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US 5,334,693 AGranted
Aramid composition
AssigneeE. I. Du Pont de Nemours and Company
InventorRobert S. Irwin
Life of this patent
Estimating the term…
Abstract
Aramids having repeat units derived from p-phenylenediamine, 4,4'-bis(3-aminophenoxy)biphenyl and terephthalic acid. These aramids have good strength properties, particularly after drawing, and good high temperature properties. The aramids are useful for fibers and films.
Claims11
An aramid, consisting essentially of repeat units of 20 to 80 mole percent of a first unit of the formula ##STR3## and a second unit of the formula ##STR4##
Dependencies are inferred from the claim text.