Flame-retardant resin composition and electric wire using same

A flame-retardant resin composition, comprising the below-described component (A) or both of components (A) and (B) as a flame retardant component(s) in a halogen-free thermoplastic resin,

• wherein, when said flame-retardant resin composition comprises said component (B), the ratio of said components (A) and (B) is 100:0 to 60:40 in terms of mass ratio;
• the electric conductivity of a gas generated during combustion, which is measured in accordance with IEC 60754-2, is not higher than 10.0 μS/mm;
• and the flame retardancy rating measured in accordance with the UL94VTM standard is VTM-2 or higher:
• component (A):
• a (poly)phosphate compound represented by the following Formula (1):
• (wherein, r represents a number of 1 to 100;
• Y1 represents [R1R2N(CH2)mNR3R4], piperazine or a piperazine ring-containing diamine;
• R1, R2, R3 and R4 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms;
• R1, R2, R3 and R4 may be the same group or different groups;
• m represents an integer of 1 to 10;
• and q represents a number which satisfies a relationship, 0<q≦r+2);
• and
• component (B):
• a (poly)phosphate compound represented by the following Formula (2):
• (wherein, n represents a number of 1 to 100;
• X1 represents ammonia or a triazine derivative represented by the following Formula (3);
• and p represents a number which satisfies a relationship, 0<p≦n+2)
• (wherein, Z1 and Z2 may be the same or different and are each a group selected from the group consisting of a —NR5R6 group [wherein, R5 and R6 each independently represent a hydrogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms or a methylol group], a hydroxy group, a mercapto group, a linear or branched alkyl group having 1 to 10 carbon atoms, a linear or branched alkoxy group having 1 to 10 carbon atoms, a phenyl group and a vinyl group).