| 摘要 |
Copolyesters useful for fibers from hydroquinone, 3,4'-dicarboxydiphenyl ether and from 10 to 20 mole % of a member of the group consisting of terephthalic acid, 2,6-naphthalenedicarboxylic acid, 4,4'-bibenzoic acid, 2,6-naphthalenediol and 4,4'-dihydroxydiphenyl. |
