| abstract |
Claimed are fluorous telomeric compounds of the formula RF - A -SO2 - Z, where RF is a perfluoroalkyl radical of 1 to 20 carbon atoms; A is a group of the formulae (I) or (II); R1 is CF3, OR4, Cl, Br or I; R2 is H or alkyl of 1 to 6 carbon atoms; R3 is alkylene of 1 to 13 carbon atoms; R4 is perfluoromethyl, perfluoropropyl or perfluoropropyloxypropyl; X and Y are H, Cl or F; Z is -OH, -Cl, -OM, -N(R2)R3OH, -N(R2)R3OCOCH = CH2 or - Z N(R2)R3OCOCCH3 = CH2; M is an alkali metal, ammonium or a mono-, di-, tri- or tetra-C1-C4- alkylammonium cation; a is from 0 to 10 and b is from 1 to 30. These compounds are copolymerized with further monomers. The copolymers thus obtained are useful for water-, oil- and soil-repellent finishing of fibrous substrates. |