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US 4,734,487 AGranted
Process for the manufacture of polyamides from diamine and diamide utilizing carboxamide as catalyst
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 a catalyst comprising a carboxamide. For example, high quality nylon-6,6 is manufactured by contacting hexamethylenediamine and adipamide in water with a carboxamide, at an elevated temperature and pressure.
Claims11
A process for the manufacture of a polyamide comprising contacting at least one .alpha.,.omega.-diamine, at least one .alpha.,.omega.-diamide and a catalyst comprising a carboxamide at an elevated temperature and pressure.
Dependencies are inferred from the claim text.