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- 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.La invención se refiere a una composición de cubierta acuosa que comprende un compuesto que tiene grupos reactivos A, y un compuesto de amonio cuaternario de acuerdo con la Fórmula (I), (II) o (III) donde R1 es un grupo alquilo, alquenilo, alquilarilo o arilalquilo de 5 a 50 átomos de carbono R2 es un grupo hidrocarbilo C1-C100, que opcionalmente contiene heteroátomos R3 y R4 son grupos alquileno que contienen de 1 a 4 átomos de carbono R5 y R6 son H o grupo hidrocarbilo ciclo C1-C100, que opcionalmente contiene heteroátomos R7 es un grupo hidrocarbilo C1-C100, que opcionalmente contiene heteroátomos R8 es un grupo hidrocarbilo C1-C100, que opcionalmente contiene hetero
