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US 5,175,367 AGranted
Fluorine-containing diamines, polyamides, and polyimides
AssigneeE. I. Du Pont de Nemours and Company
InventorAndrew E. Feiring
Life of this patent
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Abstract
This invention concerns novel fluorine-containing diamines, polyamides and polyimides. The compounds are useful in the formation of moisture resistant films, fibers and shaped articles.
Claims7
A fluorinated diamine of structure I, ##STR8## wherein R.sub.f is a linear or branched perfluorinated alkyl group containing 1-18 carbon atoms or where said perfluorinated alkyl group has one F atom replaced by hydrogen and/or one F atom replaced by chlorine, R.sub.f optionally containing one or more ether oxygens between alkyl segments.
Dependencies are inferred from the claim text.