Composition characterized in that, it consists of, for 100 weight %:a) From 1 weight % to 10 weight % of at least one of 1,2-benzisothiazolin-3one and its derivatives,b) From 0.5 weight % to 5 weight % of at least one of 2-mercaptopyridine N-oxide, its salts and its derivativesc) From 1 weight % to 6 weight % of N,N-bis(3-amino propyl)-dodecylamined) At least one alkalinizing agent, in a concentration such that the pH is greater than 11, ande) Water up to 100 weight %；the process for its preparation and its as an additive of technical products.
