The present invention comprises a compound comprising Formula 1A, 1B, or 1C (Ra-O-CO-)2X Formula 1A Ra-O-CO-X-CO-O-(CH2CH2)Rf Formula 1B Ra-O-CO-X-CO-O-R Formula 1CwhereinRa is the group RfOCF2CF2-(CgH2g)- RfOCFHCF2O(CH2CH2O)v-(CgH2g)- RfOCFHCF2O(CwH2w) or RfOCF(CF3)CONH-(CgH2g)Rf is CcF(2c+1)c is 2 to 6g is 1 to 4 v is 1 to 4 w is from 3 to 12X is a linear or branched difunctional alkyl sulfonate group -CeH(2e-1)(SO3M)-, wherein e is 2 or 3M is a monovalent cation selected from the group consisting of hydrogen, ammonium, and alkali metalR is H or a linear or branched alkyl group CbH(2b+1)- andb is from 1 to 18.
