Patent ID: 6632891
Filing Date: 2003-10-14
Classification: C08G

Abstract:
A flame-retardant resin composition, comprising a phosphazene flame retardant and a polyester resin, wherein the flame retardant is bonded to the polyester resin by an ester group thereof, wherein the phosphazene flame retardant is a phosphazene of formula (I) whereinn is an integer, X and Y are independently, O, S, NH or NR3, wherein R3 is an alkyl group having 1 to 4 carbon atoms, at least one of R1 and R2, which are n in number, is a group selected from the group consisting of formula (2) â€ƒand the remaining R1 and R2 groups are independently, a group selected from the group consisting of formula (3) whereineach of R4, R6 and R7 is a hydrogen atom or alkyl group having 1 to 4 carbon atoms, R5 is an alkyl group having 1 to 4 carbon atoms, m is an integer of 1 to 10, and n is an integer of 3 to 25 when the phosphazene is a cyclic compound, or an integer of 3 to 1000 when the phosphazene is a straight-chain compound.