Patent ID: 6610796
Filing Date: 2003-08-26
Classification: C08G,C08K,C09K

Abstract:
A flame retardant polybutyleneterephthalate resin prepared by:(a) performing a transesterification reaction of a dicarboxylic acid or its ester derivative and a 1,4-butanediol to yield an oligomer; (b) reacting the oligomer with 0.5 to 30 parts by weight of a phosphorus-based flame retardant represented by the following formula I with respect to 100 parts by weight of the dicarboxylic acid or its ester derivative; and (c) performing a polycondensation reaction in the presence of a polycondensation catalyst to prepare a polybutyleneterephthalate: â€ƒwherein R1 and R2 are same or different and are methyl or butyl including a hydroxyl group.