FLAME RETARDANT FOR POLYESTER FIBER, METHOD FOR PRODUCING FLAME-RETARDANT POLYESTER FIBER PRODUCT USING THE SAME, AND FLAME-RETARDANT POLYESTER FIBER PRODUCT OBTAINED FROM THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a flame retardant for polyester fibers which is excellent in exhaustion and durability, and little in hardening.SOLUTION: The flame retardant for polyester fibers contains tris(2,3-dibromopropyl)isocyanurate and a polyester resin represented by formula (1) [wherein, Ris H or a group represented by formula (2)] and having a weight-average molecular weight of 5,000 to 200,000.