Liquid-phase process for preparing high molecular weight...

Details Liquid-phase process for preparing high molecular weight... Liquid-phase process for preparing high molecular weight...

C - Chemistry, Metallurgy

08

G

402/234

C08G 69/28 (2006.01)

Patent

CA 1091845

A process for making a high molecular weight polyamide, wherein a diacid-rich component and a diamine- rich component are prepared separately in nonstoichio- metric proportions, each of these components melting below the melting temperature of the polyamide product, and preferably below 200°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 known fiber-forming polyamide and engineering plastic.

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