Patent ID: 6111043
Filing Date: 2000-08-29
Classification: C08F,D21H,Y10T

Abstract:
Cationic fluorinated copolymers comprising resulting from copolymerization of:(a) 50 to 92% by weight, of at least one polyfluorinated monomer of formula: ##STR5## in which Rf represents a straight- or branched-chain perfluorinated radical containing 2 to 20 carbon atoms, B represents a bivalent chain sequence which is bonded to O via a carbon atom and which optionally contains at least one oxygen, sulphur and/or nitrogen atom, one of the R symbols represents a hydrogen atom and the other a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms;(b) 1 to 25% by weight of at least one monomer of formula: ##STR6## in which B' represents a linear or branched alkylene radical containing 1 to 4 carbon atoms, R' represents a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms, the R.sup.1 and R.sup.2 symbols, which are identical or different, each represent a hydrogen atom, a linear or branched alkyl radical containing 1 to 18 carbon atoms or a hydroxyethyl or benzyl radical, or R.sup.1 and R.sup.2, together with the nitrogen atom to which they are bonded, form a morpholino, piperidino or 1-pyrrolidinyl radical,(c) 1 to 25% by weight of a vinyl derivative of formula:R""--CH.dbd.CH.sub.2 (III)in which R"" can be an alkyl carboxylate or alkyl ether group containing from 1 to 18 carbon atoms;(d) 0 to 10% by weight of any monomer other than the monomers of formulae I, II and III, the copolymerization being carried out in solution in a water-miscible organic solvent or mixture of water-miscible organic solvents and being followed by a stage of dilution with an aqueous solution of an inorganic or organic acid,the stage is carried out in the presence of hydrogen peroxide or is followed by treatment with an aqueous hydrogen peroxide solution.