Copolymers containing fluorine and their use for the water-repellent and oil-repellent treatment of various substrates

Claim 1

A fluorinated copolymer which comprises: (a) 35 to 98% by weight of one or more polyfluorinated monomers of the formula: ##STR17## in which Rf represents perfluoroalkyl with a straight or branched chain containing 2 to 20 carbon atoms, Q represents oxygen or sulfur, B represents a bivalent chain selected from: ##STR18## --(CH 2 ) p --, --(CH 2 ) p --O--(CH 2 ) r --, --(CH 2 ) p --S--(CH 2 ) r --, --(CH 2 ) p --(OCH 2 CH 2 ) r --, --(CH 2 ) p --SO 2 --(CH 2 ) r --, --CH═CH--(CH 2 ) p --, ##STR19## --COO--(CH 2 ) p -- or ##STR20## in which p is a whole number from 1 to 20, q is a whole number from 1 to 4, r is a whole number from 1 to 20, R 6 is hydrogen, alkyl containing 1 to 10 carbon atoms, cycloalkyl containing 5 to 12 carbon atoms, hydroxyalkyl containing 2 to 4 carbon atoms, aryl or aryl substituted by alkyl containing 1 to 6 carbon atoms, R 7 is hydrogen or alkyl containing 1 to 4 carbon atoms, X, X', Y and Y' are the same or different and each represents hydrogen or alkyl containing 1 to 4 carbon atoms, one of the symbols R represents hydrogen and the other hydrogen or alkyl containing 1 to 4 carbon atoms; (b) 1 to 15% by weight of one or more monomers of the formula: ##STR21## in which B' represents linear or branched alkylene containing 1 to 4 carbon atoms, R' represents hydrogen or alkyl containing 1 to 4 carbon atoms, R 1 represents alkyl containing 1 to 18 carbon atoms, hydroxyethyl or benzyl, R 2 represents hydrogen or alkyl containing 1 to 18 carbon atoms, hydroxyethyl or benzyl or R 1 and R 2 together with the nitrogen form morpholino, piperidino or pyrrolidinyl-1; (c) 1 to 50% by weight of one or more pyrrolidone monomers of the formula: ##STR22## in which R 3 , R' 3 , R 4 and R 5 are the same or different and each represents hydrogen or alkyl containing 1 to 4 carbon atoms; and (d) up to 10% by weight of a monomer other than the monomers of formulae (I), (II) and (III), which is copolymerizable with said monomers of formulae (I), (II) and (III), and, optionally, its salt form obtained by salifying with an acid having a dissociation constant or first dissociation constant greater than 10 -5 , or its form obtained by quaternizing by means of a quaternizing agent.