Polyurethanes cured with derivatives of 2,4-diamino-benzoic acid
AssigneeE. I. Du Pont de Nemours and Company
InventorNorman Martin Van Gulick
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Abstract
Polyurethane/polyurea compositions comprising the reaction product of an organic diisocyanate, a glycol having a molecular weight of 500-5000 and a derivative of 2,4-diaminobenzoic acid selected from C.sub.1 -C.sub.8 alkyl and substituted alkyl esters, the amide, alkyl substitued amides, the anilide, substituted anilides, the nitrile and mixtures thereof.
Claims4
Polyurethane elastomers which contain structural units of the formula ##STR3## and mixtures thereof in which R is a C.sub.1 -C.sub.8 alkyl radical.
A polyurethane, polyurea composition which consists essentially of the reaction product of a glycol having weight of about 500-5,000 and an organic diisocyanate to form a prepolymer and then curing said prepolymer with a curing agent having the general formula:
- ##STR4## wherein Y = CO.sub.2 R.sub.1 and R.sub.1 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl groups.
Dependencies are inferred from the claim text.