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US 5,041,668 AGranted
Secondary diamines
AssigneeEthyl Corporation
InventorsChristopher J. Nalepa, J. Kenneth Presswood, Gordon G. Knapp
Life of this patent
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Abstract
Aromatic diamines having one or two benzene rings, two ar-N-methylamino substituents, and ar-alkyl substituents in all positions ortho to the amino substituents are novel compounds which can be used in the preparation of polyurethanes, polyureas, polyurethane-urea polymers, and epoxy resins.
Claims6
An aromatic diamine of the formula ##STR5## where R, R' and R" are independently selected from alkyl groups containing 1 to 6 carbons;
- Q, Q', T and T' are independently selected from alkyl groups containing 1-6 carbons;
- and Z is an alkylidene group containing 1 to 3 carbons.
An aromatic diamine which is a mixture of N,N'-dimethyl-3,5-diethyl-2,4-diaminotoluene and N,N'-dimethyl-3,5-diethyl-2,6-diaminotoluene.
Dependencies are inferred from the claim text.