An aromatic polyester consisting essentially of (1) p-oxybenzoyl units or the 3-methyl- or 3-chloro-derivatives thereof; (2) 3,4'-dioxydiphenylether or 3,4'-dioxybenzophenone units or the 3'-methyl- or 3'-chloro-derivatives thereof or terephthaloyldi (3-methyl-4-oxybenzene) units; and (3) terephthaloyl units and filaments thereof.
一种芳香族聚酯,主要由 (1) 对氧苯甲酰基单元或其 3-甲基-或 3-
氯-衍
生物;(2) 3,4'-二氧
二苯醚或 3,4'-二氧
二苯甲酮单元或其 3'-甲基-或 3'-
氯-衍
生物或对苯二甲酰基(3-甲基-4-氧苯)单元;以及 (3) 对苯二甲酰基单元及其细丝组成。