Copolymerized quaternary ammonium salt and preparation method thereof

The invention discloses a copolymerized quaternary ammonium salt and a preparation method thereof, and belongs to the field of surfactants. Comprising the following steps: (1) reacting epichlorohydrin with tertiary amine to generate epoxy quaternary ammonium salt; and (2) recrystallizing, purifying and drying the epoxy quaternary ammonium salt obtained in the step (1) by adopting an organic solvent to obtain an epoxy quaternary ammonium salt monomer, and carrying out catalytic synthesis on the epoxy quaternary ammonium salt monomer in a reaction solvent to form the copolymerized quaternary ammonium salt. The sterilization target spot of the copolymerized quaternary ammonium salt only acts on cell walls and membranes, so that the copolymerized quaternary ammonium salt is not easy to generate drug resistance and has no co-screening effect. Even if the bacteria are subjected to 15 times of passage, the bacteria also generate drug resistance, namely the MIC is kept stable. 本发明公开了一种共聚季铵盐及制备方法，属于表面活性剂领域。包括以下步骤：(1)将