The amount of catalyst can be reduced by selecting nice solvability catalyst, cutting down the remnant carboxyl amount of esterification and elevating polycondensation temperature.
The amount of catalyst can be reduced by selecting nice solvability catalyst, cutting down the remnant carboxyl amount of esterification and elevating polycondensation temperature.
选择溶解性能好的催化剂，降低酯化残存羧基量，提高缩聚温度，可减少催化剂用量。