An improved polyester block copolymer composition having a rubber-like elasticity, particularly having excellent moldability, impact resistance, heat resistance and water resistance, which comprises a polyester block copolymer produced from a crystalline aromatic polyester and a lactone in melt-admixture with a polytetramethylene terephthalate and optionally further with at least one epoxy compound.
一种改进型聚酯嵌段共聚物组合物,具有类似橡胶的弹性,特别是具有优异的成型性、抗冲击性、耐热性和耐
水性,该组合物由结晶芳香族聚酯和内酯与聚
对苯二甲酸四亚甲基酯熔融共混制得的聚酯嵌段共聚物组成,还可选择与至少一种环氧化合物进一步共混。