Method for reducing the terminal carboxyl group content of a saturated polyester, a saturated polyester having a reduced terminal carboxyl group content, and a molded article composed of such a saturated polyester
申请人:TEIJIN LIMITED
公开号:EP0030350A1
公开(公告)日:1981-06-17
Saturated polyesters having a reduced terminal carboxyl group content are produced by reacting a carboxyl-terminated, substantially linear, fiber-forming saturated polyester with a monocyclic imino ether compound of the formula
e.g.
or
The monocyclic imino ether compound may be added in a melt-molding machine at a temperature above the temperature at which the saturated polyester melts, or a molded article composed of a carboxyl-terminated, substantially linear, fiber-forming saturated polyester may be treated with the monocyclic imino ether compound.
末端羧基含量较低的饱和聚酯是通过将羧基末端的、基本线性的、可成纤维的饱和聚酯与式 如下的单环亚胺醚化合物反应制得的
例如
或
单环亚胺醚化合物可在高于饱和聚酯熔化温度的熔融成型机中加入,或者用单环亚胺醚化合物处理由羧基封端、基本线性、成纤的饱和聚酯组成的成型制品。