Polyamidation process

Details Polyamidation process Polyamidation process

1974-07-31

1976-03-30

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 457R, C08G 600

Patent

active

039474240

ABSTRACT:
In a process for the preparation of fiber-forming polyamides in the presence of a phenylphosphinate where copper from a cupric salt employed in the process tends to precipitate from the system, such copper loss is substantially reduced by using a mol ratio of KBr:KI of greater than 0.33 with 0.7 to 9 mols KI at a total potassium halide concentration of from 7.5 to 26 mols per million grams of polymer.

REFERENCES:
patent: 2705227 (1955-03-01), Stamatoff
patent: 2960489 (1960-11-01), Gabler
patent: 3377314 (1968-04-01), Anton
patent: 3558553 (1971-01-01), Hayes et al.
patent: 3573245 (1971-03-01), Mueller et al.
patent: 3634319 (1972-01-01), Harrison et al.
patent: 3709710 (1973-01-01), Edgar et al.
patent: 3738949 (1973-06-01), Schonberg et al.

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