Preparation of polyamide from oligomeric poly-N-carboxylic anhyd

Details Preparation of polyamide from oligomeric poly-N-carboxylic anhyd Preparation of polyamide from oligomeric poly-N-carboxylic anhyd

1975-09-05

1977-04-05

Anderson, Harold D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 775C, 260 775CA, 260858, C08G 1810, C08G 6900

Patent

active

040161447

ABSTRACT:
Novel oligomeric poly N-carboxylic anhydrides having the following structure are disclosed. ##STR1## The unit Ar represents arylene and x represents an integer from 1 to 10 and y represents a number having an average value from 0 to 4. The polyanhydrides serve as useful storage stable intermediates for the production of polyamides to which they are easily converted by the elimination of carbon dioxide. A process for the preparation of the polyanhydrides from arylene diisocyanates and .alpha.,.omega.-alkylene dicarboxylic acids is disclosed. Processes for the conversion of the polyanhydrides to the corresponding polyamides are also disclosed.

REFERENCES:
patent: 2268586 (1942-01-01), Gilman
patent: 3642715 (1972-02-01), Allard

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