Polymer fluorine has antibacterial activity

The invention relates to a fluoropolymer onto which is grafted at least one unsaturated monomer of the formula: wherein:. A represents a -C (= O) -O-, -OC (= O) - or -C (= O) -NR'-, - (CH2) xC (= O) -NH-, x being an integer between 1 and 12;. R and R 'are H or CH3;. B represents an alkylene chain in C1-C20, linear or branched, or arylene or alkylarylene;. W represents a quaternary ammonium group, phosphonium, a saturated or unsaturated heterocycle comprising a nitrogen atom selected from piperidine, piperazine, morpholine, thiomorpholine, thiazole, isothiazole, pyrazole, indole , indazole, imidazole, benzimidazole, quinoline, isoquinoline, benzotriazole, benzothiazole, benzoisothiazole, benzoxazole, benzoxazine, isoxazole, pyrrole, pyrazine, pyrimidine, pyridazine, quinazoline, acridine;. X represents a fluorinated polymer anion.Ce exhibits antibacterial activity.