| 摘要 |
<p>A process for making a high molecular weight polyamide, wherein a diacid-rich component and a diaminerich component are prepared separately in nonstoichiometric proportions, each of these components melting below the melting temperature of the polyaminde product, and preferably below 200.degree.C; and then the diacid-rich component and the diamine-rich component are contacted in liquid state at high enough temperature to prevent solidification, and in proportions such that the total amounts of diacid and diamine, whether combined or not, are as much as possible stoichiometric. A major utility of this process is in the production of Nylon 66, a know fiber-forming polyamide and engineering plastic.</p> |
