The present invention comprises a compound comprising Formula 1A, 1B, or 1C €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ (R a -O-CO-) 2 X€ƒ€ƒ€ƒ€ƒ€ƒFormula 1A €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ R a -O-CO-X-CO-O-(CH 2 CH 2 )R f €ƒ€ƒ€ƒ€ƒ€ƒFormula 1B €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ R a -O-CO-X-CO-O-R€ƒ€ƒ€ƒ€ƒ€ƒFormula 1C wherein R a is the group R f OCF 2 CF 2 -(C g H 2g )- R f OCFHCF 2 O(CH 2 CH 2 O) v -(C g H 2g )- R f OCFHCF 2 O(C w H 2w ) or R f OCF(CF 3 )CONH-(C g H 2g ) R f is C c F(2c+1) c is 2 to 6 g is 1 to 4 v is 1 to 4 w is from 3 to 12 X is a linear or branched difunctional alkyl sulfonate group -C e H (2e-1) (SO 3 M)-, wherein e is 2 or 3 M is a monovalent cation selected from the group consisting of hydrogen, ammonium, and alkali metal R is H or a linear or branched alkyl group C b H (2b+1) - and b is from 1 to 18.
