The invention relates to an aqueous coating composition comprising a compound having reactive groups A, and a quaternary ammonium compound according to Formula I, II or III wherein R1 is an alkyl, alkenyl, alkylaryl or arylalkyl group having from 5 to 50 carbon atoms； R2 is a C1-C100 hydrocarbyl group, optionally containing heteroatoms； R3 and R4 are alkylene groups having from 1 to 4 carbon atoms； R5 and R6 are H or C1-C100 hydrocarbyl group, optionally containing heteroatoms； R7 is a C1-C100 hydrocarbyl group, optionally containing heteroatoms； R8 is a C1-C100 hydrocarbyl group, optionally containing heteroatoms； R9 is H or a methyl group； Z is a substituent containing at least one reactive group B which is capable of reacting with the reactive group A； X&minus； is an anion； y is 0 or 1； a is 0 or 1； and the sum of y and a is 1 or 2 and m is an integer from 1 to 30, preferably between 1 and 10, or between 2 and 6 n is an integer from 0-30, preferably between 1 and 10, or 2 and 6 T is a monomer unit； U is a monomer unit； V is a C1-C100 hydrocarbyl group, optionally containing hetero atoms； d is an integer between 1 and 5, preferably 1； e is an integer between 1 and 1000, preferably between 5 and 100； g is an integer between 1 and 100, preferably between 2 and 10； h is an integer between 1 and 5, preferably 2 or 3.L'invention porte sur une composition aqueuse de revêtement comprenant un composé ayant des groupes réactifs A et un composé d'ammonium quaternaire répondant à la formule (I), (II) ou (III), où R1 représente un groupe alkyle, alcényle, alkylaryle ou arylalkyle ayant de 5 à 50 atomes de carbone； R2 représente un groupe hydrocarbyle en C1-C100, contenant éventuellement des hétéroatomes； R3 et R4 représentent des groupes alkylène ayant de 1 à 4 atomes de carbone； R5 et R6 représentent H ou un groupe hydrocarbyle en C1-C100, contenant éventuellement des hétéroatomes； R7 représente un groupe hydrocarbyle en C1-C100, contenant éventuellement des hétéroatomes； R8
