Patent ID: 7968629

Claim:
A flame retardant polyamide resin composition comprising 100 parts by weight of an aliphatic polyamide resin (A) having a viscosity number of 70 to 200 ml/g, 0.1 to 2.8 parts by weight of a polyphenylene ether-based resin (B), and 5 to 100 parts by weight of a flame retardant agent (C) comprising at least the following components (a), (b) and (c): (a) a reaction product of a melamine and a phosphoric acid, (b) a phosphinic acid salt represented by the general formula (I) shown below and/or a diphosphinic acid salt represented by the general formula (II) shown below, and (c) a metal salt of boric acid, wherein a compounding weight ratio (a):(b):(c) of the flame retardant agent components is 1:(0.5 to 2.5):(0.01 to 1), (wherein R 1 and R 2 are the same or different and each represent linear or branched C 1 to C 6 alkyl and/or C 6 to C 10 aryl, R 3 represents linear or branched C 1 to C 10 alkylene, C 7 to C 10 arylene, C 7 to C 10 alkylarylene or C 7 to C 10 arylalkylene, M is Ca, Mg, Al or Zn, m is a valence of M, n is 1 or 3 and x is 1 or 2, with the proviso that 2n=mx), and wherein the flame retardant polyamide resin composition passes the tracking resistance test performed in accordance with IEC 60112 standard at an applied voltage of 500 V when molded into an article having a thickness of 3 mm.