Blocked isocyanate
AssigneeAmerican Cyanamid Company
InventorsBalwant Singh, Robert W. Novak
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Abstract
The novel compound, N,N'-methylenebis (hexahydro-2-oxo-1H-azepine-1-carboxamide) which is useful as a blocked isocyanate to introduce the functionality of methylene diisocyanate and which is prepared by the reaction of isocyanic acid and caprolactam followed by reaction with formaldehyde.
Claims3
N,N'-methylenebis (hexahydro-2-oxo-1H-azepine-1-carboxamide).
A process for the preparation of a blocked isocyanate which comprises reacting hexahydro-2-oxo-1H-azepine-1-carboxamide with formaldehyde to yield N, N'-methylenebis (hexahydro-2-oxo-1H-azepine-1-carboxamide).
A process for preparing hexahydro-2-oxo-1H-azepine-1-carboxamide which comprises reacting caprolactam with isocyanic acid.
Dependencies are inferred from the claim text.