolefin resin composition having an oxygen uindex of 27 or over. |
