Bisaminophenyl-based curatives and amidine-based curatives and cure accelerators for perfluoroelastomeric compositions

A method for making a bisaminophenol-based curative, comprising:

• (a) reacting a perfluoroacyl fluoride with potassium fluoride to form a potassium alcoholate reaction product;
• (b) reacting the potassium alcoholate reaction product with a perfluoroallylfluorosulfate to form a perfluoroallyl ether;
• (c) reacting the perfluoroallyl ether with an oxidizing agent to form a perfluoroglycidyl ether;
• (d) reacting the perfluoroglycidyl ether with aluminum chloride in a fluorinated solvent to isomerize an epoxide group on the perfluoroglycidyl ether to a ketone;
• (e) reacting the ketone group with phenol in the presence of hydrogen fluoride to form a bisphenol-based compound;
• (f) nitration of the bisphenol-based compound to give a bisnitrophenol-based compound;
• and
• (g) reduction of the bisnitrophenol-based compound to form a bisaminophenol-based curative, wherein the bisaminophenol-based curative is capable of curing a perfluoroelastomeric composition.