| abstract |
The invention provides compounds having formula (I) wherein Rf is CnF2n+1-(CH2)m-, wherein n is 1 to 22 and m is 0, or an integer from 1 to 3; X is -CO2-, -SO3-, -CONH-, -O-, -S- a covalent bond, -SO2NR-, or -NR-, wherein R is H or C1 to C5 alkylene; Y is -CH2- wherein z is 0 or 1; and R1 is H, lower alkyl or R¿f?-X-Yz- with the provisos that when X is -S-, or -O-, m is 0, and z is 0, n is ≥7 and when X is a covalent bond, m or z is at least 1, and uses thereof. |