Fluorinated condensation copolyimides

Details Fluorinated condensation copolyimides Fluorinated condensation copolyimides

1992-12-04

1994-03-29

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528126, 528128, 528170, 528172, 528173, 528179, 528185, 528188, 528220, 528229, 528350, 524600, 4284735, C08C 6926, C08C 7310

Patent

active

052986004

ABSTRACT:
A fluorinated condensation copolyimide has repeating polymer units that include: ##STR1## in which X and Y are diamines. The copolyimide can be made by reacting a 3F-monomer and a 6F-monomer with an aromatic or aliphatic diamine. The 3F-monomer includes 4,4'-(2,2,2-trifluoro-1-phenylethylidene) diphthalic anhydride, a dialkylester of 4,4'-(2,2,2-trifluoro-1-phenylethylidene) diphthalic anhydride, 4,4'-(2,2,2-trifluoro-1-phenylethylidene) diphthalic acid, or mixtures thereof. The 6F-monomer includes 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene] diphthalic anhydride, a dialkylester of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene] diphthalic anhydride, 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene] diphthalic acid, or mixtures thereof.

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