Fluoro-anhydride curing agents and precursors thereof for fluorinated epoxy resins
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsJames R. Griffith, Jacques G. O'Rear
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Abstract
Fluoro-anhydride curing agents for fluorinated epoxy resins, especially for highly fluorinated epoxy resins selected from the class consisting of hydroxyperfluoroalkyl phthalic anhydride, hydroxyperfluoroalkyl pyromellitic dianhydride, and mixtures thereof; a fluoro-anhydride curing agent for fluorinated epoxy resins that is the toluene-soluble mixture prepared by heating a hydroxyperfluoroalkyl benzenepentacarboxylic acid at about 240.degree. C; precursors for all of the curing agents; and the epoxy resins prepared therefrom.
Claims10
A precursor of a curing agent for fluorinated epoxy resins selected from the class consisting of hydroxyperfluoroalkyl phthalic acid, hydroxyperfluoroalkyl pyromellitic acid, hydroxyperfluoroalkyl benzenepentacarboxylic acid, and mixtures thereof.
A curing agent for fluorinated epoxy resins selected from the class consisting of hydroxyperfluoroalkyl phthalic anhydride, hydroxyperfluoroalkyl pyromellitic dianhydride and mixtures thereof.
A curing agent for fluorinated epoxy resins which is the toluene soluble portion of the product prepared by heating a hydroxyperfluoroalkyl benzenepentacarboxylic acid at a temperature from 235.degree. to 250.degree. C.
Dependencies are inferred from the claim text.