Process for preparing polyamide from diacid-rich component and d

Details Process for preparing polyamide from diacid-rich component and d Process for preparing polyamide from diacid-rich component and d

1977-08-10

1978-12-26

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C08G 6928

Patent

active

041317122

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

REFERENCES:
patent: 3884881 (1975-05-01), Bice et al.
patent: 4009153 (1977-02-01), Shin

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