Partially fluorinated sulfonated surfactants

摘要

The present invention comprises a compound comprising Formula 1A, 1B, or 1C

         (R<Sub>a</Sub>-O-CO-)<Sub>2</Sub>X     Formula 1A

         R<Sub>a</Sub>-O-CO-X-CO-O-(CH<Sub>2</Sub>CH<Sub>2</Sub>)R<Sub>f</Sub>     Formula 1B

         R<Sub>a</Sub>-O-CO-X-CO-O-R     Formula 1C

wherein
R<Sub>a</Sub> is the group R<Sub>f</Sub>OCF<Sub>2</Sub>CF<Sub>2</Sub>-(C<Sub>g</Sub>H<Sub>2g</Sub>)-; R<Sub>f</Sub>OCFHCF<Sub>2</Sub>O(CH<Sub>2</Sub>CH<Sub>2</Sub>O)<Sub>v</Sub>-(C<Sub>g</Sub>H<Sub>2g</Sub>)-; R<Sub>f</Sub>OCFHCF<Sub>2</Sub>O(C<Sub>w</Sub>H<Sub>2w</Sub>); or R<Sub>f</Sub>OCF(CF<Sub>3</Sub>)CONH-(C<Sub>g</Sub>H<Sub>2g</Sub>);
R<Sub>f</Sub> is C<Sub>c</Sub>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<Sub>e</Sub>H<Sub>(2e-1)</Sub>(SO<Sub>3</Sub>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<Sub>b</Sub>H<Sub>(2b+1)</Sub>-; and
b is from 1 to 18.