METHOD FOR PREPARING A POLYESTER RESIN

摘要

Disclosed is a method for preparing a polyester resin, wherein phosphate additives are used in preparing a polyester resin to improve the reactive property of the esterification reaction or transesterification, as well as the flame retardancy property and the color stability of a polyester resin. The method for preparing a polyester resin comprises the steps of: esterification reacting and/or transesterifying diacid ingredients and diol ingredients in the presence of one or more phosphate additives selected from a group consisting of the compounds as defined in chemical formulas 1 to 3 in the detailed description of the invention; and polycondensing the products obtained from the esterification reaction and/or transesterification.