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US 4,543,407 AGranted
Catalytic process for the manufacture of polyamides from diamines and diamides
AssigneeThe Standard Oil Company
InventorsBenedict S. Curatolo, Robert C. Sentman, Gerald P. Coffey
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Abstract
Nylon-type polyamides are produced from a diamine and a diamide in contact with an oxygenated phosphorus compound catalyst. For example, high quality nylon-6,6 is manufactured by contacting hexamethylenediamine and adipamide in water with an oxygenated phosphorus compound at an elevated temperature and pressure.
Claims17
A process for the manufacture of a solid polyamide comprising contacting an .alpha.,.omega.-diamine, an .alpha.,.omega.-diamide and an oxygenated phosphorus compound catalyst at an elevated temperature and pressure.
Dependencies are inferred from the claim text.