该专利涉及一种含短聚酰胺段的脂肪族聚酯酰胺的制备方法。该方法采用将环状内酰胺或氨基酸与氨基醇聚合制备聚酰胺低聚物,再与脂肪族二元酸、二元醇进行熔融缩聚,制备同时带有端羧基和端羟基结构的聚酯酰胺预聚体, The patent relates to a short polyamide segment containing aliphatic polyester amide preparation. In the method, a cyclic lactam or an amino acid is polymerized with an amino alcohol to prepare a polyamide oligomer, and the mixture is then subjected to melt polycondensation with an aliphatic dibasic acid or a diol to prepare a polyester amide having both terminal carboxyl groups and terminal hydroxyl groups Prepolymer,