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US 4,001,212 AGranted
Macrocyclic polyamines
AssigneeE. I. Du Pont de Nemours and Company
InventorJack E. Richman
Life of this patent
Estimating the term…
Abstract
Macrocyclic polyamines containing 3-7 nitrogen atoms in the ring and destablized to complex formation by (1) an asymmetric ring and/or (2) provision of nitrogen atoms in excess of that required for complex formation are described. The compounds can be used to extract metal ions from solution. The metal complexes are thermally activated curing agents for epoxy resins.
Claims7
A compound having the formula ##SPC8##
- where m is an integer of 3-7, and each n, independently, is an integer of 2-5, with the provisos that
- when m is 3 and two of the n values are 2 or 3, then the third n is 4 or 5, and when m is 4 and one n is 2, then the remaining values of n are 3, 4 or 5.
Dependencies are inferred from the claim text.